JP2017096529A - Control device, air conditioning system including the same, control method and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain amenity according to an installation environment even in a case of executing energy-saving control.SOLUTION: A control device includes: a selection unit 102 configured to select one energy-saving operation control according to an energy-saving instruction, among energy-saving operation control in which degree of suppressing operation capacity is set in multistage; a priority setting unit 103 configured to set the priority of an indoor machine with high importance of an installation environment higher than that of an indoor machine with low importance thereof; and a control unit 104 configured to select an indoor machine configured to suppress operation capacity determined according to the selected energy-saving operation control in order from a low-priority indoor machine, and control the selected indoor machine with the energy-saving operation control.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a control device, an air conditioning system including the control device, a control method, and a control program.

For example, a building multi-air conditioner is connected to a plurality of indoor units and is operated for each indoor unit. In recent years, multi-air conditioners for buildings have increased in capacity, and the number of indoor units connected to one refrigerant system has increased to about several tens. In advancing energy saving studies, it is necessary not only to uniformly control the entire refrigerant system, but also to consider the operating status of each indoor unit.
Patent Document 1 below discloses that the priority is increased as the difference between the set temperature of the indoor unit and the suction temperature increases, and the room temperature is maintained at a temperature close to the set temperature.

JP 2008-249264 A

  However, the environment in which the indoor unit is installed is diverse, and it is not desirable to limit the air conditioning capacity in a room such as a room with a large air conditioning load or a guest room for energy saving, but the method of Patent Document 1 above is not desirable. However, since it is controlled based on the difference between the set temperature of the indoor unit and the suction temperature, there is a problem that the air conditioning is restricted regardless of the installation environment and the comfort is impaired.

  The present invention has been made in view of such circumstances, and even when energy saving control is performed, a control device that can maintain comfort according to the installation environment, an air conditioning system including the control device, and a control method An object is to provide a control program.

In order to solve the above problems, the present invention employs the following means.
The present invention is a control device for an air conditioner having a plurality of indoor units, and the energy-saving operation control according to the energy-saving command among the energy-saving operation controls in which the degree of suppressing the operation capacity is set in multiple stages. The selection unit to be selected and the indoor unit having a high importance of the installation environment are determined according to the priority setting unit for setting a higher priority than the indoor unit having the low importance and the selected energy saving operation control. A control device comprising: control means for selecting the indoor units that suppress the operation capability to be performed in order from the indoor units set with a low priority, and controlling the selected indoor units by the energy-saving operation control. provide.

According to the present invention, one energy-saving operation control according to the energy-saving command is selected from among the energy-saving operation controls in which the degree of suppressing the driving ability is set in multiple stages, and the operation determined according to the selected energy-saving operation control The indoor units that suppress the capacity are selected in order from the indoor unit with the lower installation environment importance than the indoor unit with the higher installation environment importance, and the selected indoor units are controlled by energy-saving operation control according to the energy-saving directive. The Here, the priority is a degree of giving priority to control for maintaining comfort over energy saving control.
The indoor units that are selected in order from the indoor unit with the lowest priority are selected for the energy-saving operation control, and the selected indoor unit is controlled to reduce its operating capacity. By setting a high priority as an indoor unit for which energy-saving operation control is to be delayed, it is possible to reduce as much as possible the impact on comfort caused by energy saving.
An indoor unit with a high degree of importance of the installation environment is, for example, an indoor unit installed in an environment where it is not desired to reduce the operating capacity (air conditioning capacity) for energy saving, such as a room with a large air conditioning load or a guest room. is there.

  The control device includes a calculation unit that calculates a rate of increase / decrease based on a target power value determined based on the energy saving command and a current power value, and the selection unit includes the rate of increase / decrease and the current air The energy saving operation control may be selected based on an operation parameter indicating an operation state of the harmony device.

  For example, it is conceivable to increase the low-pressure pressure as one of the means for energy saving control, but if the rotation speed of the compressor is reduced to the lower limit value, the compressor rotation speed can be increased only by increasing the low-pressure pressure. May not lead to energy saving. Therefore, it is possible to select a control that reliably saves energy by taking into consideration the operating state of the air conditioner (for example, the rotational speed of the compressor).

  The selection unit of the control device may set the energy saving operation control for each predetermined rotation speed range set to the rotation speed of the compressor of the outdoor unit.

