JP7198974B2 - Range food - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood fan and an exhaust path configuration, which are provided above kitchen appliances such as a gas stove and an electromagnetic cooker to collect smoke and hot air generated during cooking and discharge them to the outside.

Conventionally, as a method to reduce the amount of oil dust adhering to the fan of a range hood and to reduce the frequency of maintenance, a disk-shaped rotatable filter was installed upstream of the exhaust fan to capture the oil dust in the exhaust gas. A cooker hood is known in which oil dust collected by rotating a disk-shaped filter at high speed during exhaust operation is collected by an oil-collecting member (see, for example, Patent Document 1). The range hood will be described below with reference to FIG.

As shown in FIG. 8, an exhaust fan 105, a disk-shaped filter 110 upstream of the fan 105, and a motor 111 for rotating the filter at high speed are provided, and the disk-shaped filter 110 is rotated at high speed during exhaust operation. As a result, it is possible to reduce the amount of oily dirt adhering to the fan and prevent clogging of the filter.

JP 2018-40565 A

In such a conventional range hood, the motor for rotating the disk-shaped filter at high speed consumes power in addition to the motor for the exhaust fan, so the power consumption during operation is large. There is a problem that noise is generated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cooker hood capable of reducing noise and power consumption.

In order to achieve this object, a range hood according to an aspect of the present invention includes a hood body having an intake port and an exhaust port, a fan built into the hood body, and a control unit that controls the air volume of the fan . , the axial direction of the fan is horizontal, the air blown out from the discharge port of the fan is blown upward in the vertical direction and is exhausted from the exhaust port, and the control unit has a normal operation mode and an oil and a scattering operation mode, in which the oily smoke sucked from the suction port is discharged from the exhaust port in the normal operation mode, and in the oil splashing operation mode, the fan is operated at a rotation speed higher than that in the normal operation mode, and the fan is turned off. After receiving the signal, if the oil-splashing operation mode is in operation , the fan will be operated at a speed lower than that in the oil-splashing operation mode for a certain period of time, and then the operation will be terminated without leaving the fan to stop. When operating in the operation mode, if the elapsed time from the start of operation in the normal operation mode is less than a certain time, the operation in the normal operation mode is terminated without performing the residual operation and the oil splashing operation mode, If the elapsed time exceeds a certain period of time, the remaining operation is carried out, and then the operation mode is shifted to the oil splashing operation mode, thereby achieving the intended purpose.

According to the present invention, the amount of oil dust adhered to the exhaust fan can be reduced by blowing away the oil dust dirt once adhered to the fan by the oil splashing operation. In addition, since it is not necessary to rotate the disk-shaped filter at high speed, it is possible to provide a range hood that consumes less power during operation.

1 is an external perspective view of a cooker hood according to Embodiment 1 of the present invention. Disassembled perspective view of the range hood Cross-sectional view of the range hood as viewed from the front Detailed cross-sectional view of the same range hood as seen from the front Cross-sectional view of the range hood as seen from the side Block diagram of oil splashing operation control of the range hood Image diagram of blower static pressure - air volume characteristic curve Side cross-sectional view showing conventional technology

A cooker hood according to an aspect of the present invention includes a hood body having an intake port and an exhaust port, a blower built into the hood body, and a control unit for controlling the air volume of the blower, and the axial direction of the blower is The air blown from the outlet of the blower in the horizontal direction is blown upward in the vertical direction and is exhausted from the outlet, and the control unit has a normal operation mode and an oil splashing operation mode, The normal operation mode is a mode in which the oily smoke sucked in through the suction port is exhausted through the exhaust port, and the oil-spattering operation mode is a mode in which the blower is operated at a higher (larger) rotation speed than in the normal operation mode. As a result, by rotating the blower at high speed in the oil-splashing operation mode, dirt such as oil attached to the blower is blown off, thereby improving the ease of maintenance. In addition, by setting the rotation axis of the fan in the horizontal direction and blowing out upward (installing the fan vertically), it is possible to increase the distance between the fan and the oil collecting mechanism, which reduces noise. It has the effect of becoming

Moreover, the structure which transfers to oil-spattering operation mode after completion|finish of normal operation mode may be sufficient. As a result, dirt such as oil that adheres in the normal operation mode is blown off each time the fan is operated, and dirt is less likely to accumulate on the fan.

