Protective structure of frequency converter for elevator

Abstract

The utility model discloses a protection structure of a frequency converter for an elevator, which comprises a frequency converter body, an air inlet groove, a heat dissipation groove and a filter screen, and the air inlet groove is arranged on the left side of the frequency converter body. According to the utility model, by arranging the heat dissipation fan row, when the temperature in the frequency converter body is too high to prevent normal operation of the frequency converter body, the heat dissipation fan row can be started, so that the input end of the heat dissipation fan row quickly pumps out hot air in the frequency converter body through the heat dissipation groove, and the speed of external air entering the frequency converter body from the air inlet groove is accelerated; the problems that when parts inside the frequency converter operate at high load for a long time, the temperature inside the frequency converter rises sharply, but air inside the frequency converter cannot meet the requirement for heat dissipation of the parts inside the frequency converter only through natural circulation and ventilation of the air inlet grooves and the heat dissipation grooves, so that a frequency converter body is short-circuited or damaged due to overheating, and the service life of the frequency converter is prolonged are solved. Therefore, the problem that the frequency converter body is overheated is solved, and the effect of preventing the frequency converter body from being overheated is achieved.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, specifically to the protective structure of frequency converters for elevators. Background Technology

[0002] A frequency converter is a power device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of the motor's operating power supply. The switching frequency converter used in elevators ensures the stable operation of the elevator and facilitates safe use by the user.

[0003] For example, application number CN202123014311.8 discloses a special frequency converter for elevators, belonging to the field of frequency converter technology. It includes a frequency converter body, a small air pump fixedly connected to the upper surface of the frequency converter body, an air tank located at the front of the small air pump, and the air tank fixedly connected to the upper surface of the frequency converter body. A dustproof box is fixedly connected to the inner wall of the frequency converter body, with a filter screen inside the dustproof box and an annular air pipe outside the filter screen. An air jet is fixedly connected to the side surface of the annular air pipe, and the upper surface of the annular air pipe is fixedly connected to both ends of the air tank via an air inlet pipe. A fixing plate is located at the rear of the frequency converter body, with a buffer mechanism inside the fixing plate. Heat dissipation holes are provided on both sides of the frequency converter body. The beneficial effects of this utility model are: it prevents poor contact of electronic components in the frequency converter, thus extending the service life of the frequency converter; secondly, it improves the safe operation performance of the elevator and reduces the occurrence of safety accidents.

[0004] Based on the aforementioned patent searches and the findings of existing equipment, while the aforementioned equipment can address the issue of dust accumulation in current frequency converters due to heat dissipation, and the fact that the connection points of electronic components in frequency converters are generally exposed, leading to poor contact and shortened lifespan due to dust accumulation over time, and potentially causing safety accidents and reducing the safe operation of elevators, there are still issues. During operation, when the internal components of the frequency converter are running under high load for extended periods, their internal temperature rises sharply. At this time, the air inside the frequency converter, ventilated only through natural airflow in the air intake and cooling channels, cannot meet the heat dissipation needs of the internal components. This can lead to overheating of the frequency converter itself, causing short circuits or damage, posing a safety hazard to elevator operation. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a protective structure for elevator frequency converters, which has the advantage of preventing the frequency converter body from overheating. It solves the problem that when the internal components of the frequency converter are running under high load for a long time, the internal temperature will rise sharply. However, at this time, the air inside the frequency converter can only be ventilated through the natural circulation of the air intake slot and the heat dissipation slot, which cannot meet the heat dissipation needs of the internal components. This can lead to the frequency converter body overheating, causing short circuits or damage, and posing a safety hazard to the operation of the elevator.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a protective structure for an elevator frequency converter, comprising a frequency converter body, an air inlet slot, a heat dissipation slot, and a filter screen. The air inlet slot is located on the left side of the frequency converter body, and the heat dissipation slot is located on the right side of the frequency converter body. Several heat dissipation slots are provided and are evenly distributed. The surface of the filter screen is fixedly connected to the left side of the inner wall surface of the air inlet slot. A heat dissipation fan is provided on the right side of the frequency converter body, and plug-in components are fixedly connected to both sides of the heat dissipation fan. A temperature sensing component is fixedly connected to the top right side of the rear inner wall of the frequency converter body.