  Thereby, the setting of energy-saving operation control can be set finely, and the sensitivity with respect to power consumption can be set finely.

  The priority setting means of the control device may set the priority to the indoor unit at predetermined intervals.

  At the beginning of control, indoor units with a large load do not perform energy-saving control (capacity maintenance), and indoor units with a small load perform energy-saving control (capacity suppression). However, energy-saving control is performed with time. The air conditioning target area where there is no air conditioning gradually approaches the set temperature, and the air conditioning target area where the energy saving control is performed gradually moves away from the set temperature. Therefore, after a predetermined time has elapsed from the start of control, the air-conditioning target area that has not been subjected to energy-saving control at the beginning of control is lowered in priority due to approaching the set temperature, and the air-conditioning target for which energy-saving control has been performed. The area is given priority by deviating from the set temperature. That is, since the priority of the indoor unit is changed, the indoor unit to be selected as the indoor unit that suppresses the driving capability is also updated. In this way, by setting the priority of the indoor unit at predetermined intervals, the indoor unit to be selected as the indoor unit that suppresses the driving ability is rotated, and the impact on comfort is as much as possible. It is suppressed and comfort can be continued.

  The present invention provides an air conditioning system including any one of the control devices described above, an indoor unit, and an outdoor unit.

  The present invention is a control method for an air conditioner having a plurality of indoor units, and the energy-saving operation control according to an energy-saving command among the energy-saving operation controls in which the degree of suppressing the operation capacity is set in multiple stages. The first step to be selected, the indoor unit having a high importance of the installation environment is determined according to the second step of setting a higher priority than the indoor unit having the low importance and the selected energy saving operation control A control method comprising: a third step of selecting the indoor unit that suppresses the operation capability to be performed in order from the indoor unit set with a low priority, and controlling the selected indoor unit by the energy-saving operation control. To do.

  The present invention is a control program for an air conditioner having a plurality of indoor units, and the energy-saving operation control according to an energy-saving command among the energy-saving operation controls in which the degree of suppressing the operation capacity is set in multiple stages. The first process to be selected and the indoor unit having a high importance of the installation environment are determined according to the second process to set a higher priority than the indoor unit having the low importance and the selected energy saving operation control. In order to cause the computer to execute the third process in which the indoor units that suppress the operation capability to be performed are selected in order from the indoor units set with a low priority, and the selected indoor units are controlled by the energy-saving operation control. Provide a control program.

  Even if energy saving control is performed, the present invention has an effect that comfort can be maintained according to the installation environment.

It is the figure which showed roughly the structure of the air conditioning system which concerns on one Embodiment of this invention. It is a functional block diagram of the energy-saving control apparatus of the air conditioning system which concerns on one Embodiment of this invention. It is an example of the 1st correspondence information which shows energy saving operation control according to a level and a level. It is a figure for demonstrating the next level determination in an outdoor side controller. The schematic of the electric power map according to energy-saving operation control level is shown. It is an example of the relationship between the low pressure set for every rotation speed of the compressor at the time of cooling operation, and a high pressure. It is an operation | movement flow of the priority setting of the energy-saving control apparatus which concerns on one Embodiment of this invention.

Hereinafter, a control device, an air conditioning system including the control device, a control method, and a control program according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a refrigerant circuit diagram of an air conditioning system 1 according to the present embodiment.
As shown in FIG. 1, the air conditioning system 1 includes an outdoor unit 2 and a plurality of indoor units 3A and 3B, and constitutes a refrigeration cycle (refrigerant system) 7. In the present embodiment, the case of a multi-type air conditioning system having two indoor units will be described as an example. However, the present invention is not limited to this, and one indoor unit is connected to one outdoor unit. May be an air conditioning system or three or more indoor units. In addition, when not distinguishing an indoor unit below, it describes as the indoor unit 3.
The indoor units 3A and 3B are connected in parallel to each other via a branching device 6 between a gas side pipe 4 and a liquid side pipe 5 led out from the outdoor unit 2.

