JP6502208B2 - Indoor unit of air conditioner - Google Patents

Description

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

  The indoor unit of the conventional air conditioner is disclosed by patent document 1. FIG. A cross flow fan and a heat exchanger are housed inside the casing of the indoor unit. The heat exchanger is disposed to surround the upstream side of the cross flow fan. A drain pan is disposed below the heat exchanger. The heat exchanger has a refrigerant pipe extending in the left-right direction, and the refrigerant pipes are juxtaposed at predetermined intervals while bending and meandering at both ends. A large number of vertically extending fins are fixed to the refrigerant pipe.

  Side plates are attached to both ends of the refrigerant pipe. Specifically, a bent portion which is bent at the end of the refrigerant pipe is inserted into the holding hole formed in the side plate. Further, the holding hole is formed with a cylindrical rib that protrudes outward from the peripheral edge, and the bent portion is held in contact with the inside of the rib.

  When the cooling operation is performed, the heat exchanger of the indoor unit operates as an evaporator. The air sucked into the housing from the room is cooled by heat exchange with the fins, and cold air is blown out into the room. When the drawn air passes through the refrigerant pipe, the water vapor contained in the air condenses to generate drain water. The drain water drips on a drain pan and is discharged to the outside through a drain pipe.

JP, 2009-144982, A

  According to the conventional indoor unit, there is a problem that the bent portion is corroded by the drain water accumulated inside the rib holding the bent portion of the refrigerant pipe.

  In order to achieve the above object, according to the present invention, a housing opening a suction port and a blowout port, a cross flow fan disposed horizontally in the housing, and a bent portion extending in the lateral direction and bent at both ends A heat exchanger formed by fixing a plurality of fins on a meandering refrigerant pipe and disposed on the upstream side of the cross flow fan, and standing in the casing to support both ends of the heat exchanger In the indoor unit of an air conditioner provided with a pair of support members, the support member is a long hole shaped holding hole in which the bent portion is fitted, and the bent portion protrudes outward from the periphery of the holding hole And a cylindrical rib to be fitted, and the lower end portion of the rib is open facing downward.

  Further, according to the present invention, in the indoor unit of the air conditioner described above, the rib is provided with a locking claw which protrudes from the inner peripheral surface and locks the inner peripheral portion of the bent portion. .

  Further, the present invention is characterized in that, in the indoor unit of the air conditioner having the above configuration, the fins disposed at both ends of the heat exchanger abut the support member.

  In the indoor unit of an air conditioner according to the present invention, the present invention further comprises a drain pan for collecting drain water of the heat exchanger, the drain pan having end plates supported by the casing at the left and right ends. The support member is placed on the end face plate, and the other is disposed in a step portion provided on at least one of the lower end of the support member and the upper end of the end face plate.

  Further, according to the present invention, in the indoor unit of the air conditioner described above, the filter includes a filter disposed between the suction port and the heat exchanger, and a filter guide that slidably supports the filter. A member extends inward from an upper end and has a sealing portion in contact with the filter guide, and the sealing portion closes a gap between the filter guide and the support member.

  According to the indoor unit of the air conditioner of the present invention, drain water accumulated in the inside of the rib holding the bent portion of the refrigerant pipe can escape from the open lower end portion to prevent corrosion of the refrigerant pipe inside the rib it can.

FIG. 1 is a perspective view of an indoor unit according to a first embodiment of the present invention. The front view of the indoor unit which concerns on 1st Embodiment of this invention. 2. AA sectional view in FIG. FIG. 2 is a perspective view showing the inside of the indoor unit according to the first embodiment of the present invention. The perspective view of the supporting member of the indoor unit which concerns on 1st Embodiment of this invention. The figure which looked the support member of the indoor unit concerning 1st Embodiment of this invention from the left. Front sectional drawing of the supporting member of the indoor unit which concerns on 1st Embodiment of this invention. The perspective view which expands and shows the holding hole formed in the supporting member of the indoor unit which concerns on 1st Embodiment of this invention. Front sectional drawing of the lower end part of the supporting member of the indoor unit which concerns on 1st Embodiment of this invention. The front sectional view showing a part of support member of the indoor unit concerning a 2nd embodiment of the present invention. The perspective view which expands and shows the rib formed in the supporting member of the indoor unit which concerns on 3rd Embodiment of this invention. The perspective view which shows the modification of the rib formed in the supporting member of the indoor unit which concerns on 3rd Embodiment of this invention. The perspective view which expands and shows the rib formed in the supporting member of the indoor unit which concerns on 4th Embodiment of this invention. The upper surface sectional view of the rib formed in the supporting member of the indoor unit concerning a 4th embodiment of the present invention. The perspective view which expands and shows the rib formed in the supporting member of the indoor unit which concerns on 5th Embodiment of this invention. The upper surface sectional view of the rib formed in the supporting member of the indoor unit concerning 5th Embodiment of this invention.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the indoor unit 1 of the separate type air conditioner, and FIG. 2 is a front view of the indoor unit 1. FIG. 3 is a cross-sectional view taken along line A-A in FIG. FIG. 4 is a perspective view showing the inside of the indoor unit 1.