[0007] As a preferred embodiment of this utility model, the plug-in assembly includes a trapezoidal rod, the inner side of which is fixedly connected to both sides of the heat dissipation fan, and a plug-in block is slidably connected to the surface of the trapezoidal rod. The left side of the plug-in block is fixedly connected to both sides of the right side of the inverter body.

[0008] In a preferred embodiment of this invention, the temperature sensing component includes a temperature sensor, the back of which is fixedly connected to the bottom of the rear side of the inner wall of the inverter body, and a controller is provided on the right side of the temperature sensor, the back of which is fixedly connected to the rear side of the inner wall of the inverter body. The temperature sensor and the heat dissipation fan are both electrically connected to the controller via wires.

[0009] As a preferred embodiment of this utility model, an air intake fan is fixedly connected to the left side of the inner wall of the inverter body, and the air intake fan is electrically connected to the controller via a wire.

[0010] As a preferred embodiment of this invention, a protective mesh cover is movably connected to the right side of the inverter body, and the cooling fan is located inside the protective mesh cover.

[0011] As a preferred embodiment of this utility model, mounting blocks are fixedly connected to the rear sides of both sides of the protective mesh cover, and wing bolts are threadedly connected to the inner wall of the mounting blocks. The left thread of the wing bolts extends through to both sides of the right side of the inverter body.

[0012] As a preferred embodiment of this utility model, a groove is provided on the inner side of the bottom of the mounting block, and a support positioning block is slidably connected to the inner wall of the groove. The left side of the support positioning block is fixedly connected to the right side of the inverter body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, by setting up a cooling fan, can activate the cooling fan when the temperature inside the inverter body is too high during normal operation. The fan, through the heat dissipation slots, rapidly extracts hot air from inside the inverter body and accelerates the entry of external air into the inverter body from the air intake slots. This quickly lowers the internal temperature of the inverter body, solving the problem that when the internal components of the inverter operate under high load for extended periods, the internal temperature rises sharply. However, the air inside the inverter, relying solely on natural airflow through the air intake and heat dissipation slots, cannot meet the heat dissipation needs of the internal components, potentially leading to overheating, short circuits, or damage to the inverter body, posing a safety hazard to elevator operation. This invention effectively prevents the inverter body from overheating.

[0015] 2. This utility model, by setting up a plug-in component, allows the user to quickly and stably install the cooling fan on the right side of the inverter body, connecting it to the heat dissipation slot, by holding the cooling fan and aligning the trapezoidal rods on both sides of it with the inner wall of the plug-in block, and then inserting it. Through the plug-in cooperation between the trapezoidal rods and the plug-in block, the cooling fan can be installed quickly and stably on the right side of the inverter body, connecting it to the heat dissipation slot. This also makes it easy to quickly disassemble the cooling fan when it is damaged or needs maintenance, thereby improving the user's ease of operation.

[0016] 3. This utility model, by setting a temperature sensing component, allows the cooling fan to automatically start when the internal temperature of the inverter body is too high. First, a temperature threshold is set in the controller. Then, the temperature sensor continuously transmits the internal temperature data of the inverter body to the controller via wires. When the temperature exceeds the threshold set in the controller, the controller automatically starts the cooling fan, which quickly extracts the hot air from the inverter body, achieving rapid cooling. Then, when the controller receives the temperature data transmitted back from the temperature sensor and knows that the internal temperature of the inverter body is below the threshold, the controller automatically shuts off the cooling fan, thereby improving the user's ease of operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the protective mesh cover of this utility model;

[0019] Figure 3 This is a cross-sectional view of the main body of the frequency converter of this utility model and an exploded view of some parts.

