JP6029460B2 - Multi-type air conditioner and operation method thereof - Google Patents

Description

  The present invention relates to a multi-type air conditioner in which a plurality of indoor units are connected in parallel to one outdoor unit, and more particularly to a multi-type air conditioner installed in a building and a method for operating the same.

In recent years, there has been a demand for energy saving in multi-type air conditioners for buildings. Conventionally, as an operation control method for achieving energy saving in a multi-type air conditioner, for example, there is a method disclosed in Patent Document 1.
In Patent Document 1, a predicted power amount used for each demand calculation time is calculated, and when the calculated predicted power amount exceeds a demand value, an intermittent cutoff time corresponding to the excess power amount is calculated, and this intermittent cutoff is calculated. It is disclosed that the electric energy in the demand calculation time is suppressed within the target electric energy by intermittently operating the multi air conditioner based on the time.

JP 2006-29693 A

  However, in the above-described Patent Document 1, there is only one way of controlling power consumption for intermittent operation. In some cases, there is a possibility of deteriorating the indoor environment and greatly reducing the user's comfort.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a multi-type air conditioner and an operation control method thereof that can efficiently save energy while considering the indoor environment. And

  The present invention is a multi-type air conditioner in which a plurality of indoor units are connected to a single outdoor unit, and storage means for storing command information in which a power reduction amount and an energy saving control command are associated with each other, A power reduction amount calculation means for calculating a power reduction amount using the power amount and the target power amount, and a control command for acquiring an energy saving control command corresponding to the power reduction amount calculated by the power reduction amount calculation means from the command information Acquisition means, and command execution means for executing the energy saving control command acquired by the control command acquisition means, and a part of the energy saving control command includes a control command for the outdoor unit and a preset control. A combination of a plurality of control commands including a control command for the target indoor unit, and the command execution means includes a combination of the plurality of control commands. If that were done, to provide a multi-type air conditioner to run them together a plurality of control commands.

  According to the present invention, the command information in which the energy saving control command is associated with the power reduction amount is stored in the storage means in advance, and using this command information, the energy saving control command according to the current power reduction amount is generated. Obtained and executed. In this case, some energy-saving control commands are configured by a combination of a plurality of control commands including a control command for the outdoor unit and a control command for the control command for the indoor unit. Executed. As described above, since the power reduction is achieved by combining a plurality of operation control methods, the power can be effectively reduced.

  In the multi-type air conditioner, the storage unit stores the different command information according to the operation capacity of the indoor unit, and the control command acquisition unit stores the current operation capacity of the indoor unit. It is good also as acquiring the energy-saving control command corresponding to the said electric power reduction amount using the said command information corresponding to.

  Depending on the operating capacity of the indoor unit, the control command for effectively reducing the power differs. For example, if the operating capacity of the indoor unit is large, the power can be efficiently reduced by performing control to reduce the compressor rotation speed of the outdoor unit. However, when the operating capacity of the indoor unit is small, the outdoor unit Even if the compressor speed is reduced, the effect of lowering the power cannot be expected so much. As described above, since the method of effectively reducing the power according to the operating capacity of the indoor unit is different, command information in which appropriate energy saving control commands are set according to the operating capacity of the indoor unit is provided. As a result, the power can be reduced more efficiently.

  In the multi-type air conditioner, the storage unit stores different command information according to an outside air temperature and an operating capacity of the indoor unit, and the control command acquisition unit stores the current outside air temperature and the current air temperature. It is good also as acquiring the energy-saving control command corresponding to the said electric power reduction amount using the said command information determined by the operation capacity of the said indoor unit.

  The power reduction effect varies depending on the outside air temperature. Therefore, by using the outside air temperature as a parameter, it is possible to select appropriate command information even when the outside air temperature changes.

  In the multi-type air conditioner, the storage means stores different command information depending on a difference between a room temperature and a set temperature in the indoor unit during operation, and an operation capacity of the indoor unit. The control command acquisition means acquires the energy saving control command corresponding to the power reduction amount using the command information determined by the current difference and the current operating capacity of the indoor unit. Also good.

  The power reduction effect varies depending on the difference between the indoor temperature of the indoor unit and the set temperature. Therefore, by using the difference between the indoor temperature of the indoor unit and the set temperature as a parameter, it is possible to select appropriate command information even when these parameters change.

