Disinfection device, all fresh air purification air conditioning system and disinfection method

Abstract

The invention provides a disinfection device, a full fresh air purification air-conditioning system and a disinfection method, and belongs to the field of disinfection of purification environments in sterile production areas. The disinfection device comprises a compressed air conveying pipeline, a first-stage filter, a second-stage filter, a first electromagnetic valve and an atomizing nozzle are sequentially connected to the compressed air conveying pipeline in the gas flow direction, and VHP behind the atomizing nozzle is communicated to a room through a pipeline; a metering scale is arranged below the liquid hydrogen peroxide tank, a self-suction needle is arranged in the liquid hydrogen peroxide tank, and the self-suction needle is connected with the atomizing nozzle through a liquid pipeline. Under the condition that the purification air conditioning system is not provided with an air return pipeline, the disinfectant in the disinfection area can reach the needed concentration to achieve the purpose of effective disinfection, the disinfection requirement is met, and safe production can be guaranteed.

Description

Technical Field

[0001] The present invention belongs to the field of purification and disinfection of sterile production areas, and is particularly applicable to the disinfection of purification areas using a fresh air purification air conditioning system where cross contamination may occur due to the use of room return air and all the air delivered into the room needs to be exhausted. The present invention specifically relates to a disinfection device, a fresh air purification air conditioning system and a disinfection method. Background Art

[0002] In the clean area of ​​the sterile production environment, disinfection is a necessary work content. How to disinfect the sterile area while ensuring the safety of personnel has become a matter that needs to be comprehensively considered in the early stage of design. Vaporized hydrogen peroxide sterilization, also known as vaporized hydrogen peroxide, or Vaporized Hydrogen Peroxide (VHP), uses the advantage that hydrogen peroxide in gas state at room temperature is more capable of killing bacterial spores than in liquid state to achieve the sterilization requirements. The working principle of hydrogen peroxide is to dissociate highly active hydroxyl groups through complex chemical reactions and destroy cell membranes. VHP disinfection and sterilization can be carried out at room temperature. During the disinfection and sterilization process, vaporized hydrogen peroxide is reduced to water and oxygen, without harmful residues, and is harmless to operators and the environment.

[0003] Conventional purification area disinfection systems use air conditioning and air supply systems to circulate disinfectants through return air ducts to achieve a certain disinfection concentration for disinfection of the purification area. However, some purification areas cannot be equipped with return air according to process requirements, and all air needs to be exhausted. In this case, for process production safety, the system does not have a return air duct, so air cannot be circulated through the return air duct, and disinfectants cannot be transported to the disinfection room area through the air conditioning system. In order to disinfect, some project owners reluctantly added a return air duct, which caused a huge risk of leakage and pollution to production safety. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a disinfection device, a fresh air purification air-conditioning system and a disinfection method. Even if the purification air-conditioning system does not have a return air duct for air circulation to continuously deliver the disinfectant into the room, the disinfectant in the disinfection area can reach the required concentration to achieve the purpose of effective disinfection.

[0005] The present invention is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a disinfection device, comprising:

[0007] A compressed air delivery pipeline, wherein a primary filter, a secondary filter, a first solenoid valve and an atomizing nozzle are sequentially connected to the compressed air delivery pipeline along a gas flow direction, and the atomizing nozzle is connected to a VHP pipeline;

[0008] A liquid hydrogen peroxide tank, wherein a measuring scale is arranged below the liquid hydrogen peroxide tank, a self-priming needle is arranged in the liquid hydrogen peroxide tank, and the self-priming needle is connected to the atomizing nozzle through a liquid pipeline.

[0009] A further improvement of the present invention is:

[0010] The liquid pipeline is provided with a second solenoid valve.

[0011] A further improvement of the present invention is:

[0012] The compressed air delivery pipeline is also provided with an on-site pressure gauge, a pressure control valve, a pressure sensor and a seat valve;

[0013] The pressure sensor is signal-connected to the pressure control valve.

