JP3168936B2 - Air conditioner - 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 of a recessed ceiling type or a ceiling suspended type for raising and lowering a suction grill and the like.

[0002]

2. Description of the Related Art Conventionally, as an air conditioner, a conventional air conditioner has been proposed.
There is one described in Japanese Patent No. 40727. As shown in FIG. 4, the air conditioner is provided with a casing 101 embedded in a ceiling, a heat exchanger 102 disposed in the casing 101, and disposed substantially at the center in the casing 101, and A blower fan 103 that blows the sucked air into a room through a heat exchanger 102 is provided, and a suction grill 105 having a detachable air filter 104 and a suction grill 105 below the casing 101 are substantially provided. Ceiling panel 10 mounted in the center
6 is provided. An entire ceiling panel 106 having a suction grill 105 to which the air filter 104 is attached is suspended by a wire 108 wound around a pulley 107 that can be rotated forward / reversely.

As shown in FIG. 5, the air conditioner has a worm gear 1 fixed to an output shaft of a motor 110.
11 and a gear 112 meshing with the worm gear 111
And a drive shaft 113 connected to the shaft of the gear 112. Pulleys 107 are provided at both ends of the drive shaft 113.
Are attached via a torque limiter 114, respectively.

In the air conditioner having the above structure, the motor 1 is used for maintenance such as cleaning of the air filter 104.
10, the pulley 107 is rotated through the worm gear 111, the gear 112, the drive shaft 113 and the torque limiter 114, and the wire 10 is rotated by the pulley 107.
8 by lifting / lowering the ceiling panel 10.
6 is moved up and down.

FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5. The torque limiter 114 is fixed to one end of a pulley 107 and has mounting portions 115, 115 which sandwich a driving shaft 113. And a spring 116 for tightening the mounting portions 115 from the outside. When the driving load of the pulley 107 exceeds a predetermined value, the torque limiter 114 slides on the inner peripheral surface of the mounting portion 115 with respect to the outer peripheral surface of the driving shaft 113, and the driving shaft 113 idles.
The rotation of 07 stops.

Thus, in the air conditioner, the torque limiter 1 is provided between the motor 110 and the pulley 107.
With the interposition of 14, the ceiling panel 106 is stored in a predetermined position while adjusting the suspension length of the wire 108 without overloading the motor 110.

[0007]

By the way, in the above-mentioned air conditioner, the set torque of the torque limiter 114 needs to be larger than the load on the ceiling panel 106 and smaller than the lock torque of the motor 110. However,
Due to the structure utilizing the friction of the torque limiter 114, there is a large variation in the set torque, and the lock torque of the motor 110 needs to be sufficiently larger than the set torque of the torque limiter 114. . Further, since the torque limiter 114 is worn due to aging and the set torque is reduced, it is necessary to use a motor having a larger set torque in advance in consideration of the wear. Need to be used.

SUMMARY OF THE INVENTION An object of the present invention is to provide a low-cost and highly reliable air conditioner that can be raised and lowered so as to securely accommodate a suction grill or a ceiling panel at a predetermined location with a simple structure.

[0009]

In order to achieve the above object, an air conditioner according to the present invention is characterized in that a suction grill or a ceiling panel is suspended by a suspension member, and the suspension member is suspended by a pulley driven by a motor. In the air conditioner that raises and lowers the suction grille or the ceiling panel by hoisting and lowering, the pulley side and the motor side
With both ends fixed to the bets, the rotational force of the motor with conveying to the pulley, the load torque of the pulley is gradually elastically deformed becomes equal to or larger than a predetermined size, the
A damper spring for absorbing a rotational difference between the pulley and the motor by elastic deformation is provided.

