CN216204236U - Indoor unit of air conditioner - Google Patents

Abstract

An indoor unit of an air conditioner can blow air to a wider range and the conditioned air blown out from an air outlet is easy to circulate indoors. In a ceiling-suspended indoor unit, if the lower end of the end of a blowout path (73) extending from a heat exchanger (31) in a casing (33) toward an air outlet (75), said end being on the side of the heat exchanger (31) into which air flows, is defined as a first lower end (76), and the lower end of the end on the side of the air outlet (75) from which air flows out is defined as a second lower end (77), the height of the second lower end (77) is lower than the first lower end (76). The airflow direction adjustment blade (85) is provided so as to be able to adjust the airflow direction of the air blown out from the air outlet (75) to be more upward than horizontal.

Description

Indoor unit of air conditioner

Technical Field

The present disclosure relates to an indoor unit of an air conditioner.

Background

A ceiling-suspended indoor unit is known as an air conditioner indoor unit (hereinafter, also simply referred to as an indoor unit). The air conditioner includes a casing in which an intake port for taking in indoor air and an air outlet for blowing out conditioned air into a room are formed (see, for example, patent document 1). In this indoor unit, an air intake port is formed in the bottom surface of the rear part of the casing, and an air outlet port is formed in the front surface of the casing. A fan and a heat exchanger are arranged in this order between the air intake port and the air outlet port in the casing.

Patent document 1: japanese laid-open patent publication No. 2010-249447

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by Utility model

In the indoor unit of patent document 1, a wind direction adjustment vane that is bent downward in the air flow direction is provided at an air outlet port located immediately behind the heat exchanger in the air flow direction, and blows out air obliquely downward. In this configuration, even if the outlet angle is set to the upper limit of the adjustable range, the air is less likely to reach a place far from the indoor unit. As a result, the conditioned air is difficult to circulate indoors.

The purpose of this disclosure lies in: provided is a ceiling-suspended indoor unit that can blow air over a wider range and in which conditioned air blown out from an air outlet is easily circulated indoors.

Technical solution for solving technical problem

In the aspect of the present disclosure, terms indicating the direction and the position of the components of the indoor unit indicate the direction and the position in a state where the indoor unit is installed in the air-conditioned space.

The disclosure of the first aspect is premised on a ceiling-suspended air conditioner indoor unit including a casing 33, a heat exchanger 31, a fan 32, and an airflow direction adjustment blade 85. The casing 33 has a plurality of side plates 34, and an air outlet 75 is formed in one of the side plates 34; the heat exchanger 31 is arranged inside the housing 33; the fan 32 blows out the air having passed through the heat exchanger 31 from the air outlet 75 to the side of the casing 33; the airflow direction adjustment blade 85 is provided in the air outlet 75.

The ceiling suspension type air conditioner indoor unit includes an air outlet passage 73 extending from the heat exchanger 31 toward the air outlet 75. If the lower end of the outlet air path 73 on the heat exchanger 31 side into which air flows is defined as a first lower end 76, and the lower end of the outlet air path 73 on the air outlet 75 side out of which air flows out is defined as a second lower end 77, the second lower end 77 is located lower than the first lower end 76 in the height direction. The airflow direction adjustment vane 85 can adjust the airflow direction of the air flowing out of the blowout passage 73 to be more upward than horizontal.

In the disclosure of the first aspect, since the blow-out passage 73 is provided on the downstream side of the heat exchanger 31 in the air flow direction, the air flowing out of the heat exchanger 31 is rectified in the blow-out passage 73 and is not diffused. In the first disclosure, the blowing direction of the air rectified in the blowing passage 73 is adjusted by the airflow direction adjustment vane 85. If the wind direction adjustment vane 85 is provided immediately behind the heat exchanger 31 in the air flow direction, it is difficult to adjust the flow direction of the diffused air. In contrast, in the disclosure of the first aspect, the air is rectified in the air outlet passage 73, and then the air outlet direction is adjusted by the airflow direction adjustment vane 85, so that the airflow direction can be easily adjusted.

In the disclosure of the first aspect, since the second lower end 77 of the outlet passage 73 is made lower than the first lower end 76 and the outlet passage 73 extends downward, the ceiling-suspended indoor unit can blow out air upward by adjusting the angle of the airflow direction adjustment vane 85 in addition to blowing out air downward from the air outlet 75. Further, by blowing the air upward, the air can be blown out to a wider range. The conditioned air is easily taken to a further place from the indoor unit and is easily circulated indoors.

A second aspect of the disclosure is the ceiling-suspended air conditioner indoor unit according to the first aspect, wherein:

the blowoff passage 73 has a bottom surface portion 78 located at the bottom of the blowoff passage 73,

the bottom surface portion 78 has a downstream bottom portion 78a on the downstream side in the air flow direction of the blowout passage 73,

the second lower end 77 is located at the same height as the lowermost end of the downstream bottom 78a in the height direction, or is located above the downstream bottom 78 a.

In this configuration, "downstream bottom portion 78 a" is a portion of the bottom surface of the outlet passage 73 that is located within a predetermined range including the downstream opening end in the air flow direction.

In the disclosure of the second aspect, the second lower end 77 is located below the first lower end 76, and the downstream bottom 78a, which is the portion on the downstream side in the air flow direction in the bottom portion 78 of the air outlet passage 73

The lowermost end is at the same height as the second lower end 77, or the second lower end 77 is higher. According to this configuration, if the air flowing along the bottom surface portion 78 of the outlet passage 73 flows downward in the outlet passage 73 and then passes through the lowermost end, the air can be blown out with the flow direction being horizontal or upward. According to this configuration, the blowing direction of the air can be easily made upward and stable in conjunction with the airflow direction adjustment vane 85 that can adjust the airflow direction of the air flowing out from the blowing passage 73 to be more horizontally upward. Therefore, the conditioned air easily reaches a further place from the indoor unit, and the conditioned air easily circulates in the room.

A third aspect of the present invention is the ceiling-suspended type air conditioner indoor unit according to the first or second aspect, wherein:

the blowoff passage 73 has a bottom surface portion 78 located at the bottom of the blowoff passage 73 and an upper surface portion 79 opposed to the bottom surface portion 78,

at least a part of the bottom surface portion 78 and/or the upper surface portion 79 is formed of a curved surface that curves from the air inflow side toward the air outflow side.

In the disclosure of the third aspect, at least a part of the bottom surface portion 78 and/or the upper surface portion 79 is formed into a curved surface, whereby the air flows smoothly. With this configuration, the flow straightening effect in the blowing passage 73 can be improved.

A fourth aspect of the disclosure is the ceiling suspension type air conditioner indoor unit of any one of the first to third aspects of the disclosure, wherein:

the housing 33 includes therein a drain pan 35 that receives drain water produced in the heat exchanger 31,

the blowoff passage 73 is arranged on the downstream side of the outer edge 37 of the drain pan 35 in the air flow direction.

