WO2013118464A1

WO2013118464A1 - Indoor unit for air conditioner

Info

Publication number: WO2013118464A1
Application number: PCT/JP2013/000496
Authority: WO
Inventors: 善治道辻
Original assignee: ダイキン工業株式会社
Priority date: 2012-02-10
Filing date: 2013-01-30
Publication date: 2013-08-15
Also published as: JP2013164185A; EP2829816A4; CN104114953A; EP2829816A1; CN104114953B; JP5382153B2; EP2829816B1

Abstract

An indoor unit (2) for an air conditioner (1) is characterized by having: a drain receiving section (52) having a drain pan (50) that extends along a heat exchanger (10) and receives water generated on a surface of the heat exchanger (10) at the underside thereof; and a partition wall (54) that is erected in such a manner as to be in contact with the heat exchanger (10) from the underside, and partitions the drain receiving section (52) into a primary side and a secondary side so as to form an inner groove (56) that receives the water at the primary side, and an outer groove (58) that receives the water at the secondary side. The indoor unit (2) is further characterized in that: the bottom of the outer groove (58) and the bottom of the inner groove (56) each have an inclination that forms a descending slope in such a manner that the water flows toward the drain pipe (60); and the average angle of inclination at the bottom of the outer groove (58) is greater than the angle of inclination at the bottom of the inner groove (56).

Description

Air conditioner indoor unit

The present invention relates to an indoor unit of an air conditioner that performs a vapor compression refrigeration cycle by circulating refrigerant.

Patent Document 1 discloses an indoor unit of an air conditioner. As shown in FIGS. 10 and 11, this indoor unit includes a blower 102, a heat exchanger 104 that cools or heats the air from the blower 102, a drain pan 106 that is disposed below the heat exchanger 104, And a drain pump 108 for discharging water (drain) accumulated in the drain pan 106 to the outside of the indoor unit 100.

The drain pan 106 has a drain receiving portion 107 that receives, on the lower side of the heat exchanger 104, water generated on the surface of the heat exchanger 104 due to condensation of moisture in the air. The drain receiving portion 107 is located below the heat exchanger 104 on the upstream side (primary side) of the heat exchanger 104 in the air flow direction w by the blower 102 and on the downstream side (secondary side) in the air flow direction w. Side). The bottom surface 107A of the drain receiving portion 107 has a downward slope toward the drain pump 108 (see FIG. 11). As a result, the water received by the drain receiving portion 107 (water generated on the surface of the heat exchanger 104) is collected in the drain pump 108. The drain pump 108 drains the collected water (drain), so that the drain is efficiently drained from the drain pan 106.

In the indoor unit 100 described above, the pressure on the primary side in the indoor unit 100 becomes higher than the pressure on the secondary side due to the air blow w of the blower 102 during operation. For this reason, the water level (water surface) of the drain in the drain receiving part 107 becomes higher on the secondary side than on the primary side (see FIG. 10).

Thus, when the water level on the secondary side becomes high, the drain on the secondary side is waved by the blown-out air w, and a part of the drain is scattered from the outlet 109 of the indoor unit 100 to the outside of the indoor unit 100. Concerned.

JP 2007-255739 A

An object of the present invention is to provide an indoor unit of an air conditioner in which water is hardly scattered from the drain pan to the outside by blown air.

According to one aspect of the present invention, an indoor unit of an indoor air conditioner includes a heat exchanger, a drain pan disposed below the heat exchanger, and a drain pump that discharges water accumulated in the drain pan to the outside. And comprising. The drain pan extends along the heat exchanger, and a drain receiving portion that receives the water generated on the surface of the heat exchanger below the heat exchanger, and abuts on the heat exchanger from below In this way, the drain receiving portion is partitioned into an upstream side and a downstream side in the air flow, thereby receiving the water on the upstream side in the air flow, and the water in the air flow. And a partition wall that forms an outer groove received on the downstream side. The bottom part of the outer groove part and the bottom part of the inner groove part each have an inclination that becomes a downward slope so that the water flows toward the drain pump. The inclination angle at the bottom of the outer groove is larger than the inclination at the bottom of the inner groove.

