JP2019215107A - Air conditioning system - Google Patents

Abstract

To propose an air conditioning system that can control sensible heat treatment capacity from becoming excessive.SOLUTION: An air conditioning system (1) includes a control device (40) that executes operation including a state where at least one of the multiple air conditioners (10) serves as a latent heat treatment unit (10-L), at least one of them serves as a sensible heat treatment unit (10-S) and at least one of them serves as a blower (10-F).SELECTED DRAWING: Figure 6

Description

  The present invention relates to an air conditioning system.

  The device described in Patent Literature 1 includes a plurality of air conditioners. Paragraphs 0055 and 0056 of the document describe performing an operation of lowering the sensible heat ratio (sensible heat capacity / total capacity) by lowering the evaporation temperature of a certain indoor unit among a plurality of indoor units.

JP 2010-121798 A

  When a part of the plurality of air conditioners is operated as a latent heat treatment machine and a part is operated as a sensible heat treatment machine, the sensible heat treatment capacity of the entire air conditioning system may be excessive. As a result, for example, the indoor temperature may be excessively lowered, or the latent heat treatment machine or the sensible heat treatment machine may be thermo-off.

  An object of the present disclosure is to propose an air conditioning system that can suppress an excessive sensible heat treatment capacity.

A first aspect is a plurality of air conditioners (10) each of which individually performs a refrigeration cycle and targets the same indoor space (5),
At least one of the plurality of air conditioners (10) becomes a latent heat treatment machine (10-L), at least one becomes a sensible heat treatment machine (10-S), and at least one becomes a blower (10-F). A control device (40) for executing an operation including a state.

  Here, the “latent heat treatment machine” means an air conditioner that dehumidifies air by cooling indoor air to a dew point temperature or lower. “Sensible heat treatment machine” means an air conditioner that cools indoor air without dehumidifying it by cooling the room air at a temperature higher than the dew point temperature. “Blower” means an air conditioner intended to actively circulate room air in the room space (5) by blowing room air without cooling / dehumidifying room air.

  In the first aspect, at least one of the plurality of air conditioners (10) becomes a latent heat treatment machine (10-L) and at least one becomes a sensible heat treatment machine (10-S). The stand is a blower (10-F). The latent heat treatment machine (10-L) handles not only latent heat load but also sensible heat load. The sensible heat treatment machine (10-S) processes the sensible heat load. For this reason, if the number of latent heat treatment machines (10-L) and sensible heat treatment machines (10-S) increases excessively, the sensible heat treatment capacity of the entire air conditioning system (1) may become excessive. On the other hand, when a part of the plurality of air conditioners (10) is a blower (10-F), it is possible to suppress the entire sensible heat treatment capacity of the air conditioning system (1) from being excessive. The blower (10-F) contributes to the circulation of indoor air in the indoor space (5).

The second aspect is the first aspect,
The said control apparatus (40) is an air conditioning system characterized by performing the 1st control which switches the said sensible heat processing machine (10-S) to a blower (10-F) in the said operation | movement.

  In the second aspect, the sensible heat treatment capacity of the entire air conditioning system (1) can be reduced by switching the sensible heat treatment machine (10-S) to the blower (10-F).

A third aspect is the second aspect,
The air conditioning system, wherein the control device (40) performs the first control when at least a condition in which the temperature of the intake air of the sensible heat treatment machine (10-S) is lower than a predetermined value is satisfied in the operation. It is.

  In the third aspect, the first control is performed in a situation where the temperature of the indoor air is relatively low. For this reason, it can be avoided that the temperature of the room air becomes excessively low or that the sensible heat treatment machine (10-S) is turned off.

In a fourth aspect, in any one of the first to third aspects,
The said control apparatus (40) is an air conditioning system characterized by performing the 2nd control which switches the said blower (10-F) to the said sensible heat treatment machine (10-S) in the said operation | movement.

  In the fourth embodiment, the sensible heat treatment capacity of the entire air conditioning system (1) can be increased by switching the blower (10-F) to the sensible heat treatment machine (10-S).

A fifth aspect is the fourth aspect, wherein
The air conditioner system according to claim 1, wherein the control device (40) performs the second control when at least a condition in which the temperature of the intake air of the blower (10-F) is higher than a predetermined value is satisfied in the operation. .

  In the fifth aspect, the second control is performed in a situation where the temperature of the room air is relatively high. For this reason, the indoor air of the indoor space (5) can be quickly cooled.

According to a sixth aspect, in any one of the first to fifth aspects,
The control device (40) is an air conditioning system characterized in that in the operation, a third control for switching the blower (10-F) to the latent heat treatment machine (10-L) is performed.

  In the sixth aspect, by switching the blower (10-F) to the latent heat treatment machine (10-L), the latent heat treatment function and the sensible heat treatment capability of the entire air conditioning system (1) can be increased.

A seventh aspect is the sixth aspect,
The control device (40) is configured to perform the third operation when the indoor humidity is higher than a predetermined value and the air suction temperature of the blower (10-F) is higher than a predetermined value. An air conditioning system characterized by performing control.

  In the seventh aspect, the third control is performed in a situation where the humidity of the indoor space (5) is relatively high and the suction temperature of the blower (10-F) is relatively high. For this reason, the humidity and temperature of indoor space (5) can be reduced rapidly.

  In an eighth aspect based on any one of the first to seventh aspects, the control device (40) switches the blower (10-F) to the latent heat treatment machine (10-L) in the operation. An air conditioning system characterized in that, while performing control, control for switching the latent heat treatment machine (10-L) to a blower (10-F) is not performed.

  In the eighth aspect, by performing control to switch the blower (10-F) to the latent heat treatment machine (10-L), the latent heat treatment capability and the sensible heat treatment capability of the entire air conditioning system (1) can be increased. On the other hand, the control device (40) does not perform control for switching the latent heat treatment machine (10-L) to the blower (10-F). In the indoor heat exchanger (25) of the latent heat treatment machine (10-L), moisture on the surface tends to adhere. For this reason, when the latent heat treatment machine (10-L) is switched to the blower (10-F), moisture evaporates from the surface of the indoor heat exchanger (25), and the evaporated moisture is rapidly supplied to the indoor space (5). There is a possibility of being. In this embodiment, in consideration of this problem, the control for switching the latent heat treatment machine (10-L) to the blower (10-F) is not performed.

  A ninth aspect is the control apparatus according to any one of the first to eighth aspects, wherein the control device (40) performs the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) in the operation. And the number of the blowers (10-F) is changed one by one.

  In the ninth aspect, the type of the air conditioner (10) is changed one by one. For this reason, it can suppress that the sensible heat processing capability and sensible heat processing capability of the whole air conditioning system (1) change greatly.

  A tenth aspect is the control device according to any one of the first to ninth aspects, wherein the control device (40) performs the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) in the operation. , And when the number of the blowers (10-F) is changed, the change of the next number is prohibited until a predetermined time elapses from the time of the change.

  In the tenth aspect, after the number of air conditioners (10) has been changed, a predetermined time has elapsed, and the state (temperature and humidity) of the indoor air has stabilized, the next number of air conditioners (10) has been changed. Changes are made.

An eleventh aspect is any one of the first to tenth aspects,
The control device (40) determines the air direction of the room air of the blower (10-F) from the air direction of the room air in at least one of the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S). The air conditioning system is also characterized by being horizontally oriented.

  In the eleventh aspect, the wind direction of the blower (10-F) is more horizontal than the wind direction of the latent heat treatment machine (10-L), or is more horizontal than the wind direction of the sensible heat treatment machine (10-S). Or more horizontal than the wind direction of the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S). As described above, when the air direction of the blower (10-F) is made closer to the horizontal, the stirring effect of the air blown out from the other air conditioner (10) is improved. Thereby, the temperature and humidity unevenness of the air around other air conditioners (10) can be suppressed.

Drawing 1 is a schematic structure figure of an air-conditioning system concerning an embodiment. FIG. 2 is a schematic configuration diagram of a refrigerant circuit of the air conditioner. FIG. 3 is a schematic configuration diagram illustrating communication relationships of the air conditioning system. FIG. 4 is an air line diagram conceptually showing changes in the air state up to the preliminary operation, the determination process, and the latent microscope separation operation. FIG. 5 is a schematic flowchart from the preliminary operation to the latent-visible separation operation. FIG. 6 is an explanatory diagram conceptually showing how the latent heat load and the sensible heat load are distributed to each air conditioner in the preliminary operation. FIG. 7 is an air line diagram for explaining a bypass factor. FIG. 8 is a flowchart showing processing for determining the number of latent heat treatment machines, the target evaporation temperature, and the air volume in the preliminary operation. FIG. 9 is a flowchart showing processing for determining the number of sensible heat treatment machines, target evaporation temperature, and air volume in the preliminary operation. FIG. 10 is a flowchart showing the air volume control of the latent heat treatment machine in the latent microscope separation operation. FIG. 11 is an explanatory diagram schematically showing changes in the latent heat treatment ability and the sensible heat treatment ability when the air volume is decreased in the air quantity control of the latent heat treatment machine. FIG. 12 is an explanatory view schematically showing changes in the latent heat treatment ability and the sensible heat treatment ability when the air volume is increased in the air volume control of the latent heat treatment machine. FIG. 13 is a flowchart showing the evaporation temperature control of the latent heat treatment machine in the latent microscope separation operation. FIG. 14 is a flowchart showing the air volume control of the sensible heat treatment machine in the latent sensible separation operation. FIG. 15 is a flowchart showing the evaporation temperature control of the sensible heat treatment machine in the latent sensible separation operation. FIG. 16 is a flowchart showing the number change control in the latent-scientific separation operation. FIG. 17 is an explanatory diagram of the latent heat treatment machine selection process (horsepower priority). FIG. 18 is an explanatory diagram of a latent heat treatment machine selection process (preferred suction temperature) according to a modification.

  Hereinafter, the present embodiment will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

<Overall configuration of air conditioning system>
The air conditioning system (1) of the present embodiment targets the same indoor space (5) for air conditioning. The air conditioning system (1) switches between cooling operation, heating operation, and latent microscope separation operation. The air conditioning system (1) includes a plurality of air conditioners (10). In FIG. 1, the air conditioning system (1) illustrates four air conditioners (10), but other numbers may be used as long as the number is two or more. The basic configuration of these air conditioners (10) is the same.

  The air conditioning system (1) of this example is configured by adding an additional unit to existing equipment (existing unit). Each air conditioner (10) of the existing unit is configured to be capable of performing a cooling operation, a heating operation, and an air blowing operation. By adding an additional unit to the existing unit, the latent microscope separation operation can be further executed. The existing unit includes a plurality of air conditioners (10) and a local controller (41) corresponding to each air conditioner (10).

<Basic configuration of air conditioner>
Each air conditioner (10) in the example of FIG. 1 is a so-called pair type air conditioner. That is, the air conditioner (10) of this example has one outdoor unit (11), one indoor unit (12), and two outdoor units (11) and an indoor unit (12) connected to each other. And connecting pipes (13, 14). The outdoor unit (11) is installed outdoors. The indoor unit (12) of this example is installed so as to face the indoor space (5). The indoor unit (12) is configured as a ceiling installation type (strictly speaking, a ceiling hanging type or a ceiling embedded type). Each air conditioner (10) is provided with a remote controller (15). The user can switch the indoor set temperature and the operation mode by operating the remote controller (15).

