JP6747920B2 - Air conditioning system - Google Patents

Description

The present invention relates to an air conditioning system.

Along with energy saving of lighting and OA (Office Automation) equipment and improvement of heat insulation performance of buildings, the load of air conditioning required for cooling and heating of offices is also decreasing. Also, the temperature at which a person feels comfortable varies from person to person. For this reason, in recent years, the idea of air conditioning the entire room is being reconsidered, and for example, Patent Literature 1 discloses a technique for individually air conditioning.

JP, 2009-156510, A JP, 2010-197027, A JP, 09-229507, A

However, if individual air-conditioning is to be achieved with air from ducts drawn from the air-conditioning machine room of a building, the heating and cooling heat to reach the temperature desired by each person will be transported by air, so liquid such as water will be used. There is much waste of heat transport power compared to transportation. Therefore, it is possible to realize individual air conditioning by using a refrigerator that cools liquids such as water, but since a certain amount of ventilation is required for the indoor space where people are, it is not necessary to omit the route for taking in outside air into the room. difficult.

Further, since it is not easy to dehumidify by providing a drain pipe for collecting condensed water to each small air conditioner individually prepared for each occupant, it is difficult to omit a device for dehumidifying the taken outside air. The temperature range differs between the refrigerant used for condensing the taken-in moisture in the outside air and the refrigerant used for individual air conditioning, but it is troublesome to separately prepare a device corresponding to each temperature range.

Then, this application aims at provision of the technique which implement|achieves individual air conditioning, without making the apparatus structure of the whole air conditioning system complicated.

In order to solve the above problems, the air conditioning system of the present application is installed in a supply/exhaust path for ventilation, and is installed in a living room and a first air conditioner that air-conditions outside air that supplies air to the living room. And a second air conditioner for air conditioning, the first air conditioner having a heat source device having a condenser arranged in a path through which exhaust air from the living room passes and a path through which outside air supplied to the living room passes. And a first coil through which cold water that has undergone heat exchange in the evaporator of the heat source device passes, and the second air conditioner is configured such that cold water that has passed through the first coil or other cold water that has exchanged heat with the cold water passes through the first air coil. It has a second coil passing through. According to the above air conditioning system, the cold water used for air conditioning of the second air conditioner can be maintained at an appropriate temperature, and individual air conditioning can be realized without complicating the device configuration of the entire air conditioning system.

In the above air conditioning system, the first air conditioner has a third coil through which the refrigerant circulating in the condenser and the evaporator passes, and the third coil is arranged in a path through which the outside air for supplying air to the living room passes. Good. Further, in the above air conditioning system, the first air conditioner may be installed in the space above the ceiling of the living room.

Further, the air conditioning system of the present application is installed in the air supply/exhaust path for ventilation, and is installed in the first air conditioner for air conditioning the outside air to be supplied to the living room, and is installed in the living room, and takes in the air in the living room for air conditioning. A second air conditioner and a heat source device having a condenser and an evaporator are provided, and the first air conditioner is arranged in a path through which outside air that supplies air to the living room passes, and cold water that has undergone heat exchange in the evaporator is The second air conditioner has a second coil through which the cold water that has passed through the first coil or another cold water that has exchanged heat with the cold water passes through. According to the above air conditioning system, the cold water used for air conditioning of the second air conditioner can be maintained at an appropriate temperature, and individual air conditioning can be realized without complicating the device configuration of the entire air conditioning system.

In the above air conditioning system, the first air conditioner has a third coil through which the refrigerant circulating in the condenser and the evaporator passes, and the third coil is arranged in a path through which the outside air for supplying air to the living room passes. Good. Further, in the above air conditioning system, the first air conditioner may be installed in the space above the ceiling of the living room.

Further, the air conditioning system of the present application is installed in the air supply/exhaust path for ventilation, and is installed in the first air conditioner for air conditioning the outside air to be supplied to the living room, and is installed in the living room, and takes in the air in the living room for air conditioning. A second air conditioner, wherein the first air conditioner is arranged in a heat source device having an evaporator arranged in a path through which exhaust air from the living room passes, and in a path through which outside air supplied to the living room passes, A first coil through which the hot water that has undergone heat exchange in the condenser of the machine passes, and the second air conditioner has a second coil through which the hot water that has passed through the first coil or another hot water that has exchanged heat with the hot water passes. Have. According to the above air conditioning system, the hot water used for air conditioning of the second air conditioner can be maintained at an appropriate temperature, and individual air conditioning can be realized without complicating the device configuration of the entire air conditioning system.

Furthermore, the air conditioning system of the present application is installed in the air supply/exhaust path for ventilation, and is installed in the living room and the first air conditioner that air-conditions the outside air supplied to the living room, and takes in the air in the living room A second air conditioner, wherein the first air conditioner is arranged on a heat pump heat source device having a first heat exchanger arranged on a path through which exhaust air from the living room passes, and on a path through which outside air supplied to the living room passes. And a first coil through which the refrigerant water that has been heat-exchanged by the second heat exchanger of the heat pump heat source machine passes, and the second air conditioner heats the refrigerant water that has passed through the first coil or the refrigerant water and the heat. It has a 2nd coil through which other exchanged refrigerant water passes. According to the above air conditioning system, the coolant water used for air conditioning of the second air conditioner can be maintained at an appropriate temperature, and without complicating the overall device configuration of the air conditioning system, both during cooling and during heating. Individual air conditioning can be realized.

According to the present application, it is possible to provide a technique for realizing individual air conditioning without complicating the device configuration of the entire air conditioning system.

