Ceiling-mounted indoor unit

Abstract

To provide a ceiling embedded type indoor unit that can suppress drop of a dew condensation water adhering to a side wall of a flap.SOLUTION: A ceiling embedded type indoor unit 10 includes: an indoor unit body 14 including an air outlet 34; a fan installed inside the indoor unit body 14; and a flap 35 supported to the indoor unit body 14 so as to be rotatable to open and close the air outlet 34. A plurality of first irregularity parts 40 is formed in a side wall 36 of the flap 35.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a ceiling-embedded indoor unit. [Background technology]

[0002] Patent document 1 discloses an air conditioner in which a first horizontal flap has an upwind wing portion including a central shaft portion, a left shaft portion, and a right side bearing portion of the first horizontal flap, and a downwind wing portion bent slightly upward from the upwind wing portion, and in which a plurality of grooves with a V-shaped cross section are formed on the lower wing surface of the downwind wing portion along the longitudinal direction of the first horizontal flap. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-091260 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a ceiling-embedded indoor unit that can suppress dripping of condensation water adhering to the side walls of a flap. [Means for solving the problem]

[0005] The ceiling embedded indoor unit of the present disclosure includes an indoor unit body having an air outlet, a fan provided in the indoor unit body, and a flap rotatably supported by the indoor unit body for opening and closing the air outlet, and a plurality of first uneven portions are formed on a side wall of the flap. The first uneven portion is formed such that a groove formed by the first uneven portion extends in a thickness direction of the flap. . Effect of the Invention

[0006] In the ceiling embedded indoor unit of the present disclosure, the first uneven portion prevents droplets of condensation water adhering to the side walls of the flap from coming into contact with each other and gathering together, preventing the droplets from becoming large. As a result, it is possible to prevent the condensation water adhering to the side walls of the flap from dripping. [Brief description of the drawings]

[0007] [Figure 1] FIG. 3 is a cross-sectional view showing the internal structure of the ceiling-embedded indoor unit according to the first embodiment. [Diagram 2] FIG. 1 is a perspective view of a ceiling-embedded indoor unit according to a first embodiment; [Diagram 3] FIG. 1 is a perspective view showing a state in which a flap of a decorative panel is closed in the first embodiment; [Figure 4] FIG. 1 is a perspective view showing a state in which a flap of a decorative panel is open in the first embodiment; [Diagram 5] FIG. 1 is a perspective view showing one end portion of a flap according to the first embodiment; [Figure 6] FIG. 1 is a perspective view showing an upper wing portion of a flap according to a first embodiment; [Figure 7] FIG. 1 is a partial perspective view showing an air outlet portion of a decorative panel according to a first embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (The knowledge and other information that formed the basis of this disclosure) At the time the inventors came up with the idea for this disclosure, there was a technology in existence that by creating multiple grooves with a V-shaped cross section along the longitudinal direction on the lower wing surface of the first horizontal flap to form unevenness, even if condensation occurred on the lower wing surface of the first horizontal flap, the unevenness would be able to retain the condensed water and prevent water splashing. However, during cooling operation, if cold air stagnates on the side walls of the flap, condensation water may adhere to the side walls.The inventors discovered a problem in that the above-mentioned conventional technology is unable to retain the condensation water, which may lead to the condensation water dripping.In order to solve this problem, the inventors came up with the subject matter of the present disclosure. Therefore, the present disclosure provides a ceiling-embedded indoor unit that can suppress dripping of condensation water adhering to the side walls of the flap.

[0009] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters or duplicate description of substantially the same configuration may be omitted. It should be noted that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0010] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIGS. [1-1. Configuration] [1-1-1. Indoor unit configuration] Fig. 1 is a cross-sectional view showing the internal structure of a ceiling-embedded indoor unit 10 for an air-conditioning apparatus according to embodiment 1 of the present disclosure. Fig. 2 is a perspective view of the ceiling-embedded indoor unit 10. In the following description, the terms "upper", "lower", and "inner" and "outer" are used with reference to the ceiling-embedded indoor unit 10 installed on the ceiling. Also, the space into which conditioned air is blown out is referred to as the conditioned room.

