CN1692252A - Indoor units for heat exchangers and air conditioners - Google Patents

Abstract

The present invention provides a heat exchanger and an indoor unit of an air conditioner that can both suppress a reduction in heat exchangeability and relax the error tolerance of the attachment angle of the heat exchange units. The indoor heat exchanger is a heat exchanger that is formed by connecting a plurality of heat exchangers disposed in the indoor unit of an air conditioner, and includes a first indoor heat exchanger, a second indoor heat exchanger, a third indoor heat exchanger and a fourth indoor heat exchanger. The third indoor heat exchanger is connected at an angle to one end of the first indoor heat exchanger and the second indoor heat exchanger. The fourth indoor heat exchanger is connected at an angle to another end of the first indoor heat exchanger and the second indoor heat exchanger. Then, the third indoor heat exchanger and the fourth indoor heat exchanger will have the same approximate height.

Description

Indoor units for heat exchangers and air conditioners

technical field

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

Background technique

A heat exchanger formed by combining a plurality of heat exchange parts at an angle to each other has been used in the past. This kind of heat exchanger can form a variety of shapes that meet the design requirements through the combination of heat exchange parts. Furthermore, the plurality of heat exchanging sections forming the heat exchanger often have various lengths (see Japanese Unexamined Patent Publication No. 2001-4162). For example, among the heat exchangers included in the indoor unit of an air conditioner, there is a heat exchanger that surrounds a blower fan in an inverted V shape. This kind of heat exchanger combines heat exchange parts of various lengths to form an inverted V shape. The heat exchange part covering the front of the air supply fan and the heat exchange part covering the upper part of the rear of the air supply fan have different lengths. .

When assembling the above-mentioned heat exchanger formed by combining a plurality of angled heat exchange parts, there is a problem of error in the installation angle of each heat exchange part. That is, in the case where there is an error in the installation angle of the heat exchanging portion, there will be an error in the position of the end of the heat exchanger, thus creating a risk of making the arrangement of the heat exchanger, etc. inappropriate. Therefore, it is hoped that the error of the installation angle of the heat exchange part is as small as possible. However, if the allowable error is too strict, the assembly performance of the heat exchanger will be reduced.

On the other hand, even if the installation angle error of the heat exchange part is the same, the position error at the end of the heat exchanger will increase due to the length of the heat exchange part. Therefore, it can be considered to reduce the allowable error of the installation angle by shortening the length of the heat exchange part.

However, if the length of the heat exchange part is shortened, the heat exchange capacity of the heat exchanger will be affected. That is, if the length of the heat exchanging portion is reduced, the total surface area of the heat exchanger that adds up the surface areas of the respective heat exchanging portions decreases, and as a result, the heat exchanging capacity of the heat exchanger decreases. Therefore, in order to reduce the allowable error of the installation angle of the heat exchange part, simply shortening the length of the heat exchange part will lead to a decrease in heat exchange capacity.

Contents of the invention

The object of the present invention is to provide a heat exchanger and an indoor unit of an air conditioner, which can reduce the allowable error of the installation angle of the heat exchanging part while preventing the heat exchanging capacity from being lowered.

The heat exchanger described in claim 1 is formed by connecting a plurality of heat exchanging parts, it is arranged in the indoor unit of the air conditioner, and has a first heat exchanging part, a second heat exchanging part and a third heat exchanging part part. The second heat exchange part is connected to one end of the first heat exchange part in an angled manner. The third heat exchange part is connected to the other end of the first heat exchange part in an angled manner. Also, the second heat exchange part has substantially the same length as the third heat exchange part.

In this heat exchanger, the second heat exchange portion has the same length as the third heat exchange portion. In the case that the total length of the heat exchanger is the same, when the length of the second heat exchange part and the third heat exchange part are the same, the maximum value of the position error of the end of the heat exchanger caused by the error of its installation angle is greater than The different lengths of the two heat exchange parts are small. That is, when the lengths of the second heat exchange portion and the third heat exchange portion are different, one is long and the other is short. In this case, the positional error of the end of the heat exchanger caused by the long heat exchange portion becomes large. On the other hand, if the total length of the heat exchanger is the same, when the length of the second heat exchange part and the third heat exchange part are the same, the length of the heat exchange part will be longer than that of the longer heat exchange part when the length is different. Short length. Therefore, this heat exchanger can reduce the allowable error of the installation angle of the heat exchanging part while preventing the reduction of the heat exchanging capacity.

In the heat exchanger described in claim 2, in the heat exchanger described in claim 1, the first heat exchange portion has a substantially inverted V-shaped cross-sectional shape. Moreover, the second heat exchange part and the third heat exchange part respectively extend downward from the front and rear lower ends of the first heat exchange part.

When the lower ends of the second heat exchange part and the third heat exchange part become the lower ends of the heat exchanger respectively, the error of the installation angle of the second heat exchange part and the third heat exchange part will affect the position error of the lower end of the heat exchanger.

However, in this heat exchanger, since the length of the second heat exchange part and the third heat exchange part are approximately the same, the maximum value of the position error of the lower end of the heat exchanger caused by the error of the installation angle is reduced. . In this way, in this heat exchanger, the allowable error in the installation angles of the second heat exchanging portion and the third heat exchanging portion can be reduced.

The heat exchanger described in claim 3 is the heat exchanger described in claim 1, which has a front-rear symmetric shape, and the second heat exchange part and the third heat exchange part are front-rear symmetric.

In this heat exchanger, since the second heat exchange part and the third heat exchange part are symmetrical front and back, the lengths of the second heat exchange part and the third heat exchange part are approximately the same. In this way, the allowable error of the installation angles of the second heat exchange part and the third heat exchange part can be reduced.

The indoor unit of the air conditioner described in claim 4 has the heat exchanger described in claim 1 or 2 or 3, and a blower fan arranged so as to be covered by the heat exchanger.