FIG. 1 is a diagram showing a schematic configuration of an air conditioning system according to the first embodiment. FIG. 2 is a configuration diagram of the air conditioner according to the first embodiment. FIG. 3 is a block diagram of the task air conditioning desk. FIG. 4 is a configuration diagram of the fan coil unit. FIG. 5 is a configuration diagram of a floor-standing fan coil unit. FIG. 6 is a configuration diagram of an air conditioner according to the second embodiment. FIG. 7: is a figure which shows schematic structure of the air conditioning system which concerns on 3rd Embodiment. FIG. 8: is a figure which shows schematic structure of the air conditioning system which concerns on 4th Embodiment. FIG. 9 is a configuration diagram of an air conditioner according to the fourth embodiment. FIG. 10: is a figure which shows schematic structure of the air conditioning system which concerns on a 1st modification. FIG. 11 is a configuration diagram of an air conditioner according to the second modification.

Hereinafter, an air conditioning system according to each embodiment will be described with reference to the drawings. The configurations of the following respective embodiments are examples, and the air conditioning system of the present application is not limited to the configurations of the respective embodiments. The configurations of the respective embodiments may be combined as much as possible. Numerical values such as temperature and flow rate in the figure are reference numerical values during cooling and heating, and the present invention is not limited to these numerical values.

<First Embodiment>
《Air conditioning system》
FIG. 1 is a diagram showing a schematic configuration of an air conditioning system 1 according to the first embodiment. The air conditioning system 1 of the first embodiment performs air conditioning of a target space (a room to be conditioned), and, for example, adjusts temperature, humidity, and cleanliness of indoor air. The first embodiment is an example in which the air conditioning system 1 is applied to an office, and as shown in FIG. 1, the office is provided with an office room 2 and a conference room 3 as a target space. The office room 2 and the meeting room 3 are examples of living rooms. The office has a double ceiling structure in which a space 14 is provided between the ceiling 11 of the office room 2 and the ceiling 12 of the conference room 3 and the ceiling slab 13. The ceilings 11 and 12 are provided with a plurality of outlets 15 and a plurality of return air ports 16.

The air conditioning system 1 includes an air conditioner 4. The air conditioner 4 is installed in a supply/exhaust path for ventilation. The air conditioner 4 air-conditions the outside air that supplies air to living rooms such as the office 2 and the conference room 3. The air conditioner 4 is an example of a first air conditioner. Outside air is taken into the air conditioner 4 through the air supply duct 21 connected to the air conditioner 4. The air supply duct 22 connected to the air conditioner 4 is drawn into the space 14 above the ceiling, and the air supply duct 22 is connected to the plurality of air outlets 15 provided in the ceilings 11 and 12. Outside air is supplied into the office room 2 and the conference room 3 through the outlets 15 provided on the ceilings 11 and 12.

The air in the office room 2 and the air in the conference room 3 return to the space 14 behind the ceiling via the return air openings 16 provided in the ceilings 11 and 12. Ventilation of the office room 2 and the conference room 3 is performed via the air outlet 15 and the return air opening 16 provided on the ceilings 11 and 12. Exhaust gas is taken into the air conditioner 4 from the space 14 above the ceiling via the exhaust duct 23 connected to the air conditioner 4. Exhaust gas is exhausted from the air conditioner 4 via an exhaust duct 24 connected to the air conditioner 4.

In the air conditioning system 1, cold water circulates through the office room 2, the conference room 3, the air conditioner 4, and the like. In the first embodiment, the case where the air conditioner system 1 is used for cooling is described. Therefore, although cold water circulates through the office room 2, the conference room 3, the air conditioner 4, etc., heating is performed by the air conditioner system 1. When performing, hot water circulates through the office room 2, the conference room 3, the air conditioner 4, and the like. Therefore, in each embodiment, when heating is performed by the air conditioner system 1, cold water may be read as hot water. Further, in each embodiment, when air conditioning is performed by the air conditioning system 1, cold/hot water circulates in the office room 2, the conference room 3, the air conditioner 4, and the like. Therefore, in each embodiment, when air conditioning is performed by the air conditioner system 1, cold water may be read as cold hot water. The air conditioning system 1 includes cold water circulation pipes 25 and 26. The cold water circulation pipe 25 is branched and connected to the air conditioner 4, and the cold water circulation pipe 26 is connected to the air conditioner 4. A cold water pump 27 is provided in the cold water circulation pipe 26. By driving the cold water pump 27, the cold water flows from the air conditioner 4 into the cold water circulation pipe 25, and the cold water returns from the cold water circulation pipe 26 to the air conditioner 4.

FIG. 2 is a configuration diagram of the air conditioner 4 according to the first embodiment. The air conditioner 4 includes an air supply fan 41 and an exhaust fan 42. By driving the air supply fan 41, outside air is taken into the air conditioner 4 via the air supply duct 21. The outside air taken into the air conditioner 4 is introduced into the air supply duct 22 through the air supply path 43, so that the outside air is supplied to the space 14 above the ceiling. By driving the exhaust fan 42, exhaust air is taken into the air conditioner 4 from the space 14 above the ceiling via the exhaust duct 23. The exhaust gas taken into the air conditioner 4 passes through the exhaust path 44 and is exhausted from the air conditioner 4 via the exhaust duct 24.