[0014] A further improvement of the present invention is:

[0015] The VHP pipeline is provided with a tubular electric heating element and a temperature sensor, and the tubular electric heating element and the temperature sensor are connected via a signal.

[0016] A further improvement of the present invention is:

[0017] The VHP pipeline is also provided with an electric regulating valve;

[0018] The disinfection device also includes a VHP concentration sensor arranged in the room, and a signal connection is provided between the VHP concentration sensor and the electric regulating valve.

[0019] A further improvement of the present invention is:

[0020] A pressure safety valve is provided on the VHP pipeline; and / or,

[0021] A third solenoid valve leading to each room is arranged on the VHP pipeline.

[0022] A second aspect of the present invention provides a fresh air purification air conditioning system, comprising:

[0023] A disinfection device as described;

[0024] Fresh air duct, wherein the fresh air duct has a primary filter, a blower, a medium-efficiency filter, an electric constant air volume valve with a remote opening and closing function, and a high-efficiency filter vent in sequence along the air flow direction, and the high-efficiency filter vent is connected to the purification room;

[0025] An exhaust duct, one end of which is connected to the room through a side exhaust port, and the exhaust duct is sequentially connected with an electric variable air volume valve with a remote opening and closing function, a medium efficiency filter, a high efficiency filter and an exhaust fan.

[0026] A further improvement of the present invention is:

[0027] The fresh air purification air conditioning system further includes a pressure difference sensor, which is arranged in the room and is connected to the electric variable air volume valve signal;

[0028] The pressure difference sensor detects the pressure difference in the room in real time, and controls the opening and closing size of the electric variable air volume valve according to the pressure difference.

[0029] The third aspect of the present invention provides a disinfection method for disinfecting the purification area served by the fresh air purification air conditioning system, specifically:

[0030] When the purification area served by the fresh air purification air conditioning system needs to be disinfected, the air supply fan and the exhaust fan are turned off, the doors between the rooms in the purification area are opened, the door gaps connecting the purification area to be disinfected with other areas are blocked, and the electric constant air volume valve and the electric variable air volume valve are remotely closed at the same time. At this time, the purification air conditioning area to be disinfected forms a closed space, and then the third solenoid valve, the first solenoid valve and the second solenoid valve in the disinfection device are opened to disinfect the room;

[0031] After the disinfection is completed, the third solenoid valve, the first solenoid valve and the second solenoid valve are closed, the electric constant air volume valve and the electric variable air volume valve are remotely opened, and the air supply fan and the exhaust fan are turned on to ventilate the room;

[0032] After disinfection is completed, the fresh air purification air conditioning system enters normal working state.

[0033] A further improvement of the present invention is:

[0034] When the disinfection device is used to disinfect a room, the amount of liquid hydrogen peroxide required is first calculated according to the volume of the room to be disinfected and set on a measuring scale;

[0035] Open the first solenoid valve and the third solenoid valve, and the compressed air enters the atomizing nozzle after being filtered through the primary filter and the secondary filter in turn. At the same time, open the second solenoid valve, and the self-priming needle automatically absorbs the liquid hydrogen peroxide in the liquid hydrogen peroxide tank. The liquid hydrogen peroxide is sucked into the atomizing nozzle for atomization due to the Venturi effect, and forms vaporized hydrogen peroxide after passing through the tubular electric heating element controlled by the thyristor unit, and then transported to the room through the VHP pipeline for disinfection;

[0036] When the liquid hydrogen peroxide absorbed by the self-priming needle measured by the metering scale reaches the set value, the second solenoid valve is controlled to close, and after the disinfection is completed, the first solenoid valve and the third solenoid valve are closed.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The fresh air purification air conditioning system of the present invention can achieve the required concentration of disinfectant in the disinfection area to achieve the purpose of effective disinfection without setting a return air duct, thereby meeting the disinfection needs and avoiding cross contamination to ensure safe production.

