JP2005351490A - Gas cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably detect the temperature of a cooking container regardless of variation in emissivity of cooking containers. <P>SOLUTION: This gas cooker comprises a gas burner 23 for heating the cooking container 21 in which a cooked material is put, a gas valve 24 for supplying and cutting off a fuel gas to the gas burner, an infrared ray sensor 25 for detecting a temperature of the cooking container 21, and a heating control means 26 for adjusting an opening of the gas valve 24 on the basis of the temperature information from the infrared ray sensor 25 to control the heating quantity on the basis of the supplying quantity of the fuel gas, and the infrared ray sensor 25 is mounted on an approximate center part of the gas burner 23 to detect a temperature of a heating center part of the cooking container 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas cooker used in general homes, offices, restaurants and the like.

  Conventionally, this type of gas cooker is provided with an infrared sensor on the side surface of a cooking vessel, and detects the side temperature of the cooking vessel to control the amount of heating (for example, see Patent Document 1).

  Moreover, it has applied to the induction heating cooking appliance as the temperature detection of the same cooking container (for example, refer patent document 2).

FIG. 12 shows a conventional induction heating cooker described in Patent Document 2. As shown in FIG. As shown in FIG. 12, a top plate 2 on which the cooking container 1 is placed, a heating coil 3 disposed below the top plate 2, and an infrared sensor disposed facing the side surface of the cooking container 1. 4, operating means 5 for operating heating on or off, a control circuit 6 for inductively heating the cooking vessel 1 by applying a high-frequency current to the heating coil 3, and a load for specifying the material of the cooking vessel 1 based on inverter characteristics A detection means 7 and a database 8 for correcting the emissivity of the cooking container 1 based on the temperature signal of the infrared sensor 4 and the signal of the load detection means 7 are provided. When heating is started by pressing the power source or the operation switch of the operation unit 5, a high frequency magnetic field is generated from the heating coil 3 by a signal from the control means 6. The cooking vessel 1 is heated by this high frequency magnetic field and the temperature rises. The load detection means 7 detects whether the cooking container 1 is an iron-based pan, a non-magnetic stainless steel pan, or a pan that cannot be heated based on the inverter characteristic information. Since the emissivity of the cooking container 1 is as high as 0.8 for iron-based materials and as low as 0.1 for non-magnetic stainless steel, there is an error in the temperature value of the infrared sensor. In order to eliminate this error, the database 8 is used to correct the emissivity of the cooking container 1. In the technique disclosed in this document, the emissivity of the cooking container 1 is obtained by the load detection means 7 and the temperature of the infrared sensor 4 is corrected. Thus, the side surface temperature of the cooking container 1 is detected.
JP-A-8-178295 JP 2003-264055 A

  However, in the conventional configuration, since the infrared sensor is disposed on the side surface and is easily affected by disturbance light such as illumination or sunlight, the temperature is affected by disturbance light other than infrared light emitted from the cooking container. It had the subject that it was easy to produce an error in detection.

  The present invention solves the above-mentioned conventional problems, and detects the temperature of the cooking container as a configuration in which an infrared sensor is arranged on the bottom surface of the cooking container to reduce the incident light of disturbance light. In addition, the temperature of the cooking vessel can be detected stably by detecting the bottom temperature of the cooking vessel that is not easily affected by the combustion flame of the gas burner by placing the infrared sensor at the approximate center of the gas burner. The purpose is to provide a gas cooker.

  In order to solve the above-described conventional problems, a gas cooker according to the present invention includes a cooking container for putting a cooked food, a gas burner for heating the cooking container, and a gas for supplying and shutting off fuel gas to the gas burner. Provided with a valve, an infrared sensor for detecting the temperature of the cooking vessel, and a heating control means for adjusting the amount of opening of the gas valve based on temperature information of the infrared sensor and controlling the heating amount by the amount of fuel gas supplied It is.

