JP2009144964A - Range hood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a range hood capable of performing an optimum operation according to a used heating cooker without depending on kinds of heating cookers. <P>SOLUTION: This range hood comprises a temperature detecting means 3 disposed at an upper part of the heating cooker 1 such as a gas cooker, an electric cooker and the like, and detecting temperatures of a fan 2 exhausting oily smoke and the like generated in cooking outdoors, and a heat source itself on the heating cooker, an operation means 9 for operating a temperature gradient for a prescribed time from a value detected by the temperature detecting means 3, and a control means 4 for operating or stopping the fan 2, wherein the used heating cooker 1 is discriminated from a result derived from the operation means 9, a control algorithm set according to the discriminated heating cooker 1 is selected, and the automatic operation by the fan 2 is controlled according to the control algorithm. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the range hood which automatically controls the operation according to the use state of the cooking device, the present invention identifies the heating cooking device being used and performs the optimum operation without depending on the type of the cooking device. Range hood that can be used.

In a conventional cooker hood, ultraviolet rays are detected using an ultraviolet sensor and a temperature sensor as a method of identifying a cooking device, and if a temperature equal to or higher than a predetermined value is detected, it is judged as a gas cooker, and ultraviolet rays cannot be detected. When a temperature equal to or higher than the value is detected, there is a method of determining an electric cooker and controlling the operation in a mode corresponding to the identified cooking device (see, for example, Patent Document 1).
JP-A-11-281106

  In such a conventional range hood, it is necessary to use a plurality of sensors in order to identify the cooking device, and the actual usage status of the cooking device only by judging the usage status of the cooking device by temperature. Therefore, there is a need for a range hood that does not depend on the type of heating cooker without using a plurality of sensors and that has a high response.

  This invention solves such a conventional subject, and it aims at providing the range hood which does not depend on the kind of cooking-by-heating machine without using a plurality of sensors, and has good responsiveness. .

  In order to solve the above problems, in the range hood of the present invention, a fan that is installed above a heating cooker such as a gas cooker or an electric cooker and exhausts oily smoke or the like generated during cooking to the outdoors and the heating cooker A temperature detecting means 3 for detecting the temperature of the heat source itself on the apparatus; a calculating means for calculating a temperature gradient for a predetermined time from a value detected by the temperature detecting means 3; and a control means for operating or stopping the fan. And identifying the heating cooker used from the result derived by the computing means, selecting a control algorithm set according to the identified cooking cooker, and automatically operating the fan according to the control algorithm Control is performed.

  Further, in another means of the range hood of the present invention, when the temperature gradient detected by the calculating means exceeds a preset first threshold value, the cooking device used is a gas cooking device. Determination means for determining

  Further, the other means of the range hood of the present invention is such that when the temperature gradient detected by the calculating means falls below the first threshold value 1 set in advance, the heating cooker used is an electric cooker. It has a judgment means to judge that there exists.

  In addition, the other means of the range hood of the present invention, once identifying the cooking device in use, the control algorithm set according to the identified cooking device is stored in the storage means built in the computing means When the heating cooker is operated for the second time and thereafter by storing it, the operation of the fan is controlled according to a control algorithm corresponding to the heating cooker built in the storage device.

  Further, the other means of the range hood of the present invention has a reset means for initializing the control algorithm corresponding to the heating cooker identified at the start of operation built in the storage means and selecting the control algorithm again. .

  The other means of the range hood of the present invention is the second threshold value in which the temperature detected by the temperature detecting means 3 is set in advance when it is determined that the cooking device being used is a gas cooker. It is characterized in that the operation by the fan is started when exceeding.

  The other means of the range hood of the present invention is the third threshold value in which the temperature detected by the temperature detecting means 3 is set in advance when it is determined that the cooking device being used is an electric cooking device. It is characterized in that the operation by the fan is started when exceeding.

  Further, the other means of the range hood of the present invention stops the operation control by the fan when the temperature gradient detected by the calculating means when using the electric cooker falls below a preset fourth threshold value. It is characterized by.

