JP2010096481A - Indoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor unit for an air conditioner improving performance by uniforming draft resistance. <P>SOLUTION: The indoor unit 10 for an air conditioner is equipped in an indoor unit body 1 used as a casing with a blower 12, and a heat exchanger 9 composed of a front side heat exchange part 9A and a rear side heat exchange part 9B and disposed to surround the blower 12. In an upper side of the front side heat exchange part 9A, heat transfer tubes B are provided in radiation fins A in three rows along a passing direction of heat exchange air being a width direction of the radiation fins A and in plural stages along a longitudinal direction of the radiation fins A, in a lower side of the front side heat exchange part 9A, the heat transfer tubes B are provided in the radiation fins A in two rows along the passing direction of the heat exchange air and in plural stages along the longitudinal direction of the radiation fins A, and an interval between the heat transfer tube B of a lowermost part of a first row in the most upwind side of a third row part of the front side heat exchange part 9A and the heat transfer tube B of the uppermost part of the first row of a second row part, and an interval between the heat transfer tube B of the lowermost part of a third row of the most upwind side of a third row part of the front side heat exchange part 9A and the heat transfer tube B of the uppermost part of a second row of a downwind side of a second row part are provided smaller than an interval between the heat transfer tubes B adjacent in a stage direction in the third row part and the second row part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an indoor unit of an air conditioner.

  2. Description of the Related Art An indoor unit of an air conditioner is known that includes a blower and a heat exchanger disposed so as to surround the blower in a housing formed of an indoor unit body.

  The indoor unit main body includes a front surface portion that is curved when viewed from the side, and a flat plate-shaped upper surface portion, lower surface portion, left surface portion, and right surface portion. An upper surface suction port is provided on the upper surface of the indoor unit main body. A front suction port is provided in the front part. A blower outlet is provided along the lower side of the front suction port. A grill is fitted into the upper surface inlet and is always open.

  A flat panel is attached to the front suction port so that it can be opened and closed. The flat panel is composed of a plate-like member that is curved from the upper end to the lower end. Note that no opening is formed in the flat panel.

  The heat exchanger includes heat radiating fins composed of a plurality of fins and a plurality of heat transfer tubes provided so as to penetrate the plurality of fins. The heat exchanger includes a front heat exchanger portion disposed in front of the housing and a rear heat exchanger portion disposed in the rear upper portion of the housing, and is configured in a substantially inverted V shape in a side view. . The heat transfer tubes are arranged in a plurality of rows and stages.

  In such a heat exchanger, three rows of heat transfer tubes are arranged along the flow direction of the heat exchange air in the upper portion of the heat exchanger, and two rows of heat transfer tubes are arranged in the lower portion of the heat exchanger. An adjacent portion between the row portion and the second row portion is known in which only one heat transfer tube in the center row of the third row portion and only one heat transfer tube on the windward side in the second row portion are arranged adjacent to each other ( For example, see Patent Document 1).

Also, in the heat exchanger, the upwind leading edge and the leeward trailing edge each have the same obtuse angle, and a single curvilinear portion connecting between the two straight line portions. What is comprised is known (for example, refer patent document 2).
JP 2006-162183 A Japanese Patent Laid-Open No. 2006-97953

  However, the above technique has the following problems. That is, the adjacent portion between the third row portion and the second row portion is adjacent when only one heat transfer tube in the center row of the third row portion and one heat transfer tube on the windward side in the second row portion are arranged adjacent to each other. There is a problem in that the ventilation resistance is reduced in the part compared to the other parts, so that the wind is concentrated and the performance is deteriorated.

  In addition, the heat of the structure in which the windward leading edge and the leeward trailing edge are formed in a square shape by two straight portions having the same obtuse angle and one curved portion connecting the two straight portions. In the case of an exchanger, there is a problem that a molding defect is likely to occur when the position is shifted during fin molding from the viewpoint of manufacturing. That is, it is slippery when the heat exchanger is molded or transported, and there is a risk of falling with a slight deviation when it is stacked and transported. In terms of reliability, since the angle changes more greatly than the curved portion, there is a problem that drain water generated during cooling particularly on the front side may be scattered outside the heat exchanger at the curved portion.

