JPH10232049A - Indoor unit for air-conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the indoor unit of an air-conditioner to be of a ceiling mouthing type, reduce labor through facilitation of a work to exchange a filter, relieve a burden and ensure safety, and perform mounting and demounting of a filter through manual operation even when a wire is broken. SOLUTION: The indoor unit of an air-conditioner comprises a unit body 21 arranged in the back of a ceiling and provided with a suction port 33 and a supply opening and containing an indoor heat-exchanger and a blower in a ventilation passage therebetween; a decorative panel 24 formed as the under surface part of the unit body 21; a filter mounting part 24b removably fitted in a decoration panel 24 and removably provided with a filter 29; a wire 37 to suspend the filter mounting part 24b and open and close the filter mounting part 24b through elevation thereof; and a latch body 1 removably engaging and holding the filter mounting part 24b along with closing of the decoration panel 24 through a wire 37 by the filter mounting part 24b.

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 disposed behind a ceiling, and more particularly to an improvement in a filter mounting structure.

[0002]

2. Description of the Related Art An indoor unit of an air conditioner arranged behind a ceiling tends 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.

[0003] In such an air conditioner as well, when the air conditioner is operated for a long period of time, a filter provided opposite to the suction port catches dust of a predetermined amount or more, and as a result, clogging occurs and ventilation resistance increases, and heat The exchange capacity is reduced.

Therefore, after a predetermined period of use, the user cleans the filter or replaces it with a new filter.

However, since the unit body is mounted on the ceiling surface, it cannot be reached as it is. Therefore, the user mounts on a step ladder, a stepladder, or the like, removes the filter mounting portion of the decorative panel, and temporarily puts the filter on a floor or other easy-to-work place.

After removing the filter and removing the trapped dust or replacing it with a new filter, the filter mounting portion is lifted again and fitted into the decorative panel. As described above, the replacement operation of the filter requires a great deal of labor and time for the user, and it is a dangerous operation, so that the user tends to be neglected.

[0007]

Therefore, recently, one end of the filter mounting portion is pivotally supported rotatably, the other end is hung from a decorative panel by a wire serving as an operating cable, and is pulled up by a motor. Alternatively, a configuration has been considered in which the four corners of the filter mounting portion are suspended by wires, pulled up by a motor, and when the filter is replaced, the filter mounting portion is moved in a stable position and within a range that can be easily reached.

However, regardless of the configuration, the wire is always connected to the filter even if the filter mounting portion is in a closed state where it is located at a predetermined position on the decorative panel and in an open state where it is moved from the decorative panel for replacing the filter. The mounting part is suspended.

That is, the load of the filter mounting portion is always applied to the wire, and the wire must be kept in a tensioned state. This is a heavy burden on the wire, and the phenomenon of "elongation" is inevitable over a long period of use.

When the wire is stretched, the responsiveness of the filter mounting portion in the elevating operation is deteriorated, and in extreme cases, the filter is cut. Should the wire ever break,
Even if the filter mounting portion is manually raised, it cannot be held at a predetermined position on the decorative panel.

The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to safely and easily replace a filter while using a ceiling-mounted type heat exchanger. In addition to maintaining a high heat exchange capacity, the operating cable can be loosened by supporting the filter mounting part with the engaging part, reducing the load on the operating cable and ensuring safety. It is an object of the present invention to provide an indoor unit of an air conditioner in which a filter can be manually attached and detached even when the air conditioner is cut.

[0012]

According to a first aspect of the present invention, there is provided an indoor unit of an air conditioner which satisfies the above object.
A unit body that is disposed behind a ceiling, has an inlet and an outlet, and accommodates an indoor heat exchanger, a blower, and the like in a ventilation path between the inlet and the outlet, and a lower surface of the unit body A filter panel that is detachably fitted into the decorative panel and that is provided in a ventilation path between the suction port and the outlet port, the filter mounting section comprising: An operating cable for suspending and raising and lowering the mounting section to open and close the filter mounting section with respect to the decorative panel, and detaching and attaching the filter mounting section as the filter mounting section closes the decorative panel with the operating cable. And an engaging portion for freely engaging and holding.

According to a second aspect of the present invention, in the indoor unit of the air conditioner according to the first aspect, the engaging portion engages and holds the filter mounting portion by being pressed and biased, and is again biased. And a latch body for releasing the engagement with the filter mounting portion.

According to a third aspect, in the indoor unit of the air conditioner according to the first or second aspect, the engaging portion is provided on the unit body.

[0015] In a fourth aspect, the first to third aspects are provided.
In the indoor unit of the air conditioner described above, the number of the engagement portions is the same as the number of the operation cables used, and the engagement portions are provided near each of the hanging positions.

According to a fifth aspect, in the indoor unit of the air conditioner according to the second aspect, the air conditioner is provided adjacent to the engaging portion, and detects that the engaging portion is in a state of engaging and holding the filter mounting portion. A storage state detection switch is provided.

According to a sixth aspect of the present invention, in the indoor unit of the air conditioner according to the fifth aspect, the operating line is driven by forward rotation to pull up the operating line, thereby raising the filter mounting portion, and being operated by reverse rotation. The motor is rotated forward from the state where the filter mounting section opens the decorative panel to the time when the storage state detection switch detects the state in which the filter mounting section is lowered by pulling down the rope. Means for driving the motor to raise the filter so as to raise the filter mounting portion, and after detecting the storage state detection switch, controlling the motor to rotate in the reverse direction to pull down the operating wire and lower the filter mounting portion. Features.

According to a seventh aspect of the present invention, in the indoor unit of the air conditioner according to the sixth aspect, the motor is once driven to rotate forward to pull up the operating cable from the state in which the engaging portion engages and holds the filter mounting portion. Means for raising and lowering the filter mounting portion, pressing the latch body again to release it, driving the motor in the reverse direction, pulling down the operating cable and lowering the filter mounting portion.

According to claim 8, claim 6 or claim 7
In the indoor unit of the air conditioner described above, a movement alarm device for issuing an alarm when the filter mounting portion is raised and lowered is provided.

