KR100447203B1 - Multi-type air conditioner for cooling/heating the same time and method for controlling the same - Google Patents

Abstract

The present invention provides a cooling / heating simultaneous multi-air conditioner and a method of controlling the same, wherein heating and cooling operations are performed simultaneously, and the high-pressure refrigerant flows only two high-pressure refrigerants regardless of operating conditions. It is to improve the air-conditioning efficiency by specifying the section and the low pressure section where only the low pressure refrigerant flows.

To this end, the present invention, an outdoor unit having a compressor, an outdoor heat exchanger and an outdoor fan, a plurality of indoor units each installed in each room of the room, and the refrigerant introduced from the outdoor unit is separated from the gas-liquid separator in accordance with the operating conditions. A distributor for selectively guiding indoor units, a connecting pipe unit provided inside / outside of the outdoor unit and selectively guiding refrigerant according to operating conditions, and the gas-liquid separator side pipe of the connecting pipe unit is a high-pressure section of the compressor. The piping of the suction side of the mixing unit is a bypass unit for bypassing the refrigerant during the heating chamber and the heating main body at the same time so as to be specified as the low pressure section, and the mixing ratio of the gaseous refrigerant and the liquid refrigerant flowing into the gas-liquid separator of the distributor through the outdoor heat exchanger. The rotation speed of the outdoor fan is controlled so that the cooling fan and the cooling main body can be adjusted according to the operating conditions. Made includes the control means.

Description

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

The present invention relates to a multi-air conditioner, and more particularly to a cooling and heating simultaneous multi-air conditioner.

In general, an air conditioner is a device for cooling or heating an indoor space such as a living space, a restaurant, or an office, and today, each room is cooled in order to more efficiently cool or heat an indoor space divided into a plurality of rooms. Or the development of a multi-air conditioner for heating operation is continuously made.

In particular, such a multi-air conditioner, 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, among several rooms partitioned indoors, even when one room needs to be heated and the other room needs to be cooled, the device is operated in the cooling mode or the heating mode uniformly. .

For example, in a building, there may be a temperature difference depending on the location or time of the room, i.e. the north side room of the building requires heating, while the south side room requires cooling due to sunlight. There was a limitation that the device could not respond to these demands.

In addition, even when a computer room is provided, cooling is always required to solve the heating load of the computer equipment in summer as well as in winter, but there is a limit that the device cannot respond to such a demand.

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

Based on the above-mentioned necessity, an object of the present invention is to provide a cooling / heating simultaneous multi-air conditioner in which heating operation and cooling operation are simultaneously performed and a control method thereof.

Another object of the present invention is to improve air-conditioning efficiency by specifying two pipes of an outdoor unit connected to a distributor to a high pressure section flowing only a high pressure refrigerant and a low pressure section flowing only a low pressure refrigerant regardless of operating conditions.

Still another object of the present invention is to improve the air-conditioning efficiency by optimizing the mixing ratio of the refrigerant flowing into the distributor during operation during the cooling discharge chamber and the cooling main body.

1 is a block diagram showing a cooling and heating simultaneous multi-air conditioner according to the present invention.

Figure 2a is an operation diagram showing the operating state of Figure 1 during the cooling chamber operation.

Figure 2b is an operation diagram showing the operating state of Figure 1 during the heating room operation.

Figure 3a is an operation diagram showing the operating state of Figure 1 during the cooling main body simultaneous operation.

Figure 3b is an operation diagram showing the operating state of Figure 1 during heating subject simultaneous operation.

Figure 4 is a block diagram showing another embodiment of the air-conditioning simultaneous multi-air conditioner according to the present invention.

Explanation of symbols for main parts of the drawings

A: outdoor unit 1: compressor

2: outdoor heat exchanger 2a: outdoor fan

3: discharge tube 3a: first anisotropic

4: auxiliary tube 4a: third anisotropic

5: suction pipe 5a: second anisotropic

11: first bypass tube 11a: fourth anisotropic

12: second bypass tube 12a: fifth anisotropic side

13: 3rd bypass tube 13a: 6th anisotropic

14: check valve 15: parallel tube

15a: Electronic expansion valve for heating 16: Temperature sensor

B: distributor 20: guide pipe

21: vapor phase refrigerant pipe 22a, 22b, 22c: vapor phase refrigerant branch pipe

23: liquid refrigerant tube 24a, 24b, 24c: liquid refrigerant branch tube

25a, 25b, 25c: Regression Branch Pipe 26: Regression Pipe

27: bypass tube for heating 30: valve part

31: anisotropic valve 32: heating valve

40: gas-liquid separator C: indoor unit

61a, 61b, 61c: electromagnetic expansion valves 62a, 62b, 62c: indoor heat exchanger

In order to achieve the above object, the present invention, the outdoor unit is installed in the outdoor and having a compressor, an outdoor heat exchanger and an outdoor fan for blowing air to the outdoor heat exchanger, each installed in each room of the room and the internal expansion valve and A plurality of indoor units each having an indoor heat exchanger, provided between the outdoor unit and the indoor unit, and separating the refrigerant introduced from the outdoor unit from the gas-liquid separator in accordance with the operating conditions of the cooling and discharging chamber, the heating and discharging chamber, the cooling main body and the heating main body simultaneously. Provided is a heating and cooling simultaneous multi-air conditioner including a distributor for selectively guiding the indoor units.