[0020] In the diagram: 1. Inverter body; 2. Air inlet slot; 3. Heat dissipation slot; 4. Filter screen; 5. Cooling fan radiator; 6. Plug-in assembly; 61. Trapezoidal rod; 62. Plug-in block; 7. Temperature sensing assembly; 71. Temperature sensor; 72. Controller; 8. Air inlet fan radiator; 9. Protective mesh cover; 10. Mounting block; 11. Wing bolt; 12. Groove; 13. Support positioning block. Detailed Implementation

[0021] 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.

[0022] like Figures 1 to 3 As shown, the protective structure of the elevator frequency converter provided by this utility model includes a frequency converter body 1, an air inlet slot 2, a heat dissipation slot 3, and a filter screen 4. The air inlet slot 2 is located on the left side of the frequency converter body 1, and the heat dissipation slot 3 is located on the right side of the frequency converter body 1. Several heat dissipation slots 3 are provided and are distributed at equal intervals. The surface of the filter screen 4 is fixedly connected to the left side of the inner wall surface of the air inlet slot 2. A heat dissipation fan 5 is provided on the right side of the frequency converter body 1. Plug-in components 6 are fixedly connected to both sides of the heat dissipation fan 5. A temperature sensing component 7 is fixedly connected to the top right side of the rear inner wall of the frequency converter body 1.

[0023] refer to Figure 2 The plug-in assembly 6 includes a trapezoidal rod 61, the inner side of which is fixedly connected to both sides of the cooling fan 5, and a plug-in block 62 is slidably connected to the surface of the trapezoidal rod 61. The left side of the plug-in block 62 is fixedly connected to both sides of the right side of the inverter body 1.

[0024] As a technical optimization of this utility model, by setting up the plug-in component 6, when the user needs to install the cooling fan 5 on the right side of the inverter body 1 and connect it with the heat dissipation slot 3, he / she holds the cooling fan 5, aligns the trapezoidal rods 61 on both sides of it with the inner wall of the plug-in block 62, and then inserts it. Through the plug-in cooperation between the trapezoidal rods 61 and the plug-in block 62, the cooling fan 5 is quickly and stably installed on the right side of the inverter body 1 and connected with the heat dissipation slot 3. This makes it easy to quickly disassemble the cooling fan 5 when it is damaged or needs maintenance, thereby improving the user's ease of operation.

[0025] refer to Figure 3The temperature sensing component 7 includes a temperature sensor 71. The back of the temperature sensor 71 is fixedly connected to the bottom of the rear side of the inner wall of the inverter body 1. A controller 72 is provided at the bottom of the temperature sensor 71. The back of the controller 72 is fixedly connected to the rear side of the inner wall of the inverter body 1. The temperature sensor 71 and the heat dissipation fan 5 are both electrically connected to the controller 72 through wires.

[0026] As a technical optimization of this utility model, by setting a temperature sensing component 7, when the user needs the internal temperature of the inverter body 1 to be too high and the cooling fan 5 to start automatically, a temperature threshold is first set in the controller 72. Then, the temperature sensor 71 continuously transmits the internal temperature data of the inverter body 1 to the controller 72 through wires. When the temperature is higher than the threshold set in the controller 72, the controller 72 will automatically start the cooling fan 5, so that the cooling fan 5 can quickly extract the hot air inside the inverter body 1 to achieve rapid cooling. Then, when the controller 72 learns from the temperature data transmitted back by the temperature sensor 71 that the internal temperature of the inverter body 1 is lower than the threshold, the controller 72 will automatically turn off the cooling fan 5, thereby improving the user's ease of operation.

[0027] refer to Figure 3 An air intake fan 8 is fixedly connected to the left side of the inner wall of the inverter body 1. The air intake fan 8 is electrically connected to the controller 72 through wires.

[0028] As a technical optimization of this utility model, by setting an intake fan 8, when the temperature inside the inverter body 1 is higher than the threshold set in the controller 72, the controller 72 automatically starts the cooling fan 5, and the intake fan 8 starts at the same time. This allows it to quickly blow external cold air into the inverter body 1 through the input end, after being filtered by the filter screen 4. Then, through the exhaust effect of the cooling fan 5, the external cold air circulates quickly inside the inverter body 1, rapidly cooling its internal components, thereby further improving the heat dissipation and protection effect.

