JP2003014334A - Air conditioner and drying operation method of indoor unit thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of reducing propagation of miscellaneous bacteria and fungi by reducing diffusion of highly humid air into a room and eliminating a high temperature high humidity state in an indoor unit in a short time. SOLUTION: The air conditioner comprises an indoor unit 3 containing an outlet 27, a front face opening 25, an upper suction port 26, an indoor fan 10, a rear side heat exchanger section 8a, and a front side heat exchanger 8b of an indoor heat exchanger 8 and an indoor throttling valve 14 interposed between the rear side heat exchanger 8a and the front side heat exchanger 8b. The condition is further provided with an indoor control section for controlling the indoor fan 10 and the indoor throttling valve 14. The air conditioner can execute cooling operation and cycle dry operation wherein the indoor fan 10 is controlled to a specified capacity, and the throttling of the throttling valve 14 is increased to make the front side heat exchanger 8b function as a condenser and the rear side heat exchanger 8a function as an evaporator. A drying operation control means is provided to perform such a control that drying operation mode for performing ventilating operation for a specified time is executed after the cycle dry operation has been executed for a specified time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for preventing the growth of germs and mold in an indoor unit, and a method for drying the indoor unit.

[0002]

2. Description of the Related Art As is well known, in an air conditioner having an outdoor unit and an indoor unit, heat exchange between the indoor heat exchanger provided inside the indoor unit and the indoor air is performed. An indoor fan is provided to promote the indoor air, the indoor air is sucked into the indoor unit by the indoor fan, the sucked indoor air is sent to the indoor heat exchanger for heat exchange, and the air after heat exchange is blown out again into the room. There is.

Therefore, the indoor unit is sucked into the indoor unit together with the indoor air, and dust and dirt are apt to adhere to the inner wall surface of the indoor unit, the indoor fan and the indoor heat exchanger provided inside the indoor unit. There is a problem that bacteria and mold contained in dust and dirt will propagate. In particular, after the cooling operation is stopped, the condensed water condensed in the indoor heat exchanger evaporates in the indoor unit, and the humidity inside the indoor unit increases,
There is a problem that more bacteria and fungi will grow.

When these germs and fungi propagate, there is a possibility that a bad odor will be generated during operation of the air conditioner, and spores of these germs and fungi may be blown out into the room, which is not preferable for hygiene. Further, if mold attached to the indoor heat exchanger or the indoor fan propagates, there is a possibility that the resistance of the ventilation path may be reduced or the air volume of the indoor fan may be reduced, and the performance of the air conditioner may be degraded.

Propagation of such germs and fungi is mainly due to the high temperature and high humidity inside the indoor unit after the cooling operation is stopped. Therefore, immediately after the end of the cooling operation, a method of performing a drying operation by performing a blowing operation or a heating operation to evaporate the moisture in the indoor unit to reduce the humidity and prevent the propagation of various bacteria and mold is known. .

However, in the drying operation by the blowing operation, it takes a long time until the moisture in the indoor unit is exhausted, and all the moisture evaporated in the indoor unit is discharged into the room to increase the indoor humidity. However, there is a problem that the indoor atmosphere becomes unpleasant. On the other hand, in the drying operation by the heating operation, although the time until drying is short, there is a problem that hot and humid air blows out into the room after the end of cooling, which makes the indoor atmosphere more uncomfortable and impairs comfort.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and an object thereof is to reduce the blowing of humid air into an air-conditioned room, and It is possible to reduce the discomfort of the indoor unit, shorten the drying operation time for eliminating the high temperature and high humidity condition in the indoor unit, and reduce the growth of bacteria and mold in the indoor unit. Another object of the present invention is to provide a drying operation method for the air conditioner and the indoor unit thereof.

[0008]