In the disclosure of the fourth aspect, the air having passed through the heat exchanger 31 flows into the blowing passage 73 after passing through the outer edge 37 of the drain pan 35. According to this configuration, the air can be rectified by the outlet passage 73 on the downstream side of the heat exchanger 31.

Further, if a part of the upstream side of the blowing passage 73 in the air flow direction is located upstream of the outer edge 37 of the drain pan 35 in the air flow direction, the two parts overlap each other in a plan view. In this case, the height of the indoor unit may be increased so that the outlet passage 73 and the drain pan 35 are displaced in the height direction of the indoor unit. In contrast, in the disclosure of the fourth aspect, the outlet passage 73 does not need to be displaced from the drain pan 35 in the height direction of the indoor unit, and the height dimension of the indoor unit can be suppressed.

A fifth aspect of the disclosure is the ceiling suspension type air conditioner indoor unit of any one of the first to fourth aspects of the disclosure, wherein:

the upper surface of the wind direction adjustment vane 85 in a state where the wind direction is adjusted to be more upward than horizontal is a flat surface.

If the airflow direction adjustment vane 85 is bent downward in accordance with the flow of the air, the angle of the air blown out from the air blowing passage 73 can be easily adjusted downward, but it is difficult to blow the air upward. In the disclosure of the fifth aspect, the upper surface of the wind direction adjustment blade 85 in a state where the wind direction is adjusted to be more upward than horizontal is a flat surface. Therefore, in the airflow direction adjustment vane 85, it is easy to direct the air blown out from the blowout passage 73 both downward and upward. Specifically, if the airflow direction adjustment vane 85 is angularly adjusted downward, the air flowing from the first lower end 76 to the second lower end 77 in the air outlet passage 73 can be blown downward. If the airflow direction adjustment vane 85 is angularly adjusted upward, the air flowing from the first lower end 76 to the second lower end 77 in the blowing passage 73 easily ascends the flat upper surface of the airflow direction adjustment vane 85 to change the direction to the upward direction. Therefore, the wind direction can be easily adjusted to the downward direction and the upward direction by the wind direction adjustment vane 85.

A sixth aspect of the present invention is the ceiling suspension type air conditioner indoor unit of any one of the first to fifth aspects of the present invention, wherein:

the airflow direction adjustment vane 85 has a plurality of vane members 86 extending in a direction intersecting the air flow direction of the outlet passage 73 and intersecting the vertical direction,

the plurality of blade members 86 are arranged one above the other.

In the disclosure of the sixth aspect, by using the plurality of blade members 86 arranged up and down, the wind direction can be adjusted from the lower portion to the upper portion of the blowout passage 73. In addition, when a plurality of blade members 86 of about 4 to 5 pieces are used, the wind direction can be easily adjusted as compared with a case where the number of blade members 86 is small, such as 1 piece.

A seventh aspect of the present invention is the ceiling suspension type air conditioner indoor unit of any one of the first to sixth aspects, wherein:

assuming that the horizontal direction is 0 °, the wind direction adjustment blade 85 can adjust the wind direction to an angle range of more than 0 ° and 10 ° or less upward from the horizontal direction.

In the disclosure of the seventh aspect, the direction of the air blown out from the blow-out passageway 73 can be adjusted within a range from horizontal to 10 ° upward by the airflow direction adjusting blade 85. If the blow-out angle is larger than 10 °, the angle becomes too steep, and the air is difficult to reach a further place from the indoor unit, and the conditioned air is difficult to circulate indoors. In contrast, according to the seventh aspect of the present invention, the occurrence of such a problem can be suppressed. In addition, since the angle range is greater than 0 ° and 10 ° or less, the blown air is less likely to hit the ceiling of the room. If the blown air hits the ceiling in the room, the ceiling is easily contaminated, but according to the seventh aspect, the contamination of the ceiling can be suppressed.

An eighth aspect of the present invention is the ceiling suspension type air conditioner indoor unit of any one of the first to seventh aspects, wherein:

the wall surface constituting the blow-out passage 73 has a projecting portion 80a formed by projecting downward the upper portion of the downstream side opening portion of the wall surface in the air flow direction,

the extension portion 80a extends in a direction intersecting with the air flow direction of the outlet passage 73 and intersecting with the vertical direction.

In the disclosure of the eighth aspect, the air blown out from the upper portion of the blowout path 73 easily bends along the extension portion 80a to flow downward. Therefore, when the air is blown out downward from the air outlet 75, the flow of the air is stabilized.

A ninth aspect of the disclosure is the ceiling suspension type air conditioner indoor unit of any one of the first to eighth aspects, wherein:

an air intake port 60 is formed in the side plate 56 of the casing 33, which is opposed to the side plate 81 in which the air outlet 75 is formed.

In the ninth aspect of the disclosure, the air outlet 75 and the air inlet 60 are formed in the side plates 81, 56 of the casing 33 that face each other. The air sucked from the air suction port 60 flows toward the air blow-out port 75 on the opposite side plate 81, and is blown out from the casing 33. In the ninth aspect of the disclosure, since the air flows in one direction in the housing 33, the air is less likely to receive resistance in the interior of the housing 33 and flows easily in the housing 33.

A tenth aspect of the present invention is the ceiling suspension type air conditioner indoor unit of any one of the first to ninth aspects of the present invention, wherein:

the housing 33 includes a first housing 51 and a second housing 71,

the first housing 51 is provided with the heat exchanger 31 and the fan 32;

the second casing 71 has the air outlet path 73 and the air outlet 75, and the second casing 71 is attached to the first casing 51.

Drawings

Fig. 1 is a refrigerant circuit diagram schematically showing the configuration of an air conditioner;

fig. 2 is a perspective view of the indoor unit of the embodiment viewed from obliquely above the front surface side;

fig. 3 is a plan view of the indoor unit;

FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3;

fig. 5 is a perspective view of the blowing unit viewed from obliquely above from the front;

FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5;

fig. 7 is a partially cutaway perspective view of the blowout unit viewed obliquely from above on the back side;

fig. 8 is a sectional view showing the general sectional shape of the blowout passage and the behavior of the airflow direction adjusting blade;

FIG. 9 is an enlarged cross-sectional perspective view showing the shape of the blade member;

fig. 10 is a cross-sectional view showing the approximate shape of the blow-out passage of modification 1 of the first embodiment;

fig. 11 is a cross-sectional view showing the approximate shape of the blow-out passage in modification 2 of the first embodiment;

fig. 12 is a cross-sectional view of an indoor unit according to modification 3 of the first embodiment;

fig. 13 is a perspective view of the indoor unit according to the second embodiment as viewed from obliquely above the front surface side;

fig. 14 is a sectional view taken along line XIV-XIV in fig. 13.

