CN111837003A

CN111837003A - Indoor unit of air conditioner

Info

Publication number: CN111837003A
Application number: CN201880090995.1A
Authority: CN
Inventors: 远原晃一; 井崎智伸; 佐藤浩介; 大石圭介
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2018-03-20
Filing date: 2018-03-20
Publication date: 2020-10-27
Also published as: EP3770526B1; EP3770526A4; JPWO2019180818A1; US20200400320A1; EP3770526A1; WO2019180818A1

Abstract

An object of the present invention is to provide an indoor unit of an air conditioner including a first heat exchanger and a second heat exchanger, which can suppress dew emission more than before even when the degree of water repellency of the first heat exchanger is increased. An indoor unit of an air conditioner according to the present invention includes: a first heat exchanger inclined downward toward the front; a second heat exchanger provided below the first heat exchanger; a drain pan provided below the second heat exchanger; and a sealing member that covers a space between the first heat exchanger and the second heat exchanger and a part of the first heat exchanger from a front side, wherein the first heat exchanger has at least one heat exchange portion, and an upper end of the sealing member is higher than a front end of a lower end of the heat exchange portion disposed at the foremost side.

Description

Indoor unit of air conditioner

Technical Field

The present invention relates to an indoor unit of an air conditioner for preventing dew from flying out.

Background

An indoor unit of an air conditioner includes an indoor heat exchanger in a casing. Such indoor heat exchangers of various structures have been proposed from the viewpoint of layout in the casing and the like. For example, as a conventional indoor heat exchanger, an indoor heat exchanger including a first heat exchanger disposed above a fan and a second heat exchanger disposed in front of the fan is known (see patent document 1). Specifically, the first heat exchanger is provided obliquely upward in the front direction of the fan and is inclined downward toward the front. The second heat exchanger is provided in front of the fan and below the first heat exchanger. In addition, in the indoor unit described in patent document 1, a seal member is further provided to cover a space between the first heat exchanger and the second heat exchanger and a part of the second heat exchanger from the front side. The sealing member of the indoor unit described in patent document 1 adjusts the air volume of the second heat exchanger.

Patent document 1 Japanese laid-open patent publication No. 2005-214561

When the indoor heat exchanger functions as an evaporator, the indoor air drawn into the casing by the fan is cooled by the refrigerant flowing through the indoor heat exchanger. At this time, moisture in the indoor air condenses on the indoor heat exchanger, and dew water adheres to the indoor heat exchanger. In an indoor unit in which an indoor heat exchanger including a first heat exchanger and a second heat exchanger as described above is mounted, dew water adhering to the first heat exchanger generally flows down along the first heat exchanger, reaches the second heat exchanger, and adheres to the second heat exchanger. Then, the dew water attached to the second heat exchanger flows down along the second heat exchanger and is discharged to a drain pan disposed below the second heat exchanger. The dew water discharged to the drain pan is discharged to the outside of the room through a pipe or the like.

Here, for example, environmental factors such as a spray having a water repellent function, such as a hair spray, are used in a large amount in a room where the indoor unit is installed, and thus the degree of water repellency of the indoor heat exchanger may increase. In this case, in the conventional indoor unit in which the indoor heat exchanger including the first heat exchanger and the second heat exchanger as described above is mounted, the degree of water repellency of the first heat exchanger increases, and the speed of dew-water falling down along the first heat exchanger increases. Therefore, dew falling down along the first heat exchanger cannot reach the second heat exchanger but flies out to the front of the second heat exchanger. Then, the dew water flying out to the front of the second heat exchanger cannot be caught by the drain pan. Therefore, in the conventional indoor unit including the first heat exchanger and the second heat exchanger as described above, dew water that flies out to the front of the second heat exchanger flies out into the room, and a problem arises in that so-called dew water flies out.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an indoor unit of an air conditioner including the first heat exchanger and the second heat exchanger as described above, which can suppress the dew emission more than before even when the degree of water repellency of the first heat exchanger is increased.