A method for drying an air conditioner and an indoor unit thereof according to the present invention includes a blowout port for blowing air into a room, a suction port for sucking indoor air, an indoor fan,
A first indoor heat exchanger, a second indoor heat exchanger, and a decompression device interposed between the first indoor heat exchanger and the second indoor heat exchanger, and the indoor fan and the decompression device. An indoor unit provided with a control device for controlling the air conditioning operation, controlling the indoor fan to a predetermined air volume, and increasing the throttle of the decompression device to increase the first indoor heat exchanger to the condenser; In an air conditioner capable of a cycle dry operation in which an indoor heat exchanger acts as an evaporator, the control device performs a dry operation mode in which the cycle dry operation is performed for a predetermined time and then a ventilation operation is performed for a predetermined time. A control means is provided, and an air outlet for blowing air into the room, a suction port for sucking indoor air, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and the above-mentioned. 1. An indoor unit that houses a decompression device interposed between an indoor heat exchanger and a second indoor heat exchanger, and includes an indoor unit that includes a control device that controls the indoor fan and the decompression device, A heating operation and a cycle dry operation in which the indoor fan is controlled to have a predetermined air volume, and the decompression device has a large throttle to operate the first indoor heat exchanger as a condenser and the second indoor heat exchanger as an evaporator. In the air conditioner capable of performing the above, the control device includes a drying operation control means for performing a heating operation for a predetermined time after performing the cycle dry operation for a predetermined time. The operation control means detects the temperature of the first indoor heat exchanger, which serves as a condenser during the cycle dry operation, from the condensing portion temperature detecting means and the condensing portion temperature detected by the condensing portion temperature detecting means. It is characterized in that Flip and comprises a first end of the operation means for terminating said cycle drying operation in the drying operation mode,
Further, the first operation ending means further comprises room temperature detecting means for detecting room temperature, and condensing portion temperature difference detecting means for detecting a temperature difference between the condensing portion temperature detected by the condensing portion temperature detecting means and room temperature, Further, the first operation ending means ends the cycle dry operation in the drying operation mode based on the temperature difference detected by the condenser temperature difference detecting means, and further, The drying operation control means includes an evaporation part temperature detecting means for detecting the temperature of the second indoor heat exchanger that serves as an evaporator during the cycle dry operation, and a drying operation according to the evaporation part temperature detected by the evaporation part temperature detecting means. A second operation ending means for ending the air-blowing operation or the heating operation in the mode, and the second operation ending means further comprises:
Further, there are provided room temperature detecting means for detecting room temperature and evaporating section temperature difference detecting means for detecting a temperature difference between the evaporating section temperature detected by the evaporating section temperature detecting means and room temperature, and the second operation ending means is It is characterized in that the air blowing operation or the heating operation in the drying operation mode is ended based on the temperature difference detected by the evaporator temperature difference detecting means, and further, the cycle dry operation is ended in the drying operation mode. Is performed when the difference between the condensation part temperature and the room temperature becomes larger than a preset reference value, and the drying operation control means is an evaporator during a cycle dry operation. 2 Evaporator temperature detecting means for detecting the temperature of the indoor heat exchanger, room temperature detecting means for detecting room temperature, and temperature difference between the evaporator temperature detected by the evaporator temperature detecting means and room temperature Evaporator temperature difference detection means for detecting, and the drying operation control means controls the blow operation duration or heating operation duration in the drying operation mode based on the temperature difference detected by the evaporator temperature difference detection means. In addition, the cycle dry operation is characterized in that it is automatically started after the end of the cooling operation, further, the air conditioner, Further, the present invention is characterized by including a remote controller having a dry operation instruction button, and starting the cycle dry operation based on the operation of the dry operation instruction button. Further, the air outlet for blowing air into the room and the room air are sucked in. A suction port, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and decompression provided between the first indoor heat exchanger and the second indoor heat exchanger. And a control device for controlling the indoor fan and the pressure reducing device, the cooling operation, controlling the indoor fan to have a predetermined air volume, and increasing the throttle of the pressure reducing device to increase the first indoor space. When performing the drying operation of the indoor unit of the air conditioner capable of performing the cycle dry operation in which the heat exchanger acts as a condenser and the second indoor heat exchanger acts as an evaporator, after performing the cycle dry operation for a predetermined time, The method is characterized by performing a blowing operation for a predetermined period of time, and further includes an air outlet for blowing air into a room, a suction port for sucking indoor air, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and the above-mentioned. A decompression device interposed between the first indoor heat exchanger and the second indoor heat exchanger is provided, and a control device for controlling the indoor fan and the decompression device is provided, and cooling and heating operations are performed. Previous The indoor fan is controlled to a predetermined air volume, and the decompression device has a large throttle, and the first indoor heat exchanger is a condenser,
When performing the drying operation of the indoor unit of the air conditioner capable of performing the cycle dry operation in which the second indoor heat exchanger acts as an evaporator, after performing the cycle dry operation for a predetermined time, perform the heating operation for a predetermined time And a blower outlet for blowing air into the room, a suction inlet for sucking indoor air, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and the first indoor heat exchanger. Second
An indoor unit that accommodates a decompression device interposed between the indoor heat exchangers and includes a control device that controls the indoor fan and the decompression device is provided, and the cooling operation, the dehumidification operation, and the indoor operation are performed. An air conditioner capable of performing cycle dry operation in which a fan is controlled to have a predetermined air flow, and the first decompressor has a large throttle to act as the first indoor heat exchanger as a condenser and the second indoor heat exchanger as an evaporator. In, the control device, the end of the cooling operation, the end mode determination means for determining whether the end of the dehumidifying operation, and at the end of the cooling operation, after performing the cycle dry operation for a predetermined time,
It is characterized in that it is provided with a drying operation control means for selecting a drying mode for performing a blowing operation for a predetermined time and selecting a drying operation mode for performing a blowing operation for a predetermined time at the end of the dehumidifying operation. An outlet for blowing air into the room, an inlet for sucking indoor air, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and between the first indoor heat exchanger and the second indoor heat exchanger An indoor unit that accommodates an intervening decompression device and that is provided with a control device that controls the indoor fan and the decompression device is provided. An air conditioner capable of controlling and performing cycle dry operation in which the first indoor heat exchanger acts as a condenser and the second indoor heat exchanger acts as an evaporator by increasing the throttle of the pressure reducing device. An end mode determining means for determining whether the cooling operation or the dehumidifying operation is ended, and at the end of the cooling operation, the cycle dry operation is performed for a predetermined time, and then the air blowing or heating operation is performed for a predetermined time A drying operation control means for selecting a drying mode and selecting a drying operation mode for performing a blowing operation or a heating operation for a predetermined time when the dehumidifying operation is finished is provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIGS. 1 is a sectional view of the indoor unit, FIG. 2 is a view showing a refrigeration cycle, and FIG.
4 is a control circuit diagram, FIG. 4 is a diagram showing a remote controller, FIG. 4 (a) is a plan view, FIG. 4 (b) is a diagram showing switching contents by a menu button, and FIG. 5 is a flowchart of basic control. FIG. 6 is a control block diagram, FIG. 7 is a flowchart at the time of the drying operation process, and FIG. 8 is a diagram showing a list of the operation states of each part in each operation mode.

2 and 3, the air conditioner 1 is
The outdoor unit 2 installed outdoors O and the indoor unit 3 installed in the room R for air conditioning, and the compressor 4 and the four-way valve 5 and the outdoor heat exchanger 6 installed in the outdoor unit 2 The outdoor expansion valve 7, which is an electric expansion valve whose opening can be finely controlled, and the indoor heat exchanger 8 provided in the indoor unit 3 are connected so as to form a refrigeration cycle,
The four-way valve 5 switches the refrigerant flow direction so that it flows in the solid arrow direction in the figure during the cooling operation or the dehumidifying operation, and in the dotted arrow direction in the figure during the heating operation. It can be done. In addition, the outdoor unit 2 includes a variable speed outdoor fan 9 that promotes heat exchange of the outdoor heat exchanger 6, and the indoor unit 3 includes a variable speed cross-flow fan that promotes heat exchange of the indoor heat exchanger 8. A fan 10 is provided.

Further, 11 is an inverter connected so as to make the operating frequency of the compressor 4 variable, and is connected to an AC power source 12 via a main switch 13. And
When performing cooling, heating, etc., the inverter 1
1 is controlled according to the indoor temperature load (difference between the room temperature of the room R and the set temperature), and the outdoor expansion valve 7, which is an electric expansion valve, has its opening controlled according to the refrigeration cycle state. There is. Although not shown in the figure, required power can be supplied from the AC power supply 12 to each part of the outdoor unit 2 and the indoor unit 3.