The air conditioner 4 includes a heat pump heat source device 45 and coils 46 to 48. An air conditioning refrigerator may be used instead of the heat pump heat source device 45. The coils 46 to 48 are heat exchangers for exchanging heat between cold water and air passing through the pipes forming the coils 46 to 48. The coils 46 and 48 are arranged in the air supply path 43 and adjust the temperature and humidity of the outside air passing through the air supply path 43. The coil 47 is arranged in the exhaust path 44. The heat pump heat source device 45 has an evaporator 51, a compressor 52, a condenser 53, and an expansion valve 54. The evaporator 51 and the condenser 53 are heat exchangers. The refrigerant circulates through the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54. The heat pump heat source device 45 is arranged in the exhaust path 44. When the air conditioner system 1 performs cooling, when the refrigerant sent to the condenser 53 is condensed, heat exchange is performed between the exhaust gas passing through the exhaust passage 44 and the refrigerant sent to the condenser 53. Since the refrigerant is cooled by the exhaust gas passing through the exhaust passage 44, the temperature of the exhaust gas passing through the exhaust passage 44 is preferably low. When the air conditioner system 1 performs cooling, the temperature of the exhaust gas taken into the air conditioner 4 via the exhaust duct 23 is lower than the temperature of the outside air taken into the air conditioner 4 via the air supply duct 21. .. Since the heat pump heat source device 45 is installed in the exhaust path 44, the efficiency of the heat source is improved. A circulation path for circulating cold water is provided in the air conditioner 4, and the cold water returned to the air conditioner 4 through the cold water circulation pipe 26 passes through the pipes forming the evaporator 51 and the coils 46 to 48. , Into the cold water circulation pipe 25. During heating, the evaporator 51 functions as a condenser and the condenser 53 functions as an evaporator. The functions of the evaporator and the condenser are reversed during cooling and heating.

The cold water that has flowed into the evaporator 51 via the cold water circulation pipe 26 undergoes heat exchange in the evaporator 51, and then flows into the coil 46 through the cold water circulation pipe 61. Specifically, the cold water that has flowed into the evaporator 51 exchanges heat with the refrigerant that circulates through the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54. The cold water passing through the pipes forming the coil 46 exchanges heat with the outside air passing through the air supply path 43, and then flows into the cold water circulating pipe 25 through the cold water circulating pipe 62 and the cold water circulating pipe 63. And flows into the coil 47. When the temperature of the outside air passing through the coil 46 is higher than the temperature of the cold water passing through the pipe forming the coil 46, the outside air is dehumidified when the outside air passes through the coil 46. The condensed water at the time of dehumidification is discharged to the exhaust path 44. The cold water passing through the pipe forming the coil 47 exchanges heat with the exhaust gas passing through the exhaust passage 44, and then flows into the coil 48 through the cold water circulation pipe 64. The cold water passing through the pipe forming the coil 48 exchanges heat with the outside air passing through the air supply passage 43, and then flows into the cold water circulating pipe 25. The coils 46 and 48 are an example of a first coil.

As shown in FIG. 2, the coils 46 and 48 are arranged in the air supply path 43. Therefore, after the temperature and humidity of the outside air passing through the air supply passage 43 is adjusted by using the cold water passing through the pipe forming the coil 46, the cold water passing through the pipe forming the coil 48 is passed through the air supply passage 43. The temperature of the outside air can be adjusted again. The cold water that has passed through the pipe that forms the coil 46 that is arranged in the air supply path 43 passes through the pipe that forms the coil 47 that is arranged in the exhaust path 44, and then forms the coil 48 that is arranged in the air supply path 43. Pass through the piping. Therefore, the temperature of the cold water passing through the pipe forming the coil 46 is different from the temperature of the cold water passing through the pipe forming the coil 48. In this way, the temperature and humidity of the outside air passing through the air supply path 43 can be adjusted using cold water having different temperatures. When air conditioning is performed in the air conditioner system 1, the outside air passing through the coil 46 is cooled by the cold water passing through the pipes forming the coil 46. Cold water passing through the pipes forming the coil 46 flows from the evaporator 51. When the outside air passing through the coil 46 is cooled by the cold water passing through the pipes forming the coil 46, the temperature of the outside air passing through the coil 46 becomes a considerably low temperature, and air is supplied to living rooms such as the office 2 and the conference room 3. It is not preferable as the temperature of the outside air. Since the cold water passes through the pipe forming the coil 47 arranged in the exhaust path 44, the temperature of the cold water passing through the pipe forming the coil 48 becomes higher than the temperature of the cold water passing through the pipe forming the coil 46.
By raising the temperature of the outside air that passes through the coil 48 by the cold water that passes through the pipes that form the coil 48, it is possible to adjust the temperature of the outside air that is supplied to the office room 2, the conference room 3, or the like to an appropriate temperature. ..

A plurality of task air conditioning desks 31 are installed in the office room 2, and a space in which the task air conditioning desks 31 are installed is a task space 32 for performing office work and the like. FIG. 3 is a configuration diagram of the task air conditioning desk 31. The task air conditioning desk 31 is an air conditioner that takes in air and adjusts the air. The task air conditioning desk 31 is an example of a second air conditioner. The task air conditioning desk 31 has a fan 311, a coil 312, a suction port 313, and a blowout port 314. The fan 311 is a blower that blows air into the task space 32. The coil 312 is a heat exchanger that exchanges heat between cold water and air that pass through the pipes that form the coil 312. The coil 312 is an example of a second coil.

When the fan 311 is driven, the air in the task space 32 is sucked through the suction port 313, and the air that has exchanged heat with the cold water by the coil 312 is blown out through the blowout port 314. Cold water circulation pipes 25 and 26 are connected to the coil 312. Cold water is supplied from the cold water circulation pipe 25 to the coil 312, and the cold water passing through the pipes forming the coil 312 returns to the cold water circulation pipe 26. Therefore, the cold water flowing from the air conditioner 4 into the cold water circulation pipe 25 passes through the coil 312, and the cold water passing through the pipes forming the coil 312 returns to the air conditioner 4 through the cold water circulation pipe 26.

