A high-efficiency passive harmonic filter with low temperature rise

Abstract

This invention provides a high-efficiency, low-temperature-rise passive harmonic filter, belonging to the field of filters. It includes a main base housing and a top housing with evenly spaced heat dissipation side slots on both sides, which work in conjunction with symmetrically fixed cooling fans on the inner side to form an effective airflow channel. The cooling fans draw external cool air into the top housing, accelerating airflow and allowing heat to be quickly dissipated to the external environment, significantly improving heat dissipation efficiency. The evenly fixed heat dissipation side plates on the outer side of the passive harmonic filter further increase the heat dissipation area, while the porous structure of the perforated support plate also facilitates airflow and enhances the heat dissipation effect. Through these heat dissipation designs, the temperature rise of the filter during operation is effectively reduced, ensuring that the internal electronic components operate in a suitable temperature environment, improving component performance and lifespan, reducing the failure rate caused by overheating, and improving the reliability and stability of the filter.

Description

Technical Field

[0001] This invention relates to the field of filter technology, and more specifically, to a high-efficiency passive harmonic filter with low temperature rise. Background Technology

[0002] In power systems, with the widespread application of nonlinear load devices such as frequency converters, rectifiers, and intermediate frequency furnaces, harmonic pollution has become increasingly serious. Harmonics not only degrade power quality and affect the normal operation of electrical equipment, but also increase power system losses, leading to equipment overheating, accelerated insulation aging, and even safety accidents. Passive harmonic filters, as an effective harmonic suppression device, are widely used in power systems to improve power quality.

[0003] Traditional passive harmonic filters have several shortcomings in design and installation. Structurally, most traditional filters use a one-piece enclosed housing design. While this design provides some protection, it has significant shortcomings in heat dissipation. Since filters generate a large amount of heat during operation, the enclosed structure makes it difficult to dissipate this heat effectively, leading to increased internal temperatures. Excessive temperatures not only affect the performance and lifespan of the electronic components but can also cause damage, reducing the filter's reliability and stability. In terms of installation, traditional passive harmonic filters are typically fixed in place. Once installed, subsequent maintenance and replacement become extremely difficult. When a filter malfunctions or requires maintenance, it often necessitates the disassembly of numerous peripheral devices, consuming significant manpower and time, increasing maintenance costs and downtime, and adversely affecting the normal operation of the power system. Furthermore, traditional filters lack effective vibration damping measures during transport. During transport, filters inevitably suffer from vibration and impact. Internal electronic components are sensitive to vibration; excessive vibration can cause components to loosen, lose contact, or even become damaged, further affecting the filter's performance and lifespan. Summary of the Invention

[0004] The purpose of this invention is to address the numerous shortcomings in the design and installation of traditional passive harmonic filters. Structurally, most traditional filters employ a one-piece, enclosed housing design. While this design provides some protection, it suffers from significant deficiencies in heat dissipation. Since filters generate substantial heat during operation, the enclosed structure makes effective heat dissipation difficult, leading to elevated internal temperatures. Excessive heat not only affects the performance and lifespan of electronic components but can also cause damage, reducing the filter's reliability and stability. Regarding installation, traditional passive harmonic filters are typically fixed in place, making subsequent maintenance and replacement extremely difficult once installed. When a filter malfunctions or requires maintenance, it often necessitates the disassembly of numerous peripheral devices, consuming significant manpower and time, increasing maintenance costs and downtime, and negatively impacting the normal operation of the power system. Furthermore, traditional filters lack effective vibration damping measures during transport. During transportation, the filter will inevitably be subjected to vibration and impact. The internal electronic components are sensitive to vibration. Excessive vibration may cause components to loosen, make poor contact or even be damaged, which will further affect the performance and service life of the filter. Therefore, a high-efficiency passive harmonic filter with low temperature rise is proposed.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: It is applied to filter devices to improve the above-mentioned problems.

[0006] The present invention is as follows: The system includes a main bottom shell, a supporting top shell that is vertically fastened to the top surface of the main bottom shell, a rear mating box that is horizontally fixed to one side of the supporting top shell, a cooling fan that is symmetrically fixed to the inner side of the supporting top shell, a wiring main board that is horizontally fixed to the inner side of the supporting top shell, and a supporting bottom frame that is horizontally fixed to the inner side of the supporting top shell. The supporting base frame includes a damping link. The bottom end of the damping link is fixedly connected to the top surface of the supporting base frame near the four ends. A buffer spring is vertically sleeved on the outer side of the damping link. A perforated plate is horizontally fixedly connected to the top of the damping link. A DC reactor is fixedly connected to the top surface of the perforated plate. A contactor is fixedly connected to the top surface of the perforated plate. A passive harmonic filter is fixedly connected to the top surface of the perforated plate. Heat dissipation side plates are uniformly fixedly connected to the outer side of the passive harmonic filter. A wireless motherboard is horizontally fixedly connected to the inner top surface of the supporting top shell. An audible and visual alarm board is horizontally fixedly connected to the inner top surface of the supporting top shell. A control motherboard is horizontally fixedly connected to the inner top surface of the supporting top shell.

[0007] As a preferred technical solution of the present invention, mounting base strips are horizontally and symmetrically welded to the outer side of the main bottom shell. The mounting base strips are parallel and symmetrically fixed at the bottom end of the side of the main bottom shell. Fixed through holes are evenly opened on the top surface of the mounting base strips. The main bottom shell is installed at a designated point through the mounting base strips. Rotating side blocks are symmetrically connected to both sides of the main bottom shell. A center locking groove is vertically and symmetrically opened on the inner side of the main bottom shell. The center locking groove is vertically located at the center line of the inner side of the main bottom shell. A positioning screw is horizontally threaded to the inner side of the center locking groove. The side of the rotating side block is fixedly sleeved at one end of the positioning screw. Vertical locking grooves are symmetrically opened on the inner side of the main bottom shell. The vertical locking grooves are parallel and symmetrically arranged on the inner side of the main bottom shell near the opening end. A sealing buckle plate is fastened to the side opening end of the rear mating box. A wire through groove is evenly opened on the side of the sealing buckle plate. A wiring terminal is evenly fixedly connected to the inner side of the rear mating box. A flipping shaft is symmetrically inserted into the side of the sealing buckle plate.

