JP6431453B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system including an indirect outside air cooling device.

  Conventionally, it has been proposed to use an indirect outside air cooling device for cooling a building such as a data center that generates a large amount of indoor sensible heat (for example, see Patent Document 1). In the indirect outside air cooling device, the indoor air is cooled by the refrigerant cooled by the outside air.

JP 2002-61911 A

  However, in the conventional indirect outside air cooling device, the outside air heat-exchanged with the refrigerant is simply discharged outside and not used particularly.

  The present invention has been made in view of the above, and an object of the present invention is to provide an air conditioning system that can efficiently use outside air heat-exchanged with a refrigerant in an indirect outside air cooling device.

  In order to achieve the above object, an air conditioning system according to the present invention has an outdoor unit that cools a refrigerant by heat exchange with outside air, and an indirect outdoor air cooling device that performs cooling with the refrigerant, and the outdoor unit includes An outdoor unit room that is provided and provided with an intake port for taking in outside air, and an outside air utilization system that enables use of the outside air after heat exchange in the outdoor unit room.

  In the air conditioning system according to the present invention, the warmed outside air after heat exchange is used by the outside air utilization system, for example, for heating. The place where the cooling by the indirect outside air cooling device is performed is usually a place where the temperature of the outside air is low and cold, so that heating may be required, and the outside air warmed can be used. That is, according to the air conditioning system of the present invention, the outside air after heat exchange can be used efficiently.

Outside air utilization system, viewed including the outside air utilization chamber connected from the outdoor unit chamber and heat exchanger after outside air can be introduced such as the outdoor unit chamber, the outdoor unit chamber and the outside air utilization chamber are adjacent, the exterior An opening serving as an inlet for outside air after heat exchange from the outdoor unit room to the outside air using room is provided on a side wall separating the machine room and the outside air using room. In this configuration, the warmed outside air after the heat exchange is introduced into the outside air utilization chamber and used for, for example, heating. As described above, there may be a room where heating is required in a place where the indirect outside air cooling apparatus performs cooling, and the heated outside air can be used. That is, according to this configuration, the outside air after heat exchange can be used efficiently.

  An outdoor unit of a heating device or a heat pump type water heater is provided in the outside air utilization room. According to this structure, a heating apparatus or a water heater can be operated efficiently.

  Or, in the outdoor unit room, it is provided between a discharge port for discharging outside air introduced into the outdoor unit room to the outside, and between the discharge port and the outdoor unit, and until the outside air after heat exchange is discharged to the outside. And a current shielding member that lengthens the length. As in this configuration, the outdoor unit room is usually provided with a discharge port. However, according to this configuration, it is possible to lengthen the path until the outside air after heat exchange is discharged to the outside. It is possible to prevent the outside air after heat exchange introduced into the air from being cooled by outside cold air. Thereby, the efficient utilization of the outside air after heat exchange can be promoted.

Or the intake is provided in the lower part of the outdoor unit in the lower surface of an outdoor unit room . According to this configuration, the intake port can be prevented from being blocked by snow accumulation or the like. Thereby, it can prevent that external air utilization is inhibited.

Alternatively, the indirect outdoor air cooling device has a plurality of outdoor units, and the air conditioning system detects the operating state of the indirect outdoor air cooling device, and determines whether the outdoor operating unit is in accordance with the detected operating state and the position where the outdoor unit is provided. further Ru and control means for controlling the operation of the machine. The outdoor unit room is provided with an opening for making use of the outside air after heat exchange, and the control means is configured according to the relationship between the position of the outdoor unit and the position of the opening. Control the operation of the outdoor unit. According to this configuration, when using an indirect outside air cooling apparatus provided with a plurality of outdoor units, the indirect outside air cooling apparatus can be operated efficiently and the outside air after heat exchange can be efficiently used. Can do.

  In the present invention, the warmed outside air after heat exchange is used, for example, for heating. That is, according to the present invention, the outside air after heat exchange can be used efficiently.

It is an elevation sectional view showing a part of an air-conditioning system concerning an embodiment of the present invention. It is a top view which shows the air conditioning system which concerns on embodiment of this invention. It is a top view which shows the air conditioning system which concerns on the modification of embodiment of this invention.

  Hereinafter, an embodiment of an air-conditioning system according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the dimensional ratios in the drawings do not necessarily match those described.

  FIG. 1 is an elevational sectional view showing a part of an air conditioning system 1 according to the present embodiment. FIG. 2 is a plan view showing the air conditioning system 1 according to the present embodiment. As shown in FIGS. 1 and 2, the air conditioning system 1 is a system provided in a building 2. In the building 2, a plurality of rooms (rooms) 21 to 25 are provided. The air conditioning system 1 also includes an indirect outside air cooling device 3 that cools at least one of the rooms of the building 2. In order to cool by the indirect outside air cooling device 3, the building 2 is built in a place or a region where the outside air can be cooled. The indirect outside air cooling of the indirect outside air cooling device 3 may be performed only in the winter season when the outside air temperature is sufficiently low.

