KR100641289B1 - Air pumping apparatus - Google Patents

Abstract

An air pumping apparatus is provided to certainly prevent a countercurrent phenomenon by installing a check valve at a second port side. In an air pumping apparatus, a valve body(31) has a first port(31a), a second port(31b), and an exhausting port(31c). A solenoid(33) is mounted in the valve body. A spring(37) is interposed between a plunger and the valve body. An air pump is connected to the first port. An air tank is connected to the second port. In a non-condition state, the plunger closes the second port and opens the first port and the exhausting port by the force of the spring. In a conduction state, the plunger closes the exhausting port and the opens the first and second ports by the electromagnetic force of the solenoid.

Description

Air pumping apparatus

1 is a perspective view showing an air pumping device for air compression according to a preferred embodiment of the present invention.

2 is a configuration diagram of FIG. 1.

3A and 3B are schematic diagrams showing an operating state of the solenoid valve at the time of non-energizing and energizing.

4 is a perspective view showing a case.

5 is a perspective view showing an air tank.

Figure 6 is a perspective view of the air pumping air pumping apparatus according to another embodiment of the present invention.

7 is a configuration diagram of FIG. 5.

<Description of the symbols for the main parts of the drawings>

10, 10a, 10b: air pump 20: case

30: solenoid valve 31: valve body

31a: first port 31b: second port

31c: exhaust port 33: solenoid

35: Plunger 37: Spring

50: check valve 70: air tank

80,180: pressure sensor 90: control unit

170: regulator

The present invention relates to an air pump that is easy to start, and more particularly, to an air pump that normally opens an air pump and an exhaust port during non-energization.

Air pumping devices are used in various industrial sites. Automakers use it for sealing (liquid metered discharge equipment) when assembling auto parts. Semiconductor factories and equipment companies use them for ejector replacement, static eliminators and liquid coating and sealing of PCBs or semiconductor components. In medical equipment companies such as dental supplies, it is used for pressure compressors and suction of dental compressors, and is also widely used for nail art (nail spray), body painting, computer cleaning, and model toy painting.

Among these air pumping devices, those disclosed in Korean Utility Model Publication No. 193-0019374 and Korean Patent Publication No. 2005-0004746 are proposed.

In the air pumping apparatus of these publications, the air compressor and the air collection chamber or the air compressor and the air tank are directly connected.

Therefore, the air is compressed in the air collecting chamber or the air tank, and a load is applied to the outlet side when the compressor is started, which makes it difficult to start, which causes a failure due to overload.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide an air pumping device having a structure capable of starting at a no-load state of atmospheric pressure despite its simple configuration.

Air pumping device of the present invention for achieving the above object is a valve body formed with a first port, a second port, exhaust port; A solenoid mounted in the valve body; plunger; A spring interposed between the plunger and the valve body; An air pump connected to the first port; An air tank connected to the second port; Consisting of,

The plunger closes the second port, opens the first port and the exhaust port by the force of the spring during non-energization,

The plunger closes the exhaust port and opens the first port and the second port by the electromagnetic force of the solenoid during energization.

According to another aspect of the present invention, an air pumping apparatus includes: a valve body having a first port, a second port, and an exhaust port; A solenoid mounted in the valve body; plunger; A spring interposed between the plunger and the valve body; An air pump connected to the first port; A regulator connected to the second port; Consisting of,

The plunger closes the second port, opens the first port and the exhaust port by the force of the spring during non-energization,

The plunger closes the exhaust port and opens the first port and the second port by the electromagnetic force of the solenoid during energization.

According to these configurations, since the first port is in a no-load state at atmospheric pressure connected to the exhaust port, it can be started smoothly during operation of the air pump.

In the above configuration, if the check valve is further provided on the second port side, the backflow phenomenon can be reliably prevented.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The term 'air pump' used in the present specification and claims is intended to include an air compressor in which air is compressed when the air is compressed, and an erect ball pump whose operation is opposite to that of the air compressor.

Example 1

1 is a perspective view showing an air pumping device for air compression according to a preferred embodiment of the present invention, Figure 2 is a schematic view of Figure 1, Figures 3a and 3b is a solenoid valve operating state when the non-energized and energized 4 is a perspective view illustrating a case, and FIG. 5 is a perspective view illustrating an air tank.