[0008] As a preferred technical solution of the present invention, maintenance sealing plates are symmetrically fixedly connected to both sides of the supporting top shell, and fixing screws are inserted into the sides of the maintenance sealing plates. The maintenance sealing plates are fixedly and sealed inside the opening of the supporting top shell by fixing screws. An antenna body is fixedly connected to the top surface of the supporting top shell, and a warning light is fixedly connected to the top surface of the supporting top shell. A top storage groove is horizontally opened on the top surface of the supporting top shell. A flip-up connecting block is snapped into the inner side of the top storage groove. A control panel is snapped into the top of the flip-up connecting block. The control panel and the flip-up connecting block are rotatably snapped together. Heat dissipation side grooves are evenly opened on both sides of the supporting top shell. Vertical locking strips are symmetrically fixedly connected to both sides of the supporting top shell. Movable locking strips are symmetrically fixedly connected to the bottom surface of the supporting top shell. The vertical locking strips are vertically snapped into the inner side of the vertical locking groove. The movable locking strips are vertically snapped into the inner side of the middle locking groove, and one end of the positioning screw is pressed into the side position of the movable locking strip.

[0009] As a preferred technical solution of the present invention, the main bottom shell is made of a thermally conductive metal material, and the top surface and both sides of the main bottom shell are open, the bottom surface of the supporting top shell is open, and the bottom opening of the supporting top shell is fastened to the edge of the top opening of the main bottom shell, and the interior of the main bottom shell and the interior of the supporting top shell are in communication.

[0010] As a preferred technical solution of the present invention, the bottom plate of the supporting top shell is vertically and sealedly inserted into the openings on both sides of the main bottom shell, and the side of the bottom plate of the supporting top shell is mated to the side opening end of the vertical slot, and the rear fitting box is horizontally fixedly connected to the side of the bottom plate of the supporting top shell near the bottom end.

[0011] As a preferred technical solution of the present invention, the cooling fans are fixedly and symmetrically arranged on the two symmetrical inner sides of the supporting top shell, and the cooling fans and the heat dissipation side slots are connected to each other. The internal wiring board and multiple wiring terminals are electrically connected to each other.

[0012] As a preferred technical solution of the present invention, the supporting bottom frame is arranged in the shape of a cross-shaped rod, and the ends of the supporting bottom frame are respectively horizontally fixedly connected to the bottom plate side of the supporting top shell and the bottom side of the movable clip. The bottom surface of the supporting bottom frame is horizontally connected to the inner bottom surface of the main bottom shell.

[0013] As a preferred embodiment of the present invention, the number of damping links is four, the top end of the damping links is fixedly connected to the bottom surface of the perforated support plate near the edge, and the top end of the buffer spring is connected to the bottom surface of the perforated support plate.

[0014] As a preferred embodiment of the present invention, the DC reactor, contactor, main board and passive harmonic filter are all electrically connected to each other, the wireless main board and antenna are electrically connected to each other, the audible and visual alarm board and warning light are electrically connected to each other, and the control main board and passive harmonic filter are electrically connected to each other.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the solution of this invention: 1. The supporting top shell and main bottom shell feature a detachable installation design. Through the cooperation of components such as vertical locking strips, vertical locking slots, movable locking strips, a center locking slot, and positioning screws, the supporting top shell can be quickly installed and removed. During installation, simply align the supporting top shell with the main bottom shell, fasten it, and rotate the positioning screw to secure it. For maintenance or repair, simply reverse the positioning screw and pull the supporting top shell upwards to remove it, facilitating inspection, repair, or replacement of internal components without disassembling numerous peripheral devices, significantly saving maintenance time and labor costs, reducing power system downtime, and improving production efficiency. The control panel adopts a flip-up design. When not in use, it can be flipped into the top storage slot, saving space and protecting the control panel. When in use, it can be flipped out for convenient parameter setting and status monitoring. This design satisfies the usage requirements of the control panel while improving the overall aesthetics and practicality of the equipment.

[0016] 2. Through the coordination of the wireless motherboard and antenna, wireless communication between the filter and the remote monitoring system is achieved. Staff can monitor the filter's operating status in real time at the remote monitoring center, including parameters such as current, voltage, and temperature, enabling timely detection and handling of potential problems, thus improving the management efficiency and intelligence level of the power system. The connection between the audible and visual alarm board and warning lights allows for timely issuance of audible and visual alarm signals when the filter malfunctions or experiences abnormalities, alerting staff to take prompt measures to prevent the fault from escalating and reduce accident losses. The control motherboard can automatically adjust and control the operating parameters of the passive harmonic filter according to the actual operating conditions of the power system, ensuring the filter is always in optimal working condition, improving the filter's adaptability and filtering effect, and further improving power quality.

