JP2009299983A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner, hardly giving unpleasantness to a person to be air-conditioned in drying operation. <P>SOLUTION: This air conditioner 100 has an indoor unit 1 housing an indoor fan 6 and an indoor heat exchanger 5 in the interior thereof, wherein at least cooling operation causing the indoor heat exchanger 5 to function as a heat absorber and an interior clean operation for drying the inside of the indoor unit 1 after the cooling operation are performed. The air conditioner includes a normal operation control part 62 for conducting the operation control for cooling operation and an interior clean operation control part 63 for conducting the operation control for interior clean operation. The interior clean operation control part 63 switches the state in the order of a high blowing state which is the state of operating the indoor fan 6 with a predetermined air flow, a low blowing state which is the state of operating the indoor fan 6 with a smaller air flow than the predetermined air blow, and a first heating state which is the state of functioning the indoor heat exchanger 5 as a radiator. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner having a function of drying the interior of an indoor unit.

  Conventionally, when a cooling operation or a dehumidifying operation (hereinafter referred to as a cooling operation) is performed in an air conditioner, it is known that the interior of the indoor unit is in a high temperature and high humidity state, and an environment in which mold and bacteria are likely to propagate is known. .

  Therefore, in recent years, there is an air conditioner in which a drying operation for drying the interior of an indoor unit is performed after the cooling operation is performed.

For example, after the cooling operation is performed, an air conditioning in which a draining operation (blower operation and intermittent heating operation) for removing moisture attached to the indoor heat exchanger is performed, and then a heating operation is performed as a drying operation is performed. (See Patent Document 1). In this air conditioner, moisture in the indoor unit can be removed by performing a draining operation before the drying operation. For this reason, in this air conditioner, the humidity inside the indoor unit can be further reduced. This suppresses the growth of mold and bacteria inside the indoor unit.
JP 11-2111184 A

  By the way, in this air conditioner, air is blown out from the interior of the indoor unit into the room with a weak air volume in the draining operation and the drying operation. For this reason, in the draining operation or the drying operation, there is a possibility that the air-conditioning target person may feel uncomfortable by blowing out air from the indoor unit into the room for a long time.

  Then, the subject of this invention is providing the air conditioner which can make an air conditioning subject difficult to give a discomfort in dry operation.

  An air conditioner according to a first aspect of the present invention has an indoor unit that houses therein a blower and an indoor heat exchanger, the cooling operation for causing the indoor heat exchanger to function as a heat absorber, and the indoor unit after the cooling operation An air conditioner that performs at least a drying operation for drying the inside, and includes a normal operation control unit and a drying operation control unit. The normal operation control unit performs operation control of the cooling operation. The drying operation control unit performs operation control of the drying operation. Moreover, a drying operation control part switches a state in order of a strong ventilation state, a weak ventilation state, and a 1st heating state. The strong air blowing state is a state in which the blower is operated with a predetermined air volume. The weakly blown state is a state where the blower is operated with an air volume smaller than the predetermined air volume. The first heating state is a state in which the indoor heat exchanger functions as a radiator.

  In the air conditioner according to the first aspect, in the drying operation, the states are switched in the order of the strong air blowing state, the weak air blowing state, and the first heating state. In the strong air blowing state, moisture existing inside the indoor unit can be blown off. For this reason, the water | moisture content inside an indoor unit can be removed in a short time.

  Moreover, in the weak ventilation state, the temperature inside the indoor unit can be brought close to the room temperature. Furthermore, in the 1st heating state, the water | moisture content inside the indoor unit which could not be blown off in the strong air blowing state can be removed. For this reason, in the 1st heating state, the rapid rise of the temperature inside an indoor unit can be suppressed. Therefore, generation of steam from the interior of the indoor unit in the first heating state can be suppressed. Furthermore, it is possible to suppress the occurrence of condensation due to the temperature inside the indoor unit dropping again after the drying operation.

