EP0395553A1 - Unity composed of an electric circuit for a ventilation hood and of an electric circuit for a cooker - Google Patents

Abstract

The invention concerns a control device for an apparatus of the ventilation hood type, or an equivalent, combined with a cooking apparatus, for example an oven, a cooking surface or a cooking ring. Each control member (CM) of the cooking apparatus is equipped with a means of coupling (FL) placed in series in the supply circuit to the fan motor (FV) by virtue of a means of linking (FL), each of the said means of coupling being provided in order to control the hood through the cooking apparatus. Field of application: domestic electrical. <IMAGE>

Description

The invention relates to a control device for filter block or extractor hood or smoke sensor combined with a cooking station, for example an oven, a hob, a stove.

In the current state of the art, the hood controls are completely independent of those of the cooking station and are generally placed on the hood itself; they include one or two control switches in series with a fan motor speed selector. As an example of the state of the art, reference is made to the wiring diagram (FIG. 1) of a filter hood currently sold by the applicant.

The electrical circuit includes two light bulbs (e), mounted in parallel, a ventilation motor (d), a connection strip (a) and a control panel (f) comprising a double switch (b) and an inverter. special (c).

Power is supplied between neutral and a phase of the 220 V sector via points a1 and a2 of the bar (a). In order to separate the lighting control and the motor control (d), the two lighting and ventilation circuits are connected in parallel on points (a1) and (b2b6) on the one hand, (a1 ) and (b1b5) on the other hand, (b6) and (b5) being bridged. The choice of a ventilation speed is made on the special inverter (c).

On the other hand, there are hoods controlled by a switch functionally independent of the cooking station but placed on the control panel thereof, this is the case of the hood-cover described in patent application FR 2 618 884.

In all cases, the start and stop of the suction process is left to the discretion of the user. Sometimes the latter forgets the hood control, which results either in an accumulation of steam for forgetting to start up, or in excessive consumption and annoyance in noise for forgetting to stop.

In order to remedy these drawbacks, the applicant had the idea of linking the control of the hood to the control of the cooking station and thus posed a new problem and created a new function: the "piloting" of the hood by the cooking station.

In addition, the applicant has sought a device which makes it possible both to create this new function while preserving the independence between the lighting and ventilation functions.

The entire electrical circuit for the hood and the electrical circuit for the cooking station according to the invention comprises in known manner in particular a power supply circuit for the ventilation motor of the hood and a control member associated with each household of the station cooking, and is characterized in that each of said control members is equipped with a coupling means of the type (electrical contact, signal encoder) connected in series in the supply circuit of the ventilation motor by means of connection (g) between the hood and the cooking station, each of said coupling means being provided to close the ventilation circuit when the control member associated with the corresponding cooking station is started, and to open the ventilation upon switching off of said control member.

This assembly according to the invention can have several variant embodiments.

According to a first variant, the electrical circuit of the hood includes a lighting circuit completely independent of the ventilation circuit, in this case a light switch, for example located on the hood allows the start and stop of the lighting whatever the operating status of the fan, this variant requires modification of the standard hood.

According to a second variant, the lighting as well as the ventilation are controlled by the start-up of at least one of the hearths of the cooking station and stopped by cutting off all the hearths.

According to a third variant, which can be associated with one or the other of the two preceding variants, the stopping of the ventilation is deferred with respect to the cutting off of all the control members, by means of a timer or any equivalent means. Said timer also having the function of allowing the start of ventilation when all the fireplaces are off.

• La figure 1 est un schéma de cablage de hotte illustrant l'état de la technique.
• La figure 2 est un schéma de cablage de hotte conforme à l'invention.
• La figure 3 est un schéma de principe du circuit électrique du bandeau de commande d'un poste de cuisson associé au schéma de la figure 2.
• Les figures 4 et 5 sont des tableaux des états de fonctionnement des contacts de la figure 3.
• Les figures 6 et 7 sont des schémas fonctionnels des divers modes de réalisation décrits ci-après.

The invention will be better understood using the description below made with reference to the following appended figures:

• Figure 1 is a hood wiring diagram illustrating the state of the art.
• Figure 2 is a hood wiring diagram according to the invention.
• FIG. 3 is a schematic diagram of the electrical circuit of the control panel of a cooking station associated with the diagram of FIG. 2.
• Figures 4 and 5 are tables of the operating states of the contacts of Figure 3.
• Figures 6 and 7 are block diagrams of the various embodiments described below.

Several alternative embodiments of the invention are described below by way of example.

1st variant:

Reference will first be made to FIG. 3 which represents the wiring of the control panel of a hob with four hearths, the positions of which are referenced on the rectangles referenced (SE, NO, NE, SO). The lines (AA ′, BB ′, CC ′, DD ′, EE ′) use a wiring principle known per se. Each line (AA ′, BB ′) comprises a focal point (KSE, KNO) controlled respectively by a switch (CSE, CNO) whose different contacts are appropriately connected to the terminals (1, 2, 3, 4) of the resistors of the foyer
corresponding. Each line (CC ′, EE ′) comprises a hearth (KNE, KSO) controlled respectively by an energy metering device (DNE, DSO) whose contacts (P1, 2) and (P2, 4) are appropriately connected to the terminals (1, 2, 3, 4) of the resistances of the corresponding hearth. The line (DD ′) includes the additional resistances (KFA) of the hearths (KNE and KSO) whose series connection is controlled by the contacts (DNE, 4A) and (DSO, 4A).