According to a second aspect of the present invention, there is provided an indoor unit of an air conditioner which is disposed above a ceiling, has a suction port and a discharge port, and has the suction port and the discharge port. A unit body accommodating an indoor heat exchanger, a blower, and the like in a ventilation path between the unit, a decorative panel configured as a lower surface of the unit body, and a detachably fitted into the decorative panel, and the suction port. A filter mounting portion provided with a filter detachably provided in a ventilation path between the air outlet and the filter mounting portion,
And an operating cable that moves up and down to open and close the filter mounting portion with respect to the decorative panel, and detachably engages and holds the filter mounting portion as the filter mounting portion closes the decorative panel with the operating cable. The filter mounting portion is connected to the engaging portion to be driven, and is driven forward to pull up the operating line, thereby raising the filter mounting portion, and is driven to rotate in the reverse direction to pull down the operating line, thereby lowering the filter mounting portion. And an engaging motor,
A latch body that engages and holds the filter mounting portion by pressing and urging the filter mounting portion again to release the engagement with the filter mounting portion by pressing again; Is provided with a storage state detection switch for detecting that the filter mounting portion is in a state of engaging and holding the filter mounting portion. After the motor is rotated forward and the filter mounting part is pulled up, the motor is rotated in reverse to lower the filter mounting part and stop, and the filter mounting part is opened in response to the subsequent operation of the filter elevating switch. From the position, the motor is driven forward until the storage detection switch detects storage, and the filter mounting part is raised.After the detection, the filter mounting part is further raised. After, characterized by comprising means for controlling so as to stop lowering the filter mounting portion loosen the actuating rope by reverse rotation of the motor.

According to a tenth aspect, in the indoor unit of the air conditioner according to the ninth aspect, the filter mounting portion includes:
It is characterized in that it is provided with a means for issuing an alarm sound when descending, when ascending and immediately after stopping.

According to an eleventh aspect of the present invention, in the indoor unit of the air conditioner according to the ninth aspect, the latch body forming the engaging portion has a pressing stroke of a predetermined distance, and the storage state detection switch is a latch. It is a limit switch for determining the storage state over the entire range of the pressing stroke from the start of pressing the body to the end of pressing.

According to a twelfth aspect of the present invention, in the indoor unit of the air conditioner according to the eleventh aspect, once the filter mounting portion is pulled up by the motor from a state in which the filter mounting portion is engaged with the engaging portion, the distance of the latch is It is characterized in that it is set to be longer than the pressing stroke of the body.

According to a thirteenth aspect, in the indoor unit of the air conditioner according to the eleventh aspect, after the storage state detection switch detects the storage of the filter mounting portion, the distance for further raising the filter mounting portion is determined by the pressing of the latch body. The stroke is set to be longer than the stroke.

According to a fourteenth aspect, in the indoor unit of the air conditioner according to the eleventh aspect, even when the filter mounting portion is raised by driving the motor to rotate forward for a predetermined time after the filter mounting portion is opened, the storage detection switch is provided. An abnormal alarm device for issuing an abnormal alarm when the storage of the mounting portion is not detected is provided.

According to a fifteenth aspect, in the indoor unit of the air conditioner according to the eleventh aspect, the descending distance of the filter mounting portion is controlled by the operating time of the motor, and the operating time of the motor when the filter mounting portion is lowered is controlled. It is characterized by comprising a descending distance setting means for changing.

By adopting the means for solving the above problems, in the inventions according to the first to fifteenth aspects, the filter can be replaced safely and easily, and the heat exchanger can be easily replaced. Can maintain a high heat exchange capacity.

Since the operating cable can be loosened by supporting the filter mounting portion with the engaging portion, the load on the operating cable can be reduced and safety can be ensured. Even if there is, the filter can be manually attached and detached.

[0029]

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 figure, 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.

Further, a plurality of outlets 25 are respectively opened on both side portions 21a. 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 pair of blowers 2
8 are arranged opposite to each other. The indoor heat exchanger 27
Are arranged along the longitudinal direction of the unit main body 21 and in the vicinity of both side surfaces 21b 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 a support 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.

The sirocco fan F has a characteristic that it is sucked in from the axial direction and blows out in the circumferential direction. The indoor heat exchangers 27 are arranged so as to face each other in the suction direction, and the blown air is blown by the fan casing 28a to the side portions 21a. It is guided to the outlet 25 on the side.

A filter 29 is arranged between each indoor heat exchanger 27 and the unit body side surface 21b. These filters 29 have a predetermined gap with the indoor heat exchanger 27 and are inclined so as to be substantially parallel to the indoor heat exchanger.
Removably attached to

At the lower end of each indoor heat exchanger 27, a drain pan 31 is arranged to receive drain water condensed 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 b 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 only in FIG. 1A, a space portion 34 whose height direction is narrow is formed between the drain pan 31 and the substrate 32 and the decorative panel 24. An opening / closing drive mechanism 35 to be described later that drives the filter mounting portion 24b to be opened and closed freely is arranged.

As shown in FIGS. 2 and 4, the decorative panel 24 has a peripheral frame 24a, a filter mounting portion 24b which is provided with a suction port 33 surrounded by the peripheral frame 24a and to which the filter 29 is mounted. And a central panel portion 24c that is surrounded by the filter mounting portion 24b and 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.

An engaging portion 1 is provided at a position near one end of each wire 37 in the peripheral end frame portion 24a, while a filter mounting portion 2 facing each engaging portion 1 is provided.
A locking claw portion 2 is provided at a portion 4b. The engaging portion 1 and the locking claw portion 2 will be described later.

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. The drive pulley 38 is integrally connected to a worm gear 45,
The worm gear 45 and the drive pulley 38 are integrally and rotatably pivoted.

The worm 46 meshing with the worm gear 45 is fitted on a rotating shaft of a motor 41 as a driving source. The motor 41 employs a DC motor with a built-in planetary gear and capable of rotating forward and reverse, which prevents rotation from the output shaft.

The engaging portion 1 and the locking claw portion 2 are configured as shown in FIGS. 5 shows an open state of the filter mounting portion 24b with respect to the decorative panel 24, and FIG.
Shows a closed state with respect to.

