CN113646591A

CN113646591A - Ceiling embedded air conditioner

Info

Publication number: CN113646591A
Application number: CN202080006588.5A
Authority: CN
Inventors: 新井田秀作
Original assignee: Hitachi Johnson Controls Air Conditioning Inc
Current assignee: Hitachi Johnson Controls Air Conditioning Inc
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-11-12
Anticipated expiration: 2040-02-27
Also published as: CN113646591B; JP7086283B2; WO2021171503A1; JPWO2021171503A1; EP4148336A4; EP4148336A1

Abstract

The invention provides a ceiling-mounted embedded air conditioner. The ceiling-mounted embedded air conditioner of the present invention comprises: an indoor unit (100) provided with a fan (105), a fan motor (106), and a heat exchanger (103); a decorative panel (107) that is attached to the indoor unit (100) so as to face the air-conditioning space; and a grille (109) attached to the decorative panel (107). The grill (109) extends to a position adjacent to an air outlet (108) formed in the decorative panel (107), and at least one end of the grill (109) is provided with a dummy grill (109a) that is separate from the grill (109) and adjacent to the air outlet (108).

Description

Ceiling embedded air conditioner

Technical Field

The present invention relates to an air conditioner, and more particularly, to a ceiling-embedded air conditioner including a decorative panel mounted on a lower portion of the ceiling-embedded air conditioner.

Background

In recent years, with the increasing demand for inexpensive construction of high-rise buildings, there has been an increasing demand for ceiling box type air conditioners that do not require duct work. In order to meet this desire, decorative panels have been proposed in terms of design that bear the duct-type unit and the existing ceiling box-type intermediate member.

From the viewpoint of design, a decorative panel of a ceiling-embedded air conditioner preferably has a structure in which a suction grille is enlarged to the vicinity of an air outlet provided in the outer peripheral portion of the decorative panel. On the other hand, in order to prevent dew condensation and the like from occurring due to the blowing of the conditioned air, it is necessary to provide a heat insulating material having a predetermined thickness or more around the blowing port.

Fig. 8 shows a schematic configuration of an indoor unit 800 of a conventional ceiling-embedded air conditioner. In the conventional indoor unit 800, a decorative panel 801 provided adjacent to a ceiling (not shown) is disposed on the indoor side. An air outlet 802 is formed in the interior of the decorative panel 801, and an air direction plate 806 is disposed in the interior of the air outlet 802 via an appropriate pivot mechanism 807 and a drive mechanism. Further, a heat exchanger 810 and a leak receiver 811 are disposed in the main body 809 of the indoor unit 800. The heat exchanger 810 exchanges heat between a heat exchange medium sent from an outdoor unit (not shown) and indoor air. The conditioned air after heat exchange is ejected from the air outlet 802 into the room, and the air conditioning in the room is performed. A drain pan 811 is disposed below the heat exchanger 810 to receive drain from the heat exchanger 810.

Heat insulating materials 805 for preventing dew condensation are arranged on both sides of the blowing port 802, and the suction grill 803 extends to the vicinity of the heat insulating material 805 on the inside. The suction grill 803 includes an opening for introducing indoor air into the indoor unit 800, and a filter (not shown) is placed on the indoor unit 800 side of the suction grill 803.

The suction grill 803 needs to be opened and closed for the reason of cleaning and replacement of a filter or maintenance of the indoor unit 800, and in the conventional decorative panel 801, a hinge 808 that engages with the decorative panel 801 is disposed at an end of the suction grill 803. In response to a request for maintenance or the like, the knob disposed near the right-hand end of the suction grill 803 on the paper surface is operated to release the connection with the decorative panel 801. When the hinge 808 is rotated with respect to the decorative panel 801 by the operation of the operator, the suction grill 803 is rotated clockwise toward the lower side of the paper.

When the suction grill 803 is intended to be expanded to the vicinity of the outlet 802 in the configuration of fig. 8, it is difficult to secure a space for providing the hinge 808 serving as a shaft for opening and closing due to the volume of the heat insulating material 805. Therefore, with a simple structure, there is a problem that the opening and closing operation of the suction grill 803 cannot be performed. From this viewpoint, the region 804 formed between the air outlet 802 and the suction grill 803 can be said to be a region in which the design is deteriorated from the design of the indoor side of the decorative panel 801, and there is room for effective utilization by improvement of the hinge structure.

