Hydrogen peroxide sterilization method

Abstract

The invention discloses a hydrogen peroxide sterilization method which comprises the following steps: calculating the actual flow of a delivery pump according to the actual consumption of hydrogen peroxide obtained by weighing in a container in unit time; according to the ratio of the actual rotating speed to the actual flow of the conveying pump, the actual slope K1 of the rotating speed-flow curve of the conveying pump is obtained; obtaining a target flow according to the ratio of the set target consumption to the set target time of the hydrogen peroxide; according to the difference value between the set target consumption and the actual consumption of the hydrogen peroxide, obtaining the target consumption which is lacked currently; deviation flow is obtained according to the ratio of the lacked target consumption to the remaining target time; summing the target flow and the deviation flow to obtain corrected flow; the corrected rotating speed of the conveying pump is obtained according to the ratio of the corrected flow to the actual slope K1; according to the ratio of the corrected flow to the corrected rotating speed, the corrected slope K2 of the corrected rotating speed-flow curve of the conveying pump is obtained. The hydrogen peroxide sterilization method can be repeatedly carried out, and the injection accuracy and stability can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of food and medicine packaging machinery and equipment, and in particular to a hydrogen peroxide sterilization method. Background Art

[0002] Existing isolator VHP biological purification schemes, such as a sterilization system, sterilization method and isolator for isolators with application number 201910645927.3, a sterilization system for isolators, including a supply pipe, a container for holding sterilized substances, a delivery pump, a weighing component and an evaporation component located in the isolator cavity, one end of the supply pipe extends into the container, and the other end extends into the evaporation component, the delivery pump is located on the supply pipe, and is used to transport the sterilized substances in the container through the supply pipe to the evaporation component at a preset speed to vaporize the sterilized substances; the weighing component is used to weigh the container in real time to determine whether the sterilized substances have reached the predetermined consumption; a concentration detection component is provided in the cavity for detecting the concentration of the sterilized substances; a sterilization method for isolators, comprising four stages: a dehumidification stage, an elevation stage, a maintenance stage, and a residual discharge stage; after the biological purification is completed, the isolator production stage is entered to provide a Class A sterile environment for the production of drugs. Dehumidification stage: compressed air is injected into the cavity to replace and dehumidify the air in the cavity; lifting stage: the delivery pump delivers the sterilized substance in the container to the evaporation component for vaporization at a preset speed, and the weighing component weighs the container in real time to determine whether the sterilized substance has reached the preset consumption; and the concentration detection component detects the concentration of the sterilized substance in the cavity to determine whether the sterilized substance in the cavity is within the preset threshold; maintenance stage: reduce the speed of the delivery pump, circulate the air in the cavity, and maintain the preset time; residual discharge stage: stop the rotation of the delivery pump and replace and dehumidify the air in the cavity.

[0003] In the existing sterilization system for isolators, one end of the supply pipe extends into the container and the other end extends into the evaporation component. The delivery pump is located on the supply pipe. During the dehumidification stage, the delivery pump runs stationary, and during the lifting stage, the delivery pump starts to deliver hydrogen peroxide to the supply pipe. The overall sterilization speed is slow.

[0004] The VHP disinfection effect is a comprehensive influence of the concentration of hydrogen peroxide solution, vaporization state, amount of hydrogen peroxide solution, target environmental temperature conditions, state temperature materials, etc. The amount of hydrogen peroxide is a more reliable and controllable parameter in the sterilization process. The existing sterilization methods for isolators have the following problems in the entire process:

[0005] The theoretical consumption of each VHP is the same in the "boosting stage" and "maintaining stage" with a constant delivery pump speed and constant injection time. However, as the delivery pump is squeezed, the cross-section of the supply pipe (hose) becomes elliptical. The flow rate of the elliptical pipe decays faster at the beginning and gradually slows down later, resulting in changes in the flow rate of hydrogen peroxide consumption at the same delivery pump speed and time, resulting in poor accuracy and stability of the injection rate of hydrogen peroxide within a fixed time.

