Home Energy Manager

Abstract

This utility model belongs to the technical field of low-voltage electrical equipment and discloses a home energy manager. The home energy manager includes a housing, with a first receiving cavity, a second receiving cavity, and a third receiving cavity sequentially connected along a first direction. A first circuit board is disposed in the first receiving cavity. The second receiving cavity has several first openings, a snap-fit ​​assembly, and several first limiting parts. The end faces of the several first limiting parts are at the same height. The surface of the second circuit board abuts against the end faces of the several first limiting parts, and the first interface is aligned with the first opening. The snap-fit ​​assembly engages with the second circuit board. The third circuit board is disposed in the third receiving cavity. This utility model reduces assembly costs and ensures that the first interface on the second circuit board is aligned with the corresponding opening on the housing.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical equipment technology, and in particular to a home energy manager. Background Technology

[0002] A home energy manager is a device that supports solar power, energy storage, smart charging, and smart electricity usage. Homes can utilize solar energy to generate electricity by installing photovoltaic (PV) panels. These panels convert solar energy into electricity, providing a green and renewable energy source for the home. The PV power generation system can connect to the home energy manager for real-time monitoring and data analysis. Users can view information such as PV power generation, electricity consumption, and the charging and discharging status of the energy storage battery through the terminal. The smart energy storage system connects to the home energy manager to store excess electricity generated by PV power generation. The home energy manager can monitor the home's energy consumption in real time, including PV power generation, electricity consumption, and the charging and discharging status of the energy storage battery. Through data analysis, the home energy manager can provide users with energy usage suggestions to help optimize energy consumption and reduce energy costs.

[0003] The home energy manager's housing contains a first circuit board, a second circuit board, and a third circuit board. The second circuit board requires multiple screws for fixing, which is not only time-consuming and labor-intensive, increasing assembly costs, but also, because the second circuit board has multiple first interfaces, when the screws are turned to different depths, it is easy to cause multiple first interfaces to not be fully aligned with the multiple openings on the housing. Utility Model Content

[0004] The purpose of this invention is to provide a home energy manager that reduces assembly costs and ensures that the first interface on the communication board is aligned with the corresponding opening on the housing.

[0005] To achieve this objective, the present invention adopts the following technical solution: A home energy manager includes a first circuit board, a second circuit board, and a third circuit board. The second and third circuit boards are both electrically connected to the first circuit board. The second circuit board has several first interfaces. The home energy manager also includes: The cover has a first receiving cavity, a second receiving cavity, and a third receiving cavity connected sequentially along a first direction. The first circuit board is disposed in the first receiving cavity. The cavity wall of the second receiving cavity has a plurality of first openings. The second receiving cavity is provided with a snap-fit ​​assembly and a first limiting part. The first limiting part supports the second circuit board in the second receiving cavity in a first direction and makes the first interface correspond one-to-one with the first opening. The snap-fit ​​assembly snaps into the second circuit board. The third circuit board is disposed in the third receiving cavity.

[0006] As an optional solution for a home energy manager, the latching assembly includes a resilient latch and a fixed latch. The resilient latch and the fixed latch are disposed on opposite side walls of the second receiving cavity along a second direction. The fixed latch is connected to the inner side wall of the second receiving cavity. The two ends of the second circuit board are respectively latched with the resilient latch and the fixed latch.

[0007] As an optional solution for a home energy manager, the elastic buckle includes an elastic snap-fit ​​plate and a snap-fit ​​block. One end of the elastic snap-fit ​​plate is connected to the inner wall of the second receiving cavity, and the other end of the elastic snap-fit ​​plate is provided with the snap-fit ​​block. The snap-fit ​​block is disposed opposite to the fixed buckle. The first surface of the second circuit board stops at the first limiting part, and the second surface of the second circuit board stops at the snap-fit ​​block and the fixed buckle.

[0008] As an optional solution for a home energy manager, the second circuit board has a notch at its edge, the elastic snap-fit ​​plate snaps into the notch, and the snap-fit ​​block presses against the second surface of the second circuit board.

[0009] As an optional solution for a home energy manager, the second receiving cavity has second limiting portions on two opposing side walls facing upwards. Each second limiting portion has a wedge-shaped surface, and the second circuit board is secured between the two opposing second limiting portions; and / or The first receiving cavity has a third limiting part on each of its two opposing side walls. The third limiting part has a wedge-shaped surface, and the first circuit board is engaged between the third limiting parts on the two opposing side walls; and / or The bottom wall of the first accommodating cavity is provided with a plurality of fourth limiting parts, the end faces of the plurality of fourth limiting parts are at the same height, and the surface of the first circuit board abuts against the end faces of the plurality of fourth limiting parts.