  A compressor, a heat exchanger, a four-way valve, a throttling device, and a fan are installed in the outdoor unit (not shown). The indoor unit and the outdoor unit are connected by a refrigerant pipe to form a refrigeration cycle. In the air conditioner, air conditioning operations such as cooling, heating, and dehumidification are performed.

  The indoor unit 1 includes a horizontally long housing 10, and the suction port 4 is opened in the upper surface of the housing 10, and the blowout port 5 is opened in the lower front of the housing 10. The blowout port 5 is provided with a louver 16 which can freely change the direction of the wind. Further, a front cover 11 is disposed on the front surface of the housing 10, and the front cover 11 can be removed.

  In the inside of the housing 10, an air passage 6 extending from the suction port 4 to the air outlet 5 is formed, and in the air passage 6, a heat exchanger 15 and a cross flow fan 2 are disposed. The heat exchanger 15 is disposed to surround the upstream side of the cross flow fan 2. In addition, a filter 24 is disposed between the suction port 4 and the heat exchanger 15. The filter 24 is slidably supported by the filter guide 20 and faces the suction port 4. A cleaning unit 25 is provided at the upper front of the filter 24.

  The cross flow fan 2 is horizontally disposed in the housing 10 with the rotation axis disposed in the left-right direction. Support members 32 and 33 are provided upright in the housing 10, and one end of the rotation shaft of the cross flow fan 2 is supported by the support member 33 on the left side via a bearing 50 (see FIG. 6). The other end of the rotation shaft of the cross flow fan 2 is connected to a fan motor 51 attached to the right support member 32. As the fan motor 51 rotates, indoor air is sucked through the suction port 4, passes through the heat exchanger 15, and is blown out from the blowout port 5.

  Below the heat exchanger 15, drain pans 13 and 14 for receiving drain water are provided at the front and rear, respectively. Each drain pan 13, 14 is formed to be long in the left-right direction corresponding to the heat exchanger 15. The drain pans 13 and 14 are connected via a water conduit (not shown) formed at one end in the left-right direction, and drain water of the drain pan 14 is led to the drain pan 13 via the water conduit. A drain port (not shown) is formed in the drain pan 13 and drain water is drained to the outside of the indoor unit 1 via a drain pipe (not shown) connected to the drain port.

  The filter guide 20 is provided on a guide member 23 supported by the housing 10. The guide member 23 has its front portion fixed to the front portion of the upper wall of the housing 10 and its rear end portion fixed to the back wall of the housing 10, and is arranged in three locations. The filters 24 are respectively held between the guide members 23.

  The filter guide 20 is formed by grooves 20a and 20b in which both ends of the filter 24 are fitted. The groove 20a is disposed at the front of the guide member 23 and formed in an annular shape, and the groove 20b is formed extending rearward from the rear end of the groove 20a. Further, a roller 21 for moving the filter 24 along the filter guide 20 is provided at the front of the guide member 23, and a brush 25 is provided along the groove 20a.

  The filter 24 disposed facing the suction port 4 slides on the brush 25 by the guidance of the filter guide 20 when the roller 21 is driven. Thereby, the filter 24 can be cleaned. The filter 24 after cleaning is disposed facing the suction port 4 by the drive of the roller 21.

  The heat exchanger 15 is formed by fixing a plurality of flat fins 31b to a refrigerant pipe 31 through which the refrigerant flows, and has a first heat exchange portion 15a, a second heat exchange portion 15b, and a third heat exchange portion 15c. ing. The first heat exchange unit 15 a is disposed in front of the cross flow fan 2, and the second heat exchange unit 15 b and the third heat exchange unit 15 c are arranged in a mountain shape on the upper side. The refrigerant pipe 31 extends in the left-right direction, is bent in a U-shape at bent portions 31a at both ends, and meanders, and is arranged in parallel in the vertical direction and the front-rear direction.

