JP6905336B2 - Air conditioning system - Google Patents

Description

The present invention relates to an air conditioning system in general, and more particularly to an air conditioning system that collectively performs air conditioning in a plurality of air conditioning spaces in a building.

Conventionally, as an air conditioning system, a ventilation air conditioning system to which a ventilation air conditioning device that performs ventilation air conditioning in a plurality of zones (air conditioning spaces) of a residence (building) is applied has been proposed (Patent Document 1).

The above-mentioned ventilation and air conditioning system includes a plurality of controllers installed one by one in each of the plurality of zones. A plurality of controllers are connected to the control device of the ventilation air conditioner. The controller has a timer mode setting unit and a timer time setting unit. Here, the control device is configured so that the operation mode and the holding mode can be automatically switched by the controller.

In the operation mode, the control device controls the supply air volume of the air conditioning function unit with the set temperature as the target temperature. In the holding mode, the control device controls the air conditioning function unit with a value lower than the set temperature as the target temperature during the heating operation and a value higher than the set temperature as the target temperature during the cooling operation.

In the above-mentioned ventilation air conditioner, since the holding mode is shifted to the operation mode, the room temperature of each zone can be quickly reached to the set temperature as compared with the control method of operating from the stopped state to the operation mode.

Further, as an air conditioning system, an air conditioning ventilation system for the entire building is known (Patent Document 2).

In a house that adopts the air-conditioning / ventilation system in the entire building, when a consumer leaves the house for traveling, going out, etc., the entire air-conditioning / ventilation system in the entire building may be stopped. The whole building air conditioning ventilation system described in Patent Document 2 stopped the air conditioner when a stop command to stop the whole building air conditioning ventilation system was issued during the air conditioning ventilation operation in order to achieve both comfort and energy saving. After that, it is configured to delay and stop the sensible heat exchange air fan.

Japanese Unexamined Patent Publication No. 8-210690 Japanese Unexamined Patent Publication No. 11-294839

Not limited to the above-mentioned ventilation air-conditioning system and whole building air-conditioning ventilation system, reduction of energy consumption is desired in the field of air-conditioning system.

An object of the present invention is to provide an air conditioning system capable of reducing energy consumption.

One aspect of the air conditioning system according to the present invention includes a heat source device, a distribution device, a plurality of temperature sensors, and a control device. The heat source machine generates cold air or warm air as heat energy. The distribution device distributes the heat energy generated by the heat source machine to a plurality of air-conditioned spaces in the building. The plurality of temperature sensors measure the temperature of each of the plurality of air-conditioned spaces. The control device acquires the temperature measured by each of the plurality of temperature sensors as the current temperature of each of the plurality of air conditioning spaces, and reduces the difference between the current temperature and the target temperature of each of the plurality of air conditioning spaces. Controls the heat source machine and the distribution device. The control device has a normal mode and an outing mode as operation modes. In the normal mode, the control device acquires a user-desired temperature for each of the plurality of air-conditioned spaces and sets the target temperature. In the outing mode, the control device of each of the plurality of air conditioning spaces so as to make the air conditioning load of each of the plurality of air conditioning spaces relatively smaller than in the case of the normal mode when the outing mode is started. By changing the target temperature and approaching the scheduled return date and time in the adjustment period prior to the preset scheduled return date and time, the target temperature of each of the plurality of air conditioning spaces is set to a plurality of user-desired temperatures of the plurality of air conditioning spaces. Get closer in stages. In the outing mode, the control device has a longer maintenance time of the target temperature of the first stage among the plurality of stages than the maintenance time of the target temperature of the last stage . In the outing mode, when the time difference between the start date and time of the outing mode and the scheduled return date and time is larger than the length of the adjustment period, the control device determines the heat energy of the heat source machine until the adjustment period starts. Stop the generation.

The air conditioning system of the present invention can reduce energy consumption.

FIG. 1 is a schematic configuration diagram showing an overall configuration of an air conditioning system according to an embodiment of the present invention. FIG. 2 is a block diagram showing a control device in the same air conditioning system. FIG. 3A is a diagram showing an example of a screen of an operation display device when the operation mode of the control device is the normal mode in the same air conditioning system. FIG. 3B is a diagram showing an example of a screen of an operation display device when an outing mode is set as an operation mode of the control device in the same air conditioning system. FIG. 4 is a diagram showing an example of a screen of an operation display device when the outing mode is canceled as an operation mode of the control device in the same air conditioning system. FIG. 5 is a graph schematically showing the time change of the temperature of the air conditioning space when the operation mode of the control device is the outing mode in the same air conditioning system. FIG. 6 is a graph schematically showing the time change of the temperature of the air conditioning space when the operation mode of the control device is the outing mode in the air conditioning system of the comparative example.

The embodiments described below are merely one of various embodiments of the present invention. The following embodiments can be variously modified according to the design and the like as long as the object of the present invention can be achieved.

(Embodiment)
Hereinafter, the air conditioning system 10 of the present embodiment will be described with reference to FIGS. 1 to 5. The air conditioning system 10 is assumed to be installed in the building 20. In the embodiment described below, the building 20 is assumed to be a detached house, and the air conditioning system 10 is assumed to be a whole building air conditioning system. This whole building air conditioning system is configured to supply the heat energy (cold air or warm air) generated by the heat source unit 11 to almost the entire building 20. In addition, this whole building air conditioning system is configured to perform air conditioning and ventilation.

The air conditioning system 10 shown in FIG. 1 is installed in the building 20. The building 20 includes a plurality of (for example, nine) air-conditioned spaces 21 inside the building 20. The air-conditioned space 21 is a space that is the target of air-conditioning. The plurality of air-conditioned spaces 21 have a one-to-one correspondence with, for example, a plurality of sections 23 of the building 20. Section 23 is, for example, a room (living room, bedroom, etc.), kitchen, entrance, corridor, or the like.

The air conditioning system 10 includes a heat source machine 11, an air filter 12, a plurality of (for example, two) transfer fans 13, a plurality of (for example, 10) dampers 14, and a plurality of (for example, 10) outlets. 15 and. The heat source machine 11, the air filter 12, and the two transfer fans 13 are housed in a single housing 101 installed in the building 20 and are unitized.

Further, the air conditioning system 10 includes an air supply duct 16 that sends out air from the heat source machine 11, and an outside air duct 171 that introduces outside air (air) into the heat source machine 11. Further, the air conditioning system 10 includes a control device 30 and a plurality (for example, nine) temperature sensors 18.

The heat source unit 11 is a heat pump type air conditioner including one indoor unit 111 and one outdoor unit 112. In the air conditioning system 10, the air from the indoor unit 111 is supplied to the plurality of air conditioning spaces 21 through the air supply duct 16. Further, the air taken in by the indoor unit 111 is the outdoor air taken in from the underfloor 22 of the building 20 through the outside air duct 171 and the indoor air that reaches the suction port of the indoor unit 111 from each of the plurality of air-conditioned spaces 21 through the inside of the building 20. With the air. In FIG. 1, a broken line 172 schematically shows an air flow that reaches the suction port of the indoor unit 111 from each of the plurality of air-conditioned spaces 21 through a gap (for example, a slit in a room door). The outside air duct 171 is connected to a ventilation fan 19 that takes in air under the floor 22. The air conditioning system 10 includes a filter (hereinafter, referred to as “pre-filter”) arranged at at least one location in the path including the ventilation fan 19, the outside air duct 171 and the indoor unit 111. As a result, in the air conditioning system 10, relatively large dust, insects, etc. can be collected by the pre-filter, and it is possible to suppress the relatively large dust, insects, etc. from reaching the air filter 12. As a result, in the air conditioning system 10, clogging of the air filter 12 is suppressed.

