CN111420078A - High-pressure steam sterilization device and sterilization method - Google Patents

Abstract

A high-pressure steam sterilization device comprises a sterilization container (1), an air outlet pipeline (2), a controllable valve (3) and a filter (4), wherein the filter (4) is arranged in a closed filter container (6), and the connection between the sterilization container (1) and the filter container (6) is realized through the air outlet pipeline (2); the sterilization container also comprises a control unit (7) and at least one sensor (81) capable of feeding back the temperature of the sterilization container (1), wherein the control unit (7) receives a signal fed back by the sensor (81) and calculates the temperature, and controls the opening/closing of the controllable valve (3) according to a preset trigger condition, so that the filter (4) arranged in the filter container (6) is effectively sterilized, and the cross contamination of the filter (4) and the loading material of the sterilization container (1) is avoided; meanwhile, the condensed water in the filter container (6) automatically flows back into the sterilization container (1), so that the safe operation of the sterilization device is realized.

Description

High-pressure steam sterilization device and sterilization method

Technical Field

The invention relates to a sterilization device, in particular to a safe high-pressure steam sterilization device and a sterilization method, and the sterilization device can be applied to biological laboratories of BS L3 and BS L4 grades.

Background

Traditional high pressure steam sterilization apparatus, generally through form the high-temperature high-pressure saturated steam and disinfect at the sterilization container intracavity, the external controllable valve who gives vent to anger the pipeline and control the pipeline break-make of giving vent to anger of sterilization container, simultaneously to new crown epidemic situation, there is some producers to install filter equipment additional in the exit of giving vent to anger the pipeline, a be used for avoiding harmful substance to outwards discharge, but neglected the sterilization to possibly remaining the harmful substance in giving vent to anger the pipeline, lead to when sterilization container finishes the sterilization operating condition, remain to the harmful substance backward flow to the sterilization container in the pipeline of giving vent to anger, treat the sterilization article in the sterilization container and carry out secondary pollution, or when opening the sterilization chamber upper cover and escaping, harmful substance is outside, cause the virus to leak.

In view of the above, the present inventors have made extensive studies on the above-mentioned drawbacks of the prior art, and have made this invention.

Disclosure of Invention

The invention aims to provide a sterilization device with high safety protection level, which is characterized in that a filter container is additionally arranged on a filter, and the filter container and the sterilization container are sterilized synchronously, so that secondary pollution of harmful substances remained in an air outlet pipeline or the filter to the sterilization container is avoided to the maximum extent, pathogenic factors are prevented from being transmitted in the form of aerosol and the like, liquid possibly remained in the filter container is made to flow back to the sterilization container, and pollution to personnel, animals, plants and the environment caused by discharging of the liquid which is not sterilized or filtered is avoided.

The second objective of the present invention is to provide a technical means for monitoring whether the filter in the filter container is damaged or failed in real time under the premise of implementing the synchronous sterilization of the filter container and the sterilization container, so as to avoid the leakage of pollutants or viruses due to the failure of the filter.

A third object of the present invention is to provide a sterilization method suitable for the above sterilization apparatus.

In order to realize the first purpose of the invention, the invention discloses a high-pressure steam sterilization device, which comprises a sterilization container, an air outlet pipeline, a controllable valve and a filter, wherein high-pressure steam is formed in the sterilization container; the air inlet end of the air outlet pipeline is hermetically connected with the sterilization container, and the air outlet end of the air outlet pipeline is communicated with the filter; the controllable valve is used for realizing the opening/closing of the air outlet pipeline, the filter is arranged in a closed filter container, the filter container at least comprises an inlet end and an outlet end, the inlet end of the filter container is arranged at the lower position of the filter container, the inlet end of the filter container is hermetically connected with the air outlet end of the air outlet pipeline, the outlet end of the filter container is hermetically connected with an air passage of the filter, and the height of the inlet end of the filter container is greater than that of the air inlet end of the air outlet pipeline; the sterilization device also comprises a control unit and a first sensor used for monitoring the temperature in the sterilization container, wherein the control unit obtains the temperature value of the sterilization container by receiving the first sensor and outputs a control instruction to the controllable valve to control the opening/closing of the controllable valve according to a preset trigger condition so as to ensure that the sterilization container and the filter container synchronously reach the sterilization temperature for sterilization when the sterilization device is in a working state.

