Central positive and negative pressure system for purification equipment

Abstract

The utility model discloses a central positive and negative pressure system for purifying equipment, which is characterized by comprising an external power control unit, a terminal working unit and an airflow pipeline connected between the external power control unit and the terminal working unit, the external power control unit comprises a plurality of box bodies, a filter and a positive pressure or negative pressure fan are arranged in each box body, and the positive pressure or negative pressure fan is connected with the external power control unit. One end of the box body is an air inlet or an air outlet, and the other end of the box body is an airflow inlet or an airflow outlet communicated with the airflow pipeline; the terminal working unit comprises a cabinet body, a high-efficiency filter and an airflow discharge system, the cabinet body is provided with at least one air port, and each air port is connected with the corresponding airflow pipeline. According to the utility model, the power control unit is externally arranged and is separated from the terminal working unit, so that no power system is arranged at the terminal, the mechanical noise is reduced, the control end is uniformly maintained, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to an air purification system device, in particular to a central positive and negative pressure system for a purification device. Background Art

[0002] Biological safety cabinets and clean benches are common purification devices in our laboratories. Appropriate purification devices are selected according to different uses. No matter which kind of purification device, it uses clean air flow to blow and keep the clean air in the area. Therefore, generally, a fan, a filter unit and a supply air duct need to be configured. Its working process is roughly as follows: air is collected, filtered and then sent into the device, and then the contaminated air discharged from the device is collected, filtered and then discharged or recycled for reuse.

[0003] In some occasions where multiple purification devices need to be used together, such as laboratories and hospital intravenous admixture centers, each purification device is an independent individual and includes the above basic components. The problems brought about are as follows:

[0004] 1. The clean equipment is equipped with high-power fans. When multiple devices are placed, the generated noise is quite significant, especially in places such as hospitals, which brings a lot of trouble.

[0005] 2. In occasions where multiple purification devices are used, the devices are often fixed, and the workload of equipment maintenance (such as replacing filters, fans, etc.) becomes larger and is relatively cumbersome.

[0006] 3. Due to the built-in fan, the purification efficiency of the clean equipment will be affected by the fan structure in terms of structure, and the equipment performance is affected to a certain extent.

[0007] Therefore, we need a purification system that can solve the above problems to meet the problem of centralized use of multiple purification devices. Summary of the Invention

[0008] The purpose of the utility model is to provide a central positive and negative pressure system for a clean device. By using this system, the power unit is centrally configured, the noise pollution is effectively reduced, and the unified maintenance is carried out, greatly reducing the daily use cost.

[0009] To achieve the above purpose, the technical solution adopted by the utility model is: a central positive and negative pressure system for a purification device, including an external power control unit, a terminal working unit, and an air flow pipeline connecting the two. Among them:

[0010] The external power control unit includes a plurality of boxes. Each box is provided with a filter and a positive pressure or a negative pressure fan. One end of the box is an air inlet or outlet, and the other end is an air flow inlet or outlet communicating with the air flow pipeline.

[0011] The terminal working unit includes a cabinet body, a high-efficiency filter, and an air flow discharge system. At least one air outlet is provided on the cabinet body, and each air outlet is connected to a corresponding air flow pipeline.

[0012] In the above technical solution, the terminal working unit is a clean bench. An air inlet is provided on the cabinet body, and the air inlet is connected to a positive pressure box where a positive pressure fan is located through the air flow pipeline. After the air flows into the cabinet body through the air inlet, the air purified by the high-efficiency filter is blown into the operation area, and then the air is discharged by the air flow discharge system.

[0013] A further technical solution is that the air flow discharge system includes a lower air outlet, and the clean air flow is discharged from the lower air outlet after passing through the operation area.

[0014] Another technical solution is that the terminal working unit is a biosafety cabinet. An air inlet and an air outlet are provided on the cabinet body. The air inlet is connected to a positive pressure box where a positive pressure fan is located through the air flow pipeline, and the air outlet is connected to a negative pressure box where a negative pressure fan is located through the air flow pipeline. After the air flows into the cabinet body through the air inlet, the air is purified by the high-efficiency filter and then blown into the operation area. Then the air enters the air flow discharge system and is discharged from the air outlet, and is centrally processed through the air flow pipeline into the negative pressure box.

