A frequency conversion cabinet

Abstract

The utility model discloses a frequency conversion cabinet, this frequency conversion cabinet includes the frequency converter unit, DCDC reactor, control unit and the first heat exchanger of the installation at the top outside of cabinet of being arranged in the cabinet, the frequency converter unit includes main frequency converter unit and a plurality of auxiliary frequency converter unit, main frequency converter unit, at least one auxiliary frequency converter unit and the respective one end of DCDC reactor is equipped with fan and second heat exchanger respectively, and each second heat exchanger is connected with first heat exchanger through water pipe respectively. This frequency conversion cabinet adopts modularization design and compact structure layout, has effectively reduced the size of frequency conversion cabinet, has promoted power density, through the mutual cooperation between heat exchanger, heat dissipation circulation is smooth, has improved the heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a frequency converter cabinet. Background Technology

[0002] With the rapid development of industrial automation, new energy, and high-end transmission, large-scale power electronic equipment is increasingly widely used in rail transit, energy management, heavy industry, and other scenarios. As a core power conversion device, frequency converters have increasingly higher performance requirements for their power cabinets. On the one hand, they need to adapt to the development trend of higher power levels and power density; on the other hand, they also need to achieve goals such as compact structure, convenient maintenance, efficient heat dissipation, and functional integration within a limited space.

[0003] Currently, common inverter cabinet structures still have many limitations in their overall layout. Firstly, the internal component arrangement is often inefficient, resulting in low cabinet space utilization and difficulty in further reducing the overall size, thus hindering the improvement of system power density. Secondly, heat dissipation designs often rely on traditional single air ducts or localized forced air cooling, leading to uneven airflow and limited heat exchange efficiency. Especially in high-temperature, high-humidity, or dusty outdoor environments, insufficient heat dissipation can easily cause component overheating, affecting system stability and lifespan. Furthermore, existing power cabinets often have non-modular internal components, making assembly cumbersome and on-site maintenance and component replacement difficult. This not only increases manufacturing costs but also reduces the product iteration and system integration efficiency for system manufacturers. Therefore, there is an urgent need for a new inverter cabinet layout scheme with a more rational structural design, scientific heat dissipation path, and high degree of modular assembly to systematically solve the problems currently faced by inverter equipment in terms of power density improvement, heat dissipation optimization, assembly efficiency, and functional expansion. Utility Model Content

[0004] The purpose of this utility model is to avoid the shortcomings of the prior art and provide a frequency converter cabinet that is small in size, has good heat dissipation, high integration and is easy to assemble and maintain, in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a frequency converter cabinet, including a frequency converter unit, a DC-DC reactor, a control unit, and a first heat exchanger installed on the outside of the top of the cabinet, all installed inside the cabinet. The frequency converter unit includes a main frequency converter unit and several auxiliary frequency converter units. A fan and a second heat exchanger are respectively provided at one end of the main frequency converter unit, at least one auxiliary frequency converter unit, and the DC-DC reactor. Each of the second heat exchangers is connected to the first heat exchanger through a water pipe.

[0007] Furthermore, a fan and a second heat exchanger are provided at the lower end of the main inverter unit and at the lower end of at least one auxiliary inverter unit.

[0008] Furthermore, each of the auxiliary frequency converter units is arranged adjacent to one side of the cabinet, the control unit is located on the other side of the cabinet, and the main frequency converter unit is located between the auxiliary frequency converters and the control unit.

[0009] Furthermore, the frequency converter cabinet also includes a DC-DC module arranged adjacent to the main frequency converter unit, and the lower end of the DC-DC module is provided with a fan and a second heat exchanger.

[0010] Furthermore, the DC-DC reactor is located below an auxiliary frequency converter unit, and a fan and a second heat exchanger are provided at the upper end of the DC-DC reactor.

[0011] Furthermore, it also includes input ports and output ports located at the bottom of the cabinet.

[0012] Furthermore, each of the second heat exchangers is connected to the water pipe via a quick-connect hose.

[0013] Furthermore, the first heat exchanger is inclinedly disposed on the outer side of the top of the cabinet, and the angle between the bottom surface of the first heat exchanger and the top plane of the cabinet is greater than 20 degrees.

[0014] Furthermore, both the first heat exchanger and the second heat exchanger are air-water heat exchangers, and the first heat exchanger includes an inlet and an outlet.

