JP6782610B2 - Air conditioning system - Google Patents

Description

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

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

In the air conditioning system described in Patent Document 1, a ventilation unit for supplying outdoor air to the room and exhausting the indoor air to the outside is provided as the latent heat treatment device, and the ventilation unit is provided in the air by a desiccant rotor. It is configured to treat the latent heat load by dehumidifying the supply air supplied to the room by the action of absorbing and desorbing water. Further, in the air conditioning system described in the same document, an indoor unit is provided as the above-mentioned sensible heat treatment device, and the indoor unit cools the indoor air by heat exchange with a refrigerant to process the sensible heat load. The room air is cooled and dehumidified to handle the latent heat load.

In the air conditioning system described in Patent Document 1 configured in this way, when both the sensible heat load and the latent heat load during the cooling operation are large, the sensible heat load due to the dehumidifying heat of the desiccant rotor being supplied to the room. In order to avoid a further increase in the amount of heat, the dehumidifying operation is performed by cooling the indoor air in the indoor unit as a sensible heat treatment device, instead of performing the dehumidifying operation by the action of absorbing and removing water from the desiccant rotor in the ventilation device. (See paragraphs 0032 and 0033 of Patent Document 1, and FIG. 3 and the like).

In the air conditioning system described in Patent Document 2, a humidity control device that mainly performs latent heat treatment of the indoor space is provided as the latent heat treatment device, and this humidity control device is adsorbed by the refrigerant evaporating in the adsorption heat exchanger. By cooling the agent and adsorbing the moisture in the air to the adsorbent, the supply air supplied to the indoor space is dehumidified and the latent heat load is treated. Further, in the air conditioner system described in the same document, an air conditioner that mainly performs sensible heat treatment of the indoor space is provided as the sensible heat treatment device, and this air conditioner performs the compression refrigeration cycle operation of the indoor space. In addition to processing the sensible heat load by performing air conditioning, it is configured to be able to process the latent heat load by cooling and dehumidifying the indoor air by heat exchange with the refrigerant.

In the air conditioning system described in Patent Document 2 configured in this way, the amount of latent heat treatment processed by the humidity control device as the latent heat treatment device and the amount of latent heat treatment processed by the air conditioner as the latent heat treatment device are determined. , It is configured to be appropriately controlled so as to minimize the overall power consumption (see paragraphs 0109 to 0123 of Patent Document 2 and the like).

JP-A-2010-255973 Japanese Unexamined Patent Publication No. 2012-07748

In an air conditioning system equipped with a latent heat treatment device and a micro heat treatment device, if the latent heat load temporarily increases due to an increase in the number of people in the air-conditioned space, the latent heat load should be sufficiently treated. In order to maintain the comfort of the air-conditioned space, it becomes necessary to set the latent heat treatment amount of the latent heat treatment device to a relatively large amount as the amount increases.

For example, as in the air conditioner 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 latent heat load is processed by performing the dehumidifying operation only with the sensible heat treatment device. However, as described in paragraphs 0030, 0034 and FIG. 3 of the same document, when the sensible heat load is relatively small, the latent heat load is processed only by the latent heat treatment device as usual. In addition, when the latent heat load temporarily increases, the amount of latent heat treatment of the latent heat treatment apparatus is set to a relatively large amount accordingly.
On the other hand, as in the air conditioning system described in Patent Document 2 described above, the latent heat also controls the latent heat treatment amount of the latent heat treatment device and the latent heat treatment amount of the micro heat treatment device for the purpose of minimizing the overall power consumption. Since the ratio of the load on the latent heat treatment device to the latent heat load is determined regardless of the magnitude of the load, it is necessary to set the latent heat treatment amount of the latent heat treatment device to a relatively large amount.

In order to maintain the comfort of the air-conditioned space by setting the latent heat treatment amount of the latent heat treatment device to a relatively large value, the latent heat treatment capacity of the latent heat treatment device is set to such a temporary latent heat load. It is necessary to make a decision with a large margin so that it can cope with the increase, and there is a concern that the latent heat treatment equipment will be increased in size and energy saving will be deteriorated. Further, even if the latent heat treatment apparatus performs cooling dehumidification to process the latent heat load, it is necessary to extremely lower the cooling temperature in order to increase the latent heat treatment capacity, so that there is a concern that energy saving may be deteriorated.

In view of this situation, a main subject of the present invention is miniaturization 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 microheat treatment apparatus that performs subclinical heat treatment of the air conditioning target space. Moreover, the point is to provide a technology capable of maintaining the comfort of the air-conditioned space while realizing energy saving.