In the above air conditioner, for example, the suction grille suspended by a plurality of suspension members is lowered from the storage portion on the main body side, and after the air filter of the suction grille is cleaned and the like, the suction grille is removed. In the case where the pulley is stored in the storage section on the main body side, each pulley is rotated in the winding direction by the motor, and the suction grill is raised. At this time, if the suction grill is inclined with respect to the opening plane of the storage section on the main body side due to variation in the hanging length of the hanging member that suspends the suction grill, the hanging length is hung by the short hanging member. The suction grille side reaches the storage part on the main body side first. Then, stops the rotation of the hanging hanging length shorter pulley member, the load torque of the pulley is equal to or greater than a predetermined magnitude, the pulley side and the motor side and the secondary-Car
The damper spring, whose end is fixed, is gradually elastically deformed, and the elastic deformation absorbs a rotation difference between the pulley and the motor. Then, while absorbing the rotation difference between the pulled-up pulley and the motor, the other hanging member, which has a long hanging length and has not been wound up, is wound up, and the remaining part of the suction grille is removed from the main body side. While being housed in the storage section, the suction grill is brought into close contact with the storage section on the main body side by the spring force of the damper spring. Therefore, there is no need to increase the motor torque as in the case of using a torque limiter or the like that has a large variation and a short life. A low-cost and highly reliable air conditioner can be realized.

[0011] The air conditioner of the second aspect is the first aspect of the invention.
In the above air conditioner, the damper spring is incorporated in a hollow portion of the pulley.

According to the air conditioner of the second aspect, since the damper spring is built in the pulley, the lifting mechanism of the suction grill or the ceiling panel can be reduced in size.

[0013] The air conditioner according to claim 3 is based on claim 2.
In the air conditioner, a guide rod fixed to the pulley and provided in the hollow portion is provided, and the damper spring is a coil spring, and the inner peripheral surface of the hollow portion of the pulley and the guide rod are provided. Is disposed between the outer peripheral surface and the outer peripheral surface.

According to the air conditioner of the third aspect, when the load torque of the pulley becomes a predetermined magnitude and the rotation difference between the pulley and the motor is absorbed, the coil spring gradually moves to the guide rod. By winding the coil spring strongly and guiding the coil spring by the inner peripheral surface of the pulley and the outer peripheral surface of the guide rod, the coil spring functions normally as a damper spring without buckling.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an air conditioner according to the present invention will be described in detail with reference to the illustrated embodiments.

(First Embodiment) FIG. 1 is a perspective view of an essential part of an air conditioner according to a first embodiment of the present invention, wherein 1 is a substantially square ceiling panel having a storage part 1a opening in a substantially square shape. Reference numeral 2 denotes an intake grill housed in the storage section 1a of the ceiling panel 1, and 3 denotes an air filter detachably attached to the intake grill 2. Nearly four sides of the ceiling panel are each provided with a substantially rectangular outlet 1b along the outer edge.

Pulleys 15, 15 are respectively arranged at substantially the centers of two opposing sides of the storage portion 1a of the ceiling panel 1. Further, a motor 1 capable of reverse rotation is provided substantially at the center of the other side of the storage section 1a where the pulleys 15, 15 are not arranged.
1 is attached. Motor 11 of each pulley 15
The other end of the pulley 15 is rotatably supported by the ceiling panel 1 via the support 16 while the other end of the pulley 15 is rotatably supported near the corner of the ceiling panel 1 via the support 16. Power transmission cable 1 as a drive shaft
4, respectively. The power transmission cable 14 is
A flexible shaft having torsional rigidity but extremely low bending rigidity. Gear 1 is connected to the output shaft of the motor 11
2 and the gear 13 meshed with the gear 12
Is coaxially mounted substantially at the center of the power transmission cable 14. The rotation of the output shaft of the motor 11
3 and a pulley 15,
Tell 15

The suction grill 2 is suspended from one end of two wires 21 as hanging members via a mounting bracket 22, and the other end of the wire 21 is wound up / down by pulleys 15, 15, so that suction is performed. The grill 2 is moved up and down.

A limit switch 17 is provided on one side of the housing portion 1a of the ceiling panel 1 on the motor 11 side and on the opposite side.
17 are attached respectively. Limit switch detecting projections 18, 18 are attached to the suction grille 2 at positions facing the limit switches 17, 17, respectively. When the suction grill 2 is mounted on the storage portion 1a of the ceiling panel 1, the limit switch detecting projections 18, 18 turn on the limit switches 17, 17.

