EP0769794A1 - Dispositif de protection pour composant électrique - Google Patents

Dispositif de protection pour composant électrique Download PDF

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Publication number
EP0769794A1
EP0769794A1 EP96116493A EP96116493A EP0769794A1 EP 0769794 A1 EP0769794 A1 EP 0769794A1 EP 96116493 A EP96116493 A EP 96116493A EP 96116493 A EP96116493 A EP 96116493A EP 0769794 A1 EP0769794 A1 EP 0769794A1
Authority
EP
European Patent Office
Prior art keywords
overload relay
terminal cover
electrical component
protection device
retainer bushing
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP96116493A
Other languages
German (de)
English (en)
Other versions
EP0769794B1 (fr
Inventor
Tatsuhiro c/o Matsushita El.Ind.Co Ltd Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0769794A1 publication Critical patent/EP0769794A1/fr
Application granted granted Critical
Publication of EP0769794B1 publication Critical patent/EP0769794B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
    • H01H37/5436—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing mounted on controlled apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/002—Structural combination of a time delay electrothermal relay with an electrothermal protective relay, e.g. a start relay

Definitions

  • the present invention relates to an electrical component protection device.
  • a fixing bolt 51 is provided at an upper portion of an outer surface of a hermetic container 50 which constitutes a casing of the closed type compressor, and the fixing bolt 51 serves to fix a terminal cover 52 to an upper portion of the hermetic container 50 by screwing a nut 53.
  • a through hole 52a which extends vertically and through which the fixing bolt 51 is to penetrate is formed at the terminal cover 52.
  • the hermetic container 50 is provided with a sealed terminal 54, where a portion of the sealed terminal 54 is buried in a hole formed at a top panel of the hermetic container 50 and the other portion is made to protrude outwardly of the hermetic container 50.
  • the sealed terminal 54 has a plurality of connection terminals 55 which protrude upwardly.
  • the terminal cover 52 is formed of a material such as rubber or resin having an electrical insulating property and an elasticity, and it is internally provided with a terminal chamber 56 for housing therein the connection terminals 55 and a protector chamber 58 for housing therein an overload relay 57.
  • a coil spring 59 provided around the overload relay 57 is pressed by a stepped portion 60 of the terminal cover 52, by which the overload relay 57 adheres closely to the upper surface of the hermetic container 50.
  • the coil spring 59 is used as a means for pressing the overload relay 57, and it presses the periphery of the overload relay 57.
  • the operation of force applied from the coil spring 59 does not uniformly exert on the entire periphery of the overload relay 57. Therefore, a sufficient adhesion of the overload relay 57 to the upper surface of the hermetic container 50 cannot be secured, and this has caused a problem that the operation of the overload relay 57 becomes unstable.
  • the coil spring 59 has been used on condition that the overload relay 57 has a circular configuration. Therefore, the spring cannot be used when the relay has an oval configuration, and this means that the structure lacks versatility.
  • the present invention provides a protection device having a terminal cover for housing therein an electrical component and an overload relay, the terminal cover being mounted on an outer surface of an objective equipment to which it is to be mounted, wherein a plurality of ribs which serve as a means for pressing the overload relay against an outer surface of a compressor are formed integrally with the terminal cover on an inner surface of a housing section of the terminal cover for housing therein the overload relay, and the ribs are located in positions symmetrical about a center of the overload relay.
  • the ribs formed integrally with the terminal cover function to press the overload relay. Therefore, in regard to the state of abutment of the overload relay on the outer surface of the objective equipment to which it is to be mounted, the relay abuts with a uniform force on the entire abutment surface. For the above reasons, a sufficient adhesion of the overload relay to the outer surface of the objective equipment to which it is to be mounted can be secured to allow the operation of the overload relay to be stabilized. Furthermore, since the ribs can be arranged in arbitrary positions according to the configuration of the overload relay, there can be achieved a structure having a versatility superior to the prior art structure employing a coil spring.
  • a tip end of each rib fronting the overload relay is formed in an arc configuration.
  • the terminal cover can be set more securely and surely on the overload relay.
  • a retainer bushing having an insulating property and an elasticity is interposed between a top panel of the terminal cover and the overload relay while serving as a means for pressing the overload relay against the outer surface of the compressor.
  • the retainer bushing in a state in which the ribs hold down the periphery of the overload relay, the retainer bushing holds down the center portion of the overload relay.
  • the retainer bushing since the retainer bushing has an elasticity, it does not hinder the pressing operation of the ribs against the overload relay, and both the pressure force of the ribs and the pressure force of the retainer bushing exert effectively on the overload relay.
  • the above arrangement provides an electrical component protection device having a terminal cover in which the overload relay is made to more securely adhere closely to the outer surface of the objective equipment to which it is to be mounted so as to further ensure the operation of the overload relay.