The first characteristic configuration of the present invention is an air conditioning system including a latent heat treatment device that performs latent heat treatment of the air conditioning target space and a micro heat treatment device that performs micro heat treatment of the air conditioning target space.
The microheat treatment device is configured to be capable of performing latent heat treatment in the air-conditioned space.
A means for detecting the lack of latent heat treatment capacity, which detects the occurrence of a state of insufficient latent heat treatment capacity, which causes a shortage of the latent heat treatment capacity of the latent heat treatment apparatus with respect to the latent heat load of the space to be air-conditioned.
When the latent heat treatment capacity deficiency detecting means detects a latent heat treatment capacity deficiency state, the latent heat treatment apparatus is made to perform latent heat treatment, and the deficiency is supplemented by the latent heat treatment capability of the latent heat treatment apparatus. Equipped with
The latent heat treatment is a dehumidifying treatment that dehumidifies air and supplies it to the air-conditioned space.
The microheat treatment is a cooling process in which air is cooled by heat exchange with a refrigerant and supplied to an air-conditioned space.
As the dehumidifying treatment, the microheat treatment apparatus reduces the air flow rate during the cooling process to lower the cooling temperature of the air, and increases the refrigerant flow rate during the cooling process to increase the cooling temperature of the air. It is configured to be able to execute the refrigerant flow increase processing to reduce it.
When the latent heat supplement processing means detects a state of insufficient latent heat treatment capacity by the latent heat treatment capacity deficiency detecting means, the air flow rate decreasing process is preferentially executed over the refrigerant flow rate increasing process .

According to this configuration, when the latent heat treatment capacity insufficient detection means detects the latent heat treatment capacity insufficient state, the latent heat supplement processing means is activated and the latent heat treatment capacity shortage of the latent heat treatment device with respect to the latent heat load of the air-conditioned space is insufficient. Can be complemented by latent heat treatment with a micro heat treatment device. As a result, the latent heat load of the space to be air-conditioned is coordinated by the latent heat treatment device and the microheat treatment device while suppressing the latent heat treatment capacity of the latent heat treatment device as low as possible and realizing miniaturization and energy saving of the latent heat treatment device. It is possible to obtain the comfort of the air-conditioned space by sufficiently treating the latent heat treatment capacity.
Further, according to this configuration, when the dehumidifying treatment is executed as the latent heat treatment by the latent heat treatment apparatus and the cooling treatment is executed as the acute heat treatment by the latent heat treatment apparatus, the air flow rate is reduced with respect to the latent heat treatment apparatus. With a simple and rational configuration of executing a flow rate decreasing process or a refrigerant flow rate increasing process of increasing the refrigerant flow rate, a dehumidifying process of dehumidifying the air by lowering the cooling temperature of the refrigerant below the dew point can be executed as latent heat treatment. it can.
Further, according to this configuration, when the latent heat treatment apparatus is subjected to the dehumidification treatment when the latent heat treatment capacity is detected, the air flow rate reduction process that does not accompany the increase in the refrigerant flow rate is performed, and the refrigerant that accompanies the increase in the refrigerant flow rate. Since the process is executed with priority over the flow rate increasing process, it is possible to suppress an increase in the transfer power of the refrigerant from the heat source machine to the microheat treatment device as much as possible and improve energy saving.

The second characteristic configuration of the present invention is such that the latent heat treatment apparatus distributes and supplies the treated air-conditioned air to a plurality of air-conditioned spaces.
The microheat treatment apparatus is arranged in each of the plurality of air-conditioned spaces, and is configured to supply the treated air-conditioned air to the arranged air-conditioned spaces.
The latent heat treatment capacity shortage detecting means identifies the air conditioning target space in which the latent heat treatment capacity is insufficient among the plurality of air conditioning target spaces as the latent heat treatment capacity insufficient space.
The point is that the latent heat complementary treatment means causes the latent heat treatment apparatus installed in the specified space where the latent heat treatment capacity is insufficient to perform latent heat treatment.

