A frequency converter

Abstract

The application provides a frequency converter, which comprises a frequency conversion assembly, a heat conduction member and a fan, wherein the heat conduction member is provided with a first through hole and a second through hole, the opening of one end of the first through hole is opposite to the frequency conversion assembly, the axis of the second through hole is perpendicular to the axis of the first through hole, the first through hole and the second through hole are communicated, the air blown by the fan passes through the second through hole to the outside, so that a negative pressure is formed in the first through hole, and the gas around the frequency conversion assembly flows into the first through hole. The frequency converter provided in the application can avoid the direct contact between the frequency converter and the air blown by the fan, and reduce the possibility of dust adhesion by separating the frequency conversion assembly and the fan into different spaces, connecting the frequency conversion assembly and the heat conduction member, and removing the air around the frequency conversion assembly into the heat conduction member and discharging the air outside the heat conduction member by the fan.

Description

Technical Field

[0001] This application relates to the field of frequency converter technology, and more particularly to a frequency converter. Background Technology

[0002] Variable frequency drives (VFDs), as electrical devices used to control the speed of electric motors, are widely used in industrial automation. During operation, VFDs generate heat due to the conversion and transfer of electrical energy. Therefore, heat dissipation is crucial for maintaining the normal operation of the VFD. Traditional heat dissipation solutions typically use heat sinks, fans, and other methods to improve the heat dissipation effect of the VFD.

[0003] Traditional frequency inverters have several heat dissipation problems. For example, fan cooling achieves heat dissipation by blowing outside air into the inverter. However, the air in the inverter's operating environment often contains a large amount of dust. The heat generated by the fan easily attracts dust to the fan, and the dust enters the inverter with the airflow. The electronic components inside the inverter are at high temperatures, and the dust blown into the inverter easily adheres to these components, hindering electrical connections between them. In severe cases, this can cause the inverter to overheat and burn out.

[0004] Therefore, it is necessary to propose a frequency converter that can efficiently dissipate heat without affecting the frequency conversion function to solve the problem that the fan of traditional frequency converters easily brings dust into the frequency converter. Summary of the Invention

[0005] In view of this, it is necessary to provide a frequency converter to solve the above problems.

[0006] Embodiments of this application provide a frequency converter, comprising:

[0007] Variable frequency drive components;

[0008] The heat-conducting component has a first through hole and a second through hole. The opening at one end of the first through hole is directly opposite the frequency converter. The axis of the second through hole is perpendicular to the axis of the first through hole, and the first through hole and the second through hole are connected.

[0009] A fan, wherein the air outlet of the fan is connected to the second through hole;

[0010] The air blown out by the fan passes through the second through hole to the outside, so as to create a negative pressure in the first through hole, causing the gas around the frequency converter to flow into the first through hole.

[0011] In at least one embodiment of this application, a heat sink is further included. The heat sink is disposed on the side of the heat-conducting component away from the frequency converter. The heat sink has heat dissipation holes, and the axis of the heat dissipation holes is parallel to the axis of the second through hole.

[0012] In at least one embodiment of this application, both the heat-conducting element and the heat sink are made of aluminum alloy.

[0013] In at least one embodiment of this application, silicone grease is applied between the heat sink and the thermal conductive element.

[0014] In at least one embodiment of this application, a protective housing is further included, wherein a receiving cavity is provided inside the protective housing, and the heat sink, heat conductor and fan are all disposed in the receiving cavity.

[0015] In at least one embodiment of this application, the protective housing is provided with ventilation openings.

[0016] In at least one embodiment of this application, the protective housing is snap-fitted to the frequency converter assembly.

[0017] In at least one embodiment of this application, a control panel is further included, which is electrically connected to the frequency converter component.

[0018] In at least one embodiment of this application, the protective housing is provided with a bottom support rod, which is fixedly connected to the heat sink.

[0019] In at least one embodiment of this application, the protective housing is provided with a bottom support rod, which is fixedly connected to the heat sink.