FIG. 1 is a schematic configuration diagram of an air conditioner according to the present embodiment. FIG. 2 is a perspective view of the indoor unit in the air conditioner. FIG. 3 is a longitudinal sectional view of the indoor unit. FIG. 4 is a plan view showing an arrangement state of the heat exchanger and the drain pan in the indoor unit. FIG. 5 is a plan view of the drain pan. FIG. 6 is a view showing ranges of the inner groove portion, the outer groove portion, and the communication portion of the drain pan. 7 is a cross-sectional view taken along the line VII-VII in FIG. FIG. 8 is an enlarged end view of the position VIII-VIII in FIG. FIG. 9 is a partially enlarged perspective view showing a state in which the heat exchanger is arranged on the drain pan. FIG. 10 is a longitudinal sectional view in the width direction of an indoor unit of a conventional air conditioner. FIG. 11 is a longitudinal sectional view in the length direction (direction orthogonal to the width direction) of the indoor unit of the conventional air conditioner.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, an indoor unit according to the present embodiment (hereinafter simply referred to as “indoor unit”) is connected to an outdoor unit 3 through

pipes

4 and 4 to constitute an air conditioner 1. The air conditioner 1 has a refrigerant circuit. This refrigerant circuit has an indoor heat exchanger 10, a compressor 12, an outdoor heat exchanger 13, an expansion valve 14, and a four-way switching valve 15 as main components. In the air conditioner 1, the circulation direction of the refrigerant in the refrigerant circuit is switched by switching the four-way switching valve 15. Thereby, in the air conditioning apparatus 1, switching between the cooling operation and the heating operation is performed.

The indoor unit 2 is a ceiling suspended type (so-called ceiling suspended type). As shown in FIGS. 2 and 3, the indoor unit 2 includes a casing 21 that is suspended from the ceiling by a suspension member such as a suspension bolt that extends from the ceiling, and a decorative plate 22 that is attached to the lower portion of the casing 21. Prepare. The casing 21 includes a substantially square top plate 23 and a side wall 24 extending substantially downward from the periphery of the top plate 23. In the part of the side wall 24 corresponding to each side of the top plate 23, a blower outlet 25 is provided at a substantially central portion in the horizontal direction. A wind direction plate 25 </ b> A is provided at the air outlet 25. The wind direction plate 25 </ b> A changes the blowing direction of the temperature-adjusted wind blown from the blower outlet 25. The wind direction plate 25A is a rectangular plate member that is long in the horizontal direction. A swing motor (not shown) is connected to both ends of the wind direction plate 25A in the horizontal direction. The wind direction plate 25A is swung or rotated by driving the swing motor. The decorative plate 22 has a rectangular suction grill 26 at the center thereof.

The indoor unit 2 includes a blower 27, a bell mouth 28, an air filter 29, an indoor heat exchanger 10, a drain pan 50, a drain pump 60 (see FIG. 4), and the like in the casing 21.

The blower 27 is a centrifugal blower (turbo fan) having an impeller 31 and a fan motor 32. The blower 27 is arranged at a position where the suction port 33 of the blower 27 faces the suction grille 26 of the decorative plate 22. The blower 27 blows out air (indoor air or the like) sucked from the lower suction port 33 to the side (toward the indoor heat exchanger 10). A bell mouth 28 is disposed between the suction port 33 of the blower 27 and the suction grille 26.

The air filter 29 has a size that covers the entrance of the bell mouth 28. The air filter 29 is disposed between the bell mouth 28 and the suction grille 26 so as to be along the suction grille 26.

The indoor heat exchanger 10 includes a plurality of thin plate-

like fins

34, 34,... And a plurality of

heat transfer tubes

35, 35,... Inserted through through holes formed in the fins 34. The indoor side heat exchanger 10 is a so-called cross fin type heat exchanger. The indoor heat exchanger 10 is disposed so as to surround the fan 27 (the impeller 31) from the horizontal direction. The indoor heat exchanger 10 performs heat exchange between the refrigerant flowing in each heat transfer tube 35 and the indoor air (outside air) blown from the blower 27 via the tube wall of the heat transfer tube 35 and the fins 34.

The drain pan 50 receives water droplets generated in the indoor heat exchanger 10 and prevents the water from falling into the room. The drain pan 50 is arranged along the indoor heat exchanger 10 below the indoor heat exchanger 10 (see FIG. 4).

Specifically, as shown in FIGS. 5 to 9, the drain pan 50 has a substantially quadrangular shape with an opening at the center (ie, having an opening 51 at a position corresponding to the suction port 33 of the blower 27) in plan view. . The drain pan 50 includes a drain receiving portion 52 and a partition wall 54.

