KR100605923B1 - Indoor unit of heat exchanger and air conditioner - Google Patents

Abstract

The present invention provides an indoor unit of a heat exchanger and an air conditioner that can suppress a decrease in heat exchange capacity and can alleviate a tolerance of the mounting angle of the heat exchanger. In the indoor heat exchanger 50, a plurality of heat exchangers 50a, 50b, 50c, 50d are joined to each other, and the indoor heat exchanger 50 is arranged in the indoor unit 2 of the air conditioner. The heat exchanger 50a, the 2nd indoor heat exchanger 50b, the 3rd indoor heat exchanger 50c, and the 4th indoor heat exchanger 50d are provided. The third indoor heat exchanger 50c is joined at an angle to one end of the first indoor heat exchanger 50a and the second indoor heat exchanger 50b. The fourth indoor heat exchanger 50d is joined at an angle to the other ends of the first indoor heat exchanger 50a and the second indoor heat exchanger 50b. The third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d have substantially the same length.

Indoor unit, heat exchanger, fan motor, cross flow fan, drain fan

Description

Indoor unit of heat exchanger and air conditioner {HEAT EXCHANGER AND AIR CONDITIONER INDOOR UNIT}

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

Background Art A heat exchanger formed by combining a plurality of heat exchangers at an angle has been conventionally used. Such a heat exchanger can be formed into various shapes that meet the design requirements and the like by a combination method of the heat exchanger. In addition, many heat exchange parts which form a heat exchanger have various lengths, respectively (refer to Unexamined-Japanese-Patent No. 2001-4162). For example, some heat exchangers provided in the indoor unit of the air conditioner are formed in an inverted V shape so as to surround the blowing fan. The heat exchanger is formed with a reverse V-shape by combining heat exchangers of various lengths, and the heat exchanger covering the front of the blower fan and the heat exchanger covering the rear upper part of the blower fan have different lengths.

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 exchange unit may become a problem. That is, when there is an error in the mounting angle of the heat exchanger, an error occurs at an end position of the heat exchanger, which may cause inconvenience in arrangement of the heat exchanger. Therefore, the error of the mounting angle of the heat exchanger is preferably as small as possible, but if too strict tolerance is required, the assemblability of the heat exchanger is reduced.

On the other hand, even if the mounting angle error of the heat exchange part is the same, the position error of the end part of a heat exchanger becomes large, so that the length of a heat exchange part becomes long. For this reason, it is also conceivable to reduce the tolerance of a mounting angle by shortening the length of a heat exchange part.

However, if the length of the heat exchanger is made small, the heat exchange capacity of the heat exchanger will be affected. In other words, if the length of the heat exchanger is reduced, the total surface area of the heat exchanger in which the surface areas of the respective heat exchanger are added up is reduced, and the heat exchange capacity of the heat exchanger is reduced. In this way, only shortening the length of the heat exchanger in order to alleviate the tolerance of the mounting angle of the heat exchanger causes a decrease in the heat exchange ability.

SUMMARY OF THE INVENTION An object of the present invention is to provide an indoor unit of a heat exchanger and an air conditioner that can suppress a decrease in heat exchange capacity and can alleviate a tolerance of a mounting angle of a heat exchanger.

The heat exchanger of Claim 1 is comprised by joining several heat exchangers, and is equipped with the 1st heat exchange part, the 2nd heat exchange part, and a 3rd heat exchange part in the heat exchanger arrange | positioned at the indoor unit of an air conditioner. The second heat exchanger is joined to one end of the first heat exchanger at an angle. The third heat exchanger is joined to the other end of the first heat exchanger at an angle. And the second heat exchange part and the third heat exchange part have approximately the same length.

In this heat exchanger, the second heat exchange part and the third heat exchange part have the same length. When the total lengths of the heat exchangers are the same, the maximum error value at the end position of the heat exchanger due to the error in the mounting angle is smaller in the case where the lengths of the second heat exchange part and the third heat exchange part are the same. That is, when the length of a 2nd heat exchange part and a 3rd heat exchange part is different, one side becomes long and the other becomes short. In this case, the position error of the edge part of the heat exchanger by a long heat exchange part becomes large. On the other hand, if the total length of a heat exchanger is the same, the length of the heat exchange part in case the length of a 2nd heat exchange part and a 3rd heat exchange part is the same is shorter than the length of the longer heat exchange part in a case where a length differs. For this reason, in this heat exchanger, the fall of the heat exchange ability can be suppressed and the tolerance of the mounting angle of a heat exchange part can be alleviated.

The heat exchanger of Claim 2 is a heat exchanger of Claim 1 WHEREIN: A 1st heat exchange part has a substantially reverse V-shaped cross section shape. The second heat exchange part and the third heat exchange part extend downward from the front and rear lower ends of the first heat exchange part, respectively.

When the lower ends of the second heat exchange part and the third heat exchange part are respectively the lower ends of the heat exchanger, the error of the mounting angles of the second heat exchange part and the third heat exchange part affects the position error of the lower end of the heat exchanger.

However, in this heat exchanger, since the length of a 2nd heat exchange part and a 3rd heat exchange part is substantially the same, the maximum value of the lower position error of the heat exchanger by the error of a mounting angle becomes small. For this reason, in this heat exchanger, the tolerance of the mounting angle of a 2nd heat exchange part and a 3rd heat exchange part can be alleviated.

The heat exchanger of Claim 3 has a symmetrical shape back and forth in the heat exchanger of Claim 1 or 2, and the 2nd heat exchange part and the 3rd heat exchange part are symmetrical back and front.

In this heat exchanger, since the 2nd heat exchange part and the 3rd heat exchange part are symmetrical back and front, the length of a 2nd heat exchange part and a 3rd heat exchange part becomes substantially the same. For this reason, the tolerance of the mounting angle of a 2nd heat exchange part and a 3rd heat exchange part can be alleviated.