An indoor unit of an air conditioner according to the present invention includes: a first heat exchanger inclined downward toward the front; a second heat exchanger provided below the first heat exchanger; a drain pan provided below the second heat exchanger; and a sealing member that covers a space between the first heat exchanger and the second heat exchanger and a part of the first heat exchanger from a front side, wherein the first heat exchanger has at least one heat exchange portion, and an upper end of the sealing member is higher than a front end of a lower end of the heat exchange portion disposed at the foremost side.

In the indoor unit of an air conditioner according to the present invention, even if the degree of water repellency of the first heat exchanger increases and dew-water falling down along the first heat exchanger tends to fly forward of the second heat exchanger, dew-water that tends to fly forward of the second heat exchanger collides with the blocking member. Then, the dew-water colliding against the closing member flows down along the closing member to reach the second heat exchanger, and adheres to the second heat exchanger. Then, the dew water attached to the second heat exchanger flows down along the second heat exchanger and is discharged to a drain pan disposed below the second heat exchanger. Therefore, in the indoor unit of an air conditioner according to the present invention, dew condensation can be suppressed from flying out more than before even when the degree of water repellency of the first heat exchanger is increased.

Drawings

Fig. 1 is a perspective view of an indoor unit of an air conditioner according to embodiment 1 of the present invention, as viewed from the front.

Fig. 2 is a perspective view of an indoor unit of an air conditioner according to embodiment 1 of the present invention viewed from the front, and is a view showing a state in which a front portion of a casing is removed.

Fig. 3 is a side view of the internal structure of an indoor unit of an air conditioner according to embodiment 1 of the present invention.

Fig. 4 is a perspective view of a closing member of an indoor unit of an air conditioner according to embodiment 1 of the present invention, as viewed from the front.

Fig. 5 is a perspective view of a sealing member of an indoor unit of an air conditioner according to embodiment 1 of the present invention, as viewed from the back side.

Fig. 6 is a view showing a state in which a closing member is fixed to an indoor heat exchanger in an indoor unit of an air conditioner according to embodiment 1 of the present invention, and is a perspective view of the vicinity of a first claw portion of the closing member as viewed from the front side.

Fig. 7 is a diagram showing a state in which a closing member is fixed to an indoor heat exchanger in an indoor unit of an air conditioner according to embodiment 1 of the present invention, and is a diagram showing a vicinity of a second claw portion of the closing member as viewed from a side.

Fig. 8 is a diagram for explaining a dew-water discharging operation in an indoor unit of an air conditioner including a conventional sealing member.

Fig. 9 is a diagram for explaining a dew-water discharging operation in the indoor unit of the air conditioner according to embodiment 1 of the present invention.

Fig. 10 is a side view of the internal structure of an indoor unit of an air conditioner according to embodiment 2 of the present invention.

Detailed Description

In the following, in each embodiment, an example of an indoor unit of an air conditioner according to the present invention will be described. In the following, an example of an indoor unit of an air conditioner according to the present invention will be described by taking a wall-mounted indoor unit mounted on a wall of a room as an air-conditioning target space as an example.

Embodiment mode 1

Fig. 1 is a perspective view of an indoor unit of an air conditioner according to embodiment 1 of the present invention, as viewed from the front. Fig. 2 is a perspective view of an indoor unit of an air conditioner according to embodiment 1 of the present invention viewed from the front, and is a view showing a state in which a front portion of a casing is removed. Fig. 3 is a side view of the internal structure of an indoor unit of an air conditioner according to embodiment 1 of the present invention. In fig. 3, the left side of the drawing is the front side of the indoor unit 100.

An indoor unit 100 of an air conditioner includes, for example, a substantially rectangular parallelepiped casing 1. A suction port 2 is formed in an upper surface portion of the casing 1. A discharge port 3 is formed in a lower portion of the front surface portion of the housing 1. Further, a fan 4, an indoor heat exchanger 5, and the like are housed inside the casing 1.

In embodiment 1, a cross flow fan is used as the fan 4. The fan 4 is surrounded by a housing 6. The housing 6 has an opening portion provided from the front to the upper portion and an opening portion provided at the lower portion. The opening at the lower part of the housing 6 communicates with the discharge port 3. When the fan 4 rotates, indoor air is sucked into the casing 1 through the suction port 2. The indoor air sucked into the casing 1 is sucked into the casing 6 through an opening provided from the front to the upper part of the casing 6. The indoor air sucked into the casing 6 passes through the opening of the lower part of the casing 6 and is discharged from the discharge port 3 into the room. Further, as the fan 4, a fan other than the cross flow fan may be used.

