JP6690067B1 - Sprinkler, air conditioner, and sprinkling method - Google Patents

Abstract

In a water sprinkler that sprinkles water on a heat exchanger of an outdoor unit included in an air conditioner, the water sprinkling unit sprays first water on the heat exchanger and first water on the heat exchanger. Carries out a second spray of spraying a second water of different water quality. The control unit sets the first spraying to intermittent spraying in which the start and stop of spraying are alternately repeated, performs the intermittent spraying a plurality of times with the rest period interposed, and controls the watering so as to perform the second spraying in the rest period.

Description

The present invention, sprinkler devices for performing watering heat exchanger of an air conditioner, an air conditioner having the sprinkler system, to a及beauty watering method.

  In an outdoor unit of an air conditioner installed in a building, etc., when the outside air temperature is high, in order to improve the heat exchange efficiency of the heat exchanger and improve energy saving, water supply is sprayed on the heat exchanger for a certain period. May cool the heat exchanger. The tap water that is widely used is used for water supply. In areas where tap water is not widely used, well water may be used as water supply. In addition, industrial water, which is cheaper than tap water, may be used as water supply in factories and the like.

  The feed water contains scale components and corrosive components. Examples of the scale component include calcium ion, magnesium ion, carbonate ion, sulfate ion, silica ion and the like. Examples of the corrosive component include chloride ion, copper ion, iron ion, copper compound, iron compound and sulfide.

  Therefore, when the feed water evaporates due to the heat exchange, the scale component and the corrosive component in the feed water may be deposited or deposited on the radiation fins of the heat exchanger in a concentrated state. In such a case, the radiating fins, the refrigerant pipes, etc. may be covered or corroded by the scale, and the heat exchange efficiency may be reduced or the heat exchanger may be damaged.

  On the other hand, in the conventional water-sprinkling system of the air-cooling type heat source device, the cleaning process is performed after the cooling process for spraying the cooling water is completed. In the cleaning step, cleaning water having a higher quality than the supply water for cooling is sprayed to remove contaminants such as impurities adhering to or accumulating on the heat exchanger (for example, refer to Patent Document 1).

JP, 2016-142436, A

  In the conventional water sprinkling system as in Patent Document 1, since the cooling water supply is always continuously sprinkled, the amount of cooling water supply used increases and the cost increases.

The present invention has been made to solve the above problems, water spray apparatus can also conserve water while spraying water for cooling, air conditioner, to obtain the及beauty watering method To aim.

A water sprinkling apparatus according to the present invention is a water sprinkling apparatus that sprinkles water on a heat exchanger of an outdoor unit included in an air conditioner, and is a first sprinkler for sprinkling first water on a heat exchanger and a first sprinkler for a heat exchanger. 1 Water is a water sprinkling unit that sprays a second water with a different water quality, and a first spray is an intermittent spray in which the start and stop of spraying are repeated alternately, and an intermittent spray is performed with a pause period. Water is sprayed so that the second spraying is performed during the pause period between the first intermittent spraying executed first and the second intermittent spraying executed after the first intermittent spraying among the multiple intermittently sprayed. And a control unit for controlling the.
Further, engagement Ru watering method to the present invention, the start of a water spray method of performing water spray to the heat exchanger of the outdoor unit of an air conditioner has, spraying a first spray of the first water to heat exchanger Intermittent spraying that alternates between stop and stop is performed , intermittent spraying is executed multiple times with a pause period, and intermittent spraying is executed first of the intermittent sprays executed multiple times and executed after intermittent spraying. a rest period interposed between the intermittent spraying after being, the first water performs a second spray of fabric diffusing the second water quality is different to the heat exchanger.

  According to the present invention, it is possible to save water while spraying cooling water.

It is a block diagram which shows typically the air conditioner by Embodiment 1 of this invention. It is a block diagram which shows the water sprinkler of FIG. 1 typically. It is a timing chart which shows an example of the spray timing of the 1st water and the 2nd water from the sprinkling part of FIG. 3 is a flowchart showing an example of the operation of the control unit in FIG. 2. 5 is a configuration diagram showing a first example of a processing circuit that realizes each function of the control unit according to the first embodiment. FIG. 6 is a configuration diagram showing a second example of a processing circuit that realizes each function of the control unit according to the first embodiment. FIG.

