JP4979015B2 - Air conditioner fan room structure. - Google Patents

Description

  The present invention belongs to the technical field of a fan chamber structure of an air conditioner, in particular, a vibration isolation structure of a fan chamber and an airtight structure.

Conventionally, a fan motor unit is installed in a fan chamber of an air conditioner. In order not to transmit the vibration of the fan motor to the frame of the fan chamber, as shown in Patent Document 1, the upper frame on which the fan motor is mounted has a vibration isolator (vibration isolation) having a vibration absorber such as a spring or rubber. Mechanism).
For example, in a conventional air conditioner, as shown in FIG. 7, air (Air.B) conditioned in a fan chamber a is moved by a fan motor unit b placed on a vibration isolation frame i on a vibration absorber i1. Air is supplied into the room from the fan chamber discharge port c through a duct, and an air conditioning chamber f in which an upstream coil is disposed between the suction opening d of the fan chamber a and the outer edge e of the fan suction port such as a bell mouth. In order to maintain hermeticity and the like, the canvas g is sealed with an airtight and flexible canvas. However, when the fan b1 of the fan motor unit b is operated, air (Air.C) is supplied, the inside of the fan chamber a is positive, and the air conditioning chamber f of the upstream heat exchange (coil) is in the air (Air .A) is a negative pressure because it is sucked, the thrust force in the direction of the arrow in FIG. 7 operates, the bell mouth opening e contacts the fan chamber partition plate a1 of the fan chamber a, and vibration is generated. It will propagate to the frame of the fan chamber a.
Therefore, in the conventional fan chamber a, a thrust prevention spring h is interposed between the suction opening of the fan chamber and the outer edge of the fan suction port such as a bell mouth so as to press outward (arrow in FIG. 7). Yes.
Japanese Patent Publication No. 6-89811

By the way, in the conventional fan chamber structure shown in FIG. 7, the work of closing the space between the suction opening d of the fan chamber a and the outer edge e of the bell mouth with a flexible canvas g is time consuming. The prevention springs h are provided in several places to increase the repulsive force and balance, but there is a problem that this mounting work is also troublesome.
That is, in order to attach the canvas g, a member such as a bolt or a flat bar is required, and since it is an installation work in a narrow place, the work efficiency is poor, and the thrust prevention spring h is also used for attaching a spring such as a bolt or a bracket. In order to counteract the large thrust force of the entire fan, it is necessary to support at several places (2 or 4 points), and the spring h itself is a strong elastic body with a large spring constant. There was a problem that it was necessary.
The present invention has been made in view of the above problems, and maintains the airtightness of the suction opening of the fan chamber and the outer edge of the fan suction port such as a bell mouth with a simple structure and repels the thrust force. Thus, an object of the present invention is to provide a fan chamber structure of an air conditioner that is easy to mount and maintain.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to an air conditioner in which a fan motor unit of a fan chamber is mounted on a vibration isolation frame, and between the suction opening of the fan chamber and the outer edge of the fan suction port. An airtight elastic layer is provided so as to maintain airtightness, and the compression hardness of the elastic layer has a thickness that can suppress the thrust movement during operation of the fan, and has a thickness that absorbs vibration, and when the fan is stopped The restoring thickness of the elastic layer is restored to a thickness equal to or greater than the distance between the outer edge of the fan suction port and the suction opening of the fan chamber.
According to a second aspect of the present invention, in the fan chamber structure of the air conditioner according to the first aspect, the elastic layer is adhered and fixed to at least one of the suction opening of the fan chamber and the outer edge of the fan suction port. It is characterized by.

