JP6813764B2 - Gas pump - Google Patents

Description

The present invention relates to a gas pump that compresses and discharges gas.

Conventionally, an electromagnetic diaphragm pump (hereinafter, simply referred to as “pump”), which is an example of this type of gas pump, is disclosed in Patent Document 1 below. This pump includes a pump main body that compresses and discharges gas, and a switching mechanism that alternately closes two discharge ports provided in the tank with a switching valve plate. In the switching mechanism unit, the switching valve plate is configured to be driven by the electromagnetic force of the solenoid.
According to this configuration, one of the two discharge ports is blocked when the switching valve plate is driven, and the compressed gas discharged from the pump body is discharged from the discharge port that is not blocked by the switching valve plate. It flows out of the tank.

Japanese Unexamined Patent Publication No. 2003-35266

A solenoid as described above is configured such that a magnetic field is generated in the center of a coil by supplying electric power from a power source, and a magnetized fixed core attracts a movable core to operate. In this configuration, if the smoothness of the surface to be attracted by the fixed core is low, or if foreign matter adheres between the surface to be attracted by the fixed core and the movable iron core, the movable core is the surface to be attracted by the fixed core. It is known that noise is generated when vibrating while being adsorbed on the surface. In particular, in the case of an AC solenoid, the current of the AC power supply changes periodically, and the suction force of the movable core with respect to the fixed core also periodically increases and decreases accordingly, so that the movable core is more likely to vibrate. The problem of noise is prominent. This noise is a sound generated by resonating with the frequency of an alternating current, and is called a "beating sound".

Therefore, in order to suppress the generation of noise when using a solenoid, measures are taken to improve the smoothness of the surface to be attracted by the fixed iron core, improve the adhesion between the surface to be attracted by the fixed iron core and the movable iron core, and suppress vibration. Conceivable. However, in the case of this measure, it is necessary to improve the processing accuracy of the fixed iron core, which may cause a problem that the product cost of the pump is increased.

The present invention has been made in view of the above problems, and is to provide an effective technique for suppressing the generation of noise by a solenoid at a low cost in a pump that switches a flow path of a compressed gas by using a solenoid. ..

One aspect of the present invention is
A gas pump including a pump main body that compresses and discharges gas, and a flow path switching unit that switches the flow path of the compressed gas compressed by the pump main body.
The flow path switching unit
It has an inflow chamber into which the compressed gas flows from the pump main body, a plurality of outlets, and a plurality of flow paths for allowing the compressed gas to flow from the inflow chamber to each of the plurality of outlets. With the tank
A switching valve that performs a flow path switching operation for the compressed gas so that the inflow chamber of the tank communicates with any one of the plurality of flow paths.
A solenoid that causes the flow path switching operation of the switching valve by electromagnetic force and is fixed to the tank in a state of being pressed via an insulating member having vibration insulation.
Equipped with a,
The flow path switching portion includes a first wall portion and a second wall portion arranged on both sides of the solenoid in an intersecting direction intersecting the linear motion direction of the switching valve, and the first wall portion is the bottom of the tank. It is configured as a wall portion, and the second wall portion is configured as a partition member that separates the pump main body portion and the tank.
The solenoid has the partition member in a state where the insulating member is interposed between the bottom wall portion and each of the partition members and is sandwiched between the bottom wall portion and the partition member in the crossing direction. It is in a gas pump that is fixed to the tank by using a fastening force that is fastened to the tank by a screw member .

In the above gas pump, the compressed gas flows from the pump main body to the tank of the flow path switching part. The compressed gas that has flowed into the inflow chamber of the tank flows into any one of the plurality of flow paths by the flow path switching operation of the switching valve. The solenoid operates when power is supplied from the power source to cause the flow path switching operation of the switching valve by electromagnetic force. This solenoid is configured to be fixed to the tank in a state of being pressed through an insulating member having vibration insulation.
According to this configuration, the vibration generated when the solenoid is operated is absorbed by the insulating member having vibration insulation. As a result, the generation of noise by the solenoid is suppressed. Further, by using the insulating member, the cost required for the structure for suppressing the generation of noise can be suppressed low.

As described above, according to the above aspect, it is possible to provide a gas pump capable of suppressing the generation of noise by the solenoid at low cost.

An exploded perspective view of the electromagnetic pump of this embodiment. The plan view of the flow path switching part in FIG. The perspective view around the solenoid in the flow path switching part in FIG. The cross-sectional view around the solenoid in the flow path switching part in FIG. The plan view which shows the state of the switching valve at the time of operation of a solenoid in a flow path switching part. The plan view which shows the state of the switching valve when the solenoid is not operated in the flow path switching part. The figure which shows typically the pump main body part in FIG. FIG. 7 is a diagram showing a state when the vibrator strokes in one direction in FIG. 7. FIG. 7 is a diagram showing a state when the vibrator strokes in the other direction in FIG. 7.