  The present invention has been made in consideration of the above circumstances, and has an object to make the ventilation resistance uniform and improve the performance.

  An indoor unit of an air conditioner according to an aspect of the present invention includes a blower, a front heat exchanger unit, and a rear heat exchanger unit in a casing, and has a substantially inverted V shape in side view. An air conditioner indoor unit having a heat exchanger disposed so as to surround the heat exchanger tube, the upper side of the front heat exchanger section is a heat in which the heat transfer tube is in the width direction of the heat dissipating fin. Three rows are provided along the flow direction of the exchange air, and a plurality of stages are provided along the longitudinal direction of the radiating fin, and the lower side of the front heat exchanger section is provided with a heat transfer tube on the radiating fin. 2 rows along the flow direction, and a plurality of stages along the longitudinal direction of the radiating fin, and the lowermost heat transfer tube in the first row on the windward side of the third row portion of the front heat exchanger portion and 2 The distance from the uppermost heat transfer tube in the first row on the windward side of the row, and the front heat exchange At least one of the intervals between the lowermost heat transfer tube in the third row on the windward side of the third row portion and the uppermost heat transfer tube in the second row on the leeward side of the second row portion, It is characterized in that it is smaller than the interval between the heat transfer tubes adjacent in the step direction in the section and the two rows.

  According to the present invention, it is possible to make the ventilation resistance uniform and improve the performance.

  A first embodiment of the present invention will be described below with reference to FIGS. In the figure, arrows X, Y, and Z indicate three orthogonal directions. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively.

  As shown in FIG. 1, the indoor unit 10 includes an indoor unit main body 1 including a casing composed of a front plate 1A and a rear main body 1B. The indoor unit main body 1 includes a front surface portion that is curved and formed in a side view, and a flat upper surface portion, a lower surface portion, a left surface portion, and a right surface portion.

  An upper surface suction port 2 is provided in the upper surface portion 1 of the indoor unit body 1. A front suction port 3 is provided in the front part. A blower outlet 4 is provided along the lower side of the front suction port 3. A grill 5 is fitted into the upper surface suction port 2 and is always open.

  A flat panel 6 is attached to the front suction port 3 so as to be openable and closable. The flat panel 6 is composed of a plate-like member that is curved from the upper end to the lower end. A link type opening / closing mechanism K that is driven by a drive source (not shown) is attached to the back side (back side) of the flat panel 6. This drive source is electrically connected to a control unit (control means) S, and the position and orientation of the flat panel 6 are controlled by the control unit S. The flat panel 6 has no opening.

  Horizontal louvers 7 and 8 extending in the X direction are attached to the air outlet 4 in parallel in the vertical direction.

  Inside the indoor unit main body 1, a heat exchanger 9 in which a front heat exchanger portion 9A and a rear heat exchanger portion 9B are formed in an inverted V shape is disposed. The heat exchanger 9 is installed so as to surround the blower 12.

  The front heat exchanger section 9A is formed to be curved substantially parallel to a portion extending from the front surface portion of the indoor unit body 1 to a part of the upper surface portion, and is disposed to face the space with a predetermined gap.

  The rear heat exchanger portion 9B extends linearly in a side view, is inclined obliquely so that the front is positioned upward, and is disposed opposite to the upper surface suction port 2.

  An electric dust collector 11 is attached to the front surface of the front heat exchanger portion 9 </ b> A of the heat exchanger 9. The electric dust collector 11 is electrically connected to the control unit S. The electric dust collector 11 is configured to perform an original dust collecting operation and to be operable as an ozone generator.

  A blower 12 is disposed between the front heat exchanger section 9A and the rear heat exchanger section 9B and facing the outlet 4. The blower 12 is configured to include a cross-flow blower that has an axial dimension substantially the same as the width dimension of the heat exchanger 9 along the X direction and is disposed to face the heat exchanger 9, and a blower motor. Are electrically connected to the control unit S.

