Air conditioning device and unit comprising same

Abstract

A constitution unit of an air conditioning device includes a support member (75) that supports a heat exchanger (65) and has a fixed portion (79) fixed to a portion of an inner surface of a ceiling (36a) inside an opening (73), and a suppression member (90) that suppresses flow of condensation water from a first region (R1) to the support member (75), the first region (R1) being a region of the inner surface of the ceiling (36a) between a first edge (73a) formed by the opening (73) and the fixed portion (79).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an air conditioning apparatus and a constituent unit. BACKGROUND

[0002] The air conditioning apparatus disclosed in Patent Literature 1 includes an indoor unit as a constituent unit. Inside a housing of the indoor unit, a heat exchanger having a heat transfer pipe is arranged. In the heat exchanger, air is cooled or heated by a refrigerant. The air that has passed through the heat exchanger and has been temperature-adjusted is supplied to an indoor space.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Laid-Open Patent Publication No. 2019-100643 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The present inventors have invented the following structure.

[0008] A heat insulating member is provided on an inner surface of a ceiling of a housing of a constituent unit. The heat exchanger is fixed to the ceiling of the housing by a support member. Specifically, the fixing portion of the support member is fixed to the ceiling through an opening formed in the heat insulating member.

[0009] In this structure, the opening is designed to be slightly larger than the fixing portion of the support member in consideration of manufacturing errors and assembly errors of the heat insulating member. As a result, a region on the inner surface of the ceiling between the edge formed by the opening and the fixing portion of the support member is exposed to the inside space of the housing. As a result, sometimes moisture in the air condenses on the surface of the region to generate dew.

[0010] On the other hand, in the case where the heat transfer pipe of the heat exchanger is made of aluminum material, the ionization tendency of the heat transfer pipe is higher than that of the ceiling containing iron-based material. In this case, if the dew generated in the region of the ceiling flows to the heat exchanger along the support member, it can cause the heat transfer pipe to be electrically corroded.

[0011] An object of the present disclosure is to suppress the electric corrosion of the heat exchanger supported by the support member.

[0012] TECHNICAL SOLUTION FOR SOLVING THE PROBLEMS

[0013] The first aspect relates to a constituent unit of an air conditioning apparatus, the constituent unit of the air conditioning apparatus including a casing 35 having a ceiling 36a made of a metal material, a heat exchanger 65 arranged in the casing 35 and having a heat transfer pipe 66 made of a metal material having a higher ionization tendency than the ceiling 36a, a heat insulating member 70 covering an inner surface of the ceiling 36a and having an opening 73, a support member 75 supporting the heat exchanger 65 and having a fixed portion 79 fixed to a portion of the inner surface of the ceiling 36a inside the opening 73, and a suppression member 90 suppressing flow of dew water from a first region Rl to the support member 75, the first region Rl being a region of the inner surface of the ceiling 36a between a first edge 73a formed by the opening 73 and the fixed portion 79.

[0014] According to the first aspect, the heat transfer pipe 66 of the heat exchanger 65 has a higher ionization tendency than the ceiling 36a of the casing 35. However, the suppression member 90 suppresses flow of dew water from the first region Rl to the support member 75, the first region Rl being a region of the inner surface of the ceiling 36a between the first edge 73a formed by the opening 73 and the fixed portion 79. Therefore, it is possible to suppress galvanic corrosion of the heat transfer pipe 66.

[0015] The second aspect is based on the first aspect, and the suppression member 90 suppresses flow of the dew water generated in the first region Rl to the support member 75.

[0016] According to the second aspect, even if the dew water is generated in the first region Rl, the suppression member 90 suppresses flow of the dew water to the support member 75.

[0017] The third aspect is based on the second aspect, and the suppression member 90 includes a protruding portion 92 extending downward from the first region Rl.

[0018] According to the third aspect, even if the dew water is generated in the first region Rl, the protruding portion 92 of the suppression member 90 can prevent flow of the dew water to the support member 75.

[0019] The fourth aspect is based on the third aspect, and the suppression member 90 includes the protruding portion 92 and a base portion 93 having a height smaller than that of the protruding portion 92 and formed between the protruding portion 92 and the fixed portion 79.

[0020] According to the fourth aspect, even if dew is generated in the first region Rl, the protruding portion 92 can prevent the dew from flowing to the support member 75. The area of the first region Rl exposed to the inside of the housing 35 is reduced by the base portion 93. Therefore, generation of dew in the first region Rl can also be suppressed.

[0021] The fifth aspect is based on the third aspect, and the protruding portion 92 is formed so as to extend to the fixing portion 79.

[0022] According to the fifth aspect, the area of the first region Rl covered by the protruding portion 92 is increased, and the area of the first region Rl exposed to the inside of the housing 35 is reduced. Therefore, generation of dew in the first region Rl can be suppressed.

[0023] The sixth aspect is based on the first aspect, and the suppression member 90 suppresses generation of dew in the first region Rl, thereby suppressing the dew from flowing to the support member 75 from the first region Rl.

[0024] According to the sixth aspect, the suppression member 90 suppresses generation of dew in the first region Rl as such. Therefore, electric corrosion of the heat transfer pipe 66 can be suppressed.

[0025] The seventh aspect is based on the sixth aspect, and the suppression member 90 is formed separately from the heat insulating member 70, and the suppression member 90 includes an auxiliary heat insulating member 98 that covers the first region Rl.

