JPH10110966A - Indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a filter replacing work, ensure a reduction in labour and safety in operation in spite of a ceiling fixed type by a method wherein there is provided an opening closing driving mechanism for advancing or retracting a working cable to open or close a decorative panel filter fixing section in respect to a main body of the device. SOLUTION: A space section 34 is formed between a drain pan 31, a base plate 32 and an ornamental panel 24 and there is arranged an opening/closing driving mechanism 35 for use in driving the ornamental panel 24. When a filter lamp is turned on, it is judged that a filter 29 is clogged and its cleaning is carried out. At this time, a motor 41 of the opening/closing driving mechanism 35 is electrically energized to perform a rotational driving of a worm 46. A worm gear 45 engaged with this worm 46 is rotated and a driving pulley 38 is rotated, and a belt 40 between the driving pulley 38 and a driven pulley 39 starts running and reciprocates. Then, a pin 43 for fixing a wire 37 is moved and a free end of a filter fixing part 24b at the other end of the wire descends. Since this filter fixing part 24b comes the a front surface position of a user, removal of dust can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner arranged behind a ceiling, and more particularly to an improvement in a decorative panel structure.

[0002]

2. Description of the Related Art A commonly used indoor unit of an air conditioner is of a so-called wall-mounted type, and is mounted at a high position on a wall surface of a room to be air-conditioned. This type of indoor unit is reduced in size by minimizing the protruding dimension from the wall surface and the vertical dimension in the vertical direction as much as possible.

However, no matter how the miniaturization is promoted, since it is still mounted on the wall surface, it is inevitable to protrude to some extent, and therefore, there is a feeling of oppression.

[0004] For these reasons, indoor units of air conditioners arranged behind the ceiling tend to be frequently used. With this type of unit, there is no feeling of oppression at all and the necessary air conditioning action can be obtained without impairing the aesthetic appearance.

A conventional indoor unit of an air conditioner arranged behind a ceiling is configured as shown in FIG. That is, in the figure, reference numeral 1 denotes a unit body which is a housing embedded in the ceiling A of the room R to be air-conditioned. The surface of the unit body 1 facing the ceiling A is open, and the opening 2 is closed by the decorative panel 3.

[0006] The decorative panel 3 is provided with a suction port 4 and a discharge port 5, and is open to the room R to be air-conditioned. In addition, a suction port 4 is provided in the unit body 1.
The heat exchanger 6 is disposed obliquely at a position opposed to. A cross flow fan (blower) 7 is arranged at a position facing the outlet 5.

The cross-flow fan 7 is operated by a fan motor 7M shown by a broken line, sucks air to be conditioned into the housing 1 from the suction port 4, passes through the indoor heat exchanger 6, and then flows to the discharge port 5. It is made to let.

The suction port 4 is provided with an upper and lower louver mechanism 8 and a left and right louver mechanism 9. The upper and lower louver mechanism 8 includes an upper and lower louver 10 that is swingably supported at one end in the width direction and opens and closes the outlet 5, and a drive motor 10 </ b> M that drives the upper and lower louvers 10 to swing.

The upper and lower louvers 10 have the other end in the width direction outside the edge of the outlet 5, and can guide the blown air substantially parallel to the ceiling surface A with a slight opening as shown by the solid line. Or, as shown by a two-dot chain line, air can be blown obliquely downward and guided.

The left and right louver mechanism 9 includes a plurality of left and right louvers 11 supported swingably by a plurality of shafts, and a drive motor 11 for driving the left and right louvers to swing left and right.
M. Each of the electric components described above is electrically connected to the control device 12 and is controlled based on a control signal from the control device.

A suction grill 13 is fitted into the suction port 4, and a filter 14 is removably mounted on the suction grill 13 in a state of overlapping with the suction grill 13. Therefore, immediately before the air to be air-conditioned room R is sucked into the unit body 1 from the suction grill 13, the filter 14 captures and removes dust contained in the air to be air-conditioned room.