  Thereby, it is possible to make it difficult for the air conditioning target person to feel uncomfortable in the drying operation.

  The predetermined air volume here may be an air volume equivalent to the air volume during the cooling operation, or may be an air volume larger than the air volume during the cooling operation.

  An air conditioner according to a second aspect is the air conditioner according to the first aspect, wherein the drying operation control unit stops the operation of the blower and the function of the indoor unit for a first predetermined time before switching to the first heating state. The state is switched to the first stop state. In the first stop state, it is possible to make it easy to drip moisture at a portion where it is difficult to drip moisture in various devices housed inside the indoor unit including the indoor heat exchanger.

  Thereby, the water | moisture content inside an indoor unit can be removed.

  An air conditioner according to a third aspect of the present invention is the air conditioner of the second aspect, wherein the drying operation control unit switches the state in the order of the strong air blowing state, the first stop state, and the weak air blowing state. For this reason, in the 1st stop state, dripping of the water | moisture content inside the indoor unit which could not be blown off in a strong ventilation state can be promoted.

  As a result, moisture inside the indoor unit can be further removed.

  The air conditioner according to a fourth aspect of the present invention is the air conditioner of the third aspect, wherein the drying operation control unit switches the state in the order of the weak air blowing state, the second stopped state, and the first heating state. The second stop state is a state in which the operation of the blower and the function of the indoor heat exchanger are stopped for a second predetermined time.

  In the air conditioner according to the fourth aspect of the invention, the state is switched from the weak air blowing state to the second stopped state and the first heating state. For this reason, dripping of the water | moisture content inside the indoor unit which could not be removed in the strong air blowing state, the first stop state, and the weak air blowing state can be promoted in the second stop state. Moreover, the water | moisture content inside an indoor unit can further be removed in a 1st heating state.

  As a result, moisture inside the indoor unit can be further removed.

  An air conditioner according to a fifth aspect is the air conditioner according to any one of the second to fourth aspects, wherein the drying operation control unit further switches the state from the first heating state to the third stop state. The third stop state is a state in which the operation of the blower and the function of the indoor heat exchanger are stopped for a third predetermined time longer than the first predetermined time.

  In the air conditioner according to the fifth aspect of the invention, the state is switched from the first heating state to the third stop state. For this reason, heat radiation and moisture release are performed for the third predetermined time from the indoor heat exchanger that has become high temperature in the first heating state to the inside of the indoor unit.

  As a result, more water can be desorbed from the indoor heat exchanger.

  The air conditioner according to a sixth aspect of the present invention is the air conditioner according to the fifth aspect of the present invention, wherein the drying operation control unit further switches the state from the third stop state in the order of the first air blowing state and the fourth stop state. The fourth stop state is a state in which the operation of the blower and the function of the indoor heat exchanger are stopped for a fourth predetermined time. For this reason, the water | moisture content inside an indoor unit can further be removed in a 1st ventilation state. In addition, in the fourth stop state, it is possible to further promote the dripping of moisture existing in the indoor unit.

  As a result, moisture inside the indoor unit can be further removed.

  The first air blowing state here may be the same state as the strong air blowing state or the weak air blowing state, or may be a state different from the strong air blowing state or the weak air blowing state.

  An air conditioner according to a seventh aspect is the air conditioner according to the sixth aspect, wherein the drying operation control unit further switches from the fourth stop state to the second heating state. The second heating state is a state where the blower is operated and the indoor heat exchanger functions as a radiator.

  In the air conditioner according to the seventh aspect of the invention, in the drying operation, the air conditioner is switched to the second heating state in which the blower is operated and the indoor heat exchanger functions as a radiator. For this reason, the humidity inside the indoor unit can be drastically lowered.

  Thereby, the growth of mold and bacteria can be efficiently suppressed.

  In the air conditioner according to the first aspect of the present invention, it is possible to make the air conditioning subject less likely to feel uncomfortable during the drying operation.

  In the air conditioner according to the second aspect of the invention, moisture inside the indoor unit can be removed.

