JPS5947815B2 - ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a ventilation fan suitable for use in a kitchen.

[Background of the invention]

As this type of ventilation fan, one in which a joint case is provided on the main body cabinet of the ventilation fan and a duct is connected to the joint case has been developed.

With this configuration, it is difficult to connect the joint case and the duct.

[Purpose of the invention]

An object of the present invention is to provide a ventilation fan that allows easy connection of a joint case and a duct.

[Summary of the invention]

The gist of the present invention is that, in a ventilation fan that guides air discharged by an impeller installed in a main body cabinet to the outdoors through a duct, a joint case having a road cross-sectional area larger than that of the duct is provided; The present invention is configured so that the air discharged by the impeller is guided to the duct side through the joint case, and the front side of the joint case is made openable.

[Embodiment of the Invention] An embodiment in which the present invention is applied to a range hood will be described below based on the drawings.

Reference numeral 1 denotes a main body cabinet, which is composed of two opposing side plates 2, a top plate 3, and a rear plate 4.

The rear part of this book cabinet 1 is partitioned by a partition plate 5, and the partition plate 5, the rear plate 4, and the top plate 3 constitute a fan chamber 6.

The upper plate 3 and the rear plate 4 are formed integrally by bending steel plates.

Reference numeral 7 denotes a motor fixed to the rear plate 4 with a mounting leg 8, and a turbo-type impeller 9 is fixed to its rotating shaft.

10 is a fan suction port formed in the partition plate 5.

Reference numeral 11 denotes a support fitting 12 provided on the partition plate 5 with a grease filter.
It is removably attached to the horizontal partition plate 13 by means of an elastic support fitting 14 made of a plate spring or the like so that the upper part thereof is tilted toward the front.

The grease filter 11 can be easily removed by hooking a finger onto the handle 15 provided at the lower end of the grease filter 11, pulling up the grease filter 11 in the direction of the arrow, and rotating it as shown by the two-dot chain line.

A front cover 16 is rotatably attached to the front end of the upper plate 3 by a hinge 17, and an operation box 18 is provided at the lower end of the front cover 16, and an auxiliary intake hole 19 is provided at the upper part.

Reference numeral 20 denotes a plurality of switches arranged in the operation box 18, which change the rotation speed of the motor 7 between high, medium, and low speeds.

When the front cover 16 is attached, the front cover 16 is placed in contact with the backing 21 provided at the front end of the horizontal partition plate 13 as shown in the figure.
The main intake section 22 is configured at the bottom of the main body, and the auxiliary intake chamber 23 is configured at the top.

This backing 21 includes a main intake chamber 22 and an auxiliary intake chamber 23.
This is to maintain airtightness between the two.

Reference numeral 24 denotes a vent hole opened at the rear of the elastic support fitting 14 of the horizontal partition plate 13.

25 is located at the rear inside the auxiliary intake chamber 23 and is connected to the horizontal partition plate 1.
It is an electrical component such as a transformer installed on 3.

The transformer 25 is a gas cock (not shown) connected to the gas staple when the range hood is turned on.
It is set up to open up.

26 are holes for duct tangent lines provided in each side plate 2; 27
is the duct hole attached to the upper plate 3, and the exhaust duct (
(not shown).

Reference numeral 28 denotes a recess provided over the entire width at the upper end of the rear plate 4, and a metal fitting 29 is provided over the entire width for mounting the main body that fits within this recess 28 or projects slightly. .

This mounting bracket 29 is used to attach the range hood to the wall W by engaging with a bracket 30 fixed to the wall W to which the range hood is attached.

D indicates the depth of the depression 28.

This recessed portion 28 is formed by integrally bending the rear plate 4 formed of a steel plate, and is used to increase the strength of the main body and to allow the range hood to be mounted as close to the wall surface W as possible. It is something.

The lower part of the partition plate 5 has a sloped part 31 that slopes downward as it approaches the rear plate 4, and oil droplets dripping from the grease filter 11 are transmitted from this sloped part 31 surface to the inner surface of the rear plate 4.
Finally, the oil is collected in the oil receiving groove 33 formed by the bent portion 32 of the rear plate 4.

Further, this inclined portion 31 greatly contributes to improving the performance of the fan device composed of the turbo impeller 9.

That is, the air discharged to the outer periphery by the root wheel 9 disposed close to the suction port 10 is smoothly guided and exhausted to the rear of the fan chamber 6 by this inclined portion 31, so that the air is directly below the impeller 9. This improves the performance of the fan device.

