KR101218862B1 - Multi-type air conditioner for cooling/heating the same time - Google Patents

Abstract

The present invention relates to a simultaneous air-conditioning type multi air conditioner, and more particularly, to a cooling and air-conditioning type multi air conditioner in which a coolant is stagnated in a high-pressure gas phase refrigerant pipe during the operation of a cooling-discharge chamber.

Air conditioner simultaneous air-conditioning multi-air conditioner according to the present invention; A plurality of indoor units connected to the outdoor unit; A distributor configured to connect the outdoor unit to the indoor unit, and to distribute the refrigerant to the plurality of indoor units according to operating conditions at the same time as the cooling discharge chamber, the heating chamber, the cooling main body, or the heating main body; A high pressure gas refrigerant pipe connecting the outdoor unit to the distributor and capable of flowing a high pressure gaseous refrigerant discharged from a compressor; And a control device for selectively allowing the refrigerant to flow into the high pressure gas refrigerant pipe according to the operating condition.

According to the present invention, as a control device is provided to prevent the refrigerant from flowing into the high-pressure gas coolant pipe during the operation of the cooling-discharge chamber, refrigerant such as a compressor is generated by the condensation refrigerant generated by stagnating in the high-pressure gas coolant pipe. It is possible to prevent the phenomenon of being insufficient and to improve the cooling efficiency.

Refrigerant control valve

Description

Multi-type air conditioner for cooling / heating the same time}

1 is a block diagram of a simultaneous air-conditioning multi air conditioner according to the spirit of the present invention.

Fig. 2 is an operational state diagram at the time of operating the air conditioner of the air conditioner.

Fig. 3 is an operational state diagram of a switching unit at the time of cooling and discharging chamber operation or cooling main body simultaneous operation of the air conditioner.

4 is an operational state diagram at the time of simultaneous operation of the cooling main body of the air conditioner.

5 is an operational state diagram at the time of heating all rooms of the air conditioner.

6 is an operational state diagram of a switching unit at the time of heating the whole room of the air conditioner or the simultaneous operation of the heating main body.

7 is an operational state diagram at the time of simultaneous heating main operation of the air conditioner.

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

10: outdoor unit 20: distributor

30: indoor unit 140: first connection piping

150: second connection pipe 160: third connection pipe

170: refrigerant control valve

The present invention relates to a simultaneous air-conditioning type multi air conditioner, and more particularly, to a cooling and air-conditioning type multi air conditioner in which a coolant is stagnated in a high-pressure gas phase refrigerant pipe during the operation of a cooling-discharge chamber.

In general, an air conditioner is a device for cooling or heating an interior space of a building or the like. Today, an air conditioner is a multi-air conditioner that cools or heats each room in order to more efficiently cool or heat an interior space divided into a plurality of rooms. The development of the flag continues.

The multi-air conditioner is configured in such a way that a plurality of indoor units are connected to one outdoor unit, and each indoor unit is installed in each room, thereby operating in any one operation mode of heating and cooling to air condition the room.

However, in the case of the conventional multi-air conditioner, since the device is operated only in the cooling mode or the heating mode, among the plurality of rooms partitioned indoors, which one needs heating and the other room does not meet the cooling requirement. There was a problem.

As a result, according to this necessity, each room can be individually air-conditioned at the same time during operation of the apparatus, that is, the indoor unit installed in the room where heating is required is operated in the heating mode, and at the same time, the room is required to be installed therein. There is a need for the development of a simultaneous air-conditioning multi-air conditioner that operates a cooling mode in an indoor unit.

The present invention has been proposed in the background as described above, and an object of the present invention is to propose a simultaneous air-conditioning multi-air conditioner, which allows heating and cooling operations to be simultaneously performed.

In addition, in the case where all of the plurality of rooms are operated in a cooling operation, an object of the present invention is to propose a cooling and heating simultaneous multi air conditioner in which a phenomenon in which the amount of circulating refrigerant is insufficient as the refrigerant is stagnated in a predetermined refrigerant pipe is prevented.

