Indoor heat exchanger unit and indoor unit of air conditioner

Abstract

This indoor heat exchanger unit comprises: a plurality of fins arranged at intervals in one direction; heat transfer pipes passing through the plurality of fins, the heat transfer pipes having turn-back parts that turn back at end sections in the one direction; and heat-exchanger-holding components provided to the one-direction end sections of the heat transfer pipes, the heat-exchanger-holding components having a plate-form holder substrate in which are formed insertion holes into which the turn-back parts are inserted. The heat-exchanger-holding components also have hooks for holding upper sections of the turn-back parts, the hooks being provided to upper edge sections of the insertion holes and protruding from a second surface of the holder substrate, the second surface being on the opposite side of the holder substrate from a first surface facing the fins. The insertion holes each include: a piping region in which the turn-back parts held by the hooks are positioned, the piping region having a rounded-corner rectangular shape; and a drainage hole that is allowed to communicate with the piping region and is located below the piping region.

Description

[Technical Field]

[0001] The present disclosure relates to an indoor heat exchanger unit including a heat exchanger holding component that is attached to a side of an indoor heat exchanger to support a heat transfer tube, and an indoor unit of an air conditioner. [Background technology]

[0002] For example, in an indoor unit of a wall-mounted air conditioner, a housing includes a heat exchanger that surrounds a blower, and a heat exchanger holder (hereinafter also referred to as a holder) that is attached to the horizontal ends of the heat exchanger and fixes the shape of the heat exchanger by fixing the angle between parts of the heat exchanger (see, for example, Patent Document 1). The heat exchanger of the indoor unit disclosed in Patent Document 1 is composed of a front heat exchange section and a rear heat exchange section that are arranged in front of and behind the blower, and each heat exchange section has a plurality of fins arranged in the horizontal direction and a serpentine heat transfer tube that passes through the plurality of fins. The holder in Patent Document 1 is arranged at the left end of the heat exchanger, and the left folded portions of the heat transfer tubes of the front heat exchange section and the rear heat exchange section are inserted into a plurality of insertion holes formed in the holder's plate-shaped holder base, thereby fixing, for example, the positions and angles of the heat exchange sections relative to each other and fixing the shape of the entire heat exchanger. In addition, the holder of Patent Document 1 has a cylindrical wall portion that stands upright on the left side from the edge of the entire circumference of the insertion hole, and this wall portion surrounds the folded portion of the heat transfer tube, thereby regulating the orientation of the folded portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 165970 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since a refrigerant flows through the heat transfer tube, condensation occurs on the heat transfer tube and the holder that comes into contact with the heat transfer tube. In the holder of Patent Document 1, a wall portion is provided around the entire circumference of the holder base, including the lower edge of the insertion hole, and dew pools form inside this cylindrical wall portion. When dew pools form inside the wall portion, the folded portion of the heat transfer tube continues to come into contact with the condensation in the dew pool, which can cause corrosion of the heat transfer tube.

[0005] The present disclosure has been made to solve the above-mentioned problems, and provides an indoor heat exchanger unit and an indoor unit of an air conditioner that can suppress corrosion of heat transfer tubes due to condensation water remaining on the heat exchanger holding parts (holders). [Means for solving the problem]

[0006] The indoor heat exchanger unit according to the present disclosure includes a plurality of fins arranged at intervals in one direction, a heat transfer tube that penetrates the plurality of fins and has a folded portion that folds back at an end in the one direction, and a heat exchanger holding component having a plate-shaped holder substrate that is provided at the end in the one direction of the heat transfer tube and has an insertion hole into which the folded portion is inserted, wherein the heat exchanger holding component has a hook that protrudes from a second surface of the holder substrate opposite to a first surface that faces the fins and is provided at an upper edge of the insertion hole and holds an upper portion of the folded portion, and the insertion hole includes a piping area having a rectangular shape with rounded corners in which the folded portion held by the hook is arranged, and a drainage hole that is provided below the piping area and communicates with the piping area. The heat exchanger holding component is provided so as to protrude from the second surface of the holder base plate and has an inclined wall portion that extends downwardly toward a lower portion of the drainage hole. .

[0007] In addition, the indoor unit of the air conditioner according to the present disclosure comprises the above-mentioned indoor heat exchanger unit and a blower that supplies indoor air to the indoor heat exchanger constituted by the plurality of fins and the heat transfer tubes of the indoor heat exchanger unit, the indoor heat exchanger being constituted by a plurality of heat exchange sections arranged along the outer peripheral surface of the blower, and the heat exchanger holding part supporting the heat transfer tubes at the ends of the plurality of heat exchange sections in one direction. [Effects of the Invention]

[0008] In the indoor heat exchanger unit and air conditioner indoor unit of the present disclosure, the hooks for holding the folded portion of the heat transfer tube are provided on the upper edge of the insertion hole, and the insertion hole is provided with a drain hole below the piping area. As a result, condensation water generated at the folded portion flows downward from the hooks by gravity and is drained out of the heat exchanger holding component through the drain hole, making it difficult for condensation to accumulate. This prevents corrosion of the heat transfer tube due to condensation water remaining in the heat exchanger holding component. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing the appearance of an indoor unit of an air conditioner according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view showing the internal configuration of the indoor unit of FIG. [Figure 3] FIG. 2 is an exploded perspective view showing the configuration of the indoor unit of FIG. [Figure 4] FIG. 4 is a perspective view showing the configuration of the indoor heat exchanger unit of FIG. 3. [Figure 5] FIG. 2 is a refrigerant circuit diagram of an air conditioner equipped with the indoor unit of FIG. [Figure 6] FIG. 5 is a plan view of the indoor heat exchanger unit of FIG. 4. [Figure 7] 7 is a cross-sectional view of the indoor heat exchanger unit of FIG. 6 taken along the line AA, viewed from the right side. [Figure 8] FIG. 5 is a side view of the indoor heat exchanger unit of FIG. 4, seen from the left side. [Figure 9] FIG. 9 is an enlarged view of a portion Q of the indoor heat exchanger unit in FIG. 8. [Figure 10] FIG. 9 is a partial perspective view showing the configuration of a portion Q of the indoor heat exchanger unit of FIG. 8. [Figure 11] 10 is a cross-sectional view of the indoor heat exchanger unit of FIG. 9 taken along the line BB, as viewed from the front. [Figure 12] 10 is a cross-sectional view of the indoor heat exchanger unit of FIG. 9 taken along the CC cross section as viewed from the rear side. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of an indoor unit of an air conditioner according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiments, and various modifications are possible without departing from the spirit of the present disclosure. In addition, in each drawing, the same reference numerals denote the same or equivalent parts, and this is common throughout the entire specification. Note that in each drawing, the relative dimensional relationships or shapes of each component may differ from those in reality.