[0006] The amount of hydrogen peroxide injected during the "boost stage" and "maintenance stage" will have a crucial impact on the sterilization effect and is a key factor in achieving a log6 kill effect of microorganisms. In addition, since compressed air is constantly replacing the air during the boost stage and the maintenance stage, injecting hydrogen peroxide at the same rate for the same time is a factor in stabilizing the VHP effect. If the injection rate of hydrogen peroxide solution changes significantly, it will greatly affect the gasification effect. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a hydrogen peroxide sterilization method which is repeatable, low-cost and can improve the accuracy and stability of hydrogen peroxide injection into a sterilization device.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A hydrogen peroxide sterilization method is performed using a hydrogen peroxide sterilization system. The hydrogen peroxide sterilization system includes a container for containing hydrogen peroxide, a delivery pump, and a sterilization device. The delivery pump is used to deliver the hydrogen peroxide in the container to the sterilization device. The hydrogen peroxide sterilization method includes step a: correcting the speed-flow curve of the delivery pump:

[0010] The actual flow rate of the delivery pump is calculated based on the actual consumption of hydrogen peroxide weighed in the container per unit time;

[0011] The actual slope K1 of the speed-flow curve of the delivery pump is obtained according to the ratio of the actual speed and the actual flow of the delivery pump;

[0012] The target flow rate is obtained according to the ratio of the set target consumption of hydrogen peroxide to the set target time;

[0013] The current missing target consumption is obtained according to the difference between the set target consumption of hydrogen peroxide and the actual consumption;

[0014] The deviation flow is obtained according to the ratio of the missing target consumption and the remaining target time;

[0015] The corrected flow rate is obtained by summing the target flow rate and the deviation flow rate;

[0016] The corrected speed of the delivery pump is obtained according to the ratio of the corrected flow rate to the actual slope K1;

[0017] The correction slope K2 of the correction speed-flow curve of the delivery pump is obtained according to the ratio of the correction flow rate to the correction speed;

[0018] The delivery pump operates according to a speed-flow curve with a slope of K2.

[0019] As a further improvement of the above technical solution:

[0020] The hydrogen peroxide sterilization system also includes a supply pipeline and a weighing device. The sterilization equipment includes an isolator and an evaporation device located in the isolator. One end of the supply pipeline is connected to the container, and the other end passes through the outer wall of the isolator and extends to the evaporation device. The delivery pump is arranged on the supply pipeline, and the container is arranged on the weighing device. A flow detection mechanism is provided on the supply pipeline, and a blowing mechanism is provided on the end of the supply pipeline extending to the evaporation device.

[0021] The method comprises step S1, a dehumidification stage: the blowing mechanism is turned on, the delivery pump adopts a first speed to deliver hydrogen peroxide liquid from the container to the evaporation device, and when the flow detection mechanism detects the flow, the delivery pump is stopped; and the first speed is used as the actual speed of the delivery pump to perform step a.

[0022] The method further includes step S2, a lifting stage: the delivery pump delivers the hydrogen peroxide in the container to the evaporation device for gasification at the corrected speed of the dehumidification stage; the previously modified speed is used as the actual speed of the delivery pump and the corrected slope K2 of the previously corrected speed-flow curve is used as the actual slope K1, and step a is repeated until the weighing device weighs the container and determines that the consumption of hydrogen peroxide meets the standard.

[0023] The method further includes step S3, a maintenance phase: the delivery pump delivers the hydrogen peroxide in the container to the evaporation device for gasification at the last corrected speed in the lifting phase; the previously modified speed is used as the actual speed of the delivery pump and the corrected slope K2 of the previously corrected speed-flow curve is used as the actual slope K1, and step a is repeated until the weighing device weighs the container to determine that the total consumption of hydrogen peroxide meets the standard.

[0024] The method further includes step S4, a residual discharge stage: the delivery pump is reversed to recover the hydrogen peroxide in the supply pipeline to the container, and stops when the weighing device detects no change in the weight.

[0025] The flow detection mechanism is located above the isolator and close to the position where the supply pipeline passes through the isolator, and the container is lower than the evaporation device.