The indoor unit of the air conditioner of Claim 4 is equipped with the heat exchanger of any one of Claims 1-3, and the blowing fan arrange | positioned so that it may be covered by a heat exchanger.

In the indoor unit of this air conditioner, a blowing fan is arrange | positioned so that it may be covered by a heat exchanger. Therefore, in order to maintain the distance between the heat exchanger and the blowing fan at a predetermined value, the accuracy of the distance between the heat exchanger and the blowing fan is important. For this reason, it is preferable that the shape of a heat exchanger has high precision. Therefore, the present invention that can alleviate the tolerance of the mounting angle of the second heat exchange part and the third heat exchange part is particularly effective.

An indoor unit of the air conditioner according to claim 5 includes a blowing fan, a heat exchanger, a first drain pan, a second drain pan, and a drain path. In the heat exchanger of Claim 1, the heat exchanger is arrange | positioned so that the front lower part and the rear lower end may be below the height of the top part of a blower fan, covering the front, upper part, and rear part of a blowing fan. The first drain pan is disposed below the front lower end of the heat exchanger. The second drain pan is disposed below the rear lower end of the heat exchanger. The drain path passes through the drain water discharged from the first drain pan and the second drain pan. The first drain pan and the second drain pan are disposed at substantially the same height.

In general, in an indoor unit of an air conditioner having a heat exchanger, since the heat exchanger functions as an evaporator at the time of cooling, moisture in the air condenses on the surface of the heat exchanger, and drain water is generated. For this reason, the indoor unit of an air conditioner is normally equipped with the drain pan which receives drain water. This drain pan is normally arrange | positioned under a heat exchanger in order to receive the drain water dripped under the heat exchanger. Therefore, when a heat exchanger is arrange | positioned so that the blower fan may cover front and rear, a drain pan is arrange | positioned below the lower front side of a heat exchanger, and below the rear lower side, respectively. In this case, the drain pan on the front side and the drain pan on the rear side are often disposed at different heights (see Japanese Patent Laid-Open No. 2000-74409). For example, it is arrange | positioned so that the front drain pan may be low and the rear drain pan may be high, or the front drain pan may be high and the rear drain pan may be low.

The drain water dripped by the drain pan is discharged | emitted from the outlet of the drain pan to the exterior via the drain path. In this case, the drain water is discharged efficiently as the height difference between the position of the drain pan and the position of the drain path is large.

On the other hand, from the viewpoint of lowering the height of the indoor unit, the heat exchanger is often arranged to approach the blowing fan so that the lower end of the heat exchanger is lower than the normal portion of the blowing fan. When the position of the lower end of the heat exchanger is thus lowered, the position of the drain pan is also lowered. For this reason, the height difference between a drain pan and a drain path becomes small, and it becomes difficult to discharge drain number efficiently.

In addition, since the drain pan is disposed below the heat exchanger, the movement of the drain pan above is limited. Therefore, if the heights of the first drain pan and the second drain pan are different, the position of one drain pan is lowered. For this reason, the height difference between the position of a drain path and a drain pan becomes small.

However, in the indoor unit of this air conditioner, the 1st drain pan and the 2nd drain pan arrange | positioned under the lower end of a heat exchanger are arrange | positioned at substantially the same height. Therefore, it can suppress that the drain pan of one side becomes low. For this reason, in the indoor unit of this air conditioner, the height difference of the drain path and the drain pan which discharge | releases drain water can be ensured large.

The indoor unit of the air conditioner of Claim 6 is an indoor unit of the air conditioner of Claim 5 WHEREIN: A heat exchanger has a cross-sectional shape of substantially inverted V shape.

In the indoor unit of this air conditioner, the heat exchanger has a substantially inverted V-shaped cross-sectional shape. For this reason, by arranging a blowing fan in the space enclosed by an inverted V-shaped heat exchanger, it is easy to arrange | position so that the lower end may become lower than the normal part of a blowing fan by covering the front, upper part, and rear part of a blowing fan. As a result, the indoor unit of the air conditioner can be miniaturized in the height direction.

In addition, the heat exchanger may not only have the cross-sectional shape of the substantially inverted V-shaped portion but also have the cross-sectional shape formed by the portion of the substantially inverted V-shaped portion and the portion extending downward from the lower ends of both. .

In the indoor unit of the air conditioner of Claim 7, in the indoor unit of the air conditioner of Claim 5 or 6, the front lower end of a heat exchanger and the rear lower end of a heat exchanger are located in substantially the same height.

In the indoor unit of this air conditioner, 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 disposed below the front lower end of the heat exchanger and below the rear lower end, respectively. For this reason, in the indoor unit of this air conditioner, even if the 1st drain pan and the 2nd drain pan are arrange | positioned near the lower end of a heat exchanger, it arrange | positions so that a 1st drain pan and a 2nd drain pan may become substantially the same height. can do.

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 symmetrical shape back and forth.

In the indoor unit of this air conditioner, the heat exchanger has a symmetrical shape back and forth. Therefore, the heat exchanger has a shape such that the front lower end and the rear lower end are at the same height. For this reason, even when a 1st drain pan and a 2nd drain pan are arrange | positioned near a heat exchanger, a 1st drain pan and a 2nd drain pan can be arrange | positioned so that it may become substantially the same height.

1 is an external view of an air conditioner.

2 is a configuration diagram of a refrigerant circuit.

3A is a front view of the indoor unit.

3B is a right side view of the indoor unit.

4 is a right side view of the indoor unit without the upper casing.

5 is a right side cross-sectional view of the indoor unit.

Fig. 6 is a top view of the right part of the indoor unit without the upper casing.

7 is a right side view of the lower unit.

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

9 is a right side cross-sectional view of the lower unit.