Further, if the suction grill 803 is expanded to the vicinity of the outlet 802, the suction grill 803 becomes larger than a conventional suction grill, and as a result, the weight of the suction grill 803 increases, and when the same configuration is adopted for a decorative panel with an elevating grill, there is a possibility that the output of the suction grill elevating motor will be insufficient.

Conventionally, various configurations have been studied for performing work inside an indoor unit, and for example, in WO2018/179136 pamphlet (patent document 1), for the purpose of improving workability inside an indoor unit, there is described a ceiling-embedded air conditioner including a suction grill provided on an appearance side of a decorative panel and left and right side panels provided on the suction grill, in which the side panel detachably attached to the decorative panel can be detached by the suction grill that is rotated and opened in a state where the decorative panel is attached to a main body.

The indoor unit described in patent document 1 can improve accessibility of the inside of the indoor unit, but adds a side panel that is not related to design, and conversely, reduces the design of the indoor unit. Further, the intake grill is not extended to the vicinity of the outlet to improve the design.

Further, japanese patent application laid-open No. 2-171526 (patent document 2) describes a composite air conditioner in which a side grill is provided at one end of a front grill. However, patent document 2 does not aim to improve the design of the indoor unit of the ceiling-embedded air conditioner.

Documents of the prior art

Patent document

Patent document 1: international publication WO2018/179136 pamphlet

Patent document 2: japanese laid-open patent publication No. 2-171526

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a ceiling-embedded air conditioner having a structure of a suction grill which is easily opened and closed by viewing the suction grill over a wide range, and which is lightweight despite an increase in the area of the suction grill.

Means for solving the problems

That is, according to the present invention, there is provided a ceiling-embedded air conditioner including an indoor unit including a fan, a fan motor, and a heat exchanger,

the indoor unit includes:

a decorative panel which is installed facing the air conditioning space and has a suction port and a blowing port; and

a grille mounted on the decorative panel,

the grill includes a suction grill provided at the suction port, and a dummy grill extending from at least one end of the suction grill and provided between the suction port and the discharge port.

The effects of the invention are as follows.

According to the present invention, a ceiling-embedded air conditioner having a suction grille structure with improved design can be provided.

Drawings

Fig. 1 is a schematic sectional view of an indoor unit 100 according to an exemplary embodiment.

Fig. 2 is a diagram showing an exemplary form 200 in which the suction grill 109b of the indoor unit 100 is opened in the exemplary embodiment.

Fig. 3 is a view showing a suction grill structure 300 when the indoor unit 100 of the exemplary embodiment is viewed from the indoor side.

Fig. 4 is an enlarged view showing an inside configuration 400 of the decorative panel 107 in the direction along arrow C-C of fig. 1.

Fig. 5 is a schematic view of the inner structure 500 in a case where the suction grill 109b is opened for maintenance or the like.

Fig. 6 is an enlarged view of the internal structure 600 in which the end portion corresponding to the decorative panel 107 shown in fig. 4 and 5 is enlarged in the direction of the cutting line D-D in fig. 1.

Fig. 7 is a diagram showing an exemplary modification.

Fig. 8 is a diagram showing an edge structure of an indoor unit 800 of a conventional ceiling-embedded air conditioner.

Detailed Description

The present invention will be described below with reference to exemplary embodiments, but the present invention is not limited to the embodiments described below. The drawings are used for easy understanding of the present invention and are not to be construed as being added for limiting the present invention. In addition, the terms "near", "near" or "adjacent" are used in the ordinary sense that those skilled in the art understand "near", "near" or "adjacent", and do not necessarily mean actual contact.

