JP4240115B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner having a filter cleaning operation function.

An air conditioner is usually provided with a filter that removes dust from air taken in from the room. However, if dust adheres to and accumulates on this filter, ventilation resistance increases. For this reason, various air conditioners having an automatic filter cleaning function have been proposed. One of them is a method of moving dust and cleaning dust adhering to the filter (see Patent Document 1).
JP 2006-194562 A

  In the above system, the filter moves from its original position during the filter cleaning operation. Therefore, if the temperature adjustment operation is performed in this state, the air taken from the room flows without passing through the filter. There is a risk. In this case, dust may adhere to the heat exchanger or the like, which may cause the heat exchanger or the like to become dirty. For this reason, it is desirable not to perform the filter cleaning operation during the temperature adjustment operation.

  On the other hand, some air conditioners include a ventilation unit that performs a ventilation operation that takes in outdoor air and blows it out indoors, in addition to the temperature adjustment unit that performs the temperature adjustment operation. In such an air conditioner, the air taken in from the outside by the ventilation section is also removed from the dust by passing through the filter.

  However, in such an air conditioner, even if the filter cleaning operation is not performed during the temperature adjustment operation, the filter cleaning operation is performed during the ventilation operation, and the air taken from outside does not pass through the filter. There is a risk of flowing.

  The subject of this invention is providing the air conditioner which can prevent that air flows without passing a filter by filter cleaning driving | operation.

The air conditioner according to the first aspect of the present invention includes a temperature adjusting unit, a ventilation unit, a filter, a filter cleaning unit, and a control unit. The temperature adjustment unit takes in indoor air, adjusts the temperature, and blows it out into the room. The ventilation unit takes in outdoor air and blows it out into the room. The filter removes dust from the air taken in from the room and the outside. The filter cleaning unit moves the filter to clean the dust attached to the filter. The control unit determines whether the temperature adjustment operation by the temperature adjustment unit is being executed, and whether the ventilation operation by the ventilation unit is being executed, while the temperature adjustment operation by the temperature adjustment unit is being executed. When a predetermined filter cleaning operation start condition is satisfied, the filter cleaning operation is not performed by the filter cleaning unit, the temperature adjustment operation is stopped, and the filter cleaning operation start condition is performed while the ventilation operation is performed by the ventilation unit. Is satisfied, the ventilation operation is temporarily stopped and then the filter cleaning operation is started. After the filter cleaning operation is completed, the ventilation operation is resumed.

  In this air conditioner, when the temperature adjustment operation is stopped and the predetermined filter cleaning operation start condition is satisfied during the ventilation operation, the ventilation operation is temporarily stopped and the filter cleaning operation is performed. Resume ventilation after completion of cleaning operation. For this reason, the filter cleaning operation can be performed even when the ventilation operation is continuously performed as in the normal ventilation operation. Further, during the temperature adjustment operation, the filter cleaning operation by the filter cleaning unit is prohibited. For this reason, it can prevent that air flows without passing a filter by filter cleaning driving | operation.

  An air conditioner according to a second aspect of the present invention is the air conditioner of the first aspect, wherein the display unit displays that the ventilation operation is stopped while the ventilation operation is stopped for the filter cleaning operation. Is further provided.

  In this air conditioner, the display unit displays that the ventilation operation is being stopped. For this reason, the user can easily grasp that the ventilation operation is stopped.

  An air conditioner according to a third aspect of the present invention is the air conditioner according to the first aspect of the present invention or the second aspect of the present invention, wherein the temperature adjuster is a flow of air blown into the room after being taken in from the room and adjusted in temperature. A first blower that generates The ventilator has a second blower that generates a flow of air that is taken in from outside and blown into the room. The control unit does not execute the filter cleaning operation by the filter cleaning unit while the first blower is being driven and the second blower is being driven.

  In this air conditioner, the filter cleaning operation is prohibited during the driving of the first blower and the second blower. For this reason, it is possible to prevent air from flowing without passing through the filter by the filter cleaning operation not only during the temperature adjustment operation but also during the ventilation operation.

