KR20210147643A - Air conditioner of one assembled and the control method - Google Patents

Abstract

The present invention relates to a cooling/heating machine of an integrated structure and, more specifically, to a method of controlling the cooling and heating of a cooling/heating machine. The cooling/heating machine of an integrated structure includes: a compressor for compressing a refrigerant into a gaseous state of high temperature and high pressure; a liquid separator for separating liquid from a liquid refrigerant mixed with the liquid among refrigerants flowing to the compressor; a plurality of first heat exchangers condensing a high-temperature and high-pressure gas refrigerant introduced by the compressor or evaporating the liquid refrigerant into a gaseous state; a first blowing fan for blowing the gas condensed or evaporated by the first heat exchangers; a plurality of second heat exchangers condensing the high-temperature and high-pressure gas refrigerant introduced by the compressor or evaporating the liquid refrigerant into a gaseous state; a second blowing fan for blowing the gas condensed or evaporated by the second heat exchangers; an expansion valve decompressing the condensed refrigerant and comprising a first expansion valve provided in the first space portion and a second expansion valve provided in the second space portion; and a four-way valve switching the flow of the refrigerant during a cooling or heating operation. In accordance with the present invention, the cooling/heating machine of an integrated structure can smoothly switch an operation mode to cooling or heating through the four-way valve, and can perform a defrosting operation without stopping the compressor.

Description

Air conditioner of one-piece structure and control method thereof {Air conditioner of one assembled and the control method}

The present invention relates to an air conditioner in which an outdoor unit is integrally provided, and more particularly, to a method of controlling cooling and heating of the air conditioner.

In general, an air conditioner refers to a device for selectively realizing cooling and heating using a high-temperature, high-pressure refrigerant discharged from a compressor by a heat exchanger that alternately performs the roles of a condenser and an evaporator.

This air conditioner is composed of an indoor unit and an outdoor unit, and cooling and heating are realized as the process of compression-condensation-expansion-evaporation is continuously performed.

In the case of an air conditioner in which both cooling and heating are performed, the flow direction of the refrigerant is changed by using a four-way valve in order to change from a cooling operation to a heating operation or from a heating operation to a cooling operation.

To switch from cooling to heating or heating to cooling, stop the compressor and wait until the pressures in the high-pressure section and low-pressure section become equal.

In the related art, Korean Patent Registration No. 10-1700242, Korean Patent Publication No. 2013-0013576, etc. are described.

However, in the case of the prior art described above, the operation mode is switched as described above, and in this case, the four-way valve must be switched twice.

Accordingly, when the defrost operation is performed, there is a problem that a certain amount of time is required until the normal operation is performed.

In addition, switching the operation mode by stopping the compressor while the series of switching processes as described above is performed causes the compressor to frequently intermittently operate, thereby shortening the life of the compressor.

Korean Patent Registration No. 10-1700242 Korean Patent Publication No. 2013-0013576

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and relates to an air conditioner in which an outdoor unit is integrally provided and a method for controlling the same.

According to a feature of the present invention for achieving the above object, the air conditioner and the control method thereof having an integrated structure according to the present invention form an external shape by a main body, and the inside is formed by a partition plate to form a first space and a second space. In the air conditioner in which a space portion and a third space portion are formed, the air conditioner comprising: a compressor provided in the third space portion for compressing a refrigerant into a gaseous state of high temperature and high pressure; a liquid separator provided in the third space and separating a liquid from a liquid refrigerant mixed with a liquid among the refrigerant flowing to the compressor; a plurality of first heat exchangers provided in the first space and condensing the high-temperature and high-pressure gas refrigerant introduced by the compressor or evaporating the liquid refrigerant into a gaseous state; a first blowing fan provided in the first space and blowing the gas condensed or evaporated by the first heat exchanger; a plurality of second heat exchangers provided in the second space and condensing the high-temperature and high-pressure gas refrigerant introduced by the compressor or evaporating the liquid refrigerant into a gaseous state; a second blowing fan provided in the second space and blowing the gas condensed or evaporated by the second heat exchanger; an expansion valve provided in the first space portion and the second space portion, respectively, for decompressing the condensed refrigerant; and a 4-way valve for switching the flow of refrigerant during cooling or heating operation.

In the cooling cycle during the cooling operation, a compressor that compresses the refrigerant and converts it to a gaseous state of high temperature and high pressure, and the gas refrigerant converted into a high temperature and high pressure by the compressor is moved through the four-way valve to condense the high temperature and high pressure gaseous refrigerant and a second expansion valve for reducing the pressure of the refrigerant condensed into a liquid by the first heat exchanger to convert it into a low-temperature and low-pressure liquid, and the second expansion valve to evaporate the liquid refrigerant in a low-temperature and low-pressure state. A second heat exchanger for vaporizing gas refrigerant in a low-temperature and low-pressure state, and a liquid separator for separating a liquid from a liquid refrigerant mixed with a liquid among the refrigerants in a low-temperature and low-pressure state in the second heat exchanger are sequentially circulated, and the liquid The gaseous refrigerant separated from the liquid in the separator is introduced into the compressor again to repeat a series of processes, and the air heated by the refrigerant condensed from the first heat exchanger is discharged to the outside through the first blower fan. and the air cooled by the refrigerant vaporized from the second heat exchanger is discharged to the outside through the second blower fan.

