KR960011877B1 - Controlling method for fully automatic sterilising unit - Google Patents

Abstract

The method automates a series of processes of sterilizing medical instruments by using a microprocessor. The method comprises the steps of determining if the water level of a tank is normal, and generating an alarm sound if not normal; displaying a preset standard sterilization temperature and time, and increasing or decreasing the temperature and time; setting a water supply time, supplying the water for a sterilization chamber, and generating an alarm sound if not finishing the water supply within the set time; setting a heating time, actuating a heater, and also generating an alarm sound if not reaching a sterilization temperature within the set time; managing the sterilization temperature during a set time; discharging air if the sterilization time has elapsed; drying the chamber.

Description

Sterilization Control Method of Automated Autoclave Sterilizer

1 is a circuit diagram showing the configuration of a fully automatic autoclave sterilizer to which the sterilization control method of the present invention is applied.

2 (a) to (c) is a view showing a sterilization control method of the autoclave sterilizer according to the present method,

(a) is a signal flow diagram showing a main routine.

(b) is a signal flow chart showing the sterilization temperature and time setting routine of (a).

(c) is a signal flow diagram showing an interrupt routine.

(d) is signal flow chart for one touch automatic start / stop function.

The present invention relates to a sterilization control method of a full-automatic autoclave sterilizer for controlling sterilization of various instruments requiring sterilization, including medical instruments used in hospitals, and the like. It is to be done as.

In general, the autoclave sterilizer sterilizes certain instruments quickly and effectively while maintaining the major state at high pressure by saturated steam at high temperature. And a series of operations such as drying.

In the autoclave sterilizer which performs such an operation, in the past, when water is supplied to the chamber, the user must adjust the temperature while checking the water level with the naked eye. Invention of heater and temperature control and sterilization disinfection time are set manually with a controller etc., so heating and sterilization are performed manually. Therefore, heating and sterilization cannot be performed by manually setting the desired sterilization disinfection time. There was a problem that the operation was required to set up a disturbance, and the effect of sterilization disinfection was low due to such a bad manual setting function and a set sterilization condition control operation.

The present invention has been made to solve the above-mentioned conventional problems, such as to automatically perform a series of operations to sterilize using a microprocessor as well as the user to set the sterilization temperature and sterilization time at the same time When press start / stop key, water is automatically supplied to the set water level in the chamber, and the heater is heated to raise the temperature in the chamber to the set sterilization temperature. Then, the sterilization temperature is controlled by controlling the heating of the heater during the set sterilization time. It is an object of the present invention to provide a sterilization control method which sterilizes a predetermined apparatus while maintaining, and exhausts the high pressure increase in the chamber when sterilization is completed, and allows drying according to the setting of drying.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram showing the configuration of an autoclave sterilizer to which the sterilization control method of the present invention is applied. The microprocessor (1) and the microprocessor (1) for controlling the pre-operation of sterilization and disinfection (CKECK) are controlled. The display unit (2) displays messages such as set sterilization temperature, sterilization time, progress operation and error, fixed number and completion of autoclave sterilizer, and inputs commands such as sterilization temperature, sterilization time, drying execution and start / end. The key input unit 3 and the temperature detector 4 for detecting the temperature in the chamber, the reservoir tank water level detector 5 and the chamber water level detector 6 for detecting the water level in the reservoir tank and the chamber, and the closing of the door The door closing detection unit 7, the water supply control unit 8 for supplying the water of the water storage tank into the chamber, the exhaust control unit 9 for exhausting the high pressure steam in the chamber, and the sterilization and drying are performed while controlling the heating of the heater. Annihilation The disinfection / drying control unit 10, the overheat prevention unit 11 to prevent overheating, the alarm unit 12 which outputs an alarm sound when the occurrence of an error, drying and sterilization is completed, and the operation of the autoclave sterilizer. Internal memory 1-1 of the microprocessor 1 for storing and outputting various programs and predetermined data required, a message display unit 2, drying time setting (external), alarm sound selection, and water level leakage ( It consists of an expansion I / O unit 13 (I / O PORT EXPANDER) having an input / output expansion function of 5 and 6).