The engaging portion 1 is composed of a latch body which is attached and fixed to the support plate 3 provided on the decorative panel 24 which is the unit main body 21. A storage state detection switch 4 is attached and fixed to the support plate 3.

The latch body 1 comprises a latch body 5 attached to the support plate 3 with the axial direction directed vertically, a latch mechanism 6 housed in the latch body 5, an operating rod 7 and a hook 8. Is done.

The latch mechanism 6 includes a pivot pin 9 provided on the latch body 5, a cam 10 pivotally supported by the pivot pin 9, and a clockwise rotation of the cam 10 in the drawing. The spring 11 includes a spring 11 that elastically urges the rotation, and a compression spring (not shown) that always elastically urges the operating rod 7 downward.

As shown on an enlarged scale in FIG.
Is provided with a groove 12 obliquely downward from a side end thereof. The groove portion 12 has a substantially V-shape provided from a bottom portion obliquely downward to an upper portion. The open end of the groove 12, which is a side end of the cam 10, is called a tip 12a, the lowest end of the groove 12 is called a bottom 12b, and the uppermost end of the groove is called an upper end 12c.

The guide tongue 13 is cut and raised from the bottom 12b of the groove 12 along the upper end 12c.
Is provided. The cut-and-raised tongue piece 13 is one side surface of the cam 10 and is cut and raised on a surface opposite to the latch body 5.

As shown in FIGS. 5 and 6 again, the operating rod 7 is set so that a part thereof always projects from the lower surface of the latch body 5, and is supported by the latch body 5 so as to be able to move up and down.

The latch body 5 is provided with a guide groove 5a extending in the vertical direction, and an operating pin 14 protruding from the operating rod 7 is always engaged with the guide groove 5a.
And it is designed to be guided along the vertical direction.

As shown in FIG. 5, the operating pin 1 of the operating rod 7
When the latch 4 is engaged with the lower end of the guide groove 5 a of the latch body 5, the downward projecting position of the operating rod 7 is regulated. The position of the operating rod 7 in the upward direction is controlled by the cam 1 as described later.
It is regulated by being locked to the upper end 12c of the groove portion 0.

The hook 8 has its upper end pivotally supported by the operating rod 7 and its lower end bent forward.
It is formed in a substantially L-shaped cross section. A spring (not shown) is provided at the pivot portion of the hook 8, and elastically urges the hook 8 in the opening direction.

That is, the hook 8 moves up and down as the operating rod 7 moves up and down, and the amount of rotation of the hook 8 is restricted in accordance with the amount of protrusion from the latch body 5.

As shown in FIG. 5, when the operating rod 7 protrudes downward at the maximum, the hook 8 makes the maximum rotation angle. When the operating rod 7 rises from this state, the hook 8 also rises accordingly.

With the operating rod 7 raised by a predetermined amount, the hook 8 slides on the open end of the latch body 5. When the operating rod 7 is further raised, the hook 8 is restricted by the opening end of the latch body 5, and the angle of rotation is reduced against the elastic force of the spring, so that the hook 8 is closed.

Before the operating rod 7 reaches the position shown in FIG. 6, the amount of rotation of the hook 8 becomes completely zero, and approximately half or more of the hook 8 is housed in the latch body 5 together with the operating rod 7. If the operating rod 7 moves downward from the position shown in FIG. 6, it goes without saying that the hook 8 performs an operation completely opposite to the operation described above.

The storage state detection switch 4 attached and fixed to the support plate 3 together with the latch body 1 is a limit switch, and its operation will be described later.

The locking claw portion 2 provided on the filter mounting portion 24b is formed of a plate piece bent substantially in a hat shape, and corresponds to the above-mentioned latch body 1 depending on the position of the filter mounting portion 24b. In position.

A switch push rod 15 is provided here, and is located at a position corresponding to the limit switch 4 depending on the position of the filter mounting portion 24b.

FIG. 8 shows a control block of the air conditioner.

The air conditioner comprises a remote control A as a remote control panel, an indoor unit B and an outdoor unit C.

The remote controller A includes a push-button type filter raising / lowering switch 16 for instructing raising / lowering of the filter 29, and a plurality of operation switches 17 for stopping the operation of the air conditioner, setting the room temperature, and setting the fan air volume of the indoor unit. Is provided.

These switches 16 and 17 are input to a control circuit 18 composed of a microcomputer or the like, and the control circuit 18 sends various operation instructions to the indoor unit B via the communication line a in accordance with these switch inputs. Do.

The remote controller A has a filter 29
Abnormality LED 19a which displays when an abnormality occurs during elevating operation, ascending / descending buzzer 19b which is a moving alarm device which emits an alarm sound during elevating, and blinking during elevating of filter 29 on the display panel of remote control A A filter raising / lowering notification lamp 19c is provided, and these operations are controlled by the control circuit 18.

On the other hand, the indoor unit B receives a command signal transmitted from the control circuit 18 of the remote controller A via the communication line a, controls the devices in the various indoor units according to the instruction, and controls the outdoor unit. Communication line a to unit C
A control circuit 20 for transmitting a command signal via the control circuit 20 is provided.

The equipment controlled by the control circuit 20 of the indoor unit B includes fan motors FM of two blowers 28 for blowing heat exchange air to the duct 26.
The motor 41, which is driven forward and reverse to drive the filter mounting portion 24b up and down through the wire 37, and the switch push rod 15 are brought into contact with and separated from the filter mounting portion 24.
two limit switches 4 for detecting the storage state of b
A rising / falling abnormality display LED 50a for displaying when an abnormality occurs during the raising / lowering of the filter mounting portion 24b, a raising / lowering notification buzzer 50b for giving an alarm sound during the raising / lowering, and a lowering distance changeover switch 51 as a lowering distance setting means. Have been.

The descending distance changeover switch 51 sets the descending distance of the filter mounting portion 24b according to the installation conditions of the indoor unit B, and is set at the time of installation work of the indoor unit B.

As described above, the setting of the descending distance changeover switch 51 is to set one of two types of descending distances, and one of them is generally used to set a large descending distance for a detached house having a high ceiling. On the other hand, less descent distances are generally chosen for low ceiling apartments.

