JP2020176831A - Air conditioner for air supply/exhaust path and air conditioning system - Google Patents

Abstract

To provide a technology that realizes individual air conditioning without complicating a device configuration of an entire air conditioning system.SOLUTION: An air conditioning system includes: a first air conditioner which is installed at an air supply/exhaust path for ventilation and performs air conditioning of outer air to be supplied to a habitable room; and a second air conditioner which is installed at the habitable room and takes air of the habitable room thereinto to perform air conditioning of the air. The first air conditioner has: a heat source machine having a first heat exchanger disposed at a path through which exhaust air from the habitable room passes; and a first coil which is disposed at a path through which the outer air to be supplied to the habitable room passes, and through which refrigerant water that has been subjected to heat exchange by the second heat exchanger of the 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 different refrigerant water that has been subjected to heat exchange with the refrigerant water passes.SELECTED DRAWING: Figure 1

Description

The present invention relates to an air conditioning system.

With the saving of energy in lighting and OA (Office Automation) equipment and the improvement of heat insulation performance of buildings, the load of air conditioning required for heating and cooling offices is steadily decreasing. In addition, the temperature at which a person feels comfortable differs from person to person. For this reason, in recent years, the idea of air-conditioning the entire room has been reviewed. For example, Patent Document 1 discloses a technique for individually air-conditioning.

JP-A-2009-156510 Japanese Unexamined Patent Publication No. 2010-97027 Japanese Unexamined Patent Publication No. 09-229507

However, if individual air conditioning is to be realized with air from the ducts drawn from the air conditioning machine room of the building, the cooling and heating heat to reach the desired temperature for each person will be transported by air, so liquids such as water will be used. There is more waste in the power of heat transportation than in the case of transportation. Therefore, it is conceivable to realize individual air conditioning by using a refrigerator that cools liquids such as water, but since a certain amount of ventilation is required in the indoor space where people are, omitting the route to take in outside air into the room is omitted. difficult.

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

Therefore, an object of the present application is to provide a technique for realizing individual air conditioning without complicating the equipment configuration of the entire air conditioning system.

In order to solve the above problems, 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 supplied to the living room and the air in the living room. The first air conditioner is provided with a second air conditioner that takes in and air-conditions, and the first air conditioner is arranged in a heat source machine having a condenser arranged in a path through which exhaust from the living room passes and a path through which outside air supplying air to the living room passes. The second air conditioner has a first coil through which cold water heat-exchanged by the evaporator of the heat source machine passes, and the second air conditioner has cold water passing through the first coil or other cold water having heat exchanged with the cold water. It has a second coil through. According to the above-mentioned 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 equipment 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 supplied to the living room passes. Good. Further, in the above air conditioning system, the first air conditioner may be installed in the space behind the ceiling of the living room.

In addition, 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 that air-conditions the outside air supplied to the living room and in the living room, and takes in the air in the living room to air-condition. A second air conditioner and a heat source machine having a condenser and an evaporator are provided. The first air conditioner is arranged in a path through which the outside air supplied to the living room passes, and cold water heat exchanged by the evaporator is provided. The second air conditioner has a first coil through which the cold water passes through the first coil or another cold water that has exchanged heat with the cold water. According to the above-mentioned 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 equipment 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 supplied to the living room passes. Good. Further, in the above air conditioning system, the first air conditioner may be installed in the space behind the ceiling of the living room.

In addition, 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 that air-conditions the outside air supplied to the living room and in the living room, and takes in the air in the living room to air-condition. A second air conditioner is provided, and the first air conditioner is arranged in a heat source machine having an evaporator arranged in a path through which exhaust air from the living room passes, and in a path through which outside air supplying air to the living room passes, and is a heat source. The second air conditioner has a first coil through which hot water exchanged by the condenser of the machine passes, and a second air conditioner passes through a second coil through which hot water passed through the first coil or other hot water exchanged 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 equipment configuration of the entire air conditioning system.

