Ventilation structure and indoor unit of air conditioner

Abstract

To provide an air blowing structure that can suitably reduce noise, and an indoor machine of an air conditioner.SOLUTION: An air blowing structure 21 comprises a cross flow fan 22, and a housing 30 provided with the cross flow fan 22. The housing 30 comprises a case part 31 comprising a suction port 39 from which air is sucked, and a first member 41. The first member 41 comprises: a tongue part 44 for separating a suction region SR in which air is sucked into the cross flow fan 22, and a discharge region BR in which air is discharged from the cross flow fan 22; and a discharge part 43 located closer to the side of a discharge port 40 than the tongue part 44. The tongue part 44 is made of a non-porous material. A portion of the discharge part 43 is made of a porous material 51. The porous material 51 is provided between an upper surface 43a of the discharge part 43 and a lower surface 43b.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a blower structure and an indoor unit of an air conditioner. [Background technology]

[0002] Known technology relating to crossflow fans is that described in Patent Document 1. In Patent Document 1, the entire fan casing is made of a porous material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-114000 Summary of the Invention [Problem to be solved by the invention]

[0004] There is room for improvement in noise suppression in the ventilation structure having a crossflow fan. An object of the present disclosure is to provide a ventilation structure and an indoor unit of an air conditioner that can suitably suppress noise. [Means for solving the problem]

[0005] A first aspect of the air blowing structure that solves the above-mentioned problem comprises a crossflow fan and a housing in which the crossflow fan is mounted, the housing having a case portion having an intake port through which air is drawn in, and a first member, the first member having a tongue portion that separates an intake area through which air is drawn into the crossflow fan from an exhaust area through which air is blown out from the crossflow fan, and a blowing portion located on the exhaust port side of the tongue portion, the tongue portion being made of a non-porous material and a portion of the blowing portion being made of a porous material, the porous material being provided from the top surface to the bottom surface of the blowing portion.

[0006] According to this configuration, noise is reduced by the porous material provided in the first member, and therefore the air blowing structure can effectively suppress noise.

[0007] The air blowing structure of a second aspect is the air blowing structure of the first aspect, in which a heat exchanger is arranged above the first member, and a drain pan surface that receives condensation water from the heat exchanger is formed on the upper surface of the blowing portion, and the porous material is provided from a portion of the drain pan surface that does not face the heat exchanger to a lower surface of the blowing portion.

[0008] According to this configuration, an air layer can be provided between the drain pan surface and the lower surface of the first member, so that the air blowing structure can further suppress noise.

[0009] According to a third aspect of the present invention, in the air blowing structure of the first or second aspect, the porous material is provided in a portion of the blowing portion other than a portion having the lowest vertical height.

[0010] According to this configuration, the portion of the drain pan surface where moisture is likely to accumulate is not porous, so that moisture accumulated on the drain pan surface is less likely to leak downward.

[0011] The air blowing structure of a fourth aspect is the air blowing structure of any one of the first to third aspects, wherein the porous material is arranged downstream of the air flow caused by the cross-flow fan relative to the tongue portion of the blowing section, and the end portion downstream of the air flow caused by the cross-flow fan of the part of the blowing section made of the porous material is closer to the tongue portion than the blowing outlet through which the sucked air is blown out.

[0012] According to this configuration, the porous material suppresses pressure fluctuations near the tongue where turbulence is likely to occur, thereby reducing noise.

[0013] A fifth aspect of the air blowing structure is the air blowing structure of the fourth aspect, wherein the blowing area is formed by a first wall surface on the first member side and a second wall surface opposite the first wall surface with respect to the blowing area, the tongue portion has an inner end located on the blowing area side, and the first wall surface has a first dimension from the blowing outlet to the inner end, a second dimension from the blowing outlet to a position that is 60% of the first dimension, and a third dimension from the blowing outlet to an end of the portion of the blowing section made of the porous material on the blowing outlet side, and the third dimension is longer than the second dimension.

[0014] According to this configuration, since the porous material can be provided near the tongue portion of the blowing portion where turbulence is likely to occur, the air blowing structure can effectively suppress noise.

[0015] According to a sixth aspect of the present invention, in the air blowing structure of the fifth aspect, the porous material has a structure that allows air to pass through, and faces both the blowing area and the suction area.

[0016] According to this configuration, the space on the suction area side and the space on the blowing area side are connected via the porous material, so that air flows out through the porous material to the suction area side, where the pressure is lower than that of the blowing area side, thereby enhancing the effect of suppressing pressure fluctuations and reducing noise.

[0017] The air blowing structure of a seventh aspect is the air blowing structure of the sixth aspect, wherein the portion of the blowing section made of the porous material has a first end face facing the blowing area, the first end face having a first width, and the first width having a dimension that is 10% or more of the first dimension.

[0018] With this configuration, the air blowing structure can suppress noise caused by turbulence and maintain its strength.

