JP2023069778A - air conditioner - Google Patents

Abstract

To inhibit dust included in outdoor air from blowing out to an indoor side in an air conditioner supplying outdoor air to the indoor side via an indoor unit.SOLUTION: An indoor unit 20 of an air conditioner includes: an indoor heat exchanger 22 that exchanges heat with indoor air A1; an air filter 110 that is disposed above the indoor heat exchanger 22 and through which the indoor air A1 flowing from an indoor side toward the indoor heat exchanger 22 passes; an air supply nozzle 104 that blows out outdoor air A3; and an air supply filter 120 that is provided in the air supply nozzle 104 and through which the outdoor air A3 passes. The air supply filter 120 is provided at a position that does not overlap with the air filter 110 viewed in a forward/backward direction (X axis direction) of the indoor unit in the air supply nozzle 104 to be removable in the forward/backward direction.SELECTED DRAWING: Figure 17

Description

The present disclosure relates to air conditioners.

2. Description of the Related Art Conventionally, as described in Patent Literature 1, there is known an air conditioner configured by an indoor unit arranged inside a room to be air-conditioned and an outdoor unit arranged outdoors. This air conditioner is configured to supply humidified outdoor air from an outdoor unit to an indoor unit. Outdoor air is humidified by passing through absorbent materials that retain moisture.

JP-A-2003-314858

When the outdoor air is supplied to the indoor unit as described in Patent Document 1, it is necessary to prevent dust contained in the outdoor air from being blown into the room by the indoor unit.

Accordingly, an object of the present disclosure is to suppress blowout of dust, such as dust and dirt, contained in outdoor air into a room in an air conditioner that supplies outdoor air to a room through an indoor unit.

In order to solve the above problems, according to one aspect of the present invention,
An air conditioner having an indoor unit capable of blowing outdoor air indoors,
The indoor unit
an indoor heat exchanger that exchanges heat with indoor air;
an air filter disposed above the indoor heat exchanger and through which room air passing from the room toward the indoor heat exchanger passes;
an air supply nozzle for blowing outdoor air, and
an air supply filter provided in the air supply nozzle and through which outdoor air passes;
The air conditioner is provided, wherein the air supply filter is detachably provided in the air supply nozzle in the front-rear direction at a position that does not overlap the air filter when viewed in the front-rear direction of the indoor unit.

Advantageous Effects of Invention According to the present disclosure, in an air conditioner that supplies outdoor air to a room through an indoor unit, dust contained in the outdoor air can be suppressed from blowing into the room.

Schematic diagram of an air conditioner according to an embodiment of the present disclosure Schematic diagram of the ventilation system Schematic diagram of the ventilator during ventilation operation Schematic diagram of the ventilator during humidification operation Schematic diagram of the ventilation system during dehumidification operation Perspective view of indoor unit of air conditioner Perspective view of indoor heat exchanger and ventilation duct Front view of indoor heat exchanger and ventilation duct Side view of indoor heat exchanger and ventilation duct Lower perspective view of air supply duct Exploded perspective view of air supply duct Cross-sectional view of the air supply nozzle along line AA in FIG. Cross-sectional view of the air supply nozzle along line BB in FIG. Cross-sectional view of the air supply nozzle along the CC line in FIG. Cross-sectional view of the air supply nozzle along the DD line in FIG. FIG. 4 is a diagram showing the velocity vector distribution of the flow path inside the tip portion of the air supply nozzle of the example. FIG. 4 is a diagram showing the velocity vector distribution of the flow path inside the tip portion of the air supply nozzle of Comparative Example 1. FIG. 10 is a diagram showing the velocity vector distribution of the flow path inside the tip portion of the air supply nozzle of Comparative Example 2. Sectional view of a portion of the air conditioner showing the position of the supply air filter Perspective view of the indoor unit with the air supply filter removed

An air conditioner of one aspect of the present invention is an air conditioner having an indoor unit capable of blowing outdoor air indoors, wherein the indoor unit is an indoor heat exchanger that exchanges heat with indoor air; An air filter that is arranged above the exchanger and through which indoor air from the room toward the indoor heat exchanger passes, an air supply nozzle that blows out outdoor air, and an air supply nozzle that is provided in the air supply nozzle and through which the outdoor air passes. The air supply filter is detachably provided in the air supply nozzle in the front-rear direction at a position not overlapping the air filter when viewed in the front-rear direction of the indoor unit.

According to such an aspect, in an air conditioner that supplies outdoor air to a room via an indoor unit, dust contained in the outdoor air can be suppressed from blowing out into the room.

For example, the intake nozzle is provided in the indoor unit so that the outlet is not directed toward the air filter.

For example, the air supply nozzle extends such that the outlet is away from the air filter.

