TWI851127B - IH Cooking Oven - Google Patents

Abstract

An IH cooking stove includes a microcrystalline plate, a heating module, a temperature sensor, an input module, and a control module. The control module is electrically connected to the input module, the temperature sensor, and the heating module, and executes a cooking mode identification procedure when receiving a startup command from the input module. In the cooking mode identification procedure, the control module controls the heating module to continuously heat a cooking utensil on the microcrystalline plate for a predetermined time according to a preset identification power, and when the predetermined time is reached, the control module determines whether the cooking utensil adopts a first cooking mode or a second cooking mode according to a sensor temperature from the temperature sensor and a preset mode threshold.

Description

IH Cooking Oven

The present invention relates to an IH conditioning furnace, and in particular to an IH conditioning furnace adopting a constant temperature detection mechanism.

Existing IH cookers all use the output power as a method of adjusting the firepower. For example, an input button is provided on the surface of the IH cooker to provide the user with input and selection of one of the first to fifth firepowers, and the first to fifth firepowers correspond to output powers of 400W, 800W, 1000W, 1200W, and 1400W, respectively, so that the IH cooker controls the corresponding output power to heat the cooking utensils according to the selection result. In addition, the existing IH cooker also needs the user's input to know the cooking method used by the user, for example, the user selects the corresponding option of frying or deep-frying through the input button. Therefore, whether there are other IH cooking stoves that provide better heating and cooking methods has become a problem to be solved.

Therefore, the object of the present invention is to provide an IH cooker capable of automatically detecting the cooking modes of frying, grilling and frying.

Therefore, the present invention provides an IH cooking furnace, which is suitable for a cooking appliance and includes a microcrystalline plate, a heating module, a temperature sensor, an input module, and a control module. The microcrystalline plate includes an upper surface and a lower surface, and the upper surface is used to set the cooking appliance. The heating module is arranged below the lower surface of the microcrystalline plate and is controlled to heat the cooking appliance with an output power. The temperature sensor is used to detect the temperature of the lower surface of the microcrystalline plate and obtain a sensor temperature. The input module is used to receive a startup command.

The control module is electrically connected to the input module, the temperature sensor, and the heating module, and executes a cooking mode identification procedure when receiving the start-up command from the input module. In the cooking mode identification procedure, the control module controls the heating module to continuously heat the cooking utensil on the microcrystalline plate for a predetermined time according to a preset identification power, and when the predetermined time is reached, determines whether the cooking utensil adopts a first cooking mode or a second cooking mode according to the sensor temperature from the temperature sensor and a preset mode threshold.

In some embodiments, the first cooking method is frying and the second cooking method is deep-frying. When the control module determines that the sensor temperature is less than or equal to the mode threshold when the predetermined time is reached, the first cooking method is determined. When the control module determines that the sensor temperature is greater than the mode threshold when the predetermined time is reached, the second cooking method is determined.

In some embodiments, the mode threshold is 15 degrees Celsius.

In other embodiments, the input module is further used to receive a set temperature instruction, and the set temperature instruction is used to select a set temperature. When the predetermined time is reached, the control module controls the output power of the heating module according to a target temperature that is preset and corresponds to the set temperature, and the sensor temperature, so that the conditioning device substantially reaches the set temperature.

In some embodiments, the control module provides a plurality of temperature options through the input module, so that a user selects one of the isothermal options as the set temperature. The control module also stores the target temperatures corresponding to the first cooking method and the second cooking method and corresponding to the isothermal options, respectively.

In some embodiments, the IH cooking stove further includes a warning module electrically connected to the control module. The temperature options are defined as a first temperature, a second temperature, ..., and an Nth temperature from low to high, respectively, and N is a positive integer greater than 1. In the first cooking mode, when the control module determines that the sensor temperature has reached the target temperature corresponding to the first cooking mode and the set temperature multiplied by a first proportional coefficient preset and corresponding to the first cooking mode, or when the control module determines that the temperature has been reheated to a first heating time corresponding to the first cooking mode and the set temperature since the sensor temperature reached a first temperature threshold corresponding to the first cooking mode and the set temperature, the warning module is controlled to operate to notify the user that the cooking appliance has substantially reached the set temperature.