10A is a side sectional view of an indoor heat exchanger.

10B is a side cross-sectional view of the virtual indoor heat exchanger.

11A is an enlarged schematic view of the front lower end of the indoor heat exchanger.

11B is an enlarged schematic view of the front lower end of the virtual indoor heat exchanger.

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

[Whole structure of air conditioner]

1 shows an appearance of an air conditioner 1 in which an embodiment of the present invention is employed.

This air conditioner 1 is equipped with the indoor unit 2 attached to the indoor wall surface, etc., and the outdoor unit 3 installed in the outdoors.

The indoor heat exchanger 50 is housed in the indoor unit 2, the outdoor heat exchanger 30 is housed in the outdoor unit 3, and each heat exchanger 30, 50 is connected by the refrigerant pipe 4. The refrigerant circuit is constituted by.

[Schematic outline of refrigerant circuit of air conditioner]                 

The structure of the refrigerant circuit of the air conditioner 1 is shown in FIG. This refrigerant circuit mainly comprises 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 air which contacts. In addition, the indoor unit 2 is provided with a cross flow fan 71 for sucking the indoor air and passing it through the indoor heat exchanger 50 to discharge the air after the heat exchange is performed to the room. This crossflow fan 71 is comprised by a long thin cylinder shape, and is arrange | positioned so that a center axis | shaft may become parallel in a horizontal direction. The cross flow fan 71 is rotationally driven by an indoor fan motor 72 provided in the indoor unit 2. The detailed structure of the indoor unit 2 is demonstrated 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 switching valve 33. ) And an electric expansion valve 34 connected to the outdoor heat exchanger 30. The electric expansion valve 34 is connected to the pipe 41 via the filter 35 and the liquid closing valve 36, and is connected to one end of the indoor heat exchanger 50 through the pipe 41. In addition, the four-way switching valve 33 is connected to the pipe 42 via the gas closing valve 37, and is connected to the other end of the indoor heat exchanger 50 through this pipe 42. These piping 41 and 42 correspond to the refrigerant | coolant piping 4 of 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. This propeller fan 38 is rotationally driven by an outdoor fan motor 39.

[Constitution of the room]

The front view of the indoor unit 2 is shown to FIG. 3A, and the side view of the indoor unit 2 is shown to FIG. 3B. The indoor unit 2 has a shape that is long in the horizontal direction when viewed from the front, and is composed of a two-tone color in which colors are divided up and down when viewed from the front and when viewed from the side.

The indoor unit 2 is mainly configured by the indoor heat exchanger unit 5 housed inside the upper casing 6, the lower unit 7, and the indoor unit 2. The upper casing 6 covers the upper part of the indoor unit 2. The lower unit 7 constitutes a lower part of the indoor unit 2. The upper casing 6 and the lower unit 7 are formed separately, and the boundary between the upper casing 6 and a part of the lower unit 7 is shown as a horizontal line in the appearance of the indoor unit 2. In addition, the upper casing 6 and a part of the lower unit 7 are different from each other, and a two-tone color of different colors is formed up and down on the horizontal line which is the boundary between the upper casing 6 and the lower unit 7. .

Hereinafter, each structure of the indoor unit 2 is demonstrated.

〈Indoor Heat Exchanger Unit〉

The indoor heat exchanger unit 5 is comprised by the indoor heat exchanger 50, the auxiliary piping 51, the auxiliary support member 52, etc. as shown in FIG. 4 is a right side view of the indoor unit 2 in a state where the upper casing 6 is removed.

5 is a side cross-sectional view of the indoor unit 2.

The indoor heat exchanger 50 is mounted so as to surround the front, the upper and the rear of the cross flow fan 71, and crosses the air sucked from the inlets 601 and 611 by the rotation of the cross flow fan 71. It passes to the flow fan 71 side, and makes heat exchange with the refrigerant | coolant which passes inside a heat exchanger tube. The indoor heat exchanger 50 includes the first indoor heat exchanger 50a and the second indoor heat exchanger 50b serving as the first heat exchanger, the third indoor heat exchanger 50c serving as the second heat exchanger, and the third heat exchanger used. It is divided into four parts of the 4th indoor heat exchanger 50d. The indoor heat exchanger 50 is formed to have a generally inverted V-shaped cross-sectional shape in which both ends bend downward when viewed from the side by joining the respective indoor heat exchangers 50a, 50b, 50c, and 50d. It is.

Each indoor heat exchanger (50a, 50b, 50c, 50d) has a plate-like shape that is long in the horizontal direction, respectively. Each indoor heat exchanger 50a, 50b, 50c, 50d is comprised from the heat exchanger tube which is bent back several times at both side ends, and the some fin of the single stage through which a heat exchanger tube penetrates. The heat transfer tube is folded back by the U-shaped heat transfer tube at both side ends of each indoor heat exchanger (50a, 50b, 50c, 50d).

The upper end of the 1st indoor heat exchanger 50a is inclined toward the front of the indoor unit 2, and is arrange | positioned so that the rear upper part may be covered from the center upper part of the crossflow fan 71. As shown in FIG.

The upper end of the 2nd indoor heat exchanger 50b inclines toward the rear of the indoor unit 2, and is arrange | positioned in front of the 1st 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 inversely viewed from the side. It is combined to be V-shaped. The 2nd indoor heat exchanger 50b is arrange | positioned so that the front side upper part may be covered from the center upper part of the crossflow fan 71. As shown in FIG.

