JP2009008285A - Air conditioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor machine of an air conditioning device capable of being miniaturized. <P>SOLUTION: The indoor machine 1 of this air conditioning device 100 comprises an indoor heat exchanger 10 and a prefilter 30. The indoor heat exchanger 10 exchanges heat with the air passing therethrough. The prefilter 30 purifies the passing air. Further at least a part of the prefilter 30 is mounted to be kept into contact with a windward-side surface of the indoor heat exchanger 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an indoor unit of an air conditioner including a heat exchanger and a filter, and more particularly to an indoor unit of an air conditioner in which at least a part of the heat exchanger and the filter are in contact.

Many conventional indoor units of an air conditioner have a filter disposed between an indoor air intake and a heat exchanger. This filter prevents the heat exchanger from being contaminated by dust floating in the room air by removing the dust in the room air taken in from the room air intake port. For example, in the indoor unit of an air conditioner disclosed in Patent Document 1, the filter is disposed along the heat exchanger.
JP-A-6-221604

  However, in the indoor unit of the air conditioner of Patent Document 1, a gap is provided between the heat exchanger and the filter. For this reason, the size of the indoor unit is increasing.

  The subject of this invention is providing the indoor unit of the air conditioning apparatus which can make a size small.

  The indoor unit of the air conditioning apparatus according to the first aspect of the present invention includes a heat exchanger and a filter. The heat exchanger exchanges heat with the passing air. The filter cleans the passing air. Further, at least a portion of the filter is mounted in contact with the windward surface of the heat exchanger.

  In the indoor unit of the air conditioner according to the first aspect of the invention, at least a part of the filter is in contact with the windward surface of the heat exchanger. For this reason, the clearance gap between a heat exchanger and a filter can be shortened.

  Thereby, the size of the indoor unit of the air conditioner can be reduced.

  An indoor unit of an air conditioner according to a second aspect of the present invention is the indoor unit of the air conditioner of the first aspect, wherein the filter has water repellency at least in a contact portion with the heat exchanger. For this reason, in the contact part of a filter and a heat exchanger, when the condensed water which generate | occur | produced from the heat exchanger adheres to a filter, it becomes easy to roll off from the surface of a filter rapidly.

  Thereby, the possibility that the filter is clogged with condensed water can be reduced.

  An indoor unit of an air conditioner according to a third aspect of the present invention is the indoor unit of the air conditioner of the first or second aspect, wherein the windward surface of the heat exchanger has water repellency at least in contact with the filter. Have. For this reason, the condensed water generated from the heat exchanger quickly flows on the windward surface of the heat exchanger having water repellency, and is guided to the leeward side or below of the heat exchanger. Therefore, the condensed water generated from the heat exchanger is hardly guided to the filter from the heat exchanger.

  Thereby, the possibility that the filter is clogged with condensed water can be further reduced.

  An indoor unit of an air conditioner according to a fourth aspect of the present invention is the indoor unit of the air conditioner of the third aspect, and the heat exchanger has a first heat exchange part and a second heat exchange part. The 1st heat exchange part has hydrophilicity. The second heat exchange part is located on the windward side of the first heat exchange part and has water repellency. Furthermore, the filter is in contact with the windward surface of the second heat exchange unit. Since the condensed water generated in the second heat exchange section is guided to the first heat exchange section located on the leeward side, the condensed water generated in the heat exchanger is more difficult to be guided from the heat exchanger to the filter.

  Thereby, the possibility that the filter is clogged with condensed water can be further reduced.

  An air conditioner indoor unit according to a fifth aspect of the present invention is the air conditioner indoor unit of any one of the first to fourth aspects, further comprising a cleaning mechanism. The cleaning mechanism is located on the windward side of the filter and sucks dust adhering to the heat exchanger and the filter. For this reason, a heat exchanger and a filter can be cleaned.

  In addition, when the conventional indoor unit is provided with a cleaning mechanism inside thereof, the conventional indoor unit is provided with a gap between the filter and the heat exchanger. For this reason, the size of the indoor unit may increase. However, in this indoor unit, the gap between the filter and the heat exchanger is reduced. Therefore, when the cleaning mechanism is provided inside the indoor unit, the size of the indoor unit can be reduced as compared with the case where the cleaning mechanism is provided inside the conventional indoor unit.

  An indoor unit of an air conditioner according to a sixth aspect of the present invention is the indoor unit of the air conditioner of the fifth aspect, wherein the cleaning mechanism has an intake / exhaust unit including an intake / exhaust part and a fan. An intake port is formed in the intake / exhaust portion. A fan is arrange | positioned inside an intake / exhaust part, and attracts the deposits adhering to a heat exchanger and a filter from the inlet to the internal space of an intake / exhaust part. The suction port is disposed at a contact portion where at least the heat exchanger and the filter are in contact.

