Heat dissipation structure for ammeter terminal shell unit

Abstract

The utility model discloses a heat dissipation structure for an ammeter terminal shell unit, which comprises an ammeter bottom box, a window is arranged at a selected position on the front surface of a box body of the ammeter bottom box, a heat dissipation ceramic chip matched with the window in size is fixedly assembled at the window position of the window, and the back side of the heat dissipation ceramic chip is flush with the back surface of the ammeter bottom box. The front surface is attached to the heating electrical component; a heat dissipation aluminum back plate is formed on the back side of the box body of the electric meter bottom box; the outer contour of the heat dissipation aluminum back plate is matched with a component cavity of the electricity meter bottom box, the face side of the heat dissipation aluminum back plate is a plane and is attached to the electricity meter bottom box in the assembling process, and gaps among the electricity meter bottom box, the heat dissipation ceramic piece and the heat dissipation aluminum back plate are filled with heat conduction silica gel. The back shell structure can be used as a back shell structure to be matched with other face shells of any size and shape, has a good heat dissipation effect on electrical components in an electricity meter, and can cooperate with other heat dissipation devices or schemes to further improve the heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent electric meters, in particular to a heat dissipation structure for an electric meter terminal housing unit. Background Art

[0002] In order to facilitate people's lives, smart meters such as smart electricity meters, smart water meters, and smart gas meters are becoming more and more popular in people's lives. Among them, smart electricity meters, as smart terminals of smart grids, in addition to the metering functions of traditional electricity meters, also have two-way multi-rate metering functions, user-side control functions, two-way data communication functions with multiple data transmission modes, and anti-electricity theft functions in order to adapt to the use of smart grids and new energy.

[0003] In traditional metering meters, although the electrical components inside the meter will generate heat when working, the heat generation is small, and there is no need to set up a special heat dissipation structure. Natural heat dissipation can be achieved simply by the meter box contacting the air. With the advancement of microelectronics technology and instrumentation technology, the functions of smart meters are becoming increasingly diverse, but the size of the meter body is getting smaller and smaller. This increase in functional integration directly leads to a sharp increase in the heat generation of smart meters. The natural heat dissipation efficiency of the meter box made of traditional injection molding materials is low, which can easily cause the internal temperature of the meter to be too high, affecting the service life of related components, and even damaging electrical components, resulting in damage to the meter. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a heat dissipation structure for an electric meter terminal housing unit. The heat dissipation box structure has high heat dissipation efficiency and good safety, and can be used to solve the shortcomings of the above-mentioned background technology.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions:

[0006] A heat dissipation structure for an electric meter terminal housing unit, comprising an electric meter bottom box, on which an assembly portion for assembly with an electric meter top box is formed;

[0007] The meter bottom box has a window at a selected position on the front of the box body, and a heat dissipation ceramic sheet matching the size of the window is fixedly installed at the window position, the back side of the heat dissipation ceramic sheet is flush with the back side of the meter bottom box, and the front side of the heat dissipation ceramic sheet is against the heat-generating electrical components; the meter bottom box is formed with a heat dissipation aluminum back plate on the back side of the box body; the outer contour of the heat dissipation aluminum back plate matches the component cavity of the meter bottom box, the front side of the heat dissipation aluminum back plate is flat, and the meter bottom box is fitted during assembly, and the gaps between the meter bottom box, the heat dissipation ceramic sheet and the heat dissipation aluminum back plate are filled with thermal conductive silicone.

[0008] As a further limitation, the electric meter bottom box is an integrally formed injection molded part.

[0009] As a further limitation, the assembly portion is a combination of a pre-positioning structure and a PCB support column, and the pre-positioning structure is one or a combination of a snap buckle, a plug buckle, a magnetic structure, and an embedded groove.

[0010] As a further limitation, the electric meter bottom box and the electric meter upper box have outer edge sealing grooves with sealing rings as sealing structural components at the outer edges of the buckling parts.