  A pair of support members 32 and 33 are attached to both side ends of the heat exchanger 15, and the support members 32 and 33 are erected in the housing 10 to support the both ends of the heat exchanger 15.

  FIG. 5 is a perspective view of the support member 33, and FIG. 6 is a view of the support member 33 of the indoor unit 1 viewed from the left. 5 shows the inner surface side of the support member 33, and FIG. 6 shows the outer surface side of the support member 33. As shown in FIG. FIG. 7 is a front sectional view of the support member 33. As shown in FIG.

  The support members 32 and 33 have a flat plate portion 40 and a flange portion 41 that protrudes inward from the lower portion of the plate portion 40 and is screwed to the housing 10. The flange portion 41 is curved to cover the side end of the cross flow fan 2. A plurality of elongated holes shaped holding holes 35 are opened in the plate portion 40.

  FIG. 8 is a perspective view showing the holding hole 35 in an enlarged manner. The outer surface of the plate portion 40 is provided with a cylindrical rib 36 projecting from the periphery of the holding hole 35. Engaging claws 38 project from the inner surface of the rib 36. Further, the lower end portion of the rib 36 is formed with a notch 37 extending inward from the outer end face. The notch 37 opens the lower end of the rib 36 facing downward.

  The bent portion 31 a of the heat exchanger 15 is inserted into the holding hole 35 and locked by the locking claw 38. The bent portion 31 a is engaged with the rib 36 so as to be in surface contact, and the heat exchanger 15 is supported by the support members 32 and 33. The heat exchanger 15 is positioned in the vertical and longitudinal directions by the ribs 36 and is positioned in the lateral direction by the engagement claws 38.

  Since the lower end portion of the rib 36 is opened downward facing the notch 37, drain water generated in the bent portion 31 a is drained through the notch 37. Therefore, the corrosion of the refrigerant pipe 31 can be prevented. Further, since the refrigerant pipe 31 is supported in surface contact by the bending portion 31 a, the load applied to the refrigerant pipe 31 is dispersed when an impact is applied to the housing 10 in the manufacturing process of the indoor unit 1. Therefore, deformation of the heat exchanger 15 can be prevented. Further, the locking claws 38 can prevent the heat exchanger 15 from falling off during the manufacturing process.

  Further, the fins 31 b disposed at both ends of the heat exchanger 15 abut on the plate portion 40. For this reason, when an impact is applied to the housing 10 in the manufacturing process of the indoor unit 1, swinging of the heat exchanger 15 in the left-right direction is prevented. Therefore, the deformation of the heat exchanger 15 can be prevented more reliably. More preferably, the fins 31 b are in surface contact with the plate portion 40.

  Further, at the upper end portion of the support member 33, a sealing portion 33a (see FIG. 7) extending inward and in contact with the filter guide 20 is formed. The sealing portion 33 a closes the gap between the filter guide 20 facing the second heat exchange portion 15 b and the third heat exchange portion 15 c and the support member 33. Accordingly, it is possible to suppress that the air sucked from the intake port 4 and flowing in through the gap between the filter guide 20 and the housing 10 flows into the heat exchanger 15 without passing through the filter 24. Therefore, air which is not collected by the filter 24 can be introduced into the heat exchanger 15 and dust can be prevented from adhering to the refrigerant pipe 31.

  Further, end plates 17 erected at left and right ends of the lower portion of the housing 10 are provided at both ends of the drain pans 13 and 14, and the support members 32 and 33 are mounted on the end plate 17. FIG. 9 shows a front sectional view of the lower end portion of the support member 33, and the support member 32 is also the same. A stepped portion 17 a is formed at the upper end of the end face plate 17, and a support member 33 is disposed in the stepped portion 17 a. Thereby, the both-sides end face of the ventilation path 6 can be shielded reliably, and an air flow leak can be prevented.

  A stepped portion may be provided at the lower end of the support members 32 and 33, and the end face plate 17 may be disposed in the stepped portion. Alternatively, the lower end of the support members 32 and 33 and the upper end of the end face plate 17 may be provided with stepped portions, and the vertically opposed stepped portions may be arranged to enter each other. That is, the other may be disposed in the step portion provided on at least one of the lower ends of the support members 32 and 33 and the upper end of the end face plate 17.

