JP2009186041A - Multi-chamber type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-chamber type air conditioner capable of reducing a draft feeling when the operation of a compressor is stopped. <P>SOLUTION: The multi-chamber type air conditioner comprises the compressor (not shown), an outdoor unit (not shown) having an outdoor heat exchanger (not shown) and an expansion valve (not shown), and a plurality of indoor units 20 connected by pipes to the outdoor unit. The indoor unit 20 is equipped with an indoor fan 8, an indoor heat exchanger 5, an upper blowout port 22a from which air heat-exchanged by the indoor heat exchanger 5 is blown out, a lower blowout port 22b (called "blowout port" hereinbelow), a shutter 30 for opening and closing at least one blowout port, and a shutter drive part (not shown) for driving the shutter 30. The multi-chamber type air conditioner operates the shutter 30 to fully close for a certain amount of time and then to open when the compressor 1 is stopped. When the compressor 1 is stopped, the draft feeling is reduced by closing at least one blowout port by the shutter 30, and after a certain passage of time, by opening the shutter 30, even when biting of foreign matter occurs, it can be easily taken out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a multi-room air conditioner.

  In this type of conventional multi-room air conditioner, the outlet is closed when the operation is stopped. Since such prior art is not a known invention, there is no prior art document to be described.

  However, in the configuration of the conventional multi-room air conditioner, when the multi-room air conditioner is placed on the floor, it cannot be taken out when foreign matter enters the air outlet, and if the air outlet remains open, the multi-room type When the air conditioner is stopped, there is a problem that the user of the living space can easily feel the draft feeling.

  An object of the present invention is to solve the above-mentioned conventional problems, and to provide a multi-chamber air conditioner that can open and close the outlet when the compressor is stopped and reduce the draft feeling.

  In order to solve the above conventional problems, a multi-room air conditioner of the present invention is connected to an outdoor unit having a compressor, an outdoor heat exchanger, a four-way valve, and an expansion valve, and is connected to the outdoor unit by piping. The indoor unit includes an indoor fan, an indoor heat exchanger, a plurality of air outlets through which air exchanged by the indoor heat exchanger blows, and at least one of the plurality of air outlets. A shutter that opens and closes the shutter, and a shutter drive unit that drives the shutter. When the compressor is stopped, the shutter is fully closed for a certain period of time and then opened. When a wind is blown from a plurality of air outlets, the draft feeling can be reduced by closing at least one of the air outlets with a shutter. Also, by controlling the shutter drive unit after a certain period of time and opening the shutter, even if a foreign object is caught, the shutter is open and can be taken out. The draft feeling can be reduced by opening the shutter.

  The multi-room type air conditioner of the present invention prevents a draft feeling by closing at least one of the plurality of outlets with a shutter after the compressor stops regardless of the operation state of the indoor unit, and after a certain time has elapsed. By opening the shutter, even if a foreign object is caught, the shutter is open so that it can be easily removed.

A first invention includes an outdoor unit having a compressor, an outdoor heat exchanger, a four-way valve, and an expansion valve, and a plurality of indoor units connected to the outdoor unit by piping. The indoor unit includes an indoor fan An indoor heat exchanger, a plurality of air outlets through which air heat-exchanged in the indoor heat exchanger blows out, a shutter that opens and closes at least one of the plurality of air outlets, and a shutter drive unit that drives the shutter When the operation of the compressor is stopped, the shutter is fully closed for a certain time and then opened.When the compressor is stopped, when the wind is blown from a plurality of outlets, The draft feeling can be reduced by closing at least one of the plurality of outlets. Also, by controlling the shutter drive unit after a certain period of time and opening the shutter, even if a foreign object is caught, the shutter is open and can be taken out. The draft feeling can be reduced by opening the shutter.