The "gas" used in the gas pump includes various gases such as a nonflammable gas, a flammable gas, a flammable gas, and a mixed gas in which a plurality of gases belonging to these gases are mixed. For example, the air used in an air pump, which is one of the gas pumps, also corresponds to "gas" here.

In the gas pump, the flow path switching portion includes a first wall portion and a second wall portion arranged on both sides of the solenoid in an intersecting direction intersecting the linear motion direction of the switching valve, and the solenoid is described in the above. The insulating member is interposed between each of the first wall portion and the second wall portion, and is fixed to the tank in a state of being sandwiched between the first wall portion and the second wall portion in the crossing direction. It is preferable to be done.
In this case, the solenoid can be easily fixed to the tank by utilizing the force of sandwiching the solenoid between the first wall portion and the second wall portion. Further, since the direction in which the first wall portion and the second wall portion sandwich the solenoid intersects with the linear motion direction of the switching valve, the force for sandwiching the solenoid can be low.

In the gas pump, in the flow path switching portion, the first wall portion is configured as the bottom wall portion of the tank, and the second wall portion is configured as a partition member for partitioning the pump main body portion and the tank. It is preferable that the solenoid is fixed to the tank by utilizing the fastening force for fastening the partition member to the tank with a screw member.
In this case, the work of fastening the partition member to the tank also serves as the work of fixing the solenoid to the tank. As a result, the structure in which the solenoid itself is directly fixed to the tank by a screw member or the like can be omitted. Further, in the event of a solenoid failure or inspection, the solenoid can be easily removed from the tank by releasing the solenoid from being pinched.

In the gas pump, either one of the first wall portion and the second wall portion is configured as a metal wall portion made of a metal material, and is interposed between the metal wall portion and the solenoid. It is preferable that the insulating member has both vibration insulation and electrical insulation.
In this case, the insulating member can be used to enhance the electrical insulation of the solenoid. That is, the solenoid has a double insulation structure in which an additional electrical insulation structure is added to the original basic electrical insulation structure. This makes it possible to eliminate the ground that is commonly attached to a tank if it is made of metal.

In the gas pump, the insulating member preferably includes a locking portion for locking the solenoid.
In this case, when the solenoid is fixed to the tank, the solenoid can be integrated with the insulating member in advance by the locking portion of the insulating member. As a result, it is not necessary to assemble the solenoid and the insulating member individually, and the work of assembling the solenoid and the insulating member becomes easy.

In the gas pump, the insulating member is preferably made of a resin material or a rubber material.
In this case, the product cost of the pump can be kept low by using a general-purpose resin material or rubber material for the insulating member.

In the above gas pump, the pump main body includes a diaphragm that can be elastically deformed to perform the suction operation and the discharge operation of the gas, a vibrator having a permanent magnet and connected to the diaphragm, and the vibrator. It is preferable to include a drive unit that applies an electromagnetic force to the vibrator so as to elastically deform the diaphragm and vibrate reciprocally.
As a result, in an electromagnetic pump using a diaphragm, it is possible to inexpensively suppress the generation of noise due to the solenoid of the flow path switching portion.

(Embodiment)
Hereinafter, an embodiment of the electromagnetic pump of the present invention will be described with reference to the drawings. This electromagnetic pump is typically used to supply air to the water to be treated in a septic tank or to supply driving air to an air lift pump for transferring the water to be treated in a septic tank. ..

In the drawings for explaining this electromagnetic pump, the first direction, which is the operating direction of the switching valve of the flow path switching portion, is indicated by an arrow X, and the second direction orthogonal to the first direction X is indicated by an arrow Y. The third direction, which is the height direction of the pump and is orthogonal to both the first direction and the second direction, is indicated by an arrow Z.

As shown in FIG. 1, the electromagnetic pump 1 is one of gas pumps, and is configured as an air pump (hereinafter, also simply referred to as “pump”) that compresses and discharges air as a gas.

The pump 1 includes a pump main body 10 that compresses and discharges air, and a flow path switching unit 30 that switches the flow path of the compressed air compressed by the pump main body 10.

The pump main body 10 is arranged above the flow path switching section 30 in the third direction Z. The flow path switching portion 30 includes a partition member 30a interposed between the pump main body 10 and the pump main body 10 in order to partition the pump main body 10 and the tank 31. The partition member 30a is made of a flat metal material. The partition member 30a is provided with a pair of through holes 30b and 30b which are formed through in the plate thickness direction.

