A device for detecting the pressure difference between the inside and outside of a clean room

Abstract

The utility model discloses an inside and outside pressure difference detection device for clean room, including wall body and operating box, operating box fixed mounting at one side of wall body, and the inside of operating box is provided with installation cavity, and the top wall and bottom wall of installation cavity inside all are fixedly installed with pressure sensor, and the top of top filter box is fixedly installed with indoor pressure acquisition connector and is penetrated, and the inside of wall body is fixedly installed with outdoor pressure acquisition connector and is penetrated, and the bottom of bottom filter box is fixedly installed with connecting pipe and is penetrated, and connecting pipe and outdoor pressure acquisition connector are fixed through connecting component between. This inside and outside pressure difference detection device for clean room, when using, through the outdoor pressure acquisition connector of penetrating installation in the preset position, again through bolt and fix operating box in the side close to outdoor pressure acquisition connector, through the connecting component of setting, the outdoor pressure acquisition connector and connecting pipe are fixed quickly, and the time and labor are saved, and the use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of cleanroom environmental monitoring technology, and in particular to a device for detecting the pressure difference between the inside and outside of a cleanroom. Background Technology

[0002] A cleanroom is a well-sealed space where parameters such as air cleanliness, temperature, humidity, pressure, and noise are controlled as needed. The core function of pressure difference monitoring inside and outside a cleanroom is to maintain the cleanliness level and ensure production safety. Positive pressure difference (e.g., between a clean area and a non-clean area) prevents external contaminants from entering and ensures unidirectional airflow; negative pressure difference (e.g., in biosafety laboratories) prevents the leakage of harmful substances from inside. Pressure difference monitoring provides real-time feedback on HEPA filter clogging, door / window sealing failures, or air conditioning system malfunctions, preventing cross-contamination or excessive particulate matter due to pressure imbalance. For example, semiconductor workshops need to maintain a positive pressure of +15 Pa or higher to prevent dust from affecting chip yield, while pressure difference fluctuations exceeding ±5% in pharmaceutical sterile rooms require immediate adjustment. Furthermore, pressure difference data is a key parameter for GMP / ISO certification; continuous recording allows for traceability of the cleanroom's operating status, providing a basis for equipment maintenance and process improvement. Existing fixed electronic differential pressure sensors typically require complex wiring, are inconvenient to install and maintain, and have relatively high costs. The sensor probes are exposed to airflow and are easily contaminated or damaged, making them inconvenient to use. To address these issues, we have introduced a differential pressure detection device for cleanrooms. Utility Model Content

[0003] This utility model discloses a device for detecting the internal and external pressure difference in cleanrooms, aiming to solve the technical problems of existing fixed electronic differential pressure sensors, which usually require complex wiring, are inconvenient to install and maintain, have relatively high costs, and whose sensor probes are easily contaminated or damaged when exposed to airflow, making them inconvenient to use.

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

[0005] A device for detecting the internal and external pressure difference in a cleanroom includes a wall and an operating box. The operating box is fixedly installed on one side of the wall. An installation cavity is formed inside the operating box. Pressure sensors are fixedly installed on the top and bottom walls of the installation cavity. Filter boxes are fixedly installed on the top and bottom of the operating box, close to the corresponding pressure sensors. A processor is fixedly installed inside the installation cavity, between the two filter boxes. An indoor pressure acquisition pipe is fixedly installed through the top of the filter box. An outdoor pressure acquisition pipe is fixedly installed through the inside of the wall. A connecting pipe is fixedly installed through the bottom of the filter box. The connecting pipe is fixed to the outdoor pressure acquisition pipe by a connecting component.

[0006] In use, the outdoor pressure acquisition pipe is installed through the preset position, and the operation box is fixed to the side near the outdoor pressure acquisition pipe with bolts. The set connection components make it easy to quickly connect and fix the outdoor pressure acquisition pipe and the connecting pipe, saving time and effort and making it more convenient to use. It solves the technical problems of existing fixed electronic differential pressure sensors, which usually require complex wiring, are inconvenient to install and maintain, have relatively high costs, and whose sensor probes are easily contaminated or damaged when exposed to airflow, making them inconvenient to use.