  In the present embodiment, the building 2 is a data center. The room cooled by the indirect outside air cooling device 3 is a server room 21 in which a server that is a computer managed in the data center is installed. The building 2 may be composed of a plurality of layers. For example, as shown in FIG. 1, the building 2 has two floors, and the server room 21 is provided on each floor. A server rack 4 is arranged in the server room 21, and the server is stored and installed in the server rack 4. Although heat is generated by the operation of the server, the temperature in the server room 21 is kept substantially constant by cooling by the indirect outside air cooling device 3.

  In addition to the server room 21, the building 2 is provided with an air conditioning machine room 22, an outdoor unit place (mechanical balcony) 23, a living room 24, and a heating outdoor unit place 25. The air conditioning machine room 22 is a room in which the air conditioner 31 of the indirect outside air cooling device 3 (the main body of the indirect outside air cooling device 3) is provided. The air conditioning machine room 22 is adjacent to the server room 21 and is provided on each floor in the same manner as the server room 21. The air conditioning machine room 22 is adjacent to the server room 21 via the side wall (inner wall) 2a. The air conditioning machine room 22 communicates with the upper part (ceiling space) of the upper wall 2b of the server room 21. A side wall 2 a adjacent to the air conditioning machine room 22 of the server room 21 is provided with an intake port (air outlet) 2 c through which air blown from the indirect outside air cooling device 3 can be taken into the server room 21. The intake 2c may be provided not only on the side wall 2a of the server room 21 but also on the upper wall 2b. Moreover, the discharge port which can discharge | emit the air in the server room 21 to the air-conditioning machine room 22 in the position away from the inlet 2c of the upper wall (ceiling) adjacent to the air-conditioning machine room 22 of the server room 21 (Not shown) 2p is provided.

  The outdoor unit place 23 is an outdoor unit room in which the outdoor unit 32 of the indirect outdoor air cooling device 3 is installed, and is a component of the air conditioning system 1. The outdoor unit storage 23 is adjacent to the air conditioning machine room 22 via the side wall 2d facing the side wall 2a of the air conditioning machine room 22 adjacent to the server room 21. The outdoor unit storage area 23 is adjacent to the outside (outside of the building 2) through a side wall 2d facing the side wall 2d adjacent to the air conditioning machine room 22 (outer wall separating the building 2 and the outside) 2e. . The floor 2f of the outdoor unit yard 23 is located at the same height as the floor of the air conditioner room 22 on the second floor. That is, the outdoor unit storage place 23 is provided only on the second floor in this embodiment. In addition, the height of the floor 2f of the outdoor unit yard 23 may be different from the height of the floors of other rooms on the second floor such as the air conditioning machine room 22 on the second floor.

  The side wall 2e adjacent to the outside of the outdoor unit yard 23 extends to the middle of the first floor portion in the height direction (vertical direction) (a position not in contact with the ground). That is, the side wall 2e extends below a floor 2f that is a lower surface on which the outdoor unit 32 is disposed. In addition, the floor 2f on which the outdoor unit 32 of the outdoor unit storage place 23 is arranged is provided with an opening as an intake port for taking in (introducing) the outside air only in that portion so that the outside air flows only from the lower part of the outdoor unit 32. Floor material (for example, fine floor). Further, an opening (open) is provided below the floor 2f of the outdoor unit 23 where the outdoor unit 32 is arranged, and insects and the like are prevented from entering the outdoor unit 23 from the outside. For this purpose, a net (for example, SUS mesh) 2g may be provided. Thus, the outdoor unit storage place 23 is provided with an intake port for taking in outside air.

  The living room 24 is, for example, an office where a manager of the data center performs work. As will be described later, in the configuration in which the outdoor air after heat exchange is introduced into the living room 24 from the outdoor unit yard 23, the living room 24 is a component of the air conditioning system 1 (part of the outdoor air utilization system). The living room 24 is adjacent to the server room 21 and the air conditioning machine room 22 via the side wall 2h of the server room 21 and the air conditioning machine room 22 perpendicular to the direction in which the server room 21 and the air conditioning machine room 22 are arranged. The living room 24 is heated in winter because it is continuously used by an administrator or the like.

