KR20100128771A - Air conditioner and the control method - Google Patents

Abstract

PURPOSE: An air-conditioner and a control method thereof are provided to cleanly maintain a storage unit by the removal of water remaining in the storage unit which supplies water to a humidifying device. CONSTITUTION: An air-conditioner comprises a air supply fan, an air exhaust fan, a humidifying unit(70), a drainpipe(87), a feed check valve(84), a drain check valve(88), and a controller. The air supply fan and the air exhaust fan are formed in an air supply flow passage and an air exhaust flow passage for ventilation. The humidifying unit comprises a storing unit(80) and a humidifying device(72). The storing unit selectively receives water from the water service pipe and stores the water. The humidifying device connects to the storing unit and supplies moisture to outdoor air flowing into a room. The drainpipe connects to the storing unit of the humidifying unit. The feed check valve is formed in the water service pipe to control the supply of water.

Description

Air Conditioner and Control Method {AIR CONDITIONER AND THE CONTROL METHOD}

The present invention relates to an air conditioner that maintains indoor air in a comfortable state by adjusting a certain space to a temperature, humidity, and air flow distribution suitable for human activity.

In general, an air conditioner uses a heating or condensation heat of a refrigerant to transfer a low temperature heat source to a high temperature or a high temperature heat source to a low temperature, an air purifier that cleans contaminated air to fresh air, and an indoor / outdoor air to each other. It is divided into the ventilation device to be replaced.

An air conditioner is a device that cools or heats an indoor space by using heat absorbing or absorbing heat when the refrigerant changes phase. Compressor, condenser, expansion valve and evaporator constituting a cooling cycle Is provided.

An air purifier is a device that sucks indoor air to remove foreign substances such as dust and supplies purified air back to the room. The air purifier sucks contaminated air into a fan and collects fine dust or bacteria by a filter. Deodorizes body odor or tobacco smell.

Ventilation equipment is a device that exchanges indoor and outdoor air to discharge pollutants and odors of indoor air to the outside and introduce fresh air into the room. Such ventilation device can mitigate these effects by exchanging temperature and humidity between outdoor air and indoor air when the outdoor air is inflowed, if there is a large difference in temperature and humidity between indoor and outdoor. It is provided with a heat exchange element.

Recently, the air conditioner has various additional functions such as an air purifying function and a humidification (or 'dehumidification') function to filter the polluted air outside and indoors and to supply it to the indoor space in addition to cooling and heating the indoor space.

However, when a humidifier unit that performs a humidification mode function is added to the air conditioner to provide moisture to outdoor air supplied to the room, water is stored in the humidification unit even when the humidification mode is stopped.

In general, the humidifier element provided in the humidification unit is a property of the material and function of decay due to moisture and propagation of bacteria well, water is provided in the humidification unit is provided in the storage unit for supplying water to the humidification element, the storage unit There was a problem that fungi or bacteria were introduced into the humidifier and introduced into the room.

In addition, since the humidifying unit stores limited water, it is necessary to periodically replenish water. In general, the humidifying unit is installed on a ceiling, and thus, it is difficult to replenish water.

An object of the present invention is to provide an air conditioner for removing residual water remaining in the humidification unit when the humidification function is stopped when the humidification function is performed together with indoor ventilation.

Still another object of the present invention is to provide an air conditioner in which water is automatically supplied to a humidifying unit.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

According to a feature of the present invention for achieving the object as described above, the present invention is provided in the air supply path for the outdoor air is introduced into the room and the exhaust path for the indoor air is discharged to the outdoor air supply fan and An exhaust fan; A humidifying unit having a storage unit for selectively receiving and storing water from a water pipe and a humidifying element connected to the storage unit to supply water to outdoor air introduced into the room; A drain pipe connected to the storage unit of the humidifying unit to selectively drain the water stored in the storage unit; A water supply check valve provided at the water pipe to control water supply; A drain check valve provided in the drain pipe to selectively drain the water stored in the storage unit; When the humidification operation mode for supplying moisture to the air while the air supply fan flows is stopped, the water supply check valve is controlled to block the water supplied to the storage unit, and the drain check valve is controlled to control the water stored in the storage unit. It provides an air conditioner comprising a control unit for draining.

