Clean room air conditioner filter differential pressure alarm device

Abstract

The utility model relates to air conditioner component technical field discloses a clean area air conditioner filter differential pressure alarm device, include: alarm body, the end of alarm body is provided with the spigot, two terminal posts are fixedly arranged in the spigot, the end of alarm body is detachably installed with the power supply structure for and the terminal post plug -in and provide power supply, and the power supply structure includes battery box, plug -in block and conducting pipe and shape change groove, the battery box is installed with the battery, and the plug -in block is fixedly connected with the battery box and is inserted with the spigot, the plug -in block fixedly installs two conducting pipes of battery electricity connection, and the terminal post can be inserted with the petal -like structure of conducting pipe and form closed loop, the connection scheme of innovative petal -like structure conducting pipe and spherical convex cooperation annular stop slot, when the terminal post is inserted, a plurality of petal -like structures can evenly wrap the terminal post, provide greater contact area and stable clamping force, effectively resist the loosening brought by vibration.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning component technology, and in particular to a differential pressure alarm device for a cleanroom air conditioning filter. Background Technology

[0002] In air conditioning systems of clean areas (such as pharmaceutical workshops, electronic cleanrooms, and operating rooms), high-efficiency filters are the core components for ensuring air cleanliness. As the usage time increases, filters gradually become clogged due to the accumulation of particulate matter, leading to an increase in resistance (pressure difference) across them. This not only reduces the air supply volume but also affects the airflow organization and stability in the clean area, thus requiring pressure difference monitoring.

[0003] A search revealed that the prior art discloses a differential pressure alarm device for precision air conditioning filters in data centers (Announcement No.: CN216114593U), which includes an alarm body, a mounting box, a display screen, and buttons. Alarm sensor terminals are mounted on both ends of the top of the alarm body via mounting slots. A fixing block is provided around the bottom of each alarm sensor terminal. An L-shaped fixing plate is provided on the top of the alarm body near the alarm sensor terminal. An adjusting screw is mounted on the top of the L-shaped fixing plate via a threaded hole. A bushing is fitted around the bottom of the adjusting screw, and a displacement pressing block is fitted around the bushing. The displacement pressing block is located above the alarm sensor terminal and has a groove at its bottom corresponding to the alarm sensor terminal.

[0004] Most existing devices use external power supplies or internally fixed batteries. External power supply wiring is complex and lacks flexibility in certain situations; while internally fixed batteries, if they leak, the electrolyte will directly corrode the delicate electronic components inside the alarm, causing permanent damage, and battery replacement is inconvenient. In addition, the electrical connection interfaces of existing devices may develop poor contact due to vibration or oxidation after long-term use, affecting the reliability of the alarm.

[0005] Therefore, we propose a differential pressure alarm device for air conditioning filters in clean areas. Utility Model Content

[0006] The present invention mainly addresses the aforementioned technical problem of poor power supply stability by providing a differential pressure alarm device for air conditioning filters in clean areas.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a differential pressure alarm device for a cleanroom air conditioning filter, comprising:

[0008] The alarm body has a socket at one end, with two terminals fixed inside. A power supply structure for connecting to the terminals and providing power is detachably installed at the end of the alarm body. The power supply structure includes a battery box, a plug, conductive tubes, and deformation grooves. A battery is installed in the battery box. The plug is fixedly connected to the battery box and plugged into the socket. Two conductive tubes electrically connected to the battery are fixedly installed on the plug. The conductive tubes have several deformation grooves, forming a petal-like structure. The terminals can connect to the petal-like structure of the conductive tubes to form a closed loop.

[0009] In a preferred embodiment of this utility model, the insert is a rectangular block with a clearance fit between the insert and the socket. The side wall of the insert near the alarm body has a hole for installing a conductive tube, and the conductive tube is fixedly installed in the hole.

[0010] In a preferred embodiment of this utility model, the conductive tube is formed into a circular tube, and the terminal is a metal cylinder with a diameter larger than the inner diameter of the conductive tube.

[0011] In a preferred embodiment of this utility model, the deformation groove is formed at the end of the conductive tube. The deformation groove is a rectangular groove, and the depth of the deformation groove is less than the length of the conductive tube. Two adjacent conductive tubes form a petal-shaped structure. The end of each petal-shaped structure is chamfered, and the ends of multiple petal-shaped structures together form a flared mouth.

[0012] In a preferred embodiment of this utility model, the power supply structure further includes protrusions and anti-detachment grooves. The anti-detachment grooves are formed in the terminals, and several protrusions are fixedly installed on the conductive tube. The protrusions can be inserted into the anti-detachment grooves.

