JP2004197661A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized and highly efficient pump which can perform fuel supply to a cell or the like on the outside of the pump by securely operating a suction valve and a discharge valve while interlocking with vibration of a vibration plate. <P>SOLUTION: The pump P includes a pump body 1 having a pump room 12, the suction valve 14 which can regulate intake of a fluid into the pump room 12 and the discharge valve 16 which can regulate discharge of the fluid sucked in the pump room 12 to the outside of the pump room 12. An electromagnet 3 is arranged in the pump body 1. The suction valve 14 and the discharge valve 16 are respectively provided with permanent magnets 15, 17 at their proximal portions. The electromagnet 3 can attract and repel the permanent magnets 15, 17. By changing the magnetic pole of the electromagnet 3, the suction valve 14 can open or close the suction passage of the fluid, and the discharge valve 16 can also open or close the discharge passage of the fluid. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pump, and more particularly, to a pump suitable for performing suction of a fluid into a pump chamber and discharge of a fluid to the outside of a pump chamber using vibration of a diaphragm.
[0002]
[Prior art]
Referring to FIG. 6, a conventionally proposed fuel supply pump will be described with reference to FIG. 6. The pump K has a recessed pump chamber 21 a formed in the upper surface of a lower frame 21, and the pump chamber 21 a has a bottom wall 21 b. It is shielded by.
A suction port 22 and a discharge port 23 are formed through the bottom wall 21b, and a suction valve 24 is disposed near the suction port 22 inside the pump chamber 21a, and the discharge port 24 outside the pump chamber 21a. A discharge valve 25 is provided in the vicinity.
Then, the suction valve 24 and the discharge valve 25 operate in response to a change in the pressure of the fluid in the pump chamber 21a, so that the backflow of the fluid (not shown) as the fuel is prevented.
[0003]
In addition, a diaphragm 26 constituting a ceiling wall of the pump chamber 21a is disposed above the pump chamber 21a. The outer periphery of the diaphragm 26 is sandwiched between the upper frame 27 and the lower frame 21, and the pump chamber 21a is sealed.
A permanent magnet 28 is fixed to the center of the upper surface of the diaphragm 26, and an electromagnet 29 is disposed on the permanent magnet 28 with a predetermined gap.
Further, the permanent magnet 28 and the electromagnet 29 constitute diaphragm driving means capable of causing the diaphragm 26 to vibrate.
[0004]
The operation of such a conventional pump K will be described. When a voltage of a predetermined frequency is applied to an electromagnet 29 serving as a diaphragm driving unit, a periodic electromagnetic force is generated in the electromagnet 29, and the permanent magnet 28 is driven. Aspirate periodically. The diaphragm 26 also reciprocates following the vibration of the permanent magnet 28 due to the periodic attraction.
When the diaphragm 26 is deformed upward in the reciprocating vibration of the diaphragm 26, the volume of the pump chamber 21a increases and the pressure in the pump chamber 21 becomes lower than the outside air pressure. Thereby, the suction valve 24 is opened and the discharge valve 25 is closed, so that the fluid is sucked from the suction port 22 into the pump chamber 21a.
[0005]
Thereafter, when the diaphragm 26 is deformed downward, the volume of the pump chamber 21a is reduced, the sucked fluid is compressed, and the pressure in the pump chamber 21 rises above the external pressure.
Thereby, the suction valve 25 is closed and the discharge valve 25 is opened, so that the fluid in the pump chamber 21a is discharged from the discharge port 23.
By repeating the above suction operation and discharge operation, the suction valve opens and closes the suction path, and the discharge valve opens and closes the discharge path, so that fuel can be supplied to an external battery or the like.
[0006]
[Patent Document]
JP 2001-263250A [Problems to be Solved by the Invention]
In such a conventionally proposed pump K, there is a strong demand for miniaturization in order to use it in a portable electronic device, and it has been difficult to increase the amplitude of the diaphragm 26.
Therefore, in order to increase the supply amount of the fluid, the vibration frequency of the diaphragm 26 has been increased.
However, in the conventional pump K, when the vibration frequency of the vibration plate 26 is increased, the operation of the suction valve 24 and the discharge valve 25 cannot follow the vibration of the vibration plate 16, and the efficiency of fuel supply to an external battery or the like deteriorates. There was a risk of becoming.
