CN223885107U

CN223885107U - Elevator frequency converter structure

Info

Publication number: CN223885107U
Application number: CN202520266260.7U
Authority: CN
Inventors: 马瑞旺; 潘伟恩; 黄立明; 王鹏
Original assignee: Hitachi Building Technology Guangzhou Co Ltd
Current assignee: Hitachi Building Technology Guangzhou Co Ltd
Priority date: 2025-02-19
Filing date: 2025-02-19
Publication date: 2026-02-06
Anticipated expiration: 2035-02-19

Abstract

The utility model relates to the technical field of frequency converters, in particular to an elevator frequency converter structure, which comprises a frequency converter body, wherein the frequency converter body comprises a mounting shell with 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, the upper side and the lower side of the mounting space are airtight through an air deflector and an air inlet plate, a radiator is fixedly arranged in the mounting space, fan components are symmetrically and detachably arranged on the two sides of the top of the mounting shell, an air inlet is arranged on the back plate, and the air inlet is positioned between the lower end surface of the radiator and the air inlet plate.

Description

Elevator frequency converter structure

Technical Field

The utility model relates to the technical field of frequency converters, in particular to an elevator frequency converter structure.

Background

With the acceleration of the urban process, the number of high-rise buildings is rapidly increasing. As an indispensable vertical vehicle in high-rise buildings, the market demand for elevators has also increased considerably. Stability and reliability of elevator systems are critical to ensuring passenger safety and improving building efficiency.

The elevator frequency converter plays a vital role as a core component of the elevator control system. The frequency conversion technology and the microelectronic technology are utilized, and the effective control of the alternating current motor is realized by accurately adjusting the frequency of the working power supply of the motor, so that the operation of the elevator traction machine is controlled. The technology not only improves the running efficiency of the elevator, but also obviously enhances the comfort and safety of the elevator. Therefore, the performance and quality of the elevator frequency converter are one of the important indicators for measuring the reliable operation of the elevator system.

However, in the practical application process of the elevator frequency converter, some problems to be solved are also exposed. Firstly, because the power of the power module in the frequency converter is larger and the heating value is higher, heat dissipation equipment such as a fan, a radiator and the like needs to be configured to ensure the normal operation of the frequency converter. However, the conventional heat dissipation air duct design often adopts a vertical air duct with a lower inlet and an upper outlet, and the top air outlet of the frequency converter is opened upwards.

Secondly, the fan is used as a wearing part of the frequency converter, and the maintenance period of the fan is relatively short. In contrast to the design life of elevators as long as 15 years, fans may need to be maintained or replaced every 2-3 years. However, since the frequency converter is installed inside the control cabinet, the fan is poor in observability and maintainability, and inconvenience is brought to maintenance personnel.

In addition, the installation mode of the frequency converter in the control cabinet also has adverse effect on the heat dissipation effect. When the air is directly introduced from the bottom, the hot air flow in the control cabinet is sucked, which is unfavorable for heat dissipation of the power module, and can cause the temperature rise of the power module to be increased, so that the expected service life of the power module is reduced.

Disclosure of utility model

The utility model aims to provide an elevator frequency converter structure so as to solve the problems that an elevator frequency converter is unreasonable in design of a heat dissipation air duct, easy to damage a fan, difficult to maintain, poor in heat dissipation effect and the like in the application process.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The elevator frequency converter structure comprises a frequency converter body, wherein the frequency converter body comprises a mounting shell body and a back plate, the mounting shell body is of a U-shaped structure, the back plate is connected with the mounting shell body, a mounting space is formed between the mounting shell body and the back plate, the upper side and the lower side of the mounting space are sealed through air deflectors and air inlet plates, 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 body, an air inlet is formed in the back plate, the air inlet is located at the position between the lower end face of the radiator and the air inlet plates, a heat dissipation air channel is formed among the mounting shell body, the back plate, the air inlet of the back plate, the air flow of cold air flow flows in, heat is taken away through the radiator to form hot air, and the hot air is discharged from the left side and the right side of the fan assemblies.