For example, the indoor unit collects dust adhering to the air filter, includes a dust box removable in the front-rear direction, and the dust box overlaps the supply air filter in the front-rear direction. installed in the indoor unit.

An embodiment of the present disclosure will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of an air conditioner according to an embodiment of the present disclosure.

As shown in FIG. 1, the air conditioner 10 according to the present embodiment has an indoor unit 20 arranged in the indoor Rin to be air-conditioned, and an outdoor unit 30 arranged in the outdoor Rout.

The indoor unit 20 includes an indoor heat exchanger 22 that exchanges heat with the indoor air A1, and invites the indoor air A1 into the indoor unit 20, and the indoor air A1 after heat exchange with the indoor heat exchanger 22 is introduced into the room. A fan 24 that blows to Rin is provided.

The outdoor unit 30 includes an outdoor heat exchanger 32 that exchanges heat with the outdoor air A2, and invites the outdoor air A2 into the outdoor unit 30. A fan 34 blowing to Rout is provided. Further, the outdoor unit 30 is provided with a compressor 36 that executes a refrigerating cycle with the indoor heat exchanger 22 and the outdoor heat exchanger 32, an expansion valve 38, and a four-way valve 40.

The indoor heat exchanger 22, the outdoor heat exchanger 32, the compressor 36, the expansion valve 38, and the four-way valve 40 are connected by refrigerant pipes through which refrigerant flows. In the case of cooling operation and dehumidification operation (weak cooling operation), the air conditioner 10 is configured such that the refrigerant flows from the compressor 36 through the four-way valve 40, the outdoor heat exchanger 32, the expansion valve 38, and the indoor heat exchanger 22 in order. Execute the freeze cycle back to 36. In the case of heating operation, the air conditioner 10 performs a refrigeration cycle in which refrigerant flows from the compressor 36 through the four-way valve 40, the indoor heat exchanger 22, the expansion valve 38, the outdoor heat exchanger 32 in order, and then returns to the compressor 36. .

The air conditioner 10 performs an air-conditioning operation of introducing the outdoor air A3 into the room Rin in addition to the air-conditioning operation by the refrigeration cycle. Therefore, the air conditioner 10 has a ventilator 50 . A ventilation device 50 is provided in the outdoor unit 30 .

FIG. 2 is a schematic diagram of a ventilator.

As shown in FIG. 2, the ventilator 50 comprises an absorbent material 52 through which outdoor air A3, A4 passes.

The absorbent 52 is a member through which air can pass, and is a member that collects moisture from the passing air or provides moisture to the passing air. In the case of this embodiment, the absorber 52 is disc-shaped and rotates around a rotation center line C1 passing through the center thereof. The absorbing material 52 is rotationally driven by a motor 54 .

Absorbent material 52 is preferably a polymeric sorbent material that sorbs moisture in the air. The polymeric sorbent material is composed of, for example, a crosslinked sodium polyacrylate. Compared to adsorbents such as silica gel and zeolite, polymer sorbents absorb a large amount of water per unit volume, can desorb water at low heating temperatures, and hold water for a long time. be able to.

Inside the ventilator 50, there are provided a first flow path P1 and a second flow path P2 through which the outdoor air A3 and A4 respectively pass through the absorbent material 52. As shown in FIG. The first flow path P1 and the second flow path P2 pass through the absorbent material 52 at different positions.

The first flow path P1 is a flow path through which the outdoor air A3 directed to the inside of the indoor unit 20 flows. The outdoor air A3 flowing through the first flow path P1 is supplied into the indoor unit 20 via the ventilation conduit 56. As shown in FIG.

In the case of this embodiment, the first flow path P1 includes a plurality of branch flow paths P1a and P1b on the upstream side with respect to the absorbent 52 . It should be noted that "upstream" and "downstream" are used herein with respect to air flow.

The plurality of tributary channels P1a and P2a join together on the upstream side of the absorbent 52 . First and second heaters 58 and 60 for heating the outdoor air A3 are provided in the plurality of branch passages P1a and P1b, respectively.

The first and second heaters 58, 60 may be heaters with the same heating capacity, or may be heaters with different heating capacities. Moreover, the first and second heaters 58 and 60 are preferably PTC (Positive Temperature Coefficient) heaters, which increase electrical resistance when current flows and the temperature rises, that is, can suppress an excessive heating temperature rise. . In the case of a heater using a nichrome wire, carbon fiber, or the like, if current continues to flow, the heating temperature (surface temperature) will continue to rise, so it is necessary to monitor the temperature. The PTC heater eliminates the need to monitor the heating temperature because the heater itself regulates the heating temperature within a certain temperature range.