[0012]

When such an air conditioner is operated for a long period of time, the filter 14 traps a predetermined amount or more of dust, resulting in clogging and an increase in ventilation resistance. , Causing a decrease in heat exchange capacity.

Therefore, when the filter 14 is clogged, or when the filter lamp provided on the unit body 1 is turned on to detect the clogging of the filter, the filter is cleaned.

Although this operation must be performed by the user, the unit cannot be reached as it is because the unit body 1 is mounted on the ceiling surface. Therefore, the user takes a step on a step ladder, a stepladder, or the like, and takes a posture that can afford to touch the ceiling A.

Then, the filter mounting portion of the decorative panel 3 is removed and placed on an easily accessible place such as a floor. Remove the old filter from here and remove the trapped dust by appropriate means. After the replacement with a new filter, the filter mounting portion of the decorative panel 3 is lifted again and fitted into the unit main body 1.

As described above, the replacement of the filter 14 requires a great deal of labor and time for the user, and involves a risk. For this reason, not only is the heat exchange capacity reduced, but also the power consumption is increased due to the overload operation of the compressor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the labor by making it easy to replace a filter while being a ceiling-mounted type. It is an object of the present invention to provide an indoor unit of an air conditioner that ensures safety.

[0018]

According to a first aspect of the present invention, there is provided an indoor unit of an air conditioner which satisfies the above object.
As an indoor unit of an air conditioner arranged behind a ceiling, a unit main body that accommodates an indoor heat exchanger, a blower, and the like, and a lower surface portion facing the air-conditioned room of the unit main body are configured as A suction panel for introducing air to the indoor heat exchanger is provided, and a decorative panel having a detachable filter attached to the suction port and a filter mounting portion of the decorative panel turned around the unit body. A pivotal portion pivotally movably supported, an operating cable having one end connected to a free end of the filter mounting portion of the decorative panel, a belt body connected to the other end of the operating cable, and a belt body The belt is connected to a pair of pulleys for hanging endlessly and one of the pulleys, and the belt body is reciprocally driven via the pulleys to advance and retreat the operation cable. Characterized by comprising a closing drive mechanism comprising a drive source for opening and closing the filter mounting portion of the decorative panel to the unit body.

According to a second aspect of the present invention, the opening and closing drive mechanism according to the first aspect is arranged in a space between the drain pan provided below the heat exchanger and the decorative panel.

According to a third aspect of the present invention, in the opening / closing drive mechanism according to the first aspect, a DC motor capable of normal and reverse rotation is used as a drive source, and a worm and a worm gear are interposed between the drive source and the pulley. It is characterized by the following.

According to a fourth aspect of the present invention, a magnet and a magnetic member magnetically attracted to the magnet are attached to a portion of the decorative panel according to the first aspect facing the filter attaching portion and the unit body.

According to a fifth aspect of the present invention, the opening / closing drive mechanism according to the first aspect performs a closing operation of the filter mounting portion of the decorative panel when the air conditioning operation switch is turned on. According to a sixth aspect of the present invention, the opening and closing drive mechanism according to the first aspect stops the operation after continuing the operation for a predetermined time even after the operation time required for closing the filter mounting portion of the decorative panel ends. It is characterized by.

According to a second aspect of the present invention, there is provided an air conditioner indoor unit that satisfies the above object, wherein the indoor unit of the air conditioner disposed behind a ceiling includes an indoor heat exchanger and a blower. A unit main body to be housed and a lower surface portion of the unit main body facing the room to be air-conditioned are provided with a suction port for guiding air in the room to be air-conditioned to the indoor heat exchanger, and are attached to and detached from the suction port. A decorative panel on which a flexible filter is mounted, a pivot portion for rotatably supporting the filter mounting portion of the decorative panel with respect to the unit main body, and a belt body provided with an operating rope hooking pulley in an intermediate portion. , One end is connected to the free end of the filter mounting portion of the decorative panel, the middle portion is hooked on the operating rope hooking pulley, and the other end is fixed to the fixing portion. A moving rope, a pair of pulleys for hanging the belt body endlessly, and a pulley connected to one of the pulleys, and reciprocatingly driving the belt body and the working rope engaging pulley via this pulley. And a drive source for moving the operation cable forward and backward to open and close the filter mounting portion of the decorative panel with respect to the unit body.

