JP2018071794A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of attaining downsizing and energy saving of a latent heat treatment device, and maintaining comfort of an air-conditioned space, in an air conditioning system including the latent heat treatment device configured to perform latent heat treatment of the air-conditioned space and a sensible heat treatment device configured to perform sensible heat treatment of the air-conditioned space.SOLUTION: A sensible heat treatment device 20 includes: latent heat treatment capacity shortage detection means 41 capable of executing latent heat treatment of an air-conditioned space R, and configured to detect occurrence of a latent heat treatment capacity shortage state where shortage in latent heat treatment capacity of a latent heat treatment device 10 occurs with respect to latent heat load of the air-conditioned space R; and sensible heat compensation treatment means 42 configured to cause the latent heat treatment device 20 to execute latent heat treatment to compensate the shortage with latent heat treatment capacity of the sensible heat treatment device 20, in a case of detecting the latent heat treatment capacity shortage state with the latent heat treatment capacity shortage detection means 41.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system including a latent heat treatment apparatus that performs a latent heat treatment of an air conditioning target space and a sensible heat treatment apparatus that performs a sensible heat treatment of the air conditioning target space.

  In a facility having a plurality of air-conditioning target spaces such as commercial facilities and office buildings, the air-conditioning target space may be air-conditioned by an air-conditioning system including a latent heat treatment device and a sensible heat treatment device (for example, Patent Document 1 and 2).

  In the air conditioning system described in Patent Document 1, a ventilation unit that supplies outdoor air to the room and exhausts the room air to the outside is provided as the latent heat treatment apparatus. It is configured to process the latent heat load by dehumidifying the supply air supplied to the room by the moisture adsorption / desorption action. Further, in the air conditioning system described in the same document, an indoor unit is provided as the sensible heat treatment apparatus, and this indoor unit cools the indoor air by heat exchange with the refrigerant and processes the sensible heat load. The indoor air is cooled and dehumidified so that the latent heat load can be processed.

  And in the air-conditioning system of patent document 1 comprised in this way, when both the sensible heat load at the time of air_conditionaing | cooling operation and a latent heat load are large, the sensible heat load by the desorption heat of a desiccant rotor being supplied indoors In order to avoid a further increase in the temperature, the dehumidifying operation by the moisture absorption / desorption action of the desiccant rotor in the ventilation device is not performed, but the dehumidifying operation is performed by cooling the indoor air in the indoor unit as the sensible heat treatment device. (See paragraphs 0032 and 0033 of Patent Document 1 and FIG. 3 and the like).

  The air conditioning system described in Patent Document 2 is provided with a humidity control device that mainly performs a latent heat treatment of an indoor space as the latent heat treatment device, and the humidity control device is adsorbed by a refrigerant evaporated by an adsorption heat exchanger. By cooling the agent and adsorbing moisture in the air to the adsorbent, the air supply supplied to the indoor space is dehumidified to handle the latent heat load. Further, in the air conditioning system described in the same document, an air conditioner that mainly performs sensible heat treatment of an indoor space is provided as the sensible heat treatment apparatus. In addition to processing the sensible heat load by cooling and heating, the room air is cooled and dehumidified by heat exchange with the refrigerant so that the latent heat load can be processed.

  And in the air conditioning system of patent document 2 comprised in this way, the amount of latent heat processing processed with the humidity control apparatus as a latent heat processing apparatus, and the amount of latent heat processing processed with the air conditioner as a sensible heat processing apparatus are set. It is configured to appropriately control so as to minimize the overall power consumption (see paragraphs 0109 to 0123 of Patent Document 2).

JP 2010-255973 A JP 2012-077948 A

  In an air conditioning system equipped with a latent heat treatment device and a sensible heat treatment device, if the latent heat load temporarily increases due to an increase in the number of people in the air-conditioning target space, the latent heat load must be sufficiently processed. In order to maintain the comfort of the air-conditioning target space, it is necessary to set the amount of latent heat treatment of the latent heat treatment device to a relatively large value as the number increases.

For example, as in the air conditioning system described in Patent Document 1 described above, when both the sensible heat load and the latent heat load during the cooling operation are large, the dehumidifying operation is performed only by the sensible heat treatment apparatus to process the latent heat load. However, as described in paragraphs 0030 and 0034 of FIG. 3 and FIG. 3, when the sensible heat load is relatively small, the latent heat load is processed only by the latent heat treatment apparatus as usual. In addition, when the latent heat load temporarily increases, the latent heat treatment amount of the latent heat treatment apparatus is set to a relatively large value accordingly.
On the other hand, as in the air conditioning system described in Patent Document 2 described above, for the purpose of minimizing the overall power consumption, the one that controls the amount of latent heat treatment of the latent heat treatment apparatus and the amount of latent heat treatment of the sensible heat treatment apparatus is also latent heat. Regardless of the size of the load, since the burden ratio on the latent heat treatment apparatus side with respect to the latent heat load is determined, it is necessary to set the latent heat treatment amount of the latent heat treatment apparatus to be relatively large.