The component 10a of the pump main body 10 is housed in the casing 11 and mounted on the base plate 3. The base plate 3 is fastened and fixed to the tank 31 of the flow path switching portion 30 together with the partition member 30a by the screw member 5. The pump body 10 is covered from above by the cover 2. The cover 2 is fixed to the tank 31 by the screw member 6. The tank 31 is a metal housing made of a metal material such as aluminum.

The pump main body 10 includes a pair of discharge chambers 18 and 18, and is configured such that the compressed air discharged from each discharge chamber 18 flows into the tank 31 through the through hole 30b of the partition member 30a. As a result, compressed air flows from the pump main body 10 into the tank 31 of the flow path switching unit 30. The tank 31 functions to temporarily retain the compressed air.

As shown in FIGS. 1 and 2, the flow path switching unit 30 includes a tank 31 and a switching valve 44.

The tank 31 has an inflow chamber 32 in which compressed air flows in from the discharge chamber 18 of the pump main body 10, two outlets 35 and 38, and two outlets 35 and 38 from the inflow chamber 32, respectively. It has two flow paths P1 and P2 for flowing into. According to the first flow path P1, the compressed air flowing into the inflow chamber 32 sequentially passes through the first chamber 33 and the second chamber 34 and flows out from the outflow port 35. On the other hand, according to the second flow path P2, the compressed air flowing into the inflow chamber 32 sequentially passes through the third chamber 36 and the fourth chamber 37 and flows out from the outflow port 38.

The tank 31 is provided with a communication opening 33b in the third wall portion 33a that separates the first chamber 33 and the second chamber 34. Therefore, the compressed air that has flowed into the first chamber 33 is configured to flow into the second chamber 34 through the communication opening 33b of the third wall portion 33a. Further, the tank 31 is provided with a communication opening 36b in the fourth wall portion 36a that separates the third chamber 36 and the fourth chamber 37. Therefore, the compressed air that has flowed into the third chamber 36 is configured to flow into the fourth chamber 37 through the communication opening 36b of the fourth wall portion 36a.

The tank 31 is provided with a first valve seat 41 on a first partition wall 32a that separates the inflow chamber 32 and the first chamber 33. Further, the tank 31 is provided with a second valve seat 42 on the second partition wall 32b that separates the inflow chamber 32 and the third chamber 36. The first valve seat 41 includes a communication hole 41a for communicating the inflow chamber 32 and the first chamber 33. The second valve seat 42 includes a communication hole 42a for communicating the inflow chamber 32 and the third chamber 36.

A switching valve (valve body) 44 fixed to a long-axis rod 43 is arranged between the first valve seat 41 and the second valve seat 42. The switching valve 44 functions to perform a flow path switching operation for compressed air by a linear motion so that the inflow chamber 32 of the tank 31 communicates with any one of the two flow paths P1 and P2.

In order to achieve this function, the switching valve 44 has either one of the communication hole 41a of the first valve seat 41 and the communication hole 42a of the second valve seat 42 when the rod 43 reciprocates in the first direction X. It is configured to close and seal. Therefore, the compressed air that has flowed into the inflow chamber 32 of the tank 31 flows into any one of the two flow paths P1 and P2 by the flow path switching operation of the switching valve 44.

The flow path switching unit 30 includes a solenoid 50 and a spring member 60 as elements for reciprocating the rod 43 to which the switching valve 44 is fixed in the first direction X.

As shown in FIG. 2, the spring member 60 is a so-called "tension coil spring", one end of which is connected to one end 43a of the rod 43, and the other end is fixed to the fixing pin 33c on the tank 31 side. Has been done. Therefore, the rod 43 is always elastically urged by the spring member 60 in the direction approaching the fixing pin 33c.

The solenoid 50 is arranged in the solenoid chamber 39 of the tank 31. The solenoid 50 is a solenoid actuator that operates when power is supplied from an AC power source (not shown) to cause a reciprocating operation of the switching valve 44 in the first direction X, that is, a flow path switching operation by an electromagnetic force. The solenoid 50 is configured as a direct-acting solenoid (electromagnet) that converts electrical energy into linear mechanical motion.

As shown in FIG. 3, the solenoid 50 has a coil around which a copper wire is wound (not shown), a fixed iron core 51 fixed to the tank 31, and a straight line in the first direction X with respect to the fixed iron core 51. It is provided with a movable iron core 52 that can be operated in a positive manner.

The fixed iron core 51 has a resin mold structure in which a laminate of a plurality of metal plates made of a magnetic material such as iron is molded with resin. The fixed iron core 51 includes a space 51a extending inside the fixed iron core 51 in the first direction X.