[0010] As an optional solution for a home energy manager, the first circuit board, the second circuit board, and the third circuit board are arranged and assembled in parallel in sequence.

[0011] As an optional solution for a home energy manager, it also includes a base that engages with the housing. The base has two opposing sidewalls along a third direction with electrostatic walls that extend into the third receiving cavity along a first direction. The third circuit board is located between the two electrostatic walls.

[0012] As an optional solution for a home energy manager, each of the electrostatic walls has a fifth limiting part on its inner wall surface, the fifth limiting part having a wedge-shaped surface, and the third circuit board is engaged between the fifth limiting parts of two opposing electrostatic walls.

[0013] As an optional solution for a home energy manager, the third circuit board is provided with a second interface, the cavity wall of the third receiving cavity is provided with a second opening, the bottom wall of the base is provided with a plurality of sixth limiting parts, the end faces of the plurality of sixth limiting parts are at the same height, the first plate surface of the third circuit board abuts against the end faces of the plurality of sixth limiting parts, and the second interface is configured to correspond one-to-one with the second opening; and / or The bottom wall of the third accommodating cavity is provided with a plurality of seventh limiting parts, the stepped surfaces of the plurality of seventh limiting parts are of the same height, the second plate surface of the third circuit board abuts against the end surfaces of the plurality of seventh limiting parts, and the second interface is configured to correspond to the second opening.

[0014] As an optional solution for a home energy manager, the edge of the opening of the cover is provided with a first snap-fit ​​part, and the base is provided with a corresponding second snap-fit ​​part, and the first snap-fit ​​part snaps into the second snap-fit ​​part.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The home energy manager provided by this utility model installs a first circuit board, a second circuit board, and a third circuit board into the first, second, and third receiving cavities of the housing, respectively. The second receiving cavity is equipped with a snap-fit ​​assembly, allowing the second circuit board to be fixed in position by snap-fit, eliminating the need for bolts, thus reducing assembly difficulty and improving assembly efficiency. The second receiving cavity is provided with multiple first limiting parts. After the second circuit board is installed in the second receiving cavity, the first limiting parts support the second circuit board in a first direction within the second receiving cavity, ensuring the second circuit board is in a horizontal installation state. This guarantees that the first interface on the second circuit board aligns with the corresponding first opening on the housing, improving the installation accuracy of the second circuit board. Attached Figure Description

[0016] Figure 1 This is an assembly diagram of the home energy manager in an embodiment of this utility model; Figure 2 This is an exploded view of the home energy manager in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the home energy manager in an embodiment of this utility model; Figure 4 This is a structural schematic diagram of the cover from a first-view perspective in an embodiment of this utility model; Figure 5 This is a structural schematic diagram of the cover from a second perspective in an embodiment of this utility model; Figure 6 This is a structural schematic diagram of the cover from a third-view perspective in an embodiment of this utility model; Figure 7This is a schematic diagram of the base structure in an embodiment of this utility model.

[0017] In the picture: 1. First circuit board; 2. Second circuit board; 21. First interface; 22. Notch; 3. Third circuit board; 31. Second interface; 4. Cover; 5. Base; 41. First receiving cavity; 411. Third limiting part; 412. Fourth limiting part; 42. Second receiving cavity; 421. First opening; 422. First limiting part; 423. Elastic buckle; 4231. Elastic locking plate; 4232. Locking block; 424. Fixed buckle; 425. Second limiting part; 43. Third receiving cavity; 431. Second opening; 432. First locking part; 433. Seventh limiting part; 51. Static electricity wall; 52. Fifth limiting part; 53. Sixth limiting part; 54. Second locking part. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] To enable the second circuit board to be fixed without bolts, and to ensure that the first interface on the second circuit board aligns perfectly with the corresponding opening on the housing, this embodiment provides a home energy manager, which is described below in conjunction with... Figures 1 to 7 The specific content of this embodiment will be described in detail. It should be noted that the first direction mentioned in this embodiment is... Figure 1 The Z-direction and height direction, the second direction mentioned in this embodiment is Figure 1 The Y direction and the front-back direction are mentioned in this embodiment. The third direction mentioned in this embodiment is... Figure 1 The X-direction and left and right directions are mentioned. For example, in this embodiment, the first circuit board 1 can be a main control board, the second circuit board 2 can be a communication board, and the third circuit board 3 can be a power supply board.

