JP6752521B2 - Ventilator - Google Patents

Description

The present invention relates to a ventilation device, and more particularly to a ventilation device used together with a cooking device or the like.

As a ventilation device used for the purpose of discharging indoor air to the outside, a ventilation device having a structure provided with a backwind stopper for preventing backflow of air from the outside to the room is widely used.

As such a ventilation device, Patent Document 1 discloses a ventilation device (mist bath device) provided with a headwind stopper in the exhaust path from the ventilation fan to the outside.

Although this Patent Document 1 does not provide a detailed description of the headwind stop, it is possible to suppress or prevent the inflow of air from the outside to the room by providing the backwind stop in the exhaust path from the ventilation fan to the outside. It is thought that

Usually, the above-mentioned outdoor is often outdoors, and according to the ventilation device of Patent Document 1, it is meaningful to be able to suppress and prevent the inflow of low-temperature air from the outdoors into the room in winter. ..

Japanese Unexamined Patent Publication No. 2014-004095

By the way, in the ventilation device of Patent Document 1, when the ventilation fan is stopped, or when a strong wind blows outdoors, the pressure inside the room (indoor) may be higher than the pressure outside (outdoor). Then, in such a case, a situation may occur in which the indoor (indoor) air is discharged to the outdoor (outdoor) even though the user does not desire it. That is, the headwind stop has the function of inflowing air from the outside (outdoor) into the room (indoor), but does not have the function of suppressing or preventing the outflow of air from the room (indoor) to the outside (outdoor). ..

Then, for example, when the indoor (indoor) is heated in winter, if the indoor (indoor) air is discharged to the outdoor (outdoor), energy loss due to the heating will occur, which is not preferable. There is a point.

The present invention solves the above-mentioned problems, and even when the pressure in the room becomes higher than the pressure in the room while the ventilation fan is stopped, the air in the room is discharged to the outside against the intention of the user. It is an object of the present invention to provide a ventilation device capable of suppressing the accumulation.

In order to achieve the above object, the ventilation system of the present invention
It is a ventilation device configured to exhaust the indoor air to the outside through the exhaust passage by driving the exhaust fan.
A backwind stop that regulates backflow, which is the flow of air from the exhaust passage to the ventilation fan, in a closed state where at least a predetermined region is formed of a ferromagnetic material.
An electromagnet that attracts the predetermined region formed from the ferromagnetic material of the headwind stopper by a magnetic force generated by energization of a direct current to maintain the counterwind stopper in the closed state is provided.
By stopping the energization of the direct current to the electromagnet and releasing the magnetic force generated in the electromagnet, the backflow stop is opened, and the air in the room passes through the exhaust passage by driving the ventilation fan. It is configured to allow it to flow and be discharged outdoors, as well as
The electromagnet is provided with a protruding portion that protrudes toward the headwind stopper, and the protruding portion has a sharp tip portion that comes into contact with the headwind stopper.

Further, it is preferable that the ventilation device of the present invention is provided with a plurality of the protruding portions.

As described above, the ventilation device of the present invention includes a backwind stop and an electromagnet, and is configured to attract the backwind stop by the magnetic force generated by energizing the electromagnet with a direct current to maintain the backwind stop in a closed state. Therefore, even if the pressure inside the room becomes higher than the pressure outside the room while the ventilation fan is stopped, the air inside the room will be discharged to the outside against the intention of the user. It becomes possible to suppress.
Moreover, since the contact portion of the electromagnet that comes into contact with the headwind stopper includes a protruding portion having a sharp tip, small dust may enter between the headwind stopper and the electromagnet, or the headwind stopper or the headwind of the electromagnet may enter. Even if dirt such as an oil film adheres to the contact part with the stopper, the electromagnet will surely contact the headwind stopper at the sharp tip of the protrusion, so it depends on the electromagnet (magnetic force). It is possible to improve the reliability of suction holding of the headwind stopper.

Therefore, according to the present invention, even when the pressure inside the room becomes higher than the pressure outside the room while the ventilation fan is stopped, the air inside the room is discharged to the outside against the intention of the user. It becomes possible to provide a ventilation device capable of suppressing the storage.