As described above, according to the first aspect of the present invention, the compression hardness is a hardness that can suppress thrust movement during operation of the fan, and has a predetermined thickness, and the elastic layer has a predetermined thickness when the fan is stopped. Since the elastic layer that restores the restored thickness to a thickness greater than the distance between the outer edge of the fan suction port and the suction opening of the fan chamber is provided, there is no need for a member such as a canvas or a thrust prevention spring as in the past. And easy to install.
Further, since the elastic layer is provided on the entire circumference of the suction opening, the thrust load is distributed over the entire surface of the elastic layer, so that the amount of movement of the fan motor unit can be sufficiently suppressed unlike the conventional use of a spring.
According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the elastic layer is simply bonded and fixed to either the suction opening of the fan chamber or the outer edge of the fan suction opening, Assembling and disassembly of the motor unit into the fan chamber is facilitated.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a fan chamber structure of an air conditioner will be described with reference to the drawings.
In FIG. 1, the overall structure of the fan chamber of the air conditioner of the present embodiment is schematically shown in FIG. 1. As shown in FIG. 1, the fan chamber 1 is provided with a suction opening 13 and a fan chamber discharge port 12 in a frame 11. An air conditioning room F in which a coil or the like is arranged is connected upstream of the chamber 1, and a duct or the like connected from the fan chamber discharge port 12 to the air conditioning room is connected downstream.
In the fan chamber 1, four vibration absorbers 21 that are vibration isolation frames 2 and a vibration isolation frame 22 are provided thereon. The fan motor unit 3 is installed on the vibration isolation frame 22, and the fan motor unit 3. Are provided with a fan 31, a motor 32 for driving the fan 31, and a bell mouth 33 serving as a fan suction port fixed to the end 221 of the vibration isolator 22.
Between the inner wall 131 of the suction opening 13 provided in the fan chamber partition plate 14 arranged on the air conditioning chamber F side upstream of the fan chamber 1 and the outer edge 341 of the outer frame 34 of the bell mouth 33 (see FIG. 2). Is provided so as to cover all the gaps so that both chambers are hermetically sealed by the elastic layer 4. The elastic layer 4 is one of the features of the present invention. In this embodiment, the elastic layer 4 is fixed to the outer frame outer edge 341 of the bell mouth 33 as a fan suction port by an adhesive layer 41.
The elastic layer 4 in this embodiment has a quadrangular shape, which will be described with reference to FIGS. 2 and 3. As shown in FIG. 3, the outer edge 341 of the bell mouth 33 is also rectangular. Correspondingly, the suction opening 13 of the fan chamber partition plate 14 is a square opening, and the opening shape of the elastic layer 4 is also a square shape in accordance with the opening shape of the opening 13. As a foundation, it is 10mm thick and has a width of several centimeters. Of course, the thickness and width may be appropriately changed according to the capacity and size of the fan chamber 1.

The frame-shaped elastic layer 4 is bonded to the adhesive layer 41 of the fan chamber partition plate 14 and, when assembled, the fan motor unit 3 can be installed at a predetermined location in the fan chamber 1 as shown in FIG. The elastic layer 4 does not need to be bonded to the outer edge 341 of the outer frame on the bell mouth 33 side.
By the way, the fan motor unit 3 of the fan chamber 1 is mounted on the vibration isolation frame 2, and the vibration isolation frame 2 can be moved left and right (arrow C in FIG. 4) from the structure of the vibration absorber 21 using rubber, a spring or the like. However, as shown in FIG. 4 (enlarged view of the Y portion in FIG. 1), when the fan 31 of the fan motor unit 3 is operated, air is supplied to the fan chamber 1 to be positive pressure and air conditioning upstream. Since the chamber F has negative pressure because air is sucked in, the thrust force in the direction of arrow A (FIG. 4) is activated on the entire fan motor unit 3, and the fan motor unit 3 also moves to the right of the dotted line in the figure. The elastic layer 4 also changes from a state of B1 having a thickness of X2 to a compressed state of A1 having a thickness of X1.

The hermetic elastic layer 4 used in this example is an ethylene / propylene (EPDM) semi-closed cell foam having a density of 120 kg / m ³ , a 50% compression hardness of 4.9 kPa, a thickness of 10 mm, and a bell. A mouse having an effective width of 50 mm along the outer edge of the outer frame of the mouse was used. The maximum suction force of the fan was 1500 Pa.

The elastic layer 4 of the present embodiment uses the material as described above, but if the compression hardness is small and too thin, the outer edge 341 of the bell mouth is in contact with the inner wall 131 of the suction opening 13, and the fan 31. Otherwise, the vibration of the motor 32 propagates to the entire inner wall 131 and the frame of the fan chamber 1. Therefore, the compression hardness, thickness, and area of the elastic layer 4 have a function equivalent to a stopper function that prevents the conventional spring from being extremely compressed, and absorbs vibration even in a compressed state. Therefore, it is necessary to set the thickness to have a vibration isolation function according to the vibration state to be used and the suction capacity of the fan.
In the case of the airtight elastic layer 4 of the above embodiment, the thickness is 10 mm when the fan is stopped. However, when the fan is operated so that the suction force of the fan becomes 1500 Pa, the thickness is compressed by 4 mm. It became 6mm. Even in the state of this thickness of 6 mm, the vibration of the fan chamber 1 was absorbed and the vibration was cut off.