  In particular, the second invention provides at least an upper air outlet on the upper side of the indoor unit and a lower air outlet on the lower side of the indoor unit as the air outlet of the first invention. Open and close the outlet, and when the operation is stopped, open the lower outlet with a shutter so that even if foreign matter such as coins or buttons is inserted from the upper outlet, it can be easily removed from the lower outlet. . In addition, even if the operation is stopped when it is in the vicinity of the indoor unit 20 that is used on the floor, the fan rotates by inertial rotation, so if you stop the operation and open the shutter at the immediate lower outlet, you will feel a sense of wind speed. However, when the shutter of the lower air outlet is opened after a certain period of time, the fan is almost stopped, and the draft feeling from the lower air outlet can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a circuit diagram of a refrigerant circuit of a multi-room air conditioner according to the first embodiment of the present invention, FIG. 2 is a perspective view of the indoor unit of the multi-room air conditioner, and FIG. Sectional drawing of the indoor unit of an air conditioner, FIG. 4 is a flowchart explaining operation | movement of the control apparatus of the multi-room air conditioner.

  1 and 2, the multi-room air conditioner according to the present embodiment includes a single outdoor unit 10 and a plurality of indoor units 20 connected to the outdoor unit 10 (only one unit is shown in FIG. 1). The outdoor unit 10 includes a compressor 1, a four-way valve 2 having the discharge side of the compressor 1 connected to one end, and an outdoor heat exchanger having one end connected to the other end of the four-way valve 2. 3, an electric expansion valve 4 having one end connected to the other end of the outdoor heat exchanger 3, an accumulator 6 connected to the suction side of the compressor 1, and the outdoor heat exchanger 3. An outdoor fan 7 is provided.

  Each indoor unit 20 includes an indoor heat exchanger 5, an indoor fan 8 disposed in the vicinity of the indoor heat exchanger 5, a temperature sensor 9 that detects the temperature of the indoor heat exchanger 5, and a shutter 30 (shown in FIG. 3). The expansion valve 4 is connected to one end of the indoor heat exchanger 5 via the closing valve 12, and the other end of the indoor heat exchanger 5 is connected to the closing valve 13, four-way One end of the accumulator 6 connected to the suction side of the compressor 1 is connected via the valve 2.

  The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the expansion valve 4, the indoor heat exchanger 5, and the accumulator 6 constitute a refrigerant circuit.

  Further, the multi-room air conditioner is based on the temperature of the indoor heat exchanger 5 detected by the temperature sensor 9, the compressor 1, the expansion valve 4, the outdoor fan 7, the indoor fan 8, and the shutter driving unit 31. And the like.

  The control device 11 includes a microcomputer (not shown), an input / output circuit (not shown), and the like, and includes a shutter control unit 11a as an example of a control unit that controls the shutter drive unit 31.

  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 ( 3 and a front panel 23 attached to cover the opening 22c (shown in FIG. 3) of the front grill 22.

An upper suction port 23a is provided in the upper part of the front panel 23, a lower suction port 23b is provided in the lower part, and side suction ports 23c are provided in both side surfaces.

  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.

  Further, as shown in FIG. 3, the motor 26 is fixed substantially at the center of the bottom frame 21. The indoor fan 8 connected to the shaft of the motor 26 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 front side of the indoor fan 8 of the bottom frame 21. The indoor heat exchanger 5 is arranged on the front side of the bell mouth 27, a front grill 22 is attached to the front side of the indoor heat exchanger 5, and a front panel 23 is attached to the front side of the front grill 22. It is attached. A filter 25 is attached to the opening 22c of the front grill 22. A drain pan 28 that receives condensed water falling from the indoor heat exchanger 5 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 drive unit 31 (shown in FIG. 1). A shown by a one-dot chain line is in a fully open state, and B is fully open. Closed.

