JP6194299B2 - Air conditioning system - Google Patents

Description

  Embodiments described herein relate generally to an air conditioning system.

  2. Description of the Related Art Conventionally, there is an air conditioning system that activates a plurality of stopped indoor units at different times in order to suppress an increase in the peak value of power consumption in the entire plurality of indoor units. However, when the start time of each indoor unit is changed to advance, the total power consumption may increase as the operation time becomes longer.

JP 2006-29694 A

  The problem to be solved by the present invention is to provide an air conditioning system that can appropriately suppress an increase in the peak value of power consumption and the total power consumption in accordance with the operating states of a plurality of indoor units.

  The air conditioning system of the embodiment includes a plurality of indoor units, a plurality of temperature sensors, and a control device. Each of the plurality of temperature sensors detects the ambient temperature in each of the plurality of indoor units. The control device calculates the temperature characteristic value from the detection value of the temperature sensor in each of the plurality of characteristic value calculation groups. In the plurality of characteristic value calculation groups, the plurality of indoor units are classified according to the change characteristics of each ambient temperature. The control device calculates a temperature determination value for determining whether or not to execute the start control of the plurality of start control groups using the temperature characteristic values of the plurality of characteristic value calculation groups. In the plurality of activation control groups, a plurality of indoor units are classified. In the activation control of the plurality of activation control groups, different heating activation times are set in each of the plurality of activation control groups.

The figure which shows the structure of the air conditioning system of embodiment. The figure which shows the structure of the air conditioning system of embodiment. The figure which shows an example of the change of the temperature characteristic value of the characteristic value calculation group of each floor of the air conditioning system of embodiment, the 1st temperature determination value in 1st determination time, and the 2nd temperature determination value in 2nd determination time . The figure which shows an example of the change of the power consumption at the time of heating starting of each floor of the air conditioning system of embodiment, and heating start time.

  Hereinafter, an air conditioning system according to an embodiment will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the air conditioning system 10 according to the embodiment includes a plurality of indoor units 11 connected to a plurality of refrigerant piping systems. The air conditioning system 10 includes at least one indoor unit 11 in each of the plurality of refrigerant piping systems. Each of the plurality of indoor units 11 includes a temperature sensor 12 that detects the temperature of the atmosphere (for example, the temperature of the atmosphere that each indoor unit 11 sucks into the interior). The air conditioning system 10 includes a control device 13 that controls the air conditioning system 10 in an integrated manner.
The air conditioning system 10 of the embodiment is installed in an appropriate building, for example, a seven-story building 1 as shown in FIG. The air conditioning system 10 includes a plurality of indoor units 11 on each floor (F1 to F7) of the building 1.

Each of the plurality of refrigerant piping systems includes at least one outdoor unit (not shown), at least one indoor unit 11, and a refrigerant circulation pipe (not shown) that forms a refrigerant flow path. The outdoor unit includes, for example, devices such as a compressor (not shown), an outdoor heat exchanger (not shown), an accumulator (not shown), and an outdoor air blower (not shown). The indoor unit 11 includes devices such as a decompression device (not shown), an indoor heat exchanger (evaporator), and an indoor blower (not shown). The refrigerant circulation pipe includes a gas side pipe (not shown) through which a gas refrigerant mainly circulates and a liquid side pipe through which a liquid refrigerant mainly circulates. The indoor unit 11 and the plurality of devices of the outdoor unit form a refrigeration cycle that circulates the refrigerant by being connected by a refrigerant circulation pipe.
Each temperature sensor 12 of the plurality of indoor units 11 is connected to the control device 13. Each temperature sensor 12 detects the temperature of the surrounding area of each indoor unit 11 in the space X, and outputs a signal of the detected temperature to the control device 13.

