KR102194017B1 - Indoor unit and air conditioner comprising drain pump - Google Patents

Abstract

An air conditioner with a drain pump is provided. The air conditioner includes at least one indoor unit and an outdoor unit connected to the indoor unit. In this case, the indoor unit may include an indoor unit heat exchanger provided in the indoor unit; And a rotating body disposed between the indoor heat exchanger and the expansion valve. Meanwhile, the high-pressure refrigerant applied to the indoor unit is controlled to be reduced to a low-pressure refrigerant through the rotating body and the indoor heat exchanger, thereby providing a refrigerant-powered indoor unit capable of minimizing power input to a drain pump.

Description

An air conditioner equipped with a drain pump TECHNICAL FIELD [INDOOR UNIT AND AIR CONDITIONER COMPRISING DRAIN PUMP}

The present invention relates to an indoor unit provided with a drain pump. More specifically, it relates to an indoor unit including a drain pump, an air conditioner, and a control method thereof.

An air conditioner is a refrigeration cycle applied to condition air, and as a background technology of the present invention, referring to Japanese Unexamined Patent Publication No. 2009-092378 and Japanese Unexamined Patent Application Publication No. 2004-020189, a separate air conditioner It may include an outdoor unit installed outdoors, and an indoor unit installed indoors.

The outdoor unit may include a compressor, an outdoor heat exchanger, and an outdoor fan, and when the compressor is driven, refrigerant may flow to the outdoor heat exchanger and condensate in the outdoor heat exchanger.

The indoor unit may include an indoor heat exchanger and an indoor fan, and the refrigerant may be evaporated in the indoor heat exchanger, and the air flowed by the indoor fan may be cooled by the indoor heat exchanger and then discharged into the room.

When the air conditioner includes a four-way valve, it may be composed of a heat pump type air conditioner capable of switching between a cooling operation and a heating operation according to the flow direction of the refrigerant.

The air conditioner may include a plurality of indoor units.

In the air conditioner, a plurality of indoor units are connected to the distributor and the outdoor unit is connected to the distributor to be connected to a plurality of indoor units through the distributor. As described above, in the air conditioner including the distributor, some of the plurality of indoor units are different from among the plurality of indoor units during cooling operation. The indoor unit may be a simultaneous air conditioner in which heating is operated.

On the other hand, in the air conditioner, the outdoor unit may be connected to a plurality of indoor units through a liquid pipe and an engine, and in this case, all of the indoor units in operation among the plurality of indoor units may be configured as a switchable air conditioner operated by a cooling operation or a heating operation. have.

Meanwhile, the air conditioner is structurally divided into a separate type in which a compressor is disposed outdoors and an integral type in which a compressor is integrally manufactured.

In the separate type, an indoor heat exchanger is installed in an indoor unit, and an outdoor heat exchanger and a compressor are installed in the outdoor unit to connect the two separate devices with a refrigerant pipe.

In the integrated type, an indoor heat exchanger, an outdoor heat exchanger, and a compressor are installed in one case. There are a window-type air conditioner that is installed directly by hanging a device on a window as an integrated air conditioner, and a duct-type air conditioner that is installed outside the room by connecting the suction duct and the discharge duct.

In general, the separate air conditioners are classified according to the installation type of the indoor unit.

When the indoor unit is installed vertically in an indoor space, it is called a stand-type air conditioner, when the indoor unit is installed on the wall of the room is called a wall-mounted air conditioner, and when the indoor unit is installed on the ceiling, it is called a ceiling type indoor unit.

In addition, as a type of separate air conditioner, there is a system air conditioner capable of providing air-conditioned air to a plurality of spaces.

In the case of a system air conditioner, there are a type in which a plurality of indoor units are provided to air-condition the room, and a type in which air-conditioned air is supplied to each space through a duct.

A plurality of indoor units provided in the system air conditioner may be provided with a stand type, a wall-mounted type, or a ceiling type.

In the case of the ceiling indoor unit, condensed water generated by the indoor heat exchanger may be stored inside the case.

Meanwhile, since the drain pump installed in the indoor unit operates the drain pump when the condensate is above a certain level, there is a problem that efficiency decreases because power consumption that is not actually used for cooling is used for the drain pump operation.

On the other hand, in order to reduce power consumption, there is a method of reducing power of a compressor by mounting a component corresponding to an expander in an expansion section to obtain rotational force. However, when the expander is used as described above, there is a problem that it is difficult to use it in an actual air conditioner because operation of the compressor is limited.

