JP5879959B2 - Embedded ceiling indoor unit - Google Patents

Description

  The present invention relates to a ceiling-embedded indoor unit.

  As an indoor unit of an air conditioner of the type installed on the ceiling, for example, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2011-27336), a substantially rectangular decorative panel is attached to the lower surface of the casing. There is something. A fan for generating airflow is housed inside the casing. And the suction grille in which the suction inlet was formed is attached to the center part of the decorative panel and the lower side of the fan. Thereby, indoor air will be suck | inhaled via the suction inlet in the inside of a casing.

  The decorative panel and the suction grille are components on the lower surface of the indoor unit, and are easy to touch. For this reason, the design related to the lower surface may be an important element in selecting a product depending on the person. However, in the indoor unit of Patent Document 1, when the indoor unit is looked up from below, the inside of the casing can be seen from the suction port, and the design is impaired.

  On the other hand, a method of concealing the inside of the casing by concealing the suction port with another panel and providing an annular suction opening in this panel is conceivable. However, if the side surface of the central member surrounded by the annular suction opening extends along the vertical direction, the air sucked into the casing from the suction opening becomes difficult to flow smoothly, and the air is The vortex is made.

  An object of the present invention is to suppress the generation of air vortices.

  A ceiling-embedded indoor unit according to a first aspect of the present invention includes a casing, a panel, and a fan. An opening for sucking air is formed in the lower surface of the casing. The panel is located in the vicinity of the opening of the casing and has a central member and a suction opening. The central member is located at the approximate center of the opening when viewed from the vertical direction. The suction opening is an annular opening surrounding the central member. The fan is located inside the casing, generates an air flow from the suction opening toward the inside of the casing, and is located on the downstream side of the air flow from the panel. And the reference surface which is the lower surface of the center member is substantially horizontal, and the side surface extending upward from the periphery of the reference surface is inclined toward the center of the center member with respect to the vertical direction.

  In this indoor unit, the side surface of the central member is inclined toward the center with respect to the vertical direction. Therefore, the air sucked into the casing from the annular suction opening is guided into the casing along the side surface of the central member that is an inclined surface. Thereby, generation | occurrence | production of the vortex of air is suppressed, and while suppressing ventilation resistance, generation | occurrence | production of the sound by an air vortex can be suppressed. That is, the side surface of the central member plays a role as a guide for suppressing separation of the air flow.

  The ceiling-embedded indoor unit according to the second aspect of the present invention is the indoor unit according to the first aspect, wherein the first width of the suction opening on the upper surface side of the panel is the first width of the suction opening on the lower surface side of the panel. Greater than 2 widths.

  As a result, the pressure of the air flowing from the lower surface side to the upper surface side of the panel through the suction opening and moving toward the inside of the casing changes abruptly as compared with the case where the first width and the second width are the same. Since it becomes difficult, generation | occurrence | production of an air vortex and noise prevention can be performed effectively.

  The ceiling-embedded indoor unit according to the third aspect of the present invention is the indoor unit according to the first or second aspect, wherein the upper surface of the central member protrudes upward and is curved.

  Thereby, the air introduced into the casing from the annular suction opening flows more smoothly along the side surface and the upper surface of the central member to the fan side. Therefore, the generation of air vortices can be more effectively suppressed.

  The ceiling-embedded indoor unit according to the fourth aspect of the present invention is the indoor unit according to any one of the first to third aspects, wherein the panel is formed in a hollow shape.

  Thereby, the weight of a panel can be reduced.

  The ceiling-embedded indoor unit according to the fifth aspect of the present invention is the indoor unit according to any one of the first to fourth aspects. The panel further includes an annular member. The annular member is positioned so as to surround the suction opening when viewed from the vertical direction. The side surface of the annular member that extends upward from the lower surface in contact with the suction opening is inclined toward the center of the central member with respect to the vertical direction.

  In this indoor unit, not only the side surface of the central member but also the side surface of the annular member on the suction opening side is inclined toward the center of the central member. This ensures that the air flows to the fan side.

  A ceiling-embedded indoor unit according to a sixth aspect of the present invention is the indoor unit according to any one of the first to fifth aspects, wherein the side surface of the central member is inclined at about 30 to 80 degrees with respect to the reference plane. doing.

