WO2004044497A1

WO2004044497A1 - Heat exchanger and air conditioner indoor unit

Info

Publication number: WO2004044497A1
Application number: PCT/JP2003/014274
Authority: WO
Inventors: Yuichi Terada
Original assignee: Daikin Industries, Ltd.
Priority date: 2002-11-14
Filing date: 2003-11-10
Publication date: 2004-05-27
Also published as: AU2003277652A1; AU2003277652B2; KR100605923B1; US20050205238A1; EP1562002A4; EP1562002A1; KR20040097304A

Abstract

A heat exchanger and an air conditioner indoor unit, where heat-exchanging ability is prevented from falling and the tolerance for installation angle of a heat-exchanging portion can be relaxed. An indoor heat exchanger (50) is constructed from plural heat exchangers that are joined together and provided in an air conditioner indoor unit (2). The heat exchangers are a first indoor heat exchanger (50a), a second indoor heat exchanger (50b), a third indoor heat exchanger (50c), and a fourth indoor heat exchanger (50d). The third indoor heat exchanger (50c) is joined at an angle to one end of the first indoor heat exchanger (50a) and second indoor heat exchanger (50b). The fourth indoor heat exchanger (50d) is joined at an angle to the other end of the first indoor heat exchanger (50a) and second indoor heat exchanger (50b). The third indoor heat exchanger (50c) and fourth indoor heat exchanger (50d) have substantially the same length.

Description

Description Indoor units for heat exchangers and air conditioners (technical field)

TECHNICAL FIELD The present invention relates to a heat exchanger, and particularly to a heat exchanger and an indoor unit of an air conditioner arranged in an indoor unit of an air conditioner.

(Background technology)

A heat exchanger formed by combining a plurality of heat exchange parts at an angle has been used conventionally. Such a heat exchanger can be formed into various shapes according to design requirements and the like, depending on how the heat exchangers are combined. In addition, the plurality of heat exchange units forming the heat exchanger often have various lengths (see Japanese Patent Application Laid-Open No. 2001-41662). For example, some heat exchangers provided in indoor units of air conditioners are formed in an inverted V shape so as to surround a blower fan. In this heat exchanger, heat exchangers of various lengths are combined to form an inverted V-shape.The heat exchanger that covers the front of the blower fan and the heat exchanger that covers the upper rear of the blower fan It has a different length than the part.

When a heat exchanger formed by a plurality of heat exchangers combined at an angle as described above is assembled, an error in the mounting angle of the heat exchanger may be a problem. That is, if there is an error in the mounting angle of the heat exchanger, an error occurs in the thickness of the end of the heat exchanger, which may cause a problem in the arrangement of the heat exchanger. Therefore, it is desirable that the error of the mounting angle of the heat exchange part is as small as possible, but if too strict tolerance is required, the assemblability of the heat exchanger is reduced.

—On the other hand, the position error at the end of the heat exchanger increases as the length of the heat exchange section increases, even if the error in the mounting angle of the heat exchange section is the same. Therefore, it is conceivable to reduce the tolerance of the mounting angle by shortening the length of the heat exchange section.

However, reducing the length of the heat exchange section affects the heat exchange capacity of the heat exchanger. That is, if the length of the heat exchange section is reduced, the surface area of each heat exchange section will be The measured total surface area of the heat exchanger is small, and the heat exchange capacity of the heat exchanger is low.

U. As described above, simply reducing the length of the heat exchange unit in order to reduce the tolerance of the mounting angle of the heat exchange unit would cause a decrease in heat exchange capacity. (Disclosure of the Invention)

An object of the present invention is to provide a heat exchanger and an indoor unit of an air conditioner that can suppress a decrease in heat exchange capacity and reduce an allowable error in a mounting angle of a heat exchange unit.

The heat exchanger according to claim 1, wherein the heat exchanger is configured by joining a plurality of heat exchange units, and is disposed in an indoor unit of the air conditioner. A heat exchange section and a third heat exchange section are provided. The second heat exchange unit is connected to one end of the first heat exchange unit at an angle. The third heat exchange unit is joined to the other end of the first heat exchange unit at an angle. The second heat exchange section and the third heat exchange section have substantially the same length.

In this heat exchanger, the second heat exchange section and the third heat exchange section have the same length. When the total length of the heat exchanger is the same, the length of the end of the heat exchanger due to the mounting angle error is greater when the lengths of the second and third heat exchangers are the same than when the lengths are different. The maximum value of the position error becomes smaller. That is, when the second heat exchange section and the third heat exchange section have different lengths, one becomes longer and the other becomes shorter. In this case, the position error of the end of the heat exchanger due to the longer heat exchanging part becomes large. On the other hand, if the total length of the heat exchanger is the same, the length of the heat exchange section when the length of the second heat exchange section and the length of the third heat exchange section are the same is longer than the length when the length is different. Is shorter than the length of the heat exchange section. For this reason, in this heat exchanger, it is possible to suppress a decrease in the heat exchange capacity and to alleviate the tolerance of the mounting angle of the heat exchange section.

The heat exchanger according to claim 2 is the heat exchanger according to claim 1, wherein the first heat exchange section has a substantially inverted V-shaped cross section. Then, the second heat exchange section and the third heat exchange section extend downward from lower ends before and after the first heat exchange section, respectively.

If the lower ends of the second and third heat exchangers are the lower ends of the heat exchanger, respectively, the error in the mounting angle between the second and third heat exchangers is due to the lower end of the heat exchanger. Affects the position error. However, in this heat exchanger, since the lengths of the second heat exchange part and the third heat exchange part are substantially the same, the maximum value of the position error at the lower end of the heat exchanger due to the error in the mounting angle is small. Become. For this reason, in this heat exchanger, the tolerance of the mounting angle between the second heat exchange unit and the third heat exchange unit can be reduced.

The heat exchanger according to claim 3 is the heat exchanger according to claim 1 or 2, wherein the heat exchanger has a symmetrical shape in front and rear, and the second heat exchange unit and the third heat exchange unit , It is symmetrical around.