[0023] The home energy manager in this embodiment includes a first circuit board 1, a second circuit board 2, and a third circuit board 3. The second circuit board 2 and the third circuit board 3 are both electrically connected to the first circuit board 1. The second circuit board 2 has several first interfaces 21. The home energy manager also includes a housing 4. The housing 4 has a first receiving cavity 41, a second receiving cavity 42, and a third receiving cavity 43 connected sequentially along a first direction. The first circuit board 1 is located within the first receiving cavity 41, and the third circuit board 3 is located within the third receiving cavity 43. The cavity wall of the second receiving cavity 42 has several first openings 421. The second receiving cavity 42 has a latching assembly and several first limiting parts 422. The end faces of the several first limiting parts 422 are at the same height. The first limiting parts 422 support the second circuit board 2 within the second receiving cavity 42 in a first direction. The surface of the second circuit board 2 abuts against the end faces of the several first limiting parts 422, and the first interfaces 21 correspond one-to-one with the first openings 421. The latching assembly engages with the second circuit board 2.

[0024] The home energy manager provided by this utility model installs a first circuit board 1, a second circuit board 2, and a third circuit board 3 into the first receiving cavity 41, the second receiving cavity 42, and the third receiving cavity 43 of the housing 4, respectively. The first circuit board 1, the second circuit board 2, and the third circuit board 3 are installed from top to bottom based on the housing, replacing the traditional hardware stacking scheme on a guide rail. The second receiving cavity 42 is provided with a snap-fit ​​assembly, and the second circuit board 2 is fixed to the second receiving cavity 42 by snap-fit, eliminating the need for bolts, reducing assembly costs and difficulty, and improving assembly efficiency. The second receiving cavity 42 is provided with multiple first limiting parts 422. After the second circuit board 2 is installed into the second receiving cavity 42, the first limiting parts 422 support the second circuit board 2 in a first direction within the second receiving cavity 42, ensuring that the second circuit board 2 is in a horizontal installation state. This ensures that the first interface 21 on the second circuit board 2 is aligned with the corresponding first opening 421 on the housing 4, improving the installation accuracy of the second circuit board 2.

[0025] For example, the multiple first interfaces 21 on the second circuit board 2 include, but are not limited to, SIM card slots, LAN interfaces, WAN interfaces, and 485 communication interfaces, etc., without further limitation. In this embodiment, the cross-sectional areas of the three circuit boards 1, 2, and 3 inside the housing 4 are different, and the cross-sectional areas of the first receiving cavity 41, the second receiving cavity 42, and the third receiving cavity 43 increase sequentially. By adopting a top-down mounting method based on the cover instead of laying multiple circuit boards flat, the overall installation volume of the housing can be reduced.

[0026] Furthermore, the latching assembly includes a resilient latch 423 and a fixed latch 424, which are disposed on opposite sides of the second receiving cavity 42 along the second direction. The fixed latch 424 is connected to the inner wall of the second receiving cavity 42, and both ends of the second circuit board 2 are respectively latched with the resilient latch 423 and the fixed latch 424. The fixed latch 424 is directly and seamlessly connected to the inner wall of the second receiving cavity 42, providing a solid support foundation for the entire latching assembly. The resilient latch 423, corresponding to the fixed latch 424, is made of a material with good elasticity and can deform within a certain range to adapt to the second circuit board 2 of different sizes or installation positions. In practical applications, both ends of the second circuit board 2 are guided to the latching areas of the resilient latch 423 and the fixed latch 424. After one end of the second circuit board 2 is initially positioned with the fixing clip 424, the other end is gently pressed or slid to cause the elastic clip 423 to deform slightly under force, thereby tightly wrapping and fixing the other end of the second circuit board 2. This design not only ensures the stable installation of the second circuit board 2 within the second receiving cavity 42, effectively preventing loosening or detachment due to vibration or external force, but also greatly facilitates subsequent maintenance and replacement. When it is necessary to disassemble or replace the second circuit board 2, simply press the release part of the elastic clip 423 to easily release the latch, enabling quick disassembly and installation of the second circuit board 2.