In the indoor unit of such an air conditioner, the blower fan is arranged to be covered by the heat exchanger. Therefore, in order to keep the distance between the heat exchanger and the blower fan within a predetermined value, the accuracy of the distance between the heat exchanger and the blower fan is very important. For this reason, the shape of the heat exchanger is required to have high precision. Therefore, the present invention is particularly effective for reducing the allowable error of the installation angle of the second heat exchanging portion and the third heat exchanging portion.

The indoor unit of an air conditioner according to claim 5, comprising a blower fan, a heat exchanger, a first condensed water pan, a second condensed water pan, and a condensed water passage. The heat exchanger is the heat exchanger described in claim 1, covering the front, top and rear of the blower fan, and its front lower end and rear lower end are arranged below the top height of the blower fan. The first condensed water pan is arranged below the lower end of the front side of the heat exchanger. The second condensed water pan is arranged below the lower end of the rear side of the heat exchanger. The condensed water drained from the first condensed water pan and the second condensed water pan passes through the condensed water channel. Furthermore, the first condensation water pan is arranged at approximately the same height as the second condensation water pan.

Generally, in an indoor unit of an air conditioner having a heat exchanger, since the heat exchanger functions as an evaporator during cooling, moisture in the air condenses on the surface of the heat exchanger to generate condensed water. For this reason, the indoor unit of the air conditioner generally has a condensate pan for receiving condensed water. This kind of condensate pan is usually arranged under the heat exchanger in order to receive the condensate dripping from the heat exchanger. Therefore, when the heat exchanger is arranged to cover the front and rear of the blower fan, condensed water pans are respectively arranged under the front lower end and the rear lower end of the heat exchanger. At this time, the condensed water pan on the front side and the condensed water pan on the rear side are often arranged at different heights (see JP-A-2000-74409). For example, an arrangement such that the front condensate pan is low and the rear condensate pan is high, or that the front condensate pan is high and the rear condensate pan is low.

The condensed water that drips into the condensed water pan is discharged from the outlet of the condensed water pan to the outside of the air conditioner through the condensed water channel. At this time, the greater the height difference between the position of the condensed water pan and the position of the condensed water channel, the higher the efficiency of draining condensed water.

On the other hand, from the viewpoint of reducing the height of the indoor unit, the heat exchanger is often arranged close to the blower fan, and the lower end of the heat exchanger is arranged lower than the top of the blower fan. In this way, when the position of the lower end of the heat exchanger is lowered, the position of the condensate pan is also lowered. Therefore, the height difference between the condensed water pan and the condensed water channel is reduced, and it is difficult to efficiently discharge the condensed water.

In addition, since the condensed water pan is arranged below the heat exchanger, the upward movement of the condensed water pan is restricted. Therefore, if the heights of the first condensate pan and the second condensate pan are different, the position of one condensate pan will be lowered. Thus, the height difference between the condensed water channel and the condensed water pan is reduced.

However, in the indoor unit of such an air conditioner, the first condensed water pan and the second condensed water pan arranged below the lower end of the heat exchanger are at substantially the same height. Therefore, the height of one drain pan is prevented from being lowered. Therefore, in the indoor unit of such an air conditioner, it is possible to ensure a large height difference between the condensed water channel and the condensed water pan through which the condensed water is discharged.

In the indoor unit of the air conditioner described in claim 6, in the indoor unit of the air conditioner described in claim 5, the heat exchanger has a substantially inverted V-shaped cross-sectional shape.

In such an indoor unit of an air conditioner, the heat exchanger has a substantially inverted V cross-sectional shape. Therefore, by arranging the blower fan in the space surrounded by the inverted V-shaped heat exchanger, the heat exchanger can easily cover the front, top and rear of the blower fan, and the lower end of the heat exchanger can also be easily Arranged below the top of the supply fan. Thus, the size of the indoor unit of the air conditioner can be reduced in the height direction.

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

In the indoor unit of the air conditioner described in claim 7, in the indoor unit of the air conditioner described in claim 5, the front lower end of the heat exchanger and the rear lower end of the heat exchanger are located at substantially the same height. superior.

In the indoor unit of such an air conditioner, the front lower end of the heat exchanger and the rear lower end of the heat exchanger are located at substantially the same height. Moreover, the first condensed water pan and the second condensed water pan are respectively arranged under the lower end of the front side and the lower end of the rear side of the heat exchanger. Therefore, in the indoor unit of this air conditioner, even if the first condensed water pan and the second condensed water pan are arranged at positions close to the lower end of the heat exchanger, the first condensed water pan and the second condensed water pan can be arranged at about the same height.

In the indoor unit of the air conditioner described in claim 8, in the indoor unit of the air conditioner described in claim 5, 6 or 7, the heat exchanger has a front-back symmetrical shape.

In the indoor unit of such an air conditioner, the heat exchanger has a front-rear symmetrical shape. Therefore, the heat exchanger has a shape in which the front lower end and the rear lower end are at the same height. In this way, even in the case where both the first condensed water pan and the second condensed water pan are arranged at positions close to the heat exchanger, the first condensed water pan and the second condensed water pan can be arranged at substantially the same height.

Description of drawings

Fig. 1 is the external view of air conditioner;

Fig. 2 is a structural diagram of a refrigerant circuit;

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

Fig. 3 (b) is the right side view of indoor unit;

Fig. 4 is a right side view of the indoor unit after the upper shell is removed;

Fig. 5 is a sectional view of the right side of the indoor unit;

Fig. 6 is a top view of the right part of the indoor unit after the upper shell is removed;

Figure 7 is a right side view of the lower assembly;

Figure 8 is a top view of the right side portion of the lower assembly;

Fig. 9 is a right sectional view of the lower assembly;

Figure 10 (a) is a side sectional view of the indoor heat exchanger;

Figure 10 (b) is a side sectional view of a hypothetical indoor heat exchanger;

Fig. 11(a) is an enlarged model diagram of the lower end of the front side of the indoor heat exchanger;

Fig. 11(b) is an enlarged model diagram of the lower end of the front side of the hypothetical indoor heat exchanger;

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

Detailed ways

[Overall configuration of the air conditioner]

Fig. 1 shows an external view of an air conditioner 1 according to an embodiment of the present invention.