In this heat exchanger, since the second heat exchange part and the third heat exchange part are symmetrical back and forth, the lengths of the second heat exchange part and the third heat exchange part are substantially the same. ing. For this reason, the tolerance of the mounting angle between the second heat exchange unit and the third heat exchange unit can be reduced. An indoor unit of an air conditioner according to a fourth aspect includes the heat exchanger according to any one of the first to third aspects, and a blower fan arranged to be covered by the heat exchanger.

In this indoor unit of the air conditioner, the blower fan is arranged so as to be covered by the heat exchanger. Therefore, in order to keep the distance between the heat exchanger and the blower fan at a predetermined value, the accuracy of the distance between the heat exchanger and the blower fan is important. Therefore, it is desirable that the shape of the heat exchanger has high accuracy. Therefore, the present invention, which can reduce the tolerance of the mounting angle between the second heat exchange unit and the third heat exchange unit, is particularly effective.

An indoor unit of an air conditioner according to claim 5 includes a blower fan, a heat exchanger, a first drain pan, a second drain pan, and a drain path. The heat exchanger according to claim 1, wherein the heat exchanger covers a front, an upper side, and a rear side of the blower fan, and a front lower end and a rear lower end are equal to or lower than a height of a top part of the blower fan. Be placed. The first drain pan is located below the lower front end of the heat exchanger. The second drain pan is located below the lower rear end of the heat exchanger. The drain route passes drain water discharged from the first drain pan and the second drain pan. Then, the first drain pan and the second drain pan are arranged at substantially the same height.

Generally, in an indoor unit of an air conditioner equipped with a heat exchanger, since the heat exchanger functions as an evaporator during cooling, etc., moisture in the air condenses on the surface of the heat exchanger to generate drain water. I do. For this reason, indoor units of air conditioners usually have drain pans that receive drain water. This drain pan drains water below the heat exchanger. Is usually located below the heat exchanger to receive heat. Therefore, when the heat exchanger is arranged so as to cover the front and rear of the blower fan, the drain pans are arranged below the front lower end and below the rear lower end of the heat exchanger, respectively. In this case, the drain pan on the front side and the drain pan on the rear side are often arranged at different heights (see Japanese Patent Application Laid-Open No. 2000-74409). For example, they are arranged so that the front drain pan is low and the rear drain pan is high, or the front drain pan is high and the rear drain pan is low.

Drain water dropped into the drain pan is discharged from the drain pan outlet through the drain path to the outside of the machine. In this case, the greater the height difference between the position of the drain pan and the position of the drain path, the more efficiently drain water is discharged.

On the other hand, from the viewpoint of lowering the height of the indoor unit, the heat exchanger is often placed close to the blower fan, so that the lower end of the heat exchanger is lower than the top of the blower fan. Thus, when the position of the lower end of the heat exchanger is lowered, the position of the drain pan is also lowered. For this reason, the difference in height between the drain pan and the drain path becomes small, and it becomes difficult to discharge drain water efficiently.

In addition, since the drain pan is located below the heat exchanger, upward movement of the drain pan is restricted. Therefore, if the heights of the first drain pan and the second drain pan are different, the position of one drain pan will be lower. For this reason, the height difference between the drain path and the position of the drain pan is reduced.

However, in this air conditioner indoor unit, the first drain pan and the second drain pan arranged below the lower end of the heat exchanger are arranged at substantially the same height. Therefore, it is possible to prevent one drain pan from being lowered. For this reason, in the indoor unit of this air conditioner, a large difference in height between the drain path for draining drain water and the drain pan can be ensured.

The indoor unit of the air conditioner according to claim 6 is the indoor unit of the air conditioner according to claim 5, wherein the heat exchanger has a substantially inverted V-shaped cross-sectional shape.

In this indoor unit of the air conditioner, the heat exchanger has a substantially inverted V-shaped cross section. For this reason, by placing the blower fan in the space surrounded by the inverted V-shaped heat exchanger, the front, upper and rear sides of the blower fan are covered, and the lower end is the top part of the blower fan. It is easy to arrange so that it is lower than the above. Thereby, the indoor unit of the air conditioner can be downsized in the height direction.

It should be noted that the heat exchanger is formed not only when it has a cross section of only a substantially inverted V-shaped portion, but also is formed by a substantially inverted V-shaped portion and portions extending downward from lower ends of both portions. It may have a cross-sectional shape.

The indoor unit of the air conditioner according to claim 7 is the indoor unit of the air conditioner according to claim 5 or 6, wherein a front lower end of the heat exchanger and a rear lower end of the heat exchanger are substantially the same. Located at height.

In this air conditioner indoor unit, the front lower end of the heat exchanger and the rear lower end of the heat exchanger are located at approximately the same height. The first drain pan and the second drain pan are arranged below the lower front end and below the lower rear end of the heat exchanger, respectively. For this reason, in this air conditioner indoor unit, even when the first drain pan and the second drain pan are arranged at a position near the lower end of the heat exchanger, the first drain pan and the second drain pan are substantially the same. Can be arranged at the same height.

The indoor unit of the air conditioner according to claim 8 is the indoor unit of the air conditioner according to any one of claims 5 to 7, wherein the heat exchanger has a shape that is symmetrical back and forth.

In this indoor unit of the air conditioner, the heat exchanger has a symmetrical shape in front and back. Therefore, the heat exchanger is shaped such that the front lower end and the rear lower end are at the same height. For this reason, even when the first drain pan and the second drain pan are arranged at a position close to the heat exchanger, the first drain pan and the second drain pan can be arranged so as to have substantially the same height.

(Brief description of drawings)

Fig. 1 is an external view of the air conditioner.

FIG. 2 is a configuration diagram of a refrigerant circuit.

FIG. 3 (a) is a front view of the indoor unit.

FIG. 3 (b) is a right side view of the indoor unit.

FIG. 4 is a right side view of the indoor unit with the upper casing removed.

FIG. 5 is a right side sectional view of the indoor unit. P2003 / 014274

6 Fig. 6 is a top view of the right part of the indoor unit with the upper casing removed. FIG. 7 is a right side view of the lower unit.

FIG. 8 is a top view of the right part of the lower unit.

FIG. 9 is a right side sectional view of the lower tut.