The drain receiving part 52 is formed by a groove (concave part) extending along the indoor heat exchanger 10. The drain receiver 52 receives water generated on the surface of the indoor heat exchanger 10 due to condensation of moisture in the air on the lower side of the indoor heat exchanger 10. A drain pump 60 is disposed at the downstream end of the drain receiving portion 52 (termination: in the vicinity of the upper end of the left side in FIGS. 5 and 6).

The partition wall 54 is erected between both side walls (left and right side walls in FIG. 7) of the drain receiving portion 52 so as to contact the indoor heat exchanger 10 from below. The partition wall 54 partitions the space in the drain receiving portion (groove) 52 into a primary region and a secondary region, thereby forming an inner groove portion 56 and an outer groove portion 58. That is, the partition wall 54 is a wall defined by the wall surface of the inner groove portion 56 on the outer groove portion 58 side and the wall surface of the outer groove portion 58 on the inner groove portion 56 side. Here, the primary region is a region upstream of the indoor heat exchanger 10 in the air flow W (see FIG. 3) blown out from the blower 27. The secondary region is a region downstream of the indoor heat exchanger 10 in the air flow W.

The inner groove portion 56 extends along the indoor heat exchanger 10 and receives water generated on the surface of the indoor heat exchanger 10 in a primary region. Specifically, the inner groove portion 56 extends along each side of the substantially square drain pan 50 in a plan view and surrounds the opening 51. In the example of FIGS. 5 and 6, the inner groove portion 56 extends along each side of the drain pan 50 clockwise starting from the vicinity of the left end of the upper side of the drain pan 50. The inner groove portion 56 communicates with the outer groove portion 58 at the end point (near the upper end of the left side), thereby communicating with the drain pump 60. The bottom portion 56 a of the inner groove portion 56 is inclined so as to have a constant downward gradient from the starting point toward the drain pump 60. That is, at each position in the longitudinal direction of the inner groove portion 56, the water (drain) dripped from the indoor heat exchanger 10 flows in the inner groove portion 56 toward the drain pump 60.

The outer groove portion 58 extends along the indoor heat exchanger 10 and receives water generated on the surface of the indoor heat exchanger 10 in the secondary region. Similar to the inner groove portion 56, the bottom portion of the outer groove portion 58 is inclined so as to have a downward slope so that the drain flows toward the drain pump 60. The inclination angle of the bottom portion of the outer groove portion 58 is larger than the inclination angle of the bottom portion 56 a of the inner groove portion 56.

Specifically, the outer groove portion 58 extends along the inner groove portion 56 outside the inner groove portion 56 (on the side opposite to the opening 51 of the drain pan 50). That is, the outer groove portion 58 extends outside the inner groove portion 56 so as to follow each side of the drain pan 50 having a substantially square shape in plan view and surround the opening 51.

The outer groove portion 58 is partitioned into a plurality of sections in the longitudinal direction (water flow direction of the inner groove portion 56). The outer groove portion 58 of the present embodiment is partitioned into four sections, a first section 581, a second section 582, a third section 583, and a fourth section 584. Specifically, the outer groove portion 58 is partitioned at the corner portion of the drain pan 50. In the outer groove portion 58 of the present embodiment, a section along the upper side of the drain pan 50 shown in FIGS. 5 and 6 is defined as a first section 581, and a section along the right side is defined as a second section 582. A section along the side is referred to as a third section 583, and a section along the left side is referred to as a fourth section 584.

The bottom of each of the sections 581 to 584 has a downward slope along the drain flow direction in the inner groove 56. That is, the bottom of the first section 581 is inclined so that the left end (starting end) 581A in FIG. 6 is the highest and the right end (end) 581B is the lowest. The bottom of the second section 582 is inclined so that the upper end (starting end) 582A in FIG. 6 is the highest and the lower end (ending end) 582B is the lowest. The bottom of the third section 583 is inclined so that the right end (start end) 583A in FIG. 6 is the highest and the left end (end end) 583B is the lowest. The bottom of the fourth section 584 is inclined such that the lower end (starting end) 584A in FIG. 6 is the highest and the upper end (ending end) 584B (specifically, the position where the drain pump 60 is disposed) is the lowest. The height positions of the bottoms of the start ends 581A to 584A in the sections 581 to 584 are the same, and the height positions of the bottoms of the end points 581B to 584B in the sections 581 to 584 are the same. That is, in the adjacent sections (for example, the second section 582 and the third section 583), the bottom height position at the end of the upstream section (for example, the end 582B of the second section 582) and the start end of the downstream section A height difference is provided between the bottom portion and the height position (for example, the start end 583A of the third section 583).

