Automatic alarm device of frequency conversion control cabinet

Abstract

The utility model discloses an automatic alarm device for a frequency conversion control cabinet, which comprises an extension shell fixedly connected to the rear side of a frequency conversion control cabinet body and heat dissipation fins arranged on the back of the frequency conversion control cabinet body, and the rear ends of the heat dissipation fins extend into the extension shell. The internal temperature of the extension shell rises rapidly, the fuse is fused, the movable frame loses the tension of the fuse and moves upwards under the tension of the tension spring, the movable frame moves upwards to drive the closing plate and the sealing plug to move upwards, the closing plate moves upwards to close the ventilation groove, and the sealing plug enters the heat dissipation hole to close the ventilation groove. The frequency conversion control cabinet has the advantages that the temperature of the frequency conversion control cabinet is detected, sound-light alarm is given in time when a high temperature condition and an electric leakage condition occur, the alarm device is sealed and flame-retardant when a fire occurs, fire spreading is avoided, maintenance personnel can timely arrive and handle the fire, and the alarm response processing time is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter control cabinet technology, specifically to an automatic alarm device for frequency converter control cabinets. Background Technology

[0002] Variable frequency drive (VFD) control cabinets are primarily used to regulate the operating frequency of equipment, reduce energy consumption, and ensure smooth equipment startup. They minimize damage to motors from the high current generated during direct startup and are widely applicable to automatic control in various settings, including industrial and agricultural production, water supply and drainage, fire protection, sprinkler system pressurization, and HVAC hot and cold water circulation. However, existing VFD control cabinets lack effective automatic alarm mechanisms. When abnormal conditions such as overheating or electrical leakage occur within the cabinet, alarms are not issued promptly, potentially leading to equipment damage or even safety accidents. Therefore, a device capable of timely detection and alarm is needed to ensure the safe operation of VFD control cabinets.

[0003] Therefore, it is necessary to modify the system to detect the temperature of the frequency converter control cabinet, and to promptly issue audible and visual alarms when high temperatures or leakage occur. In the event of a fire, the alarm device should be sealed off to prevent the fire from spreading, so that maintenance personnel can arrive in time to handle the situation and improve the alarm response and processing time. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide an automatic alarm device for frequency converter control cabinets. This device can detect the temperature of the frequency converter control cabinet, promptly issue audible and visual alarms when high temperature or leakage occurs, and simultaneously seal the alarm device to prevent the spread of fire in case of fire, thus enabling maintenance personnel to arrive and handle the situation in a timely manner. This increases the alarm response and processing time and solves the problem that when abnormal conditions such as excessively high temperature or leakage occur inside the cabinet, the alarm cannot be issued in time, which may lead to equipment damage or even safety accidents.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic alarm device for a frequency converter control cabinet, comprising an extension shell fixedly connected to the rear side of the frequency converter control cabinet body and heat dissipation fins disposed on the back side of the frequency converter control cabinet body. The rear end of the heat dissipation fins extends into the interior of the extension shell. A heat dissipation hole is provided at the top of the extension shell, and a heat dissipation fan is disposed inside the heat dissipation hole. Ventilation slots are provided on both the left and right sides of the extension shell. A temperature sensor is fixedly connected to the top of the inner wall of the extension shell. A leakage current sensor is fixedly connected to the rear of the bottom of the inner wall of the extension shell. A controller is fixedly connected to the front of the bottom of the inner wall of the extension shell. An audible and visual alarm is fixedly connected to the left side of the extension shell. The controller is electrically connected to the temperature sensor, the leakage current sensor, and the audible and visual alarm respectively. A movable sealing mechanism is slidably connected to the upper part of the interior of the extension shell. A mezzanine groove communicating with the ventilation slots is provided on the lower part of both the left and right sides of the extension shell, and a sealing plate is slidably connected inside the mezzanine groove. The movable sealing mechanism is fixedly connected to the top of the sealing plate by a pull rod.

[0006] As a preferred embodiment of this utility model, the movable enclosure mechanism includes a movable frame slidably connected to the upper part of the inside of the extension shell. Tension springs are fixedly connected to the left and right sides of the top of the movable frame. The top of the tension springs is fixedly connected to the top of the inner wall of the extension shell. Fuse wires are fixedly connected to the left and right sides of the bottom of the movable frame. The bottom of the fuse wires is fixedly connected to the inner wall of the extension shell through a connecting block.

[0007] As a preferred embodiment of this utility model, a support rod is fixedly connected to the top of the movable frame, and a sealing plug is fixedly connected to the top of the support rod. The sealing plug and the heat dissipation hole are on the same axis, and the diameter of the sealing plug is the same as the diameter of the heat dissipation hole.