1 to 5, the air pumping air pumping apparatus according to the first embodiment is largely connected to the air compressor 10, the air tank 70, the air compressor 10 and the air tank 70 Is composed of a solenoid valve (30).

As shown in Fig. 3, the solenoid valve 30 has a valve body 31 including a first port (supply port) 31a, a second port (outlet) 31b, and an exhaust port (exhaust port) 31c. And a solenoid 33 attached to the valve body 31, a plunger 35, and a spring 37 interposed between the plunger 35 and the valve body 31.

The outlet 15b of the air compressor 10 is connected to the first port 31a, and the inlet 71 of the air tank 70 is connected to the second port 31b. The exhaust port 31c is open to the atmosphere.

With this configuration, as shown in Fig. 3A, during non-energization, the plunger 35 blocks the sheet of the second port 31b by the force of the spring 37, and the first port 31a. ) And the exhaust port 31c are opened. Then, the compressed air on the outlet 15b side flows out through the first port 31a to the exhaust port 31c (dashed arrow). Accordingly, the outlet 15b portion of the air compressor 10 is under an atmospheric pressure no-load state without compressed air.

In this no-load state, when energized, as shown in Fig. 3B, the plunger 35 blocks the sheet of the exhaust port 31c by the electromagnetic force of the solenoid 33, and the first port 31a and The second port 31b is opened to flow the compressed air into the air tank 70 (solid arrow).

In this way, the outlet 15b does not have compressed air and does not receive resistance to the start of the air compressor 10 so that it can be started smoothly. Accordingly, since there is no fear of overloading the motor, a large starting torque can be obtained even with a small motor, and compactness can be realized.

The air compressor 10 is composed of a motor 11 and a first pumping unit 13 and a second pumping unit 15 that receive power from the motor 11. The first pumping unit 13 and the second pumping unit 15 are series pumping units. That is, the outlet 13b of the first pumping part 13 is connected to the inlet 15a of the second pumping part 15. Therefore, the air sucked through the inlet 13a of the first pumping part discharges the compressed air through the outlet 15b via the inlet 15a of the outlet 13b and the second pumping part 15.

As such, the series air compressor 10 is preferable to maintain a constant pressure in the air tank 70 while being compact. Of course, the air compressor 10 in which the first pumping unit and the second pumping unit are connected in parallel is also possible.

The air compressor 10 and the solenoid valve 30 are preferably controlled by a control unit 90 such as a PCB. The control unit 90 is preferably applied to the pressure sensor 80 for sensing the pressure of the air tank 70 to control the air compressor 10 and the solenoid valve 30.

The air tank 70 is a tank for storing compressed air and maintaining a constant pressure. The air tank 70 is an inlet 71 connected to the outlet 15b, an outlet 73 that is a compressed air discharge port, and an outlet connected to the pressure sensor 80. 75). In particular, the inlet 71 or / and the outlet 73 is preferably in the form of the elbow of the letter 'b' rather than a straight line. This is because the noise caused by the compressed air of the air pump 10 and the noise caused by the resonance of the air tank 70 can be reduced by colliding at the elbow inlet 71 and the outlet 73.

On the other hand, by preventing the back flow of the compressed air of the air tank 70, the plunger 35 is implemented by blocking the seat of the second port (31b). In order to more reliably prevent this backflow, it is preferable to provide a check valve 50 between the second port 31b of the solenoid valve 30 and the air tank 70.

The air pumping apparatus described above is preferably mounted on the case 20 as shown in FIGS. 1 and 4.

The case 20 includes a front plate 21, a back plate 23, a bottom plate 25 connecting the front plate 21 and the back plate 23, and a front plate 21 and the back plate 23. The intermediate plate 27 is comprised. The intermediate plate 27 is a partition plate 27 that partitions the inside of the case 20 into upper and lower layers. The case 20 is covered with a cover (not shown) to form a main body.

The air compressor 10 is mounted on the partition plate 27, and the air tank 70 is mounted on the lower plate 25. Since the tower body has a two-layer structure, it is small in size and convenient to use in a limited space.