  The outdoor unit 2 heats an inverter-driven compressor 10 that compresses refrigerant, an oil separator 11 that separates lubricating oil from refrigerant gas, a four-way switching valve 12 that switches the circulation direction of refrigerant, and refrigerant and outside air. The outdoor heat exchanger 13 to be exchanged, the supercooling coil 14 configured integrally with the outdoor heat exchanger 13, the heating expansion valve (EEVH) 15, the receiver 16 storing the liquid refrigerant, and the liquid refrigerant A subcooling heat exchanger 17 that provides supercooling, a supercooling expansion valve (EEVSC) 18 that controls the amount of refrigerant that is diverted to the subcooling heat exchanger 17, and a liquid component from the refrigerant gas that is drawn into the compressor 10. And an accumulator 19 for sucking only the gas component to the compressor 10 side, a gas side operation valve 20, and a liquid side operation valve 21.

  The compressor 10 compresses the low-temperature and low-pressure gas refrigerant from the outdoor heat exchanger 13 to produce a high-temperature and high-pressure gas refrigerant, and a scroll compressor may be used. A low pressure sensor 51 is provided in the refrigerant system on the suction side of the compressor 10, and a high pressure sensor 52 is provided in the refrigerant system on the discharge side. The outputs of the pressure sensors 51 and 52 are output to the outdoor controller 27 of the outdoor unit 2.

  Each said apparatus by the side of the outdoor unit 2 is connected as is well-known via the refrigerant | coolant piping 22, and comprises the outdoor side refrigerant circuit 23. FIG. The outdoor unit 2 is provided with an outdoor fan 25 that is driven by a DC fan motor 24 and vents outside air to the outdoor heat exchanger 13, and an oil separator 11 and a suction pipe of the compressor 10. In the meantime, an oil return circuit 26 for returning the lubricating oil separated from the discharged refrigerant gas in the oil separator 11 to the compressor 10 side by a predetermined amount is provided. Furthermore, the outdoor unit 2 is provided with an outdoor controller 27 (details will be described later).

  The gas side pipe 4 and the liquid side pipe 5 are refrigerant pipes connected to the gas side operation valve 20 and the liquid side operation valve 21 of the outdoor unit 2, and are connected to the outdoor unit 2 and to it during installation on site. The pipe length is set according to the distance between the plurality of indoor units 3A and 3B. An appropriate number of branching devices 6 are provided in the middle of the gas side piping 4 and the liquid side piping 5, and an appropriate number of indoor units 3 </ b> A and 3 </ b> B are connected via the branching devices 6. Thereby, one sealed refrigeration cycle (refrigerant circuit) 7 is configured.

The indoor units 3A and 3B are driven by an indoor heat exchanger 30 that exchanges heat between indoor air and a refrigerant for indoor air conditioning, an expansion valve (EEVC) 31 for cooling, and a DC fan motor 32. And an indoor fan 33 that circulates the room air through 30 and is connected to the branching device 6 through the branch gas side pipes 4A and 4B and the branch liquid side pipes 5A and 5B on the indoor side. The indoor units 3A and 3B are provided with an indoor controller 34 (details will be described later) for controlling a cooling expansion valve (EEVC) 31, a DC fan motor 32 for the indoor fan 33, and the like. The indoor controller 34 is connected to the outdoor controller 27.
The indoor controller 34 includes, for example, a microcomputer and controls the refrigeration cycle 7 based on each sensor in the refrigeration cycle 7 and data from the outdoor controller 27.

  The outdoor controller 27 includes, for example, a microcomputer, a volatile memory, a nonvolatile memory, and the like, and includes a compressor 10, a four-way switching valve 12, a heating expansion valve (EEVH) 15, and a supercooling expansion valve (EEVSC) 18. The DC fan motor 24 for the outdoor fan 25 is controlled. For example, the outdoor controller 27 controls the start / stop of the compressor 10 or the number of rotations thereof based on various commands sent from the indoor controller 34, the indoor intake air temperature, the set indoor temperature, etc. Is adjusted to control the indoor air temperature and perform oil return control and the like. Further, the microcomputer realizes various functions by causing the CPU to read and execute the program recorded in the auxiliary storage device to the main storage device.

  The outdoor controller 27 includes an energy saving control unit (control device) 100. In the energy saving control unit 100, energy saving operation control (control items) selected in accordance with the degree of energy saving is set in multiple stages, and the indoor unit 3 to be subjected to energy-suppressing operation in the energy saving operation control according to the energy saving command. To be carried out. Hereinafter, (1) selecting energy-saving operation control and (2) setting priority for determining an indoor unit to be subjected to energy suppression operation will be described in order.

