JP2005152750A - Centrifugal separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a maintainability-excellent centrifugal separator having a means for easily recognizing information also useful for cause investigation and recurrence prevention when a failure occurs. <P>SOLUTION: The centrifugal separator has a means for memorizing and displaying program operation and each integral usage number of RCF (relative centrifugal force) setting operation and pulse operation. Further, the centrifugal separator has the function of displaying the above-mentioned memory data on a display part when a maintenance person carries out a predetermined operation. Further, the centrifugal separator is provided with a means for transferring the above memory data to a personal computer. Thereby, a labor of the maintenance person can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to maintenance management of a centrifuge.

  If a centrifuge breaks down or breaks, not only is the sample lost during centrifugation and the cost of repairing the centrifuge, but the centrifuge cannot be used during the repair, making it difficult for the business. However, the manufacturer carefully evaluates and supplies the product so that no failure or damage will occur. In addition, failure or damage due to an unexpected usage method or usage pattern may occur.

  Therefore, for a drive unit that will be damaged when a failure or breakage occurs, the time (life) and the number of rotations that can be used in advance, and the number of times (life) and / or time (life) that can be used in advance for the rotor Some are stipulated. Furthermore, in the case of a centrifuge that is particularly prone to failure or damage caused by the use of a drive unit or rotor beyond this determined life, the operation results are recorded by the user every time the centrifuge is used. However, it was necessary to manage the state of use so that it was recorded in a notebook, etc., and was not used beyond the specified lifetime. Further, in order to save the time and effort described above, it is devised so that the operation result management can be automatically performed as disclosed in Japanese Patent No. 2671642, the operation result management method disclosed in Japanese Patent Laid-Open No. 2001-104835, or the life management of the rotor A centrifuge employing the method is also provided.

However, since it is difficult to prevent failures and damage due to unexpected usage methods and patterns, so that the recovery period can be accelerated as much as possible,
The fault location and cause-specific alarms are displayed, and the centrifuge control status (acceleration or deceleration status, etc.) is stored in chronological order in addition to the specific alarm when an alarm occurs, and the maintenance operator performs a predetermined operation. Accordingly, there is also a centrifuge having a function of displaying a failure content and a control state at the time of the failure in time series on the display unit.

Japanese Patent No. 2671642

JP 2001-104835 A

As mentioned above, failure and damage due to unexpected usage methods and usage patterns can be improved by investigating the cause and reflecting the improvement in product quality if the actual usage situation can be investigated. Since there are many cases where a centrifuge is used in common by a plurality of users under various usage conditions, it is difficult to obtain an accurate usage situation from the user. If a storage unit is provided in the control unit of the centrifuge and all actual use conditions are stored, it can be used for the above-described improvement, but it is not realistic in view of the required capacity of the storage unit.
In order to solve the above-described problems, an object of the present invention is to store a user's usage method and usage pattern in a centrifuge and to help improve the quality of the centrifuge. In addition, it is to be able to handle maintenance individually for each user-specific usage pattern.

  In some centrifuges, when the sample is centrifuged under the same conditions, the separation condition memory function can be used to set the desired conditions with a simple switch operation or button operation without performing the troublesome operation of resetting the conditions one by one. A function that can input not only the rotation speed of the rotor but also the centrifugal acceleration obtained, a pulse operation function that accelerates the rotor only while the button is pressed, and mainly screens the droplets adhering to the wall of the tube (test tube). I have it. By using these functions, the usage status of each function is stored in the storage unit in the control unit of the centrifuge.

  According to the present invention, since the usage status of the centrifuge can be accurately grasped, information on the usage status of the centrifuge necessary for investigating the cause when a failure occurs in the user or maintenance personnel and preventing recurrence Therefore, it is possible to provide a centrifuge excellent in maintainability.

An embodiment of a centrifuge according to the present invention will be described with reference to FIGS.
In FIG. 1, 1 is a control panel, 2 is a door, 3 is a rotating chamber, 4 is a rotor, 5 is a refrigerator, 6 is a drive unit, 7 is a temperature sensor, 8 is a door switch, 9 is a rotor discrimination device, and 20 is The control device 27 is a personal computer. In addition, although the control apparatus 20 is originally arrange | positioned in the housing | casing 15, in FIG. 1, it has described in the outer side of the housing | casing 15 for description.

