JPH11148672A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify control in an air conditioner designed to lift or lower a suction grill. SOLUTION: This air conditioning equipment is consisted of an air filter 16 installed on a suction grill 15, a motor 17 installed on a unit body 11, an output shaft linked to the motor 17, a driven shaft arranged being divided on the same axis with the output shaft, a clutch mechanism adapted to connect the output shaft to the driven shaft at the normal rotation of the motor 17 and separate the output shaft from the driven shaft at the opposite rotation of the motor 17, a plurality of wires 20 with one end thereof mounted on the suction grill 15, a pulley 21 to wind or unwind the wires 20 provided on the driven shaft and a damper which is linked to the driven shaft to reduce the rotation of the driven shaft at the opposite rotation of the driven shaft. This allows lowering of the suction grill 15 depending on falling by the dead load in stead of the rotation of the motor 17 to stop it naturally at the lowest point thereby simplifying the control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-ceiling type air conditioner capable of moving a suction grill up and down.

[0002]

2. Description of the Related Art In recent years, an air conditioner mounted on a ceiling has been used to raise and lower a ceiling panel or a suction grill on which an air filter is mounted in order to improve usability.

A conventional air conditioner of this type is disclosed in Japanese Utility Model Laid-Open No. 8-1023.

Hereinafter, the conventional air conditioner will be described with reference to the drawings. FIG. 8 is a sectional view of a conventional air conditioner, and FIG. 9 is a side view of a main part of the conventional air conditioner.

[0005] In the figure, reference numeral 1 denotes a unit main body which is installed in a ceiling and has a built-in heat exchanger 1a and a blower 1b, and a ceiling panel 2 and an air filter 3 are detachably mounted at a lower portion.

The unit body 1 has a DC that can be rotated forward and reverse.
A rotating drum 5 driven forward and reverse by a motor 4 is provided. The other end of a wire 6 having one end wound around the rotating drum 5 is connected to a guide roller 9 attached to the unit body 1.
And a worm 7 connected to the DC motor 4 and a worm meshing therewith.
The rotary drum 5 is driven to rotate via the gear 8.

The operation of the air conditioner configured as described above will be described below. First, when the DC motor 4 is rotated in the reverse direction, the rotating drum 5 is rotated in the reverse direction.
Descends horizontally.

When the DC motor 4 is stopped when it reaches an appropriate height on the floor, the ceiling panel 2 stops descending.

Therefore, an operator on the floor removes the air filter 3 from the ceiling panel 2 and cleans or replaces it with a new air filter. When the cleaning or replacement is completed, the air filter 3 is attached to the ceiling panel 2 again, and the rotating drum 5 is rotated forward by rotating the DC motor 4 in the forward direction, so that a plurality of wires 6 are simultaneously attached to the rotating drum 5. It is wound up. As a result, when the DC motor 4 is stopped when the ceiling panel 2 rises and reaches the lower surface of the unit body 1, the ceiling panel 2 stops.

[0010]

However, in the above-mentioned conventional construction, the ceiling panel 2 is lowered by the reversal of the DC motor 4, so that when the DC motor 4 is further reversed after reaching the lowermost point, the wire 6 is turned off. Since the ceiling panel 2 is lifted up again by the rotating drum 5, the D is required to be in front of the lowest point.
It is necessary to stop the C motor 4 and the control becomes complicated.

An object of the present invention is to solve the conventional problem and to provide an air conditioner capable of moving up and down a suction grill with simple control.

[0012]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention is to lower the suction grill at an appropriate speed by the load and damper of the suction grill and the filter, and to raise the suction grill by a motor. It was configured as follows.

Thus, the suction grill can be moved up and down with a simple control.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a unit body which is installed in a ceiling, has a built-in heat exchanger and a blower, and has a ceiling panel provided at a lower portion, and a suction grill which is detachably attached to a lower portion of the ceiling panel. An air filter installed on the suction grille, a motor installed on the unit body or the ceiling panel, an output shaft connected to the motor, and a coaxial line with the output shaft. A driven shaft, a clutch mechanism for connecting the output shaft and the driven shaft during the forward rotation of the motor, and disconnecting the output shaft and the driven shaft during the reverse rotation of the motor; one end of the suction grille; A plurality of wires attached to the driven shaft, a pulley provided on the driven shaft for winding and rewinding the wire, and a pulley connected to the driven shaft to reduce the rotation of the driven shaft when the driven shaft reversely rotates. Damper It is obtained by al configuration.

