JPH05312368A - Air supplying and discharging method and air supplying and discharging device for kitchen room - Google Patents

Abstract

PURPOSE:To contrive energy saving and the improvement of environment by a method wherein the opening degrees of dampers, provided in respective hoods, and the angle of dampers in an exhaust duct as well as an air supplying duct are set in accordance with the amount of burnt gas respectively. CONSTITUTION:A control means 15 sets the opening degrees of dampers 14a, 14b, 14c, installed in air discharging branch ducts 5a, 5b, 5c provided in respective hoods 3a, 3b, 3c, in accordance with the amount of discharging air corresponding to the amount of burnt gas in respective cooking instruments 2a, 2b, 2c. The control means 15 sets also the opening degree of the damper 12 of an exhaust duct 4 so as to obtain the amount of discharging air coping with the total amount of burnt gas or the amount of discharging air corresponding to 2O-110 times of the amount of logical burnt gas in the amount of full combustion, for example, and sets the opening degree of the damper 13 of an air supplying duct 7 so as to obtain the amount of supplying air coping with the amount of discharging air. According to this method, atmosphere is improved so that heating load will never be increased even in winter, feets of cooker will never be cold and cooking products will never be cooled so soon in winter while energy saving can also be contrived.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for supplying / exhausting a kitchen room.

[0002]

2. Description of the Related Art Combustion exhaust gas and cooking exhaust gas discharged from cooking equipment in a kitchen room, particularly in a commercial kitchen room such as a restaurant or hotel, are installed above the cooking equipment by operating an exhaust fan. It is collected by an existing hood, collected in an exhaust duct, and discharged outdoors. At the same time, outside air and conditioned air in an adjacent room or the like are supplied to the kitchen room through an air supply duct or the like.

FIG. 2 shows a conventional example of such an air supply / exhaust system. In the figure, reference numeral 1 indicates a kitchen room, and a plurality of cooking appliances 2a, 2 are provided in the kitchen room 1.
b, 2c are installed, and the hood 3a,
3b and 3c are provided. These hoods 3a, 3b,
3c is connected to the exhaust duct 4 via branch ducts 5a, 5b, 5c, and the exhaust duct 4 is provided with an exhaust fan 6. On the other hand, reference numeral 7 is an air supply duct, and an air supply fan 8 is provided in the air supply duct 7. The exhaust fan 6 and the air supply fan 8 are configured to be manually operated by operating the respective operation switches 9 and 10, and always operate at a constant rotation speed during operation. In addition, a grease removing device 21 for removing oil and fat contained in cooking exhaust gas is provided in the hood 3 as required, and the branch ducts 5a, 5b, 5c are also provided.
Is equipped with fire dampers 11a, 11b, 11c,
It is configured to automatically close in the event of a fire.

In the above structure, when the exhaust fan 6 and the air supply fan 8 are operated during the use of the cooking equipment, the amount of exhaust air is always constant regardless of the usage state of the cooking equipment 2a, 2b, 2c. Is exhausted in an amount 20 to 40 times the theoretical combustion gas amount at the time of rated combustion of the entire cooking appliance. At the same time, the amount of air supplied in proportion to the amount of exhaust air is supplied through the air supply duct 7 and the like.
Air-conditioned air in an adjacent room or the like is used.

[0005]

In a commercial kitchen room, the amount of combustion gas at the time of rated combustion of the entire cooking appliance is large, so the amount of exhaust gas and the amount of air supply set to 20 to 40 times that amount are also set. The amount of exhaust air and the amount of supplied air are always constant regardless of the state of use of the cooking equipment. Therefore, if you are using cooking equipment on low heat, or when the number of units used is small,
Exhaust air and air supply in excess of the required amount will be performed at that time.

Therefore, there are the following problems. Air conditioning load in the kitchen room or the adjacent room is increased by exhausting the air-conditioned air more than necessary. Especially in the winter, if a large amount of cold outside air is supplied to the kitchen as it is, the cook's feet will get cold and the cooked food will easily become cold.To solve this, the outside air is heated to supply air. Doing so will increase the heating load. The present invention aims to solve such conventional problems.

