JP2004340529A - Energy saving type air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy saving type air conditioning system capable of efficiently dehumidifying outside air in a cooling mode, and capable of efficiently humidifying the outside air in a heating mode. <P>SOLUTION: In the energy saving type air conditioning system 41, a supply chamber 23 of an air conditioner 43 is connected to a blowout opening 27 of a room 13 to be air-conditioned, a return chamber 45 of the air conditioner 43 is connected to a return air opening 15 of the room 13 to be air-conditioned, and the return chamber 45 of the air conditioner 43 is connected to an outside air intake 19. In the air conditioner 43, the return chamber 45 is composed of a first chamber 47 and a second chamber 49 arranged in parallel with each other, the return air opening 15 is connected to the first chamber 47 and a heat exchanger 51 for return air is internally provided in the first chamber 47, the outside air intake 19 is connected to the second chamber 49 and a heat exchanger 53 for return air and a humidifier 7 are internally provided in the second chamber 49 in a flow direction of air, and downstream ends of the first chamber 47 and the second chamber 49 are connected to the supply chamber 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an energy-saving air-conditioning system using cold water, hot water, or a refrigerant as a heat medium, and more particularly to an improved technology capable of efficiently dehumidifying outside air in a cooling mode and efficiently humidifying outside air in a heating mode.
[0002]
[Prior art]
For example, an air conditioning system using cold water, hot water, or a refrigerant as a heat medium blows air in a state suitable for indoor sensible heat load and latent heat load by connecting the air-conditioned room and the air conditioner integrally or separately. are doing. FIG. 7 is a system diagram of this type of conventional air conditioning system, and FIGS. 8 and 9 show changes in the state of air on a psychrometric chart during cooling and heating in the conventional air conditioning system. The air conditioner 1 is provided with a filter 3, a cooling / heating coil 5, a humidifier 7, and a blower 9 in order from the upstream side to the downstream side in the air flow direction. The return air opening 15 of the room to be air-conditioned 13 is connected via an air return duct 17 to the upstream of the return chamber 11 containing the filter 3, and the external air intake 19 is connected via an external air intake duct 21. Connected. On the other hand, a downstream portion of the supply chamber 23 in which the humidifier 7 and the blower 9 are built is connected to an air outlet 27 of the room 13 to be air-conditioned via a blower duct 25. In FIG. 7, 28 is a volume damper, 29 is an outside air amount control damper, 31 is an exhaust suction port in the air-conditioned room 13, 33 is a blower, and 35 is an exhaust port.
[0003]
In the air conditioning system configured as described above, at the time of cooling, as shown in FIG. 8, the outside air in the O state is mixed with the return air in the R state to become the A state, and is cooled by the cooling / heating coil 5 to the B state. Then, the air is blown to the air-conditioned room 13 to be in the R state, and the return air in the R state is mixed with the outside air in the O state again to be in the A state, and the state changes in the same manner as described above. Further, at the time of heating, as shown in FIG. 9, the outside air in the O state is mixed with the return air in the R state to be in the A state, is heated by the cooling / heating coil 5 to be in the B state, and is humidified by the humidifier 7. After being in the C state, the air is blown into the air-conditioned room 13 to be in the R state, and the return air in the R state is mixed with the outside air in the O state again to be in the A state, and the state changes in the same manner as described above.
[0004]
As described above, according to the conventional air conditioning system, during cooling, after the outside air and the return air are mixed in the return chamber 11, cooling and dehumidification are performed on the entire amount of the blown air, and the total amount of the blown air is heated. Is heated and humidified to blow air in a state suitable for the sensible heat load and the latent heat load in the air-conditioned room 13 to perform air conditioning.
[0005]
Prior art document information related to the invention of this application includes the following.
[Non-patent document 1]
Akio Orihara and 3 others, "Air Conditioning Equipment of Shinjuku NS Building", Air Conditioning and Sanitary Engineering, December 1984, Vol. 58, No. 12, p. 27-44
[0006]
[Problems to be solved by the invention]
However, in the conventional air-conditioning system, in the cooling mode shown in FIG. 8, since the chilled water coil is controlled by the indoor dry bulb temperature, the relative humidity becomes high. For example, as shown by the dotted line in FIG. When the sensible heat load decreases and the blowout temperature difference decreases, the indoor relative humidity increases due to insufficient dehumidification, and the comfort decreases.