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 that air-conditions the outside air supplied to the living room, and is installed in the living room to take in the air in the living room and air-condition it. A second air conditioner is provided, and the first air conditioner is arranged in a heat pump heat source machine having a first heat exchanger arranged in a path through which exhaust from the living room passes, and in a path through which the outside air supplied to the living room passes. The second air conditioner has a first coil through which the refrigerant water exchanged by the second heat exchanger of the heat pump heat source machine passes, and the second air conditioner has heat with the refrigerant water or the refrigerant water passing through the first coil. It has a second coil through which the other exchanged refrigerant water passes. According to the above air conditioning system, the refrigerant water used for air conditioning of the second air conditioner can be maintained at an appropriate temperature, and the equipment configuration of the entire air conditioning system is not complicated, and 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 equipment 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 configuration diagram of a 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 the air conditioner according to the second embodiment. FIG. 7 is a diagram showing a schematic configuration of an air conditioning system according to a third embodiment. FIG. 8 is a diagram showing a schematic configuration of an air conditioning system according to a fourth embodiment. FIG. 9 is a configuration diagram of the air conditioner according to the fourth embodiment. FIG. 10 is a diagram showing a schematic configuration of an air conditioning system according to the first modification. FIG. 11 is a configuration diagram of the air conditioner according to the second modification.

Hereinafter, the air conditioning system according to each embodiment will be described with reference to the drawings. The configuration of each of the following embodiments is an example, and the air conditioning system of the present application is not limited to the configuration of each embodiment. Moreover, you may combine the configurations of each embodiment as much as possible. The numerical notations 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 air-conditions the target space (harmonized room), and for example, adjusts the temperature, humidity, and cleanliness of the air in the room. 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 target spaces. The office room 2 and the conference 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 air 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 the air supply / exhaust path for ventilation. The air conditioner 4 air-conditions the outside air supplied to the living rooms such as the office room 2 and the conference room 3. The air conditioner 4 is an example of the 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 behind the ceiling, and the air supply duct 22 is connected to a plurality of air outlets 15 provided in the ceilings 11 and 12. Outside air is supplied to the office room 2 and the conference room 3 through the air 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 through 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 through the air outlet 15 and the return air port 16 provided on the ceilings 11 and 12. Exhaust gas is taken into the air conditioner 4 from the space 14 behind the ceiling via the exhaust duct 23 connected to the air conditioner 4. Exhaust gas is discharged from the air conditioner 4 through the exhaust duct 24 connected to the air conditioner 4.

In the air conditioning system 1, cold water circulates in the office room 2, the conference room 3, the air conditioner 4, and the like. In the first embodiment, since the case where the air conditioner system 1 is used for cooling is described, cold water circulates in the office room 2, the meeting room 3, the air conditioner 4, etc., but the air conditioner system 1 is used for heating. When doing so, hot water circulates in the office room 2, the meeting 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 conditioner system 1, cold and hot water circulates in the office room 2, the conference room 3, the air conditioner 4, and the like. Therefore, in each embodiment, when the air conditioner system 1 performs heating and cooling, cold water may be read as cold and hot water. The air conditioning system 1 includes cold water circulation pipes 25 and 26. The chilled water circulation pipe 25 is branched and connected to the air conditioner 4, and the chilled water circulation pipe 26 is connected to the air conditioner 4. A chilled water pump 27 is provided in the chilled water circulation pipe 26. When the chilled water pump 27 is driven, chilled water flows from the air conditioner 4 into the chilled water circulation pipe 25, and the chilled water returns from the chilled 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 behind the ceiling. By driving the exhaust fan 42, exhaust gas is taken into the air conditioner 4 from the space 14 behind the ceiling via the exhaust duct 23. The exhaust gas taken into the air conditioner 4 passes through the exhaust path 44, and the exhaust gas is discharged from the air conditioner 4 through the exhaust duct 24.

