JP2596417Y2 - Water drop discharge mechanism of centrifuge - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge mechanism for flowing water droplets and the like accumulated in a chamber to the outside of a chamber when a component of a sample is separated by a centrifuge.

[0002]

2. Description of the Related Art FIG. The water droplets accumulated in the chamber 3 are discharged to the outside through a drain 5 provided with an outlet on the lower surface of the chamber 3.

[0003]

[Problem to be solved by the invention] In the conventional method,
Since the inside and outside of the chamber are always connected by the drain and the atmosphere can move, the flow of the atmosphere during the rotation of the rotor allows the cool air inside the chamber to escape, dust enters the chamber, and samples such as viruses scatter in the chamber. There are problems such as the danger of infection to the human body and the generation of wind noise when the rotor rotates at high speed. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem while providing the drain with the function of discharging water droplets.

[0004]

An object of the present invention is to provide an on-off valve at the drain, open the on-off valve only when the motor rotation speed is less than a certain rotation speed, and flow water droplets or the like generated in the chamber to the outside of the chamber. Discharge. Other than that, the problem can be solved by performing control such as closing the on-off valve.

[0005]

An opening / closing valve is provided in the middle of the drain drawn from the lower surface of the chamber. The on-off valve switching speed is determined in advance. The motor rotation speed and the on-off valve switching rotation speed are compared as needed by a microcomputer. If the motor rotation speed is lower, the on-off valve is opened and water droplets in the chamber are discharged at the drain. Only when the motor speed exceeds the on / off valve switching speed, the on / off valve is closed to shut off the ventilation inside and outside the chamber.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The operation panel 8 is used to set operation conditions, switch operation states, display set conditions, display operation states, and the like in operating the centrifuge. The rotation detector 7 detects the number of rotations of the motor 4. The microcomputer 4 receives the states of the operation panel 8 and the rotation detector 7 and controls the speed of the motor 4 and the opening and closing of the on-off valve 6 via the motor driving circuit 9. An on-off valve 6 is provided in the middle of the drain 5 drawn from the bottom of the chamber 3. The on-off valve switching rotation speed N is determined in advance. The motor rotation speed and the on-off valve switching rotation speed N are compared at any time by the microcomputer 10, and when the motor rotation speed is lower,
The on-off valve 6 is opened, and water droplets in the chamber 3 are discharged from the drain 5. The on-off valve 6 is closed only when the motor rotation speed exceeds the on-off valve switching rotation speed, and the ventilation inside and outside the chamber 3 is shut off.

[0007]

According to the present invention, while having a function of discharging water drops accumulated in the chamber to the outside of the chamber, the cool air inside the chamber escapes, dust enters the chamber, and a sample such as a virus scatters in the chamber. Problems such as danger of infection to the human body and generation of wind noise when the rotor rotates at high speed can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of functions required for the present invention.

FIG. 2 is a schematic diagram of a conventional technique.

FIG. 3 is a schematic diagram of a control system required for control for the present invention.

FIG. 4 is a timing chart of the present invention.

[Explanation of symbols]

1 is a rotor, 2 is a seal rubber, 3 is a chamber, 4 is a motor, 5 is a drain, 6 is an on-off valve, 7 is a rotation speed detector, 8
Denotes an operation panel, 9 denotes a motor drive circuit, and 10 denotes a microcomputer.

Claims (2)

(57) [Scope of request for utility model registration] 1. A sample of blood, microorganisms, microbial cells, biological cells, chemical substances, etc. is loaded into a rotor, the rotor is mounted on a rotating shaft, and the sample is subjected to centrifugal force generated by high-speed rotation. In a centrifuge that separates, an on-off valve is provided at the drain for discharging water droplets and the like accumulated in the chamber, and the switch is opened only when the motor rotation speed is equal to or lower than a certain rotation speed. A water drop discharging mechanism for discharging water. 2. A centrifuge having the mechanism and control of claim 1.