In the drain pan 50 of this embodiment, the positioning part 59 which positions the said indoor side heat exchanger 10 with respect to the drain pan 50 by making the side part of the indoor side heat exchanger 10 contact | abut is between the adjacent areas. Is formed. The positioning unit 59 is located upward from the bottom position of the end of the upstream section (for example, the end 582B of the second section 582) between the adjacent sections (for example, the second section 582 and the third section 583). Thus, the outer groove portion 58 is formed so as to be divided into the sections 581 to 584. Using this positioning portion 59, the end of the upstream section (for example, the end 582B of the second section 582) and the start end of the downstream section adjacent to the end (for example, the start end 583A of the third section 583) A difference in height is formed at the bottom. Incidentally, the bottom heights of the ends of the end portions 581B to 583B in the first to third sections 581 to 583 correspond to the end portions 581B to 583B in the inner groove portion 56 (portions connected by the communication portion 540 described later). The height positions of the start ends 581A to 583A in the first to third sections 581 to 583 are set so as to be the same as or higher than the first position.

In addition, the inclination angle of the bottom of each of the sections 581 to 584 changes in the middle part in the longitudinal direction. That is, the inclination angle of the bottom of each of the sections 581 to 584 is different between the part on the start end 581A to 584A side and the part on the end end 581B to 584B side. Specifically, the inclination angle of the bottom of each section 581 to 584 is the same as the inclination angle of the bottom 56a of the inner groove portion 56 from the center in the longitudinal direction to the terminal ends 581B to 584B, and from the start end 581A to 584A to the center in the longitudinal direction. It is larger than the inclination angle of the bottom portion 56 a of the groove portion 56. For this reason, the average inclination angle of the bottom of each of the sections 581 to 584 is larger than the inclination angle of the bottom 56 a of the inner groove 56. As described above, by increasing the inclination angle of the bottom portion of the start end 581A to 584A side than the center in the longitudinal direction, the drain received at the start end 581A to 584A side portion can be vigorously flowed toward the end points 581B to 584B. Can do. By this flow, the drain at the end 581B to 584B side from the longitudinal center is pushed to the end 581B to 584B.

In the outer groove portion 58 of the present embodiment, the inclination angle of the bottom portion is an average inclination angle between the start end 581A and the end end 584B in the entire outer groove portion 58. This average inclination angle is larger than the inclination angle of the bottom portion 56 a of the inner groove portion 56. The inclination angle of the bottom portion 56a of the inner groove portion 56 may also be an average inclination angle between the start end 56A and the end end 56B of the inner groove portion 56.

As described above, the outer groove portion 58 is divided in the longitudinal direction (the water flow direction of the inner groove portion 56), and the end of the upstream section in the adjacent section (for example, the end 582B of the second section 582) and the downstream side The slope of the bottom of the outer groove portion 58 (each of the sections 581 to 584) is steeply inclined by providing a sawtooth arrangement with a difference in height from the start end of the section (for example, the start end 583A of the third section 583). In addition, the thickness of the drain pan 50 can be suppressed.

Communicating portions 540 that communicate the outer groove portion 58 and the inner groove portion 56 are provided at positions corresponding to the end points 581B to 584B of the sections 581 to 584 in the partition wall 54, respectively. The communication portion 540 is a portion where drainage flows from the outer groove portion 58 to the inner groove portion 56 or from the inner groove portion 56 to the outer groove portion 58. The communication part 540 is a groove (see FIG. 8) provided so as to cross the partition wall 54. The communication portion 540 is not limited to a groove, and may be a through-hole that communicates the outer groove portion 58 and the inner groove portion 56.

In the present embodiment, the end points 581B to 583B of the first to third sections 581 to 583 are the corners of the drain pan 50 (that is, the corners of the casing 21 of the indoor unit 2 and shifted from the front position of the air outlet 25). ). Therefore, communication portions 540 provided at positions corresponding to these end points 581B to 583B are also provided at the corners of the drain pan 50, respectively. In addition, each linear part 53 in the peripheral part of the drain pan 50 is a site | part which prescribes | regulates the lower end of each blower outlet 25 of the indoor unit 2 (refer FIG. 3).