  In this way, the infrared sensor is disposed substantially at the center of the gas burner to detect the temperature of the heating center of the cooking vessel.

  The gas cooker according to the present invention detects the temperature of the cooking container as a configuration in which an infrared sensor is arranged on the bottom surface of the cooking container to reduce the incident light of the ambient light. Moreover, the temperature of a cooking container can be detected stably by arrange | positioning an infrared sensor in the approximate center part of a gas burner, and detecting the bottom face temperature of the cooking container which is hard to be influenced by the combustion flame of a gas burner.

  A first aspect of the present invention is a cooking container for containing a cooked food, a gas burner for heating the cooking container, a gas valve for supplying and shutting off fuel gas to the gas burner, and an infrared ray for detecting the temperature of the cooking container. By providing a sensor and a heating control means for adjusting the amount of opening of the gas valve by the temperature information of the infrared sensor and controlling the heating amount by the supply amount of the fuel gas, the infrared sensor is disposed at the substantially central portion of the gas burner. It can arrange | position and can detect the temperature of the heating center part of a cooking vessel.

  In the second invention, in particular, the thermal effect of the combustion flame of the gas burner can be reduced by disposing the infrared sensor of the first invention below the combustion flame of the gas burner.

  According to the third aspect of the invention, in particular, the thermal effect of the combustion flame of the gas burner can be reduced by providing the infrared sensor of the first or second aspect of the invention with a heat insulating means that blocks heat from the surroundings.

  According to a fourth aspect of the invention, in particular, the heating control means of any one of the first to third aspects is provided with a rice cooking control means for storing the heating amount of the rice cooking process, so that the rice cooking control means boils the cooking container. The emissivity of the cooking container can be corrected by determining the temperature of the infrared sensor and determining the cooking temperature when stable.

  In the fifth aspect of the invention, in particular, the rice cooking control means of the fourth aspect of the invention can be cooked with a heating amount suitable for the total number by providing a total number input means for inputting the amount of rice.

  6th invention provides especially the rice cooking control means of any one of 4th-5th invention by providing rice cooking remaining time display means which displays progress of rice cooking time, and when cooking is completed, remaining time is shown. Accurate remaining time display can be made to confirm.

  In the seventh aspect of the invention, in particular, the rice cooking control means of any one of the fourth to sixth aspects is provided with an operation means including an operation switch, so that when the operation switch is input during rice cooking, the combined input is performed. The total number set by the means can be displayed to notify the user.

  In the eighth invention, in particular, the rice cooking control means according to any one of the fourth to seventh inventions is provided with a total number storage means for storing the information of the total number input means, so that the combination used last time when the power is turned on again. By displaying the number, the usability can be improved.

  In the ninth aspect of the invention, in particular, the heating means or the rice cooking control means of any one of the first to eighth aspects of the invention is used to determine the non-conforming pan of the infrared sensor using the infrared sensor temperature when the cooking vessel is boiled. By providing the determination means, it is possible to notify the user when the emissivity of the cooking container is low.

  In the tenth aspect of the invention, in particular, the heating means or the rice cooking control means of the ninth aspect of the invention is provided with abnormality notification means for notifying abnormality of the infrared sensor so as to notify the abnormality notification at the end of cooking. Convenience has been improved as a cooker that can complete cooking of rice and edible for automatic cooking.

  In the eleventh aspect of the invention, in particular, the infrared sensor of any one of the first to tenth aspects of the invention is consumed by the infrared sensor during cooking by providing intermittent power supply control means for intermittently supplying power for driving the infrared sensor. Current consumption can be reduced.

  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 gas cooker according to Embodiment 1 of the present invention.

  In FIG. 1, a cooking container 21 for containing a cooked food, a gotok 22 for placing the cooking container, a gas burner 23 for heating the cooking container 21, and a gas valve 24 for supplying and blocking fuel gas to the gas burner 23. And an infrared sensor 25 for detecting the temperature of the cooking vessel 21 and a heating control means 26 for adjusting the opening amount of the gas valve 24 according to the temperature information of the infrared sensor 25 and controlling the heating amount by the supply amount of the fuel gas. Yes.

