JP2018146118A - Air Conditioning System - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system enabling simplification of instrumentation work while saving energy and easily maintained and managed.SOLUTION: An air conditioning system includes: an air conditioner (1) for supplying air-conditioning air to an air-conditioned space (S) for cooling or heating; an air conditioner control device (2) for controlling the air conditioner (1) to adjust the air-conditioning air to an air state suitable for cooling or heating; a heat source machine (5) for adjusting a supply water temperature of circulation water to be supplied to the air conditioner (1) to adjust the air state of the air-conditioning air; and a heat source machine control device (7) that is a control device independent of the air conditioner control device (2) and automatically variably adjusts the supply water temperature of the circulation water in accordance with fluctuation of outside air load.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system.

  An air conditioning system that uses circulating water for heat exchange as air conditioning energy is a heat source that adjusts the temperature of the circulating water and a heat exchanger through which the circulating water flows to adjust the supply temperature of the air conditioning air and It consists of an air conditioner that performs air conditioning and a water circulation device that circulates circulating water through the air conditioner and heat source. Circulating water that has absorbed or radiated heat from the air-conditioning air by the heat exchanger of the air conditioner and deviated from the set water temperature is adjusted to the set water temperature by being cooled or heated by the heat source device. And the energy-saving of the heat source machine is aimed at by the central control system which fluctuates the supply water temperature of a heat source machine according to the air-conditioning load of the air-conditioned space.

Japanese Patent Laying-Open No. 2006-85013

  Such a central control system requires sensors for measuring the air-conditioning load in the air-conditioned space and communication equipment between the control device for the heat source unit and the control unit for the air-conditioner, making the control complicated and instrumentation work, etc. The equipment cost is high. In addition, the air conditioner mixes outside air and return air, and then performs cooling, dehumidification, heating, and the like with a heat exchanger. In such an air conditioner, for example, in the case of a cooling operation in summer, the humidity of the supply air cannot be controlled unless it is reheated after cooling and dehumidification. For this reason, energy for reheating is required, and a four-pipe type facility that allows cold water and hot water to flow at the same time is required, resulting in an increase in equipment cost and operation cost. Further, when cooling operation is required even in winter, there is a problem that a four-pipe type equipment is required, and the equipment cost and the operation cost are increased.

  In order to solve the above-described problems, the present invention supplies an air-conditioning air to an air-conditioned space for cooling or heating, and controls the air-conditioning apparatus so that the air-conditioning air is suitable for the cooling or heating. An air conditioner control device that adjusts the air conditioner, a heat source device that adjusts the temperature of the circulating water supplied to the air conditioner for adjusting the air condition of the air conditioning air, and a control independent of the air conditioner control device The main feature is that the apparatus includes a heat source device control device that automatically variably adjusts the supply water temperature of the circulating water in accordance with a change in an outside air load.

  According to the first aspect of the present invention, the air conditioning load in the air-conditioned space usually fluctuates in proportion to the outdoor temperature and humidity, which is the outside air load. Therefore, it is predicted that the air conditioning load in the air-conditioned space is small when the outside air load is small. it can. Using this, if the temperature of the circulating water supplied to the air conditioner is raised in the summer and lowered in the winter, the energy consumed by the heat source machine can be reduced and energy can be saved. Since the control is completely separated and independent from the air conditioner side and the heat source side without using a complicated and costly central control system, the instrumentation work is simplified and maintenance management is facilitated.

  According to the invention of claim 2, since the supply water temperature of the circulating water is finely variably adjusted, the energy saving efficiency of the entire air conditioning system including the heat source device and the air conditioner is increased.

  According to the invention of claim 3, when the water temperature difference generated by the heat exchange by the air conditioner is out of the preset water temperature difference range, the energy of the circulating water supplied to the air conditioner is excessive or insufficient. Will be. Utilizing this, if the temperature difference range set in advance is exceeded, the water speed of the circulating water is increased, and if it is less than the water temperature difference range, the water speed of the circulating water is decreased to reduce or exceed the heat source output. Can be compensated. Even if the control is completely separated and independent from the air conditioner side and the heat source machine side, the energy supply from the heat source machine to the air conditioner can be stabilized, maintaining comfort and saving energy.

  According to the invention of claim 4, since the air-conditioning air supplied to the air conditioner is pre-cooled or pre-heated using the exhaust heat of the air-conditioned space, the air-conditioning load processed by the air-conditioner is reduced and energy is saved. Since the external air conditioner is a heat pump type, energy consumption efficiency is high and energy saving.

  According to the invention of claim 5, if the outside air that is air-conditioning air is cooled and dehumidified by the first heat exchanger, and the return air that is air-conditioning air is cooled without being dehumidified by the second heat exchanger, two pipes The reheat effect can be obtained by processing the outdoor air load (latent heat) and the indoor load (sensible heat) separately, and the reheat energy is saved. Since it is a two-pipe type, heat source equipment and circulating water piping facilities are simplified, saving energy and cost. Since the water temperature difference of the circulating water is expanded by performing the second treatment of the second heat exchanger with the circulating water after the first treatment of the first heat exchanger, the operating efficiency of the heat source machine is improved and the energy is saved. The air conditioning system can be simplified and the cost can be reduced by minimizing the lengths of the pipes constituting the first water channel and the bypass water channel, and the number of the first water amount adjusting valves and the second water amount adjusting valves.

  According to the invention of claim 6, if the air-conditioning load in the air-conditioned space is large, the operation is to perform both the first process and the second process, and if it is small, the operation is to perform only one of the first process and the second process. The control range for adjusting the air for air conditioning to an air state suitable for cooling or heating is expanded. Therefore, even if the air conditioning load and the outside air load in the air-conditioned space are unbalanced and the energy supply from the heat source device to the air conditioner is excessive or insufficient, stable air conditioning can be performed on the air-conditioned space.

  According to the invention of claim 7, since humidification is performed by two vaporizing humidifiers, humidification is not insufficient and a comfortable environment is obtained. It is energy saving because it can be cooled by using the vaporization cooling of the two vaporizing humidifiers without increasing the circulation of circulating water.

  According to the eighth and eleventh aspects of the present invention, even if a temperature difference occurs due to the direction of the air-conditioned space in winter, the two-pipe system can be freely switched between heating and outdoor air cooling to improve comfort. Since it is a two-pipe type, heat source equipment and circulating water piping facilities are simplified, saving energy and cost. Since it is humidified with a steam humidifier, it becomes a comfortable environment without dampening.

