KR20040064459A - Multi-type air conditioner for cooling/heating the same time - Google Patents

Abstract

PURPOSE: A condensed water removing device for a multi-type air conditioner system for simultaneously heating/cooling is provided to remove the condensed water generated in the ways of a four way valve in the case of heating subject simultaneous operation or all room heating operation, thereby making the operation of the four way valve smooth when changing the subject of operation to cooling operation. CONSTITUTION: A condensed water removing device for a multi-type air conditioner system for simultaneously heating/cooling includes a condensed water removing unit(70) provided to a four-way valve(6a) for removing condensed water generated by the condensation of gas phase refrigerant of high pressure between the ways of the four-way valve, wherein one of the ways introduces gas phase refrigerant of low pressure and the other one blocks the gas phase refrigerant of high pressure. The condensed water removing unit is a heater provided to a closed tube(6c) of the four-way valve for evaporating and removing liquid phase refrigerant generated in the closed tube and the way blocking the gas phase refrigerant of high pressure.

Description

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

The present invention relates to a simultaneous air-conditioning multi-air conditioner, and more particularly, to a condensate removal device for an air-conditioning-type multi-air conditioner that removes condensate generated by heat exchange between refrigerants flowing in four-way valves at the same time during heating and heating. It is about.

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 demand for the development of a simultaneous air-conditioning multi-air conditioner to operate a cooling mode.

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

It is another object of the present invention to provide a condensate removal apparatus for an air-conditioning simultaneous multi-air conditioner that removes condensate generated by heat exchange between refrigerants flowing through four-way valves at the same time during heating or heating.

1 is a circuit diagram schematically showing a cooling and heating simultaneous multi-air conditioner with a condensate removal device according to the present invention.

Figure 2a is an operation diagram showing the refrigerant flow of the air-conditioning simultaneous multi-air conditioner of Figure 1 during the operation of the cooling room.

Figure 2b is an operation diagram showing the refrigerant flow of the air-conditioning simultaneous multi-air conditioner of Figure 1 during all the heating operation.

Figure 3a is an operation diagram showing the refrigerant flow of the cooling and heating simultaneous multi-air conditioner of Figure 1 during the simultaneous operation of the cooling main body.

Figure 3b is an operation diagram showing the refrigerant flow of the heating and cooling simultaneous multi-air conditioner of Figure 1 during the simultaneous operation of the heating main body.

FIG. 4 is an enlarged view of the “part” portion of FIG. 2B. FIG.

Explanation of symbols for main parts of the drawings

A: outdoor unit 1: compressor

2: outdoor heat exchanger 3c: high pressure liquid refrigerant pipe

6a: Four-way valve 6c: Closed tube for pressurization

B: Dispenser C: Indoor unit

61: indoor expansion valve 62: indoor heat exchanger

70: condensate removal means 71: heater

In order to achieve the above object, the present invention, the outdoor unit is installed outdoors and having a compressor and an outdoor heat exchanger therein, a plurality of indoor units each installed in each room of the room, each having an electromagnetic expansion valve and an indoor heat exchanger, A distributor provided between the outdoor unit and the indoor unit for selectively guiding the refrigerant introduced from the outdoor unit to the plurality of indoor units in accordance with an operating condition of a cooling / discharging chamber, a heating / discharging chamber, a cooling main body, and a heating main body simultaneously; It is provided in the outdoor unit to switch the flow of the refrigerant and has a path through which the low-pressure gas coolant flows and the high-pressure gas coolant is blocked when the heating main body or the heating room is operating, and a closed pipe is provided on the path where the high-pressure gas coolant is blocked. The low pressure gas refrigerant in the four-way valve and the four-way valve at the same time during heating of the four-way valve and the heating main body Provides simultaneous heating and cooling type multi-air conditioner group consisting includes a condensate removal means for removing the liquid refrigerant itself is generated by condensation of high-pressure gas refrigerant by heat exchange with the way that input path and the high-pressure gas refrigerant that has been blocked.