  • a projection having a round tip end is provided on an inner surface of the terminal cover in a position corresponding to a center position of the overload relay, the retainer bushing is provided with a hole to be interlocked with the projection of the terminal cover, and the projection and the hole are interlocked with each other to fix and hold the retainer bushing on the terminal cover.
  • the retainer bushing mounting operation can be achieved with a one-touch motion.
  • the retainer bushing comprises: a base section having a circular peripheral surface configuration corresponding to an inner surface configuration of the terminal cover; a cylindrical pressure section which abuts on the overload relay; a hole which is provided at a tip end of the pressure section and houses therein a nut and a shaft section located in a center position of the overload relay; and a tapered connection section located between the pressure section and the base section.
  • the retainer bushing can be stably held.
  • the pressure section presses the center portion of the overload relay with the nut and shaft section housed in the hole provided at the tip end, and therefore, the overload relay can be stably held down. Since both the base section and the pressure section of the retainer bushing have circular configurations around the axial center, the retainer bushing has no directional property in being mounted to the terminal cover, meaning that it is excellent in workability.
  • a cylindrical hermetic casing 1 is to house therein an electrical compressor body (not shown), and its upper surface is provided with a protection device 2.
  • the protection device 2 is comprised of a terminal cover 3, a shaft section 4 and a nut 5 for fixing the terminal cover 3 on the upper surface of the hermetic casing 1.
  • the terminal cover 3 houses therein a sealed terminal 6 and an overload relay 7.
  • the terminal cover 3 has at its base portion a stepped section 3a corresponding in configuration to the overload relay 7, and a plurality of ribs 8 are integrally formed on an inner surface of the stepped section 3a in order to press the overload relay 7 against an upper surface of the hermetic casing 1 for the achievement of adhesion.
  • the overload relay 7 can be pressedly fixed on the upper surface of the hermetic casing 1 only by the terminal cover 3, so that the reduction in number of components can be achieved, thereby allowing a cast reduction to be achieved.
  • the terminal cover 3 has a housing section 9 for housing the overload relay 7, and the ribs 8 are located in positions symmetrical about the center line of the housing section. With this arrangement, the terminal cover 3 can uniformly press the overload relay 7 against the upper surface of the hermetic casing 1 for the achievement of adhesion.
  • the overload relay 7 can be pressed by providing the ribs 8, however, it is feared that an electrical component such as a lead wire will be possibly damaged by any rib 8 when the overload relay 7 is set on the upper surface of the hermetic casing 1 and then the terminal cover 3 is put on it.
  • each rib 8 is formed into an arc configuration to allow the terminal cover 3 to be set securely and surely in the present invention.
  • the periphery of the overload relay 7 can be made to closely adhere to the upper surface of the compressor body.
  • a retainer bushing 10 made of rubber or the like having an insulating property and an elasticity is interposed between a top panel of the terminal cover 3 and the overload relay 7 while serving as a means for pressing the overload relay 7 against the upper surface of the hermetic casing 1.
  • the retainer bushing 10 presses the overload relay 7 when the terminal cover 3 is set. Therefore, the overload relay 7 and the upper surface of the hermetic casing 1 are made to closely adhere to each other, thereby allowing the operation of the overload relay 7 to be further ensured. In this case, since the retainer bushing 10 has an elasticity, it does not hinder the pressing operation of the ribs 8 against the overload relay 7, and both the pressure force of the ribs 8 and the pressure force of the retainer bushing 10 exert effectively on the overload relay.
  • a projection 11 having a round tip end is provided on the top panel of the housing section 9 of the terminal cover 3, and a hole 12 to be interlocked with the projection 11 is provided in the retainer bushing 10.
  • its base section 10a has a circular peripheral surface configuration corresponding to the inner surface configuration of the terminal cover 3, and a pressure section 10b which is to abut on the overload relay 7 has a cylindrical configuration.
  • the pressure section 10b has at its tip end a hole 10c for housing therein a nut 12 and a shaft section 13 located in the center position of the overload relay 7, and a connection section located between the pressure section 10b and the base section 10a has a tapered configuration.
  • the peripheral surface of the base section 10a of the retainer bushing 10 has a circular configuration corresponding to the inner surface configuration of the terminal cover 3, and therefore, the retainer bushing can be stably held on the terminal cover 3.
  • the pressure section 10b presses the center portion of the overload relay 7 with the nut 12 and shaft section 13 housed in the hole 10c located at its tip end, and therefore, the overload relay 7 can be stably held down. Since both the base section 10a and the pressure section 10b of the retainer bushing 10 have circular configurations around the axial center, the retainer bushing has no directional property in being mounted to the terminal cover 3, meaning that it is excellent in workability.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Casings For Electric Apparatus (AREA)
EP96116493A 1995-10-17 1996-10-15 Dispositif de protection pour composant électrique Expired - Lifetime EP0769794B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP7268206A JPH09112424A (ja) 1995-10-17 1995-10-17 電装部品の保護装置
JP268206/95 1995-10-17
JP26820695 1995-10-17