The indoor heat exchanger 5 is provided so as to surround the fan 4 in a side view at a position on the upstream side of the fan 4 in the flow direction of the airflow generated in the casing 1 by the rotation of the fan 4. The indoor heat exchanger 5 includes a first heat exchanger 10 and a second heat exchanger 20. The first heat exchanger 10 is provided obliquely upward in the front direction of the fan 4, and is inclined downward as it goes forward. The second heat exchanger 20 is provided below the first heat exchanger 10 in front of the fan 4. Further, a drain pan 7 that receives dew water generated in the first heat exchanger 10 and the second heat exchanger 20 is provided below the second heat exchanger 20. The indoor heat exchanger 5 according to embodiment 1 further includes a third heat exchanger 30. The third heat exchanger 30 is provided obliquely upward in the rear direction of the fan 4, and is inclined downward as it goes toward the rear.

The first heat exchanger 10 has at least one heat exchange portion. In embodiment 1, the first heat exchanger 10 includes a first heat exchange unit 11 and a second heat exchange unit 12. The second heat exchange portion 12 is disposed in front of the first heat exchange portion 11. That is, in embodiment 1, the second heat exchange portion 12 is a heat exchange portion disposed at the forefront among the heat exchange portions constituting the first heat exchanger 10. The first heat exchanger 10 may be configured by one heat exchange portion, or the first heat exchanger 10 may be configured by three or more heat exchange portions arranged in the front-rear direction. When the first heat exchanger 10 is configured by one heat exchange portion, the heat exchange portion is disposed at the forefront among the heat exchange portions configuring the first heat exchanger 10.

In embodiment 1, the first heat exchange portion 11 and the second heat exchange portion 12 are fin-tube type heat exchange portions. Specifically, the first heat exchange portion 11 and the second heat exchange portion 12 include a plurality of first heat transfer fins 15 and a plurality of first heat transfer tubes 16 through which the refrigerant flows. The plurality of first heat transfer fins 15 are arranged at intervals in the left-right direction. The plurality of first heat transfer pipes 16 extend in the left-right direction, and pass through the plurality of first heat transfer fins 15. The first heat exchange portion 11 and the second heat exchange portion 12 may be heat exchange portions having structures other than fin tube types.

In embodiment 1, the second heat exchanger 20 is a fin-tube type heat exchanger. Specifically, the second heat exchanger 20 includes a plurality of second heat transfer fins 21 and a plurality of second heat transfer tubes 22 in which the refrigerant flows. The plurality of second heat transfer fins 21 are arranged at intervals in the left-right direction. The plurality of second heat transfer pipes 22 extend in the left-right direction, and penetrate the plurality of second heat transfer fins 21. The second heat exchanger 20 may have a structure other than a fin-tube type. In embodiment 1, the second heat exchanger 20 is configured by one heat exchange portion, but the second heat exchanger 20 may be configured by two or more heat exchange portions.

The indoor unit 100 according to embodiment 1 includes the closing member 50, and the closing member 50 covers the space between the first heat exchanger 10 and the second heat exchanger 20 and a part of the first heat exchanger 10 from the front side. Specifically, the closing member 50 includes a closing portion 51, which is a plate-like body formed in a substantially rectangular shape, for example. The sealing portion 51 covers a space between the first heat exchanger 10 and the second heat exchanger 20 and a part of the first heat exchanger 10 from the front side. The lateral width of the closing portion 51 is a length that covers the arrangement range of the first heat transfer fins 15 in the first heat exchanger 10. The upper end 52 of the closing portion 51 is located higher than the front end 14 of the lower end 13 of the second heat exchange portion 12 of the first heat exchanger 10. In other words, the upper end 52 of the closing portion 51 is located higher than the front end 14 of the lower end 13 of the heat exchange portion disposed at the foremost position among the heat exchange portions constituting the first heat exchanger 10. As will be described later, the indoor unit 100 according to embodiment 1 includes the closing member 50 having such a structure, and thus can suppress the phenomenon of dew-water splashing, i.e., the phenomenon of dew-water splashing into the room, more than ever.