[0020] The inverter described above separates the inverter component and the fan into different spaces and connects them through a heat-conducting component. This draws the air around the inverter component into the heat-conducting component and then exhausts it to the outside with the fan. This method avoids the inverter coming into direct contact with the air blown in by the fan, reducing the possibility of dust accumulation and solving the problem that the fan of a traditional inverter easily brings dust into the inverter. Attached Figure Description

[0021] Figure 1 A 3D view of the frequency converter;

[0022] Figure 2 This is an exploded view of the frequency converter;

[0023] Figure 3 Exploded view of the protective casing;

[0024] Figure 4 AA is a cross-sectional view of the heat-conducting component.

[0025] Explanation of main component symbols

[0026] 100. Inverter; 1. Inverter assembly; 2. Heat-conducting component; 21. First through hole; 22. Second through hole; 3. Fan; 4. Heat sink; 41. Heat dissipation hole; 5. Protective housing; 51. Accommodation cavity; 52. Ventilation opening; 53. Bottom support rod; 54. Dustproof net; 6. Control panel. Detailed Implementation

[0027] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0028] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0029] Embodiments of this application provide a frequency converter, comprising:

[0030] Variable frequency drive components;

[0031] The heat-conducting component has a first through hole and a second through hole. The opening at one end of the first through hole is directly opposite the frequency converter. The axis of the second through hole is perpendicular to the axis of the first through hole, and the first through hole and the second through hole are connected.

[0032] A fan, wherein the air outlet of the fan is connected to the second through hole;

[0033] The air blown out by the fan passes through the second through hole to the outside, so as to create a negative pressure in the first through hole, causing the gas around the frequency converter to flow into the first through hole.

[0034] The inverter described above separates the inverter component and the fan into different spaces and connects them through a heat-conducting component. This draws the air around the inverter component into the heat-conducting component and then exhausts it to the outside with the fan. This method avoids the inverter coming into direct contact with the air blown in by the fan, reducing the possibility of dust accumulation and solving the problem that the fan of a traditional inverter easily brings dust into the inverter.

[0035] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] Please see Figures 1-4An embodiment of this application provides a frequency converter 100, including a frequency conversion component 1, a heat conduction component 2, and a fan 3. The heat conduction component 2 has a first through hole 21 and a second through hole 22. The opening at one end of the first through hole 21 is directly opposite to the frequency conversion component 1. The axis of the second through hole 22 is perpendicular to the axis of the first through hole 21, and the first through hole 21 and the second through hole 22 are connected. The air outlet of the fan 3 is connected to the second through hole 22. The air blown out by the fan 3 passes through the second through hole 22 to the outside, so that a negative pressure is formed in the first through hole 21, causing the gas around the frequency conversion component 1 to flow into the first through hole 21.

[0037] Specifically, the frequency converter 1 is the core of the frequency converter 100, responsible for controlling the speed of the motor. The frequency converter 1 generates heat during operation. The heat-conducting component 2 includes a first through-hole 21 and a second through-hole 22. One end of the first through-hole 21 faces the frequency converter 1, while the axis of the second through-hole 22 is perpendicular to the axis of the first through-hole 21, and the two are connected. The function of the heat-conducting component 2 is to guide the hot gas around the frequency converter 1 into the first through-hole 21. The air outlet of the fan 3 is connected to the second through-hole 22. The blown air creates a negative pressure inside the first through-hole 21, causing the hot gas around the frequency converter 1 to flow into the first through-hole 21.

[0038] Furthermore, when the inverter component 1 generates heat during operation, the design of the heat-conducting component 2 allows hot gas to enter the heat-conducting component 2 through the first through-hole 21. The air blown out by the fan 3 through the second through-hole 22 creates a negative pressure, drawing the hot gas from around the heat-conducting component 2 to the second through-hole 22 and then expelling it to the outside. This effectively achieves the extraction and exhaust of hot gas. The beneficial effect is that by introducing the structure of the fan 3 and the heat-conducting component 2, the heat dissipation system of the inverter 100 is optimized. This design effectively separates the heat dissipation area and the functional area, preventing dust or contaminants from spreading to the functional area and improving the reliability and stability of the inverter 100.

