Electric energy meter

Abstract

The utility model provides an electric energy meter, relates to the technical field of instruments and meters, and aims to reduce the arc discharge problem between a piezoresistor and a conducting bar. The electric energy meter provided by the embodiment of the utility model comprises a piezoresistor, a relay and an insulating partition plate, and the piezoresistor is used for protecting a circuit where the electric energy meter is located; the relay comprises a conducting bar, and the conducting bar is arranged on one side of the piezoresistor; the insulating partition plate is arranged between the piezoresistor and the conducting bar and used for limiting the distance between the conducting bar and the piezoresistor. According to the application, the insulating partition plate is arranged between the piezoresistor and the conducting bar, so that the distance of the thickness of at least one insulating partition plate can be kept between the piezoresistor and the conducting bar, and the electrical gap and the creepage distance between the conducting bar and the piezoresistor are always kept in a qualified range; the arc discharge problem in the use process of the electric energy meter is reduced, and the performance stability and the use safety of the electric energy meter are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of instruments and meters, and in particular, to an electric energy meter. Background Art

[0002] Single-phase electronic energy meter, referred to as energy meter, is mainly composed of housing, relay, sampling element, voltage protection element, PCB board measurement mechanism, etc. In order to ensure the safety and reliability of the energy meter, there are strict requirements on the electrical clearance and creepage distance between the conductive elements in the energy meter housing. However, due to the small structure of the energy meter housing and the large number of internal components, the above requirements bring great challenges to the design of the energy meter.

[0003] Take the varistor as an example. As a commonly used voltage protection component in the electric energy meter, the varistor is usually installed adjacent to the conductive bar of the relay when used in the electric energy meter. Although the distance between the conductive bar and the varistor is strictly controlled when assembling the electric energy meter, arcing and sparking problems may still occur between the varistor and the conductive bar during use, and even the PCB board inside the electric energy meter may short-circuit and burn.

[0004] Therefore, how to reduce the arcing problem between the varistor and the conductive bar of the relay has become a major problem in the design process of the electric energy meter. Utility Model Content

[0005] In view of the above problems, an embodiment of the present application provides an electric energy meter, which can reduce the arcing problem between the varistor and the conductive bar, and improve the performance stability and safety of the electric energy meter.

[0006] The electric energy meter provided in the embodiment of the present application includes a varistor, a relay and an insulating partition, wherein the varistor is used to protect the circuit in which the electric energy meter is located; the relay includes a conductive bus, which is arranged on one side of the varistor; the insulating partition is arranged between the varistor and the conductive bus, and is used to limit the distance between the conductive bus and the varistor.

[0007] By adopting the above scheme, the insulating partition is arranged between the varistor and the conductive bar, so that the distance between the varistor and the conductive bar can be maintained at least the thickness of the insulating partition, so that the electrical clearance and creepage distance between the conductive bar and the varistor are always maintained within the qualified range, reducing the occurrence of arcing problems during the use of the electric energy meter and improving the performance stability and use safety of the electric energy meter.

[0008] In some embodiments, the conductive bar and the varistor are arranged opposite to each other in a first direction, and in the first direction, the orthographic projection of the insulating partition completely covers the orthographic projection of the conductive bar.

[0009] By adopting the above scheme, in the area directly facing the varistor and the conductive bar, there are insulating partitions to block them, so that charged particles cannot flow between the conductive bar and the varistor along the first direction, that is, the creepage distance between the conductive bar and the varistor is increased, and the electric energy meter is not prone to arcing problems during use. The performance of the electric energy meter is more stable and the use is safer.

[0010] In some embodiments, the conductive bar and the varistor are arranged opposite to each other in a first direction, and in the first direction, the orthographic projection of the insulating partition completely covers the orthographic projection of the varistor.

[0011] By adopting the above scheme, in the area directly facing the varistor and the conductive bar, there are insulating partitions to block them, so that charged particles cannot flow between the conductive bar and the varistor along the first direction, that is, the creepage distance between the conductive bar and the varistor is increased, and the electric energy meter is not prone to arcing problems during use. The performance of the electric energy meter is more stable and the use is safer.

