Elevator frequency converter structure

Abstract

An elevator frequency converter structure relates to the technical field of frequency converters and comprises a frequency converter body, the frequency converter body comprises a mounting shell of a U-shaped structure and a back plate connected with the mounting shell, a mounting space is formed between the mounting shell and the back plate, and the upper side and the lower side of the mounting space are sealed through an air deflector and an air inlet plate. The frequency converter comprises a mounting shell, a mounting space is formed in the mounting shell, a radiator is fixedly mounted in the mounting space, fan assemblies are symmetrically and detachably arranged on the two sides of the top of the mounting shell, an air inlet is formed in the back plate, and the air inlet is located between the lower end face of the radiator and the air inlet plate. The service life is obviously prolonged, the failure rate is reduced, and the equipment is more efficient due to the compact layout and the high space utilization rate; meanwhile, left and right air outlet of the fan and sealing of the top surface of the air duct are realized, impurities are difficult to fall into a fan operation area, the failure rate of the fan is greatly reduced, and the service life of the fan can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to frequency converter technical field, concretely relates to an elevator frequency converter structure. BACKGROUND

[0002] With the acceleration of urbanization process, the construction quantity of high-rise buildings presents the trend of rapid growth. As the indispensable vertical traffic tool in high-rise buildings, the market demand of elevators also greatly increases. The stability and reliability of elevator system are crucial to ensure the safety of passengers and improve the use efficiency of buildings.

[0003] The elevator frequency converter plays an important role as the core component of the elevator control system. It uses frequency conversion technology and microelectronic technology to realize effective control of the alternating current motor by accurately adjusting the frequency of the motor power supply, and then controls the operation of the elevator traction machine. This technology not only improves the operation efficiency of the elevator, but also significantly enhances the comfort and safety of the elevator. Therefore, the performance and quality of the elevator frequency converter are one of the important indicators to measure the reliable operation of the elevator system.

[0004] However, in the actual application process of the elevator frequency converter, some problems need to be solved. First of all, due to the large power of the power module inside the frequency converter, the heat dissipation is high, so it is necessary to configure fans, heat sinks and other heat dissipation equipment to ensure the normal work of the frequency converter. However, the traditional heat dissipation air duct design often uses a vertical air duct with the bottom inlet and the top outlet, and the top outlet of the frequency converter is open upward. Although this design is simple, it is easy to be affected by elevator construction or shaft, machine room decoration and other factors, which leads to the entry of foreign matters into the fan, causing the fan to jam or damage, thereby increasing the failure rate.

[0005] Secondly, as a vulnerable part of the frequency converter, the fan has a relatively short maintenance cycle. Compared with the design life of 15 years of the elevator, the fan may need to be maintained or replaced every 2-3 years. However, since the frequency converter is installed inside the control cabinet, the fan has poor observability and maintainability, which brings inconvenience to the maintenance personnel.

[0006] In addition, the installation method of the frequency converter inside the control cabinet also has an adverse effect on its heat dissipation effect. When the air is directly inhaled from the bottom, the relatively hot air inside the control cabinet is inhaled, which is not conducive to the heat dissipation of the power module, which may increase the temperature rise of the power module and reduce its expected service life. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing an elevator frequency converter structure to solve the problems of unreasonable heat dissipation air duct design, vulnerable fan and difficult maintenance, and poor heat dissipation effect of the elevator frequency converter in the application process.

[0008] To solve the above technical problems, the utility model adopts the technical scheme that

[0009] An elevator frequency converter structure, including frequency converter body, the frequency converter body includes the installation shell of U type structure and the backboard that is connected with the installation shell, the installation space is formed between the installation shell and backplate, the upper and lower sides of installation space are sealed through the air deflector, the air inlet plate, the radiator is fixedly installed in the installation space, the air inlet is arranged on the backplate, the air inlet is located between the lower end surface of the radiator and the air inlet plate position, the installation shell, backplate, air inlet plate, air deflector form the heat dissipation air duct, wherein, the cold air flow is from the air inlet of backplate and forms the hot air through the radiator and takes away the heat, and the hot air is discharged to the left and right sides from the fan assembly.

[0010] Further, the left and right sides of the front of the installation shell are provided with mounting holes for mounting the fan assembly, the size of the mounting hole matches the vertical section of the fan assembly installation direction, the fan assembly includes a heat dissipation fan and a fan mounting plate fixedly installed with the heat dissipation fan, and the fan mounting plate is fixedly installed in the mounting hole through the fixing member.

