KR20120010106A - Air conditioner - Google Patents

Abstract

PURPOSE: An air conditioner is provided to prevent the formation of dew on the horizontal flap regardless of the operation of a compressor of an outdoor unit. CONSTITUTION: An air conditioner comprises a horizontal flap(60) and a controller. The horizontal flap is installed in a diffuser of a wall-mounted indoor unit and controls the upward and downward ventilation angles of a blower fan(31A). If the inclined angle of the horizontal flap sets an angle that increases flow resistance of the ventilation, the RPMs of the blower fan are lowered, and when the duration of a cooling operation reaches a predetermined time, the controller varies the inclined angles of the horizontal flap to reduce the flow resistance of the ventilation.

Description

Air Conditioning Unit {AIR CONDITIONER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a horizontal flap for adjusting the angle of blowing in an up and down direction at an outlet of an indoor unit.

Conventionally, the temperature of the indoor heat exchanger detected by the temperature detection means during the cooling operation in the air conditioner having a horizontal flap for adjusting the angle of blowing in the vertical direction at the outlet of the indoor unit connected to the outdoor unit is below a predetermined reference temperature. It is known that condensation is likely to occur in the horizontal flap when there is a certain period of time, and it is known to perform anti-dew attachment control to increase the rotation speed of the blowing fan of the indoor unit by a predetermined amount (for example, a patent See Document 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 10-253136

However, in the above-described conventional configuration, the amount of evaporation of the refrigerant of the indoor heat exchanger during the cooling operation is changed by the dew attachment prevention control in order to increase the rotation speed of the blowing fan of the indoor unit in order to prevent dew deposition. This may affect the operation of the compressor of the outdoor unit. In particular, when a plurality of indoor units are connected to the outdoor unit, the dew point preventing control may change the operation state of the compressor of the outdoor unit and affect the operation of other indoor units.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and an object of the present invention is to prevent dew from adhering to a horizontal flap without affecting the operation of the compressor of an outdoor unit in an air conditioner having a horizontal flap.

In order to achieve the above object, the present invention is an air conditioner having a horizontal flap for adjusting the angle of the blowing from the blowing fan in the vertical direction at the outlet of the indoor unit of the wall-mounted indoor unit, the inclination angle of the horizontal flap is The flow resistance of the blower is set at an angle at which the flow resistance is increased, the rotation speed of the blower fan is set at a low revolution speed, and the inclination angle of the horizontal flap is set when the duration of the cooling operation reaches a predetermined time. It is characterized by including the control part which changes to an upward or downward angle so that it may become small.

In the above configuration, the inclination angle of the horizontal flap can be set in a plurality of stages, the rotation speed of the blowing fan can be set in a plurality of stages, and the control unit is the most horizontal of the inclination angle of the horizontal flap among the plurality of stages The inclination angle of the horizontal flap is set to the lowest rotation speed among the plurality of stages, and the inclination angle of the horizontal flap is at least once when the duration of the cooling operation reaches a predetermined time. (一段) You may change to the downward angle of inclination.

In addition, the angle at which the controller changes the inclination angle of the horizontal flap to an upward or downward angle may be at least once upward or at least once downward.

The indoor unit may be connected to a multi-type air conditioner in which a plurality of indoor units are connected to an outdoor unit.

Further, in the configuration in which the control unit changes the inclination angle of the horizontal flap downward, the angle at which the flow resistance of the blower increases in the setting of the inclination angle of the horizontal flap is opened at the setting of the inclination angle of the horizontal flap. It may be the top of the state.

The control unit may display on the remote controller of the indoor unit the change of the horizontal flap to the angle.

After the control unit changes the horizontal flap to the angle, any one of an instruction to change the inclination angle of the horizontal flap, an instruction to change to heating operation or a blow operation, and an instruction to change the rotation speed of the blowing fan. The angle may be maintained until one instruction is made.

Moreover, you may provide the unevenness | corrugation which suppresses generation | occurrence | production of turbulence in the said horizontal flap.

According to the present invention, in the air conditioner provided with the horizontal flap, dew can be prevented from being attached to the horizontal flap without affecting the operation of the compressor of the outdoor unit.

1 is a refrigerant circuit diagram of an air conditioner of the present invention.
2 is a cross-sectional view of the indoor unit.
3 is an exploded perspective view of the indoor unit.
4 is a perspective view of the indoor unit viewed from below.
5 is a cross-sectional view of the indoor unit.
6 is a cross-sectional view of the indoor unit.
Fig. 7 is a flowchart showing the process of dew point prevention operation.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

1 is a refrigerant circuit diagram of an air conditioner of the present invention. First, the configuration of the refrigerant circuit 5 of the air conditioner 100 will be described.