A plurality of fan coil units 33 are installed on the ceilings 11 and 12. The fan coil unit 33 is an air conditioner that takes in air and adjusts the air. The fan coil unit 33 is an example of a second air conditioner. FIG. 4 is a configuration diagram of the fan coil unit 33. The fan coil unit 33 has a fan 331, a coil 332, and an outlet 333. The fan 331 is a blower that blows air, and has a built-in thermostat. The coil 332 is a heat exchanger that exchanges heat between the supplied cold water and the air. The coil 332 is an example of the second coil.

When the fan 331 is driven, air is taken in from the fan 331 and the air that has undergone heat exchange with the cold water by the coil 332 is blown out from the air outlet 333. Cold water circulation pipes 25 and 26 are connected to the coil 332. Cold water is supplied to the coil 332 from the cold water circulation pipe 25, and the cold water passing through the pipes forming the coil 332 returns to the cold water circulation pipe 26. Therefore, the cold water flowing from the air conditioner 4 into the cold water circulation pipe 25 passes through the coil 332, and the cold water passing through the pipes forming the coil 332 returns to the air conditioner 4 through the cold water circulation pipe 26.

A floor-standing fan coil unit 34 is installed in the conference room 3. The fan coil unit 34 is an air conditioner that takes in air and adjusts the air. The fan coil unit 34 is an example of a second air conditioner. FIG. 5 is a configuration diagram of the floor-standing fan coil unit 34. The fan coil unit 34 has a fan 341, a coil 342, and an outlet 343. The fan 341 is a blower that blows air, and has a built-in thermostat. The coil 342 is a heat exchanger that exchanges heat between the supplied cold water and air. The coil 342 is an example of a second coil.

When the fan 341 is driven, air is taken in from the fan 341, and the air that has undergone heat exchange with the cold water by the coil 342 is blown out from the air outlet 343. Cold water circulation pipes 25 and 26 are connected to the coil 342. Cold water is supplied to the coil 342 from the cold water circulation pipe 25, and the cold water passing through the pipes forming the coil 342 returns to the cold water circulation pipe 26. Therefore, the cold water flowing from the air conditioner 4 into the cold water circulation pipe 25 passes through the coil 342, and the cold water passing through the pipes forming the coil 342 returns to the air conditioner 4 through the cold water circulation pipe 26.

According to the air conditioning system 1 according to the first embodiment, the cold water circulating in the office room 2, the conference room 3, the air conditioner 4, etc. passes through the coils 46 to 48 after heat exchange is performed in the evaporator 51. The cold water passing through the pipes forming the coils 46 and 48 is heat-exchanged with the outside air passing through the air supply passage 43, and the cold water passing through the pipe constituting the coils 47 is discharged between the exhaust water passing through the exhaust passage 44. Heat exchange takes place in. Thereby, the cold water used for individual air conditioning can be maintained at an appropriate temperature. Therefore, according to the air conditioning system 1 of the first embodiment, individual air conditioning can be realized without complicating the device configuration of the entire air conditioning system.

For example, when the temperature of the cold water passing through the cold water circulation pipe 26 is 19° C. and the temperature of the cold water after the heat exchange in the evaporator 51 is 11° C., the cold water at the temperature of 11° C. is used for the individual air conditioning. And it is necessary to adjust the chilled water temperature to an appropriate temperature with an individual air conditioner. Therefore, it is not preferable to use cold water having a temperature of 11° C. for individual air conditioning. According to the air conditioning system 1 according to the first embodiment, the cold water after the heat exchange is performed in the evaporator 51 passes through the pipe forming the coil 46, so that the cold water and the outside air passing through the air supply path 43 are separated from each other. Since the heat exchange is carried out in, the temperature of the cold water after passing through the pipe forming the coil 46 is higher than the temperature of the cold water after the heat exchange in the evaporator 51. For example, when the temperature of the cold water after passing through the pipe forming the coil 46 is 16° C., heat exchange between the cold water of 16° C. by the coil 312 and the air sucked from the suction port 313 in the air conditioning desk 31. Then, the air of 20° C. is supplied from the air outlet 333. As described above, by using the cold water having a temperature of 16° C. for the individual air conditioning, it is not necessary to adjust the temperature of the cold water to an appropriate temperature by the individual air conditioners such as the air conditioning desk 31, the fan coil units 33 and 34. Here, the case where cold water is used for individual air conditioning has been described, but similarly when hot water is used for individual air conditioning, it is not necessary to adjust the temperature of the hot water to an appropriate temperature by the individual air conditioner. The temperature of cold water or hot water is supplied by supplying low-temperature cold water or high-temperature hot water from the air conditioner 4 to the office room 2 or the meeting room 3 and heating the cold water or cooling the hot water by the individual air conditioner. When adjusting the temperature to an appropriate temperature, it is necessary to separately provide a heater and a cooler in the individual air conditioner. Further, since cold air having a low temperature is supplied from the air conditioner 4 to the offices such as the office 2 and the meeting room 3, there is a high possibility that dew condensation will occur in the room such as the office 2 and the meeting room 3. By supplying cold water or hot water at an appropriate temperature from the air conditioner 4 to the office room 2, the meeting room 3 or the like, it is not necessary to separately provide a heater or a cooler in the individual air conditioner, and the office room 2 or the conference room Condensation in the living room such as the room 3 can be suppressed.

<Second Embodiment>
The air conditioning system 1 according to the second embodiment will be described. FIG. 6 is a configuration diagram of the air conditioner 4 according to the second embodiment. As shown in FIG. 6, the air conditioning system 1 according to the second embodiment is different from the air conditioning system 1 according to the first embodiment in the configuration of the air conditioner 4. Except for the configuration of the air conditioner 4, the configuration of the air conditioning system 1 according to the second embodiment is the same as the configuration of the air conditioning system 1 according to the first embodiment. In the second embodiment, the same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. In the air conditioner 4 according to the second embodiment, the temperature and humidity of the outside air that passes through the air supply path 43 is adjusted using the refrigerant that circulates in the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54.

