JP4046287B2 - Cleaning sterilizer - Google Patents

Description

  The present invention relates to a cleaning and sterilizing apparatus for cleaning and sterilizing medical instruments and the like.

  Medical instruments such as scissors and scalpels used at medical sites need to be sufficiently washed and sterilized after use. Here, an example of a conventional cleaning and sterilizing apparatus used for cleaning and sterilizing medical instruments will be described with reference to FIG. This cleaning and sterilizing apparatus has a housing 1 for storing a medical instrument (not shown) as an object to be cleaned, and a mounting table 2 on which a basket containing the medical instrument is placed. The rotary nozzle 3 positioned above and below the mounting table 2, a heater (not shown) for heating the air in the housing 1, and the medical device on which the air heated by the heater is mounted on the mounting table 2 A fan (not shown) that blows air toward the appliance is provided.

  A tap water pipe 4 that supplies tap water, a hot water pipe 5 that supplies hot water or high-temperature steam, and a detergent pipe 6 that supplies detergent from a detergent tank (not shown) are provided on the side surface of the housing 1. And are connected. An electromagnetic valve 4 a is provided in the middle of the tap water pipe 4, an electromagnetic valve 5 a is provided in the middle of the hot water pipe 5, and a detergent supply pump 6 a is provided in the middle of the detergent pipe 6.

  On the bottom surface of the casing 1, an outflow pipe for allowing tap water, which is a cleaning liquid supplied into the casing 1, a cleaning liquid in which tap water and a detergent are mixed, hot water and the like to flow out of the casing 1. 7 is connected. This outflow pipe 7 is bifurcated at its tip, one is a water conduit 8 that guides cleaning liquid, hot water, etc. to the nozzle 3, and the other is a drain pipe 9 that drains the cleaning liquid, hot water, etc. Yes. In the middle of the outflow pipe 7, a filter 7 a that removes dust contained in the cleaning liquid and hot water flowing in the outflow pipe 7 is provided. In the middle of the water guide pipe 8, two electromagnetic valves 8 a and 8 b are circulated. A pump 8 c is provided, and an electromagnetic valve 9 a is provided in the middle of the drain pipe 9.

  The electromagnetic valves 4a, 5a, 8a, 8b, 9a, the pumps 6a, 8c, the level switch 10 for detecting that the cleaning liquid or hot water accumulated in the housing 1 has reached a predetermined amount, a heater, a fan, etc. , Connected to a control unit (not shown) using a microcomputer.

  A procedure for cleaning and sterilizing a medical instrument using such a cleaning and sterilizing apparatus will be described. First, a lid (not shown) of the housing 1 is opened, a basket containing medical instruments is placed on the mounting table 2, and the lid is closed. In this state, all the solenoid valves 4a, 5a, 8a, 8b, 9a are closed and the pumps 6a, 8c are stopped.

  When the start button is pressed after the lid of the casing 1 is closed, the electromagnetic valve 4a is opened and tap water is supplied into the casing 1, and the detergent supply pump 6a is driven so that the detergent is stored in the casing 1. And a cleaning liquid in which tap water and detergent are mixed is stored in the housing 1. When the level switch 10 detects that the cleaning liquid accumulated in the casing 1 has reached a predetermined amount, the electromagnetic valve 4a is closed based on the detection result, the detergent supply pump 6a is stopped, and the electromagnetic valve 8a. , 8b are opened, and the circulation pump 8c is driven.

  As a result, the cleaning liquid accumulated in the housing 1 flows through the outflow pipe 7 and the water guide pipe 8 and is ejected from the nozzle 3, and the medical instrument stored in the housing 1 is cleaned with the cleaning liquid. When the cleaning liquid is ejected from the nozzle 3, the nozzle 3 is rotated by the reaction force. When this cleaning is performed for a predetermined time, the solenoid valves 8a and 8b are closed, the driving of the circulation pump 8c is stopped, and the solenoid valve 9a is opened. As a result, the cleaning liquid used for cleaning the medical instrument is drained through the outflow pipe 7 and the drain pipe 9.

