A combined hydrogen peroxide and formaldehyde disinfection device

Abstract

This utility model provides a combined hydrogen peroxide and formaldehyde disinfection device, belonging to the field of disinfection device technology. It includes a chassis, a liquid storage system, and a distribution and transmission system. The liquid storage system comprises two storage tanks: a first storage tank and a second storage tank. The first storage tank contains hydrogen peroxide sterilization solution, and the second storage tank contains formaldehyde solution. Both the first and second vaporization delivery pipes are connected to the air conditioning duct. The beneficial effects of this utility model are: this combined disinfection device integrates two independent vaporization generation systems, combining hydrogen peroxide sterilization and formaldehyde fumigation functions into one. Furthermore, targeting the toxic gases remaining after formaldehyde sterilization, it utilizes the highly reactive hydroxyl radicals (·OH) generated after hydrogen peroxide vaporization to initiate a chain reaction with formaldehyde molecules in the air. This significantly shortens the ventilation and residual formaldehyde removal time after sterilization, reducing the harm to operators and environmental pollution caused by residual formaldehyde.

Description

Technical Field

[0001] This utility model relates to the field of disinfection device technology, specifically a combined disinfection device using hydrogen peroxide and formaldehyde. Background Technology

[0002] In the fields of medical care, pharmaceuticals, and biosafety, efficient and thorough disinfection and sterilization of enclosed spaces (such as isolation wards, laboratories, and air conditioning duct systems) is a key step in controlling cross-infection.

[0003] Chinese Patent Application No. CN201720276185.8 discloses a low-temperature vaporization disinfection system, comprising a storage system for storing disinfectant, an atomization separation system for atomizing the disinfectant, a drive system for providing power to the atomization separation system, a vaporization separation system for separating and vaporizing the atomized disinfectant, and a sterilization chamber for disinfection and sterilization using the vaporized disinfectant particles. The drive system is sequentially connected to the atomization separation system, the vaporization separation system, and the sterilization chamber, and the sterilization chamber is also connected to the drive system. The storage system is connected to the atomization separation system and is used to provide disinfectant to the atomization separation system and to recover the disinfectant accumulated in the atomization separation system. The disinfectant particles produced by this application are small, most of them reaching the size of bacteria or smaller, and can remain suspended in the air for a long time, achieving sterilization through full contact with airborne bacteria.

[0004] Currently, mainstream low-temperature sterilization technologies include hydrogen peroxide sterilization and formaldehyde fumigation sterilization. Hydrogen peroxide sterilization technology, especially vaporized hydrogen peroxide (VHP), is widely used because its sterilization decomposition products are water and oxygen, making it environmentally friendly and non-toxic. However, single vaporized hydrogen peroxide systems suffer from weak penetration, require high uniformity in large, complex environments, and their effectiveness in killing spores is greatly affected by temperature and humidity, easily leading to sterilization dead zones. Formaldehyde fumigation sterilization has excellent penetration and broad material compatibility, effectively killing various microorganisms, including spores. However, formaldehyde gas is classified as a Group 1 carcinogen by the International Agency for Research on Cancer, possessing strong irritant and toxic properties. Furthermore, the residues after sterilization are difficult to decompose, with long decomposition times, posing significant safety hazards to operators and the environment. In addition, the paraformaldehyde crystals produced after formaldehyde fumigation can corrode precision instruments and equipment, and ventilation to remove residues can take tens of hours, severely impacting space turnover efficiency.

[0005] Currently, there is a lack of equipment that can combine the advantages of both. Typically, separate hydrogen peroxide and formaldehyde sterilization equipment needs to be purchased, which not only occupies space but also fails to achieve coordinated treatment of the same space. Especially in sterile environments requiring rapid turnover and strict residue control, the residue issues after using formaldehyde alone and the insufficient penetrating power of hydrogen peroxide alone become difficult technical challenges to address simultaneously. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, this utility model provides a combined disinfection device using hydrogen peroxide and formaldehyde.

[0007] This includes the chassis, liquid storage system, and distribution and transmission system;

[0008] The liquid storage system includes two storage tanks: a first storage tank and a second storage tank. The first storage tank contains hydrogen peroxide sterilization solution, and the second storage tank contains formaldehyde solution. The first storage tank is connected to a first vaporization generator, and the second storage tank is connected to a second vaporization generator. The first and second vaporization generators are fixed inside a chassis. The distribution and transmission system includes multiple first vaporization delivery pipes and second vaporization delivery pipes.