  The heating outdoor unit storage room 25 is a room in which a heating outdoor unit 5 of a heating device for heating the living room 24 such as a room air conditioner (a configuration of a heating device other than the heating outdoor unit 5 is not shown) is installed. . As will be described later, in the configuration in which the outdoor air after heat exchange is introduced into the outdoor unit for heating 25 from the outdoor unit 23, the outdoor unit for heating 25 is a component of the air conditioning system 1 (part of the outdoor air utilization system). It is. The heating outdoor unit place 25 is adjacent to the outdoor unit place 23 through the side wall 2i of the outdoor unit place 23 perpendicular to the direction in which the air conditioning machine room 22 and the outdoor unit place 23 are arranged. Further, the outdoor unit for heating 25 is adjacent to the living room 24 with a side wall 2j perpendicular to the side wall 2i adjacent to the outdoor unit 23. The above is each room 21-25 of building 2.

  Subsequently, the indirect outside air cooling device 3 will be described. The indirect outside air cooling device 3 is a cooling device that performs cooling using outside air that is outside air (outside the building 2). The indirect outdoor air cooling device 3 includes an air conditioner 31 and an outdoor unit 32. In addition, a pipe 33 for circulating a refrigerant used for cooling is provided between the air conditioner 31 and the outdoor unit 32. Two pipes 33 are provided for sending the refrigerant from the air conditioner 31 to the outdoor unit 32 and for sending the refrigerant from the outdoor unit 32 to the air conditioner 31. Any one direction of the pipe 33 is provided with a pump 34 (not shown in FIG. 2) for circulating the refrigerant. The refrigerant is, for example, an antifreeze liquid.

  The air conditioner 31 is an apparatus that cools the server room 21 that is a room to be cooled by cooling air with a refrigerant. A plurality of air conditioning machine rooms 22 may be installed. In that case, for example, a plurality of air conditioning machine rooms 22 are installed side by side along the side wall 2 a adjacent to the server room 21 in the air conditioning machine room 22.

  The air conditioner 31 includes a first air conditioner coil 311, a second air conditioner coil 312, and an air conditioner blower 313. The first air conditioner coil 311 and the second air conditioner coil 312 are heat exchangers that cool the air by circulating heat and exchanging heat between the air sucked into the air conditioner 31 and the refrigerant. . The air to be cooled is air that is heated in the server room 21 by the heat generated by the server and discharged from the server room 21 to the air conditioning machine room 22. The first air conditioner coil 311 inputs the cooled refrigerant from the outdoor unit 32 through the pipe 33, and outputs the heat-exchanged and warmed refrigerant to the outdoor unit 32 through the pipe 33. The second air conditioner coil 312 inputs the refrigerant cooled by a refrigerator not shown. The second air conditioner coil 312 may be used when cooling using the first air conditioner coil 311 cannot be performed sufficiently, for example, when the temperature of the outside air is not low enough to perform indirect outside air cooling. Good.

  The air conditioner blower 313 is a device that blows air cooled by the first air conditioner coil 311 and the second air conditioner coil 312 toward the server room 21. The air conditioner blower 313 may include a plurality of fans, for example, two fans that can blow 50% of the necessary air volume, and operate even when one of the fans fails. Good (same for other blowers).

  The outdoor unit 32 is a device that inputs a refrigerant from the air conditioner 31 through a pipe 33 and cools the refrigerant by exchanging heat with the outside air. The outdoor unit 32 is provided for each air conditioner 31 on the first floor and the second floor. For example, a plurality of outdoor units 32 are installed side by side along the side wall 2d adjacent to the air conditioning machine room 22 in the outdoor unit place 23.

  The outdoor unit 32 includes an outdoor unit coil 321 and an outdoor unit blower 322. The outdoor unit coil 321 is a heat exchanger that cools the refrigerant by circulating the refrigerant and exchanging heat between the outside air and the refrigerant. The outdoor unit coil 321 inputs the warmed refrigerant from the air conditioner 31 through the pipe 33, and outputs the heat-exchanged and cooled refrigerant to the air conditioner 31 through the pipe 33. The outside air heat-exchanged in the outdoor unit coil 321 flows into the outdoor unit storage place 23 from the lower opening (intake) of the outdoor unit storage place 23.

  The outdoor unit blower 322 is a device that blows the outside air that has been heated and heat-exchanged by the outdoor unit coil 321. Air blowing by the outdoor unit blower 322 is performed upward of the outdoor unit storage place 23. As the outside air warmed above the outdoor unit storage 23 is blown, new outside air (outside air to be heat-exchanged from now on) from the outside passes through the opening (inlet) below the outdoor unit storage 23 as described above. It is taken in (inflows) to the outdoor unit yard 23 through.

