JPH0336801Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention connects a gas supply pipe that supplies fuel gas to a heat cooking device, and connects the gas supply pipe that supplies fuel gas to the heat cooking device, and drains oil, etc. from the exhaust gas from above the heat cooking device. This invention relates to ventilation equipment for a kitchen, which is equipped with a filter that separates and removes dirt, a cleaning device that supplies cleaning liquid to the filter, and a valve mechanism interposed in the cleaning liquid supply pipe to the cleaning device.

(Prior art) In this type of conventional kitchen ventilation equipment, for example,
Clean and remove oil adhering to the filter by supplying cleaning liquid for a certain period of time, or by supplying a certain amount of cleaning liquid at a set time such as after or before using the heat cooking equipment. was.

(Problem to be solved by the invention) However, in the case of the conventional example having such a configuration, the usage conditions of the heat cooking appliance vary from day to day, and as a result, dirt such as oil on the filter can occur. Since the degree of oil and other dirt changes, the setting is made to supply a sufficient amount of cleaning liquid to remove even the most amount of oil and other dirt, based on the case where there is the most amount of oil and other dirt. When the amount of cleaning fluid used is low and there is little dirt such as oil on the filter, more cleaning fluid is supplied than necessary, resulting in wasted cleaning fluid and uneconomical use.In particular, when hot water is used as the cleaning fluid, In this case, the fuel used to obtain the hot water is also wasted, making it even more uneconomical.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to supply the cleaning liquid in just the right amount and to make it possible to clean the filter economically and effectively.

(Means for solving the problem) In order to achieve this purpose, the present invention
In the kitchen ventilation equipment described at the beginning, there is provided a gas usage amount detection means for detecting the gas usage amount, and when a set time comes, the gas usage amount detected by the gas usage amount detection means is read, and the gas usage that has been read is detected. a cleaning liquid supply amount calculation means for calculating a cleaning liquid supply amount corresponding to the amount; and a valve mechanism interposed in the cleaning liquid supply pipe is automatically operated only while supplying the amount of cleaning liquid calculated by the cleaning liquid supply amount calculation means. and a cleaning liquid supply control means that opens to the cleaning liquid supply control means.

(Function) According to the above configuration, for example, when the set time comes after or before the use of the heat cooking appliance, the gas usage amount detection means detects the period from the previous cleaning process to that point in time. The cleaning liquid supply amount calculation means calculates the cleaning liquid supply amount corresponding to the detected gas amount, and the cleaning liquid supply control means supplies the calculated amount of cleaning liquid to the filter based on the detected gas amount. It is possible to wash and remove dirt such as oil that has adhered to the product.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic cross-sectional view showing a kitchen ventilation equipment according to an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of the main parts. In these figures, reference numeral 1 denotes a heat cooking device, and a gas supply pipe 2 for supplying fuel gas is connected to the heat cooking device 1, and a gas meter 3 for measuring the amount of gas to be supplied is connected to the gas supply pipe 2. equipped.

A ventilation hood 4 is attached above the heat cooking appliance 1, and a main body casing 5 for ventilation is provided within the ventilation hood 4, and an exhaust gas supply port is provided on each of the left and right sides of the upper part of the main body casing 5. 6 is formed, and a filter 7 is attached below each of the supply ports 6, 6 to separate and remove dirt such as oil from the exhaust gas,
By driving the exhaust fan 8, the exhaust gas generated from the heat cooking device 1 is transferred from the supply ports 6, 6 to the filter 7,
7 and is configured to be discharged from the damper 9 to the outside via a duct 10.

A cleaning nozzle 1 for supplying cleaning liquid to the filters 7, 7 is provided above each of the filters 7, 7.
1 is attached, and cleaning nozzles 11, 11
and a hot water tank 12 are connected to each other via a cleaning liquid supply pipe 13 and a pump 14, and, for example, hot water of about 50° C. is sprayed and supplied as a cleaning liquid to wash and remove dirt such as oil attached to the filters 7, 7. The cleaning device 15 is configured to do this.