Fig. 1 shows a schematic cross-sectional view of an indoor unit 100 according to an exemplary embodiment. An indoor unit 100 shown in fig. 1 is an indoor unit 100 of a ceiling-embedded air conditioner, and a heat exchanger 103, a fan 105, and a fan motor 106 for driving the fan 105 are housed in a casing 102 of the indoor unit 100. The indoor air is sucked in the direction of arrow a, flows toward heat exchanger 103 along with the airflow generated by fan 105, and then exchanges heat with the heat exchange medium circulating in heat exchanger 103.

The conditioned air after heat exchange is discharged from the air outlet 108 in the direction of arrow B into a room as an exemplary air-conditioned space. A dew receiving pan 104 is disposed below the heat exchanger 103 to collect drain water, dirt, and the like of the heat exchanger 103.

A decorative panel 107 is provided on the indoor side of the cabinet 102. A grill 109 is detachably provided on the indoor side of the decorative panel 107. The grill 109 is composed of a dummy grill 109a and a suction grill 109b arranged at least one end portion. In order to improve the design of the indoor side of the indoor unit 100, the dummy grill 109a of the grill 109 extends adjacent to the air outlet 108.

In a preferred embodiment of the present disclosure, adjacent to the air outlet 108 means: in the area between the outlet 108 and the intake grill 109b, the dummy grill 109a extends from the end of the intake grill 109b with a width of at least 1/2 or more, which has a width between the outlet 108 and the intake grill 109 b. The dummy grid 109a is detachably fixed to the decorative panel 107, and may be fixed to a position rotated by, for example, 90 ° with respect to the decorative panel 107 in the mounting direction.

One end of the suction grill 109b is coupled to one dummy grill 109a via a hinge mechanism, and the opposite end is coupled to the decorative panel 107 via a latch mechanism. The suction grill 109b is fixed to the decorative panel 107 by the dummy grill 109a and the latch mechanism. The suction grill 109b and the dummy grills 109a disposed at both ends thereof increase the area of the grill 109 and reduce the weight of the suction grill 109 b. Therefore, in the exemplary embodiment, the design of the indoor unit 100 can be improved, and the weight of the movable portion of the grill 109 can be reduced to improve the operability.

An air outlet 108 is formed in an outer edge portion of the grille 109 of the decorative panel 107. In order to prevent dew condensation and the like, a heat insulator 110 is disposed at the inner end and the outer end of the air outlet 108. The conditioned air is blown out from the air outlet 108 in the direction of arrow B, and the air conditioning of the room is realized.

In the present exemplary embodiment, when the indoor unit 100 shown in fig. 1 is subjected to filter replacement, cleaning, inspection, or part replacement, the interior of the air conditioner 100 can be accessed by rotating the suction grill 109b of the grill 109 clockwise toward the lower side of the sheet to expose the interior of the indoor unit 100.

Fig. 2 shows an exemplary form 200 in which the suction grill 109b of the indoor unit 100 is opened in the exemplary embodiment. One end of the suction grill 109b is engaged with the dummy grill 109a via a hinge mechanism, and the other end is held by the decorative panel 107 by a latch mechanism. In the exemplary embodiment shown in fig. 2, when the suction grill 109b is to be opened, the latch mechanism disposed on the right side of the drawing sheet is released, one end of the suction grill 109b is opened, and the operator rotates the suction grill 109b to the lower side of the drawing sheet while holding the movable end of the suction grill 109 b.

A suspension wire 109c having one end fixed to the decorative panel 107 is coupled to a center portion of the suction grill 109b, and the suction grill 109b is held by the suspension wire 109c after being rotated to a range allowed by the suspension wire 109 c.

On the other hand, in the exemplary embodiment shown in fig. 2, the end portion on the left side of the paper surface of the suction grill 109b is rotatably connected to the dummy grill 109a via a hinge mechanism. The suction grill 109b is rotated via the hinge mechanism of the dummy grill 109a in accordance with the lowering of the right end thereof, and the suction grill 109b can be rotated and moved.

Fig. 3 shows a suction grill structure 300 when the indoor unit 100 of the exemplary embodiment is viewed from the indoor side. As shown in fig. 3, the grill 109 includes a suction grill 109b and dummy grills 109a disposed at both ends of the suction grill 109 b. The grill 109 has a substantially square shape when viewed from the bottom of the room, and is enlarged to a position adjacent to the air outlets 108 formed at the four-directional edges of the decorative panel 107.