[0019] The air blowing structure of an eighth aspect is the air blowing structure of the seventh aspect, wherein the portion of the blowing section made of the porous material has a second end face facing the suction area, the second end face having a second width, and the second width being shorter than the first width.

[0020] According to this configuration, since the second width is shorter than the first width, it is possible to increase the contact area between the portion of the blowing part made of the porous material and the tongue part.

[0021] According to a ninth aspect of the present invention, in the air blowing structure of the eighth aspect, the second width has a dimension that is 50% or more of the first width.

[0022] According to this configuration, by ensuring a space on the first end face side and a space on the second end face side, pressure fluctuations due to turbulence developed near the tongue of the blowing area can be suppressed. Therefore, the air blowing structure can effectively suppress noise.

[0023] According to a tenth aspect of the present invention, an indoor unit for an air conditioner that solves the above-mentioned problems comprises the air blowing structure according to any one of the first aspect to the ninth aspect, and a heat exchanger.

[0024] According to this configuration, the porous material provided in the first member suppresses pressure fluctuations near the tongue where turbulence is likely to occur, thereby reducing noise. Therefore, the indoor unit of the air conditioner can effectively suppress noise.

[0025] The air blowing structure of an eleventh aspect that solves the above-mentioned problems comprises a crossflow fan and a housing in which the crossflow fan is mounted, the housing having an intake port through which air is drawn, an outlet port through which the drawn air is blown out, a tongue portion that separates an intake area where air is drawn into the crossflow fan from the intake port and an outlet area through which air is blown out from the crossflow fan, and a porous material, the porous material being positioned downstream of the tongue portion in the flow of air caused by the crossflow fan, and the downstream end of the porous material in the flow of air caused by the crossflow fan is closer to the tongue than the outlet port.

[0026] According to this configuration, the porous material suppresses pressure fluctuations near the tongue where turbulence is likely to occur, thereby reducing noise. Therefore, the air blowing structure can effectively suppress noise.

[0027] The air blowing structure of a twelfth aspect is the air blowing structure of the first aspect, wherein the blowing area is formed by a first wall surface on the tongue side and a second wall surface opposite the first wall surface with respect to the blowing area, the tongue has an inner end located on the blowing area side, and the first wall surface has a first dimension from the blowing outlet to the inner end, a second dimension from the blowing outlet to a position that is 60% of the first dimension, and a third dimension from the blowing outlet to an end of the porous material on the blowing outlet side, and the third dimension is longer than the second dimension.

[0028] According to this configuration, since the porous material can be provided near the tongue portion where turbulence is likely to occur, noise can be suppressed in an optimal manner.

[0029] According to a thirteenth aspect of the present invention, in the air blowing structure of the second aspect, the porous material has a structure that allows air to pass through, and faces both the blowing area and the suction area.

[0030] According to this configuration, the space on the suction area side and the space on the blowing area side are connected via the porous material, so that air flows out through the porous material to the suction area side, where the pressure is lower than that of the blowing area side, thereby enhancing the effect of suppressing pressure fluctuations and reducing noise.

[0031] The air blowing structure of a fourteenth aspect is the air blowing structure of the third aspect, wherein the porous material has a first end surface facing the blowing area, the first end surface having a first width, and the first width having a dimension that is 10% or more of the first dimension.

[0032] According to this configuration, noise caused by turbulence can be suppressed and strength can be maintained.

[0033] The air blowing structure of a fifteenth aspect is the air blowing structure of the fourth aspect, wherein the porous material has a second end surface facing the suction area, the second end surface having a second width, and the second width is shorter than the first width. According to this configuration, since the second width is shorter than the first width, it is possible to increase the contact area between the porous material and the tongue portion.

[0034] According to a sixteenth aspect of the present invention, in the air blowing structure of the fifth aspect, the second width has a dimension that is 50% or more of the first width.

[0035] According to this configuration, by ensuring a space on the first end face side and a space on the second end face side, pressure fluctuations due to turbulence developed near the tongue of the blowing area can be suppressed. Therefore, the air blowing structure can effectively suppress noise.

[0036] The indoor unit of an air conditioner of a seventeenth aspect which solves the above-mentioned problems comprises the air blowing structure of any one of the eleventh aspect to the sixteenth aspect, and a heat exchanger which exchanges heat with the air sucked in through the air inlet.

[0037] According to this configuration, the porous material suppresses pressure fluctuations near the tongue where turbulence is likely to occur, thereby reducing noise. Therefore, the indoor unit of the air conditioner can effectively suppress noise. [Brief description of the drawings]

[0038] [Figure 1] FIG. 2 is a perspective view of an indoor unit of the air conditioner according to the embodiment. [Diagram 2] 2 is a cross-sectional view showing a cross section of the indoor unit of FIG. 1 as viewed from the longitudinal direction. [Diagram 3] FIG. 3 is an enlarged view of a portion of the cross-sectional view of FIG. 2. [Figure 4] This is an example of a graph showing the loudness of the blowing noise versus air volume when a porous material is provided in the blowing section, a porous material is further provided in the tongue section, and no porous material is provided in the tongue section. [Diagram 5] 11 is an example of a graph showing the magnitude of blowing noise relative to the air volume when a porous material is provided in the blowing portion and when a porous material is not provided in the blowing portion. [Figure 6] FIG. 11 is an enlarged view of a porous material according to a first modified example. [Figure 7] FIG. 11 is an enlarged view of a porous material according to a second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] <Embodiment> A ventilation structure 21 and an indoor unit 11 of an air conditioner according to the present embodiment will be described with reference to Figs. 1 to 5.

