DE102019124744B3 - Cooking appliance - Google Patents

Abstract

A cooking appliance (10) with a crucible (12) and a lid (20) for closing a cooking space (18) in the crucible (12) as well as a pressure release opening (22) on the lid has an electrically actuated valve which is operated by a power storage device in the form of at least one Capacitor, which is integrated into the device, can be opened in an emergency.

Description

The invention relates to a cooking appliance with a crucible and a lid for closing a cooking space in the crucible, as well as a pressure release opening for the cooking space with an electrically operated valve.

Cooking devices with a swiveling pan are also known as tippers, they are all-round devices in which, for example, you can heat, cook, roast or deep-fry. The crucibles are usually pivoted forward towards the operator in order to empty the crucible. The cooking space is optionally closed by a swiveling lid, with a seal usually between the pan and the lid so that an overpressure can prevail in the cooking space.

In order to release this overpressure, for example before opening the cover, there is at least one pressure release opening with an electrically operated valve which is opened at the request of the operator.

The DE 297 19 066 U1 discloses a cooking appliance with a remotely controllable valve that is powered by a battery.

In the DE 35 08 003 A1 describes a cooking device in which a data memory of the cooking device is supplied with emergency power by an energy store in the event of a power failure.

In the DE 10 2011 112 829 A1 a cooking device is shown in which escaping steam is cooled in a quenching box via a valve.

The DE 10 2017 115 556 A1 describes a cooking appliance in which several components are driven by a common drive unit.

The object of the invention is to further optimize the cooking appliance of the type mentioned at the beginning, in particular to further increase the functional reliability.

This is achieved in a cooking appliance of the type mentioned in that an energy store, here preferably a power store, is integrated into the device and coupled to an electrical drive of the valve, the energy store having a capacity that is sufficient for at least one opening process of the valve. The electric drive of the valve is also coupled to the power grid as a device power supply.

The present invention ensures that in the event of a power failure there is still enough energy in the cooking device to lower the pressure in the cooking space to ambient pressure so that the pressure in the cooking space is lowered to ambient pressure, the lid can be opened manually and the food can be removed. This opening of the valve can optionally take place upon actuation by the operator or automatically.

The power store is preferably an electrical power store in the form of at least one capacitor. As an alternative to an electricity storage device, the energy storage device can also be a mechanical energy storage device (spring, hydraulic or pneumatic, magnetic storage device) which opens the valve if the mains voltage fails.

A capacitor is characterized by a more stable long-term capacity compared to a rechargeable battery (accumulator), for example a lithium-ion battery, so that reliability is guaranteed over the service life of the cooking devices.

A further variant of the invention provides that a control is provided which is programmed in such a way that it opens the valve automatically in the event of a failure of the device power supply. This means that the pressure is lowered automatically.

The control of the electrical valve can optionally be designed in such a way that it only opens the valve after a certain downtime, after the power supply has failed, so that brief power failures do not lead to an immediate reduction in pressure, which would massively hinder the cooking process. In this way, a specified downtime can be programmed into the control, which can elapse without actuating the valve.

The controller responsible for the electric valve is designed in such a way that at the start of each pressure cooking process, the integrated, at least one capacitor, which acts as a power storage device in an emergency, is tested once for its functionality, which is done, for example, by the fact that the capacity of the or the capacitors are used for the first movement of the valve.

Since lowering the pressure would possibly set the cooking process back in terms of time or quality and the pressure reduction can have different effects on the cooking process, the downtime after which the valve is only opened can optionally vary depending on the type of cooking process or the progress of the respective cooking process be. For example, there are food that is suddenly depressurized and slowly heats up after a power failure Less tolerable than other food that is only cooked, for example.

According to the preferred embodiment, the valve is a ball valve, that is to say a very robust, simple and reliable valve which is well suited for use in the cooking appliance.

The pressure relief opening is preferably provided in the cover. As an alternative to this, however, it could also be present in the crucible near or at the upper edge.

The valve itself is preferably integrated in the cover, but does not have to be.

A line can lead from the pressure relief opening to a housing outlet on the frame, the outlet optionally being a waste water connection.