  The indirect outside air cooling device 3 itself may be the same as the conventional device. Further, the operation of the outdoor unit blower 322, for example, the rotational speed of the fan may be variably controlled based on the temperature of the refrigerant (circulated water temperature) to reduce the power of the outdoor unit blower 322. Further, the rotational speed of the pump 34 may be variably controlled based on the room temperature in the server room 21 to reduce the power of the pump 34.

  The air conditioning system 1 according to the present embodiment has the following configuration as a configuration related to warmed outside air (warm air) after heat exchange. As shown in FIG. 1, above the side wall 2e facing the outside of the outdoor unit yard 23, a gallery 2k is provided as a discharge port for discharging (releasing) outside air after heat exchange to the outside. The blades of the louver 2k may be provided in the horizontal direction or may be provided in the height direction. Further, a current shielding plate 2m that is a current shielding member that shields between the gallery 2k and the outdoor unit 32 is provided inside the gallery 2k. One end of the current shielding plate 2m is fixed to the lower end of the louver 2k, and the other end extends obliquely upward toward the side wall 2d. The vertical length of the current shielding plate 2m is approximately the same as the vertical length of the louver 2k. By providing the current shielding plate 2m, the warmed outside air blown from the outdoor unit 32 temporarily moves to a position higher than the gallery 2k and is discharged from the gallery 2k to the outside. Further, the current shielding plate 2m is also a snow return plate for preventing snow, rain, and the like from entering the outdoor unit storage place 23 from the gallery 2k.

  Moreover, in this embodiment, the warm external air after heat exchange is utilized in another room. In other words, the air conditioning system 1 includes an outside air utilization system that can use the outside air after heat exchange in the outdoor unit storage place 23. Specifically, it is used in the outdoor unit yard 25 for heating. For this reason, the outdoor unit 23 and the heating outdoor unit 25 are connected so that the heated outside air can be introduced from the outdoor unit 23 to the heating outdoor unit 25. Specifically, as shown in FIG. 2, an opening serving as an inlet 2n for warmed outside air is provided on a side wall 2i between the outdoor unit place 23 and the heating outdoor unit place 25. The introduction port 2n may be provided with a blower so that outside air is introduced from the outdoor unit place 23 to the heating outdoor unit place 25 (for easy introduction).

  When the heated outside air is introduced into the heating outdoor unit yard 25, the heat pump efficiency of the heating outdoor unit 5 can be improved, and the heating device can be operated efficiently. In this case, the heating outdoor unit place 25 is an outside air utilization room in which warmed outside air is used.

  Moreover, it is good also as a structure which utilizes the warm external air after heat exchange in the living room 24. FIG. For this purpose, the outdoor unit 23 and the living room 24 are connected so that the outside air heated from the outdoor unit 23 to the living room 24 can be introduced. Specifically, a heated outside air inlet 2n is provided on the side wall 2i between the outdoor unit 23 and the heating outdoor unit 25, and a duct connected from the inlet 2n to the living room 24 is provided. Also in this case, similarly to the heating outdoor unit place 25, the introduction port 2n is provided with a blower for introducing outside air.

  When the warm outside air is introduced into the living room 24, the living room 24 is heated. In this case, the living room 24 is an outside air utilization room where warmed outside air is used. The above is the configuration of the air conditioning system 1 according to the present embodiment.

  Subsequently, the operation of the air conditioning system 1 according to the present embodiment will be described. As shown in FIG. 1, in the air conditioning system 1, the air A <b> 1 sucked into the air conditioner 31 of the indirect outside air cooling device 3 is cooled by the first air conditioner coil 311 and the second air conditioner coil 312. The air is blown by the blower 313. The blown air A2 is taken into the server room 21 from the intake port 2c and cools the server room 21. The air heated in the server room 21 is discharged to the air conditioning machine room 22 from the discharge port 2p. The air A3 and A4 discharged to the air conditioning machine room 22 is again sucked into the air conditioner 31 and used for cooling.

  The refrigerant that has been used and warmed by the first air conditioner coil 311 to cool the air A <b> 1 is output from the first air conditioner coil 311 to the outdoor unit 32 through the pipe 33. The refrigerant is input to the outdoor unit coil 321 of the outdoor unit 32. Outside air A5 that flows into the outdoor unit 32 from outside is used by the outdoor unit coil 321 to cool the refrigerant. The cooled refrigerant is output from the outdoor unit coil 321 to the air conditioner 31 through the pipe 33. The refrigerant is used for air cooling by the first air conditioner coil 311.

  The outside air (a part) A6, A7, A8 after the heat exchange by the outdoor unit coil 321 of the outdoor unit 32 is blown by the outdoor unit blower 322 and discharged from the gallery 2k to the outside. On the other hand, as shown in FIG. 2, (a part of) the outside air A9 after heat exchange is introduced into the heating outdoor unit place 25 from the introduction port 2n. The introduced outside air is used to operate the heating device efficiently. Alternatively, the outside air A9 after heat exchange is introduced into the living room 24 from the introduction port 2n. The introduced outside air is used for heating the living room 24. The above is the operation of the air conditioning system 1 according to the present embodiment.