<Configuration of refrigerant circuit and each device>
As shown in FIG. 2, each air conditioner (10) includes a refrigerant circuit (20). In the refrigerant circuit (20), a vapor compression refrigeration cycle is performed by circulating the filled refrigerant. Connected to the refrigerant circuit (20) are a compressor (21), an outdoor heat exchanger (22), an expansion valve (23), a four-way switching valve (24), and an indoor heat exchanger (25). The compressor (21), the outdoor heat exchanger (22), the expansion valve (23), and the four-way switching valve (24) are provided in the outdoor unit (11). The indoor heat exchanger (25) is provided in the indoor unit (12).

  The compressor (21) is configured by an inverter-type compressor having a variable capacity. That is, the compressor (21) is configured to be able to adjust the rotation speed (operation frequency) of the electric motor by controlling the output of the inverter device. The outdoor heat exchanger (22) is, for example, a fin-and-tube heat exchanger. An outdoor fan (26) is installed in the vicinity of the outdoor heat exchanger (22). In the outdoor heat exchanger (22), the outdoor air blown by the outdoor fan (26) and the refrigerant exchange heat. The expansion valve (23) is an electronic expansion valve with a variable opening. The expansion valve (23) may be provided in the indoor unit (12).

  The four-way switching valve (24) has first to fourth ports (P1, P2, P3, P4). The first port (P1) communicates with the discharge side of the compressor (21), the second port (P2) communicates with the suction side of the compressor (21), and the third port (P3) communicates with the outdoor heat exchanger ( 22) communicates with the gas side end, and the fourth port (P4) communicates with the gas side end of the indoor heat exchanger (25). The four-way selector valve (24) is in a first state (FIG. 2) in which the first port (P1) and the third port (P3) communicate with each other and the second port (P2) and the fourth port (P4) communicate with each other. A state shown by a solid line) and a second state (dashed line in FIG. 2) in which the first port (P1) and the fourth port (P4) communicate with each other and the second port (P2) and the third port (P3) communicate with each other. To the state shown in FIG.

  The indoor heat exchanger (25) is arranged in an internal passage of the indoor unit (12). An indoor fan (27) is provided in the vicinity of the indoor heat exchanger (25). When the indoor fan (27) is operated, the indoor air in the indoor space (5) flows into the internal passage of the indoor unit (12) as intake air. In the indoor heat exchanger (25), the air flowing through the internal passage and the refrigerant exchange heat. The air that has passed through the indoor heat exchanger (25) is supplied to the indoor space (5) as blown air.

  The indoor fan (27) has a variable air volume (the number of rotations of the motor). The air volume of the indoor fan (27) of the present embodiment is configured to be switchable in three stages. Specifically, a so-called fan tap of the indoor fan (27) is switched among an LL tap (slight air volume), an L tap (small air volume), an M tap (medium air volume), and an H tap (large air volume).

  A suction temperature sensor (28) is provided near the indoor unit (12). The suction temperature sensor (28) detects the temperature of the suction air of the corresponding indoor unit (12) as the suction temperature (Th1). The suction temperature sensor (28) may be provided, for example, in the suction port of the indoor unit (12) or in the indoor space (5).

  A suction humidity sensor (29) is provided near the indoor unit (12). The suction humidity sensor (29) detects the humidity (strictly, relative humidity) of the suction air of the corresponding indoor unit (12) as the suction humidity (Rh1). The suction humidity sensor (29) may be provided, for example, in the suction port of the indoor unit (12) or in the indoor space (5).

  The indoor heat exchanger (25) described above is provided with a refrigerant temperature sensor (30). The refrigerant temperature sensor (30) detects the evaporation temperature (Te) of the refrigerant flowing through the indoor heat exchanger (25) in the cooling cycle. The refrigerant temperature sensor (30) detects the condensation temperature (Tc) of the refrigerant flowing through the indoor heat exchanger (25) in the heating cycle.

<Control device>
As shown in FIG. 3, the air conditioning system (1) includes a control device (40) for controlling each air conditioner (10). The control device (40) includes a plurality of local controllers (41), a plurality of wireless LAN adapters (42), a router (43), a communication terminal (44), and a main control unit (45). The local controller (41) is included in the existing unit. The wireless LAN adapter (42), the router (43), and the main control unit (45) are included in the additional unit.

  The plurality of local controllers (41) are provided so as to correspond to the respective air conditioners (10). The local controller (41) includes a processor (for example, a microcontroller) and a memory device (for example, a semiconductor memory) that stores software for operating the processor. The local controller (41) of this example is provided in the corresponding indoor unit (12). The local controller (41) is configured to be able to transmit to the outdoor unit (11) via wireless or wired. The local controller (41) controls components such as the compressor (21), the four-way switching valve (24), the expansion valve (23), the outdoor fan (26), and the indoor fan (27).

  The plurality of wireless LAN adapters (42) are provided so as to correspond to the respective local controllers (41). Each wireless LAN adapter (42) is connected to the Internet (I) via a router (43).

  The communication terminal (44) is a communication device for a user or the like to send a command regarding the latent separation separation operation. The communication terminal (44) is configured by, for example, a smartphone or a tablet PC. The communication terminal (44) has, for example, a touch panel that also serves as a display unit and an operation unit, and a communication interface for communicating with the main control unit via the Internet (I).

  The communication terminal (44) has a processor (for example, a microcontroller) and a memory device (for example, a semiconductor memory) for storing software for operating the processor. The communication terminal (44) stores an application for executing the latent-visible separation operation. By operating the communication terminal (44), the user can switch ON / OFF of the latent microscope separation operation or set the set temperature (RTh) and the set humidity (Rh) during the latent microscope separation operation.

  The main control unit (45) is provided in, for example, a cloud server (C) on the Internet (I). The main control unit (45) is connected to the communication terminal (44) via the Internet (I). Command values (target temperature (RTh), target humidity (Rh), etc.) output from the communication terminal (44) are appropriately input to the main control unit (45). The main control unit (45) is connected to each local controller (41) via the Internet (I). The main controller (45) contains operating information for each air conditioner (10) (suction temperature (Th1), suction humidity (Rh1), evaporation temperature (Te), condensation temperature (Tc), indoor fan (27) An air volume (Q) (fan tap), etc. is input as appropriate, and the main controller (45) calculates parameters for controlling each air conditioner (10) based on these signals. (45) transmits the parameters (update parameters) thus obtained to each local controller (41) at predetermined update intervals (communication intervals) Δt (for example, several tens of seconds). ) Is independently rewritten to update parameters at each update interval ΔT.

−Basic operation−
The basic operation of the air conditioning system (1) will be described. Each air conditioner (10) is configured to be capable of performing a cooling operation, a heating operation, and a blowing operation. These operations can be performed only with existing units.

<Cooling operation>
In the cooling operation, the indoor air in the indoor space (5) is cooled. In the cooling operation, the four-way switching valve (24) of the air conditioner (10) is in the first state, and the compressor (21), the indoor fan (27), and the outdoor fan (26) are operated. In the cooling operation, a first refrigeration cycle (cooling cycle) is performed in which the outdoor heat exchanger (22) serves as a condenser or a radiator and the indoor heat exchanger (25) serves as an evaporator. That is, the refrigerant compressed by the compressor (21) radiates and condenses in the outdoor heat exchanger (22) and is decompressed by the expansion valve (23). The decompressed refrigerant evaporates in the indoor heat exchanger (25) and cools the indoor air. The evaporated refrigerant is sucked into the compressor (21) and compressed again. In the cooling operation, the evaporation temperature (Te) of the indoor heat exchanger (25) is controlled so that the suction temperature (Th1) approaches the target temperature (RTh). Specifically, the control target value (target evaporation temperature (TeS)) of the evaporation temperature (Te) is adjusted based on the suction temperature (Th1) and the target temperature (RTh).

<Thermo-off control / thermo-on control during cooling operation>
During the cooling operation, control for thermo-off the air conditioner (10) and control for thermo-on are appropriately performed. These controls are performed based on the suction temperature (Th1) and the target temperature (RTh).

  Specifically, when the suction temperature (Th1) of the air conditioner (10) during the cooling operation becomes equal to or lower than a predetermined thermo-off temperature (Thoff), the air conditioner (10) enters a rest state (thermo-off control). Here, the thermo-off temperature (Thoff) is set to a value lower than the target temperature (RTh) by a predetermined temperature (for example, 1 ° C.). When the air conditioner (10) enters a rest state (thermo-off state), the refrigerant does not flow through the indoor heat exchanger (25), and the air is not cooled. Specifically, in the air conditioner (10) in the thermo-off state, the compressor (21) is stopped and the refrigeration cycle is not performed. In the air conditioner (10) in the thermo-off state, the air volume of the indoor fan (27) is smaller than the air volume of the indoor fan (27) during the cooling operation (thermo-on state). Specifically, the air volume of the indoor fan (27) is, for example, LL tap (fine air volume) or L tap (small air volume). In the air conditioner (10) in the thermo-off state, the indoor fan (27) may be stopped.

  If the suction temperature (Th1) becomes equal to or higher than a predetermined thermo-on temperature (Thon) while the air-conditioning apparatus (10) is in the thermo-off state, the air-conditioning apparatus (10) returns to the operating state (thermo-on control). Here, the thermo-on temperature (Thon) is set to a value higher than the target temperature (RTh) by a predetermined temperature (for example, 1 ° C.). When the air conditioner (10) is in an operating state (thermo-on state), the above-described cooling operation is resumed.

<Heating operation>
In the heating operation, the indoor air in the indoor space (5) is heated. In the heating operation, the four-way switching valve (24) of the air conditioner (10) is in the second state, and the compressor (21), the indoor fan (27), and the outdoor fan (26) are operated. In the heating operation, a second refrigeration cycle (heating cycle) is performed in which the indoor heat exchanger (25) serves as a condenser or a radiator and the outdoor heat exchanger (22) serves as an evaporator. That is, the refrigerant compressed by the compressor (21) radiates and condenses in the indoor heat exchanger (25) and heats indoor air. The radiated refrigerant is decompressed by the expansion valve (23). The decompressed refrigerant evaporates in the outdoor heat exchanger (22), and is then sucked into the compressor (21) and compressed again. In the heating operation, the condensation temperature (Tc) of the indoor heat exchanger (25) is controlled so that the suction temperature (Th1) approaches the target temperature (RTh). Specifically, the control target value (target condensation temperature (TcS)) of the condensation temperature (Tc) is adjusted based on the suction temperature (Th1) and the target temperature (RTh).

<Thermo-off control / thermo-on control during heating operation>
During the heating operation, control for thermo-off the air conditioner (10) and control for thermo-on are appropriately performed. These controls are performed based on the suction temperature (Th1) and the target temperature (RTh). When the suction temperature (Th1) of the air conditioner (10) during the heating operation is equal to or higher than the predetermined thermo-off temperature (Thoff), the air conditioner (10) is in a resting state (thermo-off state), similar to the cooling operation described above. Become. In addition, when the air conditioner (10) is in the thermo-off state, the heating operation of the air conditioner (10) is resumed when the suction temperature (Th1) becomes equal to or lower than the predetermined thermo-off temperature (Thoff).