[0040] <Air conditioner indoor unit and ventilation structure> The indoor unit 11 of the air conditioner shown in Figures 1 to 3 is configured to cool or heat the space inside a room. The indoor unit 11 is a wall-mounted type that is attached to a wall WL inside the room. The indoor unit 11 is connected to the outdoor unit of the air conditioner by a refrigerant piping.

[0041] The indoor unit 11 includes a blower structure 21 and a heat exchanger 12. The blower structure 21 includes a cross-flow fan 22 and a housing 30 in which the cross-flow fan 22 is provided.

[0042] The housing 30 is formed in a box shape extending in the longitudinal direction X of the indoor unit 11. The housing 30 has a case portion 31. The case portion 31 has a top surface portion 32, a first front surface portion 33, a second front surface portion 34, a rear surface portion 35, a bottom surface portion 36, a first side surface portion 37, and a second side surface portion 38. The top surface portion 32, the first front surface portion 33, the second front surface portion 34, the rear surface portion 35, and the bottom surface portion 36 extend in the longitudinal direction X.

[0043] The first side surface portion 37 is connected to one end of the top surface portion 32, the first front surface portion 33, the second front surface portion 34, the rear surface portion 35, and the bottom surface portion 36 in the longitudinal direction X. The second side surface portion 38 is connected to the other end of the top surface portion 32, the first front surface portion 33, the second front surface portion 34, the rear surface portion 35, and the bottom surface portion 36 in the longitudinal direction X.

[0044] The case 31 has an internal space IS formed by a top surface 32, a first front surface 33, a second front surface 34, a rear surface 35, a bottom surface 36, a first side surface 37, and a second side surface 38. The indoor unit 11 is installed on the wall WL, for example, by attaching the rear surface 35 with screws or the like to a mounting plate provided on the wall WL.

[0045] The case portion 31 has an intake port 39 through which air is drawn. The intake port 39 is provided in the top surface portion 32. The intake port 39 extends in the longitudinal direction X along the top surface portion 32. The case portion 31 has an exhaust port 40 through which the drawn air is blown out. The exhaust port 40 is provided between the second front surface portion 34 and the bottom surface portion 36. The exhaust port 40 extends in the longitudinal direction X along the second front surface portion 34 and the bottom surface portion 36.

[0046] The heat exchanger 12 exchanges heat with the air sucked in through the air inlet 39. The heat exchanger 12 has a plurality of fins and a plurality of heat transfer tubes penetrating the plurality of fins. The heat exchanger 12 exchanges heat between the refrigerant flowing through the heat transfer tubes and the air passing through the heat exchanger 12. The heat exchanger 12 functions as an evaporator or a condenser depending on the operating state of the indoor unit 11. The heat exchanger 12 is disposed in the internal space IS of the case portion 31 such that at least a portion of the heat exchanger 12 is located closer to the air inlet 39 than the crossflow fan 22.

[0047] The indoor unit 11 further includes an air filter 13. The air filter 13 is provided in an internal space IS of the case portion 31. The air filter 13 is detachably attached to the case portion 31. An air filter support portion 31a that supports the air filter 13 includes a first air filter support portion 31b near the rear surface portion 35 side and a second air filter support portion 31c on the second front surface portion 34 side. The second air filter support portion 31c contacts the first member 41. The air filter 13 is supported by the first air filter support portion 31b and the second air filter support portion 31c.

[0048] Air filter 13 collects dust in the indoor air sucked in from suction port 39. When air filter 13 is attached to case part 31, it is located between top surface part 32 of case part 31 and heat exchanger 12. Air filter 13 prevents dust in the indoor air from adhering to the surface of heat exchanger 12.

[0049] The cross flow fan 22 is a generally cylindrical impeller extending in the longitudinal direction X. The cross flow fan 22 is provided in the internal space IS of the case portion 31. The cross flow fan 22 has a blade edge 23 provided on the outer periphery of the cross flow fan 22.

[0050] When the cross-flow fan 22 rotates, indoor air is drawn into the internal space IS of the case portion 31 through the air inlet 39. The drawn air passes through the air filter 13 and then the heat exchanger 12. The air that has undergone heat exchange by the heat exchanger 12 is blown out by the cross-flow fan 22 from the air outlet 40 into the room.