  According to the ninth aspect of the present invention, it is possible to save energy by increasing the air volume of the process having the smaller enthalpy required for cooling or heating the air conditioning air and reducing the air conditioning load. Therefore, even if the air conditioning load and the outside air load in the air-conditioned space are unbalanced and the energy supply from the heat source device to the air conditioner is excessive or insufficient, stable air conditioning can be performed on the air-conditioned space.

  According to the invention of claim 10, if the outside air that is air-conditioning air is cooled and dehumidified by the third heat exchanger, and the return air that is air-conditioning air is cooled without being dehumidified by the fourth heat exchanger, two pipes The reheat effect can be obtained by processing the outdoor air load (latent heat) and the indoor load (sensible heat) separately, and the reheat energy is saved. Since it is a two-pipe type, heat source equipment and circulating water piping facilities are simplified, saving energy and cost. The air conditioning system can be simplified and the cost can be reduced by minimizing the length of the pipes constituting the second water channel and the third water channel and the number of the third water amount adjusting valves. Even if there is a difference in temperature depending on the direction of the air-conditioned space, the second heat pump can freely switch between heating and cooling regardless of the temperature of the circulating water, so that air conditioning can be improved.

  1 to 7 show an air conditioning system according to the present invention. The air conditioning system includes an air conditioner 1, an air conditioner control device 2, an external air conditioner 3, an external air conditioner control device 4, a heat source device 5, and a water circulation device 6. And a heat source machine control device 7. The air-conditioned space S such as the interior of a building or a hall, the outdoors, the air conditioner 1 and the external air conditioner 3 are connected by a duct (not shown) to supply air (SA), outside air (OA), and return air ( RA) and exhaust (EA) are blown together. In each figure, the solid arrows indicate the airflow direction.

  The air conditioner 1 is configured to supply air-conditioning air to the air-conditioned space S for cooling or heating. The external air conditioner 3 is configured to precool or preheat the outside air and supply the air to the air conditioner 1 and exhaust the air in the air-conditioned space S to the outside. The air conditioner control device 2 is configured to control the air conditioner 1 in accordance with a change in the air conditioning load of the air-conditioned space S so as to adjust the air conditioning air to an air state (temperature and humidity) suitable for cooling or heating. .

  The heat source device 5 is configured to adjust the supply water temperature of the circulating water supplied to the air conditioner 1 in order to adjust the air state of the air for air conditioning. The water circulation device 6 includes a water circulation pipe 8 configured to circulate the circulating water with respect to the heat source unit 5 and the air conditioner 1, and a water feed pump 9 having a function of changing a water speed and a water supply amount of the circulating water in the water circulation pipe 8. And. The heat source device control device 7 is a control device that is independent from the air conditioner control device 2 and is configured to automatically variably adjust the supply water temperature of the circulating water in accordance with fluctuations in the outside air load.

  The heat source device control device 7 includes an outside air temperature / humidity detector 10 that detects the temperature and humidity of the outside air, a supply water temperature detector 11 that detects the supply water temperature of the circulating water to the air conditioner 1, and the heat source device 5 from the air conditioner 1. A return water temperature detector 12 that detects the return water temperature of the circulating water that has returned to, a water supply detector 13 that detects the water speed and amount of water in the water circulation pipe 8, a water supply control unit 14, a supply water temperature control unit 15, And a heat source device output compensation unit 16. The heat source machine control device 7 includes a microprocessor, various sensors, and other control devices.

  The water supply control unit 14 is configured to control the rotation speed of the water supply pump 9 to adjust the water speed and the water supply amount. The supply water temperature control unit 15 compares the preset outside air temperature and outside air humidity with the outside air temperature and outside air humidity detected by the outside air temperature / humidity detector 10. Depending on the result, when the air-conditioned space S is cooled, the supply water temperature of the circulating water that is automatically variably adjusted is 6-7 when the outside air is hot and humid with respect to the preset outside air temperature and outside air humidity. Set to 7 ° C when the outside air is low temperature and high humidity, set to 8 to 9 ° C when the outside air is high temperature and low humidity, and set to 9 to 10 ° C when the outside air is low temperature and low humidity . In this case, the preset outside air temperature and outside air humidity are, for example, a dry bulb temperature of 28 ° C. and an absolute humidity of 0.011 kg / kg (DA).

  The supply water temperature control unit 15 sets the supply water temperature of the circulating water that is automatically variably adjusted during heating of the air-conditioned space S to 34 to 36 ° C. when the outside air is hot relative to the preset outside air temperature. When the outside air is cold, the temperature is set to 39 to 41 ° C. In this case, the preset outside air temperature is, for example, a dry bulb temperature of 13 ° C. The above-mentioned supply water temperature and the preset outside air temperature and outside air humidity are merely examples, and the present invention is not limited to this, and the setting can be changed freely.

  The heat source unit output compensation unit 16 is configured to provide a water temperature difference between the circulating water generated by the supply to the air conditioner 1 (the circulating water supplied from the heat source unit 5 to the air conditioner 1 and the circulating water returned from the air conditioner 1 to the heat source unit 5). When the water temperature difference falls outside the preset water temperature difference range (for example, 6 to 10 ° C.), the water circulation device 6 is controlled to adjust the water speed of the circulating water so as to compensate for excess or deficiency of the heat source machine output. Configure. The water temperature difference of the circulating water is calculated from the water temperatures detected by the supply water temperature detector 11 and the return water temperature detector 12, and compared with a preset water temperature difference range. When the range of the preset water temperature difference is exceeded, the water speed and the water supply amount of the circulating water are increased, and when the water temperature difference is less than the range, the water speed and the water supply amount of the circulating water are decreased.

  As shown in FIG. 2, the external air conditioner 3 includes a first heat pump 20, a humidifier 21, a pair of blowers 22, a mixing damper 23, and a casing 24. The first heat pump 20 precools (cools) or preheats (heats) the outside air by exchanging heat between the outside air of the air-conditioning air and the air of the air-conditioned space S. The blower 22 supplies outside air to the air conditioner 1 and exhausts the air in the air-conditioned space S to the outside. The mixing damper 23 is configured to mix the air in the air-conditioned space S with the outside air before being cooled or heated by the first heat pump 20 and precool or preheat.

