JPH09243067A - Air supply and exhaust amount variable controller for kitchen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air supply and exhaust amount variable controller for a kitchen which makes it possible to attempt to conduct energy conservation by reducing the huge air conditioning energy dissipated in a business kitchen for a hotel and the like. SOLUTION: In the kitchen having heat cooking devices 2, 3 using gas and electricity and installed, an exhaust hood 9 provided at the upper part to exhaust at the time of using the devices 2, 3 and a conditioned air supply unit 14 for supplying the air to meet the exhaust amount, the air supply and exhaust amount variable controller comprises a gas flowmeter 6 and an ammeter 8 for detecting the gas amounts and electric amounts used for the devices 2, 3, and a controller 24 for controlling the ventilating amount by variably setting the numbers of revolutions of the exhaust hood 9 and the air supply fan 19 of the unit 14 under a predetermined reference in response to the detected values.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supply / exhaust amount variable control device for a kitchen, which is capable of significantly reducing air-conditioning energy for outdoor air treatment in a commercial kitchen in a hotel, restaurant or the like.

[0002]

2. Description of the Related Art The energy cost of processing outdoor air in a commercial kitchen in a hotel or the like is apparent from the calculation example of the exclusive area, air conditioning heat source pump load, and air conditioning power shown in FIG. In addition, the air conditioning energy cost of the entire hotel accounts for a very large weight. According to the example shown in the figure, the heat source load ratio reaches 28% and the air conditioning power ratio reaches 43% even though the area ratio occupied by the kitchen is only 5%.

This requires a large amount of energy for ventilation and air conditioning because a kitchen, a stove, a fryer, a pottery, and many other types of heat cookers that generate oil fumes that adversely affect the working environment are used in the kitchen. This is considered to be the factor. Usually, in such a kitchen, an exhaust hood that operates when the heat cooker is used to exhaust air is provided on the upper part of the heat cooker, and an external air conditioner that supplies air corresponding to the amount of exhaust is installed to install the kitchen hood. It is designed to supply and exhaust air.

In this case, if the supply / exhaust air has a constant air volume, the energy consumption is inevitably large as described above. Therefore, it is desirable that the supply / exhaust air be controlled by a variable air volume according to the usage of the heat cooker. , It has already been proposed to control the air supply and exhaust air volume by varying the amount of gas used in the heat cooker. However, in recent years, the number of electrified kitchens has tended to increase, so that a sufficient energy-saving effect cannot be obtained only by controlling the variable air volume by detecting the gas volume.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to reduce the enormous amount of air conditioning energy consumed in commercial kitchens, especially in hotels, and to save energy by controlling the supply / exhaust volume control device in the kitchen. To provide. Another object of the present invention is to provide a supply / exhaust amount variable control device in a kitchen, which can perform the same control both automatically and manually.

[0006]

In order to solve the above-mentioned problems, a supply / exhaust flow rate variable control device for a kitchen according to the present invention is provided with a heat cooker using gas and electricity, and the heat cooker is provided above the heat cooker. A gas that detects the amount of gas and the amount of electricity used in the heat cooker in a kitchen equipped with an exhaust hood that operates when the cooker is used to exhaust air, and that also supplies air in proportion to the amount of exhaust A flow meter and an ammeter are provided, and a controller for varying the number of revolutions of the exhaust fan of the exhaust hood and the air supply fan of the external air conditioner based on a certain standard according to the detected values and controlling the ventilation amount is provided. According to the amount of gas and the amount of electricity used in the gas and electricity heat cooker, for example, the ratio of the amount of gas and the amount of electricity to the rated value of the output, based on a certain standard. Ventilation volume is controlled by the total value of The Rukoto, since its function can be achieved in the required minimum ventilation can be greatly reduced air conditioning energy kitchen.