Such an air conditioner 1 has an indoor unit 2 installed on an indoor wall or the like and an outdoor unit 3 installed outdoors.

The indoor heat exchanger 50 is accommodated in the indoor unit 2, the outdoor heat exchanger 30 is accommodated in the outdoor unit 3, and the heat exchangers 30, 50 are connected through the refrigerant pipeline 4 to form a refrigerant circuit.

[approximate structure of refrigerant circuit of air conditioner]

FIG. 2 shows the configuration of the refrigerant circuit of the air conditioner 1 . This refrigerant circuit is mainly composed of the following parts: indoor heat exchanger 50 , gas storage tank 31 , compressor 32 , four-way reversing valve 33 , outdoor heat exchanger 30 and electric expansion valve 34 .

Heat exchange is performed between the indoor heat exchanger 50 provided in the indoor unit 2 and the air in contact with it. In addition, a cross-flow fan 71 is provided in the indoor unit 2, which passes the indoor air sucked into the indoor unit through the indoor heat exchanger 50, and then discharges the heat-exchanged air into the room. The structure of this cross-flow fan 71 is an elongated cylindrical shape, and its central axis is arranged parallel to the horizontal direction. The cross-flow fan 71 is driven to rotate by an indoor fan motor 72 provided inside the indoor unit 2 . The detailed structure of the indoor unit 2 will be described below.

The outdoor unit 3 is provided with the following components: a compressor 32, a four-way reversing valve 33 connected to the exhaust side of the compressor 32, an air storage tank 31 connected to the suction side of the compressor 32, connected to the four-way The outdoor heat exchanger 30 on the reversing valve 33 is connected to the electric expansion valve 34 on the outdoor heat exchanger 30 . The electric expansion valve 34 is connected to the pipeline 41 through the filter 35 and the liquid lock valve 36 , and then connected to one end of the indoor heat exchanger 50 through the pipeline 41 . In addition, the four-way reversing valve 33 is connected to the pipeline 42 through the gas blocking valve 37 , and then connected to the other end of the indoor heat exchanger 50 through the pipeline 42 . The pipes 41 and 42 described above correspond to the refrigerant pipe 4 in FIG. 1 . In addition, the outdoor unit 3 is provided with a propeller fan 38 for exhausting air that has been heat-exchanged in the outdoor heat exchanger 30 . This propeller fan 38 is driven to rotate by an outdoor fan motor 39 .

[Structure of the 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 horizontally elongated shape when viewed from the front, and has a two-tone color divided into upper and lower parts when viewed from the front and side.

The indoor unit 2 is mainly composed of an upper casing 6 , a lower assembly 7 and an indoor heat exchanger assembly 5 accommodated inside the indoor unit 2 . The upper casing 6 covers the upper part of the indoor unit 2 . The lower assembly 7 constitutes the lower portion of the indoor unit 2 . The upper casing 6 and the lower assembly 7 are made separately, and part of the boundary line between the upper casing 6 and the lower assembly 7 is a horizontal line in the appearance of the indoor unit 2 . In addition, the upper case 6 and the lower unit 7 have different colors, and the upper case 6 and the lower unit 7 are separated by a horizontal line, which is a two-tone color with different upper and lower colors.

Next, each part constituting the indoor unit 2 will be described.

<Indoor heat exchanger components>

As shown in FIG. 4 , the indoor heat exchanger unit 5 is composed of an indoor heat exchanger 50 , auxiliary pipes 51 , auxiliary supporting members 52 and the like. In addition, FIG. 4 is a right side view of the indoor unit 2 with the upper casing 6 removed.

FIG. 5 shows a side sectional view of the indoor unit 2 .

The indoor heat exchanger 50 is installed to surround the front, top and rear of the cross-flow fan 71, by means of the rotation of the cross-flow fan 71, the air sucked from the air inlets 601, 611 passes through the cross-flow fan 71, and passes through the heat transfer tube inside. Heat exchange between refrigerants. The indoor heat exchanger 50 is divided into four parts: 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 indoor heat exchanger 50 is formed by connecting the indoor heat exchangers 50a, 50b, 50c, and 50d respectively. Viewed from the side, it has an inverted V-shaped cross-sectional shape with both ends bent downward.

Each of the indoor heat exchangers 50a, 50b, 50c, and 50d has a long plate shape in the horizontal direction. Each of the indoor heat exchangers 50a, 50b, 50c, and 50d is composed of heat transfer tubes that are repeatedly bent back and forth several times at the ends of both sides, and many rectangular cooling fins that the heat transfer tubes pass through. The heat transfer tubes are repeatedly bent back and forth on both ends of the indoor heat exchangers 50a, 50b, 50c, and 50d to form U-shaped heat transfer tubes.

The upper end of the first indoor heat exchanger 50a is inclined to the front of the indoor unit 2, and is arranged to cover the cross-flow fan 71 from above the center to above the rear side.

The upper end of the second indoor heat exchanger 50b is inclined to the rear of the indoor unit 2, and is arranged in front of the first indoor heat exchanger 50a. The upper end of the second indoor heat exchanger 50b is connected to the upper end of the first indoor heat exchanger 50a. After the first indoor heat exchanger 50a and the second indoor heat exchanger 50b are combined, they form an inverted V shape when viewed from the side. The second indoor heat exchanger 50b is arranged to cover from above the center of the cross-flow fan 71 to above the front side.

