JP2017227423A - Indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit of a compact air conditioner suitable for a small room such as a study room, a lavatory and a closet.SOLUTION: As in an indoor unit 2, a lower end portion 12aa of a first heat exchange portion 12a and a lower end portion 12ba of a second heat exchange portion 12b are separated from each other while keeping a horizontal distance G, a fan 13 positioned between the first heat exchange portion 12a and the second heat exchange portion 12b can be made close to a lower end side of an indoor heat exchanger 12, and a height position of a fan 13 to the indoor heat exchanger 12 can be lowered in comparison with a case free from the clearance (distance G). As a result, a height dimension L of a casing 22 can be determined to be less than or equal to a dimension of two times of a diameter D of the fan 13, and miniaturization of the indoor unit 2 can be realized.SELECTED DRAWING: Figure 2

Description

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

  In recent years, there is a growing need to air-condition small rooms such as study rooms, washrooms, and closets, and there is a demand for small air conditioners that can be installed in such small rooms and do not protrude from the walls and ceiling. As a small air conditioner, for example, a ceiling-embedded air conditioner disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 9-145143) is known.

  In the indoor unit of the air conditioner, the fan is disposed between the two heat exchangers, so that the height is reduced.

  However, since the air conditioner is premised on being able to accommodate a large room such as a living room, the size has not been adapted to a small room such as a study, a washroom, or a closet.

  The subject of this invention is providing the indoor unit of the small air conditioner suitable for small rooms, such as a study, a washroom, and a closet.

  An indoor unit of an air conditioner according to a first aspect of the present invention is an indoor unit of an air conditioner that is embedded in or installed on a ceiling, and includes a casing, a crossflow fan, and a heat exchanger. I have. The cross flow fan and the heat exchanger are accommodated in the casing. The heat exchanger includes a first heat exchange unit and a second heat exchange unit having a plurality of heat transfer tubes. The first heat exchange part and the second heat exchange part are inclined in opposite directions so as to open upward in the height direction of the casing in the used state with the outer peripheral surface of the cross flow fan interposed therebetween, and the first heat It arrange | positions in the state which maintained the clearance gap so that the lower end parts of an exchange part and a 2nd heat exchange part may be separated from the crossflow fan side. A seal member that closes the gap is disposed in the gap. The height of the casing is set to be not more than twice the diameter of the cross flow fan.

  In this indoor unit, the end portions of the first heat exchange unit and the second heat exchange unit that are close to each other are separated from each other with a gap in the horizontal direction, so the first heat exchange unit and the second heat exchange unit The cross flow fan located between the heat exchangers can be brought closer to the adjacent end portions of the heat exchangers, and the height position of the cross flow fan relative to the heat exchanger can be made lower than when there is no gap. As a result, it is possible to set the height of the casing to a dimension that is twice or less the diameter of the cross flow fan, and the downsizing of the indoor unit is realized.

  The indoor unit of the air conditioner according to the second aspect of the present invention is the indoor unit of the air conditioner according to the first aspect, and the heat transfer tubes are arranged in three or more rows in the air flow direction.

  In this indoor unit, since three or more rows of heat transfer tubes are arranged, even if the heat exchanger is downsized due to downsizing of the indoor unit, the capacity does not decrease.

  The indoor unit of the air conditioner according to the third aspect of the present invention is the indoor unit of the air conditioner according to the first aspect or the second aspect, and the diameter of the heat transfer tube is in the range of 4 mm to 5 mm.

  In this indoor unit, by setting the tube diameter of the heat transfer tube within a range of 4 mm to 5 mm, it is possible to cope with downsizing of the heat exchanger due to downsizing of the indoor unit.

  An indoor unit of an air conditioner according to a fourth aspect of the present invention is an indoor unit of an air conditioner according to any one of the first to third aspects, and includes a first heat exchange unit and a second heat exchange. The portion further includes a tube plate that supports both ends of the heat transfer tube. The seal member is fixed to the tube sheet.

  In this indoor unit, since the tube plate that supports the heat transfer tube is generally selected from a metal material that is more rigid and sturdy than the heat transfer tube, it is suitable for supporting the seal member.

  An indoor unit of an air conditioner according to a fifth aspect of the present invention is the indoor unit of an air conditioner according to any one of the first to fourth aspects, and the seal member is made of metal.

