JP4408285B2 - Auxiliary cooling device - Google Patents

Description

  The present invention relates to an auxiliary cooling device that intermittently sprays water on a heat exchanger mounted on an outdoor unit of an air conditioner to cool the heat exchanger in an auxiliary manner.

  2. Description of the Related Art Conventionally, an auxiliary cooling device is known in which a heat exchanger of an outdoor unit of an air conditioner is auxiliaryly cooled to increase cooling capacity and save power in the air conditioner. In such an auxiliary cooling device, as shown in Patent Document 1, water is intermittently sprayed from a spray unit disposed in an outdoor unit to a heat exchanger, and heat is generated using the sensible heat and latent heat of evaporation of the water. I try to cool the exchanger. This spray unit detects that the air conditioner is in operation by the operation of a compressor provided in the outdoor unit, and determines whether or not the heat exchanger needs to be cooled based on the outside air temperature or the like. When it is determined that the heat exchanger needs to be cooled, water is intermittently sprayed based on a predetermined spray pattern according to the operating state of the outdoor unit.

In addition, when such an auxiliary cooling device is used for an outdoor unit of a plurality of air conditioners, such as a building air conditioner, a spray unit that performs intermittent spraying according to the operating state of each outdoor unit is provided. It is provided for each outdoor unit. And each spray unit of an auxiliary cooling device is supplied with water from a common water supply facility.
JP 2006-10150 A

  By the way, in the auxiliary cooling device used for the plurality of outdoor units as described above, intermittent spraying is performed separately for each spraying unit, so that the spraying timing of each spraying unit becomes inconsistent. ing. For this reason, it is necessary to set the water supply equipment of the auxiliary cooling device that supplies water to the spray unit so as to ensure a certain amount of water when spraying is simultaneously performed in each spray unit. However, when water supply equipment is set up in this way, pipes, pumps, valves, etc. that match the maximum amount of water that is expected to be used will be used, so if all outdoor units are not in operation or if the spray period is In many situations, such as when there is a deviation, water supply equipment with excessive capacity is used.

  The present invention has been made in view of such circumstances, and its purpose is to operate each spray unit with the minimum necessary water supply equipment without impairing the spray pattern set for each spray unit. It is to provide an auxiliary cooling device that can.

An auxiliary cooling device according to claim 1 is an auxiliary cooling device that intermittently sprays water on each heat exchanger in an outdoor unit of a plurality of air conditioners to cool the heat exchanger in an auxiliary manner. A spray unit that is provided in each outdoor unit and performs intermittent spraying according to a predetermined spray pattern according to the operating state of each outdoor unit, a water supply facility that supplies water to be sprayed to each spray unit, and a communication with each spray unit A communication adapter that can be connected, and the communication adapter acquires the operating state of each spray unit and simultaneously supplies the spray period of the spray unit in which intermittent spray is performed based on the spray pattern. There and sets orderly so that the water supply capacity range of water supply, have a control unit for generally controlling the intermittent spraying of the spray unit based on the set spray period, before Each spray unit has a number of spray nozzles corresponding to the output of the corresponding air conditioner, and a priority spray order indicating a priority order when intermittent spray is performed is preset in each spray unit. The control means divides the spray units in which intermittent spray is simultaneously performed based on the priority spray order set in each spray unit, and sprays are sequentially performed for each group of spray units. In addition, the spraying period of each spraying unit is set, and the control means selects the spraying unit having the higher priority spraying order among the spraying units to be selected in selecting the spraying unit determined as one group. If a unit is selected and the amount of water supplied to the selected spray unit exceeds the water supply capacity of the water supply facility, the unit has already been selected. Among the spray unit, the priority spray ranking excludes the lower spray unit from the group, characterized by adding selected less other spray unit number of nozzles relative to the spray unit were excluded.

  According to the same structure, the spray unit which performs intermittent spraying by the predetermined spray pattern according to the driving | running state of each outdoor unit is connected so that it can communicate with a communication adapter. Then, the communication adapter control means acquires whether or not each spray unit is in an operating state, and simultaneously determines the spray period of the spray unit in which intermittent spray is performed based on the amount of water supplied based on the spray pattern. While setting in order so that it may become in the water supply capacity range of an installation, the intermittent spray of each spray unit is integratedly controlled based on the set spray period. For this reason, it is possible to match the spray periods among a plurality of spray units that are intermittently sprayed simultaneously by the overall control of the control means, and the amount of water supplied to each spray unit exceeds the water supply capacity range of the water supply facility. Such a situation can be avoided.

Further, since the control means orders the spray periods of the spray units so that the amount of water to be supplied falls within the water supply capacity range of the water supply equipment, the water supply capacity of the water supply equipment can be kept as low as possible. . That is, if the water supply equipment is configured so that at least the average amount of water used per hour when all spray units perform intermittent spraying can be supplied, the amount of supplied water will be insufficient due to the setting of the spray period by the control means. Can be prevented. For this reason, each spray unit can be operated with the minimum required water supply equipment without impairing the spray pattern set for each spray unit. Therefore, it is not necessary to use a large-capacity water supply facility that can cope with a state where all spray units have overlapping spray periods, so that it is possible to reduce the size of the water supply pipes, pumps, valves, and the like and reduce the quantity used. Equipment costs and construction costs can be reduced.
Furthermore, according to the same configuration, the control means of the communication adapter sets the spray period of each spray unit based on the priority spray order set in advance for each spray unit. If there is an air conditioner that is strongly required to reduce the heat exchanger, the heat exchanger is preferentially cooled by setting the priority spraying order of the spraying units provided in the outdoor unit to the higher order. A spraying period can be set. Further, according to the same configuration, the control means of the communication adapter divides the spray units that are intermittently sprayed at the same time, and sets the spray period of each spray unit so that the spray is sequentially performed for each group of spray units. Therefore, the overall control of intermittent spraying can be facilitated by setting the spraying period for each group.
Furthermore, according to the same structure, the spray unit added to a group can be selected so that more spray units may be sprayed simultaneously within the water supply capacity range.

