JPH07139753A - Indoor machine of air conditioner - Google Patents

Abstract

PURPOSE:To lighten the weight of an indoor machine and to lower the noise thereof by a method wherein a rising part increasing flexural rigidity is provided in a part from the blowing-sucking machine supporting position of a top plate to the fitting part of a suspending metal fitting of a side plate. CONSTITUTION:A rising part 14 increasing the flexural rigidity of a top plate 2 and a side plate 3 is provided continuously from the blowing-sucking machine supporting position of the top plate 2 constructing a housing 1 to the fitting part of a suspending metal fitting 12 provided on the side plate 3. Therefore the load of a blowing-sucking machine can be distributed through a part from the supporting position of the blowing-sucking machine to the fitting part of the suspending metal fitting 12 without causing the concentration of stress. According to this constitution, the rigidity of the housing 1 can be made high, the deflection of the top plate 2 can be lessened and the noise of an indoor machine can be reduced, while it is possible to make the housing 1 of a thin plate and to lighten the weight of the indoor machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner, and more specifically to an indoor unit of an air conditioner of a ceiling-embedded type air conditioner in which the weight and vibration of the indoor unit housing are reduced. It is about machines.

[0002]

2. Description of the Related Art Regarding the weight reduction of an indoor unit of a ceiling-embedded air conditioner, there are those described in Japanese Patent Application Laid-Open Nos. 2-57791 and 3-271640.

In the former Japanese Patent Laid-Open No. 2-57791,
The side plate is made of aluminum, paper, resin or the like and has a honeycomb structure, or is processed into a ribbon shape or a flute shape, and is adhered to the side plate to form an integrated panel for weight reduction.

Also, in the latter Japanese Patent Laid-Open No. 3-271640, the side plate is composed of a panel having an air layer formed by a center core and flat plates sandwiching both sides thereof, and the number of parts for obtaining a heat insulating effect is reduced. It is possible to reduce the weight and reduce the weight.

[0005]

As described in the above-mentioned prior art, in the indoor unit of the air conditioner, the weight is reduced to improve its installation efficiency and worker's safety. There is. On the other hand, in the indoor unit, noise reduction is indispensable in order to improve comfort in addition to the above-mentioned weight reduction.

However, the mower housed in the indoor unit
Since the heat exchanger, heat exchanger, etc. are generally attached to the top plate that constitutes the housing, the deflection of the top plate due to the weight reduction becomes a problem, and the rigidity of the top plate decreases, and The vibration of the top plate increases due to the vibration force transmitted from the vibration source, which adversely affects noise reduction. Thinning the housing is an effective means for reducing the weight of the indoor unit, but when attempting to thin the housing in this manner, there is a contradictory drawback that the rigidity thereof decreases. As described above, when the rigidity of the indoor unit housing is reduced due to the weight reduction, the vibration of the housing cannot be sufficiently suppressed, and the noise cannot be reduced.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an indoor unit of an air conditioner which can reduce the weight and noise of the indoor unit. To do.

[0008]

In order to achieve the above object, the present invention provides a top plate supporting a blower and a heat exchanger,
In an indoor unit of an air conditioner provided with a housing that extends substantially orthogonally from the top plate and has a side plate provided with a hanging metal fitting mounting portion, from a support position of the blower supported by the top plate. An annular rib is provided at a portion of the side plate up to the hanging metal fitting mounting portion, a housing provided with a rising portion that enhances bending rigidity of the top plate and the side plate, and a support position portion of the blower supported by the top plate. It is characterized by including a housing provided with.

[0009]

In the present invention, the rising portion for enhancing the bending rigidity of the top plate and the side plate is continuously provided from the supporting position of the blower / sucker of the top plate forming the housing to the hanging metal fitting mounting portion provided on the side plate. The load of the air blower from the support position of the air blower to the mounting part
It can be flowed without causing stress concentration. As a result, it is possible to increase the rigidity of the housing, suppress the deflection of the top plate, reduce the noise of the indoor unit, and reduce the thickness of the housing, thus reducing the weight of the indoor unit. You can Further, by providing the annular rib at the supporting position of the blower / sucker, the vibration transmitted from the motor to the housing can be reduced, and as a result, the noise of the indoor unit can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show one embodiment of the indoor unit of the present invention. FIG. 1 is a top view of the indoor unit, and FIG. 2 is FIG.
FIG. In these figures, reference numeral 1 is a housing constituting an indoor unit. The housing 1 is composed of a top plate 2 and side plates 3. The top plate 2 and the side plates 3 are plate members. At the lower end of the side plate 3,
A panel 4 located at the opening in the ceiling is provided. The top plate 2 has a fan 5 as an air blower, a motor 6 for driving the fan 5, and a heat exchanger 7 arranged around them.
Is supported. A water receiver 8 is provided below the heat exchanger 7. The drain accumulated in the water receiver 8 is discharged to the outside by the drain pump 30. Reference numeral 17 is a supporting position of the motor 6, and 22 is a supporting position of the present invention.
It is an annular recess provided around the.