The air conditioner 100 has an outdoor unit 6 installed outdoors and a plurality of (eg, three) indoor units 12A-12C installed in a different room, respectively, and an outdoor refrigerant of the outdoor unit 6. The piping 7 and the indoor refrigerant pipes 14A to 14C of the indoor units 12A to 12C are connected by the connection pipe 58. That is, the air conditioner 100 is a so-called multi-type air conditioner in which a plurality of indoor units 12A to 12C are connected to one outdoor unit 6.

As shown in FIG. 1, the compressor 8 is disposed in the outdoor refrigerant pipe 7. An accumulator (9) is arranged on the suction side of the compressor (8) in the outdoor refrigerant pipe (7), and on the discharge side, the four-way valve (18), the outdoor heat exchanger (19), and the outdoor unit are provided via an oil separator (17). Expansion valve 20 and receiver 21 are arranged one by one. Moreover, the outdoor heat exchanger 19 arrange | positions the outdoor fan 25 which blows toward this outdoor heat exchanger 19 adjacently. The outdoor unit 6 also has an outdoor unit side control unit 75 that controls the outdoor expansion valve 20, the compressor 8, the outdoor fan 25, the four-way valve 18, and the like.

Meanwhile, indoor heat exchangers 29A to 29C are disposed in each indoor refrigerant pipe 14A to 14C in each indoor unit 12A to 12C. In addition, indoor expansion valves 30A to 30C are disposed in each of the indoor refrigerant pipes 14A to 14C in the vicinity of each of the indoor heat exchangers 29A to 29C. Blowing fan 31A-31C is arrange | positioned adjacent to each indoor heat exchanger 29A-29C, respectively, and each blower fan 31A-31C blows with each indoor heat exchanger 29A-29C, respectively.

Moreover, each indoor unit 12A-12C has indoor unit side control parts 76A-76C (control part) which control a blower fan 31A-31C, indoor expansion valves 30A-30C, etc. To each indoor unit side control unit 76A to 76C, remote controllers 77A to 77C for the user to operate the indoor units 12A to 12C are respectively connected.

In the air conditioner 100, the cooling operation or the heating operation is switched by switching the four-way valve 18. When the four-way valve 18 is switched to the cooling side, the refrigerant flows along the solid arrows shown in FIG. 1, the outdoor heat exchanger 19 is a condenser, the indoor heat exchangers 29A to 29C are evaporators, and the compressor 8 The refrigerant discharged from the four-way valve 18, the outdoor heat exchanger 19, the outdoor expansion valve 20, the connection pipe 58, each indoor heat exchanger (29A ~ 29C), the connection pipe 58 and the four-way valve It passes in the order of (18), returns to the suction side of the compressor 8, and becomes the cooling operation state which each indoor heat exchanger 29A-29C cools a room. In the cooling operation, the respective valve openings of the indoor expansion valves 30A to 30C are adjusted according to the air conditioning load.

When the four-way valve 18 is switched to the heating side, the refrigerant flows along the broken arrow shown in FIG. 1, the indoor heat exchangers 29A to 29C are the condensers, and the outdoor heat exchanger 19 is the evaporator. The refrigerant discharged from (8) includes four-way valve 18, connection pipe 58, each indoor heat exchanger 29A to 29C, connection pipe 58, outdoor expansion valve 20, outdoor heat exchanger 19 and It passes in the order of the four-way valve 18, returns to the suction side of the compressor 8, and becomes the heating operation state which each indoor heat exchanger 29A-29C heats an interior. In the heating operation, the respective valve openings of the outdoor expansion valve 20 and the indoor expansion valves 30A to 30C are adjusted according to the air conditioning load.

In addition, the air conditioner 100 can perform a blowing operation of driving each blowing fan 31A to 31C in the state in which the thermostat is turned off when the compressor 8 is stopped.

2 is a cross-sectional view of the indoor unit 12A. 3 is an exploded perspective view of the indoor unit 12A.

The indoor units 12A to 12C are wall-mounted indoor units mounted on the wall W of the indoor air conditioner. Since each indoor unit 12A-12C is comprised similarly, the indoor unit 12A is demonstrated below.

