JP5536632B2 - Kitchen ventilator - Google Patents

Description

  The present invention relates to a kitchen ventilator for ventilating a commercial kitchen such as a restaurant or an accommodation facility.

  Conventionally, in this type of kitchen ventilator, an exhaust duct that communicates between the inside of the kitchen and the outside, an exhaust fan that is provided in the exhaust duct and exhausts the air in the kitchen to the outside so that the air volume can be changed, and installed in the kitchen A plurality of exhaust hoods that are respectively connected to the exhaust duct and provided between the exhaust hood and the exhaust duct, and an exhaust damper that adjusts an exhaust amount from the exhaust hood. Are known (for example, see Patent Document 1).

  In the kitchen ventilation device, it is possible to adjust the exhaust amount in each exhaust hood by changing the air volume of the exhaust fan and changing the opening degree of each exhaust damper. In this kitchen ventilator, the necessary exhaust amount from the exhaust hood located above the operating cooking appliance is ensured, and the exhaust amount corresponding to the cooking appliance not operating can be reduced. For this reason, in this kitchen ventilator, the operating rate of the exhaust fan can be reduced and the amount of air adjusted by the air conditioner can be reduced as exhaust, so that the energy of the entire air conditioner can be reduced. The consumption can be reduced.

JP 2006-284095 A

  However, in the above-mentioned kitchen ventilator, when the number of exhaust dampers is large or the exhaust air volume adjustment range of the exhaust fan is large, high-performance and complicated control is required to adjust the exhaust amount of each exhaust hood. As a result, the design of the control system becomes complicated and the manufacturing cost may increase.

  An object of the present invention is to provide a kitchen ventilator capable of reducing the operating rate of an exhaust fan to save energy and reducing the manufacturing cost.

The invention according to claim 1 of the present invention includes an exhaust duct that allows communication between the inside of the kitchen and the outside, an exhaust fan that is provided in the exhaust duct and discharges air in the kitchen to the outside so that the air volume can be changed, and the inside of the kitchen. Is installed above the cooking appliances installed in each, and is provided between a plurality of exhaust hoods connected to the exhaust duct and at least one exhaust hood and the exhaust duct to adjust the amount of exhaust from the exhaust hood. In the kitchen ventilator equipped with the exhaust damper, the operating state detecting means for detecting the operating state of the cooking appliance located below each exhaust hood, and the operating state of each cooking appliance detected by the operating state detecting means On the basis of this, the exhaust air flow rate of the exhaust fan is adjusted, and the exhaust air amount control means for controlling the exhaust air amount from each exhaust hood by adjusting the opening degree of the exhaust damper is provided. Detected by the operating state detection means from a plurality of operation modes configured by combining one air volume pattern and one opening pattern from a plurality of air flow patterns of the exhaust fan and a plurality of opening patterns of the exhaust damper. One operation mode is selected based on the operating state of each cooking appliance, and the exhaust amount control means detects an abnormality in either the detection result of the operating state detection means, the exhaust fan drive state, or the exhaust damper drive state. In this case, the operation mode in which the air volume of the exhaust fan and the opening degree of the exhaust damper are maximized is selected .

Further, according to the second aspect of the present invention, there is provided an air flow pattern of the exhaust fan, wherein the plurality of operation modes can change the exhaust amount of the exhaust hood having the largest maximum exhaust amount among all the exhaust hoods. It is a combination with the opening pattern of the exhaust damper.
Moreover, the invention according to claim 3 of the present invention is an exhaust fan in which the plurality of operation modes can change the exhaust amount of the exhaust hood corresponding to the cooking appliance that is not frequently used among all the exhaust hoods. It is a combination of the air volume pattern and the opening pattern of the exhaust damper .
Also, the invention according to claim 4 of the present invention, the air supply fan for supplying outdoor air into the kitchen, the air volume of the air supply fan to control the air supply fan so that less air volume of the exhaust fan And an air supply fan control means.
According to a fifth aspect of the present invention, there is provided a hood temperature sensor for detecting the temperature in each exhaust hood, and the operating state detecting means is provided with a temperature sensor based on the temperature detected by the temperature sensor. It is characterized by detecting whether the cooking appliance located under the exhaust hood is operating.