[0026] The blowing mechanism includes an air blowing head, an air pipe and an air valve. The air blowing head is aligned with one end of the supply pipeline extending to the evaporation device. One end of the air pipe is connected to the air blowing head and the other end is used to connect to the air supply component. The air valve is arranged on the air pipe.

[0027] The flow detection mechanism includes a tube clamp type flow sensor clamped on the supply pipeline.

[0028] Compared with the prior art, the advantages of the present invention are:

[0029] The hydrogen peroxide sterilization method of the present invention comprises correcting the speed-flow curve of the delivery pump. During operation, the speed-flow curve of the delivery pump can be corrected after setting a target time, so that the delivery pump operates according to the speed-flow curve with a slope of K2 (corrected slope). On the first hand, the accuracy and stability of the injection rate of hydrogen peroxide within a fixed time are improved relative to the constant speed of the delivery pump and other existing methods; on the second hand, the speed of the delivery pump is adjusted by correcting the speed-flow curve of the delivery pump, and there is no need to increase the equipment cost, so the cost is low; on the third hand, the speed-flow curve of the delivery pump can be corrected at a required stage, and the speed-flow curve of the delivery pump can be repeatedly corrected at each stage, so as to further improve the accuracy and stability of the injection of hydrogen peroxide into the sterilization equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flow chart of the hydrogen peroxide sterilization method of the present invention.

[0031] Figure 2 It is a structural schematic diagram of a hydrogen peroxide sterilization system of the hydrogen peroxide sterilization method of the present invention.

[0032] Figure 3 It is a speed-flow curve diagram of the delivery pump in the hydrogen peroxide sterilization method of the present invention.

[0033] Figure 4 It is a flow chart of another embodiment of the hydrogen peroxide sterilization method of the present invention.

[0034] The symbols in the figure represent:

[0035] 1. Supply pipeline; 2. Container; 3. Delivery pump; 4. Weighing device; 5. Isolator; 6. Evaporation device; 7. Flow detection mechanism; 8. Blowing mechanism; 81. Air blowing head; 82. Air pipe; 83. Air valve. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment 1:

[0041] Figure 1 An embodiment of the hydrogen peroxide sterilization method of the present invention is shown. The hydrogen peroxide sterilization method of this embodiment adopts Figure 2 The hydrogen peroxide sterilization system shown in the figure is carried out, the hydrogen peroxide sterilization system includes a container 2 for containing hydrogen peroxide, a delivery pump 3 and a sterilization device, the delivery pump 3 is used to deliver the hydrogen peroxide in the container 2 to the sterilization device, and the hydrogen peroxide sterilization method includes step a: correcting the speed-flow curve of the delivery pump 3:

[0042] The actual flow rate of the delivery pump 3 is calculated based on the actual consumption of hydrogen peroxide weighed in the container 2 per unit time;

[0043] The actual slope K1 of the speed-flow curve of the delivery pump 3 is obtained according to the ratio of the actual speed and the actual flow of the delivery pump 3;

[0044] The target flow rate is obtained according to the ratio of the set target consumption of hydrogen peroxide to the set target time;

[0045] The current missing target consumption is obtained according to the difference between the set target consumption of hydrogen peroxide and the actual consumption;

[0046] The deviation flow is obtained according to the ratio of the missing target consumption and the remaining target time;

[0047] The corrected flow rate is obtained by summing the target flow rate and the deviation flow rate;

[0048] The corrected speed of the delivery pump 3 is obtained according to the ratio of the corrected flow rate to the actual slope K1;

[0049] The correction slope K2 of the correction speed-flow curve of the delivery pump 3 is obtained according to the ratio of the correction flow rate to the correction speed;

[0050] The delivery pump 3 operates according to a rotation speed-flow rate curve having a slope K2.