[0007] In a preferred embodiment, the connecting assembly includes a mounting base, which is fixedly installed on the outside of the outdoor pressure acquisition connector and near the end of the control box. A first connecting base is fixedly installed on the side of the outdoor pressure acquisition connector near the connecting pipe, and a second connecting base is fixedly installed on the side of the connecting pipe near the first connecting base. Positioning bases are symmetrically connected to the mounting base near the connection between the outdoor pressure acquisition connector and the connecting pipe via a movable component. Positioning grooves are provided on the side of each positioning base near the first and second connecting bases. Movable grooves are correspondingly provided inside each positioning base on the side near the connecting pipe. Positioning elements are slidably connected inside each movable groove. A second threaded rod is threadedly connected to one side of each positioning base. The end of the second threaded rod near the positioning element extends into the positioning element and is rotatably connected to it. A positioning groove is provided on the side of the second connecting base near the positioning element, and the positioning element extends into the positioning groove.

[0008] By setting up connecting components, the moving components drive the positioning seat to move towards the first and second connecting seats, and then rotate the second threaded rod to drive the positioning part to move towards the corresponding positioning groove, making the connection between the second connecting seat and the first connecting seat tighter, and the connection convenient and quick.

[0009] In a preferred embodiment, the movable component includes a first slide groove. A first slide groove is symmetrically formed on the side of the mounting base near the positioning seat. A first slider is slidably connected inside each first slide groove. A first threaded rod is symmetrically threaded inside the mounting base. The end of the first threaded rod near the first slider extends into the first slider and is rotatably connected to it. The end of the first slider near the positioning seat is fixedly connected to the corresponding positioning seat. A second slide groove is formed inside the mounting base near the first slide groove. A second slider is slidably connected inside the second slide groove. The side of the second slider near the first slider is fixedly connected to the corresponding first slider.

[0010] By rotating the first threaded rod through the set moving component, the first slider is pushed to move the positioning seat towards the second connecting seat and the first connecting seat. The second slide groove and the second slider are set to enhance the stability of the movement of the first slider.

[0011] In a preferred embodiment, the control box and the filter box are connected by a connecting pipe on the side adjacent to each other, and the filter box is provided with a fixing groove inside, and a filter element is threaded into the fixing groove.

[0012] By setting up a filter box, it is beneficial to protect the control box from dust and prevent dust and other substances from clogging the pressure sensor insertion and detection point.

[0013] In a preferred embodiment, the surface of the control box is provided with a door, the surface of the processor is fixedly mounted with a display screen, both sides of the control box are provided with heat dissipation slots, both sides of the control box and near the heat dissipation slots are fixedly mounted with protective covers, a buzzer is fixedly mounted on one side of the control box, a warning light is fixedly mounted in a circular array on the outer side of the buzzer, and a mounting slot is provided on the side of the control box away from the buzzer, and a communication antenna is fixedly mounted inside the mounting slot.

[0014] The display screen allows for real-time display of the values ​​from the two pressure sensors, the buzzer and warning light provide an alarm when the pressure difference exceeds the set value, and the heat dissipation slots facilitate the cooling of the heat generated by the various electrical components inside the mounting cavity.

[0015] In a preferred embodiment, a sealing gasket is fixedly installed on the side of the second connecting seat near the first connecting seat, and a sealing groove is correspondingly opened on the side of the first connecting seat near the sealing gasket. A fixing seat is fixedly installed on the outer side of the outdoor pressure acquisition pipe away from the connecting pipe, and a dust cover is threadedly connected to the outer side of the fixing seat.

[0016] By extending the sealing gasket into the corresponding sealing groove, the tightness of the connection between the No. 2 connector and the dust cover is enhanced. The fixed seat and dust cover also help protect the outside of the outdoor pressure acquisition pipe, making it more convenient to use.

[0017] The pressure difference detection device for cleanrooms provided by this utility model has the following advantages:

[0018] This utility model, in use, involves installing an outdoor pressure acquisition pipe through a preset position, and then fixing the operating box to the side near the outdoor pressure acquisition pipe with bolts. The set connection components facilitate quick and easy connection and fixation of the outdoor pressure acquisition pipe and the connecting pipe, saving time and effort and making it more convenient to use. It solves the technical problems of existing fixed electronic differential pressure sensors, which usually require complex wiring, are inconvenient to install and maintain, have relatively high costs, and whose sensor probes are easily contaminated or damaged when exposed to airflow, making them inconvenient to use. Attached Figure Description

[0019] Figure 1This is a three-dimensional schematic diagram of a pressure difference detection device for cleanrooms proposed in this utility model.

