A rapid residual removal VHP sterilization system

Abstract

The application discloses a VHP sterilization system capable of quickly discharging residual substances, which comprises a sterilization cabin, an air supply assembly, an air exhaust assembly and a sterilization assembly. The air supply assembly comprises an air supply pipeline and an air supply high-efficiency filter, and the air supply pipeline is communicated with the inside of the sterilization cabin. The air exhaust assembly comprises an air exhaust pipeline and an air exhaust high-efficiency filter, and the air exhaust pipeline is communicated with the inside of the sterilization cabin. The sterilization assembly comprises a flash generator, a first pipeline and a sterilization high-efficiency filter. One end of the first pipeline is communicated with the flash generator, and the other end of the first pipeline is communicated with the inside of the sterilization cabin. The VHP sterilization system provided by the application filters hydrogen peroxide vaporized by the flash generator by using a separate sterilization high-efficiency filter, thereby ensuring the sterile filtration of sterilization gas. Meanwhile, the sterilization high-efficiency filter is not arranged on the air supply pipeline, thereby solving the problem that residual hydrogen peroxide on the sterilization high-efficiency filter causes the increase of the discharging time when the air supply assembly works to discharge residual substances from the sterilization cabin.

Description

Technical Field

[0001] This application relates to the field of VHP sterilization technology, and more specifically to a VHP sterilization system for rapid residue removal. Background Technology

[0002] Vaporized hydrogen peroxide (VHP) sterilization utilizes the fact that hydrogen peroxide in its gaseous state is more effective at killing bacterial spores than in its liquid state at room temperature, thus achieving complete sterilization. In traditional VHP sterilization systems, a flash generator is installed on the air supply duct, and a high-efficiency particulate air (HEPA) filter installed on the duct filters the vaporized hydrogen peroxide. While this allows the HEPA filter to filter both vaporized hydrogen peroxide during sterilization and the airflow entering the sterilization chamber during residual removal, this structure has a drawback. A large amount of hydrogen peroxide remains in the HEPA filter during sterilization, and during residual removal, the filter slowly releases it, resulting in persistent hydrogen peroxide residue in the sterilization chamber. This increases the residual removal time and also affects the lifespan of the HEPA filter. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this application is to provide a VHP sterilization system with rapid residue removal, thereby effectively solving the above-mentioned technical problems.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] This application provides a rapid residue removal VHP sterilization system, comprising:

[0006] Sterilization chamber

[0007] An air supply assembly includes an air supply duct and an HEPA filter. The air supply duct connects to the interior of the sterilization chamber, and the HEPA filter is installed on the air supply duct to filter the airflow entering the sterilization chamber from the air supply duct.

[0008] An exhaust system includes an exhaust duct and an exhaust HEPA filter. The exhaust duct connects to the interior of the sterilization chamber, and the exhaust HEPA filter is installed on the exhaust duct to filter the airflow exiting the sterilization chamber from the exhaust duct.

[0009] The sterilization assembly includes a flash evaporator, a first pipe, and a sterilization high-efficiency filter. The flash evaporator is used to vaporize hydrogen peroxide solution. One end of the first pipe is connected to the flash evaporator, and the other end of the first pipe is connected to the interior of the sterilization chamber. The sterilization high-efficiency filter is installed on the first pipe to filter the vaporized hydrogen peroxide sent into the sterilization chamber from the first pipe.

[0010] Furthermore, the sterilization assembly includes a second pipe and an internal circulation fan. One end of the second pipe is connected to the interior of the sterilization chamber, and the other end of the second pipe is connected to the flash evaporator. The internal circulation fan is installed on the second pipe to discharge vaporized hydrogen peroxide from the sterilization chamber to the flash evaporator.

[0011] Furthermore, the sterilization assembly includes a third pipe and a catalyst supply device. The catalyst supply device is disposed on the third pipe. One end of the third pipe is connected to a first pipe between the high-efficiency filter and the sterilization chamber, and the other end of the third pipe is connected to a second pipe between the internal circulation fan and the sterilization chamber.

[0012] Furthermore, a first catalytic decomposition butterfly valve is provided on the third pipeline between the catalyst supply device and the first pipeline, and a second catalytic decomposition butterfly valve is provided on the third pipeline between the catalyst supply device and the second pipeline.