In some embodiments, in the second cooking method, when the control module determines that the sensor temperature reaches the target temperature corresponding to the second cooking method and the set temperature multiplied by a second proportional coefficient that is preset and corresponds to the second cooking method, and has been reheated to a second heating time corresponding to the second cooking method and the set temperature, the alarm module is controlled to operate to notify the user that the cooking utensil has substantially reached the set temperature.

In some other implementations, the control module stores multiple power options and selects one of the power options as the output power of the heating module. In the cooking method identification procedure, the identified power determined by the control module is equal to the maximum of the power options.

The effect of the present invention is that when the control module receives the start-up command, it first executes the cooking mode identification program to determine whether the cooking appliance adopts the first cooking mode or the second cooking mode according to the sensor temperature of the temperature sensor and the preset mode threshold, thereby realizing an IH cooking stove that can automatically detect the cooking mode.

Before the present invention is described in detail, it should be noted that similar components are represented by the same reference numerals in the following description.

1 and 2, an embodiment of the IH cooking furnace of the present invention is applicable to a cooking device 9 and includes a microcrystalline plate 6, a heating module 2, a temperature sensor 3, an input module 4, a warning module 5, and a control module 1. The warning module 5 is, for example, a buzzer.

The microcrystalline plate 6 includes an upper surface 61 and a lower surface 62, and the upper surface 61 is used to set the cooking utensil 9. The heating module 2 uses the known induction heating technology and is arranged below the lower surface 62 of the microcrystalline plate 6, and is controlled by the control module 1 to heat the cooking utensil 9 with an output power. The temperature sensor 3 is, for example, a resistive temperature sensor and is arranged below the microcrystalline plate 6 to detect the temperature of the center point of the lower surface 62 of the microcrystalline plate 6 to obtain a sensor temperature. The input module 4 is, for example, one or more physical or virtual buttons to receive a start command and a temperature setting command.

The control module 1 is, for example, a microcontroller, and is electrically connected to the input module 4, the temperature sensor 3, the warning module 5, and the heating module 2, and executes a cooking method identification procedure when receiving the start command from the input module 4. In the cooking method identification procedure, the control module 1 controls the output power of the heating module 2 to be equal to the identification power according to a preset identification power, and continuously heats the cooking utensil 9 on the microcrystalline plate 6 for a preset time, and when the preset time is reached, determines whether the cooking utensil 9 adopts a first cooking method or a second cooking method according to the sensor temperature from the temperature sensor 3 and a preset mode threshold. In this embodiment, the first cooking method is frying, and the second cooking method is deep-frying.

Referring to FIG. 3 and FIG. 4 , FIG. 3 illustrates that the cooking device 9 is heated from the 0th second to the 1st minute with the identified power equal to 1400 W without adding oil and in a frying mode, wherein a first curve C1 is the measured temperature of the center point of the upper surface 61 of the cooking device 9, and a second curve C2 is the sensor temperature. FIG. 4 illustrates that the cooking device 9 is heated from the 0th second to the 1st minute with the identified power equal to 1400 W with an appropriate amount of oil added and in a frying mode, wherein a third curve C3 is the measured temperature of the center point of the oil in the cooking device 9, and a fourth curve C4 is the sensor temperature.

As can be seen from FIG. 3 and FIG. 4, the values of the temperature rise of the sensor for frying and deep frying at the first minute are significantly different. Therefore, in this embodiment, the predetermined time is 1 minute and the mode threshold is 15 degrees Celsius. When the control module 1 determines that the sensor temperature is less than or equal to the mode threshold when the predetermined time is reached, the first cooking mode is determined. When the control module 1 determines that the sensor temperature is greater than the mode threshold when the predetermined time is reached, the second cooking mode is determined. However, it should be particularly noted that:

In other embodiments, the predetermined time, the identification power, and the mode threshold may also be other numerical combinations obtained through actual measurements.