FIG. 10 (a) is a side sectional view of the indoor heat exchanger.

Figure 10 (b) is a side cross-sectional view of the virtual indoor heat exchanger.

FIG. 11 (a) is an enlarged schematic diagram of the lower front end of the indoor heat exchanger.

Fig. 11 (b) is an enlarged schematic diagram of the lower front end of the virtual indoor heat exchanger.

FIG. 12 is a side sectional view of an indoor heat exchanger according to another embodiment.

(Best mode for carrying out the invention)

[Overall configuration of air conditioner]

FIG. 1 shows an appearance of an air conditioner 1 to which an embodiment of the present invention is adopted.

The air conditioner 1 includes an indoor unit 2 mounted on an indoor wall or the like, and an outdoor unit 3 installed outdoors.

An indoor heat exchanger 50 is housed in the indoor unit 2, an outdoor heat exchanger 30 is housed in the outdoor unit 3, and the heat exchangers 30 and 50 are connected by refrigerant piping 4. This constitutes a refrigerant circuit.

[Schematic configuration of refrigerant circuit of air conditioner]

Fig. 2 shows the configuration of the refrigerant circuit of the air conditioner 1. The refrigerant circuit mainly includes an indoor heat exchanger 50, an accumulator 31, a compressor 32, a four-way switching valve 33, an outdoor heat exchanger 30, and an electric expansion valve 34.

The indoor heat exchanger 50 provided in the indoor unit 2 performs heat exchange with the contacting air. In addition, the indoor unit 2 is provided with a cross opening fan 71 for sucking indoor air, passing the indoor air through the indoor heat exchanger 50, and discharging the air after the heat exchange to the room. This cross mouth opening fan 71 is formed in an elongated cylindrical shape, and is arranged so that the central axis is parallel to the horizontal direction. The cross flow fan 71 is driven to rotate by an indoor fan motor 72 provided in the indoor unit 2. The detailed configuration of the indoor unit 2 will be described later. The outdoor unit 3 includes a compressor 32, a four-way switching valve 33 connected to the discharge side of the compressor 32, an accumulator 31 connected to the suction side of the compressor 32, and a four-way switch. An outdoor heat exchanger 30 connected to the valve 33 and an electric expansion valve 34 connected to the outdoor heat exchanger 30 are provided. The electric expansion valve 34 is connected to a pipe 41 via a filter 35 and a liquid shutoff valve 36, and is connected to one end of the indoor heat exchanger 50 via the pipe 41. The four-way switching valve 33 is connected to a pipe 42 via a gas shutoff valve 37, and is connected to the other end of the indoor heat exchanger 50 via the pipe 42. The pipes 41 and 42 correspond to the refrigerant pipe 4 in FIG. In addition, the outdoor unit 3 is provided with a propeller fan 38 for discharging the air after the heat exchange in the outdoor heat exchanger 30 to the outside. The propeller fan 38 is driven to rotate by an outdoor fan motor 39.

[Configuration of indoor unit]

Fig. 3 (a) shows a front view of the indoor unit 2, and Fig. 3 (b) shows a side view of the indoor unit 2. The indoor unit 2 has a shape that is long in the horizontal direction when viewed from the front, and has a two-tone color in which colors are vertically divided when viewed from the front and the side.

The indoor unit 2 is mainly constituted by an upper casing 6, a lower unit 7, and an indoor heat exchanger unit 5 housed inside the indoor unit 2. The upper casing 6 covers the upper part of the indoor unit 2. The lower unit 7 constitutes the lower part of the indoor unit 2. The upper casing 6 and the lower unit 7 are formed separately, and a boundary between the upper casing 6 and a part of the lower unit 7 appears as a horizontal line in the appearance of the indoor unit 2. Also, the upper casing 6 and a part of the lower unit 7 have different colors, and the two-tone color has different colors up and down on the horizontal line that is the boundary between the upper casing 6 and the lower unit 7. .

Hereinafter, each configuration of the indoor unit 2 will be described.

As shown in FIG. 4, the indoor heat exchanger unit 5 includes an indoor heat exchanger 50, an auxiliary pipe 51, an auxiliary support member 52, and the like. FIG. 4 is a right side view of the indoor unit 2 with the upper casing 6 removed.

FIG. 5 shows a side cross-sectional view of the indoor unit 2. The indoor heat exchanger 50 is mounted so as to surround the front of the cross flow fan 71 and the rear of the upper and lower sides thereof, and when the cross flow fan 71 rotates, the suction ports 60 1, 61 1 1 The air sucked from the air is passed to the cross flow fan 71 side to exchange heat with the refrigerant passing through the inside of the heat transfer tube. The indoor heat exchanger 50 includes four first heat exchangers 50a, a second indoor heat exchanger 50b, a third indoor heat exchanger 50c, and a fourth indoor heat exchanger 50d. It is divided into parts. The indoor heat exchanger 50 is formed by joining the indoor heat exchangers 50a, 50b, 50c, and 50d, respectively, so that both ends are bent downward in a side view. It is formed so as to have a U-shaped cross section.

Each of the indoor heat exchangers 50a, 50b, 50c, 50d has a plate shape that is long in the horizontal direction. Each indoor heat exchanger 50a, 50b, 50c, 50d is composed of a heat transfer tube that is bent multiple times at both ends and a plurality of strip-shaped fins through which the heat transfer tube passes. It is configured. The heat transfer tubes are folded back by U-shaped heat transfer tubes at both ends of each indoor heat exchanger 50a, 50b, 50c, 50d.

The first indoor heat exchanger 50a has an upper end inclined toward the front of the indoor unit 2, and is arranged so as to cover the upper part of the cross flow fan 71 from above the center to the rear side. The upper end of the second indoor heat exchanger 50b is inclined rearward of the indoor unit 2, and is disposed in front of the first indoor heat exchanger 50a. The upper end of the second indoor heat exchanger 50b is joined to the upper end of the first indoor heat exchanger 50a, and the first indoor heat exchanger 50a and the second indoor heat exchanger 50b are connected to each other. Are combined in an inverted V-shape in side view. The second indoor heat exchanger 50b is disposed so as to cover the upper part of the cross flow fan 71 from the center upper part to the front upper part.

