JP2006308212A - Air-conditioning system and its operation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain high efficiency operation avoiding on-off operation in the low load case. <P>SOLUTION: This air-conditioning system comprises a plurality of inverter-controlled package type air conditioners 1, 2 with a plurality of indoor units 5, 6 connected to an outdoor unit 3 and an outdoor unit 4, wherein the indoor units 5 provided at one air-conditioner 1, and the indoor units 6 provided at the other air conditioner 2 are alternately arranged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioning system including a plurality of package-type air conditioners in which a plurality of indoor units are connected to one outdoor unit, and an operation method thereof.

Conventionally, an outdoor unit in which a compressor, an outdoor heat exchanger, fins, an accumulator, etc. are unitized, and an indoor unit in which a decompressor (expansion valve), an indoor heat exchanger, fins, etc. are unitized circulate refrigerant. A package type air conditioner connected via a refrigerant pipe or the like is provided. Some package-type air conditioners have a plurality of indoor units connected to one outdoor unit.
Recent air conditioners are capable of high-efficiency operation by inverter control even when the air conditioning load is low (see, for example, Patent Document 1).
In recent years, an air conditioner has been proposed that can perform individual air conditioning with less heat loss by providing means for supplying conditioned air according to different air conditioning requirements. While blowing air to the perimeter side in the living room, it is possible to blow cooling air to the interior side of the living room (see, for example, Patent Document 2).

By the way, when air conditioning in a large-area room is performed by the above-described package type air conditioner, an air conditioning system in which a plurality of inverter-controlled air conditioners are installed in one room is employed. In this case, conventionally, a range to be borne by each air conditioner in the living room is determined, and a plurality of indoor units provided in one air conditioner are arranged firmly in the determined range. It is common. In addition, when air conditioning in a multi-layer building is performed by the package type air conditioner described above, a layer to be borne by each air conditioner in the building is defined, and a plurality of air conditioners provided in one air conditioner In general, all indoor units are arranged in the defined layer.
Japanese Patent Laid-Open No. 2003-214685 JP-A-5-157278

  However, in the conventional air conditioning system provided with a plurality of inverter-controlled air conditioners as described above, there are restrictions on the minimum start and stop times and control time constants at low load even when the output is actually above the minimum output of the inverter. Due to such a large problem, there is a problem that the operation becomes ON-OFF operation, and the operation has to be performed with low energy consumption efficiency (COP). In addition, even when an air conditioner capable of performing the individual air conditioning described above is used, there is a problem that the operation becomes an ON-OFF operation at a low load, and the operation must be performed with a low COP.

  The present invention has been made in consideration of the above-described conventional problems, and an object thereof is to avoid an ON-OFF operation at a low load and realize a high-efficiency operation.

  The invention according to claim 1 is an air conditioning system in which a plurality of indoor units are connected to one outdoor unit, and a plurality of inverter-controlled package type air conditioners are provided. And the indoor unit provided in the other air conditioner are arranged in a staggered manner.

  Because of these features, each air conditioner can be put into a separate operating state, which makes it possible to achieve a low-load air conditioning state as a whole. As a whole air conditioning, the load is low.

  The invention according to claim 2 is characterized in that, in the operation method of the air conditioning system according to claim 1, one air conditioner is operated for cooling and heating, and the other air conditioner is operated for blowing.

  Due to such a feature, even if each air conditioner does not have a low load, the overall load becomes low.

  According to a third aspect of the present invention, in the method of operating an air conditioning system according to the second aspect, a plurality of indoor units are respectively installed on a ceiling in the room, and one of the plurality of indoor units performs the cooling operation. The indoor unit provided in the air conditioner is set so that the conditioned air is blown out in a direction along the ceiling, and the indoor unit provided in the other air conditioner performing the air blowing operation is provided with the surface of the ceiling. It is characterized by setting so that blown air is blown off obliquely.

  Due to such a feature, the cooled air and the blown air are properly mixed uniformly, and the entire room is adjusted to an appropriate temperature without unevenness.

  According to a fourth aspect of the present invention, in the method for operating an air conditioning system according to the second or third aspect, the one air conditioner that has been performing the cooling / heating operation is switched to the air blowing operation and the other air conditioning that has been performing the air blowing operation. It is characterized by comprising a switching step of switching the machine to air conditioning operation.

  Due to such characteristics, the deviation of the operating state in which only one air conditioner performs the cooling and heating operation and only the other air conditioner performs the air blowing operation is corrected, and the operation of each air conditioner is leveled. .

  According to the air-conditioning system and the operation method thereof according to the present invention, since each air conditioner has a low load as a whole without reducing the load on each air conditioner, the ON-OFF operation of each air conditioner at a low load is avoided. And high-efficiency operation can be realized.

  In addition, the indoor unit of the cooling operation system is set so that the conditioned air is blown out in the direction along the ceiling, and the blower air is blown out obliquely with respect to the ceiling surface of the indoor unit of the blower system. By setting to, the entire room is uniformly adjusted to an appropriate temperature, so that appropriate air conditioning can be performed.

