JP3895882B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a suction grill mounting structure for an air conditioner having a unit body installed on a ceiling.
[0002]
[Prior art]
2. Description of the Related Art A ceiling-embedded air conditioner in which a suction grill is provided on a decorative panel attached to a ceiling opening and a filter is provided on the suction grill is known. The performance of the air conditioner is fully exhibited by removing and cleaning the filter provided on the suction grill.
[0003]
In order to lower the suction grill housed in the decorative panel from the ceiling to the work place, a ceiling-embedded air conditioner provided with a lifting device for raising and lowering the suction grill on the decorative panel has been proposed. In this lifting device, the other end of a hanging strap attached to the suction grill is wound around a drum that rotates forward and backward by driving a lifting motor provided on the decorative panel, and the suction grill is raised and lowered by the rotation of the drum. It is what I did.
[0004]
[Problems to be solved by the invention]
However, in an air conditioner having such a structure, if an electrical wiring or component breaks down while the suction grille is in close contact with the decorative panel, the lifting and lowering device of the suction grille will not move, making inspection and repair work troublesome. appear.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an air conditioner in which the above-described problems are solved and the suction grille can be easily removed from the decorative panel.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a suction grill supported on a decorative panel so as to be movable up and down, four suspension strings for suspending the suction grill so as to be movable up and down, a shaft rotated forward and backward by a motor, A drum attached to the shaft and wound around the suspension string, and an air conditioner configured to raise and lower the suction grill by the rotation of the drum accompanying the rotation of the shaft, the two sides facing the suction grill Provided with a guide for passing the hanging strap respectively, and a tip fitting for attaching the leading end of each hanging strap to the leading ends of the hanging straps inserted through the respective hanging straps, and the tip fittings. characterized in that as well as detachably connected via a central bracket for coupling is provided a clutch for transmitting or release the rotational force of the shaft in at least one of the drum
[0007]
If the suction grill elevating device breaks down while the suction grille is in close contact with the decorative panel, pulling down a part of the suction grille on the clutch-equipped drum side causes the clutch-equipped drum to idle with respect to the shaft, and the hanging string is fed out. There is a gap between the suction grille and the decorative panel. The suction grille can be removed from the decorative panel by disconnecting the ends of the hanging straps from this gap.
[0008]
Of the two sets of hanging straps inserted through the guide and connected, the total length of the hanging straps wound on the drum side with the clutch is the total length of the hanging straps wound on the other drum side. Shorter than that. As a result, when the suction grill is raised, the drum with the clutch always completes the winding of the suspension string first, the drum is stopped by the action of the clutch, the other drums continue to rotate, and the suction grill becomes the decorative panel. Fully stowed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a longitudinal sectional view of a general ceiling-embedded air conditioner. In FIG. 1, reference numeral 1 denotes a ceiling-embedded air conditioner 1. This ceiling-embedded air conditioner 1 has a sheet metal unit main body 2 housed inside the ceiling, a suction port 3 in the center, and blowout ports 4 on the four sides of the outer peripheral portion so as to block the ceiling hole 5. A decorative panel 7 provided on the ceiling surface 6 and a suction grill 8 having a suction port 3 in the center are constituted.
[0011]
11 is a blower comprising a turbo fan 12 and a fan motor 14 attached to the top plate 13, 15 is a nozzle port for guiding indoor air from the suction port 3 to the turbo fan 12, and 16 is an inner rising portion 17 and an outer rising portion. 18 is a plate fin type heat exchanger that is arranged in an annular shape so as to surround the fan on the discharge side of the turbo fan 12. Reference numeral 22 denotes a heat insulating material wound around the peripheral surface of the unit main body, reference numeral 23 denotes a wind guide portion for guiding the air heat-exchanged by the heat exchanger to the blowout port 4, and reference numeral 24 denotes a ceiling beam for the unit main body 2 with a suspension. A suspension bolt 25 for suspending on the suction grill 8 is a filter attached to the downstream side of the suction grill 8.
[0012]
Next, the main part of the present embodiment will be described with reference to FIGS. 2 to 4. In FIG. 2, panel guides 26 and 27 are respectively provided on two opposing sides on the inside of the decorative panel 7 provided on the ceiling surface 6. And 28, 29 are attached. Hanging straps 35, 36, 37, and 38 are respectively hung on these panel guides and guides (hereinafter referred to as grill pulleys) 31, 32, 33, and 34 provided on two sides of the suction grill 8. , 36, 37, and 38, the suction grill 8 is supported by the decorative panel 7. For these four hanging straps 35, 36, 37, 38, a resin wire or a metal wire with a vinyl coating on the outer periphery is used. Reference numeral 39 denotes a receiving unit 39 that receives a signal transmitted from a wireless remote controller (not shown) that operates the ceiling-mounted air conditioner 1.