The heating cycle during heating operation condenses the high-temperature and high-pressure gaseous refrigerant by a compressor that compresses the refrigerant and converts it into a high-temperature and high-pressure gaseous state, and moves the gaseous refrigerant converted into a high-temperature and high-pressure gas by the compressor through the four-way valve a second heat exchanger, a first expansion valve for reducing the pressure of the refrigerant condensed into a liquid by the second heat exchanger to convert it into a low-temperature and low-pressure liquid; and evaporating the low-temperature and low-pressure liquid refrigerant by the first expansion valve A first heat exchanger for vaporizing gas refrigerant in a low-temperature and low-pressure state, and a liquid separator for separating a liquid from a liquid refrigerant mixed with a liquid among the refrigerants in a low-temperature and low-pressure state in the first heat exchanger are sequentially circulated, and the liquid The refrigerant in the gaseous state separated from the liquid in the separator is introduced into the compressor again to repeat a series of processes, and the air heated by the refrigerant condensed from the second heat exchanger is discharged to the outside through the second blower fan. and the air cooled by the refrigerant vaporized from the first heat exchanger is discharged to the outside through the first blowing fan.

In the third space, a first pipe through which the refrigerant is discharged or introduced from the first heat exchanger, a second pipe through which the refrigerant is discharged or introduced from the second heat exchanger, and a second pipe through which the refrigerant is introduced into the compressor A plate-type heat exchanger having four holes is further provided such that a third pipe and a fourth pipe, which is connected to a part of the second pipe and receives a portion of the refrigerant moving through the second pipe, are respectively connected; the first pipe and the second pipe are connected through the plate heat exchanger, and the third pipe and the fourth pipe are connected through the plate heat exchanger; The fourth transfer tube further includes a capillary for decompressing the condensed refrigerant to a low-temperature and low-pressure state, and an electromagnetic valve for controlling the flow of refrigerant moving to the capillary according to the temperature and pressure of the compressor. It is characterized in that the refrigerant introduced into the fourth pipe is converted into a low-temperature and low-pressure state as it passes through the capillary pipe, and is introduced into the compressor through the third pipe.

A refrigerant return pipe for recovering the gaseous refrigerant from the liquid separator and a refrigerant discharge pipe for discharging the refrigerant compressed to a high temperature and high pressure state by compression are further provided on one surface of the compressor; A gas supply pipe for discharging a high-temperature and high-pressure gaseous refrigerant to the first heat exchanger or the second heat exchanger to perform a defrosting operation is provided on one surface of the refrigerant discharge pipe.

The air conditioner and the control method of the integrated structure according to the present invention have the following effects.

First, the air conditioner of the present invention is provided with a four-way valve. The four-way valve is connected to the compressor to move the high-temperature and high-pressure gas refrigerant compressed from the compressor to the first heat exchanger or the second heat exchanger, and at the same time to remove the refrigerant discharged from the first heat exchanger or the second heat exchanger. It is also possible to move it to a liquid separator. Accordingly, it is possible to control the flow of the refrigerant according to the valve switching of the four-way valve, so that the cooling operation and the heating operation can be performed at the same time.

Second, the air conditioner of the present invention is further provided with a plate heat exchanger to prevent overheating of the compressor. The plate heat exchanger includes a first pipe through which refrigerant is discharged or introduced from the first heat exchanger, a second pipe through which refrigerant is discharged or introduced from the second heat exchanger, and a third pipe through which refrigerant is introduced into the compressor; , a fourth pipe that is connected to a part of the second pipe and receives a portion of the refrigerant moving through the second pipe is connected to each other. Accordingly, the refrigerant flowing through the first and second tubes and the refrigerant flowing through the third and fourth tubes can easily exchange heat.

Third, the fourth moving tube is further provided with a solenoid valve and a capillary tube. The solenoid valve controls the flow of refrigerant according to the pressure and temperature of the compressor. When a portion of the refrigerant flowing through the second pipe is introduced into the fourth pipe by the solenoid valve, it is changed to a low-temperature and low-pressure state by the capillary pipe. It flows into the compressor through the third moving tube. Accordingly, there is an advantage of preventing the compressor from overheating by automatically introducing a low-temperature refrigerant into the compressor even during the cooling operation and the heating operation.

