JP6420565B2 - Air conditioning system - Google Patents

Description

  The present invention relates to a central type air conditioner that circulates and supplies a heat medium from a heat source facility of a facility to an indoor unit installed in the air conditioning target area in the facility to adjust the temperature of the air conditioning target area, and an air conditioning target area by taking in outside air The present invention relates to an air conditioning system equipped with an external air conditioner for ventilation.

  This type of air conditioning system uses a central air conditioning system that uses heat source equipment such as cooling towers installed on the rooftop of the facility, etc., while efficiently adjusting the temperature of the air-conditioning target area in the facility, The outside air is introduced into the air-conditioning target area by the conditioner, and exhausted from the air-conditioning target area by the exhaust means or the like, thereby ventilating the air-conditioning target area (see, for example, Patent Document 1).

  By the way, in facilities such as shopping malls and supermarkets where a large number of people serving as heat sources visit, or production factories where a large number of production devices serving as heat sources exist, the heating load during operation of the facilities may be completely equal. . Therefore, in such an air conditioning system of a facility, the central type air conditioner is made a dedicated cooling unit that performs only cooling (that is, the temperature control function of the air conditioner is limited to the cooling function). To save energy in facilities.

JP 2006-145070 A

  Even in a facility that employs the air conditioning system as described above, the preparation work by the worker is performed in the air-conditioning target area in a time zone in which heat generation from the heat source such as the initial operation is not sufficient. However, at the beginning of operation in winter when the temperature is low, the temperature of the air-conditioning target area is too low to be suitable as a work environment for the worker, and there is a possibility that the work efficiency of the worker is reduced.

  In view of this situation, a main problem of the present invention is to provide an air conditioning system capable of appropriately performing air conditioning in an air conditioning target area corresponding to both a cooling load and a heating load while achieving energy saving of a facility. In the point.

A first characteristic configuration of the present invention is a central type air conditioner that circulates and supplies a heat medium from a heat source facility of a facility to an indoor unit installed in the air conditioning target area in the facility to adjust the temperature of the air conditioning target area, An air conditioning system equipped with an external air conditioner for ventilation that is taken in and introduced into the air conditioning target area.
The central type air conditioner is configured as a cooling only device that performs only cooling of the air conditioning target area,
The external air conditioner is configured as a ventilation heater including an air heating means capable of heating air introduced into the air conditioning target area ,
A heat source that circulates and supplies a heat medium to the air heating means and heats the air introduced into the air-conditioning target area;
Control means for controlling the air conditioning of the air conditioning target area,
The heat source has a smaller capacity than the heat source facility,
When the heating load is present in the air-conditioning target area, the control means does not operate the central type air conditioner, and causes the external air conditioner to supply the heated air heated by the air heating means to the air-conditioning target area. There exists in the point comprised so that the heating operation which blows off may be performed .

  According to the above configuration, since the central type air conditioner is configured as a dedicated cooling device that only cools the air-conditioning target area, it becomes possible to simplify the device configuration in a form that restricts the temperature control function to cooling, Energy saving of facilities can be achieved.

  Nevertheless, the external air conditioner for ventilation is configured as a ventilation heater with air heating means that can heat the air introduced into the air-conditioning target area. It is possible to demonstrate the temperature control function (heating function) opposite to the temperature control function (cooling function) by the air conditioner, and to appropriately air-condition the air-conditioning target area corresponding to both the cooling load and the heating load Can do.

This onset Ming, the outer conditioner includes a ventilation-only operation for introducing outside air only in the air conditioning target area with no heating at the air heating unit, the heated air heated by the air heating unit to the air conditioning target area It is configured to be able to switch to the heating operation that blows out,
In the heating operation, it is preferable that the combined air of the air inside the air-conditioning target area fed through the return air passage and the intake outside air can be heated by the air heating means .

  That is, according to the above configuration, when there is no heating load in the air-conditioning target area, only the outside air is introduced into the air-conditioning target area without being heated by the air heating means by the ventilation exclusive operation by the external air conditioner. In contrast, outside air can be efficiently introduced. When there is a heating load in the air conditioning target area, the air conditioning target area can be heated by blowing the heated air heated by the air heating means to the air conditioning target area by the heating operation by the external air conditioner.