  As described above, in the present embodiment, the warmed outside air after heat exchange is introduced into an outside air use room such as the heating outdoor unit storage room 25 or the living room 24 and used for heating or the like, for example. Since the place where the indirect outside air cooling device 3 performs cooling is usually a place where the temperature of the outside air is low and cold, heating may be required, and the warmed outside air can be used. In addition, in the indirect outside air cooling device 3, since outside air is not contaminated, there is no problem even if outside air is introduced into the heating outdoor unit storage room 25 or the living room 24. That is, according to this embodiment, the outside air after heat exchange can be used efficiently.

  Further, as described above, by providing an opening only in the lower part of the outdoor unit 32 on the floor 2f of the outdoor unit place 23, all the outside air flowing into the outdoor unit place 23 from the outside is taken in via the outdoor unit 32. That is, it can be configured such that outside air from the outside flows directly into the outdoor unit 32. This prevents air that does not pass through the outdoor unit 32 from flowing into the outdoor unit place 23, and the outside air after heat exchange through the outdoor unit 32 in the outdoor unit place 23 does not pass through the outdoor unit 32. It can prevent that it is cooled by. Further, it is possible to prevent outside air after heat exchange via the outdoor unit 32 from flowing out from the floor 2f of the outdoor unit storage place 23. When the outflow occurs, the outside air after the heat exchange that has flowed out is taken into the outdoor unit 32 again, the temperature of the outside air taken in by the outdoor unit 32 rises, and the heat exchange efficiency of the outdoor unit 32 decreases (outdoor unit). The cooling effect of the refrigerant by 32 is obstructed (short circuit). By preventing the outflow as described above, it is possible to prevent a decrease in heat exchange efficiency. As described above, according to this configuration, it is possible to reduce the obstruction of the use of outside air (thermal energy) after heat exchange.

  Moreover, it is good also as providing the gallery 2k and the baffle 2m in the outdoor unit place 23 like this embodiment. Usually, an outdoor air outlet is provided in the outdoor unit place of the indirect outdoor air cooling device. Moreover, since it is difficult to introduce all the warmed outside air after heat exchange into the outside air utilization chamber, an outside air outlet is required. When the outside air discharge port is provided as described above, it is conceivable that the warm outside air after the heat exchange is cooled by the cold air from the discharge port, which hinders the use of the warm outside air. However, if the current shielding plate 2m is provided as in the present embodiment, the path can be lengthened until the outside air after the heat exchange is discharged to the outside, and after the heat exchange introduced into the outside air utilization chamber. It is possible to prevent the outside air from being cooled by the outside cold air. Thereby, the efficient utilization of the outside air after heat exchange can be promoted. Moreover, since the current shielding plate 2m according to the present embodiment can prevent intrusion into the outdoor unit storage place 23 such as snow or rain, the life of the device can be extended.

  Moreover, it is good also as introducing the external air after heat exchange into the outdoor unit place 25 for heating like this embodiment. According to this configuration, the heating device can be operated efficiently as described above. Alternatively, the outside air of the heat exchanger may be introduced into the living room 24 and used directly for heating. In addition to the above, the room may be introduced into any room as long as warmed air is used. Further, the device that uses the outside air (thermal energy) after heat exchange (the device that exchanges heat with the outside air after heat exchange) does not necessarily have to be the heating outdoor unit 5 as described above. For example, the apparatus is a heat pump type hot water heater, and is configured to introduce outside air after heat exchange into a room provided with a heat pump type hot water heater in addition to or instead of the outdoor unit 25 for heating. May be. According to this configuration, the water heater can be operated efficiently. Further, the outside air after heat exchange does not necessarily have to be used in the outside air use room which is a room other than the outdoor unit place 23, and may be used in the outdoor unit place 23. For example, the outdoor air utilization system is configured to include a device that uses outdoor air after heat exchange, such as a heating outdoor unit 5 or a heat pump water heater installed in the outdoor unit storage 23 (the device is installed in the outdoor unit storage 23). Configuration).

  Moreover, it is good also as taking the structure which provides the outdoor unit storage place 23 in the 2nd floor like this embodiment, and the side wall 2e is extended in the middle of the part of the 1st floor. According to this configuration, it is possible to prevent the intake of outdoor air into the outdoor unit storage place 23 from being blocked by snow or the like. Thereby, it can prevent that external air utilization is inhibited.