Like the fixed iron core 51, the movable iron core 52 is made of a magnetic material such as iron. The movable iron core 52 includes an insertion portion 53 inserted into the space 51a of the fixed iron core 51 and a contact portion 54 provided at one end of the insertion portion 53, and the rod 43 is provided at the contact portion 54. It is connected to the other end 43b.

As shown in FIGS. 3 and 4, a first insulating member 55 is provided between the fixed iron core 51 and the tank 31. The first insulating member 55 is made of a resin material and has vibration insulation and electrical insulation. The first insulating member 55 includes a first flat plate portion 55a and a second flat plate portion 55c extending in directions orthogonal to each other.

The term "having vibration insulation" as used herein means that the function of preventing the propagation of vibration is excellent (vibration is difficult to be transmitted). Further, the term "having electrical insulation" as used herein means that the function of preventing energization is excellent (it is difficult for current to pass through).

The first flat plate portion 55a of the first insulating member 55 has a flat plate shape extending on a plane defined by both the first direction X and the second direction Y. The second flat plate portion 55c has a flat plate shape extending on a plane defined by both the second direction Y and the third direction Z.

The first flat plate portion 55a is provided with locking portions 55b on both sides in the second direction Y in order to lock the fixed iron core 51 of the solenoid 50. Each of the pair of locking portions 55b and 55b has a claw shape that can be bent and deformed so as to be separated from each other in the second direction Y. Therefore, when the fixed iron core 51 is pressed against the first flat plate portion 55a so as to flex and deform each of the locking portions 55b, the fixed iron core 51 is deformed and deformed toward the original position. It is locked by the locking portions 55b and 55b and integrated with the first insulating member 55. In this case, it can be said that "the first insulating member 55 is locked to the fixed iron core 51 via a pair of locking portions 55b, 55b."

The first insulating member 55 is configured to be fixed to the tank 31 by a screw member 56 in the first flat plate portion 55a. At this time, the fixed iron core 51 is temporarily fixed to the tank 31. In a state where the first insulating member 55 is fixed to the tank 31 together with the fixed iron core 51, the first insulating member 55 is arranged between the lower surface 51b of the fixed iron core 51 and the bottom wall portion 39a forming the bottom surface of the solenoid chamber 39. On the other hand, the second flat plate portion 55c is arranged between the side surface 51c of the fixed iron core 51 and the side wall portion 39b forming the side surface of the solenoid chamber 39.

A second insulating member 57 is adhered to the upper surface 51d of the fixed iron core 51. As a result, in the state where the partition member 30a is attached to the tank 31, the second insulating member 57 is interposed between the upper surface 51d of the fixed iron core 51 and the lower surface 30c of the partition member 30a. The second insulating member 57 is made of a rubber material, and has vibration insulation and electrical insulation like the first insulation member 55. The second insulating member 57 has a flat plate shape extending on a plane defined by both the first direction X and the second direction Y, and has a lower surface 51b of the fixed iron core 51 and a bottom wall portion 39a of the tank 31. Placed between.

Further, although not particularly shown, a packing for sealing is provided in the region between the second insulating member 57 and the partition member 30a, that is, on the upper surface of the tank 31, so that air leaks to the outside of the tank 31 and the tank 31 Air leakage between the rooms inside is blocked.

In a state where the base plate 3 is fixed to the tank 31 together with the partition member 30a by the screw member 5, the fastening axial force by the screw member 5 acts in the third direction Z. As a result, the partition member 30a is pressed against the fixed iron core 51 via the second insulating member 57. Further, the fixed iron core 51 is pressed against the bottom wall portion 39a of the tank 31 via the first flat plate portion 55a of the first insulating member 55. At this time, the fixed iron core 51 is sandwiched between the tank 31 and the partition member 30a with the insulating members 55 and 57 interposed above and below the third direction Z. The fixed iron core 51 is fixed to the tank 31 by this holding force.

In this case, the bottom wall portion 39a of the tank 31 and the partition member 30a are arranged on both sides of the solenoid 50 in the intersecting direction (third direction Z) intersecting the linear motion direction of the switching valve 44 (first wall). The part and the second wall part) are composed. Then, the solenoid 50 has a first flat plate portion 55a of the first insulating member 55 interposed between the bottom wall portion 39a as the first wall portion and a partition member 30a as the second wall portion. The second insulating member 57 is interposed and fixed to the tank 31 in a state of being sandwiched between the first wall portion and the second wall portion in the crossing direction. That is, the solenoid 50 is fixed to the tank 31 in a state of being pressed via the two insulating members 55 and 57. In this case, both the first wall portion and the second wall portion are configured as a metal wall portion made of a metal material.