  In addition, since there is a limit to the blowout temperature of the external air conditioner for ventilation (that is, the blowout temperature cannot be extremely high), an appropriate airflow is required to heat the air-conditioning target area with the external air conditioner. become. Therefore, according to the present configuration, in the heating operation by the external air conditioner, the combined air of the air inside the air conditioning target area fed through the return air passage and the intake outside air can be heated by the air heating means. If, for example, the amount of outside air with a large heating load is reduced to the minimum necessary for ventilation, but the amount of blown air is insufficient, the air inside the air-conditioning area with a smaller heating load than the outside air is taken in and merged with the outside air It becomes possible to cover the shortage of air volume, and the air-conditioning target area can be efficiently heated.

The second characteristic configuration of the present invention is configured such that, in the heating operation, the combined air of the air inside the air-conditioning target area fed through the return air passage and the intake outside air can be heated by the air heating means,
The control means performs outside air introduction amount control for adjusting the amount of outside air introduced into the air conditioning target area by the external air conditioner according to the number of people in the air conditioning target area or the carbon dioxide concentration,
In addition, under the execution of the outside air introduction amount control, when the heating operation is performed, if the outside air introduction amount to the air conditioning target area by the external air conditioner alone is insufficient for the set air volume, the shortage The heating air volume control is performed to adjust the amount of air in the area that is taken in through the return air passage and merged with the outside air so that the air is covered by the air in the area to be air-conditioned.
The third aspect of the present invention, the control means is in the time zone of operation early the facility without operating the air conditioner of the central system, configured to execute the heating operation to the outer conditioner It is in the point.

  In other words, even in facilities where there is no heating load in the middle of operation, such as shopping malls and supermarkets where a large number of people serving as heat sources visit, or production factories where many production devices serving as heat sources exist, preparation work by workers Is performed in the early hours of operation when there is not enough heat from the heat source, etc., and the temperature of the air-conditioning target area is too low in the early hours of operation in winter when the temperature is low. There is.

  On the other hand, according to the above configuration, the control unit causes the external air conditioner to perform the heating operation in the initial operation time zone when the heat generation from the heat source is not sufficient. Thus, the temperature of the air-conditioning target area can be raised during the initial operation time zone of the facility. Therefore, the air-conditioning target area can be set to a temperature suitable for the work environment of the worker even during the initial operation period in winter when the temperature is low.

This onset Ming, control means for controlling the air-conditioning of the air conditioning target area is provided,
The control means performs outside air introduction amount control for adjusting the amount of outside air introduced into the air conditioning target area by the external air conditioner according to the number of people in the air conditioning target area or the carbon dioxide concentration,
In addition, under the execution of the outside air introduction amount control, in the heating operation, the area air that is taken in through the return air passage and merged with the outside air so that the amount of air blown out to the air-conditioning target area by the external air conditioner is equal to or larger than the set air volume It is preferable that the heating air flow control for adjusting the amount is executed .

  In other words, with regard to the amount of outside air introduced by the external air conditioner, introducing outside air into the temperature-controlled air-conditioning area increases the air conditioning load, so reducing the amount of outside air introduced to the minimum necessary for ventilation It is preferable in terms of efficiency.

  Therefore, in the present configuration, the control means is configured to execute outside air introduction amount control that adjusts the amount of outside air introduced into the air conditioning target area by the external air conditioner according to the number of persons in the air conditioning target area or the carbon dioxide concentration. Has been. Therefore, by controlling the amount of outside air introduced by this control means, the amount of outside air introduced by the external air conditioner can be reduced to the minimum according to the actual condition of the air conditioning target area, and the air conditioning efficiency can be kept high.

  On the other hand, as mentioned above, the air flow rate by the external air conditioner for ventilation is limited (that is, the air temperature cannot be set to a very high temperature). In order to perform heating, a suitable amount of blown air is required. Therefore, under the execution of the outside air introduction amount control as described above, if the outside air introduction amount is reduced to the minimum according to the actual condition of the air-conditioning target area, the amount of blown air is insufficient in the heating operation by the external air conditioner. There is a possibility that the heating effect by the adjustment becomes insufficient.

  On the other hand, in this configuration, the control means performs the return so that the amount of air blown out to the air-conditioning target area by the external air conditioner is equal to or greater than the set air amount during the heating operation under execution of the outside air introduction amount control. Heating air amount control is performed to adjust the amount of air in the region that is taken in through the air passage and merged with the outside air. Therefore, with this heating air volume control, when the outside air alone is not enough for the blown air volume, the air in the air conditioning target area with a smaller heating load than the outside air can be taken in and merged with the outside air to cover the shortage of the blowing air volume. The area can be heated efficiently.