  An air conditioner according to a fourth aspect of the present invention is the air conditioner according to any one of the first to third aspects of the present invention, wherein the filter cleaning operation start condition is that the cumulative operating time of the operation of the air conditioner has reached a predetermined time. That is.

  An air conditioner according to a fifth aspect of the present invention is the air conditioner according to any one of the first to fourth aspects, further comprising a remote controller for instructing a filter cleaning operation. The filter cleaning operation start condition is that the filter cleaning operation is instructed from the remote controller.

  In the air conditioner according to the first aspect of the present invention, when the temperature adjustment operation is stopped and the predetermined filter cleaning operation start condition is satisfied while the ventilation operation is being executed, the ventilation operation is temporarily stopped to perform the filter cleaning operation. And the ventilation operation is resumed after the filter cleaning operation is completed. For this reason, the filter cleaning operation can be performed even when the ventilation operation is continuously performed as in the normal ventilation operation. Further, during the temperature adjustment operation, the filter cleaning operation by the filter cleaning unit is prohibited. For this reason, it can prevent that air flows without passing a filter by filter cleaning driving | operation.

  In the air conditioner according to the second aspect of the invention, the display unit displays that the ventilation operation is being stopped. For this reason, the user can easily grasp that the ventilation operation is stopped.

  In the air conditioner according to the third aspect of the invention, the filter cleaning operation is prohibited during the driving of the first blower and the second blower. For this reason, it is possible to prevent air from flowing without passing through the filter by the filter cleaning operation not only during the temperature adjustment operation but also during the ventilation operation.

<Configuration>
[Schematic configuration of air conditioner]
The external appearance of the air conditioner 1 which concerns on 1st Embodiment of this invention is shown in FIG.

  The air conditioner 1 is configured by being divided into an indoor unit 2 installed indoors and an outdoor unit 3 installed outdoor, and can perform indoor cooling and heating.

  The outdoor unit 3 includes an outdoor air conditioning unit 5 and a humidity control unit 4 placed on the outdoor air conditioning unit 5. As will be described later, the humidity control unit 4 can supply outdoor air to the room and exhaust indoor air to the outside. Between the outdoor unit 3 and the indoor unit 2, humidity control is possible. A supply / exhaust hose 6 used when supplying outdoor air, humidity control air, or the like from the unit 4 to the indoor unit 2 side or exhausting indoor air to the outside is provided.

[Humidity control unit 4]
The humidity control unit 4 can perform an exhaust operation for discharging air taken in from the room to the outside and an air supply operation for supplying air taken in from the room to the room. The air supply operation includes a humidification operation in which air taken from outside is humidified and supplied to the room, and an air supply and ventilation operation in which air taken from outside is supplied to the room without being humidified. . That is, the humidity control unit 4 can function as a ventilation unit that takes in outdoor air and blows it out into the room. As shown in FIGS. 2 and 3, the humidity control unit 4 includes a humidity control unit casing 7, a humidifying / humidifying member 51, a heating device 52, a switching damper 53, a second blower 54, an adsorption blower 55, and the like. Yes. 2 is an exploded perspective view of the outdoor unit 3. FIG. 3 is a system diagram of the refrigerant circuit provided in the air conditioner 1. The air supplied to the room and the air discharged to the outside are shown in FIG. An air passage is schematically added.

<Humidity control unit casing 7>
The humidity control unit casing 7 accommodates a moisture absorbing / humidifying member 51, a heating device 52, a second blower 54, a switching damper 53, a suction blower 55, and the like.

  On the front surface of the humidity control unit casing 7, there are provided air suction ports 7 a for adsorption composed of a plurality of slit-shaped openings. On the back surface of the humidity control unit casing 7, an adsorption air suction port 7 b and a supply / exhaust port 7 c are provided. The air suction port 7b for adsorption is an opening through which air taken in from the outdoor in order to cause the moisture humidifying member 51 to adsorb moisture. Since the air supply / exhaust port 7c is sent to the indoor unit 2 during the air supply operation, air taken into the humidity control unit 4 from the outside passes through, and during the exhaust operation, the air supply / exhaust port 7c is taken in from the indoor unit 2 to the outdoor from the humidity control unit 4 And the opening through which the exhausted air passes. The upper part of the humidity control unit casing 7 is covered with a top plate 56.