  The plurality of indoor units 11 are classified according to each of the plurality of refrigerant piping systems, and classified according to each of the plurality of signal transmission systems in signal transmission with the control device 13. For example, as shown in FIG. 2, three floors of the building 1 are provided with three refrigerant piping systems of a first refrigerant piping system GA, a second refrigerant piping system GB, and a third refrigerant piping system GC. The first refrigerant piping system GA includes two signal transmission systems, a first signal transmission system R1 and a second signal transmission system R2. The second refrigerant piping system GB includes two signal transmission systems, a third signal transmission system R3 and a fourth signal transmission system R4. The third refrigerant piping system GC includes three signal transmission systems, a fifth signal transmission system R5, a sixth signal transmission system R6, and a seventh signal transmission system R7.

  The first signal transmission system R1 includes, for example, one indoor unit 11 disposed in the elevator hall EV. The second signal transmission system R2 includes, for example, four indoor units 11 controlled by the same control signal in the first region of the living room WR. The third signal transmission system R3 includes, for example, three indoor units 11 that are controlled by the same control signal in the second region of the living room WR. The fourth signal transmission system R4 includes, for example, one indoor unit 11 arranged in the conference room MR of the living room WR. The fifth signal transmission system R5 includes, for example, one indoor unit 11 arranged in the private room PR of the living room WR. The sixth signal transmission system R6 includes, for example, three indoor units 11 controlled by the same control signal in the third region of the living room WR. The seventh signal transmission system R7 includes, for example, four indoor units 11 controlled by the same control signal in the fourth region of the living room WR.

  The plurality of indoor units 11 are classified into a plurality of characteristic value calculation groups according to the change characteristics of each ambient temperature within a predetermined heating target period in addition to the plurality of refrigerant piping systems and the plurality of signal transmission systems. . For example, in the building 1 shown in FIG. 1, different characteristic value calculation groups are set on each floor (F1 to F7) of the building 1. For example, in each floor of the building 1 shown in FIG. 2, a plurality of rooms arranged in the first area, the second area, the third area, and the fourth area of the living room WR that are recognized to have substantially the same change characteristics of the atmospheric temperature. The machine 11 constitutes one characteristic value calculation group. That is, the elevator hall EV, the conference room MR, and the private room PR are excluded from the characteristic value calculation group formed from the first area, the second area, the third area, and the fourth area of the living room WR. The elevator hall EV has a greater influence of outside air due to, for example, ventilation of a staircase space or a break room, compared to the first to fourth regions of the living room WR. The conference room MR and the private room PR have, for example, irregular use times and large changes in the ambient temperature, as compared with the first to fourth regions of the living room WR. As a result, the characteristic value calculation groups provided on each floor (F1 to F7) of the building 1 include a plurality of second signal transmission systems R2, third signal transmission systems R3, sixth signal transmission systems R6, and seventh signal transmission systems R7. The indoor unit 11 is provided.

The control apparatus 13 performs preheating start control for suppressing the peak value of power consumption at the time of heating start of the plurality of indoor units 11 as necessary. The control device 13 sets a temperature determination value for determining whether or not the preheating start control is necessary based on the detection values of the temperature sensors 12 of the plurality of indoor units 11. The control device 13 sets the activation order of the plurality of indoor units 11 when the preheating activation control is executed based on the detection values of the temperature sensors 12 of the plurality of indoor units 11.
Below, the detail of operation | movement of the control apparatus 13 is demonstrated.

  The control device 13 calculates a temperature characteristic value from detection values of the temperature sensors 12 of the plurality of indoor units 11 in each characteristic value calculation group. For example, in the characteristic value calculation group provided on each floor (F1 to F7) of the building 1, the control device 13 calculates an average value using detection values of the plurality of temperature sensors 12 included in each characteristic value calculation group. The control device 13 calculates an average value using detection values of the temperature sensors 12 at appropriate time intervals at each of one or more characteristic value calculation timings within a predetermined heating target period. The control device 13 sets the calculated average value as a temperature characteristic value indicating the change characteristic of the atmospheric temperature of the characteristic value calculation group.

  The control device 13 extracts the minimum temperature characteristic value in the temperature characteristic values of the plurality of characteristic value calculation groups at each of the plurality of characteristic value calculation timings within the predetermined heating target period. The control device 13 acquires the minimum value in the time series data of the minimum temperature characteristic value from the extraction history of the minimum temperature characteristic value at each characteristic value calculation timing. The control device 13 calculates a temperature determination value for determining whether or not to execute predetermined start-up control from the reference temperature, using the acquired minimum value as a reference temperature.