  The centrifuge 10 has an operation panel 1 disposed on an upper portion of a housing 15. An operation unit 1 b for inputting operation conditions such as a rotation speed, an operation time, a set temperature, and the like are provided on the operation panel. A display unit 1a for displaying the operating conditions input from the unit 1b and the operating state is arranged, and an opening is provided in the upper part of the housing 15, and an openable / closable door 2 is arranged in the upper part of the opening. The rotating chamber 3 is disposed at the lower part of the opening. A driving unit 6 for rotationally driving the rotor 4 is disposed at the center of the lower part of the rotating chamber 3. A plurality of types of rotors 4 are prepared according to the volume of the sample to be centrifuged and operating conditions, and the rotor 4 is detachably disposed on the driving unit 6 via a crown (not shown) provided on the upper part of the driving unit. . A rotor discriminating unit corresponding to each rotor is disposed on the rotor bottom. Further, a rotor discriminating device 9 is arranged at the bottom of the rotating chamber 3 in order to read the identifier arranged in the rotor discriminating unit.

  A refrigerant pipe for cooling the inside of the rotating chamber 3 is arranged on the outer periphery of the rotating chamber 3, and a refrigerator for circulating the refrigerant in the refrigerant pipe is arranged at the bottom of the casing 15. The control device 20 controls the drive unit and the refrigerator based on the operation conditions input from the operation unit 1b and the output signals from the door switch 8, the rotor discrimination device 9, and the temperature sensor 7, and various data is displayed on the display unit 1a. Is controlled to display. In addition, although the drive part 6 and the refrigerator 5 are driven by the same drive circuit 26, the drive part 6 and the refrigerator 5 may be comprised by the separate drive circuit.

  The controller 20 includes a CPU 21 (Central Processing Unit), an SRAM (Static Random Access Memory) 22 capable of reading and writing data at a high speed, and an EEPROM (Electrically Erasable Programmable Read Only Memory) 23 capable of electrically reading and writing data. And a battery 25 for holding the data stored in the SRAM 22 even when the centrifuge is turned off, a control program for controlling the operation of the CPU 21, and control information data groups 24a for various rotors (maximum speed, temperature control data, A ROM (Read Only Memory) 24 storing a rotation radius min, a rotation radius max, a driving unit shaft to be used, and the like is provided. Further, the EEPROM is configured so that service personnel or the like can additionally register rotor control information data that has not been input at the time of shipment of the centrifuge.

  A signal is sent to the drive circuit 26 according to the operation conditions (rotor number, rotation speed, operation time, control temperature, acceleration gradient, deceleration gradient, etc.) of the centrifuge from the operation unit 1b of the operation panel 1, and the drive unit 6 and the refrigeration are frozen. The machine 5 is controlled to operate the rotor 4 at a desired rotational speed and temperature for the input operation time. In addition, an identifier (not shown) serving as an identification number for each rotor is arranged in a ring shape at the lower portion of the rotor. Information corresponding to the rotor type obtained by the rotor discrimination sensor 9 during the rotor acceleration is extracted from the control information data group 24a or the EEPROM 22 and temporarily read out to the SRAM 23, so that control information suitable for various rotors can be obtained. Can be obtained. In addition, the control device 20 includes an external communication port, and data communication is possible by connecting the external connection terminal 28 disposed in the housing 15 and a personal computer with RS232C. As another communication method, it is conceivable to use a method such as USB (Universal Serial Bus) or LAN.

  Here, in the centrifuge according to the present invention, an area for storing various operation result data 22 a to 22 k as shown in FIG. 2 is provided in the SRAM 22 in the control device 20. In addition, although the door closed integrated energization time during the stop for each set temperature of the storage area 22j is not shown, the storage area is further divided according to the temperature. Further, in order to store important data among the data stored in the SRAM 22 in preparation for the case where the battery 25 is depleted and the data in the SRAM 22 cannot be held, the storage areas 23a to 23f are provided as shown in FIG. Keep it. This is prepared for the problem that data in the SRAM 22 is lost when the battery 25 is consumed, and is not always necessary.

