FR2582783A1 - COOKING APPARATUS HAVING A FERMABLE ROOM - Google Patents

Abstract

APPLIANCE WITH A COOKING CHAMBER 2 IN WHICH IS PLACED A HEATING BODY FOR GRILL 5 AND TO WHICH OTHER HEATING DEVICES ARE ASSOCIATED, FOR EXAMPLE HIGH FREQUENCY 6 OR HIGHER OR LOWER HEAT, AND WITH A COOLING BLOWER 7 ASSOCIATED PREFERREDLY TO THE HIGH FREQUENCY GENERATOR 6 FROM WHICH AN AIR CURRENT CONTROLLED BY A REGULATOR 12 AS A FUNCTION OF THE OPERATING MODE CROSSES THE SAID CHAMBER 2. THE REGULATOR 12 IS PLACABLE IN AT LEAST TWO POSITIONS OF ' OPENING ALLOWING A CURRENT OF AIR, ONE OF THEM AFFECTED FOR HIGH FREQUENCY OPERATION, THE SECOND FOR OPERATION IN GRILLING. THE INVENTION ENSURES, IN ALL MODES OF OPERATION, THE EVACUATION OF THE FOG WITH THE REMOVAL OF HUMIDITY ON THE DOOR OF THE COOKING CHAMBER.

Description

COOKING APPARATUS PROVIDED WITH A CLOSABLE ROOM.

  The present invention relates to a cooking apparatus having a closable chamber in which is placed a grill heater and which are associated with other heating devices such as a high frequency heating device and where appropriate the bodies at a higher and / or lower heat, and a cooling fan preferably associated with the high frequency generator from which a stream of air passes through the cooking chamber, the air stream being controllable according to the mode of operation

  of the cooking apparatus by an adjusting member.

  In a known cooking appliance (according to request

  DE-OS 31 44 493), it is found outside

  of the cooking chamber a high-frequency generator

  which is connected to the latter by a waveguide.

  The high frequency generator is associated for its cooling a blower, a portion of the fresh air used for cooling said high frequency generator being introduced into the cooking chamber and preventing, by intense aeration of the chamber, moisture from the product treated in cooking to condense at the entrance of the cooking chamber, in particular on the front glass of the door thereof, in the high frequency operation. The cooling air system is at the same time closable towards the cooking chamber, on the inlet port thereof, depending on the operating mode. An air passage of the cooking chamber is also maintained in the operation

  combined with high frequency energy and thermal energy.

  The subject of the invention is a cooking appliance equipped with different heating systems, in particular with microwave operation and grill operation,

  which is prevented in all modes of

  deterioration of the appliance caused by the condensation

in the cooking chamber.

  This cooking appliance, of the type advertised, is characterized in that the adjusting member is locatable in at least two open positions allowing a stream of air, one of them affected in a known manner in

  high frequency operation, the second to the function

grilling.

  According to other advantageous advantageous features of the invention: the adjustment member is placable in a third open position which is assigned to operation in cooking or raking; the adjusting member at least approximately completely clears the flow section in the open position for high frequency operation, closes it at approximately 30% in the open position for grill operation and closes it at more 90%, preferably more than 95%, in the open position for cooking or raking operation; the cooking chamber has an air inlet opening preceded by a flow channel and an adjusting member and an air outlet opening which gives in a separate outlet channel from the cooling fan and opening directly to the open air; the regulating member, preferably an air valve placed at the inlet of the flow channel coming from the cooling fan and opening into the cooking chamber, is coupled with,

  and operable by, a selector for selecting different

operating modes.

  In practice, it was previously assumed that for the operation of a cooking furnace with conventional heat sources, for example at higher or lower heating or grill heating, it would be disadvantageous to evacuate to the outside by forced ventilation the heat produced inside the oven. However, it now turns out that, at least for the e582783 grill operation, ventilation of the cooking chamber has no adverse effect on the roasting result as regards the quality and time required, because the transmission of heat from the source is mainly by thermal radiation. The invention

  takes advantage of this finding in that, even

  As a standard feature of the cooking appliance, ventilation of the cooking chamber is now carried out, thereby preventing the high moisture vapor forming, especially during roasting, from settling in the cooking chamber. , for example on the door of said chamber or on the joints surrounding this door, the flowing air discharging outwardly said mist. For this purpose, the adjustment member, that is to say for example the air valve, is

  according to the invention in at least two positions of

  Verture. In particular, in the case where, in the cooking appliance cited in the preamble of claim 1, the fogging channel is introduced, inside the apparatus, in an outlet channel leaving the blower and leading directly to the open air and where there is a mixture between the cooling air and the moist mist in this channel, it is advantageous according to the invention to open

  slightly also for cooking or

  the regulator in order to obtain in the flow channel from the fan to the cooking chamber a certain air flow, or a depression, whereby it is avoided that, as a result of overpressure formed in said

  cooking chamber, the mist reaches the drain channel

  and from there to the switch chamber. Such overpressure in the cooking chamber could be caused by the overpressure prevailing on the discharge of the fan and propagating through the steam outlet channel into

this same room.

  The invention will be better understood using the

  detailed description of an embodiment taken as

  non-limiting example and schematically illustrated by the

attached drawing.