34 is a cord holding groove formed by bending the outer periphery of the front cover 16, into which the cord 35 connecting the transformer 25 and the switch 20 is inserted and held.

The cord 35 is particularly connected from the upper retaining groove 36 to the side retaining groove 3.
7 to prevent the cord 35 from crossing the auxiliary intake hole 19 through which oil smoke passes, and to prevent the cord 35 from wobbling.

38 is a felt pasted around the entire circumference of this holding groove 34, 39 is a cord pulled out from the transformer 25 and connected to an external power source, 40 is a front panel of the operation box 18, and 41 is a front cover. Reference numeral 16 indicates a support rod, and reference numeral 42 indicates a cord holding fitting inserted into the cord holding groove 34.

Now, if you operate the switch 20 and operate the motor 7,
Oil smoke etc. coming out of the gas range rises and reaches the vicinity of the main intake chamber 22 of the range hood.

The air containing oil smoke that has reached the vicinity of the main intake chamber 22 is transferred to the impeller 9
The oil smoke is sucked through the grease filter 11, the oil smoke is collected by the grease filter 11, and the clean air is accelerated by the impeller 9 and exhausted from, for example, a duct attached to the duct hole 27.

On the other hand, the air containing dilute oil smoke that has separated from the air passage sucked into the intake chamber 22 rises to the ceiling, and the air stagnant on the ceiling is sucked in through the auxiliary intake holes 19, and the horizontal partition plate 1
The air passes through the ventilation hole 24 opened at 3, reaches the fan chamber 6, and is similarly exhausted to the outside by the impeller 9.

The oil smoke sucked in from the auxiliary intake hole 19 is very thin, and there is no problem even if it is directly exhausted without passing through the grease filter 11.

FIG. 2 shows a general example of attaching an exhaust duct 51 to the range hood book (2tF) shown in FIG. 1, and in this figure, 52 is a T-shaped joint pipe.

Generally, the exhaust duct 51 is constructed and fixed in advance to the house by a construction company, and when the range hood F is attached to the wall surface W of the house, a certain misalignment always occurs.

Therefore, when the joint pipe 52 having the same diameter as the exhaust duct 51 is used as shown in FIG.
It becomes impossible to join.

Therefore, as shown in Fig. 3, it absorbs misalignment and maintains sufficient airtightness between the range hood F and the existing exhaust duct 51
It is conceivable to use a joint case 53 to connect the two.

FIG. 4 shows a characteristic part of the present invention, and shows the relationship between a range hood F and a joint case 53 that is attached to the range hood F with screws or the like.

In this figure, reference numeral 55 indicates an exhaust hole formed on the upper surface of the range hood F, 56 indicates an intake hole formed on the lower surface of the joint case 53, and 57 indicates an exhaust hole formed on both sides of the joint case 53.

The exhaust hole 55 and the intake hole 56 have the same size, and have a larger area than the exhaust hole 57.

In this way, the air discharged from the range hood F passes through the dog intake hole 56 and enters the joint case 53, and then is led to the exhaust duct 51 through the small diameter exhaust hole 57, so that the passage of the discharge air is gradually expanded. It is narrowed and the exhaust efficiency increases.

According to experiments, the passage area of the intake hole 56 is 1.
When increasing the displacement by 5 to 2 times, the displacement increased by about 50 times.

This is thought to have the same effect as that of a tapered hood when air is taken in by gradually pinching the exhaust passage.

However, this tapered hood is of a type that collects and sucks smoke, etc., and is different from the type of hood that is pushed in with an impeller 9 as in the present invention.

In particular, in a type of range hood that pushes in smoke like the present invention, if the fan chamber 6 configured in the cabinet body 1 has an exhaust port with a very small opening area, the impeller 9 will move the smoke-containing air out. is simply squeezed around the exhaust port, resulting in extremely poor exhaust efficiency.

In this regard, if the joint case 53 having a passage cross-sectional area smaller than the diameter of the exhaust duct 51 is attached to the upper part of the fan chamber 6 as in the present invention, the air pushed into the upper part of the fan chamber 6 can be smoothly transferred to the joint case. 53 and the air that has flowed into the joint case 53 is further guided to the exhaust duct 51, so that the exhaust efficiency is greatly improved.

FIG. 5 shows an exhaust hole 5 of dφ provided in the joint case 53.
When attaching the exhaust duct 51 of the same diameter dφ to the flange 5
A configuration for absorbing misalignment using a middle joint 59 having a diameter of 8 is explained.