[0009] The steam inlet of the first vaporization conveying pipe is connected to the first vaporization generator, and the steam outlet of the first vaporization conveying pipe extends into the air conditioning supply pipe.

[0010] The steam inlet of the second vaporization delivery pipe is connected to the second vaporization generator, and the steam outlet of the second vaporization delivery pipe extends into the air conditioning supply pipe.

[0011] Furthermore, electric butterfly valves are also provided on the first vaporization conveying pipe and the second vaporization conveying pipe.

[0012] Furthermore, it also includes a controller embedded in the chassis, the controller being connected to the first vaporization generator, the second vaporization generator, and the electric butterfly valve.

[0013] Furthermore, the liquid storage system also includes a liquid storage cabinet, with the first liquid storage tank and the second liquid storage tank both fixed inside the liquid storage cabinet. The top of the first liquid storage tank and the second liquid storage tank are each equipped with a peristaltic pump, and the two peristaltic pumps are respectively connected to a first liquid supply pipe and a second liquid supply pipe. The first liquid storage tank and the second liquid storage tank are respectively connected to a first vaporization generator and a second vaporization generator through the first liquid supply pipe and the second liquid supply pipe.

[0014] Furthermore, a blower is provided at the end of the air conditioning supply duct, and the air conditioning supply duct extends into the disinfection chamber.

[0015] Furthermore, the disinfection chamber is equipped with a hydrogen peroxide concentration sensor and a formaldehyde sensor, both of which are connected to the controller.

[0016] Furthermore, the first vaporization generator and the second vaporization generator are respectively connected to the first output main pipe and the second output main pipe, the first output main pipe is connected to the first vaporization conveying pipe, and the second output main pipe is connected to the second vaporization conveying pipe.

[0017] Furthermore, the first output main pipe is provided with a first output branch pipe, and the second output main pipe is provided with a second output branch pipe. The first output branch pipe is connected to the first vaporization conveying pipe, and the second output branch pipe is connected to the second vaporization conveying pipe.

[0018] Furthermore, a connecting joint is fixed on the top of the chassis, and the first output branch pipe and the first vaporization conveying pipe are connected through the connecting joint, and the second output branch pipe and the second vaporization conveying pipe are connected through the connecting joint.

[0019] The beneficial effects of this utility model's integrated hydrogen peroxide and formaldehyde disinfection equipment are as follows: This integrated disinfection equipment combines hydrogen peroxide sterilization and formaldehyde fumigation functions into one by integrating a first storage tank (hydrogen peroxide) and a second storage tank (formaldehyde) with two corresponding independent vaporization generation systems. Users can flexibly select the sterilization mode according to different disinfection targets, pollution levels, and instrument material requirements, making it particularly suitable for the thorough sterilization of complex tubular instruments or large spaces. Furthermore, regarding the toxic gases remaining after formaldehyde sterilization, the highly reactive hydroxyl radicals (·OH) generated after hydrogen peroxide vaporization react with formaldehyde molecules in the air in a chain reaction. This process can rapidly degrade formaldehyde into formic acid, carbon dioxide, and water, thereby significantly shortening the ventilation and residual removal time after formaldehyde sterilization, reducing the harm of formaldehyde residue to operators and environmental pollution, and solving the long-standing industry problem of "formaldehyde residue." Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a hydrogen peroxide and formaldehyde integrated disinfection device according to an embodiment of this utility model.

[0021] Figure 2 This is a front view of a hydrogen peroxide and formaldehyde integrated disinfection device according to an embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram of the first internal structure of a hydrogen peroxide and formaldehyde integrated disinfection device according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the second internal structure of a hydrogen peroxide and formaldehyde integrated disinfection device according to an embodiment of this utility model.