  Another means of the range hood of the present invention is that the temperature detecting means 3 when the gas cooker is used has a temperature gradient due to a rapid temperature rise exceeding a preset fifth threshold or a preset fourth threshold. When the value falls below the threshold, the operation control by the fan is stopped.

  In addition, the other means of the range hood of the present invention performs operation control by a fan for a predetermined time when the temperature gradient detected by the temperature detection means 3 when using the electric cooker falls below a preset fourth threshold value. It is characterized by continuing.

  Another means of the range hood of the present invention is that the temperature detecting means 3 when the gas cooker is used has a temperature gradient due to a rapid temperature rise exceeding a preset fifth threshold or a preset fourth threshold. When the value falls below the threshold value, the operation control by the fan is continued for a predetermined time.

  Moreover, the other means of the range hood of this invention has an alerting | reporting means which issues a warning, when the temperature detected by the temperature detection means 3 at the time of gas cooker use exceeds the 6th threshold value preset. .

  Further, the other means of the range hood of the present invention has a display means for warning when the temperature detected by the temperature detecting means 3 when using the gas cooker exceeds a preset sixth threshold value.

  According to the range hood of the present invention, the type of the heating cooker is identified by detecting the temperature of the heat source itself on the heating cooker and instantaneously calculating the temperature gradient, and according to the type of the heating cooker. A range hood can be provided that performs optimal operation according to the control algorithm.

  The invention of the range hood according to claim 1 is provided above a heating cooker such as a gas cooker or an electric cooker, and exhausts the smoke generated during cooking to the outside of the room and the heating cooker. Temperature detection means 3 for detecting the temperature of the heat source itself, calculation means for calculating a temperature gradient for a predetermined time from the value detected by the temperature detection means 3, and control means for operating or stopping the fan, The cooking device in use is identified from the result derived by the calculation means, a control algorithm set according to the identified cooking device is selected, and automatic operation control of the fan is performed according to the control algorithm. It is characterized by being performed, and it becomes possible to perform an optimum operation regardless of the heating cooker used with good responsiveness to temperature changes.

  In the invention of the range hood according to claim 2, when the temperature gradient detected by the calculation means exceeds a preset first threshold, the cooking device used is a gas cooking device. It has the determination means to determine, and it becomes possible to identify the heating cooker currently used in a short time and correctly.

  In the invention of the range hood described in claim 3, when the temperature gradient detected by the calculating means is below the first threshold value 1 set in advance, the cooking device used is an electric cooking device. It is possible to identify the heating cooker being used in a short time and accurately.

  In the invention of the range hood according to claim 4, once the cooking device in use is identified, the control algorithm set according to the identified cooking device is stored in the storage device built in the computing device. When the cooking device is operated for the second time or later, the operation of the fan is controlled according to a control algorithm corresponding to the cooking device incorporated in the storage device. When it becomes the second time or later, it becomes possible to omit the processing step for identifying the cooking device.

  The invention of the range hood described in claim 5 has a reset means for initializing the control algorithm corresponding to the heating cooker identified at the start of operation built in the storage means and selecting the control algorithm again. Thus, when a user buys a heating cooker, it is possible to identify the heating cooker being used again.

  In the invention of the range hood described in claim 6, when it is determined that the cooking device being used is a gas cooking device, the temperature detected by the temperature detecting means 3 is set to a second threshold value set in advance. It is characterized by starting operation by a fan when exceeding, and automatically starting operation according to the usage status of the heating cooker without the user starting operation of the range hood himself Make it possible.

  In the invention of the range hood described in claim 7, when it is determined that the heating cooker being used is an electric cooker, the temperature detected by the temperature detecting means 3 is set to a third threshold value set in advance. It is characterized by starting operation by a fan when exceeding, and automatically starting operation according to the usage status of the heating cooker without the user starting operation of the range hood himself Make it possible.

  The invention of the range hood described in claim 8 stops the operation control by the fan when the temperature gradient detected by the calculation means when using the electric cooker falls below a preset fourth threshold value. It is a feature and enables the user to automatically stop the operation according to the use condition of the cooking device without stopping the range hood.

