A communication shield structure and inverter

Abstract

This utility model discloses a communication cover structure and an inverter, relating to the field of protection structures for power electronic equipment. The base is fixedly installed on the inverter housing, and a first sealing ring is provided between the base and the inverter housing to form a sealed fit. The housing is snapped onto the base, and a second sealing ring is provided between the housing and the base to form a sealed fit. A cable guide is sealed onto the housing, and it has a cable passage hole for the cable to pass through and form a sealed contact, thus forming a sealed fit with the cable. The first sealing ring, the second sealing ring, and the cable guide form a three-level sealing system, reducing the risk of water ingress into the inverter. The housing snap-fit ​​onto the base forms a quick-assembly structure, facilitating customer connection.

Description

Technical Field

[0001] This utility model relates to the field of protective structures for power electronic equipment, and further to a communication cover structure and an inverter. Background Technology

[0002] The inverter's communication interface is a key channel connecting the inverter with external monitoring systems, data acquisition units, grid dispatching, or local commissioning tools. Its type and protocol directly affect the system's monitorability, controllability, and compatibility.

[0003] A communication shield is a structure installed at the inverter's communication interface to protect the communication cables. Traditional inverter communication shields have at least the following shortcomings:

[0004] 1. Poor sealing: Communication covers often use single-layer sealing rings, which are prone to failure under vibration, leading to dust / moisture intrusion and PCB failure.

[0005] 2. Low assembly efficiency: The communication cover is mostly fastened with bolts, which requires tightening each screw individually, making installation time-consuming. Utility Model Content

[0006] The core of this utility model is to provide a communication cover structure that adopts a three-level sealing system to reduce the risk of water ingress into the inverter and to enable quick assembly and convenient connection. The specific solution is as follows:

[0007] A communication shield structure, comprising:

[0008] The base is fixedly installed on the inverter housing, and a first sealing ring is provided between the base and the inverter housing;

[0009] The housing is snap-fitted to the base, and a second sealing ring is provided between the housing and the base;

[0010] The cable guide body is sealed and assembled into the housing, and has a cable pass-through hole for the cable to pass through and form a sealed contact.

[0011] Optionally, elastic arms are provided on opposite sides of the housing, with one end of the elastic arm fixed to the housing and the other end suspended; the sidewall of the elastic arm is provided with a protruding buckle;

[0012] The base is provided with fixing blocks on opposite sides, and the fixing blocks are provided with slots or holes.

[0013] The protruding buckle is used to engage with the card hole or the card slot for locking.

[0014] Optionally, the base is provided with a plurality of fixing holes and at least one first connecting hole, the fixing holes being used for a first screw to pass through and be fixed to the inverter housing;

[0015] The housing is provided with a second connecting hole, and the first connecting hole and the second connecting hole are used to cooperate for a second screw to fix the connection.

[0016] Optionally, a fracture crack is provided on the side wall of the threading body corresponding to each of the wire holes.

[0017] Optionally, the wire hole is used to mate with a male cable connector for installing a cable, and the side wall of the male cable connector is provided with a first limiting ring and a second limiting ring;

[0018] The wire-passing hole is a stepped hole, and the larger diameter of the hole is used to accommodate the first limiting ring.

[0019] The cable passage hole is optionally equipped with a plug, which is used to insert into the cable passage hole when no cable is installed.

[0020] Optionally, the housing is provided with a first stepped hole, and the threading body and clamp are inserted into the first stepped hole;

[0021] One end of the threading body contacts the stepped surface of the first stepped hole, and the clamp is fitted onto the outside of the threading body;

[0022] The housing is provided with external threads, and the nut is connected to the external threads and squeezes the clamp, thereby pressing the threading body radially.

[0023] Optionally, a plurality of compression blocks are provided at one end of the clamp exposed in the first stepped hole, and the ends of the compression blocks are provided with radially contracting bends.