[0013] Furthermore, a first internal circulation butterfly valve is provided on the first pipe between the sterilization high-efficiency filter and the sterilization chamber, and the first internal circulation butterfly valve is close to the sterilization chamber; a second internal circulation butterfly valve is provided on the second pipe between the internal circulation fan and the sterilization chamber, and the second internal circulation butterfly valve is close to the sterilization chamber.

[0014] Furthermore, an air supply butterfly valve is installed on the air supply duct between the air supply fan and the air supply high-efficiency filter.

[0015] Furthermore, an exhaust butterfly valve is installed on the exhaust duct between the exhaust high-efficiency filter and the sterilization chamber, and a pressure relief pipe is connected in parallel to the location on the exhaust duct where the exhaust butterfly valve is installed, and a pressure relief butterfly valve is installed on the pressure relief pipe.

[0016] Furthermore, the air supply duct is connected to the top of the sterilization chamber, and the exhaust duct is connected to the bottom of the sterilization chamber.

[0017] Furthermore, the first pipe is connected to the upper part of the sterilization chamber, and the second pipe is connected to the lower part of the sterilization chamber. Beneficial effects

[0018] This application provides a rapid residual removal VHP sterilization system that uses a separate sterilization HEPA filter to filter the hydrogen peroxide vaporized in the flash evaporator, ensuring aseptic filtration of the sterilization gas. At the same time, the sterilization HEPA filter is not installed on the air supply duct, which solves the problem of residual hydrogen peroxide on the sterilization HEPA filter causing an increase in residual removal time when the air supply component is working to remove residual gases from the sterilization chamber, and also improves the service life of the HEPA filter. Attached Figure Description

[0019] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this application.

[0020] Figure 1 This is a schematic diagram of the overall structure of a VHP sterilization system provided in an embodiment of this application.

[0021] In the above attached figures,

[0022] 1. Sterilization chamber; 2. Air supply duct; 3. High-efficiency air supply filter; 4. Air supply butterfly valve; 5. Exhaust duct; 6. High-efficiency exhaust filter; 7. Exhaust butterfly valve; 8. Pressure relief duct; 9. Pressure relief butterfly valve; 10. Flash evaporator; 11. First duct; 12. Sterilization high-efficiency filter; 13. Second duct; 14. Internal circulation fan; 15. Third duct; 16. Catalyst supply device; 17. First internal circulation butterfly valve; 18. Second internal circulation butterfly valve; 19. First catalytic decomposition butterfly valve; 20. Second catalytic decomposition butterfly valve; 21. Air supply fan; 22. Exhaust fan. Detailed Implementation

[0023] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0024] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this document, "electrical connection" includes the situation where constituent elements are connected together by an element having some electrical function. There is no particular limitation on the "electrically functioning element," as long as it enables the transmission and reception of electrical signals between the connected constituent elements. An "electrically functioning element" can be, for example, an electrode or wiring, a switching element such as a transistor, or other functional elements such as a resistor, inductor, or capacitor. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0025] In this application, the terms "upper," "lower," "inner," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Example

[0026] One embodiment of this application provides a rapid residue removal VHP sterilization system, such as... Figure 1 As shown, the VHP sterilization system includes a sterilization chamber 1, into which vaporized hydrogen peroxide is introduced to sterilize the interior.

[0027] It also includes an air supply assembly, which includes an air supply duct 2 and an air supply high-efficiency filter 3. The air supply duct 2 is connected to the interior of the sterilization chamber 1. The air supply high-efficiency filter 3 is installed on the air supply duct 2 to filter the airflow sent into the sterilization chamber 1 from the air supply duct 2. The air supply duct 2 is connected to the top of the sterilization chamber 1. An air supply butterfly valve 4 is installed on the air supply duct 2 between the air supply fan and the air supply high-efficiency filter 3.

