TWI590840B - Staged steam control method for sterilizing pot - Google Patents

Description

Stage steam control method for sterilizing pot

The invention relates to a method for venting a sterilizing pot, in particular to a stage steam regulating method for sterilizing a pot by using the temperature of the liquid in the sterilizing pot and the heating time thereof.

According to Infection Control Today, innovations in medical device and consumable sterilization technologies have become an important aspect of infection control; in the past, sterilization technology had to be sterilized by placing a single potato together with a sterilized item. In the pot; after the sterilization process is finished, by observing whether the potato is cooked, it is judged whether the object to be sterilized has reached the sterilization state; so far, medical experts have learned the conditions required for monitoring and sterilization, including temperature, time and sterilization. The contact of the object, etc., can determine whether the sterilization process is effective, and has passed the mechanical and electronic control, the chemical indicator or the biological indicator, etc., and then physically or chemically or completely sterilizes the object to be sterilized, and can confirm the object to be sterilized Whether it is sterilized during the sterilization process.

Sterilization is defined as the sterilization process by physically or chemically destroying all microorganisms, including all bacterial propagules, spores, viruses, molds; physical methods, including Steam Sterilization Dry Heat Sterilization, Radiation Sterilization, and Plasma Sterilization. Steam sterilization is used in the sterilization control of sterilizers. The principle is based on a certain pressure. The heat, humidity and energy of the saturated steam cause the microbial protein to coagulate and denature, which can not be restored, and the effect of killing microorganisms is achieved. The steam sterilization method is used for the sterilization pot, and can be classified into a Gravity Displacement Sterilizer according to the sterilization method. High-Speed Vacuum Sterilizer, in which a gravity-type steam sterilizer uses steam to enter a pot from a steam inlet. The sterilizer is based on the saturated steam pressure generated by saturated steam to saturate the sterilizer. The steam can be sterilized by the saturated steam pressure to completely sterilize the object to be sterilized; and the rapid vacuum sterilizer is an improved design of the gravity type steam sterilizer, and the air in the sterilizing pot is first taken out of the pot through an air suction device, so that The inner cavity is almost in a vacuum state, and then the saturated steam is injected into the inner cavity by spraying, so that the air can be effectively evacuated, so that the efficiency of vapor permeation into the sterilization bag can be improved.

Moreover, both the gravity steam sterilizer and the fast vacuum sterilizer generate saturated steam to fill the surface of the object to be sterilized by generating sufficient saturated steam, wherein the ratio of air content to steam content in the interior of the sterilizer and in the pipeline That is, the unsaturated steam ratio is also called steam quality, and the design of the sterilization pot is preferably that the unsaturated steam content is less than 3.5%, but according to the current temperature of the sterilization pot, in order to increase the temperature and pressurization in the sterilization pot, The temperature is up to the sterilization temperature to stop the warming and pressurization. The common sterilization temperature in the current situation falls to 121 degrees Celsius to 134 degrees Celsius, and the sterilization temperature has a corresponding relationship with the time. The shorter the sterilization time, the use is required. The higher sterilization temperature, the unsaturated steam ratio is also the poorer steam quality, so that the object to be sterilized forms an air film due to the difference in surface structure and temperature, and the air film blocks the steam from contacting the object to be sterilized. The surface, which in turn prevents the surface of the object to be sterilized from being lifted to the desired sterilization temperature, although it is currently not transparent through the arrangement of the water eliminator and the vacuum pump Significantly improve the steam quality between the sterilizer and the supply line.

According to the above, the sterilization method of the conventional sterilization pot, although capable of heating, pressurizing, or even vacuum exhausting, cannot reduce the formation of an air film around the object to be sterilized, lowering the ratio of unsaturated steam, and failing to increase the steam thereof. quality. Therefore, how to provide a stage steam regulation method for a sterilizing pot, improve the problem of forming an air film around the object to be sterilized, and thereby improve the steam quality, has become an important subject for researchers involved in the industry.