  That is, according to this configuration, the outside air introduction amount control by the control unit can keep the air conditioning efficiency high in a form in which the outside air introduction amount is reduced to the minimum according to the actual situation of the air conditioning target area, and the heating air amount by the control unit By the control, the heating function by the external air conditioner can be effectively and efficiently exhibited in the form of securing the blown air volume by utilizing the internal air even under the execution of the outside air introduction amount control.

A fourth characteristic configuration of the present invention is a central type air conditioner that circulates and supplies a heat medium from a heat source facility of a facility to an indoor unit installed in the air conditioning target area of the facility to adjust the temperature of the air conditioning target area, and outside air. An air conditioning system for a facility equipped with an external air conditioner for ventilation that is taken in and introduced into the air conditioning target area,
The central air conditioner is configured as a dedicated heating device that only heats the air conditioning target area,
The external air conditioner is configured as a ventilation air conditioner provided with air cooling means capable of cooling the air introduced into the air conditioning target area ,
A heat source that circulates and supplies a heat medium to the air cooling means and cools air introduced into the air-conditioning target area;
Control means for controlling the air conditioning of the air conditioning target area,
The heat source has a smaller capacity than the heat source facility,
When the cooling load is present in the air conditioning target area, the control means does not operate the central air conditioner, and causes the external air conditioner to supply the cooling air cooled by the air cooling means to the air conditioning target area. It exists in the point comprised so that the cooling operation which blows off may be performed .

  In other words, contrary to the first characteristic configuration described above, the central type air conditioner is configured as a heating-only device that only heats the air-conditioning target area, so the device configuration is simplified by limiting the temperature control function to heating. Energy saving of the facility can be achieved.

  Nevertheless, the external air conditioner for ventilation is configured as a ventilation air conditioner equipped with air cooling means that can cool the air introduced into the air-conditioning target area. It is possible to demonstrate the temperature control function (cooling function) opposite to the temperature control function (heating function) by the air conditioner, and to appropriately air-condition the air-conditioning target area corresponding to both the cooling load and the heating load Can do.

Air conditioning system configuration diagram (heating operation) Air conditioning system configuration diagram (ventilation only operation + cooling operation)

  1 and 2 show the overall configuration of an air conditioning system 100 employed in a facility S such as a shopping mall. FIGS. 1 and 2 are similar views showing a schematic configuration of the air conditioning system 100, and a portion through which a fluid flows and a device to be operated are indicated by bold lines. In this embodiment, since the air conditioning system 100 is employed in a facility S having a plurality of floors such as a shopping mall, the air-conditioning target area K is a space of each floor including stores, etc. Only the second floor in the middle of the plurality of floors is schematically shown.

  The air conditioning system 100 includes a central type air conditioner 1 and an external air conditioner 10 as main components. The central type air conditioner 1 adjusts the temperature of the air-conditioning target area K in the facility S, and the external air conditioner 10 introduces the outside air G into the air-conditioning target area K. By exhausting air from the air conditioning target area K by means (not shown), the air conditioning target area K is adjusted to a predetermined temperature and CO2 concentration.

  The central type air conditioner 1 circulates and supplies the heat medium N to the indoor unit 3 from the heat source facility 2 installed on the roof of the facility S, the plurality of indoor units 3 installed in the air conditioning target area K, and the heat source facility 2. A circulation supply means 4 is provided.

  The heat source facility 2 is configured as a cold heat source facility that generates cold heat, and includes, for example, a cooling tower, a chiller, and the like. As the heat medium N (see FIG. 2), various types that can exhibit an endothermic effect on air in the air-conditioning target area K such as cold water, brine, and refrigerant can be employed.

  Although the detailed illustration is omitted, the indoor unit 3 is composed of a fan coil unit in which a fan and a heat exchanger are built in a casing, and the air in the air-conditioning target area K is sucked into the heat exchanger by driving the fan. Then, after cooling by heat exchange with the heat medium N, the air-conditioning target area K is blown out as cold air. Incidentally, the indoor unit 3 can be installed on, for example, a ceiling or a wall surface, and cold air can be blown out from the installation location.