[0028] It also includes an exhaust assembly, which includes an exhaust duct 5 and an exhaust HEPA filter 6. The exhaust duct 5 is connected to the interior of the sterilization chamber 1. The exhaust HEPA filter 6 is installed on the exhaust duct 5 to filter the airflow discharged from the sterilization chamber 1 in the exhaust duct 5. The exhaust duct 5 is connected to the bottom of the sterilization chamber 1. An exhaust butterfly valve 7 is installed on the exhaust duct 5 between the exhaust HEPA filter 6 and the sterilization chamber 1. A pressure relief pipe 8 is connected in parallel at the location where the exhaust butterfly valve 7 is installed on the exhaust duct 5. A pressure relief butterfly valve 9 is installed on the pressure relief pipe 8.

[0029] The system also includes a sterilization assembly, comprising a flash evaporator 10, a first pipe 11, and a sterilization HEPA filter 12. The flash evaporator 10 is used to vaporize the hydrogen peroxide solution. One end of the first pipe 11 is connected to the flash evaporator 10, and the other end is connected to the interior of the sterilization chamber. The sterilization HEPA filter 12 is installed on the first pipe 11 to filter the vaporized hydrogen peroxide supplied to the sterilization chamber 1 through the first pipe 11. The sterilization assembly also includes a second pipe 13 and an internal circulation fan 14. One end of the second pipe 13 is connected to the interior of the sterilization chamber 1, and the other end is connected to the flash evaporator 10. The internal circulation fan 14 is installed on the second pipe 13 to discharge the vaporized hydrogen peroxide in the sterilization chamber 1 to the flash evaporator 10. The sterilization assembly also includes a third pipe 15 and a catalyst supply device 16 for supplying catalyst. Device 16 is installed on the third pipe 15. One end of the third pipe 15 is connected to the first pipe 11 between the high-efficiency filter and the sterilization chamber 1, and the other end of the third pipe 15 is connected to the second pipe 13 between the internal circulation fan 14 and the sterilization chamber 1. A first catalytic decomposition butterfly valve 19 is installed on the third pipe 15 between the catalyst supply device 16 and the first pipe 11. A second catalytic decomposition butterfly valve 20 is installed on the third pipe 15 between the catalyst supply device 16 and the second pipe 13. A first internal circulation butterfly valve 17 is installed on the first pipe 11 between the sterilization high-efficiency filter 12 and the sterilization chamber 1. The first internal circulation butterfly valve 17 is close to the sterilization chamber 1. A second internal circulation butterfly valve 18 is installed on the second pipe 13 between the internal circulation fan 14 and the sterilization chamber 1. The second internal circulation butterfly valve 18 is close to the sterilization chamber 1.

[0030] At the start of sterilization, activate the flash evaporator 10, the internal circulation fan 14, the two internal circulation butterfly valves, and the pressure relief butterfly valve 9.

[0031] The flash evaporator 10 vaporizes hydrogen peroxide. The vaporized hydrogen peroxide is filtered through the sterilization high-efficiency filter 12 in the first pipe 11 and then enters the sterilization chamber 1. The internal circulation process is achieved by the internal circulation fan 14. The internal circulation fan 14 returns the vaporized hydrogen peroxide that has entered the sterilization chamber 1 to the flash evaporator 10 through the second pipe 13. The vaporized hydrogen peroxide is filtered through the high-efficiency filter before the flash evaporator 10 and then enters the sterilization chamber 1 again, thus achieving the effect of circulating vaporized hydrogen peroxide.

[0032] After sterilization, the residual removal process begins. For the first 10 minutes (time can be set manually), the supply fan, exhaust fan 22, supply butterfly valve 4, and exhaust butterfly valve 7 are activated. The supply fan directs airflow into the supply duct 2. The airflow in the supply duct 2 is filtered through the supply HEPA filter 3 before entering the sterilization chamber 1 to remove hydrogen peroxide. Simultaneously, the exhaust fan operates, drawing gas from the sterilization chamber 1, along with hydrogen peroxide, through the exhaust duct 5 and filtering it through the exhaust HEPA filter 6 before exhausting it. After 10 minutes of residual removal, a large amount of vaporized hydrogen peroxide (and even some condensation) remains in the sterilization HEPA filter 12 before the flash evaporator 10 during the sterilization process. (In case of a situation on the filter), after 10 minutes of residual removal, close the two internal circulation butterfly valves and open the two catalytic decomposition butterfly valves. The hydrogen peroxide on the high-efficiency filter is catalytically decomposed by the manganese dioxide catalyst blown out by the internal circulation fan 14. This process continues for 1-2 hours (the time can be set by the user). Note that this process continues to run after the equipment is shut down until the set time is up. The purpose is to avoid residual hydrogen peroxide remaining on the pipes, fans, and other equipment, causing corrosion and affecting the service life of the equipment. The catalytic decomposition is carried out by the manganese dioxide catalyst. At the same time, because the two internal circulation butterfly valves are closed, the hydrogen peroxide content in the chamber will drop rapidly, achieving the effect of rapid residual removal.

