JP2658622B2 - Range hood fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood fan that collects and exhausts polluted air such as oily smoke, combustion gas, odor and the like accompanying cooking.

[0002]

2. Description of the Related Art A range hood fan is disclosed in
As disclosed in Japanese Patent Application Laid-Open No. 3-17334, it is based on a configuration in which an exhaust blower is incorporated in a hood structure that collects polluted air such as oil smoke generated by use of a heating cooker so as not to diffuse. . In the above-mentioned publication, the hood and the suction port of the exhaust blower are connected by an extendable duct, so that the height position of the hood can be changed. The duct is provided with a drive unit for expanding and contracting the duct, and a sensor for detecting polluted air is attached to a lower portion of the hood. In this range hood fan, the amount of polluted air generated is sensed by a sensor, the drive unit is controlled according to the amount of polluted air generated, and the position of the hood is set to an appropriate position by the expansion and contraction of the duct. Also, Japanese Patent Application Laid-Open No. Hei 1-210748.
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-260, a heating cooker having a plurality of heating sources is provided with a means capable of specifying an operating heating source, and the amount of air of an exhaust blower is set at a position between a specific heating source and a hood structure. There is also a configuration in which control is performed according to the relationship.

In the conventional range hood fan described above, in the former, the position of the hood can be adjusted in accordance with the amount of polluted air generated, and when the amount of polluted air generated is large, the hood can be brought closer to prevent diffusion of the polluted air. . Further, in the latter, each heating source having a different positional relationship with respect to the fixed hood is specified together with the operation, and the air volume of the exhaust blower is controlled according to the positional relationship of the specific heating source. Efficient ventilation is implemented even when used

[0004]

In the range hood fan as described above, in which the position of the hood can be changed, polluted air is contained in the telescopic portion of the duct for changing the position of the hood, the operating portion of the driving portion, and the like. There is a problem in that highly viscous oil stains such as oil droplets and soot adhere to the duct, and if maintenance is neglected, the operation of the duct frequently occurs. In the case of determining the air volume of the exhaust blower based on the positional relationship of the hood with the source, since the positional relationship is an element for determining the air volume, a ventilation operation deviating from the current state may be performed. In other words, if the heating value of the heating source used is large, the amount of combustion waste gas is large and the amount of polluted air is generally large. However, the heating value of such a heating source is not a factor in determining the air volume.

According to the present invention, for a heating cooker having a plurality of heating sources having different calorific values, the amount of air determined according to the total calorific value of the heating source to be used is changed to a room temperature and a temperature relating to waste heat.
It is an object of the present invention to obtain a range hood fan capable of performing efficient ventilation according to the actual situation, which is capable of performing a ventilation operation while correcting based on the following .

[0006]

A range hood fan according to the present invention uses a control circuit to control an exhaust blower incorporated in a main body mounted above a heating cooker having a plurality of heating sources having different heating values. Basic air flow according to the magnitude of the total heating value of the heating source during operation of the cooking device
Determine the range, within each airflow range of this foundation, the air volume so that the temperature difference between the temperature of the suction portion of each at room temperature and the exhaust blower is the value set in accordance with the magnitude of the total calorific value Controlled.

[0007]

In the range hood fan according to the present invention, a heating source used is specified for a heating cooker having a plurality of heating sources having different calorific values, such as a so-called high calorie burner, a medium calorie burner, and a low calorie burner. The air volume of the exhaust blower is controlled so that the temperature difference between the room temperature and the temperature of the suction portion of the exhaust air blower within the range of the basic air volume according to the total heat value becomes a value set according to the magnitude of the total heat value. Will be.

[0008]

FIG. 1 is a sectional view showing a configuration of a range hood fan as one embodiment of the present invention, FIG. 2 is a plan view of a cooking device, FIG. 3 is a flowchart showing a control sequence, and FIG. FIG. 5 is an explanatory diagram showing trapping efficiency, and FIG. 5 is an explanatory diagram showing control characteristics of the exhaust blower. In FIG. 1, a main body 1 is formed in a box shape, and an exhaust blower 2 is incorporated therein. The exhaust blower 2 has a suction opening facing a suction opening formed in the hood 3 at a lower portion of the main body 1, and an exhaust opening opening at an upper portion, a side portion, or a back surface of the main body 1, and is connected to the outside by connecting a duct. As shown in FIG. 2, the cooking device 4 installed below the hood 3 is arranged side by side on the front side, for example, about 40 mm.
00Kcal high calorie heating source 5 and about 2000K
The calorie heating source 6 of cal.
The low calorie heating source 7 of 00 Kcal has a plurality of heating sources having different calorific values, respectively. Body 1
A control circuit 8 is incorporated in the control circuit 8, and an output of a room temperature sensor 9 for detecting a room temperature and an output of a temperature sensor 10 for detecting a temperature of a suction portion of the exhaust blower 2 are input to the control circuit 8. Further, the outputs of the sensors 11 for detecting the use of these heating sources are input to the control circuit 8 in conjunction with the ignition plugs of the respective heating sources. The air volume of the exhaust blower 2 is controlled.