  The first heat pump 20 repeats the order of compression / condensation / expansion / evaporation with respect to the circulating refrigerant, and absorbs heat in the refrigerant evaporating process for the outside air and exhaust gas heat exchanged with the circulating refrigerant, and releases heat in the refrigerant condensing process. Depressurization of the seventh heat exchanger 25 and the eighth heat exchanger 27, the compressor 27, an expansion valve for expanding the circulating refrigerant, and the like, which are carried out and are different processes in the circulating refrigerant evaporation process and the condensation process. It comprises at least a mechanism 28 and a switching mechanism 29 such as a valve for switching the evaporation process and the condensation process of the seventh heat exchanger 25 and the eighth heat exchanger 27, and these are connected by piping so that the refrigerant circulates. To do.

  The first heat pump 20 is an air-cooled heat pump that uses exhaust (air in the air-conditioned space S) as an air heat source. The first heat pump 20 sends exhaust to the eighth heat exchanger 27 by the blower 22 and exchanges heat with the refrigerant. The first heat pump 20 is installed in the ceiling in a so-called indoor / outdoor integrated form. In the illustrated example, the first heat pump 20, the humidifier 21 and the blower 22 are provided in the casing 24, but the mixing damper 23 may also be provided in the casing 24.

  The external air conditioner control device 4a includes at least an air volume control unit 30, a humidification control unit 31, and a compressor control unit 32. The external air conditioner control device 4a includes a microprocessor, various sensors, and other control devices. The air volume control unit 30 is configured to control the rotation speed of the blower 22 and the damper opening degree of the mixing damper 23 to adjust the air volume of outside air, return air, and exhaust. The humidification control unit 31 is configured to control the humidifier 21 to adjust the humidification amount to the outside air. The compressor control unit 32 is configured to control the rotation speed of the compressor 27 to adjust the cooling or heating ability.

  FIG. 3 shows a first air conditioner 1 a among the plurality of air conditioners 1. The first air conditioner 1a includes a first heat exchanger 35, a second heat exchanger 36, a first water passage 37, a bypass water passage 38, a first water amount adjustment valve 39, a second water amount adjustment valve 40, and a first humidifier. 41, the 2nd humidifier 42, the 1st damper 43, the 2nd damper 44, the 3rd damper 45, the 1st air blower 46, and the casing 47 are provided. In the illustrated example, the first heat exchanger 35, the second heat exchanger 36, the first humidifier 41, the second humidifier 42, and the first blower 46 are provided in the casing 47, but the air conditioner control device 2a, second The first water passage 37, the bypass water passage 38, the first water amount adjustment valve 39, the second water amount adjustment valve 40, the first damper 43, the second damper 44, and the third damper 45 may also be provided in the casing 47.

  The 1st heat exchanger 35 is comprised so that the 1st process which cools or heats the external air of the air for air conditioning by distribution | circulation of circulating water may be performed. The second heat exchanger 36 is configured to perform a second process of cooling or heating the return air of the air-conditioning air by circulating the circulating water. The first water channel 37 is configured by providing a water pipe so that the circulating water flows through the first heat exchanger 35 and then flows through the second heat exchanger 36. The bypass water channel 38 is configured by providing a water pipe so as to branch off from the first water channel 37 and bypass the first treated circulating water without passing through the second heat exchanger 36.

  The first water amount adjustment valve 39 is constituted by a water amount proportional variation type two-way valve so as to adjust the capacity of the first treatment of the first heat exchanger 35 by changing the circulation amount of the circulating water before the first treatment. . The second water amount adjustment valve 40 is of a water amount proportional variation method so as to adjust the second treatment capacity of the second heat exchanger 36 by changing the distribution of the circulation amount of the circulating water in the first water passage 37 and the bypass water passage 38. Consists of a three-way valve. The second water amount adjusting valve 40 may be a three-way valve that switches so that the entire amount flows in one of the first water channel 37 and the bypass water channel 38 and the other does not flow.

  The first humidifier 41 is a vaporization type that humidifies the outside air of the air-conditioning air by vaporization and evaporation of water under the first heat exchanger 35. The second humidifier 42 is a vaporization type in which the return air of the air-conditioning air is humidified by vaporization and evaporation of water under the second heat exchanger 36. The first damper 43 increases or decreases the outside air amount of the air-conditioning air taken into the first air conditioner 1a. The second damper 44 and the third damper 45 increase / decrease the amount of return air of the air-conditioning air taken into the first air conditioner 1a. The first blower 46 increases or decreases the amount of air-conditioning air supplied to the air-conditioned space S. The outside air taken in from the first damper 43 and the return air taken in from the third damper 45 by the first blower 46 pass through the first heat exchanger 35, and the return air taken in from the second damper 44 is the first air The two heat exchangers 36 are mixed with each other and sent to the air-conditioned space S. The amount of outside air taken in from the first damper 43 is adjusted so that the carbon dioxide concentration in the air-conditioned space S falls within a preset range.

  As shown in FIG. 4, the first heat exchanger 35 is configured by inserting a group of heat transfer tubes 19 into a group of heat transfer plates 18 in the same manner as a general plate fin coil. Circulating water is caused to flow inside the heat transfer tube 19, and air conditioning air is brought into contact with the heat transfer tube 19 and the heat transfer plate 18 to exchange heat between the air conditioning air and the circulating water. Although the 2nd heat exchanger 36, the 7th heat exchanger 25, and the 8th heat exchanger 27 are constituted similarly to the 1st heat exchanger 35, the 7th heat exchanger 25 and the 8th heat exchanger 27 are the same. The refrigerant flows through the heat pipe 19 to exchange heat with air-conditioning air. Thereby, the air for air conditioning becomes cold air or warm air and is supplied to the air conditioner 1 and the air-conditioned space S.

  As shown in FIG. 3, the air conditioner control device 2a of the first air conditioner 1a includes an outside air temperature / humidity detector 50 that detects the temperature and humidity of the outside air, and a return air temperature / humidity detector that detects the temperature and humidity of the return air. 51, an air temperature / humidity detector 52 for detecting the temperature and humidity of the air supply of the air conditioner 1a, an air volume control unit 53, a water volume control unit 54, a humidification control unit 55, a first outside air cooling operation unit 56, and a first cooling capacity compensation Unit 57, first air conditioning capability compensation unit 58, and first air conditioning capability control unit 59. The air conditioner control device 2a includes a microprocessor, various sensors, and other control devices.