Further, the mounting holes for mounting the fan assembly are formed in the left side and the right side of the front face of the mounting shell, the size of the mounting holes is matched with the vertical section of the mounting direction of the fan assembly, the fan assembly comprises a cooling fan and a fan mounting plate fixedly mounted on the cooling fan, and the fan mounting plate is fixedly mounted in the mounting holes through fixing pieces.

Furthermore, the back plate is of a U-shaped structure, the opening side of the installation shell is fixedly connected with the bottom plate at the opening side of the back plate, a plurality of air outlet holes are formed in the side surface of the installation shell corresponding to the position array of the fan assembly, and air outlets are formed in the side surface of the back plate corresponding to the positions of the air outlet holes.

Furthermore, the whole air deflector is approximately of a T-shaped structure, and the air deflector seals the top surface of the heat dissipation air duct to separate and split the two fan assemblies.

Further, the front of the installation shell is provided with a driving plate, the upper part of the driving plate is prevented from being exposed out of the installation hole, 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.

Further, the installation shell is provided with a first avoidance hole corresponding to the position of the power module, the back of the driving plate is provided with a plurality of bus capacitors, and the installation shell is provided with a second avoidance hole corresponding to the position of the bus capacitors.

Further, the backboard is a backboard of the control cabinet.

Compared with the prior art, the utility model has the following beneficial effects:

The frequency converter has the characteristics of simple and reliable structure and convenient maintenance, remarkably prolongs the service life, reduces the failure rate, ensures that the equipment is more efficient due to compact layout and high space utilization rate, realizes air outlet at the left side and the right side of the fan, seals the top surface of the air duct, is difficult to cause sundries to fall into the running area of the fan, greatly reduces the failure rate of the fan and prolongs the service life of the fan. In addition, the bottom back air inlet design effectively reduces the temperature rise of the power module, further prolongs the service life of the power module, and the front-mounted driving plate greatly facilitates connection and maintenance work.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of the structure of the mounting housing of the present utility model;

FIG. 2 is a schematic view of a fan assembly according to the present utility model;

FIG. 3 is a schematic view of a fan assembly of the present utility model;

FIG. 4 is a schematic view of the structure of the driving plate of the present utility model;

FIG. 5 is a schematic view of a drive plate installation of the present utility model;

FIG. 6 is a schematic diagram of a heat sink assembly according to the present utility model;

FIG. 7 is a schematic view of the structure of the back plate of the present utility model;

fig. 8 is a schematic view of the overall installation structure of the present utility model.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1-8, an elevator frequency converter structure comprises a frequency converter body, wherein the frequency converter body comprises a mounting shell 1 with a U-shaped structure and a back plate 11 connected with the mounting shell 1, a mounting space is formed between the mounting shell 1 and the back plate 11, the upper side and the lower side of the mounting space are sealed by air deflectors 9 and air inlet plates 10, a radiator 8 is fixedly installed in the mounting space, a fan assembly 4 is symmetrically and detachably arranged on the two sides of the top of the mounting shell 1, an air inlet 13 is formed in the back plate 11, the air inlet 13 is positioned between the lower end surface of the radiator 8 and the air inlet plate 10, a heat dissipation air channel is formed among the mounting shell 1, the back plate 11, the air inlet plates 10 and the air deflectors 9, cold air flows in from the air inlet 13 of the back plate 11, takes heat away through the radiator to form hot air, and the hot air is discharged from the left side and the right side of the fan assembly 4.

The elevator frequency converter mainly comprises a frequency converter body, wherein the frequency converter body comprises a U-shaped installation shell 1 and a backboard 11 connected with the installation shell. The two parts together form a closed or semi-closed installation space for accommodating and protecting the main electronic components of the frequency converter. The upper and lower sides of the installation space are respectively sealed by the air deflector 9 and the air inlet plate 10, so that the purpose of the sealing treatment 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 a core component of the heat dissipation system and is responsible for transferring heat generated during operation of the frequency converter to the air flowing through. On both sides of the top of the installation housing 1, detachable fan assemblies 4 are symmetrically provided. The fan assemblies 4 rotate after being electrified to generate suction force or thrust force to help accelerate the flow of air flow, thereby improving the heat dissipation efficiency. The back plate 11 is provided with an air inlet 13, and the air inlet 13 is positioned between the lower end surface of the radiator 8 and the air inlet plate 10. When the elevator frequency converter works, external cold air is sucked into the installation space through the air inlet 13. These cold air, when flowing through the radiator 8, absorbs heat from the radiator 8, and becomes hot air.