  The circulation supply unit 4 distributes and supplies the heat medium N from the heat source facility 2 to the plurality of indoor units 3, the return path 4b returns the heat medium N from the plurality of indoor units 3 to the heat source facility 2, and the forward path 4a. And a circulation pump (not shown) for allowing the heat medium N to flow through the return path 4b.

  The central air conditioner 1 is configured as a dedicated cooling device that performs only cooling on the air-conditioning target area K. Therefore, as the air conditioner 1, it becomes possible to simplify an apparatus structure in the form which restrict | squeezes a temperature control function to air_conditioning | cooling, and can achieve energy-saving of the facility S.

  The external air conditioner 10 includes a fan 11, and by operating the fan 11, the outside air G is taken in through the outside air intake passage 13, and the taken-in outside air G is introduced into the air conditioning target area K through the outside air introduction passage 14. It is configured. About the outside air introduction location with respect to air-conditioning object area K, outside air can be introduced from a ceiling or a wall surface, for example. The external air conditioner 10 includes a heat exchanger 12 (corresponding to air heating means) capable of heating air introduced into the air-conditioning target area K in addition to the fan 11. A heat source 15 that circulates and supplies a heat medium having warm heat is provided. Incidentally, this heat source 15 is installed in the immediate vicinity of the external air conditioner 10, and a thing with a smaller capacity than the heat source equipment 2 can be applied. In addition, if the heat source 15 includes, for example, a compression refrigeration circuit, the refrigerant in the refrigeration circuit can be used as a heat medium. The heat medium is not limited to the refrigerant, but other heat such as hot water. A medium is also applicable.

  As shown in FIG. 2, the external air conditioner 10 is a ventilation-only operation in which only the outside air G is introduced into the air-conditioning target area K without being heated by the heat exchanger 12, and as shown in FIG. Switching to the heating operation in which heated air is blown out to the air-conditioning target area K is possible. This switching of operation is realized by switching whether or not to circulate and supply a heat medium having heat from the heat source 15 to the heat exchanger 12.

  A return air passage 16 through which the area air A1 in the air conditioning target area K of the facility S flows is connected to a midway part of the outside air intake path 13, and the air A1 in the air conditioning target area K joins the intake outside air G. It is configured to let you. The return air passage 16 is provided with a damper 17 that adjusts the amount of air within the region to be combined with the intake outside air G.

  The air conditioning system 100 includes a control device 20 (corresponding to a control unit) that controls the air conditioning in the air conditioning target area K by controlling the operation of the central air conditioning device 1 and the external air conditioner 10. . In this embodiment, since the facility S is a shopping mall or the like, the operation time zone of the facility S is set based on the opening time and closing time. For example, it is possible to set a time zone from a short time before the opening time to a later time than the closing time as the operation time zone. The control device 20 controls the operation of the central air conditioner 1 and the external air conditioner 10 so as to perform air conditioning in the air conditioning target area K during a set operation time zone on one day (24 hours). .

  As shown in FIGS. 1 and 2, the control device 20 constantly adjusts the amount of outside air introduced into the air-conditioning target area K by the external air conditioner 10 according to the carbon dioxide concentration in the air-conditioning target area K as shown in FIGS. The outside air introduction amount control is performed. Regarding the carbon dioxide concentration in the air conditioning target area K, the carbon dioxide concentration in the air conditioning target area K is measured by installing a carbon dioxide sensor in the air conditioning target area K. In this outside air introduction amount control, the controller 20 reduces the outside air introduction amount to the minimum necessary for ventilation according to the carbon dioxide concentration in the air conditioning target area K, and the higher the carbon dioxide concentration in the air conditioning target area K, The rotational speed of the fan 11 is controlled so as to increase the amount of outside air introduced into the air conditioning target area K. Thus, the control device 20 can appropriately ventilate the air-conditioning target area K by performing the outside air introduction amount control.

  As the outside air introduction amount control, the amount of outside air introduced into the air conditioning target area K by the external air conditioner 10 can be adjusted according to the number of people in the air conditioning target area K instead of the carbon dioxide concentration in the air conditioning target area K. The number of people in the air-conditioning target area K can be measured using a camera or various sensors (not shown) installed at the entrance of the facility S. In this case, the control device 20 reduces the amount of outside air introduced to the minimum necessary for ventilation according to the number of people in the air-conditioning target area K, and as the number of people in the air-conditioning target area K increases, The rotational speed of the fan 11 is controlled so as to increase the amount of outside air introduced.