[0017] 3. Damping rods and buffer springs are installed in the support base frame. During filter handling, when subjected to vibration and impact, the damping rods absorb some of the vibration energy through their damping characteristics, while the buffer springs further buffer the vibration, reducing its impact on internal components. The perforated support plate, in conjunction with the damping rods and buffer springs, provides stable support and excellent shock absorption protection for components such as DC reactors, contactors, and passive harmonic filters. This effectively prevents components from becoming loose, having poor contact, or even being damaged due to vibration during handling, improving the filter's vibration resistance and ensuring its safety during transportation and installation. The evenly spaced heat dissipation side slots on both sides of the support top shell, combined with symmetrically fixed cooling fans on the inner side, form an effective airflow channel. The cooling fans draw external cool air into the support top shell, accelerating airflow and allowing heat to be quickly dissipated to the external environment, greatly improving heat dissipation efficiency. The evenly fixed heat dissipation side plates on the outer side of the passive harmonic filter further increase the heat dissipation area, while the perforated structure of the perforated support plate also facilitates airflow, enhancing the heat dissipation effect. These heat dissipation designs effectively reduce the temperature rise of the filter during operation, ensuring that the internal electronic components operate in a suitable temperature environment, improving the performance and lifespan of the components, reducing the failure rate caused by overheating, and improving the reliability and stability of the filter. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional bottom-view connection structure provided by the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional front view connection structure provided by the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional top view connection structure provided by the present invention; Figure 4 A schematic diagram of the overall three-dimensional back connection structure provided by the present invention; Figure 5This is a schematic diagram of the overall separate side view connection structure provided by the present invention; Figure 6 A schematic diagram of the overall separate bottom-view connection structure provided by the present invention; Figure 7 This is a schematic diagram of the overall separate front view connection structure provided by the present invention; Figure 8 This is a schematic diagram of the overall separate top-view connection structure provided by the present invention; Figure 9 This is a schematic diagram of the overall separate side view connection structure provided by the present invention; Figure 10 This is a schematic diagram of the internal connection structure of the supporting top shell provided by the present invention (viewed from below). Figure 11 This is a schematic diagram of the internal side view connection structure of the supporting top shell provided by the present invention.

[0019] The image shows: 1. Main bottom shell; 101. Mounting base strip; 102. Fixing through hole; 103. Rotating side block; 104. Vertical slot; 105. Center slot; 106. Positioning screw; 2. Support top shell; 201. Maintenance cover plate; 202. Fixing screw; 203. Antenna body; 204. Warning light; 205. Top storage slot; 206. Flip-over connecting block; 207. Control panel; 208. Heat dissipation side slot; 209. Vertical slot strip; 210. Movable clip 3. Rear fitting box; 301. Sealing buckle plate; 302. Wire through groove; 303. Wiring terminal; 304. Flip shaft; 4. Cooling fan; 5. Wiring main board; 6. Support base frame; 601. Damping connecting rod; 602. Buffer spring; 603. Multi-hole support plate; 604. DC reactor; 605. Contactor; 606. Passive harmonic filter; 607. Heat dissipation side plate; 7. Wireless main board; 8. Audible and visual alarm board; 9. Control main board. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1: like Figure 1-11As shown, the present invention provides a technical solution: a high-efficiency passive harmonic filter with low temperature rise, comprising a main bottom shell 1, a supporting top shell 2 vertically fastened to the top surface of the main bottom shell 1, maintenance sealing plates 201 symmetrically fixedly connected to both sides of the supporting top shell 2, fixing screws 202 inserted into the sides of the maintenance sealing plates 201, the maintenance sealing plates 201 being fixedly and sealed inside the opening of the supporting top shell 2 by the fixing screws 202, an antenna body 203 fixedly connected to the top surface of the supporting top shell 2, a warning light 204 fixedly connected to the top surface of the supporting top shell 2, a top storage groove 205 horizontally opened on the top surface of the supporting top shell 2, a flip-up connecting block 206 snapped into the inner side of the top storage groove 205, and a control panel 207 snapped into the top of the flip-up connecting block 206. The control panel 207 and the flip-connecting block 206 are rotatably snapped together. Heat dissipation grooves 208 are evenly distributed on both sides of the supporting top shell 2. Vertical locking strips 209 are symmetrically fixed to both sides of the supporting top shell 2. Movable locking strips 210 are symmetrically fixed to the bottom surface of the supporting top shell 2. The main bottom shell 1 is made of a heat-conducting metal material, and its top surface and both sides are open. The bottom surface of the supporting top shell 2 is open, and the bottom opening of the supporting top shell 2 is snapped onto the edge of the top opening of the main bottom shell 1. The interior of the main bottom shell 1 and the interior of the supporting top shell 2 are in communication. The vertical locking strips 209 are vertically snapped onto the inner side of the vertical locking groove 104, and the movable locking strips 210 are vertically snapped onto the middle locking groove 1. The inner side of 05, and one end of the positioning screw 106 is pressed and set on the side of the movable retaining strip 210. The side of the supporting top shell 2 is horizontally fixedly connected to the rear mating box 3. The outer side of the main bottom shell 1 is horizontally symmetrically fixedly welded with mounting bottom strips 101. The mounting bottom strips 101 are parallel and symmetrically fixedly set at the bottom end of the side of the main bottom shell 1. The top surface of the mounting bottom strips 101 is evenly provided with fixing through holes 102. The main bottom shell 1 is installed at the designated point through the mounting bottom strips 101. The two sides of the main bottom shell 1 are symmetrically connected with rotating side blocks 103. The inner side of the main bottom shell 1 is vertically symmetrically provided with a center locking groove 105. The center locking groove 105 is vertically set at the inner center line of the main bottom shell 1. The inner side of the center locking groove 105 is... A horizontal threaded connection is provided with a positioning screw 106. The side of the rotating side block 103 is fixedly sleeved at one end of the positioning screw 106. Vertical slots 104 are symmetrically provided on the inner side of the main bottom housing 1. The vertical slots 104 are parallel and symmetrically arranged on the inner side of the main bottom housing 1 near the opening end. A sealing buckle plate 301 is fastened to the side opening end of the rear mating box 3. Wire through grooves 302 are evenly provided on the side of the sealing buckle plate 301. A terminal 303 is evenly fixedly connected to the inner side of the rear mating box 3. A flipping shaft 304 is symmetrically inserted into the side of the sealing buckle plate 301. The bottom plate of the supporting top housing 2 is vertically and sealedly inserted into the two openings on both sides of the main bottom housing 1, and the side of the bottom plate of the supporting top housing 2 is mated to the side opening end of the vertical slot 104.The rear-mounted box 3 is horizontally fixedly connected to the bottom side of the supporting top shell 2 near the bottom end, and cooling fans 4 are symmetrically fixedly connected to the inner side of the supporting top shell 2.