In order to solve the above problems, the present invention proposes an air conditioner having a refrigerant-powered indoor unit drain pump.

In addition, the present invention proposes a method of reducing power consumption of a drain pump by utilizing a pressure drop for cooling in an indoor unit.

An air conditioner having a drain pump according to the present invention is provided. The air conditioner includes at least one indoor unit and an outdoor unit connected to the indoor unit. In this case, the indoor unit may include an indoor unit heat exchanger provided in the indoor unit; And a rotating body disposed between the indoor heat exchanger and the expansion valve. Meanwhile, the high-pressure refrigerant applied to the indoor unit is controlled to be reduced to a low-pressure refrigerant through the rotating body and the indoor heat exchanger, thereby providing a refrigerant-powered indoor unit capable of minimizing power input to a drain pump. To this end, a control unit provided in the air conditioner may control the high-pressure refrigerant applied to the indoor unit to be reduced to a low-pressure refrigerant through the rotating body and the indoor heat exchanger.

In one embodiment, the indoor unit includes first and second indoor units, and the first and second indoor units include first and second indoor heat exchangers, respectively. In this case, the high-temperature and high-pressure liquid applied to the first and second indoor units is depressurized to a low-temperature, low-pressure gas through the first and second indoor heat exchangers, and may be input together through an input valve of the outdoor unit. To this end, the controller may control the high-temperature and high-pressure liquid applied to the first and second indoor units to be reduced to low-temperature, low-pressure gas through the first and second indoor heat exchangers and input together to an input valve of the outdoor unit.

In one embodiment, the high-pressure refrigerant applied to the indoor unit is not depressurized through the expansion valve, but may be decompressed to a low-pressure refrigerant through the rotating body.

In one embodiment, the rotating body, the internal rotating body; And an external rotating body configured to be rotatably coupled with the internal rotating body. In this case, the control unit may rotate the external rotating body using the internal rotating body and a magnet mounted on the external rotating body.

In an embodiment, when the air conditioner is in a heating operation, a rotor blade provided in the internal rotating body may be folded in a direction opposite to the direction of the wing during cooling operation in order to prevent reverse rotation of the air conditioner. To this end, the controller may control the air conditioner to be folded in a direction opposite to the direction of the blades during cooling operation in order to prevent reverse rotation of the rotor blades provided in the internal rotating body when the air conditioner is in heating operation.

In one embodiment, it may further include a drain pump connected through the rotating body and the gear. In this case, condensed water may be discharged to the outside through a drain pan in the drain pump.

In one embodiment, the gear includes a first gear connected to the rotating body and a second gear connected to the drain pump. In this case, the first and second gears are vertically coupled to each other to operate, and the number and gear ratio of the first and second gears may be determined according to RPM required for the drain pump.

In one embodiment, a drain pump may be provided, characterized in that the rotation direction of the rotor blades is changed according to a refrigerant flow direction and an operation mode of the refrigerant passing through the rotor.

In an embodiment, when the air conditioner is in a heating operation, a rotation direction of the rotor blade may be set to a direction opposite to a rotation direction during a cooling operation.

In an embodiment, the controller may be configured to control the operation of the outdoor unit. In this case, the control unit may sense a first temperature and a first pressure of the first low temperature low pressure gas depressurized through the first indoor heat exchanger. In addition, the second temperature and the second pressure of the second low-temperature low-pressure gas reduced through the second indoor heat exchanger may be sensed.

In an embodiment, if the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold, the first pressure and the The outdoor unit may be controlled to operate only an indoor unit corresponding to a low pressure among the second pressures.

In an embodiment, if the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold, the first pressure and the Among the second pressures, the refrigerant flow rate of the refrigerant passing through the rotating body provided in the indoor unit corresponding to the high pressure may be controlled to increase.

The technical effect of an air conditioner having a refrigerant-powered indoor unit drain pump according to the present invention will be described as follows.

According to at least one embodiment of the present invention, it is possible to provide an air conditioner including a refrigerant-powered indoor unit drain pump capable of minimizing power input to the drain pump, and a control method thereof.

Further, according to at least one embodiment of the present invention, there is an advantage that condensed water can be easily discharged to the outside while reducing power consumption of the drain pump by utilizing a pressure drop for cooling in the indoor unit.

Further scope of applicability of the present invention will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, specific embodiments such as the detailed description and preferred embodiments of the present invention should be understood as being given by way of example only.