[0033] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. A rapid residue removal VHP sterilization system, characterized in that: include: Sterilization chamber An air supply assembly includes an air supply duct and an HEPA filter. The air supply duct connects to the interior of the sterilization chamber, and the HEPA filter is installed on the air supply duct to filter the airflow entering the sterilization chamber from the air supply duct. An exhaust system includes an exhaust duct and an exhaust HEPA filter. The exhaust duct connects to the interior of the sterilization chamber, and the exhaust HEPA filter is installed on the exhaust duct to filter the airflow exiting the sterilization chamber from the exhaust duct. The sterilization assembly includes a flash evaporator, a first pipe, and a sterilization high-efficiency filter. The flash evaporator is used to vaporize hydrogen peroxide solution. One end of the first pipe is connected to the flash evaporator, and the other end of the first pipe is connected to the interior of the sterilization chamber. The sterilization high-efficiency filter is installed on the first pipe to filter the vaporized hydrogen peroxide sent into the sterilization chamber from the first pipe.

2. The rapid residue removal VHP sterilization system as described in claim 1, characterized in that: The sterilization assembly includes a second pipe and an internal circulation fan. One end of the second pipe is connected to the interior of the sterilization chamber, and the other end of the second pipe is connected to the flash evaporator. The internal circulation fan is installed on the second pipe to discharge vaporized hydrogen peroxide in the sterilization chamber to the flash evaporator.

3. The rapid residue removal VHP sterilization system as described in claim 2, characterized in that: The sterilization assembly includes a third pipe and a catalyst supply device. The catalyst supply device is disposed on the third pipe. One end of the third pipe is connected to a first pipe between the high-efficiency filter and the sterilization chamber, and the other end of the third pipe is connected to a second pipe between the internal circulation fan and the sterilization chamber.

4. The rapid residue removal VHP sterilization system as described in claim 3, characterized in that: A first catalytic decomposition butterfly valve is provided on the third pipeline between the catalyst supply device and the first pipeline, and a second catalytic decomposition butterfly valve is provided on the third pipeline between the catalyst supply device and the second pipeline.

5. The rapid residue removal VHP sterilization system as described in claim 2, characterized in that: A first internal circulation butterfly valve is installed on the first pipe between the sterilization high-efficiency filter and the sterilization chamber, and the first internal circulation butterfly valve is close to the sterilization chamber; a second internal circulation butterfly valve is installed on the second pipe between the internal circulation fan and the sterilization chamber, and the second internal circulation butterfly valve is close to the sterilization chamber.

6. The rapid residue removal VHP sterilization system as described in claim 1, characterized in that: An air supply butterfly valve is installed on the air supply duct between the air supply fan and the air supply high-efficiency filter.

7. The rapid residue removal VHP sterilization system as described in claim 1, characterized in that: An exhaust butterfly valve is installed on the exhaust duct between the exhaust high-efficiency filter and the sterilization chamber. A pressure relief pipe is connected in parallel to the location on the exhaust duct where the exhaust butterfly valve is installed, and a pressure relief butterfly valve is installed on the pressure relief pipe.

8. The rapid residue removal VHP sterilization system as described in claim 1, characterized in that: The air supply duct connects to the top of the sterilization chamber, and the exhaust duct connects to the bottom of the sterilization chamber.

9. The rapid residue removal VHP sterilization system as described in claim 2, characterized in that: The first pipe is connected to the upper part of the sterilization chamber, and the second pipe is connected to the lower part of the sterilization chamber.

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