[0015] The advantages of this utility model compared with the prior art are:

[0016] A frequency converter cabinet includes a frequency converter unit, a DC-DC reactor, a control unit, and a first heat exchanger installed on the top outside of the cabinet, all installed inside the cabinet. The frequency converter unit includes a main frequency converter unit and several auxiliary frequency converter units. One end of the main frequency converter unit, at least one auxiliary frequency converter unit, and the DC-DC reactor is respectively provided with a fan and a second heat exchanger. Each second heat exchanger is connected to the first heat exchanger via a water pipe.

[0017] In terms of structural compactness and power density, the high integration and rational arrangement of core components such as DC-DC reactors, frequency converter units, and DC-DC modules significantly reduces internal redundant space, thereby optimizing the overall size of the unit. This compact layout not only reduces the equipment's footprint but also directly improves the overall power density.

[0018] In terms of assembly and maintenance efficiency, all internal components of the power cabinet adopt a modular design. This design greatly reduces the assembly difficulty and time on the production line, thereby improving production efficiency. At the same time, during on-site maintenance, faulty modules can be quickly located and replaced individually without the need for large-scale disassembly of the entire unit, effectively shortening maintenance time and reducing maintenance costs.

[0019] In terms of heat dissipation performance and system reliability, a fan and heat exchanger are installed at one end of the main heat-generating unit, so that the cooling airflow can flow through all the main heat-generating units in an orderly manner and cooperate efficiently with the first heat exchanger installed at the top at an angle to form a smooth heat dissipation cycle, which improves heat dissipation efficiency and ensures the stable operation of the power cabinet under high temperature and high load conditions.

[0020] In terms of functional integration and system scalability, this layout offers high flexibility and adaptability. Space is reserved within the cabinet for integrating functional components such as chopper modules and chopper resistors, enhancing the overall functionality of a single cabinet.

[0021] In terms of economic cost, the optimized layout shortens the flow path of the internal power busbars, reduces the amount of expensive conductors used, and lowers the cost of the frequency converter cabinet.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A layout diagram of a frequency converter cabinet provided for a specific embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the air duct of a frequency converter cabinet is provided for a specific embodiment of this utility model;

[0026] Figure 3 This is an installation diagram of an air-water heat exchanger provided for a specific embodiment of the present utility model.

[0027] Figure Labels

[0028] 101. Cabinet; 102. Main inverter unit; 103. DC-DC reactor; 104. Fan; 105. Second heat exchanger; 106. DC-DC module; 107. First heat exchanger; 108. Water pipe; 109. Auxiliary inverter unit; 110. Input port; 111. Output port; 112. Control unit; 121. Water inlet; 122. Water outlet. Detailed Implementation

[0029] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] like Figure 1 - Figure 3 As shown, this utility model discloses a frequency converter cabinet, characterized in that it includes a frequency converter unit, a DC-DC reactor 103, a control unit 112, and a first heat exchanger 107 installed on the outer side of the top of the cabinet 101, all installed in a cabinet 101; the frequency converter unit includes a main frequency converter unit 102 and a plurality of auxiliary frequency converter units 109; each of the main frequency converter unit 102, at least one auxiliary frequency converter unit 109, and the DC-DC reactor 103 is provided with a fan 104 and a second heat exchanger 105 at one end; each of the second heat exchangers 105 is connected to the first heat exchanger 107 through a water pipe 108.

[0036] This frequency converter cabinet adopts a modular design and a compact structure, which effectively reduces the size of the frequency converter cabinet and increases the power density; through the cooperation between the heat exchangers, the heat dissipation circulation is smooth and the heat dissipation efficiency is improved.

[0037] It should be noted that the number of auxiliary frequency converters is one or more.

[0038] In one embodiment, such as Figure 1 As shown, the lower ends of the main inverter unit 102 and at least one auxiliary inverter unit 109 are respectively provided with a fan 104 and a second heat exchanger 105 from top to bottom.

