KR100865144B1 - Air conditioner and driving method thereof - Google Patents

Abstract

The air conditioner of the present invention includes a first compression unit and a second compression unit for compressing a refrigerant, an outdoor side heat exchanger provided in an outdoor unit and connected to the first and second compression units, and an indoor unit. And an indoor heat exchanger connected to the two compression units and the outdoor heat exchanger, and refrigerant guide means for guiding (adjusting) the refrigerant flow by selectively connecting the first compression unit and the second compression unit in series or in parallel. It is configured by. In addition, by selectively connecting the first and second compression units in parallel or in series, the capacity of the first and second compression units can be changed as well as the manufacturing cost can be minimized.

Description

Air conditioner and its operation method {AIR CONDITIONER AND DRIVING METHOD THEREOF}

The present invention relates to an air conditioner and a method of operating the same, and more particularly, to an air conditioner and a method of operating the same so that the capacity can be changed according to the change of the room temperature and the manufacturing cost can be minimized.

An air-conditioner keeps the room in a comfortable state by keeping the room temperature at a set state.

Air conditioners generally comprise a refrigeration cycle system. The refrigeration cycle system includes a compressor for compressing a refrigerant, a condenser for releasing heat to the outside while the refrigerant compressed in the compressor is condensed, an expansion valve for reducing the pressure of the refrigerant condensed in the condenser, and the expansion valve. It is configured to include an evaporator that absorbs external heat while the refrigerant evaporates.

The compressor, condenser, expansion valve and evaporator are connected by a connecting tube to form a cycle.

As the refrigeration cycle system is powered and the compressor is operated, the high temperature and high pressure refrigerant discharged from the compressor is sequentially passed through the condenser, the expansion valve, and the evaporator, and then sucked into the compressor, and the same process is repeated. In the above process, the condenser generates heat and absorbs external heat from the evaporator to form cold air. The heat generated from the condenser and the cold air formed in the evaporator are selectively circulated and flowed into the room to keep the room in a comfortable state.

On the other hand, the air conditioner is implemented in various forms according to the installation conditions. For example, an air conditioner is equipped with all of the refrigeration cycle systems in one casing and is provided with an air duct and a blowing fan inside the casing. Such air conditioners are usually installed in the windows constituting the room in order to keep a relatively small room in a comfortable state.

In another example, the air conditioner is composed of an indoor unit and an outdoor unit. The indoor unit includes a heat exchanger that serves as an evaporator for cooling, and the outdoor unit includes a heat exchanger and a compressor that serves as a condenser for cooling. The indoor unit is installed indoors and the outdoor unit is installed outdoors.

As another example, the air conditioner is composed of one outdoor unit and a plurality of indoor units respectively connected to the outdoor unit and installed in the plurality of rooms. The compressor mounted on the outdoor unit has a large capacity, or two compressors mounted on the outdoor unit.

Generally, a compressor converts electrical energy into kinetic energy and compresses the refrigerant by the kinetic energy. The compressor includes a motor generating a driving force and a compression mechanism receiving the driving force of the motor to compress the refrigerant. In addition, there are various types of rotary compressors, scroll compressors, reciprocal compressors, etc. according to the compression mechanism for compressing the refrigerant.

Among these compressors, rotary compressors and scroll compressors are mainly used in air conditioners.

On the other hand, the most important factor in the process of researching and manufacturing the air conditioner as described above is to minimize the manufacturing cost and to minimize the energy consumption during operation of the air conditioner in order to increase the competitiveness of the product.

In particular, as the price of oil increases due to the recent increase in the amount of oil used worldwide, research and development of an air conditioner capable of minimizing power consumption has emerged as a very important task. And minimizing the power consumption of the air conditioner to minimize the cause of environmental problems.

On the other hand, the condition for operating the air conditioner so as to minimize the power consumption of the air conditioner is to operate the air conditioner according to the load of the indoor space where the air conditioner is installed, that is, the temperature condition. That is, when the temperature of the room rises sharply, the air conditioner is operated to generate a lot of cool air according to the excessive temperature change (excessive load) in order to maintain the set room temperature. In this case, the air conditioner is operated so that little cold air is generated to maintain the set room temperature.

One of the factors for satisfying such conditions is to control the amount of refrigerant discharged from the compressor, which is the main component for operating the refrigeration cycle system.