According to the present invention for achieving the above object, the air-conditioning simultaneous multi-air conditioner is an outdoor unit; A plurality of indoor units connected to the outdoor unit; A distributor configured to connect the outdoor unit to the indoor unit, and to distribute the refrigerant to the plurality of indoor units according to operating conditions at the same time as the cooling discharge chamber, the heating chamber, the cooling main body, or the heating main body; A high pressure gas refrigerant pipe connecting the outdoor unit to the distributor and capable of flowing a high pressure gaseous refrigerant discharged from a compressor; And an adjusting device for selectively flowing the refrigerant into the high pressure gas coolant pipe according to the operating condition, wherein the control device closes the high pressure gas coolant pipe during the operation of the cooling and discharging chamber, and the control device during other operation. Is characterized in that for opening the high-pressure gas refrigerant pipe.

According to another aspect of the present invention, there is provided an air conditioner including a compressor and an outdoor heat exchanger. A plurality of indoor units each having an indoor heat exchanger therein; A distributor configured to connect the outdoor unit to the indoor unit, and to distribute the refrigerant to the plurality of indoor units according to operating conditions at the same time as the cooling discharge chamber, the heating chamber, the cooling main body, or the heating main body; A first connection pipe allowing the refrigerant to flow between the compressor and the outdoor heat exchanger; A second connection pipe allowing the refrigerant to flow between the compressor and the indoor heat exchanger; And a control valve for controlling the flow of the refrigerant in the second connection pipe according to the operating condition, wherein the control valve closes the second connection pipe during the cooling / discharging chamber operation, and the control valve in other operations. And opening the second connection pipe.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

1 is a block diagram of a simultaneous air-conditioning multi air conditioner according to the spirit of the present invention.

Referring to Figure 1, the simultaneous heating and cooling air-conditioning multi-air conditioner according to the spirit of the present invention is characterized in that all the rooms can be operated by cooling or heating in addition to some of the room is operated in the air while the other room can be operated by heating. do.

That is, the heating and cooling simultaneous multi-air conditioner according to the spirit of the present invention is a heating room operation for heating the whole of each room, a simultaneous operation of heating subjects for cooling part of the entire room at the same time, and an air conditioning room operation for cooling the entire room. And, part of the whole of the room is configured to enable the cooling main body simultaneous operation for heating at the same time.

In order to enable such operation, the air-conditioning simultaneous multi-air conditioner according to the present invention includes an outdoor unit 10 installed outdoors, a plurality of indoor units 30 installed in each room, and the outdoor unit 10 and the A distributor 20 for connecting the indoor unit 30 is included.

The outdoor unit 10 includes a compressor 110 and an outdoor heat exchanger 130. The distributor 20 includes a guide pipe unit connecting the outdoor unit 10 and the indoor unit 30 to the outdoor unit 10. The valve unit for controlling the refrigerant flow of the piping unit is provided, each indoor unit 30 is provided with an indoor heat exchanger 310, an electromagnetic expansion valve 320 and the like.

Hereinafter, each configuration and function of the outdoor unit 10, the distributor 20, and the indoor unit 30 will be described in detail.

First, the outdoor unit 10 includes a compressor 110, an accumulator 112 for introducing a gaseous refrigerant into the compressor 110, and a compressor connected to the compressor 110 to transfer the refrigerant to the distributor 20. A piping unit for guiding or guiding the refrigerant of the distributor 20 to the compressor 110 and a switching unit provided on the piping unit in the outdoor unit 10 to switch the flow of the refrigerant according to the operating state of the air conditioner. 120 is included.

In detail, the piping unit includes a first connection pipe 140 connecting the discharge end of the compressor 110 and the outdoor heat exchanger 130 and connecting the outdoor heat exchanger 130 and the distributor 20. A second connection pipe 150 connecting only the front end side 141 of the first connection pipe 140 and the distributor 20 to guide only a refrigerant of a high-pressure gas state, and a suction end of the compressor 110; It consists of a third connecting pipe 160 for connecting the distributor 20.

On the other hand, the switching unit 120 is a four-way valve 122 provided on the section between the second connection pipe 150 and the outdoor heat exchanger 130 of the first connection pipe 140, and the four-way valve An auxiliary connecting pipe 124 connecting the 122 and the third connecting pipe 160 and the four-way valve 122 are provided in the valve body inside the heating chamber or the heating main body at the same time (see 128 in FIG. 3). It is composed of a pressure closing tube 126 for guiding and blocking a predetermined amount of refrigerant so that one side of the) continues to be pressurized. The operation of the valve body (see 128 in FIG. 3) will be described later with reference to the drawings.