Here, the condensate removing means is preferably a heater provided in the closed pipe of the four-way valve to self-evaporate the liquid refrigerant generated in the path of the closed pipe and the high-pressure gas refrigerant is blocked.

In addition, the heater is preferably a coil-type heater surrounding the closed tube. The reason is that in order to increase the heat transfer area by adopting a coil-type heater that can wrap the outer peripheral surface of the closed tube as a whole because the tube is generally cylindrical.

Therefore, according to the present invention, the heating chamber operation for heating the entire room and the heating main body simultaneous operation for cooling a part of the whole room at the same time, the cooling chamber operation for cooling the entire room and the entire part of each room at the same time Cooling main body simultaneous operation is made possible. In addition, since the condensate generated in the path of the four-way valve at the same time the heating main body or all the heating room operation is removed, it is possible to smoothly operate the four-way valve when changing the main body by the cooling operation and the refrigeration efficiency is improved.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the condensate removal apparatus for a simultaneous heating and cooling simultaneous multi-air conditioner and air conditioning multi-air conditioner according to the present invention.

First, referring to FIG. 1, the air-conditioning simultaneous multi-air conditioner according to the present invention will be described. For convenience of explanation, 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 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. And an outdoor heat exchanger (2), and the like, and the distributor (B) includes a guide pipe portion (20) and a valve portion (30). Each indoor unit (C) has an indoor heat exchanger (62) and an electronic expansion. The valve 61 etc. are built in each.

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

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

The outdoor unit A is connected to the compressor 1, the outdoor heat exchanger 2, and the compressor 1, as shown in FIG. 1, to guide refrigerant to the distributor B, or A piping unit for guiding the refrigerant to the compressor, and a switching unit (6) provided on the piping unit in the outdoor unit for switching the flow of the refrigerant.

Here, the piping unit is connected to the discharge end of the compressor (1) and the distributor (B), the first connecting pipe 3, the outdoor heat exchanger (2) is in between, and the first A second connection pipe 4 connecting the front end side 3a of the connection pipe (the discharge side of the compressor among the first connection pipes) and the distributor B to guide only the refrigerant in a high-pressure gas state, and the compressor 1 It is preferably made of a third connecting pipe (5) connecting the suction end and the distributor (B).

1, the switching unit 6 is provided on a section between the second connection pipe 4 and the outdoor heat exchanger 2 of the first connection pipe 3. Equipped with a four-way valve 6a, an auxiliary connecting pipe 6b connecting the four-way valve 6a and the third connecting pipe 5, and the four-way valve 6a to operate the heating chamber and heating main body simultaneously. Preferably, the valve body 16 is formed of a pressurizing closed tube 6c for guiding and blocking a predetermined amount of refrigerant so that one side of the valve body 16 is continuously pressurized.

Having such a piping unit and a switching unit, the section (3c) between the outdoor heat exchanger (2) and the distributor (B) of the first connecting pipe (3) is a "high pressure liquid refrigerant pipe through which a high-pressure liquid refrigerant flows; And the second connection pipe 4 is specified as a "high pressure gaseous refrigerant pipe" through which a high-pressure gaseous refrigerant flows, and the third connection pipe 5 is defined as a " Low pressure gas coolant tube '. Details of this can be seen through the operation description below.

On the other hand, during simultaneous operation of the cooling chamber and the cooling main body, the refrigerant discharged from the outdoor heat exchanger 2 continues to flow into the distributor B along the high pressure liquid refrigerant section 3c of the first connection pipe 3. In addition, it is more preferable that the refrigerant flowing into the outdoor heat exchanger 2 expands and flows when the heating chamber and the heating main body are operated at the same time.

To this end, as shown in Figure 1, the high-pressure liquid refrigerant section (3c) of the first connecting pipe (3) is provided in the heating chamber, heating the main body at the same time to shut off the flow of the refrigerant during operation and cooling chamber, cooling main body at the same time Parallel pipes for guiding the refrigerant during operation at the same time as the heating chamber and the heating main body are provided in parallel with the check valve 7a for passing the refrigerant during operation and the high pressure liquid refrigerant section 3c at the boundary of the check valve 7a. 7b) and a heating electromagnetic expansion valve 7c provided in the parallel pipe 7b to expand the refrigerant flowing into the outdoor heat exchanger 2 when the heating chamber and the heating main body are operated at the same time. desirable.

