KR100310143B1 - Operation control method for mixed cooling / heating of multi air conditioner - Google Patents

Abstract

Disclosed is a cooling / heating mixed operation control method for a multi-type air conditioner. The present invention discloses a method of controlling a multi-type air conditioner sharing one outdoor heat exchanger, wherein a plurality of different indoor spaces are performed by using a cooling operation or a heating operation in combination with each other or simultaneously. The outdoor fan rotates at low speed. In addition, when any one indoor space is a defrost condition, only the indoor fan is turned off, and when any one indoor space is an overload condition, the outdoor fan is intermittently turned on / off. Therefore, one multi-type air conditioner can be used to perform a cooling operation or a heating operation mixed with each other or at the same time without affecting the plurality of indoor spaces as much as possible, so that the function of the multi-type air conditioner through various operation control It can be used to satisfy various needs of users.

Description

Control method of mixed cooling / heating operation of multi type air conditioner

The present invention relates to a control method for a mixed air / heating operation of a multi-type air conditioner, and more particularly, to a cooling / heating operation of a multi-type air conditioner for performing a cooling operation or a heating operation to a plurality of indoor spaces with one multi-type air conditioner. The present invention relates to a heating mixed operation control method.

In general, an air conditioner is a device used for the purpose of cooling or heating a room. In such an air conditioner, a conventional refrigeration cycle in which refrigerant is circulated is applied. Here, the refrigerant in the liquid state is vaporized when the pressure is kept constant and the temperature is raised, and the gas vaporized in this way is liquefied when the pressure is kept constant and the temperature is decreased. Therefore, the conventional refrigerating cycle performs the cooling or heating function by absorbing the surrounding heat when the liquid refrigerant evaporates as described above and releasing the heat when liquefied. Here, the cooling or heating action of the air conditioner is determined according to the circulation direction of the refrigerant.

On the other hand, a conventional air conditioner is generally provided with one air conditioner for each indoor space, but recently, a multi-type air conditioner having a plurality of the above-mentioned refrigeration cycle in one air conditioner to improve its efficiency It is widely used. Each of the multi-type air conditioners performs a cooling operation or a heating operation.

1 is a control block diagram of a general multi air conditioner as described above. In Fig. 1, reference numeral 10 denotes a room A indoor unit, 11 room A indoor heat exchanger, 12 room A indoor fan, 13 room A compressor, 14 room A 4-way valve, and 15 room A capillary. Room A indoor unit (10) is provided with an indoor heat exchanger (11) and an indoor fan (12). Further, reference numeral 31 denotes an outdoor heat exchanger and 32 denotes an outdoor fan. The outdoor heat exchanger 31, the chamber A compressor 13, the chamber A four-way valve 14, the chamber A capillary 15, and the chamber A indoor heat exchanger 11 constitute one refrigeration cycle. Reference numeral 20 denotes a room B indoor unit, 21 room B heat exchanger, 22 room B fan, 23 room B compressor, 24 room B 4-way valve, and 25 room B capillary. These are the same as the A measured components described above, and constitute a separate refrigeration cycle sharing the outdoor heat exchanger (31). The outdoor heat exchanger 31 and each of the indoor heat exchangers 11 and 21 heat or cool the surrounding air by using the action of vaporizing or liquefying the refrigerant therein. The compressor (13) 23 compresses the refrigerant to a predetermined pressure, the capillary tubes (15) and (25) adjust the pressure of the refrigerant, and the four-way valves (14) and (24) select the refrigerant circulation direction for cooling or heating. Decide on driving. The outdoor fan 32 and the indoor fan 12, 22 are installed in the vicinity of the outdoor heat exchanger 31 and each indoor heat exchanger 11, 21 to blow wind to increase the heat exchange efficiency. Reference numeral 30 denotes a control unit, which controls the operation state of the outdoor fan 32, the indoor fan 12, 22, the compressor 13, 23, and the four-way valve 14, 24. In addition, each of the indoor units 10 and 20 including the above-described indoor heat exchangers 11 and 21 and the indoor fans 12 and 22 is disposed in different rooms A and B, respectively. Other components are preferably arranged in the outdoor space.