According to another feature of the present invention for achieving the object as described above, the present invention is provided in each of the air supply path for the outdoor air is introduced into the room and the exhaust path for the indoor air is discharged to the outdoor air supply fan for ventilating the indoor air And an exhaust fan; A humidifying unit having a storage unit for selectively receiving and storing water from a water pipe and a humidifying element connected to the storage unit to supply water to outdoor air introduced into the room; A drain pipe connected to the storage unit of the humidifying unit to selectively drain the water stored in the storage unit; A water supply check valve provided at the water pipe to control water supply; A drain check valve provided in the drain pipe to selectively drain the water stored in the storage unit; When the power supplied to the air supply fan is cut off the air is further configured to control the water supply check valve to block the water supplied to the storage unit and to control the drainage check valve to drain the water stored in the storage unit Provide a harmonizer.

And, the storage unit further comprises a float switch for opening and closing the water supply check valve in accordance with the water level.

The apparatus may further include a drain pan provided at a lower portion of the humidifying unit to discharge water passing through the humidifying element and water drained to the drain pipe to the outside.

The water supply check valve and the drain check valve are each composed of a solenoid valve that controls the opening and closing of the valve by magnetic force.

According to another feature of the present invention for achieving the above object, the present invention comprises the steps of performing a ventilation mode for ventilating indoor air; A supply step of receiving water from the water pipe; A humidification step of performing a humidification operation mode for supplying moisture to outdoor air introduced into the room; Provided is a control method of an air conditioner including a removing step of removing stored water for humidification.

The removing step may include a water supply blocking step of blocking water supply from the water pipe; And a drainage step of draining the stored water to moisturize the outdoor air.

The water supply blocking step and the draining step are performed when the humidification operation mode is finished.

The water supply blocking step and the draining step are performed when the power supply is cut off and the ventilation mode is stopped.

According to another feature of the present invention for achieving the above object, the present invention comprises the steps of performing a ventilation mode for ventilating indoor air; A supply step of receiving water from the water pipe; A humidification step of performing a humidification operation mode for supplying moisture to outdoor air introduced into the room; Blocking step of blocking the water supplied to the storage unit of the humidification unit when the humidification operation mode is stopped; When the water supplied to the storage unit is blocked, it provides a control method of the air conditioner comprising opening the drain pipe connected to the storage unit to drain the water stored in the storage unit.

Shut off of the water supplied to the reservoir and the drainage of the water stored in the reservoir are controlled by solenoid valves, respectively.

According to the present invention, when the power supply is cut off or the humidification operation mode is stopped, all the remaining portions of the reservoir for supplying water to the humidifying element are removed so that the reservoir is kept clean. It is effective to keep the air flowing into the room clean.

In addition, according to the present invention, the humidifying unit is connected to the water pipe, and a check valve is provided between the humidifying unit and the water pipe to control the water supply, thereby increasing user convenience.

Hereinafter, a preferred embodiment of an air conditioner according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the configuration of a preferred embodiment of an air conditioner according to the present invention.

As shown in this figure, the air conditioner includes an air supply fan 40 and an exhaust fan 42 for flowing air in the housing 10, a regenerative heat exchange unit 50 for exchanging outdoor air and indoor air. , A cooling and heating unit 50 for cooling or heating the air introduced into the room, and a humidifying unit 70 for supplying moisture to the air.

The air conditioner may be operated in a ventilation mode for ventilating indoor air, a cooling and heating mode for cooling or heating outdoor air introduced into a room, and a humidification operation mode for providing moisture to outdoor air entering the room.