  The air volume control unit 53 determines the rotation speed of the first blower 46 of the air conditioner 1a, the damper opening of the first damper 43, the damper opening of the second damper 44, and the damper opening of the third damper 45. It controls and adjusts each air volume of outside air, return air, and supply air. The water amount control unit 54 controls the first water amount adjustment valve 39 and the second water amount adjustment valve 40 so as to adjust each circulation amount of the circulating water in the first heat exchanger 35 and the second heat exchanger 36. Configure. The humidification control unit 55 is configured to control the humidification water amounts of the first humidifier 41 and the second humidifier 42 to adjust the humidification amounts to the outside air and the return air.

  The first outside air cooling operation unit 56 uses the return air temperature / humidity detector 51 to detect the temperature of one or both of the air before the first process and the air before the second process detected by the outside air temperature / humidity detector 50. When the temperature of the air-conditioned space S detected is lower than the detected air-conditioned space S, the air-conditioned air space S is used to cool the air-conditioned space S. In this case, the air-conditioning air can be vaporized and cooled by one or both of the first humidifier 41 and the second humidifier 42 to reduce the cooling load. The first cooling capacity compensator 57 performs evaporative cooling by humidifying the return air with the second humidifier 42 after the first cooling process without dehumidification so as to reduce the cooling load of the first air conditioner 1a. Configure.

  The first air conditioning capability compensator 58 compares the first processing enthalpy required for the first processing with the second processing enthalpy required for the second processing, and increases the air volume of the air conditioning air for the processing with a small enthalpy. The first air conditioner 1a is configured to reduce the air conditioning load. Here, the first treatment enthalpy is the enthalpy required to cool or heat the outside air before the first treatment to a preset supply air temperature, and the second treatment enthalpy is the return air before the second treatment. Is the enthalpy required to cool or heat to a preset air supply temperature.

  For example, during the cooling operation, if the enthalpy during the first process is smaller than the enthalpy during the second process, the air volume of the air for the air conditioning taken into the air conditioner 1a is increased to reduce the air conditioning (cooling) load. The first processing enthalpy and the second processing enthalpy are calculated and compared from the temperatures and humidity detected by the outside air temperature / humidity detector 50, the return air temperature / humidity detector 51, and the supply air temperature / humidity detector 52. As a result, when the first processing enthalpy is smaller than the second processing enthalpy, the rotational speed of the first blower 46, the damper opening degree of the first damper 43, and the second so that the air volume of the outside air of the air-conditioning air increases. The damper opening degree of the damper 44 is adjusted as appropriate.

  The first air conditioning capability control unit 59 switches between an operation for performing both the first process and the second process and an operation for performing only one of the first process and the second process according to the size of the air conditioning load of the air-conditioned space S. The air conditioning space S is configured to adjust the capacity to cool or heat. If the air-conditioning load in the air-conditioned space S is large, the operation is to perform both the first process and the second process, and if it is small, the operation is to perform only one of the first process and the second process. For example, if the ability to cool or heat the air-conditioned space S is insufficient even when only the first process is performed, the lack of capacity is compensated by using the second process together.

  When the air conditioner 1a performs a cooling operation that requires dehumidification in the summer, the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the external air conditioner 3 exchange heat between the outside air and the exhaust air and perform precooling. The outside air is supplied to the air conditioner 1a. In the air conditioner 1a, a target supply air temperature is obtained by a reheat effect generated by cooling and dehumidifying the outside air with the first heat exchanger 35 and mixing with the return air cooled without being dehumidified with the second heat exchanger 36. And control to supply air humidity. Thereby, the air-conditioned space S is air-conditioned at a preset temperature and humidity. During the cooling operation without dehumidification of the outside air, the cooling operation is performed while evaporating and cooling the air-conditioning air by one or both of the first humidifier 41 and the second humidifier 42 to save energy.

  When heating operation is performed in the winter season, preheated outside air is supplied to the air conditioner 1a by exchanging heat between the outside air and the exhaust by the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the external air conditioner 3. . In the air conditioner 1a, the outside air is heated by the first heat exchanger 35, the return air is heated by the second heat exchanger 36, humidified by the first humidifier 41 and the second humidifier 42, and mixed. Control the temperature and humidity of the supply air. Precooling or preheating by mixing the air in the air-conditioned space S with the outside air before being cooled or heated by the first heat pump 20 by the mixing damper 23 of the external air conditioner 3 during the above-described cooling operation and heating operation. To do. Note that the air conditioner 1a may perform the cooling operation or the heating operation without precooling or preheating the outside air with the external air conditioner 3.

  When the circulating water is cooled with warm water during the winter season, outside air having a temperature lower than the temperature of the air-conditioned space S is supplied from the external air conditioner 3 to the air conditioner 1a. The outside air is heated to a temperature suitable for cooling by the first heat exchanger 35, and the return air is heated by the second heat exchanger 36 or not, and the first humidifier 41 and the second humidifier 42 are left as they are. Is supplied to the air-conditioned space S.

  FIG. 5 shows another embodiment of the air conditioner 1a of FIG. This air conditioner 1a is a steam-type third that humidifies air-conditioning air with steam under one or both of the first heat exchanger 35 and the second heat exchanger 36 (first heat exchanger 35 in the illustrated example). A humidifier 48 is provided. The first air conditioner control device 2a is configured so that the temperature of one or both of the air before the first treatment and the air before the second treatment detected by the outside air temperature / humidity detector 50 is the return air temperature / humidity detector 51. When the temperature of the air-conditioned space S is lower than the temperature of the air-conditioned space S detected in step 2, the air-conditioning air is used to cool the air-conditioned space S. The other configuration is the same as that of the embodiment of FIG.

  When this air conditioner 1a performs a cooling operation in winter, outside air having a temperature lower than the temperature of the air-conditioned space S is supplied from the external air conditioner 3 to the air conditioner 1a. The outside air is heated to a temperature suitable for cooling by the first heat exchanger 35 and steam humidified by the third humidifier 48, and the return air is heated by the second heat exchanger 36 or without being heated. Supply to space S.

  FIG. 6 shows a second air conditioner 1 b among the plurality of air conditioners 1. The second air conditioner 1b includes a third heat exchanger 62, a second heat pump 65 having a fourth heat exchanger 63 and a fifth heat exchanger 64, a second water channel 66, a third water channel 67, and a third water amount adjustment. The valve 68, the 4th humidifier 69, the 4th damper 71, the 5th damper 72, the 6th damper 73, the 2nd air blower 74, and the casing 75 are provided. In the illustrated example, the third heat exchanger 62, the second heat pump 65, the fourth humidifier 69, the fifth humidifier 97, and the second blower 74 are provided in the casing 75, but the air conditioner control device 2b, the second water channel 66, the third water channel 67, the third water amount adjusting valve 68, the fourth damper 71, the fifth damper 72, and the sixth damper 73 may also be provided in the casing 75.