In addition, the air-conditioning simultaneous multi-air conditioner according to the present invention is provided on the inside / outside of the outdoor unit, and connected to the suction unit of the distributor and the compressor, the discharge unit of the compressor and the outdoor heat exchanger and the gas-liquid separator A connecting piping unit for selectively guiding the refrigerant according to the operating condition by connecting the gas and the gas-liquid separator side pipe of the connection pipe unit to a high pressure section through which the refrigerant flows in a high pressure state, and the piping at the suction side of the compressor is in a low pressure state. The mixing ratio of the gaseous refrigerant and the liquid refrigerant flowing into the gas-liquid separator of the distributor through the outdoor heat exchanger and the bypass unit for bypassing the refrigerant during operation of the heating chamber and the heating main body simultaneously so as to be specified as the low pressure section through which the refrigerant flows. The rotation speed of the outdoor fan is controlled to be adjusted according to the operating conditions when all rooms and cooling main body Control means for controlling is included.

Here, the control means, the temperature sensor for detecting the temperature of the refrigerant is provided on the rear end side pipe of the outdoor heat exchanger based on the flow of the refrigerant during operation of the cooling and discharge chamber and the cooling main body, and the detected refrigerant temperature and A microcomputer is included to detect the refrigerant mixture ratio on the pipe by comparing the predetermined refrigerant temperature, and to control the rotation speed of the outdoor fan so that the detected mixture ratio is equal to the predetermined mixing ratio required for the operation of the cooling chamber and the cooling main body simultaneously. desirable.

According to another aspect, the present invention, the step of detecting the temperature of the refrigerant using the temperature sensor during the operation of the cooling chamber and the cooling main body, and comparing the detected refrigerant temperature and the predetermined refrigerant temperature on the pipe Detecting a refrigerant mixing ratio, and varying the number of revolutions of the outdoor fan such that the detected mixing ratio is equal to the established mixing ratio required for the operation of the cooling room and the cooling main body simultaneously. Provides a control method.

Therefore, according to the present invention, according to the environment of each room, the heating room operation for heating each room as a whole, the heating subject simultaneous operation for cooling a part of each room at the same time, and the cooling room operation for each room cooling Simultaneous operation of the cooling main body, which simultaneously heats a part of the entire room, becomes possible. In addition, the two pipes of the outdoor unit connected to the distributor are defined as a high pressure section flowing only a high pressure refrigerant and a low pressure section flowing only a low pressure refrigerant irrespective of operating conditions, thereby improving air-conditioning efficiency such as reducing specific volume change of the refrigerant in the pipe. It becomes possible. In addition, since the mixing ratio of the refrigerant flowing into the gas-liquid separator during operation during the cooling discharge chamber and the cooling main body is optimized, the air conditioning efficiency can be improved.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 is a block diagram showing a simultaneous heating and cooling multi-air conditioner according to the present invention, Figure 2a is an operation diagram showing the operating state of Figure 1 during the operation of the cooling and discharge chamber, Figure 2b is an operating state of Figure 1 during the heating room operation The operation diagram shown.

3A is an operation diagram showing an operation state of FIG. 1 when the cooling main body simultaneous operation is performed, and FIG. 3B is an operation diagram showing an operation state of FIG.

In addition, Figure 4 is a block diagram showing another embodiment of the air-conditioning simultaneous multi-air conditioner according to the present invention.

In addition, for convenience of description, reference numeral 22 to be described later indicates "22a, 22b, 22c", 24 indicates "24a, 24b, 24c", 25 indicates "25a, 25b, 25c", and 61 indicates "61a". , 61b, 61c ”, and 62 refers to“ 62a, 62b, 62c ”. However, it will be obvious that the number of reference numerals in parentheses may vary depending on the number of indoor units.

As shown in FIG. 1, the air-conditioning simultaneous multi-air conditioner according to the present invention includes an outdoor unit A, a distributor B, and a plurality of indoor units C. The outdoor unit A includes a compressor 1. ), An outdoor heat exchanger (2) and an outdoor fan (2a), and the like, and the distributor (B) includes a guide pipe portion (20), a valve portion (30) and a gas-liquid separator (40). In (C), the indoor heat exchanger 62, the electromagnetic expansion valve 61, and the like are internally formed.

Hereinafter, specific examples of the outdoor unit A, the distributor B, and the plurality of indoor units C will be described in order.

First, the outdoor unit (A) has the following components.

Prior to the description of the composition, the specific volume of the high pressure refrigerant and the low pressure refrigerant is different from each other in order to improve the air conditioning efficiency, the high pressure flowing only the high-pressure refrigerant through the two pipes of the outdoor unit (A) connected to the distributor (B) regardless of the operating conditions Preferably, the piping structure is designed to be specified as the section HP and the low pressure section LP through which only the low pressure refrigerant flows.

In addition, in order to further improve the air conditioning efficiency, it is preferable that the design is made to control the mixing ratio of the refrigerant to optimize the mixing ratio of the refrigerant flowing into the gas-liquid separator 40 during the operation of the cooling chamber and the cooling main body simultaneously.