Due to the structure of the piping unit and the switching unit 120, the section 143 between the outdoor heat exchanger 130 and the distributor 20 in the first connection pipe 140 is the outdoor heat exchanger ( 130 is specified as a "high pressure liquid refrigerant section" through which the refrigerant changed into a high-pressure liquid state is formed by performing heat exchange with the outside air sucked into the outdoor unit 10 while flowing inside the 130.

In addition, the second connection pipe 150 is specified as a "high pressure gas refrigerant section" through which the refrigerant changed into a high-pressure gas phase state as it passes through the compressor 110.

In addition, the third connection pipe 160 flows through the interior of the indoor heat exchanger 310 and exchanges heat with the air sucked into the indoor unit 30 to flow the refrigerant changed into a low-pressure gaseous state. Is specified. A detailed description thereof may be clearly understood through the following operation description.

On the other hand, during the simultaneous operation of the cooling chamber or the cooling main body, the refrigerant discharged from the outdoor heat exchanger 130 continues to flow into the distributor 20 along the high pressure liquid refrigerant section 143 of the first connection pipe 140. In the heating chamber or the simultaneous heating operation, the refrigerant flowing into the outdoor heat exchanger 130 is preferably expanded to be introduced therein.

To this end, the present invention is provided in the high-pressure liquid refrigerant section 143 of the first connection pipe 140 to block the flow of the refrigerant during the heating chamber or heating main simultaneous operation, during the simultaneous operation of the cooling discharge chamber or cooling main body A check valve 172 allowing the refrigerant to pass through, and parallel to the high-pressure liquid refrigerant section 143 at the boundary of the check valve 172 to guide the flow of the refrigerant during the heating chamber or heating main body simultaneous operation. A pipe 174 is provided in the parallel pipe 174, and further includes a heating electronic expansion valve 176 for expanding the refrigerant flowing into the outdoor heat exchanger 130 during the heating chamber or the heating main body simultaneous operation. .

Meanwhile, the distributor 20 guides the refrigerant introduced along the first connection pipe 140 or the second connection pipe 150 of the outdoor unit 10 to the indoor units 30, and the indoor units ( Guide pipe parts 210 to 230 for guiding the refrigerant heat exchanged at 30) to the first connection pipe 140 or the third connection pipe 160 of the outdoor unit 10 according to the operating conditions of the air conditioner. It is composed of a valve unit 240 for controlling the flow of the refrigerant in the guide pipes 210 to 230 so that the refrigerant selectively enters the plurality of indoor units (30).

In detail, the guide pipes 210 to 230 are connected to the high pressure liquid refrigerant section 143 of the first connection pipe 140 to guide the high pressure liquid refrigerant connection pipe 210 to guide the high pressure liquid refrigerant, and the high pressure. It is branched from the liquid refrigerant connection pipe 210 and connected to the high-pressure liquid refrigerant branch pipes 211, 212 and 213 connected to the indoor units 30, and the second connection pipe 150 to guide the high-pressure gaseous refrigerant. The high pressure gas refrigerant refrigerant connection pipe 230, the high pressure gas refrigerant refrigerant connection pipe 230 is branched from the high pressure gas refrigerant refrigerant pipes 231, 232, 233 connected to each indoor unit 30, and the high pressure gas refrigerant Low pressure gaseous refrigerant branch pipes 221, 222, and 223 connected in parallel with branch pipes 231, 232, and 233 to guide low-pressure gaseous refrigerants, and the low pressure gaseous refrigerant branch pipes 221, 222, and 223, respectively. A low pressure gas refrigerant refrigerant connection pipe 220 is connected to the first connection pipe 160 to be laminated to one.

The valve unit 240 includes the high pressure valve units 241, 242, and 243 formed in the high pressure gas refrigerant branch pipes 231, 232, and 233, and the low pressure gas refrigerant branch pipes 221 and 222. , And low pressure valve parts 244, 245, and 246, which are provided in the air conditioners 223, respectively, are selectively turned on and off according to operating conditions of the air conditioner.