  In this indoor unit, the side surface of the central member is a sufficiently inclined surface for smoothly introducing air into the casing. Therefore, the generation of air vortices can be more reliably suppressed.

  The ceiling-embedded indoor unit according to the seventh aspect of the present invention further includes a filter and a cleaning unit in the indoor unit according to any one of the first to sixth aspects. The filter is located between the fan and the panel, and removes dust from the air before being sucked into the fan through the suction opening. The cleaning unit is disposed inside the casing and in the vicinity of the filter, and removes dust adhering to the filter.

  Thereby, dust is removed by the filter from the air reliably introduced into the casing along the side surface of the inclined central member. Therefore, clean air is taken into the fan.

  According to the indoor unit pertaining to the first aspect of the present invention, the generation of air vortices is suppressed, airflow resistance can be suppressed, and the generation of sound due to air vortices can be suppressed.

  According to the indoor unit according to the second aspect of the present invention, the first and second widths of the air pressure flowing from the lower surface side to the upper surface side of the panel through the suction opening toward the inside of the casing are the same. Since it becomes difficult to change abruptly as compared with the case, generation of air vortex and noise prevention can be effectively performed.

  According to the indoor unit according to the third aspect of the present invention, the air introduced into the casing from the annular suction opening flows more smoothly along the side surface and the upper surface of the central member to the fan side. Therefore, the generation of air vortices can be more effectively suppressed.

  According to the indoor unit according to the fourth aspect of the present invention, the weight of the panel can be reduced.

  According to the indoor unit according to the fifth aspect of the present invention, air surely flows to the fan side.

  According to the indoor unit pertaining to the sixth aspect of the present invention, the generation of air vortices can be more reliably suppressed.

  According to the indoor unit according to the seventh aspect of the present invention, clean air is taken into the fan.

The schematic block diagram of the air conditioning apparatus which concerns on this embodiment. II-II sectional drawing of the indoor unit of FIG. 1 embedded in the ceiling. The expanded view of the panel vicinity among sectional drawings of the indoor unit of FIG. The figure at the time of seeing the panel concerning this embodiment from the perpendicular direction. It is II-II sectional drawing of the indoor unit of FIG. 1 embedded in the ceiling, Comprising: The figure which shows the flow of the air introduce | transduced inside a casing.

  Hereinafter, a ceiling-embedded indoor unit according to the present invention will be described in detail with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Overview FIG. 1 is an external view of an air conditioner 100 including an indoor unit 20 according to the present embodiment. The air conditioner 100 is configured by being divided into an outdoor unit 10 installed outdoors and an indoor unit 20 embedded in the ceiling of the air-conditioning target room RA in the building. The outdoor unit 10 and the indoor unit 20 are connected via refrigerant pipes L1, L2 for liquid refrigerant and gas refrigerant. Such an air conditioning apparatus 100 can perform an air conditioning operation including a cooling operation and a heating operation in the air conditioning target room RA.

  Although not shown, the outdoor unit 10 is provided with an outdoor heat exchanger (not shown), a compressor, and the like. The outdoor unit 10 compresses the refrigerant passing through the refrigerant pipes L1 and L2 or causes the outdoor heat exchanger to perform heat exchange between the refrigerant and the outside air, so that the refrigerant in a gas state or a liquid state is obtained. Or sent to the indoor unit 20.

  During the air conditioning operation, the indoor unit 20 exchanges refrigerant with the outdoor unit 10 and supplies air after air conditioning (hereinafter referred to as conditioned air) to the room. In particular, in the indoor unit 20 according to the present embodiment, a panel 40 is located near the suction port 32 (corresponding to the opening) on the lower surface of the casing 30 so as not to impair the design. The panel 40 is for preventing the designability from being impaired by preventing the inside of the casing 30 from being seen through the suction port 32 when the user looks up at the indoor unit 20 from below. Therefore, the panel 40 is positioned so as to substantially cover the suction port 32 (see FIGS. 1 and 4). However, when the panel 40 is completely covered, the room air is taken into the casing 30 from the suction port 32. Will not be able to. Therefore, the panel 40 has the suction opening part 42 for taking in indoor air into the casing 30 inside (refer FIG. 4). Details of the panel 40 will be described later.