Fourth, a gas supply pipe is further provided on some surface of the refrigerant discharge pipe through which the refrigerant is discharged from the compressor. The gas supply pipe introduces some of the high-temperature and high-pressure refrigerants flowing through the refrigerant discharge pipe into the first heat exchanger or the second heat exchanger. Therefore, there is an advantage that the first heat exchanger and the second heat exchanger can be defrosted without stopping the operation of the compressor.

1 is an overall perspective view showing an air conditioner having an integrated structure of the present invention.
Figure 2 is a circuit diagram showing a cooling cycle of the air conditioner of the integrated structure of the present invention.
Figure 3 is a circuit diagram showing a heating cycle of the air conditioner of the integrated structure of the present invention.

Hereinafter, a preferred embodiment of an integrated structure air conditioner and a control method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall perspective view showing the air conditioner of the integrated structure of the present invention, FIG. 2 is a circuit diagram showing the cooling cycle of the air conditioner of the integrated structure of the present invention, and FIG. 3 is a heating cycle of the air conditioner of the integrated structure of the present invention This is the circuit diagram shown.

As shown in these drawings, the air conditioner having an integrated structure according to an embodiment of the present invention has an external shape by a main body 1 elongated in the vertical direction, and the inside is a first space portion 10 from the top by a partition plate. and the second space 20 and the third space 30 are sequentially formed.

The air conditioner of the present invention forms a single integrated structure by providing the components constituting the outdoor unit and the indoor unit in the first space portion 10 , the second space portion 20 , and the third space portion 30 , respectively.

As can be seen in the accompanying drawings, the first space portion 10 has a first heat exchanger 12 , a first blower fan 14 , a first expansion valve 16 , and the second space portion 20 has A second heat exchanger (22), a second blowing fan (24), a second expansion valve (26), and a liquid separator (36), a compressor (32) and a four-way valve (38) in the third space (30) provided, including

The air conditioner having this configuration discharges the refrigerant compressed in the high temperature and high pressure state in the compressor 32 to the first heat exchanger 12 through the four-way valve 38 during the cooling operation to condense and condense it. The heated air is discharged through the first blowing fan 14, and the refrigerant condensed by the first heat exchanger 12 is moved to the second expansion valve 26 to convert the refrigerant into a low-temperature and low-pressure state. After cooling, the air is cooled by transferring it to the second heat exchanger 22, evaporating, and discharging the cooled air through the second blowing fan 24.

And, during the heating operation, the refrigerant compressed in the high-temperature and high-pressure state in the compressor 32 is discharged to the second heat exchanger 22 through the four-way valve 38 to condense it, and the condensed air is heated. It is discharged through the second blowing fan 24, and the refrigerant condensed by the second heat exchanger 22 is moved to the first expansion valve 16 to convert the refrigerant into a low-temperature and low-pressure state, and then Heating is performed by transferring it to the first heat exchanger 12 and evaporating it, and discharging air cooled as it evaporates through the first blowing fan 14 .

At this time, since the compressor 32, the first heat exchanger 12, and the second heat exchanger 22 are connected by the four-way valve 38, the refrigerant stored in the compressor 32 is discharged during the cooling operation. It is moved to the first heat exchanger 12 , and the refrigerant stored in the compressor 32 is moved to the second heat exchanger 22 during the heating operation.

In particular, the air conditioner of the present invention having such a configuration is made of an integral type that does not require separate installation and movement of a separate outdoor unit, and is capable of performing a cooling operation and a heating operation with one device.

This will be described in more detail for each part installed in each space as follows.

First, the third space 30 is a space corresponding to the inner lower end of the body 1 .

The third space 30 includes a liquid separator 36 , a compressor 32 , a four-way valve 38 , a plate heat exchanger 40 , and the like.

The liquid separator 36 is a device for separating liquid and gas from a liquid refrigerant mixed with a liquid among refrigerants to be circulated.

The refrigerant in a gaseous state separated from the liquid through the liquid separator 36 flows into the compressor 32 .

At this time, the refrigerant flowing into the compressor 32 from the liquid separator 36 is in a low-temperature and low-pressure state.

The compressor 32 compresses the low-temperature and low-pressure gas refrigerant introduced from the liquid separator 36 and converts it into a high-temperature and high-pressure gas refrigerant.

The compressor 32 includes a refrigerant return pipe 33 for recovering the gas refrigerant separated from the liquid in the liquid separator 36, and a refrigerant discharge pipe for discharging a high-temperature and high-pressure gas refrigerant to a four-way valve 38 to be described later. (34) is provided.

As such, the compressor 32 is connected to the liquid separator 36 by a refrigerant return pipe 33, and is connected to the four-way valve 38 by a refrigerant discharge pipe 34, thereby supplying high-temperature and high-pressure gaseous refrigerant to the 4 A directional valve 38 can transfer it.

The four-way valve 38 is a valve for controlling the flow of the refrigerant as described above.

