JP2017080295A - Sterilization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scheme for reducing concentration of a sterilizing agent entering a sterilizing chamber through a passage by setting a catalyst to decompose the sterilizing agent in the passage through which air contained in a liquid reservoir is sucked into the depressurized sterilizing chamber.SOLUTION: A sterilization apparatus for sterilizing an object in a sterilizing chamber using a sterilizing agent includes a liquid reservoir to store the liquid sterilizing agent, the sterilizing chamber to contain the object, a first passage through which the liquid sterilizing agent stored in the liquid reservoir is introduced to the sterilizing chamber, a second passage through which a gas in the liquid reservoir is sucked into the sterilizing chamber before the liquid sterilizing agent stored in the liquid reservoir is introduced to the sterilizing chamber, and a catalyst for decomposing a sterilizing component in the sterilizing agent that is set in the second passage.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sterilization apparatus. In particular, by providing a catalyst that decomposes the sterilizing agent in the path for sucking out the air contained in the liquid reservoir into the sterilized chamber whose pressure has been reduced, the sterilization that makes it possible to reduce the concentration of the sterilizing agent that enters the sterilizing chamber from the path. Relates to the device.

  Medical instruments such as syringes and surgical tools cannot be reused because pathogens may adhere to them unless they are sterilized after use, which may adversely affect the human body. For this reason, there are sterilization apparatuses that sterilize objects that require sterilization, such as medical instruments.

As one of the sterilization apparatuses, a sterilization apparatus and a sterilization method for sterilizing an object using hydrogen peroxide as a sterilizing agent have been proposed (for example, Patent Document 1).
JP-T-08-505787

  However, conventionally, the air contained in the liquid reservoir in which the liquid sterilant is stored is transferred to the depressurized sterilization chamber through a path (path 2) different from the path for introducing the liquid sterilant (path 1). After sucking out, the liquid sterilant stored in the liquid reservoir is sterilized by introducing the liquid sterilant into the sterilization chamber via the path for introducing the liquid sterilant (path 1). In the route (route 2) different from the route for introducing the liquid sterilant (route 1), the time during which the pressure is reduced from the atmospheric pressure during the sterilization process is relatively long.

  Therefore, for example, together with the air contained in the liquid reservoir, the sterilizing agent vaporized in the liquid reservoir is sucked into the sterilization chamber, but another route (path 2) is compared with the time when the pressure is reduced from the atmospheric pressure. Therefore, the valve provided in the path 2 may be cooled, and the vaporized sterilizing agent may condense and solidify.

  After that, after the sterilization process, the other path (path 2) is not depressurized, so that it may gradually melt and fall into the sterilization chamber.

  Accordingly, an object of the present invention is to provide a catalyst for decomposing a sterilizing agent in a path for sucking out air contained in a liquid reservoir into a sterilized chamber whose pressure has been reduced, thereby providing a concentration of the sterilizing agent that enters the sterilizing chamber from the path. It is to provide a mechanism that makes it possible to reduce this.

  The present invention is a sterilization apparatus for sterilizing an object in a sterilization chamber using a sterilizing agent, the reservoir for storing a liquid sterilant, the sterilization chamber for storing the target, and the reservoir in the reservoir A first path for introducing the liquid sterilizing agent into the sterilization chamber, and sucking the gas in the reservoir into the sterilization chamber before introducing the liquid sterilant stored in the reservoir into the sterilization chamber And a catalyst for decomposing a sterilizing component of the sterilizing agent provided in the second path.

  According to the present invention, by providing a catalyst for decomposing a sterilizing agent in a path for sucking out air contained in the liquid reservoir into a sterilized chamber having a reduced pressure, the concentration of the sterilizing agent entering the sterilizing chamber from the path can be reduced. Can be made.

It is the figure which showed typically the external view of the sterilizer which concerns on this embodiment. It is a figure which shows an example of the structure of the hardware of the sterilizer which concerns on this invention. It is a figure which shows an example of the screen displayed on the display part 102 of the sterilizer 100. FIG. It is a figure which shows an example of each process of the sterilization process by the sterilizer which concerns on this invention. It is a figure which shows an example of the detailed process of the sterilization process shown to S111 of FIG. It is a figure which shows an example of the detailed process of the pre-sterilization process shown to S501 of FIG. It is a figure which shows an example of the detailed process of the sterilization process shown to S502 of FIG. It is a figure which shows an example of the detailed process of the ventilation process shown to S503 of FIG. It is a figure which shows an example of the detailed process of the sterilization discharge | emission process shown to S114 of FIG. It is a figure which shows an example of sectional drawing of the conduit | pipe provided between the valve (V3) 212 and the sterilization chamber 219. It is a figure which shows an example of the cartridge attachment request | requirement screen 1101 displayed on the display part 102 of the sterilizer 100. FIG.

  The sterilization apparatus and sterilization method of the present invention will be described with reference to the drawings.

<Description of FIG. 1>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram schematically showing the appearance of a sterilizer 100 according to this embodiment. The sterilization apparatus 100 is provided with a sterilant attaching / detaching door 101, a touch panel type display unit 102 (operation unit) such as a liquid crystal display, a printing unit 103, and a sterilization chamber door 104. FIG. 1A illustrates a state where the sterilization chamber door 104 and the sterilizing agent attaching / detaching door 101 are closed, and FIG. 1B illustrates that the sterilizing chamber door 104 and the sterilizing agent attaching / detaching door 101 are open. The state is illustrated.

  The sterilizing agent attaching / detaching door 101 is an openable / closable door used for attaching / detaching the cartridge 205 filled with the sterilizing agent to / from the cartridge storage chamber 228. As a sterilizing agent that can be filled in the cartridge 205, a hydrogen peroxide solution can be used, but not limited to an aqueous hydrogen peroxide solution, any liquid that can be sterilized is applicable to the present embodiment.

  The touch panel type display unit 102 is a display screen that can be used as an operation unit for instructing sterilization start or sterilization stop, or confirming the sterilization state during the sterilization process. The configuration of the display unit 102 is not limited to a liquid crystal display, and may be a display unit such as a CRT.

  The printing unit 103 is a printer for printing the history of sterilization processing and the result of sterilization processing on printing paper.

The sterilization chamber door 104 is a door that is used to put an object to be sterilized (an object to be sterilized) such as a medical instrument into and out of the sterilization chamber 219. When the sterilization chamber door 104 is opened, an object to be sterilized can be put into the sterilization chamber 219. When the sterilization chamber door 104 is closed, the sterilization chamber 219 becomes a closed space and is in a sterilizable state. The sterilization chamber 219 is a housing having a predetermined capacity, and can be evacuated by reducing the pressure while the sterilization chamber 219 is closed. The temperature in the sterilization chamber is provided so that it can be maintained in a predetermined temperature range during the sterilization process.
<Description of FIG. 2>

  Next, an example of the hardware configuration of the sterilizer according to the present invention will be described with reference to FIG.

  FIG. 2 is a diagram showing an example of the hardware configuration of the sterilization apparatus according to the present invention.

  The sterilization apparatus 100 according to the present invention includes a control unit (MPU or the like) 201, a display unit 102, a printing unit 103, a lock operation control unit 202, an extraction needle operation control unit 203, a cartridge mounting door 101, Liquid sensor 204, cartridge 205, RF-ID reader / writer 206, liquid feed rotary pump 207, concentration furnace 208, air feed pressurization pump 209, intake HEPA filter 210, valve (V 1) 211 The valve (V3) 212, the catalyst 213, the liquid reservoir 214, the valve (V2) 215, the vaporizer 216, the valve (V5) 217, the valve (V9) 227, and the valve (V7) 226. A sterilization chamber (also referred to as a vacuum chamber) 219, an air feed vacuum pump 220, an exhaust HEPA filter 221, a sterilizing agent decomposing device 222, and a liquid feed rotary pump 223 And a exhaust evaporation furnace 224..

  The sterilizer 100 is a device that takes out the sterilant from the cartridge 205 containing the sterilant and sterilizes the object.

  A control unit (MPU or the like) 201 performs arithmetic processing and controls each hardware constituting the sterilization apparatus 100.

  The display unit 102, the printing unit 103, and the cartridge mounting door 101 have already been described with reference to FIG.