[0011] Embodiment 1 FIG. 1 is a perspective view showing the appearance of an indoor unit 10A of an air conditioner according to a first embodiment of the present disclosure (hereinafter also simply referred to as indoor unit 10A). FIG. 2 is a cross-sectional view showing the internal configuration of the indoor unit 10A of FIG. 1. In FIG. 2, the flow of indoor air drawn into the indoor unit 10A is indicated by outline arrows F1, and the flow of conditioned air is indicated by outline arrows F2. FIG. 3 is an exploded perspective view showing the configuration of the indoor unit 10A of FIG. 1. FIG. 4 is a perspective view showing the configuration of the indoor heat exchanger unit 3 of FIG. 3. The general configuration of the indoor unit 10A will be described below with reference to FIGS. 1 to 4.

[0012] In the following description, terms indicating directions (such as "up," "down," "right," "left," "front," and "rear") are used as appropriate to facilitate understanding, but these are for the purpose of explanation and do not limit the present disclosure. Furthermore, unless otherwise specified, these directional terms refer to the directions when the indoor unit 10A is viewed from the side of the front panel 8. In the drawings, the direction of arrow Y represents the front-to-rear direction of the indoor unit 10A, the direction of arrow X represents the lateral direction, i.e., left-to-right direction, of the indoor unit 10A, and the direction of arrow Z represents the up-down direction of the indoor unit 10A.

[0013] (Configuration of indoor unit 10A) As shown in Fig. 1, the indoor unit 10A is a wall-mounted indoor unit that is installed on, for example, a wall inside a room. As shown in Fig. 2 and Fig. 3, the indoor unit 10A includes a rear case 2, an indoor heat exchanger unit 3, a blower 17, an air outlet structure 6, a design case 7, a front panel 8, etc. As shown in Fig. 3, the indoor heat exchanger unit 3 has an indoor heat exchanger 15 and a plate-shaped heat exchanger holding component 40 attached to the end of the indoor heat exchanger 15 in the lateral direction (direction of arrow X).

[0014] As shown in Fig. 1, the rear case 2 and the decorative case 7 form the outer shell of the indoor unit 10A (hereinafter also referred to as the housing 1). As shown in Figs. 2 and 3, an indoor air inlet 7a is provided at the top of the housing 1, and an outlet 7b for conditioned air generated when the indoor air exchanges heat with the indoor heat exchanger 15 is provided at the bottom front of the housing 1. An air passage P is formed inside the indoor unit 10A, connecting the inlet 7a and the outlet 7b.

[0015] A filter 90 is provided on the top of the indoor unit 10A to remove dust from the indoor air drawn into the housing 1 through the air inlet 7a. As shown in Fig. 3, the indoor unit 10A also includes an automatic cleaning mechanism 9 for the filter 90, and an electrical equipment box 5 that houses various electrical components required for operating the indoor unit 10A.

[0016] 2 and 3, the rear case 2 has a rear section 21 that is attached to a wall inside the room, and an air passage component 22 that is provided at the front lower part of the rear section 21 and that constitutes part of the air passage P. The air passage component 22 of the rear case 2 has a curved cross section that is generally arc-shaped or the like, and forms the rear side of the air passage. A bucket-shaped rear drain pan 22u is formed on the upper part of the air passage component 22. The rear drain pan 22u collects condensation that occurs during operation of the indoor unit 10A and drips from the rear portion of the indoor heat exchanger 15.

[0017] 3, a fan support section 23 is provided on the lower front side of the rear section 21. The fan support section 23 is made up of a pair of opposing plate-shaped members that extend forward from both the left and right sides of the air-path forming member 22. The fan support section 23 rotatably supports the fan shaft 17a of the blower 17. The right plate-shaped member 23a that constitutes the fan support section 23 has a substantially circular shape, while the left plate-shaped member 23b that constitutes the fan support section 23 has a circular shape with the front half missing. An arc-shaped recess 23br is formed in the front edge of the left plate-shaped member 23b, in which the fan shaft 17a is disposed.

[0018] The design case 7 is fixed to the rear case 2 with screws. As shown in FIG. 2, a front opening 71o is provided on the front of the design case 7, and an air outlet 7b is provided on the lower front side of the design case 7. The front panel 8 is attached to the design case 7 and covers the front opening 71o on the front of the design case 7 in an openable and closable manner. The front panel 8 is configured to be fixed to shafts (not shown) on the upper left and right sides of the design case 7, for example, and may be detachable from the design case 7. An indoor heat exchanger 15, a blower 17, and an air outlet structure 6 are arranged between the rear case 2 and the design case 7.

[0019] As shown in Fig. 3, the design case 7 has a left side surface portion 72 that forms the left side surface of the indoor unit 10A, and a right side surface portion 73 that forms the right side surface of the indoor unit 10A. The design case 7 also has a front frame portion 71 (see Fig. 2) that connects the front ends of the left side surface portion 72 and the right side surface portion 73, an upper left surface portion 74 that extends to the right from the upper end of the left side surface portion 72, and an upper right surface portion 75 that extends to the left from the upper end of the right side surface portion 73.

[0020] As shown in FIG. 2, when the designer case 7 is viewed from the side, the front frame portion 71 of the designer case 7 has an L-shape that opens at an obtuse angle. Specifically, the front frame portion 71 has an upper front frame portion 71a that is substantially parallel to the rear portion 21 of the rear case 2 and an inclined lower frame portion 71b that extends rearward from the lower end of the upper front frame portion 71a. A front opening 71o that is covered by the front panel 8 is provided in the upper front frame portion 71a of the front frame portion 71, and an air outlet 7b is provided in the inclined lower frame portion 71b of the front frame portion 71. Furthermore, as shown in FIGS. 2 and 3, the upper end, upper left surface portion 74, and upper right surface portion 75 of the front frame portion 71 of the designer case 7 and the upper end of the rear portion 21 of the rear case 2 form an indoor air intake port 7a.

[0021] As shown in Fig. 2, the air outlet structure 6 is disposed at the front lower part of the indoor unit 10A. The air outlet structure 6 has a drain pan 61. The drain pan 61 receives condensation water that occurs during operation of the indoor unit 10A and drips from the front part of the indoor heat exchanger 15, and is provided below the indoor heat exchanger 15. The drain pan 61 is formed in a gutter shape.

[0022] The underside 61b of the drain pan 61 forms part of the air passage P and has the function of guiding the conditioned air to the air outlet 7b after passing through the indoor heat exchanger 15. Of the air passage P connecting the intake port 7a and the air outlet 7b, the air passage portion on the air outlet 7b side is formed on the front side by the underside 61b of the drain pan 61 and on the rear side by the air passage component 22 of the rear case 2.

[0023] The air outlet structure 6 also has a plurality of airflow direction vanes 63 that adjust the direction of air blown into the room from the air outlet 7b. The plurality of airflow direction vanes 63 are driven by an airflow direction vane motor (not shown). In the example of Fig. 2, the air outlet structure 6 has a plurality of left and right airflow direction vanes 63a and two up and down airflow direction vanes 63b, and when the indoor unit 10A is not operating, the air outlet 7b is covered by the two up and down airflow direction vanes so that the inside of the air passage P is not visible to the user.