The four-way valve 38 is formed of four pipes through which the refrigerant can flow, and as shown in the accompanying drawings, an inlet pipe 380, a first branch pipe 381, a second branch pipe 382, The third branch pipe 383 is formed.

The inlet pipe 380 is a pipe for guiding the high-temperature and high-pressure gas refrigerant discharged from the compressor 32 to the inside of the four-way valve 38 .

In addition, the first branch pipe 381 , the second branch pipe 382 , and the third branch pipe 383 are pipes for guiding the discharge direction of the air introduced into the four-way valve 38 .

The branch pipes 381 , 382 , 383 are formed to be spaced apart at regular intervals as shown in the accompanying drawings, and the first branch pipe 381 formed on the leftmost side is connected to the first heat exchanger 12 , and the middle A second branch pipe 382 formed in the ?oW is connected to the liquid separator 36 , and a third branch pipe 383 formed on the rightmost side is connected to the second heat exchanger 22 .

A member for controlling the flow direction of the refrigerant, such as a cylinder, is provided inside the four-way valve 38 to control the flow of the refrigerant during cooling or heating operation.

In other words, when the air conditioner of the present invention performs a cooling operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 32 by a direction adjusting member such as a cylinder passes through the inlet pipe 380 and the first branch pipe 381 . After passing through sequentially, it is moved to the first heat exchanger 12, and during heating operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 32 by the direction control member is transferred to the inlet pipe 380 and After sequentially passing through the third branch pipe 383 , it is moved to the second heat exchanger 22 .

As such, the gas refrigerant in a high-temperature and high-pressure state moved by the four-way valve 38 is condensed or evaporated.

Next, the plate heat exchanger 40 is formed by stacking several hot plates that facilitate heat transfer, and allows refrigerants having different temperatures to exchange heat with each other.

In the plate heat exchanger 40 applied to the present invention, one hole for connecting to the tube is formed on the upper left and right sides, and on the lower left and right sides, respectively.

Here, the hole formed in the upper right of the plate heat exchanger 40 is connected to the first heat exchanger 12 and the first moving tube 41, and the hole formed in the lower right of the plate heat exchanger 40 will be described later. The second expansion valve 26 is connected to the second moving tube 42 by the second expansion valve 26 .

At this time, the first pipe 41 and the second pipe 42 are structurally connected by the plate heat exchanger 40 , so that the refrigerant discharged from the first heat exchanger 12 or the second heat exchanger 22 . is circulated through the first pipe 41 and the second pipe 42 .

And, the hole formed at the upper left of the plate heat exchanger 40 is connected by the compressor 32 and the third pipe 43, and the hole formed at the lower left side of the plate heat exchanger 40 is the fourth pipe ( 44) is connected by

The fourth pipe 44 is a bypass pipe, and is connected to a portion of the second pipe 42 so that the refrigerant moving through the second pipe 42 passes through the fourth pipe 44 in the plate heat exchanger. (40) is to be introduced.

At this time, the third pipe 43 and the fourth pipe 44 are structurally connected by the plate heat exchanger 40 , so that a portion of the refrigerant moving through the second pipe 42 is transferred to the fourth pipe 44 . ) and discharged to the compressor 32 through the third pipe 43 .

On the other hand, the fourth moving tube 44 is further provided with a solenoid valve 440 and a capillary tube (442).

The solenoid valve 440 is a valve ( valve).

And, the capillary tube 442 is to convert the refrigerant passing through the fourth moving tube 44 into a low-temperature and low-pressure state.

As such, the refrigerant in the low-temperature and low-pressure state by the capillary tube 442 is introduced into the compressor 32 through the third transfer tube 43 to prevent the compressor 32 from being overheated.

In addition, a gas supply pipe 50 is further provided in the third space 30 for defrosting operation.

The gas supply pipe 50 supplies the high-temperature and high-pressure refrigerant of the compressor 32 to the first heat exchanger 12 or the second heat exchanger 22, so that the second heat exchanger 22 during the cooling operation of the air conditioner. The refrigerant moves to the furnace and is discharged through a nozzle to prevent the second heat exchanger 22 from freezing. Conversely, during a heating operation, the refrigerant moves to the first heat exchanger 12 to close the nozzle By being discharged through the first heat exchanger 12 is prevented from freezing.

The gas supply pipe 50 is mounted so as to be connected to a partial surface of the refrigerant discharge pipe 34 to which the compressor 32 and the inlet pipe 380 of the four-way valve 38 are connected, thereby providing a high temperature from the compressor 32 . Allows high-pressure refrigerant to move.

In addition, the gas supply pipe 50 is further provided with a gas valve 52 for controlling the defrosting according to the temperatures of the first heat exchanger 12 and the second heat exchanger 22 to automatically perform the defrosting operation. have.

Here, the gas valve 52 is a type of a general solenoid valve, and automatically controls the flow of refrigerant according to temperature and pressure.