Detailed Description

(first embodiment)

The first embodiment will be explained. The air conditioner 10 of the present embodiment includes an indoor unit 30 and an outdoor unit 20 connected thereto, and conditions air in an indoor space to be air-conditioned. In the present specification, terms indicating directions and positions such as "upper", "lower", "right", "left", "lateral", "top plate", "bottom plate", "side plate", "front surface", "back surface" and the like all refer to directions and positions obtained when the indoor unit 30 in the installed state is viewed from the front side (front surface side). In addition, in the present specification, "opposite" means that the side plates are equally opposite to each other, and is not meant to be parallel.

-air conditioning device-

The air-conditioning apparatus 10 will be described with reference to fig. 1 to 9.

As shown in fig. 1, the air conditioner 10 includes an indoor unit 30 and an outdoor unit 20. In the air conditioner 10, the compressor 21, the four-way selector valve 22, the outdoor heat exchanger 23, the expansion valve 24, and the indoor heat exchanger 31 are connected by refrigerant pipes to constitute the refrigerant circuit 11 that performs a vapor compression refrigeration cycle.

The refrigerant circuit 11 includes an outdoor circuit 12, an indoor circuit 13, a first connection pipe 14 on the liquid side, and a second connection pipe 15 on the gas side. The first connecting duct 14 is connected to a first normally closed valve 16 of the outdoor circuit 12 and a first duct junction 18 of the indoor circuit 13. The second connection pipe 15 is connected to a second normally closed valve 17 of the outdoor circuit 12 and a second pipe joint 19 of the indoor circuit 13.

Approximate constitution of indoor unit

The indoor unit 30 is installed in an indoor space to be air-conditioned, and includes an indoor heat exchanger 31, an indoor fan 32, and a drain pan 35.

The indoor heat exchanger 31 exchanges heat between the refrigerant flowing inside the indoor heat exchanger and the indoor air supplied from the indoor fan 32. The indoor heat exchanger 31 is constituted by, for example, a fin-and-tube heat exchanger. The indoor heat exchanger 31 constitutes a heat exchanger of the present disclosure.

The indoor fan 32 supplies indoor air to the indoor heat exchanger 31, and also supplies air having passed through the indoor heat exchanger 31 to the indoor space. The indoor fan 32 constitutes a fan of the present disclosure.

Approximate structure of outdoor unit

The outdoor unit 20 is installed outdoors, and includes a compressor 21, a four-way selector valve 22, an outdoor heat exchanger 23, an outdoor fan 25, an expansion valve 24, a first normally-closed valve 26 on the liquid side, and a second normally-closed valve 27 on the gas side.

The compressor 21 sucks in the low-pressure gas refrigerant flowing out of the heat exchanger functioning as an evaporator of the indoor heat exchanger 31 and the outdoor heat exchanger 23, compresses the refrigerant, and discharges the high-temperature high-pressure gas refrigerant. The high-pressure gas refrigerant discharged from the compressor 21 flows into the heat exchanger functioning as a radiator of the indoor heat exchanger 31 and the outdoor heat exchanger 23.

The four-way selector valve 22 is used to reversibly switch the direction of flow of the refrigerant in the refrigerant circuit 11. Specifically, the four-way selector valve 22 is switchable between a first state (indicated by solid lines in fig. 1) in which the indoor heat exchanger 31 serves as an evaporator and the air-conditioning apparatus 10 is performing a cooling operation, and a second state (indicated by broken lines in fig. 1) in which the indoor heat exchanger 31 serves as a radiator and the air-conditioning apparatus 10 is performing a heating operation.

The outdoor heat exchanger 23 exchanges heat between the refrigerant flowing inside the outdoor heat exchanger and outdoor air supplied from the outdoor fan 25. The outdoor heat exchanger 23 is constituted by, for example, a fin-and-tube heat exchanger.

The outdoor fan 25 is used to supply outdoor air to the outdoor heat exchanger 23.

The expansion valve 24 is used to reduce the pressure of the refrigerant flowing out of the heat exchanger functioning as a radiator of the indoor heat exchanger 31 and the outdoor heat exchanger 23. The expansion valve 24 is constituted by, for example, an electronic expansion valve whose opening degree is adjustable.

Concrete structure of indoor unit

The indoor unit 30 of the present embodiment is a ceiling-suspended indoor unit, and is installed near the ceiling of an indoor space. Here, the indoor unit 30 of the present embodiment will be described with reference to fig. 2 to 4 as appropriate.

As shown in fig. 2 to 4, the entire indoor unit 30 is formed in a flat rectangular parallelepiped shape. The indoor unit 30 includes a main body unit 50, a blowout unit 70, and a pair of decorative covers 91, 92. An air suction inlet 60 is formed in the main body unit 50, and the air suction inlet 60 is used to suck air of the indoor space into the main body unit 50. The air outlet unit 70 is provided with an air outlet 75, and the air outlet 75 is used to supply the conditioned air having passed through the indoor heat exchanger 31 to the indoor space by blowing the conditioned air to the side (front) of the indoor unit 30.

As described later, the main body unit 50 has a first housing 51, and the blowout unit 70 has a second housing 71. The first casing 51 and the second casing 71, which are independent of each other, constitute the entire casing 33 of the indoor unit 30 of the present embodiment.

The entire housing 33 has a plurality of side plates 34. Among them, side plate 34 provided with air intake port 60 faces side plate 34 provided with air outlet port 75. In the present disclosure, the entire housing 33 is also simply referred to as a housing. In the present disclosure, the top plate, the bottom plate, and the side plates of the first casing 51 are denoted as "first top plate, first bottom plate, and first side plate", and are distinguished from the top plate, the bottom plate, and the side plates of the entire casing (the symbols are omitted).

Main unit

The main body unit 50 has a first housing 51 of a rectangular parallelepiped shape. The first housing 51 has a frame, not shown, a first top plate 52 attached to the frame, a first bottom plate 53, and a plurality of first side plates 54 arranged between the first top plate 52 and the first bottom plate 53. The first top plate 52 is a plate-like member that constitutes the upper surface of the first casing 51 in the attached state of the indoor unit 30, and constitutes a part of the top plate 34a of the casing 33. The first bottom plate 53 is a plate-like member that constitutes the lower surface of the first casing 51 in the attached state of the indoor unit 30, and constitutes a part of the bottom plate 34b of the casing 33. Of the four first side plates 54 of the main unit 50, one side surface of a pair of side surfaces along the long side in plan view is a front surface, and the other side surface is a back surface; one side surface of a pair of side surfaces along the short side in a plan view is a right side surface, and the other side surface is a left side surface.

The first side plate 54 of the main unit 50 includes a first front panel 55 located on the front surface side in the installed state of the indoor unit 30, a first back panel 56 located on the back surface side, a first right panel 57 located on the right side surface, and a first left panel 58 located on the left side surface 52. The first back panel 56 and the first front panel 55 are opposed to each other. The first right panel 57 and the first left panel 58 are opposed to each other.

