CN101517328A - Indoor unit for air conditioner - Google Patents

Abstract

The present invention provides a corner panel mounting and demounting mechanism (K) for mounting and demounting a corner panel (21) of a decorative panel (3) in and from an opening (20) of a panel body (3A). The mounting and demounting mechanism (K) comprises a rocking member (36) mounted on the panel body (3A) in a manner to rock on its intermediate portion and having a hooking pawl (41) at its one end portion and an operation screw hole (40) at its other end portion, an operation screw (44) screwed in the operation screw hole (40) for inclining, when turned in a predetermined direction, the rocking member (36), thereby to protrude the corner panel (21) at its end portion on the side of the hooking pawl (41) from the surface of the panel body (3A) and to make the same demountable, and an engagement hole (51) formed in the corner panel (21) for engaging with the hooking pawl (41), when the rocking member (36) is inversely inclined by turning the operation screw (44) backward, thereby to make the corner panel (21) flush with the panel body (3A) and not demountable.

Description

Indoor unit of air conditioning unit

technical field

The present invention relates to, for example, an indoor unit of a ceiling-embedded air conditioner, and particularly relates to an improvement in the attachment and detachment structure of the corner panels provided at the four corners of the decorative panel.

Background technique

The indoor unit of a general ceiling-mounted air conditioner is composed of a sheet metal case with an open lower portion substantially throughout its entire surface, and a heat insulating material assembled on the inner surface of the case to form the main body of the indoor unit. A heat exchanger, a blower, a drain pan, an electrical component box, and the like are arranged inside the main body of the indoor unit.

The opening of the lower part of the indoor unit main body is closed by a decorative panel having an air outlet and an air inlet. This decorative panel has a rectangular panel main body, and openings are provided at the four corners thereof, and the corner panels are fitted therein so as to be openable and closable. The above-mentioned opening is used for inserting tools necessary for adjusting the height position of the indoor unit main body.

That is, a suspension bolt is provided on the ceiling beam, and a hanger provided on the casing is hooked to a nut screwed into the suspension bolt to suspend the indoor unit. When adjusting the height of the indoor unit, a tool such as a socket wrench can be inserted from the opening toward the suspension bolt to perform nut operation, and the operation can be performed without removing the decorative panel.

For example, in the indoor unit of an air conditioner disclosed in Japanese Patent Application Laid-Open No. 2004-85002, a tongue portion having a threaded hole is provided at a corner of a corner panel, and a screw fixing portion is provided near a suction port of the panel body. Furthermore, a technique is disclosed in which the opening of the corner of the panel main body is closed by the corner panel by screwing the tongue part to the screw fixing part.

According to the above-mentioned Japanese Patent Application Laid-Open No. 2004-85002, when removing the corner panel in order to open the opening at the corner of the panel main body, it can be done as follows: After removing the fixing screw screwed into the threaded fixing part, the corner panel is placed on the decorative surface. The panel slides in the diagonal direction. That is, to ensure safety in such a way that the corner panel does not come off immediately after removing the fixing screws.

However, according to such a structure, the opening part and the corner part of a corner panel need to be provided in the position close to the corner part of an inlet. The area occupied by the corner panels on the decorative panel becomes large, and there are restrictions on design, and the opening area of the air outlet formed between the corner panels cannot be sufficiently large.

In addition, since the corner panels are detachable by sliding the corner panels, for example, if a fluorescent lamp exists in the sliding direction, it becomes an obstacle and the corner panels cannot be attached or detached. Furthermore, there is a problem that the indoor unit itself of the air conditioner cannot be installed.

Contents of the invention

Therefore, an object of the present invention is to provide an indoor unit of an air conditioner in which design options can be increased and corner panels can be attached and detached regardless of the installation location.