[0022] The top support shell 2 and the main bottom shell 1 are designed for detachable installation. Through the cooperation of components such as the vertical locking strip 209, vertical locking groove 104, movable locking strip 210, central locking groove 105, and positioning screw 106, the top support shell 2 can be quickly installed and removed. During installation, simply align the top support shell 2 with the main bottom shell 1, fasten it, and rotate the positioning screw 106 to secure it.

[0023] Example 2: like Figure 1-11As shown, the present invention provides a technical solution: a high-efficiency passive harmonic filter with low temperature rise, comprising a main bottom shell 1, a supporting top shell 2 vertically fastened to the top surface of the main bottom shell 1, maintenance sealing plates 201 symmetrically fixedly connected to both sides of the supporting top shell 2, fixing screws 202 inserted into the sides of the maintenance sealing plates 201, the maintenance sealing plates 201 being fixedly and sealed inside the opening of the supporting top shell 2 by the fixing screws 202, an antenna body 203 fixedly connected to the top surface of the supporting top shell 2, a warning light 204 fixedly connected to the top surface of the supporting top shell 2, a top storage groove 205 horizontally opened on the top surface of the supporting top shell 2, a flip-up connecting block 206 snapped into the inner side of the top storage groove 205, and a control panel 207 snapped into the top of the flip-up connecting block 206. The control panel 207 and the flip-connecting block 206 are rotatably snapped together. Heat dissipation grooves 208 are evenly distributed on both sides of the supporting top shell 2. Vertical locking strips 209 are symmetrically fixed to both sides of the supporting top shell 2. Movable locking strips 210 are symmetrically fixed to the bottom surface of the supporting top shell 2. The main bottom shell 1 is made of a heat-conducting metal material, and its top surface and both sides are open. The bottom surface of the supporting top shell 2 is open, and the bottom opening of the supporting top shell 2 is snapped onto the edge of the top opening of the main bottom shell 1. The interior of the main bottom shell 1 and the interior of the supporting top shell 2 are in communication. The vertical locking strips 209 are vertically snapped onto the inner side of the vertical locking groove 104, and the movable locking strips 210 are vertically snapped onto the middle locking groove 1. The inner side of 05, and one end of the positioning screw 106 is pressed and set on the side of the movable retaining strip 210. The side of the supporting top shell 2 is horizontally fixedly connected to the rear mating box 3. The outer side of the main bottom shell 1 is horizontally symmetrically fixedly welded with mounting bottom strips 101. The mounting bottom strips 101 are parallel and symmetrically fixedly set at the bottom end of the side of the main bottom shell 1. The top surface of the mounting bottom strips 101 is evenly provided with fixing through holes 102. The main bottom shell 1 is installed at the designated point through the mounting bottom strips 101. The two sides of the main bottom shell 1 are symmetrically connected with rotating side blocks 103. The inner side of the main bottom shell 1 is vertically symmetrically provided with a center locking groove 105. The center locking groove 105 is vertically set at the inner center line of the main bottom shell 1. The inner side of the center locking groove 105 is... A horizontal threaded connection is provided with a positioning screw 106. The side of the rotating side block 103 is fixedly sleeved at one end of the positioning screw 106. Vertical slots 104 are symmetrically provided on the inner side of the main bottom housing 1. The vertical slots 104 are parallel and symmetrically arranged on the inner side of the main bottom housing 1 near the opening end. A sealing buckle plate 301 is fastened to the side opening end of the rear mating box 3. Wire through grooves 302 are evenly provided on the side of the sealing buckle plate 301. A terminal 303 is evenly fixedly connected to the inner side of the rear mating box 3. A flipping shaft 304 is symmetrically inserted into the side of the sealing buckle plate 301. The bottom plate of the supporting top housing 2 is vertically and sealedly inserted into the two openings on both sides of the main bottom housing 1, and the side of the bottom plate of the supporting top housing 2 is mated to the side opening end of the vertical slot 104.The rear assembly box 3 is horizontally fixedly connected to the bottom plate side of the supporting top shell 2 near the bottom end. A cooling fan 4 is symmetrically fixedly connected to the inner side of the supporting top shell 2. A wiring main board 5 is horizontally fixedly connected to the inner side of the supporting top shell 2. The cooling fans 4 are symmetrically fixedly arranged parallel to each other on the two symmetrical inner sides of the supporting top shell 2, and the cooling fans 4 are connected to the heat dissipation side slot 208. The wiring main board 5 is electrically connected to multiple wiring terminals 303. A supporting bottom frame 6 is horizontally fixedly connected to the inner side of the supporting top shell 2. The supporting bottom frame 6 is in the shape of a cross-shaped rod, and its ends are horizontally fixedly connected to the bottom plate side of the supporting top shell 2 and the bottom side of the movable retaining strip 210, respectively. The bottom surface of the supporting bottom frame 6 is horizontally aligned with the inner bottom surface of the main bottom shell 1.

[0024] The control panel 207 features a flip-up design, allowing it to be stored in the top storage slot 205 when not in use, saving space and protecting the control panel 207. When in use, it can be flipped out for easy parameter setting and status monitoring by the operator. This design not only meets the usage requirements of the control panel but also improves the overall aesthetics and practicality of the equipment.

