JPS6027791A - Combination compressor and method of controlling operation thereof - Google Patents

Abstract

PURPOSE:To lower the energy consumption, to omit the loss of time and labor and to lower the cost without requiring preparative operation or the like, by storing compressed air and pressure-reduced air in separate tanks respectively. CONSTITUTION:When a compressor 1 is driven, air is sucked via an air circuit 17 to be loaded into a compressor tank. When the pressure of the compressor tank 5 reaches a prescribed pressure, a solenoid valve 16 is changed over and the air in a vacuum tank 6 is sucked from an air circuit 14 via a by-pass circuit 21. Since a relief valve 18 is actuated simultaneously with the operation of the solenoid valve 16, the sucked air is released via an air circuit 19 into the atmosphere. Also when the pressure of a vacuum tank 6 reaches a prescribed pressure, a solenoid valve 12 is changed over, the air in the atmosphere is sucked and is released from the bypasses 20, 21 via the circuit 19 into the atmosphere.

Description

[Detailed description of the invention] This invention also includes compressors and blowers.

The present invention relates to a combination compressor having a vacuum pump (the same applies hereinafter) and an efficient operation control method thereof.

In the past, compressors and vacuum pumps were separate products and were used individually depending on the application. However, recently, compressed air is often used around vacuum equipment. For example, when sucking up paper, etc. with a vacuum pump and placing it somewhere else, conventionally the suction port would be released to atmospheric pressure; It takes time for the robot to touch the ground, and the accuracy of the grounding is also poor. So, if you use compressed air to forcefully blow it out,
Speed-ups and accuracy improvements can be expected.

By the way, it has been known in the past to have a set of a compressor and a vacuum pump, or to use a compressor or a vacuum pump in the forward or reverse direction and use them as a compressor and a vacuum pump, respectively. However, all of these have one tank, and if you use what was previously used as a compressor as a vacuum pump, you must first remove the compressed air from the tank, and then depressurize the same tank. Ta. Therefore, this switching operation was time consuming and wasteful, and vice versa.

Therefore, the present invention aims to store compressed air and decompressed air in separate tanks so that they can be used together at any time, and also to allow both to operate in a mutually complementary manner. It is composed of

Embodiments of this invention will be described below with reference to the drawings, in which FIGS. 1 and 2 are front views of the combination compressor according to the invention, and FIG. 6 is a front view of the combination compressor according to the invention, and FIG. The air circuit diagram and FIG. 4 are control circuit diagrams of the drive motor.

A combination compressor has both a compressor and a vacuum pump, but in the example shown in Fig. 1, the compressor 1 and the vacuum pump 2 are separate units. Air is sucked in through 6, and the compressed air is stored in a compressor tank 5 through piping 4. In addition, the air path of the vacuum pump 2 is such that the vacuum pump 2 supplies air from the vacuum tank B to the pipe 7.
Air is taken in through the exhaust port 8 and exhausted into the atmosphere through the exhaust port 8. The compressor tank 5 and the vacuum tank B are each provided with opening/closing pulps 9 and 10, which are opened and closed to take out compressed air or reduced pressure air for use.

On the other hand, in the example shown in Fig. 2, the compressor 1 and the vacuum pump 2 are integrated, and the compressor 1 and vacuum pump 2 sucks air from the vacuum tank B through the piping 7. The structure is the same as the example shown in FIG. 1, except that the exhaust gas is discharged to the compressor tank 5 through the pipe 4.

As mentioned above, this invention is as described above, namely,
Since it is a set with a dedicated compressor tank 5 and vacuum tank 6, compressed air and decompressed air are always stored in these tanks 5 and 6, so you can use them at any time. Moreover, they can be taken out and used at the same time. In this respect, as before, complet.

Compared to the installation of two vacuum pumps, a compact and inexpensive device can be obtained.

Furthermore, compared to systems that require switching between - tanks, there is no effort or time loss required for switching, and there is no need to waste the compressed (decompressed) air that has been stored, so it is cost-effective. Become.

Recently, there has been a package type compressor 1 etc. in consideration of noise countermeasures, etc., but the combination compressor according to this invention,
In this case, it is of course possible to use a package type, and in order to save space, there are some cases in which the tank 5 and the like are distributed, but it is also possible to use such a type.

Next, when such a combination compressor is operated using the operation control method described below, efficiency and
Costs will be greatly improved.

That is, in addition to forming an air circuit 14 from the vacuum tank 6 to the filter 11, solenoid valve 12, vacuum pump 2, check valve 15, and compressor tank 5, the filter 15 has its most upstream point open to the atmosphere; Solenoid valve 1
6 and a compressor 1 are provided, and the air circuits 17 are made to join together on the upstream side of the above-mentioned reverse valve 15. Furthermore, an air circuit 19 leading to a relief valve 18 whose exhaust port is open to the atmosphere is also branched between this confluence point and the reverse valve 16.

The solenoid valve 12 connects the air circuit 14 and the filter 1 described above.
Bypass circuit 20 branched from another air circuit 17 downstream from 5 is selected, and the air circuit 14 downstream from this bypass circuit 20 is selected.
Make sure you can connect to it.