  Subsequently, a modification of the embodiment of the present invention will be described. In this modification, the operation of the outdoor unit 32 is controlled. In addition, about the point which is not demonstrated below, it is the same as that of embodiment mentioned above. FIG. 3 is a plan view showing an air conditioning system 100 according to the present modification. In the indirect outdoor air cooling device 300 included in the air conditioning system 100 according to this modification, a plurality of outdoor units 32 are provided in the outdoor unit storage place 23 as in the above-described embodiment.

  In the above-described embodiment, the air conditioner 31 and the outdoor unit 32 are connected by the pipe 33 on a one-to-one basis. However, in this modification, all the air conditioners 31 and all the outdoor units 32 are integrated. Connected with. Specifically, it is configured as follows. As shown in FIG. 3, a chilled water header 110 on the air conditioner 31 side and a chilled water header 120 on the outdoor unit 32 side are provided, and a pipe 130 connecting between them is provided. A pipe 111 from each air conditioner 31 is connected to the cold water header 110 on the air conditioner 31 side. A pipe 121 from each outdoor unit 32 is connected to the cold water header 120 on the outdoor unit 32 side. A refrigerant can circulate in the cold water headers 110 and 120 and the pipes 130, 111, and 121 connected to each other. With this configuration, the refrigerant used for heat exchange in any air conditioner 31 can be cooled in any outdoor unit 32.

  The chilled water headers 110 and 120 and the pipes 130, 111, and 121 are for sending refrigerant from the air conditioner 31 to the outdoor unit 32 and for sending refrigerant from the outdoor unit 32 to the air conditioner 31 as in the above-described embodiment. Two of them are provided. A pump 140 for circulating the refrigerant is provided in the pipe 130 in any one direction. In FIG. 3, only one pipe 130 connecting the cold water header 110 on the air conditioner 31 side and the cold water header 120 on the outdoor unit 32 side is shown, but a plurality of pipes 130 may be provided. Good.

  Valves are provided in a portion where the pipe 111 is connected to the cold water header 110 and a portion where the pipe 121 is connected to the cold water header 120. By closing the valves of the pipe 111 and the pipe 121 corresponding to the air conditioner 31 and the outdoor unit 32 that are not operating, it is possible to stop the input / output of the refrigerant in the air conditioner 31 and the outdoor unit 32.

  When the refrigerant can be cooled by an arbitrary outdoor unit 32 as in the configuration of this modification, depending on the operating state of the indirect outdoor air cooling device 300, that is, the operating state of the air conditioner 31, all the outdoor units 32 may be It may not be necessary to operate. For example, when the operation rate of the server is low or the number of mounted servers is small, it is not necessary to operate all the air conditioners 31. In that case, it is not necessary to operate all the outdoor units 32 accordingly. When the number of outdoor units 32 that operate is small, the generation of warm outside air after heat exchange is reduced. In this modification, even in such a case, the indirect outside air cooling apparatus 300 can be efficiently operated and the outside air after heat exchange can be efficiently used. .

  The air conditioner 31 to be operated and the load (intensity) at which the air conditioner 31 is operated are set in advance by a data center manager or the like. Alternatively, they may be automatically controlled according to the temperature in the server room 21 or the like.

  In order to achieve the above, in the present modification, the air conditioning system 100 includes a temperature sensor 150, a flow sensor 160, and an automatic control panel 170. As the temperature sensor 150, the flow sensor 160, and the automatic control panel 170, the same hardware as that of a conventional device can be used. The automatic control panel 170 is connected to the temperature sensor 150 and the flow sensor 160, respectively, and can receive information from these sensors 150 and 160. The automatic control panel 170 is connected to each outdoor unit 32 and the valves of the pipes 111 and 121, and can control the operation by transmitting a control signal.

  The temperature sensor 150 is provided in the pipe 130 and is a function of a control unit that detects the temperature (° C.) of the refrigerant inside the pipe 130. The temperature sensor 150 is provided in each of the pipe 130 for sending the refrigerant from the air conditioner 31 to the outdoor unit 32 and the pipe 130 for sending the refrigerant from the outdoor unit 32 to the air conditioner 31. To detect. The temperature sensor 150 notifies each detected temperature to the automatic control panel 170 as information indicating the operation state of the air conditioner 31.

  The flow sensor 160 is provided in the pipe 130 for sending the refrigerant from the air conditioner 31 to the outdoor unit 32, and is a function of a control unit that detects the flow rate (l / min) of the refrigerant inside the pipe 130. The flow rate sensor 160 notifies the detected flow rate to the automatic control panel 170 as information indicating the operation state of the air conditioner 31.

