JPH0413430Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cooling ventilation circuit for a moving magnet diaphragm pump. For more information, see the independent 2
This invention relates to an improvement in the cooling ventilation circuit of a diaphragm pump, which improves cooling efficiency by providing a system ventilation circuit.

[Prior Art] Generally, a movable magnet type diaphragm pump has a configuration as shown in FIG. That is, an electromagnetic coil 1 that has a substantially cylindrical shape and is used to create an alternating magnetic field by passing an alternating current, and a bar-shaped vibrator 26 that includes a permanent magnet 24 that is inserted into the electromagnetic coil 1. , diaphragms 8 and 9 that support both ends of the vibrator 26 and perform a pumping action by the vibration of the vibrator, and casing members 10 and 11 that together with the diaphragm constitute an operating chamber.

In order to remove and cool the heat generated in the electromagnetic coil 1 in the diaphragm pump having such a configuration,
Forced ventilation cooling circuits, such as the one shown in FIG. 5, have been known for some time.

This device has a ventilation hole 52 formed in the partition walls such as the bobbin 2, diaphragm stand 51, and side plate 6 inside the pump.
As shown in FIG. This configuration has a cooling ventilation circuit. That is, this device attempts to forcefully ventilate and cool the inside of the room R by passing air from outside into the room R by the suction action of the two diaphragms 8 and 9 that occur alternately.

[Problems to be solved by the invention] When the inside of the pump is treated as one chamber as shown in Fig. 5, the two diaphragms 8 and 9 are driven alternately as shown in Fig. 6. Accordingly, the direction of air flow changes every half cycle. That is, in a half cycle in which the vibrator 26 moves in the direction of the arrow A, air drawn into the room R from the outside through the communication hole 53 flows into one casing member 10.
In the next half cycle of moving in the direction of arrow B, the cycle in which the air in the room R is sucked into the suction chamber 15 of the other casing member 11 is repeated.

In that case, from the communication hole 53 to the casing member 1
The air sucked into the suction chambers 14 and 15 of Nos. 0 and 11 is mainly the air around the shortest flow path.
The air Y that is far from the shortest flow path simply changes its direction of movement, and no actual flow occurs. In other words, it is the same phenomenon as when you pour water into a bucket and shake it. Therefore, in the conventional ventilation circuit, there is a problem in that air stagnates at a position far from the ventilation path, and a sufficient circulating cooling effect cannot be obtained.
Furthermore, in the pump proposed by the present applicant that has a vibrator with permanent magnets separated at both ends (see Japanese Patent Application No. 61-208423 (Japanese Unexamined Patent Publication No. 63-65182), etc.), the center of the electromagnetic coil is Since there are many hollow parts, the thermal conductivity is low. Moreover, the air flow resistance is large in the center, so air cannot flow sufficiently.
There is a problem that heat accumulates and becomes high temperature.

This invention is a cooling ventilation circuit that can efficiently cool the heat generated from the electromagnetic coil by eliminating air stagnation inside the diaphragm pump, and in particular can cool the center of the pump to the same extent as the outer circumference. The purpose is to configure the

[Means for Solving the Problems] The cooling ventilation circuit for a movable magnet diaphragm pump of the present invention is a cooling ventilation circuit for a movable magnet diaphragm pump having two diaphragms and a suction chamber. A first ventilation circuit that passes through the pump and reaches one suction chamber, and a second ventilation circuit that runs from the outside through the inside of the pump to the other suction chamber are configured independently of each other, and the first ventilation circuit is connected to the electromagnetic coil. The electromagnetic coil is characterized in that the second ventilation circuit is an external ventilation circuit that passes through a cavity formed in the outer circumference, and the second ventilation circuit is an internal ventilation circuit that passes through a space formed in the inner circumference of the electromagnetic coil. This configuration particularly improves the cooling effect inside the electromagnetic coil.

[Function] A part of the pump that communicates with one suction chamber (for example, a part outside the electromagnetic coil) reaches that part from the outside when negative pressure is generated in that suction chamber by the diaphragm on that side, Furthermore, air is always forcedly cooled by flowing in one direction without stagnation through the first ventilation circuit that reaches the suction chamber. Note that one flow always moves air at a flow rate that corresponds to the cross-sectional area of the flow path, so no stagnation occurs.