  In the indoor unit of the air conditioner according to the sixth aspect of the invention, the intake port of the intake / exhaust device is disposed at least at the contact portion where the heat exchanger and the filter are in contact. For this reason, the deposits can be simultaneously sucked into the internal space of the intake / exhaust section from the heat exchanger and the filter.

  Thereby, deposits can be sucked from both the heat exchanger and the filter.

  An indoor unit of an air conditioner according to a seventh aspect of the present invention is the indoor unit of the air conditioner of the sixth aspect, wherein the cleaning mechanism further includes a dust collecting part. The dust collecting unit collects dust sucked by the fan.

  In the indoor unit of the air conditioner according to the seventh aspect of the present invention, the cleaning mechanism has a dust collecting unit that collects dust when the dust attached to the heat exchanger and the filter is sucked by the fan. For this reason, the dust adhering to a heat exchanger and a filter can be collected simultaneously.

  Thereby, dust can be collected from both the heat exchanger and the filter.

  An indoor unit of an air conditioner according to an eighth aspect is the indoor unit of an air conditioner according to the seventh aspect, wherein the cleaning mechanism further includes a dust removing unit. The dust removing unit removes the dust collected by the dust collecting unit from the dust collecting unit. For this reason, the effort which cleans a dust collection part can be reduced.

  An indoor unit of an air conditioner according to a ninth aspect of the present invention is the indoor unit of the air conditioner according to any of the fifth to eighth aspects of the present invention, wherein the cleaning mechanism further includes a moisture trap. The moisture trapping part traps moisture sucked by the fan.

  In the indoor unit of the air conditioner according to the ninth aspect of the invention, the cleaning mechanism has a moisture capturing part inside the intake / exhaust part. For this reason, the moisture sucked from the filter and the heat exchanger can be captured.

  This can reduce the possibility of moisture entering the exhaust.

  An indoor unit for an air conditioner according to a tenth aspect of the present invention is the indoor unit for an air conditioner according to any of the sixth to ninth aspects, wherein at least a part of the intake / exhaust portion of the cleaning mechanism is made of a water permeable material. . For this reason, the moisture sucked into the internal space of the intake / exhaust portion from the suction port is discharged from the water-permeable portion of the intake / exhaust portion to the outside of the intake / exhaust portion.

  As a result, it is possible to make it difficult to collect moisture in the intake / exhaust device.

  An indoor unit for an air conditioner according to an eleventh aspect of the invention is the indoor unit for an air conditioner according to any of the sixth to tenth aspects, wherein the intake / exhaust part of the cleaning mechanism includes a tip nozzle and a fan storage part. . A suction port is formed in the tip nozzle. An exhaust port is formed in the fan storage portion, and a fan is stored inside. At least the tip nozzle can move in the vicinity of the filter. Since the suction port is disposed at least in a contact portion where the heat exchanger and the filter are in contact, dust attached to the filter and the heat exchanger can be removed by moving at least the tip nozzle.

  In the indoor unit of the air conditioner according to the first aspect of the invention, the size can be reduced.

  In the indoor unit of the air conditioner according to the second aspect, the possibility of clogging the filter with condensed water can be reduced.

  In the indoor unit of the air conditioner according to the third aspect, the possibility of clogging the filter with condensed water can be further reduced.

  In the indoor unit of the air conditioner according to the fourth aspect of the present invention, the possibility of clogging the filter with condensed water can be further reduced.

  In the indoor unit of the air conditioning apparatus according to the fifth aspect, the heat exchanger and the filter can be cleaned.

  In the indoor unit of the air conditioner according to the sixth aspect of the invention, the deposits can be sucked from both the heat exchanger and the filter.

  In the indoor unit of the air conditioner according to the seventh aspect of the invention, dust can be collected from both the heat exchanger and the filter.

  In the indoor unit of the air conditioner according to the eighth aspect of the present invention, the labor required for cleaning the dust collecting part can be reduced.

  In the indoor unit of the air conditioning apparatus according to the ninth aspect, the possibility of moisture entering the exhaust can be reduced.

  In the indoor unit for an air conditioner according to the tenth aspect of the present invention, it is possible to make it difficult for moisture to accumulate in the intake / exhaust device.

  In the indoor unit of the air conditioning apparatus according to the eleventh aspect, dust attached to the filter and the heat exchanger can be removed by moving at least the tip nozzle.

<Appearance of air conditioner>
FIG. 1 shows an air conditioner 100 including an indoor unit 1 according to an embodiment of the present invention. The air conditioner 100 includes an indoor unit 1 attached to an indoor wall surface and the like, and an outdoor unit 3 installed outside the room.