The outdoor unit C is provided with a refrigerating cycle device such as a compressor and an outdoor controller for controlling the operation of the refrigerating cycle device in communication with the control circuit 20 of the indoor unit B. I have.

An air conditioner configured as described above,
In the normal posture in the indoor unit, as shown in FIG. 1, the decorative panel 24 has a flat plate shape. 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 2 mounted here is
9 correctly faces the indoor heat exchanger 27.

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 heat exchange 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 outlet duct 26 to achieve air conditioning of the room R to be air-conditioned.

After the operation for a predetermined period, the filter 29
Of dust trapped in the filter or a new filter 29
Exchange work with.

At this time, the filter raising / lowering switch 16 of the remote controller A is turned on (pressed). Then, the motor 41 of the opening / closing drive mechanism 35 is energized and once driven to rotate forward. The worm 46 is driven to rotate.
The worm gear 45 that meshes with the driving pulley 3 rotates.
8 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 it is lifted, and the filter mounting portion 24b connected to the other end of the wire rotates around the pivot 36, and the free end rises a predetermined distance. In this state, the filter mounting part 2
The locking claw portion 2 provided on the decorative panel 4b is released from the latch body 1 provided on the decorative panel 24.

Next, the motor 41 is driven to rotate in the reverse direction, and the opening / closing mechanisms 35 are all operated in the reverse direction, so that the
The free end of the filter mounting portion 4b rotates downward, and the filter mounting portion 24b
Opens the peripheral frame portion 24a and the central panel portion 24c.

As shown in FIG. 2 by a two-dot chain line and FIG.
The operation of the motor 41 is stopped when the filter mounting portion 24b is substantially vertical. Therefore, the filter 29, which changes its posture in the vertical state together with the filter mounting portion 24b, is located almost in front of the user, and can be easily worked without using a stepping step or the like or taking an unreasonable posture on the toes.

When the filter mounting portion 24b is opened, the descending distance can be changed and set in advance according to the installation conditions of the indoor unit. For example, in a detached house with a high ceiling, the filter mounting portion 24b is set to be substantially vertical as shown in FIG. 4, and in an apartment with a low ceiling, the filter mounting portion 24b is opened and held in an oblique state. Care is taken to prevent danger from human contact.

Next, the operation of the latch body 1 from the state in which the latch body 1 engages and holds the locking claw 2 provided on the filter mounting portion 24b to the state in which it is completely released will be described.
It will be described in order.

The state in which the latch body 1 engages and holds the locking claw portion 2 is as shown in FIGS. 6 and 9A, and the locking claw portion 2 is a hook formed in a substantially L-shape. 8 is locked to the horizontal portion.

As described above, since the filter mounting portion 24b provided with the filter 29 is supported only by the latch body 1, the load on the wire 37 is eliminated, and the load on the wire 37 does not exist at all, and the elongation occurs. Absent.

The operating rod 7 of the latch body 1 elastically abuts on the end face of the locking claw 2. The position where the latch claw 2 is held and fixed by the latch body 1 is b.

By the operation of the opening / closing drive mechanism 35, the locking claw portion 2 is temporarily moved to the top dead center together with the filter mounting portion 24b as shown by a two-dot chain line in FIG. 6 or as shown in FIG. To position c, which will be referred to as

This raising operation is called "increase", and is an operation for releasing the engagement of the latch body 1 with the locking claw 2 and opening the claw. In addition, the distance e of the increase is 3 mm.

The locking claw portion 2 at the engagement fixing position b is separated from the hook 8, and urges the operating rod 7 upward by an increasing distance e against the elastic force of the compression spring. In the latch mechanism 6, the operating pin 14 provided on the operating rod 7 rises from the bottom 12b of the groove 12 toward the upper end 12c, and is locked to the upper end to restrict further rise.

That is, the operating rod 7 moves up to the top dead center c together with the locking claw 2. At this time, since the locking claw portion 2 is separated from the hook 8, it is released from the hook 8 in this state.

Next, the opening / closing drive mechanism 35 drives the locking claw 2 downward together with the filter mounting portion 24b. FIG.
As shown in (C), the elastic return force of the compression spring acts on the operating rod 7 to push the operating rod 7 down.

The operating rod 7 descends following the downward movement of the locking claw 2. The hook 8 rotates in the inclined direction during the lowering, and the locking claw 2 continues to lower without being hooked on the hook 8. At the same time, the repulsive force of the spring engaging with the pivot of the hook acts on the operating pin 14.

Therefore, the distal end face of the operating pin 14 comes into contact with the above-mentioned guide cut-and-raised tongue piece 13 provided along the groove 12. Further, as the operating rod 7 descends, the hook 8
Becomes large, the leading end surface of the operating pin 14 is cut and raised for guiding and elastically comes into sliding contact with the piece 13.

Finally, the operating pin 14 slides along the side surface of the cam 10 from the lower end of the cut-and-raised piece 13 for guiding.
Then, as shown in FIG. 5, the operating pin 14 moves over the lower end of the cam 10 and the guide pin 5 a of the latch body 5.
Locked to the lower end, the lowering of the operating rod 7 is restricted. At this time, most of the hook 8 projects from the latch body 5.

As shown in FIG. 9D, the locking claw 2 is completely released from the latch body 1, and the lowering movement of the filter mounting portion 24b together with the locking claw 2 is completely free.

After the filter mounting portion 24b is opened and the filter 29 is normally and replaced, the filter raising / lowering switch 16 of the remote controller A is turned on, and a command to close the filter mounting portion 24b is issued.

The motor 41 is driven to rotate forward to move the belt body 40, and the wire 37 moves in the drawing direction to pull up the free end of the filter mounting portion 24b. The filter mounting part 24b gradually closes the peripheral end frame part 24a.

Finally, the filter mounting portion 24b completely closes the peripheral end frame portion 24a. At this time, the opening / closing drive mechanism 35 drives the filter mounting part 24b upward once to temporarily move beyond the engagement holding position b of the filter mounting part 24b to the top dead center c, and also increases the distance e here.

