EP0868111A2 - Mikrowellenherd - Google Patents

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Publication number
EP0868111A2
EP0868111A2 EP97305760A EP97305760A EP0868111A2 EP 0868111 A2 EP0868111 A2 EP 0868111A2 EP 97305760 A EP97305760 A EP 97305760A EP 97305760 A EP97305760 A EP 97305760A EP 0868111 A2 EP0868111 A2 EP 0868111A2
Authority
EP
European Patent Office
Prior art keywords
terminals
microwave oven
protective cover
electrical
motor
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.)
Withdrawn
Application number
EP97305760A
Other languages
English (en)
French (fr)
Other versions
EP0868111A3 (de
Inventor
Young-Cheol Go
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP0868111A2 publication Critical patent/EP0868111A2/de
Publication of EP0868111A3 publication Critical patent/EP0868111A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/642—Cooling of the microwave components and related air circulation systems
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord

Definitions

  • the invention relates to a microwave oven including a housing having a cooking chamber and a motor for driving a fan to dissipate heat generated by electrical components, said motor having electrical terminals for connection to a power supply.
  • Microwave ovens are a well known type of cooking appliance in which high frequency microwave energy is absorbed by water and other molecules in food which makes them move at very high speeds to create frictional heat which cooks the product evenly in a short space of time.
  • a fan is installed in the rear portion of the electrical component compartment.
  • the fan is driven by a motor which is supported by a bracket.
  • FIG. 5 A perspective view of a conventional microwave oven having a fan 20 and a motor 30 supported by a bracket 10 is illustrated in Figure 5.
  • the motor 30 which is mounted in the centre of the bracket 10, consists of a stator 32 around which a coil 31 is wound, and a magnetic rotor 33 rotatably mounted on the stator 32.
  • the rotor 33 connected to the fan 20 and facing towards the front of the bracket 10, rotates the fan 20, and terminals 34 are connected to the coil 31.
  • the rotor 33 rotates by its interaction with the current flowing through the coil 31, thereby spinning the fan 20.
  • the bracket 10 supporting these components is mounted to the rear of the electrical component compartment, and one side 11 of the bracket 10 is cut away to enable the power source to be connected to the terminals 34 by means of connectors 50.
  • a particular problem with the type of conventional microwave oven described above is that a person carrying out maintenance on the oven or a microwave oven performance test, may inadvertently come into contact with the terminals 34, either directly or with a tool and may receive an electric shock.
  • a microwave oven according to the present invention is characterised by means for enclosing the electrical terminals.
  • the means for enclosing the electrical terminals is a protective cover which shields the terminals.
  • the protective cover is tapered in length.
  • wires connect the power supply to the motor via the electrical terminals, the protective cover including paths through which the wires pass.
  • each path includes a connector which engages a respective terminal to provide electrical connection therebetween.
  • a microwave oven in accordance with an embodiment of the present invention includes a main body 100 having a cooking chamber 110 and an electrical component compartment 120 therein.
  • a door 111 is hingedly attached to the front of the cooking chamber 110, and a control panel 121 is installed on the front of the electrical component compartment 120.
  • the electrical component compartment 120 includes a transformer 131 to increase the voltage of the electric current provided by an external power source, a storage battery 132 and a magnetron 133 connected to the storage battery 132 to produce high frequencies. These electrical components are connected to the control panel 121.
  • a bracket 140 is mounted on the rear of the main body 100, and a cooling fan 150 and an electric motor 160 for turning the cooling fan 150 are each connected to the bracket 140, which are more fully described below with reference to Figures 2 and 3.
  • the bracket 140 is a hollow case and has a circular rim to surround and protect the fan 150.
  • a plurality of ribs 142 are provided in the centre of the bracket 140 to support the motor 160.
  • the motor 160 includes a stator 162 around which a coil 161 is wound and a rotor 163 to which the fan 150 is connected.
  • the coil 161 is provided with terminals 164 which accept connectors 170 that are linked to the external power source.
  • One side 143 of the bracket is narrower in width than the other to provide a space between the side 143 to which the terminals 164 are facing, and the main body 100 when the bracket 140 is installed. This enables the connectors 170 to be connected to the terminals 163 after the bracket 140 has been fixed to the main body 100.
  • the electric current is supplied to the coil 161
  • the current flowing across the coil 161 causes the rotor 163 to turn, thereby driving the fan 150.
  • the oven also includes a protective cover for preventing the terminals 164 from being exposed and is used to keep a persons fingers or a tool away from the terminals 164 during repair or performance testing of the oven to prevent the possibility of an electric shock.
  • the protective cover 180 consists of a terminal covering portion 181 which encloses the terminals 164, and a terminal guide portion 182.
  • the terminal guide portion 182 includes paths 183, and the protective cover 180 is mounted over the terminals 164 such that the connectors 170 are inserted into their respective paths 183. In case that wires from the power source directly lead to the respective terminals 164, they pass through the paths 183.
  • Part of the terminal covering portion 181 positioned inside the bracket 140 is shorter than that part of it located outside, so that the cost of production is reduced.
  • FIG. 4 An exploded perspective view of a protective cover in accordance with an alternative embodiment of the present invention is illustrated in Figure 4.
  • connectors 170 are integrally coupled to paths 183.
  • connectors or wires are connected to the terminals and the terminals are entirely enclosed by the protective cover to prevent injury caused by coming into contact with the live terminals with a finger or a tool should a person be carrying out maintenance or testing of the oven.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP97305760A 1997-03-26 1997-07-31 Mikrowellenherd Withdrawn EP0868111A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019970010597A KR19980074662A (ko) 1997-03-26 1997-03-26 전자레인지
KR9710597 1997-03-26