[0007]

In order to solve the above-mentioned problems, first, in the present invention, an exhaust duct provided with an exhaust fan and an air supply duct provided with an air supply fan are constructed, and
In the air supply / exhaust device having a structure in which each hood provided corresponding to each of a plurality of exhaust categories set for a plurality of cooking appliances in a kitchen room is connected to the exhaust duct via a branch duct, the exhaust duct A remote control damper is provided in each of the air supply duct and each branch duct, and a flow rate detecting means is provided in the fuel gas supply path so that the flow rate of the fuel gas to the cooking appliance can be detected for each exhaust section. Provided, based on the flow rate of the fuel gas detected by the flow rate detecting means, while controlling the opening degree of the damper of each branch duct in accordance with the combustion gas amount of the cooking equipment of each exhaust section in a corresponding relationship with the flow rate, We propose a method for supplying and exhausting gas to and from a kitchen room, which controls the opening of dampers of the exhaust duct and the air supply duct in accordance with the total amount of combustion gas, which is the sum of the amount of combustion gas of each cooking appliance.

In this air supply / exhaust method, the total amount of combustion gas is calculated from the sum of the flow rates of the fuel gas detected by the flow rate detecting means, and is obtained from this sum, or the total amount of combustion gas is provided on the upstream side of each fuel gas supply path. The total flow rate detection means is provided in the fuel gas supply common path, and it is obtained from the total flow rate of the fuel gas detected by this total flow rate detection means, or the combustion gas amount of each cooking appliance obtained from the flow rate of the fuel gas detected by the flow rate detection means. Can be obtained by calculating the sum of.

Further, according to the present invention, as an apparatus to which the above method is applied, an exhaust duct provided with an exhaust fan and an air supply duct provided with an air supply fan are configured, and are set for a plurality of cooking appliances in a kitchen room. In each of the exhaust duct, the air supply duct and each branch duct, in the air supply / exhaust device in which each hood provided corresponding to each of the plurality of exhaust sections is connected to the exhaust duct through the branch duct. A damper that can be operated remotely is provided, and a flow rate detecting means is provided in the fuel gas supply path to each cooking appliance, and the damper of the damper is based on the flow rate of the fuel gas to the cooking appliance of each exhaust section detected by the flow rate detecting means. An air supply / exhaust device for a kitchen room is proposed which is provided with a control means for controlling the opening degree.

In this air supply / exhaust device, a total flow rate detecting means is provided in the fuel gas supply common path on the upstream side of each fuel gas supply path, and for the dampers of the exhaust duct and the air supply duct, the control means controls all the exhaust gas and the air supply duct. The opening degree can be controlled based on the total flow rate detected by the flow rate detecting means.

[0011]

[Function] The combustion gas amount of cooking equipment belonging to each exhaust classification is
It can be determined based on the flow rate of fuel gas to the cooking appliance. Therefore, based on the flow rate of the fuel gas detected by the flow rate detection means for each exhaust section, if the opening degree of the damper in the branch duct corresponding to the cooking equipment of those exhaust section is controlled, those opening degrees can be adjusted. It can be appropriately adjusted according to the actual combustion gas amount of the cooking appliance for each section.

On the other hand, the combustion gas amount of the entire cooking appliance, that is, the total combustion gas amount is the sum of the combustion gas amounts of the cooking appliances, and therefore corresponds to the total combustion gas amount obtained based on the flow rate of the fuel gas. By controlling the opening degrees of the dampers of the exhaust duct and the air supply duct, the exhaust gas amount and the air supply amount can be appropriately adjusted according to the actual total combustion gas amount.

Since the total combustion gas amount is the sum of the combustion gas amounts of the cooking appliances of all the exhaust gas categories, the sum total of the fuel gas flow rates detected by the flow rate detecting means for each exhaust gas category is calculated, and from this total sum. Or, the total flow rate detection means is provided in the fuel gas supply common path on the upstream side of each fuel gas supply path,
It can be obtained from the total flow rate of the fuel gas detected by the total flow rate detection means, or can be obtained by calculating the sum of the combustion gas amounts of the cooking appliances obtained from the flow rate of the fuel gas detected by the flow rate detection means.

