Electricity meter with heat-dissipation and moisture-proof performance

Abstract

This invention relates to the field of moisture-proof and heat-dissipating technology for electricity meters, and particularly to an electricity meter with heat dissipation and moisture-proof performance. The invention includes a meter body and an outer casing applied to the meter body. It also includes a sealing assembly disposed within the outer casing for heat dissipation and moisture-proof sealing between the meter body and the outer casing. The sealing assembly includes an air bladder disposed between the meter body and the outer casing, forming a U-shaped filling cavity at the contact point between the meter body and the outer casing, with the air bladder located within the filling cavity. A heat-absorbing assembly for heat dissipation of the meter body is disposed within the outer casing. The heat-absorbing assembly includes a fixed cylinder fixedly disposed within the outer casing, with a heat-conducting plate disposed between the fixed cylinder and the meter body. The fixed cylinder also contains a storage cavity for storing a phase-change material. When the phase-change material absorbs heat and melts, the air bladder deflates, allowing the filling cavity to communicate with the interior of the outer casing. Initially, the air bladder is inflated, filling and sealing the filling cavity, effectively preventing humid air from entering the outer casing and damaging the meter body.

Description

Technical Field

[0001] This invention relates to the field of moisture-proof and heat-dissipating technology for electricity meters, and more particularly to an electricity meter with heat dissipation and moisture-proof performance. Background Technology

[0002] As a core device for electricity metering, electricity meters are widely used in various complex environments, and their operational reliability is closely related to their heat dissipation and moisture-proof performance. Existing electricity meters generate a large amount of heat from their internal electronic components during operation; poor heat dissipation will lead to increased metering errors, accelerated component aging, and even burn-out failures.

[0003] Traditional solutions typically involve creating ventilation holes in the casing to utilize natural convection for heat dissipation. However, this method has inherent drawbacks: the ventilation holes allow humid air and dust from the outside to easily penetrate the casing. During day-night temperature differences or seasonal temperature changes, the internal hot air cools and contracts, creating negative pressure that actively draws in moisture, leading to condensation and corrosion on the circuit board, reduced insulation performance, and severely impacting the equipment's lifespan and measurement accuracy. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an energy meter with heat dissipation and moisture-proof properties.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: including a watch body and a shell applied on the watch body; further including a sealing component disposed inside the shell for heat dissipation, moisture prevention and sealing of the watch body and the shell, the sealing component including an airbag disposed between the watch body and the shell, the position where the watch body and the shell contact each other forming an incline filling cavity, and the airbag being located inside the filling cavity; The outer shell is provided with a heat-absorbing component for heat dissipation of the watch body. The heat-absorbing component includes a fixed cylinder fixedly installed inside the outer shell. A heat-conducting plate is provided between the fixed cylinder and the watch body. The fixed cylinder is provided with a storage cavity for storing the phase-changing material. When the phase-changing material absorbs heat and melts, the air bladder deflates, so that the filling cavity and the interior of the outer shell are interconnected.

[0006] Preferably, the transforming material is paraffin wax, and a pneumatic component is provided inside the fixed cylinder, the pneumatic component and the bottom of the fixed cylinder forming a storage cavity.

[0007] Preferably, the pneumatic assembly includes a piston plate slidably disposed within a fixed cylinder, and a piston rod is fixedly disposed on the piston plate.

[0008] Preferably, a sliding plate is slidably disposed on the piston rod, the sliding plate is disposed on the upper side of the piston plate, and a first spring is disposed between the piston plate and the sliding plate.

[0009] Preferably, the upper side of the sliding plate is provided with a self-locking component for self-locking. The self-locking component includes an electromagnetic suction plate disposed on the sliding plate, and the top surface of the inner wall of the fixed cylinder is provided with multiple other electromagnetic suction plates.

[0010] Preferably, the fixed cylinder is provided with an airflow assembly, and the airflow assembly is in communication with the interior of the airbag and the outer shell.

[0011] Preferably, the airflow assembly includes two airflow pipes that pass through the fixed cylinder and are staggered vertically. One of the airflow pipes communicates with the airbag, and the other airflow pipe has an airflow plate at its end. The airflow plate is located on the main board side of the watch body, and a closing plate is slidably provided on the side of the airflow pipe that communicates with the airbag.

