JP6842808B2 - Air conditioning system and control device - Google Patents

Description

The present invention generally relates to an air conditioning system and a control device, and more particularly to an air conditioning system that collectively performs air conditioning of a plurality of air conditioning spaces in a building and a control device used therein.

Conventionally, an air conditioner that automatically cleans an air filter and an indoor heat exchanger has been proposed (see, for example, Patent Document 1). In Patent Document 1, when the set time comes during the operation of the air conditioner, the operation is stopped, the filter is cleaned, and then the heat exchanger is cleaned. When the filter cleaning and heat exchanger cleaning are completed, the operation state before the set time is restored.

Japanese Unexamined Patent Publication No. 2009-58143

In Patent Document 1, since the automatic cleaning (cleaning function) of the indoor heat exchanger and the automatic cleaning (cleaning function) of the air filter are continuously performed, the interruption period of the air conditioning operation of the air conditioner (heat source machine) becomes long. There was a risk that the temperature change in the air-conditioned space would increase.

The present invention has been made in view of the above reasons, and an object of the present invention is to provide an air conditioning system and a control device capable of suppressing a temperature change in an air conditioning space due to a cleaning function of a heat source machine.

The air conditioning system according to one aspect of the present invention includes a heat source machine, a distribution device, 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 control device controls the heat source machine and the distribution device. The heat source machine has a cleaning function of interrupting an air conditioning operation for supplying the heat energy to the plurality of air conditioning spaces to clean the heat source machine. The control device includes a cleaning control unit and a time setting unit. The cleaning control unit instructs the heat source machine to execute the cleaning function. The time setting unit is based on the first cleaning time in which the first cleaning function is executed out of the two cleaning functions when the cleaning control unit executes the cleaning function twice within a predetermined period. Set the second cleaning time when the second cleaning function is executed. Further, the time setting unit sets the second cleaning time so that the time difference between the end time of the first cleaning function and the start time of the second cleaning function is equal to or more than a predetermined time. The predetermined period is 24 hours. The time setting unit has a night time zone including midnight and a daytime zone including daytime as candidates for the time zone of the second cleaning time, and the second cleaning time can be set to the night time zone. If, the second cleaning time is set to the night time zone, and if the second cleaning time cannot be set to the night time zone, the second cleaning time is set to the daytime zone. To do.

The control device according to one aspect of the present invention is used in the above air conditioning system.

In the air conditioning system and the control device of the present invention, it is possible to suppress the temperature change of the air conditioning space due to the cleaning function of the heat source machine.

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 and a heat source unit in the same air conditioning system. FIG. 3 is a diagram showing an example of a screen of an operation display device when inputting a filter cleaning time in the same air conditioning system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are merely one of the 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 3. 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. However, there are cases where a plurality of air-conditioned spaces 21 exist in a single section 23, and there are cases where a single air-conditioned space 21 straddles a plurality of sections 23. 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, a filter device 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 filter device 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 for sending air from the heat source machine 11 and an outside air duct 171 for introducing 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, the flow of air 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, an undercut of a room door) is schematically shown by a broken line 172. 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 uses pre-filters arranged at one or more locations in the path including the ventilation fan 19, the outside air duct 171 and the indoor unit 111 to allow air to be sent to the filter device 12 for dust and insects having a relatively large size. Removed before introduction.