The indoor unit 111 has a built-in filter. The filter of the indoor unit 111 is preferably configured to collect dust and the like relatively smaller than the pre-filter 17. By providing the pre-filter 17 in the air-conditioning system 10, it is possible to reduce the frequency of cleaning the filter of the indoor unit 111. The air from the indoor unit 111 is sent to the air supply duct 16 through the air filter 12. The air filter 12 has a filter performance capable of removing (collecting) particles having a relatively small particle size as compared with the filter of the indoor unit 111. The air filter 12 is preferably, for example, a HEPA filter (HEPA: High Efficiency Particulate Air). In the air conditioning system 10, if the air filter 12 is a HEPA filter, it is possible to collect fine particulate matter such as PM2.5. PM2.5 is a fine particle that permeates a sizing device having a particle size of 2.5 μm and a collection efficiency of 50%.

The heat source unit 11 performs a cooling operation in which cold air is sent out from the indoor unit 111 in the summer, and a heating operation in which the warm air is sent out from the indoor unit 111 in the winter. Switching between the cooling operation and the heating operation of the heat source machine 11 is performed in an intermediate period such as spring or autumn. The difference between the cooling operation and the heating operation is whether the set temperature of the heat source machine 11 is used as the upper limit value or the lower limit value. The heat source machine 11 operates so that the temperature of the cold air sent from the indoor unit 111 does not exceed the set temperature of the heat source machine 11 which is the upper limit value during the cooling operation, and the warm air sent from the indoor unit 111 during the heating operation. It operates so that the temperature of the heat source machine 11 does not fall below the set temperature of the heat source machine 11, which is the lower limit value. In the following description, the amount of heat during the heating operation means the amount of heat of the warm air, and the amount of heat during the cooling operation means the amount of heat of the cold air.

The damper 14 is, for example, a VAV unit (VAV: Variable Air Volume). In the air conditioning system 10, since the damper 14 and the air outlet 15 have a one-to-one correspondence, the number of the damper 14 and the number of the air outlet 15 are the same (for example, 10). The number of dampers 14 and the number of outlets 15 are appropriately determined according to the capacity of the heat source machine 11, the configuration and scale of the building 20, and the like.

The air conditioning system 10 includes the above-mentioned two transfer fans 13, an air supply duct 16, and 10 dampers 14 in order to distribute the heat energy generated by the heat source machine 11 to the 10 outlets 15. There is. In the air conditioning system 10, the two conveyor fans 13, the air supply duct 16, and the ten dampers 14 constitute a distribution device 102 that distributes the heat energy generated by the heat source machine 11 to the ten outlets 15. ing. In the air conditioning system 10, the ratio of the heat energy generated by the heat source machine 11 to the 10 outlets 15 depends on the air volume of each of the two transport fans 13 and the opening degree of each of the 10 dampers 14. It is decided. Here, in the air conditioning system 10, the control device 30 controls the distribution device 102. Thereby, in the air conditioning system 10, the ratio of distributing the heat energy generated by the heat source machine 11 to the 10 outlets 15 is determined.

In the air conditioning system 10, the air outlet 15 and the temperature sensor 18 are arranged in each of the plurality of air conditioning spaces 21. Here, in the air conditioning system 10, air is supplied from the air outlet 15 to each of the plurality of air conditioning spaces 21. Further, in the air conditioning system 10, one temperature sensor 18 is arranged in each of the plurality of air conditioning spaces 21. The air conditioning system 10 measures the temperature of each of the plurality of air conditioning spaces 21 by the temperature sensor 18. The amount of heat supplied to each of the plurality of air-conditioned spaces 21 per unit time is determined by the temperature and flow rate of the air supplied from the air outlet 15 to the air-conditioned space 21.

The position of the temperature sensor 18 is determined so that the air blown out from the air outlet 15 does not directly hit the temperature sensor 18. The position of the temperature sensor 18 is determined to be a wall surface surrounding the air-conditioned space 21 in the building 20, for example, at a height of 110 cm or more and 120 cm or less from the floor. The position of such a temperature sensor 18 can be changed as appropriate.

The control device 30 acquires the temperature measured by each of the nine temperature sensors 18 as the current temperature of each of the nine air conditioning spaces 21 so as to reduce the difference between the current temperature and the target temperature of each of the plurality of air conditioning spaces 21. In addition, the heat source machine 11 and the distribution device 102 are controlled. As a result, the control device 30 adjusts the amount of heat distributed to the 10 outlets 15 per unit time. It is desirable that the temperature sensor 18 is housed in a case having a vent so as to measure the temperature without being affected by radiant heat.

In the air conditioning system 10, the air supply duct 16 is branched into two branch ducts 161. As a result, in the air conditioning system 10, the air sent out from the indoor unit 111 and passed through the air filter 12 is introduced into each of the two branch ducts 161. In the air conditioning system 10, the transfer fan 13 is arranged on the upstream side of each of the two branch ducts 161. In FIG. 1, the broken line in the housing 101 schematically shows the air flow path. Each of the two transport fans 13 accelerates the air from the indoor unit 111. In the air conditioning system 10, each of the two branch ducts 161 is further branched into the terminal ducts 162 of a plurality of systems (5 systems). That is, the air from the indoor unit 111 is introduced into the terminal duct 162 of the 10 system. The number of terminal ducts 162 branching from each of the two branch ducts 161 is appropriately set in the range of 5 to 7, and may be different from each other.

In the air conditioning system 10, dampers 14 are arranged in each of the terminal ducts 162 of the 10 systems. In the air conditioning system 10, the control device 30 controls each of the dampers 14 to adjust the opening degree of each of the dampers 14. The damper 14 changes the flow rate of air passing through the terminal duct 162 by adjusting its opening degree. An outlet 15 is connected to the end of the end duct 162. Therefore, the air from the indoor unit 111 is sent to the damper 14 through the conveyor fan 13, the flow rate is adjusted by the damper 14, and then blown out to the air conditioning space 21 through the air outlet 15.

The air conditioning system 10 constantly ventilates the building 20. Therefore, the air conditioning system 10 always operates each transfer fan 13. However, in the air conditioning system 10, the transfer fan 13 may be stopped if necessary for maintenance or the like.

In the following, the control device 30 will be described in detail. As shown in FIG. 2, the control device 30 includes a processing unit 31 and a control unit 32. The processing unit 31 determines the amount of heat to be distributed to each of the plurality of air-conditioned spaces 21. The control unit 32 controls the heat source machine 11, each transfer fan 13, and each damper 14. Further, the control device 30 includes an interface unit 33 for inputting and outputting information to and from the operation display device 40.

The operation display device 40 includes a touch panel including a display device and a touch pad, and functions as a user interface (GUI: Graphic User Interface). That is, the control device 30 outputs information to the display device of the operation display device 40, and receives the information input from the touch pad of the operation display device 40. Various screens are displayed on the operation display device 40 as needed. The operation display device 40 may be a smartphone, a tablet computer, a personal computer, or the like, even if it is not dedicated. In the air conditioning system 10, the operation display device 40 constitutes an operation unit that can be operated by the user. Further, the air conditioning system 10 may separately include a display device and an operation device instead of the operation display device 40. In this case, the operating device constitutes an operating unit that can be operated by the user.

The air conditioning system 10 is configured so that a contractor or the like can associate the damper 14 and the temperature sensor 18 with each of the plurality of air conditioning spaces 21 by using the operation display device 40. In the air conditioning system 10, one temperature sensor 18 different from each other is associated with each of the plurality of air conditioning spaces 21. The number of dampers 14 associated with each of the plurality of air-conditioned spaces 21 is not limited to one, and may be plural. The number of dampers 14 associated with the air-conditioning space 21 is appropriately determined according to the air-conditioning load of the air-conditioning space 21 determined by the size of the compartment 23 and the like. For example, if the air-conditioned space 21 is a room with 8 tatami mats, the number of dampers 14 is one, and if the air-conditioned space 21 is a room with 16 tatami mats (for example, a living room), the number of dampers 14 is two. be.

In the air conditioning system 10, once the correspondence between one or a plurality of dampers 14 and the temperature sensor 18 is determined, the air outlet 15 and the temperature sensor 18 having a one-to-one correspondence with the damper 14 are linked. As a result, in the air conditioning system 10, the air conditioning space 21 for measuring the temperature by each of the plurality of temperature sensors 18 is specified.