In addition, an oil collection mechanism is provided to collect oil contained in the oily smoke sucked in from the suction port, and the casing having the oil drain hole contains the blower, and the oil contained in the oily smoke sucked in from the suction port is removed. Alternatively, the oil may adhere to the inner wall of the casing and then pass through the oil drain hole and be collected by the oil collecting mechanism. As a result, there is an effect that the oil blown off in the oil splashing operation mode can be efficiently collected by the oil collecting mechanism.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
A range hood according to an aspect of the present invention is provided above kitchen appliances (not shown) such as a gas stove and an IH stove. The cooker hood has a hood body 1, a straightening plate 4, an oil collection mechanism 9, and a controller (not shown).

The hood body 1 has a suction port 2 for sucking contaminated air and an exhaust device 3 (duct cover). The exhaust device 3 has a fan 5 , a fan motor 11 and a casing 6 . The fan 5 is provided inside the hood body 1 and exhausts the air sucked from the suction port 2 . The fan 5 is provided with a discharge port so as to blow upward in the vertical direction. The rotation axis direction of the fan 5 is horizontal. The term "horizontal" as used herein includes not only a perfectly horizontal surface, but also a surface that is inclined by about 10 degrees from the horizontal surface (see FIG. 5B). In this way, by tilting the fan 5 forward from the horizontal direction, the attachment/detachment of the fan 5 is improved.

A casing 6 encloses the fan 5 . The casing 6 has a continuous wall surface through which oil stains blown off by an oil splashing operation described later flows down to the oil collecting mechanism 9, and an oil drain hole 10 at the bottom. The oil drain hole 10 is provided at, for example, the center of the lower portion of the casing 6 and above the oil collection mechanism portion 9 . Oil stains adhering to the wall surface of the casing 6 are guided along the wall surface of the casing 6 to the oil drain hole 10 at the bottom, as indicated by arrow A in FIG. Then, the oil drips from the oil drain hole 10 to the oil collection mechanism portion 9 . In this way, by forming the surface that flows down the wall surface of the casing 6 with a curved surface, the oily dirt can be efficiently collected in the oil collection mechanism portion 9 . That is, the oil dust dirt blown off by the oil splashing operation described later flows downward along the wall surface of the casing 6 and can be efficiently collected in the oil collection mechanism portion 9 . In addition, since the oil directly flows down to the oil collection mechanism 9 from the oil drain hole 10 provided in the casing 6, the range hood is easy to clean and minimizes the number of constituent members that become contaminated during the oil collection process. can provide.

The operation of the fan motor 11 causes the fan 5 to rotate.

The oil collecting mechanism part 9 is attached to the hood body 1 . The oil collection mechanism 9 is provided below the casing 6 . Even if the oil collection mechanism 9 has a box shape, for example, and air containing oil stains flows into the inside and comes into contact with the inner wall of the oil collection mechanism 9, the oil is collected. good.

The straightening plate 4 is, for example, rectangular and is attached to the suction port 2 . Air flows into the suction port 2 from around the current plate 4 .

An exhaust port 12 communicating with the outside through a duct or the like is provided on the top surface of the exhaust device 3 .

A ventilation passage is formed inside the hood body 1 and the exhaust device 3 to connect the suction port 2 and the exhaust port 12 via the fan 5 .

The oil collection mechanism 9 is made of metal, for example, and is provided between the fan 5 and the suction port 2, and collects oily smoke generated from kitchen appliances and dust floating around.

The control unit has a normal operation mode and an oil splashing operation mode.

The normal operation mode is a mode in which the fan 5 operates to suck in contaminated air from the suction port 2 and exhaust it from the exhaust port 12 . In the normal operation mode, the configuration may be such that the user can select any one of "weak, medium, and strong" operations with different rotational speeds of the fan 5. FIG. At this time, for example, the operation is such that the fan speed increases in the order of low, medium, and high.

Alternatively, the configuration may be such that the remaining operation is performed in the normal operation mode. Here, the residual operation means an operation in which the fan 5 is operated for a certain period of time after receiving the "off" signal, that is, the fan stop signal, and then the fan 5 is stopped.

The oil splashing operation mode is a mode in which the fan 5 is rotated at high speed each time the normal operation mode ends, thereby blowing off oil dust stains. The rotation speed of the fan 5 in the oil splashing operation mode is, for example, 1200 r/min. The number of rotations of the fan 5 in the oil splashing operation mode is higher than that in the normal operation mode, particularly in the leaving operation.

Here, the normal operation mode and the oil splashing operation mode will be explained using FIG.