[0026] According to the seventh aspect, by covering the first region Rl with the auxiliary heat insulating member 98, generation of dew in the first region Rl can be suppressed.

[0027] The eighth aspect is based on any one of the first aspect to the seventh aspect, and the suppression member 90 includes an intermediate portion 95 between the top plate 36a and the fixing portion 79.

[0028] According to the eighth aspect, the intermediate portion 95 is provided between the top plate 36a and the fixing portion 79. Therefore, in the portion of the inner surface of the top plate 36a on which the fixing portion 79 is located, generation of dew can be suppressed.

[0029] The ninth aspect is based on the eighth aspect, and the constituent unit of the air conditioning device includes a fastening member 85 that fastens the fixing portion 79 and the intermediate portion 95 to the top plate 36a.

[0030] According to the ninth aspect, by fastening the fastening member 85 to the top plate 36a, the intermediate portion 95 of the suppression member 90 and the support member 75 can be easily fixed to the top plate 36a.

[0031] The tenth aspect is based on the ninth aspect, and the intermediate portion 95 has a higher hardness than the heat insulating member 70.

[0032] According to the tenth aspect, breakage of the intermediate portion 95 accompanying fastening of the fastening member 85 can be suppressed.

[0033] The eleventh aspect is based on the ninth aspect or the tenth aspect, and a fastening hole 80 through which the fastening member 85 passes is formed in the fixed portion 79, and a fixing member 86 made of resin is included in the constituent unit of the air conditioning device, the fixing member 86 is provided on the lower side of the fixed portion 79, and is fixed by the fastening member 85 in a manner of enclosing a gap C between a second edge 80a formed by the fastening hole 80 and the fastening member 85.

[0034] According to the eleventh aspect, when condensation water is generated on the side of the ceiling panel 36a, the fixing member 86 can prevent the condensation water from moving to the side of the support member 75 through the fastening hole 80 of the fixed portion 79.

[0035] The twelfth aspect is based on any one of the eighth aspect to the eleventh aspect, and a notch 95a is formed in the intermediate portion 95, and the fixed portion 79 and the ceiling panel 36a are configured to contact each other through the notch 95a.

[0036] According to the twelfth aspect, the fixed portion 79 of the support member 75 and the ceiling panel 36a contact each other through the notch 95a, and thus the heat exchanger 65, the support member 75, and the housing 35 can be electrically connected, and grounding of these members can be ensured.

[0037] The thirteenth aspect is based on any one of the first aspect to the twelfth aspect, and the suppression member 90 is made of a resin material.

[0038] According to the thirteenth aspect, by making the suppression member 90 of a resin material, corrosion of the suppression member 90 can be suppressed.

[0039] The fourteenth aspect relates to an air conditioning device including the constituent unit of any one of the first aspect to the thirteenth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a piping diagram of an air conditioning device according to an embodiment;

[0041] Figure 2 is a perspective view of an indoor unit as viewed from an oblique lower side;

[0042] Figure 3 is a simplified plan view of an indoor unit with a ceiling panel of a housing main body omitted;

[0043] Figure 4 is a brief cross-sectional view of the indoor unit showing Figure 3 IV-O-IV cross section;

[0044] Figure 5 is an enlarged perspective view of the main part of the indoor heat exchanger and the support member;

[0045] Figure 6 is a view of the upper plate of the support member as viewed from the lower side;

[0046] Figure 7 is a cross-sectional view showing Figure 6 VII-VII cross section;

[0047] Figure 8 is a cross-sectional view showing Figure 6 VIII-VIII cross section;

[0048] Figure 9 is a view related to Modification 1, which corresponds to Figure 8 ;

[0049] Figure 10 is a view related to Modification 2, which corresponds to Figure 8 ;

[0050] Figure 11 is a view related to Modification 3, which corresponds to Figure 8 ;

[0051] Figure 12 is a view related to other embodiments, which corresponds to Figure 8 ; DETAILED DESCRIPTION

[0052] Hereinafter, embodiments of the present disclosure will be explained in detail with reference to the attached drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications can be made without departing from the technical idea of the present disclosure. Each drawing is used to conceptually explain the present disclosure, and thus the size, the ratio, or the number is sometimes exaggerated or simplified as needed for easy understanding.

[0053] (1) Outline of Air-Conditioning Device

[0054] As shown in Figure 1 , the air-conditioning device 10 includes an outdoor unit 20 and an indoor unit 30. The outdoor unit 20 and the indoor unit 30 are each a constituent unit that constitutes the air-conditioning device 10.

[0055] The outdoor unit 20 and the indoor unit 30 are connected to each other via a pair of connection ducts 12. In the air-conditioning device 10, a refrigerant circuit 11 that performs a vapor compression refrigeration cycle is constituted by the outdoor unit 20, the indoor unit 30, and the connection ducts 12.

[0056] (2) Outdoor unit

[0057] The outdoor unit 20 is provided outdoors. The outdoor unit 20 includes a compressor 21, a four-way reversing valve 22, an outdoor heat exchanger 23, an outdoor fan 25, an expansion valve 24, a liquid-side normally closed valve 26, and a gas-side normally closed valve 27.

[0058] The compressor 21 is, for example, a totally-enclosed scroll compressor or a totally-enclosed rotary compressor. The compressor 21 sucks in low-pressure refrigerant and compresses it, and then discharges the refrigerant compressed to be high-pressure (high-pressure refrigerant).