Further, with the solenoid 50 fixed to the tank 31, the fixed iron core 51 abuts on the side wall portion 39b of the tank 31 via the second flat plate portion 55c of the first insulating member 55 in the first direction X. It is configured.

In the solenoid 50 having the above configuration, a magnetic field is generated in the center of the coil by the power supply from the AC power supply. At this time, the solenoid 50 is operated by the magnetized fixed iron core 51 attracting the movable iron core 52. The movable iron core 52 is configured so that when the solenoid 50 is operated, the insertion portion 53 is sucked in the direction of being inserted into the space 51a.

Therefore, when the solenoid 50 is operated, the movable iron core 52 overcomes the elastic urging force of the spring member 60 and is attracted to the fixed iron core 51, and is attracted to the suctioned surface 51e of the fixed iron core 51 at the contact portion 54. As a result, the rod 43 moves in the direction closer to the solenoid 50 in the first direction X, and the communication hole 42a of the second valve seat 42 is sealed by the switching valve 44 (see FIG. 5). As a result, the compressed air that has flowed into the inflow chamber 32 is blocked from flowing into the third chamber 36, and flows out from the outflow port 35 only through the first flow path P1.

On the other hand, the solenoid 50 is put into a non-operating state by temporarily stopping the power supply from the AC power source. At this time, the movable iron core 52 is configured such that the insertion portion 53 is inserted from the space 51a according to the elastic urging force of the spring member 60. Therefore, the movable iron core 52 is pulled only according to the elastic urging force of the spring member 60 when the solenoid 50 is not operated. As a result, the rod 43 moves in the direction away from the solenoid 50 in the first direction X, and the communication hole 41a of the first valve seat 41 is sealed by the switching valve 44 (see FIG. 6). As a result, the compressed air that has flowed into the inflow chamber 32 is blocked from flowing into the first chamber 33, and flows out from the outflow port 38 only through the second flow path P2.

By the way, since the current of the AC power supply for the solenoid 50 changes periodically, it is known that the attractive force of the movable iron core 52 with respect to the fixed iron core 51 also periodically increases and decreases accordingly. This increase or decrease in suction force can be a factor in generating noise peculiar to the AC solenoid. This noise is a sound generated by resonating with the frequency of an alternating current, and is called a "beating sound".

Therefore, in order to suppress the generation of this roaring sound, a shading coil (bearing coil) 58 for preventing an increase or decrease in the suction force is incorporated in the fixed iron core 51. The shading coil 58 has a known structure, and a detailed description thereof will be omitted. However, by synthesizing a suction force that is 90 degrees out of phase with the suction force of the fixed iron core 51, the suction force becomes zero. It fulfills the function of eliminating the moment.

However, when the surface to be attracted 51e of the fixed iron core 51 and the exposed surface 58a of the shading coil 58 are low in smoothness, it is difficult to suppress the generation of roaring noise (noise). On the other hand, if the processing accuracy of the suctioned surface 51e of the fixed iron core 51 and the exposed surface 58a of the shading coil 58 is improved, the product cost of the pump 1 itself becomes high.

Therefore, in the flow path switching unit 30 of the present embodiment, the solenoid 50 is configured to be fixed to the tank 31 in a state of being pressed via two insulating members 55 and 57 having vibration insulation. There is. According to this configuration, the vibration generated when the solenoid 50 is operated is absorbed by the insulating member having vibration insulation by 55,57. As a result, the generation of growl noise by the solenoid 50 is suppressed.
Further, by using the insulating members 55 and 57, for example, in order to suppress the generation of beat noise as compared with the case where the surface to be attracted 51e of the fixed iron core 51 and the exposed surface 58a of the shading coil 58 are processed with high accuracy. The cost required for the structure can be kept low.

Further, according to the flow path switching unit 30 of the present embodiment, the solenoid 50 can be easily fixed to the tank 31 by utilizing the force of sandwiching the solenoid 50 between the bottom wall portion 39a of the tank 31 and the partition member 30a. At this time, since the direction in which the bottom wall portion 39a of the tank 31 and the partition member 30a sandwich the solenoid 50 (third direction Z) intersects the linear motion direction of the switching valve 44 (first direction X), the solenoid 50 is used. The pinching force is low.

Further, according to the flow path switching unit 30 of the present embodiment, the solenoid 50 is fixed to the tank 31 by utilizing the fastening force for fastening the partition member 30a to the tank 31 by the screw member 5. That is, the solenoid 50 is not fixed to the tank 31 by a screw member or the like. In this case, the work of fastening the partition member 30a to the tank 31 also serves as the work of fixing the solenoid 50 to the tank 31. As a result, the structure in which the solenoid 50 itself is directly fixed to the tank 31 by a screw member or the like can be omitted.
Further, when the solenoid 50 is out of order or inspected, the solenoid 50 can be easily removed from the tank 31 by releasing the pinching of the solenoid 50.