The third indoor heat exchanger 50c is arranged below the second indoor heat exchanger 50b and covers the front of the cross-flow fan 71 . The upper end of the third indoor heat exchanger 50c is connected to the lower end of the second indoor heat exchanger 50b with an angle, and the third indoor heat exchanger 50c forms an obtuse angle with the second indoor heat exchanger 50b. The third indoor heat exchanger 50c is parallel to the height direction, that is, parallel to the vertical direction, and perpendicular to the lower assembly 7 covering the horizontal plane below the indoor heat exchanger 50 . In addition, the lower end of the third indoor heat exchanger 50c is the lower end of the indoor heat exchanger 50, and the lower end of the third indoor heat exchanger 50c, that is, the lower end of the front side of the indoor heat exchanger 50, is approximately at the same height as the cross flow fan 71. The central axis is at the same height position.

The fourth indoor heat exchanger 50d is arranged below the first indoor heat exchanger 50a and covers the rear of the cross-flow fan 71 . The upper end of the fourth indoor heat exchanger 50d is connected to the lower end of the first indoor heat exchanger 50a with an angle, and the fourth indoor heat exchanger 50d forms an obtuse angle with the first indoor heat exchanger 50a. The fourth indoor heat exchanger 50d is parallel to the height direction and perpendicular to the lower assembly 7 covering the horizontal plane 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. The central axis of 71 is on the same height position.

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 located at the same height position. Therefore, the front lower end of the indoor heat exchanger 50 is at the same height as the rear lower end, and its position is slightly higher than the height of the central axis of the cross-flow fan 71 . In addition, the front lower end and the rear lower end of the indoor heat exchanger 50 extend vertically downward from the front and rear lower ends of the inverted V-shaped portion to approximately the same height as the central axis of the cross-flow fan 71 .

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 respectively arranged at the ends of both sides (when viewed from the front, the ends of the left and right directions) ) fixed plates are fixed to each other and connected as a whole to form the indoor heat exchanger 50. The indoor heat exchanger 50 has an inverted V-shaped portion formed by the first indoor heat exchanger 50a and the second indoor heat exchanger 50b, and the lower ends of the first indoor heat exchanger 50a and the second indoor heat exchanger 50b respectively The cross-sectional shape of straight line parts extending vertically downward. The indoor heat exchanger 50 has a cross-sectional shape symmetrical to a straight line passing through the apex of an inverted V shape and parallel to the vertical direction. The first indoor heat exchanger 50a, the second indoor heat exchanger 50b, and the third indoor heat exchanger Both the heat exchanger 50c and the fourth indoor heat exchanger 50d are front and rear symmetrical. The indoor heat exchanger 50 has an inverted V-shaped cross-sectional shape including the above-mentioned front-rear symmetry when viewed from the side, but has a horizontally long rectangular shape when viewed from the front.

The auxiliary pipe 51 connects the indoor heat exchanger 50 and the refrigerant pipe 4 outside the indoor unit 2 , and the refrigerant flowing back and forth flows between the indoor heat exchanger 50 and the outdoor heat exchanger 30 . As shown in FIGS. 4 and 6 , the auxiliary pipe 51 is connected to the heat transfer pipe of the indoor heat exchanger 50 . In addition, FIG. 6 is a plan view of the right side part of the indoor unit 2 after the upper casing 6 is removed. The auxiliary pipe 51 protrudes from the right side of the indoor heat exchanger 50 and is enclosed in the space on the right side of the indoor heat exchanger 50 . The auxiliary pipes 51 protrude from the right side of the indoor heat exchanger 50 and then bend toward the back side of the indoor unit 2 . The assembled auxiliary pipes 51 extend downward along the back of the indoor unit 2 in the space on the right side of the indoor heat exchanger 50, and bend toward the left side of the indoor unit 2 in the space at the lower rear side of the indoor unit 2. , connected to the refrigerant pipe 4.

As shown in FIG. 4 , the auxiliary support member 52 is provided near both side surfaces of the indoor heat exchanger 50 and supports the indoor heat exchanger 50 from the inside. Since the indoor heat exchanger assembly 5 is in the shape of an inverted V and is open below, it covers the lower assembly 7 in the state where the cross-flow fan 71 and the indoor fan motor 72 are installed from above, and is supported by the auxiliary supporting member 52. lower assembly7.

<Upper shell>

As shown in FIGS. 3 and 5 , the upper housing 6 constitutes the upper portion of the indoor unit 2 and is composed of an upper front portion 60 , a top portion 61 and upper side portions 62 , 63 .

The upper front part 60 covers the upper front side of the indoor unit 2 and covers the front of the indoor heat exchanger 50 . The upper front portion 60 has a substantially flat shape, and a step is provided on a part thereof. On the upper surface of the step, a front air intake port 601 constituted by a long slit-shaped opening along the longitudinal direction of the indoor unit 2 is provided. The front air inlet 601 is provided facing upward of the indoor unit 2 .

The top surface portion 61 covers the top surface of the indoor unit 2 and covers the top of the indoor heat exchanger 50 . The top surface suction port 611 which consists of many slit-shaped openings is provided in the top surface part 61. As shown in FIG. Top suction ports 611 are provided from the front to the rear of the top portion 61 . Its suction area is larger than the suction area of the front suction port 601. Therefore, air can be sufficiently sucked in from the rear side of the top surface of the indoor unit 2 .

The upper side parts 62 and 63 cover the upper side of the indoor unit 2 and cover the side of the indoor heat exchanger 50 . There are upper right side part 62 and upper left side part 63 among the upper side parts 62, 63. Viewed from the front, the upper right side part 62 is arranged on the right side of the indoor heat exchanger 50, and the upper left side part 63 is arranged on the right side of the indoor heat exchanger 50. on the left side.

In addition, the lower end of the upper casing 6 is horizontal. Since the upper casing 6 covers the lower assembly 7, the boundary line between the upper casing 6 and the lower assembly 7 is a horizontal line. When viewed from the front and side of the indoor unit 2, it is It can be shown in appearance.