In the indoor unit 100 according to embodiment 1, the closing member 50 suppresses noise more than before. Therefore, in embodiment 1, the upper end 52 of the blocking portion 51 is located higher than the first heat transfer pipe 16 disposed at the lowermost position in the second heat exchange portion 12 of the first heat exchanger 10. In other words, the upper end 52 of the blocking portion 51 is located higher than the first heat transfer pipe 16 located lowermost among the heat exchange portions located foremost among the heat exchange portions constituting the first heat exchanger 10. In fig. 3, the first heat exchanger tube 16 disposed lowermost in the second heat exchanger 12 is shown as a first heat exchanger tube 16 a.

Here, in embodiment 1, each heat exchange portion of the first heat exchanger 10 and the second heat exchanger 20 are fin-tube type heat exchangers. Therefore, in embodiment 1, the blocking member 50 is fixed by the heat transfer pipe as follows.

Fig. 4 is a perspective view of a closing member of an indoor unit of an air conditioner according to embodiment 1 of the present invention, as viewed from the front. Fig. 5 is a perspective view of a sealing member of an indoor unit of an air conditioner according to embodiment 1 of the present invention, as viewed from the back side. Fig. 6 is a view showing a state in which a closing member is fixed to an indoor heat exchanger in an indoor unit of an air conditioner according to embodiment 1 of the present invention, and is a perspective view of the vicinity of a first claw portion of the closing member as viewed from the front side. Fig. 7 is a diagram showing a state in which the closing member is fixed to the indoor heat exchanger in the indoor unit of the air conditioner according to embodiment 1 of the present invention, and is a diagram showing the vicinity of the second claw portion of the closing member as viewed from the side. In fig. 7, the left side of the drawing is the front side of the indoor unit 100.

The blocking member 50 includes claw portions 55, and the claw portions 55 are hooked on at least two of the plurality of first heat exchanger tubes 16 of the first heat exchanger 10 and the plurality of second heat exchanger tubes 22 of the second heat exchanger 20 to fix the blocking member 50. In embodiment 1, the claw portion 55 includes a first claw portion 56 and a second claw portion 57.

The first claw portion 56 includes a claw 56a and a claw 56 b. The claws 56a are hooked on the first heat exchanger tube 16 of the first heat exchanger 10 outside the arrangement range of the first heat transfer fins 15 in the first heat exchanger 10. In other words, the claws 56a are arranged outside the outermost first heat transfer fins 15 in the lateral direction and hook into the first heat transfer pipe 16 of the first heat exchanger 10. The claws 56b are hooked on the second heat exchanger 22 of the second heat exchanger 20 outside the arrangement range of the second heat transfer fins 21 in the second heat exchanger 20. In other words, the claws 56b are arranged outside the outermost second heat transfer fins 21 in the lateral direction and hook into the second heat transfer pipe 22 of the second heat exchanger 20.

The second claw portion 57 includes a claw 57a and a claw 57 b. The claws 57a are hooked on the first heat transfer pipe 16 of the first heat exchanger 10 between the adjacent first heat transfer fins 15 of the first heat exchanger 10. The claws 57b are hooked on the second heat transfer pipe 22 of the second heat exchanger 20 between the adjacent second heat transfer fins 21 of the second heat exchanger 20.

When only one heat transfer pipe is hooked by the claw of the claw portion 55, the closing member 50 cannot be fixed because the closing member 50 rotates around the heat transfer pipe. However, the closing member 50 can be fixed by hooking the claws of the claw portions 55 to two or more heat transfer pipes.

Next, in the indoor unit 100 according to embodiment 1, a description will be given of a drainage operation of dew condensation water when dew condensation occurs in the first heat exchanger 10 of the indoor heat exchanger 5. In order to make it easier to recognize the dew-water splashing suppression effect by the closing member 50, first, a description will be given below of a dew-water discharge operation in the case where the conventional sealing member 150 is provided in the indoor unit 100 according to embodiment 1 in place of the closing member 50. Next, the operation of discharging dew-water in the indoor unit 100 according to embodiment 1 will be described.