  By the way, in the description of the present embodiment, expressions indicating directions such as “up”, “down”, “vertical”, “horizontal” and the like are used as appropriate, but in these cases, the indoor unit 20 is installed in the state of FIG. Represents each direction in the state.

(2) Configuration of Indoor Unit Next, the configuration of the indoor unit 20 according to the present embodiment will be described in detail. As shown in FIGS. 1 to 4, the indoor unit 20 mainly includes a casing 30, a panel 40, a fan 50, an indoor heat exchanger 60, and a filter 70.

(2-1) Casing The casing 30 is inserted and installed in an opening (not shown) formed in the ceiling in the air conditioning target room RA, and has a box shape. Specifically, the side surface of the casing 30 has an approximately octagonal shape in which long sides and short sides are alternately and continuously formed in a top view (FIG. 1), and the bottom surface is substantially quadrangular. It has a shape.

  And on the lower surface of the casing 30, four blowing ports 31a, 31b, 31c, and 31d are formed along the peripheral edge of the lower surface. One suction port 32 is provided at a position on the lower surface of the casing 30 surrounded by the blowout ports 31a to 31d. That is, the suction port 32 is provided at the approximate center of the lower surface of the casing 30. The outlets 31a to 31d each have a substantially quadrangular shape elongated in the peripheral direction of the lower surface of the casing 30, and the suction port 32 has a substantially quadrangular shape. The room air in the air-conditioning target room RA is sucked into the casing 30 from the suction port 32, and the air-conditioned air is blown out from the air outlets 31a to 31d to the air-conditioning target room RA. In particular, since the outlets 31a to 31d are provided along the peripheral edge of the lower surface of the casing 30, the indoor unit 20 can blow out the conditioned air in different directions.

  In addition, horizontal flaps 33a to 33d are provided at the respective outlets 31a to 31d. The horizontal flaps 33a to 33d guide the air blown from the blowout ports 31a to 31d in a desired direction. The horizontal flaps 33a to 33d are rotationally driven by a flap motor (not shown), and can change the guiding direction of the conditioned air or close the outlets 31a to 31d.

  Further, an opening (not shown) through which a part of each refrigerant pipe L1, L2 passes is formed on the side surface of the casing 30. Thereby, refrigerant | coolant piping L1, L2 comes to be connected with the indoor heat exchanger 60 (FIG. 2).

(2-2) Panel As shown in FIG. 4, the panel 40 has a substantially quadrangular shape with rounded corners when viewed from the vertical direction. The size of the panel 40 is slightly larger than the suction port 32. As shown in FIG. 2, the panel 40 is fixed and positioned near the suction port 32 so as to shield (specifically, cover) the suction port 32 from the outside.

  In particular, the panel 40 according to the present embodiment has a hollow interior so as to reduce its weight. As shown in FIGS. 2 to 4, mainly the central member 41, the suction opening 42, and the like. And an annular member 43.

(2-2-1) Center Member The center member 41 is located substantially at the center of the suction port 32 in the casing 30 when the panel 40 is viewed from the vertical direction, as shown in FIG. The central member 41 has a shape obtained by reducing the outer shape of the panel 40, that is, has a substantially quadrangular shape with rounded corners when the panel 40 is viewed from the vertical direction. The size of the central member 41 is smaller than the suction port 32 of the casing 30, and can be, for example, about 2/3 of the suction port 32. That is, it can be said that the central member 41 is a member for hiding the casing 30 provided mainly so that the inside of the casing 30 cannot be seen from below the indoor unit 20. As shown in FIG. 2, the reference surface 41a, which is the lower surface of the central member 41, is exposed in the air-conditioning target room RA, and the reference surface 41a is substantially horizontal.

  Furthermore, as shown in FIG. 2, in the central member 41, a side surface 41b extending upward from the periphery of the reference surface 41a is inclined toward the center of the central member 41 with respect to the vertical direction. That is, the central member 41 has a convex shape upward. The upper surface 41c of the central member 41 is curved while protruding upward. Accordingly, the central member 41 has a convex shape upward with rounded corners.