  Specifically, as shown in FIG. 2, the energy saving control unit 100 includes a calculation unit (calculation unit) 101, a selection unit (selection unit) 102, a priority setting unit (priority setting unit) 103, and a control. Unit (control means) 104.

[Select energy-saving operation control]
FIG. 3 shows an example of first correspondence information in which the degree (level) of energy saving is associated with the energy saving operation control according to the level. In this embodiment, level 0 to level 4 are set.
For example, level 0 is an original, that is, control according to an instruction from a remote controller or the like without applying the restraining operation for energy saving. Level 1 has a higher level of energy saving than level 0, and adjusts the fan air volume of indoor unit 3. That is, if the fan air volume of the indoor unit 3 is adjusted and reduced, the amount of exchange heat is reduced, so the capacity required for the outdoor unit 2 is reduced and the rotational speed of the compressor 10 is reduced, resulting in energy saving. .

Level 2 has a higher degree of energy saving than Level 1, and adjusts the opening degree of the electronic expansion valve (cooling expansion valve (EEVC) 31) of the indoor unit 3. That is, if the electronic expansion valve opening degree of the indoor unit 3 is adjusted and the electronic expansion valve is throttled to reduce the refrigerant circulation rate, the rotational speed of the compressor 10 of the outdoor unit 2 decreases, resulting in energy saving.
Level 3 has a higher level of energy saving than Level 2, and adjusts the thermo-ON of indoor unit 3. That is, the capacity is reduced without closing the electronic expansion valve and circulating the refrigerant. At this time, the air volume fan of the indoor unit 3 is turned on.

Level 4 has a higher degree of energy saving than level 3, and stops the operation of indoor unit 3 to reduce the capacity. At this time, the air volume fan of the indoor unit 3 is turned off.
The energy-saving operation control may be selected so as to maintain the target power Wt or less at the last minute. As a result, it is possible to prevent excessive energy suppression operation and maintain comfort.

The energy-saving operation control divided into multiple levels in this way is selected according to the following procedure.
FIG. 4 is a diagram for explaining the next level determination in the outdoor side controller 27 of the outdoor unit 2. When the energy saving control unit 100 of the outdoor controller 27 acquires the information on the target power Wt, the energy saving control unit 100 based on the current power W, information on various operating points, and the currently selected energy saving operation control execution level. Next, the level to be executed next is determined from the power map.

  When the target power Wt is smaller than the current power W, the next time the control is performed to increase the implementation level (that is, the energy is suppressed from the current level). When the target power Wt is larger than the current power W, the next time Is controlled in the direction of lowering the execution level (that is, the energy suppression is relaxed from the present level). Selection of such a level is performed as follows by each unit included in the energy saving control unit 100.

The calculation unit 101 calculates and outputs the increase / decrease rate α according to the following equation (1) based on the target power value Wt determined based on the energy saving command and the current power value W.
Increase / decrease rate α = (target power value Wt−current power W) / current power W (1)

  The selection unit 102 selects one energy-saving operation control according to the energy-saving command among the energy-saving operation controls in which the degree of suppressing the driving ability is set in multiple stages. Specifically, the energy saving operation control (level) to be executed next time is selected in consideration of the increase / decrease rate α obtained by the above equation (1) and the operation parameter indicating the current operation state of the air conditioner. . The operation parameter is information on the operation point such as the current rotational speed [rps] of the compressor 10, the high pressure HP, the low pressure LP, and the type of operation such as cooling and heating.

Here, the reason for considering not only the increase / decrease rate α but also the operating point will be described.
For example, it is conceivable that the low pressure LP is increased as one of the means for energy saving control. If the rotation speed of the compressor 10 is reduced to the lower limit value, the compression is further increased only by increasing the low pressure LP. Since the machine speed does not decrease, it may not lead to energy saving. Therefore, in the present embodiment, it is possible to select a control that reliably saves energy by taking into account the current operating point of the air conditioning system 1 (for example, cooling / heating, the rotational speed of the compressor, etc.).

FIG. 5 shows a schematic diagram of an electric power map for each energy-saving operation control level.
The rate of change in power when the level is changed based on the current operating point including information on cooling / heating, compressor speed [rps], high pressure HP, low pressure LP, etc., and the current energy-saving operation control level Those satisfying (the increase / decrease rate α) are employed. Moreover, in order to maintain comfort, it is also necessary to return the level as appropriate (that is, to reduce the energy saving level).
More specifically, as shown in FIG. 6, the power map may be obtained by mapping operating point information for each rotation speed of the compressor 10.