Fig. 8 is a diagram for explaining a dew-water discharging operation in an indoor unit of an air conditioner including a conventional sealing member. The indoor unit shown in fig. 8 is an indoor unit in which the closing member 50 is removed from the indoor unit 100 according to embodiment 1, and a conventional seal member 150 is attached in place of the closing member 50. Fig. 8 is a side view of the internal structure of the indoor unit. In fig. 8, the left side of the drawing is the front side of the indoor unit.

The conventional seal member 150 covers the space between the first heat exchanger 10 and the second heat exchanger 20 and a part of the first heat exchanger 10 from the front side, similarly to the seal member 50. However, the upper end 152 of the conventional seal member 150 is located lower than the upper end 52 of the closing member 50. Specifically, the upper end 152 of the conventional seal member 150 is located lower than the front end 14 of the lower end 13 of the second heat exchange unit 12 of the first heat exchanger 10.

When the indoor heat exchanger 5 functions as an evaporator, the indoor air taken into the casing 1 by the fan 4 is cooled by the refrigerant flowing through the indoor heat exchanger 5. At this time, moisture in the indoor air is condensed in the indoor heat exchanger 5, and the dew water 60 adheres to the indoor heat exchanger 5. Generally, dew water 60 attached to the first heat exchanger 10 flows down along the first heat exchanger 10 to reach the second heat exchanger 20, and is attached to the second heat exchanger 20. Then, the dew water 60 adhering to the second heat exchanger 20 flows down along the second heat exchanger 20, and is discharged to the drain pan 7 disposed below the second heat exchanger 20. The dew water 60 discharged to the drain pan 7 is discharged to the outside of the room through a pipe or the like not shown.

Here, for example, environmental factors such as a spray having a water repellent function, such as hair spray, are used in a large amount indoors, and thus the degree of water repellency of the indoor heat exchanger 5 may increase. In this case, the degree of hydrophobicity of the first heat exchanger 10 increases, and the speed of the dew water 60 falling down along the first heat exchanger 10 increases. Therefore, the dew water 60 falling down along the first heat exchanger 10 cannot reach the second heat exchanger 20 but flies out to the front of the second heat exchanger 20.

At this time, since the upper end 152 of the conventional seal member 150 is located at a low position, the dew-water 60 falling down along the first heat exchanger 10 passes over the second heat exchanger 20 and the seal member 150 as indicated by the broken-line arrow in fig. 8. Then, the dew-water 60 flying out to the front of the second heat exchanger 20 and the sealing member 150 cannot be received by the drain pan 7. Therefore, the dew-water 60 flying out to the front of the second heat exchanger 20 and the sealing member 150 flies out into the room, and the dew-water flies out. Further, if the drain pan 7 is enlarged in the front-rear direction, the dew-water 60 flying forward of the second heat exchanger 20 and the sealing member 150 may be caught by the drain pan 7. However, if the drain pan 7 is enlarged in the front-rear direction, the size of the housing 1 in the front-rear direction is also increased. Since the size of the casing 1 is limited, it is not practical to increase the drain pan 7 in the front-rear direction in order to suppress dew-water flying.

On the other hand, in the indoor unit 100 according to embodiment 1 including the closing member 50, the dew-water 60 adhering to the first heat exchanger 10 is discharged as follows.

Fig. 9 is a diagram for explaining a dew-water discharging operation in the indoor unit of the air conditioner according to embodiment 1 of the present invention. Fig. 9 is a side view of the internal structure of the indoor unit 100 according to embodiment 1. In fig. 9, the left side of the drawing is the front side of the indoor unit 100 according to embodiment 1.

As described above, when the water repellency of the first heat exchanger 10 increases, the dew water 60 falling down along the first heat exchanger 10 flies out to the front of the second heat exchanger 20. At this time, dew water 60 falling along the first heat exchanger 10 flies out from the lower end of the first heat exchanger 10. Therefore, the dew-water 60 flying out from the highest position among the dew-water 60 flying out from the first heat exchanger 10 is the dew-water 60 flying out from the first highest position among the lower ends of the first heat exchanger 10. That is, the dew-water 60 flying out from the highest position among the dew-water 60 flying out from the first heat exchanger 10 is the dew-water 60 flying out from the front end 14 of the lower end 13 of the second heat exchange portion 12.

