WO2021022210A1 - Enceinte de compteur de service public à évent - Google Patents

Enceinte de compteur de service public à évent Download PDF

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Publication number
WO2021022210A1
WO2021022210A1 PCT/US2020/044602 US2020044602W WO2021022210A1 WO 2021022210 A1 WO2021022210 A1 WO 2021022210A1 US 2020044602 W US2020044602 W US 2020044602W WO 2021022210 A1 WO2021022210 A1 WO 2021022210A1
Authority
WO
WIPO (PCT)
Prior art keywords
enclosure
opening
filter
metering device
recited
Prior art date
Application number
PCT/US2020/044602
Other languages
English (en)
Inventor
Kirby Kimble NELSON, III
Jaykumar Harshadbhai JOSHI
Original Assignee
Itron, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US16/528,367 external-priority patent/US11506522B2/en
Priority claimed from US16/528,384 external-priority patent/US11334956B2/en
Application filed by Itron, Inc. filed Critical Itron, Inc.
Priority to CA3142453A priority Critical patent/CA3142453C/fr
Publication of WO2021022210A1 publication Critical patent/WO2021022210A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D4/00—Tariff metering apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/34—Smart metering supporting the carbon neutral operation of end-user applications in buildings

Definitions

  • FIG. 1A is perspective view of an example of a metering device with a solar shield and an enclosure shown in an exploded configuration.
  • FIG. IB is perspective view of an example of a metering device with a solar shield and an enclosure shown in an assembled configuration.
  • FIG. 2 is a perspective view of an example solar shield usable with a metering device.
  • FIG. 3 is a perspective view of an example enclosure of a metering device, showing an opening defined in an upper surface of the enclosure.
  • FIG. 4 is a perspective view of an example enclosure of a metering device, showing a filter installed in the opening defined in an upper surface of the enclosure.
  • FIG. 5 is a plan view of an upper surface of an example enclosure of a metering device, showing a filter installed in an opening defined in the lower surface.
  • FIG. 6 is a view of a front of an example metering device.
  • FIG. 7 is a simplified cross-sectional diagram showing an example relationship between a solar shield, an enclosure, and a base of a metering device having an orientation according to line 7-7 shown in FIG. 6.
  • FIG. 8 is a perspective view of an example metering device having a solar shield configured to shade an upper portion of an enclosure of the metering device.
  • the disclosure describes a vented enclosure for a utility meter and an external solar shield for the enclosure.
  • the vented enclosure may include one or more vents, vent openings or holes, which allow air to enter, pass through, and exit from the enclosure.
  • at least two vent openings may be disposed in the enclosure, with a first vent opening in an upper half of the enclosure and a second vent opening in the lower half of the enclosure.
  • the air movement through the enclosure cools components operating within the enclosure by convection. This may be particularly desirable if the enclosure is constructed of a material such as acrylic, polycarbonate or other plastics that are thermal insulators or only weakly thermally conductive.
  • an external solar shield prevents sunlight from directly contacting an enclosure of a device, such as a utility meter, having internal electrical components.
  • the solar shield may be located outside the enclosure and in a configuration that defines an air pocket between the solar shield and the vented enclosure.
  • the solar shield may provide one or more openings, allowing air transfer between the atmosphere and the air pocket. The air transfer removes heat from the utility meter by convection, resulting in a lower operating temperature for components within the enclosure and/or other portions of the utility meter.
  • FIG. 1A shows an example of a metering device 100.
  • the enclosure 101 and a solar shield 102 are shown in an exploded configuration.
  • FIG. IB shows an example of a metering device 100.
  • the solar shield 102 and an enclosure are shown in an assembled configuration.
  • the meter 100 may be configured to measure a consumable resource, such as electricity, natural gas, water, etc.
  • a solar shield 102 covers at least part of an enclosure of the utility meter. (Because it is covered, the enclosure 101 is better seen in the views of FIGS. 1 and 3.)
  • a face 104 of the enclosure may be transparent, to allow a user to see portions of a user interface, which may include a data display, and/or other output and/or input.
  • the user interface may include a button 106 or other device to provide input, move a cursor, indicate selections, execute commands, perform a demand-reset, etc.
  • a security device 108 provides tamper resistance and/or evidence.
  • the device may show damage and/or alteration responsive to tampering with the enclosure and/or solar shield 102. Such evidence resists efforts of bad actors who may be trying to receive free resources.
  • the enclosure and/or the solar shield 102 may be attached to a base 110.
  • the base 110 may be part of a meter-box (not shown) or other enclosure, or may be the back or rear portion of the meter 100. Accordingly, the meter-box or base 110 may be attached to a structure, such as an outside wall of a customer’s residence or business.
