Air conditioner control device and air conditioner control method

Abstract

An air-conditioning control device is provided with: a control level setting unit (3) that sets an energy-saving control level for an air-conditioning device on the basis of the amount of change in the intake temperature of the air-conditioning device for a fixed period of time immediately after the air-conditioning device is stopped; and an energy-saving control unit (5) that performs energy-saving control of the air conditioner on the basis of the energy-saving control level.

Description

Technical Field

[0001] The present disclosure relates to an air conditioning control device and an air conditioning control method. Background Art

[0002] In recent years, due to the growing concern about global warming and reducing the environmental load, the need for energy conservation in building facilities has increased. In particular, air conditioners, which account for the majority of power consumption in building facilities, are required to be highly energy-efficient. In addition to reducing power consumption, factors to be considered when performing energy conservation in air conditioners include the comfort of people in the room. In Patent Document 1, the control setting values ​​(room temperature setting value, humidity setting value, and air volume setting value) of the air conditioner for energy conservation are determined so that PMW (Predicted Mean Vote), which is an indoor thermal comfort index, falls within a comfortable range.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 9-217953 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In order to calculate PMV, it is necessary to understand the indoor environment, so multiple environmental measuring devices such as thermometers, mean radiation thermometers, air velocity meters, and hygrometers must be installed indoors. However, there are few office buildings that have these multiple measuring devices installed in all rooms for management, and it is difficult to determine the air conditioning control settings that take PMV into consideration and achieve energy saving in all office buildings.

[0008] Therefore, an object of the present disclosure is to provide an air conditioning control device and an air conditioning control method that can perform energy-saving control while suppressing a decrease in comfort even in a building where a plurality of environment measuring devices are not installed.

[0009] Means used to solve problems

[0010] The air conditioning control device disclosed in the present invention controls an air conditioning device and comprises: a control level setting unit, which sets the energy-saving control level of the air conditioning device based on the change in the intake temperature of the air conditioning device within a fixed time after the air conditioning device has just been stopped; and an energy-saving control unit, which performs energy-saving control of the air conditioning device based on the energy-saving control level.

[0011] The air conditioning control method disclosed herein for controlling an air conditioning device comprises the following steps: setting an energy-saving control level of the air conditioning device based on a change in the suction temperature of the air conditioning device within a fixed time after the air conditioning device has just been stopped; and executing energy-saving control of the air conditioning device based on the energy-saving control level.

[0012] Effects of the Invention

[0013] According to the present disclosure, even in a building where a plurality of environmental measuring devices are not installed, energy-saving control that suppresses a decrease in comfort can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a diagram showing the configuration of the air-conditioning control device 100 according to the first embodiment.

[0015] Figure 2 This is a flowchart showing the processing procedure of the air-conditioning control device 100 according to the first embodiment.

[0016] Figure 3 This is a diagram showing the configuration of an air-conditioning control device 100A according to the second embodiment.

[0017] Figure 4 This is a flowchart showing the processing procedure of the air-conditioning control device 100A according to the second embodiment.

[0018] Figure 5 This is a diagram showing the configuration of an air-conditioning control device 100B according to the third embodiment.

[0019] Figure 6 This is a flowchart showing the processing procedure of the air-conditioning control device 100B according to the third embodiment.

[0020] Figure 7 This is a diagram showing a configuration of an air-conditioning control device 100C according to the fourth embodiment.

[0021] Figure 8 This is a flowchart showing the processing procedure of the air-conditioning control device 100C according to the fourth embodiment.

[0022] Fig. 9 This is a diagram showing the configuration of an air-conditioning control device 100D according to the fifth embodiment.

[0023] Fig.10 This is a flowchart showing the processing procedure of the air-conditioning control device 100D according to the fifth embodiment.

[0024] Fig.11 It is a diagram showing the configuration of an air conditioning system 1000 according to the embodiment. DETAILED DESCRIPTION

[0025] Implementation method 1.

[0026] In this embodiment, the air conditioning control device sets the energy-saving control level based on the amount of change in the air conditioning device's intake temperature for a fixed time period immediately after the air conditioning device is stopped. For example, it can be determined that a room in which the amount of change in the air conditioning device's intake temperature immediately after the air conditioning device is stopped is large is a room with low thermal insulation. For a room with low thermal insulation, if the air conditioning device is operated in an energy-saving manner, the comfort level is likely to deteriorate. Therefore, the air conditioning control device sets a weaker energy-saving control level.

[0027] Figure 1 This is a diagram showing the configuration of the air-conditioning control device 100 according to the first embodiment.

[0028] The air conditioning control device 100 includes an air conditioning temperature information storage unit 1 , an air conditioning temperature change amount calculation unit 2 , a control level setting unit 3 , and an energy-saving control unit 5 .

[0029] The air-conditioning temperature information storage unit 1 stores information indicating the suction temperature of the air-conditioning device at each time. The suction temperature of the air-conditioning device can be collected by a temperature sensor installed at the suction port of the air-conditioning device.

[0030] The air conditioning temperature change amount calculation unit 2 calculates the change amount of the air conditioning device's intake temperature for a fixed time period immediately after the air conditioning device is stopped. For example, the air conditioning temperature change amount calculation unit 2 calculates the following five changes ΔT(1), ΔT(2), ΔT(3), ΔT(4), and ΔT(5).