Therefore, in the illustrated exemplary embodiment, the suction grill 109b disposed in the center of the grill 109 is formed in a rectangular shape having a long side in the horizontal direction of the drawing sheet. In the exemplary embodiment shown in fig. 3, latch mechanisms 115 are formed at both end portions on the short sides of the suction grill 109 b. The latch mechanism 115 fixes the suction grill 109b to the decorative panel 107. Therefore, the area of the suction grill 109b is smaller than the apparent area of the grill 109, and the weight is reduced to improve the operability. The dummy louver 109a is detachable from the decorative panel 107, and can cope with a change in the extending direction of the louvers of the louver 109 with respect to the decorative panel 107. In response to this, the opening/closing direction of the suction grill 109b can be changed, thereby improving workability and maintainability.

Fig. 4 is an enlarged view showing an inside configuration 400 of the decorative panel 107 in a case where the decorative panel 107 is cut in a direction parallel to the paper plane at the position of arrow C-C in fig. 1. The exemplary embodiment shown in fig. 4 corresponds to forming the end of the hinge mechanism. As shown in fig. 4, an air outlet 108 is formed inside the decorative panel 107, and an air flow direction plate 112 is movably held inside the air outlet 108 by a drive mechanism, not shown, via a pivot mechanism 113, and controls the direction of conditioned air blown out into the room.

Heat insulating materials 110 are disposed on both sides of the outlet 108, and condensation and the like near the outlet 108 are prevented. In the present embodiment, the dummy grill 109a is provided between the outlet 108 and the suction grill 109b in an area existing as a space in which design is deteriorated in the related art, thereby improving the design of the indoor side of the indoor unit 100 and improving the operability during maintenance.

Further, a filter 111 is placed on the suction grill 109b on the side of the indoor unit 100, and louvers extending in parallel to the louver structure of the dummy grill 109a are formed on the indoor side of the grill 109, thereby improving the sense of unity between the dummy grill 109a and the suction grill 109 b.

The dummy grill 109a of the present embodiment is disposed so as to extend inward from a position close to the outlet 108, and the inner end thereof extends to the end of the suction grill 109 b. On the other hand, a hinge 114 that engages with the inner end of the dummy grill 109a is formed at the outer end of the suction grill 109b, and the suction grill 109b is held so as to be rotatable around the dummy grill 109a in cooperation with a hinge receiving portion 114d formed in the dummy grill 109 a.

In addition, in the hinge 114 of the present exemplary embodiment, the hinge 114 includes a U-shaped structure having a substantially U-shaped cross section, the U-shaped structure including: a front end portion 114a extending in a bent manner toward the indoor side above the dummy grating 109 a; a base 114b extending from an end surface of the suction grill 109b toward the indoor unit; and a coupling portion 114c that couples the distal end portion 114a and the base portion 114 b.

In the hinge 114 of the exemplary embodiment, a second U-shaped structure having the same shape is also arranged on the front side of the sheet of fig. 4, and the two U-shaped structures in a pair are connected to each other at the front end 114a in the direction perpendicular to the sheet. The paired U-shaped structures are perpendicular to the paper surface via the base 114b, and a small hole (not shown) for accommodating the hinge stopper 114e is formed between the two U-shaped structures.

On the other hand, the dummy grill 109a is formed with a hinge receiving portion 114d for receiving the tip end portion 114a of the hinge 114, and a hinge stopper 114e is formed at the end portion on the suction grill 109b side. The hinge 114 accommodates a hinge stopper 114e between the small holes and is movable in the right and left directions on the paper. Further, a beam structure integrally formed with the decorative panel 107 extends in the direction perpendicular to the paper surface at the upper portion of the hinge 114, and the amount of movement of the hinge 114 in the up-down direction of the paper surface is restricted.

Fig. 5 shows a schematic view of the inner structure 500 in a case where the suction grill 109b is opened for maintenance or the like. In this case, the suction grill 109b can be rotated by releasing a latch mechanism formed at the end portion on the opposite side. When the suction grill 109b is to be moved, the hinge 114 is pulled out to the right-hand side of the drawing sheet in a nearly horizontal arrangement, and the suction grill 109b is pulled out laterally until the front end 114a of the hinge 114 and the surface of the hinge receiving portion 114d facing each other are adjacent to each other.