Further, the auxiliary cooling device according to claim 2 is an auxiliary cooling device that intermittently sprays water on each heat exchanger in an outdoor unit of a plurality of air conditioners and auxiliaryly cools the heat exchanger. A spray unit that is provided in each outdoor unit and performs intermittent spraying according to a predetermined spray pattern according to the operating state of each outdoor unit, a water supply facility that supplies sprayed water to each spray unit, and each spray unit A communication adapter that is communicably connected to the communication adapter. The communication adapter acquires an operating state of each spray unit and supplies a spray period of the spray unit in which intermittent spraying is performed simultaneously based on the spray pattern. Control means for controlling the intermittent spraying of each spraying unit based on the set spraying period in order so that the amount of water to be supplied falls within the water supply capacity range of the water supply facility. , Each spray unit has a nozzle for spraying the number of which corresponds to the output of the corresponding air conditioner, the control means, spray periods overlap when spraying is started in the subject spray unit spraying When the total number of nozzles of the number of nozzles of the unit is larger than the maximum number of nozzles that can be sprayed simultaneously converted from the water supply capacity of the water supply facility, the amount of water supplied is determined as the spray period of the target spray unit. Is delayed until it falls within the water supply capacity range of the water supply facility.

  According to the same structure, the spray unit which performs intermittent spraying by the predetermined spray pattern according to the driving | running state of each outdoor unit is connected so that it can communicate with a communication adapter. Then, the communication adapter control means acquires whether or not each spray unit is in an operating state, and simultaneously determines the spray period of the spray unit in which intermittent spray is performed based on the amount of water supplied based on the spray pattern. While setting in order so that it may become in the water supply capacity range of an installation, the intermittent spray of each spray unit is integratedly controlled based on the set spray period. For this reason, it is possible to match the spray periods among a plurality of spray units that are intermittently sprayed simultaneously by the overall control of the control means, and the amount of water supplied to each spray unit exceeds the water supply capacity range of the water supply facility. Such a situation can be avoided.
  Further, since the control means orders the spray periods of the spray units so that the amount of water to be supplied falls within the water supply capacity range of the water supply equipment, the water supply capacity of the water supply equipment can be kept as low as possible. . That is, if the water supply equipment is configured so that at least the average amount of water used per hour when all spray units perform intermittent spraying can be supplied, the amount of supplied water will be insufficient due to the setting of the spray period by the control means. Can be prevented. For this reason, each spray unit can be operated with the minimum required water supply equipment without impairing the spray pattern set for each spray unit. Therefore, it is not necessary to use a large-capacity water supply facility that can cope with a state where all spray units have overlapping spray periods, so that it is possible to reduce the size of the water supply pipes, pumps, valves, etc. Equipment costs and construction costs can be reduced.
  Furthermore, according to the same configuration, the spray amount of each spray unit and the water supply capacity of the water supply facility can be replaced with the number of nozzles for easy comparison, and the spray period of the target spray unit is temporarily changed. Thus, by delaying, it is possible to suppress the occurrence of a period in which the amount of supplied water is insufficient.

Further, the auxiliary cooling device according to claim 2, wherein each spray unit, priority spraying priority is set in advance, said control means for indicating the order of priority is the intermittent spraying is performed, sets the respective spray units The spray units that are intermittently sprayed simultaneously based on the priority spray order are grouped, and the spray period of each spray unit is set so that spraying is sequentially performed for each group of spray units, and In the selection of the spray unit determined as one group, the control means selects the spray unit with the higher priority spray order from the spray units to be selected and supplies the selected spray unit to the selected spray unit. When the amount of water to be discharged exceeds the water supply capacity of the water supply facility, the priority spray order among the spray units already selected By excluding the lower spray unit from the group, it may be added elect a lesser other spray unit number of nozzles relative to the spray unit were excluded.

According to this configuration, since the control means of the communication adapter sets the spray period of each spray unit based on the priority spray order set in advance for each spray unit, for example, ensuring the cooling capacity is indispensable and reducing the cooling load If there is an air conditioner that is strongly demanded, the spray period is set so that the heat exchanger is preferentially cooled by setting the priority spray order of the spray units installed in the outdoor unit higher. Can be set. Further , according to the same configuration, the control means of the communication adapter divides the spray units that are intermittently sprayed at the same time, and sets the spray period of each spray unit so that the spray is sequentially performed for each group of spray units. Therefore, the overall control of intermittent spraying can be facilitated by setting the spraying period for each group.
Furthermore, according to the same structure, the spray unit added to a group can be selected so that more spray units may be sprayed simultaneously within the water supply capacity range.

Further, the apparatus further includes a measuring unit that measures a flow rate or a flow rate of water flowing through the water supply facility, and the control unit feedback-controls the intermittent spray of each spray unit based on a measurement result by the measuring unit. Also good.

According to the same configuration, the control means of the communication adapter feedback-controls the intermittent spraying of each spray unit based on the measurement result of the flow rate or flow rate of the water flowing through the water supply facility, so that the spray state from the spray unit and the water supply capacity This makes it possible to more accurately set the spraying period by grasping the margin of the actuality from the actual measurement values.

Further, in the auxiliary cooling device according to claim 5, the water supply facility is configured such that water is supplied to each spray unit through a water supply pipe branched on the downstream side, and a pipe diameter of the water supply pipe is a nozzle When it is assumed that spraying is performed for each group in which the number is equally divided, the number is selected based on the number of spray nozzles that are sprayed simultaneously.

Further, in the auxiliary cooling device according to claim 1 or 3, in the selection of the spray unit determined as one group, the control means has a total number of nozzles obtained by totaling all the nozzle numbers of the selected spray unit, When it is larger than the maximum number of nozzles that can be sprayed simultaneously converted from the water supply capacity of the water supply facility, among the spray units that have already been selected, the spray unit with the lower priority spray order is excluded from the group. Alternatively, another spray unit having a smaller number of nozzles than the excluded spray unit may be additionally selected .

Further, in the auxiliary cooling device according to claim 2, a priority spray order indicating a priority order when intermittent spray is performed is preset in each spray unit, and the target spray unit is a plurality of units. The control means selects a target spray unit that can be sprayed within the water supply capacity range of the water supply facility in the order of the priority spray order, starts spraying the selected target spray unit, and other target sprays. You may make it delay the spray period of a unit until the amount of water supplied becomes in the water supply capability range of the said water supply equipment .

  Further, in the auxiliary cooling device according to claim 5, the number of spray nozzles is the total number of nozzles obtained by adding the number of nozzles of the spray unit, and the spray period of the spray unit during one cycle of intermittent spray in the spray unit. It is characterized by being divided by the smallest number of groups out of the number of groups, which is a number representing how many spray periods can be provided so as not to overlap.