<Lower component>

As shown in Figures 7 and 8, the lower assembly 7 constitutes the bottom of the indoor unit 2, and it is formed by modularizing the lower shell 70, the cross-flow fan 71, the indoor fan motor 72, and the electrical equipment box 73.

[lower shell]

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

The lower front portion 74 is a portion that appears in view as the lower front portion of the indoor unit 2 when viewed from the front, and its upper end is arranged to be inclined toward the front side of the indoor unit 2 . As shown in FIG. 3( a ), the upper end of the lower front portion 74 is horizontal, forming a horizontal boundary with the lower end of the upper housing 6 . In addition, an exhaust port 741 formed by opening along the lengthwise direction of the indoor unit 2 is also provided on the lower front portion 74 . As shown in FIG. 5 , the exhaust port 741 communicates with the inner space of the support portion 78 for accommodating the cross-flow fan 71 , and the airflow generated by the cross-flow fan 71 is exhausted into the room through the exhaust port 741 . In addition, the air outlet 741 is also provided with a horizontal baffle 742 for guiding the air discharged into the room. The horizontal baffle 742 is designed to freely rotate around the axis of the indoor unit 2 parallel to the longitudinal direction, and is driven to rotate by a baffle motor (not shown in the figure), so as to switch the exhaust port 741 .

The bottom surface portion 75 covers the bottom surface of the indoor unit 2 and has a flat shape. The bottom surface portion 75 is arranged in the horizontal direction, on which the support portion 78 is arranged.

The lower side portions 76, 77 are portions that appear in view as the lower side portions of the indoor unit 2 when viewed from the side, and cover the lower side portions of the indoor unit 2. As shown in FIG. Among the lower side parts 76 and 77, there are right lower side part 76 and left lower side part 77. The right lower side part 76 is arranged on the right side of the indoor unit 2 when viewed from the front, and the left lower side part 77 is arranged on the left side of the indoor heat exchanger 50. side. In addition, the upper ends of the lower side portions 76, 77 have a horizontal shape like the lower front portion 74. As shown in FIG. In the state where the upper casing 6 covers the lower assembly 7, the lower end of the upper casing 6 closely cooperates with the lower front portion 74 of the lower assembly 7 and the upper ends of the lower side portions 76, 77 to form a horizontal boundary.

The support portion 78 is surrounded by the lower front portion 74 , the bottom portion 75 , and the lower side portions 76 , 77 . The upper surface of the support portion 78 is located above the upper ends of the lower front portion 74 and the lower side portions 76 , 77 . In the supporting part 78, the cross-flow fan 71, the indoor fan motor 72, the electrical equipment box 73, the indoor heat exchanger assembly 5, etc. are installed from above, and the cross-flow fan 71, the indoor fan motor 72, and the electrical equipment are supported from below. Box 73, indoor heat exchanger assembly 5, etc.

The support portion 78 supports the indoor heat exchanger 50 via the auxiliary support member 52 of the indoor heat exchanger assembly 5 . The height above the support portion 78 is approximately the same as the height of the central axis of the cross-flow fan. As shown in FIG. 7 , condensate pans 781 , 782 and a fan accommodating portion 787 are provided on the support portion 78 .

The condensed water pans 781 and 782 are portions for receiving water droplets generated on the surface of the indoor heat exchanger 50 during heat exchange, and are formed of concave members recessed downward from the upper surface of the supporting portion 78 . The condensed water pans 781 and 782 include a front condensed water pan 781 and a rear condensed water pan 782 . As shown in FIG. 5 , the front condensed water pan 781 is arranged below the third indoor heat exchanger 50 c , that is, below the front lower end of the indoor heat exchanger 50 . The rear condensed water pan 782 is arranged at the fourth indoor heat exchanger 50d, that is, below the lower end of the rear side of the indoor heat exchanger 50 . The front condensate pan 781 and the rear condensate pan 782 are arranged to sandwich the cross flow fan 71 in the front-rear direction. The front condensed water pan 781 and the rear condensed water pan 782 are at approximately the same height position, the height of the bottom surface of the front condensed water pan 781 and the rear condensed water pan 782 is lower than the height of the central axis of the cross-flow fan 71, and they are arranged close to the indoor fan. The lower end of the heater 50. In addition, the bottom surfaces of the front condensed water pan 781 and the rear condensed water pan 782 respectively receiving condensed water are slightly inclined to the right side of the indoor unit 2 . Moreover, as shown in FIG. 8 , on the right side part of the support portion 78 , there is a communicating portion 783 that communicates the front condensed water pan 781 and the rear condensed water pan 782 . Go to the water hole 784. As shown in FIG. 9, this suction hole 784 communicates with the inside of a drain hose 785 for draining condensed water from the condensed water pans 781, 782 to the outside. The condensed water dripping from the indoor heat exchanger 50 is received by the front condensed water pan 781 and the rear condensed water pan 782, collected in the connecting portion 783, and then discharged from the water pump hole 784 to the outside of the indoor unit through the drain hose 785.

The fan accommodating portion 787 is a portion accommodating the cross-flow fan 71 and the indoor fan motor 72 , and is provided near the center on the upper surface of the supporting portion 78 . The fan accommodating portion 787 is formed by a semi-cylindrical part recessed downward from the support portion 78 , and accommodates the cross-flow fan 71 and the lower half of the indoor fan motor 72 . In addition, inside the supporting portion 78, an air passage connecting the accommodated cross-flow fan 71 and the exhaust port 741 is also provided.

In addition, the support portion 78 has a tongue portion 786 protruding 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 height of the upper end of the tongue 786 is lower than the top of the cross-flow fan 71 .

Thus, on the upper surface of the support portion 78, a front condensate pan 781, a rear condensate pan 782, and a fan accommodating portion 787 are provided. Although the tongue portion 786 protrudes upwards, other parts above the support portion 78 are generally flat and horizontal, and the position on the height is approximately the same as the height of the center line of the cross-flow fan 71 .