One of the methods of controlling the discharge capacity of the refrigerant discharged from the compressor is to apply an inverter motor capable of varying the number of rotations of the drive motor constituting the compressor. The discharge flow rate of the refrigerant discharged from the compressor is controlled by adjusting the rotation speed of the driving motor of the compressor according to the change of the condition of the room where the air conditioner is installed. The amount of heat and cold air generated in the condenser and the evaporator is adjusted according to the change in the discharge flow rate discharged from the compressor.

However, when the drive motor of the compressor is applied as an inverter motor, the price of the inverter motor becomes very expensive, thereby increasing the unit price of the product, which has a disadvantage in that the price competitiveness is reduced.

Therefore, it is required to adjust the discharge flow rate of the refrigerant compressed by the compressor while applying a general constant speed motor without a control drive to the compressor to vary the capacity of the air conditioner according to the room temperature condition in which the air conditioner is installed.

[Technical Challenges]

The present invention has been made in view of the above-mentioned point, and an object of the present invention is not only to change the capacity according to the change of the room temperature, but also to minimize the manufacturing cost of the air conditioner and its operating method In providing.

[Technical Solution]

In order to achieve the object of the present invention as described above, a first compression unit and a second compression unit for compressing the refrigerant, and an outdoor side heat exchanger which is provided with an outdoor unit and connected to the first and second compression units, And an indoor heat exchanger connected to the first and second compression units and the outdoor heat exchanger, and selectively connecting the first and second compression units in series or in parallel to continuously connect the first and second compression units in the first and second compression units. And a refrigerant guide means for guiding (adjusting) the refrigerant flow path to compress and discharge the refrigerant or to compress and discharge the refrigerant in the first and second compression units, respectively.

Further, in a method of operating an air conditioner having a first compression unit and a second compression unit for compressing refrigerant, respectively, starting the operation of the air conditioner and selecting a saving mode or a power mode according to the set conditions. Controlling the flow of the refrigerant in a series relationship such that the refrigerant is compressed in the first compression unit in the saving mode and then compressed in the second compression unit in the saving mode; A method of operating an air conditioner is provided, comprising the step of controlling the flow of refrigerant in a parallel relationship so as to be respectively compressed in the second compression unit.

1 is a piping diagram showing a first embodiment of an air conditioner of the present invention;

2 is a piping diagram showing a second embodiment of the air conditioner of the present invention;

3 is a flowchart illustrating a method of operating an air conditioner of the present invention;

4 and 5 are piping views showing an operating state in the power mode and the saving mode of the first embodiment of the air conditioner of the present invention, respectively;

6 and 7 are piping views each showing an operating state in the power mode and the saving mode of the second embodiment of the air conditioner of the present invention.

<Description of the symbols for the main parts of the drawings>

100; Indoor side heat exchanger 200; Outdoor side heat exchanger

300; Two-stage compressors 310,810,910; chest

320; Drive motor 330; First suction line

340; Second suction pipe 350; First discharge tube

360; Second discharge pipe 400; 2nd control valve

500; First control valve 610; Inflow Connector

620,630; First and second connectors 640; Outflow connector

650; Third connector 660; Valve

670,680,690; 4,5,6 connector

Best Mode for Implementation of the Invention

Hereinafter, an air conditioner and a driving method thereof according to the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

1 is a piping diagram showing a first embodiment of the air conditioner of the present invention. 4 and 5 are piping views showing the operating states in the power mode and the saving mode of the first embodiment of the air conditioner of the present invention, respectively.

As shown in the drawing, the air conditioner includes an indoor side heat exchanger 100 and includes an indoor unit installed indoors, and an outdoor side heat exchanger 200, which is installed on an outdoor side. An outdoor unit, a first compression unit C1 and a second compression unit C2 installed on the outdoor unit side to compress refrigerant, respectively, the indoor heat exchanger 100 and the indoor heat exchanger 100. ) And the first and second compression units (C1) and the second compression unit (C2) are connected to form a cycle, the refrigerant flow to the first compression unit (C1) and the second compression unit (C2) It comprises a refrigerant guide means for regulating the flow of the refrigerant to be selectively made in series or in parallel.

The first compression unit C1 and the second compression unit C2 are provided in one hermetically sealed container 310, and the first compression unit C1 and the second compression unit C2 are the hermetic container 310. The second stage is provided with a refrigerant flow path through which the refrigerant is respectively compressed by the driving force of one driving motor 320 mounted in the cavity, and the refrigerant is sucked into and discharged from the first and second compression units C1 and C2. A compressor (two stage type compressor) 300 is configured. The drive motor 320 is a constant speed motor.

