JP4807285B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner.

Conventionally, an air conditioner has an air outlet closed when the operation is stopped (for example, see Patent Document 1). This is because the user of the living space tends to feel a draft when the air conditioner is stopped with the air outlet open.
JP-A-11-237104

  However, the conventional air conditioner has a problem that when it is placed on the floor, it cannot be taken out when foreign matter enters. Then, the subject of this invention is providing the air conditioner which opens and closes a blower outlet at the time of a driving | operation stop, and can reduce a draft feeling.

In order to solve the above-mentioned problems, the air conditioner of the present invention is a floor-standing type air conditioner, and includes a fan for blowing air, a plurality of air outlets for blowing air for air conditioning from the fan, and the plurality of air conditioners. A shutter for opening and closing at least one of the air outlets, a shutter drive unit for driving the shutter, a fan control unit for controlling the rotation speed of the fan, and a shutter control unit for controlling the shutter drive unit The shutter drive unit is controlled by the shutter control unit so as to perform an opening operation after the inertial rotation of the indoor fan stops when the shutter is in the fully closed position when the operation is stopped .

  Moreover, in the air conditioner of one embodiment, the plurality of outlets are at least an upper outlet and a lower outlet, and the shutter opens and closes the lower outlet.

According to the air conditioner having the above-described configuration, when the wind is blown from the plurality of outlets when the operation is stopped, and when at least one of the plurality of outlets is closed by the shutter, the inertial rotation of the indoor fan is performed. After stopping , the shutter drive unit is controlled to open the shutter. Thereby, retrieved since the shutter even when biting foreign materials is open, also be indoor fan is rotating by inertia, by controlling the shutter driving unit after inertial rotation of the indoor fan stops, opening the shutter Therefore, the draft feeling can be reduced.

  As is clear from the above, according to the air conditioner of the present invention, when wind is blown from the plurality of outlets at the time of operation stop, and at least one of the plurality of outlets is closed by the shutter After a predetermined time has elapsed, the control unit controls the shutter driving unit to open the shutter. As a result, even when a foreign object is caught, it can be taken out because the shutter is open.

  In addition, according to the floor-standing air conditioner of one embodiment, even when foreign matter such as coins or buttons is inserted from the upper outlet, the lower outlet is opened by the shutter when the operation is stopped. It can be taken out from the lower outlet. In addition, even if the operation is stopped when in the vicinity of the floor-type air conditioner, the fan rotates due to inertial rotation. Therefore, if the operation is stopped and the immediate lower outlet shutter is opened, a feeling of wind speed will be felt. When the lower outlet shutter is opened after a certain period of time, the fan is almost stopped, and the draft feeling from the outlet can be reduced.

  Hereinafter, the air conditioner of this invention is demonstrated in detail by embodiment of illustration.

  FIG. 1 shows a circuit diagram of a refrigerant circuit of an air conditioner according to an embodiment of the present invention. As shown in FIG. 1, this air conditioner has a compressor 1, a four-way valve 2 connected to one end of the discharge side of the compressor 1, and one end connected to the other end of the four-way valve 2. The outdoor heat exchanger 3, the electric expansion valve 4 having one end connected to the other end of the outdoor heat exchanger 3, and the indoor heat having one end connected to the other end of the electric expansion valve 4 via a closing valve 12 And an accumulator 6 having one end connected to the other end of the indoor heat exchanger 5 via a closing valve 13 and a four-way valve 2 and the other end connected to the suction side of the compressor 1. Yes. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the electric expansion valve 4, the indoor heat exchanger 5 and the accumulator 6 constitute a refrigerant circuit.

  The air conditioner also includes an outdoor fan 7 disposed in the vicinity of the outdoor heat exchanger 3, an indoor fan 8 disposed in the vicinity of the indoor heat exchanger 5, and a temperature sensor that detects the temperature of the indoor heat exchanger 5. 9, a shutter drive unit 31 that drives a shutter 30 (shown in FIG. 3), and the temperature of the indoor heat exchanger 5 detected by the temperature sensor 9, the compressor 1, the electric expansion valve 4, and the outdoor fan 7, a control device 11 for controlling the indoor fan 8, the shutter drive unit 31 and the like is provided.

  The control device 11 includes a microcomputer, an input / output circuit, and the like, and includes a shutter control unit 11a as an example of a control unit that controls the shutter drive unit 31.

  The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the electric expansion valve 4, the accumulator 6, the outdoor fan 7 and the control device 11 constitute the outdoor unit 10, the indoor heat exchanger 5, the indoor fan 8, and the temperature. The sensor 9 and the shutter drive unit 31 constitute the indoor unit 20.

  In the air conditioner having the above-described configuration, when the compressor 1 is started by switching the four-way switching valve 2 to the solid line switching position during the heating operation, the high-pressure refrigerant discharged from the compressor 1 passes through the four-way switching valve 2. And enters the indoor heat exchanger 5. Then, the refrigerant condensed in the indoor heat exchanger 5 enters the outdoor heat exchanger 3 after being decompressed by the electric expansion valve 4. The refrigerant evaporated in the outdoor heat exchanger 3 returns to the suction side of the compressor 1 through the four-way switching valve 2 and the accumulator 6. Thus, the refrigerant circulates through the refrigerant circuit constituted by the compressor 1, the indoor heat exchanger 5, the electric expansion valve 4, the outdoor heat exchanger 3, and the accumulator 6, thereby executing a refrigeration cycle. Then, the indoor fan 8 heats the room by circulating the room air through the indoor heat exchanger 5.