By adopting the arrangement, because the inlet end of the filter container is arranged at the lower position of the filter container and is higher than the air inlet end of the air outlet pipeline, the liquid substance in the filter container conveniently flows back to the sterilization container through the air outlet pipeline, so that the harmful substance is prevented from being remained in the filter container, and the filter container is communicated with the sterilization container, so that the sterilization container synchronously reaches the sterilization temperature, the harmful substance remained on the filter can be inactivated, and the pollution to personnel, animals, plants and the environment caused by the discharge of the liquid which is not subjected to sterilization or filtration is avoided.

Preferably, the controllable valve is arranged on a connecting pipeline at the outlet end of the filter container.

Furthermore, the position of the connecting pipeline relative to the controllable valve is also connected with a throttling pipeline for low-flow exhaust in parallel.

The arrangement enables the gas discharged from the outlet end of the filter container to be discharged outwards at a low flow rate through the throttling pipeline, so that the reduction of the service life of the controllable valve caused by frequent opening/closing of the controllable valve can be avoided; and secondly, when the controllable valve is closed, the gas in the filter container can be discharged outwards continuously through the throttling pipeline in a small flow manner, so that the filter container cannot become a blind end, the flow of the gas in the filter container is accelerated, the flow of the gas in the sterilization container can be indirectly influenced, and the temperature distribution in the sterilization container and the filter container is more uniform.

Preferably, the outer end of the connecting pipeline is also connected with a condensing device and a condensed water collecting container, gas exhausted outwards from the filter container through the connecting pipeline passes through the condensing device, the gas part of the gas is exhausted outwards through the exhaust end to the atmosphere, and the liquid part of the gas returns to the condensed water collecting container through the liquid drainage end.

Preferably, the exhaust end of the condensing device is further externally connected with an exhaust channel, a water receiving tray is arranged below an air outlet of the exhaust channel, a flow guide pipeline is arranged at the bottom of the water receiving tray, the other end of the flow guide pipeline is communicated with the condensed water collecting container, and liquid water collected to the water receiving tray flows back to the condensed water collecting container through the flow guide pipeline.

The design of the condensing device, the collecting container and the water receiving tray is added, so that the influence of the discharged gas on the peripheral environment of the sterilizing device is avoided, such as the increase of the humidity of the peripheral environment or the direct discharge of condensed water to the ground to cause the humidity of the ground.

Preferably, the filter is a hydrophobic filter and consists of a filter element and an air passage, the air passage is arranged on the middle shaft part of the filter element, the filtering diameter of the filter element is not more than 0.2.um, and the filtering efficiency of particles is not less than 99.99%; the air entering the filter container is filtered by the filter element and is finally communicated with the outlet end of the filter container through the air passage, so that the discharged air is ensured not to have residual harmful substances, and the pollution to the external environment is avoided.

In order to achieve the second object of the invention, a sensor for monitoring the change of the pressure difference between the input side A and the output side B of the filter element is additionally arranged, the sensor is connected with a control unit, and the control unit judges the pressure difference between the input side A and the output side B of the filter element by receiving the value fed back by the sensor, so as to judge whether the filter element is damaged.

In one embodiment, the sensor may be configured to add a first pressure sensor to the input side a of the filter cartridge and a second pressure sensor to the output side B of the filter cartridge;

in one embodiment, a differential pressure sensor is additionally arranged between the input side A and the output side B of the filter element.

In one embodiment, the filter container is laterally and obliquely arranged outside the sterilization container, and the inlet end is positioned on one side end face of the filter container which is obliquely downward.

In one embodiment, the filter container is vertically arranged outside the sterilization container, and the inlet end is positioned on the bottom end surface of the filter container.

The above design is designed to make the liquid material in the filter container flow back into the sterilization container more smoothly.

Furthermore, at least one auxiliary inlet end is additionally arranged on one side of the filter container far away from the inlet end, and the auxiliary inlet end is connected with a steam heat source in the sterilization container through a new gas outlet pipeline which is connected by side, or is connected with a pipeline which is branched on the original gas outlet pipeline.

The design increases the heat source led into the filter container, shortens the temperature rising process of the filter container, accelerates the flow of gas in the filter container and enables the temperature in the filter container to be more uniform.