  On the other hand, when the fan is stopped and driven at a low speed, the thrust force is weak or disappears, and the fan motor unit 3 moves to the left as shown by the solid line in FIG. 4 (restores to the original 10 mm). The gap between the inner wall 131 of the suction opening 13 of the chamber 1 and the outer edge 341 of the outer frame of the bell mouth 33 is covered with the elastic layer 4 so that both chambers are airtight. Along with the movement, the elastic layer 4 of the above-mentioned material and shape of the present embodiment also expands by its own restoring force and always acts to cover all the gaps. However, even if there are some gaps when the fan stops, there is no suction action, so there is almost no movement of air, and there is actually no problem with the operation of the air conditioner.

For this elastic layer 4, a material having such a function must be selected. In addition to the material of the embodiment described above, an optimal material is appropriately selected from the following viewpoints, and has a predetermined thickness shape. It may be used by setting to.
That is, the elastic material that can be used as the elastic layer 4 has no air flow, is soft enough to insulate vibration, and suppresses the thrust movement of the fan motor unit 3 (the performance of the vibration absorber 21 is not impaired). The material must have a compressive hardness as high as possible (to reduce the amount of movement of the bell) and be able to be restored. For this reason, the following materials are specifically applicable.
(1) Various rubbers (material itself)
(2) Various rubber foams (closed cell foam and semi-closed cell foam)
(3) Various resin foams (closed cell foam and semi-closed cell foam)
In the above material, if the generated vibration of the fan (blower) is weak, vibration insulation is possible even with the rubber material itself (1). Also, when using a foam (above (2) and (3)), in order to prevent the flow of air, the open form foam cannot prevent the flow of air with an open cell foam. Or “semi-closed cell foam”.

The elastic layer 4 of the first embodiment described above has a quadrangular shape, but the second embodiment has a quadrangular shape by combining a plurality of belt-shaped elastic layers as shown in FIG.
That is, except for the elastic layer 4, since it is the same as that of the first embodiment, only the elastic layer 4 will be described. However, when the outer frame outer edge 341 of the bell mouth 33 is also rectangular, the fan chamber partition plate correspondingly corresponds to this. The suction opening 13 of the fourteen is a rectangular opening, and the belt-like elastic layers 4a to 4d of the plurality of elastic layers 4 are arranged along the openings so as not to have a gap continuously. The adhesive layer 41 is adhered.
Note that the outer size of the outer frame 341 of the bell mouth 33 needs to be slightly larger than the rectangle when the rectangular shape is formed by combining the elastic layers 4a to 4d of the band-like foam. This is because the setting error of the motor unit 3 to the foamed elastic layer 4 is absorbed and the fan motor unit 3 is in contact with the elastic layer 4 even if it is slightly tilted during operation. _
This second embodiment can easily cope with any opening shape, any size and on-site, by appropriately combining the elastic strips 4a to 4d.

Further, in the third embodiment, as shown in FIG. 6, the outer peripheral shape of the elastic layer 4 e is made to be a quadrangle by matching with the quadrangle of the outer edge 341 of the bell mouth 33, and the center opening shape is the maximum outside of the bell mouth 33. A circular shape is formed in accordance with the circle, and the suction opening 13a of the fan chamber partition plate 14 is also a circular opening 42 correspondingly.
That is, since the configuration other than the elastic layer 4e is the same as that of the first embodiment, only the elastic layer 4e will be described, but the outer peripheral shape of the elastic layer 4e is matched with the outer frame outer edge 341 of the bell mouth 33. It is easy to bond 4e to the fan chamber partition plate 14, and the area of the elastic layer 4e can be increased, so that the thickness of the elastic layer 4e can be reduced accordingly.

As described above, in the adhesive fixing method of the elastic layers 4, 4a to d and 4e, the adhesive layer 41 of the elastic layer 4 is provided on the fan chamber partition plate 14 in the first to third embodiments. What is necessary is just to provide in the board side 14 and / or the bell mouth 33 side, and it should just be fixed so that the elastic layer 4 may be located between both.
Further, even when the fan chamber partition plate side 14 or the bell mouth 33 side is bonded and fixed on one side, the elastic layer 4 is compressed during the operation of the fan and no gap is formed, so that the air blocking performance is ensured. Further, even when the elastic layer 4 is not in close contact with both sides when the fan is stopped, the fan motor unit moves toward the fan chamber partition plate side 14 due to the thrust force during operation, so there is no gap during fan operation. Air blocking performance is ensured.