  The infrared sensor 25 is arranged at a substantially central portion of the gas burner 23 and is a temperature detection element made of a thermopile. The infrared sensor 25 detects infrared rays emitted from the bottom surface of the cooking vessel 21 to detect the temperature of the cooking vessel.

  The infrared sensor 25 only needs to be able to detect the temperature of the cooking vessel 21. For example, a temperature detection element such as a pyroelectric element, germanium, or photodiode can be used. Moreover, although the infrared sensor 25 is provided in the center part of the mounting part of the cooking vessel 21, it should just detect the temperature of the cooking vessel 21, and is not restricted to the structure of a present Example. Further, a plurality of infrared sensors 25 may be provided to detect the temperature of the cooking container 21 so that the temperature distribution of the cooking container 21 can be detected and the temperature of the cooking container 21 can be controlled with higher accuracy. .

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when a power supply (not shown) is turned on and cooking is started by the operation switch, the heating control means 26 opens the gas valve 24 and supplies combustion gas to the gas burner 23. When the combustion gas is supplied to the gas burner 23, the combustion gas is ignited by ignition means (not shown) and combustion is started. By this combustion, the temperature of the cooking vessel 21 placed on the gotok 22 rises, and the object to be heated in the cooking vessel 21 is cooked. At this time, the heating control means 26 can grasp the progress of cooking of the object to be heated based on the temperature information from the infrared sensor 25 and adjust the opening amount of the gas valve 24 according to the progress of cooking to adjust the gas burner 23. It adjusts the combustion gas supplied to. Thus, the food to be cooked in the cooking container 21 is cooked.

  The infrared sensor 25 is configured by an infrared sensor made of a thermopile and detects thermal energy radiated from the bottom surface of the cooking vessel 21. The infrared sensor 25 calculates the temperature of the cooking vessel 21 by changing the amount of light, which is thermal energy, into current or voltage. As described above, since the infrared sensor 25 detects the bottom surface of the cooking container 21 in a non-contact manner and calculates the temperature of the cooking container 21, the responsiveness is fast and the temperature of the cooking container 21 is accurately detected. It is something that can be done. For this reason, the combustion gas control with respect to the gas burner 23 of the heating control means 24 also responds quickly to the temperature change of the cooking vessel 21.

  The infrared sensor 25 is disposed substantially at the center of the gas burner 23, and can detect the bottom surface temperature of the cooking vessel 21 as a configuration that is hardly affected by the combustion flame of the gas burner 23. The central portion of the cooking vessel 21 is a position that is not easily affected by the combustion flame of the gas burner 23, and the central portion of the bottom surface of the cooking vessel 21 shows a temperature proportional to the food in the cooking vessel 21. That is, by detecting the bottom surface temperature of the cooking vessel 21 that is the central portion of the gas burner 23, temperature control corresponding to the temperature of the food can be performed.

  In recent gas cookers, a top plate using a glass material for the top plate is used. It is also conceivable to reduce the influence of dirt on the infrared sensor 25 by detecting the bottom surface temperature of the cooking vessel 21 through the top plate. The top plate is made of a lithia ceramic material. As for the infrared transmittance of this top plate, a wavelength of 2.5 μm or less is well transmitted, and a wavelength of 2.5 μm to 4 μm or less is transmitted by several tens of percent. Moreover, 4 μm or more is hardly transmitted. The infrared sensor 25 is composed of an InGaAs (indium gallium arsenide) photodiode, and has a light receiving sensitivity wavelength of approximately 0.7 μm to approximately 2.7 μm. Thus, the temperature of the cooking vessel 21 can be detected via the top plate, and the abnormality of the infrared sensor 25 can also be detected in the same manner.

  The infrared sensor 25 uses a photodiode, but a PIN photodiode, PbS (lead sulfide), PbSe (lead selenide), or Ge (germanium) can perform the same operation.