[0007]
The present invention has been made in view of the above-described problems, and reliably operates an intake valve and a discharge valve in conjunction with vibration of a diaphragm to efficiently supply fuel to an external battery or the like. It is an object of the present invention to provide a small and high-performance pump capable of performing the above-described operations.
[0008]
[Means for Solving the Problems]
As a first means for solving the above problems, the pump of the present invention, a pump main body having a pump chamber, a suction valve capable of restricting suction of fluid into the pump chamber, and the fluid sucked into the pump chamber A discharge valve capable of restricting discharge to the outside of the pump chamber, an electromagnet is disposed on the pump body, and the suction valve and the discharge valve each include a permanent magnet capable of attracting and repelling the electromagnet. The suction valves are disposed on the base side, and the switching of the magnetic poles of the electromagnet enables the suction valve to open and close the suction path of the fluid, and the discharge valve enables the discharge path of the fluid to open and close. It is characterized by the following.
[0009]
Further, as a second means for solving the above-mentioned problem, the pump chamber has a diaphragm capable of applying a suction force and a discharge force to the fluid, and the diaphragm switches a magnetic pole of the electromagnet. And vibrates in synchronization with.
[0010]
Further, as a third means for solving the above-mentioned problem, a vibrator is fixed to one surface side of the diaphragm, and the diaphragm vibrates via the vibrator. And
[0011]
Further, as a fourth means for solving the above-mentioned problem, the vibrator is characterized in that an elongate magnet is fixed to a side facing the electromagnet.
[0012]
Further, as a fifth means for solving the problem, the diaphragm and the suction valve and the discharge valve are disposed to face each other with the electromagnet interposed therebetween, and when the electromagnet is driven and controlled, The vibration plate vibrates, and the suction valve opens and closes the suction path, and the discharge valve opens and closes the discharge path.
[0013]
Further, as a sixth means for solving the above-mentioned problem, when the fluid is sucked into the pump chamber via the suction path, the suction valve opens the suction path and the discharge valve sets the discharge valve. When closing the discharge path and discharging the fluid sucked into the pump chamber to the outside via the discharge path, the discharge valve opens the discharge path and the suction valve closes the suction path. It is characterized by having done.
[0014]
According to a sixth aspect of the present invention, the fluid is prevented from flowing backward when the suction valve and the discharge valve close the suction path and the discharge path. And
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
A pump according to the present invention will be described with reference to FIGS. 1 is a cross-sectional view of a main part of the pump of the present invention, FIG. 2 is a cross-sectional view of FIG. 1 along line 2-2, FIG. 3 is a plan view of the pump of the present invention, and FIGS. It is principal part sectional drawing explaining operation | movement of a pump.
[0016]
First, as shown in FIG. 2, the pump P of the present invention is provided with a pump body 1 having a substantially cylindrical outer shape. The pump body 1 is provided with a first case 2 having a hollow inside, and the first case 2 is, as shown in FIG. The left side is open.
Inside the cavity of the first case 2, an electromagnet mounting portion 2b having a small inner diameter is formed on the side wall 2a on the right side in the drawing, and a magnet sliding portion 2c having a larger inner diameter is formed on the open side on the left side in the drawing. .
[0017]
An electromagnet 3 is fitted to and attached to the electromagnet mounting portion 2b. The electromagnet 3 is formed by winding a coil 4 indicated by a two-dot chain line around an iron core 3a and by a predetermined amount from an external magnet terminal 5. Can be applied to the coil 4.
When a voltage of a predetermined frequency is applied to the electromagnet 3, a periodic electromagnetic force is generated between the first magnetic pole 3b and the second magnetic pole 3c of the electromagnet 3.
That is, by applying a voltage of a predetermined frequency to the coil 4, the first and second magnetic poles 3b and 3c are periodically switched to an N pole and an S pole.
The electromagnet 3 fitted to the electromagnet mounting portion 2b is fixed by screws 6.
[0018]
A diaphragm 7 made of a thin elastic material such as rubber is disposed at an open end on the left side of the first case 2 in the drawing. A vibrator 9 made of a material or the like is fixed.
Further, a permanent magnet 10 is fixed to the vibrator 9 fixed to the diaphragm 7 on the side facing the electromagnet 3 with an adhesive or the like.