According to the present invention, the spray period of the spray unit provided in each outdoor unit of the plurality of air conditioners is such that the amount of water supplied by the control means of the communication adapter falls within the water supply capacity range of the water supply facility. Since the overall control is performed, it is not necessary to use a large-capacity water supply facility that can cope with a state in which the spray periods of all the spray units overlap. For this reason, each spray unit can be operated with the minimum required water supply equipment without impairing the spray pattern set for each spray unit, and the equipment such as piping, pumps, valves, etc. can be downsized and the quantity used can be reduced. Therefore, facility costs and construction costs can be reduced. Furthermore, it is possible to suppress the selection of the spray units to be added to the group so that more spray units are sprayed at the same time within the water supply capacity range, or the occurrence of a period in which the amount of supplied water is insufficient.

Hereinafter, an embodiment of an auxiliary cooling device embodying the present invention will be described with reference to FIGS.
FIG. 1 is a schematic diagram showing the configuration of the auxiliary cooling device 1 and the outdoor unit 40 of the air conditioner. The auxiliary cooling device 1 intermittently sprays water on the heat exchangers of the plurality of outdoor units 40 to cool the heat exchangers in an auxiliary manner. The auxiliary cooling device 1 includes a spray unit 10 that performs intermittent spraying according to a predetermined spray pattern according to the operating state of each outdoor unit 40, a water supply facility 20 that supplies sprayed water to each spray unit 10, and each spray unit. 10 and a communication adapter 30 connected to be communicable with each other.

  The spray unit 10 is provided in each outdoor unit 40 and intermittently sprays water on the heat exchanger of the outdoor unit 40. The intermittent spraying is performed by a predetermined spraying pattern in which a spraying period for spraying water and a drying period for stopping the spraying of water are alternately repeated at a constant cycle. FIG. 2 is a schematic sectional view of the outdoor unit 40 on which the spray unit 10 is mounted. The outdoor unit 40 is disposed on the roof of a building or the like, and is connected to an indoor unit (not shown) via a communication pipe. The outdoor unit 40 includes a heat exchanger 42 disposed in the casing 41 and a fan 43 disposed so as to face the heat exchanger 42. During operation of the air conditioner, outside air is sucked from the heat exchanger 42 side by the rotation of the fan 43. The heat exchanger 42 is configured by passing a plurality of refrigerant tubes 45 through a plurality of fins 44, and performs heat exchange with air sucked by the fan 43 during cooling operation, thereby cooling the refrigerant flowing through the refrigerant tubes 45. . In addition, the outdoor unit 40 in which the spray unit 10 is mounted may be one in which the heat exchanger 42 and the fan 43 are arranged in different forms.

  The spray unit 10 includes a nozzle 11 that sprays water on the heat exchanger 42 and a spray control unit 12 that controls the spray mode of water. The nozzle 11 is attached to the outdoor unit 40 by the attachment frame 13 and is connected to a pipe 14 to which water is supplied via the spray control unit 12. The spray control unit 12 is disposed on the upper surface of the outdoor unit 40, and includes a control board 15 that controls spray control, an electromagnetic valve 16 provided on the pipe 14, and a thermistor 17 that detects the outside air temperature. ing. The control board 15 is connected to a discharge pipe thermostat (not shown) that detects the temperature of the discharge pipe of the compressor mounted on the outdoor unit 40. Based on the temperature of the discharge pipe, the control board 15 detects whether or not the compressor is in an operating state, and determines whether or not the air conditioner is in operation.

  The electromagnetic valve 16 is a switching valve that is switched between an open state and a closed state, and is opened and closed by the control board 15. When the solenoid valve 16 is opened, water is supplied to the nozzle 11 through the pipe 14, and water is sprayed from the nozzle 11 to the heat exchanger 42.

  The detection signal of the thermistor 17 is input to the control board 15. When the control board 15 detects that the outside air temperature has become equal to or higher than a predetermined temperature based on the detection signal of the thermistor 17, it determines that the cooling load is large. That is, when the control board 15 determines that the air conditioner is in operation and detects that the outside air temperature has become equal to or higher than a predetermined temperature, the control board 15 determines that the cooling load of the air conditioner has increased, Start intermittent spraying. When water is sprayed from the nozzle 11 to the heat exchanger 42, the heat exchanger 42 is cooled by the sensible heat and latent heat of vaporization of the sprayed water, and the cooling capacity increases.

  As shown in FIG. 1, the water supply facility 20 is configured such that water is taken out from an existing water tap 21 and water is supplied to each spray unit 10 through a water supply pipe 22. The water supply pipe 22 is provided with a water supply valve 23 and a pressurizing device 24. The water supply valve 23 switches between a water supply enabled state and a water supply stop state to each spray unit 10 by opening and closing thereof. The pressurizing device 24 is installed when the water pressure at the faucet 21 is insufficient, and ensures the amount of water supply by increasing the water pressure with a pump. The water supply pipe 22 is branched downstream and connected to the spray control unit 12 of each spray unit 10.

  The communication adapter 30 includes a controller 31 as a control unit that performs overall control of intermittent spraying of each spray unit 10. The controller 31 and the control board 15 of each spray unit 10 are serially connected by a cable 32, whereby communication is performed between the controller 31 and the control board 15. Each control unit 15 of each spray unit 10 has a unique address. The controller 31 controls intermittent spraying of each spray unit 10 by transmitting and receiving data corresponding to the address.

  Next, the connection form of the communication adapter 30 and each spray unit 10 in the auxiliary cooling device 1 will be described using a specific example. FIG. 3 is a block diagram showing an example of the connection form. Sixteen spray units 10a, 10b, 10c... 10p are serially connected to the communication adapter 30. Each spray unit 10 has a number of nozzles 11 corresponding to the output of the corresponding air conditioner. The six spray units 10a, 10f, 10h, 10j, 10m, and 10p have an air conditioner output of 6 horsepower (HP), and each spray unit has 1.6 nozzles correspondingly. is doing. The four spray units 10c, 10e, 10k, 10n have an air conditioner output of 16 HP, and each spray unit has 4.8 nozzles correspondingly. The three spray units 10d, 10g, 10o have an air conditioner output of 30 HP, and each spray unit has 12 nozzles correspondingly. The three spray units 10b, 10i, and 10l have an air conditioner output of 60 HP, and each spray unit has 24 nozzles correspondingly. The number of nozzles of each spray unit 10 is input to the controller 31 of the communication adapter 30. The number of nozzles used here is expressed as the number of nozzles including a numerical value after the decimal point because the spray capacity of the nozzle 11 is set so as to be consistent between the spray units 10.