  The lock operation control unit 202 is a unit that performs the operation of locking and unlocking the cartridge mounting door 101. By locking the cartridge mounting door 101, the cartridge mounting door 101 is prevented from being opened, and the cartridge mounting door 101 is opened. By unlocking the mounting door 101, the cartridge mounting door 101 can be opened.

  The cartridge 205 is a sealed container filled with a sterilizing agent (hydrogen peroxide or a hydrogen peroxide solution liquid). An RF-ID storage medium is provided below the cartridge 205. The storage medium includes a serial number as information for identifying the cartridge, the date of manufacture of the cartridge, and the first cartridge. The date and time (first use date and time) used in the sterilizer and the remaining amount of the sterilant filled in the cartridge are stored.

  This RF-ID is a storage medium that stores data related to the disposal of the sterilant in the cartridge 205 (serial number, date of manufacture, date of first use, all remaining amount of sterilant, or any data). is there.

  The extraction needle operation control unit 203 is a unit that operates the extraction needle to puncture the extraction needle (injection needle) for aspirating the sterilizing agent in the cartridge from the top of the cartridge.

  That is, when an extraction needle (injection needle) for aspirating the sterilizing agent in the cartridge is inserted from the upper part of the cartridge, the extraction needle (injection needle) is directed toward the cartridge and operated to be lowered from the upper part of the cartridge. Thus, the extraction needle (injection needle) can be inserted from the top of the cartridge. When the extraction needle (injection needle) is removed from the cartridge, the extraction needle (injection needle) can be removed from the cartridge by operating to raise the extraction needle (injection needle) above the cartridge.

  The extraction needle is a straw (thin cylinder) for sucking the sterilant in the cartridge.

  The liquid sensor 204 checks whether the liquid sterilizing agent in the cartridge 205 passes through a pipe (conduit) that is connected (connected) to the liquid feed rotary pump 207 and the liquid feed rotary pump 223 from the extraction needle (injection needle). It is a device to detect. Specifically, it is possible to detect whether a sterilant passes through the tube from a spectrum obtained by irradiating the tube with infrared rays.

  The RF-ID reader / writer 206 is a device that can read the serial number, the date of manufacture, the date of first use, and the remaining amount of sterilant from the RF-ID provided on the lower side of the cartridge 205. Further, the device can write the date and time of initial use and the remaining amount of sterilizing agent from the RF-ID reader / writer 206 to the RF-ID provided on the lower side of the cartridge 205. The RF-ID reader / writer 206 is installed at the lower part of the cartridge mounting location behind the cartridge mounting door 101, and reads the RF-ID provided on the lower side of the cartridge 205. Data such as the date and time of first use and the remaining amount of sterilant can be written in the RF-ID.

  The liquid feed rotary pump 207 is connected (connected) to the concentrating furnace 208 via a conduit, and is also connected to the liquid sensor 204 via a conduit. The liquid feed rotary pump 207 is a device that sucks the liquid sterilant in the cartridge 205 with a pump and sends the sterilant through a conduit to the concentration furnace 208. Further, the liquid feeding rotary pump 207 can suck a predetermined amount of the sterilizing agent from the cartridge 205 in cooperation with the liquid sensor 204.

  The concentrating furnace 208 is electrically connected to the liquid feed rotary pump 207, the air feed pressurization pump 209, the liquid reservoir 214, and the exhaust HEPA filter 221 through conduits. The concentrating furnace 208 heats the sterilizing agent sent from the liquid feed rotary pump 207 through the conduit using a heater, and evaporates (vaporizes) moisture contained in the sterilizing agent to concentrate the sterilizing agent. Further, the vaporized water is pushed out to the conduit connected to the exhaust HEPA filter 221 by the air sent through the conduit from the pneumatic pressurizing pump 209 and exhausted from the concentration furnace 208. A valve (1) 211 is provided between the conduit between the liquid reservoir 214 and the concentration furnace 208.

  The air pressure pressurizing pump 209 is electrically connected to the concentrating furnace 208, the intake HEPA filter 210, and a conduit. The air feed pressurization pump 209 is a device that conducts the outside air (air) of the sterilizer 100 through the intake HEPA filter 210 through a conduit with the intake HEPA filter 210 and sends it to the concentrating furnace 208.

  The intake HEPA filter 210 is electrically connected to each other by a pneumatic pressure pump 209, a sterilization chamber 219, a vaporization furnace 216, and a conduit. The inhalation HEPA filter 210 filters dust, dust, germs, and the like in the outside air (air) outside the sterilization apparatus 100 with a HEPA (High Efficiency Particulate Air Filter) filter to clean the air. Then, the cleaned air is sent to the concentrating furnace 208 through a conduit by an air feeding and pressure pump 209. Further, the purified air is conducted through a conduit with the vaporizing furnace 216 and sent to the vaporizing furnace 216, or conducted through a conduit with the sterilization chamber 219 and sent into the sterilization chamber 219. That is, the intake HEPA filter 210 is electrically connected to the outside air (air) outside the sterilizer 100. Therefore, a conduit between the air feed pressurization pump 209 and the intake HEPA filter 210, a conduit between the sterilization chamber 219 and the intake HEPA filter 210, and between the vaporizer 216 and the intake HEPA filter 210 are provided. The conduit is in communication with outside air (air) via the intake HEPA filter 210.

  A valve (V9) 227 is provided in the conduit between the intake HEPA filter 210 and the vaporizing furnace 216. A valve (V 7) 226 is provided in the conduit between the intake HEPA filter 210 and the sterilization chamber 219.

  The valve (V1) 211 is a valve provided in a conduit between the concentrating furnace 208 and the liquid reservoir 214. By opening the valve, conduction by the conduit between the concentrating furnace 208 and the liquid reservoir 214 is established. It is a valve that enables the connection between the concentrating furnace 208 and the liquid reservoir 214 through a conduit by enabling and closing the valve.

  The valve (V 3) 212 is a valve provided in a conduit between the liquid reservoir 214 and the sterilization chamber 219, and opens the valve to conduct by the conduit between the liquid reservoir 214 and the sterilization chamber 219. It is a valve that enables the connection between the liquid reservoir 214 and the sterilization chamber 219 by closing the valve and disables the connection by the conduit.

  The catalyst 213 is provided in a conduit between the sterilization chamber 219 and a valve provided in a conduit between the liquid reservoir 214 and the sterilization chamber 219.

  In this embodiment, the valve (V3) 212 is opened or closed to enable or disable the conduit between the liquid reservoir and the sterilization chamber.

  The liquid reservoir 214 is connected by conduits between the concentration furnace 208, the vaporization furnace 216, and the sterilization chamber 219.

The liquid reservoir 214 opens the valve (V1) 211 to allow sterilant to flow from the concentrating furnace 208, and opens the valve (V3) 212 to remove unnecessary air sucked from the cartridge 205 and / or This is a device that removes unnecessary air, which flows into the concentration furnace 208 from the intake HEPA filter 210 and flows into the liquid reservoir 214 from the concentration furnace 208 by the liquid reservoir 214.
The liquid reservoir 214 is an application example of the reservoir for storing a liquid sterilant according to the present invention.

  The valve (V2) 215 is a valve provided in a conduit between the liquid reservoir 214 and the vaporization furnace 216, and is opened by a conduit between the liquid reservoir 214 and the vaporization furnace 216 by opening the valve. It is a valve that makes it impossible to conduct by a conduit between the liquid reservoir 214 and the vaporizing furnace 216 by closing the valve.

  The vaporizing furnace 216 is electrically connected by a conduit between the liquid reservoir 214, the intake HEPA filter 210, and the sterilization chamber 219. The vaporizing furnace 216 is an application example of the vaporizing chamber of the present invention.

The vaporizing furnace 216 is a device that vaporizes the sterilant by being depressurized by the pneumatic vacuum pump 220.

  The valve (V5) 217 is a valve provided in a conduit between the vaporizing furnace 216 and the sterilization chamber 219. By opening the valve, conduction by the conduit between the vaporizing furnace 216 and the sterilization chamber 219 is possible. And the valve is closed to disable conduction by a conduit between the vaporizing furnace 216 and the sterilization chamber 219.