[0024] Optionally, a limiting seat is provided inside the housing, and a magnetic ring is installed between the limiting seat and the cable threading body; the magnetic ring is used for the cable to pass through.

[0025] The limiting seat is a spaced-out protrusion structure, or the limiting seat is a complete ring.

[0026] Optionally, a sealing sleeve is fitted outside the threading body, and the sealing sleeve is located inside the clamp.

[0027] This utility model also provides an inverter, including the communication cover structure described in any of the above claims.

[0028] This utility model provides a communication cover structure. The base is fixedly installed on the inverter housing, and a first sealing ring is provided between the base and the inverter housing to form a sealed fit. The housing is snapped onto the base, and a second sealing ring is provided between the housing and the base to form a sealed fit. The cable guide is sealed onto the housing, and has a cable hole for the cable to pass through and form a sealed contact, forming a sealed fit with the cable. The first sealing ring, the second sealing ring, and the cable guide form a three-level sealing system to reduce the risk of water ingress into the inverter. The housing snap-fit ​​is assembled onto the base to form a quick assembly structure, which is convenient for customers to plug in. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 Front view of the inverter enclosure with the mounting base installed;

[0031] Figure 2A This is an exploded view of the first embodiment of the communication cover structure of this utility model;

[0032] Figure 2B This is a front view of the first embodiment of the communication cover structure of this utility model;

[0033] Figure 2C This is a cross-sectional view of the first embodiment of the communication cover structure of this utility model;

[0034] Figure 3A This is an exploded view of a second embodiment of the communication cover structure of this utility model;

[0035] Figure 3B This is a front view of a second embodiment of the communication cover structure of this utility model;

[0036] Figure 3C This is a cross-sectional view of the second embodiment of the communication cover structure of this utility model.

[0037] The image includes:

[0038] Base 10; First sealing ring 101; First screw 102; Fixing block 110; Snap hole 111; Snap groove 112; Fixing hole 120; First connecting hole 130;

[0039] Housing 20; Second sealing ring 201; Second screw 202; Elastic arm 210; Protruding buckle 211; Second connecting hole 220; First stepped hole 230; Limiting seat 240; External thread 250;

[0040] Cable guide body 30; male cable connector 301; first limiting ring 3011; second limiting ring 3012; plug 302; cable through hole 310; fracture crack 320; annular protrusion 330;

[0041] Clamp 40; Extrusion block 410; Bending part 411; Nut 50; Magnetic ring 60; Sealing cylinder 70. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of this utility model, the communication cover structure and inverter of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The communication cover structure provided by this utility model is applied to an inverter, which connects the cable to the inverter and forms a sealed assembly at the connection point between the cable and the inverter housing.

[0044] Combination Figure 2A As shown, a specific embodiment of the communication shield structure is illustrated. The communication shield structure of this utility model includes a base 10, a housing 20, and a cable threading body 30, combined with... Figure 1 As shown, the base 10 is fixedly installed on the inverter enclosure. Several components are installed inside the inverter enclosure, and several interfaces are reserved on the side wall of the inverter enclosure.

[0045] Combination Figure 2C , Figure 3C As shown, the base 10 is fixedly installed on the outer surface of the inverter enclosure. A first sealing ring 101 is provided between the base 10 and the outer surface of the inverter enclosure. The first sealing ring 101 is annular, so that the base 10 and the inverter enclosure form a sealed contact area, sealing the contact gap between the base 10 and the inverter enclosure to prevent moisture and dust from entering.

[0046] The base 10 is ring-shaped, and several cable interfaces are surrounded around the base 10. After the housing 20 is installed, the inverter box, the base 10, and the housing 20 form a sealed space, keeping the gaps between the interfaces and the inverter box sealed.