The third indoor heat exchanger 50c is arranged below the second indoor heat exchanger 50b so as to cover the front of the cross flow fan 71. The upper end of the third indoor heat exchanger 50c is joined to the lower end of the second indoor heat exchanger 50b at an angle, and the third indoor heat exchanger 50c and the second indoor heat exchanger 5c are connected. 0b forms an obtuse angle. The third indoor heat exchanger 50c is parallel to the height direction, that is, the vertical direction, and is perpendicular to the lower cut 7 covering the horizontal plane below the indoor heat exchanger 50. ing. Also, the lower end of the third indoor heat exchanger 50c is the lower end of the indoor heat exchanger 50, The lower end of the indoor heat exchanger 50 c, that is, the lower end on the front side of the indoor heat exchanger 50 is located at substantially the same height as the center axis of the cross flow fan 71.

The fourth indoor heat exchanger 50d is arranged below the first indoor heat exchanger 50a so as to cover the rear of the cross flow fan 71. The upper end of the fourth indoor heat exchanger 50d is joined to the lower end of the first indoor heat exchanger 50a at an angle, so that the fourth indoor heat exchanger 50d and the first indoor heat exchanger are exchanged. An obtuse angle is formed by the container 50a. The fourth indoor heat exchanger 50d is parallel to the height direction, and is perpendicular to the lower unit 7 that covers a horizontal plane below the indoor heat exchanger 50. The lower end of the fourth indoor heat exchanger 50d is the lower end on the rear side of the indoor heat exchanger 50, and the lower end of the fourth indoor heat exchanger 50d, that is, the indoor heat exchanger 5 The lower end on the rear side of 0 is located at substantially the same height as the center axis of the cross flow fan 71.

The third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d have the same length in the height direction, and the third indoor heat exchanger 50c and the fourth indoor heat exchanger The upper and lower ends of 50 d are located at the same height. Therefore, the lower end on the front side and the lower end on the rear side of the indoor heat exchanger 50 are at the same height, and are located at substantially the same height as the center axis of the cross flow fan 71. The front lower end and the rear lower end of the indoor heat exchanger 50 extend vertically downward from the lower front and rear lower ends of the inverted V-shaped portion to substantially the same height as the center axis of the cross flow fan 71.

The first indoor heat exchanger 50 a, the second indoor heat exchanger 50 b, the third indoor heat exchanger 50 c, and the fourth indoor heat exchanger 50 d are both end portions (in the left-right direction in front view). Are fixed to each other by a fixing plate provided at the (end), and are integrally joined to form the indoor heat exchanger 50. The indoor heat exchanger 50 includes an inverted V-shaped portion formed by the first indoor heat exchanger 50a and the second indoor heat exchanger 50b, and a first indoor heat exchanger 50a. The second indoor heat exchanger 50b has a cross-sectional shape in which a linear portion extending downward from the lower end of each of the second indoor heat exchangers 50b is combined. The indoor heat exchanger 50 has a cross-sectional shape symmetrical to the front and rear with respect to a straight line parallel to the vertical direction passing through the inverted V-shaped vertex, and the first indoor heat exchanger 50a and the second indoor heat exchanger The heat exchanger 50b and the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are symmetrical back and forth. The indoor heat exchanger 50 has an inverted V-shape that is symmetrical in front and Although it is formed in a cross-sectional shape including the above, it has a shape that is long in the lateral direction when viewed from the front.

The auxiliary pipe 51 connects the indoor heat exchanger 50 to the refrigerant pipe 4 outside the indoor unit 2 so that the refrigerant flowing between the indoor heat exchanger 50 and the outdoor heat exchanger 30 can be used. Flows. The auxiliary pipe 51 is connected to a heat transfer pipe of the indoor heat exchanger 50 as shown in FIGS. FIG. 6 is a top view of the right side portion of the indoor unit 2 from which the upper casing 6 has been removed. The auxiliary pipe 51 protrudes from the right side surface of the indoor heat exchanger 50 and is routed in the space on the right side of the indoor heat exchanger 50. The auxiliary pipe 51 protrudes from the right side of the indoor heat exchanger 50 and is bent toward the rear side of the indoor unit 2. A plurality of auxiliary pipes 51 are put together and covered with a protective tube 53. It has been. The combined auxiliary pipe 51 extends downward in the space on the right side of the indoor heat exchanger 50 along the back side of the indoor unit 2, and in the lower space on the rear side of the indoor unit 2 on the left side of the indoor unit 2. And is connected to the refrigerant pipe 4.

The auxiliary support members 52 are provided near both side surfaces of the indoor heat exchanger 50, and support the indoor heat exchanger 50 from the inside as shown in FIG. Since the indoor heat exchanger unit 5 has an inverted V-shape and is open at the bottom, the indoor heat exchanger unit 5 is attached to the lower unit 7 to which the cross flow fan 71 and the indoor fan motor 72 are attached. It is covered from above and is supported by the lower unit 7 via the auxiliary support member 52.

The upper casing 6 constitutes the upper part of the indoor unit 2 as shown in FIGS. 3 and 5, and is composed of an upper front part 60, a top part 61, and upper side parts 62, 63. ing.

The upper front part 60 covers the front upper part of the indoor unit 2 and covers the front of the indoor heat exchanger 50. The upper front surface portion 60 is formed substantially flat, and a step is provided in a part thereof. On the upper surface of this step, there is provided a front-side suction port 61 composed of a slit-shaped opening that is long in the longitudinal direction of the indoor unit 2. The front suction port 600 is provided upward of the indoor unit 2.

The top surface part 61 covers the top surface of the indoor unit 2 and covers the upper part of the indoor heat exchanger 50. The top surface 6 1 has a top surface suction port 6 1 1 Is provided. The top surface suction port 61 1 is provided from the front side to the rear side of the top surface portion 61, and has a larger suction area than the front surface suction port 61. For this reason, sufficient air is sucked in from the rear side of the ceiling of the indoor unit 2.