  Moreover, the priority spray order which shows the priority when intermittent spraying is performed is preset by the 16 spray units 10a, 10b, 10c ... 10p. For example, when there is an air conditioner in which it is indispensable to ensure the cooling capacity and the reduction of the cooling load is strongly required, the priority spray order of the spray unit 10 provided in the outdoor unit 40 is set higher. In the auxiliary cooling device 1 of FIG. 3, the priority spraying order is set to be first, second,... In the order of the spray units 10a, 10b. The priority spray order of each spray unit 10 is input to the controller 31 of the communication adapter 30.

  Next, in the auxiliary cooling device 1 configured as described above, a method for selecting the water supply pipe 22 for supplying water to the spray unit 10 will be described. The water supply facility 20 is generally set so as to ensure a certain amount of water when spraying is simultaneously performed in each spray unit 10, but in the present embodiment, each of the water supply facilities 20 is controlled by the controller 31 of the communication adapter 30 described later. Since the spraying period at the time of intermittent spraying is matched between the spray units 10, the water supply pipe 22 is selected in which the amount of water that can be supplied is minimized. That is, the water supply pipe 22 is selected so that at least the average amount of water used per hour when all the spray units 10 perform intermittent spraying can be supplied. As a result, the capacity of the water supply facility 20 is reduced to reduce facility costs and construction costs. Below, the specific selection method of the water supply piping 22 is demonstrated using the structural example of FIG.

  When selecting the water supply pipe 22, first, the total number of nozzles Na provided in the auxiliary cooling device 1 is obtained. The total number of nozzles Na is obtained by adding the number of nozzles of the 16 spraying units 10, and in this case, it is 136.8.

  Next, the smallest group number Gn among all the spray units 10 is obtained. The number of groups is a number representing how many spray periods can be provided so that the spray periods of the spray unit 10 do not overlap during one cycle of intermittent spray in a spray unit 10. FIG. 4A shows the standard time of the spray period, the standard time of the dry period, and the number of groups of each spray unit 10. As shown in the figure, the spraying period and the drying period of each spray unit 10 are different in time depending on the output of the mounted air conditioner, so the number of groups also varies among the spray units 10. For example, in the spray unit 10 mounted on a 6HP air conditioner, one cycle of intermittent spray is 16.5 seconds, and three groups of spray periods can be sequentially provided as shown in FIG. As a result, the number of groups is 3. Further, when the number of groups is obtained in the same procedure, the number of groups of the spray units 10 mounted on the 16 HP air conditioner is 3, and the number of groups of the spray units 10 mounted on the 30 HP and 60 HP air conditioners is 4. It becomes. For this reason, 3 is obtained as the smallest group number Gn.

  Next, the number of spray nozzles Nb when the spray units 10 are grouped into the group number Gn so that the number of nozzles in each group is equal is obtained. The number of spray nozzles Nb indicates the maximum number of nozzles sprayed at the same time when spraying is performed for each group in which the number of nozzles is equally divided. The spray nozzle number Nb is obtained by dividing the total nozzle number Na by the group number Gn, and is 45.6 in the configuration of FIG.

  Next, the pipe diameter of the water supply pipe 22 is obtained based on the number of spray nozzles Nb. FIG. 4C is a table showing the relationship between the maximum number of nozzles sprayed simultaneously and the pipe diameter of the water supply pipe 22 required at that time. This table shows the relationship between the number of nozzles and the pipe diameter when the spray amount per nozzle is 73.5 (liters / hour). In the configuration of FIG. 3, since the number of spray nozzles Nb is 45.6, a pipe diameter of 30A is selected. That is, if a pipe diameter of 30 A or more is selected as the water supply pipe 22 of the water supply equipment 20, the amount of water supplied can be ensured even when intermittent spraying is simultaneously performed in each spray unit 10.

  The maximum number of nozzles Nc calculated from the pipe diameter of the selected water supply pipe 22 is set in the controller 31 of the communication adapter 30. The maximum nozzle number Nc indicates the maximum number of nozzles through which the selected water supply pipe 22 can simultaneously supply water. In the configuration of FIG. 3, since the pipe diameter of the water supply pipe 22 is 30A, the maximum number of nozzles in 30A of FIG. 4C, that is, 57.1 is the maximum nozzle number Nc.

  Next, overall control of intermittent spraying of each spray unit 10 performed by the controller 31 of the communication adapter 30 will be described. The controller 31 acquires the operating state of each spray unit 10 and sets the spray period of the spray unit 10 in which intermittent spraying is performed at the same time so that the amount of supplied water falls within the water supply capacity range of the water supply facility 20. Set. When setting the spray periods of the spray units 10 in order, the controller 31 prevents the total number of nozzles of the spray units 10 with overlapping spray periods from exceeding the maximum nozzle number Nc. The amount of water to be supplied is set within the water supply capacity range of the water supply facility 20.

  FIG. 5 is a time chart showing the spray order of the spray units 10 set by the controller 31 in the configuration of FIG. FIG. 5 shows an example of spraying when all 16 spray units 10 are in an operating state, that is, in a state where intermittent spraying is performed. Moreover, the time corresponding to the range enclosed by the frame in a figure has shown the spray period of each spray unit 10, and a priority, an output, spray time, and the number of nozzles are described in the frame.

  The controller 31 sets the spray period in the 16 spray units based on a predetermined time (when the time in FIG. 5 is 0), and first sets the spray period of the first spray performed first after the predetermined time. At this time, the controller 31 divides the spray units 10 for which intermittent spray is performed at the same time, and sets the spray period of the initial spray so that the spray is sequentially performed for each group of the spray units 10. The grouping of the spray units 10 is performed based on the priority spray order set for each spray unit 10. That is, the controller 31 performs grouping so that the spray unit 10 with the higher priority spray order belongs to the group sprayed first.

  As shown in FIG. 5, the controller 31 selects the spray units 10a, 10b, 10c, 10d, 10e, 10f, 10h, 10j, and 10k as the first group, and spray units 10g, 10i, 10m, 10n, 10o, 10p is selected as the second group, and the spray unit 10l is selected as the third group. And a spray period is provided in order of a 1st group, a 2nd group, and a 3rd group, and spraying is performed in this group order. The total number of nozzles Nd in the lower stage is the sum of the nozzles that are sprayed at each time. By setting the spray period as described above, spraying is performed in order so that the total nozzle number Nd does not exceed the maximum nozzle number Nc at any time.

  The controller 31 causes each spray unit 10 to spray according to a predetermined spray pattern for each spray unit 10 after the first spray is executed. As shown in FIG. 5, each spray unit 10 performs the second and subsequent sprays in each spray pattern as shown in the spray period and the drying period in FIG.