  Suppose that the side surface of the central member 41 is not inclined with respect to the reference surface 41a and extends along the vertical direction. In this case, the vortex of the indoor air sucked into the casing 30 from the suction opening 42 is generated near the side surface and the upper surface of the central member 41, and the air flow of the indoor air is disturbed. However, according to the central member 41 according to the present embodiment described above, the side surface 41b of the central member 41 is inclined toward the center with respect to the reference surface 41a. It flows to the fan 50 side along 41b (broken arrows A and B in FIG. 5). Therefore, generation | occurrence | production of the vortex of room air is suppressed and generation | occurrence | production of the sound by ventilation resistance and a vortex can be suppressed. Furthermore, since the upper surface 41c of the central member 41 is rounded and has a convex shape, the turbulence of the air flow of the room air is further suppressed. From the above, it can be said that the side surface 41b of the central member 41 according to the present embodiment plays a role as a guide for suppressing separation of the air flow.

  Here, in order to define how much the central member 41 having such a shape protrudes upward, as shown in FIG. 2, a height h1 from the reference surface 41a to the highest portion of the upper surface 41c, A numerical range of the inclination angle α1 of the side surface 41b with respect to the reference surface 41a will be described. Here, in the present embodiment, as shown in FIG. 2, the inclination angle α <b> 1 is uniform over the entire periphery of the central member 41. The height h1 of the central member 41 is preferably about 10 mm or more, and more preferably about 30 mm or more. More specifically, the height h1 of the central member 41 is preferably in the range of about 30 mm to about 50 mm. And as inclination-angle (alpha) 1 of the side surface 41b of the central member 41, it is preferable to exist in the range of about 30 degree | times-80 degree | times. Thereby, the side surface 41b of the central member 41 becomes an inclined surface sufficient to smoothly introduce the indoor air into the casing 30, and the generation of air vortices can be effectively suppressed.

  Further, the radius of curvature of the corner of the upper surface 41c of the central member 41 can be R100.

(2-2-2) Suction opening As shown in FIGS. 2 to 4, the suction opening 42 is an annular opening that surrounds the central member 41, and as described above, the indoor air is outside the indoor unit 20. It is a vent for indoor air when being taken into the casing 30 from the inside. As shown in FIG. 4, the width w <b> 1 of the suction opening 42 is sufficiently smaller than the horizontal width or vertical width of the central member 41 when viewed from the vertical direction. The width w1 of the suction opening 42 is, for example, about 30 mm or more.

  As shown in FIG. 4, the suction opening 42 according to the present embodiment has rounded corners when the panel 40 is viewed from the vertical direction according to the shape of the central member 41.

  Further, the width w1 of the suction opening 42 is different between the upper surface side and the lower surface side of the panel 40. Specifically, as shown in FIG. 3, the first width w <b> 3 of the suction opening 42 on the upper surface side of the panel 40 is larger than the second width w <b> 4 of the suction opening 42 on the lower surface side of the panel 40. This is to prevent the generation of air flow vortices due to pressure loss and the accompanying noise.

  Here, the reason why the first width w3 is larger than the second width w4 will be specifically described. Since the first width w3 is on the upper surface side of the panel 40, it can be said that the first width w3 is closer to the inside of the casing 30 than the second width w4 side. Then, if the first width w3 and the second width w4 are set to the same width, the pressure loss of the airflow flowing from the lower surface side of the panel 40 to the upper surface side through the suction opening 42 becomes large. It becomes. That is, if the first width w3 and the second width w4 are made the same width, the space in the casing 30 becomes large at a stroke when the airflow passes near the upper surface of the panel 40, and therefore the pressure gradient of the airflow. Will grow rapidly. Then, the vortex of the air flow is easily generated, and noise is generated. However, in this embodiment, since the first width w3 of the suction opening 42 on the upper surface side of the panel 40 is larger than the second width w4 on the lower surface side, the first width w3 and the second width w4 are the same width. As compared with the above, it is possible to suppress a sudden increase in the pressure gradient of the air flow. Therefore, it is possible to suppress the generation of air flow vortices generated due to a large pressure loss and the accompanying noise.

  In the present embodiment, the central member 41 has a shape that curves while protruding upward, thereby realizing a configuration in which the first width w3 of the suction opening 42 is larger than the second width w4 on the lower surface side. .

