Air sterilization and purification workshop

Abstract

The utility model discloses an air sterilization and purification workshop. The air sterilization and purification workshop comprises a workshop body, a high-efficiency filter, ventilation equipment, a PLC (Programmable Logic Controller) and two groups of ozone generators, by optimizing a ventilation structure and a sterilization process, low-concentration continuous sterilization can be carried out in a non-stop production period, the problem that the traditional ozone sterilization must be stopped at night is solved, the production continuity is ensured, and meanwhile, a dual purification structure of ozone sterilization and high-efficiency filter filtration is integrated, and ventilation equipment is combined, so that the production efficiency is improved. Instant response can be made to sudden microbial contamination events, and the defects that an original system is long in sterilization period and cannot deal with emergency situations are overcome.

Description

Technical Field

[0001] This utility model relates to the field of cleanroom technology, and in particular to an air sterilization and purification workshop. Background Technology

[0002] Currently, some industries with high environmental requirements use cleanrooms in their production processes. Cleanrooms can remove dust, microorganisms, and other contaminants from the workshop, and are widely used, especially in industries such as pharmaceuticals, food, and electronics, which have high requirements for air cleanliness and microbial content.

[0003] Existing technology discloses a local ventilation integrated main pipe system for cleanrooms, relating to the field of cleanroom technology. The system includes a cleanroom with an exhaust pipe inserted through one side and a ventilation mechanism installed at the top. The ventilation mechanism includes a purification box, an ozone generator, and a cooling pipe. In this technology, air passes through a first filter plate and a second filter plate in sequence to achieve dual filtration. The use of ultraviolet disinfection lamps and an ozone generator enhances the sterilization effect on the air, ensuring the cleanliness of the cleanroom interior.

[0004] However, other existing cleanrooms, including the technologies mentioned above, often face limitations in operating time when ozone generators are used for sterilization because ozone is highly irritating to the human respiratory tract. Existing technologies typically require operation during nighttime shutdown periods, resulting in long sterilization cycles (usually ≥8 hours) and an inability to cope with sudden pollution. Therefore, it is necessary to improve their structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an air sterilization and purification workshop.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an air sterilization and purification workshop, comprising a workshop body, a high-efficiency filter, ventilation equipment, a PLC controller, and two sets of ozone generators. The ventilation equipment consists of an exhaust unit for drawing air from the workshop body and an air supply unit for supplying air into the workshop body. The high-efficiency filter is disposed inside the air supply unit. Two sets of disinfection chambers are disposed at the outlet end of the exhaust unit. The two sets of ozone generators are respectively disposed on the upper wall of one set of disinfection chambers. A variable frequency compressor is disposed on the side of the two sets of disinfection chambers away from the exhaust unit. Two sets of compression tanks are disposed on the side of the variable frequency compressor away from the disinfection chamber. The side of the two sets of compression tanks away from the variable frequency compressor is connected to the air supply unit. A decomposition structure for accelerating ozone decomposition is disposed inside the compression tank. A pressure detection structure for monitoring the pressure inside the tank is disposed on the outer wall of the compression tank.

[0007] As a further description of the above technical solution:

[0008] The decomposition structure is a catalytic decomposition layer, which is fixedly connected to the inner wall of the compression tank.

[0009] As a further description of the above technical solution:

[0010] The pressure detection structure is a pressure sensor, which is installed on the outer wall of the compression tank.

[0011] As a further description of the above technical solution:

[0012] The exhaust unit is connected to the two disinfection chambers via a first reversing valve, and the passage between the exhaust unit and the two disinfection chambers is switched via the first reversing valve.

[0013] As a further description of the above technical solution:

[0014] The two disinfection chambers are connected to the variable frequency compressor via a second reversing valve, and the passage between the variable frequency compressor and the two disinfection chambers is switched via the second reversing valve.

[0015] As a further description of the above technical solution:

[0016] The variable frequency compressor is connected to the two sets of compression tanks via a third reversing valve, and the passage between the variable frequency compressor and the two sets of compression tanks is switched via the third reversing valve.

[0017] As a further description of the above technical solution:

[0018] An ozone concentration sensor is installed between the compression tank and the air supply unit.

[0019] This utility model has the following beneficial effects:

[0020] Compared with existing technologies, this air sterilization and purification workshop, through optimized ventilation structure and sterilization process, can carry out low-concentration continuous sterilization during non-shutdown periods, solving the pain point of traditional ozone sterilization requiring nighttime shutdown and ensuring production continuity. At the same time, it integrates a dual purification structure of ozone sterilization and high-efficiency filter filtration, combined with ventilation equipment, which can respond immediately to sudden microbial contamination events, overcoming the shortcomings of the original system that has a long sterilization cycle and cannot cope with emergencies. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an air sterilization and purification workshop proposed in this utility model;

[0022] Figure 2 This utility model proposes an air sterilization and purification workshop. Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3This is a partial cross-sectional view of the internal structure of the compression tank in an air sterilization and purification workshop proposed in this utility model.