Then, the motor 41 is driven in reverse rotation at the top dead center position c to lower the filter mounting portion 24b by the distance e to the engagement fixing position b, whereby the filter mounting portion 24b is again engaged by the latch body 1. Are held together.

Next, when the filter mounting portion 24b is released from the latch body 1, the locking claw 2 is
The operation of the latch body 1 until it is engaged and held will be described in order.

The state where the latch body 1 completely releases the locking claw portion 2 is shown in FIGS. 5 and 10 (A). At this time, the amount of protrusion of the operating rod 7 and the amount of rotation of the hook 8 are maximum. The operation pin 14 of the operation rod 7 is locked at the lower end of the guide groove 5 a of the latch body 5.
As described above.

As the filter mounting portion 24b rises, the locking claw 2 rises, and finally contacts the lower end surface of the operating rod 7 to drive the operating rod 7 upward, as shown in FIG. 10B. Since the operating pin 14 of the operating rod 7 rises while contacting the end face of the cam 10, the cam 10 is urged to rotate counterclockwise against the elastic force of the spring 11.

The hook 8 also rises with the rise of the operating rod 7, and is controlled by the latch body 5 to start rotating. After the locking claw 2 has passed, the horizontal portion of the hook 8 goes under the locking claw 2 so that there is no mutual contact here.

As shown in FIG. 10C, when the operating rod 7 reaches the position of the top dead center c, the operating pin 14
It crosses over the tip 12a of the groove 12 provided at 0.
The force regulating the cam 10 is instantaneously removed, and the elastic force of the spring 11 acts on the cam to urge the cam 10 to rotate clockwise.

The operating pin 14 is located at the entrance of the groove 12. At this time, the hook 8 is in a state of locking the locking claw portion 2, but is separated from the claw portion by a predetermined distance and has not been engaged and fixed.

Next, the opening / closing drive mechanism 35 is
1 is driven to rotate in the reverse direction, and the locking claw portion 2 is driven downward by the increasing distance e from the top dead center c to the engagement fixing position b. With this lowering, the elastic force of the compression spring which presses and urges the operating rod 7 acts to move the operating rod 7 down. Note that the posture of the hook 8 is not changed.

The elastic return force of the spring 11 acts on the cam 10, and the cam 10 is urged to rotate clockwise.
The operating pin 14 is guided toward the bottom 12b of the groove 12, and finally, as described with reference to FIG.
It is hung on b and the downward movement is regulated.

This is also shown in FIG. 10D.
In this state, the locking claw 2 is engaged with the hook 8 and held.
Since the elastic force of the compression spring acts on the operating rod 7, the operating rod 7 remains in contact with the locking claw 2.

The pressing stroke s of the latch body 1 is
As shown in FIG. 3A, the distance is from the pressing start position d where the operating rod 7 projects most to the top dead center c where the pressing end position is.

As will be described later, the limit switch 4 determines the storage state over the entire range of the pressing stroke s of the latch body 1.

Next, the above operation will be described in terms of a control flowchart.

As shown in FIG. 11, the control circuit 18 of the remote controller A first determines in step S1 whether the filter lifting switch 16 has been turned on (elevated).

If it is not ON, the flow shifts to step S2, where it is determined whether or not the filter 29 in the current indoor unit B is moving up and down.

This determination is based on a filter up / down start signal sent from the control circuit 20 of the indoor unit B, which will be described later,
This is performed based on the end signal. That is, it is determined that the filter 29 is being moved up and down from when the filter up / down start signal is received until the end signal is received.

If it is determined in this step S2 that the filter 29 is not being moved up and down, the process proceeds to step S3, where an operation process as an ordinary air conditioner for cooling or heating is performed.

On the other hand, if the filter raising / lowering switch 16 is ON in step S1, the process proceeds to step S4, where a filter raising / lowering command is sent from the remote control circuit 18 to the indoor unit control circuit 20 via the communication line a.

Subsequently, in step S5, the opening / closing drive mechanism 35 is used to actually move the filter mounting portion 24b up and down.
When the motor 41 is driven, the indoor unit control circuit 20
It is determined whether or not a filter raising / lowering start signal output to remote controller A is received.

If the elevation start signal is received, step S
At 6, the buzzer 19b, which is a movement warning device, is turned on to emit a filter up / down warning sound. Then, in step S7, a filter raising / lowering notification lamp 19c on the back of the display panel is provided.
Is blinked periodically to display the elevation of the filter 29.

Thereafter, in step S8, it is determined whether or not a vertical abnormal signal has been sent from the indoor unit control circuit 20 informing that an abnormality has occurred during the vertical movement of the filter 29.

If an abnormal signal is received, step S
In step 9, the up / down abnormality display LED 19a is turned on, and in step S10, the air conditioner is completely stopped and no further operation is accepted.

If the filter elevating / lowering start signal is not received in step S5, the process jumps to step S8 to judge whether or not there is an abnormal elevating / lowering.

If no abnormal signal is received in step S8, it is determined in step S11 whether a signal indicating completion of raising and lowering the filter 29 has been sent from the indoor unit control circuit 20.

If the lifting / lowering end signal has been received, the flow shifts to step S12 to stop the raising / lowering alarm sound of the raising / lowering notification buzzer 19b previously set in step S6 and sounding up to that time.

At the same time, in step S13, the blinking of the filter raising / lowering notification lamp 19c on the operation panel ends.

If no end signal is received in step S11, the process returns to the first step S1. If it is determined in step S2 that the filter is being moved up and down, the process proceeds to step S5.

To summarize the above control operations, when the user operates the filter raising / lowering switch 16, this operation is determined in step S1, and a filter raising / lowering command is issued to the indoor unit B. As a result, when the raising / lowering of the filter mounting portion 24b is started, a filter raising / lowering start signal is output from the indoor unit B, and this is determined in step S5.

Subsequently, when the user turns on the filter raising / lowering switch 16 in a state where the filter 29 has already been lowered, it is determined again in step S1 and step S2.
Outputs a filter elevating command.

In the indoor unit B, the filter 29 has already been set.
, The filter is started to rise this time. When the filter 29 is at a predetermined position, it outputs a filter up / down end signal.