[0020] Figure 2 This is a three-dimensional cross-sectional view of the operating box in a pressure difference detection device for cleanrooms proposed in this utility model.

[0021] Figure 3 This is a three-dimensional cross-sectional view of the overall device for detecting the internal and external pressure difference in a cleanroom, as proposed in this utility model.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0023] In the attached diagram: 1. Wall; 2. Control box; 21. Mounting cavity; 22. Box door; 23. Heat dissipation slot; 24. Protective cover; 25. Buzzer; 26. Warning light; 27. Mounting slot; 28. Communication antenna; 3. Indoor pressure acquisition connector; 4. Outdoor pressure acquisition connector; 41. Fixing base; 42. Dust cover; 43. Connecting base No. 1; 5. Connecting pipe; 51. Connecting base No. 2; 52. Sealing gasket; 6. Filter box; 61. Fixing slot; 62. Filter element; 7. Pressure sensor; 8. Processor; 81. Display screen; 9. Connecting assembly; 91. Mounting base; 92. Moving assembly; 921. Slide No. 1; 922. Slider No. 1; 923. Threaded rod No. 1; 924. Slide No. 2; 925. Slider No. 2; 93. Positioning seat; 94. Positioning slot; 95. Moving slot; 96. Positioning component; 97. Threaded rod No. 2. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] This utility model discloses a device for detecting the pressure difference between the inside and outside of a cleanroom.

[0026] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4An internal and external pressure difference detection device for a cleanroom includes: a wall 1 and an operating box 2. The operating box 2 is fixedly installed on one side of the wall 1. An installation cavity 21 is opened inside the operating box 2. Pressure sensors 7 are fixedly installed on the top and bottom walls of the installation cavity 21. Filter boxes 6 are fixedly installed on the top and bottom of the operating box 2 and close to the corresponding pressure sensors 7. A processor 8 is fixedly installed inside the installation cavity 21 and between the two filter boxes 6. An indoor pressure acquisition pipe 3 is fixedly installed through the top of the top filter box 6. An outdoor pressure acquisition pipe 4 is fixedly installed through the inside of the wall 1. A connecting pipe 5 is fixedly installed through the bottom of the bottom filter box 6. The connecting pipe 5 and the outdoor pressure acquisition pipe 4 are fixed together by a connecting component 9.

[0027] In this embodiment, the outdoor pressure acquisition pipe 4 is installed through a preset position, and the operation box 2 is fixed to the side near the outdoor pressure acquisition pipe 4 with bolts. The connection component 9 facilitates the quick connection and fixation of the outdoor pressure acquisition pipe 4 and the connecting pipe 5, saving time and effort and making it more convenient to use. This solves the technical problems of existing fixed electronic differential pressure sensors, which usually require complex wiring, are inconvenient to install and maintain, have relatively high costs, and whose sensor probes are easily contaminated or damaged when exposed to airflow, making them inconvenient to use.

[0028] The connecting component 9 includes a mounting base 91, which is fixedly installed on the outside of the outdoor pressure acquisition pipe 4 and near the end of the operating box 2. A first connecting base 43 is fixedly installed on the side of the outdoor pressure acquisition pipe 4 near the connecting pipe 5, and a second connecting base 51 is fixedly installed on the side of the connecting pipe 5 near the first connecting base 43. Positioning bases 93 are symmetrically connected to the mounting base 91 near the connection between the outdoor pressure acquisition pipe 4 and the connecting pipe 5 via a moving component 92. Positioning grooves 94 are provided on the side of each positioning base 93 near the first connecting base 43 and the second connecting base 51. Moving grooves 95 are correspondingly provided inside the positioning bases 93 on the side near the connecting pipe 5. The moving grooves 95 are slidably connected... The positioning element 96 is attached, and a second threaded rod 97 is threadedly connected to one side of the positioning seat 93. The end of the second threaded rod 97 near the positioning element 96 extends into the positioning element 96 and is rotatably connected to the positioning element 96. A positioning groove 94 is opened on the side of the second connecting seat 51 near the positioning element 96, and the positioning element 96 extends into the positioning groove 94. By setting the connecting component 9, the moving component 92 drives the positioning seat 93 to move towards the first connecting seat 43 and the second connecting seat 51. Then, the second threaded rod 97 is rotated, which drives the positioning element 96 to move towards the corresponding positioning groove 94. This makes the connection between the second connecting seat 51 and the first connecting seat 43 tighter, and the connection is convenient and quick.