[0025] Example 3: like Figure 1-11As shown, the present invention provides a technical solution: a high-efficiency passive harmonic filter with low temperature rise, comprising a main bottom shell 1, a supporting top shell 2 vertically fastened to the top surface of the main bottom shell 1, maintenance sealing plates 201 symmetrically fixedly connected to both sides of the supporting top shell 2, fixing screws 202 inserted into the sides of the maintenance sealing plates 201, the maintenance sealing plates 201 being fixedly and sealed inside the opening of the supporting top shell 2 by the fixing screws 202, an antenna body 203 fixedly connected to the top surface of the supporting top shell 2, a warning light 204 fixedly connected to the top surface of the supporting top shell 2, a top storage groove 205 horizontally opened on the top surface of the supporting top shell 2, a flip-up connecting block 206 snapped into the inner side of the top storage groove 205, and a control panel 207 snapped into the top of the flip-up connecting block 206. The control panel 207 and the flip-connecting block 206 are rotatably snapped together. Heat dissipation grooves 208 are evenly distributed on both sides of the supporting top shell 2. Vertical locking strips 209 are symmetrically fixed to both sides of the supporting top shell 2. Movable locking strips 210 are symmetrically fixed to the bottom surface of the supporting top shell 2. The main bottom shell 1 is made of a heat-conducting metal material, and its top surface and both sides are open. The bottom surface of the supporting top shell 2 is open, and the bottom opening of the supporting top shell 2 is snapped onto the edge of the top opening of the main bottom shell 1. The interior of the main bottom shell 1 and the interior of the supporting top shell 2 are in communication. The vertical locking strips 209 are vertically snapped onto the inner side of the vertical locking groove 104, and the movable locking strips 210 are vertically snapped onto the middle locking groove 1. The inner side of 05, and one end of the positioning screw 106 is pressed and set on the side of the movable retaining strip 210. The side of the supporting top shell 2 is horizontally fixedly connected to the rear mating box 3. The outer side of the main bottom shell 1 is horizontally symmetrically fixedly welded with mounting bottom strips 101. The mounting bottom strips 101 are parallel and symmetrically fixedly set at the bottom end of the side of the main bottom shell 1. The top surface of the mounting bottom strips 101 is evenly provided with fixing through holes 102. The main bottom shell 1 is installed at the designated point through the mounting bottom strips 101. The two sides of the main bottom shell 1 are symmetrically connected with rotating side blocks 103. The inner side of the main bottom shell 1 is vertically symmetrically provided with a center locking groove 105. The center locking groove 105 is vertically set at the inner center line of the main bottom shell 1. The inner side of the center locking groove 105 is... A horizontal threaded connection is provided with a positioning screw 106. The side of the rotating side block 103 is fixedly sleeved at one end of the positioning screw 106. Vertical slots 104 are symmetrically provided on the inner side of the main bottom housing 1. The vertical slots 104 are parallel and symmetrically arranged on the inner side of the main bottom housing 1 near the opening end. A sealing buckle plate 301 is fastened to the side opening end of the rear mating box 3. Wire through grooves 302 are evenly provided on the side of the sealing buckle plate 301. A terminal 303 is evenly fixedly connected to the inner side of the rear mating box 3. A flipping shaft 304 is symmetrically inserted into the side of the sealing buckle plate 301. The bottom plate of the supporting top housing 2 is vertically and sealedly inserted into the two openings on both sides of the main bottom housing 1, and the side of the bottom plate of the supporting top housing 2 is mated to the side opening end of the vertical slot 104.The rear-mounted box 3 is horizontally fixedly connected to the side of the bottom plate of the supporting top shell 2 near the bottom end. A cooling fan 4 is symmetrically fixedly connected to the inner side of the supporting top shell 2. A wiring main board 5 is horizontally fixedly connected to the inner side of the supporting top shell 2. The cooling fans 4 are symmetrically fixedly arranged parallel to each other on the two symmetrical inner sides of the supporting top shell 2, and the cooling fans 4 are in communication with the heat dissipation side slot 208. The wiring main board 5 is electrically connected to multiple wiring terminals 303. A supporting bottom frame 6 is horizontally fixedly connected to the inner side of the supporting top shell 2. The supporting bottom frame 6 is in the shape of a cross-shaped rod, and its ends are horizontally fixedly connected to the side of the bottom plate of the supporting top shell 2 and the bottom side of the movable retaining strip 210, respectively. The bottom surface of the supporting bottom frame 6 is horizontally aligned with the inner bottom surface of the main bottom shell 1. The supporting base frame 6 includes a damping link 601. The bottom end of the damping link 601 is fixedly connected to the top surface of the supporting base frame 6 near the four ends. A buffer spring 602 is vertically sleeved on the outer side of the damping link 601. A perforated support plate 603 is horizontally fixedly connected to the top end of the damping link 601. There are four damping links 601. The top end of the damping link 601 is fixedly connected to the bottom surface of the perforated support plate 603 near the edge. The top end of the buffer spring 602 is mated to the bottom surface of the perforated support plate 603. A DC reactor 604 is fixedly connected to the top surface of the perforated support plate 603.

[0026] By providing a damping link 601 and a buffer spring 602 in the supporting base frame 6, when the filter is subjected to vibration and impact during transportation, the damping link 601 can absorb part of the vibration energy through its own damping characteristics, and the buffer spring 602 can further buffer the vibration and reduce the impact of vibration on the internal components.