The housing 10 is provided with a control box 12 having a control unit 100 for controlling the overall operation of the air conditioner (see FIG. 3). The control unit 100 is generated by the air conditioning unit 60. It is provided to control the operation of the air supply fan 40 to remove the condensed water or the moisture of the humidifying unit 70. In addition, the control unit 100 is configured to control the water supply check valve 84 and the drainage check valve 88. The detailed configuration of the control unit 100 will be described later.

The housing 10 is formed in an empty rectangular parallelepiped shape, and the air supply fan 40, the exhaust fan 42, the regenerative heat exchange unit 50, the humidification unit 70, and the like inside the housing 10. Is provided. The housing 10 includes an air supply passage 20 and an exhaust passage 30 by the partition panel 14.

 The air supply passage 20 forms a path through which the outdoor air flows into the room, and the exhaust path 30 forms a path through which the indoor air is discharged to the outside. The air supply passage 20 and the exhaust passage 30 are provided to partially cross each other.

One side of the housing 20 is provided with an outdoor air outlet 22 forming a part of the air supply passage 20 and an indoor air inlet 32 forming a portion of the exhaust passage 30.

The outdoor air outlet 22 serves as an outlet of outdoor air introduced into the room from the air supply passage 20, and the indoor air inlet 32 serves as an inlet of indoor air discharged from the exhaust passage 30 to the outside. Play a role. The outdoor air outlet 22 and the indoor air inlet 32 are provided adjacent to the indoor side.

The other side of the housing 20 is provided with an outdoor air inlet 24 forming a part of the air supply passage 20 and an indoor air outlet 34 forming a part of the exhaust passage 30.

The outdoor air inlet 24 is an entrance area of the outdoor air introduced into the room from the air supply passage 20, and the indoor air discharge inlet 34 of the indoor air discharged to the outside from the exhaust passage 30. Act as an exit The outdoor air outlet 22 and the indoor air inlet 32 are provided adjacent to the outdoor side.

The air supply fan 40 is provided on the air supply passage 20 to guide the outdoor air to the interior, and the exhaust fan 42 is provided on the exhaust flow passage 30 to guide the indoor air to the outdoor. Ventilate the air.

That is, the air supply fan 40 forcibly sucks outdoor air from the outside to supply the indoor air, and the exhaust fan 42 forcibly sucks contaminated air in the room and discharges it to the outdoor.

As such, the fresh outdoor air is introduced into the room, and the air is discharged to the outside.

A regenerative heat exchange unit 50 is provided in the region where the air supply passage 20 and the exhaust passage 30 cross each other. The regenerative heat exchange unit 50 is generally formed in a square pillar shape having a rectangular cross section. The regenerative heat exchange unit 50 serves to exchange the humidity and heat energy of the outdoor air introduced into the room and the indoor air discharged to the outside.

That is, the regenerative heat exchange unit 50 allows each air having a temperature and humidity difference to flow in different passages, thereby allowing moisture and sensible heat to exchange latent heat by a high-efficiency heat exchange membrane forming layers of different passages. Follow the principle of electrothermal exchange by heat exchanging.

In more detail, the regenerative heat exchange unit 50 has a flow path of air through the side facing each other of the four sides of the cube. The air flow passage comprises a plurality of air supply passages (not shown) in communication with the air supply passage 20 and a plurality of exhaust passages (not shown) in communication with the exhaust passage 30, the air supply passage and exhaust passages Neighbors are orthogonal.

Therefore, the outdoor air and the indoor air passing through the regenerative heat exchange unit 50 exchange heat while passing through the air supply passage and the exhaust passage, respectively, and the outdoor air is introduced into the room while having a temperature close to the room temperature. In the regenerative heat exchange unit 50, partition sheets (not shown) are provided between the exhaust passages through which the indoor air passes and the air supply passages through which the outdoor air passes.

The partition sheet exchanges moisture and thermal energy of outdoor air and indoor air, and serves to block materials such as carbon dioxide and dust from being interchanged. Therefore, the fresh outdoor air absorbs the moisture and heat energy of the indoor air discharged to the outside and enters the indoor, and the dust contained in the indoor air is discharged to the outside as it is.