Referring to FIG. 1 and FIG. 2 , the control module 1 further provides a plurality of temperature options through the input module 4, so that a user selects one of the temperature options as the set temperature of the set temperature instruction. In this embodiment, the temperature options are defined as a first temperature (i.e., 120 degrees Celsius), a second temperature (i.e., 140 degrees Celsius), a third temperature (i.e., 160 degrees Celsius), a fourth temperature (i.e., 180 degrees Celsius), and a fifth temperature (i.e., 200 degrees Celsius) from low to high. The control module 1 also stores the target temperatures corresponding to the first cooking method and the second cooking method and corresponding to the temperature options. For example, the temperature options for frying are 120 degrees, 140 degrees, 160 degrees, 180 degrees, and 200 degrees, and the corresponding target temperatures are 80 degrees, 85 degrees, 90 degrees, 100 degrees, and 110 degrees, respectively. The temperature options for deep frying are 120 degrees, 140 degrees, 160 degrees, 180 degrees, and 200 degrees, and the corresponding target temperatures are 140 degrees, 155 degrees, 168 degrees, 180 degrees, and 188 degrees, respectively. It should be specifically noted that in other embodiments, the temperature options may also be other temperatures and other quantities.

After the cooking method identification program is completed, that is, when the control module 1 reaches the predetermined time (such as 1 minute), the control module 1 determines the first cooking method or the second cooking method according to the set temperature of the set temperature instruction, and the target temperature corresponding to the set temperature, and then controls the output power of the heating module 2 according to the target temperature and the sensor temperature. In other words, the output power of the heating module 2 is controlled so that when the sensor temperature is equal to the target temperature, the cooking device 9 actually reaches the set temperature, that is, it is close to reaching the set temperature, but it does not have to be exactly equal to the set temperature.

To be more specific, in the first cooking method, when the control module 1 determines that the sensor temperature has reached the target temperature corresponding to the first cooking method and the set temperature multiplied by a first proportional coefficient that is preset and corresponds to the first cooking method, or determines that the sensor temperature has been reheated to a first heating time corresponding to the first cooking method and the set temperature since the sensor temperature reached a first temperature threshold corresponding to the first cooking method and the set temperature, the warning module 5 is controlled to operate (such as making a sound) to notify the user that the cooking utensil 9 has actually reached the set temperature. For example, the first proportional coefficients corresponding to 120 degrees ~ 200 degrees (i.e., five set temperatures) are all 0.8, the first temperature thresholds corresponding to 120 degrees ~ 200 degrees are all 50 degrees Celsius, the first heating times corresponding to 120 degrees ~ 180 degrees (i.e., the first temperature to the fourth temperature) are all 2 minutes, and the first heating time corresponding to 200 degrees (i.e., the fifth temperature) is 3 minutes, but not limited to this.

In the second cooking method, when the control module 1 determines that the sensor temperature has reached the target temperature corresponding to the second cooking method and the set temperature multiplied by a second proportional coefficient that is preset and corresponds to the second cooking method, and has been reheated to reach a second heating time corresponding to the second cooking method and the set temperature, the alarm module 5 is controlled to operate (such as making a sound) to notify the user that the cooking utensil 9 has actually reached the set temperature. For example, the second proportional coefficients corresponding to 120 degrees ~ 200 degrees (i.e., five set temperatures) are all 0.95, the second heating time corresponding to 120 and 140 degrees (i.e., the first temperature and the second temperature) is 2 minutes, the second heating time corresponding to 160 degrees (i.e., the third temperature) is 3 minutes, the second heating time corresponding to 180 degrees (i.e., the fourth temperature) is 5 minutes, and the second heating time corresponding to 200 degrees (i.e., the fifth temperature) is 6 minutes, but the present invention is not limited thereto.

In addition, in this embodiment, the control module 1 also stores a plurality of power options (such as 400W, 800W, 1100W, 1400W), and selects one of the power options as the output power of the heating module 2. In the cooking method identification procedure, the identified power determined by the control module 1 is equal to the maximum of the power options (such as 1400W).

In summary, when the control module 1 receives the start-up command, it first executes the cooking mode identification program to determine whether the cooking appliance 9 adopts the first cooking mode or the second cooking mode according to the sensor temperature of the temperature sensor 3 and the preset mode threshold, thereby realizing an IH cooking stove that can automatically detect the cooking mode. In addition, after the cooking method identification procedure is completed, the control module 1 selects the corresponding target temperature according to the determined cooking method and the set temperature instruction, and then determines when the cooking device 9 actually reaches the set temperature according to the changes in the target temperature and the sensor temperature, and then controls the buzzer to remind the user, so that the purpose of the present invention can be achieved.