On the other hand, although the air tank 70 may be attached to the partition plate 27 and the air compressor 10 to the lower plate 25, condensation (water) may occur in the air tank 70 due to the temperature difference. This is because condensation is appropriately drained to the drain hole 26 of the lower plate 25. The drain screw is fastened to the drain hole 26, and if necessary, the drain screw may be loosened and drained.

In addition, it is preferable to secure a flow path for cooling the air compressor 10 in the case 20. That is, the back plate 23, the lower plate 25 and the partition plate 27 is preferably formed with through holes 23a, 25a, 27a for smooth air flow.

The through hole 23a is formed in a portion close to the air compressor 10, and a cooling fan 24 is preferably mounted in order to cool more forcibly. The through hole 27a is formed below the motor 10 portion of the air compressor 10 to further increase the cooling efficiency of the motor 11 that generates a lot of heat. These through holes 23a, 25a, and 27a may form one cooling flow passage to increase the cooling efficiency in the case 20. The cooling fan 24 is also preferably driven and controlled by the control unit 90.

The above description has described the case where the air pump is the air compressor 10. When the air pump is an erected air pump, the first port 31a is connected to the inlet of the erected air pump, and the second port 31b is connected to the outlet of the erected air tank.

In addition, the check valve 50 may be reversely provided to prevent intake of air from the second port 31b to the outlet of the hollow tank.

Example 2

6 is a perspective view showing an air compressor according to another preferred embodiment of the present invention, Figure 7 is a block diagram of FIG.

The air pumping device of the second embodiment is similar in structure and function to the air pumping device of the first embodiment, but differs in that the regulator 170 is used instead of the air tank 70.

6 and 7, the air pumping air pumping apparatus according to the second embodiment is largely the solenoid connecting the air compressor 100, the regulator 170, the air compressor 100 and the regulator 170. The valve 30 is comprised.

The first porter 31a of the solenoid valve 30 is connected to the outlet of the air compressor 100, and the second porter 31b is connected to the inlet of the regulator 170. When not energized, the first porter 31a and the exhaust porter 31c are connected to each other.

The regulator 170 can finely adjust the pressure, can be used to fix the bracket in the desired position, convenient handling.

Since the regulator 170 has a very small tank capacity, in order to provide stable compressed air, a plurality of air compressors 10a and 10b may be installed. The air compressors 10a and 10b of this embodiment have a structure of suctioning in parallel and discharging in series.

In addition, the check valve 50 described above is preferably provided between the solenoid valve 30 and the regulator 170.

The pressure sensor 180 is installed between the check valve 50 and the regulator 170.

It is preferable to cool the air compressor 10b by the cooling fan 24b and the through-hole 27b similarly to the air compressor 10a.

The controller 90 is applied by the pressure sensor 180 to drive control the air compressors 10a and 10b, the solenoid valve 30, and the cooling fans 24a and 24b.

The air pumping apparatus according to the embodiment of the present invention is not limited to the above-described embodiment, and may be variously modified and implemented within the range allowed by the technical idea of the present invention.

As is apparent from the above description, the present invention has the following effects.

First, when the non-energized solenoid valve is connected to the air pump and the atmosphere, when the energized air pump is operated at the no-load state of atmospheric pressure, the start of the air pump is smooth, it can contribute to the durability and compactness.

Second, by providing a check valve on the second port side, the backflow phenomenon can be surely prevented.

Claims (3)

A valve body having a first port, a second port, and an exhaust port; A solenoid mounted in the valve body; plunger; A spring interposed between the plunger and the valve body; An air pump connected to the first port; An air tank connected to the second port; Consisting of, The plunger closes the second port, opens the first port and the exhaust port by the force of the spring during non-energization, And the plunger closes the exhaust port and opens the first port and the second port by the electromagnetic force of the solenoid during energization. A valve body having a first port, a second port, and an exhaust port; A solenoid mounted in the valve body; plunger; A spring interposed between the plunger and the valve body; An air pump connected to the first port; A regulator connected to the second port; Consisting of, The plunger closes the second port, opens the first port and the exhaust port by the force of the spring during non-energization, And the plunger closes the exhaust port and opens the first port and the second port by the electromagnetic force of the solenoid during energization. The method according to claim 1 or 2, And a check valve is further provided on the second port side.

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