The regenerative heat exchange unit 50 may be provided with a filter (not shown). The filter has a filtration function to filter foreign substances contained in the air, and is preferably detachably provided at both sides of the regenerative heat exchange unit 50.

That is, the regenerative heat exchange unit 50 filters foreign substances mixed with external air to increase cleanliness of the air supplied to the room, and protects the regenerative heat exchange unit 50 from foreign substances to extend the life.

The regenerative heat exchange unit 50 may be provided with a clean filter (not shown) for filtering out dust particles in the sucked outside air and removing odors in the air.

In addition, the housing 10 is provided with a cooling and heating unit (60). The air conditioning unit 60 serves to cool or heat air introduced into the room through the regenerative heat exchange unit 50.

The air conditioning unit 60 may be configured to be connected to a cooling and heating device (air conditioner, etc.) that absorbs heat or emits heat around by using a phase change of the refrigerant. For example, the air conditioning unit 60 may be configured as a heat exchanger used as an evaporator or a condenser such as an air conditioner, and the air conditioning unit 60 may be connected to an outdoor unit such as an air conditioner to receive a refrigerant.

The cooling and heating unit 60 may be configured to provide only a cooling or heating function according to design conditions, and when the cooling and heating unit 60 performs only a function of heating outdoor air, the cooling and heating unit 60 may be configured as a heater by electric resistance. have.

2 is a conceptual diagram showing the configuration of the humidifying unit in the embodiment of the present invention.

As shown in this figure, the humidifying unit 70 is connected to receive water from the water pipe (86). The humidifying unit 70 serves to supply moisture to the air flowing into the room through the cooling and heating unit 60.

The humidifying unit 70 is provided with a humidifying element 72 positioned on the air supply passage 20 to supply moisture to outdoor air introduced into the room. The humidifying element 72 is provided with a material that sucks moisture using a capillary phenomenon. The humidifying element 72 is configured to include a body portion 74, the suction portion 76 and the vaporization portion 78.

The suction part 76 is a part which is immersed in water of the storage part 80 to draw up moisture, and the vaporization part 78 is provided to have a large surface area on the air supply passage 20 to supply moisture to air. That's the part. The body portion 74, the suction portion 76 and the vaporization portion 78 are partitioned for convenience of description and are not clearly distinguished in practical function.

The reservoir 80 is connected to the water pipe 86 for transporting water. The storage unit 80 has a space in which water is stored. The storage unit 80 stores water to supply moisture to the humidifying element 72.

The storage unit 80 is provided with a float switch 82. The float switch 82 is for detecting the liquid level of the fluid and serves to adjust the amount of water stored in the storage unit 80.

The float switch 82 is configured to float on the surface by buoyancy so that when the water level is lowered to fall vertically to operate the switch. The float switch 82 is configured to control the water supply check valve 84 to selectively block the supply of water.

The water supply check valve 84 is provided in the water pipe 86 to adjust the opening degree of the water pipe 86. That is, the water supply check valve 84 serves to adjust the amount of water introduced into the storage unit 80 through the water pipe 86.

The water supply check valve 84 is connected to the float switch 82 receives a control signal. That is, the water supply check valve 84 adjusts the opening degree of the water supply check valve 84 according to a control signal of the float switch 82 that detects the water level of the storage 80. Adjust the amount of water supplied to the

The water supply check valve 84 is also opened and closed by the control unit 100. When the water supply check valve 84 stops the power supply and the ventilation function is stopped, or when the humidification function of the humidification unit 70 is stopped, the water supply pipe 86 is closed to allow water to be stored in the storage unit 80. Do not supply.

In addition, the humidifying unit 70 is provided with a drain pipe (87). The drain pipe 87 is connected to the storage unit 80 of the humidifying unit 70 serves to selectively drain the water stored in the storage unit 80. The drain pipe 87 is provided on the bottom of the storage unit 80 and extends downward.