The EEPROM 23 does not require a battery to hold data, but the number of times of recording is limited, frequent recording is impossible, and in order to copy all the data in the SRAM 22 to the EEPROM 23, it is necessary to increase the capacity of the EEPROM 23. This is because of the cost. By prioritizing the data to be stored and storing only highly important data in the EEPROM 23, the capacity can be reduced and the cost can be reduced.
Next, an example of a method for detecting the door open / close state will be described with reference to FIG. The door switch 8 is attached to the housing 15 of the centrifuge 10 via the door lock holder 11, and the door hook 2 a is attached to the inside of the door 2 at a position where it is inserted into the opening of the housing 15.

  The switch portion 8a is configured such that when the door is open, one end of the hinge lever 8f is pushed up by a spring 8e so that the button 8b is pushed at the other end as shown by the broken line portion in FIG. When the door 2a is closed, the door hook 2b pushes down the hinge lever 8f in the direction of the arrow in FIG. 4 and changes from a broken line position to a solid line position so that the button 8b is released from the depressed state. ing. In addition, between the terminal 8c and the terminal 8d of the switch portion 8a, the door 2a is closed because the button 8b is non-conductive when the button 8b is not pressed down and conductive (or vice versa) when the button 8b is pressed down. Or the open state can be detected by the CPU 21 in the control device 20 of FIG.

FIG. 5 is a flowchart showing one embodiment of the recording process of the door integrated opening / closing frequency according to the present invention.
First, steps of how to count the total number of door opening / closing operations will be described.
When the power of the centrifuge 10 is turned on, each accumulated data up to the previous time stored in the storage areas 22a to 22f of the SRAM 22 shown in FIG. 2 is copied (backup) to the corresponding backup areas 23a to 23f shown in FIG. (Step 1).

Next, it is confirmed how the door is changed in the closing direction (step 2). When the door is changed in the closing direction (the door switch 8 changes from non-conductive to conductive), the CPU 21 reads the previous accumulated door opening / closing count stored in the storage area 22k of the SRAM 22, and the door is newly opened. The fact that it has been closed once is added (previous cumulative opening / closing count + 1) and re-stored (re-registered). (Step 3). Next, it is determined whether or not the cumulative number of door opening / closing operations has reached a specified value (target life) (step 4). When the cumulative opening / closing number of doors has reached a specified value (target life), an alarm is displayed on the display unit 1b. If the specified life has not been reached, the process returns to step 2 (step 5).
The above operation is performed until the centrifuge 10 is turned off.

  More specifically, when the power supply of the centrifuge 10 is turned on, the accumulated data up to the previous time stored in the storage areas 22a to 22f of the SRAM 22 shown in FIG. Copy to backup areas 23a-23f and save as backup data.

  When the door 2 is closed, a signal from the door switch 8 is sent to the CPU 21. Based on this signal, the CPU 21 determines that one opening / closing operation has been performed, reads the accumulated opening / closing number of doors from the storage area 22k of the SRAM 22, and adds and re-stores that there has been one opening / closing operation. If the cumulative number of open / close operations after the addition is equal to or greater than a predetermined value (the number of lifetimes), it is notified that the maintenance time for moving parts such as gas springs has come. Therefore, an alarm is displayed on the display unit 1a.

FIG. 6 is a flowchart showing an embodiment of the door opening and door closing state integration time recording process of the present invention.
When the power of the centrifuge 10 is turned on, each accumulated data up to the previous time stored in the storage areas 22a to 22f of the SRAM 22 shown in FIG. 2 is copied (backup) to the corresponding backup areas 23a to 23f shown in FIG. (Step 1). Next, the CPU 21 resets and initializes the 1-second timer (step 2). Next, it is confirmed whether the 1-second timer has passed 1 second. If it is confirmed that 1 second has passed, the process proceeds to step 4 (step 3).

  Next, it is confirmed whether the drive unit 6 is stopped or in operation (step 4). If the drive unit is operating in step 4, the process jumps to step 7 and resets the 1 second timer, and then returns to step 3 (step 7). If the drive unit 6 is stopped in step 4, the process proceeds to step 5 to determine whether the door is open or open. If it is open, the process proceeds to step 6. If the door is closed, the process proceeds to step 8. move on. (Step 5). Next, when it is determined in step 5 that the door 2 is open, the accumulated door open energization time during stoppage in the storage area 22e of the SRAM 22 is read, and 1 second is added and recorded again (step 6). Next, the 1-second timer is reset, and the process returns to step 3 (step 7).

