JP2008104626A - Heating device - Google Patents

Abstract

The present invention provides a heating device that is satisfactory for preventing over-baking and cooking deliciously.
SOLUTION: The temperature of the heat generating part can be directly detected, the temperature control of the heat generating part of the heating means for heating the food from below is performed accurately and stably, and the cooking is performed without overcooking the surface of the food. By doing so, a heating device that is excellent in cooking performance, safe and easy to use, and capable of double-sided heating is provided.
[Selection] Figure 1

Description

  The present invention relates to a heating device that accurately controls the temperature of a heating means when cooking food such as meat and fish.

Conventionally, in this type of heating device, for example, an induction heating device, as shown in FIG. 9, 50 is a roaster main body (hereinafter abbreviated as main body) incorporated in kitchen furniture and the like, and the cooking is performed by enamelling the surface inside. A chamber 51 is provided, and a door 52 is attached to the entrance of the cooking chamber 51. A heater 53 is fixed to the upper portion of the cooking chamber 51, and a chimney 54 for discharging steam and smoke generated in the cooking chamber 51 to the outside on the rear wall surface 51a opposite to the entrance of the cooking chamber 51. Is provided facing the rear upper part. The rear wall surface 51 a of the cooking chamber 51 has a temperature sensor 55. The temperature sensor 55 is formed by holding a thermistor covered with an insulating tube with a metal plate such as aluminum, and is fixed to the rear wall surface 51 a of the cooking chamber 51. The temperature sensor 55 is electrically connected to a drive circuit (not shown).
JP-A-7-174345

  However, since the conventional configuration only measures the temperature of the cooking chamber, cooking performance can be relatively ensured for oven cooking, but over-baking while accurately adjusting the temperature for baking cooking. It had the problem that it was not satisfactory to prevent and cook deliciously. For example, in grilling fish, it is almost ideal to bake uniformly at a constant temperature as much as possible, and controlling the heater temperature to a constant temperature is indispensable for cooking fish and other delicious foods. Element.

  In addition, it is not safer against abnormal heating, and when the temperature of the cooking chamber becomes abnormal and the temperature-sensitive operation switch is activated, the heater may be very hot. Had.

  This invention solves the said conventional subject, and it aims at providing the heating apparatus which is excellent in cooking performance, and is easy to use safely.

  In order to solve the above-described conventional problems, the heating device of the present invention includes a mounting table on which a food item is mounted, a tray on which the mounting table is mounted, and a heating chamber in which the cooking object is stored together with the mounting table and the receiving plate. And the heating chamber has a first heating means for heating the food from below, the first heating means has a heat generating portion, and the temperature of the heat generating portion in the vicinity of the rear wall surface of the heating chamber. The heating device has a temperature sensor for detecting contact and a control means, and controls energization via the control means so that the temperature of the temperature sensor becomes a predetermined value.

  Like the said invention, since the temperature of a heat generating part can be detected directly, the temperature control of a heat generating part can be performed correctly and stably. Therefore, in the case of a heating apparatus capable of double-sided baking as in the present invention, in contrast to uniform baking at a constant temperature, which is considered to be an ideal baking method, in the case of grilling fish or the like, the temperature of the first heating means is particularly constant. By controlling the temperature, fish can be cooked deliciously. In addition, the temperature of the heat generating portion can be accurately controlled regardless of the influence of heat conduction from the heat generating portion to the non-heat generating portion and the temperature variation of the non-heat generating portion due to the change in the ambient temperature.

  The heating device of the present invention can directly detect the temperature of the heat generating part, accurately and stably control the temperature of the heat generating part of the heating means for heating the food from below, and overcook the surface of the food. By cooking without heating, it is excellent in cooking performance, safe and easy to use.

  1st invention is the mounting base which mounts a foodstuff, the saucer which mounts the said mounting base, the heating chamber which accommodates the said cooking material with the said mounting base and the said saucer, and the said cooking food in the said heating chamber. A first heating unit that heats from below; the first heating unit includes a heat generation unit and a power supply end; the first heating unit includes a heat generation unit substantially in the vicinity of the power supply end; A heating device that includes a temperature sensor that detects the contact of the temperature and a control unit, and controls the energization through the control unit so that the temperature of the temperature sensor becomes a predetermined value. Since direct detection is possible, temperature control of the heat generating part can be performed accurately and stably.