[0027] Furthermore, the elastic buckle 423 includes an elastic snap-fit ​​plate 4231 and a snap-fit ​​block 4232. One end of the elastic snap-fit ​​plate 4231 is connected to the inner wall of the second receiving cavity 42, and the other end of the elastic snap-fit ​​plate 4231 is provided with a snap-fit ​​block 4232. The snap-fit ​​block 4232 is disposed opposite to the fixing buckle 424. The first surface of the second circuit board 2 is stopped by the first limiting part 422, and the second surface of the second circuit board 2 is stopped by the snap-fit ​​block 4232 and the fixing buckle 424. The second circuit board 2 is fixed in the second receiving cavity 42 of the cover 4 by the cooperation of the snap-fit ​​block 4232, the fixing buckle 424 and the first limiting part 422. For example, the cover 4 can be made of plastic material.

[0028] Furthermore, the edge of the second circuit board 2 is provided with a notch 22, which is concave. The elastic snap-fit ​​plate 4231 is inserted into the notch 22, and the snap-fit ​​block 4232 presses against the second surface of the second circuit board 2. By creating the notch 22 on the second circuit board 2, when the elastic snap-fit ​​plate 4231 of the elastic buckle 423 is inserted into the notch 22, it helps to increase the depth of the elastic snap-fit ​​plate 4231 inserted into the second circuit board 2, thereby increasing the stability of the connection between the elastic buckle 423 and the second circuit board 2.

[0029] For example, the second receiving cavity 42 has two opposing second limiting portions 425 on its two side walls facing the third direction. Each second limiting portion 425 has a wedge-shaped surface, and the second circuit board 2 is engaged between the two opposing second limiting portions 425. By adding second limiting portions 425 with wedge-shaped surfaces on the left and right sides of the second receiving cavity 42, the wedge-shaped surfaces can guide the second circuit board 2 into the second receiving cavity 42, and the second circuit board 2 is interference-fitted with the two second limiting portions 425. The second limiting portions 425 located on the left and right sides can restrict the movement of the second circuit board 2 in the left-right direction.

[0030] For example, the first receiving cavity 41 has two opposing sidewalls each provided with a third limiting part 411, and the third limiting part 411 has a wedge-shaped surface. The first circuit board 1 is engaged between the third limiting parts 411 on the two opposing sidewalls. By adding third limiting parts 411 with wedge-shaped surfaces on the left and right sides of the first receiving cavity 41, the wedge-shaped surfaces can guide the first circuit board 1 into the first receiving cavity 41, and the first circuit board 1 is interference-fitted with the two third limiting parts 411. The third limiting parts 411 located on the left and right sides can restrict the movement of the first circuit board 1 in the left and right directions.

[0031] Furthermore, the bottom wall of the first receiving cavity 41 is provided with a plurality of fourth limiting portions 412, the end faces of which are at the same height, and the surface of the first circuit board 1 abuts against the end faces of the plurality of fourth limiting portions 412. After the first circuit board 1 is installed into the first receiving cavity 41, by ensuring that the end faces of the plurality of fourth limiting portions 412 are at the same height, the first circuit board 1 is ensured to be installed horizontally, thereby improving the installation accuracy of the first circuit board 1. The third limiting portion 411 and the fourth limiting portion 412 cooperate to fix the position of the first circuit board 1.

[0032] Optionally, the first circuit board 1, the second circuit board 2, and the third circuit board 3 are arranged and assembled in parallel. The housing 4 serves as the protective and supporting structure for the core components. Inside the housing 4, the three key components—the first circuit board 1, the second circuit board 2, and the third circuit board 3—are arranged in an orderly and compact manner, parallel to each other in the same direction. This maximizes space utilization and facilitates signal transmission and power supply between modules. The first circuit board 1, as the "brain" of the entire home energy management system, undertakes core tasks such as data processing, logical judgment, and command issuance. Its location balances heat dissipation performance and convenient signal transmission. Following closely behind, the second circuit board 2 acts as a bridge for information exchange between devices. It is responsible for accurately transmitting the commands from the first circuit board 1 to each terminal device and receiving updates from the external network. Its parallel arrangement to the first circuit board 1 effectively shortens the signal transmission path and improves communication efficiency. The third circuit board 3, located at the end of this sequence, is the power source of the entire system. It not only provides stable and reliable power support for the first two circuit boards, but also integrates multiple safety mechanisms such as power management and overload protection to ensure the long-term stable operation of the home energy manager. The parallel layout of the third circuit board 3 with the first circuit board 1 and the second circuit board 2 not only optimizes the power distribution network and reduces energy loss, but also facilitates the overall heat dissipation design, effectively extending the service life of the equipment.

