CN106124818B - multi-rate electric energy meter - Google Patents
multi-rate electric energy meter Download PDFInfo
- Publication number
- CN106124818B CN106124818B CN201610749665.1A CN201610749665A CN106124818B CN 106124818 B CN106124818 B CN 106124818B CN 201610749665 A CN201610749665 A CN 201610749665A CN 106124818 B CN106124818 B CN 106124818B
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- China
- Prior art keywords
- electric energy
- energy meter
- unit
- central controller
- cabinet
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/56—Special tariff meters
- G01R11/57—Multi-rate meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Thermal Sciences (AREA)
- Drying Of Gases (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of multi-rate electric energy meter, including central controller, electric energy meter metering units, voltage sampling unit, current sampling unit, power circuit and battery；The voltage sampling unit connects the signal input part of electric energy meter metering units with the signal output end of current sampling unit；The data input pin of the data output end connection central controller of electric energy meter metering units；The pulse signal output end of electric energy meter metering units is connected with isolation circuit；The output end of the central controller is connected with LCD display module；It is provided with plastic layer around the box outer surface, sets up the accommodating chamber for accommodating air inlet machine inside cabinet；Air inlet machine is set up in the accommodating chamber, the lower end of accommodating chamber is provided with through injection well, and the injection well is connected with air guide channel；Effectively prevent refrigerating efficiency is low, outside liquid invasion when the harm that also causes dangerous and humidity to increase in readily permeable inlet body, box be not easy to be coupled the defect securely loosened.
Description
Technical field
The present invention relates to electric energy meter technical field, in particular to a kind of multi-rate electric energy meter.
Background technique
Due to limitation of use occasion, such as city, rural area or factory and enterprise etc., the workload of meter reading personnel is very big, and
And it is also not easy to manage.The case where additionally, due to application, is different, has relatively high want to stabilization, the reliability of electric energy meter
It asks.
A kind of multi-rate electric energy meter, including central controller, electric energy meter metering units, voltage sample list are proposed on the market
Member, current sampling unit, power circuit and battery；The signal output end of the voltage sampling unit and current sampling unit connects
Connect the signal input part of electric energy meter metering units；The data of the data output end connection central controller of electric energy meter metering units are defeated
Enter end；The pulse signal output end of electric energy meter metering units is connected with isolation circuit；The output end of the central controller connects
There is LCD display module；The control signal of central controller is connected with program switch；Central controller is also connected with clock electricity
Road, memory, infrared communication circuit and serial communication circuit；The output end that the power supply of the power circuit is defeated is separately connected electric energy
The power inputs of table metering units, central controller, serial communication circuit and clock circuit power input；Battery
Power output end is separately connected the power input of central controller and clock circuit, the central controller, electric energy meter metering
Unit, voltage sampling unit, current sampling unit, power circuit and battery are arranged in box, and the box is connected to control
In the cabinet of case processed.
And box is often placed in the cabinet of control cabinet, often atmospheric water content is very high in the cabinet of box,
The component of box in this way in cabinet just will receive the erosion of the very high moisture of these contents, so that causing to damage and run to occur
Problem.In addition the water sucting part to dehumidify often dismantles decomposition inconvenience, cabinet lower end with ground face contact and by moisture in air
Erosion, the intracorporal refrigeration effect of case it is also bad.
In addition existing box is coated with pressure-sensitive adhesive coating, the pressure-sensitive adhesive coating and control often by its surface
The inner wall of case is bonded, and is thus acted on to be fixed, and often viscous effect, such structure tend to pine occur to gel coating
Dynamic problem is not easy connection so as to cause box and securely loosens.
Summary of the invention
To solve the above problems, effectively preventing the box in cabinet the present invention provides a kind of multi-rate electric energy meter
Component just will receive the erosion of the very high moisture of these contents so that causing to damage and run the water sucting part for going wrong, dehumidifying
Often disassembly decompose inconvenient, cabinet lower end with ground face contact the intracorporal refrigeration effect of erosion, case by moisture in air
Also bad, box is not easy to be coupled the defect securely loosened.