The upper side surfaces 62, 63 cover the upper side of the indoor unit 2 and cover the side of the indoor heat exchanger 50. The upper side portions 62, 63 include an upper right side portion 62 and an upper left side portion 63. The upper right side portion 62 is disposed on the right side of the indoor heat exchanger 50 when viewed from the front, and the upper left side portion. The unit 63 is disposed on the left side of the indoor heat exchanger 50.

The lower end of the upper casing 6 is formed horizontally, and the upper casing 6 is covered with the Byeon unit 7, so that the boundary between the upper casing 6 and the lower unit 7 becomes a horizontal line and the indoor unit 2 is viewed from the front. Puyo Appears in side view

The lower unit 7 constitutes the lower part of the indoor unit 2 and, as shown in FIGS. 7 and 8, a lower casing 70, a cross-floor fan 71, an indoor fan motor 72, an electrical component box 7 3 etc. are modularized and configured.

[Lower casing]

The lower casing 70 is composed of a lower front part 74, a bottom part 75, lower side parts 76, 77, a support part 78, and the like, and has a different color from the upper casing 6.

The lower front part 74 is a part that appears in the field of view as the lower front part of the indoor unit 2 when viewed from the front, and is arranged such that the upper end is inclined toward the front side of the indoor unit 2. As shown in FIG. 3 (a), the upper end of the lower front part 74 is formed horizontally, and forms a horizontal boundary with the lower end of the upper casing 6. In addition, the lower front part 74 is provided with an outlet 744 formed of an opening along the longitudinal direction of the indoor unit 2. As shown in FIG. 5, the outlet 741 communicates with the space inside the support portion 78 in which the cross flow fan 71 is housed, and the air flow generated by the cross flow fan 71 Blows out into the room through the outlet 7 4 1. Further, the outlet 741 is provided with a horizontal flap 742 for guiding the air blown into the room. This water The flat flaps 742 are rotatably provided around an axis parallel to the longitudinal direction of the indoor unit 2, and are driven to rotate by a flap motor (not shown), so that the air outlets 74 are provided. 1 can be opened and closed.

The bottom surface portion 75 covers the bottom surface of the indoor unit 2 and is formed flat. The bottom part 75 is arranged horizontally, and the support part 78 is arranged thereon.

The lower side surfaces 76 and 77 are portions that appear in the field of view as the lower side surface of the indoor unit 2 when viewed from the side, and cover the lower side surface of the indoor unit 2. The lower side portions 76 and 77 include a lower right side portion 76 and a lower left side portion 77. The lower right side portion 76 is disposed on the right side of the indoor unit 2 in a front view, and the lower left side portion 7 7 is located on the left side of the indoor heat exchanger 50. Also, the upper ends of the lower side surfaces 76 and 77 are formed horizontally like the lower front surface 74. When the upper casing 6 is placed on the lower unit 7, the lower end of the upper case 6 and the lower front part 74 of the lower unit 7 and the upper ends of the lower side parts 76, 77 match so that a horizontal boundary is formed. A line is configured.

The support portion 78 is surrounded by a lower front portion 74, a bottom portion 75, and lower side portions 76, 77. The upper surface of the support portion 78 is formed by a lower front portion 74 and a lower side portion 76. , 77 located above the upper end of 7. A cross flow fan 71, an indoor fan motor 72, an electrical component box 73, an indoor heat exchanger unit 5, etc. are attached to the support section 78 from above, and a cross flow fan 71, an indoor fan motor 72 The electrical component box 73 and the indoor heat exchanger unit 5 are supported from below.

The support portion 78 supports the indoor heat exchanger 50 via the auxiliary support member 52 of the indoor heat exchanger unit 5. The upper surface of the support portion 78 is substantially as high as the center axis of the cross flow fan. As shown in FIG. 7, drain pans 781, 782 and a fan accommodating unit 787 are provided on the upper surface of the support unit 78.

The drain pans 781, 782 receive water droplets generated on the surface of the indoor heat exchanger 50 during heat exchange, and are formed by concave members that are recessed downward from the upper surface of the support portion 78. ing. These drain pans 781, 782 include a front drain pan 781, and a rear drain pan 782, and the front drain pan 781, as shown in FIG. 5, is connected to the third indoor heat exchanger 50c. It is arranged below, that is, below the lower front end of the indoor heat exchanger 50. The rear drain pan 782 is connected to the fourth indoor heat exchanger 50d, The heat exchanger 50 is arranged below the lower rear end. The front drain pan 781 and the rear drain pan 782 are arranged before and after the cross flow fan 71. The front drain pan 7 8 1 and the rear drain pan 7 8 2 are located at approximately the same height, and the bottom surface of the front drain pan 7 8 1 and the rear drain pan 7 8 2 is at the height of the center axis of the cross flow fan 7 1. Although it is at a lower position, it is arranged close to the lower end of the indoor heat exchanger 50. The front drain pan 781 and the rear drain pan 782 each have a bottom surface that receives drain water slightly inclined to the right side of the indoor unit 2. As shown in FIG. 8, a communication portion 783 connecting the front drain pan 781 and the rear drain pan 782 is provided on the right side of the support portion 78, and the communication portion 783 Is provided with a drain hole 784 penetrating downward. As shown in FIG. 9, the drain hole 784 communicates with the inside of a drain hose 785 for draining drain water from the drain pans 781, 782 to the outside. Drain water dropped from the indoor heat exchanger 50 is received by the front drain pan 781 and the rear drain pan 782, collected at the communication portion 783, and drained from the drain hole 784 to the drain hose 785. Is discharged outside the aircraft.

The fan accommodating portion 787 is a portion for accommodating the cross flow fan 71 and the indoor fan motor 72, and is provided near the center of the upper surface of the support portion 78. The fan accommodating portion 787 is formed of a member that is recessed in a semi-cylindrical shape downward from the upper surface of the support portion 78, and accommodates the lower half of the cross flow fan 71 and the indoor fan motor 72. Further, inside the support portion 78, an air path communicating the housed cross-flow fan 71 and the outlet 741 is provided.

Further, the support portion 78 has a tongue portion 786 projecting upward from the upper surface of the support portion 78 between the rear drain pan 782 and the cross flow fan 71. The tongue 786 covers the rear of the cross flow fan 71, and the upper end of the tongue 786 is located at a height slightly lower than the top of the cross flow fan 71.