[0051] The housing 30 has a first member 41. The first member 41 extends from the second front surface portion 34 toward the cross flow fan 22. The first member 41 extends along the cross flow fan 22 in the longitudinal direction X. A tongue portion 44 of the first member 41 faces the cross flow fan 22 in the radial direction of the cross flow fan 22. A gap is provided between the tongue portion 44 of the first member 41 and the outer periphery of the cross flow fan 22. The heat exchanger 12 is disposed above the first member 41. The first member 41 is formed of, for example, a porous resin material and a non-porous resin material.

[0052] The housing 30 has a second member 42. The second member 42 is provided diagonally below and rearward of the cross flow fan 22. The second member 42 guides air blown out from the cross flow fan 22 to the air outlet 40. The second member 42 is, for example, a part of the housing 30. The second member 42 may be a separate member from the housing 30. The length of the second member 42 in the longitudinal direction X is substantially equal to the length of the air outlet 40 in the longitudinal direction X.

[0053] The indoor unit 11 further includes a flap 14. The flap 14 is provided at a lower edge of the second member 42 so as to be rotatable relative to the second member 42. The flap 14 is formed in a flat plate shape extending in the longitudinal direction X. The length of the flap 14 in the longitudinal direction X is substantially equal to the length of the air outlet 40 in the longitudinal direction X. The flap 14 rotates relative to the second member 42, for example, by a flap drive motor.

[0054] The area where air is drawn into the crossflow fan 22 from the suction port 39 is defined as the suction area SR. The suction area SR is, for example, the area between the heat exchanger 12 and the crossflow fan 22. The area where air is blown out from the crossflow fan 22 is defined as the blowing area BR. The blowing area BR is, for example, the area between the second member 42 and the crossflow fan 22. The blowing area BR is, for example, the area between the flap 14 and the crossflow fan 22. The blowing area BR is, for example, the area between the flap 14 and the first member 41.

[0055] The first member 41 has a tongue portion 44 and a blowing portion 43. The blowing portion 43 is located closer to the air outlet 40 than the tongue portion 44. A part of the blowing portion 43 is made of a porous material 51. The part of the first member 41 other than the tongue portion 44 constitutes the blowing portion 43. The blowing portion 43 and the tongue portion 44 are integrally formed. The tongue portion 44 and the porous material 51 will be described in detail later.

[0056] A drain pan surface 41a that receives condensation water from the heat exchanger 12 is formed on the upper surface 43a of the blowing portion 43. The drain pan surface 41a is formed by a surface of the upper surface 43a of the blowing portion 43 that is closer to the cross flow fan 22 than the second air filter support portion 31c and a third surface 44e of the tongue portion 44. In the longitudinal direction X, the length of the drain pan surface 41a is substantially equal to the length of the heat exchanger 12.

[0057] The tongue portion 44 divides the space around the cross flow fan 22 into a suction region SR and a blowing region BR. The tongue portion 44 extends in the longitudinal direction X along the cross flow fan 22. The tongue portion 44 faces the cross flow fan 22 in the radial direction of the cross flow fan 22. A gap is provided between the tongue portion 44 and the outer periphery of the cross flow fan 22.

[0058] The tongue portion 44 is a portion where the air flow along the blade edge 23 of the cross flow fan 22 branches into a flow toward the suction region SR through a gap between the cross flow fan 22 and the tongue portion 44, and a flow toward the air outlet 40. The tongue portion 44 has a tongue surface portion 44x arranged on the surface of the tongue portion 44. The tongue surface portion 44x includes an inner end 44a facing the flap 14. The tongue surface portion 44x includes an outer end 44b adjacent to the porous material 51. The tongue surface portion 44x includes a first surface 44c, a second surface 44d, and a third surface 44e. The tongue portion 44 is formed of a non-porous material. The non-porous material is a material having a higher density than the porous material 51.

[0059] The first surface 44c curves to protrude from the inner end 44a toward the blowing area BR adjacent to the crossflow fan 22. The second surface 44d is connected to the first surface 44c. The second surface 44d curves to fit the outer peripheral shape of the crossflow fan 22. The second surface 44d faces the crossflow fan 22 with a gap therebetween. The third surface 44e is connected to the second surface 44d. The third surface 44e is provided between an upper end of the second surface 44d and the outer end 44b. The third surface 44e is a flat surface.

[0060] The blowing region BR is formed by a first wall surface 45 on the first member 41 side and a second wall surface 46 on the opposite side of the blowing region BR to the first wall surface 45. The first wall surface 45 is formed on the lower surface of the first member 41. The second wall surface 46 is formed by the second member 42 and the flap 14. The first wall surface 45 and the second wall surface 46 are arranged so that the cross-sectional area of ​​the blowing region BR widens toward the end. The blowing region BR has a function of a diffuser because the cross-sectional area increases toward the air outlet 40.

[0061] <Porous material> The porous material 51 has a structure that allows air to pass through. The material of the porous material 51 is not particularly limited. The material of the porous material 51 is, for example, a resin, a ceramic, a metal, or the like. For example, the resin is a foamed resin. For example, the ceramic or the metal is a porous sintered body. The metal may be a net-like body also called a mesh.