In the above configuration, when the motor is reversed, the output shaft and the driven shaft are separated by the clutch mechanism, the driven shaft is reversed by the load of the suction grill and the filter, the wire is rewound, and the suction grill descends.

At this time, since the rotation of the driven shaft is reduced by the damper, the suction grill is lowered slowly.

As described above, the descent is not the rotation of the motor but the fall of its own weight, and the suction grille stops naturally at the lowest point, so that the control can be simplified.

Next, when the motor is rotated forward, the output shaft and the driven shaft are connected by the clutch mechanism.
Take up the wire by the reel, raise the suction grill,
It can be stored in the unit body.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the air conditioner according to the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an air conditioner according to an embodiment of the present invention, FIG. 2 is a front view of a main part of a lifting device used in the embodiment viewed from a direction A in FIG. 1, and FIG. FIG. 4 is a bottom view of the elevating device when the motor is rotated forward when viewed from the direction B in FIG. 2. FIG. 4 is a direction B in FIG. 2 of the elevating device when the motor is rotated reversely. 5, FIG. 5 is an enlarged view of a main part of the lifting device, FIG. 6 is a cross-sectional view taken along line CC of FIG. 5, FIG.
FIG. 3 is an enlarged view of a main part of a pulley of the lifting device.

In FIG. 1, reference numeral 11 denotes a unit main body, which is installed in a ceiling, has a built-in heat exchanger 12 and a blower 13, and has a rectangular ceiling panel 14 at a lower portion. 1
Reference numeral 5 denotes a rectangular suction grille detachably attached to a lower portion of the ceiling panel 14, and reference numeral 16 denotes an air filter installed on the suction grille 15.

Reference numeral 17 denotes a motor such as a DC motor.
Is installed on the unit main body 11 via a base 31 shown in FIG. The base 31 is the suction grill 1 in the unit body 11.
5 is installed close to a location facing one side. The motor 17 controls forward rotation, reverse rotation, and stop of the motor 17 by an up button, a down button, and a stop button of a wired remote controller (not shown).

In this embodiment, the base 31 of the lifting device is installed on the unit body 11 side, but it may be installed on the ceiling panel 14. Further, a spacer having a predetermined air passage formed between the unit body 11 and the ceiling panel 14 is provided,
The base 31 of the lifting device may be installed on the spacer.

2 to 5, reference numeral 18 denotes a motor 17;
The output shaft 18 is connected to the rotation shaft of the motor. In the present embodiment, the output shaft 18 is directly connected to the rotation shaft of the motor 17, but in order to adjust the rotation speed or torque of the output shaft 18, a reduction gear may be provided on the way or the motor may be adjusted. It is desirable to use a worm and a worm gear so that the output shaft 18 does not rotate when the 17 is stopped.

Reference numeral 19 denotes a driven shaft which is provided on the same axis as the output shaft 18, and is a pulley for winding and rewinding four wires 20 having one ends attached to the four corners of the suction grill 15. It has four -21s. In addition, 4
The wires 20 of the two pulleys 21 at both ends of the one pulley 21 are connected to the corners of the suction grill 15 on the side of the non-driven shaft 19 via guide rollers 34 attached to the unit body 11.

The center 2 of the four pulleys 21
The four pulleys 21 are arranged such that the wires 20 hanging down from the two pulleys 21 toward the suction grille 15 and the wires 20 hanging down from the two guide rollers 34 toward the suction grille 15 extend substantially vertically. The positions of the two guide rollers 34 are determined.

As shown in FIG. 7, the pulley 21 is wound in the same direction as the right-hand thread so that the inner diameter is substantially the same as the outer diameter of the driven shaft 19, wound around the driven shaft 19, and A limiter spring 32 having one end on the 17 side extending in the radial direction, a groove for holding one end of the limiter spring 32 extending in the radial direction, and a wound portion of the limiter spring 32 are housed between the driven shaft 19. Space 21a
And a cap 33 for closing an opening for inserting the limiter spring 32 into the space 21a from the side opposite to the motor 17 and fixing one end of the limiter spring 32 extending in the radial direction to the pulley -21. -Ri-21 is not fixed to the driven shaft 19.