As shown in FIG. 2 and FIG. 3, the indoor unit 12A arranges a fin and tube type indoor heat exchanger 29A formed in a substantially 'C' cross section on the frame 3, and The blower fan 31A is arranged inside the indoor heat exchanger 29A, and the grill 10 is covered with the indoor heat exchanger 29A. The frame 3 is a member formed in a substantially 'L' shape in cross section by resin molding, and accommodates a drain pan 34 and a blower fan 31A which receive drain water flowing from the indoor heat exchanger 29A. A scroll portion 32 is provided, and a recess for accommodating the hanging claws 51 of the mounting plate 50 is formed on the rear surface of the frame 3. The case of the indoor unit 12A is formed by this frame 3 and the grille 10.

The frame 3 and the mounting plate 50 and the frame 3 and the grill 10 are connected to each other by screws, and a service hole 15 for screwing is opened on the lower surface of the grill 10. have. The service hole 15 is closed by the cap 14 in normal use.

The blower fan 31A is composed of a so-called cross flow fan, and is accommodated between the tongue portion 48 provided in the frame 3 and the scroll portion 32, and the blower fan 31A extends in a cylindrical shape. Both ends of are supported by the frame 3 through the bearing portion 44 and the bearing portion 45 having the bearing 43.

A fan motor 46 is connected to one end of the blower fan 31A, and the fan motor 46 is mounted to the frame 3 via the bearing 47. More specifically, one end of the blower fan 31A is provided with a hole 41 into which the output shaft of the fan motor 46 is inserted, and the output shaft of the fan motor 46 inserted into the hole 41 is a blower fan. It is fixed to the blower fan 31A by a set screw 42 which is screwed in from the side surface of 31A. Moreover, the electric field box 55 which accommodates 76 A of indoor unit side control parts is arrange | positioned at the side of the fan motor 46. As shown in FIG.

In the lower part of the back side of the frame 3, the piping accommodating part 33 which is a space of elongate shape for accommodating a refrigerant piping or a drain pipe is formed, and the piping which pushes in the said piping in the piping accommodating part 33 is carried out. The pressing parts 52 and 53 are mounted.

The front panel 16 is attached to the grill 10 so that the upper surface suction port 11A and the front suction port 11B extend in the longitudinal direction of the indoor unit 12A, and cover the front suction port 11B.

The lower surface of the indoor unit 12A has an ejection surface 35 which is inclined downward toward the wall W side continuously to the lower edge of the front panel 16, and is substantially horizontal to the wall W side from the ejection surface 35. The lower surface 37 which extends is formed. A blowout outlet 13 for blowing air from the blower fan 31A is provided on the blowout surface 35, and the blowout outlet 13 is closed to be opened and closed by plate-shaped flaps 60 and 60 (horizontal flaps). have.

The blower fan 31A sucks indoor air from the upper inlet 11A and the front inlet 11B through the indoor heat exchanger 29A, and the air heat-exchanged in the indoor heat exchanger 29A is discharged from the outlet 13. Iv) Take out into the harmony room. Between the blower fan 31A and the blower outlet 13, the guide chamber 36 which guides the blowing from the blower fan 31A to the blower outlet 13 is provided. The upper surface of the guide chamber 36 is formed by the lower part of the drain pan 34 which is inclined toward the lower side of the front side of the indoor unit 12A, and the lower part of the guide chamber 36 has the lower side of the front side of the indoor unit 12A. It is formed by the lower part of the scroll part 32 which inclined toward it. The air blown out from the blowout port 13 is guided by the guide chamber 36, and flows toward the front of the slope in front of the indoor unit 12A.

In addition, the blower fan 31A is configured to be switchable in three stages of high, medium, and low rotational speed, and the higher the rotational speed, the larger the discharge air volume of the blower fan 31A. That is, according to the rotation speed of the blower fan 31A, the air volume is set to strong, medium or weak.

The flaps 60 and 60 are two horizontal vanes which adjust the wind direction of the blowing blown out from the blower outlet 13 up and down. Each flap 60 is formed in the shape of a plate extending in the longitudinal direction of the indoor unit 12A, and has a flap shaft 61 extending in the longitudinal direction of the flap 60. Each flap 60 is rotated up and down about the flap shaft 61. The two flaps 60 and 60 are driven in conjunction with the flap drive motor 63 of the indoor unit 12A to open and close the outlet 13 so as to maintain a substantially parallel positional relationship with each other. The wind direction taken out from 13) is changed in the vertical direction. The flaps 60 and 60 are formed with dimple 60A (unevenness) which suppresses the generation of turbulence around the upper and lower surfaces of the flaps 60 and 60.