  The lower end portion of the front heat exchanger portion 9A is placed on the front drain pan 13a, and the lower end portion of the rear heat exchanger portion 9B is placed on the rear drain pan 13b formed integrally with the rear main body 1B. These drain pans 13a and 13b receive drain water dripped from the respective heat exchanger portions 9A and 9B, and can drain the water through a drain hose (not shown).

  In a position close to the front and rear drain pans 13 a and 13 b, a separation member 14 that forms a nose for the blower of the indoor blower 12 and extends to the blowout port 4 is provided.

  A space surrounded by the isolation member 14 and the rear main body 1 </ b> B becomes a part of the air passage 15 that communicates the nose and the outlet 4. That is, as the blower 12 is driven, a blower passage 15 through which room air is guided from the upper surface inlet 2 and the front inlet 3 to the outlet 4 is formed in the indoor unit body 1.

  The heat exchanger 9 and the electrostatic precipitator 11 are disposed in the middle of the air passage 15, and a vertical louver unit (not shown) is provided in the vicinity of the air outlet 4, which is the end of the air passage 15.

  2 and 3 show a heat exchanger 9 of the present invention. The heat exchanger 9 is provided in a plurality of radiation fins A that are stacked in parallel in the width direction along the X direction with a predetermined interval therebetween, and in which the heat exchange air flows in the gaps between the heat exchangers 9 and the radiation fins A. And a plurality of heat transfer tubes B that are respectively inserted into the plurality of heat transfer tube insertion holes and through which the heat exchange medium is conducted. That is, the heat transfer tube B extending in the X direction is disposed so as to penetrate through the heat transfer tube insertion holes formed in the plurality of heat radiation fins A stacked in the X direction.

Since the heat exchanger 9 has a large amount of air sucked from above due to the wind speed distribution specific to the casing of the indoor unit body 1 using the flat panel 6, the upper side and the rear side of the front side heat exchanger 9 </ b> A, that is, the upper side of the fan 12. The number of rows of the heat transfer tubes B along the flow direction of the heat exchange air, which is the width direction of the radiating fins A of the side heat exchanger section 9B, is three, and the heat transfer on the front side of the blower 12, that is, the lower portion of the front heat exchanger section 9A. The number of rows of heat tubes B is arranged in two rows. The heat transfer tubes 22 are arranged in a plurality of stages along the longitudinal direction of the radiating fins A. The heat transfer tube at the outlet for heating is arranged on the most windward side. Hereinafter, a portion arranged in three rows is a three-row portion, and a portion arranged in two rows is a two-row portion. Also,
As shown in FIG. 2, the heat transfer tubes B are arranged in a staggered manner in the three rows, and are arranged in a parallelogram shape in the two rows. Further, the heat transfer tubes B are arranged irregularly between the third row portion and the second row portion and at the end of the rear heat exchanger 9B.

  In FIG. 3, the refrigerant | coolant flow path in the heat exchanger 9 is shown. Generally, since the temperature difference with air is the smallest on the outlet side of the heat transfer tube B during heating operation, the heat transfer tube B constituting the outlet tube is often arranged in the first row on the windward side, and this embodiment The heat exchanger 9 according to the embodiment is also arranged as such.

  FIG. 3 shows the refrigerant flow path during cooling. Since the pressure loss in the pipe increases as it becomes the cooling outlet, a large diameter is used on the refrigerant outlet side. The third row portion has a small diameter, and the second row portion has a large diameter.

  That is, if the diameter of the heat transfer tube B in the third row portion is d1, and the diameter of the heat transfer tube B in the second row portion is d2, d1 <d2.

  Further, the expansion valve 16 at the place connecting the third row portion and the second row portion is used during the reheat dehumidification cycle, and at the time of reheat dehumidification, the third row side becomes the overheating portion and the second row side becomes the dehumidification portion.

  For this reason, even if the 3rd row portion and the 2nd row portion are independent pipes, they are regularly arranged. In addition, the irregular arrangement | sequence for adjusting the malfunction of an arrangement | sequence is desirable about the adjacent part and edge part of 3 row | line | column parts and 2 row | line parts.