  In addition, since the temperature sensor is installed at a site away from the food, it is difficult for dirt to adhere due to oil or splashes flowing out from the food, and the detection accuracy of the temperature sensor is unlikely to decrease.

  Therefore, it can be set as the heating apparatus which is excellent in cooking performance, is safe and easy to use, and can perform double-sided heating.

  In addition, since the temperature of the first heating means can be accurately controlled, it can be configured without separating the tray and the first heating means more than necessary, and a wide space in the height direction for storing the food is ensured. be able to.

  According to the second invention, in particular, the first heating means is formed by surrounding the contact portion between the temperature sensor and the heat generating portion in the first invention with a substantially box body and providing a temperature detection space inside the box body. It is possible to minimize the influence on the temperature sensor due to radiant heat from the heater and fluctuations in the temperature in the heating chamber. That is, when it is desired to control the second heating means to a constant temperature while continuously energizing the first heating means, the temperature of the first heating means continues to rise as the heating time elapses, and the temperature sensor It is difficult to accurately measure the temperature of the second heating means. In addition, when the food is being heated, the temperature in the heating chamber may be temporarily lowered due to the influence of water vapor generated from the food, and the temperature detected by the temperature sensor is lowered due to this influence. It is difficult to accurately measure the temperature of the heating means.

  Moreover, since the temperature sensor is surrounded by a box, dirt does not adhere due to oil or splashes flowing out of the food, and the detection accuracy of the temperature sensor does not decrease.

  Therefore, since the temperature of the heating means can be controlled with high accuracy, a heating device that is excellent in cooking performance, safe and easy to use can be obtained.

  According to a third aspect of the present invention, the current interrupting means is provided between the first heating means and the control means, and the current interrupting means is operated. The heating chamber temperature when the energization to the heating means is stopped is set to a value higher than the heating chamber temperature when the energization to the heating means is controlled by the temperature sensor. The means does not operate before the temperature sensor. Further, by controlling the drive circuit using a temperature sensor in which the difference between the ON / OFF temperatures is set small, heating can be performed without deteriorating the cooking performance. Further, when the temperature sensor fails, the current interrupting means operates to stop abnormal heating, and safety can be improved.

  In the fourth aspect of the invention, in particular, by using a heating device that controls the temperature in the heat generating portion of the first heating means in the first invention to 500 ° C. or less, the baking oil is dropped on the heat generating portion of the second heating means. Thus, it is possible to provide a heating device with excellent safety that does not ignite and falls into a tray and does not continue to ignite.

  Moreover, since cooking progresses while gradually transferring heat from the surface to the inside of the cooked product, a large amount of moisture and oil containing the umami component remains in the cooked product, and a heating device with excellent cooking performance can be obtained.

  In the fifth aspect of the invention, in particular, by using a heating device that controls the temperature in the heat generating portion of the first heating means in the first invention to 400 to 500 ° C., baked oil is present in the heat generating portion of the second heating means. It can be set as the heating apparatus excellent in safety | security which ignites when dripped and it falls to a saucer and ignition does not continue.

  In addition, because cooking progresses while gradually transferring heat from the surface to the inside of the food, a large amount of moisture and oil containing umami components remain inside the food, providing excellent cooking performance and shortening the cooking time. It can be.

  According to the sixth aspect of the invention, in particular, the current interrupting means in the third aspect of the invention is a heating device that is an automatic or manual return type thermostat, so that the current is reliably interrupted at a set temperature with a simple configuration. Can do. In addition, since the power supply can be automatically or manually restored, the normal operation can be easily restored when the temperature decreases.

  According to a seventh aspect of the present invention, in particular, the current interrupting means in the third aspect of the present invention is a combination of an automatic reset thermostat and a thermal fuse, and the thermostat is a heating device that responds faster than a thermal fuse, thereby reducing the temperature. If the temperature does not decrease, the temperature of the temperature fuse rises while the thermostat automatically shuts off and returns, and the temperature fuse blows. The current can be reliably cut off.

