JP3532868B2 - Air conditioner motor mounting structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a motor mounting structure for a permanent air conditioner installed indoors.

[0002]

2. Description of the Related Art Generally, an air conditioner is a device for cooling the inside of a room by exchanging heat between indoor air and a refrigerant. Among the air conditioners which perform such a function, there is a permanent air conditioner used for cooling a relatively large space.

FIG. 8 is a side sectional view of an indoor unit of a general permanent air conditioner, FIG. 9a is an exploded side view of a blower of an indoor unit of a general permanent air conditioner, and FIG. 9b is a side view of a general permanent air conditioner. It is a motor top view of an indoor unit.

As shown in the figure, a general permanent air conditioner indoor unit is generally provided with a suction grill 11 at a lower front portion of a casing 10 and a discharge grill 12 at an upper front portion thereof. An exchange 30 and a blower 40 are provided. In particular, in the blower 40, a motor 41 and an impeller 46 are coupled, and the motor 41 is coupled and fixed to an auxiliary steel plate 20 attached to the rear surface of the casing 10. At this time, the motor 4 is placed between the motor 41 and the auxiliary steel plate 20.
Anti-vibration rubber 50 for absorbing the vibration generated by 1.
Is provided.

In the general air conditioner thus constructed, the external air is sucked from the suction grill 11 provided on the front surface of the casing 10 when the impeller 46 is rotated by the motor 41, and is sucked in as described above. The outside air is cooled by the heat exchanger 30 and discharged from the discharge grill 12 provided on the front surface of the casing 10 to cool the room.

[0006] By the way, in the conventional general air conditioner indoor unit, in order to prevent the vibration generated from the motor 41 from being transmitted to the casing 10 as described above, the anti-vibration rubber 50 is used.
Is provided between the motor 41 and the auxiliary steel plate 20. However, since the motor 41 is coupled to and supported by the auxiliary steel plate 20 only at the lower part of the motor in a state where its axis is perpendicular to the auxiliary steel plate 20, most of the load of the motor 41 and the impeller 46 is the motor. 41 and the anti-vibration rubber 50 provided below the rotation axis X of the impeller 46. On the other hand, the motor 4
The load applied to the anti-vibration rubber 50 provided on the upper part of the rotation axis X of No. 1 is small.

Therefore, as shown in FIG. 10, the rotation axis X of the motor 41 and the impeller 46 is the auxiliary steel plate 20.
It will not be perpendicular to, but will be inclined downward by a certain angle θ. As described above, when the motor 41 rotates the impeller in a state where the motor 41 and the impeller 46 droop in the initial stage (while the operation is not yet started after the attachment), excessive vibration causes the vibration of the impeller 46. The vibrational displacement of the tip end of is greatly increased.

When the vibration at the tip of the impeller 46 becomes large, not only the impeller 46 collides with the housing 47 surrounding the outside of the impeller 46 to generate a frictional sound, but also such vibration displacement is larger. In some cases, the impeller 46 may collide with the housing and be damaged.

In particular, even if there is a slight disagreement between the center of rotation of the impeller 46 and the center of mass, the vibrational displacement of the tip of the impeller 46 is greatly increased, but the center of rotation of the impeller 46 and the center of mass are accurately matched. It is not easy to do so due to manufacturing problems such as molds.

FIG. 11 is a graph showing the vibration displacement of the tip of the impeller 46 of the indoor unit of a general permanent air conditioner, which was tested in the state in which the blower was attached to the air conditioner and the initial sag of the impeller 46 occurred. FIG. 6A shows the vibration displacement in the vertical direction, and FIG. 7B shows the vibration displacement in the horizontal direction. Impeller 4 as shown
The longitudinal and lateral displacements of the tip of 6 impeller 46
It shows a large peak at the frequency corresponding to the rotation speed of
Also, it can be seen that the number of revolutions of the impeller 46 increases as the number of revolutions increases.

