FR2656409A1 - HOUSEHOLD APPLIANCE WITH MICROWAVE. - Google Patents

Abstract

The microwave home appliance has a cooling air system associated with the microwave devices. Construction means are provided which divide the cooling air, sucked in by a fan (6), into at least two cooling air flows (12, 13) parallel, of different dosage and associated with elements. Applications: Microwave ovens.

Description

Household appliance at airg-Qud ea

  The invention relates to a household appliance with microwaves, in particular

  a microwave oven with a cooling air system.

  associated with microwave devices By the model

  of German utility G 88 06 276 7 there is known an arrangement which

  door, outside the oven's cooking chamber, a

  cooling air which is connected on the pressure side to a

  exhaust air channel sucked into the atmosphere.

  According to the invention, the height of the connecting mouth

  drainage channel is greater than that of the mouth of the

  outlet of the cooling air blower The mouth of

  is located at the upper limit of the drainage channel of

  the air sucked in, so that below the outlet mouth

  there is an open residual section, into which the outlet of an additional cooling air system, for example a magnetron cooling system, can lead. On the one hand, it is thus taken into account that the flow of outlet air is

  inclined downward, at least in the case of

  Moreover, it is possible to obtain in the exhaust channel an intimate mixture with the hotter suction air stream of the magnetron, and this results in a lower mixing temperature.

  The present invention aims to allow a cooling

  sufficient microwave and electronic devices

  placed next to the microwave devices, without any

  to make major changes to the construction

existing configurations.

  This object is achieved by the fact that construction means are provided which divide the cooling air, sucked by a

  fan, in at least two parallel cooling air flows

  The advantageous embodiment of the invention lies in the fact that, as a means of construction for the distribution of

  cooling is provided a partition wall between a trans-

  high voltage trainer and a switch element on the front.

  According to other embodiments and particular non-limiting aspects of the invention: 1) the fan and the partition wall can produce a cooling air flow for an electronic element; 2) the fan and the partition wall can produce a cooling air flow for the high voltage transformer;

  3) the cooling air flows produced by the ventilation

  can cool together a magnetron; 4) as a means of construction for the distribution of the cooling air streams, the suction surface for each partial air stream may be provided with different perforation patterns; ) the suction surfaces can be arranged in the bottom plate; 6) in the suction surface usable for the cooling air flow of the electronic element, there can be provided a tight perforation pattern, designed for maximum cooling; 7) in the suction surface usable for the cooling air flow of the microwave unit, there may be provided a perforation pattern designed for sufficient cooling; 8) The fan can be a radial fan sucking on

several sides.

  An exemplary embodiment according to the invention is described

  in more detail below using the single figure.

  The figure shows the basic configuration of means of

  construction for the distribution of cooling air flows.

  The overall configuration consists of a switch 1 and a

  switch 2, an electronic clock 3, an electronic unit

  4, a magnetron 5, a fan 6 with a fan wheel 7,

  associated emitter, a high voltage transformer 8, a partition wall 9, an air duct 10, a suspension element

  for the partition wall 9, and the two cooling air flows.

  12 and 13 The arrangement of the partition wall 9 between the high voltage transformer 8 and the switch elements

  facade 1, 2 makes it possible to obtain a part of the cooling air

  suctioned through the bottom plate does not reach directly the cooling fan 6 but passes over the

  the switch facade, up to the suction opening of the

  radial tilator A multitude of holes in the bottom plate (14) in the zone of the components of the switch facade allows to obtain a maximum suction section, while in the rear zone the possibility of direct suction is reduced by in order to guarantee sufficient cooling for the transformer

  high voltage 8 and the magnetron 5 The overall flow of cooling air

  generated by the fan 6 is divided, by means of construction, into a flow of cooling air 12 and a flow

  Cooling air 13 The fan 6 and the separating wall

  9 then produce a cooling air flow 12 for the electronic element 3, 4 and a cooling air flow 13 for the high-voltage transformer 8. For this purpose, the suction surface for each air flow partial is provided with motifs of

  perforations (15) in the suction surface used

  sand for the cooling air flow of the electro-

  3, 4 is arranged a tight pattern of perforations (15), designed for maximum cooling Thus it is guaranteed that the electronic element 3, 4 receives a sufficient supply of cooling air In the suction surface usable for the flow high-voltage transformer cooling air 8 is provided a pattern of perforations designed for sufficient cooling, that is to say that it is sucked just as much air from

  cooling only for cooling.

  At the end of its passage on the electronic unit 4, the flow

  cooling air 12 has a temperature

  above the temperature surrounding the magnetron and is used, together with the cooling air flow 13 having already absorbed the temperature of the high-voltage transformer, for cooling the magnetron 5 According to the position of the air duct 10, a volume more or less air preheated cooling air flows 12, 13 is evacuated, in the form of

  air mixture, in the cooking chamber or in the atmosphere.

- Claims

  1 Microwave household appliance, in particular a micro-oven

  wave, comprising a cooling air system, associated with the microwave devices, characterized in that construction means are provided which divide the cooling air, sucked by a fan (6), into at least two Parallel cooling air flow, different dosing and associated with elements. Apparatus according to claim 1, characterized in that as a construction means for the distribution of the cooling air flow a partition wall (9) is provided between a high-voltage transformer (8) and an element (1, 2) to

switch on the front.

  Apparatus according to claim 1, characterized in that the fan (6) and the partition (9) produce a cooling air flow (12) for an electronic element (3, 4). Apparatus according to Claim 1, characterized in that the fan (6) and the partition (9) produce a cooling air flow (13) for the high transformer.

voltage (8).

  Apparatus according to claims 1, 3 and 4, characterized

  in that the cooling air streams (12, 13) produced

  by the fan (6) together cool a magnetron (5).

  Apparatus according to claims 1 and 2, characterized by

  the fact that, as a means of construction for the distribution of cooling air flows, the suction surface for each partial air flow is provided with perforation patterns (15)

different.

  Apparatus according to claims 1 and 5, characterized by

  the fact that the suction surfaces are arranged in the sheet metal

background (14).

  Apparatus according to claims 1, 3 and 6, characterized

  in that in the suction surface that can be used for the cooling air flow (12) of the electronic element (3, 4),

  there is provided a tight perforation pattern (15) designed for cooling

maximum attenuation.

  Apparatus according to claims 1, 4 and 6, characterized

  in that in the suction surface that can be used for the cooling air flow (13) of the microwave unit (5, 8),

  there is provided a pattern of perforations (15) designed for cooling

enough.

  Apparatus according to claim 1, characterized by the fact

  that the fan (6) is a radial fan sucking on several

sieurs sides.