JP5589538B2 - Indoor unit of air conditioner - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner, and more particularly to an indoor unit that blows conditioned air from a blowout port to a space to be conditioned.

  In a ceiling-embedded indoor unit, a flap is usually provided at the air outlet, and the air direction of the conditioned air blown out from the air outlet can be freely changed. For example, in an indoor unit of an air conditioner disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 7-324802), the flap is inclined so that air-conditioned air is blown slightly downward during heating operation, and air-conditioning is performed during cooling operation. The posture is substantially parallel to the ceiling surface so that air is blown horizontally.

  However, the portion located in the direction in which the conditioned air is blown out in the vicinity of the outlet is cooled by the conditioned air during the cooling operation or the dehumidifying operation, so that moisture floating in the surrounding area condenses on the portion. To do. Therefore, the condensed water may be scattered by the wind pressure of the conditioned air.

  An object of the present invention is to provide an indoor unit of an air conditioner in which condensed water is not scattered by conditioned air even in a high humidity atmosphere.

An indoor unit of an air conditioner according to a first aspect of the present invention is an indoor unit of an air conditioner that blows conditioned air from an outlet to an air conditioned space, and includes a water retaining groove, a flap, a humidity detector, and a control. A part. The water retention groove is provided in the vicinity of the air outlet, and retains water condensed in the vicinity of the air outlet. The flap changes the direction of the conditioned air blown out from the outlet. The humidity detector detects the humidity of the air-conditioning target space. The control unit controls the flap operation based on a preset flap operation mode. The flap operation modes include a swing operation mode, an automatic wind direction change mode, and a non-automatic wind direction change mode. In the swing operation mode, the operation direction of the flap is reversed every predetermined period. The automatic wind direction change mode automatically changes the wind direction of the conditioned air. The non-automatic wind direction change mode changes the wind direction of the conditioned air according to the operation input to the remote operation device when the control unit has the remote operation device. When the humidity of the air-conditioning target space is equal to or higher than a predetermined value in at least the swing operation mode among the three operation modes of the flap, the control unit determines that the minimum opening with respect to the air outlet of the flap is the predetermined value. Wind direction restriction control is performed so that the opening is greater than the minimum opening with respect to the air outlet of the flap. In addition, during the wind direction restriction control, the control unit is configured such that the minimum distance to the flap water retention groove when the humidity of the air-conditioning target space is equal to or greater than a predetermined value is the flap water retention groove when the humidity of the air-conditioning target space is less than the predetermined value To be larger than the minimum distance to. Further, when the humidity of the air-conditioning target space becomes equal to or higher than a predetermined value and lower than the predetermined value, the control unit cancels the wind direction restriction control after a predetermined time has elapsed since that time.

In this indoor unit, when the humidity of the air-conditioning target space becomes equal to or higher than a predetermined value, a part of the moisture in the air-conditioning target space is condensed near the air outlet and is held in the water retention groove. Since the water retention groove and the air outlet are close to each other, there is a possibility that the water in the water retention groove is blown away by the conditioned air. In particular, when the water in the water retaining groove is in a liquid state, the possibility is further increased. However, in the present invention, the flap operates so that the minimum distance to the water retention groove of the flap is larger than the minimum distance to the water retention groove of the flap when the humidity of the air-conditioning target space is less than a predetermined value. The air pressure of the conditioned air that hits the water retention groove is weakened by the distance away from the water retention groove, thereby preventing the water in the water retention groove from being scattered.

  In particular, in the swing operation mode, since the flaps approach the water retention groove at a constant cycle, there is a high possibility that the water in the water retention groove will be blown away by the conditioned air. Therefore, if the flap is prevented from approaching within a certain distance from the water retention groove by the wind direction restriction control, the scattering of water from the water retention groove is prevented even in the swing operation mode of the flap. In addition, the swinging action of the flap has the effect of pulsing the air-conditioned air to collect the water held in the water retaining groove in one place, which is likely to promote the scattering of water. However, if the flap does not approach within a certain distance from the water retention groove by the wind direction restriction control, the water in the water retention groove is difficult to gather.