FIG. 2 is an exploded perspective view of the pulley 15 shown in FIG. The pulley 15 is a drum having a bottomed cylindrical portion 23a having one end closed, a disk portion 23b provided at one end of the cylindrical portion 23a, and a flange portion 23c provided at the other end of the cylindrical portion 23a. A connecting portion 24 having a portion 23, a cylindrical portion 24a one end of which is rotatably fitted into the hollow portion 27 of the cylindrical portion 23a of the drum portion 23, and a disk portion 24b covering the other end of the cylindrical portion 24a. And A guide rod 25, one end of which is fixed to the bottom of the cylindrical portion 23 a and disposed in the hollow portion 27, is provided in the cylindrical portion 23 a of the drum portion 23. One end of a coil spring 26 as a damper spring externally fitted to the guide rod 25 is fixed to the disk part 23b side in the drum part 23, and the other end of the coil spring 26 is fixed to the disk part 24b of the connecting part 24. hand,
A coil spring 26 is arranged between the inner peripheral surface of the cylindrical portion 23a and the outer peripheral surface of the guide rod 25. Then, the connecting portion 24
One end of the power transmission cable 14 is connected to the disk portion 24b of the power transmission cable 24, and the rotation of the power transmission cable 14 is transmitted to the drum portion 23 via the connection portion 24 and the coil spring 26.

In the air conditioner having the above structure, the motor 1
When the power transmission cable 14 rotates in the direction of arrow R as shown in FIG. 2, the wire 21 is wound by the pulley 15 while the power transmission cable 14 rotates in the direction opposite to the arrow R as shown in FIG. Lower 21. In this way, in FIG. 1, the wires 21, 21 are wound up / down, and the suction grill 2 is moved up and down. After lowering the storage section 1 a of the ceiling panel 1 and performing maintenance such as cleaning of the air filter 3 of the suction grill 2, the suction grill 2 is stored in the storage section 1 a of the ceiling panel 1. At this time, the hanging lengths of the wires 21, 21 are not uniform, and the suction grill 2 is
a, the side of the suction grille 2 suspended on the short side wire 21 reaches the storage portion 1a, and the pulley 1 for winding up the short side wire 21
The rotation of No. 5 stops. Then, the load torque of the stopped pulley 15 becomes a predetermined magnitude, the coil spring 26 built in the hollow portion 24 of the pulley 15 is elastically deformed and squeezed, and the coil spring 26 is gradually moved to the guide rod 25. It is strongly wound to absorb the difference in rotation between the pulley 15 and the power transmission cable 14. Then, while absorbing the rotation difference between the pulled-up pulley 15 and the power transmission cable 14, another wire 21 that has not been wound up is wound up, and the remaining portion of the suction grill 2 is stored in the storage section 1 a of the ceiling panel 1. To fit. In this way, when the suction grille 2 is accommodated, the displacement of the suspension length of the wires 21, 21 is adjusted by the coil spring 26 built in the hollow portion 24 of the pulley 15, and the suction grill 2 is moved to the ceiling by the spring force of the coil spring 26. Closely contact the storage section 1a of the panel 1.

As described above, there is no need to increase the motor torque unlike the case of using a torque limiter or the like having a large variation and a short life, and the suction grill 2 is securely stored in the predetermined storage portion 1a with a simple structure. Thus, a low-cost and highly reliable air conditioner that can be moved up and down can be realized. The torque of the motor 11 supports the pulley 15 and the power transmission cable 14 while supporting the load of the suction grill 2.
It is sufficient to make the torque larger than the torque at the time of absorbing the rotation difference with the coil spring 26.

The coil spring 26 is connected to the pulley 15
The lifting mechanism of the suction grille 2 can be reduced in size because it is built in the hollow portion 27 of FIG.

Further, as shown in FIG.
When the load torque of No. 5 becomes a predetermined magnitude and absorbs the rotation difference between the pulley 15 and the power transmission cable 14,
The coil spring 26 gradually and strongly winds on the guide rod 25 built in the pulley 15 and guides the coil spring 26 on the inner peripheral surface of the pulley 15 and the outer peripheral surface of the guide rod 25, so that the coil spring 26 may buckle. Thus, the coil spring 26 can function normally as a damper spring.