The main object of the present invention is to provide a stage steam regulating method for a sterilizing pot, thereby reducing the ratio of unsaturated steam in the sterilizing tank and the pipeline.

A secondary object of the present invention is to provide a staged steam control method for a sterilizing pot, thereby reducing the air film formed around the object to be sterilized.

In order to achieve the above-mentioned various purposes and effects, the stage steam regulating method for a sterilizing pot of the present invention comprises the steps of: heating a liquid storage tank in a sterilizing pot to make one liquid of the liquid storage tank a first operating temperature to a second operating temperature, opening a first exhaust valve for exhausting, the first exhaust valve is disposed on one side of the liquid storage tank; heating the liquid to a third operating temperature, opening the The first exhaust valve is exhausted; when the liquid is heated by more than one tenth of the latent heat temperature of the liquid, a control valve is opened, which is disposed between the liquid storage tank and a sterilization tank of the sterilization pot, the sterilization pot The sterilization tank receives the liquid to form a saturated steam, and opens a second exhaust valve of the sterilization tank for exhausting, after exhausting for a period of time, closing the second exhaust valve; and continuously heating the liquid storage The trough warms the sterilizing tank to a target sterilization temperature.

The present invention is a stage steam regulating method for a sterilizing pot, comprising two stages, the first stage is heating a liquid of one of the storage tanks of a sterilizing pot and transmitting the first exhaust gas through one of the liquid storage tanks The valve is exhausted, and is sequentially heated and exhausted according to the temperature or pressure of the liquid. The second stage is to open the connection control valve of the liquid storage tank and a sterilization tank after the liquid reaches the latent heat temperature of the liquid. The sterilization tank receives the liquid to form a vapor, and controls the temperature of the liquid to be heated and passes through the exhaust gas connected to the second exhaust valve of one of the sterilization tanks. To reduce the sterilizer The ratio of unsaturated steam between the inside and the pipe also improves the steam quality and brings it closer to the ideal saturated steam.

In an embodiment of the present invention, before the step of “heating the liquid to a third operating temperature and opening the first exhaust valve for exhausting”, the method comprises: when the liquid is heated to a fourth operating temperature, opening The first exhaust valve is vented.

In an embodiment of the invention, the first operating temperature, the second operating temperature, the third operating temperature, and the fourth operating temperature are all less than a latent heat temperature of the liquid.

In an embodiment of the invention, wherein the second exhaust valve is at a first exhaust time when exhausting, the first exhaust time is 180-600 seconds.

In one embodiment of the present invention, wherein: "When the liquid is heated by more than one tenth of the latent heat temperature of the liquid, a control valve is opened, and one of the sterilization tanks receives the liquid to form a saturated steam, and opens the Before the step of exhausting one of the second exhaust valves of the sterilization tank, the method comprises: when the liquid is heated to the latent heat temperature of the liquid, the first exhaust valve is opened for at least one exhaust, and has a second row Gas time.

In an embodiment of the invention, the second exhaust time of the first exhaust valve is 60-180 seconds.

In an embodiment of the invention, the target sterilization temperature is greater than the latent heat temperature of the liquid, and the target sterilization temperature is 121 to 134 degrees.

1‧‧‧Sterilizer

11‧‧‧ liquid storage tank

12‧‧‧Sterilization tank

13‧‧‧Control valve

14‧‧‧heater

15‧‧‧First exhaust valve

16‧‧‧Second exhaust valve

17‧‧‧Inlet valve

First: it is a block diagram of an embodiment of a stage steam regulation method for a sterilization pot of the present invention; The second figure is a first step flow chart of one of the embodiments of the stage steam regulation method for the sterilization pot of the present invention; the third figure is the stage steam regulation method for the sterilization pot of the present invention A second step flow chart of one of the embodiments; and a fourth figure: it is a third step flow chart of one of the embodiments of the stage steam regulating method for a sterilizing pan of the present invention.