The indoor unit of the air conditioner according to the second aspect of the present invention is the indoor unit of the air conditioner according to the first aspect, wherein the water retaining groove is a blowing direction when the conditioned air is blown horizontally from the blower outlet. Located on the side.

In this indoor unit, condensation near the air outlet is caused by condensation of water floating in the air-conditioning target space in the vicinity of the air outlet, which is cooled by the conditioned air. The portion located on the blowing direction side when being blown out is most likely to condense. Therefore, since the water retaining groove is located on the blowing direction side when the conditioned air is blown horizontally from the blowout port, the dew condensation water is reliably held, and thus the water is prevented from being scattered by the conditioned air.

The indoor unit of the air conditioner according to the third aspect of the present invention is the indoor unit of the air conditioner according to the second aspect , and the control unit moves the flap posture by changing the angle of the flap with respect to the horizontal direction. It is possible to switch to a plurality of stages within the range. Moreover, a control part restrict | limits the upper limit of the movable range of a flap at the time of wind direction restriction | limiting control.

In this indoor unit, the water retaining groove is located on the blowing direction side when the conditioned air is blown horizontally from the outlet, so the water held in the water retaining groove is most likely to be scattered because the flap is the conditioned air. This is when the blowing direction is the most horizontal. Therefore, by restricting the upper limit of the movable range of the flap at the time of the wind direction restriction control, the flap does not take a posture in which the blowing direction of the conditioned air is closest to the horizontal, so that the scattering of water from the water retaining groove is prevented.

In the indoor unit of the air conditioner according to the first aspect of the present invention, the minimum distance of the flap to the water retention groove is larger than the minimum distance of the flap to the water retention groove when the humidity of the air-conditioning target space is less than a predetermined value. In addition, since the flap is operated, the wind pressure of the air-conditioning air hitting the water retention groove is weakened by an amount that the flap has moved away from the water retention groove, and the scattering of water in the water retention groove is prevented.

  Further, if the flap is prevented from approaching within a certain distance from the water retention groove by the wind direction restriction control, the scattering of water from the water retention groove is prevented even in the swing operation mode of the flap.

In the indoor unit of the air conditioner according to the second aspect of the present invention, the water retention groove reliably holds the condensed water by being positioned on the blowing direction side when the conditioned air is blown horizontally from the blowing outlet. The scattering of water by conditioned air is prevented beforehand.

In the indoor unit of the air conditioner according to the third aspect of the present invention, during the wind direction restriction control, the upper limit of the movable range of the flap is restricted, thereby preventing water from scattering from the water retention groove .

The block diagram of the air conditioning apparatus by which the indoor unit which concerns on one Embodiment of this invention is employ | adopted. The perspective view of an indoor unit. The fragmentary sectional view of an indoor unit when the flap has closed the blower outlet. The fragmentary sectional view of an indoor unit when a flap will be in the attitude | position which makes the blowing direction of air-conditioning air the most horizontal. FIG. 4 is a partial cross-sectional view of the indoor unit when the flap is in a posture that is inclined downward by 1 to 3 steps from the posture illustrated in FIG. 3B. The fragmentary sectional view of an indoor unit when a flap will be in the attitude | position which makes the blowing direction of air-conditioning air the downward direction most. Flow of wind direction restriction control.

  Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration of Air Conditioner FIG. 1 is a configuration diagram of an air conditioner in which an indoor unit according to an embodiment of the present invention is used. The air conditioner 1 includes an outdoor unit 2, an indoor unit 4, a liquid refrigerant communication tube 5, and a gas refrigerant communication tube 6. The outdoor unit 2 and the indoor unit 4 are connected by a liquid refrigerant communication pipe 5 and a gas refrigerant communication pipe 6 to constitute a vapor compression refrigerant circuit 10. The indoor unit 4 is a ceiling-embedded indoor unit.

