JP5868169B2 - Indoor unit for air conditioning - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-suspended air conditioning indoor unit that is hung from a ceiling in an air-conditioned room and performs cooling and heating. It is about.

Conventionally, ceiling-suspended air conditioning indoor units are often of a type in which the entire indoor unit body is exposed indoors. For example, a suspension fitting is attached to a suspension bolt suspended from the ceiling, the indoor unit main body is lifted, and a suspension attachment mounting bolt is set. Then, after the hanging bracket mounting bolt is tightened, the hanging bracket fixing screw that has been removed in advance is tightened to the original position to support the indoor unit body (for example, Non-Patent Document 1). reference).

Conventionally, anti-vibration support for piping connected to an indoor unit for air conditioning has been performed using anti-vibration hanging hardware, anti-vibration rubber, or the like in order to prevent propagation of piping vibration to a building. Main vibration sources include pumps and motors, which are the main equipment of the piping system. These frequencies are relatively high, such as tens to hundreds of Hz. Therefore, vibration-proof rubber is generally used as the vibration-proof material (for example, see Non-Patent Document 2 and Non-Patent Document 3).

In addition, the seismic support of the pipes connected to the indoor unit for air conditioning should be separated from the building frame at appropriate intervals by using seismic support material so that the pipes will not be damaged due to large vibrations and colliding with the building or equipment in the event of an earthquake. It is done by being supported.
For piping around equipment (indoor units, outdoor units, etc.), the flexibility of piping and the necessity of displacement absorbing joints are studied so that the amount of equipment displacement expected during an earthquake can be handled. A seismic support is provided at a position where the connection is not damaged. The installation interval of the seismic support material for piping is determined so that the degree of stress and deformation generated in the piping main body, the support material, the attachment portion with the housing, and the like are less than an allowable value (for example, see Non-Patent Document 4).

For example, a structure described in Patent Document 1 is known as a means for performing the above-described vibration-proof support and earthquake-proof support at the same time. In the structure described in this document, an anti-vibration device is used to prevent the operating vibration of the ceiling suspension machine and duct / pipe from being transmitted through the ceiling suspension bolt to the upper ceiling to which the upper end of the ceiling suspension bolt is fixed. It has been. This vibration isolator has a structure for attenuating operation vibration of the ceiling suspension machine using a vibration isolator made of rubber or metal spring.
However, when a horizontal external force resulting from an earthquake is applied to the ceiling suspension equipment, the ceiling suspension equipment easily shakes in the horizontal direction. Moreover, when a vertical external force is applied to the ceiling suspension equipment, the ceiling suspension equipment moves up and down. Therefore, the ceiling suspension equipment is suspended vertically by ceiling suspension bolts and is also supported and fixed in an oblique direction using an oblique support material. Thereby, it has the structure which performs steadying of a horizontal direction and a vertical direction (for example, refer patent document 1).

Japanese Patent Laid-Open No. 2002-206597 (second page, paragraph 0002, FIG. 8)

Indoor unit installation manual, Mitsubishi Electric indoor unit PCAV-P112 / 140/224 / 280CM-E series, WT05114X04, Mitsubishi Electric Corporation, page 6. Air Conditioning and Sanitary Engineering Handbook 13th Edition, Volume 5 (Materials, Construction and Maintenance), November 30, 2001, issued by Japan Society for Air Conditioning and Hygiene Engineering, page 372, Fig. 5.62, Anti-vibration support example. “Negros General Catalog 2006 / 07A”, May 2006, Negros Denko Co., Ltd., page 272, installation drawing / appropriate load. Air Conditioning / Hygiene Engineering Handbook 13th Edition Volume 5 (Materials / Construction / Maintenance), November 30, 2001, Issued by Japan Society for Air Conditioning and Hygiene Engineering, page 373 Figure 5.64, Seismic support for piping around equipment Example (a).