  If the door is not open in step 5, the stop-time closed door energization time is read from the storage area 22f of the SRAM 22, and 1 second is added and re-recorded (step 8). Next, when the door 2 is closed, in order to record the integrated energization time for each set temperature input from the operation unit 1b, the door closed integrated energization time for each set temperature in the storage area 22j of the SRAM 22 is read. Add 1 second to the corresponding storage area for each temperature and re-register (step 9). Next, the 1-second timer is reset, and the process returns to step 3 (step 7).

  More specifically, when the power supply of the centrifuge 10 is turned on, the accumulated data up to the previous time stored in the storage areas 22a to 22f of the SRAM 22 shown in FIG. Copy to backup areas 23a-23f and save as backup data. Next, the CUP 21 resets the 1-second timer and determines whether the operation is stopped or in operation depending on whether power is supplied from the drive circuit 26 to the drive unit. When the drive unit is in operation (when electric power is supplied), the 1-second timer is reset without storing the elapsed time in the storage area of the SRAM 22.

  Next, when the drive unit 6 is stopped (when power is not supplied), the accumulated energization time in the state in which the door 2 is opened and in the closed state is stored. Further, when the door is closed, the accumulated energization time is recorded for each set temperature input from the operation unit 1b. By doing so, it is possible to grasp the dew condensation state in the rotor chamber and the operating state of the refrigerator 5.

  By repeating the above process until the power is turned off, the open / closed state of the centrifuge door when the drive unit is stopped can be recorded with high accuracy. Further, the method of counting the accumulated time using the 1-second timer according to the above description is an example, and any method may be used as long as it is a means for measuring time. By the above means, it is possible to know how much the above-mentioned pre-cooling operation is used in a centrifuge having a cooling function, and furthermore, it is possible to record by setting temperature, so that a dew condensation state can be estimated, and a guide for maintenance of the drive unit As a result, maintainability is improved.

  Further, in the centrifugal separator 10 of the present invention, the stop-time door open integrated energization time, the stop-time door closed integrated energization time, and the stop temperature-dependent stop-close integration energization stored in the storage areas 22e, 22f, 22j, 22k. The time and the door opening / closing count can be displayed on the display unit 1a.

  Further, by operating the switch of the operation unit 1b, it is possible to switch the display of the closed door open energization accumulated time, the stopped door close energized accumulated time, the stopped door closed energized accumulated time for each set temperature, and the door accumulated open / close count. it can. Furthermore, it can be connected to a storage device such as an external personal computer or a device having a display unit via the external connection terminal 28, and data can be transmitted and received.

Next, operation performance management of the drive unit 6 of the centrifuge 10 will be described.
FIG. 7 is a cross-sectional view of a centrifuge drive device for explaining the present invention.
In this figure, the left and right rotors are shown together for the sake of explanation, and the actual rotor has the shape of the left and right objects. In the drive part 6 provided so that a drive shaft may have a rigid axis and an elastic axis on the same axis, the drive shaft used differs with the rotor which a user uses.

  For example, the rotor 4 is supported by the elastic shaft 30 and is rotationally driven, and the rotor 38 is supported in the axial direction by the high-rigidity shaft 31, and the rotational drive is performed by the elastic shaft 30. It is configured to be done. For this reason, as in the prior art, it is not sufficient to manage the operation results of the drive unit 6 simply by managing the operation results of the drive unit 6 (the accumulated operation time, the accumulated rotation speed, and the accumulated operation frequency) regardless of the rotor used. It was.

  According to this function, by recording the operation results for each drive shaft, it is possible to accurately grasp the use results of the bearings of each shaft, and the replacement of the bearings 34 and 35 can be broken according to the use results of each shaft. Since it can be carried out before it occurs, the maintainability of the drive unit with respect to the management method of the operation results of the drive unit 6 (integrated operation time, integrated rotation number, and integrated operation number) regardless of the conventional rotor used As long as the usage is not biased to either axis, the service life can be extended.

Next, a configuration for managing results for each axis of the drive unit 6 will be described.
A discriminator (not shown) provided in a discriminating unit for discriminating the rotor at the lower part of the rotor is detected by the CPU 21 by the rotor discriminating sensor 9 so that the CPU 21 detects the type of rotor (rotor identification number). The rotor control information data group 24a in 24 and the discriminated rotor control information data group stored in the EEPROM are called so that the CUP 21 can determine the drive shaft used by the operating rotor. .