(2) Outdoor unit 2
The outdoor unit 2 is mainly installed outdoors, and includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an expansion valve 24, a liquid side closing valve 25, and a gas side closing valve 26. The compressor 21 sucks in a low-pressure gas refrigerant, compresses it into a high-pressure gas refrigerant, and discharges it.

  The four-way switching valve 22 is a valve that switches the direction of the refrigerant flow when switching between the cooling operation and the heating operation. During the cooling operation, the four-way switching valve 22 connects the discharge side of the compressor 21 and the gas side of the outdoor heat exchanger 23 and connects the gas side closing valve 26 and the suction side of the compressor 21 (FIG. 1). (See the solid line of the four-way selector valve 22 in FIG. 2).

  Further, the four-way switching valve 22 connects the discharge side of the compressor 21 and the gas side shut-off valve 26 and connects the gas side of the outdoor heat exchanger 23 and the suction side of the compressor 21 during heating operation ( (Refer to the broken line of the four-way switching valve 22 in FIG. 1).

  The outdoor heat exchanger 23 is a heat exchanger that functions as a refrigerant radiator during cooling operation and functions as a refrigerant evaporator during heating operation. The outdoor heat exchanger 23 has a liquid side connected to the expansion valve 24 and a gas side connected to the four-way switching valve 22.

  The expansion valve 24 decompresses the high-pressure liquid refrigerant radiated in the outdoor heat exchanger 23 during the cooling operation before sending it to the evaporator, and sends the high-pressure liquid refrigerant radiated in the condenser to the outdoor heat exchanger 23 during the heating operation. Depressurize before.

  The liquid side shutoff valve 25 and the gas side shutoff valve 26 are valves provided at connection ports with the liquid refrigerant communication pipe 5 and the gas refrigerant communication pipe 6. The liquid side closing valve 25 is connected to the expansion valve 24. The gas side closing valve 26 is connected to the four-way switching valve 22.

  The outdoor unit 2 is provided with an outdoor control unit 39. The outdoor control unit 39 includes a microcomputer and a memory, and controls the operation of each device constituting the outdoor unit 2. Furthermore, since the outdoor control unit 39 controls the outdoor unit 2, it can communicate control signals with the indoor unit 4 side.

(3) Configuration of Indoor Unit 4 The indoor unit 4 has an indoor heat exchanger 42. The indoor heat exchanger 42 is a fin-and-tube heat exchanger that cools air by functioning as a refrigerant evaporator during cooling operation, and functions as a refrigerant radiator during heating operation. Heat. The indoor heat exchanger 42 is connected to the liquid refrigerant communication tube 5 and the gas refrigerant communication tube 6.

  FIG. 2 is a perspective view of the indoor unit. In FIG. 2, the indoor unit 4 includes a casing 51 and a bottom panel 52. The casing 51 is a substantially octagonal box-like body in which the long side and the short side are alternately formed in a plan view, and the indoor heat exchanger 42 and an indoor fan (not shown) capable of controlling the air volume are included therein. Is inserted into an opening formed in the ceiling of the air-conditioning target space.

(3-1) Detailed structure of the bottom panel 52 The bottom panel 52 is a plate-like body having a substantially quadrangular shape in plan view, and is fitted into an opening in the ceiling in which the casing 51 is inserted. The lower panel 52 has a suction port 55 for sucking air at approximately the center, and four blowout ports 56 formed so as to surround the periphery of the suction port 55.

(3-1-1) Suction port 55
The suction port 55 is a substantially quadrangular opening. The suction port 55 is provided with a suction grill 57 and a filter (not shown) for removing dust in the air sucked from the suction port 55. A humidity sensor 64 is disposed at the suction port 55 (between the suction grille 57 and the filter) and detects the humidity of the air-conditioning target space.

(3-1-2) Air outlet 56
The air outlet 56 is formed along each side of the quadrangle of the lower surface panel 52. Each of the four outlets 56 is provided with a flap 71.

(3-1-3) Flap 71
The flap 71 is a plate-like member that is elongated along the longitudinal direction of the air outlet 56, and both ends in the longitudinal direction are supported by the lower panel 52 so as to be rotatable around the longitudinal axis. ing. Moreover, the flap 71 can change the blowing direction of the conditioned air by changing the posture.