A second case 11 is attached to the outer peripheral portion on the left side of the first case 2 in the drawing by press-fitting or bonding, and the diaphragm 7 is narrowed by the second case 11 and the first case 2. Is held.
In the second case 11, an inflow hole 11b is formed to penetrate a suction-side joint 11a formed to protrude upward in the figure, and an outflow hole 11d is formed to penetrate a discharge-side joint 11c protruding to a lower side in the figure. I have.
In the second case 11, a concave pump chamber 12 is formed inside, and the pump chamber 12 is sealed by the diaphragm 7, and formed in a suction hole 11b formed in the suction side joint 11a and a discharge side joint 11c. With the outflow hole 11d, a fluid such as alcohol can be sucked or discharged into the pump chamber 12 inside.
[0019]
Further, a third case 13 is fixed to the outer peripheral portion of the first case 2 on the side wall 2a side by press-fitting or bonding. The third case 13 has a first magnet holding portion 13a slidably holding a suction-side magnet 15 fixed to a suction valve 14 described later, and a discharge-side magnet 17 fixed to a discharge valve 16 described later. And a second magnet holding portion 13b for holding the second magnet holding portion.
In the third case 13, a first connection hole 13d is formed through a suction-side joint portion 13c formed to protrude upward in the figure, and a second connection hole 13f is formed in a discharge-side joint 13e formed protruding downward in the figure. Are formed through.
[0020]
In addition, the third case 13 has a suction hole 13g formed near the first magnet holding portion 13a, which can be shielded by a suction valve 14 described later, and is shielded by a discharge valve 16 described later, near the second magnet holding portion 13b. A possible discharge hole 13h is formed.
The first magnet holding portion 13a holds an umbrella-shaped suction valve 14 made of rubber or the like. The suction valve 14 has the base of the center axis located in the first magnet holding portion 13a, the suction-side magnet 15 is fixed to the base, and the umbrella portion can shield the suction hole 13g. I have.
The second magnet holding portion 13b also holds a discharge valve 16 of the same material and shape as the suction valve 14. The base of the central axis of the discharge valve 16 is located in the second magnet holding portion 13b. The discharge-side magnet 17 is fixed to the base, and the umbrella portion can shield the discharge hole 13h. .
[0021]
A fourth case 18 that covers the suction valve 14 and the discharge valve 16 is fixed to the outer peripheral portion on the right side of the third case 13 in the figure by press-fitting or an adhesive.
The fourth case 18 has a suction chamber 18a in which the suction valve 14 is slidably housed on the upper side in the figure, and is formed in a closed manner. And an independent discharge chamber 18b is formed closed. A suction-side joint 18c protrudes from a portion where the suction chamber 18a is formed, and a suction port 18d is formed through the suction-side joint 18c.
[0022]
A discharge joint 18e protrudes from a portion where the discharge chamber 18b is formed, and a discharge port 18f is formed through the discharge joint 18e.
In addition, fluid such as fuel of the battery from the outside can be sucked into the suction chamber 18a via the suction port 18d, and fluid discharged from the pump chamber 12 flows from the discharge chamber 18b to the outside via the discharge port 18f. The battery can be supplied.
The suction-side joint 11a of the second case 11 and the suction-side joint 13c of the third case 13 are connected by a suction pipe 19, and are connected to the suction hole 11b of the pump chamber 12 and the first case 13 of the third case 13. The connection hole 13d is connected.
[0023]
The discharge-side joint 11c of the second case 11 and the discharge-side joint 13e of the third case 13 are connected by a discharge pipe 20, and the outlet 11d of the pump chamber 12 and the second case 13 The connection hole 13f is connected.
A suction path is formed by the suction port 18d, the suction chamber 18a, the suction hole 13g, the first connection hole 13d, the suction pipe 19, and the inflow hole 11b.
A discharge path is formed by the outflow hole 11d, the discharge pipe 20, the second connection hole 13f, the discharge hole 13h, the discharge chamber 18b, and the discharge port 18f.
[0024]
The operation of the pump P of the present invention having such a configuration will be described with reference to FIGS. 4 and 5. First, in order to suck a fluid such as an alcohol into the pump chamber 12, a voltage of a predetermined frequency is applied from the magnet terminal 5. When the voltage is applied to the coil 4, as shown in FIG. 4, for example, the first magnetic pole 3b of the electromagnet 3 is an S pole, and the second magnetic pole 3c is an N pole.