The third indoor heat exchanger 50c is disposed below the second indoor heat exchanger 50b 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 an obtuse angle is formed by the third indoor heat exchanger 50c and the second indoor heat exchanger 50b. Formed. The 3rd indoor heat exchanger 50c is parallel to a height direction, ie, a perpendicular direction, and is perpendicular to the lower unit 7 which covers the horizontal surface below the indoor heat exchanger 50. Moreover, the lower end of the 3rd indoor heat exchanger 50c becomes the lower end of the indoor heat exchanger 50, The lower end of the 3rd indoor heat exchanger 50c, ie, the lower end of the front side of the indoor heat exchanger 50, has a cross flow. It is located at approximately the same height as the central axis of the fan 71.

The fourth indoor heat exchanger 50d is disposed 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, and is obtuse by the fourth indoor heat exchanger 50d and the first indoor heat exchanger 50a. Is formed. The fourth indoor heat exchanger 50d is parallel to the height direction and is perpendicular to the lower unit 7 covering the horizontal surface below the indoor heat exchanger 50. In addition, the lower end of the fourth indoor heat exchanger 50d is the lower end of the rear side of the indoor heat exchanger 50, and the lower end of the fourth indoor heat exchanger 50d, that is, the lower end of the rear side of the indoor heat exchanger 50, It is located at approximately the same height as the central axis of the crossflow 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 upper and lower ends of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are the same. Located at a height. Therefore, the lower end of the front side and the lower end of the rear side of the indoor heat exchanger 50 are the same height, and are located in substantially the same height as the center axis of the crossflow fan 71. As shown in FIG. In addition, the front lower end and the rear lower end of the indoor heat exchanger 50 extend from the front and rear lower ends of the inverted V-shaped portion to a height substantially equal to the central axis of the cross flow fan 71.

The 1st indoor heat exchanger 50a, the 2nd indoor heat exchanger 50b, the 3rd indoor heat exchanger 50c, and the 4th indoor heat exchanger 50d respectively have both side ends (left-right stage as seen from the front). By being fixed to each other by the fixing plate provided in the above), they 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 the first indoor heat exchanger 50a and the second indoor heat exchanger. Each straight portion 50b has a cross-sectional shape in which a straight portion extending downward in the vertical direction is combined. The indoor heat exchanger (50) has a cross-sectional shape that is linearly symmetrical 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 (50b) In addition, the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are symmetrical back and forth. The indoor heat exchanger 50 has a cross-sectional shape including an inverted V-shape which is symmetrical back and forth as described above when viewed from the side, but when viewed from the front, the indoor heat exchanger 50 has a long shape in the horizontal direction.                 

The auxiliary pipe 51 connects the indoor heat exchanger 50 and the refrigerant pipe 4 outside the indoor unit 2 to reciprocate between the indoor heat exchanger 50 and the outdoor heat exchanger 30. Refrigerant flows. The auxiliary piping 51 is connected to the heat exchanger tube of the indoor heat exchanger 50, as shown to FIG. 4 and FIG. In addition, FIG. 6 is a top view of the right part of the indoor unit 2 without the upper casing 6. The auxiliary pipe 51 protrudes from the right side surface of the indoor heat exchanger 50 and is surrounded by a space to the right of the indoor heat exchanger 50. After the auxiliary pipe 51 protrudes from the right side surface of the indoor heat exchanger 50, it is bent toward the rear side of the indoor unit 2, and a plurality of auxiliary pipes 51 are gathered together and covered by the protective tube 53. . The auxiliary piping 51 collected together extends downward along the rear side of the indoor unit 2 and extends the space on the right side of the indoor heat exchanger 50 to the left side of the indoor unit 2 in the space below the rear side of the indoor unit 2. It is further bent toward and connected to the refrigerant pipe 4.

The auxiliary support member 52 is provided near both sides of the indoor heat exchanger 50, and as shown in FIG. 4, the indoor heat exchanger 50 is supported from the inside. Since the indoor heat exchanger unit 5 has an inverted V-shaped shape and opens downwards, the indoor heat exchanger unit 5 is connected to the lower unit 7 in which the cross flow fan 71 or the indoor fan motor 72 is mounted. It is covered from above and supported by the lower unit 7 via the auxiliary support member 52.

<Upper casing>

As shown in FIG. 3 and FIG. 5, the upper casing 6 constitutes an upper portion of the indoor unit 2. The upper casing 6 includes the upper front part 60, the upper face part 61, and the upper side face parts 62 and 63. Consists of.

The phase front part 60 covers the upper part of the front side of the indoor unit 2, and covers the front of the indoor heat exchanger 50. As shown in FIG. The upper front surface part 60 is formed in substantially flat shape, and a step is provided in a part of it. On the upper surface of this step, the front suction port 601 which consists of an slit-shaped opening in the longitudinal direction of the indoor unit 2 is provided. The front suction port 601 is provided upward of the indoor unit 2.

The upper surface portion 61 covers the upper surface of the indoor unit 2 and covers the upper side of the indoor heat exchanger 50. The upper surface portion 61 is provided with an upper surface suction port 611 composed of a plurality of slit-shaped openings. The upper surface suction port 611 is provided from the front side to the rear side of the upper surface portion 61, and has a larger suction area than the front suction port 601. For this reason, it is comprised so that air may fully be sucked in even from the upper surface rear side of the indoor unit 2.

The upper side parts 62 and 63 cover the upper part of the side surface of the indoor unit 2, and the side surface of the indoor heat exchanger 50 is covered. The upper side portions 62 and 63 have a right upper side portion 62 and a left upper side portion 63, and the right upper side portion 62 is disposed in the right side of the indoor heat exchanger 50 when viewed from the front, and the upper left portion 62 The side part 63 is arrange | positioned at the left side of the indoor heat exchanger 50.

In addition, the lower end of the upper casing 6 is formed horizontally, and the upper casing 6 is covered by the lower unit 7 so that the boundary between the upper casing 6 and the lower unit 7 becomes a horizontal line and the indoor unit. It appears in the appearance when viewed from the front and in the side of (2).