Further, in the heating mode shown in FIG. 9, humidification is performed after heating including the latent heat load of humidification by the hot water coil. Therefore, when the indoor heating load is sufficient, the dry bulb temperature at the humidifier inlet is also high, and the humidifier is in a state where it can easily exhibit its capacity, and the indoor relative humidity can be controlled to the set value. When the humidifier becomes smaller, the dry bulb temperature at the humidifier inlet becomes lower, as indicated by the dotted line in the figure, so that the humidifier has a lower humidifying capacity and lower indoor relative humidity.
[0007]
On the other hand, Non-Patent Document 1 discloses a function-sharing air conditioning system including an external air conditioner and a distributed air conditioner (terminal air conditioner). Here, the outside air conditioner basically shares the processing of the heat load of the outside air, as well as the processing of the indoor humidity control and the processing of the slight indoor sensible heat load. In addition, the terminal air conditioner shares indoor sensible heat load processing. According to this air conditioning system, for example, since the dehumidifier is shared by the external controller, dehumidification reheating does not occur, and the heat consumption of the cooling coil between the external controller and the terminal air conditioner is reduced by the heat consumption of the single duct system. Compared to the amount, it was possible to save a lot. However, this air conditioning system consists of a separate air conditioner and a terminal air conditioner, and the air conditioners are installed in four layers in each direction of north, south, east, west, east, west, and so on. In addition to the difficulty in establishing operation, humidity control for each individual system became unstable, and it became difficult to ensure safety in disaster prevention by making each floor an independent system.
[0008]
The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide an energy-saving air-conditioning system that can efficiently dehumidify outside air in a cooling mode and efficiently humidify outside air in a heating mode. An object of the present invention is to improve the energy saving in the cooling mode and the humidification capacity in the heating mode. A second object of the present invention is to provide an energy-saving air-conditioning system which can easily establish an individual operation, can secure the stability of humidity control for each individual system, and can ensure safety of disaster prevention by an independent system on each floor. It is in.
[0009]
[Means for Solving the Problems]
The energy-saving air conditioning system according to claim 1, wherein the supply chamber of the air conditioner is connected to an outlet of a room to be air-conditioned, and the return chamber of the air conditioner is connected to the room to be air-conditioned. While connected to the return air port of the air conditioner, an external air intake is connected to the return chamber of the air conditioner, sensible heat load in the room to be air-conditioned, air in a state adapted to the latent heat load is blown from the air conditioner, An energy-saving air-conditioning system that keeps the temperature and humidity in a room to be air-conditioned constant, wherein the air conditioner comprises the return chamber including two parallel first and second chambers, and the first chamber includes the first chamber and the second chamber. A return air port is connected, a heat exchanger for return air is installed inside, the outside air intake port is connected to the second chamber, and the heat exchanger for outside air and the humidifier are connected in the flow direction of air. And the downstream ends of the first chamber and the second chamber are connected to the supply chamber.
[0010]
In this energy-saving air conditioning system, in the cooling mode, high-humidity outside air is cooled and dehumidified by the outside air heat exchanger, and the room relative humidity is controlled to be maintained at the set value. Further, the return air is cooled by the return air heat exchanger, and the conditioned air mixed with the cooled and dehumidified outside air is controlled to maintain the indoor air temperature at the set value.
On the other hand, in the heating mode, the low-humidity outside air is heated by the outside-air heat exchanger, the heated outside air is humidified by the humidifier, and the room relative humidity is controlled to be maintained at the set value. The return air is heated by the return air heat exchanger, and the conditioned air mixed with the humidified outside air is controlled to maintain the indoor air temperature at the set value.
As a result, in the cooling mode, the outside air is efficiently dehumidified, indoor air having a lower humidity than that of the conventional system is obtained, and a comfortable thermal sensation is obtained even at a higher temperature than the conventional system. Also, in the case of a constant temperature and constant humidity system, the reheat load is greatly reduced as compared with the conventional system. In the heating mode, the outside air is efficiently humidified, and the state in which the room air humidity does not reach the set value because the conventional system cannot sufficiently humidify is avoided.
Further, in contrast to a conventional air conditioning system including a separate air conditioner and a terminal air conditioner, a return chamber is defined by a first chamber and a second chamber, and a return air port is connected to the first chamber. Since the heat exchanger for return air is installed inside, the outside air inlet is connected to the second chamber, and the heat exchanger for outside air and the humidifier are installed inside, so that the local air conditioning with the above-mentioned effects can be obtained. Can be realized in a distributed manner.
