JP2012117804A - Trial operation method of air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trial operation method of air conditioning system capable of checking connection state of electric wiring for a refrigerant system in a short time.SOLUTION: The trial operation method of an air conditioning system 1 comprises a plurality of refrigerant systems A to D constituted by connecting compressors 21a to 21d, outdoor heat exchangers 23a to 23d, indoor expansion valves 43a to 43d and indoor heat exchangers 41a to 41d such that refrigerant circulates and is provided with the following steps. In a first step, a different trial operation is performed for each refrigerant system A to D. In a second step, the suitability of the connection state for each refrigerant system A to D is determined on the basis of a difference of a prescribed physical quantity or a difference of change corresponding to each refrigerant system A to D produced by performing a different trial operation for each refrigerant system A to D. Therein, when the different trial operation for each refrigerant system A to D is performed, a time zone when trial operations of respective refrigerant systems A to D proceed at the same time is disposed.

Description

  The present invention relates to a test operation method for an air conditioning system.

  For example, in an air conditioning system including a plurality of indoor units and a plurality of outdoor units as in the method described in Patent Document 1 (Japanese Patent Publication No. 07-065792), a refrigerant system between the indoor units and the outdoor units There has been proposed a method of grasping misconnections of electric wires and miswiring of electric wires between a controller and a controller provided in various refrigerant systems.

  In this method, when a trial operation is performed at the stage where the construction of the refrigerant system and the electric wiring is completed, a control signal is sent to the control device through the electric wiring to make the expansion valve of the specific refrigerant system squeezed. Refrigeration cycle is performed in a state, and a high pressure rise or a low pressure is detected to detect the occurrence of high pressure or low pressure. It is determined whether or not the refrigerant system in which the is detected matches.

  However, in the method of grasping erroneous connection and incorrect wiring as described in the above-mentioned Patent Document 1 (Japanese Patent Publication No. 07-065792), when the connection state of the refrigerant system is appropriate, a different refrigerant system is provided. If the connected devices between the control devices that perform the same functions are teleco (when there is a discrepancy), all the outdoor units that make up the air conditioning system and all the indoor units When the unit is operated at the same time, an increase in high pressure or a decrease in low pressure occurs in the object that is erroneously connected, so that a change similar to that in the case of normal connection occurs, and thus it is impossible to grasp the incorrect wiring. For example, the electrical wiring to be connected to the control device of the first refrigerant system is mistakenly connected to the control device of another second refrigerant system, and is connected to the control device of this second refrigerant system. If the electrical wiring to be connected is mistakenly connected to the control device of the first refrigerant system, each refrigerant system will be in the same operating state when operated at the same time. Arise.

  On the other hand, after sending a control signal for executing operation for a certain refrigerant system, by waiting until a high pressure rise or a low pressure drop is detected, the refrigerant system in which such a detection is seen By specifying, the connection state of the electrical wiring and the connection state of the refrigerant system can be associated with each other.

  However, when the connection check operation for each refrigerant system is performed as a trial operation at the stage where the construction of the refrigerant system and the electrical wiring is finished, the high pressure is started from the time when the operation of one certain refrigerant system is started. After confirming the connection state of the refrigerant system and the electrical wiring by detecting the increase in the pressure or the decrease in the low pressure, if you do not wait until the other confirmation work included in the test run is completed, you can check the connection of the next refrigerant system It cannot be migrated. For this reason, it takes a very long time to complete the trial operation for all the refrigerant systems.

  This invention is made | formed in view of the point mentioned above, The objective of this invention is providing the trial run method of the air-conditioning system which can confirm the connection state of the electrical wiring with respect to a refrigerant | coolant system | strain in a short time. .

  The trial operation method of the air conditioning system according to the first aspect of the present invention includes a plurality of refrigerant systems configured such that the compression mechanism, the heat source side heat exchanger, the expansion mechanism, and the use side heat exchanger are connected so that the refrigerant circulates. A test operation method for an air conditioning system having the following steps. In the first step, a different test operation is performed for each refrigerant system. In the second step, the suitability of the connection state for each refrigerant system is determined based on a difference in predetermined physical quantity or a difference corresponding to each refrigerant system that is generated by performing a different trial operation for each refrigerant system. Here, when a different test operation is performed for each refrigerant system, a time zone in which the test operation of each refrigerant system proceeds simultaneously is provided. In addition, between refrigerant systems, a refrigerant | coolant does not come and go mutually, and the refrigerating cycle is independent for every refrigerant system. In addition, the test operation different for each refrigerant system includes, for example, a case where all the refrigerant systems each perform their own test operation, and also includes a case where the same test operation is performed in some of all the refrigerant systems. It is. The predetermined physical quantity includes, for example, the degree of superheat, the degree of supercooling, the temperature of the refrigerant in the refrigerant system, the temperature of the air that has passed through the heat source side heat exchanger or the use side heat exchanger, and the like. However, the physical quantity may be a physical quantity that has a different value for each refrigerant system or has a different degree of change when a different trial operation is performed for each refrigerant system.

  In this trial operation method of the air conditioning system, a different trial operation is performed for each refrigerant system so that the value of the predetermined physical quantity differs for each refrigerant system, or the state of the predetermined physical quantity changes for each refrigerant system. Can make a difference. As a result, it is possible to grasp whether or not the refrigerant system that is going to perform the trial operation matches the refrigerant system that is actually subjected to the trial operation.

  Here, a time zone in which different trial runs for each refrigerant system proceed simultaneously is provided. For this reason, it is possible to shorten the time required to finish the trial operation of the entire air conditioning system as compared with the case where the connection confirmation work is sequentially performed for each refrigerant system after waiting for the trial operation for each refrigerant system. become.

  Further, even if a time zone in which the trial operation of each refrigerant system proceeds at the same time is provided as described above, the test operation performed in each refrigerant system is different, so that the connection confirmation work can be performed for each refrigerant system.

  Thereby, it becomes possible to confirm the connection state of the electrical wiring with respect to a refrigerant | coolant system | strain in a short time.

  The trial operation method of the air conditioning system according to the second aspect of the present invention is the trial operation method of the air conditioning system according to the first aspect, wherein the trial operation different for each refrigerant system is different by changing the operation start timing of the compression mechanism for each refrigerant system. is there. The operating load of the compression mechanism here may be the same load in all refrigerant systems, or may be a different load.

  In this trial operation method of the air conditioning system, since the operation start timing of the compression mechanism is changed for each refrigerant system, when a different trial operation is performed for each refrigerant system, the value of the predetermined physical quantity for each refrigerant system changes. It is possible to make a difference in timing. Thereby, the connection state of the electrical wiring with respect to a refrigerant | coolant system | strain can be confirmed.

  Further, here, even when the change in the value of the predetermined physical quantity is detected in the refrigerant system including the compression mechanism that has started operation, the operation may be started for the compression mechanism provided in another refrigerant system. In this case, the trial operation of the entire air conditioning system can be completed more quickly.

  The trial operation method of the air conditioning system according to the third aspect of the present invention is the trial operation method of the air conditioning system according to the first aspect or the second aspect, wherein the trial operation different for each refrigerant system is the operating load of the compression mechanism for each refrigerant system. To change. Here, changing the operation load of the compression mechanism includes, for example, a case where the output ratio with respect to the maximum output is different for each refrigerant system. In addition, here, it is desirable that the other elements other than the compression mechanism provided in the refrigerant system are in the same control state and the determination process of the refrigerant system is performed in a state where only the operation load of the compression mechanism is different. Other elements may be controlled so that the refrigerant systems can be more clearly distinguished.

  In this trial operation method of the air conditioning system, since the operation load of the compression mechanism is changed for each refrigerant system, when a different trial operation is performed for each refrigerant system, the value of the predetermined physical quantity is different for each refrigerant system. Or, the degree of change in the value of the predetermined physical quantity is different for each refrigerant system. For this reason, after the trial operation of the air conditioning system is started, the state in which the refrigerant system can be distinguished continues after the point when the difference in the value or change of the predetermined physical quantity can be detected. Thus, the refrigerant system determination process can be performed. Thereby, a freedom degree can be improved about the timing which performs the determination process of a refrigerant | coolant system | strain.

  When the trial operation method of the air conditioning system according to the third aspect is based on the trial operation method of the air conditioning system according to the second aspect, the operation load of each compression mechanism is changed while changing the operation start timing of each compression mechanism. By changing, it becomes easier to determine the difference in refrigerant system. For example, when the load of the compression mechanism of the refrigerant system for which the operation start timing is initially set is set to be large and the load of the compression mechanism for each refrigerant system is set to be small in the order of the timing, the refrigerant Since it becomes easier to discriminate the change in the value of the predetermined physical quantity for each system, the determination accuracy can be increased.

  The trial operation method of the air conditioning system according to the fourth aspect of the present invention is the trial operation method of the air conditioning system according to any one of the first to third aspects, wherein the trial operation different for each refrigerant system is the expansion mechanism for each refrigerant system. It is to change the valve opening. Here, it is desirable to perform the refrigerant system determination process in a state in which only the valve opening degree of the expansion mechanism is different with respect to other elements other than the expansion mechanism provided in the refrigerant system in the same control state. However, other elements may be controlled so that the refrigerant systems can be more clearly distinguished.

  In this trial operation method of the air conditioning system, since the valve opening of the expansion mechanism is changed for each refrigerant system, when a different trial operation is performed for each refrigerant system, the value of a predetermined physical quantity differs for each refrigerant system. It becomes a state, or the degree to which the value of the predetermined physical quantity changes varies from one refrigerant system to another. For this reason, after the trial operation of the air conditioning system is started, the state in which the refrigerant system can be distinguished continues after the point when the difference in the value or change of the predetermined physical quantity can be detected. Thus, the refrigerant system determination process can be performed. Thereby, a freedom degree can be improved about the timing which performs the determination process of a refrigerant | coolant system | strain.

  When the trial operation method of the air conditioning system according to the fourth aspect is based on the trial operation method of the air conditioning system according to the second aspect, the valve opening degree of each expansion mechanism is changed while changing the operation start timing of each compression mechanism. Also, it becomes easier to determine the difference in refrigerant system. For example, when the valve opening of the expansion mechanism in the refrigerant system in which the operation start timing is initially set is set to be small, and the valve opening of the expansion mechanism for each refrigerant system is set to increase along the order of the timing Since it becomes easier to discriminate changes in the value of the predetermined physical quantity for each refrigerant system, the determination accuracy can be increased.

  The trial operation method of the air conditioning system according to the fifth aspect of the present invention is the trial operation method of the air conditioning system according to any one of the first to fourth aspects. The trial operation different for each refrigerant system is different from that for each refrigerant system. It is to change the operation stop timing. The operating load of the compression mechanism here may be the same load in all refrigerant systems, or may be a different load.

  In this trial operation method of the air conditioning system, since the operation stop timing of the compression mechanism is changed for each refrigerant system, when a different trial operation is performed for each refrigerant system, the value of a predetermined physical quantity for each refrigerant system changes. It is possible to make a difference in timing. Thereby, the connection state of the electrical wiring with respect to a refrigerant | coolant system | strain can be confirmed.

  Further, here, even when the change in the value of the predetermined physical quantity is detected in the refrigerant system including the compression mechanism that has started operation, the operation of the compression mechanism included in the other refrigerant system may be stopped. In this case, the trial operation of the entire air conditioning system can be completed more quickly.

  In addition, when the trial operation method of the air conditioning system according to the fifth aspect is based on the trial operation method of the air conditioning system according to the second aspect, not only the operation start timing of the compression mechanism for each refrigerant system but also the operation stop timing. By making them different, the determination of the refrigerant system can be performed twice in one trial operation, and the determination accuracy can be improved.

