JPH09145114A - Range hood fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an adjustment of positional displacement in respect to a gas discharging duct to be performed easily and positively performed without reducing a gas discharging efficiency or without applying any load to the gas discharging duct. SOLUTION: A coupler 4 and a main body A' of a range hood fan are connected to each other in a free fitting relation of a slide flange 24 in respect to a guide recess 7. The coupler 4 and the main body A' of the range hood fan are pushed with a slight force in an accurate manner in the case that the coupler 4 is slid to cause a cylindrical part 14 to be positionally aligned with the gas discharging duct B or in the case that the main body A' of the range hood fan is slid under a state in which the cylindrical part 14 of the coupler 4 is inserted into the gas discharging duct B. A positional displacement in respect to the gas discharging duct B is adjusted in a forward or a rearward and in a rightward or leftward direction within a range where the coupler 4 is struck against a hole edge opened at a wall surface of a lid member 6 or a fan casing 3.

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, and more particularly, to a joint connecting structure for adjusting a positional deviation with an exhaust duct by sliding.

[0002]

2. Description of the Related Art A range hood fan is attached to a wall surface of a cooking chamber by connecting it to an exhaust duct through a joint at an installation site. This exhaust duct piping work is usually carried out before the range hood fan installation work when building a house. The position of the duct is determined by the design drawing, but in reality, there is a displacement of several centimeters. As the duct, a steel plate spiral duct is generally used from the aspect of fire prevention such as flame spread, and when there is a displacement of several centimeters from the design drawing, strike the exhaust duct on site and adjust the position with the joint. However, it takes a lot of work and reduces durability. Japanese Utility Model Laid-Open No. 57-83340 has already been proposed to solve such a problem. In this prior art, as shown in FIG. 6, vertically elongated holes are provided at four positions of a flange 101 provided at one end of a joint 100.
102 is opened, a screw member 300 for inserting the vertically long hole 102 is screwed around the exhaust port 202 opened in the back plate 201 of the hood body 200, and the joint 100 is coaxially arranged side by side on the exhaust port 202. The fan casing 203 is attached to the back plate 201 with its discharge port 203a communicating with the exhaust port 202, and the head 301 of the screw member 300 is attached.
The structure is such that a spring member 400 is interposed between and the flange 101. In this prior art example, the spring force of the spring member 400 generates a frictional engagement force between the hood body 200 and the joint 100, and this frictional engagement force connects the hood body 200 and the joint 100 to connect the exhaust pipe 500 and the joint 100. Exhaust pipe when adjusting the positional deviation from 100
The joint 100 inserted into the 500 is configured so as not to follow the movement of the hood body 200 by the guide function of the vertically elongated hole 102.

[0003]

However, the spring member 400
However, it does require some skill to adjust the fastening force of the screw member 300 appropriately, and if it is not set appropriately at the time of shipment, it will take place through the joint 100 when adjusting the positional deviation with the exhaust pipe 500. A large load is applied to the exhaust pipe 500, which may deform the exhaust pipe 500. Moreover, when the fastening force of the screw member 300 is large, the screw member 300 is forced to be adjusted at the installation site, which makes the positional deviation adjustment with the exhaust pipe 500 troublesome. In addition, the hood body 20
The joint 100 is eccentric with respect to the exhaust port 202 opened in the back plate 201 of 0, and a part 101a of the flange 101 faces the exhaust port 202 in a crescent shape, which causes a reduction in exhaust efficiency.

The present invention has been made in view of the conventional circumstances, and its object is to adjust the positional deviation from the exhaust duct without lowering the exhaust efficiency or applying a load to the exhaust duct. Is to provide a range hood fan that can be easily and accurately performed.

[0005]

[Means for Solving the Problems] The technical means taken to achieve the above-mentioned object is, in claim 1, a hood body for capturing combustion exhaust gas and oil smoke accompanying cooking, and an exhaust gas provided in the hood body. In a range hood fan consisting of a fan casing having a joint with a duct and a fan arranged in the fan casing, the joint has a cylindrical portion connected to the exhaust duct and an annular slide flange at one end thereof. The fan casing has a circumferential structure, and a hole having a diameter larger than that of the cylindrical portion and smaller than that of the slide flange is formed in the wall surface of the fan casing, and a hole having substantially the same diameter as the hole is formed in the wall surface of the fan casing. And a guide recess for slidably guiding the slide flange is provided between the cover and the wall surface of the fan casing. The gist. A second aspect of the present invention is summarized in that the guide recess according to the first aspect has a narrowing portion that slidably holds the slide flange. A third aspect of the present invention is summarized in that one or both of the facing inner surfaces of the guide recess according to the first aspect is provided with a packing that slidably holds the slide flange.