  As shown in FIGS. 2 and 3, an indoor heat exchanger 10 is accommodated in the indoor unit 1, and an outdoor heat exchanger 20 is accommodated in the outdoor unit 3. Are connected by refrigerant piping to constitute a refrigerant circuit.

<Outline of configuration of refrigerant circuit of air conditioner>
The structure of the refrigerant circuit of the air conditioning apparatus 100 is shown in FIG. This refrigerant circuit mainly includes an indoor heat exchanger 10, an accumulator 21, a compressor 22, a four-way switching valve 23, an outdoor heat exchanger 20, and an electric expansion valve 24.

  The indoor heat exchanger 10 provided in the indoor unit 1 performs heat exchange with indoor air that comes into contact therewith. The indoor unit 1 is provided with a cross flow fan 11. The cross flow fan 11 sucks indoor air, passes it through the indoor heat exchanger 10, and discharges the air after the heat exchange is performed into the room. The cross flow fan 11 has a substantially cylindrical shape, and is provided with blades in the direction of the rotation axis on the peripheral surface thereof, and generates an air flow in a direction intersecting with the rotation axis. The cross flow fan 11 is rotationally driven by an indoor fan motor 12 provided in the indoor unit 1. The detailed configuration of the indoor unit 1 will be described later.

  The outdoor unit 3 is connected to a compressor 22, a four-way switching valve 23 connected to the discharge side of the compressor 22, an accumulator 21 connected to the suction side of the compressor 22, and a four-way switching valve 23. The outdoor heat exchanger 20 and the electric expansion valve 24 connected to the outdoor heat exchanger 20 are provided. The electric expansion valve 24 is connected to the liquid communication pipe 26a via the liquid closing valve 26, and is connected to one end of the indoor heat exchanger 10 via the liquid communication pipe 26a. The four-way switching valve 23 is connected to a gas communication pipe 27a via a gas closing valve 27, and is connected to the other end of the indoor heat exchanger 10 via this gas communication pipe 27a. In addition, the outdoor unit 3 is provided with a propeller fan 28 for discharging the air after heat exchange by the outdoor heat exchanger 20 to the outside. The propeller fan 28 is rotationally driven by an outdoor fan motor 29.

<Configuration of indoor unit>
As shown in FIG. 1, the indoor unit 1 includes an indoor unit casing 2 that is long in the horizontal direction. In the indoor unit casing 2, in addition to the indoor heat exchanger 10 described above, a prefilter 30, a cleaning device 60, and the like are accommodated.

[Indoor unit casing]
As shown in FIGS. 1 and 3, the indoor unit casing 2 includes an upper surface 6, a lower surface 7, a front surface 8, a side surface 9, and a back surface 5. The upper surface 6 covers the upper side of the indoor heat exchanger 10, and the upper surface 6 is provided with an indoor air intake 6 a composed of a plurality of slit-shaped openings. The lower surface 7 covers the lower side of the indoor heat exchanger 10 and the cross flow fan 11, and the lower surface 7 is provided with an indoor air outlet 7 a formed of an opening along the longitudinal direction of the indoor unit 1. The indoor air outlet 7a is provided with a horizontal flap 7b for guiding the air blown into the room. The horizontal flap 7b is rotatably provided around an axis parallel to the longitudinal direction of the indoor unit 1, and opens and closes the indoor air outlet 7a by rotating by a flap motor (not shown). Can do. The front surface 8 is formed substantially flat and covers the front of the indoor heat exchanger 10. The side surface 9 covers the side of the indoor heat exchanger 10. The back surface 5 constitutes the back surface of the indoor unit 1 and covers the back of the indoor heat exchanger 10.

  As shown in FIG. 3, a drain pan 7c for receiving water droplets generated on the surface of the indoor heat exchanger 10 during heat exchange is provided below the indoor heat exchanger 10. A drain hose (not shown) for discharging the received water droplets to the outside is attached to the drain pan 7c. Since the indoor heat exchanger 10 acts as an evaporator during the cooling operation, moisture contained in the air in contact with the indoor heat exchanger 10 is condensed in the indoor heat exchanger 10 and dropped as water droplets. The drain pan 7c is configured to receive such water droplets and discharge them with a drain hose.

[Indoor heat exchanger]
The indoor heat exchanger 10 has a shape that is long in the horizontal direction, and is disposed in parallel to the longitudinal direction of the indoor unit casing 2. The indoor heat exchanger 10 is attached so as to surround the front, upper and rear upper portions of the cross flow fan 11. Furthermore, the indoor heat exchanger 10 includes a main body heat exchanger 13 having a substantially inverted V-shaped cross-sectional shape in a side view and an auxiliary heat exchanger 18 disposed on the outer surface side of the main body heat exchanger 13. And have.