Further, the supply / exhaust amount variable control device in the kitchen according to the present invention is provided with a manual switch for forcibly starting / stopping the exhaust fan and the supply fan via the controller and controlling the air amount in the exhaust hood. With a manual switch at hand,
It is also possible to forcibly adjust the ventilation volume at hand while feeling the cooking and environmental conditions on the skin.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
It will be described based on. FIG. 1 is a configuration diagram showing a configuration of a supply / exhaust amount variable control device in a kitchen according to an embodiment of the present invention.

Reference numeral 1 denotes a commercial kitchen such as a hotel in which a cooking table 4 having a gas heat cooker 2 using gas and an electric heat cooker 3 using electricity is installed. Gas is supplied to the gas heat cooker 2 through a gas pipe 5 and a gas flow meter 6, and electricity is supplied to the electric heat cooker 3 through an electric wiring 7 and an ammeter 8. It is supposed to be done.

An exhaust hood 9 is provided on the upper part of the cooking table 4 so that oil smoke produced by cooking on the cooking table 4 can be sucked in and exhausted to the outside through an exhaust duct 10 and an exhaust fan 11. And this exhaust duct 10
A damper 12 is provided therein, and the exhaust fan 11 is composed of a fan whose rotation speed is variably controlled by an inverter 13.

Further, outside the kitchen 1, there is provided an external air conditioner 14 for cooling or heating the outside air in proportion to the amount of exhaust by the exhaust hood 9 and supplying the outside air as cold air or warm air. The external air conditioner 14 includes a cold water coil 16 for cooling the outside air introduced via the damper 15, a hot water coil 17 for heating the outside air, and
It is provided with an air supply fan 19 for supplying cold air or hot air cooled or heated by the cold water coil 16 or the hot water coil 17 into the kitchen 1 through the duct 18.

A cold water valve 2 is provided on the cold water coil 16 of the external conditioner 14.
Cold water is supplied through 0 and hot water is supplied to the hot water coil 17 through the hot water valve 21, and the air supply fan 19 is composed of a fan whose rotation speed is variably controlled by an inverter 22. Further, a supply air temperature thermostat 23 for detecting the supply air temperature is installed in the duct 18 so that cold air or warm air having a set temperature can be supplied.

Further, there is provided a controller 24 for controlling the amount of exhaust air by the exhaust hood 9 and the amount of air supply by the external air conditioner 14 to control the ventilation amount and temperature in the kitchen 1. The controller 24 inputs the detected values of the gas flow meter 6, the ammeter 8 and the supply air temperature thermostat 23 and controls the cold water valve 20 and the hot water valve 21 based on the detected values to control the supply air temperature to the set temperature. , Gas heat cooker 2
And the amount of gas and electricity used in the electric heat cooker 3,
It has the function of controlling the ventilation volume under a certain standard that the ventilation volume is controlled by the total value of the ratio of the gas volume and the electricity volume to the rated value.

However, in the exhaust hood 9, unless the wind speed of the suction part of the hood is kept above a certain value, it is impossible to collect the oil smoke and exhaust it. Therefore, the minimum wind speed for securing the surface wind speed of the hood is required. Set the ventilation volume (about 70%) in advance so that it does not fall below that level.
When the gas heat cooker 2 and the electric heat cooker 3 that emit oil smoke are not used, the ventilation volume is configured to be reduced to the minimum air volume (about 10%).

Further, the exhaust hood 9 is provided with a manual switch 25 capable of manually controlling the ventilation amount to be high, medium, or low. By manually operating the manual switch 25, the exhaust air is exhausted via the controller 24. Fan 11,
It controls the damper 12, the damper 15, and the air supply fan 19,
It is configured to forcibly control the ventilation volume to be strong, medium, or weak.

However, according to the above-described embodiment, when the gas heat cooker 2 and the electric heat cooker 3 are not used in the kitchen 1, the kitchen 1 is ventilated with the minimum air volume, The cool air or the warm air having a predetermined temperature processed by the external air conditioner 14 is supplied and air-conditioned. When the gas heat cooker 2 and the electric heat cooker 3 are used for cooking, a large amount of heat is generated, and at the same time, the amount of gas and the amount of electricity used are detected by the gas flow meter 6 and the ammeter 8. It is input to the controller 24.