<Lower unit>

The lower unit 7 constitutes the lower part of the indoor unit 2, and as shown in FIGS. 7 and 8, the lower casing 70, the cross flow fan 71, the indoor fan motor 72, and the electrical equipment box 73 and the like are modularized.

[Lower casing]

The lower casing 70 is comprised by the lower surface part 74, the lower surface part 75, the lower side parts 76 and 77, the support part 78, etc., and is comprised by the color different from the upper casing 6. As shown in FIG. .

The charged surface portion 74 is a portion appearing in the field of view as the lower part of the front surface of the indoor unit 2 when viewed from the front, and is disposed so that the upper end thereof is inclined toward the front side of the indoor unit 2. As shown in FIG. 3A, the upper end of the charged surface part 74 is formed horizontally, and comprises the horizontal boundary line with the lower end of the upper casing 6. As shown in FIG. In addition, the charging surface portion 74 is provided with a blowout opening 741 formed of an opening along the longitudinal direction of the indoor unit 2. As shown in FIG. 5, the air outlet 741 is connected to and communicates with the internal space of the support portion 78 in which the cross flow fan 71 is housed, and the air generated by the cross flow fan 71. Ryu blows into the room through the outlet 741. Moreover, the horizontal flap 742 which guides the air which blows in into the room is provided in the blower outlet 741. This horizontal flap 742 is rotatably installed about an axis parallel to the longitudinal direction of the indoor unit 2, and is rotated by a flap motor (not shown). By being driven, the ejection opening 741 can be opened and closed.

The bottom part 75 covers the bottom face of the indoor unit 2, and is formed flat. The bottom part 75 is horizontally arrange | positioned, and the support part 78 is arrange | positioned on it.

The lower side parts 76 and 77 are a part which appears in the visual field as the lower part of the side of the indoor unit 2 when seen from the side, and covers the lower part of the side of the indoor unit 2. The lower side parts 76 and 77 have the right lower side part 76 and the left lower side part 77, and the right lower side part 76 is arrange | positioned at the right side of the indoor unit 2 from a front view, and the left lower side part ( 77 is disposed on the left side of the indoor heat exchanger 50. In addition, the upper ends of the lower surface portions 76 and 77 are formed horizontally like the lower surface portion 74. In the state where the upper casing 6 is covered by the lower unit 7, the lower end of the upper casing 6 and the upper ends of the lower surface portion 74 and the lower surface portions 76 and 77 of the lower unit 7 coincide with each other. Horizontal borders are constructed.

The support portion 78 is surrounded by the lower surface portion 74, the bottom surface portion 75, and the lower surface portions 76 and 77, and the upper surface of the support portion 78 is the lower surface portion 74 and the lower surface portion 76. , 77) is located above the top. The cross-flow fan 71, the indoor fan motor 72, the electrical equipment box 73, the indoor heat exchanger unit 5, etc. are attached to the support part 78 from the upper side, and the crossflow fan 71 and the indoor fan motor are mounted. 72, the electrical equipment box 73, the indoor heat exchanger unit 5, etc. are supported from below.

The support portion 78 supports the indoor heat exchanger 50 through the auxiliary support member 52 of the indoor heat exchanger unit 5. The upper surface of the support portion 78 is approximately the same height as the central axis of the cross flow fan. On the upper surface of the support part 78, as shown in FIG. 7, drain pans 781 and 782 and the fan accommodating part 787 are provided.

The drain pans 781, 782 are portions receiving water droplets generated on the surface of the indoor heat exchanger 50 during heat exchange, and are formed by a recessed fan-shaped member downward from the upper surface of the support portion 78. The drain fans 781 and 782 include a pre-drain fan 781 and a post-drain fan 782, and the pre-drain fan 781 has a third interior as shown in FIG. It is arrange | positioned below the heat exchanger 50c, ie, below the front lower end of the indoor heat exchanger 50. As shown in FIG. The hood drain 782 is arrange | positioned below the 4th indoor heat exchanger 50d, ie, the rear lower end of the indoor heat exchanger 50. As shown in FIG. The front drain fan 781 and the back drain fan 782 are arranged back and forth with the cross flow fan 71 interposed therebetween. The front drain fan 781 and the hood drain 782 are located at approximately the same height, and the bottom surfaces of the front drain fan 781 and the hood drain 782 are lower than the central axis height of the cross flow fan 71. Although in position, it is disposed close to the lower end of the indoor heat exchanger (50). In addition, as for the front drain fan 781 and the back drain fan 782, the bottom which receives drain water, respectively inclines a little to the right side of the indoor unit 2. As shown in FIG. And as shown in FIG. 8, the communication part 783 which connects the front drain pan 781 and the back drain pan 782 is provided in the right part of the support part 78, and this communication part 783 is provided. A water repellent hole 784 penetrating downward is provided. This water repellent hole 784 communicates with the inside of the drain hose 785 for discharging the drain water to the outside from the drain pans 781 and 782, as shown in FIG. The drain water dropped from the indoor heat exchanger 50 is received by the front drain pan 781 and the back drain pan 782, collected in the communication portion 783, and the drain hose 785 from the water repellent hole 784. It is discharged out of the cabin via).

The fan housing portion 787 is a portion in which the cross flow fan 71 and the indoor fan motor 72 are accommodated, and is provided near the center of the upper surface of the support portion 78. The fan accommodating part 787 is formed by the recessed fan member in the semicylindrical shape from the upper surface of the support part 78, and accommodates the lower half of the cross flow fan 71 and the indoor fan motor 72. As shown in FIG. Moreover, inside the support part 78, the air path which communicates the accommodated crossflow fan 71 and the blower outlet 741 is provided.

Moreover, the support part 78 has the tongue 786 which protrudes upwards from the upper surface of the support part 78 between the hood drain 778 and the crossflow fan 71. This tongue 786 covers the rear of the cross flow fan 71, and the upper end of the tongue 786 is located at a level slightly lower than the top portion of the cross flow fan 71.