[0059] The four-way reversing valve 22 is a valve for switching the flow direction of refrigerant in the refrigerant circuit 11. The four-way reversing valve 22 is switched between a first state shown by a solid line in FIG. 8 and a second state shown by a dashed line in FIG. 8. The first state is a state in which the high-pressure refrigerant discharged from the compressor 21 is sent to the outdoor heat exchanger 23, and the low-pressure refrigerant flowing from the indoor unit 30 is sent to the compressor 21. The second state is a state in which the high-pressure refrigerant discharged from the compressor 21 is sent to the indoor unit 30, and the low-pressure refrigerant after passing through the outdoor heat exchanger 23 is sent to the compressor 21. Figure 1 Figure 1

[0060] The outdoor heat exchanger 23 is a heat exchanger that exchanges heat between refrigerant and outdoor air. The outdoor heat exchanger 23 is, for example, a fin-and-tube heat exchanger. The outdoor fan 25 is a fan that supplies outdoor air to the outdoor heat exchanger 23. The expansion valve 24 is an electrically-driven expansion valve whose opening degree is variable.

[0061] (3) Outline of indoor unit

[0062] The indoor unit 30 is provided in an indoor space that is an object of air conditioning. The indoor unit 30 has an indoor heat exchanger 65 and an indoor fan 50.

[0063] As shown in FIG. 1, the indoor unit 30 of the present embodiment is a ceiling-embedded indoor unit. As shown in FIG. 2 and FIG. 3, the indoor unit 30 includes a casing 35, the indoor fan 50, the indoor heat exchanger 65, a water pan 55, and a horn-like member 52. Figure 2 Figure 3 Figure 4 The casing 35 includes a casing main body 36 and a decorative panel 40. The indoor fan 50, the indoor heat exchanger 65, the water pan 55, and the horn-like member 52 are housed in the casing 35.

[0064] (3-1) Casing

[0065] The casing 35 includes a casing main body 36 and a decorative panel 40. The indoor fan 50, the indoor heat exchanger 65, the water pan 55, and the horn-like member 52 are housed in the casing 35.

[0066] ​​​​The main body 36 is a box-shaped component with an open bottom and an approximate cuboid shape. The main body 36 has an approximate flat top plate 36a and side plates 36b extending downward from the periphery of the top plate 36a.

[0067] (3-2) Indoor fan

[0068] like Figure 4 As shown, the indoor fan 50 is a so-called turbo fan. The indoor fan 50 blows air drawn in from below radially outward. The indoor fan 50 is located in the center of the interior of the housing body 36. The indoor fan 50 is driven by an indoor fan motor 51. The indoor fan motor 51 is fixed to the center of the top plate 36a.

[0069] (3-3) Trumpet-shaped component

[0070] A horn-shaped component 52 is arranged below the indoor fan 50. The horn-shaped component 52 is used to guide the air flowing into the housing 35 toward the indoor fan 50. Together with the drip tray 55, the horn-shaped component 52 divides the internal space of the housing 35 into a primary space 37a on the intake side of the indoor fan 50 and a secondary space 37b on the exhaust side of the indoor fan 50.

[0071] (3-4) Indoor heat exchanger

[0072] The indoor heat exchanger 65 is a so-called horizontally finned tube heat exchanger. For example... Figure 3 As shown, the indoor heat exchanger 65 is formed into a square cylindrical shape from a planar perspective and is arranged to surround the indoor fan 50. The indoor heat exchanger 65 is arranged in the secondary space 37b. The indoor heat exchanger 65 allows air passing from the inside of the indoor heat exchanger 65 to the outside to exchange heat with the refrigerant in the refrigerant circuit.

[0073] The indoor heat exchanger 65 has multiple fins 67 and heat transfer tubes 66 extending through the multiple fins 67 along the thickness direction of the plate. Refrigerant flows inside the heat transfer tubes 66. The fins 67 are heat transfer components that facilitate heat exchange between the refrigerant and the air.

[0074] (3-5) Water receiving tray

[0075] The drip tray 55 is a component made of so-called polystyrene foam. For example... Figure 4 As shown, the drip tray 55 is arranged to block the lower end of the housing body 36. A drip groove 56 is formed on the upper surface of the drip tray 55 along the lower end of the indoor heat exchanger 65. The lower end of the indoor heat exchanger 65 enters the drip groove 56. The drip groove 56 receives the condensate generated in the indoor heat exchanger 65.

[0076] like Figure 2As shown, four main blow-out passages 57 and four sub blow-out passages 58 are formed in the water pan 55, respectively. The main blow-out passages 57 and the sub blow-out passages 58 are passages for the flow of air after passing through the indoor heat exchanger 65, and extend through the water pan 55 in the up-and-down direction.

[0077] The main blow-out passages 57 are through-holes with an elongated rectangular cross section. One main blow-out passage 57 is arranged along each of the four sides of the housing main body 36, respectively. The sub blow-out passages 58 are through-holes with a slightly curved rectangular cross section. One sub blow-out passage 58 is arranged at each of the four corners of the housing main body 36, respectively.

[0078] (3-6) Decorative panel

[0079] The decorative panel 40 is a resin member formed in the shape of a square thick plate. The lower portion of the decorative panel 40 is formed in the shape of a square that is larger by one turn than the top plate 36a of the housing main body 36. The decorative panel 40 is arranged so as to cover the lower surface of the housing main body 36. In addition, the lower surface of the decorative panel 40 is exposed to the indoor space.