As described above, the front drain pan 781, the rear drain pan 782, and the fan accommodating section 787 are provided on the upper surface of the support section 78, and the tongue section 7886 protrudes upward. The other portion of the upper surface of 78 is formed substantially flat and horizontal, and is located at substantially the same height as the center line of cross flow fan 71. As described above, the highest part of the support part 78 is the tongue part 78 6, but the tongue part 78 6 is located below the height of the top part of the cross flow fan 71 . The upper surface of the support portion 78 is located above the upper ends of the lower front surface portion 74 and the lower side surface portions 76, 77. For this reason, each part of the lower casing 70 including the support part 78 is lower than the height of the top part of the cross flow fan 71.

The back side of the upper surface of the support portion 78 is also lower than the height of the crossflow fan 71, but the portion between the top surface 61 of the upper casing 6 and the back side of the upper surface of the support portion 78 is also provided. Is closed by a mounting plate 8 attached to the indoor wall (see Fig. 5). The installation plate 8 has substantially the same length as the indoor heat exchanger 50 in the longitudinal direction of the indoor unit 2, and covers the rear side of the indoor heat exchanger 50. The mounting plate 8 covers the rear side of the indoor unit 2 to form an air flow path through which air to be heat-exchanged in the indoor heat exchanger 50 passes together with the upper casing 6, and particularly the rear air flow. Forming a road.

[Cross flow fan]

The cross flow fan 71 is formed in an elongated cylindrical shape, and is arranged so that the central axis is parallel to the horizontal direction. Blades are provided on the peripheral surface of the cross flow fan 71, and the cross flow fan 71 rotates around a central axis to generate an air flow. This air flow is a flow of air that is taken in from the front intake port 61 and the top surface intake port 61 1 and passes through the indoor heat exchanger 50 and blows out from the outlet port 74 1 to the room. The cross flow fan 71 is located substantially at the center of the indoor unit 2 in a side view. The cross flow fan 71 is supported by the support portion 78, and the upper half of the supported cross flow fan 71 protrudes upward from the upper surface of the support portion 78.

[Indoor fan motor]

The indoor fan motor 72 drives the cross flow fan 71 to rotate around the central axis. The indoor fan motor 72 has a thin cylindrical shape having substantially the same diameter as the cross flow fan 71. As shown in FIG. 8, the indoor fan motor 72 is disposed coaxially with the cross flow fan 71 on the right side of the cross flow fan 71, and the indoor fan motor 72 is attached to the support portion 78. In this state, the heights of the tops of the indoor fan motor 72 and the crossflow fan 71 are almost the same ( See Figure 7).

[Electric component box]

The electrical component box 73 houses a control board 731, which controls the operation of the indoor unit 2, as shown in FIGS. The electrical component box 73 has a rectangular parallelepiped box shape, is disposed between the lower right side surface portion 76 of the lower casing 70 and the support portion 78, and is provided with the indoor heat exchanger unit 5. Located on the right side. The electrical component box 73 is attached to and supported by the right side of the support portion 78 on the right side of the indoor fan motor 72, before the indoor heat exchanger unit 5 is attached to the lower unit 7. Can be attached to the support portions 7 and 8. Further, the electrical component box 73 is disposed near the front side, and the space behind the electrical component box 73 is a space through which the above-described auxiliary pipe 51 of the indoor heat exchanger unit 5 passes. The electrical component box 73 is arranged such that, among the control components mounted on the control board 731, high-power components 7332 such as large-capacity capacitors and power transistors are aligned with the indoor fan motor 72 in the axial direction. The indoor fan motor 72 and the electrical component box 73 are arranged so as to overlap in a side view. When supported by the lower casing 70, the upper surface of the electrical component box 73 is positioned at approximately the same height as the top of the indoor fan motor 72, that is, the top of the cross flow fan 71. I have.

As described above, all the parts of the indoor fan motor 72, the electrical component box 73, and the lower casing 70 are set to be equal to or less than the height of the top of the cross flow fan 71 supported by the lower casing 70. The lower unit 7 has a relatively small size and shape in the height direction as a whole.

〔Characteristic〕

[1]

In the indoor heat exchanger 50 provided in the indoor unit 2 of the air conditioner 1, the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d have the same length. In the side view, when the total length of the indoor heat exchangers 50 is the same, when the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are different in length from each other, The maximum value of the positional error at the end of the indoor heat exchanger 50 due to the mounting angle error is reduced.

For example, consider a virtual indoor heat exchanger 500 as shown in Fig. 10 (b). In addition, FIG. 10A shows the indoor heat exchanger 50 provided in the indoor unit 2 of the air conditioner 1. Like the indoor heat exchanger 50, the virtual indoor heat exchanger 500 includes the first indoor heat exchanger 500a, the first indoor heat exchanger 500b, the first indoor heat exchanger 500c, and the fourteenth indoor heat exchanger. The heat exchanger consists of four parts, 500 d. The configuration of each indoor heat exchanger 500a, 500b, 500c, 500d is almost the same as the indoor heat exchanger 50, but the first indoor heat exchanger 500 that constitutes the front end of the virtual indoor heat exchanger 500 The unit 500c and the fourteenth indoor heat exchanger 500d constituting the rear end are different in length, and the thirteenth indoor heat exchanger 500c is longer. However, the total length of the 13th indoor heat exchanger 500c and the 14th indoor heat exchanger 500d is the total length of the 3rd indoor heat exchanger 50c and the 4th indoor heat exchanger 50d. Is the same as Therefore, the indoor heat exchanger 50 and the virtual indoor heat exchanger 500 have the same length in side view, and have substantially the same surface area.

The effect of the mounting error of each indoor heat exchanger on the position error of the lower end of the indoor heat exchanger in the indoor heat exchanger 50 and the virtual indoor heat exchanger 500 will be discussed below. FIG. 11A shows a schematic diagram of the front lower end of the indoor heat exchanger 50, and FIG. 11B shows a schematic diagram of the front lower end of the virtual indoor heat exchanger 500. In both drawings, the indoor heat exchangers 50b, 50c, 500b, and 500c are simplified and represented by straight lines for easy understanding.