  The path to the liquid reservoir 214 (also simply referred to as a reservoir), the valve (V2) 215, the vaporization chamber 216, the valve (V5), and the sterilization chamber 219 has a liquid sterilant stored in the reservoir in the sterilization chamber. This is an application example of the first route to be introduced.

  Further, the path to the liquid reservoir 214, the valve 212, the catalyst 213, and the sterilization chamber 219 is configured to suck out the gas in the reservoir into the sterilization chamber before the liquid sterilant stored in the reservoir is put into the sterilization chamber. This is an application example of two routes.

  Therefore, the introduction valve provided in the first path of the present invention is either or both of the valve (V2) 215 and the valve (V5) 217. Since the vaporizing chamber is not an essential component of the present invention, when there is no vaporizing chamber, the introduction valve is one of the valve (V2) 215 and the valve (V5) 217.

  The valve (V9) 227 is a valve provided in a conduit between the vaporizer 216 and the intake HEPA filter 210, and is opened by the conduit between the vaporizer 216 and the intake HEPA filter 210. This is a valve that enables conduction and closes the valve to disable conduction by a conduit between the vaporizing furnace 216 and the intake HEPA filter 210. That is, the valve (V9) 227 is a valve that can open and close the conduction between the vaporizing furnace 216 and the outside air (atmosphere).

  The valve (V7) 226 is a valve provided in a conduit between the sterilization chamber 219 and the intake HEPA filter 210. By opening the valve, the valve (V7) 226 is formed by a conduit between the sterilization chamber 219 and the intake HEPA filter 210. It is a valve that enables conduction and closes the valve to disable conduction by a conduit between the sterilization chamber 219 and the intake HEPA filter 210. That is, the valve (V7) 226 is a valve that can open and close the connection between the sterilization chamber 219 and the outside air (atmosphere).

  The sterilization chamber (also referred to as a vacuum chamber) 219 is a casing having a predetermined capacity for sterilizing an object to be sterilized such as a medical instrument as described with reference to FIG. The pressure in the sterilization chamber can be maintained from atmospheric pressure to vacuum pressure. Further, the temperature in the sterilization chamber is maintained within a predetermined range during the sterilization process. Further, a pressure sensor is provided in the sterilization chamber 219, and the pressure (atmospheric pressure) in the sterilization chamber 219 can be measured by the pressure sensor. The sterilization apparatus 100 determines whether the pressure (atmospheric pressure) in the sterilization chamber 219 or the like is a predetermined atmospheric pressure using the atmospheric pressure in the sterilization chamber 219 measured by the pressure sensor.

  The pneumatic vacuum pump 220 includes a sterilization chamber 219, a vaporization furnace 216, a liquid reservoir 214, a conduit between the liquid reservoir 214 and the vaporization furnace 216, and a conduit between the vaporization furnace 216 and the sterilization chamber 219. Inside, the gas in the space in the conduit between the liquid reservoir 214 and the sterilization chamber 219 is sucked, and each space is depressurized to be in a vacuum state (a state in a space filled with a gas having a pressure lower than the atmospheric pressure) ).

  The pneumatic vacuum pump 220 is connected to the sterilization chamber 219 by a conduit, and is connected to the exhaust HEPA filter 221 by a conduit.

  The exhaust HEPA filter 221 is electrically connected to the pneumatic vacuum pump 220 by a conduit. The exhaust HEPA filter 221 is electrically connected to the exhaust evaporation furnace 224 by a conduit. Further, the exhaust HEPA filter 221 is electrically connected to the sterilizing agent decomposing apparatus 222 by a conduit. Further, the exhaust HEPA filter 221 is connected to the concentration furnace 208 by a conduit.

  The exhaust HEPA filter 221 is configured such that the gas sucked from the inside of the sterilization chamber 219 or the like by the air feed vacuum pump 220 is dust, dust, germs, etc. in the gas sent from the conduit between the air feed vacuum pump 220 and the like. Is filtered with a HEPA (High Efficiency Particulate Air Filter) filter to clean the aspirated gas. The cleaned gas passes through a conduit between the sterilant decomposer 222 and the exhaust HEPA filter 221, and is sent to the sterilizer decomposer 222. The sterilant decomposer 222 removes the sterilant contained in the gas. The molecules are decomposed, and the decomposed molecules are released out of the sterilizer 100.

  Further, the exhaust HEPA filter 221 cleans the gas exhausted from the concentration furnace 208 through a conduit between the concentration furnace 208 and the exhaust HEPA filter 221. This gas is water that has been vaporized by heating the sterilant in the concentrating furnace 208, but contains a small amount of sterilant. Therefore, this gas passes through a conduit between the sterilant decomposer 222 and the exhaust HEPA filter 221. To the sterilizing agent decomposing apparatus 222. Then, the sterilizing agent decomposition apparatus 222 decomposes the molecules of the sterilizing agent contained in the gas, and releases the decomposed molecules out of the sterilizing apparatus 100.

  Further, the exhaust HEPA filter 221 cleans the vaporized sterilizing agent sent from the exhaust evaporation furnace 224 through the conduit between the exhaust evaporation furnace 224 and the exhaust HEPA filter 221. Then, the cleaned sterilizing agent (gas) passes through a conduit between the sterilizing agent decomposing apparatus 222 and the exhaust HEPA filter 221 and is sent to the sterilizing agent decomposing apparatus 222, and the sterilizing agent decomposing apparatus 222 converts the gas into the gas. The molecule | numerator of the sterilizing agent contained is decomposed | disassembled and the molecule | numerator after decomposition | disassembly is discharge | released out of the sterilizer 100. FIG.

  The exhaust HEPA filter 221 purifies the gas sent through the conduit, thereby making it difficult for dust and dirt to accumulate in the sterilizing agent decomposing apparatus 222 and extending the product life of the sterilizing agent decomposing apparatus 222.

  The sterilizing agent decomposing apparatus 222 is connected by a conduit between the exhaust HEPA filter 221. The sterilizing agent decomposing apparatus 222 decomposes the molecules of the sterilizing agent contained in the gas sent from the conduit between the sterilizing agent decomposing apparatus 222 and the exhaust HEPA filter 221 and sterilizes the molecules generated by the decomposition. Release out of device 100.

  The sterilizing agent decomposing apparatus 222 is an apparatus that decomposes the sterilizing agent. For example, when the sterilizing agent is hydrogen peroxide or a hydrogen peroxide solution, vaporized hydrogen peroxide is used as a catalyst using manganese dioxide. It is a device that can be decomposed into water and oxygen.

  The liquid feed rotary pump 223 is electrically connected to the exhaust evaporation furnace 224 via a conduit, and is electrically connected to the liquid sensor 204 via a conduit.

  The liquid feed rotary pump 223 sucks all the liquid sterilizing agent in the cartridge 205 by the pump, and sends all the sterilizing agent sent through the conduit between the liquid sensor 204 and the liquid feed rotary pump 223 to the liquid feed. This is a device for sending to the exhaust evaporation furnace 224 through a conduit between the rotary pump 223 and the exhaust evaporation furnace 224.

  The exhaust evaporation furnace 224 is electrically connected to the liquid feed rotary pump 223 by a conduit, and is electrically connected to the exhaust HEPA filter 221 by an conduit.

The exhaust evaporation furnace 224 heats all the liquid sterilizing agents in the cartridge 205 sent through a conduit between the liquid feed rotary pump 223 and the exhaust evaporation furnace 224 by a heater provided in the exhaust evaporation furnace 224. Vaporize all of the sterilant. The vaporized sterilizing agent is sent to the exhaust HEPA filter 221 through a conduit between the exhaust HEPA filter 221 and the exhaust evaporation furnace 224.
<Description of FIG. 4>

  Next, an example of each step of the sterilization process by the sterilizer according to the present invention will be described with reference to FIG.

  Each step (process) shown in FIG. 4 is performed by controlling the operation of each device in the sterilization apparatus by the control unit 201 of the sterilization apparatus 100.

  That is, by executing a program that can be read and executed by the control unit 201 of the sterilization apparatus 100, the operation of each apparatus is controlled and each process (process) shown in the drawing is executed.

  FIG. 4 is a diagram showing an example of each step of sterilization processing by the sterilization apparatus according to the present invention.