  According to the indoor unit 10 of the air conditioner according to the present embodiment, the following effects can be obtained. That is, by setting a large diameter on the cooling outlet side with a large pressure loss, it is possible to make the ventilation resistance uniform and improve the performance.

[Second Embodiment]
A second embodiment of the present invention will be described below with reference to FIGS. In the figure, arrows X, Y, and Z indicate three orthogonal directions. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively. Since it is the same as that of the said 1st Embodiment except the space | interval setting of the heat exchanger tube B, description about a common part is abbreviate | omitted.

  In the heat exchanger 9 according to the present embodiment, a three-row structure (three-row portion) is provided above the blower 12, and a front side of the blower 12 is a two-row structure (two-row portion).

  Moreover, about the space | interval of the heat exchanger tubes B, as shown in FIG. 3, the space | interval between the 3rd row | line | column part and 2nd row | line part in the most windward row | line | column is L1, the 3rd row | line part and 2nd row | line part on the most leeward side Is L2, the interval between the heat transfer tubes B in the third row portion is L3, and the interval between the heat transfer tubes B in the second row portion is L4, L1 <L3 and L4 are satisfied and L2 <L3 and L4 are satisfied Set to dimensions.

  That is, the distance between the lowermost heat transfer tube B in the first row on the windward side of the third row portion and the uppermost heat transfer tube B in the first row on the windward side of the second row portion, and 3 of the front heat exchanger portion. The distance between the lowermost heat transfer tube B in the third row on the windward side of the row portion and the uppermost heat transfer tube B in the second row on the leeward side of the second row portion is stepwise in the third row portion and the second row portion. Is set smaller than the interval between adjacent heat transfer tubes.

  As shown in FIG. 4, the wind speed distribution is indicated by an arrow, and the air volume is increased at a location where the third row portion and the second row portion are adjacent to each other. This part is a boundary between the superheated part and the dehumidified part at the time of reheat dehumidification, and it is a place where it is not preferable to increase the air volume. By setting the interval between the heat transfer tubes B described above, by making the most upwind on the third row side, the second row upwind, and the most leeward side on the third row side and the second row leeward smaller than the interval between the surrounding heat transfer tubes, Ventilation resistance increases, making it difficult for the wind to flow.

  According to the heat exchanger 9 according to the present embodiment, in addition to the above-described effects, an increase in the air volume at the boundary between the overheated part and the dehumidifying part can be prevented, and the performance can be improved. In addition, the space | interval of the lowest heat exchanger tube B of the 1st row | line of the 3rd row | line | column and the uppermost heat transfer tube B of the 1st row | line | column of the 2nd row | line | column part, and 3 of a front side heat exchanger part The distance between the bottommost heat transfer tube B in the third row on the furthest wind side of the row portion and the uppermost heat transfer tube B in the second row on the leeward side of the second row portion is both in the third row portion and the second row portion. It is preferable to set it smaller than the interval between the heat transfer tubes adjacent in the step direction, but only one of the intervals is made smaller than the interval between the heat transfer tubes adjacent in the step direction in the third row portion and the second row portion. Also good.

[Third Embodiment]
A third embodiment of the present invention will be described below with reference to FIG. In the figure, arrows X, Y, and Z indicate three orthogonal directions. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. In this embodiment, since it is the same as that of the said 1st or 2nd embodiment except the point which provides the cutting part C, description about a common part is abbreviate | omitted.

  In the heat exchanger 9 according to the present embodiment, in the space adjacent to the third row portion and the second row portion, drain water is guided from between the second row and the third row of the third row portion to the first and second rows of the second row portion. Cut or raise or cut part C is formed. FIG. 5 shows the case where the cut and raised C is formed.

  The cut and raised C is configured by cutting the heat radiating fin A over a predetermined distance along the longitudinal direction of the fin A, forming a cut through the thickness direction, and bending and standing up in the thickness direction.