The indoor heat exchanger 8 has a rear heat exchange portion 8a and a front heat exchange portion 8 larger than the rear heat exchange portion 8a as shown in FIG.
and the rear side heat exchange section 8a and the front side heat exchange section 8b are connected via an indoor throttle valve 14 which is a two-way valve with a throttle, and controls the flow of the refrigerant between the two sides. It is possible. And the indoor throttle valve 14 used here
The two-way valve with a throttle is a valve whose opening can be controlled by electrical control, and is fully opened in the open state (when OFF: no throttle). During normal cooling operation and heating operation, this fully open valve is used. In addition, it is possible to control to a closed state (when ON: with throttle), for example, in a cycle dry operation or a dehumidifying operation described later, to a state having an appropriate throttle area.

The rear heat exchange section 8a and the front heat exchange section 8
b is a so-called fin tube heat exchanger, which is composed of a plurality of aluminum fins and a copper pipe penetrating the fins in a meandering manner. The area of the rear heat exchange portion 8a (area on the air suction side) is formed smaller than the area of the front heat exchange portion 8b (area on the air suction side).

Therefore, during the cycle dry operation and the dehumidifying operation, the indoor throttle valve 14 is closed with a throttle,
The outdoor expansion valve 7 between the outdoor heat exchanger 6 and the front heat exchanger 8b
By fully opening, the front side heat exchange section 8b serves as a condenser (reheater), the rear side heat exchange section 8a can act as an evaporator, and the air sucked into the indoor unit 3 is
Since it is heated by the front heat exchanger 8b and cooled by the rear heat exchanger 8a, the rear heat exchanger having a low temperature can be dehumidified at 8a. In addition, by appropriately controlling the opening degree (throttle amount) of the indoor throttle valve 14 during the dehumidifying operation, and controlling the blowing amount of the outdoor fan 9 and the rotation speed of the compressor 4, the air blown out from the indoor unit 3 can be controlled. The temperature can be finely adjusted.

Further, both units 2 and 3 are provided with an outdoor control unit 15 and an indoor control unit 16, respectively, in order to operate the refrigeration cycle according to the basic control flowchart shown in FIG. Both control units 15 and 16 are connected by a connection line 17. Then, the exchange of required control signals and data via the connection line 17 is performed by both control units 1.
5 and 16, and each unit in both units 2 and 3 connected to both control units 15 and 16 is operated.

The indoor control unit 16 includes an indoor unit 3
Instructions for operation start and operation by infrared signals transmitted from a wireless remote controller (hereinafter referred to as remote controller) 18 provided outside, room temperature and air volume set by the user, wind direction, and other settings related to operation A transmitter / receiver 19 for receiving contents and the like, and a room temperature sensor 20 composed of a thermistor for detecting the room temperature and humidity of the room R in air conditioning.
And a humidity sensor 21 made of ceramic are connected to the rear side heat exchange section 8a to detect an evaporation section temperature, and an evaporation section temperature sensor 22a provided to the front heat exchange section 8b to detect a condensation section temperature. Condensing part temperature sensor 22b
Are connected. It should be noted that the remote controller 18 is configured to transmit the room temperature, the driving condition, and the like from the transmitting / receiving unit 19 and display the content thereof.

On the other hand, the indoor unit 3 is installed on a wall Q near the ceiling of a room R for air conditioning as shown in FIG. 1, and is connected to the outdoor unit 2 through a wall opening (not shown) formed in the wall Q. , Are connected by a refrigerant pipe 23 provided with the connection line 17. Further, the indoor unit 3 has a front opening 25 that is largely opened in the front part and can be opened and closed by the front panel 24, an upper intake port 26 that opens upward in the upper part, and an air outlet 27 that opens downward in the lower part. Inside a body case 28 of a horizontally long casing, an indoor fan 10 is provided, in which a horizontally long lateral flow vane 29 whose axial direction is the longitudinal direction is rotationally driven by an indoor motor 30. Indoor motor 3
0 uses a DC motor that can switch speeds in multiple stages, has high efficiency, and has high stability even at low speeds, but an AC motor may be used.

Further, inside the body case 28 of the indoor unit 3, the front opening 25 and the upper suction port 26 through the air outlet 27 are provided.
Toward the main air passage 31 of the indoor fan 10
Are formed. Then, in the main flow passage 31, the indoor heat exchanger 8 having a width substantially the same as the width of the main body case 28 on the upstream side of the indoor fan 10 makes the front heat exchange portion 8 b face the front opening 25. And also the front heat exchange part 8b
The rear heat exchange portion 8a having a smaller height dimension is arranged so as to be connected to the upper portion of the front heat exchange portion 8b and to face the upper rear portion of the main body case 28. This time,
The front side heat exchange portion 8b formed in an arc shape is provided in the front drain pan 33 provided in the partition wall member 32 whose lower end edge constitutes the lower front wall portion of the main passage 31 with the convex side facing forward. Further, the rear side heat exchange section 8a is provided so that the lower end side edge thereof is located in the rear drain pan 35 provided on the back plate 34 which constitutes the rear wall portion of the main passage 31. . It should be noted that the room temperature sensor 20 and the humidity sensor 2 are provided in the main opening 31 between the front opening 25, the upper intake 26, and the front heat exchanger 8b, which are the inlets for the air in the room R of the indoor unit 3.
1 and 1 are provided.

Further, the front panel 24 for opening and closing the front opening 25 is an arc-shaped plate having no opening, and the panel motor 3
6, the panel drive mechanism 38 having, for example, a rack and pinion gear member 37 advances and retreats in the front-rear direction to perform an opening / closing operation to open or close the front opening 25. Then, during cooling, heating operation, dehumidifying operation, and drying operation, the front panel 23 is moved forward,
In this advanced state, the front opening 25 is opened to form a suction port, and the room air is sucked into the indoor unit 3. Further, the front panel 24 is retracted at the time of the blow drying operation, the heating drying operation or the stop, which will be described later, and in this retracted state, the front opening 25 is closed to prevent dust and dirt from entering the indoor unit 3. It has become.

The outlet 27 has a rear outlet louver 39a and a front outlet louver 39b which are slenderly formed in the left-right direction and whose left and right ends are pivotally supported by the rear louver motor 40a and the front louver motor 40b. The outlets 27 are provided so as to rotate in the vertical direction, respectively, and the outlet 27 can be opened and closed by rotating the rear outlet louver 39a and the front outlet louver 39b. Further, each of the motors 40a and 40b can be operated individually, and each of the blowout louvers 3 can be operated.
By independently rotating 9a and 39b according to the operation mode of the air conditioner 1 and opening / closing the air conditioner 1, the blowing direction of the conditioned air into the room R can be changed to the vertical direction. And
The outlet 27 is closed by rotating both the outlet louvers 39a and 39b in the closed direction.