Here, as described above, the upper end 52 of the closing portion 51 is located higher than the front end 14 of the lower end 13 of the second heat exchange portion 12 of the first heat exchanger 10. That is, the upper end 52 of the closing portion 51 is higher than the dew-water 60 that flies out from the highest position among the dew-water 60 that flies out from the first heat exchanger 10. Therefore, as shown by the broken line arrows in fig. 9, in the indoor unit 100 according to embodiment 1, even if the dew-water 60 that has fallen along the first heat exchanger 10 tries to fly out to the front of the second heat exchanger 20, the dew-water 60 that has tried to fly out to the front of the second heat exchanger 20 collides with the blocking member 50.

Then, the dew water 60 having collided with the blocking member 50 flows down along the blocking member 50 to reach the second heat exchanger 20, and is attached to the second heat exchanger 20. Then, the dew water 60 adhering to the second heat exchanger 20 flows down along the second heat exchanger 20, and is discharged to the drain pan 7 disposed below the second heat exchanger 20. Therefore, in the indoor unit 100 according to embodiment 1, dew condensation can be suppressed from flying out more than before even when the degree of water repellency of the first heat exchanger 10 is increased.

In consideration of the size of the dew-water 60, it is more preferable that the upper end 52 of the closing portion 51 is located higher than the front end 14 of the lower end 13 of the second heat exchange portion 12 of the first heat exchanger 10 by the size of the dew-water 60 or more. For example, the size of the dew water 60 is set to 5 mm. In this case, the upper end 52 of the closing portion 51 is more preferably set to a position higher by 5mm or more than the front end 14 of the lower end 13 of the second heat exchange portion 12 of the first heat exchanger 10. This enables the dew condensation water 60 to be more reliably captured by the closing member 50, and the dew condensation water can be more suppressed from flying out.

In the indoor unit 100 according to embodiment 1, the upper end 52 of the blocking portion 51 of the blocking member 50 is located higher than the first heat transfer pipe 16 disposed at the lowermost position in the second heat exchange portion 12 of the first heat exchanger 10. Therefore, in the indoor unit 100 according to embodiment 1, noise generated by the fan 4 can be suppressed more than before.

Specifically, if an uneven airflow having a difference in air volume distribution flows into the fan 4, noise generated by the fan 4 increases. In the indoor unit 100 according to embodiment 1, only the first heat exchange portion 11 is present in the direction of the airflow passing through the first heat exchanger 10 by the rotation of the fan 4 at the position indicated by the arrow a in fig. 8 and 9. In other words, the air flow passing through the position indicated by the arrow a in fig. 8 and 9 passes through the heat exchanger in which two rows of the first heat transfer pipes 16 are arranged in the direction of the air flow. On the other hand, in the positions indicated by the arrow B in fig. 8 and 9, the first heat exchange portion 11 and the second heat exchange portion 12 are present in the direction of the airflow passing through the first heat exchanger 10 by the rotation of the fan 4. In other words, the air flow passing through the position indicated by the arrow B in fig. 8 and 9 passes through the heat exchanger in which the three rows of the first heat transfer tubes 16 are arranged in the direction of the air flow. That is, the air resistance is smaller at the position of arrow a than at the position of arrow B.

Here, as described above, the upper end 152 of the conventional seal member 150 is located low. Therefore, as shown in fig. 8, when the conventional seal member 150 is provided, the air flow passes through the position of arrow a. At this time, since the air resistance is smaller at the position of arrow a than at the position of arrow B, the flow velocity of the air flowing at the position of arrow a becomes larger than the flow velocity of the air flowing at the position of arrow B. Therefore, the flow rate of the air flowing at the position of the arrow a is larger than the flow rate of the air flowing at the position of the arrow B. Therefore, when the conventional seal member 150 is provided, the air passing through the position of arrow a and the air passing through the position of arrow B flow into the fan 4. Therefore, when the conventional sealing member 150 is provided, the airflow having a difference in air volume distribution flows into the fan 4, and the noise generated by the fan 4 increases.