The lines (FF ′) to (KK ′) in the upper part of FIG. 3 are specific to the present invention.

(BBH1, BBH2, BBH3) are the terminals of a connection bar (BBH) of the cooking station. Terminals (BBH1) and (BBH3) are directly connected to lines 2 and 4 (or neutral) in (K) and (K ′). Four contacts (CSE, P3, 5) (DNE, SS) (CNO, P3, 5) (DSO, SS) linked respectively to the home switches or dosers, as well as a timer contact (CMI), are connected in parallel between the points (F, G, H, I, J) of line 2 and the terminal (BBH2).

The timer motor (MI) and a warning light (VS) are connected in parallel between (BBH2) and line 4.

The operating states of all the contacts in Figure 3 are shown in the tables in Figures 4 and 5.

We will now refer to Figure 2. The new electrical circuit of the hood has an unchanged part compared to Figure 1: lighting (e), fan (d), special inverter (c) and l 'double switch (b).

The connection strip (a ′) of the hood has been modified and has three input terminals (a′1, a′2, a′3) instead of two for the strip (a) of Figure 1 and the bridging on the double switch is deleted.

The terminals (a′1, a′2, a′3) are respectively connected to the terminals (BBH3, BBH1, BBH2) of FIG. 3 by any suitable connection means, for example an electric cable (g).

The lighting circuit is connected to the terminals (a′1) and (a′2) of the bar (a ′) and controlled by the contact (b2, b6) of the switch (b).

The ventilation circuit is connected to the terminals (a′1) and (a′3) and controlled by the contact (b1b5) of the switch (b) linked to the special inverter (c).

The modification at the level of the bar (a ′), the addition of the line (a′3, b5) in FIG. 2, and the addition of the lines (FF ′) to (KK ′) of FIG. 3 have for functions on the one hand to link the ventilation control alone, to the start of at least one of the cooking station homes or to the start of the timer, on the other hand to authorize the lighting of the workstation independently of the start of ventilation.

• 1.1. L'utilisateur choisit une vitesse de ventilation sur (c) ce qui ferme le contact (b1, b5).
  Dès que l'un au moins des foyers de cuisson est mis en route, l'un au moins des contacts (CSE, DNE, CNO, DSO) se ferme et la ventilation démarre.
  Inversement dès que les quatre foyers sont tous éteints, et tant que la minuterie n'est pas activée, la ventilation s'arrête. Donc il suffit de laisser en permanence une vitesse de ventilation sélectionnée pour que le démarrage de la ventilation soit automatique dès mise en route de l'un au moins des foyers.
• 1.2. Dans l'hypothèse où l'utilisateur voudrait prolonger la ventilation, après une cuisson, par exemple pour éliminer des vapeurs restantes, il lui suffit d'afficher une durée sur la minuterie MI. La fermeture du contact (CMI) alimentera le ventilateur pendant la durée correspondante.
• 1.3. La commande de l'éclairage se fait par l'interrupteur (b2, b6), l'éclairage peut être utilisé avec ou sans la ventilation. Ceci est par exemple avantageux lorsque l'utilisateur se sert de sa table de cuisson en vitrocéramique comme plan de travail, mais nécessite une modification de la barrette (a′) et l'adjonction du fil (a′3, b5).

The possibilities of this first example of embodiment are mainly:

• 1.1. The user chooses a ventilation speed on (c) which closes the contact (b1, b5).
  As soon as at least one of the cooking zones is switched on, at least one of the contacts (CSE, DNE, CNO, DSO) closes and ventilation starts.
  Conversely, as soon as the four hotplates are all off, and as long as the timer is not activated, the ventilation stops. So it suffices to permanently leave a selected ventilation speed for ventilation to start automatically when at least one of the fireplaces is started.
• 1.2. In the event that the user would like to extend the ventilation, after cooking, for example to eliminate remaining vapors, he only has to display a duration on the MI timer. Closing the contact (CMI) will supply the fan for the corresponding time.
• 1.3. The lighting is controlled by the switch (b2, b6), the lighting can be used with or without ventilation. This is for example advantageous when the user uses his glass ceramic hob as a work surface, but requires a modification of the bar (a ′) and the addition of the wire (a′3, b5).

2nd variant:

The hood used is the standard hood, the wiring of which is that of FIG. 1. The connection means (g) connect the terminals (a1 and a2) of FIG. 1 to the terminals (BBH2 and BBH3) of FIG. 3.

The possibilities of use noted previously 1.1. and 1.2. remain but it is no longer possible to switch on the lighting alone. The advantage of this second example is the use of the standard hood without modification, which can be of industrial and economic interest.