According to this configuration, in a configuration in which the latent heat treatment device is arranged in each of the plurality of air conditioning target spaces in which the latent heat treatment device distributes and supplies the conditioned air, in a part of the plurality of air conditioning target spaces where the latent heat treatment capacity is insufficient. Even when a state of insufficient latent heat treatment ability occurs, it is possible to identify the space where the latent heat treatment capacity is insufficient and to have a microheat treatment apparatus installed in the space where the latent heat treatment capacity is insufficient perform latent heat treatment. As a result, the latent heat treatment capacity of the latent heat treatment apparatus can be suppressed as low as possible, and the size of the latent heat treatment apparatus and the deterioration of energy saving can be suppressed. Furthermore, in some spaces with insufficient latent heat treatment capacity, the shortage of latent heat treatment capacity is supplemented by latent heat treatment by a micro heat treatment device installed in the space with insufficient latent heat treatment capacity to eliminate the insufficient latent heat treatment capacity and make it comfortable. In addition to being able to obtain the property, it is possible to suppress excessive latent heat treatment by the latent heat treatment device and prevent deterioration of comfort even in an air-conditioned space other than the space where the latent heat treatment capacity is insufficient.

The third characteristic configuration of the present invention is that when the latent heat complement processing means detects a state of insufficient latent heat treatment capacity by the latent heat treatment capacity insufficient detection means, the air flow rate reduction process is executed and the air flow rate reduction process is executed. The point is that when the temperature of the air-conditioned space becomes equal to or higher than a predetermined threshold temperature, the air flow rate decreasing process is stopped and the refrigerant flow rate increasing process is executed.

According to this configuration, the amount of cold air supplied from the microheat treatment device to the air-conditioned space is reduced by executing the air flow rate reduction process, so that the temperature of the air-conditioned space to which the cold air is supplied becomes equal to or higher than the threshold temperature. In this case, the air flow rate decreasing process can be stopped and the refrigerant flow rate increasing process can be performed without reducing the supply amount of cold air. As a result, 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 latent heat treatment apparatus while suppressing the temperature rise above the threshold temperature of the air conditioning target space.

The fourth characteristic configuration of the present invention is that when the latent heat complement processing means detects a state of insufficient latent heat treatment capacity by the latent heat treatment capacity insufficient detection means, the air flow rate reduction process is executed and the air flow rate reduction process is executed. The point is that when the humidity of the air-conditioned space becomes equal to or higher than a predetermined threshold humidity, the refrigerant flow rate increasing process is executed while continuing the execution of the air flow rate decreasing process.

According to this configuration, when the state of insufficient latent heat treatment capacity is detected and the humidity of the air-conditioned space becomes equal to or higher than the threshold humidity and does not decrease sufficiently during the execution of the air flow rate reduction process, the air flow rate reduction process is performed. In addition, the refrigerant flow rate increase process is executed in parallel, and the air whose flow rate has been reduced is sufficiently cooled below the dew point and dehumidified by heat exchange with the refrigerant whose flow rate has been increased. It is possible to supply air having a sufficiently low humidity to the air-conditioned space to promote the decrease in humidity of the air-conditioned space, and to solve the state of insufficient latent heat treatment capacity in the air-conditioned space reliably and quickly.
The fifth characteristic configuration of the present invention is a cooling process in which the microheat treatment cools air by heat exchange with cooling water as a refrigerant and supplies the air to the air-conditioned space.
As the dehumidifying treatment, the microheat treatment apparatus can execute a cooling water amount increasing treatment for increasing the cooling water flow rate during the cooling treatment and lowering the cooling temperature of air as the refrigerant flow rate increasing treatment, and cooling during the cooling treatment. It is configured to be able to perform a cooling water temperature lowering process that lowers the water temperature and lowers the cooling temperature of the air.
When the latent heat complementary treatment means detects a state of insufficient latent heat treatment capacity by the means for detecting the lack of latent heat treatment capacity, the cooling water amount increasing treatment is preferentially executed over the cooling water temperature lowering treatment.

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]
The first embodiment of the air conditioning system according to the present invention will be described with reference to the drawings.
The air-conditioning system 100 shown in FIG. 1 is provided in a facility having a plurality of air-conditioning target spaces R, such as a commercial facility or an office building, and mainly performs a submarine heat treatment of the air-conditioning target space R, and mainly A micro-heat treatment device 20 that performs micro-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 devices 10 and 20 are provided. ing.

The latent heat treatment device 10 distributes and supplies the outside air OA taken in from the outdoor O by the blowing power of the air supply fan 11 to a plurality of air-conditioned spaces R through the air supply duct 1 as the supply air SA, and also by the blowing power of the exhaust fan 13. The indoor air RA taken in from the plurality of air-conditioned spaces R through the exhaust duct 2 is configured to be discharged to the outdoor O as the exhaust EA.

Further, the latent heat treatment device 10 is configured as a desiccant type dehumidifying device including a desiccant rotor 14 capable of dehumidifying the outside air OA and supplying the treated conditioned air to a plurality of air-conditioned spaces R.