When the third indoor heat exchanger 50c is joined to the lower end of the second indoor heat exchanger 50b at a completely accurate angle, the third indoor heat exchanger 50c is connected as shown by the two-dot chain line in the figure. Although c is parallel to the vertical direction, a certain mounting angle error α actually occurs. Therefore, the third indoor heat exchanger 50c forms an angle _α with respect to the vertical direction. Also in the virtual indoor heat exchanger 500 shown in FIG. 11 (b), the thirteenth indoor heat exchanger 500c is joined to the lower end of the twelfth indoor heat exchanger 500b with the same mounting angle error α. Accordingly, the third indoor heat exchanger 500c also forms an angle α with the vertical direction. In this way, when the indoor heat exchangers 50c and 500c are joined with an attachment angle error, the further away from the joining position, the more the indoor heat exchanger 50c, Each part of 500 c is separated. Therefore, even if the mounting angle error α is the same, the position error AD 2 of the lower end of the long 13th indoor heat exchanger 500 c Is larger than the position error AD1 at the lower end of the third indoor heat exchanger 50c. That is, the position error AD2 of the front lower end of the virtual indoor heat exchanger 500 is larger than the position error AD1 of the front lower end of the indoor heat exchanger 500.

As described above, the position error of the lower end of the indoor heat exchanger increases as the length of the lower end of the indoor heat exchanger increases. Conversely, the position error of the lower end of the indoor heat exchanger becomes smaller as the portion constituting the lower end of the indoor heat exchanger becomes shorter. Therefore, if the total length of the indoor heat exchanger is the same, the length of the part forming the front lower end and the part forming the rear side of the indoor heat exchanger are the same, and the length is different The maximum value of the position error at the lower end is smaller than in the case. In the indoor heat exchanger 50 employing the present invention, the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d have the same length. For this reason, in the indoor heat exchanger 50, the error in the mounting angle of the third indoor heat exchanger 50c and the error in the mounting angle of the fourth indoor heat exchanger 50d are different from those in the indoor heat exchanger 50. The influence on the position error at the lower end is relatively small. Thus, in the indoor heat exchanger 50, the tolerance of the mounting angle of the third indoor heat exchanger 50c and the tolerance of the mounting angle of the fourth indoor heat exchanger 50d are reduced. I have. Also, the ease of assembling the indoor heat exchanger 50 is improved by reducing the allowable error of the mounting angle.

[2]

The indoor heat exchanger 50 included in the indoor unit 2 of the air conditioner 1 includes a portion having a substantially inverted V-shape in side view and a lower end before and after the portion having a substantially inverted V-shape. Each of the portions is configured to extend downward. For this reason, it is possible to easily arrange the indoor heat exchanger 50 so as to cover the front, the upper side, and the rear side of the crossflow fan 71. Therefore, the position of the indoor heat exchanger 50 is relatively low, and the size of the indoor unit 2 in the height direction is reduced. Further, since the indoor heat exchanger 50 is arranged so as to surround the periphery of the cross port opening fan 71, the efficiency of heat exchange is improved.

[3]

As described above, when the indoor heat exchanger 50 is arranged so as to surround the cross flow fan 71, the distance accuracy between each part of the indoor heat exchanger 50 and the cross flow fan 71 becomes important. Come. Therefore, the tolerance of the mounting angle as described above is reduced. Is more effective.

[ Four ]

In the indoor unit 2 of the air conditioner 1, the indoor heat exchanger 50 is formed in a symmetrical shape in the front-back direction. Therefore, the indoor heat exchanger 50 can be configured by combining heat exchangers having a common shape before and after. Thereby, the manufacturing cost of the indoor heat exchanger 50 can be reduced. Specifically, the first indoor heat exchanger 50a and the second indoor heat exchanger 50b, or the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are respectively common. It can be manufactured using fins having a shape, and the cost can be reduced by sharing parts. Not only the fins but also the side surfaces of the first indoor heat exchanger 50a, the second indoor heat exchanger 50b, the third indoor heat exchanger 50c, and the fourth indoor heat exchanger 50d. The U-shaped heat transfer tubes to be attached can be shared. In addition, fixed members provided on both side surfaces of the first indoor heat exchanger 50a, the second indoor heat exchanger 50b, the third indoor heat exchanger 50c, and the fourth indoor heat exchanger 50d. Boards can also be shared.

[ Five ]

In the indoor unit 2 of the air conditioner 1, the indoor heat exchanger 50 is disposed so as to cover the front, upper and rear sides of the cross flow fan 71, and both lower ends of the indoor heat exchanger 50 are cross flow fans. 7 It is located at approximately the same height as the central axis of 1. Therefore, the indoor heat exchanger 50 is arranged at a relatively low position inside the indoor unit 2. For this reason, the size in the height direction of the indoor unit 2 is reduced, and the indoor unit 2 is downsized.

[6]

When the lower end of the indoor heat exchanger 50 is disposed at a relatively low position as described above, the positions of the drain pans 781, 782 disposed below the indoor heat exchanger 50 are also lowered. I will. Drain water received by the drain pans 781, 782 is discharged to the outside through the drain hole 784 and the drain hose 785. In this case, if the height difference between the drain hose 785 and the drain pans 781 and 782 is large, drain water can be discharged efficiently.

On the other hand, the drain pans 781, 782 are located below the lower end of the indoor heat exchanger 50. Therefore, upward movement is restricted. Therefore, if the drain pans 781 and 782 are arranged at different heights, the position of one of the drain pans will be lowered.

However, in the indoor unit 2 of the air conditioner 1, the drain pans 781, 782 are arranged at the same height. For this reason, the height difference between the drain hose 785 and the drain pans 781 and 782 can be as large as possible. As a result, drain water can be efficiently discharged.

