A delivery window with positive pressure protection function

Abstract

The utility model discloses a delivery window with positive pressure protection function, including box, the inner chamber of setting in the box and respectively install in the door board of inner chamber front and back, still include: pressure regulating system for maintaining the positive pressure state of inner chamber relative to external environment, airflow control module is used to switch between the self -circulation state and the positive pressure protection state to control the airflow path of inner chamber. The application not only has the protection means of traditional delivery window such as double -door interlock, self -purification circulation, still is provided with positive pressure protection function, can completely avoid the cross -contamination of material, prolongs the service life of high -efficient filter in delivery window.

Description

Technical Field

[0001] This utility model relates to the field of cleanroom engineering equipment technology, specifically to a transfer window with positive pressure protection function. Background Technology

[0002] Traditional pass-through windows use double-door interlocking and self-cleaning systems to prevent direct airflow between the rooms on either side. However, this also has drawbacks, such as allowing low-cleanliness airflow to enter, increasing the purification load on the pass-through window and shortening its lifespan. Furthermore, insufficient cleaning capacity can lead to material residue contamination in the next pass-through. Utility Model Content

[0003] The purpose of this invention is to provide a transfer window with positive pressure protection function, in order to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A transfer window with positive pressure protection includes a housing, an inner cavity disposed within the housing, and door panels respectively installed on the front and back of the inner cavity, and further includes:

[0006] A pressure regulation system is used to maintain a positive pressure state of the internal cavity relative to the external environment;

[0007] An airflow control module is used to switch between a self-circulation state and a positive pressure protection state to control the airflow path of the inner cavity.

[0008] In some embodiments, the pressure regulation system includes an air supply unit and an air exhaust unit, wherein the air supply unit and the air exhaust unit adjust the difference between the air supply volume and the air exhaust volume through an air volume control component to maintain the pressure of the inner cavity stable.

[0009] In some embodiments, the airflow control module includes a self-circulating air duct and an electric valve group, the electric valve group switching the on / off of air supply, exhaust and self-circulating airflow according to the working state.

[0010] In some embodiments, the air supply unit includes:

[0011] An air supply channel is provided on the side of the inner cavity;

[0012] The constant air volume valve is connected to the air supply channel via an electric air supply valve.

[0013] In some embodiments, the exhaust unit includes:

[0014] An exhaust duct is located on the side of the inner cavity;

[0015] The exhaust variable air volume valve is connected to the exhaust duct via an exhaust electric valve;

[0016] The constant air volume valve for supply air and the variable air volume valve for exhaust air work together to maintain the positive pressure in the inner cavity by adjusting the difference between the supply air volume and the exhaust air volume.

[0017] In some embodiments, the airflow control module further includes:

[0018] A centrifugal fan is installed on the upper side of the housing;

[0019] A high-efficiency filter is installed on the outlet side of the centrifugal fan;

[0020] A flow equalization plate is located downstream of the high-efficiency filter;

[0021] The self-circulating air duct connects the air outlet and air inlet of the centrifugal fan, forming a closed-loop circulation path.

[0022] In some embodiments, the electric valve assembly includes a supply air electric valve, an exhaust air electric valve, and a recirculation air electric valve, wherein:

[0023] In self-circulation mode, the circulating air electric valve is open, the supply air electric valve and the exhaust air electric valve are closed, and the centrifugal fan drives the airflow through the high-efficiency filter and the uniform flow plate into the self-circulating air duct.

[0024] Under positive pressure protection, the circulating air electric valve is closed, while the supply air electric valve and the exhaust air electric valve are open. External clean air enters the inner cavity through the supply air constant volume valve and is discharged through the exhaust air variable volume valve.

[0025] In some embodiments, it also includes:

[0026] A high-efficiency differential pressure gauge is installed on the front of the housing to monitor the differential pressure of the high-efficiency filter.

[0027] A differential pressure gauge is installed on the back of the enclosure to monitor the pressure difference between the inner cavity and the external environment.

[0028] A control panel is located on both sides of the housing and is used to control the start and stop of the electric valve assembly and the centrifugal fan.