A kind of solution of multi-rate electric energy meter in order to overcome the deficiencies in the prior art, the present invention provides, specifically
It is as follows:
A kind of multi-rate electric energy meter, including central controller, electric energy meter metering units, voltage sampling unit, current sample
Unit, power circuit and battery；The voltage sampling unit connects electric energy meter with the signal output end of current sampling unit
Measure the signal input part of unit；The data input pin of the data output end connection central controller of electric energy meter metering units；Electric energy
The pulse signal output end of table metering units is connected with isolation circuit；The output end of the central controller is connected with LCD and shows
Module；The control signal of central controller is connected with program switch；Central controller be also connected with clock circuit, memory,
Infrared communication circuit and serial communication circuit；The defeated output end of the power supply of the power circuit is separately connected electric energy meter metering units
Power input, central controller, serial communication circuit and clock circuit power input；The power output end of battery
It is separately connected the power input of central controller and clock circuit, the central controller, electric energy meter metering units, voltage are adopted
Sample unit, current sampling unit, power circuit and battery are arranged in box, and the box is connected to the cabinet of control cabinet
In；
It is provided with plastic layer 102 around 101 outer surface of cabinet, is had between the plastic layer 102 and the cabinet 101
There is cooling chamber road, allows cabinet with more preferably reliability and refrigeration performance in conjunction with such chamber road, at the top on 101 one side of cabinet
The upper through slot 101A with for being vented, with the through slot 101A for being used to be vented on the wall surface of opposite plastic layer 102
It is used to arrange described in the chamber road position 102A for being vented with exhaust fan 103 with the chamber road 102A for being used to be vented
The through slot 101A of gas and in the cooling chamber road between the chamber road 102A that is vented with director strip 104；
It is provided with the first through slot 101B for being used to supply gas in the bottom of 101 another side of cabinet, is being used to send with described first
The through slot 102B that the top of the wall surface of the through slot 101B of gas opposite plastic layer 102 is used to supply gas with second, described the
Via the guide ribs being in cooling chamber road between the through slot 102B that the one through slot 101B and second for being used to supply gas is used to supply gas
105 are connected, and are equipped with drain sump in that one end of 102 outer surface of plastic layer at the through slot 102B that described second is used to supply gas
106, there is multi-layer absorbent sieve plate in the drain sump and is connected with the outer surface of the plastic layer 102；
The drain sump 106 includes tank body 106B, the card interface 106A that the tank body 106B is opened up with the plastic layer 102
It is mutually clamped, further includes in addition having quick lime 106C in the tank body 106B；
Perforation eye 102C is provided on the wall surface of the opposite plastic layer 102 with the cabinet rear wall, in the plastic layer
The sieve 1010 being attached on perforation eye 102C is connected on 102, the sieve 1010 is stablized via fixed device.
The tank body is rectangular parallelepiped structure.
The card interface 106A is square opening shape.
Bottom plate 107 is arranged in the lower end of the cabinet 101, is connected with vertical bar 108 in 107 lower end of bottom plate, described
Vertical bar 108 penetrates the plastic layer 102 and ground；The junction stated between vertical bar 108 and the plastic layer 102
It is carried out filled with rubber 109 closed.
The sieve is discoid.
In addition the surface of the box is connected by connector with the inner wall of control cabinet；
The specific structure of the connector are as follows: it contains the first scarfing unit unit A06 being fixed on the inner wall of control cabinet
With the second scarfing unit unit A01 on the surface for being fixed on box, the first scarfing unit unit A06 be provided with interlocking mouth A07 with
And the hook of glass bronze material is also had with the interlocking mouth A07 hollow cavity A03, the first scarfing unit unit A06 communicated
Part A04, the hook A04 is opposite face-to-face with hollow cavity A03, is in addition also bent towards the second scarfing unit unit A01；It is described
Second scarfing unit unit A01 is strip structure, and the bottom of the second scarfing unit unit A01 has scarf joint A09, the interlocking
Head A09 imbeds the interlocking mouth A07, and in addition the lower end A08 outstanding outwardly that has of the scarf joint A09 is hooked in the hook
In A04.
The present invention has the beneficial effect that: in conjunction with such framework, the gas in box 101 is discharged via exhaust fan 103,
It allows box 101 that the gas containing large quantity of moisture to be obtained to take out of, can also be cooled down when allowing box 101 to be dried.In this way
When extraneous air-flow is via water suction sieve plate or quick lime, the moisture in air-flow will be taken away by water suction sieve plate or quick lime, keep away
Exempt from the moisture in air into box 101, when needing to replace water suction sieve plate or quick lime, drain sump is passed through card interface
106A is extracted, and can be achieved with better convenient disassembly in this way.It also can continual realization refrigerating function via perforation eye；
Via the hook A04 is added, the lower end A08 of the scarf joint A09 is hooked in the hook A04, because the hook A04
The reaction force of glass bronze material compression recovery is strong, can be via the reaction of compression recovery when assembly box and control cabinet
Power allows the first scarfing unit unit A06 to be halved together with the second scarfing unit unit A01, and then the hook A04 restores, and is hooked in lower end
On A08, accordingly even when pipeline be subjected to displacement or external action under, the first scarfing unit unit A06 and the second scarfing unit unit A01
Combination still very securely, will not lead to the problem of mutually to loosen and be detached from, so that ensuring subsequent with more smoothly.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention
Fig. 2 is the structural schematic diagram of cabinet of the invention.