  When the sterilizer 100 is turned on, first, the RF-ID reader / writer 206 (reading / writing unit) receives data from the RF-ID (storage medium) provided on the lower side of the cartridge 205. Read (step S101).

  The RF-ID reader / writer 206 is an application example of the reading means of the present invention.

  In step S101, the data read from the RF-ID (storage medium) includes a serial number as information for identifying the cartridge, the date of manufacture of the cartridge, and the date and time when the cartridge was first used in the sterilizer. (First use date and time) and the remaining amount of sterilant filled in the cartridge. That is, the RF-ID (storage medium) provided in the cartridge 205 stores in advance the serial number, the date of manufacture, the first use date (first use date information), and the remaining amount of the sterilant. The first use date (date and time when the cartridge was first used in the sterilizer) is not stored in the RF-ID of the cartridge used for the first time in the sterilizer. Therefore, the serial number, the date of manufacture, and the remaining amount of the sterilizing agent are stored in the RF-ID of the cartridge that is used for the first time. The number, date of manufacture, date of first use, and remaining amount of sterilant are stored. Therefore, in step S101, the serial number, the date of manufacture, and the remaining amount of the sterilant are read from the RF-ID of the cartridge that is used for the first time. In addition, the serial number, date of manufacture, date of first use, and remaining amount of sterilant are read from the RF-ID of the cartridge used for the second time and thereafter.

  Therefore, in step S102, even if the first use date and time cannot be read from the RF-ID of the cartridge used for the first time, if the serial number, the date of manufacture, and the remaining amount of the sterilizing agent can be read, the RF-ID It is determined that the data has been read.

  Next, when it is determined in step S101 that data has been read from the RF-ID (step S102: YES), the sterilizer 100 determines that a cartridge is installed at the cartridge mounting location in the sterilizer 100. Then, the cartridge mounting door 101 is locked (locked) (step S103). That is, the cartridge is locked (locked) so that the cartridge cannot be taken out. In this way, when the data can be read by the reading means, the cartridge 205 is locked so that it cannot be taken out.

  Further, for example, the cartridge can be prevented from being taken out by not removing the injection needle inserted into the cartridge.

  That is, by inserting the injection needle into the cartridge in step S103, the sterilizing agent in the cartridge can be extracted and the cartridge cannot be taken out.

  As described above, when the cartridge is attached to the attachment place of the cartridge in the sterilizer 100, the cartridge is locked (locked) so that the cartridge cannot be taken out.

  When a cartridge containing a surplus of sterilizing agent is installed at the cartridge mounting location in the sterilizing apparatus 100, the cartridge is locked (locked) so that the cartridge cannot be removed. It will be possible to avoid touching.

  As described above, the sterilizer 100 locks the cartridge so that it cannot be removed when the cartridge is attached to the sterilizer. This is an application example of the locking means of the present invention.

  Then, the sterilizer 100 determines whether or not there is a predetermined amount (for example, 8 milliliters) of sterilizing agent for one sterilization in the cartridge. Specifically, it is determined whether or not the remaining amount of the sterilizing agent acquired from the RF-ID is larger than a predetermined amount for one sterilization. That is, when it is determined that the remaining amount of the sterilizing agent is larger than the predetermined amount for one sterilization, there is a predetermined amount of the sterilizing agent for one sterilization in the cartridge (a sufficient sterilization process can be performed). (Step S104: YES), the process of step S105 is performed. On the other hand, if it is determined that the remaining amount of the sterilizing agent is less than a predetermined amount (for example, 8 ml) for one sterilization, there is no predetermined amount of the sterilizing agent for one sterilization in the cartridge (sufficient sterilization). It is determined that the process cannot be executed (step S104: NO), and the process of step S112 is performed.

  In step S105, the sterilizer 100 determines whether a predetermined period (for example, 13 months) has elapsed from the date of manufacture of the cartridge acquired from the RF-ID.

  If it is determined that a predetermined period has elapsed since the date of manufacture (step S105: YES), it is determined that sufficient sterilization processing cannot be performed, and the process of step S112 is performed. On the other hand, when it is determined that the predetermined period has not elapsed since the date of manufacture (step S105: NO), it is determined that sufficient sterilization processing can be performed, and the process of step S106 is performed.

  In step S106, the sterilizer 100 determines whether a predetermined period (for example, two weeks) has elapsed from the initial use date and time acquired from the RF-ID (step S106).

  Therefore, for example, in step S101, since the first use date and time is not read from the RF-ID of the cartridge that is used for the first time, in step S106, from the first use date and time acquired from the RF-ID, a predetermined period (for example, It is determined that two weeks have not passed (step S106: NO).

  If it is determined that a predetermined period (for example, two weeks) has elapsed from the first use date and time acquired from the RF-ID (step S106: YES), it is determined that sufficient sterilization processing cannot be performed. Then, the process of step S112 is performed. On the other hand, when it is determined that a predetermined period (for example, two weeks) has not elapsed (step S106: NO), it is determined that sufficient sterilization processing can be performed, and the process of step S107 is performed.

  The sterilizer 100 displays a sterilization start screen (301 in FIG. 3) on the display unit 102 in step S107.

  FIG. 3 is a diagram illustrating an example of a screen displayed on the display unit 102 of the sterilization apparatus 100.

  On the sterilization start screen 301, a “sterilization start button” is displayed. The “sterilization start button” 302 in the sterilization start screen 301 displayed in step S107 can be pressed (activated) by the user.

  Then, when the “sterilization start button” 302 is pressed by the user (step S108: YES), the sterilization apparatus 100 displays a sterilization mode selection screen (303 in FIG. 3) on the display unit 102.

  The sterilization mode selection screen 303 displays a “mode for concentrating and sterilizing sterilizing agents” button 304 and a “mode for sterilizing without concentrating sterilizing agents” button 305.

  The sterilizer 100 accepts selection of either the “mode for sterilizing and sterilizing the sterilizing agent” button 304 or the “mode for sterilizing without concentrating the sterilizing agent” button 305 from the user (step S110). The sterilization process (step S111) according to the mode of the selected button is performed. Details of the sterilization process (step S111) will be described later with reference to FIG.

  Thus, it becomes possible to switch and use the sterilization processing mode with one sterilization apparatus in accordance with a user instruction. That is, when the “concentrate sterilant and sterilize” button 304 is pressed by the user, the sterilant is concentrated and sterilized, and the “mode sterilize without concentrating sterilant” button 305 is displayed. If pressed, sterilization is performed without concentrating the sterilant.

  Then, when the sterilization process (step S111) ends, the sterilization apparatus 100 returns the process to step S101.

  The sterilizer 100 displays a sterilization start screen (301 in FIG. 3) on the display unit 102 in step S112. However, the “sterilization start button” 302 in the sterilization start screen (301 in FIG. 3) displayed in step S112 is displayed so as not to be pressed by the user (the “sterilization start button” 302 is not active). . Therefore, it is possible to prevent the user from receiving an instruction to start the sterilization process.

  Then, the sterilizer 100 determines from the serial number acquired from the RF-ID in step S101 whether or not the cartridge installed at the cartridge mounting location has already been subjected to the sterilizing agent discharge processing ( Step S113). Specifically, the memory (storage unit) in the sterilization apparatus 100 stores a serial number for identifying a cartridge that has already been subjected to the sterilizing agent discharge process, and the serial number acquired from the RF-ID in step S101 is stored in the memory (storage unit). By determining whether or not the serial number stored in the memory (storage unit) matches, the cartridge currently attached to the sterilization apparatus 100 is a cartridge that has already been subjected to the sterilizing agent discharge process. It is determined whether or not.

  Another example of determining whether or not the cartridge has been subjected to the sterilizing agent discharge process will be described here.

  When the sterilizing apparatus 100 performs the sterilizing agent discharging process in step S114, the sterilizing apparatus 100 records information indicating that the sterilizing agent has already been discharged in the RF-ID of the cartridge 205.

  Further, in step S113, the sterilizer 100 determines whether or not the information indicating that the cartridge has already been subjected to the sterilizing agent discharge process can be read in step S101, and determines that the information can be read. If it is determined (S113: YES), the process proceeds to step S115. If it is determined that the information cannot be read (S113: NO), the process proceeds to step S114.

  In this way, it is also possible to determine whether the cartridge currently attached to the sterilization apparatus 100 is a cartridge that has already been subjected to the sterilizing agent discharge process.