[0011] As a further limitation, the heat dissipation ceramic sheet is rectangular or circular; and multiple heat dissipation ceramic sheets can be formed on the same electric meter bottom box.

[0012] As a further limitation, the surface of the heat dissipation ceramic sheet is coated with heat dissipation silica gel, and is in surface contact with the heat generating component in the component cavity through the heat dissipation silica gel.

[0013] As a further limitation, the meter bottom box is formed with a window sealing groove at the outer contour position of the window, and the window sealing groove is an annular structure protruding toward one side of the component cavity. The window sealing groove has an annular inner ring matching the window size, and the heat dissipating ceramic sheet is embedded in the annular inner ring; the window sealing groove is lined with a sealing ring structure on the back side to achieve sealing of the window on the back side of the meter bottom box.

[0014] As a further limitation, a sinking groove matching the size of the heat dissipation aluminum back plate is formed on the back side of the electric meter bottom box, and the heat dissipation aluminum back plate is embedded in the sinking groove.

[0015] As a further limitation, a plurality of spaced back ribs are formed on the back side of the heat dissipation aluminum back plate, and the back ribs are vertically penetrated, and the heat dissipation aluminum back plate uses the through grooves between the back ribs as hot air flow channels.

[0016] As a further limitation, the heat dissipating aluminum back plate is also formed with a layer of film-like heat-spreading material on the surface of the side against which the meter bottom box is attached, and the film-like heat-spreading material is a heat-conductive carbon fiber film layer or a graphene film layer; and the heat-conductive silicone is coated on the surface of the film-like heat-spreading material.

[0017] Beneficial effects: The heat dissipation structure of the utility model for the meter terminal housing unit has a simple structure and a reasonable design. It utilizes a heat dissipation ceramic sheet and a heat dissipation aluminum back plate as a heat-dissipating heat-conducting structure, and cooperates with a heat dissipation aluminum back plate with high thermal conductivity to contact the air for heat dissipation; it has high thermal conductivity, and the overall quality and size are controllable; at the same time, it can be matched in size according to meter upper boxes of different sizes, shapes and models, and has better adaptability; in addition, it can cooperate with other heat dissipation devices or solutions to further improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of a preferred embodiment of the utility model.

[0019] Figure 2 It is a schematic diagram of the back structure of a preferred embodiment of the utility model.

[0020] Among them: 1. Component cavity; 2. Outer edge sealing groove; 3. PCB support column; 4. PCB assembly column; 5. Heat dissipation silica gel; 6. Heat dissipation ceramic sheet; 7. Window sealing groove; 8. Electric meter bottom box; 9. Wiring cavity; 10. Heat dissipation aluminum back plate; 11. Back ribs. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0022] See also Figure 1 , Figure 2 A preferred embodiment of a heat dissipation structure for an electric meter terminal housing unit is provided. In this embodiment, the main body of the heat dissipation structure for the electric meter terminal housing unit is an electric meter bottom box 8, which is made of PC plastic material and is integrally injection molded using an injection molding process. The electric meter bottom box 8 can be matched in size and shape according to a specific matching electric meter upper box to make it have better adaptability.

[0023] The front of the meter bottom box 8 has a concave cavity, which is divided into upper and lower cavities, corresponding to the component cavity 1 and the wiring cavity 9 in the common meter assembly form, respectively. The component cavity 1 is used to assemble electrical components that realize the corresponding functions of the meter, and the wiring cavity 9 is used to approach and connect the meter lines.

[0024] The meter bottom box 8 is formed with a circle of stepped outer edge sealing groove 2 on the outer edge of the top surface of the cavity wall corresponding to the component cavity 1, and a PCB support column 3 is formed in the cavity of the component cavity 1, and threaded assembly holes are formed on the top surfaces of the cavity walls on both sides of the wiring cavity 9. The outer edge sealing groove 2 can realize the pre-positioning of the upper box of the meter on the surface of the meter bottom box 8. After the pre-positioning, the upper box of the meter can be fixed on the surface of the meter bottom box 8 by screwing the fastening screws into the PCB support column 3 and the threaded assembly hole. At the same time, the sealing ring embedded in the outer edge sealing groove 2 is used to realize the sealing and closure of the component cavity 1 after the covering and fixing.