In fig. 4, the main body unit 50 is provided with an air intake port 60 in the first back surface plate 56, and an air outlet port 59 in the first front surface plate 55 facing the first back surface plate 56. An air passage 61 is formed inside the main body unit 50 from the air suction port 60 to the air outlet 59. The indoor heat exchanger 31, the indoor fan 32, and the drain pan 35 are housed in the air passage 61 in the main unit 50. Between the air suction port 60 and the air outflow port 59 in the air passage 61, the indoor heat exchanger 31 is disposed on the downstream side of the wind with reference to the indoor fan 32.

The indoor heat exchanger 31 is provided to extend in the left-right direction of the main unit 50. As shown in fig. 4, the indoor heat exchanger 31 is arranged such that both heat exchange surfaces thereof are angled with respect to each other, and the indoor heat exchanger 31 has an inclined "L" shape in side view.

As shown in fig. 4, the drain pan 35 is provided inside the first housing 51, disposed above the first bottom plate 53. The drain pan 35 is formed of a foamed resin, and receives drain water (condensed water) generated in the indoor heat exchanger 31. The drain pan 35 has a drain pan bottom 36 having a rectangular surface for receiving drain water when viewed from above, and an upright portion 37 formed at an outer edge portion of the drain pan bottom 36. The outer edge of the drain pan bottom 36 is an edge portion along the outer periphery of the drain pan bottom 36.

Blow-out unit

As shown in fig. 2 to 5, the blowing unit 70 is formed in a rectangular parallelepiped shape having a long lateral length and is attached to the front surface of the main body unit 50. The blowing unit 70 has a second casing 71, and the second casing 71 is attached to the first casing 51 such that the back surface thereof contacts the first front panel 55 of the main body unit 50.

As shown in fig. 4 and 5, a passage member 72 that forms a blowing passage 73 is provided inside the blowing unit 70. An air inlet 74 that communicates with the air outlet 59 of the first casing 51 and through which conditioned air passes is formed on the rear surface side of the second casing 71 in the blowing unit 70. An air outlet 75 for blowing out conditioned air is formed in the front surface member 81 of the blowing unit 70 having a front surface 81a facing the rear surface.

Blow-out passage

In fig. 4 and 6 to 8, the outlet passage 73 is a passage extending obliquely downward from the indoor heat exchanger 31 and the air inlet 74 toward the entire air outlet 75, and is formed in the passage member 72 made of foamed resin. An air inlet 74 is formed at an upstream end of the outlet passage 73 in the air flow direction, and an air outlet 75 is formed at a downstream end. The blow-out passage 73 is arranged entirely on the outer edge of the drain pan 35 in the air flow direction, i.e., on the downstream side of the standing portion 37.

As shown in fig. 8, the outlet passage 73 has a first lower end 76 at the lower end of the air inlet 74, which is the opening end on the indoor heat exchanger 31 side, and a second lower end 77 at the lower end of the opening end on the air outlet 75 side. The second lower end 77 is located lower than the first lower end 76 in the height direction. The entire outlet passage 73 extends gradually obliquely downward from the indoor heat exchanger 31 and the air inlet 74 toward the air outlet 75, and the first lower end 76 and the second lower end 77 have a height difference of Δ h.

The outlet duct 73 has a bottom surface portion 78 located at the bottom of the outlet duct 73 and an upper surface portion 79 facing the bottom surface portion 78 in the installed state of the indoor unit 30. As shown in fig. 7, which is a partial sectional perspective view of the blowing unit 70 when viewed from the rear side, the opening of the blowing passage 73 or the cross-sectional shape substantially perpendicular to the air flow direction is rectangular, and two side surfaces 82 are provided between the bottom surface portion 78 and the upper surface portion 79. Fig. 6 and 7 show only one side 82.

Of the bottom surface portion 78 and the upper surface portion 79, the end portion of the upper surface portion 79 on the air inlet side is formed of a curved surface. In this way, at least a part of the bottom surface portion 78 and/or the upper surface portion 79 is formed of a curved surface that curves from the air inflow side toward the air outflow side.

An inclined portion 83 is formed at an end portion of the bottom surface portion 78 of the outlet passage 73 on the side closer to the air outlet 75, and the inclined portion 83 is inclined and stepped in a direction in which the opening area of the air outlet 75 is increased. A horizontal blowout surface 84a is formed at an end portion of the bottom surface portion 78 of the blowout passage 73 on the side closer to the inclined portion 83. The term "horizontal" as used herein includes a state in which the blow-out surface 84a is slightly inclined, in addition to a state in which the blow-out surface is at right angles to the vertical plane.

Wind direction regulating blade

An airflow direction adjustment blade 85 is provided at the air outlet 75, the airflow direction adjustment blade 85 is configured by a plurality of (4 in the present embodiment) blade members 86, and the blade members 86 are formed of synthetic resin. Each blade member 86 is a plate-like member and has an elongated rectangular shape. Each blade member 86 is arranged so as to intersect the air outlet 75 in the left-right direction with its longitudinal direction substantially horizontal (see fig. 2, 5 to 7). Here, "substantially horizontal" means a direction orthogonal to the air flow direction and also orthogonal to the vertical direction, but may include a direction slightly inclined. The term "orthogonal" as used herein does not necessarily include a right angle, but includes a slightly inclined state. The 4 blade members 86 are arranged in the up-down direction with equal intervals maintained therebetween. Both end portions of each blade member 86 in the longitudinal direction are rotatably supported by the side surface 82 of the second housing 71. Each blade member 86 is rotatable within a predetermined angular range about a rotation axis C extending in the longitudinal direction thereof. The airflow direction adjustment vane 85 closes the air outlet 75 in a state where the indoor unit 30 is not yet in operation. The term "closed" as used herein may be a state with a slight gap.

In the blowing unit 70, if the vane members 86 are driven by a motor (not shown) for adjusting the wind direction, the vane members 86 rotate about the rotation axis C, and the angles of the vane members 86 change, as shown in fig. 8. Each blade member 86 guides the air blown out from the blowing passage 73. Therefore, if the angle of each blade member 86 changes, the direction of the air blown out from the blowing passage 73 changes in the vertical direction.

Each blade member 86 is configured to: the direction of the air flowing out of the outlet duct 73 can be adjusted within a range from a predetermined angle below the horizontal to a predetermined angle above the horizontal in a state where the indoor unit 30 is installed. In the present embodiment, assuming that the horizontal direction is 0 °, the angle range θ 1 of the blade members 86 that can be adjusted to be higher than the horizontal direction is greater than 0 ° and 10 ° or less. As described above, each blade member 86 is configured to be able to adjust the wind direction to be downward from the horizontal, and the angular range θ 2 is set to 0 ° to 55 °.