In order to achieve the above objects, the indoor unit of the air conditioner of the present invention is provided with: an indoor unit main body that is opened at the bottom and accommodates a heat exchanger, a drain pan, a blower, etc. inside; The above-mentioned decorative panel is provided with: a rectangular panel main body provided with a suction port in the central part and an air outlet in the peripheral part; openings provided at each corner of the panel main body; The corner panel of the part; and the corner panel mounting and dismounting mechanism for mounting and dismounting the corner panel to the opening of the panel main body; the above-mentioned corner panel mounting and dismounting mechanism has: a swing member, which is installed on the panel body freely swinging with the middle part as a fulcrum, One end has a hook claw, and the other end has an operating threaded hole; the operating screw is screwed into the operating threaded hole of the swinging part, and the swinging part is tilted by rotating in a specified direction, and the hooking claw is used to make the swinging part tilt. The end of the corner panel protrudes from the surface of the panel main body so as to be detachable; and the engaging hole provided on the corner panel engages with the hooking claw as the operating screw is rotated in the opposite direction to tilt the swinging member in the opposite direction. , so that the corner panel and the panel body become the same side and cannot be removed.

Description of drawings

Fig. 1 is a perspective view of an indoor unit of a ceiling-mounted air conditioner according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the main body of the indoor unit of the embodiment form.

Fig. 3 is a longitudinal sectional view of the main body of the indoor unit in this embodiment form.

Fig. 4 is an exploded perspective view of main parts of the corner panel attaching and detaching mechanism of the embodiment.

Fig. 5 is a perspective view of yet another main part of the corner panel attachment and detachment mechanism of the embodiment.

Fig. 6 is a perspective view of a state in which a corner panel is fitted into a panel body according to the embodiment.

Fig. 7 is a perspective view of the embodiment in a state where the panel main body is removed from Fig. 6 .

Fig. 8 is an enlarged perspective view of a part of Fig. 7 in the form of the embodiment.

Fig. 9 is a perspective view of the process of removing the corner panel from the panel main body in this embodiment form.

Fig. 10 is a perspective view of the embodiment with the panel main body removed from Fig. 9 .

Fig. 11 is an enlarged perspective view of a part of Fig. 10 in the form of the embodiment.

Fig. 12 is a partial sectional view of the panel main body and the suction grill in the form of this embodiment.

Fig. 13 is an enlarged sectional view of a part of Fig. 12 in this embodiment form.

Detailed ways

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view showing an indoor unit 1 of a ceiling-mounted air conditioner according to an embodiment of the present invention from below, FIG. 2 is an exploded perspective view of an indoor unit body 2, and FIG. 3 is a cross-sectional view of the indoor unit body 2.

The indoor unit 1 of the air conditioner includes: an indoor unit main body 2 inserted into an installation opening provided on a ceiling panel from the indoor side, and suspended and fixed on the so-called backside of the ceiling by hanging bolts or the like; and a decorative panel 3 installed on the ceiling. The lower part of the indoor unit main body 2 is exposed to the indoor side from the ceiling board.

The above-mentioned indoor unit main body 2 is provided with a sheet metal casing 4, and the bottom surface of the casing 4 is completely open, and the top surface and side surfaces are processed from a thin metal plate. On the inner peripheral surface of the casing 4, a heat insulating material 5 molded by foamed styrene material or the like is attached, and the indoor unit main body 2 has a heat insulating structure.

An air blower 6 is provided at a central portion inside the casing 4, and an indoor heat exchanger 7 integrally formed in a rectangular frame shape in plan view is attached to surround the air blower 6. As shown in FIG. In addition, as the indoor heat exchanger 7 , a heat exchanger including a pair of heat exchanger parts formed in an L-shape in plan view may be used. A drain pump 9 is attached to a corner of the indoor unit main body 2 .

The lower surface opening of the housing 4 is closed by the decorative panel 3 . The decorative panel 3 is, for example, molded from a synthetic resin material and finished beautifully, exposed from the ceiling panel to the room, and covers the gap between the peripheral surface of the indoor unit main body 2 and the installation opening of the ceiling panel.