In addition, heat insulating materials are attached to the inside and outside of the top plate 2 and the side plate 3 in order to insulate heat and prevent dew condensation due to the difference between the temperature inside the indoor unit and the temperature inside the ceiling. . However, the heat insulating material is not shown because it is not an important constituent element of the present invention.

Next, detailed structures of the top plate 2 and the side plate 3 described above will be described with reference to FIG.

FIG. 3 shows an installed state of one embodiment of the indoor unit of the present invention shown in FIG. 1. In this drawing, the indoor unit is mounted on a ceiling (not shown) by means of a hanging bracket 12 and hanging bolts 13. Hangs on. The indoor unit is installed in the ceiling, and only the panel 4 is exposed to the indoor side. The top plate 2 and the side plate 3 are provided on the top plate 2 and
A rising portion 14 is provided in a portion from the motor supporting position to the hanging metal fitting 12 of the side plate 3. This rising part 14
Is formed by a convex portion 15 protruding outward with respect to the surfaces of the top plate 2 and the side plate 3.

The fan 5, the driving motor 6 and the heat exchanger 7 are supported by the top plate 2. In this figure
The support position 17 of the printer is shown. The top plate 2 has a
In order to increase the local rigidity of the support position 17 part of the
An annular recess 22 is provided so as to surround the support position 17.

FIG. 4 is an exploded perspective view showing in more detail the housing 1 constituting the present invention shown in FIG. Here, the side plates 3 a and 3 b having the hanging metal fitting set screw holes 16 for attaching the hanging metal fitting 12 are integrated with the top plate 2. Reference numeral 17 denotes a support position of the motor 6, and the motor 6 and the fan 5 are attached to the central portion of the top plate 2. A convex portion 15 is provided on the top plate 2 and the side plates 3a and 3b.

In this embodiment, there is provided a convex portion 15 which is continuous from the motor supporting position 17 to the hanging metal fixing screw hole 16. Note that 3c and 3d are the other side plates.

Next, the operation of the embodiment of the indoor unit of the present invention described above will be described.

First, the static characteristics of the indoor unit of the present invention will be described.

FIG. 5 shows the state of the deflection distribution of the top plate 2 which constitutes the indoor unit of the present invention shown in FIG. In addition,
The deflection distribution of the top plate 2 here indicates the deflection distribution of the cross section AA of the top view when the motor 6 and the fan 5 that have the greatest influence on the deflection of the top plate 2 are attached to the top plate 2. There is. As is clear from FIG. 5, the deflection of the top plate 2 changes smoothly without causing stress concentration in the central portion of the top plate 2.

The smooth change of the deflection of the top plate 2 will be described in more detail. At the boundary between the convex portion 15 formed on the top plate 2 and the side plate 3 and the top plate 2 and the side plate 3, the top plate is formed. A rising portion 14 that enhances the bending rigidity of the side plate 3 and the side plate 3 is formed. By forming the rising portion 14 on the top plate 2 and the side plate 3, the load of the motor 6 and the fan 5 is first increased by the rising portion 1 provided on the top plate 2.
4 to the corner portion of the housing 1, that is, near the ridgeline of the top plate and the side plate (not shown), and further to the hanging metal set screw hole 16. In this way, the force is applied to the housing 1
It is possible to reduce the stress concentration at the central portion of the top plate 2 by allowing the air to flow into the hanging portion and the hanging screw set screw hole 16. As a result, the deflection of the top plate 2 can be suppressed to be small.

With the above structure, the rigidity of the housing 1 can be increased, and the weight of the indoor unit can be reduced (the housing can be thinned). That is, as shown in FIG. 6, for example, the allowable displacement amount per 1 kgf is 0.
In case of about 125 mm, the thickness of the housing 1 is 0.5 m
It can be thinned to about m.

Next, the dynamic characteristics of the indoor unit of the present invention will be described.