[0025] The PCB support column 3 can also cooperate with the PCB assembly column 4 in the component cavity 1 to achieve auxiliary assembly of electrical components in the corresponding component cavity.

[0026] In another embodiment, the pre-limiting fixing structure of the outer edge sealing groove 2 can also be replaced by one or a combination of a snap-on, plug-in buckle, and magnetic attraction structure while only retaining the sealing function.

[0027] In this embodiment, the meter bottom box 8 has a window at the upper right corner of the bottom surface of the component cavity 1, and a window sealing groove 7 is pre-formed on the outer edge of the window position. The window sealing groove 7 is an annular groove that protrudes as a whole toward one side of the component cavity. The window sealing groove 7 has a circle of sealing ring structure embedded in the groove cavity on the back side.

[0028] The window sealing groove 7 can serve as both a reinforcement structure and a sealing structure;

[0029] When the window sealing groove 7 is used as a reinforcement structure, a heat dissipation ceramic sheet 6 is embedded and fixed on the inner side of the window sealing groove 7. The heat dissipation ceramic sheet 6 is a rectangle that matches the inner ring size of the window sealing groove 7. The surface of the heat dissipation ceramic sheet 6 is coated with heat dissipation silicone rubber 5, and the heat is dissipated by surface contact with the high-heat generating components arranged at the corresponding position in the component cavity through the heat dissipation silicone rubber 5.

[0030] The meter bottom box 8 is formed with a groove on the back side corresponding to the component cavity 1, and a heat dissipation aluminum back plate 10 is installed in the groove. The front side of the heat dissipation aluminum back plate 10 is flat, and it fits with the bottom surface of the groove of the meter bottom box 8 during assembly, and the corresponding heat dissipation ceramic sheet 6 is flush with the bottom surface of the groove of the meter bottom box 8 on the back side. The meter bottom box 8, the heat dissipation ceramic sheet 6 and the heat dissipation aluminum back plate 10 are kept in surface contact and the gap is filled on the contact surface by thermal conductive silicone.

[0031] In different embodiments, when there are multiple high-heat generating components in the component cavity 1 and the high-heat generating components are not suitable for centralized assembly, multiple structural windows (no more than three) can be opened on the bottom surface of the component cavity 1, and heat dissipation ceramic sheets 6 can be formed at each window position.

[0032] When the window sealing groove 7 is used as a sealing structure, it can be used to seal the window set on the heat dissipation ceramic sheet 6 on the back side of the meter bottom box 8 through the sealing ring embedded in the back groove cavity of the window sealing groove 7 when the heat dissipation aluminum back plate 10 is attached to the heat dissipation ceramic sheet 6 and the back surface of the meter bottom box 8.

[0033] In this embodiment, the heat dissipation ceramic sheet 6 is used to absorb the heat generated by high-heat-generating components during operation and conduct it to the heat dissipation aluminum back plate 10. The heat generated by the high-heat-generating components is quickly discharged from the meter housing through heat exchange through the high thermal conductivity material properties of the heat dissipation aluminum back plate 10, thereby ensuring that the component cavity 1 of the meter is within a safe temperature range.

[0034] In order to improve the heat exchange efficiency of the heat dissipating aluminum back plate 10, the heat dissipating aluminum back plate 10 of this embodiment is formed with a plurality of back ribs 11 at intervals on the back side. These back ribs 11 are vertically penetrated. On the one hand, they can be used to improve the overall structural strength of the meter bottom box 8. On the other hand, the through grooves between the back ribs 11 can be used as hot air flow channels to improve the heat exchange efficiency with the air.