Embodiments for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1.
<Structure of air conditioner>
1 is a block diagram schematically showing an air conditioner according to Embodiment 1 of the present invention. In FIG. 1, the air conditioner 1 has an indoor unit 2, an outdoor unit 3, and a sprinkler 4.

  The indoor unit 2 is installed in the room and adjusts the temperature of the air in the room. The outdoor unit 3 is installed outdoors and has a heat exchanger 5. The heat exchanger 5 exchanges heat between the outdoor air and the refrigerant flowing inside the heat exchanger 5. The water sprinkler 4 sprays the water supply to the heat exchanger 5 to improve the heat exchange efficiency of the heat exchanger 5.

<Structure of sprinkler>
FIG. 2 is a block diagram schematically showing the sprinkler device 4 of FIG. The water sprinkling device 4 includes a water sprinkling unit 11, a first water supply unit 12, a second water supply unit 13, a first adjusting unit 14, a second adjusting unit 15, and a control unit 16.

  The water sprinkling unit 11 sprinkles the water supply on the heat exchanger 5. Water supply includes first water and second water. The first water is cooling water that cools the heat exchanger 5. The second water is cleaning water for cleaning the heat exchanger 5.

  The first water supply unit 12 supplies the first water to the water sprinkling unit 11. The second water supply section 13 supplies the second water to the sprinkling section 11.

  The quality of the second water is different from that of the first water. Specifically, the water quality of the second water is higher than that of the first water. That is, the concentration of impurities contained in the second water is lower than the concentration of impurities contained in the first water.

  For example, tap water that is widely used is used as the first water. Also, in areas where tap water is not widely used, well water, for example, may be used as the first water. Further, in a factory or the like, industrial water that is cheaper than tap water may be used as the first water. Such first water contains impurities such as scale components and corrosive components.

  Examples of the scale component include calcium ion, magnesium ion, carbonate ion, sulfate ion, silica ion and the like. Examples of the corrosive component include chloride ion, copper ion, iron ion, copper compound, iron compound, sulfide and the like.

  On the other hand, as the second water, water obtained by passing tap water, well water, industrial water or the like through an ion exchange resin, a water softener, or a pure water producing device is used. Scale components and corrosive components are removed from the second water.

  The first adjustment unit 14 adjusts the supply of the first water from the first water supply unit 12 to the sprinkler unit 11. The second adjustment unit 15 adjusts the supply of the second water from the second water supply unit 13 to the sprinkler unit 11.

  The control unit 16 controls the first adjusting unit 14 and the second adjusting unit 15. Thereby, the control unit 16 controls the supply of the first water from the first water supply unit 12 to the water sprinkling unit 11 and the supply of the second water from the second water supply unit 13 to the water sprinkling unit 11.

  The control unit 16 performs the intermittent spraying of the first water a plurality of times, and controls the supply of the first water to the sprinkling unit 11 so that there is a pause period during which the intermittent spraying is paused between each intermittent spraying. Intermittent spraying is a spraying method in which spraying and stopping of the first water are alternately repeated.

  The control unit 16 controls the supply of the second water to the water sprinkling unit 11 so that the second water is sprayed during the pause period of the intermittent spraying of the first water. The application of the second water is performed at least once during the pause period of the intermittent application of the first water. In addition, the second water may be sprayed once or continuously.

  The water sprinkling unit 11 performs, as water sprinkling, a first spray for spraying the first water on the heat exchanger 5 and a second spray for spraying the second water on the heat exchanger 5. The control unit 16 sets the first spraying as intermittent spraying in which the start and stop of spraying are alternately repeated, executes the intermittent spraying a plurality of times with the rest period interposed, and controls the watering so as to perform the second spraying in the rest period. .

  The control unit 16 has a first timer 17 and a second timer 18.