  As described above, in the present embodiment, the temperature of the bottom surface of the cooking vessel 21 is detected by arranging the infrared sensor 25 substantially at the center of the gas burner 23 so as not to be affected by the combustion flame of the gas burner 23. It can be done.

(Embodiment 2)
FIG. 2 is a cross-sectional view of a gas cooker according to Embodiment 2 of the present invention.

  The difference between the second embodiment and the first embodiment of the present invention is that the infrared sensor 25 is disposed below the combustion flame of the gas burner 23 to reduce the thermal effect of the combustion flame of the gas burner 23. Is.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. When heating is started, the gas burner 23 burns and the cooking vessel 21 is heated by the combustion flame. The heat of the combustion flame radiates heat not only to the cooking vessel 21 but also to the periphery of the gas burner 23. The infrared sensor 25 disposed in the vicinity of the gas burner 23 is heated by the heat of the combustion flame of the gas burner 23. The infrared sensor 25 is generally a heat-sensitive sensor, and an error occurs in temperature detection particularly when the heat in the vicinity of the infrared sensor 25 is not balanced. The infrared sensor 25 is composed of an infrared detecting element such as a thermopile, and a temperature difference is generated between a light receiving surface that receives infrared rays in the infrared detecting element and a package of the infrared detecting element that covers the light receiving surface. Due to this temperature difference, the light receiving surface receives infrared rays radiated from the package, and the received infrared rays receive other than infrared rays radiated from the cooking container 21, so that an error occurs in temperature detection. That is, by providing the infrared sensor 25 on the lower surface of the combustion flame of the gas burner 23, it is possible to reduce the thermal effect of the high-temperature combustion flame.

  As described above, in the present embodiment, by disposing the infrared sensor 25 below the combustion flame of the gas burner 23, it is possible to reduce the thermal effect of the combustion flame of the gas burner 23, and the infrared sensor 25. Can stably detect the bottom surface temperature of the cooking vessel 21.

(Embodiment 3)
FIG. 3 is a cross-sectional view of the gas cooker according to the embodiment of the present invention.

  The difference between the third embodiment and the first embodiment of the present invention is that the infrared sensor is provided with a heat insulating means for blocking heat from the surroundings to reduce the heat effect of the combustion flame of the gas burner. It is.

  The heat insulating means is made of a heat-resistant resin having a low thermal conductivity so as to cover the upper part of the infrared sensor 25, and reduces the thermal influence of the combustion flame of the gas burner 23.

  The heat insulating means 27 is only required to be able to insulate the infrared sensor 25 with a material having a high heat resistance and low thermal conductivity. For example, the heat insulating means 27 is limited to the present embodiment such as a material such as glass wool using a heat shielding effect by an air layer. It is not a thing.

  Moreover, although the heat insulation means 27 is provided in the upper part of the infrared sensor 25, in order to reduce the reflected heat from the lower part of the infrared sensor 25, the heat insulation effect is improved by providing a heat insulation means in the lower part. . Furthermore, in order to reduce the temperature rise of the infrared sensor, the same effect can be obtained even by blowing and cooling.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. During cooking, the temperature of the infrared sensor 25 rises due to the heat of the combustion flame of the gas burner 23. The heat insulating means 27 is provided above the infrared sensor 25 so as to shield the heat of the combustion flame. By the heat insulation means 27, the infrared sensor 25 can reduce the thermal influence of the combustion flame.

  As described above, in the present embodiment, the temperature of the infrared sensor 25 is reduced by the heat insulating means 27, and the bottom surface temperature of the cooking vessel 21 can be detected stably.

(Embodiment 4)
FIG. 4 is a cross-sectional view of a gas cooker according to Embodiment 4 of the present invention.

  The difference between Embodiment 4 and Embodiment 1 of the present invention is that the heating control means includes rice cooking control means 28 for storing the heating amount of the rice cooking process.