  In the air conditioner according to the third aspect of the present invention, moisture inside the indoor unit can be further removed.

  In the air conditioner according to the fourth aspect of the present invention, moisture inside the indoor unit can be further removed.

  In the air conditioner according to the fifth aspect of the invention, more water can be desorbed from the indoor heat exchanger.

  In the air conditioner according to the sixth aspect of the present invention, moisture inside the indoor unit can be further removed.

  In the air conditioner according to the seventh aspect of the present invention, it is possible to efficiently suppress the growth of mold and bacteria.

<Outline of air conditioner>
FIG. 1 shows a schematic refrigerant circuit of an air conditioner 100 according to an embodiment of the present invention. The air conditioner 100 includes an indoor unit 1 and an outdoor unit 20, and performs an internal clean operation (corresponding to a drying operation) in addition to a normal operation including a cooling operation, a dehumidifying operation, and a heating operation. be able to. The internal clean operation is an operation for removing moisture from the indoor fan 6 and the indoor heat exchanger 5 to be described later in order to dry the interior of the indoor unit 1, and blows away moisture adhering to the indoor heat exchanger 5. Or the operation | movement performed by dripping the water | moisture content adhering to the indoor heat exchanger 5, or evaporating the water | moisture content inside the indoor unit 1 is carried out. In the present embodiment, the internal clean operation is for dripping moisture adhering to the indoor heat exchanger 5 and the strong air blowing states F1 and F3 for blowing away the moisture adhering to the indoor heat exchanger 5. Stop states St1, St2, St4, and St5 are combined with a heating state (corresponding to the first heating state) H1 and a dry shock state (corresponding to the second heating state) D1 for evaporating moisture inside the indoor unit 1. Is done by being.

  In the indoor unit 1, an indoor fan 6, an indoor heat exchanger 5 and the like are arranged. In the outdoor unit 20, a compressor 24, an outdoor fan 22, an outdoor heat exchanger 21, a four-way switching valve 23, an expansion valve 25, and the like are accommodated. Furthermore, the air conditioner 100 includes a control unit 60 (see FIG. 4) that controls various devices housed in the indoor unit 1 and the outdoor unit 20, and by controlling these various devices. The above operation can be performed.

  Below, the indoor unit 1 and the control part 60 are demonstrated.

<Configuration of indoor unit>
As shown in FIGS. 2 and 3, the indoor unit 1 includes an indoor unit body 10 and a decorative panel 11. As shown in FIG. 3, the indoor unit body 10 is disposed in the ceiling space so as to face the opening O of the ceiling. The decorative panel 11 is attached to the indoor unit main body 10 so as to face a suction side flow path 12a and a blowout side flow path 12b of the indoor unit main body 10, which will be described later, across the opening O. Below, the indoor unit main body 10 and the decorative panel 11 will be described.

  As shown in FIGS. 2 and 3, the indoor unit body 10 has an indoor unit casing 2. Moreover, as shown in FIG. 3, the indoor unit casing 2 has a substantially rectangular parallelepiped shape, and has a box-like form with an open bottom surface. Furthermore, the indoor unit casing 2 accommodates the indoor fan 6 and the indoor heat exchanger 5 described above.

  The indoor fan 6 is configured in a cylindrical shape, and blades are provided on the circumferential surface in the direction of the rotation axis. The indoor fan 6 generates an air flow in a direction intersecting with the rotation axis by being driven to rotate. For this reason, the indoor fan 6 sucks indoor air into the indoor unit 1 and blows out air after heat exchange with the indoor heat exchanger 5 into the room.

  The indoor heat exchanger 5 includes a heat transfer tube that is bent back and forth at both ends in the longitudinal direction and a plurality of fins inserted from the heat transfer tube, and performs heat exchange between the air that contacts the heat transfer tube. The indoor heat exchanger 5 functions as a radiator during heating operation and functions as a heat absorber during cooling operation.