  According to the ninth aspect of the present invention, the temperature detection means 3 when the gas cooker is used has a temperature gradient caused by a rapid temperature rise exceeding a preset fifth threshold value or a preset fourth threshold value. It is characterized by stopping the operation control by the fan when it falls below, and the user automatically stops the operation according to the usage status of the heating cooker without stopping the range hood himself It is possible to do.

  In the invention of the range hood according to claim 10, when the temperature gradient detected by the temperature detecting means 3 when using the electric cooker falls below a preset fourth threshold value, the operation control by the fan is continued for a predetermined time. This makes it possible to sufficiently exhaust the residual heat after the heating cooker stops.

  The invention of the range hood according to claim 11 is the case where the temperature detection means 3 when the gas cooker is used has a temperature gradient due to a rapid temperature rise exceeding a preset fifth threshold value or a preset fourth threshold value. When the temperature is lower than, the operation control by the fan is continued for a predetermined time, and the residual heat after the heating cooker is stopped can be exhausted sufficiently.

  The invention of the range hood described in claim 12 has a notifying means for issuing an alarm when the temperature detected by the temperature detecting means 3 when the gas cooker is used exceeds a preset sixth threshold value. Yes, it is possible to warn the user when the user forgets to turn off the gas cooker.

  The invention of the range hood described in claim 13 has a display means for warning when the temperature detected by the temperature detecting means 3 exceeds a preset sixth threshold when the gas cooker is used. It is possible to warn the user when the user forgets to turn off the gas cooker.

(Embodiment 1)
An embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the cooker hood of the present invention is installed above a gas or electric heating cooker 1, and is equipped with a fan 2 for exhausting oily smoke and the like generated during cooking to the outdoors, and a heat source itself on the heating cooker. The temperature detection means 3 for detecting the temperature, that is, the surface temperature of the cooking utensil placed on the heating unit of the heating cooker or the heating cooker, and the control means 4 for operating or stopping the fan 2 are provided in the main body 5. The display unit 6 and the reset unit 7 are provided on the front surface of the main body 5 and are electrically connected to the control unit 4. The control means 4 includes a notifying means 8 and a calculating means 9 for calculating a temperature gradient. The determining means 10 for identifying the heating cooker 1 used from the calculation result and the heating cooker 1 The storage means 11 for storing the control algorithm is included in the calculation means 9.

  4 and FIG. 7 and FIG. 5 and FIG. 6 in the above configuration, the range hood installed above the heating cooker 1 changes the temperature gradient from the temperature of the heat source itself detected by the temperature detection means 3. The operation of identifying the cooking device 1 that is calculated and used and performing automatic operation control according to the control algorithm corresponding to the cooking device 1 will be described.

  In STEP 1, the heating cooker 1 is not used, and no significant temperature gradient has been confirmed. Therefore, the fan 2 is not energized.

  In the gas cooker and the electric cooker, the temperature rise gradient on the heating cooker side immediately after the start of cooking is different, so in STEP2 to STEP4, the temperature gradient is calculated by the calculation means 9 from the detection result of the temperature detection means 3. When the preset first threshold value is exceeded, the heating cooker 1 being used is determined to be a gas cooker, and a control algorithm set according to the gas cooker is selected and stored in the storage means 11. Remember. When the temperature gradient is lower than a preset first threshold, the heating cooker 1 being used is determined to be an electric cooker, and a control algorithm set according to the electric cooker is selected. The data is stored in the storage unit 11. That is, as the temperature detection means 3 for detecting the temperature of the heat source itself on the heating cooker 1 here, the amount of generated far infrared rays is detected in a non-contact manner from the range hood side, and the absolute temperature of each object on the cooking appliance side is determined. A thermopile that can be detected and a microcomputer as the calculation means 9, a temperature gradient is calculated by the calculation means 9 from the temperature detected by the temperature detection means 3 installed in the main body 5, and a first preset value is set. If it exceeds the threshold value, the heating cooker 1 used by the judgment means 10 built in the computing means 9 is judged as a gas cooker, and a control algorithm set according to the gas cooker is selected. To do. When the temperature gradient falls below a preset first threshold value, the cooking device 1 used by the judging means 10 built in the computing means 9 is judged to be an electric cooking device and is used as an electric cooking device. Select the control algorithm that is set accordingly.