[0015] A further technical solution is that the air flow discharge system includes a lower air outlet and an air flow channel inside the back side of the cabinet body. The clean air flow flows out from the lower air outlet after passing through the working area, enters the static pressure box through the air flow channel, and is discharged from the air outlet.

[0016] In the above technical solution, a pre-filter is provided at the air outlet of the positive pressure box with the positive pressure fan, and an exhaust high-efficiency filter is provided at the air inlet of the negative pressure box with the negative pressure fan.

[0017] In the above technical solution, a pressure regulating valve is respectively provided on each air flow pipeline.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] 1. In the utility model, by setting an external power control unit, power components such as fans that generate noise are isolated in the sound insulation area outside the terminal equipment, greatly improving the comfort of the use area, especially suitable for special occasions such as hospitals that are sensitive to noise.

[0020] 2. By centrally placing the external power control units of multiple purification devices, the equipment can be systematically and centrally maintained, greatly reducing the maintenance cost.

[0021] 3. The internal structure of the terminal device is simplified, only including some non-powered components such as a static pressure box and a high-efficiency filter, which is beneficial to the flow of the purified air and improves the purification efficiency. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 2 is a schematic connection diagram of a biological safety cabinet in an embodiment of the present utility model;

[0024] Figure 3 is a schematic structural diagram of a power control unit in an embodiment of the present utility model;

[0025] Figure 4 is a schematic connection diagram of a clean bench in an embodiment of the present utility model.

[0026] Among them: 1. External power control unit; 2. Terminal working unit; 3. Air flow pipeline; 4. Pressure regulating valve; 5. Box body; 6. Cabinet body; 7. High-efficiency filter; 8. Positive pressure fan; 9. Air outlet; 10. Prefilter; 11. Negative pressure fan; 12. Air inlet; 13. Exhaust high-efficiency filter; 14. Air inlet; 15. Operation area; 16. Exhaust port; 17. Static pressure box; 18. Expansion unit. Detailed Embodiment

[0027] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0028] Embodiment:

[0029] Refer to Figures 1 to 4 As shown, a central positive and negative pressure system for a purification device includes an external power control unit 1, a terminal working unit 2, and an air flow pipeline 3 connecting the two. A pressure regulating valve 4 is respectively provided on each air flow pipeline 3 to stabilize the pressure of the air flow in the air flow pipeline. Among them:

[0030] The external power control unit 1 includes a plurality of box bodies 5. A filter and a positive pressure or a negative pressure fan are provided in each box body 5. One end of the box body 5 is an air inlet or outlet, and the other end is an air flow inlet or outlet communicating with the air flow pipeline 3;

[0031] The terminal working unit 2 includes a cabinet body 6, a high-efficiency filter 7, and an air flow discharge system. At least one air outlet is provided on the cabinet body 6, and each air outlet is connected to the corresponding air flow pipeline 3.

[0032] In the positive pressure box with the positive pressure fan 8, a prefilter 10 is provided at the air outlet 9; in the negative pressure box with the negative pressure fan 11, an exhaust high-efficiency filter 13 is provided at the air inlet 12.

[0033] According to the differences of the terminal working unit 2, the externally connected power control unit 1 is adjusted accordingly:

[0034] 1. The terminal working unit 2 is a clean bench. As Figure 4 shown, an air inlet 14 is provided on the cabinet body 6. The air inlet 14 is connected to the positive pressure box where the positive pressure fan 8 is located through the air flow pipeline 3. After the air flows into the cabinet body 6 through the air inlet 14, the purified air flow passes through the high-efficiency filter 7 and blows into the operation area 15, and then enters the air flow discharge system and is discharged. The air flow discharge system can be a lower exhaust port. To ensure that the discharged air flow is pollution-free, a primary filter can also be provided at the lower exhaust port to improve the safety of the external exhaust air.