  The rice cooking control means 28 corrects the emissivity of the cooking container 21 by determining the temperature of the infrared sensor 25 and obtaining the cooking temperature when the boiling of the cooking container 21 is stable.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As for the rice cooking control means 28, a rice cooking process is advanced by the heating amount and counting time for every preset rice cooking process. The rice cooking process is roughly divided into four processes: pre-cooking, boiling, cooking, and spotty. In the boiling process, the food in the cooking container 1 is in a boiling state, and when the temperature of the cooking is in a saturated state, the bottom temperature of the cooking container 1 is also stable at about 100 ° C. At this time, the emissivity of the cooking container 21 is obtained by comparing the detected temperature of the infrared sensor 25 and the temperature of the cooking container 21. Regarding the relationship between the emissivity of the cooking vessel 21 and the detected temperature of the infrared sensor 25, when the emissivity is 1, the temperature of the infrared sensor 25 and the bottom temperature of the cooking vessel 21 are equal. However, in a general stainless steel pan, the temperature of the infrared sensor 25 is proportional to the emissivity ε, and the infrared sensor temperature Ts is proportional to the emissivity ε × the cooking vessel temperature. That is, it can obtain | require with emissivity = Ts / 100 degreeC.

  Next, the rice cooking process proceeds, and the cooking process is for cooking the rice with good moisture. The cooking temperature at this time is an important temperature for not burning the rice and reducing the stickiness of moisture. According to the experimental results, the pan bottom temperature is about 130 ° C and can be cooked deliciously. The cooking temperature Tm can be obtained by (130 ° C.-100 ° C.) × ε + Ts, and cooking can be performed by correcting the emissivity of the cooking vessel 21. This cooking is not stable only with a certain amount of time and amount of heat because the cooking time varies depending on the difference in the pan, the type and temperature of the rice, and the amount of water. Delicious cooking rice can be made by detecting the cooking temperature and completing the cooking.

  As described above, in the present embodiment, the infrared sensor 25 is configured to correct the emissivity of the bottom surface of the cooking container 21, and the bottom surface radiation of the cooking container 21 is determined from the temperature of the infrared sensor 25 when boiling is stable. By calculating the rate and determining the cooking temperature, a gas cooker capable of accurately detecting the cooking temperature and cooking rice is realized.

(Embodiment 5)
FIG. 5 is a cross-sectional view of the gas cooker according to the fifth embodiment of the present invention.

  The difference between the fifth embodiment and the fourth embodiment of the present invention is that the rice cooking control means is provided with a combined number input means 29 for inputting the amount of rice so as to cook with a heating amount suitable for the combined number. It is a point.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The combined number input means 29 is configured in the operation unit of the gas cooker main body, and is input by the user with an operation switch (not shown). For example, the number of rice can be selected from three types, 1 go, 2 go, 3 go. Since the amount of water changes according to the amount of rice, it is necessary to increase the heating amount as the total number increases. The process of the rice cooking control means 28 consists of the amount of heating, and can cook delicious rice by optimizing the amount of heating according to the amount of rice. Depending on the total number set by the total number input means 29, the rice cooking control means 28 is proceeding with the heating amount suitable for the total number.

  In addition, although the total number input means 29 is making three types of total number selection, it should just be able to select the total number according to the amount of rice and the amount of water, and is not limited to this embodiment.

  As described above, in the present embodiment, the combined number input means 29 controls the heating amount suitable for the combined number that is the amount of rice, whereby cooking rice suitable for the amount of rice can be performed.

(Embodiment 6)
FIG. 6 is a cross-sectional view of a gas cooker according to Embodiment 6 of the present invention.