The refrigerant passage of the two-stage compressor 300 includes a first suction pipe 330 for guiding suction of the refrigerant into the compression space of the first compression unit C1 and a compression space of the refrigerant into the compression space of the second compression unit C2. The second suction pipe 340 for guiding suction and the refrigerant coupled to the sealed container 310 and discharged from the first compression unit C1 pass through the sealed container 310 to the outside of the sealed container 310. The first discharge pipe 350 and the second discharge pipe 360 is coupled to the sealed container 310 and the refrigerant discharged from the second compression unit (C2) is discharged to the outside of the sealed container 310 to the outside. It is configured to include.

A chamber 370 is provided between the second compression unit C2 and the second discharge tube 360 to fill with the refrigerant extruded and discharged from the second compression unit C2. The chamber 370 is formed by a cover 380 having a predetermined shape coupled to a lower surface of the second compression unit C2.

In addition, the refrigerant discharged from the compression unit group side including the first compression unit C1 and the second compression unit C2 is connected to the connection pipes in the outdoor side heat exchanger 200 or the indoor side heat exchanger 100. There is provided a second control valve 400 to control to flow selectively.

The second control valve 400 is preferably a four way valve.

The refrigerant guiding means is connected to the first control valve 500 and the first control valve 500 to control the refrigerant flow direction, the refrigerant from the indoor heat exchanger 100 or the outdoor heat exchanger 200 A first connecting pipe 620 connecting the inlet connecting pipe 610 flowing into the first control valve 500 and the suction side of the first compression unit C1, that is, the first suction pipe 330; A second connection pipe 630 connecting the first control valve 500 and the suction side of the second compression unit C2, that is, the second suction pipe 340, and the first control valve 500. And the outlet side connection pipe 640 through which the refrigerant flows to the indoor side heat exchanger 100 or the outdoor side heat exchanger 200 and the discharge side of the second compression unit C2, that is, the second discharge tube 360. It is configured to include a third connecting pipe 650 and the opening and closing valve 660 mounted to the outlet side connecting pipe 640 to open and close the flow of the refrigerant.

The discharge side of the first compression unit C1 is connected to the first control valve 500 by a first discharge tube 350.

The open / close valve 660 is positioned between a first control valve 500 and a third connecting pipe 650 connected to the outlet side connecting pipe 640.

The first control valve 500 is preferably a four-way valve.

The outlet side connection pipe 640 connected to the first control valve 500 is connected to the second control valve 400, and the inlet side connection pipe 610 connected to the first control valve 500 is It is connected to the second control valve 400. The fourth connecting pipe 670 connected to the inflow side of the outdoor heat exchanger 200 is connected to the second control valve 400 and is connected to the outflow side of the indoor heat exchanger 100. 5 connecting pipe 680 is connected to the second control valve (400).

The outlet side of the outdoor heat exchanger 200 and the inlet side of the indoor side heat exchanger 100 are connected by a sixth connecting pipe 690, and an expansion valve 700 (6) to the sixth connecting pipe 690. Or capillaries).

Reference numeral 390 is an accumulator.

2 is a piping diagram showing a second embodiment of the air conditioner of the present invention. The same reference numerals are given to the same parts as in the first embodiment.

As shown in the drawing, the air conditioner is one compressor each of the first and second compression units C1 and C2. That is, the first compression unit C1 and the second compression unit C2 become a first compressor and a second compressor. In addition, the first compression unit C1 and the second compression unit C2 are connected to the outdoor heat exchanger 200 and the indoor heat exchanger 100 by connecting tubes to form one cycle. The first compression unit C1 and the second compression unit C2 are selectively connected to the connecting pipes in series or in parallel, and the refrigerant is continuously compressed in the first and second compression units C1 and C2 and discharged. Or a refrigerant guide means for guiding (adjusting) the flow path of the refrigerant so as to compress or discharge the refrigerant in the first and second compression units C1 and C2, respectively.

The compressor is configured to include a driving motor part mounted in the hermetic container 310 to generate a driving force, and a compressor part receiving the driving force of the driving motor part to compress the refrigerant. Suction pipes 820 and 920 through which refrigerant is sucked are connected to the sealed containers 810 and 910, and discharge pipes 830 and 930 through which the compressed refrigerant is discharged to the sealed containers 810 and 910. Connected. The drive motor constituting the drive motor unit is a constant speed motor. Such a compressor may be a rotary compressor or a scroll compressor.

In addition, the refrigerant discharged from the compression unit group side including the first compression unit C1 and the second compression unit C2 is connected to the connection pipes in the outdoor side heat exchanger 200 or the indoor side heat exchanger 100. There is provided a second control valve 400 to control to flow selectively.