[0051] The hydrogen peroxide sterilization method includes correcting the speed-flow curve of the delivery pump 3. During operation, the speed-flow curve of the delivery pump 3 can be corrected after setting the target time, so that the delivery pump 3 can operate according to the speed-flow curve with a slope of K2 (corrected slope). On the first hand, the relative constant speed of the delivery pump 3 and other existing methods improve the accuracy and stability of the injection rate of hydrogen peroxide within a fixed time; on the second hand, the speed of the delivery pump 3 is adjusted by correcting the speed-flow curve of the delivery pump 3, and there is no need to increase the equipment cost, so the cost is low; on the third hand, the speed-flow curve of the delivery pump 3 can be corrected at the required stage, and the speed-flow curve of the delivery pump 3 can be repeatedly corrected in each stage, so as to further improve the accuracy and stability of the injection of hydrogen peroxide into the sterilization equipment.

[0052] Furthermore, in this embodiment, if Figure 2 As shown, the hydrogen peroxide sterilization system also includes a supply pipeline 1 and a weighing device 4, the sterilization equipment includes an isolator 5 and an evaporation device 6 located in the isolator 5, one end of the supply pipeline 1 is connected to the container 2, and the other end passes through the outer wall of the isolator 5 and extends to the evaporation device 6, the delivery pump 3 is arranged on the supply pipeline 1, the container 2 is arranged on the weighing device 4, a flow detection mechanism 7 is arranged on the supply pipeline 1, and a blowing mechanism 8 is arranged at one end of the supply pipeline 1 extending to the evaporation device 6. Specifically, the flow detection mechanism 7 is arranged at one end of the supply pipeline 1 close to the evaporation device 6. During the sterilization process in which the delivery pump 3 delivers hydrogen peroxide, the blowing mechanism 8 is turned on, which is conducive to the gasification of hydrogen peroxide and improves the sterilization effect.

[0053] Furthermore, in this embodiment, step S1 is included, a dehumidification stage: the blowing mechanism 8 is turned on, the delivery pump 3 adopts a first speed to deliver the hydrogen peroxide liquid from the container 2 to the evaporation device 6, and when the flow detection mechanism 7 detects the flow rate, the delivery pump 3 is stopped; the first speed is used as the actual speed of the delivery pump 3, and step a is performed.

[0054] In the dehumidification stage, when the flow detection mechanism 7 detects the flow rate, the delivery pump 3 is stopped to fill the supply pipeline 1 with hydrogen peroxide liquid in advance, thereby reducing the time for filling the supply pipeline 1 with hydrogen peroxide liquid in the subsequent stage, thereby improving work efficiency.

[0055] Furthermore, in this embodiment, step S2 is also included, the lifting stage: the delivery pump 3 delivers the hydrogen peroxide in the container 2 to the evaporation device 6 for gasification according to the modified speed in the dehumidification stage; the previous modified speed is used as the actual speed of the delivery pump 3 and the modified slope K2 of the previous modified speed-flow curve is used as the actual slope K1, and step a is repeated until the weighing device 4 weighs the container 2 to determine that the consumption of hydrogen peroxide meets the standard. In the lifting stage, step a is repeated to improve the accuracy and stability of the injection of hydrogen peroxide into the sterilization equipment in the lifting stage.

[0056] Furthermore, in this embodiment, step S3, a maintenance phase is also included: the delivery pump 3 delivers the hydrogen peroxide in the container 2 to the evaporation device 6 for gasification at the last modified speed in the lifting phase; the last modified speed is used as the actual speed of the delivery pump 3 and the modified slope K2 of the last correction curve is used as the actual slope K1, and step a is repeated until the weighing device 4 weighs the container 2 and determines that the total consumption of hydrogen peroxide meets the standard. In the maintenance phase, step a is repeated to improve the accuracy and stability of the injection of hydrogen peroxide into the sterilization equipment in the maintenance phase.

[0057] Furthermore, in this embodiment, step S4, a residual discharge stage, is also included: the delivery pump 3 is reversed to recover the hydrogen peroxide in the supply pipeline 1 to the container 2, and the process stops when the weighing device 4 weighs and detects that there is no change in the weight. In the residual discharge stage, the hydrogen peroxide liquid in the supply pipeline 1 is recovered by reversing the delivery pump 3, so as to reduce the residual liquid in the supply pipeline 1 and avoid errors in the next sterilization work.