Further, according to the flow path switching unit 30 of the present embodiment, the electrical insulation of the solenoid 50 can be enhanced by using the insulating members 55 and 57. That is, the solenoid 50 has a double insulation structure in which an additional electrical insulation structure is added to the original basic electrical insulation structure. Specifically, the first insulating member 55 is interposed between the fixed iron core 51 of the solenoid 50 and the metal tank 31, and the second insulating member 55 is interposed between the fixed iron core 51 of the solenoid 50 and the metal partition member 30a. An insulating member 57 is interposed.

The "basic electrical insulation structure" here means an insulation structure for providing basic protection against electric shock. On the other hand, the "additional electrical insulation structure" referred to here refers to an insulation structure for protecting against electric shock when the basic electrical insulation structure is destroyed.

Since the solenoid 50 has a double insulating structure in this way, it is possible to eliminate the ground generally attached to the metal tank 31.

Further, according to the flow path switching unit 30 of the present embodiment, when the solenoid 50 is fixed to the tank 31, the solenoid 50 is integrated with the first insulating member 55 in advance by the locking portion 55b of the first insulating member 55. Can be made. As a result, it is not necessary to assemble the solenoid 50 and the first insulating member 55 individually, and the work of assembling the solenoid 50 and the first insulating member 55 becomes easy.

Further, according to the flow path switching unit 30 of the present embodiment, the product cost of the pump 1 can be kept low by using a general-purpose resin material or a rubber material for the insulating members 55 and 57.

Next, the details of the pump main body 10 of the pump 1 will be described with reference to FIGS. 7 to 9.

As shown in FIG. 7, a pair of solenoids 12 and 12 as a driving unit are housed in the casing 11 of the pump main body 10. In the gap 12a between the pair of solenoids 12, 12, the oscillator 13 is arranged so as not to come into contact with the pair of solenoids 12, 12. The oscillator 13 has permanent magnets (N pole and S pole) 13a and 13b having different polarities from each other.

A disk-shaped plate member 14 is attached to each of both ends of the vibrator 13. The plate member 14 is fixed to the casing 11 via a disk-shaped diaphragm 14a. Therefore, the oscillator 13 is indirectly connected to the diaphragm 14a via the plate member 14. The diaphragm 14a is formed of an elastically deformable rubber material for performing an air suction operation and an air discharge operation, and is configured to elastically deform according to the reciprocating vibration of the plate member 14.

The pair of solenoids 12, 12 are attached to the vibrator 13 so that the vibrator 13 elastically deforms the diaphragm 14a and reciprocates in the first direction X due to the electromagnetic force generated when power is supplied from the AC power supply (not shown). It functions to apply electromagnetic force.

A valve case body 11a is provided on the outer side of each plate member 14 in the casing 11. The valve case body 11a includes a compression chamber 15, a suction chamber 16, and a discharge chamber 18. The suction chamber 16 is a space for sucking air outside the pump as suction air from a suction port (not shown). The compression chamber 15 is a space for compressing the intake air sucked from the suction chamber 16 through the suction valve 17. The discharge chamber 18 is a space for discharging the compressed air compressed by the compression chamber 15 through the discharge valve 19.

In the pump main body 10 having the above configuration, when the vibrator 13 reciprocates in the first direction X due to a change in polarity when the pair of solenoids 12 and 12 are energized, each diaphragm 14a is displaced in the same manner as the stroke of the vibrator 13. It elastically deforms in the first direction X by the amount.

As shown in FIG. 8, when the right diaphragm 14a is elastically deformed to the left during a stroke in one direction (arrow X1) of the vibrator 13, the right compression chamber 15 becomes a negative pressure. Due to this negative pressure, the discharge valve 19 on the right side is closed and the suction valve 17 on the right side is opened, so that air is sucked from the suction chamber 16 on the right side to the compression chamber 15 on the right side (suction operation).

Further, when the diaphragm 14a on the left side is elastically deformed to the left during a stroke in one direction (arrow X1) of the vibrator 13, air is pressurized in the compression chamber 15 on the left side. Since the suction valve 17 on the left side is closed and the discharge valve 19 on the left side is opened by this pressurization, compressed air is discharged from the compression chamber 15 on the left side to the discharge chamber 18 on the left side (discharge operation). ..

On the other hand, as shown in FIG. 9, when the left diaphragm 14a is elastically deformed to the right when the oscillator 13 is stroked in the other direction (arrow X2), the left compression chamber 15 becomes negative pressure. Become. Since the left discharge valve 19 is closed and the left suction valve 17 is opened by this negative pressure, air is sucked from the left suction chamber 16 into the left compression chamber 15 (suction operation).