[0080] As shown in Figs. 1 and 2, a square suction port 41 is formed in the central portion of the decorative panel 40. The suction port 41 extends through the decorative panel 40 in the up-and-down direction, and communicates with the primary space 37a inside the housing 35. A lattice-shaped suction grille 45 is provided at the suction port 41. A filter 46 is arranged above the suction grille 45. Figure 2 Figure 4 As shown in Figs. 1 and 2, a square suction port 41 is formed in the central portion of the decorative panel 40. The suction port 41 extends through the decorative panel 40 in the up-and-down direction, and communicates with the primary space 37a inside the housing 35. A lattice-shaped suction grille 45 is provided at the suction port 41. A filter 46 is arranged above the suction grille 45.

[0081] A square ring-shaped blow-out port 44 is formed in the decorative panel 40 so as to surround the suction port 41. As shown in Figs. 1 and 2, the blow-out port 44 is divided into four main blow-out openings 42 and four sub blow-out openings 43. Figure 2

[0082] The main blow-out openings 42 are elongated rectangular openings. One main blow-out opening 42 is arranged along each of the four sides of the decorative panel 40, respectively. The main blow-out openings 42 of the decorative panel 40 correspond to the main blow-out passages 57 of the water pan 55, one-to-one. Each main blow-out opening 42 communicates with the corresponding main blow-out passage 57. In addition, one air direction adjusting fin 47 is provided at each main blow-out opening 42.

[0083] The sub blow-out openings 43 are quarter-circular arc-shaped openings. One sub blow-out opening 43 is arranged at each of the four corners of the decorative panel 40, respectively. The sub blow-out openings 43 of the decorative panel 40 correspond to the sub blow-out passages 58 of the water pan 55, one-to-one. Each sub blow-out opening 43 communicates with the corresponding sub blow-out passage 58.

[0084] (4) Operation

[0085] The air conditioning apparatus 10 selectively performs cooling operation and heating operation.​​

[0086] (4-1) Cooling operation

[0087] In the cooling operation, the four-way reversing valve 22 is set to the first state, and the refrigerant circulates in the refrigerant circuit 11. In the refrigerant circuit 11, the outdoor heat exchanger 23 functions as a radiator, and the indoor heat exchanger 31 functions as an evaporator. The indoor unit 30 cools air drawn in from the indoor space in the indoor heat exchanger 31, and then blows out the cooled air to the indoor space.

[0088] (4-2) Heating operation

[0089] In the heating operation, the four-way reversing valve 22 is set to the second state, and the refrigerant circulates in the refrigerant circuit 11. In the refrigerant circuit 11, the indoor heat exchanger 31 functions as a radiator, and the outdoor heat exchanger 23 functions as an evaporator. The indoor unit 30 heats air drawn in from the indoor space in the indoor heat exchanger 31, and then blows out the heated air to the indoor space.

[0090] (4-3) Flow of air in the indoor unit

[0091] During the operation of the indoor unit, the indoor fan 50 rotates. When the indoor fan 50 rotates, indoor air in the indoor space flows into the primary space 37a inside the casing 35 through the suction port 41. The air that has flowed into the primary space 37a is sucked by the indoor fan 50, and is blown out to the secondary space 37b.

[0092] The air that has flowed into the secondary space 37b is cooled or heated while passing through the indoor heat exchanger 65, and then flows into the four main blow-out passages 57 and the four sub blow-out passages 58, respectively. The air that has flowed into the main blow-out passage 57 is blown out to the indoor space through the main blow-out opening 42. The air that has flowed into the sub blow-out passage 58 is blown out to the indoor space through the sub blow-out opening 43.

[0093] (5) Features

[0094] The indoor unit 30 of the air-conditioning apparatus 10 of the present embodiment includes a heat-insulating casing 70, a support member 75, a fastening member 85, and a suppression member 90. The heat-insulating casing 70 is provided on the inner side of the casing 35 of the indoor unit 30. The support member 75 is fixed to the ceiling 36a of the casing 35, and supports the indoor heat exchanger 65 that is a heat exchanger. The suppression member 90 suppresses the flow of condensation water to the support member 75. Details of these structures will be described below. Figures 4 to 8 It should be noted that, in the following description, statements indicating directions related to "up", "down", "right", "left", "front", and "back" are based on the directions indicated by the arrows of the drawings as a reference. The arrow of the drawing is indicated by the arrow of the drawing. Figure 5 It should be noted that, in the following description, statements indicating directions related to "up", "down", "right", "left", "front", and "back" are based on the directions indicated by the arrows of the drawings as a reference. The arrow of the drawing is indicated by the arrow of the drawing.

[0095] (5-1) Insulation shell

[0096] like Figure 4 As shown, the heat insulation shell 70 covers the inner surface of the housing body 36. The heat insulation shell 70 is a heat insulation component made of so-called polystyrene foam. The heat insulation shell 70 is a rectangular box-shaped component with an open bottom. The heat insulation shell 70 has a top-plate side heat insulation portion 71 formed on the inner side of the top plate 36a, and side-plate side heat insulation portions 72 formed on the inner sides of each side plate 36b. The heat insulation shell 70 suppresses the formation of condensation on the inner surface of the top plate 36a. Specifically, the heat insulation shell 70 suppresses the exposure of the inner surface of the top plate 36a to the interior space of the housing 35 by covering the inner surface of the top plate 36a. As a result, air is prevented from cooling to below the dew point temperature on the inner surface of the top plate 36a, thereby suppressing the formation of condensation on the inner surface.