  The difference between the sixth embodiment and the fifth embodiment of the present invention is that the rice cooking control means provides the remaining rice cooking time display means 30 for displaying the elapsed cooking time, and the remaining time is calculated when the cooking is completed. I am trying to confirm.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The rice cooking remaining time display means 30 displays the remaining time of the rice cooking process set after rice cooking was started. For example, the remaining time is 40 minutes and blinks every second. In synchronism with the time during which the rice cooking process is being carried out by the rice cooking control means 28, the progress of the rice cooking process is notified by subtracting and displaying the remaining rice cooking time every minute. The time from the start of cooking rice to cooking is not constant depending on the amount of rice, amount of water, room temperature, and cooking container. Furthermore, because the moisture content of rice varies depending on the type and timing of rice, the same rice cooking process cannot produce delicious optimal rice.

  Boiled rice is used to remove the moisture from the rice and cook it deliciously. The cooking temperature at this time is an important temperature for not burning the rice and reducing the stickiness of moisture. Cooked rice can be cooked deliciously by completing the cooking at the cooking time, depending on the difference in the pan, the type and temperature of the rice, and the amount of water.

  After completing this cooking, the process proceeds to the uneven process. The unevenness process is a fixed time of about 10 minutes, and the remaining rice cooking time is determined at the cooking completion point. The confirmation of the remaining rice cooking time can be determined by turning on the blinking display so that the user has determined the remaining rice cooking time. After this, the remaining cooking time of 10 minutes is subtracted every minute to notify the completion of cooking.

  As described above, in the present embodiment, the remaining rice cooking time display means 30 for displaying the elapsed cooking time determines the remaining time when cooking is completed, so that the amount of rice, amount of water, room temperature, cooking Even if the cooking time changes depending on the container, a stable cooking time can be notified.

(Embodiment 7)
FIG. 7 is a cross-sectional view of the gas cooker according to the seventh embodiment of the present invention.

  The difference between the seventh embodiment and the sixth embodiment of the present invention is that the rice cooking control means is provided with an operation means 31 including an operation switch, and when the operation switch is input during rice cooking, the total number input means 29 is provided. The total number set in is displayed.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the operation switch of the operation means 31 is pressed, the total number is displayed. This total number display uses the same segment displaying the remaining rice cooking time for rationalization of the character size of the operation display unit, the liquid crystal display, and the like. During cooking, the remaining rice cooking time is displayed, and the total number set by the total number input means 29 is displayed only while the operation switch of the operation means 31 is being pressed. When the user wants to confirm the total number during cooking, it can be easily confirmed by the operation means 31.

  As described above, in the present embodiment, when the operation switch is input by the operating unit 31 during cooking, the total number set by the combined number input unit 29 is displayed so that the total number during cooking is displayed. Can be easily confirmed.

(Embodiment 8)
FIG. 8 is a cross-sectional view of the gas cooker according to the eighth embodiment of the present invention.

  The difference between the eighth embodiment and the fifth embodiment of the present invention is that the rice cooking control means is provided with a total number storage means 32 for storing the information of the total number input means 29, and the total number used last time when the power is turned on again. The number is displayed.

  The combined number storage means uses an EEPROM storage device and can hold the previous data even when the power is turned off. Note that the total number storage means 32 only needs to be able to store the total number of rice cooked last time, and the same operation can be performed with a storage medium such as a memory card.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The total number input means 29 selects the total number and starts cooking rice. After that, when the cooking is completed, the total number information is sent to the total number storage means 32. The total number storage means 32 stores the total number for this total number information. When the user turns on a power switch (not shown) to start cooking rice again, the total number storage means 32 sends the total number information stored in the total number input means 29. The total number input means 29 displays the total number so that the total number cooked last time is displayed. Since the total number of rice cooked last time is displayed for the user, the number of operations for selecting the total number may be small, so that it is possible to realize user-friendly operability.

  As described above, in the present embodiment, by providing the total number storage means 32 for storing the information of the total number input means 29, it is possible to display the total number used last time when the power is turned on again. Operability can be realized.

(Embodiment 9)
FIG. 9 is a cross-sectional view of the gas cooker according to the ninth embodiment of the present invention.

