JPS63302852A - Sterilizing apparatus - Google Patents

Abstract

PURPOSE:To perform high temp. sterization, by providing an ultraviolet ray irradiation source, an electric heater source, and a timer circuit to control the driving of a fan for stirring the air in the chamber together with a fan for sucking the air in the chamber and to control the opening degree of a ventilation hole, while whole of the above is encased in a chamber hermetically closable by a airtight door. CONSTITUTION:A utensil 13 to be sterilized is placed on a shelf 12 and a door 2 is closed to hermetically close the chamber part 3 of a main body 1 and, when a timer 16 is set to 30min-operation to close a power source switch 17, a current is supplied to a heater 7 and the chamber part 3 reaches about 150 deg.C to perform sterilizing action. A stirring fan 9 is driven to uniformize the heating state. An ultraviolet lamp 4 is also allowed to light to irradiate the chamber part 3 with ultraviolet rays. When 15min is elapsed, the supply of a current to the heater 7 is stopped and a cooling fan 8 is driven and low temp. air is sucked in the chamber part 3 from a suction hole 11 while the heated air is discharged to the outside from a discharge hole 10 and the temp. of the chamber part 3 falls to the almost atmospheric temp. after 30min. After 30min. is elapsed, the supply of a current to all of circuits is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sterilizing device, and more particularly to a device for sterilizing medical instruments, household instruments, etc., using ultraviolet irradiation and an electric heater.

[Prior Art] Various methods have been used for sterilization, but
Small-sized sterilizers for medical instruments, household instruments, etc. have been desired. For this reason, as a sterilizer for such uses, a device has been used that sterilizes instruments by filling water inside a housing, heating it, and boiling it.

[Problems to be solved] However, in the above-mentioned conventional sterilizer that uses boiling, the degree of heating of water cannot be increased very much, so the temperature inside the housing remains at about 100°C. There was no material that met the WHO (World Health Organization) heat sterilization standard for heating at 120°C for 20 minutes against the AIDS virus.

Also, it takes a long time to boil (for example, about 1 hour) to reach the maximum temperature, so the work time is long.

There was a problem that it could not be used for materials with low heat resistance, such as plastic.

Furthermore, there is a problem in that the operator may be exposed to hot air when opening the door of the flute body.

[Means for solving problems] The present invention has been made in view of the above-mentioned conventional problems, and has the following features:
The purpose of the present invention is to provide a sterilizer that enables high temperature sterilization at about 50°C, shortens the sterilization work time, and can be used for low heat resistant instruments such as plastics.

As a means for achieving the above object, the sterilizer according to the present invention includes an ultraviolet irradiation source, an electric heater source, a fan for indoor air stirring, and an indoor air sterilization device, which are installed in a housing whose interior can be sealed with an opening/closing door. A suction fan and a vent are provided, and a timer circuit is provided to control the driving of the ultraviolet ray irradiation source, the electric heater source, and the opening and closing of the vent.

[Example] Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a perspective view showing an embodiment of the present invention with the door open. 1 in Fig. 1 is the main body, which has the shape of a casing, and the indoor interior 3 can be sealed with a rotatably attached door 2. It looks like this.

In the indoor interior 3 of the main body 1, two ultraviolet lamps 4 are arranged on the upper wall surface and the lower wall surface, respectively, so that the indoor interior 3 can be irradiated with ultraviolet light. Further, although not shown in FIG. 1, a heater 7 is provided between the inner wall 5 forming the indoor interior 3 of the main body 1 and the outer wall 6 of the main body 1 to heat the air in the indoor interior 3. It is now possible to do so.

In the figure, 8 is a cooling fan, 9 is a stirring fan, 10 is an exhaust hole,
11 is an intake hole. Cooling fan 8.

It is for introducing outside air into the indoor interior 3, and is arranged on the inner wall 5''W side, and is connected to the intake hole 11. Also, the stirring fan 9 stirs the air in the indoor interior 3 and supplies it to the indoor interior. This is to equalize the temperature of the exhaust hole 10 and the intake hole 11.
are opened and closed by solenoids. Note that the positions of both fans 8 and 9 and the exhaust hole 10 (the position of the intake hole 11 depends on the position of the cooling fan 8) can be determined as appropriate, but since the exhaust hole 10 is for discharging heated air to the outside. , a position above the indoor interior 3 is desirable.

In the figure, reference numeral 12 denotes a shelf, which has two levels in the illustrated example, and can accommodate 41 instruments 13 to be sterilized, such as scalpels and syringes. Further, in Figure 2, 14 is a temperature sensor, and 15 is a thermometer, so that the internal temperature can be checked from the outside with the door 2 closed. Furthermore, 16 in the figure is a timer, 1
Reference numeral 7 indicates a power switch, and reference numeral 18 indicates a lamp, which includes, for example, an orange lamp 18a and a green lamp 18b for instructing opening/closing of the door 2.

Fig. 2 shows the control circuit of the example shown in Fig. 1, in which the above-mentioned power switch 17 and timer contactor 16a are inserted in series on the positive terminal side of the power line, and various circuits are connected in parallel between the positive and negative power supplies. It is connected. That is, a heater circuit consisting of a normally open relay contact (Mg) 19, a heater (R) 7, and a temperature fuse 20 is connected to the side closest to the power supply terminal, and then a timer contact 16b, a thermal relay 21 . Drive coil (Mg) 22 for relay contact 19
A timer circuit consisting of a normally closed relay contact (Mg) 23, a solenoid drive coil (SOLI) 24 that opens and closes the exhaust hole 10 connected in parallel, a solenoid drive coil (SOL2) 25 that opens and closes the intake hole 11, and A circuit consisting of a motor 26 for driving the cooling fan, and a motor 27 for driving the stirring fan 9. Furthermore, each of the four ultraviolet lamps 4 has a lighting tube 28. A circuit made up of safety devices 29 connected in series is connected in parallel in sequence. Note that the orange lamps 18a and 18b indicating the opening and closing of the door 2 are branched from the positive terminal side of the timer contact 16b and connected in parallel to the door switch 30, and the door switch 30 is connected in series to the negative terminal side of the power line. It is.