[0031] Assume that the temperature just after the air-conditioning equipment stops is T0, the suction temperature of the air-conditioning equipment 3 minutes after the air-conditioning equipment stops is T3, the suction temperature of the air-conditioning equipment 6 minutes after the air-conditioning equipment stops is T6, the suction temperature of the air-conditioning equipment 9 minutes after the air-conditioning equipment stops is T9, the suction temperature of the air-conditioning equipment 15 minutes after the air-conditioning equipment stops is T15, and the suction temperature of the air-conditioning equipment 30 minutes after the air-conditioning equipment stops is T30.

[0032] ΔT(1)=(T3-T0) / 3···(1)

[0033] ΔT(2)=(T6-T0) / 6···(2)

[0034] ΔT(3)=(T9-T0) / 9···(3)

[0035] ΔT(4)=(T15-T0) / 15···(4)

[0036] ΔT(5)=(T30-T0) / 30···(5)

[0037] The control level setting unit 3 sets the energy-saving control level of the air-conditioning equipment based on the change amount of the suction temperature of the air-conditioning equipment during a fixed time immediately after the air-conditioning equipment has just stopped. For example, when ΔT(1) to ΔT(i) are less than the threshold value TH and ΔT(i + 1) is greater than or equal to the threshold value TH, the control level setting unit 3 sets the energy-saving control level of the air-conditioning equipment to level L(i).

[0038] Level L(1) means that the stop time of the air-conditioning equipment within 30 minutes is 0 minutes. Level L(2) means that the stop time of the air-conditioning equipment within 30 minutes is 3 minutes. That is, the air-conditioning operation time within 30 minutes is 27 minutes, and the stop time of the air-conditioning equipment is 3 minutes. Level L(3) means that the stop time of the air-conditioning equipment within 30 minutes is 6 minutes. That is, the air-conditioning operation time within 30 minutes is 24 minutes, and the stop time of the air-conditioning equipment is 6 minutes. Level L(4) means that the stop time of the air-conditioning equipment within 30 minutes is 9 minutes. That is, the air-conditioning operation time within 30 minutes is 21 minutes, and the stop time of the air-conditioning equipment is 9 minutes. Level L(5) means that the stop time of the air-conditioning equipment within 30 minutes is 15 minutes. That is, the air-conditioning operation time within 30 minutes is 15 minutes, and the stop time of the air-conditioning equipment is 15 minutes. Level L(6) means that the stop time of the air-conditioning equipment within 30 minutes is 30 minutes. That is, the air-conditioning operation time within 30 minutes is 0 minutes, and the stop time of the air-conditioning equipment is 30 minutes.

[0039] For example, when ΔT(1) < TH, ΔT(2) < TH, and ΔT(3) ≥ TH, the energy-saving control level of the air-conditioning equipment is set to level L(2).

[0040] The threshold value TH can be set to the following THs in summer and the following THw in winter, for example. When the room temperature immediately after the air-conditioning equipment has just stopped is set to Tx, the comfortable range temperature in summer is set to Ts (for example, 26°C), and the comfortable range temperature in winter is set to Tw (for example, 22°C), THs and THw are represented by the following formulas. Here, |A| represents the absolute value of A.

[0041] THs = |Tx - Ts| ··· (6)

[0042] THw = |Tx - Tw| ··· (7)

[0043] It is also possible to calculate the comfortable range temperature based on PMV. For example, it is also possible to set the temperature corresponding to 0.5 < PMV < 0.5 as the comfortable range temperature.

[0044] The energy-saving control unit 5 can perform energy-saving control of the air-conditioning equipment based on the energy-saving control level. For example, the higher the energy-saving control level, the longer the energy-saving control unit 5 stops the air-conditioning equipment within a specified time (for example, 30 minutes). Specifically, when the energy-saving control level is level L(1), L(2), L(3), L(4), L(5), or L(6), the energy-saving control unit 5 can set the stop time of the air-conditioning equipment within 30 minutes to 0 minutes, 3 minutes, 6 minutes, 9 minutes, 15 minutes, or 30 minutes.

[0045] The energy-saving control unit 5 may also realize energy saving according to the long-term plan based on the set energy-saving control level in the following manner.

[0046] The energy-saving control unit 5 calculates the target power consumption of the target air-conditioning device per day when the energy-saving control of the target air-conditioning device is performed in a fixed period according to the set energy-saving control level. More specifically, the energy-saving control unit 5 calculates the target power consumption of the target air-conditioning device in a fixed period (for example, 1 year) when the energy-saving control of the target air-conditioning device is performed in a fixed period according to the set energy-saving control level. The energy-saving control unit 5 calculates the target power consumption of the target air-conditioning device per day based on the target power consumption of the target air-conditioning device in the fixed period.