The above-mentioned air blower 6 includes: a fan motor M fixed on the upper surface of the casing 4 by an appropriate method; and a fan F installed on the rotating shaft of the fan motor M. The above-mentioned fan F is a multi-blade fan, which plays the role of blowing air by sucking air from the direction of the rotating shaft and blowing it out in the circumferential direction as it rotates.

The indoor heat exchangers 7 are disposed facing each other in the circumferential direction, which is the direction in which the fan F blows out. The lower end of the indoor heat exchanger 7 is inserted into the square frame-shaped drain pan 10 provided on the housing 4 to receive the water drained by the heat exchange of the indoor heat exchanger 7 . The above-mentioned drain pump 9 is installed so as to be immersed in the drain water in the drain pan 10 .

A bell mouth 12 is provided between the decorative panel 3 and the blower fan F, and its periphery is surrounded by a drain pan 10 . The bell mouth 12 has: a horn-shaped constriction 12a with a small diameter on the fan F side of the blower and a large diameter on the decorative panel 3 side; a flat part 12b integrally arranged on the large diameter side of the constriction part 12a; Side slit portion 12c.

The electric component box 13 is attached to the flat part 12b of the said drain pan 10. As shown in FIG. The electrical component box 13 includes: a box body 14 having an open lower surface and accommodating a control board mounted with electrical components for control therein; Both the above-mentioned box body 14 and the cover plate 15 are made of sheet metal processed with thin metal plates.

A fan guard 16 is attached to the large-diameter side of the constricted portion 12 a of the bell mouth 12 . By providing the fan guard 16 , even in a state where the decorative panel 3 is removed for maintenance work, the hand does not directly touch the fan F constituting the air blower 6 , thereby ensuring safety.

The decorative panel 3 has a rectangular panel main body 3A, and a rectangular suction port 17 is opened at the center thereof. The suction port 17 is provided in an area and shape substantially opposite to the inner surface of the drain pan 10, and a suction grill 18 supporting a filter is detachably fitted therein.

The suction grill 18 allows indoor air to flow through the suction port 17 and at the same time shields the inside of the casing 4 from the suction port 17 . During maintenance, the filter can be removed together with the suction grill 18, and the filter and the suction grill 18 can be cleaned on the indoor floor.

Blowout ports 19 are provided along respective sides of the suction port 17 . Each outlet 19 is formed in an extremely elongated shape with respect to the lateral and longitudinal directions, and four outlets are provided. Each outlet 19 is provided to face the gap between the outer surface of the drain pan 10 and the heat insulating material 5 mounted on the inner surface of the case 4, and is formed by bending outward.

The louver R of the louver mechanism is attached to each air outlet 19, and the heat exchange air is blown out to a wide range around the decorative panel 3 and guided. Rectangular openings 20 for height adjustment are respectively provided at the four corners of the panel main body 3A, and corner panels 21 are detachably attached to the openings 20 for height adjustment.

The panel main body 3A and the corner panel 21 are molded from the same synthetic resin material, formed in the same color, and finished in the same state. A corner panel attachment and detachment mechanism K to be described later is provided across the back of the corner panel 21 and the back of the panel main body 3A to freely attach and detach the corner panel 21 to the height adjustment opening 20 .

On the other hand, the housing 4 is suspended by four suspension bolts suspended from beams constituting the rear surface of the ceiling. That is, a hanger 22A protruding outward in the horizontal direction is attached to a corner portion of the side surface of the housing 4, and a hanger bolt is inserted through the elongated hole d provided on the hanger 22A, and a nut is screwed to the inserted portion. the underside of the

Thereby, the hanger 22A is placed on the upper surface of the nut, and the casing 4 is hung by the hanger bolts at four places. In addition, the hanging height of the casing 4 can be adjusted by adjusting the threaded mounting position of the nut with respect to the hanging bolt. This operation is performed by removing the corner panel 21 and inserting a tool into the opening 20 for height adjustment.