If the pulley 21 is rotated counterclockwise when viewed from the cap 33 while the driven shaft 19 is not rotating, the limiter spring 32 is contracted, and the connection with the driven shaft 19 is reduced. The pulley 21 is prevented from running idle unless it becomes strong and a torque greater than a predetermined value is applied. This predetermined value is controlled by the rotation of the motor,
Is smaller than the rotational force applied to the pulley 21 when the wire 20 is pulled by the load of the suction grill 15 and the filter 16.

When the wire 20 is rewound (when the suction grill 15 is lowered), the pulley 21 rotates counterclockwise as viewed from the cap 33 side, and when the wire 20 is wound (the suction grill). 15), the pulley 21 rotates clockwise as viewed from the cap 33 side.

2 to 5, reference numeral 22 denotes a clutch mechanism which outputs when the motor 17 rotates forward (when the output shaft 18 rotates clockwise when the output shaft 18 is viewed from the driven shaft 19 side). The shaft 18 and the driven shaft 19 are connected, and when the motor 17 rotates in the reverse direction (when the output shaft 18 rotates counterclockwise when the output shaft 18 is viewed from the driven shaft 19 side), the output shaft 18 and the driven shaft 19 are separated. .

Reference numeral 23 denotes a substantially cylindrical guide, which is rotatably mounted at the end of the output shaft 18 facing the driven shaft 19, using the output shaft 18 as a rotation axis. Reference numeral 23a denotes a substantially spiral shaped guide groove provided in a substantially central part of the side surface of the guide 23 over substantially a half circumference in the same direction as the right-hand thread, and has a predetermined angle with respect to the center axis of the guide 23. 23b is guide 2
3 is a small-diameter portion provided at one end and having a smaller outer diameter. A notch 23c is a substantially right triangular shape provided at a predetermined width at the other end of the guide 23, and is widened toward the end. And a cut surface having a predetermined angle opposite to the screw. Note that the output shaft 18 is in a state where the end facing the driven shaft 19 is inserted from the small-diameter portion 23 b side to the middle of the guide 23.

A pin 24 is fixed to a portion of the output shaft 18 exposed from the guide groove 23a of the guide 23,
It protrudes in the radial direction of the output shaft 18 and is inserted into the guide groove 23a.

The pin 24 is connected to the guide groove 2 of the guide 23.
When the guide 3a moves from the end on the side of the notch 23c to the end on the side of the small-diameter portion 23b, the guide 23 moves in the direction of the driven shaft 19 over a distance larger than the depth dimension of the notch 23c.

Reference numeral 25 denotes a spring wound in the same direction as the right-hand thread and inserted into the small-diameter portion 23b. One end 25a of the guide 23 extends in the radial direction of the guide 23. When the spring 25 pushes the end portion 25a extending in the radial direction in the direction in which the spring 25 loosens,
The spring 25 rotates with a small force about the guide 23 as a rotation axis. However, when the radially extending end of the guide 23 is pushed in the direction in which the spring 25 is contracted, the spring 25 25 is set in advance so as not to rotate with the guide 23 as a rotation axis. This predetermined value is smaller than the rotation force applied to the output shaft 18 by the rotation of the motor.

Reference numeral 26 denotes a stopper, and a spring 25 inserted into the small diameter portion 23b moves the guide 23 from the small diameter portion 23b.
Is fixed to the end of the small diameter portion 23b so as not to come off to one end.

Reference numeral 27 denotes a spring guide, and the output shaft 1
8 has an L-shaped cross section when cut along a plane perpendicular to FIG.
End) of the spring 25 extending in the radial direction.
Are mounted on the base 31 so as to sandwich the spring 25, and abut on the radially extending end 25a of the spring 25 to restrict the rotation of the spring 25.

Reference numeral 28 denotes a pin, which is fixed near the end of the driven shaft 19 facing the output shaft 18, protrudes in the radial direction of the driven shaft 19, and moves when the guide 23 moves in the driven shaft 19 direction. With the notch 23c.

Numeral 29 denotes a damper which requires a large rotational force only when it is rotated in one direction, is connected to the driven shaft 19, and when the driven shaft 19 rotates in the reverse direction, that is, the suction grill 15
When the pulley 21 rotates counterclockwise when viewed from the cap 33 side, the rotation of the driven shaft 19 is reduced. As the damper 29, for example, an oil damper or the like can be used. Further, it is preferable that the load torque can be adjusted. Reference numeral 30 denotes a bearing that rotatably holds the driven shaft, and is attached to the base 31.

