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Digit button-operated air compressor output control structure

Digit button-operated air compressor output control structure description/claims

1. Field of the Invention

The present invention relates to air compressors and more particularly, to a digit button-operated air compressor output control structure.

2. Description of the Related Art

FIG. 1 illustrates a regular air compressor 1, which comprises a shielding shell 2 and a tank 3. The shielding shell 2 has mounted therein parts for generating compressed air such as motor, fan, and etc. The tank 3 is for accumulation of compressed air. When using the air compressor 1, the air outlet 4 of the air compressor 1 is connected to an external air tool (not shown) so that compressed air goes out of the air compressor 1 through the air outlet 4 to the external air tool for driving a movable part of the external air tool. The air compressor 1 has a control knob 5 for regulating the pressure of air that goes out of the air outlet 4, and a pressure meter 6 connected between the control knob 5 and the air outlet 4 for measuring the pressure of output air. The use of this structure of air compressor has drawbacks. When regulating the output pressure, the user must operate the control knob 5 and at the same time watch the indication of the pressure meter 6 till the accurate output pressure is in presence. The user shall have to spend a lot of time in regulating the desired output pressure. Further, because the control knob 5 is exposed to the outside of the shielding shell 2, it may be rotated or hit by a nearby worker accidentally, causing damage to the air tool or injury to workers.

The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a digit button-operated air compressor output control structure, which controls the output of compressed air from an air compressor by means of a digital control panel and an air pressure regulating structure so that the user can set the desired output air pressure quickly and control the output air pressure stably.

It is another object of the present invention to provide a digit button-operated air compressor output control structure, which is equipped with pressure sensors for accurate air pressure output control.

To achieve these and other objects of the present invention, the digit button-operated air compressor output control structure is for controlling output of compressed air from an air compressor, comprising a main body, an exhaust valve, an intake valve assembly, a first pressure sensor, a second pressure sensor, and a control panel. The main body is fixedly fastened to the air compressor, comprising an air inlet connected to the air compressor for guiding in compressed air from the air compressor, an air outlet for guiding out compressed air, a main air chamber, a first air passage in communication between the air inlet and the main air chamber, and a second air passage in communication between the air inlet and the main air chamber. The exhaust valve is movable in the main air chamber and divides the main air chamber into a first air chamber and a second air chamber. The first air chamber is in communication with the first air passage and the air outlet. The second air chamber is in communication with the second air passage. The intake valve assembly is mounted in the second air passage, and adapted to regulate the flow rate of compressed air from the air compressor into the second air chamber. The first pressure sensor is mounted in the second air passage between the air inlet and the intake valve assembly, and adapted to detect the air pressure in the second air passage and to output a first signal indicative of the detected air pressure. The second pressure sensor is mounted in between the intake valve assembly and the second air chamber, and adapted to detect the air pressure in between the intake valve assembly and the second air chamber and to output a second signal indicative of the detected air pressure. The control panel comprises a circuit board electrically connected to the intake valve assembly and the first pressure sensor and the second pressure sensor and adapted to convert the first signal from the first pressure sensor and the second signal from the second pressure sensor into respective digital signals for display through display screen means, a set of digit control keys electrically connected to the circuit board for setting the control of the intake valve assembly in regulating the flow rate of compressed air from the air compressor into the second receiving chamber, and display screen means electrically connected to the circuit board for displaying the digital signals produced by the circuit board.

FIG. 1 is an elevational view of a conventional air compressor.

FIG. 2 is an elevational view of a digit button-operated air compressor output control structure in accordance with the present invention.

FIG. 3 is an exploded view of the digit button-operated air compressor output control structure in accordance with the present invention.

FIG. 4 is a schematic side view of a part of the present invention, showing the structure of the connecting member of the main body.

FIG. 5 is a schematic side view of a part of the present invention, showing the arrangement of the control panel and the flow guide.

FIG. 6 is a schematic bottom view of a part of the present invention, showing the arrangement of the flow guide and the control panel.

FIG. 7 is a schematic bottom view of a part of the present invention, showing the arrangement of the flow guide and the valve holder.

FIG. 8 is a schematic drawing of a part of the present invention, showing the flowing direction of compressed air in the flow guide and the connecting member.

FIG. 9 is a schematic sectional view of a part of the present invention, showing the arrangement of the first regulating valve and the second regulating valve in the valve holder.

FIG. 10 is a top view of the touch panel according to the present invention.

• Provisional Patent
• Utility Patent

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