In the sterilization control method of the present invention applied to the autoclave sterilizer configured as described above, as shown in FIG. 2 (a), it is determined whether the water level of the storage tank is normal when the power is on, and if it is not normal, the display unit 2 ERR1 message is displayed at the same time and the alarm unit 12 notifies that the water level of the reservoir tank that emits an alarm sound is not normal, and then stops when the input / stop signal of the key input unit 3 is input. The error display stops when the water level becomes normal.

On the other hand, when the water level of the reservoir tank is normal, the display unit 2 displays the initial standard sterilization set temperature and the standard sterilization time. For example, 121 ° C./20 minutes is set and displayed on the display unit 2 simultaneously, and sterilization temperature and time setting routine are performed.

In the sterilization temperature and time setting routine, as shown in (b) of FIG. 2, the set sterilization temperature and sterilization time are set at 121 ° C./20 minutes, and then the selection key of the key input unit 3 is pressed. 121 ° C./20 minutes → 126 ° C./15 minutes → 132 ° C./5 minutes → 121 ° C./20 minutes are sequentially set in sequence and displayed on the display unit 2 simultaneously.

Here, 121 ° C./20 minutes, 126 ° C./20 minutes, and 132 ° C./5 minutes represent standard sterilization silver and sterilization time for sterilization.

When the temperature increasing key and the temperature decreasing key of the key input unit 3 are selectively pressed, the temperature is increased and subtracted by 1 ° C from the currently set sterilization temperature, set and displayed on the display unit 2, and the time increasing key and time decreasing key are displayed. In the case of selectively pressing, one minute is added and subtracted from the currently set sterilization time, and it is displayed on the display unit 2.

As described above, when the sterilization temperature and the sterilization time are set by performing the sterilization temperature and time setting routine, the drying function is set and released according to the input of the drying key, and the sterilization equipment is put into the autoclave and the door is closed. The operation detection such as the safety sealing of the door turns on the ready indicator lamp when the closing of the door is detected by the detection sensor and the switch of the door closing detection unit 7 to indicate that the preparation for sterilization is completed.

When the user presses the start / stop key of the key input unit 3 in this state, the microprocessor 1 turns off the ready lamp of the display unit 2, turns on the water supply lamp, and supplies water from the reservoir tank to the chamber. In addition to controlling the water supply control unit 8 and the exhaust control unit 9 to supply water in the chamber and to perform the exhaust operation, that is, the air vent (Air Vent) function to discharge the air (Air), The output signal of the chamber level detection unit 6 determines whether the level in the chamber is settled.

At this time, if the water level in the chamber is not normal, it is determined whether or not the set water supply time, that is, 5 minutes has elapsed. If the water supply time has not elapsed, the water supply operation is continuously performed. In this case, it is determined that an error has occurred in the water supply piping system, the Err5 message is displayed on the display unit 2, and a path is output to notify the occurrence of an error. When the start / stop key is input, the path is stopped and the initial state is displayed. Return to.

When the water level of the chamber reaches a normal level before the set water supply time has elapsed, the microprocessor 1 causes the water supply lamp of the display unit 2 to turn off, turns on the heating lamp, and displays the execution of the heating operation. The exhaust valve is closed and the heater generates heat to heat the water supplied to the chamber.

In this state, it is determined whether the temperature in the chamber reaches the set sterilization temperature, and if the sterilization temperature is not reached, it is determined whether the preset heating time, that is, 45 minutes has elapsed, and continuously generates the heater when the 45 minutes have not elapsed. If the sterile temperature does not reach the set sterilization temperature even after the heating time has elapsed, it is determined that an error has occurred due to the heating of the heater and the Err6 message is displayed and alarmed on the display unit 2, and then the start / stop key is input. If it stops alarming, it returns to initial state.