[0024] As shown in Fig. 2, the indoor heat exchanger unit 3, blower 17, and air outlet structure 6 are mounted on the rear case 2. As shown in Fig. 3, blower 17 is configured as, for example, a crossflow fan or a cross-flow fan, and has a fan shaft 17a which is a rotation shaft. The blower 17 is disposed inside the indoor unit 10A such that the fan shaft 17a is rotatably supported by a fan support portion 23 of the rear case 2, and extends in the lateral direction of the indoor unit 10A. Although not shown, the blower 17 has a fan motor that rotates and drives the fan shaft 17a.

[0025] 2 and 3, the indoor heat exchanger 15 includes a plurality of fins 31 each having a plate shape and a plurality of heat transfer tubes 32 through which a refrigerant flows. The fins 31 are arranged horizontally (in the direction of arrow X) at intervals, and the heat transfer tubes 32 penetrate the fins 31 arranged horizontally. Each fin 31 has a plurality of through holes 31h into which the heat transfer tubes 32 are inserted. The through holes 31h have, for example, a circular shape. The indoor heat exchanger 15 is attached to the rear case 2 via a heat exchanger holding component 40 and is disposed along the outer circumferential surface of the blower 17.

[0026] Here, as shown in FIGS. 2 and 4, the indoor heat exchanger 15 is defined as having multiple heat exchange sections. As shown in FIG. 2, the indoor heat exchanger 15 has a front heat exchange section 30f that is L-shaped with an obtuse angle and opens rearward in a side view, and an I-shaped rear heat exchange section 30b. Specifically, the front heat exchange section 30f is composed of a front surface 30f1 extending in the vertical direction and an inclined wall section 30f2 that extends upward and rearward from the upper end of the front surface 30f1. The rear heat exchange section 30b is configured to extend downward and rearward from the rear end of the inclined wall section 30f2 of the front heat exchange section 30f. In other words, when the indoor heat exchanger 15 is disposed in the housing 1 as shown in FIG. 2, the front, top, and upper rear sides of the blower 17 are covered by the L-shaped front heat exchange section 30f and the I-shaped rear heat exchange section 30b. Hereinafter, the front heat exchange section 30f and the rear heat exchange section 30b may be referred to as the heat exchange section 30 without distinction.

[0027] The shapes of the heat exchange sections 30, the shape of the indoor heat exchanger 15, and the surface of the fan covered by the indoor heat exchanger 15 are not limited to the above. For example, the indoor heat exchanger 15 may be configured in an inverted V shape by an I-shaped front heat exchange section 30f and an I-shaped rear heat exchange section 30b in a side view, and may cover the upper front surface, top surface, and upper rear surface of the fan 17.

[0028] As shown in FIG. 4, the indoor heat exchanger 15 has refrigerant piping 18a that connects the heat transfer tubes 32 of the front heat exchange section 30f and the heat transfer tubes 32 of the rear heat exchange section 30b.

[0029] By configuring the indoor heat exchanger 15 with multiple heat exchange sections 30, for example, and giving the indoor heat exchanger 15 a curved shape that fits along the outer peripheral surface of the blower 17, it is possible to increase the heat exchange area of ​​the indoor heat exchanger 15 that comes into contact with the indoor air that flows in from the air inlet 7a of the indoor unit 10A, compared to when the indoor heat exchanger 15 is configured with a single heat exchange section 30 that is I-shaped in side view. In other words, the performance and capacity of the indoor heat exchanger 15 are improved.

[0030] As shown in FIG. 4, the heat exchanger holding component 40 is attached to the lateral ends of the multiple heat exchange sections 30 that make up the indoor heat exchanger 15. The heat exchanger holding component 40 holds the heat transfer tubes 32 of the multiple heat exchange sections 30 so that the positions of the multiple heat exchange sections 30 and the angles between the heat exchange sections 30 are predetermined positions and angles. The heat exchanger holding component 40 is attached to the indoor heat exchanger 15 and fixed to the rear case 2 (see FIG. 2). The heat exchanger holding component 40 is made of, for example, resin. The heat exchanger holding component 40 may also be made of a sheet metal component.

[0031] In the example of FIG. 3, the heat exchanger holding part 40 is attached to the left end of the indoor heat exchanger 15 and is screwed to the fan support part 23 on the left side of the rear case 2. When the indoor heat exchanger unit 3 is attached to the rear case 2, the heat exchanger holding part 40 faces the left side surface part 72 of the design case 7. Note that the heat exchanger holding part 40 may also be attached to the right end of the lateral ends of the indoor heat exchanger 15. The detailed structure of the heat exchanger holding part 40 and the attachment position of the heat exchanger holding part 40 on the indoor heat exchanger 15 will be described later.

[0032] 2, the indoor unit 10A draws indoor air through the intake port 7a at the top of the indoor unit 10A by driving the blower 17, exchanges heat with the indoor heat exchanger 15 to produce cool air or warm air (i.e., conditioned air), and then blows the cool air or warm air into the room through the outlet port 7b at the front bottom of the indoor unit 10A. This cools or heats the room.

[0033] The filter 90 shown in FIG. 1 is detachably mounted on the indoor unit 10A. As shown in FIG. 3, the automatic cleaning mechanism 9 is disposed at the air inlet 7a at the top of the indoor unit 10A and includes a lattice-shaped filter support part 91 that supports the filter 90, a collection mechanism (not shown) that collects dust adhering to the filter 90, and a dust box 92 that stores the dust. The filter 90 is supported by the filter support part 91 and disposed between the air inlet 7a at the top of the housing 1 and the indoor heat exchanger 15, covering the top side of the indoor heat exchanger 15. The collection mechanism (not shown) is composed of, for example, a dust collection motor that moves the filter 90 and a brush that comes into contact with the top surface of the filter 90 while it is moving. The automatic cleaning mechanism 9 is attached to the rear case 2, for example, by hooking a hook provided at the rear end of the filter support part 91 into a hole provided at the top of the rear case 2, and is fixed to the indoor heat exchanger unit 3 attached to the rear case 2 with screws. The dust box 92 is disposed in front of the indoor heat exchanger 15, and is detachable through the front opening 71o of the design case 7 with the front panel 8 open.

[0034] The electrical component box 5 houses various electrical components that drive, for example, the fan motor, air direction motor, and dust collection motor described above. The electrical component box 5 is fixed with screws to the air outlet structure 6 and the automatic cleaning mechanism 9, and the design case 7 is fixed with screws to the automatic cleaning mechanism 9 and the electrical component box 5. Inside the indoor unit 10A, the electrical component box 5 is arranged in the space between the air outlet structure 6 and the automatic cleaning mechanism 9 and the front panel 8, and in the space between the automatic cleaning mechanism 9 and the right side surface part 73 of the design case 7.