FIG. 7 is a view showing a mounting state of the motor 6. The mounting legs 23 of the motor 6 are provided with anti-vibration rubbers 25, 26.
It is attached to the top plate 2 via. Vibrations transmitted from the motor 6 to the top plate 2 can be reduced by the vibration proof rubber 24. The annular recess 22 provided so as to surround the motor supporting position 17 serves to increase the vibration damping effect of the vibration damping rubber 24.

FIG. 8 shows the difference in the vibration isolation effect depending on the presence or absence of the annular recess 22. In reducing the electromagnetic noise of the indoor unit, it is important to reduce the peak of twice or four times the power supply frequency (50 Hz, 60 Hz). In FIG. 8, paying attention to those frequencies, the vibration isolation effect up to 300 Hz is shown. In the figure, if it is smaller than 0 dB, it means that the vibration damping effect is obtained.

It can be seen that the provision of the annular recess 22 improves the vibration damping effect by about 5 dB as compared with the case where the annular recess 22 is not provided. This is an annular recess 22
By providing the motor, the local rigidity of the motor supporting position 17 is increased, and the deformation of the anti-vibration rubber and the deformation of the top plate when the vibration force from the motor is transmitted to the top plate can be suppressed to a small level. Because you can.

From this, it can be seen that the provision of the annular recess 22 is effective for reducing electromagnetic noise.

Further, by providing the annular concave portion 22, it is possible to suppress the deformation of the top plate when a variable load is applied to the support bolt 21 of the motor 6 (this is called prevention of the support bolt from falling down). ). As a result, when the motor and the support bolt are in contact with each other or the nut is tightened, the support bolt does not fall down.

From the standpoint of production engineering, the indoor unit of the present invention described above is light in weight and prevents the support bolts 21 from collapsing, thus facilitating transportation and mounting of motors. There is an effect that the property is improved.

FIG. 9 shows another embodiment of the indoor unit of the present invention. In FIG. 9, the same reference numerals as those in FIG. 4 denote the same parts. In this embodiment, the height of the rising portion 14 near the corner portion of the housing 1 is made lower than the heights of the other rising portions 14 from the viewpoint of production technology.

Even with this structure, it is possible to reduce the weight and noise of the indoor unit as in the above-described embodiment.

FIG. 10 shows still another embodiment of the indoor unit of the present invention. In FIG. 10, the same reference numerals as in FIG. 4 denote the same parts. In this embodiment, the rising portion 14 is provided only on the top plate 2.

Even with such a configuration, the weight reduction and noise reduction of the indoor unit can be achieved as in the above-described embodiment. Further, it is effective from the viewpoint of production technology and also effective when the rising portion 14 cannot be provided on the side plate 3.

FIG. 11 shows another embodiment of the indoor unit of the present invention. In FIG. 11, the same reference numerals as in FIG. 4 denote the same parts. In this embodiment, the top plate 2 is integrally formed.
The side plate 3 is provided with a rising portion 14.

Even with this construction, it is possible to achieve a reduction in the weight and noise of the indoor unit as in the above-described embodiment.

FIG. 12 shows still another embodiment of the indoor unit of the present invention. In FIG. 12, the same reference numerals as those in FIG. 4 denote the same parts. In this embodiment, the rising portion 14 which is continuous from the support position 17 of the motor 6 to the hanging metal fixing screw hole 16 is provided on the top plate 2 and the side plate 3.

Even with such a configuration, it is possible to achieve weight reduction and noise reduction of the indoor unit as in the above-described embodiment. Although two rising portions 14 are provided in parallel in this embodiment, any number may be provided. Further, in the arrangement provided with the rising portion 14 which is continuous from the supporting position 17 of the motor 6 to the hanging metal fixing screw hole 16, the rising portion 14 of the top plate 2 completely surrounds the supporting position 17 of the motor 6. Any arrangement is acceptable as long as it is not.

FIG. 13 shows another embodiment of the indoor unit of the present invention. In FIG. 13, the same reference numerals as in FIG. 4 denote the same parts. In this embodiment, the top plate 2 and the side plate 3 are
A separate member 18 for forming the rising portion 14 is attached.

Even with such a configuration, it is possible to achieve the weight reduction and noise reduction of the indoor unit as in the above-mentioned embodiment. Further, the shape of the separate member 18 may be any shape such as an L-shape or a U-shape.

In the above-described embodiment, the projections having a trapezoidal cross section are formed on the top plate 2 and the side plates 3 in order to form the rising portions 14, but the cross section has an arc shape, a triangle shape, and a hairpin. It is possible to form into shapes and the like, and it is also possible to use these shapes in combination. It is also possible to provide the rising portion 14 inside the top plate 2 and the side plate 3.

