JPH08222362A - Induction heating cooker - Google Patents

Abstract

PURPOSE: To provide an induction heating cooker by which high- or low- temperature cooking can be performed through the determination of the shape of the bottom surface of a cooking pan and overheating can be prevented in the case of high-temperature cooking by providing the cooker with specific constitution. CONSTITUTION: This induction heating cooker is provided with a box-shaped appliance main body 1; a horizontally flat induction coil 3 to be installed in the appliance main body 1; a top plate 5 on the top of the induction coil 3; and a freely rising/falling temperature sensor 10 projecting from the upper surface of the top plate 5 to abut to a cooking pan (high-temperature cooking pan 13, low-temperature cooking pan 15) always placed on the top plate 5. Further, a space S is formed between the bottom surface of the cooking pan 13 and the upper surface of the top plate, and a controlled temperature setting means 16 is provided which, when the temperature sensor 10 is in a high position, sets the temperature controlled by the induction coil 3 to high temperature and which when the sensor 10 is in a low position sets the controlled temperature to low temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic cooker using electromagnetic induction heating.

[0002]

2. Description of the Related Art An electromagnetic cooker for heating a pan made of a magnetic material placed on the upper surface of a plate by an eddy current generated by energizing an induction coil is disclosed in, for example, JP-A-5-29073.
No. 6,086,045.

In such a structure, the temperature of the pan is detected by a temperature sensor which is in close contact with the lower surface of the central portion of the plate, and the alternating current applied to the heating coil is controlled.

In addition, the induction coil has a flat shape corresponding to the plate surface as shown in the above-mentioned prior art, and a little from the lower surface of the plate so as not to be influenced by conduction heat from the plate side. It is arranged with the distance of.

[0005]

However, in the prior art as described above, since the pan that is heated to a high temperature is placed on the top surface of the top plate, the conduction heat of the pan causes the top plate to become a high temperature and the induction coil deteriorates. However, there is a drawback that the control performance is deteriorated.

Therefore, in this prior art, as a countermeasure, it is necessary to lower the control temperature of the pan to suppress the temperature rise on the heating coil side. In this case, the maximum temperature is about 200 degrees, and there is a drawback that cooking of roasted meat or the like, which requires a so-called high temperature (about 250 degrees), cannot be performed.

[0007] By the way, if the surface of grilled meat is heated at a high temperature of about 250 ° C without grilling, the umami of the meat will appear and the meat will have a bad taste.

The present invention is intended to perform general cooking with a low control temperature and cooking requiring a high control temperature.

[0009]

First, the present invention comprises a box-shaped instrument body, a horizontally flat induction coil installed in the instrument body, and a top plate provided on the induction coil. A temperature sensor that protrudes from the top surface of the top plate and is always in contact with a cooking pan placed on the top plate, and is vertically movable, and a space is formed between the bottom surface of the cooking pan and the top surface of the top plate. The control temperature setting means for setting the control temperature by the induction coil high when is in the "high position" and setting the control temperature low by the induction coil when in the "low position" is provided.

Secondly, the present invention provides a sensor position detecting means which is linked to the temperature sensor and detects the rising position of the temperature sensor, and determines the bottom shape of the cooking pot placed on the upper surface of the top plate. Is.

[0011]

According to the present invention, when the temperature sensor protruding from the upper surface of the top plate provided above the induction coil is in the "high position", the control temperature is set high to perform high-temperature cooking such as grilled meat and cooking pot. The space formed between the bottom surface and the top surface of the top plate suppresses the temperature rise of the heating coil.

When the temperature sensor is in the "low position", the control temperature is set low and general cooking such as cooked food is performed.

Further, since the bottom position of the cooking pot is determined by providing a sensor position detecting means for detecting the rising position of the temperature sensor, the bottom of the cooking pot is a flat pot used for cooking stew. Despite that, the control temperature becomes high, and conversely, the control temperature becomes low even though it is a shallow pan (plate) used for grilling meat with so-called ribs formed on the outer periphery of the bottom of the cooking pan. Can be prevented.

[0014]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view of an electromagnetic cooker of the present invention, and FIG. 2 is a side sectional view showing another operating state of the same.

(1) is a box-shaped instrument body having a ring-shaped opening (2) in the upper part and a vent hole (not shown) in the side wall, and (3) is installed in the instrument body With a horizontally flat induction coil placed in the opening (2),
A through hole (4) is provided in the central portion. Reference numeral (5) is a top plate made of ceramic provided on the induction coil (3), and an insertion hole (6) corresponding to the through hole (4).
Is formed.

The top surface of the top plate (5) projects slightly above the upper wall (7) of the instrument body (1).

Reference numeral (8) is a synthetic resin cover provided below the induction coil (3), and reference numeral (9) is a magnetic shielding ferrite provided below the cover.