[0011]
The energy-saving air conditioning system according to claim 2, wherein a supply chamber of the air conditioner is connected to an outlet of the room to be air-conditioned, and a return chamber of the air conditioner is connected to a return port of the room to be air-conditioned, and the air conditioning is performed. Connecting the outside air intake to the return chamber of the air conditioner, blowing air from the air conditioner in a state adapted to the sensible heat load and the latent heat load in the air conditioned room to save the temperature and humidity in the air conditioned room at a constant level. An air conditioner, wherein the air conditioner comprises the return chamber composed of two parallel first and second chambers, and the first chamber is connected to the return air port, and the second chamber The outside air intake is connected to the outside air heat exchanger and the humidifier are installed in the direction of air flow, and the downstream ends of the first chamber and the second chamber are subjected to main heat exchange. Through the vessel is characterized in that connected to the supply chamber.
[0012]
In this energy-saving air conditioning system, in the cooling mode, high-humidity outside air is cooled and dehumidified by the outside air heat exchanger, and the room relative humidity is controlled to be maintained at the set value. Further, the conditioned air obtained by mixing the cooled and dehumidified outside air and the return air is controlled by the main heat exchanger to maintain the room air temperature at a set value.
On the other hand, in the heating mode, after the low-humidity outside air is heated by the outside-air heat exchanger, it is humidified by the humidifier, and the temperature-humidity-adjusted outside air is mixed with the return air. The main heat exchanger is controlled to maintain the set value. Therefore, also in this energy saving type air conditioning system, in the cooling mode, the outside air is efficiently dehumidified, and in the heating mode, the outside air is efficiently humidified, and the same operation as the operation of the configuration according to claim 1 is obtained. Can be
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of an energy-saving air-conditioning system according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a system configuration diagram illustrating a first embodiment of an energy-saving air conditioning system according to the present invention, and FIG. 2 is a diagram illustrating a state change of air on a psychrometric diagram during cooling according to the first embodiment. FIG. 3 and FIG. 3 are explanatory diagrams illustrating a change in the state of air on the psychrometric chart during heating according to the first embodiment. In each of the following embodiments, the same members as those shown in FIG. 7 will be described with the same reference numerals.
[0014]
In the energy-saving air conditioning system 41 according to the present embodiment, the air conditioner 43 has a return chamber 45 composed of two parallel first and second chambers 47 and 49. In this split chamber configuration, one return chamber may be partitioned to form a first chamber 47 and a second chamber 49, or a new second chamber 49 may be added to the first return chamber 47 which is an existing return chamber. May be added.
[0015]
The return air port 15 of the room to be air-conditioned 13 is connected to the first chamber 47 via the return air duct 17. The outside air inlet 19 is connected to the second chamber 49 via the outside air intake duct 21. A cooling / heating coil 51, which is a heat exchanger for return air, is provided in the first chamber 47, and the cooling / heating coil 51 exchanges heat with the return air introduced from the return air duct 17.
[0016]
A cooling / heating coil 53, which is a heat exchanger for outside air, is provided in the second chamber 49, and the cooling / heating coil 53 exchanges heat with the outside air introduced from the outside air intake duct 21. The humidifier 7 is provided downstream of the cooling / heating coil 53. The downstream ends of the first chamber 47 and the second chamber 49 are connected to the supply chamber 23.
[0017]
The first chamber 47 and the second chamber 49 are provided with filters 55 and 57 for removing dust from the return air and the outside air, respectively. The blower 9 is disposed in the supply chamber 23 of the air conditioner 43 as in the conventional case. In FIG. 1, reference numeral 28 denotes a volume damper, 29 denotes an outside air amount control damper, 31 denotes an exhaust suction port in the room to be air-conditioned 13, 33 denotes an exhaust fan, and 35 denotes an exhaust port.
[0018]
A heat source (not shown) is connected to the cooling / heating coils 51 and 53 via a heat medium pipe. As the heat source, for example, a boiler, a refrigerator heat storage, an electric heater, or the like can be used. Further, the coil may be of a direct expansion type, and the whole may be manufactured as a package type air conditioner.