In the air-conditioning system 10, a preset room name can be associated with each of the plurality of air-conditioning spaces 21 by an operation of the operation display device 40 by a user or the like. Further, in the air conditioning system 10, it is possible to instruct the user's desired temperature of each of the plurality of air conditioning spaces 21 by operating the operation display device 40 by a user or the like.

The control device 30 stores in the storage unit 34 the user-desired temperature instructed for each of the plurality of air-conditioned spaces 21 by the operation of the operation display device 40 by the user or the like.

The processing unit 31 of the control device 30 includes an acquisition unit 310 that acquires the current temperature measured by each of the plurality of temperature sensors 18 by communicating with each of the plurality of temperature sensors 18. The acquisition unit 310 is configured to perform wired communication with each of the plurality of temperature sensors 18 and periodically inquire of the plurality of temperature sensors 18 about the current temperature. That is, the acquisition unit 310 acquires the current temperature from each of the temperature sensors 18 by polling the plurality of temperature sensors 18. The cycle in which the acquisition unit 310 inquires of the current temperature from each of the plurality of temperature sensors 18 is defined in, for example, a range of 1 minute or more and 15 minutes or less, preferably 5 minutes or more and 10 minutes or less. This cycle may be appropriately determined depending on, for example, the speed at which the temperature of the air conditioning space 21 changes, the measurement accuracy of the temperature sensor 18, and the like.

The current temperature acquired by the acquisition unit 310 from the temperature sensor 18 is the temperature measured by the temperature sensor 18 (the air temperature of the air conditioning space 21) when the acquisition unit 310 inquires of the temperature sensor 18. However, the current temperature acquired by the acquisition unit 310 from the temperature sensor 18 may be the average value of the temperatures in a predetermined period set near the time when the temperature sensor 18 receives the inquiry from the acquisition unit 310. This predetermined period is either before or after the time when the temperature sensor 18 receives an inquiry from the acquisition unit 310, or straddles that time. This predetermined period is set, for example, in the range of 10 seconds or more and 3 minutes or less, preferably 30 seconds or more and 1 minute or less.

The processing unit 31 of the control device 30 includes a first calculation unit 311, a second calculation unit 312, and a determination unit 313 in addition to the acquisition unit 310. In the following, for convenience of explanation, a positive integer value i representing the order is associated with the time series of the current temperature acquired by the acquisition unit 310, and the identification information for distinguishing the plurality of air-conditioned spaces 21 from each other is represented by j. The identification information j is represented by, for example, a positive integer value.

The first calculation unit 311 inputs the user's desired temperature stored in the storage unit 34 and the current temperature acquired by the acquisition unit 310 for each of the plurality of air conditioning spaces 21, and the temperature difference between the current temperature and the target temperature. To calculate. Here, the first calculation unit 311 calculates the target temperature used for calculation, determination, etc. in the control device 30 from the user's desired temperature. The target temperature may be the same as or different from the user's desired temperature. The user's desired temperature is a temperature instructed for each of the plurality of air-conditioned spaces 21 by the operation of the operation display device 40 by the user or the like. The control device 30 has a normal mode and an outing mode as operation modes. In the normal mode, the user's desired temperature for each of the plurality of air-conditioned spaces 21 is acquired from the storage unit 34 and set as the target temperature. .. First, the operation when the operation mode of the control device 30 is the normal mode will be described, and then the operation when the operation mode is the outing mode will be described. When the current temperature acquired by the acquisition unit 310 is represented by θj1 (i) and the target temperature is represented by θj2 for the air-conditioned space 21 whose identification information is j, the first calculation unit 311 describes the temperature difference Δθj (i). It is calculated by Δθj (i) = θj1 (i) −θj2, and is output with positive and negative signs. The first calculation unit 311 obtains the temperature difference Δθj (i) for each of the plurality of air-conditioned spaces 21. The first calculation unit 311 temporarily stores the temperature difference Δθj (i) obtained by calculation in the storage unit 34 in association with the identification information j of the air conditioning space 21. The storage unit 34 stores at least two temperature differences Δθj (i) and Δθj (i-1) for each air-conditioned space 21. The two temperature differences Δθj (i) and Δθj (i-1) stored in the storage unit 34 are updated when the acquisition unit 310 acquires the current temperature θj1 (i). That is, the storage unit 34 stores the latest temperature difference Δθj (i) and the previous temperature difference Δθj (i-1). The latest temperature difference Δθj (i) is a temperature difference obtained in the period from the acquisition of the current temperature θj1 (i) by the acquisition unit 310 to the acquisition of the next current temperature θj1 (i + 1). Further, the previous temperature difference Δθj (i-1) is the period before the acquisition unit 310 acquires the current temperature θj1 (i) and after the acquisition of the previous previous current temperature θj1 (i-1). It is the temperature difference obtained in.

The second calculation unit 312 calculates the temperature change Vj (i) every time the acquisition unit 310 acquires the current temperature θj1 (i). The temperature change Vj (i) is the difference between the two current temperatures θj1 (i) and θj1 (i-1) acquired by the acquisition unit 310. That is, the second calculation unit 312 obtains the temperature change Vj (i) in a unit time by the calculation of Vj (i) = θj1 (i-1) −θj1 (i). The temperature change Vj (i) represents the temperature change with time. Since the first calculation unit 311 obtains the temperature difference Δθj (i), the second calculation unit 312 obtains the current temperatures θj1 (i) and θj1 (i-1) in order to obtain the temperature change Vj (i). Instead of the difference, the difference between the two temperature differences Δθj (i) and Δθj (i-1) may be obtained. If the target temperature θj2 does not change during the period in which the acquisition unit 310 acquires the current temperatures θj1 (i) and θj1 (i-1) for two times, the current temperatures θj1 (i) and θj1 (i-1) for two times are not changed. And the difference between the two temperature differences θj1 (i) and θj1 (i-1) are the same values.

The determination unit 313 is based on the i-th temperature difference Δθj (i) obtained by the first calculation unit 311 and the temperature change Vj (i) obtained by the second calculation unit 312 for each of the plurality of air conditioning spaces 21. Therefore, the distribution amount of the amount of heat supplied from the heat source unit 11 to each of the plurality of air-conditioned spaces 21 is determined. The amount of heat distributed is determined by the opening degree of each of the plurality of dampers 14, the air volume of each of the two transport fans 13, and the amount of heat generated by the heat source machine 11 per unit time. That is, the determination unit 313 determines the opening degree of each of the plurality of dampers 14 based on the temperature difference Δθj (i) and the temperature change Vj (i) of each of the plurality of air conditioning spaces 21, and then the two transfer fans 13 And the amount of heat generated by the heat source machine 11 per unit time are determined.

A specific operation example of the determination unit 313 will be described below. In the following, after explaining the function of determining the opening degree of the damper 14 for one air-conditioned space 21 with respect to the determination unit 313, the two transport fans 13 are based on the opening degree of all the dampers 14 arranged in the building 20. The function of determining the air volume and the amount of heat generated per unit time in the heat source machine 11 will be described.

The determination unit 313 includes a first control table as shown in Table 1 that associates the temperature difference of the air conditioning space 21 with the opening degree of the damper 14 during the cooling operation period of the air conditioning system 10. Table 1 shows a first control table during the period during which the air conditioning system 10 is in the cooling operation in the assumed standard heat load air conditioning space 21.

In the first control table, the temperature difference Δθj is divided into a plurality of sections, and the opening degree of the damper 14 corresponds to each of the plurality of sections.

In the cooling operation of the air conditioning system 10, the fact that the current temperature θj1 (i) of the air conditioning space 21 measured by the temperature sensor 18 exceeds the target temperature θj2 indicates that the cooling of the air conditioning space 21 is insufficient. ing. Further, the fact that the current temperature θj1 (i) of the air-conditioned space 21 matches the target temperature θj2 indicates the satisfaction of cooling with respect to the air-conditioned space 21. Further, the fact that the current temperature θj1 (i) of the air-conditioned space 21 is lower than the target temperature θj2 indicates that the cooling of the air-conditioned space 21 is excessive.