  A test operation method for an air conditioning system according to a sixth aspect of the present invention is the test operation method for an air conditioning system according to any one of the first to fifth aspects, wherein the fan that sends an air flow to the heat source side heat exchanger is a refrigerant. It is provided for each system. Here, the trial run different for each refrigerant system is to change the air volume of the fan for each refrigerant system. In addition, here, it is desirable to perform the refrigerant system determination process in a state in which only the fan airflow is different with respect to other elements other than the fan provided in the refrigerant system. Other elements may be controlled so that the distinction can be made more clearly.

  In this trial operation method of the air conditioning system, since the fan air volume is changed for each refrigerant system, when a different trial operation is performed for each refrigerant system, the value of the predetermined physical quantity is different for each refrigerant system. Alternatively, the degree of change in the value of the predetermined physical quantity is different for each refrigerant system. For this reason, after the trial operation of the air conditioning system is started, the state in which the refrigerant system can be distinguished continues after the point when the difference in the value or change of the predetermined physical quantity can be detected. Thus, the refrigerant system determination process can be performed. Thereby, a freedom degree can be improved about the timing which performs the determination process of a refrigerant | coolant system | strain.

  When the trial operation method of the air conditioning system according to the sixth aspect is based on the trial operation method of the air conditioning system according to the second aspect, the air flow rate of each fan is changed while changing the operation start timing of each compression mechanism. Thus, it becomes easier to determine the difference in the refrigerant system. For example, if the fan flow rate of the refrigerant system for which the operation start timing is initially set is set to be small and the fan flow rate for each refrigerant system is set to increase in the order of the timing, Since it becomes easier to discriminate the change in the value of the predetermined physical quantity, it is possible to increase the determination accuracy.

  A test operation method for an air conditioning system according to a seventh aspect of the present invention is the test operation method for an air conditioning system according to any one of the first to sixth aspects, wherein a refrigerant is supplied to each refrigerant system by performing a different test operation for each refrigerant system. It is further provided with a third step of making it possible to determine whether or not the refrigerant charging amount for each refrigerant system is appropriate by circulating. In this third step, a time zone is set in which the process of waiting until the determination of whether or not the refrigerant charging amount for each refrigerant system is appropriate can proceed simultaneously for each refrigerant system.

  In the trial operation method of the air conditioning system, whether or not the refrigerant charge amount is appropriate is determined for each refrigerant system in the trial operation. Then, when determining whether or not the refrigerant charging amount is appropriate, a process of waiting until the state of the refrigerant system becomes a state where the determination can be performed is performed. Here, there is provided a time zone in which the process of waiting until the determination of whether or not the refrigerant charging amount for each refrigerant system is appropriate can proceed simultaneously for each refrigerant system.

  For this reason, after waiting for the trial operation for each refrigerant system including determination of the appropriateness of the refrigerant charge amount to end, the refrigerant charge amount for each refrigerant system is compared with the case where the connection check operation is sequentially performed for each refrigerant system. It is possible to shorten the time required to finish the trial operation of the entire air conditioning system by the time period in which the process of waiting until the determination of suitability is possible is simultaneously advanced.

  Thereby, even if it is a case where the suitability of the refrigerant | coolant filling amount is determined in the test run for every refrigerant | coolant system | strain, it becomes possible to confirm the connection state of the electrical wiring with respect to a refrigerant | coolant system | strain in a short time.

  The trial operation method of the air conditioning system according to the eighth aspect of the present invention is the trial operation method of the air conditioning system according to any one of the first to seventh aspects, wherein at least one refrigerant system of the plurality of refrigerant systems is on the use side. Multiple heat exchangers are configured to be connected in parallel with the refrigerant circulation flow, or multiple compression mechanisms and heat source side heat exchangers are connected in parallel to the refrigerant circulation flow. It is configured. In addition, for all of the plurality of refrigerant systems, a plurality of use side heat exchangers may be configured to be connected in parallel to the refrigerant circulation flow, or a plurality of compression mechanisms and heat source side heat exchangers may be configured. Further, it may be configured to be connected in parallel to the circulating flow of the refrigerant. In addition, a plurality of refrigerant systems include a plurality of usage side heat exchangers, a refrigerant system configured by being connected in parallel to the refrigerant circulation flow, a plurality of compression mechanisms and heat source side heat exchangers, a refrigerant And a refrigerant system configured to be connected in parallel to the circulation flow. In addition, a plurality of usage-side heat exchangers connected in parallel are provided with a fan for sending an air flow so as to correspond to each of them, and are configured so that individual air volume control can be performed. Also good. In addition, a plurality of heat source side heat exchangers connected in parallel are provided with a fan for sending an air flow so as to correspond to each of the heat source side heat exchangers, so that individual air volume control can be performed. Also good.

  In this trial operation method of the air conditioning system, even in a case where a complicated air conditioning system is constructed by including a parallel branch portion in the refrigerant circuit in at least one of the plurality of refrigerant systems, the electrical wiring of the refrigerant system The connection state can be confirmed in a short time.

  In the trial operation method of the air conditioning system according to the first aspect of the present invention, it is possible to confirm the connection state of the electrical wiring to the refrigerant system in a short time.

  In the trial operation method of the air conditioning system according to the second aspect of the present invention, the connection state of the electrical wiring to the refrigerant system can be confirmed by making a difference in the timing at which the value of the predetermined physical quantity for each refrigerant system changes. .

  In the trial operation method of the air conditioning system according to the third aspect of the present invention, the degree of freedom can be improved with respect to the timing of performing the refrigerant system determination processing.

  In the trial operation method of the air conditioning system according to the fourth aspect of the present invention, the degree of freedom can be improved with respect to the timing of performing the refrigerant system determination processing.

  In the trial operation method of the air conditioning system according to the fifth aspect of the present invention, the connection state of the electrical wiring to the refrigerant system can be confirmed.

  In the trial operation method of the air conditioning system according to the sixth aspect of the present invention, the degree of freedom can be improved with respect to the timing of performing the refrigerant system determination processing.

  In the trial operation method of the air conditioning system according to the seventh aspect of the present invention, even when the suitability of the refrigerant charging amount is determined in the trial operation for each refrigerant system, the connection state of the electrical wiring to the refrigerant system is confirmed in a short time. It becomes possible.

  In the trial operation method of the air conditioning system according to the eighth aspect of the present invention, even if at least one of the plurality of refrigerant systems includes a parallel branch portion in the refrigerant circuit, a complicated air conditioning system is constructed. It becomes possible to confirm the connection state of the electrical wiring to the refrigerant system in a short time.

In the air-conditioning system concerning one embodiment of the present invention, it is a schematic structure figure in case proper connection is made. In the air-conditioning system concerning one embodiment of the present invention, it is a schematic structure figure in case improper connection is made. It is a figure which shows the time chart concerning 1st Embodiment of this invention. It is a figure which shows the time chart concerning 2nd Embodiment of this invention. It is a figure which shows the time chart concerning 3rd Embodiment of this invention. It is a figure which shows the time chart concerning 4th Embodiment of this invention. It is a figure which shows the time chart concerning 5-7 embodiment of this invention. In the air conditioning system of 8th Embodiment of this invention, it is a schematic block diagram in case the appropriate connection is made | formed. In the air conditioning system of 8th Embodiment of this invention, it is a schematic block diagram when the improper connection is made | formed. In the air conditioning system of 8th Embodiment of this invention, it is a schematic block diagram in case the other improper connection is made | formed. In the air conditioning system of 9th Embodiment of this invention, it is a schematic block diagram when the appropriate connection is made | formed. In the air conditioning system of 9th Embodiment of this invention, it is a schematic block diagram when the improper connection is made | formed. In the air conditioning system of 10th Embodiment of this invention, it is a schematic block diagram in case the appropriate connection is made | formed. In the air conditioning system of 10th Embodiment of this invention, it is a schematic block diagram when the improper connection is made | formed.

<First Embodiment>
Hereinafter, a test operation method by the air conditioning system 1 in which an embodiment of the present invention is adopted will be described with reference to the drawings.

(1-1) Overall Configuration FIG. 1 shows an overall schematic configuration of the air conditioning system 1.

  The air conditioning system 1 includes a plurality of outdoor units 2a, 2b, 2c, and 2d connected in parallel to an indoor unit 4 that accommodates indoor heat exchangers and indoor expansion valves that belong to a plurality of refrigerant systems. ing. The air conditioning system 1 includes a plurality of refrigerant systems. In this embodiment, the air conditioning system 1 includes four refrigerant systems A, a refrigerant system B, a refrigerant system C, and a refrigerant system D.

  A combination of one indoor heat exchanger, an indoor expansion valve, and the like among the indoor units 4 is connected to one outdoor unit provided so as to belong to the same refrigerant system, thereby forming one refrigerant circuit. . The refrigerant circuits are configured independently of each other so that refrigerant does not flow between the refrigerant circuits. In the air conditioning system 1 of the present embodiment, a refrigerant circuit 10a is provided in the refrigerant system A, a refrigerant circuit 10b is provided in the refrigerant system B, a refrigerant circuit 10c is provided in the refrigerant system C, and a refrigerant circuit 10d is provided in the refrigerant system D. .

  Each refrigerant system A to D is provided with indoor control units 74a, 74b, 74c, 74d on the indoor unit 4 side and outdoor control units 72a, 72b, 72c, 72d on the outdoor units 2a, 2b, 2c, 2d side, respectively. It has been. The indoor control units 74a, 74b, 74c, and 74d and the outdoor control units 72a, 72b, 72c, and 72d can communicate with each other through electrical wiring between those that belong to the same refrigerant system. Connected one-on-one. The four indoor control units 74a, 74b, 74c, and 74d are connected so as to be able to communicate with each other via electrical wiring. Similarly, the four outdoor control units 72a, 72b, 72c, and 72d are also connected to each other via electrical wiring. Among these, the central controller 71 is connected to the indoor control unit 74d belonging to the refrigerant system D so as to be communicable via electric wiring. The centralized controller 71 receives a command for controlling each component of the air conditioning system 1, a command for starting a test operation, and the like, and a warning display when a predetermined operation state or abnormality occurs. An output unit 71y is provided. The central controller 71, the indoor controllers 74a, 74b, 74c, and 74d, and the four outdoor controllers 72a, 72b, 72c, and 72d constitute a controller 70 for controlling the air conditioning system 1. Control of each component of the air conditioning system 1 is executed based on commands received by the controller 71 and detection values of various sensors.

  Hereinafter, the refrigerant system A will be described as an example, and details of one refrigerant system will be described. Regarding the elements of the refrigerant systems B, C, and D, in the drawings, the member numbers of the elements of the refrigerant system A that differ only in the subscripts b, c, and d are those of the refrigerant system A described below. It shall have substantially the same function as the corresponding element, and a description thereof will be omitted.

(1-2) Details of Refrigerant System As shown in FIG. 1, the refrigerant system A includes a refrigerant circuit 10a, an indoor fan 42a, an outdoor fan 25a, a suction pressure sensor 31a, a discharge pressure sensor 32a, an indoor gas side temperature sensor 37a, The indoor liquid side temperature sensor 38a, the outdoor heat exchange temperature sensor 33a, the outdoor air temperature sensor 36a, and the indoor control unit 74a and the outdoor control unit 72a described above are provided.

  In the refrigerant circuit 10a, the element of the outdoor unit 2a as the heat source side device and the element belonging to the refrigerant system A in the indoor unit 4 as the use side device are connected by the refrigerant pipe, and the refrigerant in the indoor unit 4 Air conditioning is performed for the area handled by the system A.

