JP4697260B2 - Air conditioner - Google Patents

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 a cooling operation is performed, there is an air conditioner in which a blowing operation is performed as a drying operation (see Patent Document 1) or a heating operation is performed as a drying operation (see Patent Document 2). In addition, after the cooling operation is performed, a water draining operation (blower operation and intermittent heating operation) for removing moisture attached to the indoor heat exchanger is performed, and then the heating operation is performed as a drying operation. There exists a harmony machine (refer patent document 4). These air conditioners reduce the humidity inside the indoor unit by performing each drying operation, and suppress the growth of mold and bacteria.
JP-A-5-223325 JP 2007-139352 A JP 11-2111184 A

  However, as in the air conditioner disclosed in Patent Document 1, when the air blowing operation is performed as the drying operation, the relative humidity inside the indoor unit is high, and thus the moisture inside the indoor unit cannot be completely removed. There is a fear.

  Moreover, when the heating operation is performed as the drying operation as in the air conditioner disclosed in Patent Document 2, steam may be generated inside the indoor unit due to a sudden rise in the temperature inside the indoor unit. There is. Further, in this case, when the temperature inside the indoor unit decreases again after the drying operation, there is a possibility that the air is cooled and dew condensation occurs inside the indoor unit.

  Furthermore, even when the draining operation is performed separately from the drying operation as in the air conditioner disclosed in Patent Document 3, the moisture of various devices housed inside the indoor unit including the indoor heat exchanger is dripped. There is a possibility that moisture cannot be completely removed in a difficult part. For this reason, even if drying operation is performed after that, there is a possibility that the moisture inside the indoor unit cannot be completely removed.

  As described above, in these air conditioners, moisture remains inside the indoor unit, so that mold and bacteria may grow inside the indoor unit.

  Then, the subject of this invention is providing the air conditioner which can suppress the proliferation of mold | fungi and bacteria inside an indoor unit.

An air conditioner according to a first aspect of the present invention includes an indoor unit that houses a blower and an indoor heat exchanger therein, a cooling operation that causes the indoor heat exchanger to function as a heat absorber, and an interior of the indoor unit after the cooling operation Is an air conditioner that performs at least a drying operation for drying the water, 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. The state of the drying operation includes a first air blowing state, a heating state, and a stopped state . A 1st ventilation state is a state which operates an air blower. The heating state is a state in which the indoor heat exchanger functions as a radiator. The first stop state is a state in which the operation of the blower and the function of the indoor heat exchanger are stopped for a first predetermined time. Furthermore, a drying operation control part switches a state in order of a 1st ventilation state, a 1st stop state, and a heating state.

  In the air conditioner according to the first aspect of the invention, in the drying operation, the air conditioner is switched to the first blowing state, the heating state, and the first stopped state. For this reason, while it is a stop state, it can make it easy to drip a water | moisture content in the part which the water | moisture content of the various apparatuses accommodated in the indoor unit containing an indoor heat exchanger does not drip. Therefore, moisture in the indoor unit can be removed as compared with the drying operation that does not include the stopped state.

  This can suppress the growth of mold and bacteria in the indoor unit.

  Moreover, in this air conditioner, the state is switched in order of the 1st ventilation state, the 1st stop state, and the heating state by the drying operation control part. For this reason, in the 1st ventilation state, the temperature inside an indoor unit can be brought close to the room temperature. In addition, in the first stop state, it is possible to prompt the dripping of moisture generated inside the indoor unit. Furthermore, moisture remaining inside the indoor unit can be removed in the heating state. Therefore, a rapid increase in the temperature inside the indoor unit can be suppressed in the heating state.

  Thereby, generation | occurrence | production of steam in a heating state can be suppressed, and the dew condensation inside an indoor unit can be suppressed.

  An air conditioner according to a second aspect of the present invention is the air conditioner of the first aspect, wherein the first predetermined time is 10 seconds or more. For this reason, in this air conditioner, dripping of the moisture generated inside the indoor unit can be promoted.

