JPH0445001Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of a damper device that works in conjunction with a range hood or the like.

[Prior art and its problems]

As a damper device that works in conjunction with a conventional range hood or the like, those shown in FIGS. 4 to 6 are common.

This damper device 5 has an opening 2a in a wall surface 2 to which the range hood 1 is attached, which communicates between indoor and outdoor areas.
opening 2 and arranging the fan 3, and opening 2 above.
An exhaust duct 4 is fixed to the outdoor side of the wall surface 2 on which the exhaust duct 4 is disposed, and a damper body 6 is provided in the exhaust duct 4, the outer diameter of which is smaller than the inside diameter of the exhaust duct.
is arranged to be openable and closable by the wind pressure of the fan 3, with the shaft 5a as the center of rotation.
Note that the reference numeral 7 in the figure is a stopper.

However, in the conventional damper device 5, the damper body 6 must be configured to be opened and closed by the wind pressure of the fan 3, and therefore is made of a thin aluminum plate, etc. Therefore, unnecessary opening/closing operations of the damper body 6 occur, which tends to generate noise, and outside noise easily enters the room, and cold air from outside enters the room through the gap between the exhaust duct 4 and the damper body 6. The problem was that it could easily flow into the environment.

This invention was devised in view of the current situation, and its purpose is to ensure that the damper body can open and close the exhaust flow path in conjunction with a range hood, etc. It is an object of the present invention to provide a damper device for a range hood, etc., which does not generate any noise due to noise, can prevent outside noise from entering the room, and has good airtightness.

(Means for Solving the Problems) In order to achieve the above object, in this invention, a damper device in a range hood etc. is connected to an exhaust duct installed in communication with an exhaust device of the range hood etc. Consisting of a damper body disposed within the exhaust duct, and a contraction body made of a shape memory alloy disposed on the outdoor side of the damper body,
The damper body is configured to be rotatable with two damper pieces, and each of the damper pieces is urged in the damper flow path closing direction by a spring or the like, and
Each end of the shrinkable body is deviated and fixed to a position where the damper pieces do not face each other when the damper pieces are folded due to the heat contraction action of the shrinkable body. be.

[Effect]

Therefore, in the damper device for a range hood, etc. according to this invention, in order to ensure that the exhaust flow path is opened and closed by the damper body and to prevent noise from outside from entering the room, the damper device is closed using the biasing force of the spring. When the damper body, which is biased in the direction, is folded open by the contraction action of the contraction body to close the exhaust flow path, the damper body is brought into the flow passage closed state by stopping the contraction action of the contraction body. It is characterized by being configured to move back to .

〔Example〕

This invention will be described in detail below based on an embodiment shown in the accompanying drawings.

As shown in FIGS. 1 and 2, the damper device 10 according to this embodiment includes an exhaust duct 11 attached to a wall 2, between walls, or at the back of an exhaust device, and an exhaust duct 11 disposed within the exhaust duct 11. The damper body 12 includes a damper body 12, and a contracting body 13 disposed on the back side of the damper body 12.

The exhaust duct 11 has a mounting panel 14 formed on its base end side, and this mounting panel 1
4 is attached and fixed with screws or the like to the outdoor side of an opening 2a formed in the wall surface 2 or the like.

The damper body 12 is composed of two semicircular damper pieces 12a, 12b, and both ends of each damper piece 12a, 12b are connected to each other via a shaft 15 supported by the exhaust duct 11. Rotatably connected.

Further, each of the damper pieces 12a, 12b is normally urged in the damper flow path closing direction (in the direction of arrow a in FIG. 2) by the urging force of a spring 16 interposed in the shaft 15. As a result, the outer peripheral edge of each damper piece 12a, 12b is configured to be pressed against the inner peripheral edge 14b of the mounting panel 14 in a normal state.

It goes without saying that the biasing force of the spring 16 is smaller than the contractile force of the contractile body 13, which will be described later.

The contractile body 13 is formed into a coil spring shape using a shape memory alloy made of nickel titanium alloy, and when heated to a set temperature (in the range of approximately 40°C to 100°C), a contractile force that overcomes the biasing force of the spring 16 is generated. occurs, and acts to fold the damper pieces 12a, 12b into a so-called two-fold shape, as shown in FIG.

Both ends of the contraction body 13 constructed in this way are fixed to brackets 17a, 17b arranged on the outdoor side of each of the damper pieces 12a, 12b.

As is clear from FIG. 2, the brackets 17a and 17b are arranged at offset positions.

That is, the bracket 17a is arranged at a position apart from the shaft 15, and the bracket 17b
are disposed close to the shaft 15, and are fixed in positions where they do not face each other when the damper pieces 12a, 12b are folded due to the heat contraction action of the shrinkable body 13.

By shifting the placement positions of the brackets 17a and 17b in this way, the damper piece 12
The folding angles of a and 12b can be made acute, and the flow resistance of exhaust gas can be reduced.