[0039] Specifically, a fan 104 and a second heat exchanger 105 for heat dissipation are respectively installed at the lower ends of the auxiliary inverter unit 109 and the main inverter unit 102, so that the inverter cabinet forms a good air-cooling heat dissipation cycle. Taking the main inverter unit 102 as an example, when working, the fan 104 draws in air from the lower end of the main inverter unit 102, that is, the bottom area of ​​the cabinet 101, and blows it towards the main inverter unit 102. The fan 104 blows air upward and flows through the main inverter unit 102. Then the air blown out reaches the top of the cabinet 101 and then blows from both sides of the main inverter unit 102 towards the bottom of the cabinet 101, forming a heat dissipation cycle. The heat dissipation cycle of the auxiliary inverter unit 109 is the same, and will not be described in detail. By installing fans 104 and heat exchangers at the lower ends of the auxiliary inverter unit 109 and the main inverter unit 102 respectively, each module and unit has its own corresponding circulating heat dissipation path and does not interfere with each other, preventing the entire inverter cabinet from shutting down due to the failure of air cooling due to the failure of a certain fan 104 or heat exchanger.

[0040] In one embodiment, the frequency converter cabinet also includes a DC-DC module 106 arranged adjacent to the main frequency converter unit 102. The lower end of the DC-DC module 106 is provided with a fan 104 and a second heat exchanger 105 from top to bottom. Each auxiliary frequency converter unit 109 is arranged adjacent to one side of the cabinet 101, and the control unit 112 is arranged on the other side of the cabinet 101. The main frequency converter unit 102 is arranged between the auxiliary frequency converters and the control unit 112.

[0041] Specifically, when the frequency converter cabinet requires voltage conversion, a DC-DC module 106 is provided. A fan 104 and a second heat exchanger 105 are provided from top to bottom at the lower end of the DC-DC module 106 to circulate heat dissipation. Two auxiliary frequency converter units 109 are arranged adjacent to each other at one end of the horizontal direction of the cabinet 101. The main frequency converter unit 102 and the DC-DC module 106 are arranged adjacent to each other between the auxiliary frequency converter units 109 and the controller unit.

[0042] It should be noted that the positions of the DC-DC module 106 and the main frequency converter unit 102 can be interchanged. When the DC-DC module 106 is not needed, an auxiliary frequency converter is added.

[0043] In one embodiment, a DC-DC reactor 103 is located below an auxiliary inverter unit 109. A fan 104 and a second heat exchanger 105 are arranged from top to bottom on the upper end of the DC-DC reactor 103. Specifically, when operating, the fan 104 draws air from its bottom, near the DC-DC reactor 103, and blows air upwards. When the airflow reaches the top of the cabinet 101, it flows downwards to the vicinity of the DC-DC reactor 103, forming a circulation. In this embodiment, the auxiliary inverter above the DC-DC reactor 103 does not have a heat dissipation device, i.e., no heat exchanger or fan 104 is provided. The heat dissipation path of the fan 104 and heat exchanger located on the upper end of the DC-DC reactor 103 can also dissipate heat from the auxiliary inverter.

[0044] It should be noted that the positions of fan 104 and heat exchanger can be interchanged.

[0045] In one embodiment, the frequency converter cabinet also includes an input port 110 and an output port 111 located at the bottom of the cabinet 101. The input port 110 receives AC power from the main power grid to provide a power signal to the internal frequency converter; the output port 111 delivers the processed, adjustable-voltage and adjustable-frequency AC power from inside the frequency converter to the motor, precisely controlling the motor by changing the output voltage and frequency. Specifically, the positions of the input port 110 and the output port 111 can be interchanged.

[0046] In one embodiment, each of the second heat exchangers 105 is connected to the water pipe 108 via a quick-connect hose (not shown in the figure), and the first heat exchanger 107 is connected to the second heat exchanger 105 via the water pipe 108. The quick-connect hose is a hose that integrates a quick connector, which is quick to install and easy to disassemble, and has excellent sealing performance, effectively ensuring the reliability of the connection between the second heat exchanger 105 and the water pipe 108.

[0047] It should be noted that both the first heat exchanger 107 and the second heat exchanger 105 are air-water heat exchangers.

[0048] The fluid passing through each of the second heat exchangers 105 enters the first heat exchanger 107 through the inlet 121. Under the action of the water pump (not shown in the figure), it returns to the water pipe 108 through the outlet 122 and flows into the frequency converter cabinet for circulation. The fan 104 provides air cooling for the modules and units inside the cabinet 101. The second heat exchanger 105 absorbs heat from the air around the fan 104 and the cabinet 101, and transfers the heat through the water pipe 108 to the first heat exchanger 107 on the top outside of the cabinet 101. The first heat exchanger 107 then transfers the heat to the air outside the cabinet 101.

