A dual dehumidification system for sterilizing a plant modification vhp space

Abstract

The utility model provides a kind of workshop reconstruction VHP space sterilization double dehumidification system, including air conditioning system host and sterilization workshop, further including being set on bypass dehumidification system of return air duct, the air inlet of bypass dehumidification system is connected with the upstream pipeline of return air duct by bypass air inlet pipeline, the air outlet is connected with the downstream pipeline of return air duct by bypass air outlet pipeline, to the environment in sterilization workshop again by air conditioning system host after dry dehumidification, form double dehumidification circulation.The utility model increases a bypass, and environment wind is injected into environment by dehumidifier again dry dehumidification, can effectively solve the problem that original air conditioning humidity cannot drop or humidity cannot be stably maintained because of large external humidity during sterilization process, and reconstruction is simple, low in cost, and the humidity control problem of old workshop and coastal area is solved.

Description

Technical Field

[0001] This utility model relates to the field of air purification and sterilization technology, and in particular to a VHP space sterilization dual dehumidification system for workshop renovation. Background Technology

[0002] VHP (vaporized hydrogen peroxide) space sterilization technology is increasingly widely used in modern pharmaceuticals, biotechnology, and medical devices. Especially with the ever-increasing requirements of GMP (Good Manufacturing Practice), traditional fumigation sterilization methods can no longer meet the high standards of sterilization. Many older workshops or production environments in coastal areas face a core challenge during upgrades: insufficient humidity control. While humidity can be maintained during normal production, during VHP sterilization, due to strict initial humidity requirements (typically below 40% RH), existing air conditioning systems cannot effectively reduce humidity to the sterilization threshold, leading to sterilization failure or inability to start.

[0003] In existing technologies, air conditioning system main units typically rely on internal surface cooling and heating devices for temperature rise and dehumidification. However, in older workshops or coastal areas, dehumidification efficiency is low due to the following reasons: 1) System design limitations: Older workshops were initially built with the goal of meeting production temperature and humidity requirements only, without pre-installing the high-efficiency dehumidification configuration needed for VHP sterilization. The air conditioning unit capacity is insufficient, or the ductwork layout is unreasonable. 2) Environmental factors: Coastal areas have excessively high humidity, and poor sealing of air conditioning ducts and rooms leads to continuous moisture infiltration, creating a cumulative humidity effect that slows down or even renders the dehumidification process ineffective. 3) Circulation defects: A single air conditioning dehumidification system cannot handle high humidity loads during sterilization. Residual moisture in the return air circulates repeatedly, making it impossible to maintain stable humidity levels.

[0004] Therefore, based on the above-mentioned shortcomings, there is an urgent need for a low-cost and high-efficiency renovation solution to enhance the dehumidification capacity of the existing air conditioning system and ensure the smooth implementation of VHP sterilization. Utility Model Content

[0005] This invention addresses the problem of sterilization failure in existing old workshops and coastal areas due to insufficient or excessively fluctuating humidity during VHP space sterilization. It provides a dual dehumidification system for VHP space sterilization in workshop renovation, which achieves precise control and stable maintenance of environmental humidity through the dual dehumidification system design.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0007] A VHP (Vacuum-Powered Hierarchical) space sterilization and dehumidification system for workshop renovation includes an air conditioning system main unit and a sterilization workshop. The air conditioning system main unit is connected to the sterilization workshop through supply air ducts and return air ducts to form a circulation path. It also includes a bypass dehumidification system installed on the return air duct, wherein:

[0008] The air inlet of the bypass dehumidification system is connected to the upstream pipe of the return air pipe through a bypass air inlet pipe, and the air outlet is connected to the downstream pipe of the return air pipe through a bypass air outlet pipe, so that the ambient air in the sterilization workshop is dried and dehumidified and then sent back into the sterilization workshop through the air conditioning system host, forming a dual dehumidification cycle.

[0009] Preferably, the first air inlet of the air conditioning system main unit is connected to outdoor fresh air via a pipe and a first solenoid valve, and the second air inlet of the air conditioning system main unit is connected to the outlet of the return air pipe via a second solenoid valve, so as to realize flexible allocation of fresh air and return air.

[0010] Preferably, the outlet end of the air supply duct is connected to the top space of the sterilization workshop, and the inlet end of the return air duct is connected to the bottom space of the sterilization workshop, thereby enhancing dehumidification efficiency by utilizing natural airflow settling.

[0011] Preferably, the air conditioning system main unit further includes an exhaust pipe and an exhaust fan. The inlet end of the exhaust pipe is connected to the downstream pipe of the return air pipe through a fourth solenoid valve, and the outlet end is connected to the exhaust fan for discharging moisture in a specific mode.