[0047] For example, when the power consumption of the target air-conditioning equipment last year is denoted as Pp, the coefficient relative to the energy-saving control level L(k) of the air-conditioning equipment is denoted as a(k), the number of operating days of the target air-conditioning equipment in a year is ND, and the energy-saving control level of the set air-conditioning equipment is denoted as L(i), the energy-saving control unit 5 calculates the target power reduction ΔPc of the target air-conditioning equipment in a year, the target power consumption Pt of the target air-conditioning equipment in a year, and the target power consumption Pd of the target air-conditioning equipment per day according to the following formula.

[0048] a(k)<a(k+1)···(8)

[0049] ΔPc=Pp×a(i)···(9)

[0050] Pt=Pp-ΔPc=Pp{1-a(i)}···(10)

[0051] Pd=Pt / ND···(11)

[0052] The target air conditioner is operated without energy-saving control. If the power consumption of the target air conditioner on that day is expected to exceed the target power consumption Pd of the target air conditioner per day or the power consumption of the target air conditioner on that day exceeds the target power consumption Pd of the target air conditioner per day, the energy-saving control unit 5 operates the target air conditioner under energy-saving control according to the set energy-saving control level L(i). By operating the air conditioner for one year in this way, the target power reduction ΔPc of the target air conditioner for one year can be achieved.

[0053] The case where the power consumption of the target air conditioner on that day is expected to exceed the target power consumption Pd of the target air conditioner every day, for example, means that the difference dP between the power consumption of the target air conditioner on that day and the target power consumption Pd is below a threshold, etc. The threshold may also be changed based on the current time.

[0054] Figure 2 This is a flowchart showing the processing procedure of the air-conditioning control device 100 according to the first embodiment.

[0055] In step S101 , when the energy-saving control level needs to be set or changed, the process proceeds to step S102 .

[0056] In step S102 , the air-conditioning temperature information storage unit 1 stores the air-conditioning equipment's intake temperature information transmitted from the temperature sensor disposed at the intake port of the air-conditioning equipment.

[0057] In step S103, the air-conditioning temperature change amount calculation unit 2 calculates the change amount of the air-conditioning device's intake temperature immediately after the air-conditioning device is stopped.

[0058] In step S104 , the control level setting unit 3 sets the energy-saving control level.

[0059] In step S105 , the energy-saving control unit 5 calculates the target power consumption Pd of the target air-conditioning equipment per day when the energy-saving control level set in step S104 is applied.

[0060] In step S106, when the target air-conditioning equipment is operated without performing energy-saving control and the power consumption of the target air-conditioning equipment on that day is expected to exceed the target power consumption Pd of the target air-conditioning equipment per day, the energy-saving control unit 5 operates the target air-conditioning equipment under energy-saving control according to the energy-saving control level set in step S104.

[0061] According to the present embodiment, by setting the energy-saving control level using information on the suction temperature of the air conditioner, even in an office that does not have a plurality of environmental measuring devices and cannot calculate PWV, it is possible to suppress a decrease in comfort due to energy-saving control.

[0062] Implementation method 2.

[0063] In this embodiment, the air conditioning control device sets the energy conservation control level of the air conditioning device based on information on the average occupancy time of the room where the air conditioning device is installed, in addition to the change in the suction temperature of the air conditioning device. For example, when the time spent in the room is short, it can be assumed that the impact of the deterioration of comfort caused by the energy conservation control is small, so it is considered that there is no problem even if a strong energy conservation control level is set. The average occupancy time of the room can be calculated based on the entry and exit history information of the entry and exit management system.

[0064] Figure 3 1 is a diagram showing a configuration of an air conditioning control device 100A according to Embodiment 2. The following are differences between the air conditioning control device 100A according to Embodiment 2 and the air conditioning control device 100 according to Embodiment 1.

[0065] The air conditioning control device 100A further includes an entry / exit information storage unit 6 and an occupancy time calculation unit 7. The air conditioning control device 100A includes a control level setting unit 3A instead of the control level setting unit 3 of the first embodiment.

[0066] The entry and exit information storage unit 6 stores entry and exit information of the entry and exit history of each person in each room in the building.

[0067] The room time calculation unit 7 calculates the average room time of the room where the target air conditioner is installed based on the entry and exit history information stored in the entry and exit information storage unit 6. When the users of room R are three persons, A, B, and C, the average room time of A on working days, the average room time of B on working days, and the average room time of C on working days can be averaged to obtain the average room time of room R. Even when a person temporarily leaves the room, it can be considered that the room state has not ended and the room time continues. When a person returns to the room after leaving the room for more than a specified time, the room time before leaving the room and the room time after returning to the room can be summed to obtain the room time of the working day.

[0068] Control level setting unit 3A determines an energy-saving control level corresponding to the amount of change in the air conditioner's intake temperature for a fixed time period immediately after the air conditioner is stopped, similarly to Embodiment 1. Control level setting unit 3A corrects the determined energy-saving control level based on the average occupancy time of the room where the target air conditioner is installed.

[0069] When the average occupancy time in the room is less than a threshold value (e.g., 30 minutes), the control level setting unit 3A determines that it is not necessary to strictly achieve comfort, and therefore sets the energy-saving control level of the air conditioner to a level one level higher than the energy-saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner has just been stopped. For example, when the energy-saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner has just been stopped is L(2), the control level is corrected to L(3).