The second control valve 400 is preferably a four way valve.

The refrigerant guiding means is connected to the first control valve 500 and the first control valve 500 to control the refrigerant flow direction, the refrigerant from the indoor heat exchanger 100 or the outdoor heat exchanger 200 A first connecting pipe 620 connecting the inlet-side connecting pipe 610 flowing into the first control valve 500 and the suction pipe 820 of the first compressor, which is the first compression unit C1, and the first connecting pipe 620. A second connection pipe 630 connecting the first control valve 500 and the suction pipe 920 of the second compressor, which is the second compression unit C2, and the first control valve 500 to be connected to the indoor side. Third connection connecting the outlet pipe 640 through which the refrigerant flows to the heat exchanger 100 or the outdoor heat exchanger 200 and the discharge pipe 930 of the second compressor, which is the second compression unit C2. It is configured to include a pipe 650 and the opening and closing valve 660 mounted on the outlet side connecting pipe 640 to open and close the flow of the refrigerant.

The discharge pipe 830 of the first compressor, which is the first compression unit C1, is connected to the first control valve 500 by the first discharge pipe 350.

The open / close valve 660 is positioned between a first control valve 500 and a third connecting pipe 650 connected to the outlet side connecting pipe 640.

The first control valve 500 is preferably a four-way valve.

The outlet side connection pipe 640 connected to the first control valve 500 is connected to the second control valve 400, and the inlet side connection pipe 610 connected to the first control valve 500 is It is connected to the second control valve 400. The fourth connecting pipe 670 connected to the inflow side of the outdoor heat exchanger 200 is connected to the second control valve 400 and is connected to the outflow side of the indoor heat exchanger 100. 5 connecting pipe 680 is connected to the second control valve (400).

The outlet side of the outdoor heat exchanger 200 and the inlet side of the indoor side heat exchanger 100 are connected by a sixth connecting pipe 690, and an expansion valve 700 (6) to the sixth connecting pipe 690. Or capillaries).

3 is a flowchart illustrating an embodiment of a method for operating an air conditioner of the present invention.

As shown in the drawing, the operation method of the air conditioner includes the steps of starting operation of the air conditioner, selecting a saving mode or a power mode according to a set condition, and a saving mode. In the case of controlling the flow of the refrigerant in a series relationship so that the refrigerant is compressed in the first compression unit (C1) and then compressed in the second compression unit (C2), and in the power mode the refrigerant is the first compression unit ( And controlling the flow of the refrigerant in parallel so as to be respectively compressed in the C1) and the second compression unit C2.

The saving mode and the power mode may be set according to a change in temperature or season of the space where the air conditioner is installed.

The saving mode is to reduce the amount of refrigerant discharged from the compression unit group including the first compression unit C1 and the second compression unit C2, and the power mode is to compare the amount of the refrigerant discharged from the compression unit group. To increase. Based on seasonal changes, it is usually operated in saving mode in spring and autumn, and in powder mode in summer.

In addition, the refrigerant discharged from the first compression unit (C1) and the second compression unit (C2) side is controlled to selectively flow to the outdoor heat exchanger 200 or the indoor heat exchanger (100).

On the other hand, when two or more compression units for compressing the refrigerant is provided to control the flow of the refrigerant so that the compression units are connected in series in the saving mode, and the flow of the refrigerant so that the compression units are connected in parallel in the power mode Can be.

Hereinafter, the operational effects of the air conditioner of the present invention and its operation method will be described.

First, a first embodiment of an air conditioner will be described first. When the air conditioner is in the power mode for cooling operation, as illustrated in FIG. 4, the air conditioner controls the first control valve 500 to connect the inflow connector 610 and the second connector 630. The first discharge pipe 350 and the outlet side connecting pipe 640 are connected. At the same time, the second control valve 400 is controlled to connect the inlet connector 610 and the fifth connector 680 and also connect the outlet connector 640 and the fourth connector 670. do.

In this state, when the driving motor 320 of the two-stage compressor operates, the driving force of the driving motor 320 is received to operate the first compression unit C1 and the second compression unit C2. As the first compression unit C1 and the second compression unit C2 operate, the refrigerant passing through the indoor heat exchanger 100 flows through the fifth connection pipe 680 and the inlet connection pipe 610. And a portion of the refrigerant flowing through the inflow side connecting pipe 610 is sucked into the compression space of the first compression unit C1 through the first connecting pipe 620 and the first suction pipe 330. The remaining refrigerant flowing through the inflow side connecting pipe 610 is sucked into the compression space of the second compression unit C2 through the second connecting pipe 630 and the second suction pipe 340.