<Blower operation>
In the air blowing operation, the indoor air in the indoor space (5) is not cooled and heated, and the indoor air is circulated. In the air blowing operation, the compressor (21) is stopped, and the refrigeration cycle is not performed in the refrigerant circuit (20). On the other hand, the indoor fan (27) is operated. The indoor air flows through the internal passage of the indoor unit (12) and is supplied to the indoor space (5) again. That is, air that is neither cooled nor heated is blown from the indoor unit (12). The fan tap of the indoor fan (27) is set to H tap (large air volume) or M tap (medium air volume), for example. The air volume of the indoor fan (27) of the air conditioner (10) during the air blowing operation is larger than the air volume of the indoor fan (27) of the air conditioner (10) in the thermo-off state.

<Overview of latent-splitting separation operation>
The air conditioning system (1) is configured to be capable of performing a latent sensible separation operation for simultaneously processing a latent heat load and a sensible heat load of the indoor space (5). The latent microscope separation operation includes a state where at least one of the plurality of air conditioners (10) becomes a latent heat treatment machine (10-L) and at least one becomes a sensible heat treatment machine (10-S). Driving. Further, in the latent microscope separation operation of the present embodiment, the air conditioner (10) may be a blower (10-F) (an air conditioner that performs the above-described blowing operation).

  In the latent heat treatment machine (10-L), the evaporation temperature (Te) of the indoor heat exchanger (25) is controlled so as to cool the air to the dew point or lower. Therefore, the latent heat processor (10-L) dehumidifies the indoor air and processes the latent heat load of the indoor space (5). As a general rule, the evaporation temperature (Te) of the sensible heat treatment machine (10-S) is controlled so as to cool the air at a temperature higher than the dew point temperature. Therefore, the sensible heat treatment machine (10-S) cools the indoor air without dehumidifying it and processes the sensible heat load of the indoor space (5). The blower (10-F) performs the blowing operation described above. That is, the blower (10-F) blows / circulates the room air without processing the latent heat load or sensible heat load of the room air. The air volume of the indoor fan (27) of the blower (10-F) is larger than the air volume of the indoor fan (27) of the air conditioner (10) in the thermo-off state described above.

<Preliminary operation>
As shown in FIGS. 4 and 5, the preliminary operation is performed before the latent microscope separation operation is performed. In the preliminary operation, the latent heat treatment machine (10-L), the sensible heat treatment machine (10-S), and the blower (10-F) are used at the start of the latent microscope separation operation (the first operation) performed thereafter. A determination process for determining the air conditioner (10) is performed.

  When the user performs an operation of turning on the latent / visible separation operation using the communication terminal (44), an operation command for executing the latent / visible separation operation is input to the local controller (41). Then, preliminary operation is started (step ST1). In the preliminary operation, all the air conditioners (10) are the air conditioners (the air conditioners that perform the air cooling operation described above). That is, in each air conditioner (10), a cooling cycle is performed, and the indoor fan (27) operates with M taps or H taps. For this reason, the indoor air in the indoor space (5) is quickly cooled.

  In step ST2, after the input of the operation command, a predetermined time A elapses, and a difference (Th1-RTh) between the suction temperature (Th1) of at least one air conditioner (10) and the target temperature (RTh) is determined. When the temperature falls below a predetermined value (for example, 2 ° C.), the process proceeds to step ST4. In step ST3, when a predetermined time B (B> A) has elapsed after the operation command is input, the process proceeds to step ST4. In other words, when the condition for the indoor air in the indoor space (5) to approach the target temperature (RTh) is satisfied by performing the preliminary operation, the process proceeds to the determination processing in step ST4 and step ST5.

  In step ST4, a process of calculating the latent heat load (HL-L) and the sensible heat load (HL-S) of the indoor space (5) is performed. In step ST5, the number of latent heat treatment machines (10-L) and sensible heat treatment machines (10-S) for processing the calculated latent heat load (HL-L) and sensible heat load (HL-S) is determined. . At this time, the air volume (Q) and target evaporation temperature (TeS) of the indoor fan (27) of the latent heat treatment machine (10-L) and the air volume (Q of the indoor fan (27) of the sensible heat treatment machine (10-S) ), The target evaporation temperature (TeS), and the number of blowers (10-F) are also determined.

  The outline of step ST5 will be described with reference to FIG. In step ST5, first, the number of latent heat treatment machines (10-L) capable of processing the calculated latent heat load (HL-L), the air volume, and the target evaporation temperature (TeS) are determined. Then, from the calculated sensible heat load (HL-S), the total sensible heat treatment capacity of the determined latent heat treatment machine (10-L) is subtracted to calculate the remaining sensible heat load (HL-S). Next, the number of sensible heat treatment machines (10-S), air volume (Q), and target evaporation temperature (TeS) necessary for processing the remaining sensible heat load are determined. In step ST5, the air conditioner (10) that is not selected as either the latent heat treatment machine (10-L) or the sensible heat treatment machine (10-S) among the plurality of air conditioners (10) is replaced with the blower (10 -F).

<Calculation method of latent heat load>
The method for calculating the latent heat load (HL-L) in step ST4 will be described in detail.

  Latent heat load (HL-L) is currently insufficient for the latent heat treatment capacity (CL) provided by the air conditioner (10), which is a cooling machine in preliminary operation, and the target temperature (RTh) and target humidity (Rh). And the latent heat treatment capacity (insufficient latent heat treatment capacity (ΔCL)). In the preliminary operation of this example, all the air conditioners (10) are in an operating state. For this reason, the latent heat treatment capacity (CL) is the total of the latent heat treatment capacity of all the air conditioners (10).

  The latent heat treatment capacity (CL) of each air conditioner (10) can be obtained by the following equation (1).

  Latent heat treatment capacity (CL) = air volume of air conditioner [m3 / min] x (1/60) x air density [kg / m3] x latent heat of vaporization [kJ / kg] x (absolute humidity Rz1 [kg / kg]-Absolute humidity of the blown air Rz2 [kg / kg]) ... Formula (1)

  Here, the air volume is the air volume (Q) of the indoor fan (27) of the air conditioner (10) during the preliminary operation. The absolute humidity Rz1 of the indoor air is obtained from the suction temperature (Th1) and the suction humidity (Rh1) of the air conditioner (10). The absolute humidity Rz2 of the blown air can be obtained by the following equation (2).

  Absolute humidity of blown air Rz2 = Rze [kg / kg] + bypass factor BF x (Rz1 [kg / kg]-Rze [kg / kg]) ... Formula (2)

  Here, Rze is the absolute humidity of this air assuming that the blown air has been cooled to the same temperature as the evaporation temperature (Te) of the indoor heat exchanger (25) and the relative humidity has reached 100%. The bypass factor BF is the ratio of the length of the line segment a to the length of the line segment b (= a / b) in the air diagram shown in FIG. That is, in the indoor heat exchanger (25), when the air is cooled at the evaporation temperature (Te), the air at the point P1 (the state of the suction temperature Th1 and the suction humidity Rh1) is ideally the state of the point P3. It is cooled to (the same air temperature as the evaporation temperature (Te), relative humidity = 100%). On the other hand, the air at point P1 is actually cooled only to the state of point P2 (blowing temperature Th2 and blowing humidity Rh2) due to the influence of the performance of the indoor heat exchanger (25). Such performance of the indoor heat exchanger (25) can be obtained in advance as a bypass factor BF. On the contrary, by using this bypass factor BF, the air blown out from the evaporation temperature (Te), suction temperature (Th1), and suction humidity (Rh1) of the indoor heat exchanger (25) according to the above equation (2). The absolute humidity Rz1 can be obtained. In the control device (40), a bypass factor BF corresponding to the air volume of the indoor fan (27) is stored in advance in a memory or the like.

  The insufficient latent heat treatment capacity (ΔCL) can be obtained by the following equation (3).

  Insufficient latent heat treatment capacity (ΔCL) = indoor space volume V [m3] × air density [kg / m3] × latent heat of vaporization [kJ / kg] × (target absolute humidity Rzt [kg / kg]-suction absolute humidity Rz1 [kg] / kg]) × [1 / sec] ・ ・ ・ Equation (3)

  Here, the volume V [m3] may be set in advance according to the indoor space (5) to be the target of the air conditioning system (1). Further, the volume V may be easily obtained from the rated capacity (horsepower) of the air conditioner (10) of the air conditioning system (1), the rated air volume of the indoor fan (27), and the like. Moreover, in the example of (3) Formula, [1 / sec] is multiplied as what processes the latent heat load of the remaining indoor space (5) in 1 second.

  In step ST4 of FIG. 5, the latent heat load (HL-L) of the indoor space (5) is calculated as described above. Note that this latent heat load (HL-L) calculation method does not take into account changes in temperature and humidity of the indoor space (5). This is because, at the start of the determination process, the temperature and humidity of the indoor space (5) changes gradually because the temperature and humidity of the indoor air are close to the target values due to the preliminary operation described above.

<Calculation method of sensible heat load in preliminary operation judgment processing>
A method of calculating the sensible heat load (HL-S) of the indoor space (5) in the preliminary operation determination process will be described in detail.

  The sensible heat load (HL-S) is the current value of the sensible heat treatment capacity (CS) output from the air conditioner (10), which is a cooling machine in preliminary operation, and the target temperature (RTh) and target humidity (Rh). It is determined by the sum of the insufficient sensible heat treatment capacity (insufficient sensible heat treatment capacity (ΔCS)). In the preliminary operation of this example, all the air conditioners (10) are in an operating state. For this reason, the sensible heat treatment capability (CS) is the sum of the sensible heat treatment capabilities of all the air conditioners (10).

  The sensible heat treatment capacity (CS) of each air conditioner (10) can be obtained by the following equation (4).

  Sensible heat treatment capacity (CS) = Air flow rate of air conditioner [m3 / min] x (1/60) x air density [kg / m3] x specific heat at constant pressure [kJ / kg-K] x (intake air temperature Th1 [° C ]-Temperature of blown air Th2 [° C]) ··· (4)

  Here, the air volume is the air volume (Q) of the indoor fan (27) of the air conditioner (10) during the preliminary operation. The temperature Th2 of the blown air can be obtained by the following equation (5) using the above-described bypass factor BF. Here, the bypass factor BF corresponds to a / b in FIG.

  Outlet temperature Th2 = Evaporation temperature (Te) + Bypass factor BF × (Th1-Te) (5)

  The insufficient sensible heat treatment capacity (ΔCS) can be obtained by the following equation (6).

  Insufficient sensible heat treatment capacity (ΔCS) = volume of indoor space V [m3] x air density [kg / m3] x specific heat at constant pressure [kJ / kg · K] x (target temperature (RTh)-suction temperature (Th1)) x [ 1 / sec] ・ ・ ・ (6)

  Here, the volume V [m3] of the indoor space (5) may be set in advance according to the target space of the air conditioning system (1). Further, the volume V may be easily obtained from the rated capacity (horsepower) of the air conditioning system (1), the rated air volume of the indoor fan (27), and the like. Moreover, in the example of (6) Formula, [1 / sec] is multiplied as what processes the sensible heat load of the remaining indoor space (5) in 1 second.