  In this way, in order to maintain the comfort of the air-conditioning target space by setting the amount of latent heat treatment of the latent heat treatment apparatus to be relatively large, the latent heat treatment capacity of the latent heat treatment apparatus is set to such a temporary latent heat load. It is necessary to determine with a large margin so as to be able to cope with the increase, and there is a concern that the latent heat treatment apparatus is enlarged and the energy saving property is deteriorated. Moreover, even if the latent heat treatment device performs cooling and dehumidification to treat the latent heat load, it is necessary to extremely lower the cooling temperature in order to increase the latent heat treatment capability, so there is a concern that the energy saving performance is deteriorated.

  In view of this situation, the main problem of the present invention is to reduce the size of the latent heat treatment apparatus in an air conditioning system including a latent heat treatment apparatus that performs latent heat treatment of the air conditioning target space and a sensible heat treatment apparatus that performs sensible heat treatment of the air conditioning target space. And it is in the point of providing the technique which can maintain the comfort of the said air-conditioning object space, implement | achieving energy saving.

A first characteristic configuration of the present invention is an air conditioning system including a latent heat treatment apparatus that performs a latent heat treatment of an air conditioning target space, and a sensible heat treatment apparatus that performs a sensible heat treatment of the air conditioning target space,
The sensible heat treatment apparatus is configured to be able to perform a latent heat treatment of the air-conditioning target space,
A latent heat treatment capability deficiency detecting means for detecting the occurrence of a latent heat treatment capability deficiency state in which there is a deficiency in the latent heat treatment capability of the latent heat treatment apparatus with respect to the latent heat load of the air conditioning target space;
When the latent heat treatment capacity shortage detecting means detects a latent heat treatment capacity shortage state, the latent heat treatment processing means causes the sensible heat treatment apparatus to perform the latent heat treatment and supplements the shortage with the latent heat treatment capacity of the sensible heat treatment apparatus. It is in the point with.

  According to this configuration, when the latent heat treatment capability shortage detection unit detects a latent heat treatment capability shortage state, the latent heat supplement processing unit is activated, and the latent heat treatment device has insufficient latent heat treatment capability with respect to the latent heat load of the air conditioning target space. Can be supplemented by latent heat treatment using a sensible heat treatment apparatus. As a result, the latent heat treatment capacity of the latent heat treatment apparatus is kept as low as possible, and the latent heat treatment apparatus and the sensible heat treatment apparatus coordinate the latent heat load of the air-conditioning target space while realizing downsizing and energy saving of the latent heat treatment apparatus. It can be sufficiently processed to eliminate the shortage of latent heat treatment capacity, and the comfort of the air-conditioned space can be obtained.

The second characteristic configuration of the present invention is configured such that the latent heat treatment apparatus distributes and supplies the conditioned air after the treatment to a plurality of air conditioned spaces,
The sensible heat treatment apparatus is arranged in each of the plurality of air-conditioning target spaces, and is configured to supply processed air-conditioned air to the arranged air-conditioning target spaces,
The latent heat treatment capacity shortage detecting means identifies the air conditioning target space in the latent heat treatment capacity shortage state among the plurality of air conditioning target spaces as the latent heat treatment capacity shortage space,
The latent heat supplement processing means causes the sensible heat treatment apparatus installed in the specified latent heat treatment capacity insufficient space to execute latent heat treatment.

  According to this configuration, in the configuration in which the sensible heat treatment apparatus is arranged in each of the plurality of air-conditioning target spaces that distribute and supply the conditioned air by the latent heat treatment apparatus, in the part of the plurality of air-conditioning target spaces that has insufficient latent heat treatment capacity. Even when the latent heat treatment capability deficiency state occurs, the latent heat treatment capability deficient space can be identified and the latent heat treatment apparatus installed in the latent heat treatment capability deficient space can be executed. Thereby, the latent heat treatment capability of the latent heat treatment apparatus can be suppressed as low as possible, and the increase in the size of the latent heat treatment apparatus and the deterioration of energy saving can be suppressed. Furthermore, in some latent heat treatment capacity deficient spaces, the latent heat treatment capacity deficiency is complemented by latent heat treatment using a sensible heat treatment device installed in the latent heat treatment capacity deficient space. In addition, in the air-conditioning target space other than the space where the latent heat treatment capability is insufficient, excessive latent heat treatment by the latent heat treatment apparatus can be suppressed, and deterioration of comfort can be prevented.

According to a third characteristic configuration of the present invention, the latent heat treatment is a dehumidification process for dehumidifying air and supplying the air to the air-conditioned space.
The sensible heat treatment is a cooling process for cooling the air by heat exchange with the refrigerant and supplying the air to the air-conditioned space,
The sensible heat treatment apparatus, as the dehumidifying process, reduces the air flow rate during the cooling process to decrease the air cooling temperature, and increases the refrigerant flow rate during the cooling process to increase the air cooling temperature. It is the point which is comprised so that at least one of the refrigerant | coolant flow volume increase processing to reduce can be performed.

  According to this configuration, when the dehumidifying process is performed as the latent heat treatment by the latent heat treatment apparatus and the cooling process is performed as the sensible heat treatment apparatus by the sensible heat treatment apparatus, the air flow rate is decreased to reduce the air flow rate with respect to the sensible heat treatment apparatus. With the simple and rational configuration of executing the process or the refrigerant flow rate increasing process for increasing the refrigerant flow rate, the dehumidifying process for dehumidifying the air by lowering the cooling temperature of the refrigerant below the dew point can be executed as the latent heat treatment.