[0011] Further, the backplate is also U-shaped structure, the opening side of the installation shell is fixedly connected with the opening side bottom plate of the backplate, and a plurality of air outlet holes are arranged on the side surface of the installation shell corresponding to the positions of the fan assemblies.

[0012] Further, the air deflector is approximately T-shaped structure as a whole, the air deflector seals the top surface of the heat dissipation air duct, and the two fan assemblies are isolated and shunted.

[0013] Further, the driving plate is mounted on the front of the installation shell, the upper part of the driving plate avoids the mounting hole, so that the fan assembly is exposed, the back of the driving plate is connected with the front of the power module, and the back of the power module is in heat transfer connection with the front of the radiator.

[0014] Further, the installation shell is provided with a first avoiding hole corresponding to the position of the power module, and a plurality of bus capacitors are arranged on the back of the driving plate, and the installation shell is provided with a second avoiding hole corresponding to the position of the bus capacitor.

[0015] Further, the backplate is the backplate of the control cabinet.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The frequency converter has the characteristics of simple and reliable structure, convenient maintenance, remarkably prolonged service life and reduced failure rate, compact layout and high space utilization rate, and thus the equipment is more efficient; meanwhile, the left and right sides of the fan are used for air outlet, the top surface of the air duct is closed, it is difficult for sundries to fall into the fan operation area, the failure rate of the fan is greatly reduced, and the service life of the fan is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor.

[0019] Figure 1 It is a structural schematic view of the installation shell of the present application;

[0020] Figure 2 It is a structural schematic view of the fan assembly of the present application;

[0021] Figure 3 It is an installation schematic view of the fan assembly of the present application;

[0022] Figure 4 It is a structural schematic view of the drive plate of the present application;

[0023] Figure 5 It is an installation schematic view of the drive plate of the present application;

[0024] Figure 6 It is an assembly schematic view of the radiator of the present application;

[0025] Figure 7 It is a structural schematic view of the back plate of the present application;

[0026] Figure 8 It is a whole installation structural schematic view of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0028] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] As Figures 1-8As shown, an elevator frequency converter structure includes a frequency converter body, the frequency converter body includes a mounting shell 1 in a U-shaped structure, and a back plate 11 connected with the mounting shell 1, an installation space is formed between the mounting shell 1 and the back plate 11, the upper and lower sides of the installation space are closed through a wind guide plate 9 and an air inlet plate 10, a radiator 8 is fixedly installed in the installation space, a fan assembly 4 is symmetrically and detachably arranged on both sides of the top of the mounting shell 1, an air inlet 13 is arranged on the back plate 11, the air inlet 13 is located between the lower end surface of the radiator 8 and the air inlet plate 10, and a heat dissipation air duct is formed between the mounting shell 1, the back plate 11, the air inlet plate 10 and the wind guide plate 9; wherein, cold air flows from the air inlet 13 of the back plate 11, passes through the radiator to take away heat to form hot air, and the hot air is discharged to the left and right sides from the fan assembly 4.

[0032] The elevator frequency converter is mainly composed of a frequency converter body, and the frequency converter body includes a mounting shell 1 in a U-shaped structure and a back plate 11 connected with the mounting shell. The two parts jointly form a closed or semi-closed installation space for accommodating and protecting the main electronic components of the frequency converter. On the upper and lower sides of the installation space, the air inlet plate 10 and the wind guide plate 9 are used for sealing treatment, which is to guide and control the flow path of the air flow and ensure the heat dissipation efficiency. Inside the installation space, a radiator 8 is fixedly installed, which is the core component of the heat dissipation system and is responsible for transferring the heat generated by the frequency converter during operation to the air flowing through. On both sides of the top of the mounting shell 1, detachable fan assemblies 4 are symmetrically arranged. These fan assemblies 4 will rotate and generate suction or thrust after being powered on, helping to accelerate the flow of air flow and thus improve the heat dissipation efficiency. The back plate 11 is designed with an air inlet 13, which is located between the lower end surface of the radiator 8 and the air inlet plate 10. When the elevator frequency converter is working, the cold air outside is sucked into the installation space through the air inlet 13. The cold air will absorb the heat on the radiator 8 when flowing through the radiator 8, thus becoming hot air.