A solenoid valve 16 as a valve mechanism is interposed in the cleaning liquid supply pipe 13.

In the figure, reference numeral 15a denotes a discharge pipe for discharging to the outside the drained liquid from which dirt such as oil has been washed and removed.

17 is a controller, and this controller 17 includes a CPU 18, ROM 19, RAM 20,
A driver 21 is also provided that outputs an opening/closing operation output to the electromagnetic valve 16.

As shown in FIG. 3, the CPU 18 is equipped with a gas usage amount detection means 22, a cleaning liquid supply amount calculation means 23, and a cleaning liquid supply control means 24.

The gas usage amount detection means 22 includes a gas meter 3
The amount of gas supplied from a set time (first cleaning time to be described later) to a set time on the next day is calculated and detected based on the gas supply amount measured by the controller.

The cleaning liquid supply amount calculation means 23 reads the gas usage amount detected by the gas usage amount detection means 22 at a set time, and calculates the cleaning fluid supply amount corresponding to the read gas usage amount. There is. Specifically, based on the read gas usage amount, if there is a corresponding cleaning liquid supply amount that matches the gas usage amount, that cleaning liquid supply amount is read from the ROM 19, and the cleaning liquid supply amount is read out from the ROM 19, and If there is no corresponding cleaning fluid supply amount, select two cleaning fluid supply amounts that are close to it.
The cleaning liquid supply amount corresponding to the gas usage amount is calculated by reading from the ROM 19 and performing proportional calculations from these cleaning liquid supply amounts.

The cleaning liquid supply control means 24 calculates a time sufficient to supply the cleaning liquid in the amount based on the cleaning liquid supply amount calculated by the cleaning liquid supply amount calculation means 23, and controls the cleaning liquid via the driver 21 for the calculated time. An operating output is output to the solenoid valve 16, the solenoid valve 16 is automatically maintained in an open state, and a predetermined amount of cleaning liquid calculated as described above is supplied to the filter 7.

Next, regarding the control operation of the CPU 18, the fourth
This will be explained using the flowchart shown in the figure.

After initialization (S1), read the gas usage amount and save the read gas usage amount as memory.
Store in RAM 20 (S2).

Next, it is determined whether a preset first cleaning time has arrived, such as 11:30 p.m., when kitchen use ends (S3), and when the cleaning time has arrived, the gas usage at that time is determined. Gas meter 3
(S4), reads out the gas usage amount stored in the RAM 20, and calculates the difference between the read gas usage amount and the gas usage amount read in step S4 (S5). The processing from step S3 to step S5 is referred to as gas usage amount detection means 22.
The above-mentioned determination as to whether the cleaning time has come is made by using a day timer (24-hour timer) or the like and outputting an "H" level output when the set time has arrived.

Thereafter, the cleaning liquid supply amount calculating means 23 reads out the corresponding cleaning liquid supply amount from the ROM 19 based on the difference in the calculated gas consumption amount, and calculates the cleaning liquid supply amount corresponding to the gas consumption amount from the read cleaning liquid supply amount. The amount of cleaning liquid to be supplied is determined, and the cleaning liquid supply time required to supply that amount of cleaning liquid is calculated (S6).

After that, clear the gas usage amount stored in RAM20 and read the gas usage amount from RAM20.
20 (S7), and the driver 21
Outputs the operating output from and opens the solenoid valve 16 (S8),
The open state is maintained for the cleaning liquid supply time described above (S9), and after the cleaning liquid supply time has elapsed, that is,
After supplying a predetermined amount of cleaning liquid, the solenoid valve 16 is closed (S10). The processing from step S8 to step S10 is referred to as cleaning liquid supply control means 24.