  Moreover, while switching one air conditioner which was performing air-conditioning operation to ventilation operation, and performing the switching process which switches the other air conditioner which was performing fan operation to air-conditioning operation, operation of each air conditioner is performed. Since leveling is achieved, it is possible to suppress an uneven load on the air conditioner and to suppress a failure of the air conditioner.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an air conditioning system and an operation method thereof according to the present invention will be described with reference to the drawings.

First, the configuration of the air conditioning system will be described.
FIG. 1 is a schematic diagram illustrating an air conditioning system that performs air conditioning in a large-sized room X. As shown in FIG. 1, the air conditioning system includes a plurality (two in FIG. 1) of air conditioners 1 and 2 that perform cooling, heating, and air blowing operation. Each of the air conditioners 1 and 2 is composed of outdoor units 3 and 4 that form a refrigeration cycle, indoor units 5... 6, and refrigerant pipes 7 and 8, respectively. Each is provided and controlled by an inverter.

The outdoor units 3 and 4 are units (packages) of a compressor, an outdoor heat exchanger, fins, an accumulator, and the like (not shown), and are installed outside the living room X.
The indoor units 5 ..., 6 ... are units (packages) of unillustrated decompressors (expansion valves), indoor heat exchangers, fins, etc., and are installed on the ceiling in the living room X. Further, a plurality (six in the figure) of indoor units 5... 6 are provided for one outdoor unit 3 and 4. The casings 5a, 6a of the indoor units 5 ..., 6 ... are respectively formed with outlets 5b, 6b and suction ports 5c, 6c directed into the living room X, and the outlets 5b, 6b are blown out. A movable louver (not shown) for adjusting the direction is attached.

  In addition, the plurality of indoor units 5 ..., 6 ... are arranged in a matrix at intervals on the ceiling in the living room X, and the plurality of indoor units 5 ... provided in one air conditioner 1 and the other. The plurality of indoor units 6... Provided in the air conditioner 2 are arranged in a staggered manner in the plan view, that is, alternately in a staggered manner.

  The refrigerant pipes 7 and 8 are pipes interposed between the outdoor units 3 and 4 installed outside the room X and the plurality of indoor units 5 and 6 installed inside the room X to connect the two. In this case, the refrigerant is circulated between the outdoor units 3 and 4 and the indoor units 5. In addition, the refrigerant pipes 7 and 8 are configured to be branched into a plurality of parts on the way, and one ends of the refrigerant pipes 7 and 8 are respectively connected to connection portions (not shown) of the outdoor units 3 and 4, and the refrigerant pipes 7 and 8 are branched. The other ends are connected to connecting portions (not shown) of the plurality of indoor units 5.

Next, an operation method of the air conditioning system that operates the air conditioning system having the above-described configuration with a low load will be described.
First, a low-load operation process is performed in which one air conditioner 1 is cooled by an inverter and the other air conditioner 2 is blown. At this time, as shown in FIG. 2, the louver (not shown) of the indoor unit 5... Provided in one air conditioner 1 that performs the cooling operation is supplied to the ceiling surface Y of the living room X from the outlet 5 b. The louver (not shown) of the indoor unit 6 provided in the other air conditioner 2 that performs the air blowing operation is set so that the air is blown in the direction along the blow air A2 from the air outlet 6b to the ceiling surface Y. On the other hand, it sets so that it may blow off diagonally. The angle θ1 in the blowing direction (relative to the ceiling surface Y) of the cooling air A1 is set to be smaller than at least the angle θ2 in the blowing direction (relative to the ceiling surface Y) of the blown air A2.

  Next, after a predetermined time elapses, a switching step is performed in which one air conditioner 1 that has been performing the cooling operation is switched to the blowing operation, and the other air conditioner 2 that has been performing the blowing operation is switched to the cooling operation. At this time, the louvers (not shown) of the indoor units 5... 6 are respectively moved so as to adjust the blown air A2 blown from the blowout port 5b of the one indoor unit 5. It adjusts so that the cooling air A1 which blows off from the blower outlet 6b of indoor unit 6 ... becomes above-mentioned blowing angle (theta) 1. Further, the switching step is repeated at regular intervals.

  According to the air conditioning system having the above-described configuration and the operation method thereof, one air conditioner 1 is set in a cooling operation, and the other air conditioner 2 is set in a blowing operation. Even if 2 is not lightly loaded, the air conditioning of the entire room X is lightly loaded. Thereby, when air-conditioning with a low load is performed, a highly efficient operation can be realized without causing the air conditioners 1 and 2 to be turned on and off.