  In the multi-type air conditioner, each of the energy saving control commands includes a first control command for reducing a compressor rotational speed of the outdoor unit and a second control for reducing a refrigerant circulation amount of a predetermined indoor unit to be controlled. It is possible to include at least one of the command and the third control command for setting the indoor unit to be controlled to the thermo-off state.

  In this way, by combining control commands with different energy saving effects, it is possible to effectively reduce the power according to the power reduction amount.

  In the multi-type air conditioner, the command execution means collectively executes the first control command and the second control command when an inching state in which the compressor is repeatedly turned on and off occurs. It is good.

  Thereby, when the inching of the compressor is generated, the rotation speed of the compressor is reduced by the first control command, and the refrigerant circulation amount of the indoor unit is reduced by the second control command. Thereby, even when the inching of the compressor occurs, appropriate energy saving control can be performed. That is, when inching occurs, loss of the compressor accompanying start / stop is large, and it is difficult to obtain an energy saving effect. On the other hand, when inching occurs, the thermal load is small, so the indoor environment is unlikely to deteriorate, and the user does not feel uncomfortable. Therefore, in such a situation, the number of rotations of the compressor is reduced by executing the first control command, and the degree of subcooling or superheat of the indoor unit to be controlled is reduced by executing the second control command. It is possible to effectively reduce the amount of electric power by adjusting the load so that the load becomes smaller.

  The present invention relates to a control method for a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit, and command information in which a power reduction amount and an energy saving control command are associated is stored in a storage unit in advance. In addition, a process of calculating a power reduction amount using the current power amount and the target power amount, a step of acquiring an energy saving control command corresponding to the power reduction amount from the command information, and the acquired energy saving control A part of the energy saving control command is configured by a combination of a plurality of control commands including a control command for the outdoor unit and a control command for the indoor unit to be controlled that is set in advance. And providing a control method for a multi-type air conditioner that collectively executes the plurality of control commands when the energy-saving control command is composed of a combination of a plurality of control commands.

  According to the present invention, there is an effect that energy saving can be achieved efficiently while considering the indoor environment.

It is the figure which showed roughly the whole structure of the multi type air conditioner concerning 1st Embodiment of this invention. It is a functional block diagram of a control device concerning a 1st embodiment of the present invention. It is the figure which showed an example of the energy saving map. It is the figure which showed the process sequence of the control method of the multi type air conditioner which concerns on 1st Embodiment of this invention. It is a functional block diagram of the control apparatus which concerns on 2nd Embodiment of this invention. It is the figure which showed an example of the energy-saving map which concerns on 2nd Embodiment of this invention. It is the figure which showed an example of the energy-saving map which concerns on 2nd Embodiment of this invention. It is the figure which showed an example of the energy-saving map which concerns on 2nd Embodiment of this invention. It is the figure which showed the process sequence of the control method of the multi type air conditioner which concerns on 2nd Embodiment of this invention. It is the figure which showed the process sequence of the control method of the multi type air conditioner which concerns on 2nd Embodiment of this invention. It is the figure which showed the process sequence of the control method of the multi type air conditioner which concerns on 3rd Embodiment of this invention.

[First Embodiment]
Hereinafter, a multi-type air conditioner and a control method thereof according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram schematically showing an overall configuration of a multi-type air conditioner 1 according to the present embodiment. In the multi-type air conditioner 1, a plurality of indoor units 3 (31, 32, 33) are connected in parallel to one outdoor unit 2, and each of the indoor units 31, 32, 33 is connected to each other. A wired remote controller (not shown) is connected. The number of connected indoor units 3 is not limited to three, and may be any number.

  The outdoor unit 20 and the indoor unit 31 and the indoor units 31, 32, and 33 are connected to each other via a communication line and a refrigerant pipe, respectively. Furthermore, the multi-type air conditioner 1 includes a control device 10 that gives control commands to the outdoor unit 20 and the indoor units 31, 31, and 33. For example, the control device 10 gives a control command for the outdoor unit 2 to the outdoor unit 2 and also gives a control command to each of the indoor units 31, 32, 33 via the outdoor unit 2. , 33 are indirectly controlled. The control device 10 is provided, for example, in a centralized monitoring device for an air conditioning manager to give a command to the outdoor unit 2, and may be connected to an external network.