Further, when the diaphragm 14a on the right side is elastically deformed to the right when the vibrator 13 is stroked in the other direction (arrow X2), air is pressurized in the compression chamber 15 on the right side. Since the suction valve 17 on the right side is closed and the discharge valve 19 on the right side is opened by this pressurization, compressed air is discharged from the compression chamber 15 on the right side to the discharge chamber 18 on the right side (discharge operation). ..

By alternately repeating the suction operation and the discharge operation as described above, compressed air having a predetermined pressure and flow rate is continuously discharged from the pump main body 10 toward the tank 31 of the flow path switching section 30.

For a more detailed structure of the pump body 10, refer to the air supply device disclosed in Japanese Patent No. 4405171, the electromagnetic pump disclosed in Japanese Patent No. 4564817, and the electromagnetic pump disclosed in Japanese Patent No. 4606189. Will be done.

As shown in the above embodiment, in the electromagnetic pump 1 using the diaphragm 14a, the generation of noise by the solenoid 50 of the flow path switching unit 30 can be suppressed at low cost.

The present invention is not limited to the above-mentioned typical embodiments, and various applications and modifications can be considered as long as the object of the present invention is not deviated. For example, the following embodiments to which the above embodiments are applied can also be implemented.

In the above embodiment, the case where the AC solenoid is adopted as the solenoid 50 for driving the switching valve 44 has been illustrated, but a DC solenoid can be adopted instead of the AC solenoid. In the case of the DC solenoid as well, as in the case of the AC solenoid, it is possible to suppress the generation of noise when the movable iron core 52 vibrates in a state of being adsorbed on the adsorption surface 51e of the fixed iron core 51.

In the above embodiment, the case where the solenoid 50 and the spring member 60 which is a tension coil spring are combined to drive the switching valve 44 has been illustrated, but instead, the solenoid 50 and the compression coil spring are combined to drive the switching valve 44. Alternatively, a structure for driving the switching valve 44 can be adopted by combining a plurality of solenoids.

In the above embodiment, the case where the two wall portions sandwiching the solenoid 50 in the crossing direction intersecting the linear motion direction of the switching valve 44 is composed of the partition member 30a and the bottom wall portion 39a of the tank 31 has been illustrated. These two wall portions can also be formed by a portion different from the partition member 30a and the bottom wall portion 39a.
Further, it is also possible to adopt a configuration in which the two wall portions sandwich the solenoid 50 in a direction different from the above-mentioned crossing direction (for example, a direction along the linear motion direction of the switching valve 44).

In the above embodiment, the case where the solenoid 50 is not fixed to the tank 31 by a screw member or the like has been illustrated, but instead, the solenoid 50 is pressed against the tank 31 via an insulating member having vibration insulation. In this state, a structure in which the solenoid 50 is fastened and fixed to the tank 31 by a screw member can also be adopted. In this case, it is preferable to use a non-conductive screw member in order to perform additional electrical insulation of the solenoid 50.

In the above embodiment, the case where the partition member 30a and the tank 31 are both made of a metal material has been illustrated, but instead, at least one of the partition member 30a and the tank 31 can be made of a resin material. .. In this case, the insulating member (additional electrical insulating structure) provided for the element made of the resin material can be omitted. For example, when the partition member 30a is made of a resin material, the second insulating member 57 can be omitted from the two insulating members 55 and 57, and only the first insulating member 55 can be used. Further, when the tank 31 is made of a resin material, the first insulating member 55 can be omitted from the two insulating members 55 and 57, and only the second insulating member 57 can be used.

In the above embodiment, the case where the first insulating member 55 is made of a resin material and the second insulating member 57 is made of a rubber material has been illustrated, but the first insulating member 55 is made of a resin material or a rubber material and A structure in which the second insulating member 57 is made of a resin material or a rubber material can be adopted.

In the above embodiment, the case where the insulating members 55 and 57 having both vibration insulation and electrical insulation are used has been illustrated, but the tank 31 and the partition member 30a which may be electrically connected to the solenoid 50 have been illustrated. When is made of a non-conductive material, an insulating member having vibration insulation but not electrical insulation can be adopted instead of the insulating members 55 and 57.

Further, instead of the insulating members 55 and 57 made of a resin material or a rubber material, a vibration insulating material such as felt, a vibration damping steel plate, and a vibration absorbing material such as an asphalt sheet can be adopted. Further, instead of or in addition to the insulating members 55 and 57, an elastically deformable member such as a spring member or a damper member may be used to suppress the vibration of the solenoid 50.