The indoor unit of an air conditioner according to a third aspect of the present invention for satisfying the above object is, as claim 8, an indoor unit of an air conditioner arranged behind a ceiling, wherein an indoor heat exchanger and a blower are provided. A unit main body to be housed and a lower surface portion of the unit main body facing the room to be air-conditioned are provided with a suction port for guiding air in the room to be air-conditioned to the indoor heat exchanger, and are attached to and detached from the suction port. A decorative panel on which a flexible filter is mounted, a pivot portion for rotatably supporting the filter mounting portion of the decorative panel with respect to the unit main body, and a belt body provided with an operating rope hooking pulley in an intermediate portion. An idle pulley provided in the vicinity of the belt body, and a long shape in which an intermediate portion is folded back and bent, and both ends of the idle pulley are attached to the filter of the decorative panel. The intermediate part is double-engaged with the operating rope hooking pulley, and the folded-back intermediate part is endlessly movable with the operating rope engaged with the idle pulley and the belt body. A pair of pulleys to be hooked and one of the pulleys are connected to a support shaft, and the belt body and the operating rope engaging pulley are reciprocally driven through this pulley, and the operating rope is moved forward and backward to move the above-mentioned decorative panel. And a drive source for opening and closing the filter mounting portion with respect to the unit body.

By adopting the means for solving the problems as described above, in the inventions of claims 1 to 6, the filter can be replaced safely and easily, and the heat exchange capacity is high. Can be kept in a state.

According to the seventh aspect of the present invention, the filter can be replaced safely and easily, the heat exchange capacity can be maintained at a high level, and the filter can be opened and closed at a distance twice the driving distance. , Half the processing time.

According to the eighth aspect of the present invention, the filter can be replaced safely and easily, the heat exchange capacity can be maintained at a high level, and the filter can be opened and closed at twice the driving distance. , Half the processing time. Furthermore, the inclination of the working cable is suppressed by absorbing the extension of one of the working cables.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings. FIGS. 1, 2 and 4 show an indoor unit of an air conditioner. In the drawings, reference numeral 21 denotes a unit main body formed in a rectangular box shape having an open lower surface. A receiving member 22 protrudes from an outer surface of a side surface portion 21a along a lateral direction of the unit main body 21 and is hung by a suspension bolt 23 which is vertically suspended from the back of a cabin or the like.

The opening on the lower surface of the unit body 21 is closed by a decorative panel 24. The decorative panel 24 is exposed from the ceiling A to the room to be air-conditioned R, but the unit main body 21 excluding the decorative panel 24 projects from the ceiling A to the space W above the ceiling.

In addition, a plurality of outlets 25 are respectively opened on both side portions 21b. These outlets 2
5 is connected to an outlet duct 26 extending to a predetermined portion.

A pair of indoor heat exchangers 27 and a blower 28 are arranged in the interior space of the unit body 21 so as to face each other. The indoor heat exchanger 27 is arranged along the longitudinal direction of the unit main body 21 and close to both side portions 21a in the longitudinal direction.

To be more specific, the indoor heat exchanger 27 is inclined so that the upper end is on the outside and the lower end is on the inside. In particular, as shown in FIG. When viewed, both indoor heat exchangers 27 are inclined in an inverted C-shape.

Each blower 28 is connected to the indoor heat exchanger 27
And the axial direction thereof is along the short direction of the unit body 21 which is a direction orthogonal to the longitudinal direction of the indoor heat exchanger 27.