  FIG. 6 is a flowchart of a spray execution routine showing the control performed by the controller 31 when such intermittent spraying is performed. This spray execution routine is repeatedly executed at predetermined timings in a state where the communication adapter 30 is connected to each spray unit 10 so as to be communicable. When the spray execution routine is started, the controller 31 checks the preset maximum nozzle number Nc (step S110). Next, the controller 31 acquires the operating state of each spray unit 10 (step S120). Each spray unit 10 performs intermittent spraying when the corresponding air conditioner is in operation and the outside air temperature is equal to or higher than a predetermined temperature. The controller 31 acquires which spray unit 10 is in a state of performing intermittent spraying among all the spray units.

  Next, the controller 31 selects the first group of spray units 10 to be sprayed for the first time from the spray units 10 in the state of performing the intermittent spray acquired in step S120 based on the maximum number of nozzles Nc confirmed in step S110. The selected spray unit 10 is sprayed (step S130). Next, the controller 31 selects the second group of spray units 10 to be sprayed for the first time from the spray units that were not sprayed in step S130 based on the maximum number of nozzles Nc, and sprays the selected spray unit 10 to spray. This is performed (step S140). Then, spraying is performed for each group according to the same procedure, and the last nth group spray unit 10 divided into groups is selected and sprayed (step S150), whereby all sprays for which intermittent spraying is performed are performed. The first spray of the unit 10 is terminated. After the first spraying is completed, each spray unit 10 is continuously sprayed by a predetermined spray pattern for each spray unit 10 (step S160), and the spray execution routine is terminated at the predetermined timing.

  Here, selection of the spray unit 10 processed in steps S130 to S150 of the spray execution routine will be described. FIG. 7 is a flowchart of a spray unit selection routine executed by the controller 31 when the spray unit 10 is selected in these steps. When the spray unit selection routine is started, the controller 31 selects the spray unit with the highest priority among the spray units 10 to be selected (step S210). For example, when all the spray units are in a state of performing intermittent spray as shown in FIG. 5, when the first group of spray units is selected in step S130 of the spray execution routine, the spray unit 10a with the highest priority is selected. Elected. In addition, when the second group of spray units is selected in step S140 of the spray execution routine after the first group of FIG. 5 performs spraying, the spray unit 10g with the seventh highest priority is selected.

  Next, the controller 31 compares the maximum nozzle number Nc with the accumulated nozzle number Ne (step S220). The accumulated nozzle number Ne is a value obtained by adding up all the nozzle numbers of the spray unit 10 selected by the controller 31 until this step is processed. For example, when only the spray unit 10a is selected, the accumulated nozzle number Ne is 1.6, and when the spray unit 10a and the spray unit 10b are selected, the accumulated nozzle number Ne is 25. 6

  When the accumulated nozzle number Ne is smaller than the maximum nozzle number Nc (Ne <Nc in step S220), it indicates that the water supply capacity of the water supply facility 20 has a margin with respect to the amount of water supplied to the spray unit 10. Yes. Therefore, in the case of Ne <Nc, in order to effectively use the water supply capacity of the water supply facility 20, the controller 31 adds the spray to be added to the group so that more spray units 10 are sprayed simultaneously within the water supply capacity range. The unit 10 is selected.

  Prior to such selection, the controller 31 determines whether or not there are other spray units 10 to be selected (step S230). When other spray units 10 to be selected remain (YES in step S230), the spray unit 10 having the highest priority among the remaining spray units 10 to be selected is additionally selected (step S240), the process returns to step S220. On the other hand, when there are no remaining spray units 10 to be selected (NO in step S230), the spray units 10 selected so far are determined as one group (step S250), and this spray unit is selected. End the selection routine.

  When the accumulated nozzle number Ne is greater than the maximum nozzle number Nc (Ne> Nc in step S220), it indicates that the amount of water supplied to the spray unit 10 exceeds the water supply capacity of the water supply facility 20. Yes. Therefore, in the case of Ne> Nc, the controller 31 excludes the spray unit 10 that has already been selected from the group or the number of nozzles so that the amount of supplied water falls within the water supply capacity range of the water supply facility 20. Replace with a few other spray units 10.

  For this reason, the controller 31 excludes the spray unit having the lowest priority from the group among the spray units 10 that have already been selected (step S260). Then, it is determined whether or not there are other spray units 10 to be selected (step S270). When other spray units 10 to be selected remain (YES in step S270), the spray unit 10 having the highest priority is additionally selected from the remaining spray units 10 to be selected (step S270). S280), the process returns to step S220. On the other hand, when there are no remaining spray units 10 to be selected (NO in step S270), the spray units selected so far are determined as one group (step S250), and this spray unit selection is performed. End the routine.

  Further, when the accumulated nozzle number Ne is equal to the maximum nozzle number Nc (Ne = Nc in step S220), the amount of water supplied to the spray unit 10 is equivalent to the water supply capacity of the water supply facility 20. . At this time, since it is not necessary to add a new spray unit 10 to a group or to exclude a spray unit 10 already selected from the group, the spray units 10 selected so far are determined as one group (step S250), this spray unit selection routine is terminated.

  As described above, in the spray unit selection routine, the total number of nozzles Ne is compared with the maximum number of nozzles Nc, so that the spray unit 10 is added to the group and the spray unit 10 is removed from the group while considering the priority order. Sequentially determine exclusions and determine the groups to be sprayed at the same time.

  For example, when the first group to be sprayed for the first time in FIG. 5 is selected, after the spray unit 10a is selected in step S210, the spray units 10b, 10c, 10d, 10e, and 10f are repeated by repeating steps S220 to S240. , 10g are additionally selected. At this time, the cumulative number of nozzles Ne is 60.8, which exceeds the maximum number of nozzles Nc of 57.1, so that Ne> Nc in step S220, and in step S260 to S280, the spray unit 10g is excluded and the spray unit. An additional selection of 10h will be made.

  At this time, the accumulated nozzle number Ne is 50.4, and the spray unit 10i is additionally selected in steps S230 and S240. As a result, the accumulated nozzle number Ne is 74.4, so steps S260 to S280 are performed. Thus, the removal of the spray unit 10i and the additional selection of the spray unit 10j are performed. Subsequently, the total number of nozzles Ne at this time is 52, and the additional selection of the spray unit 10k is performed in steps S230 and S240, and thereby the total number of nozzles Ne is 56.8, so in steps S230 and S240. An additional selection of the spray unit 10l is performed.