  FIG. 6 shows an example of the relationship between the low pressure LP and the high pressure HP set for each rotation speed of the compressor 10 during the cooling operation. For example, if the current rotational speed of the compressor 10 is 30 [rps], a graph indicated by reference numeral 60 in FIG. 6 is selected, and a diagram as shown in the lower left portion of the page of FIG. 6 is obtained. As indicated by reference numeral 61 in FIG. 6, each region is divided into areas in the relationship between the low pressure LP and the high pressure HP.

For example, when the low pressure LP of the current compressor 10 is 0.7 and the high pressure is 2.1, attention is paid to the thick frame portion. As shown in the right side of the drawing in FIG. 6 (see reference numeral 62), the thick frame portion is set with level information based on the current time set in the thick frame region, and the relative increase / decrease rate for each level. Is mapped. The next implementation level is determined from a comparison between the increase / decrease rate α obtained by the equation (1) and the ± XX information of the map denoted by reference numeral 62.
Thus, paying attention to the fact that the sensitivity to power consumption fluctuates, the next level according to the energy saving command is selected using the power map determined for each rotation speed of the compressor 10, and the energy saving operation control is performed. Is selected.

[Set indoor unit priority]
When the level of the energy saving operation control is determined as described above, the indoor unit 3 to be subjected to the energy saving operation control according to the determined level is selected according to the priority. Below, the setting of the priority of the indoor unit 3 will be described.
The priority setting unit 103 sets a higher priority for the indoor unit 3 having a high importance of the installation environment than the indoor unit 3 having a low importance. Here, the priority is a degree of giving priority to control for maintaining comfort over energy saving control.

  The priority is not set according to only the importance of the installation environment, but is set according to the operating state of the indoor unit 3, the indoor state, the air conditioning load, the customer request, and the like. Among these, since the operating state, the air conditioning load, and the like are items that change with time, the priority may be changed (updated) as time passes. For example, the priority setting unit 103 sets the priority to the indoor unit 3 at predetermined intervals (for example, 3 minutes) while acquiring the energy saving command based on the target power Wt.

The operation state of the indoor unit 3 is set such that, for example, (1) the indoor unit being operated has a higher priority than the stopped indoor unit, and (2) the priority is set in the order of air-conditioning operation>dehumidification> air blowing. (3) The indoor unit that is thermo-ON is preferably set to have a higher priority than the indoor unit that is thermo-OFF.
As for the indoor situation, for example, the priority is set according to the position of the room, the presence / absence of a window, the size of the window, the presence / absence of ventilation, and the like. As for the position of the room, the amount of solar radiation varies depending on the direction, so in the case of cooling operation, the south room has higher priority (comfort) than the north room, and the comfort of the south room is increased. The energy-saving operation control is preferentially performed on the north side over the south side so that it is maintained.

In the case of heating operation, the north room has a higher priority than the south room, and in the case of energy-saving operation control, the south room has priority over the north room. The
Moreover, it is good to change a priority also according to piping length or the floor of a building. The ventilation may be ventilation provided in the indoor unit 3 or ventilation provided separately from the air conditioning system 1.

The air conditioning load is preferably set to have a higher priority as the difference between the set temperature and the room temperature increases. In addition, the air conditioning load varies according to, for example, the ratio of thermo-on and thermo-off, remote control operation history, comfort index, and the like, and the priority may be varied according to these.
The customer requests have different priorities according to, for example, the use of the room, timer management, season / time / weather. The usage of the room is a room where the importance of the installation environment such as the guest room, the president's room, the special room, etc. is high.

Here, a priority setting method will be described with reference to FIG. Moreover, in the following description, the case where the cooling operation is being performed will be described as an example.
When the priority setting flow is started, it is determined whether or not each indoor unit 3 is in a thermo-on operation (that is, required frequency> 0) (step SA1 in FIG. 7). If the thermo-on operation is not being performed (No in step SA1 in FIG. 7), the energy-saving control is not performed, and the process returns to step SA1 (step SA2 in FIG. 7).