In this way, the top surface of the support 78, the front drain pan 781, the hood drain 778 and the fan housing portion 787 is provided, the tongue 786 is projected upward, but the support 78 The other part of the upper surface is formed generally flat and horizontally, and is located at approximately the same height as the center line of the cross flow fan 71.

As described above, the portion at the highest position of the support 78 is tongue 786, but tongue 786 is located below the height of the top portion of the crossflow fan 71. The upper surface of the support portion 78 is located above the upper ends of the charged surface portion 74 and the lower surface portions 76 and 77. For this reason, each part of the lower casing 70 including the support part 78 is below the height of the top part of the crossflow fan 71.                 

In addition, although the back side of the upper surface of the support part 78 is also below the height of the crossflow fan 71, the part between the upper surface part 61 of the upper casing 6 and the back side of the upper surface of the support part 78 is a wall surface of the room. It is blocked by the mounting plate 8 which is mounted on it (see Fig. 5). The mounting plate 8 has the same length as the indoor heat exchanger 50 in the longitudinal direction of the indoor unit 2, and covers the back side of the indoor heat exchanger 50. The mounting plate 8 covers the rear side of the indoor unit 2 to form an air passage through which the air heat exchanged in the indoor heat exchanger 50 passes along with the upper casing 6, and in particular, the rear side air passage. To form.

[Cross flow fan]

The cross flow fan 71 is comprised in a long thin cylinder shape, and is arrange | positioned so that a center axis may become parallel in a horizontal direction. Wings are provided on the circumferential surface of the cross flow fan 71, and the air flow is generated by the cross flow fan 71 rotating around the central axis. This air flow is a flow of air which is received from the front inlet port 601 and the upper surface inlet port 611 and passes through the indoor heat exchanger 50 and blows it out of the blowout port 741 into the room. The cross flow fan 71 is located substantially in the center of the indoor unit 2 as viewed from the side. The cross flow fan 71 is supported by the support 78, and the upper half of the cross flow fan 71 in the supported state protrudes upward from the upper surface of the support 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 a diameter substantially the same as that of the cross flow fan 71. As illustrated in FIG. 8, the indoor fan motor 72 is disposed coaxially with the crossflow fan 71 on the right side of the crossflow fan 71, and the indoor fan motor 72 supports the support 78. In the state of attachment, the heights of the top portions of the indoor fan motor 72 and the cross flow fan 71 are approximately the same (see FIG. 7).

[Electric equipment box]

The electrical equipment box 73 accommodates the control board 731 for controlling the operation of the indoor unit 2, as shown to FIG. 6 and FIG. The electrical equipment box 73 has a box-shaped shape of a rectangular parallelepiped, is arrange | positioned between the lower right side 76 part of the lower casing 70, and the support part 78, and is located in the right side of the indoor heat exchanger unit 5. As shown in FIG. The electrical equipment box 73 is mounted and supported on the right side of the support 78 in the right side of the indoor fan motor 72, and the support 78 is installed before the indoor heat exchanger unit 5 is mounted to the lower unit 7. Can be mounted on Moreover, the electrical equipment box 73 is arrange | positioned near the front side, and the space behind the electrical equipment box 73 becomes a space which the auxiliary piping 51 of the indoor heat exchanger unit 5 mentioned above passes. In the electrical equipment box 73, a large-capacity component 732 such as a capacitor or a power transistor having a large capacity among the control components mounted on the control board 731 is disposed in parallel with the indoor fan motor 72 in the axial direction. As viewed from the side, the indoor fan motor 72 and the electrical equipment box 73 overlap each other. In addition, the upper surface of the electrical equipment box 73 is located in substantially the same height as the top part of the indoor fan motor 72, ie, the top part of the cross flow fan 71, in the state supported by the lower casing 70. As shown in FIG.                 

In this way, all the parts of the indoor fan motor 72, the electrical equipment box 73, and the lower casing 70 are located below the height of the top portion of the cross flow fan 71 in a state supported by the lower casing 70. The lower unit 7 has a relatively small dimension in the height direction as a whole.

〔Characteristic〕

[One]

In the indoor heat exchanger 50 included 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. From the side view, when the total length of the indoor heat exchanger 50 is the same, the case where the lengths of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are the same as that of the other case is different from the mounting angle. The maximum positional error of the end of the indoor heat exchanger 50 is reduced.

For example, consider a virtual indoor heat exchanger 500 as shown in FIG. 10B. In addition, FIG. 10A shows the indoor heat exchanger 50 with which the indoor unit 2 of the air conditioner 1 is equipped. The virtual indoor heat exchanger 500, like the indoor heat exchanger 50, is an eleventh indoor heat exchanger 500a, a twelfth indoor heat exchanger 500b, a thirteenth indoor heat exchanger 500c, and a fourteenth indoor heat exchanger. It consists of four parts of 500d. Although the structure of each indoor heat exchanger 500a, 500b, 500c, 500d is substantially the same as the indoor heat exchanger 50, the 13th indoor heat exchanger 500c which comprises the front end of the virtual indoor heat exchanger 500, and a rear end are shown. The length of the fourteenth indoor heat exchanger 500d constituting the different shape is different, and the thirteenth indoor heat exchanger 500c is long. However, the sum total of the length of the 13th indoor heat exchanger 500c and the 14th indoor heat exchanger 500d is the same as the sum total of the length of the 3rd indoor heat exchanger 50c and the 4th indoor heat exchanger 50d. Therefore, the indoor heat exchanger 50 and the virtual indoor heat exchanger 500 have the same length and have approximately the same surface area when viewed from the side.