Here, the controller 24 ventilates with a combined value of the ratio of the output of the gas quantity and the quantity of electricity to the rated value according to the quantity of gas and the quantity of electricity used in the gas heat cooker 2 and the electric heat cooker 3. The rotation speed and the opening degree of the exhaust fan 11, the damper 12, the damper 15, and the air supply fan 19 are calculated based on a fixed standard of controlling the amount, and the inverters 13 and 2 are calculated.
By controlling the number of revolutions of the exhaust fan 11 and the air supply fan 19 via 2 and controlling the opening degree of the damper 12 and the damper 15, the ventilation amount is variably controlled according to the generated oil smoke and heat.

Therefore, the ventilation volume can be constantly suppressed to the minimum necessary, and the heat source load can be reduced and the air conditioning power can be reduced. Therefore, the air conditioning energy such as the outside air treatment can be greatly reduced. Energy saving and cost reduction can be achieved. In particular, even in the recent trend of increasing the number of electrified kitchens, the ventilation amount can be variably controlled by detecting the amount of electricity used, so that a sufficient energy saving effect can be expected.

On the other hand, in addition to the above-described automatic control by detecting the gas amount and the electric amount, the manual switch 25 installed on the exhaust hood 9 can be operated at hand to increase the ventilation amount.
It can be controlled as medium and weak. Therefore, it is possible to forcibly adjust the ventilation amount at hand while feeling the cooking and environmental conditions with the skin.

When controlling the ventilation volume,
It is desirable to control with an integral value so that the ventilation volume does not change instantly. Moreover, the control of the ventilation volume is
It is desirable to zone each kitchen section,
Further, when the cold water coil 16 is used under the outside air condition, it is important to control the supply air temperature so that the cold air can be supplied within the range of the dry coil so that energy is not consumed for dehumidification.

[0021]

As described above, according to the supply / exhaust amount variable control device in the kitchen according to the present invention, a constant reference value is set according to the gas amount and the electric amount used in the thermal cooker using gas and electricity. Since the ventilation amount can be controlled based on the original value, the ventilation amount can be suppressed to the necessary minimum. Therefore, the air-conditioning energy of the kitchen can be significantly reduced, and a great energy saving effect and cost reduction effect can be expected, and it is possible to cope with the recent increasing tendency of the electrified kitchen. Is obtained. Further, since the manual switch is provided, the ventilation amount can be forcibly adjusted even at hand.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of a supply / exhaust amount variable control device in a kitchen according to an embodiment of the present invention.

FIG. 2 is a diagram showing a calculation example of an exclusive area, air conditioning heat source pump load, and air conditioning power in a hotel.

[Explanation of symbols]

 1 Kitchen 2 Gas Heat Cooker 3 Electric Heat Cooker 6 Gas Flow Meter 8 Ammeter 9 Exhaust Hood 11 Exhaust Fan 14 External Air Conditioner 19 Air Supply Fan 24 Controller 25 Manual Switch

Claims (2)

[Claims] 1. A heat cooker using gas and electricity is installed, and an exhaust hood is installed on the upper part of the heat cooker to operate and exhaust air when the heat cooker is used. In a kitchen equipped with a controller, a gas flow meter and an ammeter for detecting the amount of gas and the amount of electricity used in the heat cooker are provided, and the exhaust fan of the exhaust hood is set based on a certain standard according to the detected values. And a controller for varying the number of revolutions of the air supply fan of the external air conditioner to control the ventilation amount. 2. The kitchen according to claim 1, wherein the exhaust hood is provided with a manual switch for forcibly starting and stopping the exhaust fan and the air supply fan and controlling the air volume through the controller. Supply and exhaust amount variable control device.