[0012] In some embodiments, the conductive row and the varistor are arranged relative to each other in a first direction, and in the first direction, the orthographic projection of the insulating partition completely covers the orthographic projection of the conductive row, and the orthographic projection of the insulating partition completely covers the orthographic projection of the varistor.

[0013] By adopting the above scheme, in the area directly facing the varistor and the conductive bar, there are insulating partitions to block them, so that charged particles cannot flow between the conductive bar and the varistor along the first direction, and the charged particles cannot flow between the conductive bar and the varistor along other straight directions, but must take a curved route along the edge of the insulating partition and bypass the insulating partition to flow. Therefore, the creepage distance between the conductive bar and the varistor is increased, and the creepage line is more complicated, which further reduces the probability of arcing problems, making the performance of the electric energy meter more stable and safer to use.

[0014] In some embodiments, the thickness of the insulating spacer is greater than or equal to 5.5 mm.

[0015] By adopting the above solution, a safe distance of at least 5.5 mm can be maintained between the varistor and the conductive bar, thereby reducing the risk of short circuit between the varistor and the conductive bar.

[0016] In some embodiments, the electric energy meter also includes a shell, an insulating partition is connected to the bottom wall of the shell, a first reinforcing rib is provided on the side of the insulating partition close to the varistor, one end of the first reinforcing rib along the length direction is connected to the insulating partition, and the other end is connected to the side wall of the shell.

[0017] By adopting the above solution, the first reinforcing rib plays a role in supporting the insulating partition, thereby preventing the insulating partition from being deformed or broken due to impact during use.

[0018] In some embodiments, the thickness of the first reinforcing rib is set to A, the thickness of the side wall connected to the first reinforcing rib is set to B, and A≥0.5B.

[0019] By adopting the above solution, the thickness of the first reinforcement rib is at least 0.5 times the thickness of the side wall, which not only makes the connection strength between the first reinforcement rib and the side wall of the shell higher and prevents the two from being disconnected or deformed, but also makes the first reinforcement rib itself have higher strength and can provide stable support for the insulating partition.

[0020] In some embodiments, the thickness A of the first reinforcing rib and the thickness B of the side wall also satisfy: A≤0.8B.

[0021] When the above conditions are met, when manufacturing the shell, the cooling shrinkage of the first reinforcement rib leaves little or no trace on the side wall of the shell, the side wall has high flatness and aesthetics, and the shape change of the shell has little effect on the layout of components inside the shell.

[0022] In some embodiments, a second reinforcing rib is provided on one side of the insulating partition close to the conductive bar, and the second reinforcing rib is connected to the bottom wall of the shell.

[0023] By adopting the above solution, the second reinforcing rib plays a role of supporting the insulating partition from the other side of the insulating partition, further preventing the insulating partition from being deformed or broken due to impact during use.

[0024] In some embodiments, the second reinforcement rib contacts the relay.

[0025] By adopting the above solution, the second reinforcing rib can not only support the insulating partition but also reduce the shaking of the relay by contacting with the relay, thereby preventing the internal components of the relay from shifting during the shaking of the relay, causing the relay to fail to open or close.

[0026] To summarize, the electric energy meter provided in the embodiment of the present application arranges an insulating partition between the varistor and the conductive bar, so that the distance between the varistor and the conductive bar can be maintained at least the thickness of the insulating partition, thereby ensuring that the electrical clearance and creepage distance between the conductive bar and the varistor are always maintained within a qualified range, thereby reducing the occurrence of arcing problems during the use of the electric energy meter and improving the performance stability and safety of use of the electric energy meter.

[0027] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the internal structure of an electric energy meter provided in an embodiment of the present application.

[0030] Figure 2 A schematic diagram of the internal structure of an electric energy meter provided in an embodiment of the present application with the PCB board removed.

[0031] Figure 3 A schematic structural diagram of a casing of an electric energy meter provided in an embodiment of the present application.

[0032] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the CC surface.