[0027] Example 4: like Figure 1-11As shown, the present invention provides a technical solution: a high-efficiency passive harmonic filter with low temperature rise, comprising a main bottom shell 1, a supporting top shell 2 vertically fastened to the top surface of the main bottom shell 1, maintenance sealing plates 201 symmetrically fixedly connected to both sides of the supporting top shell 2, fixing screws 202 inserted into the sides of the maintenance sealing plates 201, the maintenance sealing plates 201 being fixedly and sealed inside the opening of the supporting top shell 2 by the fixing screws 202, an antenna body 203 fixedly connected to the top surface of the supporting top shell 2, a warning light 204 fixedly connected to the top surface of the supporting top shell 2, a top storage groove 205 horizontally opened on the top surface of the supporting top shell 2, a flip-up connecting block 206 snapped into the inner side of the top storage groove 205, and a control panel 207 snapped into the top of the flip-up connecting block 206. The control panel 207 and the flip-connecting block 206 are rotatably snapped together. Heat dissipation grooves 208 are evenly distributed on both sides of the supporting top shell 2. Vertical locking strips 209 are symmetrically fixed to both sides of the supporting top shell 2. Movable locking strips 210 are symmetrically fixed to the bottom surface of the supporting top shell 2. The main bottom shell 1 is made of a heat-conducting metal material, and its top surface and both sides are open. The bottom surface of the supporting top shell 2 is open, and the bottom opening of the supporting top shell 2 is snapped onto the edge of the top opening of the main bottom shell 1. The interior of the main bottom shell 1 and the interior of the supporting top shell 2 are in communication. The vertical locking strips 209 are vertically snapped onto the inner side of the vertical locking groove 104, and the movable locking strips 210 are vertically snapped onto the middle locking groove 1. The inner side of 05, and one end of the positioning screw 106 is pressed and set on the side of the movable retaining strip 210. The side of the supporting top shell 2 is horizontally fixedly connected to the rear mating box 3. The outer side of the main bottom shell 1 is horizontally symmetrically fixedly welded with mounting bottom strips 101. The mounting bottom strips 101 are parallel and symmetrically fixedly set at the bottom end of the side of the main bottom shell 1. The top surface of the mounting bottom strips 101 is evenly provided with fixing through holes 102. The main bottom shell 1 is installed at the designated point through the mounting bottom strips 101. The two sides of the main bottom shell 1 are symmetrically connected with rotating side blocks 103. The inner side of the main bottom shell 1 is vertically symmetrically provided with a center locking groove 105. The center locking groove 105 is vertically set at the inner center line of the main bottom shell 1. The inner side of the center locking groove 105 is... A horizontal threaded connection is provided with a positioning screw 106. The side of the rotating side block 103 is fixedly sleeved at one end of the positioning screw 106. Vertical slots 104 are symmetrically provided on the inner side of the main bottom housing 1. The vertical slots 104 are parallel and symmetrically arranged on the inner side of the main bottom housing 1 near the opening end. A sealing buckle plate 301 is fastened to the side opening end of the rear mating box 3. Wire through grooves 302 are evenly provided on the side of the sealing buckle plate 301. A terminal 303 is evenly fixedly connected to the inner side of the rear mating box 3. A flipping shaft 304 is symmetrically inserted into the side of the sealing buckle plate 301. The bottom plate of the supporting top housing 2 is vertically and sealedly inserted into the two openings on both sides of the main bottom housing 1, and the side of the bottom plate of the supporting top housing 2 is mated to the side opening end of the vertical slot 104.The rear-mounted box 3 is horizontally fixedly connected to the side of the bottom plate of the supporting top shell 2 near the bottom end. A cooling fan 4 is symmetrically fixedly connected to the inner side of the supporting top shell 2. A wiring main board 5 is horizontally fixedly connected to the inner side of the supporting top shell 2. The cooling fans 4 are symmetrically fixedly arranged parallel to each other on the two symmetrical inner sides of the supporting top shell 2, and the cooling fans 4 are in communication with the heat dissipation side slot 208. The wiring main board 5 is electrically connected to multiple wiring terminals 303. A supporting bottom frame 6 is horizontally fixedly connected to the inner side of the supporting top shell 2. The supporting bottom frame 6 is in the shape of a cross-shaped rod, and its ends are horizontally fixedly connected to the side of the bottom plate of the supporting top shell 2 and the bottom side of the movable retaining strip 210, respectively. The bottom surface of the supporting bottom frame 6 is horizontally aligned with the inner bottom surface of the main bottom shell 1. The supporting base frame 6 includes damping links 601. The bottom end of the damping link 601 is fixedly connected to the top surface of the supporting base frame 6 near the four ends. A buffer spring 602 is vertically sleeved on the outer side of the damping link 601. A perforated support plate 603 is horizontally fixedly connected to the top end of the damping link 601. There are four damping links 601. The top end of the damping link 601 is fixedly connected to the bottom surface of the perforated support plate 603 near the edge. The top end of the buffer spring 602 is mated to the bottom surface of the perforated support plate 603. A DC reactor 604 is fixedly connected to the top surface of the perforated support plate 603. A contactor 605 is fixedly connected to the top surface of the perforated support plate 603. A passive harmonic filter 606 is connected, and heat dissipation side plates 607 are evenly fixedly connected to the outer side of the passive harmonic filter 606. A wireless main board 7 is horizontally fixedly connected to the inner top surface of the supporting top shell 2. An audible and visual alarm board 8 is horizontally fixedly connected to the inner top surface of the supporting top shell 2. A control main board 9 is horizontally fixedly connected to the inner top surface of the supporting top shell 2. The DC reactor 604, contactor 605, wiring main board 5 and passive harmonic filter 606 are all electrically connected to each other. The wireless main board 7 and antenna 203 are electrically connected to each other. The audible and visual alarm board 8 and warning light 204 are electrically connected to each other. The control main board 9 and passive harmonic filter 606 are electrically connected to each other.

[0028] The perforated support plate 603, in conjunction with the damping link 601 and the buffer spring 602, provides stable support and good shock absorption protection for components such as the DC reactor 604, contactor 605, and passive harmonic filter 606. This effectively avoids problems such as component loosening, poor contact, or even damage caused by vibration during transportation, improves the filter's vibration resistance, and ensures the safety of the filter during transportation and installation.