The drain pipe 87 is provided with a drain check valve 88. The drain check valve 88 selectively opens the drain pipe 87 to drain the water stored in the reservoir 80. The drain check valve 88 is opened and closed by the control unit 100.

When the power supply is blocked and the ventilation function is stopped or the humidification function of the humidification unit 70 is stopped, the drain check valve 88 opens the drain pipe 87 to store the water stored in the storage unit 80. Drain.

The water supply check valve 84 and the drain check valve 88 is preferably composed of a solenoid valve for controlling the opening and closing of the valve by the magnetic force. The solenoid valve is configured to open the valve and shut off electricity when the magnetic force is generated in the solenoid to shut off the valve by the force of the spring when the magnetic force is lost or vice versa.

A drain pan 90 is provided below the humidifying unit 70. The drain pan 90 is provided in the lower portion of the humidifying unit 70 collects the water generated in the humidification element 72 and the water drained to the drain pipe 87 to discharge to the outside.

The drain pan 90 is preferably installed below the humidifying element 72 and the air conditioning unit 60 to collect condensate generated in the air conditioning unit 60. The drain pan 90 is provided with a drain 92 for discharging the water collected in the drain pan 90 to the outside.

3 is a block diagram showing a control configuration of the embodiment of the present invention.

As shown in this figure, the control unit 100 for controlling the operation of the air conditioner serves to control the operating state of each component by detecting a change in the operating environment inside the air conditioner.

The controller 100 is electrically connected to the air supply fan 40, the exhaust fan 42, and the air conditioning unit 60 to control the operation of each component. In addition, the controller 100 is electrically connected to the water supply check valve 84 and the drain check valve 88 to control the opening and closing operation of the valve. As described above, the water supply check valve 84 may also be connected to the float switch 82 to control the opening and closing according to the water level stored in the storage 80.

When the operation of the humidifying unit 70 is stopped, the controller 100 controls the water supply check valve 84 to block water supplied to the storage unit 80 and to control the drain check valve 88. To drain the water stored in the reservoir 80.

In addition, the controller 100 controls the water supply check valve 84 to block the water supplied to the storage unit 80 when the power supplied to the air supply fan 40 is cut off due to a power failure, and the drain check. The valve 88 is controlled to drain the water stored in the reservoir 80.

Hereinafter, the operation of the preferred embodiment of the air conditioner according to the present invention having the configuration as described above in detail.

4 is an explanatory view showing the flow of air in the ventilation mode of the embodiment of the present invention.

First, when indoor air is somewhat contaminated, when power is applied to the exhaust fan 42, indoor air flows into the exhaust flow path 30 through the indoor air inlet 32, and the exhaust flow path 30 Indoor air passing through) passes through the regenerative heat exchange unit 50 in a diagonal direction.

For reference, an arrow A indicated by a dotted line indicates a flow trace of indoor air discharged to the outside, and an arrow B indicated by a solid line indicates a flow trace of outdoor air introduced into the room.

In addition, the indoor air passing through the regenerative heat exchange unit 50 flows along the exhaust flow path 30, and then is discharged to the outside through the indoor air outlet 34.

At the same time, when power is applied to the air supply fan 40, outdoor air flows into the air supply passage 20 through the outdoor air inlet 24, and the outdoor air passing through the air supply passage 30 is The regenerative heat exchange unit 50 crosses in a diagonal direction.

The outdoor air passing through the regenerative heat exchange unit 50 flows along the air supply passage 20, and then is supplied to the room through the outdoor air outlet 22.

Through this process, the indoor air and the outdoor air passing through the regenerative heat exchange unit 50 are mutually heat exchanged so that outdoor air having an appropriate temperature is supplied to the room.

In this case, when a cooling mode or a heating mode is selected, the air conditioning unit 60 provided on the air supply passage 20 cools or heats outdoor air introduced into the room to provide cool air or warm air to the room. do.