[0070] When the average occupancy time in the room exceeds a threshold value (for example, 30 minutes), the control level setting unit 3A determines that there is a high possibility of performing long-term work and that comfort needs to be achieved, and therefore sets the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature for a fixed time after the air-conditioning device is stopped as the energy-saving control level of the air-conditioning device. For example, when the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature for a fixed time after the air-conditioning device is stopped is L(2), the control level is maintained at L(2).

[0071] Figure 4 This is a flowchart showing the processing procedure of the air-conditioning control device 100A according to the second embodiment.

[0072] Steps S201-S203, S207-S208 and Figure 2 Steps S101 to S103 and S105 to S106 are the same, and therefore, description thereof will not be repeated.

[0073] In step S204 , the entry and exit information storage unit 6 stores entry and exit information indicating the entry and exit history of each person in each room in the building.

[0074] In step S205 , the occupancy time calculation unit 7 calculates the average occupancy time TX in the room where the target air conditioner is installed based on the entry and exit information stored in the entry and exit information storage unit 6 .

[0075] In step S206, control level setting unit 3A determines energy-saving control level L(i) based on the amount of change in the air-conditioning device's intake temperature immediately after the air-conditioning device is stopped, similarly to the first embodiment.

[0076] When the average indoor time TX is less than the threshold value, the control level setting unit 3A sets the energy-saving control level L(i+1) which is one level higher than the energy-saving control level L(i) based on the amount of change in the suction temperature of the air conditioner as the energy-saving control level of the air conditioner. When the average indoor time TX exceeds the threshold value, the control level setting unit 3A sets the energy-saving control level L(i) based on the amount of change in the suction temperature of the air conditioner as the energy-saving control level of the air conditioner.

[0077] According to the present embodiment, the determination materials for setting the energy-saving control level are increased, thereby making it possible to make a more appropriate determination in consideration of the degree of influence of the deterioration in comfort.

[0078] Implementation method 3.

[0079] In this embodiment, the air conditioning control device sets the energy conservation control level of the air conditioning device based on the information of the annual utilization rate of the room in addition to the change amount of the suction temperature of the air conditioning device. For example, when the annual utilization rate of the room is low, it can be assumed that the impact of the deterioration of comfort caused by energy conservation is small, so it is considered that there is no problem in setting a strong energy conservation control level. The annual utilization rate of the room can be calculated based on the operation information of the building facilities (air conditioning equipment and lighting equipment).

[0080] Figure 5 1 is a diagram showing a configuration of an air conditioning control device 100B according to Embodiment 3. The following are differences between the air conditioning control device 100B according to Embodiment 3 and the air conditioning control device 100 according to Embodiment 1.

[0081] The air conditioning control device 100B further includes a facility operation information storage unit 8 and a usage rate calculation unit 9. The air conditioning control device 100B includes a control level setting unit 3B instead of the control level setting unit 3 of the first embodiment.

[0082] The facility operation information storage unit 8 stores facility operation information indicating the operation history of building facilities (air conditioners and lighting devices) in each room in the building.

[0083] The usage rate calculation unit 9 calculates the usage rate of the room where the target air conditioner is installed based on the facility operation information stored in the facility operation information storage unit 8 .

[0084] For example, the usage rate calculation unit 9 calculates the annual usage rate of the room where the target air conditioner is installed. The annual usage rate of the room where the target air conditioner is installed is a value obtained by dividing the one-year usage time T1 of the room where the target air conditioner is installed by the one-year usage time T2 of the building containing the room. The one-year usage time T1 of the room where the target air conditioner is installed refers to the time that the facilities (air conditioner and / or lighting equipment) are running in the room where the target air conditioner is installed within one year. The one-year usage time T2 of the building refers to the time that the facilities (air conditioner and / or lighting equipment) are running in any room in the building within one year.

[0085] Control level setting unit 3B determines an energy-saving control level corresponding to the amount of change in the air conditioner's intake temperature for a fixed time period immediately after the air conditioner is stopped, similarly to Embodiment 1. Control level setting unit 3 corrects the determined energy-saving control level based on the utilization rate of the room where the target air conditioner is installed.

[0086] When the utilization rate of the room is below a threshold value (e.g., 50%), the room is less utilized. Therefore, if the building as a whole is considered, even if the energy saving rate is increased, the impact on the occupants is small. Therefore, it is considered that there is no need to strictly achieve comfort. Therefore, the energy saving control level of the air conditioner is set to a level higher than the energy saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner is stopped. For example, when the energy saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner is stopped is L(2), the control level is corrected to L(3).

[0087] When the utilization rate of the room exceeds a threshold value (e.g., 50%), the control level setting unit 3B considers that there is a high possibility of executing a long-term business and that comfort needs to be achieved, and therefore sets the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature for a fixed time after the air-conditioning device has just been stopped as the energy-saving control level of the air-conditioning device. For example, when the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature for a fixed time after the air-conditioning device has just been stopped is L(2), the control level is maintained at L(2).

[0088] Figure 6 This is a flowchart showing the processing procedure of the air-conditioning control device 100B according to the third embodiment.

[0089] Steps S301-S303, S307-S308 and Figure 2 Steps S101 to S103 and S105 to S106 are the same, and therefore, description thereof will not be repeated.