The indoor unit 30 includes an indoor heat exchanger 310 and an electromagnetic expansion valve 320 provided between the high pressure liquid refrigerant branch pipes 211, 212, and 213 and the gas phase refrigerant branch pipe, and the indoor heat exchanger. An indoor fan (not shown) is included to force the indoor air to be blown to the device 310.

By such a configuration, the refrigerant flows through the low pressure gas refrigerant pipe during the operation of the cooling chamber, and the refrigerant flows through the high pressure gas refrigerant pipe during the operation of the heating chamber.

That is, the high pressure valve part is closed during the operation of the cooling chamber, the low pressure valve part is opened, the refrigerant flows into the low pressure gas coolant pipe, and the low pressure valve part is closed during the heating chamber operation, and the high pressure valve part is opened. The refrigerant flows into the high pressure gas refrigerant pipe.

However, the refrigerant discharged from the compressor 110 during the operation of the cooling and discharge chamber is introduced into the indoor unit 30 through the first connection pipe 140 and the second connection pipe 150, and the second connection pipe 150. Since the high pressure valve parts 241, 242, and 243 are closed, the refrigerant introduced into the main body is stagnated in the second connection pipe 150.

As such, when time passes while the refrigerant introduced into the second connection pipe 150 is stagnant therein, the refrigerant is condensed inside the second connection pipe 150 and circulated by the amount of the condensed refrigerant. Since the amount of the refrigerant is reduced, there may be a problem that the cooling performance is reduced.

Therefore, in the present invention, in order to prevent the refrigerant from flowing into the second connection pipe 150 when the air conditioner is operated in the cooling and discharging chamber, the refrigerant control valve 170 is provided in the second connection pipe 150. .

The refrigerant control valve 170 is configured to be closed during the operation of the cooling chamber, and configured to open during other operations.

Hereinafter, with reference to Figures 2 to 7 will be described the operation of the air-conditioning simultaneous multi-air conditioner according to the spirit of the present invention.

FIG. 2 is an operation state diagram of the air conditioner when the air conditioner is operated, and FIG. 3 is an operation state diagram of the switching unit during the air conditioner operation or the cooling main body simultaneous operation of the air conditioner.

2 and 3, when the air conditioner is operated in the cooling chamber, the high pressure valve portions 241, 242, and 243 of the high pressure gas refrigerant branch pipes 231, 232, and 233 are closed, and the low pressure gas refrigerant is closed. The low pressure valve portions 244, 245, 246 of the branch pipes 221, 222, 223 are opened.

The high-pressure gaseous phase refrigerant discharged from the compressor 110 flows along the front end side 141 of the first connection pipe 140, and then the rear end side 142 of the first connection pipe 140 by the switching unit 120. Inflow).

On the other hand, the refrigerant control valve 170 provided in the second connection pipe 150 is closed so that the refrigerant discharged from the compressor 110 does not flow to the second connection pipe 150.

As described above, as the refrigerant is not introduced into the second connection pipe 150, the phenomenon in which the refrigerant is condensed in the second connection pipe 150 and the circulation refrigerant is insufficient is prevented.

The refrigerant introduced into the rear end side of the first connection pipe 140 is condensed while passing through the outdoor heat exchanger 130. The refrigerant condensed while passing through the outdoor heat exchanger 130 is introduced into the distributor 20 along the high pressure liquid refrigerant section 143 of the first connection pipe 140 via the check valve 172. At this time, the heating electromagnetic expansion valve 176 is of course in a closed state.

The refrigerant introduced into the distributor 20 flows into the high pressure liquid refrigerant connection pipe 210, and the refrigerant introduced into the high pressure liquid refrigerant connection pipe 210 is the high pressure liquid refrigerant branch pipe 211 and 212. 213) is expanded while passing through each of the indoor electromagnetic expansion valves 320 and evaporated through each of the indoor heat exchangers 310 to cool each room.

Thereafter, the evaporated refrigerant passes through each of the low pressure gas refrigerant branch pipes 221, 222, and 223, is laminated in the low pressure gas refrigerant refrigerant pipe 220, and then sucked into the compressor 110.