[0029] The movable component 92 includes a first slide groove 921. A first slide groove 921 is symmetrically formed on the side of the mounting base 91 near the positioning seat 93. A first slider 922 is slidably connected inside each first slide groove 921. A first threaded rod 923 is symmetrically threaded inside the mounting base 91. One end of the first threaded rod 923 near the first slider 922 extends into the first slider 922 and is rotatably connected to it. One end of the first slider 922 near the positioning seat 93 is fixedly connected to the corresponding positioning seat 93. The mounting base 91 and... A second slide 924 is provided near the first slide 921. A second slider 925 is slidably connected inside the second slide 924. The side of the second slider 925 near the first slider 922 is fixedly connected to the corresponding first slider 922. By rotating the first threaded rod 923 through the provided moving component 92, the first slider 922 is pushed to move the positioning seat 93 toward the second connecting seat 51 and the first connecting seat 43. The second slide 924 and the second slider 925 are provided to enhance the stability of the movement of the first slider 922.

[0030] The control box 2 and the filter box 6 are connected by a connecting pipe on the side that are close to each other. The filter box 6 is provided with a fixing groove 61, and a filter element 62 is threadedly connected inside the fixing groove 61. By setting the filter box 6, it is beneficial to protect the control box 2 from dust and prevent dust and other objects from clogging the pressure sensor 7 at the detection point.

[0031] The control box 2 has a door 22 on its surface, and a display screen 81 is fixedly installed on the surface of the processor 8. Heat dissipation slots 23 are provided on both sides of the control box 2, and protective covers 24 are fixedly installed on both sides of the control box 2 near the heat dissipation slots 23. A buzzer 25 is fixedly installed on one side of the control box 2, and warning lights 26 are fixedly installed in a circular array on the outer side of the buzzer 25. A mounting slot 27 is provided on the side of the control box 2 away from the buzzer 25, and a communication antenna 28 is fixedly installed inside the mounting slot 27. The display screen 81 facilitates real-time display of the values ​​of the two pressure sensors 7, the buzzer 25 and warning lights 26 facilitate alarms when the pressure difference exceeds a set value, and the heat dissipation slots 23 facilitate heat dissipation from the various electrical components inside the mounting cavity 21.

[0032] A sealing gasket 52 is fixedly installed on the side of the second connecting seat 51 near the first connecting seat 43. A sealing groove is correspondingly opened on the side of the first connecting seat 43 near the sealing gasket 52. A fixing seat 41 is fixedly installed on the outer side of the end of the outdoor pressure acquisition pipe 4 away from the connecting pipe 5. A dust cover 42 is threadedly connected to the outer side of the fixing seat 41. By setting the sealing gasket 52 to extend into the corresponding sealing groove, it is beneficial to strengthen the tightness of the connection between the second connecting seat 51 and the dust cover 42. The fixing seat 41 and the dust cover 42 are beneficial to protect the outer side of the outdoor pressure acquisition pipe 4, making it more convenient to use.

[0033] All electrical devices in this plan are powered by an external power source.

[0034] Working principle: In use, the outdoor pressure acquisition pipe 4 is installed through the preset position, and the operation box 2 is fixed to the side near the outdoor pressure acquisition pipe 4 with bolts. The connection component 9 facilitates the quick connection and fixation of the outdoor pressure acquisition pipe 4 and the connecting pipe 5, saving time and effort and making it more convenient to use. The connection component 9 is set up so that the moving component 92 drives the positioning seat 93 to move towards the first connecting seat 43 and the second connecting seat 51. Then, the second threaded rod 97 is rotated to drive the positioning part 96 to move towards the corresponding positioning groove 94, so that the connection between the second connecting seat 51 and the first connecting seat 43 is tighter and the connection is convenient and quick.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A device for detecting the internal and external pressure difference in a cleanroom, comprising a wall (1) and an operating box (2), characterized in that, The operation box (2) is fixedly installed on one side of the wall (1). An installation cavity (21) is opened inside the operation box (2). Pressure sensors (7) are fixedly installed on the top and bottom walls of the installation cavity (21). Filter boxes (6) are fixedly installed on the top and bottom of the operation box (2) and close to the corresponding pressure sensors (7). A processor (8) is fixedly installed inside the installation cavity (21) and between the two filter boxes (6). An indoor pressure acquisition pipe (3) is fixedly installed through the top of the filter box (6) at the top. An outdoor pressure acquisition pipe (4) is fixedly installed through the inside of the wall (1). A connecting pipe (5) is fixedly installed through the bottom of the filter box (6) at the bottom. The connecting pipe (5) is fixed to the outdoor pressure acquisition pipe (4) by a connecting component (9).