  As the operation of the present invention is shown in FIG. 5, the present heat exchanger 9 is a three-row portion having an upper portion composed of three rows, so that the amount of dehumidification during the cooling operation is larger on the upper side. When all the drain water generated in the three rows flows down in the same direction, it becomes a factor of drain scattering and deterioration of ventilation resistance.

  In the heat exchanger 9 according to the present embodiment, the drainage or cutting portion C that guides drain water is provided between the second and third rows of the third row portion and between the first and second rows of the second row portion. Disperses water and suppresses scattering of drain and deterioration of ventilation resistance.

  According to the heat exchanger 9 according to the present embodiment, in addition to the above-described effects, it is possible to further disperse the drain water and suppress the scattering of the drain and the deterioration of the ventilation resistance.

[Fourth Embodiment]
A fourth embodiment of the present invention will be described below with reference to FIG. In the figure, arrows X, Y, and Z indicate three orthogonal directions. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. In this embodiment, since it is the same as that of the said 1st or 2nd embodiment except the arrangement | sequence of the heat exchanger tube B in the edge part of the heat exchanger 9, description about a common part is abbreviate | omitted.

  In the heat exchanger 9 according to the present embodiment, the end of the three rows of the rear heat exchanger 9B has a longitudinal endmost one heat transfer tube (B1) and a second array (B2, B3). , B4) are arranged so as to overlap the air flow direction which is the width direction of the fin A. That is, one heat transfer tube B1 is disposed at the lowermost end, and the second heat exchanger tube B2, B3, and B4 are juxtaposed in the width direction.

  As shown in FIG. 6, since the rear side ends of the heat exchangers 9A and 9B are in the drain pans 13a and 13b, the wind hardly flows, but by arranging the heat transfer tube B as described above, the drain pan 13a, In the vicinity of 13b, the ventilation resistance of the heat exchanger can be lowered. For this reason, a performance improvement can be aimed at by wrapping in a wind.

  According to the heat exchanger 9 concerning this embodiment, in addition to the said effect, a further favorable ventilation resistance can be obtained and it becomes possible to improve performance.

[Fifth Embodiment]
The fifth embodiment of the present invention will be described below with reference to FIGS. In the figure, arrows X, Y, and Z indicate three orthogonal directions. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. In addition, since it is the same as that of the said 4th Embodiment except the point which formed the notch D, description of a common part is abbreviate | omitted.

  As shown in FIG. 7, the heat exchanger 9 according to this embodiment includes a front heat exchanger 9 </ b> A that is a main heat exchange and a rear heat exchanger 9 </ b> B that is an auxiliary heat exchange.

  The front heat exchanger 9A has a curved portion in which both ends extend linearly and a central portion is curved, and is formed in an arc shape. Moreover, the notch D is formed in the center curve part. The notch D is provided at the rear, which is the downstream side (downstream side) in the air flow direction.

  That is, the shape of the outer edge of the end portion in the width direction of the fin A is discontinuous, and is cut out so that the end portion is recessed in the curved portion that is the head in the feed direction shown in FIG.

  Further, as shown in FIG. 7, the heat transfer tubes B are more on the upper side of the blower 12 than on the front side of the blower 12 in order to correspond to the wind speed distribution unique to the casing (shown in FIG. 1 and the like) using the flat panel 6. Arranged in the number of columns.

  Generally, when the number of rows of the heat transfer tubes B on the upper side of the blower 12 and the number of rows of the heat transfer tubes B on the lower side of the blower 12 are configured with different numbers of rows, the area of the fin A is higher on the upper side of the blower 12. growing.

  At the time of press molding of such a heat radiating fin A, as shown in FIG. At this time, if the left and right balances of the fins are poor, there is a case where a deviation tends to occur in the feed direction.

  When the fin A in the heat exchanger 9 according to the present embodiment is formed and fed in the width direction, the notch D is formed in the central curved portion that is the top in the feed direction of the fin. Can be tolerated.

  In addition, after the heat transfer tubes B and the fins A are formed in close contact, even if the weight balance is deteriorated due to the difference in the number of heat transfer tubes B, the notches D are formed so that they can be caught. It becomes possible to prevent the fall. In addition, when the fins A are stacked and transported or stored, the cutouts D can prevent boiling and improve the take-out property.