  Then, by repeating steps S220 and S260 to S280, the spray unit 10l is excluded and the spray unit 10m is additionally selected, the spray unit 10m is excluded and the spray unit 10n is additionally selected, the spray unit 10n is excluded, and the spray unit 10o is removed. The additional selection, the exclusion of the spray unit 10o, and the additional selection of the spray unit 10p are sequentially performed. Next, after the spray unit 10p is excluded in step S260 via step S220, there are no other selection targets in step S270, so the process proceeds to step S250 to determine the group. In this way, nine spray units of the spray units 10a, 10b, 10c, 10d, 10e, 10f, 10h, 10j, and 10k are selected as the first group to be sprayed for the first time. In addition, the second group and the third group are selected in the same procedure.

  In this way, the controller 31 converts the total number of nozzles Ne in the determined group, that is, the total number of nozzles Nd, which is the total number of nozzles of the spray unit 10 with overlapping spray periods, from the water supply capacity of the water supply facility 20. A group is set so that the maximum number of nozzles Nc is not exceeded and the total number of nozzles Nd is as close as possible to the maximum number of nozzles Nc.

  Next, the second and subsequent sprays of the spray unit 10 processed in step S160 of the spray execution routine will be described. For the second and subsequent sprays, the controller 31 causes the sprays to be performed according to a predetermined spray pattern set for each spray unit 10. At this time, as shown in A or B of FIG. 5, when spraying is started in a certain spray unit, the amount of supplied water may exceed the water supply capacity range of the water supply facility 20. For this reason, the controller 31 performs control such that the amount of supplied water falls within the water supply capacity range of the water supply facility 20 when the spraying is performed for the second and subsequent times in each spray unit 10.

  FIG. 8 is a flowchart of a spray timing control routine executed by the controller 31. This spray timing control routine is executed every time immediately before the spray period of each spray unit 10 is started. When the spray timing control routine is executed, the controller 31 detects a spray unit that is currently sprayed (step S310). Then, the total number of nozzles Nd when spraying is started in the spray unit (hereinafter referred to as the target spray unit) about to start spraying is compared with the maximum number of nozzles Nc (step S320). That is, the total number of nozzles Nd is calculated by adding the number of nozzles of the target spray unit to the total number of nozzles of the spray unit that is currently sprayed, and the total number of nozzles Nd is compared with the maximum number of nozzles Nc. .

  When the total number of nozzles Nd is less than or equal to the maximum number of nozzles Nc (Nd ≦ Nc in step S320), the amount of water supplied is within the water supply capacity range of the water supply facility 20 even when spraying of the target spray unit is started. It shows that there is. Therefore, when Nd ≦ Nc, the controller 31 starts spraying along a predetermined spray pattern of the target spray unit (step S330), and ends the spray timing control routine.

  When the total nozzle number Nd is larger than the maximum nozzle number Nc (Nd> Nc in step S320), when spraying is started in the target spray unit, the amount of water supplied to the spray unit 10 is the water supply capacity of the water supply facility 20. It shows that it exceeds. For this reason, when Nd> Nc, the amount of water to be supplied needs to be within the water supply capacity range of the water supply facility 20. Therefore, the controller 31 determines whether or not there are a plurality of target spray units (step S340). If there is one target spray unit (NO in step S340), the spray period of that target spray unit is delayed until the amount of water supplied falls within the water supply capacity range of water supply facility 20 (step S350). ) The spray timing control routine is terminated.

  On the other hand, when there are a plurality of target spray units (YES in step S340), target spray units that can be sprayed within the water supply capacity range of water supply facility 20 are selected in order of priority (step S360). For example, if there are three target spray units and only two of the higher priority sprays are within the water supply capacity range of the water supply facility 20, the two target spray units are selected. Then, the spraying of the selected target spray unit is started, and the spray period of the other target spray unit is delayed until the supplied water amount falls within the water supply capacity range of the water supply facility 20 (step S370), and this spray End the timing control routine.

  As described above, in the spray timing control routine, the amount of water supplied exceeds the water supply capacity range of the water supply facility 20 by comparing the total nozzle number Nd and the maximum nozzle number Nc before the start of the spray period of the target spray unit. When it is determined that the spraying period of the target spraying unit is delayed, the spraying period of the target spraying unit is delayed.

  For example, in the case where the spray period of the spray unit 10g and the spray unit 10i is started simultaneously in FIG. 5A, the total number of nozzles Nd is 60, so that Nd> Nc in step S320. Further, since there are a plurality of target spray units, YES is determined in step S340, and the process proceeds to step S360. At this time, since the total number of nozzles Nd is 36 if the spraying is performed only by the higher priority spraying unit 10g, the spraying unit 10g is selected in step S360. In step S370, spraying is started only for the spray unit 10g, and spraying of the spray unit 10i is delayed. Spraying of the spray unit 10i is started when the amount of supplied water falls within the water supply capacity range of the water supply facility 20, that is, when the spray period of the spray unit 10b ends.

  Further, in the case where the spraying period of the spraying unit 101 is started in B of FIG. 5, the total number of nozzles Nd is 60, so that Nd> Nc in step S320. At this time, since there is only one target spray unit, NO is determined in step S340, and spraying of the spray unit 10l is delayed in step S350. For this reason, while spraying is delayed, the total number of nozzles Nd is 36, and the amount of water supplied is within the water supply capacity range of the water supply facility 20. Spraying of the spray unit 101 is started when the amount of water supplied falls within the water supply capacity range of the water supply facility 20, that is, when the spraying period of the spray unit 10i ends.

  Thus, when the amount of supplied water exceeds the water supply capacity range of the water supply facility 20, the amount of supplied water is insufficient by temporarily changing and delaying the spray period of the target spray unit. The period is suppressed. In addition, when there are a plurality of target spray units, spraying only a part of the target spray units based on the priority order and delaying the spray period of other target spray units as many as possible The unit is sprayed along a predetermined spray pattern.

According to the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the spray unit 10 that performs intermittent spraying with a predetermined spray pattern according to the operating state of each outdoor unit 40 is connected so as to be communicable with the communication adapter 30. The controller 31 of the communication adapter 30 acquires whether or not each spray unit 10 is in an operating state, and simultaneously determines the spray period of the spray unit 10 in which intermittent spray is performed based on the spray pattern. It sets in order so that it may become in the water supply capacity range of the water supply equipment 20. Then, the controller 31 controls the intermittent spraying of each spray unit 10 based on the set spray period. For this reason, the spray period can be matched between a plurality of spray units that perform intermittent spray simultaneously by the overall control of the controller 31, and the amount of water supplied to each spray unit 10 exceeds the water supply capacity range of the water supply facility 20. Can be prevented.