  • the example solar shield 102 may be connected to the enclosure and/or base by appropriate fasteners, as indicated by the materials used, design cost targets, etc.
  • the solar shield includes a flange 112 that wraps about a perimeter portion of the face 104 of the enclosure.
  • the flange may include a plurality of heat-stake fasteners 114, which may be ultrasonically welded to the enclosure.
  • Other fasteners such as adhesives, mechanical fasteners, friction fittings, etc., may be used.
  • the solar shield may be made of metal, plastic (e.g., acrylonitrile butadiene styrene or polycarbonate) or other material.
  • the solar shield may be painted or coated to improve its ability to reflect sunlight and/or its mean time between failures.
  • At least one opening such as slot 116 may be defined in the solar shield 102.
  • a similar slot (not shown) may be defined on the other side of the solar shield.
  • the slot 116 (and additional slots or openings, if available) may allow air from the atmosphere to ventilate an air pocket defined between the solar shield 102 and the enclosure. (The air pocket is better seen in FIG. 7, and the enclosure is better seen in FIG. 3.)
  • air enters one slot e.g., slot 116
  • passes through the air pocket and exits the other slot. The air absorbs heat as it moves through the air pocket, and thereby cools the utility meter 100 by convection.
  • FIG. 2 shows an example of a solar shield 102 not yet installed on an enclosure.
  • left and right slots 116, 200 allow ventilation between the atmosphere and an air pocket defined between the solar shield 102 and the enclosure (e.g., as seen in FIG. 3). The ventilation allows cooler air from the atmosphere to replace warmer air in the air pocket. While two slots 116, 200 are shown, a different number of slots may be defined in the solar shield 102 and used to ventilate the air pocket. The use of two slots 116, 200 provides cross-ventilation, which may result in more air movement than a single slot.
  • the solar shield 102 has an upper surface 202 and a lower surface 204.
  • the upper and lower surfaces are not slotted, to avoid having a slot in the solar shield 102 that is directly above or below the air passages and/or filters defined in the enclosure. Accordingly, the solar shield provides protection to air passages and/or filters defined in the enclosure.
  • the slots 116, 200 could be defined in the upper and lower surfaces 202, 204 to increase passive air flow and convection heat transfer from the air pocket.
  • the flange 112 carrying fasteners 114 allows connection between the solar shield 102 and the enclosure.
  • FIG. 3 shows portions of the utility meter 100.
  • an enclosure In the example shown, an enclosure
  • the enclosure may attach to a base 110, which may be part of a further enclosure portion (e.g., a sheet metal box) that contains additional components, such as metrology devices, radio and computing electronics, voltage regulator(s), direct current power supplie(s), etc.
  • a further enclosure portion e.g., a sheet metal box
  • additional components such as metrology devices, radio and computing electronics, voltage regulator(s), direct current power supplie(s), etc.
  • a flange 306 may contain one or more fasteners 114, to facilitate attachment of an inside surface of the solar shield to the outside surface of the enclosure 101.
  • a hole or opening 308 is defined in the upper surface 302 of the enclosure 101.
  • the opening 308 (alone, or together with other such openings, e.g., opening associated with filter 500 of FIG. 6) may be sized to allow air flow sufficient to remove heat produced by components within the enclosure (e.g., by convective heat transfer of moving air) while keeping the components below a rated operational temperature.
  • the opening 308 may be bordered by a recessed perimeter region 310.
  • the recessed perimeter region 310 may be sized to allow fastening of a filter (e.g., filter 400 of FIG. 4) to the enclosure 101.
  • FIG. 4 shows the enclosure 101 of a metering device having a filter 400 installed in the opening 308 (seen in FIG. 3) defined in the upper surface 302 of the enclosure.
  • the filter 400 may be installed by a heatmg/welding process, a friction-fit, the use of glues, adhesives, heat staking or thermoplastic staking, and/or chemical fastening means, etc.
  • a perimeter 402 of the filter 400 is glued to the recessed perimeter region 310 (seen in FIG. 3) of the of the opening 308 (also seen in FIG. 3).
  • the filter 400 may be hydrophobic to prevent entry of water, while allowing air to enter and/or leave the enclosure 101, and to thereby exhaust heat by convection.
  • the filter 400 may also be configured to inhibit, reduce and/or rej ect dust, insects, water, contaminants, and/ or other foreign material.
  • the filter 400 may be made of a material comprising or including polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • Materials based on PTFE are sold under several well-known trade names, and prevent water, insects, dust, etc., while allowing the passage of air.
  • FIG. 5 shows the lower surface 304 of an enclosure 101 of a metering device.
  • a filter 500 is installed in an opening (e.g., opening 718 in FIG. 7) defined in the lower surface 304.