[0035] In another embodiment, when the window size in the component cavity 1 is small, in order to further improve the heat dissipation effect, a layer of thermally conductive carbon fiber film layer or graphene film layer can be formed on the heat dissipation aluminum back plate 10 on the side surface corresponding to the meter bottom box as a heat-dissipating material, and the corresponding thermally conductive silicone is applied between the above-mentioned heat-dissipating material and the meter bottom box 8 and the heat dissipation ceramic sheet 6 as a bonding surface gap filling material.

[0036] In another embodiment, when the appearance is important, the heat dissipation aluminum back plate 10 can directly cover the entire back side of the meter bottom box 8, that is, completely cover the component cavity 1 part and the wiring cavity 9 part, rather than only covering the component cavity 1 part as in the present embodiment. However, the drawback is that the cost of the heat dissipation aluminum back plate 10 increases due to the increased size.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A heat dissipation structure for an electric meter terminal housing unit, characterized in that: It comprises an electric meter bottom box, on which an assembly portion for assembly with an electric meter upper box is formed; The meter bottom box has a window at a selected position on the front of the box body, and a heat dissipation ceramic sheet matching the size of the window is fixedly installed at the window position, the back side of the heat dissipation ceramic sheet is flush with the back side of the meter bottom box, and the front side of the heat dissipation ceramic sheet is against the heat-generating electrical components; the meter bottom box is formed with a heat dissipation aluminum back plate on the back side of the box body; the outer contour of the heat dissipation aluminum back plate matches the component cavity of the meter bottom box, the front side of the heat dissipation aluminum back plate is flat, and the meter bottom box is fitted during assembly, and the gaps between the meter bottom box, the heat dissipation ceramic sheet and the heat dissipation aluminum back plate are filled with thermal conductive silicone.

2. The heat dissipation structure for the electric meter terminal housing unit according to claim 1, characterized in that: The electric meter bottom box is an integrally formed injection molded part.

3. The heat dissipation structure for the electric meter terminal housing unit according to claim 1, characterized in that: The assembly portion is a combination of a pre-positioning structure and a PCB support column, and the pre-positioning structure is one or a combination of a buckle, a plug buckle, a magnetic structure, and an embedded groove.

4. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: The electric meter bottom box and the electric meter upper box have outer edge sealing grooves with sealing rings as sealing structural parts at the outer edges of the buckling parts.

5. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: The heat dissipation ceramic sheet is rectangular or circular; and a plurality of heat dissipation ceramic sheets can be formed on the same electric meter bottom box.

6. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: The surface of the heat dissipation ceramic sheet is coated with heat dissipation silica gel, and is in surface contact with the heat generating component in the component cavity through the heat dissipation silica gel.

7. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: The meter bottom box is formed with a window sealing groove at the outer contour position of the window. The window sealing groove is an annular structure protruding toward one side of the component cavity. The window sealing groove has an annular inner ring matching the size of the window, and the heat dissipation ceramic sheet is embedded in the annular inner ring; the window sealing groove is lined with a sealing ring structure on the back side to achieve sealing of the window on the back side of the meter bottom box.

8. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: The meter bottom box is formed with a sink groove matching the size of the heat dissipation aluminum back plate on the back side of the box body, and the heat dissipation aluminum back plate is embedded in the sink groove.

9. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: A plurality of back ribs arranged at intervals are formed on the back side of the heat dissipation aluminum back plate. The back ribs are arranged to penetrate vertically. The heat dissipation aluminum back plate uses the through grooves between the back ribs as hot air flow channels.

10. The heat dissipation structure for an electric meter terminal housing unit according to claim 1, characterized in that: The heat dissipation aluminum back plate is also formed with a layer of film-like heat-spreading material on the surface of the side against which the meter bottom box is attached. The film-like heat-spreading material is a heat-conductive carbon fiber film layer or a graphene film layer; and the heat-conductive silicone is coated on the surface of the film-like heat-spreading material.

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