  In the cleaning with the cleaning liquid, when the tap water and the detergent are mixed to form the cleaning liquid, the temperature of the cleaning liquid is adjusted by supplying hot water from the hot water pipe 5 together with the tap water. In some cases, the pre-cleaning that removes proteins such as blood while preventing the coagulation of the protein with this cleaning solution and the main cleaning that mainly removes fats and oils with a cleaning solution of about 60 ° C. may be performed in two stages. In some cases, after cleaning with the cleaning liquid, only tap water is sprayed from the nozzle 3 to rinse the medical device.

  After the cleaning liquid or the rinsing water is drained and the electromagnetic valve 9 a is closed, the electromagnetic valve 5 a is opened, and hot water or high-temperature steam is supplied from the hot water pipe 5 into the housing 1. When the level switch 10 detects that the hot water supplied into the housing 1 has reached a predetermined amount, the electromagnetic valve 5a is closed to stop the supply of hot water, and the electromagnetic valves 8a, 8b is opened, and the circulation pump 8c is driven. And the hot water collected in the housing | casing 1 is injected with rotation toward the medical device accommodated in the housing | casing 1 from the nozzle 3, and sterilization of a medical device is performed.

  After the medical instrument is sterilized by hot water injection for a predetermined time, the driving of the circulation pump 8 c is stopped and the hot water is drained from the drain pipe 9. After the hot water is drained, the heater and fan are driven, and the air heated by the heater is blown by the fan toward the cleaned and sterilized medical device, and the medical device is dried to perform a series of cleaning and sterilization treatments. finish.

The microfilm of Japanese Utility Model Application No. 3-64473 (Japanese Utility Model Application Publication No. 5-15952)

  In the cleaning and sterilization apparatus shown in FIG. 3, since the medical instrument is sterilized using hot water or high-temperature steam, a medical instrument having low heat resistance such as rubber or resin is likely to be thermally deformed. In order to prevent such thermal deformation, the temperature of hot water or high temperature steam must be lowered, and the sterilization performance is lowered by lowering the temperature of hot water or high temperature steam.

  For this reason, rubber or resin-made medical instruments are often disposable because it takes time and labor to perform sufficient sterilization, and it is difficult to perform sufficient sterilization. The purchase cost of a medical device made of plastic or resin is enormous.

  An object of this invention is to provide the washing | cleaning sterilization apparatus which can wash | clean and sterilize reliably also to-be-washed | cleaned object with low heat resistance.

The cleaning and sterilizing apparatus of the present invention includes a housing for storing an object to be cleaned, a nozzle for injecting a cleaning liquid and ozone water toward the object to be cleaned housed in the housing, and a cleaning water in the housing. A cleaning mechanism that circulates the supplied cleaning liquid with a circulation pump and sprays it from the nozzle, and cleans an object to be cleaned contained in the casing with the cleaning liquid, and supplies ozone water into the casing. An ozone water sterilization mechanism that circulates the supplied ozone water with the circulation pump and injects it from the nozzle, and sterilizes the object to be cleaned contained in the housing with ozone water, and injects the ozone water from the nozzle The pressure of water was 0.05 Mpa or less and was made lower than the pressure of the cleaning liquid sprayed from the nozzle.

According to the cleaning and sterilizing apparatus of the present invention, there less 0.05Mpa pressure of the ozone water to be ejected from the nozzle, and, since the make lower so than the pressure of the cleaning liquid to be ejected from the nozzle, ozone ozone water Accordingly, it is possible to prevent the ozone concentration of ozone water from being lowered due to gas-liquid separation from the gas, and thus the bactericidal effect of ozone water can be maintained.