[0029] refer to Figure 1 and Figure 2 A protective mesh cover 9 is movably connected to the right side of the inverter body 1, and the cooling fan 5 is located inside the protective mesh cover 9.

[0030] As a technical optimization of this utility model, by setting a protective mesh cover 9, the exposed external heat dissipation fan 5 is covered, protecting the heat dissipation fan 5 from impact and damage by external objects, so as to prevent it from affecting its normal operation and interfering with its heat dissipation effect on the inside of the inverter body 1, thereby improving the stability of the heat dissipation fan 5.

[0031] refer to Figure 2Mounting blocks 10 are fixedly connected to the rear sides of both sides of the protective net cover 9. The inner wall of the mounting block 10 is threaded with a wing bolt 11. The left thread of the wing bolt 11 extends through to both sides of the right side of the inverter body 1.

[0032] As a technical optimization of this utility model, by setting the mounting block 10 and the wing bolt 11, the protective mesh cover 9 is securely installed on the right side of the inverter body 1. The wing bolt 11 facilitates manual tightening, allowing users to easily disassemble or install the protective mesh cover 9. This also facilitates the maintenance of the cooling fan 5 inside the protective mesh cover 9, thereby improving the user's ease of operation.

[0033] refer to Figure 2 The mounting block 10 has a groove 12 on the inner side of its bottom. A support positioning block 13 is slidably connected to the inner wall of the groove 12. The left side of the support positioning block 13 is fixedly connected to the right side of the inverter body 1.

[0034] As a technical optimization of this utility model, by setting the groove 12 and the support positioning block 13, when the user installs the protective net cover 9 on the right side of the inverter body 1 using the wing bolt 11 and the mounting block 10, the groove 12 on the mounting blocks 10 on both sides of the protective net cover 9 can be first inserted into the support positioning block 13, so that the protective net cover 9 is supported first. At the same time, the screw hole on the mounting block 10 is connected with the screw hole on the inverter body 1, so that the user can screw in the wing bolt 11 and make the protective net cover 9 firmly connected to the inverter body 1, thereby improving the user's work efficiency.

[0035] The working principle and usage process of this utility model are as follows: First, the inverter body 1 is installed inside the elevator using bolts and powered on. Then, the cooling fan 5 is held, and its trapezoidal rods 61 on both sides are aligned with the inner wall of the plug-in block 62 and inserted. Through the insertion and engagement of the trapezoidal rods 61 and the plug-in block 62, the cooling fan 5 is quickly and stably installed on the right side of the inverter body 1, connecting to the heat dissipation slot 3. Next, a temperature threshold is set in the controller 72. Then, the temperature sensor 71 continuously transmits the temperature data inside the inverter body 1 to the controller 72 via wires. When the internal components of the inverter operate under high load for an extended period, causing a rapid increase in the internal temperature, the temperature data transmitted by the temperature sensor 71 to the controller 72 exceeds the set temperature threshold. The controller 72 then sends a start signal to the cooling fan 5 and the intake fan 8 via wires. The input end of the intake fan 8 then quickly draws in external cold air through the filter. The air is filtered by 4 and quickly blown into the inverter body 1, mixing with the hot air inside the inverter body 1 to initially reduce the temperature of the components inside the inverter body 1. Then, the input end of the cooling fan 5 quickly extracts the hot air inside the inverter body 1 through the heat dissipation slot 3. Subsequently, through the combined effect of the intake fan 8 and the cooling fan 5, the outside cold air is quickly circulated inside the inverter body 1, further cooling the components inside the inverter body 1. Then, when the controller 72 learns from the temperature data transmitted back by the temperature sensor 71 that the temperature inside the inverter body 1 is below the threshold, the intake fan 8 and the cooling fan 5 are shut down together. This ultimately prevents the inverter body 1 from overheating and causing short circuits or damage due to the hot air inside the inverter body being unable to meet the heat dissipation needs of the components due to the natural circulation of air through the intake slot 2 and the heat dissipation slot 3 under long-term high-load operation, thus posing a safety hazard to the operation of the elevator. This provides the advantage of preventing the inverter body 1 from overheating.