This filter raising / lowering end signal is output in step S11.
And the lifting and lowering operation of the filter 29, that is, the cleaning or replacement of the filter by the user is completed.

During the period from the start of the filter lowering (reception of the filter raising / lowering start signal) to the end of the filter raising (reception of the filter raising / lowering end signal), in step S6, the buzzer-1
9b, an alarm sound for raising and lowering the filter sounds, and step S
At 7, the ascent / descent notification lamp 19c blinks.

If an abnormality occurs during the raising and lowering of the filter 29, that is, in the case of Yes in step S8, the raising / lowering abnormality display LED 19a is turned on in step S9, leading to a total stop in step S10. Not accepted.

After the filter mounting portion 24b is lowered, steps S1, S2, S5, S8, S are performed until the filter 29 is removed and mounted therefrom.
The sequence is repeated in the order of 11.

Next, a control flowchart of the indoor unit B will be described with reference to FIG.

In the first step T1, it is determined whether or not a filter up / down start signal has been input from the remote controller A.

If the filter raising / lowering command has been input, the process shifts to step T2 to determine whether or not the indoor unit B is operating. If the operation is in progress, in step T3, all operations of the blower 28 and the like are stopped.

On the other hand, if the filter elevating command has not been input in step T1, the process proceeds to step T4, and it is determined whether or not the filter 29 is currently being raised or lowered.

If the filter is being moved up and down, steps T1 and T4 are repeated until the next filter up / down command is received. If the vehicle is not moving up and down, the process shifts to step T5 to perform a normal operation process.

If the indoor unit B is not operating in step T2, the open / close state of the limit switch 4 for detecting the stored state of the filter mounting portion 24b is determined in step T6.

If the limit switch 4 is open, it is determined that the filter mounting portion 24b is lowered, and the filter 29 is stored in the indoor unit B based on the filter lifting / lowering command. Transition to the filter ascending flow.

On the other hand, when the operation is stopped in step T3 and when the limit switch 4 is closed,
Since the filter mounting portion 24b is housed in the indoor unit B, the lowering of the filter 29 is started.

In the lowering operation of the filter 29, first, at step T7, a filter raising / lowering alarm sound is generated by the raising / lowering notification buzzer 50b, and at step T8, a raising / lowering / uppering start signal of the filter 29 is output to the control circuit 18 of the remote controller A.

Then, at step T9, the timer of the latch release timer t1 is started, and then at step T10, the opening / closing drive mechanism 35 is pushed up to push up the operating rod 7 to release the locking claw 2 from the latch body 1. The motor 41 starts rotating in the direction A (the direction in which the filter mounting portion 24b rises).

Then, the process shifts to step T11 to determine whether or not the time counted by the latch release timer t1 has exceeded 3 seconds.

Incidentally, the motor 41 of the opening / closing drive mechanism 35 is
As described above, a brushed DC motor that incorporates a planetary gear and prevents rotation from the output shaft is employed. In the motor 41, the number of rotations is proportional to the operation (energization) time.

The rising distance of the filter mounting portion 24b pulled up via the wire 37 is almost proportional to the number of rotations of the motor 41. Therefore, the control of the amount of rise and fall of the filter mounting portion 24b can be performed by controlling the rotation direction of the motor 41 and the energizing time.

In this case, the filter mounting portion 24b rises with the rotation of the motor 41 due to the motor energization for 3 seconds. The rising distance of the filter mounting portion 24b is 3 mm as described above.

Note that this 3-second energization (pressing stroke) takes into account the elongation of the wire 37 and takes a little longer than the pressing stroke for releasing the latch from the stored state of the filter mounting portion 24b. Is set to rise. For this reason, a clutch (not shown) is provided between the motor 41 and the wire 37 so as to prevent the filter mounting portion 24b from being excessively pulled up by more than the pressing stroke.

(Are there consistency with the description of the latch mechanism above?) In step T10, the rotation of the motor 41 in the direction A is continued until the timer t1 measures 3 seconds. Is longer than 3 seconds, the motor 41 is temporarily stopped in step T12. At this point, as described above, the locking claw 2 of the latch body 1
Is released from engagement.

Subsequently, in order to determine the descending distance of the filter mounting portion 24b, the setting of the descending distance switch 51 is read.
It is determined whether 1 is set on the detached house side or the apartment side.

If the descending distance changeover switch 51 is set for a detached house, the setting ts of the motor energizing time for descending the filter 29 is set to the longer 35 seconds in step T14.

In the case of setting for an apartment, the setting of the motor energizing time for descending in step T15 is set to the shorter 20 seconds.

In any case, the process proceeds to step T16,
Start timing of the motor descent timer t2, and
1 is rotated in the direction of lowering the filter mounting portion 24b, which is the B direction.

Since the latch body 1 has already been released from engagement with the locking claw portion 2, the filter mounting portion 24b
Begins to descend. During this lowering, the time measured by the motor lowering timer t2 is compared with the energizing time ts of the motor 41 in step T18.

Then, when the time counted by the motor descent timer t2 exceeds the energizing time ts of the motor 41, the process shifts to step T19 and the motor 41 is stopped.

When a long time is set in the motor descent timer t2, the filter 29 is lowered to a position lower than the position of the indoor unit B. Conversely, when a short time is set, the filter 29 is set in a higher position. Will stop falling.

Next, at step T20, it is determined whether or not both limit switches 4 are open. If there is no obstacle immediately before the filter mounting portion 24b, the filter 29 should normally be lowered to the lower side. If normal, the two limit switches 4 are both open.

Therefore, if all the limit switches 4 are open, the user returns to the start to maintain the state during the cleaning / replacement work of the filter 29,
Steps T1 and T4 are repeated until a new command for raising and lowering the filter 29, that is, a filter raising command for storing the filter mounting portion 24b in the indoor unit B is input from the remote controller A.

On the other hand, the limit switch 4
If at least one of them is closed, the process proceeds from step T20 to step T21, where data of the elevation abnormality is set, the elevation abnormality display LED 50a is turned on, and the elevation abnormality signal is transmitted to the remote controller A. The air-conditioning operation is completely stopped.

