Hand-held vacuum pump and automated urinary drainage system using pump thereof

Abstract

In the hand-held vacuum pump 1, the main body 1a of the vacuum pump in which the pump room 4a is formed and the electric motor 2 are connected via the shaft coupling 21. The main body of the vacuum pump has the driving shaft 10. One ball bearing 15b supporting the driving shaft is supported by the cylinder. The other ball bearing 15a is sup ported by the flange 5 mounted hermetically at the cylinder. The end part of the cylinder at the side of the electric motor accommodates the shaft coupling, and is engaged with the end part of the electric motor so that the electric motor may support the cylinder.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a hand-held vacuum pump, and specifically to a hand-held vacuum pump preferable for an automated urinary drainage system. [0002] An example of the urine suction apparatus for urinary drainage for the people finding difficulty in moving on his or her own ability to the place where he or she relieve himself or herself is described in the Japanese Patent Application Laid-Open No. 2003-126242. In the urine suction apparatus sited in this Patent Gazette, a urine storage container is located between the urine receiver and the suction pump operated as the suction engine. When the urine is discharged into the urine receiver, the urine discharge is detected and the discharged urine is sucked from the suction pipeline into the urine storage container. In this operation, the suction operation of the suction pump is controlled by referring to the signal from the pressure sensor for detecting the changes in the pressure inside t...

AI Technical Summary

Benefits of technology

[0006] In order to solve the problems in the prior art, an object of the present invention is to downsize the vacuum pump and increase its portability. Another object of the present invention is to increase the reliability of the vacuum pump having portability. Further another object of the present invention is to enable the urinary drainage system having a vacuum pump to be used in the night and out of doors.

[0014] According to the present invention, as the structure of the vacuum pump is simplified, it will be appreciated that the downsizing of the vacuum can be attained and the portability can be increased. As the positioning accuracy at the individual parts is increased by using a simplified structure and the lubrication between the stationary parts and the moving parts are sufficiently provided, it will be appreciated that the reliability of the vacuum pump having portability can be increased. As the positioning accuracy is increased, it will be appreciated that the number of noise generation sources and their noise intensity can be reduced, and the urinary drainage system to which this vacuum pump is applied can be used in the night and / or out of doors.

Problems solved by technology

However, in the Japanese Patent Application Laid-Open No. 2003-126242, there is not sufficient consideration for downsizing the suction pump and reducing its operation noise.

Although one of the most effective methods for downsizing the pump is to increase the rotating speed of the pump, in case of attempting to increase the rotating speed of the pump, especially the positive displacement pump generally used as the small-sized pump, the relative gap between the rotating member and the stationary member increases which leads to reducing the efficiency.

In addition, increasing the rotating speed simply may result in the increase in the noise generated from the pump.

However, as this compressor is not intended to be used for the hand-held medical device such as urinary drainage system, the downsizing of the compressor may experience a complexity in the structure of the compressor itself that is the result of the design respecting the performance primarily.

In addition, the intended use of the compressor does not assume the usage in the night, and thus, there is not sufficient consideration of the reduction of the noise generated in the intermittent operation of the compressor.

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