<Sucking and humidifying member 51>
The humidifying / humidifying member 51 is a ceramic rotor having a honeycomb structure, and has a substantially disk-shaped outer shape. The humidifying / humidifying member 51 is rotatably provided and is rotationally driven by a rotor drive motor 57 (see FIG. 6). The adsorbing and humidifying member 51 carries an adsorbent such as zeolite, silica gel, or alumina. This adsorbent such as zeolite can adsorb moisture in the air in contact with it and has the property of releasing moisture when heated.

<Heating device 52>
The heating device 52 is located above the moisture absorbing / humidifying member 51 and is disposed to face the moisture absorbing / humidifying member 51. The heating device 52 can heat the air absorbing / humidifying member 51 by heating the air sent to the air absorbing / humidifying member 51.

<Second blower 54>
The second air blower 54 is a radial fan assembly that is disposed on the side of the humidifying / humidifying member 51 and generates a flow of air that is taken in from outside and sent to the indoor unit 2. The second air blower 54 generates a flow of air from the air supply / exhaust port 7 c to the room through the moisture absorbing / humidifying member 51 and the switching damper 53, and sends the air taken from the outside to the indoor unit 2. Moreover, the 2nd air blower 54 can also discharge the air taken in from the indoor unit 2 to the outdoor side. The second blower 54 switches these operations when the switching damper 53 is switched. As shown in FIG. 3, the second air blower 54 switches the air that has passed through the portion of the humidifying / humidifying member 51 that faces the heating device 52 when sending air taken from outside to the indoor unit 2. It is sent out to the air supply / exhaust duct 58 through the damper 53. The air supply / exhaust duct 58 is connected to the air supply / exhaust hose 6, and the second blower 54 supplies air to the indoor unit 2 via the air supply / exhaust duct 58 and the air supply / exhaust hose 6 (see solid arrow A <b> 1). ). In addition, the air sent to the indoor unit 2 through the air supply / exhaust hose 6 is blown out to the upstream side of the filter 21 described later inside the indoor unit 2. Further, when the second air blower 54 discharges the indoor air taken in from the indoor unit 2 to the outside of the room, the second blower 54 passes the air sent from the air supply / exhaust duct 58 through the air supply / exhaust hose 6 from the air supply / exhaust port 7c. It discharges | emits outdoors (refer broken line arrow A2).

<Switching damper 53>
The switching damper 53 is a rotary air flow path switching unit disposed below the second blower 54. The switching damper 53 is switched to the first switching state, the second switching state, and the third switching state.

  In the first switching state, the air blown out from the second blower 54 is supplied to the indoor unit 2 through the supply / exhaust duct 58 and the supply / exhaust hose 6. Thereby, in the first switching state, air flows in the direction of the arrow indicated by the solid line arrow A1 in FIG. 3, and the outdoor air is supplied to the indoor unit 2 through the air supply / exhaust hose 6 without being humidified or humidified. .

  In the second switching state, air flows in the direction of the arrow indicated by the broken line arrow A2 in FIG. 3, and the air that has passed through the air supply / exhaust hose 6 and the air supply / exhaust duct 58 from the indoor unit 2 is supplied / exhausted from the second blower 54. The air is exhausted through the opening 7c.

  In the third switching state, the path connecting the switching damper 53 and the air supply / exhaust duct 58 is closed, and the air flow between the indoor unit 2 and the indoor unit 2 is blocked.

<Adsorption air blower 55>
The suction blower 55 includes an suction fan motor 59 and a suction fan 61 that is rotationally driven by the suction fan motor 59, and passes through a portion of the suction / humidification member 51 that does not face the heating device 52. (See solid arrow A3). That is, the suction air blowing device 55 is sucked from the suction air suction port 7b, passes through a portion of the suction / humidification member 51 that does not face the heating device 52, passes through the opening of the bell mouth 62, and passes through the opening of the bell mouth 62. It generates a flow of air that is exhausted from the room to the outside.