[0097] An opening 73 is formed on the heat insulation shell 70 for fixing the support member 75 to the top plate 36a. Specifically, an opening 73 is formed on the heat insulation portion 71 on the top plate side of the heat insulation shell 70, corresponding to the portion where the support member 75 is fixed. The indoor unit 30 in this example has multiple support members 75. Multiple openings 73 are formed on the heat insulation shell 70 in a manner that corresponds one-to-one with each of the multiple support members 75.

[0098] The opening 73 exposes the inner surface of the top plate 36a to the interior space of the housing 35. Thus, with the heat insulation shell 70 installed inside the housing 35, the support member 75 can be fixed to the top plate 36a through the opening 73.

[0099] (5-2) Support components

[0100] like Figure 5 As shown, the support member 75 is arranged inside the housing 35, inside the indoor heat exchanger 65. In other words, the support member 75 is arranged in a primary space 37a upstream of the indoor heat exchanger 65 in the direction of airflow. The indoor unit 30 in this example has three support members 75, which are not shown in the figure. Each support member 75 is arranged corresponding to a different side of the indoor heat exchanger 65.

[0101] The support member 75 is formed as a plate extending in the vertical direction. The support member 75 is formed by folding back a metal plate. The support member 75 has a main plate 76, a lower plate 77, a vertical plate 78, and an upper plate 79.

[0102] The main body plate 76 extends vertically along the inner side of the indoor heat exchanger 65. The main body plate 76 is formed into a rectangular plate with a vertical length. On the left and right sides of the main body plate 76, there are first folded-back portions 76a that protrude forward.

[0103] The lower plate 77 extends rearward along the lower surface of the indoor heat exchanger 65 from the lower end of the main plate 76. The vertical plate 78 extends upward along the outer side surface of the indoor heat exchanger 65 from the rear end of the lower plate 77. The indoor heat exchanger 65 is held between the main plate 76, the lower plate 77, and the vertical plate 78. In other words, the support member 75 has a hook portion that supports the indoor heat exchanger 65 from the lower side.

[0104] The upper plate 79 extends forward from the upper end of the main plate 76. The upper plate 79 extends to the side opposite to the indoor heat exchanger 65. The upper plate 79 constitutes a fixing portion for fixing the support member 75 to the ceiling panel 36a. The upper plate 79 is formed in a rectangular shape in a plan view. Second return portions 79a that protrude downward are formed at the front end, the right end, and the left end of the upper plate 79, respectively.

[0105] The opening 73 is formed in the thermal shield 70 at a position corresponding to the upper plate 79. In other words, the upper plate 79 is located inside the opening 73.

[0106] A first fastening hole 80 into which the fastening member 85 is inserted is formed in the upper plate 79. The first fastening hole 80 is formed by penetrating the upper plate 79 in the thickness direction of the upper plate 79. The first fastening hole 80 is formed in a circular shape in a plan view.

[0107] (5-3) Fastening Member

[0108] The fastening member 85 is a member for fixing the support member 75 to the ceiling panel 36a. The fastening member 85 can be a screw, a bolt, and a nut. By tightening the fastening member 85, the upper plate 79 of the support member 75 is fixed to the ceiling panel 36a.

[0109] (5-4) Relationship of Ionization Tendency of Main Members

[0110] The housing 35 and the support member 75 are made of an iron-based metal material. In contrast, the heat transfer tube 66 and the fins 67 of the indoor heat exchanger 65 are made of an aluminum-based metal material. Therefore, the ionization tendency of the heat transfer tube 66 is higher than the ionization tendency of the ceiling panel 36a. Further, the ionization tendency of the heat transfer tube 66 is higher than the ionization tendency of the support member 75. The ionization tendency of the support member 75 is the same as or lower than that of the ceiling panel 36a. The ionization tendency of the fastening member 85 is the same as or lower than that of the ceiling panel 36a. The materials of these members are merely one example, and other materials can be used.

[0111] (5-5) Regarding Generation of Dew

[0112] To account for manufacturing and assembly errors, the aforementioned heat insulation shell 70 is designed such that the size of its opening 73 is slightly larger than the size of the upper plate 79 when viewed from a planar perspective. This is because if the upper plate 79 is misaligned with the opening 73 due to these errors, it may be impossible to secure the upper plate 79 to the top plate 36a.

[0113] If the size of the opening 73 is set slightly larger, a region (hereinafter referred to as the first region R1) will be formed between the first edge 73a formed by the opening 73 and the upper plate 79 on the inner surface of the top plate 36a. If the first region R1 of the top plate 36a is exposed to the interior space of the housing 35 due to this factor, air may be cooled in the first region R1 and condensation may occur.

[0114] As described above, the heat transfer tube 66 is made of a material with a higher ionization tendency than the top plate 36a. Therefore, if condensation water flows from the first region R1 to the heat transfer tube 66 via the support member 75, it may cause electrolytic corrosion of the heat transfer tube 66.

[0115] (5-6) Suppression components

[0116] In view of the above problems, the indoor unit 30 of this embodiment is provided with a suppressing member 90 to suppress the flow of condensation water from the first region R1 to the support member 75. The suppressing member 90 suppresses the flow of condensation water generated in the first region R1 onto the support member 75.