(3-1-4) Water retention groove 53
In addition, an annular water retaining groove 53 is formed on the lower panel 52 so as to surround the four outlets 56. In FIG. 2, the shape of the water retaining groove 53 is difficult to understand. FIG. 3A is a partial cross-sectional view of the indoor unit when the flap closes the outlet.

  In FIG. 3A, a plurality of water retaining grooves 53 are formed at positions adjacent to the edge on the blowing direction side when the conditioned air is blown horizontally among the edges of the outlet 56. During the cooling operation or the dehumidifying operation, the area around the air outlet 56 is cooled by the conditioned air, so that moisture floating in the air-conditioning target space is condensed and condensed. In particular, when the conditioned air is blown horizontally, the edge portion on the blowing direction side of the blowout port 56 is most likely to condense. Therefore, the water retaining groove 53 is formed in the vicinity thereof, so that the condensed water is reliably held by the water retaining groove 53.

(3-2) Indoor control unit 69
The indoor unit 4 is further provided with an indoor control unit 69 (see FIG. 1). The indoor control unit 69 includes a microcomputer and a memory, and further, various sensors such as a remote controller 99 and a humidity sensor 64 (see FIG. 2) are connected to control the operation of each device constituting the indoor unit 4. Control. Further, the indoor control unit 69 can communicate control signals with the outdoor control unit 39 of the outdoor unit 2 in order to control the indoor unit 4.

  Furthermore, the indoor control unit 69 can change the posture of the flap 71 in accordance with the load state of the air-conditioning target space or in response to a request from the remote controller 99.

(4) Operation control of the flap 71 (4-1) Posture of the flap 71 FIG. 3B is a partial cross-sectional view of the indoor unit when the flap is in a posture that makes the blowing direction of the conditioned air most horizontal. FIG. 3C is a partial cross-sectional view of the indoor unit when the flap is in a posture inclined downward by 1 to 3 steps from the posture shown in FIG. 3B. Furthermore, FIG. 3D is a partial cross-sectional view of the indoor unit when the flap is in a posture in which the blowing direction of the conditioned air is most downward.

  In FIG. 3B, the posture when the flap 71 is stopped by rotating by a first predetermined angle in the direction of opening the air outlet 56 around the rotation shaft 71a from the position where the air outlet 56 is closed is referred to as “posture P0. " Although the posture P0 of the flap 71 is not a horizontal posture, since the flap 71 is a curved plate-like member, the conditioned air flows along the curved surface of the flap 71 and is deflected in a substantially horizontal direction when leaving the flap 71.

  In FIG. 3C, the posture when the flap 71 is further rotated by a second predetermined angle in the direction to open the air outlet 56 from the position where the flap 71 is in the posture P0 and is stopped is referred to as “posture P1”. When the flap 71 is in the posture P1, the direction in which the conditioned air is blown out is not the horizontal direction. The posture when the flap 71 is further rotated by a third predetermined angle in the direction to open the air outlet 56 from the position where the flap 71 is in the posture P1 and is stopped is referred to as “posture P2”, and from the position where the flap 71 is in the posture P2. Further, the posture when the air outlet 56 is rotated by a fourth predetermined angle in the opening direction and stopped is referred to as “posture P3”, and both are indicated by a two-dot chain line in FIG. 3C.

  In FIG. 3D, the posture when the flap 71 is further rotated by a fifth predetermined angle in the direction to open the air outlet 56 from the position where the flap 71 is in the posture P3 and is stopped is referred to as “posture P4”. When the flap 71 is in the posture P4, the air outlet 56 is fully open, and the direction of blowing the conditioned air is most downward. As described above, the flap 71 can be changed in a plurality of stages from “posture P0” shown in FIG. 3B to “posture P4” shown in FIG. 3D.