FIG. 8 is a flowchart showing an embodiment of the operation record processing for each drive axis according to the present invention.
The processing contents of this function will be described with reference to the flowchart. When the power supply of the centrifuge 10 is turned on, the accumulated data up to the previous time stored in the storage areas 22a to 22f of the SRAM 22 shown in FIG. Copy (backup) to the described backup areas 23a to 23f (step 1). Next, it waits until the drive part 6 starts rotation (step 2).

  Next, when the drive unit 6 starts operation, the rotor discriminating sensor 9 discriminates the type (rotor identification number) of the rotor rotated, and the corresponding rotor information is stored in the control information group 24a according to the rotor number in the ROM 24 or the EEPROM. Is acquired from the rotor number-specific control information data group stored in (3). Next, the drive shaft used by the rotor 4 that has started operation is determined (step 4). Next, in the case of the rigid shaft 31 in step 4, the CPU 21 reads the previous high-rigidity shaft rotor accumulated operation count stored in the storage area 22b of the SRAM 22 and adds that it is newly used once. After (last integrated operation count + 1), it is stored again (step 5).

  Next, the CPU 21 resets and initializes the 1-second timer (step 6). Next, it is confirmed whether the 1-second timer has elapsed (step 7). If 1 second has not elapsed, it is determined whether or not the drive unit 6 is stopped. Further, when the drive unit 6 is rotating, the process proceeds to step 7 and circulates between step 7 and step 10 until the timer elapses (step 10). Next, in step 7, if 1 second has passed, the process proceeds to step 8.

  Next, the CPU 21 reads the previous high rigidity shaft rotor integrated operation time stored in the storage area 22a of the SRAM 22, adds 1 second (previous integrated operation time + 1 second), and stores it again (step 8). Next, the 1-second timer is reset (step 9). Next, the operation state of the drive unit 6 is confirmed. If the drive unit 6 is operating, the process returns to step 7 and the rigid shaft rotor integrated operation time is added until the drive unit 6 stops. If the drive unit 6 is stopped, the process returns to step 2 to monitor the drive unit 6 starting to rotate (10).

  Next, when the drive shaft used by the rotor 4 that has started operation in step 4 is the elastic shaft 30, the CUP 21 reads the elastic shaft rotor accumulated operation count up to the previous time stored in the storage area 22d of the SRAM 22. Then, after adding that it is newly used once (the previous accumulated operation count + 1), it is stored again (step 11).

  Next, the CPU 21 resets and initializes the 1-second timer (step 12). Next, it is confirmed whether the 1-second timer has passed 1 second (step 13). If 1 second has not elapsed, it is determined whether or not the drive unit 6 is stopped. If the drive unit 6 is rotating, the process proceeds to step 13 and circulates between step 13 and step 16 until the timer has elapsed for 1 second (step 16). Next, in step 13, if the timer has passed 1 second, the process proceeds to step 14.

  Next, the CPU 21 reads the elastic shaft rotor integrated operation time until the previous time stored in the storage area 22c of the SRAM 22, adds 1 second (previous integrated operation time + 1 second), and stores it again (step 14). Next, the 1-second timer is reset (step 15). Next, the operation state of the drive unit 6 is confirmed. If the drive unit 6 is in operation, the process returns to step 13 and the elastic shaft rotor integrated operation time is added until the drive unit 6 stops. If the drive unit 6 is stopped, the process returns to step 2 to monitor the start of rotation of the drive unit 6 (step 16).

  More specifically, when the power supply of the centrifuge 10 is turned on, the accumulated data up to the previous time stored in the storage areas 22a to 22f of the SRAM 22 shown in FIG. Copy to backup areas 23a-23f and save as backup data. Next, when the drive unit 6 starts to rotate, the rotor discrimination sensor 9 detects the identifier arranged in the rotor identification unit provided in the lower portion of the rotor, and discriminates the type of the rotor. The type (rotor identification number) of the discriminated rotor is discriminated, and the corresponding rotor information (specification) is selected from the rotor information data group 24a in the ROM 24 or the rotor control information data group stored in the EEPROM. get.

  Since the information on the drive shaft to be used is stored in advance in the acquired rotor information, the CPU 21 can determine the drive shaft used by the rotor 4 in operation. Increase the number of accumulated operations corresponding to the operation results of the drive shaft to be used by one.