[0012] Preferably, a drying shell is provided at the junction of one of the closed plates and the fixed cylinder, and a molecular sieve plate is provided inside the drying shell.

[0013] Preferably, the end of the pneumatic assembly is provided with an alarm component for high temperature alarm. The alarm component includes a second spring fixedly mounted on the piston rod. The second spring has two movable contact terminals, and a buzzer electrically connected to the terminals is provided on the outside of the housing.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes paraffin phase change material to absorb the heat from the watch body and drive a piston mechanism. This achieves automatic control of the expansion and contraction of the air bladder based on the internal temperature of the device, thereby controlling the opening and closing of the sealing cavity. This automatic switching between sealing and heat dissipation ensures the device is tightly sealed against moisture at low temperatures and automatically opens channels to accelerate heat dissipation at high temperatures, guaranteeing reliable operation of the watch body in complex environments. Simultaneously, the device achieves adaptive heat dissipation: at low temperatures, internal air circulation combined with the heat absorption of melting paraffin dissipates heat from the watch body; at high temperatures, the through-flow of the filling cavity and existing cooling fans accelerate heat dissipation, reducing energy consumption and usage. The movement of the piston plate triggers the closing plate to open the air bladder passage, achieving multi-level temperature response control, ensuring that the heat dissipation channel only opens when truly needed. It only opens when high temperatures are being dissipated, avoiding the decrease in sealing performance caused by frequent opening and closing. When the paraffin melts and solidifies, the heat absorption component and the air pressure component work together to integrate the airbag exhaust and the motherboard air blowing into the same airflow path. A drying shell is set up to filter the intake air with a molecular sieve. This achieves the dual purpose of forcing air cooling of the motherboard while opening the heat dissipation channel, and drying and dehumidifying the supplementary air when the temperature drops and the device is resealed. This effectively prevents the internal condensation problem caused by the cooling after high-temperature heat dissipation. When the device is in use, it not only has a good heat dissipation effect, but also prevents the entry of humid air, ensuring the use of the device. Moreover, there is no need to use an additional louver structure to close the heat dissipation holes, further improving the practicality and ease of use of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front-view structure proposed in this invention; Figure 2 This is a schematic cross-sectional view of the structure proposed in this invention from the left side. Figure 3 This is a schematic diagram of the cross-sectional structure from the lower side perspective proposed in this invention; Figure 4 This is a schematic diagram of the cross-sectional structure from the upper side perspective proposed in this invention; Figure 5 This is a schematic diagram of the partial upper-side cross-sectional structure proposed in this invention. Figure 1 ; Figure 6 This is a schematic diagram of the partial upper-side cross-sectional structure proposed in this invention. Figure 2 ; Figure 7 This is a schematic diagram of the workflow proposed in this invention.

[0016] In the diagram: 1. Outer shell; 2. Body; 3. Sealing assembly; 31. Filling cavity; 32. Airbag; 4. Heat absorption assembly; 41. Fixing cylinder; 42. Heat conducting plate; 5. Air pressure assembly; 51. Piston plate; 52. Piston rod; 53. Sliding plate; 54. First spring; 6. Airflow assembly; 61. Airflow pipe; 62. Closing plate; 63. Drying shell; 64. Molecular sieve plate; 65. Airflow plate; 7. Self-locking assembly; 71. Magnetic suction plate; 8. Alarm assembly; 81. Second spring; 82. Terminal block; 83. Buzzer. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0019] Reference Figures 1-7 An energy meter with heat dissipation and moisture-proof performance includes a meter body 2 and a housing 1 applied on the meter body 2; it also includes a sealing component 3 disposed inside the housing 1 for heat dissipation and moisture-proof sealing of the meter body 2 and the housing 1, the sealing component 3 including an airbag 32 disposed between the meter body 2 and the housing 1, a C-shaped filling cavity 31 is formed at the contact position of the meter body 2 and the housing 1, and the airbag 32 is located inside the filling cavity 31; The outer casing 1 contains a heat-absorbing component 4 for heat dissipation of the dial indicator 2. The heat-absorbing component 4 includes a fixed cylinder 41 fixedly installed inside the outer casing 1. A heat-conducting plate 42 is provided between the fixed cylinder 41 and the dial indicator 2. The fixed cylinder 41 contains a storage cavity for storing the phase-changing material. When the phase-changing material absorbs heat and melts, the air bladder 32 deflates, making the filling cavity 31 interconnected with the interior of the outer casing 1. Initially, the air bladder 32 is inflated, filling and sealing the filling cavity 31, which effectively prevents humid air from entering the outer casing 1 and damaging the dial indicator 2. When the dial indicator 2 is in use, it generates a certain amount of heat. At this time, the phase-changing material in the fixed cylinder 41 absorbs heat, adsorbing the heat generated by the dial indicator 2, thereby cooling the dial indicator 2. When the phase-changing material absorbs heat, it also deforms, causing it to absorb more heat. When the material melts and expands to a certain volume, the temperature inside the outer shell 1 reaches a high temperature. At this point, the gas inside the airbag 32 is expelled, allowing the outer shell 1 and the surface 2 to communicate with each other through the filling cavity 31. The filling cavity 31 then forms a heat dissipation channel. Due to the expansion of the hot air in the surface 2, moisture will not enter the outer shell 1 from the filling cavity 31, and the outer shell 1 can continuously dissipate heat. When the temperature inside the outer shell 1 decreases, the airbag 32 can reseal the filling cavity 31, thereby preventing moisture from entering and ensuring the heat dissipation effect inside the device. In addition, an existing cooling fan is installed inside the outer shell 1. When the filling cavity 31 is fully open, the cooling fan can intervene to dissipate heat and ensure the heat dissipation effect of the device. When the device is not at a high temperature, the cooling fan does not work, which can reduce power consumption.