  In the above configuration, when the cooling operation is performed, indoor air is sucked from the suction port 4 when the cross flow fan 2 rotates in a state where the blowout port 5 is open. Dust contained in the sucked air is collected by the filter 24 and heat-exchanged by the heat exchanger 15. The heat exchanger 15 functions as an evaporator, and the air sucked from the room is cooled in the heat exchanger 15. The cooled air passes through the cross flow fan 2 and a cold air is blown out from the outlet 5 into the room.

  At this time, when the sucked air passes through the heat exchanger 15, the water vapor contained in the air condenses, drain water drips, and the drain water is accumulated in the drain pans 13 and 14. Drain water accumulated in the drain pans 13 and 14 flows toward a drain (not shown).

  According to the present embodiment, the pair of support members 32 and 33 erected in the housing 10 and supporting the both ends of the heat exchanger 15 are long hole shaped holding holes 35 in which the bent portions 31a are fitted; It has a cylindrical rib 36 projecting outward from the peripheral edge of the holding hole 35 and in surface contact with the peripheral surface of the bent portion 31a, and the lower end of the rib 36 is open facing downward. Thereby, it is possible to prevent the drain pipe accumulated in the inside of the rib 36 from being drained from the lower end portion and corrosion of the refrigerant pipe 31.

  Further, the rib 36 is provided with a locking claw 38 which protrudes from the inner circumferential surface and locks the inner circumferential portion of the bent portion 31a. Accordingly, when the support member 33 is attached to the refrigerant pipe 31, the engaging claws 38 position the supporting member 33 in the left-right direction, and the locking claws 38 can prevent the heat exchanger 15 from falling off during the manufacturing process.

  In addition, since the entire surface of the fins 31 b disposed at both ends of the heat exchanger 15 is in contact with the support member 33, the left and right sides of the heat exchanger 15 are subjected to an impact in the manufacturing process of the indoor unit 1. Rocking in the direction is prevented. Therefore, the deformation of the heat exchanger 15 can be prevented more reliably.

  The lower end of the support member 33 is disposed at the left and right ends of the drain pan 13 and mounted on the step portion 17a of the end face plate supported by the housing 10, and at least one of the lower end of the support member 33 and the upper end of the end face plate 13a. The other is disposed in the provided step portion. Thereby, the both-sides end surface of the ventilation path 6 can be shielded reliably, and an air flow leak can be prevented.

  Further, a sealing portion 33 a extending inward from the upper end of the side plate abuts on the filter guide 20 to close the gap between the support member 33 and the filter guide 20. This can prevent air that has been taken in from the intake port 4 and flowing in through the gap between the support frame 23 and the housing 10 from flowing into the heat exchanger 15 without passing through the filter 24. Thus, air that is not collected by the filter 24 can be prevented from flowing into the heat exchanger 15 and causing dust to adhere to the refrigerant pipe 31.

Second Embodiment
FIG. 10 is a front sectional view showing a part of the support member of the indoor unit 1 according to the second embodiment. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. In the second embodiment, a through hole 37a is provided in a part of the lowermost portion of the rib 36 instead of the notch 37 (see FIG. 7). The other parts are the same as in the first embodiment.

  The drain water generated in the bent portion 31a is drained through the through hole 37a. Therefore, the corrosion of the refrigerant pipe 31 can be prevented. Further, the strength of the rib 36 is improved, and the contact surface between the refrigerant pipe 31 and the rib 36 is enlarged, so that the refrigerant pipe 31 can be held more stably.

Third Embodiment
FIG. 11 is an enlarged perspective view of a rib 36 according to the third embodiment. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. In the third embodiment, a notch 37 is also formed at the upper end of the rib 36. Accordingly, when the bent portion 31a is fitted to the rib 36, the rib 36 divided by the notches 37 at the upper and lower end portions sandwiches the bent portion 31a from both sides and stably supports it by surface contact. FIG. 12 is a perspective view showing a modification of the rib 36 according to the second embodiment, and the ribs 36 vertically adjacent to each other may be connected and integrally molded. In addition, although the locking claw 38 is abbreviate | omitted in FIG. 11, FIG. 12, the locking claw 38 may be provided.