Publications (2)

Publication Number Publication Date
EP0769794A1 true EP0769794A1 (fr) 1997-04-23
EP0769794B1 EP0769794B1 (fr) 2000-04-26

Family

ID=17455402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116493A Expired - Lifetime EP0769794B1 (fr) 1995-10-17 1996-10-15 Dispositif de protection pour composant électrique

Country Status (6)

Country Link
EP (1) EP0769794B1 (fr)
JP (1) JPH09112424A (fr)
CN (1) CN1078964C (fr)
ES (1) ES2146345T3 (fr)
GR (1) GR3033580T3 (fr)
MY (1) MY116570A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2664796A3 (fr) * 2012-05-17 2016-11-16 Mitsubishi Heavy Industries, Ltd. Compresseur électrique hermétique
US12031535B2 (en) 2019-01-31 2024-07-09 Daikin Industries, Ltd. Compressor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100415817B1 (ko) * 2000-12-07 2004-01-31 삼성전자주식회사 전기제품용 단자장치 보호커버 및 이를 갖춘 압축기 조립체
CN2885311Y (zh) 2006-01-18 2007-04-04 郑成福 经尿道光动力疗法前列腺治疗仪
CN105240245B (zh) * 2015-10-15 2017-08-08 珠海格力电器股份有限公司 一种压缩机端盖及其安装结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2104732A (en) * 1981-08-07 1983-03-09 Aspera Spa Supply and protection unit for a hermetic compressor
US4567390A (en) * 1984-08-02 1986-01-28 Carrier Corporation Internal line break assembly
US4620425A (en) * 1985-08-12 1986-11-04 General Electric Company Thermal protector housing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2104732A (en) * 1981-08-07 1983-03-09 Aspera Spa Supply and protection unit for a hermetic compressor
US4567390A (en) * 1984-08-02 1986-01-28 Carrier Corporation Internal line break assembly
US4620425A (en) * 1985-08-12 1986-11-04 General Electric Company Thermal protector housing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2664796A3 (fr) * 2012-05-17 2016-11-16 Mitsubishi Heavy Industries, Ltd. Compresseur électrique hermétique
US12031535B2 (en) 2019-01-31 2024-07-09 Daikin Industries, Ltd. Compressor

Also Published As

Publication number Publication date
GR3033580T3 (en) 2000-09-29
ES2146345T3 (es) 2000-08-01
JPH09112424A (ja) 1997-05-02
CN1078964C (zh) 2002-02-06
CN1154444A (zh) 1997-07-16
MY116570A (en) 2004-02-28
EP0769794B1 (fr) 2000-04-26

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