  For example, as shown in FIG. 5 and FIG. 6, temperature gradients Y1 / X1, Y2 / X1 (° C./second) from temperatures Y1, Y2 (° C.) increased at an arbitrary time X1 (second) from the start of operation of the heating cooker 1 ) The result is compared with a preset first threshold value, and a control algorithm corresponding to the cooking device 1 being used is selected in the same manner as described above. Here, when the arbitrary time X1 is about 10 seconds and the first threshold is about 5 to 10 ° C./second, the gas cooker and the electric cooker can be easily identified.

  Moreover, since the temperature rise value on the heating device side when cooking is started differs between the gas cooker and the electric cooker, in STEP5 and STEP6, after selecting the control algorithm corresponding to the heating cooker 1, the gas cooking When using a cooker, a fan is used to exhaust heat, oily smoke, etc. generated during cooking when the preset second threshold is exceeded, and when the electric cooker is used, the preset third threshold is exceeded. 2 operation starts. Here, when the second threshold is about 70 to 100 ° C. and the third threshold is about 40 to 60 ° C., the operation of the range hood is started at an appropriate timing according to each of the gas cooker and the electric cooker. Can do.

  Further, in STEP7 and STEP8, when the result of the temperature gradient calculated by the calculating means 9 when using the electric cooker falls below the preset fourth threshold, it is determined that cooking by the electric cooker has ended. Then, the range hood determines that the operation is stopped, and stops the operation of the fan 2 for exhausting heat, oily smoke and the like generated during cooking or continues the fan operation for a predetermined time in order to exhaust the remaining odor. It will be. For example, as shown in FIG. 5, Y3 (° C.) is the temperature immediately before the temperature detected by the temperature detecting means 3 starts to decrease starting from the point when the use of the heating cooker 1 is stopped, and X2 (seconds) is the predetermined time. A temperature gradient (Y3−Y4) / X2 (° C./second) is obtained from the temperature Y4 (° C.) when the temperature detected by the temperature detecting means 3 after the lapse has elapsed. As a result, when the temperature gradient is significantly lower than a predetermined value and falls below a preset fourth threshold value, it is determined that the heating cooker 1 being used is stopped and the fan operation is stopped or when cooking. In order to completely exhaust the heat, oily smoke, etc. generated during the operation, the fan operation is stopped for a predetermined time t. Here, the predetermined time X2 is about 30 seconds, the fourth threshold is about 0.1 to 0.5 ° C./second, and the remaining time t is about 5 minutes. Can be stopped.

  On the other hand, when the gas cooker is used, as in the case of using the electric cooker, if the result of the temperature gradient calculated by the calculation means 9 falls below a preset fourth threshold value, the operation of the electric cooker is performed. Is stopped, and the fan operation is continued for the remaining time t in order to completely exhaust heat, oily smoke and the like generated during the operation by the fan or cooking. For example, as shown in FIG. 5, the temperature detecting means 3 is a temperature gradient from Y7 (° C.) immediately before the temperature starts to drop and Y8 (° C.) from the temperature after a predetermined time X2 (seconds) has elapsed. (Y7−Y8) / X2 (° C./second) is obtained. If the result falls below a preset fourth threshold value, it is determined that the gas cooker has stopped operating, and the fan operation is stopped or heat, oil smoke, etc. generated during cooking are exhausted completely. The fan stops after a predetermined time. Here, the predetermined time X2 is about 30 seconds, the fourth threshold is about 0.1 to 0.5 ° C./second, and the remaining time t is about 5 minutes. Can be made.