  The refrigerant circuit 10a includes a compressor 21a, a four-way switching valve 22a, an outdoor heat exchanger 23a, an outdoor expansion valve 24a, an outdoor liquid pipe closing valve 27a, an indoor side liquid pipe closing valve 29a, an indoor expansion valve 43a, and an indoor heat exchange. The container 41a, the indoor side gas pipe closing valve 28a, and the outdoor side gas pipe closing valve 26a are connected through a refrigerant pipe.

  The compressor 21a, the four-way switching valve 22a, the outdoor heat exchanger 23a, the outdoor fan 25a, the outdoor expansion valve 24a, the outdoor liquid pipe closing valve 27a, the outdoor gas pipe closing valve 26a, the outdoor control unit 72a, the suction pressure The sensor 31a, the discharge pressure sensor 32a, the outside air temperature sensor 36a, and the outdoor heat exchange temperature sensor 33a are accommodated in the outdoor unit 2a. Among these, the compressor 21a, the four-way switching valve 22a, the outdoor fan 25a, the outdoor expansion valve 24a, the outdoor liquid pipe closing valve 27a, and the outdoor gas pipe closing valve 26a are connected to the outdoor control unit 72a, The controller 72a controls these. The outdoor temperature sensor 36a and the outdoor heat exchange temperature sensor 33a are connected to the outdoor control unit 72a, and the outdoor control unit 72a can grasp these detected values.

  The indoor side liquid pipe closing valve 29a, the indoor expansion valve 43a, the indoor heat exchanger 41a, the indoor fan 42a, the indoor side gas pipe closing valve 28a, the indoor control unit 74a, the indoor gas side temperature sensor 37a, and the indoor liquid side The temperature sensor 38 a is accommodated in the indoor unit 4. Among these, the indoor side liquid pipe closing valve 29a, the indoor expansion valve 43a, the indoor fan 42a, and the indoor side gas pipe closing valve 28a are connected to the indoor control unit 74a, and the indoor control unit 74a controls them. Moreover, the indoor gas side temperature sensor 37a and the indoor liquid side temperature sensor 38a are connected to the indoor control unit 74a, and the indoor control unit 74a can grasp these detected values.

  The compressor 21a includes a variable capacity type inverter and circulates the refrigerant in the refrigerant circuit 10a in an operating state.

  The four-way switching valve 22a is provided between the compressor 21a and the outdoor gas pipe closing valve 26a in the refrigerant circuit 10, and can switch between a cooling operation cycle and a heating operation cycle. In FIG. 1, the connection state when performing the cooling operation is indicated by a solid line, and the connection state when performing the heating operation is indicated by a dotted line. During the cooling operation, the outdoor heat exchanger 23a functions as a refrigerant cooler (condenser), and the indoor heat exchanger 41a functions as a refrigerant heater (evaporator). During the heating operation, the indoor heat exchanger 41a functions as a refrigerant cooler (condenser), and the outdoor heat exchanger 23a functions as a refrigerant heater (evaporator).

  The suction pressure sensor 31a is provided in the suction pipe between the compressor 21a and the four-way switching valve 22a, and detects the refrigerant pressure sucked into the compressor 21a.

  The discharge pressure sensor 32a is provided in the discharge pipe between the compressor 21a and the four-way switching valve 22a, and detects the refrigerant pressure discharged from the compressor 21a.

  The outdoor heat exchanger 23a is provided between the four-way switching valve 22a and the outdoor expansion valve 24a in the refrigerant circuit 10a.

  The outdoor heat exchanger temperature sensor 33a detects the temperature of the refrigerant flowing in the outdoor heat exchanger 23a (that is, the refrigerant temperature corresponding to the condensation temperature during the cooling operation or the refrigerant temperature corresponding to the evaporation temperature during the heating operation). To do.

  The outdoor fan 25a supplies an air flow to the outdoor heat exchanger 23a.

  The outside air temperature sensor 36a detects the air temperature before passing through the outdoor heat exchanger 23a.

  The outdoor expansion valve 24a is provided between the outdoor heat exchanger 23a and the outdoor liquid pipe closing valve 27a in the refrigerant circuit 10a, and adjusts the amount of refrigerant passing therethrough by adjusting the valve opening. Or adjust the pressure reduction of the refrigerant.

  In the refrigerant system A, the outdoor liquid pipe closing valve 27a of the outdoor unit 2a and the indoor side liquid pipe closing valve 29a of the indoor unit 4 are connected via a liquid refrigerant communication pipe that is a refrigerant pipe.

  The indoor expansion valve 43a is provided between the indoor side liquid pipe closing valve 29a and the indoor heat exchanger 41a in the refrigerant circuit 10a, and adjusts the amount of refrigerant passing therethrough by adjusting the valve opening degree. Or adjust the pressure reduction of the refrigerant.

  The indoor liquid side temperature sensor 38a detects the temperature of the refrigerant flowing between the indoor expansion valve 43a and the indoor heat exchanger 41a.

  The indoor heat exchanger 41a is provided in the refrigerant circuit 10 between the indoor expansion valve 43a and the indoor side gas pipe closing valve 28a.

  The indoor fan 42a supplies an air flow to the indoor heat exchanger 41a.

  The indoor gas side temperature sensor 37a detects the temperature of the refrigerant flowing between the indoor heat exchanger 41a and the indoor side gas pipe closing valve 28a.

  In the refrigerant system A, the indoor side gas pipe closing valve 28a of the indoor unit 4 and the outdoor side gas pipe closing valve 26a of the outdoor unit 2a are connected via a gas refrigerant communication pipe that is a refrigerant pipe.

  The control unit 70 grasps the detected values of the indoor gas side temperature sensor 37a and the indoor liquid side temperature sensor 38a via the indoor control unit 74a.

  The control part 70 grasps | ascertains the detected value of the outdoor heat exchanger temperature sensor 33a and the outdoor temperature sensor 36a via the outdoor control part 72a.

(1-3) Trial operation The trial operation of the air conditioning system 1 is performed by connecting the refrigerant pipes 10a to 10d of the air conditioning system 1 to a building or the like to be installed, and the outdoor control unit 72a. To 72d, indoor control units 74a to 74d, and the centralized controller 71 after the wiring connection work via the electrical wiring is completed. That is, before the trial operation is started, the indoor unit 4 is constructed, the outdoor units 2a to 2d are constructed, these are connected via the gas refrigerant communication pipes and the liquid refrigerant communication pipes, and the outdoor control units 72a to 72a. 72d and indoor control units 74a to 74d are connected one-to-one for each refrigerant system via electrical wiring, outdoor control units 72a to 72d are also connected to each other via electrical wiring, and indoor control units 74a to 74d are also connected to each other. The centralized controller 71 is connected to the indoor control unit 74d through electrical wiring.

  In the trial operation of this embodiment, when the refrigerant circuits 10a to 10d are each correctly constructed, it is possible to grasp the connection error of the electrical wiring. That is, a component of a certain outdoor unit among the plurality of outdoor units 2a to 2d and a component of the indoor unit 4 belonging to the same refrigerant system as the refrigerant system to which the component of the outdoor unit belongs are liquid. When the construction is correctly performed through the refrigerant communication pipe and the gas refrigerant communication pipe, a trial operation is performed so that the connection error of the electric wiring can be grasped.

  This test operation is started when a service engineer or the like inputs a test operation start instruction via the centralized controller 71. In this test operation, at least (i) whether or not telecoiling has occurred in the connection of electrical wiring (whether or not there is a discrepancy in connection), and (ii) whether or not each shut-off valve is open. (Iii) The control unit 70 performs a determination process for confirming the three items of whether or not the refrigerant charging amount in each refrigerant system is appropriate.

(1-3-1) Outline of Start of Trial Operation When the trial operation is started, the control unit 70 issues a command from the centralized controller 71 to start the operation of the compressors 21a to 21d. The data is transmitted to the outdoor control units 72a to 72d connected to the indoor control units 74a to 74d via the D indoor control units 74a to 74d.

  In this way, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connected state during the cooling operation, and the same frequency for the compressors 21a to 21d of the refrigerant systems A to D. The inverter is controlled using as a target value. Further, the control unit 70 controls the indoor gas side temperature sensors 37a to 37d and the suction pressure sensor 31a so that the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d in each refrigerant system becomes constant at the target superheat degree. Based on the values detected by ˜31d, the degree of superheat control is performed to control the degree of opening of the outdoor expansion valves 24a to 24d and the degree of opening of the indoor expansion valves 43a to 43d. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

  In the present embodiment, as will be described later, the timings at which the compressors 21a to 21d of the refrigerant systems A to D start operation are different.

(1-3-2) Wiring connection state determination process When the trial operation is started, the control unit 70 is connected to the indoor control unit 74a of the refrigerant system A as shown in the time chart of FIG. The operation start timing of the compressor controlled by (any of 72a to 72d) (see Sa in FIG. 3), the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74b of the refrigerant system B Timing of starting operation of the compressor to be controlled (see Sb in FIG. 3), timing of starting operation of the compressor controlled by the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74c of the refrigerant system C (Refer to Sc in FIG. 3), timing for starting the operation of the compressor controlled by the outdoor control unit (one of 72 a to 72 d) connected to the indoor control unit 74 d of the refrigerant system D (Sd in FIG. 3) (Refer to the above).

  Specifically, the control unit 70 first sends a command for starting the operation of the compressor from the centralized controller 71 to the outdoor control unit connected via the indoor control unit 74a of the refrigerant system A ( An attempt is made to start the operation of the compressor 21a belonging to the refrigerant system A when the wiring connection is correct). Then, the control part 70 makes the indoor control part 74a of the refrigerant | coolant system | strain A confirm that the fall of the detected value in the indoor liquid side temperature sensor 38a arises.

  Here, as shown in FIG. 2, the wiring connection state is incorrect, and the indoor controller 74 a of the refrigerant system A cannot confirm the decrease in the detected value in the indoor liquid side temperature sensor 38 a, and the other refrigerant systems B to When a decrease in the detected value in the indoor liquid side temperature sensors 38b to 38d is confirmed in the indoor control units 74b to 74d of D, the wiring connection state of the refrigerant system A is incorrect in the output unit 71y of the centralized controller 71. Is displayed and the test run is stopped. In this case, the indoor control unit 74a of the refrigerant system A outputs a display indicating that it is erroneously connected to the outdoor control unit of the refrigerant system to which the indoor liquid side temperature sensor in which a decrease in the detected value is confirmed belongs. Let

  In the indoor control unit 74a of the refrigerant system A, when it is confirmed that the detected value of the indoor liquid side temperature sensor 38a is lowered, the control unit 70 continues the superheat degree constant control for the refrigerant system A, Shift to the determination process of the filling amount. The control unit 70 then sends a command from the centralized controller 71 to the indoor control unit 74b of the refrigerant system B before the refrigerant filling amount determination process for the refrigerant system A is completed, so that the indoor control unit 74b is instructed. The connected outdoor control unit starts operation of the compressor (see Sb in FIG. 3 for starting operation of the compressor 21b belonging to the refrigerant system B when the wiring connection is correct). This causes the indoor control unit 74b of the refrigerant system B to confirm that the detection value in the indoor liquid side temperature sensor 38b is reduced.

  Here, similarly to the above, the indoor controller 74b of the refrigerant system B cannot confirm the decrease in the detected value of the indoor liquid side temperature sensor 38b, and the indoor controller 74c, 74d of the other refrigerant systems C, D When a decrease in the detected value in the side temperature sensors 38c, 38d is confirmed, the output unit 71y of the centralized controller 71 displays an output indicating that the wiring connection state of the refrigerant system B is incorrect, and stops the test operation. . In this case, the indoor control unit 74a of the refrigerant system A outputs a display indicating that it is erroneously connected to the outdoor control unit of the refrigerant system to which the indoor liquid side temperature sensor in which a decrease in the detected value is confirmed belongs. Let

  After such processing is further performed for the refrigerant system C (see Sc in FIG. 3), it is also performed for the refrigerant system D (see Sd in FIG. 3), and the determination of the wiring connection state is completed.