  For example, when a predetermined heating target period (December to March, etc.) starts, the control device 13 sets the characteristic value calculation timing at a predetermined time period (such as a predetermined time period from 10 minutes to 30 minutes) throughout the day. To do. The control device 13 calculates the temperature characteristic value of the characteristic value calculation group on each floor (F1 to F7) of the building 1 at each characteristic value calculation timing, and extracts the minimum temperature characteristic value from the calculated temperature characteristic value. For example, in the building 1, the temperature characteristic value of the characteristic value calculation group on the seventh floor (7F) where the temperature is most likely to decrease is extracted as the minimum temperature characteristic value. The control device 13 acquires the minimum value in the time series data of the minimum temperature characteristic value based on the extraction history of the minimum temperature characteristic value from the start of the predetermined heating target period to the current time at each characteristic value calculation timing. . The control device 13 sets the smallest temperature characteristic value among the minimum temperature characteristic values extracted from the start of the predetermined heating target period to the present time as the reference temperature. That is, the control device 13 updates the reference temperature with the minimum value of the temperature characteristic value at any time during a predetermined heating target period.

  The predetermined start-up control is preheat start-up control that sets different heating start-up times according to temperature characteristic values in each of a plurality of start-up control groups into which the plurality of indoor units 11 are classified. The control device 13 advances the heating start time of the preheating start control earlier than the heating start time of normal start control (for example, control for starting all the indoor units 11 at the same time), and the heating start time of each start control group Are different times. Each of the plurality of activation control groups includes a plurality of indoor units 11 that execute the same control. The plurality of activation control groups are the same as the plurality of characteristic value calculation groups, for example. That is, the control apparatus 13 sets the same heating start time according to the temperature characteristic value of each characteristic value calculation group with respect to the plurality of indoor units 11 of each characteristic value calculation group.

The control device 13 calculates a plurality of different temperature determination values corresponding to a plurality of different preheating start controls using the reference temperature. For example, the control device 13 sets two different first temperature determination values C1 and second temperature determination values C2 corresponding to two different first preheating start controls and second preheat start controls. For example, the control device 13 sets a first temperature determination value C1 (for example, 13 ° C.) by subtracting a predetermined first temperature parameter (for example, 2 ° C.) from a reference temperature (for example, 15 ° C.). For example, the control device 13 subtracts a predetermined second temperature parameter (for example, 0 ° C.) smaller than the predetermined first temperature parameter from the reference temperature (for example, 15 ° C.) to thereby determine the second temperature determination value C2 (for example, 15 ° C.). ) Is set. Thereby, the control device 13 makes the first temperature determination value C1 smaller than the second temperature determination value C2.
Moreover, the control apparatus 13 changes the tendency to advance the determination time for determining whether or not to execute each preheating start control as each temperature determination value becomes smaller among the plurality of temperature determination values. For example, for the first preheating start control corresponding to the first temperature determination value C1 smaller than the second temperature determination value C2, the control device 13 performs the second preheating start control corresponding to the second temperature determination value C2. A determination time (first determination time T1) earlier than the determination time (second determination time T2) is set.

  For example, in the first preheating start control and the second preheat start control, the control device 13 performs the first preheat start control corresponding to the relatively small first temperature determination value C1 at the start of the long holiday in winter. This is executed when the peak value of power consumption increases relatively largest. In addition, the control device 13 performs the second preheating start control corresponding to the relatively large second temperature determination value C2, for example, while the peak value of power consumption is relatively small, such as at the start of the week. Execute when it increases.

