WO2006131454A2

WO2006131454A2 - Gas tap

Info

Publication number: WO2006131454A2
Application number: PCT/EP2006/062670
Authority: WO
Inventors: Bernd MÜHLE; Jörn Naumann
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2005-06-07
Filing date: 2006-05-29
Publication date: 2006-12-14
Also published as: CN101189476B; DE102005026211A1; EP1891376A2; WO2006131454A3; CN101189476A

Abstract

The invention relates to a gas tap for controlling a gas volume flowrate to a gas burner (4) comprising an actuating shaft (10) which rotatably activates the gas volume flowrate and is pressed against a guiding slide (12) of the gas tap for releasing the rotational movement, wherein said guiding slide (12) comprises a first stop (13) restricting the rotatable movement of the actuating shaft (10) to a first operating position in which a minimum gas volume flowrate makes it possible to carry out a reliable ignition. In order to extend the functionality of the gas tap, the guiding slide (12) comprises a second stop (15) restricting the rotational movement of the actuating shaft to a second operating position. .

Description

G ashahn

The present invention relates to a gas tap according to the preamble of claim 1.

Devices for setting an ignition position and for igniting a

Gas cooking appliance are known in many ways. From US 3,676,047 a device is known by means of which the gas flow rate for a gas cooker for certain operating conditions of the gas cooker can be adjusted. For this purpose, the device comprises a rotary switch with which a correspondingly assigned opening state of a gas valve can be set as a function of different rotational positions of the rotary switch and, as a result, the gas flow rate can be selected. Depending on this rotational position, a gas flow rate which is sufficient for igniting a fuel burner or a first stage of the gas cooking appliance can be set at a first rotational position. Starting from this first rotational position can be adjusted by a further rotation of the rotary switch, a second rotational position with which a gas flow rate can be set, which is sufficient for the ignition of a main burner. The device comprises means for stopping the rotary switch at the respectively corresponding rotational position, so that the rotational position to be set is quasi automatically stopped with respect to the gas flow rate for the economy burner or the main burner and thus can be perceived. A major disadvantage of the known device is the fact that no sufficient security can be guaranteed against over-rotation of the corresponding positions and, moreover, the switch is designed only as a rotary switch, thereby also reduced security with regard to the opening of the gas valve is present.

Furthermore, from US 5,525,771 an ignition device for a

Gas burner known, wherein a gas valve can be actuated via a switch and the corresponding gas flow rate can be adjusted by the valve thereby. The device further comprises means for blocking the rotational movement of the switch or the rotary shaft of the gas valve, wherein these means are designed such that they indicate rotational positions of the switch so that they can be perceived by an operator of the rotary switch tactile or tactile. In this regard, a locking lug formed on the rotary shaft engages in a corresponding latching groove when a rotational position of the valve shaft of about 72 ° is reached starting from the zero position, in which respect a nearly fully open valve is characterized. The valve is fully open at a 90 ° rotation position. In a further rotation of the switch or the valve shaft from 90 ° to about 270 ° thereby reducing the gas flow rate is set. In the known device thus only a single detent position of a rotational position is given, in which the gas valve is substantially fully opened and a relatively large amount of gas flows. In addition, to achieve this position a relatively large rotational movement over a relatively large angle required. Another known device is described in US 3,348,561. In this known device, a rotary / push switch is arranged, which can be brought by a mechanical guide device in corresponding positions, these different positions indicate different operating conditions of the gas cooking appliance. In addition to an "off" position, it is also possible to set a second operating position, with which an ignition of a saving operation of the gas burner can be achieved. By further turning or pressing the rotary / push switch, a third operating position can be set, which indicates a main operation of the gas burner. In the various operating positions of the device different gas flow rates are provided, which are sufficient for the respective ignition and the corresponding operating setting of the gas burner. It is in each case a rotation of the rotary / push switch of at least 90 ° required to change to another operating state can. Also in this known device, it is thus relatively expensive to be able to perform a safe and fast setting of operating positions of a gas cooking appliance.

It is therefore an object of the present invention to provide a gas tap for adjusting a gas flow rate, which has a high functionality.

This object is achieved by a gas tap having the features of patent claim 1.

An inventive gas cock can be used to set one each

Ignition position of at least two subregions, i. an internal burner and an external burner, a gas cooking appliance be formed. With the gas valve according to the invention two ignition positions can be characterized by rotational positions of the adjusting element. The gas cock may be configured such that, for setting a first ignition position of a first portion of the gas cooking appliance by pressing a switching shaft of the gas cock in a starting position of the adjusting element, a guide device or guide slot is mechanically coupled. In the following, the terms adjustment element and guide device are used for the terms gas tap and guide slot.