In one embodiment, the first sensor for monitoring the temperature in the sterilization container is a first temperature sensor or a third pressure sensor, and the control unit comprises a timer for presetting the heating time T to ensure that the sterilization temperature is synchronously reached between the sterilization container and the filter container when the sterilization device is in the working state.

In one embodiment, the sterilization device is provided with a first sensor for monitoring the temperature in the filter container, the first sensor is a first temperature sensor or a first pressure sensor, and the control unit compares the temperature between the sterilization container and the filter container respectively to ensure that the sterilization container and the filter container synchronously reach the sterilization temperature when the sterilization device is in a working state.

In order to achieve the third object of the present invention, the present invention discloses a sterilization method of an autoclave,

s1, placing a substance to be sterilized into a sterilization container, closing a cover body of the sterilization container to enable the sterilization container to be a sealed cavity, heating water in the container by connecting an external steam heat source or a heating device carried by the sterilization container, wherein the sterilization container is in a heating state, a control unit issues a control instruction at the moment, a controllable valve is opened, cold air enters an air outlet pipeline through the sterilization container at the moment, then enters a filter container, and is discharged from an outlet end of the filter container through an air passing passage of the filter;

s2, when the temperature of the sterilization container is raised to the preset sterilization temperature and the temperature of the filter container is synchronous with that of the sterilization container, the control unit closes the controllable valve, and the time point is taken as the starting time point for calculating the sterilization time length;

s3, when the sterilization maintaining stage is started after the set sterilization temperature is reached, once the control unit monitors that the temperature of the sterilization container or the filter container is lower than the threshold value and the supply quantity of the original heat source is continuously increased and is not improved, the control unit issues a control instruction to open the controllable valve, after the midway heating time period T1, part of gas in the sterilization container or the filter container is exhausted, and then the controllable valve is closed to perform sterilization; when the control unit monitors that the temperature of the sterilization container or the filter container is higher than a threshold value, the control unit issues a control instruction, stops or reduces the supply amount of the heat source, opens the controllable valve for a time period T2 if necessary, and closes the controllable valve for sterilization;

and S4, when the sterilization device finishes sterilization for a long time, closing the heat source in the sterilization container, opening the controllable valve by the control unit, and communicating the gas in the sterilization container with the outlet end of the filter container to gradually realize the cooling process and finish sterilization.

When a pressure sensor or a differential pressure sensor for determining whether or not the filter is broken is added to the sterilization apparatus, step 5 is added:

s5, once the control unit receives the signals fed back by the first pressure sensor and the second pressure sensor or the differential pressure sensor for monitoring whether the filter is damaged, the control unit sends a control instruction to close the controllable valve and sends an alarm signal outwards through the original display screen of the sterilization device or the additionally arranged indicator lamp no matter the controllable valve is in any state.

Since the filter has a certain number of using effects, in order to avoid the overdue use, the step 6 can be added on the basis of the steps S1-S4:

s6, the control unit will accumulate the sterilization times, once reaching the preset value, will send out the prompt signal of changing the filter through the original display screen or pilot lamp of the sterilization device.

By adopting the sterilization device and the sterilization method, the leakage of harmful substances in the sterilization device can be avoided to the maximum extent, and the overall safety of the sterilization process is improved.

Drawings

The detailed description, given as a non-limiting example, better explains what the invention includes and can be implemented, and moreover, refers to the accompanying drawings, in which:

FIG. 1 is a schematic view of a sterilization apparatus of the present invention provided with only a first sensor for monitoring the temperature of the sterilization vessel;

FIG. 2 is a schematic view of the sterilization apparatus according to the present invention with a throttle pipe;

FIG. 3 is a schematic view of a sterilization apparatus according to the present invention with a condensing unit and a condensed water collecting container;

FIG. 4 is a schematic view of a water pan provided between a condensation device and a condensate water collection container of the sterilization apparatus of the present invention;

FIG. 5 is a schematic view of a sterilization apparatus according to the present invention with a second sensor added to the filter container for monitoring temperature;

FIG. 6 is a schematic view of the sterilization apparatus of the present invention with differential pressure sensors added on the input side A and the output side B of the filter element;

FIG. 7 is a schematic view of the sterilization apparatus of the present invention with additional pressure sensors on the input side A and the output side B of the filter element;