  A reference example of the present invention will be described with reference to FIG. In addition, the same part as the part demonstrated in FIG. 3 is demonstrated using the same code | symbol. The cleaning and sterilizing apparatus of this reference example is an apparatus that cleans and sterilizes a medical instrument (not shown) that is an object to be cleaned. The cleaning and sterilizing apparatus includes a casing 11 that houses a medical instrument to be cleaned and sterilized. Is a mounting table 2 on which a basket containing medical instruments is mounted, a rotary nozzle 3 positioned above and below the mounting table 2, a heater (not shown) for heating the air in the housing 1, A fan (not shown) that blows air heated by the heater toward the medical instrument placed on the placement table 2 is provided.

  A tap water pipe 4 for supplying tap water, a hot water pipe 12 for supplying hot water, a detergent pipe 6 for supplying detergent from a detergent tank (not shown), and ozone water production are provided on the side surface of the casing 11. An ozone water pipe 14 to which ozone water produced by the device 13 is supplied is connected. A tap water pipe 15 for supplying tap water and an oxygen gas pipe 16 for supplying oxygen gas from an oxygen gas tank (not shown) are connected to the ozone water production apparatus 13. An electromagnetic valve 15 a is provided in the middle of the tap water pipe 4, an electromagnetic valve 4 a is provided in the middle of the tap water pipe 15, an electromagnetic valve 12 a is provided in the middle of the hot water pipe 12, and in the middle of the oxygen gas pipe 16. Is provided with a solenoid valve 16a, and a detergent supply pump 6a is provided in the middle of the detergent pipe 6.

  On the bottom surface of the casing 11, an outflow pipe for allowing tap water, hot water and detergent supplied in the casing 11, a cleaning liquid in which warm water and detergent are mixed, ozone water, or the like to flow out of the casing 11. 7 is connected. The outflow pipe 7 is bifurcated at its tip, one being a water guide pipe 8 that guides the cleaning liquid and ozone water to the nozzle 3, and the other being a drain pipe 9 that drains the cleaning liquid and ozone water. A filter 7a is provided in the middle of the outflow pipe 7 to remove the cleaning liquid flowing in the outflow pipe 7 and dust contained in the ozone water. Two electromagnetic valves 8a and 8b and a circulation pump are provided in the middle of the water guide pipe 8. 8c, and a solenoid valve 9a is provided in the middle of the drain pipe 9.

  Here, the cleaning sterilization apparatus is provided with a cleaning mechanism 17 for cleaning the medical instrument placed on the mounting table 2 with a cleaning liquid and an ozone water sterilization mechanism 18 for sterilizing the cleaned medical instrument with ozone water. It has been. The cleaning mechanism 17 includes a tap water pipe 4, a hot water pipe 12, a detergent pipe 6, an outflow pipe 7, a water guide pipe 8, a nozzle 3, electromagnetic valves 4a, 12a, 8a, and 8b, a detergent supply pump 6a, and a circulation pump 8c. ing. The ozone water sterilization mechanism 18 includes a tap water pipe 15, an oxygen gas pipe 16, an ozone water production apparatus 13, an ozone water pipe 14, and electromagnetic valves 15a and 16a.

  Level switches 10 for detecting that the electromagnetic valves 4a, 8a, 8b, 9a, 12a, 15a, the pumps 6a, 8c, the heaters and fans, the cleaning liquid and ozone water accumulated in the casing 11 have reached a predetermined amount. , 19 are connected to a control unit (not shown) using a microcomputer.

  In such a configuration, a procedure for cleaning and sterilizing a medical instrument using the cleaning and sterilizing apparatus will be described. First, a lid (not shown) of the housing 11 is opened, a basket containing medical instruments is placed on the mounting table 2, and the lid is closed. In this state, all the electromagnetic valves 4a, 8a, 8b, 9a, 12a, 15a, 16a are closed, and the pumps 6a, 8c, the heater, the fan, etc. are stopped.