According to the first aspect of the present invention, even when the number of exhaust dampers is large or the exhaust air volume adjustment range of the exhaust fan is large, it is necessary to select each operation hood only by selecting the operation mode. Since the displacement can be obtained, the design of the control system is simplified and the manufacturing cost can be reduced. In addition, since the exhaust amount from each exhaust hood can be set to the maximum exhaust amount in the event of a failure or the like, it becomes possible to maintain the air condition in the kitchen well regardless of the operating state of each cooking appliance. .

According to the invention described in claim 2 of the present invention, when the cooking appliance corresponding to the exhaust hood having the largest maximum exhaust amount is not in operation, the exhaust amount of the exhaust hood having the largest maximum exhaust amount is reduced to reduce the overall exhaust amount. Since the amount of exhaust gas can be reduced, energy saving can be improved.
According to the invention described in claim 3 of the present invention, the amount of exhaust gas from the corresponding exhaust hood can be reduced over a long period of time when the cooking appliance with low usage frequency is not in operation. It becomes possible to make it .
According to the invention described in claim 4 of the present invention, it is possible to supply an appropriate amount of air supply into the kitchen, and therefore it is possible to maintain a better air condition in the kitchen.
According to the invention described in claim 5 of the present invention, it is possible to detect whether or not each cooking appliance is operating based on the temperature in the exhaust hood. It is possible to detect whether or not the cooking device is operating without being distinguished from the steam cooking device.

It is a schematic block diagram of the kitchen ventilation apparatus which shows one Embodiment of this invention. It is a block diagram which shows a control system. It is a figure which shows determination of the operating condition of a cooking appliance. It is a figure which shows the setting conditions of an exhaust hood. It is a figure which shows an operation mode. It is a figure which shows an operation mode selection process.

  1 to 6 show an embodiment of the present invention.

  As shown in FIG. 1, the kitchen ventilator includes an exhaust system 10 for discharging air in the kitchen 1 and an air supply system 20 for supplying outdoor air into the kitchen 1. . Further, the kitchen ventilation device includes a controller 30 for controlling the operations of the exhaust system 10 and the air supply system 20.

  The exhaust system 10 includes a plurality of exhaust hoods 11 provided above each of the plurality of cooking appliances 2 installed in the kitchen 1, and an exhaust duct 12 for guiding the air sucked from each exhaust hood 11 to the outdoors. The exhaust fan 13 provided in the path of the exhaust duct 12, the exhaust damper 14 provided at the connection portion of each exhaust hood 11 of the exhaust duct 12, and the end of the exhaust duct 12 on the outdoor side. And an exhaust gallery 15. A temperature sensor 16 for detecting the temperature in the exhaust hood 11 is provided in the exhaust hood 11. The exhaust fan 13 is a blower driven by an electric motor and has an inverter device 13a capable of changing the air volume. Each exhaust damper 14 has an electric motor 14a for changing the damper opening. It is desirable that the temperature sensor 16 is located above a portion that becomes hot, such as an exhaust port of the cooking appliance 2 located below.

  The air supply system 20 is provided in the path of the air supply duct 21 for sucking outside air, the air supply duct 22 for guiding the air sucked from the air supply gallery 21 into the kitchen 1, and the air supply duct 22. The air supply fan 23 and the air supply port 24 provided at the end of the air supply duct 22 inside the kitchen 1 are provided. The air supply fan 23 is an electric motor-driven blower, and has an inverter device 23a capable of changing the air volume.

  The controller 30 has a CPU, ROM, and RAM. When the controller 30 receives an input signal from a device connected to the input side, the CPU reads a program stored in the ROM based on the input signal, and stores a state detected by the input signal in the RAM. The output signal is transmitted to a device connected to the output side.

  As shown in FIG. 2, the temperature sensor 16 is connected to the controller 30, and a signal related to the detected temperature T detected by the temperature sensor 16 is input. As shown in FIG. 2, an inverter device 13 a for the exhaust fan 13, an inverter device 23 a for the air supply fan 23, and an electric motor 14 a of each exhaust damper 14 are connected to the controller 30. The controller 30 transmits drive signals to the inverter devices 13a and 23a and the electric motor 14a, and receives signals related to the drive states of the inverter devices 13a and 23a and the electric motor 14a.