Fig. 9 shows a sectional shape of the blade member 86. As shown in fig. 9, each blade member 86 is formed of a plate-like member whose front and back surfaces are not curved surfaces but flat surfaces. In a state where air is blown out from the air outlet 75 at an angle upward from the horizontal, the front and back surfaces of each blade member 86 are the upper and lower surfaces of each blade member 86. Therefore, in a state where the blade members 86 are set at the upward blowing angle, both the upper and lower surfaces of the blade members 86 are flat surfaces that are not curved. In the present disclosure, the upper surface of each blade member 86 may be flat. In a state where the air outlet 75 is closed, the upper and lower edge portions of each vane member 86 are formed by the inclined surfaces 86a where the adjacent vane members 86 overlap with each other.

A plurality of minute grooves 87 extending parallel to the longitudinal direction of the blade member 86 are formed on the rear surface of each blade member 86 after the air outlet 75 is closed. In a state where the air outlet 75 is opened, the surface on which the groove 87 is formed is the lower surface. Therefore, even if the dew condensation water adheres to the vane member 86 during the cooling operation of the indoor unit 30, the dew condensation water is accumulated in the grooves 87. In the present embodiment, a plurality of minute grooves 87 are provided on the lower surface of each blade member 86 in a state where the air outlet 75 is opened.

The airflow direction adjustment blade 85 may be formed of 3 or fewer blade members 86, or may be formed of 5 or more blade members 86. The grooves 87 of the blade member 86 may be formed in a concave-convex shape, and the grooves 87 of the blade member 86 may be formed not in parallel but in both surfaces of the blade member 86 or only in the surface opposite to that in fig. 9.

Decoration cover

The decorative covers 91 and 92 are box-shaped members each having a long and narrow rectangular parallelepiped shape. One of the long side surfaces and the back surface of the decorative covers 91 and 92 are open. The lengths of the trim covers 91 and 92 are substantially equal to the length from the back surface of the main body unit 50 to the front surface of the blowout unit 70.

The decorative covers 91 and 92 are attached to the main unit 50 so that the open side faces face the main unit 50, and cover both the side faces of the main unit 50 and the side faces of the outlet unit 70. The right trim cover 91 disposed on the right side of the body unit 50 covers the right panel 57 of the body unit 50 and the right panel of the blowout unit 70. The left trim cover 92 disposed on the left side of the body unit 50 covers the left panel 58 of the body unit 50 and the left panel of the blowout unit 70. The right and left trim covers 91, 92 are configured to be slidable in the front-rear direction of the entire housing 33. The right and left trim covers 91, 92 are attached to the entire housing 33 by sliding the right and left trim covers 91, 92 from the front to the rear to predetermined positions. In contrast, the right and left trim covers 91, 92 are detached from the entire housing 33 by sliding the right and left trim covers 91, 92 from the rear toward the front.

Operational condition

The air conditioner 10 selectively performs a cooling operation and a heating operation.

In the cooling operation, the four-way selector valve 22 is set to the first position, and the refrigerant circulates through the refrigerant circuit 11. The outdoor heat exchanger 23 functions as a radiator, and the indoor heat exchanger 31 functions as an evaporator. The indoor unit 30 cools air drawn from the indoor space in the indoor heat exchanger 31, and then blows the cooled air to the indoor space.

In the heating operation, the four-way selector valve 22 is set to the second position, and the refrigerant circulates through the refrigerant circuit 11. The indoor heat exchanger 31 functions as a radiator, and the outdoor heat exchanger 23 functions as an evaporator. The indoor unit 30 heats air drawn from the indoor space in the indoor heat exchanger 31, and then blows the heated air to the indoor space.

Flow condition of blown air during operation

When the indoor unit 30 is operated, the indoor fan 32 is started, and the air sucked into the entire casing 33 from the air inlet 60 passes through the indoor heat exchanger 31 and becomes conditioned air. The conditioned air passes through the indoor heat exchanger 31, and then is rectified by the blow-off passage 73 so as not to be diffused. The blown air rectified by the blowing passage 73 is blown out toward the front (side) of the entire casing 33 from an air outlet 75 provided at an opening end on the outlet side of the blowing passage 73.

If the airflow direction adjustment vane 85 is set to the range of the blowing angle θ 1 (for example, 5 ° upward), the conditioned air is blown out more horizontally upward along the airflow direction adjustment vane 85. At this time, the conditioned air gently flowing down obliquely downward along the blowing passage 73 passes through the horizontal blowing surface 84a and then transitions to the airflow direction adjustment vane 85. Since the angles of the transition portion 78a of the bottom surface portion 78 of the outlet passage 73 toward the outlet surface 84a, and the airflow direction adjustment blade 85 gradually change, the conditioned air smoothly flows through these portions and is then blown out from the air outlet 75. Since each blade member 86 is formed in a flat plate shape, the air flowing through the blowout passages 73 easily gets on each blade member 86, and the flow direction smoothly changes upward.

The conditioned air blown out upward from the air outlet 74 at an angle θ of 5 ° (an angle range of 10 ° or less larger than 0 °), for example, reaches a place away from the indoor unit 30. For example, it is assumed that the indoor space in which the indoor unit 30 is provided is not particularly large with respect to the air conditioning capacity. In this case, if the indoor unit 30 is installed at a position close to one wall surface of the room, the air after conditioning is likely to reach the wall surface on the side opposite to the wall surface on which the indoor unit 30 is installed by performing the angle setting. As soon as the air reaches the wall, it will fall along the wall. On the other hand, since the indoor air is sucked into the entire casing 33 from the rear surface of the indoor unit 30, the indoor air rises along the wall surface on which the indoor unit 30 is installed. As described above, in the room, the air flow directed in the lateral direction in which the air blown out from the indoor unit 30 reaches the wall surface on the opposite side away from the indoor unit, the air flow descending along the wall surface on the opposite side to the wall surface on which the indoor unit 30 is provided, and the air flow ascending along the wall surface on the side on which the indoor unit 30 is provided are generated. Therefore, air is easily circulated in the room. As a result, temperature unevenness of the indoor air during operation can be suppressed.

When the indoor unit 30 is operated, the conditioned air can be made to reach a further place by setting the air volume of the indoor fan 32 to the maximum air volume. Therefore, the air flow circulating in the room is easily formed. Therefore, when the indoor unit 30 is operated with the conditioned air blown out upward, the air volume of the indoor fan 32 is preferably set to the maximum air volume.

Effects of the first embodiment

In the present embodiment, the indoor unit 30 is provided with the outlet passage 73 extending from the indoor heat exchanger 31 toward the air outlet 75. Further, the structure is: in the height direction, a second lower end 77, which is a lower end of the end portion on the air outlet 75 side from which the air flows out, of the end portions of the outlet passage 73, is located below a first lower end 76, which is a lower end of the end portion on the heat exchanger 31 side into which the air flows. Further, the indoor unit 30 is provided with an airflow direction adjustment vane 85 capable of adjusting the airflow direction of the air flowing out of the outlet passage 73 to be more upward than horizontal.