The mechanical coupling is designed such that in a subsequent rotational movement of the adjusting the first firing position at a first rotational position of the adjusting member by an operator of the adjustment haptic is perceived, wherein the first rotational position at an angle less than 90 ° starting from the zero position of the adjustment lies. It can thereby be achieved that the ignition position can be set with the greatest possible safety and accuracy, and the setting of this ignition position can be carried out in a simple manner. The ignition positions therefore no longer need to be searched for themselves, but by the corresponding turning and pressing of the adjusting element, an automatic introduction to the corresponding ignition positions is carried out. Furthermore, it is ensured that an undesired exceeding of a first ignition position can be prevented, whereby an adjustment of an excessively large gas flow rate for a first operating position of the gas cooking appliance can be prevented.

Advantageously, the first firing position of the first portion is predetermined by a stop position of the adjusting element at the first rotational position. This makes it possible to prevent exceeding or over-rotation of the adjusting element even with a relatively fast approach of the adjusting element to the first ignition position and reliable indication of this first ignition position by the operator can be perceived haptically.

It is preferred if the first rotational position of the adjusting element is between 10 ° and 60 °, starting from the zero position of the adjusting element. In a particularly preferred manner, the rotational position of the adjusting element at 40 °, starting from the zero position of the adjusting element. Thus, even with a relatively small rotational movement of the adjusting the first ignition position can be achieved and a relatively large rotational movement of the adjusting element is no longer necessary.

The adjusting member and the guide device may be formed such that, for performing a rotational movement of the adjusting element over the first rotational position, the adjusting element is first pulled out of the depressed position. It can thereby be achieved that starting from the first firing position, which is preferably characterized by a stop position of the adjusting element, further rotation or setting of further firing positions can only be carried out by deliberately moving the adjusting element out of its depressed position by an operator in which the adjusting element is pulled from the pressed position. It may be provided that the path which is traveled when pulling out is smaller than the path that must be performed when pressing the adjustment in its initial position to perform the setting of the first firing position by a subsequent rotation on the pressing movement , By such a combined pushing or pulling movement with a rotary movement or a temporally successive pressing or pulling and turning of the adjusting element, a correspondingly secure setting of the ignition positions can be ensured in a variety of ways, thereby making it possible for the ignition positions or the Reaching the appropriate rotational positions are given securely and can be detected in a simple and secure manner by an operator.

[001 1] It may be provided that the guide device has a guide pin which engages in a sliding guide when the adjustment element is pressed. It can further be provided that the adjusting element and the guide device are designed such that for turning over the first rotational position of the guide pin from the slotted guide is pulled out, in which the adjusting element is pulled out of its depressed position. The guide device is thereby automatically coupled to the adjusting element such that, on the one hand, the achievement of the corresponding ignition positions is predetermined by actuation of the adjusting element and the setting of the corresponding ignition positions can only be achieved by consciously carrying out the corresponding movements of the adjusting element by an operator. This ensures the highest possible safety with regard to the operation of such a device or a gas cooking appliance, in which a device according to the invention is arranged.

Advantageously, the gas cooking appliance has a trained as an inner burner first portion and designed as an outer burner second portion. It can be provided that at least the outer burner is annular and the inner burner is arranged in the interior of the annular outer burner. The inner burner and the outer burner are in particular arranged such that they are positioned centered to a common axis.

It can be provided that a firing position of the second portion of the gas cooking appliance is haptically perceptible at a second rotational position of the adjustment. It can be provided that the second ignition position is predetermined by a second stop position of the setting, wherein the second rotational position, wherein the second firing position is perceived haptic, between 70 ° and 1 10 °, starting from the zero position of the adjustment. In particular, the second rotational position for characterizing the second ignition position of the second subregion of the gas cooking appliance can be at 90 °. It can thereby be achieved that, with a relatively small angular position of the adjusting element, a plurality of ignition positions can be set for different operating states of the gas cooking appliance.

Advantageous embodiments are described in the subclaims.

Further details, features and advantages of the invention will become apparent from an embodiment illustrated in the following drawings. Show it:

Figure 1 shows a device according to the invention in one

Gas cooking appliance;

Figure 2 shows a sequence of movement of a setting element of the device according to the invention; and

Figure 3 is a plan view of a gas cooking appliance.

In the figures, the same or functionally identical elements are provided with the same reference numerals.