Fig. 3 is box portion structural schematic diagram of the invention.
Fig. 4 is a kind of schematic diagram of specific embodiment of scarfing unit unit provided by the present invention；
Fig. 5 is the structural schematic diagram of the first scarfing unit unit provided by the present invention；
Fig. 6 is a kind of cross-sectional view of specific embodiment of scarfing unit provided by the present invention.
Specific embodiment
The present invention is described further below in conjunction with attached drawing.
1- Fig. 6 is it is found that a kind of multi-rate electric energy meter of the invention with reference to the accompanying drawings, including the metering of central controller, electric energy meter
Unit, voltage sampling unit, current sampling unit, power circuit and battery；The voltage sampling unit and current sample list
The signal input part of the signal output end connection electric energy meter metering units of member；In the data output end connection of electric energy meter metering units
Entreat the data input pin of controller；The pulse signal output end of electric energy meter metering units is connected with isolation circuit；The center control
The output end of device processed is connected with LCD display module；The control signal of central controller is connected with program switch；Central controller
It is also connected with clock circuit, memory, infrared communication circuit and serial communication circuit；The defeated output of the power supply of the power circuit
Hold the power supply of the power input for being separately connected electric energy meter metering units, central controller, serial communication circuit and clock circuit
Input terminal；The power output end of battery is separately connected the power input of central controller and clock circuit, the center control
Device, electric energy meter metering units, voltage sampling unit, current sampling unit, power circuit and battery processed are arranged in box, institute
Box is stated to be connected in the cabinet of control cabinet；
The cabinet 101 is provided with plastic layer 102 around 101 outer surface of cabinet, in the plastic layer 102 and institute
Stating has cooling chamber road between cabinet 101, allows cabinet with more preferably reliability and refrigeration performance in conjunction with such chamber road, in cabinet
With the through slot 101A for being used to be vented on the top on 101 one side, the opposite plastics with the through slot 101A for being used to be vented
With the chamber road 102A for being used to be vented on the wall surface of floor 102, exhaust fan is had in the chamber road position 102A for being vented
103, with director strip in the cooling chamber road between the through slot 101A for being vented and for the chamber road 102A that is vented
104；
It is provided with the first through slot 101B for being used to supply gas in the bottom of 101 another side of cabinet, is being used to send with described first
The through slot 102B that the top of the wall surface of the through slot 101B of gas opposite plastic layer 102 is used to supply gas with second, described the
Via the guide ribs being in cooling chamber road between the through slot 102B that the one through slot 101B and second for being used to supply gas is used to supply gas
105 are connected, and are equipped with drain sump in that one end of 102 outer surface of plastic layer at the through slot 102B that described second is used to supply gas
106, there is multi-layer absorbent sieve plate in the drain sump and is connected with the outer surface of the plastic layer 102；
The drain sump 106 includes tank body 106B, the card interface 106A that the tank body 106B is opened up with the plastic layer 102
It is mutually clamped, further includes in addition having quick lime 106C in the tank body 106B；
Allow cabinet with very good refrigerating efficiency, the wall surface of the opposite plastic layer 102 with 101 rear wall of cabinet body
On be provided with perforation eye 102C, be connected on the plastic layer 102 be attached to perforation eye 102C on sieve 1010, the sieve
1010 stablize via fixed device.
The tank body is rectangular parallelepiped structure.
The card interface 106A is square opening shape.
The present invention has the beneficial effect that: in conjunction with such framework, the gas in cabinet 101 is discharged via exhaust fan 103,
It allows cabinet 101 that the gas containing large quantity of moisture to be obtained to take out of, can also be cooled down when allowing cabinet 101 to be dried.In this way
When extraneous air-flow is via water suction sieve plate or quick lime, the moisture in air-flow will be taken away by water suction sieve plate or quick lime, keep away
Exempt from the moisture in air into cabinet 101, when needing to replace water suction sieve plate or quick lime, drain sump is passed through card interface
106A is extracted, and can be achieved with better convenient disassembly in this way.It also can continual realization refrigerating function via perforation eye.