  According to the heat exchanger 9 according to the present embodiment, in addition to the above-described effects, an effect that the handling of the fin A during molding, transportation, and the like becomes easy can be obtained.

[Sixth Embodiment]
The sixth embodiment of the present invention will be described below with reference to FIG. In the figure, arrows X, Y, and Z indicate three orthogonal directions. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. Except for the point that the notches are formed at the front and rear ends, the fifth embodiment is the same as the fifth embodiment, and the description of the common parts is omitted.

  As shown in FIG. 9, the heat exchanger 9 according to this embodiment includes a front heat exchanger 9 </ b> A that is a main heat exchange and a rear heat exchanger 9 </ b> B that is an auxiliary heat exchange.

  The front heat exchanger 9A has a curved portion in which both ends extend linearly and a central portion is curved, and is formed in an arc shape. Further, notches D and E are formed at both front and rear edges at the central bent portion. That is, a notch is formed in the front, which is the windward side, in addition to the rear, which is the downstream side (downwind side) in the air flow direction. Due to the notches D and E, the outer edge shape of both ends in the width direction of the fin A is discontinuous, and the edge is notched in the bent portion so as to be recessed.

  The front notch E is configured in a straight line. That is, the outer edge of the notch E has a step that is recessed in the width direction, and this recessed portion is configured in a straight line that forms an angle downward with respect to the outer edge at the top of the heat exchanger 9A.

  As shown in FIG. 9, in the heat exchanger 9 of the present embodiment, the drain water that has flowed down from the upwind where the drain water is generated and flows down from the upper side during cooling, flows along the end surface of the fin A. Since the flow direction of the drain water can be changed by the notch E, scattering to the outside of the heat exchanger can be prevented.

  That is, generally, the drain water that has flowed down at the curved portion of the heat exchanger 9 may not bend and may splash outside the heat exchanger 9, but according to the present embodiment, the drain water is guided by the notch. It is possible to prevent scattering.

  According to the heat exchanger 9 according to the present embodiment, in addition to the above-described effects, there is an effect that it is possible to prevent the drain water from being scattered.

[Seventh Embodiment]
A seventh embodiment of the present invention will be described below with reference to FIG. In the figure, arrows X, Y, and Z indicate three orthogonal directions. The X axis is along the width direction of the indoor unit 10, and the Y axis and the Z axis are along the front-rear direction and the up-down direction, respectively. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. In addition, since it is the same as that of the said 6th Embodiment except the point which comprised the front notch E by the some straight line, description of a common part is abbreviate | omitted.

  As shown in FIG. 10, in the heat exchanger 9 according to this embodiment, a front heat exchanger 9A that is a main heat exchange and a rear heat exchanger 9B that is an auxiliary heat exchange are integrated. Further, notches D and E are formed at both front and rear edges near the apex of the central curved portion.

  That is, the shape of the both ends in the width direction of the fin A is discontinuous, and the bent portion is cut out so that the edge is recessed. Due to the notches D and E, the dimension in the width direction of the curved portion of the radiating fin A is reduced. The rear notch D is formed by a plurality of straight lines. That is, the outer edge shape of the fin A in the notch D portion has a step that is recessed in the width direction, and the recessed portion is curved.

  As shown in FIG. 10, since the curved portion is in the vicinity of the multi-row portion in the vicinity of the blower 12, the wind speed is high. For this reason, the area | region (dead water area) where a wind does not flow is formed behind the heat exchanger tube of this location. This dead water area tends to cause blowing noise.

  In the heat exchanger 9 according to this embodiment in which the notch D is formed as described above, the shape of the fin A is changed to that of the heat transfer tube B by installing the rear notch D having a plurality of straight portions. As a configuration suitable for the arrangement, it is possible to prevent the generation of dead water areas.

  According to the heat exchanger 9 which concerns on this embodiment, in addition to the above-mentioned effect, the effect of preventing the production | generation of a dead water area and preventing ventilation noise is acquired further.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.