FIG. 12 is a graph showing the vibration displacement of the tip of the impeller 46, which was tested by separating the blower of the indoor unit of a general permanent air conditioner from the casing, and shows the vibration of the impeller 46 after separating the blower from the air conditioner. The experiment was carried out in the state in which the sagging was prevented. The figure (a) shows the vibration displacement in the vertical direction, and the figure (b) shows the vibration displacement in the horizontal direction. As shown in the figure, the blower 40 was separated from the indoor unit of the air conditioner, and the vibration displacement of the tip of the impeller 46 was tested. As a result, the displacement in the vertical and horizontal directions was slightly smaller than the vibration displacement of the tip of the impeller 46 in FIG. It turns out that

As a result, it can be seen that the initial sag of the motor 41 and the impeller 46 largely affects the vibration displacement of the impeller 46 in the conventional indoor unit of an air conditioner. Further, the initial drooping of the motor 41 and the impeller 46 causes a greater vibration displacement of the tip end portion of the impeller 46 when resonance occurs in the system of the entire air conditioner.

[0013]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art. The rotating shafts of the motor and the impeller hang downward due to the load of the motor and the impeller. And, the purpose thereof is to prevent excessive vibration and noise generated when the impeller rotates.

Another object of the present invention is to prevent the resonance frequency of the entire system of the air conditioner from being included in the rotation frequency of the blower so that the impeller does not collide with the housing of the impeller due to resonance.

[0015]

According to an embodiment of the present invention for achieving the above object, a casing, an auxiliary steel plate attached to a rear surface of the inside of the casing to reinforce the strength of the casing, and an auxiliary steel plate are provided. A motor having a rotating shaft mounted vertically, an impeller axially coupled to the motor, an anti-vibration rubber on an upper side provided between the auxiliary steel plate and the motor, and provided on an upper part of the rotating shaft of the motor, and In an air conditioner configured to include a lower side anti- vibration rubber provided on the lower side of the rotation shaft of the motor, the upper and lower side anti- vibration rubbers have a predetermined height.
It has a cylindrical shape and fits in the middle of the upper and lower parts of the motor.
A matching groove is formed, and the height from the lower part to the groove is
Prevents the motor from tilting due to gravity applied to itself
As compared with the upper side anti-vibration rubber,
Provided is a motor mounting structure for an air conditioner, which is characterized by having a high height.

The present invention also includes a casing, an auxiliary steel plate attached to a rear surface of the inside of the casing to reinforce the strength of the casing, a motor having a rotary shaft vertically attached to the auxiliary steel plate, and a shaft for the motor. An upper side anti-vibration rubber provided between the impeller to be coupled, the auxiliary steel plate and the motor and provided above the rotation shaft of the motor, and a lower anti-vibration rubber provided below the rotation shaft of the motor. In an air conditioner configured to include the above-mentioned upper and lower earthquake-proof rubber ,
Air conditioner motor mounting structure according to claim 1, wherein the this <br/> having an increased rigidity of the lower side BoShin rubber is provided as compared to BoShin rubber.

Further, the present invention is directed to a casing, an auxiliary steel plate attached to a rear surface of the inside of the casing to reinforce the strength of the casing, a motor having a rotary shaft vertically attached to the auxiliary steel plate, and a shaft for the motor. An upper side anti-vibration rubber provided between the impeller to be coupled, the auxiliary steel plate and the motor and provided above the rotation shaft of the motor, and a lower anti-vibration rubber provided below the rotation shaft of the motor. In an air conditioner configured to include the motor , the motor tilts due to gravity applied to itself.
To prevent earthquakes on the lower side of the auxiliary steel plate.
The protrusion that protrudes the part that the rubber contacts to the motor side
Motor mounting structure of the air conditioner, characterized in that the formed are provided.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Since the overall construction of the permanent air conditioner indoor unit according to the present invention is the same as the conventional one, the conventional portion will be referred to for the description thereof. Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings 1 to 7.

FIG. 1 is an exploded view of a blower of a permanent air conditioner indoor unit according to a first example of the first embodiment of the present invention. As shown, the blower 140 of the permanent air conditioner indoor unit according to the first example of the first embodiment of the present invention has the auxiliary steel plate 120 attached to the inner rear surface of the casing 110.
A motor 141 is connected to the auxiliary steel plate 120, an impeller 146 is connected to the motor 141, and a vibration-proof rubber 1 is provided between the motor 141 and the auxiliary steel plate 120.
50 are provided. At this time, the anti-vibration rubber 150 may rotate the rotation axis X of the motor 141 and the impeller 146.
The upper side anti-vibration rubber 151 is provided on the upper side, and the lower side anti-vibration rubber 152 is provided on the lower side of the rotation axis X of the motor 141 and the impeller 146.