Hereinafter, a humidification operation mode for supplying moisture to the outdoor air introduced into the room and a process of removing water from the storage unit 80 by turning off the power supply or canceling the humidification operation mode will be described.

5 is a flowchart illustrating a process of removing moisture remaining in the storage unit when the power supply is cut off in the embodiment of the present invention, and FIG. 6 illustrates moisture remaining in the storage unit when the humidification mode is stopped in the embodiment of the present invention. A flowchart showing the process of removal is shown.

In the case of an emergency in which the power supply is cut off, or in the case where the humidification mode is artificially stopped, the process of removing the residual water in the storage unit is almost the same. Therefore, both cases will be described together.

When power is supplied to the air conditioner to perform a ventilation function (s101 and s201), the air supply fan 40 and the exhaust fan 42 are operated. (S102, s202) The air supply fan 40 is operated from the outside. The outdoor air is forcibly sucked and supplied to the room, and the exhaust fan 42 forcibly sucks the polluted air from the room and discharges it to the outside.

When the air conditioner is set to the humidification operation mode (s103 and s203), the controller 100 opens the water supply check valve 84 to supply water to the storage 80. When a certain amount of water is filled in the reservoir 80, the float switch 82 sends a control signal to the water supply check valve 84 to block water from being supplied to the reservoir 80.

At the same time, the control unit 100 closes the drain check valve 88 of the drain pipe 87 to control the water of the storage unit 80 not to be drained. (S104, s204)

At this time, the suction unit 72 of the humidifying element 72 absorbs water from the storage unit 80 to supply water to the vaporization unit 78. The outdoor air introduced into the room by the air supply fan 40 passes through the vaporization unit 78 and the humidity increases.

That is, the outdoor dry air absorbs the moisture of the vaporization unit 78 to maintain an appropriate humidity. The moisture of the vaporization unit 78 which is not absorbed by outdoor air is collected by the drain pan 90 and discharged to the outside.

When the power supply is interrupted by a power failure while the humidification operation mode is performed, the operation of the air supply fan 40 and the exhaust fan 42 is stopped, and water remains in the storage 80. s105)

When the air supply fan 40 is stopped and no flow of air occurs, evaporation of moisture does not occur well in the humidifying element 72, and water in the storage unit 80 remains as it is.

The humidifying element 72 provided in the humidifying unit 70 is a decay of bacteria and propagation of bacteria due to the properties of the material and function well, so that the humidifying unit 70 is secured to ensure durability and reliability of the action. It is desirable to shut off the water supply when not in operation. Therefore, when the operation of the humidifying unit 70 is stopped, the water of the storage unit 80 to which the humidifying element 72 is connected should be removed.

In addition, even when the power supply is not cut off, when the humidification operation mode is released, the water of the storage unit 80 is removed.

To this end, the control unit 100 closes the water supply check valve 84 at the time of power failure to block the water supplied to the storage unit 80, and opens the drainage check valve 88 to open the storage unit 80. Drain the remaining water in (s106, s206).

By such a process, the water of the storage unit 80 is collected in the drain pan 90 and discharged to the outside, and almost no water remains in the storage unit 80. As such, when the power supply is interrupted, the control unit 100 removes all the water from the storage unit 80 to prevent bacteria and the like from breeding and contaminating the storage unit 80 and the humidification element 72. do.

When the ventilation is completed and the indoor air is maintained at a constant humidity to stop the ventilation (s207), the operation of the air supply fan 40 and the exhaust fan 42 is stopped.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self-evident.

1 is a perspective view showing the configuration of a preferred embodiment of an air conditioner according to the present invention.

Figure 2 is a conceptual diagram showing the configuration of the humidifying unit in the embodiment of the present invention.

3 is a block diagram showing a control configuration of an embodiment of the present invention.

4 is an explanatory view showing a flow of air in the ventilation mode of the embodiment of the present invention.

5 is a flowchart illustrating a process of removing moisture remaining in the storage unit when the power supply is cut in the embodiment of the present invention.