[0029] In some embodiments, the inner cavity is further provided with an external air supply flange and an external air exhaust flange, which are respectively connected to the constant air volume valve for air supply and the variable air volume valve for air exhaust via air ducts.

[0030] The beneficial effects that a transfer window with positive pressure protection function disclosed in this application may bring include, but are not limited to:

[0031] Reliable positive pressure maintenance: By controlling the difference between the constant air volume valve and the variable air volume valve, the internal cavity pressure can be kept stable even when the door is open, preventing external contaminants from seeping in.

[0032] Reduce residual contamination: The self-circulation mode thoroughly purifies the inner cavity, and combined with the positive pressure protection function, it eliminates the risk of cross-contamination of materials.

[0033] Extend equipment life: Dynamic pressure regulation reduces the load on the HEPA filter, extending its replacement cycle. Attached Figure Description

[0034] Figure 1 This is the front view of the present invention.

[0035] Figure 2 for Figure 1 AA schematic diagram (with constant air volume valve for supply air and variable air volume valve for exhaust air).

[0036] Figure 3 This is a rear view of the present invention.

[0037] Figure 4 This is a top view of the present invention.

[0038] Figure 5 for Figure 1 A schematic diagram of BB. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0040] Conversely, this application covers any substitutions, modifications, equivalent methods, and schemes made within the spirit and scope of this application as defined in the claims. Furthermore, to provide the public with a better understanding of this application, certain specific details are described in detail below. However, this application can be fully understood by those skilled in the art even without these detailed descriptions.

[0041] like Figure 1-5 As shown, the present invention provides a transfer window with positive pressure protection function, comprising: a housing 1, an inner cavity 2, a door panel 3, a centrifugal fan 4, a high-efficiency filter 5, a flow equalization plate 6, a side cavity air supply channel 7, a side cavity air exhaust channel 8, a self-circulating air duct 9, an air supply electric valve 10, an exhaust electric valve 11, a circulating air electric valve 12, an external air supply flange 13, an external exhaust flange 14, an air supply constant volume valve 15, an exhaust variable volume valve 16, a high-efficiency differential pressure gauge 17, a chamber differential pressure gauge 18, and a control panel 19.

[0042] The basic structure is as follows: The inner cavity 2 is located below the casing 1. Door panels 3 are installed on the front and back of the inner cavity. A centrifugal fan 4, a high-efficiency filter 5, and a flow equalization plate 6 are installed on the upper side of the transfer window. The inner cavity 2 has a side cavity air supply channel 7, a side cavity exhaust channel 8, and a self-circulating air duct 9. An electric air supply valve 10 is installed on the side cavity air supply channel 7, which is then connected to a circular air duct with an external air supply flange 13, and further connected to an air supply constant volume valve 15 via the air duct. An electric exhaust valve 11 is installed on the side cavity exhaust channel 8, which is then connected to a circular air duct with an external exhaust flange 14, and further connected to an exhaust variable air volume valve 16 via the air duct. A circulating air electric valve is installed on the circulating air duct 9. A high-efficiency differential pressure gauge 17 for detecting the high-efficiency filter is installed on the front of the transfer window, and a chamber differential pressure gauge 18 for detecting the internal cavity relative to the external environment is installed on the back of the transfer window. Control panels 19 are installed on both sides of the transfer window.

[0043] In self-circulation mode: Start via control panel 19, close air supply electric valve 10 and exhaust electric valve 11, open circulation electric valve 12, centrifugal fan 4 runs, air passes through centrifugal fan 4, high efficiency filter 5, uniform flow plate 6, then through self-circulation air duct 9 and circulation electric valve 12 and returns to centrifugal fan 4, forming circulation air duct.

[0044] In positive pressure protection mode: When transferring items, open the supply air electric valve 10 and exhaust air electric valve 11, close the recirculating air electric valve 12, and stop the centrifugal fan 4. Clean air from the air conditioning system is delivered to the inner cavity 2 through the air duct via the supply air constant volume valve, supply air electric valve 10, and side cavity supply air channel 7; air from the inner cavity 2 is delivered to the air conditioning system exhaust duct via the side cavity exhaust air channel 8, exhaust air electric valve 11, and exhaust air variable volume valve. The variable volume valve control system adjusts the supply air volume to ensure that the difference between the supply air volume and the exhaust air volume remains constant, even when the transfer window is open.