[0012] Preferably, a third solenoid valve is installed on the downstream pipe of the return air duct, and the pipe between the third solenoid valve and the second bypass valve is connected to the inlet end of the discharge pipe.

[0013] Preferably, the third solenoid valve is normally closed, opens during disinfection cycle, and opens during fresh air operation; the fourth solenoid valve is normally open, closes during disinfection cycle, and opens during fresh air operation.

[0014] Preferably, there are multiple sterilization workshops arranged in parallel, each connected to the air supply duct and return air duct via branch pipes;

[0015] Furthermore, each of the sterilization workshops is equipped with an air distribution port on the top that connects to the air supply duct, and an air intake port on the side wall that connects to the return air duct.

[0016] Preferably, the inlet end of the bypass intake pipe is connected to the upstream pipe of the return air pipe through a first bypass valve, and the outlet end of the bypass outlet pipe is connected to the downstream pipe of the return air pipe through a second bypass valve.

[0017] Preferably, a fifth solenoid valve is provided on the return air duct between the first bypass valve and the second bypass valve.

[0018] Preferably, the bypass dehumidification system further includes a dehumidifier body, a surface cooling dehumidification device, a heating device, and a dehumidification fan connected in sequence, wherein:

[0019] The air inlet of the dehumidifier body is connected to the outlet end of the bypass air inlet pipe, and the air outlet of the dehumidifier fan is connected to the inlet end of the bypass air outlet pipe, thereby achieving deep dehumidification and heating of the return air.

[0020] Preferably, the workshop is modified with a VHP space sterilization dual dehumidification system. Through the coordinated control of solenoid valves such as the third, fourth, and fifth solenoid valves and the first and second bypass valves, the system can switch between different working modes, such as disinfection circulation mode and fresh air mode.

[0021] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0022] (1) High-efficiency dehumidification: The return air is dehumidified twice through the bypass dehumidification system, which effectively overcomes the environmental moisture load and ensures that the initial humidity and process humidity of sterilization are always lower than the upper limit of VHP requirements.

[0023] (2) Low-cost renovation: Only a bypass pipeline and an independent dehumidifier are added to the existing air conditioning pipeline. There is no need to replace the entire air conditioning system, which is especially suitable for rapid upgrades in old workshops and coastal areas.

[0024] (3) Flexible control: Based on the intelligent control of solenoid valves and fans, the system can be adapted to different sterilization stages such as preheating, sterilization and ventilation, thereby improving energy efficiency.

[0025] (4) Strong compatibility: It supports the parallel arrangement of multiple sterilization workshops to meet the needs of large-scale production, while complying with GMP and even more stringent FDA standards. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall framework structure of a VHP space sterilization and dual dehumidification system for workshop renovation according to this utility model;

[0027] Figure 2 This is a schematic diagram of the framework structure of the bypass dehumidification system in a VHP space sterilization dual dehumidification system for workshop renovation according to this utility model.

[0028] The accompanying figures are labeled as follows:

[0029] 100-Air conditioning system main unit, 101-Supply air duct, 102-Return air duct, 103-Third solenoid valve, 104-Exhaust duct, 105-Exhaust fan, 106-Fourth solenoid valve; 200-Sterilization workshop, 201-Air distribution outlet, 202-Air intake outlet; 300-Bypass dehumidification system, 301-Dehumidifier body, 302-Surface cooling dehumidification device, 303-Heating device, 304-Dehumidification fan, 305-Bypass intake duct, 306-First bypass valve, 307-Bypass exhaust duct, 308-Second bypass valve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In some embodiments, such as Figure 1 As shown, to address the sterilization failure problem in VHP space sterilization processes in older workshops and coastal areas due to insufficient humidity reduction or excessive humidity fluctuations, a dual dehumidification system for VHP space sterilization in workshop renovation is provided. This dual dehumidification system design achieves precise control and stable maintenance of environmental humidity. The system includes an air conditioning system main unit 100, a sterilization workshop 200, and a bypass dehumidification system 300. The air conditioning system main unit 100 supplies treated air to the sterilization workshop 200 through an air supply duct 101, and a return air duct 102 collects air from the bottom of the workshop and returns it to the main unit. The bypass dehumidification system 300 has a bypass intake duct 305 connected upstream of the return air duct 102, near the return air vent of the sterilization workshop 200; and a bypass exhaust duct 307 connected downstream of the return air duct 102, near the air intake of the air conditioning system main unit 100.

[0033] Before VHP sterilization, the system starts the heating and dehumidification mode. The air conditioning system main unit 100 first performs preliminary dehumidification and heating of the return air through the internal surface cooling and heating devices, but the humidity decreases slowly due to limited capacity. At the same time, the bypass dehumidification system 300 is started, and the bypass valves on the bypass intake pipe 305 and bypass outlet pipe 307 are opened. Part of the humid air in the return air duct 102 is introduced into the dehumidifier body 301 through the bypass intake pipe 305, and is condensed and dehumidified by the surface cooling dehumidification device 302 to remove most of the moisture. Then, it is heated to the set temperature by the heating device 303, and finally driven by the dehumidification fan 304, it returns to the downstream of the return air duct 102 through the bypass outlet pipe 307.