Here, the valve body 128 inside the switching unit 120 is moved to the right side by an electric force (not shown, the force used to initially operate the valve body), and at the same time the refrigerant discharged from the compressor 110 The valve body 128 is moved to one side by the pressure of the front end side 141 and the rear end side 142 of the first connection pipe 140 is connected. At the same time, while the refrigerant is discharged to the rear end of the first connecting pipe 140, while continuously pressurizing the valve body 128 to one side of the refrigerant to the outdoor heat exchanger 130 located on the rear end side of the first connecting pipe 140. Will change the flow.

On the other hand, as the valve body 128 is moved to the right side, the auxiliary connecting pipe 124 and the pressurized closing pipe 126 are connected by the flow path 129 in the valve body 128 so that the refrigerant does not flow. I can't. Therefore, the refrigerant flowing into the third connection pipe 160 is smoothly guided to the suction end of the compressor 110.

4 is an operational state diagram at the time of simultaneous operation of the cooling main body of the air conditioner.

Referring to FIG. 4, in the case of a cooling main body simultaneous operation, in a room where cooling operation is required, the low pressure valve portions 244 and 245 of the low pressure gas refrigerant branch pipes 221 and 222 are opened to open the low pressure gas refrigerant. In the case where the refrigerant flows to the branch pipes 221 and 222 and the heating operation is required, the high pressure valve portion 243 of the high pressure gas refrigerant branch pipe 233 is opened to the high pressure gas refrigerant branch pipe 243. The refrigerant flows.

As such, the refrigerant control valve of the second connection pipe 150 is opened to allow the refrigerant to flow into the high pressure gas refrigerant branch pipe 233.

In detail, the high-pressure gaseous refrigerant discharged from the compressor 110 flows along the front end side 141 of the first connection pipe 140, and part of the distributor 20 is along the second connection pipe 150. It is introduced into the high pressure gas refrigerant connection pipe (230). On the other hand, the rest of the flow continues along the rear end side 142 of the first connection pipe 140 by the switching of the switching unit 120 and then flows into the outdoor heat exchanger 130 to condense. Then, the condensed high pressure refrigerant passes through the check valve 172 and flows into the high pressure liquid refrigerant connection pipe 210 of the distributor 20 along the high pressure liquid refrigerant section 143 of the first connection pipe 140. do.

In addition, the refrigerant introduced into the high pressure liquid refrigerant connection pipe 210 of the distributor 20 is branched into the first and second high pressure liquid refrigerant branch pipes 211 and 212, and then the first and second indoor side expansion valves 321. , 322 is expanded and evaporated while passing through the first and second indoor heat exchangers 311 and 312 to cool each room.

Thereafter, the evaporated refrigerant flows along the first and second low pressure gas refrigerant refrigerant pipes 221 and 222 and is collected in the low pressure gas refrigerant refrigerant pipe 220. Then, the refrigerant is sucked into the compressor 110.

At the same time, the refrigerant introduced into the high pressure gas refrigerant connection pipe 230 of the distributor 20 flows into the third high pressure gas refrigerant refrigerant pipe 233 and then passes through the third indoor heat exchanger 313 to require heating. After the room is heated, it is joined to the high pressure liquid refrigerant connection pipe 210 through the opened third indoor expansion valve 323 and the third high pressure liquid refrigerant branch pipe 213.

That is, the refrigerant used for heating is branched into the first and second high pressure liquid refrigerant branch pipes 211 and 212 as necessary and used to cool each room.

Fig. 5 is an operational state diagram of the air conditioner at the time of heating the whole room, and Fig. 6 is an operation state diagram of the switching unit at the time of heating the whole room operation of the air conditioner or the simultaneous operation of the heating main body.

5 and 6, when the air conditioner is operated in the heating room, the low pressure valve parts 244, 245, and 246 of the low pressure gas refrigerant branch pipes 221, 222, and 223 are closed, and the high pressure gas refrigerant is closed. The high pressure valve portions 241, 242, 243 of the branch pipes 231, 232, 233 are opened.