In a conventional ceiling-suspended air conditioning indoor unit, the vibration isolator (hanging bracket) to prevent vibration propagation to the building and the indoor unit body shakes greatly during an earthquake and collides with buildings and piping, resulting in damage. By using a seismic support bracket (rest bracket) to prevent the vibration, it is possible to individually realize the anti-vibration function for the building and the seismic function of the indoor unit.
However, as in the prior art, when trying to achieve both the anti-vibration function for the building and the anti-seismic function of the indoor unit, the anti-vibration device is used, and the ceiling support bolts are used to suspend the diagonal support material. In the structure where the horizontal and vertical steadying is performed by supporting and fixing in an oblique direction, if horizontal external force or vertical external force due to an earthquake is applied, it is used for the vibration isolator. Because it exceeds the vibration absorption range of the elastic body, rolls and vertical vibrations are easily applied to the indoor unit main body, and the indoor unit main body shakes greatly, causing the indoor unit body to drop, damage to local connection piping, or other ceilings. There was a problem that breakage occurred due to contact with hanging equipment and buildings.
Incidentally, the vibration of the indoor unit main body to be absorbed by the vibration isolator is a vibration having an acceleration of less than about 0.001 to 1 gal, a frequency of about several Hz to several hundred Hz, and an amplitude of about 1 nm to 100 μm. On the other hand, the seismic vibration suppressed by the seismic support has an acceleration of about 1 to 1000 gal, a frequency of about 0.1 to several tens Hz, and an amplitude of about 100 μm to 1 m. It could not be absorbed by the device.

The present invention was made to solve the above-described problems, and is a ceiling-suspended air conditioning indoor unit that can easily achieve both a vibration-proof function for a building and an earthquake-resistant function of the indoor unit. The purpose is to provide.

Air conditioning indoor unit according to the present invention, the indoor unit main body, an upper hanging bolt is suspended on the ceiling of the air conditioning chamber, a lower hanging bolt attached to the lower side of the indoor unit main body, the upper side hanging bolts It is interposed between the lower hanging bolts and a damping mechanism to damp vibration from the indoor unit main body, mounted above the side than the vibration damping mechanism of the indoor unit main body, the upper hanging bolt clearance And a roll suppression mechanism that suppresses the roll of the indoor unit main body .

According to the indoor unit for air conditioning according to the present invention, the vibration control mechanism interposed between the upper suspension bolt and the lower suspension bolt in order to attenuate the vibration from the indoor unit body, and the roll of the indoor unit body In order to suppress the vibration, the rolling suppression mechanism provided in the indoor unit main body in the upper position of the vibration suppression mechanism is provided, so that the vibration from the indoor unit main body is absorbed by the vibration suppression mechanism during normal operation. The motion vibration can be prevented from being transmitted to the ceiling through the upper and lower suspension bolts. On the other hand, when an earthquake occurs, it is possible to suppress a roll vibration with a large amplitude of the indoor unit body caused by the earthquake by a roll suppression mechanism. That is, by being configured as described above, an effect that vibration-proof support and earthquake-proof support can be performed at the same time is obtained.

It is a partial expanded sectional view which shows the vibration proof earthquake proof structure of the ceiling-suspended type air conditioning indoor unit in Embodiment 1 of this invention. It is a front view including the partial cross section which shows the construction example of the vibration proof earthquake proof structure in the said indoor unit for an air conditioning. It is a top view which shows the construction example of the vibration proof earthquake proof structure in the said indoor unit for an air conditioning. It is a top view which shows another construction example of the vibration proof earthquake proof structure in the said indoor unit for an air conditioning. It is explanatory drawing which shows the construction example of the vibration proof earthquake proof structure in the said indoor unit for an air conditioning with a mechanism model. It is a partial expanded sectional view which shows the vibration-proof and earthquake-proof structure of the ceiling-suspended air-conditioning indoor unit in Embodiment 2 of this invention. It is a partial expanded sectional view which shows the vibration-proof and earthquake-proof structure of the ceiling-suspended air-conditioning indoor unit in Embodiment 3 of this invention. It is a front view including the partial cross section which shows the construction example of the vibration proof earthquake proof structure of the ceiling-suspended type air conditioner indoor unit in Embodiment 4 of this invention. It is a front view including the partial cross section which shows the construction example of the vibration proof earthquake proof structure of the ceiling-suspended type air conditioning indoor unit in Embodiment 5 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 to 4, the air conditioning indoor unit according to the first embodiment includes an indoor unit main body 1 that is formed in a box shape with a use side heat exchanger, a blower, and the like of the refrigerant circuit built therein, and a cover in the building. Upper suspension bolts 3, 3, 3 and 3 whose upper ends are suspended by fixing jigs (not shown) such as bolts at the four corners of the ceiling 2 in the air-conditioned room, and the lower portions of the four corners of the indoor unit body 1 in the plan view Lower suspension bolts 6, 6, 6, 6 with lower ends attached to the side surfaces, lower ends of the upper suspension bolts 3 and upper ends of the lower suspension bolts 6 for attenuating vibration from the indoor unit body 1 The side positions of the indoor unit body 1 above the vibration control mechanisms 5 in order to suppress the rolls of the vibration control mechanisms 5, 5, 5, 5 interposed between the unit and the indoor unit body 1 The roll restraining mechanism 20, 20, 20, 20 provided in FIG. Fixing jigs 18 are fixed to the upper positions of the rolling suppression mechanisms 20 in the upper suspension bolts 3, respectively. Each fixing jig 18 is fixed with the other end of the seismic support bracket 8 having one end fixed to the ceiling 2.