Refrigerant sucked into the compression space of the first compression unit (C1) is compressed and discharged in the first compression unit (C1) to the outlet side connecting pipe (inside the sealed container 310 and the first discharge pipe 350 ( 640 is discharged. At this time, the on-off valve 660 is in an open state.

The refrigerant sucked into the compression space of the second compression unit C2 is compressed and discharged in the second compression unit C2, and the discharged refrigerant is discharged from the chamber 370, the second discharge tube 360, and the third refrigerant. It is introduced into the outlet side connecting pipe 640 through the connecting pipe (650).

The refrigerant compressed in the first compression unit C1 and the refrigerant compressed in the second compression unit C2 are transferred to the outdoor heat exchanger 200 through the outlet connection pipe 640 and the fourth connection pipe 670. Inflow. The refrigerant passing through the outdoor heat exchanger 200 flows into the indoor heat exchanger 100 through the sixth connection pipe 690 and the refrigerant passing through the indoor heat exchanger 100 is the fifth connection pipe 680. It flows through the inlet side connecting pipe 610 through.

The refrigerant flowing into the inlet connection pipe 610 circulates the cycle while repeating the above process. As the process is repeated, the outdoor heat exchanger 200 releases heat to the outside, and forms cold air while absorbing external heat from the indoor heat exchanger 100.

When operating in the powder mode as described above, the first compression unit C1 and the second compression unit C2 are connected in parallel so that the refrigerant is compressed in the first compression unit C1 and the second compression unit C2, respectively. Since it is discharged, the discharge amount of the refrigerant is relatively increased.

On the other hand, when the power mode is applied to the heating operation by adjusting the second control valve 400 to connect the outlet side connecting pipe 640 and the fifth connecting pipe 680 and also the inlet connecting pipe 610 The fourth connector 670 is connected. At this time, the outdoor heat exchanger 200 serves as an evaporator, and the indoor heat exchanger 100 serves as a condenser, thereby dissipating heat from the indoor heat exchanger 100 to the outside.

When the operation of the air conditioner is a cooling mode saving mode, as illustrated in FIG. 5, the first control valve 500 is controlled to control the first discharge pipe 350 and the second connection pipe 630. ) And block the port of the first control valve 500 that is connected to the inlet-side connection pipe (610). And the closing valve 660 is closed. At the same time, the second control valve 400 is controlled to connect the inlet connector 610 and the fifth connector 680 and also connect the outlet connector 640 and the fourth connector 670. do.

In this state, when the driving motor 320 of the two-stage compressor operates, the driving force of the driving motor 320 is received to operate the first compression unit C1 and the second compression unit C2. As the first compression unit C1 and the second compression unit C2 operate, the refrigerant passing through the indoor heat exchanger 100 flows through the fifth connection pipe 680 and the inlet connection pipe 610. And the refrigerant flowing through the inflow side connecting pipe 610 are sucked into the compression space of the first compression unit C1 through the first connecting pipe 620 and the first suction pipe 330.

The refrigerant sucked into the compression space of the first compression unit (C1) is compressed and discharged in the first compression unit (C1) to the second connecting pipe (inside the sealed container 310 and through the first discharge pipe 350) 630). The refrigerant flowing into the second connection pipe 630 is sucked into the compression space of the second compression unit C2 through the second suction pipe 340.

The refrigerant sucked into the compression space of the second compression unit C2 is compressed and discharged in the second compression unit C2, and the discharged refrigerant is connected to the chamber 370 and the second discharge pipe 360 by a third connection. It flows to the outlet side connection pipe 640 through the pipe 650.

The refrigerant flowing through the outlet side connection pipe 640 is introduced into the outdoor side heat exchanger 200 through the fourth connection pipe 670. The refrigerant passing through the outdoor heat exchanger 200 flows into the indoor heat exchanger 100 through the sixth connection pipe 690 and the refrigerant passing through the indoor heat exchanger 100 is the fifth connection pipe 680. It flows through the inlet side connecting pipe 610 through.

The refrigerant flowing into the inlet connection pipe 610 circulates the cycle while repeating the above process. As the process is repeated, the outdoor heat exchanger 200 releases heat to the outside, and forms cold air while absorbing external heat from the indoor heat exchanger 100.

When operating in the saving mode as described above, the first compression unit C1 and the second compression unit C2 are connected in series so that the refrigerant continuously passes through the first compression unit C1 and the second compression unit C2. Since the refrigerant is compressed and discharged, the amount of refrigerant discharged is relatively small.