[0035] As described above, the filter 90 is disposed between the air inlet 7a of the design case 7 and the indoor heat exchanger 15, i.e., on the upwind side of the indoor heat exchanger 15. Therefore, when indoor air is drawn into the indoor unit 10A by the blower 17, the filter 90 removes dust from the indoor air, preventing the dust from adhering to the indoor heat exchanger 15. Dust that has adhered to the filter 90 is then removed from the filter 90 by the collection mechanism of the automatic cleaning mechanism 9 and accumulated in the dust box 92. Because the dust box 92 is detachable, the user can remove the dust box 92 from the indoor unit 10A to discard the dust and ensure space for collecting the dust.

[0036] (Configuration of air conditioner 100) Figure 5 is a refrigerant circuit diagram of an air conditioner 100 equipped with the indoor unit 10A of Figure 1. Solid arrows in Figure 5 indicate the direction of refrigerant flow during heating operation, and dashed arrows indicate the direction of refrigerant flow during cooling operation. As shown in Figure 5, the air conditioner 100 is a device that adjusts indoor air, and is equipped with an indoor unit 10A and an outdoor unit 10B. The outdoor unit 10B is equipped with, for example, a compressor 11, a flow path switching device 12, an outdoor heat exchanger 13, an outdoor blower 16, and an expansion section 14. The indoor unit 10A is equipped with, for example, an indoor heat exchanger 15 and a blower 17.

[0037] The refrigerant circuit RC is configured by connecting a compressor 11, a flow switching device 12, an outdoor heat exchanger 13, an expansion section 14, and an indoor heat exchanger 15 via refrigerant piping 18. The compressor 11 draws in refrigerant in a low-temperature, low-pressure state, compresses the drawn refrigerant, and discharges it as refrigerant in a high-temperature, high-pressure state. The flow switching device 12 switches the direction of refrigerant flow in the refrigerant circuit RC and is, for example, a four-way valve. The outdoor heat exchanger 13 exchanges heat between, for example, outdoor air and the refrigerant. The outdoor heat exchanger 13 functions as a condenser during cooling operation and as an evaporator during heating operation. The outdoor fan 16 is a device that sends outdoor air to the outdoor heat exchanger 13.

[0038] The expansion section 14 is a pressure reducing valve or expansion valve that reduces the pressure of the refrigerant to expand it. The expansion section 14 is, for example, an electronic expansion valve whose opening is adjustable. The indoor heat exchanger 15 is, for example, a device that exchanges heat between indoor air and the refrigerant. The indoor heat exchanger 15 acts as an evaporator during cooling operation and as a condenser during heating operation. The blower 17 is a device that sends indoor air to the indoor heat exchanger 15.

[0039] (Operation mode, cooling operation) Next, the operating modes of the air conditioner 100 will be described. First, cooling operation will be described. In cooling operation, the refrigerant drawn into the compressor 11 is compressed by the compressor 11 and discharged in a high-temperature, high-pressure gas state. The high-temperature, high-pressure gas refrigerant discharged from the compressor 11 passes through the flow switching device 12 and flows into the outdoor heat exchanger 13, which functions as a condenser. In the outdoor heat exchanger 13, the refrigerant exchanges heat with outdoor air sent by the outdoor blower 16, condensing and liquefying. The condensed liquid refrigerant flows into the expansion section 14, where it expands and is decompressed to become a low-temperature, low-pressure, two-phase gas-liquid refrigerant. The two-phase gas-liquid refrigerant then flows into the indoor heat exchanger 15, which functions as an evaporator. In the indoor heat exchanger 15, the refrigerant exchanges heat with indoor air sent by the blower 17, evaporating and gasifying. At this time, the indoor air is cooled, and the room is cooled. The evaporated refrigerant in a gaseous state at a low temperature and pressure passes through the flow switching device 12 and is sucked into the compressor 11.

[0040] (Operation mode, heating operation) Next, heating operation will be described. In heating operation, the refrigerant drawn into the compressor 11 is compressed by the compressor 11 and discharged in a high-temperature, high-pressure gas state. The high-temperature, high-pressure gas refrigerant discharged from the compressor 11 passes through the flow switching device 12 and flows into the indoor heat exchanger 15, which functions as a condenser. In the indoor heat exchanger 15, the refrigerant exchanges heat with indoor air sent by the blower 17, condensing and liquefying. At this time, the indoor air is heated, and heating is performed indoors. The condensed liquid refrigerant flows into the expansion section 14, where it expands and decompresses to become a low-temperature, low-pressure, two-phase gas-liquid refrigerant. The two-phase gas-liquid refrigerant then flows into the outdoor heat exchanger 13, which functions as an evaporator. In the outdoor heat exchanger 13, the refrigerant exchanges heat with outdoor air sent by the outdoor blower 16, evaporating and gasifying. The evaporated low-temperature, low-pressure gas refrigerant passes through the flow switching device 12 and is drawn into the compressor 11.

[0041] The mounting position of the heat exchanger holding component 40 in the indoor heat exchanger 15 and the detailed structure of the heat exchanger holding component 40 will be described below. FIG. 6 is a plan view of the indoor heat exchanger unit 3 in FIG. 4. FIG. 7 is a cross-sectional view of the indoor heat exchanger unit 3 in FIG. 6 taken along line AA, as seen from the right side. FIG. 8 is a side view of the indoor heat exchanger unit 3 in FIG. 4 taken along line AA, as seen from the left side. FIG. 9 is an enlarged view of part Q of the indoor heat exchanger unit 3 in FIG. 8. FIG. 10 is a partial perspective view showing the configuration of part Q of the indoor heat exchanger unit 3 in FIG. 8. FIG. 11 is a cross-sectional view of the indoor heat exchanger unit 3 in FIG. 9 taken along line BB, as seen from the front side. FIG. 12 is a cross-sectional view of the indoor heat exchanger unit 3 in FIG. 9 taken along line CC, as seen from the rear side. In FIGS. 8 and 10, the folded-back portion 32b in the row farthest from the fan 17 out of the three rows of folded-back portions 32b is omitted to make the structure of the heat exchanger holding component 40 easier to understand.

[0042] To explain the mounting position of the heat exchanger holding component 40 in the indoor heat exchanger 15, the configuration of the heat transfer tubes 32 of the indoor heat exchanger 15 will first be described with reference to Figures 6 to 8. As shown in Figure 6, the heat transfer tubes 32 have straight tube sections 32a (see Figure 7) that extend linearly in the horizontal direction (direction of arrow X) and penetrate the multiple fins 31, and U-shaped folded-back sections 32b (see Figures 6 and 8) that connect to the ends of the straight tube sections 32a in the horizontal direction (direction of arrow X). The heat transfer tubes 32 have a configuration in which the straight tube sections 32a and the folded-back sections 32b are alternately connected, and have a serpentine shape.