  The second heat pump 65 repeats the order of compression / condensation / expansion / evaporation for the circulating refrigerant, and dissipates heat in the refrigerant condensing process for the return air and the circulating water to exchange heat with the circulating refrigerant in the refrigerant condensing process. The fourth heat exchanger 63 and the fifth heat exchanger 64, which are different from each other in the circulating refrigerant evaporation step and the condensing step, the compressor 76, an expansion valve for expanding the circulating refrigerant, etc. And a switching mechanism 78 such as a valve for switching between the evaporation process and the condensation process of the fourth heat exchanger 63 and the fifth heat exchanger 64, and these are connected by piping so that the refrigerant circulates. Configure.

  The 3rd heat exchanger 62 is comprised so that the 3rd process which cools or heats the external air of air-conditioning air by circulation of circulating water may be performed. The fourth heat exchanger 63 is configured to perform a fourth process of cooling or heating the return air of the air-conditioning air by circulating the refrigerant. The second water channel 66 is configured to distribute the circulating water before the third treatment to the third heat exchanger 62. The third water channel 67 is configured to branch from the second water channel 66 and distribute the circulating water before the third treatment to the fifth heat exchanger 64.

  The third water amount adjustment valve 68 is a water amount proportional variation method so as to adjust the third processing capability of the third heat exchanger 62 by changing the distribution of the circulation amount of the circulating water in the second water channel 66 and the third water channel 67. It consists of a three-way valve. The third water amount adjusting valve 68 may be a three-way valve that switches so that the entire amount flows in one of the second water channel 66 and the third water channel 67 and the other does not flow.

  The fourth humidifier 69 is a steam type that humidifies with steam in the lee of the third heat exchanger 62. The fourth damper 71 increases or decreases the outside air amount of the air conditioning air taken into the second air conditioner 1b. The fifth damper 72 and the sixth damper 73 increase or decrease the amount of return air of the air-conditioning air taken into the second air conditioner 1b. The second blower 74 adjusts to increase or decrease the amount of air-conditioning air supplied to the air-conditioned space S. The outside air taken in from the fourth damper 71 and the return air taken in from the sixth damper 73 by the second blower 74 pass through the third heat exchanger 62 and the return air taken in from the fifth damper 72 is The four heat exchangers 63 are mixed with each other and sent to the air-conditioned space S. The amount of outside air taken in from the fourth damper 71 is adjusted so that the carbon dioxide concentration in the air-conditioned space S falls within a preset range.

  The third heat exchanger 62 is configured in the same manner as the first heat exchanger 35 described above. The fourth heat exchanger 63 is configured in the same manner as the seventh heat exchanger 25 described above. The fifth heat exchanger 64 is configured by partitioning the inside with a heat transfer plate in the same way as a general plate heat exchanger, and circulating water and refrigerant are alternately flowed between the heat transfer plate and the heat transfer plate to transfer the heat. Heat is exchanged between the circulating water and the refrigerant through the hot plate.

  The air conditioner control device 2b of the second air conditioner 1b includes an outside air temperature / humidity detector 81 that detects the temperature and humidity of the outside air, a return air temperature / humidity detector 82 that detects the temperature and humidity of the return air, and a supply of the air conditioner 1b. A temperature / humidity detector 83 for detecting the temperature and humidity of the air, an air volume control unit 84, a water volume control unit 85, a humidification control unit 86, and a compressor control unit 87 are provided. The air conditioner control device 2b includes a microprocessor, various sensors, and other control devices.

  The air volume control unit 84 sets the rotation speed of the second blower 74 of the air conditioner 1b, the damper opening of the fourth damper 71, the damper opening of the fifth damper 72, and the damper opening of the sixth damper 73. It controls and adjusts each air volume of outside air, return air, and supply air. The water amount control unit 85 is configured to control the third water amount adjustment valve 68 to adjust each circulation amount of the circulating water in the third heat exchanger 62 and the fifth heat exchanger 64. The humidification control unit 86 is configured to control the amount of steam generated by the fourth humidifier 69 and adjust the amount of humidification to the air for air conditioning. The compressor control unit 87 is configured to control the number of revolutions of the compressor 76 to adjust the cooling or heating ability.

  When this air conditioner 1b performs a cooling operation that requires dehumidification in the summer, the air is preheated by exchanging heat between the outside air and the exhaust by the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the external air conditioner 3. The supplied outside air is supplied to the air conditioner 1b. In the air conditioner 1b, a target supply air temperature is obtained by a reheat effect generated by cooling and dehumidifying the outside air with the third heat exchanger 62 and mixing with the return air cooled without being dehumidified with the fourth heat exchanger 63. And control to supply air humidity. Thereby, the air-conditioned space S is air-conditioned at a preset temperature and humidity.

  When heating operation is performed in the winter season, preheated outside air is supplied to the air conditioner 1b by exchanging heat between the outside air and the exhaust by the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the external air conditioner 3. . In the air conditioner 1b, the outside air is heated by the third heat exchanger 62 and humidified by the fourth humidifier 69, and the return air is heated by the fourth heat exchanger 63 and mixed, whereby the temperature and humidity of the supply air are mixed. To control. Precooling or preheating by mixing the air in the air-conditioned space S with the outside air before being cooled or heated by the first heat pump 20 by the mixing damper 23 of the external air conditioner 3 during the above-described cooling operation and heating operation. To do. Note that the air conditioner 1b may be used for cooling operation or heating operation without precooling or preheating the outside air with the external air conditioner 3.

  In the winter season, when the circulating water is cooled with warm water, the outside air supplied from the external air conditioner 3 to the air conditioner 1b is heated to a temperature suitable for cooling by the third heat exchanger 62 and steamed by the fourth humidifier 69. Humidify. The return air is cooled or heated to a temperature suitable for cooling by the fourth heat exchanger 63 of the second heat pump 65 and supplied to the air-conditioned space S.