1 shows a detailed configuration of an indoor unit in an air conditioner having at least one indoor unit and an outdoor unit according to the present invention.
2 shows a detailed configuration of an outdoor unit in an air conditioner having at least one indoor unit and an outdoor unit according to the present invention.
3 shows a refrigerant diagram in the air conditioner according to the present invention.
4 is a side view and a power transmission conceptual diagram of a detailed configuration of a rotating body according to the present invention.
5 is a conceptual diagram showing the principle of rotation according to the flow of refrigerant applied to the rotating body according to the present invention.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used interchangeably in consideration of only the ease of preparation of the specification, and do not have meanings or roles that are distinguished from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and all modifications included in the spirit and scope of the present invention It should be understood to include equivalents or substitutes.

Hereinafter, a drain pump of an air conditioner according to the present invention and an air conditioner including the same will be described. In this regard, FIG. 1 shows a detailed configuration of an indoor unit in an air conditioner including at least one indoor unit and an outdoor unit according to the present invention. Meanwhile, FIG. 2 shows a detailed configuration of an outdoor unit in an air conditioner including at least one indoor unit and an outdoor unit according to the present invention.

1 and 2, an air conditioner includes one or more indoor units 100 and outdoor units 200. Meanwhile, the indoor unit 100 includes a first indoor unit 110 and a second indoor unit 120. In this case, the first indoor unit 110 and the second indoor unit 120 include a first indoor heat exchanger 111 and a second indoor heat exchanger 112, respectively.

Meanwhile, the indoor unit 100 includes indoor unit heat exchangers 111 and 112 provided in the indoor unit 100 and rotating bodies 120 and 130 disposed between the indoor heat exchangers 111 and 112 and the expansion valve EEV. Include.

Meanwhile, the high-temperature and high-pressure liquid applied to the first indoor unit 110 and the second indoor unit 120 is reduced to a low-temperature, low-pressure gas through the first indoor heat exchanger 111 and the second indoor heat exchanger 112. Accordingly, the low-temperature and low-pressure gas decompressed through the first indoor heat exchanger 111 and the second indoor heat exchanger 112 is input together to the input valve of the outdoor unit 200.

More specifically, the high-pressure refrigerant applied to the indoor unit 100 is not depressurized through the expansion valve EEV, but is decompressed to the low-pressure refrigerant through the rotating bodies 120 and 130.

Meanwhile, a high-temperature high-pressure gas and a high-temperature high-pressure gas may exist in the outdoor unit 200 in addition to the low-temperature low-pressure gas.

2, the low-temperature and low-pressure gas decompressed through the first indoor heat exchanger 111 and the second indoor heat exchanger 112 is an outdoor unit through a flare joint of the first indoor unit 110 and the second indoor unit 120. It flows into 200. The low-temperature low-pressure gas introduced into the outdoor unit 200 is converted into high-temperature high-pressure gas through the first and second inverter compressors. Meanwhile, the high-temperature and high-pressure gas is converted into a high-temperature and high-pressure liquid through a heat exchanger.

Meanwhile, the high-temperature and high-pressure liquid flows into the first indoor unit 110 and the second indoor unit 120 from the outdoor unit 200 through expansion valves (EEV) and a plurality of expansion valves at the top and bottom.

Meanwhile, the operating principle of the air conditioner having the refrigerant power drain pump according to the present invention is as follows.

-In the refrigeration cycle, the expansion side decompresses through a fine tube, converts the high-pressure refrigerant into a low-pressure, low-temperature state, and delivers it to the evaporator.

-The heat exchanger and air exchange heat, and moisture in the air is condensed.

-To prevent condensate from accumulating in the product and overflowing, a pump (ex: drain pump) is installed to discharge the condensed water to the outside.

-The motor of the drain pump can be operated by supplying power from the indoor unit, but it does not have a motor to reduce power consumption, and a separate power means can be used.

Meanwhile, FIG. 3 shows a refrigerant diagram in the air conditioner according to the present invention. The refrigerant diagram as shown in FIG. 3 shows the pressure (P) according to the enthalpy h. Referring to FIG. 3, it can be seen that the high-pressure refrigerant is reduced to a low-pressure refrigerant while maintaining the same enthalpy from A to B. Accordingly, in the present invention, the high-pressure refrigerant applied to the indoor unit 100 may be reduced to a low-pressure refrigerant while maintaining the same enthalpy from A to B on the refrigerant diagram of FIG. 3 through the rotating bodies 120 and 130. In this way, when the pressure is reduced to a low-pressure refrigerant while maintaining the same enthalpy from A to B on the refrigerant diagram, there is an advantage that power input (power consumption) to the drain pump in the indoor unit 100 can be minimized.