  The difference between the ninth embodiment and the fourth embodiment of the present invention is that the rice cooking control means uses the temperature of the infrared sensor 25 to determine the non-compliant pot of the infrared sensor 25 when the cooking vessel 21 is boiled and stable. A means 33 is provided to notify the user when the emissivity of the cooking container 21 is low.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The output of the infrared sensor 25 varies depending on the emissivity even when the cooking container 21 has the same temperature. In particular, when the cooking vessel 21 is a mirror surface, the output of the infrared sensor 25 is small. In the case of a cooking container having a low emissivity, the output of the infrared sensor 25 deteriorates the temperature detection accuracy such as the temperature resolution. Therefore, the cooking container 21 having a low emissivity is determined as a non-conforming pan. The non-conforming pan determination means 33 determines that the pot is non-conforming if the output of the temperature sensor 24 is equal to or less than a predetermined value when the cooking vessel 21 is stable in boiling. Thus, in the pan where the temperature detection accuracy of the infrared sensor 25 deteriorates, the rice cooking performance can be ensured by using an appropriate cooking container 21 so as to notify the user.

  As described above, in the present embodiment, the emissivity of the cooking container 21 is low by the non-conforming pan determination means 33 that determines the non-conforming pan of the infrared sensor 25 using the temperature of the infrared sensor 25 when the cooking container 21 is boiled and stable. In such a case, the user can be cooked using an appropriate cooking container 21 so as to notify the user.

  In addition, you may perform operation | movement of the said rice cooking control means using a heating control means or another automatic cooking control means (not shown).

(Embodiment 10)
FIG. 10 is a cross-sectional view of the gas cooker according to the tenth embodiment of the present invention.

  The difference between the tenth embodiment and the fourth embodiment of the present invention is that the rice cooking control means is provided with an abnormality notifying means 34 for notifying the abnormality of the infrared sensor 25 so as to notify the abnormality notification at the end of cooking. The automatic cooking of that time is completed.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  If the infrared sensor 25 becomes abnormal during cooking, the rice cooking control means 28 detects an abnormality of the infrared sensor 25. By notifying this abnormality at the end of cooking, the process of automatic cooking proceeds, and cooking at that time can be completed. Menus with long cooking time, such as cooked rice and stewed dishes, will end in a boiled state if cooking is stopped halfway, and will not reach the edible level even if they are cooked again halfway. In order to avoid this, when the infrared sensor 25 is abnormal, the cooking process is advanced to complete the cooking. The progress of the cooking process at this time can proceed according to the time of the rice cooking control means 28.

  As described above, in the present embodiment, an abnormality notification of the infrared sensor 25 is notified at the end of cooking, and the automatic cooking of that time is completed to prevent raw cooking of cooked foods, etc. The food level can be cooked.

  In addition, you may perform operation | movement of the said rice cooking control means using a heating control means or another automatic cooking control means (not shown).

(Embodiment 11)
FIG. 11 is a cross-sectional view of the gas cooker according to the eleventh embodiment of the present invention.

  The difference between the eleventh embodiment and the first embodiment of the present invention is that the infrared sensor is provided with intermittent power control means 35 for intermittently supplying power for driving the infrared sensor 25, and the infrared sensor 25 is used during cooking. This is to reduce the consumed current.

  About the gas cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. The intermittent power supply control means 35 is controlled so that the power supplied from the heating control means 26 to the infrared sensor is intermittently supplied. When controlling the temperature of the cooking container 21, the temperature information of the cooking container 21 is used about every 1 second. The degree to which the temperature of the cooking vessel 21 changes can be obtained from the heat capacity of the cooking vessel 21 and the heating amount of the gas burner 23, and the cooking vessel can generally be controlled with temperature information about every 1 second. During this 1 second, the temperature of the cooking container 21 is detected by driving the infrared sensor 25 for approximately 0.1 second. Thereafter, the power supply to the infrared sensor 25 is cut off for about 0.9 seconds to be stopped. Thus, the temperature of the cooking vessel 21 can be detected with a current consumption of 1/10 compared to the case where power is continuously supplied. In particular, in the case of a configuration in which power is supplied by a small storage battery such as a dry battery, an effect of reducing power consumption can be obtained by intermittent control.