2. The pressure difference detection device for a cleanroom according to claim 1, characterized in that, The connecting assembly (9) includes a mounting base (91), which is fixedly installed on the outside of the outdoor pressure acquisition pipe (4) and near the end of the operating box (2). A first connecting seat (43) is fixedly installed on the side of the outdoor pressure acquisition pipe (4) near the connecting pipe (5), and a second connecting seat (51) is fixedly installed on the side of the connecting pipe (5) near the first connecting seat (43). The mounting base (91) is symmetrically connected to positioning seats (93) via a moving assembly (92) near the connection between the outdoor pressure acquisition pipe (4) and the connecting pipe (5). The two positioning seats (93) are located near the first connecting seat (43) and the second connecting seat (51). A positioning groove (94) is provided on one side of the connecting seat (51). A moving groove (95) is provided on the side of the positioning seat (93) near the connecting pipe (5). A positioning element (96) is slidably connected inside the moving groove (95). A second threaded rod (97) is threadedly connected on one side of the positioning seat (93). The end of the second threaded rod (97) near the positioning element (96) extends into the positioning element (96) and is rotatably connected to the positioning element (96). A positioning groove (94) is provided on the side of the second connecting seat (51) near the positioning element (96). The positioning element (96) extends into the positioning groove (94).

3. The pressure difference detection device for a cleanroom according to claim 2, characterized in that, The moving component (92) includes a first slide groove (921). The mounting base (91) has a first slide groove (921) symmetrically opened on one side near the positioning base (93). A first slider (922) is slidably connected inside the first slide groove (921). A first threaded rod (923) is symmetrically threaded inside the mounting base (91). The end of the first threaded rod (923) near the first slider (922) extends into the first slider (922) and is rotatably connected to the first slider (922). The end of the first slider (922) near the positioning base (93) is fixedly connected to the corresponding positioning base (93). A second slide groove (924) is opened inside the mounting base (91) near the first slide groove (921). A second slider (925) is slidably connected inside the second slide groove (924). The side of the second slider (925) near the first slider (922) is fixedly connected to the corresponding first slider (922).

4. The pressure difference detection device for a cleanroom according to claim 1, characterized in that, The operation box (2) and the filter box (6) are connected by a connecting pipe on the side that is close to each other. The filter box (6) is provided with a fixing groove (61) and a filter element (62) is threaded inside the fixing groove (61).

5. The pressure difference detection device for a cleanroom according to claim 1, characterized in that, The surface of the operation box (2) is provided with a door (22), the surface of the processor (8) is fixedly mounted with a display screen (81), both sides of the operation box (2) are provided with heat dissipation slots (23), both sides of the operation box (2) and near the heat dissipation slots (23) are fixedly mounted with protective covers (24), one side of the operation box (2) is fixedly mounted with a buzzer (25), the outer circumferential array of the buzzer (25) is fixedly mounted with warning lights (26), the side of the operation box (2) away from the buzzer (25) is provided with a mounting slot (27), and a communication antenna (28) is fixedly mounted inside the mounting slot (27).

6. A pressure difference detection device for a cleanroom according to claim 2, characterized in that, A sealing gasket (52) is fixedly installed on the side of the second connecting seat (51) near the first connecting seat (43). A sealing groove is opened on the side of the first connecting seat (43) near the sealing gasket (52). A fixing seat (41) is fixedly installed on the outer side of the outdoor pressure acquisition pipe (4) away from the connecting pipe (5). A dust cover (42) is threadedly connected to the outer side of the fixing seat (41).

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