  As described above, an air flow path is formed in the indoor unit casing 2 until the sucked indoor air exchanges heat with the indoor heat exchanger 5 and is blown out indoors again. In addition, the air flow path is again connected to the indoor side through the indoor fan 6 from the indoor heat exchanger 5 and the suction side flow path 12a, which is a flow path part from the air sucked from the room to the indoor heat exchanger 5. It is comprised from the blowing side flow path 12b which is a flow-path part until it blows off.

  The decorative panel 11 is a substantially rectangular parallelepiped member larger than the top surface of the indoor unit casing 2 in plan view. Moreover, as shown in FIG.2 and FIG.3, the air intake 3 and the air blower outlet 4 are formed in the decorative panel 11. FIG.

  The air intake 3 is a substantially rectangular opening disposed at a position that coincides with the suction-side flow path 12 a of the indoor unit body 10. Indoor air is taken into the indoor unit casing 2 from the air intake 3 by the indoor fan 6. The air intake 3 is provided with a panel 13 that can cover the air intake 3. The panel 13 can be shielded or opened by being rotated by a panel drive motor (not shown).

  The air outlet 4 is a substantially rectangular opening that is disposed at a position that coincides with the outlet-side flow path 12 b of the indoor unit body 10. Further, a flap 8 is provided in the vicinity of the air outlet 4 so as to cover the air outlet 4. The flap 8 is able to shield or open the air outlet 4 by being rotated about the rotation axis by a flap motor 8a (see FIG. 4). Moreover, the flap 8 can change the blowing direction of the air blown into the room from the air outlet 4.

<Control unit>
As shown in FIG. 4, the control unit 60 includes a communication unit 61, an indoor fan 6, an indoor heat exchanger 5, a flap motor 8a, a compressor 24, an outdoor fan 22, an outdoor heat exchanger 21, an four-way switching valve 23, and It is connected to various devices such as the expansion valve 25. The control unit 60 includes a communication control unit 61a. The communication control unit 61a acquires control signals such as operation start and operation stop transmitted from the remote controller 50 received by the communication unit 61. The remote controller 50 is a device that allows the user to remotely operate the air conditioner 100, receives an instruction from the user, and transmits a control command to the communication unit 61 by wireless means such as infrared rays.

  Further, the control unit 60 includes a normal operation control unit 62 and an internal clean operation control unit 63. The normal operation control unit 62 controls the operation of the various devices so that the air conditioner 100 performs normal operation including cooling operation, heating operation, dehumidification operation, and the like. For example, when the communication unit 61 receives a control command for starting the cooling operation from the user via the remote controller 50, the communication control unit 61a acquires the control command received by the communication unit 61 as a control signal. And based on the control signal which the communication control part 61a acquired, the normal operation control part 62 performs operation control according to air_conditionaing | cooling operation by performing operation control of various apparatuses, such as the compressor 24. FIG. Thereby, the cooling operation is performed in the air conditioner 100. At this time, the indoor heat exchanger 5 functions as a heat absorber as described above.

  The internal clean operation control unit 63 performs operation control of the internal clean operation so that the internal clean operation is performed in the air conditioner 100 by performing operation control of various devices. In the present embodiment, the internal clean operation is automatically performed after the cooling operation or the dehumidifying operation is performed.

  The internal clean operation control unit 63 has an air volume adjusting unit 64 that controls the rotation speed of the indoor fan 6. The air volume adjusting unit 64 controls the rotation of the indoor fan 6 to adjust the air volume of the air blown into the room from the indoor unit 1 in the internal clean operation.

  Further, as shown in FIG. 5, the internal clean operation control unit 63 performs the strong air blowing states F1, F3, the weak air blowing states F2, F4, the heating state H1, and the stop states St1, St2, St3 in the internal clean operation. , St4, St5 and the dry shock state D1 are switched.