As mentioned above, although a part on the uppermost position of the supporting portion 78 is the tongue portion 786, the height of the entire tongue portion 786 is below the height of the top of the cross flow fan 71. In addition, the upper side of the support portion 78 is located above the upper ends of the lower front portion 74 and the lower side portions 76 , 77 . Therefore, each portion of the lower housing 70 including the supporting portion 78 is below the level of the top of the cross flow fan 71 .

In addition, although the back side on the support portion 78 is also below the height of the cross-flow fan 71, the part between the top surface portion 61 of the upper casing 6 and the back surface above the support portion 78 is installed on the indoor wall. The upper fixed plate 8 is blocked (see Figure 5). The fixing 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 . Since the fixing plate 8 has covered the back side of the indoor unit 2, it together with the upper shell 6 forms an air channel through which the air that performs heat exchange in the indoor heat exchanger 50 passes, especially the back side. air channel.

[Cross-flow fan]

The cross-flow fan 71 has an elongated cylindrical shape, and its central axis is arranged parallel to the horizontal direction. Blades are provided on the circumferential surface of the cross-flow fan 71, and when the cross-flow fan 71 rotates around the central axis, air flow is generated. This airflow is sucked in from the front air inlet 601 and the top surface air inlet 611 , passes through the indoor heat exchanger 50 , and is discharged into the room through the exhaust port 741 . The position of the cross-flow fan 71 is approximately at the center of the indoor unit 2 when viewed from the side. The cross-flow fan 71 is supported by the supporting portion 78 , and the upper half of the cross-flow fan 71 in the supported state protrudes upward from the upper surface of the supporting 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 thinner cylindrical shape having approximately the same diameter as the cross-flow fan 71 . As shown in Figure 8, the indoor fan motor 72 is arranged on the right side of the cross-flow fan 71, coaxial with the cross-flow fan 71, under the state that the indoor fan motor 72 is installed on the supporting part 78, the indoor fan motor 72 and the cross-flow fan 71 The heights of the tops are approximately the same (see Figure 7).

[Electrical Equipment Box]

As shown in FIGS. 6 and 8 , the electrical equipment box 73 accommodates a control board 731 for controlling the operating state of the indoor unit 2 . The electrical equipment box 73 is in the shape of a cuboid, arranged between the lower right side part 76 and the supporting part 78 of the lower casing 70 , and located on the right side of the indoor heat exchanger assembly 5 . The electrical equipment box 73 is installed and supported on the right side of the supporting part 78 on the right side of the indoor fan motor 72, and can be installed on the supporting part 78 before the indoor heat exchanger assembly 5 is installed on the lower assembly 7. Furthermore, by arranging the electrical equipment box 73 closer to the front side, the space behind the electrical equipment box 73 becomes the space through which the auxiliary pipe 51 of the above-mentioned indoor heat exchanger unit 5 passes. The electrical equipment box 73 is installed on the control board 731, and the high-capacity capacitors and power transistors and other strong electric parts 732 among the control parts are arranged on the position along the axial direction with the indoor fan motor 72. When viewed from the side , the indoor fan motor 72 and the electrical equipment box 73 are arranged overlappingly. In addition, when the electrical equipment box 73 is supported on the lower casing 70, its upper surface is located at substantially the same height as the top of the indoor fan motor 72, that is, the top of the cross flow fan 71.

Like this, the positions of all parts of the indoor fan motor 72, the electrical equipment box 73, and the lower casing 70 are all below the height of the top of the cross-flow fan 71 under the state of being supported on the lower casing 70. direction has a shape with a relatively small size.

[Features]

[1] 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. When viewed from the side, in the case where the total lengths of the indoor heat exchangers 50 are the same, compared with the case where the lengths of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are different, it is caused by an error in the installation angle. The maximum value of the end position error of the indoor heat exchanger 50 is reduced.

For example, consider a hypothetical indoor heat exchanger 500 as shown in FIG. 10(b). In addition, FIG. 10( a ) shows an indoor heat exchanger 50 included in the indoor unit 2 of one air conditioner 1 . The hypothetical indoor heat exchanger 500 is the same as the indoor heat exchanger 50, consisting of an eleventh indoor heat exchanger 500a, a twelfth indoor heat exchanger 500b, a thirteenth indoor heat exchanger 500c and a fourteenth indoor heat exchanger 500d consists of four parts. The configurations of the indoor heat exchangers 500a, 500b, 500c, and 500d are substantially the same as those of the indoor heat exchanger 50, but the thirteenth indoor heat exchanger 500c constituting the front end of the virtual indoor heat exchanger 500 has the same configuration as the virtual indoor heat exchanger 500c. The fourteenth indoor heat exchanger 500d at the rear end of the heat exchanger 500 has different lengths, and the thirteenth indoor heat exchanger 500c has a longer length. However, the total length of the thirteenth indoor heat exchanger 500c and the fourteenth indoor heat exchanger 500d is the same as the total length of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d. Therefore, the indoor heat exchanger 50 has the same length and substantially the same surface area as the virtual indoor heat exchanger 500 when viewed from the side.

In this indoor heat exchanger 50 and the hypothetical indoor heat exchanger 500, the influence of the installation error of each indoor heat exchanger on the position error of the lower end of the indoor heat exchanger was investigated, and the results are as follows. FIG. 11( a ) is a schematic diagram of the lower front end of the indoor heat exchanger 50 , and FIG. 11( b ) is a schematic diagram of the lower front end of the virtual indoor heat exchanger 500 . In addition, for ease of understanding, the respective indoor heat exchangers 50b, 50c, 500b, and 500c are simplified in these two figures, and these indoor heat exchangers are represented by straight lines.