An air conditioner according to a third aspect of the present invention is the air conditioner of the first or second aspect , wherein the drying operation control unit has an air volume adjustment unit that adjusts an air flow rate by the blower. In addition, in the first air blowing state, the air volume adjusting unit switches between a weak air blowing state where the air blowing amount of the blower is small and a strong air blowing state where the air blowing amount of the blower is larger than the weak air blowing state.

In the air conditioner according to the third aspect of the invention, the first air blowing state is switched between the weak air blowing state and the strong air blowing state. For this reason, in the weak air blowing state, the temperature inside the indoor unit can be brought close to the room temperature. Moreover, in the strong air blowing state, moisture existing inside the indoor unit can be blown off and removed. Therefore, for example, compared with the case where the first air blowing state is only the weak air blowing state, moisture generated inside the indoor unit can be removed in a short time.

  Thereby, even when there is a user in the room, it is possible to make it difficult for the user to feel uncomfortable due to the blowing state continuing for a long time.

An air conditioner according to a fourth aspect of the present invention is the air conditioner according to the third aspect of the present invention, wherein the drying operation control unit switches the state in the order of the weak air blowing state, the second stop state, and the strong air blowing 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. For this reason, the temperature inside the indoor unit can be brought close to the room temperature in the weakly blown state, and dripping of moisture existing inside the indoor unit can be promoted in the second stopped state. Moreover, in the strong air blowing state, moisture existing inside the indoor unit that has not been dropped can be blown off.

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

An air conditioner according to a fifth aspect of the present invention is the air conditioner of the third or fourth 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 heating state. For this reason, dripping of the water | moisture content inside the indoor unit which could not be blown off in the strong wind state can be promoted by the first stop state. Moreover, the water | moisture content inside the indoor unit which was not dripped during the 1st stop state can be dried in a heating state.

  Thereby, drying of the interior of the indoor unit can be promoted.

An air conditioner according to a sixth aspect of the present invention is the air conditioner according to any one of the first to fifth aspects of the invention, wherein the drying operation control unit performs the operation of the blower and the function of the indoor heat exchanger from the heating state. 3 Switch to the third stop state, which is stopped for a predetermined time. The third predetermined time is longer than the first predetermined time.

In the air conditioner pertaining to the sixth aspect of the invention, the state switches from the 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 heating state to the inside of the indoor unit.

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

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 the state from the third stop state to the second 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 be further removed in a 2nd ventilation state. Moreover, the water | moisture content which exists in an indoor unit in a 4th stop state can be dripped further.

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

  The second air blowing state here may be the same state as the first air blowing state, or may be a state different from the first air blowing state (for example, a state where the operating time of the blower is different from the first state).

An air conditioner according to an eighth aspect of the present invention is the air conditioner of the seventh aspect , wherein the heating state includes a second heating state in which the indoor heat exchanger functions as a radiator and the blower is operated. The drying operation control unit further switches from the fourth stop state to the second heating state.

In the air conditioner according to the eighth 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.

  The air conditioner according to a ninth aspect of the present invention is the air conditioner of the first aspect, wherein the heating state includes a first heating state and a second heating state. The first heating state is a state in which the indoor heat exchanger functions as a radiator without operating the blower. The second heating state is a state in which the indoor heat exchanger functions as a radiator and the blower is operated. In this air conditioner, the heating state includes a state in which the indoor heat exchanger functions as a radiator without operating the blower, and a state in which the indoor heat exchanger functions as a radiator and operates the blower It is.

  In the air conditioner according to the first aspect of the present invention, the growth of mold and bacteria in the indoor unit can be suppressed.

  In the air conditioner according to the second aspect of the invention, it is possible to promote the dripping of moisture generated inside the indoor unit.

In the air conditioner according to the third aspect of the invention, even when the user is in the room, it is possible to make it difficult for the user to feel uncomfortable due to the air blowing state continuing for a long time.