The gas supply pipe 50 is connected to a nozzle provided in the first space 10 by a first supply pipe 53 , and the second space 20 by a second supply pipe 54 . By being connected to a nozzle (nozzle) provided in the cooling or heating operation, the defrosting operation can be performed at the same time.

Next, the first space portion 10 is a space corresponding to the inner upper end of the body (1).

The first space 10 includes a first heat exchanger 12 , a first blowing fan 14 , a first expansion valve 16 , and the like.

The first heat exchanger 12 condenses the high-temperature and high-pressure gaseous refrigerant introduced by the compressor 32 into a liquid or evaporates the liquid refrigerant into a gaseous state.

Since the first heat exchanger 12 can perform the two tasks described above, it can serve as a condenser or an evaporator according to cooling or heating when operating the air conditioner of the present invention.

The first heat exchanger 12 is installed to stand upright in the first space 10 , and two first heat exchangers 12 are provided, and each of the first heat exchangers 12 faces each other. mounted to see

Meanwhile, the first blowing fan 14 is provided between the first heat exchangers 12 mounted to face each other as described above.

The first blower fan 14 exchanges heat with ambient air according to the temperature and pressure of the refrigerant condensed or evaporated by the first heat exchanger 12, thereby discharging the heat-exchanged air to the outside according to the rotation of the blades. .

As a result, the refrigerant formed in the first space portion 10 and the surrounding air can discharge air to the outside through the upper surface of the main body 1 by heat exchange.

In addition, the first expansion valve 16 is a valve for reducing the pressure of the refrigerant in a high-pressure state in the first heat exchanger 12 serving as an evaporator during heating.

A first detection sensor 18 for sensing the temperature and pressure of the refrigerant flowing into the first heat exchanger 12 is further provided in the first space 10, and the first expansion valve 16 is By opening and closing according to the temperature and pressure sensed by the first detection sensor 18, the refrigerant flows or blocks.

Accordingly, when the first detection sensor 18 senses the temperature and pressure of the refrigerant, it opens and closes accordingly to convert the high-pressure refrigerant into a low-pressure state or block the flow.

Next, the second space 20 is a space located between the first space 10 and the third space 30 of the body 1 .

A second heat exchanger 22 , a second blowing fan 24 , a second expansion valve 26 , and the like are provided in the second space 20 .

The second heat exchanger 22 serves the same role as the first heat exchanger 12, and condenses the high-temperature, high-pressure gas refrigerant introduced by the compressor 32 into a liquid or converts it into a liquid. The refrigerant evaporates to a gaseous state.

Since the second heat exchanger 22 can also perform the two tasks described above, similarly to the first heat exchanger 12, it can serve as a condenser or evaporator depending on cooling or heating when operating the air conditioner of the present invention. can

The second heat exchanger 22 is installed to stand upright in the second space 20 , and four second heat exchangers 22 are mounted along the side surface of the second space 20 , respectively. do.

At this time, the second blowing fan 24 is mounted on the upper surface of the mounted four second heat exchangers 22 .

The second blower fan 24 exchanges heat with ambient air according to the temperature and pressure of the refrigerant condensed or evaporated by the second heat exchanger 22, thereby discharging the heat-exchanged air to the outside according to the rotation of the blades. .

At this time, it is preferable that the second blowing fan 24 is installed so that the rotating blades rotate in the left and right directions.

As a result, the refrigerant formed in the second space 20 and the surrounding air can discharge air to the outside through the side surface of the main body 1 by heat exchange.

The second expansion valve 26 is a valve for reducing the pressure of the refrigerant in a high-pressure state in the second heat exchanger 22 serving as an evaporator during heating.

This second expansion valve 26 serves the same role as the first expansion valve 16, and reduces the refrigerant pressure in a high pressure state and discharges it to the second heat exchanger 22 in a low pressure state through a connection pipe. do.

Likewise at this time, a second detection sensor 28 for detecting the temperature and pressure of the refrigerant flowing into the second heat exchanger 22 is further provided in the second space 20, and the second expansion valve ( 26) opens and closes according to the temperature and pressure sensed by the second detection sensor 28, thereby allowing or blocking the flow of refrigerant.

Accordingly, when the second detection sensor 28 senses the temperature and pressure of the refrigerant, it opens and closes accordingly to convert the high-pressure refrigerant into a low-pressure state or block the flow.

Hereinafter, the flow at the time of cooling or heating of the air conditioner of the present invention having the above configuration will be described in detail.

First, the refrigerant flow during cooling is as follows.

When power is applied to the main body 1, the compressor 32 operates and the refrigerant circulates.

The compressor 32 compresses the refrigerant flowing in from the liquid separator 36 through the refrigerant return pipe 33 and converts it into a high-temperature and high-pressure gaseous refrigerant.