[0033] Furthermore, the home energy manager also includes a base 5, which engages with the housing 4. The base 5 seals the third receiving cavity 43, preventing the first circuit board 1, the second circuit board 2, and the third circuit board 3 from falling out of the housing 4. The base 5 has two opposing anti-static walls 51 along its third direction, extending into the third receiving cavity 43. The third circuit board 3 is located between the two anti-static walls 51. By increasing the height of the anti-static walls 51, they can effectively block the seams between the base 5 and the housing 4, thus providing the home energy manager with effective anti-static electrical properties.

[0034] Furthermore, each electrostatic wall 51 has a fifth limiting part 52 on its inner wall surface. The fifth limiting part 52 has a wedge-shaped surface, and the third circuit board 3 is engaged between the fifth limiting parts 52 of the two opposing electrostatic walls 51. The electrostatic walls 51 on the left and right sides are additionally provided with fifth limiting parts 52 with wedge-shaped surfaces. The wedge-shaped surfaces can guide the third circuit board 3 to engage, and the third circuit board 3 is interference-fitted with the fifth limiting parts 52 on both sides. The fifth limiting parts 52 on the left and right sides can restrict the movement of the third circuit board 3 in the left and right directions.

[0035] Optionally, the third circuit board 3 is provided with a plurality of second interfaces 31, the cavity wall of the third receiving cavity 43 is provided with a plurality of second openings 431, and the bottom wall of the base 5 is provided with a plurality of sixth limiting parts 53. The end faces of the plurality of sixth limiting parts 53 are at the same height. The first plate surface of the third circuit board 3 abuts against the end faces of the plurality of sixth limiting parts 53, and the second interfaces 31 are correspondingly set with the second openings 431; and / or the bottom wall of the third receiving cavity 43 is provided with a plurality of seventh limiting parts 433. The step surfaces of the plurality of seventh limiting parts 433 are at the same height. The second plate surface of the third circuit board 3 abuts against the step surfaces of the plurality of seventh limiting parts 433, and the second interfaces 31 are correspondingly set with the second openings 431. After the third circuit board 3 is installed into the third receiving cavity 43, by making the end faces of the plurality of sixth limiting parts 53 at the same height, the third circuit board 3 is in a horizontal installation state, ensuring that the second interfaces 31 on the third circuit board 3 are aligned with the corresponding second openings 431 on the cover 4, thereby improving the installation accuracy of the third circuit board 3. The stepped surfaces of the multiple seventh limiting parts 433 are at the same height. After the second plate surface of the third circuit board 3 abuts against the stepped surface of the seventh limiting part 433, it further ensures that the third circuit board 3 is in a horizontal installation state. It can be understood that in this embodiment, the position of the third circuit board 3 can be fixed by the fifth limiting part 52, the sixth limiting part 53 and the seventh limiting part 433, and the third circuit board 3 can be positioned in different directions.

[0036] For example, the multiple second interfaces 31 on the third circuit board 3 include, but are not limited to, digital and analog signal input / output interfaces, 220V AC interfaces and 12V DC interfaces, etc., without further restrictions.

[0037] For example, each edge of the opening of the cover 4 is provided with a first snap-fit ​​portion 432, and the base 5 is provided with a corresponding second snap-fit ​​portion 54. The first snap-fit ​​portion 432 and the second snap-fit ​​portion 54 snap-fit ​​together. In this embodiment, the connection between the first snap-fit ​​portion 432 at the four corners and the corresponding four second snap-fit ​​portions 54 can ensure the firmness of the connection between the cover 4 and the base 5.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A home energy manager, comprising a first circuit board (1), a second circuit board (2), and a third circuit board (3), wherein the second circuit board (2) and the third circuit board (3) are electrically connected to the first circuit board (1), and the second circuit board (2) is provided with a plurality of first interfaces (21), characterized in that, The home energy manager also includes: The cover (4) has a first receiving cavity (41), a second receiving cavity (42) and a third receiving cavity (43) connected in sequence along a first direction. The first circuit board (1) is disposed in the first receiving cavity (41). The cavity wall of the second receiving cavity (42) is provided with a first opening (421). The second receiving cavity (42) is provided with a buckle assembly and a first limiting part (422). The first limiting part (422) supports the second circuit board (2) in the second receiving cavity (42) in the first direction and makes the first interface (21) correspond to the first opening (421). The buckle assembly is engaged with the second circuit board (2). The third circuit board (3) is disposed in the third receiving cavity (43).