In the air conditioning system 10, when the cooling of the air conditioning space 21 is insufficient, the current temperature θj1 (i) exceeds the target temperature θj2, and the larger the difference between the current temperature θj1 (i) and the target temperature θj2, the more the cooling is insufficient. The degree is large.

The first calculation unit 311 obtains the temperature difference Δθj (i) obtained by subtracting the target temperature θj2 from the current temperature θj1 (i). In the air conditioning system 10, if the temperature difference Δθj (i) obtained by the first calculation unit 311 with respect to the air conditioning space 21 is positive, the air conditioning space 21 is insufficiently cooled. Further, in the air conditioning system 10, the larger the temperature difference Δθj (i) obtained by the first calculation unit 311 with respect to the air conditioning space 21, the greater the degree of insufficient cooling.

As an example, the first control table defines five sections different from each other with respect to the temperature difference Δθj (i). In the first control table, a relatively large opening degree as the opening degree of the damper 14 corresponds to a section in which the temperature difference Δθj (i) is positive and the temperature difference Δθj (i) is relatively large. The first control table is defined so that the opening degree of the damper 14 becomes the maximum value (for example, 100%) when the temperature difference Δθj (i) is 2 ° C. or higher.

In the first control table, even if the temperature difference Δθj (i) is negative, the amount of heat that does not raise the temperature of the air conditioning space 21 until the current temperature θj1 (i) drops by 1 ° C. from the target temperature θj2 is the air conditioning. The opening degree of the damper 14 is set to a predetermined value (for example, 25%) so as to be supplied to the space 21. Further, in the first control table, when the current temperature θj1 (i) drops by more than 1 ° C. with respect to the target temperature θj2, the opening degree of the damper 14 is set to be the minimum value (for example, 5%). Has been done. The minimum value of the opening degree of the damper 14 is not limited to 5%. For example, if there is a system that constantly ventilates in a system different from the air conditioning system 10, the minimum value of the opening degree of the damper 14 may be 0%.

By the way, the temperature difference Δθj (i) can be rephrased as “insufficiency”. The degree of deficiency added to Table 1 is represented by an integer value in five stages from “-1” to “3” corresponding to the temperature difference Δθj (i). In Table 1, when the degree of deficiency is 0, it indicates the satisfaction of air conditioning, when the degree of deficiency is positive, it indicates the deficiency of air conditioning, and when the degree of deficiency is negative, it indicates the excess of air conditioning. In Table 1, the shortage of air conditioning is represented by an integer value in three stages in terms of the degree of shortage, and the larger the value, the greater the degree of lack of air conditioning.

The determination unit 313 uses the second control table as shown in Table 2 during the period when the air conditioning system 10 is in the heating operation. Since the target temperature θj2 is the lower limit value during the heating operation, the second control table provides more sections where the temperature difference Δθj (i) is negative than the sections where the temperature difference Δθj (i) is positive. Further, the degree of deficiency is associated with the interval of the temperature difference so that the larger the absolute value is, the larger the temperature difference Δθj (i) is.

Each time the acquisition unit 310 acquires the current temperature θj1 (i), the determination unit 313 receives the temperature difference Δθj (i) from the first calculation unit 311 and secondly controls the section to which the temperature difference Δθj (i) belongs. Obtain from the table. The determination unit 313 determines the opening degree of the damper 14 according to the section to which the temperature difference Δθj (i) belongs. The degree of deficiency in Tables 1 and 2 is not essential.

In the air conditioning system 10, the determination unit 313 is configured to be able to sequentially update each of the first control table in Table 1 and the second control table in Table 2.

In each of Tables 1 and 2, the temperature difference Δθj (i) is a value obtained by subtracting the target temperature θj2 from the current temperature θj1 (i). Therefore, the positive and negative signs of the temperature difference Δθj (i) indicating the state in which the air conditioning is insufficient are reversed between the first control table shown in Table 1 and the second control table shown in Table 2. In the following description, a case where the air conditioning system 10 is in a cooling operation will be described as an example. Therefore, when the air conditioning system 10 is in the heating operation, it is necessary to reverse the positive and negative signs of the temperature difference Δθj (i).

In the air conditioning system 10, when the air conditioning load of the air conditioning space 21 is relatively large with respect to the air conditioning load of another air conditioning space 21 and the air conditioning is insufficient, the unit is supplied to the air conditioning space 21 having a relatively large air conditioning load. Increasing the amount of heat per hour shortens the time required for the current temperature θj1 (i) of the air-conditioned space 21 having a relatively large air-conditioning load to reach the target temperature θj2. Further, when the air conditioning load of the air conditioning space 21 is smaller than the air conditioning load of the other air conditioning space 21, the current temperature θj1 (i) may exceed the target temperature θj2 and the air conditioning may become excessive. Further, if the current temperature θj1 (i) reaches the target temperature θj2 and the amount of heat supplied to the air conditioning space 21 per unit time does not match the air conditioning load of the air conditioning space 21, the current air conditioning space 21 is present. The fluctuation of the temperature θj1 (i) may be large. On the other hand, in the air conditioning system 10, by reducing the amount of heat supplied to the air conditioning space 21 having a relatively small air conditioning load per unit time, the air conditioning of the air conditioning space 21 having a relatively small air conditioning load becomes excessive. It is possible to suppress fluctuations in the current temperature θj1 (i) when the current temperature θj1 (i) reaches the target temperature θj2.

In the air conditioning system 10, the determination unit 313 determines the opening degree of the damper 14 not only based on the temperature difference Δθj (i) but also on the temperature change Vj (i) with respect to time. Here, the determination unit 313 includes a correction unit 315 that sequentially updates the first control table and the second control table. When the air conditioning is insufficient and the temperature change Vj (i) with respect to time is relatively small, the correction unit 315 updates the opening degree of the damper 14 so that the temperature change Vj (i) with respect to time becomes relatively large. do. Further, when the air conditioning is sufficient or excessive and the temperature change Vj (i) with respect to time is relatively large, the correction unit 315 opens the damper 14 so that the temperature change Vj (i) becomes relatively small. To update. Here, the magnitude of the temperature change Vj (i) with respect to time represents the speed of the temperature change in the air-conditioned space 21. In other words, the temperature change Vj (i) with respect to time can be used as an index of the magnitude of the air conditioning load of the air conditioning space 21. In the air-conditioned space 21, the larger the temperature change Vj (i) with respect to time, the smaller the air-conditioning load, and the smaller the temperature change Vj (i) with respect to time, the larger the air-conditioning load. Here, the air conditioning load differs depending on the attributes of the air conditioning space 21 (insulation characteristics, volume, room orientation, etc.), target temperature, and the like. In the air-conditioned space 21, for example, the larger the volume of the air-conditioned space 21, the larger the air-conditioning load, and the smaller the volume of the air-conditioned space, the smaller the air-conditioning load. Further, in the air conditioning space 21, the lower the target temperature during the cooling operation of the air conditioning system 10, the larger the air conditioning load, and the higher the target temperature, the smaller the air conditioning load. Further, in the air conditioning space 21, the higher the target temperature during the heating operation of the air conditioning system 10, the larger the air conditioning load, and the lower the target temperature, the smaller the air conditioning load.

The conditions for updating the opening degree of the damper 14 in the first control table or the opening degree of the damper 14 in the second control table are the temperature difference Δθj (i) or Δθj (i-1) and the temperature change Vj with respect to time. It is defined in combination with (i). The determination unit 313 evaluates whether or not the air conditioning is insufficient by comparing the temperature difference Δθj (i) or Δθj (i-1) with the first threshold value. Further, the determination unit 313 evaluates the amount of heat supplied per unit time from the amount of temperature change per unit time of the air-conditioned space 21 by comparing the temperature change Vj (i) with respect to time with the second threshold value.