A line can also lead from the pressure relief opening to a so-called condensation box, this is a line section in which hot steam coming from the cooking chamber condenses, for example through abrupt expansion and / or wall cooling and / or spraying in water.

Furthermore, at least one pressure sensor is provided, via which the pressure in the cooking space is detected. The cooking process can then be controlled via the existing pressure or the generally known, defined pressure-temperature relationship.

Optionally, the valve can also be controlled via the pressure detected by the pressure sensor, for example to set a specific, desired pressure or to open the valve in the event of excess pressure.

However, for safety reasons, one or more pressure monitors can also be provided to detect a maximum pressure, which, for example, lead to an automatic opening of a valve at 350 mbar inside the closed crucible.

In addition, there can also be a pressure monitor which is intended to detect a minimum pressure, namely a pressure below which the lid can only be opened so that hot steam under pressure does not strike the user when he opens the lid. The electrically actuatable valve, the capacitor (energy store) and also the pressure sensor are preferably integrated into the cover.

Further features and advantages of the invention emerge from the following descriptions and from the following drawings, to which reference is made.

• - 1 eine Variante des erfindungsgemäßen Gargerätes,
• - 2 eine schematische Ansicht des im Deckel des Gargeräts integrierten Ventils samt Druckwächter und Kondensatoren, und
• - 3 eine Seitenansicht des Gargeräts nach 1 mit geöffnetem Installationsfenster im Deckel.

In the drawings show:

• - 1 a variant of the cooking device according to the invention,
• - 2 a schematic view of the valve integrated in the lid of the cooking device, including pressure monitors and capacitors, and
• - 3 a side view of the cooking device according to 1 with the installation window in the lid open.

In 1 is a cooking appliance 10 shown, which can be designed as a table-top cooking device or as a cooking device with an underframe, wherein in 1 the base is not shown.

In the variant shown, the cooking device comprises 10 optional two tiltable crucibles 12 , which are each individually pivotable about a crucible axis. In the situation shown is the right crucible 12 tilted to empty the contents of the crucible.

The present invention is not directed to a cooking appliance with two crucibles 12 limited, but rather it can only be one crucible 12 to be available.

The pivot axis is on a frame 14th attached, in the present case a central web of the frame 14th . There is a control in the housing of the central bar 16 housed, which includes a touch display that can be operated from the outside.

Every crucible 12 defines a so-called cooking space inside 18th , by a pivotable, associated cover 20th can be closed and opened.

The lids 20th can be pivoted manually and / or by an electric motor. On the inside of each of these lids 20th is at least one pressure relief port 22nd provided that is inside the lid 20th leads and thereby in a cover integrated line 24 (please refer 2 ) transforms.

With the variant after 2 are two pressure relief ports 22nd per lid 20th available, each with a line 24 stay in contact. At the end of every line 24 is this to a coupling pipe 26th , in particular a one-piece injection-molded part, coupled, the coupling tube 26th one connection piece for each line 24 may have.

With the inside of the coupling tube 26th are a first pressure switch 28 and a second pressure switch 30th coupled. The pressure switch 28 serves to get a pressure from under a bar, for example 25 millibars to be recorded as the differential pressure between the environment and the cooking chamber 18th with the lid closed 20th .

The pressure switch 30th is used to strike when there is a maximum pressure in the cooking space 18th there is, for safety reasons, the pressure in the cooking chamber 18th should be dismantled immediately.

The coupling pipe 26th stands with a cover integrated cable 32 in connection, in which a valve 34 is integrated, here in the form of a ball valve.

The operation of the valve 34 takes place via an electric drive 36 that in a housing 38 is housed, together with an electrical system, possibly with a controller for direct control of the valve 34 , and with one or more energy stores in the form of capacitors 40 . In the 2 The assembly shown is complete in the respective cover 20th installed, every cover 20th has a corresponding assembly.

The administration 32 then leads through the hollow pivot axis of the lid 20th through into the frame 14th in which the line enters a condensation box 44 leads in which steam condenses, for example by supplying cool water. One from the condensation box 44 discharge line 46 leads to the waste water connection of the cooking appliance 10 .