After starting the operation, the control unit detects whether the operation is in the normal operation mode. If it is not in the normal operation mode (for example, if it is operating in the oil splashing operation mode), after receiving the "OFF" signal, the operation is terminated without performing the remaining operation.

When operating in one of the "weak, medium, and strong" normal operation modes, the control unit detects whether the normal operation mode has been operating for a certain period of time. If the fan 5 has not been operated for a certain period of time, after receiving the "off" signal, the fan 5 is stopped without performing the remaining operation, and the operation is terminated. If the "off" signal is received after operating in the normal operation mode for more than a certain period of time, the remaining operation is performed. Then, after the leaving operation is performed, the normal operation mode is changed to the oil splashing operation mode. Then, in the oil splashing operation mode, the fan 5 is rotated at a higher speed than (higher than) the normal operation mode or at the maximum rotation speed of the normal operation mode for several seconds to perform the oil splashing operation. After finishing the oil splashing operation, the fan 5 is stopped and the operation is finished.

The "off" signal may be a fan stop signal from the control unit of the cooker hood or a fan stop signal from the associated cooking appliance.

With the above configuration, dirt such as oil that adheres in the normal operation mode is blown off each time the blower is operated, so dirt does not easily accumulate on the blower, and the ease of maintenance by the user is improved. In addition, with this configuration, it is not necessary to separately mount a motor that rotates the disk-shaped filter at high speed, so it is possible to provide a cooker hood that reduces power consumption during operation.

Further, as shown in FIG. 5, the distance between the oil collecting mechanism 9 and the fan 5 is increased by installing the fan 5 so as to blow upward (vertically). By disposing the oil collecting mechanism 9 and the fan 5 apart from each other in this way, the ventilation resistance is lowered, and the effect of noise reduction is exhibited.

Here, the relationship between the decrease in airflow resistance and the decrease in noise will be described with reference to FIG.

In a certain operating state, it is used at the intersection point A between the "static pressure-airflow characteristic" of the blower and the airflow resistance. Here, when the airflow resistance decreases, the use point moves to the intersection point B along the static pressure-airflow characteristic, but the use point moves to C due to the control to keep the airflow constant. Since use point C operates at a lower rotation speed than point A, it has the effect of reducing noise.

As described above, in the range hood according to the present embodiment, the distance between the fan and the filter is increased, so that the ventilation resistance is reduced and noise can be reduced.

As described above, the cooker hood according to the present invention has been described based on the embodiment, but the present invention is not limited to the embodiment. As long as it does not deviate from the spirit of the present invention, the present embodiment includes various modifications that a person skilled in the art can think of, and the form constructed by combining the components of different embodiments is also included in the scope of the present invention. .

Since the cooker hood according to the present invention reduces adhesion of oil stains to the air blower, it is also useful for cabinets and the like installed on the wall surface of the kitchen.

REFERENCE SIGNS LIST 1 hood body 2 suction port 3 exhaust device 4 current plate 5 fan 6 casing 9 oil collecting mechanism 10 oil drain hole 11 fan motor 12 exhaust port

Claims (2)

a hood body having an inlet and an outlet;
a fan built into the hood body;
A control unit that controls the air volume of the fan ,
the axial direction of the fan is horizontal;
the air blown out from the outlet of the fan is blown upward in the vertical direction and exhausted from the outlet;
The control unit has a normal operation mode and an oil splashing operation mode,
In the normal operation mode, the oil smoke sucked from the suction port is exhausted from the exhaust port,
In the oil splashing operation mode, the fan is operated at a higher rotational speed than in the normal operation mode,
After receiving the fan cut-off signal,
When the engine is operating in the oil-splashing operation mode, the fan is operated at a rotation speed lower than that in the oil-splashing operation mode for a certain period of time, and then the operation is terminated without performing the residual operation in which the fan is stopped ,
When operating in the normal operation mode, if the elapsed time from the start of operation in the normal operation mode is less than a certain time, the normal operation mode is performed without performing the remaining operation and the oil splashing operation mode. is completed, and if the elapsed time exceeds the predetermined time, the range hood is shifted to the oil splashing operation mode after the remaining operation is performed. An oil collection mechanism that collects oil contained in oily smoke sucked from the suction port,
The fan is enclosed in a casing having an oil drain hole,
2. The oil collecting mechanism according to claim 1, wherein the oil contained in the oily smoke sucked from the suction port adheres to the inner wall of the casing and then passes through the oil drain hole and is collected by the oil collection mechanism. range hood.

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