As shown in FIG. 2, the indoor unit 111 includes a heat exchanger 113 and an air filter 114 that removes dust and the like from the air passing through the heat exchanger 113. The air filter 114 is preferably configured to collect dust and the like that are relatively smaller than the pre-filter. By providing the pre-filter in the air-conditioning system 10, it is possible to reduce the frequency of cleaning the air filter 114 of the indoor unit 111. The air from the indoor unit 111 is sent to the air supply duct 16 through the filter device 12. The filter device 12 has a filter performance capable of removing (collecting) particles having a relatively small particle size as compared with the air filter 114 of the indoor unit 111. The filter device 12 is preferably, for example, a HEPA filter (HEPA: High Efficiency Particulate Air). In the air conditioning system 10, if the filter device 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 an air conditioning operation in which the generated heat energy (cold air or warm air) is sent from the indoor unit 111. Specifically, 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. The 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 air conditioning system 10 of the present embodiment, the heat source machine 11 is always in operation, and the air conditioning operation is appropriately stopped, for example, in the intermediate period when the air conditioning operation is unnecessary. At this time, the heat source machine 11 may perform a blower operation. However, the air conditioning system 10 can stop the operation of the heat source machine 11 by the operation of the user. 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 ten dampers 14 in order to distribute the heat energy generated by the heat source machine 11 to the ten outlets 15. ing. In the air conditioning system 10, the two conveyor fans 13, the air supply duct 16, and the 10 dampers 14 constitute a distribution device 102 that distributes the heat energy generated by the heat source machine 11 to the 10 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. As a result, in the air conditioning system 10, the ratio of the heat energy generated by the heat source machine 11 to be distributed 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. The target temperature is a temperature used for determination or the like in the control device 30, and the control device 30 calculates the target temperature 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. 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 filter device 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.

Further, the heat source machine 11 has a filter cleaning function (first cleaning function) for cleaning the air filter 114 of the indoor unit 111 and a heat exchanger 113 for the indoor unit 111 as cleaning functions for cleaning the heat source machine 11. It has an internal cleaning function (second cleaning function).

The filter cleaning function is realized by the cleaning device 115 provided in the indoor unit 111 (see FIG. 2). The cleaning device 115 is configured to remove dust adhering to the air filter 114. Specifically, the cleaning device 115 includes a brush that scoops out the dust adhering to the air filter 114, a suction device that sucks the dust adhering to the air filter 114, and the like, and collects the collected dust through the exhaust duct of the building. Exhaust to the outside of 20.

The internal cleaning function is a function of cleaning the heat exchanger 113 by heating and drying the heat exchanger 113 in which dew condensation or the like is formed due to the cooling operation of the heat source machine 11 with warm air. The internal cleaning function can suppress the growth of mold and fungi in the heat exchanger 113 and reduce the odor. Since the air outlet of the indoor unit 111 is closed by the louver while the internal cleaning function is being executed, the generated warm air circulates inside the indoor unit 111. Therefore, the warm air generated during the execution of the internal cleaning function is not supplied to the air conditioning space 21. The louver of the indoor unit 111 may be open while the internal cleaning function is being executed.

The heat source machine 11 cannot execute the filter cleaning function and the internal cleaning function at the same time, and needs to execute the air conditioning operation for supplying cold air or warm air to the plurality of air conditioning spaces 21 in a stopped state. Therefore, when the heat source machine 11 executes the filter cleaning function or the internal cleaning function, the air conditioning operation is interrupted, and the air conditioning operation is restarted after the filter cleaning function or the internal cleaning function is completed. The time required for each filter cleaning function is, for example, about 60 minutes. The time required for each internal cleaning function is, for example, about 40 to 80 minutes.

In the air conditioning system 10, the control device 30 controls the heat source machine 11. The heat source machine 11 executes the filter cleaning function and the internal cleaning function according to the instruction from the control device 30.

As shown in FIG. 2, the control device 30 includes a cleaning control unit 31, a time setting unit 32, an interface unit 33, a counter 34, and a storage unit 35. The control device 30 can exchange information with the operation display device 40 via the interface unit 33.

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 cleaning control unit 31 outputs a filter cleaning instruction for causing the heat source machine 11 to execute the filter cleaning function and an internal cleaning instruction for causing the heat source machine 11 to execute the internal cleaning function. Specifically, the cleaning control unit 31 outputs a filter cleaning instruction to the heat source machine 11 when the current time reaches the filter cleaning time (first cleaning time). The heat source machine 11 executes the filter cleaning function when it receives a filter cleaning instruction from the cleaning control unit 31. Therefore, the heat source machine 11 executes the filter cleaning function every 24 hours.