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

In the air conditioner according to the fifth aspect of the invention, drying of the interior of the indoor unit can be promoted.

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

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

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

  In the air conditioner according to the ninth aspect of the present invention, as the heating state, the state in which the indoor heat exchanger functions as a radiator without operating the blower, the indoor heat exchanger functions as a radiator, and the fan is operated. States.

<Outline of air conditioner>
A schematic refrigerant circuit of an air conditioner 100 according to an embodiment of the present invention is shown in FIG. 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 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 includes the stop states St1 and St2 for dripping moisture adhering to the indoor heat exchanger 5, the heating state H1 for evaporating the moisture inside the indoor unit 1, and This is performed by combining with the dry shock state D1.

  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. 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. In the present embodiment, the internal clean operation is automatically performed after the cooling operation or the dehumidifying operation is performed.

  Further, as shown in FIG. 5, the internal clean operation control unit 63 includes, in the internal clean operation, an air blowing state F1, F2, a heating state (corresponding to the first heating state) H1, a stop state St1, St2, St3, The dry shock state (corresponding to the second heating state) D1 is switched.

  In the air blowing states F1 and F2, 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). 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. The predetermined air volume here is an air volume smaller than the air volume generated by the indoor fan 6 during normal operation. In addition, the predetermined angle referred to here 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, and St3, 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, and St3 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. Further, 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 blowing states F1 and F2 are the same angle, but are not limited to this, and the flap in each state The inclination angle of 8 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 transmitted from the remote controller 50 or the like via the communication unit 61, the normal operation control unit 62 controls various devices, so that in the air conditioner 100 Stop the cooling operation. When the cooling operation is stopped, 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 blower state F1. Then, when a predetermined time (for example, 10 minutes) has elapsed since the start of the internal clean operation, the internal clean operation control unit 63 switches the state from the blower state F1 to the stop state St1. And when predetermined time (for example, 30 seconds) passes since the state switched from the ventilation state F1 to the stop state St1, the internal clean operation control part 63 switches a state from the stop state St1 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 St1 to the heating state H1, the internal clean operation control unit 63 switches the state from the heating state H1 to the stopped state St2. Furthermore, when a predetermined time (for example, 10 minutes) elapses from when the state is switched from the heating state H1 to the stopped state St2, the internal clean operation control unit 63 switches the state from the stopped state St2 to the blowing state F2. Then, when a predetermined time (for example, 13 minutes) elapses from when the state is switched from the stopped state St2 to the blowing state F2, the internal clean operation control unit 63 switches the state from the blowing state F2 to the stopped state St3. Further, when a predetermined time (for example, 30 seconds) elapses after the state is switched from the blowing state F2 to the stopped state St3, the internal clean operation control unit 63 switches the state from the stopped state St3 to the dry shock state D1. And when predetermined time (for example, 1 minute) passes after switching a state from the stop state St3 to the dry shock state D1, the internal clean operation control part 63 will control the inside of the air conditioner 100 by controlling various apparatuses. Stop clean operation.

  In this embodiment, the internal clean operation control unit 63 causes the air blowing states F1, F2, the heating state (corresponding to the first heating state) H1, the stop states St1, St2, St3, and the dry shock state (second D1 is switched in the order described above, but if the moisture in the indoor fan 6 and the indoor heat exchanger 5 can be removed, these states are switched in an arbitrarily combined order. May be.

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

  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 Laid-Open No. 5-223325, after a cooling operation is performed, a blowing operation is performed as a drying operation. Moreover, in the air conditioner disclosed in JP 2007-139352 A, a heating operation is performed as a drying operation. Furthermore, in the air conditioner disclosed in Japanese Patent Application Laid-Open No. 11-2111184, after the cooling operation is performed, a draining operation (blower operation and intermittent heating) is performed to remove water adhering to the indoor heat exchanger. Operation) is performed, and then heating operation is performed as a drying operation. These air conditioners reduce the humidity inside the indoor unit by performing each drying operation, and suppress the growth of mold and bacteria.