[0019]
In the cooling mode, the energy-saving air-conditioning system 41 configured as described above is controlled so that the high-humidity outside air is cooled and dehumidified by the cooling / heating coil 53 to maintain the indoor relative humidity at the set value. Further, the return air is cooled by the cooling / heating coil 51, and the conditioned air mixed with the cooled and dehumidified outside air is controlled to maintain the indoor air temperature at the set value.
[0020]
On the other hand, in the heating mode, the low-humidity outside air is heated by the cooling / heating coil 53, the heated outside air is humidified by the humidifier 7, and the room relative humidity is controlled to be maintained at the set value. Further, the return air is heated by the cooling / heating coil 51, and the conditioned air mixed with the humidified outside air is controlled so as to maintain the indoor air temperature at a set value.
[0021]
This operation is described in more detail as shown in FIGS. 2 and FIG. 3 indicate the state of the air at the positions indicated by the same reference numerals in FIG. 1. That is, during cooling, as shown in FIG. 2, the outside air in the O state is cooled by the cooling / heating coil 53 to be in the A state. The return air in the R state is cooled by the cooling / heating coil 51 to the C state, and after mixing these to the D state, is sent to the air-conditioned room 13 to be in the R state. Is again cooled by the cooling / heating coil 51 to be in the C state, and thereafter changes state in the same manner as described above. Further, at the time of heating, as shown in FIG. 3, the outside air in the O state is heated by the cooling / heating coil 53 to be in the A state, and is humidified by the humidifier 7 to be in the B state. On the other hand, the return air is heated by the cooling / heating coil 51 to be in the C state, mixed with the outside air in the B state to be in the D state, and then sent to the air-conditioned room 13 to be in the R state. The air is again heated to the C state, mixes with the outside air in the B state, and changes state as described above.
[0022]
In the cooling mode, when the indoor heat load decreases, the state changes as indicated by the dotted line in FIG. 2 (A1, C1, D1, R1). The outside air also changes like O1 to A1, but since the dehumidification can be performed more reliably than in the conventional system, the indoor relative humidity is easily stabilized. In order to prevent the indoor sensible heat load from decreasing and the indoor air temperature from dropping below the target value, the cooling and dehumidification of the outside air is reduced by the indoor air temperature compensation control. In this case, although the room relative temperature becomes higher than the target value, the high humidity state of the conventional system hardly occurs. Further, if heating control is performed by the cooling / heating coil 51 on the return air side, constant temperature and constant humidity air conditioning can be achieved.
[0023]
In the heating mode, when the indoor heat load decreases, the heating of the cooling / heating coil 51 is controlled to change the points C and D in FIG. 3 so as to approach the point R (indoor air). Even if the heating of the cooling / heating coil 51 is stopped due to a significant decrease in the indoor heat load, the room air temperature can be prevented from rising due to the heating of the cooling / heating coil 53. Relieves warming. The case where the indoor heat load changes to the cooling side is indicated by reference numerals A1, B1, D1, and R1 in FIG. A case where the outside air state changes is indicated by A2. In this case, since the capacity of the humidifier 7 changes depending on the humidifier inlet air temperature A (A1, A2), it is necessary to select equipment so that the humidifying capacity can be ensured even when the indoor heat load during the heating period is the smallest.
[0024]
As a result, in the cooling mode, the outside air is efficiently dehumidified, indoor air having a lower humidity than that of the conventional system is obtained, and a comfortable thermal sensation is obtained even at a higher temperature than the conventional system. Also, in the case of a constant temperature and constant humidity system, the reheat load is greatly reduced as compared with the conventional system. In the heating mode, the outside air is efficiently humidified, and the state in which the room air humidity does not reach the set value because the conventional system cannot sufficiently humidify is avoided.
[0025]
Further, according to the energy-saving air conditioning system 41, the outside air and the return air are cooled by the individual cooling / heating coils 51 and 53 provided in the first chamber 47 and the second chamber 49, respectively. It is cooled only by a small amount and high humidity of outside air before being mixed with air, and efficient dehumidification becomes possible. That is, unlike the conventional case, the small amount and high humidity of the outside air are mixed with the return air, so that the large amount and low humidity of the air do not occur. For this reason, a large cooling load for removing moisture from a large amount of low-humidity air does not occur. As a result, the inefficient cooling load and reheating load conventionally generated for dehumidification are reduced, and a comfortable feeling of heat at a high temperature can be obtained, and the annual cooling load can be reduced.