Moreover, the some vertical wing | wing 85 which adjusts the wind direction to the left and right is arrange | positioned by the exit side of the scroll part 32 side by side. A plurality of vertical wings 85 (five in this embodiment) are one set, and are connected by the link member 87 on the back surface side of the scroll part 32. The vertical vane 85 is connected to a vertical vane driving motor (not shown), and turns to the left and right in accordance with the operation of the vertical vane driving motor or the operation of the front end of the operation lever 86.

A fan guard 70 is provided between the longitudinal wing 85 and the flap 60 to prevent the user from putting his or her hand inside the ejection opening 13. The fan guard 70 includes two wires 71 and 71 extending parallel to each other along the longitudinal direction of the outlet 13, and supports 72 and 73 which bind end portions of the wires 71 and 71. do.

4 is a perspective view of the indoor unit 12A viewed from below. In addition, the illustration of the flap 60 is abbreviate | omitted in this FIG. 4 for convenience of understanding.

The support body 72 of the fan guard 70 is attached to one end side of the rectangular ejection opening 13, and the support body 73 is attached to the other end side of the ejection opening 13. As shown in FIG.

Moreover, the ejection opening 13 is provided with two support | pillars 65 which support the flap 60 so that it may be divided | segmented into the longitudinal direction of 12 A of indoor units. Each strut 65 is interposed between the upper edge portion 13a and the lower edge portion 13b of the outlet 13, and the flap shafts 61 and 61 of the two flaps 60 and 60 are inserted. It has two support holes 66 and 66. The flap support part 68 for mounting the flap 60 is provided in the both ends of the outlet port 13, respectively, and each of these flap support parts 68 of the left and right flap shafts 61 of the two flaps 60 and 60 are provided. And 61 have support holes 69 and 69 into which they are inserted. That is, each flap 60 is supported by the two support | pillars 65 and the two flap support parts 68 so that rotation is possible. The fan guard 70 is mounted so that the wire 71 is located inward of the support holes 66 and 69 on which the flap 60 is mounted and in front of the longitudinal vanes 85.

By the way, in the indoor unit 12A, if the cooling operation is continued, the temperature of the flaps 60 and 60 decreases, and the indoor air having a relatively high temperature is brought into contact with the flaps 60 and 60 where the temperature has decreased. Condensation may occur at 60, 60). Therefore, in the present embodiment, in the operating state where condensation tends to occur, dew preventing prevention operation is performed to prevent the occurrence of condensation by changing the directions of the flaps 60 and 60. Hereinafter, the dew adhesion prevention operation will be described.

5 and 6 are cross-sectional views of the indoor unit 12A.

In 12 A of indoor units, the flaps 60 and 60 are comprised so that adjustment of the opening degree to five steps is possible. In detail, the flaps 60 and 60 have the fully closed state of the ejection opening 13 shown in FIG. 2 as the uppermost stage, and as shown in FIGS. 5 and 6, the flaps 60 and 60 gradually move in the vertical direction for each step. The tilt angle changes in the tilting direction. At the lowest end of the adjustment range of the flaps 60 and 60, the inclination angles of the flaps 60 and 60 are closest to the vertical direction in the adjustable range.

The uppermost end in the open state of the flaps 60 and 60 is the state shown in FIG. 5, and this state is a state in which the flaps 60 and 60 are inclined downward by one end from the fully closed state. The state of FIG. 6 is a state in which the flaps 60 and 60 are inclined downward by one end from the top end in the open state shown in FIG. Hereinafter, the position at the top of the open state of the flaps 60 and 60 is made into the inclination angle P1 (the angle at which the flow resistance becomes large), and the state inclined downward by one step from the inclination angle P1 is the inclination angle P2 (the downward direction). Angle). Tilt angles P1 and P2 are angles based on the horizontal state. Here, as an example, the difference between the inclination angle P1 and the inclination angle P2 is 15 degrees.

When the flaps 60 and 60 are at the inclination angle P1, the inclination angles of the flaps 60 and 60 are the angles closest to the horizontal in the open state, and this angle is an angle suitable for the cooling operation and the flap ( The air guided by 60, 60) reaches the farthest point. As the inclination angles of the flaps 60 and 60 are inclined downward, the air guided by the flaps 60 and 60 becomes downward and the reach distance is shortened.