Then, the suction side magnet 15 of the suction valve 14 repels the first magnetic pole 3b which has become the S pole, the suction valve 14 slides rightward in the drawing to open the suction hole 13g, and the discharge valve 16 discharges. The side magnet 17 is attracted to the second magnetic pole 3c serving as the N pole, and the ejection hole 13h is shielded.
[0025]
At the same time, the permanent magnet 10 is attracted to the electromagnet 3, and the diaphragm 7 is deformed rightward in the drawing, and the volume inside the pump chamber 12 increases. As a result, the air pressure in the pump chamber 12 becomes lower than the external air pressure, and a suction force is given to the fluid in the suction chamber 18a, so that the fluid passes through the opened suction hole 13 through the suction path in the direction of arrow A. And is sucked into the pump chamber 12.
During this suction operation, the discharge hole 13h is blocked by the discharge valve 16, so that the fluid discharged to the discharge chamber 18c can be prevented from flowing back to the pump chamber 12.
[0026]
Then, when a predetermined amount of fluid flows into the pump chamber 12 whose volume has increased, the magnetic pole of the electromagnet 3 is switched by an external control unit (not shown), and as shown in FIG. And the second magnetic pole 3c becomes the S pole.
Then, the discharge-side magnet 17 of the discharge valve 16 repels the second magnetic pole 3c, which has become the S-pole, so that the discharge valve 16 slides rightward in the drawing, and the discharge hole 13h is opened. The suction-side magnet 15 is attracted to the second magnetic pole 3c which has become the N pole, and the suction hole 13g is shielded.
[0027]
At the same time, the permanent magnet 10 of the vibrator 9 repels the electromagnet 3, and the diaphragm 7 is deformed to the left in the drawing, and the volume inside the pump chamber 12 is reduced. As a result, the air pressure in the pump chamber 12 becomes higher than the external air pressure, and a discharge force is applied to the fluid. The fluid passes through the discharge path in the direction of arrow B from the outflow hole 11d, and the external battery, etc. Can be fueled.
During this discharge operation, the suction hole 13g is blocked by the suction valve 14, so that the fluid sucked into the pump chamber 12 can be prevented from flowing back to the suction chamber 18a.
[0028]
In such a pump P of the present invention, the suction valve 14 can open and close the fluid suction path and the discharge valve 16 can open and close the fluid discharge path in synchronization with the switching of the magnetic pole of the electromagnet 3. Has become. The vibration plate 7 also vibrates in synchronization with the switching of the magnetic pole of the electromagnet 3.
For this reason, even if the magnetic poles of the electromagnet 3 are switched at a high speed of 40 to 50 times / second, the suction valve 14 and the discharge valve 16 can be reliably operated to open and close the suction path and the discharge path. can do.
[0029]
As an example of the use of the pump P of the present invention as described above, a clean power supply means that does not cause environmental pollution has recently been demanded against the background of environmental problems such as air pollution. As one example, a fuel cell has been developed which can obtain desired electric power by subjecting methyl alcohol as a fuel to a decomposition chemical reaction.
Such a fuel cell is expected to be useful in various fields such as a battery for an automobile. Furthermore, in recent years, a new concept of using a small fuel cell as a battery for a portable electronic device has been born.
The fuel composed of a fluid such as methyl alcohol can be supplied to such a small-sized fuel cell for a portable electronic device in a short time by using the pump P of the present invention.
[0030]
【The invention's effect】
As described above, in the pump of the present invention, the suction valve and the discharge valve are provided with permanent magnets that can be attracted and repelled by the electromagnet at the base side, and the switching of the magnetic poles of the electromagnet causes the suction valve to draw fluid. Since the path can be opened and closed and the discharge valve can open and close the discharge path of the fluid, the suction valve and the discharge valve can be reliably operated by the magnetic pole switching control of the electromagnet.
Therefore, it is possible to provide a small, high-performance pump that can increase the number of times of switching the magnetic poles of the electromagnet and reliably supply a large amount of fuel to an external fuel cell or the like.