  The controller 30 detects whether or not the cooking appliance 2 located below the corresponding exhaust hood 11 is operating based on a change in the detected temperature T of each temperature sensor 16. Specifically, as is apparent from the relationship between the temperature in the exhaust hood 11 and time in FIG. 3, the temperature T detected by the temperature sensor 16 is lower than the operation start determination temperature T1 to be higher than the operation start determination temperature T1. When it rises, it is determined that cooking appliance 2 is operating (points A and C in FIG. 3). In addition, after the detected temperature T of the temperature sensor 16 becomes equal to or higher than the operation start determination temperature T1, the detected temperature T becomes lower than the operation end determination temperature difference ΔT (ΔT> 0) below the operation start determination temperature T1. It is determined that the operation of the cooking appliance 2 has been completed (point B in FIG. 3). The difference between the operation start determination temperature T1 and the operation end determination temperature ΔT is the size of the exhaust hood 11, the fuel consumption of the cooking appliance arranged below the exhaust hood 11, the discharge of cooking exhaust after the operation of the cooking appliance is completed, and the like. Decided in consideration. In FIG. 3, the cooking device 2 continues to operate at a location where the temperature T detected by the temperature sensor 16 is lower than the operation start determination temperature T <b> 1 after time elapses from the point A. This shows a temporary decrease in the temperature in the exhaust hood 11 due to an increase in the displacement.

  The ROM of the controller 30 includes a plurality of air flow patterns of the exhaust fan 13, a plurality of air flow patterns of the air supply fan 23, and a plurality of opening patterns of each exhaust damper 14. A plurality of operation modes configured by combining the air volume pattern of the air supply fan 23 and the opening pattern of each exhaust damper 14 are stored. Each operation mode is determined based on the necessary ventilation amount, the usage frequency, etc. of the cooking appliance 2 corresponding to each exhaust hood 11.

  Specifically, a case where five exhaust hoods 11 (first to fifth exhaust hoods) are provided in the kitchen 1 will be described. As shown in FIG. 4, the five exhaust hoods 11 provided in the kitchen 1 have cooking equipment 2, rated fuel consumption of each cooking equipment 2, exhaust amount, operation start determination temperature T <b> 1, operation end determination temperature, respectively. Conditions such as the difference ΔT and the presence or absence of the exhaust damper 14 are set.

  4, the ROM of the controller 30 has a plurality of air volume patterns of the exhaust fan 13, a plurality of air volume patterns of the air supply fan 23, and a plurality of air dampers 14 as shown in FIG. First to seventh operation modes configured from combinations of opening patterns are stored.

  In FIG. 5, the brazing pan is the cooking device 2 having the maximum required exhaust amount among all the cooking devices 2. The steam kettle is the cooking device 2 having the shortest operating time among all the cooking devices 2. Furthermore, the gas range is a cooking device 2 that requires a relatively large amount of exhaust among all the cooking devices 2 and has a relatively short operation time. Therefore, the first to seventh operation modes have a wide range of exhaust amounts of the third exhaust hood 11 corresponding to the brazing pan, the second exhaust hood 11 corresponding to the steam kettle, and the first exhaust hood 11 corresponding to the gas range, respectively. The operation mode that enables adjustment is configured.

  In each operation mode, the air supply amount of the air supply fan 23 is adjusted to 85% of the exhaust amount of the exhaust fan 13 in order to maintain the negative pressure in the kitchen 1. In the first operation mode, each of the exhaust fan 13 and the air supply fan 23 has the maximum air volume, and the opening degrees of all the exhaust dampers 14 are 100%. In the seventh operation mode, the exhaust amount and the air supply amount that allow the minimum necessary ventilation in the kitchen 1 are set even when all the cooking appliances 2 are not operating.

  In the kitchen ventilator configured as described above, it is detected whether or not each cooking appliance 2 is operating, and the air volume of the exhaust fan 13, the air volume of the air supply fan 23, and each of the cooking appliances 2 according to the operating state of the cooking appliance 2. A ventilation control process for controlling the opening degree of the exhaust damper 14 is performed. The ventilation control process will be described with reference to the flowchart of FIG.

(Step S1)
In step S1, the CPU determines whether or not the operation state of the kitchen ventilator is normal. If it is determined that the operating state is normal, the process proceeds to step S2, and if it is determined that the detected temperature T of the temperature sensor 16 and the drive states of the inverter devices 13a and 23a and the electric motor 14a are not normal, the process proceeds to step S4. Move.

(Step S2)
When it determines with the operation state of a kitchen ventilator in step S1 being normal, CPU detects whether each cooking appliance 2 is operating in step S2.