  The control device 10 controls the outdoor unit 2 and the indoor unit 3 in a predetermined control cycle in order to suppress the power consumption amount in a predetermined demand calculation time (for example, 30 minutes) to a predetermined target power amount or less. . The control cycle is arbitrarily set according to the control frequency in the demand calculation time, and is set to 3 minutes, for example. In addition, a target power amount is determined for each control cycle. This is set, for example, so that the total power consumption during the demand calculation time does not exceed the target power. Hereinafter, the target power amount set for each control cycle is referred to as “cycle target power amount”.

  The control device 10 is, for example, a computer, and includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory), a computer-readable recording medium, and the like. Processing procedures for realizing various functions to be described later are recorded in a recording medium or the like in the form of a program. The CPU reads this program into a RAM or the like, and executes information processing / calculation processing, which will be described later. Various functions are realized.

FIG. 2 is a functional block diagram of the control device 10.
As illustrated in FIG. 2, the control device 10 includes a power reduction amount calculation unit 11, a storage unit 12, a control command acquisition unit 13, and a command execution unit 14.
The power reduction amount calculation unit 11 calculates a power reduction amount x in one control cycle. That is, the power reduction amount x is calculated by the following equation (1).

  Power reduction amount x = {(power amount in current demand calculation time / cycle target power amount) −1} × 100 [%] (1)

  The storage unit 12 stores an energy saving map (command information) in which a power reduction amount x and an energy saving control command for achieving the power reduction amount x are associated with each other. FIG. 3 is a diagram showing an example of the energy saving map. As shown in FIG. 3, when the power reduction amount x is A [%] or more and less than B [%] (B> A), the energy saving control command including the first control command indicates that the power reduction amount x is B [%]. ] If it is less than C [%] (C> B), an energy saving control command consisting of the first control command and the second control command is used. If the power reduction amount x is C [%] or more, the first control is performed. An energy saving control command including a command, a second control command, and a third control command is set.

Here, the first control command, the second control command, and the third control command are set as follows.
(A) 1st control command: The compressor rotation speed of an outdoor unit is reduced.
(B) Second control command: Reduces the degree of superheat or the degree of supercooling of a predetermined indoor unit to be controlled.
(C) Third control command: A predetermined indoor unit to be controlled is set in a thermo-off state.

  The first control command may be, for example, directly giving a rotational speed command to the compressor of the outdoor unit 2, or increase or decrease the operating pressure of the compressor to a predetermined value (that is, increase during cooling and decrease during heating). It is good also as reducing indirectly by doing. By reducing the rotation speed of the compressor of the outdoor unit 2, the power consumption can be effectively reduced. Thus, since the first control command controls the outdoor unit 2, the entire system is energy-saving.

The second control command reduces the amount of refrigerant circulating in each indoor unit by reducing the degree of superheat or the degree of supercooling of a predetermined indoor unit (for example, the indoor units 21 and 22) set as a control target. By reducing it, the number of rotations of the compressor is reduced, and power consumption is reduced. According to the second control command, each of the indoor units 31, 32, 33 can be individually controlled. For example, the indoor unit 31, 32, 33 is attached to a room where the cooling or heating effect is reduced and no problem occurs even if the indoor environment deteriorates. The indoor units 31 and 32 can be controlled, and the indoor unit 33 that is installed in a room where the deterioration of the indoor environment is not preferable can be excluded from the control target. Thus, the second control command is excellent in that the indoor unit 3 to be controlled can be selected.
The decrease in the degree of superheat or the degree of supercooling is realized, for example, by controlling the opening degree of an expansion valve (not shown) provided in each of the indoor units 31, 32, and 33 in the closing direction.

The third control command forcibly turns off a predetermined indoor unit (for example, the indoor units 21 and 22) set as a control target, that is, a state where the fan is operating but the refrigerant is not flowing. The third control command is realized, for example, by outputting a control command for fully closing an expansion valve (not shown) provided for each of the indoor units 31, 32, and 33 when cooling. Moreover, in the case of heating, it implement | achieves by outputting the control command which makes a valve opening relatively small compared with the time of thermo-on.
Similar to the second control command, the third control command is excellent in that the indoor unit 3 to be controlled can be selected. Accordingly, (i) the indoor unit that does not permit the second control command and the third control command, (ii) the indoor unit that permits the second control command but does not permit the third control command, and (iii) the second control command also Indoor units that also allow the third control command can be mixed.