(1-3-3) Determination processing of open state of closing valve After starting the trial operation, the control unit 70 detects values of the suction pressure sensors 31a to 31d and the discharge pressure sensors 32a to 32d of the refrigerant systems A to D. Alternatively, the open state of each closing valve is determined by grasping the change in the value.

  The open / close valve open state determination process may be performed simultaneously with the wiring connection state determination process, or before the wiring connection state determination process is started, or the wiring connection state determination process is completed. It may be done later.

  In the open / close valve open state determination process, the control unit 70 waits for a predetermined time from the start of the operation of the compressors 21a to 21d of the refrigerant systems A to D, and then the suction pressure sensors 31a to 31d. And the detected values of the discharge pressure sensors 32a to 32d.

  Then, the control unit 70 determines whether or not the discharge pressure grasped at that time is higher than a predetermined determination high pressure value. Further, the control unit 70 determines whether or not the suction pressure grasped at that time is lower than a predetermined determination low pressure value.

  Here, when the control unit 70 determines that the discharge pressure is higher than a predetermined high pressure value, a discharge pressure sensor that detects the high pressure among the discharge pressure sensors 32a to 32d is provided. A warning indicating that there is a possibility that the outdoor liquid pipe closing valves 27a to 27d and the indoor liquid pipe closing valves 29a to 29d belonging to the refrigerant system may be closed. The output is made at the output unit 71y, and the trial run is stopped.

(1-3-4) Refrigerant charge amount determination process In the refrigerant charge amount determination process, the control unit 70 performs the superheat degree constant control so that the superheat degree of the refrigerant system is maintained at the target superheat degree. A process of waiting until it is continued for a predetermined stabilization time is performed.

  When a refrigerant system in which the target superheat degree continues to be stable over a predetermined stabilization time is generated, the detected value of each sensor, the rotational frequency of the compressor, the outdoor fan and the indoor Based on information such as the air volume of the fan, the amount of refrigerant charged in the refrigerant circuit of the refrigerant system is calculated.

  The control unit 70 determines whether or not the amount of refrigerant calculated here satisfies a predetermined filling amount condition, and when it is determined that the amount is satisfied, stops the operation of the refrigerant system. Thus, the trial operation for the refrigerant system is completed. When it is determined that the predetermined filling amount condition is not satisfied, the information on the refrigerant system and the insufficient refrigerant amount are displayed on the output unit 71y of the centralized controller 71, and the test operation is stopped. To do.

  Here, if a refrigerant system that does not satisfy the target superheat condition even if the standby for more than the predetermined stable standby time is continued, there is an abnormality in the refrigerant charging amount for the refrigerant system. Is output to the output unit 71y of the centralized controller 71, and the trial run is stopped.

(1-4) Features of the First Embodiment In the trial operation method of the air conditioning system 1 of the first embodiment, the compressors 21a to 21d for each refrigerant system are started to operate one by one.

  Here, when an instruction to start operation of a compressor belonging to a certain refrigerant system is sent from the centralized controller 71 to the indoor control unit of the refrigerant system, the indoor liquid side temperature sensor of the same indoor control unit By determining whether or not the decrease in the detected value can be grasped, it is possible to determine whether or not the connection state of the electrical wiring for the indoor control unit of the refrigerant system is appropriate. And after finishing the determination process of the wiring connection state about the indoor control part of the said refrigerant | coolant system | strain, the determination process of the wiring connection state about the indoor control part of another refrigerant | coolant system | strain is performed. Thereby, the connection state of the electrical wiring about every indoor control part of refrigerant | coolant system | strain AD can be confirmed correctly, and the presence or absence of miswiring can be determined and specified.

  Further, in the trial operation method of the air conditioning system 1, for a trial operation of a certain refrigerant system, three processes of a determination process of the wiring connection state of the indoor control unit, a determination process of the open state of the closing valve, and a determination process of the refrigerant charge amount Rather than waiting until all of the above are completed, a test operation for another refrigerant system is not started, but in each of the refrigerant systems A to D, a part of the test operation process is allowed to proceed at the same time. The entire trial run is in progress. Thereby, it is possible to finish the entire test operation of the air conditioning system 1 in a shorter time.

Second Embodiment
About the whole structure of 2nd Embodiment, and the detail of a refrigerant | coolant system | strain, it is the same as that of the said 1st Embodiment.

(2-1-1) Outline of Start of Trial Operation In the trial operation of the second embodiment, the control unit 70 issues a command from the centralized controller 71 to start the operation of the compressors 21a to 21d, and each refrigerant system A It transmits to the outdoor control parts 72a-72d connected to each indoor control part 74a-74d via the indoor control parts 74a-74d of -D.

  In this way, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connected state during the cooling operation, and the compressor 21a of the refrigerant system A and the compressor 21b of the refrigerant system B. The compressor 21c of the refrigerant system C and the compressor 21d of the refrigerant system D are all activated so as to perform inverter control using the same frequency as a target value.

  Here, as shown in FIG. 4, the control unit 70 causes the central controller 71 to send commands to the indoor control units 74 a to 74 d with a predetermined start time interval Ts interposed therebetween.

  That is, as shown in FIG. 4, the control unit 70 causes the centralized controller 71 to send a control signal to the indoor control unit 74 a of the refrigerant system A, so that the outdoor unit connected via the indoor control unit 74 a is connected. The operation of the compressor is started with respect to the control unit (any of 72a to 72d). Thereafter, the control unit 70 waits for a predetermined start time interval Ts to elapse, and then causes the centralized controller 71 to send a control signal to the indoor control unit 74b of the refrigerant system B, whereby the indoor control unit 74b. The operation of the compressor is started with respect to the outdoor control unit (any one of 72a to 72d) connected via. Thereafter, the control unit 70 waits for a predetermined start time interval Ts to elapse, and then causes the centralized controller 71 to send a control signal to the indoor control unit 74c of the refrigerant system C, whereby the indoor control unit The operation of the compressor is started with respect to the outdoor control unit (any one of 72a to 72d) connected through 74c. Thereafter, the control unit 70 waits for a predetermined start time interval Ts to elapse, and then sends a control signal to the indoor control unit 74d of the refrigerant system D by the centralized controller 71. The operation of the compressor is started with respect to the outdoor control unit (any one of 72a to 72d) connected via 74d.

  The predetermined start time interval Ts is set as a time interval that is short enough that the compressor belonging to another refrigerant system can be started before the refrigerant charge amount determination process for the refrigerant system A is completed at the latest. ing.

  In addition, here, in each refrigerant system, the control unit 70 uses the indoor gas side temperature sensors 37a to 37d and the indoor gas side temperature sensors 37a to 37d so that the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d is constant at the target superheat degree. Based on the values detected by the suction pressure sensors 31a to 31d, the degree of superheat is controlled to perform the opening control of the outdoor expansion valves 24a to 24d and the opening control of the indoor expansion valves 43a to 43d. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

(2-1-2) Wiring Connection State Determination Process As shown in FIG. 4, the control unit 70 is controlled by the outdoor control unit connected to the indoor control unit 74a of the refrigerant system A by starting the trial operation. Compressor driven by an outdoor control unit connected to a compressor to be driven, an outdoor control unit connected to the indoor control unit 74b of the refrigerant system B, and an indoor control unit 74c of the refrigerant system C The controller 70 is started while shifting the operation start timing at a predetermined start time interval Ts in the order of the compressor and the compressor driven by the outdoor controller connected to the indoor controller 74d of the refrigerant system D. Then, the indoor control units 74a to 74d of each of the refrigerant systems A to D are caused to confirm that the detection value has decreased in the indoor liquid side temperature sensors 38a to 38d. And the control part 70 grasps | ascertains and memorize | stores the timing which each indoor control part 74a-74d confirmed the fall of the detected value in indoor liquid side temperature sensor 38a-38d, respectively.

  Here, after grasping the timing when each indoor control unit 74a to 74d confirms the decrease in the detected value in the indoor liquid side temperature sensors 38a to 38d, the control unit 70 tries to drive the compressor at the start of the trial operation. The order of the refrigerant system of the indoor control units 74a to 74d that sent the instruction matches the order of the refrigerant system to which the indoor control units 74a to 74d to which the detected values in the indoor liquid side temperature sensors 38a to 38d belong have been confirmed. Determine whether or not.

  Here, when the control unit 70 determines that the orders are the same, the test operation is continued, and the constant superheat degree control is continued as it is, thereby shifting to the refrigerant charge amount determination process for each refrigerant system.

  In addition, when the order does not match, the control unit 70 causes the output unit 71y of the centralized controller 71 to output that a wiring connection error has occurred, and stops the trial operation. Here, the order of the refrigerant system of the indoor control units 74a to 74d that has sent an instruction to drive the compressor at the start of the trial operation, and the indoor control that confirms the decrease in the detected value in the indoor liquid side temperature sensors 38a to 38d. Information indicating the order of the refrigerant system to which the parts 74a to 74d belong is output to the output part 71y.

  Thereby, the service engineer etc. can grasp | ascertain the refrigerant | coolant system | strain in which the connection mistake of the electrical wiring has arisen.

  For example, as shown in FIG. 2, the wiring connection state is incorrect, the indoor control unit 74a of the refrigerant system A → the indoor control unit 74b of the refrigerant system B → the indoor control unit 74c of the refrigerant system C → the indoor control of the refrigerant system D When the compressor start command is sent in the order of the part 74d, the order of the refrigerant system to which the indoor control parts 74a to 74d to which the detected values in the indoor liquid side temperature sensors 38a to 38d belong is confirmed. In the order of refrigerant system B → refrigerant system A → refrigerant system C → refrigerant system D, the indoor control unit 74a is erroneously connected to the outdoor control unit 72b, and the indoor control unit 74b erroneously controls the outdoor control. It can be grasped that it is connected to the unit 72a.

(2-1-3) Open / Close Valve Open State Determination Processing This open / close valve open state determination processing is the same as in the first embodiment, and may be performed simultaneously with the wiring connection state determination processing. The wiring connection state determination process may be performed before the wiring connection state determination process is started or after the wiring connection state determination process is completed.

(2-1-4) Refrigerant filling amount determination processing This refrigerant filling amount determination processing is the same as that in the first embodiment.

(2-2) Features of Second Embodiment In the trial operation method of the air conditioning system 1 of the second embodiment, the compressors 21a to 21d for each refrigerant system are sequentially started at a predetermined start time interval Ts.

  And the control part 70 reduces the order of the refrigerant | coolant system | strain of the indoor control parts 74a-74d which sent the instruction | indication to drive a compressor at the time of a trial run start, and the fall of the detected value in the indoor liquid side temperature sensors 38a-38d. By comparing the confirmed order of the refrigerant systems to which the indoor control units 74a to 74d belong, the determination process of the wiring connection state is performed, and the presence / absence of the incorrect wiring can be determined and specified.

  For this reason, it is not necessary to wait until the determination process of the wiring connection state is completed for each refrigerant system, and the trial operation of each refrigerant system can be advanced simultaneously. Therefore, the entire trial operation of the air conditioning system 1 can be performed in a shorter time. It can be terminated.

<Third Embodiment>
About the whole structure of 3rd Embodiment, and the detail of a refrigerant | coolant system | strain, it is the same as that of the said 1st Embodiment.

(3-1-1) Outline of Start of Trial Operation In the trial operation of the third embodiment, the control unit 70 gives an instruction to start the operation of the compressors 21a to 21d from the centralized controller 71 to each refrigerant system A. It transmits to the outdoor control parts 72a-72d connected to each indoor control part 74a-74d via the indoor control parts 74a-74d of -D.