  FIG. 3 is a timing chart showing an example of the timing of spraying the first water and the second water from the sprinkler unit 11 of FIG. In FIG. 3, the spraying timing of the first water is shown by a solid line, and the spraying timing of the second water is shown by a broken line. Further, the first water and the second water are sprayed at the ON time of FIG. 3 and stopped at the OFF time.

  T1 indicates the implementation period of the intermittent spraying of the first water. T2 indicates a pause period of intermittent spraying of the first water. t1 has shown the spraying time of the 1st water once in intermittent spraying. t2 has shown the stoppage time of the 1st water once in intermittent spraying.

  The control unit 16 controls the supply of the first water to the water sprinkling unit 11 such that the first water spraying time t1 in the intermittent spraying is shorter than the stop time t2. For example, the stop time t2 of the first water in the intermittent spraying, that is, the spraying interval is set to 1 minute to 5 minutes, and the spraying time t1 is set to a time shorter than the stop time.

  The stop time t2 is preferably set so that the next first water is sprayed before the first water sprayed on the heat exchanger 5 is evaporated.

  The control unit 16 controls the supply of the first water and the second water to the water spraying unit 11 so that the first water is intermittently sprayed, that is, the first spray and the second spray are alternately performed.

  When intermittently spraying the second water, the stop time of the second water in the intermittent spray is set to 1 minute to 5 minutes, and the spray time is set to a time shorter than the stop time. Further, it is preferable that the stop time of the second water spray is set so that the next second water is sprayed before the second water sprayed in the heat exchanger 5 is evaporated.

  The supply time of the second water is preferably 1/100 to 1/2 of the total supply time of the first water. Further, the supply amount of the second water is preferably 1/100 to 1/2 of the total supply amount of the first water.

  Hereinafter, a more detailed structure of the sprinkler 4 will be described.

<Structure of sprinkler>
The sprinkling unit 11 has a nozzle, a nozzle pipe, and a fixing jig. Illustration of the nozzles, nozzle pipes, and fixing jigs is omitted. The nozzle sprinkles the first water and the second water on the heat exchanger 5. The nozzle pipe supplies the first water and the second water to the nozzle. The fixing jig fixes the nozzle and the nozzle pipe to the outdoor unit 3.

  The installation position of the nozzles, the number of nozzles, and the spraying shape of the water supply are not particularly limited as long as the heat exchanger 5 can be sprayed. However, the installation position of the nozzle is preferably a side surface or an upper surface on the intake side of the heat exchanger 5 so that the nozzle can be installed in a small space, and more preferably, a front surface on the intake side that can be sprayed over a wider range.

  The number of nozzles may be one for each outdoor unit 3 as long as water can be sprayed on the heat exchanger 5. However, by using two or more nozzles according to the size and shape of the heat exchanger 5, the spraying area can be increased and the cooling performance can be further enhanced.

  When the water is sprayed from the front side of the heat exchanger 5 on the intake side, the shape of the water supply is preferably a full cone or a full square pyramid that can be sprayed over a wide range at once. Further, when the water supply is sprayed from the intake side surface or the upper surface, the spray shape is preferably a fan shape so that it can be sprayed in a wider range. By making the spray shape fan-shaped, it is possible to drain the water supply from the side surface or the upper surface to the lower portion of the heat exchanger 5.

  When water is sprayed only from the upper surface of the heat exchanger 5 on the intake side, a water pipe having a plurality of holes may be used instead of the nozzle, and a cooling effect can be obtained.

<Structure of the first water supply section>
The first water supply unit 12 is connected to the water sprinkling unit 11 via a first pipe 21 and a common pipe 23. In addition, the first water supply unit 12 supplies the first water having a lower water quality than the second water to the water sprinkling unit 11. A raw water supply pipe is connected to the first water supply unit 12. Examples of the raw water supply pipe include a water pipe, a well water pipe, and an industrial water pipe.