The installation shell 1, the backboard 11, the air inlet plate 10 and the air guide plate 9 together form a heat dissipation air channel. This duct ensures that cold air flows in a predetermined path, i.e., from the air inlet 13 of the back plate 11, exchanges heat through the radiator 8, then turns into hot air, and finally is discharged to the left and right sides by the fan assembly 4 mounted on the top of the housing 1.

Specifically, as shown in fig. 1, 2 and 3, the mounting holes 2 for mounting the fan assembly 4 are formed on the left and right sides of the front surface of the mounting housing 1, the size of the mounting holes 2 is matched with the vertical section of the mounting direction of the fan assembly 4, the fan assembly 4 comprises a cooling fan 41 and a fan mounting plate 42 for fixedly mounting the cooling fan 41, and the fan mounting plate 42 is fixedly mounted in the mounting holes 2 through a fixing piece.

On both the right and left sides of the front surface of the installation housing 1, installation holes 2 for installing a fan assembly 4 are designed. The dimensions of the mounting hole 2 ensure that it matches 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 stably installed in the installation hole 2, but also optimizes the passage of the air flow, so that the heat dissipation effect is more efficient. The fan assembly 4 is mainly composed of two parts, namely a radiator fan 41 and a fan mounting plate 42. The heat radiation fan 41 is a key component of the heat radiation system, and is responsible for generating an air flow and accelerating heat transfer and dissipation. And the fan mounting plate 42 serves to support and fix the heat dissipation fan 41. During installation, the fan mounting plate 42 is fixedly secured within the mounting hole 2 by fasteners (e.g., screws, snaps, etc.). The installation mode is simple and easy to operate, and has good stability and reliability. Since the mounting hole 2 is matched with the vertical section of the fan assembly 4, the heat radiation fan 41 can ensure smooth flow of air flow after mounting, and the heat radiation efficiency is prevented from being lowered due to improper mounting. In addition, the removable fan assembly 4 facilitates later maintenance. When the cooling fan 41 needs cleaning, maintenance or replacement, the fan assembly 4 can be taken out of the mounting hole 2 by simply disassembling the fixing piece, so that maintenance time and cost are greatly saved.

Specifically, as shown in fig. 7 and 8, the back plate 11 is also in a U-shaped structure, the opening side of the installation housing 1 is fixedly connected with the bottom plate of the opening side of the back plate 11, a plurality of air outlets 3 are arranged on the side surface of the installation housing 1 corresponding to the position array of the fan assembly 4, and air outlets 12 are arranged on the side surface of the back plate 11 corresponding to the positions of the air outlets 3.

When the elevator frequency converter is in operation, a large amount of heat is generated inside the elevator frequency converter. In order to maintain the normal operating temperature of the device, it is necessary to dissipate this heat in a timely manner. At this time, the radiator 8 absorbs the heat and transfers it to the air flowing therethrough. The fan assembly 4 generates air flow through rotation, and discharges the heated hot air from the air outlet 3 and the air outlet 12 to the external environment. Cold air enters the installation space through an air inlet 13 on the backboard 11, and is changed into hot air after heat exchange through the radiator 8. The hot air is discharged to the external environment through the air outlet hole 3 and the air outlet 12 by the fan assembly 4. In this process, the air flow path is continuous and smooth, ensuring maximization of the heat dissipation efficiency.

Specifically, as shown in fig. 6, the air deflector 9 has a T-shaped structure, and the air deflector 9 seals the top surface of the heat dissipation air duct to separate and split the two fan assemblies 4. The T-shaped design of the deflector 9 enables it to isolate the space between the two fan assemblies 4. This means that each fan assembly 4 is responsible for exhausting the hot air from its respective area, avoiding mixing and interference of the hot air in the tunnel. The structure of the isolation shunt helps to optimize the heat dissipation effect, ensuring that each fan assembly 4 works efficiently. The shape and position of the deflector 9 also act to direct the air flow. Under the action of the fan assembly 4, the hot air is accelerated and discharged from the air outlet holes 3 and the air outlet 12. The air deflector 9 ensures that the hot air can smoothly flow to the air outlet 3 without being disturbed by the air flow in other areas.