[0024] In the above diagram: 100-Chassis, 101-Connecting connector, 200-Liquid storage tank, 300-First liquid storage tank, 301-First liquid supply pipe, 310-Second liquid storage tank, 311-Second liquid supply pipe, 320-Peristaltic pump, 400-First vaporization generator, 401-First output main pipe, 402-First output branch pipe, 403-First vaporization delivery pipe, 410-Second vaporization generator, 411-Second output main pipe, 412-Second output branch pipe, 413-Second vaporization delivery pipe, 500-Controller, 600-Air conditioning air supply pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figures 1 to 4 The present invention relates to a combined hydrogen peroxide and formaldehyde disinfection device, comprising a casing 100, a vaporization system, a liquid storage system, a distribution and transmission system, and a controller 500.

[0029] The liquid storage system includes a liquid storage tank 200 and two liquid storage tanks. The chassis 100 and the liquid storage tank 200 are arranged adjacent to each other. The vaporization system includes two vaporization generators, namely a first vaporization generator 400 and a second vaporization generator 410, which are fixed inside the chassis 100. The two liquid storage tanks are a first liquid storage tank 300 and a second liquid storage tank 310. The first liquid storage tank 300 contains hydrogen peroxide sterilization solution, and the second liquid storage tank 310 contains formaldehyde solution. The hydrogen peroxide sterilization solution is a 35% (mass) concentration hydrogen peroxide solution. The first liquid storage tank 300 is connected to the second liquid storage tank 310. A vaporization generator 400 is included. A second storage tank 310 is connected to the second vaporization generator 410. Specifically, both the first and second storage tanks 300 and 310 are equipped with peristaltic pumps 320. A first supply pipe 301 and a second supply pipe 311 are connected to the two peristaltic pumps 320, respectively. Both the first and second supply pipes 301 and 311 pass through the storage tank 200 and the side wall of the housing 100, extending into the housing 100. The first and second storage tanks 300 and 310 are connected to the first vaporization generator 400 and the second vaporization generator 410, respectively, via the first and second supply pipes 301 and 311. The two peristaltic pumps 320 are used to peristally deliver hydrogen peroxide sterilization solution and formaldehyde solution to the first and second vaporization generators 400 and 410, respectively.

[0030] The distribution and transmission system includes multiple first vaporization conveying pipes 403 and multiple second vaporization conveying pipes 413. The steam inlet of the first vaporization conveying pipe 403 is connected to the first vaporization generator 400, and the steam outlet of the first vaporization conveying pipe 403 extends into the air conditioning supply duct 600. The steam inlet of the second vaporization conveying pipe 413 is connected to the second vaporization generator 410, and the steam outlet of the second vaporization conveying pipe 413 extends into the air conditioning supply duct 600. Specifically, the first vaporization generator 400 is connected to the first output main pipe 401, and the second vaporization generator 410 is connected to the second output main pipe 411. The first output main pipe 401 is provided with multiple first output branch pipes 402, and the second output main pipe 411 is provided with multiple second output branch pipes 412. The first output main pipe 401 is connected to the first vaporization conveying pipe 403 through the first output branch pipes 402, and the second output main pipe 411 is connected to the second vaporization conveying pipe 413 through the second output branch pipes 412.

[0031] Multiple connecting joints 101 are respectively connected to the first output main pipe 401 and the second output main pipe 411. The connecting joints 101 are fixed to the top of the chassis 100. The first vaporization conveying pipe 403 and the second vaporization conveying pipe 413 are both connected to the connecting joints 101. Each first vaporization conveying pipe 403 and a first output branch pipe 402 are connected to the same connecting joint 101. Each second vaporization conveying pipe 413 and a second output branch pipe 412 are connected to the same connecting joint 101.

[0032] The air conditioning duct 600 is equipped with a blower at its end, and the air conditioning duct 600 extends into the disinfection room.

[0033] The first vaporization generator 400 of the integrated disinfection equipment can vaporize hydrogen peroxide sterilization liquid and input it into the air conditioning supply duct 600. The second vaporization generator 410 can vaporize formaldehyde solution and input it into the air conditioning supply duct 600. The blower at the end of the air conditioning supply duct 600 connected to the disinfection chamber blows air into the disinfection chamber, thereby introducing hydrogen peroxide sterilization liquid and formaldehyde solution into the disinfection chamber.

[0034] The first vaporization generator 400 and the second vaporization generator 410 can evaporate the two solutions into vapor respectively, forming a "dry fog" effect, ensuring that the vapor undergoes Brownian motion in the space without settling, and can penetrate into every corner of the disinfection room with the air conditioning.