That is, based on the above description, the outdoor unit (A), as shown in Figure 1, the compressor 1, the outdoor heat exchanger (2), and the outdoor fan (2a) for blowing air to the outdoor heat exchanger And the inlet of the distributor (B) and the compressor (1), and the outlet of the compressor (1), the outdoor heat exchanger (2) and the gas-liquid separator (40) in accordance with the operating conditions. The connection piping unit for selectively guiding the refrigerant, and the pipe of the gas-liquid separator 40 side of the connection piping unit to be specified by the high pressure section (HP) flowing the refrigerant in a high pressure state and the inlet pipe of the compressor (1) Mixing ratio of the bypass unit flowing into the gas-liquid separator 40 and the bypass unit for bypassing the refrigerant during operation of the heating chamber and the heating main body so that the refrigerant in the low pressure state flows through the low pressure section LP, respectively, In operating condition of cooling room and cooling main body Control means for controlling the rotational speed of the outdoor fan (2a) to be adjusted accordingly.

Here, the connection pipe unit, the discharge pipe 3 for connecting the discharge portion of the compressor 1 and the outdoor heat exchanger 2, the outdoor heat exchanger 2 and the gas-liquid separator 40 is connected It is preferably made of an auxiliary pipe (4), and the suction pipe (5) connecting the suction unit of the distributor (B) and the compressor (1).

The bypass unit includes a first bypass pipe 11 connecting the discharge pipe 3 and the auxiliary pipe 4, and a rear end side of the discharge pipe 3 (the outdoor heat exchanger 2). ) And a second bypass pipe 12 connecting the suction part of the compressor 1 with the pipe between the first bypass pipe 11 and the front end of the suction pipe 5 and the auxiliary pipe 4. It is preferably made of a third bypass pipe 13 connecting the side (piping between the outdoor heat exchanger 2 and the first bypass pipe 11).

In addition, the high pressure section (HP) is located between the first bypass pipe (11) and the gas-liquid separator (40) of the auxiliary pipe (4) as a section that always maintains a high pressure state regardless of the operating conditions, The low pressure section LP is a section which always maintains a low pressure state regardless of an operating condition, and is preferably located between the distributor B of the suction pipe 5 and the third bypass pipe 13.

In addition, the connection pipe unit and the bypass unit is provided with one valve group including a plurality of valves.

Here, the valve group, in one embodiment, may be made of an anisotropy is less expensive than four or three sides, in another embodiment, a combination of three and two sides to reduce the number of valves It may be.

First, as an embodiment, the valve group consisting of only the anisotropic valve, as shown in Figure 1, the first bypass pipe 11 and the second bypass pipe 12 of the discharge pipe (3) ) Between the first anisotropy 3a provided between the second anisotropy 5a provided between the third bypass pipe 13 and the suction part of the compressor 1 of the suction pipe 5; In the auxiliary pipe (4), the third anisotropic side (4a) provided between the first bypass pipe 11 and the third bypass pipe 13, and the first bypass pipe (11) 4th anisotropic edge 11a provided, the 5th anisotropic edge 12a provided in the said 2nd bypass pipe 12, and the 6th anisotropic edge 13a provided in the said 3rd bypass pipe 13; ) Will be included.

And, as another embodiment, the valve group formed by combining the three sides and the anisotropy, as shown in Figure 4, is provided at the point where the discharge pipe 3 and the first bypass pipe 11 intersects. The first three-sided 17a, the second three-sided 17b provided at the point where the suction pipe 5 and the third bypass pipe 13 intersect, and the first of the auxiliary pipe (4) The first anisotropic side 17c provided between the bypass tube 11 and the said 3rd bypass tube 13, and the 2nd anisotropic side 17d provided in the said 2nd bypass tube 12 are included. Will be done.

In addition, during the simultaneous operation of the cooling chamber and the cooling main body, the refrigerant discharged from the outdoor heat exchanger (2) is introduced into the gas-liquid separator (40) along the auxiliary pipe (4). More preferably, the refrigerant flowing into the outdoor heat exchanger 2 is expanded and introduced.

To this end, it is provided between the outdoor heat exchanger (2) and the third bypass pipe (13) of the auxiliary pipe (4) to block the flow of refrigerant during operation at the same time the heating chamber and heating main body, and the cooling chamber and cooling main body A check valve 14 for allowing refrigerant to pass through at the same time, and a parallel pipe 15 provided in parallel with the auxiliary pipe 4 at the boundary of the check valve to guide the refrigerant during the heating and heating main body at the same time; It is provided in the parallel pipe further comprises a heating electromagnetic expansion valve (15a) for expanding the refrigerant flowing into the outdoor heat exchanger (2) during the heating chamber and heating main body simultaneously operation.

The control means includes a temperature sensor 16 provided in the auxiliary pipe 4 to detect a temperature of the refrigerant during operation of the cooling discharge chamber and the cooling main body, and comparing the detected refrigerant temperature with a predetermined refrigerant temperature. It is preferable that a microcomputer is included to detect the refrigerant mixing ratio on the pipe and to control the rotation speed of the outdoor fan 2a such that the detected mixing ratio is equal to a predetermined mixing ratio required for the operation of the cooling discharge chamber and the cooling main body simultaneously.

On the other hand, the outdoor unit (A) made as described above is to perform the following operation according to the operating conditions. In addition, the operation of the outdoor unit described later is one embodiment of the valve group is applied.