[0033] Explanation of the reference numerals: 100, relay; 200, conductive bar; 300, varistor; 400, insulating partition; 500, housing; 510, bottom wall; 520, side wall; 600, first reinforcing rib; 700, second reinforcing rib; 800, PCB board; X, first direction. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0036] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the electric energy meter of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, the expressions of the indicating directions such as the X direction, the Y direction and the Z direction used to illustrate the operation and construction of the components of the electric energy meter of this embodiment are not absolute but relative, and although these indications are appropriate when the components of the electric energy meter are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0041] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0042] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0043] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] During the use of the electric energy meter, the internal components of the electric energy meter are often burned out, resulting in the problem that the electric energy meter cannot be used any longer. The main components that are burned out in the electric energy meter are the PCB boards in the shell that perform measurement functions.

[0045] Therefore, the inventor has studied the internal structure of the electric energy meter and found that the burned PCB board is usually connected with a varistor, and the varistor is installed adjacent to the conductive bar of the relay. Although the distance between the conductive bar and the varistor is strictly controlled when assembling the electric energy meter so that the distance meets the requirements of the safety standards, during the long-term use of the electric energy meter, it is inevitable that the distance between the varistor and the conductive bar will be reduced due to the shaking and deformation of the internal components of the electric energy meter, and then arcing and sparking will occur between the varistor and the conductive bar, and in severe cases, the PCB board may be burned.

[0046] It can be seen that how to reduce the arcing problem between the varistor and the conductive bus of the relay has become a priority issue that needs to be solved to prevent the burning of electricity meter components.

[0047] In view of this, an embodiment of the present application provides an electric energy meter, such as Figure 1 and Figure 2 As shown, the electric energy meter includes a varistor 300, a relay 100 and an insulating partition 400, wherein the varistor 300 is used to protect the circuit in which the electric energy meter is located; the relay 100 includes a conductive bar 200, and the conductive bar 200 is arranged on one side of the varistor 300; the insulating partition 400 is arranged between the varistor 300 and the conductive bar 200, and is used to limit the distance between the conductive bar 200 and the varistor 300.

[0048] Please continue to refer to Figure 1 and Figure 2 Typically, the electric energy meter further includes a housing 500 , and components such as the varistor 300 , the relay 100 and the insulating partition 400 are all installed in the housing 500 .

[0049] In the electric energy meter, the varistor 300 is generally connected to the PCB board 800. Its function is to adjust the voltage to a relatively fixed voltage value through the varistor 300 when the voltage of the circuit where the electric energy meter is located changes, so as to protect the sensitive devices on the circuit and prevent the components on the circuit from burning out.

[0050] The relay 100 is an actuator that plays an important role in the electric energy meter. It can perform the action of opening the switch to disconnect the circuit, and can also perform the action of closing the switch to close the circuit. The relay 100 has an input terminal and an output terminal, which extend from the housing of the relay 100 respectively and are fixed in the housing 500 of the electric energy meter respectively, wherein the input terminal and the output terminal can be a hard connection structure or a soft connection structure. For example, the hard connection structure can be a copper plate connection, and the soft connection structure can be a copper braided wire, a copper foil stacking structure, and the like.

[0051] It can be understood that the input terminal or output terminal of the hard connection structure has high structural stability. After being fixed in the electric energy meter, no swinging or entanglement will occur. The input terminal or output terminal of the soft connection structure can be bent as needed to adapt to the space in the shell 500 of the electric energy meter.

[0052] In the embodiment of the present application, the conductive bar 200 refers to one of the incoming terminal or the outgoing terminal of the relay 100 that is closer to the varistor 300, and it can be a hard connection structure or a soft connection structure, which is not limited in the embodiment of the present application.

[0053] The insulating partition 400 is a structure with insulating properties, which can be assembled in the housing 500 of the electric energy meter, or can be set integrally with the housing 500 of the electric energy meter. The insulating partition 400 is set between the varistor 300 and the conductive bar 200, which means that the insulating partition 400 is partially or completely located between the varistor 300 and the conductive bar 200.

[0054] During the assembly process of the electric energy meter, as long as the varistor 300 and the conductive bar 200 are installed on both sides of the insulating partition 400 according to the above structure, it can be ensured that the distance between the varistor 300 and the conductive bar 200 is at least the thickness of the insulating partition 400. Therefore, there is no need to measure and debug the distance between the varistor 300 and the conductive bar 200, thereby improving the assembly efficiency of the electric energy meter.