  As shown in FIG. 3, the main body heat exchanger 13 includes four parts, a first main body heat exchanger 14, a second main body heat exchanger 15, a third main body heat exchanger 16, and a fourth main body heat exchanger 17. The main body heat exchangers 14, 15, 16, and 17 are connected to each other.

  As shown in FIG. 4, each of the main body heat exchangers 14, 15, 16, and 17 has a plate-like shape that is long in the horizontal direction. Further, as shown in FIGS. 3 and 4, each of the main body heat exchangers 14, 15, 16, and 17 includes a heat transfer tube 10 a that is bent back and forth at both ends, and a plurality of fins through which the heat transfer tube 10 a is inserted. 10b. The heat transfer tubes 10a are arranged in parallel to the longitudinal direction of the main body heat exchangers 14, 15, 16, and 17, and are folded back by U-shaped heat transfer tubes 10c at both side ends of the main body heat exchangers 14, 15, 16, and 17. It is. The U-shaped heat transfer tubes 10 c protrude from both side surfaces of the main body heat exchangers 14, 15, 16, and 17 toward the longitudinal direction of the indoor heat exchanger 10. The fin 10b is a strip-like thin metal plate. In each of the main body heat exchangers 14, 15, 16, and 17, a plurality of fins 10b and fixing plates (not shown) on both sides thereof are arranged in parallel with each other at a predetermined interval, and fixed to the plurality of fins 10b. A heat transfer tube 10a is vertically inserted through the plate.

  The first main body heat exchanger 14 constitutes the rear upper part of the indoor heat exchanger 10. The first main body heat exchanger 14 is disposed so as to be inclined so that the upper end is positioned forward of the lower end, and is disposed so as to cover the rear upper portion of the cross flow fan 11.

  The second main body heat exchanger 15 constitutes a front upper portion of the indoor heat exchanger 10. The second main body heat exchanger 15 is disposed so as to be inclined so that the upper end is located on the rear side of the lower end, and is disposed so as to cover the upper side of the cross flow fan 11. Further, the upper end of the second main body heat exchanger 15 and the upper end of the first main body heat exchanger 14 are joined. That is, the 2nd main body heat exchanger 15 and the 1st main body heat exchanger 14 are combined so that it may become an inverted V shape in side view.

  The third main body heat exchanger 16 constitutes a front lower end of the indoor heat exchanger 10. The third main body heat exchanger 16 is disposed below the second main body heat exchanger 15 and is disposed so as to cover the front of the cross flow fan 11. The lower end of the second main body heat exchanger 15 and the upper end of the third main body heat exchanger 16 are joined.

  The fourth main body heat exchanger 17 constitutes a front lower end of the indoor heat exchanger 10. The fourth main body heat exchanger 17 is disposed below the third main body heat exchanger 16 and is disposed so as to cover the front of the cross flow fan 11. Further, the lower end of the third main body heat exchanger 16 and the upper end of the fourth main body heat exchanger 17 are joined.

  The main body heat exchanger 13 is formed by the first main body heat exchanger 14, the second main body heat exchanger 15, the third main body heat exchanger 16, and the fourth main body heat exchanger 17 being fixed to each other and integrated. Has been.

  Moreover, the surface of the fin 10b which comprises the main body heat exchanger 13 is coated with the hydrophilic coating material, and the hydrophilic process is performed.

  The auxiliary heat exchanger 18 is a heat exchanger for supplementing the heat exchanging capacity of the main body heat exchanger 13. In the present embodiment, like the main body heat exchanger 13, the auxiliary heat exchanger 18 has a plate shape that is long in the horizontal direction. The heat transfer tube 10a is bent back at both ends, and the fins 10b are inserted through the heat transfer tube 10a. The auxiliary heat exchanger 18 is an outer surface of the second main body heat exchanger 15, the third main body heat exchanger 16, and the fourth main body heat exchanger 17, and is a front surface of each main body heat exchanger 15, 16, 17. It is connected to the side.

  Moreover, the surface of the fin 10b which comprises the auxiliary heat exchanger 18 is coated with a water-repellent paint, and a water-repellent treatment is performed.

[Prefilter]
As shown in FIG. 3, the pre-filter 30 is arranged so as to cover almost the entire front surface side (upstream side of the air flow) of the indoor heat exchanger 10, and flows into the indoor heat exchanger 10. Dust contained in the coming air is removed. Moreover, the pre-filter 30 has the filter part 31 and the support frame 32, as shown in FIG. Note that “left and right” described below means left and right in a front view in a state where the indoor heat exchanger 10 to which the prefilter 30 is attached is provided in the indoor unit 1.