A first fan 62 that generates a flow of the outdoor air A3 toward the inside of the indoor unit 20 is provided in the first flow path P1. In the case of this embodiment, the first fan 62 is arranged downstream with respect to the absorbent 52 . When the first fan 62 operates, the outdoor air A3 flows from the outdoor Rout into the first flow path P1 and passes through the absorbent 52 .

Further, the first flow path P1 is provided with a damper device 64 that distributes the outdoor air A3 flowing through the first flow path P1 to the indoor Rin (that is, the indoor unit 20) or the outdoor Rout. In this embodiment, the damper device 64 is arranged downstream of the first fan 62 . The outdoor air A3 distributed to the indoor unit 20 by the damper device 64 enters the indoor unit 20 via the ventilation conduit 56 and is blown out by the fan 24 to the indoor unit Rin.

The second flow path P2 is a flow path through which the outdoor air A4 flows. Unlike the outdoor air A3 flowing through the first flow path P1, the outdoor air A4 flowing through the second flow path P2 does not go to the indoor unit 20. The outdoor air A4 flowing through the second flow path P2 flows out to the outdoor Rout after passing through the absorbent 52 .

A second fan 66 that generates a flow of outdoor air A4 is provided in the first flow path P1. In the case of this embodiment, the second fan 66 is arranged downstream with respect to the absorbent 52 . By operating the second fan 66, the outdoor air A4 flows from the outdoor Rout into the second flow path P2, passes through the absorbent 52, and then flows out to the outdoor Rout.

The ventilator 50 selectively uses an absorbent 52 (motor 54), a first heater 58, a second heater 60, a first fan 62, a damper device 64, and a second fan 66 for ventilation operation. , humidification operation, and dehumidification operation are selectively performed.

FIG. 3 is a schematic diagram of the ventilator during ventilation operation.

The ventilation operation is an air conditioning operation in which the outdoor air A3 is directly supplied to the indoor unit Rin (that is, the indoor unit 20) through the ventilation conduit 56. As shown in FIG. 3, motor 54 continues to rotate absorbent material 52 during ventilation operation. The first heater 58 and the second heater 60 are in the OFF state and do not heat the outdoor air A3. The first fan 62 is in the ON state, thereby causing the outdoor air A3 to flow through the first flow path P1. The damper device 64 distributes the outdoor air A3 in the first flow path P1 to the indoor units 20 . The second fan 66 is in an OFF state, so that no flow of outdoor air A4 is generated in the second flow path P2.

According to such a ventilation operation, the outdoor air A3 flows into the first flow path P1 and passes through the absorbent 52 without being heated by the first and second heaters 58 and 60 . The outdoor air A3 that has passed through the absorbent 52 is distributed to the indoor units 20 by the damper device 64 . The outdoor air A3 that has passed through the damper device 64 and reached the indoor unit 20 via the ventilation conduit 56 is blown out into the room Rin by the fan 24 . Through such a ventilation operation, the outdoor air A3 is supplied to the room Rin as it is, and the room Rin is ventilated.

FIG. 4 is a schematic diagram of the ventilator during humidification operation.

The humidification operation is an air conditioning operation in which the outdoor air A3 is humidified and the humidified outdoor air A3 is supplied to the indoor unit Rin (that is, the indoor unit 20). As shown in FIG. 4, the motor 54 continues to rotate the absorbent 52 during the humidification operation. The first heater 58 and the second heater 60 are in the ON state and heat the outdoor air A3. The first fan 62 is in the ON state, thereby causing the outdoor air A3 to flow through the first flow path P1. The damper device 64 distributes the outdoor air A3 in the first flow path P1 to the indoor units 20 . The second fan 66 is in the ON state, thereby causing the outdoor air A4 to flow through the second flow path P2.

According to such a humidification operation, the outdoor air A3 flows into the first flow path P1, is heated by the first and second heaters 58 and 60, and passes through the absorbent 52. As shown in FIG. At this time, the heated outdoor air A3 can deprive the absorbent 52 of a larger amount of moisture than when it is not heated. As a result, the outdoor air A3 carries a large amount of moisture. The outdoor air A3 that has passed through the absorbent 52 and carries a large amount of moisture is distributed to the indoor unit 20 by the damper device 64 . The outdoor air A3 that has passed through the damper device 64 and reached the indoor unit 20 via the ventilation conduit 56 is blown out into the room Rin by the fan 24 . Through such a humidification operation, the outdoor air A3 carrying a large amount of moisture is supplied to the room Rin, and the room Rin is humidified.

By turning off either one of the first heater 58 and the second heater 60, the amount of moisture taken from the absorbent 52 by the outdoor air A3 is reduced. may be performed.