[0014]

EXAMPLE An example of the present invention will be described with reference to FIG. The same components as those in FIG. 2 are designated by the same reference numerals. That is, reference numeral 1 in FIG.
Indicates a kitchen room, and a plurality of cooking appliances 2a, 2b, 2c are installed in the kitchen room 1, and foods 3a, 3b, 3c are provided above the cooking equipments 2a, 3b, 3c, respectively. , 3c are exhaust categories. That is, in this embodiment, the exhaust classification is the cooking appliances 2a, 2
It is configured for each of b and 2c. In addition, the exhaust section can be configured such that a plurality of cooking appliances belong to one exhaust section. Each hood 3a, 3 for each exhaust section
b and 3c are connected to the exhaust duct 4 via branch ducts 5a, 5b and 5c, and the exhaust duct 4 is provided with an exhaust fan 6. On the other hand, reference numeral 7 is an air supply duct, and an air supply fan 8 is provided in the air supply duct 7. A damper 1 that can be remotely operated on the downstream side of the exhaust duct 4, the upstream side of the air supply duct 7, and each of the branch ducts 5a, 5b, 5c.
2, 13, 14a, 14b and 14c are provided. These dampers 12, 13, 14a, 14b, 14c are configured to be remotely operable by using motor-driven dampers, that is, motor dampers, and this remote operation is performed by the control means 1.
It is the structure performed by 5. On the other hand, the exhaust fan 6 and the air supply fan 8 can be configured to be operated by appropriate operating means. Next, reference numerals 16a, 16b and 16c are fuel gas supply pipes to the respective cooking appliances 2a, 2b and 2c. It is provided.
The flow rate signals from these flow rate detecting means 17a, 17b, 17c are input to the control means 15. In the figure, reference numeral 18 is a fuel gas supply pipe 16a, 1
Fuel gas supply pipes on the upstream side of 6b and 16, 19 is a wall, 2
Reference numeral 0 is a ceiling, and 21 is a grease removing device.

In the above construction, the control means 15 can grasp the use condition of each cooking appliance 2a, 2b, 2c moment by moment based on the flow rate signals from the flow rate detecting means 17a, 17b, 17c. That is, each cooking equipment 2a, 2b,
Since the flow rate of the fuel gas supplied to 2c and the combustion gas amount are in a proportional relationship, the control means 15 can determine the combustion gas amount of each cooking appliance 2a, 2b, 2c based on the respective flow rate signals. Moreover, each of these cooking appliances 2a, 2b, 2
From the sum of the combustion gas amounts of c, the combustion gas amount of the cooking appliance as a whole, that is, the total combustion gas amount can be obtained.

Therefore, the control means 15 controls the cooking appliances 2a,
Corresponding to the combustion gas amount of 2b, 2c, each branch duct 5
Remotely controllable damper 14 installed on a, 5b, 5c
a, 14b, 14c are controlled to set their opening to an opening corresponding to the exhaust gas amount corresponding to the combustion gas amount of each cooking appliance 2a, 2b, 2c. That is, the opening degree of the damper corresponding to the cooking appliance with a large combustion gas amount is set to a large value, and conversely, the opening degree of the damper corresponding to the cooking appliance with a small combustion gas amount or being stopped is reduced or closed. .. At the same time, the control means 15 adjusts the opening degree of the damper 12 of the exhaust duct 4 so as to obtain an exhaust amount corresponding to the total combustion gas amount, for example, an exhaust amount 20 to 40 times the theoretical combustion gas amount in the total combustion amount. The opening degree of the damper 13 of the air supply duct 7 is set so that an air supply amount corresponding to this exhaust amount can be obtained.

As described above, since the opening degree of the damper 12 of the exhaust duct 4 is set momentarily based on the actual total combustion gas amount, the exhaust gas amount and the air supply amount are always required depending on the total combustion gas amount. Can be set to a minimum. And since the opening degree of damper 14a, 14b, 14c of each hood 3a, 3b, 3c is set according to the combustion gas amount of each corresponding cooking appliance 2a, 2b, 2c, each hood 3a, 3b, 3c.
Therefore, the exhaust can be performed at an appropriate rate.

As described above, the total amount of combustion gas is the total amount of combustion gas of each cooking appliance. Therefore, the total amount of fuel gas flow detected by the flow rate detecting means is calculated and obtained from this total. , The fuel gas supply pipes 16a,
A total flow rate detection means is provided in the fuel gas supply pipe 18 upstream of 16b, 16c so that the total flow rate of the fuel gas detected by this total flow rate detection means can be obtained, or by the flow rate detection means 17a, 17b, 17c. It is possible to calculate and obtain the total sum of the combustion gas amounts of the cooking appliances 2a, 2b, 2c obtained from the flow rate of the fuel gas.

Further, the control means 15 does not necessarily have to obtain the combustion gas amount in the above-mentioned control, and can control the fuel gas flow rate detected by the flow rate detection means 17a, 17b, 17c as it is.