  FIG. 7 shows a third air conditioner 1 c among the plurality of air conditioners 1. The third air conditioner 1c includes a sixth heat exchanger 94, a fourth water channel 95, a fourth water amount adjusting valve 96, a fifth humidifier 97, a seventh damper 98, an eighth damper 99, a third blower 100, and a casing. 101. In the illustrated example, the sixth heat exchanger 94, the fifth humidifier 97, and the third blower 100 are provided in the casing 101. However, the air conditioner control device 2c, the fourth water channel 95, the fourth water amount adjusting valve 96, the seventh The damper 98 and the eighth damper 99 may also be provided in the casing 101.

  The sixth heat exchanger 94 is configured to perform a fifth process for cooling or heating the outside air and the return air of the air-conditioning air through circulation of the circulating water. The fourth water channel 95 is configured by providing a water pipe so that the circulating water flows to the sixth heat exchanger 94. The fourth water amount adjustment valve 96 is a water-proportional two-way valve that adjusts the ability to cool or heat the sixth heat exchanger 94 by changing the circulation amount of the circulating water.

  The fifth humidifier 97 is a steam type that humidifies the air-conditioning air with steam under the sixth heat exchanger 94. The seventh damper 98 increases or decreases the amount of outside air of the air-conditioning air taken into the third air conditioner 1c. The eighth damper 99 increases or decreases the return air amount of the air-conditioning air taken into the third air conditioner 1c. The third blower 100 adjusts to increase or decrease the amount of air-conditioning air supplied to the air-conditioned space S. The third blower 100 mixes the outside air taken in from the seventh damper 98 and the return air taken in from the eighth damper 99 and is sent to the air-conditioned space S through the sixth heat exchanger 94. The amount of outside air taken in from the seventh damper 98 is adjusted so that the carbon dioxide concentration in the air-conditioned space S falls within a preset range.

  The air conditioner control device 2c of the third air conditioner 1c includes an outside air temperature / humidity detector 102 that detects the temperature and humidity of the outside air, a return air temperature / humidity detector 103 that detects the temperature and humidity of the return air, and a supply of the air conditioner 1c. A temperature-and-air-humidity detector 104 that detects the temperature and humidity of the air, an air volume control unit 105, a water volume control unit 106, a humidification control unit 107, and a fifth outside air cooling operation unit 108 are provided. The air conditioner control device 2c includes a microprocessor, various sensors, and other control devices.

  The air volume control unit 105 controls the rotational speed of the third blower 100 of the air conditioner 1c, the damper opening degree of the seventh damper 98, and the damper opening degree of the eighth damper 99 to control the outside air, return air, and supply air It is configured to adjust each air volume. The water amount control unit 106 is configured to control the valve opening degree of the fourth water amount adjustment valve 96 to adjust the circulation amount of the circulating water in the sixth heat exchanger 94. The humidification control unit 107 is configured to control the amount of steam generated by the fifth humidifier 97 and adjust the amount of humidification to the outside air and the return air.

  The fifth outside air cooling operation unit 108 detects the temperature of the air-conditioning air before the fifth process detected by the outside air temperature / humidity detector 102 is lower than the temperature of the air-conditioned space S detected by the return air temperature / humidity detector 103. The air-conditioned space S is cooled using the air for air conditioning. When the circulating water is cooled with warm water during the winter season, outside air having a temperature lower than the temperature of the air-conditioned space S is supplied from the external air conditioner 3 to the air conditioner 1a. The outside air and the return air are heated by the sixth heat exchanger 94 to a temperature suitable for cooling, steam humidified by the fifth humidifier 97, and supplied to the air-conditioned space S.

  In addition, this invention is not limited to the above-mentioned Example. As the heat source unit 5, various types such as a heat pump chiller and an absorption type can be applied. The external air conditioner 3, the mixing damper 23, the third damper 45, and the sixth damper 73 may be omitted. The first water amount adjusting valve 39, the second water amount adjusting valve 40, the third water amount adjusting valve 68, and the fourth water amount adjusting valve 96 may be other than the two-way valve or the three-way valve. In the description of the above-described embodiment, the outside air of the air-conditioning air may be replaced with return air, and the return air may be replaced with outside air.

  In addition, some or all of the first humidifier 41, the second humidifier 42, the third humidifier 48, the fourth humidifier 69, and the fifth humidifier 97 have both a vaporizing humidifier and a steam humidifier. You may comprise. For example, air conditioning air is first humidified with a vaporizing humidifier that consumes less energy, and when the vaporizing humidifier is insufficiently humidified, the steam humidifier only humidifies only the shortage. It is possible to achieve both improvement in humidification accuracy and reduction in energy consumption. The water circulation pipe 8 can be freely changed to various methods such as a direct return method, a reverse return method, and a combination thereof.

It is explanatory drawing which shows the whole structure of the air conditioning system of this invention. It is a simplified explanatory drawing which shows the internal structure of an external air handler. It is a simplified explanatory view showing the internal configuration of the first air conditioner. It is a simplified explanatory view of a heat exchanger. It is a simplified explanatory view showing another example of the first air conditioner. It is a simplified explanatory view showing the internal configuration of the second air conditioner. It is a simplified explanatory view showing the internal configuration of the third air conditioner.

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Air conditioner control apparatus 3 External air conditioner 5 Heat source machine 6 Water circulation apparatus 7 Heat source machine control apparatus 16 Heat source machine output compensation part 20 1st heat pump 35 1st heat exchanger 36 2nd heat exchanger 37 1st water path 38 Bypass channel 39 First water amount adjustment valve 40 Second water amount adjustment valve 41 First humidifier 42 Second humidifier 46 First blower 48 Third humidifier 56 First outside air cooling operation unit 57 First cooling capacity compensation unit 58 First Air conditioning capability compensation unit 59 First air conditioning capability control unit 60 Second outside air cooling operation unit 62 Third heat exchanger 63 Fourth heat exchanger 64 Fifth heat exchanger 65 Second heat pump 66 Second water channel 67 Third water channel 68 First 3 Water quantity adjustment valve 69 4th humidifier 74 2nd air blower 76 Compressor 94 6th heat exchanger 95 4th water channel 96 4th water quantity adjustment valve 97 5th humidifier 100 3rd air blower 108 5th outside air cooling operation Department S the air-conditioned space

If the outside air, which is air for air conditioning, is cooled and dehumidified by the first heat exchanger, and the return air, which is air for air conditioning, is cooled without being dehumidified by the second heat exchanger, the outside air load (latent heat) is two-pipe. And the indoor load (sensible heat) can be processed individually to obtain a reheat effect, and the reheat energy is saved. Since it is a two-pipe type, heat source equipment and circulating water piping facilities are simplified, saving energy and cost. Since the water temperature difference of the circulating water is expanded by performing the second treatment of the second heat exchanger with the circulating water after the first treatment of the first heat exchanger, the operating efficiency of the heat source machine is improved and the energy is saved. The air conditioning system can be simplified and the cost can be reduced by minimizing the lengths of the pipes constituting the first water channel and the bypass water channel, and the number of the first water amount adjusting valves and the second water amount adjusting valves. The air conditioning air is adjusted to an air condition suitable for cooling or heating by setting the operation to perform both the first process and the second process if the air-conditioning load of the air-conditioned space is large and setting the operation to perform only the first process if it is small. The control range to be expanded. Therefore, even if the air conditioning load and the outside air load in the air-conditioned space are unbalanced and the energy supply from the heat source device to the air conditioner is excessive or insufficient, stable air conditioning can be performed on the air-conditioned space.