The air conditioner 4 includes a heat pump heat source device 45 and coils 71 and 72. The coil 71 is a heat exchanger that exchanges heat between cold water and air passing through the pipes forming the coil 71. The coil 71 is an example of a first coil. The coil 72 is a heat exchanger that exchanges heat between the refrigerant passing through the coil 72 and the air. The coil 72 is an example of a third coil. The coils 71 and 72 are arranged in the air supply path 43 and adjust the temperature and humidity of the outside air passing through the air supply path 43. The heat pump heat source device 45 includes an evaporator 51, a compressor 52, a condenser 53, and an expansion valve 54. The heat pump heat source device 45 is arranged in the exhaust path 44. When the air conditioner system 1 performs cooling, when the refrigerant sent to the condenser 53 is condensed, heat exchange is performed between the exhaust gas passing through the exhaust passage 44 and the refrigerant sent to the condenser 53. Since the refrigerant is cooled by the exhaust gas passing through the exhaust passage 44, the temperature of the exhaust gas passing through the exhaust passage 44 is preferably low. When the air conditioner system 1 performs cooling, the temperature of the exhaust gas taken into the air conditioner 4 via the exhaust duct 23 is lower than the temperature of the outside air taken into the air conditioner 4 via the air supply duct 21. .. Since the heat pump heat source device 45 is installed in the exhaust path 44, the efficiency of the heat source is improved. A circulation path for circulating cold water is provided in the air conditioner 4, and the cold water returned to the air conditioner 4 via the cold water circulation pipe 26 passes through the pipes forming the evaporator 51 and the coil 71 to cool the cold water. It flows into the circulation pipe 25. During heating, the evaporator 51 functions as a condenser and the condenser 53 functions as an evaporator. The functions of the evaporator and the condenser are reversed during cooling and heating.

The cold water that has flowed into the evaporator 51 via the cold water circulation pipe 26 undergoes heat exchange in the evaporator 51, and then flows into the coil 71 through the cold water circulation pipe 73. Specifically, the cold water that has flowed into the evaporator 51 exchanges heat with the refrigerant that circulates through the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54. The cold water passing through the pipe forming the coil 71 flows into the cold water circulating pipe 25 after heat exchange with the outside air passing through the air supply passage 43. When the temperature of the outside air passing through the coil 71 is higher than the temperature of the cold water passing through the pipe forming the coil 71, the outside air is dehumidified when the outside air passes through the coil 71. The condensed water at the time of dehumidification is discharged to the exhaust path 44. When the refrigerant flows into the coil 72 via the refrigerant pipes 74 and 75, the refrigerant circulates through the evaporator 51, the compressor 52, the condenser 53, the expansion valve 54 and the coil 72. The refrigerant passing through the coil 72 exchanges heat with the outside air passing through the air supply passage 43.

As shown in FIG. 6, the coils 71 and 72 are arranged in the air supply path 43. Therefore, after the temperature and humidity of the outside air passing through the air supply path 43 is adjusted using the cold water passing through the pipes that form the coil 71, the temperature of the outside air passing through the air supply path 43 is adjusted using the refrigerant passing through the coil 72. Can be done again. When air conditioning is performed in the air conditioner system 1, the outside air passing through the coil 71 is cooled by cold water passing through the pipes forming the coil 71. Cold water passing through the pipe forming the coil 71 flows from the evaporator 51. When the outside air that passes through the coil 71 is cooled by the cold water that passes through the pipes that form the coil 71, the temperature of the outside air that passes through the coil 71 becomes a considerably low temperature, and air is supplied to living rooms such as the office 2 and the conference room 3. It is not preferable as the temperature of outside air. By raising the temperature of the outside air passing through the coil 72 by the refrigerant (hot gas) passing through the coil 72, it is possible to adjust the temperature of the outside air supplied to the living room such as the office 2 or the conference room 3 to an appropriate temperature. ..

According to the air conditioning system 1 of the second embodiment, the cold water that circulates in the office room 2, the conference room 3, the air conditioner 4, and the like is subjected to heat exchange in the evaporator 51, and then flows into the pipe that forms the coil 71. Pass through. The cold water passing through the pipe forming the coil 71 exchanges heat with the outside air passing through the air supply path 43. Thereby, the cold water used for individual air conditioning can be maintained at an appropriate temperature. Therefore, according to the air conditioning system 1 of the second embodiment, individual air conditioning can be realized without complicating the device configuration of the entire air conditioning system.

<Third Embodiment>
The air conditioning system 1 according to the third embodiment will be described. FIG. 7: is a figure which shows schematic structure of the air conditioning system 1 which concerns on 3rd Embodiment. As shown in FIG. 7, the air conditioning system 1 according to the third embodiment is different from the air conditioning system 1 according to the first embodiment in the installation position of the air conditioner 4. Except for the installation position of the air conditioner 4, the configuration of the air conditioning system 1 according to the third embodiment is the same as the configuration of the air conditioning system 1 according to the first embodiment. In the third embodiment, the same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

As shown in FIG. 7, the air conditioning system 1 includes an air conditioner 4, and the air conditioner 4 is installed in the space 14 behind the ceiling. The air conditioner 4 is installed in a supply/exhaust path for ventilation. The configuration of the air conditioner 4 shown in FIG. 7 may be the same as the configuration of the air conditioner 4 included in the air conditioning system 1 according to the first embodiment, or the air conditioner 4 included in the air conditioning system 1 according to the second embodiment. The configuration may be the same. Outside air is taken into the air conditioner 4 through the air supply duct 21 connected to the air conditioner 4. The air supply duct 22 connected to the air conditioner 4 is installed in the space 14 above the ceiling, and the air supply duct 22 is connected to the plurality of outlets 15 provided in the ceilings 11 and 12. Outside air is supplied into the office room 2 and the conference room 3 through the outlets 15 provided on the ceilings 11 and 12.