[0055] During the use of the electric energy meter, the insulating partition 400 can prevent the conductive bus 200 and the varistor 300 from getting close to each other, so that the electrical clearance and creepage distance between the conductive bus 200 and the varistor 300 are always maintained within the qualified range, and arcing or short circuit between the conductive bus 200 and the varistor 300 is prevented, thereby improving the performance stability and safety of the electric energy meter.

[0056] The insulating partition 400 is arranged between the varistor 300 and the conductive bar 200. There may be many specific situations. In order to clearly describe the various situations, it is first assumed that the conductive bar 200 and the varistor 300 are relatively arranged in a first direction X, wherein the first direction X is the direction of the line between the points closest to the conductive bar 200 and the varistor 300.

[0057] In the first case, in the first direction X, the orthographic projection of the insulating partition 400 partially covers the orthographic projection of the conductive bar 200, and the orthographic projection of the insulating partition 400 partially covers the orthographic projection of the varistor 300. In this case, the charged particles on at least part of the surface of the conductive bar 200 cannot reach the surface of the varistor 300 along the first direction X, and similarly, the charged particles on at least part of the surface of the varistor 300 cannot reach the conductive bar 200 along the first direction X, thereby reducing the probability of arcing between the varistor 300 and the conductive bar 200.

[0058] In the second case, in the first direction X, the orthographic projection of the insulating partition 400 completely covers the orthographic projection of the conductive bar 200, and the orthographic projection of the insulating partition 400 partially covers the orthographic projection of the varistor 300. In this case, in the area directly facing the varistor 300 and the conductive bar 200, there is an insulating partition 400 to block it, so that charged particles cannot flow between the conductive bar 200 and the varistor 300 along the first direction X, that is, the creepage distance between the conductive bar 200 and the varistor 300 is increased, the electric energy meter is not prone to arcing during use, the performance of the electric energy meter is more stable, and the use is safer.

[0059] In the third case, in the first direction X, the orthographic projection of the insulating partition 400 completely covers the orthographic projection of the varistor 300, and the orthographic projection of the insulating partition 400 partially covers the orthographic projection of the conductive bar 200. In this case, in the area directly facing the varistor 300 and the conductive bar 200, there is an insulating partition 400 to block it, so that charged particles cannot flow between the conductive bar 200 and the varistor 300 along the first direction X, that is, the creepage distance between the conductive bar 200 and the varistor 300 is increased, the electric energy meter is not prone to arcing during use, the performance of the electric energy meter is more stable, and the use is safer.

[0060] In the fourth case, in the first direction X, the orthographic projection of the insulating partition 400 completely covers the orthographic projection of the conductive bar 200, and the orthographic projection of the insulating partition 400 completely covers the orthographic projection of the varistor 300. In this case, in the area directly facing the varistor 300 and the conductive bar 200, there is an insulating partition 400 to block it, so that the charged particles cannot flow between the conductive bar 200 and the varistor 300 along the first direction X, and the charged particles cannot flow between the conductive bar 200 and the varistor 300 along other straight directions, but must take a curved route along the edge of the insulating partition 400 and bypass the insulating partition 400 to flow. Therefore, the creepage distance between the conductive bar 200 and the varistor 300 is increased, and the creepage line is more complicated, which further reduces the probability of arcing problems, making the performance of the electric energy meter more stable and safer to use.

[0061] It can be seen that after the insulating partition 400 is set between the varistor 300 and the conductive bar 200, in the above four specific structures, the insulating partition 400 can reduce the probability of arcing between the varistor 300 and the conductive bar 200 to varying degrees, thereby improving the performance stability and safety of the electric energy meter.

[0062] In some embodiments, in the first direction X, when the orthographic projection of the insulating spacer 400 partially covers the orthographic projection of the conductive bar 200 , the insulating spacer 400 is close to the free end of the conductive bar 200 .

[0063] The free end refers to an end of the conductive bar 200 that is not fixed or is not firmly fixed. For example, the first end of the conductive bar 200 is fixed in the housing 500 of the electric energy meter, and the second end is not fixed, or the second end extends into the relay 100, but the second end is movably connected in the relay 100. In this case, the free end of the conductive bar 200 refers to the second end of the conductive bar 200.