[Outdoor air conditioning unit 5]
As shown in FIG. 3, the outdoor air conditioning unit 5 includes a compressor 63, a four-way switching valve 64 connected to the discharge side of the compressor 63, an accumulator 65 connected to the suction side of the compressor 63, An outdoor heat exchanger 66 connected to the four-way switching valve 64 and an expansion valve 67 connected to the outdoor heat exchanger 66 are provided. The expansion valve 67 is connected to one end of the indoor heat exchanger 12 via a refrigerant pipe. The four-way switching valve 64 is connected to the other end of the indoor heat exchanger 12 via a refrigerant pipe.

  Further, in the outdoor air conditioning unit 5, a propeller fan 68 for discharging the air after heat exchange in the outdoor heat exchanger 66 to the outside, an outdoor fan motor 69 for rotating the propeller fan 68, an electrical component unit 73, etc. Also arranged.

[Indoor unit 2]
The indoor unit 2 is a wall-mounted indoor unit that is attached to a wall surface of a room. As shown in FIGS. 4 and 5, the main unit 10, the filter unit 20, the front grill 50, the front panel 60, and the dust box. 70. 4 is an exploded perspective view of the indoor unit 2, and FIG. 5 is a longitudinal sectional view thereof.

<Main unit 10>
The main unit 10 includes a bottom frame 11, an indoor heat exchanger 12, a first blower 16 (see FIG. 6), an electrical component unit 14, and the like.

  An indoor heat exchanger 12, a first blower 16, an electrical component unit 14 and the like are attached to the bottom frame 11. Further, a blowout port 15 is provided at the lower front surface of the bottom frame 11, and a horizontal flap 17 for guiding the air blown out from the blowout port 15 is provided. The horizontal flap 17 is rotationally driven by a flap motor 18 (see FIG. 6), and can change the air guiding direction and open and close the outlet 15.

  The indoor heat exchanger 12 is configured by a plurality of fins and a heat transfer tube through which a refrigerant flows, and performs heat exchange with air passing therethrough.

  The first blower 16 generates a flow of air that is taken in from the room and is blown into the room after the temperature is adjusted by the indoor heat exchanger 12. The first blower 16 includes a first blower fan 13 and an indoor fan motor 19. The first blower fan 13 is a cross flow fan and is driven to rotate by the indoor fan motor 19.

  In addition, the 1st ventilation apparatus 16 and the indoor heat exchanger 12 comprise the temperature adjustment part 22 (refer FIG. 6) which takes in indoor air, adjusts temperature, and blows it out indoors.

<Filter unit 20>
The filter unit 20 is attached to the bottom frame 11 of the main unit 10 and includes a filter 21. The filter 21 is disposed on the front side (windward side) of the indoor heat exchanger 12 and removes dust from the air taken in from the room and the outdoors. As a result, the filter 21 prevents dust floating in the air from contaminating the indoor heat exchanger 12. Further, the filter unit 20 includes a winding mechanism 30 that moves the filter 21 downward and a winding motor 26 (see FIG. 6) in order to perform cleaning for removing dust attached to the filter 21. In addition, the filter 21 is arrange | positioned so that the substantially whole area of the windward side of the indoor heat exchanger 12 may be covered in the state which is not wound up by the winding mechanism 30 (refer FIG. 5).

  As shown in FIG. 5, the winding mechanism 30 is disposed on the downstream side of the air flow with respect to the filter 21, and includes a pair of upper and lower pulleys 31 and 32, and an annular belt 33 wound between the pulleys 31 and 32. And a guide member 42. The lower pulley 31 circulates the annular belt 33 by being driven to rotate by the winding motor 26. The guide member 42 is urged downward and presses the annular belt 33 above the pulley 32.