  The automatic control panel 170 is a control means for controlling the operation of the outdoor unit 32 according to the operation state of the air conditioner 31 notified from the temperature sensor 150 and the flow rate sensor 160 and the position where the outdoor unit 32 is provided. It is a function. The automatic control panel 170 is installed on the side surface of the air conditioning machine room 22, for example, and includes a computer having a CPU (Central Processing Unit) and a memory. Specifically, the automatic control panel 170 performs control as follows.

  The automatic control panel 170 calculates the amount of heat related to the operation of the air conditioner 31 based on the information notified from the temperature sensor 150 and the flow sensor 160. First, the automatic control panel 170 calculates the temperature difference between the refrigerant temperature from the outdoor unit 32 to the air conditioner 31 and the refrigerant temperature from the air conditioner 31 to the outdoor unit 32 based on the notification from the temperature sensor 150. Subsequently, the automatic control panel 170 calculates the amount of heat (kW) by calculating the product of the calculated temperature difference and the flow rate notified from the flow sensor 160.

  The automatic control panel 170 stores in advance the correspondence between the amount of heat and the number of outdoor units 32 to be operated. This correspondence relationship is such that the greater the amount of heat, the greater the number of outdoor units 32 to be operated. The automatic control panel 170 determines the number of outdoor units 32 to be operated as the number of outdoor units 32 corresponding to the calculated amount of heat in the stored correspondence relationship. The automatic control panel 170 determines that the outdoor units 32 are to be operated in the order in which they are installed at a location closer to the outside air inlet 2n by the determined number of the outdoor units 32. The automatic control panel 170 stores the outdoor unit 32 in advance in the order in which the automatic control panel 170 is installed in a place near the outside air inlet 2n.

  For example, if it is determined that three outdoor units 32 are to be operated, it is determined that the three outdoor units 32 are to be operated in the order in which they are installed in a location close to the outside air inlet 2n, as shown by hatching in FIG. To do. The automatic control panel 170 transmits a control signal to be operated (for example, a control signal to start operation by turning on the power) to the outdoor unit 32 determined to be operated. The automatic control panel 170 transmits a control signal for stopping the operation (for example, a control signal for terminating the operation and turning off the power) to the outdoor units 32 other than the outdoor unit 32 determined to be operated. With the above control, the number of operating outdoor units 32 can be determined (reduced) according to, for example, exhaust heat (heat generation) in the server room 21.

  For example, the automatic control panel 170 performs the above-described control at predetermined time intervals. If the outdoor unit 32 that has been determined to operate is already operating, or the outdoor unit 32 other than the outdoor unit 32 that has been determined to operate is not operating, the automatic control panel 170 A control signal may not be transmitted to the outdoor unit 32.

  Further, in order to allow refrigerant to be input and output between the outdoor unit 32 to be operated and the air conditioner 31, the automatic control panel 170 performs control to open the valve of the pipe 121 connected to the outdoor unit 32 to be operated. On the other hand, the automatic control panel 170 performs control to close the valve of the pipe 121 connected to the outdoor unit 32 that is not operated. When a plurality of pipes 130 for connecting the cold water headers 110 and 120 are provided, the automatic control panel 170 controls only valves provided in the pipes 130 and only the pipes 130 close to the outdoor unit 32 to be operated. May be used. The above is the configuration of the air conditioning system 100 according to the present modification.

  Subsequently, an operation of the air conditioning system 100 according to the present modification will be described. In the air conditioning system 100, the temperature of the refrigerant in the pipe 130 is detected by the temperature sensor 150, and the detected temperature is notified to the automatic control panel 170. Further, the flow rate of the refrigerant inside the pipe 130 is detected by the flow rate sensor 160 and the detected flow rate is notified to the automatic control panel 170. Subsequently, the automatic control panel 170 determines the outdoor unit 32 to be operated based on the information notified from the temperature sensor 150 and the flow rate sensor 160, and performs control so that the determined outdoor unit 32 operates. Is called.

  Except for the above control, the air conditioning system 100 according to the present modification operates in the same manner as the air conditioning system 1 according to the above-described embodiment. That is, the outdoor air A9 after heat exchange blown from the operating outdoor unit 32 is introduced from the introduction port 2n into the heating outdoor unit storage room 25 or the living room 24. Since the outdoor unit 32 is controlled to operate in order from the one close to the introduction port 2n, the outdoor air A9 after heat exchange is blown at a position near the introduction port 2n. The above is the operation of the air conditioning system 100 according to the present modification.