Publications (2)

Publication Number Publication Date
EP0868111A2 true EP0868111A2 (de) 1998-09-30
EP0868111A3 EP0868111A3 (de) 1998-10-14

Family

ID=19500860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97305760A Withdrawn EP0868111A3 (de) 1997-03-26 1997-07-31 Mikrowellenherd

Country Status (3)

Country Link
EP (1) EP0868111A3 (de)
JP (1) JPH10267292A (de)
KR (1) KR19980074662A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106368964B (zh) * 2016-11-02 2019-07-30 美的集团股份有限公司 风机组件及具有其的生活电器
CN106438413B (zh) * 2016-11-02 2019-07-30 美的集团股份有限公司 风机组件及具有其的生活电器
CN106438414B (zh) * 2016-11-02 2019-07-30 美的集团股份有限公司 风机组件及具有其的生活电器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1284505B (de) * 1962-02-22 1968-12-05 Simon Hans Anschlusskasten fuer elektrische Geraete
US3518616A (en) * 1968-07-01 1970-06-30 Emerson Electric Co Motor lead connector box
EP0107025A1 (de) * 1982-09-30 1984-05-02 Siemens Aktiengesellschaft Am Ständerblechpaket einer elektrischen Kleinmaschine festlegbare Verbindungs-Vorrichtung und Verfahren zur Herstellung der Verbindungen
DE3608432A1 (de) * 1985-03-14 1986-09-25 Toshiba Kawasaki Kk Mikrowellenherd
GB2267804A (en) * 1992-06-01 1993-12-15 Matsushita Electric Ind Co Ltd Cooling arrangement for a microwave heating device
US5477036A (en) * 1994-05-14 1995-12-19 Daewoo Electronics Co., Ltd. Microwave oven with a cooling arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1284505B (de) * 1962-02-22 1968-12-05 Simon Hans Anschlusskasten fuer elektrische Geraete
US3518616A (en) * 1968-07-01 1970-06-30 Emerson Electric Co Motor lead connector box
EP0107025A1 (de) * 1982-09-30 1984-05-02 Siemens Aktiengesellschaft Am Ständerblechpaket einer elektrischen Kleinmaschine festlegbare Verbindungs-Vorrichtung und Verfahren zur Herstellung der Verbindungen
DE3608432A1 (de) * 1985-03-14 1986-09-25 Toshiba Kawasaki Kk Mikrowellenherd
GB2267804A (en) * 1992-06-01 1993-12-15 Matsushita Electric Ind Co Ltd Cooling arrangement for a microwave heating device
US5477036A (en) * 1994-05-14 1995-12-19 Daewoo Electronics Co., Ltd. Microwave oven with a cooling arrangement

Also Published As

Publication number Publication date
JPH10267292A (ja) 1998-10-09
KR19980074662A (ko) 1998-11-05
EP0868111A3 (de) 1998-10-14

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