[0033] The mounting shell 1, the back plate 11, the air inlet plate 10 and the wind guide plate 9 jointly form a heat dissipation air duct. This air duct ensures that the cold air can flow along the predetermined path, that is, from the air inlet 13 of the back plate 11, through the radiator 8 for heat exchange, then becomes hot air, and finally is discharged to the left and right sides through the fan assemblies 4 on the top of the mounting shell 1.

[0034] Specifically, as shown in the drawings, Figure 1 , 2As shown in Figure 3, mounting holes 2 for mounting the fan assembly 4 are provided on the left and right sides of the front of the mounting housing 1. The size of the mounting holes 2 matches the vertical cross section of the fan assembly 4 in the mounting direction. The fan assembly 4 includes a cooling fan 41 and a fan mounting plate 42 for fixing the cooling fan 41. The fan mounting plate 42 is fixedly installed in the mounting holes 2 by fasteners.

[0035] Mounting holes 2 for mounting the fan assembly 4 are designed on the left and right sides of the front of the mounting housing 1. The dimensions of the mounting holes 2 ensure that they match the vertical cross-section of the fan assembly 4 in the mounting direction. This structure not only ensures that the fan assembly 4 can be securely installed in the mounting holes 2, but also optimizes the airflow channel, making the heat dissipation more efficient. The fan assembly 4 mainly consists of two parts: a cooling fan 41 and a fan mounting plate 42. The cooling fan 41 is a key component of the heat dissipation system, responsible for generating airflow and accelerating the transfer and dissipation of heat. The fan mounting plate 42 serves to support and fix the cooling fan 41. During installation, the fan mounting plate 42 is firmly fixed in the mounting holes 2 using fasteners (such as screws, clips, etc.). This installation method is not only simple and easy, but also has good stability and reliability. Because the mounting holes 2 match the vertical cross-section of the fan assembly 4, the cooling fan 41 can ensure smooth airflow after installation, avoiding a decrease in heat dissipation efficiency due to improper installation. In addition, the removable fan assembly 4 facilitates future maintenance. When the cooling fan 41 needs cleaning, repair or replacement, the fan assembly 4 can be removed from the mounting hole 2 simply by removing the fastener, which greatly saves maintenance time and costs.

[0036] Specifically, such as Figure 7 , 8 As shown, the back plate 11 is also a U-shaped structure. The opening side of the mounting housing 1 is fixedly connected to the bottom plate of the opening side of the back plate 11. The side of the mounting housing 1 is provided with a plurality of air outlet holes 3 corresponding to the position of the fan assembly 4. The side of the back plate 11 is provided with an air outlet 12 corresponding to the position of the air outlet holes 3.

[0037] When the elevator frequency converter is operating, it generates a large amount of heat. To maintain the normal operating temperature of the equipment, this heat needs to be dissipated promptly. At this time, the radiator 8 absorbs this heat and transfers it to the flowing air. The fan assembly 4 generates airflow by rotating, expelling the heated air from the radiator through the air outlet 3 and air vent 12 into the external environment. Cool air enters the installation space through the air inlet 13 on the back panel 11, and becomes hot air after heat exchange with the radiator 8. The hot air, under the action of the fan assembly 4, is then expelled into the external environment through the air outlet 3 and air vent 12. Throughout this process, the airflow path is continuous and smooth, ensuring maximum heat dissipation efficiency.

[0038] Specifically, as shown in Figure 6 , the air deflector 9 is approximately T-shaped in structure, enclosing the top surface of the heat dissipation air duct and isolating the two fan assemblies 4. The T-shaped design of the air deflector 9 allows it to isolate the space between the two fan assemblies 4. This means that each fan assembly 4 is responsible for expelling hot air from its respective area, avoiding the mixing and interference of hot air within the air duct. The isolated structure helps to optimize the heat dissipation effect and ensures that each fan assembly 4 can work efficiently. The shape and position of the air deflector 9 also play a role in guiding airflow. Under the action of the fan assembly 4, hot air is accelerated and expelled from the air outlet 3 and the air outlet 12. The air deflector 9 ensures that hot air can flow smoothly to the air outlet 3 without being disturbed by other area airflows.

[0039] It is worth mentioning that the air inlet plate 10 can be an independent part installed and fixed on the mounting shell 1, or it can be an integral part with the mounting shell 1; the air deflector 9 can be an independent part installed and fixed on the mounting shell 1, or it can be an integral part with the mounting shell 1.