In such an indoor heat exchanger 50 and a virtual indoor heat exchanger 500, the influence which the mounting error of each indoor heat exchanger has on the position error of the lower end of an indoor heat exchanger is considered below. The schematic diagram of the front lower end of the indoor heat exchanger 50 is shown to FIG. 11A, and the schematic diagram of the front lower end of the virtual indoor heat exchanger 500 is shown to FIG. 11B. In addition, in both drawings, in order to understand easily, each indoor heat exchanger 50b, 50c, 500b, 500c is simplified and represented by a straight line.

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 perpendicular to the vertical direction as indicated by the dashed-dotted line in the drawing. Although parallel to each other, there is actually a certain mounting angle error α. For this reason, the 3rd indoor heat exchanger 50c has comprised the angle (alpha) with respect to a perpendicular direction. Also in the virtual indoor heat exchanger 500 shown in FIG. 11B, the 13th indoor heat exchanger 500c is joined by the lower end of the 12th indoor heat exchanger 500b by the same mounting angle error (alpha). Therefore, the thirteenth indoor heat exchanger 500c also forms an angle α with respect to the vertical direction. Thus, when the indoor heat exchangers 50c and 500c are joined by the mounting angle error (alpha), the angle of the indoor heat exchangers 50c and 500c becomes larger than the ideal position shown by the dashed-dotted line in a figure as it moves away from a joining position. The part will fall off. Therefore, even if the mounting angle error (alpha) is the same, the position error (DELTA) D2 of the lower end of the long 13th indoor heat exchanger (500c) is the position error (DELTA) D1 of the lower end of the 3rd indoor heat exchanger (50c). Greater than That is, the position error (DELTA) D2 of the front lower end of the virtual indoor heat exchanger 500 becomes larger than the position error (DELTA) D1 of the front lower end of the indoor heat exchanger 50. As shown in FIG.

As described above, the longer the portion constituting the lower end of the indoor heat exchanger, the larger the position error of the lower end of the indoor heat exchanger. In other words, the shorter the portion constituting the lower end of the indoor heat exchanger, the smaller the position error of the lower end of the indoor heat exchanger. Therefore, if the sum of the lengths of the indoor heat exchangers is the same, the maximum length of the position error at the bottom is smaller than the case where the lengths of the parts constituting the front lower end and the parts constituting the rear side of the indoor heat exchanger are different. In the indoor heat exchanger 50 according to the present invention, the lengths of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are the same. For this reason, in the indoor heat exchanger 50, the mounting angle error of the 3rd indoor heat exchanger 50c and the mounting angle error of the 4th indoor heat exchanger 50d give to the position error of the lower end of the indoor heat exchanger 50. The impact is relatively diminishing. Thereby, in the indoor heat exchanger 50, the tolerance of the mounting angle of the 3rd indoor heat exchanger 50c and the tolerance of the mounting angle of the 4th indoor heat exchanger 50d are alleviated. In addition, as the tolerance of the mounting angle is alleviated, the assemblability of the indoor heat exchanger 50 is improved.

[2]

The indoor heat exchanger (50) of the indoor unit (2) of the air conditioner (1) has a front and rear view of a portion having an approximately inverted V shape and a portion having an approximately inverted V shape from the side. It is comprised by the part extended downward from a lower end, respectively. For this reason, arrangement | positioning of the indoor heat exchanger 50 which covers the front, upper part, and rear part of the crossflow fan 71 is attained easily. For this reason, the position of the indoor heat exchanger 50 becomes comparatively low, and the dimension of the height direction of the indoor unit 2 is miniaturized. In addition, since the indoor heat exchanger 50 is arranged to surround the cross flow fan 71, the efficiency of heat exchange is improved.

[3]

As mentioned above, when the indoor heat exchanger 50 is arrange | positioned so that the circumference | surroundings of the cross flow fan 71 may be performed, the distance precision with each part of the indoor heat exchanger 50, the cross flow fan 71, becomes important. For this reason, the effect of this invention that the tolerance of the mounting angle as mentioned above is alleviated is more effective.

[4]

In the indoor unit 2 of this air conditioner 1, the indoor heat exchanger 50 is formed in the shape which is symmetrical back and front. For this reason, the indoor heat exchanger 50 can be comprised combining the heat exchanger which has a common shape back and forth. Thereby, 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 may be manufactured by fins having a common shape, respectively. It is possible to reduce the cost by sharing parts. In addition, not only fins but also U-shaped heat pipes mounted on 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. Can be common Furthermore, the fixed plates provided on both sides 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 can also be common.

[5]

In the indoor unit 2 of this air conditioner 1, the indoor heat exchanger 50 is arrange | positioned so that the front, upper, and rear side of the cross flow fan 71 may be covered, and both lower ends of the indoor heat exchanger 50 may cross. It is located at approximately the same height as the central axis of the flow fan 71. Therefore, the indoor heat exchanger 50 is arrange | positioned at the comparatively low position inside the indoor unit 2. For this reason, the dimension of the height direction of the indoor unit 2 is small, and the indoor unit 2 is miniaturized.

[6]

As described above, when the lower end of the indoor heat exchanger 50 is disposed at a relatively low position, the positions of the drain pans 781 and 782 disposed below the indoor heat exchanger 50 are also lowered. The drain water received by the drain pans 781 and 782 is discharged out of the air through the water repellent hole 784 and the drain hose 785. In this case, when the height difference between the drain hose 785 and the drain pans 781 and 782 is large, the drain water can be efficiently discharged.

On the other hand, since the drain pans 781 and 782 are disposed below the lower end of the indoor heat exchanger 50, the upward movement is limited. Therefore, when the drain pans 781 and 782 are disposed at different heights, the position of one drain pan is lowered.