[0045] The new positive pressure protection function of the pass-through window ensures more reliable cleanliness of the passed items;

[0046] Using a constant air volume valve for air supply and a variable air volume valve for air return, the pressure inside the transfer window can be kept stable even when the door is open, and this mode has higher reliability.

[0047] 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 and improvements 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 transfer window with positive pressure protection function, comprising a housing (1), an inner cavity (2) disposed within the housing (1), and door panels (3) respectively installed on the front and back of the inner cavity (2), characterized in that, Also includes: A pressure regulation system is used to maintain a positive pressure state of the cavity (2) relative to the external environment; An airflow control module is used to switch between a self-circulation state and a positive pressure protection state to control the airflow path of the inner cavity (2).

2. The transfer window according to claim 1, characterized in that, The pressure regulation system includes an air supply unit and an air exhaust unit. The air supply unit and the air exhaust unit adjust the difference between the air supply volume and the air exhaust volume through an air volume control component to maintain the pressure stability of the inner cavity (2).

3. The transfer window according to claim 2, characterized in that, The airflow control module includes a self-circulating air duct (9) and an electric valve group, which switches the on / off state of air supply, exhaust and self-circulating airflow according to the working status.

4. The transfer window according to claim 3, characterized in that, The air supply unit includes: An air supply channel (7) is provided on the side of the inner cavity (2); The constant air volume valve (15) is connected to the air supply channel (7) via the electric air supply valve (10).

5. The transfer window according to claim 4, characterized in that, The exhaust unit includes: An exhaust duct (8) is provided on the side of the inner cavity (2); The exhaust variable air volume valve (16) is connected to the exhaust channel (8) via the exhaust electric valve (11); The constant air volume valve (15) and the variable air volume valve (16) work together to maintain the positive pressure of the inner cavity (2) by adjusting the difference between the air supply volume and the exhaust volume.

6. The transfer window according to claim 5, characterized in that, The airflow control module also includes: Centrifugal fan (4) is installed on the upper side of the housing (1); A high-efficiency filter (5) is installed on the outlet side of the centrifugal fan (4); The flow equalization plate (6) is located downstream of the high-efficiency filter (5); The self-circulating air duct (9) connects the air outlet and air inlet of the centrifugal fan (4) to form a closed loop path.

7. The transfer window according to claim 6, characterized in that, The electric valve assembly includes an air supply electric valve (10), an exhaust electric valve (11), and a recirculating air electric valve (12), wherein: In the self-circulation state, the circulating air electric valve (12) is opened, the air supply electric valve (10) and the exhaust electric valve (11) are closed, and the centrifugal fan (4) drives the airflow through the high-efficiency filter (5) and the uniform flow plate (6) into the self-circulation air duct (9). Under positive pressure protection, the circulating air electric valve (12) is closed, the supply air electric valve (10) and the exhaust air electric valve (11) are opened, and the external clean air enters the inner cavity (2) through the supply air constant volume valve (15) and is discharged through the exhaust air variable volume valve (16).

8. The transfer window according to claim 7, characterized in that, Also includes: A high-efficiency differential pressure gauge (17) is installed on the front of the housing (1) to monitor the differential pressure of the high-efficiency filter (5); A differential pressure gauge (18) is installed on the back of the housing (1) to monitor the pressure difference between the inner cavity (2) and the external environment; The control panel (19) is located on both sides of the housing (1) and is used to control the start and stop of the electric valve group and the centrifugal fan (4).

9. The transfer window according to claim 5, characterized in that, The inner cavity (2) is also provided with an external air supply flange (13) and an external air exhaust flange (14) on its side, which are respectively connected to the air supply constant volume valve (15) and the air exhaust variable volume valve (16) through air ducts.

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