[0024] Legend:

[0025] 1. Exhaust unit; 2. Air supply unit; 3. First reversing valve; 4. Disinfection chamber; 5. Second reversing valve; 6. Variable frequency compressor; 7. Third reversing valve; 8. Compression tank; 9. Ozone concentration sensor; 10. Pressure sensor; 11. Catalytic decomposition layer; 12. Ozone generator. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1 to 3 The present invention provides an air sterilization and purification workshop, comprising a workshop body, a high-efficiency filter, ventilation equipment, a PLC controller, and two sets of ozone generators 12;

[0028] In order to achieve the functions of air circulation and pre-filtration in the workshop, the ventilation equipment consists of an exhaust unit 1 for drawing air from the workshop body and an air supply unit 2 for supplying air into the workshop body. The high-efficiency filter is installed inside the air supply unit 2.

[0029] The exhaust unit 1 continuously draws dusty air from the workshop, while the supply unit 2 delivers clean air through a high-efficiency filter, forming a basic airflow circulation path.

[0030] In order to achieve uninterrupted alternating sterilization operation, two sets of disinfection chambers 4 are set at the outlet end of the exhaust unit 1. The exhaust unit 1 and the two sets of disinfection chambers 4 are connected through the first reversing valve 3, and the passage between the exhaust unit 1 and the two sets of disinfection chambers 4 is switched through the first reversing valve 3.

[0031] The two disinfection chambers 4 are disinfection chamber 4a and disinfection chamber 4b respectively. When the first reversing valve 3 opens the disinfection chamber 4a, the exhaust unit 1 delivers the workshop air to the disinfection chamber 4a. At the same time, the disinfection chamber 4b is in a closed standby state. The two disinfection chambers 4 are physically isolated by switching through the first reversing valve 3.

[0032] To achieve precise ozone mixing and control, two sets of ozone generators 12 are respectively installed on the upper wall of one disinfection chamber 4.

[0033] The two sets of ozone generators 12 are ozone generator 12a and ozone generator 12b, respectively. The ozone generator 12 directly injects ozone gas into the disinfection chamber 4 and uses its strong oxidizing properties to kill microorganisms in the air.

[0034] In order to achieve directional transmission of high-pressure gas, a variable frequency compressor 6 is installed on the side of the two disinfection chambers 4 away from the exhaust unit 1. The two disinfection chambers 4 and the variable frequency compressor 6 are connected through a second reversing valve 5. The passage between the variable frequency compressor 6 and the two disinfection chambers 4 is switched through the second reversing valve 5.

[0035] After the sterilization chamber 4a completes 10 minutes of sterilization, the second reversing valve 5 switches the conduction of the sterilization chamber 4a passage, and the variable frequency compressor 6 delivers ozone-containing air to the compression tank 8 at a pressure of 0.35MPa.

[0036] In order to achieve ozone pressurized degradation treatment, two sets of compression tanks 8 are set on the side of the variable frequency compressor 6 away from the disinfection chamber 4. The variable frequency compressor 6 is connected to the two sets of compression tanks 8 through a third reversing valve 7, and the passage between the variable frequency compressor 6 and the two sets of compression tanks 8 is switched through the third reversing valve 7.

[0037] The two sets of compression tanks 8 are compression tank 8a and compression tank 8b, respectively. After receiving ozone-containing air, the compression tank 8 maintains a pressure environment of 0.3-0.5MPa through the pressure sensor 10, so that the ozone half-life is shortened to 40% of that under normal atmospheric pressure.

[0038] In order to achieve safe return air intelligent control, the two sets of compression tanks 8 are connected to the air supply unit 2 on the side away from the variable frequency compressor 6. An ozone concentration sensor 9 is installed between the compression tank 8 and the air supply unit 2.

[0039] When the ozone concentration sensor 9 detects that the ozone concentration of the gas at the outlet of the compressor tank 8 is ≤0.1ppm, the air supply unit 2 automatically opens the corresponding pipeline air valve to strictly prevent excessive ozone from being returned to the workshop.

[0040] In order to achieve accelerated ozone decomposition, the compression tank 8 is equipped with a decomposition structure for accelerating ozone decomposition. The decomposition structure is a catalytic decomposition layer 11, which is fixedly connected to the inner wall of the compression tank 8.

[0041] The catalytic decomposition layer 11 uses a manganese-copper oxide composite commonly used in existing technologies, which increases the ozone decomposition efficiency to 3.2 times that of natural decay under a pressure of 0.3 MPa, and can maintain catalytic activity at a low temperature of 25℃.