When it is determined in step S3 that the first cleaning time has not arrived, the process proceeds to step S11, where it is determined whether or not the second cleaning time, such as 8 a.m., which is before the start of use, has arrived; When the second cleaning time comes, the solenoid valve 16 is opened for a set time to supply a set amount of cleaning liquid to the filters 7, 7, and remove minute particles that have adhered after the previous cleaning liquid was supplied. . The amount of cleaning liquid supplied here is extremely small compared to the amount supplied at the first cleaning time described above.

With the above control operation, after using the heat cooking appliance 1, when the set time comes, an appropriate amount of cleaning liquid is automatically supplied to each of the filters 7, 7, and the oil adhering to each of the filters 7, 7 is removed. It cleans and removes dirt.

In the above embodiment, the supply of an appropriate amount of cleaning liquid is controlled by the supply time of the cleaning liquid, but in the present invention, for example, a flow meter is interposed in the cleaning liquid supply pipe 13, and a solenoid valve is installed. The electromagnetic valve 16 may be configured to integrate the cleaning liquid supply amount after opening the cleaning liquid supply amount calculation means 23, and close the electromagnetic valve 16 when the amount calculated by the cleaning liquid supply amount calculating means 23 is reached.

In the above embodiment, a day timer is used to automatically supply the cleaning liquid at the set time, but the present invention also includes a switch for starting cleaning, and the cleaning liquid is automatically supplied at the set time when the switch is turned on. The system may be configured to perform cleaning automatically, or a sensor may be provided to detect when the main stop of the gas supply pipe 2 is closed, and the cleaning may be performed automatically at a set time when this sensor detects the closed state of the main stop. You may also perform cleaning.

The cleaning liquid may be warm water, water, or boiling water, or may be mixed with a detergent. Further, steam may be supplied as the cleaning liquid.

(Effects) As described above, according to the present invention, the longer the usage time, that is, the greater the amount of gas used, the greater the difference between the usage status of the heat cooking appliance and the degree of dirt on the filter. We focused on the fact that there is a proportional relationship between the amount of gas used and the amount of dirt on the filter, so we supply cleaning fluid in an amount that corresponds to the amount of gas used. It is possible to supply a large amount of cleaning liquid when the filter is dirty, and a small amount of cleaning liquid when the filter is not very dirty.It is possible to supply just the right amount of cleaning liquid depending on how dirty the filter is, making cleaning the filter economical and possible. I am now able to do it well.

[Brief explanation of drawings]

Figure 1 is a schematic cross-sectional view showing an embodiment of the kitchen ventilation equipment of the present invention, Figure 2 is a vertical cross-sectional view of the main parts of Figure 1, and Figure 3 is a block diagram showing the internal configuration of the CPU. FIG. 4 is a flowchart explaining the control operation of the CPU. 1... Heat cooking equipment, 2... Gas supply pipe, 7...
Filter, 13... Cleaning liquid supply pipe, 15... Cleaning device, 16... Solenoid valve as a valve mechanism, 22...
. . . Gas usage amount detection means, 23 . . . Cleaning liquid supply amount calculation means, 24 . . . Cleaning liquid supply control means.

Claims (1)

[Scope of Claim for Utility Model Registration] A gas supply pipe that supplies fuel gas to a heat cooking device is connected, and a filter is attached above the heat cooking device to separate and remove dirt such as oil from the exhaust gas. , in the kitchen ventilation equipment, which is equipped with a cleaning device that supplies cleaning liquid to the filter, and in which a valve mechanism is interposed in the cleaning liquid supply pipe to the cleaning device, a gas usage amount detection means for detecting the amount of gas usage; At the set time, reading the gas usage amount detected by the gas usage amount detection means,
a cleaning liquid supply amount calculation means for calculating a cleaning liquid supply amount corresponding to the read gas consumption amount; and a cleaning liquid supply amount calculation means that automatically operates the valve mechanism only while supplying the amount of cleaning liquid calculated by the cleaning liquid supply amount calculation means. A ventilation system for a kitchen, characterized in that it is equipped with a cleaning liquid supply control means that opens.