  On the other hand, at the time of cooling operation, the four-way switching valve 2 is switched to the dotted line switching position, and the refrigerant in the order of the compressor 1, the outdoor heat exchanger 3, the electric expansion valve 4, the indoor heat exchanger 5, and the accumulator 6. Execute a refrigeration cycle that circulates.

  FIG. 2 shows a perspective view of the indoor unit 20 of the air conditioner. As shown in FIG. 2, the indoor unit 20 has a substantially rectangular bottom frame 21 whose rear side is attached to the wall surface of the room, a front side of the bottom frame 21, and a substantially rectangular opening 22c on the front side. A front grille 22 (shown in FIG. 3) and a front panel 23 attached to cover an opening 22c (shown in FIG. 3) of the front grille 22.

  An upper air outlet 22 a is provided at the upper part of the front grill 22, and a lower air outlet 22 b is provided at the lower part of the front grill 22. A flap 24 is provided at the upper air outlet 22 a of the front grill 22. The flap 24 is rotated during the cooling operation and the heating operation so that cool air or warm air is blown forward and obliquely upward from the upper air outlet 22a, and when stopped, as shown in FIG. 22a is covered.

FIG. 3 shows a cross-sectional view of the indoor unit 20 of the air conditioner. As shown in FIG. 3, a motor 26 is fixed at the approximate center of the bottom frame 21. The indoor fan 8 to which the shaft of the motor 26 is connected is disposed on the bottom frame 21 so that the shaft is in the front-rear direction. The indoor fan 8 is a turbo fan that blows air sucked from the front side outward in the radial direction with respect to the shaft. A bell mouth 27 is provided on the bottom frame 21 on the front side of the indoor fan 8. The indoor heat exchanger 5 is disposed on the front side of the bell mouth 27 , the front grill 22 is attached to the front side of the indoor heat exchanger 5, and the front panel 23 is attached to the front side of the front grill 22. . A filter 25 is attached to the opening 22c of the front grill 22. A drain pan 28 is disposed below the bell mouth 27 and below the indoor heat exchanger 5.

  Further, a shutter 30 for opening and closing the lower air outlet 22b is disposed in the blowing passage below the front grill 22. The shutter 30 is rotated about a shaft 30a provided on the bottom frame 21 side by a shutter driving unit 31 (shown in FIG. 1), A shown by a one-dot chain line is in a fully open state, and B is in a fully closed state. is there.

  Next, according to the flowchart of FIG. 4, the operation | movement at the time of the operation stop of the control apparatus 11 of the said air conditioner is demonstrated.

  First, when the process at the time of stopping the operation of the air conditioner is started by a remote controller or the like, it is determined in step S1 whether the blower outlet setting is the two-way blow control or the one blow control. When it is control, it progresses to step S2, and when a blower outlet setting is two-way blowing control, a main body is stopped by the process of two-way blowing control. Here, the two-way blowing control is an operation control for blowing air from both the upper outlet 22a and the lower outlet 22b shown in FIG. 2, and the one blowing control is the lower side shown in FIGS. The air outlet 22b is closed by the shutter 30, and the operation is controlled only from one of the upper air outlets 22a.

Next, in step S2, if it is less than T1 time since the operation is stopped from a remote control returns to step S2, the process proceeds to step S3 if the T1 or more, opening the shutter 30 by the shutter controller 11a Stop the main unit. As a result, when the user stops the operation with the remote controller or the like during the one-sided blowing operation, the draft feeling is effectively prevented by opening the shutter 30 and preventing the wind from coming out even though the indoor fan 8 is rotating by inertia. Can be reduced.

  Further, by opening the shutter 30 when the operation is stopped, it is possible to easily remove the foreign matter from the upper air outlet 22a from the lower air outlet 22b without being caught on the A side.

In the above embodiment, a separate type air conditioner including an outdoor unit and an indoor unit has been described. However, as long as it has a plurality of outlets, the present invention is applied to an air conditioner having another configuration. Can do.

The circuit diagram of the refrigerant circuit of the air conditioner of one embodiment of the invention Perspective view of the indoor unit of the air conditioner Cross section of the indoor unit of the air conditioner Flowchart for explaining the operation of the control device of the air conditioner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Electric expansion valve 5 Indoor heat exchanger 6 Accumulator 7 Outdoor fan 8 Indoor fan 9 Temperature sensor 10 Outdoor unit 11 Controller 11a Temperature discrimination | determination part 11b Shutter control part 12,13 Closed Valve 20 Indoor unit 21 Bottom frame 22 Front grille 22a Upper air outlet 22b Lower air outlet 22c Opening portion 23 Front panel 23a Upper air inlet 23b Lower air inlet 23c Side air inlet 24 Flap 25 Filter 26 Motor 27 Bell mouth 30 Shutter 31 Shutter drive

Claims (2)

A floor-standing air conditioner, a fan for blowing air, a plurality of outlets for blowing out air for air conditioning from the fan, and a shutter for opening and closing at least one of the plurality of outlets A shutter drive unit that drives the shutter, a fan control unit that controls the rotation speed of the fan, and a shutter control unit that controls the shutter drive unit, and when the operation of the air conditioner is stopped, all the shutters are When in the closed position, the shutter drive unit controls the shutter drive unit so that the opening operation is performed after the inertial rotation of the indoor fan is stopped .
The air conditioner according to claim 1, wherein the plurality of air outlets are at least an upper air outlet and a lower air outlet, and the shutter opens and closes the lower air outlet. .