  Further, when the gas cooker is used, if a cooking utensil such as a pan or a frying pan is removed from the heating cooker 1 immediately after the operation of the gas cooker is stopped, it is placed on the heating cooker 1 during cooking. The temperature detection means 3 that has detected the surface temperature of the cooking utensil that has been used will detect the temperature of the heating part of the heating cooker 1 as the temperature of the heat source itself on the heating cooker 1, and heat it up to just before by the flame. If the temperature rises rapidly to detect the temperature of the burner, and if the preset temperature gradient exceeds the fifth threshold, it is determined that the operation of the gas cooker has been stopped, and the operation by the fan is stopped. Alternatively, the fan operation is continued for the remaining time t in order to completely exhaust heat, oil smoke, odor and the like generated during cooking. For example, as shown in FIG. 6, the temperature detection means 3 starts from the point immediately after the cooking utensil is removed from the gas cooker, and the temperature immediately before the temperature starts to rise is Y5 (° C.) and a predetermined time X3 (seconds) has elapsed. The later increased temperature is detected as Y6 (° C.), and a temperature gradient (Y6-Y5) / X3 (° C./second) is obtained. If the result exceeds the preset fifth threshold value, it is determined that the gas cooker has stopped operating, in order to completely exhaust the heat, oil smoke, odor, etc. generated when the fan operation is stopped or cooked. The fan operation is continued for a predetermined time. Here, the predetermined time X3 is about 5 seconds, the fifth threshold is about 10 to 20 ° C./second, and the remaining time t is about 5 minutes, so that the cooking operation using the gas cooker is completed. The range hood can be operated.

  As described above, the temperature gradient is provided by providing the temperature detecting means 3 for detecting the temperature of the heat source itself on the heating cooker, that is, the surface temperature of the cooking utensil placed on the heating unit of the heating cooker or the heating cooker from the range hood side. By calculating the range hood, it is possible to easily operate the cooker hood with a single sensor without using a plurality of sensors.

(Embodiment 2)
The configuration of the second embodiment of the present invention is the same as that of the first embodiment. The temperature detection means for detecting the temperature of the heat source itself on the heating cooker 1 by the range hood installed above the heating cooker 1 using the flowchart of FIG. The operation of calculating the temperature gradient from the temperature detected by 3 to identify the type of the cooking device 1 being used and performing the automatic operation control according to the control algorithm corresponding to the cooking device 1 will be described. The same sentences as those in Embodiment 1 are omitted.

  In STEP7 and STEP8, when the temperature detected by the temperature detecting means 3 exceeds the preset sixth threshold value when using the gas cooker, it is determined that the abnormal state is caused by forgetting to extinguish the fire. Alert the user. Alternatively, the display unit 6 warns the user. Here, since the temperature detection means 3 detects the temperature of the flame of the gas cooker, the sixth threshold is about 500 ° C., so that it is possible to reliably detect forgetting to put out the fire and notify the user. .

(Embodiment 3)
The configuration of the third embodiment of the present invention is the same as that of the first embodiment. 4 and 7, the steps STEP 3 to STEP 4 are STEPA, the steps STEP 5 to STEP 7 in FIG. 4 are STEPB, and the steps STEP 5 to STEP 7 in FIG. 7 are STEPC. The type of the heating cooker 1 in which the range hood installed above 1 calculates the temperature gradient from the temperature detected by the temperature detection means 3 for detecting the temperature of the heat source itself on the heating cooker 1 is used. The operation | movement which identifies and performs automatic operation control according to the control algorithm according to the heating cooker 1 is described. The same sentences as those in Embodiment 1 are omitted.

  In STEP3 to STEP5, the presence or absence of storage of the control algorithm set in the storage means 11 according to the cooking device is confirmed. If the storage means 11 does not store the control algorithm, the process proceeds to STEP (STEP 3 to STEP 4 in FIG. 4) as in the first embodiment. If the storage means 11 stores the control algorithm, the storage is performed. The presence or absence of the use of the reset means that can return the control algorithm stored in the means 11 to the initial state is confirmed, and if the use of the reset means is not detected, the gas stored in the storage means 11 The process proceeds to STEPB or STEPC (STEP5 to STEP7 in FIGS. 4 and 7) according to the control algorithm corresponding to the cooker or the electric cooker.