The guide 23 can move in the axial direction with respect to the output shaft 18, and the rotation of the output shaft 18 causes the pin 24 inserted in the guide groove 23a of the guide 23 to rotate, and moves along the guide groove 23a. Try to rotate. On the other hand, the guide groove 2
3a has a substantially spiral shape having a predetermined angle with respect to the center axis of the output shaft 18, and when the pin 24 tries to rotate along the guide groove 23a, the guide 23 is dragged by the pin 24, and It moves in the direction of the shaft 18 or the driven shaft 19.
When the guide 23 moves toward the output shaft 18, the notch 23 c of the guide 23 and the pin 28 fixed to the driven shaft 19 are separated, and the connection between the output shaft 18 and the driven shaft 19 is released. When the guide 23 is moved toward the driven shaft 19 from the state where the connection between the output shaft 18 and the driven shaft 19 is released, the notch 23 a of the guide 23 and the pin 2 fixed to the driven shaft 19 are moved.
8 are engaged again, and the output shaft 18 and the driven shaft 19 are connected.

The operation of the air conditioner configured as described above will be described below. First, when the suction grille 15 is housed in the ceiling panel 14, the notch 23 c of the guide 23 engages with the pin 28 fixed to the driven shaft 19, and the pin 24 of the output shaft 18 engages with the guide groove of the guide 23. 2
3a is located at the end on the small-diameter portion 23b side.

In this state, when the motor 17 is rotated in reverse by operating the down button of the remote controller, the output shaft 18 connected to the rotating shaft of the motor 17 rotates in the reverse direction (the output shaft 18 is moved from the driven shaft 19 side). When viewed, the output shaft 18 rotates counterclockwise, and the pins 24 of the output shaft 18 contact the inclined wall surface of the guide groove 23a of the guide 23 to try to reverse the guide 23. The reverse rotation of the guide 23 is prevented by the operation of the guide 27, and the pin 24 of the output shaft 18 is
Moves in the guide groove 23a of the guide 23.

At this time, the guide 23 is moved to the output shaft 18 side by the axial component of the force received by the pin 24 of the output shaft 18 on the inclined wall surface of the guide groove 23a of the guide 23.
(17).

The output shaft 18 side of the guide 23 (motor 17
When the notch 23c of the guide 23 is disengaged from the pin 28 fixed to the driven shaft 19 by the movement to the side (2), the connection between the output shaft 18 and the driven shaft 19 is released, and the suction grill 1
5 and the wire of the pulley-21 by the load of the filter 16
0 is pulled, and the pulley 21 is viewed from the cap 33 side.
Rotates counterclockwise, the driven shaft 19 reverses, and the pulley
The wire 20 wound around 21 is rewound, and the suction grill 15 descends.

At this time, the driven shaft 19 is
, The suction grill 15 descends slowly. Thus, the descent is not the rotation of the motor 17,
Due to its own weight, the suction grill 15 stops naturally at the lowest point.

The pin 24 of the output shaft 18 is
After reaching the notch 23c side end of the guide groove 23a,
The force by which the pin 24 of the output shaft 18 tries to reverse the guide 23 exceeds the force by which the spring 25 and the spring guide 27 try to prevent the guide 23 from reversing, and the guide 23 also reverses.

After the motor 17 is rotated in reverse by operating the down button of the remote controller, it is necessary to release the engagement between the notch 23c of the guide 23 and the pin 28 fixed to the driven shaft 19 for a predetermined time. After the elapse of an appropriate time, the motor 17 is automatically stopped.

When the suction grill 15 is stopped before descending to the lowest point, when the suction grill 15 is lowered to just before a desired position, the motor 17 is operated by operating the up button of the remote controller. Turn forward.

When the motor 17 is rotated forward, the output shaft 18 connected to the rotation shaft of the motor 17 rotates forward (when the output shaft 18 is viewed from the driven shaft 19 side, the output shaft 18 rotates clockwise). rotation)
The pin 24 of the output shaft 18 is connected to the guide groove 23a of the guide 23.
The guide 23 is rotated in the forward direction by contacting the inclined wall surface, but the forward rotation of the guide 23 is prevented by the action of the spring 25 and the spring guide 27, and the pin 24 of the output shaft 18 is moved to the guide groove 23a of the guide 23. Try to move around.