The closing position X for closing the outlet 27
Both blow-out louvers 39a and 39b which were in a and Xb are adjusted to the operation mode of the air conditioner 1, and, for example, the rear blow-out louver 3 is used.
In 9a, the opening angle can be changed to the oblique downward position Ya and the direct downward position Za, and in the front blowing louver 39b, the opening angle can be changed to the slightly upward position Yb and the oblique downward position Zb, and also to the intermediate position therebetween. . Then, by changing the opening angle of both the blowout louvers 39a and 39b according to the operation mode, the blowing direction of the conditioned air from the indoor unit 3 into the room R can be made a desired direction.

Further, at the outlet 27, right and left louvers 41 are provided in the vicinity of the upstream sides of both the blowout louvers 39a and 39b so that the upper edges thereof are pivotally supported by the supporting member 42 and are rotatable in the left and right directions. There is. Then, by rotating the left and right louvers 41, the blowing direction of the conditioned air into the room R can be changed.

The indoor unit 3 has a front opening 25.
When viewed from the side, an electric dust collector 43 having a width dimension about half that of the front side heat exchange section 8b is attached to a position on the upper right side of the front side of the front side heat exchange section 8b of the indoor heat exchanger 8. This electrostatic precipitator 43 is adapted to perform a dust collecting operation by applying a high voltage generated by a high voltage power source 44 between a discharge electrode (not shown) provided inside and a dust collecting electrode.

On the other hand, in the outdoor control section 15 and the indoor control section 16 provided in the outdoor unit 2 and the indoor unit 3,
A microcomputer (C.P.
U) are provided for each of the C.I. P. The operation control described below is executed based on the contents programmed in U in advance or the contents set prior to the operation.

That is, the basic control of the operation performed by the outdoor control unit 15 and the indoor control unit 16 is as follows. First, in the first step S ₁ , according to the flowchart of FIG. 5 and the operation state of each unit of FIG. The main body 1 of the remote controller 18 of FIG.
The lid 18b that covers a part of 8a is opened, and an operation switching button 45 for selecting cooling, heating, dehumidification or automatic operation, a dehumidification button 46, a temperature button 47 for setting the room temperature, etc. are displayed on the display unit 18c made of liquid crystal or the like. The operation is performed while watching the contents displayed, and a desired operation mode is selected as in the known air conditioner.

Further, by operating the menu button 48, as shown in FIG.
As shown in (b), a cooling operation that switches cyclically each time the button is operated and a later-described operation mode that is selected and set after the dehumidifying operation are selected. The operation mode set here is a drying mode for performing a drying operation in the indoor unit 3,
A desired selection is made while observing the content displayed on the display section 18c, which mode without the selection mode is selected. When the operation mode is switched, the selected operation mode is displayed on the display unit 18c for a predetermined time, for example, 10 seconds.
It is displayed for a second to facilitate confirmation by the user.

Then, the operation button 49 for starting and stopping the operation of the air conditioner 1 is operated to close the main switch 13 to turn on the power and start the operation.

Subsequently, in the second step S ₂ , it is determined what the set operation mode is, and if it is the cooling mode, the cooling operation control of the third step S ₃ is performed. If it is the heating mode, the fourth step S 2 is performed. ₄ of the heating operation control, a dehumidifying operation control of the fifth step S ₅ if dehumidification mode, similarly to each omitted known air conditioner, as the operating state showing the respective portions in FIG. 8 deeds, in the sixth step S whether the operation has been completed in ₆ judgment is performed until done confirmation of the operation end. Then, the process proceeds to a seventh step S ₇ When the operation end is confirmed in the sixth step S _6.

[0029] Then at the seventh step S _7, immediately before the operation mode of whether the determination is made was a mode cooling or dehumidifying operation, if it is judged that not the cooling and dehumidifying operation, the eighth step proceeds to S _8, performs the operation end process is controlled in the stopped state showing the various parts in Fig. Also in the seventh step S _7, when it is determined that a cooling or dehumidifying operation, the process proceeds to a ninth step S _9.

[0030] Then, in a ninth step S _9, the cooling operation which is set in advance at the start of operation, the operation mode setting after the dehumidifying operation, the drying mode, a determination whether it is a no selection mode is performed. And if the drying mode is set, it executes the drying operation processing in the tenth step S _{1 0,} the process proceeds to an eighth step S ₈ after completed, the operation end process. Also in the case of no selection mode, it proceeds to an eighth step S _8, performs the operation end process.

Further, the remote controller 18 is provided with a dry button 50, which is operated by the user as needed, and although the flow chart is omitted, the dry operation process in the indoor unit 3 is performed by the above basic control. It is possible to force the execution separately.

Since the basic control as described above is performed, the air conditioner 1 can perform normal cooling operation, heating operation, and dehumidifying operation, and after the cooling operation or dehumidifying operation, The dry operation process described below can be performed by selecting and setting an operation mode in advance. In addition, since it is possible to select and set such an operation mode and not to select it, it is possible to deal with the case where there is a concern that the dry operation process will continue to be performed even if the operation is stopped. You can choose not to take any action.

The outdoor control unit 15 and the indoor control unit 16 are also provided.
6 is formed with a control block shown in FIG. 6 corresponding to the drying operation process. That is, 51 is a drying operation control means, which includes the room temperature sensor 2 provided in the indoor unit 3.
The difference between the room temperature Ta detected by 0 and the condensation part temperature Tc ₁ and the evaporation part temperature Tc ₂ detected by the condensation part temperature sensor 22b and the evaporation part temperature sensor 22a is the condensation part temperature difference detection means 52 and the evaporation part temperature difference detection. After being calculated by the means 53, the calculation result is input to the first operation end means 54 and the second operation end means, and further, the reference values K ₁ and K ₂ preset by the end means 53 and 54 are used. A comparison is made and the result is input.

Further, the dry operation control means 51 inputs a signal indicating whether or not the operation mode selected by the menu button 48 from the remote controller 18 is the dry mode, and the operation button 49.
The operation end instruction input from the operation drying instruction button 50 and the operation input of the drying operation execution from the operation drying button 50 are added, and the data of the operation mode of the air conditioner 1 immediately before is also input. It is supposed to be done. Then, the drying operation control means 51 outputs a control signal based on each input and preset control content to each component.