Fourth Embodiment
FIG. 13 is an enlarged perspective view showing a rib 36 according to the fourth embodiment, and FIG. 14 is a top cross-sectional view of the rib 36. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. In the fourth embodiment, the notches 37 extend inward from the outer end face while narrowing inward. Thereby, the elastic force is strongly exerted on the rib 36 in the direction to hold the bending portion 31a from both sides as approaching the inner side, and when the bending portion 31a is fitted to the rib 36, the rib 36 bends the bending portion 31a from both sides Hold and support stably by surface contact.

  In addition, on the inner peripheral surface of the rib 36, a piece of locking claw 38 is formed, the outer end of which is turned up and rotated. After the locking claws 38 are reclined and the bent portions 31a are inserted into the ribs 36 and fitted, the locking claws 38 are erected by the restoring force. As a result, the outer end of the locking claw 38 can abut on the inner peripheral portion of the bending portion 31a to lock the bending portion 31a.

Fifth Embodiment
FIG. 15 is an enlarged perspective view showing a rib 36 according to the fifth embodiment, and FIG. 16 is a top cross-sectional view of the rib 36. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. In the fifth embodiment, the rib 36 is formed in a semi-cylindrical shape, and the locking piece 39 faces the rib 36 and protrudes outward from the peripheral edge of the holding hole 35. The locking piece 39 extends outward in a direction approaching the rib 36, and the locking piece 39 presses the inner peripheral portion of the bent portion 31a to the inner peripheral surface side of the rib 36 for locking. Thereby, the rib 36 can be formed widely open, and the drainage property of the drain water accumulated in the rib 36 can be further improved.

  The present invention is applicable to an indoor unit of an air conditioner in which a side plate is attached to a side end of a heat exchanger.

Reference Signs List 1 indoor unit 2 cross flow fan 4 suction port 5 outlet 10 housing 11 front cover 13, 14 drain pan 15 heat exchanger 16 louver 17 end plate 20 filter guide 21 roller 23 holding member 24 filter 25 cleaning unit 31 refrigerant pipe 31a bent Portion 31b Fin 32, 33 Support member 33a Sealing portion 35 Holding hole 36 Rib 37 Notch 38 Locking claw 40 Plate portion 41 Flange portion

Claims (5)

A plurality of fins are fixed to a refrigerant pipe which extends in the lateral direction and is bent at a bent portion at both ends extending in the lateral direction, and a casing which opens a suction port and a blowout port, and a cross flow fan disposed horizontally in the casing. Air conditioner comprising a heat exchanger formed on the upstream side of the cross flow fan, and a pair of support members standing in the housing and supporting both ends of the heat exchanger The indoor unit further includes a drain pan for collecting drain water of the heat exchanger, the drain pan having end plates supported on the housing at the left and right ends, and the support member is placed on the end plate The other is disposed in a stepped portion provided on at least one of the lower end of the support member and the upper end of the end face plate, and the support member is a long hole shaped holding hole into which the bent portion fits, and Protruding outward from the peripheral edge, the bent portion is engaged That a cylindrical and a rib, the indoor unit of an air conditioner, wherein a lower end portion of the rib is opened facing downward.   The indoor unit of the air conditioner according to claim 1, wherein the rib is provided with a locking claw which protrudes from an inner peripheral surface and locks the inner peripheral portion of the bent portion.   The indoor unit of the air conditioner according to claim 1 or 2, wherein the fins disposed at both ends of the heat exchanger abut the support member. A filter disposed between the suction port and the heat exchanger, and a filter guide slidably supporting the filter, wherein the support member extends inward from an upper end portion and abuts against the filter guide The indoor unit of the air conditioner according to any one of claims 1 to 3 , further comprising a stop portion, and closing the gap between the filter guide and the support member by the sealing portion. A plurality of fins are fixed to a refrigerant pipe which extends in the lateral direction and is bent at a bent portion at both ends extending in the lateral direction, and a casing which opens a suction port and a blowout port, and a cross flow fan disposed horizontally in the casing. Air conditioner comprising a heat exchanger formed on the upstream side of the cross flow fan, and a pair of support members standing in the housing and supporting both ends of the heat exchanger The indoor unit further includes a drain pan for collecting drain water of the heat exchanger, the drain pan having end plates supported on the housing at the left and right ends, and the support member is placed on the end plate An indoor unit of an air conditioner according to any of the preceding claims, wherein the other is disposed in a stepped portion provided on at least one of the lower end of the support member and the upper end of the end plate.

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