Centrifuge with vacuum pump and control method thereof
AssigneeHitachi Koki Co., Ltd.
InventorsKouichi Akatsu, Masahiro Inaniwa, Hisanobu Ooyama, Shinichi Haruki
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Abstract
A centrifuge comprises a rotor for holding a sample, a rotation chamber for housing the rotor, a motor for rotating the rotor, an oil diffusion pump for reducing a pressure within the rotation chamber, and a control unit for controlling the heater temperature of the oil diffusion pump for a target set temperature. The control unit changes the target set temperature from a first given temperature to a second given temperature that is lower than the first given temperature after a given period of time elapses since the start of control of the heater temperature.
Claims15
A centrifuge comprising:
- a rotor for holding a sample;
- a rotation chamber for housing the rotor;
- a motor for rotating the rotor, an oil diffusion pump for reducing a pressure within the rotation chamber;
- a heater for heating oil in the oil diffusion pump;
- a first temperature sensor for detecting temperature of the heater;
- and
- a control unit for controlling the heater temperature of the oil diffusion pump for a target set temperature,
- wherein the control unit changes the target set temperature from a first given temperature to a second given temperature that is lower than the first given temperature after a given period of time elapses since the start of control of the heater temperature.
A control method of a centrifuge having a rotor for holding a sample, a rotation chamber for housing the rotor, an oil diffusion pump including a heater for heating oil in the oil diffusion pump and a sensor for detecting temperature of the heater, the control method comprising steps of:
- starting to heat the heater of the oil diffusion pump;
- controlling the temperature of the heater for a first given temperature;
- and
- controlling the temperature of the heater for a second given temperature that is lower than the first given temperature after a given period of time elapses since the start of heating of the heater.
Dependencies are inferred from the claim text.