  More specifically, flat hanging brackets 7, 7, 7, 7 project from the left and right outwards on the lower side surfaces of the four corners of the indoor unit body 1 in plan view. Each suspension fitting 7 is formed with a through-hole 7A penetrating vertically. The lower end portion of the lower suspension bolt 6 is inserted into each through hole 7A. The inserted lower suspension bolt 6 is fixed to the suspension fitting 7 by washers 12 and 12 and nuts 11, 11, 11 arranged vertically.

  The vibration damping mechanism 5 is formed in a cylindrical shape by penetrating vertically with a cylindrical frame 5A formed in a cylindrical shape in a front view having through holes 5B and 5C on the upper and lower sides, and made of coil spring, rubber, or elastic synthetic resin. The elastic body 4 and nuts 11, 11, and 11 for fixing the upper end portion of the lower suspension bolt 6 and the lower end portion of the upper suspension bolt 3 to the cylindrical frame 5A. That is, on the bottom surface of the rectangular tube frame 5A, a rod-shaped elastic body 4 made of a coil spring, rubber or synthetic resin is placed, and the lower through-hole 5C and the elastic body 4 are inserted through the rectangular tube frame 5A. The upper end of the lower suspension bolt 6 is fixed by the nut 11. On the other hand, the lower end portion of the upper suspension bolt 3 inserted through the upper through-hole 5B of the cylindrical frame 5A is fixed by nuts 11, 11 arranged above and below the cylindrical frame 5A. Thereby, the indoor unit main body 1 is suspended and supported on the ceiling 2 via the elastic body 4, and the elastic body 4 is compressed by the weight of the indoor unit main body 1 and the like.

Each roll restraining mechanism 20 is composed of a flat plate-shaped steady metal plate 9 (an example of a plate member referred to in the present invention) that protrudes outward from upper side surfaces of four corners in plan view of the indoor unit body 1. Each steady-stop sheet metal 9 is formed with a through-hole 10 </ b> A having a diameter larger than the outer diameter of the upper suspension bolt 3 and penetrating vertically. That is, the gap 10 is formed between the outer peripheral surface of the upper suspension bolt 3 inserted through the through hole 10A and the inner peripheral surface 10B of the through hole 10A.

A fixing tool 18 is fixed to a position above the steady rest metal plate 9 in each upper suspension bolt 3. One end of the earthquake-resistant support fitting 8 is fixed to the fixture 18. The other end of the seismic support bracket 8 is fixed to the ceiling 2 so as to be inclined with respect to the ceiling 2. That is, in this indoor unit for air conditioning, the steadying metal plate 9 of the roll suppressing mechanism 20 is disposed between the earthquake-resistant support bracket 8 and the vibration damping mechanism 5. In this case, as shown in FIG. 3, the earthquake-resistant support fittings 8 are attached to the four corners in plan view of the indoor unit body 1 one by one in the direction along the diagonal line. However, as shown in FIG. 4, two seismic support brackets 8 and 8 may be attached to each corner of the air conditioning indoor unit 1 along the direction of the side of the indoor unit body 1.