  The filter unit 31 is made of a fluorine-based resin, and the upper and lower ends, the left and right ends, and the center portion thereof are supported by the support frame 32 to remove dust contained in the air. Further, in the present embodiment, the filter unit 31 is formed of a fluorine resin, but may be formed of a water repellent material other than the fluorine resin (for example, a silicon resin). Moreover, since the filter part 31 should just have water repellency on the surface at least, it may be coated with water-repellent materials, such as a fluorine-type coating material and a silicone type coating material. As a result, water droplets falling on the surface of the pre-filter 30 become spherical due to surface tension, and are easy to roll off the upper surface of the pre-filter 30.

  The support frame 32 has an elongated shape having substantially the same dimensions as the dimensions of the indoor heat exchanger 10 in the longitudinal direction. The support frame 32 has a substantially inverted V-shaped cross-sectional shape that is substantially the same shape as the indoor heat exchanger 10 so as to be covered along the indoor heat exchanger 10. The support frame 32 is provided with claw portions 34 at equal intervals along the longitudinal direction and the short direction (see FIG. 3). The claw portion 34 is press-fitted between the fins 10 b constituting the indoor heat exchanger 10, thereby preventing the prefilter 30 from being lifted or displaced. Although only a part of the claw portions 34 are shown in FIG. 3, the claw portions 34 are provided at equal intervals along the longitudinal direction and the short direction of the support frame 32 as described above.

[Cleaning device]
The cleaning device 60 is a mechanism that automatically cleans dust adhering to the pre-filter 30 and the indoor heat exchanger 10 as shown in FIGS. 3, 5, and 6. In the present embodiment, the cleaning device 60 is an indoor unit casing 2. It is arranged inside. The cleaning device 60 includes a cleaning device main body 65, a dust collecting filter 62, and a dust removing device 70.

<Cleaning device body>
As shown in FIGS. 6 and 7, the cleaning device main body 65 includes a device casing 61, a pad member 67 (see FIG. 7B), an eliminator 63, and an intake / exhaust fan 64. The device casing 61 includes a suction nozzle 65a, a suction duct 65b, and a fan casing 65c.

  As shown in FIG. 5, the suction nozzle 65 a is disposed on the windward surface of the prefilter 30 and has a substantially rectangular parallelepiped shape parallel to the longitudinal direction of the prefilter 30 in a front view. As shown in FIGS. 6 and 7, the suction nozzle 65a is formed with a suction port 61a that allows the internal space of the suction nozzle 65a to communicate with the external space of the suction nozzle 65a. The suction port 61a is formed in a surface facing the windward surface of the pre-filter 30 in the suction nozzle 65a (hereinafter, this surface is referred to as an opposing surface), and in the plan view, near the approximate center in the short direction of the opposing surface. Is an opening formed so as to be cut out in a substantially rectangular shape.

  Further, the suction nozzle 65 a is movable along the short side direction of the prefilter 30 on the windward surface of the prefilter 30. Further, the suction nozzle 65a is provided with a rotation shaft, and the opposite surface of the suction nozzle 65a and the opening of the dust box 72 described later are opposed by rotating 90 degrees around the rotation shaft (see FIG. 3).

  Further, at least a part of the suction nozzle 65a is made of a water-permeable member such as a hydrophilic processed porous body.

  The pad member 67 is a substantially rectangular rubber, and is disposed in the vicinity of the suction port 61a. The pad member 67 comes into contact with the prefilter 30 and causes dust to rise from the prefilter 30. In this embodiment, rubber is applied to the pad member 67, but a member having elasticity other than rubber (for example, a sponge) or a brush-like member having a plurality of wires made of resin or the like is applied. May be. In addition, as a member applied to the pad member 67, it is desirable to use a member suitable for the object to be cleaned. Furthermore, the effect of peeling off dust can be further improved by using rubber and a brush-like member in combination as the pad member.

  As shown in FIG. 6, the suction duct 65b is a tube member connected to connect the internal space of the suction nozzle 65a and the internal space of the fan accommodating portion 65c, and sucks from the suction port 61a of the suction nozzle 65a. The air sucked into the internal space of the nozzle 65a is caused to flow into the internal space of the fan housing portion 65c. Further, the suction duct 65b is partially bent, so that the air flow path to the fan housing portion 65c even when the suction nozzle 65a moves on the surface of the prefilter 30 and the position of the suction nozzle 65a changes. Can be formed.

  As shown in FIG. 6, the eliminator 63 has a disk shape, and the dimension thereof is substantially the same as the inner diameter dimension of the suction duct 65b. Further, the eliminator 63 is disposed inside the suction duct 65b. Further, in the present embodiment, the eliminator 63 is disposed in the vicinity of the connection portion between the suction nozzle 65a and the suction duct 65b.

  The fan casing 65c houses the intake / exhaust fan 64 as shown in FIG. The fan casing 65c has an exhaust port 61b opened in the upper right direction and an arc-shaped wall surface portion 61c when viewed from the front.