  In the strong air blowing states F1 and F3, the internal clean operation control unit 63 controls the operation of the flap motor 8a so that the inclination angle of the flap 8 becomes a predetermined angle (for example, 10 degrees). In the strong air blowing states F1 and F3, the air volume adjusting unit 64 controls the rotation of the indoor fan 6 so that the air volume is larger than the air volume generated by the indoor fan 6 during normal operation. Here, the predetermined angle is an angle at which the air blown from the air outlet 4 has a wind direction that does not directly hit the user.

  In the weak air blowing states F2 and F4, the internal clean operation control unit 63 controls the operation of the flap motor 8a so that the inclination angle of the flap 8 becomes a predetermined angle (for example, 10 degrees). Further, in the weak air blowing states F2 and F4, the air volume adjusting unit 64 controls the rotation of the indoor fan 6 so that the air volume is smaller than the air volume generated by the indoor fan 6 during normal operation. Here, the predetermined angle is an angle at which the air blown from the air outlet 4 has a wind direction that does not directly hit the user.

  In the heating state H <b> 1, the internal clean operation control unit 63 controls the flap motor 8 a so that the flap 8 covers the air outlet 4. Further, the internal clean operation control unit 63 circulates the refrigerant in the refrigerant circuit by controlling various devices such as the compressor 24. At this time, the indoor heat exchanger 5 functions as a radiator. In the heating state H1, the internal clean operation control unit 63 does not control the operation of the indoor fan 6, and the indoor fan 6 is not rotating.

  In the stop states St1, St2, St3, St4, and St5, the internal clean operation control unit 63 controls the flap motor 8a so that the flap 8 is in a state of shielding the air outlet 4. Further, the internal clean operation control unit 63 stops driving various devices that are being driven. The stopped states St1, St2, St3, St4, and St5 are continued for 10 seconds or more.

  In the dry shock state D1, the internal clean operation control unit 63 controls the operation of the flap motor 8a so that the inclination angle of the flap 8 becomes a predetermined angle (for example, 10 degrees). Further, the internal clean operation control unit 63 circulates the refrigerant in the refrigerant circuit by controlling various devices such as the compressor 24. At this time, the indoor heat exchanger 5 functions as a radiator. Further, the air volume adjusting unit 64 controls the rotation of the indoor fan 6 so that the indoor fan 6 has a predetermined air volume. In the present embodiment, the inclination angle of the flap 8 in the dry shock state D1 and the inclination angle of the flap 8 in the strong air blowing states F1, F3 and the weak air blowing states F2, F4 are the same angle, but are not limited thereto. Instead, the inclination angle of the flap 8 in each state may be different.

<Control action of internal clean operation control unit>
Hereinafter, the control operation of the internal clean operation control unit 63 will be described. Hereinafter, a case where the air conditioner 100 is performing a cooling operation will be described as an example.