FIG. 2 is a flowchart illustrating a method for controlling a conventional multi-type air conditioner, FIG. 3 is a flowchart illustrating a room A cooling operation of FIG. 2, and FIG. 4 is a diagram illustrating a cooling operation of room A and room B of FIG. 2. The flowchart shown.

The operation control method of the conventional multi-type air conditioner configured as described above will be described with reference to FIGS. 1 to 4.

First, when the cooling operation is selected for each room A and room B by the user, the controller 30 controls each room A indoor unit 10 and room B indoor unit 20 to be cooled in operation ( S101-S103).

That is, the control unit 30 turns on the four-way valves 14 and 24 and drives the compressors 13 and 23 so that the coolant flows in the direction of the solid arrow (see FIG. 1). Thus, the compressors 13 and 23 compress the refrigerant at high temperature and high pressure, and the refrigerant is transferred to the outdoor heat exchanger 31 via the four-way valves 14 and 24. The refrigerant releases its heat in the outdoor heat exchanger 31 and is decompressed via the capillary tubes 15 and 25. The refrigerant thus decompressed is delivered to the indoor heat exchanger (11) (21), where the ambient heat is absorbed to cool the room and then delivered to the compressor (13) (23).

Therefore, as shown in FIG. 3, when room A is a defrosting condition (S203) or room B is a defrosting condition in a state in which cooling operations of room A and room B are performed (S201 to S202). S204) Perform defrosting operations for both Room A and Room B (S205 to S206). At this time, the controller 30 controls each of the indoor fans 12 and 22 to the off state.

In addition, when the user selects the cooling operation in the room A room, and the room B has not selected any of the cooling and heating operations, the controller 30 controls only the indoor unit 10 of the room A to be cooled in operation (S104 to S105). ). As shown in FIG. 4, the cooling operation of the chamber A alone is stopped in the state in which the cooling operation of the chamber A is performed (S301 to S302). Here, when room A is a defrosting condition (S303), the defrosting operation is performed on room A (S304). At this time, the control unit 30 controls the room A indoor fan 12 in the off state.

On the other hand, when the user selects the cooling operation in the room A room, and the heating operation is selected in the room B, the control unit 30 performs the cooling operation only for the room A previously selected (S105), and the heating operation of the room B is impossible. (S106). The reason is that since one outdoor heat exchanger 31 is shared by a plurality of refrigeration cycles, the reliability of refrigeration cycles due to different operating conditions is prevented. Therefore, even in this case, as shown in FIG. 4, only the indoor unit 10 of the room A is controlled to be cooled in operation (S301 to S304).

In addition, when the heating operation is selected for each room A and room B by the user (S107 to S109), when the heating operation is selected for room A and none is selected for room B (S110 to S111), A In the case where the heating operation is selected and the room B is selected as the cooling operation (S112), the operation is similar to the above-mentioned cooling operation. The only difference is that the four-way valves 14 and 24 are turned off to heat the circulation direction of the refrigeration cycle. It is converted to operation (dotted arrow direction). In this case, when the cooling operation of the room B is selected while the heating operation is selected in the room A, the heating operation is performed only for the previously selected room A, and the cooling operation of the room B is impossible.

However, the operation control method of the conventional multi-type air conditioner is a reliability of the refrigeration cycle when the operation state of any one of a plurality of indoor spaces, room A or room B is determined and cooling or heating operation is performed. In order to prevent the deterioration, the other rooms are not able to select an operation state different from the above-described operation state. In other words, if room A is cooled, room B cannot be heated, and if room A is heated, room B cannot be cooled. Therefore, various operation controls cannot be achieved. There is a problem that can not meet the various needs of the user.