  Then, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connected state during the cooling operation, and the compressor 21a of the refrigerant system A, the compressor 21b of the refrigerant system B, the refrigerant system The compressor 21c of C and the compressor 21d of the refrigerant system D are all activated so as to perform inverter control using the same frequency as a target value.

  Here, as shown in FIG. 5, the control unit 70 includes an outdoor control unit connected to the indoor control unit 74a of the refrigerant system A, an outdoor control unit connected to the indoor control unit 74b of the refrigerant system B, and a refrigerant. For all of the outdoor control unit connected to the indoor control unit 74c of the system C and the outdoor control unit connected to the indoor control unit 74d of the refrigerant system D, the compressors 21a to 21d are fed from the centralized controller 71. By simultaneously transmitting a command for starting the operation, all of the compressors 21a to 21d are started simultaneously.

  Here, the control unit 70 includes the indoor gas side temperature sensors 37a to 37d and the suction pressure so that the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d is constant at the target superheat degree in each refrigerant system. Based on the values detected by the sensors 31a to 31d, the degree of superheat is controlled to perform the opening control of the outdoor expansion valves 24a to 24d and the opening control of the indoor expansion valves 43a to 43d. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

(3-1-2) Wiring connection state determination process The control unit 70 maintains the state in which the superheat degree is controlled to be substantially constant at the target superheat degree for all of the refrigerant systems A to D for a while. The values detected by the indoor liquid side temperature sensors 38a to 38d of the refrigerant systems A to D are stored in association with the refrigerant systems A to D, respectively.

  Thereafter, the control unit 70 sends a signal from the centralized controller 71 to stop the compressor to only the outdoor control unit connected to the indoor control unit 74a via the indoor control unit 74a of the refrigerant system A. Send. Thereby, a refrigerant | coolant will be in a state which does not flow into a refrigerant circuit provided with the compressor which the outdoor control part connected with the indoor control part 74a of the refrigerant | coolant system | strain A controls (refer Ea of FIG. 5).

  Thereafter, the control unit 70 determines whether or not a change occurs in the current detection values detected by the indoor liquid side temperature sensors 38a to 38d of the respective refrigerant systems, thereby storing the stored refrigerant systems A to D. The degree of deviation between the values of the indoor liquid side temperature sensors 38a to 38d and the current detected value is observed. Here, with respect to the current detected value of the indoor liquid side temperature sensor, only one indoor control unit that has confirmed a deviation of the predetermined value or more is specified.

  Here, when the connection state of the electrical wiring is correctly performed, the indoor control unit to which the signal indicating that the compressor is to be stopped is transmitted from the centralized controller 71 and the indoor control unit that has confirmed a deviation of the predetermined value or more. Will match. On the other hand, if this does not match, the refrigerant control system to which the indoor control unit to which the signal indicating that the compressor is to be stopped is transmitted from the centralized controller 71 mistakenly belongs to the indoor control unit that has confirmed a deviation of the predetermined value or more belongs. It is connected to the outdoor control unit. In this case, as in the first embodiment, the output unit 71y of the centralized controller 71 displays and outputs information for specifying a portion in which an erroneous connection is made, and stops the test run. Thereby, erroneous wiring can be confirmed.

  Subsequently, the control unit 70 starts from the centralized controller 71 to only the outdoor control unit connected to the indoor control unit 74b via the indoor control unit 74b of the refrigerant system B other than the refrigerant system A confirmed earlier. Then, a signal to stop the compressor is transmitted. Thereby, a refrigerant | coolant will be in the state which does not flow into a refrigerant circuit provided with the compressor which the outdoor control part connected with the indoor control part 74b of the refrigerant | coolant system | strain B controls (refer FIG.5 Eb). Hereinafter, similarly, the determination process of the wiring connection state is continued by observing the degree of deviation between the stored values of the indoor liquid side temperature sensors 38a to 38d for the refrigerant systems A to D and the current detection values.

  These operations are also performed on the indoor control unit 74c (see Ec in FIG. 5) of the refrigerant system C and the indoor control unit 74d (see Ed in FIG. 5) of the refrigerant system D, and the wiring connection state determination process is completed.

(3-1-3) Open / Close Valve Open State Determination Processing The open / close valve open state determination processing is the same as in the first embodiment, and may be performed simultaneously with the wiring connection state determination processing. The wiring connection state determination process may be performed before the wiring connection state determination process is started or after the wiring connection state determination process is completed.

(3-1-4) Refrigerant charge amount determination process The content of the refrigerant charge amount determination process is the same as in the first embodiment, but in the third embodiment, the correct connection is determined by the determination process of the wiring connection state. The refrigerant system for which the above is confirmed is immediately shifted to the refrigerant filling amount determination process. That is, with respect to the refrigerant system whose correct connection is confirmed by the determination process of the wiring connection state, the compressor is operated again while the determination process of the wiring connection state is continuously performed for the other refrigerant systems, and the refrigerant circuit Circulate the refrigerant. As a result, the refrigerant distribution state of the refrigerant circuit can be stabilized at an earlier timing, and the refrigerant charge amount can be determined.

(3-2) Features of Third Embodiment In the trial operation method of the air conditioning system 1 of the third embodiment, the compressors 21a to 21d for each refrigerant system in the operating state are stopped one by one in order.

  Here, when an instruction for stopping a compressor belonging to a certain refrigerant system is sent from the centralized controller 71 to the indoor control unit of the refrigerant system, the detection of the indoor liquid side temperature sensor in the same indoor control unit. By determining whether or not the change in value can be grasped, it is possible to determine whether or not the connection state of the electrical wiring for the indoor control unit of the refrigerant system is appropriate. And after finishing the determination process of the wiring connection state about the indoor control part of the said refrigerant system, the determination of the wiring connection state about the indoor control part of another refrigerant system is stopped by stopping the compressor of another refrigerant system. Processing is performed. Thereby, the connection state of the electrical wiring about every indoor control part of refrigerant | coolant system | strain AD can be confirmed correctly, and the presence or absence of miswiring can be determined and specified.

  Further, in the trial operation method of the air conditioning system 1, for a trial operation of a certain refrigerant system, three processes of a determination process of the wiring connection state of the indoor control unit, a determination process of the open state of the closing valve, and a determination process of the refrigerant charge amount Rather than waiting until all of the above are completed, a test operation for another refrigerant system is not started, but in each of the refrigerant systems A to D, a part of the test operation process is allowed to proceed at the same time. The entire trial run is in progress. Thereby, it is possible to finish the entire test operation of the air conditioning system 1 in a shorter time.

<Fourth embodiment>
About the whole structure of 4th Embodiment, and the detail of a refrigerant | coolant system | strain, it is the same as that of the said 1st Embodiment.

(4-1-1) Outline of Start of Trial Operation In the trial operation of the fourth embodiment, the control unit 70 issues a command from the centralized controller 71 to start the operation of each of the compressors 21a to 21d. It transmits to the outdoor control parts 72a-72d connected to each indoor control part 74a-74d via the indoor control parts 74a-74d of -D.

  Then, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connected state during the cooling operation, and the compressor 21a of the refrigerant system A, the compressor 21b of the refrigerant system B, the refrigerant system The compressor 21c of C and the compressor 21d of the refrigerant system D are all activated so as to perform inverter control using the same frequency as a target value.

  Here, as shown in FIG. 6, the control unit 70 includes an outdoor control unit connected to the indoor control unit 74a of the refrigerant system A, an outdoor control unit connected to the indoor control unit 74b of the refrigerant system B, and a refrigerant. For all of the outdoor control unit connected to the indoor control unit 74c of the system C and the outdoor control unit connected to the indoor control unit 74d of the refrigerant system D, the compressors 21a to 21d are fed from the centralized controller 71. By simultaneously transmitting a command for starting the operation, all of the compressors 21a to 21d are started simultaneously.

  Here, the control unit 70 includes the indoor gas side temperature sensors 37a to 37d and the suction pressure so that the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d is constant at the target superheat degree in each refrigerant system. Based on the values detected by the sensors 31a to 31d, the degree of superheat is controlled to perform the opening control of the outdoor expansion valves 24a to 24d and the opening control of the indoor expansion valves 43a to 43d. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

(4-1-2) Wiring connection state determination processing The control unit 70 maintains the state in which the superheat degree is controlled to be substantially constant at the target superheat degree for all the refrigerant systems A to D for a while, The values detected by the indoor liquid side temperature sensors 38a to 38d of the refrigerant systems A to D are stored in association with the refrigerant systems A to D, respectively.

  Thereafter, as shown in FIG. 6, the control unit 70 is connected to the indoor control unit 74a and the outdoor control unit connected to the indoor control unit 74b via the indoor control unit 74a of the refrigerant system A. , The outdoor controller connected to the indoor controller 74c, and the outdoor controller connected to the indoor controller 74d in this order from the centralized controller 71 with a predetermined stop time interval Te. Send a signal to stop the machine.

  As a result, the refrigerant does not flow in the refrigerant circuit including the compressor controlled by the outdoor control unit connected to the indoor control unit 74a of the refrigerant system A, and after the predetermined stop time interval Te, the refrigerant system In the refrigerant circuit including the compressor that is controlled by the outdoor control unit 74b connected to the B indoor control unit 74b, the refrigerant does not flow, and after the predetermined stop time interval Te, the indoor control of the refrigerant system C is performed. In the refrigerant circuit including the compressor controlled by the outdoor control unit connected to the unit 74c, the refrigerant does not flow, and after the predetermined stop time interval Te, the indoor control unit 74d of the refrigerant system D The refrigerant does not flow through the refrigerant circuit including the compressor controlled by the connected outdoor control unit.

  Then, the control part 70 grasps | ascertains and memorize | stores the order in which the present detected value which the indoor liquid side temperature sensors 38a-38d of each refrigerant system have detected changes.

  In this way, the control unit 70 recognizes the order of the indoor control unit to which the outdoor control unit that has transmitted the operation stop signal is connected, and the change in the detected values of the indoor liquid side temperature sensors 38a to 38d actually. A miswiring can be confirmed by comparing the order of the control units. Here, if the order of the indoor control units is the same, the electrical wiring is connected correctly, and if the order is not the same, incorrect wiring occurs in the mismatched combination. Can be identified.

(4-1-3) Open / Close Valve Open State Determination Processing This open / close valve open state determination processing is the same as in the first embodiment, and may be performed simultaneously with the wiring connection state determination processing. The wiring connection state determination process may be performed before the wiring connection state determination process is started or after the wiring connection state determination process is completed.

(4-1-4) Refrigerant Charge Amount Determination Processing The content of the refrigerant charge amount determination processing is the same as that in the first embodiment, but in the fourth embodiment, each compressor is set at a predetermined stop time interval. By sequentially stopping at Te, after all the compressors are stopped, all the compressors 21a to 21d are operated again, and the refrigerant is circulated through all the refrigerant circuits 10a to 10d. Thereby, when the refrigerant distribution state of the refrigerant circuit is stabilized, the refrigerant filling amount is determined. Even if all the compressors 21a to 21d are operated again, changes in the detected values of the indoor liquid side temperature sensors 38a to 38d due to the sequential stop of the compressors at a predetermined stop time interval Te are confirmed. Therefore, the determination process of the wiring connection state can be performed without any problem.

(4-2) Features of Fourth Embodiment In the trial operation method of the air conditioning system 1 of the fourth embodiment, the compressors 21a to 21d for each refrigerant system are sequentially stopped at a predetermined time interval Te.

  And the control part 70 confirmed the fall of the detection value in the order of the refrigerant | coolant system | strain of the indoor control parts 74a-74d which sent the instruction | indication to stop a compressor, and the indoor liquid side temperature sensor 38a-38d. By comparing the order of the refrigerant systems to which 74a to 74d belong, the determination process of the wiring connection state is performed, and the presence / absence of miswiring can be determined and specified.