  When the communication control unit 61a acquires a control signal for stopping the cooling operation from the remote controller 50 or the like via the communication unit 61, the normal operation control unit 62 controls the various devices so that the air conditioner 100 performs the cooling operation. Stop. When the cooling operation is stopped in the air conditioner 100, the internal clean operation control unit 63 starts the internal clean operation in the air conditioner 100 by controlling various devices. First, the internal clean operation control unit 63 drives the flap motor 8a and drives the indoor fan 6 to switch from the state where the cooling operation is stopped to the strong air blowing state F1. Then, when a predetermined time (for example, 30 seconds) elapses after the internal clean operation is started, the internal clean operation control unit 63 switches the state from the strong air blowing state F1 to the stop state St1. Then, when a predetermined time (for example, 30 seconds) elapses from when the state is switched from the strong blowing state F1 to the stopped state St1, the internal clean operation control unit 63 switches the state from the stopped state St1 to the weakly blowing state F2. . Further, when a predetermined time (for example, 10 minutes) elapses from when the stop state St1 is switched to the weakly blown state F2, the internal clean operation control unit 63 switches the state from the weakly blown state F2 to the stopped state St2. Then, when a predetermined time (for example, 30 seconds) elapses from when the state is switched from the weak air blowing state F2 to the stopped state St2, the internal clean operation control unit 63 switches the state from the stopped state St2 to the heating state H1. Further, when a predetermined time (for example, 2 minutes) elapses from when the state is switched from the stopped state St2 to the heating state H1, the internal clean operation control unit 63 switches the state from the heating state H1 to the stopped state St3. Further, when a predetermined time (for example, 10 minutes) elapses from when the state is switched from the heating state H1 to the stopped state St3, the internal clean operation control unit 63 switches the state from the stopped state St3 to the strong air blowing state F3. Then, when a predetermined time (for example, 30 seconds) elapses from when the state is switched from the stopped state St3 to the strong air blowing state F3, the internal clean operation control unit 63 switches the state from the strong air blowing state F3 to the stopped state St4. Further, when a predetermined time (for example, 30 seconds) elapses after the state is switched from the strong air blowing state F3 to the stop state St4, the internal clean operation control unit 63 switches the state from the stop state St4 to the weak air blowing state F4. Then, when a predetermined time (for example, 13 minutes) elapses from when the state is switched from the stopped state St4 to the weakly blowing state F4, the internal clean operation control unit 63 switches the state from the weakly blowing state F4 to the stopped state St5. . When a predetermined time (for example, 30 seconds) elapses from when the state is switched from the weak air blowing state F4 to the stopped state St5, the internal clean operation control unit 63 switches the state from the stopped state St5 to the dry shock state D1. And when predetermined time (for example, 1 minute) passes since the state switched from the stop state St5 to the dry shock state D1, the internal clean operation control unit 63 controls various devices, thereby controlling the air conditioner. Stop internal clean operation.

  In the present embodiment, the internal clean operation control unit 63 causes the strong air blowing states F1, F3, the weak air blowing states F2, F4, the heating state H1, the stop states St1, St2, St3, St4, St5, and the dry air. The shock state D1 is switched in the order described above, but may be switched in the order in which these states are arbitrarily combined as long as moisture in the indoor fan 6 and the indoor heat exchanger 5 can be removed. .

<Features>
(1)
Conventionally, it is known that when a cooling operation is performed in an air conditioner, the interior of an indoor unit is in a high-temperature and high-humidity state, and an environment in which mold and bacteria are likely to propagate is known.

  Therefore, in recent years, there is an air conditioner in which a drying operation for drying the interior of an indoor unit is performed after the cooling operation is performed. For example, in an air conditioner disclosed in Japanese Patent Application Laid-Open No. 11-2111184, after a cooling operation is performed, a draining operation (blower operation and intermittent heating) is performed to remove moisture attached to the indoor heat exchanger. Operation) is performed, and then heating operation is performed as a drying operation. In this air conditioner, moisture in the indoor unit can be removed by performing a draining operation before the drying operation. For this reason, in this air conditioner, the humidity inside the indoor unit can be further reduced. This can suppress the growth of mold and bacteria in the indoor unit.

  By the way, in this air conditioner, air is blown out from the interior of the indoor unit into the room with a weak air volume in the draining operation and the drying operation. For this reason, in the draining operation or the drying operation, there is a possibility that the air-conditioning target person may feel uncomfortable by blowing out air from the indoor unit into the room for a long time.

  Therefore, in the above embodiment, in the internal clean operation corresponding to the drying operation, the internal clean operation control unit 63 is switched in the order of the strong air blowing state F1, the weak air blowing state F2, and the heating state H1. In the strong air blowing state F1, moisture existing in the indoor unit 1 can be blown off. For this reason, in the internal clean operation, moisture in the indoor unit 1 can be removed in a short time compared to the case where there is no strong air blowing state.