For a better understanding and understanding of the features and advantages of the present invention, the preferred embodiments and the detailed description are given as follows: The present invention is directed to a sterilization method for a conventional sterilization pot. Although it can be heated, pressurized, or even vacuumed, it can not effectively reduce the formation of air film around the pipeline and interlayer between the steam and the object to be sterilized, and can not reduce the unsaturated steam ratio. Therefore, how to improve the problem of the formation of an air film around the steam between the pipeline and the interlayer and the object to be sterilized, thereby reducing the unsaturated steam ratio, is to provide a stage steam regulation method for the sterilizer, through two-stage regulation, The problem of reducing the formation of an air film around the steam between the pipeline and the interlayer and the object to be sterilized is reduced, thereby reducing the ratio of unsaturated steam and improving the quality of the steam.

Please refer to the first figure, which is a block diagram of an embodiment of a stage steam regulation method for a sterilization pot according to the present invention. As shown in the figure, the embodiment includes a sterilization pot 1 including a storage tank. a liquid tank 11 and a sterilizing tank 12, wherein the liquid storage tank 11 is disposed below the sterilizing tank 12, and a control valve 13 is disposed between the liquid storage tank 11 and the sterilizing tank 12, and the liquid storage tank 11 is provided There is a liquid, and the sterilization tank 12 is provided with a workpiece to be sterilized, and the control valve 13 is a pipeline for opening or blocking the liquid storage tank 11 and the sterilization tank 12.

The liquid in the liquid storage tank 11 is heated by a heater 14 to form a steam. When the control valve 13 is opened, the steam rises and enters the sterilization tank 12 through the control valve 13, so that the sterilization tank 12 receives the steam. Steam; when the control valve 13 is closed, the steam is stagnant in the liquid storage tank 11.

One side of the liquid storage tank 11 is provided with a first exhaust valve 15 . When the first exhaust valve 15 is opened, the liquid storage tank 11 is exhausted, and the exhaust gas is exhausted to reduce the liquid storage tank 11 . The air content is also a ratio of reducing the unsaturated steam content; when the first exhaust valve 15 is closed, the gas in the liquid storage tank 11 is not transmitted to the external environment.

A second exhaust valve 16 is disposed on one side of the sterilization tank 12, and when the second exhaust valve 16 is opened, the sterilization tank 12 is exhausted to pass through the exhaust gas to reduce the air content in the sterilization tank 12. Also, in order to reduce the unsaturated vapor content ratio; when the second exhaust valve 16 is closed, the gas in the sterilization tank 12 is not transmitted to the external environment.

The control valve 13, the first exhaust valve 15 and the second exhaust valve 16 are coupled to a controller, the controller controls the opening or closing of the valve through the input voltage, and the controller is coupled to the sterilization a temperature sensor or a pressure sensor in the pot 1, the temperature sensor or the pressure sensor is not limited to the position of the sterilizing pot 1, only to take the temperature or pressure of the sterilizing pot 1 The controller receives the signal of the temperature sensor or the pressure sensor, and outputs a corresponding voltage to the control valve 13, the first exhaust valve 15, and the second exhaust valve 16.

In addition, the liquid storage tank 11 is connected to a water inlet valve 17, and the water inlet valve 17 is also a solenoid valve. The liquid storage tank 11 is opened and closed by the water inlet valve 17, and the liquid storage tank 11 is adjusted. The content of the liquid.

Please refer to the second figure, which is a first step flow chart of one embodiment of the stage steam regulating method for a sterilizing pot of the present invention. As shown in the figure, the embodiment provides a stage type for sterilizing the pot. The steam control method comprises the following steps: Step S10: heating a liquid storage tank in a sterilizing pot to make a liquid of the liquid storage tank from a first operating temperature to a second operating temperature, and opening a first exhaust valve for exhausting, the first row a gas valve is disposed on one side of the liquid storage tank; step S20: heating the liquid to a third operating temperature, opening the first exhaust valve for exhausting; step S30: when the liquid is heated to exceed the latent heat temperature of the liquid In one part, a control valve is opened, which is disposed between the liquid storage tank and a sterilization tank of the sterilization pot, the sterilization tank of the sterilization pot receives the liquid to form one saturated steam, and opens one of the sterilization tanks. The second exhaust valve performs exhausting, and after the exhausting for a period of time, the second exhaust valve is closed; and step S40: continuously heating the liquid storage tank to raise the sterilization tank to a target sterilization temperature.