According to the invention of claim 2 , when the water temperature difference caused by the heat exchange by the air conditioner is out of the preset water temperature difference range, the energy of the circulating water supplied to the air conditioner is excessive or insufficient. Will be. Utilizing this, if the temperature difference range set in advance is exceeded, the water speed of the circulating water is increased, and if it is less than the water temperature difference range, the water speed of the circulating water is decreased to reduce or exceed the heat source output. Can be compensated. Even if the control is completely separated and independent from the air conditioner side and the heat source machine side, the energy supply from the heat source machine to the air conditioner can be stabilized, maintaining comfort and saving energy.

According to the invention of claim 3 , since the air-conditioning air supplied to the air conditioner is pre-cooled or pre-heated using the exhaust heat of the air-conditioned space, the air-conditioning load processed by the air-conditioner is reduced and energy is saved. Since the external air conditioner is a heat pump type, energy consumption efficiency is high and energy saving.

According to invention of Claim 4 , since it humidifies with two vaporization type humidifiers, it becomes a comfortable environment without becoming insufficient humidification. It is energy saving because it can be cooled by using the vaporization cooling of the two vaporizing humidifiers without increasing the circulation of circulating water.

According to the invention of claim 5 , even if a temperature difference occurs due to the direction of the air-conditioned space in winter, the comfort can be improved by freely switching between heating and outdoor air cooling with a two-pipe type. Since it is a two-pipe type, heat source equipment and circulating water piping facilities are simplified, saving energy and cost. Since it is humidified with a steam humidifier, it becomes a comfortable environment without dampening.

According to the invention of claim 6 , it is possible to save energy by increasing the air volume of the process having the smaller enthalpy required for cooling or heating the air conditioning air and reducing the air conditioning load. Therefore, even if the air conditioning load and the outside air load in the air-conditioned space are unbalanced and the energy supply from the heat source device to the air conditioner is excessive or insufficient, stable air conditioning can be performed on the air-conditioned space.

According to the invention of claim 7 , if the outside air as air conditioning air is cooled and dehumidified by the third heat exchanger, and the return air as air conditioning air is cooled without being dehumidified by the fourth heat exchanger, two pipes The reheat effect can be obtained by processing the outdoor air load (latent heat) and the indoor load (sensible heat) separately, and the reheat energy is saved. Since it is a two-pipe type, heat source equipment and circulating water piping facilities are simplified, saving energy and cost. The air conditioning system can be simplified and the cost can be reduced by minimizing the length of the pipes constituting the second water channel and the third water channel and the number of the third water amount adjusting valves. Even if there is a difference in temperature depending on the direction of the air-conditioned space, the second heat pump can freely switch between heating and cooling regardless of the temperature of the circulating water, so that air conditioning can be improved.

The heat source device 5 is configured to adjust the supply water temperature of the circulating water supplied to the air conditioner 1 in order to adjust the air state of the air for air conditioning. The water circulation device 6 includes a water circulation pipe 8 configured to circulate the circulating water with respect to the heat source unit 5 and the air conditioner 1, and a water feed pump 9 having a function of changing a water speed and a water supply amount of the circulating water in the water circulation pipe 8. And. The heat source device control device 7 is a control device that is independent from the air conditioner control device 2 and is configured to control the heat source device 5 to switch the circulating water to the supply water temperature according to the state of the outside air load .

The water supply control unit 14 is configured to control the rotation speed of the water supply pump 9 to adjust the water speed and the water supply amount. The supply water temperature control unit 15 compares the preset outside air temperature and outside air humidity with the outside air temperature and outside air humidity detected by the outside air temperature / humidity detector 10. The supply water temperature of the circulating water is switched according to the result . Specifically, the supply water temperature is increased when the outside air is at a high temperature and high humidity, a low temperature and high humidity, a high temperature and low humidity, or a low temperature and low humidity with respect to the outside temperature and humidity set in advance during the cooling of the air-conditioned space S. Switch to 6 to 7 ° C for humidity, 7 to 8 ° C for low temperature and high humidity, 8 to 9 ° C for high temperature and low humidity, and 9 to 10 ° C for low temperature and low humidity. When the outside air is at a high temperature or a low temperature with respect to the preset outside air temperature during the heating of the space S, the supply water temperature is switched to 34 to 36 ° C. when the temperature is high and to 39 to 41 ° C. when the temperature is low.

The preset outside air temperature and outside air humidity during cooling of the air-conditioned space S are, for example, a dry bulb temperature of 28 ° C. and an absolute humidity of 0.011 kg / kg (DA). The preset outside air temperature during heating of the air-conditioned space S is, for example, a dry bulb temperature of 13 ° C. The above-mentioned supply water temperature and the preset outside air temperature and outside air humidity are merely examples, and the present invention is not limited to this, and the setting can be changed freely.

The first air-conditioning capacity control unit 59 performs an operation for performing both the first process and the second process if the air-conditioning load in the air-conditioned space S is large, and performs an operation for performing only the first process if the air-conditioning load in the air-conditioned space S is small. The ability to cool or heat the air-conditioned space S by switching is controlled. For example, if the ability to cool or heat the air-conditioned space S is insufficient even when only the first process is performed, the lack of capacity is compensated by using the second process together.