Next, the operation of the wooden embodiment when sterilization is performed by heating and ultraviolet irradiation along the diaphragm as shown in FIG. 5 will be described. In this example, the timer 16 is a 30 minute timer, and the timer contacts le& for the power switch 17 are 30 minutes.
After 15 minutes, the timer contact 16b for the relay contact drive coil 22 is turned off after 15 minutes. Further, when the timer is set for only 15 minutes, the timer contact 16b is ONI and not present.

Further, it is assumed that the thermal relay 21 is turned on and off at 150°C±10°C.

First, open the door 2, place the utensils 13 to be sterilized on the shelf 12, close the door 2 to seal the interior 3 of the main body 1, set the timer 16 to operate for 30 minutes, and turn on the power switch 17. do. Note that even if the power switch 17 is turned on with the door 2 open, the door switch 30 is still OFF.
Each element is not energized.

When the power switch 17 is turned on, the relay contact 19 is turned on by excitation of the coil 22, and the other relay contact 23 is turned on.
becomes OFF. Then, the heater 7 is energized, and the temperature of the air inside the room 3 of the main body 1 rises rapidly due to the heating from the wall, reaching about 150° C. after about 5 minutes. When the internal temperature of the room 3 exceeds 150° C., the thermal relay 21 is activated to turn off the power to the coil 22, and the relay contact 19 is also turned off, cutting off the power to the heater 7. As a result, when the internal temperature falls below 150° C., the thermal relay 21 is activated again to turn on the coil 22, turning on the relay contact 19 and energizing the heater 7, thereby performing the sterilizing action by heating again. This operation is repeated until the timer contact 16b is turned off after 15 minutes.

On the other hand, when the power switch 17 is turned on, the motor 26 rotates and drives the stirring fan 9 to stir the air inside the room 3.
Uniform heating condition. Further, the ultraviolet lamp 4 is also turned on when the power switch 17 is turned on, and the entire interior of the room 3 is irradiated with ultraviolet rays.

When 15 minutes have elapsed after turning on the power switch 17, the timer contact 16b is turned off, and the relay contact 19 is turned off due to demagnetization of the coil 22, and the power supply to the heater 7 is stopped. On the other hand, due to the demagnetization of the coil 22, the relay contact 23
is ON.

The excitation of the coil 24 drives the solenoid to open the exhaust hole 10, the excitation of the coil 25 drives the solenoid and opens the intake hole 11, and the rotation of the motor 27 drives the cooling fan 8 to open the intake hole 11. While low-temperature air (atmospheric temperature) is sucked into the interior 3 of the main body 1, heated air is discharged to the outside from the exhaust hole 10. As a result, the temperature of the interior 3 of the main body 1 changes as shown in FIG. Approximately 3 as shown in
After 0 minutes, the temperature drops to almost atmospheric temperature. The ultraviolet lamp 4 is
The light is kept on during this cooling process, and sterilization by ultraviolet irradiation is carried out for 30 minutes. Further, the stirring fan 9 also continues to rotate for 30 minutes.

Then, 30 minutes after turning on the power switch 17, the timer contact 16a is turned off, power supply to all circuits is stopped, and the sterilization process is completed. At this time, the temperature inside the room 3 has fallen to the atmospheric temperature, so even if the door 2 is opened, no hot air is blown out.

The above explanation was an example in which heat sterilization and ultraviolet irradiation sterilization are performed together, but for low heat resistant instruments such as plastics, if only the ultraviolet rays are irradiated in the latter half of the cooling section shown in Figure 5, thermal deformation will occur. It can be sterilized without any problems. Further, the heating temperature can be freely varied by selecting the performance of the heater, and is not limited to 150° C. as shown in the figure.

[Effects of the Invention] Since the sterilizer of the present invention is as described above, it can be sterilized at high temperature in a shorter time than before, and is small and flexible, and can disinfect and sterilize AIDS virus, etc. The non-heat sterilization part is also suitable for sterilizing not only medical instruments but also household instruments.

[Brief explanation of drawings]

FIG. 1 is a front perspective view of an embodiment of the present invention showing the door in the open state, FIG. 2 is a control circuit diagram, FIG. 3 is a perspective view of the door in the closed state, FIG. 4 is a perspective view of the door in the open state, and FIG. 5 is a diaphragm diagram of the sterilization process. l: Main unit 2: Door 3: Indoor interior 4: Ultraviolet lamp 7: Heater 8: Cooling fan 9: Wll rough fan lO: Exhaust hole 11: Intake hole 12: Shelf

Claims (1)

[Claims] An ultraviolet ray irradiation source, an electric heater source, a fan for indoor air stirring, a fan and a vent for indoor air exhaust are provided in a housing whose interior can be sealed with an opening/closing door, and these ultraviolet irradiation sources, A sterilizer equipped with an electric heater source and a timer circuit that controls the drive of both fans and the opening and closing of the ventilation hole.