The air in the office room 2 and the air in the conference room 3 return to the space 14 behind the ceiling via the return air openings 16 provided in the ceilings 11 and 12. Ventilation of the office room 2 and the conference room 3 is performed via the air outlet 15 and the return air opening 16 provided on the ceilings 11 and 12. Exhaust gas is taken into the air conditioner 4 from the space 14 above the ceiling via the exhaust duct 23 connected to the air conditioner 4. Exhaust gas is exhausted from the air conditioner 4 via an exhaust duct 24 connected to the air conditioner 4. According to the air conditioning system 1 according to the third embodiment, the air conditioner 4 can be installed in the space 14 above the ceiling, and individual air conditioning can be realized without complicating the device configuration of the entire air conditioning system. You can

<Fourth Embodiment>
The air conditioning system 1 according to the fourth embodiment will be described. FIG. 8: is a figure which shows schematic structure of the air conditioning system 1 which concerns on 4th Embodiment. FIG. 9 is a configuration diagram of the air conditioner 4 according to the fourth embodiment. As shown in FIGS. 8 and 9, the air conditioning system 1 according to the fourth embodiment has an air-cooling chiller 81 between the air conditioner 4 and the chilled water pump 27 as compared with the air conditioning system 1 according to the first embodiment. It is installed, and the difference is that the air conditioner 4 does not include the heat pump heat source device 45. Other configurations in the air conditioning system 1 according to the fourth embodiment are the same as the configurations of the air conditioning system 1 according to the first embodiment. In the fourth embodiment, the same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

The air-cooled chiller 81 includes an evaporator, a compressor, a condenser, an expansion valve and a fan. The air-cooled chiller 81 is a heat source device such as a refrigerator. The cold water circulation pipe 26 is connected to the air cooling chiller 81. By driving the cold water pump 27, cold water flows from the air conditioner 4 into the cold water circulation pipe 25, and at the same time, the cold water returns from the cold water circulation pipe 26 through the air cooling chiller 81 to the air conditioner 4. The cold water flowing into the air-cooling chiller 81 through the cold-water circulating pipe 26 is heat-exchanged by the evaporator of the air-cooling chiller 81, and then passes through the cold-water circulating pipe 82 provided between the air conditioner 4 and the air-cooling chiller 81. It flows into the coil 46. Specifically, the cold water that has flowed into the evaporator of the air-cooled chiller 81 exchanges heat with the refrigerant circulating through the evaporator, the compressor, the condenser, and the expansion valve of the air-cooled chiller 81. The other configuration of the air conditioner 4 shown in FIG. 9 is the same as the configuration of the air conditioner 4 included in the air conditioning system 1 according to the first embodiment.

Like the air conditioning system 1 according to the second embodiment, the air conditioner 4 according to the fourth embodiment may include the coil 72 arranged in the air supply path 43 and the refrigerant pipes 74 and 75. In this case, the refrigerant circulating through the evaporator, compressor, condenser and expansion valve of the air-cooled chiller 81 flows into the coil 72 via the refrigerant pipes 74 and 75. Thereby, the temperature of the outside air passing through the air supply path 43 can be adjusted again by using the refrigerant passing through the coil 72. Further, like the air conditioning system 1 according to the third embodiment, the air conditioner 4 may be installed in the space 14 above the ceiling.

According to the air conditioning system 1 of the fourth embodiment, it is possible to separate the air conditioner 4 from the heat source device by using the air-cooling chiller 81 instead of the heat pump heat source device 45. Therefore, according to the air conditioning system 1 of the fourth embodiment, it is possible to install an evaporator that exchanges heat with cold water outside the air conditioner 4, and to complicate the device configuration of the entire air conditioning system. Individual air conditioning can be realized without using it.

<First Modification>
In the air conditioning system 1 according to each of the above-described embodiments, an example in which the space above the ceiling of the office room 2 and the space above the ceiling of the conference room 3 are connected to form a single space 14, is shown in FIG. The ceiling of the office room 2 and the ceiling of the conference room 3 do not have to be connected. FIG. 10: is a figure which shows schematic structure of the air conditioning system 1 which concerns on a modification. In the air conditioning system 1 shown in FIG. 10, a wall 91 is provided between the ceiling of the office room 2 and the ceiling of the meeting room 3, and a space 92 is provided between the ceiling 11 of the office room 2 and the ceiling slab 13. Is provided, and a space 93 is provided between the ceiling 12 and the ceiling slab 13 of the conference room 3.

As shown in FIG. 10, the air supply duct 22 connected to the air conditioner 4 is drawn into the space 92 behind the ceiling of the office room 2, and the air supply ducts are provided to the plurality of outlets 15 provided in the ceiling 11. 22 are connected. Although not shown in FIG. 10, the air supply duct 22 connected to the air conditioner 4 is drawn into the space 93 above the ceiling of the conference room 3 to supply air to the air outlet 15 provided in the ceiling 12. The duct 22 is connected. Exhaust gas is taken into the air conditioner 4 from the space 92 above the ceiling of the office room 2 via the exhaust duct 23 connected to the air conditioner 4. Although not shown in FIG. 10, exhaust air is taken into the air conditioner 4 from the space 93 behind the ceiling of the conference room 3 via the exhaust duct 23 connected to the air conditioner 4. Further, like the air conditioning system 1 according to the third embodiment, the air conditioner 4 may be installed in the space 92 above the ceiling of the office room 2, or the air conditioner 4 may be installed in the space 93 above the ceiling of the conference room 3. May be installed. The present invention is not limited to these, and the modification and each embodiment may be combined as much as possible.