[0035] 2. The terminal working unit 2 is a biosafety cabinet. As Figures 2 - 3 shown, an air inlet 14 and an exhaust port 16 are provided on the cabinet body 6. The air inlet 14 is connected to the positive pressure box where the positive pressure fan 8 is located through the air flow pipeline 3. The exhaust port 16 is connected to the negative pressure box where the negative pressure fan 11 is located through the air flow pipeline 3. After the air flows into the cabinet through the air inlet 14, the purified air flow passes through the high-efficiency filter 7 and blows into the operation area 15, and then the contaminated air flow enters the air flow discharge system and is discharged from the exhaust port 16, and enters the negative pressure box through the air flow pipeline 3 for centralized treatment.

[0036] Here, the air flow discharge system includes a lower air outlet and an air flow channel inside the back side of the cabinet body. The clean air flow flows out from the lower air outlet after passing through the working area, enters the static pressure box 17 through the air flow channel, and is discharged from the exhaust port 16. Since the air flow discharged from the biosafety cabinet may contain harmful components such as infectious aerosols, it needs to be centrally treated before being discharged to the outside. In this embodiment, the air flow discharged from the biosafety cabinet is sucked into the negative pressure box by the negative pressure fan for unified treatment.

[0037] In the present utility model, the externally connected power control unit 1 is centrally configured according to the number and uses of the terminal working units 2, which is not limited to the number and quantity shown in the drawings of this application, and the corresponding quantity can be expanded. An expansion unit 18 can be configured inside the externally connected power control unit for subsequent use.

Claims

1. A central positive and negative pressure system for purification equipment, characterized in that: It includes an external power control unit, a terminal working unit and an airflow duct connecting the two, wherein: The external power control unit includes a plurality of boxes, each of which is provided with a filter and a positive pressure or a negative pressure fan, one end of the box is an air inlet or outlet, and the other end is an air inlet or outlet connected to the air flow duct; The terminal working unit comprises a cabinet, a high-efficiency filter and an airflow exhaust system. The cabinet is provided with at least one air outlet, and each of the air outlets is connected to the corresponding airflow duct.

2. The central positive and negative pressure system for purification equipment according to claim 1, characterized in that: The terminal working unit is a clean workbench, and an air inlet is provided on the cabinet. The air inlet is connected to the positive pressure box where the positive pressure fan is located through the air flow duct. After the air flow flows into the cabinet through the air inlet, the air flow purified by the high-efficiency filter is blown into the operating area, and then the air flow is discharged by the air flow exhaust system.

3. The central positive and negative pressure system for purification equipment according to claim 2, characterized in that: The airflow discharge system comprises a lower air outlet, and the clean airflow is discharged from the lower air outlet after passing through the operation area.

4. The central positive and negative pressure system for purification equipment according to claim 1, characterized in that: The terminal working unit is a biological safety cabinet, and an air inlet and an air exhaust port are provided on the cabinet. The air inlet is connected to the positive pressure box where the positive pressure fan is located via the air flow duct, and the air exhaust port is connected to the negative pressure box where the negative pressure fan is located via the air flow duct. After the air flow flows into the cabinet through the air inlet and is purified by the high-efficiency filter, the air flow is blown into the operating area, and then the air flow enters the air flow exhaust system, is discharged from the air exhaust port, and enters the negative pressure box through the air flow duct for centralized treatment.

5. The central positive and negative pressure system for purification equipment according to claim 4, characterized in that: The airflow discharge system includes a lower air outlet and an airflow channel inside the back side of the cabinet. The clean airflow flows out from the lower air outlet after passing through the working area, enters the static pressure box through the airflow channel, and is discharged from the exhaust port.

6. The central positive and negative pressure system for purification equipment according to claim 1, characterized in that: In the positive pressure box with the positive pressure fan, a pre-filter is provided at the air outlet; in the negative pressure box with the negative pressure fan, an exhaust high efficiency filter is provided at the air inlet.

7. The central positive and negative pressure system for purification equipment according to claim 1, characterized in that: Each of the air flow pipelines is respectively provided with a pressure regulating valve.

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