As the heated outdoor air A3 deprives moisture, the water retention capacity of the absorbent 52 decreases, that is, the absorbent 52 dries. When the absorbent 52 dries, the outdoor air A3 flowing through the first flow path P1 cannot deprive the absorbent 52 of moisture. As a countermeasure, the absorbent 52 deprives the outdoor air A4 flowing through the second flow path P2 of water. As a result, the amount of water retained in the absorbent material 52 is kept substantially constant, and the humidification operation can be continued.

FIG. 5 is a schematic diagram of the ventilation system during dehumidification operation.

The dehumidifying operation is an air conditioning operation in which the outdoor air A3 is dehumidified and the dehumidified outdoor air A3 is supplied to the indoor Rin (that is, the indoor unit 20). As shown in FIG. 5, in the dehumidifying operation, the adsorption operation and the regeneration operation are alternately performed.

The adsorption operation is an operation for causing the absorbent 52 to adsorb moisture carried in the outdoor air A3, thereby dehumidifying the outdoor air A3. As shown in FIG. 5, the motor 54 continues to rotate the absorbent 52 during the adsorption operation. The first heater 58 and the second heater 60 are in the OFF state and do not heat the outdoor air A3. The first fan 62 is in the ON state, thereby causing the outdoor air A3 to flow through the first flow path P1. The damper device 64 distributes the outdoor air A3 in the first flow path P1 to the indoor units 20 . The second fan 66 is in an OFF state, so that no flow of outdoor air A4 is generated in the second flow path P2.

According to such adsorption operation, the outdoor air A3 flows into the first flow path P1 and passes through the absorbent 52 without being heated by the first and second heaters 58, 60. As shown in FIG. At this time, the moisture carried in the outdoor air A3 is absorbed by the absorbent 52 . As a result, the amount of moisture carried by the outdoor air A3 is reduced, that is, the outdoor air A3 is dried. The outdoor air A3 dried by passing through the absorbent 52 is distributed to the indoor unit 20 by the damper device 64 . The outdoor air A3 that has passed through the damper device 64 and reached the indoor unit 20 via the ventilation conduit 56 is blown out into the room Rin by the fan 24 . By such adsorption operation, the dry outdoor air A3 is supplied to the room Rin, and the room Rin is dehumidified.

As the adsorption operation continues, the water retention capacity of the absorbent 52 continues to increase, and as a result, the ability of the absorbent 52 to adsorb moisture carried in the outdoor air A3 decreases. A regeneration operation is performed to regenerate the absorbent 52 in order to recover its adsorption capacity.

During regeneration operation, motor 54 continues to rotate absorbent material 52 . The first heater 58 and the second heater 60 are in the ON state and heat the outdoor air A3. The first fan 62 is in the ON state, thereby causing the outdoor air A3 to flow through the first flow path P1. The damper device 64 distributes the outdoor air A3 in the first flow path P1 not to the indoor unit 20 but to the outdoor Rout. The second fan 66 is in an OFF state, so that no flow of outdoor air A4 is generated in the second flow path P2.

According to such a regeneration operation, the outdoor air A3 flows into the first flow path P1, is heated by the first and second heaters 58 and 60, and passes through the absorbent 52. As shown in FIG. At this time, the heated outdoor air A3 deprives the absorbent 52 of a large amount of moisture. As a result, a large amount of moisture is carried in the outdoor air A3. At the same time, the water retention capacity of the absorbent 52 decreases, ie, the absorbent 52 dries and its adsorption capacity is regenerated. The outdoor air A3 that passes through the absorbent 52 and carries a large amount of moisture is distributed to the outdoor route by the damper device 64 and is discharged to the outdoor route. As a result, during the regeneration operation in the dehumidification operation, the outdoor air A3 carrying a large amount of moisture due to the regeneration of the absorbent 52 is not supplied to the indoor Rin.

By alternately performing such adsorption operation and regeneration operation, the adsorption capacity of the absorbent 52 is maintained, and the dehumidification operation can be continuously performed.

The air-conditioning operation (cooling operation, dehumidifying operation (weak cooling operation), heating operation) by the above-described refrigeration cycle and the air-conditioning operation (ventilation operation, humidification operation, dehumidification operation) by the ventilation device 50 can be performed separately, and at the same time It is also possible to execute For example, if the dehumidification operation by the refrigeration cycle and the dehumidification operation by the ventilation device 50 are simultaneously executed, it is possible to dehumidify the room Rin while maintaining the room temperature constant.

The air conditioning operation performed by the air conditioner 10 is selected by the user. For example, when a user selects the remote controller 70 shown in FIG. 1, the air conditioner 10 performs the air conditioning operation corresponding to the operation.

So far, the configuration and operation of air conditioner 10 according to the present embodiment have been schematically described. Further features of this embodiment will now be described.