The hanger 22A is formed by bending an upper end portion of a substantially U-shaped attachment body 22 attached to the casing 4 by spot welding or the like. The lower end of the fitting body 22 is bent to form an installation fitting 22B, which is used to install and fix the decorative panel 3 and the drain pan 10 on the housing 4 .

The first fitting 24 and the second fitting 25 are inserted into the above-mentioned drain pan 10, and a part of each is exposed. The first accessory 24 is used to install and fix the drain pan 10 on the housing 4 , and the second accessory 25 is used to install the bell mouth 12 and the electrical component box 13 on the drain pan 10 .

In the indoor unit 1 of the ceiling-mounted air conditioner configured in this way, the blower 6 is driven to suck indoor air to the suction port 17 through the suction grill 18 and the filter. Then, it is guided by the bell mouth 12, sucked in from the rotation axis direction of the air blower 6, and blows out in the circumferential direction.

The indoor airflow blown out in the circumferential direction passes through the indoor heat exchanger 7 to exchange heat, becomes cold air during cooling operation, and becomes warm air during heating operation. This heat exchange air is guided along the gap between the indoor heat exchanger 7 and the heat insulating material 5 , and is blown out into the room from a plurality of outlets 19 formed on the decorative panel 3 .

Therefore, heat-exchanging air can be uniformly blown into the room from the indoor unit 1 of the air conditioner installed on the ceiling plate, and the air-conditioning effect on the room can be effectively exhibited.

Next, the above-mentioned gusset panel attachment and detachment mechanism K will be described in detail.

Fig. 4 is an exploded perspective view of a part of the corner panel attaching and dismounting mechanism K, and Fig. 5 is a perspective view of a part of the corner panel attaching and dismounting mechanism K, and each drawing is upside down and shows that the indoor unit 1 is suspended by the hanging bolts. hold status.

The panel main body 3A constituting the above-mentioned decorative panel 3 has: an exposed surface a (as shown in FIG. 1 ), which is exposed indoors, is provided with an opening 20 for height adjustment at a corner and is fitted with a corner panel 21; The exposed surfaces a face each other with a predetermined interval, and a corner panel attaching and detaching mechanism K is attached.

The above-mentioned corner panel attaching and detaching mechanism K has a corner base 30 attached to and fixed to the base surface so that a part protrudes toward the corner of the suction port 17 . A swing member housing portion 31 is integrally formed on the corner base 30 , one end protrudes from the corner of the suction port 17 , and the other end straddles the position facing the corner of the height adjustment opening 20 .

The swing member housing portion 31 has a rectangular shape in a plan view, and is formed in a concave shape with vertical walls on both sides in the lateral and longitudinal directions. A threaded fixing portion 32 is integrally protruded from the substantially central position of the bottom surface, which includes: a raised portion 32a provided with a threaded hole e along the axis; It is a semicircular support portion 32b.

An attachment boss 33 is provided at a position at a predetermined distance from the screw fixing portion 32 to the height adjustment opening 20 side of the swing member housing portion 31 . The mounting bosses 33 are used to insert mounting screws for mounting the corner base 30 to the panel main body 3A, and are not related to the function of the corner panel attaching and detaching mechanism K described later.

A screw operating portion 35 is integrally formed on the vertical wall f forming the suction port 17 side of the swing member housing portion 31 . The screw operation part 35 is provided so as to straddle the vertical walls on both sides in the horizontal direction and the vertical wall f on the side of the suction port 17 on one side in the longitudinal direction. gap.

A boss 35a having a hole g for screw insertion is provided on the screw operation part 35 along the axis. The said hole g for screw insertion is provided so that the upper and lower end surfaces of the boss|hub part 35a may pass through. On the other hand, on the other side in the longitudinal direction of the swinging member accommodating portion 31 opposite to the screw operating portion 35 , not only is no member provided, but the upper side of the vertical wall h forming the end face is notched.