As shown in FIG. 5, in the state at the inclination angle P1, the ventilation resistance (flow resistance) with respect to the airflow Y blown out through the flaps 60 and 60 is large, and the lower surfaces of the flaps 60 and 60 are large. The turbulence D which winds up the air around the flaps 60 and 60 arises. For this reason, when the flaps 60 and 60 are excessively cooled in the state of the inclination angle P1, the air which has been wound up condenses and dew adheres to the lower surfaces of the flaps 60 and 60. The turbulent flow D, which winds up the air around the flaps 60 and 60, is particularly likely to occur when the rotation speed of the blower fan 31A is low and the air volume is weak, and the rotation speed of the blower fan 31A is high. In rare cases.

As shown in FIG. 6, in the state with the inclination angle P2, the ventilation resistance with respect to the airflow Z blown out through the flaps 60 and 60 is small, and the turbulence D is almost in the lower surface of the flaps 60 and 60. As shown in FIG. Does not occur. For this reason, dew adhesion does not generate | occur | produce on the lower surface of flaps 60 and 60 in the state in inclination angle P2. In other words, by operating the flaps 60 and 60 at the inclination angle P2 during the cooling operation, dew adhesion to the flaps 60 and 60 is prevented.

It is confirmed by experiment in actual machine that dew attachment is prevented by changing flap 60,60 from inclination angle P1 to inclination angle P2 at the time of cooling operation with a weak air volume.

Here, as a factor in which turbulence D is generated around the flaps 60 and 60 in the state of inclination angle P1 as described above, in the state of inclination angle P1, the indoor unit is driven by the guide chamber 36 from the blower fan 31A. The flaps 60 and 60 are inclined with respect to the direction of airflow X guided to the front lower side of 12A, and the ventilation resistance is large. On the other hand, in the state inclination angle P2, flaps 60 and 60 are arrange | positioned substantially parallel with respect to airflow X, and ventilation resistance is small.

Next, the processing of the dewing prevention operation will be described in detail.

Fig. 7 is a flowchart showing the process of dew point prevention operation.

First, during operation of the indoor unit 12A, the indoor unit side control unit 76A determines whether the dew preventing prevention flag is in the ON state (step S11). Here, the dew preventing flag is a flag that is turned on when dew is likely to occur in the flaps 60 and 60 based on the conditions described below, and is written in the memory of the indoor unit side control unit 76A. do.

If the dewing prevention flag is not ON in the determination of step S11 (step S11: NO), the indoor unit side control unit 76A determines whether the indoor unit 12A is in operation other than during heating operation or blowing operation ( Step S12).

In the determination of step S12, when the indoor unit 12A is performing an operation other than during the heating operation or the blowing operation, that is, when the cooling operation is executed (step S12: YES), the indoor unit side control unit 76A It is determined whether or not the thermostat is ON (step S13).

In the determination of step S13, when the thermostat is ON (step S13: YES), the indoor unit side control unit 76A determines whether or not the setting of the air volume of the blower fan 31A is weak (step S14).

If the setting of the air volume of the blower fan 31A is weak in the determination of step S14 (step S14: YES), the indoor unit side control unit 76A determines whether the positions of the flaps 60 and 60 are the inclination angle P1 (step S14). S15).

In the determination of step S15, when the positions of the flaps 60 and 60 are the inclination angle P1 (step S15: YES), the indoor unit side control unit 76A adds the count value of the timer by a predetermined amount (step S16), and then Then, it is determined whether or not the count value of the timer has reached the predetermined time T (step S17).

In the determination of step S17, when the count value of the timer reaches the predetermined time T (step S17: YES), the indoor unit side control unit 76A turns ON the dew preventing prevention flag (step S18).

That is, in the condition that the dew preventing prevention flag is set to the ON state by the processing of steps S12 to S17, the setting of the air volume of the blower fan 31A is weak, and the flaps 60 and 60 are the inclination angle P1. This is the case when the cooling operation with the stat ON is continuously operated for a predetermined time T. In the ON state of the dewing prevention flag, since the air volume is weak and the flaps 60 and 60 are in a position close to horizontal, turbulent flow D occurs around the flaps 60 and 60, and dew is likely to occur. The predetermined time T is set to one hour as an example.

In the determination of step S17, when the count value of the timer does not reach the predetermined time T (step S17: NO), the indoor unit side control unit 76A ends the processing of the dew attachment prevention operation. Processing of the dewing prevention operation is repeatedly performed at predetermined time intervals, and here, as an example, it is executed every 1 sec. The count value of the timer is added each time step S16 is repeated.