  If it is determined that the cartridge currently attached to the sterilization apparatus 100 has already been subjected to the sterilizing agent discharge process (step S113: YES), the process of step S115 is performed. On the other hand, when it is determined that the cartridge has not been subjected to the sterilizing agent discharge process (step S113: NO), the entire remaining amount of the liquid sterilizing agent remaining in the cartridge is sucked and all the sterilizing agents are removed. A sterilizing agent discharge process (step S114) that is decomposed and released to the outside of the sterilizer 100 is performed, and then the process of step S115 is performed. Details of the sterilant discharge process in step S114 will be described later with reference to FIG.

  Step S114 is an application example of a discarding unit that discards the aqueous hydrogen peroxide solution in the cartridge. That is, the discarding unit discards all the hydrogen peroxide solutions in the cartridge by decomposing using the catalyst.

  When it is determined in step S104, step S105, or step S106 that the data read in step S101 satisfies a predetermined condition, the discarding unit discards the sterilizing agent in the cartridge 205.

  That is, here, the predetermined condition is a condition as to whether the amount of the sterilizing agent used in one sterilization process remains in the cartridge, a condition as to whether a predetermined time has elapsed from the date of manufacture of the cartridge, the cartridge It is a condition including the condition whether the predetermined time has passed since the first use date.

  When the process of step S114 is performed, the serial number read in step S101 is stored in the memory (storage unit) in the sterilization apparatus 100 as the serial number for identifying the cartridge that has already been subjected to the sterilant discharge process (discard process). .

  In step 115, the sterilizer 100 unlocks the cartridge mounting door 101.

  Step S115 is an application example of the release means for releasing the lock by the lock means.

  For example, the lock can be released by removing the injection needle inserted in the cartridge from the cartridge.

  In this way, before the lock is released, all the sterilant in the cartridge 205 is sucked out and discarded (S114), so that the user can be prevented from touching the sterilant and safety is improved. To do.

  If it is determined in step S102 that data could not be read from the RF-ID in step S101 (step S102: NO), the sterilizer 100 has a cartridge installed at the cartridge mounting location in the sterilizer 100. It is determined that there is no cartridge attachment request screen 1101 shown in FIG. 11 (step S116).

  FIG. 11 is a diagram illustrating an example of a cartridge attachment request screen 1101 displayed on the display unit 102 of the sterilization apparatus 100.

  An “OK” button 1102 is displayed on the cartridge attachment request screen 1101.

  Then, the sterilizer 100 determines whether the “OK” button 1102 on the cartridge attachment request screen 1101 has been pressed by the user (step S117). If the “OK” button 1102 is pressed (YES), the cartridge mounting request screen 1101 is displayed. The door 101 is unlocked (step S118), and the process returns to step S101. On the other hand, when the “OK” button 1102 is not pressed (NO), the cartridge attachment request screen 1101 is continuously displayed.

The unlocking and locking of the cartridge mounting door 101 is performed by an operation by the lock operation control unit 202.
<Description of FIG. 5>

  Next, an example of detailed processing of the sterilization processing shown in S111 of FIG. 4 will be described using FIG.

  FIG. 5 is a diagram showing an example of detailed processing of the sterilization processing shown in S111 of FIG.

  Each step (process) shown in FIG. 5 is performed by controlling the operation of each device in the sterilization apparatus by the control unit 201 of the sterilization apparatus 100.

  That is, by executing a program that can be read and executed by the control unit 201 of the sterilization apparatus 100, the operation of each apparatus is controlled and each process (process) shown in the drawing is executed.

  When starting the process shown in step S501 shown in FIG. 5, all the valves (valve (V1) 211, valve (V2) 215, valve (V3) 212, valve (V9) 227, valve (V7) of the sterilizer 100 are used. ) 226) is a closed state.

  First, in step S501, the sterilizer 100 operates the pneumatic vacuum pump 220 to suck the gas in the sterilization chamber 219 and reduce the pressure until the atmospheric pressure in the sterilization chamber 219 reaches a predetermined pressure (for example, 45 Pascals). Perform pre-sterilization process. Detailed processing of the pre-sterilization process will be described later with reference to FIG.

  In step S502, the sterilization apparatus 100 performs a sterilization process of sterilizing an object to be sterilized by putting a sterilizing agent in the sterilization chamber 219. Detailed processing of the sterilization process will be described later with reference to FIG.

Next, in step S503, the sterilizer 100 performs a ventilation process for removing the sterilant contained in the sterilization chamber 219 and the vaporizing furnace 216. Detailed processing of the ventilation process will be described later with reference to FIG.
<Description of FIG. 6>

  Next, an example of detailed processing of the pre-sterilization process shown in S501 of FIG. 5 will be described using FIG.

  FIG. 6 is a diagram showing an example of detailed processing of the pre-sterilization process shown in S501 of FIG.

  Each process (process) shown in FIG. 6 is performed by controlling the operation of each apparatus in the sterilization apparatus by the control unit 201 of the sterilization apparatus 100.

  That is, by executing a program that can be read and executed by the control unit 201 of the sterilization apparatus 100, the operation of each apparatus is controlled and each process (process) shown in the drawing is executed.

  First, the sterilizer 100 operates the pneumatic vacuum pump 220 to start a process of sucking the gas in the sterilization chamber 219 (step S601).

  In step S602, the sterilizer 100 determines whether the pressure (atmospheric pressure) in the sterilization chamber 219 has been reduced to a predetermined atmospheric pressure (for example, 45 Pascals). Specifically, it is determined whether the pressure (atmospheric pressure) in the sterilization chamber 219 measured by a pressure sensor provided in the sterilization chamber 219 is reduced to a predetermined atmospheric pressure (for example, 45 Pascals).

  In step S602, when it is determined that the pressure (atmospheric pressure) in the sterilization chamber 219 is not reduced to a predetermined atmospheric pressure (for example, 45 Pascal) (NO), the pneumatic vacuum pump 220 is continuously operated to sterilize. The gas in the chamber 219 is sucked and the pressure (atmospheric pressure) in the sterilization chamber 219 is reduced.

On the other hand, if it is determined in step S602 that the pressure (atmospheric pressure) in the sterilization chamber 219 has been reduced to a predetermined atmospheric pressure (for example, 45 Pascals) (YES), the pneumatic vacuum pump 220 is continuously operated. Then, the gas in the sterilization chamber 219 is sucked, and the process of step S502 is started.
<Explanation of FIG. 7>

  Next, an example of detailed processing of the sterilization process shown in S502 of FIG. 5 will be described using FIG.

  FIG. 7 is a diagram showing an example of detailed processing of the sterilization process shown in S502 of FIG.

  Each process (process) shown in FIG. 7 is performed by controlling the operation of each apparatus in the sterilization apparatus by the control unit 201 of the sterilization apparatus 100.

  That is, by executing a program that can be read and executed by the control unit 201 of the sterilization apparatus 100, the operation of each apparatus is controlled and each process (process) shown in the drawing is executed.

First, the sterilizer 100 opens the valve (V5) 217, and conducts the conduit between the sterilization chamber 219 and the vaporizing furnace 216 (step S701). Thereby, since the gas in the sterilization chamber 219 is currently sucked and depressurized by the pneumatic vacuum pump 220, depressurization in the sterilization chamber 219 and in the vaporizing furnace 216 is started (step S702).

  Then, in step S110, the sterilizer 100 determines which one of the “mode for sterilizing and sterilizing the sterilant” button 304 and the “mode for sterilizing without sterilizing agent” button 305 is pressed (step S110). S703). If it is determined that the “mode for sterilizing and sterilizing” button 304 is pressed (YES), the process of step S704 is performed, and the “mode for sterilizing without concentrating sterilizing agent” button 305 is pressed. If it is determined (NO), the process of step S728 is performed.

  Here, first, a case where the “mode for sterilizing and sterilizing sterilizing agent” button 304 is pressed (when sterilizing agent is concentrated and sterilized) will be described.

  In step S704, the sterilizer 100 operates the liquid feed rotary pump 207 to suck a predetermined amount (for example, 2 milliliters) of the sterilizing agent in the cartridge 205. Then, the sucked predetermined amount of sterilizing agent is put into the concentration furnace 208. The predetermined amount of sterilizing agent sucked out here is an amount that can saturate the space in the sterilization chamber 219 with the sterilizing agent, for example.

