JP3859351B2 - Ventilation fan air volume monitoring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air flow monitoring device for a ventilation fan that is provided in the vicinity of a cooking device and monitors the air flow so that a necessary air flow can be obtained from a ventilation fan that can be switched in a plurality of stages.
[0002]
[Prior art]
In the kitchen and kitchen, cooking using various heat sources is performed. During cooking, smoke, steam, or odor is generated, so a ventilation fan for ventilation is often provided near the cooking device. In particular, when the fuel is burned and heated, oxygen in the air is consumed, so that the necessity for ventilation increases, and the installation of a ventilation fan is indispensable in highly sealed houses.
[0003]
FIG. 5 shows a schematic configuration of a gas table 1 as an example of a cooking device provided in a home kitchen. The gas table 1 has a plurality of stoves 2 and 3 and a grill 4. The usage state of the stoves 2 and 3 and the grill 4 changes according to the necessity of cooking. When preparing meals, all the stoves 2, 3 and the grill 4 may be used to the maximum, but for example, only one stove 2 may be used to boil hot water. In some cases, the stoves 2 and 3 and the grill 4 are not used at all. Even if a ventilation fan is provided in the vicinity of the gas table 1 to perform ventilation, the degree of ventilation required varies depending on the operating state of the gas table 1. Although it is necessary to correspond to the operating condition when the gas table 1 is used to the maximum as the capacity of the ventilation fan, such ventilation capacity is excessive when only one stove 2 is used. become. When the air volume of the ventilation fan increases, the amount of noise generated increases and the energy consumption also increases. For this reason, as a ventilation fan, it is preferable that an air volume can be switched in multiple steps. Such a ventilation fan whose air volume can be switched in a plurality of stages is provided with a switch for performing a manual switching operation so that the user of the cooking device can switch the air volume according to the necessity of heating.
[0004]
[Problems to be solved by the invention]
In a conventional kitchen or the like, even if a ventilation fan capable of switching the air volume is installed in the vicinity of the gas table 1 as shown in FIG. 5, the operation must be performed separately from the operation of the gas table 1. Further, when the air volume of the ventilation fan is increased, noise is increased, so that the operation is often performed in a state where the air volume is small. Since the user of the cooking device is paying attention to cooking, it is difficult to pay sufficient attention to obtain the necessary air volume.
[0005]
An object of the present invention is to provide a ventilation fan air volume monitoring device capable of operating a ventilation fan in conjunction with the operation of the heating cooking apparatus and displaying a necessary air volume to a user of the heating cooking apparatus. It is.
[0006]
[Means for Solving the Problems]
The present invention is an air flow monitoring device for a ventilation fan that is provided in the vicinity of a cooking device and can switch the air flow in a plurality of stages by manual operation,
An operation state detecting means for detecting an operation state of the cooking device and deriving a signal representing the operation state;
In response to the signal from the operating state detection means, when the cooking device is operated, the ventilation fan is operated with the air volume switched and set by manual operation, and when the cooking device is stopped, the ventilation fan is turned on. Interlocking means that interlocks the ventilation fan to stop operation,
In response to the signal from the operating state detecting means, based on the operating state of the cooking device, the necessary air volume display means for determining and displaying the required air volume of the ventilation fan ;
An air volume detecting means for detecting which stage the air volume of the ventilation fan is switched to,
The necessary air volume display means compares the required air volume with the air volume stage detected by the air volume detecting means, and displays the air volume monitoring when the air volume is insufficient. Device.
[0007]
According to the present invention, the operation state detection means detects the operation state of the cooking device and derives a signal representing the operation state. In response to the signal from the operating state detection means, the interlocking means operates the ventilation fan to operate the ventilation fan when the cooking apparatus is operated and to deactivate the ventilation fan when the cooking apparatus is stopped. Interlock. When operating the ventilation fan, the interlocking unit operates the ventilation fan with the air volume switched and set by manual operation. The required air volume display means determines and displays the required air volume of the ventilation fan based on the operation state in response to the signal indicating the operation state of the cooking device from the operation state detection means. A display, and go to the optically example, by performing acoustically, to the user of the cooking device performs clarity, can recognize the necessary air volume. In this way, the operation and stoppage of the ventilation fan are linked to the operation and shutdown of the cooking device, and the air volume of the ventilation fan can be manually selected by the user. In addition, the necessary air volume can be displayed by the necessary air volume display means, and the user can be given judgment material for air volume selection.