As such, the refrigerant control valve 170 of the second connection pipe 150 is opened to allow the refrigerant to flow into the high pressure gas refrigerant branch pipes 231, 232, and 233.

The high-pressure gaseous refrigerant discharged from the compressor 110 flows along the front end side 141 of the first connection pipe 140 and does not go through the outdoor heat exchanger 130 by switching of the switching unit 120. The high pressure gas refrigerant connecting pipe 230 of the distributor 20 passes through the second connection pipe 150 in a high pressure gas state.

In addition, the refrigerant introduced into the high pressure gas refrigerant refrigerant connection pipe 230 of the distributor 20 flows into the high pressure gas refrigerant refrigerant pipes 231, 232, and 233, and passes through each indoor heat exchanger 310. It condenses with heating.

After that, the condensed refrigerant flows along the high-pressure liquid refrigerant branch pipes 211, 212, and 213 after passing through the open-side electronic expansion valve 320, and is collected into the high-pressure liquid refrigerant connection pipe 210. In addition, the refrigerant collected in the high pressure liquid refrigerant connection pipe 210 flows along the high pressure liquid refrigerant section 143 of the first connection pipe 140, and then shuts off the check valve 172 to provide the heating electromagnetic expansion valve ( 176 is expanded and evaporated through the outdoor heat exchanger (130).

In addition, the evaporated refrigerant flows along the rear end side 142 of the first connection pipe 140 and is connected to the auxiliary connection pipe 124 and the third connection pipe (low pressure gas phase refrigerant section) by the four-way valve 122 that is already switched. : 160 is sequentially passed through the compressor 110.

Here, the valve body 128 of the switching unit 120 is moved a predetermined amount to the left by an electric force, and at the same time the valve body 128 is moved to the left by the pressure of the refrigerant discharged from the compressor 110. While the front end side 141 of the first connecting pipe 140 and the closing tube for pressure 126 is connected. At the same time, the refrigerant is moved to the pressurized closing tube 126 by a predetermined amount to shut off, thereby maintaining pressure and continuously pressurizing the valve body 128 to the left.

On the other hand, as the valve body 128 moves to the left side, the rear end side 142 of the first connecting pipe 140 and the auxiliary connecting pipe 124 are connected by the flow path 129 in the valve body 128. The low pressure gas phase refrigerant flowing from the outdoor heat exchanger 130 moves to the suction side of the compressor 110.

7 is an operation state diagram at the time of simultaneous heating main operation of the air conditioner.

Referring to FIG. 7, in a room in which a cooling operation is required in the simultaneous heating operation of the heating main body, the low pressure valve portion 246 of the low pressure gas refrigerant branch pipe 223 is opened to open the low pressure gas refrigerant refrigerant pipe 223. In the case where the refrigerant flows and the heating operation is required, the high pressure valve portions 241 and 242 of the high pressure gas refrigerant branch pipes 231 and 232 are opened to the high pressure gas refrigerant branch pipes 231 and 232. The refrigerant flows.

As such, the refrigerant control valve 170 of the second connection pipe 150 is opened to allow the refrigerant to flow into the high pressure gas refrigerant branch pipes 231 and 232.

The high-pressure gaseous refrigerant discharged from the compressor 110 flows along the front end side 141 of the first connection pipe 140 and does not go through the outdoor heat exchanger 130 by switching of the switching unit 120. The high pressure gas refrigerant connecting pipe 230 of the distributor 20 passes through the second connection pipe 150 in a high pressure gas state.

The refrigerant introduced into the high pressure gas refrigerant connection pipe 230 is branched into the first and second high pressure gas refrigerant refrigerant pipes 231 and 232, and then passes through the first and second indoor heat exchangers 311 and 312, respectively. Each room is heated and condensed.

After that, the condensed refrigerant flows through the first and second indoor expansion valves 321 and 322 and then flows through the first and second high pressure liquid refrigerant branch pipes 211 and 212 and the high pressure liquid refrigerant connection pipe 210. Are gathered together. At this time, a part of the condensed refrigerant flows along the high pressure liquid refrigerant connection pipe 210 and then flows into the high pressure liquid refrigerant section 143 of the first connection pipe 140 to block the check valve 172. As it passes through the electronic expansion valve 176 for heating and is evaporated while passing through the outdoor heat exchanger (130). Then, the evaporated refrigerant flows into the rear end side 142 of the first connecting pipe 140, the auxiliary connecting pipe 124 and the third connecting pipe (low pressure gas refrigerant section: by the four-way valve 122 already switched: While passing through 160 sequentially, it is introduced into the compressor 110.