Specifically, in the latent heat treatment apparatus 10, the so-called dehumidifying treatment (latent heat treatment) in which the outside air OA taken in from the outdoor O is passed through the desiccant rotor 14 and the moisture is adsorbed on the desiccant rotor 14 to dehumidify to the set humidity. An example) is executed. Further, since the outside air OA after dehumidification is heated by the heat of adsorption of the desiccant rotor 14, the outside air OA is passed through the cooling coil 12 and the low temperature cooling water CW (Chiller 30) supplied from the chiller 30. It is cooled by heat exchange with an example of a refrigerant). Then, the cooled outside air OA is distributed and supplied to the plurality of air-conditioned spaces R through the air supply duct 1 as the supply air SA.

On the other hand, in the latent heat treatment apparatus 10, the indoor air RA taken in from the plurality of air-conditioned spaces R through the exhaust duct 2 is appropriately heated by the regenerator 15 and then passed through the desiccant rotor 14. As a result, the water contained in the desiccant rotor 14 is released, and the desiccant rotor 14 is regenerated. Then, the indoor air RA containing the moisture is discharged to the outdoor O as an exhaust EA.
In the present embodiment, the latent heat treatment device 10 is configured as a desiccant type dehumidifying device, but the present invention is not limited to this configuration. For example, a cooling type that cools the outside air OA below the dew point to dehumidify. It may be configured as a dehumidifying device.

On the other hand, the microheat treatment apparatus 20 is individually arranged in each of the plurality of air-conditioned spaces R, and is configured as a fan coil unit that cools the indoor air RA and supplies the treated air-conditioned air to the air-conditioned space R. There is.

Specifically, in the microheat treatment apparatus 20, the indoor air RA taken in from the air-conditioned space R by the blowing 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 is passed. A so-called cooling process (an example of microthermal treatment) of cooling to a set temperature by heat exchange with (an example) is executed. Then, the cooled indoor air RA is supplied to the air conditioning target space R as an air supply SA.

Further, in the microheat treatment apparatus 20, a so-called dehumidifying treatment (an example of latent heat treatment) is executed in which the cooling coil 22 cools the indoor air RA to a dew point or less lower than the set temperature according to a command from the control apparatus 40. Will be done. Although the details will be described later, the dehumidifying treatment executed by the microheat treatment apparatus 20 includes an air flow rate decreasing treatment and a cooling water amount increasing treatment (an example of a refrigerant flow rate increasing treatment), and each of these treatments is performed independently or in parallel. It is configured to be executable.

The air flow rate reduction process executed in the microheat treatment apparatus 20 reduces the air flow rate during the cooling process, for example, by setting the air flow rate of the fan 21 to a smaller air flow rate for latent heat treatment than the set air flow rate at the normal time. This is a process of lowering the cooling temperature of air by the cooling coil 22.
By executing such an air flow rate reduction process, in the microheat treatment apparatus 20, the flow rate of the indoor air RA cooled by the cooling water CW in the cooling coil 22 is reduced, so that the temperature of the indoor air RA after cooling ( Cooling temperature) will decrease. Then, when the cooling temperature of the indoor air RA becomes equal to or lower than the dew point of the same air, the indoor air RA can be cooled and dehumidified and supplied to the air conditioning target space R as air supply SA.

The cooling water amount increasing process executed in the microheat treatment apparatus 20 is, for example, in the form of expanding the opening degree of the adjusting valve 23 capable of adjusting the cooling water supply amount to the cooling coil 22, and the cooling water flow rate (refrigerant) during the cooling process. This is a process of increasing the flow rate) to lower the cooling temperature of the air by the cooling coil 22.

By executing such a cooling water amount increasing process, in the microheat treatment apparatus 20, the flow rate of the cooling water CW for cooling the indoor air RA in the cooling coil 22 increases, so that the temperature of the indoor air RA after cooling is increased. (Cooling temperature) will decrease. Then, when the cooling temperature of the indoor air RA becomes equal to or lower than the dew point of the same air, the indoor air RA can be cooled and dehumidified and supplied to the air conditioning target space R as air supply SA.

Each air-conditioned space R is provided with a temperature sensor 24 for measuring the actual indoor temperature (dry-bulb temperature) and a humidity sensor 25 for measuring the actual indoor humidity (relative humidity). Regarding the number of temperature sensors 24 and humidity sensors 25 installed in one air-conditioned space R, although only one is installed in FIG. 1, a plurality of temperature sensors 24 and humidity sensors 25 may be installed respectively. .. Further, when a plurality of detected values are installed, the average value or the representative value of each detected value can be treated as a measured value.