  For example, if the rotated rotor is a high-rigidity axis rotor, the high-rigidity axis rotor integrated operation count data stored in the storage area 22b is read and added once and recorded again. . In the next step, every time the timer elapses, the high-rigidity shaft rotor integrated operation time stored in the storage area 22a is read, added by 1 second, re-recorded, and then the 1-second timer is reset. The accumulated operating time in seconds can be recorded for each axis that uses it. Similarly, in the case of the rotor for the elastic shaft, the elastic shaft rotor integrated operation count stored in the storage area 22c and the elastic shaft rotor integrated operation time stored in the storage area 22d are added according to the actual use.

  Further, the method of counting the accumulated time using the 1-second timer according to the above description is an example, and any method may be used as long as it is a means for measuring time. As a result, in the centrifuge having the rigid shaft and the elastic shaft, it is possible to accurately record the operation results for each drive shaft used. Therefore, maintainability is improved, and the operation results of the rigid shaft or the elastic shaft can be individually managed as compared with the conventional method in which the life time of the drive unit is simply determined by managing the number of accumulated operations and the accumulated operation time. Therefore, it is possible to set the accumulated number of times and the accumulated time of each bearing 34 and 35 in advance, and display an alarm for each bearing on the display unit 1b when the lifetime is reached. Can be replaced according to the operation results of the drive shaft, the drive unit 6 can be replaced before the elastic shaft is damaged, and the life is extended unless the operation is biased to either one. be able to.

  Further, in the centrifugal separator 10 of the present invention, the high rigidity shaft rotor integrated operation time, the high rigidity shaft rotor integrated operation number, the elastic shaft rotor integrated operation time, and the elastic shaft rotor integrated operation number stored in the storage regions 22a to 22d. Can be displayed on the display unit 1a.

  Further, by operating the switch of the operation unit 1b, the display of the high-rigidity shaft rotor integrated operation time, the high-rigidity shaft rotor integrated operation number, the elastic shaft rotor integrated operation time, and the elastic shaft rotor integrated operation number can be switched. Furthermore, it can be connected to a storage device such as an external personal computer or a device having a display unit via the external connection terminal 28, and data can be transmitted and received.

FIG. 9 shows an example of the display unit of the conventional centrifuge 10.
10 and 11 show an embodiment of the display unit of the centrifuge 10 of the present invention. The centrifuge 10 has various operation functions. For example, a so-called pulse operation in which the operation is continued only while the pulse switch arranged in the operation unit 1b is pressed, or operation conditions are stored in a memory in advance. In addition, so-called program operation (sometimes referred to as “memory operation”) that calls and operates as needed, RCF operation that performs operation by setting centrifugal acceleration instead of the rotational speed that is the operating condition of the centrifuge, etc. These operations are stored in the control device 20, and the control device 20 is configured to control the centrifuge 10 according to various operation functions.

  FIG. 12 is a flowchart of an embodiment of the recording process of the driving performance by driving function of the present invention. First, it waits until the drive part 6 starts rotation (step 1). When the drive unit starts rotating, it is determined in steps 2 to 4 whether the operation function is a pulse operation, a program operation, an RCF setting operation, or a normal operation. If it is determined in step 2 that the operation is a pulse operation, the number of accumulated pulse operations in the storage area 22g in the SRAM 22 is read and the fact that the pulse operation has been performed once is added (the previous operation accumulated number + 1) (step 5). ).

  If it is determined in step 3 that the program operation is performed, the program operation integration number in the storage area 22h in the SRAM 22 is read, and the fact that the program operation has been performed once is added (previous operation integration number + 1) (step 6).

If it is determined in step 4 that the RCF operation is performed, the cumulative number of RCF operations in the storage area 22i in the SRAM 22 is read, and the fact that the program operation has been performed once is added (previous operation accumulated number + 1) (step 7). In Steps 1 to 4, if it is not determined to be pulse operation, program operation, or RCF operation, it is determined to be normal operation.
Next, it is determined whether or not the drive unit 6 has stopped. If not, step 8 is circulated. If it is determined that the drive unit 6 has stopped, the process returns to step 1 (step 8). As described above, by increasing the numerical values of the corresponding storage areas 22g to 22i in accordance with the operation results, the cumulative number of operations can be recorded for each operation function.