The blowers 28 include a fan motor FM fixed to the unit main body 21 by the support base 30 and a sirocco fan F attached to a rotation shaft of the fan motor FM.
, And the positions of the fan motor and the fan are arranged left and right reversed in plan view.

This sirocco fan F has a characteristic of sucking in from the axial direction and blowing out in the circumferential direction. The indoor heat exchangers 27 are arranged facing each other in the respective suctioning directions. It is guided to the outlet 25 on the side.

That is, when the fan motors FM are provided on the same side, the rotation directions of the fan motors must be reversed, and two types of fan motors must be prepared. This will prevent this.

A filter 29 is provided between each indoor heat exchanger 27 and the unit body side surface 21a. To be more specific, the filter 29 has a predetermined gap with the indoor heat exchanger 27 and is inclined so as to be substantially parallel to the indoor heat exchanger. 24 is detachably attached.

A drain pan 31 is disposed at the lower end of each indoor heat exchanger 27 so as to receive drain water generated by condensation in each indoor heat exchanger 27. A substrate 32 is integrally provided between the drain pans 31.

On the other hand, the decorative panel 24 has a pair of suction ports 33 opened. These suction ports 33 have a rectangular shape and are provided along the inside of the longitudinal side surface 21 a of the unit main body 21. Since the decorative panel 24 is exposed inside the room, the suction port 33 provided here opens into the room R.

As shown in FIG. 1A only, a space 34 having a narrow height direction is formed between the drain pan 31 and the substrate 32 and the decorative panel 24 so that the decorative panel 24 can be opened and closed. An opening / closing drive mechanism 35 which will be described later is driven.

As shown in FIGS. 2 and 4, the decorative panel 24 has a peripheral frame 24a, a filter mounting portion 24b surrounded by the peripheral frame 24a to form a suction port, and to which a filter is mounted. This filter mounting part 2
4b, and a central panel portion 24c that houses the opening / closing drive mechanism 35.

One longitudinal side of the filter mounting portion 24b is connected to the peripheral end frame portion 24a via a pivot 36. One end of a pair of wires 37 serving as an operation cable is connected to both sides of the side opposite to the pivot 36. The other end of the wire 37 extends to the opening / closing drive mechanism 35 disposed in the space 34 in the central panel 24c.

The opening / closing drive mechanism 35 is as shown in FIG. That is, the driving pulley 38, the driven pulley 39, the belt body 40 wrapped endlessly between these pulleys, the driving source 41 that rotationally drives the driving pulley 38, and the pivoting portion 36 described above. And a wire 37.

A fixing member 4 is provided at a predetermined portion of the belt body 40.
2 are provided, and a pin 43 is provided on the other end of the wire 37, which is attached and fixed in a state where the other end of the wire 37 is bundled. In particular, as shown in FIG. 5, the support shaft 38a of the drive pulley 38
It is connected to a worm gear 45 via a bearing 44 a provided on the receiving base 44. That is, the worm gear 45
And the support shaft 38a of the drive pulley 38 are integrally rotatably supported by the bearing portion 44a.

The worm 46 meshing with the worm gear 45 is fitted on a rotating shaft 41a of a driving motor 41 as a driving source. The drive motor 41 is supported by the receiving base 44, and here, a DC motor that can rotate forward and backward is used.

As shown in FIG. 4 again, magnets 47 are mounted on the free end side of the filter mounting portion 24b and on both sides. A magnetic member 48 that is magnetically attracted to the magnet 47 is attached to a portion of the peripheral end frame portion 24a facing the magnet 47.

This is an indoor unit of the air conditioner configured as described above, and the decorative panel 24 has a flat plate shape in a normal posture. That is, the filter mounting portion 24b is in close contact with the peripheral end frame portion 24a and the central panel portion 24c, and the filter 29 mounted here is at a position correctly facing the indoor heat exchanger 27 as shown in FIG.