In the terminal ends 581B to 583B of the first to third sections 581 to 583, the bottom part of the outer groove part 58 and the bottom part of the communication part 540 are integrated to form an inclined surface having a downward slope toward the inner groove part 56. As a result, the drain flowing from the start ends 581A to 583A in the first to third sections 581 to 583 surely flows into the end grooves 581B to 583B through the inner groove portion 56 without staying in the end portions 581B to 583B.

The drain pump 60 is disposed at the end 584B of the fourth section 584. The drain that has flowed through the inner groove 56 (including the drain that has flowed into the inner groove 56 through the first to third sections 581 to 583) includes the end 56B of the inner groove 56 and the end 584B of the fourth section 584. Flows into the end 584B of the fourth section 584 through the communication portion 540 (see FIG. 9).

The drain pump 60 has a pump body 61 and a water level sensor 62. In the drain pump 60, when the water level sensor 62 detects that the drain accumulated at the end 584B (end of the outer groove 58) of the fourth section 584 has reached a predetermined water level, the pump body 61 is driven to remove the drain. Discharge outside the indoor unit 2.

In the indoor unit 2 described above, the drain of the drain receiving portion 52 moves to the primary side region (that is, moves from the inner groove portion 56 to the outer groove portion 58) due to the pressure difference between the primary side region and the secondary side region. Is prevented by providing a partition wall 54 in the drain pan 50. Thereby, it is possible to reliably prevent the water level in the secondary region (outer groove portion 58) from rising in the drain receiving portion 52. Further, by making the bottom portion of the outer groove portion 58 steeper than the bottom portion of the inner groove portion 56, the drain received by the outer groove portion 58 can be quickly flowed to the drain pump 60 side. Thereby, it is possible to shorten the time during which the drain is present in the secondary region (outer groove portion 58), and to effectively prevent the drain from being scattered outside the indoor unit 2.

Further, in the indoor unit 2 of the present embodiment, the drain flowing through the outer groove portion 58 can flow into the inner groove portion 56 through the communication portion 540 on the way to the drain pump 60. For this reason, the time during which the drain stays in the outer groove portion 58 is shortened, and the drain of the outer groove portion 58 can be more reliably prevented from being scattered outside the indoor unit 2. Specifically, at the position where the communication portion 540 is provided, the height position of the bottom portion of the outer groove portion 58 is the same as or higher than the height position of the bottom portion of the inner groove portion 56. For this reason, when the drain flowing through the outer groove portion 58 reaches the position of the communication portion 540, the drain flows from the outer groove portion 58 into the inner groove portion 56 through the communication portion 540. As a result, the distance that the drain flows through the outer groove portion 58 becomes shorter, and the time that the drain stays in the outer groove portion 58 becomes shorter.

In addition, since the communication portion 540 is provided at a position shifted from the front position of the air outlet 25 of the indoor unit 2, the air that has passed through the communication portion 540 from the air outlet 25 compared to the case where it is provided at the front position. It is hard to be blown out. For this reason, the flow volume of the air which blows off from the area | region of a primary side to the area | region of a secondary side through the communication part 540 is suppressed. As a result, the scattering of the drain of the outer groove portion 58 and the communication portion 540 due to the air flow to the outside of the indoor unit 2 is suppressed.

In the indoor unit 2 of the present embodiment, the distance that the drain can flow through the outer groove portion 58 is shortened by partitioning the outer groove portion 58 into a plurality of sections 581 to 584. That is, in the outdoor unit 2 of this embodiment, the time for which the drain stays in the outer groove portion 58 is further shortened by partitioning the outer groove portion 58 into a plurality of sections 581 to 584. Thereby, it is possible to more reliably prevent the drain from scattering from the outer groove portion 58 to the outside of the indoor unit 2.

In addition, by dividing the outer groove portion 58 into a plurality of sections 581 to 584, the upstream end of the adjacent section (for example, the end 582B of the second section 582) and the downstream end of the downstream section (for example, the third section 582). A saw-toothed arrangement with a difference in height from the start end 583A) of the section 583 is possible. Accordingly, the thickness of the drain pan 50 can be suppressed while making the slope of the bottom of the outer groove portion 58 (the sections 581 to 582) steep.