[0026]
Further, with respect to the conventional air conditioning system including a separate air conditioner and a terminal air conditioner, a return chamber 45 is defined by a first chamber 47 and a second chamber 49, and the return air is returned to the first chamber 47. Since the cooling / heating coil 51 is connected to the port 15 and the outside air inlet 19 is connected to the second chamber 49 and the cooling / heating coil 53 and the humidifier 7 are provided, the above-described effects are obtained. The resulting local air conditioning can be realized in a distributed manner. As a result, the individual operation can be easily established, the stability of the humidity control for each individual system can be ensured, and an independent system for each floor can be provided, for example, without lowering the fire protection performance of the fire prevention compartment. The safety of disaster prevention will also be ensured.
[0027]
In a conventional air conditioning system including a separate air conditioner and a terminal air conditioner, both the air conditioner and the terminal air conditioner must be provided with a blower. For example, since the conditioned air from the first chamber 47 and the second chamber 49 can be transported by one blower 9, the equipment cost of the air transport system (blower, duct, damper, control auxiliary equipment, etc.) and the running controller can be reduced. It becomes possible.
[0028]
Next, a second embodiment of the energy saving air conditioning system according to the present invention will be described.
FIG. 4 is a system configuration diagram illustrating a second embodiment of an energy saving air conditioning system according to the present invention, and FIG. 5 is a diagram illustrating a state change of air on a psychrometric chart during cooling according to the second embodiment. FIG. 6 and FIG. 6 are explanatory diagrams showing a change in the state of air on the psychrometric chart during heating according to the second embodiment. The same members as those shown in FIG. 1 will be described with the same reference numerals.
[0029]
In the energy-saving air-conditioning system 61 according to the present embodiment, the air conditioner 63 includes the return chamber 45 including two parallel first and second chambers 47 and 49. The return air port 15 of the room to be air-conditioned 13 is connected to the first chamber 47 via the return air duct 17. The outside air inlet 19 is connected to the second chamber 49 via the outside air intake duct 21. Only the filter 55 is provided in the first chamber 47.
[0030]
A cooling / heating coil 53, which is a heat exchanger for outside air, is provided in the second chamber 49, and the cooling / heating coil 53 exchanges heat with the outside air introduced from the outside air intake duct 21. The humidifier 7 is provided downstream of the cooling / heating coil 53. The downstream ends of the first chamber 47 and the second chamber 49 are connected to the supply chamber 23 via a cooling / heating coil 65 which is a main heat exchanger.
[0031]
In this embodiment, after the outside air whose temperature and humidity has been adjusted by the cooling / heating coil 53 and the humidifier 7 is mixed with the return air, the cooling / heating coil 65 controls the room air temperature to be maintained at the set value. .
[0032]
In the energy-saving air-conditioning system 61 configured as described above, at the time of cooling, as shown in FIG. 5, the outside air in the O state is cooled by the cooling / heating coil 53 to the A state. The return air in the R state is mixed with the outside air in the A state to be in the C state, and then cooled by the cooling / heating coil 65 to be in the D state, and is sent to the air-conditioned room 13 to be in the R state. After the return air in the R state is mixed with the outside air in the A state again to be in the C state, it is cooled by the cooling / heating coil 65 to be in the D state, and the state changes in the same manner as described above. Further, at the time of heating, as shown in FIG. 6, the outside air in the O state is heated by the cooling / heating coil 53 to be in the A state, and is humidified by the humidifier 7 to be in the B state. On the other hand, the return air is mixed with the outside air in the B state to be in the C state, further heated to the D state by the cooling / heating coil 65, and then sent to the air-conditioned room 13 to be in the R state. Becomes the C state again, and changes the state in the same manner as described above.
[0033]
In the cooling mode, when the indoor heat load decreases, the state changes as indicated by the dotted line in FIG. 5 (D1, R1). However, since the dehumidification can be performed more reliably than in the conventional system, the indoor relative humidity is reduced. Easy to stabilize.
[0034]
In the heating mode, when the indoor heat load decreases, the heating of the cooling / heating coil 65 is controlled to change the point D in FIG. 6 so as to approach the point R (indoor air). The case where the indoor heat load changes to the cooling side is indicated by reference numerals A1, B1, and D1 in FIG.