  In this indoor unit, since the sealing member itself is strong, the rigidity of the entire heat exchanger after the sealing member is attached to the tube plate is increased, and handling during assembly is facilitated.

  An indoor unit of an air conditioner according to a sixth aspect of the present invention is the indoor unit of an air conditioner according to any one of the first to fifth aspects, wherein the horizontal distance of the gap is that of the heat exchanger. It is set within a range of 5 to 20% of the maximum horizontal dimension.

  In this indoor unit, if the gap is widened too much, the horizontal dimension of the heat exchanger is enlarged, and if the gap is too narrow, the position of the cross flow fan relative to the heat exchanger has to be increased. In view of the balance between the two, it is desirable that the horizontal distance of the gap is set within a range of 5 to 20% of the maximum horizontal dimension of the heat exchanger.

  In the indoor unit of the air conditioner according to the first aspect of the present invention, the lower ends of the first heat exchange unit and the second heat exchange unit are separated from each other while maintaining a gap in the horizontal direction. The cross flow fan located between the heat exchanger and the second heat exchange part can be brought closer to the adjacent end side of each heat exchange part, and the height position of the cross flow fan with respect to the heat exchanger can be made higher than when there is no gap. Can be lowered. As a result, it is possible to set the height of the casing to a size that is twice or less the diameter of the cross flow fan. Therefore, downsizing of the indoor unit is realized.

  In the indoor unit of an air conditioner according to the second aspect of the present invention, since three or more rows of heat transfer tubes are arranged, the capacity does not decrease even if the heat exchanger is downsized due to downsizing of the indoor unit.

  In the indoor unit of the air conditioner according to the third aspect of the present invention, the tube diameter of the heat transfer tube is set within a range of 4 mm to 5 mm, thereby corresponding to the downsizing of the heat exchanger due to the downsizing of the indoor unit. be able to.

  In the indoor unit of an air conditioner according to the fourth aspect of the present invention, the tube plate that supports the heat transfer tube is generally selected from a metal material that is more rigid and sturdy than the heat transfer tube. Suitable for

  In the indoor unit of the air conditioner according to the fifth aspect of the present invention, the seal member itself is strong, so that the rigidity of the entire heat exchanger after the seal member is attached to the tube plate is increased, and handling during assembly is possible. It becomes easy.

  In the indoor unit of an air conditioner according to the sixth aspect of the present invention, if the gap is widened too much, the horizontal dimension of the heat exchanger is enlarged, and if the gap is too narrow, the position of the crossflow fan relative to the heat exchanger is increased. I have to make it. In view of the balance between the two, it is desirable that the horizontal distance of the gap is set within a range of 5 to 20% of the maximum horizontal dimension of the heat exchanger.

The schematic block diagram of the air conditioner using the indoor unit which concerns on one Embodiment of this invention. Sectional drawing of an indoor unit. The perspective view of the said indoor unit which removed the makeup | decoration panel from the indoor unit and visualized the inside. The perspective view of an indoor heat exchanger. The perspective view of a sealing member and a tube sheet. The perspective view before fixation of the sealing member and tube sheet in a modification. The perspective view after the sealing member and tube sheet in a modification are fixed. The internal top view of the said indoor unit when the inside of the indoor unit which concerns on one Embodiment of this invention is seen from the ceiling side.

  Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration of Air Conditioner 1 FIG. 1 is a schematic configuration diagram of an air conditioner 1 using an indoor unit 2 according to an embodiment of the present invention. The air conditioner 1 performs indoor heating and cooling by vapor compression refrigeration cycle operation. The air conditioner 1 mainly includes an outdoor unit 3 as a heat source unit and an indoor unit 2 as a utilization unit connected in parallel thereto. The refrigerant circuit 10 is configured by connecting the outdoor unit 3, the indoor unit 2, and a refrigerant communication pipe.

(1-1) Outdoor unit 3
The outdoor unit 3 is installed outdoors, and includes a compressor 31, a four-way switching valve 32, an outdoor heat exchanger 33, and an expansion valve 34. The compressor 31 is an inverter compressor whose capacity can be changed by rotation speed control.