First, as shown in FIGS. 2A and 3A, in the cooling chamber operation or the simultaneous operation of the cooling main body, the refrigerant in the gaseous phase discharged from the compressor 1 flows along the discharge pipe 3 and is opened. The refrigerant flowing through the side (3a) to the outdoor heat exchanger (2), and then the heat exchanged from the outdoor heat exchanger (2) flows along the auxiliary pipe (4) while the check valve 14 and the open third anisotropic valve It is introduced into the gas-liquid separator 40 via 14a.

At this time, the mixing ratio of the refrigerant flowing into the gas-liquid separator 40 along the auxiliary pipe 4 is optimized by the control means. That is, by measuring the temperature of the refrigerant flowing along the pipe by the temperature sensor 16 provided in the auxiliary pipe (4), by comparing the measured refrigerant temperature and the predetermined refrigerant temperature to detect the refrigerant mixture ratio on the pipe, The rotation speed of the outdoor fan 2a is controlled so that the detected mixing ratio is equal to the predetermined mixing ratio required for the cooling main body simultaneous operation, thereby optimizing the mixing ratio of the refrigerant.

In particular, during the operation of the cooling and discharging chamber, by controlling the rotation speed of the outdoor fan (2a) to condense all the refrigerant introduced into the outdoor heat exchanger (2) to specify the refrigerant flowing into the gas-liquid separator 40 in the liquid state. .

The process will be described later in the description of the overall operation of the air-conditioning simultaneous multi-air conditioner.

As shown in FIGS. 2B and 3B, the refrigerant in the gas phase discharged from the compressor 1 flows along the discharge tube 3 during the heating chamber operation or the heating main body simultaneous operation. 3a) flows into the first bypass pipe 11 at a high pressure without passing through the outdoor heat exchanger 2 and passes through the open fourth anisotropy 11a to enter the auxiliary pipe 4. do. Then, the gaseous refrigerant on the auxiliary pipe is introduced into the gas-liquid separator 40 by the blocking of the third anisotropy 4a provided in the auxiliary pipe 4. The process will be described later in the description of the overall operation of the air-conditioning simultaneous multi-air conditioner.

In addition, the operation of the outdoor unit A to which another embodiment of the valve group is applied will also be separately described in the overall operation description of the air-conditioning simultaneous multi-air conditioner described later.

Secondly, the distributor B has the following components.

Prior to the description of the configuration, the refrigerant flowing from the outdoor unit (A) according to the operating conditions must be accurately guided to the selected indoor unit (C), and the refrigerant heat exchanged in the indoor unit must be accurately guided to the outdoor unit. Accordingly, in view of this, it is preferable that the distributor is designed.

That is, based on the above description, the distributor (B), the gas-liquid separator 40 for separating the refrigerant flowing from the outdoor unit (A) according to the phase, and the refrigerant separated from the gas-liquid separator along the phase The guide pipe 20 for guiding each indoor unit (C) and re-guiding the refrigerant exchanged in the indoor unit to the distributor, and the refrigerant so that only the indoor unit selected according to the operating conditions of the plurality of indoor units (C) flows into the indoor unit (C). Preferably, the valve portion for controlling the guide pipe portion 30 is included.

Here, the guide pipe portion 20, the gas phase refrigerant pipe 21 for guiding the gas phase refrigerant separated in the gas-liquid separator 40, the gas phase branched from the gas phase refrigerant pipe connected to each indoor unit (C), respectively The refrigerant branch pipe 22, the liquid refrigerant pipe 23 for guiding the liquid refrigerant separated from the gas-liquid separator 40, and the liquid refrigerant powder branched from the liquid refrigerant pipe and connected to the respective indoor units C, respectively. A branch pipe 24, a revolving branch pipe 25 branched from each of the gaseous phase refrigerant branch pipes 22 and returning the refrigerant exchanged in the indoor unit selected according to the operating conditions, and the revolving branch pipe are laminated together into the outdoor unit ( A return pipe (26) for guiding the coolant to the suction pipe (5) of A) and a lower portion of the gas-liquid separator (40) and the return pipe (26) to connect the coolant to the return pipe during operation during heating and discharge chambers. The guide includes a bypass tube for heating (27). It is right.

The valve unit 30 is provided in each of the gas phase refrigerant branch pipes 22, the liquid refrigerant branch pipes 24, and the regression branch pipes 25, respectively, and is selectively turned on depending on operating conditions. It is preferable that the heating valve 32 is turned on / off and the heating valve 32 is provided in the heating bypass pipe 27 and opened during operation at the same time as the heating chamber and the heating main body.

On the other hand, the operation of the dispenser (B) made as described above will be mentioned together in the overall operation description to be described later.

Third, each indoor unit (C) has the following components.

Each indoor unit includes an indoor heat exchanger 62 and an electromagnetic expansion valve 61 that extend between the gaseous phase refrigerant branch pipe 22 and the liquid refrigerant branch pipe 24, and an indoor fan that blows air into the indoor heat exchanger ( Not shown).

2A to 3B, the operation of the air-conditioning simultaneous multi-air conditioner according to the present invention made as described above and the flow of refrigerant according to the present invention will be described.