[0035]
Therefore, in the energy-saving air conditioning system 61 as well, in the cooling mode, the outside air is efficiently dehumidified, and in the heating mode, the outside air is efficiently humidified. The operation and effect of the invention can be obtained.
[0036]
【The invention's effect】
As described above in detail, according to the energy-saving air conditioning system of the present invention, in the cooling mode, the outside air can be efficiently dehumidified. Even at higher temperatures, a comfortable thermal sensation can be obtained, resulting in energy savings. Also, in the case of a constant temperature and constant humidity system, the reheat load can be greatly reduced as compared with the conventional system, and energy saving is achieved. Further, in the heating mode, the outside air can be efficiently humidified, so that a state in which the room air humidity does not reach the set value because the conventional system cannot sufficiently humidify can be avoided. And. The set value of the indoor air humidity, which could not be achieved by the conventional system without steam humidification, can also be achieved by vaporization humidification. Further, the return chamber is composed of a first chamber and a second chamber, a return air port is connected to the first chamber, a heat exchanger for return air is installed therein, and an external air intake is connected to the second chamber. Since the external air heat exchanger and humidifier are installed internally, local air conditioning with the above-mentioned effects can be achieved in a distributed manner, and individual operation can be easily established. Stability can be secured, and the safety of disaster prevention by independent systems on each floor can also be secured.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram illustrating a first embodiment of an energy-saving air conditioning system according to the present invention.
FIG. 2 is an explanatory diagram illustrating a state change of air on a psychrometric chart during cooling according to the first embodiment.
FIG. 3 is an explanatory diagram illustrating a change in the state of air on an air line diagram during heating according to the first embodiment.
FIG. 4 is a system configuration diagram illustrating a second embodiment of an energy saving air conditioning system according to the present invention.
FIG. 5 is an explanatory diagram illustrating a state change of air on a psychrometric chart during cooling according to the second embodiment.
FIG. 6 is an explanatory diagram illustrating a state change of air on an air line diagram during heating according to the second embodiment.
FIG. 7 is a system configuration diagram showing a conventional air conditioning system.
8 is an explanatory diagram showing a change in the state of air on an air line diagram during cooling of the conventional system shown in FIG. 7;
FIG. 9 is an explanatory diagram showing a state change of air on an air line diagram during heating of the conventional system shown in FIG. 7;
[Explanation of symbols]
7 Humidifier, 13 Air-conditioned room, 15 Return air port, 19 Outdoor air intake, 43, 63 Air conditioner, 23 Supply chamber, 27 Air outlet, 41, 61 Energy-saving air conditioning system, 45 ... return chamber, 47 ... first chamber, 49 ... second chamber, 51 ... cooling / heating coil (heat exchanger for return air), 53 ... cooling / heating coil (heat exchanger for outside air), 65 ... cooling / heating Heating coil (main heat exchanger)

Claims (2)

Connecting the supply chamber of the air conditioner to the outlet of the room to be air-conditioned, connecting the return chamber of the air conditioner to the return air port of the room to be air-conditioned, and connecting the outside air intake to the return chamber of the air conditioner, A sensible heat load in the room to be air-conditioned, an air-conditioning system that blows air in a state adapted to the latent heat load from the air conditioner to keep the temperature and humidity in the room to be air-conditioned constant,
The air conditioner is
The return chamber is composed of two parallel first and second chambers,
Connecting the return air port to the first chamber and internally installing a heat exchanger for return air,
Connecting the outside air intake to the second chamber and installing a heat exchanger and a humidifier for outside air in the direction of air flow,
An energy-saving air conditioning system, wherein downstream ends of the first chamber and the second chamber are connected to the supply chamber. Connecting the supply chamber of the air conditioner to the outlet of the room to be air-conditioned, connecting the return chamber of the air conditioner to the return air port of the room to be air-conditioned, and connecting the outside air intake to the return chamber of the air conditioner, A sensible heat load in the room to be air-conditioned, an air-conditioning system that blows air in a state adapted to the latent heat load from the air conditioner to keep the temperature and humidity in the room to be air-conditioned constant,
The air conditioner is
The return chamber is composed of two parallel first and second chambers,
Connecting the return air port to the first chamber,
Connecting the outside air intake to the second chamber and installing a heat exchanger and a humidifier for outside air in the direction of air flow,
An energy-saving air conditioning system, wherein the downstream ends of the first chamber and the second chamber are connected to the supply chamber via a main heat exchanger.

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