Before the step S10, the liquid storage tank 11 receives the liquid input from the water inlet valve 17, and the heater 14 heats the liquid storage tank 11 so that the temperature of the liquid in the liquid storage tank 11 is raised.

In step S10, the liquid is heated up to the first operating temperature, the first operating temperature is 31 degrees Celsius, the first exhaust valve 15 is opened for exhausting until the liquid is heated to the second operating temperature, the first The operating temperature is 39 degrees, and the first exhaust valve 15 is closed, and heating is continued, because the control valve 13 is not opened, so that the steam cannot enter the sterilization tank 12, and the liquid storage tank 11 is increased. The heat is convected so that the ratio of unsaturated steam in the liquid storage tank 11 is lowered.

In step S20, the liquid is heated to the third operating temperature, the third operating temperature is 51 degrees Celsius, the first exhaust valve 15 is opened for exhausting, and the first row is closed when heated to 59 degrees Celsius. The gas valve 15 is continuously heated until the temperature of the liquid reaches its latent heat temperature. When the liquid is water, the latent heat temperature is 100 degrees Celsius at normal temperature and normal pressure, and the preferred latent heat temperature of the present embodiment is required. Achieving a temperature of 98 degrees Celsius and performing a staged operation before the latent heat temperature can promote the heat convection efficiency of the liquid storage tank 11 and the pipeline.

In step S30, the liquid is continuously heated. If the liquid is water, the latent heat temperature is 100 degrees Celsius. When the liquid exceeds one tenth of its latent heat temperature, the liquid of the liquid storage tank 11 is also made. When the temperature is up to 110 degrees Celsius, the control valve 13 is opened, so that the sterilization tank 12 receives the saturated steam formed by the liquid in the liquid storage tank 11, and opens the second exhaust valve 16, so that the second exhaust valve 16 is turned on for a period of time, preferably a first exhaust time, that is, the range falls between 180 and 600 seconds, and the first exhaust time can be preset in the sterilization pot 1, and the sterilization tank 12 is driven by saturated steam. The air is vented to the external environment through the second exhaust valve 16, and after the exhaust is completed, the second exhaust valve 16 is closed and then continues to be heated by the heater 14.

In step S40, the liquid storage tank 11 is continuously heated to achieve a target sterilization temperature of 121 to 134 degrees Celsius, thereby killing all bacterial propagules, spores, viruses and molds. The sterilization process is achieved, and the sterilization effect is increased by maintaining the target sterilization temperature, and the air content of the sterilization tank 12 in the sterilization pot 1 can be reduced to 1.03 to 1.21%, that is, the sterilization tank 12 is lowered. The ratio of unsaturated steam to enhance the sterilization effect of the object to be sterilized.

Accordingly, the stage steam regulating method provided by the embodiment can improve the problem of the formation of an air film around the pipeline, the interbed between the steam and the object to be sterilized, thereby reducing the unsaturated steam ratio, according to the liquid before and after the latent heat temperature. Further, it is divided into two stages for regulation, so as to reduce the problem of air film between the pipeline and the interlayer and the air film formed around the object to be sterilized, thereby reducing the unsaturated steam ratio and improving the steam quality.