The auxiliary steel plate 120 and the motor 141
In detail, the plurality of fastening portions 142 are formed in the motor 141, and the auxiliary steel plate 120 is connected.
An upper side bolt 121 and a lower side bolt 122 are formed on the upper side. In addition, the respective anti-vibration rubbers 151 and 15
2 has holes formed so as to be clamped by the bolts 121 and 122, and the fastening portion 14 of the motor.
2 are fastened so that the fastening grooves 153, 15 are formed on the outer peripheral surface thereof.
4 are formed respectively.

In particular, in the first embodiment of the first embodiment of the present invention, the lower seismic isolation rubber fastening groove 153 is compared to the upper seismic isolation rubber fastening groove 153 to which the motor fastening portion 142 is fastened. 154 was formed so as to be far away from the auxiliary steel plate 120. By forming the fastening grooves 153 and 154 of the anti-vibration rubber as described above, the motor 141 that is fastened to the fastening grooves 153 and 154 of the anti-vibration rubber is the rotating shaft of the motor 141 and the impeller 146. The connecting surface on the lower side with respect to X is farther from the auxiliary steel plate 120 than the connecting surface on the upper side.

That is, the rotation axis X of the motor 141 and the impeller 146 is proportional to the distance difference between the upper groove of the anti-vibration rubber fastening groove 153 and the lower edge of the anti-vibration rubber fastening groove 154. It will be inclined upward (clockwise in the drawing) with respect to the vertical axis of 120. However, in such a state, the load of the motor 141 and the impeller 146 is increased by the respective vibration-proof rubbers 151, 152.
The rotation axis X of the motor 141 and the impeller 146 is perpendicular to the auxiliary steel plate 120. This is because most of the load of the motor 141 and the impeller 146 acts on the lower side anti-vibration rubber 152, and because the material characteristics of the anti-vibration rubber 151, 152, the lower anti-vibration rubber 152 is the motor. 14
This is because the auxiliary steel plate 120 is compressed while receiving the load of 1 and the impeller 146. Of course, the positions of the fastening grooves 153 and 154 formed on the respective anti-vibration rubbers are determined in consideration of the loads of the motor 141 and the impeller 146.

Therefore, the motor 141 and the impeller 1
As the load of 46 increases, the fastening grooves 153, 15
If the distance between the four rubbers is to be increased, or if the use of the anti-vibration rubber 150 is to be minimized, the anti-vibration rubbers 151 and 152 can be formed to have different lengths as shown. That is, it is possible to further form the lower earthquake-proof rubber 152 than the upper earthquake-proof rubber 151. By doing so, in the first example of the first embodiment of the present invention, the initial sagging of the motor 141 and the impeller 146 can be prevented, and the vibration displacement and noise of the tip end portion of the impeller 146 can be reduced. .

FIG. 2 is a schematic view showing that a bead is formed on the casing of the permanent air conditioner indoor unit according to the second embodiment of the first embodiment of the present invention, and FIG. 3 is the first embodiment of the present invention.
FIG. 6 is a perspective view showing various types of beads formed in a casing of a permanent air conditioner indoor unit according to a second example of the embodiment. The overall construction of the permanent air conditioner according to the second embodiment of the first embodiment of the present invention shown is the same as that of the first embodiment described above, and in particular, this embodiment has a rear surface of the casing 110 above the blower 140. A vertical bead 113 is formed.

In the conventional air conditioner indoor unit, generally, a thin steel plate is used on the rear surface of the casing 10 to reduce the weight and cost of the product, so that the casing 10 receives the load of the motor 41 and the impeller 46. As a result, the motor 141 and the impeller 146 were initially sagged. That is, in the present embodiment, in order to solve such a problem, a plurality of vertical beads 113 are formed at regular intervals on the rear surface of the casing 110 as described above,
The strength of the casing 110 is reinforced.