[0020] Preferably, the transforming material is paraffin wax, and a pneumatic component 5 is provided inside the fixed cylinder 41. The pneumatic component 5 and the bottom of the fixed cylinder 41 form a storage cavity. When the paraffin wax melts, it can effectively absorb the heat generated by the body 2. At the same time, the heat-conducting plate 42 can be a graphite plate to improve its heat conduction efficiency and accelerate the heat dissipation effect of the body 2.

[0021] Preferably, the pneumatic assembly 5 includes a piston plate 51 slidably disposed in the fixed cylinder 41, and a piston rod 52 is fixedly disposed on the piston plate 51. When the paraffin material melts, the paraffin changes from solid to liquid. At this time, the liquid paraffin pushes the piston plate 51 to move, and the air on the upper side of the piston plate 51 is squeezed out, so that the air acts on the main plate of the body 2 to improve the heat dissipation efficiency of the body 2.

[0022] Preferably, a sliding plate 53 is slidably disposed on the piston rod 52. The sliding plate 53 is disposed on the upper side of the piston plate 51, and a first spring 54 is disposed between the piston plate 51 and the sliding plate 53. The first spring 54 is initially in an extended state. When the paraffin melts, it will push the piston plate 51 to rise. At the same time, the piston plate 51 will push the sliding plate 53 to rise through the spring. When the internal temperature of the equipment is continuously high, the sliding plate 53 will contact the top surface of the inner wall of the fixed cylinder 41. As the temperature of the equipment continues to rise, the piston plate 51 will continuously compress the first spring 54. Since the first spring 54 is disposed between the piston plate 51 and the sliding plate 53, when the first spring 54 is compressed to its minimum, the airflow pipe 61 connected to the airbag 32 will form a through connection with another airflow pipe 61, so that the gas in the airbag 32 is discharged, realizing the connection of the filling cavity 31 and improving the heat dissipation effect of the equipment.

[0023] Preferably, a self-locking assembly 7 for self-locking is provided on the upper side of the sliding plate 53. The self-locking assembly 7 includes an electromagnetic suction plate 71 provided on the sliding plate 53, and multiple other electromagnetic suction plates 71 are provided on the top surface of the inner wall of the fixed cylinder 41. When the sliding plate 53 is in contact with the top surface of the inner wall of the fixed cylinder 41, the electromagnetic suction plate 71 opens to keep the sliding plate 53 fixed to the top surface of the inner wall of the fixed cylinder 41. When the equipment temperature decreases, the first spring 54 gradually resets, which pushes the piston plate 51 to gradually descend. When the piston plate 51 descends to the appropriate position, the electromagnetic suction plate 71 opens. At this time, the first spring 54 pulls the sliding plate 53 to descend. When the sliding plate 53 descends, the compressed air moving downwards enters the airbag 32, causing the airbag 32 to re-inflate to achieve a sealing effect.