[0058] Further, in this embodiment, the flow detection mechanism 7 is located above the isolator 5 and close to the position where the supply pipeline 1 passes through the isolator 5, and the container 2 is lower than the evaporation device 6. The flow detection mechanism 7 is located above the isolator 5 and close to the position where the supply pipeline 1 passes through the isolator 5, which is conducive to filling the supply pipeline 1 with hydrogen peroxide liquid when the flow detection mechanism 7 detects the flow during the dehumidification stage. The container 2 is lower than the evaporation device 6, which is conducive to draining the hydrogen peroxide liquid in the supply pipeline 1 during the residual discharge stage.

[0059] Furthermore, in this embodiment, the blowing mechanism 8 includes an air blowing head 81, an air pipe 82 and an air valve 83. The air blowing head 81 is aligned with one end of the supply pipeline 1 extending to the evaporation device 6. One end of the air pipe 82 is connected to the air blowing head 81, and the other end is used to connect to the air supply component. The air valve 83 is arranged on the air pipe 82. When the delivery pump 3 starts to deliver the hydrogen peroxide liquid, the air valve 83 opens, and the air supply component supplies air to the air blowing head 81 through the air pipe 82, and the air blowing head 81 blows away the hydrogen peroxide liquid flowing out of the liquid outlet end of the supply pipeline 1.

[0060] Furthermore, in this embodiment, the flow detection mechanism 7 includes a clamp-type flow sensor clamped on the supply pipeline 1. The clamp-type flow sensor can detect the flow of the supply pipeline 1 and also act as a switch valve for the supply pipeline 1.

[0061] Further, in this embodiment, the delivery pump 3 can be a peristaltic pump, a plunger pump, etc., and the speed-flow curve is as follows: Figure 3 Pump body with linear relationship shown.

[0062] Embodiment 2:

[0063] Figure 4 Another embodiment of the hydrogen peroxide sterilization method of the present invention is shown. The hydrogen peroxide sterilization method of this embodiment is performed using the hydrogen peroxide sterilization system of the first embodiment, and includes step a: correcting the speed-flow curve of the delivery pump 3:

[0064] The actual flow rate of the delivery pump 3 is calculated based on the actual consumption of hydrogen peroxide weighed in the container 2 per unit time;

[0065] The actual slope K1 of the speed-flow curve of the delivery pump 3 is obtained according to the ratio of the actual speed and the actual flow of the delivery pump 3;

[0066] The target flow rate is obtained according to the ratio of the set target consumption of hydrogen peroxide to the set target time;

[0067] The current missing target consumption is obtained according to the difference between the set target consumption of hydrogen peroxide and the actual consumption;

[0068] The deviation flow is obtained according to the ratio of the missing target consumption and the remaining target time;

[0069] The corrected flow rate is obtained by summing the target flow rate and the deviation flow rate;

[0070] The corrected speed of the delivery pump 3 is obtained according to the ratio of the corrected flow rate to the actual slope K1;

[0071] The correction slope K2 of the correction speed-flow curve of the delivery pump 3 is obtained according to the ratio of the correction flow rate to the correction speed;

[0072] The delivery pump 3 operates according to a rotation speed-flow rate curve having a slope K2.

[0073] The speed-flow curve of the delivery pump 3, the linear function correspondence curve of the speed and flow is very close to a straight line. In this case, the actual injection rate value can often correspond to the actual transmission flow rate; by correcting the speed-flow curve, the speed-flow curve can be reused.