[0039] In one specific example, a heat sink 4 is also included. The heat sink 4 is located on the side of the heat conductor 2 away from the frequency converter 1. The heat sink 4 has heat dissipation holes 41, and the axis of the heat dissipation holes 41 is parallel to the axis of the second through hole 22.

[0040] Specifically, this feature indicates that a heat sink 4 is added to the inverter 100. The heat sink 4 is located on the side of the heat-conducting component 2 away from the inverter assembly 1, and the heat sink 4 has heat dissipation holes 41. The axis of the heat dissipation holes 41 is parallel to the axis of the second through hole 22. The heat sink 4 is located between the fan 3 and the heat-conducting component 2. When the fan 3 starts working, the air will blow through the heat dissipation holes 41 on the heat sink 4 and then be discharged to the outside. This can effectively conduct the heat generated by the inverter assembly 1 to the outside. The ventilation channel provided by the heat dissipation holes 41 on the heat sink 4 also allows hot air to be smoothly discharged through the heat sink 4. This helps to improve the efficiency of the entire heat dissipation system. The parallelism between the axis of the heat dissipation holes 41 and the axis of the second through hole 22 is conducive to constructing a ventilation path, ensuring that hot air is quickly blown out by the fan 3, and improving the heat dissipation effect.

[0041] Furthermore, when the frequency converter 1 generates heat during operation, the heat conductor 2 guides the hot gas to the first through hole 21, and the air blown out by the fan 3 passes through the second through hole 22, forming a negative pressure, which draws the hot gas from around the heat conductor 2 to the second through hole 22 and then exhausts it to the outside. The heat dissipation holes 41 of the heat sink 4 provide additional ventilation channels, so that when the hot gas blows through the heat dissipation holes 41, it can carry away the heat of the heat sink 4, thereby enhancing the effect of the entire heat dissipation system.

[0042] In one specific example, both the heat-conducting component 2 and the heat sink 4 are made of aluminum alloy.

[0043] Specifically, aluminum alloy has excellent thermal conductivity, which can effectively and quickly transfer the heat generated by the frequency converter 1 to the heat conductor 2 and the heat sink 4, improving the efficiency of the entire heat dissipation system. The lightweight and high-strength properties of aluminum alloy ensure that the use of the heat conductor 2 and the heat sink 4 does not add excessive weight to the entire frequency converter 100, contributing to the lightweight design of the system. Aluminum alloy also has good corrosion resistance, maintaining stable performance in humid or corrosive environments and extending the service life of the frequency converter 100. The application of silicone grease enhances heat dissipation: applying silicone grease between the heat conductor 2 and the heat sink 4 helps fill tiny gaps, improving thermal conductivity and ensuring that heat can be transferred more effectively from the frequency converter 1 to the heat sink 4.

[0044] In one specific example, silicone grease is applied between the heat sink 4 and the heat-conducting component 2.

[0045] Specifically, silicone grease has excellent lubricity and plasticity, which can fill the tiny gaps between the heat-conducting component 2 and the heat sink 4, ensuring a smoother contact surface and improving the efficiency of heat conduction. Silicone grease has high thermal conductivity, and when applied between the heat-conducting component 2 and the heat sink 4, it helps to enhance the heat conduction between them, allowing the heat generated by the frequency converter 1 to be transferred to the heat sink 4 more quickly. Aluminum alloy is prone to oxidation and corrosion in air, and the application of silicone grease can form a protective film to prevent oxygen from directly contacting the surfaces of the heat-conducting component 2 and the heat sink 4, delaying the oxidation reaction of the aluminum alloy and improving its corrosion resistance. Applying silicone grease also helps the heat-conducting component 2 and the heat sink 4 to adhere better, simplifying the manufacturing process and improving production efficiency.