(Step S3)
In step S3, the CPU selects one operation mode from the seven operation modes based on the operating status of each cooking appliance 2 detected in step S2.
Specifically, for example, when the cooking appliances 2 corresponding to all of the first to fifth exhaust hoods 11 are operating, the first operation mode is selected as shown in FIG. For example, when the cooking appliance 2 corresponding to the first and second exhaust hoods 11 is not operating and the cooking appliance 2 corresponding to the third to fifth exhaust hoods 11 is operating, the third The operation mode is selected.

(Step S4)
If it is determined in step S1 that the operation state of the kitchen ventilator is not normal, in step S4, the CPU has the maximum air flow of the exhaust fan 13 and the air supply fan 23, and the opening of each exhaust damper 14 is maximum. The first operation mode is selected.

(Step S5)
In step S5, the CPU adjusts the air volume of the exhaust fan 13, the air volume of the air supply fan 23, and the opening of each exhaust damper 14 according to the operation mode selected in step S3 or step S4, and ends the ventilation control process. .

  Thus, according to the kitchen ventilator of the present embodiment, by combining one air volume pattern and one opening pattern from a plurality of air volume patterns of the exhaust fan 13 and a plurality of opening patterns of the exhaust damper 14. One operation mode is selected from the plurality of configured operation modes based on the operating state of each cooking appliance 2. As a result, even when the number of exhaust dampers 14 is large or when the adjustment range of the exhaust air volume of the exhaust fan 13 is large, the necessary exhaust amount of each exhaust hood 11 can be obtained by simply selecting the operation mode. As a result, the design of the control system is simplified, and the manufacturing cost can be reduced.

  Further, in the plurality of operation modes, the air volume pattern of the exhaust fan 13 and the opening degree of the exhaust damper 14 that can change the exhaust amount of the exhaust hood 11 having the largest maximum exhaust amount among all the exhaust hoods 11 respectively. It is a combination with a pattern. Thereby, when the cooking appliance 2 corresponding to the exhaust hood 11 having the large maximum exhaust amount is not in operation, the overall exhaust amount can be reduced by reducing the exhaust amount of the exhaust hood 11 having the large maximum exhaust amount. Therefore, it becomes possible to improve energy saving.

  Further, in the plurality of operation modes, the air volume pattern of the exhaust fan 13 and the opening of the exhaust damper 14 that can change the exhaust amount of the exhaust hood 11 corresponding to the cooking appliance that is not frequently used among all the exhaust hoods 11 are provided. It is a combination with the degree pattern. Thereby, since the exhaust amount of the corresponding exhaust hood 11 can be reduced over a long period of time when the cooking appliance 2 with low usage frequency is not in operation, it is possible to improve energy saving.

  When it is determined that the detected temperature T of the temperature sensor 16 and the drive states of the inverter devices 13a and 23a and the electric motor 14a are not normal, the air volume of the exhaust fan 13 and the air volume of the supply fan 23 are maximum, The first operation mode with the maximum opening of the exhaust damper 14 is selected. Thereby, since the exhaust amount from each exhaust hood 11 can be made into the maximum exhaust amount at the time of failure etc., the state of the air in the kitchen 1 is kept favorable irrespective of the operating state of each cooking appliance 2. Is possible.

  In addition, an air supply fan 23 for supplying outdoor air into the kitchen 1 is provided so that the air volume of the air supply fan 23 is equal to or less than the air volume of the exhaust fan 13. Thereby, since an appropriate air supply amount can be supplied into the kitchen 1, it is possible to keep the air state in the kitchen 1 better.

  Moreover, it is detected whether the cooking appliance 2 located below is operating based on the detected temperature T of the temperature sensor 16 provided in the exhaust hood 11. Thereby, since it can be detected whether each cooking appliance 2 is operating according to the temperature in the exhaust hood 11, the cooking appliance 2 is not distinguished between the gas cooking appliance 2 and the electric cooking appliance 2. It is possible to detect whether or not it is operating.

  In the above embodiment, the kitchen is ventilated by the mechanical exhaust of the exhaust fan 13 and the mechanical supply of the air supply fan 23. However, the present invention is not limited to this. For example, even if the kitchen is ventilated by mechanical air supply from the exhaust fan 13 and natural air supply from a supply air gallery or the like, the required exhaust amount of each exhaust hood 11 can be obtained only by selecting the operation mode. Therefore, the design of the control system can be simplified and the manufacturing cost can be reduced.