  Further, the indoor unit 5 provided in one air conditioner 1 that performs the cooling operation is set so that the cooling air A1 is blown out in the direction along the ceiling surface Y, and the other air that performs the air blowing operation. In order to set the indoor units 6... Provided in the conditioner 2 so that the blown air A2 is blown obliquely with respect to the ceiling surface Y, the cooling air A1 and the blown air A2 are properly mixed uniformly. The entire interior of the room X is adjusted to an appropriate temperature without unevenness. As a result, the temperature in the room X can be adjusted without error, and appropriate air conditioning can be performed.

  Moreover, while switching one air conditioner 1 which was performing cooling operation to ventilation operation, and performing the switching process which switches the other air conditioner 2 which was performing ventilation operation to cooling operation, one air conditioner The bias of the operation state in which only 1 performs the cooling operation and only the other air conditioner 2 performs the air blowing operation is corrected, and the operation of each of the air conditioners 1 and 2 is leveled. As a result, it is possible to suppress a burden on the air conditioners 1 and 2, and to suppress failure of the air conditioners 1 and 2.

  While the embodiments of the air conditioning system and the operation method thereof according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention. For example, in the above-described embodiment, an air conditioning system that performs air conditioning in a large-area living room X with a plurality of air conditioners 1 and 2 is described. The entire building Z constructed in the above may be air-conditioned. Specifically, the indoor units 105 of the one air conditioner 101 and the indoor units 106 of the other air conditioner 102 are installed in the stacked rooms X1 and X2 formed in the building Z, respectively. To do. One indoor unit 105... And the other indoor unit 106... Are arranged in a staggered manner in each of the living rooms X1 and X2. In addition, outdoor units 103 and 104 of both air conditioners 101 and 102 are installed outside a building Z such as a rooftop, and one outdoor unit 103 is installed in each of the indoor rooms X1 and X2 respectively. The other outdoor units 104 are connected to the units 105... Via the refrigerant pipe 107, and the other outdoor units 104 are connected to the other indoor units 106. And like embodiment mentioned above, while carrying out air_conditioning | cooling operation of the one air conditioner 101, air-conditioning of low load can be performed by carrying out the air driving | running operation of the other air conditioner 102. FIG.

Moreover, in the above-described embodiment, one air conditioner 1 is operated for cooling, but in the present invention, one air conditioner may be operated for heating.
Moreover, in above-mentioned embodiment, although indoor unit 5 ..., 6 ... is installed in the ceiling in the living room X, an indoor unit may be a wall-hanging type.

  In the embodiment described above, the louver (not shown) of one of the indoor units 5 on the cooling operation side is blown out in a direction along the ceiling surface Y of the living room X from the air outlet 5b. While setting, the louver (not shown) of the indoor unit 6 on the air blowing operation side is set so that the blown air A2 is blown obliquely with respect to the ceiling surface Y from the air outlet 6b. A louver (not shown) may be swung within a predetermined blowing angle range. Further, in the above-described embodiment, the blowing angle θ1 of the cooling air A1 is smaller than the blowing angle θ2 of the blown air A2, but in the inventions of claims 1, 2, and 4, the conditioned air and the blown air The blowing direction can be changed as appropriate. For example, the blowing angle of the conditioned air may be the same as or larger than the blowing angle of the blown air.

  Further, in the above-described embodiment, the switching process is repeatedly performed at regular intervals, but the present invention may appropriately perform the switching process as needed without setting the switching time. Alternatively, in the invention according to any one of claims 1 to 3, the switching step may not be performed. Thereby, the control means of the air conditioning system can be simplified.

It is a mimetic diagram for explaining an embodiment of an air-conditioning system concerning the present invention, and its operating method. It is a side view for demonstrating embodiment of the air-conditioning system which concerns on this invention, and its operating method. It is a schematic diagram for demonstrating other embodiment of the air conditioning system which concerns on this invention, and its operating method.

Explanation of symbols

1, 2, 101, 102 Air conditioner 3, 4, 103, 104 Outdoor unit 5, 6, 105, 106 Indoor unit

Claims (4)

In an air conditioning system in which a plurality of indoor units are connected to one outdoor unit, and a plurality of inverter-controlled package type air conditioners are provided.
An air conditioning system characterized in that an indoor unit provided in one air conditioner and an indoor unit provided in the other air conditioner are arranged in a staggered manner. In the operation method of the air-conditioning system according to claim 1,
A method for operating an air conditioning system, characterized in that one air conditioner is operated for cooling and heating, and the other air conditioner is operated for air blowing. Multiple indoor units are installed on the ceiling of the room,
Among the plurality of indoor units, the indoor unit provided in one air conditioner that performs the cooling operation is set so that the conditioned air is blown out in the direction along the ceiling, and the other that performs the air blowing operation The operation method of the air conditioning system according to claim 2, wherein the indoor unit provided in the air conditioner is set so that the blown air is blown obliquely with respect to the ceiling surface.   4. The method according to claim 2, further comprising: a switching step of switching one air conditioner that has been performing the air conditioning operation to the air blowing operation and switching the other air conditioner that has been performing the air blowing operation to the air conditioning operation. How to operate the air conditioning system.

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