Accordingly, the present invention has been made in order to solve the above problems, the object of the multi-type air conditioner to perform a combination of the cooling operation or heating operation for each or a plurality of indoor space with one multi-type air conditioner To provide a cooling / heating mixed operation control method of the.

1 is a control block diagram of a general multi-type air conditioner,

2 is a flowchart illustrating a driving control method of a conventional multi-type air conditioner;

3 is a flow chart showing the room A cooling operation of FIG.

4 is a flow chart showing the cooling operation of room A and room B of FIG.

Figure 5 is a flow chart showing a mixed air / heating control method of the multi-type air conditioner according to the present invention,

Figure 6 is a flow chart showing a mixed cooling / heating operation of Room A and Room B of FIG.

Explanation of symbols on the main parts of the drawings

10: Room A indoor unit 11: Room A indoor heat exchanger

12: Room A indoor fan 13: Room A compressor

14: A chamber 4-way valve 15: A chamber capillary

20: room B indoor unit 21: room B indoor heat exchanger

22: Room B indoor fan 23: Room B compressor

24: B chamber 4-way valve 25: B chamber capillary

30 control unit 31 outdoor heat exchanger

32: outdoor fan

In order to achieve the above object, a mixed air / heating operation control method for a multi-type air conditioner according to the present invention includes one indoor heat exchanger and includes a plurality of indoor air units each having an indoor heat exchanger, an indoor fan, and a compressor. In the control method of a multi-type air conditioner, a cooling operation or a heating operation is performed in a mixture of a plurality of different indoor spaces, respectively or simultaneously, and the outdoor fan is rotated at a low speed while the cooling and heating operations are performed in a mixed manner. It is characterized by.

In addition, in a state in which the cooling operation or the heating operation is performed in a mixed state with respect to the plurality of different indoor spaces at the same time, when any one indoor space is a defrost condition, only the indoor fan is controlled to be turned off.

In addition, in a state in which the cooling operation or the heating operation is performed in a mixed state for the plurality of different indoor spaces at the same time, when any one of the indoor spaces is an overload condition, the outdoor fan is controlled to be intermittently turned on / off.

Therefore, a single air conditioner can be used to perform a cooling operation or a heating operation for a plurality of indoor spaces individually or simultaneously, so that the functions of the multi air conditioners can be sufficiently exhibited through various operation controls. Can satisfy needs.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the mixed air / heating mixed operation control method of the multi-type air conditioner according to the present invention will be described in detail, the same components as in the prior art will be described by applying the same reference numerals.

FIG. 5 is a flowchart illustrating a method of controlling a mixed air / heating operation of a multi-type air conditioner according to the present invention, and FIG. 6 is a flowchart illustrating a mixed air / heating operation of room A and room B of FIG. 5.

As shown in FIG. 5, the present invention provides the steps of performing the cooling operation for both the room A and the room B (S401 to S403), and performing the cooling operation only to the room A (S404 to S405); In this case, the steps S407 to S409 for performing the heating operation for both the room A and the room B, and the steps S410 to S411 for performing the heating operation only for the room A are the same as in the conventional operation. Detailed description will be omitted. However, the main feature of the present invention further includes a step (S406) and a step (S412) of simultaneously performing the cooling operation and the heating operation for room A and room B.

If such a cooling / heating mixed operation step described in more detail with reference to Figure 6 as follows.

First, when the cooling operation (S501) is performed for the chamber A, the controller 30 turns on the chamber A 4-way valve 14 and drives the compressor 13 to allow the refrigerant to flow in the direction of the solid arrow. (See Figure 1). Therefore, the compressor 13 compresses the refrigerant at high temperature and high pressure, and the refrigerant is delivered to the outdoor heat exchanger 31 via the four-way valve 14. The refrigerant releases heat from the outdoor heat exchanger 31 and is decompressed via the capillary tube 15. The refrigerant thus decompressed is delivered to the indoor heat exchanger (11), where the surrounding heat is absorbed to cool the room and then delivered to the compressor (13).