  According to an eighth aspect of the present invention, there is provided a heating device in which the substantially outer periphery of the box in the second aspect of the invention is covered with a heat insulating material, so that the temperature sensor is based on the radiant heat from the first heating means and the fluctuation of the temperature in the heating chamber. The heating device can be made extremely safe and easy to use because the temperature of the heating means can be accurately controlled.

  In the ninth aspect of the invention, in particular, the temperature sensor in the eighth aspect of the invention is a sheath thermocouple, and the sheath thermocouple tip is a heating device with a black body coating, so that the temperature of the heat generating part can be directly measured. Even in use, the temperature detection accuracy is improved by being excellent in durability and repetitive reliability and effectively receiving radiant heat.

  According to the tenth aspect of the invention, by providing the second heating means for heating from above, it is possible to heat double-sided baking, and the operation of turning the front and back during cooking becomes unnecessary, so that labor can be saved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of a heating device according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of a main part of the heating device according to Embodiment 1 of the present invention.

  In FIG. 1, 1 is a main body of a heating apparatus, and has a heating chamber 3 for baking a cooked product 2 such as fish. Reference numeral 4 denotes a tray 4 housed in the heating chamber 3. A handle 5 is provided at the lower part of the front surface. By operating this handle 5, the inside of the heating chamber 3 is slid back and forth. Reference numeral 6 denotes a grill for placing the food 2, and a first heating means 7 made of a sheathed heater is fixed to the side of the heating chamber 3 on the lower surface of the grill 6. The grill 6 is formed with L-shaped support legs so that the first heating means 7 is wound from the front end portion, and the support legs are placed on the inner bottom surface of the tray 4 and slid back and forth integrally with the tray 4. To do. Reference numeral 8 denotes a second heating means, which is a sheathed heater and is fixed to the upper side surface of the heating chamber 3. An exhaust passage 9 that communicates with the inside of the heating chamber 3 is provided in the upper part of the heating chamber 3, and an exhaust port 10 that communicates with the outside is provided.

  As shown in FIG. 2, the first heating means 7 includes a heat generating portion 11, a non-heat generating portion 12, and a power feeding end portion 13. A temperature sensor 14 is screwed to the heat generating portion 11 near the rear wall surface of the heating chamber 3 of the first heating means 7 by a fixing bracket 15. As the temperature sensor 14, a K-type thermocouple electrically insulated with an insulating material such as ceramics and covered with a metal such as stainless steel was used.

  On the rear wall surface of the heating chamber 3, current interrupting means 16 made of a thermostat having a large on / off width and made of bimetal or the like is attached. The current interrupting means 16, the first heating means 7 and the second heating means 8 are electrically connected in series with a power source (not shown). Here, when the temperature of the temperature sensor 15 reaches a predetermined value, it has a function of controlling energization to the first heating means 7 and the second heating means 8 from a drive circuit (not shown). The temperature in the heating chamber 3 when the interruption means 16 is operated to stop energization of the first heating means 7 and the second heating means 8, and the temperature sensor 14 energizes the first heating means 7. It is set to a value higher than the temperature in the heating chamber 3 at the time of control.

  As described above, the control means 17 is provided to control the temperature related to the temperature sensor 14. In the present embodiment, the temperature of the heat generating portion 11 of the first heating means 7 is adjusted to 500 ° C.

  About the heating apparatus comprised as mentioned above, the operation | movement and effect | action are demonstrated below.

  First, when the user pulls out the handle 5 during grill cooking, the grill 6 and the tray 4 are slid out of the heating chamber 3 in conjunction therewith. Therefore, the food 2 such as fish is placed on the grill 6 and the handle 5 is pushed and slid to be stored in the heating chamber 3. Thereafter, by operating an operation unit (not shown), the first heating means 7 and the second heating means 8 are energized, and heating cooking is started. The cooked food 2 is heated by the first heating means 7 and the second heating means 8, and during this heating, the oil and fat content from the cooked food 2 such as fish baked on the grill 6, that is, the grilled oil A is used. It is dropped from between the grills 6 and stored in the tray 4. Oil smoke U generated by the combustion passes through the exhaust passage 9 in the heating chamber 3 and is exhausted from the main body 1 through the exhaust port 10.