[0043] In the indoor heat exchanger 15, heat exchange between the refrigerant and the indoor air takes place mainly through the multiple fins 31 and the straight pipe sections 32a on which the multiple fins 31 are provided. Because a portion of the straight pipe sections 32a is exposed from the gaps between the fins 31, indoor air passing through the gaps between the fins 31 hits this exposed portion of the straight pipe sections 32a, and heat exchange takes place between the refrigerant flowing inside the straight pipe sections 32a and the indoor air passing outside the straight pipe sections 32a. The fins 31 are in thermal contact with the straight pipe sections 32a of the heat transfer tubes 32, and therefore promote heat exchange by thermal conduction.

[0044] Next, the detailed structure of the heat exchanger holding component 40 and the mounting position of the heat exchanger holding component 40 will be described with reference to FIGS. 6 to 12. As shown in FIGS. 7 and 8, the heat exchanger holding component 40 has a plate-shaped holder substrate 41. As shown in FIG. 8, the holder substrate 41 has a plurality of insertion holes 41h into which the folded-back portions 32b of the heat transfer tubes 32 are inserted. The holder substrate 41 is formed in a roughly C-shape with a notch cut out from the lower rear side, and an arc-shaped recess 41r is formed at the lower rear edge in which the fan shaft 17a of the blower 17 is disposed. The lower rear edge of the holder substrate 41 faces the front edge portion of the left plate-shaped member 23b of the fan support portion 23 of the rear case 2 in the front-rear direction (direction of arrow Y), and rotatably supports the fan shaft 17a of the blower 17 together with the front edge portion of the left plate-shaped member 23b.

[0045] 6 to 8, with the folded portions 32b of the heat transfer tubes 32 of the multiple heat exchange units 30 held by the heat exchanger holding component 40, the plate-shaped holder substrate 41 is arranged so as to be approximately perpendicular to the straight pipe portions 32a extending in the horizontal direction (direction of arrow X). The holder substrate 41 has the function of concentrating the air flowing into the indoor heat exchanger 15 to the center of the indoor heat exchanger 15 where the fins 31 are arranged, rather than to the side portions of the indoor heat exchanger 15 where the folded portions 32b are arranged. In other words, the holder substrate 41 is an air passage wall provided at one end in the horizontal direction (direction of arrow X) of an air passage P of the air flowing into the indoor heat exchanger 15, and defining one side (left side) of the air passage P. Hereinafter, the surface of the holder substrate 41 that faces the fins 31 of each heat exchanger 30, i.e., the surface inside the air passage P, may be referred to as the first surface 41s1, and the surface opposite the first surface 41s1, i.e., the surface outside the air passage P, may be referred to as the second surface 41s2. In Fig. 6, the right surface of the holder substrate 41 is the first surface 41s1 that faces the fins 31, and the left surface of the holder substrate 41 is the second surface 41s2 that faces the left side surface portion 72 of the design case 7.

[0046] 7 and 8, the insertion hole 41h is provided in the holder substrate 41 at a position facing two through holes 31h of the fin 31 in which two straight pipe portions 32a connected to the folded portion 32b to be inserted into the insertion hole 41h are arranged. More specifically, the insertion hole 41h is an elongated bundle-shaped hole that is long in the arrangement direction of the two opposing circular through holes 31h. The insertion hole 41h of the present disclosure includes a drainage hole for condensation water (a drainage portion 41hd described later) at the bottom of the insertion hole 41h.

[0047] In the indoor heat exchanger unit 3 shown in Figures 7 and 8, three rows of through holes 31h are provided in the longitudinal direction of the fins 31 of each heat exchange section 30 between a first edge portion 31e1 and a second edge portion 31e2 extending in the longitudinal direction of the fins 31. Three rows of straight pipe portions 32a are also provided in the longitudinal direction of the fins 31, and two adjacent straight pipe portions 32a in the same row are connected by a folded portion 32b, making the heat transfer tubes 32 serpentine. Three rows of folded portions 32b are also provided corresponding to the rows of through holes 31h provided in the fins 31. Therefore, three rows of insertion holes 41h into which the folded portions 32b are inserted are provided in the holder substrate 41.

[0048] Here, the first edge 31e1 of the fin 31 refers to the edge closer to the fan 17 (see FIG. 2) of two edges extending in the longitudinal direction of the fin 31 in the heat exchange section 30, and the second edge 31e2 of the fin 31 refers to the edge farther from the fan 17. Note that the number of rows of the folded portions 32b, the number of rows of the through holes 31h, and the number of rows of the insertion holes 41h in each heat exchange section 30 are not limited to three, and may be, for example, one row, two rows, or four or more rows.

[0049] 7, a guide wall 42 protruding toward the fin 31 (right side) is provided on the first surface 41s1 of the holder substrate 41 so as to follow the first edge portion 31e1 on the inside of the fin 31. The guide wall 42 guides condensed water flowing from the insertion hole 41h of the holder substrate 41 toward the first surface 41s1 along the upper surface of the guide wall 42 to the front drain pan 61 (see FIG. 2) or the rear drain pan 22u on the rear side. By providing the guide wall 42, it is possible to prevent the condensed water from directly dropping and scattering within the housing 1.

[0050] As shown in FIG. 8, the heat exchanger holding component 40 has a hook 43 that holds the upper portion of the folded portion 32b. As shown in FIGS. 9 and 10, the hook 43 protrudes from the second surface 41s2 of the holder substrate 41 and has a curved shape, such as a U-shape or a generally arc-like shape, that fits along the upper edge of the insertion hole 41h. Here, the upper edge of the insertion hole 41h refers to the portion including the upper end 41hu, which is the uppermost portion of the periphery of the insertion hole 41h on the second surface 41s2. As shown in FIG. 11, the hook 43 holds the upper portion of the folded portion 32b that is inserted into the insertion hole 41h of the holder substrate 41 and protrudes from the second surface 41s2.

[0051] An example of the configuration of the hook 43 will be described. As shown in FIG. 10 , the hook 43 is formed into a downward U-shape by a pair of curved hook pieces that face each other and extend along a portion of the periphery of the insertion hole 41h from an end 41he located at the upper end in the longitudinal direction of the insertion hole 41h on the second surface 41s2. In FIG. 10 , the hook 43 is formed by a pair of curved hook pieces that extend from an upper end 41he in the longitudinal direction of the insertion hole 41h to the front and rear. The hook pieces are connected to each other at an upper end 41he in the longitudinal direction of the insertion hole 41h, and each hook piece extends downward. Here, the insertion hole 41h shown in FIG. 10 is arranged so that the longitudinal direction of the insertion hole 41h is the up-down direction (direction of arrow Z), and therefore the upper end 41he of the longitudinal end of the insertion hole 41h coincides with the upper end 41hu of the insertion hole 41h.