The fourth characteristic configuration of the present invention is configured such that the sensible heat treatment apparatus can perform the air flow rate reduction process and the refrigerant flow rate increase process as the dehumidification process,
When the latent heat supplement processing means detects the latent heat treatment capacity shortage detection state by the latent heat treatment capacity shortage detection means, the air flow rate reduction process is executed prior to the refrigerant flow rate increase process.

  According to this configuration, when the sensible heat treatment apparatus is caused to perform dehumidification processing when a latent heat treatment capacity shortage state is detected, the air flow rate reduction process without increasing the refrigerant flow rate is performed, and the refrigerant flow rate increasing with increasing refrigerant flow rate is performed. Since the processing is performed with priority over the processing, an increase in the power for transporting the refrigerant from the heat source device to the sensible heat treatment apparatus can be suppressed as much as possible to improve energy saving.

  According to a fifth characteristic configuration of the present invention, the latent heat supplement processing means executes the air flow rate reduction process when the latent heat treatment capacity shortage detecting means detects a latent heat treatment capacity shortage state, and executes the air flow rate reduction process. When the temperature of the air-conditioning target space is equal to or higher than a predetermined threshold temperature, the air flow rate reduction process is stopped and the refrigerant flow rate increase process is executed.

  According to this configuration, the amount of cold air supplied from the sensible heat treatment apparatus to the air-conditioning target space is reduced by executing the air flow rate reduction process, so that the temperature of the air-conditioning target space to which the cold air is supplied is equal to or higher than the threshold temperature. In this case, the air flow rate reduction process can be stopped, and the refrigerant flow rate increase process can be executed without a decrease in the amount of cold air supplied. Thus, the shortage of the latent heat treatment capacity of the latent heat treatment apparatus can be supplemented by the latent heat treatment capacity of the sensible heat treatment apparatus while suppressing a temperature rise above the threshold temperature of the air conditioning target space.

  According to a sixth characteristic configuration of the present invention, the latent heat supplement processing means executes the air flow rate reduction process when the latent heat treatment capacity shortage detection means detects a latent heat treatment capacity shortage state, and executes the air flow rate reduction process. When the humidity of the air-conditioning target space is equal to or higher than a predetermined threshold humidity, the refrigerant flow rate increasing process is executed while continuing the air flow rate decreasing process.

  According to this configuration, when the air flow rate reduction process is being performed when the latent heat treatment capacity shortage state is detected, the air flow rate reduction process is performed when the humidity of the air-conditioning target space exceeds the threshold humidity and does not sufficiently decrease. In addition, the refrigerant flow rate increasing process is executed in parallel, and the air whose flow rate has been reduced is sufficiently cooled below the dew point by heat exchange with the refrigerant whose flow rate has been increased. Thus, air with sufficiently low humidity can be supplied to the air-conditioning target space to promote a decrease in the humidity of the air-conditioning target space, and the state of insufficient latent heat treatment capacity in the air-conditioning target space can be reliably and quickly eliminated.

Diagram showing the configuration of the air conditioning system The figure which shows the control flow of the air conditioning system in 1st Embodiment. The figure which shows the control flow of the air conditioning system in 2nd Embodiment.

[First Embodiment]
A first embodiment of an air conditioning system according to the present invention will be described based on the drawings.
An air conditioning system 100 shown in FIG. 1 is provided in a facility having a plurality of air conditioning target spaces R such as commercial facilities and office buildings, and mainly includes a latent heat treatment apparatus 10 that performs latent heat treatment of the air conditioning target spaces R, and mainly A sensible heat treatment apparatus 20 that performs sensible heat treatment of the air-conditioning target space R (two air-conditioning target spaces R are illustrated in FIG. 1) and a control device 40 that controls the operation of these processing apparatuses 10 and 20 are provided. ing.

  The latent heat treatment apparatus 10 distributes and supplies the outdoor air OA taken from the outdoor O by the blowing power of the air supply fan 11 to the plurality of air-conditioning target spaces R through the air supply duct 1 as the supply air SA, and by the blowing power of the exhaust fan 13. The room air RA taken in from the plurality of air-conditioning target spaces R through the exhaust duct 2 is discharged to the outdoor O as the exhaust EA.

  Furthermore, the latent heat treatment apparatus 10 is configured as a desiccant-type dehumidification apparatus including a desiccant rotor 14 that can dehumidify the outside air OA and supply the treated air-conditioned air to a plurality of air-conditioning target spaces R.

  Specifically, in the latent heat treatment apparatus 10, a so-called dehumidification process (latent heat treatment) is performed in which the outside air OA taken from the outdoor O is passed through the desiccant rotor 14 and moisture is adsorbed to the desiccant rotor 14 to dehumidify to the set humidity. Is executed). Further, since the outside air OA after dehumidification is heated by the adsorption heat of the desiccant rotor 14, the outside air OA is passed through the cooling coil 12 and supplied with the low-temperature cooling water CW ( It is cooled by heat exchange with an example of a refrigerant. The cooled outside air OA is distributed and supplied to the plurality of air conditioning target spaces R through the air supply duct 1 as the air supply SA.