In the present invention, at least a predetermined region of the headwind stopper may be formed of a ferromagnet attracted by the magnetic force of the electromagnet, and the other portion may not be formed of the ferromagnet. However, the present invention does not exclude the case where the entire headwind stopper is formed of a ferromagnet, and the present invention also includes a configuration in which the entire headwind stopper is formed of a ferromagnet.

Further, in the present invention, the "pointed tip portion in contact with the headwind stopper" provided in the protruding portion protruding toward the headwind stopper of the electromagnet means, for example, a tip portion such as the apex of a cone or a pyramid. However, the specific shape does not necessarily have to be a neat shape such as the tip region including the vertices of a cone or a pyramid, and small dust may enter between the headwind stopper and the electromagnet, or the headwind stopper may be used. Even if dirt such as an oil film adheres to the electromagnet, the shape may be such that the contact between the electromagnet and the headwind stopper can be ensured.

Further, in the ventilation device of the present invention, it becomes possible to make the contact between the protruding portion and the headwind stopper more reliable, and the present invention can be further effective.

It is a notch front view of the ventilation system (range hood) which concerns on one Embodiment of this invention. It is a front sectional view around the exhaust duct in the closed state of the headwind stopper of the ventilation system (range hood) which concerns on one Embodiment of this invention. It is a front sectional view around the exhaust duct in the open state of the headwind stopper of the ventilation system (range hood) which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be shown, and the features thereof will be described in more detail.

[Embodiment]
In this embodiment, a ventilation device used as a range hood will be described as an example.

As shown in FIG. 1, the ventilation device (range hood) 110 according to the embodiment of the present invention is installed and used in the kitchen together with a gas stove (not shown).
A commercial power source (AC100V) is used as a power source for operating the range hood 110.

The range hood 110 includes a ventilation fan 101, a motor 107 for driving the ventilation fan 101, a hood portion 103 which is an air suction port in the kitchen, and an exhaust duct 106.

Then, by energizing the motor 107 that drives the ventilation fan 101 and driving the ventilation fan 101, the air in the kitchen sucked from the hood portion 103 is sent to the outside (outdoor) of the kitchen via the exhaust passage. It is configured to be discharged.

In the ventilation device (range hood) according to this embodiment, an extension exhaust pipe (not shown) is connected to the exhaust duct 106 of the range hood 110, and the inside of the kitchen is sucked from the hood portion 103 of the range hood 110. The air is discharged from the exhaust duct 106 to the outside of the kitchen through the extension exhaust stack. Therefore, the exhaust duct 106 and the extension exhaust stack connected to the exhaust duct 106 constitute the exhaust passage in the present invention.

<Characteristic configuration>
Next, a characteristic configuration of the ventilation device (range hood) 110 according to the embodiment of the present invention will be described.

The ventilation device (range hood) 110 according to the embodiment of the present invention includes a headwind stop 111 in an exhaust duct 106 constituting an exhaust passage.

The headwind stop 111 is pivotally supported by a support shaft 112, and is configured to swing around the support shaft 112 (see FIGS. 2 and 3).
The back wind stop 111 substantially closes the exhaust duct (exhaust passage) 106 in the closed state (see FIG. 2), and regulates the flow of air from the exhaust duct (exhaust passage) 106 to the ventilation fan 101, that is, backflow. Fulfill function.

The headwind stopper 111 is made of a ferromagnetic material (for example, an aluminum-plated steel plate, SUS430, etc.).

Further, the ventilation device (range hood) 110 according to this embodiment includes an electromagnet 113 that generates a magnetic force when a direct current is applied (see FIGS. 2 and 3). The electromagnet 113 has a function of attracting the headwind stop 111 by the magnetic force generated by energization of a direct current to keep the backwind stop 111 in the closed state.
The contact portion of the electromagnet 113 that comes into contact with the backwind stopper 111 is provided with a protruding portion 114 having a sharp tip portion (hereinafter, also simply referred to as “tip portion”) 115 that abuts against the backwind stopper 111. ..

As described above, in this embodiment, the headwind stop 111 is made of a ferromagnet so that the backwind stop 111 can be maintained by being attracted by the magnetic force of the electromagnet 113. is there. However, in the headwind stop 111, a predetermined region attracted by the electromagnet 113 may be formed of a ferromagnet, and the other portion may not be formed of the ferromagnet.