  The raw water supply pipe is preferably connected to the first water supply unit 12 via the first opening / closing valve. It is preferable that the first opening / closing valve is capable of timer control so as to automatically open and close in accordance with the implementation period T1 of the intermittent spraying of the first water.

  The implementation period T1 of the intermittent spraying of the first water is the time from when the measured temperature is equal to or higher than the preset first preset temperature to when it is equal to or lower than the preset second preset temperature as a temperature equal to or lower than the preset first temperature. Can be The second set temperature may be the same as the first set temperature, and the implementation period T1 may be ended when the measured temperature becomes lower than the second set temperature.

  The measurement temperature may be the outside air temperature or the temperature of the refrigerant circulating in the heat exchanger 5. The outside air temperature or the temperature of the refrigerant can be measured by providing the outdoor unit 3 with a temperature sensor. The signal from the temperature sensor is transmitted to the control unit 16. When the measured temperature is the temperature of the refrigerant, the temperature at which the refrigerant condenses may be set as the first set temperature.

  In the implementation period T1 of the intermittent spraying of the first water, the power consumption of the outdoor unit 3 becomes equal to or higher than the preset first power consumption, and then becomes equal to or lower than the second power consumption preset as the power equal to or lower than the first power consumption. It may be time to become. The second power consumption may be the same as the first power consumption, and the implementation period T1 may be ended when the power consumption becomes less than the second power consumption.

  If the water pressure in the raw water supply pipe is the usual 0.1 MPa to 0.3 MPa, the feed water can be sent to the sprinkling section 11 as it is. However, when the water pressure of the raw water supply pipe is low and the first water cannot be sufficiently sprayed from the water sprinkling section 11 to the heat exchanger 5, it is necessary to add a liquid sending pump.

  When stably supplying the first water to a large number of heat exchangers 5 at a constant water pressure, the first water supply unit 12 stores the water supplied from the raw water supply pipe and the water supply unit that sends the stored water supply to the sprinkler unit 11. It is preferably configured with a liquid pump.

<Configuration of second water supply section>
The second water supply unit 13 is connected to the water sprinkling unit 11 via the second pipe 22 and the common pipe 23. In addition, the second water supply unit 13 supplies the second water having higher water quality than the first water to the sprinkling unit 11. The second water supply unit 13 has an ion exchange resin, a water softener, or a pure water production device.

  A raw water supply pipe is connected to the second water supply unit 13 via a second opening / closing valve. It is preferable that the second opening / closing valve is capable of timer control so as to automatically open and close according to the spraying time t3 of the second water.

  The second water spraying time t3 is shorter than the pause period T2 of the intermittent spraying of the first water. The second water is sprayed after the implementation period T1 of the intermittent spraying of the first water has elapsed.

  If the water pressure in the raw water supply pipe is the usual 0.1 MPa to 0.3 MPa, the feed water can be sent to the sprinkling section 11 as it is. However, when the water pressure of the raw water supply pipe is low and the second water cannot be sufficiently sprayed from the water sprinkling section 11 to the heat exchanger 5, it is necessary to add a liquid sending pump.

  When stably supplying the second water to many heat exchangers 5 at a constant water pressure, the second water supply unit 13 is a tank for storing the water supplied through the ion exchange resin, the water softener, or the pure water producing device. It is preferable that the liquid supply pump is configured to feed the stored water supply to the water sprinkling unit.

<Structures of the first adjusting unit, the second adjusting unit, and the control unit>
The first adjusting unit 14 is provided in the first pipe 21. The second adjusting unit 15 is provided in the second pipe 22. Electromagnetic valves can be used as the first adjusting unit 14 and the second adjusting unit 15, respectively.

  The control unit 16 sends an electric signal to the solenoid valve of the first adjusting unit 14 when the first timer 17 is in the ON state. As a result, the solenoid valve of the first adjusting unit 14 opens. In addition, the control unit 16 cuts off power transmission to the first adjustment unit 14 when the first timer 17 is in the off state. As a result, the solenoid valve of the first adjusting unit 14 is closed.

  The solenoid valve of the first adjusting unit 14 can be repeatedly opened and closed at least twice or more during the implementation period T1 of the intermittent spraying of the first water.