On the other hand, in the latent heat treatment apparatus 10, the indoor air RA taken from the plurality of air-conditioning target spaces R through the exhaust duct 2 is appropriately heated by the regenerator 15 and then passed to the desiccant rotor 14. As a result, moisture contained in the desiccant rotor 14 is released, and the desiccant rotor 14 is regenerated. And the indoor air RA containing the water | moisture content is discharged | emitted by the outdoor O as the exhaust_gas | exhaustion EA.
In the present embodiment, the latent heat treatment apparatus 10 is configured as a desiccant-type dehumidifying apparatus. However, the present invention is not limited to this configuration. For example, a cooling type in which the outside air OA is dehumidified by being cooled below the dew point. You may comprise as a dehumidifier of this.

  On the other hand, the sensible heat treatment apparatus 20 is individually disposed in each of the plurality of air-conditioning target spaces R, and is configured as a fan coil unit that cools the indoor air RA and supplies the processed air-conditioned air to the air-conditioning target space R. Yes.

  Specifically, in the sensible heat treatment apparatus 20, the indoor air RA taken in from the air-conditioning target space R by the blower power of the fan 21 is passed through the cooling coil 22, and the low-temperature cooling water CW (refrigerant) supplied from the chiller 35. A so-called cooling process (an example of a sensible heat treatment) is performed to cool to a set temperature by heat exchange with an example. The cooled indoor air RA is supplied to the air-conditioning target space R as the supply air SA.

  Further, in the sensible heat treatment apparatus 20, a so-called dehumidification process (an example of a latent heat treatment) is performed in accordance with a command from the control device 40, in which the room air RA is dehumidified by being cooled to a dew point lower than a set temperature in the cooling coil 22. Is done. Although details will be described later, the dehumidifying process executed by the sensible heat treatment apparatus 20 includes an air flow rate reducing process and a cooling water amount increasing process (an example of a refrigerant flow rate increasing process), and each of these processes is performed alone or in parallel. Configured to be executable.

The air flow rate reduction process executed in the sensible heat treatment apparatus 20 is a mode in which, for example, the air flow rate of the fan 21 is set to a latent heat treatment air flow rate that is smaller than the normal air flow rate, and the air flow rate during the cooling process is reduced. In this manner, the cooling temperature of the air by the cooling coil 22 is lowered.
By executing such an air flow rate reduction process, in the sensible heat treatment apparatus 20, the flow rate of the indoor air RA cooled by the cooling water CW in the cooling coil 22 decreases, so the temperature after cooling the indoor air RA ( (Cooling temperature) will decrease. And when the cooling temperature of the indoor air RA becomes below the dew point of the air, the indoor air RA can be cooled and dehumidified and supplied to the air conditioning target space R as the supply air SA.

  The cooling water amount increasing process executed in the sensible heat treatment apparatus 20 is performed by, for example, increasing the opening of the adjustment valve 23 that can adjust the cooling water supply amount to the cooling coil 22 and the cooling water flow rate (refrigerant) during the cooling process. The flow rate is increased, and the cooling temperature of the air by the cooling coil 22 is lowered.

  By executing such a cooling water amount increasing process, in the sensible heat treatment apparatus 20, the flow rate of the cooling water CW for cooling the indoor air RA in the cooling coil 22 increases, so the temperature after cooling the indoor air RA (Cooling temperature) will decrease. And when the cooling temperature of the indoor air RA becomes below the dew point of the air, the indoor air RA can be cooled and dehumidified and supplied to the air conditioning target space R as the supply air SA.

  Each air conditioning target space R is provided with a temperature sensor 24 that measures the actual room temperature (dry bulb temperature) and a humidity sensor 25 that measures the actual room humidity (relative humidity). In addition, about the installation number of the temperature sensor 24 or the humidity sensor 25 in one air-conditioning object space R, although the state in which only one each was installed is described in FIG. 1, you may install two or more, respectively. . Moreover, when installing two or more, the average value and representative value of each detection value can be handled as a measured value.

The control device 40 functions as means for performing operation control of the latent heat treatment device 10 and the sensible heat treatment device 20 using the measurement results of the temperature sensor 24 and the humidity sensor 25, and further detects the lack of latent heat treatment capability. It also functions as means 41 and latent heat complement processing means 42.
That is, the latent heat treatment capacity shortage detection means 41 is configured as a means for detecting the occurrence of a latent heat treatment capacity shortage state in which the latent heat treatment capacity of the latent heat treatment apparatus 10 is insufficient with respect to the latent heat load of the air conditioning target space R. . Further, when the latent heat treatment capacity shortage detection means 41 detects the latent heat treatment capacity shortage state, the latent heat supplement processing means 42 causes the sensible heat treatment apparatus 20 to execute the latent heat treatment and the latent heat treatment apparatus 10 has insufficient latent heat treatment capacity. It is configured as means for supplementing the minute with the latent heat treatment capability of the sensible heat treatment apparatus 20.