Incidentally, reference numeral 9 denotes an accumulator.

Secondly, the distributor B has the following components.

As shown in FIG. 1, the distributor B may transfer refrigerant introduced into the indoor unit C from the first connection pipe 3 or the second connection pipe 4 of the outdoor unit A to each indoor unit C. A guide pipe unit 20 for re-guiding the refrigerant exchanged with each other in the indoor unit to the first connection pipe 3 or the third connection pipe 5 of the outdoor unit together with the guide box; Preferably, the valve unit 30 is configured to control the flow of the refrigerant in the guide pipe 20 so that the refrigerant is selectively introduced into the indoor unit C.

Here, the guide pipe portion 30 is connected to the high pressure liquid refrigerant section (3c) of the first connection pipe 3, the high pressure liquid refrigerant connection pipe 21 for guiding the high pressure liquid refrigerant, and the high pressure liquid phase A high pressure liquid refrigerant branch pipe 22 branched from the refrigerant connection pipe 21 to guide the high pressure liquid refrigerant, and a high pressure gas refrigerant connection pipe connected to the second connection pipe 4 to guide the high pressure gas phase refrigerant ( 23), a high-pressure gaseous refrigerant branch pipe (24) branched from the high-pressure gaseous refrigerant connection pipe (23) to guide the high-pressure gaseous refrigerant, and a low-pressure gaseous refrigerant branched from each of the high-pressure gaseous refrigerant branch pipes (24) A low pressure gas refrigerant refrigerant pipe (25) for guiding the low pressure gas refrigerant refrigerant pipe (26) connected to the third connection pipe (5) by laminating each of the low pressure gas refrigerant refrigerant pipes (25) into one This is preferred.

The valve unit 30 is provided in each of the high pressure gas refrigerant branch pipes 24 and the low pressure gas refrigerant branch pipes 25, respectively, and an anisotropic valve 31 selectively turned on / off according to operating conditions. , 32).

In addition, as shown in Figure 1, in order to prevent the high-pressure gas state refrigerant stagnated in the second connection pipe (4) during the operation of the cold discharge chamber, the second connection pipe (4) and the low pressure It is more preferable that the liquefied blocking means 27 is further provided between the gas phase refrigerant connection pipes 26. The reason for this is that when the high-pressure gaseous refrigerant stays liquefied as it is in the second connection pipe 4, there is a possibility that a shortage of refrigerant occurs in the compressor 1.

Here, the liquefied blocking means 27, as shown in Figure 1, the bypass pipe (27a) for connecting the second connecting pipe (4) and the low pressure gas refrigerant refrigerant pipe (26), and the bypass It is preferably made of a conversion electromagnetic expansion valve 27b provided on the pass pipe 27a and converting the refrigerant stagnated in the second connection pipe 4 into a low pressure gas state while controlling the opening amount thereof.

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

As shown in FIG. 1, each indoor unit C includes an indoor heat exchanger 62 and an electromagnetic expansion valve 61 which are extended between the gas phase refrigerant branch pipe 22 and the liquid refrigerant branch pipe 24. And, it comprises an indoor fan (not shown) for applying a blow to the indoor heat exchanger.

Fourth, the condensate removal device has the following components.

Prior to the description, referring to the necessity of the condensate removing device, the condensate is caused by heat exchange between the path into which the low-pressure gaseous refrigerant in the four-way valve 6a flows and the path L from which the high-pressure gaseous refrigerant is blocked when the heating main body or the heating chamber is operated at all. Thereby, there is a fear that the valve body of the four-way valve does not operate due to obstruction of the condensate when the main body is changed by the cooling operation, and the condensate flows into the indoor heat exchanger 62 when the main body is changed by the heating operation, thereby reducing the freezing efficiency. Therefore, condensate removal means 70 is provided for self-removing the refrigerant condensed in the four-way valve 6a, that is, the path in which the high-pressure gaseous refrigerant is blocked and the refrigerant condensed in the closed tube.