FIG. 6 is a perspective view of an indoor unit of an air conditioner. Moreover, FIG. 7 is a perspective view of an indoor heat exchanger and an intake duct. Furthermore, FIG. 8 is a front view of an indoor heat exchanger and an intake duct. Furthermore, FIG. 9 is a side view of an indoor heat exchanger and an intake duct. Additionally, FIG. 10 is a bottom perspective view of the air supply duct. FIG. 11 is an exploded perspective view of the air supply duct. The XYZ orthogonal coordinate system shown in the drawings is for facilitating understanding of the embodiments, and does not limit the present disclosure. The X-axis direction indicates the front-rear direction of the indoor unit 20, the Y-axis direction indicates the left-right direction, and the Z-axis direction indicates the height direction.

As shown in FIGS. 6 to 9, the indoor unit 20 has an air supply duct 100 that blows the outdoor air A3 toward the indoor heat exchanger 22. As shown in FIGS. The supply air duct 100 is connected to the ventilation conduit 56 of the ventilation device 50 .

In the case of the present embodiment, the supply air duct 100 extends toward the front of the indoor unit 20 along the left side surface 22a of the indoor heat exchanger 22, and then along the front surface 22b of the indoor heat exchanger 22. Extend.

Specifically, in the case of the present embodiment, as shown in FIG. 11, the air supply duct 100 includes a joint duct 102 connected to the ventilation duct 56 of the ventilation device 50, and the joint duct 102 to connect to the outdoor air. and an air supply nozzle 104 for blowing out A3.

The joint duct 102 includes a connecting portion 102a connected to the ventilation conduit 56 and a connecting portion 102b connecting to the air supply nozzle 104, as shown in FIG. The joint duct 102 is arranged between the left side cover 106 of the indoor unit 20 and the left side surface 22a of the indoor heat exchanger 22 shown in FIG.

The air supply nozzle 104 includes a blowout port 104a for blowing out the outdoor air A3 and a connecting portion 104b connected to the joint duct 102 . The air supply nozzle 104 extends forward from between the left side cover 106 and the left side surface 22 a of the indoor heat exchanger 22 , bends substantially 90 degrees to the right, and extends toward the inside of the indoor heat exchanger 22 . It extends along the front surface 22b.

In this embodiment, as shown in FIG. 11, the joint duct 102 and the air supply nozzle 104 are detachable from each other in the front-rear direction (X-axis direction).

Details of the air supply nozzle 104 in the air supply duct 100 will now be described.

12 is a cross-sectional view of the air supply nozzle taken along line AA shown in FIG. 8. FIG. 13 is a cross-sectional view of the air supply nozzle along line BB shown in FIG. Furthermore, FIG. 14 is a cross-sectional view of the air supply nozzle taken along line CC shown in FIG. 15 is a cross-sectional view of the air supply nozzle taken along line DD shown in FIG.

As shown in FIGS. 12 to 15, the air supply nozzle 104 has a tip portion 104c extending along the front surface 22b of the indoor heat exchanger 22 and a left side surface 22a of the indoor heat exchanger 22. and a rear end portion 104d. The front surface 22b of the indoor heat exchanger 22 is a surface through which the indoor air A1 passes when entering the indoor heat exchanger 22. As shown in FIG.

As shown in FIG. 15, the tip portion 104c of the air supply nozzle 104 has an inlet port 104e into which the outdoor air A3 flows from the rear end portion 104d, an outlet port 104f through which the outdoor air A3 flows out, and an inlet port 104e. and a tip inner channel 104g connecting with the outlet 104f.

As shown in FIG. 12, the rear end portion 104d of the air supply nozzle 104 includes a rear end internal flow channel 104h communicating with a front end internal flow channel 104g of the front end portion 104c via an inlet 104e.

In the stu orthogonal coordinate system shown in FIG. 15, the s-axis direction (second direction) is parallel to the left-right direction (Y-axis direction) of the indoor unit 20 (that is, the indoor heat exchanger 22). The t-axis direction (first direction) is a direction orthogonal to the front surface 22b of the indoor heat exchanger 22, and the u-axis direction (third direction) is both the s-axis direction and the t-axis direction. is the direction orthogonal to In this embodiment, the su plane is parallel to the front surface 22 b of the indoor heat exchanger 22 .

Moreover, in the case of this embodiment, as shown in FIG. 14, the outflow port 104f and the blowout port 104a are parallel to each other, face each other, and communicate with each other. A channel 104i therebetween has a channel cross-sectional area that increases from the outflow port 104f toward the outlet 104a.

As shown in FIG. 15, the outflow port 104f is an elongated opening in the s-axis direction, that is, in the left-right direction (Y-axis direction) of the indoor heat exchanger 22 . In this embodiment, the outlet 104f is substantially rectangular. The outflow port 104f is oriented in a direction including at least the t-axis direction, that is, in a direction inclined forward of the indoor unit 20 by about 27 degrees from a direction orthogonal to the front surface 22b of the indoor heat exchanger 22.