FIG. 3 is a circuit diagram of the damper device 10 configured as described above, and shows a range hood fan switch SW1 (off/low/strong switching system).
The heating switch SW2 of the contracting body 13 is an interlocking type, and when the fan switch SW1 is set to the on state, the heating switch SW2 is also turned on in synchronization, and the contracting body 13 is heated. There is. Further, instead of directly heating the contracting body 13, a heater may be provided in the vicinity of the contracting body 13 to indirectly heat it. Note that the symbol h in FIG. 3 is a temperature fuse h. This fuse h is connected to the shrinkable body 1 when the outdoor temperature of the damper body 12 exceeds 100°C.
This prevents heating to 3.

That is, this fuse h prevents a large current from flowing through the contracting body 13 and causing it to become high temperature (100 degrees Celsius or more).
This prevents the occurrence of fires and the like caused by heat generation of the contraction body 13.

Incidentally, when the damper device 10 is used, the contracting body 13 is made of damper pieces 12a, 1 which are folded in half.
2b, the contracting body 13 will not be exposed to hot air from indoors and will not malfunction.

The damper device 10 configured as described above is
When hot air etc. from indoors is to be discharged outdoors by the fan of the range hood, the contraction body 13 is heated in conjunction with the fan switch SW1, and the duct flow path is opened.

The heating shrinkage force of this shrinkable body 13 is applied to the damper body 1
In order to overcome the biasing force of the spring 16 that biases the damper body 12 into a flat state, the damper body 12 is folded in half, as shown by the broken line in FIG. , the opening 14a of the mounting panel 14 is left wide open.

Therefore, hot air from indoors is discharged outdoors through the opening 14a.

In addition, when heating the shrinkable body 13, it is also possible to apply heat in advance and to heat it to a predetermined temperature when the main switch SW1 is turned on.

Further, since the damper body 12 is folded in half, the lateral length (protrusion amount to the outdoor side) of the exhaust duct 11 in which the damper body 12 is disposed can be reduced.

Next, the rotation of the fan is stopped, and the contracting body 13
When heating to is stopped, the contracted body 13 is cooled,
The damper pieces 12a, 12b are rotated back to the state shown by the solid line in FIG. 2 (damper channel closed state). As a result, the opening 14a of the mounting panel 14 is closed by the damper body 12, thereby preventing cold air, hot air, or noise from entering the room from outside.

Further, the damper pieces 12a, 12b are normally urged in the closing direction by the urging force of the spring 16, and the outer peripheral edge of each damper piece 12a, 12b is pressed against the inner peripheral edge 14b of the mounting panel 14. Therefore, even if the inside of the exhaust duct 11 becomes negative pressure due to strong winds, for example, there is no risk that the damper body 12 will open or close unnecessarily and generate noise.

In addition, in the above embodiment, the damper piece 12
Although the explanation has been given by taking as an example the case where the shaft 15 that rotatably connects the shafts 1 and 12b is arranged horizontally, the present invention is not limited to this.
5 can also be arranged vertically.

(Effect of the invention) As explained above, the damper device for a range hood, etc. according to this invention uses the contraction action of the contraction body to move the damper body, which is biased in the closing direction by the biasing force of the spring, during exhaust operation. When the exhaust flow path is closed by folding it open, the damper body is configured to move back to the flow path closed state by stopping the contraction action of the contraction body. The oven can be opened and closed reliably in conjunction with the range hood, and there is no noise caused by headwinds, etc., and it prevents outside noise from entering the room. Also, it is possible to provide a good damper device for a range hood or the like.

[Brief explanation of the drawing]

Fig. 1 is a rear view showing a damper device in a range hood or the like according to an embodiment of this invention, Fig. 2 is a vertical sectional view taken along the line of Fig. 1, Fig. 3 is an electric circuit diagram of the damper device, 5 is a front view showing the conventional damper device, and FIG. 6 is a longitudinal sectional view taken along the line shown in FIG. 5. Explanation of symbols, 2...Wall surface, 10...Damper device, 11...Exhaust duct, 13...Contractor, 14
...Mounting panel, 14a...Opening, 15...
Shaft, 16...spring, 17a, 17b...bracket.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An exhaust duct installed in communication with an exhaust device such as a range hood, a damper body disposed within this exhaust duct, and a damper body disposed on the outdoor side of this damper body. a contracted body made of a shaped memory alloy;
The damper body is configured to be rotatable by two damper pieces, and each of the damper pieces is urged by a spring or the like in the direction of closing the damper flow path, and the damper body is configured to be rotatable by two damper pieces. A range hood characterized in that each end of the body is deviated and fixed to a position where the damper pieces do not face each other when the damper pieces are folded due to the heat contraction action of the shrinkable body. Damper device in etc. (2) The damper device for a range hood or the like according to claim 1, wherein the contracting body is formed to exhibit a contracting action within a range of about 40°C to 100°C.