FIG. 8 is a schematic view of the filter container of the sterilization unit of the present invention in a vertical orientation.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Referring to fig. 1, an autoclave sterilization apparatus includes a sterilization container 1, an air outlet pipeline 2, a controllable valve 3, a filter 4, a filter container 6, a control unit 7, and a first sensor 81; the sterilization container 1 can be externally connected with a steam heat source to form high-pressure steam, or liquid water in the sterilization container 1 is heated by a heating device 5 carried by the sterilization container to generate the high-pressure steam; the filter 4 is a hydrophobic filter and consists of a filter element 41 and an air passage 42, the air passage 42 is arranged on the middle shaft part of the filter element 41, the filtering diameter of the filter element 41 is not more than 0.2um, the filtering efficiency of particles is not less than 99.99 percent, and the filtering diameter of the filter element selected in the implementation is 0.2 um; the filter 4 is arranged in a closed filter container 6, and the filter container 6 can be transversely or vertically arranged outside the sterilization container 1 and is provided with at least one inlet end 61a and one outlet end 62a, in order to quickly realize synchronous sterilization between the filter container 6 and the sterilization container 1, the embodiment discloses that the filter container 6 is provided with one inlet end 61a, one auxiliary inlet end 63a and one outlet end 62a, the filter container 6 is transversely and obliquely arranged outside the sterilization container 1, the inlet end 61a and the outlet end 62a are positioned on one side end face of the filter container 6 which is obliquely downwards, and the auxiliary inlet end 63a is arranged on one side of the filter container 6 which is far away from the inlet end 61 a; the air inlet end 21 of the air outlet pipeline 2 is hermetically connected with the sterilization container 1, the air outlet end 22 of the air outlet pipeline is hermetically connected with the inlet end 61a of the filter container 6, meanwhile, the outlet end 62a of the filter container 6 is hermetically connected with the air passing passage 42 of the filter 4, the outlet end 62a is externally connected with a connecting pipeline 64, and the controllable valve 3 is arranged on the connecting pipeline 64; the inlet end 61a of the filter container 6 has a height greater than the height of the inlet end 21 of the gas outlet pipeline 2, and the inlet end 61a is arranged at the lower position of the filter container 6, so that the liquid substance in the filter container 6 can flow back to the sterilization container 1 through the gas outlet pipeline 2 without any retention.

Meanwhile, the connection relationship ensures that high-pressure steam of the sterilization container 1 enters the filter container 6 through the gas outlet pipeline 2, the gas is filtered by the filtering element 41- > the gas passing path 42- > the outlet end 62 a- > the connecting pipeline 64 of the filter container 6 discharges the gas outwards, the flow path of the gas in the filter container 6 is from outside to inside through the filtering element 41, of course, the gas can also flow from inside to outside through the filtering element 41 if the flow path of the gas in the filter container 6 is from inside to outside, namely, the gas inlet end of the gas outlet pipeline 2 is connected to the gas passing path of the filter, the outlet end of the filter container 6 is arranged outside the filtering element 41, and the gas is filtered by the filtering element 41- > the outlet end of the filter container 6- > the connecting pipeline (not shown in the figure).

The controllable valve 3 can be a valve controlled by an electromagnetic valve, and the electromagnetic valve realizes the opening/closing of the valve by receiving a control instruction sent by the control unit 7, so as to realize the opening/closing of the gas outlet pipeline 2; the first sensor is used for monitoring the temperature in the sterilization container 1, the first sensor is a first temperature sensor 81 which is arranged in the sterilization container 1, the control unit 7 obtains the temperature value in the sterilization container 1 by receiving the first temperature sensor 81, and the heating time T is preset by a program on a timer of the control unit 7 to ensure that the sterilization container 1 and the filter container 6 can synchronously reach the sterilization temperature for sterilization when the sterilization device is in the working state.

As shown in fig. 1, the first sensor may also use a pressure sensor to monitor the temperature inside the sterilization container 1 because the sterilization container 1 is in a saturated steam state, and the pressure value inside the sterilization container 1 has a correlation with the temperature, i.e. the temperature corresponding to the pressure value inside the sterilization container can be calculated by measuring and calculating the pressure value, i.e. the first sensor may be a third pressure sensor 94, which preferably uses a film pressure sensor, and meets the biosafety requirement of the steam sterilizer.