  Then, after all the compressors are stopped by sequentially stopping the compressors, the refrigerant charge amount determination process is not performed by shifting the time zone for each of the refrigerant systems A to D. The refrigerant filling amount determination process can proceed simultaneously for the refrigerant systems A to D, and the entire test operation of the air conditioning system 1 can be completed earlier.

<Fifth Embodiment>
About the whole structure of 5th Embodiment, and the detail of a refrigerant | coolant system | strain, it is the same as that of the said 1st Embodiment.

(5-1-1) Outline of Start of Trial Operation When the trial operation is started, the control unit 70 issues a command from the centralized controller 71 to start the operation of the compressors 21a to 21d. The data is transmitted to the outdoor control units 72a to 72d connected to the indoor control units 74a to 74d via the D indoor control units 74a to 74d.

  In this way, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connection state during the cooling operation, and has different frequencies for the compressors 21a to 21d of the refrigerant systems A to D. Inverter control is started simultaneously with (different loads) as target values. Further, the control unit 70 controls the indoor gas side temperature sensors 37a to 37d and the suction pressure sensor 31a so that the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d in each refrigerant system becomes constant at the target superheat degree. Based on the values detected by ˜31d, the degree of superheat control is performed to control the degree of opening of the outdoor expansion valves 24a to 24d and the degree of opening of the indoor expansion valves 43a to 43d. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

(5-1-2) Wiring connection state determination process As shown in the time chart of FIG. 7, the control unit 70 is connected to the indoor control unit 74 a of the refrigerant system A (any one of the outdoor control units 72 a to 72 d). The frequency of the compressor controlled by the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74b of the refrigerant system B so that the frequency of the compressor controlled by) becomes the maximum frequency (100%). So that the frequency of the compressor controlled by the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74c of the refrigerant system C becomes 60% of the maximum frequency. Furthermore, the target frequency is set for each compressor so that the frequency of the compressor controlled by the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74d of the refrigerant system D becomes 40% of the maximum frequency. To be different And start them at the same time.

  Specifically, the control unit 70 sends a command from the centralized controller 71 to the outdoor control unit connected via the indoor control unit of each refrigerant system so that the compressor is operated at the target frequency. .

  Thereafter, the controller 70 causes the indoor controllers 74a to 74d of the refrigerant systems A to D to check the detected values of the indoor gas side temperature sensors 37a to 37d and the detected values of the indoor liquid side temperature sensors 38a to 38d. Remember. Furthermore, the control unit 70 causes the outdoor control units 72a to 72d of each refrigerant system to check and store the detection values of the suction pressure sensors 31a to 31d and the detection values of the discharge pressure sensors 32a to 32d.

  Thereby, the control part 70 is the order of the indoor control part connected to the outdoor control part which controls the compressor with a large target frequency, the magnitude | size order of the detected value of indoor gas side temperature sensor 37a-37d, indoor liquid. The order of the detection values of the side temperature sensors 38a to 38d, the order of the detection values of the suction pressure sensors 31a to 31d, and the order of the detection values of the discharge pressure sensors 32a to 32d are compared. Thus, it is determined whether or not an erroneous wiring of the electrical wiring has occurred.

  Here, since there are multiple items compared with the order of the indoor control unit connected to the outdoor control unit that controls the compressor having a large target frequency, there may be some error in the detection value of each sensor. By comparing with other items, the wiring connection state can be confirmed more accurately.

  Specifically, if there is no error in the wiring connection state, the relationship between the target frequency of the compressor and the detection value of each sensor is as follows.

  The liquid refrigerant temperature at the inlets of the indoor heat exchangers 41a to 41d detected by the indoor liquid side temperature sensors 38a to 38d becomes lower as the refrigerant circuit is controlled so that the target frequency of the compressor is larger.

  In addition, the refrigerant gas temperature at the outlets of the indoor heat exchangers 41a to 41d detected by the indoor gas side temperature sensors 37a to 38d also becomes lower as the refrigerant circuit is controlled to have a higher target frequency of the compressor. .

  Further, the suction refrigerant pressures of the compressors 21a to 21d detected by the suction pressure sensors 31a to 31d are lower as the refrigerant circuit is controlled to have a higher target frequency of the compressor.

  Further, the discharge refrigerant pressures of the compressors 21a to 21d detected by the discharge pressure sensors 32a to 32d are higher as the refrigerant circuit is controlled to have a higher target frequency of the compressor.

  Based on the relationship between the detected value of each sensor and the target frequency of the compressor, it can be determined whether or not an incorrect wiring of the electric wiring has occurred.

  For example, as shown in FIG. 2, the indoor control unit 74 a to which the control instruction is sent from the centralized controller 71 so that the target frequency becomes the maximum frequency (100%) is erroneously connected to the outdoor control unit 72 b. In this case, for the refrigerant system B to which the refrigerant circuit 10b including the compressor 21b controlled by the outdoor control unit 72b belongs, the detected value of the indoor gas side temperature sensor 37b is the lowest temperature, and the indoor liquid side temperature sensor The detected value of 38b is the lowest temperature, the detected value of the suction pressure sensor 31b is the lowest pressure, and the detected value of the discharge pressure sensor 32b is the highest pressure. In addition, for the refrigerant system A to which the refrigerant circuit 10a including the compressor 21a that is controlled by the outdoor control unit 72a to which the outdoor control unit 72a, which should have received the wiring connection is appropriate, belongs to the indoor gas side temperature sensor 37a. , The detected value of the indoor liquid side temperature sensor 38a does not become the lowest temperature, the detected value of the suction pressure sensor 31b does not become the lowest pressure, and the discharge pressure sensor 32b. The detected value is not the highest pressure. Thereby, it can be confirmed that the indoor control unit 74a is erroneously connected to the outdoor control unit 72b.

  Here, when an erroneous wiring has occurred, the content output to the output unit 71y of the centralized controller 71 is the same as that in the first embodiment, and the point that the trial run is stopped is also the same as in the first embodiment. .

  When it is determined that the connection state of the electrical wiring is appropriate, the control unit 70 continues the superheat degree constant control in each of the refrigerant systems A to D, and shifts to the refrigerant charging amount determination process.

(5-1-3) Open / Close Valve Open State Determination Processing The open / close valve open state determination processing is the same as in the first embodiment, and may be performed simultaneously with the wiring connection state determination processing. The wiring connection state determination process may be performed before the wiring connection state determination process is started or after the wiring connection state determination process is completed.

(5-1-4) Refrigerant Charging Amount Determination Processing The contents of the refrigerant charging amount determination processing are the same as those in the first embodiment.

(5-2) Features of Fifth Embodiment In the trial operation method of the air conditioning system 1 of the fifth embodiment, control is performed such that the target frequency is different in the frequency control of the compressors 21a to 21d for each refrigerant system.

  And the control part 70 performs the determination process of a wiring connection state by comparing the order of the detection value of each sensor, and the order of the value of a target frequency, and judges the presence or absence of miswiring, and specifies it. Is done.

  In addition, the refrigerant filling amount determination process can be performed simultaneously for all the refrigerant systems A to D, instead of performing the refrigerant filling amount determination process by shifting the time zone for each of the refrigerant systems A to D, and the air conditioning system. It is possible to finish the entire test run of 1 earlier.

(5-3) Modification of Fifth Embodiment In the fifth embodiment, control is performed such that a difference occurs in the load in each refrigerant system A to D by determining the target frequency of the compressor. Instead, the target evaporating temperature of the refrigerant or the target saturation pressure of the refrigerant may be set to be changed for each refrigerant system so that the load in each of the refrigerant systems A to D may be controlled.

<Sixth Embodiment>
About the whole structure of 6th Embodiment, and the detail of a refrigerant | coolant system | strain, it is the same as that of the said 1st Embodiment.

(6-1-1) Outline of Start of Trial Operation When the trial operation is started, the control unit 70 issues a command from the centralized controller 71 to start the operation of the compressors 21a to 21d. The data is transmitted to the outdoor control units 72a to 72d connected to the indoor control units 74a to 74d via the D indoor control units 74a to 74d.

  In this way, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connected state during the cooling operation, and the same frequency for the compressors 21a to 21d of the refrigerant systems A to D. The inverter control is started simultaneously with the target value (see FIG. 7). Further, the control unit 70 maintains the outdoor expansion valves 24a to 24d in a fully opened state, and the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d in each refrigerant system is different for each refrigerant system. Constant superheat degree control for controlling the opening degree of each of the indoor expansion valves 43a to 43d based on the values detected by the indoor gas side temperature sensors 37a to 37d and the suction pressure sensors 31a to 31d so that the respective superheat degrees are constant. I do. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

(6-1-2) Wiring connection state determination processing The control unit 70 grasps the detected value of the indoor gas side temperature sensor 37a and the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74a. The central controller 71 issues a command to control the indoor expansion valve 43a so that the degree of superheat of the refrigerant at the outlet of the indoor heat exchanger 41a is maintained at 5 degrees based on the detected value of the suction pressure sensor. It is transmitted to the indoor control unit 74a of the system A.

  At the same time, the control unit 70 is based on the detection value of the indoor gas side temperature sensor 37b and the detection value of the suction pressure sensor grasped by the outdoor control unit (one of 72a to 72d) connected to the indoor control unit 74b. A command to control the indoor expansion valve 43b is transmitted from the centralized controller 71 to the indoor control unit 74b of the refrigerant system B so that the degree of superheat of the refrigerant at the outlet of the indoor heat exchanger 41b is maintained at 8 degrees.

  At the same time, the control unit 70 is based on the detection value of the indoor gas side temperature sensor 37c and the detection value of the suction pressure sensor grasped by the outdoor control unit (one of 72a to 72d) connected to the indoor control unit 74c. A command to control the indoor expansion valve 43c is transmitted from the centralized controller 71 to the indoor control unit 74c of the refrigerant system C so that the degree of superheat of the refrigerant at the outlet of the indoor heat exchanger 41c is maintained at 10 degrees.

  At the same time, the control unit 70 is based on the detection value of the indoor gas side temperature sensor 37d and the detection value of the suction pressure sensor grasped by the outdoor control unit (one of 72a to 72d) connected to the indoor control unit 74d. A command to control the indoor expansion valve 43d is transmitted from the centralized controller 71 to the indoor control unit 74d of the refrigerant system D so that the degree of superheat of the refrigerant at the outlet of the indoor heat exchanger 41d is maintained at 15 degrees.

  Thereafter, the control unit 70 waits until the refrigerant circuits 10a to 10d are in a stable state, and then determines the valve opening degrees of the indoor expansion valves 43a to 43d and the detected temperatures of the indoor liquid side temperature sensors 38a to 38d. Then, the indoor control units 74a to 74d of the refrigerant systems A to D are confirmed, and further, the detected pressure values of the suction pressure sensors 31a to 31d are transmitted to the outdoor control units connected to the indoor control units 74a to 74d. Confirm and remember each.

  Thereby, the control part 70 is the order of each indoor control part 74a-74d about the magnitude | size of target superheat degree, the order of the magnitude | size of the valve opening degree of each indoor expansion valve 43a-43d, each suction pressure sensor 31a-. By comparing the order of the magnitude of the detected pressure 31d and the order of the magnitude of the detected temperature of each of the indoor liquid side temperature sensors 38a to 38d, it is determined whether or not an incorrect wiring of the electrical wiring has occurred. .

  Here, since there are multiple items compared with the order of the indoor control unit connected to the outdoor control unit that controls the compressor having a large target frequency, there may be some error in the detection value of each sensor. By comparing with other items, the wiring connection state can be confirmed more accurately.