The refrigeration cycle operation and the blower 2
8 drives the air-conditioned room air into the suction port 33.
From the unit body 21. Then, when passing through the filter 29, dust contained in the air-conditioned room air is captured. This air is guided to the indoor heat exchanger 27 to perform heat exchange, and is blown from the outlet 25 to a predetermined portion through the blow duct 26 to achieve air conditioning at the blowing location.

When the operation is performed for a predetermined period or when a filter lamp (not shown) is turned on, it is determined that the filter 29 is clogged, and the dust trapped by the filter 29 is removed.

At this time, the drive motor 41 of the opening / closing drive mechanism 35 is energized to rotate the worm 46. The worm gear 45 meshing with the worm 46 rotates, and the drive pulley 38 rotates in the forward direction.

The belt body 40 stretched between the driving pulley 38 and the driven pulley 39 starts running and moves forward.
Accordingly, a pin 4 for fixing one end of the wire 37
3 moves. The wire 37 follows the direction in which the wire 37 is unreeled, and the free end of the filter mounting portion 24b connected to the other end of the wire gradually descends.

That is, the filter mounting portion 24b rotates about the pivot portion 36 as a fulcrum, and opens the peripheral frame portion 24a and the central panel portion 24c. As shown in FIG. 4, when the filter mounting portion 24b is substantially vertical, the operation of the drive motor 41 is stopped.

For example, the ceiling A to which the indoor unit is attached
If the height from the floor is about 2400 mm,
When the posture of the filter mounting portion 24b is changed to a substantially vertical state, the center position of the filter mounting portion is approximately 180 degrees from the floor surface.
At a height of 0 mm, the lower end of the filter mount is at a height of about 1300 mm from the floor.

Therefore, the filter mounting portion 24b
At the same time, the filter 29, which changes its posture to the vertical state, is located almost in front of the user, so that the user can easily work without using a stepboard or the like or taking an unreasonable posture on the toes.

After cleaning the filter 29 or removing the captured dust using a vacuum cleaner or the like, the filter is mounted again at a predetermined position of the filter mounting portion 24b. Since the posture of the filter mounting portion 24b is not changed, the mounting operation is easy, the safety is secured, and the operation can be performed promptly.

Next, a command to close the filter mounting portion 24b is issued by a dedicated button provided on a remote controller or the like, and the drive motor 41 is driven. Since the drive motor 41 is driven in the reverse direction to move the belt body 40 backward, the wire 37 moves in the retracting direction and pulls up the free end of the filter mounting portion 24b. The filter mounting portion 24b gradually becomes the peripheral end frame portion 2.
4a is closed.

Finally, the filter mounting portion 24b contacts a limit switch (not shown) to completely close the peripheral end frame portion 24a. At this time, the power supply to the drive motor 41 is set so as to end at the time required for closing the filter mounting portion 24b + α, and the power supply to the drive motor 41 is not completed even if the limit switch fails. However, the lock current to the drive motor 41 can be reduced for a short time to prevent continuous operation of the motor, thereby ensuring protection.

When the filter mounting portion 24b is in the peripheral frame portion 24a
When the flat decorative panel 24 is formed in close contact with
The magnet 47 of the filter mounting portion magnetically attracts the magnetic member 48 of the peripheral frame portion 24a.

According to the structure of the opening / closing drive mechanism 35 described above,
Originally, the filter attaching portion 24 was
Since the free end of b is held closed, the wire is likely to be stretched. However, the use of the magnet 47 and the magnetic member 48 can reduce the load on the wire 37 and prevent the wire 37 from being stretched.

The opening / closing drive mechanism 35 is connected to the drain pan 31
And a space portion 34 in the central panel portion 24c of the decorative panel 24
, So that the space can be effectively used. Then, dust is prevented from adhering to the components without using a separate cover or the like.

The drive motor 41 is a DC motor capable of rotating forward and reverse.
Since a worm 46 is fitted to the motor and the drive pulley 38 is driven to rotate via the worm gear 45, spontaneous rotation of the drive pulley 38 can be restricted. Therefore, accidental opening of the filter mounting portion 24b is prevented, and safety is ensured.