Meanwhile, when the saving mode is applied to a heating operation, the second control valve is adjusted to connect the outlet connector 640 and the fifth connector 680, and also the inlet connector 610 and the fourth connector. The pipe 670 is connected. At this time, the outdoor heat exchanger 200 serves as an evaporator, and the indoor heat exchanger 100 serves as a condenser, thereby dissipating heat from the indoor heat exchanger 100 to the outside.

And the operation of the second embodiment of the air conditioner of the present invention will be described.

First, in the cooling operation power mode, as shown in FIG. 6, the first control valve 500 is controlled to connect the inflow-side connecting pipe 610 and the second connecting pipe 630 and also to the first. The discharge pipe 350 and the outlet side connecting pipe 640 are connected. And the open-close valve 660 is opened. At the same time, the second control valve 400 is controlled to connect the inlet side connecting pipe 610 and the fifth connecting pipe 680 and also to connect the outlet side connecting pipe 640 and the fourth connecting pipe 670. do.

In such a state, when power is applied to the first compressor of the first compression unit C1 and the second compressor of the second compression unit C2 to operate the first compressor and the second compressor, the indoor heat exchanger The refrigerant passing through the 100 flows through the fifth connector 680 and the inlet connector 610, and a part of the refrigerant flowing through the inlet connector 610 passes through the first connector 620. Through the first compressor. And the remaining refrigerant flowing through the inlet side connecting pipe 610 is sucked into the second compressor through the second connecting pipe 630.

The refrigerant sucked into the first compressor is compressed and discharged by the first compressor and discharged through the first discharge pipe 350 to the outlet side connection pipe 640. The refrigerant sucked into the second compressor is compressed and discharged by the second compressor, and the discharged refrigerant flows into the outlet side connection pipe 640 through the third connection pipe 650.

The refrigerant compressed by the first compressor and the refrigerant compressed by the second compressor are introduced into the outdoor heat exchanger 200 through the outlet connection pipe 640 and the fourth connection pipe 670. The refrigerant passing through the outdoor heat exchanger 200 flows into the indoor heat exchanger 100 through the sixth connection pipe 690 and the refrigerant passing through the indoor heat exchanger 100 is the fifth connection pipe 680. It flows through the inlet side connecting pipe 610 through.

The refrigerant flowing into the inlet connection pipe 610 circulates the cycle while repeating the above process. As the process is repeated, the outdoor heat exchanger 200 releases heat to the outside, and forms cold air while absorbing external heat from the indoor heat exchanger 100.

When operating in the powder mode as described above, the first compressor, which is the first compression unit C1, and the second compressor, which is the second compression unit C2, are connected in parallel so that the refrigerant is compressed in the first compressor and the second compressor, respectively. Since it is discharged, the discharge amount of the refrigerant is relatively increased.

In the heating operation, the second control valve 400 is operated as described above.

Meanwhile, in the cooling operation saving mode, as illustrated in FIG. 7, the first control valve 500 is controlled to connect the first discharge pipe 350 and the second connection pipe 630 to the inflow. A port of the first control valve 500 connected to the side connection pipe 610 is blocked. And the closing valve 660 is closed. At the same time, the second control valve 400 is controlled to connect the inlet connector 610 and the fifth connector 680 and also connect the outlet connector 640 and the fourth connector 670. do.

In such a state, when power is applied to the first compressor of the first compression unit C1 and the second compressor of the second compression unit C2 to operate the first compressor and the second compressor, the indoor heat exchanger The refrigerant passing through 100 is sucked into the first compressor through the fifth connector 680, the inlet connector 610, and the first connector 620.

The refrigerant sucked into the first compressor is compressed and discharged by the first compressor and sucked into the second compressor through the first discharge pipe 350 and the second connection pipe 630. The refrigerant compressed and discharged by the second compressor is introduced into the outlet side connection pipe 640 through the third connection pipe 650.

The refrigerant introduced into the outlet side connection pipe 640 is introduced into the outdoor side heat exchanger 200 through the fourth connection pipe 670. The refrigerant passing through the outdoor heat exchanger 200 flows into the indoor heat exchanger 100 through the sixth connection pipe 690 and the refrigerant passing through the indoor heat exchanger 100 is the fifth connection pipe 680. It flows through the inlet side connecting pipe 610 through.

The refrigerant flowing into the inlet connection pipe 610 circulates the cycle while repeating the above process. As the process is repeated, the outdoor heat exchanger 200 releases heat to the outside, and forms cold air while absorbing external heat from the indoor heat exchanger 100.