[0035] It should be noted that the integrated disinfection equipment can be connected to multiple disinfection rooms, and each disinfection room has a first vaporization delivery pipe 403 and a second vaporization delivery pipe 413 connected to the air conditioning supply pipe 600.

[0036] The first vaporization delivery pipe 403 and the second vaporization delivery pipe 413 are also equipped with electric butterfly valves (not shown in the figure). The controller 500 is embedded in the housing 100. The controller 500 is connected to the first vaporization generator 400, the second vaporization generator 410, the peristaltic pump 320, and the electric butterfly valve. The controller 500 can control the working status of the peristaltic pump 320 of the first vaporization generator 400 and the second vaporization generator 410, and selectively deliver to different disinfection chambers by controlling the electric butterfly valve.

[0037] The disinfection chamber is equipped with hydrogen peroxide concentration sensors and formaldehyde sensors, both of which are connected to the controller 500. The controller is also connected to the air conditioning system to jointly control the ventilation and exhaust status of the disinfection chamber.

[0038] The integrated disinfection equipment operates in three main modes: hydrogen peroxide sterilization, formaldehyde fumigation, and synergistic mode. The controller 500 is connected to the first vaporization generator 400, the second vaporization generator 410, the peristaltic pump 320, and an electric butterfly valve, controlling the operating status of these components and selecting the appropriate disinfection mode for different disinfection chambers by controlling the electric butterfly valve. The specific process is as follows:

[0039] (1) Hydrogen peroxide sterilization mode:

[0040] The hydrogen peroxide sterilization program is set by the controller 500. The peristaltic pump 320 on the top of the first storage tank 300 is started, and liquid hydrogen peroxide is precisely delivered to the first vaporization generator 400 through the first supply pipe 301.

[0041] The first vaporization generator 400 heats and vaporizes hydrogen peroxide to generate vaporized hydrogen peroxide (VHP). The vaporized hydrogen peroxide enters the first vaporization delivery pipe 403 via the first output main pipe 401 and the connecting joint 101.

[0042] The electric butterfly valve at the end of the first vaporization delivery pipe 403 opens, and vaporized hydrogen peroxide is injected into the air conditioning supply pipe 600. Under the action of the blower, it is evenly diffused into the disinfection chamber with the airflow. Vaporized hydrogen peroxide oxidizes and destroys the cell walls and nucleic acids of microorganisms, achieving Log6 level killing, and finally rapidly degrades into water and oxygen, leaving no residue.

[0043] (2) Formaldehyde fumigation mode:

[0044] The formaldehyde fumigation program is set by the controller 500. The peristaltic pump 320 on the top of the second storage tank 310 is started, and the formaldehyde solution is delivered to the second vaporization generator 410 through the second supply pipe 311.

[0045] The second vaporization generator 410 vaporizes the liquid formaldehyde solution. The formaldehyde gas enters the second vaporization delivery pipe 413 via the second output main pipe 411 and the connecting joint 101.

[0046] Space disinfection and degradation: The electric butterfly valve at the end of the second vaporization delivery pipe 413 opens, and formaldehyde gas is sent into the air conditioning supply duct 600, thus filling the entire disinfection chamber for rapid sterilization. After sterilization, the air conditioning system starts the ventilation mode to remove residual formaldehyde in the room through fresh air replacement.

[0047] (3) Collaborative Mode:

[0048] Phase 1 (Formaldehyde Sterilization): First, the above-mentioned "Formaldehyde Fumigation Mode" is executed, utilizing the strong penetrating power of formaldehyde to thoroughly sterilize the space and the interior of complex instruments.

[0049] Phase Two (Hydrogen Peroxide Degradation): After the formaldehyde sterilization cycle is completed, prolonged ventilation is not required. Controller 500 automatically switches to the hydrogen peroxide generation system. The hydrogen peroxide solution in the first storage tank 300 is vaporized by the first vaporization generator 400, generating highly reactive hydroxyl radicals (·OH), which are then sent into the disinfection chamber through the air conditioning duct 600 to undergo a chain reaction with residual formaldehyde molecules. During this process, formaldehyde is rapidly degraded into formic acid, carbon dioxide, and water.