  In step ST4 of FIG. 5, the sensible heat load (HL-S) of the indoor space (5) is calculated as described above. In the calculation of sensible heat load (HL-S) below, the temperature change of the room air is not taken into consideration. This is because, at the start of the determination process, the temperature of the room air is moderated because the temperature of the room air is approaching the target value due to the above-described preliminary operation.

<Determination flow of the latent heat treatment machine in the judgment process of preliminary operation>
In step ST4, when the latent heat load (HL-L) and sensible heat load (HL-S) of the indoor space (5) are calculated, as shown in FIG. 8, the number of latent heat treatment machines (10-L), Processing for determining the target evaporation temperature and the air volume is performed. This process is performed immediately before the actual latent-visible separation operation is started.

  In step ST11, a process is performed to determine the priority of which of the plurality of air conditioners (10) is to be preferentially set as the latent heat treatment device (10-L). In this embodiment, among the plurality of air conditioners (10), the one having a small horsepower (rated capacity) is preferentially selected as the latent heat treatment machine (10-L). Details of the determination of the priority order will be described later.

  Next, in step ST12, it is provisionally determined which air conditioner (10) is to be used as the number of latent heat treatment machines (10-L) and sensible heat treatment machines (10-S). First, when the total number N of air conditioners (10) is an even number, the number of latent heat treatment machines (10-L) and sensible heat treatment machines (10-S) are set to the same number (N / 2). When the total number N of air conditioners (10) is an odd number, the number of latent heat processors (10-L) is increased by one. That is, the number of latent heat treatment machines (10-L) is (N-1) / 2 + 1 and the number of sensible heat treatment machines (10-S) is (N-1) / 2.

  When determining the latent heat treatment machine (10-L) from the plurality of air conditioners (10), it follows the priority determined in step ST11. Therefore, for example, when tentatively determining two latent heat processors (10-L) from four air conditioners (10), two of these air conditioners (10) having a small horsepower are selected.

  Next, in step ST13, the calculated latent heat load (HL-L) is distributed to the determined latent heat treatment machine (10-L). At this time, the calculated latent heat load (HL-L) is proportionally distributed according to the horsepower (rated stress) of the air conditioner (10) serving as the latent heat treatment machine. For example, as shown in FIG. 6, the latent heat load is equivalent to 6 kW, the first latent heat treatment machine (10-L) is 2 horsepower, and the second latent heat treatment machine (10-L) is 1 horsepower. It is assumed that 4 kW of the latent heat load 6 kW is processed by the first latent heat treatment machine (10-L) and the remaining 2 kW is processed by the second latent heat treatment machine (10-L).

  Next, in step ST14, the target evaporation temperature (TeS) and the air volume (Q) are temporarily determined for the temporarily determined latent heat treatment machine (10-L). Here, the capacity for processing the distributed latent heat load (latent heat treatment capacity (CL)) is expressed by the air flow rate (Q) of the indoor fan (27) as expressed in the above-described equations (1) and (2). ), The bypass factor BF, the absolute humidity (Rz1) of the intake air, and the evaporation temperature (Te). Accordingly, the air flow rate (Q) of the indoor fan (27) is set to, for example, M tap or H tap, and the current absolute humidity (Rz1) of the intake air is used, so that the evaporation temperature (Te ). At this time, if the calculated evaporation temperature (Te) is equal to or higher than the upper limit value or lower limit value of the control range, the air volume (Q) (fan tap) so that the evaporation temperature (Te) is within the control range. Recalculate with appropriate changes.

  Next, in step ST15, the sensible heat treatment capacity of the provisionally determined latent heat treatment machine (10-L) is calculated. This sensible heat treatment capability is the sum of these sensible heat treatment capabilities (CS) when there are two or more tentatively determined latent heat treatment machines (10-L).

  In step ST16, the sensible heat treatment capacity calculated in step ST15 is compared with the sensible heat load (HL-S) of the indoor space (5) calculated in step ST4. If the sensible heat treatment capacity of the latent heat treatment machine (10-L) is smaller than the sensible heat load (HL-S), the process proceeds to step ST19 and proceeds to the decision flow of the sensible heat treatment machine (10-S) (details will be described later) To do).

  On the other hand, when the sensible heat treatment capacity of the latent heat treatment machine (10-L) is larger than the sensible heat load (HL-S), the process proceeds to step ST17. If the number of latent heat treatment machines (10-L) is one in step ST17, the process proceeds to step ST19. That is, in the determination flow of the latent heat treatment machine (10-L), at least one unit is always determined as the latent heat treatment machine (10-L).

  When there are two or more latent heat treatment machines (10-L) in step ST17, the process proceeds to step ST18. In this case, one of the latent heat treatment machines (10-L) temporarily determined so far is changed to a blower (10-F). In step ST18, among the plurality of air conditioners (10), the air conditioner (10) having the lowest priority (highest horsepower) determined in step ST11 is the blower (10-F). In step ST18, if the number of the temporarily determined latent heat treatment machines (10-L) is reduced by one, the processes of steps ST13 to ST16 are performed again in this state. In other words, with the number of latent heat treatment machines (10-L) reduced, the target evaporation temperature (TeS), air volume (Q), and sensible heat treatment capacity (CS) of the remaining latent heat treatment machines (10-L) Asked again.

  As described above, when the process finally proceeds to step ST19, the number / type of the air conditioners (10) to be the latent heat treatment machine (10-L) and the latent heat treatment machine (10 -L), the target evaporation temperature (TeS) and the airflow (Q) of the latent heat treatment machine (10-L) are determined (determined).

<Determination flow of sensible heat treatment machine in judgment processing for preliminary operation>
After the number of latent heat treatment machines (10-L), the target evaporation temperature, and the air volume are determined, the flow proceeds to the determination flow of the sensible heat treatment machine (10-S) shown in FIG. In this flow, processing for determining the number of sensible heat treatment machines (10-S), target evaporation temperature, and air volume is performed. This process is performed immediately before the actual latent-visible separation operation is started.

  In step ST21, the remaining sensible heat obtained by subtracting the sensible heat treatment capacity of the latent heat treatment machine (10-L) obtained in step ST15 from the sensible heat load (HL-S) of the indoor space (5) calculated in step ST4. Heat load (HL-S ') is required. As illustrated in FIG. 6, the sensible heat load (HL-S) is equivalent to 8 kW, and the sensible heat treatment capacity of the first latent heat treatment machine (10-L) and the second latent heat treatment machine (10-L) Assume that the total is 5 kW. In this case, the remaining sensible heat load (HL-S ') which cannot be processed by these latent heat treatment machines (10-L) is 3 kW (= 8 kW-5 kW).

  Next, in Step ST22, the remaining sensible heat load (HL-S) is transferred to the remaining air conditioner (10) other than the latent heat treatment device (10-L) and the blower (10-F) (that is, the sensible heat treatment device ( 10-S)). At this time, the remaining sensible heat load (HL-S ') is proportionally distributed according to the horsepower (rated capacity) of the air conditioner (10) that is the sensible heat treatment machine.

  Next, in step ST23, the target evaporation temperature (TeS) and the air volume (Q) are provisionally determined for the provisionally determined sensible heat treatment machine (10-S). Here, the capacity for treating the distributed sensible heat load (sensible heat treatment capacity) is expressed by the above-mentioned equations (4) and (5), the air volume (Q) of the indoor fan (27), It is a function of the bypass factor BF, the suction temperature (Th1), and the evaporation temperature (Te). Therefore, by setting the air flow rate (Q) of the indoor fan (27) to M tap or H tap, for example, and using the current suction temperature (Th1), the evaporation temperature (Te) for processing the distributed sensible heat load is set. Can be sought. At this time, if the evaporation temperature (Te) is equal to or higher than the upper limit value or lower limit value of the control range, the air volume (Q) is appropriately changed so that the evaporation temperature (Te) is within the control range. And recalculate.

  Next, in step ST24, if the target evaporation temperatures (TeS) of all the sensible heat treatment machines (10-S) do not become lower than the upper limit of the control range of the evaporation temperature, the process proceeds to step ST25, where one sensible heat treatment machine Change (10-S) to blower (10-F). Next, in step ST26, when the number of sensible heat treatment machines (10-S) is 0, the process proceeds to step ST27, and otherwise, the process proceeds to step ST22. In step ST26, if the number of the tentatively determined sensible heat treatment machines (10-S) is reduced by one, the processing of steps ST22 to ST24 is performed again in this state. That is, with the number of sensible heat treatment machines (10-S) reduced by one, the target evaporation temperature (TeS) and air volume (Q) of the remaining sensible heat treatment machines (10-S) are obtained again.

  As described above, when the process finally proceeds to step ST27, the number / type of the air conditioners (10) to be the sensible heat treatment machine (10-S) and the sensible heat treatment machine (10 -S), the target evaporation temperature (TeS) and the air volume (Q) of the sensible heat treatment machine (10-S) are determined (determined).

<Control at the start of latent-splitting separation operation>
When the latent microscope separation operation is started, the plurality of air conditioners (10) are controlled to reflect the contents determined in the preliminary operation. In other words, each air conditioner (10) is operated with the type determined in the preliminary operation (any of latent heat treatment machine (10-L), sensible heat treatment machine (10-S), and blower (10-F)). Is done. The latent heat treatment machine (10-L) is controlled with the air volume (Q) and the target evaporation temperature (TeS) determined in the preliminary operation as target values. The sensible heat treatment machine (10-S) is controlled with the air volume (Q) and the target evaporation temperature (TeS) determined in the preliminary operation as target values. That is, at the start of the latent and sensible separation operation, each air conditioner (10) is operated with the capacity corresponding to the current latent heat load and the sensible heat load.

<Updating operation parameters during latent-splitting separation operation>
The submerged heat treatment machine (10-L) and the sensible heat treatment machine (10-S) during the substantial microscope separation operation are strictly controlled by the local controller (41) of the existing unit. )) Is controlled. That is, the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) basically try to perform the same cooling cycle as the cooling operation. On the other hand, as described above, the main control unit (45) replaces the control parameters of the local controller (41) every update time ΔT. Specifically, the target evaporation temperature (TeS) corresponding to the latent heat treatment machine (10-L) is updated within a predetermined control range so that the latent heat treatment machine (10-L) can cool the air below the dew point temperature. The The target evaporation temperature (TeS) corresponding to the sensible heat treatment machine (10-S) is updated in a predetermined control range so that the sensible heat treatment machine (10-S) can cool the air at a temperature higher than the dew point temperature. The control range of the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is smaller than the control range of the target evaporation temperature (TeS) of the sensible heat treatment machine (10-S).

  Thus, for the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S), which are cooling units, the target evaporation temperature (TeS) is forcibly rewritten by the signal from the main control unit (45). Thereby, the function of the latent separation operation can be added to the air conditioning system (1). The main controller (45) of the additional unit also updates the air volume (Q) of the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) in the arithmetic processing of the local controller (41).

  The latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) are basically controlled in the same manner as the air conditioner. In -S), thermo-off / thermo-on control is performed in the same manner as in the cooling operation described above.