Prior to the operation description, in the description of the simultaneous operation of the cooling main body and the simultaneous operation of the heating main body, for convenience, the number of indoor units C is assumed to be 3 units (C1, C2, C3). ) Assumes cooling and the remaining one indoor unit (C3) performs heating, while the two indoor units (C1, C2) perform heating while the other main unit (C3) performs heating during simultaneous operation of the heating main body. .

First, as shown in FIG. 2A, during operation of the cooling and discharging chamber, the gaseous refrigerant discharged from the compressor 1 flows along the discharge tube 3 and passes through the first anisotropic side 3a that is opened. It is introduced into the group (2). At this time, the refrigerant introduced into the outdoor heat exchanger (2) is supercooled by the blowing of the outdoor fan (2a) which is optimally driven by the control means, and then continues to flow along the auxiliary pipe (4) to the check valve (14) Through the three anisotropy (4a) in order to be introduced into the gas-liquid separator (40). Here, since the detailed description of the control means has been described above, it will be omitted.

In addition, the high pressure / liquid refrigerant introduced into the gas-liquid separator 40 is introduced into the liquid refrigerant pipe 23 and branched into the liquid refrigerant branch pipe 24, respectively, and then expands through each of the electromagnetic expansion valves 61. And it is evaporated while passing through each indoor heat exchanger (62) to cool each room.

Thereafter, the evaporated refrigerant moves along each gas phase refrigerant branch pipe 22, and is collected in the return pipe 26 through the return branch pipe 25 by blocking the anisotropic valves 31a, 31b, and 31c. 5) will flow into. The refrigerant introduced into the suction pipe 5 is sucked into the compressor 1 through the open second anisotropy 5a and the accumulator 19 sequentially.

Secondly, as shown in FIG. 2B, during the heating chamber operation, the refrigerant in the gas phase discharged from the compressor 1 flows along the discharge pipe 3 and is blocked by the first anisotropic side 3a. After passing through the first bypass pipe 11 in a high pressure state without passing through (2), it passes through the open fourth anisotropy 11a and enters the auxiliary pipe 4. Thereafter, the refrigerant in the gas phase introduced into the auxiliary pipe 4 is continuously introduced into the gas-liquid separator 40 along the auxiliary pipe 4 by the blocking of the third anisotropy 4a.

Then, the high pressure / gas state refrigerant introduced into the gas-liquid separator 40 is introduced into the gas phase refrigerant pipe 21 and branched into the gas phase refrigerant branch pipe 22, and then passes through each indoor heat exchanger 62, respectively. It will condense with heating the room.

Thereafter, the condensed refrigerant flows back into the gas-liquid separator 40 while sequentially passing through each of the open electronic expansion valves 61, the liquid refrigerant branch pipe 24, and the liquid refrigerant pipe 23. In addition, the refrigerant introduced into the gas-liquid separator 40 is introduced into the return pipe 26 through the heating valve 32 opened after being introduced into the heating bypass pipe 27.

In addition, the refrigerant flowing into the return pipe 26 flows along the suction pipe 5, and then flows into the third bypass pipe 13 by blocking the second anisotropy 5a, and then opens the sixth anisotropic valve 13a. It is introduced into the auxiliary pipe (4) through. The refrigerant introduced into the auxiliary pipe 4 flows into the parallel pipe 15 by blocking the third anisotropic valve 4a and the check valve 14 which are already blocked, and is then provided on the parallel pipe 15. It is expanded in the heating electromagnetic expansion valve (15a) to be introduced into the outdoor heat exchanger (2).

Thereafter, the low-pressure gaseous refrigerant evaporated from the outdoor heat exchanger 2 passes through the fifth anisotropic valve 12a opened while sequentially passing through one side of the discharge pipe 3 and the second bypass pipe 12. After passing through, it passes through the accumulator 19 along the second bypass pipe 12 and is sucked into the compressor 1.

Third, as shown in FIG. 3A, during the simultaneous operation of the cooling main body, the refrigerant in the gaseous phase discharged from the compressor 1 flows along the discharge tube 3 and passes through the first anisotropic side 3a that is opened. It is introduced into the heat exchanger (2). At this time, the refrigerant introduced into the outdoor heat exchanger (2) becomes the optimum abnormal state by the blowing of the outdoor fan (2a) that is optimally driven by the control means, and then continues along the auxiliary pipe (4), the check valve 14 () and After passing through the open third anisotropy (4a) sequentially it is introduced into the gas-liquid separator (40).

At this time, the mixing ratio of the refrigerant collected in the gas-liquid separator 40 is equal to the refrigerant mixing ratio preset by the above-described control means. Here, as described above, the predetermined refrigerant mixing ratio is determined according to the two cooling indoor units C1 and C2 requiring the liquid refrigerant and one heating indoor unit C3 requiring the refrigerant in the gas phase. It is an experimental value determined by an experiment according to various load conditions such as being determined according to the flow rate of the condensed refrigerant flowing into one cooling indoor unit (C3) and two cooling indoor units (C1, C2).

Among the refrigerants in the high pressure / ideal state (the state in which the gas and the liquid are mixed and the same as the preset mixing ratio) collected in the gas-liquid separator 40, first, the liquid refrigerant separated in the gas-liquid separator 40 is a liquid refrigerant tube. (23) flows into the selected first and second liquid refrigerant branch pipes (24a, 24b) and then expands through the first and second electromagnetic expansion valves (61a, 61b), respectively, and the first and second room heat exchanges, respectively. The air is evaporated through the groups 62a and 62b to cool each room.