Here, the condensate removing means 70, as shown in Figures 1 and 4, is provided in the pressure closing tube (6c) of the four-way valve (6a) is a pressure closing tube (6c) and the high pressure gas phase It is preferable that the heater 71 for evaporating and removing the liquid refrigerant generated in the path L through which the refrigerant is blocked.

Furthermore, it is preferable that the heater 71 is a coil-type heater wrapping the pressurized closing tube 6c as shown in FIG. 4. The reason for this is that the tube is generally cylindrical, so that the heat transfer area is further increased by employing a coil-type heater that can completely wrap the outer circumferential surface of the pressurized closed tube 6c.

On the other hand, the condensate removal device according to the invention can be operated in the following way. That is, in one embodiment, the heater 71 may be continuously operated at a predetermined amount of heat Q while the heating main body is simultaneously operated or the heating whole room operation is performed. In another embodiment, the simultaneous heating main body or the heating room operation is performed. If it is determined that the condensation refrigerant has accumulated a predetermined amount in the road (L) and the pressurized closed tube (6c) in which the high-pressure gas refrigerant of the four-way valve (6a) is blocked during the process, it can be operated at a time with a heat quantity larger than Q for a short time. It may be.

In particular, the heater operation time mentioned in the operation method of the other embodiment is an experimental value obtained by experiment because it depends on the capacity of each device.

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 Figure 2a, during the operation of the cooling chamber, the refrigerant on the high pressure discharged from the compressor (1) flows along the front end side (3a) of the first connecting pipe 3, the switching unit (6) ), Most of the flow is continuously introduced into the outdoor heat exchanger 2 along the rear end side 3b of the first connection pipe and condensed, and then through the check valve 7a, the high pressure liquid refrigerant section of the first connection pipe. Along with (3c) it is introduced into the high pressure liquid refrigerant connection pipe 21 of the distributor (B). Then, the remaining part of the high pressure gas refrigerant is incorporated into the liquefaction bypass tube 27a by blocking the anisotropic valve 31 on the high pressure gas refrigerant branch pipe 24 side of the distributor B, and then converts the electromagnetic expansion. Through the valve 27b, the refrigerant is converted into the low pressure refrigerant and flows into the low pressure gas refrigerant connecting pipe 26 of the distributor B.

Then, the high pressure liquid refrigerant flowing into the high pressure liquid refrigerant connection pipe 21 of the distributor B is branched into the high pressure liquid refrigerant branch pipe 22 and then expanded while passing through each of the indoor side electromagnetic expansion valves 61. And it is evaporated while passing through each indoor heat exchanger (62) to cool each room.

Thereafter, the evaporated refrigerant is incorporated into the low pressure gas refrigerant refrigerant pipe (26) while passing through each low pressure gas refrigerant refrigerant pipe (25) by blocking the anisotropic valve (31) on each side of the high pressure gas refrigerant refrigerant pipe (24). It is sucked into the compressor (1). At this time, a part is introduced into the pressurized closed pipe 6c by the four-way valve 6a which is already switched along the auxiliary connecting pipe 6b, but no further flow is performed, and is finally sucked into the compressor 1.

On the other hand, the refrigerant condensed in the four-way valve (6a) and the pressure closing tube (6c) is evaporated by the operation of the heater (71).

Secondly, as shown in FIG. 2B, during the heating chamber operation, the refrigerant on the high pressure gas discharged from the compressor 1 flows along the front end side 3a of the first connection pipe 3 and then the switching unit 6. By the switching of the inflow into the high-pressure gas refrigerant connecting pipe 23 of the distributor (B) in a high-pressure gas state without passing through the outdoor heat exchanger (2).

Then, the high pressure gas refrigerant introduced into the high pressure gas refrigerant connection pipe 23 of the distributor B is branched into the high pressure gas refrigerant refrigerant pipe 24 and then heats each room while passing through each indoor heat exchanger 62. It is condensed with Sikkim.