[0117] The suppressing component 90 is made of resin material. The suppressing component 90 is preferably made of heat-insulating material. The hardness of the suppressing component 90 is higher than that of the heat-insulating shell 70.

[0118] like Figures 6 to 8 As shown, the suppression member 90 is arranged inside the opening 73 of the heat insulation shell 70. The suppression member 90 has a side portion 91 located in a first region R1 of the top plate 36a and a middle portion 95 located between the top plate 36a and the upper plate 79.

[0119] The side portion 91 of the suppression member 90 has a protrusion 92 and a base 93. In this embodiment, the suppression member 90 has multiple protrusions 92 surrounding the upper plate 79. One protrusion 92 is provided at a position corresponding to the side edge of the upper plate 79. The protrusions 92 are plate-shaped. The protrusions 92 extend downward from the first region R1.

[0120] Specifically, the plurality of protruding portions 92 of the present embodiment are composed of a first protruding portion 92A, a second protruding portion 92B, and a third protruding portion 92C. In the first region Rl of the present embodiment, the areas of the front side portion, the right side portion, and the left side portion of the upper plate 79 are relatively large. In the present embodiment, three protruding portions 92 are provided in a one-to-one correspondence with these portions. The first protruding portion 92A is located at the front side of the upper plate 79. The first protruding portion 92A extends in the left-right direction along the front edge of the upper plate 79. The second protruding portion 92B is located at the right side of the upper plate 79. The second protruding portion 92B extends in the front-rear direction along the right edge of the upper plate 79. The third protruding portion 92C is located at the left side of the upper plate 79. The third protruding portion 92C extends in the front-rear direction along the left edge of the upper plate 79.

[0121] The height of the base portion 93 in the vertical direction is smaller than the height of the protruding portion 92 in the vertical direction. In the plan view, the base portion 93 is formed between the protruding portion 92 and the upper plate 79. In other words, in the plan view, the base portion 93 is formed so as to span the protruding portion 92 and the upper plate 79.

[0122] The intermediate portion 95 is provided between the ceiling plate 36a and the upper plate 79. The intermediate portion 95 covers the region of the inner surface of the ceiling plate 36a that is located on the upper side (back side) of the upper plate 79. In the plan view, the intermediate portion 95 is formed in a rectangular shape. The intermediate portion 95 has a higher hardness than the heat-insulating case 70. A second fastening hole 96 for insertion of the fastening member 85 is formed in the intermediate portion 95. In the plan view, the second fastening hole 96 is formed in a circular shape. The center of the second fastening hole 96 substantially coincides with the center of the first fastening hole 80. The inner diameter of the second fastening hole 96 is smaller than the inner diameter of the first fastening hole 80.

[0123] (5-7) Mounting work of indoor heat exchanger

[0124] The indoor heat exchanger 65 is supported to the ceiling plate 36a by the following steps.

[0125] First, the heat-insulating case 70 is installed inside the case 35. Next, the indoor heat exchanger 65 is hung on the hook portion of the support member 75. Then, the suppression member 90 and the upper plate 79 of the support member 75 are positioned at the opening 73 of the heat-insulating case 70. The intermediate portion 95 of the suppression member 90 is sandwiched between the upper plate 79 and the ceiling plate 36a, and the axes of the first fastening hole 80 and the second fastening hole 96 are made to coincide with each other, and the fastening member 85 is fastened to the ceiling plate 36a in this state. Thus, the suppression member 90 and the support member 75 are fixed to the ceiling plate 36a by the fastening member 85.

[0126] (6) Effects of the embodiment

[0127] The suppression member 90 suppresses the flow of the condensed water from the first region R1, which is a region on the inner surface of the top plate 36a between the first edge 73a of the opening 73 and the upper plate 79, to the support member 75. Specifically, the suppression member 90 suppresses the flow of the condensed water generated in the first region R1 to the support member 75. Thereby, it is possible to suppress the condensed water generated in the first region R1 from flowing onto the heat transfer pipe 66 made of aluminum via the support member 75, and thus it is possible to suppress the occurrence of the electric corrosion of the heat transfer pipe 66.

[0128] More specifically, the suppression member 90 has a protruding portion 92 that extends downward from the first region R1. Thus, in the case where the condensed water is generated in a portion of the first region R1 that is located on the side opposite to the upper plate 79 with the side portion 91 interposed, it is possible to prevent the condensed water from reaching the upper plate 79 by the protruding portion 92. Specifically, since the condensed water falls downward along the side surface of the protruding portion 92, it is possible to suppress the movement of the condensed water to the upper plate 79. Thus, it is possible to suppress the flow of the condensed water generated in the first region R1 to the support member 75.

[0129] The suppression member 90 includes the protruding portion 92 and a base portion 93 that has a height smaller than that of the protruding portion 92 and is formed between the protruding portion 92 and the upper plate 79.

[0130] It is possible to suppress the condensed water generated in the first region R1 from reaching the upper plate 79 by the protruding portion 92. Further, it is possible to suppress the generation of the condensed water in the vicinity of the upper plate 79 by the base portion 93. Thus, it is possible to further suppress the flow of the condensed water from the first region R1 to the support member 75.