  The control unit 16 sends an electric signal to the electromagnetic valve of the second adjusting unit 15 when the second timer 18 is in the ON state. As a result, the solenoid valve of the second adjusting unit 15 opens. Further, the control unit 16 cuts off power transmission to the second adjustment unit 15 when the second timer 18 is in the off state. As a result, the solenoid valve of the second adjusting unit 15 is closed.

  The solenoid valve of the second adjusting unit 15 can be repeatedly opened and closed at least twice or more during the pause period T2 of the intermittent spraying of the first water.

  It is preferable that the first adjusting unit 14, the second adjusting unit 15, and the control unit 16 are collectively arranged at one place. As a result, the installation space can be reduced, and one control unit 16 can operate the first adjustment unit 14 and the second adjustment unit 15.

  For example, when the implementation period T1 of the intermittent spraying of the first water is set based on the measured temperature, when the temperature sensor detects that the measured temperature is equal to or higher than the first set temperature, the control unit 16 causes the first The timer 17 is turned on. As a result, the first water is supplied from the first water supply unit 12 to the water sprinkling unit 11, and the first water is sprinkled from the water sprinkling unit 11 to the heat exchanger 5.

  The control unit 16 opens and closes the electromagnetic valve of the first adjusting unit 14 and keeps the electromagnetic valve of the second adjusting unit 15 closed at a set cycle during the implementation period T1.

  Depending on the weather on that day, for example, the measured temperature may become equal to or higher than the first set temperature and then may not be equal to or lower than the second set temperature until the evening. In this case, intermittent spraying of the first water will be performed throughout the day. That is, the implementation period T1 of the intermittent spraying is from the measured temperature becomes equal to or higher than the first set temperature to the evening.

  After that, when the measured temperature becomes equal to or lower than the second set temperature in the evening, the power supply for operating the first timer 17 is turned off. As a result, the spraying of the first water is stopped, and the pause period T2 for intermittent spraying is entered.

  In the pause period T2, the power supply for operating the second timer 18 is turned on. Then, the second water is sprayed for the spraying time t3. When the spraying time t3 has elapsed, the power supply for operating the second timer 18 is turned off. As a result, the sprinkling of the second water is stopped, and the rest period T2 is continued until the next implementation period T1 is entered.

  During the daytime, the measured temperature may become higher than the first set temperature or may become lower than the second set temperature many times. In this case, intermittent spraying of the first water is carried out in the order of intermittent spraying of the first water of the first time, spraying of the second water of the first time, intermittent spraying of the first water of the second time, spraying of the second water of the second time. And the spraying of the second water are alternately repeated.

<Operation of control unit>
FIG. 4 is a flowchart showing an example of the operation of the control unit 16 in FIG. In step S1, the control unit 16 monitors whether or not the measured temperature is equal to or higher than the first set temperature, based on the signal from the temperature sensor. If the measured temperature is lower than the first set temperature, the control unit 16 does not spray the first water and the second water, and continues to monitor the measured temperature.

  When the measured temperature becomes equal to or higher than the first set temperature, the control unit 16 enters the implementation period T1 of the intermittent spraying of the first water in step S2, and sprays the first water in step S3. After that, the control unit 16 waits for the first water spraying time t1 to elapse in step S4.

  When the spraying time t1 has elapsed, the control unit 16 stops spraying the first water in step S5. After that, the control unit 16 waits for the stop time t2 of the first water to elapse in step S6.

  When the stop time t2 has elapsed, the control unit 16 confirms in step S7 whether the measured temperature has become equal to or lower than the second set temperature. When the measured temperature is higher than the second set temperature, the control unit 16 returns to the process of step S3 and continues the intermittent spraying of the first water. The control unit 16 repeats the processing from step S3 to step S7 until the measured temperature becomes equal to or lower than the second set temperature.

  When the measured temperature becomes equal to or lower than the second set temperature, the control unit 16 enters the pause period T2 of the intermittent spraying of the first water in step S8. During the rest period T2, the solenoid valve of the first adjusting unit 14 remains closed, and the spraying of the first water remains stopped.