[0029] Working principle: The main bottom shell 1 is securely installed on the ground or other supporting structure using appropriate bolts through the evenly spaced fixing through holes 102 on the top surface of the mounting base strip 101. Pick up the supporting top shell 2, align the open portion of its bottom surface with the edge of the top opening of the main bottom shell 1, and slowly snap it downwards. During the snapping process, ensure that the vertical locking strips 209 symmetrically fixed on both sides of the supporting top shell 2 are accurately and vertically engaged with the inner sides of the symmetrically opened vertical locking grooves 104 on the inner side of the main bottom shell 1, while simultaneously, the movable locking strips 210 symmetrically fixed on the bottom surface of the supporting top shell 2 are vertically engaged with the inner sides of the symmetrically opened central locking grooves 105 on the inner side of the main bottom shell 1. Once the movable retaining strip 210 is engaged, rotate the rotating side blocks 103 that are symmetrically connected on both sides of the main bottom housing 1. Since the side of the rotating side block 103 is fixedly sleeved at one end of the positioning screw 106, rotating the rotating side block 103 will cause the positioning screw 106 to rotate horizontally in the middle retaining groove 105 until one end of the positioning screw 106 is pressed against the side of the movable retaining strip 210, thereby firmly fixing the supporting top housing 2 to the main bottom housing 1 and ensuring that the interior of the main bottom housing 1 and the interior of the supporting top housing 2 remain in communication.

[0030] A DC reactor 604, a contactor 605, and a passive harmonic filter 606 are sequentially installed on a support frame 6 horizontally fixed to the bottom inner surface of the support top shell 2. The DC reactor 604, contactor 605, and passive harmonic filter 606 are then fixed to a perforated support plate 603 horizontally fixed to the top surface of the support frame 6. The perforated support plate 603 not only provides a stable support platform for the components, but its perforated structure also facilitates airflow and enhances heat dissipation. For the passive harmonic filter 606, the heat dissipation side plates 607, evenly fixed to its outer edges, further increase the heat dissipation area, helping to quickly dissipate the heat generated by the filter. Cooling fans 4, symmetrically fixed to the inner sides of the support top shell 2, are installed in appropriate positions, ensuring that the cooling fans 4 are parallel and symmetrically fixed to the two symmetrical inner sides of the support top shell 2, and are in communication with the heat dissipation side slots 208 evenly opened on both sides of the support top shell 2. This allows the cooling fans 4 to draw external cold air into the support top shell 2, accelerating airflow and carrying away the heat generated by the internal components.

[0031] The main board 5, horizontally fixed to the inner side of the supporting top shell 2, is electrically connected to the DC reactor 604, contactor 605, and passive harmonic filter 606 to ensure normal signal transmission between the components. Simultaneously, the main board 5 and the terminal blocks 303, evenly fixed to the inner side of the rear mating box 3, are electrically connected to each other to enable the filter to connect to external circuits. The rear mating box 3 is horizontally fixed to the bottom side of the supporting top shell 2 near the bottom. The sealing plate 301, which is fastened to the side opening of the rear mating box 3, is opened, and the external wiring to be connected is passed through the evenly spaced wire slots 302 on the side of the sealing plate 301 into the rear mating box 3, and reliably connected to the terminal blocks 303. After connection, the sealing plate 301 is fastened back to the side opening of the rear mating box 3 to ensure a good seal and prevent dust and moisture from entering. The wireless main board 7, the audible and visual alarm board 8, and the control main board 9 are horizontally fixed to the inner top surface of the supporting top shell 2. The wireless motherboard 7 is electrically connected to the antenna 203, which is fixedly connected to the top surface of the supporting top shell 2. Wireless communication between the filter and the remote monitoring system is achieved through the antenna 203, facilitating remote monitoring of the filter's operating status by staff. The audible and visual alarm board 8 is electrically connected to the warning light 204, which is fixedly connected to the top surface of the supporting top shell 2. When the filter malfunctions or experiences an abnormality, the audible and visual alarm board 8 can control the warning light 204 to emit an audible and visual alarm signal, promptly alerting staff to take appropriate action.

[0032] The control board 9 is electrically connected to the passive harmonic filter 606. The control board 9 can adjust and control the operating parameters of the passive harmonic filter 606 according to the actual operating conditions of the power system, ensuring that the filter is always in optimal working condition. The control panel 207 is snapped into the inner side of the top storage slot 205 horizontally opened on the top surface of the supporting top shell 2 via a flip-up connecting block 206. The control panel 207 and the flip-up connecting block 206 are connected by a rotating snap-fit ​​mechanism, allowing the control panel 207 to be flipped and stored in the top storage slot 205 when not in use, saving space and protecting the control panel 207.

[0033] Connect the filter power supply and perform initial debugging using the control panel 207, setting relevant parameters such as filtering frequency and operating mode. Observe the filter's operating status, checking whether all indicator lights are displaying normally and whether the cooling fan 4 is operating normally to ensure the filter is working properly. During daily use, monitor the filter's operating parameters in real time, such as current, voltage, and temperature, using a remote monitoring system or the control panel 207. Regularly inspect the filter's appearance for abnormal overheating, oil leaks, or other issues.

[0034] When maintenance or repair is required, first disconnect the filter power supply, then rotate the positioning screw 106 so that one end moves away from the side of the movable retaining strip 210, releasing the fixation on the support top shell 2. Pull the support top shell 2 upwards to remove it from the main bottom shell 1, allowing for easy inspection, repair, or replacement of internal components. After maintenance, reinstall the support top shell 2 onto the main bottom shell 1 following the above installation steps to restore the filter to normal operation.

[0035] All technical features in this embodiment can be freely combined according to actual needs.