[0074] The control of the hydrogen peroxide injection system during the entire VHP stage is as follows:

[0075] “Dehumidification phase”:

[0076] In the first step, in the "dehumidification stage", the hydrogen peroxide liquid is transported from the container 2 to the evaporation device 6 by the delivery pump 3 at a first speed, and when the flow detection mechanism 7 detects that the liquid in the supply pipeline 1 is stable, the delivery pump 3 is stopped;

[0077] The second step is to calculate the injection time of hydrogen peroxide and the consumption through the weighing device 4 under the container 2 according to the first speed in the dehumidification stage, and to correct the speed-flow curve of the delivery pump 3 to improve the injection rate accuracy of hydrogen peroxide in the "boosting stage";

[0078] "Progression Phase":

[0079] The third step is to obtain the target consumption and target time set in the "boosting stage" to obtain the target flow rate, and obtain the second speed through the speed-flow curve corrected by the delivery pump 3;

[0080] Step 4: When the delivery pump 3 runs for 5 minutes, the current target consumption (deviation consumption) is calculated; based on the 5-minute consumption and the speed, the speed-flow curve of the delivery pump 3 is corrected;

[0081] Step 5: According to the target flow rate and the corrected speed-flow curve of the delivery pump 3, a corrected speed (corrected speed) is obtained; then the currently missing target consumption is evenly distributed to the speed that should be supplemented in the remaining time, and the third speed is obtained by accumulating the corrected speed, and the fourth step to the fifth step are repeated repeatedly;

[0082] Step 6: When the "promotion phase" time is reached, enter the "maintenance phase"

[0083] “Maintenance Phase”

[0084] Step 7, obtaining the set target consumption and set target time of the "maintenance phase", and obtaining the fourth speed through the corrected "speed-flow curve of the delivery pump 3";

[0085] Step 8: When the delivery pump 3 runs for 5 minutes, the current target consumption is calculated;

[0086] Step 9, based on the 5-minute consumption and the speed, correct the speed-flow curve of the delivery pump 3;

[0087] Step 10: According to the target flow rate and the corrected speed-flow rate curve of the delivery pump 3, a corrected speed (corrected speed) is obtained; then the currently missing target consumption is evenly distributed to the speed that should be supplemented in the remaining time, and the fifth speed is obtained by accumulating the corrected speed, and steps 8 to 10 are repeated repeatedly;

[0088] Step 11: When the "maintenance phase" time is up, enter the "residue elimination phase";

[0089] "Residue elimination phase":

[0090] In the twelfth step, the delivery pump 3 is reversed to recover the liquid in the supply pipeline 1 to the container 2, and stops when the weighing device 4 detects that the weight does not change;

[0091] In the thirteenth step, the injection distribution system is finished and the speed-flow curve of the delivery pump 3 is corrected; when the delivery pump 3 is running again, the speed will be calculated based on the set flow and the latest speed-flow curve of the delivery pump 3.

[0092] The speed-flow curve of the delivery pump 3 is corrected and used as follows:

[0093] The speed-flow curve correction method of delivery pump 3 is as follows:

[0094] 1. Actual flow g / Min = actual consumption g / actual time Min

[0095] 2. The actual slope K1 of the speed-flow curve of the delivery pump 3 (actual consumption per revolution per minute g / min*rpm) = actual flow g / Min / actual speed rpm; (g / min*rpm represents the slope of the linear function of the "speed-flow curve of the delivery pump 3").

[0096] The method to correct the speed is as follows:

[0097] 1. Target flow rate g / min = set target consumption g / set target time min;

[0098] 2. Deviation flow g / min = current missing target consumption g / remaining target time min;

[0099] 3. Corrected flow rate g / min = target flow rate g / min + deviation flow rate g / min;

[0100] 4. Corrected rotation speed rpm = corrected flow rate g / min / actual slope K1 of the rotation speed-flow rate curve of the delivery pump 3 .

[0101] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A hydrogen peroxide sterilization method, characterized in that: A hydrogen peroxide sterilization system is used, the hydrogen peroxide sterilization system comprising a container (2) for containing hydrogen peroxide, a delivery pump (3) and a sterilization device, the delivery pump (3) being used to deliver the hydrogen peroxide in the container (2) to the sterilization device, the hydrogen peroxide sterilization method comprising step a: correcting the speed-flow curve of the delivery pump (3): The actual flow rate of the delivery pump (3) is calculated based on the actual consumption of hydrogen peroxide weighed in the container (2) per unit time; The actual slope K1 of the speed-flow curve of the delivery pump (3) is obtained according to the ratio of the actual speed of the delivery pump (3) to the actual flow rate; The target flow rate is obtained according to the ratio of the set target consumption of hydrogen peroxide to the set target time; The current missing target consumption is obtained according to the difference between the set target consumption of hydrogen peroxide and the actual consumption; The deviation flow is obtained according to the ratio of the missing target consumption and the remaining target time; The corrected flow rate is obtained by summing the target flow rate and the deviation flow rate; The corrected speed of the delivery pump (3) is obtained according to the ratio of the corrected flow rate to the actual slope K1; A correction slope K2 of a correction speed-flow curve of the delivery pump (3) is obtained according to a ratio of the correction flow rate to the correction speed; The delivery pump (3) operates according to a speed-flow curve having a slope K2.