Avoid cabinet lower end by the erosion of moisture in air, bottom plate 107 is arranged in the lower end of the cabinet 101,
107 lower end of bottom plate is connected with vertical bar 108, and the vertical bar 108 penetrates the plastic layer 102 and ground；It is described
The junction stated between vertical bar 108 and the plastic layer 102 is closed to carry out filled with rubber 109.
The sieve is discoid.
In addition the surface of the box is connected by connector with the inner wall of control cabinet；
The specific structure of the connector are as follows: it contains the first scarfing unit unit A06 being fixed on the inner wall of control cabinet
With the second scarfing unit unit A01 on the surface for being fixed on box, the first scarfing unit unit A06 be provided with interlocking mouth A07 with
And the hook of glass bronze material is also had with the interlocking mouth A07 hollow cavity A03, the first scarfing unit unit A06 communicated
Part A04, the hook A04 is opposite face-to-face with hollow cavity A03, is in addition also bent towards the second scarfing unit unit A01；It is described
Second scarfing unit unit A01 is strip structure, and the bottom of the second scarfing unit unit A01 has scarf joint A09, the interlocking
Head A09 imbeds the interlocking mouth A07, and in addition the lower end A08 outstanding outwardly that has of the scarf joint A09 is hooked in the hook
In A04.
The present invention is described in a manner of Detailed description of the invention above, it will be understood by those of skill in the art that the disclosure
It is not limited to embodiments described above, in the case of without departing from the scope of the present invention, can make a variety of changes, change and replace
It changes.
Claims (4)
1. a kind of multi-rate electric energy meter, which is characterized in that including central controller, electric energy meter metering units, voltage sampling unit,
Current sampling unit, power circuit and battery；The voltage sampling unit is connected with the signal output end of current sampling unit
The signal input part of electric energy meter metering units；The data input of the data output end connection central controller of electric energy meter metering units
End；The pulse signal output end of electric energy meter metering units is connected with isolation circuit；The output end of the central controller is connected with
LCD display module；The control signal of central controller is connected with program switch；Central controller be also connected with clock circuit,
Memory, infrared communication circuit and serial communication circuit；The output end that the power supply of the power circuit is defeated is separately connected electric energy meter
The power inputs of metering units, central controller, serial communication circuit and clock circuit power input；The electricity of battery
Source output terminal is separately connected the power input of central controller and clock circuit, and the central controller, electric energy meter metering are single
Member, voltage sampling unit, current sampling unit, power circuit and battery are arranged in box, and the box is connected to control
In the cabinet of case；
The cabinet is provided with plastic layer around the box outer surface, has cooling between the plastic layer and the cabinet
Chamber road, with the through slot for being used to be vented on the top on cabinet one side, the opposite plastics with the through slot for being used to be vented
It is used to arrange described in the chamber road position for being vented with exhaust fan with the chamber road for being used to be vented on the wall surface of floor
The through slot of gas and in the cooling chamber road between the chamber road that is vented with director strip；
It is provided with the first through slot for being used to supply gas in the bottom of cabinet another side, in the through slot phase for being used to supply gas with described first
Pair the top of wall surface of plastic layer be used to the through slot supplied gas, the described first through slot and second for being used to supply gas with second
Through slot for supplying gas is connected by the guide ribs being in cooling chamber road, is being moulded at the through slot that described second is used to supply gas
That one end of bed of material outer surface is equipped with drain sump, has multi-layer absorbent sieve plate in the drain sump and with the appearance of the plastic layer
Face is connected；
The drain sump includes tank body, and the tank body is mutually clamped with the card interface that the plastic layer opens up, in addition in the tank body
In further include having quick lime；
It is provided with perforation eye on the wall surface of the opposite plastic layer with cabinet rear wall, is connected with to be attached on the plastic layer and pass through
Sieve on logical eye, the sieve are stablized via fixed device；
Bottom plate is arranged in the lower end of the cabinet, is connected with vertical bar in the bottom plate lower end, the vertical bar penetrates the modeling
The bed of material and ground；The junction for stating vertical bar and the plastics interlayer is closed to carry out filled with rubber；
In addition the surface of the box is connected by connector with the inner wall of control cabinet；
The specific structure of the connector are as follows: it contains the first scarfing unit unit being fixed on the inner wall of control cabinet and is fixed on
The second scarfing unit unit on the surface of box, the first scarfing unit unit are provided with interlocking mouth and communicate with the interlocking mouth
Hollow cavity, the first scarfing unit unit also has the hook of glass bronze material, and the hook is face-to-face with hollow cavity
In opposite directions, in addition also towards the second scarfing unit unit bending；The second scarfing unit unit is strip structure, second scarfing unit
The bottom of unit has scarf joint, and the scarf joint imbeds the interlocking mouth, in addition the scarf joint with outstanding outwardly
Lower end is hooked in the hook.