[0049] like Figure 3As shown, the first heat exchanger 107 is inclinedly disposed on the outer side of the top of the cabinet 101, and the angle between the bottom surface of the first heat exchanger 107 and the top plane of the cabinet 101 is greater than 20 degrees. The inclined placement of the first heat exchanger 107 helps to increase the contact area between the heat exchanger and the air, and promotes heat exchange between the first heat exchanger 107 and the air.

[0050] This utility model discloses a frequency converter cabinet, which includes a frequency converter unit, a DC-DC reactor 103, a control unit 112, and a first heat exchanger 107 installed on the top outside of the cabinet 101, all installed in a cabinet 101. The frequency converter unit includes a main frequency converter unit 102 and several auxiliary frequency converter units 109. Each of the main frequency converter unit 102, at least one auxiliary frequency converter unit 109, and the DC-DC reactor 103 is provided with a fan 104 and a second heat exchanger 105 at one end. Each second heat exchanger 105 is connected to the first heat exchanger 107 through a water pipe 108.

[0051] In terms of structural compactness and power density, the high integration and rational arrangement of core components such as the DC-DC reactor 103, frequency converter unit, and DC-DC module 106 significantly reduces internal redundant space, thereby optimizing the overall size of the unit. This compact layout not only reduces the equipment's footprint but also directly improves the overall power density.

[0052] In terms of assembly and maintenance efficiency, all internal components of the power cabinet adopt a modular design. This design greatly reduces the assembly difficulty and time on the production line, thereby improving production efficiency. At the same time, during on-site maintenance, faulty modules can be quickly located and replaced individually without the need for large-scale disassembly of the entire unit, effectively shortening maintenance time and reducing maintenance costs.

[0053] In terms of heat dissipation performance and system reliability, a fan 104 and a heat exchanger are installed at one end of the main heat-generating unit, so that the cooling airflow can flow through all the main heat-generating units in an orderly manner and cooperate efficiently with the first heat exchanger 107 installed at the top at an angle to form a smooth heat dissipation cycle, which improves heat dissipation efficiency and ensures the stable operation of the power cabinet under high temperature and high load conditions.

[0054] In terms of functional integration and system scalability, this layout offers high flexibility and adaptability. Space is reserved within the cabinet for integrating functional components such as chopper modules and chopper resistors, enhancing the overall functionality of a single cabinet.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A frequency converter cabinet, characterized in that, This includes the inverter unit, DC-DC reactor, control unit, and the first heat exchanger installed on the outside of the top of the cabinet, all housed within the cabinet. The inverter unit includes a main inverter unit and several auxiliary inverter units; A fan and a second heat exchanger are respectively provided at one end of the main frequency converter unit, at least one auxiliary frequency converter unit, and the DC-DC reactor; Each of the second heat exchangers is connected to the first heat exchanger via a water pipe.

2. The frequency converter cabinet according to claim 1, characterized in that, A fan and a second heat exchanger are provided at the lower end of the main inverter unit and at the lower end of at least one auxiliary inverter unit.

3. The frequency converter cabinet according to claim 1, characterized in that, Each of the auxiliary frequency converter units is arranged adjacent to one side of the cabinet, the control unit is located on the other side of the cabinet, and the main frequency converter unit is located between the auxiliary frequency converters and the control unit.

4. A frequency converter cabinet according to claim 3, characterized in that, It also includes a DC-DC module arranged adjacent to the main inverter unit, and the lower end of the DC-DC module is provided with a fan and a second heat exchanger.

5. A frequency converter cabinet according to claim 1, characterized in that, The DC-DC reactor is located below an auxiliary frequency converter unit, and a fan and a second heat exchanger are provided at the upper end of the DC-DC reactor.

6. A frequency converter cabinet according to claim 1, characterized in that, It also includes input ports and output ports located at the bottom of the cabinet.

7. A frequency converter cabinet according to claim 1, characterized in that, Each of the second heat exchangers is connected to the water pipe via a quick-connect hose.

8. A frequency converter cabinet according to claim 1, characterized in that, The first heat exchanger is inclinedly disposed on the outer side of the top of the cabinet, and the angle between the bottom surface of the first heat exchanger and the top plane of the cabinet is greater than 20 degrees.

9. A frequency converter cabinet according to claim 1, characterized in that, Both the first heat exchanger and the second heat exchanger are air-water heat exchangers, and the first heat exchanger includes an inlet and an outlet.

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