The determination unit 313 also defines a third threshold value to be compared with the temperature difference Δθj (i) and a fourth threshold value to be compared with the temperature change Vj (i). The third threshold is used to evaluate whether the air conditioning is sufficient or excessive by comparing with the temperature difference Δθj (i). Similar to the second threshold value, the fourth threshold value is used to evaluate the amount of heat supplied per unit time from the amount of temperature change per unit time of the air-conditioned space 21. However, the above-mentioned second threshold value is used to determine the amount of heat supplied per unit time from the amount of temperature change per unit time of the air-conditioned space 21 in which air conditioning is insufficient. On the other hand, the fourth threshold value is used to determine the amount of heat supplied per unit time from the amount of temperature change per unit time of the air-conditioned space 21 in which the air conditioning is excessive. Hereinafter, the first threshold value will be described as TH1, the second threshold value as TH2, the third threshold value as TH3, and the fourth threshold value as TH4.

When the conditions of Δθj (i)> TH1 or Δθj (i-1)> TH1 and Vj (i) <TH2 are satisfied, the correction unit 315 opens the damper 14 so that the temperature change Vj (i) increases. To correct. The condition here indicates that the air conditioning is insufficient because the temperature difference Δθj (i) is larger than the first threshold value TH1, and the air conditioning load in the air conditioning space 21 because the temperature change Vj (i) is smaller than the second threshold value TH2. Means that the amount of heat supplied per unit time is insufficient. That is, the air-conditioned space 21 in which this condition is satisfied is evaluated as having insufficient air-conditioning by comparing the temperature difference Δθj (i) with the first threshold value TH1, and the temperature change Vj (i) is smaller than the second threshold value TH2. It is evaluated as. Therefore, the correction unit 315 corrects and updates the first control table so as to increase the opening degree of the damper 14 corresponding to the air conditioning space 21. By making such a correction in the control device 30, the air conditioning system 10 sets the current temperature θj (i) of the air conditioning space 21 having a relatively large air conditioning load to the same time as the air conditioning space 21 having a relatively small air conditioning load. It is possible to approach the target temperature θj2.

Further, the correction unit 315 corrects the opening degree of the damper 14 in the first control table so that the temperature change Vj (i) decreases when the condition Δθj (i) <TH3 and Vj (i)> TH4 is satisfied. And update. The condition here indicates that the air conditioning is sufficient or excessive because the temperature difference Δθj (i) is smaller than the third threshold value TH3, and the temperature change Vj (i) is larger than the fourth threshold value TH4, so that the air conditioning space 21 This means that the air conditioning load is small and the amount of heat supplied per unit time is excessive. That is, in the air-conditioned space 21 in which this condition is satisfied, the air-conditioning is evaluated to be sufficient or excessive by comparing the temperature difference Δθj (i) with the third threshold value TH3, and the temperature change Vj (i) is the fourth threshold value TH4. It is rated larger. Therefore, the correction unit 315 corrects and updates the first control table so as to reduce the opening degree of the damper 14 corresponding to the air conditioning space 21. By making such a correction in the control device 30, the air conditioning system 10 can suppress excessive air conditioning in the air conditioning space 21 having a relatively small air conditioning load.

Since the first threshold value TH1 is used to evaluate the lack of air conditioning, it is a relatively large value and is set to, for example, 1 ° C. As described above, the second threshold value TH2 is used to evaluate the amount of heat supplied per unit time from the amount of temperature change per unit time of the air conditioning space 21. The second threshold TH2 is selected from, for example, a range of 0 ° C. or higher and 1 ° C. or lower, preferably selected from a range of 0.2 ° C. or higher and 0.5 ° C. or lower, and is set to 0.3 ° C. as an example. On the other hand, the third threshold value TH3 is a relatively small value because it is used to evaluate whether the air conditioning is sufficient or excessive, and is set to, for example, 0.5 ° C. Since the fourth threshold value TH4 is used to evaluate that the amount of heat supplied per unit time is large, for example, from the range of 0 ° C. or higher and 1.0 ° C. or lower, preferably 0.3 ° C. or higher and 0.7 ° C. or lower. It is selected and set to 0.5 ° C. as an example.

The method of correcting the first control table will be specifically described below. When the correction unit 315 corrects the opening degree of the damper 14 in the first control table so as to be relatively large, the correction unit 315 displays the first control table (for example, the first control table shown in Table 1) before the correction. Update to the first control table corrected as in 3.

Here, since it is assumed that the air conditioning system 10 is in the cooling operation, the first control table shown in Table 3 is created by correcting the first control table shown in Table 1. That is, when the temperature difference Δθj (i) is 1 ° C. or more and less than 2 ° C., the opening degree of the damper 14 is changed from 70% to 100%, and when the temperature difference Δθj (i) is 0 ° C. or more and less than 1 ° C., the damper The opening degree of 14 is changed from 40% to 70%. Further, in the first control table of Table 3, when the temperature difference Δθj (i) is -1 ° C. or more and less than 0 ° C., the opening degree of the damper 14 is 25% to 40% with respect to the first control table of Table 1. Has been changed to.

When the temperature difference Δθj (i) is 2 ° C. or higher, the opening degree of the damper 14 is maintained at 100% even in the first control table of Table 3. Further, when the temperature difference Δθj (i) is less than -1 ° C., the opening degree of the damper 14 is maintained at 5% even in the first control table of Table 3. However, if the building 20 has a system of constant ventilation separate from the air conditioning system 10, the opening degree of the damper 14 may be 0% when the temperature difference Δθj (i) is less than -1 ° C.

On the other hand, when the correction unit 315 corrects the opening degree of the damper 14 in the first control table so as to be relatively small, the correction unit 315 uses the first control table before the correction (for example, the first control table shown in Table 1). , Update to the corrected first control table as shown in Table 4.

The first control table shown in Table 4 is corrected so that the opening degree of the damper 14 is relatively smaller than that of the first control table shown in Table 1. That is, when the temperature difference Δθj (i) is 1 ° C. or more and less than 2 ° C., the opening degree of the damper 14 is changed from 70% to 40%, and when the temperature difference Δθj (i) is 0 ° C. or more and less than 1 ° C., the damper The opening degree of 14 is changed from 40% to 25%. Further, in the first control table of Table 4, when the temperature difference Δθj (i) is -1 ° C. or more and less than 0 ° C., the opening degree of the damper 14 is 25% to 5% with respect to the first control table of Table 1. Has been changed to.

Here, when the temperature difference Δθj (i) is less than -1 ° C., the opening degree of the damper 14 is set to 5% as in the first control table shown in Table 3 in order to constantly ventilate the air conditioning system 10. Be maintained. However, if the building 20 has a constant ventilation system separate from the air conditioning system 10, the opening degree of the damper 14 may be set to 0%. Further, when the temperature difference Δθj (i) is 2 ° C. or higher, the opening degree of the damper 14 is maintained at 100%.

Tables 3 and 4 show the first control table after correction when the air conditioning system 10 is in the cooling operation, but when the air conditioning system 10 is in the heating operation, the correction unit 315 is shown in Table 2. Correct the second control table. The opening degree of the damper 14 is corrected in the same way as in Tables 3 and 4 with respect to Table 1. Further, the air conditioning system 10 described above uses the first control table in which the temperature difference Δθj (i) is associated with the opening degree of the damper 14, but if the degree of deficiency is used instead of the temperature difference Δθj (i). , Table 3 and Table 4 can also be used when the air conditioning system 10 is in the heating operation.

In the above example, the positive and negative signs of the temperature difference Δθj (i) are reversed depending on whether the air conditioning system 10 is in the cooling operation or the heating operation. On the other hand, when the first calculation unit 311 replaces the two terms of the current temperature θj (i) and the target temperature θj2 when obtaining the temperature difference Δθj (i) according to the cooling operation or the heating operation, the cooling Regardless of the operation or the heating operation, it is possible to match the positive and negative signs of the temperature difference Δθj (i) with respect to the degree of insufficient air conditioning. That is, the first calculation unit 311 adopts the value obtained by subtracting the target temperature θj2 from the current temperature θj (i) during the cooling operation of the air conditioning system 10 as the temperature difference Δθj (i), and during the heating operation. The value obtained by subtracting the current temperature θj (i) from the target temperature θj2 may be adopted as the temperature difference Δθj (i). In this case, the determination unit 313 does not need to use different control tables for the cooling operation and the heating operation, and can share the first control table in Table 1 for both the cooling operation and the heating operation.