The air conditioning system 100 according to the present embodiment includes the latent heat treatment capability deficiency detection unit 41 and the latent heat supplement processing unit 42, thereby realizing a reduction in size and energy saving of the latent heat treatment apparatus 10, and an air conditioning target space. R comfort can be maintained.
Hereinafter, in addition to the detailed configuration of the latent heat treatment capability deficiency detection means 41 and the latent heat supplement processing means 42, details of the operation control flow executed by the control device 40 functioning as these means 41 and 42 will be described with reference to FIG. Add

  First, the control device 40 performs an initial setting (step # 01), and sets a set temperature (an example of a threshold temperature) and a set humidity (an example of a threshold humidity) that are used in various processes described later. Then, latent heat treatment (dehumidification) by the latent heat treatment apparatus 10 and sensible heat treatment (cooling) by the sensible heat treatment apparatus 20 are started (step # 02). Thus, the supply air SA dehumidified by the latent heat treatment apparatus 10 is distributed and supplied to each air conditioning target space R, and the room air RA is cooled to the set temperature by the sensible heat treatment apparatus 20 in each air conditioning target space R. It will be.

  When the operation of the latent heat treatment apparatus 10 and the sensible heat treatment apparatus 20 is started in this way, the latent heat treatment capability deficiency detecting means 41 measures the indoor humidity of each air-conditioning target space R by the humidity sensor 25 (step # 03). Then, a state in which the indoor humidity measured by the humidity sensor 25 exceeds the desired target humidity is set as a latent heat treatment capability insufficient state, and the air conditioning target space R in the latent heat treatment capability insufficient state among the plurality of air conditioning target spaces R is subjected to the latent heat treatment. The presence or absence of the latent heat treatment capacity deficient space R1 is determined in a form that specifies the capacity shortage space R1 (in FIG. 1, the right air-conditioning target space R is the latent heat treatment capacity deficiency space R1) (step # 04).

  When it is determined that the latent heat treatment capacity insufficient space R1 does not exist (No in Step # 04), the latent heat supplement processing means 42 described later does not operate and this flow ends. However, when it is determined that the latent heat treatment capability insufficient space R1 exists (Yes in Step # 04), the latent heat supplement processing means 42 is operated, and the sensible heat treatment apparatus 20 installed in the latent heat treatment capability insufficient space R1 is installed. On the other hand, at least one of the above-described latent heat treatment of the air flow rate reduction process and the cooling water amount increase process is executed.

  Here, the latent heat supplement processing means 42, which will be described in detail later, performs the air flow rate reduction process when the sensible heat treatment apparatus 20 installed in the latent heat treatment capacity insufficient space R1 performs the latent heat treatment. The process is configured to be executed with priority over the increase process. With this configuration, the execution frequency of the cooling water amount increasing process accompanied by an increase in the conveyance power of the cooling water CW from the chiller 35 to the sensible heat treatment apparatus 20 is suppressed, and the energy saving performance is improved.

  Specifically, when it is determined that the latent heat treatment capability insufficient space R1 exists (Yes in Step # 04), the sensible heat treatment apparatus 20 installed in the latent heat treatment capability insufficient space R1 is caused to execute the air flow rate reduction process. (Step # 12). Then, the flow rate of air cooled by the cooling water CW in the cooling coil 22 of the sensible heat treatment apparatus 20 decreases, so that the cooling temperature of the air decreases, and cooling and dehumidification of the supply air SA is achieved.

  When the room humidity measured by the humidity sensor 25 becomes equal to or lower than the first set humidity during execution of the air flow rate reduction process by the sensible heat treatment apparatus 20 in the latent heat treatment capacity shortage space R1 (Yes in step # 13). In step S11, since the latent heat treatment capacity shortage state in the latent heat treatment capacity shortage space R1 has been resolved, the current air flow rate reduction process is terminated (step # 11). Then, returning to the above-described step # 03, the measurement of the indoor humidity in step # 03 and the determination of the presence or absence of the latent heat treatment capability insufficient space R1 in step # 04 are performed again.

Conversely, when the indoor humidity measured by the humidity sensor 25 does not become the first set humidity or lower during the air flow rate reduction process (No in step # 13), the set temperature and the second set humidity are not affected. Judgment (step # 14 and step # 15) regarding the indoor temperature and indoor humidity conditions is performed.
When the room temperature measured by the temperature sensor 24 is not equal to or higher than the set temperature (No in step # 14), the room humidity measured by the humidity sensor 25 is used in the determination in step # 13. If it is not equal to or higher than the second set humidity set slightly higher than the one set humidity (No in step # 15), the process returns to step before step # 12 to continue the air flow rate reduction process, and further humidity is increased. It will be reduced.

  Here, the set temperature and set humidity are set as temperatures and humidity that can maintain the comfort of the air-conditioning target space R. Further, the first set humidity used in the determination in step # 13 is set to a value slightly smaller than the target humidity used in the determination of the latent heat treatment capability insufficient state in step # 04. As a result, immediately after the air flow rate reduction process is completed in step # 11, a so-called hunting state in which the latent heat treatment capacity insufficient state is detected in step # 04 and the air flow rate reduction process is resumed in the same latent heat treatment capacity insufficient space R1. Has been avoided.