  In the initial operation time zone of the facility S (for example, the time zone between 1 and 2 hours from the start of operation), the control device 20 does not operate the central air conditioner 1 as shown in FIG. The air conditioner 10 is caused to perform a heating operation in which heated air heated by the heat exchanger 12 is blown out to the air-conditioning target area K. That is, the control device 20 controls the rotation speed of the fan 11 in the external air conditioner 10 and circulates and supplies a heat medium having heat from the heat source 15 to the heat exchanger 12.

  In the heating operation by the external air conditioner 10, the control device 20 switches the damper 17 to the open state, so that the combined air A <b> 2 between the area air A <b> 1 in the air-conditioning target area K and the intake outside air G fed through the return air passage 16. Is heated by the heat exchanger 12 in the external air conditioner 10. Thus, the combined air A <b> 2 heated by the heat exchanger 12 is supplied to the air-conditioning target area K through the outside air introduction path 14 to heat the air-conditioning target area K.

  Here, the return air passage 16 can take in the area air A <b> 1 from the upper part of the air-conditioning target area K such as the top floor of the facility S or the ceiling side of each floor. Thus, by taking in the warm area air A1 from the upper part of the air-conditioning target area K, heating using the area air A1 can be performed, which is advantageous in terms of air conditioning efficiency.

  At the initial stage of the operation time zone, for example, a preparatory work or the like by a worker is performed, and this is a time zone before a large number of people who become heat sources visit. Therefore, by performing the heating as described above, it is possible to ensure a suitable environment as a work environment for workers. And since only the heat source 15 with comparatively small capability is used in order to perform this heating, the request | requirement of heating can be responded appropriately, aiming at the energy-saving of the plant | facility S.

  When heating the air-conditioning target area K in the external air conditioner 10, the heat source 15 having a relatively small capacity is used. For example, the heating temperature cannot be increased to an extremely high temperature only by heating with the heat exchanger 12. There is a limit to the temperature at which the external air conditioner 10 blows out. For that reason, in order to heat the air-conditioning target area K with the external air conditioner 10, a corresponding amount of blown air is required. On the other hand, since the outside air introduction amount control is also performed when heating operation is performed, the outside air introduction amount can be reduced to the minimum necessary for ventilation according to the actual situation of the air conditioning target area K. Then, there is a possibility that the amount of blowing air is insufficient.

  Therefore, in the present embodiment, the control device 20 takes in the outside air through the return air passage 16 so that the amount of air blown to the air-conditioning target area K by the air conditioner 10 is equal to or greater than the set air amount during the heating operation by the air conditioner 10. Heating air volume control for adjusting the amount of air in the region to be joined to G is executed. In this heating air volume control, the control device 20 controls the opening degree of the damper 17 and the rotation speed of the fan 11 so that the air volume blown out to the air-conditioning target area K by the external air conditioner 10 is equal to or greater than the set air volume. That is, if the amount of air blown into the air-conditioning target area K is insufficient with the set air volume with only the outside air introduction amount, the damper is set so that the controller 20 covers the shortage with the air A1 in the air-conditioning target area K. The opening degree of 17 is adjusted to the opening side, and the rotational speed of the fan 11 is also adjusted to the increasing side. As for the set air volume, for example, a constant air volume or a variable air volume can be set in advance based on various conditions such as the blowing temperature by the external air conditioner 10 and the size of the air-conditioning target area K.

  By performing this heating air volume control, when the outside air G alone is insufficient in the blown air volume, the air A1 in the air conditioning target area K can be taken in and merged with the outside air G to cover the shortage of the blowing air volume. Can be properly heated. In addition, it is the air A1 in the air-conditioning target area K that covers the shortage of the blown air volume. The air A1 in the air-conditioning target area K is already air-conditioned by the external air compressor 10 and supplied to the air-conditioning target area K. Because the air is contained, the air conditioning load is smaller than the outside air. Therefore, by covering the shortage of the blown air volume with the air A1 in the air conditioning target area K having a smaller air conditioning load than the outside air G, the air conditioning target area K can be appropriately heated while maintaining high air conditioning efficiency.