Under the drying operation control means 51, etc., the operation mode control of the drying operation process performed after the cooling operation or the dehumidifying operation is shown in the flowchart of FIG. 7 and the operation state of each part in FIG. Along the way.

First, in the first step T ₁ , the indoor control unit 16
The end mode determination means (not shown) provided in the, to determine whether the previous operation mode was the cooling operation,
A distinction is made between the cooling operation and the dehumidifying operation, and if it is the cooling operation, the process proceeds to the second step T ₂ . In the second step T _2, set to an operating state in the cycle dry operation showing the various parts in Fig. That is, the compressor 4 is fixed at a low speed to reduce the refrigerating capacity, and the outdoor fan 9
Is fixed at a low speed or a switching operation between low speed and stop, the indoor fan 10 is fixed at an extremely low speed lower than that during dehumidifying operation, the indoor throttle valve 14 is in a closed state with a throttle, the outdoor expansion valve 7 is in an open state, The valve 5 is set at a position for cooling.

Further, the front panel 24 of the indoor unit 3 is opened, and the front blow-out louver 39b is located at a slightly upward position Y.
b, the rear blowing louver 39a is set to the closed position Xa. As a result, the front opening 25 in which the front panel 24 is in the open state
The room air sucked into the indoor unit 3 with the air suction port as the suction port flows through the main passage 31 and mainly passes through the front side heat exchange section 8b of the indoor heat exchanger 8 and the indoor fan 1 and the outlet 27.
Is blown out slightly upward from the horizontal, and the indoor unit 3
The air flows in the vicinity and is immediately sucked into the indoor unit 3 again, and the front side heat exchange section 8b and the main passage 31 are mainly dried. The electrostatic precipitator 43 is in the OFF state.

Next, the third step T_ThreeThen, the condensing part temperature
The temperature T of the condensing part detected by the temperature sensor 22b and the room temperature sensor 20.
c₁Between room temperature and room temperature Ta (Tc₁-Ta) is calculated and calculated
The result is the preset first reference value K.₁Greater than
It is judged whether or not. And until it is judged to be large
When the comparison is continued and becomes large, the third step T _Three
End the fourth step T_FourMove to.

Subsequently, in a fourth step T ₄ , each part is set so as to be in the operating state in the blow drying operation shown in FIG. That is, the compressor 4 is stopped and the outdoor fan 9 is also stopped. Further, the indoor fan 10 is continuously operated at a lower speed than during dehumidification operation, for example, the rotation speed during dehumidification is 800.
When the speed is set to rpm, the speed is fixed to an extremely low speed of 500 rpm, the indoor throttle valve 14 is left open without throttling, the outdoor expansion valve 7 is left open as it is, and the four-way valve 5 is left at a position for cooling.

The front panel 24 of the indoor unit 3 is closed, and the front blow-out louver 39b is located in a slightly upward position Y.
b, the rear blowing louver 39a is set to the closed position Xa. As a result, the indoor air sucked into the indoor unit 3 with the upper suction port 26 as the suction port flows through the main flow passage 31, passes through the indoor heat exchanger 8 and the indoor fan 1, and is blown out from the outlet 27 from the horizontal direction. It is blown out slightly upward, flows in the vicinity of the indoor unit 3 and is sucked into the indoor unit 3 again, and both the rear side heat exchange section 8a and the front side heat exchange section 8b of the indoor heat exchanger 8 and the main flow passage 31 are provided. Dry inside. The electrostatic precipitator 43 is kept in the ON state.

Next, the fifth step T₅Then, the evaporation temperature
Temperature T detected by the sensor 22a and the room temperature sensor 20.
c_TwoBetween room temperature and room temperature Ta (Tc_Two-Ta) is calculated and calculated
The result is the preset second reference value K._TwoGreater than
It is judged whether or not. And until it is judged to be large
When the comparison is continued and becomes large, the fifth step T ₅
And complete the basic system shown in Fig. 5 based on the preset contents.
Eighth step S in the flowchart₈End of operation
Move to control contents of processing.

In the first step T ₁ , if the previous operation mode was dehumidifying operation, the fourth step T 1
₄ , and the following steps are performed to dry the inside of the indoor unit 3.

Such a dry operation process is a combination of a cycle dry operation which is a kind of dehumidifying operation in the first half and a blowing operation in the latter half, and the indoor unit is controlled by the cooling or dehumidifying operation in the previous operation mode. A large amount of drain water generated inside 3 is discharged to the outside through a drain hose (not shown), but part of the drain water is discharged to the front drain pan 33 or the rear drain pan 35 even after the cooling or dehumidifying operation is completed.
Or remains attached to the indoor heat exchanger 8 etc.,
After the cooling or dehumidifying operation is completed, the temperature inside the indoor unit 3 rises due to the invading indoor air, and the drain water starts to evaporate at a stretch,
As it is, the humidity inside the indoor unit 3 will reach close to 100%, so this is done to eliminate this, and it is intended to prevent a hot and humid breeding environment that is perfect for mold and other bacteria.

The drying operation process is executed so that the hot and humid condition inside the indoor unit 3 can be promptly resolved and the hot and humid air does not reach the user. That is, in the cycle dry operation as shown in FIG. 8, unlike the normal dehumidifying operation, the rotation speed of the compressor 4 is fixed at a low speed to reduce the refrigerating capacity, and the indoor fan 10 is set to an extremely low speed lower than that during the dehumidifying operation. The amount of air blown from the indoor fan 10 is reduced as much as possible. Further, the rear outlet louver 39a is closed, the front outlet louver 39b is opened, and the front outlet louver 3a is closed.
9b is set to be slightly upward and the front panel 24 is opened, so that blown air is not sent to the living area in the room R and returns to the indoor unit 3 again, which is a so-called short circuit operation. .

Further, the outdoor fan 9 is fixed at a low speed or is held in a switching state between a low speed and a stop, and the temperature of the front side heat exchange section 8b is raised to evaporate the water retained in the front side heat exchange section 8b. Furthermore, the temperature of the air flowing through the indoor unit 3 is increased to accelerate the evaporation of drain water inside the indoor unit 3, and the temperature of the indoor fan 10, the air outlet 27, and the louvers 39a, 39b, 41, etc. near the air outlet 27 are also increased. To prevent condensation. As a result, the moisture in the indoor unit rapidly evaporates, and the evaporated moisture in the indoor unit 3 is short-circuited to the rear heat exchange section 8a (evaporator).
It is condensed in and collected as drain water.