  However, as in the air conditioner disclosed in JP-A-5-223325, when the air blowing operation is performed as the drying operation, the relative humidity inside the indoor unit is high. There is a risk that it cannot be removed.

  In addition, as in the air conditioner disclosed in Japanese Patent Application Laid-Open No. 2007-139352, when the heating operation is performed as the drying operation, the temperature inside the indoor unit suddenly rises to cause steam inside the indoor unit. May occur. Further, in this case, when the temperature inside the indoor unit decreases again after the drying operation, there is a possibility that the air is cooled and dew condensation occurs inside the indoor unit.

  Further, as in the air conditioner disclosed in Japanese Patent Application Laid-Open No. 11-2111184, various devices housed inside the indoor unit including the indoor heat exchanger even when the draining operation is performed separately from the drying operation. There is a possibility that the moisture cannot be completely removed in a portion where it is difficult to dripping the moisture. For this reason, even if drying operation is performed after that, there is a possibility that the moisture inside the indoor unit cannot be completely removed.

  As described above, in these air conditioners, moisture remains inside the indoor unit, so that mold and bacteria may grow inside the indoor unit.

  Therefore, in the above embodiment, in the internal clean operation, which is an operation performed to dry the interior of the indoor unit 1, the air blowing states F1, F2, the heating state H1, and the stopped states St1, St2, St3 are switched. For this reason, during the stop states St1, St2 and St3, it is possible to make it easy to drip moisture adhering to the indoor heat exchanger 5 and the like in which the moisture is difficult to drip inside the indoor unit 1. Therefore, moisture in the indoor unit 1 can be removed as compared with the drying operation that does not include the stopped state.

  Thereby, the growth of mold and bacteria in the indoor unit 1 can be suppressed.

  Moreover, since the stop states St1, St2, and St3 are continued for 10 seconds or more, dripping of moisture can be promoted inside the indoor unit 1.

(2)
In the said embodiment, the internal clean operation control part 63 switches from the state which the air_conditionaing | cooling operation stopped to the ventilation state F1. Then, when a predetermined time (for example, 10 minutes) has elapsed since the start of the internal clean operation, the internal clean operation control unit 63 switches the state from the blower state F1 to the stop state St1. And when predetermined time (for example, 30 seconds) passes since the state switched from the ventilation state F1 to the stop state St1, the internal clean operation control part 63 switches a state from the stop state St1 to the heating state H1. For this reason, in the ventilation state F1, the temperature inside the indoor unit 1 can be brought close to the room temperature. Moreover, in the stop state St1, dripping of the moisture generated inside the indoor unit can be promoted. Furthermore, moisture remaining inside the indoor unit 1 can be removed in the heating state H1. Therefore, in the heating state H1, it is possible to suppress a rapid rise from turning on the interior of the indoor unit 1.

  Thereby, generation | occurrence | production of the steam in the indoor unit 1 inside the heating state H1 can be suppressed. Moreover, generation | occurrence | production of the dew condensation in the indoor unit 1 can be suppressed.

(3)
In the said embodiment, rotation of the indoor fan 6 is controlled so that it may become an air volume smaller than the air volume produced | generated by the indoor fan 6 at the time of normal operation in ventilation state F1, F2. For this reason, even when there is a user in the room, it is possible to make it difficult for the user to feel uncomfortable due to the blowing states F1 and F2.

(4)
In the above embodiment, when a predetermined time (for example, 2 minutes) elapses from when the state is switched from the stop state St1 to the heating state H1, the internal clean operation control unit 63 changes the state from the heating state H1 to the stop state St2. Switch. 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.

  As a result, more water can be desorbed from the indoor unit heat exchanger 5.