The bead 113 vertically formed on the rear surface of the casing 110 may have various cross-sectional shapes such as a semi-circular cross section as shown in FIG. 3 or a polygon such as a triangle or a quadrangle. is there. After all, the second embodiment of the first embodiment of the present invention can also reduce the vibration displacement and noise at the tip of the impeller 146 by preventing the initial drooping of the motor 141 and the impeller 146.

FIG. 4 is an exploded view of the blower of the permanent air conditioner indoor unit according to the first example of the second embodiment of the present invention.
As shown, the overall configuration of the blower 140 of the permanent air conditioner indoor unit according to the first example of the second embodiment of the present invention is the same as that of the first example of the first embodiment of the present invention.
Particularly, in the first example of the second embodiment of the present invention, in order to prevent the initial drooping of the motor 141 and the impeller 146, the rigidity of the upper side anti-vibration rubber 151 provided on the upper side of the rotation axis X of the motor 141 and the impeller 146 is improved. Compared with this, the rigidity of the lower seismic isolation rubber 152 provided on the lower side of the rotation axis X of the motor 141 is formed to be greater.

That is, the motor 141 and the impeller 14
In view of the fact that most of the load of 6 is concentrated on the lower side seismic isolation rubber 152, the rigidity of the lower side seismic isolation rubber 152 is greatly increased so that the load of the motor 141 and the impeller 146 increases the lower portion. The side anti-vibration rubber 152 should not be compressed and the motor 14
The first and the impeller 146 are prevented from sagging in the initial stage. In addition, the blower 140 of the vibration source is installed in the casing 1
When increasing the rigidity of the anti-vibration rubber 150 fastened to 10,
Although the amount of vibration transmitted from the blower 140 to the casing 110 increases, resonance between the blower 140 and the system can be prevented.

On the contrary, if the rigidity of the anti-vibration rubber 150 is lowered,
Although the amount of vibration transmitted from the blower 140 to the casing 110 is reduced, the vibration of the blower 140 is increased. Therefore, in the present embodiment, by increasing the rigidity of the lower side anti-vibration rubber 152, the entire system of the air conditioner indoor unit has a resonance frequency higher than the frequency applied by the operation, and the vibration transmitted to the casing 110 is reduced. Instead of increasing the transmission and dissipating in the casing 110, the impeller 146
This is to reduce the vibration displacement of.

As described above, in the first example of the second embodiment of the present invention, the vibration displacement at the tip of the impeller 146 can be reduced by increasing the rigidity of the lower seismic isolation rubber 152. Although not shown in the drawings, the casing 1 according to the second embodiment of the present invention as described above from the second embodiment of the first embodiment of the present invention is also described.
A longitudinal bead 113 can be formed on the rear surface of the 10. In addition, according to the first and second embodiments of the present invention, the longitudinal beads 11 are formed on the casing 110 itself.
However, the present invention is not limited to this, and it is also possible to provide an auxiliary member on the rear surface of the upper portion of the casing 110 in which a vertical bead is formed.

Further, the present invention is based on the first embodiment and the second embodiment.
It is also possible to use the embodiments simultaneously. That is, as in the first embodiment, the fastening groove 154 of the earthquake-proof rubber on the lower side of the fastening groove 153 of the earthquake-proof rubber on the upper side is the auxiliary steel plate 120.
At the same time as being formed so as to be far away from, the rigidity of the lower seismic isolation rubber 152 can be made greater than the rigidity of the upper seismic isolation rubber 151 as in the second embodiment.

FIG. 5 is a graph showing the vibration displacement of the impeller tip portion of the permanent air conditioner indoor unit to which the first example of the first embodiment of the present invention and the first example of the second embodiment are applied at the same time. , (A) shows the vertical vibration displacement, and (b) shows the horizontal vibration displacement. As shown, the vibration displacement of the impeller tip of the air conditioner indoor unit according to the present invention is significantly reduced when comparing the vibration displacement of the tip of the conventional impeller with FIG. I understand. Such a result is due to the prevention of the initial sagging of the motor 141 and the impeller 146 and the increase of the rigidity of the seismic isolation rubber 152 on the lower side.