[0034] Dry hot air is mixed with air processed by the air conditioning unit and then reintroduced into the sterilization chamber 200 through air supply duct 101. This process is repeated continuously, rapidly reducing the humidity in the chamber to the initial sterilization requirement, such as 25% RH, and creating a stable low-humidity environment for the VHP sterilizer. Throughout the process, the dual dehumidification system continuously replenishes dry air to offset moisture leakage from the environment and the moisture load caused by personnel operations, preventing humidity rebound.

[0035] In some embodiments, such as Figure 1 As shown, the air conditioning system main unit 100 has two air inlets. The first air inlet is connected to outdoor fresh air via a duct and a first solenoid valve, and the second air inlet is connected to the outlet of the return air duct 102 via a second solenoid valve. In the initial stage of sterilization, the system can close the first solenoid valve and operate with full return air for rapid dehumidification. Once the humidity reaches the target level, the first solenoid valve can be opened to introduce a small amount of fresh air to maintain positive pressure and air freshness in the workshop. The solenoid valves are automatically adjusted by the PLC controller based on humidity sensor data.

[0036] According to the actual application needs, such as Figure 1 As shown, the outlet end of the air supply duct 101 can be located at the top of the sterilization workshop 200 and connected to the air distribution vent 201 installed at the top of the sterilization workshop 200. The inlet end of the return air duct 102 is located at the bottom of the workshop and connected to the air intake vent 202 installed on the side wall of the sterilization workshop 200. This design utilizes the principle of hot air rising and cold air sinking, allowing moisture to accumulate at the bottom and be efficiently recovered. At the same time, the top air supply promotes uniform airflow distribution and avoids excessively high local humidity.

[0037] In some embodiments, such as Figure 1 As shown, the system is further equipped with an exhaust pipe 104 and an exhaust fan 105. The inlet end of the exhaust pipe 104 is connected to the downstream of the return air pipe 102 via a fourth solenoid valve 106, specifically between the third solenoid valve 103 and the second bypass valve 308.

[0038] In disinfection cycle mode, the third solenoid valve 103 is open and the fourth solenoid valve 106 is closed, and the system operates in full circulation to ensure that sterilizing agents such as VHP do not leak. In fresh air mode, both the third solenoid valve 103 and the fourth solenoid valve 106 are open, and the exhaust fan 105 is started to directly exhaust high-humidity air or residual sterilizing agents, accelerating the ventilation of the workshop.

[0039] In addition, a fifth solenoid valve 309 (not shown in the figure) is also included as needed. The fifth solenoid valve 309 is located on the return air duct between the first bypass valve 306 and the second bypass valve 308. When the bypass system is running, the fifth solenoid valve 309 is closed, and the forced airflow passes through the dehumidifier; when the bypass system stops, the fifth solenoid valve 309 is opened to restore normal air conditioning circulation.

[0040] In some of these embodiments, such as Figure 1As shown, this dual dehumidification system can be expanded to multiple sterilization workshops 200, each connected in parallel to the supply air duct 101 and return air duct 102 via branch pipes. Each workshop is equipped with an independent temperature and humidity sensor, and the PLC controller adjusts the operating parameters of the bypass dehumidification system 300 according to the needs of each workshop, achieving precise zoning control. For example, in a large pharmaceutical plant, different workshops can be sterilized alternately, with the system using valves to prioritize the treatment of high-humidity areas.

[0041] In some of these embodiments, such as Figure 2 As shown, a first bypass valve 306 is installed at the inlet end of the bypass intake pipe 305, and a second bypass valve 308 is installed at the outlet end of the bypass outlet pipe 307. During the dehumidification stage, the first bypass valve 306 and the second bypass valve 308 are open, and the fifth solenoid valve 309 is closed, allowing return air to flow through the bypass dehumidification system 300. During the non-dehumidification stage, all bypass valves are closed, the fifth solenoid valve 309 is opened, and the system resumes standard air conditioning operation. The dehumidifier body 301 is preferably a rotary dehumidifier, combined with the pre-cooling of the surface cooling dehumidification device 302 and the reheating of the heating device 303 to achieve efficient energy utilization.