When the other end of the suction grill 109b, not shown, moves downward in the drawing, the suction grill 109b rotates clockwise with the tip end 114a as a fulcrum, and the suction grill 109b can rotate. Then, in a state where the suction grill 109b is rotated to a predetermined position, the suction grill 109b is lifted upward on the paper surface, so that the engagement between the small hole formed in the hinge 114 and the hinge stopper 114e is released, and the suction grill 109b is detached from the decorative panel 107. With the above configuration, the suction grill 109b is configured to be detachable from the decorative panel 107.

In the state shown in fig. 2 or the state in which the suction grill 109b is removed, the operator accesses the inside of the indoor unit 100, and performs maintenance and inspection of the internal elements of the indoor unit 100 in addition to replacement and cleaning of the filter 111. Although the entire area of the grill 109 is increased, the weight of the suction grill 109b is reduced compared to the area on the outer surface, and therefore, the design is improved, and the operability and workability are improved.

Fig. 6 is an enlarged view showing an end portion of the internal structure 600 including the latch mechanism 115 arranged on the side opposite to the end portion of the decorative panel 107 shown in fig. 4 and 5 in an enlarged manner. The latch mechanism 115 shown in fig. 6 corresponds to an internal structure 600 of a cross section of the decorative panel 107 as viewed in the viewing direction, the cross section being taken along a section line D-D in the direction perpendicular to the paper surface in fig. 1. Latch mechanisms 115 having a function of holding the suction grill 109b in a detachable manner with respect to the decorative panel 107 are formed at both end portions of the suction grill 109b on the side of the decorative panel 107 opposite to the end portions shown in fig. 4 and 5, the end portions being separated in the direction of the cutting line D-D in fig. 1.

In the structure of fig. 6, an air outlet 108 is formed at an end portion of the decorative panel, and an air guide plate 112 is rotatably held by a pivot mechanism 113 in the air outlet 108, so that the conditioned air is blown out into the room to perform air conditioning of the room air, as in the embodiment shown in fig. 4 and 5.

On both sides of the outlet 108, a heat insulating material is disposed similarly to the end portion on the opposite side, and an intake grill 109b extends below the heat insulating material 110 disposed on the inside. In order to improve the design of the indoor side of decorative panel 107, suction grill 109b extends to a position adjacent to air outlet 108. The opposite end of the suction grill 109b similarly extends to the opposite outlet 108, and in the illustrated exemplary embodiment, the suction grill 109b is formed in a rectangular shape as shown in fig. 3.

On the other hand, a latch mechanism 115 for locking the suction grill 109b in engagement is formed at an end of the suction grill 109b and a short side end of the decorative panel 107 facing the suction grill 109 b. Latch mechanism 115 includes an operation hook 115a, a storage space 115c, and an engagement portion 115b integrated with decorative panel 107. An elastic body 115d for biasing the operation hook 115a is stored in the storage space 115 c.

The operation hook 115a has the following configuration: the knobs protruding from between the louvers of the self-suction grill 109b extend outward along the upper surface of the suction grill 109b, are bent upward at appropriate positions of the suction grill 109b, and are bent outward again. An end portion of the operation hook 115a on the opposite side to the knob constitutes an engagement claw 115e that engages with the decorative panel 107.

The storage space 115c is defined by a portion of the operation hook 115a extending along the upper surface of the suction grill 109b and a protruding portion rising from the inner surface of the suction grill 109 b. An elastic body 115d called a spring is disposed in the housing space 115c, and the elastic body 115d biases the engaging claw 115e of the operation hook 115a to protrude in the outward direction.