In the range hood fan having the above-described configuration, the control circuit 8 receives a signal from the sensor 11 output by using each heating source and performs control as shown in FIG. First, the total calorific value of the heating source used by the heating cooker 4 is calculated. If the total calorific value is, for example, 4000 Kcal / h or less, the operation proceeds to the set basic air volume range, that is, the weak air volume range. Within, the speed of the exhaust blower 2 is adjusted so that the difference between the suction temperature and the room temperature is, for example, 16 ° C. Also , for example, from 4000 Kcal / h to 6
If it is between 200 Kcal / h, it will be the set base
Proceeds to operation at medium wind quantity is air volume range, this paralyzed weight range <br/> within the speed regulation of the exhaust air blower 2 as the difference between the suction temperature and the room temperature is for example 20 ° C.. However, the minimum air volume at this time is set to be larger than the air volume set in the low air volume operation. Further, for example the process proceeds to operation at high wind amount is air volume range of the set basis as long 6200Kcal / h or more, in this gale weight range, the exhaust so that the difference between the suction temperature and the room temperature is for example 24 ° C. The speed of the blower 2 is adjusted. However, also at this time, the minimum air volume is set larger than the air volume set in the medium air volume operation. Foundation
Is the air volume range to be considered, how much of the assumed cooking conditions
And cannot be specified as a specific numerical value.
No. The range of air volume is limited by the air volume due to heat in the cooking mode.
Because control is not perfect, the only problem is heat
Instead, odor and water vapor are the major factors.
You. Make sure that only the temperature is sufficient for the shape of the pot and the cooking method.
Because it is difficult, the minimum air volume is particularly limited. Even if the base airflow is determined by the magnitude of the total heating value of the heating source, the temperature difference between the room temperature sensor 9 and the temperature sensor 10 is constant because the adjustment of the heating input and the state of the waste heat vary depending on the cooking content. The air volume is corrected in such a manner that The relationship between the amount of exhaust air, the collection of polluted air, and the efficiency is as shown in FIG. 4, and the control of the exhaust blower 2 has characteristics as shown in FIG. That is, it is possible to control the temperature of the exhaust blower 2 based on the suction temperature and the room temperature while securing the collection efficiency of 100%. In FIG. 5, the solid line indicates this embodiment, and the broken line indicates the case of air blowing control based on the suction temperature and the room temperature. In FIG. 5A, the air volume is too small, and in FIG. In c, the air volume is excessive.

If the fuel input is detected by a sensor linked to the calorific value adjusting section of each heating source, a more accurate total calorific value can be obtained, and a fine-grained and efficient ventilation operation becomes possible. .

[0011]

As is apparent from the above description of the embodiment, according to the present invention, the present invention is applicable to a heating cooker having a plurality of heating sources having different calorific values, such as a high calorie burner, a medium calorie burner and a low calorie burner. The temperature difference between the room temperature and the temperature of the suction part of the exhaust blower is set to a value set according to the magnitude of the total heating value within the range of the base airflow according to the total heating value of the heating source Since the air volume of the exhaust fan is controlled so that it can be adjusted, the air volume can be adjusted by adjusting the heating input according to the content of cooking and the temperature difference between the room temperature and the temperature of the suction part of the exhaust fan even if the state of waste heat varies,
Corresponding to the total heating value of the heating source used, ventilation operation of efficient, low noise was the actual shape is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a range hood fan showing an embodiment of the present invention.

FIG. 2 is a plan view of a cooking device to which the present invention is applied.

FIG. 3 is a flowchart showing a control sequence according to the present invention.

FIG. 4 is an explanatory diagram showing the collection efficiency according to the present invention.

FIG. 5 is an explanatory diagram showing control characteristics of the exhaust blower according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Exhaust blower 3 Food 4 Heating cooker 5 High calorie heating source 6 Medium calorie heating source 7 Low calorie heating source 8 Control circuit 11 Sensor

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-91642 (JP, A) JP-A-55-60143 (JP, A)

Claims (1)

(57) [Claims] An exhaust blower incorporated in a main body mounted above a cooking device having a plurality of heating sources having different heating values is controlled by a control circuit so that the total heating value of the heating source during operation of the cooking device is controlled. Base air flow according to the size of
The range is determined, and the air flow rate is set so that the temperature difference between the room temperature and the temperature of the suction part of the exhaust blower within each of the basic air flow rate ranges is a value set according to the magnitude of the total heat generation. Range hood fan characterized by controlling