[0024] Preferably, the fixed cylinder 41 is provided with an airflow component 6, and the airflow component 6 is in communication with the airbag 32 and the interior of the outer shell 1, so as to facilitate the exhaust of gas and ensure the heat dissipation effect inside the equipment.

[0025] Preferably, the airflow assembly 6 includes two airflow pipes 61 that pass through the fixed cylinder 41, and the two airflow pipes 61 are staggered vertically. One airflow pipe 61 communicates with the airbag 32, and the end of the other airflow pipe 61 is provided with an airflow plate 65, which is located on the main board side of the instrument body 2. A closing plate 62 is slidably provided on the side of the airflow pipe 61 that communicates with the airbag 32. When the piston plate 51 and the sliding plate 53 move upward, the closing plate 62 closes the airflow pipe 61 that communicates with the airbag 32. Therefore, when the piston plate 51 moves upward, gas is discharged from the other airflow pipe 61, and at the same time, it acts on the main board of the instrument body 2 through the airflow plate 65, ensuring the flow of gas and improving the heat dissipation effect of the device. When the internal temperature of the device is continuously high, the piston plate 51 and the sliding plate 53 will be continuously pushed. When the sliding plate 53 passes the position of the closing plate 62, since the closing plate 62 is L-shaped... Therefore, the sliding plate 53 will drive the closing plate 62 to rise. At this time, the airflow pipe 61 that is connected to the closing plate 62 is connected to the fixed cylinder 41. The gas in the airbag 32 enters the fixed cylinder 41, the airbag 32 deflates, the filling cavity 31 is opened, and the gas in the airbag 32 is discharged through another airflow pipe 61, which accelerates the gas flow at the main board of the body 2. When the equipment cools down, since the sliding plate 53 is restricted to the top surface of the inner wall of the fixed cylinder 41, the piston plate 51 will descend first. When the piston plate 51 descends, it will create a suction effect. At this time, the gas enters the fixed cylinder 41 through the airflow pipe 61. At the same time, when the piston plate 51 returns to the appropriate position, the electromagnetic suction plate 71 is released. Since the two airflow pipes 61 are set up vertically, the gas generated by the downward movement of the electromagnetic suction plate 71 is pressed into the airbag 32 to make it expand. At the same time, the closing plate 62 closes the airflow pipe 61 again, while the other airflow pipe 61 is in a continuous suction state.

[0026] Preferably, a drying shell 63 is provided at the point where one of the closed plates 62 and the fixed cylinder 41 communicates, and a molecular sieve plate 64 is provided inside the drying shell 63. The gas drawn into the fixed cylinder 41 is filtered and dried by the molecular sieve plate 64, which can further reduce the moisture inside the equipment and prevent molecular liquefaction from occurring at high temperatures to low temperatures, which would cause the equipment to become damp.

[0027] Preferably, the end of the pneumatic assembly 5 is provided with an alarm assembly 8 for high temperature alarm. The alarm assembly 8 includes a second spring 81 fixedly mounted on the piston rod 52. The second spring 81 is provided with two movable contact terminals 82, and the outer side of the housing 1 is provided with a buzzer 83 electrically connected to the terminals 82. When the piston rod 52 exceeds the limited stroke of the piston plate 51, it means that the equipment is continuously hot. The piston rod 52 compresses the second spring 81, so that the positive terminal 82 and the negative terminal 82 are electrically connected. At this time, the buzzer 83 sounds an alarm to remind the equipment of high temperature, so as to facilitate subsequent handling. Working principle In its initial state, the airbag 32 is inflated and completely fills the C-shaped filling cavity 31 between the watch body 2 and the outer shell 1, forming an effective seal to prevent external humid air from entering the interior of the outer shell 1 and protect the circuitry of the watch body 2.

[0028] When the watch body 2 is working, it generates heat, which is transferred to the storage cavity inside the fixed cylinder 41 through the heat-conducting plate 42. The paraffin material in the storage cavity absorbs the heat and gradually melts from a solid to a liquid state, causing it to expand in volume. The expansion of the liquid paraffin pushes the piston plate 51 upwards within the fixed cylinder 41. The piston plate 51, through the first spring 54, pushes the sliding plate 53 upwards synchronously. At this time, since the sliding plate 53 has not yet contacted the top wall of the fixed cylinder 41, the airflow pipe 61 connected to the airbag 32 is closed by the L-shaped closing plate 62. The air compressed by the upward movement of the piston plate 51 can only be discharged through another airflow pipe 61, and then blown towards the main board of the watch body 2 via the airflow plate 65 to assist in heat dissipation.