Accordingly, in the present invention, in decompressing the high-pressure refrigerant applied to the indoor unit 100 to the low-pressure refrigerant through the rotating bodies 120 and 130, there is a technical feature of utilizing the pressure strengthening of the cycle generated during the cooling operation.

In this regard, FIGS. 4 and 5 show a detailed configuration of a rotating body according to the present invention and a configuration connected to the rotating body and the motor. More specifically, FIG. 4 is a side view and a power transmission conceptual diagram of a detailed configuration of a rotating body according to the present invention. Meanwhile, FIG. 5 is a conceptual diagram showing a rotation principle according to a refrigerant flow applied to a rotating body according to the present invention.

Referring to FIGS. 1, 4 and 5, the rotating body 120 includes an internal rotating body 121 and an external rotating body 122 configured to be rotatably coupled with the internal rotating body 121. Here, the external rotating body 122 may not rotate by itself, but may be configured to transmit the rotational force of the internal rotating body 121.

In this regard, the external rotating body 122 may be rotated using the inner rotating body 121 and the magnet 123 mounted on the external rotating body 122. Meanwhile, as shown in FIG. 5, the magnet 123 may be provided in both the inner rotor 121 and the outer rotor 122 and may be configured to operate in combination with each other.

In this regard, the rotating body 120 may be rotated by allowing the refrigerant to flow through the passage 124 in which the rotating body 120 is mounted. Specifically, the internal rotating body 121 may be rotated by allowing the refrigerant to flow through the passage 124 in which the internal rotating body 121 is mounted. In this regard, the refrigerant flow may be set to 1000 kg/h, but is not limited thereto and may be changed according to the application.

Meanwhile, a method for controlling rotation of a drain pump of an air conditioner according to the present invention has the following technical characteristics.

1) A refrigerant aberration type rotating body 120 is mounted between the expansion valve (EEV) of the indoor unit 100 and the heat exchangers 111 and 112 to rotate the rotating body 120 with the flow of the refrigerant.

2) The external rotating body 122 may be operated using the magnet 123 mounted on the rotating body 120. In this regard, magnetic force is used without connecting the shaft directly to maintain the seal.

3) Operate the drain pump with the rotating force to discharge the condensed water from the drain pan to the outside.

4) The number of gears can be adjusted to suit the required RPM of the pump.

Meanwhile, the operation of the drain pump during the cooling/heating operation of the air conditioner according to the present invention has the following technical characteristics.

1) In cooling operation, the indoor unit heat exchanger needs a pressure drop from the low-pressure, low-temperature, high-pressure refrigerant to the low-pressure refrigerant.

2) In order to reduce the pressure with a low-pressure refrigerant, the pressure reduced through the expansion valve (EEV) installed in the indoor unit 100 is reduced through the rotating body 120.

3) The drain pump is operated so that the external pump rotating body, that is, the drain pump, is operated by magnetic force through the magnet 123 of the rotating body 120.

4) In heating operation, make sure that the rotor blades are folded to the opposite side to prevent reverse rotation.

Accordingly, when the air conditioner is in a heating operation, the rotor blades provided in the inner rotor 121 may be controlled to be folded in a direction opposite to the direction of the blades during cooling operation in order to prevent reverse rotation.

On the other hand, the refrigerant power drain pump of the present invention can be extended to a range in which a rotational force is generated by using a pressure difference in an expanding section of a refrigerant cycle and the force is used by a drain pump or electricity storage. In this regard, a specific method of generating a rotational force is as follows.

-EEV method that rotates the internal axis by external electromagnetic force can be used.

-By attaching a magnet to the inner rotating shaft, you can obtain rotational force by rotating the outer shaft.

Meanwhile, referring to FIG. 5, the air conditioner further includes a drain pump 126 connected through a rotating body 120 and a gear 125. In this case, it is possible to control the condensed water to be discharged to the outside through the drain pan in the drain pump 126.

Meanwhile, the gear 125 includes a first gear 125a connected to the rotating body 120 and a second gear 125b connected to the drain pump 126. At this time, the first gear 125a and the second gear 125b are vertically coupled to each other and operate, and the number and gear ratio of the first gear 125a and the second gear 125b are determined by the drain pump 126. It can be determined according to the required RPM. As shown in FIG. 5, the first gear 125a and the second gear 125b may be configured to be vertically coupled to each other to operate.