  In step S705, the sterilizer 100 writes the remaining amount of the sterilizing agent remaining in the cartridge 205 in the RF-ID of the cartridge 205 attached to the cartridge attachment location. Specifically, a value obtained by subtracting a predetermined amount (for example, 2 milliliters) sucked from the cartridge 205 in step S704 from the remaining amount of the sterilant in the cartridge 205 read in step S101 is stored in the RF-ID.

  That is, a value obtained by subtracting the total amount of sterilizing agent sucked from the cartridge 205 in step S704 from the remaining amount of sterilizing agent in the cartridge 205 read in step S101 is stored in the RF-ID in step S705.

  In addition, the sterilization apparatus 100 determines that the cartridge is not used this time when the first use date and time (date and time when the cartridge is first used in the sterilization apparatus) read from the RF-ID in step S101 does not include information indicating the date and time. Judged to be used for the first time in a sterilizer. That is, if the first use date / time cannot be read from the RF-ID in step S101, the sterilizer 100 determines that the cartridge has been used for the first time in the sterilizer.

  Thus, only when it is determined that the cartridge is used for the first time in the sterilizer, the current date and time information is also written in the RF-ID.

  Next, since the sterilizer 100 heats the heater provided in the concentration furnace 208 whenever the sterilization apparatus 100 is powered on, the sterilant placed in the concentration furnace 208 in step S704 is Heated by the heat of the heater, the moisture contained in the sterilant in the concentration furnace 208 is evaporated (step S706).

  The reason why the heater provided in the concentration furnace 208 is always heated when the sterilizer 100 is turned on is, for example, in order to be able to use the sterilizer immediately at any time in an operating room. is there. Thus, by eliminating the time required to heat the heater of the concentration furnace, the sterilizer can be used immediately anytime.

  That is, when the sterilizing agent is a hydrogen peroxide solution (also referred to as an aqueous hydrogen peroxide solution), the heater provided in the concentration furnace 208 is specifically heated here at, for example, 80 degrees. Thereby, water can be mainly evaporated (vaporized), and the sterilizing agent can be concentrated.

  Next, in step S707, the sterilizer 100 determines whether or not a predetermined time (for example, 6 minutes) has elapsed since the sterilant was added to the concentration furnace 208 in step S704. If it is determined that a predetermined time has elapsed since the sterilizing agent was put into the concentration furnace 208 (YES), the process of step S708 is performed. On the other hand, if a predetermined time has not elapsed since the sterilizing agent was put into the concentrating furnace 208 (NO), the sterilizing agent is continuously put in the concentrating furnace 208 and the sterilizing agent is subsequently concentrated.

  Next, in step S708, the sterilizer 100 determines whether the atmospheric pressure in the sterilization chamber 219 and the vaporization furnace 216 has been reduced to a predetermined atmospheric pressure (for example, 500 Pascals).

  When the atmospheric pressure in the sterilization chamber 219 and the vaporization furnace 216 is reduced to a predetermined atmospheric pressure (YES), the sterilizer 100 opens the valve (V3) 212 for a predetermined time in step S709 (valve ( V3) 212 is opened for a predetermined time (for example, 3 seconds) and valve (V3) 2123 is closed), so that the pressure in the liquid reservoir 214 is reduced. On the other hand, when the pressure in the sterilization chamber 219 and the vaporization furnace 216 is not reduced to a predetermined pressure (NO), the sterilant is continuously concentrated.

  Next, in step S710, the sterilizer 100 opens the valve (V3) 212 for a predetermined time and closes the valve (V3) 212 in step S709, and then closes the valve (V1) for a predetermined time (for example, 3 seconds). When opened, since the atmospheric pressure in the liquid reservoir 214 is lower than the atmospheric pressure in the concentration furnace 208 (external), the sterilant contained in the concentration furnace 208 is sucked into the liquid reservoir 214 (step S710). Here, by opening and closing the valve (V1) for a predetermined time, the sterilant contained in the concentration furnace 208 is sucked into the liquid reservoir 214. Here, not only the sterilizing agent but also the air in the concentration furnace 208 is sucked into the liquid reservoir 214 together.

  After that, the inside of the sterilization chamber 219 is continuously depressurized by the pneumatic vacuum pump 220.

  Therefore, the atmospheric pressure in the sterilization chamber 219 is lower than the atmospheric pressure in the liquid reservoir. Specifically, the atmospheric pressure in the sterilization chamber 219 is about 400 Pa, and the atmospheric pressure in the liquid reservoir is a value of atmospheric pressure (101325 Pa). The reason why the pressure in the liquid reservoir rises to near atmospheric pressure is that not only the sterilizing agent but also the air in the concentration furnace 208 is sucked into the liquid reservoir 214 together.

  Next, in step S711, the sterilizer 100 opens the valve (V3) 212 for a predetermined time (for example, 3 seconds), and sucks out air (not including liquid sterilant) into the sterilization chamber 219. It is. That is, here, when the predetermined time has elapsed after opening the valve (V3) 212, the valve (V3) 212 is closed.

  Next, the sterilizer 100 determines whether the atmospheric pressure in the sterilization chamber 219 and the vaporizing furnace 216 is reduced to a predetermined atmospheric pressure (for example, 80 Pa). In step S712, the valve (V5) 217 is closed (step S713).

  Then, the sterilizer 100 opens the valve (V2) 215 (step S714). Thereby, the sterilizing agent in the liquid reservoir 214 is sucked into the vaporizing furnace 216 and vaporized in the vaporizing furnace 216.

  Here, the sterilizing agent is vaporized in the vaporizer as a molecular cluster.

  The inside of the sterilization chamber has a volume larger than that of the vaporizing furnace, and in the vaporizing furnace, the sterilizing agent is vaporized as a molecular cluster. This is because the volume of the vaporizing furnace is smaller than that in the sterilization chamber, and the distance between the molecules of the sterilant in the sterilization chamber is so close that molecular clusters are easily formed due to intermolecular forces.

  Also at this time, the pneumatic vacuum pump 220 continues to suck the gas in the sterilization chamber 219 and depressurize the interior of the sterilization chamber 219. The atmospheric pressure rises in the vaporizing furnace 216 into which the sterilizing agent in the liquid reservoir 214 has been sucked.

  That is, the atmospheric pressure in the vaporizing furnace 216 is higher than the atmospheric pressure in the sterilization chamber 219.

  Next, the sterilizer 100 determines whether the atmospheric pressure in the sterilization chamber 219 has been reduced to a predetermined atmospheric pressure (for example, 50 Pa) and a predetermined time has elapsed since the valve (V2) 215 was opened in step S714. (Step S715), and when the atmospheric pressure in the sterilization chamber 219 is reduced to a predetermined atmospheric pressure (for example, 50 Pa) and a predetermined time has elapsed since the valve (V2) 215 was opened in Step S714 (YES) Then, the suction (evacuation) in the sterilization chamber 219 by the pneumatic vacuum pump 220 is stopped (step S716), and the valve (V5) 217 is opened (step S717). As a result, the vaporized sterilizing agent diffuses into the sterilization chamber 219, and the object to be sterilized can be sterilized.

  This diffuses because the atmospheric pressure (eg, 50 Pa) in the sterilization chamber 219 is lower than the atmospheric pressure in the vaporization furnace 216.

  Here, the sterilizing agent that diffuses further subdivides the molecular clusters in the vaporization furnace, so that the sterilizing agent can be further diffused into the sterilization chamber, and the sterilization effect can be enhanced.

  In addition, it becomes possible to effectively sterilize a fine lumen of an object to be sterilized.

  Then, it is determined whether or not a predetermined time (for example, 330 seconds) has elapsed since the valve (V5) 217 was opened in step S717, and the predetermined time (for example, 330 seconds) has elapsed since the valve (V5) 217 was opened. If it is determined that the time has elapsed (step S718: YES), the valve (V9) 227 is opened (step S719).