At this time, the guide 23 moves to the driven shaft 19 side by the axial component of the force received by the pin 24 of the output shaft 18 on the inclined wall surface of the guide groove 23 a of the guide 23, and the output shaft 18 The pin 24 is the guide groove 23a of the guide 23
Of the guide 23, the pin 28 fixed to the driven shaft 19 engages with the notch 23c of the guide 23 when moving from the end on the side of the notch 23c to the end on the side of the small diameter portion 23b (or just before the end on the side of the small diameter portion 23b). , Driven shaft 19 is driven by guide 23 to output shaft 1
8 is connected.

When there is no pin 28 of the driven shaft 19 when the notch 23c of the guide 23 is moved to the driven shaft 19 side, the end of the guide 23 and the pin 28 of the driven shaft 19 are not provided.
After the guide 23 cannot move toward the driven shaft 19 due to the contact with the guide shaft 23, the guide 23 rotates and the pin 28 of the driven shaft 19 rotates, so that the notch 2
When the inclined wall surface of 3c comes to a position facing the pin 28 of the driven shaft 19, the guide 23 moves to the driven shaft 19 side and engages.

The driven shaft 19 is connected to the output shaft 18 by the guide 23.
Since the output shaft 18 is rotated forward after the connection, the lowered suction grill 15 starts to rise, but at this time (when the desired position is reached), the stop button of the remote controller is operated by operating the stop button. By stopping the rotation of the motor 17, the suction grill 15 can be stopped at a desired position.

Next, the suction grill 15 descends to the lowest point and stops naturally (the suction grill 15
And the pin 24 of the output shaft 18 is at the end of the guide groove 23a of the guide 23 on the cutout 23c side, and the pin 2 of the driven shaft 19 is driven by the cutout 23c of the guide 23.
When the motor 17 is rotated forward by operating the up button of the remote controller in a state where the motor 8 is not engaged, the output shaft 18 connected to the rotating shaft of the motor 17 rotates forward (the driven shaft 19). When the output shaft 18 is viewed from the side, the output shaft 18 rotates clockwise)
The pin 24 of the output shaft 18 comes into contact with the inclined wall surface of the guide groove 23a of the guide 23 to try to rotate the guide 23 forward, but the forward rotation of the guide 23 is prevented by the action of the spring 25 and the spring guide 27, Pin 24 of output shaft 18
Moves in the guide groove 23 a of the guide 23.

At this time, the guide 23 moves to the driven shaft 19 side by the axial component of the force received by the pin 24 of the output shaft 18 on the inclined wall surface of the guide groove 23 a of the guide 23, and The pin 24 is the guide groove 23a of the guide 23
Of the guide 23, the pin 28 fixed to the driven shaft 19 engages with the notch 23c of the guide 23 when moving from the end on the side of the notch 23c to the end on the side of the small diameter portion 23b (or just before the end on the side of the small diameter portion 23b). , Driven shaft 19 is driven by guide 23 to output shaft 1
8 is connected.

The pin 24 of the output shaft 18 is
After reaching the end of the guide groove 23a on the small-diameter portion 23b side, the notch 23c of the guide 23 engages with the pin 28 fixed to the driven shaft 19, and the driven shaft 19 is connected to the output shaft 18 by the guide 23. After that, the force of the pin 24 of the output shaft 18 for rotating the guide 23 in the forward direction exceeds the force of the spring 25 and the spring guide 27 for preventing the guide 23 from rotating in the forward direction. I do.

The force for preventing the guide 23 from rotating forward by the spring 25 and the spring guide 27 is as follows.
Guide 2 by spring 25 and spring guide 27
3 is less than the force trying to prevent reversal.

When the pin 28 of the driven shaft 19 is not provided at the position of the notch 23 c of the guide 23 moving toward the driven shaft 19, the end of the guide 23 and the pin 28 of the driven shaft 19 are not provided.
After the guide 23 cannot move toward the driven shaft 19 due to the contact with the guide shaft 23, the guide 23 rotates and the pin 28 of the driven shaft 19 rotates, so that the notch 2
When the inclined wall surface of 3c comes to a position facing the pin 28 of the driven shaft 19, the guide 23 moves to the driven shaft 19 side and engages.

As a result, the guide 23 and the driven shaft 19 are also rotated forward, the wire 20 is wound by the pulley 21 provided on the driven shaft 19, the suction grill 15 is raised, and the suction grill 15 is placed on the ceiling panel 14. it can.