Accordingly, the air conditioner having the refrigerant power drain pump according to the present invention has the advantage that condensed water can be discharged to the outside through the refrigerant power rotating body 120 without a separate drive device such as a motor or the like in the drain pump.

Specifically, it is necessary to substantially increase the number of gears of the first gear 125a and the second gear 125b according to the maximum RPM required for the drain pump 126. To this end, rotation angles q1 and q2 of the first gear 125a and the second gear 125b may be variably controlled according to the RPM currently required for the drain pump 126.

In this regard, Table 1 shows the gear rotation speed expected when the outdoor unit of the air conditioner according to the present invention is operated. In this case, the rotation speed can be calculated as shown in Table 1 according to the expected rotation speed when the outdoor unit is operated with 20 horsepower.

Item unit value Mass flow kg/h 1015 density kg/㎥ 1015 Volume flow ㎥/h One ㎥/m 0.017 ㎥/s 0.000278 Cross-sectional area ㎡ 0.000052 Flow rate m/s 5.36 Rotating body diameter m 0.050 Rotation speed RPM 1024

On the other hand, when the amount of condensate to be discharged through the drain pump 126 is not large or the distance at which the condensate is condensed is close, the rotation angles (q1, q2) of the first gear 125a and the second gear 125b are reduced. Can be controlled. Accordingly, there is an advantage in that the condensed water can be quickly discharged when the amount of condensed water to be discharged through the drain pump 126 is not large or the distance at which the condensed water is condensed is close.

In this regard, the distance at which the condensed water is condensed may be set as a distance from the condensed water to the drain pump in consideration of external discharge of the condensed water. On the other hand, whether or not the amount of condensed water is large may be set based on the amount of condensed water to be discharged to the outside.

On the other hand, when the amount of condensate to be discharged through the drain pump 126 is large or the distance at which the condensate is condensed is long, the rotation angles (q1, q2) of the first gear 125a and the second gear 125b are increased. Can be controlled. Accordingly, when the condensed water to be discharged through the drain pump 126 is large or the distance at which the condensed water is condensed is long, the condensed water can be easily discharged.

Meanwhile, according to the drain pump and the driving method thereof according to the present invention, the rotation direction of the blades of the rotor 120 may be changed according to the flow direction of the refrigerant passing through the rotation body 120 and the operation mode. Specifically, when the air conditioner is in a heating operation, a rotation direction of the rotor blade may be opposite to a rotation direction during a cooling operation.

Meanwhile, referring to FIG. 1, an air conditioner having a drain pump according to the present invention may further include a controller 300 for controlling the operation of the outdoor unit 200. In this regard, referring to FIGS. 1, 2, and 5, the controller 300 may control the indoor unit 100 and the outdoor unit 200 and parts provided therein so that the specific operation as described above is performed. Specifically, the controller 300 may control the high-pressure refrigerant applied to the indoor unit 100 to be reduced to a low-pressure refrigerant through the rotating body 120 and the indoor heat exchanger 110. Accordingly, it is possible to provide a refrigerant-powered indoor unit capable of minimizing the input of power to the drain pump.

In addition, when the air conditioner is in a heating operation, the controller 300 may control the rotors 120 and 130 so that the rotational direction of the rotor blades is opposite to the rotational direction during cooling operation.

Meanwhile, the controller 300 may sense a first temperature and a first pressure of the first gas depressurized through the first indoor heat exchanger 111. Here, the first gas is a gas having low temperature and low pressure characteristics, and may be referred to as a first low temperature and low pressure gas.

In addition, the controller 300 may sense a second temperature and a second pressure of the second low-temperature low-pressure gas depressurized through the second indoor heat exchanger 121. Here, the second low temperature low pressure gas is a gas having a low temperature low pressure characteristic, and may be referred to as a second low temperature low pressure gas.

Accordingly, when the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to the second threshold, the controller 300 only controls a specific indoor unit in a low pressure state. You can control it to work. Specifically, when the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold, the controller 300 Among the 2 pressures, the outdoor unit may be controlled to operate only the indoor unit corresponding to the low pressure.

Further, if the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold, the controller 300 determines that the specific indoor unit in a high-pressure state It can be controlled to be. Specifically, when the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold, the controller 300 Among the second pressures, the refrigerant flow rate of the refrigerant passing through the rotating body provided in the indoor unit corresponding to the high pressure may be increased.

In the above, an air conditioner having a refrigerant-powered indoor unit drain pump according to the present invention has been described.