<Second Modification>
In the air conditioning system 1 according to each of the above-described embodiments and the first modification, basically, the cold water that has exchanged heat with the outside air passing through the air supply path 43 passes through the cold water circulation pipe 25 to the task air conditioning desk 31 and the fan coil units 31, 34. Was being supplied. However, in the air conditioning system 1, other cold water that exchanges heat with the cold water that has exchanged heat with the outside air passing through the air supply path 43 may be supplied to the task air conditioning desk 31 and the fan coil units 31 and 34. Further, in the description of the air conditioning system 1 according to each of the above-described embodiments and the first modification, the flow control of the cold water or the refrigerant by the flow rate adjusting valve or the like is not mentioned, but the air conditioning system 1 is arranged at an appropriate location. The flow rate of the cold water or the refrigerant may be adjusted by a flow rate adjusting valve or the like.

FIG. 11 is a configuration diagram of an air conditioner according to the second modification. As shown in FIG. 11, in the air conditioner 4 according to the second modification, as compared with the air conditioner 4 according to the above-described embodiment, the cold water circulation pipe 26 is connected to the heat exchanger HX instead of the evaporator 51, The cold water in the cold water circulation pipe 26 that has passed through the heat exchanger HX flows into the cold water circulation pipe 25. The cold water that exchanges heat with the cold water in the cold water circulation pipes 25 and 26 in the heat exchanger HX is the cold water that has passed through the coil 71 from the evaporator 51 through the cold water circulation pipe 73, and after passing through the heat exchanger HX. Is pumped up by the pump P and sent again to the evaporator 51. In the circulation path from the evaporator 51 to the evaporator 51 via the cold water circulation pipe 73, the coil 71, the heat exchanger HX, and the pump P, the valve VA installed on the outlet side of the coil 71 and the bypass path of the coil 71 are provided. The valve VB installed, the valve VC installed on the outlet side of the heat exchanger HX, and the valve VD installed on the bypass path of the heat exchanger HX are provided. Each of the valves VA, VB, VC, VD is an electric flow rate adjusting valve, and the opening degree of the valve is adjusted according to a control signal from a control device (not shown).

When performing cooling in the air conditioning system 1, the valve VA adjusts the opening of the valve so that the temperature of the outside air that has passed through the coil 71 is, for example, 12° C., and when performing heating in the air conditioning system 1, The opening of the valve is adjusted so that the temperature of the outside air that has passed through the humidifier on the downstream side of the coil 72 becomes, for example, 23°C. The valve VB operates in the opposite direction to the valve VA to suppress fluctuations in the flow rate of the circulation path due to the opening/closing operation of the valve VA. When the outside air temperature is high and the load is heavy in the summer when cooling is performed, the valve VA is controlled to open and the valve VB is controlled to close, thereby increasing the amount of cold water that is the refrigerant water flowing through the coil 71. When the outside air temperature is low in the summer, the valve VA is controlled to be closed and the valve VB is controlled to be opened, so that the cold water as the refrigerant water flowing through the coil 71 is reduced. On the other hand, in the winter when heating is performed, when the outside air temperature is low and the load is large, the valve VA is controlled in the opening direction and the valve VB is controlled in the closing direction, thereby increasing the hot water flowing through the coil 71. When the outside air temperature is high in winter, the valve VA is controlled to be closed and the valve VB is controlled to be opened, so that the hot water flowing through the coil 71 is reduced.

When performing cooling in the air conditioning system 1, the valve VC adjusts the opening degree of the valve so that the temperature of the chilled water flowing from the heat exchanger HX to the chilled water circulation pipe 25 becomes, for example, 16° C., and the air conditioning system 1 performs heating. When performing the above, the opening degree of the valve is adjusted so that the temperature of the cold water (cold hot water) flowing from the heat exchanger HX to the cold water circulation pipe 25 becomes 40° C., for example. The valve VD suppresses the flow rate fluctuation of the circulation path due to the opening/closing operation of the valve VC by operating in reverse to the valve VC.

Further, in the second modified example, the refrigerant pipe 74 is provided with the valve VE. The valve VE is an electric flow rate adjusting valve, and adjusts the opening of the valve according to a control signal from a control device (not shown). The valve VE adjusts the opening degree of the valve so that the temperature of the outside air passing through the coil 72 becomes, for example, 19°C.

In the second modified example, when the heat pump heat source device 45 performs cooling in the air conditioning system 1, the expansion valve so that the temperature of the chilled water in the chilled water circulation pipe 73 flowing from the evaporator 51 to the coil 71 becomes 9° C., for example. When the opening degree of 54 and the power of the compressor 52 are adjusted and heating is performed in the air conditioning system 1, the cold water (cold water) flowing from the evaporator 51 (condenser) to the coil 71 in the cold water circulation pipe 73 is cooled. The opening degree of the expansion valve 54 and the power adjustment of the compressor 52 are adjusted so that the temperature becomes 47° C., for example. By operating the heat pump heat source device 45 in this way, proper temperature control is realized by adjusting the opening degrees of the valves VA, VB, VC, VD.

According to the second modification, even if the heat load changes during cooling or heating, the temperature and humidity of the room can be changed by adjusting the opening of each valve VA, VB, VC, VD, and VE. Will be suppressed. That is, it is possible to control the supply of the refrigerant water when the load such as the outside air temperature being high in the summer or low in the winter is large, or when the outside temperature is low in the summer or being high in the winter. .. Although the heat exchanger HX is illustrated in the air conditioner 4 in FIG. 11, the heat exchanger HX may be installed outside the air conditioner 4.