For example, when the outer dimensions of the indoor unit main body 1 are 600 mm in height, 1145 mm in width, and 900 mm in depth, the upper suspension bolt 3 having a thread designation of M12 is used. At this time, as the gap 10 formed in the steady metal plate 9, a refrigerant pipe (not shown) or a drain pipe (not shown) connecting the indoor unit body 1 and the outdoor unit for air conditioning (not shown) is used. It is desirable that the thickness be about 0.5 to 10 mm so that earthquake vibration can be suppressed in order to suppress breakage.

Next, the operation will be described. The ceiling-suspended air conditioning indoor unit configured in this way performs an operation based on the viscoelastic mechanism model shown in FIG. In this case, the elastic body 4 of the vibration control mechanism 5 serves as a dashpot element, and the steadying sheet metal 9 serves as a spring element, which are connected in parallel between the ceiling 2 and the indoor unit body 1. Yes. That is, during normal operation, the elastic body 4 of the vibration control mechanism 5 is prevented from the indoor unit main body 1 in order to prevent the operating vibration generated from the indoor unit main body 1 from being transmitted to the ceiling 2 via the upper suspension bolt 3. Absorbs driving vibration. At that time, since there is a gap 10 between the steady rest metal plate 9 and the upper suspension bolt 3, vibration from the indoor unit body 1 is avoided from being transmitted to the steady rest metal plate 9, and as a result Vibration transmission to the bolt 3 is also avoided.

On the other hand, when an earthquake occurs, a large amplitude swing (sway in the direction indicated by arrow 16 in FIG. 1) due to the earthquake acts on the indoor unit body 1. The amplitude of the vibration is reduced with the gap 10 provided in the steadying sheet metal 9 of the roll restraining mechanism 20 as the maximum movable range, and as a result, it is possible to prevent a large roll of the indoor unit body 1. In this case, the closer the fixed position between the steady-state metal plate 9 and the earthquake-resistant support bracket 8 is, the greater the effect of suppressing the shake of the indoor unit body 1 against earthquake vibration can be.

  As described above, according to the indoor unit for air conditioning of this embodiment, the function of the vibration damping mechanism 5 and the function of the roll suppression mechanism 20 are configured so as to function without interfering with each other. It is possible to reliably suppress two vibrations having.

Embodiment 2. FIG.
In the first embodiment, the example in which the lateral movable range of the steady metal plate 9 is regulated has been described. However, the second embodiment in which the vertical movable range of the steady metal plate 9 is regulated. This will be described below.
In the indoor unit for air conditioning according to the second embodiment, as shown in FIG. 6, the pitching suppression mechanism 21 is configured by a seated nut 13 disposed at a position higher than the steady plate 9 in the upper suspension bolt 3. Yes. The seated nut 13 is in contact with the lower surface of the steady metal plate 9 swayed up and down to suppress the vertical swing of the indoor unit body 1 (swing in the direction indicated by the arrow 19 in FIG. 6).

As described above, by providing the vertical vibration suppression mechanism 21 in the vicinity of the steady metal plate 9, the vertical vibration can be suppressed together with the horizontal vibration suppression of the seismic vibration.

In the second embodiment, the seated nut 13 constituting the pitching suppression mechanism 21 is disposed below the steady-state sheet metal 9 constituting the rolling suppression mechanism 20, but the present invention is not limited thereto. That is, a pitching suppression mechanism may be provided at a position above the steady rest sheet metal 9. Alternatively, it is also possible to provide a pitching suppression mechanism at both the upper position and the lower position of the steady rest metal plate 9. As described above, if the vertical vibration suppression mechanism is provided at both the vertical positions of the vertical vibration suppression mechanism, the vertical vibration of the indoor unit body 1 can be further suppressed.