[0031]
In addition, the pump chamber has a vibrating plate capable of applying a suction force and a discharge force to the fluid, and the vibrating plate vibrates in synchronization with the switching of the magnetic pole of the electromagnet. By increasing or decreasing the number of times, the vibration frequency of the diaphragm can be easily changed.
[0032]
In addition, a vibrator is fixed to one side of the vibrating plate, and the vibrating plate vibrates through the vibrator. Therefore, the vibrator functions as a weight to more reliably vibrate the vibrating plate. Can be.
[0033]
Further, since the elongate magnet is fixed to the vibrator on the side facing the electromagnet, the diaphragm can be vibrated reliably in synchronization with the switching of the magnetic pole of the electromagnet.
[0034]
In addition, when the electromagnet is driven and controlled, the diaphragm vibrates, the suction valve opens and closes the suction path, and the discharge valve opens and closes the discharge path. In addition, it is possible to control the discharge valve and to provide a pump having a small number of parts.
[0035]
When the fluid is sucked into the pump chamber via the suction path, the suction valve opens the suction path, the discharge valve closes the discharge path, and the fluid sucked into the pump chamber is discharged to the outside via the discharge path. When discharging, the discharge valve opens the discharge path and the suction valve closes the suction path, so that the suction path and the discharge valve can reliably open and close the suction path and the discharge path.
Therefore, a high-performance pump with good supply efficiency can be provided.
[0036]
Further, when the suction valve and the discharge valve close the suction path and the discharge path, the fluid does not flow backward, so that a pump with higher supply efficiency can be provided.
[Brief description of the drawings]
FIG. 1 is a sectional view of a main part of a pump according to the present invention.
FIG. 2 is a sectional view taken along line 2-2 of FIG.
FIG. 3 is a plan view of the pump of the present invention.
FIG. 4 is a sectional view of a main part for explaining the operation of the pump of the present invention.
FIG. 5 is a sectional view of a main part for explaining the operation of the pump of the present invention.
FIG. 6 is a schematic diagram illustrating a conventional pump.
[Sign sharp]
DESCRIPTION OF SYMBOLS 1 Pump main body part 2 First case 2a Side wall 2b Electromagnet attaching part 3 Electromagnet 5 Magnet terminal 7 Vibrating plate 8 Rivets 9 Vibrator 10 Permanent magnet 11 Second case 12 Pump chamber 13 Third case 14 Suction valve 15 Intake side Magnet 16 Discharge valve 17 Discharge side magnet 18 Fourth case 19 Suction pipe 20 Discharge pipe

Claims (7)

A pump body having a pump chamber, a suction valve capable of regulating suction of fluid into the pump chamber, and a discharge valve capable of regulating discharge of the fluid sucked into the pump chamber to outside the pump chamber;
An electromagnet is provided in the pump body, and the suction valve and the discharge valve are provided with permanent magnets that can attract and repel the electromagnet on the base side, respectively. A pump, wherein a suction valve is capable of opening and closing a suction path of the fluid, and the discharge valve is capable of opening and closing a discharge path of the fluid. The pump chamber has a vibrating plate capable of applying a suction force and a discharge force to the fluid, and the vibrating plate vibrates in synchronization with switching of a magnetic pole of the electromagnet. Item 1. The pump according to Item 1. 3. The pump according to claim 2, wherein a vibrator is fixed to one surface side of the vibrating plate, and the vibrating plate vibrates via the vibrator. 4. The pump according to claim 3, wherein the vibrator has a permanent magnet fixed to a side facing the electromagnet. The diaphragm, the suction valve, and the discharge valve are disposed to face each other with the electromagnet interposed therebetween. When the electromagnet is driven and controlled, the diaphragm vibrates, and the suction valve moves through the suction path. The pump according to any one of claims 1 to 4, wherein the discharge valve opens and closes the discharge path. When the fluid is sucked into the pump chamber via the suction path, the suction valve opens the suction path, the discharge valve closes the discharge path, and the fluid sucked into the pump chamber is 6. The discharge valve according to claim 1, wherein, when discharging to the outside via a discharge path, the discharge valve opens the discharge path and the suction valve closes the suction path. The described pump. The fluid according to any one of claims 1 to 6, wherein the fluid does not flow backward when the suction valve and the discharge valve close the suction path and the discharge path. pump.

Images