[0011] The ceiling embedded type indoor unit 10 is installed in a ceiling space 13 between a building ceiling 11 and a ceiling board 12 installed below the ceiling 11. The ceiling embedded type indoor unit 10 includes an indoor unit body 14 and a decorative panel 30 that covers a lower opening of the indoor unit body 14. The indoor unit body 14 is provided with a generally box-shaped housing 15 with the bottom surface thereof being open on substantially the entirety. Inside the housing 15, the indoor unit body 14 is provided with a polystyrene foam insulating member 16, an indoor heat exchanger 17, a blower 18, a drain pan 19 for receiving drain water from the indoor heat exchanger 17, and a bell mouth 20 for rectifying the air drawn into the blower 18. Hanging fittings 21 are attached to the corners of the outer surface of the housing 15. The indoor unit body 14 is installed in a suspended state from the ceiling 11 by connecting the hanging fittings 21 to hanging bolts 22 hanging down from the ceiling 11.

[0012] The heat insulating members 16 are provided on the inner surfaces of the side plates 15a and the top plate 15b of the housing 15, and prevent condensation from occurring in the housing 15. The blower 18 is configured to include a fan motor 23 and a centrifugal fan 24. The fan motor 23 includes a rotating shaft 23a extending downward, and the centrifugal fan 24 is fixed to the rotating shaft 23a. The centrifugal fan 24 includes a disk-shaped main plate 24a fixed to the rotary shaft 23a, an annular shroud 24b disposed below the main plate 24a and substantially coaxially with the main plate 24a, and a plurality of blades 24c connecting the shroud 24b and the main plate 24a. The blades 24c are disposed at intervals from one another in the circumferential direction of the main plate 24a.

[0013] The indoor heat exchanger 17 is formed by bending a plate-like heat exchanger into a substantially rectangular shape in a plan view so as to surround substantially the entire blower 18 from the side. The indoor heat exchanger 17 functions as a refrigerant evaporator during cooling operation, and functions as a refrigerant evaporator during heating operation. The indoor heat exchanger 17 is configured to exchange heat between the indoor air drawn into the indoor unit body 14 and the refrigerant, thereby cooling the air in the air-conditioned room during cooling operation, and heating the air in the room during heating operation.

[0014] The drain pan 19 is disposed below the indoor heat exchanger 17 so as to be able to receive drain water generated in the indoor heat exchanger 17. The drain pan 19 is made of polystyrene foam. Drain pan 19 is formed in a generally rectangular plate shape so as to cover generally the entire opening on the bottom surface of housing 15. Drain pan 19 has, in the center in a plan view, a drain pan side suction port 25 (suction passage) through which air drawn into blower 18 passes.

[0015] The decorative panel 30 is formed in a substantially rectangular plate shape in a plan view so as to cover the opening on the bottom surface of the indoor unit body 14 . A panel-side suction port 31 that communicates with the bellmouth 20 is formed in the center of the decorative panel 30. An suction grille 32 that covers the panel-side suction port 31 is removably attached to the decorative panel 30. A filter 33 for removing dust and other particles from the air is provided on the indoor unit body 14 side of the suction grille 32.

[0016] Outer air outlets 34 for sending conditioned air to the conditioned room are formed at positions outside the panel-side intake port 31 of the decorative panel 30 and along each side of the outer periphery of the decorative panel 30. That is, the outlets 34 are provided along each side of the decorative panel 30, which is substantially rectangular in plan view, and air is blown out from the outlets 34 in four directions. The air outlets 34 are each provided with a flap 35 capable of adjusting the air outlet direction.