[0013] In a preferred embodiment of this utility model, the anti-detachment groove is an annular groove, which is opened on the circumferential surface of the terminal block. The protrusion is a sphere, which is integrally formed with the conductive tube and disposed on the inner wall of the conductive tube. Each petal structure of the conductive tube is provided with a protrusion.

[0014] In a preferred embodiment of this utility model, a fastening screw is threadedly connected to the top of the alarm body, and a locking block is rotatably connected to the end of the fastening screw. An anti-disengagement groove is formed on the top of the insertion block, and the locking block can be inserted into the anti-disengagement groove and push the insertion block closer to the alarm body.

[0015] In a preferred embodiment of this utility model, a threaded hole is provided on the top of the alarm body, and a groove for sliding the locking block is provided on the inner top surface of the alarm body located at the socket. The locking block is a wedge-shaped block, and the side wall of the anti-disengagement groove is chamfered to form a slope. The inclined surface of the locking block can abut against the slope of the anti-disengagement groove.

[0016] This invention provides a differential pressure alarm device for air conditioning filters in clean areas. It has the following beneficial effects:

[0017] 1. This cleanroom air conditioning filter differential pressure alarm device employs an external, quick-pluggable independent battery box design, physically isolating the battery from the precision circuitry inside the alarm unit. This design significantly reduces the risk of damage to core electronic components due to battery leakage. Furthermore, battery replacement does not require opening the alarm casing, making operation simple and quick, facilitating daily maintenance, and reducing downtime. The innovative connection scheme, featuring a petal-shaped conductive tube and a spherical protrusion combined with an annular anti-detachment groove, ensures that multiple petal-shaped structures evenly wrap around the terminal block when it is inserted, providing a larger contact area and stable clamping force, effectively resisting loosening caused by vibration. The engagement of the protrusion and the anti-detachment groove not only provides a clear physical feel of placement (a "click") but also effectively prevents detachment, ensuring a continuous and stable power connection.

[0018] 2. This cleanroom air conditioning filter differential pressure alarm device can drive the locking block to press the plug by rotating the fastening screw, providing a strong mechanical locking force to prevent the power supply structure from loosening due to accidental pulling, and further ensuring the long-term reliable operation of the equipment in industrial environments.

[0019] 3. The differential pressure alarm device for cleanroom air conditioning filters features a modular design that separates the power supply module from the detection and alarm module. This allows the battery box to be used as a standard component, facilitating mass production and replacement, and also making it convenient for users to stock spare parts, thus improving the overall practicality and economy of the equipment. Attached Figure Description

[0020] Figure 1 This is a perspective view of the entire utility model;

[0021] Figure 2 This is a perspective view of the alarm device body of this utility model;

[0022] Figure 3 This is a perspective view of the power supply structure of this utility model;

[0023] Figure 4 This is a schematic diagram showing the connection and insertion of the terminal block and the power supply structure of this utility model;

[0024] Figure 5 This is an assembly diagram of the terminal block and conductive tube of this utility model.

[0025] Legend: 10. Alarm body; 11. Battery box; 12. Socket; 13. Terminal; 14. Fastening screw; 15. Locking block; 16. Anti-detachment groove; 20. Insert block; 21. Conductive tube; 22. Deformation groove; 23. Protrusion; 24. Anti-detachment groove. Detailed Implementation

[0026] A differential pressure alarm device for air conditioning filters in clean areas, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes:

[0027] The alarm body 10 has a socket 12 at one end, and two terminals 13 are fixedly installed in the socket 12. A power supply structure for connecting to and providing power to the terminals 13 is detachably installed at the end of the alarm body 10. The power supply structure includes a battery box 11, a plug 20, conductive tubes 21, and deformation grooves 22. A battery is installed in the battery box 11. The plug 20 is fixedly connected to the battery box 11 and plugs into the socket 12. Two conductive tubes 21, electrically connected to the battery, are fixedly installed in the plug 20. Several deformation grooves 22 are formed in the conductive tubes 21, creating a petal-like structure. The terminals 13 can connect to the petal-like structure of the conductive tubes 21. The structure forms a closed loop through the interlocking. The plug 20 is a rectangular block, and the plug 20 is clearance-fitted with the socket 12. The side wall of the plug 20 near the alarm body 10 has a hole for installing the conductive tube 21. The conductive tube 21 is fixedly installed in the hole and forms a round tube. The terminal 13 is a metal cylinder with a diameter larger than the inner diameter of the conductive tube 21. The deformation groove 22 is opened at the end of the conductive tube 21. The deformation groove 22 is a rectangular groove with a depth less than the length of the conductive tube 21. Two adjacent conductive tubes 21 form a petal structure. The end of each petal structure is chamfered, and the ends of multiple petal structures together form a flared mouth.