2. multi-rate electric energy meter according to claim 1, it is characterised in that the tank body is rectangular parallelepiped structure.
3. multi-rate electric energy meter according to claim 1, it is characterised in that the card interface is square opening shape.
4. multi-rate electric energy meter according to claim 1, it is characterised in that the sieve is discoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610749665.1A CN106124818B (en) | 2016-08-29 | 2016-08-29 | multi-rate electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610749665.1A CN106124818B (en) | 2016-08-29 | 2016-08-29 | multi-rate electric energy meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106124818A CN106124818A (en) | 2016-11-16 |
| CN106124818B true CN106124818B (en) | 2018-12-18 |
Family
ID=57273853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610749665.1A Active CN106124818B (en) | 2016-08-29 | 2016-08-29 | multi-rate electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106124818B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29601526U1 (en) * | 1996-01-30 | 1997-06-05 | AEG Zähler GmbH, 31785 Hameln | Housing of an electronic electricity meter |
| CN101762728A (en) * | 2008-12-02 | 2010-06-30 | 上海协霖电子有限公司 | Minitype single-phase electronic multi-rate electric energy meter |
| CN202421327U (en) * | 2011-12-21 | 2012-09-05 | 江苏盛德电子仪表有限公司 | Three-phase four-wire multi-rate remote electric energy meter |
| CN202975103U (en) * | 2012-12-10 | 2013-06-05 | 乐清市蓝天高科技有限公司 | Three-phase multi-rate guide rail electric energy meter |
| CN103149399A (en) * | 2011-12-07 | 2013-06-12 | 江苏盛德电子仪表有限公司 | Single phase multi-rate electric energy meter |
| CN103344078A (en) * | 2013-07-08 | 2013-10-09 | 合肥华凌股份有限公司 | Refrigerator |
| CN105226531A (en) * | 2015-09-25 | 2016-01-06 | 钱国臣 | A kind of can the electric power electric cabinet of Local cooling |
| CN205213247U (en) * | 2015-12-18 | 2016-05-04 | 深圳长城开发科技股份有限公司 | Ammeter and meter shell body |
| CN205374559U (en) * | 2016-03-03 | 2016-07-06 | 国网山东省电力公司鄄城县供电公司 | Novel modified power metering box ventilation structure |
| CN205374556U (en) * | 2016-02-19 | 2016-07-06 | 保定德乐普电器制造有限公司 | Ammeter case with dehumidification and heat dissipation function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8587949B2 (en) * | 2007-03-27 | 2013-11-19 | Electro Industries/Gauge Tech | Electronic meter having user-interface and central processing functionality on a single printed circuit board |
-
2016
- 2016-08-29 CN CN201610749665.1A patent/CN106124818B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29601526U1 (en) * | 1996-01-30 | 1997-06-05 | AEG Zähler GmbH, 31785 Hameln | Housing of an electronic electricity meter |
| CN101762728A (en) * | 2008-12-02 | 2010-06-30 | 上海协霖电子有限公司 | Minitype single-phase electronic multi-rate electric energy meter |
| CN103149399A (en) * | 2011-12-07 | 2013-06-12 | 江苏盛德电子仪表有限公司 | Single phase multi-rate electric energy meter |
| CN202421327U (en) * | 2011-12-21 | 2012-09-05 | 江苏盛德电子仪表有限公司 | Three-phase four-wire multi-rate remote electric energy meter |
| CN202975103U (en) * | 2012-12-10 | 2013-06-05 | 乐清市蓝天高科技有限公司 | Three-phase multi-rate guide rail electric energy meter |
| CN103344078A (en) * | 2013-07-08 | 2013-10-09 | 合肥华凌股份有限公司 | Refrigerator |
| CN105226531A (en) * | 2015-09-25 | 2016-01-06 | 钱国臣 | A kind of can the electric power electric cabinet of Local cooling |
| CN205213247U (en) * | 2015-12-18 | 2016-05-04 | 深圳长城开发科技股份有限公司 | Ammeter and meter shell body |
| CN205374556U (en) * | 2016-02-19 | 2016-07-06 | 保定德乐普电器制造有限公司 | Ammeter case with dehumidification and heat dissipation function |
| CN205374559U (en) * | 2016-03-03 | 2016-07-06 | 国网山东省电力公司鄄城县供电公司 | Novel modified power metering box ventilation structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106124818A (en) | 2016-11-16 |
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