JPH0560543U - Centrifuge temperature display - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a temperature display device for displaying the temperature of a rotating body of a centrifuge, in which a rotating body is rotated at high speed in a vacuumed rotating chamber to perform centrifugal separation. The purpose of the present invention is to provide a user-friendly centrifuge that eliminates customer concerns due to temperature changes on the surface of the rotor due to heat of vaporization immediately after evacuation. A temperature display device in which a temperature sensor 7 detects the temperature of a rotating body 1 that is rotated at a high speed in a rotating chamber 2 that is evacuated by a vacuum pump 4 and is evacuated, and the detected temperature is displayed on a display unit 17. The temperature before the vacuum pump 4 is started is displayed until a predetermined time elapses after the vacuum pump 4 is started.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a temperature display device for displaying the temperature of a rotating body in a centrifuge in which a rotating body accommodating a sample to be separated is evacuated and evacuated to a high speed to perform centrifugal separation.

[0002]

[Prior Art]

 In a centrifugal separator that sets the rotating body in the rotating chamber and rotates the rotating body at high speed at a desired temperature, it is necessary to make the rotating chamber empty to prevent temperature rise due to friction between the rotating body and air. .. Further, in order to control the rotating body to a desired temperature, a temperature sensor for detecting the temperature of the rotating body and a control means are provided. Further, it has a display unit for displaying the temperature of the rotating body.

[0003]

[Problems to be solved by the device]

 When the operation of the vacuum pump is started in order to make the rotating chamber vacuum when the rotation of the rotating body is started, the heat of the surface of the rotating body is removed, and the temperature of the rotating body temporarily drops by about 5 ° C. The temperature of the rotating body returns to the original level in 1 to 2 minutes, but since it was displayed as it was in the past, there was a problem that it made the customer feel useless. It is an object of the present invention to provide a temperature display device for a centrifuge which eliminates the above-mentioned drawbacks of the prior art, eliminates customer concerns, and is easy to use.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention focuses on the fact that the surface temperature of the rotating body is temporarily reduced and the surface temperature returns to the original temperature after a lapse of a predetermined time because of the capacity of the rotating body itself. Since it can be judged that the value is almost the same as the temperature before evacuation, the temperature display during that time is not newly displayed.

[0005]

As described above, by displaying the temperature before the start of evacuation as the temperature measurement value for a predetermined time after the start of the operation of the vacuum pump, the temperature change on the surface of the rotor immediately after evacuation is not displayed. It does not cause unnecessary anxiety to customers.

[0006]

【Example】

 FIG. 1 is a schematic view showing an embodiment of the temperature display device of the present invention, FIG. 2 is a block diagram, and FIGS. 3 and 4 are flow charts. In FIG. 1, the rotating body 1 is rotated at high speed by a drive motor 6 via a shaft 5. The temperature control means 3 compares the detected temperature taken in by the radiant temperature sensor 7 facing the bottom of the rotating body 1 with the set temperature input from the operating condition input section 16 to bring the rotating body 1 to a predetermined temperature. Control. The temperature of the rotating body 1 detected by the radiant temperature sensor 7 is displayed by the operating state display unit 17.

The operation program and the temperature program of FIGS. 3 and 4 are programs configured to run periodically. The vacuum pump 4 is off before the centrifugal operation is started. A state in which the vacuum pump 4 is off will be described with reference to FIG. 3. Since there is no vacuum drawing instruction before the operation of the centrifugal separator is started, the process proceeds to step 308. At this time, the vacuum pump 4 is off, so the routine proceeds to step 311, and the temperature changing flag in the RAM 13 is turned on. On the other hand, on the temperature program side, after measuring the temperature in step 321, the temperature change flag is checked in step 322. When the vacuum pump 4 is off, the temperature change flag is on as described above, so the process proceeds to step 323 and the temperature display data is changed to the measured one and displayed. Therefore, the latest temperature is always displayed. Become .

When the centrifugal separation operation is started, an evacuation instruction is generated and the process proceeds to step 302. Since the vacuum pump 4 is off, the routine proceeds to step 303 to turn on the vacuum pump 4 and proceeds to step 304 to clear the time counter in the RAM 13. At step 305, since the time counter has been cleared, the routine proceeds to step 306, where the temperature change flag is turned off, and at step 307 the time counter is incremented by 1.

On the temperature program side, since the temperature change flag is turned off this time, the process proceeds to step 325 and the temperature display data is left as it is. That is, the temperature detection data before the vacuum pump 4 is turned on is displayed. After the vacuum pump 4 is turned on once, there is no instruction to draw a vacuum, so the routine proceeds to steps 308 and 309. When the operation is continued, the instruction to turn off the vacuum pump 4 is not issued, so the routine proceeds to step 305. Since the time counter value is still small, the routine proceeds to step 306, and the time counter is incremented by 1 with the temperature change flag kept off.

[0010] The time counter value does not exceed the certain value until this cycle runs a certain number of times or more, the temperature change flag remains off, and the temperature display data is the previous display data, that is, before the vacuum pump 4 is turned on. Display the data of. When this cycle runs for a certain number of times, the time counter becomes equal to or greater than a certain value in step 305, the temperature change flag is turned on in step 311, and the latest temperature display data is displayed.

When the centrifugal separation operation is stopped midway, an instruction to turn off the vacuum pump 4 is generated, the process proceeds from step 309 to step 310, the vacuum pump 4 is turned off, and the temperature change flag is turned on in step 311. Therefore, the latest temperature display data is displayed. After the vacuum pump 4 is turned off, it becomes the same as the first state, and the latest temperature is also displayed. With this process, the new temperature is not displayed for a certain period immediately after the evacuation, so it is possible to eliminate the anxiety caused by the rapid temperature change.

[0012]

[Effect of the device]

 According to the present invention, the detection of the temperature of the rotor due to the heat removal from the rotor immediately after vacuuming is neglected, so that the anxiety of the customer due to an unexpected temperature change can be eliminated and the usability is improved. be able to.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a temperature display device of the centrifuge of the present invention.

FIG. 2 is a block diagram showing an embodiment of a display device of the present invention.

FIG. 3 is a flowchart showing an example of an operation program.

FIG. 4 is a flowchart showing an example of a temperature program.

[Explanation of symbols]

1 is a rotating body, 2 is a rotation chamber, 3 is temperature control means, 4 is a vacuum pump, 5 is a shaft, 6 is a drive motor, 7 is a radiation temperature sensor, 8 is a rotation detection sensor, 11 is a CPU, and 12 is a ROM. , 13 is RAM, 14 is an input interface,
15 is an output interface, 16 is an operating condition input section,
Reference numeral 17 is an operating state display unit, and 18 is a battery.

Claims (1)

[Scope of utility model registration request] 1. A rotating body that contains a sample to be separated and is rotated at a high speed in a rotating chamber, a vacuum pump that exhausts the rotating chamber to a predetermined pressure, a temperature sensor that detects the temperature of the rotating body, and the temperature. In a centrifuge having a display unit that receives the output of the sensor and displays the temperature of the rotating body, until the elapse of a predetermined time from the start of operation of the vacuum pump, detection of the rotating body before the vacuum pump starts operating A temperature display device for a centrifuge, characterized in that the temperature is displayed.