FIG. 14 shows another embodiment of the concave portion provided at the supporting position 17 of the fan 5 and the driving motor 6 thereof.

FIG. 14 shows still another embodiment of the indoor unit of the present invention. FIG. 14 is a top view of FIG. 4, showing the details of the supporting position 17 of the motor 6. is there. Although a ring-shaped recess is provided around the support position 17 in FIG. 4, a recess 33 that extends radially from the support position 17 may be provided as shown in this figure. Even with this configuration, the same effect as that of the above-described embodiment can be obtained.

FIG. 15 shows another embodiment of the indoor unit of the present invention. In FIG. 15, the same reference numerals as in FIG. 14 denote the same parts. In this embodiment, a semi-circular recess is further provided outside the ring-shaped recess 22 provided around the support position 17, and the recess is doubled. Even with this configuration, the same effect as that of the above-described embodiment can be obtained. FIG. 16 shows an example in which a recess 31 parallel to the rising portion 14 is further added to the embodiment of FIG. With this configuration, the rigidity in the direction along the rising portion 14 can be further increased, and the support bolt 21 can be prevented from falling.

17 and 18 show another embodiment of the indoor unit according to the present invention. In these figures, the same symbols as those in FIG. 14 are the same parts. FIG. 17 shows a ring-shaped recess 22 (the embodiment of FIG. 4) and a recess 33 extending radially.
FIG. 18 shows a combination of (Example of FIG. 14).
It is a combination of the embodiment of FIG. 5 and the embodiment of FIG. Even with this configuration, the same effect as that of the above-described embodiment can be obtained.

FIG. 19 shows another embodiment of the indoor unit of the present invention. In FIG. 19, the same reference numerals as those in FIG. 14 denote the same parts. In this embodiment, another member 32 is provided around the support position 17 instead of the rising portion. Even with this configuration, similar to the above-described embodiment,
The local rigidity of the portion of the support position 17 can be increased.

Continuously provided from the support position 17 of the motor 6 of the top plate 2 to the hanging screw set screw hole 16 of the side plate 5 described above. Provided at the rising portion and the support position of the motor 6. By combining with the rising part, it is possible to achieve a reduction in the weight and noise of the indoor unit.

[0047]

According to the present invention, since a highly rigid and lightweight housing can be manufactured, there is an effect that the installation efficiency of the indoor unit is improved. In addition, by reducing the weight,
Worker safety is also improved. Further, by increasing the rigidity of the housing, the vibration of the housing can be suppressed to a low level, and the noise of the indoor unit can be reduced.

[Brief description of drawings]

FIG. 1 is a top view of an example of an indoor unit of an air conditioner of the present invention.

FIG. 2 is a cross-sectional view of an embodiment of the indoor unit of the present invention shown in FIG.

FIG. 3 is a perspective view showing an installed state of one embodiment of the indoor unit of the present invention shown in FIG.

FIG. 4 is a perspective view of a housing constituting the indoor unit of the present invention shown in FIG.

FIG. 5 is a diagram showing a flexure distribution state of a top plate of a housing constituting the indoor unit of the present invention shown in FIG.

FIG. 6 is a characteristic diagram showing thinning of the top plate of the housing constituting the indoor unit of the present invention shown in FIG.

FIG. 7 is a cross-sectional view showing a motor mounting portion of a housing constituting the indoor unit of the present invention shown in FIG.

FIG. 8 is a characteristic diagram showing a vibration isolation characteristic of a housing constituting the indoor unit of the present invention.

FIG. 9 is a perspective view showing another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 10 is a perspective view showing still another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 11 is a perspective view showing another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 12 is a plan view showing still another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 13 is a perspective view showing another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 14 is a top view showing still another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 15 is a top view showing another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 16 is a top view showing still another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 17 is a top view showing another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 18 is a top view showing still another embodiment of the housing constituting the indoor unit of the present invention.

FIG. 19 is a top view showing another embodiment of the housing constituting the indoor unit of the present invention.