As described above, on the remote controller A side, the elevation abnormality LED 19a of the remote controller A is turned on in accordance with the elevation abnormality signal.
When an abnormality is detected, both the indoor unit B and the remote controller A notify the abnormality.

Therefore, even when the remote controller A and the indoor unit B are installed in different rooms, it is possible to confirm the occurrence of an abnormal elevation in any room.

Next, a flowchart for storing the filter mounting portion 24b after the cleaning and replacement work of the filter 29 is completed will be described with reference to FIG.

First, at step U1, in the worst case, a maximum allowable timer t for measuring a maximum motor energizing time for raising the filter mounting portion 24b to a predetermined position.
3 starts working.

Subsequently, in step U2, the motor 41 is set to A
The operation of rotating in the direction (the direction in which the filter mounting portion 24b is raised) is started.

In step U3, while the filter mounting portion 24b is being raised, the filter mounting portion is moved to the indoor unit B.
Is determined by the open / closed state of all the limit switches 4.

When all the limit switches 4 are closed,
In steps T5 to U8, the operation lever 7 is pushed up to engage and hold the locking claw portion 2, that is, the so-called increase is started.

On the other hand, if at least one of the limit switches 4 is in the open state, the flow shifts to step U4 to determine whether or not the maximum allowable timer t3 has exceeded the maximum time limit of 50 seconds.

If any one of the limit switches 4 does not close even after 50 seconds have elapsed from the start of energization of the motor 41, any foreign matter is caught between the filter mounting portion 24b and the indoor unit B. It is highly likely that it has been embedded.

That is, it is determined that the vehicle is in an abnormal state, and abnormal processing similar to steps T21 and T22 at the time of descending is performed in steps U15 and U16.

To increase the engagement claw portion 2 so as to engage and hold the hook 8 of the latch body 1, first, at step U5
Timer t4 for setting the additional time at
Starts timing.

Subsequently, at step U6, the timer t
It is determined whether the counted time of 4 exceeds 3 seconds. Here, when the time exceeds 3 seconds, the power supply to the motor 41 is stopped in step U7, and the rising of the filter mounting portion 24b is stopped.

In the state of step U6, step U
Since the rotation of the motor 41 set in 2 is continued,
As a result, the filter mounting portion 24b is further raised for 3 seconds after all the limit switches 4 are closed, and the operating rod 7 of the latch body 1 reaches the top dead center c by the rise for 3 seconds.

Subsequently, at step U8, the timer t5
Start of step U9 and step U9 and step U
In step 11, the motor is rotated in the direction B (the direction in which the filter mounting portion 24b is lowered) until the time exceeds 3 seconds.

As a result, the filter mounting portion 24b is lowered, and the locking claw portion 2 is securely engaged with the hook 8 of the latch body 1, and at the same time, the wire 37 is slightly loosened.

As a result, the filter mounting portion 24b provided with the filter 29 is supported only by the latch body 1, and no load is applied to the wire 37, no load is applied to the wire, and no elongation occurs.

However, even in this state, the latch body 1 does not operate due to any abnormality and the filter mounting portion 24b
Is not at all possible to drop to a predetermined position.

In order to cope with this, the state of all the limit switches 4 is confirmed in step U10 during descent.
If the limit switch 4 remains closed even if it is lowered,
The lowering is carried out for 3 seconds as it is, and if any of the limit switches 4 is opened in the middle, it is determined that the latching body 1 has not been engaged, and the abnormal processing after step U15 is performed.

If the filter mounting portion 24b is normally supported by the latch body 1, the motor 41 is stopped in step U12, followed by output of a filter raising / lowering end signal, and a raising / lowering alarm sound by the raising / lowering buzzer 50b of the indoor unit B. Is stopped, the filter raising / lowering notification lamp 19c output to the remote controller A is turned off, and the raising / lowering notification buzzer 1
9b is stopped.

If it is determined in step U4 and step U10 that there is an abnormality, in step U15 the elevation abnormality data is set, the elevation abnormality display is turned on, and an elevation abnormality signal is output to the remote controller.
At 16 it is a complete stop.

In the above embodiment, one end of the filter mounting portion 24b is rotatably supported via the pivot 36, and the other end is a free end so that it is automatically driven up and down. However, the present invention is not limited to this. For example, a configuration in which the entire filter mounting portion is driven up and down in parallel, and a configuration in which the user pulls the wire by manually lifting and lowering the filter mounting portion may be used. Applied.

Further, a wire is applied as the operating cable 37, but the present invention is not limited to this, and a rope, a string, or a kind of so-called tex may be used.

Also, the duct type air conditioner has been described as an indoor unit.
The present invention is also applicable to an indoor unit having an outlet.

[0183]

As described above, according to the present invention, the filter can be safely and easily replaced even though it is a ceiling-mounted type, and the heat exchange capacity of the heat exchanger is increased. And the filter mounting part is supported by the engaging part, so that the working cable can be loosened, reducing the load on the working cable and ensuring safety. Even if there is an effect, an effect is achieved such that the filter can be manually attached and detached.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional view of an indoor unit of an air conditioner, showing an embodiment of the present invention. (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 diagram illustrating a configuration of an engaging portion and a locking claw portion of the embodiment.

FIG. 6 is a view for explaining the engaging portion and the locking claw portion of the embodiment in a state different from FIG. 5;

FIG. 7A is a front view of the cam according to the embodiment.
(B) is a longitudinal sectional view of the cam.

FIG. 8 is an electric block diagram of the air conditioner of the embodiment.

FIGS. 9A to 9D are diagrams for sequentially explaining steps from the engagement holding to the release of the locking claw by the latch body according to the embodiment;

FIGS. 10A to 10D are diagrams for sequentially explaining the steps from the release state of the locking claw portion to the engagement and holding state by the latch body according to the embodiment;

FIG. 11 is a flowchart of the remote controller of the embodiment.

FIG. 12 is a flowchart illustrating opening of a filter mounting portion according to the embodiment.

FIG. 13 is a flowchart illustrating the closing of a filter mounting portion according to the embodiment.