[0052] The hook 43 is composed of a fixed piece 43b connected to the second surface 41s2 of the holder substrate 41 and a free piece 43a spaced apart from the holder substrate 41 and pressing the folded portion 32b toward the fixed piece 43b. That is, as shown in FIGS. 9 to 11, the holder substrate 41 and the free piece 43a of the hook 43 are separated, and a gap 41g is formed between the holder substrate 41 and the free piece 43a of the hook 43. In FIGS. 9 and 10, the rear hook piece of the pair of hook pieces is the fixed piece 43b, and the front hook piece is the free piece 43a. A tip end 43ae of the free piece 43a is inclined toward the fixed piece 43b (rear side) so as to protrude inward beyond the periphery of the insertion hole 41h.

[0053] When the folded portion 32b is inserted into the insertion hole 41h of the holder substrate 41, the front side surface of the upper part of the folded portion 32b comes into contact with the inner surface (rear surface) of the tip end 43ae of the free piece 43a, and the tip end 43ae of the free piece 43a is pushed outward (frontward), thereby elastically deforming the free piece 43a of the hook 43. Therefore, the upper part of the folded portion 32b is pushed toward the fixed piece 43b (rearward) by the restoring force of the free piece 43a, and the upper part of the folded portion 32b is sandwiched and held between the fixed piece 43b and the free piece 43a.

[0054] The free piece 43a and the fixed piece 43b do not need to have the same length in the vertical direction (arrow Z direction), and may have different lengths as long as they can sandwich the folded-back portion 32b. In Fig. 9, the fixed piece 43b is shorter than the free piece 43a. In this case, the contact area between the hook 43 and the folded-back portion 32b can be reduced by the amount of the shortened fixed piece 43b, thereby preventing a decrease in drainage performance due to condensation water remaining between the hook 43 and the folded-back portion 32b.

[0055] 12, a claw portion 43c is formed on the inner surface (rear surface) of the tip portion 43ae of the free piece 43a, protruding toward the fixed piece 43b (rear side). When the hook 43 holds the folded portion 32b, the claw portion 43c is disposed in the space 32g formed between the two ends of the U-shaped folded portion 32b. The claw portion 43c is caught on the folded portion 32b, thereby preventing the folded portion 32b from falling out of the insertion hole 41h.

[0056] The configuration of the hook 43 is not limited to the above. For example, as shown in FIG. 10 , the hook 143 provided on the right side of the U-shaped hook 43 may have a curved shape extending in one direction from the upper end 41he of the insertion hole 41h in the longitudinal direction so as to follow a portion of the periphery. The curved hook 143 is connected to the second surface 41s2 of the holder substrate 41 at the upper end 41he of the insertion hole 41h in the longitudinal direction. The tip of the hook 143 is spaced from the holder substrate 41 and is inclined to protrude inward (rearward) from the periphery of the insertion hole 41h. The tip of the hook 143 presses the upper portion of the folded portion 32b against a portion of the inner circumferential surface of the insertion hole 41h that faces the tip of the hook 143 (the rear portion of the inner circumferential surface), thereby holding the upper portion of the folded portion 32b.

[0057] 10, a protrusion 45 is provided on the outer side (front side) of the tip 43ae of the free piece 43a of the hook 43 on the second surface 41s2 of the holder substrate 41. The protrusion 45 functions as a stopper for the free piece 43a of the hook 43, and prevents the free piece 43a from opening outward excessively and breaking.

[0058] As shown in FIGS. 8 to 10, the heat exchanger holding component 40 has a partition wall 47 extending in the front-to-rear direction (the direction of the arrow Y) on the second surface 41s2 of the holder substrate 41 so as to separate two insertion holes 41h arranged above and below. Specifically, the partition wall 47 is provided between the lower end of the upper one of the two insertion holes 41h and the hook 43 provided on the upper edge of the lower insertion hole 41h. The partition wall 47 has an inclined wall portion 47a inclined in the front-to-rear direction (the direction of the arrow Y) and functions to promote drainage of condensation water. The inclined wall portion 47a extends at an inclination downward toward the lower portion of the drainage portion 41hd (see FIGS. 9 and 10). As shown in FIG. 8, a plurality of partition walls 47 are provided radially on the second surface 41s2 of the holder substrate 41.

[0059] 9, 10, and 12, the partition wall 47 has a blocking wall portion 47b protruding from the upper surface of the inclined wall portion 47a outside the lower portion of the insertion hole 41h (front side in FIG. 9). The blocking wall portion 47b is provided downstream of the drainage portion 41hd in the flow direction of condensation water flowing on the upper surface of the inclined wall portion 47a (front side in FIG. 9), and blocks the condensation water flowing on the upper surface of the inclined wall portion 47a. Also, as shown in FIGS. 9 to 12, the partition wall 47 has a side wall portion 47c provided on the edge of the upper surface of the inclined wall portion 47a farther from the second surface 41s2 so as to cover the lower portion of the insertion hole 41h, i.e., the drainage portion 41hd. One end of the side wall 47c is connected to the blocking wall 47b, and the side wall 47c prevents condensation water that flows along the upper surface of the inclined wall 47a and is blocked by the blocking wall 47b from splashing sideways. In this way, the blocking wall 47b and the side wall 47c are provided, which promotes the flow of condensation water from the second surface 41s2 side to the first surface 41s1 side of the holder substrate 41 through the lower part of the insertion hole 41h (a drainage part 41hd described later).

[0060] The partition wall 47 may have a sawtooth shape in which inclined wall portions 47a and blocking wall portions 47b are alternately connected, as in the partition wall 47 shown in the upper part of Fig. 9. Alternatively, the partition wall 47 may be configured with a single inclined wall portion 47a that is inclined from an inner edge portion 41i on the inside of the holder substrate 41 that is close to the blower 17 (see Fig. 2) toward the outside (the front side in Fig. 9), as in the partition wall 47 shown in the lower part of Fig. 9. In this case, the hook 43 of the insertion hole 41h provided on the lower side of the inclined wall portion 47a may be connected to the inclined wall portion 47a, and the hook 43 may serve as a blocking wall portion 47b for the insertion hole 41h provided on the upper side of the inclined wall portion 47a.

[0061] 9 and 10, a drainage portion 41hd is provided below the insertion hole 41h. More specifically, the insertion hole 41h has a piping region 41hp (see FIG. 10) having a rectangular shape with rounded corners in which the folded portion 32b held by the hook 43 is disposed, and a drainage portion 41hd provided below the piping region 41hp. For example, by providing a gap of 3 mm or more between the upper surface of the inclined wall portion 47a of the partition wall 47 and the lower end of the folded portion 32b, condensed water can easily flow into the drainage portion 41hd.

[0062] The upper part of the folded portion 32b inserted into the insertion hole 41h is held by a hook 43, and a drainage section 41hd is provided below the piping area 41hp in the insertion hole 41h. This configuration makes it difficult for dew to accumulate below the insertion hole 41h, thereby improving the drainage of condensation water formed in the folded portion 32b compared to conventional methods.

[0063] 9 and 10, the drainage portion 41hd is provided below the piping region 41hp and extends forward, and the insertion hole 41h is generally L-shaped. Also, in the example of Figures 9 and 10, the lower end surface 41hb of the insertion hole 41h that forms the drainage portion 41hd is inclined in the front-to-rear direction (the direction of arrow Y) along the inclined wall portion 47a of the partition wall 47 provided below the insertion hole 41h.