2. The home energy manager according to claim 1, characterized in that, The latching assembly includes an elastic latch (423) and a fixed latch (424). The elastic latch (423) and the fixed latch (424) are disposed on opposite sides of the second receiving cavity (42) along the second direction. The fixed latch (424) is connected to the inner wall of the second receiving cavity (42). The two ends of the second circuit board (2) are respectively latched to the elastic latch (423) and the fixed latch (424).

3. The home energy manager according to claim 2, characterized in that, The elastic buckle (423) includes an elastic snap plate (4231) and a snap block (4232). One end of the elastic snap plate (4231) is connected to the inner wall of the second receiving cavity (42), and the other end of the elastic snap plate (4231) is provided with the snap block (4232). The snap block (4232) is disposed opposite to the fixed buckle (424). The first plate surface of the second circuit board (2) stops at the first limiting part (422), and the second plate surface of the second circuit board (2) stops at the snap block (4232) and the fixed buckle (424).

4. The home energy manager according to claim 3, characterized in that, The edge of the second circuit board (2) is provided with a notch (22), the elastic snap plate (4231) is snapped into the notch (22), and the snap block (4232) is pressed against the second plate surface of the second circuit board (2).

5. The home energy manager according to claim 2, characterized in that, The second receiving cavity (42) has two opposing second limiting portions (425) on its two side walls facing each other in the third direction. The second limiting portions (425) have wedge-shaped surfaces. The second circuit board (2) is engaged between the two opposing second limiting portions (425); and / or The first receiving cavity (41) has a third limiting part (411) on each of its two opposite side walls. The third limiting part (411) has a wedge-shaped surface. The first circuit board (1) is engaged between the third limiting parts (411) on the two opposite side walls; and / or The bottom wall of the first receiving cavity (41) is provided with a plurality of fourth limiting parts (412), the end faces of the plurality of fourth limiting parts (412) are at the same height, and the board surface of the first circuit board (1) abuts against the end faces of the plurality of fourth limiting parts (412).

6. The home energy manager according to any one of claims 1-5, characterized in that, The first circuit board (1), the second circuit board (2), and the third circuit board (3) are arranged and assembled in parallel in sequence.

7. The home energy manager according to claim 1, characterized in that, It also includes a base (5), which is engaged with the cover (4). The base (5) has two opposing side walls along the third direction respectively provided with electrostatic walls (51). The electrostatic walls (51) extend along the first direction into the third receiving cavity (43). The third circuit board (3) is located between the two electrostatic walls (51).

8. The home energy manager according to claim 7, characterized in that, Each of the electrostatic walls (51) has a fifth limiting part (52) on its inner wall surface. The fifth limiting part (52) has a wedge-shaped surface. The third circuit board (3) is engaged between the fifth limiting parts (52) of the two opposing electrostatic walls (51).

9. The home energy manager according to claim 7, characterized in that, The third circuit board (3) is provided with a second interface (31), the cavity wall of the third receiving cavity (43) is provided with a second opening (431), the bottom wall of the base (5) is provided with a plurality of sixth limiting parts (53), the end faces of the plurality of sixth limiting parts (53) are at the same height, the first plate surface of the third circuit board (3) abuts against the end faces of the plurality of sixth limiting parts (53), and the second interface (31) is correspondingly set with the second opening (431); and / or The bottom wall of the third accommodating cavity (43) is provided with a plurality of seventh limiting parts (433), and the step surface height of the plurality of seventh limiting parts (433) is the same. The second plate surface of the third circuit board (3) abuts against the step surface of the plurality of seventh limiting parts (433), and the second interface (31) is correspondingly set with the second opening (431).

10. The home energy manager according to claim 7, characterized in that, The cover (4) has a first snap-fit ​​part (432) at the edge of the opening, and the base (5) has a corresponding second snap-fit ​​part (54). The first snap-fit ​​part (432) and the second snap-fit ​​part (54) snap-fit ​​together.

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