When the suction grille 15 is stopped before reaching the lowest point by operating the remote controller, since the driven shaft 19 is already connected to the output shaft 18 by the guide 23, the raising button of the remote controller must be operated. When the motor 17 is rotated forward by operating the guide 23 and the driven shaft 19, the wire 20 is wound by the pulley 21 provided on the driven shaft 19, and the suction grill 15 is raised. It can be accommodated in the ceiling panel 14.

A limit switch (not shown) which operates when the suction grill 15 is properly fitted to the ceiling panel 14 is provided on the ceiling panel 14, and when the limit switch is operated, the motor 17 is driven after a predetermined time has elapsed. To stop automatically.

If there is a variation in the winding of the four wires 20, the pulling up of the wire 20 first
Re-21 idles.

As described above, the air conditioner of the present embodiment is provided with a heat exchanger 12 and a blower 13 installed inside a ceiling, and a unit main body 11 provided with a ceiling panel 14 at a lower portion, and a unit body 11 at a lower portion of the ceiling panel 14. Suction grill 15 detachably mounted, and air filter 1 installed on suction grill 15
6, a motor 17 installed on the unit body 11, an output shaft 18 connected to the motor 17, a driven shaft 19 provided on the same axis as the output shaft 18, and a motor. TA 17
During forward rotation, the output shaft 18 and the driven shaft 19 are connected, and the motor 17
A clutch mechanism 22 for separating the output shaft 18 from the driven shaft 19 during reverse rotation, a plurality of wires 20 having one end attached to the suction grille 15, and a pulley provided on the driven shaft 19 for winding and rewinding the wires 20. 21 and a damper 29 which is connected to the driven shaft 19 and reduces the rotation of the driven shaft 19 when the driven shaft 19 rotates in the reverse direction, so that the suction grill 15 can be lowered not by the rotation of the motor 17 but by its own weight. Because it can be stopped at the lowest point naturally to descend,
Control is easy.

[0062]

As described above, the present invention is directed to a unit main body having a heat exchanger and a blower built therein and a ceiling panel provided at a lower portion, and a suction unit detachably mounted at a lower portion of the ceiling panel. A grill, an air filter installed on the suction grille, a motor installed on the unit body or the ceiling panel, an output shaft connected to the motor, and divided on the same axis as the output shaft. A driven shaft, a clutch mechanism for connecting the output shaft and the driven shaft during the forward rotation of the motor, and disconnecting the output shaft and the driven shaft during the reverse rotation of the motor; one end of the suction grille; A plurality of wires attached to the driven shaft, a pulley provided on the driven shaft for winding and rewinding the wire, and a pulley connected to the driven shaft to reduce the rotation of the driven shaft when the driven shaft reversely rotates. Damper By the al construction, a drop in suction grille rather than the rotation of the motor, for lowering by its own weight fall, because it naturally stopped at the lowest point, the control can be simplified.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a front view of a main part of the lifting device used in the embodiment when viewed from a direction A in FIG. 1;

FIG. 3 is a bottom view of the ascent / descent device as viewed from a direction B in FIG. 2 when the motor is rotated forward;

FIG. 4 is a bottom view of the same elevating device as viewed from the direction B in FIG. 2 when the motor is reversed.

FIG. 5 is an enlarged view of a main part of the lifting device.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is an enlarged view of a main part of a pulley of the lifting device.

FIG. 8 is a cross-sectional view of a conventional air conditioner.

FIG. 9 is a side view of a main part of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Unit main body 12 Heat exchanger 13 Blower 14 Ceiling panel 15 Suction grill 16 Filter 17 Motor 18 Output shaft 19 Follower shaft 20 Wire 21 Pulley 22 Clutch mechanism 29 Damper

Claims (1)

[Claims] 1. A unit body which is installed in a ceiling and has a built-in heat exchanger and a blower and a ceiling panel provided at a lower portion, a suction grille detachably mounted at a lower portion of the ceiling panel, and An installed air filter, and a motor installed on the unit body or the ceiling panel.
A motor, an output shaft connected to the motor, a driven shaft divided on the same axis as the output shaft, and connecting the output shaft and the driven shaft during the forward rotation of the motor; A clutch mechanism for separating the output shaft and the driven shaft during the reverse rotation of the motor, a plurality of wires each having one end attached to the suction grille, and a pusher provided on the driven shaft for winding and rewinding the wires; An air conditioner comprising: a lead; and a damper connected to the driven shaft and reducing the rotation of the driven shaft when the driven shaft reversely rotates.