  When the start button is pressed after the cover of the casing 11 is closed, the solenoid valves 4a and 12a are opened to supply tap water and hot water into the casing 11, and the detergent supply pump 6a is driven to move the detergent. A cleaning liquid of low-temperature water (for example, 40 ° C.) in which tap water, hot water, and a detergent are mixed is stored in the casing 11. When the level switch 10 detects that the cleaning liquid accumulated in the housing 11 has reached a predetermined amount, the electromagnetic valves 4a and 12a are closed based on the detection result, the detergent supply pump 6a is stopped, and the electromagnetic The valves 8a and 8b are opened, and the circulation pump 8c is driven.

  As a result, the low-temperature water cleaning liquid accumulated in the casing 11 flows through the outflow pipe 7 and the water guide pipe 8 and is injected from the nozzle 3, and the nozzle 3 rotates in the horizontal plane by the reaction force of the injection, The medical instrument mounted on the mounting table 2 is washed. This cleaning mainly removes proteins such as blood adhering to the medical device. When this cleaning is performed for a predetermined time, the solenoid valves 8a and 8b are closed and the driving of the circulation pump 8c is stopped. Further, the solenoid valve 9a is opened, and the low-temperature water used for cleaning the medical instrument. The cleaning liquid flows through the outflow pipe 7 and the drain pipe 9 to be drained.

  In this cleaning process, ozone water may be used, whereby germs contained in the drained cleaning liquid can be sterilized, and wastewater treatment in the hospital facility is reduced.

  After the low-temperature water cleaning liquid is drained, the solenoid valve 12a is opened to supply hot water into the casing 11, and the detergent supply pump 6a is driven to supply the detergent into the casing 11. A high temperature (for example, 60 ° C.) cleaning liquid in which hot water and a detergent are mixed is accumulated in the inside. When the level switch 10 detects that the cleaning liquid accumulated in the housing 11 has reached a predetermined amount, the electromagnetic valve 12a is closed based on the detection result, the detergent supply pump 6a is stopped, and the electromagnetic valve 8a. , 8b are opened, and the circulation pump 8c is driven.

  As a result, the high-temperature cleaning liquid accumulated in the casing 11 flows through the outflow pipe 7 and the water guide pipe 8 and is injected from the nozzle 3, and the nozzle 3 is rotated in the horizontal plane by the reaction force of the injection. The medical instrument placed on the table 2 is washed. In this cleaning, mainly the oil and fat adhering to the medical instrument is removed. When this cleaning is performed for a predetermined time, the solenoid valves 8a and 8b are closed and the driving of the circulation pump 8c is stopped. Further, the solenoid valve 9a is opened, and the high-temperature cleaning liquid used for cleaning the medical instrument is used. Is discharged through the outflow pipe 7 and the drainage pipe 9.

  After performing two-stage cleaning with cleaning liquids having different temperatures as described above, sterilization by the ozone water sterilization mechanism 18 is performed. In this sterilization process, the electromagnetic valves 15a and 16a are opened, tap water and oxygen gas are supplied into the ozone water production apparatus 13, ozone water is produced in the ozone water production apparatus 13, and produced ozone water. Is supplied into the housing 11.

  When the level switch 19 detects that the ozone water accumulated in the casing 11 has reached a predetermined amount, the electromagnetic valves 15a and 16a are closed based on the detection result, and the supply of ozone water is stopped. . When ozone water is detected by the level switch 19, the medical instrument placed on the mounting table 2 is immersed in the ozone water accumulated in the housing 11, and the medical instrument is immersed in the ozone water. By maintaining for a predetermined time (for example, 10 to 20 minutes), the medical instrument is sterilized with ozone water. Since the medical device is sterilized with the ozone water by immersing the medical device in the ozone water, the ozone water enters every corner of the medical device and can sterilize every corner of the medical device.

  After the medical instrument is sterilized with ozone water for a predetermined time, the electromagnetic valve 9 a is opened and the ozone water is drained from the drain pipe 9. After the ozone water is drained, the heater and fan are driven, and the air heated by the heater is blown by the fan toward the medical instrument that has been cleaned and sterilized. finish.