When operating in the saving mode as described above, the first compressor, which is the first compression unit C1, and the second compressor, which is the second compression unit C2, are connected in series so that the refrigerant continuously passes through the first compressor and the second compressor. Since the refrigerant is compressed and discharged, the amount of refrigerant discharged is relatively small.

In the heating operation, the second control valve 400 is operated as described above.

As described above, the air conditioner and the driving method of the present invention is operated while varying the capacity according to the change in the temperature of the room or the change of seasons, thereby reducing the power consumption consumed during operation to increase the customer satisfaction. Not only can it increase the competitiveness of the product.

In addition, it is possible to reduce the manufacturing cost by varying the capacity while using a low-cost constant speed motor.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

Claims (23)

A compressor provided in the sealed container and including a first compression unit (C1) and a second compression unit (C2) for respectively compressing the refrigerant; An outdoor side heat exchanger (200) provided in an outdoor unit and connected to the first and second compression units (C1) and (C2); An indoor side heat exchanger (100) provided in an indoor unit and connected to the first and second compression units (C1) and C2 and the outdoor side heat exchanger (200); By selectively connecting the first compression unit C1 and the second compression unit C2 in series or in parallel, the first and second compression units C1 and C2 continuously compress and discharge the refrigerant, or And a refrigerant guiding means for guiding (adjusting) the flow of the refrigerant to compress and discharge the refrigerant in each of the two compression units (C1) (C2). According to claim 1, wherein the first compression unit (C1) is configured to include a drive motor unit mounted in the sealed container 810 to generate a driving force, and a compressor mechanism for compressing the refrigerant by receiving the driving force of the drive motor unit. The second compression unit (C2) is a compressor comprising a drive motor unit mounted in the hermetic container 910 to generate a driving force, and a compressor mechanism for compressing the refrigerant by receiving the driving force of the drive motor unit. Air conditioner characterized in that. The air conditioner according to claim 2, wherein the drive motor unit rotates at a constant speed. The method of claim 1, wherein the first compression unit (C1) and the second compression unit (C2) is provided in one sealed container 310, the first compression unit (C1) and the second compression unit (C2). Receives the driving force of one drive motor 320 mounted in the sealed container 310 to compress the refrigerant, respectively, the refrigerant is sucked into the first compression unit (C1) and the second compression unit (C2) and discharged An air conditioner comprising a two stage type compressor (300) having a refrigerant flow path. The air conditioner according to claim 4, wherein the drive motor is a constant speed motor. The refrigerant passage of the second compressor 300 includes: a first suction pipe 330 for guiding suction of the refrigerant into a compression space of the first compression unit C1, and the second compression unit C2. The second suction pipe 340 for guiding the suction of the refrigerant into the compressed space of the refrigerant, and the refrigerant discharged from the first compression unit (C1) coupled to the sealed container 310 is sealed through the sealed container 310 A first discharge pipe 350 which exits to the outside of the container 310 and a refrigerant which is coupled to the sealed container 310 and discharged from the second compression unit C2 to the outside of the closed container 310; Air conditioner comprising a two discharge pipe (360). The method of claim 6, wherein the chamber 370 is provided between the second compression unit (C2) and the second discharge tube 360 is filled with the refrigerant discharged from the second compression unit (C2) discharged. Featuring air conditioner. The method of claim 1, wherein the refrigerant guide means is connected to the first control valve 500 and the first control valve 500 for controlling the flow direction of the refrigerant, the indoor heat exchanger 100 or the outdoor heat exchanger A first connecting pipe 620 connecting the inlet-side connecting pipe 610 through which the refrigerant flows from the 200 to the first control valve 500 and the suction side of the first compression unit C1, and 1, a first discharge pipe 350 connecting the discharge side of the compression unit C1 and the first control valve 500, and a suction side of the first control valve 500 and the second compression unit C2. A second connection pipe 630 to be connected to the outlet control pipe 640 connected to the first control valve 500 and flowing refrigerant to the indoor heat exchanger 100 or the outdoor heat exchanger 200; And a third connecting pipe 650 connected to the discharge side of the second compression unit C2, and an opening / closing valve 660 mounted to the outlet connecting pipe 640 to open and close the flow of the refrigerant. Air conditioner characterized by configured. The air conditioner according to claim 8, wherein the on-off valve (660) is located between a connection portion to which the first control valve (500) and the third connection pipe (650) are connected. 