Here, if the airflow direction adjustment blade 85 is provided only in the air outlet 75 without providing a passage for rectifying the air in the configuration in which the air outlet 75 is located on the downstream side of the indoor heat exchanger 31 in the air flow direction, the air that has passed through the indoor air 31 is easily diffused even if the blowing angle is set to be upward. In this case, the air blown out from the indoor air 31 is difficult to reach a place far from the indoor unit. Therefore, the conditioned air is difficult to circulate indoors.

In the present embodiment, since the outlet passage 73 is provided downstream of the indoor heat exchanger 31 in the air flow direction, the air flowing out of the indoor heat exchanger 31 passes through the outlet passage 73 without being diffused. The air is rectified in the blow-out passage 73 between the first lower end 77 and the second lower end 78 and flows down in one direction. The blowing direction of the air rectified in the blowing passage 73 is adjusted by the airflow direction adjustment vane 85. Thus, in the present embodiment, the air is rectified in the air outlet passage 73, and the air outlet direction is adjusted by the airflow direction adjustment vane 85, so that the airflow direction can be easily adjusted. Further, since the horizontal blowing surface 84a is formed at the outlet-side end portion of the bottom surface portion 78 of the blowing passage 73, the air flows through the downward blowing passage 73, the horizontal blowing surface 84a, and the upward airflow direction adjustment vane 85, which are located upstream of the blowing surface 84a, in this order, and the flow direction smoothly changes to the upward direction. In this way, the conditioned air after rectification is blown upward, and therefore the conditioned air easily reaches a further place from the indoor unit 30, and is easily circulated indoors. As a result, the variation in the indoor temperature during the air conditioning operation can be suppressed.

In addition, according to the present embodiment, since the second lower end 77 of the outlet passage 73 is lower than the first lower end 76, the entire outlet passage 73 is inclined downward from the inlet side toward the outlet side. Therefore, in the ceiling-suspended indoor unit, if the airflow direction adjustment vane 85 is configured so that the downward blowing angle can be adjusted, it is easy to blow air downward from the air outlet 75. In particular, the downward blowing angle can be easily made larger than the upward blowing angle.

In addition, according to the present embodiment, a part of the upper surface portion of the blowout path 73 is configured by a curved surface that curves from the inflow side toward the outflow side of the air. If the surfaces constituting the outlet passage 73 are all flat surfaces, the bent portions connecting the flat surfaces become points of separation of air, but by using the curved surfaces, separation of air is less likely to occur, and air flows smoothly through the outlet passage 73.

In the present embodiment, the blow-out passage 73 is disposed on the downstream side of the outer edge 37 of the drain pan 35 in the air flow direction. With this configuration, the air having passed through the indoor heat exchanger 31 passes through the outer edge 37 of the drain pan 35 and then flows into the outlet passage 73. Therefore, the air is easily rectified by the outlet passage 73 on the downstream side of the indoor heat exchanger 31.

Further, if a part of the outlet passage 73 is located upstream of the outer edge 37 of the drain pan 35 in the air flow direction, the two parts overlap each other in a plan view. In this case, in order to shift the outlet passage 73 from the drain pan 35 in the height direction of the indoor unit 30, the height dimension of the indoor unit 30 may be increased. In contrast, in the present embodiment, the entire blow-out passage 73 is disposed on the outer edge of the drain pan 35, i.e., on the downstream side of the standing portion 37 in the air flow direction. With this configuration, it is not necessary to shift the outlet passage 73 from the drain pan 35 in the height direction of the indoor unit 30, and the height dimension of the indoor unit can be reduced.

Here, if the airflow direction adjustment blade 85 is bent, for example, downward along the flow of air in a state where the air outlet 75 is opened, the angle of the air blown out from the air outlet passage 73 is easily adjusted downward, but it is difficult to blow the air upward. In the present embodiment, the airflow direction adjustment vane 85 is flat, and both the upper surface and the lower surface of the airflow direction adjustment vane 85 are flat surfaces in a state where the air outlet 75 is opened. When the flat plate-like airflow direction adjustment vane 85 is angularly adjusted downward, the air flowing from the first lower end 76 to the second lower end 77 in the blowing passage 73 can be adjusted downward within the angular range θ 2 and blown out. When the planar airflow direction adjustment vane 85 is angularly adjusted upward, as shown in fig. 8, the air flowing through the blowing passage 73 easily moves up the upper surface of the planar airflow direction adjustment vane 85 and changes its direction, and therefore the upward angular adjustment is easily performed. As described above, according to the present embodiment, the airflow direction can be easily adjusted both when the air blown out from the air outlet passage 73 is directed downward and when the air is directed upward. Therefore, in the present embodiment, the following operations can be performed: in the normal operation, conditioned air is blown downward from the indoor unit 30, and when a certain amount of time has elapsed, air is blown upward from the indoor unit 30 to circulate the indoor air.

In the present embodiment, the airflow direction adjustment vane 85 includes a plurality of vane members 86 extending in a direction intersecting the air flow direction of the outlet passage 73 and intersecting the vertical direction, and the plurality of vane members 86 are arranged vertically. According to this configuration, the direction of the wind can be adjusted from the lower portion to the upper portion of the blowing duct 73 by using the plurality of blade members 86 arranged vertically. In addition, compared to a configuration using a small number of blade members 86, if a plurality of blade members 86 of about 4 are used, the wind direction can be easily adjusted. In the present embodiment, the upper and lower edge portions of each blade member 86 are formed by the inclined surfaces 86a, with which the adjacent blade members 86 overlap when the air outlet 75 is closed. Therefore, it is possible to make it possible for the vane members 86 to be present when the air outlet 75 is closed

The gap formed therebetween is closed, and the appearance of the indoor unit 30 can be improved.

In the present embodiment, assuming that the horizontal direction is 0 °, the wind direction adjustment blade 85 can adjust the wind direction to an angle range of more than 0 ° and 10 ° or less upward from the horizontal direction. Here, if the angle of the airflow direction adjustment vane 85 is larger than 10 °, the outlet angle becomes too steep, and the outlet air is hard to blow from the indoor unit to a distant place, and the conditioned air is hard to circulate indoors. In contrast, according to the present embodiment, the angle adjustment range of the airflow direction adjustment vane 85 is set to be in a range of more than 0 ° and 10 ° or less, and therefore, it is possible to suppress difficulty in circulating conditioned air indoors.

In the present embodiment, the air intake port 60 and the air outlet port 75 are formed in the first back surface plate 56 and the front surface member 81, which are side plates facing each other, of the side plates 34 of the entire casing 33. The air sucked from the air suction port 60 flows toward the air blow-out port 75 opposed thereto, and is blown out from the entire casing 33. In this embodiment, since air flows in one direction in the entire housing 33, the air is less likely to receive resistance in the housing 33 and is likely to flow in the housing 33.

In the present embodiment, the entire casing 33 of the indoor unit 30 includes the first casing 51 in which the indoor heat exchanger 31 and the indoor fan 32 are provided, and the second casing 71 having the outlet passage 73, the air outlet 75, and the first casing 51. According to this embodiment, since the second casing 71 is independent from the first casing 51, the second casing 71 can be attached to an existing indoor unit, or the second casing 71 attached to a different first casing 51 can be shared. In addition, as an indoor unit of an air conditioning system using an air duct connected from an outdoor unit to a plurality of rooms, the second casing 71 may be attached to the air duct.