  The intake / exhaust fan 64 is a sirocco fan that is rotationally driven by an intake / exhaust motor (not shown). The intake / exhaust fan 64 is rotated by an intake / exhaust motor to form an air flow so as to take in air from the intake port 61a and blow out air from the exhaust port 61b.

<Dust collection filter>
As shown in FIGS. 7 and 8, the dust collection filter 62 is housed inside the suction nozzle 65a and arranged to cover the suction port 61a. Further, the dust collection filter 62 is provided with a dust collection filter portion 62a for collecting the dust of the prefilter 30 sucked from the suction port 61a by a suction operation of the intake / exhaust fan 64, and a dust collection filter portion 62a on the inner side. And a filter frame 62b.

  The dust collection filter portion 62a is made of mesh-like stainless steel having a smooth surface and air permeability, and has a substantially rectangular parallelepiped shape with an opening formed on the lower surface as shown in FIG. Moreover, the opening of the dust collection filter part 62a is formed in the substantially same dimension as the opening dimension of the suction inlet 61a formed in the suction nozzle 65a. In this embodiment, mesh-like stainless steel is applied to the dust collection filter portion 62a. However, the material is not limited to stainless steel, and a metal material such as copper or a resin material such as polyethylene terephthalate, polypropylene, or nylon is applied. May be. Furthermore, it is not limited to a mesh shape such as a plain weave or a twill weave, and a non-woven fabric or the like may be applied as long as dust can be collected. In addition, in order to prevent clogging of the dust collecting filter portion 62a due to dust, various types of antifouling treatment such as water repellent treatment or hydrophilic treatment may be performed. In addition, it is desirable that the dust collection filter unit 62a has a finer mesh than the prefilter 30 in order to collect the dust separated from the prefilter 30.

  The filter frame 62b has a substantially rectangular parallelepiped shape with an opening formed on the lower surface, and air passage holes 62c are formed on the side surface and the upper surface of the filter frame 62b. Further, the filter frame 62b receives and supports the dust collection filter portion 62a (see FIG. 8B).

<Dust remover>
As shown in FIG. 9, the dust removing device 70 includes a vibrator 71 and a dust box 72, and automatically removes dust collected by the dust collecting filter 62.

  The vibrator 71 is disposed in the vicinity of the dust collection filter 62, and is disposed inside the suction nozzle 65a in the present embodiment. The vibrator 71 vibrates the dust collection filter 62 by vibrating in the vicinity of the dust collection filter 62. For this reason, the dust adhering to the dust collection filter part 62a is shaken off. In this embodiment, the vibrator 71 is used to remove the dust accumulated in the dust collection filter 62. However, the dust collected in the dust collection filter 62 by rotating the intake / exhaust fan 64 in the reverse direction. May be removed. In this case, by rotating the intake / exhaust fan 64 in the reverse direction, an air flow is formed so that air is taken in from the exhaust port 61b and blown out from the suction port 61a. Thereby, the dust accumulated in the dust collection filter 62 can be removed.

  The dust box 72 is a container for collecting dust shaken off from the dust collection filter portion 62a. As shown in FIG. 3, the dust box 72 has a box shape with an upper surface opened, and is provided below the prefilter 30. In the present embodiment, the dust box 72 is applied as a container for collecting dust shaken off from the dust collecting filter portion 62a. However, instead of the dust box 72, dust may be collected in the drain pan 7c. When dust is collected in the drain pan 7c, the accumulated dust can be drained with drain water and discharged outdoors.

  In the present embodiment, a vibrator 71 and a dust box 72 are used as the dust removing device 70 in order to process the dust collected by the dust collecting filter 62. However, instead of the vibrator 71 and the dust box 72, as a dust removing device, an exhaust nozzle that extends from the inside of the indoor unit 1 to the outside and an exhaust fan that can generate an air flow from the inside of the indoor unit 1 to the outdoor direction are provided. It can also be applied. When an exhaust nozzle and an exhaust fan are applied as a dust removing device, dust collected by the dust collection filter 62 is collected from the inside of the indoor unit 1 through the exhaust nozzle by the air flow generated by the exhaust fan. It can be discharged outside.

<Cleaning operation of the cleaning device>
Hereinafter, the cleaning operation of the pre-filter 30 and the indoor heat exchanger 10 in the cleaning device 60 will be described.