When the control device 13 determines whether or not to execute each preheating start control using each temperature determination value, a plurality of start control groups (e.g., corresponding to a plurality of characteristic value calculation groups) are determined at each determination time. It is determined whether the minimum temperature characteristic value in the temperature characteristic value is smaller than each temperature determination value. When the minimum temperature characteristic value is equal to or higher than each temperature determination value, the control device 13 prohibits execution of each preheating start control. When the minimum temperature characteristic value is smaller than each temperature determination value, the control device 13 permits execution of each preheating start control.
For example, when two different first temperature determination values C1 and second temperature determination values C2 are set, the control device 13 first corresponds to the first temperature determination value C1 that is smaller than the second temperature determination value C2. At the first determination time T1, temperature characteristic values of a plurality of activation control groups are calculated. Thereby, the control apparatus 13 calculates the temperature characteristic value of the characteristic value calculation group (equivalent to a starting control group) of each floor (F1-F7) of the building 1, for example, as shown in FIG. And the control apparatus 13 determines whether the minimum temperature characteristic value in the temperature characteristic value of a some starting control group is smaller than the 1st temperature determination value C1. When the minimum temperature characteristic value is smaller than the first temperature determination value C1, the control device 13 executes the first preheating start control. In this case, the control device 13 does not determine whether or not the second preheating start control is necessary.

On the other hand, when the minimum temperature characteristic value is equal to or higher than the first temperature determination value C1, the control device 13 prohibits execution of the first preheating start control. Next, the control device 13 performs a plurality of operations at a second determination time T2 (that is, a second determination time T2 later than the first determination time T1) corresponding to the second temperature determination value C2 that is larger than the first temperature determination value C1. The temperature characteristic value of the start control group is calculated. Thereby, the control apparatus 13 calculates the temperature characteristic value of the characteristic value calculation group (equivalent to a starting control group) of each floor (F1-F7) of the building 1 in the building 1, for example. And the control apparatus 13 determines whether the minimum temperature characteristic value in the temperature characteristic value of a some starting control group is smaller than the 2nd temperature determination value C2. When the minimum temperature characteristic value is smaller than the second temperature determination value C2, the control device 13 executes the second preheating start control.
On the other hand, when the minimum temperature characteristic value is equal to or greater than the second temperature determination value C2, the control device 13 prohibits execution of the second preheating start control. In this case, the control device 13 does not execute the first preheat start control and the second preheat start control, but performs normal start control (for example, control for starting all the indoor units 11 simultaneously).

  At the time of execution of each preheating start control, the control device 13 sets the start order of the plurality of start control groups by changing the tendency to advance the heating start time as the temperature characteristic value decreases in the plurality of start control groups. . At each determination time, the control device 13 activates heating first (in descending order of ambient temperature) from the activation control group having a small temperature characteristic value in the plurality of activation control groups. For example, the control device 13 has the seventh floor (F7), the second floor (F2), the sixth floor (F6), the fifth floor (in order of increasing temperature characteristic value of the characteristic value calculation group of each floor (F1 to F7) of the building 1 ( F5) When it becomes 4th floor (F4), 3rd floor (F3), 1st floor (F1), heating is started in this order. As shown in FIG. 4, the controller 13 sequentially sets the heating start times of the floors (F1 to F7) at 4:30 (F7), 5:00 (F2), 5:30 (F6), and 6:00. (F5), 6:30 (F4), and 7:00 (F3) are set.

  In each of a plurality of different preheating start controls, the control device 13 includes a start time of each preheat start control (that is, a heating start time of the start control group that starts first) and a heating start time of the plurality of start control groups. At least one of the intervals is set to be different from each other. The control device 13 includes a start time of each preheating start control and a start time of each preheating start control so that each preheat start control is completed before a predetermined time (for example, work start time in the room WR) set in advance in the target space for heating operation. Set the judgment time.

  According to the embodiment described above, by having the control device 13 that calculates the temperature determination value for determining whether or not the preheating start control is necessary using the temperature characteristic values of the plurality of characteristic value calculation groups, The temperature judgment value can be easily set from the detection value of the temperature sensor 12. Since the plurality of indoor units 11 have the control device 13 that uses the temperature characteristic values of a plurality of characteristic value calculation groups classified according to the change characteristics of the respective ambient temperatures, an error factor when setting the temperature judgment value is eliminated. Thus, the temperature judgment value can be set appropriately. Since it has the control apparatus 13 which sets a temperature judgment value appropriately, it can be judged appropriately whether preheating start control is required, and the peak value of power consumption increases according to the operating state of a plurality of indoor units 11 And the increase in total power consumption can be suppressed appropriately.