Further, the communication portion 540 is provided at the lower end position (the end points 581B to 583B) of the first to third sections 581 to 583, so that the drain that has flowed through the sections 581 to 583 passes through the communication section 540 and the inner groove portion 56. All flow into. For this reason, it is possible to prevent the drain from staying in the outer groove portion 58 for a long time.

In addition, the indoor unit of the air conditioning apparatus of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

In the outdoor unit 2 of the above-described embodiment, the communication unit 540 is disposed at a position (a corner portion of the indoor unit 2) that is displaced from the front position of the opening 25 in the horizontal direction. However, the arrangement position of the communication part 540 is not limited to this position. For example, the communication part 540 may be provided at the front position of the opening 25 in the horizontal direction. In this case, the communication portion 540 is provided at a position below the opening 25. As a result, the flow rate of air flowing from the primary side region to the secondary side region through the communication portion 540 can be suppressed, and the scattering of the drain to the outside due to the air flow can be suppressed.

Further, in the outdoor unit 2 of the above-described embodiment, the communication portion 540 is provided only at the lowest positions 581B to 584B of the bottom of the outer groove portion 58 (each section 581 to 584), but is not limited to this configuration. . In addition to the lowest position, the communication part 540 may be provided at an intermediate position in the height direction. Even in such a position, the drain flowing through the outer groove portion 58 can flow into the inner groove portion 56 through the communication portion 540, and the distance through which the drain flows in the outer groove portion 58 can be shortened.

Further, in the outdoor unit 2 of the above embodiment, the inclination angle of the bottom of each section 581 to 584 changes in the middle of the length direction, but is not limited to this configuration. In each of the sections 581 to 584, the inclination angle of the bottom may be constant from the start end 581A to 584A to the end end 581B to 584B.

In the outdoor unit 2 of the above embodiment, four (plural) communication portions 540 are provided, but the configuration is not limited to this. The outer groove portion 58 may not be partitioned (separated), and one communication portion 540 may be provided at the most downstream end (terminal) of the inner groove portion 56 or the outer groove portion 58. That is, the inner groove portion 56 and the outer groove portion 58 may communicate with each other only in the vicinity of the position where the drain pump 60 is disposed.

Further, the communication part 540 may not be provided. In this case, drain pumps 60 are provided at the end of the inner groove 56 and the end of the outer groove 58, respectively.

Further, the indoor unit 2 of the above embodiment is a ceiling hanging type, but may be a ceiling embedded type (so-called cassette type) indoor unit. That is, in the indoor unit 2 of the above embodiment, the air outlet 25 is formed on the side surface, but the air outlet may be formed on the bottom surface.

In a ceiling-embedded indoor unit, a partition wall 54 is provided in the drain receiving portion 52 to form an inner groove portion 56 and an outer groove portion 58, and the inclination angle of the bottom portion of the outer groove portion 58 is larger than the inclination angle of the bottom portion of the inner groove portion 56. To do. Thereby, it is possible to reliably prevent the water level in the secondary region (outer groove portion 58) from rising in the drain receiving portion 52. Further, the drain received by the outer groove portion 58 is quickly flowed to the drain pump 60 side to shorten the time that the drain stays in the secondary side region (outer groove portion 58), so that the drain is scattered outside the indoor unit. Can be prevented.

Moreover, although the indoor unit 2 of the said embodiment blows off a wind in four directions, it is not limited to this structure. The indoor unit may blow wind in two directions or may blow wind in one direction.

Moreover, although the indoor unit 2 of the said embodiment is used for the air conditioning apparatus 1 which performs both air_conditionaing | cooling operation and heating operation, it is not limited to this structure. The indoor unit may be used in an air conditioner dedicated to cooling, or may be used in an air conditioner dedicated to heating.
[Outline of the embodiment]

The above embodiment is summarized as follows.