[0020]

As described above, according to the present invention, the opening degree of the damper corresponding to each hood is set according to the actual combustion gas amount of the cooking equipment of each exhaust section, and the exhaust gas from these hoods is collected. Since the opening degree of the damper in the exhaust duct is set corresponding to the total combustion gas amount, the exhaust amount and the air supply amount can be set to the necessary minimum.

Therefore, the following energy saving effect and environmental improvement effect can be obtained. Air-conditioned air in the kitchen room, the adjacent room, or the like is not exhausted more than necessary, so that the air-conditioning load can be reduced. Even in the winter, without increasing the heating load,
It is possible to prevent inconveniences such as the feet of a cook or the like becoming cold or the cooked product easily cooled.

[Brief description of drawings]

FIG. 1 is a system explanatory view showing an example of a supply / exhaust system to which the present invention is applied.

FIG. 2 is a system explanatory view showing an example of a conventional air supply / exhaust system.

[Explanation of symbols]

 1 Kitchen Room 2a, 2b, 2c Cooking Equipment 3a, 3b, 3c Hood 4 Exhaust Duct 5a, 5b, 5c Branch Duct 6 Exhaust Fan 7 Air Supply Duct 8 Air Supply Fan 9 Operation Switch 10 Operation Switch 11a, 11b, 11c Damper 12 Remotely controllable damper 13 Remotely controllable damper 14a, 14b, 14c Remotely controllable damper 15 Control means 16a, 16b, 16c Fuel gas supply pipes 17a, 17b, 17c Flow rate detection means 18 Fuel gas supply pipe 19 Wall 20 Ceiling 21 grease removing device

Claims (6)

[Claims] 1. An exhaust duct provided with an exhaust fan and an air supply duct provided with an air supply fan are provided, and provided corresponding to each of a plurality of exhaust sections set for a plurality of cooking appliances in a kitchen room. In the air supply / exhaust device having a structure in which each hood is connected to the exhaust duct via a branch duct, a damper that can be remotely operated is provided to each of the exhaust duct, the air supply duct, and each branch duct, and the fuel gas is supplied. The path is provided with a flow rate detecting means so that the flow rate of the fuel gas to the cooking appliance can be detected for each exhaust section, and has a correspondence relationship with the flow rate based on the flow rate of the fuel gas detected by the flow rate detecting means. The opening of the damper of each branch duct is controlled according to the combustion gas amount of the cooking equipment of each exhaust classification, and the exhaust duct and the supply are supplied corresponding to the total combustion gas amount which is the sum of the combustion gas amount of each cooking equipment. Air duct da A method of supplying and exhausting a kitchen room characterized by controlling the opening of the damper 2. The method according to claim 1, wherein the total combustion gas amount is obtained from the sum of the flow rates of the fuel gas detected by the flow rate detecting means, and is obtained from this sum. How to supply and exhaust 3. The method according to claim 1, wherein a total flow rate detecting means is provided in the fuel gas supply common path upstream of each fuel gas supply path, and the total combustion gas amount is determined by the total flow rate detecting means. A method for supplying and exhausting gas to and from a kitchen, which is obtained from the total flow rate of the detected fuel gas 4. The exhaust gas supply / exhaust method according to claim 1, wherein the total combustion gas amount is obtained by calculating a sum of combustion gas amounts of the respective cooking appliances obtained from the flow rate of the fuel gas detected by the flow rate detecting means. Air supply / exhaust method for kitchen rooms 5. An exhaust duct provided with an exhaust fan and an air supply duct provided with an air supply fan are configured, and provided corresponding to each of a plurality of exhaust sections set for a plurality of cooking appliances in a kitchen room. In an air supply / exhaust device in which each hood is connected to the exhaust duct through a branch duct, a damper that can be remotely operated is provided in each of the exhaust duct, the air supply duct, and each branch duct, and each cooking appliance Is provided in the fuel gas supply path to the exhaust gas, and control means is provided for controlling the opening degree of the damper based on the flow rate of the fuel gas to the cooking appliance of each exhaust section detected by the flow rate detecting means. Characteristic kitchen room air supply and exhaust device 6. The air supply / exhaust device according to claim 5, wherein a total flow rate detecting means is provided in a fuel gas supply common path upstream of each fuel gas supply path, and dampers for the exhaust duct and the air supply duct are: The control means is configured to control the opening degree based on the total flow rate detected by the total flow rate detection means.