  In the multi-room air conditioner according to the present embodiment configured as described above, when the compressor 1 is started by switching the four-way valve 2 to the solid line switching position during heating operation, the compressor 1 discharges. The high-pressure refrigerant thus made passes through the four-way valve 2 and enters the indoor heat exchanger 5. The refrigerant condensed in the indoor heat exchanger 5 enters the outdoor heat exchanger 3 after being decompressed by the 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 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 expansion valve 4, the outdoor heat exchanger 3 and the accumulator 6, thereby executing a refrigeration cycle. The indoor fan 8 sucks indoor air from the upper and lower suction ports 23a and 23b and the side suction ports 23c of the front panel 23 and exchanges heat with the indoor heat exchanger 5. By blowing out from the upper and lower outlets 22a, 22b, the room air is circulated and the room is heated.

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

  Next, the operation when the operation of the control device 11 of the multi-room air conditioner is stopped will be described according to the flowchart of FIG.

  First, when the processing at the time of stopping the operation of the multi-room air conditioner is started by a remote controller (not shown) or the like, in step S1, it is determined whether the outlet setting is the two-way blow control or the one blow control. If the outlet setting is one-sided blow control, the process proceeds to step S2. If the outlet setting is two-way blown control, the process proceeds to step S2 after the one-sided blow control process.

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 operation control is such that the air outlet 22b is closed by the shutter 30 and the wind is blown out only from one of the upper air outlets 22a.

  Next, in step S2, if the time since the operation of the multi-room air conditioner was stopped with a remote controller or the like is less than T1, the process returns to step S2, and if it is T1 or more, the shutter controller 11a causes the shutter 30 to be released. Is opened (S3), and the operation of the multi-room air conditioner is stopped (S4).

  As a result, when the compressor 1 is stopped due to processing from multiple chambers, the shutter 30 is moved before the blowout temperature is lowered by setting the one blow operation in the operation state of the compressor 1 instead of the piping temperature in the room. Since it can be closed, the draft feeling can be effectively reduced.

  In addition, when the user stops the operation with a remote controller or the like during the one-way operation, the draft feeling is effectively prevented by opening the shutter 30 and preventing the wind from being emitted even though the indoor fan 8 is rotating by inertia. Can be reduced. Further, by opening the shutter 30 when the operation is stopped, when foreign matter or the like enters from the upper air outlet 22a, it can be easily taken out 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, the present invention may be applied to an air conditioner having another configuration.

  As described above, the multi-room air conditioner according to the present invention prevents a draft feeling by closing at least one of the plurality of outlets with a shutter after the compressor stops regardless of the operation state of the indoor unit. And even if a foreign object is caught by opening the shutter after a certain period of time, it can be easily taken out and can be applied to various air conditioners.

Circuit diagram of refrigerant circuit of multi-room air conditioner according to Embodiment 1 of the present invention Perspective view of the indoor unit of the multi-room air conditioner Sectional view of the indoor unit of the multi-room air conditioner Flowchart for explaining the operation of the control device for the multi-room air conditioner

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 4 Expansion valve 5 Indoor heat exchanger 6 Accumulator 7 Outdoor fan 8 Indoor fan 9 Temperature sensor 10 Outdoor unit 11 Control apparatus 11a Shutter control part 12, 13 Closing valve 20 Indoor unit 21 Bottom frame 22 Front grille 22a Upper air outlet (air outlet)
22b Lower air outlet (air outlet)
22c opening 23 front panel 23a upper suction port 23b lower suction port 23c side suction port 24 flap 25 filter 26 motor 27 bell mouth 30 shutter 31 shutter drive unit

Claims (2)

An outdoor unit having a compressor, an outdoor heat exchanger, a four-way valve, and an expansion valve, and a plurality of indoor units connected by piping to the outdoor unit, the indoor unit including an indoor fan and an indoor heat exchanger A plurality of outlets through which air exchanged by the indoor heat exchanger blows out, a shutter that opens and closes at least one of the plurality of outlets, and a shutter drive unit that drives the shutter, and the compression A multi-room air conditioner characterized in that when the operation of the machine is stopped, the shutter is fully closed for a certain period of time and then opened. A multi-chamber air characterized in that, as the air outlet, at least an upper air outlet is provided above the indoor unit, a lower air outlet is provided below the indoor unit, and the lower air outlet is opened and closed with a shutter. Harmony machine.