Then, the control device 40 functions as a means for executing operation control of the latent heat treatment device 10 and the latent heat treatment device 20 by utilizing the measurement results of the temperature sensor 24 and the humidity sensor 25, and further, detection of insufficient latent heat treatment ability. It also functions as the means 41 and the latent heat complement processing means 42.
That is, the latent heat treatment capacity deficiency detecting means 41 is configured as a means for detecting the occurrence of a latent heat treatment capacity deficiency 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 complement processing means 42 detects the latent heat treatment capacity insufficient state by the latent heat treatment capacity shortage detecting means 41, the latent heat treatment apparatus 20 is made to execute the latent heat treatment, and the latent heat treatment capacity of the latent heat treatment apparatus 10 is insufficient. It is configured as a means to supplement the minutes with the latent heat treatment capacity of the microheat treatment apparatus 20.

The air conditioning system 100 of the present embodiment is provided with such a latent heat treatment capacity shortage detecting means 41 and a latent heat complementary processing means 42, so that the space to be air-conditioned can be realized while the latent heat treatment apparatus 10 is miniaturized and energy saving. The comfort of R can be maintained.
Hereinafter, in addition to the detailed configurations of the latent heat treatment capacity shortage detecting means 41 and the latent heat complementing processing means 42, the 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 initial setting (step # 01) to set a set temperature (an example of a threshold temperature), a set humidity (an example of a threshold humidity), and the like used in various processes described later. Then, the latent heat treatment (dehumidification) by the latent heat treatment apparatus 10 and the microheat treatment (cooling) by the microheat treatment apparatus 20 are started (step # 02). As a result, the air supply SA dehumidified by the latent heat treatment device 10 is distributed and supplied to each air conditioning target space R, and in each air conditioning target space R, the indoor air RA is cooled to a set temperature by the microheat treatment device 20. It will be.

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

When it is determined that the space R1 having insufficient latent heat treatment capacity does not exist (No in step # 04), the latent heat complement processing means 42 as described later does not operate, and this flow ends. However, when it is determined that the latent heat treatment capacity insufficient space R1 exists (Yes in step # 04), the latent heat complement processing means 42 operates, and the microheat treatment apparatus 20 installed in the latent heat treatment capacity insufficient space R1 operates. On the other hand, at least one of the above-mentioned air flow rate decreasing treatment and cooling water amount increasing treatment is performed.

Here, the latent heat complementary treatment means 42 will be described in detail later, but when the latent heat treatment apparatus 20 installed in the space R1 having insufficient latent heat treatment capacity is subjected to the latent heat treatment, the air flow rate reduction treatment is performed on the cooling water amount. It is configured to be executed with priority over the increase process. With this configuration, the frequency of execution of the cooling water amount increasing treatment accompanied by the increase in the transport power of the cooling water CW from the chiller 35 to the microheat treatment apparatus 20 is suppressed, and the energy saving property is improved.

Specifically, when it is determined that there is the latent heat treatment capacity insufficient space R1 (Yes in step # 04), the microheat treatment apparatus 20 installed in the latent heat treatment capacity insufficient space R1 is made to execute the air flow rate reduction process. (Step # 12). Then, the cooling temperature of the air is lowered by reducing the flow rate of the air cooled by the cooling water CW in the cooling coil 22 of the microheat treatment apparatus 20, and the air supply SA is cooled and dehumidified.

Then, in the space R1 where the latent heat treatment capacity is insufficient, when the indoor humidity measured by the humidity sensor 25 becomes equal to or lower than the first set humidity during the execution of the air flow rate reduction process by the micro heat treatment apparatus 20 (Yes in step # 13). The process of reducing the air flow rate during execution is terminated on the assumption that the state of insufficient latent heat treatment capacity in the space R1 having insufficient latent heat treatment capacity has been resolved (step # 11). Then, returning to the step before step # 03 described above, the measurement of the indoor humidity in step # 03 and the determination of the presence / absence of the latent heat treatment capacity insufficient space R1 in step # 04 are performed again.

On the contrary, when the indoor humidity measured by the humidity sensor 25 does not fall below the first set humidity (No in step # 13) during the execution of the air flow rate reduction process, the set temperature and the second set humidity are met. Judgment regarding the state of room temperature and room humidity (step # 14 and step # 15) is performed.
Then, when the indoor temperature measured by the temperature sensor 24 is not equal to or higher than the set temperature (No in step # 14), and the indoor humidity measured by the humidity sensor 25 is used in the determination in step # 13. If the humidity is not equal to or higher than the second set humidity set slightly higher than the first set humidity (No in step # 15), the process returns to the previous step # 12 to continue the air flow rate reduction process being executed, and further humidity. It will be reduced.