[0039] When the present invention is used to disinfect the purification area served by the fresh air purification air-conditioning system, the supply fan and the exhaust fan are turned off, the doors between the rooms inside the purification area are opened, the door gaps connecting the purification area to be disinfected with other areas are blocked, and the electric constant air volume valve and the electric variable air volume valve are remotely closed at the same time. At this time, the purification area to be disinfected forms a closed space, and then the third solenoid valve, the first solenoid valve and the second solenoid valve in the disinfection device are opened to disinfect the rooms in the purification area; after the disinfection is completed, the third solenoid valve and the first solenoid valve are closed, the electric constant air volume valve and the electric variable air volume valve are remotely opened, and the supply fan and the exhaust fan are turned on to ventilate the room; after the disinfection is completed, the fresh air purification air-conditioning system enters a normal working state.

[0040] In the present invention, a metering scale is arranged at the lower end of the liquid hydrogen peroxide tank to measure the amount of liquid hydrogen peroxide sucked by the self-priming needle. When the liquid hydrogen peroxide sucked by the self-priming needle measured by the metering scale reaches a set value (calculated value), the second solenoid valve is closed, so that the disinfection area can obtain an effective disinfection concentration while avoiding the waste of liquid hydrogen peroxide (disinfectant). BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a fresh air purification air conditioning system provided by the present invention.

[0042] In the figure,

[0043] 1. Supply fan; 2. Exhaust fan; 3. Constant air volume valve; 4. Variable air volume valve;

[0044] 5. The third solenoid valve; 6. The primary filter; 7. The secondary filter; 8. The first solenoid valve;

[0045] 9. Local pressure gauge; 10. Pressure control valve; 11. Pressure sensor; 12. Seat valve;

[0046] 13. Weighing scale; 14. Self-priming needle; 15. Liquid hydrogen peroxide tank; 16. Second solenoid valve;

[0047] 17. Atomizing nozzle; 18. Electric heating element; 19. Temperature sensor; 20. Pressure safety valve;

[0048] 21. Electric regulating valve; 22. VHP concentration sensor. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0050] [Example 1]

[0051] The present invention provides a disinfection device, such as Figure 1 As shown, including:

[0052] A compressed air delivery pipeline, wherein a primary filter 6, a secondary filter 7, a first solenoid valve 8 and an atomizing nozzle 17 are sequentially connected to the compressed air delivery pipeline along the gas flow direction, and a VHP pipeline is connected to the atomizing nozzle 17, and the end of the VHP pipeline is connected to the area (room) to be disinfected;

[0053] A liquid hydrogen peroxide tank 15 is provided with a weighing scale 13 below the liquid hydrogen peroxide tank 15 , a self-priming needle 14 is provided in the liquid hydrogen peroxide tank 15 , and the self-priming needle 14 is connected to the atomizing nozzle 17 through a liquid pipeline, and a second solenoid valve 16 is provided on the liquid pipeline.

[0054] The primary filter 6 adopts a U-class filter with a filtering accuracy of 1 μm; the secondary filter 7 adopts an H-class or S-class filter with a filtering accuracy of 0.01 μm. The compressed air is filtered and dried, and the clean compressed air is put into use.

[0055] In the present invention, a weighing scale is arranged below the liquid hydrogen peroxide tank to measure the amount of liquid hydrogen peroxide sucked by the self-priming needle. When the amount of liquid hydrogen peroxide sucked by the self-priming needle measured by the weighing scale reaches a set value (calculated value), the second solenoid valve 16 is closed, so that the disinfection area can obtain an effective disinfection concentration while avoiding the waste of liquid hydrogen peroxide (disinfectant).

[0056] Preferably, the disinfection device also includes a control module, which is respectively connected to the metering scale and the second control valve signal. When the metering scale measures that the liquid hydrogen peroxide sucked by the self-priming needle reaches a set value (calculated value), a signal is sent to the control module, and the control module controls the second solenoid valve to close.