(Second Embodiment) FIG. 3 is a perspective view of a main part of an air conditioner according to a second embodiment of the present invention. Reference numeral 31 denotes a substantially square ceiling panel having a storage part 31a opening in a substantially square shape. , 32 are suction grills stored in the storage portion 31a of the ceiling panel 31, and 33 is an air filter removably attached to the suction grille 32. Nearly four sides of the ceiling panel are provided with substantially rectangular outlets 31b along the outer edge. A mounting bracket 52 is attached to one end of each of the four wires 51 as a suspending member of the suction grill 32.
Hanging through.

A reversely rotatable motor 41 is mounted at substantially the center of the opposite side of the storage section 31a of the ceiling panel 31. A gear 42 is fixed to an output shaft of the motor 41, and a shaft of a gear 43 meshing with the gear 42 is connected to a power transmission shaft 44. The rotation of the output shaft of the motor 41 is transmitted to pulleys 45 via gears 42 and 43 and a power transmission shaft 44. The pulleys 45 have the same configuration as the pulley 15 shown in FIG. The opposite side of each pulley 45 from the power transmission shaft 44 is rotatably supported by a support portion 46.

The storage section 31a of the ceiling panel 31
The limit switches 47 to 47 are attached near the corners of the pulleys and near the pulleys 45 to 45. Further, limit switch detecting projections 48 to 48 are attached to the suction grill 32 at positions facing the limit switches 47 to 47.

In the air conditioner having the above configuration, the motor 4
When the power transmission shaft 44 rotates in the hoisting direction, the wire 51 is wound up by the pulley 45 when the power transmission shaft 44 is rotated in the hoisting direction. In this way, the four wires 51 to 51 are wound up / down, and the suction grill 32 is moved up and down. Then, the suction grille 32 is connected to the ceiling panel 3.
In the case where the wires 51 to 51 are housed in the storage portion 31a, the suction grille 32 suspended by the wire 51 having the shorter hanging length has the storage portion 3 when the hanging lengths of the wires 51 to 51 are not uniform.
1a, the rotation of the pulley 45 for winding up the short side wire 51 stops. Then, the load torque of the pulley 45 becomes a predetermined magnitude, the coil spring 26 shown in FIG. 2 is elastically deformed and squeezed, and the rotational difference between the pulley 45 and the power transmission shaft 44 is absorbed. And
While absorbing the rotation difference between the pulled-up pulley 45 and the power transmission shaft 44, the other wire 51 that has not been wound is wound up, and the remaining portion of the suction grill 32 is stored in the storage portion 31a of the ceiling panel 31. . Thus, when the suction grille 32 is stored, the wires 51 to 5 are provided by the coil spring 26 (shown in FIG. 2) built in the pulley 45.
1 and the coil spring 26
The suction grille 32 is brought into close contact with the storage portion 31a of the ceiling panel 31 by the spring force of.

Therefore, the air conditioner has a simple structure, similar to the air conditioner of the first embodiment, and has a simple structure.
Thus, a low-cost and highly reliable air conditioner that can be moved up and down so as to securely accommodate the air conditioner 2 in the predetermined storage portion 31a can be realized.

In the first and second embodiments, the suction grilles 2, 32 are moved up and down. However, the ceiling panel to which the suction grille is attached may be moved up and down.

In the first and second embodiments, the coil spring 26 as a damper spring is built in the pulley 15, but the damper spring does not have to be built in the hollow portion of the pulley.

In the first and second embodiments, the coil spring 26 is used as the damper spring. However, the damper spring is not limited to this. The rotation of the motor is transmitted to the pulley, and the load torque of the pulley is large. At this time, any material may be used as long as it elastically deforms and absorbs the difference in rotation between the pulley and the motor. In the first and second embodiments,
Although the wires 21 and 51 are used as the suspending member, the suspending member may be a string or a band.