Further, the indoor unit of the present embodiment is a ceiling-suspended type indoor unit, and can adjust the blow-out direction of the blown-out air upward, and therefore is effective for use in an indoor space where a duct or the like is exposed, the ceiling is high, and the space above the indoor unit 30 is large.

Modification of the first embodiment

(modification 1)

Modification 1 shown in fig. 10 is an example in which the shape of the outlet passage 73 is different from that of the first embodiment of fig. 8. In the outlet passage 73 of modification 1, the bottom surface portion 78 of the outlet passage 73 has a downstream bottom portion 78a on the downstream side in the air flow direction of the outlet passage 73. The downstream bottom portion 78a is a portion in a predetermined range from the downstream-side open end of the bottom portion 78 of the blowing path 73 to the upstream side. In the present embodiment, the downstream bottom portion 78a is a portion ranging from the downstream-side open end of the air outlet passage 73 to the upstream side, and approximately 1/3 of the passage length of the air outlet passage 73. Although this range may be about 1/2 of the passage length of the blowing passage 73, a smaller range makes it easier to make the angular range of the blowing direction of the downward adjustment air larger than the angular range of the upward adjustment.

In the blowing path 73 of modification 1, the second lower end 77 is located above the lowermost end of the downstream bottom 78a in the height direction. Therefore, the blowing path 73 has an inclined surface inclined obliquely upward from the lowermost end of the downstream bottom portion 73 toward the second lower end 77, and this inclined surface constitutes the blowing surface 84 b.

In modification 1, the upper surface portion 79 is formed by combining a flat surface and a curved surface. The bottom surface portion 78 is entirely formed of a curved surface that curves from the air inflow side to the air outflow side.

The height difference between the first lower end 76 and the second lower end 77 is Δ h 1. The lowermost end of the downstream bottom 78a has a height difference Δ h2 from the second lower end 77. As in the first embodiment, an inclined surface inclined in a direction to increase the opening area may be formed at the opening end of the blowout surface 84 b.

The other configurations are the same as those of the first embodiment.

In modification 1, the second lower end 77 is located below the first lower end 76, and the height of the second lower end 77 is higher than the lowermost end of the downstream bottom portion 78a of the bottom surface portion 78 of the outlet passage 73. According to this height relationship, when the air flowing along the bottom surface portion 78 of the blowout path 73 passes through the lowermost end after flowing downward in the blowout path 73, the flow direction is changed to be upward by the blowout surface 84b and blown out. In this case, since the entire bottom surface portion is formed of the curved surface, the flow direction of the air smoothly changes.

According to this configuration, since the upward blowing surface 84b is provided, the blowing direction of the air is easily upward and stable in combination with the airflow direction adjustment vane 85 that can adjust the airflow direction of the air rectified by the blowing passage 73 to be more horizontally upward. Therefore, the conditioned air is easily circulated indoors.

In modification 1, the second lower end 77 may be at the same height as the lowermost end of the downstream bottom 78 a. In this configuration, the blowout surface 84b is a horizontal surface, as in the first embodiment. Even with this configuration, the operation and effect are substantially the same as those of modification 1 of fig. 10.

(modification 2)

Modification 2 shown in fig. 11 is an example in which the shape of the outlet passage 73 is different from that of the first embodiment of fig. 8. In the outlet passage 73 of modification 2, specifically, a wall surface constituting the outlet passage 73 is provided with a projecting portion 80a, and the projecting portion 80a is formed by projecting downward an upper portion of a downstream-side opening portion in the air flow direction of the wall surface. The extension 80a extends downward from the upper surface portion 79. In addition, the protruding portion 80a extends in the horizontal direction. In other words, the extension portion 80a extends in a direction intersecting the air flow direction of the outlet passage 73 and intersecting the vertical direction. The meaning of "horizontal" as used herein is the same as described above.

The other configurations are the same as those of the first embodiment.

In modification 2, when the operation of blowing air downward from the air outlet 75 is performed, the air blown out from the upper portion of the air outlet passage 73 tends to flow downward while being bent along the extension portion 80 a. Therefore, the flow of the air from the air outlet 75 toward the lower side is stabilized. In addition, in modification 2, since the air outlet passage 73 is also provided, the air that has been rectified and has a stable flow direction can be blown downward without being diffused.

In modification 2, the extension 80a is formed integrally with the wall surface constituting the upper surface portion 78, but the extension 80a may be formed of a different member from the wall surface constituting the upper surface portion 78.

(modification 3)

An indoor unit 39 of modification 3 shown in fig. 12 is an example of a casing 33 in which the first casing 51 and the second casing 71 of the above-described embodiment shown in fig. 4 are integrally formed. In modification 3, the outlet passage 73 is also provided in the first unit 50.

This modification 3 is the same as the above-described embodiment shown in fig. 1 to 9, except that the housing 33 is a housing in which the first housing 51 and the second housing 71 are integrated. In particular, of the end portions of the outlet passage 73 extending from the indoor heat exchanger 31 toward the air outlet 75, the second lower end 77, which is the lower end of the end portion on the air outflow side, is located below the first lower end 76, which is the lower end of the end portion on the air inflow side, in the height direction. Further, an airflow direction adjustment vane 85 capable of adjusting the airflow direction of the air flowing out from the outlet passage 73 to be more upward than the horizontal direction is provided in the air outlet 75.

The details of the other configurations are omitted.

In this modification 3 as well, since the outlet passage 73 is provided downstream of the indoor heat exchanger 31 in the air flow direction, the air flowing out of the indoor heat exchanger 31 passes through the outlet passage 73 without being diffused. The air is rectified in the blow-out passage 73 between the first lower end 77 and the second lower end 78. The blowing direction of the air rectified in the blowing passage 73 can be adjusted by the airflow direction adjustment vane 85.

In modification 3, the air is also rectified in the air outlet passage 73, and then the air outlet direction is adjusted by the airflow direction adjustment vanes 85, so that the airflow direction can be easily adjusted even if the airflow direction is directed upward from horizontal. Further, by blowing out the rectified conditioned air upward, the conditioned air easily reaches a further place from the indoor unit 30, and is easily circulated indoors.

(second embodiment)

A second embodiment shown in fig. 13 and 14 will be explained.

In this second embodiment, the entire housing 33 includes one body unit 50, one blow-out unit 70, one attachment unit 100, and a pair of trim covers 91, 92. In other words, the indoor unit 30 according to the first embodiment is further provided with an additional unit 100. The additional unit 100 is a unit for providing an additional function to the indoor unit 30.