  Specifically, if there is no error in the wiring connection state, the relationship between the target superheat degree and the detection value of each sensor is as follows.

  The magnitude | size of the valve opening degree of each indoor expansion valve 43a-43d becomes small, so that the refrigerant | coolant circuit in which the target superheat degree is controlled to a large value is controlled.

  Further, the suction refrigerant pressures of the compressors 21a to 21d detected by the suction pressure sensors 31a to 31d are lower as the refrigerant circuit is controlled to have a higher target superheat degree.

  Moreover, the temperature of the refrigerant | coolant which flows in into the indoor heat exchangers 41a-41d which each indoor liquid side temperature sensor 38a-38d detects becomes a low temperature, so that the refrigerant circuit controlled to the value with a large target superheat degree.

  Based on the relationship between the detection value of each sensor and the target superheat degree, it is possible to grasp whether or not an incorrect wiring of the electric wiring has occurred.

  For example, as shown in FIG. 2, when the indoor control unit 74 a to which the control instruction is sent from the centralized controller 71 so that the target superheat degree is 5 degrees is erroneously connected to the outdoor control unit 72 b The detected pressure of the suction pressure sensor 31b grasped by the outdoor control unit 72b does not become the highest value.

  Here, when an erroneous wiring has occurred, the content output to the output unit 71y of the centralized controller 71 is the same as that in the first embodiment, and the point that the trial run is stopped is also the same as in the first embodiment. .

  When it is determined that the connection state of the electrical wiring is appropriate, the control unit 70 continues the superheat degree constant control in each of the refrigerant systems A to D, and shifts to the refrigerant charging amount determination process.

(6-1-3) Open / Close Valve Open State Determination Processing The open / close valve open state determination processing is the same as in the first embodiment, and may be performed simultaneously with the wiring connection state determination processing. The wiring connection state determination process may be performed before the wiring connection state determination process is started or after the wiring connection state determination process is completed.

(6-1-4) Refrigerant Charging Amount Determination Processing The contents of the refrigerant charging amount determination processing are the same as those in the first embodiment.

(6-2) Features of Sixth Embodiment In the trial operation method of the air conditioning system 1 of the sixth embodiment, the value of the target superheat degree differs in the control of the valve opening degree of each indoor expansion valve 43a to 43d for each refrigerant system. So that it is controlled.

  And the control part 70 performs the determination process of a wiring connection state by comparing the order of the detection value of each sensor, and the order of the value of a target superheat degree, and determines the presence or absence of miswiring, and specifies it. Is able to.

  In addition, the refrigerant filling amount determination process can be simultaneously performed for all the refrigerant systems A to D, instead of performing the refrigerant filling amount determination process by shifting the time zone for each of the refrigerant systems A to D, and wiring. Since the process waits until the refrigerant circuits 10a to 10d are in a stable state during the connection state determination process, the refrigerant charge amount determination process is started immediately after confirming that no miswiring has occurred. Thus, the entire test operation of the air conditioning system 1 can be completed earlier.

<Seventh embodiment>
About the whole structure of 7th Embodiment, and the detail of a refrigerant | coolant system | strain, it is the same as that of the said 1st Embodiment.

(7-1-1) Outline of Start of Trial Operation When the trial operation is started, the control unit 70 issues a command from the centralized controller 71 to start the operation of the compressors 21a to 21d. The data is transmitted to the outdoor control units 72a to 72d connected to the indoor control units 74a to 74d via the D indoor control units 74a to 74d.

  In this way, the control unit 70 sets all the four-way switching valves 22a to 22d of the refrigerant systems A to D to the connected state during the cooling operation, and the same frequency for the compressors 21a to 21d of the refrigerant systems A to D. The inverter control is started simultaneously with the target value (see FIG. 7). Further, the control unit 70 keeps the outdoor expansion valves 24a to 24d fully open, and the superheat degree of the refrigerant flowing through the outlets of the indoor heat exchangers 41a to 41d in each refrigerant system is constant at the same target superheat degree. Thus, the degree of superheat control is performed to control the opening degree of each of the indoor expansion valves 43a to 43d based on the values detected by the indoor gas side temperature sensors 37a to 37d and the suction pressure sensors 31a to 31d. Here, the outdoor fans 25a to 25d are controlled so that the set air volume of the fans differs for each of the refrigerant systems A to D. The control conditions of other control devices are controlled so as to be the same between the refrigerant systems.

(7-1-2) Wiring connection state determination processing The control unit 70 sets the maximum value of the set air volume for the outdoor fan controlled by the outdoor control unit (any of 72a to 72d) connected to the indoor control unit 74a. The central controller 71 transmits a command for performing control so as to operate at 100% output to the indoor control unit 74a of the refrigerant system A.

  At the same time, the control unit 70 controls the outdoor fan connected to the indoor control unit 74b (any one of 72a to 72d) to operate at an output of 80% of the maximum value of the set air volume. Is sent from the centralized controller 71 to the indoor control unit 74b of the refrigerant system B.

  At the same time, the control unit 70 controls the outdoor fan connected to the indoor control unit 74c (any one of 72a to 72d) to operate at an output of 60% of the maximum value of the set air volume. Is sent from the centralized controller 71 to the indoor control unit 74c of the refrigerant system C.

  At the same time, the control unit 70 controls the outdoor fan connected to the indoor control unit 74d (any one of 72a to 72d) to operate at an output of 40% of the maximum value of the set air volume. Is sent from the centralized controller 71 to the indoor control unit 74d of the refrigerant system D.

  Thereafter, the control unit 70 waits until the refrigerant circuits 10a to 10d are in a stable state, and then confirms the valve openings of the indoor expansion valves 43a to 43d with the indoor control units 74a to 74d of the refrigerant systems A to D. Further, the detected pressure values of the discharge pressure sensors 32a to 32d are confirmed by the outdoor control units connected to the indoor control units 74a to 74d and stored.

  Thereby, the control part 70 is the order of each indoor control part 74a-74d about the magnitude | size of setting air volume, the order of the magnitude | size of the valve opening degree of each indoor expansion valve 43a-43d, and each discharge pressure sensor 32a. By comparing the order of the magnitudes of the detected pressures of -32d, it is determined whether or not an incorrect wiring of the electrical wiring has occurred.

  Here, since there are a plurality of items to be compared with the order of the indoor control units 74a to 74d regarding the magnitude of the set air volume, even if a slight error occurs in the detection value of each sensor, By comparing these, it is possible to more accurately check the wiring connection state.

  Specifically, if there is no error in the wiring connection state, the relationship between the set air volume and the detection value of each sensor is as follows.

  The magnitude | size of the valve opening degree of each indoor expansion valve 43a-43d becomes small, so that the refrigerant | coolant circuit in which the setting air volume is controlled to a large value is controlled (it is throttled).

  Further, the refrigerant pressures discharged from the compressors 21a to 21d detected by the respective discharge pressure sensors 32a to 32d are lower as the refrigerant circuit is controlled to have a larger set air volume.

  Based on the relationship between the detection value of each sensor and the target superheat degree, it is possible to grasp whether or not an incorrect wiring of the electric wiring has occurred.

  For example, as shown in FIG. 2, when the indoor control unit 74 a to which the control instruction is sent from the centralized controller 71 so that the set air volume becomes 100% of the maximum value is erroneously connected to the outdoor control unit 72 b Therefore, the detected pressure of the discharge pressure sensor 32b grasped by the outdoor control unit 72b does not become the lowest value.

  Here, when an erroneous wiring has occurred, the content output to the output unit 71y of the centralized controller 71 is the same as that in the first embodiment, and the point that the trial run is stopped is also the same as in the first embodiment. .

  When it is determined that the connection state of the electrical wiring is appropriate, the control unit 70 continues the superheat degree constant control in each of the refrigerant systems A to D, and shifts to the refrigerant charging amount determination process.

(7-1-3) Open / Close Valve Open State Determination Processing This open / close valve open state determination processing is the same as in the first embodiment, and may be performed simultaneously with the wiring connection state determination processing. The wiring connection state determination process may be performed before the wiring connection state determination process is started or after the wiring connection state determination process is completed.

(7-1-4) Refrigerant Charging Amount Determination Processing The contents of the refrigerant charging amount determination processing are the same as those in the first embodiment.

(7-2) Characteristic of 7th Embodiment In the trial operation method of the air conditioning system 1 of 7th Embodiment, in the control of each outdoor fan 25a-25d for every refrigerant | coolant system | strain, it controls so that a setting air volume differs.

  And the control part 70 performs the determination process of a wiring connection state by comparing the order of the detection value of each sensor, and the order of the magnitude | size of setting air volume, and judges the presence or absence of miswiring, and specifies it. Is able to.

  In addition, the refrigerant filling amount determination process can be simultaneously performed for all the refrigerant systems A to D, instead of performing the refrigerant filling amount determination process by shifting the time zone for each of the refrigerant systems A to D, and wiring. Since the process waits until the refrigerant circuits 10a to 10d are in a stable state during the connection state determination process, the refrigerant charge amount determination process is started immediately after confirming that no miswiring has occurred. Thus, the entire test operation of the air conditioning system 1 can be completed earlier.

<Eighth Embodiment>
Hereinafter, from the eighth embodiment to the eleventh embodiment, an air conditioning system including a refrigerant system in which a refrigerant circuit having a branch portion (parallel connection portion) is provided in a plurality of refrigerant systems. Will be described as an example.

  The air conditioning system 101 of 8th Embodiment is provided with the refrigerant | coolant system | strain A and the refrigerant | coolant system | strain E, as shown in FIG. Here, in the present embodiment, the same components as those in the first embodiment are denoted by the same member numbers, and detailed description thereof is omitted.

  In this air conditioning system 101, remote controllers 64, 65, 66, and 67 are connected to each indoor unit, and a centralized management controller 50 is connected to the outdoor unit.

  The refrigerant system A is similar to the contents described in the first embodiment, and is provided with a refrigerant circuit 10a in which the outdoor unit 2a and the indoor unit 4 are connected on a one-to-one basis. Specifically, the gas communication pipe extending from the outdoor side gas pipe closing valve 26a extends to and connects to the indoor side gas pipe closing valve 28a of the indoor unit. The liquid communication pipe extending from the outdoor liquid pipe closing valve 27a extends to and connects to the indoor side liquid pipe closing valve 29a of the indoor unit. As shown in FIG. 8, the outdoor control unit 72a of the refrigerant system A is communicably connected to the indoor control unit 74a when the electrical wiring is appropriately connected. In addition, the remote control 64 that performs setting input and control of the operating state of the refrigerant system A is connected to the indoor control unit 74a through electric wiring. About the outdoor control part 72a, it connects to the outdoor control part 72b of the refrigerant | coolant system | strain E which is another refrigerant system through an electrical wiring. The remote control 64 is provided with a receiving unit 64x that receives input of setting conditions from the user and a display unit 64y that performs various displays.

  The refrigerant system E is provided with a refrigerant circuit 10e in which a plurality of indoor units (indoor units 5, 6, 7) are connected to the outdoor unit 2b so as to be in parallel with the refrigerant flow. ing. Specifically, the gas communication pipe extending from the outdoor gas pipe closing valve 26b branches so as to correspond to each of the plurality of indoor units, and extends to each indoor side gas pipe closing valve 28b, 28c, 28d, respectively. is doing. The liquid communication pipe extending from the outdoor liquid pipe closing valve 27b branches to correspond to each of the plurality of indoor units, and extends to and connects to the indoor side liquid pipe closing valves 29b, 29c, and 29d.