[0009]
Since the air volume detection means detects which stage the air flow of the ventilation fan being operated is switched to, the required air volume display means compares it with the required air volume, and when the air volume is insufficient, it displays a shortage, The user of the cooking device can perform a switching operation so as to obtain an appropriate air volume based on the display of the air volume shortage.
[0010]
In the present invention, the cooking device performs heating by burning gas fuel with a burner,
The operating state detecting means derives the number and type of burners burned as a signal representing the operating state.
[0011]
According to the present invention, when the gas fuel is burned in the burner and cooked, the number and type of burners burned are derived as signals representing the operating state. The required air volume can be determined and displayed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic electrical configuration of a necessary air volume monitor 10 which is a ventilation air volume monitoring device according to an embodiment of the present invention. As with the gas table 1 shown in FIG. 5, the gas table 11 that is a heating cooking device includes a plurality of, for example, two stoves 12 and 13 and a grill 14. Each stove 12, 13 and grill 14 are provided with temperature sensors 15, 16, 17, respectively, and detect the operating state of the stove 12, 13 and grill 14. A ventilation fan 18 is provided in the vicinity of the gas table 11 and is rotationally driven by electric power supplied from a power source 19 such as commercial AC 100V. The necessary air volume monitor 10 is inserted between the ventilation fan 18 and the power source 19.
[0013]
In the gas table 11, a control device 20 is provided that generates a signal indicating the operation state of the gas table 11 in response to detection outputs of the temperature sensors 15, 16, and 17. The control device 20 derives a signal representing the operation state from the light emitting element 21 as an optical signal. The light emitting element 21 is, for example, a light emitting diode that generates infrared light. The infrared signal generated from the light emitting element 21 is received by the light receiving element 22 provided in the necessary air volume monitor 10. The light receiving element 22 is, for example, a photodiode or a phototransistor, and receives an infrared light signal generated by the light emitting element 21 and converts it into an electrical output. The output from the light receiving element 22 is input to the microcomputer 23. The microcomputer 23 operates according to a program set in advance and performs control as the necessary air volume monitor 10. The required air volume corresponding to the operating state of the gas table 11 is displayed on the display 24, for example. Further, the microcomputer 23 controls the relay 25 in order to interlock the gas table 11 and the ventilation fan 18. The relay 25 is inserted between the power source 19 and the ventilation fan 18, and when the relay 25 is cut off, the operation of the ventilation fan 18 can be stopped.
[0014]
The ventilating fan 18 is provided with a manual changeover switch 26, which can be operated manually to stop the operation of the ventilating fan 18 and to switch between three levels of strong, medium and weak air flow in the operating state. If the ventilation fan 18 is directly connected to the power source 19 without using the necessary air volume monitor 10 as an intermediary, an independent operation can be performed by operating the manual changeover switch 26. In order to switch the air volume in accordance with the operation of the manual switch 26, the output of the manual switch 26 is given to the air volume switching control device 27. The air volume switching control device 27 switches the rotational speed of the fan drive motor 29 that rotationally drives the fan 28 of the ventilation fan 18 according to the air volume.
[0015]
FIG. 2 shows the configuration of the temperature sensor 15 provided in one of the stoves 12, 13, for example, the stove 12, in the gas table 11 of FIG. 1. The same applies to the temperature sensor 16 of the other stove 13. The temperature sensor 15 includes a flame sensor 31 that detects a flame that heats the pan 30 to be heated by the stove 12, and a pan bottom temperature sensor 32 that contacts the bottom surface of the pan 30 and detects the pan bottom temperature. An output representing the temperature detected by the flame sensor 31 and the pan bottom temperature sensor 32 is input to the control device 20. The control device 20 is provided with a microcomputer and operates as the gas table 11 in accordance with a preset program. The flame sensor 31 originally has a function as a extinguishing safety device, and is provided to close the safety valve 33 and stop the supply of gas when the flame disappears due to boiling of moisture in the pot 30. The safety valve 33 can be opened by pressing the ignition / extinguishing button 34. When the ignition / extinguishing button 34 is pressed to supply gas and ignite the gas burner 35, the flame sensor 31 is heated and it can be confirmed that the gas burner 35 is ignited. The pan bottom temperature sensor 32 is originally provided to prevent the pan 30 from being overheated to an ignition temperature of about 350 ° C. when, for example, tempura oil or the like is heated. When the pan bottom temperature sensor 32 detects overheating, the control device 20 closes the safety valve 33 and stops the gas supply.