A swing member 36 is accommodated in such a swing member housing portion 31 . The lateral dimension and the longitudinal dimension of the swing member 36 are designed so as to fit into the swing member accommodating portion 31 with a margin. In particular, the end portion on the side of the suction port 17 can be inserted into the gap between the bottom surface of the swing member housing portion 31 and the bottom surface of the screw operation portion 35 .

An elliptical fixing threaded hole 37 is provided substantially in the middle of the swing member housing portion 31 along the longitudinal direction, and semicircular fulcrum ribs 36a are provided on both sides of the fixing threaded hole 37 . The fulcrum rib 36 a is provided along the length direction of the swing member housing portion 31 and coincides with the semicircular direction of the support portion 32 b forming the fixing boss portion 32 of the swing member housing portion 31 .

At a position at a predetermined distance from the fixing screw hole 37 to the height adjustment opening 20 side, an elongated protrusion avoidance hole 38 is provided in the longitudinal direction. The protrusion avoidance hole 38 is for inserting the mounting protrusion 33 when the swing member 36 is installed in the swing member receiving portion 31, so that the protrusion 33 does not restrict the swinging motion of the swing member 36. .

An operation screw hole 40 is provided at one end portion of the swing member 36 . By inserting one end of the swinging member 36 into the gap between the bottom surface of the swinging member receiving portion 31 and the lower surface of the screw operating portion 35, and adjusting the position of the swinging member 36, the operating threaded hole 40 is positioned at the same position as the above-mentioned screw operating position. The screw on the part 35 is inserted into the position communicating with the hole g.

A hook piece 42 having a hook claw 41 is integrally formed on the other end portion of the swing member 36 . The hook piece 42 protrudes upward from the vertical wall at the end of the swing member 36, and a pair of reinforcing ribs 36b are provided on the inner side thereof. The above-mentioned hooking claw 41 is provided along the upper end portion of the hooking piece 42 and protrudes outward from the end surface of the swing member 36 , that is, from the side of the height adjustment opening 20 .

In addition, as the gusset panel attachment and detachment mechanism K, the operation screw 44 is screwed into the operation threaded hole 40 of the swing member 36 through the screw insertion hole g of the screw operation part 35 on the basis of the fitting washer 43, respectively. and the fixing screw 46, on the basis of the fitting washer 45, is screwed with the threaded hole e of the screw fixing part 32 provided on the swing member housing part 31.

In addition, a screw retainer 48 is required which fits into the vertical wall f forming the swing member 36 and the screw operation portion 35 and is bent into a substantially U-shape. The upper bent piece of the screw presser 48 serves as a pressing portion 48a, and a concave notch 49 is provided from the front end edge of the pressing portion 48a to the vicinity of the bent portion.

Furthermore, as shown in FIG. 5 , a locking piece 50 integrally provided on the underside of the corner of the corner panel 21 facing the corner of the suction port 17 is required. Engagement holes 51 capable of engaging with hook claws 41 provided on the swing member 36 are provided in the locking pieces 50 . Furthermore, a pair of ribs 52 are formed between the upper end of the engaging hole 51 and the lower surface of the corner panel 21 .

The corner panel attachment and detachment mechanism K constructed in this way is assembled as follows.

First, the end portion of the swing member 36 on the side of the operation screw hole 40 is inserted into the gap between the swing member accommodating portion 31 and the screw operation portion 35 . Thereby, the protrusion part 32a of the screw fixing part 32 is inserted into the screw hole 37 for fixing, and the protrusion part 32a protrudes in the swing member 36. As shown in FIG. The swing member 36 is placed on the support portion 32b, and the protrusion avoidance hole 38 is inserted into the protrusion portion 33 for attachment.

Finely adjust the position of the swing member 36 so that the operation screw hole 40 is correctly aligned with the screw insertion hole g of the screw operation part 35, and the operation screw 44 fitted with the washer 43 is connected to the operation thread through the screw insertion hole g. The holes 40 are screwed together. Therefore, the washer 43 is placed on the upper end surface of the boss portion 35a, and one end portion of the swing member 36 is raised.