(2-2-3) Annular member As shown in FIG. 4, the annular member 43 has the same shape as the suction opening 42 when the panel 40 is viewed from the vertical direction. It is located so as to surround it. The width w2 of the annular member 43 is always constant and can be, for example, in the range of about 30 mm to about 50 mm. The annular member 43 has rounded corners when the panel 40 is viewed from the vertical direction according to the shape of the suction opening 42.

  In particular, as shown in FIG. 2, the annular member 43 according to the present embodiment has a side surface 43 b that extends upward from the lower surface 43 a in contact with the suction opening 42 and is inclined toward the center of the central member 41 with respect to the vertical direction. doing. That is, the side surface 43b of the annular member 43 in contact with the suction opening 42 does not extend along the vertical direction but is inclined toward the central member 41 side, like the side surface 41b of the central member 41. And as inclination-angle (alpha) 2 with respect to the lower surface 43a of the side surface 43b of the annular member 43, it exists in the range of about 170 degree | times-140 degree | times.

  In the present embodiment, the case where the inclination angle α2 is uniform over the entire periphery of the annular member 43 on the suction opening 42 side is shown.

  With the annular member 43 having such a shape, indoor air enters the casing 30 through the suction opening 42 as shown by broken arrows A and B in FIG. 5, and the side surface 41 b of the central member 41 and the annular member 43. It is guided to the upper side of the panel 40 along the side surface 43b of the upper side, and flows reliably to the fan 50 positioned above the panel 40.

  As shown in FIG. 4, the central member 41 and the annular member 43 are positioned away from each other by the suction opening 42, but these are supported by elongated support members p <b> 1 and p <b> 2. Thereby, the central member 41, the suction opening 42, and the annular member 43 form one panel 40. Therefore, it can be said that the width w <b> 1 and the shape of the suction opening 42 are defined by the positions of the central member 41 and the annular member 43.

(2-3) Fan The fan 50 is located above the panel 40 and inside the casing 30 as shown in FIG. The fan 50 generates airflow that directs room air to the inside of the casing 30 through the suction opening 42, and the conditioned air after heat exchange is performed by the indoor heat exchanger 60. It is the centrifugal blower which blows off from the inside of the casing 30 via the. That is, it can be said that the fan 50 is located downstream of the panel 40 in the air flow.

  The fan 50 includes a fan motor M50 provided at approximately the center of the upper surface of the casing 30, and an impeller (not shown) connected to the motor M50 and driven to rotate. The impeller is an impeller having turbo blades, and can suck air into the impeller from below and blow out toward the outer peripheral side of the impeller when viewed from the vertical direction. The rotation speed of the fan motor M50 can be changed by a motor driver (not shown), whereby the fan 50 can control the air volume of the conditioned air blown from the blowout ports 31a to 31d.

(2-4) Indoor Heat Exchanger As shown in FIG. 2, the indoor heat exchanger 60 is located inside the casing 30 and in the vicinity of the air blowing portion of the fan 50. The indoor heat exchanger 60 is connected to the refrigerant pipes L1 and L2, and is configured by a finned tube heat exchanger that is bent and arranged so as to surround the fan 50 when viewed from the vertical direction. Yes. The indoor heat exchanger 60 performs heat exchange with room air in the air-conditioning target room RA sucked from the suction opening 42.

  Specifically, the indoor heat exchanger 60 functions as a refrigerant evaporator during cooling operation. As a result, the indoor air sucked into the casing 30 is deprived of heat by the refrigerant flowing in the heat transfer tubes (not shown) constituting the indoor heat exchanger 60 and cooled. Conversely, the indoor heat exchanger 60 functions as a refrigerant radiator during heating operation. Thereby, the indoor air sucked into the casing 30 is deprived of heat from the refrigerant flowing through the heat transfer tubes constituting the indoor heat exchanger 60 and is warmed. The conditioned air after the heat exchange is performed by the indoor heat exchanger 60 is returned to the air-conditioning target room RA through the opened outlets 31a to 31d.

  A drain pan 61 is installed below the indoor heat exchanger 60 as shown in FIG. The drain pan 61 is for receiving drain water generated by condensation of moisture in the air by the indoor heat exchanger 60. Further, a bell mouth (not shown) for guiding room air to the fan 50 is disposed near the drain pan 61. The bell mouth has a circular shape when viewed from the vertical direction.