Embodiment 3 FIG.
In the first and second embodiments, the through hole 10A of the steady-stop sheet metal 9 and the upper suspension bolt 3 are configured to suppress shaking by contact between metals when an earthquake occurs. Embodiment 3 that can suppress the vibration without any problem will be described below.
In the indoor unit for air conditioning according to the third embodiment, as shown in FIG. 7, the gap 10 between the inner peripheral surface 10 </ b> B of the through hole 10 </ b> A of the steadying metal plate 9 and the outer peripheral surface of the upper suspension bolt 3 is made of rubber or soft. A buffer member 14 made of synthetic resin or the like is provided. The buffer member 14 is formed in a shape similar to a spool for spooling, for example, and is fitted to the inner peripheral surface 10B of the through hole 10A.

As described above, by disposing the buffer member 14 in the gap 10, it is possible to prevent the suspension bolts 3 and 6 from being damaged by the vibration energy increased due to the acceleration of the earthquake vibration.

Embodiment 4 FIG.
In the above-described first to third embodiments, the steady metal plate 9 of the roll suppressing mechanism 20 is provided on the upper portion of the indoor unit main body 1. However, the vibration suppression is performed in consideration of the center of gravity of the indoor unit main body 1. Mode 4 will be described below.
In the indoor unit for air conditioning according to the fourth embodiment, as shown in FIG. 8, the steadying metal plate 9 of the roll restraining mechanism 20 rolls to the indoor unit body 1 at a height equal to the center of gravity 17 of the indoor unit body 1. A steadying metal plate 9 of the suppression mechanism 20 is attached.

  As described above, by providing the steady metal plate 9 at a height equal to the center of gravity 17 of the indoor unit main body 1, the vibration of the indoor unit main body 1 due to the vibration energy increased due to the acceleration of the earthquake vibration is further suppressed. It can be done easily.

Embodiment 5 FIG.
In the first to fourth embodiments, a relatively large space is provided between the indoor unit body 1 and the ceiling 2. However, the present invention includes a configuration in which the space between the indoor unit main body 1 and the ceiling 2 is narrow. That is, in the indoor unit for air conditioning according to the fifth embodiment, as shown in FIG. 9, the indoor unit main body 1 is arranged close to the ceiling 2 as if it is almost in contact with the ceiling 2. The space between them is extremely narrow.

  As described above, even if the indoor unit body 1 and the ceiling 2 are arranged close to each other, the functions of the vibration control mechanism 5 and the steady rest 9 are configured to function without interfering with each other. Therefore, even with such a configuration, two vibrations having different properties can be suppressed.

DESCRIPTION OF SYMBOLS 1 Indoor unit main body 2 Ceiling 3 Upper suspension bolt 4 Elastic body 5 Damping mechanism 5A Cylindrical frame 6 Lower suspension bolt 7 Suspension bracket 9 Stabilization metal plate (plate member)
DESCRIPTION OF SYMBOLS 10 Clearance 10A Through-hole 10B Inner peripheral surface 13 Seated nut 14 Cushioning member 15 Air-conditioned room 16 Arrow 17 Center of gravity 19 Arrow 20 Roll control mechanism 21 Pitch control mechanism

Claims (4)

The indoor unit body,
An upper suspension bolt suspended from the ceiling of the air-conditioned room;
A lower suspension bolt attached to the lower side surface of the indoor unit body;
Are interposed between the front SL upper hanging bolt the lower hanging bolts, the vibration damping mechanism to damp vibration from the indoor unit main body,
The indoor unit body is configured by a plate member that is attached to a side surface of the indoor unit body that is higher than the vibration damping mechanism, and that has a through hole through which the upper suspension bolt penetrates with a gap. A rolling suppression mechanism to suppress,
An indoor unit for air conditioning characterized by comprising: Upper position or lower position than the plate member before Symbol upper hanging bolts, or the upper position and a lower position than the plate member, the plate member that is pitching abuts suppress pitching of the indoor unit body The indoor unit for air conditioning according to claim 1, wherein a pitching suppression mechanism is provided. Between the inner peripheral surface and the upper hanging bolt through hole of the plate member, according to claim 1 or 2 cushioning member having the upper hanging bolt and the gap is characterized in that it is deployed Indoor unit for air conditioning. The indoor unit for air conditioning according to any one of claims 1 to 3, wherein the plate member is provided at a height equal to a center of gravity of the indoor unit main body.

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