That is, in the cooling operation, since the indoor throttle valve 14 is in the open state, both the rear heat exchanger portion 8a and the front heat exchanger portion 8b act as an evaporator, and both heat exchange portions are operated. Moisture in the room air is condensed on the surfaces of the fins 8a and 8b. When the amount of condensed water increases, it flows down on the fin surface, falls to the drain pans 33 and 35 below both heat exchange parts 8a and 8b, and is discharged to the outside of the room. However, at the end of the cooling operation, a large amount of condensed water remains in both heat exchange parts 8a and 8b so that a large amount of condensed water is attached to the lower part of each.

Here, when the indoor throttle valve 14 is closed by the cycle dry operation, only the rear side heat exchange section 8a becomes an evaporator, the front side heat exchange section 8b becomes a condenser, and the front side heat exchange section 8b retains water. The condensed water that is being formed begins to evaporate. At this time, the water attached to the lower portion of the front heat exchange section 8b, which is difficult to dry in the next blast drying operation, also evaporates. Then, the evaporated water content is condensed again in the rear heat exchange section 8a.
Since the rear side heat exchange section 8a has a small area, the condensed water has a high density and smoothly falls to the rear drain pan 35,
It is discharged outdoors. As a result, at the end of the cycle dry operation, at least only the condensed water retained in the front heat exchange portion 8b can reduce the amount of moisture in the indoor unit 3. In addition, since the indoor fan operates at a lower speed during the cycle dry operation than during the dehumidifying operation, the effect of reducing the amount of water inside the indoor unit 3 is higher than that during the dehumidifying operation.

On the other hand, in the blast drying operation after the cycle dry operation, the water attached to the rear side heat exchange section 8a, which is an evaporator, cannot be completely removed only by the cycle dry operation. Therefore, the compressor 4 and the outdoor fan 9 are stopped, the indoor fan 10 is operated at an extremely low speed, and the front panel 24 is closed to close the front opening 25 of the indoor unit 3, and the dotted line in FIG. As shown by an arrow, the indoor air sucked into the indoor unit 3 with the upper suction port 26 as the suction port flows into the main flow passage 31, and the rear side of the indoor heat exchanger 8 provided immediately below the upper suction port 26. It flows so as to hit the heat exchanging portion 8a well, passes through the indoor fan 1 and is blown out slightly upward from the horizontal through the air outlet 27, flows near the indoor unit 3 and is sucked into the indoor unit 3 again, and the rear heat Both heat exchange parts 8a and 8b of the indoor heat exchanger 8 so that the exchange part 8a is well dried.
Then, the main flow path 31 is dried to sufficiently dry the inside of the indoor unit 3.

Regarding the time of the cycle dry operation, the condensing part temperature Tc ₁ detected by the condensing part temperature sensor 22b provided in the front side heat exchanging part 8b which is the condenser during the cycle dry operation and the room temperature sensor 20 are Room R detected
The difference (Tc ₁ −Ta) from the room temperature Ta in the inside is calculated by the condensation part temperature difference detection means 52, and the difference (T
It is the time until it is determined that c ₁ −Ta) has become larger than the preset first reference value K ₁ . On the other hand, with regard to the time of the blast drying operation, the evaporation section temperature Tc ₂ detected by the evaporation section temperature sensor 22a provided in the rear heat exchange section 8a which is the evaporator during the cycle dry operation,
Calculating the difference between the room temperature Ta of the room R to room temperature sensor 20 detects the _(Tc 2 -Ta) in the evaporation unit temperature difference detecting means 53, in the second operation ending means 55, the difference _(Tc 2 -Ta) in advance It is the time until it is determined that it has become larger than the set second reference value K ₂ .

This is because the temperature of the indoor heat exchanger 8 is low because heat is taken away by the latent heat of vaporization while the adhering moisture evaporates, and the adhering moisture completely evaporates, causing the indoor heat exchange. Focusing on the characteristic that the surface of the container 8 becomes higher when it is dried, the operating time is set to be an appropriate time based on this. The first reference value K ₁ is an appropriate value set in advance by experiments or the like with the water adhesion state of the front heat exchange section 8b, and the second reference value K ₂ is the rear heat exchange section 8a.
It is an appropriate value set in advance by experiments and the like with the water adhesion state.

Further, as for the cycle dry operation time, if the operation is performed for a long time until the moisture adhering to the front side heat exchange section 8b is completely evaporated, the evaporated water is sufficiently recovered in the rear side heat exchange section 8a. Therefore, in the subsequent blast drying operation, only the small amount of water remaining in the rear heat exchange section 8a is evaporated and blown out into the room R, whereby the release of humid air into the room R can be reduced and Unit 3
The inside can be fully dried. In addition, when the water adhering to the front side heat exchanging portion 8b is not completely evaporated by the short-time operation and a little remains, a small amount of water remaining in the front side heat exchanging portion 8b due to the subsequent blast drying operation and Moisture adhered to the side heat exchange section 8a is released into the room R, but part of it is after being discharged to the outside O at the rear side heat exchange section 8a of the evaporator.
Compared to the conventional drying operation in the indoor unit only by the air blowing operation or the heating operation, the humidity released to the room R can be reduced, and the time required for the drying operation processing is shorter than when the cycle dry operation is performed for a long time. it can.

As described above, in the drying operation process in which the cycle dry operation and the blast drying operation are combined, the indoor heat exchanger 8 is divided into two by the cycle dry operation, and one rear heat exchange section 8a is evaporated. The other front side heat exchange section 8b
Is applied to the condenser to suppress the wind speed by the indoor fan 10 and to prevent fresh indoor air from being sucked into the indoor unit 3 as much as possible.
The water inside the indoor unit 3 is evaporated so as to evaporate the attached water of b, and this is removed by the rear heat exchange section 8a which is an evaporator and drained to the outside of the room. The indoor unit 3 is caused to evaporate moisture adhering to the rear heat exchange section 8a by blowing air.
The internal humidity can be efficiently reduced in a short time. Further, in this operation, the air blown into the room R is mixed with the air that has passed through the evaporator and the air that has passed through the condenser, and since the adhering moisture has been sufficiently evaporated, the room R The humidity released inside can be reduced.