  In grilling fish or the like, the ideal heating method is to bake uniformly at a constant temperature as much as possible. In the case of a heating apparatus capable of double-sided baking as in the present embodiment, the first heating means is particularly used. It is an indispensable element to cook fish etc. deliciously to control the temperature of the heat generating part 11 of 7 to a constant temperature.

  FIG. 3 is a graph comparing the detected temperatures of the temperature sensors in the heating device according to the present embodiment and the conventional one. The heating conditions were performed in a cooking sequence of grilled fish with nothing in the heating chamber 3. In FIG. 3, T2 is the conventional heating apparatus shown in FIG. 9, in which the first heating means is added so that double-side baking can be performed. The temperature of the first heating means is detected by a thermocouple, and the detected temperature is detected. This shows the change over time. T1 indicates a change with time of the temperature sensor 14 in the present embodiment.

  As shown in FIG. 3, in the conventional example, the temperature sensor attached to the rear wall surface of the heating chamber 3 controls the energization to the first and second heating means, so that the temperature of the first heating means is accurate. The temperature cannot be adjusted well. Therefore, in order to color the lower surface of the fish, the baking method is such that the temperature of the first heating means is raised at the initial stage of heating and the temperature is gradually lowered. As described above, in the conventional example, it is impossible to grill the fish uniformly at a constant temperature, and the temperature of the first heating means is raised at the initial stage of heating so that the grilled oil becomes the first heating means. There is a risk of fire if dripped onto the surface.

  On the other hand, in the heating device in the present embodiment, the heating portion 11 of the first heating means 7 is controlled to be about 450 ° C. from the beginning of heating, so that an appropriate baked color is given to the lower surface of the fish to cook deliciously. Yes.

  Here, when the baking oil A was dripped at the 1st heating means 7, there was a possibility of ignition, and the samurai was cooked and compared with the conventional example.

  FIG. 4 is a graph showing the boundaries between the temperature of the tray 4 and the first heating means 7 and the region where the baking oil A may ignite. As shown in FIG. 4, in the region where the temperature of the first heating means 7 is higher than 550 ° C., there is a possibility of catching fire even when the tray 4 is at room temperature, and the temperature of the first heating means 7 is 500 ° C. to 550 ° C. There is a possibility that the temperature of the saucer 4 may ignite in the range of room temperature to 300 ° C., and in the region where the temperature of the first heating means 7 is 500 ° C. or less, ignition occurs when the temperature of the saucer 4 is 300 ° C. or less. There is no possibility to do.

  In actual cooking, since the temperature of the saucer 4 is from room temperature to 300 ° C. or less, the possibility of ignition can be eliminated by adjusting the temperature of the first heating means 7 to 500 ° C. or less.

  In addition, when the temperature of the first heating means 7 is lower than 400 ° C., a sufficient cooking color cannot be obtained in 20 minutes, which is the standard cooking time, and a part that is not sufficiently heated. Is seen.

  Therefore, by adjusting the temperature of the first heating means 7 between 400 ° C. and 500 ° C. according to the type of cooking and cooking time, a heating device with excellent baking performance without ignition is obtained. Can do.

  As described above, in the heating device according to the present embodiment, the temperature of the heat generating part 11 can be directly detected, so that the temperature control of the heat generating part 11 can be performed accurately and stably. In addition, the temperature of the heat generating part can be accurately controlled regardless of the influence of heat conduction from the heat generating part to the non-heat generating part and the temperature fluctuation of the non-heat generating part due to the change in ambient temperature.

  Moreover, since the temperature sensor 14 is installed in a part away from the cooked item, dirt is hardly attached due to oil or splashes flowing out of the cooked item, and the possibility of a decrease in detection accuracy of the temperature sensor 14 is low.

  Therefore, it can be set as the heating apparatus which is excellent in cooking performance, is safe and easy to use, and can perform double-sided heating.