  Moreover, although the said embodiment showed what judged whether the cooking appliance 2 was operate | moved based on the detection temperature of the temperature sensor 16 provided in the corresponding exhaust hood 11, this was shown. It is not limited to. For example, in the case of the gas cooking appliance 2, the flow rate of the gas supplied to the cooking appliance 2 may be measured. In the case of the electric cooking appliance 2, the power supplied to the cooking appliance 2 is measured. It is possible to detect whether or not the cooking device 2 is in operation even if the cooking device 2 is measured or the on / off of the power source is detected.

  Moreover, in the said embodiment, although the temperature in the exhaust hood 11 was detected and the presence or absence of operation of the cooking appliance 2 was determined, the temperature in the exhaust hood 11 and the temperature in the kitchen 1 outside the exhaust hood 11 Whether or not the cooking device 2 is operating may be detected based on the amount of change in the difference.

  In the above embodiment, the air volume of the air supply fan 23 is set to 85% of the air volume of the exhaust fan 13. However, if the negative pressure in the kitchen 1 can be maintained, this is used. It is not limited.

  Further, in the embodiment, as shown in FIG. 4, the remaining four exhaust hoods 11 except for one for the five exhaust hoods 11 are provided with the exhaust dampers 14, but at least one or more The exhaust hood 11 only needs to be provided with the exhaust damper 14. For example, even if the exhaust dampers 14 are provided for all the exhaust hoods 11, the exhaust amount of each exhaust hood 11 can be controlled. In addition, if the exhaust hood 11 corresponds to the cooking device 2 that has a small effect of reducing the operation rate of the exhaust fan 13 such as the cooking device 2 that requires a small amount of exhaust gas or the cooking device 2 that has a long operating time, two or more exhausts can be used. Even if the exhaust damper 14 is not provided for the hood 11, the same effect can be obtained.

DESCRIPTION OF SYMBOLS 1 Kitchen 2 Cooking apparatus 10 Exhaust system 11 Exhaust hood 12 Exhaust duct 13 Exhaust fan 13a Inverter apparatus 14 Exhaust damper 14a Electric motor 16 Temperature sensor 20 Intake system 22 Intake duct 23 Intake fan 23a Inverter apparatus 30 Controller

Claims (5)

An exhaust duct communicating between the kitchen and the outside;
An exhaust fan that is provided in the exhaust duct and exhausts the air in the kitchen to the outside so that the air volume can be changed;
A plurality of exhaust hoods provided above the cooking appliances installed in the kitchen, each connected to an exhaust duct;
In a kitchen ventilator provided with at least one exhaust hood and an exhaust duct, and an exhaust damper that adjusts an exhaust amount from the exhaust hood,
Operating state detecting means for detecting the operating state of the cooking appliance located below each exhaust hood;
Exhaust amount control that controls the exhaust amount from each exhaust hood by adjusting the air volume of the exhaust fan and adjusting the opening degree of the exhaust damper based on the operating state of each cooking appliance detected by the operating state detection means Means, and
The exhaust amount control means operates from a plurality of operation modes configured by combining one air flow pattern and one opening pattern from a plurality of air flow patterns of the exhaust fan and a plurality of opening patterns of the exhaust damper. One operation mode is selected based on the operating state of each cooking appliance detected by the detection means ,
The exhaust amount control means determines that the exhaust fan air volume and the exhaust damper opening are maximum when an abnormality is detected in either the exhaust fan drive state or the exhaust damper drive state as a result of the operation state detection means. A kitchen ventilator characterized by selecting an operation mode . Each of the multiple operation modes is a combination of an exhaust fan air flow pattern and an exhaust damper opening pattern that can change the exhaust capacity of the exhaust hood with the largest maximum exhaust capacity among all the exhaust hoods. The kitchen ventilator according to claim 1. Multiple operation modes are each a combination of an exhaust fan air flow pattern and an exhaust damper opening pattern that can change the exhaust volume of the exhaust hood corresponding to cooking appliances that are less frequently used in all exhaust hoods. The kitchen ventilator according to claim 1, wherein the kitchen ventilator is provided. An air supply fan that supplies outdoor air into the kitchen;
The air supply fan control means which controls an air supply fan so that the airflow of an air supply fan may become below the airflow of an exhaust fan, The kitchen ventilation of any one of Claim 1 thru | or 3 characterized by the above-mentioned. apparatus. With a hood temperature sensor that detects the temperature in each exhaust hood,
Operating condition detecting means, based on the temperature detected by the temperature sensor, according to claim 1 to 4 Cooking equipment located below the exhaust hood temperature sensor is provided and detects whether running The kitchen ventilator according to any one of the above.

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