  In this reference example, the cleaning and sterilization apparatus provided with the hot water pipe 12 for supplying hot water has been described as an example. However, such a hot water pipe 12 is not provided, and a heater for heating tap water in the housing 11 is provided. And the temperature of the cleaning liquid may be appropriately adjusted by heating the tap water with this heater.

  Moreover, in this reference example, just before performing sterilization with ozone water, only tap water may be jetted from the nozzle 3 to rinse the medical device.

  Furthermore, it is also effective to provide a mechanism for spraying a rust preventive agent from the nozzle 3 to the medical device before the sterilization with ozone water is completed and the drying process is started.

  Next, an embodiment of the present invention will be described with reference to FIG. In addition, the same part as the part demonstrated in FIG. 1 is shown with the same code | symbol, and description is also abbreviate | omitted. The basic structure of the cleaning and sterilizing apparatus of the present embodiment is the same as that of the cleaning and sterilizing apparatus shown in FIG. 1, and the configuration of an ozone water sterilizing mechanism 20 that sterilizes a cleaned medical instrument with ozone water is different.

  An outflow pipe 7 is connected to the bottom surface of the housing 11, and the tip of the outflow pipe 7 is branched into a water guide pipe 8 and a drain pipe 9. Two solenoid valves 8a and 8b and a circulation pump 8c are provided in the middle of the water guide pipe 8, and an inverter 21 for reducing the rotational speed of the circulation pump 8c is provided.

  Here, the cleaning sterilization apparatus is provided with a cleaning mechanism 17 for cleaning the medical instrument placed on the mounting table 2 with a cleaning liquid and an ozone water sterilization mechanism 20 for sterilizing the cleaned medical instrument with ozone water. It has been. As in the reference example, the cleaning mechanism 17 includes a tap water pipe 4, a hot water pipe 12, a detergent pipe 6, an outflow pipe 7, a water guide pipe 8, a nozzle 3, electromagnetic valves 4a, 12a, 8a, 8b, and a detergent supply pump 6a. The circulation pump 8c is used. The ozone water sterilization mechanism 20 includes a tap water pipe 15, an oxygen gas pipe 16, an ozone water production device 13, an ozone water pipe 14, an outflow pipe 7, a water pipe 8, electromagnetic valves 8 a, 8 b, 15 a and 16 a, a circulation pump 8 c, and an inverter. 21.

  Level switches 10 for detecting that the electromagnetic valves 4a, 8a, 8b, 9a, 12a, 15a, the pumps 6a, 8c, the heaters and fans, the cleaning liquid and ozone water accumulated in the casing 11 have reached a predetermined amount. The inverter 21 and the like are connected to a control unit (not shown) using a microcomputer.

  In such a configuration, the procedure for cleaning and sterilizing a medical instrument using the cleaning and sterilizing apparatus is substantially the same as the procedure for cleaning and sterilizing using the cleaning and sterilizing apparatus of the reference example described above. A different point is a sterilization process using ozone water, and only this sterilization process will be described.

  A medical instrument to be cleaned and sterilized is placed on the mounting table 2 in the housing 11, and two-stage cleaning is performed with cleaning liquids having different temperatures. After this cleaning, the ozone water sterilization mechanism 20 performs sterilization. In this sterilization process, the electromagnetic valves 15a and 16a are opened, tap water and oxygen gas are supplied into the ozone water production apparatus 13, ozone water is produced in the ozone water production apparatus 13, and produced ozone water. Is supplied into the housing 11.

  When the level switch 10 detects that the amount of ozone water accumulated in the housing 11 has reached a predetermined amount, the solenoid valves 15a and 16a are closed based on the detection result, and the supply of ozone water is stopped. . Further, the electromagnetic valves 8a and 8b are opened, and the circulation pump 8c is driven.