It should be noted that the air inlet plate 10 may be a separate part and be fixed to the installation housing 1 or may be integral with the installation housing 1, and the air deflector 9 may be a separate part and be fixed to the installation housing 1 or may be integral with the installation housing 1.

Specifically, as shown in fig. 5, the front surface of the installation housing 1 is provided with a driving plate 7, the upper portion of the driving plate 7 is avoided from the installation hole 2, so that the fan assembly 4 is exposed, the back of the driving plate 7 is connected with the front surface of the power module 6, and the back of the power module 6 is in heat transfer connection with the front surface of the radiator 8. When the power module 6 is operated, a large amount of heat is generated. The heat is transferred to the heat sink 8 through a heat transfer connection at the back of the power module 6. The fan assembly 4 is exposed on the front surface of the frequency converter, so that the frequency converter can be normally disassembled and assembled without being influenced, and the frequency converter is more convenient.

Specifically, as shown in fig. 1 and 4, a first avoidance hole 5 is formed in the mounting housing 1 corresponding to the position of the power module 6, a plurality of bus capacitors are formed in the back of the driving plate 7, and a second avoidance hole 14 is formed in the mounting housing 1 corresponding to the position of the bus capacitors. The first avoidance holes 5 and the second avoidance holes 14 are arranged, so that the whole structure is more compact.

Specifically, as shown in the figure, the back plate 11 is a back plate of a control cabinet. The frequency converter has no bottom plate design, and the control cabinet back plate forms a complete air channel, so that the shell material can be saved, and the cost can be reduced. In addition, the frequency converter structure is exemplified by a sheet metal structure, and a plastic structure may also be used.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The elevator frequency converter structure is characterized by comprising a frequency converter body, wherein the frequency converter body comprises a mounting shell body and a back plate, the mounting shell body is of a U-shaped structure, the back plate is connected with the mounting shell body, a mounting space is formed between the mounting shell body and the back plate, the upper side and the lower side of the mounting space are sealed through air deflectors and air inlet plates, 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 body, an air inlet is formed in the back plate and located at the position between the lower end face of the radiator and the air inlet plates, a heat dissipation air channel is formed among the mounting shell body, the back plate, the air inlet plate and the air deflectors, cold air flows in from the air inlet of the back plate, heat is taken away through the radiator to form hot air, and the hot air is discharged from the left side and the right side of the fan assemblies.

2. The elevator inverter structure of claim 1, wherein mounting holes for mounting the fan assembly are formed on the right and left sides of the front surface of the mounting housing, the size of the mounting holes is matched with the vertical section of the mounting direction of the fan assembly, the fan assembly comprises a cooling fan and a fan mounting plate for fixedly mounting the cooling fan, and the fan mounting plate is fixedly mounted in the mounting holes through a fixing piece.

3. The elevator frequency converter structure according to claim 2, wherein the back plate is also of a U-shaped structure, the open side of the installation housing is fixedly connected with the bottom plate of the open side of the back plate, a plurality of air outlets are arranged on the side surface of the installation housing corresponding to the fan assembly in position array, and air outlets are arranged on the side surface of the back plate corresponding to the positions of the air outlets.

4. The elevator frequency converter structure according to claim 3, wherein the air deflector is approximately of a T-shaped structure, and seals the top surface of the heat dissipation air duct to separate and split the two fan assemblies.

5. The elevator inverter structure of claim 4, wherein a driving plate is mounted on the front surface of the mounting housing, the upper portion of the driving plate is prevented from being exposed out of the mounting hole, the back of the driving plate is connected with the front surface of the power module, and the back of the power module is in heat transfer fit with the front surface of the radiator.

6. The elevator frequency converter structure according to claim 5, wherein the mounting housing is provided with a first avoidance hole corresponding to the position of the power module, the back of the driving plate is provided with a plurality of bus capacitors, and the mounting housing is provided with a second avoidance hole corresponding to the position of the bus capacitors.

7. The elevator inverter architecture of claim 6, wherein the back plate is a back plate of a control cabinet.