  In the cleaning device 60, when the intake / exhaust motor is driven, the suction nozzle 65 a moves on the windward surface of the pre-filter 30 along the short direction of the pre-filter 30 and adheres to the pre-filter 30 and the indoor heat exchanger 10. Dust is sucked together with air from the suction port 61a. Then, the air sucked from the suction port 61a is sucked into the internal space of the suction nozzle 65a from the air passage hole 62c formed in the filter frame 62b through the dust collecting filter 62. The air sucked into the internal space of the suction nozzle 65a is exhausted from the exhaust port 61b of the fan casing 65c through the suction duct 65b. Note that when the air sucked from the suction port 61a passes through the dust collecting filter 62, dust contained in the air is collected by the dust collecting filter portion 62a.

  Further, when the suction nozzle 65a moves up and down a predetermined number of times (for example, four times, etc.) and collects dust, the suction nozzle 65a includes the opening on the upper surface of the dust box 72 and the suction port 61a of the suction nozzle 65a. And move so that they face each other. Thereafter, the vibrator 71 applies vibration to the dust collecting filter 62. Therefore, the dust collected by the dust collection filter 62 is shaken off by the dust box 72.

  For this reason, the dust adhering to the pre-filter 30 and the indoor heat exchanger 10 can be automatically collected and processed. Thereby, the burden of performing the cleaning work can be reduced.

  The cleaning device 60 is started automatically by a control unit (not shown) or by an external command.

<Features>
(1)
In a conventional air conditioner indoor unit, a pre-filter is disposed between the indoor air intake and the indoor heat exchanger, and a gap is provided between the indoor heat exchanger and the pre-filter. . For this reason, the size of the indoor unit is increasing.

  On the other hand, in the said embodiment, the pre filter 30 and the windward surface of the indoor heat exchanger 10 are contacting. For this reason, the clearance gap between the indoor heat exchanger 10 and the pre filter 30 can be eliminated.

  Thereby, the size of the indoor unit 1 of the air conditioner 100 can be reduced.

(2)
In the above embodiment, the prefilter 30 has water repellency. For this reason, the drain water generated from the indoor heat exchanger 10 can be quickly separated from the surface of the prefilter 30 at the contact portion between the prefilter 30 and the indoor heat exchanger 10.

  This reduces the possibility that the prefilter 30 is clogged with drain water.

(3)
In the said embodiment, the indoor heat exchanger 10 has the main body heat exchanger 13 which has hydrophilic property, and the auxiliary heat exchanger 18 which has water repellency. The auxiliary heat exchanger 18 is the outer surface of the main body heat exchanger 13, and the windward surface thereof and the prefilter 30 are in contact with each other. For this reason, the drain water generated in the auxiliary heat exchanger 18 is guided to the main body heat exchanger 13.

  This reduces the possibility that the prefilter 30 is clogged with drain water.

(4)
A cleaning device 60 is disposed inside the indoor unit casing 2. In the indoor unit 1, the prefilter 30 and the indoor heat exchanger 10 are in contact with each other. For this reason, compared with the case where the cleaning apparatus 60 is arrange | positioned inside the indoor unit in which the clearance gap is provided between the pre filter 30 and the indoor heat exchanger 10, the size of the indoor unit 1 can be made small. is made of.

(5)
In the said embodiment, the suction inlet 61a of the suction nozzle 65a in the cleaning apparatus 60 is arrange | positioned in the contact part which the indoor heat exchanger 10 and the pre filter 30 are contacting. For this reason, dust, drain water, etc. adhering to the indoor heat exchanger 10 and the pre-filter 30 can be sucked into the internal space of the suction nozzle 65a from the suction port 61a.

  Thereby, dust, drain water, etc. can be sucked from both the indoor heat exchanger 10 and the pre-filter 30.

(6)
In the above-described embodiment, the cleaning device 60 includes the dust collection filter 62 that collects the dust separated from the indoor heat exchanger 10 and the prefilter 30. For this reason, the dust peeled off from the indoor heat exchanger 10 and the prefilter 30 can be collected simultaneously.

  Thereby, dust can be collected from both the indoor heat exchanger 10 and the pre-filter 30.

(7)
In the above embodiment, the cleaning device 60 has the dust removing device 70 that automatically removes the dust collected by the dust collecting filter 62. For this reason, dust can be automatically removed from the dust collection filter 62 without contacting the dust collection filter 62.

  Thereby, the labor required for cleaning the dust collecting filter 62 can be reduced.

(8)
In the above embodiment, the cleaning device 60 has the eliminator 63. For this reason, the drain water generated in the indoor heat exchanger 10 can be captured.

  This can reduce the possibility of moisture being mixed into the exhaust.

(9)
In the said embodiment, the suction nozzle 65a of the cleaning apparatus 60 is comprised by the porous body which has water permeability. For this reason, the water sucked into the internal space of the suction nozzle 65a from the suction port 61a is discharged from the water-permeable portion of the suction nozzle 65a to the outside of the suction nozzle 65a.

  Thereby, it is possible to make it difficult to collect moisture inside the cleaning device main body 65.