<Outline of control during latent-splitting separation operation>
After the latent microscope separation operation is started, control is performed to change the air volume (Q), target evaporation temperature (TeS), and number of each air conditioner (10) at predetermined update intervals ΔT (for example, 20 seconds). Do. Such control includes the air flow control of the latent heat treatment machine (10-L), the evaporation temperature control of the latent heat treatment machine (10-L), the air flow control of the sensible heat treatment machine (10-S), and the sensible heat treatment machine (10-S). ) Evaporation temperature control and number change control.

<Air volume control of submerged heat treatment machine>
In the latent heat treatment machine (10-L) during the latent microscope separation operation, the air volume control shown in FIG. 10 is first performed with priority. In the air volume control, the air volume (Q) and the target evaporation temperature (TeS) of the indoor air of the air conditioner (10) are changed while maintaining the latent heat treatment capacity of the latent heat processor (10-L).

  Specifically, in step ST31, the suction temperature (Th1) of the latent heat treatment machine (10-L) is lower than a predetermined value (for example, the target temperature (RTh)), and the room of the latent heat treatment machine (10-L) When the fan tap of the fan (27) is the M or H tap, the process proceeds to steps ST32 to ST35. That is, when the condition of step ST31 is satisfied, the suction temperature (Th1) may be equal to or lower than the thermo-off temperature (Thoff), and the latent heat treatment machine (10-L) may be thermo-off. Therefore, when the condition of Step ST31 is satisfied, the process proceeds to Steps ST32 to ST35, and control for reducing the air volume of the latent heat treatment machine (10-L) is performed.

  In step ST32, the latent heat treatment capacity (CL) of the target latent heat treatment machine (10-L) is calculated. This latent heat treatment capability (CL) is determined by the above equations (1) and (2). Next, in step ST33, the evaporation temperature (target evaporation) that can maintain the calculated latent heat treatment capacity (CL) even if the current air flow (Q) of the latent heat treatment machine (10-L) is reduced to the predetermined air flow (Q '). Temperature (TeS)) is calculated. Specifically, this target evaporation temperature (TeS) is the latent heat treatment capacity (CL), suction temperature (Th1), suction humidity (Rh1) of the latent heat treatment machine (10-L) in the above formulas (1) and (2). ), The changed air volume (Q ′), and the bypass factor BF corresponding to the changed air volume (Q ′). The target evaporation temperature (TeS) calculated here is lower than the current target evaporation temperature (TeS).

  Next, in step ST34, the air volume of the latent heat treatment machine (10-L) is reduced to the air volume (Q '). Specifically, the fan tap of the indoor fan (27) is reduced by one tap. Next, in step ST35, the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is changed to the value calculated in step ST33. That is, in step ST35, the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is reduced.

  As described above, when the air volume of the latent heat treatment machine (10-L) is reduced and the target evaporation temperature (TeS) is reduced, as shown in FIG. The sensible heat treatment capacity (CS) of this latent heat treatment machine (10-L) can be suppressed while maintaining CL). When the air volume of the latent heat processor (10-L) is reduced, the proportion of air that bypasses the indoor heat exchanger (25) decreases, and the contact time between the air and the indoor heat exchanger (25) becomes longer. For this reason, the amount of moisture condensed on the surface of the indoor heat exchanger (25) increases, and the SHF (sensible heat ratio) of the latent heat treatment machine (10-L) decreases. Therefore, the latent heat load can be sufficiently treated while avoiding the latent heat treatment machine (10-L) from reaching the thermo-off state.

  If the condition in step ST31 is not satisfied, the process proceeds to step ST36. In step ST36, the suction temperature (Th1) of the latent heat treatment machine (10-L) is higher than a predetermined value (a value obtained by adding Δt1 (for example, 1 ° C.) to the target temperature (RTh)) and the latent heat treatment machine (10-L) If the fan tap of -L) is equal to or less than the L tap and the target evaporation temperature (TeS) is equal to or less than the lower limit of the control range, the process proceeds to steps ST37 to ST40. That is, when the condition of step ST36 is satisfied, the indoor temperature may be too high and comfort may be impaired. Therefore, when this condition is satisfied, the process proceeds to steps ST37 to ST40, and control for increasing the air volume of the latent heat treatment machine (10-L) is performed.

  In step ST37, the latent heat treatment capacity (CL) of the target latent heat treatment machine (10-L) is obtained by the above equations (1) and (2). Next, in step ST38, the evaporation temperature (target evaporation) that can maintain the calculated latent heat treatment capacity (CL) even if the air volume (Q) of the current latent heat treatment machine (10-L) is increased to a predetermined air volume (Q '). Temperature (TeS)) is calculated. Specifically, the target evaporation temperature (TeS) is the latent heat treatment capacity (CL), suction temperature (Th1), and suction humidity (Rh1) of the latent heat treatment machine (10-L) in the above formulas (1) and (2). It is calculated by substituting a bypass factor BF corresponding to the changed air volume (Q ′) and the changed air volume (Q ′). The target evaporation temperature (TeS) calculated here is higher than the current target evaporation temperature (TeS).

  Next, in step ST39, the air volume (Q) of the latent heat treatment machine (10-L) is increased to the air volume (Q '). Specifically, the fan tap of the indoor fan (27) is increased by one tap. Next, in step ST40, the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is changed to the value calculated in step ST38. That is, in step ST38, the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is increased.

  As described above, when the air volume (Q) of the latent heat treatment machine (10-L) is increased and the target evaporation temperature (TeS) is increased, the latent heat of the latent heat treatment machine (10-L) is increased as shown in FIG. The sensible heat treatment capacity (CS) can be increased while maintaining the processing capacity (CL). When the air volume (Q) of the latent heat treatment machine (10-L) is increased, the SHF (sensible heat ratio) of the latent heat treatment machine (10-L) is increased. For this reason, the indoor temperature can be quickly brought close to the target temperature (RTh), and dehumidification can be continued to improve indoor comfort. In addition, since the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is increased, the power consumption of the air conditioner (10) (strictly, the compressor (21)) can be suppressed.

  As described above, in controlling the airflow of the latent heat treatment machine (10-L), the latent heat treatment capacity of the latent heat treatment machine (10-L) is maintained, so that the latent heat load to be processed by another air conditioner (10) is reduced. No effect. For this reason, other air conditioners (10) may be thermo-offed or the type of other air conditioners (10) may be switched due to changes in the latent heat treatment capacity of the latent heat treatment machine (10-L). Can be suppressed.

<Evaporation temperature control of latent heat treatment machine>
After the air volume control of the latent heat treatment machine (10-L) is performed, the evaporation temperature control shown in FIG. 13 is performed. In this evaporation temperature control, the target evaporation is basically performed so that the absolute humidity of the suction air (suction absolute humidity (Rz1)) of the latent heat treatment machine (10-L) approaches the target value (target absolute humidity (Rzt)). Temperature (TeS) is controlled, where suction absolute humidity (Rz1) is obtained from suction temperature (Th1) and suction humidity (Rh1) .Target absolute humidity (Rzt) is the target suction temperature (Th1) And the target suction humidity (Rh1).

  FIG. 13 is an example of the evaporation temperature control of the latent heat treatment machine (10-L). In step ST41, when the condition indicating that the evaporation temperature (Te) of the latent heat treatment machine (10-L) has not converged, the process proceeds to step ST45, and the target evaporation temperature (TeS) is maintained. . If the suction temperature (Th1) of the latent heat treatment machine (10-L) is lower than a predetermined value (a value obtained by subtracting a predetermined temperature Δt2 (for example, 0.5 ° C.) from the target temperature (RTh)) in step ST42, step ST46 Migrate to That is, when the condition where the suction temperature (Th1) is close to the thermo-off temperature (Thoff) is satisfied, the process proceeds to step ST46, and the target evaporation temperature (TeS) is increased. In step ST43, when the suction absolute humidity (Rz1) of the latent heat processor (10-L) has converged to the target value, the target evaporation temperature (TeS) is maintained. If none of the conditions in steps ST41 to ST43 is satisfied, the process proceeds to step ST44, and the target evaporation temperature (TeS) is adjusted so that the suction absolute humidity (Rz1) approaches the target value.

<Air flow control of sensible heat treatment machine>
In the sensible heat treatment machine (10-S) during the latent sensible separation operation, the air volume control shown in FIG. In the air volume control, control is performed to change the air volume (Q) and target evaporation temperature (TeS) of the indoor air of the air conditioner (10) while maintaining the sensible heat treatment capability of the sensible heat treatment machine (10-S).

  Specifically, in step ST51, the suction temperature (Th1) of the sensible heat treatment machine (10-S) is lower than a predetermined value (for example, the target temperature (RTh), and the fan tap of the sensible heat treatment machine (10-S) Is H tap, the process proceeds to steps ST52 to ST55, that is, if the condition of step ST51 is satisfied, the suction temperature (Th1) reaches the thermo-off temperature (Thoff) or lower and the sensible heat treatment machine (10-S) thermo-offs. Therefore, when this condition is satisfied, the process proceeds to steps ST52 to ST55, and control for reducing the air volume of the sensible heat treatment machine (10-S) is performed.

  Specifically, in step ST52, the sensible heat treatment capacity (CS) of the target sensible heat treatment machine (10-S) is calculated. This sensible heat treatment ability (CS) is obtained by the above equations (4) and (5). Next, in step ST53, an evaporation temperature (target evaporation temperature (TeS) that can maintain the calculated sensible heat treatment capacity (CS) even if the current sensible heat treatment machine (10-S) air volume is reduced to a predetermined air volume (Q '). )) Is calculated. Specifically, the target evaporation temperature (TeS) is the sensible heat treatment capacity (CS), suction temperature (Th1), suction humidity (Rh1) of the sensible heat treatment machine (10-S) in the above equations (4) and (5). It is calculated by substituting a bypass factor BF corresponding to the changed air volume (Q ′) and the changed air volume (Q ′). The target evaporation temperature (TeS) calculated here is lower than the current target evaporation temperature (TeS).

  Next, in step ST54, the air volume (Q) of the sensible heat treatment machine (10-S) is reduced to the air volume (Q '). Specifically, the fan tap of the indoor fan (27) is reduced by one tap. Next, in step ST55, the target evaporation temperature (TeS) of the sensible heat treatment machine (10-S) is changed to the value calculated in step ST53. That is, in step ST55, the target evaporation temperature (TeS) of the sensible heat treatment machine (10-S) is lowered.

  Here, if the air volume of the sensible heat treatment machine (10-S) is simply reduced and the target evaporation temperature (TeS) is maintained, the suction temperature (Th1) of the sensible heat treatment machine (10-S) is reduced as the air volume decreases. It can rise sharply. In this case, there is a possibility that the target evaporation temperature (TeS) is controlled so as to rapidly decrease by the evaporation temperature control described later in detail. In this case, the suction temperature (Th1) may reach the thermo-off temperature (Thoff) due to so-called undershoot. On the other hand, when the air volume of the sensible heat treatment machine (10-S) is reduced and the target evaporation temperature (TeS) is lowered as described above, the suction temperature (Th1) of the sensible heat treatment machine (10-S) rapidly increases. It can suppress rising. Therefore, it can be avoided that the sensible heat treatment machine (10-S) reaches the thermo-off state due to the undershoot as described above.

  If the target evaporation temperature (TeS) is reduced by this control, the suction temperature (Th1) tends to be low. Further, a sufficient control margin is ensured between the actual evaporation temperature (Te) and the upper limit value of the control range of the target evaporation temperature (TeS). Accordingly, in the subsequent evaporation temperature control, the target evaporation temperature (TeS) gradually increases.