  Thereby, since the atmospheric pressure in the vaporizing furnace 216 and the sterilization chamber 219 is lower than the atmospheric pressure outside the sterilizing apparatus 100, the outside air (air) outside the sterilizing apparatus 100 that has been cleaned with the intake HEPA filter is removed. And is sucked into the vaporizing furnace 216. Then, the sterilizing agent filled in the vaporizing furnace 216 as a gas and the sterilizing agent adhering to the inner surface of the vaporizing furnace 216 are sent into the sterilization chamber 219 by the air sent into the vaporizing furnace 216. The sterilization effect on the object to be sterilized in the sterilization chamber 219 is enhanced. That is, for example, this enhances the sterilization effect on a portion that is difficult to sterilize, such as the back of a thin tube to be sterilized.

  In step S719, the sterilizer 100 opens the valve (V7) 226 after a predetermined time (15 seconds) has elapsed since opening the valve (V9) 227, and is further cleaned by the intake HEPA filter 210. Further, outside air (air) outside the sterilization apparatus 100 is sucked into the sterilization chamber 219. This is because the atmospheric pressure inside the sterilization chamber 219 and the vaporizing furnace 216 is lower than the atmospheric pressure outside the sterilization apparatus 100, so the outside air (air) outside the sterilization apparatus 100 is sucked into the sterilization chamber 219.

  This enhances the sterilization effect on a portion that is difficult to sterilize (particularly the lumen portion) such as the back of a thin tube to be sterilized.

  Next, the sterilizer 100 determines whether the inside of the sterilization chamber 219 and the inside of the vaporizing furnace 216 have increased to atmospheric pressure, and when it is determined that the pressure has increased to atmospheric pressure (step S721: YES), the valve (V2) 215 is closed (step S722).

  Next, the sterilizer 100 closes the valve (V7) 226 (step S723), and resumes the suction (evacuation) in the sterilization chamber 219 by the pneumatic vacuum pump 220 (step S724). Thereby, the outside air (air) outside the sterilization apparatus 100 cleaned by the intake HEPA filter 210 is sucked into the vaporization furnace 216 through a conduit in which the intake HEPA filter 210 and the vaporization furnace 216 are conducted. . The sterilizing agent filled as a gas in the vaporizing furnace 216 and the sterilizing agent adhering to the inner surface of the vaporizing furnace 216 are further transferred into the sterilization chamber 219 by the air sent into the vaporizing furnace 216. It is sent.

  As a result, the sterilization effect on a portion that is difficult to sterilize (particularly the lumen portion) such as the back of a thin tube to be sterilized is enhanced, and the sterilizing agent in the vaporizing furnace 216 can be effectively reduced. .

  In step S724, the sterilizer 100 closes the valve (V9) 227 after a predetermined time (for example, 15 seconds) after resuming suction (evacuation) in the sterilization chamber 219 by the pneumatic vacuum pump 220. (Step S725).

  At this time, suction (evacuation) in the sterilization chamber 219 is continuously performed by the pneumatic vacuum pump 220. In step S725, the sterilization chamber 219 and the vaporization furnace 216 are sealed, and the sterilization chamber 219 and The inside of the vaporizing furnace 216 is depressurized (step S726).

  Next, the sterilizer 100 determines whether or not the process from step S702 to step S726 has been executed a predetermined number of times (for example, 4 times) (step S727). If it is determined that the process has been executed (YES), the process proceeds to step S503. Process. On the other hand, if it is determined that the processing from step S702 to step S726 has not been executed a predetermined number of times, the processing after step S702 is performed again. As described above, by performing the processing from step S702 to step S726 a predetermined number of times, the effect of the sterilization effect on the object to be sterilized is increased, and the object to be sterilized can be sufficiently sterilized.

  Next, a case where it is determined in step S703 that the “mode for sterilization without concentrating sterilant” button 305 is pressed (when sterilization is performed without concentrating the sterilant) will be described.

  When it is determined in step S703 that the “mode for sterilization without concentrating sterilizing agent” button 305 is pressed (NO), the sterilizer 100 determines that the pressure in the sterilization chamber 219 and the vaporization furnace 216 is a predetermined pressure ( For example, it is determined whether the pressure has been reduced to 1000 Pa) (step S728).

  Then, when it is determined that the pressure in the sterilization chamber 219 and the vaporization furnace 216 has been reduced to a predetermined pressure (for example, 100 Pa) (step S728: YES), the sterilizer 100 turns the liquid feed rotary pump 207 on. Operates and sucks a predetermined amount (eg, 2 milliliters) of sterilant in the cartridge 205. Then, the sucked predetermined amount of sterilizing agent is put into the concentration furnace 208 (step S729).

The predetermined amount of sterilizing agent sucked out here is an amount that can saturate the space in the sterilization chamber 219 with the sterilizing agent, for example.

  Next, in step S730, the sterilizer 100 writes the remaining amount of the sterilizing agent remaining in the cartridge 205 in the RF-ID of the cartridge 205 attached to the cartridge attachment location. Specifically, a value obtained by subtracting a predetermined amount (for example, 2 milliliters) sucked from the cartridge 205 in step S729 from the remaining amount of the sterilant in the cartridge 205 read in step S101 is stored in the RF-ID.

  Further, the predetermined amount per one time when the sterilizing agent is sucked from the cartridge 205 is, for example, 2 milliliters, and it is determined in step S727 that the predetermined number of times is not executed (NO), and the processing after step S702 can be performed. For example, in the case of the second time, the total amount of the sterilizing agent sucked from the cartridge 205 in step S729 is (2 ml (predetermined amount) × second time =) 4 ml, so the cartridge 205 read in step S101 is stored in the cartridge 205. A value obtained by subtracting 4 milliliters, which is the total amount of the sterilizing agent sucked from the cartridge 205 in step S729, from the remaining amount of the sterilizing agent is stored in the RF-ID in step S730.

  That is, a value obtained by subtracting the total amount of the sterilant sucked from the cartridge 205 in step S729 from the remaining amount of the sterilant in the cartridge 205 read in step S101 is stored in the RF-ID in step S730.

  In addition, in step S730, the sterilizer 100 does not include information indicating the date and time in the first use date and time (date and time when the cartridge was first used in the sterilizer) read from the RF-ID in step S101. This time, it is determined that the cartridge has been used for the first time in the sterilizer. That is, if the first use date / time cannot be read from the RF-ID in step S101, the sterilizer 100 determines that the cartridge has been used for the first time in the sterilizer.

  Thus, only when it is determined that the cartridge is used for the first time in the sterilizer, the current date and time information is also written in the RF-ID.

  And if the sterilizer 100 performs the process of step S730, it will perform the process after step S709 already demonstrated.

  In step S728, when the inside of the sterilization chamber 219 reaches a predetermined atmospheric pressure (for example, 1000 Pa), the sterilizing agent starts to be sucked in step S729, and when the sterilizing agent is sucked in step S729, the pressure drops below 500 Pa. Can be transferred to.

Thus, after the pressure in the sterilization chamber 219 and in the vaporization furnace 216 is reduced to a predetermined pressure (for example, 1000 Pascals) at which pressure reduction in the liquid reservoir 214 starts, a predetermined amount of sterilization sucked out. In step S709, the liquid reservoir 214 can be immediately depressurized, and then in step S710, the sterilant in the concentration furnace 208 is placed in the liquid reservoir. It becomes possible to put a sterilant in the reservoir 214 immediately. That is, the sterilant can be put into the liquid reservoir 214 without being substantially concentrated in the concentration furnace 208.
<Description of FIG. 8>

  Next, an example of detailed processing of the ventilation process shown in S503 of FIG. 5 will be described with reference to FIG.

  FIG. 8 is a diagram showing an example of detailed processing of the ventilation process shown in S503 of FIG.

  Each step (process) shown in FIG. 8 is performed by controlling the operation of each device in the sterilization apparatus by the control unit 201 of the sterilization apparatus 100.

  That is, by executing a program that can be read and executed by the control unit 201 of the sterilization apparatus 100, the operation of each apparatus is controlled and each process (process) shown in the drawing is executed.

  First, the sterilizer 100 opens the valve V (7) 226 (step S801).

  Then, the sterilizer 100 continues the suction (evacuation) in the sterilization chamber 219 by the pneumatic vacuum pump 220 (step S802).