The data of the filter cleaning time is stored in the storage unit 35. The storage unit 35 is composed of, for example, a flash memory such as a ROM (Read Only Memory), a RAM (Random Access Memory), or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 35 stores the default value of the filter cleaning time in advance. The default value of the filter cleaning time is, for example, 1:00 am. Further, the filter cleaning time can be changed by the operation of the operation display device 40 by the user. FIG. 3 is an example of the filter cleaning time input screen P1 in the operation display device 40. The user can input the "hour" and "minute" of the filter cleaning time from the pull-down menus. The button B1 on the input screen P1 is a button for determining the input filter cleaning time. When the button B1 is pressed, the operation display device 40 transmits the input filter cleaning time data to the control device 30. The control device 30 rewrites the filter cleaning time data stored in the storage unit 35 to the received filter cleaning time data.

Further, when the count number of the counter 34 reaches a predetermined number of times (for example, 30 times), the cleaning control unit 31 issues an internal cleaning instruction to the heat source machine 11 when the current time reaches the internal cleaning time (second cleaning time). Output. The heat source machine 11 executes the internal cleaning function when it receives an internal cleaning instruction from the cleaning control unit 31. The counter 34 is configured to count the number of times that the heat source machine 11 interrupts the cooling operation and executes the filter cleaning function. Therefore, since the filter cleaning function is executed every 24 hours, the heat source machine 11 executes the internal cleaning function every 30 days in the summer when the cooling operation is performed. In other words, the heat source machine 11 executes the cleaning function (filter cleaning function and internal cleaning function) twice within 24 hours (within a predetermined period) every 30 days in the summer when the cooling operation is performed. Further, the counter 34 resets the count number when the cleaning control unit 31 outputs an internal cleaning instruction. That is, the counter 34 counts the number of times the filter cleaning function is executed, starting from the time when the internal cleaning function is executed.

The internal cleaning time is set by the time setting unit 32. The time setting unit 32 sets the internal cleaning time based on the filter cleaning time. Specifically, the time setting unit 32 sets the internal cleaning time so that the time difference between the filter cleaning time and the internal cleaning time is a predetermined time or more (for example, 2 hours or more). In other words, in the time setting unit 32, the time difference between the end time of the filter cleaning function and the start time of the internal cleaning time, or the time difference between the end time of the internal cleaning function and the start time of the filter cleaning function is a certain time or more ( For example, set the internal cleaning time so that it is (1 hour or more).

In the present embodiment, as a candidate for the time zone of the internal cleaning time, there are a night time zone including midnight and a daytime zone including daytime, and the time setting unit 32 sets the internal cleaning time to the night time zone or the daytime zone. Set to the time of. The night time zone is, for example, from 1:00 am to 4:00 am, which is a time zone in which the outside temperature is relatively low during the day and the resident is assumed to be sleeping. The daytime zone is, for example, from 10 am to 11 am, and the amount of solar radiation into the building 20 is small because the altitude of the sun is relatively high during the day, and the outside temperature has not risen to the maximum temperature. It is an assumed time zone.

The storage unit 35 stores a plurality of time zones in which one day is divided and a data table showing a plurality of time data corresponding to the plurality of time zones on a one-to-one basis. In the data table, when the time corresponding to the time zone including the filter cleaning time is set as the internal cleaning time, the time difference between the filter cleaning time and the internal cleaning time is equal to or more than the predetermined time, and the internal cleaning time is the night time zone or noon. It is set to be the time zone. Based on the data table, the time setting unit 32 sets the time corresponding to the time zone including the filter cleaning time as the internal cleaning time. An example of the data table is shown in Table 1.

In the example shown in Table 1, the day is divided into three time zones (first to third time zones). When the filter cleaning time is included in the first time zone from 4:00 am to 22:59 pm, the time setting unit 32 sets 1:00 am in the night time zone as the internal cleaning time. When the filter cleaning time is included in the second time zone from 23:00 pm to 1:59 am, the time setting unit 32 sets 4:00 am in the night time zone as the internal cleaning time. When the filter cleaning time is included in the third time zone from 2:00 am to 3:59 am, the time setting unit 32 sets 11:00 am in the daytime zone as the internal cleaning time. That is, when the internal cleaning time can be set to the night time zone based on the filter cleaning time, the time setting unit 32 sets the internal cleaning time to the night time zone and cannot set the internal cleaning time to the night time zone. If, set the internal cleaning time to the daytime zone.