[0062] The porous material 51 is disposed downstream of the tongue portion 44 of the blowing portion 43 in the flow of air caused by the cross flow fan 22. The porous material 51 is provided from the upper surface 43a to the lower surface 43b of the blowing portion 43. In one example, the porous material 51 is provided from a portion of the drain pan surface 41a that does not face the heat exchanger 12 to the lower surface 43b of the blowing portion 43.

[0063] The porous material 51 is disposed in a portion of the blowing portion 43 adjacent to the tongue portion 44. The porous material 51 is provided in a portion of the blowing portion 43 other than a portion having the lowest height in the vertical direction. The porous material 51 is provided in the blowing portion 43 by insert molding, an adhesive, ultrasonic welding, screw fastening, or the like. The porous material 51 may be provided discontinuously or continuously in the blowing portion 43 in the longitudinal direction X.

[0064] The portion of the blowing section 43 made of the porous material 51 has a first end 52 on the blowing outlet 40 side. The first end 52 is an end on the downstream side of the air flow caused by the cross flow fan 22. The first end 52 is closer to the tongue portion 44 than to the blowing outlet 40.

[0065] The portion of the blowing part 43 made of the porous material 51 has a second end 53 on the tongue 44 side. The second end 53 is an end on the upstream side of the air flow caused by the cross flow fan 22. The second end 53 comes into contact with the tongue 44.

[0066] The portion of the blowing section 43 made of the porous material 51 faces both the blowing region BR and the suction region SR. The portion of the blowing section 43 made of the porous material 51 has a first end surface 54 facing the blowing region BR. The portion of the blowing section 43 made of the porous material 51 has a second end surface 55 facing the suction region SR.

[0067] The dimension of the first end face 54 is a first width L1. The first width L1 is the distance between the downstream end and upstream end of the air flow caused by the cross flow fan 22 of the porous material 51 on the first wall surface 45. The dimension of the second end face 55 is a second width L2. The second width L2 is the distance between the downstream end and upstream end of the air flow caused by the cross flow fan 22 on the portion of the second end face 55 facing the suction area SR.

[0068] 4 shows an example of a graph comparing the loudness of the blowing noise relative to the air volume in the case of pattern 1 with the loudness of the blowing noise relative to the air volume in the case of pattern 2. Pattern 1 is a case in which porous material 51 is provided in blowing portion 43, and porous material 51 is further provided in tongue portion 44. Pattern 2 is a case in which porous material 51 is provided in blowing portion 43, and porous material 51 is not provided in tongue portion 44. The solid line in FIG. 4 is a graph of the loudness of the blowing noise relative to the air volume in pattern 1. The dashed line in FIG. 4 is a graph of the loudness of the blowing noise relative to the air volume in pattern 2.

[0069] The magnitude of the airflow noise relative to the air volume in pattern 1 is greater than the magnitude of the airflow noise relative to the air volume in pattern 2. That is, in the case of pattern 2, the airflow noise can be reduced more than in the case of pattern 1.

[0070] <Relationship between the dimensions of the first wall and the porous material> The first wall surface 45 has a first dimension S1 from the air outlet 40 to the inner end 44a. Specifically, the first dimension S1 is the length of the first wall surface 45 from the air outlet 40 to the inner end 44a. 45a The first wall surface 45 has a second dimension S2 from the air outlet 40 to a position that is 60% of the first dimension S1.2 Dimension S 2 is an end portion of the first wall surface 45 on the downstream side of the air flow caused by the cross-flow fan 22 45a and a position that is 60% of the first dimension S1. The first wall surface 45 has a third dimension S3 from the air outlet 40 to the end of the porous material 51 on the air outlet 40 side. 3 Dimension S 3 is an end portion of the first wall surface 45 on the downstream side of the air flow caused by the cross-flow fan 22 45a and the distance between the end of the porous material 51 on the first wall surface 45 downstream of the air flow caused by the cross flow fan 22.

[0071] The second width L2 is shorter than the first width L1. The second width L2 may be longer than the first width L1 or may be equal to the first width L1. The second width L2 has a dimension that is 30% or more of the first width L1. Preferably, the second width L2 has a dimension that is 50% or more of the first width L1. Preferably, the second width L2 has a dimension that is 80% or more of the first width L1.

[0072] The third dimension S3 is longer than the second dimension S2. The third dimension S3 is 70% or more of the first dimension S1. Preferably, the third dimension S3 is 80% or more of the first dimension S1. The first width L1 is 10% or more of the first dimension S1.