[0064] When the conductive bar 200 is deformed or shaken, the free end of the conductive bar 200 is the end with the largest movement amplitude of the conductive bar 200. For example, when the conductive bar 200 is deformed in a direction close to the varistor 300, even if the first end of the conductive bar 200 is at a safe distance from the varistor 300, the second end of the conductive bar 200 may be less than the safe distance from the varistor 300.

[0065] It can be seen that when the insulating partition 400 is preferentially arranged at a position close to the free end of the conductive bar 200 , the displacement of the conductive bar 200 can be limited more timely, thereby preventing the problem of arcing between the conductive bar 200 and the varistor 300 .

[0066] Similarly, in the first direction X, when the orthographic projection of the insulating spacer 400 partially covers the orthographic projection of the varistor 300, the insulating spacer 400 is close to the free end of the varistor 300. Those skilled in the art may refer to the previous embodiment for understanding of the specific principles and technical effects.

[0067] In some embodiments, the thickness of the insulating spacer 400 is greater than or equal to 5.5 mm. This configuration allows the varistor 300 and the conductive bar 200 to be separated by a safe distance of at least 5.5 mm, thereby reducing the risk of short circuit between the varistor 300 and the conductive bar 200.

[0068] like Figure 3 As shown, in some embodiments, the insulating partition 400 is connected to the bottom wall 510 of the shell 500, and a first reinforcing rib 600 is provided on the side of the insulating partition 400 close to the varistor 300. One end of the first reinforcing rib 600 along the length direction is connected to the insulating partition 400, and the other end is connected to the side wall 520 of the shell 500.

[0069] The insulating partition 400 and the bottom wall 510 of the shell 500 may be connected by integral molding, bonding, plug-in connection, etc., which is not limited in the embodiment of the present application.

[0070] The first reinforcing rib 600 serves to support the insulating spacer 400. When the first reinforcing rib 600 is provided, the degree of deformation of the insulating spacer 400 in the direction of the varistor 300 when impacted will be reduced, and the possibility of the insulating spacer 400 breaking is also small.

[0071] like Figure 3 As shown, in some embodiments, the thickness of the first reinforcing rib 600 is set to A, the thickness of the side wall 520 connected to the first reinforcing rib 600 is set to B, and A≥0.5B.

[0072] That is to say, the thickness of the first reinforcing rib 600 is at least 0.5 times the thickness of the side wall 520. This not only makes the connection strength between the first reinforcing rib 600 and the side wall 520 of the shell 500 higher and prevents the two from being easily disconnected or deformed, but also makes the first reinforcing rib 600 itself have higher strength and can provide stable support for the insulating partition 400.

[0073] like Figure 3 As shown, in some embodiments, the thickness A of the first reinforcing rib 600 and the thickness B of the side wall 520 also satisfy: A≤0.8B.

[0074] Typically, the first reinforcing rib 600 and the side wall 520 of the shell 500 are injection molded together. During the cooling process after injection molding, the first reinforcing rib 600 will shrink. The shrinkage of the first reinforcing rib 600 will pull the side wall 520, leaving a dent on the outside of the side wall 520. The thicker the first reinforcing rib 600 is, the more obvious the deformation of the side wall 520 is, and the deeper the dent on the side wall 520 is.

[0075] It was found in the experiment that when A≤0.8B is satisfied, when manufacturing the shell 500, the cooling shrinkage of the first reinforcing rib 600 leaves little or no trace on the side wall 520 of the shell 500, the side wall 520 has high flatness and aesthetics, and the shape change of the shell 500 has little effect on the layout of components inside the shell 500.

[0076] Please continue to refer to Figure 3 In some embodiments, a second reinforcing rib 700 is provided on one side of the insulating partition 400 close to the conductive bar 200 , and the second reinforcing rib 700 is connected to the bottom wall 510 of the housing 500 .

[0077] The second reinforcing rib 700 is integrally formed with the bottom wall 510 of the shell 500 or connected to the bottom wall 510 of the shell 500 through other processes, which is not limited in this embodiment of the present application.