  The single figure in this drawing represents the

  parts of the cooking apparatus according to the invention essentially

  for the understanding of the latter. Inside a body 1 is a cooking chamber 2 closable by a door 3 for example foldable. Above the cooking chamber 2 is a bedroom 4 in

  which the control and regulating devices are housed

  the cooking apparatus, equipped with a high-frequency generator for microwave operation as well as heating device ventilation devices described below. The high frequency generator is placed in this chamber 4, which is connected to the cooking chamber 2 by a waveguide also not shown but known per se. The cooking apparatus furthermore has elements of electric resistance heating, for example a grill heater 5. The cooling of the magnetron shown schematically and designated by the reference numeral 6,

  or transformer thereof, is ensured by a suffi-

  flante 7 to which is connected according to the requirements of the technique an air guide 8 from o leave an outlet channel

  9 opening directly to the open air and a listening channel

  11 which opens directly into the cooking chamber 2 being directed obliquely and directly to the door 3 of said chamber. In the bifurcation zone of the two-way air guide is an air valve 12 foldable around an axis of rotation 13. This air valve 12 is connected to a branch 14 'of a return spring 14 established spring loop with the other branch 14 "is fixed.This spring tends to repress the air valve

  12 of the closed position shown in dashed line.

  tinu to the open position in continuous line, in which the latter can come up against a stop 35 not shown. In the open position according to the figure, the two air paths 9 and 11 are open so that the air flow leaving the fan 7 is divided and only a partial amount of it flows to the air duct. flow 11 and to the cooking chamber 2. The air valve 12 has a projecting arm 15 concentric with its axis of rotation 13 and coupled via a spring 16 to a swing lever 18 with two pivotable arms at 17, to which is fixed on the one hand the other end of the spring 16 and which has on the other hand a fork-like fulcrum 19 a pull rod 20. The elements 18 and 20 are part of a lever transmission. This lever transmission is in direct mechanical relation with a control disc 21 permanently connected to a selector, established in a rotating handle, not shown, of the cooking apparatus by which it is possible to adjust to the different modes.

  of operation, for example "operation on micro-

  wave "," grill operation ", and" cooking and raking operation. "On the underside of the ceiling of the cooking chamber 2 is an air outlet opening 22 followed by an outlet channel 23 which, as shown in dashed lines, opens into the outlet channel 9 and the cooling air escaping directly to the open air.It is specially provided that in the case of the

  pure microwave operation, during which the gen-

  The high frequency regulator is only switched on, the regulating member formed of the air valve 12 completely releases the useful section of the flow channel 11, so that there is a current in the cooking chamber 2. relatively air

  strong. This current of air carries the mist coming out of the

  cooking, prevents it from being deposited on the walls of the muffle, especially on the inner face of the door of the cooking chamber, andevacue outwards through the air outlet opening 22 and the channels of Exit 23 and 9/10. In

  combined operation too, with high frequency heating

  Quence and conventional resistance heating, the air valve 12 is in an open position. But just as well in pure grill operation, that is to say after switching on the only grill heater 5,

  it is planned to place by appropriate rotation of the selection

  that is to say by the choice of operating mode "grill" through the aforementioned lever transmission, the air valve 12 in an open position in which it closes the section d about 30% flow

  compared to the full open position of the function-

  high frequency. At the same time, the mist generated in the roasting operation is also discharged to the outside by the air flow, an intimate mixture of the hot mist with the fresh air leaving the fan taking place here also in the channel 9, so that the mixture of exhaust air outlet has only one temperature

  relatively weak. Similarly, in the position of

  In the "cook-roast" mode, the air valve 12 is in an open position, preferably such that it closes the flow section more than 90%. During this mode of operation, a flow of air and a certain overpressure are also obtained in the flow channel 11, which prevents the mist also produced during

  cooking and raking to enter the flow channel

  11 and in the chamber 4. Such an excess pressure is necessary if the air outlet opening 22 offered to the steam is in direct relationship with the outlet channel 9/10

  as seen in the figure. In the absence of this

  pressure, the overpressure established in the outlet channel 9 by the cooling fan 7 could be propagated through the outlet channel into the cooking chamber 2, so that the mist could be discharged inside the

  flow channel 11, which is prevented by the invention.

  The open positions of the air valve 12 assigned to the various operating positions of the selector can be achieved simply by a suitable arrangement of the control disc 21 as it

  Fig.2 in the German patent application DE-OS 33 37 147.

Claims (5)

  1. Cooking apparatus having a closable chamber in which is placed a grill heater and to which other heating devices are associated such as a high-frequency heater and, where appropriate, heating elements. higher and / or lower heat, as well as a cooling fan which is preferably associated with the high frequency generator and from which a stream of air passes through the cooking chamber, the air stream being controllable according to of the operating mode of the apparatus by the adjusting member, a cooking apparatus characterized in that the   setting (12) is locatable in at least two positions of   opening allowing a current of air, one of them affected in known manner to high frequency operation,   the second to grill operation.   2. Cooking appliance according to claim 1,   characterized in that the adjusting member (12) is displaceable in a third open position which is assigned to the   cooking or rinsing operation.   3. Cooking appliance according to claims 1 and 2   characterized in that the adjusting member (12) at least approximately completely releases the flow section in the open position for high frequency operation, closes it at approximately 30% in the open position for   grill operation and closes it to more than 90%, preferably   more than 95%, in the open position to function cooking or raking.   4. Cooking appliance according to any one of   Claims 1 to 3 characterized in that the chamber   for cooking (2) has an air inlet opening preceded by a flow channel (1) and an adjusting member (12) and an air outlet opening (22) which separate output channel (9/10) from   the cooling fan (7) and opening directly to the open air.   5. Cooking appliance according to any one of   Claims 1 to 4 characterized by the fact that   adjusting device (12), preferably an air valve (7) placed at the inlet of the flow channel (11) from the cooling fan (7) and opening into the cooking chamber (2), is coupled with, and operable by, a selector   used to select different modes of operation.