The cold water used for the air conditioning system 1 may be ordinary miscellaneous water, brine, water infused with a chemical solution, or various other types of water. Since ordinary miscellaneous water can be easily obtained, it is easy to replenish the reduced amount due to minute leakage or air diffusion. For example, it is possible to circulate CFCs as a heat transport medium, but it is easy to gasify and temperature control is difficult. Therefore, a valve device for controlling the pressure (supply amount) of CFCs is required in the second air conditioner, and the second air conditioner and the heat source side device that supplies CFCs must be connected by some communication means. .. Further, unless the lower limit of the evaporating temperature of CFCs can be controlled, there is a risk of dew condensation (dehumidification) in the second air conditioner (indoor unit), so it is necessary to install a drain pan and drain drain pipe, and as shown in FIGS. It becomes difficult to install a simple air conditioner (simple fan coil) as shown in. On the other hand, water is a heat-transporting medium with good controllability, and in order to keep the temperature to be supplied constant, there is no need to install a device (valve, etc.) that controls the amount of water supplied even when it is supplied to the second air conditioner. Also, it is possible to control the air within a certain range. Furthermore, since high-temperature cold water of 16° C. is used, there is no concern about dew condensation on the cold water pipe, and heat insulation is unnecessary. In particular, if the piping behind the ceiling is not heat-insulated, the air around the piping will be cooled in the ceiling, but the heat in the room on the secondary side (for example, office room 2) will be absorbed in the ceiling. There is no need to worry about energy loss because you will be returned to the office 2 after doing this. In particular, when using the air conditioner 4 behind the ceiling as shown in FIG.
It is particularly useful in a system that does not want to perform complicated control, such as the present air conditioning system 1. In addition, water has no effect on the environment, and it is possible to easily manufacture and supply required cold/hot water for each room. Therefore, there is an advantage that a so-called multi-system can be easily realized. Can be held by

1 Air Conditioning System 2 Office Room 3 Conference Room 4 Air Conditioner 11, 12 Ceiling 13 Ceiling Slab 14, 92, 93 Space 15 Outlet 16 Return Air Port 21, 23 Air Supply Duct 22, 24 Exhaust Duct 25, 26, 61, 62 , 63, 64, 73 cold water circulation pipe 27 cold water pump 31 task air conditioning desk 32 task spaces 33, 34, fan coil unit 41 air supply fan 42 exhaust fan 43 air supply path 44 exhaust path 45 heat pump heat source machines 46, 47, 48, 71, 72 Coil 51 Evaporator 52 Compressor 53 Condenser 54 Expansion valve 74, 75 Refrigerant piping 81 Air-cooled chiller 311, 331, 341 Fan 312, 332, 342 Coil 313 Suction port 314, 333, 343 Blowout port P Pump VA, VB, VC, VD, VE valve HX heat exchanger

Claims (8)

A first air conditioner that is installed in the air supply/exhaust path for ventilation and that air-conditions the outside air that supplies air to the living room,
A second air conditioner that is installed in the living room and takes in air from the living room to air-condition;
The first air conditioner,
A heat source machine having a condenser arranged in a path through which exhaust gas from the living room passes;
The first coil is arranged in a path through which the outside air for supplying air to the living room passes, and has a first coil through which cold water heat-exchanged by the evaporator of the heat source machine passes,
The second air conditioner has a second coil through which cold water that has passed through the first coil or another cold water that has exchanged heat with the cold water passes.
Air conditioning system. The first air conditioner has a third coil through which a refrigerant circulating in the condenser and the evaporator passes,
The third coil is arranged in a path through which the outside air that supplies air to the living room passes.
The air conditioning system according to claim 1. The first air conditioner is installed in a space above the ceiling of the living room,
The air conditioning system according to claim 1. A first air conditioner that is installed in the air supply/exhaust path for ventilation and that air-conditions the outside air that supplies air to the living room,
A second air conditioner that is installed in the living room and takes in air from the living room to air-condition;
A heat source machine having a condenser and an evaporator;
Equipped with
The first air conditioner is arranged in a path through which the outside air for supplying air to the living room passes, and has a first coil through which cold water heat-exchanged by the evaporator passes,
The second air conditioner has a second coil through which cold water that has passed through the first coil or another cold water that has exchanged heat with the cold water passes.
Air conditioning system. The first air conditioner has a third coil through which a refrigerant circulating in the condenser and the evaporator passes,
The third coil is arranged in a path through which the outside air that supplies air to the living room passes.
The air conditioning system according to claim 4. The first air conditioner is installed in a space above the ceiling of the living room,
The air conditioning system according to claim 4. A first air conditioner that is installed in the air supply/exhaust path for ventilation and that air-conditions the outside air that supplies air to the living room,
A second air conditioner that is installed in the living room and takes in air from the living room to air-condition;
The first air conditioner,
A heat source machine having an evaporator arranged in a path through which exhaust air from the living room passes,
It is arranged in a path through which the outside air for supplying air to the living room passes, and has a first coil through which hot water that has undergone heat exchange in the condenser of the heat source device passes,
The second air conditioner has a second coil through which the hot water that has passed through the first coil or another hot water that has exchanged heat with the hot water passes.
Air conditioning system. A first air conditioner that is installed in the air supply/exhaust path for ventilation and that air-conditions the outside air that supplies air to the living room,
A second air conditioner that is installed in the living room and takes in air from the living room to air-condition;
The first air conditioner,
A heat pump heat source device having a first heat exchanger arranged in a path through which exhaust air from the living room passes;
The first coil is arranged in a path through which the outside air for supplying air to the living room passes, and has a first coil through which refrigerant water heat-exchanged by the second heat exchanger of the heat pump heat source machine passes,
The second air conditioner has a second coil through which the refrigerant water that has passed through the first coil or another refrigerant water that has exchanged heat with the refrigerant water passes.
Air conditioning system.

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