Therefore, the technical effect of the air conditioner having the refrigerant-powered indoor unit drain pump according to the present invention will be described as follows.

According to at least one embodiment of the present invention, it is possible to provide an air conditioner including a refrigerant-powered indoor unit drain pump capable of minimizing power input to the drain pump, and a control method thereof.

Further, according to at least one embodiment of the present invention, there is an advantage that condensed water can be easily discharged to the outside while reducing power consumption of the drain pump by utilizing a pressure drop for cooling in the indoor unit.

Further scope of applicability of the present invention will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the present invention can be clearly understood by those skilled in the art, specific embodiments such as the detailed description and preferred embodiments of the present invention should be understood as being given by way of example only.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Further, the features, structures, effects, etc. illustrated in each embodiment may be implemented by combining or modifying other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Accordingly, contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are only examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention belongs are illustrated above within the scope not departing from the essential characteristics of the present embodiment. It will be seen that various modifications and applications that are not available are possible. For example, each component specifically shown in the embodiment can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (12)

In an air conditioner having a drain pump,
Indoor unit;
Outdoor unit;
The indoor unit,
An indoor heat exchanger provided in the indoor unit;
A rotating body disposed between the indoor heat exchanger and the expansion valve; And
The rotating body is mounted and includes a passage through which high-pressure refrigerant applied to the indoor unit flows,
The high pressure refrigerant is reduced to a low pressure refrigerant through the rotating body and the indoor heat exchanger,
The rotating body,
An inner rotor formed in an aberration method including a plurality of rotor blades to rotate according to the flow of the refrigerant; And
It is formed to be rotated, and includes an external rotating body configured to transmit a rotational force of the internal rotating body coupled and coupled to the internal rotating body,
The external rotating body is connected to the drain pump through a gear,
The drain pump,
An air conditioner having a drain pump, characterized in that it is driven by the rotational force of the internal rotating body transmitted through the external rotating body, and discharges condensed water to the outside through a drain pan. The method of claim 1,
The indoor unit includes first and second indoor units, and the first and second indoor units are provided with first and second indoor heat exchangers, respectively,
The high-temperature and high-pressure liquid applied to the first and second indoor units is reduced to a low-temperature, low-pressure gas through the first and second indoor heat exchangers, and is input together to an input valve of the outdoor unit, comprising a drain pump. Air conditioner. The method of claim 1,
An air conditioner having a drain pump, characterized in that the high-pressure refrigerant applied to the indoor unit is not depressurized through the expansion valve but is depressurized to a low-pressure refrigerant through the rotating body. The method of claim 3,
An air conditioner having a drain pump, characterized in that rotating the external rotating body by using the internal rotating body and a magnet mounted on the external rotating body. The method of claim 4,
When the air conditioner is in heating operation,
The rotor blade is an air conditioner having a drain pump, characterized in that the air conditioner is folded in a direction opposite to the direction of the blade during cooling operation in order to prevent reverse rotation. delete The method of claim 1,
The gear includes a first gear connected to the internal rotating body and a second gear connected to the drain pump,
The first and second gears are vertically coupled to each other and operate, and the number of gears and the gear ratio of the first and second gears are determined according to the RPM required for the drain pump. Air conditioner. The method of claim 5,
An air conditioner having a drain pump, characterized in that the rotation direction of the rotor blades is changed according to a refrigerant flow direction and an operation mode of the refrigerant passing through the rotor. The method of claim 8,
An air conditioner having a drain pump, characterized in that the rotational direction of the rotor blades when the air conditioner is in a heating operation is opposite to a rotational direction in a cooling operation. The method of claim 2,
Further comprising a control unit for controlling the operation of the outdoor unit,
The control unit,
Sensing a first temperature and a first pressure of the first low temperature low pressure gas depressurized through the first indoor heat exchanger,
An air conditioner having a drain pump, characterized in that sensing a second temperature and a second pressure of the second low temperature low pressure gas reduced through the second indoor heat exchanger. The method of claim 10,
The control unit,
If the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold,
And controlling the outdoor unit to operate only an indoor unit corresponding to a low pressure among the first pressure and the second pressure. The method of claim 10,
The control unit,
If the difference between the first temperature and the second temperature is greater than or equal to a first threshold, and the difference between the first pressure and the second pressure is greater than or equal to a second threshold,
An air conditioner with a drain pump, characterized in that increasing a refrigerant flow rate of a refrigerant passing through a rotating body provided in an indoor unit corresponding to a high pressure among the first pressure and the second pressure.

Images