[0029] As the temperature of the body 2 continues to rise, the paraffin wax melts and expands further, pushing the piston plate 51 and sliding plate 53 to continue rising until the sliding plate 53 contacts the top surface of the inner wall of the fixed cylinder 41. At this time, the electromagnetic suction plate 71 is energized and engages, locking the sliding plate 53 in the top position. As the temperature continues to rise, the piston plate 51 continues to move upward against the elastic force of the first spring 54, and the first spring 54 is gradually compressed. When the piston plate 51 moves upward to the position past the L-shaped closing plate 62, the sliding and rising piston plate 51 drives the closing plate 62 to move upward synchronously, making the originally closed airflow pipe 61 open with the inside of the fixed cylinder 41. At this time, the gas in the airbag 32 enters the fixed cylinder 41 through the airflow pipe 61, the airbag 32 deflates and contracts, the filling cavity 31 is opened, forming a heat dissipation channel that connects the inside and outside. At the same time, the gas entering the fixed cylinder 41 is continuously blown towards the main board through another airflow pipe 61 and airflow plate 65, and the existing cooling fan starts to work, achieving efficient heat dissipation.

[0030] As the piston plate 51 moves upward, the second spring 81, fixed to the piston rod 52, moves upward accordingly. When the piston rod 52 exceeds the limit stroke of the piston plate 51, the second spring 81 is compressed, and the two terminals 82 inside it come into contact with each other, completing the circuit and triggering the buzzer 83 to issue a high-temperature alarm, reminding the operator that the equipment temperature is abnormal.

[0031] As the equipment temperature drops, the paraffin wax gradually solidifies and contracts, causing the piston plate 51 to descend under the push of the first spring 54 and the piston rod 52. Since the sliding plate 53 is locked at the top by the electromagnetic chuck 71, the first spring 54 between the piston plate 51 and the sliding plate 53 is further deformed. When the piston plate 51 descends to the predetermined position, the control system disconnects the electromagnetic chuck 71, releasing the sliding plate 53. The sliding plate 53 then rapidly descends under the elastic force of the first spring 54, compressing the air inside the fixed cylinder 41. This compressed air enters the airbag 32 through the airflow pipe 61, causing it to re-inflate and reseal the filling cavity 31. Simultaneously, the closing plate 62 resets under gravity or spring action, sealing the airflow pipe 61 connected to the airbag 32. The negative pressure generated by the continued descent of the piston plate 51 draws in external air through another airflow pipe 61 and the drying shell 63. The molecular sieve plate 64 inside the drying shell 63 dries and filters the drawn-in air before replenishing it into the fixed cylinder 41, preparing for the next cycle. This invention utilizes paraffin phase change material to absorb the working heat of the gauge body 2 and drive the piston plate 51. This achieves automatic control of the expansion and contraction of the air bladder 32 based on the internal temperature of the equipment, thereby controlling the opening and closing of the filling cavity 31. This realizes automatic switching between sealing and heat dissipation, ensuring the equipment is tightly sealed against moisture at low temperatures and automatically opens the channel to accelerate heat dissipation at high temperatures. This ensures reliable operation of the gauge body 2 in complex environments. Simultaneously, the equipment achieves adaptive heat dissipation: at low temperatures, internal air circulation combined with the heat absorption of melting paraffin dissipates heat from the gauge body 2; at high temperatures, the through-hole of the filling cavity 31 and the existing cooling fan accelerate heat dissipation, reducing energy consumption and usage. The movement of the piston plate 51 triggers the closing plate 62 to open the air bladder 32 passage, achieving multi-level temperature response control, ensuring the heat dissipation channel only... The system only opens when high-temperature heat dissipation is truly needed, avoiding the degradation of sealing performance caused by frequent opening and closing. When the paraffin melts and solidifies, the heat-absorbing component 4 and the air pressure component 5 work together to integrate the exhaust of the airbag 32 and the air blowing from the motherboard into the same airflow path. A drying shell 63 is set up to filter the intake air with a molecular sieve, achieving the dual purpose of forcing air cooling of the motherboard while opening the heat dissipation channel, and drying and dehumidifying the supplementary air when the temperature drops and the system is resealed. This effectively prevents internal condensation caused by cooling down after high-temperature heat dissipation, ensuring that the equipment not only has good heat dissipation effect but also prevents humid air from entering, thus protecting the equipment. Furthermore, it eliminates the need for an additional louver structure to close the heat dissipation holes, further improving the practicality and ease of use of the equipment.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electric energy meter with heat-dissipation and moisture-proof performance, comprising a meter body (2) and a shell (1) applied on the meter body (2), characterized in that, It also includes a sealing assembly (3) disposed inside the outer casing (1) for heat dissipation, moisture protection and sealing of the watch body (2) and the outer casing (1). The sealing assembly (3) includes an airbag (32) disposed between the watch body (2) and the outer casing (1). A U-shaped filling cavity (31) is formed at the contact position between the watch body (2) and the outer casing (1), and the airbag (32) is located inside the filling cavity (31). The outer shell (1) is provided with a heat-absorbing component (4) for heat dissipation of the body (2). The heat-absorbing component (4) includes a fixed cylinder (41) fixedly installed inside the outer shell (1). A heat-conducting plate (42) is provided between the fixed cylinder (41) and the body (2). A storage cavity for storing the phase-changing material is provided inside the fixed cylinder (41). When the phase-changing material absorbs heat and melts, the air bag (32) deflates, so that the filling cavity (31) and the interior of the outer shell (1) are interconnected.