At the same time, the gaseous phase refrigerant separated from the gas-liquid separator 40 flows into the gaseous phase refrigerant tube 21 and into the selected third gaseous phase refrigerant branch tube 22c and then passes through the third indoor heat exchanger 62c. After heating the room requiring heating, the above-mentioned third liquid expansion valve 61c and the third liquid refrigerant branch pipe 24c are joined to the liquid refrigerant pipe 23 described above. Eventually branched into the first and second liquid refrigerant branch pipes (24a, 24b) selected together with the above-described liquid refrigerant, and then expanded while passing through the first and second electromagnetic expansion valves (61a, 61b), respectively, While evaporating through the heat exchangers 62a and 62b, the respective rooms are cooled.

Here, the reason that the liquid refrigerant flows only into the selected first and second liquid refrigerant branch pipes 24a and 24b is because of the pressure difference between the refrigerants, and specifically, the pressure of the refrigerant flowing out of the third liquid refrigerant branch pipe 24c. This is because the pressure of the refrigerant flowing into the first and second liquid refrigerant branch pipes 24a and 24b becomes larger.

Thereafter, the evaporated refrigerant moves along the first and second gaseous refrigerant branch pipes 22a and 22b, respectively, and the first and second return branch pipes 25a, respectively, are blocked by blocking the first and second anisotropic valves 31a and 31b. 25b) is introduced into the return pipe (26).

In addition, the low pressure / gas phase refrigerant flowing into the return pipe 26 flows along the suction pipe 5 and sequentially passes through the second anisotropy 5a and the accumulator 19 that are opened. Will be inhaled.

Fourth, as shown in Figure 3b, during the simultaneous operation of the heating main, the gaseous refrigerant discharged from the compressor (1) flows along the discharge pipe (3), the outdoor heat exchanger by blocking the first anisotropic side (3a) After passing through the first bypass pipe 11 in a high pressure state without passing through (2), it passes through the open fourth anisotropy 11a and enters the auxiliary pipe 4. Thereafter, the refrigerant in the gas phase introduced into the auxiliary pipe 4 is continuously introduced into the gas-liquid separator 40 along the auxiliary pipe 4 by the blocking of the third anisotropy 4a.

In addition, the high pressure / gas state refrigerant introduced into the gas-liquid separator 40 is introduced into the gas phase refrigerant pipe 21 and branched into the first and second gas phase refrigerant branch pipes 22a and 22b, and then the first and second indoor heat exchange. The respective rooms are heated while passing through the groups 62a and 62b, and condensed.

Thereafter, the condensed refrigerant passes through the first and second electromagnetic expansion valves 61a and 61b, the first and second liquid refrigerant branch tubes 24a and 24b, and the liquid refrigerant tube 23, respectively. A portion of the condensed refrigerant is introduced back to the gas-liquid separator 40 along the liquid refrigerant pipe 23, and the remaining portion of the condensed refrigerant is introduced into the selected third liquid refrigerant branch pipe 24c.

That is, a part of the condensed refrigerant is introduced into the return pipe 26 through the heating valve 32 after being introduced into the heating bypass pipe 27 through the gas-liquid separator 40. In addition, the refrigerant flowing into the return pipe 26 flows along the suction pipe 5, and then flows into the third bypass pipe 13 through the blocking of the second anisotropy 5a to open the sixth anisotropic valve ( It is introduced into the auxiliary pipe (4) through 13a). The refrigerant introduced into the auxiliary pipe 4 flows into the parallel pipe 15 by blocking the third anisotropic valve 4a and the check valve 14 which are already blocked, and is then provided on the parallel pipe 15. It is expanded in the heating electromagnetic expansion valve (15a) to be introduced into the outdoor heat exchanger (2). Thereafter, the low-pressure gaseous refrigerant evaporated from the outdoor heat exchanger 2 passes through the fifth anisotropic valve 12a opened while sequentially passing through one side of the discharge pipe 3 and the second bypass pipe 12. After passing through, it passes through the accumulator 19 along the second bypass pipe 12 and is sucked into the compressor 1.

At the same time, the remaining part of the condensed refrigerant flows into the selected third liquid refrigerant branch pipe (24c), expands through the third electromagnetic expansion valve (61c), and evaporates through the third indoor heat exchanger (62c). The air conditioner is then cooled. Thereafter, the evaporated refrigerant flows along the third gas phase refrigerant branch pipe (22c), flows into the third return branch pipe (25c) by blocking the third anisotropic valve (31c), and then enters the aforementioned return pipe (26). To join. Since the process is described above it will be omitted.

Here, the reason why the condensed refrigerant flows into the third liquid refrigerant branch pipe 24c that requires cooling without flowing into the liquid refrigerant branch pipe 24a or 24b that requires heating is because of a pressure difference. This is because the pressure of the first and second liquid refrigerant branch pipes 24a and 24c that are required is greater than the pressure of the third liquid refrigerant branch pipe 24c that requires cooling.

On the other hand, when the valve group of the other embodiment of the valve group forming the outdoor unit is applied to describe the operation of the air-conditioning simultaneous multi-air conditioner as follows.