[0047] The housing 20 is snap-fitted onto the base 10, achieving a fixed fit between the housing 20 and the base 10 through a plug-in and snap-fit ​​connection. Figure 2C , Figure 3C As shown, a second sealing ring 201 is provided between the housing 20 and the base 10. When the housing 20 and the base 10 are fixedly connected, the gap between the housing 20 and the base 10 is sealed by the second sealing ring 201 to prevent moisture and dust from entering.

[0048] The second sealing ring 201 is annular, ensuring a complete sealing contact between the housing 20 and the base 10.

[0049] It should be noted that the first sealing ring 101 and the second sealing ring 201 can be independently set or integrated on the base 10 or the housing 20. Figure 2C In the structure shown, the first sealing ring 101 and the second sealing ring 201 are independently provided. An annular groove is provided on the bottom surface of the base 10 that contacts the inverter housing to accommodate the first sealing ring 101; an annular groove is provided on the side wall of the housing 20 that is inserted into the base 10 to accommodate the second sealing ring 201. Figure 3C In the structure shown, the first sealing ring 101 is integrated on the bottom surface of the base 10, and the second sealing ring 201 is integrated on the side wall of the housing 20.

[0050] The threading body 30 is sealed and assembled onto the housing 20. The threading body 30 has a cylindrical structure. An installation channel for inserting the threading body 30 is provided at the end of the housing 20 away from the base 10. The threading body 30 is inserted into the installation channel. The outer diameter of the threading body 30 is slightly larger than the diameter of the installation channel. The threading body 30 has a certain degree of elasticity. The insertion of the threading body 30 into the installation channel forms an interference fit, and the outer periphery of the threading body 30 forms a sealed contact with the installation channel. In the following text, the installation through hole is specifically the first-step hole 230.

[0051] The cable guide body 30 is provided with a cable passage hole 310 for the cable to pass through and form a sealed contact. The cable passage hole 310 is opened through the axial direction of the cable guide body 30. Each cable is inserted into a corresponding cable passage hole 310. The size of each cable passage hole 310 can be the same or different, and is set according to the cable diameter corresponding to each cable passage hole 310. The outer diameter of the cable is slightly larger than the inner diameter of the cable passage hole 310. The cable is inserted into the cable passage hole 310 to form an interference fit, and the outer periphery of the cable forms a sealed contact with the cable passage hole 310.

[0052] The sealing structure of this utility model adopts a three-stage sealing system, namely a first sealing ring 101, a second sealing ring 201, and a cable guide 30. The first sealing ring 101 secures the base 10 and the inverter housing to form a sealed fit; the second sealing ring 201 secures the housing 20 to the base 10; and the cable guide 30 ensures a sealed fit with both the housing 20 and the cable. Through these three sealing connections, the risk of water ingress into the inverter is reduced.

[0053] The housing 20 and the base 10 are connected by a snap-fit ​​mechanism, allowing for quick fixing and disassembly, facilitating rapid assembly and easy connection for customers. After the cable is connected to the interface on the inverter enclosure, the housing 20 is snapped onto the base 10, providing waterproof and dustproof protection for the cable interface.

[0054] Combination Figure 2A , Figure 3A As shown, elastic arms 210 are provided on opposite sides of the housing 20. The elastic arms 210 are cantilever structures, with one end fixed to the housing 20 and the other end suspended in the air. The elastic arms 210 can undergo elastic deformation.

[0055] The side wall of the elastic arm 210 is provided with a protruding buckle 211, which is a block-shaped protrusion protruding from the side wall of the elastic arm 210. Fixing blocks 110 are respectively provided on opposite sides of the base 10. The fixing blocks 110 are fixedly mounted on the base 10. The fixing blocks 110 are provided with locking holes 111 or locking grooves 112, and the protruding buckles 211 are used to engage with the locking holes 111 or locking grooves 112 for locking.