  STEP 6 and STEP 7 are the same as STEP 5 to STEP 8 in the first and second embodiments.

  The range hood of the present invention is an optimum operation without depending on the type of the heating cooker by identifying the heating cooker used in the range hood that automatically controls the operation according to the use state of the heating cooker. It is useful for range hoods used in general kitchens.

The figure which shows the main body attachment state of the range hood of Embodiment 1 and 2 of this invention Diagram showing the structure of the same range hood Block diagram showing the configuration of the same range hood Flow chart showing the operation of the same range hood Graph showing an example of the detected temperature when the cooking utensils of the same range hood are left unattended A graph showing an example of the detected temperature when the cooking utensil of the same range hood is removed The flowchart which shows the operation which the same range hood operates automatically The flowchart which shows operation | movement of the range hood of Embodiment 3

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating cooker 2 Fan 3 Temperature detection means 4 Control means 5 Main body 6 Display means 7 Reset means 8 Notification means 9 Calculation means 10 Judgment means 11 Storage means

Claims (13)

A fan installed above a heating cooker such as a gas cooker or an electric cooker, for exhausting oily smoke generated during cooking to the outside, and a temperature detection means for detecting the temperature of the heat source itself on the heating cooker; The heating means comprising a calculation means for calculating a temperature gradient for a predetermined time from the value detected by the temperature detection means, and a control means for operating or stopping the fan, the heating being used from the result derived by the calculation means A range hood characterized by identifying the type of cooking device, selecting a control algorithm set in accordance with the identified cooking device, and performing automatic operation control of the fan according to the control algorithm. 2. The apparatus according to claim 1, further comprising: a determination unit that determines that the heating cooker being used is a gas cooker when the temperature gradient detected by the calculation unit exceeds a preset first threshold value. The described range hood. The range according to claim 1, further comprising: a determination unit that determines that the heating cooker being used is an electric cooker when the temperature gradient detected by the calculation unit falls below a preset first threshold value. hood. Once the cooking device being used is identified, the cooking device is operated for the second and subsequent times by storing the control algorithm set in accordance with the identified cooking device in the storage means built in the computing means. The range hood according to claim 1, wherein the operation of the fan is controlled according to a control algorithm corresponding to the cooking device built in the storage device. 5. The range hood according to claim 4, further comprising reset means for initializing a control algorithm corresponding to the heating cooker identified at the start of operation built in the storage means and selecting the control algorithm again. When it is determined that the cooking device being used is a gas cooking device, the operation by the fan is started when the temperature detected by the temperature detecting means exceeds a preset second threshold value. The range hood according to claim 1. When it is determined that the cooking device being used is an electric cooking device, the operation by the fan is started when the temperature detected by the temperature detection means exceeds a preset third threshold value. The range hood according to claim 1. 2. The range hood according to claim 1, wherein when the temperature gradient detected by the calculation means when using the electric cooker falls below a preset fourth threshold value, the operation control by the fan is stopped. When the temperature detection means exceeds a preset fifth threshold value or falls below a preset fourth threshold value when the temperature detecting means is using the gas cooker, the operation control by the fan is performed. The range hood according to claim 1, which stops. 2. The range hood according to claim 1, wherein when the temperature gradient detected by the temperature detecting means when using the electric cooker falls below a preset fourth threshold value, the operation control by the fan is continued for a predetermined time. . When the temperature detection means exceeds a preset fifth threshold value or falls below a preset fourth threshold value when the temperature detecting means is using the gas cooker, the fan is operated for a predetermined time. The range hood according to claim 1, wherein the control is continued. The range hood according to claim 1, further comprising an informing unit that issues an alarm when the temperature detected by the temperature detecting unit during use of the gas cooker exceeds a preset sixth threshold value. The range hood according to claim 1, further comprising display means for warning when the temperature detected by the temperature detection means when the gas cooker is used exceeds a preset sixth threshold value.

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