The air conditioner 4 includes a heat pump heat source machine 45 and coils 46 to 48. An air-conditioning refrigerator may be used instead of the heat pump heat source machine 45. The coils 46 to 48 are heat exchangers that exchange heat between cold water and air passing through the pipes constituting 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 machine 45 includes an evaporator 51, a compressor 52, a condenser 53, and an expansion valve 54. The evaporator 51 and the condenser 53 are heat exchangers. Refrigerant circulates in the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54. The heat pump heat source machine 45 is arranged in the exhaust path 44. When cooling is performed by the air conditioner system 1, when the refrigerant sent to the condenser 53 is condensed, heat exchange is performed between the exhaust gas passing through the exhaust path 44 and the refrigerant sent to the condenser 53. Since the refrigerant is cooled by the exhaust gas passing through the exhaust path 44, it is preferable that the temperature of the exhaust gas passing through the exhaust path 44 is low. When cooling is performed by the air conditioner system 1, the temperature of the exhaust taken into the air conditioner 4 through 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 machine 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 chilled water circulation pipe 26 passes through the pipes constituting the evaporator 51 and the coils 46 to 48. , Flows 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 chilled water that has flowed into the evaporator 51 through the chilled water circulation pipe 26 flows into the coil 46 through the chilled water circulation pipe 61 after heat exchange is performed in the evaporator 51. Specifically, the cold water that has flowed into the evaporator 51 exchanges heat with the refrigerant that circulates in the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54. The cold water passing through the pipes constituting the coil 46 flows into the chilled water circulation pipe 25 through the chilled water circulation pipe 62 after heat exchange with the outside air passing through the air supply path 43, and also flows into the chilled water circulation pipe 63. It flows into the coil 47 through 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 pipes constituting 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 pipes constituting the coil 47 flows into the coil 48 through the cold water circulation pipe 64 after heat exchange with the exhaust gas passing through the exhaust path 44. The cold water passing through the pipes constituting the coil 48 flows into the cold water circulation pipe 25 after heat exchange with the outside air passing through the air supply path 43. The coils 46 and 48 are examples of the first coil.

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

A plurality of task air-conditioning desks 31 are installed in the office room 2, and the space in which the task air-conditioning desks 31 are installed serves as 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 the second air conditioner. The task air conditioning desk 31 has a fan 311, a coil 312, a suction port 313, and an outlet 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 passing through the pipes constituting the coil 312. The coil 312 is an example of the second coil.

When the fan 311 is driven, the air in the task space 32 is sucked from the suction port 313, and the air heat-exchanged with the cold water by the coil 312 is blown out from the air outlet 314. Cold water circulation pipes 25 and 26 are connected to the coil 312. Cold water is supplied from the chilled water circulation pipe 25 to the coil 312, and the chilled water that has passed through the pipes constituting the coil 312 returns to the chilled water circulation pipe 26. Therefore, the cold water that has flowed into the chilled water circulation pipe 25 from the air conditioner 4 passes through the coil 312, and the chilled water that has passed through the pipes constituting the coil 312 returns to the air conditioner 4 via the chilled 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 the 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 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 heat-exchanged with the cold water by the coil 332 is blown out from the outlet 333. Cold water circulation pipes 25 and 26 are connected to the coil 332. Cold water is supplied from the chilled water circulation pipe 25 to the coil 332, and the chilled water that has passed through the pipes constituting the coil 332 returns to the chilled water circulation pipe 26. Therefore, the cold water that has flowed into the chilled water circulation pipe 25 from the air conditioner 4 passes through the coil 332, and the chilled water that has passed through the pipes constituting the coil 332 returns to the air conditioner 4 via the chilled 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 the second air conditioner. FIG. 5 is a configuration diagram of a 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 the second coil.