The control command acquisition unit 13 acquires an energy saving control command corresponding to the power reduction amount calculated by the power reduction amount calculation unit 11 from the energy saving map shown in FIG.
The command execution unit 14 executes the energy saving control command acquired by the control command acquisition unit 13. Here, when the energy saving control command is composed of a combination of a plurality of control commands, the command execution unit 14 collectively executes the plurality of control commands.

That is, when the power reduction amount x is greater than or equal to B [%] and less than C [%] (C> B), the first control command and the second control command are collectively executed, thereby compressing the outdoor unit. The number of machine revolutions is reduced, and the degree of superheat or the degree of supercooling of the indoor unit that is the control target of the second control command is lowered.
In addition, when the power reduction amount x is equal to or greater than C [%], the first control command, the second control command, and the third control command are collectively executed. As a result, the compressor rotation speed of the outdoor unit is reduced, and the indoor unit that permits the second control command and the third control command is set to the thermo-off state, and the second control command is permitted. 3 For an indoor unit that does not permit the control command, the degree of superheat or the degree of supercooling is reduced.

  Next, processing executed by the control device 10 according to the present embodiment will be described with reference to FIG. FIG. 4 is a diagram illustrating a procedure of processing that is repeatedly executed every demand calculation time by the control device 10 according to the present embodiment.

  First, the power amount in the current demand calculation time and the cycle target power amount are compared (step SA1), and then the power reduction amount x is calculated using the above equation (1) (step SA2). Next, it is determined whether the power reduction amount x is not less than A [%] and less than B [%] (step SA3). As a result, when the power reduction amount x is not less than A [%] and less than B [%], (a) the first control command is acquired as the energy saving control command from the energy saving control map shown in FIG. The first control command is executed (step SA4).

  On the other hand, in step SA3, when the power reduction amount x is not A [%] or more and less than B [%], the process proceeds to step SA5, where the power reduction amount x is B [%] or more and less than C [%]. It is determined whether or not. As a result, when the power reduction amount x is greater than or equal to B [%] and less than C [%], (a) first control command + (b) as an energy saving control command from the energy saving control map shown in FIG. The second control command is acquired, and the first control command and the second control command are collectively executed (step SA6). On the other hand, if the power reduction amount x is not B [%] or more and less than C [%] in step SA5, (a) first control command + as an energy saving control command from the energy saving control map shown in FIG. (B) The second control command + (c) the third control command is acquired, and these control commands are collectively executed (step SA7).

In this way, when the energy saving control command corresponding to the power reduction amount is executed over one control cycle (“YES” in step SA8), it is determined in step SA9 whether or not the current demand calculation time has ended. judge. As a result, if the demand calculation time has not ended, the process returns to step SA1 to start processing in the next control cycle. For example, when the demand calculation time is 30 minutes and the control cycle is 3 minutes, the above process is repeated 10 times.
In this way, when the control based on the energy saving control command in each control cycle is repeatedly performed and the demand calculation time is ended, “YES” is determined in Step SA10, and this processing is ended.

  As described above, according to the multi-type air conditioner 1 according to the present embodiment, the power reduction amount required for suppressing the power consumption amount during the demand calculation time to be equal to or less than the target power amount is set for each control cycle. The energy saving control command corresponding to the calculated power reduction amount is acquired from the energy saving map, and the acquired energy saving control command is executed. Thereby, it becomes possible to reduce electric power effectively based on the appropriate control command according to the electric power reduction amount. Further, when the energy saving control command is composed of a plurality of control commands, the plurality of control commands are executed in a lump, so that power reduction can be achieved in a short time.

  In the present embodiment, the amount of decrease in the compressor rotation speed of the outdoor unit may be adjusted according to the amount of power reduction, or the degree of superheat or subcooling of the indoor unit may be adjusted. In the second control command and the third control command, the number of indoor units to be controlled may be adjusted according to the power reduction amount. In this way, by adjusting the control command, it is possible to finely adjust the power reduction.