  Moreover, since the temperature of the 1st heating means 7 can be controlled accurately, it can comprise, without separating the receiving tray 4 and the 1st heating means 7 more than necessary, and the space of the height direction which accommodates a foodstuff Widely secured.

  Further, the temperature in the cooking chamber when the current interrupting means 16 is operated to stop energization of the first heating means 7 and the second heating means 8 is detected by the temperature sensor 14. By setting a value higher than the cooking chamber temperature when controlling the energization to the heating means 8, there is no operation prior to the control system of the temperature sensor 14 and the drive circuit. Absent. On the contrary, even if the temperature sensor 14 or the like breaks down, the abnormal temperature rise in the heating chamber 3 is detected by the current interrupting means 16 by bimetal, and the first heating means 7 and the second heating means 8 are energized. Since it can be mechanically stopped, sufficient safety can be secured. Further, the temperature sensor 14 can further improve the cooking performance by reducing the difference between the temperature at which the first heating means 7 and the second heating means 8 are cut off and the temperature at which the temperature is restored by reducing the ON / OFF difference. Is.

  In the heating device in the present embodiment, only the thermostat is used as the current interrupting means. However, this is a combination of an automatic reset thermostat and a thermal fuse, and the thermostat has a faster response than the thermal fuse. Therefore, when the temperature drops, it can be easily returned to normal operation. If the temperature does not drop, the temperature of the temperature fuse rises while the thermostat automatically repeats shutoff and return, and the temperature Since the fuse is blown out, the current can be surely interrupted, and the safety can be further improved.

(Embodiment 2)
FIG. 5 shows a cross-sectional view of the heating device according to Embodiment 2 of the present invention. FIG. 6 is an enlarged view of a main part of the heating device according to Embodiment 2 of the present invention.

  5 and 6, the description of the parts common to the first embodiment is omitted.

  5 and 6, a box 20 is provided so as to surround the temperature sensor 14 attached to the heat generating part 11 near the rear wall surface of the heating chamber 3 of the first heating means 7. The box 20 is made of stainless steel, and is screwed to the rear wall of the heating chamber 3 with two parts, upper and lower.

  In the above configuration, the operation is the same as that of the first embodiment, and thus the description thereof is omitted.

  The effect will be described with reference to FIG.

  FIG. 7 is a graph showing a temperature change of the temperature sensor 14 when the sesame is cooked in the first embodiment and the present embodiment. T3 shows the temperature change of the temperature sensor 14 in the present embodiment, and T4 shows the temperature change of the temperature sensor 14 in the first embodiment.

  As shown in FIG. 7, in the first embodiment, the detected temperature of the temperature sensor 14 is temporarily lowered when about 10 minutes have passed after heating. This is a temporary temperature sensor when the whole sesame is heated to a high temperature and a large amount of water vapor is generated from the sesame and the temperature in the heating chamber 3 decreases due to the heat of vaporization or when baked oil is dripped. This is because the temperature of 14 decreases. On the other hand, it can be seen that the heating device in the present embodiment is hardly affected by these phenomena.

  Therefore, the influence on the temperature sensor due to the radiant heat from the second heating means 8 and the temperature variation in the heating chamber 3 can be minimized.

  Moreover, since the temperature sensor is surrounded by a box, dirt does not adhere due to oil or splashes flowing out of the food, and the detection accuracy of the temperature sensor does not decrease.

  As mentioned above, since the temperature of the 1st heating means 7 can be controlled accurately, it can be set as the heating apparatus which is excellent in cooking performance, and is safe and easy to use.

(Embodiment 3)
FIG. 8 shows an enlarged view of a main part of the heating device according to Embodiment 3 of the present invention.

  In FIG. 8, the description of the parts common to the second embodiment is omitted.

  In FIG. 8, a heat insulating material 30 is provided around the box 20. The heat insulating material 30 is fixing the ceramic paper which consists of a silica and an alumina fiber to the box 20 with the ceramic bond. The surface of the temperature sensor 14 is painted black.

  In the above configuration, the operation is the same as that of the first embodiment, and therefore the description thereof will be omitted.