Prior to the description, since the flow of the refrigerant is the same as the case in which the above-described barb group is applied, the description will be omitted with reference to FIG. 4 only for the valve group of another embodiment.

First, during the simultaneous operation of the cooling chamber and the cooling main body, the first three-side valve 17a is switched so that the refrigerant discharged from the compressor 1 flows only along the discharge pipe 3 to the outdoor heat exchanger 2. Then, the second three-way side 17b is switched so that the refrigerant flowing from the distributor B is sucked into the compressor 1 only. At the same time, the first anisotropic edge 17c is opened and the second anisotropic edge 17d is closed.

Secondly, when the heating chamber and the heating main body are operated at the same time, the first three-way side 17a is switched so that the refrigerant discharged from the compressor 1 flows only to the first bypass pipe 2. In addition, the second trilateral valve 17b is switched such that the refrigerant flowing from the distributor B flows only into the third bypass pipe 13. At the same time, the first anisotropic edge 17c is closed and the second anisotropic edge 17d is opened.

On the other hand, as already mentioned in the above-described operation of the outdoor unit, the control method of the air-conditioning simultaneous multi-air conditioner according to another aspect of the present invention, the temperature sensor 16 during the operation of the cooling chamber and the cooling main body at the same time Detecting the temperature of the refrigerant using the refrigerant; comparing the detected refrigerant temperature with a preset refrigerant temperature to detect a refrigerant mixture ratio on the pipe; The step of varying the number of revolutions of the outdoor fan (2a) to be equal to the mixing ratio is made.

Therefore, by providing the air-conditioning simultaneous multi-air conditioner according to the present invention, it is possible to optimally respond to the environment of each room. In other words, the heating room operation for heating the whole room and the heating main body simultaneous operation for cooling part of the whole room at the same time, the cooling room operation for cooling the entire room at the same time and the cooling main body simultaneous operation for heating some of the whole room at the same time This becomes possible. In addition, the two pipes of the outdoor unit connected to the distributor are classified into a high pressure section flowing only a high pressure refrigerant and a low pressure section flowing only a low pressure refrigerant regardless of operating conditions, thereby improving air-conditioning efficiency such as reducing specific volume change of the refrigerant in the pipe. It becomes possible. In addition, since the mixing ratio of the refrigerant flowing into the gas-liquid separator during operation during the cooling discharge chamber and the cooling main body is optimized, the air conditioning efficiency can be improved.

So far, the present invention has been described with reference to the preferred embodiments, and those skilled in the art to which the present invention pertains to the detailed description of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

As described above, the present invention, by providing a heating and cooling simultaneous multi-air conditioner and its operation method, has the following advantages.

First, according to the present invention, there is an advantage that the optimum response to the environment of each room. In other words, the heating room operation for heating the whole room and the heating main body simultaneous operation for cooling part of the whole room at the same time, the cooling room operation for cooling the entire room at the same time and the cooling main body simultaneous operation for heating some of the whole room at the same time There is a possible advantage to this

Second, according to the present invention, as the two pipes of the outdoor unit connected to the distributor is specified as a high pressure section flowing only a high pressure refrigerant and a low pressure section flowing only a low pressure refrigerant irrespective of operating conditions, it is possible to reduce the specific volume change of the refrigerant in the pipe. There is an advantage that the air conditioning efficiency is improved.

Third, according to the present invention, there is an advantage that the air-conditioning efficiency is improved according to the optimization dome of the mixing ratio of the refrigerant flowing into the gas-liquid separator during the operation of the cooling chamber and the cooling main body simultaneously.

Fourth, in the configuration of the distributor by taking a structure in which a less expensive two-way valve is used instead of a three-way or four-way valve, there is an advantage that the product cost is reduced.

Claims (12)