The flexible line 32 runs, in more detail, preferably immediately after the valve 34 in one piece through the hollow pivot axis, either through the center bar of the frame shown 14th or, if available, through one of the side parts of the frame into or to the condensation box 44 in the rear frame cross member 42 without parts inserted or flanged in between. The hollow interior of the central web or one of the side parts can have an installation space for further electronics contained therein, the line 32 runs through this installation space.

In addition, in the in 2 unit also has a pressure sensor 48 be provided, for example in the coupling pipe 26th opens and the pressure in the cooking space 18th can measure.

The valve 34 is either via the central control 16 controlled or via one in the housing 38 housed control.

How the cooking appliance works is described below.

With the crucible closed 12 this is via its heated floor 50 heated so that the food is also in the pan 12 is heated. When the respective lid 20th is closed, the cooking space is 18th during the cooking process under pressure, preferably the valve 34 in the closed position.

Via the pressure sensor 48 the pressure is permanently monitored so that the cooking process can also be controlled depending on the pressure.

If, contrary to expectations, the pressure in the oven is too high 18th prevail, the pressure switch strikes 30th the one with the central controller 16 or a control in the housing 38 is coupled, and the valve 34 will be opened.

Optionally, however, the valve can also be used below the maximum pressure 34 opened when the pressure is higher than desired for the cooking process.

If there is a power failure, the valve 34 is no longer supplied by the mains voltage, the capacitors work 40 as electricity storage, because its capacity is designed so that it can be used for at least one opening of the valve 34 Can deliver electricity.

The functionality of the capacitors 40 The central control must be checked constantly 16 or the one in the housing 38 optionally provided control designed so that each time a pressure cooking process starts, the capacitors 40 be tested once for functionality by the valve 34 must perform a first movement process, which only energetically via the capacitors 40 is fed, although the mains voltage is available.

In 3 can be seen that the lid 20th an installation space at its rear end close to the pivot axis A 52 has, which can be tightly closed by a flap, not shown.

The installation room 52 and its closure lid extend over the entire width of the lid 20th along its rear edge.

In this installation room 52 are the housing 38 who have favourited Pressure Switches 28 , 30th , the coupling tube 26th and the valve 34 including part of the line 32 housed and accessible from there.

A seal between the top of the respective crucible is not shown 12 and the underside of the associated lid 20th .

The control 16 can also be designed in such a way that it has a motorized opening, possibly also a mechanical opening, of the crucible 12 only allowed if the corresponding pressure switch 28 indicated that the accepted low pressure in the cooking compartment 18th is reached.

Claims (10)

Cooking appliance (10) with a crucible (12) and a lid (20) for closing a cooking space (18) in the crucible (12) and a pressure release opening (22) with an electrically actuated valve (34) emanating from the cooking space (18), wherein an energy storage device is integrated into the device and is coupled to an electric drive (36) of the valve (34), the energy storage device having a capacity which is sufficient for at least one opening process of the valve (34), the electric drive (36) of the valve ( 34) is also coupled to the power grid as a device power supply. Cooking appliance (10) Claim 1 , characterized in that the energy store is at least one capacitor (40). Cooking appliance (10) Claim 2 , characterized in that a control (16) is provided which is programmed in such a way that it opens the valve (34) if the device power supply fails. Cooking appliance (10) Claim 2 or 3 , characterized in that a controller (16) is designed so that at the start of each pressure cooking process, the at least one capacitor (40), which is provided as a power storage device for an emergency, is tested once for its functionality. Cooking appliance 10 according to one of the preceding claims, characterized in that the valve (34) is a ball valve. Cooking appliance 10 according to one of the preceding claims, characterized in that the pressure release opening (22) is provided in the cover (20). Cooking appliance 10 according to one of the preceding claims, characterized in that the valve (34) is integrated in the cover (20). Cooking appliance 10 according to one of the preceding claims, characterized in that a line (24, 32) leads from the pressure release opening (22) to a condensation box (44). Cooking appliance 10 according to one of the preceding claims, characterized in that a line leads from the pressure release opening (22) to a housing outlet on the frame. Cooking device (10) according to one of the Claims 3 to 9 , characterized in that a pressure sensor (48) is provided, via which the pressure in the cooking chamber (18) is detected and which is coupled to the controller (16).

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