Furthermore, many alternative embodiments can be provided without departing from the scope of the present invention. Among the variants of the connecting means (g) there may be mentioned for example:
- an infrared link which, as soon as a hearth is started in the cooking station, triggers an emission by coded infrared LEDs, picked up by a receiver placed on the hood, then transformed into ventilation working order;
- heat or humidity or pressure detection which starts the hood as soon as a change in heat or humidity is detected;
- a home automation application, where the lines of the sector ensure the transmission of signals to household appliances. In this case, each time a switch in the cooking station is operated, a signal is transmitted to the hood which decodes it and goes into the requested state.
- a remote control variant which starts the cooking station fireplaces and the ventilation.

Examples of cooking stations include:
- a built-in hob called lever, in this case the number of homes varies from 1 to 4, and the control levers for switches and / or energy meters are positioned on the table plan;
- a built-in hob combined with an oven, the controls for the hob including the timer are on the oven strip;
- one or more cooking dominoes placed side by side, such as a fryer, a grill;
- a work station at a restaurant owner or in an industrial kitchen.

Among the variants of the filter block, mention may be made, for example:
- a suction block for industrial kitchens;
- a domino-grill extractor, placed inside the domino;
- an extractor placed below the hob.

Whatever the variants proposed, it can be said that the embodiments explained above operate according to the functional diagrams of FIGS. 7 and 8 where there is in series between a phase and the neutral the control of the cooking station (CM), the connection function (FL), ventilation function (FV). We can for example place the lighting function (FE) in parallel on all three other functions (Figure 6) or in parallel on the ventilation alone (Figure 7), theoretically other variants would still be possible for the lighting function.

In addition, it is possible to place, in parallel on (CM) for example, a function (FD) to delay the execution of the control function of the cooking station (CM).

Claims (9)

1. Assembly composed of an electrical circuit for appliance of the type (extractor hood, filter unit, smoke and odor sensor) and an electrical circuit for cooking station comprising in particular a supply circuit for the ventilation motor of the hood and a control member associated with each hearth of the cooking station, characterized in that each of said control members (CM) is equipped with coupling means (FL) of the type (electrical contact, smell of signals) in series in the ventilation motor supply circuit (FV) by means of a connection means (FL) between the hood and the cooking station, each of said coupling means being designed to close the ventilation circuit when the route of the control member associated with the corresponding cooking station, and to open the ventilation circuit when said control member cuts off. 2. Assembly according to the preceding claim characterized in that each control member (KSE, KNO, KFA, KSO) of the cooking station is equipped with an electrical contact (CSE, DNE, CNO, DSO), the closure and the opening are controlled respectively by starting and cutting the corresponding control member, each electrical contact (CSE, DNE, CNO, DSO) being connected in series in the supply circuit of the ventilation motor by means of link (g). 3. Assembly according to any one of the preceding claims, characterized in that the cooking station also comprises a timer, the contact (CMI) of which is put in series in the supply circuit of the ventilation motor by the connecting means ( g). 4. Assembly according to any one of the preceding claims, characterized in that the electric circuit of the cooking station comprises on the one hand a connection strip (BBH) whose terminals (BBH1) and (BBH3) are connected directly to lines 2 and 4 (or neutral) in (K) and (K ′), and on the other hand four contacts (CSE, P3, 5) (DNE, SS) (CNO, P3, 5) (DSO, SS) linked respectively to control elements (switches, dosers) of the fireplaces, as well as a timer contact (CMI), all connected in parallel between the points (F, G, H, I, J) of line 2 and the terminal (BBH2) . 5. Assembly according to the preceding claim, characterized in that the connection bar (a ′) of the hood has three terminals (a′1, a′2, a′3) connected respectively to the terminals (BB3, BB1, BB2) of Figure 3 by any suitable connection means (g), the lighting circuit being connected to the terminals (a′1) and (a′2) of the bar (a ′) and controlled by the contact (b2, b6 ) of the switch (b), the ventilation circuit being connected to the terminals (a′1) and (a′3) and controlled by the contact (b1b5) of the switch (b) linked to the special inverter (vs). 6. An assembly according to claim 4 characterized in that the hood used is the standard hood, and in that the connecting means (g) connect the terminals (a1) and (a2) of the hood connection strip respectively to terminals (BBH2) and (BBH3) of the connection strip (BBH), the lighting circuit and the ventilation circuit being connected in parallel on terminals (a1) and (a2). 7. Assembly according to any one of the preceding claims, characterized in that the connection means (g) is an infrared connection which, as soon as a hearth of the cooking station is started, triggers an emission by infrared LEDs. coded, and received by a receiver placed on the hood, then transformed into working order of the ventilation. 8. An assembly according to any one of claims 1 to 6 characterized in that the connecting means (g) is a heat or humidity detection means which starts the hood upon detection of a variation in heat or humidity. 9. An assembly according to any one of claims 1 to 6 characterized in that the sector lines ensure the transmission of signals to household appliances. In this case, each time a switch in the cooking station is operated, a signal is transmitted to the hood which decodes it and goes into the requested state.

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