In addition, when the indoor unit 12A is in the heating operation or the blowing operation (step S12: no) by the determination of step S12, and the thermostat is OFF by the determination of step S13 (step S13: no), it blows by the determination of step S14. When the air volume of the fan 31A is set to medium or strong (step S14: no), and when the flaps 60 and 60 are at an inclination angle other than the inclination angle P1 (step S15: no) when the determination of step S15 is made (step S15: no) The side control unit 76A clears the count value of the timer in step S16 (step S19), and ends the processing for preventing dewing operation.

When the dewing prevention flag is in the ON state in the determination of step S11 (step S11: YES), the indoor unit side control unit 76A determines whether the inclination angles of the flaps 60 and 60 are changed (step S11). S20). In the determination of step S20, when the inclination angle of the flaps 60 and 60 is not changed from the inclination angle P1 (step S20: NO), the indoor unit side control unit 76A determines that the operation mode of the indoor unit 12A is heating operation or It is discriminated whether or not it is changed by the blowing operation (step S21).

In the determination of step S21, when the operation mode of the indoor unit 12A is not changed to heating operation or blowing operation (step S21: NO), that is, when the cooling operation is continued, the indoor unit side control unit 76A blows air. It is determined whether or not the setting of the air volume of the fan 31A is changed from weak (step S22).

In the determination of step S22, when the setting of the air volume of the blower fan 31A is not changed from weak (step S22: NO), the indoor unit side control unit 76A controls the flap drive motor 63, so that the flap 60 , The inclination angle of 60 is changed from the inclination angle P1 to the inclination angle P2 (step S23). Next, the flaps 60 and 60 are changed to the inclination angle P2 by the anti-dew control to the remote controller 77A. It is displayed. Thereafter, the indoor unit side control unit 76A ends the processing of the dew attachment prevention operation.

In addition, when the inclination angle P1 of the flaps 60 and 60 is changed by the determination of step S20 (step S20: Yes), the operation mode of the indoor unit 12A is changed to heating operation or air blowing operation by the determination of step S21, and If there is (step S21: yes) and if the air flow fan 31A setting is changed from weak at step S22 (step S22: yes), the indoor unit side control unit 76A turns off the dew preventing prevention flag. It returns to a state (step S24), and complete | finishes the process of the dew sticking prevention operation. Therefore, in the state where the flaps 60 and 60 are changed to the inclination angle P2 by dew attachment control, the indoor unit side control part 76A instruct | indicates the change of the inclination angle of the flaps 60 and 60, heating operation, or air blowing. The flaps 60 and 60 are held at the inclination angle P2 until either one of the instruction to change to the operation and the instruction to change the rotational speed of the blower fan 31A is made.

Here, the instruction of the change of the inclination angle, the instruction of the change of the operation mode such as the change to the heating operation, and the instruction of the change of the setting of the air volume of the blower fan 31A are performed by the remote controller 77A operated by the user. All.

That is, the condition that the indoor unit side control unit 76A forcibly changes the inclination angles of the flaps 60 and 60 from the inclination angle P1 to the inclination angle P2 is that the inclination angle of the flaps 60 and 60 when the dew attachment prevention flag is ON. The cooling operation is continued at this inclination angle P1, and the air volume of the blower fan 31A is not changed from about. In this way, when the dew point to the flaps 60 and 60 is in an operating state that is likely to occur, the dew point to the flaps 60 and 60 is effectively prevented because the angle is changed to the inclination angle P2 where dew does not occur. can do.

In addition, since the inclination angles of the flaps 60 and 60 are not changed to the inclination angle P2 when the air volume of the blower fan 31A is not weak, the inclination angle is changed in the case of an operating state in which there is little possibility of dew formation. The indoor unit side control unit 76A can drive in the wind direction in accordance with the intention of the user without being arbitrarily changed to the inclination angle P2.

In addition, since the inclination angle is not changed to the inclination angle P2 unless the inclination angles of the flaps 60 and 60 are not the inclination angle P1, the inclination angle is the inclination angle P2 in the case of an operating state in which there is little possibility of dew attachment. It is possible to drive in the wind direction in accordance with the intention of the user without being changed arbitrarily.