<Front grill 50 and front panel 60>
As shown in FIG. 4, the front grill 50 is attached to the filter unit 20 so as to cover the filter unit 20, and an upper suction port 75 is provided on the top surface of the front grill 50. A front panel 60 that covers the front surface of the front grille 50 is attached to the front grille 50, and the front suction port 76 formed on the front surface of the front grille 50 can be opened and closed by rotating the front panel 60. it can.

  Further, the front grill 50 is provided with a display unit 77 (see FIGS. 1 and 6) for displaying the operation status of the indoor unit 2. The display unit 77 is provided so as to be visible from the front of the indoor unit 2. The display unit 77 is composed of a plurality of LEDs, and displays the operation status of the indoor unit 2 with or without lighting.

<Dust box 70>
The dust box 70 has a function of cleaning the filter 21. The dust box 70 is attached to the lower portion of the front panel 60 at the upper position of the outlet 15 of the main unit 10. The dust box 70 is detachable from the outside without interfering with the front panel 60 in a state where the front panel 60 is closed. Further, the dust box 70 is provided with a rotating brush 71, and the rotating brush 71 comes into pressure contact with the filter 21 moving to this portion from the lower side of the filter unit 20. And at the time of cleaning, it is rotationally driven by the brush motor 78 (refer FIG. 6). The rotary brush 71, brush motor 78, winding mechanism 30 and winding motor 26 constitute a filter cleaning unit 79 (see FIG. 6) that moves the filter 21 to clean dust adhering to the filter 21. .

[Control unit 80]
The control unit 80 shown in FIG. 6 is provided separately for the electrical component unit 14 of the indoor unit 2 and the electrical component unit 73 of the outdoor unit 3, and provides instructions from the remote controller 81 and various sensors (not shown). Based on the information from the above, various controls such as temperature adjustment operation, humidification operation, air supply ventilation operation, exhaust operation, and filter cleaning operation can be performed.

  Hereinafter, the operation during each air conditioning operation will be described.

<Operation during each air conditioning operation>
[Operation during temperature adjustment operation]
During the temperature adjustment operation, the compressor 63 is driven and the expansion valve 67 is throttled to a predetermined opening, whereby the refrigerant circulates through the refrigerant circuit and the indoor heat exchanger 12 functions as an evaporator or a condenser. . Further, when the first blower fan 13 is driven, the air is sucked into the indoor unit 2 from the upper suction port 75 and the front suction port 76, passes through the indoor heat exchanger 12, and is blown into the room from the blowout port 15. A flow of air is generated. Thereby, indoor cooling or heating can be performed.

  During the temperature adjustment operation, the front panel 60 is opened at a predetermined opening, and the horizontal flap 17 is also opened. The same applies to the humidifying operation, the air supply ventilation operation, and the exhaust operation.

[Operation during humidification operation]
During the humidifying operation, the switching damper 53 is switched to the first switching state, and the second blower 54 and the suction fan motor 59 are driven. Further, the heating device 52 is energized.

  When the suction fan motor 59 is driven, outdoor air is taken into the humidity control unit 4 and discharged outside (see solid line arrow A3 in FIG. 2). That is, the air from the outside is taken into the humidity control unit casing 7 through the adsorption air suction port 7b. The air that has entered the humidity control unit casing 7 passes through a position of the moisture absorbing / humidifying member 51 that does not face the heating device 52. At this time, the moisture absorption / humidification member 51 adsorbs moisture from the air passing through the adsorption position of the moisture absorption / humidification member 51. The air that has passed through the humidifying / humidifying member 51 is folded downward and discharged from the adsorption air outlet 7a to the outside of the outdoor unit 3.