  (2) In the above embodiment, the controller 31 of the communication adapter 30 orders the spray period of each spray unit 10 so that the amount of water to be supplied falls within the water supply capacity range of the water supply facility 20. It becomes possible to keep the water supply capacity as low as possible. That is, if the water supply equipment 20 such as the water supply pipe 22 is configured so as to be able to supply at least the average amount of water used per hour when all the spray units 10 perform intermittent spraying, by setting the spray period by the controller 31, It is possible to prevent the supply water amount from being insufficient. For this reason, each spray unit 10 can be operated with the minimum necessary water supply equipment 20 without impairing the spray pattern set for each spray unit 10. Accordingly, since it is not necessary to use a large-capacity water supply facility 20 that can cope with a state in which the spray periods of all the spray units 10 overlap, the facilities such as the water supply pipe 22, the pressurizing device 24, and the water supply valve 23 can be downsized. The amount used can be reduced, and the equipment cost and construction cost can be reduced.

  (3) In the above embodiment, each spray unit 10 is provided with the number of nozzles 11 corresponding to the output of the corresponding air conditioner, and the controller 31 of the communication adapter 30 allows the spray units 10 to overlap the spray periods. The spray period of each spray unit 10 is set so that the nozzle number Nd does not exceed the maximum nozzle number Nc converted from the water supply capacity of the water supply facility 20. For this reason, it is possible to replace the spray amount of each spray unit 10 and the water supply capacity of the water supply facility 20 with the number of nozzles so that they can be easily compared. By such comparison, the amount of water supplied to each spray unit 10 is reduced. It can prevent suitably that the water supply capacity range of the water supply equipment 20 is exceeded.

  (4) In the above embodiment, the controller 31 of the communication adapter 30 divides the spray units 10 into the first group, the second group,... The spraying period of each spraying unit 10 is set so that spraying is performed sequentially. For this reason, overall control of intermittent spraying can be facilitated by setting the spraying period for each group. Further, when grouping, the group is set so that the total number of nozzles Nd of the spray units 10 with overlapping spray periods is as close as possible to the maximum number of nozzles Nc, so that the water supply capacity of the water supply facility 20 is utilized to the maximum. It can be in a spraying mode.

  (5) In the above embodiment, the controller 31 of the communication adapter 30 sets the spray period of each spray unit 10 based on the priority spray order set in advance for each spray unit 10. For this reason, for example, when there is an air conditioner in which it is indispensable to ensure the cooling capacity and the reduction of the cooling load is strongly required, the priority spray order of the spray unit 10 provided in the outdoor unit 40 should be set higher. Thus, the spray period can be set so that the heat exchanger 42 is cooled preferentially.

  (6) In the above embodiment, when the controller 31 of the communication adapter 30 determines that the amount of water supplied by the start of spraying of the target spray unit exceeds the water supply capacity range of the water supply facility 20, the spray period of the target spray unit. Is delayed until it is within the water supply capacity range of the water supply equipment. For this reason, by temporarily changing the spray period of the spray pattern of the target spray unit, it is possible to suppress the occurrence of a period in which the amount of supplied water is insufficient. In addition, when there are a plurality of target spray units, spraying only a part of the target spray units based on the priority order and delaying the spray period of other target spray units as many as possible The unit can be sprayed along a predetermined spray pattern.

  (7) In the above embodiment, the controller 31 of the communication adapter 30 controls the intermittent spraying of each spray unit 10 by transmitting and receiving data corresponding to the unique address set for each spray unit 10. It becomes easy to manage the spray pattern of the spray unit 10. In addition, by such address management, the controller 31 can reliably recognize the spray unit 10 provided in the auxiliary cooling device 1 when a spray unit is added or deleted, or is replaced with another one. Can be.

In addition, you may change the said embodiment as follows.
In the above embodiment, the controller 31 of the communication adapter 30 controls intermittent spraying depending on the operating state of each spray unit 10. However, the measuring unit measures the flow rate or flow rate of the water flowing through the water supply facility 20. May be further provided so that the controller 31 feedback-controls the intermittent spraying based on the measurement result by the measuring means. In this case, for example, as shown in FIG. 1, measuring means 25 for measuring the flow rate or flow rate of the circulating water is provided in the water supply pipe 22 of the water supply facility 20 so that the measurement result by the measuring means 25 is input to the controller 31. Can be. In this way, since the spray state from the spray unit 10 and the margin of the water supply capacity of the water supply facility 20 can be grasped from the actual measurement values, the control of the intermittent spraying such as the setting of the spray period is more accurately performed. It can be carried out.

  In the above embodiment, the controller 31 of the communication adapter 30 controls the amount of supplied water to be within the water supply capacity range of the water supply facility 20 by comparing the total nozzle number Nd and the maximum nozzle number Nc. Such control may be performed using a value other than the number of nozzles, such as the flow rate of water in the pipe 14 of the spray unit 10.

  In the above embodiment, the controller 31 of the communication adapter 30 sets the spray period so that spraying is sequentially performed for each group of spray units 10 at the time of the initial spray of the spray unit 10 in which intermittent spray is performed simultaneously. However, the spray period of the spray unit 10 may be individually set without performing grouping.

  In the above embodiment, the controller 31 of the communication adapter 30 sets the spray period of each spray unit 10 based on the priority spray order preset for each spray unit 10, but does not use the priority spray order setting. Alternatively, the spray period may be set.

  In the above embodiment, the controller 31 of the communication adapter 30 and the control board 15 of each spray unit 10 are configured to communicate with each other by serial connection. However, the controller 31 and each control board 15 are connected in parallel. Thus, the communication may be configured.

  In the above embodiment, the controller 31 of the communication adapter 30 controls the intermittent spraying of each spray unit 10 by transmitting and receiving data corresponding to the address set in each spray unit 10. You may make it communicate according to a format. The address setting for each spray unit 10 may be automatically assigned by the controller 31 or may be set in advance when the spray unit 10 is mounted on the outdoor unit 40.

  In the above embodiment, each spray unit 10 sprays water by opening and closing the solenoid valve 16 by the control board 15, but the solenoid valve 16 is configured so that the opening degree can be changed, and the solenoid valve by the control board 15. Spraying may be performed while changing the spray amount by adjusting the opening degree of 16. In this case, by adding adjustment of the opening degree of the electromagnetic valve 16, the intermittent spraying of each spray unit 10 can be made into various spray modes, and the degree of freedom in setting the spray period can be increased.