(4-2) Flap Operation Mode The indoor control unit 69 can execute a plurality of operation modes by using the posture control of the flap 71. A program for executing each operation mode is stored in the memory of the indoor control unit 69 in advance. The plural types of operation modes include a swing operation mode, an automatic wind direction change mode, and a non-automatic wind direction change mode.

  The swing operation mode is a mode in which the flap 71 is repeatedly rotated up and down to alternately repeat the posture P0 and the posture P4, and the operation direction of the flap 71 is reversed at a predetermined cycle.

  The automatic wind direction change mode is a mode in which the air direction of the conditioned air is changed by switching to any one of the postures P0 to P4 according to the air conditioning load state of the air conditioning target space.

  The non-automatic wind direction change mode is a mode in which the air direction of the conditioned air is changed by switching to any one of postures P0 to P4 in accordance with an operation input to the remote controller 99.

(4-3) Airflow direction restriction control of the flap 71 As shown in FIGS. 3B to 3D, the water retention groove 53 and the air outlet 56 are close to each other. Therefore, when the conditioned air is blown out in the horizontal direction, the water retention groove 53. There is a possibility that the water held in the air will be blown away by the conditioned air. In particular, in a high-humidity atmosphere where the humidity of the air-conditioning target space is 70% or more, there is a high possibility that the water in the water retaining groove 53 is in a liquid state, and thus the possibility of water scattering further increases.

  Therefore, in this indoor unit 4, when the humidity of the air-conditioning target space becomes equal to or higher than a predetermined value, the minimum opening degree of the flap 71 with respect to the air outlet 56 is The flap 71 operates so as to be larger than the minimum opening degree with respect to the air outlet 56.

  In other words, when the humidity detected by the humidity sensor 64 is equal to or greater than a predetermined value, the minimum distance of the flap 71 to the water retention groove 53 is greater than the minimum distance of the flap 71 to the water retention groove 53 when the humidity is less than the predetermined value. “Wind direction restriction control” is performed to restrict the wind direction so as to increase. The predetermined value is set to a numerical value selected from a range of 70% or more.

  In addition, the definition of the minimum opening degree with respect to the blower outlet 56 of the flap 71 is not limited to the minimum distance with respect to the water retaining groove 53 of the flap 71. For example, in the type without the water retaining groove 53, the minimum opening degree of the flap 71 with respect to the air outlet 56 can be defined as the minimum distance with respect to the edge of the air outlet 56 on the side where the conditioned air is blown out. Furthermore, the minimum opening degree of the flap 71 with respect to the air outlet 56 can be defined as the minimum rotation angle when the flap 71 rotates to open the air outlet 56.

  For example, when the flap 71 is operating in the swing operation mode, when the humidity is less than a predetermined value, the indoor control unit 69 controls the flap 71 to alternately repeat the posture P0 and the posture P4. However, when the humidity is equal to or higher than the predetermined value, the indoor control unit 69 performs control so that the flap 71 alternately repeats the posture P1 and the posture P4. Hereinafter, the wind direction restriction control will be described with reference to FIG.

  FIG. 4 is a flow of the wind direction restriction control. In step S1, the indoor control unit 69 determines whether or not the operation mode of the flap 71 is the swing operation mode. The indoor control unit 69 proceeds to step S2 when the operation mode of the flap 71 is determined to be the swing operation mode, and continues to monitor the operation mode of the flap 71 when it is determined that the operation mode is not the swing operation mode.

  In step S2, the indoor control unit 69 determines whether or not the operation mode of the air conditioner 1 is either a cooling operation or a dehumidifying operation. When the indoor control unit 69 determines that the operation mode is either the cooling operation or the dehumidifying operation, the indoor control unit 69 proceeds to step S3. When the indoor control unit 69 determines that the operation mode is neither the cooling operation nor the dehumidifying operation, the indoor control unit 69 continues to operate. Monitor.

  In step S3, the indoor control unit 69 determines whether or not the air conditioner is in a thermo-on state. The indoor control unit 69 proceeds to step S4 when it is determined that it is in the thermo-on state, and when it is determined that it is not in the thermo-on state, it continuously monitors whether or not it is in the thermo-on state.