  On the other hand, when the second blower 54 is driven, outdoor air is taken into the humidity control unit 4 and supplied to the room through the air supply / exhaust hose 6 and the indoor unit 2 (solid arrow A1 in FIG. 2). reference). That is, outdoor air is taken into the humidity control unit casing 7 from the air supply / exhaust port 7c, passes through the moisture absorbing / humidifying member 51 from below to above and heated by the heating device 52, and then passes through the moisture absorbing / humidifying member 51. Pass from above to below. At this time, the moisture adsorbed by the moisture absorbing / humidifying member 51 is excited and separated from the moisture absorbing / humidifying member 51 into the air. The air that has passed through the humidifying / humidifying member 51 passes through the switching damper 53 and the second blower 54 and is sent to the supply / exhaust hose 6. The air sent to the air supply / exhaust hose 6 is sent to the inside of the indoor unit 2. The air sent into the indoor unit 2 passes through the filter 21 and the indoor heat exchanger 12, and is blown out into the room from the blowout port 15. The air sent to the indoor unit 2 contains the moisture adsorbed by the moisture absorbing / humidifying member 51, whereby the room is humidified.

  In addition, the moisture absorption / humidification member 51 is rotationally driven by the rotor drive motor 57, and moisture adsorption and separation are repeated. Thereby, indoor humidification with no water supply is possible.

[Operation during supply air ventilation operation]
When the air supply and ventilation operation is performed, the suction fan motor 59 is not operated, and the heating device 52 is not energized, and the same operation as the humidification operation is performed. Thereby, the air taken in from the outside is sent to the indoor unit 2 through the same route as described above without being humidified.

[Operation during exhaust operation]
During the exhaust operation, the switching damper 53 is switched to the second switching state, and the second blower 54 is driven. The suction fan motor 59 is not driven, and the heating device 52 is not energized.

  When the second blower 54 is driven, the indoor air taken in from the indoor unit 2 is taken into the humidity control unit 4 via the air supply / exhaust hose 6 and flows in the direction opposite to that during the humidification operation. As a result, it is discharged to the outside (see the wavy arrow A2 in FIG. 2). That is, the air taken into the humidity control unit 4 from the air supply / exhaust duct 58 passes through the switching damper 53 and the second blower 54, passes through the suction / humidification member 51 from below, and passes through the heating device 52. Later, the air passes through the suction / humidification member 51 from the upper side to the lower side, and is discharged from the air supply / exhaust port 7c to the outside.

[Operation during filter cleaning operation]
During the temperature adjustment operation, the humidification operation, the air supply ventilation operation, and the exhaust operation, the operation is performed with the filter 21 positioned at the normal position shown in FIG. When such an operation is performed, dust adheres to the filter 21. Therefore, when a predetermined condition is satisfied, a filter cleaning operation that automatically removes the dust attached to the filter 21 is performed. Hereinafter, the operation during this filter cleaning operation will be described with reference to FIGS. 5 and 7. For convenience of explanation, in the state shown in FIG. 5 (state during normal operation), the lower portion of the filter 21 is called a winding start end portion, and the upper tip portion of the filter 21 is called a winding end portion.

  First, the control unit 80 drives the winding motor 26 from the state shown in FIG. 5 to move the annular belt 33 and rotationally drive the rotating brush 71 of the dust box 70. Then, the filter 21 is lowered together with the annular belt 33, and the winding start end portion is raised on the back surface side through the periphery of the lower pulley 31. At this time, the rotating brush 71 rotates in the opposite direction to the lower pulley 31 and scrapes off dust on the surface of the filter 21. Then, before the winding start end portion reaches the position of the guide member 42, the winding end portion is wound around the annular belt 33. When the winding start end reaches the position of the guide member 42, the guide member 42 is pushed up, passes below the guide member 42, and then descends together with the annular belt 33 (see FIG. 7). In this state, the guide member 42 is in press contact with the surface of the filter 21. When the winding end portion comes into contact with the rotating brush 71 and the cleaning of this portion is completed, the movement of the annular belt 33 and the rotation driving of the rotating brush 71 are stopped, and the forward cleaning operation is finished.