[0017] [1-1-2. Configuration of uneven parts] Fig. 3 is a perspective view showing a state in which the flap 35 of the decorative panel 30 is closed. Fig. 4 is a perspective view showing a state in which the flap 35 of the decorative panel 30 is open. Fig. 5 is a perspective view showing one end portion of the flap 35. Fig. 6 is a perspective view showing an upper wing portion of the flap 35. Fig. 7 is a partial perspective view showing the air outlet 34 portion of the decorative panel 30. In this embodiment, the flap 35 has side walls 36 provided on both ends thereof. A support shaft 37 that supports the flap 35 rotatably is formed to protrude from the side walls 36. A first uneven portion 40 is provided on each of both side walls of the flap . The first uneven portion 40 is formed so as to extend in the thickness direction of the flap .

[0018] Further, a plurality of second uneven portions 41 are formed on both sides of the lower wing surface of the flap . The second uneven portions 41 are formed so as to extend in the longitudinal direction of the flap . The first uneven portion 40 and the second uneven portion 41 may be formed continuously.

[0019] If the width dimension of the second uneven portion 41 is too short, condensation water may drip from the end of the second uneven portion 41. On the other hand, if the width dimension of the second uneven portion 41 is too long, the design of the underside of the flap 35 is impaired. The width dimension of the second uneven portion 41 is preferably set to a width dimension that eliminates the trade-off between the condensation water retention function and the design. The width dimension of the second uneven portion 41 needs to be at least longer than the pitch width of the second uneven portion 41. In addition, the width dimension of the second uneven portion 41 is preferably about 3 to 6 times the pitch width of the second uneven portion 41. In this embodiment, for example, the length of the second uneven portion 41 is 9 mm, and the pitch of the uneven portion is 2 mm.

[0020] Further, side step portions 42 having a large thickness are provided on both sides of the upper wing surface 39 of the flap 35. A front step portion 43 having a large thickness is formed on the front end portion of the upper wing surface 39 of the flap 35. By providing the side surface step portion 42 in this manner, the area of ​​the first uneven portion 40 can be increased, and this makes it possible to ensure a large area for condensation water to adhere to the first uneven portion 40.

[0021] Incidentally, an uneven portion continuing from the first uneven portion 40 may be formed on the upper surface of the side surface step portion . This allows the uneven portion to hold the condensation water adhering to the upper surface of the side surface step portion 42. Even if the condensation water held by the uneven portion flows onto the side wall 36 of the flap 35, the first uneven portion 40 can hold the condensation water.

[0022] As shown in FIG. 7, of the inner wall surface 36 of the decorative panel 30, a downstream inner wall surface 50 located on the downstream side of the air blown out from the air outlet 34 (on the outer wall surface 38 side of the air outlet 34) is formed in a curved shape. A third uneven portion 51 is formed on the downstream side inner wall surface 50. The third uneven portion 51 extends linearly when viewed from the bottom of the decorative panel 30, and is formed extending in the up-down direction along the downstream side inner wall surface 50. Moreover, the third concave-convex portions 51 each have the same width, and are arranged in parallel at equal intervals.

[0023] 3, when the flap 35 closes the air outlet 34, the third uneven portion 51 is covered by the flap 35 over the entire longitudinal area of ​​the flap 35. In other words, the third uneven portion 51 is formed only in a range up to one side closer to the center of the ceiling embedded type indoor unit 10 than the tip of the flap 35 when the flap 35 closes the air outlet 34.

[0024] The decorative panel 30 also has an outer wall surface 52 that stands outside the air outlet 34 , and an outer bottom surface 53 is formed outside the outer wall surface 52 so as to be continuous with the outer wall surface 52 . A plurality of fourth uneven portions 54 are formed on the outer wall surface 52. The fourth uneven portions 54 are formed so as to extend linearly from the upper end of the outer wall surface 52 along the outer wall surface 52 in the up-down direction of the decorative panel 30. Moreover, the fourth uneven portions 54 each have the same width, and are arranged at equal intervals and in parallel. Therefore, the plurality of second uneven portions 39 formed on the outer wall surface 52 form grooves extending in the up-down direction of the decorative panel 30. Furthermore, the upper end of the fourth uneven portion 54 contacts the outer bottom surface 53.