Further, the above-described drying operation processing in which the cycle dry operation and the blast drying operation are combined (hereinafter referred to as the first drying operation processing example) is one in which the blast drying operation is performed after the cycle dry operation. In the following, the operating state of each part in the heating and drying operation shown in FIG.
Another embodiment in which the cycle dry operation and the heating / drying operation described with reference to the flowchart of FIG.
The inside of the indoor unit 3 may be dried as in the second drying operation processing example).

That is, the control in the operation mode in the second drying operation processing embodiment is performed according to the flowchart of FIG. 7 and along the diagram showing the operating state of each part of FIG.
First, from the first step T ₁ to the third step T ₃ , the cycle dry operation is executed as in the first drying operation processing embodiment.

Subsequently, in a fourth step T ₄ , each part is set so as to be in the operating state in the heating and drying operation shown in FIG. That is, the compressor 4 is fixed at a low speed and the refrigerating capacity is lowered, the outdoor fan 9 is fixed at a low speed or a switching operation between low speed and stop is performed, and the indoor fan 10 is fixed at an extremely low speed lower than the dehumidifying operation, The indoor throttle valve 14 is placed in an open state without a throttle, the outdoor expansion valve 7 is placed in a state where the throttle amount is controlled by the cycle temperature, and the four-way valve 5 is placed in a position for heating.

The front panel 24 of the indoor unit 3 is closed, and the front blow-out louver 39b is located at a slightly upward position Y.
b, the rear blowing louver 39a is set to the closed position Xa. As a result, the indoor air sucked into the indoor unit 3 with the upper suction port 26 as the suction port flows through the main flow passage 31, passes through the indoor heat exchanger 8 and the indoor fan 1, and is blown out from the outlet 27 from the horizontal direction. It is blown out slightly upward, flows near the indoor unit 3 and is immediately sucked into the indoor unit 3 again, and the rear side heat exchange section 8a, the front side heat exchange section 8b, and the main passage 3
Dry within 1. The electrostatic precipitator 43 is in the OFF state.

Next, the fifth step T₅Then, the evaporation temperature
Temperature T detected by the sensor 22a and the room temperature sensor 20.
c_TwoBetween room temperature and room temperature Ta (Tc_Two-Ta) is calculated and calculated
The result is the preset second reference value K._TwoGreater than
It is judged whether or not. And until it is judged to be large
When the comparison is continued and becomes large, the fifth step T ₅
And complete the basic system shown in Fig. 5 based on the preset contents.
Eighth step S in the flowchart₈End of operation
Move to control contents of processing.

In the first step T ₁ , if the previous operation mode was the dehumidifying operation, the process directly goes to the fourth step T ₄ as in the case of the first drying operation processing embodiment, and the subsequent steps are performed. The above steps are executed to dry the indoor unit 3.

As a result, also in the second drying operation processing embodiment, the humidity inside the indoor unit 3 can be efficiently reduced in a short time in the same manner as in the first drying operation processing embodiment. The effect of being able to reduce the humidity released to

In the above embodiment, the drying operation process is continuously performed after the cooling operation and the dehumidifying operation. However, by operating the dry button 50 provided on the remote controller 18, cooling and heating are performed. In addition to the operation, the dehumidification operation, and the automatic operation, the above-described drying operation process that combines the cycle dry operation and blast drying operation, or the combination of the cycle dry operation and the heating / drying operation is performed.
It is possible to sequentially and compulsorily execute from the first step T1 according to the flowchart shown in FIG. As a result, the inside of the indoor unit 3 can be dried as needed at any time.

[0061]

As is apparent from the above description, according to the present invention, it is less likely that the occupant's comfort will be impaired by blowing out humid air into an air-conditioned room, and the room after cooling operation is stopped. The hot and humid condition inside the unit can be resolved within a relatively short time, the growth of bacteria and mold can be reduced, the offensive odor caused by the growth of mold and bacteria can be prevented, and a hygienic conditioned air is blown out. And other effects.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an indoor unit according to an embodiment of the present invention.

FIG. 2 is a diagram showing a refrigeration cycle in one embodiment of the present invention.

FIG. 3 is a control circuit diagram according to an embodiment of the present invention.

FIG. 4 is a diagram showing a remote controller according to an embodiment of the present invention, FIG. 4 (a) is a plan view, and FIG. 4 (b) is a diagram showing switching contents by a menu button.

FIG. 5 is a flowchart of basic control according to an embodiment of the present invention.

FIG. 6 is a control block diagram according to an embodiment of the present invention.

FIG. 7 is a flowchart at the time of a drying operation process according to the embodiment of the present invention.

FIG. 8 is a diagram showing a list of operation states of each unit in each operation mode according to the embodiment of the present invention.

[Explanation of symbols]

3 ... Indoor unit 8 ... Indoor heat exchanger 8a ... Rear heat exchange section 8b ... Front heat exchange section 10 ... Indoor fan 14 ... Indoor throttle valve 16 ... Indoor control unit 18 ... Remote controller 20 ... Room temperature sensor 22a ... Evaporator temperature sensor 22b ... Condensing part temperature sensor 25 ... Front opening 26 ... Upper suction port 27 ... Outlet 50 ... Dry button 51 ... Drying operation control means 52 ... Condenser temperature difference detecting means 53 ... Evaporator temperature difference detection means 54 ... First operation ending means 55 ... Second operation ending means

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Claims (14)