If the operating screw 40 is directly tightened, one end portion of the swing member 36 is in close contact with the lower surface of the screw operating portion 35 , but the operating screw 40 is loosely tightened during assembly. One end portion of the swing member 36 is freely displaceable in the vertical direction between the bottom surface of the swing member housing portion 31 and the lower surface of the screw operation portion 35 .

In this state, the substantially central portion of the bottom surface of the swing member 36 is placed on the support portion 32b. Therefore, using this portion as a fulcrum, both end portions of the swing member 36 can freely swing in a so-called seesaw shape. Then, after fitting the washer 45 to the fixing screw 46 , the fixing screw 46 is screwed into the threaded hole e provided in the boss portion 32 a of the swing member accommodating portion 31 .

A washer 45 is placed on the upper end surface of the boss 32a. When the fixing screw 46 is tightened, the washer 45 is fixed between the head of the fixing screw 46 and the boss 32a. In this state, there is a slight gap between the uppermost end of the fulcrum rib 36a and the washer 45, and the swing member 36 can be displaced between the washer 45 and the support portion 32b.

Finally, the screw retainer 48 is fitted into the vertical wall f formed by the swing member accommodating portion 31 and the screw operating portion 35 . The concave cutout portion 49 provided on the pressing portion 48 a of the screw pressing member 48 sandwiches the head of the operating screw 44 from left and right, and the pressing portion 48 a is placed on the washer 43 . As a result, the screw presser 48 is pressed into the operation screw 44 together with the vertical wall f.

The vertical movement of the operation screw 44 is restricted by the screw presser 48 , so that the operation screw 33 itself cannot advance or retreat even if the operation screw 44 is rotated. Instead, one end portion of the swing member 36 having the operation screw hole 40 screwed into the operation screw 44 advances and retreats according to the rotation direction of the operation screw 44 .

That is, when the operation screw 44 is rotated in the tightening direction, the swing member 36 uses the support portion 32b as a fulcrum, one end provided with the operation screw hole 40 rises, and the other end provided with the hook piece 42 descends. Conversely, when the operation screw 44 is turned in the loosening direction, one end portion of the swing member 36 descends and the other end portion ascends, forming a seesaw shape.

Next, the function of the above-mentioned gusset panel attachment and detachment mechanism K will be described.

6 is a partial perspective view of the state where the corner panel 21 is attached to the panel body 3A, FIG. 7 is a view showing the panel body 3A removed from FIG. 6 , FIG. 8 is a partially enlarged view of FIG. 7 , and FIG. 9 is a corner panel 10 is a view showing that the panel main body 3A is removed from FIG. 9 , and FIG. 11 is a partially enlarged view of FIG. 10 .

All the drawings show the vertical direction opposite to the actual suspended state of the indoor unit 1, and the description will be based on the state of each drawing to avoid confusion. Therefore, in fact, the operation up and down of the description is performed.

As shown in FIG. 6, when the suction grille 18 is removed from the panel main body 3A to expose the suction port 17, the screw operation part 35, which is a part of the corner panel attachment and detachment mechanism K, protrudes from the corner of the suction port 17 and can be seen. . Specifically, as shown in FIG. 7 , the head of the operation screw 44 clamped on the left and right by the pressing portion 48 a of the screw pressing member 48 and the concave notch portion 49 is exposed.

As shown in FIG. 7 , a first protruding portion 55 is provided at a corner portion (hereinafter referred to as “first corner portion”) of the corner panel 21 on the diagonal line of the corner portion where the locking piece 42 is provided. Second protrusions 56 are provided on the remaining two corners formed on the peripheral side of the panel main body 3A (hereinafter referred to as “second corners”).

Holes are provided in the corner peripheral walls of the height adjustment opening 20 facing the first and second corners where the first and second protrusions 55 and 56 are provided. By connecting all the first and second protrusions 55 and 56 to the hole, the corner panel 21 completely closes the height adjustment opening 20 as shown in FIG. 6 .