  If the condition in step ST51 is not satisfied, the process moves to step ST56. In step ST56, the suction temperature (Th1) of the sensible heat treatment machine (10-S) is higher than a predetermined value (a value obtained by adding a predetermined value Δt3 (for example, 1 ° C.) to the target temperature (RTh)), and If the fan tap of (10-S) is equal to or less than the M tap and the target evaporation temperature (TeS) is equal to or less than the lower limit of the control range, the process proceeds to steps ST57 to ST60. That is, when the condition of step ST56 is satisfied, the indoor temperature may be too high and comfort may be impaired. Therefore, when this condition is satisfied, the process proceeds to steps ST57 to ST60, and control for increasing the air volume of the sensible heat treatment machine (10-S) is performed.

  Specifically, in step ST57, the sensible heat treatment capacity (CS) of the target sensible heat treatment machine (10-S) is obtained by the above equations (4) and (5). Next, in step ST58, the calculated sensible heat treatment is performed even if the current air flow rate (Q) of the sensible heat treatment machine (10-S) is increased to a predetermined air flow rate (Q ') based on the above equations (4) and (5). The evaporation temperature (Te) (target evaporation temperature (TeS)) that can maintain the capacity (CS) is calculated. Specifically, the target evaporation temperature (TeS) is the sensible heat treatment capacity (CS), suction temperature (Th1), suction humidity (Rh1) of the sensible heat treatment machine (10-S) in the above equations (4) and (5). It is calculated by substituting a bypass factor BF corresponding to the changed air volume (Q ′) and the changed air volume (Q ′). The target evaporation temperature (TeS) calculated here is higher than the current target evaporation temperature (TeS).

  Next, in step ST59, the air volume (Q) of the latent heat treatment machine (10-L) is increased to the air volume (Q '). Specifically, the fan tap of the indoor fan (27) is increased by one tap. Next, in step ST60, the target evaporation temperature (TeS) of the sensible heat treatment machine (10-S) is changed to the value calculated in step ST58. That is, in step ST60, the target evaporation temperature (TeS) of the sensible heat treatment machine (10-S) is increased.

  As described above, when the air volume of the sensible heat treatment machine (10-S) is increased and the target evaporation temperature (TeS) is increased, while maintaining the sensible heat treatment capacity (CS) of the sensible heat treatment machine (10-S), The target evaporation temperature (TeS) can be increased.

  Here, when the air volume of the sensible heat treatment machine (10-S) is simply increased and the target evaporation temperature (TeS) is maintained, the suction temperature (Th1) of the sensible heat treatment machine (10-S) is increased as the air volume increases. , The suction temperature (Th1) may reach the thermo-off temperature (Thoff). On the other hand, when the air volume of the sensible heat treatment machine (10-S) is increased and the target evaporation temperature (TeS) is increased as described above, the suction temperature (Th1) of the sensible heat treatment machine (10-S) is greatly reduced. Can be suppressed. As a result, the sensible heat treatment machine (10-S) can be prevented from reaching the thermo-off state. Moreover, the power consumption of an air conditioner (10) can be suppressed because the target evaporation temperature (TeS) of a sensible heat treatment machine (10-S) becomes high.

  When the target evaporation temperature (TeS) is increased by this control, the suction temperature (Th1) tends to increase. In addition, a sufficient control allowance is ensured between the actual evaporation temperature (Te) and the lower limit value of the control range of the target evaporation temperature (TeS). Accordingly, in the subsequent evaporation temperature control, the target evaporation temperature (TeS) gradually decreases.

  As described above, in the air flow control of the sensible heat treatment machine (10-S), since the sensible heat treatment capacity (CS) of the sensible heat treatment machine (10-S) is maintained, the air is controlled by another air conditioner (10). There is no effect on the sensible heat load. For this reason, the other air conditioner (10) is thermo-offed due to the change in the sensible heat treatment capacity (CS) of the sensible heat treatment machine (10-S), or the type of the other air conditioner (10) is switched. Can be suppressed.

<Evaporation temperature control of sensible heat treatment machine>
After the air volume control of the sensible heat treatment machine (10-S) is performed, the evaporation temperature control of the sensible heat treatment machine (10-S) shown in FIG. 15 is performed. In this evaporation temperature control, the target evaporation temperature (TeS) is basically controlled so that the suction temperature (Th1) of the sensible heat treatment machine (10-S) approaches the target temperature (RTh).

  FIG. 15 is an example of the evaporation temperature control of the sensible heat treatment machine (10-S). In step ST61, when the condition that the evaporation temperature (Te) of the latent heat treatment machine (10-L) has not converged, or the condition that the suction temperature (Th1) has converged, the process proceeds to step ST63. The target evaporation temperature (TeS) is maintained. When the condition of step ST61 is not satisfied, the process proceeds to step ST62, and the target evaporation temperature (TeS) is adjusted so that the suction temperature (Th1) approaches the target temperature (RTh).

<Number change control>
After the air volume control and evaporation temperature control in the latent heat treatment machine (10-L) and the air volume control and evaporation temperature control in the sensible heat treatment machine (10-S) are completed, the type and number of each air conditioner (10) The number change control for changing the value is performed.

  That is, in the latent and sensible separation operation, the control of the evaporation temperature and the air flow of the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) are performed with priority, and even if these controls are performed, the situation is not improved. In this case, the number change control is performed.

  As shown in FIG. 16, in the number change control, control for changing the sensible heat treatment machine (10-S) to the latent heat treatment machine (10-L) (step ST82), and the sensible heat treatment machine (10-S) for the blower (10-S). -F) (Step ST83), Blower (10-F) to latent heat treatment machine (10-L) (Step ST84), Latent heat treatment machine (10-L) to sensible heat treatment machine (10 -S) (step ST85) and control (step ST86) of changing the blower (10-F) to the sensible heat treatment machine (10-S).

  In the number change control, control for changing the latent heat treatment machine (10-L) to the blower (10-F) is not performed. Condensed water tends to adhere to the surface of the indoor heat exchanger (25) of the latent heat treatment machine (10-L). For this reason, when the latent heat treatment machine (10-L) is changed to the blower (10-F), the water adhering to the surface of the indoor heat exchanger (25) of the blower (10-F) evaporates, and the indoor space This is because (5) may be released.

  As shown in FIG. 16, the number of air conditioners (10) is changed one by one, and the types of two or more air conditioners (10) are not changed at the same time. Thereby, it can suppress that the temperature / humidity in a room changes rapidly.

  Change any one of the multiple sensible heat treatment machines (10-S) to a latent heat treatment machine (10-L), or change multiple blowers (10-F) to a latent heat treatment machine (10-L) In this case, it follows the priority described above (step ST11 in FIG. 8). In other words, in the present embodiment, among the plurality of air conditioners (10), the one having a small horsepower (rated capacity) is preferentially selected as the latent heat treatment machine (10-L). Details of the determination of the priority order will be described later.

  The determination in step ST72 shown in FIG. 16 is based on the condition a1 indicating that the indoor humidity is higher than the predetermined value, and when the evaporation temperature (Te) of the latent heat treatment machine (10-L) is equal to or lower than the predetermined value (lower limit) of the control range. Condition a2 indicating that there is a condition, condition a3 indicating that the suction temperature (Th1) is lower than a predetermined value (close to the thermo-off temperature (Thoff)), and condition a4 indicating that there is at least one sensible heat treatment machine (10-S). It is performed based on.

  More strictly, the condition a1 is that the difference ΔRz (Rh1−Rh) between the suction humidity (Rh1) of the latent heat treatment machine (10-L) and the target humidity (Rh) is larger than a predetermined value. The condition a2 is that the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is equal to or lower than a predetermined value (lower limit value). The condition a3 is that a difference ΔTh1 (Th1-RTh) between the suction temperature (Th1) of the latent heat treatment machine (10-L) and the target temperature (RTh) is smaller than a predetermined value Δt3.

  Here, ΔRz of the condition a1 may be a difference between the suction humidity (Rh1) of the air conditioner (10) in the operating state and the target humidity (Rh), and is not necessarily the suction humidity of the latent heat treatment machine (10-L). It does not have to be the difference between (Rh1) and the target humidity (Rh). Specifically, for example, the difference ΔRz between the suction humidity (Rh1) of the sensible heat treatment machine (10-S) and the target humidity (Rh) may be used, and the suction humidity (Rh1) of the blower (10-F) You may use difference (DELTA) Rz with target humidity (Rh). When there are two or more latent heat treatment machines (10-L), the largest or specific one of ΔRz of these latent heat treatment machines (10-L) can be used for the determination of the condition a1. When there are two or more air conditioners (10) in operation, the largest or specific one of ΔRz of these air conditioners (10) may be used for the determination of the condition a1.

  The predetermined value of the condition a2 does not necessarily have to be the lower limit of the control range of the evaporation temperature (Te).

  Δt3 of the condition a3 is set to, for example, −0.5 ° C. Δt3 is a value smaller than 0 and larger than the difference (Thoff−RTh = −1.0 ° C.) between the thermo-off temperature (Thoff) and the target temperature (RTh).

  In this example, when the condition a1 is satisfied, and at least one of the conditions a2 and a3 is satisfied, and the condition a4 is satisfied, the process proceeds to Step ST82, and one sensible heat treatment machine (10-S) is turned on. Changed to processing machine (10-L).

  In step ST72, the conditions a1 and a2 are at least satisfied when the indoor latent heat load is high, but the evaporation temperature (Te) of the latent heat treatment machine (10-L) cannot be further reduced. Therefore, in such a situation, one sensible heat treatment machine (10-S) is switched to the latent heat treatment machine (10-L). Thereby, the latent heat treatment capability of the entire air conditioning system (1) can be increased, and the suction absolute humidity (Rz1) can be quickly converged to the target absolute humidity (Rzt).

  In step ST72, for example, at least the above conditions a1 and a3 are satisfied because the indoor latent heat load is high, but if the evaporation temperature (Te) of the latent heat treatment machine (10-L) is excessively lowered, the latent heat treatment machine (10-L ) May be at risk of thermo-off. Therefore, in such a situation, one sensible heat treatment machine (10-S) is switched to the latent heat treatment machine (10-L). As a result, it is possible to increase the latent heat treatment capacity of the air conditioning system (1) as a whole while avoiding the thermo-off of the latent heat treatment machine (10-L).

  The condition a3 is also satisfied when the suction temperature (Th1) of the latent heat treatment machine (10-L) becomes equal to or lower than the thermo-off temperature (Thoff). In this case, the latent heat treatment machine (10-L) is thermo-off, but also in this case, for example, when the conditions a1 and a4 are satisfied, the process proceeds to step ST82 and the sensible heat treatment machine (10-S) is moved to the latent heat treatment machine. Changed to (10-L).

  The determination in step ST73 is performed based on a condition b1 indicating that the suction temperature (Th1) of the sensible heat treatment machine (10-S) is lower than a predetermined value (close to the thermo-off temperature (Thoff)).

  More strictly, the condition b1 is that the difference ΔTh1 (Th1-RTh) between the suction temperature (Th1) of the sensible heat treatment machine (10-S) and the target temperature (RTh) is smaller than a predetermined value Δt4.