  These indoor units 5, 6, and 7 are each installed near the ceiling of the target air-conditioned space, and harmonize the air of the target air-conditioned space. Here, an example is shown in which the indoor units 5, 6, and 7 are installed in separate conditioned spaces, but there is no particular limitation, and the indoor units 5, 6, and 7 are installed in the same conditioned space. It may be. The indoor units 5, 6, and 7 that belong to the refrigerant system E are different from the indoor units 4 that belong to the refrigerant system A in the installed air conditioning space. During normal operation, the indoor units 5, 6, 7 of the air conditioning system 101 correspond to the difference between the temperature of each air-conditioned space or installation location and the set temperature of each indoor unit 5, 6, 7. Individual capacity control can be performed by individually controlling the corresponding indoor expansion valves 43b, 43c, and 43d.

  As shown in FIG. 8, the outdoor control unit 72b of the refrigerant system E is communicably connected to the indoor control unit 74b when electrical wiring is appropriately connected. In addition, the remote control 65 which performs the setting input and control of the operating state of the refrigerant | coolant system | strain E is connected to this indoor control part 74b through an electrical wiring. The remote controller 65 is provided with a receiving unit 65x that receives input of setting conditions from the user and a display unit 65y that performs various displays. Similarly, a remote controller 66 having a reception unit 66x and a display unit 66y is connected to the indoor control unit 74c, and a remote control 67 having a reception unit 67x and a display unit 67y is connected to the indoor control unit 74d. The indoor control unit 74b and the indoor control unit 74c are connected through electric wiring, and the indoor control unit 74c is further connected to the indoor control unit 74d through electric wiring. Thereby, the indoor control units 74b, 74c, 74d belonging to the refrigerant system E can communicate with each other. The outdoor control unit 72b is connected to the outdoor control unit 72a of the refrigerant system A, which is another refrigerant system, through electric wiring, and is connected to a centralized management controller 50 that manages and controls the entire air conditioning system 101. ing. The central management controller 50 includes a receiving unit 50x that receives a command for controlling each component of the air conditioning system 101, a command for starting a test operation, and the like, and a warning display when a predetermined operation state or abnormality occurs And a display unit 50y for performing the above.

  Here, after the refrigerant piping is properly connected in the refrigerant system E, if the connection work of the electrical wiring is inappropriate and a connection error occurs, for example, as shown in FIG. The controller 72b may be connected to the indoor controller 74a, and the outdoor controller 72a may be connected to the indoor controller 74b.

  In the trial operation of the air conditioning system 101, an operation for identifying the erroneous wiring as described above is performed.

  The trial operation performed for the air conditioning system 101 is not particularly limited, and an attempt is made to grasp an electrical wiring connection error by performing the trial operation of any of the first to seventh embodiments described above. Specifically, when the central management controller 50 described above receives a command to start a trial run, the trial run is started.

  Here, when a connection error occurs as shown in FIG. 9, for example, when a test operation is performed in the same manner as in the first embodiment, the start timing is delayed after the compressor 21 a of the refrigerant system A starts the operation. Thus, the compressor 21b of the refrigerant system E starts operation. As a result, when it is confirmed that the detection value of the indoor liquid side temperature sensor 38a is lowered first and the detection values of the indoor liquid side temperature sensors 38b, 38c, and 38d are delayed, It is possible to confirm that there is no connection error and that the connection is appropriate. On the other hand, after the compressor 21a of the refrigerant system A starts operation, the start timing is delayed and the compressor 21b of the refrigerant system E starts operation, but the indoor liquid side temperature sensors 38b and 38c are started. When it is confirmed that the decrease in the detection value of 38d occurs first and the decrease in the detection value in the indoor liquid side temperature sensor 38a is delayed, it is possible to grasp that an electrical wiring connection error has occurred. it can. In addition, each trial run of other Embodiment 2-7 can be applied to the air-conditioning system 101 similarly.

  Here, for example, when the indoor units 5, 6, and 7 are installed in the same target space, or when the load conditions of the indoor units 5, 6, and 7 are the same, the trial operation is started. Even when the detected values in the indoor liquid side temperature sensors 38b, 38c, and 38d belonging to the refrigerant system E of the air conditioning system 101 are the same and are different from the values of the indoor liquid side temperature sensor 38a, a connection error occurs. Therefore, it can be confirmed that an appropriate connection state is secured.

  Further, for example, in the air conditioning system 101, as shown in FIG. 10, the connection error between the indoor control unit and the outdoor control unit does not occur as shown in FIG. 10, and the indoor units 4, 5, 6, 7 Even when a connection error occurs on the side, confirmation can be performed by the trial runs of the first to seventh embodiments. For example, when the trial operation in the first embodiment is performed, after the compressor 21a of the refrigerant system A starts operation, the start timing is delayed and the compressor 21b of the refrigerant system E starts operation. The detection value of the liquid side temperature sensor 38a first decreases, the detection values of the indoor liquid side temperature sensors 38b and 38c decrease, and the detection value of the indoor liquid side temperature sensor 38d belongs to the same refrigerant system E. When the detected values of the indoor liquid side temperature sensors 38b, 38c are different from the detected values and behavior, and the detected values of the indoor liquid side temperature sensors 38a belonging to other refrigerant systems A are different from the detected values. Can identify that the command to the refrigerant system A is erroneously sent to the indoor control unit 74d, and can grasp the connection error. In addition, it can apply to grasping | ascertaining of the connection error in the aspect of FIG.

<Ninth Embodiment>
The air conditioning system 201 of 9th Embodiment is provided with the refrigerant | coolant system | strain F and the refrigerant | coolant system | strain G, as shown in FIG. Here, in the present embodiment, the same components as those in the first embodiment are denoted by the same member numbers, and detailed description thereof is omitted.

  Here, the refrigerant system F is the same as the refrigerant system A of the eighth embodiment except that the refrigerant circuit 10f is provided and the indoor expansion valve 43a is not provided.

  The refrigerant system G is the same as the refrigerant system E of the eighth embodiment except that the refrigerant circuit 10g is provided and the indoor expansion valves 43b, 43c, and 43d are not provided.

  In this case, for example, as shown in FIG. 12, the outdoor control unit 72b is connected to the indoor control unit 74a, and the outdoor control unit 72a is connected to the indoor control unit 74b, resulting in a connection error. In the same manner as in the eighth embodiment, the connection error can be grasped by performing the test operation of any one of the first to seventh embodiments.

<Tenth Embodiment>
As shown in FIG. 13, the air conditioning system 301 of the tenth embodiment includes a refrigerant system A and a refrigerant system H. Here, in the present embodiment, the same components as those in the first embodiment are denoted by the same member numbers, and detailed description thereof is omitted.

  Here, the refrigerant system A is the same as the refrigerant system A of the eighth embodiment.

  For the refrigerant system H, a refrigerant circuit 10h is connected to the indoor unit 5 so that a plurality of outdoor units (outdoor units 2b, 2c, 2d) are in parallel relation to the refrigerant flow. Is provided. Specifically, the gas communication pipe extending from the indoor side gas pipe closing valve 28b branches so as to correspond to each of the plurality of outdoor units, and extends to the outdoor side gas pipe closing valves 26b, 26c, 26d, respectively. is doing. The liquid communication pipe extending from the indoor side liquid pipe closing valve 29b branches to correspond to each of the plurality of outdoor units, and extends to and connects to the outdoor liquid pipe closing valves 27b, 27c, 27d. The indoor unit 5 belonging to the refrigerant system H is different from the indoor unit 4 belonging to the refrigerant system A in the installed air conditioning space.

  As shown in FIG. 13, the indoor control unit 74b of the refrigerant system H is communicably connected to the outdoor control unit 72b when electrical wiring is appropriately connected. In addition, the remote control 65 that performs setting input and control of the operating state of the refrigerant system H is connected to the indoor control unit 74b through electric wiring. The remote controller 65 is provided with a receiving unit 65x that receives input of setting conditions from the user and a display unit 65y that performs various displays. The outdoor control unit 72b is connected to the outdoor control unit 72a of the refrigerant system A, which is another refrigerant system, through electric wiring, and is connected to the outdoor control unit 72c through electric wiring. The outdoor control unit 72c is connected to the outdoor control unit 72d through electric wiring. The outdoor control unit 72d is connected to a centralized management controller 50 that manages and controls the entire air conditioning system 301. The central management controller 50 includes a receiving unit 50x that receives a command for controlling each component of the air conditioning system 301, a command for starting a test operation, and the like, and a warning display when a predetermined operation state or abnormality occurs And a display unit 50y for performing the above.

  Here, after the refrigerant pipes are properly connected in the refrigerant system H, if the connection work of the electrical wiring is inappropriate and a connection error occurs, for example, as shown in FIG. The controller 72b may be connected to the indoor controller 74a, and the outdoor controller 72a may be connected to the indoor controller 74b.

  Even in this case, the connection error can be grasped by performing the trial run of each of the first to seventh embodiments in the same manner as in the above-described eighth and ninth embodiments.

  The trial operation method of the air conditioning system of the present invention is particularly useful when used for checking the connection state of the electrical wiring to the refrigerant system in a short time, for example.

1 Air-conditioning system 21a-21d Compressor (compression mechanism)
23a-23d Outdoor heat exchanger (heat source side heat exchanger)
24a-24d Outdoor expansion valve (expansion mechanism)
41a-41d Indoor heat exchanger (use side heat exchanger)
43a-43d Indoor expansion valve (expansion mechanism)
A to D Refrigerant system

Japanese Patent Publication No. 07-065792

Claims (8)

The compression mechanism (21a to 21d), the heat source side heat exchanger (23a to 23d), the expansion mechanism (43a to 43d, 24a to 24d), and the use side heat exchanger (41a to 41d) are connected so that the refrigerant circulates. It is a trial run method of an air-conditioning system (1) which has two or more refrigerant systems (AD) constituted,
A first step of performing a different test run for each refrigerant system;
A second step of determining suitability of a connection state for each refrigerant system based on a difference in predetermined physical quantity or a difference corresponding to each refrigerant system generated by performing a different test operation for each refrigerant system;
With
Providing a time zone in which the different trial runs simultaneously for each refrigerant system;
How to test the air conditioning system. The trial operation different for each refrigerant system is to change the operation start timing of the compression mechanism for each refrigerant system.
The trial operation method of the air conditioning system of Claim 1. The trial operation different for each refrigerant system is to change the operation load of the compression mechanism for each refrigerant system.
The trial operation method of the air conditioning system of Claim 1 or 2. The different trial operation for each refrigerant system is to change the valve opening of the expansion mechanism for each refrigerant system.
The trial operation method of the air conditioning system of any one of Claim 1 to 3. The trial operation different for each refrigerant system is to change the operation stop timing of the compression mechanism for each refrigerant system.
The trial operation method of the air-conditioning system of any one of Claim 1 to 4. Fans for sending an air flow to the heat source side heat exchanger are provided for each refrigerant system,
The trial operation different for each refrigerant system is to change the air volume of the fan for each refrigerant system.
The trial operation method of the air conditioning system of any one of Claim 1 to 5. Further comprising a third step of circulating a refrigerant for each refrigerant system by performing a different test operation for each refrigerant system to enable determination of whether or not the refrigerant charge amount for each refrigerant system is appropriate,
The process of waiting until the state of determination of the suitability of the refrigerant charge amount for each refrigerant system is possible is provided for a time zone in which the process proceeds simultaneously for each refrigerant system,
The trial operation method of the air-conditioning system of any one of Claim 1 to 6. At least one refrigerant system of the plurality of refrigerant systems is
A plurality of the use side heat exchangers are configured to be connected in parallel to the refrigerant circulation flow, or
A plurality of the compression mechanism and the heat source side heat exchanger are configured to be connected in parallel to the refrigerant circulation flow.
The trial operation method of the air conditioning system of any one of Claim 1 to 7.

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