[Second Embodiment]
Next, a multi-type air conditioner according to a second embodiment of the present invention will be described. In the multi-type air conditioner according to the present embodiment, different energy saving maps are provided according to the operating capacity of the indoor unit 3, and the power saving amount is supported using the energy saving map corresponding to the operating capacity of the indoor unit 3. It differs from the multi-type air conditioner 1 which concerns on 1st Embodiment mentioned above by the point which acquires the energy-saving control command to perform.
Hereinafter, description of points common to the first embodiment described above will be omitted, and different points will be mainly described.

FIG. 5 is a functional block diagram of the control device 10 ′ according to the present embodiment. As shown in FIG. 5, the control device 10 ′ according to the present embodiment includes substantially the same functional blocks as the first embodiment described above, but information stored in the storage unit 12 ′, the control command acquisition unit 13 ′. Is different from the above-described first embodiment.
Specifically, as shown in FIGS. 6 to 8, the storage unit 12 ′ stores different energy saving maps I, II, and III in association with the operating capacity y of the indoor unit 3. For example, when the indoor unit operating capacity y is F [%] or more, the energy saving map I (see FIG. 6) is used. When the indoor unit operating capacity is G [%] or more and less than F [%], the energy saving map II is used. When the indoor unit operating capacity is less than G [%] (see FIG. 7), the energy saving map III (see FIG. 8) is associated.

  As shown in FIG. 6, in the energy saving map I, when the power reduction amount x is not less than A [%] and less than B [%] (B> A), the energy saving control command including the first control command is the power reduction amount. When x is greater than or equal to B [%] and less than C [%] (C> B), an energy-saving control command comprising the first control command and the second control command is present, and the power reduction amount x is greater than or equal to C [%] Is set with an energy saving control command including a first control command, a second control command, and a third control command. That is, the energy saving map I is the same as the energy saving map in the first embodiment described above.

  As shown in FIG. 7, in the energy saving map II, when the power reduction amount x is not less than H [%] and less than I [%] (I> H), the energy saving control command including the second control command is the power reduction amount. When x is greater than or equal to I [%] and less than J [%] (I> J), an energy-saving control command comprising the second control command and the first control command is present, and the power reduction amount x is greater than or equal to J [%] Is set with an energy-saving control command including a second control command, a first control command, and a third control command.

  As shown in FIG. 8, in the energy saving map III, when the power reduction amount x is K [%] or more and less than L [%] (L> K), the energy saving control command including the second control command is the power reduction amount. When x is L [%] or more, an energy saving control command composed of the second control command and the third control command is issued. When the power reduction amount x is J [%] or more, the second control command and the first control are given. An energy saving control command including a command and a third control command is set.

  When the operating capacity of the indoor unit 3 is relatively small, even if the target pressure of the outdoor unit 2 is reduced, the effect of reducing the electric power due to this cannot be obtained. Therefore, when the operating capacity of the indoor unit 3 is small, that is, when the indoor unit operating capacity is less than F [%], the indoor that is the control target is more than the first control command that reduces the target pressure of the outdoor unit 2. The second control command for reducing the degree of superheating / cooling of the machine 3 is given priority.

  Next, processing executed by the control device 10 ′ according to the present embodiment will be described with reference to FIGS. FIG. 9 and FIG. 10 are diagrams showing a flowchart of processing that is repeatedly executed every demand calculation time by the control device 10 ′ according to the present embodiment.

  First, the power amount in the current demand calculation time is compared with the cycle target power amount (step SB1). Subsequently, the power reduction amount x is calculated (step SB2). Next, it is determined whether the indoor unit operating capacity is F [%] or more (step SB3). If it is within F [%], the energy saving map I (see FIG. 6) is acquired from the storage unit 20 ′ (step SB4). Thereby, the acquisition of the energy saving control command based on the energy saving map I is performed. Specifically, it is determined whether the power reduction amount x calculated in step SB2 is not less than A [%] and less than B [%] (step SB5). As a result, if it is greater than or equal to A [%] and less than B [%] (“YES” in step SB5), (a) the first control command is acquired and the first control command is executed (step SB6). .