At the position where the suction grill 109b is fixed, the engagement claw 115e of the operation hook 115a is fitted into the engagement portion 115b formed in the decorative panel 107, and the suction grill 109b is fixed. When the operator attempts to access the inside of the indoor unit 100 and move the suction grill 109b, first, the operator moves the operation hook 115a in the direction of the arrow E, pulls the engagement claw 115E out of the engagement portion 115b, and rotates the suction grill 109b to the lower side of the paper surface. Thereafter, the operator rotates the suction grill 109b to the lower side of the paper surface, and removes the suction grill 109b as necessary, thereby allowing access to the inside of the indoor unit 100.

The suspension wire 109c shown in fig. 2 is fixed to an appropriate position of the suction grill 109b, and the suction grill 109b can be held in place and the suction grill 109b can be prevented from being dropped accidentally or the like.

< modification 1 >

In modification 1, for example, the dummy grills 109a are mounted by being rotated with respect to the mounting direction of the decorative panel 107. As shown in fig. 3, the grating 109 is formed substantially in a square shape, but portions other than the dummy grating 109a are formed substantially in a rectangular shape. Therefore, by rotating the dummy louver 109a by 90 ° with respect to the mounting direction of the decorative panel 107, the direction in which the louvers of the louver 109 extend can be changed. Therefore, the workability when the indoor unit 100 is installed indoors can be improved while taking design into consideration.

< modification 2 >

Fig. 7 shows an exemplary modification. In describing the modification, the same reference numerals are used to describe the components that have the same or common functions as those of the above-described embodiment, and the description thereof will be omitted. The modification shown in fig. 7 is an embodiment in which the grill 109 of the indoor unit 700 can be raised and lowered by the raising and lowering motor 713 and a suspension wire.

The indoor unit 700 shown in fig. 7 accommodates the heat exchanger 103, the fan 105, and the fan motor 106 for driving the fan 105 in the casing 102 of the indoor unit 100. The indoor air flows in the direction of arrow a, flows toward heat exchanger 103 with the airflow generated by fan 105, and exchanges heat with the refrigerant circulating in heat exchanger 103.

The conditioned air after heat exchange is discharged from the air outlet 108 toward the room in the direction of arrow B. A dew receiving pan 104 is disposed below the heat exchanger 103 to collect drain water of the heat exchanger 103.

A decorative panel 107 is provided on the indoor side of the casing 102, and a grill 109 is detachably provided on the indoor side of the decorative panel 107. The grill 109 includes a suction grill 109b held by a lifting motor 713 to be lifted and lowered freely, and dummy grills 109a disposed at both ends of the suction grill 109 b.

The inner portion of the dummy grill 109a is formed as a suction grill 109b formed in a rectangular shape, more specifically, a rectangular shape, separately from the dummy grill 109a, and a receiving portion 715 for receiving the suction grill 109b is formed in the inner portion of the dummy grill 109a in correspondence thereto. The suction grill 109b is formed with wire attaching portions 710a to 710d, and the wire attaching portions 710a to 710d are formed at appropriate positions at four corners of the suction grill 109 b.

Fig. 7 shows only the

wire attaching portions

710a and 710b arranged on the front side of the drawing. A suspension wire 712 for vertically and freely holding the suction grill 109b is fixed to the

wire attachment portions

710a and 710b via a wire holding mechanism. A filter 111 is placed on a surface of the suction grill 109b facing the indoor unit 100.

Inside the casing 102, a lifting motor 713 and a roller 714 are disposed by appropriate mounting members. The elevation motor 713 rotates the roller 714 to elevate and lower the suction grill 109b fixed to the other end of the suspension wire 712. During normal operation of the indoor unit 100, the lifting motor 713 lifts the suction grill 109b to a position where the dummy grill 109a and the suction grill 109b are integrated.

In the modification shown in fig. 7, the elevation motor 713 is disposed on the left and right sides of the casing 102, but the elevation motor 713 may be disposed on one side of the casing 102, for example, according to the structure of patent document 1. The suspension wires 712 may be configured such that two wires on one side are driven by one elevation motor 713, and two wires on the other side are driven by another elevation motor 713 that is driven in synchronization with the one elevation motor 713. The suspension wire 712 may be wound and unwound by four lifting motors 713, or may be wound and unwound by four independent lifting motors 713.