[0016]
Since the temperatures detected by the flame sensor 31 and the pan bottom temperature sensor 32 also correspond to the operating state of the stove 12, as shown in FIG. 1, the control device 20 sends a flame to the necessary air volume monitor 10 via the light emitting element 21. A signal based on the detected temperatures of the sensor 31 and the pan bottom temperature sensor 32 is derived. The microcomputer 23 of the required air volume monitor 10 determines the required air volume according to a preset table or the like based on the operating states of the stoves 12 and 13 of the gas table 11 and the grill 14.
[0017]
FIG. 3 shows a schematic configuration of a kitchen in which the gas table 11 of FIG. 1 is installed. The gas table 11 is disposed on the cooking table 40, and a range hood 41 is provided above the gas table 11. In the range hood 41, a ventilation fan 18 is installed as a range hood fan. The manual changeover switch 26 of the ventilation fan 18 is installed in the vicinity of the cooking table 40. The necessary air volume monitor 10 is installed adjacent to the manual changeover switch 26, for example. The light receiving element 22 of the necessary air volume monitor 10 is transmitted with a signal representing the operating state by infrared rays from the light emitting element 21 in the gas table 11. The control device 20 in the gas table 11 and the necessary air volume monitor 10 can be connected by wire such as a conductive cable or an optical fiber.
[0018]
FIG. 4 shows a basic operation of the microcomputer 23 in the necessary air volume monitor 10 of FIG. The manual air changeover switch 26 in FIG. 1 performs the interlocking operation on the assumption that the manual air changeover switch 26 is switched to any airflow level and is put into the operating state. When the necessary air volume monitor 10 is connected to the power source 19 in step a1, the operation starts. The necessary air volume monitor 10 always operates as long as it is connected to the power source 19. For this reason, it is preferable that the microcomputer 23 or the like waits in a standby mode with low power consumption and enters a complete operation state when a signal is input from the gas table 11 side. In step a2, it is determined whether a signal from the gas table 11 is received. If not received, the determination is repeated until it is received. This process may be a procedure in which the microcomputer 23 waits in the sleep mode, for example, and cancels the sleep mode and shifts to the next operation mode when a light signal is input to the light receiving element 22. .
[0019]
In step a3, it is determined whether or not the gas table 11 is ignited. When it is ignited, the relay 25 is turned on in step a4. If the manual changeover switch 26 is turned on at any air volume, the relay 25 is turned on and the fan drive motor 29 of the ventilation fan 18 is energized, and the fan 28 is rotationally driven to perform ventilation. In step a5, the required air volume is determined based on the operating state of the gas table 11 represented by the received signal, for example, information such as how many stoves 12 and 13 are operating and the grill 14 is operating. The For example, when one of the stove 12 is for high fire and only the stove 13 is ignited, the exhaust fan 18 can be ventilated with a weak air flow, and when the stove 12 for high fire is ignited, It is necessary to drive with the air volume of In this way, the required air volume varies depending on which of the stove 12 or 13 is ignited. In addition, when two or more stoves 12, 13 and the grill 14 are lit, a table or the like is set so as to increase the air volume.
[0020]
In step a6, the necessary air volume is displayed using the display 24. For example, lamps and light-emitting diodes may be provided for each of the strong, medium, and weak displays, and lighting may be performed according to the required air volume, or a display panel of a liquid crystal display element (LCD) or a light-emitting diode matrix. The necessary air volume can be displayed optically. Alternatively, it may be displayed acoustically using voice or “notification sound”.