On the other hand, the upper end 52 of the blocking portion 51 of the blocking member 50 according to embodiment 1 is located higher than the first heat transfer pipe 16 disposed lowermost in the second heat exchange portion 12 of the first heat exchanger 10. That is, as shown in fig. 9, the closing portion 51 of the closing member 50 according to embodiment 1 is configured to cover the position of the arrow a from the front. Therefore, in the indoor unit 100 according to embodiment 1, the air passing through the position indicated by the arrow B flows into the fan 4. Therefore, in the indoor unit 100 according to embodiment 1, the airflow having a more uniform airflow distribution flows into the fan 4 than in the conventional case, and the noise generated by the fan 4 can be suppressed more than in the conventional case.

In addition, when the air resistance of the first heat exchanger 10 is different from the air resistance of the second heat exchanger 20, a large amount of air is desired to flow to the heat exchanger having the smaller air resistance. For example, in embodiment 1, the second heat exchanger 20 has the following structure: the second heat transfer pipes 22 are arranged in two rows in the direction of the airflow passing through the second heat exchanger 20 by the rotation of the fan 4. On the other hand, the first heat exchanger 10 has the following structure: within the range where the first heat exchange portion 11 and the second heat exchange portion 12 are arranged in parallel, the first heat transfer tubes 16 are arranged in three rows in the direction of the airflow passing through the first heat exchanger 10 by the rotation of the fan 4. Therefore, in the case of embodiment 1, the air resistance of the second heat exchanger 20 is smaller than the air resistance of the first heat exchanger 10. Therefore, a larger amount of air is intended to flow in the second heat exchanger 20 than in the first heat exchanger 10.

Therefore, there are also cases where: due to the difference between the flow rate of the air passing through the second heat exchanger 20 and the flow rate of the air passing through the first heat exchanger 10, an uneven airflow having a difference in air volume distribution flows into the fan 4, and the noise generated by the fan 4 increases. In this case, as shown in fig. 3 and 9, the following configuration may be adopted: the second heat exchanger 20 is partially covered with the closing member 50 from the front side, and the air is made difficult to flow through the second heat exchanger 20. This can suppress the difference in the air volume distribution of the air flowing into the fan 4, and can suppress the noise generated by the fan 4 more than before. The range covering the second heat exchanger 20 necessary to suppress the difference in the air volume distribution of the air flowing into the fan 4 differs depending on the capacity of the fan 4. Therefore, the position of the lower end 53 of the closing portion 51 of the closing member 50 differs depending on the capacity of the fan 4.

The material of the closing member 50 is not particularly limited, but is preferably a material that does not deform due to the airflow generated by the rotation of the fan 4. For example, a resin or a metal is preferable as a material of the sealing member 50. That is, the closing member 50 is preferably formed of at least one of resin and metal.

As described above, the indoor unit 100 of the air conditioner according to embodiment 1 includes the first heat exchanger 10, the second heat exchanger 20, the drain pan 7, and the sealing member 50. The first heat exchanger 10 is inclined downward toward the front. The second heat exchanger 20 is disposed below the first heat exchanger 10. The drain pan 7 is disposed below the second heat exchanger 20. The sealing member 50 covers a part of the first heat exchanger 10 and a part of the space between the first heat exchanger 10 and the second heat exchanger 20 from the front side. In addition, the first heat exchanger 10 has at least one heat exchange portion. Then, the upper end 52 of the closing member 50 is higher than the front end of the lower end of the heat exchange portion disposed at the foremost side among the heat exchange portions of the first heat exchanger 10.

In the indoor unit 100 of an air conditioner according to embodiment 1, even if the degree of water repellency of the first heat exchanger 10 increases and the dew-water 60 falling down along the first heat exchanger 10 tries to fly out to the front of the second heat exchanger 20, the dew-water 60 collides with the blocking member 50. Then, the dew water 60 having collided with the blocking member 50 flows down along the blocking member 50 to reach the second heat exchanger 20, and is attached to the second heat exchanger 20. Then, the dew water 60 adhering to the second heat exchanger 20 flows down along the second heat exchanger 20, and is discharged to the drain pan 7 disposed below the second heat exchanger 20. Therefore, in the indoor unit 100 of an air conditioner according to embodiment 1, dew condensation can be suppressed from flying out more than before even when the degree of water repellency of the first heat exchanger 10 is increased.