[0025] The first uneven portion 40, the second uneven portion 41, the third uneven portion 51, and the fourth uneven portion 54 are each formed to have a substantially arc-shaped cross section. The first uneven portion 40, the second uneven portion 41, the third uneven portion 51, and the fourth uneven portion 54 are formed such that the intervals between the respective uneven portions reduce the contact angle with condensed water droplets.

[0026] [1-2. Operation] The operation and function of the ceiling embedded type indoor unit 10 configured as above will be described. When the ceiling-embedded indoor unit 10 is in operation, the rotation of the blower 18 draws air from the conditioned room through the panel-side intake port 31 (FIG. 1) and sends it to the indoor heat exchanger 17 via the bell mouth 20. This air undergoes heat exchange as it passes through the indoor heat exchanger 17, and the temperature drops as heat is removed from the air during cooling operation of the ceiling embedded type indoor unit 10, and the temperature rises as heat is given to the air during heating operation of the ceiling embedded type indoor unit 10. The air after heat exchange is blown out from the air outlet 34 into the room to be conditioned. The air that has passed through the air outlet 34 flows in a direction according to the orientation of the flap 35. When the ceiling embedded type indoor unit 10 is stopped, the flap 35 is stationary in an orientation that closes the air outlet 34.

[0027] When the ceiling-embedded indoor unit 10 performs cooling operation, as described above, the air in the conditioned room is cooled by heat exchange in the indoor heat exchanger 17, and this air is sent back into the room through the air outlet 34. Therefore, in the indoor heat exchanger 17, air with a high temperature and a large amount of saturated water vapor is cooled, and becomes air with a low temperature and a small amount of saturated water vapor. As a result, drain water is generated in the indoor heat exchanger 17. This drain water is received in a drain pan 19 provided below the indoor heat exchanger 17, and is sucked out by a drain pump (not shown) and discharged to the outside.

[0028] When the ceiling-embedded indoor unit 10 is in cooling operation, condensation occurs on the flap 35 and the decorative panel 30. In particular, near the outlet 34, where air cooler than the air in the conditioned room is blown out, condensation is likely to form on the side wall 36 of the flap 35, both sides of the lower wing surface 38 of the flap 35, the outer wall surface 52 of the outlet 34, and the downstream inner wall surface 50 downstream of the air being blown out. The droplets of this condensation grow or gather, and when they reach a certain size, they drip off due to their own weight.

[0029] In this embodiment, by providing the first uneven portion 40, droplets of condensed water adhering to the side wall 36 of the flap 35 are separated by the first uneven portion 40. This prevents the droplets of condensed water from coming into contact with each other in the horizontal direction and gathering together. This prevents the droplets of condensed water from becoming large. Furthermore, the width of the first uneven portions 40 and the spacing between the first uneven portions 40 are set so as to reduce the contact angle with water droplets condensed on the side wall 36 of the flap 35, so that the surface area of ​​the water droplets adhering to the side wall 36 of the flap 35 is increased, promoting evaporation of the water droplets.

[0030] Similarly, by providing the second uneven portion 41, the condensation water adhering to both sides of the flap 35 is prevented from growing into large droplets by the second uneven portion 41, and the evaporation of the condensation water is promoted by reducing the contact angle between the condensation water and the droplets. In addition, by providing the third uneven portion 51 and the fourth uneven portion 54, it is possible to prevent the size of droplets of condensation water adhering to the outer wall surface 52 of the air outlet 34 and the downstream inner wall surface 50 downstream of the air being blown out from increasing, and to promote evaporation of the condensation water.