  On the other hand, when the indoor humidity measured by the humidity sensor 25 is not lower than the first set humidity during the execution of the air flow rate reduction process (No in step # 13), the indoor temperature measured by the temperature sensor 24 is When the temperature is equal to or higher than the set temperature (Yes in Step # 14), the sensible heat treatment capability of the sensible heat treatment apparatus 20 is reduced by the execution of the air flow rate reduction process. It is considered that the temperature has risen above the set temperature to be maintained. Therefore, in this case, after the ongoing air flow rate reduction process is completed (step # 22), the sensible heat treatment apparatus 20 installed in the latent heat treatment capacity insufficient space R1 is caused to execute the cooling water amount increase process (step #). 23). Then, in the cooling coil 22 of the sensible heat treatment apparatus 20, the flow rate of air cooled by the cooling water CW is increased to return to the original flow rate, but the cooling temperature of the air is lowered by increasing the flow rate of the cooling water CW. Thus, cooling and dehumidification of the supply air SA is achieved.

  When the room temperature measured by the temperature sensor 24 is not equal to or higher than the set temperature (No in Step # 14), and the room humidity measured by the humidity sensor 25 is equal to or higher than the second set humidity (Yes in Step # 15). In order to further expand the dehumidifying capacity in the sensible heat treatment apparatus 20, the sensible heat treatment apparatus 20 installed in the latent heat treatment capacity deficient space R1 performs the cooling water amount increasing process while performing the air flow rate reduction process (step S1). # 23). Then, the cooling coil 22 of the sensible heat treatment apparatus 20 increases the flow rate of the cooling water CW while maintaining the state where the flow rate of air cooled by the cooling water CW is reduced. As a result, the cooling temperature of the air is further lowered in the cooling coil 22, and cooling and dehumidification of the supply air SA is further achieved.

If the indoor humidity measured by the humidity sensor 25 is not lower than or equal to the third set humidity during the execution of this cooling water amount increasing process (No in Step # 25), the process returns to before Step # 23 and is being executed. The process of increasing the amount of cooling water will be continued to further reduce the humidity.
In addition, when the indoor humidity measured by the humidity sensor 25 is equal to or lower than the third set humidity during the execution of the cooling water amount increasing process (Yes in step # 25), the ongoing cooling water amount increasing process is terminated. (Step # 21), returning to before Step # 13 described above, Steps # 13 to # 15 are executed to determine whether or not it is necessary to execute the air flow rate reduction process.

  Here, the third set humidity used in the determination in step # 25 is larger than the first set humidity used in the determination in step # 13, and is smaller than the second set humidity used in the determination in step # 15. It is set within the range (that is, there is a relationship of first set humidity <third set humidity <second set humidity). Thereby, in step # 15, the indoor humidity is determined to be equal to or higher than the second set humidity (Yes in step # 15), and immediately after the cooling water amount increasing process is started (step # 23), the indoor humidity is increased in step # 25. It is possible to avoid the case where it is determined that the humidity is equal to or lower than 3 set humidity (Yes in Step # 25) and the cooling water amount increasing process is ended (Step # 21). Furthermore, immediately after the indoor humidity is determined to be equal to or lower than the third set humidity in step # 25 (Yes in step # 25) and the cooling water amount increasing process is finished (step # 21), the indoor humidity is first set in step # 13. It can also be avoided that it is determined that the humidity is equal to or lower than the set humidity (YES in Step # 13) and the air flow rate reduction process is terminated without being continued (Step # 11).

[Second Embodiment]
In the first embodiment, the latent heat treatment that can be performed by the sensible heat treatment apparatus 20 is configured to execute at least one of the air flow rate reduction process and the cooling water amount increase process. However, a latent heat treatment different from these processes is performed. You may comprise so that execution is possible with a sensible heat processing apparatus. For example, as a latent heat treatment that can be performed by such a sensible heat treatment apparatus 20, the temperature of the cooling water CW supplied from the chiller 35 to the cooling coil 22 of the sensible heat treatment apparatus 20 is lowered to cool the air by the cooling coil 22. The cooling water temperature reduction process which reduces temperature can be mentioned.
Hereinafter, as a second embodiment of the air conditioning system according to the present invention, a configuration in which the sensible heat treatment apparatus 20 performs an air flow rate reduction process, a cooling water amount increase process, and a cooling water temperature decrease process will be described.

  The air conditioning system of the present embodiment is the same as the air conditioning system 100 of the first embodiment (see FIG. 1) in terms of the basic configuration, and thus the description thereof is omitted. However, the sensible heat treatment apparatus 20 has an air flow rate reduction process and a cooling water amount. Each of the increase process and the cooling water temperature decrease process can be executed independently or in parallel. With this configuration, even if the air flow rate reduction process or the cooling water amount increase process is executed, the cooling water temperature reduction process is executed even if the latent heat treatment capacity shortage state in the latent heat treatment capacity shortage space R1 is not resolved. Thus, the state of insufficient latent heat treatment capability can be reliably resolved.