[0090] In step S304, the facility operation information storage unit 8 stores the operation information of the facilities (air conditioning equipment and lighting equipment) in the building.

[0091] In step S305 , the usage rate calculation unit 9 calculates the usage rate R1 of the room where the target air conditioner is installed based on the operation information stored in the facility operation information storage unit 8 .

[0092] In step S306, control level setting unit 3B obtains energy-saving control level L(i) based on the amount of change in the air-conditioning device's intake temperature immediately after the air-conditioning device stops, similarly to the first embodiment.

[0093] When the usage rate R1 of the room where the target air conditioner is installed is less than the threshold value, the control level setting unit 3B sets the energy-saving control level L(i+1) which is one level higher than the energy-saving control level L(i) based on the amount of change in the suction temperature of the air conditioner as the energy-saving control level of the air conditioner. When the usage rate R1 of the room where the target air conditioner is installed exceeds the threshold value, the control level setting unit 3B sets the energy-saving control level L(i) based on the amount of change in the suction temperature of the air conditioner as the energy-saving control level of the air conditioner.

[0094] According to the present embodiment, the determination materials for setting the energy-saving control level are increased, thereby making it possible to make a more appropriate determination in consideration of the degree of influence of the deterioration in comfort.

[0095] Implementation method 4.

[0096] In this embodiment, the air conditioning control device sets the energy conservation control level of the air conditioning device based on the information of the male-female ratio of the occupants in addition to the change amount of the suction temperature of the air conditioning device. When the male occupancy rate is high, the air conditioning control device generates more heat, so it can assume that the influence of the deterioration of comfort is greater in summer, so it sets a weaker energy conservation control level, and it can assume that the influence of the deterioration of comfort is smaller in winter, so it sets a stronger energy conservation control level. The male-female ratio of the occupants can be calculated based on the attribute information of the occupants included in the entry and exit history information of the entry and exit management system.

[0097] Figure 7 1 is a diagram showing a configuration of an air conditioning control device 100C according to Embodiment 4. The following are differences between the air conditioning control device 100C according to Embodiment 4 and the air conditioning control device 100 according to Embodiment 1.

[0098] The air conditioning control device 100C further includes an entry / exit information storage unit 6C and a male / female ratio calculation unit 10. The air conditioning control device 100C includes a control level setting unit 3C instead of the control level setting unit 3 of the first embodiment.

[0099] The entry and exit information storage unit 6C stores entry and exit information indicating the entry and exit history of each person in each room in the building and the gender of each person.

[0100] The male-female ratio calculation unit 10 calculates the male-female ratio of people using the room where the target air conditioner is installed, based on the entry and exit information stored in the entry and exit information storage unit 6C.

[0101] Control level setting unit 3C determines an energy-saving control level corresponding to the amount of change in the air conditioner's intake temperature a fixed time after the air conditioner is stopped, similarly to Embodiment 1, and corrects the determined energy-saving control level based on the gender ratio of people in the room where the target air conditioner is installed.

[0102] When the ratio of males to people using the room is higher than the ratio of females, the heat generated by the human body is greater, and therefore, it is considered that the comfort is deteriorated in summer, so the energy-saving control level of the air-conditioning device in summer is set to a level lower than the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature at a fixed time after the air-conditioning device has just been stopped. For example, when the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature at a fixed time after the air-conditioning device has just been stopped is L(2), the control level is corrected to L(1). When the ratio of males to people using the room is higher than the ratio of females, the control level setting unit 3C sets the energy-saving control level corresponding to the amount of change in the air-conditioning device's suction temperature at a fixed time after the air-conditioning device has just been stopped to an energy-saving control level other than summer for the air-conditioning device. Here, summer can be set to, for example, the three months of June, July, and August.

[0103] When the ratio of female people using the room is higher than the ratio of male people, the heat generated by the human body is less, and therefore, it is considered that the comfort is deteriorated in winter. Therefore, the control level setting unit 3C sets the energy-saving control level of the air-conditioning device in winter to a level that is one level lower than the energy-saving control level corresponding to the change in the suction temperature of the air-conditioning device at a fixed time after the air-conditioning device has just been stopped. For example, when the energy-saving control level corresponding to the change in the suction temperature of the air-conditioning device at a fixed time after the air-conditioning device has just been stopped is L(2), the control level is corrected to L(1). When the ratio of female people using the room is higher than the ratio of male people, the control level setting unit 3C sets the energy-saving control level corresponding to the change in the suction temperature of the air-conditioning device at a fixed time after the air-conditioning device has just been stopped to an energy-saving control level other than the winter season for the air-conditioning device. Here, winter can be, for example, the three months of December, January, and February.

[0104] When the ratio of female and male users of the room is equal, the control level setting unit 3C sets the energy-saving control level corresponding to the change in the air conditioner's suction temperature for a fixed time period immediately after the air conditioner is stopped as the all-season energy-saving control level of the air conditioner.