[0008] As a preferred embodiment of this utility model, sliders are fixedly connected to both the left and right sides of the movable frame, and sliding grooves that cooperate with the sliders are opened on both the left and right sides of the inner wall of the extension shell. The surface of the slider is slidably connected to the inner wall of the sliding groove.

[0009] As a preferred embodiment of this utility model, both the left and right sides of the extended shell are movably connected by bolts to protective frames located outside the ventilation slots, and dustproof nets are provided inside the protective frames.

[0010] As a preferred embodiment of this utility model, a rear cover is movably connected to the back of the extended shell by bolts, and a fireproof sealing cover is fixedly connected to the front of the rear cover. The surface of the fireproof sealing cover is in contact with the inner wall of the extended shell, and a rock wool fireproof layer is provided around the inner wall of the extended shell.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model incorporates heat dissipation fins. The front of the heat dissipation fins absorbs the heat emitted by the frequency converter control cabinet during operation, and then dissipates it through the fins distributed on their surface. The heat is then exhausted by a cooling fan installed inside the heat dissipation holes. External air enters the extended shell through ventilation slots, increasing airflow speed and accelerating heat dissipation. When abnormal heating occurs in the working components inside the frequency converter control cabinet, the temperature of the heat dissipation fins rises, causing the temperature inside the extended shell to rise. The temperature sensor sends a signal to the controller, controlling the internal components of the frequency converter control cabinet to stop working and cutting off the power supply. Simultaneously, an audible and visual alarm sounds and flashes. When an open flame appears, the internal temperature of the extension housing rises rapidly, causing the fuse to blow. The moving frame, no longer pulled by the fuse, moves upwards under the tension of the spring. This upward movement of the moving frame causes the sealing plate and sealing plug to move upwards as well. The sealing plate seals the ventilation slots, and the sealing plug enters the heat dissipation hole to seal it, reducing oxygen intake. This achieves the advantages of detecting the temperature of the frequency converter control cabinet, providing timely audible and visual alarms in case of high temperatures or leakage, and simultaneously sealing the alarm device to prevent the fire from spreading, allowing maintenance personnel to arrive promptly and increasing alarm response time.

[0013] 2. This utility model uses a combination of a movable frame, a tension spring, and a fuse. The fuse fixes the movable frame to the bottom, and the tension spring is in a stretched state. When a high-temperature fire occurs, the fuse melts, and the movable frame will be pulled upward by the tension spring, so that the sealing plate can seal the ventilation slot in time, reduce oxygen entry, and prevent the fire from spreading. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the left sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the rear cross-sectional structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the right-side cross-sectional structure of this utility model.

[0018] In the diagram: 1. Variable frequency control cabinet body; 2. Extension shell; 3. Heat dissipation fins; 4. Heat dissipation hole; 5. Ventilation slot; 6. Temperature sensor; 7. Leakage sensor; 8. Controller; 9. Audible and visual alarm; 10. Movable enclosure mechanism; 11. Enclosure plate; 12. Pull rod; 13. Movable frame; 14. Tension spring; 15. Fuse; 16. Support rod; 17. Sealing plug; 18. Slider; 19. Slide groove; 20. Protective frame; 21. Rear cover; 22. Fireproof sealing cover. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 4 As shown, the present invention provides an automatic alarm device for a frequency converter control cabinet, comprising an extension shell 2 fixedly connected to the rear side of the frequency converter control cabinet body 1 and heat dissipation fins 3 disposed on the back of the frequency converter control cabinet body 1. The rear end of the heat dissipation fins 3 extends into the interior of the extension shell 2. A heat dissipation hole 4 is provided on the top of the extension shell 2, and a cooling fan is disposed inside the heat dissipation hole 4. Ventilation slots 5 are provided on both the left and right sides of the extension shell 2. A temperature sensor 6 is fixedly connected to the top of the inner wall of the extension shell 2. A leakage current sensor 7 is fixedly connected to the rear of the bottom of the inner wall of the extension shell 2. A controller 8 is fixedly connected to the front of the bottom of the inner wall of the extension shell 2. A controller 8 is fixedly connected to the left side of the extension shell 2. There is an audible and visual alarm 9. The controller 8 is electrically connected to the temperature sensor 6, the leakage current sensor 7 and the audible and visual alarm 9 respectively. The leakage current sensor 7 is electrically connected to the power input line of the variable frequency control cabinet body 1. It can detect the leakage current in the line in real time. Once the leakage current exceeds the safety threshold, it will send a leakage abnormality signal to the controller 8. A movable sealing mechanism 10 is slidably connected to the upper part of the inside of the extension shell 2. The lower part of the left and right sides of the extension shell 2 is provided with a sandwich groove communicating with the ventilation groove 5. A sealing plate 11 is slidably connected inside the sandwich groove. The movable sealing mechanism 10 is fixedly connected to the top of the sealing plate 11 through the pull rod 12.