[0064] The drainage portion 41hd and the partition wall 47 are connected flush with each other in the horizontal direction (arrow X direction), allowing condensation water to flow smoothly from the second surface 41s2 side to the first surface 41s1 side of the holder substrate 41. More specifically, the lower end surface 41hb of the insertion hole 41h and the upper surface of the inclined wall portion 47a of the partition wall 47 are connected flush with each other in the horizontal direction (arrow X direction), and the front end surface of the drainage portion 41hd extending forward and the blocking wall portion 47b of the partition wall 47 are connected flush with each other in the horizontal direction (arrow X direction).

[0065] 10, the second surface 41s2 of the holder substrate 41 has an extension wall 44 that extends upward from an end 41he that is an end in the longitudinal direction of the insertion hole 41h and is located on the upper side in the vertical direction (arrow Z direction), and connects the hook 43 to the upper partition wall 47. In the above two configuration examples in which a portion of the hook 43, 143 is separated from the holder substrate 41, providing the extension wall 44 increases the number of connection portions between the hook 43 and the holder substrate 41, and the hook 43 can be reinforced.

[0066] The process by which condensation occurs on the heat transfer tube 32 and the flow of condensed water in the heat exchanger holding component will be described below with reference to Figures 6 and 10. When the air conditioner 100 (see Figure 5) performs cooling operation and the indoor heat exchanger 15 acts as an evaporator, the heat transfer tube 32 is cooled by the refrigerant flowing inside the heat transfer tube 32. At this time, if the humidity around the heat transfer tube 32 is high, condensation may occur on the surface of the heat transfer tube 32. Condensation also occurs at the folded-back portion 32b of the heat transfer tube 32, and the amount of condensed water gradually increases as the cooling operation continues.

[0067] When the amount of condensed water 50 generated at the folded portion 32b of the heat transfer tube 32 increases, the condensed water adheres to the second surface 41s2 side of the holder substrate 41, straddling the folded portion 32b of the heat transfer tube 32 and the hook 43 of the heat exchanger holding component 40 shown in FIG. 10. In the present disclosure, the folded portion 32b is held by the hook 43 provided on the upper edge of the insertion hole 41h, so that the condensed water moves downward by gravity along the hook piece of the hook 43 and falls from the lower end of the hook piece to the bottom of the insertion hole 41h. The condensed water that falls to the bottom of the insertion hole 41h flows from the second surface 41s2 side to the first surface 41s1 side via the drainage portion 41hd below the folded portion 32b. At this time, condensation water from the lower ends of the hook pieces falls onto the partition wall 47 provided below the insertion hole 41h, but because the partition wall 47 has the inclined wall portion 47a, the condensation water does not accumulate in front of the inclined wall portion 47a and is guided to the drainage portion 41hd. The condensation water that flows toward the first surface 41s1 via the drainage portion 41hd moves downward along the guide wall 42 and is drained into the drain pan 61 or the rear drain pan 22u disposed below the heat exchanger holding component 40. Unlike a conventional configuration in which a wall portion is provided around the entire periphery of the folded portion 32b, in the present disclosure, the folded portion 32b is held by the hooks 43 on the upper edge of the insertion hole 41h, and a drainage portion 41hd is provided below the folded portion 32b in the insertion hole 41h. Therefore, in the heat exchanger holding component 40 of the present disclosure, dew pools are not formed between the folded portion 32b and the hook 43, and corrosion of the heat transfer tube 32 caused by continued contact between the condensed water and the folded portion 32b can be suppressed.

[0068] As described above, the indoor heat exchanger unit 3 according to the first embodiment includes a plurality of fins 31 arranged at intervals in one direction (the direction of the arrow X), and heat transfer tubes 32 that penetrate the plurality of fins 31 and have folded-back portions 32b that fold back at the end in the one direction. The indoor heat exchanger unit 3 also includes a heat exchanger holding component 40 that is provided at the end in the one direction (for example, the left end) of the heat transfer tubes 32 and has a plate-shaped holder substrate 41 that has an insertion hole 41h into which the folded-back portion 32b is inserted. The heat exchanger holding component 40 has a hook 43 that protrudes from a second surface 41s2 of the holder substrate 41 that is opposite a first surface 41s1 that faces the fins 31 and is provided at the upper edge of the insertion hole 41h to hold an upper portion of the folded-back portion 32b. The insertion hole 41h includes a piping area 41hp having a rectangular shape with rounded corners in which the folded portion 32b held by the hook 43 is arranged, and a drainage hole (drainage portion 41hd) provided below the piping area 41hp in communication with the piping area 41hp.

[0069] In the present disclosure, the hooks 43 that hold the folded portion 32b of the heat transfer tube 32 are provided on the upper edge of the insertion hole 41h, and a drain hole (drain portion 41hd) is provided in the insertion hole 41h below the piping region 41hp. As a result, condensation water generated at the folded portion 32b flows downward from the hooks 43 by gravity and is drained to the outside of the heat exchanger holding component 40 via the drain portion 41hd, making it difficult for dew to accumulate in contact with the folded portion 32b. This makes it possible to suppress corrosion of the heat transfer tube 32 due to condensation water remaining in the heat exchanger holding component 40, and to achieve a longer lifespan of the indoor heat exchanger unit 3.

[0070] The indoor heat exchanger unit 3 also includes an inclined wall portion 47a that protrudes from the second surface 41s2 of the holder substrate 41 and extends at an inclination downward toward the bottom of the drain hole (drain portion 41hd). The inclined wall portion 47a guides condensation water that has fallen from the hooks 43 to the drain portion 41hd without causing dew accumulation, thereby facilitating drainage.

[0071] The indoor heat exchanger unit 3 also includes a blocking wall 47b that protrudes from the upper surface of the inclined wall 47a and is provided downstream of the drain hole (drainage portion 41hd) in the direction of condensation water flowing along the upper surface of the inclined wall 47a to block the condensation water. This makes it easier for the condensation water to enter the drainage portion 41hd through the blocking wall 47b, thereby facilitating drainage.

[0072] The indoor heat exchanger unit 3 also includes a side wall 47c connected to the blocking wall 47b, which is provided on the edge of the upper surface of the inclined wall 47a farther from the second surface 41s2 so as to cover the drainage section 41hd. This makes it possible to guide the condensation water blocked by the blocking wall 47b to the drainage section 41hd while preventing it from splashing, further accelerating drainage.

[0073] The hook 43 has a downward U-shape and includes a fixed piece 43b and a free piece 43a that face each other and extend along a portion of the periphery of the insertion hole 41h from the upper end 41he of the insertion hole 41h in the longitudinal direction of the insertion hole 41h on the second surface 41s2 of the holder substrate 41. The fixed piece 43b is connected to the second surface 41s2 of the holder substrate 41, and the free piece 43a is spaced apart from the holder substrate 41. The hook 43 holds the upper part of the folded portion 32b inserted into the insertion hole 41h by sandwiching it between the free piece 43a and the fixed piece 43b. This allows for a hook 43 with a simple structure that holds the upper part of the folded portion 32b and is less likely to collect condensation.