The additional unit 100 includes a third housing 101 and a functional part 102 provided inside the third housing 101. The functional component 102 is, for example, a discharge portion that purifies air by a discharge that generates low-temperature plasma containing active species. The additional unit is provided with an electronic component box in which a control board for controlling the operation of the discharge unit 102 is housed, which is not shown. The third casing 101 is provided with a filter (not shown) for adsorbing dust in the intake air.

The outer shape of the third casing 101 is a rectangular parallelepiped shape having a long lateral length, and the third casing 101 is attached to the back surface of the main unit 50. The third casing 101 has the air intake port 103 for taking air into the inside and the air vent 104 through which air flows out from the second casing 101 to the first casing 51. The filter is provided in air intake port 103. In the second embodiment, the air inlet 60 of the main body case 50 in the first embodiment is an air inlet port communicating with the air vent 104.

A ventilation port 106 for introducing air outside the indoor space into the supplementary unit 100 and the main body unit 50 is formed on the left panel 105 of the third casing 101. The air outside the indoor space is air that has not been temperature-adjusted, such as outdoor air or air in the ceiling. An air duct (not shown) for introducing air outside the indoor space into the internal space of the casing 33 is connected to the ventilation port 106, and the inside of the casing 33 is ventilated.

The other configurations, including the blowing path 73 and the airflow direction adjustment blade 85, are the same as those of the first embodiment.

According to the second embodiment, in the configuration in which the additional unit 100 is provided to the indoor unit 30, the conditioned air rectified in the outlet passage 73 can be blown upward, as in the first embodiment. Therefore, as in the first embodiment, conditioned air easily reaches a further place from the indoor unit 30, and the air easily circulates indoors.

Other effects are the same as those of the first embodiment.

(other embodiments)

The above embodiment may have the following configuration.

For example, in the above embodiment, the shape of the entire housing 33 is not limited to the rectangular parallelepiped shape, but may be a hexagonal or octagonal three-dimensional shape in a plan view, in other words, a three-dimensional shape in which a plurality of left and right lateral plates are provided. The front surface and the back surface of the housing 33 do not have to be parallel to each other, and the right side surface and the left side surface do not have to be parallel to each other.

In the first embodiment, the air intake port 60 is formed in the rear panel 56, but the air intake port may be formed in another position such as one of the left and right panels 57, 58, the bottom panel 53, or the like.

In the first embodiment, when the horizontal direction is set to 0 °, the wind direction adjustment blade 85 can adjust the wind direction to an angle range larger than 0 ° and equal to or smaller than 10 ° from the horizontal direction, but the upper limit of the range may be changed. In the above-described embodiment and modification, the airflow direction adjustment vane 85 is configured by the plurality of flat plate-like vane members 86, but may be 1 piece or have a modified shape.

The embodiments and modifications have been described above, but it is understood that various changes and modifications can be made without departing from the spirit and scope of the claims. The above embodiments and modifications may be appropriately combined and replaced as long as the functions of the objects of the present disclosure are not affected.

Industrial applicability-

In summary, the present disclosure is useful for an indoor unit of an air conditioner.

-description of symbols-

10 air conditioner

30 indoor machine

31 indoor heat exchanger (Heat exchanger)

32 indoor fan (Fan)

33 entire case (casing)

34 side plate

35 drainage tray

37 upright part (outer edge)

51 first casing

56 first back panel (side panel)

60 air intake

71 second casing

73 blow-off path

75 air outlet

76 first lower end

77 second lower end

78 bottom surface

78a downstream bottom

79 upper surface part

80a extension

81 front panel (side board)

85 wind direction adjusting blade

86 blade part

Claims (10)

1. A ceiling-suspended type air conditioner indoor unit comprising a casing (33), a heat exchanger (31), a fan (32), and an airflow direction adjustment blade (85), the casing (33) having a plurality of side plates (34), an air outlet (75) being formed in one of the side plates (34), the heat exchanger (31) being disposed in the casing (33), the fan (32) blowing out air that has passed through the heat exchanger (31) from the air outlet (75) to a side of the casing (33), the airflow direction adjustment blade (85) being provided to the air outlet (75), characterized in that:

the ceiling suspension type air conditioner indoor unit includes a blow-out passage (73) extending from the heat exchanger (31) toward the air blow-out opening (75),

when the lower end of the blowout path (73) on the heat exchanger (31) side into which air flows is set as a first lower end (76), and the lower end of the blowout path (73) on the air outlet (75) side out of which air flows out is set as a second lower end (77), the second lower end (77) is positioned lower than the first lower end (76) in the height direction,

the airflow direction adjustment blade (85) can adjust the airflow direction of the air flowing out of the air outlet passage (73) to be more horizontally upward.

2. A ceiling-suspended type air conditioner indoor unit as set forth in claim 1, wherein:

the blow-out passage (73) has a bottom surface portion (78) located at the bottom of the blow-out passage (73),

the bottom surface section (78) has a downstream bottom section (78a) on the downstream side in the air flow direction of the blowout passage (73),

the second lower end (77) is located at the same height as the lowermost end of the downstream bottom (78a) in the height direction, or is located above the downstream bottom (78 a).

3. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

the blow-out passage (73) has a bottom surface section (78) located at the bottom of the blow-out passage (73) and an upper surface section (79) opposed to the bottom surface section (78),

at least a part of the bottom surface portion (78) and/or the upper surface portion (79) is formed of a curved surface that curves from an inflow side toward an outflow side of air.

4. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

a drain pan (35) within the housing (33) receiving drain water produced at the heat exchanger (31),

the blow-out passage (73) is arranged on a downstream side of an outer edge (37) of the drain pan (35) in an air flow direction.

5. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

the upper surface of the wind direction adjustment blade (85) is a plane in a state that the wind direction is adjusted to be more upward than the horizontal direction.

6. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

the airflow direction adjustment blade (85) has a plurality of blade members (86) extending in a direction intersecting the direction of air flow in the air outlet passage (73) and intersecting the vertical direction,

the plurality of blade members (86) are arranged one above the other.

7. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

if the horizontal direction is 0 DEG, the wind direction adjustment blade (85) can adjust the wind direction to an angle range of more than 0 DEG and 10 DEG or less upward from the horizontal direction.

8. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

the wall surface constituting the blowing path (73) has a protruding portion (80a), and the protruding portion (80a) is formed by protruding downward the upper portion of the downstream side opening portion in the air flow direction of the wall surface,

the extension portion (80a) extends in a direction intersecting with the air flow direction of the air outlet passage (73) and intersecting with the vertical direction.

9. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

an air intake port (60) is formed in a side plate (56) of the casing (33) that faces a side plate (81) in which the air outlet port (75) is formed.

10. A ceiling-suspended type air conditioner indoor unit according to claim 1 or 2, characterized in that:

the housing (33) comprises a first housing (51) and a second housing (71),

the first housing (51) is provided with the heat exchanger (31) and the fan (32);

the second casing (71) has the air outlet passage (73) and the air outlet (75), and the second casing (71) is attached to the first casing (51).

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