  According to the configuration of the present modification, when the indirect outdoor air cooling device 300 provided with a plurality of outdoor units 32 is used, only the necessary outdoor unit 32 that matches the operation of the indirect outdoor air cooling device 300 (of the air conditioner 31) is used. Can be operated. That is, the indirect outside air cooling device 300 can be operated efficiently. Further, since the outdoor unit 32 to be operated is determined according to the position where the outdoor unit 32 is installed, specifically, the distance from the inlet 2n, as described above, after heat exchange at a position close to the inlet 2n. The outside air is blown. Accordingly, it is possible to prevent the outside air after heat exchange from being cooled before reaching the inlet 2n. That is, for example, even when the exhaust heat in the server room 21 is insufficient due to a low server operation rate or a small number of mounted servers, the outside air after heat exchange can be efficiently used. .

  In addition, the introduction port 2n for introducing outside air into the outside air utilization room is not necessarily provided on the side wall 2i of the outdoor unit storage place 23. For example, by using a duct or the like, the introduction port 2n can be provided at an arbitrary position in the outdoor unit storage place 23. Even in this case, as in the above-described modification, the outdoor unit 32 installed at a position close to the introduction port 2n provided at the arbitrary position is operated to efficiently use the outdoor air after heat exchange. be able to.

  DESCRIPTION OF SYMBOLS 1,100 ... Air-conditioning system, 2 ... Building, 21 ... Server room, 22 ... Air-conditioning machine room, 23 ... Outdoor unit place, 24 ... Living room, 25 ... Outdoor unit place for heating, 2c ... Intake port, 2f ... Floor 2k ... Gallery, 2m ... Current shielding plate, 2n ... Inlet, 3,300 ... Indirect outside air cooling device, 31 ... Air conditioner, 311 ... First air conditioner coil, 312 ... Second air conditioner coil, 313 ... Air conditioner blower, 32 ... outdoor unit, 321 ... outdoor unit coil, 322 ... outdoor unit blower, 33 ... piping, 34 ... pump, 4 ... server rack, 5 ... outdoor unit for heating, 110, 120 ... cold water header, 111, 121, 130 ... piping, 140 ... pump, 150 ... temperature sensor, 160 ... flow sensor, 170 ... automatic control panel.

Claims (4)

An indirect outdoor air cooling device that has an outdoor unit that cools the refrigerant by heat exchange with the outside air, and that performs cooling with the refrigerant;
An outdoor unit room in which the outdoor unit is provided and an intake port for taking in outside air is provided;
An outside air utilization system that makes it possible to use outside air after heat exchange in the outdoor unit room;
Equipped with a,
The outside air utilization system includes an outside air utilization room connected to the outdoor unit room so that outside air after heat exchange can be introduced from the outdoor unit room,
The outdoor unit room and the outside air utilization room are adjacent to each other, and an outside air inlet after heat exchange from the outdoor unit room to the outside air utilization room is provided on a side wall separating the outdoor unit room and the outside air utilization room. An opening is provided,
An air conditioning system in which an outdoor unit of a heating device or a heat pump type water heater is provided in the outside air utilization room . An indirect outdoor air cooling device that has an outdoor unit that cools the refrigerant by heat exchange with the outside air, and that performs cooling with the refrigerant;
An outdoor unit room in which the outdoor unit is provided and an intake port for taking in outside air is provided;
An outside air utilization system that makes it possible to use outside air after heat exchange in the outdoor unit room;
Equipped with a,
In the outdoor unit room,
A discharge port for discharging outside air introduced into the outdoor unit room to the outside;
A current-blocking member that is provided between the outlet and the outdoor unit and lengthens the path until the outside air after heat exchange is discharged to the outside;
An air conditioning system is provided . An indirect outdoor air cooling device that has an outdoor unit that cools the refrigerant by heat exchange with the outside air, and that performs cooling with the refrigerant;
An outdoor unit room in which the outdoor unit is provided and an intake port for taking in outside air is provided;
An outside air utilization system that makes it possible to use outside air after heat exchange in the outdoor unit room;
Equipped with a,
The intake is an air conditioning system provided at a lower portion of the outdoor unit on the lower surface of the outdoor unit room . An indirect outdoor air cooling device that has an outdoor unit that cools the refrigerant by heat exchange with the outside air, and that performs cooling with the refrigerant;
An outdoor unit room in which the outdoor unit is provided and an intake port for taking in outside air is provided;
An outside air utilization system that makes it possible to use outside air after heat exchange in the outdoor unit room;
Equipped with a,
The indirect outdoor air cooling device has a plurality of the outdoor units,
Further comprising control means for detecting the operation state of the indirect outdoor air cooling device, and controlling the operation of the outdoor unit according to the detected operation state and the position where each of the outdoor units is provided,
The outdoor unit room is provided with an opening for making use of outside air after heat exchange,
The said control means is an air-conditioning system which controls operation | movement of an outdoor unit according to the relationship between the position in which each said outdoor unit was provided, and the position of the said opening .

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