As described above, the cooling operation of Room A is performed and the heating operation is performed in Room B (S502). That is, the control unit 30 turns off the B-room 4-way valve 24 and drives the compressor 23 to allow the refrigerant to flow in the direction of the dotted arrow (see FIG. 1). Thus, the compressor 23 compresses the refrigerant at high temperature and high pressure, and the refrigerant is delivered to the indoor heat exchanger 21 via the four-way valve 24. The refrigerant is released from the indoor heat exchanger 21 to heat the room, and then decompressed via the capillary tube 25. The refrigerant decompressed in this way is transferred to the outdoor heat exchanger (31) to absorb the surrounding heat and then transferred to the compressor (23) via the four-way valve (24). As described above, the controller 30 rotates the outdoor fan 32 at a low speed in a state in which a plurality of different indoor spaces A and B rooms are simultaneously used in a cooling operation or a heating operation, thereby reducing the reliability of the refrigeration cycle. It is preferable to prevent (S503). In the mixed cooling / heating operation state, the outdoor heat exchanger 31 partially generates heat and partially absorbs heat, thereby increasing heat exchange efficiency of each portion by the interaction between heat and heat. Therefore, the heat exchange efficiency is increased more than necessary so that both the cooling and heating operations are out of the standard operating state, and the compressors 13 and 23 may be overloaded. However, by rotating the outdoor fan 32 at a low speed as described above, the heat exchange efficiency can be attenuated by an increase in heat exchange efficiency by heat generation and endothermic operation. Therefore, the standard heat exchange efficiency can be maintained during cold / heating mixed operation. It is possible to prevent abnormality of heating operation.

In addition, in a state in which the cooling operation or the heating operation is performed in a mixed state with respect to the plurality of different indoor spaces at the same time, for example, in any one indoor space, when the room A is in a defrost condition, the controller 30 may include a corresponding indoor fan ( 12) Perform room A defrosting operation to control to turn off only (S504 to S506). On the other hand, in a state in which the cooling operation or the heating operation is mixed to perform a plurality of different indoor spaces at the same time, for example, any one indoor space, when the room B is an overload condition, the control unit 30 is an outdoor fan 32 ) To perform intermittent room B overload control to control the intermittent on / off (S507 to S509). Therefore, the cooling / heating mixed operation may be performed for each indoor space while minimizing the influence between the different indoor spaces A and B rooms, thereby ensuring the reliability of each refrigeration cycle.

As described above, according to the control method of the mixed air / heating operation of the multi-type air conditioner according to the present invention, the single-type air conditioner can be operated individually or simultaneously while the multi-type air conditioner does not affect each other as much as possible. Since the heating operation can be performed in a mixed manner, the function of the multi-type air conditioner can be sufficiently exhibited through various operation control, and the user's various needs can be satisfied.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are intended to fall within the scope of the claims set forth.

Claims (3)

In the cooling and heating mixed operation control method of a multi-type air conditioner having a plurality of indoor unit, each having an indoor heat exchanger, a salinity fan and a compressor, sharing one outdoor heat exchanger, In the multi-type air conditioner of the plurality of different indoor spaces, respectively, or at the same time to perform a cooling operation and a heating operation mixed, the outdoor fan is rotated at a low speed in a state of performing a cooling operation and a heating operation mixed Cooling / heating mixed operation control method. The method of claim 1, wherein in the state in which the cooling operation or the heating operation is performed in a mixed manner with respect to the plurality of different indoor spaces simultaneously, when the indoor space is a defrost condition, only the indoor fan is controlled to be turned off. A mixed air / heating operation control method for a multi-type air conditioner. According to claim 1, In the state of performing a cooling operation or a heating operation mixed with the plurality of different indoor space at the same time, if any one of the indoor space is an overload condition, the outdoor fan is controlled to be intermittently turned on / off Cooling / heating mixed operation control method of a multi-type air conditioner, characterized in that.