[0131] The suppression member 90 includes an intermediate portion 95 located between the top plate 36a and the upper plate 79. The intermediate portion 95 covers a portion on the inner surface of the top plate 36a on the back surface side of the upper plate 79. Thus, it is possible to suppress the generation of the condensed water in the portion. Thus, it is possible to suppress the flow of the condensed water to the support member 75 via the second fastening hole 96 and the first fastening hole 80.

[0132] Since the base portion 93 and the intermediate portion 95 are continuously formed as one body, it is possible to simultaneously suppress the generation of the condensed water in the first region R1 from the vicinity of the upper plate 79 to the back surface side of the upper plate 79.

[0133] The indoor unit 30 includes a fastening member 85 that fastens the upper plate 79 together with the intermediate portion 95 to the top plate 36a. Thus, by the fastening of the fastening member 85, it is possible to simultaneously fix the suppression member 90 and the support member 75 to the top plate 36a. Further, it is possible to easily align the suppression member 90 to the position corresponding to the upper plate 79.

[0134] The hardness of the middle portion 95 is higher than that of the heat insulation shell 70. Therefore, it is possible to prevent damage to the middle portion 95 or the suppression component 90 caused by fastening with the fastening component 85. Consequently, it is possible to prevent condensation from forming on the back side of the upper plate 79 due to damage to the middle portion 95.

[0135] The suppressing component 90 is made of resin material. Therefore, it is possible to suppress corrosion of the suppressing component 90 caused by condensation. By making the suppressing component 90 with heat-insulating material, it is possible to suppress the formation of condensation on the portion of the top plate 36a covered by the suppressing component 90.

[0136] (7) Variation

[0137] The above-described embodiments can also adopt the following structure. The differences from the above-described embodiments will be explained in the following description.

[0138] (7-1) Variation Example 1

[0139] like Figure 9 As shown, the suppression component 90 in Modification 1 is an auxiliary heat insulation component 98. The auxiliary heat insulation component 98 is composed of a separate component from the heat insulation shell 70. The auxiliary heat insulation component 98 is arranged inside the opening 73 to cover the first region R1. The auxiliary heat insulation component 98 can be made of the same material as the heat insulation shell 70 or a different material. The auxiliary heat insulation component 98 can cover the entire first region R1 or only a portion of it. The auxiliary heat insulation component 98 suppresses the formation of condensation in the first region R1, thereby preventing condensation from flowing from the first region R1 to the support component 75. As a result, electro-corrosion of the heat transfer tube 66 can be suppressed.

[0140] Compared to the heat insulation shell 70, the auxiliary heat insulation component 98 is smaller in size. Therefore, compared to the heat insulation shell 70, the manufacturing and assembly errors of the auxiliary heat insulation component 98 are smaller. Consequently, the auxiliary heat insulation component 98 can be precisely arranged inside the opening 73.

[0141] (7-2) Variation Example 2

[0142] like Figure 10As shown, in Modification 2, based on the structure of the above embodiment, a fixing member 86 made of resin is further included. The fixing member 86 is a so-called washer made of resin. The fixing member 86 is arranged between the head 85a of the fastening member 85 and the upper plate 79. A hole is formed on the fixing member 86 for the threaded portion 85b of the fastening member 85 to be inserted. The fixing member 86 is fixed by the fastening member 85 in a manner that seals a gap C, which is the gap between the second edge 80a formed by the first fastening hole 80 of the upper plate 79 and the threaded portion 85b of the fastening member 85. The fixing member 86 inhibits condensation generated on the top plate 36a side from flowing to the support member 75 through the gap C. Therefore, electro-corrosion of the heat transfer tube 66 can be suppressed. By making the fixing member 86 with a resin material, corrosion of the fixing member 86 can also be suppressed.

[0143] (7-3) Variation Example 3

[0144] like Figure 11 As shown, in Modification 3, a notch 95a is formed in the center of the middle portion 95 of the suppressing member 90 in the embodiment. The notch 95a forms a circular opening that enlarges the inner diameter of the second fastening hole 96 in the embodiment. In Modification 3, the upper plate 79 and the top plate 36a are configured to contact each other through the notch 95a. Specifically, as... Figure 11 As schematically shown, in this example, with the fastening member 85 tightened, the central portion of the upper plate 79 is pushed towards the top plate 36a. Consequently, the second edge 80a of the upper plate 79 comes into contact with the top plate 36a. Here, the top plate 36a is grounded. Therefore, by bringing the top plate 36a into contact with the support member 75, the top plate 36a, the support member 75, and the heat exchanger 65 can be grounded. As a result, sparks or electric shocks to workers caused by the indoor heat exchanger 65 becoming energized can be suppressed.

[0145] (8) Other implementation methods

[0146] In the above embodiments and variations, the following structure may also be adopted.

[0147] The support member 75 and the suppression member 90 may also be installed in the outdoor unit 20, which constitutes the unit. In this case, the support member 75 supports the outdoor heat exchanger 23, which is a heat exchanger.

[0148] The support member 75 can also be arranged on the outside of the indoor heat exchanger 65. In other words, the support member 75 can also be arranged in the secondary space 37b downstream of the indoor heat exchanger 65 in the direction of airflow.

[0149] The suppression component 90 may also be made of a metallic material. In this case, it is preferable that the ionization tendency of the suppression component 90 is the same as or lower than that of the top plate 36a. Preferably, the potential difference between the suppression component 90 and the indoor heat exchanger 65 is smaller than the potential difference between the top plate 36a and the indoor heat exchanger 65.