When the fan 341 is driven, air is taken in from the fan 341, and the air heat-exchanged with the cold water by the coil 342 is blown out from the outlet 343. Cold water circulation pipes 25 and 26 are connected to the coil 342. Cold water is supplied from the chilled water circulation pipe 25 to the coil 342, and the chilled water that has passed through the pipes constituting the coil 342 returns to the chilled water circulation pipe 26. Therefore, the cold water that has flowed into the chilled water circulation pipe 25 from the air conditioner 4 passes through the coil 342, and the chilled water that has passed through the pipes constituting the coil 342 returns to the air conditioner 4 via the chilled 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 by the evaporator 51. The cold water passing through the pipes constituting the coils 46 and 48 exchanges heat with the outside air passing through the air supply path 43, and the cold water passing through the pipes forming the coil 47 is exchanged with the exhaust gas passing through the exhaust path 44. Heat exchange takes place at. As a result, the cold water used for individual air conditioning can be maintained at an appropriate temperature. Therefore, according to the air conditioning system 1 according to the first embodiment, individual air conditioning can be realized without complicating the equipment 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 heat exchange is performed by the evaporator 51 is 11 ° C., the cold water having a temperature of 11 ° C. is used for individual air conditioning. It is necessary to adjust the temperature of cold water 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 pipes constituting the coil 46, and thus is between the cold water and the outside air passing through the air supply path 43. Since the heat exchange is performed in the above, the temperature of the cold water after passing through the pipes constituting the coil 46 is higher than the temperature of the cold water after the heat exchange is performed in the evaporator 51. For example, when the temperature of the cold water after passing through the pipes constituting the coil 46 is 16 ° C., heat exchange between the cold water at 16 ° C. and the air sucked from the suction port 313 by the coil 312 in the air conditioning desk 31. Is performed, and air at 20 ° C. is supplied from the 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 hot water to an appropriate temperature with 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 living rooms such as the office room 2 and the conference room 3, and heating the cold water or cooling the hot water with an individual air conditioner. To adjust the temperature to an appropriate temperature, it is necessary to separately install a heater and a cooler in the individual air conditioner. Further, since the air conditioner 4 supplies cold water having a low temperature to the living rooms such as the office room 2 and the conference room 3, there is a high possibility that dew condensation will occur in the living rooms such as the office room 2 and the conference room 3. By supplying cold water or hot water at an appropriate temperature from the air conditioner 4 to the living rooms such as the office room 2 and the conference room 3, it is not necessary to separately install a heater or a cooler in the individual air conditioner, and the office room 2 or the conference room 2 or the conference room. Condensation can be suppressed in the living room such as the room 3.

<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 has a different configuration of the air conditioner 4 as compared with the air conditioning system 1 according to the first embodiment. Regarding the points other than 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 passing through the air supply path 43 are adjusted by using the refrigerant circulating 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 machine 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 constituting the coil 71. The coil 71 is an example of the first coil. The coil 72 is a heat exchanger that exchanges heat between the refrigerant passing through the coil 72 and air. The coil 72 is an example of the 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 machine 45 includes an evaporator 51, a compressor 52, a condenser 53, and an expansion valve 54. The heat pump heat source machine 45 is arranged in the exhaust path 44. When cooling is performed by the air conditioner system 1, when the refrigerant sent to the condenser 53 is condensed, heat exchange is performed between the exhaust gas passing through the exhaust path 44 and the refrigerant sent to the condenser 53. Since the refrigerant is cooled by the exhaust gas passing through the exhaust path 44, it is preferable that the temperature of the exhaust gas passing through the exhaust path 44 is low. When cooling is performed by the air conditioner system 1, the temperature of the exhaust taken into the air conditioner 4 through 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 machine 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 constituting the evaporator 51 and the coil 71 and is 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 chilled water that has flowed into the evaporator 51 through the chilled water circulation pipe 26 flows into the coil 71 through the chilled water circulation pipe 73 after heat exchange is performed in the evaporator 51. Specifically, the cold water that has flowed into the evaporator 51 exchanges heat with the refrigerant that circulates in the evaporator 51, the compressor 52, the condenser 53, and the expansion valve 54. The cold water passing through the pipes constituting the coil 71 flows into the cold water circulation pipe 25 after heat exchange with the outside air passing through the air supply path 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 pipes constituting 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. As the refrigerant flows into the coil 72 via the refrigerant pipes 74 and 75, the refrigerant circulates in 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 path 43.