[0074] The hook 143 has a curved shape that extends in one direction from the upper end 41he in the longitudinal direction of the insertion hole 41h to follow a portion of the periphery of the insertion hole 41h on the second surface 41s2 of the holder substrate 41. The tip of the hook 143 is provided at a distance from the holder substrate 41, and holds the upper part of the folded portion 32b inserted into the insertion hole 41h by pressing it against a portion of the inner circumferential surface of the insertion hole 41h that faces the tip of the hook 143. This makes it possible to realize a hook 143 with a simple structure that holds the upper part of the folded portion 32b and is less likely to collect dew.

[0075] The indoor heat exchanger unit 3 also includes an extension wall 44 that protrudes from the second surface 41s2 of the holder substrate 41 and extends upward from the hooks 43, 143. This increases the number of connection portions between the hooks 43, 143 and the holder substrate 41, thereby reinforcing the hooks 43, 143.

[0076] The indoor unit 10A of the air conditioner according to the first embodiment includes the above-described indoor heat exchanger unit 3 and a blower 17 that supplies indoor air to the indoor heat exchanger 15, which is made up of a plurality of fins 31 and heat transfer tubes 32 of the indoor heat exchanger unit 3. The indoor heat exchanger 15 is made up of a plurality of heat exchange sections 30 (for example, a front heat exchange section 30f and a rear heat exchange section 30b) that are arranged along the outer peripheral surface of the blower 17. The heat exchanger holding component 40 supports the heat transfer tubes 32 at one end of the plurality of heat exchange sections 30. This can improve the reliability of the indoor unit 10A of the air conditioner. [Explanation of symbols]

[0077] REFERENCE SIGNS LIST 1 Housing, 2 Rear case, 3 Indoor heat exchanger unit, 5 Electrical equipment box, 6 Air outlet structure, 7 Design case, 7a Intake port, 7b Air outlet, 8 Front panel, 9 Automatic cleaning mechanism, 10A Indoor unit, 10B Outdoor unit, 11 Compressor, 12 Flow path switching device, 13 Outdoor heat exchanger, 14 Expansion section, 15 Indoor heat exchanger, 16 Outdoor blower, 17 Blower, 17a Fan shaft, 18 Refrigerant piping, 18a Refrigerant piping, 21 Rear section, 22 Air passage component, 22u Rear drain pan, 23 Fan support section, 23a Plate-shaped member, 23b Plate-shaped member, 23br Recess, 30 Heat exchange section, 30b Rear heat exchange section, 30f Front heat exchange section, 30f1 Front section, 30f2 Sloped wall section, 31 Fin, 31e1 first edge portion, 31e2 second edge portion, 31h through hole, 32 heat transfer tube, 32a straight pipe portion, 32b folded portion, 32g space, 40 heat exchanger holding part, 41 holder base, 41g gap, 41h insertion hole, 41hb lower end surface, 41hd drainage portion, 41he end portion, 41hp piping area, 41hu upper end, 41i inner edge portion, 41r recess, 41s1 first surface, 41s2 second surface, 42 guide wall, 43 hook, 43a free piece, 43ae tip portion, 43b fixing piece, 43c claw portion, 44 extension wall, 45 protrusion portion, 47 partition wall, 47a inclined wall portion, 47b damming wall portion, 47c side wall portion, 50 Condensation water, 61 drain pan, 61b underside, 63 air deflector, 63a left and right air deflectors, 63b up and down air deflectors, 71 front frame, 71a front upper frame, 71b inclined lower frame, 71o front opening, 72 left side surface, 73 right side surface, 74 left upper surface, 75 right upper surface, 90 filter, 91 filter support, 92 dust box, 100 air conditioner, 143 hook, P air duct, RC refrigerant circuit.

Claims

1. a plurality of fins arranged at intervals in one direction; a heat transfer tube that passes through the plurality of fins and has a folded portion that is folded back at an end portion in the one direction; a heat exchanger holding component provided at the end of the heat transfer tube in the one direction, the heat exchanger holding component having a plate-shaped holder substrate having an insertion hole into which the folded portion is inserted, The heat exchanger holding part is a hook that protrudes from a second surface of the holder substrate opposite to a first surface facing the fin, the hook being provided at an upper edge of the insertion hole and that holds an upper portion of the folded portion; the insertion hole includes a piping area having a rectangular shape with rounded corners in which the folded portion held by the hook is arranged, and a drainage hole provided below the piping area and communicating with the piping area, The heat exchanger holding part is a sloped wall portion that projects from the second surface of the holder substrate and extends downwardly toward a lower portion of the drainage hole; Indoor heat exchanger unit.

2. a blocking wall portion that projects from the upper surface of the inclined wall portion and is provided downstream of the drain hole in the flow direction of condensation water flowing on the upper surface, and that blocks the condensation water; The indoor heat exchanger unit according to claim 1 .

3. a side wall portion provided on an edge portion of the upper surface of the inclined wall portion farther from the second surface so as to cover the drain hole and connected to the blocking wall portion; The indoor heat exchanger unit according to claim 2 .

4. the hook is formed in a downward U-shape and has a fixed piece and a free piece that face each other and extend from an upper end of the longitudinal direction of the insertion hole to both sides along a part of the peripheral edge of the insertion hole in the second surface of the holder substrate, the fixing piece is provided so as to be connected to the second surface of the holder substrate, the free piece is provided at a distance from the holder substrate, The hook holds the upper part of the folded portion inserted into the insertion hole by pinching it between the free piece and the fixed piece. The indoor heat exchanger unit according to any one of claims 1 to 3.

5. the hook has a curved shape extending in one direction from an upper end of a peripheral portion of the insertion hole in the longitudinal direction of the insertion hole on the second surface of the holder substrate so as to follow a part of the peripheral portion, The tip of the hook is provided at a distance from the holder substrate, and is held by pressing an upper portion of the folded portion inserted into the insertion hole against a portion of the inner circumferential surface of the insertion hole that faces the tip of the hook. The indoor heat exchanger unit according to any one of claims 1 to 3.

6. an extension wall that is provided to protrude from the second surface of the holder base plate and extends upward from the hook; The indoor heat exchanger unit according to any one of claims 1 to 3.

7. An indoor heat exchanger unit according to any one of claims 1 to 3; a blower that supplies indoor air to an indoor heat exchanger configured by the plurality of fins and the heat transfer tube of the indoor heat exchanger unit, the indoor heat exchanger is composed of a plurality of heat exchange units arranged along an outer peripheral surface of the blower, The heat exchanger holding component supports the heat transfer tubes at the ends of the plurality of heat exchange sections in one direction. Air conditioner indoor unit.

Images