[0046] In one specific example, it also includes a protective housing 5, which has a receiving cavity 51 inside, and the heat sink 4, the heat conductor 2 and the fan 3 are all located in the receiving cavity 51.

[0047] Specifically, the protective housing 5 effectively prevents external objects, dust, liquids, etc., from intruding into the inverter 100, reducing the risk of environmental impact on the inverter 100 and improving its stability and reliability. The accommodating cavity 51 provides an independent space for the heat sink 4, heat conductor 2, and fan 3, effectively isolating these components from direct contact with the external environment and preventing external factors from affecting the heat dissipation system. By placing the heat sink 4, heat conductor 2, and fan 3 within the accommodating cavity 51, the integrated layout of these key components is achieved, simplifying the structure, improving the overall compactness of the system, and contributing to lightweight design.

[0048] In one specific example, the protective housing 5 has a ventilation opening 52.

[0049] Specifically, the vent 52 promotes airflow within the inverter 100, improving the overall system ventilation. Through the vent 52, external air can freely flow into the protective housing 5, while hot air inside the housing 5 can smoothly escape, effectively accelerating heat dissipation. This helps maintain a suitable internal temperature for the inverter 100, improves heat dissipation efficiency, and prevents overheating of the inverter components 1, which could affect performance. The design of the vent 52 takes into account the housing's protection requirements. The vent 52 does not reduce the housing's protective performance; on the contrary, through its rational structural design, it maintains the integrity of the housing, preventing external dust, liquids, or foreign objects from directly entering the inverter 100, ensuring the safe operation of the internal components. The vent 52 also improves the inverter 100's adaptability to different environments. In high-temperature or humid environments, the vent 52 helps lower the internal temperature and prevent moisture accumulation, thereby slowing down component aging and extending the inverter 100's service life.

[0050] In one specific example, the protective housing 5 is snap-fitted to the frequency converter assembly 1.

[0051] Specifically, the snap-fit ​​connection is a robust connection method that ensures structural stability between the protective housing 5 and the frequency converter 1. This helps prevent loosening or displacement between the protective housing 5 and the frequency converter 1 due to vibration or external impact during operation, thereby maintaining the structural integrity of the entire frequency converter 100. The snap-fit ​​connection also makes the protective housing 5 relatively easy to install and remove. This is very convenient for manufacturing, maintenance, and component replacement, improving operational efficiency and reducing maintenance costs. The snap-fit ​​connection also makes the housing look neater and more aesthetically pleasing, eliminating protrusions from screws and other connectors, thus enhancing the overall product's appearance. The snap-fit ​​connection design takes into account environmental sealing requirements such as dustproofing and waterproofing. Through the tight snap-fit ​​design, dust, moisture, and other external substances can be effectively prevented from entering the interior of the protective housing 5, thereby protecting the normal operation of the frequency converter 1.

[0052] In one specific example, a control panel 6 is also included, which is electrically connected to the frequency converter component 1.

[0053] Specifically, the control panel 6 serves as the user interface for the frequency converter 100. Through its electrical connection with the frequency converter component 1, it enables intelligent control of the frequency converter 100. Users can set and adjust the operating parameters of the frequency converter 100 via the control panel 6 to meet the needs of different application scenarios, improving the flexibility and adjustability of the frequency converter 100. The control panel 6 integrates monitoring and display functions, displaying the operating status, parameters, and alarm information of the frequency converter 100 in real time. This allows operators to obtain timely operating information from the frequency converter 100, facilitating monitoring and maintenance. The electrical connection design of the control panel 6 ensures a tight integration with the frequency converter component 1, enabling operators' commands to be instantly transmitted to the component. Furthermore, the electrical connection means that the control panel 6 is detachable, allowing for easy upgrades or customization of its functions. This provides significant flexibility for meeting special needs or future technological upgrades.

[0054] In one specific example, the protective housing 5 is provided with a bottom support rod 53, which is fixedly connected to the heat sink 4.