When the control device 30 stops the cooling operation of the heat source machine 11 by the user's operation, the cleaning control unit 31 outputs an internal cleaning instruction to the heat source machine 11, and the heat source machine 11 executes the internal cleaning function. In this case, the counter 34 resets the count number. When the control device 30 stops the heating operation of the heat source machine 11 by the user's operation, the heat source machine 11 does not execute the internal cleaning function.

Next, a modified example of the air conditioning system 10 will be described.

In the above example, the heat source machine 11 executes the cleaning function (filter cleaning function, internal cleaning function) at the timing of receiving the instruction (filter cleaning instruction, internal cleaning instruction) from the cleaning control unit 31 of the control device 30. However, it is not limited to this. The cleaning control unit 31 outputs an instruction indicating the time when the cleaning function is executed to the heat source machine 11, and the heat source machine 11 is configured to execute the cleaning function at the time indicated by the instruction from the cleaning control unit 31. It may have been done.

The time setting unit 32 may be configured to set the internal cleaning time based on the user's absence schedule. The control device 30 can input the absence schedule by the operation of the operation display device 40 by the user. This absence schedule may be in the form in which the user inputs the scheduled date and time of going out in advance, or in the form of the user inputting the scheduled date and time of returning home when going out. The absence schedule input by the operation display device 40 is stored in the storage unit 35 of the control device 30.

When it is estimated that the time difference between the filter cleaning time and the internal cleaning time is equal to or longer than a predetermined time and the internal cleaning function is completed while the user is absent (while going out), the time setting unit 32 is in the absence of the user. Set the time to the internal cleaning time. When the time zone in which the user is absent includes the night time zone or the daytime zone, the time setting unit 32 sets the internal cleaning time to the night time zone or the daytime zone during the user's absence time zone. Set to time.

Further, in the above-mentioned air conditioning system 10, the case where the first cleaning function is the filter cleaning function and the second cleaning function is the internal cleaning function has been described, but the present invention is not limited to this. The first cleaning function and the second cleaning function need only be two cleaning functions executed within 24 hours (within a predetermined period), and the first cleaning function and the second cleaning function are the same cleaning function. It may be. For example, the first cleaning function is a normal filter cleaning performed every 24 hours, and the second cleaning function is a regular filter cleaning that carefully cleans the air filter 114 every month, within 24 hours every month. Normal filter equipment and regular filter cleaning are performed. Further, the predetermined period is not limited to 24 hours, and may be a period shorter than 24 hours or a longer period.

Further, the building 20 is not limited to a detached house, and may be another building such as an apartment house or a store. Further, in the above-mentioned air conditioning system 10, a HEPA filter is adopted as the filter device 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.

As described above, the air conditioning system 10 according to the first aspect includes a heat source machine 11, a distribution device 102, 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 control device 30 controls the heat source machine 11 and the distribution device 102. The heat source machine 11 has a cleaning function of interrupting the air conditioning operation of supplying heat energy to the plurality of air conditioning spaces 21 to clean the heat source machine 11. The control device 30 includes a cleaning control unit 31 and a time setting unit 32. The cleaning control unit 31 instructs the heat source machine 11 to execute the cleaning function. In the time setting unit 32, when the cleaning control unit 31 executes the cleaning function twice within 24 hours, the first cleaning time in which the first cleaning function (filter cleaning function) of the two cleaning functions is executed is executed. The second cleaning time (internal cleaning time) at which the second cleaning function (internal cleaning function) is executed is set based on (filter cleaning time). The time setting unit 32 sets the second cleaning time so that the time difference between the first cleaning time and the second cleaning time is equal to or longer than a predetermined time.

With this configuration, in the air conditioning system 10, the time during which the air conditioning operation is interrupted by the execution of the first cleaning function and the time during which the air conditioning operation is interrupted by the execution of the second cleaning function are deviated from each other, so that the air conditioning operation is continuous. The interruption time is shortened. As a result, the air conditioning system 10 suppresses the temperature change of the air conditioning space 21 due to the first cleaning function and the second cleaning function, as compared with the case where the first cleaning function and the second cleaning function are continuously executed. It becomes possible to do. Further, the first cleaning time when the first cleaning function is executed and the second cleaning time when the second cleaning function is executed are temporally separated from each other. Therefore, it is possible to restore the temperature of the air-conditioned space 21 that has changed during the execution of one cleaning function by the time the other cleaning function is executed.