[0013]
In FIG. 3, the shaft 40 has a first drum 41 fixed to the shaft 40, a second drum 42, a third drum 43, a fourth drum 44 rotatably attached to the shaft 40, and a fixed fixed to the shaft 40. A portion 45 is provided. Two pairs of the first drum 41 and the second drum 42 and the third drum 43 and the fourth drum 44 as a pair are provided on both sides of the shaft 40. A clutch 48 including a coil spring 46 and a clutch plate 47 is interposed between the fixed portion 45 and the fourth drum 44. The clutch 48 presses the clutch plate 47 against the side surface of the fourth drum 44 by the spring force of the coil spring 46, and the rotational force of the shaft 40 is generated by the frictional force between the clutch plate 47 and the side surface of the fourth drum 44. To communicate. The ends of the suspension straps 35, 36, 37, and 38 are fixed to the drums 41, 42, 43, and 44, respectively, and the suspension straps 35, 36, 37, and 38 are fed out or wound up as the shaft 40 rotates. Reference numeral 51 denotes an upper limit position detection sensor, and reference numeral 52 denotes a lower limit position detection sensor, which detects that the suction grille 8 has reached the upper limit position and the lower limit position, respectively. Specifically, the upper limit position detection sensor 51 is configured by a limit switch that is turned on when the suction grill 8 abuts, and the lower limit position detection sensor 52 is a hanging strap 35 wound around the drums 41, 42, 43, 44, It is detected by the number of turns (height) of 36, 37, and 38. The upper limit position may be detected by increasing the current value of the lifting motor 53.
[0014]
A drive system 56 including a lifting motor 53, gears 54 and 55, a shaft 40, a clutch 46, and the like for raising and lowering the suction grille 8 is gathered on a support plate 58 extending into an opening 57 of the unit body 2. Has been placed.
[0015]
In FIG. 4, grill pulleys 31, 32 and 33, 34 are attached to the suction grill 8 on two opposite sides, respectively. Reference numerals 61, 62, 63, and 64 are front end fittings attached to the end of each hanging strap. The front end fittings 61, 62, 63, and 64 have an elongated cylindrical portion and a diameter slightly larger than that of the cylindrical portion at the center of the cylindrical portion. A hanging string is connected to the bottom surface with a large cylindrical portion having a large and narrow width. Reference numerals 65 and 66 denote central metal fittings. The central metal fittings 65 and 66 each include a central portion of an elongated flat plate, a vertical piece that rises perpendicularly from both ends of the central portion, and a nail that is bent at the tip of the vertical piece inward. It is of the shape provided. A round hole is provided in the center of each vertical piece, and a slit is formed from the top of the round hole to the tip of the nail. The suspension straps are connected to each other by inserting the suspension strap side cylindrical portions of the front end fittings 61, 62, 63, 64 into the rear round holes through the slits at both ends of the central fittings 65, 66, respectively. is there. The hanging straps 35 and 36 having one ends fixed to the first drum 41 and the second drum 42 are respectively wound around the grill pulleys 31 and 32 through the panel guides 26 and 27. Tip fittings 61 and 62 are attached to the other ends of the hanging straps 35 and 36, and the tip fittings 61 and 62 are attached to the central fitting 65. The suspension straps 37 and 38 having one ends fixed to the third drum 43 and the fourth drum 44 are respectively passed through the panel guides 28 and 29 and passed to the grill pulleys 33 and 34, and the other ends are respectively attached to the central metal fitting 66. . The total length of the hanging straps 37 and 38 attached to the third drum 43 and the fourth drum 44 is based on the total length of the hanging straps 35 and 36 attached to the first drum 41 and the second drum 42. Is about 10 to 15 mm shorter. In this manner, the suction grill 8 can be moved up and down by hanging the hanging straps 35, 36, 37, 38 over the panel guides 26, 27, 28, 29, the grill pulleys 31, 32, 33, 34, and the central metal fittings 65, 66. Hanging on. The suction grill 8 is lowered by rotating the drums 41, 42, 43, 44 together with the shaft 40 in the direction in which the hanging straps 35, 36, 37, 38 are fed out. The suction grill 8 descending downward is lifted by rotating the drums 41, 42, 43, 44 together with the shaft 40 in the direction of winding the suspension straps 35, 36, 37, 38. In addition, a slight resistance is provided between each grill pulley and each hanging strap so that the suction grill 8 does not inadvertently tilt.