[0021] refer to Figure 3 The movable enclosure mechanism 10 includes a movable frame 13 that is slidably connected to the upper part of the inside of the extension shell 2. Tension springs 14 are fixedly connected to the left and right sides of the top of the movable frame 13. The top of the tension springs 14 is fixedly connected to the top of the inner wall of the extension shell 2. Fuse wires 15 are fixedly connected to the left and right sides of the bottom of the movable frame 13. The bottom of the fuse wires 15 is fixedly connected to the inner wall of the extension shell 2 through a connecting block.

[0022] As a technical optimization of this utility model, by setting up the movable frame 13, the tension spring 14 and the fuse 15 in combination, the movable frame 13 is fixed at the bottom by the fuse 15, and the tension spring 14 is in a stretched state. When a high temperature fire occurs, the fuse 15 melts, and the movable frame 13 will be pulled upward by the tension spring 14, so that the sealing plate 11 can seal the ventilation slot 5 in time, reduce the oxygen entering, and prevent the fire from spreading.

[0023] refer to Figure 3A support rod 16 is fixedly connected to the top of the movable frame 13, and a sealing plug 17 is fixedly connected to the top of the support rod 16. The sealing plug 17 and the heat dissipation hole 4 are on the same axis, and the diameter of the sealing plug 17 is the same as the diameter of the heat dissipation hole 4.

[0024] As a technical optimization of this utility model, by setting the support rod 16 and the sealing plug 17 in cooperation, when the fuse 15 melts and the moving frame 13 moves upward, it drives the support rod 16 and the sealing plug 17 to move upward, so that the sealing plug 17 enters the heat dissipation hole 4 and seals the heat dissipation hole 4, which further improves the effect of blocking oxygen from entering and avoids the spread of fire.

[0025] refer to Figure 2 The left and right sides of the movable frame 13 are fixedly connected with sliders 18, and the left and right sides of the inner wall of the extension shell 2 are provided with grooves 19 that cooperate with the sliders 18. The surface of the sliders 18 is slidably connected to the inner wall of the grooves 19.

[0026] As a technical optimization of this utility model, by setting the slider 18 and the slide groove 19 to work together, when the moving frame 13 moves upward, the slider 18 slides upward inside the slide groove 19, which has the effect of limiting and reinforcing the moving frame 13, so that it can only move vertically upward, avoiding the situation where the moving frame 13 tilts when moving, affecting its use, and making its upward movement smoother.

[0027] refer to Figure 1 The left and right sides of the extension shell 2 are movably connected by bolts to a protective frame 20 located outside the ventilation slot 5, and a dustproof net is installed inside the protective frame 20.

[0028] As a technical optimization of this utility model, by setting a protective frame 20 with a protective net, the air entering the extension shell 2 from the ventilation slot 5 can be filtered during normal use of the device, reducing dust adhesion inside the device and improving sensitivity. The protective net can be easily disassembled for cleaning and replacement by fixing it with bolts.

[0029] refer to Figure 4 The back of the extension shell 2 is movably connected to the rear cover 21 by bolts. The front of the rear cover 21 is fixedly connected to the fireproof sealing cover 22. The surface of the fireproof sealing cover 22 is in contact with the inner wall of the extension shell 2. Rock wool fireproof layer is provided around the inner wall of the extension shell 2.

[0030] As a technical optimization of this utility model, the rear cover 21 and the fireproof sealing cover 22 can be disassembled by turning the bolts to facilitate daily maintenance. When abnormal temperature or fire occurs, the fireproof sealing cover 22 seals and protects the rear of the device, further improving the protection effect and increasing the alarm response time. By setting the rock wool fireproof layer, the overall fireproof performance of the extension shell 2 is improved, so that maintenance personnel have sufficient time to deal with the alarm.

[0031] The controller 8 uses existing technology products, such as a low-power STM32 microcontroller or a Siemens S7-200CN controller.