On the other hand, when performing filter replacement, cleaning, inspection, part replacement, or the like of the indoor unit 700, the elevating motor 713 is activated in response to a command from a remote controller (not shown) for controlling the indoor unit 100, and the suction grill 109b is lowered to a predetermined height, so that the operator can access the inside of the casing 102.

In the modification, from the viewpoint of design, the grill 109 is also formed to extend to the vicinity of the four-directional air outlets 108 formed in the decorative panel 107. Therefore, the area of the entire grille 109 in the appearance of the grille 109 is increased to improve the design. However, in the modification, the dummy grill 109a and the suction grill 109b are formed separately from each other, so that the weight and space are reduced, and the operability and workability of the suction grill 109b are improved, and the design is improved. In another modification, dummy grills 109a may be formed in four directions of the decorative panel 107, and the suction grills 109b may be further reduced in weight.

In the modification, it is not necessary to use a hinge mechanism and a latch mechanism for rotatably holding the suction grill 109 b. Alternatively, for example, a stopper mechanism may be added which stops the rotation of the elevation motor 713 and prevents the reverse rotation when the elevation motor 713 raises the suction grill 109b to a predetermined position. In another embodiment, a conventional manual or electric latch mechanism for fixing the suction grill 109b to the decorative panel 107 may be formed in the grill 109.

Industrial applicability of the invention

In the modification described above, it is also possible to provide a ceiling-embedded air conditioner having a structure in which the grille can be seen in a wide range, the opening and closing of the grille is easy, and the weight of the grille is reduced despite the large area of the grille.

Description of the symbols

100-indoor unit, 102-box, 103-heat exchanger, 104-dew receiver, 105-fan, 106-fan motor, 107-decorative panel, 108-outlet, 109-grille, 109 a-dummy grille, 109 b-suction grille, 109 c-suspension wire, 110-heat insulator, 114-hinge, 114 a-front end, 114 b-base, 114 c-connecting part, 114 d-hinge receiving part, 114 e-hinge stopper, 115-latch mechanism.

The claims (modification according to treaty clause 19)

(deletion)

(modified) a ceiling-embedded air conditioner comprising an indoor unit including a fan, a fan motor, and a heat exchanger,

the indoor unit includes:

a grille mounted on the decorative panel,

the grill has a suction grill provided to the suction port and a dummy grill extending from at least one end of the suction grill and provided between the suction port and the discharge port,

the suction grill is configured to be rotatable around one of the dummy grills.

the indoor unit includes:

a grille mounted on the decorative panel,

the indoor unit includes a hinge receiving portion that receives a hinge that can open and close the suction grill above the one dummy grill.

Statement or declaration (modification according to treaty clause 19)

In a amendment based on article 19 (1) of the treaty filed on the same date, claim 1 of the original application is deleted, and the structure of claim 1 of the original application is added to claims 4 and 5 which are considered novel and inventive in international survey reports. Claim 2 or 3 is deleted.

With the above modifications, the present international application has both claims 4 and 5. The details of the modification are as follows.

(1) Claim 1 of the original application was deleted by incorporating the structure of claim 1 into claims 4 and 5.

(2) Claim 2 of the original application is deleted.

(3) Claim 3 of the original application is deleted.

(4) Claim 4, which is modified, is an independent claim in which the requirements of claim 1 are added to claim 4 which is considered to be novel and inventive in the international survey report.

(5) Claim 5, which is modified, is an independent claim in which the requirements of claim 1 are added to claim 5 which is considered to be novel and inventive in the international survey report.

Claims

1. A ceiling-embedded air conditioner comprising an indoor unit including a fan, a fan motor, and a heat exchanger,

the indoor unit includes:

a grille mounted on the decorative panel,

2. A ceiling-embedded air conditioner according to claim 1,

the suction grilles are arranged between the dummy grilles.

3. A ceiling-embedded air conditioner according to claim 1,

the dummy grill extends from an end of the suction grill by a width of at least 1/2 or more of a width between the air outlet and the suction grill.

4. A ceiling-embedded air conditioner according to claim 1,

the suction grill is configured to be rotatable around one of the dummy grills.

5. A ceiling-embedded air conditioner according to claim 1,