In addition, as shown in FIG. 10, the outlet 104a is also a substantially rectangular opening elongated in the left-right direction (Y-axis direction) of the indoor heat exchanger 22 so as to correspond to the outlet 104f. In the case of this embodiment, the sizes in the horizontal direction of the outflow port 104f and the outlet 104a are substantially the same. Moreover, in the case of the present embodiment, the outlet 104a also faces the same direction as the outlet 104f.

The outlet 104a elongated in the left-right direction (Y-axis direction) of the indoor heat exchanger 22 allows the outdoor air A3 to spread widely in the room Rin (the outlet 104a extends in the left-right direction of the indoor heat exchanger 22). (compared to the case where the aperture is elongated in the direction perpendicular to the ). Specifically, the outdoor air A3 blown out from the outlet 104a of the air supply nozzle 104 is attracted by the fan 24, passes through the indoor heat exchanger 22, and is blown out by the fan 24 toward the indoor Rin. Therefore, since the outlet 104a is a laterally elongated opening, the outdoor air A3 can be supplied from the indoor unit 20 to the room Rin over a wide range in the lateral direction.

In addition, since the outlet 104a is oriented in a direction inclined forward of the indoor unit 20 by about 27 degrees from the direction orthogonal to the front surface 22b of the indoor heat exchanger 22, the outdoor air A3 is discharged from the air supply nozzle 104 to the outside. easy to flow out. In contrast, when the outlet 104a faces in a direction perpendicular to the front surface 22b of the indoor heat exchanger 22, part of the outdoor air A3 blown out from the outlet 104a is substantially turned 90 degrees. As a result, the flow velocity of the outdoor air A3 in the air supply nozzle 104 near the blowout port 104a decreases. In this case, it is conceivable to increase the distance between the front surface 22b of the indoor heat exchanger 22 and the outlet 104a. Therefore, as in the present embodiment, the outlet 104a blows out the outdoor air A3 in a non-perpendicular direction to the front surface 22b of the indoor heat exchanger 22, whereby the outdoor air A3 flows out from the air supply nozzle 104. easier.

As shown in FIG. 15, unlike the outlet 104f, the inlet 104e is an opening elongated in the u-axis direction, that is, in a direction orthogonal to the left-right direction (Y-axis direction) of the indoor heat exchanger 22. As shown in FIG. Further, in the case of this embodiment, the inlet 104e is substantially rectangular.

The reason why the inlet 104e is an elongated opening in the u-axis direction, that is, in a direction perpendicular to the left-right direction (Y-axis direction) of the indoor heat exchanger 22 is that the left side cover 106 of the indoor unit 20 and the left side of the indoor heat exchanger 22 This is because the gap in the left-right direction with respect to the surface 22a is narrow. Therefore, the lateral size of the rear end portion 104d of the air supply nozzle 104 is reduced, and as a result, the inlet 104e becomes an elongated opening in a direction perpendicular to the lateral direction (Y-axis direction) of the indoor heat exchanger 22. It's becoming

As shown in FIG. 15, since the inflow port 104e and the outflow port 104f are elongated openings in directions different from each other by substantially 90 degrees, the tip portion inner flow path 104g connecting them extends in the lateral direction of the indoor heat exchanger 22 ( X-axis direction) from the inlet 104e. That is, as shown in FIG. 8, the tip portion 104c of the air supply nozzle 104 extends from the upper left toward the lower right when viewed from the front (viewed in the X-axis direction).

In the case of the present embodiment, as shown in FIG. 15, the tip inner flow path 104g is linear. Specifically, the tip portion inner flow path 104g is viewed in the t-axis direction, that is, in a direction orthogonal to the front surface 22b of the indoor heat exchanger 22, and is substantially viewed in the opening direction of the inlet 104e and the outlet 104f. and is defined by a straight inner wall portion 104j extending between one longitudinal end of the inlet 104e furthest from each other and one longitudinal end of the outlet 104f. As a result, the pressure loss of the outdoor air A3 in the tip portion inner flow path 104g is suppressed. This pressure loss will be described with reference to simulation results.

FIG. 16A is a diagram showing the velocity vector distribution of the flow path inside the tip portion of the air supply nozzle of the example. 16B is a diagram showing the velocity vector distribution of the flow path inside the tip portion of the air supply nozzle of Comparative Example 1. FIG. FIG. 16C is a diagram showing the velocity vector distribution of the flow path inside the tip portion of the air supply nozzle of Comparative Example 2. As shown in FIG. In FIGS. 16A-16C, the darker the area, the greater the velocity belt. Note that the velocity vector distributions shown in FIGS. 16A to 16C show the results of simulation under the condition that air passes through the inlet at a flow rate of 0.75 m ³ /min.