Note that the specification for extending the wire 37 is not limited to the above embodiment. For example, here, one end of the wire is connected to both sides of the free end of the filter mounting portion 24b, so two wires are required. If the wire is connected only to the center of the free end, one wire is required. Just use the wire.

Further, the air conditioner may not be operated when the filter mounting portion 24b is not closed, that is, not in contact with the limit switch. That is, when the start of operation of the air conditioner is instructed by a remote controller or the like, if the filter mounting unit 24b is not in contact with the limit switch, the drive motor 41 is driven prior to operation of the air conditioner to drive the filter mounting unit. 24b is closed, and then the air conditioner is operated.

In this way, even if the wire 37 expands due to long-term use and the filter mounting portion 24b opens slightly, the wire 37 absorbs the expansion and loosens when the air conditioner starts operation. Can be prevented.

The opening / closing drive mechanism 35 having the structure shown in FIG.
A may be used. In this case, the components from the drive motor 41 to the belt body 40 are the same as those described above, and the same reference numerals are given and new description is omitted.

A movable gantry 50 is directly mounted in the middle of the belt body 40. A support shaft 51a for pivotally supporting the wire pulley 51 is protruded from the movable base 50. The wire 37a is engaged with the wire pulley 51 in a state where the middle portions of the two wires 37a are overlapped.

One end of each of the wires 37a is connected to both sides of the free end of the filter mounting portion 24b in the same manner as described above. The other end of the wire 37a is formed in a U-shape through a wire pulley 51 together with the one end of the wire, and is bundled and fixed to a fixing pin 52 which is a fixing portion provided near the belt body 40. .

Therefore, when the drive motor 41 is driven to move the wire pulley 51 together with the belt body 40 by, for example, L as shown in FIG.
The end connected to the filter mounting portion 24b moves by 2L according to the so-called pulley principle.

According to the opening / closing drive mechanism 35A, the wire 37a moves twice as long as the moving distance of the belt body 40, and the opening / closing of the filter mounting portion 24b takes half the time of the opening / closing drive mechanism 35 in FIG. And the processing can be speeded up.

The opening / closing drive mechanism 35 having the structure shown in FIG.
B may be used. In this case, the movable gantry 50 is provided between the drive motor 41 and the belt
Is mounted, and a support shaft 51a for pivotally supporting the wire pulley 51 is provided in the same manner as in the above-described embodiment.

The wire 37b is composed of a single long wire. The middle portion of the wire 37b is folded in two, and both ends are connected to both free ends of the filter mounting portion 24b.

The middle part of the wire 37b is doubly bundled and engaged with the wire pulley 51 in a U-shape. The folded intermediate portion is engaged with an idle pulley 53 provided near the belt body 40. Although the idle pulley 53 itself is rotatable, its position is fixed.

Therefore, when the drive motor 41 is driven to move the wire pulley 51 together with the belt body 40,
Filter mounting portion 24b of wire 37b hooked here
As described above, the end connected to the filter can be moved twice to open and close the filter mounting portion, and the processing can be speeded up.

Further, one long strip of wire 37b
Was used by folding the middle part, so that the central panel part 24
With the opening and closing of b, even if any one of the wires connected to both free ends expands, the expansion is absorbed on the other side. As a result, the center panel portion 24b is always opened and closed without tilting while the free end side keeps a horizontal state, and the center panel portion 24b is uniformly adhered to the peripheral end frame portion 24a so that no gap is generated. Further, it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0075]

As described above, according to the first aspect of the present invention, the opening / closing drive mechanism for moving the operating cable forward and backward to open and close the filter mounting portion of the decorative panel with respect to the unit body is provided.