[0057] When disinfection is required, firstly, the amount of liquid hydrogen peroxide required needs to be calculated according to the volume (or volume) of the area to be disinfected and set on the weighing scale 13, the first solenoid valve 8 is opened, and the compressed air enters the atomizing nozzle 17 after being filtered through the primary filter 6 and the secondary filter 7 in sequence, and the second solenoid valve 16 is opened at the same time, and the self-priming needle 14 automatically absorbs the liquid hydrogen peroxide in the liquid hydrogen peroxide tank 15. Due to the Venturi effect, the liquid hydrogen peroxide is sucked into the atomizing nozzle 17 for atomization to form vaporized hydrogen peroxide (VHP), and then transported to the disinfection area through the VHP pipeline for disinfection. When the weighing scale 13 measures the liquid hydrogen peroxide absorbed by the self-priming needle 14 to obtain a set value (calculated value), the second solenoid valve 16 is closed. After the disinfection is completed, the first solenoid valve 8 is closed.

[0058] [Example 2]

[0059] The compressed air delivery pipeline is also provided with an on-site pressure gauge 9, a pressure control valve 10, a pressure sensor 11, and a seat valve 12, wherein the pressure sensor 11 is signal-connected to the pressure control valve 10.

[0060] The local pressure gauge 9 is used to detect and display the pressure value in the compressed air delivery pipeline.

[0061] The pressure sensor 11 is connected to the pressure control valve 10 by signals, and is used to control the pressure value of the compressed air on the compressed air delivery pipeline to a set value or a required value.

[0062] The seat valve 12 is used to control the flow of compressed gas.

[0063] [Example 3]

[0064] The VHP pipeline is provided with a tubular electric heating element 18 and a temperature sensor 19, and the tubular electric heating element 18 and the temperature sensor 19 are connected via a signal to control the atomized H 2 O 2 The temperature is such that the larger particles of gaseous hydrogen peroxide coming out of the atomizing nozzle 17 are heated by the tubular electric heating element 18 to form smaller particles of gaseous hydrogen peroxide, that is, the disinfection effect is ensured while the hydrogen peroxide is in a vaporized state.

[0065] Preferably, the tubular electric heating element 18 in the present invention is a tubular electric heating element controlled by a thyristor unit.

[0066] The VHP pipeline is also provided with an electric regulating valve 21, and the disinfection device also includes a VHP concentration sensor 22 arranged in the disinfection area. The VHP concentration sensor 22 is signal-connected to the electric regulating valve 21. When the VHP concentration sensor 22 detects that the VHP concentration in the disinfection area reaches a set value, the electric regulating valve 21 is controlled to be closed.

[0067] A pressure safety valve 20 is provided on the VHP pipeline to release pressure to the outside when the pressure in the pipeline exceeds a safety value.

[0068] The VHP pipeline can be connected to multiple branch pipelines in parallel at the same time, each branch pipeline is connected to each room in the disinfection area respectively, and a third solenoid valve 5 is arranged on each branch pipeline to accelerate the purification area to be disinfected to reach the required concentration.

[0069] [Example 4]

[0070] The embodiment of the present invention provides a fresh air purification air conditioning system, such as Figure 1 As shown, including:

[0071] The disinfection device;

[0072] Fresh air duct, wherein the fresh air duct is provided with a primary filter, a blower 1, a medium-efficiency filter, an electric constant air volume valve 3 and a high-efficiency filter vent in sequence along the air flow direction, the high-efficiency filter vent is connected to the purification area, and the air of the fresh air duct enters each room in the purification area through the high-efficiency filter vent; wherein the electric constant air volume valve 3 adopts TVT-easy electric air volume control (24V) with a remote opening and closing function;

[0073] The exhaust duct is connected to the room through a side exhaust port, and an electric variable air volume valve 4, a medium efficiency filter, a high efficiency filter and an exhaust fan 2 are sequentially connected to the exhaust duct. A pressure difference sensor is also provided in the room, and the pressure difference sensor is connected to the electric variable air volume valve 4 signal. The pressure difference sensor monitors the pressure difference in the room in real time, and controls the opening and closing size (opening degree) of the electric variable air volume valve 4 according to the pressure difference; wherein the electric variable air volume valve 4 adopts a BPC type electric air volume control (24V) with a remote opening and closing function.