[Explanation of symbols]

1 ... Housing, 2 ... Top plate, 3 ... Side plate, 4 ... Panel, 5
... Fan, 6 ... Motor, 7 ... Heat exchanger, 12 ... Suspension fitting, 13 ... Suspension bolt, 14 ... Standing part, 15 ... Convex part, 16 ... Suspension fitting set screw hole, 17 ... Motor support position , 18 ... Separate member, 21 ... Support bolt, 22 ... Annular recess, 28 ... Washer, 29 ... Nut.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Joji Okamoto 390 Muramatsu, Shimizu, Shizuoka Prefecture, Hitachi Air Conditioning Systems Division (72) Inventor Yu Kunikata 390, Muramatsu, Shimizu, Shizuoka Prefecture Air Conditioning Systems, Hitachi, Ltd. (72) Inventor Minoru Sato 390 Muramatsu, Shimizu-shi, Shizuoka Hitachi Air Conditioning Systems Division (72) Inventor Shunji Sasaki 390 Muramatsu, Shimizu, Shizuoka Hitachi Air Conditioning Systems Division

Claims (10)

[Claims] 1. A ceiling metal plate for supporting the air blowing and sucking means and the heat exchanging means, and a side plate provided with a hanging metal fitting mounting portion, and a metal fitting for hanging the side plate from a supporting position of the air blowing means of the top plate. In an indoor unit of an air conditioner including a housing provided with a rising portion that enhances bending rigidity of a top plate and a side plate in a portion up to a mounting portion, a portion of the top plate at a supporting position of an air-blowing means, the portion thereof. An indoor unit for an air conditioner, which is provided with an annular rising portion that enhances the rigidity of the air conditioner. 2. A ceiling metal plate for supporting the air blowing and sucking means and the heat exchanging means, and a side plate provided with a hanging metal fitting mounting portion. In an indoor unit of an air conditioner including a housing provided with a rising portion that enhances bending rigidity of a top plate and a side plate in a portion up to a mounting portion, a portion of the top plate at a supporting position of an air-blowing means, the portion thereof. An indoor unit of an air conditioner, which is provided with a rising portion that extends radially from the support position in order to increase the rigidity of the air conditioner. 3. A ceiling plate for supporting the blower / sucker unit and the heat exchange unit and a side plate provided with a suspending metal fitting mounting portion, and a suspending member for the side plate from the supporting position of the blower unit on the ceiling plate. In an indoor unit of an air conditioner including a housing provided with a rising portion that enhances bending rigidity of a top plate and a side plate in a portion up to a mounting portion, a portion of the top plate at a supporting position of an air-blowing means, the portion thereof. An indoor unit for an air conditioner, which is provided with a plurality of annular rising portions that enhance the rigidity of the air conditioner. 4. A ceiling metal plate for supporting the air blowing and sucking means and the heat exchanging means, and a side plate provided with a hanging metal fitting mounting portion, and a metal hanging bracket for the side plate from the supporting position of the air blowing and sucking means of the top plate. In an indoor unit of an air conditioner including a housing provided with a rising portion that enhances bending rigidity of a top plate and a side plate in a portion up to a mounting portion, a portion of the top plate at a supporting position of an air-blowing means, the portion thereof. An indoor unit for an air conditioner, which is provided with a member for enhancing the rigidity of the air conditioner. 5. The indoor unit for an air conditioner according to claim 1, wherein a rising portion provided in parallel with a rising portion provided to increase bending rigidity of the top plate and the side plate is provided with the rising portion. An indoor unit for an air conditioner, which is provided in a portion from a support position of a blower / sucker unit to another support position. 6. The indoor unit of an air conditioner according to claim 1, wherein the top plate and the side plate provided with the hanging metal fitting mounting portion are integrally formed. An air conditioner indoor unit characterized by. 7. The indoor unit of an air conditioner according to claim 1, wherein the indoor unit is provided in a portion from a supporting position of the air blower / intake means of the top plate to a hanging metal fitting mounting portion of the side plate. An indoor unit of an air conditioner, wherein the rising part is formed continuously with the top plate and the side plate. 8. An indoor unit of an air conditioner according to claim 1, wherein the air conditioner is provided in a portion from a supporting position of a blower / intake means of the top plate to a hanging metal fitting mounting portion of the side plate. The rising unit is formed outside the top plate and the side plate. 9. The indoor unit of an air conditioner according to claim 1, wherein the air conditioner is provided in a portion from a supporting position of the blower / intake means of the top plate to a hanging metal fitting mounting portion of the side plate. An indoor unit of an air conditioner, wherein the rising portion is formed inside the top plate and the side plate. 10. A ceiling plate for supporting the air blowing and sucking means and the heat exchanging means, and a side plate provided with a hanging metal fitting mounting portion, and a hanging metal plate for the side plate from a supporting position of the air blowing and sucking means of the ceiling plate. In an indoor unit of an air conditioner including a housing provided with a member for increasing bending rigidity of a top plate and a side plate in a portion up to a mounting portion, in a portion of a supporting position of the blower / intake means of the top plate, An indoor unit for an air conditioner, which is provided with an annular rising portion that enhances rigidity.