On the other hand, a part of the pump that communicates with the other suction chamber (for example, the inner part of the bobbin of the electromagnetic coil) is connected to that part of the pump from the outside when negative pressure is generated in the other suction chamber, Furthermore, air is forced to cool by flowing in one direction through an internal ventilation circuit that reaches the suction chamber.

Therefore, the inner part of the electromagnetic coil bobbin, where air tends to stagnate, is also reliably cooled by the independent ventilation circuit, which has the advantage of being efficiently cooled.

In other words, the present invention uses both diaphragms of a movable magnet diaphragm pump equipped with two diaphragms to construct two independent ventilation circuits that each flow in only one direction. This improves the cooling efficiency inside the coil.

[Example] Next, a cooling ventilation circuit of the present invention will be described with reference to the drawings.

Fig. 1 is a longitudinal sectional view showing an embodiment of a diaphragm pump equipped with a ventilation circuit of the present invention, Fig. 2 is a block diaphragm of the ventilation circuit shown in Fig. 1, and Fig. 3 is a ventilation circuit shown in Fig. 1. Action explanatory diagram, 4th
The figure is a schematic perspective view showing another embodiment of the ventilation circuit of the present invention.

In FIG. 1, 1 is an electromagnetic coil wound around a bobbin 2 made of synthetic resin. Yoke core plates 3 are further arranged at both ends of the bobbin 2.

The outer periphery of the electromagnetic coil 1 is surrounded by a cylindrical yoke core 4 with some gap. Therefore, a substantially airtight space surrounded by the bobbin 2 and the yoke core 4 is configured as an outer chamber 5.

Side plates 6 and 7 are fitted to both ends of the yoke core 4, respectively, and casing members 10 and 11 are attached to the outside of the side plates 6 and 7 with diaphragms 8 and 9 interposed therebetween, respectively. The casing members 10 and 11 constitute working chambers 12 and 13 between them and the diaphragms 8 and 9, as well as suction chambers 14 and 15 and discharge chambers 16 and 1.
7. Suction chambers 14, 15 and working chamber 1
Suction valves 18 and 19 are provided between 2 and 13,
Discharge valves 20 and 21 are provided between the discharge chambers 16 and 17 and the working chambers 12 and 13.

The interior space S1 of the bobbin 2 and the spaces S2 and S3 surrounded by the yoke core plate 3, the side plates 6 and 7, and the diaphragms 8 and 9 constitute a substantially airtight interior chamber 22 as a whole.

Note that the inner chamber 22 has a diaphragm 8 at both ends,
A vibrator 26 is provided which includes a support shaft 23 fixed to the yoke core plate 9 and permanent magnets 24 and 25 arranged at a portion facing the inner periphery of the yoke core plate 3.

The interior chamber 22 configured as described above communicates with the outside through a communication hole 27 configured as a groove or a hole passing through the side plate 6 and the yoke core 4 on the left side of the drawing in FIG. It communicates with the suction chamber 15 through a ventilation passage 28 passing through the right side plate 7 and the casing member 11 .

On the other hand, the outer chamber 5 communicates with the outside through a communication hole 29 formed in the yoke core 4, and is communicated with the outside through a ventilation passage 30 that passes through the bobbin 2, the left yoke core plate 3, the side plate 6, and the casing member 10. It communicates with the suction chamber 14 on the left side.

Note that the ventilation passages 30 and 28 communicating with the respective suction chambers 14 and 15 are preferably provided on the upper side of the pump, since the air whose temperature has increased is accumulated in the upper part of the inside of the pump. On the other hand, the communication holes 27 and 29 with the outside are shown as opening downward and upward, respectively, for convenience in the drawing.
In particular, in order to actively exchange the air above the inside of the pump, it is preferable to open on the side of the pump as shown in FIG. 3, for example.

As mentioned above, in the pump shown in FIG. 1, as shown in FIG. 2, there is an external ventilation path that continues from the outside → the communication hole 29 → the outer chamber 5 → the ventilation path 30 → the left suction chamber 14, and the outside → the communication hole 27 → It is configured as a circuit in which two independent cooling ventilation circuits are provided in parallel, ie, the internal ventilation passage continues from the inner chamber 22 to the ventilation passage 28 to the suction chamber 15 on the right side.

Next, the operation of the cooling ventilation circuit constructed as described above will be explained.