[0105] In this embodiment, when the power consumption of the target air-conditioning equipment last year is Pp, the coefficient relative to the energy-saving control level L(k) of the air-conditioning equipment is a(k), the number of operating days of the target air-conditioning equipment in one year is ND, the energy-saving control level of the air-conditioning equipment set except summer and winter is L(i), the energy-saving control level of the air-conditioning equipment set in summer is L(s), and the energy-saving control level of the air-conditioning equipment set in winter is L(w), the energy-saving control unit 5C calculates the target power reduction ΔPc of the target air-conditioning equipment in one year, the target power consumption Pt of the target air-conditioning equipment in one year, and the target power consumption Pd of the target air-conditioning equipment per day according to the following formula.

[0106] a(k)<a(k+1)···(8)

[0107] ΔPc=(1 / 2)×Pp×a(i)+(1 / 4)×Pp×a(s)+(1 / 4)Pp×a(w)···(9A)

[0108] Pt=Pp-ΔPc···(10)

[0109] Pd=Pt / ND···(11)

[0110] Figure 8 This is a flowchart showing the processing procedure of the air-conditioning control device 100C according to the fourth embodiment.

[0111] Steps S401 to S403, S408 and Figure 2 Steps S101 to S103 and S106 are the same, so their description will not be repeated.

[0112] In step S404, the entry and exit information storage unit 6C stores entry and exit information indicating the entry and exit history of each person in each room in the building and the gender of each person.

[0113] In step S405 , the male-female ratio calculation unit 10 calculates the male-female ratio of people using the room where the target air conditioner is installed based on the entry and exit information stored in the entry and exit information storage unit 6C.

[0114] In step S406, the control level setting unit 3C obtains the energy-saving control level L(i) based on the amount of change in the air-conditioning device's intake temperature immediately after the air-conditioning device is stopped, similarly to the first embodiment.

[0115] When the ratio of male people using the room where the target air-conditioning equipment is installed is higher than the ratio of female people, the control level setting unit 3C sets the energy-saving control level L(i-1) which is one level lower than the energy-saving control level L(i) based on the change in the suction temperature of the air-conditioning equipment as the energy-saving control level for the air-conditioning equipment in summer.

[0116] When the ratio of female people using the room where the target air-conditioning equipment is installed is higher than the ratio of male people, the control level setting unit 3C sets the energy-saving control level L(i-1) which is one level lower than the energy-saving control level L(i) based on the change in the suction temperature of the air-conditioning equipment as the energy-saving control level for the air-conditioning equipment in winter.

[0117] The control level setting unit 3C sets the energy-saving control level L(i) based on the change in the suction temperature of the air-conditioning equipment as the energy-saving control level of the air-conditioning equipment except for summer when the ratio of male occupants in the room where the target air-conditioning equipment is installed is higher than the ratio of female occupants, the energy-saving control level of the air-conditioning equipment except for winter when the ratio of female occupants in the room where the target air-conditioning equipment is installed is higher than the ratio of male occupants, and the energy-saving control level of the air-conditioning equipment in all seasons when the ratio of male occupants in the room where the target air-conditioning equipment is installed is equal to the ratio of female occupants.

[0118] In step S407, the energy-saving control unit 5C calculates the target power consumption Pd of the target air-conditioning equipment per day when the energy-saving control level set in step S406 is applied.

[0119] According to the present embodiment, by taking into account the degree of influence of deterioration in comfort caused by the different attributes of the room occupants, it is possible to set an energy-saving control level suitable for each room for each season.

[0120] Implementation method 5.

[0121] In this embodiment, the air conditioning control device sets the energy-saving control level of the air conditioning device based on the needs of the room user in addition to the change amount of the air conditioning device's intake temperature. The needs of the room user can be collected through a regular questionnaire survey.

[0122] Fig. 9 1 is a diagram showing a configuration of an air conditioning control device 100D according to Embodiment 5. The following are differences between the air conditioning control device 100D according to Embodiment 5 and the air conditioning control device 100 according to Embodiment 1.

[0123] The air conditioning control device 100D further includes a demand storage unit 11 and an evaluation result extraction unit 13. The air conditioning control device 100D includes a control level setting unit 3D instead of the control level setting unit 3 of the first embodiment.

[0124] The demand storage unit 11 stores the demand related to the comfort of each person using the room where the target air conditioner is installed. The demand storage unit 11 stores the results of periodic questionnaires as the demand. The questionnaire results include multiple levels of evaluation results related to comfort (comfortable, slightly comfortable, average, slightly uncomfortable, uncomfortable).

[0125] The evaluation result extraction unit 13 extracts the evaluation result related to the comfort of the room where the air conditioner is installed based on the questionnaire survey results stored in the demand storage unit 11. When the demand storage unit 11 stores the questionnaire survey results of multiple persons, the evaluation result extraction unit 13 can set the representative of the evaluation results related to the comfort of the multiple persons as the evaluation related to the comfort of the room.

[0126] The representative of the evaluation results of multiple people can be obtained, for example, in the following manner. Assign integer values ​​of 1 to 5 to the five levels of evaluation. It is possible to assign "5" to "comfortable", "4" to "slightly comfortable", "3" to "normal", "2" to "slightly uncomfortable", and "1" to "uncomfortable", and calculate the average of the evaluations of multiple people, and set the evaluation result with the integer value closest to the average as the representative of the evaluation results of the multiple people. For example, when the average value of the evaluation results of multiple people is "4.6", "comfortable" which represents the integer value "5" closest to "4.6" can be used as the representative of the evaluation results of the multiple people. Alternatively, the evaluation result with the highest frequency can also be used as the representative of the evaluation results of multiple people.