Claims (11)

  An air conditioner (1) for supplying air to the air-conditioned space (S) for cooling or heating, and an air condition suitable for the cooling or heating by controlling the air conditioner (1). An air conditioner control device (2) for adjusting the air conditioner, a heat source device (5) for adjusting the supply water temperature of the circulating water supplied to the air conditioner (1) for adjusting the air condition of the air conditioning air, A control device independent of the air conditioner control device (2), the heat source device control device (7) automatically and variably adjusting the supply water temperature of the circulating water according to fluctuations in the outside air load. A characteristic air conditioning system.   When cooling the air-conditioned space (S), when the outside air is hot and humid with respect to the preset outside temperature and outside humidity, the supply water temperature of the circulating water automatically variably adjusted by the heat source device control device (7) Is set to 6-7 ° C, 7-8 ° C when the outside air is low temperature and high humidity, 8-9 ° C when the outside air is high temperature and low humidity, and when the outside air is low temperature and low humidity When the air-conditioned space (S) is heated to 9 to 10 ° C., the supply water temperature of the circulating water that is automatically variably adjusted by the heat source controller (7) is set to a preset outside air temperature. The air conditioning system according to claim 1, wherein the air conditioning system is set to 34 to 36 ° C when the outside air is high temperature and 39 to 41 ° C when the outside air is low temperature.   A water circulation device (6) for circulating the circulating water is provided, and the heat source device control device (7) is configured such that when the water temperature difference of the circulating water generated by the supply to the air conditioner (1) is out of the preset water temperature difference range. The air according to claim 1 or 2, further comprising a heat source unit output compensation unit (16) that compensates for excess or deficiency of the heat source unit output by controlling a water circulation device (6) and adjusting a water speed of the circulating water. Harmony system.   An air conditioner (1) having a first heat pump (20) and pre-cooling or pre-heating the air-conditioning air by exchanging heat between the air-conditioning air and the air in the air-conditioned space (S) by the first heat pump (20). The air conditioning system according to any one of claims 1 to 3, further comprising an external air conditioner (3) supplied to the air conditioner.   The first air conditioner (1a) cools the air conditioning air by the first heat exchanger (35) for performing a first process of cooling or heating the air conditioning air by circulation of the circulating water, and the circulation of the circulating water. Or the 2nd heat exchanger (36) which performs the 2nd process to heat, and the air for the air conditioning after the 1st processing and the air for the air conditioning after the 2nd processing are supplied to the air-conditioned space (S) 1 blower (46), a first water channel (37) for circulating the circulating water to the first heat exchanger (35) and then to the second heat exchanger (36), and the first water channel ( 37) and a bypass water channel (38) for diverting the circulating water after the first treatment without passing through the second heat exchanger (36), and changing the circulation amount of the circulating water to change the circulating water. A first water amount adjustment valve (39) for adjusting the capacity of the first treatment of one heat exchanger (35), and the second heat exchanger. 36) and a second water amount adjustment valve (40) for adjusting the second processing capacity of the second heat exchanger (36) by changing the distribution of the circulation amount of the circulating water in the bypass channel (38). The air conditioning system according to any one of claims 1 to 4, further comprising:   The first air conditioner control device (2a) performs only one of the first process and the second process and the operation of performing both the first process and the second process according to the size of the air conditioning load of the air-conditioned space (S). The air conditioning system according to claim 5, further comprising a first air conditioning capability control unit (59) that adjusts the capability of cooling or heating the air-conditioned space (S) by switching operation.   The first air conditioner (1a) is a vaporization type first humidifier (41) for humidifying the air-conditioning air by vaporization and evaporation of water under the first heat exchanger (35), and a second heat exchanger ( The air conditioning system according to claim 5 or 6, further comprising a vaporization type second humidifier (42) for humidifying the air-conditioning air by vaporization and evaporation of water under the wind of 36).   The first air conditioner (1a) is a steam-type third humidifier that humidifies air-conditioning air with steam under one or both of the first heat exchanger (35) and the second heat exchanger (36) ( 48), and the first air conditioner control device (2a) is configured such that the temperature of one or both of the air-conditioning air before the first treatment and the air-conditioning air before the second treatment is the air-conditioned space (S). The air conditioning system according to claim 5 or 6, further comprising a second outside air cooling operation section (60) that cools the air-conditioned space (S) using the air-conditioning air when the temperature is lower than the temperature of the air-conditioning system.   The first air conditioner control device (2a) compares the enthalpy for the first process required for the first process with the enthalpy for the second process required for the second process, and determines the air volume of the air-conditioning air for the process with a small enthalpy. The air conditioning system according to any one of claims 5 to 8, further comprising a first air conditioning capability compensator (58) for increasing the air conditioning load of the first air conditioner (1a).   The second air conditioner (1b) cools or heats the air conditioning air by a third heat exchanger (62) that performs a third process for cooling or heating the air conditioning air by circulation of circulating water, and the refrigerant circulation. A fourth heat exchanger (63) for performing the fourth treatment, a fifth heat exchanger (64) for exchanging heat between the refrigerant and the circulating water, and switching the cooling and heating of the fourth treatment to change the fourth heat exchanger (64). A second heat pump (65) having the fourth heat exchanger (63), the fifth heat exchanger (64), and a compressor (76) configured to adjust a processing capacity; A second blower (74) for supplying the air-conditioning air after the treatment and the air-conditioning air after the fourth treatment to the air-conditioned space (S), and the circulating water before the third treatment as the third heat A second water channel (66) to be circulated through the exchanger (62) and a branch from the second water channel (66) before the third treatment The distribution of the circulation amount of the circulating water in the third water channel (67) for circulating the circulating water to the fifth heat exchanger (64), the second water channel (66), and the third water channel (67) is changed. The air conditioning system according to any one of claims 1 to 9, further comprising a third water amount adjustment valve (68) that adjusts the capacity of the third treatment of the third heat exchanger (62).   A third air conditioner (1c) receives a sixth heat exchanger (94) that performs a fifth process of cooling or heating the air-conditioning air through circulation of circulating water and the air-conditioning air that has been subjected to the fifth process. A third blower (100) to be supplied to the air-conditioned space (S), a steam-type fifth humidifier (97) humidified with steam in the lee of the sixth heat exchanger (94), and a circulation amount of the circulating water And a fourth water amount adjustment valve (96) that adjusts the capacity of the fifth treatment of the sixth heat exchanger (94), and the third air conditioner control device (2c) A fifth outdoor air cooling operation unit (108) that cools the air-conditioned space (S) using the air-conditioned air when the temperature of the air-conditioned air before processing is lower than the temperature of the air-conditioned space (S). The air conditioning system according to any one of claims 1 to 10, further comprising:

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