[0016]
As long as the weight of the suction grille 8 is applied to the hanging straps 37 and 38, the clutch 48 of the fourth drum 44 does not idle, but if an excessive load is applied to the hanging straps 37 and 38, the friction force of the clutch 48 is resisted. The drum 44 stops, the shaft 40 idles around the inner peripheral wall thereof, and the drums 41, 42, 43 rotate. In this way, even if the fourth drum 44 with the clutch 48 stops, the operation continues until the other side of the suction grill 8 is brought into close contact, so that the drum rotates when a portion of the suction grill 8 is closed. The suction grille 8 is always in close contact with the decorative panel 7 and never closes. Even if there is a difference in the arrival time to the decorative panel 7 in each part around the suction grill 8, it is eliminated and closed.
[0017]
Next, the operation of the embodiment will be described.
[0018]
For example, a button for “up”, “stop”, and “down” of the suction grill 8 is provided on the wireless remote controller, and this button is pressed according to the purpose. When a switch or button on the wireless remote control is operated, a signal is transmitted from the wireless remote control. This signal is received by the receiving unit 39, and the ceiling-embedded air conditioner 1 is controlled according to the signal. When the lowering button is pressed, the raising / lowering motor 53 rotates forward, the drive system 56 is driven, the hanging straps 35, 36, 37, 38 are drawn out, and the suction grill 8 starts to descend. Next, when the stop button is pressed, the elevating motor 53 stops and the suction grille 8 stops descending. When the ascending button is pressed further, the elevating motor 53 rotates in reverse, and the suction grille 8 Turn up.
[0019]
After the suction grille 8 starts to rise, when the suction grille 8 reaches the upper limit position, the upper limit position detection sensor 51 is activated, and at the same time, the timer is activated, and a predetermined time (for example, 0.3 to 2 seconds) has elapsed. Later, the reverse rotation of the elevating motor 53 is stopped, and the raising of the suction grille 8 is stopped.
[0020]
When the suction grill 8 is lowered to the lowest position, the suction grill 8 is suspended in a tilted state because the total length of the hanging straps 35, 36 is longer than the total length of 37, 38. If the suction grill 8 is raised without correcting the tilted state, a part of the suction grill 8 on the third drum 43 and fourth drum 44 side first reaches the decorative panel 7. Thereafter, when the drum continues to rotate, the central metal fitting 66 connecting the hanging straps 37, 38 moves slightly between the grill pulleys 33, 34, and the side of the suction grill 8 on the third drum 43, fourth drum 44 side. Comes into contact with the decorative panel 7. Since the rotational force of the shaft 40 is larger than the frictional force of the clutch 48 even if the sides of the suction grill 8 on the third drum 43 and the fourth drum 44 abut against the decorative panel 7, the three drums 41, 42, 43 are both Although the rotation continues, the fourth drum 44 stops, and a part of the hanging strap 37 connected to the hanging strap 38 of the fourth drum 44 is wound around the third drum 43. In such a process, the first drum 41 and the second drum 42 side of the suction grill 8 abut against the decorative panel 7, and when the drums 41, 42, and 43 continue to be wound, the hanging straps 37 and 38 are attached to the central metal fitting 66. While moving, the suction grill 8 is raised and its entire side is brought into close contact with the decorative panel 7. When the four sides of the suction grill 8 are in close contact with the decorative panel 7 in this manner, the drive of the lifting motor 53 is stopped and the rotation of the drums 41, 42, 43 is stopped. As described above, the central metal fitting 66 of the hanging strap 37 and the hanging strap 38 moves slightly toward the grill pulley 33 because the fourth drum 44 has been stopped, but the movement is slight and abuts against the grill pulley 33. There is no.
[0021]
Even if the suction grille 8 is lifted and lifted while the suction grille 8 is tilted, the reverse rotation of the elevating motor 53 is stopped after a predetermined time has elapsed since the upper limit position detection sensor 51 is activated. In this way, all the hanging strings are wound up, and the suction grill 8 is brought into close contact with the decorative panel 7.
[0022]
In the process of lowering the suction grille 8, the suction grille 8 is lowered by pressing the lowering button. When the stop button is pressed, the suction grille 8 stops lowering, and the suction grille 8 can be temporarily stopped at an arbitrary position. is there.
[0023]
Next, how to remove the suction grill 8 when the lifting device of the suction grill 8 breaks down while the suction grill 8 is in close contact with the decorative panel 7 will be described.