Moreover, in the air conditioner 100, since dew point can be prevented from the indoor unit 12A side by controlling the inclination angles of the flaps 60 and 60 by the inclination angle P2 by the indoor unit side control unit 76A, dew is attached. It is not necessary to change the rotation speed of the blower fan 31A in order to prevent the damage. As a result, since the amount of evaporation of the refrigerant in the indoor heat exchanger 29A does not change by the dewing prevention operation, the rotation speed of the compressor 8 of the outdoor unit 6 can be prevented from being affected by the dewing prevention operation. have.

As described above, according to the present embodiment, the inclination angles of the flaps 60 and 60 are set to the inclination angle P1 at which the ventilation resistance of the blowing air is increased, and the rotation speed of the blower fan 31A is set to a low rotation speed. Further, when the duration of the cooling operation reaches the predetermined time T, the indoor unit side control unit 76A changes the inclination angles of the flaps 60 and 60 to the downward inclination angle P2 so that the ventilation resistance becomes smaller, so that the flap ( Dew attachment can be prevented only by changing the inclination angles of the 60 and 60, and the dew attachment to the flaps 60 and 60 can be prevented without affecting the operation of the compressor 8 of the outdoor unit 6. Can be. In addition, dewdropping to the flaps 60 and 60 can be prevented with a simple configuration without using a temperature sensor for measuring the temperature of the indoor heat exchanger 29A.

In addition, when the flaps 60 and 60 are set to the inclination angle P1 close to horizontal, the blowing fan 31A is set to the lowest rotational speed, and the continuation time of the cooling operation reaches the predetermined time T, the indoor unit The side control unit 76A changes the flaps 60 and 60 to the downward inclination angle P2 falling from the horizontal, and changes the flaps 60 and 60 to the downward angle based on the duration of the cooling operation. For this reason, dew attachment can be prevented only by changing the inclination angle of flaps 60 and 60, and it does not affect the operation of the compressor 8 of the outdoor unit 6, and it does not affect the flaps 60 and 60. Dew can be prevented. In addition, since the inclination angles of the flaps 60 and 60 are changed from the inclination angle P1 that is closest to the horizontal in the open state, the inclination angle P2 of the flap 60 and 60 is downward, so that it is noticeable that the angles of the flaps 60 and 60 are changed. You can prevent it.

In addition, since the inclination angles of the flaps 60 and 60 are controlled to the inclination angle P2 by the indoor unit side control unit 76A in the multi-type air conditioner 100, dew can be prevented from the indoor unit 12A side. It is not necessary to change the rotation speed of the blower fan 31A in order to prevent dewing. As a result, the amount of evaporation of the refrigerant of the indoor heat exchanger 29A does not change due to the dewing prevention operation, and the rotation speed of the compressor 8 of the outdoor unit 6 can be prevented from affecting the dewing prevention operation. Therefore, it is possible to prevent the dewing preventing operation of the indoor unit 12A from affecting the operation of the indoor units 12B and 12C.

Moreover, the setting which becomes the closest horizontal angle when the flaps 60 and 60 are in the open state is the inclination angle P1 which is the uppermost end of the open state in the setting of the inclination angle of the flaps 60 and 60, and once from the inclination angle P1. Only by setting the downward inclination angle P2 can the dew sticking of the flaps 60 and 60 be prevented. In addition, since the inclination angle is changed to the inclination angle P2 downward by only one end, it is possible to secure the reaching distance of the blowing air while preventing the dew attachment.

In addition, since the inclination angles of the flaps 60 and 60 are displayed on the remote controller 77A of the indoor unit 12A, the user can know that the inclination angles have been changed. That is, in the present embodiment, since the flaps 60 and 60 are changed to the inclination angle P2 below by one end by the dewing prevention operation, it is not noticeable that the inclination angles of the flaps 60 and 60 are forcibly changed. By confirming the display of the remote controller 77A, the user can know that the inclination angle P2 has been changed by the dew preventing operation.

Further, the indoor unit side control unit 76A is any one of an instruction to change the inclination angle of the flaps 60 and 60, an instruction to change to heating operation or a blowing operation, and an instruction to change the rotation speed of the blower fan 31A. Since the flaps 60 and 60 are held at the inclination angle P2 until the instruction of is given, it is possible to reliably prevent the dew attachment to the flaps 60 and 60 in the operating state where dew is likely to be attached.

In addition, since the generation of turbulence D can be suppressed by the dimples 60A provided on the upper and lower surfaces of the flaps 60 and 60, dew adhesion of the flaps 60 and 60 can be prevented.

In addition, the said embodiment shows the form which applied this invention, and this invention is not limited to this.