[0074] As a preferred embodiment, the fresh air duct can be connected in parallel with multiple branch air supply ducts, each air supply branch is connected to a room respectively, and an electric constant air volume valve 3 is arranged on each air supply branch. At the same time, the exhaust duct can also be connected in parallel with multiple exhaust branch ducts, each exhaust branch is connected to a room respectively, and an electric variable air volume valve 4 is arranged on each exhaust branch. A pressure difference sensor is arranged in each room, and the pressure difference sensor is connected to the signal of the electric variable air volume valve 4. The pressure difference sensor monitors the pressure difference in the room in real time, and controls the opening and closing size (opening degree) of the electric variable air volume valve 4 according to the pressure difference.

[0075] When the fresh air purification air conditioning system serving the clean room needs to disinfect the purification area (room), the air supply fan 1 and the exhaust fan 2 are turned off, and the doors of the rooms in the purification area that needs to be disinfected are opened except for the doors connected to other areas, and the door gaps of the doors connected to other areas are blocked, so that the purification area that needs to be disinfected forms a closed space, and at the same time, the electric constant air volume valve 3 and the electric variable air volume valve 4 are remotely closed. At this time, the air-conditioned area that needs to be disinfected forms a closed space, which is conducive to the disinfectant reaching the required concentration, and then the third solenoid valve 5, the first solenoid valve 8 and the second solenoid valve 16 in the disinfection device are opened to disinfect the purification area (room);

[0076] After the disinfection is completed, the third solenoid valve 5, the first solenoid valve 8 and the second solenoid valve 16 are closed, the electric constant air volume valve 3 and the electric variable air volume valve 4 are remotely opened, and the air supply fan 1 and the exhaust fan 2 are turned on to ventilate the purification area (room);

[0077] After disinfection is completed, the purification air conditioning system can enter normal working state.

[0078] When the disinfection device is used to disinfect a room, the amount of liquid hydrogen peroxide required is first calculated according to the volume of the room to be disinfected and set on the weighing scale 13;

[0079] Open the first solenoid valve 8 and the third solenoid valve 5, and the compressed air is filtered through the primary filter 6 and the secondary filter 7 in sequence and then enters the atomizing nozzle. At the same time, open the second solenoid valve 16, and the self-absorption needle 14 draws the liquid hydrogen peroxide in the liquid hydrogen peroxide tank 15 to the atomizing nozzle 17 for atomization and heating by the heating element to form vaporized hydrogen peroxide, which is then transported to the room through the VHP pipeline for disinfection;

[0080] When the weighing scale 13 measures the liquid hydrogen peroxide absorbed by the self-absorption needle 14 to obtain a set value, the second electromagnetic valve 16 is closed. After the disinfection is completed, the first electromagnetic valve 8 and the third electromagnetic valve 5 are closed.

[0081] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0083] The above technical solution is only one implementation mode of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the present invention, and it is not limited to the technical solution described in the above specific embodiments of the present invention. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A disinfection device, It is characterized in that include: A compressed air delivery pipeline, wherein a primary filter, a secondary filter, a first solenoid valve and an atomizing nozzle are sequentially connected to the compressed air delivery pipeline along a gas flow direction, and the atomizing nozzle is connected to a VHP pipeline; A liquid hydrogen peroxide tank, wherein a measuring scale is arranged below the liquid hydrogen peroxide tank, a self-priming needle is arranged in the liquid hydrogen peroxide tank, and the self-priming needle is connected to the atomizing nozzle through a liquid pipeline.