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

According to the air conditioning system 1 according to the second embodiment, the cold water circulating in the office room 2, the conference room 3, the air conditioner 4, etc. is heat-exchanged by the evaporator 51, and then the pipes constituting the coil 71 are installed. Pass. The cold water passing through the pipes constituting the coil 71 exchanges heat with the outside air passing through the air supply path 43. As a result, the cold water used for individual air conditioning can be maintained at an appropriate temperature. Therefore, according to the air conditioning system 1 according to the second embodiment, individual air conditioning can be realized without complicating the equipment 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 diagram showing a schematic configuration of the air conditioning system 1 according to the third 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. 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, except for the installation position of the air conditioner 4. 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 a space 14 behind the ceiling. The air conditioner 4 is installed in the air 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 configuration of the air conditioner 4 included in the air conditioning system 1 according to the second embodiment. It may be the same as the configuration of. 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 behind the ceiling, and the air supply duct 22 is connected to a plurality of air outlets 15 provided in the ceilings 11 and 12. Outside air is supplied to the office room 2 and the conference room 3 through the air 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 through 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 through the air outlet 15 and the return air port 16 provided on the ceilings 11 and 12. Exhaust gas is taken into the air conditioner 4 from the space 14 behind the ceiling via the exhaust duct 23 connected to the air conditioner 4. Exhaust gas is discharged from the air conditioner 4 through the 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 behind the ceiling, and individual air conditioning can be realized without complicating the equipment configuration of the entire air conditioning system. Can be done.

<Fourth Embodiment>
The air conditioning system 1 according to the fourth embodiment will be described. FIG. 8 is a diagram showing a schematic configuration of the air conditioning system 1 according to the fourth embodiment. FIG. 9 is a configuration diagram of the air conditioner 4 according to the fourth embodiment. As shown in FIGS. 8 and 9, in the air conditioning system 1 according to the fourth embodiment, an air cooling chiller 81 is provided between the air conditioner 4 and the chilled water pump 27 as compared with the air conditioning system 1 according to the first embodiment. The difference is that the air conditioner 4 is not provided with the heat pump heat source unit 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 machine such as a refrigerator. The chilled water circulation pipe 26 is connected to the air-cooled chiller 81. When the chilled water pump 27 is driven, chilled water flows from the air conditioner 4 into the chilled water circulation pipe 25, and the chilled water returns from the chilled water circulation pipe 26 through the air-cooled chiller 81 to the air conditioner 4. The chilled water that has flowed into the air-cooled chiller 81 via the chilled water circulation pipe 26 is heat-exchanged by the evaporator of the air-cooled chiller 81, and then passes through the chilled water circulation pipe 82 provided between the air conditioner 4 and the air-cooled chiller 81. It flows into the coil 46. Specifically, the cold water flowing into the evaporator of the air-cooled chiller 81 undergoes heat exchange with the refrigerant circulating in the evaporator, compressor, condenser and expansion valve of the air-cooled chiller 81. Other configurations of the air conditioner 4 shown in FIG. 9 are 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 a coil 72 arranged in the air supply path 43 and refrigerant pipes 74 and 75. In this case, the refrigerant circulating in 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. As a result, 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, the air conditioner 4 may be installed in the space 14 behind the ceiling as in the air conditioning system 1 according to the third embodiment.

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

<First modification>
In the air conditioning system 1 according to each of the above embodiments, an example is shown in which the attic of the office room 2 and the attic of the conference room 3 are connected to form one space 14, but as shown in FIG. , The attic of the office 2 and the attic of the conference room 3 do not have to be connected. FIG. 10 is a diagram showing a schematic configuration of an air conditioning system 1 according to a modified example. In the air conditioning system 1 shown in FIG. 10, a wall 91 is provided between the ceiling of the office 2 and the ceiling of the conference room 3, and a space 92 is provided between the ceiling 11 of the office 2 and the ceiling slab 13. Is provided, and a space 93 is provided between the ceiling 12 of the conference room 3 and the ceiling slab 13.