Thereafter, the condensed refrigerant flows along the high pressure liquid refrigerant branch pipe (22) after passing through the open-side electronic expansion valve (61), and then collects into the high pressure liquid refrigerant connection pipe (21), and then the first connection pipe. (3) flows along the high-pressure liquid refrigerant section (3c), expands through the outdoor electromagnetic expansion valve (7c) by blocking the check valve (7a), and evaporates through the outdoor heat exchanger (2), and continues to 1 Suction flows along the rear end side 3b of the connecting pipe 3, and is sucked into the compressor 1 through the auxiliary connecting pipe 6b and the low-pressure gas refrigerant pipe 5 in sequence by an already switched four-way valve 6a. Will be.

Third, as shown in FIG. 3A, during the simultaneous operation of the cooling main body, the refrigerant on the high pressure gas discharged from the compressor 1 flows along the front end side 3a of the first connection pipe 3, 2 is introduced into the high pressure gas refrigerant connecting pipe 23 of the distributor B along the connecting pipe 4, and the remaining part is continuously rearward of the first connecting pipe 3 by the switching of the switching unit 6; It flows along the side 3b and flows into the outdoor heat exchanger 2 to condense. The condensed high pressure liquid refrigerant passes through the check valve 7a and follows the high pressure liquid refrigerant section 3c of the first connection pipe. It is introduced into the high pressure liquid refrigerant connection pipe 21 of the distributor (B).

The refrigerant flowing into the high pressure liquid refrigerant connection pipe 21 of the distributor B is branched into the first and second high pressure liquid refrigerant branch pipes 22a and 22b, respectively, and then the first and second indoor side expansion valves respectively. It expands through 61a and 61b and evaporates while passing through the first and second indoor heat exchangers 62a and 62b, respectively, to cool each room.

At the same time, the refrigerant flowing into the high pressure gas refrigerant tube 23 of the distributor B flows into the third high pressure gas refrigerant branch tube 24c and then passes through the third indoor heat exchanger 62c to require heating. After the room is heated, it is joined to the high pressure liquid refrigerant connection pipe 21 described above via the third indoor-side electromagnetic expansion valve 61c and the third high pressure liquid refrigerant branch pipe 22c. Eventually, the first and second high pressure liquid refrigerant branch pipes 22a and 22b selected together with the above-described liquid refrigerant are branched as necessary and then expanded while passing through the first and second indoor side electromagnetic expansion valves 61a and 61b, respectively. While evaporating through the first and second indoor heat exchangers 62a and 62b, the respective rooms are cooled.

Thereafter, the evaporated refrigerant flows along the first and second low pressure gas refrigerant branch pipes 25a and 25b by blocking the anisotropic valves 31a and 31b on the side of the first and second high pressure gas refrigerant branch pipes 24 and then the low pressure gas phase. The refrigerant is connected to the connection pipe 26, and then is sucked into the compressor (1) while flowing along the low pressure gas refrigerant pipe (26).

Fourth, as shown in Figure 3b, during the simultaneous heating operation, the refrigerant on the high pressure discharged from the compressor (1) flows along the front end side (3a) of the first connecting pipe, the switching of the switching unit (6) By the high pressure gas refrigerant pipe (4) through the high pressure gas refrigerant connecting pipe 23 of the distributor (B) in a high pressure state.

The refrigerant on the high pressure gas introduced into the high pressure gas refrigerant connecting pipe 23 of the distributor B is branched into the first and second high pressure gas refrigerant refrigerant pipes 24a and 24b, respectively, and then the first and second indoor heat exchangers. Through each of 62a and 62b, each room is heated and condensed.