  Moreover, in the weak ventilation state F2, the temperature inside the indoor unit 1 can be brought close to the room temperature. Furthermore, in the heating state H1, the water | moisture content inside the indoor unit 1 which could not be blown off in the strong ventilation state F1 can be removed. For this reason, in the heating state H1, the rapid rise of the temperature inside the indoor unit 1 can be suppressed. Therefore, generation of steam from the interior of the indoor unit in the heating state H1 can be suppressed. Furthermore, after the internal clean operation is performed, it is possible to suppress the occurrence of condensation due to the temperature inside the indoor unit 1 decreasing again.

  As a result, in the internal clean operation, it is possible to make it difficult for the air conditioning target person to feel uncomfortable.

(2)
In the above embodiment, in the internal clean operation, the internal clean operation control unit 63 switches the state to the stop states St1, St2, St4, St5. In the stopped state, it is possible to make it easy to drip moisture at a portion where it is difficult for the moisture of various devices housed inside the indoor unit 1 such as the indoor heat exchanger 5 to drip.

  Thereby, the water | moisture content inside the indoor unit 1 can be removed.

(3)
In the above embodiment, in the internal clean operation, the internal clean operation control unit 63 switches the state in the order of the strong air blowing state F1, the stopped state St1, and the weak air blowing state F2. For this reason, dripping of the water | moisture content inside the indoor unit 1 which was not able to be blown off in the strong ventilation state F1 can be promoted in the stop state St1.

  As a result, moisture inside the indoor unit 1 can be further removed.

(4)
In the said embodiment, the internal clean operation control part 63 switches a state in order of the weak ventilation state F2, the heating state H1, and the stop state St2. For this reason, dripping of the water | moisture content inside the indoor unit 1 which was not able to be removed in the strong ventilation state F1, the stop state St1, and the weak ventilation state F2 can be promoted in the stop state St2. Moreover, the water | moisture content inside the indoor unit 1 can be removed in the heating state H1.

  As a result, moisture inside the indoor unit 1 can be further removed.

(5)
In the above embodiment, the internal clean operation control unit 63 switches the state from the heating state H1 to the stop state St3. For this reason, heat radiation and moisture release are performed from the indoor heat exchanger 5 which has become high temperature in the heating state H1 to the inside of the indoor unit 1.

  Thereby, more moisture can be desorbed from the indoor heat exchanger 5.

(6)
In the above embodiment, the internal clean operation control unit 63 switches the state from the stop state St3 to the strong air blow state F3, the stop state St4, the weak air blow state F4, and the stop state St5 in this order. For this reason, the water | moisture content which exists in the indoor unit 1 can further be removed in the strong ventilation state F3 and the weak ventilation state F4. Moreover, dripping of the water | moisture content which exists in the indoor unit 1 can be further promoted in the stop state St4 and the stop state St5.

  As a result, moisture inside the indoor unit 1 can be further removed.

(7)
In the above embodiment, the internal clean operation control unit 63 switches the state from the stop state St5 to the dry shock state D1. For this reason, the humidity inside the indoor unit 1 can be rapidly reduced.

  As a result, the growth of mold and bacteria can be efficiently suppressed.

<Modification>
(A)
In the above embodiment, in the internal clean operation, after the heating state H1 is continued for a predetermined time (in the above embodiment, 2 minutes), the state is switched from the heating state H1 to the stop state St3.

  Instead of this, when the temperature of the indoor heat exchanger reaches a predetermined temperature, the heating state may be switched to the stop state.

  This can reduce the possibility that the interior of the indoor unit will be hotter than necessary.

(B)
In the above embodiment, the internal clean operation is automatically performed after the cooling operation or the dehumidifying operation is performed.

  Instead of this, the user may be able to select whether or not the internal clean operation is automatically started after the cooling operation or the dehumidifying operation is performed.