  The four-way switching valve 32 is a valve that switches the direction of refrigerant flow. During the cooling operation, the discharge side of the compressor 31 and the gas side of the outdoor heat exchanger 33 are connected, and the gas side of the indoor heat exchanger 12 and the suction side of the compressor 31 are connected (four-way switching in FIG. 1). (See solid line for valve 32). Further, during the heating operation, the discharge side of the compressor 31 and the gas side of the indoor heat exchanger 12 are connected, and the suction side of the compressor 31 and the gas side of the outdoor heat exchanger 33 are connected (four in FIG. 1). (Refer to the broken line of the path switching valve 32).

  The outdoor heat exchanger 33 is a cross fin type fin-and-tube heat exchanger composed of heat transfer tubes and a large number of fins. The outdoor heat exchanger 33 serves as a refrigerant condenser during the cooling operation and serves as a refrigerant evaporator during the heating operation. It becomes.

  The expansion valve 34 is an electric expansion valve, and is connected between the outdoor heat exchanger 33 and the indoor heat exchanger 12 in order to adjust the pressure, flow rate, and the like of the refrigerant flowing in the refrigerant circuit 10.

(1-2) Indoor unit 2
FIG. 2 is a cross-sectional view of the indoor unit 2. FIG. 3 is a perspective view of the indoor unit 2 in which the decorative panel 21 is removed from the indoor unit 2 to visualize the inside. 2 and 3, the interior of the indoor unit 2 is configured by a decorative panel 21 and a casing 22. The indoor unit 2 is installed in the ceiling of the room or suspended.

  When the indoor unit 2 is embedded in the ceiling, the casing 22 is actually embedded in the ceiling surface, and the decorative panel 21 is exposed on the ceiling surface. The decorative panel 21 forms the outline of the suction inlet 20a and the blower outlet 20b. During operation, the air outlet 20b opens, the fan 13 rotates, air is sucked in from the air inlet 20a, and is blown out from the air outlet 20b.

  The indoor heat exchanger 12 is a cross fin type fin-and-tube heat exchanger composed of heat transfer tubes and a large number of fins, and serves as a refrigerant evaporator during cooling operation to cool indoor air. During the heating operation, it becomes a refrigerant condenser and heats indoor air.

(2) Operation of the air conditioner 1 (2-1) Cooling operation During the cooling operation, the four-way switching valve 32 is in the state indicated by the solid line in FIG. 1, and the discharge side of the compressor 31 is the gas of the outdoor heat exchanger 33. And the suction side of the compressor 31 is in communication with the gas side of the indoor heat exchanger 12.

  In this state, when the compressor 31 is started, the high-temperature and high-pressure gas refrigerant discharged from the compressor 31 is introduced into the outdoor heat exchanger 33. The gas refrigerant exchanges heat with outdoor air in the outdoor heat exchanger 33 and condenses to become a high-temperature and high-pressure liquid refrigerant toward the expansion valve 34. The high-temperature and high-pressure liquid refrigerant is decompressed by the expansion valve 34 to become a low-temperature and low-pressure gas-liquid two-phase refrigerant and enters the indoor heat exchanger 12. This gas-liquid two-phase refrigerant exchanges heat with indoor air in the indoor heat exchanger 12 to become a gas refrigerant, and is sucked into the compressor 31 again.

  During the cooling operation, the air outlet 20b opens, the fan 13 rotates, and the indoor air sucked from the air inlet 20a is cooled when passing through the indoor heat exchanger 12, and is blown out from the air outlet 20b.

(2-2) Heating operation During the heating operation, the four-way switching valve 32 is in the state indicated by the broken line in FIG. 1, the discharge side of the compressor 31 is connected to the gas side of the indoor heat exchanger 12, and the compressor 31 The suction side is connected to the gas side of the outdoor heat exchanger 33. The opening of the expansion valve 34 is adjusted in order to reduce the refrigerant going to the outdoor heat exchanger 33 to an evaporation pressure at which the refrigerant can be evaporated in the outdoor heat exchanger 33.