[0127] Control level setting unit 3D determines an energy-saving control level corresponding to the amount of change in the air conditioner's intake temperature for a fixed time period immediately after the air conditioner is stopped, similarly to Embodiment 1. Control level setting unit 3D corrects the determined energy-saving control level based on the evaluation result of the comfort level of the room where the target air conditioner is installed.

[0128] When the evaluation result of the comfort of the room is the highest "comfortable", the control level setting unit 3D considers that there will be no problem even if the energy-saving control level is increased, and therefore sets the energy-saving control level of the air conditioner to a level higher than the energy-saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner has just stopped. For example, when the energy-saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner has just stopped is L(2), the control level is corrected to L(3).

[0129] When the evaluation result of the comfort of the room is the lowest "uncomfortable", the control level setting unit 3D considers that the comfort may be impaired by the energy-saving control, and therefore sets the energy-saving control level of the air conditioner to a level lower than the energy-saving control level corresponding to the amount of change in the suction temperature of the air conditioner for a fixed time after the air conditioner is stopped. For example, when the energy-saving control level corresponding to the amount of change in the suction temperature of the air conditioner for a fixed time after the air conditioner is stopped is L(2), the control level is corrected to L(1).

[0130] When the evaluation result of the comfort of the room is an intermediate "slightly comfortable", "average" or "slightly uncomfortable", the control level setting unit 3D sets the energy-saving control level of the air conditioner to an energy-saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner has just been stopped. For example, when the energy-saving control level corresponding to the amount of change in the air conditioner's suction temperature for a fixed time after the air conditioner has just been stopped is L(2), the control level is maintained at L(2).

[0131] Fig.10 This is a flowchart showing the processing procedure of the air-conditioning control device 100D according to the fifth embodiment.

[0132] Steps S501-S503, S507-S508 and Figure 2 Steps S101 to S103 and S105 to S106 are the same, and therefore, description thereof will not be repeated.

[0133] In step S504 , the demand storage unit 11 stores the demand related to the comfort of each person who uses the room where the target air conditioner is installed.

[0134] In step S505 , the evaluation result extraction unit 13 extracts the evaluation result related to the comfort of the room where the air conditioner is installed from the questionnaire survey results stored in the demand storage unit 11 .

[0135] In step S506, control level setting unit 3D obtains energy-saving control level L(i) based on the amount of change in the air-conditioning device's intake temperature immediately after the air-conditioning device stops, similarly to the first embodiment.

[0136] When the evaluation result related to the comfort of the room indicates "comfortable", the control level setting unit 3D sets the energy-saving control level L(i+1) of the air conditioner which is one level higher than the energy-saving control level L(i) based on the change in the suction temperature of the air conditioner.

[0137] When the evaluation result related to the comfort of the room indicates "uncomfortable", the control level setting unit 3D sets the energy-saving control level L(i-1) of the air conditioner which is one level lower than the energy-saving control level L(i) based on the change in the suction temperature of the air conditioner.

[0138] When the evaluation result of the room comfort is "slightly comfortable", "average" or "slightly uncomfortable", the control level setting unit 3D sets the energy-saving control level L(i) based on the change in the suction temperature of the air conditioner as the energy-saving control level of the air conditioner.

[0139] According to the present embodiment, the determination materials for setting the energy-saving control level are increased, thereby making it possible to make a more appropriate determination in consideration of the degree of influence of the deterioration in comfort.

[0140] (Air conditioning system)

[0141] Fig.11 It is a diagram showing the configuration of an air conditioning system 1000 according to the embodiment.

[0142] The air conditioning system 1000 includes a main storage device 25 , an auxiliary storage device 26 , an air conditioner 21 , a processor 24 , a temperature sensor 22 , and a communication interface 23 , which are connected via a bus 27 .

[0143] The main storage device 25 stores an air-conditioning control program and the like.

[0144] The auxiliary storage device 26 stores data and the like generated by execution of the processor 24 .

[0145] The air conditioner 21 performs energy-saving control.

[0146] The processor 24 executes the functions of the air conditioning control device described in Embodiments 1 to 5 by executing the air conditioning control program stored in the main storage device 25 .

[0147] The temperature sensor 22 is disposed at the air inlet of the air conditioner 21, and detects the air inlet temperature of the air conditioner 21. The temperature sensor 22 transmits information indicating the detected air inlet temperature to the processor 24.

[0148] The communication interface 23 performs data communication with external devices.

[0149] The embodiments disclosed this time are illustrative in all aspects and should not be considered as limiting. The scope of the present disclosure is indicated by the claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0150] Description of Reference Numerals

[0151] 1 air conditioning temperature information storage unit, 2 air conditioning temperature change calculation unit, 3, 3A, 3B, 3C, 3D control level setting unit, 5, 5C energy saving control unit, 6, 6C entry and exit information storage unit, 7 indoor time calculation unit, 8 facility operation information storage unit, 9 usage rate calculation unit, 10 male-female ratio calculation unit, 11 demand storage unit, 13 evaluation result extraction unit, 21 air conditioning equipment, 22 temperature sensor, 23 communication interface, 24 processor, 25 main storage device, 26 auxiliary storage device, 27 bus, 100, 100A, 100B, 100C, 100D air conditioning control device, 1000 air conditioning system.