According to the above technical means, the following effects are obtained. (Claim 1) The joint and the range hood fan main body (having a hood body, a fan, and a fan casing) are connected only by a loose fitting relationship of the slide flange with respect to the guide recess. Therefore, the joint and range hood fan main body when sliding the joint to align the cylindrical part with the exhaust duct or when sliding the range hood fan main body with the cylindrical part of the joint inserted in the exhaust duct The slide can be done accurately with a light force. The exhaust inlet of the cylindrical body always has a round hole shape and opens in the fan casing. (Claims 2 and 3) The joint and the range hood fan main body can be slid relative to each other accurately with a predetermined light force against the clamping force of the squeezing portion and the packing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show the first embodiment, FIG. 4 shows the second embodiment, and FIG. 5 shows the third embodiment. Symbol A is a range hood fan. First, the first embodiment will be described.

This range hood fan A is provided with a hood body 1, a fan 2, a fan casing 3 for housing the fan 2, and a joint 4 with an exhaust duct B.

The hood body 1 has a box shape having an open lower surface and a bell mouth 11 on the upper surface, and a grease filter (lath mesh, punching metal, slot) is provided upstream of the bell mouth 11 to cover the bell mouth 11. 21) is provided.

The fan casing 3 has a mounting flange 13 at its lower edge and a motor mounting bar (not shown) inside.
And has a box shape in which the mounting flange 13 is mounted on the upper surface of the fan casing 3.

The fan 2 is a turbo fan or a sirocco fan. A motor 12 is mounted on the mounting bar (not shown), and a turbo fan or a sirocco fan is mounted on the motor shaft 12a of the fan 2 and installed in the fan casing 3. There is.

The joint 4 has a structure including a cylindrical portion 14 connected to the exhaust duct B and a slide flange 24 provided at one end of the cylindrical portion 14.

The joint 4 is slidable with respect to the fan casing 3.

The means for making the joint 4 slidable is as follows: a hole 5 formed in the upper surface (wall surface) of the fan casing 3 with which the joint 4 is fitted, and a lid 6 having a hole 6a having substantially the same diameter as the hole 5. , A guide recess 7 for a slide flange provided between the upper surface of the fan casing 3 and the lid 6, and the like.

A hole 5 formed in the fan casing 3
Is larger than the cylindrical portion 14 of the joint 4 and smaller than the slide flange 24.

The lid 6 has an annular shape, and the screw 6 is fixed to the upper surface of the fan casing 3 with the core of the hole 6a aligned with the core of the hole 5.

The guide concave portion 7 is formed between the lid 6 and the lid 6 by recessing the hole 5 formed in the fan casing 3 around the hole 5 with a depth slightly larger than the thickness of the slide flange 24, and forming a guide. A slide flange 24 is slidably accommodated in the recess 7. This guide recess 7
Is not limited to the front-back and left-right directions until the cylindrical portion 14 of the joint 4 hits the edge of the hole 5 or the hole 6a. It is annularly recessed with no length range.

In the means for making the joint 4 slidable, the range in which the cylindrical portion 14 abuts against the hole edge of the hole 5 or the hole 6a is used as the sliding allowance of the joint 4.

Next, the procedure for connecting the exhaust duct B and the joint 4 to mount the range hood fan A on the mounting wall surface C will be briefly described. The range hood fan main body (hood body 1, fan 2) , Which has the fan casing 3), and the cylindrical portion 14 of the joint 4 provided at the upper end of A'is inserted into the exhaust duct B which has already been plumbed, and the hood body 1
The mounting bracket 10 fixed to the back plate 31 of FIG. When the piping position of the exhaust duct B is not according to the design drawing and the position is displaced by several centimeters, the joint 4 is slid with respect to the fan casing main body A ′ by using the slide allowance and the duct B is moved.
Then, the cylindrical portion 14 is inserted into the duct B, and the range hood fan main body A ′ is attached to the attachment wall surface C. Further, when the exhaust duct B is displaced toward the indoor side from the normal position, the cylindrical portion 14 is moved to the duct B.
The range hood fan main body A ′ may be slid to the mounting wall surface C side without moving the joint 4 connected to the exhaust duct B using the slide allowance. At this time, the range hood fan main body A ′ is slid without generating any additional driving force (pulling force) on the joint 4, so that no load is applied to the exhaust duct B. Further, the leakage of smoke into the room is prevented by the large flow resistance due to the meandering labyrinth X formed by the small gap formed by the slide flange 24 and the guide recess 7, and the exhaust inlet of the cylindrical portion 14 of the joint 4 is prevented. 14a always faces the fan 2 in the fan casing 3 and opens in a round hole shape.

Next, the second embodiment will be described. In this embodiment, the slide flange 24 is not slidably fitted in the guide recess 7 as in the first embodiment, but the guide recess is used. The slide flange 24 is slidably held by the narrowed portion 37 formed by bending at the entrance portion of 7. As shown in the drawing, this narrowing portion 37 is a hole in the cover plate 6.
The edge 6a and / or the edge 5 of the hole of the fan casing 3 are bent or formed.