[0042] Combination Figure 1 and Figure 2 As shown, the workflow of the VHP space sterilization dual dehumidification system in this workshop is as follows: (I) Initial stage: Open the first bypass valve 306 and the second bypass valve 308, close the fifth solenoid valve 309, and start the air conditioning system main unit 100 and the bypass dehumidification system 300 simultaneously to heat and dehumidify the workshop until the humidity is ≤30%RH. (II) Sterilization stage: Inject vaporized hydrogen peroxide into the VHP sterilizer, control the third solenoid valve 103 to open and the fourth solenoid valve 106 to close, maintain the system in full circulation mode, and the bypass dehumidification system 300 continues to run to prevent the humidity from rising and affecting the sterilization effect. (III) Ventilation stage: Close the first bypass valve 306 and the second bypass valve 308, control the bypass dehumidification system 300 to stop working, and simultaneously control the third solenoid valve 103 and the fourth solenoid valve 14 to open, switch to 100% fresh air mode, and run the exhaust fan 105 to quickly remove residual sterilizing agent. (IV) Recovery stage: The system returns to normal air conditioning mode to maintain the temperature and humidity required for workshop production.

[0043] This invention adds a bypass dehumidification system. The air inlet is connected to the upstream of the return air duct through a bypass air inlet pipe, and the air outlet is connected to the downstream of the return air duct through a bypass air outlet pipe. This allows for secondary drying and dehumidification of the ambient air in the sterilization workshop before it is sent back to the workshop via the air conditioning system, forming a dual dehumidification cycle. This dual dehumidification design overcomes the humidity control problems in old workshops and coastal areas. It is simple to modify and low in cost. In practical applications, it has been verified that it can increase the sterilization success rate to over 95%.

[0044] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0045] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0046] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A VHP space sterilization dual dehumidification system for workshop renovation, comprising an air conditioning system main unit (100) and a sterilization workshop (200), wherein the air conditioning system main unit (100) is connected to the sterilization workshop (200) through a supply air duct (101) and a return air duct (102) to form a circulation path; characterized in that: It also includes a bypass dehumidification system (300) installed on the return air duct (102), wherein: The air inlet of the bypass dehumidification system (300) is connected to the upstream pipeline of the return air pipeline (102) through the bypass air inlet pipe (305), and the air outlet is connected to the downstream pipeline of the return air pipeline (102) through the bypass air outlet pipe (307) so that the ambient air in the sterilization workshop (200) is dried and dehumidified and then sent back to the sterilization workshop (200) through the air conditioning system host (100).

2. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 1, characterized in that, The first air inlet of the air conditioning system host (100) is connected to the outdoor fresh air through a pipe and a first solenoid valve, and the second air inlet of the air conditioning system host (100) is connected to the outlet of the return air pipe (102) through a second solenoid valve.

3. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 1, characterized in that, The outlet end of the air supply duct (101) is connected to the top space of the sterilization workshop (200), and the inlet end of the return air duct (102) is connected to the bottom space of the sterilization workshop (200).

4. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 1, characterized in that, The air conditioning system host (100) also includes an exhaust pipe (104) and an exhaust fan (105). The inlet end of the exhaust pipe (104) is connected to the downstream pipe of the return air pipe (102) through a fourth solenoid valve (106), and the outlet end is connected to the exhaust fan (105).

5. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 4, characterized in that, A third solenoid valve (103) is installed on the downstream pipe of the return air duct (102), and the pipe between the third solenoid valve (103) and the second bypass valve (308) is connected to the inlet end of the discharge pipe (104).

6. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 5, characterized in that, The third solenoid valve (103) is normally closed, opens during disinfection cycle, and opens during fresh air operation; the fourth solenoid valve (106) is normally open, closes during disinfection cycle, and opens during fresh air operation.

7. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 1, characterized in that, The sterilization workshops (200) are multiple and arranged in parallel, and are respectively connected to the air supply duct (101) and the return air duct (102) through branch pipes; Each of the sterilization workshops (200) is provided with an air distribution port (201) connected to the air supply duct (101) at the top and an air intake port (202) connected to the return air duct (102) on the side wall.

8. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 1, characterized in that, The inlet end of the bypass intake pipe (305) is connected to the upstream pipe of the return air pipe (102) through the first bypass valve (306), and the outlet end of the bypass outlet pipe (307) is connected to the downstream pipe of the return air pipe (102) through the second bypass valve (308).

9. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 8, characterized in that, A fifth solenoid valve (309) is provided on the return air duct (102) between the first bypass valve (306) and the second bypass valve (308).

10. The workshop renovation VHP space sterilization and dehumidification dual system according to claim 1, characterized in that, The bypass dehumidification system (300) further includes a dehumidifier body (301), a surface cooling dehumidification device (302), a heating device (303), and a dehumidification fan (304) connected in sequence, wherein: The air inlet of the dehumidifier body (301) is connected to the outlet end of the bypass air inlet pipe (305), and the air outlet of the dehumidifier fan (304) is connected to the inlet end of the bypass air outlet pipe (307).

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