[0073] 5 shows an example of a graph comparing the loudness of the blowing noise relative to the air volume in the case of pattern 3 with the loudness of the blowing noise relative to the air volume in the case of pattern 4. Pattern 3 is a case where porous material 51 is provided in blowing section 43. Pattern 4 is a case where porous material 51 is not provided in blowing section 43. In one example, the position in blowing section 43 where porous material 51 is provided satisfies formulas (1) to (3). (Formula 1):S3 / S1=0.85 (Formula 2): L1 / S1=0.13 (Formula 3): L2 / L1=0.83

[0074] The solid line in Fig. 5 is a graph of the volume of the air blowing noise relative to the air volume for pattern 3. The dashed line in Fig. 5 is a graph of the volume of the air blowing noise relative to the air volume for pattern 4. The volume of the air blowing noise relative to the air volume for pattern 3 is smaller than the volume of the air blowing noise relative to the air volume for pattern 4. That is, the air blowing noise can be reduced more in pattern 3 than in pattern 4.

[0075] The effects of this embodiment will be described. (1) The air blowing structure 21 includes a crossflow fan 22 and a housing 30 in which the crossflow fan 22 is provided. The housing 30 includes a case portion 31 having an inlet 39 through which air is drawn, and a first member 41. The first member 41 includes a tongue portion 44 that separates an inlet region SR where air is drawn into the crossflow fan 22 from a blowing region BR where air is blown out from the crossflow fan 22, and a blowing portion 43 located on the blowing port 40 side of the tongue portion 44. The tongue portion 44 is made of a non-porous material. A portion of the blowing portion 43 is made of a porous material 51. The porous material 51 is provided from an upper surface 43a to a lower surface 43b of the blowing portion 43.

[0076] According to this configuration, noise is reduced by the porous material 51 provided in the first member 41. Therefore, the air blowing structure 21 can suitably suppress noise. In this embodiment, the porous material 51 is provided on the cross flow fan 22 side of the first member 41 rather than near the air outlet 40 where the user's hand is likely to touch, so that the first member 41 is less likely to be damaged and the appearance and shape of the indoor unit 11 can be maintained.

[0077] (2) A heat exchanger 12 is disposed above the first member 41, and a drain pan surface 41a that receives condensation water from the heat exchanger 12 is formed on the upper surface 43a of the blow-out section 43, and porous material 51 is provided from the portion of the drain pan surface 41a that does not face the heat exchanger 12 to the lower surface 43b of the blow-out section 43.

[0078] According to this configuration, an air layer can be provided between the drain pan surface 41a and the lower surface 43b of the blowing portion 43, so that the air blowing structure 21 can further suppress noise.

[0079] (3) The porous material 51 is provided in a portion of the blowing portion 43 other than the portion having the lowest vertical height. With this configuration, the portion of the drain pan surface 41a where moisture is likely to accumulate is not porous, so that the moisture accumulated on the drain pan surface 41a is less likely to leak downward in the air blowing structure 21.

[0080] (4) Porous material 51 is disposed downstream of tongue portion 44 of blowing section 43 in the air flow caused by cross flow fan 22. The end portion of the portion of blowing section 43 made of porous material 51 downstream of the air flow caused by cross flow fan 22 is closer to tongue portion 44 than air outlet 40 through which the sucked air is blown out. With this configuration, porous material 51 suppresses pressure fluctuations near tongue portion 44, where turbulence is likely to occur, thereby reducing noise.

[0081] (5) The blowing region BR is formed by a first wall surface 45 on the first member 41 side and a second wall surface 46 on the opposite side of the blowing region BR to the first wall surface 45, the tongue portion 44 has an inner end 44a located on the blowing region BR side, and the first wall surface 45 has a first dimension S1 from the blowing port 40 to the inner end 44a, a second dimension S2 from the blowing port 40 to a position that is 60% of the first dimension S1, and a third dimension S3 from the blowing port 40 to an end of the portion of the blowing section 43 made of the porous material 51 on the blowing port 40 side, the third dimension S3 being longer than the second dimension S2. With this configuration, the porous material 51 can be provided near the tongue portion 44 where turbulence is likely to occur, so that the air blowing structure 21 can suitably suppress noise.

[0082] (6) The porous material 51 has a structure that allows air to pass through, and faces both the blowing area BR and the suction area SR. Near the tongue 44, the air flows through the gap between the crossflow fan 22 and the tongue 44, and the flow toward the suction area SR and the flow toward the blowing port 40 merge. For this reason, turbulence is likely to occur and grow due to the collision of the air flow with the tongue 44, the mixing of the flows, and friction on the wall surface. According to the above configuration, the space on the suction area SR side and the space on the blowing area BR side are connected via the porous material 51, so that a small amount of air flows out through the porous material 51 to the suction area SR side, which has a lower pressure than the blowing area BR side. This increases the effect of suppressing pressure fluctuations and reducing noise.

[0083] (7) The portion of the blowing section 43 made of the porous material 51 has a first end surface 54 facing the blowing area BR. The first end surface 54 has a first width L1. The first width L1 has a dimension that is 10% or more of the first dimension S1. With this configuration, the air blowing structure 21 can suppress noise caused by turbulence and maintain its strength.