Coil 1 and permanent magnets 24, 2 shown in FIG.
5 interaction causes the vibrator 26 to move to the right (direction of arrow A)
, the diaphragm 8 on the left side performs a suction action, and the diaphragm 9 on the right side performs a discharge action. At this time, the suction valve 18 opens due to the negative pressure generated in the left working chamber 12, and air from the suction chamber 14 is sucked in as shown by the broken arrow. Therefore, the air in the outer chamber 5 is also sucked into the suction chamber 14, and at the same time, air is sucked into the outer chamber 5 from the outside through the communication hole 29.

At that time, the right diaphragm 9 also moves in the direction of arrow A, but since the suction valve 19 is closed,
Even if the pressure inside the working chamber 13 increases, the suction chamber 1 on the right side
5 is not pressurized, and air does not flow back from the suction chamber 15 to the inner chamber 22. The air in the working chamber 13 is sent through the discharge valve 21 into the tank T shown in FIG. Note that the tank T has both working chambers 12 and 1.
This is to smooth out the airflow that is sent alternately and intermittently from 3.

Air entering from the outside through the communication hole 29 enters the cylindrical outer chamber 5 as shown by the white arrow P in FIG. The air is sucked into the suction chamber 14 through the air passage 30.

Next, when the vibrator 26 moves to the left (in the direction of arrow B), the diaphragm 9 on the right side performs a suction action, and the diaphragm 8 on the left side performs a discharge action.
Therefore, based on the negative pressure generated in the working chamber 13 on the right side, air from the outside flows through the communication hole 27 as shown by the solid line arrows in FIGS. 1 and 2 and the hatched arrow Q in FIG. The air passes through the air passageway 28 to reach the inner chamber 22, and is sucked into the suction chamber 15 on the right side through the air passage 28.

Note that since the left and right diaphragms 8 and 9 simultaneously move to the right or left, the internal volume of the inner chamber 22 itself does not change, so that suction from the outside into the inner chamber 22 is generated only by the negative pressure in the suction chamber 5. .

As mentioned above, the air in the outer chamber 5 is supplied to the inner chamber 22 through an external ventilation circuit driven by the diaphragm 8 on the left side.
The air inside the pump is forcibly ventilated and cooled by air flowing in only one direction in the internal ventilation circuit driven by the diaphragm 9 on the right side, so there is less air stagnation inside the pump and cooling can be done efficiently. It is done.

In the embodiment shown in FIGS. 1 to 3, the communication holes 27, 29
There is one ventilation passage 28, 30 each,
For example, as shown in Figure 4, there are two communication holes 27 and 29 for communication with the outside, and the number and position of the communication holes and ventilation channels are determined depending on the type of diaphragm pump and the amount of heat generated by the electromagnetic coil. Can be selected as appropriate.

[Effects of the invention] If the cooling ventilation circuit of the invention is adopted, air flows in only one direction through each independent ventilation circuit, so the portion where air stays inside the pump can be reduced. Thereby, for example, the efficiency of cooling and ventilation around the outer circumference of the coil and inside the coil bobbin can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of a diaphragm pump equipped with a ventilation circuit of the present invention, Fig. 2 is a block diagram of the ventilation circuit shown in Fig. 1, and Fig. 3 is a ventilation circuit shown in Fig. 1. Action explanatory diagram, 4th
The figure is a schematic perspective view showing another embodiment of the ventilation circuit of the present invention, FIG. 5 is a longitudinal sectional view showing an example of a diagram pump equipped with a conventional ventilation circuit, and FIG.
2 is a block diagram of the ventilation circuit shown in the figure. Main symbols in the drawing: 1... Electromagnetic coil, 5... Outer chamber, 8, 9... Diaphragm, 12, 13... Working chamber, 14, 15... Suction chamber, 24, 25... Permanent magnet, 26... ... Vibrator, 27, 29... Communication hole, 28, 30... Ventilation path.

Claims (1)

[Scope of utility model registration request] A cooling ventilation circuit for a movable magnet diaphragm pump having two diaphragms and a suction chamber, the first ventilation circuit leading from the outside through the inside of the pump to one suction chamber, and the first ventilation circuit leading from the outside through the inside of the pump to the other suction chamber. A second ventilation circuit leading to the chamber is configured independently of each other, the first ventilation circuit is an external ventilation circuit passing through a cavity formed in the outer periphery of the electromagnetic coil, and the second ventilation circuit A cooling ventilation circuit for a movable magnet diaphragm pump, characterized in that the internal ventilation circuit runs through a space formed in the inner circumference of a coil.