[Claims] 1. A blowout port for blowing air into a room, a suction port for sucking indoor air, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and the first indoor heat exchanger and the second indoor heat exchanger. While accommodating the decompression device interposed between the vessels,
An indoor unit provided with a control device for controlling the indoor fan and the pressure reducing device is provided, the cooling operation is performed, the indoor fan is controlled to a predetermined air volume, and the throttle of the pressure reducing device is increased to increase the first indoor heat exchange. In an air conditioner capable of a cycle dry operation in which the air conditioner functions as a condenser and the second indoor heat exchanger functions as an evaporator, the control device performs a predetermined time for the cycle dry operation and then performs a predetermined time for blowing operation. An air conditioner comprising a drying operation control means for performing a drying operation mode. 2. An outlet for blowing air into the room, an inlet for sucking indoor air, an indoor fan, a first indoor heat exchanger, a second indoor heat exchanger, and the first indoor heat exchanger and the second indoor heat exchanger. While accommodating the decompression device interposed between the vessels,
An indoor unit provided with a control device for controlling the indoor fan and the pressure reducing device is provided, and cooling and heating operations are performed, the indoor fan is controlled to have a predetermined air volume, and the throttle of the pressure reducing device is set to be large. In an air conditioner capable of performing cycle dry operation in which the heat exchanger acts as a condenser and the second indoor heat exchanger acts as an evaporator, the controller heats for a predetermined time after performing the cycle dry operation for a predetermined time. An air conditioner comprising a dry operation control means for operating. 3. The condensing section temperature detecting means for detecting the temperature of the first indoor heat exchanger, which serves as a condenser during the cycle dry operation, and the condensing section detected by the condensing section temperature detecting means. The air conditioner according to claim 1 or 2, further comprising a first operation ending unit that ends the cycle dry operation in a dry operation mode in accordance with a temperature. 4. The first operation termination means further detects a room temperature, and a condensation part temperature difference detection means for detecting a temperature difference between the condensation part temperature detected by the condensation part temperature detection means and the room temperature. 4. The method according to claim 3, wherein the first operation ending means ends the cycle dry operation in the drying operation mode based on the temperature difference detected by the condenser temperature difference detecting means. Air conditioner. 5. The drying operation control means includes an evaporation part temperature detecting means for detecting a temperature of a second indoor heat exchanger which is an evaporator during a cycle dry operation, and an evaporation part detected by the evaporation part temperature detecting means. The air conditioner according to any one of claims 1 to 4, further comprising a second operation ending unit that ends the blowing operation or the heating operation in the drying operation mode according to the temperature. 6. The second operation ending means further includes a room temperature detecting means for detecting room temperature and an evaporating portion temperature difference detecting means for detecting a temperature difference between the evaporating portion temperature detected by the evaporating portion temperature detecting means and the room temperature. And the second operation ending means ends the air blowing operation or the heating operation in the drying operation mode based on the temperature difference detected by the evaporator temperature difference detecting means. The air conditioner according to 5. 7. The air conditioner according to claim 4, wherein the cycle dry operation in the dry operation mode is ended when the difference between the condenser temperature and the room temperature becomes larger than a preset reference value. . 8. The drying operation control means includes an evaporation part temperature detection means for detecting a temperature of a second indoor heat exchanger which is an evaporator during a cycle dry operation, a room temperature detection means for detecting a room temperature, and an evaporation part temperature. Evaporator temperature difference detection means for detecting the temperature difference between the temperature of the evaporator and the room temperature detected by the detection means,
Further, the drying operation control means is for controlling the blowing operation duration time or the heating operation duration time in the drying operation mode based on the temperature difference detected by the evaporation part temperature difference detection means. The air conditioner according to claim 1 or claim 2. 9. The air conditioner according to any one of claims 1 to 8, wherein the cycle dry operation is automatically started after the cooling operation is completed. 10. The air conditioner further comprises a remote controller having a dry operation instruction button, and the cycle dry operation is started based on an operation of the dry operation instruction button. The air conditioner according to any one of 1. 11. An outlet for blowing air into a room, an inlet for sucking indoor air, an indoor fan, a first indoor heat exchanger,
A controller for accommodating a second indoor heat exchanger and a decompression device interposed between the first indoor heat exchanger and the second indoor heat exchanger, and controlling the indoor fan and the decompression device. A cycle dry in which the first indoor heat exchanger functions as a condenser and the second indoor heat exchanger functions as an evaporator by controlling a cooling operation, controlling the indoor fan to a predetermined air volume, and increasing the throttle of the pressure reducing device. When performing a drying operation of an indoor unit of an air conditioner that can be operated, a drying operation method of an indoor unit of an air conditioner, which comprises performing a blowing operation for a predetermined time after performing the cycle dry operation for a predetermined time. . 12. An outlet for blowing air into the room, an inlet for sucking indoor air, an indoor fan, a first indoor heat exchanger,
A controller for accommodating a second indoor heat exchanger and a decompression device interposed between the first indoor heat exchanger and the second indoor heat exchanger, and controlling the indoor fan and the decompression device. The air conditioner and the heating operation are controlled, the indoor fan is controlled to a predetermined air volume, and the decompression device has a large throttle to cause the first indoor heat exchanger to act as a condenser and the second indoor heat exchanger to act as an evaporator. When performing the drying operation of the indoor unit of the air conditioner capable of performing the cycle dry operation, after performing the cycle dry operation for a predetermined time, the heating operation is performed for a predetermined time, and the indoor unit of the air conditioner is dried. how to drive. 13. An outlet for blowing air into the room, an inlet for sucking indoor air, an indoor fan, a first indoor heat exchanger,
A controller for accommodating a second indoor heat exchanger and a decompression device interposed between the first indoor heat exchanger and the second indoor heat exchanger, and controlling the indoor fan and the decompression device. An indoor unit provided, cooling operation, dehumidification operation, controlling the indoor fan to a predetermined air volume, and increasing the throttle of the decompression device to make the first indoor heat exchanger a condenser,
In an air conditioner capable of performing cycle dry operation in which the second indoor heat exchanger acts as an evaporator, the control device determines an end mode determination means for determining whether the cooling operation or the dehumidifying operation is terminated. At the end of the cooling operation, after the cycle dry operation is performed for a predetermined time, a drying mode in which a blowing operation is performed for a predetermined time is selected, and when the dehumidifying operation is finished, a drying operation mode in which a ventilation operation is performed for a predetermined time is performed An air conditioner comprising a drying operation control means to be selected. 14. An air outlet for blowing air into a room, a suction port for sucking indoor air, an indoor fan, a first indoor heat exchanger,
A controller for accommodating a second indoor heat exchanger and a decompression device interposed between the first indoor heat exchanger and the second indoor heat exchanger, and controlling the indoor fan and the decompression device. An indoor unit is provided, cooling, heating operation, dehumidifying operation, controlling the indoor fan to a predetermined air volume, and increasing the throttle of the decompression device to make the first indoor heat exchanger a condenser, a second room. In an air conditioner capable of performing cycle dry operation in which a heat exchanger acts as an evaporator, the control device determines an end mode determining means for determining whether the cooling operation is finished or the dehumidifying operation is finished; At the end of the operation, after the cycle dry operation is performed for a predetermined time, a drying mode in which the air blowing or heating operation is performed for a predetermined time is selected, and at the end of the dehumidifying operation, the drying operation in which the air blowing or the heating operation is performed for a predetermined time is selected. An air conditioner characterized by comprising a drying operation control means for selecting a mode.