<Modification>
In the above embodiment, the wall-mounted indoor unit 1 is cited as an indoor unit provided with the indoor heat exchanger 10 in contact with the prefilter 30. However, as shown in FIG. You may apply to the indoor unit 201 of an air conditioning apparatus.

  In FIG. 10, reference numeral 210 denotes an indoor heat exchanger, and reference numeral 230 denotes a prefilter.

  ADVANTAGE OF THE INVENTION According to this invention, the size of the indoor unit of an air conditioning apparatus can be made small.

1 is an external perspective view of an air conditioner according to an embodiment of the present invention. The refrigerant circuit figure of the air conditioning apparatus which concerns on embodiment of this invention. The longitudinal cross-sectional view (equivalent to III-III of FIG. 1) of the indoor unit of the air conditioning apparatus which concerns on embodiment of this invention. The disassembled perspective view of a pre filter and an indoor heat exchanger. The schematic perspective view of a pre filter, an indoor heat exchanger, and a cleaning apparatus. The conceptual diagram of the cleaning apparatus main body. (A) The longitudinal cross-sectional view of a suction nozzle. (B) The schematic plan view which looked at the suction nozzle from the pre-filter side. (A) The disassembled perspective view of a dust collection filter. (B) The external appearance perspective view of a dust collection filter. The longitudinal cross-sectional view of a suction nozzle and a dust removal apparatus. The longitudinal cross-sectional view of the indoor unit of the ceiling embedded type air conditioning apparatus which concerns on the modification of embodiment of this invention.

Explanation of symbols

1,201 Indoor unit 10,210 Indoor heat exchanger (heat exchanger)
13 Heat exchanger (first heat exchange part)
18 Auxiliary heat exchanger (second heat exchanger)
30,230 Pre-filter (filter)
60 Cleaning device (cleaning mechanism)
61 Equipment casing (intake / exhaust section)
61a Suction port 62 Dust collection filter (dust collection part)
63 Eliminator (moisture trap)
64 Intake / exhaust fan (fan)
65 Cleaning device body (intake and exhaust device)
70 Dust remover (Dust remover)

Claims (11)

A heat exchanger (10, 210) for exchanging heat with the passing air;
A filter (30, 230) attached in contact with at least a portion of the windward surface of the heat exchanger (10, 210) and purifying air passing therethrough;
An air conditioner indoor unit (1, 201). The filter (30, 230) has water repellency at least in contact with the heat exchanger (10, 210).
The indoor unit (1,201) of the air conditioning apparatus according to claim 1. The windward surface of the heat exchanger (10, 210) has water repellency at least in contact with the filter (30, 230).
The indoor unit (1, 201) of the air conditioning apparatus according to claim 1 or 2. The heat exchanger (10, 210) includes a hydrophilic first heat exchanging portion (13) and a second heat exchanging portion having water repellency located on the windward side of the first heat exchanging portion (13) ( 18)
The filter (30, 230) is in contact with the windward surface of the second heat exchange part (18),
The indoor unit (1, 201) of the air conditioning apparatus according to claim 3. A cleaning mechanism (60) located on the windward side of the filter (30, 230);
The indoor unit (1,201) of the air conditioning apparatus according to any one of claims 1 to 4. The cleaning mechanism (60) includes an intake / exhaust device (61) including an intake / exhaust portion (61) in which an intake port (61a) is formed, and a fan (64) disposed inside the intake / exhaust portion (61). 65)
The inlet (61a) is disposed at a contact portion where at least the heat exchanger (10, 210) and the filter (30, 230) are in contact with each other.
The indoor unit (1, 201) of the air conditioning apparatus according to claim 5. The cleaning mechanism (60) further includes a dust collecting part (62) for collecting dust sucked by the fan (64).
The indoor unit (1,201) of the air conditioning apparatus according to claim 6. The cleaning mechanism (60) further includes a dust removing unit (70) for removing the dust collected by the dust collecting unit (62) from the dust collecting unit (62).
The indoor unit (1,201) of the air conditioning apparatus according to claim 7. The cleaning mechanism (60) further includes a moisture capturing part (63) that captures moisture sucked by the fan (64).
The indoor unit (1,201) of the air conditioning apparatus according to any one of claims 5 to 8. At least a part of the intake / exhaust part (61) is made of a water permeable material,
The indoor unit (1,201) of the air conditioning apparatus according to any one of claims 6 to 9. The intake / exhaust portion (61) includes a tip nozzle (65a) in which the intake port (61a) is formed, and a fan storage portion (65c) in which an exhaust port (61b) is formed and which stores the fan (64). ) And
At least the tip nozzle (65a) is movable in the vicinity of the filter (30).
The indoor unit (1,201) of the air conditioning apparatus according to any one of claims 6 to 10.

Images