Reference numeral (10) is a temperature sensor having a thermistor (not shown) provided in the instrument body (1), which penetrates the insertion hole (6) and the through hole (4) and a spring (see FIG. It is urged vertically by a not-shown) so as to project from the upper surface of the top plate (5).

Reference numeral (11) is a sensor position detecting means for detecting an ascending position of the temperature sensor by interlocking with the vertical movement of the temperature sensor (10) by a link lever (12), which is constituted by a micro switch, for example. When the link lever (12) is raised, the micro switch is turned off in the "high position", and when it is lowered, the micro switch is turned on in the "low position".

The sensor position detecting means (11) determines the bottom shape of a cooking pot (described later) placed on the top surface of the top plate (5). (13) is a cooking pot for high-temperature cooking, and as shown in FIG. 1, it has a relatively shallow roasted meat plate shape and is provided with an annular rib (14) projecting downward on the entire outer periphery of its bottom surface. (15) is a cooking pot for general (low temperature) cooking, which has a stewed pot shape as shown in FIG. 2 and has a flat bottom surface.

(16) is a control temperature setting means for controlling the induction coil (3) arranged and fixed in the instrument body (1), such as an inverter circuit for applying an alternating current to the induction coil (3). It also serves as a control circuit (not shown).

Next, the operation will be described. First, a case where high-temperature cooking such as grilled meat is performed will be described with reference to FIG.
When the cooking pot (13) for high temperature is placed on the top surface of the top plate (5), the cooking pot (1
A space (S) for heat insulation is formed between the bottom surface of 3) and the top plate (5).

Therefore, the temperature sensor (10) rises above the top surface of the top plate (5) and its upper end surface abuts the bottom surface of the cooking pot (13) and stops at the "high position".
Since the temperature sensor (10) is in the "high position", the micro switch (11) is turned off, and the OFF signal is input to the control temperature setting means (16) so that the control temperature is up to "250 degrees" suitable for high temperature cooking. Is set to.

In such a state, in order to execute high temperature control, an alternating current is applied to the induction coil (3) by the inverter circuit and the control temperature setting means (16) to heat the grilled meat at a high temperature of 250 degrees.

The case of performing general cooking of simmered food will be described with reference to FIG. When the general-purpose cooking pot (15) is placed on the upper surface of the top plate (5), the entire bottom surface of the cooking pot (15) comes into surface contact with the upper surface of the top plate (5), and the temperature sensor (10). ) Is pushed down by the weight of the cooking pot (15), stops at the "low position", and the micro switch (11) is turned on.

The ON signal of the micro switch (11) is input to the control temperature setting means (16) and the control temperature is set to the maximum "200 degrees" suitable for low temperature cooking.

In such a state, in order to execute the low temperature control, the cooked food is heated by the control temperature setting means (16) at a temperature of about 200 degrees.

[0028]

As described above, according to the present invention, when the temperature sensor is in contact with the bottom surface of the cooking pot and is in the "high position", the control temperature can be set high to perform high-temperature cooking such as grilled meat. The space formed between the bottom surface of the cooking pot and the upper surface of the top plate shields the conduction heat from the cooking pot and prevents the temperature rise of the heating coil and prevents overheating.

Since the sensor position detecting means for detecting the rising position of the temperature sensor is provided, the presence or absence of a space between the bottom surface of the cooking pot placed on the top surface of the top plate and the top plate, that is, the bottom shape of the cooking pot is determined. can do. As a result, even if it is not necessarily a cooking pot for high-temperature cooking designed exclusively for the electromagnetic cooker of the present invention, a commercially available cooking pot having a rib on its bottom surface automatically raises the control temperature. Can be cooked at high temperature.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a main body of an electromagnetic cooker of the present invention when a high-temperature cooking pot is used.

FIG. 2 is a side cross-sectional view of the appliance body when using a general (for low temperature) cooking pot.

[Explanation of symbols]

 1 Instrument Main Body 3 Induction Coil 5 Top Plate 10 Temperature Sensor 11 Sensor Position Detecting Means 13 Cooking Pan (for High Temperature) 15 Cooking Pan (for Low Temperature: General) 16 Controlled Temperature Setting Means

Claims (2)

[Claims] 1. A box-shaped instrument main body, a horizontally flat induction coil installed in the instrument main body, a top plate provided above the induction coil, and a top plate which protrudes from the top surface of the top plate and is always the top. When the temperature sensor that is in contact with the cooking pan placed on the plate and is movable up and down and a space is formed between the bottom surface of the cooking pan and the upper surface of the top plate, and the temperature sensor is in the "high position", the induction is performed. An electromagnetic cooker comprising a control temperature setting means for setting a high control temperature by a coil and setting a low control temperature by the induction coil when in a "low position". 2. A sensor position detecting means for detecting an ascended position of the temperature sensor in cooperation with the temperature sensor is provided.
The electromagnetic cooker according to claim 1, wherein the bottom shape of the cooking pot placed on the upper surface of the top plate is determined.