FIG. 6 shows a second embodiment of the first embodiment of the present invention.
It is a graph which shows the vibration displacement of the impeller tip part of the permanent type air conditioner indoor unit which applied the Example and the 1st Example of the 2nd real form simultaneously, Comprising: The vibration displacement of the tip of the impeller is shown in a state in which they are formed so as to be separated from each other, the rigidity of the lower seismic isolation rubber 152 is increased, and the longitudinal beads 113 are formed on the casing 110. (B) is a lateral vibration displacement. Under the above-mentioned conditions, the vertical beads 113 are formed on the casing 110.
It can be seen that the vibration displacement in the vertical direction is further reduced as compared with before the formation of.

FIG. 7 is an exploded view of the blower of the permanent air conditioner indoor unit according to the first example of the third embodiment of the present invention.
As shown, the overall configuration of the blower 140 of the indoor unit of the permanent air conditioner according to the first example of the third embodiment of the present invention is the same as that of the first example of the first embodiment of the present invention. .

In particular, in the first example of the third embodiment of the present invention, the auxiliary steel plate 1 in contact with the lower seismic isolation rubber 152 in order to prevent the initial drooping of the motor 141 and the impeller 146.
A protrusion 125 is formed on the coupling surface of the protrusion 20 to protrude the lower side anti-vibration rubber 152 toward the motor 141. That is, by forming the protrusion 125 higher than the upper bolt 121 around the lower bolt 122 of the auxiliary steel plate on which the lower vibration-proof rubber 152 is sandwiched, the motor 1
When the loads of 41 and the impeller 146 act on the respective vibration-proof rubbers 151 and 152, the initial drooping of the motor 141 and the impeller 146 can be prevented.

In the third embodiment of the present invention, the protruding portion 12
5 is formed on the auxiliary steel plate 120, but can also be formed on the casing 110 when the motor 141 is directly coupled to the casing 110. Further, although not shown, as described in the second example of the first embodiment of the present invention, the casing 1 is also provided in the third embodiment of the present invention.
A longitudinal bead 113 can be formed on the rear surface of the 10.

In the above description, the permanent air conditioner is applied as an example. However, the present invention is applicable to other types of air conditioners in which a motor is vertically connected to and supported by a casing, and dripping occurs due to a load. It is clear that also applies.

[0038]

As described above, the present invention has the following effects.

First, in consideration of the load applied by the motor and the impeller, the fastening groove of the lower seismic isolation rubber is formed farther from the auxiliary steel plate than the fastening groove of the upper seismic isolation rubber. Therefore, when the load of the motor and the impeller is applied to the anti-vibration rubber, the rotation shafts of the motor and the impeller are perpendicular to the auxiliary steel plate and the initial sag is prevented to prevent the vibration displacement and the displacement of the tip of the impeller. It can reduce noise.

Second, by increasing the rigidity of the anti-vibration rubber on the lower side, the initial sag of the motor and impeller is prevented, and the resonance frequency of the system of the entire air conditioner is made higher than the frequency added by the blower to resonate the impeller. It is possible to prevent excessive displacement of the tip of the.

Third, by forming a protrusion on the joint surface of the auxiliary steel plate with which the lower side anti-vibration rubber is in contact, which projects the lower side anti-vibration rubber toward the motor side, the initial sag of the motor and impeller is prevented. This makes it possible to reduce vibration displacement and noise at the tip of the impeller.

Fourthly, a vertical bead is formed on the rear surface of the upper part of the casing to further reduce the vibration displacement of the impeller in the vertical direction.

[Brief description of drawings]

FIG. 1 is an exploded view of a blower of a stationary air conditioner indoor unit according to a first example of the first embodiment of the present invention.

FIG. 2 is a schematic view showing a state in which a bead is formed on a casing of a stationary air conditioner indoor unit according to a second example of the first embodiment of the present invention.

FIG. 3 is a perspective view showing various types of beads formed in a casing of a permanent air conditioner indoor unit according to a second example of the first embodiment of the present invention.

FIG. 4 is an exploded view of a blower of a permanent air conditioner indoor unit according to a first example of the second embodiment of the present invention.