The narrowing portion 37 may be constructed so that the entire guide recess 7 is narrowed and the slide flange 24 is slidably fitted therein.

In the third embodiment, the guide recess 7 is used.
In addition, a packing 9 for slidably sandwiching the slide flange 24 is circumferentially provided on either or both of the facing inner surfaces 27.

As described above, the packing 9 has the cylindrical portion 14 with the hole 5
Alternatively, even if the joint 4 is slid until it abuts against the edge of the hole 6a, it is provided around the entrance of the guide recess 7 so that the gripping of the slide flange 24 is continued.

The advantages of both the second and third embodiments described above are the same as those of the first embodiment.
This means that the connecting portion between the fan casing body A ′ and the fan casing body A ′ becomes more airtight.

In the present embodiment, the case where the exhaust duct B is connected to the upper surface of the fan casing 3 as shown in the drawings is described in detail. However, in the present invention, the exhaust duct B is connected to the fan casing 3. It also includes the case of being connected to the side surface.

As described above, according to the present invention, since the joint and the range hood fan main body (having the hood body, the fan and the fan casing) are connected by loosely fitting the slide flange into the guide recess, the joint is Sliding relative to the range hood fan body can be done with a light force that considers only the weight of the joint or the range hood fan body, and the fastening force depends on the skill of the installer, such as screwing through the spring member. Large and small relationships do not occur, which creates large sliding resistance. Therefore, there is no need to perform the troublesome work of tightening each screw member so as to have an appropriate fastening force, and this is not done properly, and a large load is applied to the exhaust duct via the joint when the range hood fan body slides. Therefore, there is no fear that the exhaust duct will be deformed due to this, and the positional deviation with the exhaust duct can be adjusted accurately and easily. Further, the guide recess and the slide flange form a meandering labyrinth consisting of a small gap, which creates a large flow resistance, so that the exhaust can automatically have airtightness that does not leak into the room. It will be possible. Therefore, when the joint and the range hood fan main body are relatively slidable while maintaining the airtight state, the structure can be simplified and the cost can be realized. Further, since the exhaust port of the cylindrical body of the joint is always exposed to the fan and opened in the fan casing, the exhaust efficiency does not decrease. Furthermore, in the case where the slide flange is slidably held by the narrowing part or when the slide flange is held by packing, not only the airtightness is further increased, but also the relative sliding between the joint and the range hood fan body It can be performed with a very light force as compared with a combination of a screw member and a spring member, the positional deviation adjustment work with the exhaust duct is simple and accurate, and the exhaust duct is not deformed. Moreover, since the narrowing part and packing also serve as a means for preventing looseness of the joint, insertion of the joint into the exhaust duct can be performed without tilting the range hood fan main body or joint, simplifying installation work. Can contribute.
In addition, in the case of packing, the elasticity of the packing gives flexibility to the direction of the joint, so even if the connecting end of the exhaust duct is slightly inclined with respect to the joint, tilt the joint accordingly. Can be connected.

[Brief description of the drawings]

FIG. 1 is a front view showing a mounted state of a range hood fan according to a first embodiment with a part cut away.

FIG. 2 is an enlarged sectional view taken along line (2)-(2) of FIG.

FIG. 3 is a partially enlarged cross-sectional view showing a state in which a joint is slid.

FIG. 4 is a partial enlarged cross-sectional view showing the gist of the second embodiment.

FIG. 5 is a partially enlarged cross-sectional view showing the gist of a third embodiment.

FIG. 6 is an enlarged cross-sectional view showing a connecting portion between a conventional joint and an exhaust pipe (exhaust duct).

[Explanation of symbols]

1: Hood body B: Exhaust duct 2: Fan 4: Joint 3: Fan casing 14: Cylindrical part 24: Slide flange 5: Hole (hole on the wall of the fan casing) 6: Lid 6a: Hole (of lid) Hole) 7: guide recess 9: packing A: range hood fan A ': range hood fan main body 37: narrowing part

Claims (3)

[Claims] 1. A hood body for capturing combustion exhaust gas and oily smoke accompanying cooking, a fan casing provided in the hood body for connecting with an exhaust duct, and a fan arranged in the fan casing. In the range hood fan consisting of, the joint has a structure in which a cylindrical portion connected to the exhaust duct and an annular slide flange are provided around one end of the joint, and the joint has a larger diameter than the cylindrical portion and slides on the wall surface of the fan casing. A hole having a diameter smaller than that of the flange is opened, and a lid body having a hole having substantially the same diameter as that of the hole is provided on the wall surface of the fan casing with the hole cores aligned with each other. A range hood fan, characterized in that a guide recess for slidably guiding the slide flange is provided therebetween. 2. The range hood fan according to claim 1, wherein the guide recess has a narrowing portion that slidably holds the slide flange. 3. A packing which slidably holds a slide flange is provided around one or both of the inner surfaces of the guide recess facing each other.
The described range hood fan.