[0084] (8) The portion of blowing unit 43 made of porous material 51 has a second end surface 55 facing suction region SR. Second end surface 55 has a second width L2. Second width L2 is shorter than first width L1. With this configuration, since second width L2 is shorter than first width L1, the contact area between the portion of blowing unit 43 made of porous material 51 and tongue portion 44 can be increased.

[0085] According to the above configuration, the following effects can be obtained depending on the method by which the porous material 51 is provided in the blowing portion 43. When the porous material 51 is attached by insert molding or adhesive to the portion of the blowing portion 43 adjacent to the tongue portion 44, the area of ​​the joint between the portion of the blowing portion 43 made of the porous material 51 and the tongue portion 44 can be increased, and the strength of the joint can be increased. When the porous material 51 is attached to the portion of the blowing portion 43 adjacent to the tongue portion 44 by ultrasonic welding, screw fastening, or the like, a place for embedding a welded portion or a screw hole can be secured on the second end portion 53 side of the portion of the blowing portion 43 made of the porous material 51.

[0086] (9) The second width L2 has a dimension that is 50% or more of the first width L1. With this configuration, by ensuring a space on the first end face 54 side and a space on the second end face 55 side, it is possible to suppress pressure fluctuations due to turbulence developed near the tongue portion 44 of the blowing area BR. Therefore, the air blowing structure 21 can effectively suppress noise.

[0087] (10) The indoor unit 11 of the air conditioner includes the air blowing structure 21 and the heat exchanger 12. According to this configuration, the porous material 51 provided in the first member 41 suppresses pressure fluctuations near the tongue where turbulence is likely to occur, thereby reducing noise. Therefore, the indoor unit 11 of the air conditioner can suitably suppress noise.

[0088] <Example of change> In addition to the above-described embodiment, the air blowing structure 21 and the air conditioner indoor unit 11 of the present disclosure may be configured in the following modified examples or in a combination of at least two modified examples that are not mutually contradictory.

[0089] As shown in FIG. 6, the porous material 51 may be disposed on the first member 41 so as to be located between the outer end 44b of the tongue surface portion 44x and the inner end 44a of the tongue surface portion 44x in the extending direction of the first wall surface 45. When the porous material 51 is disposed on the first member 41 so as to be located between the outer end 44b and the inner end 44a in the extending direction of the first wall surface 45, the following effects can be obtained depending on the method by which the porous material 51 is provided on the first member 41. When the porous material 51 is attached to the first member 41 by insert molding or adhesive, the area of ​​the joint between the porous material 51 and the tongue portion 44 can be increased, and the strength of the joint can be increased. When the porous material 51 is attached by ultrasonic welding or screwing, a place for embedding a welded portion or a screw hole can be secured on the second end portion 53 side.

[0090] 7, the portion of the blowing portion 43 made of the porous material 51 may be formed in a tapered shape so that the first end face 54 is wider than the second end face 55. Depending on the method by which the porous material 51 is provided on the first member 41, the following effects can be obtained. When the porous material 51 is attached to the first member 41 by insert molding or adhesive, the area of ​​the joint between the porous material 51 and the tongue portion 44 can be increased, thereby increasing the strength of the joint. When the porous material 51 is attached by ultrasonic welding or screw fastening, a place for embedding a welded portion or a screw hole can be secured on the second end portion 53 side.

[0091] Although the embodiments of the air blowing structure 21 and the indoor unit 11 of the air conditioner have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the air blowing structure 21 and the indoor unit 11 of the air conditioner described in the claims. [Explanation of symbols]

[0092] 11...indoor unit, 12...heat exchanger, 21...blower structure, 22...crossflow fan, 30...housing, 31...case portion, 39...intake port, 40...blowout port, 41...first member, 41a...drain pan surface, 43...blowout portion, 43a...upper surface, 43b...lower surface, 44...tongue portion, 44a...inner end, 45...first wall surface, 46...second wall surface, 51...porous material, 54...first end surface, 55...second end surface, BR...blowout area, L1...first width, L2...second width, S1...first dimension, S2...second dimension, S3...third dimension, SR...suction area.

Claims

1. A blowing structure (21), A crossflow fan (22); a housing (30) in which the cross-flow fan (22) is provided; The housing (30) comprises: A case portion (31) having an intake port (39) through which air is sucked in; A first member (41), The first member (41) is a tongue portion (44) that divides an intake region (SR) into which air is drawn into the cross flow fan (22) and a blowing region (BR) into which air is blown out from the cross flow fan (22); A blowing portion (43) located closer to the blowing port (40) than the tongue portion (44), The tongue (44) is made of a non-porous material; A part of the blowing portion (43) is made of a porous material (51), The porous material (51) is provided from an upper surface (43a) to a lower surface (43b) of the blowing portion (43), the porous material (51) is provided in a portion of the blowing section (43) other than a portion having a lowest vertical height, and is not provided in the portion having the lowest vertical height, Ventilation structure.

2. A heat exchanger (12) is disposed above the first member (41), A drain pan surface (41a) for receiving condensation water from the heat exchanger (12) is formed on an upper surface (43a) of the blowing portion (43), The porous material (51) is provided from a portion of the drain pan surface (41a) that does not face the heat exchanger (12) to a lower surface (43b) of the blowing portion (43). The air blowing structure according to claim 1 .