  On the other hand, if the power reduction amount x is not A [%] or more and less than B [%] in step SB5, it is determined whether or not the power reduction amount x is B [%] or more and less than C [%]. (Step SB7). As a result, when the power reduction amount x is B [%] or more and less than C [%], (a) first control command + (b) second control command is acquired as the energy saving control command, and the first The control command and the second control command are collectively executed (step SB8).

  In step SB7, when the power reduction amount x is not B [%] or more and less than C [%], as an energy saving control command, (a) first control command + (b) second control command + (c ) The third control command is acquired, and these control commands are collectively executed (step SB9).

  On the other hand, if the indoor unit operating capacity is not equal to or greater than F [%] in step SB3, the process proceeds to step SB10 in FIG. Determine. As a result, when the indoor unit operating capacity is G [%] or more and less than F [%], the energy saving map II (see FIG. 7) is acquired from the storage unit 20 ′ (step SB11). Thereby, acquisition of the energy saving control command based on the energy saving map II is performed. Specifically, it is determined whether the power reduction amount x calculated in step SB2 is greater than or equal to H [%] and less than I [%] (step SB12). As a result, when the power reduction amount x is equal to or greater than H [%] and less than I [%], (b) a second control command is acquired and the second control command is executed (step SB13).

  In step SB12, if the power reduction amount x is not H [%] or more and less than I [%], it is determined whether or not the power reduction amount x is I [%] or more and less than J [%]. (Step SB14). As a result, when it is I [%] or more and less than J [%], (b) the second control command + (a) the first control command is acquired as the energy saving control command, and the second control command and the first control command are acquired. The control command is collectively executed (step SB15).

  On the other hand, when the power reduction amount x is not greater than I [%] and less than J [%] in step SB14, (b) second control command + (a) first control command + (c ) The third control command is acquired, and these control commands are collectively executed (step SB16).

  In step SB10, if the indoor unit operating capacity is not G [%] or more and less than F [%], the energy saving map III (see FIG. 8) is acquired from the storage unit 20 ′ (step SB17). Thereby, the acquisition of the energy saving control command based on the energy saving map III is performed. Specifically, it is determined whether the power reduction amount x calculated in step SB2 is K [%] or more and less than L [%] (step SB18). As a result, when the power reduction amount x is K [%] or more and less than L [%], (b) the second control command is acquired as the energy saving control command, and the second control command is executed (step SB19). ). On the other hand, if the power reduction amount x is not K [%] or more and less than L [%] in step SB18, (b) second control command + (c) third control command is acquired as the energy saving control command. Then, the second control command and the third control command are collectively executed (step SB20).

In this way, when an appropriate energy saving control command determined in accordance with the indoor unit operating capacity and the power reduction amount x is executed over one control cycle (“YES” in step SB21 of FIG. 9), It is determined whether or not the demand calculation time has expired (step SB23). As a result, when the demand calculation time has not ended, the process returns to step SB1, and the power reduction control in the next control cycle is performed by performing the control after step SB1.
On the other hand, if it is determined in step SB23 that the current demand calculation time has ended, this processing ends.

As described above, according to the multi-type air conditioner according to the present embodiment, the energy saving control command is determined in consideration of not only the power reduction amount but also the indoor unit operation capacity. Therefore, the power reduction amount and the indoor unit operation are determined. It is possible to determine an appropriate control command that contributes to power reduction from both sides of the capacity.
Note that the power reduction effect varies depending on the outside air temperature and the set temperature. Therefore, an energy saving map for each indoor unit operating capacity may be prepared in association with the outside air temperature and stored in the storage unit 20 ′. Further, instead of the outside air temperature, the difference between the current indoor temperature and the set temperature in each of the indoor units 31, 32, and 33 that are in operation may be used. In this case, since the difference between the current indoor temperature and the set temperature is calculated for each indoor unit in operation, these average values are adopted, or a weight is set for each indoor unit, and the weight is added. The value may be calculated.

[Third Embodiment]
Next, a multi-type air conditioner according to a third embodiment of the present invention will be described.
The multi-type air conditioner according to the present embodiment is substantially the same as that of the first embodiment or the second embodiment described above, but when the inching of the compressor, that is, a state where ON and OFF are repeated occurs, The difference is that it switches to an energy-saving control command for inching. In the present embodiment, when the inching of the compressor occurs, the first control command and the second control command are collectively executed.