[0036] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency, low-temperature-rise passive harmonic filter, comprising a main base housing (1), characterized in that, The top surface of the main bottom shell (1) is vertically fastened with a supporting top shell (2), a rear mating box (3) is horizontally fixedly connected to one side of the supporting top shell (2), a cold air fan (4) is symmetrically fixedly connected to the inner side of the supporting top shell (2), a wiring main board (5) is horizontally fixedly connected to the inner side of the supporting top shell (2), and a supporting bottom frame (6) is horizontally fixedly connected to the inner side of the supporting top shell (2). The supporting base frame (6) includes a damping link (601). The bottom end of the damping link (601) is fixedly connected to the top surface of the supporting base frame (6) near the four ends. A buffer spring (602) is vertically sleeved on the outer side of the damping link (601). A perforated plate (603) is horizontally fixedly connected to the top end of the damping link (601). A DC reactor (604) is fixedly connected to the top surface of the perforated plate (603). The top surface of the perforated plate (603) is fixedly... A contactor (605) is connected to the top surface of the perforated plate (603), a passive harmonic filter (606) is fixedly connected to the top surface of the perforated plate (603), a heat dissipation side plate (607) is uniformly fixedly connected to the outer side of the passive harmonic filter (606), a wireless motherboard (7) is horizontally fixedly connected to the inner top surface of the supporting top shell (2), an audible and visual alarm board (8) is horizontally fixedly connected to the inner top surface of the supporting top shell (2), and a control motherboard (9) is horizontally fixedly connected to the inner top surface of the supporting top shell (2).

2. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The outer side of the main bottom shell (1) is horizontally and symmetrically fixedly welded with mounting base strips (101). The mounting base strips (101) are parallel and symmetrically fixedly arranged at the bottom end of the side of the main bottom shell (1). The top surface of the mounting base strips (101) is uniformly provided with fixing through holes (102). The main bottom shell (1) is installed at a designated point through the mounting base strips (101). The two sides of the main bottom shell (1) are symmetrically connected with rotating side blocks (103). The inner side of the main bottom shell (1) is vertically and symmetrically provided with center locking grooves (105). The center locking grooves (105) are vertically arranged at the center line of the inner side of the main bottom shell (1). The inner side of the center locking grooves (105) is... A positioning screw (106) is connected to the horizontal thread on the side. The side of the rotating side block (103) is fixedly sleeved at one end of the positioning screw (106). The inner side of the main bottom shell (1) is symmetrically provided with vertical slots (104). The vertical slots (104) are parallel and symmetrically provided on the inner side of the main bottom shell (1) near the opening end. The side opening end of the rear mating box (3) is fastened with a sealing buckle plate (301). The side of the sealing buckle plate (301) is evenly provided with wire through slots (302). The inner side of the rear mating box (3) is evenly fixedly connected with a wiring terminal (303). The side of the sealing buckle plate (301) is symmetrically inserted with a flipping shaft (304).

3. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, Maintenance sealing plates (201) are symmetrically fixedly connected to both sides of the supporting top shell (2). Fixing screws (202) are inserted into the sides of the maintenance sealing plates (201). The maintenance sealing plates (201) are fixedly and sealed inside the opening of the supporting top shell (2) by the fixing screws (202). An antenna body (203) is fixedly connected to the top surface of the supporting top shell (2). A warning light (204) is fixedly connected to the top surface of the supporting top shell (2). A top storage groove (205) is horizontally opened on the top surface of the supporting top shell (2). A flipping connecting block (206) is snapped into the inner side of the top storage groove (205). A top of the flipping connecting block (206) is snapped into the top. The control panel (207) and the flip block (206) are connected by a rotating snap-fit. The two sides of the support top shell (2) are evenly provided with heat dissipation side grooves (208). The two sides of the support top shell (2) are symmetrically fixedly connected with vertical clips (209). The bottom surface of the support top shell (2) is symmetrically fixedly connected with movable clips (210). The vertical clips (209) are vertically snap-fitted into the inner side of the vertical clip groove (104). The movable clips (210) are vertically snap-fitted into the inner side of the middle clip groove (105). One end of the positioning screw (106) is pressed into the side position of the movable clips (210).

4. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The main bottom shell (1) is made of a heat-conducting metal material, and the top surface and both sides of the main bottom shell (1) are open. The bottom surface of the supporting top shell (2) is open, and the bottom opening of the supporting top shell (2) is fastened to the edge of the top opening of the main bottom shell (1). The interior of the main bottom shell (1) and the interior of the supporting top shell (2) are in communication.

5. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The bottom plate of the supporting top shell (2) is vertically sealed and inserted into the openings on both sides of the main bottom shell (1), and the side of the bottom plate of the supporting top shell (2) is connected to the side opening end of the vertical slot (104). The rear fitting box (3) is horizontally fixedly connected to the side of the bottom plate of the supporting top shell (2) near the bottom end.

6. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The cooling fans (4) are fixedly and symmetrically arranged on the two symmetrical inner sides of the supporting top shell (2), and the cooling fans (4) and the heat dissipation side groove (208) are connected to each other. The inside of the wiring board (5) and the multiple wiring terminals (303) are electrically connected to each other.

7. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The supporting bottom frame (6) is set in the shape of a cross-shaped rod, and the ends of the supporting bottom frame (6) are respectively horizontally fixedly connected to the bottom plate side of the supporting top shell (2) and the side bottom of the movable clip (210). The bottom surface of the supporting bottom frame (6) is horizontally connected to the inner bottom surface of the main bottom shell (1).

8. The high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The number of damping links (601) is four. The top end of the damping link (601) is fixedly connected to the bottom surface of the perforated support plate (603) near the edge. The top end of the buffer spring (602) is connected to the bottom surface of the perforated support plate (603).

9. A high-efficiency, low-temperature-rise passive harmonic filter according to claim 1, characterized in that, The DC reactor (604), contactor (605), wiring board (5) and passive harmonic filter (606) are all electrically connected to each other. The wireless board (7) and antenna (203) are electrically connected to each other. The audible and visual alarm board (8) and warning light (204) are electrically connected to each other. The control board (9) and passive harmonic filter (606) are electrically connected to each other.

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