[0056] Combination Figure 2A , Figure 2C As shown, in the structure presented, a slot 112 is provided on the fixing block 110. The slot 112 is a groove opened on the fixing block 110, and the protrusion 211 can extend into the slot 112. The ends of the protrusion 211 and the slot 112 form a snap-fit ​​contact. The protrusion 211 is a wedge-shaped block. When the housing 20 is close to the base 10, the fixing block 110 squeezes the protrusion 211, causing the elastic arm 210 to elastically deform. The free ends of the two elastic arms 210 approach each other. After the protrusion 211 enters the slot 112, the elastic arm 210 rebounds, and the protrusion 211 cannot disengage from the slot 112 in the opposite direction. It is necessary to manually press the free ends of the two elastic arms 210 together to unlock it.

[0057] Combination Figure 3A , Figure 3C As shown, in the structure, a locking hole 111 is provided on the fixing block 110. The locking hole 111 is a channel for the elastic arm 210 to pass through. The protruding buckle 211 can extend into the locking hole 111, and the ends of the protruding buckle 211 and the locking hole 111 form a locking contact. The protruding buckle 211 is a wedge-shaped block. When the housing 20 is close to the base 10, the fixing block 110 squeezes the protruding buckle 211, causing the elastic arm 210 to elastically deform. The free ends of the two elastic arms 210 approach each other. After the protruding buckle 211 enters the locking hole 111, the elastic arm 210 rebounds, and the protruding buckle 211 cannot disengage from the locking hole 111 in the opposite direction. It is necessary to manually press the free ends of the two elastic arms 210 together to unlock them.

[0058] The base 10 is provided with several fixing holes 120 and at least one first connecting hole 130, such as Figure 2A , Figure 2B , Figure 3A , Figure 3BAs shown, four fixing holes 120 are provided at the four corners of the base 10. The fixing holes 120 are used for the first screw 102 to pass through. The first screw 102 is screwed into the inverter housing to achieve a relatively fixed connection between the base 10 and the inverter housing. Through the four first screws 102 at the four corners, it is ensured that the base 10 forms a uniform compression on the first sealing ring 101.

[0059] A second connecting hole 220 is provided on the housing 20, for connection Figure 2A , Figure 3A As shown, the second connecting hole 220 is located in the middle of one edge of the housing 20. The first connecting hole 130 and the second connecting hole 220 are used to cooperate for the second screw 202 to fix the connection. When the first connecting hole 130 and the second connecting hole 220 are aligned, the second screw 202 is screwed in to prevent the housing 20 from separating from the base 10. On the basis of the snap-fit ​​fixation between the housing 20 and the base 10, the second screw 202 further enhances the connection firmness.

[0060] Combination Figure 2A As shown, in this embodiment, the sidewall of the wire guide body 30 corresponding to each wire hole 310 is provided with a break 320. Each wire hole 310 has a break 320. When installing a cable, the cable can be inserted through the break 320 without having to insert the end of the cable into the wire hole 310, which facilitates cable installation.

[0061] Combination Figure 3A , Figure 3C As shown, the cable hole 310 is used to mate with the male cable connector 301 for installing cables. The wires inside the male cable connector 301 are connected to the inside of the inverter, and the male cable connector 301 serves as an interface for leading out from the inverter housing. The side wall of the male cable connector 301 is provided with a first limiting ring 3011 and a second limiting ring 3012, both of which are annular convex structures.

[0062] The wire passage hole 310 is a stepped hole with at least two different inner diameters. The larger diameter portion of the wire passage hole 310 is used to accommodate the first limiting ring 3011. The cylindrical portion of the cable male end 301 located between the first limiting ring 3011 and the second limiting ring 3012 is used to form a sealed contact with the wire guide body 30.

[0063] The cable passage 310 is optionally equipped with a plug 302, which can be made of silicone or rubber. The plug 302 is used to insert into the cable passage 310 where no cable is installed, and uses the plug 302 to replace the cable to ensure the sealing of the cable passage 310 reserved on the cable guide body 30 where no cable is installed.