(2-5) Filter As shown in FIG. 2, the filter 70 is located between the fan 50 and the panel 40 inside the casing 30. Specifically, the filter 70 has a substantially quadrangular shape in accordance with the shape of the panel 40, and is supported and positioned near the upper surface of the panel 40 via a support member. The filter 70 removes dust from the indoor air before being sucked into the fan 50 through the suction opening 42. Therefore, the air that has passed through the filter 70 becomes air that does not contain dust relatively, and is sent into the fan 50 through the bell mouth.

  In addition to the above, the indoor unit 20 includes a human detection sensor 91, a floor temperature sensor 92, and a control unit (not shown). The human detection sensor 91 and the floor temperature sensor 92 are provided on the lower surface of the casing 30 as shown in FIG. The control unit is provided inside the casing 30. The human detection sensor 91 detects the presence or absence of a person in the air conditioning target room RA, and the floor temperature sensor 92 detects the temperature of the floor in the air conditioning target room RA. The control unit is a microcomputer composed of a CPU and a memory. When receiving various operation instructions such as an air conditioning operation and a cleaning operation transmitted from a remote controller, for example, the control unit controls the rotational speed of the fan 50 and the horizontal flaps 33a to 33a. 33d open / close control and the like are performed.

(3) Features (3-1)
The indoor unit 20 of the present embodiment is a ceiling embedded type, and includes a casing 30, a panel 40, and a fan 50. In particular, the panel 40 includes a central member 41 located substantially at the center of the suction port 32 when viewed from the vertical direction, and a suction opening 42 that is an annular opening surrounding the central member 41. The central member 41 has a lower reference surface 41a that is substantially horizontal, and a side surface 41b that extends upward from the periphery of the reference surface 41a is inclined toward the center of the central member 41 with respect to the vertical direction.

  With this configuration, the air sucked into the casing 30 from the annular suction opening 42 is guided into the casing 30 along the side surface 41b of the central member 41 having an inclined surface. Accordingly, the generation of air vortices can be suppressed, the ventilation resistance can be suppressed, and the generation of sound due to the air vortices can be suppressed. That is, the side surface 41b of the central member 41 plays a role as a guide for suppressing separation of the air flow.

(3-2)
In the present embodiment, the first width w3 of the suction opening 42 on the upper surface side of the panel 40 is larger than the second width w4 of the suction opening 42 on the lower surface side of the panel 40. Thereby, the pressure of the air which flows from the lower surface side of the panel 40 via the suction opening 42 to the upper surface side and goes into the casing 30 is compared with the case where the first width w3 and the second width w4 are the same. Since it becomes difficult to change suddenly, generation of air vortex and noise prevention can be effectively performed.

(3-3)
Furthermore, the upper surface 41c of the central member 41 according to the present embodiment protrudes upward and is curved. Thereby, the air introduced into the casing 30 from the annular suction opening 42 flows more smoothly along the side surface 41b and the upper surface 41c of the central member 41 to the fan 50 side. Therefore, the generation of air vortices can be more effectively suppressed.

(3-4)
Furthermore, the panel 40 of the present embodiment has a hollow interior. Thereby, the weight of the panel 40 can be reduced.

(3-5)
Further, the panel 40 of the present embodiment further includes an annular member 43 positioned so as to surround the suction opening 42 when viewed from the vertical direction. The annular member 43 has a side surface 43b that extends upward from the lower surface 43a in contact with the suction opening 42 and is inclined toward the center of the central member 41 with respect to the vertical direction. That is, in the indoor unit 20 according to the present embodiment, not only the side surface 41 b of the central member 41 but also the side surface 43 b on the suction opening 42 side of the annular member 43 is inclined toward the center of the central member 41. Therefore, the air surely flows to the fan 50 side along the side surfaces 41 b and 43 b of the central member 41 and the annular member 43.

(3-6)
In particular, the side surface 41b of the central member 41 according to the present embodiment is inclined by about 30 to 80 degrees with respect to the reference surface 41a. That is, in this indoor unit 20, the side surface 41 b of the central member 41 is sufficiently inclined to introduce air into the casing 30 smoothly. Therefore, the generation of air vortices can be more reliably suppressed.