In Figure 1, an inventive device 1 for adjusting each of an ignition position of at least two portions of a gas cooking appliance is shown. The device 1 according to the invention is arranged in a gas cooking appliance and has an internal burner (not shown) and an outside burner (not shown) as a first and a second portion of the gas cooking appliance. The device 1 furthermore comprises an adjusting element designed as a rotary / push switch 2. By means of this rotary / push switch 2, the respective ignition positions of the inner burner and the outer burner can be adjusted. The rotary / push switch 2 is fixedly connected to the housing of the gas cooking appliance and freely accessible by an operator of the gas cooking appliance. The rotary / push switch 2 is in the interior of the device 1 with a guide device (not shown) mechanically coupled, wherein the guide device is again designed such that by a corresponding actuation of the rotary / push switch 2, a non-illustrated valve is actuated such that each of the operating position of the rotary / push switch 2 associated gas flow rate can be adjusted. In this regard, the lines shown 3a and 3b lead to a corresponding gas reservoir, such as a gas cylinder, the gas flow through these lines 3a and 3b can be adjusted to the internal burner and the outer burner of the gas cooking appliance by the correspondingly arranged gas valves via the rotary / push switch 2.

The operation of the rotary / push switch 2 shown in Figure 1 or the device according to the invention for adjusting the ignition positions of the inner and outer burner of the gas cooking appliance is explained in more detail below by means of the operating diagram shown in Figure 2. In an initial position of the rotary / push switch 2, which is characterized by a zero position at 0 °, the gas valves of the leads 3a and 3b are closed, so that no gas flow takes place in the direction of the inner and outer burners of the gas cooking appliance. To start up the gas cooking appliance, it is first necessary to press the rotary / push switch 2 in its initial position in the direction of its oriented perpendicular to the plane of the image axis to make a further adjustment of a corresponding ignition position can. By pressing the rotary / push switch 2 to a selected in the embodiment actuating travel of about 5.9 mm engages inside the device 1, a guide pin (not shown) of the guide device in a slotted guide (not shown). This makes it possible that a mechanical coupling of the guide device is achieved and by further actuation of the rotary / push switch 2, an adjustment of the gas valves and thus a gas flow rate can be achieved.

As can be seen from the illustration in Figure 2, is now in this depressed position of the rotary / push switch 2, a rotation from this zero position of 0 ° out possible. To set an ignition position of the internal burner of the rotary / push switch 2 is rotated to a first rotational position, which is at 40 °. In this selected in the exemplary embodiment first rotational position of 40 °, the ignition position of the internal burner of the gas cooking appliance is achieved. In this regard, that is corresponding gas valve by turning the rotary / push switch 2 set such that by the gas valve associated with the gas line 3a and 3b, a gas flow rate can be adjusted, which is sufficient to ignite the internal burner. The internal burner can be considered in this regard as an alternative operating the gas cooker, in which a relatively economical cooking can be achieved with the lowest possible gas consumption.

The inventive device 1 is designed such that the

Achieving this first rotational position at 40 ° and thus the characterization of the first ignition position of the internal burner of the gas cooking appliance for the operator of the rotary / push switch 2 is haptic perceptible. In this regard, the guide device of the device 1 is designed such that upon reaching this first rotational position at 40 °, a stop position of the rotary / push switch 2 is reached and further rotation over this rotational position in the depressed position of the rotary / push switch 2 is not possible , This can be achieved in a simple and safe and low-effort manner that the setting of the ignition position of the internal burner can be done almost automatically. Setting a too large gas flow rate can be safely prevented. In this rotational position of 40 °, the inner burner of the gas cooker is now ignited.

It is desirable that, moreover, the outer burner of the

Gas cooking appliance to be ignited, the device 1 according to the invention is designed such that a further actuation of the rotary / push switch 2 must be performed. In this regard, the device 1 is configured such that further, both turning and pushing or pulling of the rotary / push switch 2 must be performed by the operator. In this regard, it is necessary that the operator, starting from the first rotational position at 40 °, pulls out the rotary / push switch 2 from the depressed position, as shown in Figure 2, to an actuating travel of about 3.6 mm. Thus, the device 1 is designed such that a smaller actuation when pulling out in its first rotational position compared to the actuation of pressing the rotary / push switch 2 must be performed in its initial position to perform a further rotation and adjust another ignition position.