(5)
In the above embodiment, when a predetermined time (for example, 10 minutes) elapses from when the state is switched from the heating state H1 to the stop state St2, the internal clean operation control unit 63 changes the state from the stop state St2 to the blower state F2. Switch. Then, when a predetermined time (for example, 13 minutes) elapses from when the state is switched from the stopped state St2 to the blowing state F2, the internal clean operation control unit 63 switches the state from the blowing state F2 to the stopped state St3. For this reason, the water | moisture content which exists in the indoor unit 1 can be further removed in the ventilation state F2. Moreover, the water | moisture content which exists in the indoor unit 1 can be dripped further in stop state St3.

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

(6)
In the above embodiment, when a predetermined time (for example, 30 seconds) elapses after the state is switched from the blowing state F2 to the stopped state St3, the internal clean operation control unit 63 switches the state from the stopped state St3 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 said embodiment, rotation of the indoor fan 6 is controlled so that it may become an air volume smaller than the air volume produced | generated by the indoor fan 6 at the time of normal operation in ventilation state F1, F2.

  Instead, the rotation of the indoor fan is adjusted so that the air volume in the air blowing state is smaller than the air volume during normal operation, and the case where the air volume is equal to or higher than that during normal operation. It may be controlled.

  For example, in the blowing state of the dry operation, the weak air blowing states F1 and F3 that are smaller than the amount of air generated by the indoor fan during normal operation, and the strong amount of air that is larger than the amount of air generated by the indoor fan during normal operation. A control operation of the internal clean operation control unit having an air volume adjusting unit capable of switching between the blowing states F2 and F4 will be described with reference to FIG. Hereinafter, a case where the air-conditioning apparatus is performing a cooling operation will be described as an example.

<Control action of internal clean operation control unit>
When the communication control unit obtains a cooling operation stop control signal from a remote controller or the like via the communication unit, the normal operation control unit controls various devices to stop the cooling operation in the air conditioner. When the cooling operation is stopped in the air conditioner, the internal clean operation control unit controls various devices to start the internal clean operation in the air conditioner. First, the internal clean operation control unit switches from the state where the cooling operation is stopped to the weak air blowing state F1 in the air blowing state by driving the flap motor and the indoor fan. Then, when a predetermined time (for example, 10 minutes) has elapsed since the start of the internal clean operation, the internal clean operation control unit switches the state from the weak air blowing state F1 to the stop state St1. When a predetermined time (for example, 30 seconds) elapses from when the state is switched from the weak air blowing state F1 to the stopped state St1, the internal clean operation control unit performs the strong air blowing state F2 in the air blowing state from the stopped state St1. Switch the status to. Further, when a predetermined time (for example, 30 seconds) elapses from the time when the stop state St1 is switched to the strong air blowing state F2, the internal clean operation control unit switches the state from the strong air blowing state F2 to the stop state St2. Then, when a predetermined time (for example, 30 seconds) elapses from when the state is switched from the strong air blowing state F2 to the stopped state St2, the internal clean operation control unit 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 switches the state from the heating state H1 to the stopped state St3. Furthermore, when a predetermined time (for example, 10 minutes) has elapsed since the state was switched from the heating state H1 to the stopped state St3, the internal clean operation control unit changes from the stopped state St3 to the weakly blowing state F3 in the blowing state. Switch the state. Then, when a predetermined time (for example, 13 minutes) elapses from when the state is switched from the stopped state St3 to the blower state F3, the internal clean operation control unit switches the state from the blower state F3 to the stopped state St4. Further, when a predetermined time (for example, 30 seconds) elapses after the state is switched from the blowing state F3 to the stopped state St4, the internal clean operation control unit changes the state from the stopped state St4 to the strong blowing state F4 in the blowing state. Switch. Then, when a predetermined time (for example, 30 seconds) elapses from when the state is switched from the stopped state St4 to the strong blowing state F4, the internal clean operation control unit switches the state from the strong blowing state F4 to the stopped state St5. When a predetermined time (for example, 30 seconds) elapses from when the strong blast state F4 is switched to the stopped state St5, the internal clean operation control unit switches the state from the stopped state St5 to the dry shock state D1. And when predetermined time (for example, 1 minute) passes after the state switches from the stop state St5 to the dry shock state D1, the internal clean operation control unit controls the various devices, thereby Stop clean operation.