In the embodiment shown in Figure 16A, the inner wall extending between the longitudinal end of the inlet furthest from each other and the longitudinal end of the outlet is straight. In this case, the distribution of velocity vectors is generally uniform in the channel between the inlet and the outlet. In this case, a pressure loss of 124.7 Pa occurs between the inlet and the outlet.

In Comparative Example 1 shown in FIG. 16B, the inner wall extending between the longitudinal end of the inlet and the longitudinal end of the outlet furthest from each other is non-linear. Specifically, a portion of the inner wall near the outlet is greatly curved inward. In this case, the flow velocity increases at this curved portion, and a separation flow occurs. In this case, a pressure loss of 165.3 Pa occurs between the inlet and the outlet.

In Comparative Example 2, shown in FIG. 16C, the inner wall extending between the longitudinal end of the inlet and the longitudinal end of the outlet furthest from each other is non-linear. Specifically, a portion of the inner wall near the outlet is slightly curved inward, and the upstream portion is largely curved outward. In this case, the flow velocity increases between the outwardly curving portion and the inwardly curving portion, and a separation flow occurs in the inwardly curving portion. In this case, a pressure loss of 126.6 Pa occurs between the inlet and the outlet.

From the simulation results shown in FIGS. 16A to 16C, a straight line extending through the tip end inner channel 104g of the air supply nozzle 104 between one longitudinal end of the inlet 104e farthest from each other and one longitudinal end of the outlet 104f It can be seen that the pressure loss of the outdoor air A3 can be suppressed by demarcating with the shaped inner wall portion 104j.

In the case of the present embodiment, as shown in FIG. 15, the tip inner flow path 104g has a substantially trapezoidal shape when viewed in the t-axis direction, that is, when viewed in a direction orthogonal to the front surface 22b of the indoor heat exchanger 22. That is, the channel cross-sectional area is substantially constant. Therefore, pressure loss is suppressed more than when the cross-sectional area of the flow path changes locally. In place of the trapezoidal shape, the tip inner flow path 104g may be substantially triangular.

The outdoor air A3 is supplied farther from the indoor unit 20 by suppressing the pressure loss in the tip inner flow path 104g near the outlet 104a in this way. Also, the generation of noise is suppressed.

As shown in FIG. 8, the tip portion 104c of the air supply nozzle 104 extends from the upper left to the lower right when viewed from the front (viewed in the X-axis direction). I will explain why.

FIG. 17 is a cross-sectional view of a portion of the air conditioner showing the position of the supply air filter. FIG. 18 is a perspective view of the indoor unit with the air supply filter removed.

As shown in FIG. 17, the tip portion 104c of the air supply nozzle 104 extends from the upper left to the lower right when viewed from the front (viewed in the X-axis direction). away from the air filter 110;

Specifically, as shown in FIG. 17, the air supply nozzle 104 is arranged below the air filter 110 . Further, as shown in FIG. 8, the tip portion 104c of the air supply nozzle 104 extends from the upper left to the lower right when viewed from the front (viewed in the X-axis direction). As a result, the outlet 104 a of the air supply nozzle 104 is separated from the air filter 110 .

Furthermore, in the case of the present embodiment, the air supply nozzle 104 is provided in the indoor unit 20 so that the outlet 104 a thereof does not face the air filter 110 .

The air filter 110 is arranged above the indoor heat exchanger 22, and the indoor air A1 flowing into the indoor unit 20 through the intake port 20a formed on the upper surface of the housing of the indoor unit 20 passes through. As a result, air filter 110 collects dust such as dust and dirt contained in indoor air A1.

When the outdoor air A3 blown out from the air supply nozzle 104, especially the humidified outdoor air A3, hits the air filter 110 that collects the dust, the dust on the air filter 110 gets wet and sticks to the air filter 110. there is a possibility. Depending on the circumstances, the air filter 110 may become clogged due to adhering dust. As a countermeasure, the air supply nozzle 104 is arranged below the air filter 110 and its outlet 104 a is separated from the air filter 110 . Furthermore, in the case of the present embodiment, the air supply nozzle 104 is arranged in the indoor unit 20 so that the outlet 104 a does not face the air filter 110 .

Note that, in the case of the present embodiment, the dust collected by the air filter 110 is periodically and automatically removed from the air filter 110 . Specifically, the air filter 110 is flexible and is transported by the transport shaft 112 along a predetermined path from a normal position above the indoor heat exchanger 22 (position during air conditioning operation). As a result, the air filter 110 is folded back on the conveying shaft 112 while being conveyed by the conveying shaft 112 . At this time, the air filter 110 passes between the conveying shaft 112 and the brush 114 . As a result, dust on air filter 110 is swept away by brush 114 . The swept dust falls and is collected in a dust box 116 arranged below the brush 114 . As shown in FIG. 18, the dust box 116 is provided in the indoor unit 20 so as to be detachable in the front-rear direction (X-axis direction) of the indoor unit 20 . When removing the dust box 116 from the indoor unit 20, the front cover 118 of the indoor unit 20 shown in FIG. ).