2. The electric energy meter with heat-dissipation and moisture-proof performance according to claim 1, characterized in that, The transforming material uses paraffin wax, and a pneumatic assembly (5) is provided inside the fixed cylinder (41), the pneumatic assembly (5) and the bottom of the fixed cylinder (41) forming a storage cavity.

3. An energy meter with heat dissipation and moisture-proof performance according to claim 2, characterized in that, The pneumatic assembly (5) includes a piston plate (51) slidably disposed in a fixed cylinder (41), and a piston rod (52) is fixedly disposed on the piston plate (51).

4. An energy meter with heat dissipation and moisture-proof performance according to claim 3, characterized in that, A sliding plate (53) is slidably disposed on the piston rod (52). The sliding plate (53) is disposed on the upper side of the piston plate (51), and a first spring (54) is disposed between the piston plate (51) and the sliding plate (53).

5. The electric energy meter with heat-dissipation and moisture-proof performance according to claim 4, characterized in that, The upper side of the sliding plate (53) is provided with a self-locking assembly (7) for self-locking. The self-locking assembly (7) includes an electromagnetic suction plate (71) provided on the sliding plate (53), and multiple other electromagnetic suction plates (71) are provided on the top surface of the inner wall of the fixed cylinder (41).

6. The electric energy meter with heat-dissipation and moisture-proof performance according to claim 5, characterized in that, An airflow assembly (6) is provided on the fixed cylinder (41), and the airflow assembly (6) is in communication with the airbag (32) and the interior of the outer shell (1).

7. The electric energy meter with heat-dissipation and moisture-proof performance according to claim 6, characterized in that, The airflow assembly (6) includes two airflow pipes (61) that pass through the fixed cylinder (41) and are staggered vertically. One of the airflow pipes (61) is connected to the airbag (32), and the other airflow pipe (61) has an airflow plate (65) at its end. The airflow plate (65) is located on the main board side of the body (2). A closing plate (62) is slidably provided on the side of the airflow pipe (61) that is connected to the airbag (32).

8. The electric energy meter with heat-dissipation and moisture-proof performance according to claim 7, characterized in that, A drying shell (63) is provided at the point where one of the closed plates (62) and the fixed cylinder (41) are connected, and a molecular sieve plate (64) is provided inside the drying shell (63).

9. The electric energy meter with heat-dissipation and moisture-proof performance according to claim 8, characterized in that, The end of the pneumatic assembly (5) is provided with an alarm assembly (8) for high temperature alarm. The alarm assembly (8) includes a second spring (81) fixedly mounted on the piston rod (52). The second spring (81) has two movable contact terminals (82) inside, and a buzzer (83) electrically connected to the terminals (82) is provided on the outside of the housing (1).

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