[0033]

As is clear from the above, in the air conditioner of the first aspect of the present invention, the suction member suspended by the suspension member is lifted and lowered by the pulley driven by the motor. in the air conditioner for raising and lowering the grill or ceiling panels, along with transmitting the rotational force of the motor to the pulley, the load torque of the pulley is equal to or greater than a predetermined magnitude, in the above-described pulley and motor sides
The damper spring whose both ends are fixed gradually deforms elastically,
The elastic deformation absorbs the rotation difference between the pulley and the motor.

Therefore, according to the air conditioner of the first aspect of the present invention, the suspension length of the suspension member for suspending the suction grill or the ceiling panel varies, and the suction grill or the ceiling panel is housed in the main body. If it is inclined with respect to the opening plane of the part, the side of the suction grille or the ceiling panel suspended by the suspension member with a shorter suspension length reaches the main body side first, and the rotation of the pulled-up pulley stops and , the load torque of the pulley is equal to or greater than a predetermined size, and the pulley side and da <br/> Npabane whose both ends are fixed to the motor side is gradually elastically deformed, by its elastic deformation
While absorbing the difference in rotation between the pulley and the motor, and absorbing the difference in rotation between the pulled-up pulley and the motor, another hanging member is wound up by the unrolled pulley, and the suction grille or ceiling panel The rest fits in the storage section on the main unit side. At this time, the suction grille or the ceiling panel comes into close contact with the housing portion on the main body side by the spring force of the damper spring. Therefore, there is no need to increase the motor torque as in the case where a torque limiter or the like is used, and a low-cost and highly reliable air that can be raised and lowered with a simple structure so that the suction grill or the ceiling panel can be securely housed in a predetermined place. A harmonic machine can be realized.

According to a second aspect of the present invention, in the air conditioner of the first aspect, since the damper spring is built in the pulley, the lifting mechanism of the suction grill or the ceiling panel is provided. The size can be reduced.

The air conditioner according to a third aspect of the present invention is the air conditioner according to the second aspect, further comprising a guide rod fixed to the pulley and disposed in the hollow portion. Since the coil spring is disposed between the inner peripheral surface of the pulley hollow portion and the outer peripheral surface of the guide rod, the load torque of the pulley becomes a predetermined magnitude, and the pulley and the motor In order to absorb the rotation difference of the coil spring, the coil spring is gradually wound strongly around the guide rod, and the coil spring is guided by the inner peripheral surface of the pulley and the outer peripheral surface of the guide rod. It can work normally as a spring.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a pulley of the air conditioner.

FIG. 3 is a perspective view of a main part of an air conditioner according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a conventional air conditioner.

FIG. 5 is a plan view of a main part of the air conditioner.

FIG. 6 is a sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

1 ... ceiling panel, 2 ... suction grille, 3 ... air filter,
11 ... Motor, 12, 13 ... Gear, 14 ... Power transmission cable, 15 ... Pulley, 16 ... Support, 17 ... Limit switch, 18 ... Limit switch detecting projection, 21 ...
Wires, 22 mounting brackets, 23 drum parts, 24 connecting parts, 25 guide rods, 26 coil springs.

Claims (3)

(57) [Claims] 1. A suction grill (2) or a ceiling panel is suspended by a suspension member (21), and the suspension member (21) is hoisted and lowered by a pulley (15) driven by a motor (11). Thereby, in the air conditioner which raises and lowers the suction grill (2) or the ceiling panel , both ends are connected to the pulley (15) side and the motor (11) side.
While being fixed, the torque of the motor (11) is transmitted to the pulley (15), and when the load torque of the pulley (15) becomes a predetermined value or more , it is gradually elastically deformed. An air conditioner comprising a damper spring for absorbing a rotation difference between the pulley (15) and the motor (11). 2. The air conditioner according to claim 1, wherein the damper spring comprises a hollow portion (2) of the pulley (15).
An air conditioner characterized by being built in 7). 3. The air conditioner according to claim 2, wherein said hollow portion is fixed to said pulley (15).
(27), the damper spring is a coil spring (26), and the inner peripheral surface of the hollow portion (27) of the pulley (15) and the guide rod
(25) The air conditioner, which is arranged between the air conditioner and the outer peripheral surface.