As shown in fig. 2, the position of the connecting line 64 relative to the controllable valve 3 is also connected in parallel with the low-flow exhaust throttling line 15, and the throttling line 15 enables the gas exhausted from the outlet end 62a of the filter container 6 to be exhausted outwards through the throttling line 15 at a low flow rate by adding a needle valve or a throttle valve, so that the reduction of the service life of the controllable valve 3 caused by frequent opening/closing can be avoided; secondly, when the controllable valve 3 is closed, the gas in the filter container 6 can be discharged outwards continuously through the throttling pipeline 15 in a small flow manner, so that the filter container 6 cannot become a blind end, the flow of the gas in the filter container is accelerated, the flow of the gas in the sterilization container 1 can be indirectly influenced, and the temperature distribution in the sterilization container 1 and the filter container 6 is more uniform.

As shown in fig. 3, the outer end of the connecting pipe 64 is further connected to a condensing device 10 and a condensed water collecting container 11, and the gas exhausted from the filter container 6 through the connecting pipe 64 passes through the condensing device 10, the gas portion thereof is exhausted through an exhaust end 101 to the outside, and the liquid portion thereof returns to the condensed water collecting container 11 through a drain end 102.

As shown in fig. 4, on the basis, the exhaust end 101 of the condensing device 10 further externally connects to the exhaust channel 12, a water receiving tray 13 is disposed below the air outlet of the exhaust channel 12, a diversion pipeline 14 is disposed at the bottom of the water receiving tray 13, the other end of the diversion pipeline 14 is communicated with the condensed water collecting container 11, and the liquid water collected to the water receiving tray 13 is returned to the condensed water collecting container 11 through the diversion pipeline 14, so that the gas discharged outwards contains a large amount of water vapor, and the surrounding environment of the sterilizing device is easily wetted.

As shown in fig. 5, the filter container 6 is further added with a second sensor 82 for monitoring the temperature inside the filter container 6, as discussed above, the second sensor 82 can be a second temperature sensor 82 or a fourth pressure sensor 95, the second temperature sensor 82 is disposed at a side close to the inlet end 61a of the filter container 6, and the control unit 7 respectively compares the temperature between the sterilization container 1 and the filter container 6, so as to ensure that the sterilization temperature between the sterilization container 1 and the filter container 6 is synchronously reached when the sterilization apparatus is in an operating state.

To achieve the second object of the present invention, as shown in fig. 6, the present invention adds one of the embodiments for determining whether the filter cartridge 41 is damaged, when the first temperature sensor 81 is disposed in the sterilization container 1 and the second temperature sensor 82 is disposed in the filter container 6, it also adds a differential pressure sensor 93 for monitoring the differential pressure between the input side a and the output side B of the filter cartridge 41, the differential pressure sensor 93 is connected to the control unit 7, and the control unit 7 determines the pressure difference between the input side a and the output side B of the filter cartridge 41 by receiving the value fed back by the differential pressure sensor 93, thereby determining whether the filter cartridge 41 is damaged.

As shown in fig. 7, in another embodiment for determining whether or not the filter cartridge 41 is damaged, when the first temperature sensor 81 is provided in the sterilization vessel 1 and the second temperature sensor 82 is provided in the filter vessel 6, the first pressure sensor 91 is additionally provided on the input side a of the filter cartridge 41 and the second pressure sensor 92 is additionally provided on the output side B of the filter cartridge 41, the first pressure sensor 91 can be provided in the sterilization vessel 1 due to the pressure balance between the filter vessel 6 and the sterilization vessel 1, and the pressure value on the input side a of the filter cartridge 41 can be measured by monitoring the pressure value of the sterilization vessel 1; since the air passage 42 of the output side B of the filter element 41 is communicated with the connection pipe 64, the second pressure sensor 92 can be disposed on the connection pipe 64 for monitoring the pressure value of the output side B of the filter element 42, the control unit 7 can determine the pressure difference between the input side a and the output side B of the filter element 41 by receiving the values fed back by the first pressure sensor 91 and the second pressure sensor 92, so as to determine whether the filter element 41 is damaged, it should be noted that if the pressure sensors are used for monitoring the temperature values in the sterilization container 1 and the filter container 6, as described above, the first pressure sensor 91 and the second pressure sensor 92 do not need to be additionally provided if the pressure sensors are used for monitoring the temperature values in the sterilization container 1 and the filter container 6.