  Next, the return path operation is performed. At this time, the moving direction of the annular belt 33 and the rotating direction of the rotating brush 71 are reversed from those in the forward path, and the rotating brush 71 remains stopped. In this case, due to the movement of the annular belt 33, the winding start end portion passes through the position of the guide member 42, and the guide member 42 comes into a state of pressing and contacting the surface of the annular belt 33. Next, the winding end portion is detached from the annular belt 33. This is because the annular belt 33 is curved toward the back side by the upper pulley 32, but the filter 21 tries to maintain an upright state by its own rigidity, so the distance between the two gradually increases. As a result, the filter 21 is separated from the surface of the annular belt 33. At this time, even if the winding end portion is not completely detached from the annular belt 33 and the winding end portion tries to follow the curvature of the annular belt 33, the guide member 42 is pressed against the surface of the annular belt 33. Therefore, a peeling force in the direction of peeling the guide member 42 from the annular belt 33 acts on the winding end portion, so that the winding end portion is reliably detached from the annular belt 33. To do. When the filter 21 returns to the normal use position shown in FIG. 5, the return path operation is completed.

  During the filter cleaning operation, both the front panel 60 and the horizontal flap 17 are closed.

[Determination of filter cleaning operation execution]
In this air conditioner 1, the control unit 80 starts the filter cleaning operation when a predetermined filter cleaning operation start condition is satisfied. The predetermined filter cleaning operation start condition is that the filter cleaning operation is instructed by the remote controller 81 or that the accumulated movable time such as the temperature adjustment operation, the humidification operation, and the air supply ventilation operation has reached a predetermined time. However, even when these filter cleaning operation start conditions are satisfied, the control unit 80 does not perform any of the temperature adjustment operation, the humidification operation, and the air supply / ventilation operation, but the filter cleaning unit 79. The filter cleaning operation by is not executed. The determination of execution of the filter cleaning operation will be described based on the flow of FIG.

  First, in step S1, it is determined whether or not the automatic cleaning mode is set. The automatic cleaning mode is a control mode in which the filter cleaning operation is automatically executed even when the user does not input an instruction to the remote controller 81, and can be set in advance by the remote controller 81.

  If the automatic cleaning mode is set, it is determined in step S2 whether or not there is a cleaning request. The cleaning request is “present” when the accumulated movable time such as the temperature adjustment operation, the humidification operation, and the air supply ventilation operation reaches a predetermined time.

  On the other hand, if it is determined in step S1 that the automatic cleaning mode is not set, whether or not there is a manual cleaning request in step S3, that is, whether or not a cleaning request is instructed from the remote control 81. To be judged.

  Whether there is a cleaning request in the automatic cleaning mode or a manual cleaning request, whether or not the temperature adjustment operation is being performed prior to the start of the cleaning operation. It is confirmed whether or not the air supply / ventilation operation is being executed (step S4, step S5, and step S6). Here, when any of the temperature adjustment operation, the humidification operation, and the air supply ventilation operation is being executed, the filter cleaning operation is not started. That is, the filter cleaning operation is not started while the first blower 16 is being driven and at least one of the second blowers 54 is being driven.

  When the temperature adjustment operation or the humidification operation is being executed, the filter cleaning operation is executed in step S7 after the temperature adjustment operation or the humidification operation is completed.

  If the air supply ventilation operation is being executed, the air supply ventilation operation is temporarily stopped in step S8, and the filter cleaning operation is started in step S9. Note that while the supply air ventilation operation is stopped for the filter cleaning operation, the display unit 77 displays that the supply air ventilation operation is being stopped. In step S10, it is determined whether or not the filter cleaning operation is completed. If the filter cleaning operation is completed, the air supply and ventilation operation is restarted in step S11.

<Features>
(1)
In the air conditioner 1, the filter cleaning operation is not performed not only during the temperature adjustment operation but also during the humidification operation and the air supply ventilation operation. For this reason, it is prevented that the humidification operation and the air supply ventilation operation are performed in a state where the indoor heat exchanger 12 is not covered by the filter 21. Thereby, increase of the contamination of the indoor heat exchanger 12 by the air which has not permeate | transmitted the filter 21 passing through the indoor heat exchanger 12 can be prevented.

(2)
In this air conditioner 1, when the filter cleaning operation start condition is satisfied during the air supply ventilation operation, the filter cleaning operation is started after the air supply ventilation operation is stopped, and after the filter cleaning operation is completed. Supply air ventilation operation is resumed. For this reason, the filter cleaning operation can be performed even when the supply air ventilation operation is continuously performed as in the case of continuous ventilation.