  Further, when the latent heat treatment capacity shortage detection means 41 detects the latent heat treatment capacity shortage state, the air flow rate reduction process is executed in preference to the cooling water volume increase process, and the cooling water volume increase process is further performed. Prioritize the cooling water temperature lowering process. With this configuration, the execution frequency of the cooling water amount increasing process accompanying the increase in the conveyance power of the cooling water CW from the chiller 35 to the sensible heat treatment apparatus 20 is suppressed, and an increase in the cooling load of the chiller 35 and the conveyance piping of the cooling water CW are suppressed. Since the execution frequency of the cooling water temperature lowering process accompanied by an increase in the amount of heat release at is further suppressed, energy saving performance is improved.

  Hereinafter, the details of the operation control flow executed by the control device 40 in such a configuration will be described with reference to FIG. Note that the same steps as those described in the first embodiment are denoted by the same reference numerals, and description thereof may be omitted.

If the indoor humidity measured by the humidity sensor 25 is not equal to or higher than the fourth set humidity set slightly higher than the third set humidity used in the determination of step # 25 during the execution of the cooling water amount increasing process (step If the indoor humidity does not fall below the third set humidity (No in # 24) (No in Step # 25), the process returns to before Step # 23 to continue the cooling water amount increasing process and the like. Therefore, the humidity will be further reduced.
Further, when the indoor humidity measured by the humidity sensor 25 is not equal to or higher than the fourth set humidity during the execution of the cooling water amount increasing process (No in step # 24), the indoor humidity is equal to or lower than the third set humidity. If this is the case (Yes in step # 25), the cooling water amount increase process being executed is terminated (step # 21), the process returns to the previous step # 13, and steps # 13 to # 15 are executed to execute the air flow rate. It is determined whether or not it is necessary to execute the reduction process.

  On the other hand, when the indoor humidity measured by the humidity sensor 25 is equal to or higher than the fourth set humidity during execution of the cooling water amount increasing process (Yes in step # 24), the dehumidification capability of the sensible heat treatment apparatus 20 is further expanded. In order to achieve this, the sensible heat treatment apparatus 20 installed in the latent heat treatment capacity insufficient space R1 is caused to execute the cooling water temperature lowering process while the cooling water amount increasing process is being executed (step # 32). Then, in the cooling coil 22 of the sensible heat treatment apparatus 20, the temperature of the cooling water CW decreases while maintaining the state in which the flow rate of the cooling water CW is increased, so the cooling temperature of the air further decreases. Further, cooling and dehumidification of the supply air SA is further achieved.

When the indoor humidity measured by the humidity sensor 25 does not become the fifth set humidity or lower during the execution of the cooling water temperature lowering process (No in Step # 33), the process before Step # 32 is performed. Returning to step 4, the cooling water temperature lowering process and the like being continued are continued to further reduce the humidity.
On the other hand, when the indoor humidity measured by the humidity sensor 25 is equal to or lower than the fifth set humidity during the execution of the cooling water temperature lowering process (Yes in step # 33), the current cooling water temperature lowering process is performed. The process ends (step # 31) and returns to the previous step # 23, and steps # 24 to # 25 are executed to determine whether or not the cooling water amount increasing process is necessary.

  Here, the fifth set humidity used in the determination in step 33 is larger than the third set humidity used in the determination in step # 25 and smaller than the fourth set humidity used in the determination in step # 24. (That is, there is a relationship of 3rd set humidity <5th set humidity <4th set humidity). Thereby, in step # 24, it is determined that the indoor humidity is equal to or higher than the fourth set humidity (Yes in step # 24), and immediately after the cooling water temperature lowering process is started (step # 32), the indoor humidity is increased in step # 33. It can be avoided that the cooling water temperature lowering process is ended (step # 31) when it is determined that the humidity is equal to or lower than the fifth set humidity (Yes in step # 33). Further, immediately after it is determined in step # 33 that the indoor humidity is equal to or lower than the fifth set humidity (Yes in step # 33) and the cooling water temperature lowering process is finished (step # 31), the indoor humidity is increased in step # 25. It is also possible to avoid a case where it is determined that the humidity is equal to or lower than 3 set humidity (YES in Step # 25) and the cooling water amount increasing process is terminated without being continued (Step # 21).

[Another embodiment]
(1) In the above embodiment, the example in which the cooling water CW is used as the refrigerant to be supplied to the latent heat treatment apparatus 10 and the sensible heat treatment apparatus 20 has been described, but the present invention is not limited to this configuration, and another refrigerant May be used.

(2) In the above-described embodiment, the chiller 30 that supplies the cooling water CW to the latent heat treatment apparatus 10 and the chiller 35 that supplies the cooling water CW to the sensible heat treatment apparatus 20 are configured separately. For example, the cooling water may be supplied to the latent heat treatment apparatus 10 and the sensible heat treatment apparatus 20 from the same chiller. When cooling water is supplied from the same chiller in this way, the return cooling water from the latent heat treatment apparatus 10 is used as the outgoing cooling water for the sensible heat treatment apparatus 20, or the return cooling water from the sensible heat treatment apparatus 20 is used. A so-called cascade system may be employed such as use as cooling water for the outgoing heat treatment apparatus 10.