[Explanation of symbols]

 33 ... inlet, 25 ... outlet, 27 ... indoor heat exchanger, 28 ... blower, 21 ... unit body, 24 ... decorative panel, 24b ... filter attaching part, 37 ... operating cable (wire), 1 ... engaging part (Latch), 4: storage state detection switch (limit switch), 41: motor.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroyuki Sugiyama 336 Tatehara, Fuji-shi, Shizuoka Prefecture Inside Fuji Plant, Toshiba Corporation (72) Inventor Daisuke Saito 336 Tatehara, Fuji City, Shizuoka Prefecture Inside Fuji Plant, Toshiba Corporation

Claims (15)

[Claims] 1. A unit body which is arranged behind a ceiling, has a suction port and a discharge port, and accommodates an indoor heat exchanger, a blower, and the like in a ventilation path between the suction port and the discharge port. A decorative panel configured as a lower surface portion of the main body; and a filter mounting portion detachably fitted to the decorative panel and detachably provided with a filter installed in a ventilation path between the suction port and the outlet. An operation cable for suspending and raising and lowering the filter mounting section to open and close the filter mounting section with respect to the decorative panel; and, when the filter mounting section closes the decorative panel with the operating cable, the filter is closed. An indoor unit for an air conditioner, comprising: an engaging portion that detachably engages and holds an attachment portion. 2. The latch according to claim 1, wherein said engaging portion holds said filter mounting portion by pressing and urging said filter mounting portion and releases said filter mounting portion by pressing again. The indoor unit of an air conditioner according to claim 1, wherein: 3. The indoor unit of an air conditioner according to claim 1, wherein the engaging portion is provided on the unit main body. 4. The air conditioner according to claim 1, wherein the number of the engagement portions is equal to the number of the operation cables used, and is provided near each of the hanging positions. Indoor unit of the machine. 5. A storage state detection switch provided adjacent to said engaging portion and detecting that said engaging portion is in a state of engaging and holding said filter mounting portion. The indoor unit of the air conditioner as described. 6. The motor according to claim 1, wherein the operating cable is driven forward to raise the operating cable to raise the filter mounting portion, and is driven to rotate in a reverse direction to lower the filter mounting portion to lower the filter mounting portion. From the state where the filter mounting portion has opened the decorative panel to the time when the storage state detection switch detects the state,
Means for controlling the motor to rotate forward to raise the filter line and raise the filter mounting portion, and after the detection of the storage state detection switch, control the motor to rotate in the reverse direction to pull down the filter line and lower the filter mounting portion. The indoor unit for an air conditioner according to claim 5, further comprising: 7. A state in which the engaging portion engages and holds the filter mounting portion, the motor is once driven to rotate forward to pull up the operating cable, raise the filter mounting portion, and press the latch body again. 7. The indoor unit for an air conditioner according to claim 6, further comprising means for controlling the motor to rotate in the reverse direction after the release, to lower the operation cable, and to lower the filter mounting portion. 8. The air conditioner indoor unit according to claim 6, further comprising a movement alarm device for issuing an alarm when said filter mounting portion is raised and lowered. 9. A unit main body which is disposed behind a ceiling, has an inlet and an outlet, and accommodates an indoor heat exchanger, a blower and the like in a ventilation path between the inlet and the outlet. A decorative panel configured as a lower surface portion of the main body; and a filter mounting portion detachably fitted to the decorative panel and detachably provided with a filter installed in a ventilation path between the suction port and the outlet. An operation cable for suspending and raising and lowering the filter mounting section to open and close the filter mounting section with respect to the decorative panel; and, when the filter mounting section closes the decorative panel with the operating cable, the filter is closed. An engagement portion for detachably engaging and holding the attachment portion; and an engagement portion connected to the operation cable, and the filter attachment portion is raised by driving the rotation cable forward to pull up the operation cable. A motor for lowering the filter mounting portion by driving the reverse rotation and pulling down the operation cable, wherein the engaging portion engages and holds the filter mounting portion by pressing and pressing, and A latch body for releasing the engagement with the filter mounting portion by applying a pressing force, and a storage state adjacent to the latch body for detecting that the latch body is in a state of engaging and holding the filter mounting portion. A detection switch is provided, and after the filter mounting portion is engaged with the engaging portion according to the operation of the filter lifting switch, the motor is once driven forward to pull up the filter mounting portion,
The motor is rotated in the reverse direction to lower the filter mounting section and stop.Then, when the filter raising / lowering switch is operated again, the motor is normally rotated from the state where the filter mounting section is opened until the storage detecting switch detects storage. A means for rotating and driving the filter mounting portion to raise the filter mounting portion, further raising the filter mounting portion after the detection, and then controlling the motor to rotate in a reverse direction to loosen the operating cable and to lower the filter mounting portion to stop. An indoor unit of an air conditioner characterized by the above. 10. The indoor unit of an air conditioner according to claim 9, further comprising means for issuing an alarm sound when the filter mounting portion is lowered, when the filter is raised, and immediately after the filter mounting portion is stopped. 11. The latch body constituting the engagement portion,
The storage state detection switch having a pressing stroke of a predetermined distance and being a limit switch for determining the storage state over the entire range of the pressing stroke from the start to the end of pressing the latch body. Item 10. An indoor unit for an air conditioner according to Item 9. 12. A distance in which the filter mounting portion is once pulled up by the motor from a state in which the filter mounting portion is engaged with the engaging portion is set to be longer than a pressing stroke of the latch body. Item 12. An indoor unit for an air conditioner according to Item 11. 13. A distance for pulling up the filter mounting portion after the storage state detecting switch detects storage of the filter mounting portion is set to be longer than a pressing stroke of the latch body. Indoor unit of air conditioner. 14. An abnormality which issues an abnormal alarm when the storage detecting switch does not detect storage of the filter mounting portion even when the filter mounting portion is raised by driving the motor forward for a predetermined time from the filter mounting portion opened state. The indoor unit for an air conditioner according to claim 11, further comprising an alarm device. 15. A descent distance setting means for controlling a descent distance of the filter mounting portion by an operation time of a motor and changing an operation time of the motor when the filter mounting portion is lowered. Item 12. An indoor unit for an air conditioner according to Item 11.