EP0868113A2 - Appareil électroménager - Google Patents

Appareil électroménager Download PDF

Info

Publication number
EP0868113A2
EP0868113A2 EP98300523A EP98300523A EP0868113A2 EP 0868113 A2 EP0868113 A2 EP 0868113A2 EP 98300523 A EP98300523 A EP 98300523A EP 98300523 A EP98300523 A EP 98300523A EP 0868113 A2 EP0868113 A2 EP 0868113A2
Authority
EP
European Patent Office
Prior art keywords
fan motor
fan
housing
casing
microwave oven
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Withdrawn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
EP98300523A
Other languages
German (de)
English (en)
Other versions
EP0868113A3 (fr
Inventor
Nam-Sik Jeon
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 EP0868113A2 publication Critical patent/EP0868113A2/fr
Publication of EP0868113A3 publication Critical patent/EP0868113A3/fr
Withdrawn legal-status Critical Current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 present invention relates to an electrical appliance including a housing and a fan casing supporting a motor, the casing being attached to the housing.
  • a microwave oven is a cooking appliance which cooks food using microwave energy which causes molecules within the food to vibrate at high speed to generate heat.
  • a conventional microwave oven is illustrated in Figure 1 and includes an inner case 12 defining a cooking chamber 20, and an outer case 11 forming part of the external housing of the microwave oven. Access to the interior of the cooking chamber 20 is provided by a door 30 hinged to the front of the oven. The front of the oven also includes a control panel 31 to enable various cooking programs and times to be selected.
  • An electrical component compartment is located adjacent to the cooking chamber 20 and contains a magnetron 41 for generating microwave energy, a high voltage transformer 42 for applying a high voltage across the magnetron 41, a fan 43 capable of drawing external air into the electrical component compartment 40 to cool the various electrical components, and a guide duct 44 for directing the air drawn into the electrical component compartment 40 by the fan 43, into the cooking chamber 20.
  • FIG. 2 A perspective view of a conventional fan motor case is illustrated in Figure 2 and consists of a square shaped fan motor guard 51 having a fan motor 45 installed therein, and a cylindrical fan guard portion 52 surrounding the fan 43.
  • the fan motor guard 51 comprises upper and lower panels 54 and 55 and left and right panels 56 and 57. A portion of the left panel 56 is removed to form a cut-out section.
  • a plurality of latticed support members 53 extend between the panels 54,55,56,57 and support the fan 43 and the fan motor 45.
  • a circuit board (not illustrated) is mounted on the upper panel 54 of the fan motor case 50 and supplies rectified current to the electrical components.
  • the circuit board includes a choke coil and a fuse to prevent excessive voltage from reaching the electrical components.
  • a wire 46 which includes a terminal housing 47 provided on its end.
  • the terminal housing 47 is connected to an input terminal 48 provided on the fan motor 45.
  • the wire extends through a slot 58 cut into the left panel 56 of the fan motor case 50 which is secured to the inner surface of the rear wall 13 of inner case 12.
  • a plurality of locking members 59 formed on the edge of the fan motor case 50, are received in through holes 13b formed in the rear wall 13 of the inner case 12 and a plurality of screws 14 are used to fasten the fan motor case 50 to the rear panel 13.
  • a repairman may attempt to carry out repairs whilst the fan motor case is affixed to the rear wall of the inner case by inserting his hand or a tool through the cut-out portion in the left panel 56. This can result in damage being caused to the fan motor and further repairs being required.
  • An electrical appliance according to the present invention is characterised in that the motor can only be accessed by detaching the casing from the housing.
  • the casing and the housing completely enclose and surround the fan motor.
  • the casing includes a front face with openings therein for the passage of air and a peripheral wall depending from the front face having an uninterrupted mating surface in contact with the housing.
  • the elecrical appliance is an oven, especially a microwave oven.
  • microwave oven Although reference is made specifically to a microwave oven, it should be noted that the invention is not limited to microwave ovens and can also be applied to other electrical appliances.
  • the microwave oven comprises an inner case 112 having a cooking chamber 120 and an outer case 111.
  • the cooking chamber 120 is accessible via a door 130 hinged on one side of the front of the microwave oven which also includes a control panel 131 for selecting different cooking programs and times.
  • An electrical component compartment 140 is separated from the cooking chamber 120 by a side wall, and contains a magnetron 141 for generating microwave energy, a high voltage transformer 142 for applying high voltage across the magnetron 141, a fan 143 to cool the various electrical components, and a guide duct 144 to direct a flow of the air drawn into the electrical component compartment 140 by the fan 143 into the cooking chamber 120.
  • the air drawn into the electrical component compartment 140 cools several electrical components emitting heat, and the heat-exchanged air is introduced to the cooking chamber 120 through the guide duct 144 to remove moisture and cooking smells.
  • the fan motor case 150 consists of a square shaped fan motor guard 151 in which a fan motor 145 is mounted, and a cylindrical fan guard 152 surrounding the fan 143.
  • the fan motor guard 151 formed from upper and lower panels 154 and 155 and left and right panels 156 and 157.
  • the fan motor guard 151 supports the fan 143 and fan motor 145 between a plurality of latticed support members.
  • a circuit board (not illustrated) is mounted on the upper panel 154 of the fan motor case 150, and includes a choke coil and a fuse to prevent excessive voltage from being supplied to the electrical components. The circuit board furnishes rectified current to the electrical components in the electrical component compartment 140.
  • the current for driving the fan motor 145 is supplied via a wire 146 having a terminal housing 147 on its end.
  • the wire is coupled via the terminal housing 147 to an input terminal 148 provided on the fan motor 145.
  • the wire extends into the fan motor case 150 via a slot in the left panel 156.
  • the fan motor case 150 is affixed to the inner surface of the rear wall 113 of the inner case 112.
  • a plurality of locking members 159 provided on the upper and lower panels 154 and 155 of the fan motor case 150, are inserted through holes 113b provided in the rear wall 113 corresponding to the locking members 159.
  • a plurality of screws 114 are subsequently inserted into screw holes formed in the fan motor case 150 and the rear wall 113, to retain the fan motor case 150 in position.
  • the magnetron 141 When the microwave oven is operational, the magnetron 141 produces microwave energy which is directed into the cooking chamber 120 to cook the food.
  • the fan motor 145 drives the fan 143 which draws air into the electrical component compartment 140 through a plurality of air holes 113 to cool the electrical components.
  • the heat exchanged air is continuously drawn into the cooking chamber 120 and is subsequently discharged outside to remove moisture and cooking smells.
  • the microwave oven in accordance with the preferred embodiment described above is designed to fully enclose the fan motor to avoid contact with it when electrical components are being repaired and prevent damage to the fan motor.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)
EP98300523A 1997-03-26 1998-01-26 Appareil électroménager Withdrawn EP0868113A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9710606 1997-03-26
KR1019970010606A KR19980074671A (ko) 1997-03-26 1997-03-26 전자렌지의 팬모터 케이스