[0024]
Since the elevating device of the suction grille 8 and the electrical wiring and parts are above the suction grille 8 and the decorative panel 7, it is necessary to remove the suction grille 8 from the decorative panel 7 when it breaks down. In this case, first, a gap between one side of the suction grill 8 on the third drum 43 and the fourth drum 44 side and the decorative panel 7 in contact with this side (since the suction grill 8 is in close contact with the decorative panel 7, 4), the fourth drum 44 is idled and the suction grill 8 is slightly opened. When a force is applied to the gap and a further force is applied, one side of the suction grill 8 is greatly lowered and inclined to spread, and the central metal fitting 66 is exposed inside the suction grill 8. Next, by removing the end fittings 63 and 64 of the hanging straps 37 and 38 that are hooked on the central fitting 66, the hanging straps 37 and 38 are detached, and one side of the suction grill 8 hangs down. In this way, the central metal fitting 65 attached to the inside of the other side of the suction grille 8 appears, so that by removing the end fittings 61 and 62 of the hanging straps 35 and 36 hooked on the central metal fitting 65, the hanging strap 35 is removed. 36 and the suction grill 8 can be removed from the decorative panel 7. In this way, the suction grill 8 can be removed and necessary repairs can be made even in the event of a failure. If the rotating shafts of the respective grill pulleys 31, 32, 33, 34 are cantilevered, the hanging straps 35, 36, 37, 38 can be inserted / removed from the side of the grill pulleys 31, 32, 33, 34, When the hanging straps 35, 36, 37, 38 are hung on the grill pulleys 31, 32, 33, 34, the leading end fittings 61, 62, 63, 64 of the hanging strap do not get in the way.
[0025]
As described above, since the suction grill 8 can be easily detached from the decorative panel 7, maintenance of the suction grill 8, replacement of the suction grill 8, and the like are simplified.
[0026]
【The invention's effect】
According to the present invention, even if the suction grill elevating device breaks down while the suction grille is in close contact with the decorative panel, the clutch-equipped drum is idled by suspending a part of the suction grille on the clutch-equipped drum side, so that the hanging string Is extended, a wide gap is formed between the suction grille and the decorative panel, and the ends of the hanging straps can be disconnected from this gap. If the connection of one set of hanging straps is released, the suction grille is further expanded, so that the other sets of hanging straps can also be removed and the suction grilles can be removed from the decorative panel. Thus, since the suction grille can be separated from the decorative panel, even if the lifting device breaks down, the inspection and repair work can be performed relatively easily. Also, during normal repairs and maintenance of the air conditioner body, if you open the suction grille and remove the hanging strap, the suction grille will not get in the way of work, allowing you to expand the work space and shorten the work time. I can plan. Furthermore, the suction grill can be easily replaced. Also, since the total length of the hanging straps on the drum side without the clutch is longer than the total length of the hanging straps on the drum side with the clutch, when lifting the suction grille, the suction grille on the drum side with the clutch Even if the drum with the clutch stops and the other drum comes into close contact with the other side of the suction grille, the side of the Will not stop and will not be half-opened, and the suction grill will always close in close contact with the decorative panel.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a ceiling-embedded air conditioner.
FIG. 2 is a perspective view showing an embodiment of a ceiling-embedded air conditioner according to the present invention.
FIG. 3 is a plan view showing a decorative panel of the present invention.
FIG. 4 is a perspective view showing a state where the suction grill of the present invention is suspended.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ceiling embedded type air conditioner 7 Decorative panel 8 Suction grill 35, 36, 37, 38 Hanging string 41 First drum 42 Second drum 43 Third drum 44 Fourth drum 31, 32, 33, 34 Grill pulley (guide)
65, 66 Center bracket 48 Clutch

Claims (2)

A suction grill supported on the decorative panel so as to be movable up and down, four suspension straps for suspending the suction grill so as to be movable up and down, a shaft rotated forward and backward by a motor, and the suspension strap attached to the shaft is wound around And an air conditioner configured to raise and lower the suction grill by the rotation of the drum accompanying the rotation of the shaft, and the suction grill is provided with guides for passing the suspension straps on two opposite sides respectively. Removably connected through the end fittings attached to the ends of the hanging straps and the central fittings connecting these tip fittings with the hanging straps inserted through each side and the ends of the hanging straps inserted through each side. And an air conditioner provided with a clutch for transmitting or releasing the rotational force of the shaft to at least one of the drums.   Of the two sets of hanging straps inserted through and connected to the guide, the total length of the hanging straps wound on the drum side provided with the clutch is the total length of the hanging straps wound on the other drum side. The air conditioner according to claim 1, wherein the air conditioner is shorter than a total length.

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