  • a perimeter 502 of the filter 500 may be supported by the recessed perimeter region (e.g., similar to region 310 in the upper surface 302, seen in FIG. 3).
  • the base llO may be in communication with a further enclosure, such as a utility meter box (not shown).
  • FIG. 6 shows a metering device 100 with the solar shield removed to allow view of the enclosure 101 and upper filter 400 and lower filter 500.
  • the upper filter 400 and lower filter 500 are disposed on or in openings or holes defined in the enclosure 101. While shown as upper and lower filters that are diametrically opposed about the enclosure, the location of the filters and associated openings in the enclosure may be varied as indicated by particular design requirements.
  • the filters reject water, insects, dust and other materials, but allow the passage of air.
  • the upper filter 400 and a lower filter 500 acting in combination, provide better ventilation than a single filter.
  • air is heated by electronic components within the enclosure 101. The heated air is exhausted through the upper filter 400. As the heated air exits, cooler air enters the enclosure through filter 500. Accordingly, air is exchanged between the air pocket defined between the solar shield and the enclosure 101, which cools components within the enclosure by convection-cooling.
  • the solar shield 102 of FIG. 1 A would cover the filter 400 disposed in or over the opening 308 (as seen in FIGS. 4 and 3, respectively) and would cover the filter 500 disposed in or over an opening 718 (as seen in FIGS. 6 and 7, respectively).
  • FIG. 7 shows an example relationship between a solar shield 102, an enclosure 101, and a base 110 of a metering device 100.
  • the enclosure 101 and base 110 are taken from the perspective of the 7-7 cross-sectional indicators shown in FIG. 6.
  • FIG. 6 does not show the solar shield 102 shown in FIG. 7.
  • FIG. 7 shows an air pocket 700 defined between the enclosure 101 and solar shield 102.
  • the air pocket 700 exchanges air with the atmosphere 702 and an air space 704 defined by, and contained within, the enclosure 101.
  • cooler air from the atmosphere passes through a slot 200 defined in the solar shield 102 and into the air pocket 700.
  • Air from the air pocket 700 is drawn through a filter 500 and into the air space 704 within the enclosure 101.
  • the filter 500 may be define on the bottom of the enclosure, as seen in FIGS. 5 and 6, and may be disposed in or on the opening 718.
  • Air within the air space 704 is heated by operation of components 706 (e.g., metrology and radio components). Heated air leaves the air space 704, through filter 400 of the enclosure 101 and into the air pocket 700 defined between the enclosure 101 and the solar shield 102. Air leaves the air pocket 700 and into the atmosphere 702 through the slot 116 defined in the solar shield 102.
  • components 706 e.g., metrology and radio components
  • FIG. 7 shows an example fastening structure to connect the enclosure 101 to the base 110. Threaded fasteners 708, 710 allow the connection, typically using less than a full revolution. Other fastening means, such as friction fit, snap fit, adhesive, etc., could be substituted.
  • an edge 712 solar shield 102 is carried by a groove 714 defined in the enclosure 101.
  • the groove 714 could be defined in the base 110.
  • the groove 712 could be defined in a region between the enclosure 101 and base 110.
  • the groove 714 may be circular, ring or loop-shaped, and may be formed in the base, enclosure and/or area therebetween, and may be formed around at least a portion of a periphery of the base and/or enclosure. As seen in FIG. 7, an arrangement of the groove 714, the edge 712 of the solar shield 102, and the enclosure 101 may provide opening(s) to allow air movement between the air pocket 700 and atmosphere 702.
  • a flexible strip and/or a fastening strip 716 provides a secure and water tight seal between the solar shield 102 and the enclosure 101.
  • the fastening strip 716 may be resiliently deformable, and made of a material such as rubber, synthetic rubber, caulk, etc.
  • heat transfer by air movement and convection removes heat created by operation of electronic components 706 and incoming sunlight.
  • air moves from the atmosphere through the slot 200 in the solar shield 102, thereby entering the air pocket 700.
  • Air moves from the air pocket 700 through the filter 500 in the opening 718, thereby entering the enclosure 101.
  • air is warmed by the electronic components 706. Warmed air moves from within the enclosure through the upper filter 400 of opening 308 and into the air pocket 700. Air moves from the air pocket through slot 116 in the solar shield and into the atmosphere. Accordingly, heat is dissipated from the metering device 100 by air movement and convention. Additionally, less of the energy present in sunlight warms the components 706, because of the existence of the solar shield 102, which protects the enclosure 101.
  • FIG. 8 shows portions of a metering device 800 having a solar shield 802 configured to shade an upper portion of an enclosure 101 of the metering device. Accordingly, the solar shield may cover (if present) a filter 400 disposed in or over an opening 308 (as seen in FIGS.
  • the partial and/or upper solar shield 802 may be approximately concentric with portions of the enclosure 101.