  In this state, when the compressor 31 is started, the high-temperature and high-pressure gas refrigerant discharged from the compressor 31 is introduced into the indoor heat exchanger 12. The gas refrigerant is condensed by exchanging heat with indoor air in the indoor heat exchanger 12 to become a high-temperature and high-pressure liquid refrigerant. The liquid refrigerant exiting the indoor heat exchanger 12 is decompressed by the expansion valve 34 to become a low-temperature / low-pressure gas-liquid two-phase refrigerant and enters the outdoor heat exchanger 33. The gas-liquid two-phase refrigerant exchanges heat with outdoor air in the outdoor heat exchanger 33 to become a gas refrigerant, and is sucked into the compressor 31 again.

  During the heating operation, the air outlet 20b is opened, the fan 13 rotates, and the indoor air sucked from the air inlet 20a is heated when passing through the indoor heat exchanger 12, and is blown out from the air outlet 20b.

(3) Detailed Configuration of Indoor Unit 2 As shown in FIG. 2, the casing 22 accommodates the filter 9, the indoor heat exchanger 12, the fan 13, and the drain pan 14. Details of each part will be described below.

(3-1) Filter 9
The filter 9 is disposed on the upstream side of the air flow of the indoor heat exchanger 12, and removes dust from the air taken in from the room. Thus, the filter 9 prevents dust floating in the air from contaminating the surface of the indoor heat exchanger 12.

(3-2) Indoor heat exchanger 12
FIG. 4 is a perspective view of the indoor heat exchanger 12. In FIG. 4, the indoor heat exchanger 12 includes a plurality of heat transfer tubes 121, a plurality of fins 122, and a tube plate 123. The plurality of fins 122 are stacked in parallel at a predetermined interval. The plurality of heat transfer tubes 121 penetrates the plurality of stacked fins 122 in the thickness direction. The tube plate 123 is disposed so as to sandwich the plurality of laminated fins 122 from both sides, and supports both end portions of the heat transfer tube 121.

  The heat transfer tubes 121 are copper tubes having a tube outer diameter of 4 mm, and are arranged in three rows along the air flow direction. While reducing the size of the indoor heat exchanger 12 by setting the tube diameter to 4 mm, the shortage of capacity, which is an adverse effect of the size reduction, is eliminated by the three-row arrangement of the heat transfer tubes 121.

  Moreover, as shown in FIG. 2, the indoor heat exchanger 12 is comprised by two heat exchange parts which adjoin a horizontal direction with a different inclination attitude | position, and the heat exchange part on the left side of FIG. The part 12a and the right heat exchanging part are referred to as a second heat exchanging part 12b.

  In FIG. 2, the first heat exchange unit 12a and the second heat exchange unit 12b are opposed to each other with the outer periphery of the fan 13 interposed therebetween, so that the distance between the upper ends of both is larger than the distance between the lower ends of both. Inclined in the opposite direction.

  The gap between the lower ends of the first heat exchange part 12a and the second heat exchange part 12b is such that the air that should pass through the first heat exchange part 12a and the second heat exchange part 12b is the first heat exchange part 12a and the second heat exchange part. This causes a so-called bypass phenomenon that passes through the gap without passing through the replacement portion 12b. Therefore, in the present embodiment, the gap is closed by the seal member 17.

  Hereinafter, the 1st heat exchange part 12a, the 2nd heat exchange part 12b, and the sealing member 17 are demonstrated.

(3-2-1) First heat exchange unit 12a
In FIG. 2, the upper end portion 12ab of the first heat exchanging portion 12a is located at the inner upper portion of the casing 22, and the inclination angle of the upper surface 12ad and the lower surface 12ac connecting the upper end portion and the lower end portion 12aa is 35 ° with respect to the horizontal line. It is set within a range of ˜45 °. In the present embodiment, the upper surface 12ad and the lower surface 12ac of the first heat exchange unit 12a are inclined by 40 ° with respect to the horizontal plane.

  The condensed water generated in the first heat exchange unit 12a descends along the surface of the first heat exchange unit 12a. Most of the condensed water that falls reaches the lower surface 12ac, but does not leave the lower surface 12ac due to surface tension. Since the lower surface 12ac is inclined, the condensed water that has reached the lower surface 12ac descends along the lower surface 12ac and reaches the lower end 12aa. Condensed water that has reached the lower end portion 12aa may fall to the drain pan 14 as it is at the time of descent. If the condensed water that has reached the lower end portion 12aa and cannot fall first is combined with the condensed water and increased in gravity, the drain pan Some fall to 14.