According to the second aspect of the present invention, the opening / closing drive mechanism is disposed in the space between the drain pan provided below the heat exchanger and the decorative panel. According to the invention of claim 3,
A forward / reverse rotating DC motor was used as a drive source of the opening / closing drive mechanism, and a worm and a worm gear were interposed between the motor and the pulley.

According to the fourth aspect of the present invention, a magnet and a magnetic member are mounted on the facing portion of the decorative panel where the filter mounting portion and the unit main body face each other. According to the invention of claim 5, when the air-conditioning operation switch is turned on, the closing operation of the filter mounting portion of the decorative panel is started.

According to the sixth aspect of the present invention, after the operation time required for closing the decorative panel ends, the operation is continued for a predetermined time and then stopped. Therefore, claim 1
According to the sixth aspect of the present invention, the filter can be automatically moved almost in front of the user, the filter can be easily replaced, and the workability and the safety can be improved. As a result, it is possible to obtain an effect that a high heat exchange ability can be always maintained.

According to the seventh aspect of the present invention, one end is connected to the free end of the filter mounting portion of the decorative panel, the intermediate portion is hooked on the pulley for operating rope hooking, and the other end is mounted and fixed to the fixing portion. With an operating cable, the filter can be easily replaced, improving workability and improving safety.
As an air conditioner, it can always maintain high heat exchange capacity, and can open and close at twice the driving distance,
Processing time is halved.

According to the eighth aspect of the present invention, the intermediate portion has a long shape that is folded back and bent, and both ends are connected to both sides of the free end of the filter mounting portion of the decorative panel, and the midway portion is engaged with the operating cable. It is doubled on the pulley, and the turn-back intermediate part is equipped with an operating cable that is hooked on the idle pulley, so that the filter can be easily replaced, improving workability and improving safety, and As a harmony machine, it can always maintain high heat exchange capacity, can be opened and closed at a distance twice as long as the drive distance, halves the processing time, and absorbs the extension of one of the operating cables to suppress the inclination And there is no gap.

[Brief description of the drawings]

FIG. 1A shows an embodiment of the first invention,
The longitudinal section of the indoor unit of an air conditioner. (B) is a cross-sectional plan view of the indoor unit with a part omitted.

FIG. 2 is a side view of the indoor unit according to the embodiment.

FIG. 3 is a perspective view illustrating a configuration of an opening / closing drive mechanism of the embodiment.

FIG. 4 is a perspective view of the indoor unit of the embodiment.

FIG. 5 is a perspective view of the indoor unit of the embodiment.

FIG. 6A shows an embodiment of the second invention,
FIG. 3 is a perspective view of an opening / closing drive mechanism. (B) is a diagram illustrating the operation of the opening and closing drive mechanism.

FIG. 7A shows an embodiment of the third invention,
FIG. 3 is a perspective view of an opening / closing drive mechanism. (B) is a diagram illustrating the operation of the opening and closing drive mechanism.

FIG. 8 is a longitudinal sectional view of a conventional indoor unit of an air conditioner.

[Explanation of symbols]

 27 ... indoor heat exchanger, 29 ... filter, 28 ... blower, 21 ... unit body, 24 ... decorative panel, 24b ... filter mounting part, 36 ... pivot part, 37, 37a, 37b ... operating cable (wire), 40 ... Belt body, 38: drive pulley, 39: driven pulley, 41: drive source (drive motor), 35: open / close drive mechanism, 31: drain pan, 34: space, 46: worm, 45: worm gear, 47: magnet, 48 ... Magnetic member, 51: Pulley for operating rope hooking (pull for wire hooking), 52: Fixed part (stop pin), 53: Idle pulley.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tetsuro Ozawa 3-3-9, Shimbashi, Minato-ku, Tokyo Inside Toshiba AV EE Co., Ltd.