[0055] Specifically, the main function of the bottom support rod 53 is to provide bottom support for the heat sink 4. By setting the bottom support rod 53 at the bottom of the accommodating cavity 51, the overall stability of the system can be increased, preventing external pressure or vibration from causing the heat sink 4 to tilt or become unstable. The fixed connection between the bottom support rod 53 and the heat sink 4 ensures that the heat sink 4 is effectively supported. This design allows the bottom support rod 53 to fix the position of the heat sink 4, preventing the heat sink 4 from moving due to external forces. This reduces potential damage during use and helps to mitigate adverse effects on internal components. The connection method of the bottom support rod 53 helps to optimize the position and stability of the heat sink 4, which is beneficial to maximizing the heat dissipation effect. Through a tight connection with the heat sink 4, the position of the heat sink 4 can be fixed, ensuring a stable connection between the heat conductor 2 and the heat sink 4. This effectively transfers heat from the frequency converter assembly 1 to the heat sink 4, improving heat dissipation efficiency and ensuring the stability of the frequency converter 100 during long-term high-load operation.

[0056] In one specific example, the protective housing 5 is provided with a dustproof net 54, which is positioned directly opposite the fan 3.

[0057] Specifically, the dust filter 54 is located on the protective housing 5, directly opposite the fan 3. Its main function is to block dust, impurities, and other particulate matter in the air, preventing them from entering the inverter 100 and thus protecting the internal components of the inverter 100, especially the inverter component 1 and the heat dissipation system. The dust filter 54 is positioned at the air inlet of the fan 3 to prevent dust accumulation on the heat dissipation holes 41, which would affect airflow and heat dissipation. Keeping the heat dissipation holes 41 clear helps improve the heat dissipation effect of the inverter 100, ensuring stable operation of the equipment over a long period. The dust filter 54 reduces the corrosion and damage of dust to the internal components of the inverter 100, effectively extending the equipment's service life and reducing maintenance and replacement costs. The dust filter 54 prevents dust from clogging the fan 3 or the heat dissipation holes 41, ensuring smooth operation of the fan 3 and guaranteeing airflow. This is crucial for maintaining the stability and performance of the inverter 100 during operation. The dust filter 54 design allows the inverter 100 to be used in various environments, especially in dusty industrial settings, providing reliable protection. Dustproof netting 54 is generally easy to disassemble and clean, which improves the convenience of equipment maintenance and reduces maintenance costs.

[0058] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A frequency converter, characterized in that, include: Variable frequency drive (VFD) components; The heat-conducting component has a first through hole and a second through hole. The opening at one end of the first through hole is directly opposite the frequency converter. The axis of the second through hole is perpendicular to the axis of the first through hole, and the first through hole and the second through hole are connected. A fan, wherein the air outlet of the fan is connected to the second through hole; The air blown out by the fan passes through the second through hole to the outside, so as to create a negative pressure in the first through hole, causing the gas around the frequency converter to flow into the first through hole; A heat sink is provided on the side of the heat-conducting component away from the frequency converter. The heat sink has heat dissipation holes, the axis of which is parallel to the axis of the second through hole. The heat sink is located between the fan and the heat-conducting component, and silicone grease is applied between the heat sink and the heat-conducting component. A protective housing with an internal cavity, wherein the heat sink, heat-conducting component, and fan are all disposed within the internal cavity; The protective shell has ventilation openings.

2. The frequency converter according to claim 1, characterized in that, Both the heat-conducting component and the heat sink are made of aluminum alloy.

3. The frequency converter according to claim 1, characterized in that, The protective housing is snap-fitted to the frequency converter component.

4. The frequency converter according to claim 1, characterized in that, It also includes a control panel, which is electrically connected to the frequency converter component.

5. The frequency converter according to claim 1, characterized in that, The protective shell is provided with a bottom support rod, which is fixedly connected to the heat sink.

6. The frequency converter according to claim 1, characterized in that, The protective housing is equipped with a dustproof mesh, which is positioned directly opposite the fan.

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