[0078] The second reinforcing rib 700 supports the insulating spacer 400 from a side of the insulating spacer 400 close to the conductive bar 200 , further preventing the insulating spacer 400 from being deformed or broken due to impact during use.

[0079] like Figure 4 As shown, in some embodiments, the second reinforcing rib 700 is in contact with the relay 100 .

[0080] The surface of the second reinforcing rib 700 in contact with the relay 100 may be a surface or edge in any direction of the second reinforcing rib 700 , and the contact form may be surface contact, line contact or point contact.

[0081] Exemplarily, the surface of the second reinforcing rib 700 away from the bottom wall 510 of the housing 500 contacts the relay 100 to prevent the relay 100 from shaking in a direction perpendicular to the bottom wall 510 of the housing 500 .

[0082] It is understandable that other supporting ribs may be provided on the bottom wall 510 of the housing 500 of the electric energy meter, and the other supporting ribs can support the relay 100 together with the second reinforcing ribs 700 to keep the relay 100 balanced.

[0083] It can be seen that the second reinforcing rib 700 not only supports the insulating baffle 400, but also reduces the shaking of the relay 100 by contacting with the relay 100, thereby preventing the internal components of the relay 100 from being displaced during the shaking of the relay 100, which may cause the relay 100 to fail to open or close the circuit. The internal structure of the electric energy meter is more solid and the performance is more stable.

[0084] To summarize, the electric energy meter provided in the embodiment of the present application arranges an insulating partition 400 between the varistor 300 and the conductive bar 200, so that the distance between the varistor 300 and the conductive bar 200 can be maintained at least the thickness of the insulating partition 400, thereby ensuring that the electrical clearance and creepage distance between the conductive bar 200 and the varistor 300 are always maintained within a qualified range, thereby reducing the occurrence of arcing problems during the use of the electric energy meter and improving the performance stability and use safety of the electric energy meter.

[0085] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0086] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric energy meter, characterized in that: include: A varistor, used to protect the circuit where the electric energy meter is located; A relay, comprising a conductive bar, wherein the conductive bar is arranged on one side of the varistor; An insulating partition is provided between the varistor and the conductive bar, and is used to limit the distance between the conductive bar and the varistor.

2. The electric energy meter according to claim 1, characterized in that: The conductive bar and the varistor are arranged opposite to each other in a first direction, and in the first direction, the orthographic projection of the insulating partition completely covers the orthographic projection of the conductive bar.

3. The electric energy meter according to claim 1, characterized in that: The conductive bar and the varistor are arranged opposite to each other in a first direction, and in the first direction, the orthographic projection of the insulating partition completely covers the orthographic projection of the varistor.

4. The electric energy meter according to claim 1, characterized in that: The conductive bar and the varistor are arranged opposite to each other in a first direction. In the first direction, the orthographic projection of the insulating partition completely covers the orthographic projection of the conductive bar, and the orthographic projection of the insulating partition completely covers the orthographic projection of the varistor.

5. The electric energy meter according to any one of claims 1 to 4, characterized in that: The thickness of the insulating partition is greater than or equal to 5.5 mm.

6. The electric energy meter according to any one of claims 1 to 4, characterized in that: It also includes a shell, the insulating partition is connected to the bottom wall of the shell, and a first reinforcing rib is provided on the side of the insulating partition close to the varistor. One end of the first reinforcing rib along the length direction is connected to the insulating partition, and the other end is connected to the side wall of the shell.

7. The electric energy meter according to claim 6, characterized in that: The thickness of the first reinforcing rib is set to A, the thickness of the side wall connected to the first reinforcing rib is set to B, and A≥0.5B.

8. The electric energy meter according to claim 7, characterized in that: The thickness A of the first reinforcing rib and the thickness B of the side wall also satisfy: A≤0.8B.

9. The electric energy meter according to claim 6, characterized in that: A second reinforcing rib is provided on one side of the insulating partition close to the conductive bar, and the second reinforcing rib is connected to the bottom wall of the shell.

10. The electric energy meter according to claim 9, characterized in that: The second reinforcing rib is in contact with the relay.

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