When attaching the corner panel 21 to the height adjustment opening 20 of the panel main body 3A, the following operations are performed.

As shown in FIG. 9 , the first protrusion 55 at the first corner of the corner panel 21 is inserted into the hole on the peripheral wall of the height adjustment opening 20 . Afterwards, when the corner panel 21 is pressed in the direction of fitting the height adjustment opening 20, as shown in FIG. 5 and FIGS. Further compressions are limited. At this time, the hooking claw 41 engages with the engaging hole 51 shallowly.

The corner panel 21 is in a posture inclined with respect to the panel main body 3A, and the second protrusion 56 is raised from the panel main body 3A so as to be visible. Furthermore, the rib 52 and part of the locking piece 50 of the corner panel 21 , and part of the hooking piece 42 and the hooking claw 41 form a gap visible from between the panel main body 3A and the corner panel 21 .

Thereafter, the tool is aligned with the operation screw 44 exposed at the corner of the suction port 17, and the operation screw 44 is rotated in the tightening direction.

Then, the forward and backward movement of the operation screw 44 is restricted by the screw pusher 48 , while the swing member 36 having the threaded hole 40 screwed into the operation screw 44 is biased to swing. The swing member 36 is inclined so that the end portion of the swing member 36 on the side of the screw hole 40 is raised to approach the bottom surface of the screw operation portion 35 , and the hook piece 42 is close to the bottom surface of the swing member accommodating portion 31 .

The hooking claw 41 is lowered integrally with the hooking piece 42 while being engaged with the engaging hole 51 , and the locking piece 50 and the corner of the corner panel 21 are pulled in toward the height adjustment opening 20 . Then, when the tightening operation of the operation screw 44 is continued, the hook claw 41 enters deeply into the engaging hole 51 , and the corner panel 21 is securely locked.

Then, as shown in FIGS. 6 to 8 , the corner panel 21 is completely fitted into the height adjustment opening 20 , and the second protrusion 56 of the corner panel 21 engages with the hole on the peripheral wall of the height adjustment opening 20 . The corner panel 21 is securely fixed to the same surface as the panel body 3A, and the corner panel 21 cannot be detached from the panel body 3A surface.

When detaching the corner panel 21 from the panel main body 3A as needed, it carries out as follows.

First, as shown in FIG. 6, the suction port 17 is opened, and the screw operation part 35 of the corner panel attaching and detaching mechanism K is exposed at the corner. At this time, a tool is aligned with the operation screw 44 and the operation screw 44 is rotated in the loosening direction. The swing member 36 swings, the end portion on the operation screw hole 40 side is pulled down, and the end portion on the hook piece 42 side is pulled up toward the height adjustment opening portion 20 side.

Accordingly, the hooking claw 41 moves the locking piece 50 upward through the engaging hole 51 , and the second corner portion of the corner panel 21 is lifted in a direction away from the surface of the panel main body 3A. The corner panel 21 is tilted so that a part protrudes from the panel main body 3A, and the second protrusion 56 protrudes from the hole. The first protrusion 55 of the first corner remains engaged with the hole.

When the rotation operation of the operation screw 44 is continued, as shown in FIGS. 9 to 11 , the swing member 36 inclines to the maximum, and the engagement of the hook claw 41 with the engagement hole 51 becomes shallow. Even in this state, the first protrusion 55 is engaged with the hole, and a part of the gusset panel 21 comes out from the height adjustment opening 20 to assume an inclined posture.

That is, the corner panel 21 is supported with only a slight locking force with respect to the panel main body 3A. When the corner panel 21 is pulled away from the main body 3A, the engaging hole 51 comes out from the hooking claw 41 and the first protrusion 55 comes out from the hole, so that the corner panel 21 can be removed from the panel main body 3A.