That is, the indoor unit of the air conditioning apparatus of the above embodiment includes a heat exchanger, a drain pan disposed below the heat exchanger, and a drain pump that discharges water accumulated in the drain pan to the outside. . The drain pan extends along the heat exchanger, and receives the water generated on the surface of the heat exchanger below the heat exchanger, and the heat exchanger from below. An inner groove that is erected so as to abut and that receives the water in an upstream region in the air flow by partitioning the drain receiving portion into an upstream region and a downstream region in the air flow; and And a partition wall that forms an outer groove that receives the water in a downstream region of the air flow. The bottom part of the outer groove part and the bottom part of the inner groove part each have an inclination that becomes a downward slope so that the water flows toward the drain pump. The average inclination angle at the bottom of the outer groove is larger than the inclination at the bottom of the inner groove.

According to this configuration, by providing the partition wall, the primary region (the upstream region in the air flow blown from the indoor unit) and the secondary region (the downstream in the air flow) are provided. It is possible to prevent the drain (water from the heat exchanger) of the drain receiving portion from moving to the secondary side region (that is, moving from the inner groove portion to the outer groove portion) due to the pressure difference with the side region. Thereby, it can prevent reliably that the water level of the area | region (outer groove part) of a secondary side rises in a drain receiving part. In addition, by providing the partition wall, the bottom of the outer groove can be steeper than the bottom of the inner groove, so that the water (drain) received by the outer groove can flow quickly to the drain pump side. Can be shortened in the secondary region (outer groove portion). As a result, the drain can be effectively prevented from scattering outside the indoor unit.

Moreover, in the indoor unit of the air conditioning apparatus of the above embodiment, the partition wall may have one or a plurality of communicating portions that communicate the outer groove portion and the inner groove portion. The height position of the bottom portion of the outer groove portion at the position of the communication portion may be the same as or higher than the height position of the bottom portion of the inner groove portion at the position of the communication portion. The communication portion may be arranged at a position shifted from a front position of the air outlet in the indoor unit.

According to such a configuration, the drain flowing through the outer groove portion can flow into the inner groove portion through the communication portion on the way to the drain pump. For this reason, the time during which the drain stays in the outer groove portion becomes shorter, and as a result, the drain in the outer groove portion can be more reliably prevented from scattering outside the indoor unit. Specifically, at the position where the communication portion is provided, the height position of the bottom portion of the outer groove portion is the same as or higher than the height position of the bottom portion of the inner groove portion. For this reason, when the drain which flows through an outer groove part arrives at the position of a communicating part, it flows into an inner groove part from an outer groove part through a communicating part. As a result, the distance that the drain flows through the outer groove is shortened, and the time that the drain is in the outer groove is shortened.

And since the communication part is provided in the position shifted from the front position of the blower outlet of an indoor unit, compared with the case where it is provided in the front position, until the air which passed through the communication part is blown out from the blower outlet The pressure loss increases. Thereby, the flow volume of the air which blows off from the area | region of a primary side to the area | region of a secondary side through a communicating part is suppressed. For this reason, scattering of the drain to the exterior of the indoor unit in the outer groove part and communication part by this air flow is suppressed.

Further, in the indoor unit of the air conditioner of the above embodiment, the outer groove portion may be partitioned into a plurality of sections in the longitudinal direction. The communication portion may be disposed at a lower end position at which the bottom portion is lowest in each section of the outer groove portion.

Thus, by shortening the distance that the drain can flow in the outer groove portion and shortening the time that the drain stays in the outer groove portion, it is possible to more reliably prevent the drain from scattering from the outer groove portion to the outside of the indoor unit. be able to.

Moreover, by dividing the outer groove portion into a plurality of sections, it is possible to provide a saw-toothed arrangement in which a height difference is provided between the end of the upstream section and the start of the downstream section in the adjacent sections. Thereby, the thickness of a drain pan can also be suppressed, making the inclination of the bottom part of an outer groove part (each section) steep.

Also, since the communication portion is provided at the lower end position in each section, all the drain that has flowed through each section flows into the inner groove portion through this communication portion. For this reason, it is possible to prevent the drain from staying in the outer groove portion for a long time.

Moreover, in the indoor unit of the air conditioning apparatus of the above embodiment, the partition wall may have one or a plurality of communication portions that communicate the outer groove portion and the inner groove portion. The outer groove portion may be partitioned into a plurality of sections in the longitudinal direction. The height position of the bottom part of the outer groove part at the position of the communication part may be the same as or higher than the height position of the bottom part of the inner groove part at the position of the communication part. The communication portion may be disposed at a lower end position at which the bottom portion is lowest in each section of the outer groove portion.