In the above embodiment, the airflow resistance of the air flow passing through the flaps 60 and 60 is increased at the inclination angle P1 at the top of the open state of the flaps 60 and 60, but the horizontal flap is not limited thereto. The ventilation resistance of the air stream passing through varies depending on the shape of the blowout port 13 and the arrangement position of the horizontal flap, and is not necessarily increased at the top of the horizontal flap. That is, depending on the shape of the outlet 13 and the arrangement position of the horizontal flap, the ventilation resistance is decreased at the tilt angle P1, and the ventilation resistance is increased at the tilt angle P2, so that the dew flaps of the horizontal flap are increased at the tilt angle P2. You can think of what happens. In this case, the ventilation resistance can be reduced by changing the inclination angle upward once to make the inclination angle P1 while the horizontal flap is being cooled at the inclination angle P2, thereby preventing dew from adhering to the horizontal flap. That is, in the said embodiment, since dew adhesion generate | occur | produces in inclination angle P1, although the inclination angle was changed into downward inclination angle P2 once, it is not limited to this, In short, it is thought that dew adhesion will arise. If the operation at the position reaches the predetermined time T, the position is changed. Therefore, the change position may be an upward angle including at least one upward direction.

In addition, although the above embodiment was described as changing from the inclination angle P1 to the inclination angle P2 downward, the present invention is not limited to this, and the inclination angle at which the ventilation resistance decreases is determined by the shape of the outlet 13 and the arrangement position of the horizontal flap. In the case where the downward angle is further lowered by the influence of, the dew attachment may be prevented by changing the inclination angle from the inclination angle P1 to two or more steps downward.

In addition, in the said embodiment, although the example which demonstrated that the air conditioner 100 is a multi-type air conditioner was described, this invention is not limited to this, For example, one indoor unit is provided with respect to one outdoor unit. The present invention may be applied to an air conditioner.

6 Outdoor unit P1 tilt angle (angle at which the flow resistance becomes large)
P2 Tilt Angle (Downward Angle) 12A, 12B, 12C Indoor Unit
13 blowout fan 31A, 31B, 31C
60, 60 flap (horizontal flap) 60A dimple (uneven)
75 Outdoor unit side control
76A, 76B, 76C Indoor unit side control part (control part)
77A, 77B, 77C Remote Controller
100 Air Conditioning Unit

Claims (8)

In the air-conditioning apparatus provided with the horizontal flap which adjusts the angle of the blowing from a blowing fan to an up-down direction in the outlet of a wall-mounted indoor unit,
When the inclination angle of the horizontal flap is set to an angle at which the flow resistance of the blowing is increased, the rotation speed of the blowing fan is set to a low rotation speed, and when the duration of the cooling operation reaches a predetermined time, the horizontal And a control unit for changing the inclination angle of the flap to an upward or downward angle so that the flow resistance of the blower becomes small. The method according to claim 1,
The tilt angle of the horizontal flap can be set in multiple stages,
The rotation speed of the blowing fan can be set in a plurality of stages,
The control unit is set to the inclination angle of the horizontal flap to the closest horizontal inclination angle of the plurality of stages, the blowing fan rotation speed is set to the lowest rotation speed among the plurality of stages, and the duration of the cooling operation is predetermined And the inclination angle of the horizontal flap is changed to at least one inclination inclination angle when the time is reached. The method according to claim 1,
And the indoor unit is connected to a multi-type air conditioner to which the plurality of indoor units are connected to an outdoor unit. The method according to claim 2,
And the indoor unit is connected to a multi-type air conditioner to which the plurality of indoor units are connected to an outdoor unit. The method according to any one of claims 1 to 4,
In the configuration in which the control unit changes the inclination angle of the horizontal flap downward, the angle at which the flow resistance of the blower is increased at the setting of the inclination angle of the horizontal flap is the highest end of the open state in the setting of the inclination angle of the horizontal flap. Air conditioner, characterized in that. The method according to any one of claims 1 to 4,
And the controller is configured to display, on the remote controller of the indoor unit, a change of the horizontal flap at the angle. The method according to any one of claims 1 to 4,
After the control unit changes the horizontal flap to the angle, any one of an instruction to change the inclination angle of the horizontal flap, an instruction to change to heating operation or a blow operation, and an instruction to change the rotation speed of the blowing fan. The air conditioner is maintained until the instruction is made. The method according to any one of claims 1 to 4,
And an unevenness for suppressing generation of turbulence in the horizontal flap.

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