As shown in fig. 8, the present invention also discloses an embodiment of vertically arranging the filter container 6, which is consistent with the above-mentioned embodiment regarding the arrangement of the sensor for monitoring the temperature in the sterilization container 1 and/or the filter container 6 and the arrangement of the sensor for monitoring whether the filter cartridge 41 is broken, whether the condensation device and the condensate water collection container 11 are required to be added and the throttling line is arranged as required, and the main difference is that the inlet end 61b and the outlet end 62b of the filter container 6 are arranged at the bottom of the filter container 6, the auxiliary inlet end 63b is arranged at the side far from the inlet end 61b and is located at the top of the filter container 6, and the steam inlet ends are respectively arranged at the near end and the far end in the filter container 6, so as to facilitate the air flow in the filter container 6 and accelerate the temperature rise thereof, while also enabling a more uniform temperature within its filter vessel 6.

The invention also discloses a sterilization method of the high-pressure steam sterilization device, when the sterilization device only has a first sensor 81 for monitoring the temperature of the sterilization container 1 and the filter containers 6 are arranged in a horizontal row,

s1, placing a substance to be sterilized into the sterilization container 1, closing the cover body of the sterilization container 1 to enable the sterilization container 1 to be a closed cavity, heating water in the container by connecting an external steam heat source or a heating device 5 carried by the sterilization container 1, wherein the sterilization container 1 is in a heating state, the control unit 7 sends a control instruction to open the controllable valve 3, cold air enters the air outlet pipeline 2 through the sterilization container 1, then enters the filter container 6, and then is discharged from the outlet end 62a of the filter container 6 through the air passage 42 of the filter;

s2, the control unit 7 times a time length T3 required by initial temperature rise through a timer to ensure that the sterilization container 1 and the filter container 6 can synchronously reach a preset sterilization temperature;

s3, when the sterilization container 1 and the filter container 6 reach the set sterilization temperature and then enter a sterilization maintenance stage, once the control unit 7 monitors that the temperature of the sterilization container 1 is lower than the threshold value and the supply amount of the original heat source is continuously increased and is not improved, the control unit 7 issues a control instruction to open the controllable valve 3, after the midway heating time period T1, part of gas in the sterilization container 1 or the filter container 6 is exhausted, and then the controllable valve 3 is closed for sterilization; when the control unit 7 monitors that the temperature of the sterilization container 1 or the filter container 6 is higher than the threshold value, the control unit 7 issues a control instruction to stop or reduce the supply amount of the heat source, and if necessary, opens the controllable valve 3 for a time period T2, and then closes the controllable valve 3 to perform sterilization;

and S4, when the sterilization device finishes sterilizing for a long time, closing the heat source in the sterilization container 1, opening the controllable valve 3 by the control unit 7 at the time, and communicating the gas in the sterilization container 1 with the outlet end 62 of the filter container 6 to gradually realize the cooling process and finish the sterilization.

When the sterilization container 1 and the filter container 6 of the sterilization apparatus are respectively provided with the first sensor 81 and the second sensor 82 for monitoring the temperature, the steps 2 and 3 are modified,

s2, the control unit 7 monitors the temperatures of the sterilization container 1 and the filter container 6 in real time to judge whether the temperatures reach the synchronization of the preset sterilization temperature;

s3, the control unit 7 monitors the temperature of the sterilization container 1 and the temperature of the filter container 6 at the same time, and when the control unit 7 monitors that the temperature of the sterilization container 1 or the filter container 6 is lower than the threshold value and the supply amount of the original heat source is continuously increased, the control unit 7 issues a control command to open the controllable valve 3, and after the midway heating time period T1, part of gas in the sterilization container 1 or the filter container 6 is exhausted, and then the controllable valve 3 is closed for sterilization; when the control unit 7 monitors that the temperature of the sterilization container 1 or the filter container 6 is higher than the threshold value, the control unit 7 issues a control command to stop or reduce the supply of the heat source, opens the controllable valve 3 for a time period T2 if necessary, and closes the controllable valve 3 to perform sterilization.

When a pressure sensor or a differential pressure sensor for determining whether or not the filter 4 is broken is added to the sterilization apparatus, step 5 is added:

s5, once the control unit 7 receives the feedback signal of the first pressure sensor 91 and the second pressure sensor 92 or the differential pressure sensor 93 for monitoring whether the filter 4 is damaged, the control unit 7 will issue a control command to close the controllable valve 3, and issue an alarm signal outwards through the original display screen of the sterilization apparatus or the additional indicator light, regardless of the state of the controllable valve 3.