An outdoor unit installed outdoors and having an compressor, an outdoor heat exchanger, and an outdoor fan for blowing air to the outdoor heat exchanger; A plurality of indoor units each installed in each room in the room, each having an electronic expansion valve and an indoor heat exchanger; A distributor provided between the outdoor unit and the indoor unit and separating the refrigerant introduced from the outdoor unit from a gas-liquid separator to selectively guide the plurality of indoor units according to operating conditions at the same time as the cooling / discharge chamber, the heating / discharging chamber, the cooling main body, and the heating main body simultaneously; Connection pipes provided inside / outside the outdoor unit to connect the discharge unit of the compressor and the suction unit of the compressor and to selectively guide the refrigerant according to the operating conditions by connecting the discharge unit of the compressor, the outdoor heat exchanger, and the gas-liquid separator. Unit, The gas-liquid separator side of the connecting piping unit is characterized in that the high-pressure section flowing through the refrigerant in the high pressure state, the suction side pipe of the compressor is operated at the same time the heating chamber and heating main body so as to be specified as a low-pressure section through which the low-pressure refrigerant flows. Bypass unit for bypassing the refrigerant when And controlling means for controlling the rotation speed of the outdoor fan so that the mixing ratio of the gaseous refrigerant and the liquid refrigerant flowing into the gas-liquid separator of the distributor through the outdoor heat exchanger is adjusted according to the operating conditions at the same time as the cooling chamber and the cooling main body. Heating and cooling simultaneous multi air conditioner. The method of claim 1, The connection piping unit is; A discharge pipe connecting the discharge part of the compressor and the outdoor heat exchanger; An auxiliary pipe connecting the outdoor heat exchanger and the gas-liquid separator; Cooling and heating simultaneous multi-air conditioner, characterized in that comprises a suction pipe connecting the distributor and the suction of the compressor. The method of claim 2, The bypass unit is; A first bypass pipe connecting the discharge pipe and the auxiliary pipe; A second bypass pipe connecting a rear end side of the discharge pipe (pipe between the outdoor heat exchanger and the first bypass pipe) and the suction part of the compressor; And a third bypass pipe for connecting the suction pipe and the front end side of the auxiliary pipe (pipe between the outdoor heat exchanger and the first bypass pipe). The method of claim 3, wherein The high pressure section is a section that maintains a high pressure at all times irrespective of operating conditions, and is located between the first bypass pipe and the gas-liquid separator among the auxiliary pipes. The low pressure section is a section for maintaining a low pressure at all times regardless of the operating conditions, the air-conditioning simultaneous multi-air conditioner, characterized in that located between the distributor of the suction pipe and the third bypass pipe. The method of claim 3, wherein A first anisotropic side provided between the first bypass pipe and the second bypass pipe among the discharge pipes; A second anisotropy provided between the third bypass pipe and the suction part of the compressor among the suction pipes; A third anisotropy provided between the first bypass pipe and the third bypass pipe among the auxiliary pipes; A fourth anisotropic side provided in the first bypass pipe, A fifth anisotropy provided in the second bypass pipe, Cooling and heating simultaneous multi-air conditioner, characterized in that further comprises a sixth anisotropy provided in the third bypass pipe. The method of claim 3, wherein A first triangular side provided at a point where the discharge tube and the first bypass tube cross each other; A second triangular valve provided at a point where the suction pipe and the third bypass pipe cross each other; A first anisotropic side provided between the first bypass pipe and the third bypass pipe among the auxiliary pipes; Cooling and heating simultaneous multi-air conditioner, characterized in that further comprises a second anisotropy provided in the second bypass pipe. The method according to claim 5 or 6, A check valve provided between the outdoor heat exchanger and the third bypass pipe among the auxiliary pipes to block the flow of the refrigerant during the operation of the heating chamber and the heating main body and to pass the refrigerant during the operation of the cooling chamber and the cooling main body; A parallel pipe provided in parallel to the auxiliary pipe at the boundary of the check valve and guiding the refrigerant during operation at the same time as the heating chamber and the heating main body; And a heating electromagnetic expansion valve provided in the parallel pipe to expand the refrigerant flowing into the outdoor heat exchanger during the heating chamber and the heating main body at the same time. The method according to claim 1 or 2, The distributor, A guide pipe unit for guiding the refrigerant separated from the gas-liquid separator to each indoor unit along with the phase and re-guiding the refrigerant exchanged in the indoor unit to the distributor; Cooling and heating simultaneous multi-air conditioner, characterized in that comprises a valve unit for controlling the guide pipe so that the refrigerant flows only in the indoor unit selected according to the operating conditions of the plurality of indoor units. The method of claim 8, The guide pipe portion; A gas phase refrigerant pipe guiding the gas phase refrigerant separated from the gas-liquid separator, A gas phase refrigerant branch pipe branched from the gas phase refrigerant pipe and connected to each indoor unit, A liquid refrigerant pipe for guiding the liquid refrigerant separated from the gas-liquid separator; A liquid refrigerant branch pipe branched from the liquid refrigerant pipe and connected to each indoor unit, A return branch pipe branched from each of the gas phase refrigerant branch pipes to return the refrigerant exchanged in the indoor unit selected according to the operating conditions; A return pipe for laminating the return branch pipes to one to guide the refrigerant to the suction pipes of the outdoor unit; And a heating bypass tube for connecting the lower part of the gas-liquid separator and the return pipe to guide the refrigerant to the return pipe when the heating chamber and the heating main body are operated at the same time. The method of claim 8, The valve unit; An anisotropic valve provided between each of the gas phase refrigerant branch pipes, each of the liquid refrigerant branch pipes, and each of the regression branches, and selectively on / off depending on operating conditions; A heating and cooling simultaneous multi-air conditioner, characterized in that the heating valve is provided in the heating chamber, the heating main body is opened during operation at the same time. The method of claim 2, The control means; A temperature sensor provided in the auxiliary pipe and detecting a temperature of the refrigerant during operation of the cooling chamber and the cooling main body; Comparing the detected refrigerant temperature with a predetermined refrigerant temperature to detect a refrigerant mixing ratio on a pipe, and controlling the rotation speed of the outdoor fan so that the detected mixing ratio is equal to a predetermined mixing ratio required for the operation of a cooling room and a cooling main body simultaneously. Heating and cooling simultaneous multi air conditioner, characterized in that the microcomputer is included. Sensing the temperature of the refrigerant by using the temperature sensor when the cooling chamber and the cooling main body are operated at the same time; Detecting the refrigerant mixing ratio on the pipe by comparing the detected refrigerant temperature with a preset refrigerant temperature; And controlling the number of rotations of the outdoor fan so that the detected mixing ratio is equal to the established mixing ratio required for the operation of the cooling and discharging chamber and the cooling main body simultaneously. How to.