  Furthermore, since it has the control apparatus 13 which sets the starting order of several starting control groups by changing to the tendency which advances heating start time with a temperature characteristic value becoming small in several starting control groups, it is a peak of power consumption. An increase in value can be suppressed. Since the control device 13 is provided, it is possible to set an appropriate activation order according to the actual operation status of the plurality of indoor units 11 in each activation control group and the change characteristics of the ambient temperature.

Since the control device 13 sets the temperature determination value using the minimum value from the extraction history of the minimum temperature characteristic value in the plurality of characteristic value calculation groups, the minimum temperature characteristic value corresponding to the peak value of the power consumption that has already occurred The temperature judgment value can be set appropriately by using the value effectively.
Furthermore, since it has the control apparatus 13 which sets determination time according to several different temperature determination values, appropriate preheating starting control is performed according to the size of the temperature determination values, that is, the power consumption of each indoor unit 11. Can do.

Furthermore, since the control device 13 that changes the tendency to advance the determination time as the temperature determination value becomes smaller is provided, it is possible to execute appropriate preheating start control according to the magnitude of the temperature determination value at an appropriate timing.
Since the control device 13 sets a plurality of different temperature determination values using at least one temperature parameter, a plurality of different temperature determination values are obtained by one reference temperature calculated from the temperature characteristic values of a plurality of characteristic value calculation groups. Can be set easily.

Hereinafter, modifications of the embodiment will be described.
In the above-described embodiment, one characteristic value calculation group is provided on each floor (F1 to F7) of the building 1. However, the present invention is not limited to this. A plurality of characteristic value calculation groups may be provided on each floor (F1 to F7).

In the above-described embodiment, the plurality of activation control groups are the same as the plurality of characteristic value calculation groups, but are not limited thereto.
For example, one characteristic value calculation group may include a plurality of activation control groups. For example, one characteristic value calculation group including a plurality of indoor units 11 of the second signal transmission system R2, the third signal transmission system R3, the sixth signal transmission system R6, and the seventh signal transmission system R7 illustrated in FIG. One first activation control group and a second first activation control group may be set. The first activation control group may include a plurality of indoor units 11 in the second signal transmission system R2 and the seventh signal transmission system R7, for example. For example, the second activation control group may include a plurality of indoor units 11 of the third signal transmission system R3 and the sixth signal transmission system R6. The control device 13 has a single heating start time set in accordance with the temperature characteristic value of the characteristic value calculation group, for example, different heating start times in the first start control group and the second first start control group, respectively. May be set by an appropriate calculation.

  In the embodiment described above, the control device 13 uses the average value of the detection values of the plurality of temperature sensors 12 as the temperature characteristic value, but is not limited to this. Instead of the average value of the plurality of detection values, the median value or the mode value of the plurality of detection values may be used as the temperature characteristic value.

  In the above-described embodiment, the control device 13 sets the characteristic value calculation timing in a predetermined time period over the entire day of the day when the predetermined heating target period starts, but is not limited thereto. For example, the control device 13 may set the characteristic value calculation timing in a period in which the thermal operation of the air conditioning system 10 is stopped (period from nighttime to early morning on weekdays, all day on holidays, etc.).

  In the embodiment described above, the control device 13 calculates the temperature determination value in the determination value calculation period provided within the predetermined heating target period, and the temperature determination value in a period other than the determination value calculation period within the predetermined heating target period. May be used to determine whether or not to execute each preheating start control. For example, the control device 13 calculates the temperature determination value in the determination value calculation period from the start of the heating target period to before the winter vacation, and uses the temperature determination value in the period after the winter vacation to execute each preheating start control. You may determine no. The control device 13 calculates the temperature determination value during a period in which the temperature drop is relatively small within the predetermined heating target period, thereby obtaining a peak value of power consumption during the period in which the temperature drop is relatively large. The power consumption can be suppressed to the peak value during the calculation period.

