DE20118291U1 - Stove timer with temperature sensor - Google Patents

Description

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AGm 0029 EN
KU/bu

Diehl AKO Foundation & Co. KG, 88239 Wangen Cooker timer with temperature sensor

The invention relates to a stove timer with temperature sensor according to the preamble of claim 1.

Different types of temperature sensors are used to operate oven timers. If the oven timer is to regulate the temperature in an oven, an oven sensor is used. This usually has a sensor element with a positive temperature coefficient (PTC), as is the case with the platinum sensor PT500 that is commonly used in the household goods industry. However, if the oven timer is to monitor the temperature inside a food item (e.g. a roast), a meat skewer is used as the temperature sensor, which is inserted into the food item. Such a meat skewer usually has a sensor element with a negative temperature coefficient (NTC).

Since the evaluation of the temperature signals from PTC and NTC sensors is different, a conventional stove timer can only be used with one of the two types of sensors or temperature probes. This means that a stove timer model must be developed and manufactured for each type of sensor, and the user must decide which temperature probe he wants to use with the stove timer when purchasing. This means a lot of work for the manufacturer and a lack of flexibility for the user.

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Based on the above-mentioned prior art, it is the object of the invention to further develop a stove timer with temperature sensor in such a way that the above-mentioned disadvantages no longer exist.
This object is achieved by a stove timer with temperature sensor, which has the features of claim 1. The subclaims contain embodiments and developments of the invention.

The purpose of the invention is that temperature sensors of different types can be connected to the cooker timer, that the cooker timer is designed in such a way that it can process the signals from the different temperature sensors, and that the setting of the cooker timer to the different temperature sensor types is carried out via a different coding of the plugs of the temperature sensors.

Preferably, the cooker timer can be operated in this way with sensor elements with a negative temperature coefficient (NTC) as well as with those with a positive temperature coefficient (PTC).

In a preferred embodiment, the stove timer can be operated both with an oven sensor and with a meat skewer.

In a further development of the invention, several temperature sensors of different types can be connected to the cooker timer, whereby a selector switch is provided on the cooker timer to select which of the connected temperature sensors should be active and thus deliver the signals for evaluation in the cooker timer.

Furthermore, it is intended that the type of connected or active temperature sensor is displayed on the cooker timer.

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The invention is explained in more detail below using an exemplary embodiment. The only figure shows the front of the oven timer facing the operator.

The stove timer 1 has a display unit 2 and an operating unit 3. The display unit 2 has a display 4 for the time or cooking time, a display 5 for the temperature, a display 6 for the type of connected temperature sensor and displays 7 for the currently set operating mode. The operating unit 3 has a control element 8 for the short-time operating mode, a control element 9 for the cooking time operating mode (setting the start and end time), a control element 10 for the end of cooking mode, a control element 11 for setting the target temperature and a rotary control 12 for changing the respective values.

An oven temperature sensor with a PTC sensor element or a meat skewer temperature sensor with an NTC sensor element can be connected to the stove timer 1. In addition to a clock, the stove timer has a temperature unit that can process signals from both a PTC sensor element and an NTC sensor element and display them on the display 5. The plug of the connected temperature sensor is coded so that the temperature unit can recognize whether a PTC or an NTC sensor is connected, so that the evaluation or processing of the sensor signals from the connected temperature sensor can take place according to its type.

The coding of the plug can be done by the shape of the plug, by lugs or rails, by the arrangement of the plug contacts, by the assignment or non-assignment of the various plug contacts or in other ways.

Furthermore, the cooker timer 1 has a switching unit via which one or more connected consumers are switched on and off directly or by means of intermediate relays.

Connections for connecting the temperature sensor, the consumer(s) and a power supply to the cooker timer 1 are located on the back of the cooker timer 1, which is not visible in the drawing and also not visible to the operator.

It is also conceivable to design the stove timer 1 in such a way that both an oven temperature sensor and a meat skewer temperature sensor can be connected. For this purpose, the stove timer 1 has several temperature sensor connections, whereby the type of temperature sensor connected in each case is again determined via the plug coding. An additional selector switch is required for operation here, which is used to set which of the connected temperature sensors should provide the signals for evaluation in the temperature unit. This selector switch is preferably attached to the front of the stove timer 1 facing the operator.

Claims (5)

1. Cooker timer with temperature sensor, wherein the cooker timer ( 1 ) has a clock, a temperature unit for processing the temperature signals of the temperature sensor, an operating unit ( 3 ), a display unit ( 2 ) for displaying time and temperature values, a switching unit for switching at least one connected consumer on and off and connections for connecting the temperature sensor, the consumer and a power supply, characterized in that
that temperature sensors of different types can be connected to the cooker timer, that the temperature unit of the cooker timer is designed in such a way,
that it can process signals from different types of temperature sensors, that the different types of temperature sensors have differently coded plugs, and that due to the plug coding the temperature unit of the cooker timer can be automatically set to the corresponding type of connected temperature sensor. 2. Cooker timer with temperature sensor according to claim 1, characterized in that the temperature sensor has a sensor element with a negative (NTC) or positive (PTC) temperature coefficient. 3. Cooker timer with temperature sensor according to one of claims 1 or 2, characterized in that an oven sensor or a meat skewer can be used as the temperature sensor. 4. Cooker timer with temperature sensor according to one of claims 1 to 3, characterized in that several temperature sensors can be connected simultaneously, wherein a selector switch is provided on the cooker timer for selecting which of the temperature sensors is to be active. 5. Cooker timer with temperature sensor according to one of claims 1 to 4, characterized in that the type of connected or active temperature sensor can be represented by the display element.