According to such a configuration, the distance that the drain can flow in the outer groove portion is shortened, and the time that the drain stays in the outer groove portion is shortened, so that the drain is more reliably scattered from the outer groove portion to the outside of the indoor unit. Can be prevented.

In the indoor unit of the air conditioner of the above embodiment, when the communication portion is provided in the partition wall, the bottom portion of the outer groove portion descends from the outer groove portion toward the inner groove portion at the position of the communication portion. You may have the inclination used as a gradient.

According to such a configuration, the drain that has flowed through the outer groove portion (each section) surely flows into the inner groove portion through the communication portion.

Moreover, the indoor unit of the air conditioning apparatus of the above embodiment may include a blower that blows out air that has been sucked in from the lower side, and one or a plurality of air outlets that blow out the air to the outside. The said heat exchanger may be arrange | positioned so that the said air blower may be enclosed from a horizontal direction so that it may become a substantially square shape in planar view. The said blower outlet may be provided in the position corresponding to each said substantially square edge | side on the opposite side to the said air blower on both sides of the said heat exchanger. The communication portion may be disposed at a position corresponding to the substantially rectangular corner portion.

The present invention can be used as an indoor unit of an air conditioner.

1 Air Conditioner 2 Indoor Unit 10 Indoor Heat Exchanger (Heat Exchanger)
25 Outlet 27 Blower 33 Suction Port 50 Drain Pan 52 Drain Receiving Portion 54 Partition Wall 540 Communication Portion 56 Inner Groove 56a Inner Groove Bottom 58 Outer Groove 581 First Section 582 Second Section 583 Third Section 584 Fourth Section 60 Drain Pump

Claims

A heat exchanger,
A drain pan disposed below the heat exchanger;
A drain pump for discharging water accumulated in the drain pan to the outside,
The drain pan is
A drain receiver that extends along the heat exchanger and receives the water generated on the surface of the heat exchanger below the heat exchanger;
The water is erected so as to come into contact with the heat exchanger from below, and the water inside the drain receiving part is divided into an upstream region and a downstream region in the air flow, thereby allowing the water to flow upstream in the air flow. An inner groove portion that receives the water in the region, and a partition wall that forms an outer groove portion that receives the water in the downstream region of the air flow,
The bottom portion of the outer groove portion and the bottom portion of the inner groove portion each have an inclination that becomes a downward slope so that the water flows toward the drain pump,
An indoor unit of an air conditioner, wherein an inclination angle at a bottom portion of the outer groove portion is larger than an inclination angle at a bottom portion of the inner groove portion.
The partition wall has one or a plurality of communicating portions that communicate the outer groove portion and the inner groove portion,
The height position of the bottom portion of the outer groove portion at the position of the communication portion is the same as or higher than the height position of the bottom portion of the inner groove portion at the position of the communication portion,
The indoor unit of an air conditioner according to claim 1, wherein the communication unit is disposed at a position shifted from a front position of the air outlet of the indoor unit.
The outer groove is partitioned into a plurality of sections in the longitudinal direction,
The indoor unit of an air conditioner according to claim 2, wherein the communication portion is disposed at a lower end position at which the bottom portion is lowest in each section of the outer groove portion.
The partition wall has one or a plurality of communicating portions that communicate the outer groove portion and the inner groove portion,
The outer groove is partitioned into a plurality of sections in the longitudinal direction,
The height position of the bottom portion of the outer groove portion at the position of the communication portion is the same as or higher than the height position of the bottom portion of the inner groove portion at the position of the communication portion,
The indoor unit of an air conditioner according to claim 1, wherein the communication part is disposed at a lower end position where the bottom part is lowest in each section of the outer groove part.
The air conditioning according to any one of claims 2 to 4, wherein the bottom portion of the outer groove portion has an inclination that becomes a downward gradient from the outer groove portion toward the inner groove portion at the position of the communication portion. Equipment indoor unit.
A blower that blows out the air sucked from the lower side,
One or a plurality of air outlets for blowing out the air to the outside,
The heat exchanger is arranged so as to surround the blower from the horizontal direction so as to be substantially rectangular when viewed from above.
The air outlet is provided at a position corresponding to each side of the substantially square on the opposite side of the blower across the heat exchanger,
The indoor unit of an air conditioning apparatus according to any one of claims 2 to 5, wherein the communication portion is disposed at a position corresponding to the substantially rectangular corner portion.