Embodiment mode 2

The shape of the closing member 50 is not limited to the shape shown in embodiment 1. For example, the shape of the closing member 50 may be the same as that shown in embodiment 2. Note that items not described in particular in embodiment 2 are the same as those in embodiment 1, and the same functions and configurations as those in embodiment 1 are described using the same reference numerals.

Fig. 10 is a side view of the internal structure of an indoor unit of an air conditioner according to embodiment 2 of the present invention. In fig. 10, the left side of the drawing is the front side of the indoor unit 100.

In embodiment 2, a partial range of the closing portion 51 of the closing member 50 including the upper end 52 is inclined rearward as it goes upward. That is, the upper portion of the closing portion 51 of the closing member 50 is inclined rearward as it goes upward. For example, a partial range of the closing portion 51 of the closing member 50 including the upper end 52 is inclined rearward toward the upper side so as to be along the front surface of the first heat exchanger 10.

In the case where the closing member 50 is configured as described above, the dew-water 60 falling along the first heat exchanger 10 flows below the upper portion of the closing portion 51 before flying out of the first heat exchanger 10. Therefore, the closing member 50 according to embodiment 2 can suppress the dew-water 60 flying out of the first heat exchanger 10 from passing over the closing member 50 more than the closing member 50 shown in embodiment 1. Therefore, the indoor unit 100 according to embodiment 2 can suppress dew condensation from flying out more than embodiment 1.

Description of reference numerals:

1 … shell; 2 … suction inlet; 3 … discharge port; 4 … fan; 5 … indoor heat exchanger; 6 … outer shell; 7 … drain pan; 10 … a first heat exchanger; 11 … a first heat exchange portion; 12 … a second heat exchange portion; 13 … lower end; 14 … front end; 15 … first heat-conducting fins; 16 … a first heat conductive pipe; 20 … a second heat exchanger; 21 … second heat conducting fins; 22 … second heat conductive pipe; 30 … a third heat exchanger; 50 … closure member; a 51 … closure; 52 … upper end; 53 … lower end; 55 … claw parts; 56 … first jaw portion; 56a … jaw; 56b … claw; 57 … second jaw portion; 57a … claws; 57b … jaw; 60 … dew; 100 … indoor unit; 150 … sealing member (conventional); 152 … upper end (past).

Claims

1. An indoor unit of an air conditioner, in which,

the disclosed device is provided with:

a first heat exchanger inclined downward toward the front;

a second heat exchanger disposed below the first heat exchanger;

a drain pan provided below the second heat exchanger; and

a sealing member that covers a space between the first heat exchanger and the second heat exchanger and a part of the first heat exchanger from a front side,

the first heat exchanger has at least one heat exchange portion,

the upper end of the closing member is higher than the front end of the lower end of the heat exchanging portion disposed at the foremost side.

2. The indoor unit of an air conditioner according to claim 1,

the heat exchange unit includes:

a plurality of first heat-conducting fins arranged at intervals in the left-right direction; and

and a plurality of first heat transfer pipes that pass through the plurality of first heat transfer fins.

3. The indoor unit of an air conditioner according to claim 2,

the upper end of the closing member is higher than the first heat transfer pipe disposed lowermost in the heat exchange portion disposed foremost.

4. The indoor unit of an air conditioner according to claim 2 or 3, wherein,

the second heat exchanger includes:

a plurality of second heat-conducting fins arranged at intervals in the left-right direction; and

a plurality of second heat transfer pipes that pass through the plurality of second heat transfer fins,

the blocking member includes a claw portion that is hooked on at least two of the plurality of first heat transfer pipes and the plurality of second heat transfer pipes to fix the blocking member.

5. The indoor unit of an air conditioner according to any one of claims 1 to 4, wherein,

the sealing member is formed of at least one of a resin and a metal.

6. The indoor unit of an air conditioner according to any one of claims 1 to 5, wherein,

the range of a part of the closing member including the upper end is inclined rearward as it goes upward.