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

On the other hand, when the indoor humidity measured by the humidity sensor 25 does not fall below the first set humidity (No in step # 13) during the execution of the air flow rate reduction process, the indoor temperature measured by the temperature sensor 24 becomes When the temperature is equal to or higher than the set temperature (Yes in step # 14), the room temperature of the space R1 having insufficient latent heat treatment capacity becomes comfortable because the micro heat treatment capacity of the micro heat treatment apparatus 20 is lowered by executing the air flow rate reduction treatment. It is probable that the temperature has risen above the set temperature to be maintained. Therefore, in this case, after finishing the air flow rate reduction process during execution (step # 22), the microheat treatment apparatus 20 installed in the space R1 where the latent heat treatment capacity is insufficient is made to execute the cooling water amount increase process (step # 22). 23). Then, in the cooling coil 22 of the microheat treatment apparatus 20, the flow rate of air cooled by the cooling water CW is increased and returns to the original flow rate, but the cooling temperature of the air is lowered due to the increase in the flow rate of the cooling water CW. Then, the air supply SA will be cooled and dehumidified.

When the indoor temperature measured by the temperature sensor 24 is not equal to or higher than the set temperature (No in step # 14), and when the indoor 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 of the microheat treatment apparatus 20, the microheat treatment apparatus 20 installed in the space R1 where the latent heat treatment capacity is insufficient is subjected to the cooling water amount increase treatment while the air flow rate reduction treatment is being executed (step). # 23). Then, in the cooling coil 22 of the microheat treatment apparatus 20, the flow rate of the cooling water CW increases while maintaining the state in which the flow rate of the air cooled by the cooling water CW is reduced. As a result, the cooling temperature of the air in the cooling coil 22 is further lowered, and the cooling and dehumidifying of the air supply SA is further achieved.

If the indoor humidity measured by the humidity sensor 25 does not fall below the third set humidity (No in step # 25) during the execution of this cooling water amount increasing process, the process returns to before step # 23 and is being executed. The treatment for increasing the amount of cooling water in the above will be continued to further reduce the humidity.
If the indoor humidity measured by the humidity sensor 25 becomes equal to or lower than the third set humidity (Yes in step # 25) during the execution of the cooling water amount increasing process, the executing cooling water amount increasing process is terminated. (Step # 21), the process returns to the previous step # 13, and steps # 13 to # 15 are executed to determine whether or not the air flow rate reduction process should be executed.

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 smaller than the second set humidity used in the determination in step # 15. It is set within the range (that is, it has a relationship of first set humidity <third set humidity <second set humidity). As a result, immediately after the indoor humidity is determined to be equal to or higher than the second set humidity in step # 15 (Yes in step # 15) and the cooling water amount increasing process is started (step # 23), the indoor humidity is set to the second in step # 25. 3 It is possible to avoid that the humidity is determined to be equal to or lower than the set humidity (Yes in step # 25) and the cooling water amount increasing process is completed (step # 21). Further, 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 completed (step # 21), the indoor humidity is first in step # 13. It is also possible to avoid that the humidity is determined to be equal to or lower than the set humidity (YES in step # 13) and the air flow rate reduction process is not continued and is terminated (step # 11).

[Second Embodiment]
In the first embodiment, as the latent heat treatment that can be performed by the microheat treatment apparatus 20, at least one of the air flow rate reduction treatment and the cooling water amount increase treatment is executed, but a latent heat treatment different from these treatments is performed. It may be configured so as to be feasible in a microheat treatment apparatus. For example, as the latent heat treatment that can be performed by such a microheat treatment device 20, the temperature of the cooling water CW supplied from the chiller 35 to the cooling coil 22 of the microheat treatment device 20 is lowered to cool the air by the cooling coil 22. Examples thereof include cooling water temperature lowering treatment for lowering the temperature.
Hereinafter, as a second embodiment of the air conditioning system according to the present invention, a configuration in which the microheat treatment apparatus 20 executes the air flow rate reduction process, the cooling water amount increase process, and the cooling water temperature decrease process will be described.

Since the air-conditioning system of the present embodiment has the same basic configuration as the air-conditioning system 100 of the first embodiment (see FIG. 1), the description thereof is omitted, but the microheat treatment apparatus 20 performs air flow reduction processing and cooling water amount. The increasing treatment and the cooling water temperature lowering treatment can be performed independently or in parallel. With this configuration, even if the latent heat treatment capacity deficiency state in the space R1 is not resolved even if the air flow rate reduction treatment or the cooling water amount increase treatment is executed, the cooling water temperature reduction treatment is executed. Therefore, the state of insufficient latent heat treatment ability can be surely resolved.