  In step S4, the indoor control unit 69 determines whether or not the humidity sensor 64 is normal. When the indoor control unit 69 determines that the humidity sensor 64 is normal, the indoor control unit 69 proceeds to step S5. Is released.

  In step S5, the indoor control unit 69 determines whether the humidity is equal to or higher than a predetermined value. When the indoor control unit 69 determines that the humidity is equal to or higher than the predetermined value, the indoor control unit 69 proceeds to step S6 and sets the swing range of the flap 71 to the postures P1 to P4. When the indoor control unit 69 determines that the humidity is less than the predetermined value, the indoor control unit 69 proceeds to step S7 and sets the swing range of the flap 71 to the postures P0 to P4.

  As described above, when the humidity is equal to or higher than the predetermined value, the flap 71 does not become the posture P0 by the wind direction restriction control. Since the posture P0 of the flap 71 is the posture that is closest to the water retaining groove 53 and that is closest to the horizontal direction of the conditioned air except for the state in which the air outlet 56 is closed, the flap 71 By not becoming P0, the water retaining groove 53 is prevented from approaching within a certain distance. As a result, the conditioned air does not hit the water retaining groove 53, and water scattering from the water retaining groove 53 is prevented.

  Further, the swing operation of the flap 71 has an action of pulsating the air-conditioned air to collect the water retained in the water retaining groove 53 at one place, which is highly likely to promote the scattering of water. However, since the flap 71 does not come within a certain distance from the water retention groove 53 by the wind direction restriction control, the water in the water retention groove 53 is difficult to gather.

(Feature)
(1)
In the indoor unit 4, the indoor control unit 69 executes the wind direction restriction control when the humidity detected by the humidity sensor 64 is equal to or higher than a predetermined value. The wind direction restriction control is a control to operate so that the minimum distance of the flap 71 to the water retention groove 53 is larger than the minimum distance of the flap 71 to the water retention groove 53 when the humidity is less than a predetermined value.

  Specifically, the indoor control unit 69 restricts the upper limit of the movable range of the flap 71 when the humidity is equal to or higher than a predetermined value, so that the conditioned air of the five postures P0 to P4 of the flap 71 is reduced. Do not switch to the “posture P0” that makes the blowing direction the most horizontal. Since the water retained in the water retaining groove 53 is most likely to be scattered when the “posture P0” is reached, the air direction restriction control prevents the water from scattering from the water retaining groove 53.

(2)
The indoor control unit 69 performs wind direction restriction control in the swing operation mode. The swing operation of the flap 71 has an action of pulsating the air-conditioned air to collect water held in the water retaining groove 53 in one place, and it is highly likely that it will promote the scattering of water. However, since the flap 71 is prevented from approaching within a certain distance from the water retaining groove by the wind direction restriction control, the water in the water retaining groove 53 is difficult to gather.

(3)
Since the water retaining groove 53 is located on the blowing direction side when the conditioned air is blown horizontally from the blower outlet 56, the water retaining groove 53 reliably holds the condensed water. As a result, scattering of water by conditioned air is prevented in advance.

(Modification 1)
In the above embodiment, when the operation mode of the flap 71 is the swing operation mode, the wind direction restriction control is executed when the humidity is equal to or higher than a predetermined value, but is executed when the automatic wind direction change mode or the non-automatic wind direction change mode is performed. May be.

  For example, when the operation mode of the flap 71 is the automatic wind direction change mode, the indoor control unit 69 sets the “posture P1” if the humidity is equal to or greater than a predetermined value even if the conditions for setting the posture of the flap 71 to “posture P0” are met. ”Is selected.

  Further, when the operation mode of the flap 71 is the non-automatic wind direction changing mode, even if the user selects the “posture P0” of the flap 71 by the remote controller 99, the “posture P0” is not obtained if the humidity is equal to or higher than a predetermined value. , “Posture P1”.

  That is, the indoor control unit 69 restricts the upper limit of the movable range of the flap 71 when the humidity is equal to or higher than a predetermined value, so that the conditioned air does not hit the water retaining groove 53 and prevents the water retained in the water retaining groove 53 from being scattered. Is done.