When the third indoor heat exchanger 50c is connected to the lower end of the second indoor heat exchanger 50b at a completely correct angle, the third indoor heat exchanger 50c should be parallel to the vertical direction as indicated by an imaginary line in the figure, but, Actually, a certain degree of installation angle error α is generated. Therefore, the third indoor heat exchanger 50c forms an angle α with respect to the vertical direction. In the virtual indoor heat exchanger 500 shown in FIG. 11( b ), the thirteenth indoor heat exchanger 500c is also connected to the lower end of the twelfth indoor heat exchanger 500b with the same installation angle error α. Therefore, the thirteenth indoor heat exchanger 500c also forms an angle α with respect to the vertical direction. In this way, when the indoor heat exchangers 50c and 500c are connected with the installation angle error α, the farther away from the connection position, the distance that each part of the indoor heat exchangers 50c and 500c are separated from the ideal position indicated by the imaginary line in the figure bigger. Therefore, even if the installation angle error α is the same, the position error ΔD2 of the lower end of the longer thirteenth indoor heat exchanger 500c is larger than the position error ΔD1 of the lower end of the third indoor heat exchanger 50c. That is, the positional error ΔD2 of the virtual lower end of the front side of the indoor heat exchanger 500 is larger than the positional error ΔD1 of the lower end of the front side of the indoor heat exchanger 50 .

As described above, the longer the portion constituting the lower end of the indoor heat exchanger, the larger the positional error of the lower end of the indoor heat exchanger. Conversely, the shorter the portion constituting the lower end of the indoor heat exchanger, the smaller the positional error of the lower end of the indoor heat exchanger. Therefore, if the total lengths of the lower ends of the indoor heat exchangers are the same, the maximum value of the lower end position error can be reduced compared to the case where the lengths of the respective parts are different. Therefore, in the indoor heat exchanger 50 used in the present invention, the lengths of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are the same. In this way, in the indoor heat exchanger 50, the installation angle error of the third indoor heat exchanger 50c and the installation angle error of the fourth indoor heat exchanger 50d have relatively little influence on the position error of the lower end of the indoor heat exchanger 50. Therefore, in the indoor heat exchanger 50, the allowable error of the installation angle of the third indoor heat exchanger 50c and the allowable error of the installation angle of the fourth indoor heat exchanger 50d can be relaxed. In addition, since the tolerance of the installation angle is relaxed, the assembly performance of the indoor heat exchanger 50 is improved.

[2] The indoor heat exchanger 50 equipped in the indoor unit 2 of the air conditioner 1 has a substantially inverted V-shaped portion viewed from the side, and lower ends front and rear from the substantially inverted V-shaped portion. It is composed of the parts extending downward respectively. Therefore, the indoor heat exchanger 50 can be conveniently arranged to cover the front, top and rear of the cross-flow fan 71 . Therefore, the position of the indoor heat exchanger 50 is relatively low, and the dimension in the height direction of the indoor unit 2 is also reduced. 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 described above, in the case where the indoor heat exchanger 50 is arranged to surround the cross-flow fan 71 , the accuracy of the distance between each part of the indoor heat exchanger 50 and the cross-flow fan 71 is important. For this reason, the effect of the present invention can be more effectively exerted by relaxing the allowable error of the installation angle as mentioned above.

[4] In the indoor unit 2 of the air conditioner 1, the indoor heat exchanger 50 has a front-rear symmetrical shape. Therefore, the indoor heat exchanger 50 can be configured by combining heat exchangers having the same shape at the front and rear. Thus, 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, can be manufactured with fins of the same shape respectively, so as to pass Generalization of parts to reduce costs. In addition, not only the cooling fins, but also the U-shaped heat transfer tubes installed on the 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 be generalized. Furthermore, the fixing 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 used in common.

[5] In the indoor unit 2 of this air conditioner 1, the indoor heat exchanger 50 is arranged to cover the front, top and rear of the cross-flow fan 71, and the two lower ends of the indoor heat exchanger 50 are positioned approximately at At the same height as the central axis of the cross-flow fan 71 . Therefore, the indoor heat exchanger 50 is arranged at a relatively low position inside the indoor unit 2 . In this way, the size of the indoor unit 2 in the height direction is reduced, enabling the indoor unit 2 to be miniaturized.

[6] As described above, when the lower end of the indoor heat exchanger 50 is arranged at a relatively low position, the positions of the condensed water pans 781, 782 arranged below the indoor heat exchanger 50 are also lowered. The condensed water collected in the condensed water pans 781 and 782 is discharged out of the machine through the suction hole 784 and the drain hose 785 . In this case, if the height difference between the drain hose 785 and the condensed water pans 781 and 782 is increased, the condensed water can be efficiently drained.

On the other hand, since the condensed water pans 781, 782 are arranged below the lower end of the indoor heat exchanger 50, upward movement is restricted. Therefore, when the condensed water pans 781, 782 are arranged at different heights, the position of one condensed water pan is lowered.

However, in the indoor unit 2 of this air conditioner 1, the condensed water pans 781, 782 are arranged at the same height. Therefore, it is possible to ensure that the height difference between the drain hose 785 and the condensed water pans 781 and 782 is as large as possible. In this way, the condensed water can be efficiently discharged.

[7] In the indoor unit 2 of this type of air conditioner, the indoor heat exchanger 50 has a front-rear symmetrical shape, and the front and rear lower ends are at the same height. Viewed from the side, without changing the highest position and total length of the indoor heat exchanger 50, but making the positions of the front and rear lower ends of the indoor heat exchanger 50 different, the lower end of one side is low, and the other side is lower. The lower end is high. In this case, when the condensed water pans 781, 782 are arranged near the front and rear lower ends of the indoor heat exchanger 50, the front condensed water pan 781 and the rear condensed water pan 782 are arranged at different heights. In addition, even if the positions of the front and rear lower ends of the indoor heat exchanger 50 are different, if the heights of the front condensed water pan 781 and the rear condensed water pan 782 are the same, they are placed at the lower end of the indoor heat exchanger 50. The condensed water pan of the below, just leaves far away with the distance of indoor heat exchanger 50 lower ends. In order to reliably receive the condensed water dripping from the lower end of the indoor heat exchanger 50 with the condensed water pans 781, 782, it is desirable to arrange the condensed water pans 781, 782 near the lower end of the indoor heat exchanger 50.