  For example, although the cut and raised C is shown in the above-described embodiment, a cutting portion that simply forms a cut is also applicable.

  Furthermore, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

Explanatory drawing which shows the structure of the indoor unit of the air conditioner which concerns on 1st Embodiment of this invention. The side view which shows the heat exchanger of the indoor unit. The side view which shows the structure and effect | action of the same heat exchanger. The side view which shows the structure of the heat exchanger which concerns on 2nd and 3rd embodiment of this invention. The side view which shows the structure of the heat exchanger which concerns on 3rd Embodiment of this invention. The side view which shows the structure of the heat exchanger which concerns on 4th Embodiment of this invention. The side view which shows the structure of the heat exchanger which concerns on 5th Embodiment of this invention. Explanatory drawing which shows the structure at the time of shaping | molding of the heat exchanger which concerns on the same embodiment. The side view which shows the structure of the heat exchanger which concerns on 6th Embodiment of this invention. The side view which shows the structure of the heat exchanger which concerns on 7th Embodiment of this invention.

Explanation of symbols

A ... radiation fin, B ... heat transfer tube, C ... cut and raise, D, E ... notch, 1A ... front plate,
1B: Rear body, 1 ... Indoor unit body, 3 ... Front suction port, 4 ... Air outlet, 5 ... Grill,
6 ... Flat panel, 9A ... Front heat exchanger part, 9B ... Rear heat exchanger part, 9 ... Heat exchanger,
DESCRIPTION OF SYMBOLS 10 ... Indoor unit, 11 ... Electric dust collector, 12 ... Blower, 12 ... Indoor fan,
13a ... Front drain pan, 13b ... Rear drain pan, 14 ... Isolation member, 15 ... Air blowing path,
16 ... Expansion valve.

Claims (5)

In the housing, a fan, and a heat exchanger that is configured to include a front heat exchanger part and a rear heat exchanger part, have a substantially inverted V shape in a side view, and are arranged so as to surround the fan. In air conditioner indoor units,
The upper side of the front heat exchanger section has three rows along the flow direction of the heat exchange air in which the heat transfer tubes and the heat dissipating fins are in the width direction of the heat dissipating fins. The lower side of the front heat exchanger section is provided with two rows of heat transfer tubes along the flow direction of the heat exchange air and a plurality of steps along the longitudinal direction of the heat dissipation fins. ,
The distance between the lowermost heat transfer tube in the first row on the windward side in the three rows of the front heat exchanger portion and the uppermost heat transfer tube in the first row on the windward side in the second row, and the front heat exchange At least one of the intervals between the lowermost heat transfer tube in the third row on the windward side of the third row portion and the uppermost heat transfer tube in the second row on the leeward side of the second row portion, The indoor unit of the air conditioner characterized in that it is smaller than the interval between the heat transfer tubes adjacent in the step direction in the section and the two rows.   Cut the drainage fins from the second and third rows of the third row portion to the first and second rows of the second row portion in the heat radiating fins adjacent to the third row portion and the second row portion. The indoor unit for an air conditioner according to claim 1, further comprising a raising or cutting part.   The end of the three rows of the rear heat exchanger is arranged with one heat transfer tube at the lower end in the longitudinal direction, and the second array in the longitudinal direction from the end is the first row, the second row The indoor unit of an air conditioner according to claim 1, wherein the heat transfer tubes in the third row and the third row are arranged so as to overlap each other in the thickness direction of the fins.   The heat transfer tubes on the upper side of the blower are arranged in a larger number of rows than the heat transfer tubes on the front side of the blower, and the heat dissipating fins are arranged in two arcs at both ends and have a substantially arc shape having a curved portion at the center. The indoor unit of the air conditioner according to claim 1, wherein a cutout is provided in the central curved portion.   The notch is formed on the end surface on the leeward side and the end surface on the leeward side, the notch on the leeward side is formed by one straight line, and the notch on the leeward side is formed by a plurality of straight lines. The indoor unit of an air conditioner according to claim 4, wherein the indoor unit is an air conditioner.

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