As is clear from this figure, the exhaust hole 57 and the exhaust duct 51
When it is assumed that deviates by the maximum eφ, the diameter D of the tsuba 58
φ needs to be (d+2e)φ as shown in FIG.

If the flange 58 has such a size, the flange 58 of the intermediate joint 59 will hit the outer periphery of the exhaust hole 57 and the exhaust duct 51 and the exhaust hole 5 will be securely connected even if the displacement is within eφ.
7 can be connected.

However, if the flange 58 is made to protrude with the same diameter around the entire circumference, the diameter of the flange 58 will become large, making it impossible to maintain a sufficient distance between the range hood F and the ceiling.

FIG. 7 shows a state in which the intermediate joint 59 inserted into the exhaust duct 51 is pulled out and the collar 58 is brought into contact with the exhaust hole 57 of the joint case 53, that is, the intermediate joint 59 is adjusted in the axial direction by L.

FIG. 8 shows the middle joint hand 61, and the middle joint hand 61 is provided with an eccentric collar 62.

63 is a handle provided at the end of the middle joint 61 on the brim side.

FIG. 9 shows the size of the tsuba 62 shown in FIG. 8. According to this figure, the maximum diameter of the tsuba 62 is d + e.
, which is smaller than the collar 58 shown in FIG.

Also, since the tsuba 62 is only partially enlarged (in the embodiment,
It is also possible to save on material costs (approximately 1/3 of the total circumference).

FIG. 11 shows a middle joint 61 in the exhaust hole 57 of the joint case 53.
5 is a view of the attached state seen from the inside of the joint case 53. FIG.

As is clear from this figure, the opening on the front side of the joint case 53, that is, the front cover mounting opening 64 and the exhaust hole 5T.
Put your hand in and hold the handle 63 of the middle joint 61 with the middle joint 5.
Pull it out to the 3rd side.

Then, the collar 62 is rotated in the direction opposite to the displacement of the exhaust duct 51, and the fixing metal fitting 65 is passed over the peripheral edge 66 of the exhaust hole 57 and fixed to the handle 63 with a screw 67.

Thereby, the intermediate joint 61 is fixed to the joint case 53.

Thereafter, the lid attachment opening portion 64 is closed with a lid (not shown).

FIG. 12 is a cross-sectional view of the middle joint hand, and FIG. 13 is a cross-sectional view of the middle joint hand 61 attached to the joint case.

In the figure, 68 is an elastic ring provided in the outer circumferential groove 69 of the intermediate joint 61, and the asbestos tube 70, which does not have much elasticity on its outer circumference, is designed to maintain fire resistance and airtightness.

This figure shows that the intermediate joint 61 is inserted into the exhaust duct 51, pulled out to the side of the joint case 53 by a certain amount, and fixed.

In this figure, 71 is a fireproof backing, and 72 is an intermediate cylinder.

According to this figure, the asbestos tube 70, which does not have elasticity, can be directly attached to the intermediate tube 72 or the exhaust duct 51 due to its elasticity @68, and even if there is some fitting error, airtightness can be maintained. can.

〔Effect of the invention〕

According to the present invention, since the front side of the joint case with a large road cross-sectional area can be opened, it is possible to easily connect the joint case and the duct by inserting a hand into the joint case from the front side of the joint case. The ventilation fan can be replaced.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a wooden range hood, Figure 2 is a general duct connection diagram, Figure 3 is a duct connection diagram showing an embodiment of the present invention, and Figure 4 is a range hood. Fig. 5 is a developed view showing a general connection configuration, Fig. 6 is a side view, Fig. 7 is a front view, Fig. 8 is a front view of the middle joint, Fig. 9A , Figure 9B is a schematic front view and side view of the same, Figure 10 is a side view shown together with the range hood,
FIG. 11 is an inner view of the joint case showing the state in which the intermediate joint is attached to the joint case, FIG. 12 is a sectional view of the intermediate joint,
FIG. 13 is a sectional view of the intermediate joint attached to the joint case. 1... Main cabinet, 51... Exhaust duct, 53... Joint case, 61...
... Middle joint hand, 57 ... Exhaust hole, 64 ...
・・Front cover mounting opening part.

Claims (1)

[Claims] 1. In a ventilation fan that guides air discharged by an impeller installed in this cabinet to the outdoors via a duct, a joint case having a road cross-sectional area larger than that of the duct is provided on the main cabinet, and the joint case is connected to the main cabinet. A ventilation fan characterized in that the air discharged by the impeller is guided to the duct side through the duct, and the front side of the joint case is openable.