3. A ventilation structure (21), A crossflow fan (22); a housing (30) in which the cross-flow fan (22) is provided; The housing (30) comprises: A case portion (31) having an intake port (39) through which air is sucked in; A first member (41), The first member (41) is a tongue portion (44) that divides an intake region (SR) into which air is drawn into the cross flow fan (22) and a blowing region (BR) into which air is blown out from the cross flow fan (22); A blowing portion (43) located closer to the blowing port (40) than the tongue portion (44), The tongue (44) is made of a non-porous material; A part of the blowing portion (43) is made of a porous material (51), The porous material (51) is provided from an upper surface (43a) to a lower surface (43b) of the blowing portion (43), A heat exchanger (12) is disposed above the first member (41), A drain pan surface (41a) for receiving condensation water from the heat exchanger (12) is formed on an upper surface (43a) of the blowing portion (43), The porous material (51) is provided from a portion of the drain pan surface (41a) that does not face the heat exchanger (12) to a lower surface (43b) of the blowing portion (43). Ventilation structure.

4. The porous material (51) is provided in a portion of the blowing section (43) other than a portion having the lowest vertical height. The air blowing structure according to claim 3.

5. the porous material (51) is disposed downstream of the tongue portion (44) of the blowing portion (43) in a direction of an air flow caused by the cross-flow fan (22); a downstream end of the air flow generated by the cross-flow fan (22) in the portion of the blowing section (43) made of the porous material (51) is closer to the tongue portion (44) than the blowing port (40) from which the sucked air is blown out; The air blowing structure according to claim 1 .

6. The blowing area (BR) is formed by a first wall surface (45) on the first member (41) side and a second wall surface (46) on the opposite side of the blowing area (BR) from the first wall surface (45), The tongue portion (44) has an inner end (44a) located on the blowing region (BR) side, the first wall surface (45) has a first dimension (S1) from the air outlet (40) to the inner end (44a), a second dimension (S2) from the air outlet (40) to a position that is 60% of the first dimension (S1), and a third dimension (S3) from the air outlet (40) to an end of a portion of the air outlet section (43) made of the porous material (51) on the air outlet (40) side, The third dimension (S3) is greater than the second dimension (S2); The air blowing structure according to claim 5.

7. A ventilation structure (21), A crossflow fan (22); a housing (30) in which the cross-flow fan (22) is provided; The housing (30) comprises: A case portion (31) having an intake port (39) through which air is sucked in; A first member (41), The first member (41) is a tongue portion (44) that divides an intake region (SR) into which air is drawn into the cross flow fan (22) and a blowing region (BR) into which air is blown out from the cross flow fan (22); A blowing portion (43) located closer to the blowing port (40) than the tongue portion (44), The tongue (44) is made of a non-porous material; A part of the blowing portion (43) is made of a porous material (51), the porous material (51) is provided across an upper surface (43a) to a lower surface (43b) of the blowing portion (43), and is disposed downstream of the tongue portion (44) of the blowing portion (43) in a flow of air by the cross-flow fan (22); a downstream end of the air flow generated by the cross-flow fan (22) in the portion of the blowing section (43) made of the porous material (51) is located closer to the tongue portion (44) than the blowing port (40) from which the sucked air is blown out; The blowing area (BR) is formed by a first wall surface (45) on the first member (41) side and a second wall surface (46) on the opposite side of the blowing area (BR) from the first wall surface (45), The tongue portion (44) has an inner end (44a) located on the blowing region (BR) side, the first wall surface (45) has a first dimension (S1) from the air outlet (40) to the inner end (44a), a second dimension (S2) from the air outlet (40) to a position that is 60% of the first dimension (S1), and a third dimension (S3) from the air outlet (40) to an end of a portion of the air outlet section (43) made of the porous material (51) on the air outlet (40) side, The third dimension (S3) is greater than the second dimension (S2); Ventilation structure.

8. The porous material (51) has a structure that allows air to pass through, and faces both the blowing area (BR) and the suction area (SR). The air blowing structure according to claim 6 or 7.

9. The portion of the blowing section (43) made of the porous material (51) has a first end surface (54) facing the blowing region (BR), The first end surface (54) has a first width (L1), The first width (L1) has a dimension of 10% or more of the first dimension (S1); The air blowing structure according to claim 8.

10. The portion of the blowing section (43) made of the porous material (51) has a second end surface (55) facing the suction region (SR), The second end surface (55) has a second width (L2), The second width (L2) is shorter than the first width (L1); The air blowing structure according to claim 9.

11. The second width (L2) has a dimension of 50% or more of the first width (L1). The air blowing structure according to claim 10.

12. An indoor unit (11) of an air conditioner, A blower structure (21) according to any one of claims 1 to 7; A heat exchanger (12), Indoor unit.

Images