(3-2-2) Second heat exchange unit 12b
In FIG. 2, the upper end portion 12bb of the second heat exchanging portion 12b is disposed close to the inside of the tongue portion 15 of the first heat exchanging portion 12a, and an upper surface 12bd connecting the upper end portion 12bb and the lower end portion 12ba, and The inclination angle of the lower surface 12bc is set within a range of 35 ° to 45 ° with respect to the horizontal line. In the present embodiment, the upper surface 12bd and the lower surface 12bc of the second heat exchange unit 12b are inclined by 40 ° with respect to the horizontal plane.

  The dimension of the 2nd heat exchange part 12b is shorter than the 1st heat exchange part 12a, and the height position of the upper end part 12bb is lower than the upper end part 12ab of the 1st heat exchange part 12a. On the other hand, the height position of the lower end portion 12ba is substantially the same height position as the lower end portion 12aa of the first heat exchange unit 12a.

  The lower end 12ba of the second heat exchange unit 12b and the lower end 12aa of the first heat exchange unit 12a are separated from each other while maintaining a horizontal distance G.

  If the distance G is excessively widened, the horizontal dimension of the indoor heat exchanger is enlarged, and if the distance G is too narrow, the position of the fan 13 relative to the indoor heat exchanger 12 must be increased. In consideration of the balance between the two, the distance G is desirably set within a range of 5 to 20% of the maximum horizontal dimension B of the indoor heat exchanger 12 (see FIG. 2).

(3-2-3) Seal member 17
As shown in FIG. 2, the seal member 17 is a sheet metal member that blocks a gap (distance G) between the lower end 12ba of the second heat exchange unit 12b and the lower end 12aa of the first heat exchange unit 12a. The seal member 17 is fixed to the tube plate 123.

  FIG. 5 is a perspective view of the seal member 17 and the tube plate 123. In FIG. 5, the seal member 17 includes a central piece 173 located at a central portion in the width direction orthogonal to the longitudinal direction, a first piece 171 extending from the both ends of the central piece 173 at a predetermined inclination angle with respect to the central piece 173, and Second piece 172. The free ends of the first piece 171 and the second piece 172 extend away from each other.

  A hole 123a for inserting the seal member 17 is formed in the tube plate 123 in advance. The shape of the hole 123 a substantially matches the cross-sectional shape of the seal member 17.

  The seal member 17 is fixed by press-fitting into the hole 123a. Of course, the fixing of the seal member 17 and the tube plate 123 is not limited to press-fitting. For example, after the seal member 17 is inserted into the hole 123a, one of the insertion locations of either the seal member 17 or the tube plate 123 is fixed. The part may be deformed and fixed.

  As shown in FIG. 2, the seal member 17 in use is in a convex posture. The air that has detoured to bypass the first heat exchange unit 12a or the second heat exchange unit 12b collides with the central piece 173, and along the first piece 171 adjacent to the central piece 173, the first heat exchange unit 12a side. Or returned to the second heat exchange section 12b side along the second piece 172 adjacent to the central piece 173.

  Further, the condensed water dripped onto the seal member 17 from the first heat exchange part 12a and the second heat exchange part 12b flows along the inclination of the first piece 171 or the second piece 172, and in the drain pan 14 located below. Fall into.

(3-3) Fan 13
The fan 13 is a cross-flow fan, has a width dimension longer than the diameter, and sucks air from the direction perpendicular to the rotation axis. Therefore, the fan 13 sucks air from the single suction port 20a and blows it out to the single air outlet 20b. be able to. The air that has entered from the suction port 20 a passes through the filter 9, the suction air flow path 41 a (see FIG. 2), and the indoor heat exchanger 12 and is sucked into the fan 13.

(3-4) Drain pan 14
The drain pan 14 is disposed below the lower end 12aa of the first heat exchange unit 12a and the lower end 12ba of the second heat exchange unit 12b. Condensed water generated on the surfaces of the first heat exchange unit 12a and the second heat exchange unit 12b descends to the lower end 12aa and the lower end 12ba and falls into the drain pan 14.