  If it is determined that the thermo-on operation is being performed (Yes in step SA1 in FIG. 7), it is determined whether the indoor unit 3 has a highly important installation environment such as a room with a large air conditioning load or a special room. (Step SA3 in FIG. 7). If the indoor unit 3 has a high importance installation environment (Yes in step SA3 in FIG. 7), the priority is set to the highest Pmax (step SA4 in FIG. 7), and the process proceeds to step SA10.

  If the indoor unit 3 is not a highly important installation environment (No in step SA3 in FIG. 7), during cooling operation, if the room temperature is lower than the predetermined room temperature and sufficiently low, the priority is given. Is set to the lowest Pmin. If the room temperature is higher than the predetermined temperature by a predetermined temperature and is very high, it is set to P (max-1), which is one step lower than Pmax (see FIG. 7). Step SA5).

  It is determined whether or not the indoor unit 3 is immediately after activation (for example, within 15 minutes from the start of activation) (step SA6 in FIG. 7). If it is immediately after startup (Yes in step SA6 in FIG. 7), the priority is set to P (max-2) that is one step lower than P (max-1) (step SA7 in FIG. 7). On the other hand, if it is determined that it is not immediately after startup (No in step SA6 in FIG. 7), between P (max−2) and Pmin depending on the degree of air conditioning requirement such as the difference between the set temperature and room temperature. Priorities are set as appropriate (step SA8 in FIG. 7). The reason for determining whether or not it is immediately after the start-up is that the user is not satisfied with the temperature of the current installation environment immediately after the start-up of the indoor unit 3 and therefore takes into account the timing when the user desires to change the temperature. .

Priorities are appropriately set between P (max−2) and Pmin depending on the direction of the installation environment related to the solar radiation load (for example, north, south, etc.) and indoor conditions including the presence or absence of ventilation. Step SA9 in FIG. It is determined whether or not a predetermined time (for example, 3 minutes) has elapsed. If the predetermined time has not elapsed, this determination is repeated (No in step SA10 in FIG. 7), and if the predetermined time has elapsed (in FIG. 7). (Yes in step SA10), the priority information set for each indoor unit 3 is output (step SA11 in FIG. 7), and the process returns to step SA1.
As described above, while the energy saving command for the target power Wt is acquired, this processing is repeated, and the priority for maintaining the comfort of each indoor unit 3 is set and input to the control unit 104 or storage (not shown). Stored in the department.

  The reason why the priority is set repeatedly is that, at the beginning of the control, the indoor unit 3 with a large load does not perform the energy saving control (capacity maintenance), and the indoor unit 3 with a small load performs the energy saving control (capacity suppression). With the change over time, the room where the energy-saving control is not performed (the air-conditioning target area) gradually approaches the set temperature, and the room where the energy-saving control is performed gradually moves away from the set temperature.

Therefore, after a predetermined time has elapsed since the start of control, the room where energy-saving control was not performed at the beginning of the control is reduced in priority due to approaching the set temperature, and the room where energy-saving control was performed is set By deviating from the temperature, the priority is raised. That is, the indoor unit 3 to be selected as the indoor unit 3 that suppresses the driving ability is updated.
As described above, the priority of the indoor unit 3 is repeatedly set at every predetermined interval, so that the target indoor unit 3 to be selected as the indoor unit that suppresses the driving ability is rotated, which affects the comfort. It is suppressed as much as possible.

  The control unit 104 selects the indoor unit 3 that suppresses the driving ability determined according to the selected energy-saving operation control in order from the indoor unit 3 set with a low priority, and controls the selected indoor unit 3 with the energy-saving operation control. Control by.

Below, the effect | action of the energy-saving control part 100 is demonstrated.
When information on the target power Wt is acquired as an energy saving command, the increase / decrease rate α calculated from the target power Wt and the current power W, information on various operating points of each indoor unit 3, and current energy saving operation control (for example, The next energy saving operation control level (for example, level 2) is selected based on the power map and the energy saving operation control corresponding to level 1.

When the next energy saving operation control level (for example, level 2) is set, the energy saving operation control (for example, EEV opening adjustment of the indoor unit) corresponding to this level is read. In order to achieve the target power Wt by the read energy-saving operation control, indoor units to be subjected to energy-saving operation control are selected in order from the lowest priority.
The selected indoor unit 3 is subjected to energy saving operation control corresponding to the previously obtained next level (for example, level 2).