Claims

1. An air conditioning control device, which controls air conditioning equipment, wherein: The air conditioning control device comprises: a control level setting unit that sets an energy-saving control level of the air conditioner based on an amount of change in a suction temperature of the air conditioner within a fixed time period immediately after the air conditioner is stopped; as well as An energy-saving control unit performs energy-saving control of the air-conditioning equipment based on the energy-saving control level.

2. The air conditioning control device according to claim 1, wherein: The energy-saving control unit calculates a target power consumption of the air-conditioning device per day when the energy-saving control of the air-conditioning device is performed within a fixed period according to the energy-saving control level. The air-conditioning device is operated without performing the energy-saving control. When the power consumption on that day is expected to exceed the target power consumption of the air-conditioning device per day or when the power consumption on that day exceeds the target power consumption of the air-conditioning device per day, the energy-saving control unit operates the air-conditioning device according to the energy-saving control level.

3. The air conditioning control device according to claim 2, wherein: The energy-saving control unit calculates a target power consumption of the air-conditioning device during a fixed period when energy-saving control is performed on the air-conditioning device during the fixed period according to the energy-saving control level, and calculates the target power consumption of the air-conditioning device per day based on the target power consumption of the air-conditioning device during the fixed period.

4. The air conditioning control device according to any one of claims 1 to 3, wherein: The energy-saving control unit stops the air conditioner for a longer period of time within a predetermined time as the energy-saving control level is higher.

5. The air conditioning control device according to any one of claims 1 to 4, wherein: The air conditioning control device includes a room occupancy time calculation unit that calculates an average room occupancy time in a room where the air conditioning equipment is installed. The control level setting unit determines an energy-saving control level corresponding to a change in the air-conditioning device's intake temperature for a fixed time period immediately after the air-conditioning device is stopped, and corrects the determined energy-saving control level based on an average occupancy time in the room.

6. The air conditioning control device according to claim 5, wherein: The control level setting unit sets the energy-saving control level of the air-conditioning device to a level higher than the determined energy-saving control level when the average occupancy time in the room is equal to or less than a threshold value.

7. The air conditioning control device according to any one of claims 1 to 4, wherein: The air conditioning control device includes a usage rate calculation unit that calculates a usage rate of a room in which the air conditioning equipment is installed. The control level setting unit determines an energy-saving control level corresponding to a change in a suction temperature of the air conditioner for a fixed time period immediately after the air conditioner is stopped, and corrects the determined energy-saving control level based on a utilization rate of the room.

8. The air conditioning control device according to claim 7, wherein: The control level setting unit sets the energy-saving control level of the air-conditioning equipment to a level higher than the determined energy-saving control level when the utilization rate of the room is equal to or lower than a threshold value.

9. The air conditioning control device according to any one of claims 1 to 4, wherein: The air conditioning control device includes a male-female ratio calculation unit that calculates a male-female ratio of people using a room in which the air conditioning equipment is installed. The control level setting unit determines an energy-saving control level corresponding to a change in an air-conditioner's intake temperature for a fixed time period immediately after the air-conditioner is stopped, and corrects the determined energy-saving control level based on a gender ratio of people using the room.

10. The air conditioning control device according to claim 9, wherein: The control level setting unit sets the energy-saving control level of the air conditioner in summer to a level higher than the determined energy-saving control level when the ratio of male users of the room is higher than the ratio of female users.

11. The air conditioning control device according to claim 9, wherein: The control level setting unit sets the energy-saving control level of the air conditioner in winter to a level lower than the determined energy-saving control level when the ratio of female users of the room is higher than the ratio of male users.

12. The air conditioning control device according to any one of claims 1 to 4, wherein: The air conditioning control device includes an evaluation result extraction unit that extracts an evaluation result related to the comfort of a room in which the air conditioning equipment is installed. The control level setting unit determines an energy-saving control level corresponding to a change in a suction temperature of the air conditioner within a fixed time period immediately after the air conditioner is stopped, and corrects the determined energy-saving control level based on an evaluation result of the comfort level of the room.

13. The air conditioning control device according to claim 12, wherein: The evaluation result extraction unit obtains a plurality of levels of evaluation results related to the comfort of the room. The control level setting unit sets the energy-saving control level of the air-conditioning equipment to a level higher than the determined energy-saving control level when the comfort evaluation is the highest. The control level setting unit sets the energy-saving control level of the air-conditioning equipment to a level lower than the determined energy-saving control level when the comfort evaluation is the lowest.

14. An air conditioning control method, which controls an air conditioning device, wherein: The air conditioning control method comprises the following steps: setting an energy-saving control level of the air conditioner based on an amount of change in the suction temperature of the air conditioner within a fixed time immediately after the air conditioner is stopped; and Based on the energy-saving control level, energy-saving control of the air-conditioning equipment is performed.

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