Claims (8)

[Claims] An indoor unit of an air conditioner arranged behind a ceiling, comprising: a unit main body for housing an indoor heat exchanger, a blower, and the like; and a lower surface portion facing the air-conditioned room of the unit main body. A suction panel that guides air in the air-conditioned room to the indoor heat exchanger, and a decorative panel having a detachable filter attached to the suction port, and a filter mounting portion of the decorative panel attached to the unit body. A pivoting portion rotatably pivoted with respect to the armature, an operating cable having one end connected to the free end of the filter attaching portion of the decorative panel, and a belt body connected to the other end of the operating cable. The belt body is connected to a pair of pulleys for hanging the belt body endlessly and one of the pulleys, and reciprocally drives the belt body via the pulleys to advance and retreat the operation cable. And an opening / closing drive mechanism comprising a drive source for opening and closing the filter mounting portion of the decorative panel with respect to the unit body. 2. The air conditioner according to claim 1, wherein the opening / closing drive mechanism is disposed in a space between the drain pan provided below the heat exchanger and the decorative panel. Indoor unit. 3. The open / close drive mechanism according to claim 1, wherein a DC motor capable of rotating forward and reverse is used as a drive source, and a worm and a worm gear are interposed between the drive source and the pulley. The indoor unit of the air conditioner as described. 4. A room for an air conditioner according to claim 1, wherein a magnet and a magnetic member magnetically attracted to the magnet are mounted on a portion of the decorative panel facing the filter mounting portion and the unit body. unit. 5. The indoor unit of an air conditioner according to claim 1, wherein the opening / closing drive mechanism performs a closing operation of a filter mounting portion of the decorative panel when the air conditioning operation switch is turned on. 6. The opening / closing drive mechanism according to claim 1, wherein after the operation time required for closing the filter mounting portion of the decorative panel ends, the operation is continued for a predetermined time and then stopped. Item 2. An indoor unit of the air conditioner according to Item 1. 7. An indoor unit of an air conditioner disposed behind a ceiling, comprising: a unit main body for housing an indoor heat exchanger, a blower, and the like; and a lower surface portion facing the air-conditioned room of the unit main body. A suction panel that guides air in the air-conditioned room to the indoor heat exchanger, and a decorative panel having a detachable filter attached to the suction port, and a filter mounting portion of the decorative panel attached to the unit body. A pivoting portion rotatably pivoted with respect to the belt member, a belt body provided with an operation rope hooking pulley at an intermediate portion, and one end portion connected to a free end of the filter mounting portion of the decorative panel, and the intermediate portion operating at the intermediate position. One of a pulley that is hung on a rope hooking pulley and the other end of which is attached and fixed to a fixed portion, and a pair of pulleys that hung the belt body endlessly and freely. The pulley is connected to the support shaft of the pulley, and the belt body and the operating rope engaging pulley are reciprocated through the pulley to move the operating rope forward and backward to open and close the filter mounting portion of the decorative panel with respect to the unit body. An indoor unit for an air conditioner, comprising: a driving source. 8. An indoor unit of an air conditioner disposed behind a ceiling, comprising: a unit main body for housing an indoor heat exchanger, a blower, and the like; and a lower surface portion facing the air-conditioned room of the unit main body. A suction panel that guides air in the air-conditioned room to the indoor heat exchanger, and a decorative panel having a detachable filter attached to the suction port, and a filter mounting portion of the decorative panel attached to the unit body. A pivoting portion rotatably pivoting with respect to the belt member, a belt body provided with an operating rope hooking pulley in a middle portion, an idle pulley provided in a position near the belt body, and a long portion which is folded back and bent at the intermediate portion. And the both ends are connected to both sides of the free end of the filter mounting part of the decorative panel, and the middle part is double-engaged with the operating rope hooking pulley. The intermediate portion is connected to an operating cable hung on the idle pulley, a pair of pulleys hooking the belt body endlessly, and a support shaft of one of the pulleys. A drive source for reciprocatingly driving the belt body and the operating rope engaging pulley, moving the operating rope forward and backward, and driving the filter mounting portion of the decorative panel to open and close with respect to the unit body. Indoor unit of the machine.