2. The hydrogen peroxide sterilization method according to claim 1, characterized in that: The hydrogen peroxide sterilization system further comprises a supply pipeline (1) and a weighing device (4); the sterilization equipment comprises an isolator (5) and an evaporation device (6) located in the isolator (5); one end of the supply pipeline (1) is connected to the container (2), and the other end passes through the outer wall of the isolator (5) and extends to the evaporation device (6); the delivery pump (3) is arranged on the supply pipeline (1); the container (2) is arranged on the weighing device (4); a flow detection mechanism (7) is arranged on the supply pipeline (1); and a blowing mechanism (8) is arranged at one end of the supply pipeline (1) extending to the evaporation device (6).

3. The hydrogen peroxide sterilization method according to claim 2, characterized in that: The method comprises step S1, a dehumidification stage: the blowing mechanism (8) is turned on, the delivery pump (3) adopts a first rotation speed to deliver hydrogen peroxide liquid from the container (2) to the evaporation device (6), and when the flow detection mechanism (7) detects the flow, the delivery pump (3) is stopped; and step a is performed with the first rotation speed as the actual rotation speed of the delivery pump (3).

4. The hydrogen peroxide sterilization method according to claim 3, characterized in that: The method further comprises step S2, a lifting stage: the delivery pump (3) delivers the hydrogen peroxide in the container (2) to the evaporation device (6) for gasification at the corrected speed of the dehumidification stage; the previously modified speed is used as the actual speed of the delivery pump (3) and the corrected slope K2 of the previously corrected speed-flow curve is used as the actual slope K1, and step a is repeated until the weighing device (4) weighs the container (2) to determine that the consumption of hydrogen peroxide meets the standard.

5. The hydrogen peroxide sterilization method according to claim 4, characterized in that: The method further comprises step S3, a maintenance phase: the delivery pump (3) delivers the hydrogen peroxide in the container (2) to the evaporation device (6) for gasification at the last corrected speed in the lifting phase; the previously modified speed is used as the actual speed of the delivery pump (3) and the corrected slope K2 of the previously corrected speed-flow curve is used as the actual slope K1, and step a is repeated until the weighing device (4) weighs the container (2) and determines that the total consumption of hydrogen peroxide meets the standard.

6. The hydrogen peroxide sterilization method according to claim 5, characterized in that: The method further comprises step S4, a residual discharge stage: the delivery pump (3) is reversed to recover the hydrogen peroxide in the supply pipeline (1) to the container (2), and the process stops when the weighing device (4) detects no change in the weight.

7. The hydrogen peroxide sterilization method according to claim 2, characterized in that: The flow detection mechanism (7) is located above the isolator (5) and close to the position where the supply pipeline (1) passes through the isolator (5), and the container (2) is lower than the evaporation device (6).

8. The hydrogen peroxide sterilization method according to claim 2, characterized in that: The blowing mechanism (8) comprises an air blowing head (81), an air pipe (82) and an air valve (83); the air blowing head (81) is arranged to be aligned with one end of the supply pipeline (1) extending to the evaporation device (6); one end of the air pipe (82) is connected to the air blowing head (81) and the other end is used to be connected to the air supply component; the air valve (83) is arranged on the air pipe (82).

9. The hydrogen peroxide sterilization method according to any one of claims 2 to 8, characterized in that: The flow detection mechanism (7) comprises a tube clamp type flow sensor clamped on the supply pipeline (1).

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