  In this air conditioner, in the air blowing state, the weak air blowing states F1 and F3 and the strong air blowing states F2 and F4 are switched to bring the temperature inside the indoor unit closer to the room temperature in the weak air blowing states F1 and F3. Can do. Further, in the strong air blowing states F2 and F4, water existing in the indoor unit can be blown off and removed. Therefore, moisture generated in the indoor unit can be removed in a short time compared to the drying operation without the strong air blowing states F2 and F4.

  Moreover, in this air conditioner, in the drying operation, the states are switched in the order of the weak air blowing states F1 and F3, the stopped states St1 and St4, and the strong air blowing states F2 and F4. For this reason, in stop state St1, St4, dripping of the water | moisture content which exists in an indoor unit can be promoted.

  Furthermore, in this air conditioner, in the drying operation, the state is switched in the order of the strong air blowing state F2, the stopped state St2, and the heating state H1. For this reason, the water | moisture content inside an indoor unit which was not able to be removed during the strong ventilation state F2 can be dripped during the stop state St2. Moreover, the water | moisture content which became the water droplet during the stop state St2 can be dried in the heating state H1.

  Thereby, drying of the interior of the indoor unit can be promoted.

(B)
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 St2.

  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.

(C)
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 the present invention can suppress the growth of mold and bacteria inside the indoor unit, 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. The figure which shows the control action of the internal clean operation control part which concerns on the modification (A) of this invention.

1 Indoor unit 5 Indoor fan (blower)
6 Indoor heat exchanger 62 Normal operation control unit 63 Internal clean operation control unit (dry operation control unit)
64 Air Volume Control Unit 100 Air Conditioner

Claims (9)

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 includes a first blowing state (F1, F2) in which the blower is operated, a heating state in which the indoor heat exchanger functions as a radiator, operation of the blower, and the indoor heat exchanger. A first stop state (St2) in which the function is stopped for a first predetermined time , and
The drying operation control unit switches the state in the order of the first blowing state, the first stop state, and the heating state.
Air conditioner (100). The first predetermined time is 10 seconds or more;
The air conditioner according to claim 1. The drying operation control unit has an air volume adjusting unit (64) for adjusting an air flow rate by the blower,
In the first air blowing state, the air volume adjusting unit switches between a weak air blowing state (F1) where the air blowing amount of the blower is small and a strong air blowing state (F2) where the air blowing amount of the fan is larger than the weak air blowing state. ,
The air conditioner according to claim 1 or 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 (St1), and the strong air blowing state.
The air conditioner according to claim 3 . The drying operation control unit switches the state in the order of the strong air blowing state, the first stop state, and the heating state.
The air conditioner according to claim 3 or 4 . The drying operation control unit further changes the state from the heating state to 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. Switch,
The air conditioner according to any one of claims 1 to 5 . From the third stop state, the drying operation control unit stops the second blowing state (F3, F4), the operation of the blower, and the function of the indoor heat exchanger for the fourth predetermined time (St4). , St5) in order of further switching.
The air conditioner according to claim 6 . The heating state includes a second heating state (D1) in which the indoor heat exchanger functions as a radiator and the fan is operated.
The drying operation control unit, from the fourth stop condition, further switched to the second heating condition (D1),
The air conditioner according to claim 7 .   The heating state is a first heating state (H1) in which the indoor heat exchanger functions as a radiator without operating the blower, and the indoor heat exchanger functions as a radiator, and the blower is operated. Including the second heating state (D1)
The air conditioner according to claim 1.

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