[0031] Furthermore, when the flap 35 is in an intermediate position between fully open and fully closed, condensed water is likely to adhere to the side wall 36 of the flap 35. The first uneven portion 40 and the second uneven portion 41 can prevent the condensed water from dripping. Furthermore, when the flap 35 is fully open, the first uneven portion 40 is positioned so as to extend in a substantially horizontal direction. This prevents the air blown out from the air outlet 34 from being obstructed when the air flows near the first uneven portion 40.

[0032] In addition, when the flap 35 is fully closed, the third uneven portion 51 is covered by the flap 35, so that when the flap 35 is fully closed, the third uneven portion 51 is less likely to condense, but when the flap 35 is fully open, the third uneven portion 51 is more likely to condense. On the other hand, the fourth uneven portion 54 is prone to condensation when the flap 35 is fully closed. Therefore, by providing the third uneven portion 51 and the fourth uneven portion 54, it is possible to prevent the size of condensed water droplets from increasing and to promote the evaporation of the condensed water both when the flap 35 is fully closed and when it is fully open. In this way, by forming the first uneven portion 40, the second uneven portion 41, the third uneven portion 51 and the fourth uneven portion 54 in locations where condensation water is likely to adhere depending on each rotational position of the flap 35 and which are difficult for the user to see, it is possible to maintain the design while suppressing the dripping of condensation water.

[0033] [1-3. Effects, etc.] As described above, this embodiment comprises an indoor unit body 14 having an air outlet 34, a fan provided within the indoor unit body 14, and a flap 35 rotatably supported on the indoor unit body 14 for opening and closing the air outlet 34, and a plurality of first uneven portions 40 are formed on the side wall 36 of the flap 35. This prevents the droplets of condensed water adhering to the side wall 36 of the flap 35 from coming into contact with each other and gathering together, and prevents the droplets of condensed water from becoming larger. Therefore, it is possible to prevent the condensed water adhering to the side wall 36 of the flap 35 from dripping.

[0034] In the present embodiment, the first uneven portion 40 is formed such that the grooves formed by the first uneven portion 40 extend in the thickness direction of the flap 35. This allows a greater number of first uneven portions 40 to be formed compared to when the first uneven portions 40 extend in a direction perpendicular to the thickness direction of the flap 35, thereby increasing the surface area of ​​the first uneven portions 40 and improving the effect of suppressing the dripping of condensation water.

[0035] In addition, in this embodiment, a plurality of second uneven portions 41 are formed on the side of the lower wing surface 38 of the flap 35, and the second uneven portions 41 are formed so that grooves formed by the second uneven portions 41 extend in the longitudinal direction of the lower wing surface 38. As a result, even if the condensation water adhering to the first uneven portion 40 flows onto the lower wing surface 38 of the flap 35, the condensation water can be held by the second uneven portion 41, and dripping of the condensation water can be suppressed. Although the lower wing surface 38 of the flap 35 can be seen by the user, the second uneven portion 41 is formed only on the side of the lower wing surface 38, so that the second uneven portion 41 is difficult for the user to see, and the design is not impaired.

[0036] In the present embodiment, the first uneven portion 40 and the second uneven portion 41 are formed continuously. As a result, the first uneven portion 40 and the second uneven portion 41 are formed continuously, so that condensation water adhering to the first uneven portion 40 flows to the second uneven portion 41, improving the effect of suppressing the dripping of condensation water on the side of the flap 35.

[0037] In addition, in this embodiment, the indoor unit main body 14 is provided with a decorative panel 30 arranged on the underside of the indoor unit main body 14, and the decorative panel 30 has an air outlet 34 formed therein and an inner wall surface facing the air outlet duct leading to the air outlet 34, and at least one surface of the inner wall surface has a plurality of third uneven portions 51 formed thereon, and the third uneven portions 51 are formed so that the grooves formed by the third uneven portions 51 extend in the vertical direction of the decorative panel 30. As a result, when the flap 35 is in a fully open state, condensed water is likely to adhere to the inner wall surface of the air outlet 34, but by forming the third uneven portion 51, it is possible to suppress the dripping of the condensed water.