  As described above, in the present embodiment, the intermittent power supply control means 35 can reduce the current consumption consumed by the infrared sensor 25 and can save power.

  As described above, the gas cooker according to the present invention can detect the temperature stably even in a cooking container having a different emissivity by determining the temperature of the infrared sensor when the boiling temperature of the cooking container is stable and determining the cooking temperature. Therefore, it can be applied to uses such as a gas cooker used in general homes, offices, restaurants and the like.

Sectional drawing which shows the structure of the gas cooker in Embodiment 1 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 2 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 3 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 4 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 5 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 6 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 7 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 8 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 9 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 10 of this invention. Sectional drawing which shows the structure of the gas cooker in Embodiment 11 of this invention. Sectional drawing which shows the structure of the gas cooker of a prior art example

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Cooking container 22 Goto 23 Heating coil 24 Gas valve 25 Infrared sensor 26 Heating control means 27 Heat insulation means 28 Rice cooking control means 29 Combined number input means 30 Rice cooking remaining time display means 31 Operation means 32 Combined number memory means 33 Incompatible pot determination means 34 Abnormality notification means 35 Intermittent power supply control means

Claims (11)

A cooking container for containing food, a gas burner for heating the cooking container, a gas valve for supplying and shutting off fuel gas to the gas burner, an infrared sensor for detecting the temperature of the cooking container, and the infrared sensor A heating control means for adjusting the opening amount of the gas valve according to the temperature information and controlling the heating amount according to the supply amount of the fuel gas, and the infrared sensor is disposed substantially at the center of the gas burner to heat the cooking vessel A gas cooker that detects the temperature of the center. The gas cooker according to claim 1, wherein the infrared sensor is disposed below the combustion flame of the gas burner so as to reduce a thermal effect of the combustion flame of the gas burner. The gas cooker according to any one of claims 1 and 2, wherein the infrared sensor is provided with a heat insulating means for cutting off heat from the surroundings to reduce the thermal effect of the combustion flame of the gas burner. The heating control means is provided with a rice cooking control means for storing the heating amount of the rice cooking process, and the rice cooking control means determines the temperature of the infrared sensor when the boiling of the cooking container is stable, and obtains the cooking temperature by cooking the cooking container. The gas cooker according to any one of claims 1 to 3, wherein the emissivity of the gas is corrected. The gas cooker according to claim 4, wherein the rice cooking control means is provided with a combined number input means for inputting the amount of rice to cook rice with a heating amount suitable for the combined number. The rice cooking control means is provided with rice cooking remaining time display means for displaying the progress of rice cooking time, and the remaining time is determined when cooking is completed. Gas cooker. The rice cooking control means includes an operation means including an operation switch, and displays the total number set by the total number input means when the operation switch is input during rice cooking. Gas cooker described in 1. The rice cooking control means is provided with a total number storage means for storing information of the total number input means, and displays the total number used last time when the power is turned on again. Gas cooker. The heating means or the rice cooking control means is provided with non-conforming pan judging means for judging the non-conforming pan of the infrared sensor by using the infrared sensor temperature when the cooking container is boiled stably, and notifies the user when the emissivity of the cooking container is low. The gas cooker according to any one of claims 1 to 8. The heating means or the rice cooking control means is provided with an abnormality notifying means for notifying an abnormality of the infrared sensor so as to notify the abnormality notification at the end of cooking, thereby completing the cooking or rice cooking. Gas cooker described in 1. 11. The infrared sensor is provided with intermittent power supply control means for intermittently supplying power for driving the infrared sensor, so that current consumption consumed by the infrared sensor during cooking is reduced. Gas cooker described in 1.

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