By the way, in the air conditioning system 10, the amount of heat supplied to each of the plurality of air conditioning spaces 21 per unit time is the amount of heat generated by the heat source machine 11 per unit time, the air volume of each of the two transport fans 13, and 10 pieces. It is determined by the opening degree of each of the dampers 14. Further, when the air volume of each of the two transport fans 13 and the opening degree of each of the ten dampers 14 are determined, the volume of air supplied to each of the nine air-conditioned spaces 21 per unit time is determined. That is, the heat energy generated by the heat source machine 11 per unit time depends on the ratio of the volume of air supplied to each of the nine air-conditioned spaces 21 per unit time under ideal conditions where there is no heat loss. It is distributed to nine air-conditioned spaces 21. The amount of heat energy generated by the heat source machine 11 per unit time is equal to the sum of the heat energy supplied to each of all the air-conditioned spaces 21 in the building 20 under ideal conditions where there is no heat loss.

In the above example, when the acquisition unit 310 acquires the current temperature of each of the plurality of air-conditioning spaces 21, the determination unit 313 obtains the opening degree of the damper 14 corresponding to each of the plurality of air-conditioning spaces 21. The determination unit 313 determines the air volume of each of the two transport fans 13 after determining the opening degree of the damper 14 in order to determine the amount of heat to be distributed to each of the plurality of air conditioning spaces 21 per unit time. The air volume of the transfer fan 13 is determined by selecting the output condition of the transfer fan 13 from a plurality of notches (for example, first notch, second notch, third notch, fourth notch) for output adjustment (for air volume adjustment). You can decide. The air volume of the transport fan 13 increases in the order of the first notch (fine), the second notch (weak), the third notch (medium), and the fourth notch (strong). In the air conditioning system 10, the determination unit 313 determines the air volume of the transfer fan 13 by selecting the operating conditions of the transfer fan 13 from the notches in a plurality of stages. In the air conditioning system 10, one conveyor fan 13 is associated with five dampers 14, so that the determination unit 313 adjusts the air volume of the conveyor fan 13 to a plurality (for example, five) on the downstream side of the conveyor fan 13. ) Is determined based on the opening degree of the damper 14.

In order to determine the air volume of the conveyor fan 13 based on the opening degree of the damper 14, the determination unit 313 has a score table as shown in Table 5 in which the score is associated with the opening degree of the damper 14, and the notch of the conveyor fan 13 is associated with the score. It is provided with a determination table as shown in Table 6 in which the above are associated with each other.

The determination unit 313 obtains the score corresponding to the opening degree of each of the 10 dampers 14 by referring to the score table as shown in Table 5, and refers to the determination table as shown in Table 6 to obtain the scores of the two dampers. The air volume of each of the transport fans 13 is determined. Specifically, the determination unit 313 determines the air volume of the transfer fan 13 by selecting the notch of the transfer fan 13 based on the scores of the five dampers 14 corresponding to one transfer fan 13.

The score in the determination table shown in Table 6 is not the total score of the scores of the five dampers 14 corresponding to one conveyor fan 13, but the average score. Therefore, the determination unit 313 can determine the air volume of the transfer fan 13 by using the determination table shown in Table 6 regardless of the number of dampers 14 corresponding to the transfer fan 13.

The determination unit 313 determines the air volume of the two conveyor fans 13 based on the opening degree of the ten dampers 14, and then determines the amount of heat supplied from the heat source machine 11 to the distribution device 102 per unit time. Here, the amount of heat supplied from the heat source machine 11 to the distribution device 102 per unit time can be determined by a combination of the air volume of the heat source machine 11 and the set temperature of the heat source machine 11.

The set temperature of the heat source machine 11 is a constant temperature in each of the cooling operation and the heating operation. Therefore, in the air conditioning system 10, the amount of heat supplied from the heat source unit 11 to the distribution device 102 per unit time is adjusted by the air volume. The air volume of the heat source machine 11 is determined according to the total of the air volumes of the two transport fans 13. The air volume of the heat source machine 11 can be adjusted in five steps, for example. However, the air conditioning system 10 is designed so that the air volume of the heat source unit 11 is smaller than the total air volume of the two transport fans 13.

As described above, the control device 30 acquires the temperature measured by each of the plurality of temperature sensors 18 as the current temperature of each of the plurality of air conditioning spaces 21, and obtains the difference between the current temperature and the target temperature of each of the plurality of air conditioning spaces 21. The heat source machine 11 and the distribution device 102 are controlled so as to be small.

Here, as described above, the control device 30 has a normal mode and an outing mode as operation modes.

In the normal mode, the control device 30 acquires the user-desired temperature for each of the plurality of air-conditioned spaces 21 and sets it as the target temperature.

FIG. 3A is an example of the screen P1 of the operation display device 40 when the operation mode of the control device 30 is the normal mode. This screen P1 has a plurality of buttons B1 to B6. Button B1 is a button operated by the user, for example, when the user or the like selects to automatically switch between the cooling operation and the heating operation of the air conditioning system 10 in the air conditioning system 10. Button B2 is a button operated by the user when the user or the like selects to manually switch between the cooling operation and the heating operation of the air conditioning system 10. Button B3 is a button operated by a user or the like when the air conditioning system 10 is stopped. The button B4 is a button operated by a user or the like when the screen P1 is changed to the screen P2 for setting the information (information indicating the scheduled return date and time) required for the outing mode as shown in FIG. 3B. The button B5 is a button operated by a user or the like when the user's desired temperature common to the plurality of air-conditioned spaces 21 is set higher than the temperature displayed on the left side thereof (26 ° C. in the illustrated example). The button B6 is a button operated by a user or the like when the user's desired temperature common to the plurality of air-conditioned spaces 21 is made lower than the temperature displayed on the left side thereof (26 ° C. in the illustrated example).

The screen P2 is configured so that information necessary for the outing mode (information indicating the scheduled return date and time) can be input as the return time. Further, the screen P2 has a button B11 for the user to instruct the control device 30 to start the outing mode.

FIG. 4 is an example of the screen P3 of the operation display device 40 when the operation mode of the control device 30 is the outing mode. On the screen P3, a message indicating that the operation mode of the control device 30 is the outing mode is displayed. Further, the screen P3 has a button B21 for the user to instruct the control device 30 to cancel the outing mode.

When the control device 30 receives the information indicating the scheduled return date and time and the instruction to start the outing mode, the control device 30 changes the operation mode from the normal mode to the outing mode. However, if the time from the current date and time to the scheduled return date and time is set to be less than a predetermined time (for example, 6 hours), the control device 30 does not change the operation mode to the outing mode and is in the normal mode. Leave as. The specified time is specified based on, for example, the minimum time (for example, 4 hours) in which the effect of energy saving by changing the operation mode of the control device 30 from the normal mode to the outing mode can be expected. Not limited to. For example, the specified time is the minimum required for the temperature of the air conditioning space 21 to return to the user's desired temperature when the target temperature is set to the user's desired temperature after changing the operation mode of the control device 30 from the normal mode to the outing mode. It is regulated based on the time of.

Further, when the control device 30 receives the instruction to cancel the outing mode, the control device 30 changes the target temperature of each of the plurality of air conditioning spaces 21 to the user's desired temperature.

