JPH0336802Y2 - - 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 that large amount of oil and other dirt, based on the case where there is the most 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.

Furthermore, if the heat cooking appliance is heavily used and is heavily contaminated with oil or the like, the amount of cleaning liquid needed to separate and remove it from the filters may be larger than necessary.

The present invention was devised in view of the above circumstances, and the purpose of the present invention is to supply an appropriate amount of cleaning liquid at an appropriate time so that the filter can be cleaned economically and efficiently. shall be.

(Means for solving the problem) In order to achieve this purpose, the present invention
The kitchen ventilation equipment described at the beginning includes a gas usage amount detection means for detecting the gas usage amount, and a set amount of cleaning liquid is supplied when the gas usage amount detected by the gas usage amount detection means exceeds a set amount. and cleaning liquid supply control means.

(Function) According to the above configuration, for example, each time the amount of gas used reaches a set amount as the heat cooking appliance is used, the valve mechanism is automatically activated, or the notification means such as a buzzer is activated. Therefore, the cleaning liquid supply control means can control the set amount by opening the valve mechanism upon knowing that the amount of gas used has reached the set amount, and then automatically closing the valve mechanism after the set amount of cleaning liquid is supplied. By supplying a cleaning liquid to the filter, it is possible to wash and remove dirt such as oil adhering to the filter.

(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. from the supply ports 6, 6 to the filters 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 includes a gas usage amount detection means 22 and a cleaning liquid supply control means 2.
3 are provided.

The gas usage amount detection means 22 includes a gas meter 3
Based on the amount of gas supplied by the controller, the amount of gas used since the last cleaning is calculated and detected.

The cleaning liquid supply control means 23 compares the gas usage amount detected by the gas usage amount detection means 22 with the gas usage amount set in advance by the setting device 24 using a comparator 25, and determines the detected gas usage amount. When the amount of gas used reaches the set gas usage amount, a comparison output is output and the timer 26
, outputs operating output to the solenoid valve 16 via the driver 21 for a time sufficient to supply the set amount of cleaning fluid, automatically maintains the solenoid valve 16 in an open state, and supplies the set amount of cleaning fluid to the filter. 7. The gas usage amount set by the setting device 25 may be changed as appropriate depending on the size, properties, etc. of 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 store the read gas usage amount as memory in RAM20.
(S2).

Next, the gas usage amount detection means 22 reads the gas usage amount from the gas meter 3 (S3), calculates the difference between the gas usage amount and the gas usage amount stored in the aforementioned memory (S4), and determines the gas usage amount. is detected, and the calculated usage amount difference, which is the gas usage amount, is compared with the set amount set by the setting device 24 (S5).

When the detected gas usage amount exceeds the set amount, the process moves to step S6, where the gas usage amount stored in the RAM 20 is cleared (S6), and the read gas usage amount is stored in the RAM 20 (S7).

After that, the timer 26 is started (S8), the driver 21 outputs an operating output to open the solenoid valve 16 (S9), and the open state is maintained for a set time (S10), and after the set time has elapsed, that is, After supplying the set amount of cleaning fluid, the timer 26 is reset (S11) and the solenoid valve 16 is closed (S12). The processing from step S8 to step S12 is referred to as cleaning liquid supply control means 24.

With the above control operation, as the set amount of fuel gas is used in the thermal cooking appliance 1, the set amount of cleaning liquid is automatically supplied to each of the filters 7, 7, and the oil etc. adhering to each of the filters 7, 7 is removed. It cleans and removes dirt.

In the above embodiment, the supply of a set 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 an electromagnetic The solenoid valve 16 may be configured to integrate the amount of cleaning liquid supplied after opening the valve 16 and close the electromagnetic valve 16 when the amount reaches the amount set by the cleaning liquid supply control means 23.

In the above embodiment, the cleaning liquid supply control means 23
is configured to automatically supply a set amount of cleaning liquid as the gas usage amount detected by the gas usage amount detection means 22 exceeds a set amount;
In the present invention, for example, the gas usage amount detection means 2
When the detected gas usage amount in step 2 exceeds a set amount, the system is equipped with a notification means such as a buzzer or a lamp to notify this, and after the solenoid valve 16 is artificially opened, the set amount of cleaning liquid is supplied. Solenoid valve 1 after
6, and the notifying means and the valve closing means constitute a cleaning liquid supply control means. It may be configured such that a set amount of cleaning liquid can be automatically supplied by opening the solenoid valve 16.

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 larger 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, as we said when the filter becomes extremely dirty. The cleaning solution can be supplied to the filter before the filter is so dirty that it becomes difficult to remove it, and the cleaning solution can be supplied at the appropriate time without unnecessary supply when the filter is lightly soiled. It has become possible to clean the filter economically and efficiently by supplying an appropriate amount of cleaning liquid to the filter.

[Brief explanation of the drawing]

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 control means.

Claims (1)

[Claims for Utility Model Registration] (1) A gas supply pipe that supplies fuel gas to a thermal cooking appliance is connected, and a filter is installed above the thermal cooking appliance to separate and remove dirt such as oil from the exhaust gas. Gas usage amount detection for detecting gas usage amount in kitchen ventilation equipment, which is also attached with a cleaning device that supplies cleaning liquid to the filter, and a valve mechanism is interposed in the cleaning liquid supply pipe to the cleaning device. A ventilation system for a kitchen, comprising: means for controlling the supply of cleaning liquid for supplying a set amount of cleaning liquid when the gas usage amount detected by the gas usage amount detection means exceeds a set amount. (2) The kitchen ventilation equipment according to claim 1, wherein the cleaning liquid supply control means automatically opens the valve mechanism only while supplying a set amount of cleaning liquid. (3) The cleaning liquid supply control means includes a notification means for notifying that the amount of gas used detected by the gas usage amount detection means exceeds a set amount, and a set amount of cleaning liquid is supplied after the valve mechanism is opened. and a valve-closing means that automatically closes the valve mechanism after the utility model has been registered.
Ventilation equipment for kitchens as described in section.