Further, as shown in FIG. 14, the air supply nozzle 104 includes an air supply filter 120 through which the outdoor air A3 passes and collects dust such as dust and dirt contained in the outdoor air A3. In the case of this embodiment, the air supply filter 120 is detachably provided on the air supply nozzle 104 between the outflow port 104f and the blowout port 104a.

17, the air supply filter 120 is positioned so as not to overlap the air filter 110 when viewed in the front-rear direction (X-axis direction) of the indoor unit 20. As shown in FIG. provided in the air nozzle 104 . As a result, air supply filter 120 can be removed without removing air filter 110 located above air supply nozzle 104 .

In the case of the present embodiment, as shown in FIG. 17, air supply filter 120 of air supply nozzle 104 is positioned behind dust box 116 . That is, the air supply filter 120 and the dust box 116 overlap in the front-rear direction (X-axis direction) of the indoor unit 20 . The dust box 116 functions as a lid that blocks movement of the outdoor air A3 leaking from the gap between the air supply nozzle 104 and the air supply filter 120 forward of the indoor unit 20 . As a result, most of the outdoor air A3 passes through the indoor heat exchanger 22 and is blown out over the entire room Rin by the fan 24 .

Since the dust box 116 is located in front of the air supply filter 120, the air supply filter 120 can be removed after the dust box 116 is removed. As a result, dust accumulated in dust box 116 and dust accumulated on air supply filter 120 can be removed at the same time. For example, the user can be notified of removal of dust in dust box 116 and removal of dust on air supply filter 120 at the same time. That is, the sensor for detecting dust on the air supply filter 120 can be omitted, and only a sensor for detecting the amount of dust in the dust box 116 is provided.

With such an air supply filter 120, it is possible to suppress blowout of dust such as dust and dirt contained in the outdoor air A3 into the room.

According to the present embodiment as described above, in the air conditioner 10 that supplies the outdoor air A3 to the indoor Rin through the indoor unit 20, dust such as dust contained in the outdoor air A3 is transferred to the indoor Rin. Blowout can be suppressed.

Although the present invention has been described with reference to the above-described embodiments, the present disclosure is not limited to the above-described embodiments.

For example, in the embodiment described above, dust on air filter 110 is automatically removed. However, embodiments of the present disclosure are not limited to this. The air filter may be detachably installed in the indoor unit and cleaned by the user.

That is, in a broad sense, the air conditioner according to the embodiment of the present disclosure is an air conditioner having an indoor unit capable of blowing outdoor air indoors, wherein the indoor unit exchanges heat with the indoor air. an indoor heat exchanger, an air filter disposed above the indoor heat exchanger and through which indoor air from the room passes toward the indoor heat exchanger, an air supply nozzle for blowing outdoor air, and an air filter provided in the air supply nozzle and an air supply filter through which outdoor air passes, wherein the air supply filter is detachably provided in the air supply nozzle in the front-rear direction at a position that does not overlap the air filter when viewed in the front-rear direction of the indoor unit. It is an air conditioner.

The present disclosure is applicable to any air conditioner having an indoor unit capable of blowing outdoor air indoors.

20 indoor unit 22 indoor heat exchanger 104 air supply nozzle 110 air filter 120 air supply filter A1 indoor air A3 outdoor air

Claims (4)

An air conditioner having an indoor unit capable of blowing outdoor air indoors,
The indoor unit
an indoor heat exchanger that exchanges heat with indoor air;
an air filter disposed above the indoor heat exchanger and through which room air passing from the room toward the indoor heat exchanger passes;
an air supply nozzle for blowing outdoor air, and
an air supply filter provided in the air supply nozzle and through which outdoor air passes;
The air conditioner according to claim 1, wherein the air supply filter is detachably provided in the air supply nozzle in the front-rear direction at a position that does not overlap the air filter when viewed in the front-rear direction of the indoor unit.
2. The air conditioner according to claim 1, wherein said intake nozzle is provided in said indoor unit such that said outlet is not directed toward said air filter.
3. The air conditioner according to claim 1, wherein said air supply nozzle extends such that said outlet is away from said air filter.
The indoor unit includes a dust box that collects dust adhering to the air filter and is removable in the front-rear direction,
The air conditioner according to any one of claims 1 to 3, wherein the dust box is provided in the indoor unit so as to overlap the air supply filter in the front-rear direction.

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