  By insulating the box 20, the influence on the temperature sensor 14 due to the temperature variation in the heating chamber 3 can be minimized as compared with the heating device in the second embodiment, and the heat radiation is reduced. The temperature rise speed inside the box 20 is increased, and the temperature detection speed of the temperature sensor 14 is also increased. In addition, since the surface of the temperature sensor 14 is painted black, the temperature controllability of the heat generating portion 11 is improved by quickly detecting the temperature fluctuation inside the box 20.

  As mentioned above, since the temperature of a heating means can be controlled more accurately, it can be set as the heating apparatus which is excellent in cooking performance, and is safe and easy to use.

  As described above, since the heating device in the present invention can directly detect the temperature of the heat generating part, the temperature control of the heat generating part can be performed accurately and stably, and the temperature sensor is a part away from the food. Therefore, it is difficult for dirt to adhere due to oil or splashes flowing out of the cooked food, and the possibility that the detection accuracy of the temperature sensor is lowered is low. Therefore, the temperature of the heat generating part can be controlled with high accuracy. Therefore, the temperature control of the heating part of the heating means for heating the food from below is performed accurately and stably, and there is no risk of ignition when baked oil is dripped by controlling this temperature below a predetermined temperature, In addition, since the distance between the tray and the heating means can be maintained as usual, the cooking performance is not impaired, and it is useful as a cooking device such as a roaster, a microwave oven, an oven range, an oven, or a griller.

Sectional drawing of the heating apparatus in Embodiment 1 of this invention The principal part enlarged view of the heating apparatus in Embodiment 1 of this invention The graph which compared the detection temperature of the temperature sensor in the heating apparatus in Embodiment 1 of this invention and the conventional heating apparatus A graph showing the boundaries of areas where baked oil may ignite Sectional drawing of the heating apparatus in Embodiment 2 of this invention The principal part enlarged view of the heating apparatus in Embodiment 2 of this invention The graph which showed the temperature change of the temperature sensor at the time of cooking the sesame in the heating apparatus in Embodiment 2 of this invention and the heating apparatus of Embodiment 1. The principal part enlarged view of the heating apparatus in Embodiment 3 of this invention Diagram showing a conventional heating device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating device 2 Cooked food 3 Heating chamber 4 Receptacle 7 1st heating means 8 2nd heating means 11 Heat generating part 13 Feeding end part 14 Temperature sensor 16 Current interruption means 17 Control means 20 Box 30 Thermal insulation

Claims (10)

A placing table for placing the food, a tray on which the placing table is placed, a heating chamber for storing the cooking material together with the placing table and the receiving plate, and a first heating unit for heating the cooking from below. The first heating means has a heat generating part, has a temperature sensor for detecting the temperature of the heat generating part in the vicinity of the rear wall surface of the heating chamber, and a control means. A heating device that controls energization through the control means so that the temperature of the sensor becomes a predetermined value. The heating apparatus according to claim 1, wherein a contact portion between the temperature sensor and the heat generating portion is surrounded by a substantially box body, and a temperature detection space is provided inside the substantially box body. When the heating device is provided with current interrupting means, and the current interrupting means is connected between the first heating means and the control means, and when the current interrupting means operates to stop energization of the heating means The heating apparatus according to claim 1, wherein the temperature in the heating chamber is set to a value higher than a temperature in the heating chamber when energization of the heating unit is controlled by the temperature sensor. The heating apparatus according to any one of claims 1 to 3, wherein the temperature in the heat generating portion of the first heating means is controlled to 500 ° C or lower. The heating apparatus according to any one of claims 1 to 3, wherein the temperature in the heat generating portion of the first heating means is controlled to 400 to 500 ° C. The heating apparatus according to claim 3, wherein the current interrupting means is an automatic or manual resetting thermostat. The heating apparatus according to claim 3, wherein the current interrupting means is a combination of an automatic reset thermostat and a thermal fuse, and the thermostat is faster in response than the thermal fuse. The heating apparatus according to claim 2, wherein a substantially outer periphery of the box is covered with a heat insulating material. The heating device according to claim 8, wherein the temperature sensor is a sheath thermocouple, and a tip portion of the sheath thermocouple is black-coated. The heating apparatus according to any one of claims 1 to 9, further comprising second heating means for heating from above.