In the above embodiment, the first insulating member 55 provided with the locking portion 55b for locking the solenoid 50 has been illustrated, but the locking portion 55b of the first insulating member 55 may be omitted if necessary. You can also. In this case, the first insulating member 55 may be configured to be fixed to the solenoid 50 in advance by adhesion and assembled to the tank 31 together with the solenoid 50, or may be separated from the solenoid 50 and before the solenoid 50. It may be configured to be assembled to the tank 31.

In the above embodiment, the structure in which the second insulating member 57 is adhered to the solenoid 50 has been illustrated, but instead of this structure, the partition member 30a and the tank 31 without the second insulating member 57 being adhered to the solenoid 50. It is also possible to adopt a structure sandwiched between and. Alternatively, the second insulating member 57 may be provided with a locking portion similar to the locking portion 55b of the solenoid 50, and the second insulating member 57 and the solenoid 50 may be integrated via the locking portion.

In the above embodiment, the pump main body 10 that compresses air by using the electromagnetic force of the solenoid 12 has been illustrated, but instead of the pump main body 10, air is supplied by using an actuator such as a motor or a power cylinder. A pump body that compresses can also be adopted.

In the above embodiment, the pump 1 in which the plate member 14 and the diaphragm 14a are attached to both ends of the vibrator 13 is illustrated, but the plate member 14 and the diaphragm 14a are attached only to one end of the vibrator 13. May be good.

In the above embodiment, the case where the inflow chamber 32 of the tank 31 communicates with any one of the two flow paths P1 and P2 by the flow path switching operation of the switching valve 44 is illustrated, but the number of flow paths is large. The route is not limited to two, and three or more routes can be adopted.

In the above embodiment, the pump 1 that compresses and discharges air, which is one of the gases, has been illustrated, but the structure of this pump 1 is a gas other than air, for example, combustion gas (propane, hydrogen gas, etc.), non-combustible. It can also be applied to the structure of a gas pump that compresses and discharges a gas such as gas (nitrogen gas, helium gas, etc.).

1 Electromagnetic pump (gas pump)
5 Screw member 10 Pump body 12 Solenoid (drive)
13 Oscillator 13a, 13b Permanent magnet 14a Diaphragm 30 Flow path switching part 30a Partition member (second wall part)
31 Tank 32 Inflow chamber 35, 38 Outlet 39a Bottom wall (first wall)
44 Switching valve 50 Solenoid 55 First insulating member (insulating member)
55b Locking part 57 Second insulating member (insulating member)
P1 1st flow path (flow path)
P2 Second flow path (flow path)

Claims (5)

A gas pump including a pump main body that compresses and discharges gas, and a flow path switching unit that switches the flow path of the compressed gas compressed by the pump main body.
The flow path switching unit
It has an inflow chamber into which the compressed gas flows from the pump main body, a plurality of outlets, and a plurality of flow paths for allowing the compressed gas to flow from the inflow chamber to each of the plurality of outlets. With the tank
A switching valve that performs a flow path switching operation for the compressed gas so that the inflow chamber of the tank communicates with any one of the plurality of flow paths.
A solenoid that causes the flow path switching operation of the switching valve by electromagnetic force and is fixed to the tank in a state of being pressed via an insulating member having vibration insulation.
Equipped with a,
The flow path switching portion includes a first wall portion and a second wall portion arranged on both sides of the solenoid in an intersecting direction intersecting the linear motion direction of the switching valve, and the first wall portion is the bottom of the tank. It is configured as a wall portion, and the second wall portion is configured as a partition member that separates the pump main body portion and the tank.
The solenoid has the partition member in a state where the insulating member is interposed between the bottom wall portion and each of the partition members and is sandwiched between the bottom wall portion and the partition member in the crossing direction. A gas pump that is fixed to the tank by using the fastening force that is fastened to the tank by a screw member . At least one of the bottom wall portion and the partition member is configured as a metal wall portion made of a metal material, and the insulating member interposed between the metal wall portion and the solenoid is vibrationally insulated and electrically insulated. have both sexes, gas pump according to claim 1. The gas pump according to claim 1 or 2 , wherein the insulating member includes a locking portion for locking the solenoid. The gas pump according to any one of claims 1 to 3 , wherein the insulating member is made of a resin material or a rubber material. The pump main body includes a diaphragm that can be elastically deformed to perform suction and discharge operations of the gas, a vibrator having a permanent magnet and connected to the diaphragm, and the vibrator elastically deforming the diaphragm. The gas pump according to any one of claims 1 to 4 , further comprising a drive unit that applies an electromagnetic force to the vibrator so as to reciprocally vibrate.

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