[0150] The protrusion 92 of the suppressing member 90 may be one, two, or more than four. When there are four protrusions 92, it is preferable to arrange one protrusion 92 corresponding to each of the four sides of the upper plate 79.

[0151] like Figure 12 As shown, the protrusion 92 in this embodiment can also extend to the upper plate 79. The suppression member 90 in this structure does not have the base 93, which is shorter than the protrusion 92, as in the above embodiment. The height of the protrusions 92 is generally equal. In this structure, the area of ​​the first region R1 covered by the protrusion 92 becomes larger, and the area of ​​the first region R1 exposed towards the interior space of the housing 35 becomes smaller. Therefore, condensation in the first region R1 can be suppressed.

[0152] The embodiments and variations have been described above; however, it should be understood that various changes in form and specific circumstances are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, variations, and other embodiments may be appropriately combined or substituted.

[0153] The terms “first,” “second,” “third,” etc., mentioned above are only used to distinguish statements containing these terms and do not limit the number or order of the statements.

[0154] -Industry Applicability-

[0155] In summary, this disclosure is useful for air conditioning devices and constituent units.

[0156] - Symbol Explanation -

[0157] 10 Air conditioning units

[0158] 35 housing

[0159] 36a Top Plate

[0160] 65 Indoor heat exchanger (heat exchanger)

[0161] 67 heat transfer tubes

[0162] 70 Thermal insulation shell (thermal insulation component)

[0163] 73 opening

[0164] 73a First Edge

[0165] 75 support member

[0166] 79 upper plate (fixed portion)

[0167] 80 first fastening hole (fastening hole)

[0168] 80a second edge

[0169] 85 fastening member

[0170] 86 fixing member

[0171] 90 suppression member

[0172] 92 protruding portion

[0173] 93 base portion

[0174] 95 intermediate portion

[0175] 95a notch

[0176] 98 auxiliary heat insulating member

[0177] C gap

[0178] R1 first region

Claims

1. A unit structure of an air conditioning apparatus, characterized by: a unit structure of an air conditioning apparatus including a case (35), a heat exchanger (65), an insulating member (70), a supporting member (75), and a suppressing member (90), the case (35) having a ceiling (36a) made of a metal material, the heat exchanger (65) being disposed in the case (35) and having a heat transfer pipe (66) made of a metal material having a higher ionization tendency than the ceiling (36a), the insulating member (70) covering an inner surface of the ceiling (36a) and having an opening (73), the supporting member (75) supporting the heat exchanger (65) from a lower side and having a fixing portion (79) fixed to a portion of the inner surface of the ceiling (36a) inside the opening (73), and the suppressing member (90) suppressing condensation water produced in a first region (Rl) or flowing from the first region (Rl) to the supporting member (75), the first region (Rl) being a region of the inner surface of the ceiling (36a) between a first edge (73a) formed by the opening (73) and the fixing portion (79).

2. The unit structure of an air conditioning apparatus according to claim 1, characterized in that: the suppressing member (90) suppresses condensation water produced in the first region (Rl) from flowing to the supporting member (75).

3. The unit structure of an air conditioning apparatus according to claim 2, characterized in that: the suppressing member (90) includes a protruding portion (92) extending downward from the first region (Rl).

4. The unit structure of an air conditioning apparatus according to claim 3, characterized in that: the suppressing member (90) includes the protruding portion (92) and a base portion (93) having a protruding height smaller than that of the protruding portion (92) and formed between the protruding portion (92) and the fixing portion (79).

5. The unit structure of an air conditioning apparatus according to claim 3, characterized in that: the protruding portion (92) is formed so as to extend to the fixing portion (79).

6. The unit structure of an air conditioning apparatus according to claim 1, characterized in that: the suppressing member (90) suppresses condensation water from being produced in the first region (Rl).

7. The unit structure of an air conditioning apparatus according to claim 6, characterized in that: the suppressing member (90) is formed separately from the insulating member (70), and includes an auxiliary insulating member (98) covering the first region (Rl).

8. The unit structure of an air conditioning apparatus according to any one of claims 1 to 7, characterized in that: the suppressing member (90) includes an intermediate portion (95) between the ceiling (36a) and the fixing portion (79).

9. The unit structure of an air conditioning apparatus according to claim 8, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The constituent unit of the air conditioning device includes a fastening member (85) that fastens the fixing portion (79) together with the intermediate portion (95) to the top plate (36a).

10. The constituent unit of the air conditioning device according to claim 9, wherein: The intermediate portion (95) has a higher hardness than the thermal insulating member (70).

11. The constituent unit of the air conditioning device according to claim 9, wherein: On the fixing portion (79), a fastening hole (80) through which the fastening member (85) passes is formed, The constituent unit of the air conditioning device includes a fixing member (86) made of resin that is provided on the lower side of the fixing portion (79) and is fixed by the fastening member (85) in a manner that seals a gap (C) between a second edge (80a) formed by the fastening hole (80) and the fastening member (85).

12. The constituent unit of the air conditioning device according to claim 8, wherein: On the intermediate portion (95), a notch (95a) is formed, The fixing portion (79) and the top plate (36a) are configured to contact each other through the notch (95a).

13. The constituent unit of the air conditioning device according to any one of claims 1 to 7, wherein: The suppression member (90) is made of a resin material.

14. An air conditioning device, comprising: The air conditioning device includes the constituent unit according to any one of claims 1 to 7.

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