Meanwhile, the remaining part of the condensed refrigerant flows into the third high pressure liquid refrigerant branch pipe 213, expands through the third indoor side electromagnetic expansion valve 323, and passes through the third indoor heat exchanger 313. While evaporating to cool the room requiring cooling. Thereafter, the evaporated refrigerant is introduced into the low pressure gas refrigerant connection tube 220 through the third low pressure gas refrigerant branch pipe 223. Thereafter, the refrigerant introduced into the low pressure gas refrigerant connection pipe 220 is sucked into the compressor 110.

That is, the refrigerant used for heating is used to cool the room where cooling is required after a part is branched into the third high pressure liquid refrigerant branch pipe 213.

Therefore, by providing a heating and cooling simultaneous multi-air conditioner according to the present invention, all the heating operation to heat the entire room according to the environment of each room, the heating subject simultaneous operation to simultaneously cool a part of the whole room, each room The cooling and discharging chamber operation for cooling the whole, and the cooling main body simultaneous operation for heating a part of the whole room at the same time are possible.

In addition, the refrigerant control valve 170 is provided to prevent the refrigerant from flowing into the high-pressure gas refrigerant connection pipe 230 during the operation of the cooling-discharge chamber, so that the amount of the circulating refrigerant is insufficient to decrease the cooling performance. It becomes possible to prevent it.

According to the present invention as proposed has the following effects.

First, the heating room operation that heats the whole room, the simultaneous operation of the heating main body that cools a part of the whole room at the same time, the air conditioning room operation that cools the whole room, and the cooling main body that heats part of the whole room at the same time. As simultaneous operation is possible, there is an effect capable of optimally responding to the environment of each room.

Second, as the refrigerant control valve is provided to prevent the refrigerant from flowing into the high pressure gas coolant pipe during the operation of the cooling and discharging chamber, it is possible to prevent the refrigerant from running short in the high pressure gas coolant pipe due to the condensation of the refrigerant. At the same time, the cooling efficiency can be improved.

Claims (6)

Outdoor unit; A plurality of indoor units connected to the outdoor unit; A distributor configured to connect the outdoor unit to the indoor unit, and to distribute the refrigerant to the plurality of indoor units according to operating conditions at the same time as the cooling discharge chamber, the heating chamber, the cooling main body, or the heating main body; A high pressure gas refrigerant pipe connecting the outdoor unit to the distributor and capable of flowing a high pressure gaseous refrigerant discharged from a compressor; And And a control device for selectively allowing the refrigerant to flow into the high pressure gas refrigerant pipe according to the operating condition. And the control device closes the high pressure gas coolant pipe during operation of the cooling and discharge chamber, and the control device opens the high pressure gas coolant pipe during other operations. The method of claim 1, The regulating device is a heating and cooling simultaneous multi air conditioner, characterized in that the on-off valve for selectively opening and closing the high-pressure gas refrigerant pipe. delete An outdoor unit having a compressor and an outdoor heat exchanger therein; A plurality of indoor units each having an indoor heat exchanger therein; A distributor configured to connect the outdoor unit to the indoor unit, and to distribute the refrigerant to the plurality of indoor units according to operating conditions at the same time as the cooling discharge chamber, the heating chamber, the cooling main body, or the heating main body; A first connection pipe allowing the refrigerant to flow between the compressor and the outdoor heat exchanger; A second connection pipe allowing the refrigerant to flow between the compressor and the indoor heat exchanger; And It includes a control valve for controlling the flow of the refrigerant of the second connecting pipe in accordance with the operating conditions, And the control valve closes the second connection pipe during operation of the cooling and discharging chamber, and the control valve opens the second connection pipe in other operations. delete 5. The method of claim 4, And a third connection pipe provided at the suction end of the compressor to connect the compressor and the indoor heat exchanger.

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