[0028] In this solution, by setting an external and detachable power supply structure, the risk of damage to the internal electronic components of the battery leakage alarm body 10 can be reduced. Secondly, the external and detachable power supply structure facilitates replacement and maintenance. By inserting the plug 20 into the socket 12 and interlocking the terminal 13 with the petal structure of the conductive tube 21, the battery can be electrically connected to the terminal 13. The conductive tube 21 with multiple deformation grooves 22 forms multiple petal structures. The petal structures have better deformation capabilities to wrap the terminal 13 to form stable contacts and improve the stability of the electrical connection.

[0029] like Figure 5 As shown, the power supply structure also includes protrusions 23 and anti-detachment grooves 24. The terminal 13 is provided with anti-detachment grooves 24, and the conductive tube 21 is fixedly installed with several protrusions 23. The protrusions 23 can be inserted into the anti-detachment grooves 24. The anti-detachment grooves 24 are annular grooves and are opened on the circumferential surface of the terminal 13. The protrusions 23 are spheres and are integrally formed with the conductive tube 21 and set on the inner wall of the conductive tube 21. Each petal structure of the conductive tube 21 is provided with a protrusion 23.

[0030] In this design, by setting the protrusion 23 and the anti-detachment groove 24, when the terminal 13 is inserted into the conductive tube 21, the protrusion 23 can be locked into the anti-detachment groove 24 to prevent the conductive tube 21 from falling off the terminal 13, thus providing a certain radial limiting and anti-detachment effect. Secondly, the deformable petal structure, together with the protrusion 23, is locked into the anti-detachment groove 24, and a clicking sound will be generated when the terminal 13 and the conductive tube 21 are inserted, indicating that the terminal 13 and the conductive tube 21 are inserted in place, which has a certain prompting function.

[0031] like Figure 3 and Figure 4 As shown, a fastening screw 14 is threadedly connected to the top of the alarm body 10, and a locking block 15 is rotatably connected to the end of the fastening screw 14. An anti-disengagement groove 16 is opened on the top of the plug 20. The locking block 15 can be inserted into the anti-disengagement groove 16 and push the plug 20 close to the alarm body 10. A threaded hole is opened on the top of the alarm body 10. A groove for sliding the locking block 15 is opened on the inner top surface of the alarm body 10 located at the plug 12. The locking block 15 is a wedge-shaped block. The side wall of the anti-disengagement groove 16 is chamfered to form a slope. The slope of the locking block 15 can abut against the slope of the anti-disengagement groove 16.

[0032] To improve the stability of the connection between the plug 20 and the socket 12, the plug 20 can be made of silicone. By rotating the fastening screw 14, the fastening screw 14 pushes the locking block 15 down into the slot. The inclined surface of the locking block 15 pushes against the slope of the anti-disengagement groove 16. Under the action of the wedge structure, the locking block 15 will give the plug 20 a pushing force towards the alarm body 10, which can ensure the stability of the connection between the plug 20 and the alarm body 10 and the anti-disengagement effect, reduce the probability of the terminal 13 disengaging from the conductive tube 21, and ensure the stability of the power supply.

[0033] The working principle of this utility model is as follows: The alarm body 10 integrates a differential pressure sensor (not shown in the figure, but it is a standard configuration in this field). The sensor is connected to the front (air inlet side) and rear (air outlet side) of the HEPA filter through two pressure tapping hoses. The differential pressure sensor detects the pressure difference between the front and rear of the filter in real time and converts it into an electrical signal. This electrical signal is processed by the microprocessor (or comparison circuit) inside the alarm body 10. The microprocessor compares the current differential pressure value with the alarm threshold preset by the user (usually corresponding to the resistance when the filter needs to be cleaned or replaced). When the detected differential pressure reaches or exceeds the set threshold, the microprocessor will trigger the alarm circuit and drive the audible and visual alarm (such as a buzzer sounding and an alarm light flashing) to promptly remind the staff to handle the situation.

[0034] Insert the plug 20 of the power supply structure into the socket 12 of the alarm body 10. During insertion, the end of the terminal 13 will be guided along the flared end of the conductive tube 21 and expand the petal-shaped structure formed by the deformation groove 22. When the annular anti-disengagement groove 24 on the terminal 13 moves to the position aligned with the spherical protrusion 23 on the inner wall of the conductive tube 21, the elasticity of the petal-shaped structure will cause the protrusion 23 to be locked into the anti-disengagement groove 24, accompanied by a "click" sound, indicating that the physical connection is in place and the circuit is conducting. Then, tighten the fastening screw 14 to push the wedge-shaped locking block 15 downward. The inclined surface of the locking block 15 interacts with the slope of the anti-disengagement groove 16 to generate a force that presses the plug 20 tightly against the alarm body 10, completing the mechanical locking. When the battery needs to be replaced, simply loosen the fastening screw 14 in the opposite direction to allow the locking block 15 to exit the anti-disengagement groove 16, and the entire power supply module can be pulled out directly, which is safe and quick.