(3-5) Cosmetic panel 21
The decorative panel 21 closes the opening of the casing 22, as shown in FIG. Since the drain pan 14 is located at the center of the casing 22 and projects vertically downward from the opening surface of the casing 22, the center of the decorative panel 21 is curved downward so as to avoid the projecting portion of the drain pan 14.

  The suction port 20a is provided at two locations across the center, one being the first suction port 20aa corresponding to the first heat exchange unit 12a and the other being the second suction port 20ab corresponding to the second heat exchange unit 12b. It is.

  A panel 24 is attached to the suction port 20a. The panel 24 has a plurality of ventilation holes 24a through which air passes. The 1st wind direction adjustment blade | wing 52 is attached to the blower outlet 20b. The first wind direction adjusting blade 52 can be adjusted in inclination angle by a motor. When the operation is stopped, the first wind direction adjusting blade 52 closes the outlet 20b. During operation, the air outlet 20b opens, the fan 13 rotates, air is sucked in from the air inlet 20a, and is blown out from the air outlet 20b.

  The suction port 20a and the air outlet 20b are adjacent to each other with a certain distance, and are attached to the air outlet 20b so that a phenomenon that air blown from the air outlet 20b is sucked into the air inlet 20a, that is, a so-called short circuit does not occur. The blowing direction is appropriately adjusted by the first wind direction adjusting blade 52 thus formed.

(3-6) Casing 22
The casing 22 is a box-shaped frame as shown in FIG. In addition, as shown in FIG. 2, a heat insulating material 41 is attached to the inside of the casing 22, and the fan 13, the indoor heat exchanger 12, and the drain pan 14 are arranged from above in a space surrounded by the heat insulating material 41. Arranged in order. An intake air flow path 41a and a blown air flow path 41b are formed in the space. The air blown out from the fan 13 passes through the blown air passage 41b and goes out from the blower outlet 20b.

  In the casing 22, both the outer peripheral surface of the fan 13 are close to the upper surface 12ad of the first heat exchange unit 12a and the upper surface 12bd of the second heat exchange unit 12b within a range of 10 mm to 15 mm as a shortest distance. The positional relationship is adjusted. Therefore, the height dimension L of the casing 22 can be 2D or less with respect to the diameter D of the fan 13, and the size reduction is achieved.

(4) Features (4-1)
In the indoor unit 2, the lower end 12aa of the first heat exchange unit 12a and the lower end 12ba of the second heat exchange unit 12b are separated from each other while maintaining a distance G in the horizontal direction. 2 The fan 13 positioned between the heat exchanger 12b can be brought closer to the lower end side of the indoor heat exchanger 12, and the height position of the fan 13 with respect to the indoor heat exchanger 12 can be set higher than when there is no gap (distance G). Can also be lowered. As a result, the height dimension L of the casing 22 can be set to be equal to or smaller than twice the diameter D of the fan 13, and the downsizing of the indoor unit 2 is realized.

(4-2)
In the indoor unit 2, since the heat transfer tubes 121 are arranged in three rows, even if the indoor heat exchanger 12 is downsized due to downsizing of the indoor unit 2, the capacity does not decrease.

(4-3)
In the indoor unit 2, by setting the tube diameter of the heat transfer tube 121 within a range of 4 mm to 5 mm, it is possible to cope with the downsizing of the indoor heat exchanger 12 due to the downsizing of the indoor unit 2.

(4-4)
As the tube plate 123 that supports the heat transfer tube 121, a metal material that is stronger and more rigid than the heat transfer tube 121 is selected, which is suitable for supporting the seal member 17.

  Further, since the seal member 17 itself is strong, the rigidity of the entire indoor heat exchanger 12 after the seal member 17 is attached to the tube plate 123 is increased, and handling during assembly is facilitated.

(4-5)
In the indoor unit 2, when the distance G between the lower end 12aa of the first heat exchange unit 12a and the lower end 12ba of the second heat exchange unit 12b is excessively widened, the horizontal dimension of the indoor heat exchanger 12 is increased. If the distance G is too narrow, the position of the fan 13 with respect to the indoor heat exchanger 12 must be increased. Considering the balance between the two, the distance G is set within a range of 5 to 20% of the maximum horizontal dimension B of the indoor heat exchanger 12 (see FIG. 2).