Meanwhile, because the filter 4 is a consumable product and has a certain number of use efficiency, in order to avoid the use in an overdue period, a step of monitoring the use times of the sterilization device can be added on the basis of the steps S1-S4, and once the control unit 7 monitors that the use times exceed the accumulated use times, a prompt signal for replacing the filter 4 is sent out, and the specific steps are as follows:

s6, the control unit 7 will accumulate the sterilization frequency, and once the sterilization frequency reaches a preset value, will send out a prompt signal for replacing the filter 4 through the original display screen or indicator light of the sterilization apparatus.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the terminology used in the description above should not be interpreted as necessarily referring to the same embodiment or example, and the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification can be freely combined and collocated by a person skilled in the art.

Claims (17)

1. A high-pressure steam sterilization device comprises a sterilization container, an air outlet pipeline, a controllable valve and a filter, wherein high-pressure steam is formed in the sterilization container; the air inlet end of the air outlet pipeline is hermetically connected with the sterilization container, and the air outlet end of the air outlet pipeline is communicated with the filter; the controllable valve is used for realizing the opening/closing of the gas outlet pipeline, and is characterized in that: the filter is arranged in a closed filter container, the filter container at least comprises an inlet end and an outlet end, the inlet end is hermetically connected with the air outlet end of the air outlet pipeline, the outlet end is hermetically connected with the air passage of the filter, and the height of the inlet end of the filter container is greater than that of the air inlet end of the air outlet pipeline; the sterilization device also comprises a control unit and a first sensor used for monitoring the temperature in the sterilization container, wherein the control unit obtains the temperature value of the sterilization container by receiving the first sensor and outputs a control instruction to the controllable valve to control the opening/closing of the controllable valve according to a preset trigger condition so as to ensure that the sterilization container and the filter container synchronously reach the sterilization temperature for sterilization when the sterilization device is in a working state.

2. The autoclave sterilization device according to claim 1, wherein: the controllable valve is arranged on a connecting pipeline at the outlet end of the filter container.

3. The autoclave sterilization device according to claim 2, wherein: the position of the connecting pipeline relative to the controllable valve is also connected with a throttling pipeline for low-flow exhaust in parallel.

4. An autoclave apparatus as claimed in claim 2 or 3, wherein: the outer end of the connecting pipeline is also connected with a condensing device and a condensed water collecting container, gas which is discharged outwards from the filter container through the connecting pipeline passes through the condensing device, the gas part of the gas is discharged outwards through the exhaust end to the atmosphere, and the liquid part of the gas returns to the condensed water collecting container through the liquid discharge end.

5. The autoclave sterilization device according to claim 4, wherein: the exhaust end of the condensing device is further externally connected with an exhaust channel, a water receiving tray is arranged below an air outlet of the exhaust channel, a flow guide pipeline is arranged at the bottom of the water receiving tray, the other end of the flow guide pipeline is communicated with a condensed water collecting container, and liquid water collected to the water receiving tray flows back to the condensed water collecting container through the flow guide pipeline.

6. The autoclave sterilization device according to claim 1, wherein: the filter is a hydrophobic filter and consists of a filter element and an air passage, the air passage is arranged on the middle shaft part of the filter element, the filtering diameter of the filter element is not more than 0.2um, and the filtering efficiency of particles is not less than 99.99%; the air entering the filter container is filtered by the filter element and is finally communicated with the outlet end of the filter container through the air passage.

7. The autoclave sterilization device according to claim 6, wherein: the pressure sensor is additionally provided with a sensor for monitoring the change of the pressure difference between the input side A and the output side B of the filter element, the sensor is connected with the control unit, and the control unit judges the pressure difference between the input side A and the output side B of the filter element by receiving the numerical value fed back by the sensor, so that whether the filter element is damaged or not is judged.

8. The autoclave sterilization device according to claim 7, wherein: the sensor can be arranged in a way that a first pressure sensor is additionally arranged on the input side A of the filtering filter element, and a second pressure sensor is additionally arranged on the output side B of the filtering filter element; or a differential pressure sensor is additionally arranged between the input side A and the output side B of the filter element.

9. The autoclave sterilization device according to claim 1, wherein: the filter container is transversely obliquely arranged on the outer side of the sterilization container, and the inlet end is positioned on the end face of one side of the filter container, which is obliquely downwards.