Further, when the latent heat treatment capacity deficiency detecting means 41 detects the latent heat treatment capacity deficiency state, the air flow rate reduction treatment is executed with priority over the cooling water amount increase treatment, and further, the cooling water amount increase treatment is performed. Priority is given to the above-mentioned cooling water temperature lowering treatment. With this configuration, the frequency of execution of the cooling water amount increase treatment accompanying the increase in the transport power of the cooling water CW from the chiller 35 to the microheat treatment apparatus 20 is suppressed, the cooling load of the chiller 35 is increased, and the cooling water CW transport piping is suppressed. Since the frequency of execution of the cooling water temperature lowering treatment accompanied by the increase in the amount of heat dissipated in the water is further suppressed, the energy saving property is improved.

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

When the indoor humidity measured by the humidity sensor 25 is not equal to or higher than the 4th set humidity set slightly larger than the 3rd set humidity used in the determination of step # 25 during the execution of the cooling water amount increasing process (step). In # 24 No), if the humidity in the room does not fall below the third set humidity (No in step # 25), the process returns to the previous step # 23 to continue the cooling water amount increasing process being executed. , 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 (No in step # 24) during the execution of the cooling water amount increasing process, the indoor humidity is equal to or lower than the third set humidity. In the case (Yes in step # 25), the process of increasing the amount of cooling water being executed is completed (step # 21), the process returns to the step # 13 described above, and steps # 13 to # 15 are executed to execute the air flow rate. It will be judged whether or not the reduction process should be executed.

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

Then, when the indoor humidity measured by the humidity sensor 25 does not fall below the fifth set humidity (No in step # 33) during the execution of the cooling water temperature lowering process in this way, before step # 32. The cooling water temperature lowering treatment, etc., which is being executed will be continued to further reduce the humidity.
On the other hand, if the indoor humidity measured by the humidity sensor 25 becomes equal to or lower than the fifth set humidity (Yes in step # 33) during the execution of the cooling water temperature lowering process, the executing cooling water temperature lowering process is performed. When the process is completed (step # 31), the process returns to the step # 23 described above, and steps # 24 to # 25 are executed to determine whether or not the cooling water amount increasing process should be executed.

Here, the fifth set humidity used in the determination in step 33 is a range 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 third set humidity <fifth set humidity <fourth set humidity). As a result, immediately after the indoor humidity is determined to be equal to or higher than the fourth set humidity in step # 24 (Yes in step # 24) and the cooling water temperature lowering process is started (step # 32), the indoor humidity is increased in step # 33. It is possible to prevent the cooling water temperature lowering process from being terminated (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 the indoor humidity is determined to be equal to or lower than the fifth set humidity in step # 33 (Yes in step # 33) and the cooling water temperature lowering process is completed (step # 31), the indoor humidity is set to the fifth in step # 25. 3 It is possible to avoid that the humidity is determined to be equal to or lower than the set humidity (YES in step # 25) and the cooling water amount increasing process is not continued and is terminated (step # 21).

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

(2) In the above embodiment, the chiller 30 that supplies the cooling water CW to the latent heat treatment device 10 and the chiller 35 that supplies the cooling water CW to the microheat treatment device 20 are configured as different ones. The configuration is not limited, and for example, cooling water may be supplied from the same chiller to the latent heat treatment apparatus 10 and the microheat treatment apparatus 20. Further, when the cooling water is supplied from the same chiller in this way, the return cooling water from the latent heat treatment device 10 is used as the forward cooling water of the micro heat treatment device 20, or the return cooling water from the micro heat treatment device 20 is used. A so-called cascade method such as that used as the cooling water for the latent heat treatment apparatus 10 may be adopted.

(3) In the above embodiment, in the space R1 having insufficient latent heat treatment capacity, cooling having a lower priority than the air flow rate reduction process is performed by using the indoor humidity and the room temperature of the space R1 during the execution of the air flow rate reduction process. It was decided whether or not to execute the water amount increase treatment or the cooling water temperature lowering treatment, but it may be decided in another form. For example, when the air flow rate reduction treatment is continuously executed for a certain period of time or longer, it may be decided. , The cooling water amount increasing treatment or the cooling water temperature lowering treatment having a low priority may be executed.