  Δt4 of the condition b1 is set to, for example, −0.5 ° C. Δt4 is a value smaller than 0 and larger than the difference (Thoff−RTh = −1.0 ° C.) between the thermo-off temperature (Thoff) and the target temperature (RTh).

  In this example, when the condition b1 is satisfied, the process proceeds to step ST83, and one sensible heat treatment machine (10-S) is changed to a blower (10-F).

  In step ST73, the condition b1 is satisfied when there is a risk that the sensible heat treatment machine (10-S) will be turned off. Therefore, in such a situation, one sensible heat treatment machine (10-S) is switched to the blower (10-F). The air volume (Q) of the blower (10-F) is larger than the air volume of the cooler in the thermo-off state. For this reason, the air of indoor space (5) can fully be stirred, and the nonuniformity of the temperature and humidity of indoor space (5) can be suppressed.

  The condition b1 is also satisfied when the suction temperature (Th1) of the sensible heat treatment machine (10-S) becomes equal to or lower than the thermo-off temperature (Thoff). In this case, the sensible heat treatment machine (10-S) is thermo-off, but also in this case, the process proceeds to step T83 and is changed to the blower (10-F).

  In step ST73, a determination of condition b2 that the number of sensible heat treatment machines (10-S) is one or more may be added.

  The determination in step ST74 indicates that the condition c1 indicating that the indoor humidity is higher than the predetermined value, and that the evaporation temperature (Te) of the latent heat treatment machine (10-L) is equal to or lower than the predetermined value (lower limit) of the control range. This is performed based on the condition c2 and the condition c3 indicating that the suction temperature (Th1) of the blower (10-F) is higher than a predetermined value.

  More strictly, the condition c1 is that the difference ΔRz (Rh1−Rh) between the suction humidity (Rh1) of the latent heat treatment machine (10-L) and the target humidity (Rh) is larger than a predetermined value. Condition c2 is that the target evaporation temperature (TeS) of the latent heat treatment machine (10-L) is equal to or lower than a predetermined value (lower limit value). Condition c3 is that a difference ΔTh1 (Th1-RTh) between the suction temperature (Th1) of the blower (10-F) and the target temperature (RTh) is larger than a predetermined value Δt5.

  Here, ΔRz of the condition c1 may be a difference between the suction humidity (Rh1) of the air conditioner (10) in the operating state and the target humidity (Rh), and is not necessarily the suction humidity of the latent heat treatment machine (10-L). It does not have to be the difference between (Rh1) and the target humidity (Rh). Specifically, for example, the difference ΔRz between the suction humidity (Rh1) of the sensible heat treatment machine (10-S) and the target humidity (Rh) may be used, and the suction humidity (Rh1) of the blower (10-F) You may use difference (DELTA) Rz with target humidity (Rh). When there are two or more latent heat treatment machines (10-L), the largest or specific one of ΔRz of these latent heat treatment machines (10-L) can be used for the determination of the condition c1. When there are two or more air conditioners (10) in the operating state, the largest or specific one of ΔRz of these air conditioners (10) can be used for the determination of the condition c1.

  The predetermined value of the condition c2 does not necessarily have to be the lower limit of the control range of the evaporation temperature (Te).

  Δt5 of the condition c3 is set to, for example, -0.5 ° C. Δt5 is a value smaller than 0 and larger than a difference (Thoff−RTh = −1.0 ° C.) between the thermo-off temperature (Thoff) and the target temperature (RTh).

  In this example, when all of the conditions c1, c2, and c3 are satisfied, the process proceeds to step ST84, and one blower (10-F) is changed to a latent heat treatment machine (10-L).

  In Step ST74, all of the conditions c1, c2, and c3 are satisfied because the indoor latent heat load is high, but the evaporation temperature (Te) of the latent heat treatment machine (10-L) cannot be further reduced, And the suction temperature (Th1) of the blower (10-F) is high. Therefore, under such circumstances, one blower (10-F) is changed to a latent heat treatment machine (10-L). Thereby, the latent heat treatment capacity of the entire air conditioning system (1) can be increased, and the suction absolute humidity (Rz1) can be quickly converged to the target absolute humidity (Rzt).

  In step ST74, a determination of condition c4 that the number of blowers (10-F) is one or more may be added.

  The determination in step ST75 includes the condition d1 indicating that the indoor humidity is lower than a predetermined value, the condition d2 indicating that the suction temperature (Th1) of the latent heat treatment machine (10-L) is higher than a predetermined value, the latent heat treatment machine ( Condition d3 indicating that the evaporation temperature (Te) of (10-L) is equal to or higher than a predetermined value (upper limit) of the control range, and condition d4 indicating that the number of latent heat treatment machines (10-L) is two or more. It is performed based on.

  More strictly, the condition d1 is that the difference ΔRz (Rh1−Rh) between the suction humidity (Rh1) of the latent heat treatment machine (10-L) and the target humidity (Rh) is smaller than a predetermined value. The condition d2 is that the difference ΔTh1 (Th1-RTh) between the suction temperature (Th1) of the latent heat treatment machine (10-L) and the target temperature (RTh) is larger than a predetermined value Δt6. Condition d3 is that the target evaporation temperature (TeS) is equal to or higher than a predetermined value (upper limit value).

  ΔRz of the condition d1 may be a difference between the suction humidity (Rh1) of the air conditioner (10) in the operating state and the target humidity (Rh), and is not necessarily the suction humidity (Rh1) of the latent heat treatment machine (10-L). It does not need to be the difference between the target humidity and the target humidity (Rh). Specifically, for example, the difference ΔRz between the suction humidity (Rh1) of the sensible heat treatment machine (10-S) and the target humidity (Rh) may be used, and the suction humidity (Rh1) of the blower (10-F) You may use difference (DELTA) Rz with target humidity (Rh). When there are two or more latent heat treatment machines (10-L), the largest or specific one of ΔRz of these latent heat treatment machines (10-L) can be used for the determination of the condition d1. When there are two or more air conditioners (10) in operation, the largest or specific one of ΔRz of these air conditioners (10) can be used for the determination of the condition d1.

  Δt6 of the condition d2 is set to, for example, -0.5 ° C. Δt6 is a value smaller than 0 and larger than the difference W (Thoff−RTh = −1.0 ° C.) between the thermo-off temperature (Thoff) and the target temperature (RTh).

  The predetermined value of the condition d3 is not necessarily the upper limit of the control range of the evaporation temperature (Te).

  In this example, when all of the conditions d1, condition d2, condition d3, and condition d4 are satisfied, the process proceeds to step ST85, and one latent heat treatment machine (10-L) is replaced with the sensible heat treatment machine (10-S). Is changed to

  In step ST75, the conditions d1, d2, and d3 are at least satisfied because the indoor latent heat load is low, the suction temperature (Th1) of the latent heat treatment machine (10-L) is slightly higher, and the latent heat treatment machine (10-L) This is a situation in which the evaporation temperature (Te) of can not be increased any more. Therefore, in such a situation, one latent heat treatment machine (10-L) is changed to a sensible heat treatment machine (10-S). Thereby, SHF of the whole air conditioning system (1) increases, and a sensible heat load can be processed preferentially.

  The determination in step ST76 is performed based on a condition e1 indicating that the suction temperature (Th1) of the blower (10-F) is higher than a predetermined value.

  More strictly, the condition e1 is that the difference ΔTh1 (Th1-RTh) between the suction temperature (Th1) of the blower (10-F) and the target temperature (RTh) is larger than a predetermined value Δt7.

  Δt7 of the condition e1 is set to, for example, + 0.5 ° C. Δt7 is a value greater than zero. In this example, when the condition e1 is satisfied, the process proceeds to step ST86, and one blower (10-F) is changed to a sensible heat treatment machine (10-S).

  In step ST76, the condition e1 is satisfied when the suction temperature (Th1) of the blower (10-F) is high. Therefore, under such circumstances, one blower (10-F) is changed to a sensible heat treatment machine (10-S). As a result, the sensible heat treatment capacity of the entire air conditioning system (1) can be increased.

  In step ST76, a determination of condition e2 that the number of blowers (10-F) is one or more may be added.

  In the number change control, after the number of any of the air conditioners (10) is changed in steps ST81 to ST86, the change of the next number (type) is prohibited until a predetermined time C elapses (step ST81 to S86). ST71). The predetermined time C is set to the above-described update interval ΔT × n (n is the number of updates, for example, n ≧ 2). That is, after the number of air conditioners (10) is changed, when the number of communication / control for updating the control parameter is less than n, the process proceeds to step ST81. In this case, changing the number of air conditioners (10) is prohibited. On the other hand, after the number of air conditioners (10) is changed, if the number of times of communication / control for updating control parameters reaches n, the process proceeds to steps ST72 to ST72. In this case, the change of the number of each air conditioner (10) is allowed again. In this way, by limiting the change in the number and type of air conditioners (10), it is possible to suppress a sudden change in indoor temperature and humidity.

<Determining the priority of submersible heat treatment machines>
In the preliminary operation determination process and the number change control described above, the latent heat treatment machine (10-L) is selected in accordance with the determined priority order. This priority determination method (selection process) will be described in detail with reference to FIG.

  In the selection process, among the plurality of air conditioners (10), the air conditioner (10) having a small index indicating the airflow of the indoor air is selected as the latent heat treatment machine (10-L). In this example, the horsepower (rated capacity) of the air conditioner (10) is used as an index indicating the air volume of room air. Generally, there is a correlation between the air volume of the indoor fan (27) and the horsepower of the air conditioner (10), and the horsepower increases as the air volume increases. For this reason, the horsepower of the air conditioner (10) is an index indicating the air volume of the room air. As an index indicating the air volume of indoor air, the rated air volume, minimum air volume, maximum air volume, etc. of the indoor fan (27) may be used.

  In the example of the air conditioning system (1) shown in FIG. 17, there are five air conditioners (10) from NO.1 to NO.5. The horsepower of NO.1 air conditioner (10) is 2.0, the horsepower of NO.2 and NO.3 air conditioner (10) is 2.5, the horsepower of NO4 and NO.5 is 3.0. In the selection process of this example, among these air conditioners (10), the priority of the air conditioner (10) with the smallest horsepower (index indicating air volume) is the highest (1st place). ).

  In the example of FIG. 17, the air conditioner (10) having the second highest horsepower next to the air conditioner (10) of No. 1 is the air conditioner (10) of NO. The horsepower of the air conditioners (10) of NO.2 and NO.3 is 2.5 and equal to each other. In the priority selection process, if the horsepower (index indicating air volume) of at least two air conditioners (10) is equal, the temperature of the intake air (suction temperature (Th1)) of these air conditioners (10) ) Select air conditioners (10) that have a high priority. In this example, the suction temperature (Th1) of the NO.2 air conditioner (10) is 28 ° C., and the suction temperature (Th1) of the NO.3 air conditioner (10) is 27.5 ° C. Therefore, in this example, the priority order of the air conditioner (10) of No. 2 having a high suction temperature is higher and is ranked second. No. 3 air conditioner (10) has the third priority.

  In this example, the horsepower (index indicating the air volume) of the remaining No. 4 and No. 5 air conditioners (10) is equal to each other, and their suction temperatures (Th1) are also equal to each other. In this case, these priorities are determined based on, for example, a preset identification number of the air conditioner (10).