[0064] Based on any of the above technical solutions and their combinations, the housing 20 of this utility model is provided with a first stepped hole 230. The first stepped hole 230 has two parts with different inner diameters, with the larger inner diameter section located at the end away from the base 10. The wire threader 30 and the clamp 40 are inserted into the larger inner diameter section of the first stepped hole 230.

[0065] Combination Figure 3C As shown, one end of the threading body 30 contacts the stepped surface of the first stepped hole 230, and the threading body 30 is fitted with a clamp 40. Specifically, a circumferentially protruding annular protrusion 330 is provided at the end of the threading body 30 that contacts the stepped surface. The bottom surface of the annular protrusion 330 contacts the stepped surface of the first stepped hole 230, and the top surface of the annular protrusion 330, which is opposite to the bottom surface, contacts the end of the clamp 40.

[0066] The housing 20 is provided with an external thread 250. The internal thread provided on the inner surface of the annular sidewall of the nut 50 forms a threaded connection with the external thread 250. When the nut 50 is tightened, the nut 50 presses the end of the clamp 40, so that the clamp 40 presses the cable guide 30 radially, ensuring that the cable guide 30 and the cable are tightly pressed together, thus improving the sealing performance.

[0067] Combination Figure 2A , Figure 3A As shown, a portion of the clamp 40 is exposed through the first stepped hole 230. Several compression blocks 410 are provided at one end of the clamp 40 exposed through the first stepped hole 230. Each compression block 410 has a cantilever structure, with one end fixed and the other end suspended. All compression blocks 410 are arranged circumferentially, allowing for elastic deformation. A radially contracting bend 411 is provided at the suspended end of the compression block 410, which can axially limit the movement of the threading body 30.

[0068] When the pressing block 410 is pressed by the nut 50, all the pressing blocks 410 converge and contract towards the central axis of the cable threading body 30, thereby clamping the cable threading body 30 and making the contact between the cable threading body 30 and the cable tighter.

[0069] Combination Figure 3C As shown, a limiting seat 240 is provided inside the housing 20. The limiting seat 240 is a protrusion structure protruding from the inner wall of the housing 20, and the limiting seat 240 protrudes towards the central axis of the housing 20. A magnetic ring 60 is installed between the limiting seat 240 and the wire guide 30, and the magnetic ring 60 is axially limited by the limiting seat 240.

[0070] Specifically, the limiting seat 240 is disposed in the smaller inner diameter section of the first stepped hole 230, the magnetic ring 60 is inserted into the smaller inner diameter section of the first stepped hole 230, and one end of the magnetic ring 60 is axially limited by the limiting seat 240; after the threading body 30 is inserted, the threading body 30 forms an axial limit on the other end of the magnetic ring 60.

[0071] The limiting seat 240 can be a structure formed by multiple spaced protrusions. Specifically, the limiting seat 240 has three or four protrusions and the magnetic ring 60 is abutted on the protrusions. Alternatively, the limiting seat 240 can be a complete ring and the magnetic ring 60 is abutted on the ring. Figure 2A In the structure shown, the limiting seat 240 is provided with four protrusion structures; Figure 3A In the structure shown, the limiting seat 240 is provided with three protrusion structures. Each protrusion structure is evenly distributed along the circumference of the limiting seat 240, thereby axially positioning the magnetic ring 60.

[0072] The magnetic ring 60 has a circular structure. The channel in the middle of the magnetic ring 60 is used for cable passage. The magnetic ring 60 is used for filtering to reduce strong and weak electrical interference. This utility model reserves space in the housing 20 to install the magnetic ring 60. The magnetic ring 60 can be placed in the housing 20, outside the inverter enclosure, which solves the problem that the internal space of the inverter cannot be optimized by the magnetic ring. Placing the magnetic ring inside the housing 20 improves the overall EMC (electromagnetic compatibility) performance of the unit.