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

(5) In the above embodiment, when a plurality of air-conditioned spaces R are provided, the latent heat treatment device 10 distributes and supplies air supply SA to the plurality of air-conditioned spaces R, and microheat-resists the respective air-conditioned spaces R. Although the example of arranging the device 20 has been described, the air conditioning system of the present invention can be adopted even when the latent heat treatment device and the microheat treatment device are arranged in a single air conditioning target space R.

(6) In the above embodiment, the latent heat treatment device 10 is configured as a desiccant type dehumidifying device, but a cooling dehumidifying device that cools the air below the dew point to dehumidify may be adopted.

10 Latent heat treatment device 20 Subclinical heat treatment device 41 Latent heat treatment capacity shortage detection means 42 Latent heat complementary processing means 100 Air conditioning system R Air conditioning target space R1 Latent heat treatment capacity shortage space

Claims (5)

An air conditioning system including a latent heat treatment device that performs latent heat treatment of the air conditioning target space and a micro heat treatment device that performs micro heat treatment of the air conditioning target space.
The microheat treatment device is configured to be capable of performing latent heat treatment in the air-conditioned space.
A means for detecting the lack of latent heat treatment capacity, which detects the occurrence of a state of insufficient latent heat treatment capacity, which causes a shortage of the latent heat treatment capacity of the latent heat treatment apparatus with respect to the latent heat load of the space to be air-conditioned.
When the latent heat treatment capacity deficiency detecting means detects a latent heat treatment capacity deficiency state, the latent heat treatment apparatus is made to perform latent heat treatment, and the deficiency is supplemented by the latent heat treatment capability of the latent heat treatment apparatus. Equipped with
The latent heat treatment is a dehumidifying treatment that dehumidifies air and supplies it to the air-conditioned space.
The microheat treatment is a cooling process in which air is cooled by heat exchange with a refrigerant and supplied to an air-conditioned space.
As the dehumidifying treatment, the microheat treatment apparatus reduces the air flow rate during the cooling process to lower the cooling temperature of the air, and increases the refrigerant flow rate during the cooling process to increase the cooling temperature of the air. It is configured to be able to execute the refrigerant flow increase processing to reduce it.
An air conditioning system in which, when the latent heat supplement processing means detects a state of insufficient latent heat treatment capacity by the latent heat treatment capacity insufficient detecting means, the air flow rate decreasing process is executed in preference to the refrigerant flow rate increasing process . The latent heat treatment device is configured to distribute and supply the treated air-conditioned air to a plurality of air-conditioned spaces.
The microheat treatment apparatus is arranged in each of the plurality of air-conditioned spaces, and is configured to supply the treated air-conditioned air to the arranged air-conditioned spaces.
The latent heat treatment capacity shortage detecting means identifies the air conditioning target space in which the latent heat treatment capacity is insufficient among the plurality of air conditioning target spaces as the latent heat treatment capacity insufficient space.
The air conditioning system according to claim 1, wherein the latent heat complementary treatment means causes the latent heat treatment apparatus installed in the specified space where the latent heat treatment capacity is insufficient to perform latent heat treatment. When the latent heat supplement processing means detects a state of insufficient latent heat treatment capacity by the latent heat treatment capacity insufficient detection means, the air flow rate reduction process is executed, 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 1 or 2, wherein when the temperature exceeds a predetermined threshold temperature, the air flow rate decreasing process is stopped and the refrigerant flow rate increasing process is executed . When the latent heat supplement processing means detects a state of insufficient latent heat treatment capacity by the latent heat treatment capacity insufficient detection means, the air flow rate reduction process is executed, and the humidity of the air-conditioned space is reduced during the execution of the air flow rate reduction process. The air conditioning system according to any one of claims 1 to 3, wherein the air flow rate increasing process is executed while continuing the execution of the air flow rate decreasing process when the humidity becomes equal to or higher than a predetermined threshold humidity . The microheat treatment is a cooling process in which air is cooled by heat exchange with cooling water as a refrigerant and supplied to the air-conditioned space.
As the dehumidifying treatment, the microheat treatment apparatus can execute a cooling water amount increasing treatment for increasing the cooling water flow rate during the cooling treatment and lowering the cooling temperature of air as the refrigerant flow rate increasing treatment, and cooling during the cooling treatment. It is configured to be able to perform a cooling water temperature lowering process that lowers the water temperature and lowers the cooling temperature of the air.
Claims 1 to 4 for causing the cooling water amount increasing treatment to be executed in preference to the cooling water temperature lowering treatment when the latent heat complementary treatment means detects a latent heat treatment capacity shortage state by the latent heat treatment capacity shortage detecting means. The air conditioning system according to any one of the above items .

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