(3) In the above embodiment, in the space R1 with insufficient latent heat treatment capacity, during the execution of the air flow rate reduction process, the cooling is lower in priority than the air flow rate reduction process using the indoor humidity and the room temperature of the space R1. Although it has been determined whether or not to execute the water amount increasing process and the cooling water temperature decreasing process, it may be determined in another form, for example, when the air flow rate decreasing process is continuously executed for a certain time or more. The cooling water amount increasing process and the cooling water temperature lowering process having a low priority may be executed.

(4) In the above embodiment, the dehumidifying process for dehumidifying the air and supplying it to the air-conditioning target space R is a latent heat treatment, and the cooling process for cooling the air by heat exchange with the refrigerant and supplying it to the air-conditioned target space R is a sensible heat treatment However, when the humidification process that humidifies the air and supplies it to the air-conditioning target space R is a latent heat treatment, and the heating process that heats the air by heat exchange with the heating medium and supplies it to the air-conditioning target space R is a sensible heat treatment However, the air conditioning system of the present invention can be employed.

(5) In the above embodiment, when there are a plurality of air conditioning target spaces R, the latent heat treatment apparatus 10 distributes and supplies the supply air SA to the plurality of air conditioning target spaces R, and the sensible heat treatment is performed in each of the air conditioning target spaces R. Although the example which arrange | positions the apparatus 20 was demonstrated, even if it is a case where a latent heat processing apparatus and a sensible heat processing apparatus are arrange | positioned with respect to the single air-conditioning object space R, the air conditioning system of this invention is employable.

(6) In the said embodiment, although the latent heat processing apparatus 10 was comprised as a desiccant-type dehumidification apparatus, you may employ | adopt the cooling dehumidification which cools and dehumidifies air below a dew point.

10 latent heat treatment apparatus 20 sensible heat treatment apparatus 41 latent heat treatment capability deficiency detection means 42 latent heat supplement treatment means 100 air conditioning system R air conditioning target space R1 latent heat treatment capacity deficiency space

Claims (6)

An air conditioning system comprising a latent heat treatment apparatus for performing a latent heat treatment of an air conditioning target space and a sensible heat treatment apparatus for performing a sensible heat treatment of the air conditioning target space,
The sensible heat treatment apparatus is configured to be able to perform a latent heat treatment of the air-conditioning target space,
A latent heat treatment capability deficiency detecting means for detecting the occurrence of a latent heat treatment capability deficiency state in which there is a deficiency in the latent heat treatment capability of the latent heat treatment apparatus with respect to the latent heat load of the air conditioning target space;
When the latent heat treatment capacity shortage detecting means detects a latent heat treatment capacity shortage state, the latent heat treatment processing means causes the sensible heat treatment apparatus to perform the latent heat treatment and supplements the shortage with the latent heat treatment capacity of the sensible heat treatment apparatus. Air conditioning system equipped with. The latent heat treatment apparatus is configured to distribute and supply conditioned air after treatment to a plurality of air conditioning target spaces,
The sensible heat treatment apparatus is arranged in each of the plurality of air-conditioning target spaces, and is configured to supply processed air-conditioned air to the arranged air-conditioning target spaces,
The latent heat treatment capacity shortage detecting means identifies the air conditioning target space in the latent heat treatment capacity shortage state among the plurality of air conditioning target spaces as the latent heat treatment capacity shortage space,
The air conditioning system according to claim 1, wherein the latent heat supplement processing means causes the sensible heat treatment apparatus installed in the specified latent heat treatment capacity deficient space to perform latent heat treatment. The latent heat treatment is a dehumidifying process that dehumidifies air and supplies the air-conditioned space,
The sensible heat treatment is a cooling process for cooling the air by heat exchange with the refrigerant and supplying the air to the air-conditioned space,
The sensible heat treatment apparatus, as the dehumidifying process, reduces the air flow rate during the cooling process to decrease the air cooling temperature, and increases the refrigerant flow rate during the cooling process to increase the air cooling temperature. The air conditioning system according to claim 1, wherein the air conditioning system is configured to be capable of executing at least one of a refrigerant flow rate increasing process to be reduced. The sensible heat treatment apparatus is configured to be able to execute the air flow rate reduction process and the refrigerant flow rate increase process as the dehumidification process,
4. The air flow rate reduction process is executed in preference to the refrigerant flow rate increase process when the latent heat supplement processing means detects a latent heat treatment capacity shortage state by the latent heat treatment capacity shortage detection means. Air conditioning system.   The latent heat supplement processing means executes the air flow rate reduction process when the latent heat treatment capacity shortage detection means detects a latent heat treatment capacity shortage state, and the temperature of the air-conditioning target space is changed during the execution of the air flow rate reduction process. The air conditioning system according to claim 4, wherein when the temperature becomes equal to or higher than a predetermined threshold temperature, the air flow rate reduction process is stopped and the refrigerant flow rate increase process is executed.   The latent heat supplement processing means executes the air flow rate reduction process when the latent heat treatment capacity shortage detection means detects a latent heat treatment capacity shortage state, and the humidity of the air-conditioning target space is reduced during the execution of the air flow rate reduction process. The air conditioning system according to claim 4 or 5, wherein the refrigerant flow rate increasing process is executed while the execution of the air flow rate decreasing process is continued when a predetermined threshold humidity is exceeded.

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