In the embodiment described above, the control device 13 may correct the temperature determination value according to the correspondence relationship between the power consumption in each indoor unit 11 and the detection value of the temperature sensor 12. Since there is a correlation between the temperature characteristic value of each characteristic value calculation group and the power consumption of the plurality of indoor units 11 in each characteristic value calculation group, a more appropriate temperature determination value can be set.

According to at least one embodiment described above, the control device 13 that calculates the temperature determination value for determining whether or not the preheating start control is necessary is calculated using the temperature characteristic values of a plurality of characteristic value calculation groups. Thus, the temperature determination value can be easily set from the detection value of each temperature sensor 12. Since the plurality of indoor units 11 have the control device 13 that uses the temperature characteristic values of a plurality of characteristic value calculation groups classified according to the change characteristics of the respective ambient temperatures, an error factor when setting the temperature judgment value is eliminated. Thus, the temperature judgment value can be set appropriately. Since it has the control apparatus 13 which sets a temperature judgment value appropriately, it can be judged appropriately whether preheating start control is required, and the peak value of power consumption increases according to the operating state of a plurality of indoor units 11 And the increase in total power consumption can be suppressed appropriately.
Furthermore, since it has the control apparatus 13 which sets the starting order of several starting control groups by changing to the tendency which advances heating start time with a temperature characteristic value becoming small in several starting control groups, it is a peak of power consumption. An increase in value can be suppressed. Since the control device 13 is provided, an appropriate activation order can be set according to the change characteristic of the ambient temperature of each activation control group.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Air conditioning system, 11 ... Indoor unit, 12 ... Temperature sensor, 13 ... Control apparatus

Claims (8)

Multiple indoor units,
A temperature sensor for detecting an ambient temperature in each of the plurality of indoor units;
In each of a plurality of characteristic value calculation groups in which the plurality of indoor units are classified according to the change characteristics of the ambient temperature, temperature characteristic values are calculated from detection values of the temperature sensors, and the plurality of indoor units are classified. A temperature determination value for determining whether or not to execute start control for setting different heating start times in each of the plurality of start control groups is calculated using the temperature characteristic values of the plurality of characteristic value calculation groups A control device;
Comprising
Air conditioning system. The controller is
The temperature characteristic value of each of the plurality of start control groups is set from the temperature characteristic values of the plurality of characteristic value calculation groups, and the heating start time is set as the temperature characteristic value decreases in the plurality of start control groups. Setting the activation order of the plurality of activation control groups by changing the tendency to advance,
The air conditioning system according to claim 1. The controller is
The minimum temperature characteristic value in the temperature characteristic value of the plurality of characteristic value calculation groups is extracted at each of one or more characteristic value calculation timings within a predetermined heating target period, and the minimum temperature characteristic value extraction history is used to extract the temperature characteristic value. Setting the temperature determination value using the minimum value in the time-series data of the minimum temperature characteristic value;
The air conditioning system according to claim 1 or 2. The controller is
Using a plurality of different temperature determination values to determine whether or not to execute a plurality of different startup controls at different determination times;
The air conditioning system according to any one of claims 1 to 3. The controller is
The temperature determination value is calculated in a determination value calculation period provided in a predetermined heating target period, and the start control is performed using the temperature determination value in a period other than the determination value calculation period in the predetermined heating target period. Determine whether or not to execute,
The air conditioning system according to any one of claims 1 to 4. The controller is
As the temperature judgment value becomes smaller, the judgment time is changed to a tendency to be advanced,
The air conditioning system according to claim 4. The controller is
Using the temperature characteristic values of the plurality of characteristic value calculation groups and at least one temperature parameter to set the plurality of different temperature determination values;
The air conditioning system according to claim 4. The determination value calculation period is a period in which a decrease in temperature is relatively small within the predetermined heating target period.
The air conditioning system according to claim 5.

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