  In the centrifuge 10 of the present invention, since the operation results of various operation functions can be individually recorded, it is possible to grasp the usage method and usage pattern of the user. By performing maintenance management according to this method of use and usage pattern, it is possible to perform preventive maintenance for the optimal failure of each centrifuge, and at the same time centrifuge required for investigating the cause of the failure and preventing recurrence Since the information on the usage status of can be obtained with high accuracy, maintainability is improved.

  As another effect, this function can be used to find the operation function with the highest frequency of use by the user, so the operation function with the highest operating performance is the first when the centrifuge is turned on. It can be displayed on the screen, and usability can be improved. For example, instead of selecting from the operation function list 40 as shown in FIG. 9 with the operation unit 1b, as shown in FIG. 10 and FIG. The control device 20 can control the input screen such as the input screen 41 and the RCF operation input screen 42 to be started up after the centrifuge 10 is turned on.

  Furthermore, in the centrifuge 10 of the present invention, the pulse operation integration count, the program operation integration count, and the RCF operation integration count stored in the storage areas 22g to 22i can be displayed on the display unit 1a.

  Further, by operating the switch of the operation unit 1b, the display of the pulse operation integration number, the program operation integration number, and the RCF operation integration number can be switched. Furthermore, it can be connected to a storage device such as an external personal computer or a device having a display unit via the external connection terminal 28, and data can be transmitted and received.

  Furthermore, the accumulated time of the drive time of the refrigerator 5 controlled by the control device 20 is stored in the SRAM, which leads to improvement in the maintenance of the centrifuge.

These are block diagrams which show the structure of the centrifuge for implementing this invention. These are the block diagrams of the storage area of SRAM in this invention. These are the block diagrams of the storage area of the EEPROM in this invention. Shows a configuration example of a door switch. These are the flowcharts which show one Example of the cumulative opening / closing performance record processing of the door which becomes this invention. These are the flowcharts which show one Example of the door open and door closed state integrated time recording process in the motor stop which becomes this invention. These are sectional drawings of the drive device of the centrifuge of the present invention. These are the flowcharts which show one Example of the driving performance record processing classified by drive axis which becomes this invention. Is an example of a display unit of a conventional centrifuge These are one Example of the display part of the centrifuge of this invention. Is another embodiment of the display unit of the centrifuge of the present invention. These are the flowcharts which show one Example of the recording process of the driving performance according to function which becomes this invention.

Explanation of symbols

1 is an operation panel, 1a is a display unit, 1b is an operation unit, 2 is a door, 2a is a door hook,
3 is a rotating chamber, 4 is a rotor, 5 is a refrigerator, 6 is a drive unit, 7 is a temperature sensor, 8 is a door switch,
8a is a switch unit, 8b is a button, 8c is a terminal, 8d is a terminal, 8e is a spring, 8f is a hinge lever, 9 is a rotor discrimination sensor, 15 is a table, 20 is a control device, 21 is a CPU, 22 is an SRAM, 23 Is an EEPROM, 24 is a ROM, 24a is an information storage area by rotor number, 25 is a battery, 26 is a drive circuit, 27 is a personal computer, and 28 is an external connection terminal.

Claims (7)

A drive unit, a rotor rotated by the drive unit, a rotation chamber that receives the rotor, a door that is located above the rotation chamber and that can be opened and closed, and a control unit that controls the drive unit And a centrifuge having an indicator for displaying an operation state,
A centrifuge having storage means for storing the use record of the control unit, and displaying the use record stored in the storage unit on the display unit. 2. The centrifugal separator according to claim 1, wherein the storage means stores the number of operations for each RCF operation, program operation, or pulse operation as the actual use. The centrifuge according to claim 1 or 2, wherein an operation time for each RCF operation, program operation, or pulse operation is stored in the storage means as the usage record. 4. The centrifuge according to claim 3, wherein the display unit switches and displays the number of times of operation and the operation time stored in the storage unit by a switching unit. A drive unit, a rotor rotated by the drive unit, a rotation chamber receiving the rotor, a door positioned above the rotation chamber and arranged to be openable and closable, and a control for controlling the drive unit And a centrifuge having a display for displaying the operating state,
A centrifuge having storage means for storing a use record of the control unit, and an output means for outputting the use record stored by the storage means to the outside. 6. The centrifuge according to claim 5, wherein the storage means stores the number of operations for each RCF operation, program operation, or pulse operation as the usage record. The centrifuge according to claim 5 or 6, wherein an operation time for each RCF operation, program operation, or pulse operation is stored in the storage means as the usage record.

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