10. The autoclave sterilization device according to claim 1, wherein: the filter container is vertically arranged outside the sterilizing container, and the inlet end is positioned on the bottom end face of the filter container.

11. An autoclave apparatus as claimed in claim 1, 9 or 10, wherein: the filter container is additionally provided with at least one auxiliary inlet end on one side far away from the inlet end, and the auxiliary inlet end is connected with a steam heat source in the sterilization container through a new gas outlet pipeline which is connected by side, or is connected with a branch pipeline on the original gas outlet pipeline.

12. The autoclave sterilization device according to claim 1, wherein: the first sensor for monitoring the temperature in the sterilization container is a first temperature sensor or a third pressure sensor, and the control unit ensures that the sterilization container and the filter container synchronously reach the sterilization temperature when the sterilization device is in the working state through the preset heating time T.

13. The autoclave sterilization device according to claim 1, wherein: the sterilization device is characterized in that a second sensor used for monitoring the temperature in the filter container is additionally arranged, the second sensor is a second temperature sensor or a fourth pressure sensor, and the control unit respectively compares the temperature between the sterilization container and the filter container so as to ensure that the sterilization container and the filter container synchronously reach the sterilization temperature when the sterilization device is in the working state.

14. A sterilization method of a high-pressure steam sterilization device is characterized in that:

s1, placing a substance to be sterilized into a sterilization container, closing a cover body of the sterilization container to enable the sterilization container to be a sealed cavity, heating water in the container by connecting an external steam heat source or a heating device carried by the sterilization container, wherein the sterilization container is in a heating state, a control unit issues a control instruction at the moment, a controllable valve is opened, cold air enters an air outlet pipeline through the sterilization container at the moment, then enters a filter container, and is discharged from an outlet end of the filter container through an air passing passage of the filter;

s2, when the temperature of the sterilization container is raised to the preset sterilization temperature and the temperature of the filter container is synchronous with that of the sterilization container, the control unit closes the controllable valve, and the time point is taken as the starting time point for calculating the sterilization time length;

s3, when the sterilization maintaining stage is started after the set sterilization temperature is reached, once the control unit monitors that the temperature of the sterilization container or the filter container is lower than the threshold value and the supply quantity of the original heat source is continuously increased and is not improved, the control unit issues a control instruction to open the controllable valve, after the midway heating time period T1, part of gas in the sterilization container or the filter container is exhausted, and then the controllable valve is closed to perform sterilization; when the control unit monitors that the temperature of the sterilization container or the filter container is higher than a threshold value, the control unit issues a control instruction, stops or reduces the supply amount of the heat source, opens the controllable valve for a time period T2 if necessary, and closes the controllable valve for sterilization;

and S4, when the sterilization device finishes sterilization for a long time, closing the heat source in the sterilization container, opening the controllable valve by the control unit, and communicating the gas in the sterilization container with the outlet end of the filter container to gradually realize the cooling process and finish sterilization.

15. The sterilization method of an autoclave sterilization apparatus according to claim 14, wherein: it also comprises the following steps of,

s5, once the control unit receives the signals fed back by the first pressure sensor and the second pressure sensor or the differential pressure sensor for monitoring whether the filter is damaged, the control unit sends a control instruction to close the controllable valve and sends an alarm signal outwards through the original display screen of the sterilization device or the additionally arranged indicator lamp no matter the controllable valve is in any state.

16. The sterilization method of an autoclave sterilization apparatus according to claim 14, wherein:

s2, when the sterilization device only has a first sensor for monitoring the temperature of the sterilization container, the control unit times the time length T3 required by the initial temperature rise through a timer, so as to ensure that the sterilization container and the filter container can synchronously reach the preset sterilization temperature;

when the sterilization device is respectively provided with a first sensor for monitoring the temperature of the sterilization container and a second sensor for monitoring the temperature of the filter container, the control unit monitors the temperatures of the sterilization container and the filter container in real time to judge whether the sterilization container and the filter container reach the synchronization of the preset sterilization temperature.

17. The sterilization method of an autoclave sterilization apparatus according to claim 14, wherein: it also comprises the following steps of,

s6, the control unit will accumulate the sterilization times, once reaching the preset value, will send out the prompt signal of changing the filter through the original display screen or pilot lamp of the sterilization device.

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