(Modification 2)
In the above embodiment, the air direction restriction control is performed in the indoor unit 4 of the type in which the water retaining groove 53 holds the condensed water in the vicinity of the outlet 56, but is not limited thereto. For example, even if the indoor unit 4 according to the modified example 2 is an indoor unit of a type in which a nonwoven fabric is arranged instead of forming the water retaining groove 53, the effect similar to that of the above embodiment is achieved by performing the wind direction restriction control. Is obtained.

(Modification 3)
It is estimated that the dew condensation water in the water retaining groove 53 does not immediately disappear when the humidity is higher than a predetermined value and lower than the predetermined value. Therefore, in the indoor unit 4 according to the modified example 3, when the humidity falls from a predetermined value to less than the predetermined value, the wind direction restriction control is not released immediately, but is released after a predetermined time has passed, and the flap 71 The range of the swing is set from “posture P1 to posture P4” to “posture P0 to posture P4”.

  As a result, even when the humidity drops below the predetermined value from the predetermined value or higher while the water that is scattered by the conditioned air remains in the water holding groove 53, the predetermined time passes and the water is retained in the water holding groove 53. The range of swing of the flap 71 is set from “posture P1 to posture P4” to “posture P0 to posture P4” after the water being reduced to such an extent that it is not scattered by the conditioned air. As a result, water scattering is prevented.

  As described above, according to the present invention, a phenomenon in which the dew condensation water in the vicinity of the air outlet is blown away by the air is less likely to occur.

4 Indoor unit 53 Water retention groove 56 Air outlet 64 Humidity sensor (humidity detection part)
69 Indoor control unit 71 Flap

Japanese Patent Laid-Open No. 7-324802

Claims (3)

It is an indoor unit of an air conditioner that blows conditioned air from an air outlet (56) to an air conditioned space,
A water retaining groove (53) provided in the vicinity of the air outlet (56) and holding water condensed in the vicinity of the air outlet (56);
A flap (71) for changing the air direction of the conditioned air blown out from the air outlet (56);
A humidity detector (64) for detecting the humidity of the air-conditioned space;
A control unit (69) for controlling the operation of the flap (71) based on a preset operation mode of the flap (71);
With
The operating mode of the flap (71) is:
Swing operation mode that reverses the operation direction every predetermined period;
An automatic wind direction change mode for automatically changing the wind direction of the conditioned air;
A non-automatic wind direction change mode for changing the wind direction of the conditioned air according to an operation input to the remote control device when the control unit (69) has a remote control device;
Including
When the humidity of the air-conditioning target space is equal to or higher than a predetermined value in at least the swing operation mode among the three operation modes of the flap (71) , the control unit (69) The minimum opening for the air outlet (56) is operated to be larger than the minimum opening for the air outlet (56) of the flap (71) when the humidity of the air-conditioning target space is less than a predetermined value. Wind direction restriction control,
In addition, the control unit (69) is configured such that the minimum distance of the flap (71) to the water retention groove (53) when the humidity of the air-conditioning target space is equal to or higher than a predetermined value during the air direction restriction control is the air-conditioning target. Operate the flap (71) so as to be larger than the minimum distance to the water retaining groove (53) when the humidity of the space is less than a predetermined value;
Furthermore, when the humidity of the air-conditioning target space is less than the predetermined value from the predetermined value or more, the control unit cancels the wind direction restriction control after a predetermined time has elapsed since then.
Indoor unit (4) of air conditioner. The water retention groove (53) is located on the blowing direction side when the conditioned air is blown horizontally from the blowout port (56).
The indoor unit (4) of the air conditioning apparatus according to claim 1 . The controller (69) can switch the posture of the flap (71) in a plurality of stages within a movable range by changing the angle of the flap (71) with respect to the horizontal direction, and during the wind direction restriction control, Limiting the upper limit of the movable range of the flap (71);
The indoor unit (4) of the air conditioning apparatus according to claim 2 .

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