  As described above, in the selection process of the present embodiment, the latent heat treatment machine (10-L) is preferentially given a smaller index indicating the air volume. In the latent heat treatment machine (10-L) with a small air volume, the flow rate bypassing the indoor heat exchanger (25) becomes small, and the contact time between the indoor air and the indoor heat exchanger (25) becomes long. For this reason, the amount of moisture condensed on the surface of the indoor heat exchanger (25) increases, and the SHF (sensible heat ratio) of the latent heat treatment machine (10-L) decreases. Therefore, the latent heat treatment capacity of the air conditioning system (1) can be sufficiently exhibited by giving priority to the latent heat treatment machine (10-L) with a small index indicating the air volume.

  In this example, when the horsepower of the plurality of air conditioners (10) is equal, the one having the higher suction temperature (Th1) is preferentially designated as the latent heat treatment machine (10-L). If the air conditioner (10) with a relatively low suction temperature (Th1) is a latent heat treatment machine (10-L), the suction temperature (Th1) of the latent heat treatment machine (10-L) becomes excessively low, and the thermo-off temperature ( May be less than (Thoff). On the other hand, thermo-off of the latent heat treatment machine (10-L) can be suppressed by preferentially using the air conditioner (10) having a high suction temperature (Th1) as the latent heat treatment machine (10-L).

<Modified example of determining priority of submerged heat treatment machine>
As for the priority order of the submerged heat treatment machine (10-L), as shown in the modification of FIG. 18, the selection based on the suction temperature (Th1) is given priority over the selection based on the air volume of the indoor air. Also good. That is, in this modification, first, the air conditioner (10) having a high suction temperature (Th1) among the plurality of air conditioners (10) is preferentially selected as the latent heat treatment machine (10-L). Thereby, it is possible to preferentially suppress the thermo-off of the latent heat treatment machine (10-L).

  When the suction temperature (Th1) of at least two or more air conditioners (10) is equal, an air conditioner (10) having a smaller horsepower (an index indicating the air flow) is used among these air conditioners (10). Select as latent heat treatment machine (10-L). Thereby, a latent heat treatment machine (10-L) with high latent heat treatment capability can be selected from a plurality of air conditioners (10) having the same suction temperature (Th1).

-Effect of the embodiment-
In the above embodiment, at least one of the plurality of air conditioners (10) is a latent heat treatment machine (10-L), at least one is a sensible heat treatment machine (10-S), and at least one is a blower (10-L). A control device (40) for executing an operation including the state (F) (latent microscope separation operation) is provided. Thus, by operating the blower (10-F) together with the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S), at least the sensible heat treatment capacity of the entire air conditioning system (1) becomes excessive. This can be suppressed.

  In the blower (10-F), the air volume of the indoor fan (27) is larger than that of the thermo-off device, and contributes to the circulation of indoor air. When the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S) are operated at the same time, the temperature and humidity of the blown air differ from each other. On the other hand, by operating the blower (10-F), indoor air can be sufficiently circulated and stirred, and such unevenness in temperature and humidity can be suppressed. As a result, the latent heat treatment machine (10-L) or the sensible heat treatment machine (10-S) is thermo-off due to, for example, temperature unevenness in the indoor air, or the above-described erroneous control is performed due to humidity unevenness. Can be avoided.

  In the above embodiment, in the latent-sensitive separation operation, if at least the condition (corresponding to the condition b1 in step ST73 in FIG. 16) that the temperature of the suction air of the sensible heat treatment machine (10-S) is lower than a predetermined value is satisfied, First control (step ST83) for switching (10-S) to the blower (10-F) is performed. Thereby, it is possible to avoid that the latent heat treatment machine (10-L) is thermo-off and the indoor air circulation effect is impaired.

  In the above-described embodiment, in the latent-supervised separation operation, the blower (10-F) is activated when at least the condition that the temperature of the intake air of the blower (10-F) is higher than a predetermined value (corresponding to the condition e1 in step ST76 in FIG. 16) is satisfied. ) Is switched to the sensible heat treatment machine (10-S) (step ST86). As a result, the sensible heat treatment capacity of the entire air conditioning system (1) can be increased, and the indoor air can be quickly cooled.

  In the above-described embodiment, in the latent separation operation, when the indoor humidity is higher than the predetermined value (corresponding to the condition c1 of step ST74 in FIG. 16), the temperature of the suction air of the blower (10-F) is higher than the predetermined value. When at least the condition (corresponding to the condition c4 of Step ST75 in FIG. 16) is satisfied, a third control (Step ST85) for changing the blower (10-F) to the latent heat treatment machine (10-L) is performed. As a result, the temperature and humidity of the indoor space can be quickly reduced under conditions where the humidity is relatively high and the ambient temperature of the blower (10-F) is high.

  In the number change control of the above embodiment, the latent heat treatment machine (10-L) is not controlled to be a blower (10-F). Condensed water tends to adhere to the surface of the indoor heat exchanger (25) of the latent heat treatment machine (10-L). For this reason, when the latent heat treatment machine (10-L) is changed to the blower (10-F), the water adhering to the surface of the indoor heat exchanger (25) of the blower (10-F) evaporates, and the indoor space This is because (5) may be released.

  In the above embodiment, in the latent-micro separation operation, the control device (40) changes the number of the latent heat treatment machine (10-L), the number of the sensible heat treatment machine (10-S), and the number of the blowers (10-F). At the time, change one by one. If the type or number of air conditioners (10) is changed at the same time, the latent heat treatment capacity and sensible heat treatment capacity of the air conditioning system (1) will change greatly. Along with this, the suction temperature (Th1) and the suction humidity (Rh1) of the air conditioner (10) change greatly, and the air conditioner (10) is thermo-off, and the various controls described above cannot be performed properly. there is a possibility. On the other hand, in the number change control, since the type and number of the air conditioners (10) are changed one by one, it is possible to suppress a large change in the latent heat treatment capacity and the sensible heat treatment capacity. As a result, such a problem can be avoided.

  In the above embodiment, when the number of the latent heat treatment machine (10-L), the number of the sensible heat treatment machine (10-S), and the number of the blower (10-F) are changed in the latent separation separation operation, a predetermined time (update) The change of the next number is prohibited until the interval ΔT × n) has elapsed (step ST71). Immediately after changing the number of units, the temperature and humidity of the indoor air are not stable, so if the next number change control is performed in such a situation, the type of the air conditioner (10) may be changed by mistake. There is. On the other hand, by prohibiting the change of the number until a predetermined time elapses, the number change control can be performed in a state where the temperature and humidity of the indoor air are stable. Accordingly, it is possible to suppress erroneous determination during the number change control.

<Blower wind direction>
It is preferable that the wind direction of the room air (blow air) of the blower (10-F) during the above-described latent microscope separation operation is close to a horizontal blow. Specifically, the direction of the blown air from the blower (10-F) is closer to the horizontal than the direction of the blown air from at least one of the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S). It is good. The blower (10-F) during the latent microscope separation operation has a role of circulating and mixing the indoor air in the indoor space (5). By making the air direction of the blower (10-F) closer to the horizontal in this way, the effect of circulating and mixing the indoor air is improved. In particular, since the temperature and humidity of the blown air from the latent heat treatment machine (10-L) and the temperature and humidity of the blown air from the sensible heat treatment machine (10-S) are different, the latent heat treatment machine (10-L) and the sensible heat treatment machine ( When 10-S) is operated at the same time, the temperature and humidity of the indoor air tend to be uneven. On the other hand, such unevenness in temperature and humidity can be reduced by making the air direction of the blown air from the blower (10-F) horizontal.

<< Other embodiments >>
In the above-described embodiment (including other modifications), the following configuration may be used.

  The air conditioner (10) may not be a pair type. For example, a so-called multi-type in which two or more indoor units (12) are connected to one outdoor unit (11) may be used.

  In the above embodiment, the control device (40) is configured by connecting the additional unit to the existing unit. However, the control device (40) may be configured without the additional unit. For example, by providing the main controller (45) in the local controller (41), the control device (40) can be configured without using a communication line such as the Internet (I).

  Although the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims. Further, the above embodiments and modifications may be appropriately combined or replaced as long as the functions of the subject of the present disclosure are not impaired. The above-mentioned descriptions “first”, “second”, “third”,... Are used to distinguish the words to which these descriptions are given, and the quantity and order of the words are also limited. Not what you want.

  As described above, the present invention is useful for an air conditioning system.

1 Air conditioning system
5 Indoor space
10 Air conditioner
10-L latent heat treatment machine
10-S sensible heat treatment machine
10-F blower
40 Control device

Claims (11)

A plurality of air conditioners (10) each performing an individual refrigeration cycle and targeting the same indoor space (5);
At least one of the air conditioners (10) is a latent heat treatment machine (10-L), at least one is a sensible heat treatment machine (10-S), and at least one is a blower (10-F). An air conditioning system comprising: a control device (40) for executing an operation including a state. In claim 1,
The said control apparatus (40) performs the 1st control which switches the said sensible heat processing machine (10-S) to an air blower (10-F) in the said driving | operation, The air conditioning system characterized by the above-mentioned. In claim 2,
The control device (40) performs the first control when the condition that the temperature of the intake air of the sensible heat treatment machine (10-S) is lower than a predetermined value is satisfied in the operation. . In any one of Claims 1 thru | or 3,
The said control apparatus (40) performs the 2nd control which switches the said air blower (10-F) to the said sensible heat processing machine (10-S) in the said driving | operation, The air conditioning system characterized by the above-mentioned. In claim 4,
In the operation, the control device (40) performs the second control when at least a condition that the temperature of the intake air of the blower (10-F) is higher than a predetermined value is satisfied. In any one of Claims 1 thru | or 5,
The said control apparatus (40) performs the 3rd control which switches the said air blower (10-F) to the said latent heat processing machine (10-L) in the said driving | operation, The air conditioning system characterized by the above-mentioned. In claim 6,
In the operation, the control device (40) is configured such that when at least a condition in which indoor humidity is higher than a predetermined value and a condition in which the temperature of the intake air of the blower (10-F) is higher than a predetermined value are satisfied, An air conditioning system characterized by performing control. In any one of Claims 1 thru | or 7,
The control device (40) performs control to switch the blower (10-F) to the latent heat treatment machine (10-L) in the operation, while the latent heat treatment machine (10-L) is blown to the blower (10-L). An air conditioning system characterized by not performing control to switch to F). In any one of claims 1 to 8,
When the number of the latent heat treatment machine (10-L), the sensible heat treatment machine (10-S), and the blower (10-F) is changed in the operation, the control device (40) is 1 An air conditioning system characterized by changing each unit. In any one of Claims 1 thru | or 9,
When the number of the latent heat treatment machine (10-L), the sensible heat treatment machine (10-S), and the blower (10-F) is changed in the operation, the control device (40) The air conditioning system is characterized by prohibiting the change of the next number until a predetermined time has passed. In any one of claims 1 to 10,
The control device (40) determines the air direction of the room air of the blower (10-F) from the air direction of the room air in at least one of the latent heat treatment machine (10-L) and the sensible heat treatment machine (10-S). The air conditioning system is also characterized by being leveled.

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