The work described above is actually performed while looking up at the decorative panel 3 exposed from the ceiling board, and therefore, the operation of the operation screw 44 is also performed while looking up. At this time, since the operation screw 44 is pressed by the screw pressing member 48, it does not come off during work, and the workability is good. Of course, the swing member 36 and other constituent members do not fall off.

By adopting the above-mentioned corner panel attaching and detaching mechanism K, the corner panel can be attached and detached without moving the corner panel along the diagonal line as in the past, so that workability is improved and design options are increased.

In addition, when the tongue portion is provided on the gusset panel and screwed as conventionally, the tongue portion cannot be lengthened due to a problem of strength. Therefore, the bridging portion between the height-adjusting opening of the panel body and the suction port cannot be set wide, which is disadvantageous in terms of design and strength of the panel body.

On the other hand, if the above-mentioned corner panel attachment and detachment mechanism K is adopted, the bridging portion between the height adjustment opening 20 of the panel main body 3A and the suction port 17 can be set wider, which is beneficial to increase the width of the panel main body 3A. strength.

Next, the relationship between the suction grill 18 attached to the suction port 17 of the decorative panel 3 and the panel main body 3A will be described.

12 is a perspective view showing a cross section from the suction grill 18 to the air outlet 19 of the decorative panel 3, and FIG. 13 is a partially enlarged view showing the actual indoor unit 1 in a suspended state.

On the surface side of the panel main body 3A of the suction port 17, a stepped portion 60 curved outward from the peripheral surface is provided along the peripheral edge. In the suction grill 18, an extending portion 18a is integrally formed protruding outward along the peripheral edge on the surface side. In a state where the suction grill 18 is fitted into the suction port 17, the extension portion 18a of the suction grill 18 is inserted into the stepped portion 60 of the panel main body 3A.

Thereby, the extension part 18a covers the gap between the suction port 17 and the suction grill 18 in the state which looked upward at the suction grill 18. As shown in FIG. Only the step difference of the stepped portion 60 can be felt at the joint between the suction grill 18 and the panel main body 3A, and the suction grill 18 has an impression of being extremely thin in appearance, thereby improving appearance.

Essentially, the gap between the suction port 17 and the suction grill 18 is narrowed, making it difficult to suck air through the gap. That is, the amount of air that does not pass through the filter attached to the suction grill 18 is reduced, and the dust capture efficiency of the filter can be improved.

In addition, the present invention is not limited to the above-mentioned embodiment itself, and the constituent elements can be changed and embodied within the range not departing from the spirit of the invention at the stage of implementation. Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments.

Industrial Applicability

According to the present invention, the choice of design can be increased, and the corner panel can be attached and detached regardless of the installation location.

Claims (2)

1. An indoor unit of an air conditioner, characterized in that it has: the main body of the indoor unit, which is open below and accommodates a heat exchanger, a drain pan, a blower, etc. inside; and The decorative panel closes the opening under the main body of the indoor unit and is exposed to the room, The above decorative panel has: The rectangular panel main body is provided with a suction port at the central part, and a blowing port is provided at the peripheral part of the suction port; openings are arranged at each corner of the panel body; a corner panel fitted into the opening freely openable and closable; and The corner panel attaching and dismounting mechanism attaches and detaches the corner panel to the opening of the above-mentioned panel main body, The installation and disassembly mechanism of the above-mentioned corner panel has: The swing member is mounted on the above-mentioned panel body freely swinging with the middle part as a fulcrum, has a hook claw on one end, and has an operation threaded hole on the other end; The operating screw is screwed into the above-mentioned operation threaded hole of the swinging member, and the swinging member is tilted as it is rotated in a predetermined direction, and the end of the corner panel protrudes from the surface of the panel main body through the hooking claw to be removed; and, The engaging hole is provided on the above-mentioned corner panel, and the swing member is tilted in the opposite direction as the above-mentioned operating screw is rotated in the opposite direction. and cannot be removed. 2. The indoor unit of the air conditioner according to claim 1, characterized in that: The forward and backward movement of the operation screw itself is restricted.

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