However, the above is only an embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the present patent.

1: Control module

2: Heating module

3: Temperature sensor

4: Input module

5: Warning module

6: Microcrystalline board

61: Upper surface

62: Lower surface

9: Cooking utensils

C1~C4: First curve~Fourth curve

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a block diagram illustrating an embodiment of the IH cooking stove of the present invention; and FIG. 2 is a schematic diagram illustrating the relative position of a cooking appliance applicable to the embodiment; FIG. 3 is a timing diagram illustrating the temperature change of a first cooking method of the embodiment; and FIG. 4 is a timing diagram illustrating the temperature change of a second cooking method of the embodiment.

1: Control module

2: Heating module

3: Temperature sensor

4: Input module

5: Warning module

Claims (5)

An IH cooking furnace is suitable for a cooking device and comprises: a microcrystalline plate, including an upper surface and a lower surface, the upper surface is used to set the cooking device; a heating module is arranged below the lower surface of the microcrystalline plate and is controlled to heat the cooking device with an output power; a temperature sensor is used to detect the temperature of the lower surface of the microcrystalline plate to obtain a sensor temperature; an input module is used to receive a start command; and a control module is electrically connected to the input module, the temperature sensor, and The heating module, when receiving the start command from the input module, executes a cooking mode identification procedure, in which the control module controls the heating module to heat the cooking device on the microcrystalline plate continuously for a predetermined time according to a preset identification power, and when the predetermined time is reached, determines whether the cooking device adopts a first cooking mode or a second cooking mode according to the sensor temperature from the temperature sensor and a preset mode threshold. First, the first cooking mode is frying, and the second cooking mode is deep-frying. When the control module determines that the sensor temperature is less than or equal to the mode threshold when the predetermined time is reached, the first cooking mode is determined, and when the control module determines that the sensor temperature is greater than the mode threshold when the predetermined time is reached, the second cooking mode is determined. The control module stores multiple power options and selects one of the power options as the output power of the heating module. In the cooking mode identification process In the sequence, the identified power determined by the control module is equal to the maximum of the power options. The input module is also used to receive a set temperature instruction, which is used to select a set temperature. When the predetermined time is reached, the control module determines the first cooking method or the second cooking method, and a target temperature corresponding to the set temperature. Then, according to the target temperature and the sensor temperature, the output power of the heating module is controlled so that the cooking device substantially reaches the set temperature. An IH cooking furnace as claimed in claim 1, wherein the mode threshold is 15 degrees Celsius. The IH cooking stove as described in claim 1, wherein the control module provides a plurality of temperature options through the input module, so that a user selects one of the isothermal options as the set temperature, and the control module also stores the target temperatures corresponding to the first cooking method and the second cooking method and corresponding to the isothermal options respectively. The IH cooking stove as described in claim 3 further includes an alarm module electrically connected to the control module, wherein the temperature options are defined as a first temperature, a second temperature, ..., and an Nth temperature from low to high, respectively, N being a positive integer greater than 1. In the first cooking mode, when the control module determines that the sensor temperature has reached the target temperature corresponding to the first cooking mode and the set temperature multiplied by a first proportional coefficient preset and corresponding to the first cooking mode, or determines that the sensor temperature has been reheated since reaching a first temperature threshold corresponding to the first cooking mode and the set temperature to reach a first heating time corresponding to the first cooking mode and the set temperature, the alarm module is controlled to operate to notify the user that the cooking appliance has substantially reached the set temperature. An IH cooking stove as described in claim 4, wherein, in the second cooking method, when the control module determines that the sensor temperature has reached the target temperature corresponding to the second cooking method and the set temperature multiplied by a second proportional coefficient that is preset and corresponds to the second cooking method, and has been reheated to reach a second heating time corresponding to the second cooking method and the set temperature, the alarm module is controlled to operate to notify the user that the cooking appliance has actually reached the set temperature.

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