In the outing mode, the control device 30 sets the target temperature of each of the plurality of air conditioning spaces 21 so that the air conditioning load of each of the plurality of air conditioning spaces 21 is relatively smaller than in the case of the normal mode when the outing mode is started. By changing the air conditioning system 10, the entire air conditioning system 10 is shifted to energy-saving operation. For example, when the outing mode is started when the air conditioning system 10 is in the heating operation, the control device 30 stops the heat source machine 11 or blows air to the heat source machine 11 if the time until the scheduled return date and time is 24 hours or more. By controlling the heat source unit 11 so as to perform the above, the entire air conditioning system 10 is shifted to the energy saving operation. Stopping the heat source machine 11 means stopping the generation of heat energy in the heat source machine 11. The control device 30 is not limited to an example in which the heat source machine 11 is controlled so as to stop the heat source machine 11 or blow air to the heat source machine 11, and for example, the control device 30 operates the heat source machine 11 with the target temperature as the user's desired temperature -4 ° C. The air conditioning system 10 may be shifted to the energy saving operation by the operation. Further, when the outing mode is started when the air conditioning system 10 is in the cooling operation, the control device 30 stops the heat source machine 11 or blows air to the heat source machine 11 if the time until the scheduled return date and time is 24 hours or more. By controlling the heat source unit 11 so as to perform the above, the entire air conditioning system 10 is shifted to the energy saving operation. Here, the control device 30 is not limited to an example in which the heat source machine 11 is controlled so as to stop the heat source machine 11 or blow air to the heat source machine 11, and for example, the heat source machine 11 is set to a target temperature of + 3 ° C. The air conditioning system 10 may be shifted to the energy saving operation by operating the above.

After shifting the entire air conditioning system 10 to energy-saving operation, the control device 30 has a plurality of control devices 30 as they approach the scheduled return date and time in an adjustment period (for example, 24 hours before to the scheduled return date and time) before the preset scheduled return date and time. The target temperature of each of the air-conditioning spaces 21 is brought closer to the user's desired temperature (for example, 26 ° C.) of each of the plurality of air-conditioning spaces 21 in a plurality of steps. The adjustment period is a period longer than the above-mentioned specified time. When the outing mode is started during the heating operation, the control device 30 maintains the target temperature at the user's desired temperature of -2 ° C. from 24 hours before the scheduled return date to 2 hours before the scheduled return date. The target temperature is maintained at the user's desired temperature from 2 hours before the scheduled return date to the scheduled return date. When the outing mode is started during the cooling operation, the control device 30 maintains the target temperature at the user's desired temperature from 24 hours before the scheduled return date to 2 hours before the scheduled return date and time, and the scheduled return date and time. The target temperature is maintained at the user's desired temperature from 2 hours before the scheduled return to the scheduled date and time of returning home. The target temperature is a temperature set according to the user's desired temperature and the operation mode, and may be the same as or different from the user's desired temperature. The user-desired temperature is a temperature instructed for each of the plurality of air-conditioned spaces 21 by the operation of the operation display device 40 by the user or the like, and is the temperature desired by the user with respect to the air-conditioned space 21.

Table 7 below shows the relationship between the time from the current date and time to the scheduled return date and time in the outing mode described above and the target temperature of the air-conditioned space 21.

In the air conditioning system 10, for example, when the outing mode is started during the heating operation, the adjustment period is T0, the user's desired temperature is t0, and the target temperature of the first stage (initial target temperature) among the target temperatures of a plurality of stages. Te1, the final target temperature (final target temperature) is te2 (> te1), the maintenance time of the target temperature te1 is T1 (for example, 22 hours), and the maintenance time of the target temperature te2 (for example, 2 hours) is T2. Then, the temperature of the air-conditioned space 21 changes, for example, as shown by the solid line in FIG. Here, the target temperature in a plurality of stages means that the absolute value of the difference between the target temperature and the constant target temperature is gradually reduced, and the absolute value of the difference between the final target temperature and the user's desired temperature is reduced. Is less than the absolute value of the difference between the initial target temperature and the user's desired temperature. In the outing mode, the control device 30 has a maintenance time T1 of the target temperature te1 of the first stage longer than the maintenance time T2 of the target temperature te2 of the last stage among the target temperatures of the plurality of stages.

The air conditioning system of the comparative example has the same basic configuration as the air conditioning system 10, except that the target temperature is directly changed from the heating stop instruction temperature to the user's desired temperature when the control device 30 is in the outing mode. In the air conditioning system of the comparative example, for example, when the outing mode is started during the heating operation, the adjustment period is T10, the user's desired temperature is t0, and the temperature of the air conditioning space 21 reaches the user's desired temperature in the adjustment period. Assuming that the time is T11 (for example, 8 hours) and the time for maintaining the temperature of the air conditioning space 21 at the user's desired temperature during the adjustment period is T12 (for example, 16 hours), the temperature of the air conditioning space 21 is, for example, a solid line in FIG. It changes as shown by. In the air-conditioning system of the comparative example, if there is no outside temperature sensor that measures the temperature of the outside air of the building 20, the worst case is assumed in order to bring the temperature of the air-conditioning space 21 to the user's desired temperature t0 by the scheduled return date and time. Therefore, it is necessary to set a relatively long time from the resumption date and time of cooling or heating of the heat source unit 11 to the scheduled date and time of returning home, and in some cases, the wasted air conditioning time becomes long.

In the air conditioning system 10 of the present embodiment, since the target temperature of the air conditioning space 21 is changed stepwise in the adjustment period T0, the energy consumption corresponding to the portion indicated by the dots in FIG. 5 is consumed as compared with the air conditioning system of the comparative example. It can be seen that it can be reduced.

Even if the operation mode is the outing mode, the control device 30 is instructed to cancel the outing mode by the operation of the user's operation display device 40, for example, when the user returns home earlier than the scheduled return date and time. Change the operation mode from outing mode to normal mode.

The control device 30 described above is realized, for example, with a device including a processor that executes a program as a main hardware configuration. The device including the processor may be an MPU (Micro Processing Unit) provided with a semiconductor memory separately, or a microcontroller (Micro-Controller) housed in a single package together with the semiconductor memory. It is desirable that the control device 30 includes at least a RAM (Random Access Memory) as a memory, and at least one of a ROM (Read-Only Memory) and an EEPROM (Electrically Erasable Programmable Read-Only Memory).

The program is provided as written in ROM, or may be a recording medium such as an optical recording disk or a recording medium including a flash memory, which may be provided by a computer-readable recording medium. The program may also be provided through a telecommunication line such as the Internet or a mobile communication network. The program provided by the recording medium or telecommunication line is preferably stored in a rewritable non-volatile memory (eg EEPROM).

The building 20 is not limited to a detached house, but may be another building such as an apartment house or a store. Although the configuration including the heat pump type heat source machine 11 is exemplified as the air conditioning system 10, the air conditioning system 10 may have a configuration in which hot water or cold water is passed through a plurality of fan coil units. Further, when only heating is performed, the air conditioning system 10 may be configured to pass steam or hot water through a radiator. Further, in the above-mentioned air conditioning system 10, a HEPA filter is adopted as the air filter 12, but the HEPA filter is not limited to the HEPA filter, and for example, a ULPA filter (ULPA: Ultra Low Penetration Air) or the like may be used. The number of conveyor fans 13, the number of dampers 14 and outlets 15, the number of temperature sensors 18 and the like described above are examples and may be changed as appropriate.

In the air conditioning system 10 described above, the acquisition unit 310 performs wired communication with the temperature sensor 18, but the present invention is not limited to this, and for example, wireless communication may be performed. There are no particular restrictions on the communication rules between the acquisition unit 310 and the temperature sensor 18. Further, in the air conditioning system 10 described above, the acquisition unit 310 inquires of the current temperature to each of the plurality of temperature sensors 18, but the plurality of temperature sensors 18 may transmit the current temperature to the acquisition unit 310 at an appropriate timing. good.

Further, the above-mentioned information indicating the scheduled return date and time is not limited to the scheduled return date and time, and may be, for example, the time until the scheduled return date and time.

Further, in the case of the outing mode, the control device 30 brings the target temperature of each of the plurality of air-conditioning spaces 21 closer to the user's desired temperature of each of the plurality of air-conditioning spaces 21 in two steps as the scheduled return date and time approaches in the adjustment period. However, it may be a plurality of stages, for example, three stages.