The shapes of the elastic layers 4, 4a to d and 4e are not limited to those shown in the first to third embodiments, but can be any shape (polygon, ellipse) as long as the fan suction port (opening of the bell mouth 33) is not blocked. , Round shape, etc.). However, airtightness must be secured when the fan is driven.
Further, if the outer size of the elastic layer 4 is set to be slightly larger than the outer peripheral fixed surface on the side of the bell mouth 33 except for the second embodiment, the setting error from the fixed position of the elastic layer 4 of the fan motor unit 3 Therefore, even if the fan motor unit 3 is slightly tilted during fan operation, the elastic layer 4 can always be in contact.

As described above, in each of these embodiments, the compression hardness is a hardness that can suppress thrust movement during operation of the fan, and has a predetermined thickness, and the restored thickness of the elastic layer when the fan is stopped. However, since an elastic layer that restores the thickness of the outer edge of the fan suction port and the suction opening of the fan chamber is provided, a member such as a canvas or a thrust prevention spring is not necessary and simple. Can be attached to. In addition, the elastic body has good adhesion (air tightness) in the practical operating range, the level at which the movement of the fan motor unit does not impair the performance of the vibration absorber, and vibration into and out of the air conditioner. There is little transmission.
Further, since the elastic layer is provided on the entire circumference of the suction opening, the thrust load is distributed over the entire surface of the elastic layer, so that the amount of movement of the fan motor unit can be sufficiently suppressed unlike the conventional use of a spring. Furthermore, since the elastic layer is simply bonded and fixed to either the suction opening of the fan chamber or the outer edge of the fan suction port, the fan motor unit can be easily assembled and disassembled into the fan chamber.

  Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired. For example, in the embodiment, the elastic layer is bonded and fixed to the suction opening side of the fan chamber, but of course, it may be fixed to the outer edge side of the fan suction port. In this case, the fan motor unit is assembled to the fan chamber. And disassembly becomes easy. Moreover, depending on the case, you may adhere and fix to both sides of the outer edge of a suction opening and a fan suction opening so that a clearance gap may not arise.

It is a sectional side view of the fan chamber structure of the air conditioner of the 1st Example of this invention. FIG. 2 is a perspective view of FIG. 1. It is a disassembled perspective view centering on the elastic layer of FIG. It is an expanded sectional view explaining operation by enlarging the elastic layer of the Y portion of FIG. It is a perspective view of the fan chamber structure of the 2nd Example of this invention. It is a perspective view of the fan chamber structure of the 3rd Example of this invention. It is a sectional side view of the fan chamber structure of the conventional air conditioner.

Explanation of symbols

F ... Air conditioning room,
DESCRIPTION OF SYMBOLS 1 ... Fan chamber, 11 ... Frame, 12 ... Fan chamber discharge port, 13 ... Suction opening,
131… Inner wall, 14… Fan room divider,
2 ... Vibration isolation frame, 21 ... Vibration absorber, 22 ... Anti-vibration frame, 221 ... End,
3 ... Fan motor unit, 31 ... Fan, 32 ... Motor,
33 ... Bellmouth, 34 ... Outer frame, 341 ... Outer edge,
4, 4a to e ... elastic layer, 41 ... adhesive layer, 42 ... circular opening

Claims (2)

In the air conditioner where the fan motor unit of the fan chamber is placed on the vibration isolation frame,
An airtight elastic layer is provided to maintain airtightness between the suction opening of the fan chamber and the outer edge of the fan suction opening,
The compression hardness of the elastic layer has a thickness that can suppress the thrust movement during operation of the fan and has a thickness that absorbs vibration, and the restored thickness of the elastic layer when the fan stops is the thickness of the fan suction port. A fan chamber structure of an air conditioner, wherein the thickness is restored to a thickness equal to or greater than a distance between an outer edge and a suction opening of the fan chamber.   The fan chamber structure of an air conditioner according to claim 1, wherein the elastic layer is bonded and fixed to at least one of a suction opening of the fan chamber and an outer edge of the fan suction port.

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