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

[7]

In the indoor unit 2 of this air conditioner, the indoor heat exchanger 50 is formed in the shape which is symmetrical back and front, and the lower end of back and front is the same height. From the side view, if the lower position before and after the indoor heat exchanger 50 is changed without changing the highest position and the total length of the indoor heat exchanger 50, the lower end of one side is lowered and the lower end of the other side is Increases. In this case, when the drain pans 781 and 782 are disposed close to the lower end of the indoor heat exchanger 50 before and after, the heights of the front drain pan 781 and the rear drain fan 782 are different. In addition, even when the positions of the lower ends before and after the indoor heat exchanger 50 are different, when the heights of the front drain fan 781 and the rear drain fan 782 are the same, the lower end of the lower side of the indoor heat exchanger 50 is reduced. The distance from the drain pan arrange | positioned below and the lower end of the indoor heat exchanger 50 will become large. In order for the drain pans 781 and 782 to more surely receive the drain number dropped from the lower end of the indoor heat exchanger 50, the drain pans 781 and 782 are preferably arranged close to the lower end of the indoor heat exchanger 50. Do.

In the indoor unit 2 of this air conditioner, the lower end before and behind the indoor heat exchanger 50 is the same height. For this reason, the front drain fan 781 and the hood drain 782 are arranged close to the lower end of the front and rear of the indoor heat exchanger 50, and the front drain fan 781 and the hood drain 782 are the same. It is arranged at a height. As a result, in the indoor unit 2 of the air conditioner 1, the drain pans 781 and 782 can receive the drain number more reliably, and the drain water can be efficiently discharged.

[8]

In the indoor unit 2 of this air conditioner 1, the indoor heat exchanger 50 is formed in the shape which is symmetrical back and front. For this reason, the manufacturing cost of the indoor heat exchanger 50 can be reduced by using the same component before and after the indoor heat exchanger 50. 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 can be created by fins having the same shape. . In addition, not only fins but also U-shaped heat pipes mounted on 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 are also commonized. can do. Furthermore, the fixed plates provided on both sides 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 can also be common.

[Other Examples]

[One]

In the above embodiment, the indoor heat exchanger 50 has a cross-sectional shape of approximately inverted V shape when viewed from the side, but has a cross-sectional shape of approximately V shape when viewed from the side as shown in FIG. (54) It may be OK. The indoor heat exchanger 54 is the fifth indoor heat exchanger 54a serving as the first heat exchanger and the sixth indoor heat exchanger 54b, the seventh indoor heat exchanger 54c serving as the second heat exchanger, and the third heat exchanger. It consists of the 8th indoor heat exchanger 54d which becomes. The 5th indoor heat exchanger 54a and the 6th indoor heat exchanger 54b form the part which has a V shape from a side view. The seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d form a straight portion extending upward from the front and rear ends of the portion having the V-shaped shape. The seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d have the same length.

Also in the indoor heat exchanger 54 as described above, the tolerances of the mounting angles of the seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d are alleviated similarly to the above feature (1). 54) improves the assemblability.

In addition, such a V-shaped indoor heat exchanger 54 may be arranged to rotate.

[2]

In the above embodiment, the indoor heat exchanger 50 is formed by a portion having an inverted V-shape as viewed from the side and a straight portion extending downward from the lower end before and after the portion having the inverted V-shape. Although it has a shape other than an inverted V shape, it may be sufficient. For example, it may have a circular arc shape, and may have an inverted U-shaped shape.

By using the indoor unit of the heat exchanger and 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 exchanger.

Claims (8)

In the heat exchangers 50 and 54 which the some heat exchangers 50a-50d and 54a-54d are joined, and are arrange | positioned at the indoor unit 2 of the air conditioner 1, The first heat exchanger (50a, 50b, 54a, 54b), Second heat exchangers 50c and 54c joined to one end of the first heat exchangers 50a, 50b, 54a and 54b at an angle; Third heat exchangers 50d and 54d joined to the other ends of the first heat exchangers 50a, 50b, 54a and 54b at an angle. And The second heat exchange parts 50c and 54c and the third heat exchange parts 50d and 54d have substantially the same length. Heat exchangers 50, 54. The method of claim 1, The first heat exchanger (50a, 50b) has a cross-sectional shape of approximately inverted V-shape, The second heat exchange part 50c and the third heat exchange part 50d extend downward from the front and rear lower ends of the first heat exchange parts 50a and 50b, respectively. Heat exchanger (50). The method of claim 1, It has a symmetrical shape back and forth, The second heat exchange parts 50c and 54c and the third heat exchange parts 50d and 54d are symmetrically back and forth, Heat exchangers 50, 54. The heat exchanger (50, 54) in any one of Claims 1-3, Blowing fan (71, fan) disposed to cover the heat exchanger (50, 54) The indoor unit (2) of the air conditioner (1) having a. Blower fan 71, The heat exchanger 50 of Claim 1 arrange | positioned so that the front lower part and the rear lower end may be below the height of the top part of the said blowing fan 71, covering the front, upper part, and rear part of the said blowing fan 71, A first drain pan 781 disposed below the front lower end of the heat exchanger 50, and A second drain pan 782 disposed below the rear lower end of the heat exchanger 50; A drain path 785 through which drain water discharged from the first drain pan 781 and the second drain pan 782 passes. And The first drain pan 781 and the second drain pan 782 are disposed at approximately the same height, The indoor unit 2 of the air conditioner 1. The method of claim 5, The heat exchanger 50 has a cross-sectional shape of approximately inverted V shape, The indoor unit 2 of the air conditioner 1. The method of claim 5, The front lower end of the heat exchanger 50 and the rear lower end of the heat exchanger 50 are located at approximately the same height, The indoor unit 2 of the air conditioner 1. The method according to any one of claims 5 to 7, The heat exchanger 50 has a symmetrical shape back and forth, The indoor unit 2 of the air conditioner 1.

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