Then, by stopping the energization of the electromagnet 113, releasing the magnetic force generated in the electromagnet 113, and driving the ventilation fan 101, the air flow and pressure increase in the exhaust duct 106 are generated, and these drive forces. As a result, the headwind stop 111 swings around the support shaft 112 and shifts to an open state (see FIG. 3) that allows air to flow.

Then, in the ventilation device (range hood) 110 according to this embodiment,
As described above, the electromagnet 113 includes a plurality of projecting portions 114 having a pointed tip portion (tip portion) 115 that comes into contact with the headwind stopper 111.
Further, the above-mentioned electromagnet 113 is provided with a protruding portion 114 projecting toward the headwind stop 111, and the tip of the protruding portion 114 facing the headwind stop 111 is an acute-angled tip. The tip 115 is formed.

Like the ventilation device (range hood) 110 according to this embodiment, by providing the tip portion 115 having an acute angle on the tip end side of the protrusion 114 provided in the electromagnet 113, between the headwind stopper 111 and the electromagnet 113. Even when small dust enters, or dirt such as an oil film adheres to the headwind stopper 111 or the contact portion of the electromagnet 113 with the backwind stopper 111, the electromagnet 113 has a headwind at the acute angle 115. It surely contacts the stopper 111.

The ventilation device (range hood) 110 of this embodiment is configured as described above, and is a combination of a headwind stop 111 formed of a ferromagnetic material and an electromagnet 113 having a tip 115 on the tip side of the protrusion 114. When the ventilation fan 101 is stopped and the backwind stop 111 is in the closed state, the attractive force of the electromagnet 113 ensures that the backwind stop 111 is kept closed and the pressure in the room is reduced. Even when the pressure is higher than the outdoor pressure, it is possible to prevent the indoor air from being discharged to the outside against the intention of the user.

Moreover, since the tip portion 115 having an acute angle is provided on the tip side of the protruding portion 114 of the electromagnet 113 that comes into contact with the headwind stopper 111, small dust may enter between the counterwind stopper 111 and the electromagnet 113. Even when dirt such as an oil film adheres to the back wind stopper 111 or the contact portion of the electromagnet 113 with the back wind stopper 111, the back wind stopper 111 is reliably secured via the acute angle portion 115 of the electromagnet 113. Can be adsorbed (maintains a closed state).

As a result, even when dirt such as dust or oil film adheres, the headwind stop 111 is attracted by the electromagnet 113, and the backwind stop 111 can be reliably maintained in the closed state. (Range hood) can be provided.

Further, in the ventilation device (range hood) of this embodiment, as described above, the electromagnet includes a plurality of protruding portions 114 having a tip portion 115, so that the back wind stopper 111 is more reliably attracted by the electromagnet 113. This makes it possible to provide a more reliable ventilation device (range hood).

The present invention is not limited to the range hood, and can be applied to devices other than the range hood, such as a bathroom heater / dryer having a ventilation function.

The present invention is not limited to the above embodiment in other respects as well, and various modifications can be made within the scope of the invention.

101 Exhaust fan 103 Hood part 106 Exhaust duct 107 Motor 110 Ventilation device (range hood)
111 Backwind stop 112 Support shaft 113 Electromagnet 114 Protruding part 115 Pointed tip of protruding part (tip)

Claims (2)

It is a ventilation device configured to exhaust the indoor air to the outside through the exhaust passage by driving the exhaust fan.
A backwind stop that regulates backflow, which is the flow of air from the exhaust passage to the ventilation fan, in a closed state where at least a predetermined region is formed of a ferromagnetic material.
An electromagnet that attracts the predetermined region formed from the ferromagnetic material of the headwind stopper by a magnetic force generated by energization of a direct current to maintain the counterwind stopper in the closed state is provided.
By stopping the energization of the direct current to the electromagnet and releasing the magnetic force generated in the electromagnet, the backflow stop is opened, and the air in the room passes through the exhaust passage by driving the ventilation fan. It is configured to allow it to flow and be discharged outdoors, as well as
The electromagnet is provided with a protruding portion that protrudes toward the headwind stopper, and the protruding portion has a sharp tip portion that comes into contact with the headwind stopper. The ventilation device according to claim 1, further comprising a plurality of the protruding portions.

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