9. The air conditioner of claim 8, wherein the first control valve is a four-way valve. According to claim 1, Compression unit group side including the first compression unit (C1) and the second compression unit (C2) and the outlet side connecting pipe 640 connecting the outdoor heat exchanger 200, The refrigerant discharged from the compression unit group side is connected to an inlet connecting pipe 610 connecting the compression unit group side and the indoor side heat exchanger 100 to the outdoor side heat exchanger 200 or the indoor side heat exchanger. And a second control valve (400) for adjusting the flow to the (100) side. 12. The air conditioner of claim 11, wherein the second control valve is a four-way valve. In the operating method of the air conditioner provided in the airtight container and equipped with the compressor which contains the 1st compression unit C1 and the 2nd compression unit C2 which respectively compress a refrigerant | coolant, Starting operation of the air conditioner; Selecting a saving mode or a power mode according to a set condition; Controlling the flow of the refrigerant in a series relationship such that the refrigerant is compressed in the first compression unit (C1) and then compressed in the second compression unit (C2) in the saving mode; Controlling the flow of refrigerant in a parallel relationship so that the refrigerant is compressed in the first compression unit C1 and the second compression unit C2 in the power mode. Way. The method of claim 13, wherein the refrigerant discharged from the first compression unit C1 and the second compression unit C2 is selectively flowed to the outdoor heat exchanger 200 or the indoor heat exchanger 100. Operation method of the air conditioner, characterized in that. The method of claim 13, wherein when two or more compression units for compressing the refrigerant are provided, the flow of the refrigerant is controlled so that the compression units are connected in series in the saving mode, and the compression units are connected in parallel in the power mode. Operating method of the air conditioner, characterized in that for controlling the flow. The method of claim 1, wherein the compressor, Airtight container 310; A drive motor 320 mounted in the sealed container to generate a driving force; A first compression unit (C1) and a second compression unit (C2) provided in the sealed container to receive a driving force of the driving motor to compress the gas, respectively; By selectively connecting the first compression unit C1 and the second compression unit C2 in series or in parallel, the first and second compression units C1 and C2 continuously compress and discharge the refrigerant, or And a refrigerant guiding means for guiding (adjusting) the flow of the refrigerant to compress and discharge the refrigerant in each of the two compression units (C1) (C2). The method of claim 16, wherein the refrigerant guide means is a first control valve 500 for adjusting the flow direction of the refrigerant, the inlet-side connection pipe 610 is connected to the first control valve 500, and the first compression A first connecting pipe 620 connected to the suction side of the unit C1, a first discharge pipe 350 connecting the discharge side of the first compression unit C1 and the first control valve 500, A second connection pipe 630 connecting the suction side of the first control valve 500 and the second compression unit C2, and an outlet side connection pipe 640 connected to the first control valve 500. And a third connecting pipe 650 connected to the discharge side of the second compression unit C2, and an opening / closing valve 660 mounted to the outlet side connecting pipe 640 to open and close the flow of the refrigerant. Air conditioner characterized in that. 18. The air conditioner according to claim 17, wherein the on-off valve (660) is located between a connecting portion to which the first control valve (500) and the third connecting pipe (650) are connected. 18. The air conditioner of claim 17, wherein the first control valve is a four-way valve. The method of claim 1, wherein the compressor, Airtight container 310; A drive motor 320 mounted in the sealed container to generate a driving force; A first compression unit (C1) and a second compression unit (C2) provided in the sealed container to receive a driving force of the driving motor to compress the gas, respectively; And a refrigerant passage through which refrigerant is sucked into and discharged from the first compression unit (C1) and the second compression unit (C2). 21. The air conditioner of claim 20, wherein the drive motor is a constant speed motor. The method of claim 20, wherein the refrigerant flow path is a first suction pipe 330 for guiding the suction of the refrigerant into the compression space of the first compression unit (C1) and the compression space of the second compression unit (C2) of the refrigerant The second suction pipe 340 for guiding suction and the refrigerant coupled to the sealed container 310 and discharged from the first compression unit C1 pass through the sealed container 310 to the outside of the sealed container 310. The first discharge pipe 350 and the second discharge pipe 360 is coupled to the sealed container 310 and the refrigerant discharged from the second compression unit (C2) is discharged to the outside of the sealed container 310 to the outside. Air conditioner, characterized in that configured to include. 21. The method of claim 20, wherein the chamber 370 is provided between the second compression unit (C2) and the second discharge tube 360 is filled with the refrigerant discharged from the second compression unit (C2) discharged. Featuring air conditioner.

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