Publications (2)

Publication Number Publication Date
EP0868113A2 true EP0868113A2 (fr) 1998-09-30
EP0868113A3 EP0868113A3 (fr) 1999-05-26

Family

ID=19500870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98300523A Withdrawn EP0868113A3 (fr) 1997-03-26 1998-01-26 Appareil électroménager

Country Status (3)

Country Link
EP (1) EP0868113A3 (fr)
JP (1) JPH10267288A (fr)
KR (1) KR19980074671A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7326896B2 (en) 2004-09-06 2008-02-05 Samsung Electronics Co., Ltd. Microwave oven

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549055A (en) * 1983-12-12 1985-10-22 Whirlpool Corporation Ventilating means for cooking apparatus
GB2267804A (en) * 1992-06-01 1993-12-15 Matsushita Electric Ind Co Ltd Cooling arrangement for a microwave heating device
JPH0688622A (ja) * 1992-09-09 1994-03-29 Sanyo Electric Co Ltd 電子機器
US5477036A (en) * 1994-05-14 1995-12-19 Daewoo Electronics Co., Ltd. Microwave oven with a cooling arrangement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549055A (en) * 1983-12-12 1985-10-22 Whirlpool Corporation Ventilating means for cooking apparatus
GB2267804A (en) * 1992-06-01 1993-12-15 Matsushita Electric Ind Co Ltd Cooling arrangement for a microwave heating device
JPH0688622A (ja) * 1992-09-09 1994-03-29 Sanyo Electric Co Ltd 電子機器
US5477036A (en) * 1994-05-14 1995-12-19 Daewoo Electronics Co., Ltd. Microwave oven with a cooling arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 352 (M-1631), 4 July 1994 & JP 06 088622 A (SANYO ELECTRIC CO LTD), 29 March 1994 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7326896B2 (en) 2004-09-06 2008-02-05 Samsung Electronics Co., Ltd. Microwave oven

Also Published As

Publication number Publication date
JPH10267288A (ja) 1998-10-09
EP0868113A3 (fr) 1999-05-26
KR19980074671A (ko) 1998-11-05

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