  An example of a flowchart executed by the control device according to this embodiment is shown in FIG. FIG. 11 is a flow in which processing related to inching is added to the flow according to the first embodiment described above. Specifically, a step for determining whether or not inching has occurred is provided as a step after step SA2 (step SC3). If it is determined in step SC3 that inching has not occurred, an energy saving control command based on the power reduction amount x is acquired (steps SA3 to SA7). On the other hand, if it is determined that inching has occurred, (a) the first control command and (b) the second control command are executed as the energy saving control commands in step SC4, and the process proceeds to step SA8. .

  As described above, according to the multi-type air conditioner according to the present embodiment, it is possible to perform appropriate energy saving control even when inching of the compressor occurs. That is, when inching occurs, loss of the compressor accompanying start / stop is large, and it is difficult to obtain an energy saving effect. On the other hand, when inching occurs, the thermal load is small, so the indoor environment is unlikely to deteriorate, and the user does not feel uncomfortable. Therefore, in such a situation, (a) by executing the first control command, the rotation speed of the compressor is reduced, and the supercooling degree or superheat degree of the indoor unit to be controlled is controlled by the load of the compressor. By adjusting in the decreasing direction, it is possible to effectively reduce the electric energy.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and the above-described embodiments are partially or wholly combined without departing from the scope of the invention. For example, various modifications can be made.

DESCRIPTION OF SYMBOLS 1 Multi type air conditioner 2 Outdoor unit 3 (31, 32, 33) Indoor unit 10 Control apparatus 11 Electric power reduction amount calculation part 12, 12 'Memory | storage part 13, 13' Control command acquisition part 14 Command execution part

Claims (7)

A multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit,
Storage means for storing command information in which a power reduction amount and an energy saving control command are associated;
A power reduction amount calculating means for calculating a power reduction amount using the current power amount and the target power amount;
Control command acquisition means for acquiring an energy saving control command corresponding to the power reduction amount calculated by the power reduction amount calculation means from the command information;
Command execution means for executing the energy-saving control command acquired by the control command acquisition means,
Some of the energy-saving control commands are configured by a combination of a plurality of control commands including a control command for the outdoor unit and a control command for the indoor unit that is set in advance,
The command execution means is a multi-type air conditioner that collectively executes a plurality of control commands when the energy saving control command is configured by a combination of a plurality of control commands. The storage unit stores the different command information according to the operation capacity of the indoor unit,
The multi-type air conditioner according to claim 1, wherein the control command acquisition means acquires an energy-saving control command corresponding to the power reduction amount using the command information corresponding to a current operating capacity of the indoor unit. The storage means stores the different command information according to the outside air temperature and the operating capacity of the indoor unit,
The said control command acquisition means acquires the energy-saving control command corresponding to the said electric power reduction amount using the said command information determined by the present outdoor temperature and the present operating capacity of the said indoor unit. Multi-type air conditioner. The storage means stores the different command information according to the difference between the indoor temperature and the set temperature in the indoor unit during operation, and the operating capacity of the indoor unit,
The said control command acquisition means acquires the energy-saving control command corresponding to the said electric power reduction amount using the said command information determined by the said present difference and the present operating capacity of the said indoor unit. Multi-type air conditioner.   Each of the energy saving control commands is a first control command for reducing the compressor rotation speed of the outdoor unit, a second control command for reducing the refrigerant circulation amount of the predetermined indoor unit that is a control target, and the control target The multi air conditioner according to any one of claims 1 to 4, comprising at least one of the third control commands for setting the indoor unit in a thermo-off state.   6. The multi-type air according to claim 5, wherein the command execution means collectively executes the first control command and the second control command when an inching state in which the compressor is repeatedly turned on and off occurs. Harmony machine. A control method for a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit,
Command information in which the power reduction amount and the energy saving control command are associated is stored in advance in the storage unit,
Calculating the amount of power reduction using the current power amount and the target power amount;
A process of acquiring an energy saving control command corresponding to the power reduction amount from the command information;
And executing the acquired energy saving control command,
Some of the energy-saving control commands are configured by a combination of a plurality of control commands including a control command for the outdoor unit and a control command for the indoor unit that is set in advance,
A control method of a multi-type air conditioner that collectively executes a plurality of control commands when the energy saving control command is configured by a combination of a plurality of control commands.

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