  Such energy-saving operation control is repeatedly performed while the energy-saving command by the target power Wt is obtained, and the priority information is updated at predetermined intervals to rotate the indoor unit 3 that is the target of energy-saving operation control. However, energy-saving operation control can be performed. Moreover, since the indoor unit 3 with a high importance installation environment is always set to a high priority, even if energy saving operation control is performed, the comfort of the high importance installation environment is not impaired. . Further, the energy saving operation control is performed for each refrigerant system.

  As described above, according to the air conditioning system 1 and the control device, the control method, and the control program according to the present embodiment, the indoor unit 3 set with a low priority as the indoor unit 3 that performs energy-saving operation control. Since the selected indoor units 3 are controlled in order, and the control to suppress the driving capacity is performed, the indoor unit 3 having a high installation environment importance is set to a high priority as an indoor unit for which energy-saving operation control is to be delayed. Thus, the highly important installation environment can reduce the influence on the comfort caused by the energy saving implementation as much as possible.

Moreover, since not only the increase / decrease rate α between the target power Wt of the energy saving command and the current power W but also the operating point of the air conditioning system 1 is taken into consideration, it is possible to select a control that reliably saves energy.
Moreover, since the electric power map determined for every rotation speed of the compressor 10 is set, the setting of the energy saving operation control can be set finely, and the sensitivity to the power consumption can be set finely.
In addition, the priority of the indoor unit is set at predetermined intervals, so that the indoor unit to be selected as the indoor unit that suppresses the driving ability is rotated, and the impact on comfort is as much as possible. It is suppressed and comfort can be continued.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included. For example, the priority setting in FIG. 7 has been described by taking the cooling operation as an example, but the priority can be set similarly in the heating operation. In step SA5, the room temperature is determined. In the heating operation, Pmin is set if the room temperature is sufficiently high, and P (max-1) is set if the room temperature is very low.

1 Air conditioning system 100 Energy saving control unit (control device)
101 Calculation unit 102 Selection unit 103 Priority setting unit 104 Control unit

Claims (7)

A control device for an air conditioner having a plurality of indoor units,
Among the energy-saving operation controls in which the degree to suppress the driving ability is set in multiple stages, a selection means for selecting one of the energy-saving operation controls according to the energy-saving command,
The indoor unit having a high importance of the installation environment has priority setting means for setting a higher priority than the indoor unit having the low importance,
The indoor unit that suppresses the driving ability determined according to the selected energy saving operation control is selected in order from the indoor unit set with the low priority, and the selected indoor unit is selected by the energy saving operation control. A control device comprising control means for controlling. A calculation means for calculating an increase / decrease rate based on a target power value determined based on the energy saving command and a current power value;
The control device according to claim 1, wherein the selection unit selects the energy-saving operation control based on the increase / decrease rate and an operation parameter indicating a current operation state of the air conditioner.   3. The control device according to claim 1, wherein the selection unit sets the energy-saving operation control for each predetermined rotation speed range set to the rotation speed of the compressor of the outdoor unit.   The control device according to any one of claims 1 to 3, wherein the priority setting means sets the priority to the indoor unit at predetermined intervals. A control device according to any one of claims 1 to 4,
Indoor unit,
Air conditioning system with outdoor unit. A control method for an air conditioner having a plurality of indoor units,
A first step of selecting one of the energy-saving operation controls according to an energy-saving command among the energy-saving operation controls in which the degree of suppressing the driving ability is set in multiple stages;
A second step of setting the priority of the indoor unit having a high importance of the installation environment higher than the indoor unit having the low importance;
The indoor units that suppress the driving ability determined according to the selected energy-saving operation control are selected in order from the indoor units set with a lower priority, and the selected indoor units are controlled by the energy-saving operation control. And a third method. A control program for an air conditioner having a plurality of indoor units,
A first process of selecting one of the energy-saving operation controls according to an energy-saving command from among energy-saving operation controls in which the degree of suppressing the driving ability is set in multiple stages;
The indoor unit having a high importance of the installation environment, a second process for setting a higher priority than the indoor unit having the low importance;
The indoor units that suppress the driving ability determined according to the selected energy-saving operation control are selected in order from the indoor units set with a lower priority, and the selected indoor units are controlled by the energy-saving operation control. A control program for causing a computer to execute the third process.

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