  As an example of such an air conditioner, an air conditioner in which an “automatic operation setting” switch is provided in the remote controller will be described. The “automatic operation setting” switch is a switch for the user to set whether to automatically start the internal clean operation after the cooling operation or the dehumidifying operation is performed in the air conditioner. For this reason, in this air conditioner, when the “automatic operation setting” switch is pressed by the user, the internal clean operation control unit performs the internal clean operation after the cooling operation or the dehumidifying operation is stopped in the air conditioner. Various devices are controlled to start. In addition, when the “automatic operation setting” switch is not pressed by the user, various devices are not controlled by the internal clean operation control unit, and various devices are controlled by the normal operation control unit. Dehumidification operation is stopped. For this reason, it can be set according to the user's preference whether the internal clean operation is automatically started after the cooling operation or the dehumidifying operation.

  As a result, user comfort can be improved.

  Further, in such an air conditioner, when the “automatic operation setting” switch is not pressed by the user, the internal clean operation is not automatically started. There is a risk of breeding. For this reason, when an internal clean operation is required, a notification unit may be provided so as to notify that the internal clean operation is required. Further, when the internal clean operation is being performed, the notification unit may notify that the internal clean operation is being performed.

  Thereby, it is possible to make the user easily recognize that the internal clean operation is being executed or that the internal clean operation is necessary.

  Since this invention can make it difficult to give discomfort to the air-conditioning subject in the drying operation, the application to an air conditioner is effective.

1 is a schematic refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention. The schematic perspective view of an indoor unit (ceiling is omitted). Sectional drawing of an indoor unit (equivalent to the III-III cross section of FIG. 2). The control block diagram of the air conditioner which concerns on embodiment of this invention. The figure which shows the control action of an internal clean operation control part.

Explanation of symbols

1 Indoor Unit 5 Indoor Heat Exchanger 6 Indoor Fan (Blower Fan)
62 Normal operation control unit 63 Internal clean operation control unit (dry operation control unit)
100 Air conditioner D1 Dry shock state (second heating state)
F1 Strong air blowing state F2 Weak air blowing state F3 Strong air blowing state (first air blowing state)
F4 Weak air condition (first air condition)
H1 heating state (first heating state)
St1 stop state (first stop state)
St2 stop state (second stop state)
St3 stop state (third stop state)
St4, St5 stop state (fourth stop state)

Claims (7)

A cooling operation that includes an indoor unit (1) that houses therein the blower (6) and the indoor heat exchanger (5), and that causes the indoor heat exchanger to function as a heat absorber; and the indoor unit after the cooling operation An air conditioner that performs at least a drying operation for drying the interior of the air conditioner,
A normal operation control unit (62) for controlling the cooling operation;
A drying operation control unit (63) for performing operation control of the drying operation,
The drying operation control unit includes a strong air blowing state (F1) in which the blower is operated at a predetermined air volume, a weak air blowing state (F2) in which the air fan is operated at an air volume smaller than the predetermined air volume, and the indoor heat exchanger is a radiator. The state is switched in the order of the first heating state (H1) to function as
Air conditioner (100). The drying operation control unit switches the state to a first stop state (St1) in which the operation of the blower and the function of the indoor heat exchanger are stopped for a first predetermined time before switching to the first heating state.
The air conditioner according to claim 1. The drying operation control unit switches the state in the order of the strong air blowing state, the first stop state, and the weak air blowing state.
The air conditioner according to claim 2. The drying operation control unit switches the state in the order of the weak air blowing state, the operation of the blower and the function of the indoor heat exchanger for a second predetermined time (St2), and the first heating state.
The air conditioner according to claim 3. The drying operation control unit is in a third stop state (St3) in which the operation of the blower and the function of the indoor heat exchanger are stopped for a third predetermined time longer than the first predetermined time from the first heating state. Further switching,
The air conditioner according to any one of claims 2 to 4. From the third stop state, the drying operation control unit is configured to stop the first blower state (F3, F4), the operation of the blower, and the function of the indoor heat exchanger for a fourth stop time (St4, St4). The state is further switched in the order of St5).
The air conditioner according to claim 5. The drying operation control unit further switches from the fourth stop state to a second heating state (D1) in which the blower is operated and the indoor heat exchanger functions as a radiator.
The air conditioner according to claim 6.

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