2. The disinfection device according to claim 1, It is characterized in that The liquid pipeline is provided with a second solenoid valve.

3. The disinfection device according to claim 1, It is characterized in that The compressed air delivery pipeline is also provided with an on-site pressure gauge, a pressure control valve, a pressure sensor and a seat valve; The pressure sensor is signal-connected to the pressure control valve.

4. The disinfection device according to claim 1, It is characterized in that The VHP pipeline is provided with a tubular electric heating element and a temperature sensor, and the tubular electric heating element and the temperature sensor are connected via a signal.

5. The disinfection device according to claim 1, It is characterized in that The VHP pipeline is also provided with an electric regulating valve; The disinfection device also includes a VHP concentration sensor arranged in the room, and a signal connection is provided between the VHP concentration sensor and the electric regulating valve.

6. The disinfection device according to claim 1, It is characterized in that A pressure safety valve is provided on the VHP pipeline; and / or, A third solenoid valve leading to each room is arranged on the VHP pipeline.

7. A new air purification air conditioning system, It is characterized in that include: The disinfection device according to any one of claims 1 to 6; A fresh air pipeline, wherein a primary filter, a blower, a medium-efficiency filter, an electric constant air volume valve with a remote opening and closing function, and a high-efficiency filter vent are arranged in sequence along the air flow direction, and the high-efficiency filter vent is connected to the purification area; An exhaust duct, one end of which is connected to the room through a side exhaust port, and the exhaust duct is sequentially connected with an electric variable air volume valve with a remote opening and closing function, a medium efficiency filter, a high efficiency filter and an exhaust fan.

8. The fresh air purification air conditioning system according to claim 7, It is characterized in that The fresh air purification air conditioning system further includes a pressure difference sensor, which is arranged in the room and is connected to the electric variable air volume valve signal; The pressure difference sensor detects the pressure difference in the room in real time, and controls the opening and closing size of the electric variable air volume valve according to the pressure difference.

9. A method of disinfection, It is characterized in that Disinfecting the purification area served by the fresh air purification air conditioning system as claimed in claim 7 or 8, specifically: When the purification area served by the fresh air purification air conditioning system needs to be disinfected, the supply fan and the exhaust fan are turned off, the doors between the rooms in the purification area are opened, the door gaps connecting the purification area to be disinfected with other areas are blocked, and the electric constant air volume valve described in claim 8 and the electric variable air volume valve described in claim 8 are remotely closed. At this time, the purification air conditioning area to be disinfected forms a closed space, and then the third solenoid valve, the first solenoid valve and the second solenoid valve in the disinfection device are opened to disinfect the room; After the disinfection is completed, the third solenoid valve, the first solenoid valve and the second solenoid valve are closed, the electric constant air volume valve and the electric variable air volume valve are remotely opened, and the air supply fan and the exhaust fan are turned on to ventilate the room; After disinfection is completed, the fresh air purification air conditioning system enters normal working state.

10. The disinfection method according to claim 9, It is characterized in that When the disinfection device is used to disinfect a room, the amount of liquid hydrogen peroxide required is first calculated according to the volume of the room to be disinfected and set on a measuring scale; Open the first solenoid valve and the third solenoid valve, and the compressed air enters the atomizing nozzle after being filtered through the primary filter and the secondary filter in turn. At the same time, open the second solenoid valve, and the self-priming needle automatically absorbs the liquid hydrogen peroxide in the liquid hydrogen peroxide tank. The liquid hydrogen peroxide is sucked into the atomizing nozzle for atomization due to the Venturi effect, and forms vaporized hydrogen peroxide after passing through the tubular electric heating element controlled by the thyristor unit, and then transported to the room through the VHP pipeline for disinfection; When the liquid hydrogen peroxide absorbed by the self-priming needle measured by the metering scale reaches the set value, the second solenoid valve is controlled to close, and after the disinfection is completed, the first solenoid valve and the third solenoid valve are closed.

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