[0035] The alarm body 10 integrates a micro differential pressure sensor module (such as a differential pressure chip based on MEMS technology). This module has two pressure interfaces, which are connected to the front and rear ends of the high-efficiency filter respectively through a Φ6mm pressure tapping tube (not shown in the figure) penetrating the housing of the alarm body 10. The electrical signal output by the micro differential pressure sensor is connected to a microcontroller (MCU). The MCU stores alarm thresholds preset by the user via buttons (which can be set on the panel). The MCU compares the sensor signal with the thresholds in real time. When the differential pressure exceeds the limit, the MCU controls the drive circuit to activate the buzzer and red LED. The alarm light provides both audible and visual alarms. Additionally, a relay output interface can be added to transmit alarm signals to a central monitoring system. The alarm unit's panel can be equipped with a digital display and setting buttons to display the current differential pressure value in real time and allow users to set alarm thresholds. Remote parameter configuration and monitoring can also be performed via a communication interface (such as RS485). The MCU program can integrate a delay-triggered algorithm (such as setting a 3-5 second delay). An alarm is only triggered when the differential pressure exceeds the set delay time, thus avoiding false alarms caused by brief fluctuations in the ventilation system or external interference.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A differential pressure alarm device for a cleanroom air conditioning filter, characterized in that, include: The alarm body (10) has a socket (12) at its end. Two terminals (13) are fixedly installed in the socket (12). The end of the alarm body (10) is detachably equipped with a power supply structure for interlocking with the terminals (13) and providing power. The power supply structure includes a battery box (11), a plug (20), a conductive tube (21), and a deformation groove (22). The battery box (11) contains a battery. The plug (20) is fixedly connected to the battery box (11) and plugged into the socket (12). The plug (20) is fixedly equipped with two conductive tubes (21) that are electrically connected to the battery. The conductive tubes (21) have several deformation grooves (22). The conductive tubes (21) form a petal-shaped structure through the deformation grooves (22). The terminals (13) can interlock with the petal-shaped structure of the conductive tubes (21) to form a closed loop.

2. The differential pressure alarm device for cleanroom air conditioning filters according to claim 1, characterized in that: The plug (20) is a rectangular block. The plug (20) is fitted with the socket (12) with a clearance. The plug (20) has a hole on the side wall near the alarm body (10) for installing the conductive tube (21). The conductive tube (21) is fixedly installed in the hole.

3. The differential pressure alarm device for cleanroom air conditioning filters according to claim 1, characterized in that: The conductive tube (21) is formed into a circular tube, and the terminal (13) is a metal cylinder with a diameter greater than the inner diameter of the conductive tube (21).

4. The differential pressure alarm device for cleanroom air conditioning filters according to claim 1, characterized in that: The deformation groove (22) is opened at the end of the conductive tube (21). The deformation groove (22) is a rectangular groove. The depth of the deformation groove (22) is less than the length of the conductive tube (21). Two adjacent conductive tubes (21) form a petal structure. The end of each petal structure is chamfered. The ends of multiple petal structures together form a flared mouth.

5. The differential pressure alarm device for cleanroom air conditioning filters according to claim 1, characterized in that: The power supply structure also includes a protrusion (23) and a locking groove (24). The locking groove (24) is opened on the terminal (13). Several protrusions (23) are fixedly installed on the conductive tube (21). The protrusions (23) can be inserted into the locking groove (24).

6. The differential pressure alarm device for cleanroom air conditioning filters according to claim 5, characterized in that: The anti-detachment groove (24) is an annular groove, and the anti-detachment groove (24) is opened on the circumferential surface of the terminal (13). The protrusion (23) is a sphere, and the protrusion (23) is integrally formed with the conductive tube (21) and is set on the inner wall of the conductive tube (21). Each petal structure of the conductive tube (21) is provided with a protrusion (23).

7. The differential pressure alarm device for cleanroom air conditioning filters according to claim 1, characterized in that: The top of the alarm body (10) is threaded with a fastening screw (14), and the end of the fastening screw (14) is rotatably connected with a locking block (15). The top of the plug (20) has an anti-disengagement groove (16), and the locking block (15) can be inserted into the anti-disengagement groove (16) and push the plug (20) closer to the alarm body (10).

8. The differential pressure alarm device for cleanroom air conditioning filters according to claim 7, characterized in that: The alarm body (10) has a threaded hole at the top and a slot for sliding the locking block (15) is provided on the inner top surface of the alarm body (10) at the socket (12). The locking block (15) is a wedge-shaped block and the side wall of the anti-disengagement groove (16) is chamfered to form a slope. The slope of the locking block (15) can abut against the slope of the anti-disengagement groove (16).

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