  • the solar shield 802 protects the upper portion of the enclosure from sunlight, and protects filters mounted to cover openings or holes defined in the enclosure. The filters are thereby protected from sunlight, rain, and other environmental hazards.
  • the solar shield also provides evidence of tampering, if it is removed and/or damaged.
  • the solar shield 802 is separated slightly from the enclosure 101, to thereby create an air pocket between them The air within the enclosure is ventilated to the air pocket, and the air in the air pocket is ventilated to the atmosphere.
  • the edge 804 of the solar shield 802 is separated slightly from the enclosure 101.
  • the separation creates a gap or passage (or left and right passages) that allows air exchange between the air pocket between the solar shield and the atmosphere.
  • openings defined between the edge 804 of the solar shield and the enclosure 101 allow air movement between the air pocket (e.g., air pocket 700 of FIG. 7) and the atmosphere.
  • a metering device comprising: an enclosure having an upper surface; a base coupled to the enclosure to support the enclosure; a groove defined in the base; and a solar shield, to cover at least the upper surface of the enclosure, wherein an edge of the solar shield is positioned within the groove.
  • the metering device as recited in clause 1 additionally comprising: a first opening defined in the enclosure, wherein the first opening allows air movement between an interior of the enclosure and an air pocket defined between the solar shield and the upper surface of the enclosure; a first filter to block water, dust and insects from passing through the first opening; a second opening defined in the enclosure, wherein the second opening allows air movement between atmosphere and the interior of the enclosure; and a second filter to block water, dust and insects from passing through the second opening.
  • a metering device comprising: an enclosure having an upper surface; a base to support the enclosure; a solar shield, to cover at least the upper surface of the enclosure, wherein the solar shield is spaced a distance from the base such that an air pocket is formed between the solar shield and the upper surface of the enclosure; and at least one opening defined in the enclosure, to allow air movement between the air pocket and atmosphere.
  • a metering device comprising: an enclosure, having at least some transparent regions; a base, connected to and supporting the enclosure; a solar shield, attached to at least one of the enclosure and the base, and covering at least an upper surface of the enclosure, wherein: the solar shield is spaced a distance from the base such that an air pocket is formed between the solar shield and the upper surface of the enclosure; and an edge of the solar shield is spaced from the base such that at least one passage is formed between the edge of the solar shield and the base to allow air movement between the air pocket and atmosphere; and a first side opening defined in the solar shield and a second side opening defined in the solar shield to allow air movement between the air pocket and the atmosphere.
  • left and right edges of the solar shield are spaced a distance from the enclosure to define left and right passages, respectively, to allow air exchange between atmosphere and the air pocket.
  • a metering device comprising: an enclosure having an upper surface and a lower surface; a base coupled to the enclosure to support the enclosure; a first opening defined in the upper surface; a second opening defined in the lower surface; a first filter, disposed in or over the first opening, wherein the first filter is configured to inhibit passage of contaminants; and a second filter, disposed in or over the second opening, wherein the second filter is configured to inhibit passage of contaminants.
  • a solar shield attached to at least one of the enclosure and the base, and spaced a distance from the enclosure such that an air pocket is formed between the enclosure and the solar shield; wherein the first filter allows air movement from the air pocket into the enclosure; and wherein the second filter allows air movement between the enclosure and the air pocket.
  • a metering device comprising: an enclosure having an upper surface and a lower surface; a first opening defined in the upper surface; a second opening defined in the lower surface; a first filter, disposed in or over the first opening; a second filter, disposed in or over the second opening; a solar shield, covering at least one of the first filter and the second filter, wherein the solar shield is spaced a distance from the enclosure such that an air pocket is formed between the solar shield and the upper surface of the enclosure, and wherein the air pocket is vented to atmosphere; wherein the enclosure is vented to the air pocket through the first filter and the second filter.
  • a metering device comprising: an enclosure having an upper surface and a lower surface; a first opening defined in the upper surface; a second opening defined in the lower surface; a solar shield, covering the upper surface and covering the lower surface, wherein the solar shield is a spaced distance from the enclosure to form and air pocket in an area therebetween, and wherein the air pocket is vented to atmosphere; wherein the enclosure is vented to the air pocket through the first opening and the second opening.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