[0038] In addition, in this embodiment, the decorative panel 30 has an outer wall surface 52 that is erected outside the air outlet 34, and a plurality of fourth uneven portions 54 are formed on the outer wall surface 52, and the grooves formed by the fourth uneven portions 54 extend in the vertical direction of the decorative panel 30. As a result, when the flap 35 is in a fully closed state, condensed water is likely to adhere to the outer wall surface 52, but by forming the fourth uneven portion 54, it is possible to suppress the dripping of the condensed water.

[0039] (Other embodiments) As described above, the first embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. Therefore, other embodiments will be exemplified below.

[0040] In the first embodiment, the first uneven portion 40 and the second uneven portion 41 are formed on both side walls 36 and both side portions of the lower wing surface 38 of the flap 35, respectively, but the present disclosure is not limited to this. For example, a plurality of fifth uneven portions may be formed at the front end of the flap 35, and a sixth uneven portion may be formed continuously to the fifth uneven portions at the front end of the lower wing surface 38 of the flap 35. The fifth uneven portion is formed so that the groove formed by the fifth uneven portion extends in the short direction of the leading edge portion of the flap 35, and the sixth uneven portion is formed so that the groove formed by the sixth uneven portion extends in the short direction of the lower wing surface 38 of the flap 35. This makes it possible to suppress the condensed water adhering to the front edge of the flap 35 from dripping.

[0041] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, and the like can be made within the scope of the claims or their equivalents. [Industrial Applicability]

[0042] INDUSTRIAL APPLICABILITY The present disclosure is applicable to ceiling-embedded indoor units for air conditioning that can suppress dripping of condensation water when condensation water adheres to a flap or around the air outlet in the cool air outlet portion. [Explanation of symbols]

[0043] 10 Ceiling-mounted indoor unit 14 Indoor unit body 15. Cabinet 17 Indoor heat exchanger 18 Blower 19 Drain pan 20 Bellmouth 23 Fan motor 30 Decorative Panel 34 Air outlet 35 Flap 36 side wall 37 Support shaft 38 Lower wing surface 39 Upper wing surface 40 First uneven part 41 Second uneven part 42 Side step 43 Front side step part 50 Downstream inner wall 51 Third uneven part 52 Exterior wall surface 53 Outer bottom surface 54 4th uneven part

Claims

1. A ceiling-embedded indoor unit including an indoor unit body having an air outlet, a fan provided in the indoor unit body, and a flap rotatably supported on the indoor unit body for opening and closing the air outlet, A plurality of first uneven portions are formed on the side wall of the flap, The first uneven portion is formed such that a groove formed by the first uneven portion extends in a thickness direction of the flap. Ceiling mounted indoor unit.

2. A plurality of second uneven portions are formed on the side of the lower wing surface of the flap, The second uneven portion is formed such that a groove formed by the second uneven portion extends in the longitudinal direction of the lower blade surface. The ceiling embedded type indoor unit according to claim 1.

3. The first uneven portion and the second uneven portion are formed continuously. The ceiling embedded type indoor unit according to claim 2.

4. The indoor unit body includes a decorative panel disposed on the underside of the indoor unit body, The decorative panel has an air outlet formed therein and an inner wall surface facing an air outlet path leading to the air outlet, A plurality of third concave-convex portions are formed on at least one surface of the inner wall surface, The third uneven portion is formed such that a groove formed by the third uneven portion extends in the up-down direction of the decorative panel. The ceiling embedded type indoor unit according to any one of claims 1 to 3.

5. The decorative panel has an outer wall surface erected outside the air outlet, A plurality of fourth uneven portions are formed on the outer wall surface, The fourth uneven portion has a groove extending in the up-down direction of the decorative panel. The ceiling embedded type indoor unit according to claim 4.

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