On the other hand, if the temperature in the chamber reaches the set sterilization temperature before the set heating time has elapsed, the heating lamp is turned off, the sterilizing lamp is turned on to indicate the sterilization operation is performed, and the temperature detection unit ( 4) by detecting the temperature in the chamber, sterilization is performed while maintaining the sterilization temperature by controlling the heating of the heater in accordance with the detected temperature, wherein the temperature in the chamber deviation of the sterilization temperature more than ± 4 ℃, that is, The invention of the set sterilization temperature If an error occurs within ± 4 ℃ at the sterilization temperature by performing sterilization within the range, it is determined that an error will occur, and the Err4 message is displayed on the display unit (2), and an alarm sound is output. If a key is pressed, the alarm is stopped and the unit returns to its initial state.

And the sterilization temperature set during the disodium sterilization time. When sterilization is completed while maintaining the range, the sterilization lamp is turned off, the exhaust lamp is turned on, and the exhaust valve is opened by the exhaust control unit 9 to exhaust the gas. If it is not set, the exhaust lamp is turned off, and if it is not set, the completion lamp is turned on. If the drying is set, the drying operation warning alarm is issued to perform the drying operation. The lamp is turned off and the drying lamp is turned on to control the heater to perform the drying operation for a set drying time, for example, 30 minutes or 45 minutes.When the drying time has elapsed, the drying lamp is turned off and the completion lamp is turned on to complete sterilization. Is displayed.

In this way, when the sterilization is completed, the alarm for completion control alarm is sounded, the end message is displayed on the display unit 2, and when the door is opened, the sterilization temperature and time set initially are displayed, and then the next sterilization operation waits. Be prepared to be.

Meanwhile, (c) and (d) of FIG. 2 show signal flow diagrams for an interrupt routine and a one-touch automatic operation start / stop function performed by the microprocessor 1 at regular intervals, and as shown in FIG. The heater overheat prevention sensor determines whether the temperature in the chamber and the surface is over 150 ℃, which is the overheating temperature.If the overheating temperature is over, the Err2 message is displayed on the display unit 2 and the alarm sound is turned on. It displays overheating and stops alarm when start / end key is input and returns to normal operation only when it is lowered to normal temperature.

As described in detail above, the present invention allows the user to easily set sterilization temperature and sterilization time, and can automatically eliminate water inconvenience by performing water supply, heating, sterilization and exhaust operation, and accurately sterilization during the set time. This has the effect of improving the efficiency of sterilization.

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Claims (1)

Under the control of the microprocessor 1, it is determined whether or not the water level of the water storage tank is normal. If the water level of the water storage tank is not normal, the corresponding matter is displayed and alarmed through the display unit 2 and the alarm unit 12. In case of water level, the first section manager performs the following process, and if the water level is normal in the first process, the sterilization temperature and sterilization time are set according to the user's operation. A second step of sequentially setting and displaying a sterilization time and setting the sterilization temperature according to the press of the temperature increasing key and the temperature decreasing key, and increasing or decreasing the sterilization time according to the press of the time increasing key and the time decreasing key; When the setting operation is completed in step 2 and the door closing detection unit 7 detects the closing of the door, and presses the start / stop key, water is supplied into the chamber. A third process of displaying and alarming an error through the display unit 2 and the alarm unit 12 when the water supply is not completed for a predetermined and set water supply time; and heating the heater when water is supplied to the set water level in the third process. And a fourth process of displaying and alarming an error through the display unit 2 and the alarm unit 12 when heating to a set sterilization temperature but setting a heating time in advance and not reaching a sterilization temperature during the set heating time. Sterilization is performed while maintaining the sterilization temperature for the set sterilization time when heated to the sterilization temperature in the process, but if the deviation occurs over the set temperature ± 4 ℃ from the set sterilization temperature, the display unit (2) and the alarm unit (12) A fifth process of displaying and alarming through the second process, a sixth process of exhausting to a set temperature by the control operation of the exhaust control unit 9 when the sterilization time has elapsed in the fifth process, and the sixth process of The seventh process of performing the drying operation by the control operation of the drying control unit 10 according to whether or not the drying setting is completed, and when the temperature in the chamber is higher than the set overheating temperature by the operation of the temperature detector 4, the display unit (2). And an eighth process of performing the normal operation by controlling the respective circuit parts when the return to the normal temperature after the display and alarm through the alarm unit 12 and the automatic pressure autoclave sterilizer, characterized in that Sterilization control method.