Further, the control device 30 has a table that defines the relationship between the above-mentioned adjustment period T0, the maintenance time T1 of the target temperature te1, the maintenance time T2 of the target temperature te2, and the area where the building 20 is built. Alternatively, the adjustment period T0 and the maintenance times T1 and T2 may be changed with reference to this table. For example, in the control device 30, when the area where the building 20 is built is a cold region such as the Tohoku region, the adjustment period T0 is 24 hours, the maintenance time T1 is 22 hours, and the maintenance time T2 is 2 hours. On the other hand, when the area where the building 20 is built is a standard area such as the Kansai region, the control device 30 sets the adjustment period T0 to 12 hours, the maintenance time T1 to 10 hours, and the maintenance time T2. 2 hours. In addition to changing the adjustment period T0 and the maintenance times T1 and T2 for each area where the building is built, the control device 30 changes the target temperatures (target temperatures te1 and te2) in Table 7 for each area. May be good.

As is clear from the above-described embodiment, the air conditioning system 10 according to the first aspect includes a heat source machine 11, a distribution device 102, a plurality of temperature sensors, and a control device 30. The heat source machine 11 generates cold air or warm air as heat energy. The distribution device 102 distributes the heat energy generated by the heat source unit 11 to a plurality of air-conditioned spaces 21 in the building 20. The plurality of temperature sensors 18 measure the temperature of each of the plurality of air-conditioned spaces 21. The control device 30 acquires the temperature measured by each of the plurality of temperature sensors 18 as the current temperature of each of the plurality of air-conditioned spaces 21 so as to reduce the difference between the current temperature and the target temperature of each of the plurality of air-conditioned spaces 21. It controls the heat source machine 11 and the distribution device 102. The control device 30 has a normal mode and an outing mode as operation modes. In the normal mode, the control device 30 acquires the user-desired temperature for each of the plurality of air-conditioned spaces 21 and sets it as the target temperature. In the outing mode, the control device 30 sets the target temperature of each of the plurality of air conditioning spaces 21 so that the air conditioning load of each of the plurality of air conditioning spaces 21 is relatively smaller than in the case of the normal mode when the outing mode is started. The target temperature of each of the plurality of air-conditioning spaces 21 is brought closer to the user's desired temperature of each of the plurality of air-conditioning spaces 21 in a plurality of steps as the target temperature of each of the plurality of air-conditioning spaces 21 approaches the scheduled return date and time in the adjustment period before the scheduled return date and time.

According to the above configuration, the air conditioning system 10 can reduce energy consumption. The air conditioning system 10 is particularly useful when used as a whole building air conditioning system. This is because, in the whole building air conditioning system, the start-up time of the air conditioning space 21 to the user's desired temperature becomes relatively long after the air conditioning of the entire building 20 is stopped and the heat storage on the walls of the building 20 is reduced. .. Further, since the air conditioning system 10 does not need to use an outside air temperature sensor that measures the temperature of the outside air of the building 20, it is possible to suppress the control of the heat source machine 11 and the distribution device 102 by the control device 30 from becoming complicated. It becomes.

In the air conditioning system according to the second aspect, in the first aspect, in the outing mode, the control device 30 maintains the target temperature of the first stage among the plurality of stages longer than the maintenance time of the target temperature of the last stage. long. As a result, the air conditioning system 10 can further reduce the energy consumption.

In the air conditioning system 10 according to the third aspect, in the first or second aspect, in the outing mode, when the time difference between the start date and time of the outing mode and the scheduled return date and time is larger than the length of the adjustment period. , The generation of heat energy in the heat source machine 11 is stopped until the adjustment period starts. As a result, the air conditioning system 10 can further reduce the energy consumption.

The air conditioning system 10 according to the fourth aspect has an operation unit (operation display device 40) that can be operated by the user in any one of the first to third aspects. The air-conditioning system 10 can input information indicating the scheduled return date and time, instruct the start of the outing mode, and instruct the control device 30 to cancel the outing mode by operating the operation unit by the user. When the control device 30 receives the input of the information indicating the scheduled return date and the instruction to start the outing mode, the operation mode is changed from the normal mode to the outing mode, and when the instruction to cancel the outing mode is received, the control device 30 receives a plurality of air-conditioned spaces. 21 Change each target temperature to the user's desired temperature. As a result, the air conditioning system 10 can improve the usability of the user while reducing the energy consumption.

In the air conditioning system 10 according to the fifth aspect, in any one of the first to fourth aspects, the distribution device 102 distributes the cold air or the warm air from the heat source unit 11 to each of the plurality of air conditioning spaces 21. The terminal duct 162 branched into a plurality of systems, the plurality of dampers 14 for adjusting the flow rate of the air blown from each of the terminal ducts 162 of the plurality of systems to the plurality of air conditioning spaces 21, and the plurality of dampers 14 for the air from the heat source machine 11. A transport fan 13 for sending to each of the above is provided. As a result, the air conditioning system 10 accelerates the cold air or warm air from the heat source machine 11 by the transfer fan 13, so that the amount of heat can be adjusted even in the air conditioning space 21 away from the heat source machine 11. Further, in the air conditioning system 10, since the amount of heat supplied to the air conditioning space 21 per unit time is adjusted by the transfer fan 13 and the damper 14, the accuracy of the amount of heat supplied per unit time is improved for each air conditioning space 21. Is possible.

10 Air conditioning system 11 Heat source machine 13 Conveying fan 14 Damper 16 Air supply duct 18 Temperature sensor 20 Building 21 Air conditioning space 30 Control device 40 Operation display device (operation unit)
102 Distributor 162 End duct

Claims (3)

A heat source machine that generates cold or warm air as heat energy,
A distribution device that distributes the heat energy generated by the heat source machine to a plurality of air-conditioned spaces in the building.
A plurality of temperature sensors that measure the temperature of each of the plurality of air-conditioned spaces, and
The heat source machine and the heat source machine and the heat source machine so as to acquire the temperature measured by each of the plurality of temperature sensors as the current temperature of each of the plurality of air conditioning spaces and reduce the difference between the current temperature and the target temperature of each of the plurality of air conditioning spaces. A control device for controlling the distribution device is provided.
The control device has a normal mode and an outing mode as operation modes.
The control device is
In the normal mode, the user's desired temperature for each of the plurality of air-conditioned spaces is acquired and set as the target temperature.
In the outing mode, when the outing mode is started, the target temperature of each of the plurality of air conditioning spaces is changed so that the air conditioning load of each of the plurality of air conditioning spaces is relatively smaller than in the case of the normal mode. In the adjustment period before the scheduled return date and time set in advance, the target temperature of each of the plurality of air-conditioning spaces is brought closer to the user's desired temperature of each of the plurality of air-conditioning spaces in a plurality of steps as the scheduled return date and time approaches.
The control device, and in the going out mode, the sustain time of the first stage of the target temperature of the plurality of stages is rather long than maintaining time of the target temperature of the last stage,
In the outing mode, when the time difference between the start date and time of the outing mode and the scheduled return date and time is larger than the length of the adjustment period, the control device determines the heat energy of the heat source machine until the adjustment period starts. An air conditioning system characterized by stopping production. It has an operation unit that can be operated by the user.
By operating the operation unit by the user, it is possible to input information indicating the scheduled return date and time, instruct the start of the outing mode, and instruct the control device to cancel the outing mode.
The control device is
Upon receiving the information indicating the scheduled return date and time and the instruction to start the outing mode, the operation mode is changed from the normal mode to the outing mode.
Upon receiving the instruction to cancel the outing mode, the target temperature of each of the plurality of air-conditioned spaces is changed to the user's desired temperature.
The air conditioning system according to claim 1. The distribution device is
A terminal duct branched into a plurality of systems so as to distribute the cold air or the warm air from the heat source machine to each of the plurality of air conditioning spaces, and
A plurality of dampers for adjusting the flow rate of air blown from each of the plurality of terminal ducts to the plurality of air-conditioned spaces, and a plurality of dampers.
A transport fan that sends air from the heat source machine to each of the plurality of dampers is provided.
The air conditioning system according to claim 1 or 2.

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