[0040] Specifically, as shown in Figure 5 , the drive plate 7 is installed on the front of the mounting shell 1, the upper part of the drive plate 7 avoids the mounting hole 2, and the fan assembly 4 is exposed, the back of the drive plate 7 is connected to the front of the power module 6, and the back of the power module 6 is in heat transfer connection with the front of the radiator 8. When the power module 6 works, a large amount of heat will be generated. The heat is transferred to the radiator 8 through the heat transfer connection on the back of the power module 6. The exposed fan assembly 4 on the front of the frequency converter is not affected by normal disassembly and is more convenient.

[0041] Specifically, as shown in Figure 1 , 4 , the mounting shell 1 is provided with a first avoiding hole 5 corresponding to the position of the power module 6, and the back of the drive plate 7 is provided with a plurality of bus capacitors, and the mounting shell 1 is provided with a second avoiding hole 14 corresponding to the position of the bus capacitor. The first avoiding hole 5 and the second avoiding hole 14 make the overall structure more compact.

[0042] Specifically, as shown in the figure, the back plate 11 is the back plate of the control cabinet. That is, this frequency converter has no bottom plate design, and the complete air duct is formed with the help of the back plate of the control cabinet, which can save shell material and reduce cost. In addition, the structure of the frequency converter is a sheet metal structure, which can also be a plastic structure.

[0043] The frequency converter has the characteristics of simple and reliable structure, convenient maintenance, obviously prolonged service life, reduced failure rate, compact layout, high space utilization, efficient equipment, left and right side air outlet of the fan, closed top surface of the air duct, difficult falling of sundries into the fan operation area, greatly reduced fan failure rate, prolonged service life of the fan, observed fan operation condition outside the control cabinet, front maintenance design, easily and separately maintained fan assembly by only removing a small amount of screws, and effectively reduced temperature rise of the power module by bottom back air inlet design, further prolonged service life of the power module, and greatly facilitated wiring and maintenance work by front installation of the driving board.

[0044] The above merely describes preferred embodiments of the utility model, and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc.

[0045] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An elevator frequency inverter structure, characterized by, Including frequency converter body, the frequency converter body includes installation shell of U-shaped structure, and back plate connected with the installation shell, the installation space is formed between the installation shell and back plate, the upper and lower sides of installation space are closed through air deflector and air inlet plate, the radiator is fixedly installed in the installation space, the fan assembly is symmetrically and detachably arranged on both sides of the top of the installation shell, the air inlet is arranged on the back plate, the air inlet is located between the lower end surface of the radiator and the air inlet plate, the installation shell, the back plate, the air inlet plate and the air deflector form the heat dissipation air duct, wherein, the cold air flow flows into the air inlet of the back plate, passes through the radiator and carries away heat to form hot air, and the hot air is discharged to the left and right sides from the fan assembly.

2. The elevator frequency inverter structure according to claim 1, characterized in that, The installation holes for mounting the fan assembly are formed on the left and right sides of the front of the installation shell, the size of the installation hole is matched with the vertical section of the mounting direction of the fan assembly, the fan assembly comprises a heat dissipation fan and a fan mounting plate for fixedly mounting the heat dissipation fan, and the fan mounting plate is fixedly mounted in the installation hole through the fixing member.

3. The elevator frequency inverter structure according to claim 2, characterized in that, The back plate is also U-shaped structure, the opening side of the installation shell is fixedly connected with the opening side bottom plate of the back plate, and a plurality of air outlet holes are arranged on the side surface of the installation shell corresponding to the positions of the fan assemblies, and an air outlet is arranged on the side surface of the back plate corresponding to the positions of the air outlet holes.

4. The elevator frequency inverter structure according to claim 3, characterized in that, The air deflector is approximately T-shaped structure as a whole, the air deflector closes the top surface of the heat dissipation air duct, and the two fan assemblies are isolated and divided.

5. The elevator frequency inverter structure according to claim 4, characterized in that, The driving plate is mounted on the front of the installation shell, the upper part of the driving plate avoids the installation hole, so that the fan assembly is exposed, the back of the driving plate is connected with the front of the power module, and the back of the power module is in heat transfer connection with the front of the radiator.

6. The elevator frequency inverter structure of claim 5, wherein, The installation shell is provided with a first avoiding hole corresponding to the position of the power module, and the back of the driving plate is provided with a plurality of bus capacitors, and the installation shell is provided with a second avoiding hole corresponding to the position of the bus capacitor.

7. An elevator frequency inverter structure according to claim 6, characterized in that The back plate is the back plate of the control cabinet.

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