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

<Second modification>
In the air conditioning system 1 according to each of the above embodiments and the first modification, the cold water that has exchanged heat with the outside air that basically passes 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 and 34. It 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, although the description of the air conditioning system 1 according to each of the above embodiments and the first modification does not mention the flow rate control of cold water or the refrigerant by the flow rate adjusting valve or the like, the air conditioning system 1 is arranged at an appropriate place. The flow rate of cold water or refrigerant may be adjusted by a flow rate adjusting valve or the like.

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

The valve VA adjusts the opening degree of the valve so that the temperature of the outside air passing through the coil 71 becomes, for example, 12 ° C. when cooling is performed by the air conditioning system 1, and when heating is performed by the air conditioning system 1. The opening degree of the valve is adjusted so that the temperature of the outside air passing through the humidifier on the downstream side of the coil 72 is, for example, 23 ° C. The valve VB operates in the reverse manner to the valve VA to suppress fluctuations in the flow rate of the circulation path accompanying the opening / closing operation of the valve VA. In the summer when cooling is performed, when the outside air temperature is high and the load is large, the amount of cold water, which is the refrigerant water flowing through the coil 71, is increased by controlling the valve VA in the opening direction and the valve VB in the closing direction. When the outside air temperature is low in summer, the amount of cold water, which is the refrigerant water flowing through the coil 71, is reduced by controlling the valve VA in the closing direction and the valve VB in the opening direction. On the other hand, in winter when heating is performed, when the outside air temperature is low and the load is large, the amount of hot water flowing through the coil 71 is increased by controlling the valve VA in the opening direction and the valve VB in the closing direction. When the outside air temperature is high in winter, the amount of hot water flowing through the coil 71 is reduced by controlling the valve VA in the closing direction and the valve VB in the opening direction.

When cooling is performed by the air conditioning system 1, the valve VC adjusts the opening degree of the valve so that the temperature of the cold water flowing from the heat exchanger HX to the chilled water circulation pipe 25 is, for example, 16 ° C., and the valve VC is heated by the air conditioning system 1. In this case, 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 is, for example, 40 ° C. By operating the valve VD in the opposite direction to the valve VC, the flow rate fluctuation of the circulation path accompanying the opening / closing operation of the valve VC is suppressed.

Further, in the second modification, the refrigerant pipe 74 is provided with a valve VE. The valve VE is an electric flow rate adjusting valve, and adjusts the opening degree 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 is, for example, 19 ° C.

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

According to this second modification, even if the heat load fluctuates during cooling or heating, the temperature and humidity in the room can fluctuate by adjusting the opening degree of each valve VA, VB, VC, VD, VE. Will be suppressed. That is, the supply of the refrigerant water can be controlled in response to a large load such as high outside air temperature in summer or low in winter, or a small load such as low outside air temperature in summer or high in winter. .. Although the heat exchanger HX is shown inside the air conditioner 4 in FIG. 11, the heat exchanger HX may be installed outside the air conditioner 4.

The cold water used in 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 amount of reduction due to minute leakage or diffusion. For example, it is conceivable to circulate CFCs as a heat transport medium, but it is easy to gasify and temperature control is difficult. For this reason, a valve device that always controls the pressure (supply amount) of CFCs is required in the second air conditioner, and the second air conditioner and the equipment on the heat source side that supplies CFCs must be connected by some communication means. .. In addition, unless the lower limit of the evaporation temperature of CFCs can be controlled, there is a concern about dew condensation (dehumidification) on the second air conditioner (indoor unit), so it is necessary to install a drain pan and a drain drain pipe, and FIGS. 3 and 4 It becomes difficult to install a simple air conditioner (simple fan coil) as shown in. On the other hand, water is a heat transport medium with good controllability, and in order to keep the supplied temperature constant, it is not necessary to install a device (valve, etc.) that controls the amount of water supplied even when it is supplied to the second air conditioner. The air can be controlled within the range assumed to some extent. Furthermore, since high-temperature cold water at 16 ° C. is used, there is no concern about dew condensation on the cold water pipe and no heat insulation is required. 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 secondary room (for example, office 2) will be absorbed in the ceiling. You don't have to worry about energy loss because you will be returned to the office 2. In particular, when the air conditioner 4 is arranged behind the ceiling as shown in FIG. 7, it is possible to use water as a refrigerant.
It is particularly useful in a system such as the air conditioning system 1 that does not want to perform complicated control. In addition, water has no impact on the environment, and the necessary cold and hot water can be easily produced and supplied for each room. Therefore, the air conditioning system 1 has the advantage that a so-called multi-system can be easily realized. Can be held in.