Please refer to the third figure, which is a flow chart of a second step of an embodiment of the present invention. As shown in the figure, the present embodiment is a detailed operation in steps S10 to S20 of the previous embodiment, so steps S10 to S40 are not It is to be noted that, in this embodiment, before the liquid reaches the latent heat temperature of the liquid, the stage can be heated and ventilated to improve the heat convection efficiency in the sterilizing pot 1. Therefore, the embodiment further includes the following steps: Step S10 Heating a liquid storage tank in a sterilizing pot to open a first exhaust valve for exhausting a liquid of the liquid storage tank from a first operating temperature to a second operating temperature; Step S11: heating the liquid to a fourth operating temperature, opening the first exhaust valve for exhausting; and step S20: heating the liquid to a third operating temperature, and opening the first exhaust valve for exhausting.

In step S11, the liquid is heated up to the fourth operating temperature, the fourth operating temperature is 41 degrees Celsius, and the first exhaust valve 15 is opened for exhausting until the liquid reaches the fifth operating temperature. The operating temperature is 49 degrees, thereby closing the first exhaust valve 15, and continuing to heat, so that the unsaturated steam ratio in the liquid storage tank 11 is lowered, and since the control valve 13 is not opened, the Steam cannot enter the sterilization tank 12, so that the convection efficiency of the steam in the liquid storage tank 11 is improved.

Therefore, in this embodiment, step S11 is added between steps S10 and S20 of the previous embodiment to increase the detailed operation of the first stage, that is, the steps S10 to S20 before the liquid reaches the latent heat temperature of the liquid, so that the heat is generated. The convection efficiency is increased while also achieving the effects of the foregoing embodiments.

Please refer to the fourth figure, which is a third step flow chart of one embodiment of the present invention. As shown in the figure, the present embodiment is a detailed operation in steps S20 to S30 of the previous embodiment, so steps S10 to S40 are not Further, in the present embodiment, before the liquid is heated to more than one tenth of the latent heat temperature of the liquid, the first exhaust valve 15 is heated and vented in stages to reduce the air content in the liquid storage tank 11, thereby The embodiment further includes the following steps: Step S20: heating the liquid to a third operating temperature, opening the first exhaust valve for exhausting, and closing the first exhaust valve when heated to 59 degrees Celsius, and then continuing Heating until the temperature of the liquid reaches its latent heat temperature; step S21: when the liquid is heated to the latent heat temperature of the liquid, the first exhaust valve is opened for at least one exhaust, which has a second exhaust time; Step S30: when the liquid is heated by more than one tenth of the latent heat temperature of the liquid, a control valve is opened, and one of the sterilization tanks receives the liquid to form one saturated steam, and opens one of the sterilization tanks and the second exhaust The valve is vented.

In step S21, in order to match the energy required for the liquid to change in phase, it is provided for a long time so that the liquid can generate sufficient and stable saturated steam. When the temperature of the water is as high as 102 degrees Celsius, the first An exhaust valve 15, the exhaust gas has a second exhaust time, and the second exhaust time is 60 to 180 seconds, and at least one exhaust time is performed before continuing to heat the liquid until the liquid exceeds one-tenth of the latent heat temperature. And in the phase change of the liquid, the relative pressure between the inside of the sterilization tank 12 and the external environment is about 0.43 bar, so it takes a long time to discharge the unsaturated steam in the steam to the external environment.

Therefore, in this embodiment, step S21 is added between steps S10 and S40 of the previous embodiment, and the detail operation before the second stage is added. The second stage is the operation after the liquid is heated to the latent heat temperature, by detail. The operation changes the pressure inside the sterilizing pot 1 and its piping, and an appropriate venting time is set according to the pressure, thereby reducing the air content inside the sterilizing pot 1 and its piping, and at the same time achieving the effects of the foregoing embodiments.