[0073] Combination Figure 2A , Figure 2C As shown, a sealing cylinder 70 is fitted over the threading body 30. The sealing cylinder 70 is located inside the clamp 40. The sealing cylinder 70 is positioned between the threading body 30 and the clamp 40. The nut 50 presses against the clamp 40, the clamp 40 presses against the sealing cylinder 70, and the sealing cylinder 70 presses against the threading body 30.

[0074] This utility model also provides an inverter, including the above-mentioned communication cover structure, which can achieve the same technical effect.

[0075] This invention employs a three-stage sealing system to reduce the risk of water ingress into the inverter; it uses a snap-fit ​​quick-assembly structure for easy customer connection; and when the internal space of the inverter cannot be optimized through magnetic rings, components, or other means, a magnetic ring is placed inside the communication cover to improve the overall EMC performance.

[0076] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A communication shield structure, characterized in that, include: The base (10) is fixedly installed on the inverter housing, and a first sealing ring (101) is provided between the base (10) and the inverter housing. The housing (20) is snapped onto the base (10), and a second sealing ring (201) is provided between the housing (20) and the base (10). The cable guide (30) is sealed and assembled on the housing (20), and has a cable through hole (310) for the cable to pass through and form a sealed contact.

2. The communication shield structure according to claim 1, characterized in that, Elastic arms (210) are provided on opposite sides of the housing (20), one end of the elastic arm (210) is fixed to the housing (20) and the other end is suspended; the side wall of the elastic arm (210) is provided with a protruding buckle (211). The base (10) is provided with fixing blocks (110) on opposite sides, and the fixing blocks (110) are provided with card holes (111) or card slots (112). The protruding buckle (211) is used to engage with the card hole (111) or the card slot (112) for locking.

3. The communication shield structure according to claim 1, characterized in that, The base (10) is provided with a plurality of fixing holes (120) and at least one first connecting hole (130), the fixing holes (120) being used for the first screw (102) to pass through and be fixed to the inverter housing; The housing (20) is provided with a second connecting hole (220), and the first connecting hole (130) and the second connecting hole (220) are used to cooperate for the second screw (202) to fix the connection.

4. The communication shield structure according to claim 1, characterized in that, Each of the wire holes (310) has a break crack (320) on the side wall of the wire threading body (30).

5. The communication shield structure according to claim 1, characterized in that, The cable hole (310) is used to fit the male cable connector (301) for installing the cable. The side wall of the male cable connector (301) is provided with a first limiting ring (3011) and a second limiting ring (3012). The wire hole (310) is a stepped hole, and the larger diameter of the hole is used to accommodate the first limiting ring (3011). The cable passage (310) is optionally equipped with a plug (302), which is used to insert into the cable passage (310) when no cable is installed.

6. The communication shield structure according to any one of claims 1 to 5, characterized in that, The housing (20) is provided with a first stepped hole (230), in which the threading body (30) and the clamp (40) are inserted. One end of the threading body (30) contacts the stepped surface of the first stepped hole (230), and the clamp (40) is fitted over the threading body (30). The housing (20) is provided with external threads, and the nut (50) is connected to the external threads and squeezes the clamp (40) to press the threading body (30) radially.

7. The communication cover structure according to claim 6, characterized in that, The clamp (40) is provided with a plurality of compression blocks (410) at one end exposed in the first stepped hole (230), and the end of the compression block (410) is provided with a radially contracting bent portion (411).

8. The communication shield structure according to claim 6, characterized in that, A limiting seat (240) is provided inside the housing (20), and a magnetic ring (60) is installed between the limiting seat (240) and the cable threading body (30); the magnetic ring (60) is used for the cable to pass through; The limiting seat (240) is a structure of protrusions distributed at intervals, or the limiting seat (240) is a complete ring.

9. The communication shield structure according to claim 6, characterized in that, The threading body (30) is fitted with a sealing cylinder (70), which is located inside the clamp (40).

10. An inverter, characterized in that, Includes the communication shield structure as described in any one of claims 1 to 9.

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