[0021]
In step a7, the microcomputer 23 refers to the output of the manual changeover switch 26 and monitors the air volume during operation. In step a8, it is determined whether or not the air volume during operation is smaller than the necessary air volume determined in step a5. When it is determined that the air volume is small, a shortage is displayed on the display 24 in step a9. When step a9 is completed, or when it is determined in step a8 that the operating air volume is not less than the required air volume, the process returns to step a2.
[0022]
In step a3, when any of the stove 12, 13 and the grill 14 is extinguished and a signal indicating that the operation is stopped is received, the relay 25 is controlled to be turned off in step a10, and the fan drive motor 29 is turned off. The power energization is cut off and the operation of the ventilation fan 18 is stopped.
[0023]
In the embodiment described above, the necessary air volume monitor 10 is inserted between the ventilation fan 18 and the power source 19 so that the ventilation fan 18 can be operated alone. However, the function of the necessary air volume monitor 10 is provided in the ventilation fan 18. It can also be incorporated. It is also possible to incorporate the function of the necessary air volume monitor 10 on the gas table 11 side.
[0024]
Further, the present invention can be applied to the case where only the necessary air volume is displayed without performing the operation control linked to the ignition of the gas table 11 with respect to the ventilation fan 18 by the necessary air volume monitor 10. The user of the gas table 11 may operate the manual changeover switch 26 according to the display.
[0025]
【The invention's effect】
As described above, according to the present invention, the ventilation fan can be operated in conjunction with the cooking device, and the air volume at that time can be switched and set by manual operation. Since further appears indispensable air volume of exhaust fan, the user of the cooking device can it to easily grasp the necessary air volume. In this way, the ventilation fan is linked to the cooking device, and the air volume of the ventilation fan can be manually selected by the user, and the necessary air volume is displayed by the necessary air volume display means. Given the material, the user can suitably switch the air volume.
[0026]
Since the display is made indicating a shortage when the air volume is insufficient in comparison to the required air volume in the operating state of the or conversion Kiogi, the user of the cooking device is to solve the lack of air flow, a suitable air volume So that the operation state of the ventilation fan can be switched.
[0027]
Further, according to the present invention, since the operating state is represented by the number and type of burners burned in the cooking device that burns gas fuel, the necessary air volume of the ventilation fan can be appropriately determined.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic electrical configuration of an embodiment of the present invention.
FIG. 2 is a block diagram showing an electrical configuration related to the gas table 11 of FIG. 1;
3 is a perspective view showing an example of the arrangement of the gas table 11 and the ventilation fan 18 of FIG.
4 is a flowchart showing the operation of the microcomputer 23 of FIG.
FIG. 5 is a perspective view showing a configuration of a gas table as an example of a cooking device for heating.
[Explanation of symbols]
10 Necessary air volume monitor 11 Gas table 12, 13 Stove 14 Grill 15, 16, 17 Temperature sensor 18 Ventilation fan 19 Power supply 20 Controller 23 Microcomputer 24 Display 25 Relay 26 Manual changeover switch 28 Fan 29 Fan drive motor 31 Flame sensor 32 Pan bottom temperature Sensor 35 Gas burner 41 Range hood

Claims (2)

An air flow monitoring device for a ventilation fan that is provided in the vicinity of a heating cooking device and can switch air flow in multiple stages by manual operation,
An operation state detecting means for detecting an operation state of the cooking device and deriving a signal representing the operation state;
In response to the signal from the operating state detection means, when the cooking device is operated, the ventilation fan is operated with the air volume switched and set by manual operation, and when the cooking device is stopped, the ventilation fan is turned on. Interlocking means that interlocks the ventilation fan to stop operation,
In response to the signal from the operating state detecting means, based on the operating state of the cooking device, the necessary air volume display means for determining and displaying the required air volume of the ventilation fan ;
An air volume detecting means for detecting which stage the air volume of the ventilation fan is switched to,
The necessary air volume display means compares the required air volume with the air volume stage detected by the air volume detecting means, and displays the air volume monitoring when the air volume is insufficient. apparatus. The cooking device performs heating by burning gas fuel in a burner,
2. The ventilation fan air volume monitoring device according to claim 1, wherein the operating state detecting means derives the number and type of burners burned as a signal representing the operating state .

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