In summary, the present invention provides a stage steam regulating method for a sterilizing pot, which heats the liquid storage tank of the sterilizing pot to raise the liquid of the liquid storage tank from the first operating temperature to the second operating temperature for exhausting. And, heating the liquid from the second operating temperature to the third operating temperature, and performing the exhausting again; after the liquid is heated to a temperature exceeding one tenth of the latent heat temperature of the liquid, opening a control valve connecting the liquid storage tank and the sterilization tank, The sterilization tank of the sterilization pot receives the saturated steam formed by the liquid, opens the second exhaust valve for exhausting, and exhausts a first exhaust time. In addition, the present invention can increase the fourth operating temperature and the fifth operating temperature to increase the temperature and the exhaust operation before the liquid is heated to the latent heat temperature. Further, the present invention can continue to perform heating and heating after the liquid is heated to the latent heat temperature. The first exhaust valve is vented at least once until the liquid is warmed to one tenth of its latent heat temperature The control valve between the liquid tank and the sterilization tank is opened, and is exhausted through the second exhaust valve to continuously heat to the target sterilization temperature, whereby the present invention can improve the formation of air between the pipeline, the interlayer interlayer steam and the object to be sterilized. The problem of the membrane, thereby reducing the unsaturated steam ratio, reduces the problem of the formation of an air film around the steam between the pipeline and the interlayer and the object to be sterilized, thereby reducing the ratio of unsaturated steam and improving the quality of the steam.

Therefore, the present invention is a novelty, progressive and available for industrial use. It should be in accordance with the requirements of patent applications for patent law in China. It is undoubtedly to file an invention patent application according to law, and the Prayer Council will grant patents as soon as possible.

However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that the shapes, structures, features, and spirits described in the claims of the present invention are equally changed. Modifications are intended to be included in the scope of the patent application of the present invention.

1‧‧‧Sterilizer

11‧‧‧ liquid storage tank

12‧‧‧Sterilization tank

13‧‧‧Control valve

14‧‧‧heater

15‧‧‧First exhaust valve

16‧‧‧Second exhaust valve

17‧‧‧Inlet valve

Claims (7)

A stage steam regulating method for a sterilizing pot, comprising the steps of: heating a liquid storage tank in a sterilizing pot to open a liquid from a first operating temperature to a second operating temperature of the liquid storage tank; The first exhaust valve is exhausted, the first exhaust valve is disposed on one side of the liquid storage tank; heating the liquid to a third operating temperature, opening the first exhaust valve for exhausting; when the liquid is heated Exceeding one tenth of the latent heat temperature of the liquid, opening a control valve disposed between the liquid storage tank and one of the sterilization tanks of the sterilization pot, the sterilization tank of the sterilization pot receiving the liquid to form a saturated steam, And opening a second exhaust valve of the sterilization tank for exhausting, and closing the second exhaust valve after exhausting; and continuously heating the liquid storage tank to raise the sterilization tank to a target sterilization temperature. The stage steam regulating method for a sterilizing pot according to the first aspect of the invention, wherein the step of "heating the liquid to a third operating temperature and opening the first exhaust valve for venting" includes : When the liquid is heated to a fourth operating temperature, the first exhaust valve is opened for exhaust. The stage steam regulating method for a sterilizing pot according to the second aspect of the invention, wherein the first operating temperature, the second operating temperature, the third operating temperature, and the fourth operating temperature are all smaller than the liquid Latent heat temperature. The stage steam regulating method for a sterilizing pot according to the first aspect of the invention, wherein the second exhaust valve is at a first exhaust time when exhausting, the first exhaust time is 180-600 second. The stage steam regulating method for a sterilizing pot according to claim 1, wherein "when the liquid is heated by more than one tenth of the latent heat temperature of the liquid, a control valve is opened, and one of the sterilizing pots is sterilized. The tank receives the liquid to form one of the saturated steam and opens Before the step of exhausting the second exhaust valve of the sterilization tank, the method comprises: when the liquid is heated to the latent heat temperature of the liquid, opening the first exhaust valve to perform at least one exhaust, which has a second Exhaust time. The stage steam regulating method for a sterilizing pot according to claim 5, wherein the second exhausting time of the first exhaust valve is 60 to 180 seconds. The stage steam regulating method for a sterilizing pot according to the first aspect of the invention, wherein the target sterilization temperature is greater than a latent heat temperature of the liquid, and the target sterilization temperature is 121 to 134 degrees.