FIG. 5 is a graph showing vibration displacement of the impeller tip portion of the permanent air conditioner indoor unit to which the first embodiment of the first embodiment of the present invention and the first embodiment of the second embodiment are applied at the same time;
Is a vertical vibration displacement, and (b) is a horizontal vibration displacement.

FIG. 6 is a graph showing the vibration displacement of the impeller tip portion of the permanent air conditioner indoor unit to which the second embodiment of the first embodiment of the present invention and the first embodiment of the second embodiment are simultaneously applied;
Is a vertical vibration displacement, and (b) is a horizontal vibration displacement.

FIG. 7 is an exploded view of a blower of a permanent air conditioner indoor unit according to a first example of the third embodiment of the present invention.

FIG. 8 is a side sectional view of a general permanent air conditioner indoor unit.

9A and 9B are views showing a blower of a general permanent air conditioner indoor unit, FIG. 9A is a side exploded view, and FIG. 9B is a plan view of a motor.

FIG. 10 is a side view showing that the rotation shafts of a motor and an impeller in a general permanent air conditioner indoor unit are inclined.

FIG. 11 is a graph showing vibration displacement of the impeller tip portion of a general permanent air conditioner indoor unit, where (a) is vertical vibration displacement and (b) is horizontal vibration displacement.

FIG. 12 is a graph showing the vibration displacement of the impeller tip part that was tested by separating the blower of a general permanent air conditioner indoor unit from the casing.
(B) is a lateral vibration displacement.

[Explanation of symbols]

110 ... Casing 113 ... Bead 120 ... Auxiliary steel plate 125 ... Projection 140 ... Blower 141 ... Motor 146 ... Impeller 150 ... Anti-vibration rubber 151 ... Anti-vibration rubber on the upper side 152 ... bottom anti-vibration rubber 153 ... Fastening groove of the anti-vibration rubber on the upper side 154 ... Bottom groove of anti-vibration rubber X ... Rotating shaft of motor and impeller

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-8-178360 (JP, A) JP-A-2000-134862 (JP, A) JP-A-59-93130 (JP, A) JP-A-6-307661 (JP, A) JP 10-148353 (JP, A) JP 6-159296 (JP, A) Actually open 57-163525 (JP, U) Actually open 1-63919 (JP, U) (JP, A) 58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 1/00 321 H02K 5/24 H02K 7/14

Claims (4)

(57) [Claims] 1. A casing, an auxiliary steel plate attached to a rear surface of the inside of the casing to reinforce the strength of the casing, a motor having a rotary shaft vertically attached to the auxiliary steel plate, and an impeller connected to the motor. An upper side anti-vibration rubber provided between the auxiliary steel plate and the motor, the upper side anti-vibration rubber being provided above the motor rotation shaft, and a lower side anti-vibration rubber provided below the motor rotation shaft. In the air conditioner, the upper and lower seismic isolation rubbers are cylindrical
And fit in the fastening part of the motor in the middle between the upper and lower sides.
The groove is formed and the height from the lower part to the groove is
To prevent the motor from tilting due to gravity
The height of the lower seismic isolation rubber is higher than that of the upper seismic isolation rubber.
Air conditioner motor mounting structure, characterized in that Kushida. 2. The upper and lower seismic isolation rubbers are
The lower side seismic rubber has a higher rigidity than the lower side seismic
Air conditioner motor mounting structure according to claim 1, wherein the a. 3. A casing and a rear portion inside the casing
Surface mounted to reinforce the strength of the casing.
The auxiliary steel plate and the rotary shaft are vertically attached to the auxiliary steel plate.
Motor and an impeller connected to the motor
And between the auxiliary steel plate and the motor,
The upper side seismic proof rubber provided on the upper part of the rotating shaft of the motor
And the lower side provided below the rotary shaft of the motor
In an air conditioner configured to include the anti-vibration rubber, the motor is prevented from tilting due to gravity applied to itself.
So that the seismic rubber on the lower side contacts the auxiliary steel plate
A motor mounting structure for an air conditioner, characterized in that a protruding portion is formed by protruding a portion to the motor side . 4. A vertical bi rear surface of the casing upper part
A contract characterized in that a plurality of strips are formed at regular intervals.
The motor mounting structure for an air conditioner according to claim 1 or 3 .