At this time, as for the refrigerant flowing into the compressor 32 through the refrigerant return pipe 33 , only a gaseous refrigerant among refrigerants separated into a liquid and a gas in the liquid separator 36 is introduced.

Next, the gas refrigerant in the high-temperature and high-pressure state in the compressor 32 is introduced into the inlet pipe 380 of the four-way valve 38 through the refrigerant outlet pipe 34 .

Here, the direction control member of the four-way valve 38 is connected to the inlet pipe 380 and the first minute so that the refrigerant introduced through the inlet pipe 380 can move to the first heat exchanger 12 . To maintain the connection of the organ 381.

At this time, the second branch pipe 382 and the third branch pipe 383 form a blocked state with the inlet pipe 380 .

In addition, the second branch pipe 382 and the third branch pipe 383 maintain an open state so that the refrigerant can pass therethrough.

As described above, the refrigerant induced through the first branch pipe 381 flows into the first heat exchanger 12 through the connected pipe.

Here, the first heat exchanger 12 performs the same role as a condenser, and the high-temperature and high-pressure gas refrigerant introduced through the first branch pipe 381 is condensed into a liquid while passing through the first heat exchanger 12 . do.

At this time, the air heated by the condensed refrigerant is discharged from the upper surface of the main body 1 to the outside through the first blowing fan 14 .

Next, the refrigerant condensed by the first heat exchanger 12 is moved to the plate heat exchanger 40 through the first transfer tube 41 .

Then, the introduced refrigerant is discharged through the second transfer tube 42 and moves to the second expansion valve 26 .

At this time, since the fourth pipe 44 is provided in a portion of the second pipe 42 , a portion of the refrigerant moved to the second expansion valve 26 under the control of the solenoid valve 440 is transferred to the plate-type heat exchange. It is moved to the group (40).

Here, as the capillary tube 442 is further provided in the fourth pipe 44, the refrigerant is converted into a low-temperature and low-pressure state, and the converted refrigerant is transferred to the plate heat exchanger 40 through the fourth pipe 44. After being introduced, it is discharged through the third moving pipe 43 and thus flows into the inside of the compressor 32 .

Accordingly, it is possible to prevent the compressor 32 from being overheated when the air conditioner of the present invention operates.

Then, the refrigerant moved to the second space 20 through the second transfer tube 42 is converted into a liquid refrigerant in a low-temperature and low-pressure state by the second expansion valve 26 .

The second expansion valve 26 discharges the liquid refrigerant in a low-temperature and low-pressure state to the second heat exchanger 22 connected by a connecting pipe.

Here, the second heat exchanger 22 performs the same role as an evaporator, and converts the low-temperature and low-pressure liquid refrigerant introduced into the second heat exchanger 22 into low-temperature and low-pressure gaseous refrigerant.

Accordingly, the low-temperature and low-pressure gas refrigerant exchanges heat with the surrounding air, so that cool air is discharged to the outside through the second blowing fan 24 .

And, the refrigerant, which has become a gas refrigerant of low temperature and low pressure by the second heat exchanger 22, is introduced into the second branch pipe 382 of the four-way valve 38 through a connection pipe, and the second branch pipe ( The refrigerant in a low-temperature and low-pressure state is transferred to the liquid separator 36 through the third branch pipe 383 connected to and opened to 382 .

Then, the refrigerant introduced into the liquid separator 36 is again introduced into the compressor 32 and compressed to a high temperature and high pressure state, and the cooling operation can be continued by performing the series of processes described above. .

In the defrosting operation at this time, the high-temperature and high-pressure gas refrigerant discharged through the refrigerant discharge pipe 34 of the compressor 32 is introduced through the gas supply pipe 50 under the control according to the temperature of the gas valve 52 .

The refrigerant introduced through the gas supply pipe 50 moves to the second supply pipe 54 by the operation of a check valve mounted on the first supply pipe 53 and the second supply pipe 54 . .

And, the second heat exchanger 22 is prevented from freezing by discharging the high-temperature and high-pressure gas refrigerant through the nozzle of the second space 20 to perform defrosting.

Next, looking at the refrigerant flow during heating is as follows.

When power is applied to the main body 1, the compressor 32 operates and the refrigerant circulates.

The compressor 32 compresses the refrigerant flowing in from the liquid separator 36 through the refrigerant return pipe 33 and converts it into a high-temperature and high-pressure gaseous refrigerant.

At this time, as for the refrigerant flowing into the compressor 32 through the refrigerant return pipe 33 , only a gaseous refrigerant among refrigerants separated into a liquid and a gas in the liquid separator 36 is introduced.

Next, the gas refrigerant in the high-temperature and high-pressure state in the compressor 32 is introduced into the inlet pipe 380 of the four-way valve 38 through the refrigerant outlet pipe 34 .

The direction control member of the four-way valve 38 includes the inlet pipe 380 and the third branch pipe ( 383) is maintained.