[0050] Safe ventilation: Formaldehyde sensors installed in the disinfection chamber monitor formaldehyde concentration in real time and feed the data back to the controller 500. Once the formaldehyde concentration is detected to have degraded to below the safe threshold, the controller 500 automatically activates the blower for short-term ventilation to ensure the environment meets entry standards, thereby significantly shortening the total time of the entire disinfection cycle.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A combined hydrogen peroxide and formaldehyde disinfection device, characterized in that, Includes a chassis (100), a liquid storage system, and a distribution and transmission system; The liquid storage system includes two liquid storage tanks; the two liquid storage tanks are a first liquid storage tank (300) and a second liquid storage tank (310), the first liquid storage tank (300) contains hydrogen peroxide sterilization solution, and the second liquid storage tank (310) contains formaldehyde solution; the first liquid storage tank (300) is connected to a first vaporization generator (400); the second liquid storage tank (310) is connected to a second vaporization generator (410), and the first vaporization generator (400) and the second vaporization generator (410) are fixed inside the casing (100); The distribution and transmission system includes multiple first vaporization delivery pipes (403) and second vaporization delivery pipes (413). The steam inlet of the first vaporization conveying pipe (403) is connected to the first vaporization generator (400), and the steam outlet of the first vaporization conveying pipe (403) extends into the air conditioning supply pipe (600); the steam inlet of the second vaporization conveying pipe (413) is connected to the second vaporization generator (410), and the steam outlet of the second vaporization conveying pipe (413) extends into the air conditioning supply pipe (600).

2. The hydrogen peroxide and formaldehyde combined disinfection equipment according to claim 1, characterized in that, Electric butterfly valves are also provided on the first vaporization conveying pipe (403) and the second vaporization conveying pipe (413).

3. The hydrogen peroxide and formaldehyde combined disinfection equipment according to claim 2, characterized in that, It also includes a controller (500) embedded in the chassis (100), and the controller (500) is connected to a first vaporization generator (400), a second vaporization generator (410) and an electric butterfly valve.

4. The hydrogen peroxide and formaldehyde combined disinfection equipment according to claim 1, characterized in that, The liquid storage system also includes a liquid storage cabinet (200), and the first liquid storage tank (300) and the second liquid storage tank (310) are both fixed in the liquid storage cabinet (200). The top of the first liquid storage tank (300) and the second liquid storage tank (310) are equipped with peristaltic pumps (320). The two peristaltic pumps (320) are respectively connected to a first liquid supply pipe (301) and a second liquid supply pipe (311). The first liquid storage tank (300) and the second liquid storage tank (310) are respectively connected to a first vaporization generator (400) and a second vaporization generator (410) through the first liquid supply pipe (301) and the second liquid supply pipe (311).

5. The hydrogen peroxide and formaldehyde combined disinfection equipment according to claim 3, characterized in that, The air conditioning duct (600) is equipped with a blower at its end, and the air conditioning duct (600) extends into the disinfection chamber.

6. The hydrogen peroxide and formaldehyde combined disinfection device according to claim 5, characterized in that, The disinfection room is equipped with a hydrogen peroxide concentration sensor and a formaldehyde sensor, both of which are connected to the controller (500).

7. The hydrogen peroxide and formaldehyde combined disinfection equipment according to claim 5, characterized in that, The first vaporization generator (400) and the second vaporization generator (410) are respectively connected to the first output main pipe (401) and the second output main pipe (411). The first output main pipe (401) is connected to the first vaporization conveying pipe (403), and the second output main pipe (411) is connected to the second vaporization conveying pipe (413).

8. The hydrogen peroxide and formaldehyde combined disinfection device according to claim 7, characterized in that, The first output main pipe (401) is provided with a first output branch pipe (402), and the second output main pipe (411) is provided with a second output branch pipe (412). The first output branch pipe (402) is connected to the first vaporization conveying pipe (403), and the second output branch pipe (412) is connected to the second vaporization conveying pipe (413).

9. The hydrogen peroxide and formaldehyde combined disinfection device according to claim 8, characterized in that, The top of the chassis (100) is fixed with a connecting joint (101). The first output branch pipe (402) and the first vaporization conveying pipe (403) are connected through the connecting joint (101), and the second output branch pipe (412) and the second vaporization conveying pipe (413) are connected through the connecting joint (101).

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