Thereafter, the condensed refrigerant flows through the first and second high pressure liquid refrigerant branch pipes 22a and 22b after passing through the opened first and second indoor electromagnetic expansion valves 61a and 61b, respectively, and then is connected to the high pressure liquid refrigerant connection pipe. Are gathered at (21). At this time, a part of the condensed refrigerant flows along the high pressure liquid refrigerant connection pipe 21 and then flows into the high pressure liquid refrigerant section 3c of the first connection pipe 3, and then is blocked by the check valve 7a. It expands through the side solenoid expansion valve 7c, evaporates through the outdoor heat exchanger 2, and continues to flow into the rear end side 3b of the first connection pipe and is assisted by an already switched four-way valve 6a. Passing through the connecting pipe (6b) and the low pressure gas refrigerant pipe (5) in order to flow into the compressor (1).

At the same time, the remaining part of the condensed refrigerant flows into the third high pressure liquid refrigerant branch pipe (22c), expands through the third indoor-side electromagnetic expansion valve (61c), and passes through the third indoor heat exchanger (62c). Evaporated to cool the room requiring cooling. Thereafter, the evaporated refrigerant flows along the third low pressure gas refrigerant branch pipe (24c) by the blocking of the anisotropic valve (31c) at the third high pressure gas refrigerant branch pipe (24c), and then flows into the low pressure gas refrigerant connection pipe (26). Will be.

Thereafter, the refrigerant introduced into the low pressure gas refrigerant connection pipe 26 is sucked into the compressor 1 along the low pressure gas refrigerant pipe 5.

On the other hand, the refrigerant condensed in the four-way valve (6a) and the pressure closing tube (6c) is evaporated by the operation of the heater (71).

In the above-described embodiment, the air-conditioning simultaneous multi-air conditioner and the condensate removing device applied thereto are illustrated and described. However, the condensate removal device according to the present invention is not limited to the air-conditioning simultaneous multi-air conditioner described above, and includes a four-way valve having a path through which a low pressure gaseous refrigerant flows and a high pressure gaseous refrigerant is shut off at the same time as a heating main body or a heating room. It can be used for all air-conditioning simultaneous multi air conditioners.

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.

Referring to the effects of the air-conditioning simultaneous multi-air conditioner and the air-conditioning simultaneous multi-air conditioner according to the present invention described above.

First, according to the present invention, the heating room operation for heating the entire room and the heating main body simultaneous operation for cooling a part of the whole room at the same time, the cooling room operation for cooling the entire room and part of the entire room at the same time There is an advantage that can be operated simultaneously with the cooling main body.

Second, according to the present invention, since the condensate generated in the path of the four-way valve at the time of heating main heating or heating room operation is removed, it is possible to smoothly operate the four-way valve when changing the main body in the cooling operation, and also the advantage of improving the freezing efficiency have.

Claims (3)

An outdoor unit installed outdoors and having a compressor and an outdoor heat exchanger therein; A plurality of indoor units each installed in each room of the interior, each having an electronic expansion valve and an indoor heat exchanger therein; A distributor provided between the outdoor unit and the indoor unit for selectively guiding the refrigerant introduced from the outdoor unit to the plurality of indoor units according to operating conditions of a cooling discharge chamber, a heating and discharging chamber, a cooling main body simultaneously, and a heating main body simultaneously; It is provided in the outdoor unit to switch the flow of the refrigerant in accordance with the operating conditions and has a road through which the low-pressure gas coolant flows and the high-pressure gas coolant is blocked when the heating main body or the heating room is operating, and the high-pressure gas refrigerant is blocked on the road A four-way valve having a closed pipe; Condensate removal means for self-removing the liquid refrigerant generated by the condensation of the high-pressure gaseous refrigerant by the heat exchange between the path of the low-pressure gaseous refrigerant in the four-way valve and the path of blocking the high-pressure gaseous refrigerant in the four-way valve at the same time the heating subject Heating and cooling simultaneous multi-air conditioner, characterized in that the included. The method of claim 1, The condensate removal means is; The simultaneous heating and air-conditioning multi-air conditioner of the four-way valve is provided with a heater for self-evaporating and removing the liquid refrigerant generated in the roadway is blocked in the closed tube and the high-pressure gas refrigerant refrigerant. The method of claim 2, The heater is a heating and cooling simultaneous multi-air conditioner, characterized in that the coil-type heater surrounding the closed tube.