At this time, the first branch pipe 381 and the second branch pipe 382 form a blocked state with the inlet pipe 380 .

In addition, the first branch pipe 381 and the second branch pipe 382 maintain an open state so that the refrigerant can pass therethrough.

As such, the refrigerant induced through the third branch pipe 383 is introduced into the second heat exchanger 22 through the connected pipe.

Here, the second heat exchanger 22 serves as a condenser, and the high-temperature and high-pressure gas refrigerant introduced through the third branch pipe 383 is condensed into a liquid while passing through the second heat exchanger 22 . do.

At this time, the air heated by the condensed refrigerant is discharged to the outside from the side of the main body 1 through the second blowing fan 24 to perform heating.

Then, the refrigerant condensed by the second heat exchanger 22 is moved to the plate heat exchanger 40 through the second transfer tube 42 .

Then, the introduced refrigerant is discharged through the first moving tube 41 and moves to the first expansion valve 16 .

At this time, since the fourth pipe 44 is provided in a portion of the second pipe 42 , a portion of the refrigerant moved to the second expansion valve 26 under the control of the solenoid valve 440 is transferred to the plate-type heat exchange. It is moved to the group (40).

Here, as the capillary tube 442 is further provided in the fourth pipe 44, the high-temperature refrigerant is converted into a low-temperature and low-pressure state, and the converted refrigerant is transferred to a plate heat exchanger ( 40) and then discharged through the third moving pipe 43, thereby flowing into the inside of the compressor 32.

Accordingly, it is possible to prevent the compressor 32 from being overheated when the air conditioner of the present invention operates.

Then, the refrigerant moved to the first space 10 through the first moving tube 41 is converted into a liquid refrigerant in a low-temperature and low-pressure state by the first expansion valve 16 .

The first expansion valve 16 moves the liquid refrigerant in a low-temperature and low-pressure state to the first heat exchanger 12 connected by a connecting pipe.

Here, the first heat exchanger 12 performs the same role as an evaporator, and converts the low-temperature and low-pressure liquid refrigerant introduced into the first heat exchanger 12 into low-temperature and low-pressure gaseous refrigerant.

Accordingly, the low-temperature and low-pressure gas refrigerant exchanges heat with the surrounding air, so that cool air is discharged to the outside through the first blowing fan 14 .

And, the refrigerant, which has become a gas refrigerant of low temperature and low pressure by the first heat exchanger 12, is introduced into the first branch pipe 381 of the four-way valve 38 through a connection pipe, and the first branch pipe ( The refrigerant in a low-temperature and low-pressure state is transferred to the liquid separator 36 through the second branch pipe 382 connected to and opened to 381 .

Then, the refrigerant introduced into the liquid separator 36 is again introduced into the compressor 32 and compressed to a high temperature and high pressure state, and the cooling operation can be continued by performing the series of processes described above. .

In the defrosting operation at this time, the high-temperature and high-pressure gas refrigerant discharged through the refrigerant discharge pipe 34 of the compressor 32 is introduced through the gas supply pipe 50 under the control according to the temperature of the gas valve 52 .

The refrigerant introduced through the gas supply pipe 50 moves to the first supply pipe 53 by the operation of a check valve mounted on the first supply pipe 53 and the second supply pipe 54 . .

In addition, the high-temperature and high-pressure gas refrigerant is discharged through the nozzle of the first space portion 10 to prevent the first heat exchanger 12 from freezing to perform defrosting.

Accordingly, cooling and heating operations can be performed by the air conditioner of the present invention in which the outdoor unit is integrally provided.

The scope of the present invention is not limited to the embodiments illustrated above, and many other modifications based on the present invention will be possible for those skilled in the art within the above technical scope.

1. Main body 10. First space
12. 1st heat exchanger 14. 1st blowing fan
16. First expansion valve 18. First detection sensor
20. Second space 22. Second heat exchanger
24. 2nd blower fan 26. 2nd expansion valve
28. Second detection sensor 30. Third space
32. Compressor 33. Refrigerant return pipe
34. Refrigerant discharge pipe 36. Liquid separator
38.4 way valve 40. plate heat exchanger
41. Moving tube 1 42. Moving tube 2
43. 3rd Migration Hall 44. 4th Migration Hall
50. Gas supply pipe 52. Gas valve
53. 1st supply pipe 54. 2nd supply pipe
380. Inlet pipe 381. First branch pipe
382. Branch 2 383. Branch 3
440. Solenoid valve 442. Capillary tube

Claims (5)