[0032] The working principle and usage process of this utility model are as follows: By setting heat dissipation fins 3, the front of the heat dissipation fins 3 absorbs the heat emitted by the inverter control cabinet body 1 during operation, and then dissipates it through the fins distributed on its surface. The heat is exhausted by the cooling fan set inside the heat dissipation hole 4. External air enters the extension shell 2 through the ventilation slot 5 to increase the air flow speed and accelerate heat dissipation. When the internal working components of the inverter control cabinet body 1 experience abnormal temperature rise, the temperature of the heat dissipation fins 3 increases, causing the internal temperature of the extension shell 2 to rise. The temperature sensor 6 sends a signal to the controller 8, controlling the internal components of the inverter control cabinet body 1 to stop working and cut off the power supply. At the same time, the audible and visual alarm 9 sounds an alarm and flashes. When an open flame appears, the internal temperature of the extension shell 2 rises rapidly, the fuse 15 melts, and the moving frame 13, no longer pulled by the fuse 15, moves upward under the tension of the tension spring 14. The upward movement of the moving frame 13 drives the sealing plate 11 and the sealing plug 17 to move upward. The upward movement of the sealing plate 11 seals the ventilation slot 5, and the sealing plug 17 enters the heat dissipation hole 4 to seal it, reducing the entry of oxygen. This achieves the advantages of detecting the temperature of the frequency converter control cabinet, promptly triggering audible and visual alarms in case of high temperature or leakage, and simultaneously sealing the alarm device to retard flames in case of fire, preventing the spread of fire, and allowing maintenance personnel to arrive in time to handle the situation, thus increasing the alarm response and processing time.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable frequency control cabinet automatic alarm device, comprising a variable frequency control cabinet body (1), characterized in that: The system includes an extension shell (2) fixedly connected to the rear side of the inverter control cabinet body (1) and heat dissipation fins (3) disposed on the back of the inverter control cabinet body (1). The rear end of the heat dissipation fins (3) extends into the interior of the extension shell (2). A heat dissipation hole (4) is provided on the top of the extension shell (2). A cooling fan is provided inside the heat dissipation hole (4). Ventilation slots (5) are provided on both the left and right sides of the extension shell (2). A temperature sensor (6) is fixedly connected to the top of the inner wall of the extension shell (2). A leakage current sensor (7) is fixedly connected to the rear of the bottom of the inner wall of the extension shell (2). A controller (8) is fixedly connected to the front of the bottom of the inner wall. An audible and visual alarm (9) is fixedly connected to the left side of the extended shell (2). The controller (8) is electrically connected to the temperature sensor (6), the leakage current sensor (7), and the audible and visual alarm (9). A movable sealing mechanism (10) is slidably connected to the upper part of the inside of the extended shell (2). A sandwich groove communicating with the ventilation groove (5) is opened on the lower part of both sides of the extended shell (2). A sealing plate (11) is slidably connected inside the sandwich groove. The movable sealing mechanism (10) is fixedly connected to the top of the sealing plate (11) through a pull rod (12).

2. The automatic alarm device of the frequency conversion control cabinet according to claim 1, characterized in that: The movable enclosure mechanism (10) includes a movable frame (13) slidably connected to the upper part of the inside of the extension shell (2). Tension springs (14) are fixedly connected to the left and right sides of the top of the movable frame (13). The top of the tension springs (14) is fixedly connected to the top of the inner wall of the extension shell (2). Fuse wires (15) are fixedly connected to the left and right sides of the bottom of the movable frame (13). The bottom of the fuse wires (15) is fixedly connected to the inner wall of the extension shell (2) through a connecting block.

3. The automatic alarm device of the frequency conversion control cabinet according to claim 2, characterized in that: The top of the mobile frame (13) is fixedly connected to a support rod (16), and the top of the support rod (16) is fixedly connected to a sealing plug (17). The sealing plug (17) and the heat dissipation hole (4) are on the same axis, and the diameter of the sealing plug (17) is the same as the diameter of the heat dissipation hole (4).

4. The automatic alarm device for a frequency converter control cabinet according to claim 2, characterized in that: The movable frame (13) is fixedly connected to sliders (18) on both the left and right sides. The inner wall of the extension shell (2) is provided with grooves (19) on both the left and right sides to cooperate with the sliders (18). The surface of the slider (18) is slidably connected to the inner wall of the groove (19).

5. The automatic alarm device for a frequency converter control cabinet according to claim 1, characterized in that: The left and right sides of the extended shell (2) are movably connected by bolts to a protective frame (20) located outside the ventilation slot (5), and a dustproof net is provided inside the protective frame (20).

6. The automatic alarm device for a frequency converter control cabinet according to claim 1, characterized in that: The back of the extended shell (2) is movably connected to a rear cover (21) by bolts. A fireproof sealing cover (22) is fixedly connected to the front of the rear cover (21). The surface of the fireproof sealing cover (22) is in contact with the inner wall of the extended shell (2). Rock wool fireproof layer is provided around the inner wall of the extended shell (2).

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