[7]

In the indoor unit 2 of the air conditioner, the indoor heat exchanger 50 is formed in a symmetrical shape in the front and back, and the lower ends of the front and rear are at the same height. In the side view, if the position of the lower end before and after the indoor heat exchanger 50 is changed without changing the maximum position and the total length of the indoor heat exchanger 50, one lower end becomes lower and the other lower end becomes lower. Will be higher. In this case, if the drain pans 781 and 782 are arranged close to the lower ends before and after the indoor heat exchanger 50, the heights of the front drain pan 781 and the rear drain pan 782 will be different. Would. Also, even when the positions of the lower ends before and after the indoor heat exchanger 50 are different, if the heights of the front drain pan 781 and the rear drain pan 782 are the same, the height of the indoor heat exchanger 50 is low. The distance between the drain pan located below the lower end and the lower end of the indoor heat exchanger 50 becomes longer. In order for the drain pans 781, 782 to receive drain water dripping from the lower end of the indoor heat exchanger 50 more reliably, the drain pans 781, 782 must be placed at the lower end of the indoor heat exchanger 50. It is desirable to be arranged close to.

In the indoor unit 2 of this air conditioner, the lower ends before and after the indoor heat exchanger 50 are at the same height. For this reason, the front drain pan 781 and the rear drain pan 782 are respectively arranged near the lower ends before and after the indoor heat exchanger 50, and the front drain pan 781 and the rear drain pan 782 are the same. Located at height. As a result, in the indoor unit 2 of the air conditioner 1, the drain pans 781 and 782 can more reliably receive the drain water, and the drain water can be efficiently discharged.

[8]

In the indoor unit 2 of the air conditioner 1, the indoor heat exchanger 50 is formed in a symmetrical shape in the front-back direction. Therefore, by using the same parts before and after the indoor heat exchanger 50, the manufacturing cost of the indoor heat exchanger 50 can be reduced. In particular The first indoor heat exchanger 50a and the second indoor heat exchanger 50b, or the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are connected by fins of the same shape. Can be created. In addition to the fins, the first indoor heat exchanger 50a, the second indoor heat exchanger 50b, the third indoor heat exchanger 50c, and the fourth indoor heat exchanger 50d A U-shaped heat transfer tube attached to the side can also be shared. Further, fixing plates provided on both side surfaces of the first indoor heat exchanger 50a, the second indoor heat exchanger 50b, the third indoor heat exchanger 50c, and the fourth indoor heat exchanger 50d are also provided. Can be standardized.

[Other embodiments]

[1]

In the above embodiment, the indoor heat exchanger 50 has a substantially inverted V-shaped cross section in a side view, but has a V-shaped cross section in a side view as shown in FIG. It can be an indoor heat exchanger 54. The indoor heat exchanger 54 includes a fifth indoor heat exchanger 54a, a sixth indoor heat exchanger 54b, a seventh indoor heat exchanger 54c, and an eighth indoor heat exchanger 54d. Have been. The fifth indoor heat exchanger 54a and the sixth indoor heat exchanger 54b form a portion having a V-shape in a side view. The seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d form straight portions that extend upward from front and rear ends of a V-shaped portion. The seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d have the same length. In this indoor heat exchanger 54 as well, similar to the feature (1) above, the tolerance of the mounting angle of the seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d is reduced. As a result, the assemblability of the indoor heat exchanger 54 is improved.

Further, such a V-shaped indoor heat exchanger 54 may be arranged by rotating and moving.

[2]

In the above embodiment, the indoor heat exchanger 50 includes a portion having an inverted V-shape in a side view, and a linear portion extending downward from lower ends before and after the portion having the inverted V-shape. , But may have a shape other than the inverted V-shape. For example, it may have an arcuate shape or an inverted u-shape. (Industrial applicability)

By using the heat exchanger and the indoor unit of the air conditioner according to the present invention, it is possible to suppress a decrease in the heat exchange capacity and to alleviate the tolerance of the mounting angle of the heat exchange unit.

Claims

The scope of the claims

The heat exchangers (50, 54) are constructed by joining multiple heat exchange sections (50a-50d, 54a-54d) and arranged in the indoor unit (2) of the air conditioner (1). And a first heat exchange section (50a, 50b, 54a, 54b)

A second heat exchange section (50c, 54c) joined to one end of the first heat exchange section (50a, 50b, 54a, 54b) at an angle;

A third heat exchange section (50 d, 54 d) joined at an angle to the other end of the first heat exchange section (50 a, 50 b, 54 a, 54 b);

With

The second heat exchange section (50c, 54c) and the third heat exchange section (50d, 54d) have substantially the same length,

Heat exchangers (50, 54).

2.

The first heat exchange section (50a, 50b) has a substantially inverted V-shaped cross section, and the second heat exchange section (50c) and the third heat exchange section (50d) Extending downward from the front and rear lower ends of the first heat exchange section (50a, 50b), respectively;

The heat exchanger (50) according to claim 1.

3.

It has a symmetrical shape back and forth,

The second heat exchange section (50c, 54c) and the third heat exchange section (50d, 54d) are symmetrical back and forth,

Heat exchanger (50, 54) according to claim 1 or 2.

Four.

A heat exchanger (50, 54) according to any of claims 1 to 3,

A blower fan (71) arranged so as to be covered by the heat exchanger (50, 54);

The air conditioner equipped with (1) indoor unit (2).

Five.

Blower fan (71),

The heat of Claim 1 which covers the front, the upper part, and the back of said blower fan (71), and is arrange | positioned so that the front lower end and the rear lower end may become below the height of the top part of said blower fan (71). Exchanger (50),

A first drain pan (78) disposed below the lower front end of the heat exchanger (50)

1) and

A second drain pan (78) arranged below the rear lower end of the heat exchanger (50)

2) and

A drain path (785) through which drain water discharged from the first drain pan (781) and the second drain pan (782) passes;

With

The first drain pan (781) and the second drain pan (782) are arranged at substantially the same height,

Indoor unit (2) of air conditioner (1).

6.-the heat exchanger (50) has a substantially inverted V-shaped cross-sectional shape;

The indoor unit (2) of the air conditioner (1) according to claim 5.

7.

A front lower end of the heat exchanger (50) and a rear lower end of the heat exchanger (50) are located at substantially the same height;

The indoor unit (2) of the air conditioner (1) according to claim 5 or 6.

8.

The heat exchanger (50) has a symmetrical shape back and forth;

The indoor unit (2) of the air conditioner (1) according to any one of claims 5 to 7.