  Thereby, the ozone water accumulated in the casing 11 flows through the outflow pipe 7 and the water guide pipe 8 and is injected from the nozzle 3, and the nozzle 3 rotates in the horizontal plane by the reaction force of the injection, and the mounting table 2 is sterilized. In this case, the circulation pump 8c has a rotational speed reduced by the inverter 21 as compared with the case where the cleaning liquid is injected from the nozzle 3, and the pressure of the ozone water injected from the nozzle 3 is set to 0.05 Mpa or less. ing. After the medical instrument is sterilized by injecting ozone water from the nozzle 3, the electromagnetic valves 8a and 8b are closed, the rotation of the circulation pump 8c is stopped, and the electromagnetic valve 9a is opened. The ozone water is drained by flowing through the outflow pipe 7 and the drain pipe 9.

  After the ozone water is drained, the heater and fan are driven, and the air heated by the heater is blown by the fan toward the medical instrument that has been cleaned and sterilized. finish.

  Here, in the cleaning and sterilizing apparatus according to the present embodiment, the cleaning liquid is sprayed from the nozzle 3 onto the medical instrument, so that the cleaning liquid sprayed from the nozzle 3 strikes the medical instrument vigorously. As a result, dirt attached to the medical device can be removed by nozzle water pressure, and the cleaning effect by the cleaning liquid is enhanced. In addition, when ozone water is injected from the nozzle 3, the inverter 21 reduces the rotational speed of the circulation pump 8c, and the pressure of the ozone water injected from the nozzle 3 is set to 0.05 Mpa or less, so that ozone is removed from the ozone water. A decrease in the ozone concentration of ozone water due to liquid separation can be prevented, and the bactericidal effect of ozone water can be maintained.

  In this embodiment, the case where ozone water is injected from the nozzle 3 has been described by taking as an example the case where the rotation speed of the circulation pump 8c is lowered by the inverter 21, but a bypass line is provided in the circulation pump 8c. The line may be turned on / off with an electromagnetic valve to change the discharge pressure of the circulation pump 8c.

  Further, in the present embodiment, the case of performing the cleaning liquid injection and the ozone water injection using the same nozzle 3 has been described as an example. However, the nozzle for injecting the cleaning liquid and the nozzle for injecting the ozone water are provided. It may be provided separately.

It is the schematic which shows the reference example of this invention. It is the schematic which shows one Embodiment of this invention. It is the schematic which shows a prior art example.

Explanation of symbols

3 Nozzle 11 Housing 17 Cleaning mechanism 18, 20 Ozone water sterilization mechanism

Claims (3)

A housing for storing objects to be cleaned;
A nozzle for injecting a cleaning liquid and ozone water toward an object to be cleaned housed in the housing;
A cleaning mechanism that supplies cleaning water into the housing, circulates the supplied cleaning liquid through a circulation pump and sprays it from the nozzle, and cleans an object to be cleaned contained in the housing with the cleaning liquid;
An ozone water sterilization mechanism that supplies ozone water into the housing, circulates the supplied ozone water by the circulation pump and sprays the ozone water from the nozzle, and sterilizes an object to be cleaned contained in the housing with ozone water; ,
Wherein the a pressure of ozone water to be ejected from the nozzle at 0.05Mpa or less, than the pressure of the cleaning liquid to be ejected from the nozzle was make lower so, cleaning and sterilizing device, characterized in that.   The rotation speed of the circulation pump when circulating the ozone water is lower than the rotation speed of the circulation pump when circulating the cleaning liquid, and thereby the ozone water ejected from the nozzle rather than the pressure of the cleaning liquid ejected from the nozzle 2. The cleaning and sterilizing apparatus according to claim 1, wherein the pressure of the apparatus is reduced.   The bypass pump is provided with a bypass line, and the bypass line is turned on / off by a solenoid valve to change the discharge pressure of the circulating pump, whereby the ozone injected from the nozzle rather than the pressure of the cleaning liquid injected from the nozzle 2. The cleaning and sterilizing apparatus according to claim 1, wherein the water pressure is lowered.

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