6 is a flowchart illustrating a process of removing moisture remaining in the storage unit when the humidification mode is stopped in the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: housing 12: control box

14: compartment panel 20: air supply passage

22: Outdoor air outlet 24: Outdoor air inlet

30: exhaust passage 32: indoor air inlet

34: indoor air outlet 40: air supply fan

42: exhaust fan 50: regenerative heat exchange unit

60: air conditioning unit 70: humidification unit

72: humidifier 74: body

76: suction part 78: vaporization part

80: storage 82: float switch

84: water supply check valve 86: water pipe

87: drain pipe 88: drain check valve

90: drain pan 92: drain

Claims (11)

An air supply fan and an exhaust fan provided in each of an air supply path through which outdoor air is introduced into the indoor air and an exhaust path through which indoor air is discharged to the outside; A humidifying unit having a storage unit for selectively receiving and storing water from a water pipe and a humidifying element connected to the storage unit to supply water to outdoor air introduced into the room; A drain pipe connected to the storage unit of the humidifying unit to selectively drain the water stored in the storage unit; A water supply check valve provided at the water pipe to control water supply; A drain check valve provided in the drain pipe to selectively drain the water stored in the storage unit; When the humidification operation mode for supplying moisture to the air while the air supply fan flows is stopped, the water supply check valve is controlled to block the water supplied to the storage unit, and the drain check valve is controlled to control the water stored in the storage unit. An air conditioner comprising a control unit for draining the water. An air supply fan and an exhaust fan provided in each of an air supply path through which outdoor air is introduced into the indoor air and an exhaust path through which indoor air is discharged to the outside; A humidifying unit having a storage unit for selectively receiving and storing water from a water pipe and a humidifying element connected to the storage unit to supply water to outdoor air introduced into the room; A drain pipe connected to the storage unit of the humidifying unit to selectively drain the water stored in the storage unit; A water supply check valve provided at the water pipe to control water supply; A drain check valve provided in the drain pipe to selectively drain the water stored in the storage unit; When the power supplied to the air supply fan is cut off the air is further configured to control the water supply check valve to block the water supplied to the storage unit and to control the drainage check valve to drain the water stored in the storage unit Conditioner. The method according to claim 1 or 2, And a float switch provided in the storage unit to open and close the water supply check valve according to the water level. The method of claim 3, wherein And a drain pan provided at a lower portion of the humidifying unit to discharge water passing through the humidifying element and water drained to the drain pipe to the outside. The method of claim 3, wherein The water supply check valve and the drain check valve are air conditioners, characterized in that each consisting of a solenoid valve for controlling the opening and closing of the valve by a magnetic force. Performing a ventilation mode for ventilating indoor air; A supply step of receiving water from the water pipe; A humidification step of performing a humidification operation mode for supplying moisture to outdoor air introduced into the room; A control method of an air conditioner comprising a removing step of removing stored water for humidification. The method of claim 6, The removing step, A water supply blocking step of blocking water supply from the water pipe; And a drainage step of draining the stored water to supply water to the outdoor air. The method of claim 7, wherein And the water supply blocking step and the draining step are performed when the humidification operation mode is terminated. The method of claim 7, wherein And the water supply blocking step and the draining step are performed when power supply is cut off and the ventilation mode is stopped. Performing a ventilation mode for ventilating indoor air; A supply step of receiving water from the water pipe; A humidification step of performing a humidification operation mode for supplying moisture to outdoor air introduced into the room; Blocking step of blocking the water supplied to the storage unit of the humidification unit when the humidification operation mode is stopped; When the water supplied to the storage unit is blocked, the control method of the air conditioner comprising the step of opening the drain pipe connected to the storage unit to drain the water stored in the storage unit. The method of claim 10, The control method of the air conditioner, characterized in that the blocking of the water supplied to the storage unit and the drainage of the water stored in the storage unit is controlled by a solenoid valve, respectively.

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