In the air conditioner having an external shape by a main body and having a first space, a second space, and a third space formed therein by a partition plate,
a compressor provided in the third space and compressing the refrigerant into a high-temperature, high-pressure gaseous state;
a liquid separator provided in the third space and separating a liquid from a liquid refrigerant mixed with a liquid among the refrigerant flowing to the compressor;
a plurality of first heat exchangers provided in the first space and condensing the high-temperature and high-pressure gas refrigerant introduced by the compressor or evaporating the liquid refrigerant into a gaseous state;
a first blowing fan provided in the first space and blowing the gas condensed or evaporated by the first heat exchanger;
a plurality of second heat exchangers provided in the second space and condensing the high-temperature and high-pressure gas refrigerant introduced by the compressor or evaporating the liquid refrigerant into a gaseous state;
a second blowing fan provided in the second space and blowing the gas condensed or evaporated by the second heat exchanger;
an expansion valve configured to depressurize the condensed refrigerant, a first expansion valve provided in the first space portion, and a second expansion valve provided in the second space portion;
An integrated structure air conditioner comprising a; a four-way valve that switches the flow of refrigerant during cooling or heating operation. The method of claim 1,
The cooling cycle at the time of cooling operation is,
A compressor that compresses the refrigerant and converts it into a high-temperature and high-pressure gaseous state;
a first heat exchanger for condensing the high-temperature and high-pressure gaseous refrigerant by moving the gaseous refrigerant converted into high-temperature and high-pressure by the compressor through the four-way valve;
a second expansion valve for reducing the pressure of the refrigerant condensed into a liquid by the first heat exchanger to convert it into a low-temperature and low-pressure liquid;
a second heat exchanger for evaporating the liquid refrigerant in a low-temperature and low-pressure state by the second expansion valve and vaporizing it into a gas refrigerant in a low-temperature and low-pressure state;
A liquid separator that separates a liquid from a liquid refrigerant mixed with a liquid among the refrigerants in a low-temperature and low-pressure state in the second heat exchanger is sequentially circulated,
The refrigerant in the gaseous state separated from the liquid in the liquid separator is introduced into the compressor again to repeat a series of processes,
The air heated by the refrigerant condensed from the first heat exchanger is discharged to the outside through the first blowing fan, and the air cooled by the refrigerant vaporized from the second heat exchanger is external through the second blowing fan. An integrated structure air conditioner and its control method, characterized in that it is discharged through a The method of claim 1,
The heating cycle at the time of the heating operation,
A compressor that compresses the refrigerant and converts it into a high-temperature and high-pressure gaseous state;
a second heat exchanger for condensing the high-temperature and high-pressure gaseous refrigerant by moving the gaseous refrigerant converted into high-temperature and high-pressure by the compressor through the four-way valve;
a first expansion valve for reducing the pressure of the refrigerant condensed into a liquid by the second heat exchanger and converting it into a low-temperature and low-pressure liquid;
a first heat exchanger for evaporating the liquid refrigerant in a low-temperature and low-pressure state by the first expansion valve and vaporizing it into a gas refrigerant in a low-temperature and low-pressure state;
A liquid separator that separates a liquid from a liquid refrigerant mixed with a liquid among the refrigerants in a low-temperature and low-pressure state in the first heat exchanger is sequentially circulated,
The refrigerant in the gaseous state separated from the liquid in the liquid separator is introduced into the compressor again to repeat a series of processes,
The air heated by the refrigerant condensed from the second heat exchanger is discharged to the outside through the second blowing fan, and the air cooled by the refrigerant vaporized from the first heat exchanger is discharged to the outside through the first blowing fan. An integrated structure air conditioner and its control method, characterized in that it is discharged through a According to claim 1, wherein the third space portion,
a first pipe through which the refrigerant is discharged or flows from the first heat exchanger; a second pipe through which the refrigerant is discharged or introduced from the second heat exchanger; and a third pipe through which the refrigerant flows into the compressor; a plate-type heat exchanger with four holes formed so as to be connected to a part of the moving pipe and to a fourth pipe through which a portion of the refrigerant moving through the second pipe is introduced is further provided;
the first pipe and the second pipe are connected through the plate heat exchanger, and the third pipe and the fourth pipe are connected through the plate heat exchanger;
The fourth transfer tube further includes a capillary for decompressing the condensed refrigerant to a low-temperature and low-pressure state, and an electromagnetic valve for controlling the flow of refrigerant moving to the capillary according to the temperature and pressure of the compressor. The integrated structure air conditioner, characterized in that the refrigerant flowing into the fourth pipe passes through the capillary pipe, and is converted into a low-temperature and low-pressure state and flows into the compressor through the third pipe. The method of claim 4, wherein on one surface of the compressor,
a refrigerant return pipe for recovering the gaseous refrigerant from the liquid separator;
a refrigerant discharge pipe for discharging the refrigerant compressed in a state of high temperature and high pressure by compression;
A gas supply pipe for performing a defrosting operation by discharging a high-temperature and high-pressure gaseous refrigerant to the first heat exchanger or the second heat exchanger is provided on one surface of the refrigerant discharge pipe.

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