(5) Modification In the above embodiment, the seal member 17 is fixed by press-fitting into the hole 123a, or after the seal member 17 is inserted into the hole 123a, either the seal member 17 or the tube plate 123 is used. One part of the insertion portion is deformed and fixed, but here, another fixing method will be described.

  FIG. 6A is a perspective view of the modified example before the sealing member 17 and the tube plate 123 are fixed. FIG. 6B is a perspective view after the sealing member 17 and the tube plate 123 are fixed in the modified example.

  6A and 6B, the tube plate 123 is formed with a notch 123b into which the seal member 17 is inserted, and a first claw 123c and a second claw 123d for holding the seal member 17 after insertion. .

  As shown in FIG. 6A, the first claw 123c and the second claw 123d maintain a state of protruding in a predetermined direction before the seal member 17 is inserted. When the seal member 17 is inserted into the notch 123b, the first claw 123c is bent so as to press down the first piece 171 of the seal member 17, and the second claw 123d pushes the second piece 172 of the seal member 17. It is bent to hold down.

  This method has good workability because the seal member 17 can be fixed to the tube plate 123 after the indoor heat exchanger 12 excluding the seal member 17 is assembled.

(6) Others The indoor unit 2 of the present embodiment has a height of the casing 22 due to the proximity of the indoor heat exchanger 12 and the fan 13, the downsizing of the indoor heat exchanger 12 by reducing the diameter of the heat transfer tube 121, and the like. The size of the unit is reduced, and the indoor unit 2 is made compact.

  Here, other configurations implemented in accordance with the downsizing of the indoor unit 2 will also be described. FIG. 7 is an internal plan view of the indoor unit 2 when the inside of the indoor unit according to the embodiment of the present invention is viewed from the ceiling side.

  In FIG. 7, the drain pump 141 has a lower position in the vertical direction than the fan motor 133 of the fan 13, but is arranged so as to partially overlap in a plan view to save space.

  In addition, the bearing 135 that supports the fan rotor 131 of the fan 13 from the side opposite to the fan motor 133 is fitted into the recessed portion 131a in which the end plate of the fan rotor 131 is recessed, so that the dimension of the fan 13 in the rotation axis direction is set. It is shortened.

  As described above, the present invention is useful for a small indoor unit using a cross flow fan.

1 Air Conditioner 2 Indoor Unit 12 Indoor Heat Exchanger 12a First Heat Exchanger 12b Second Heat Exchanger 121 Heat Transfer Tube 123 Tube Plate 13 Fan (Cross Flow Fan)
17 Seal member 22 Casing

JP-A-9-145143

Claims (6)

An indoor unit of an air conditioner that is embedded in the ceiling or installed on the ceiling,
A casing (22);
A cross flow fan (13) housed in the casing (22);
A heat exchanger (12) including a first heat exchange section (12a) and a second heat exchange section (12b) housed in the casing (22) and having a plurality of heat transfer tubes (121);
With
The first heat exchanging part (12a) and the second heat exchanging part (12b) are located above the casing (22) in the height direction in the use state with the outer peripheral surface of the cross flow fan (13) interposed therebetween. The first heat exchange part (12a) and the second heat exchange part (12b) are separated from each other when viewed from the cross flow fan (13) side. It is arranged with the gap (G) kept as
In the gap (G), a seal member (17) that closes the gap (G) is disposed,
The height of the casing (22) is set to be not more than twice the diameter of the cross flow fan (13).
Indoor unit of air conditioner. The heat transfer tubes (121) are arranged in three or more rows in the air flow direction.
The indoor unit of the air conditioner according to claim 1. The tube diameter of the heat transfer tube (121) is in the range of 4 mm to 5 mm.
The indoor unit of the air conditioner according to claim 1 or 2. The first heat exchange unit (12a) and the second heat exchange unit (12b) further include a tube plate (123) that supports both ends of the heat transfer tube (121),
The seal member (17) is fixed to the tube plate (123).
The indoor unit of the air conditioner according to any one of claims 1 to 3. The sealing member (17) is made of metal.
The indoor unit of the air conditioner according to any one of claims 1 to 4. The horizontal distance of the gap (G) is set within a range of 5 to 20% of the maximum horizontal dimension of the heat exchanger (12).
The indoor unit of the air conditioner according to any one of claims 1 to 5.

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