The solenoid valve 16 also has an air circuit 17 and a bypass circuit 21 branched from the air circuit 14 on the downstream side of the solenoid valve 12.
is selected so that it can be connected to the air circuit 17 on the downstream side.

Furthermore, pressure switches 22.23 are provided in the controller 5 and the vacuum tank 5 to detect their respective pressures and issue commands, and these pressure switches 22.23 operate the respective electromagnetic valves 12.16 described above. (For the solenoid valve 16, use the relief valve 18.
For example, when the compressor 1 is driven, air is taken in from the air circuit 17 and filled into the compressor tank 5, but if the compressor tank 5 reaches the specified pressure during that time, the pressure switch 2
2 operates, switches the solenoid valve 16, and this time the air in the vacuum tank 6 is taken in from the air circuit 14 through the bypass circuit 21, and at the same time, the solenoid valve 16 switches the IJ I
Since the J-f valve 18 is activated, the intake air is discharged into the atmosphere through the air circuit 19 instead of into the compressor tank 5. At this time, vacuum tank 6
When the specified pressure is reached, the solenoid valve 12 is switched by the action of the pressure switch 26, and air from the atmosphere is sucked in and discharged into the atmosphere through the air circuit 19 from both bypass circuits 20 and 21. In this case, appropriate measures such as stopping the drive motor 24 are taken as described later.

On the other hand, when the vacuum pump 2 is driven, the air in the vacuum tank 6 passes through the air circuit 14 and is filled into the compressor tank 5. During this time, when the compressor tank 5 reaches a specified pressure, the pressure switch 22 is activated. ,
Since the electromagnetic valve 16 and the relief valve 18 are switched, the high pressure air exhausted from the vacuum pump 2 is discharged into the atmosphere through the air circuit 19 instead of into the compressor tank 5. Further, when the vacuum tank 6 reaches a specified pressure, the pressure switch 23 operates to switch the solenoid valve 12, so that the vacuum pump 2 takes in air not from the vacuum tank 6 but from the atmosphere through the bypass circuit 20. It should be noted that when both pressure switches 22, 23 (both and tank 5, 6 reach the specified pressure) are activated, the same as in the previous case occurs.

That is, if both pressure switches 22 and 23 are plowed, the electromagnetic opening/closing of the drive motor 24 i? ii) 25 is opened and the drive motor 24 is stopped. However, when one of the pressure switches 22, 23 returns to its original state (when the pressure in either tank 5, 6 falls below the specified pressure), the electromagnetic switch 25 closes again and drives the drive motor 24. .

This invention is as described above, and the point is that as long as either the compressor 1 or the vacuum pump 2 is operating, the compressor tank 5 and the vacuum tank 6
Both operate continuously to reach the specified pressure, and since the intake and exhaust of one becomes the exhaust and intake of the other, the operation of one effectively and efficiently complements the operation of the other. This eliminates the need for E1 preparatory operation, which reduces energy consumption, and both tanks 5 and 6 are always on standby in an operating position.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are front views of a combination compressor according to the invention, FIG. 6 is an air circuit diagram for controlling its operation, and FIG. It is a control circuit diagram of a drive motor. (Symbol) 1...-Compressor 2...Vacuum pump 5...Compressor tank 6/Fist/Vacuum tank 14.17.19...Air circuit Applicant Meiji Machinery Co., Ltd. Agent Patent attorney Yoshio Itano No. Figure 1 Figure 5 Procedural Amendment (Direction) December 1981 3 (sung by Kazuo Wakasugi, Commissioner of the Patent Office) 1. Indication of the case 1982 Patent Application No. 136635 3. Case of the person making the amendment Relationship between principal 4 and agent 7f13 ((I3゜17.7□-
1□675, date of amendment order November 8, 1980 (shipped on November 29 of the same year) 6, number of inventions increased by amendment 7, subject of amendment

Claims (1)

[Claims] (1) A combination compressor that has both a compressor (1) and a vacuum pump (2), characterized in that it is equipped with a dedicated compressor tank (5) and vacuum tank (6) as a set. A combination compressor. (2) A combination pump presser according to claim 0, characterized in that the pump presser (1) and the vacuum pump (2) are each of a separate dedicated type. ■、Hump presser (1) and vacuum pump (2) are -
The combination compressor according to claim 0, characterized in that it is of a dual-use type. (2) A combination compressor that has a humbresser (1) and a vacuum pump (2), and stores the compressed air and decompressed air in separate compressor tanks 6) and vacuum tanks (6); The compressor (1) and vacuum pump (2) installed in parallel between (5) and the vacuum tank (6),
The compressor tank (5) and the vacuum tank (6)
) and an air circuit (14) communicating between the air circuits (14) and
an air circuit (17) that branches off from 4) and takes in and exhausts air into the atmosphere;
By selectively connecting the compressor (19) and the vacuum pump (2), the pressure in the compressor, the tank (5), and the vacuum tank (6) can be maintained regardless of whether the compressor (1) or the vacuum pump (2) is operated. A method for controlling the operation of a combination compressor, characterized in that air intake and exhaust to and from the compressor tank 6) and the vacuum tank (6) are continued until a specified pressure is reached.