  After opening the valve V (7) 226 in step S801, suction (evacuation) in the sterilization chamber 219 is performed by the pneumatic vacuum pump 220 in step S802, and when a predetermined time has elapsed (step S803: YES), the valve V (7) 226 is closed (step S804), and suction (evacuation) in the sterilization chamber 219 by the pneumatic vacuum pump 220 is continued. Thereby, the inside of the sterilization chamber 219 is depressurized.

  Next, when the inside of the sterilization chamber 219 is depressurized to a predetermined atmospheric pressure (50 Pa) (step S806: YES), the sterilizer 100 opens the valve V (7) 226 (step S807). As a result, the outside air (air) outside the sterilization apparatus 100 cleaned by the intake HEPA filter 210 is sucked into the sterilization chamber 219. This is because the air pressure inside the sterilization chamber 219 is lower than the air pressure outside the sterilization device 100, so that outside air (air) outside the sterilization device 100 is sucked into the sterilization chamber 219.

  Then, the sterilizer 100 determines whether the atmospheric pressure in the sterilization chamber 219 has increased to atmospheric pressure, and if it is determined that the atmospheric pressure in the sterilization chamber 219 has increased to atmospheric pressure (step S808: YES), It is determined whether the processing from step S804 to step S808 has been performed a predetermined number of times (for example, 4 times) (step S809). If the processing from step S804 to step S808 has been performed a predetermined number of times (for example, 4 times) (YES), The valve V (7) 226 is closed (step S810), and the ventilation process ends.

  On the other hand, if the processing from step S804 to step S808 has not been performed a predetermined number of times (for example, 4 times) (NO), the processing from step S804 is performed again.

Thereby, the sterilizing agent adhering to the surface in the sterilization chamber 219 and the sterilizing agent remaining as a gas in the sterilization chamber 219 are sucked by the pneumatic vacuum pump 220. The sucked gas (including the sterilizing agent) passes through the exhaust HEPA filter 221, the sterilizing agent is decomposed by the sterilizing agent decomposing apparatus 222, and the decomposed molecules are released to the outside.
<Description of FIG. 9>

  Next, an example of detailed processing of the sterilization discharge processing shown in S114 of FIG. 4 will be described using FIG.

  FIG. 9 is a diagram showing an example of detailed processing of the sterilization discharge processing shown in S114 of FIG.

  Each step (process) shown in FIG. 9 is performed by controlling the operation of each device in the sterilization apparatus by the control unit 201 of the sterilization apparatus 100.

  That is, by executing a program that can be read and executed by the control unit 201 of the sterilization apparatus 100, the operation of each apparatus is controlled and each process (process) shown in the drawing is executed.

  First, the sterilizer 100 sucks all the liquid sterilizing agent in the cartridge 205 by the liquid feed rotary pump 223 and sends it all through the conduit between the liquid sensor 204 and the liquid feed rotary pump 223. The sterilizing agent is sent into the exhaust evaporator 224 through a conduit between the liquid feed rotary pump 223 and the exhaust evaporator 224 (step S901).

  The sterilization apparatus 100 is configured so that all the liquid sterilizing agents (sterilizing agents stored in the exhaust evaporation furnace 224) are sent by the exhaust evaporation furnace 224 through the conduit between the liquid feed rotary pump 223 and the exhaust evaporation furnace 224. Is heated by a heater provided in the exhaust evaporation furnace 224 to vaporize all of the sterilant. The vaporized sterilizing agent is sent to the exhaust HEPA filter 221 through a conduit between the exhaust HEPA filter 221 and the exhaust evaporation furnace 224 (step S902).

  Here, the heater provided in the exhaust evaporation furnace 224 is heated to a temperature higher than, for example, the boiling point of the sterilant (hydrogen peroxide) (the boiling point of hydrogen peroxide is 141 degrees). Therefore, all of the sterilizing agent is vaporized by the exhaust evaporation furnace 224.

  Then, the sterilizer 100 cleans the vaporized sterilant sent through the conduit between the exhaust evaporation furnace 224 and the exhaust HEPA filter 221 with the exhaust HEPA filter 221, (Containing the agent) passes through the conduit between the sterilant decomposer 222 and the exhaust HEPA filter 221 and is sent to the sterilizer decomposer 222.

The sterilizing agent decomposing apparatus 222 decomposes the molecules of the sterilizing agent contained in the gas sent from the conduit between the sterilizing agent decomposing apparatus 222 and the exhaust HEPA filter 221, and generates molecules generated by decomposing. Is released out of the sterilizer 100 (step S903).
<Description of FIG. 10>

FIG. 10 is a diagram illustrating an example of a cross-sectional view of a conduit provided between the valve (V3) 212 and the sterilization chamber 219.
Reference numeral 1201 denotes a conduit provided between the valve (V 3) 212 and the sterilization chamber 219.

  1202 is a catalyst (for example, manganese dioxide) for decomposing hydrogen peroxide (sterilizing component) into water and oxygen.

  Reference numeral 1203 denotes an air permeable member provided so that the catalyst 1202 does not fall into the sterilization chamber 219. This is, for example, a member made of a waterproof and moisture-permeable material. Or this member is a breathable mesh. When this member is a mesh, it is made of metal or cloth, for example.

  As shown in FIGS. 2 and 10, by providing a catalyst for decomposing the sterilizing agent in the path between the valve (V3) 212 and the sterilizing chamber 219, the concentration of the sterilizing agent entering the sterilizing chamber from the path. Can be reduced.

  In addition, when the sterilant decomposes, a large heat of reaction is generated, so the water produced by decomposition decomposes into steam. Therefore, it is difficult for water or a low-concentration aqueous hydrogen peroxide solution to enter the sterilization chamber later due to condensation, and appropriate sterilization can be performed.

  As described above, according to the present invention, the concentration of the sterilant entering the sterilization chamber from the path is provided by providing the catalyst for decomposing the sterilant in the path for sucking out the air contained in the liquid reservoir into the sterilized chamber whose pressure is reduced. Can be reduced.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to these embodiment, Various forms of the range which does not deviate from the summary of this invention are also contained in this invention. .

  For example, the function of the above embodiment may be used as a sterilization method, and this sterilization method may be executed by a sterilization apparatus. Moreover, you may make it make the computer with which the sterilizer equips the program which has the function of the above-mentioned embodiment run. The control program is recorded on a computer-readable recording medium, for example.

  The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various recording media, and the computer (or CPU, MPU, etc.) of the system or apparatus reads the program. To be executed.

100 Sterilizer

Claims (5)

A sterilizer for sterilizing an object in a sterilization chamber using a sterilant,
A reservoir for storing a liquid sterilant;
The sterilization chamber in which the target part is accommodated;
A first path for introducing the liquid sterilant stored in the reservoir into the sterilization chamber;
A second path for sucking the gas in the reservoir into the sterilization chamber before the liquid sterilant stored in the reservoir is charged into the sterilization chamber;
A catalyst provided in the second path for decomposing a sterilizing component of the sterilant;
A sterilization apparatus comprising: Vacuum equipment,
A valve provided in the second path for sucking the atmosphere contained in the reservoir in which a liquid sterilant is stored into the sterilization chamber evacuated by the vacuum device;
The sterilizer according to claim 1, further comprising:   Before introducing the liquid sterilant stored in the reservoir into the sterilization chamber, the atmosphere contained in the reservoir in which the liquid sterilant is stored is transferred to the sterilization chamber whose pressure is reduced by the vacuum device. The sterilizer according to claim 2, further comprising a control means for controlling to open the valve for sucking out. An introduction valve provided in the first path;
The control means opens and closes the valve to suck out the air contained in the reservoir into the decompressed sterilization chamber, and then opens the introduction valve to open the liquid stored in the reservoir. The sterilizing apparatus according to claim 3, wherein the sterilizing agent is introduced into the sterilization chamber. A vaporization chamber provided between the reservoir and the sterilization chamber;
The introduction valve is provided in a first path between the vaporization chamber and the reservoir,
The controller opens and closes the valve to suck out the air contained in the reservoir into the sterilized chamber that has been depressurized, and then opens the introduction valve to open the liquid stored in the reservoir. The sterilizing apparatus according to claim 4, wherein the sterilizing agent is introduced into the vaporizing chamber, the liquid sterilizing agent is vaporized, and the vaporized sterilizing agent is introduced into the sterilizing chamber.

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