La présente invention concerne une enceinte destinée à un dispositif de compteur de service public qui est conçu pour réduire les températures d'air internes. Dans un exemple, le dispositif de compteur de service public présente un écran solaire et/ou un ou des passages d'air de ventilation filtrés. Dans l'exemple, une enceinte est fixée à une base. La ou les ouvertures peuvent être définies dans l'enceinte, pour permettre à l'air d'éliminer par convection la chaleur provenant du dispositif de dosage. Les ouvertures peuvent être recouvertes de filtres, pour empêcher l'entrée d'eau, de poussière, d'insectes, etc. Un écran solaire peut recouvrir au moins une surface supérieure de l'enceinte. Une poche d'air peut être définie entre l'écran solaire et au moins la surface supérieure de l'enceinte. L'air provenant de l'intérieur de l'enceinte peut être ventilé dans la poche d'air et l'air provenant de l'intérieur de la poche d'air peut être ventilé dans l'atmosphère. La ventilation élimine la chaleur provenant de l'intérieur de l'enceinte, tandis que l'écran solaire rejette l'addition d'énergie calorifique.
PCT/US2020/044602 2019-07-31 2020-07-31 Enceinte de compteur de service public à évent WO2021022210A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA3142453A CA3142453C (fr) 2019-07-31 2020-07-31 Enceinte de compteur de service public a event