1 Air conditioner system 2 Office room 3 Meeting room 4 Air conditioner 11, 12 Ceiling 13 Ceiling slab 14, 92, 93 Space 15 Air outlet 16 Return air port 21, 23 Air supply duct 22, 24 Exhaust duct 25, 26, 61, 62 , 63, 64, 73 Cold water circulation piping 27 Cold water pump 31 Task air conditioning desk 32 Task space 33, 34, Fan coil unit 41 Air supply fan 42 Exhaust fan 43 Air supply path 44 Exhaust path 45 Heat pump heat source machine 46, 47, 48, 71, 72 Coil 51 Evaporator 52 Compressor 53 Condenser 54 Expansion valve 74, 75 Refrigerant piping 81 Air cooling chiller 311, 331, 341 Fan 312, 332, 342 Coil 313 Suction port 314, 333, 343 Outlet P pump VA, VB, VC, VD, VE valve HX heat exchanger

Claims (8)

The first air conditioner, which is installed in the air supply / exhaust path for ventilation and air-conditions the outside air supplied to the living room,
It is equipped with a second air conditioner that is installed in the living room and takes in the air of the living room to air-condition it.
The first air conditioner is
A heat source machine having a condenser arranged in the path through which the exhaust from the living room passes, and
It is arranged in a path through which the outside air supplied to the living room passes, and has a first coil through which the 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 passing through the first coil or other cold water having heat exchanged with the cold water passes.
Air conditioning system. The first air conditioner has a third coil through which the 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 the space behind the ceiling of the living room.
The air conditioning system according to claim 1 or 2. The first air conditioner, which is installed in the air supply / exhaust path for ventilation and air-conditions the outside air supplied to the living room,
A second air conditioner installed in the living room that takes in the air from the living room and air-conditions it.
A heat source machine with a condenser and an evaporator,
With
The first air conditioner is arranged in a path through which the outside air 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 passing through the first coil or other cold water having heat exchanged with the cold water passes.
Air conditioning system. The first air conditioner has a third coil through which the 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 the space behind the ceiling of the living room.
The air conditioning system according to claim 4 or 5. The first air conditioner, which is installed in the air supply / exhaust path for ventilation and air-conditions the outside air supplied to the living room,
It is equipped with a second air conditioner that is installed in the living room and takes in the air of the living room to air-condition it.
The first air conditioner is
A heat source machine having an evaporator arranged in a path through which exhaust gas from the living room passes, and
It is arranged in a path through which the outside air supplied to the living room passes, and has a first coil through which hot water exchanged with heat by the condenser of the heat source machine passes.
The second air conditioner has a second coil through which hot water passing through the first coil or other hot water having heat exchanged with the hot water passes.
Air conditioning system. The first air conditioner, which is installed in the air supply / exhaust path for ventilation and air-conditions the outside air supplied to the living room,
It is equipped with a second air conditioner that is installed in the living room and takes in the air of the living room to air-condition it.
The first air conditioner is
A heat pump heat source machine having a first heat exchanger arranged in a path through which exhaust gas from the living room passes, and
It is arranged in a path through which the outside air supplied to the living room passes, and has a first coil through which the 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 passing through the first coil or other refrigerant water having heat exchanged with the refrigerant water passes.
Air conditioning system.

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