[0036] In summary, the protective structure of this elevator inverter, by incorporating a cooling fan 5, allows for rapid extraction of hot air from the inverter body 1 through the heat dissipation slot 3 when the internal temperature becomes excessively high during normal operation. This also accelerates the entry of external air into the inverter body 1 via the air intake slot 2, thus rapidly reducing the internal temperature of the inverter body 1. This solves the problem that when the internal components of the inverter operate under high load for extended periods, the internal temperature rises sharply. However, the air inside the inverter, relying solely on natural airflow through the air intake and heat dissipation slots, is insufficient to meet the cooling needs of the internal components, potentially leading to overheating, short circuits, or damage to the inverter body, posing a safety hazard to the elevator operation.

[0037] 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.

[0038] 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 protective structure of a frequency converter for an elevator, comprising a frequency converter body (1), an air inlet groove (2), a heat dissipation groove (3) and a filter screen (4), characterized in that: The air inlet groove (2) is arranged on the left side of the frequency converter body (1), the heat dissipation groove (3) is arranged on the right side of the frequency converter body (1), the heat dissipation groove (3) is arranged with a plurality of and equidistantly distributed, the surface of the filter screen (4) is fixedly connected with the left side of the inner wall surface of the air inlet groove (2), the right side of the frequency converter body (1) is provided with a heat dissipation fan row (5), both sides of the heat dissipation fan row (5) are fixedly connected with plug-in assemblies (6), and the rear right top of the inner wall of the frequency converter body (1) is fixedly connected with a temperature sensing assembly (7).

2. The protection structure for a frequency inverter for an elevator according to claim 1, characterized in that: The plug-in assembly (6) comprises a trapezoidal rod (61), the inner side of the trapezoidal rod (61) is fixedly connected with both sides of the heat dissipation fan row (5), and the surface of the trapezoidal rod (61) is slidably connected with a plug-in block (62).

3. The protective structure for a frequency inverter for an elevator according to claim 1, characterized in that: The temperature sensing assembly (7) comprises a temperature sensor (71), the back of the temperature sensor (71) is fixedly connected with the bottom of the rear side of the inner wall of the frequency converter body (1), the right side of the temperature sensor (71) is provided with a controller (72), the back of the controller (72) is fixedly connected with the rear side of the inner wall of the frequency converter body (1), and the temperature sensor (71) and the heat dissipation fan row (5) are electrically connected with the controller (72) through wires.

4. The protection structure for a frequency inverter for an elevator according to claim 3, characterized in that: The left side of the inner wall of the frequency converter body (1) is fixedly connected with an air inlet fan row (8), and the air inlet fan row (8) is electrically connected with the controller (72) through wires.

5. The protective structure for a frequency inverter for an elevator according to claim 1, characterized in that: The right side of the frequency converter body (1) is movably connected with a protective screen cover (9), and the heat dissipation fan row (5) is located in the interior of the protective screen cover (9).

6. The protection structure for a frequency inverter for an elevator according to claim 5, characterized in that: The rear sides of both sides of the protective screen cover (9) are fixedly connected with mounting blocks (10), the inner walls of the mounting blocks (10) are threadedly connected with butterfly bolts (11), and the left sides of the butterfly bolts (11) are threadedly penetrated to both sides of the right side of the frequency converter body (1).

7. The protection structure for a frequency inverter for an elevator according to claim 6, characterized in that: The inner side of the bottom of the mounting block (10) is provided with a groove (12), the inner wall of the groove (12) is slidably connected with a supporting positioning block (13), and the left side of the supporting positioning block (13) is fixedly connected with the right side of the frequency converter body (1).

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