[0042] In order to achieve dynamic control of the pressure environment, a pressure detection structure for monitoring the pressure inside the tank is provided on the outer wall of the compression tank 8. The pressure detection structure is a pressure sensor 10, which is located on the outer wall of the compression tank 8.

[0043] The pressure sensor 10 detects the pressure value inside the compression tank 8 to ensure that the pressure environment is stable within the optimal ozone decomposition range.

[0044] Working principle: When exhaust unit 1 draws air from the workshop, air supply unit 2 returns clean air through a high-efficiency filter, forming a basic airflow circulation. The dual disinfection chamber structure is designed to achieve uninterrupted sterilization operations. Disinfection chambers 4a and 4b are connected in parallel at the outlet of exhaust unit 1, and the airflow path is switched by the first reversing valve 3. When the first reversing valve 3 opens the disinfection chamber 4a, the ozone generator 12a starts and injects ozone; simultaneously, the disinfection chamber 4b is in standby mode, achieving physical isolation between the two systems. A variable frequency compressor 6 is installed at the outlet of disinfection chambers 4a / 4b. The gas source is selected via the second reversing valve 5. The variable frequency compressor 6 pressurizes the ozone mixture to 0.35 MPa, and then distributes it to compression tanks 8a or 8b via the third reversing valve 7. The pressure sensor 10 monitors the pressure inside the tank in real time, automatically releasing pressure when the limit is exceeded. A catalytic decomposition layer 11 (manganese-copper oxide composite coating) is installed on the inner wall of compression tanks 8a / 8b. After maintaining a 30-minute residence time, the ozone concentration is detected by the ozone concentration sensor 9 and, once it meets the standard, it is returned to the workshop via the air supply unit 2. The two sets of compression tanks work alternately to ensure continuous degradation and transportation.

[0045] The timing control logic PLC controller automatically switches according to the following cycles:

[0046] 0-10 minutes: Sterilization in the disinfection chamber (4a) + degradation in the compression tank (8b);

[0047] 10-20 minutes: Sterilization in the disinfection chamber (4b) + degradation in the compression tank (8a);

[0048] Through the coordinated action of three sets of reversing valves, a complete closed loop of "sterilization-degradation-filtration-return" is formed.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. An air sterilization and purification workshop, characterized in that: The system includes a workshop body, a high-efficiency filter, ventilation equipment, a PLC controller, and two sets of ozone generators (12). The ventilation equipment consists of an exhaust unit (1) for drawing air from the workshop body and an air supply unit (2) for supplying air into the workshop body. The high-efficiency filter is installed inside the air supply unit (2). Two sets of disinfection chambers (4) are installed at the outlet end of the exhaust unit (1). The two sets of ozone generators (12) are respectively installed on the upper wall of one set of disinfection chambers (4). A variable frequency compressor (6) is installed on the side of the two sets of disinfection chambers (4) away from the exhaust unit (1). Two sets of compression tanks (8) are installed on the side of the variable frequency compressor (6) away from the disinfection chamber (4). The side of the two sets of compression tanks (8) away from the variable frequency compressor (6) is connected to the air supply unit (2). The compression tank (8) is provided with a decomposition structure for accelerating ozone decomposition. The outer wall of the compression tank (8) is provided with a pressure detection structure for monitoring the pressure inside the tank.

2. The air sterilization and purification workshop according to claim 1, characterized in that: The decomposition structure is a catalytic decomposition layer (11), which is fixedly connected to the inner wall of the compression tank (8).

3. The air sterilization and purification workshop according to claim 2, characterized in that: The pressure detection structure is a pressure sensor (10), which is installed on the outer wall of the compression tank (8).

4. The air sterilization and purification workshop according to claim 3, characterized in that: The exhaust unit (1) is connected to the two disinfection chambers (4) via a first reversing valve (3), and the passage between the exhaust unit (1) and the two disinfection chambers (4) is switched via the first reversing valve (3).

5. The air sterilization and purification workshop according to claim 4, characterized in that: The two disinfection chambers (4) are connected to the variable frequency compressor (6) through a second reversing valve (5), and the passage between the variable frequency compressor (6) and the two disinfection chambers (4) is switched through the second reversing valve (5).

6. The air sterilization and purification workshop according to claim 5, characterized in that: The variable frequency compressor (6) is connected to the two sets of compression tanks (8) through a third reversing valve (7), and the passage between the variable frequency compressor (6) and the two sets of compression tanks (8) is switched through the third reversing valve (7).

7. An air sterilization and purification workshop according to claim 6, characterized in that: An ozone concentration sensor (9) is installed between the compression tank (8) and the air supply unit (2).

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