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16/528,367 US11506522B2 (en) 2019-07-31 2019-07-31 Solar shield for utility meter
US16/528,384 2019-07-31
US16/528,384 US11334956B2 (en) 2019-07-31 2019-07-31 Vented utility meter enclosure
US16/528,367 2019-07-31

Publications (1)

Publication Number Publication Date
WO2021022210A1 true WO2021022210A1 (fr) 2021-02-04

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Application Number Title Priority Date Filing Date
PCT/US2020/044602 WO2021022210A1 (fr) 2019-07-31 2020-07-31 Enceinte de compteur de service public à évent

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CA (1) CA3142453C (fr)
WO (1) WO2021022210A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115902328A (zh) * 2022-12-26 2023-04-04 国网黑龙江省电力有限公司供电服务中心 一种高寒地区电能表恒温装置及恒温方法

Citations (7)

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Publication number Priority date Publication date Assignee Title
US4618071A (en) * 1984-11-29 1986-10-21 Allied Corporation Venting device for an electronics housing
US20110069434A1 (en) * 2008-04-02 2011-03-24 Actaris S.A.S. Remote meter reading device
US20110259903A1 (en) * 2010-04-22 2011-10-27 Joseph Messner Sun shield for outdoor electrcial equipment
WO2011142685A2 (fr) * 2010-05-11 2011-11-17 Vasiljevic Marko Coffret de compteur de distribution avec dispositif de ventilation à monter sur un pylône, un mur ou un support dans les lieux publics, indépendamment ou côte à côte
CN108282981A (zh) * 2017-12-28 2018-07-13 东本电气科技(苏州)有限公司 无线远传燃气表数据站用散热壳体
DE102018206292B3 (de) * 2018-04-24 2019-07-25 Vega Grieshaber Kg Einschraubbares Druckausgleichselement für ein Gehäuse einer elektronischen Vorrichtung, ein Druckausgleichssystem mit einem solchen Druckausgleichselement und ein Messgerät mit einem solchen Druckausgleichselement oder Druckausgleichssystem
KR102006573B1 (ko) * 2018-05-24 2019-08-01 주식회사 씨앤유글로벌 결로방지기능을 구비한 스마트 미터

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4618071A (en) * 1984-11-29 1986-10-21 Allied Corporation Venting device for an electronics housing
US20110069434A1 (en) * 2008-04-02 2011-03-24 Actaris S.A.S. Remote meter reading device
US20110259903A1 (en) * 2010-04-22 2011-10-27 Joseph Messner Sun shield for outdoor electrcial equipment
WO2011142685A2 (fr) * 2010-05-11 2011-11-17 Vasiljevic Marko Coffret de compteur de distribution avec dispositif de ventilation à monter sur un pylône, un mur ou un support dans les lieux publics, indépendamment ou côte à côte
CN108282981A (zh) * 2017-12-28 2018-07-13 东本电气科技(苏州)有限公司 无线远传燃气表数据站用散热壳体
DE102018206292B3 (de) * 2018-04-24 2019-07-25 Vega Grieshaber Kg Einschraubbares Druckausgleichselement für ein Gehäuse einer elektronischen Vorrichtung, ein Druckausgleichssystem mit einem solchen Druckausgleichselement und ein Messgerät mit einem solchen Druckausgleichselement oder Druckausgleichssystem
KR102006573B1 (ko) * 2018-05-24 2019-08-01 주식회사 씨앤유글로벌 결로방지기능을 구비한 스마트 미터

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115902328A (zh) * 2022-12-26 2023-04-04 国网黑龙江省电力有限公司供电服务中心 一种高寒地区电能表恒温装置及恒温方法
CN115902328B (zh) * 2022-12-26 2023-07-04 国网黑龙江省电力有限公司供电服务中心 一种高寒地区电能表恒温装置及恒温方法

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CA3142453C (fr) 2024-03-12
CA3142453A1 (fr) 2021-02-04

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