Schematic which shows the structure with an auxiliary | assistant cooling device and the outdoor unit of an air conditioner. The schematic sectional drawing of the outdoor unit carrying a spraying unit. The block diagram which shows the connection state of a communication adapter and each spraying unit. (A) is a table | surface which shows the one aspect | mode of the spray pattern of each spray unit, (b) is a figure which shows the number of groups of a spray unit, (c) is a table | surface which shows the relationship between piping diameter and the number of nozzles. The time chart which shows the spraying aspect of each spraying unit. The flowchart of a spray execution routine. The flowchart of a spraying unit selection routine. The flowchart of a spray timing control routine.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Auxiliary cooling device, 10 ... Spray unit, 11 ... Nozzle, 12 ... Spray control part, 15 ... Control board, 16 ... Solenoid valve, 20 ... Water supply equipment, 22 ... Water supply piping, 23 ... Water supply valve, 24 ... Pressurization Apparatus, 30 ... communication adapter, 31 ... controller, 40 ... outdoor unit, 42 ... heat exchanger.

Claims (8)

An auxiliary cooling device that intermittently sprays water on each heat exchanger in an outdoor unit of a plurality of air conditioners, and cools the heat exchanger in an auxiliary manner,
A spray unit that is provided in each outdoor unit and performs intermittent spraying with a predetermined spray pattern according to the operation state of each outdoor unit;
Water supply equipment for supplying water to be sprayed to each spray unit;
A communication adapter that is communicably connected to each spray unit;
The communication adapter acquires the operating state of each spray unit, and at the same time the spray period of the spray unit in which intermittent spraying is performed, so that the amount of water supplied based on the spray pattern falls within the water supply capacity range of the water supply facility. orderly and sets, have a control unit for generally controlling the intermittent spraying of the spray unit based on the set spray period,
Each of the spray units has a number of spray nozzles corresponding to the output of the corresponding air conditioner, and a priority spray order indicating a priority order when intermittent spray is performed is preset in each spray unit. Has been
The control means divides spray units in which intermittent spray is simultaneously performed based on the priority spray order set in each spray unit, and performs spraying sequentially for each group of spray units. Set the spray period of the spray unit,
Furthermore, in the selection of the spray unit determined as one group, the control means selects the spray unit with the higher priority spray order among the spray units to be selected, and selects the selected spray unit. When the amount of water to be supplied exceeds the water supply capacity of the water supply facility, the spray units that have been excluded are excluded from the group by subtracting the spray units having the lower priority spray order from the group among the spray units already selected. An auxiliary cooling device characterized by additionally selecting another spraying unit having a smaller number of nozzles as compared with the above. An auxiliary cooling device that intermittently sprays water on each heat exchanger in an outdoor unit of a plurality of air conditioners, and cools the heat exchanger in an auxiliary manner,
A spray unit that is provided in each outdoor unit and performs intermittent spraying with a predetermined spray pattern according to the operation state of each outdoor unit;
Water supply equipment for supplying water to be sprayed to each spray unit;
A communication adapter that is communicably connected to each spray unit;
The communication adapter acquires the operating state of each spray unit, and at the same time the spray period of the spray unit in which intermittent spraying is performed, so that the amount of water supplied based on the spray pattern falls within the water supply capacity range of the water supply facility. And control means for comprehensively controlling the intermittent spraying of each spray unit based on the set spray period,
Each spray unit has a number of spray nozzles corresponding to the output of the corresponding air conditioner,
The said control means can spray simultaneously the total nozzle number which totaled the number of the nozzles of the spray unit with which a spray period overlaps when spraying is started in the object spray unit converted from the water supply capability of the said water supply equipment. When the number of nozzles is greater than the maximum number , the auxiliary cooling device is characterized in that the spray period of the target spray unit is delayed until the amount of supplied water falls within the water supply capacity range of the water supply facility . The auxiliary cooling device according to claim 2 , wherein
In each of the spray units, a priority spray order indicating a priority order when intermittent spray is performed is preset,
The control means divides spray units in which intermittent spray is simultaneously performed based on the priority spray order set in each spray unit, and performs spraying sequentially for each group of spray units. Set the spray period of the spray unit,
Furthermore, in the selection of the spray unit determined as one group, the control means selects the spray unit with the higher priority spray order among the spray units to be selected, and selects the selected spray unit. When the amount of water to be supplied exceeds the water supply capacity of the water supply facility, the spray units that have been excluded are excluded from the group by subtracting the spray units having the lower priority spray order from the group among the spray units already selected. An auxiliary cooling device characterized by additionally selecting another spraying unit having a smaller number of nozzles as compared with the above. In the auxiliary cooling device according to any one of claims 1 to 3,
Further comprising a measuring means for measuring the flow rate or flow rate of the water flowing through the water supply facility,
The auxiliary cooling device , wherein the control means feedback-controls intermittent spray of each spray unit based on a measurement result by the measurement means . In the auxiliary cooling device according to any one of claims 1 to 4,
The water supply equipment is configured such that water is supplied to each spray unit through a water supply pipe branched on the downstream side,
The pipe diameter of the water supply pipe is selected based on the number of spray nozzles which is the number of nozzles sprayed at the same time when it is assumed that spraying is performed for each group in which the number of nozzles is equally divided. Cooling system. The auxiliary cooling device according to claim 1 or 3 ,
In the selection of spray units determined as one group, the control means sprays simultaneously the total number of nozzles, which is the total number of nozzles of the selected spray units, converted from the water supply capacity of the water supply facility. When the number of nozzles is larger than the maximum number of nozzles that can be selected, the spray units with the lower priority spray order are excluded from the group among the spray units already selected, and the number of nozzles is smaller than the excluded spray units. An auxiliary cooling device characterized by additionally selecting a spray unit . The auxiliary cooling device according to claim 2 , wherein
In each of the spray units, a priority spray order indicating a priority order when intermittent spray is performed is preset,
When there are a plurality of target spray units, the control means selects target spray units that can be sprayed within the water supply capacity range of the water supply equipment in the order of the priority spray order, and the selected target spray units. An auxiliary cooling device that starts spraying and delays the spraying period of another target spraying unit until the amount of supplied water falls within the water supply capacity range of the water supply facility .   The auxiliary cooling device according to claim 5, wherein
  As for the number of spray nozzles, the number of spray nozzles of the spray unit is set so that the total number of nozzles is equal to the total number of nozzles of the spray unit so that the spray periods of the spray units do not overlap during one cycle of intermittent spray in the spray unit. Divided by the smallest number of groups out of the number of groups representing whether or not
  An auxiliary cooling device characterized by that.

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