  The process of step S7 may be performed at any timing during the intermittent spraying implementation period T1, or may be performed multiple times. When the measured temperature becomes equal to or lower than the second preset temperature during the spraying of the first water, the control unit 16 stops the spraying of the first water and then enters the suspension period T2.

  When entering the pause period T2, the control unit 16 sprays the second water in step S9. The application of the second water may be started immediately after entering the rest period T2, or may be started after a set time has elapsed after entering the rest period T2.

  In step S10, the control unit 16 waits for the second water spraying time t3 to elapse. When the spraying time t3 has elapsed, the control unit 16 stops spraying the second water in step S11.

  The second water is sprayed only once, but the second water may be sprayed intermittently during the rest period T2.

  When the spraying of the second water is stopped, the control unit 16 returns to the process of step S1 and continues the pause period T2.

  The second water may be sprinkled even after the operation of the outdoor unit for one day is completed.

  As described above, in the water sprinkling method for the air conditioner 1 of Embodiment 1, the first water is intermittently sprinkled on the heat exchanger 5 a plurality of times, and the second water is sprinkled on the heat exchanger 5 first. 1 Do it during the suspension period of intermittent spraying of water. Further, intermittent spraying of the first water and spraying of the second water are performed alternately.

  In the water sprinkler 4 and the water sprinkling method of the air conditioner 1 as described above, the first water is intermittently sprayed to the heat exchanger 5, and thus the power consumption of the heat exchanger 5 is reduced and the heat exchanger 5 is reduced. It is possible to save the amount of water by reducing the amount of the first water that is not used for heat exchange with 5, and is drained. That is, it is possible to save water while spraying cooling water. As a result, it is possible to improve energy efficiency and save water bills.

  Since the second water, which is the wash water, is applied to the heat exchanger 5 during the suspension period of the intermittent application of the first water, the concentration of scale components and corrosive components contained in the first water is suppressed, It is possible to suppress a decrease in heat exchange efficiency of the heat exchanger 5 and a failure.

  As described above, according to the water sprinkler 4 and the water sprinkling method of the first embodiment, it is possible to save water while maintaining the durability of the heat exchanger 5.

  Since the control unit 16 controls the supply of the first water by the first water supply unit 12 and the supply of the second water by the second water supply unit 13, the structure of the water sprinkling unit 11 can be simplified.

  Since the intermittent spraying of the first water and the spraying of the second water are alternately performed, the durability of the heat exchanger 5 can be more reliably maintained.

  Since the spraying time of the first water in the intermittent spraying is set to be less than the stop time of the first water, it is possible to further reduce the amount of the first water discharged without being used for heat exchange with the heat exchanger 5.

  Since the concentration of impurities contained in the second water is lower than the concentration of impurities contained in the first water, it is possible to more reliably maintain the durability of the heat exchanger 5.

  It should be noted that the second water does not necessarily have to be sprayed during each pause period T2.

  The difference between the water quality of the first water and the water quality of the second water is not limited to the concentration of impurities.

  In the above example, the intermittent spraying of the first water is started or stopped based on the measured temperature, but the implementation period T1 of the intermittent spraying may be started and ended at preset times.

  Each function of the control unit 16 of the first embodiment is realized by a processing circuit. FIG. 5 is a configuration diagram showing a first example of a processing circuit that realizes each function of the control unit 16 according to the first embodiment. The processing circuit 100 of the first example is dedicated hardware.

  The processing circuit 100 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. . Further, each function of the control unit 16 may be realized by an individual processing circuit 100, or each function may be collectively realized by the processing circuit 100.

  FIG. 6 is a configuration diagram showing a second example of a processing circuit that realizes each function of the control unit 16 according to the first embodiment. The processing circuit 200 of the second example includes a processor 201 and a memory 202.

  In the processing circuit 200, each function of the control unit 16 is realized by software, firmware, or a combination of software and firmware. The software and firmware are described as programs and stored in the memory 202. The processor 201 realizes each function by reading and executing a program stored in the memory 202.