In the air conditioning system 10 according to the second aspect, in the first aspect, the heat source machine 11 is preferably an air conditioner including an air filter 114 and a heat exchanger 113. It is preferable that the first cleaning function is a filter cleaning function for cleaning the air filter 114, and the second cleaning function is an internal cleaning function for cleaning the heat exchanger 113.

With this configuration, the air conditioning system 10 can suppress the temperature change of the air conditioning space 21 due to the filter cleaning function and the internal cleaning function, as compared with the case where the filter cleaning function and the internal cleaning function are continuously executed.

In the air conditioning system 10 according to the third aspect, in the first or second aspect, the predetermined period is 24 hours, and the time setting unit 32 is a night time zone including midnight as a candidate for the time zone of the second cleaning time. It is preferable that there is a daytime zone including daytime. The time setting unit 32 sets the second cleaning time to the night time zone when the second cleaning time can be set to the night time zone, and cannot set the second cleaning time to the night time zone. , It is preferable to set the second cleaning time to the daytime zone.

With this configuration, the air conditioning system 10 has a higher priority in the night time zone and the daytime zone, which are candidates for the second cleaning time, in the night time zone where the outside temperature is relatively low. It is possible to suppress the temperature change of the air-conditioned space 21 due to the execution of the cleaning function.

In the air conditioning system 10 according to the fourth aspect, in any one of the first to third aspects, the control device 30 has an operation unit (operation display device 40) that can be operated by the user, and by the operation of the operation unit by the user. It is preferable that the user's absence schedule can be input. When it is estimated that the second cleaning function is completed while the user is absent based on the absence schedule, the time setting unit 32 preferably sets the second cleaning time to the time when the user is absent.

This configuration makes it possible to perform the second cleaning function in the absence of the user.

The control device 30 according to the fifth aspect is used in the air conditioning system 10 according to any one of the first to fourth aspects.

With this configuration, the control device 30 can change the temperature of the air-conditioned space 21 due to the first cleaning function and the second cleaning function as compared with the case where the first cleaning function and the second cleaning function are continuously executed. It becomes possible to suppress.

10 Air conditioning system 11 Heat source machine (air conditioner)
113 Heat exchanger 114 Air filter 20 Building 21 Air conditioning space 30 Control device 31 Cleaning control unit 32 Time setting unit 40 Operation display device (operation unit)
102 Distributor

Claims (4)

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.
The heat source machine and the control device for controlling the distribution device are provided.
The heat source machine has a cleaning function of interrupting the air conditioning operation of supplying the heat energy to the plurality of air conditioning spaces to clean the heat source machine.
The control device is
A cleaning control unit that instructs the heat source machine to execute the cleaning function,
When the cleaning control unit executes the cleaning function twice within a predetermined period, the second cleaning function is performed based on the first cleaning time when the first cleaning function is executed out of the two cleaning functions. It has a time setting unit that sets the second cleaning time to be executed.
The time setting unit sets the second cleaning time so that the time difference between the first cleaning time and the second cleaning time is equal to or greater than a predetermined time .
The predetermined period is 24 hours.
The time setting unit
Candidates for the second cleaning time zone include a night time zone including midnight and a daytime zone including daytime.
When the second cleaning time can be set in the night time zone, the second cleaning time is set in the night time zone.
An air conditioning system characterized in that when the second cleaning time cannot be set in the night time zone, the second cleaning time is set in the daytime zone. The heat source machine is an air conditioner equipped with an air filter and a heat exchanger.
The air conditioning according to claim 1, wherein the first cleaning function is a filter cleaning function for cleaning the air filter, and the second cleaning function is an internal cleaning function for cleaning the heat exchanger. system. The control device has an operation unit that can be operated by the user.
By operating the operation unit by the user, it is possible to input the absence schedule of the user.
When it is estimated that the second cleaning function is completed while the user is absent based on the absence schedule, the time setting unit sets the second cleaning time to the time when the user is absent.
The air conditioning system according to claim 1 or 2. A control device used in the air conditioning system according to any one of claims 1 to 3.

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