  Further, when the air supply / ventilation operation is stopped for the filter cleaning operation, that effect is displayed on the display unit 77. For this reason, it is possible to notify the user that the air supply / ventilation operation is not for failure but for the filter cleaning operation.

<Other embodiments>
(1)
As the filter cleaning operation start condition, another condition may be used instead of the above condition, and another condition may be added together with the above condition.

(2)
In the above embodiment, the display unit 77 is composed of a plurality of LEDs, but it may be a liquid crystal screen provided in the indoor unit 2 or the remote controller 81.

(3)
In the above-described embodiment, the wall-mounted indoor unit 2 is used, but another installation type indoor unit may be used.

(4)
In the above embodiment, the filter 21 reciprocates, and the rotating brush 71 is operated during the forward path. However, the operation is not limited to these operation methods as long as dust on the filter 21 is removed. For example, the return path can be cleaned by operating the rotating brush 71, the filter 21 can be partially reciprocated, the filter 21 can be temporarily stopped and cleaned, the rotating direction of the rotating brush 71 can be reversed, It may be operated completely.

(5)
In the above embodiment, the driving method of the filter 21 is a belt-driven reciprocating operation, but other driving methods may be used.

  The present invention has an effect of preventing air from flowing without passing through a filter by a filter cleaning operation, and is useful as an air conditioner.

The external view of an air conditioner. The exploded perspective view of an outdoor unit. The refrigerant circuit diagram of an air conditioner. The exploded perspective view of an indoor unit. Side surface sectional drawing of an indoor unit. The block diagram which shows the structure of an air conditioner. The figure which shows the state of the filter in filter cleaning driving | operation. The flowchart of judgment of filter cleaning operation execution.

Explanation of symbols

1 Air conditioner 4 Humidity control unit (ventilation unit)
16 1st air blower 22 Temperature adjustment part 21 Filter 54 2nd air blower 77 Display part 79 Filter cleaning part 80 Control part

Claims (5)

A temperature adjusting unit (22) for taking in indoor air and adjusting the temperature and blowing it out into the room;
A ventilation section (4) for taking in outdoor air and blowing it out into the room;
A filter (21) for removing dust from air taken in indoors and outdoors;
A filter cleaning unit (79) for moving the filter (21) and cleaning dust adhering to the filter (21);
It is determined whether the temperature adjustment operation by the temperature adjustment unit (22) is being executed and whether the ventilation operation by the ventilation unit (4) is being executed, and the temperature adjustment unit (22) When a predetermined filter cleaning operation start condition is satisfied during execution of the temperature adjustment operation by the filter cleaning operation by the filter cleaning unit (79) is not executed, the temperature adjustment operation is stopped and the When the filter cleaning operation start condition is satisfied during the ventilation operation by the ventilation unit (4), the filter cleaning operation is started after temporarily stopping the ventilation operation, and the filter cleaning operation is started. A control unit (80) for restarting the ventilation operation after completion;
An air conditioner (1) comprising: A display unit (77) for displaying that the ventilation operation is stopped while the ventilation operation is stopped for the filter cleaning operation;
The air conditioner (1) according to claim 1. The temperature adjustment unit (22) includes a first blower (16) that generates a flow of air that is taken in from the room and is blown into the room after the temperature is adjusted,
The ventilation section (4) has a second air blower (54) that generates a flow of air that is taken from outside and blown into the room,
The control unit (80) does not cause the filter cleaning operation by the filter cleaning unit (79) to be executed during the driving of the first blower (16) and the second blower (54).
The air conditioner (1) according to claim 1 or 2. The filter cleaning operation start condition is that the accumulated movable time of the operation of the air conditioner has reached a predetermined time.
The air conditioner (1) according to any one of claims 1 to 3. A remote control (81) for instructing the filter cleaning operation;
The filter cleaning operation start condition is that the filter cleaning operation is instructed from the remote control (81).
The air conditioner (1) according to any one of claims 1 to 4.

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