  It can be said that the program stored in the memory 202 causes a computer to execute the procedure or method of each unit described above. Here, the memory 202 is, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Memory, etc.), an EEPROM (Electrically readable memory, EEPROM). Or a volatile semiconductor memory. A magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, etc. also correspond to the memory 202.

  Note that the functions of the above-described units may be partially implemented by dedicated hardware and partially implemented by software or firmware.

  As described above, the processing circuit can realize the functions of the above-described units by hardware, software, firmware, or a combination thereof.

  1 air conditioner, 3 outdoor unit, 4 sprinkler, 5 heat exchanger, 11 sprinkler, 12 1st water supply part, 13 2nd water supply part, 16 control part.

Claims (9)

In the water sprinkler that sprinkles water on the heat exchanger of the outdoor unit of the air conditioner,
A first sprinkler for sprinkling the first water on the heat exchanger, and a second sprinkler for performing second sprinkling on the heat exchanger with second water having a water quality different from that of the first water as the sprinkle. ,
The first spraying is intermittent spraying in which the start and stop of spraying are alternately repeated, the intermittent spraying is executed a plurality of times with a pause period, and the first intermittent spraying is executed first of the intermittent spraying. A controller that controls the watering so as to perform the second spraying during the pause period sandwiched between the first intermittent spraying and the second intermittent spraying performed after the first intermittent spraying;
A temperature sensor provided in the outdoor unit,
The concentration of impurities contained in the second water is lower than the concentration of impurities contained in the first water,
The control unit is
When the measured temperature measured by the temperature sensor is higher than the set temperature when the stop of the tip intermittent spraying is performed after the spraying time has elapsed by performing the start of the tip intermittent spraying, the tip intermittent spraying is continued,
A sprinkler which, when the measured temperature is equal to or lower than the preset temperature, terminates the first intermittent spraying and enters the rest period, and performs the second spraying during the rest period. A first water supply unit for supplying the first water to the water sprinkling unit,
Wherein the control unit according to claim 1 Symbol placing the sprinkler system for controlling the supply of the first water by the first water supply unit. A second water supply unit for supplying the second water to the water sprinkling unit,
Wherein, watering device according to claim 1 or claim 2 for controlling the supply of the second water by the second water supply unit. The water sprinkler according to any one of claims 1 to 3 , wherein the control unit controls the water sprinkling so as to alternately perform the intermittent spraying and the second spraying. The water spray device according to any one of claims 1 to 4 , wherein the control unit controls the water spray so that a spraying time of the first water in the intermittent spraying is less than a stop time. An air conditioner comprising the sprinkler device according to any one of claims 1 to 5 . In the watering method of watering the heat exchanger of the outdoor unit of the air conditioner,
The first spraying of the first water to the heat exchanger is intermittent spraying in which the start and stop of spraying are alternately repeated, and the intermittent spraying is performed a plurality of times with a rest period interposed,
The water quality is different from that of the first water during the rest period between the first intermittent spraying executed first and the second intermittent spraying executed after the first intermittent spraying out of the intermittent spraying executed a plurality of times. Performing a second spray of spraying a second water to the heat exchanger,
The concentration of impurities contained in the second water is lower than the concentration of impurities contained in the first water,
Measuring the temperature of the outdoor unit with a temperature sensor provided in the outdoor unit,
When the measured temperature measured by the temperature sensor is higher than the set temperature when the stop of the first intermittent spraying is executed after the spraying time has elapsed after the start of the first intermittent spraying, the first intermittent spraying is continued. Then
A sprinkling method in which, when the measured temperature is equal to or lower than the preset temperature, the first intermittent spraying is ended to enter the pause period, and the second spraying is performed during the pause period. 7. Symbol mounting method of watering performing the spraying of the second water and the intermittent spraying of the first water alternately. The sprinkling method according to claim 7 or 8 , wherein the spraying time of the first water in the intermittent spraying is shorter than the stop time of the first water.

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