(3-7)
The indoor unit 20 of the present embodiment further includes a filter 70 that removes dust from the air before being sucked into the fan 50. Accordingly, clean air is taken into the fan 50.

(4) Modification (4-1) Modification A
In the said embodiment, as shown in FIG. 4, the case where the center member 41 was a substantially quadrangular shape was demonstrated. However, the shape of the central member 41 is not limited to this, and may be any shape.

(4-2) Modification B
In the above embodiment, as illustrated in FIG. 2, not only the side surface 41 b of the central member 41 but also the side surface 43 b of the annular member 43 is inclined toward the center of the central member 41. However, in the present invention, it is only necessary that at least the side surface 41b of the central member 41 is inclined toward the center, and the side surface 43b of the annular member 43 may not be inclined.

(4-3) Modification C
In the said embodiment, it has demonstrated that the center member 41 has the shape which curves while protruding upwards, and implement | achieves the form from which the 1st width | variety w3 of the suction opening part 42 becomes larger than the 2nd width | variety w4 of the lower surface side. did. However, it is sufficient if the first width w3 of the suction opening 42 on the upper surface side of the panel 40 satisfies the condition that it is larger than the second width w4 on the lower surface side, and the central member 41 is curved while protruding upward. Not necessary. For example, the side surface 41b of the central member 41 is a flat surface like the side surface 43b of the annular member 43, and the inclination angles of the side surface 41b of the central member 41 and the side surface 43b of the annular member 43 with respect to the reference surface 41a are adjusted. Thus, the indoor unit 20 may have a configuration in which the first width w3 is larger than the second width w4.

(4-4) Modification D
In the above embodiment, the case where the filter 70 has a substantially square shape has been described. However, the shape of the filter 70 is not limited to a quadrangle, and may be a substantially circular shape, for example. The indoor unit 20 may further include a cleaning unit for cleaning the filter 70.

DESCRIPTION OF SYMBOLS 100 Air conditioning apparatus 10 Outdoor unit 20 Indoor unit 30 Casing 31a-31d Outlet port 32 Inlet port 33a-33d Horizontal flap 40 Panel 41 Central member 41a Reference surface (lower surface) of central member
41b Central member side surface 41c Central member upper surface 42 Suction opening 43 Annular member 43a Annular member lower surface 43b Annular member side surface 50 Fan 60 Indoor heat exchanger 70 Filter

JP 2011-27336 A

Claims (6)

A ceiling-embedded indoor unit,
A casing (30) having an opening (32) for inhaling air formed in the lower surface;
A panel located near the opening (32) and having a central member (41) positioned substantially in the center of the opening when viewed from the vertical direction and an annular suction opening (42) surrounding the central member. (40)
A fan (50) that is located inside the casing and that produces an air flow from the suction opening toward the inside of the casing, and is located downstream of the panel from the panel;
With
The central member (41)
The reference surface (41a) which is the lower surface is substantially horizontal,
Side extending upward from a peripheral edge of said reference surface (41b) is, are inclined toward the center of the central member with respect to the vertical direction,
The upper surface (41c) of the central member (41) protrudes upward as a whole and is curved,
A ceiling-embedded indoor unit (20). The first width (w3) of the suction opening on the upper surface side of the panel (40) is larger than the second width (w4) of the suction opening on the lower surface side of the panel (40).
The ceiling-embedded indoor unit (20) according to claim 1. The panel (40) has a hollow interior.
The ceiling-embedded indoor unit (20) according to claim 1 or 2 . The panel (40) further includes an annular member (43) positioned so as to surround the suction opening when viewed from the vertical direction,
The annular member (43) has a side surface (43b) that extends upward from its lower surface (43a) in contact with the suction opening, and is inclined toward the center of the central member with respect to the vertical direction.
The ceiling-embedded indoor unit (20) according to any one of claims 1 to 3 . The side surface (41b) of the central member (41) is inclined by about 30 to 80 degrees with respect to the reference surface (41a).
The ceiling-embedded indoor unit (20) according to any one of claims 1 to 4 . A filter (70) located between the fan (50) and the panel (40) for removing dust from the air before being sucked into the fan (50) through the suction opening (42);
Further comprising
The ceiling-embedded indoor unit (20) according to any one of claims 1 to 5 .