By pulling out the rotary / push switch 2, the guide pin of the guide device is pulled out of the slotted guide, thereby enabling further actuation of the rotary / push switch 2. Starting from this pulled-out position at the first rotational position at 40 °, a second rotational position at about 90 ° can be set such that the rotational ^~ / push switch 2 is pressed simultaneously in the subsequent at least for a certain period of time and rotated. In this regard, the rotary / push switch 2 is again pressed to the initial level of the first pressing operation and simultaneously rotated. In the exemplary embodiment, this takes place up to a rotational position of about 60 °. In the rotational position of about 60 ° has the Turn / push switch 2 in turn reaches its fully depressed position and by a further rotation of the rotary / push switch 2 from 60 ° to about 90 °, the second rotational position is reached, through which the ignition position of the outer burner of the gas cooking appliance is characterized. As can be seen from the illustration in Figure 2, at this second rotational position at 90 ° turn a stop position of the rotary / push switch 2 is formed, whereby this second rotational position by the operator of the rotary / push switch 2 is haptic perceptible. This second ignition position or at this second rotational position of 90 °, a gas flow rate is adjusted by a correspondingly associated valve position, which allows an optimal and economical way igniting the outer burner, so that a safe ignition and burning of the outer burner is possible and at the same time an optimal gas consumption is set.

As can be seen from the illustration in Figure 2, another

Actuate the rotary / push switch 2 over the second rotational position of 90 ° away achieved by, in turn, a pulling out of the rotary / push switch 2 is performed. This extraction movement at the second rotational position is again effected by such an actuation path, as was already carried out when pulling out of the first rotational position at 40 °. In this pulled-out position of the rotary / push switch 2 can now be carried out a further rotation up to a rotational position of about 230 °. In the exemplary embodiment, this rotational position at 230 ° is characteristic of that operating setting of the gas cooking appliance, in which essentially a minimum heating power of the internal burner and the external burner can be set. As can be seen from the illustration in Figure 2, a further actuation of the rotary / push switch 2 can take place over this rotational position of 230 ° away, in which initially takes place a further extraction of the rotary / push switch 2 in the fully extended position. Subsequently, then the rotary / push switch 2 can be rotated to the output rotational position of 360 °. The rotary / push switch 2 then has its starting position or its starting position, which it assumes at 0 ° or its zero position reached.

In Figure 3 is a plan view is shown on a gas cooking appliance, which is designed with 3 burners. Two hotplates are each characterized by an annular structure and a arranged in the interior of the annular structure circle. In the case of the cooking zones, the circular inner area is designed as an internal burner and the annular outer area is designed as an external burner. By way of example, the internal burner is denoted by the reference numeral 4a and the outer burner by the reference numeral 4b for a hotplate. In the exemplary embodiment, the inner burners and the outer burners are arranged symmetrically and centered relative to an axis running perpendicular to the imaging plane through the inner burner 4a. The three gas cookers shown are according to the Explanations to Figure 1 and Figure 2 by the correspondingly assigned rotary / push switch 2a to 2c operated or set the respective ignition positions of the corresponding internal burner 4a and outer burner 4b.

Claims

claims

A gas tap for adjusting a gas flow rate to a gas burner (4) having a switching shaft (10), which adjusts the gas flow by a rotary actuator, and is pressed to release the rotary actuator in abutment with a guide slot (12) of the gas tap, which guide slot (12) with a first stop (13) is formed, which limits a rotational movement of the switching shaft (10) to a first operating position in which a minimum gas volume flow enables reliable ignition, characterized in that the guide slot (12) with a second stop (15 ) is formed, which limits the rotational movement of the switching shaft (10) to a second operating position.

2. Gas tap according to claim 1, characterized in that the first operating position of the switching shaft (10) at an angle of less than 90 °, starting from the zero position of the adjusting element (10).

3. Gas valve according to claim 1 or 2, characterized in that the second operating position of the switching shaft (10) at an angle of approximately 90 °, starting from the zero position of the adjusting element (10).

4. Gas valve according to claim 1, 2 or 3, characterized in that the first operating position of the switching shaft (10) between 10 ° and 60 °, in particular at 40 °, starting from the zero position of the switching element (10).

5. Gas valve according to one of the preceding claims, characterized in that by a release of the switching shaft (10) from its pressure position, the switching shaft (10) overcomes the first and / or second stop (15) of the guide slot (12).

6. Gas valve according to one of the preceding claims, characterized in that the switching shaft (10) has a guide pin (17) which can be brought into contact with the guide slot (12).

7. Gas tap according to one of the preceding claims, characterized in that the gas burner (4) is at least a dual-circuit burner (4a, 4b) with an internal burner and an external burner.

8. Gas valve according to claim 7, characterized in that the first stop (13) limits a rotational movement of the switching shaft (10) to a first operating position, in which a minimum gas volume flow enables reliable ignition of the internal burner.

9. Gas tap according to claim 7 or 8, characterized in that the second stop (15) limits a rotational movement of the switching shaft (10) to a second operating position, in which a minimum gas volume flow enables reliable ignition of the outer burner.