In the indoor unit 2 of this air conditioner, the front and rear lower ends of the indoor heat exchanger 50 are at the same height. Therefore, while the front condensed water pan 781 and the rear condensed water pan 782 are respectively arranged close to the front and rear lower ends of the indoor heat exchanger 50, the front condensed water pan 781 and the rear condensed water pan 782 can be arranged on the same height. In this way, in the indoor unit 2 of the air conditioner 1, the condensed water pans 781 and 782 can reliably receive the condensed water and efficiently discharge the condensed water.

[8] In the indoor unit 2 of the air conditioner 1, the indoor heat exchanger 50 has a front-rear symmetrical shape. 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. 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 manufactured with fins of the same shape. In addition, not only the cooling fins, but also the U-shaped heat transfer tubes installed on the 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 be generalized. Furthermore, the fixing 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 used in common.

[Other examples]

[1] In the above embodiment, the indoor heat exchanger 50 has a substantially inverted V-shaped cross-sectional shape when viewed from the side, but it may also be a V-shaped cross-sectional shape as shown in FIG. 12 . The indoor heat exchanger 54 of a zigzag cross-sectional shape. Such indoor heat exchangers 54 are constituted by 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. The fifth indoor heat exchanger 54a and the sixth indoor heat exchanger 54b form a V-shaped portion viewed from the side. 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 V-shaped portion. Furthermore, the seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d have the same length.

In this way, in the indoor heat exchanger 54, the same as the above-mentioned feature (1), the allowable error of the installation angle of the seventh indoor heat exchanger 54c and the eighth indoor heat exchanger 54d can be relaxed, and the performance of the indoor heat exchanger 54 is improved. Assembly performance.

In addition, this V-shaped indoor heat exchanger 54 can also be arranged to be able to rotate and move.

[2] In the above embodiment, the indoor heat exchanger 50 is composed of an inverted V-shaped part viewed from the side, and a straight line extending downward from the front and rear lower ends of the inverted V-shaped part. However, A portion having a shape other than an inverted V shape is also possible. For example, it may be an arc-shaped portion or an inverted U-shaped portion.

Utilizing the heat exchanger and the indoor unit of the air conditioner of the present invention prevents the reduction of the heat exchanging capacity and at the same time can relax the allowable error of the installation angle of the heat exchanging part.

Claims (8)

1. a heat exchanger (50,54), it is formed by connecting by a plurality of heat exchanging part (50a-50d, 54a-54d), is arranged in the indoor set (2) of air conditioner (1), it is characterized in that it has following each several part:

First heat exchanging part (50a, 50b, 54a, 54b);

Be connected second heat exchanging part (50c, 54c) of above-mentioned first heat exchanging part (50a, 50b, 54a, a 54b) end in angled mode;

Be connected the 3rd heat exchanging part (50d, 54d) of above-mentioned first heat exchanging part (50a, 50b, 54a, the 54b) other end in angled mode; And,

Above-mentioned second heat exchanging part (50c, 54c) and above-mentioned the 3rd heat exchanging part (50d, 54d) have roughly the same length.

2. heat exchanger as claimed in claim 1 (50) is characterized in that,

Above-mentioned first heat exchanging part (50a, 50b) has the section configuration that roughly is inverted v-shaped;

Above-mentioned second heat exchanging part (50c) and above-mentioned the 3rd heat exchanging part (50d) are extended from the lower ends downward side of above-mentioned first heat exchanging part (50a, 50b) front and back respectively.

3. heat exchanger as claimed in claim 1 or 2 (50,54) is characterized in that,

The shape of symmetry before and after it has;

Above-mentioned second heat exchanging part (50c, 54c) and above-mentioned the 3rd heat exchanging part (50d, 54d) front and back symmetry.

4. the indoor set (2) of an air conditioner (1) is characterized in that it has following parts:

As claim 1 or 2 or 3 described heat exchangers (50,54); And

Be arranged to Air Blast fan (71) by above-mentioned heat exchanger (50,54) covering.

5. the indoor set (2) of an air conditioner (1) is characterized in that it has following parts:

Air Blast fan (71);

Heat exchanger as claimed in claim 1 (50), it is arranged to cover the place ahead, top and the rear of above-mentioned Air Blast fan (71), and the height of its lower end, front side and rear side lower end is lower than the height on top, above-mentioned Air Blast fan (71) top;

Be arranged in first condense water disk (781) of the below of above-mentioned heat exchanger (50) lower end, front side;

Be arranged in second condense water disk (782) of the below of above-mentioned heat exchanger (50) rear side lower end; And,

The condensation water channel (785) that allows the condensed water of discharging pass through from above-mentioned first condense water disk (781) and above-mentioned second condense water disk (782); And,

Above-mentioned first condense water disk (781) and above-mentioned second condense water disk (782) are arranged on the roughly the same height.

6. the indoor set (2) of air conditioner as claimed in claim 5 (1) is characterized in that,

Above-mentioned heat exchanger (50) roughly has the section configuration of inverted v-shaped.

7. as the indoor set (2) of claim 5 or 6 described air conditioners (1), it is characterized in that,

The rear side lower end of the lower end, front side of above-mentioned heat exchanger (50) and above-mentioned heat exchanger (50) is positioned on the roughly the same height.

8. as the indoor set (2) of claim 5 or 6 or 7 described air conditioners (1), it is characterized in that the shape of symmetry before and after above-mentioned heat exchanger (50) has.

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