  When the initial operation time zone of the facility S elapses, as shown in FIG. 2, the control device 20 switches the external air conditioner 10 from the heating operation to the ventilation-only operation, and causes the central air conditioner 1 to perform the cooling operation. I have to. That is, the control device 20 switches the damper 17 to the closed state, stops circulating supply of the heat medium from the heat source 15 to the heat exchanger 12, and switches the external air conditioner 10 from the heating operation to the ventilation-only operation. In addition, the control device 20 circulates and supplies the heat medium N from the heat source facility 2 to the plurality of indoor units 3, and sucks and cools the air in the air-conditioning target area K by driving the fan in the indoor unit 3. K is blown out as cold air.

  In this way, during the operation time zone of the facility S, there is a request for heating while performing ventilation according to the actual condition of the air-conditioning target area K by the controller 20 basically performing outside air introduction amount control. By performing the heating operation by the external air conditioner 10 in the initial operation time zone, it is possible to perform heating while maintaining high air conditioning efficiency. In addition, after the initial operating time period has elapsed, the control device 20 performs a dedicated ventilation operation by the external air conditioner 10 and a cooling operation by the central air conditioner 1, so that a large number of people who are heat sources can be obtained. Ventilation can also be performed appropriately while properly responding to cooling requirements even when visiting.

[Another embodiment]
(1) In the above embodiment, since the heating operation by the external air conditioner 10 is particularly suitable for the winter season, it can be set so as to be performed only in the winter season in the operation initial time zone of the facility S. That is, in winter, the heating operation by the external air conditioner 10 is performed during the initial operation time period of the facility S, and when the initial operation time period has elapsed, the external air conditioner 10 is switched from the heating operation to the ventilation-only operation. Outside of the winter season such as spring or summer, the external air conditioner 10 is operated exclusively for ventilation from the initial operation time of the facility S.

  Moreover, the operation command part of the manual operation type which instruct | indicates execution of the heating operation by the external air handler 10 is provided, and only when the execution of the heating operation by the external air conditioner 10 is instruct | indicated in the operation instruction part, the external air conditioner 10 It is also possible to perform the heating operation by.

(2) In the above embodiment, in the heating operation by the external air conditioner 10, the heating target of the heat exchanger 12 is the combined air A2 of the internal air A1 and the intake outside air G. However, the heating object of the heat exchanger 12 is the input outside air. It is also possible to use G as the G, and to bring the internal air A1 into the outside air G heated by the heat exchanger 12 and supply it to the air-conditioning target area K as the combined air A2. On the contrary, the heating object of the heat exchanger 12 is set as the area air A1, and the outside air G is taken into the area air A1 heated by the heat exchanger 12, and is supplied to the air conditioning object area K as the combined air A2. it can.

(3) In the above embodiment, the central type air conditioner 1 is configured as a dedicated cooling device, and the external air conditioner 10 is configured as a ventilation heater. Conversely, the central type air conditioner 1 is configured as a dedicated heating device. The external air conditioner 10 can be configured as a ventilation air conditioner. In this case, the heat source facility 2 circulates and supplies a heat medium having hot heat to the indoor unit 3, and the heat source 15 circulates and supplies a heat medium having cold heat to the heat exchanger 12.

  In this case, contrary to the above-described embodiment, during the cooling operation by the external air conditioner 10 under the execution of the external air introduction amount control, the amount of air blown out to the air-conditioning target area by the external air conditioner 10 is equal to or greater than the set air volume. In addition, cooling air volume control is performed to adjust the amount of air in the region that is taken in through the return air passage and merged with the outside air.

  The present invention relates to a central type air conditioner that circulates and supplies a heat medium from a heat source facility of a facility to an indoor unit installed in the air conditioning target area in the facility to adjust the temperature of the air conditioning target area, and an air conditioning target area by taking in outside air It can be applied to various air conditioning systems equipped with an external air conditioner for ventilation.

DESCRIPTION OF SYMBOLS 1 Central type air conditioner 2 Heat source equipment 3 Indoor unit 10 External air conditioner 20 Control apparatus (control means)
100 Air-conditioning system A1 Area air A2 Combined air G Outside air K Air-conditioning area S Facility

Claims (4)

Central type air conditioner that circulates and supplies the heat medium from the heat source equipment of the facility to indoor units installed in the air-conditioning area of the facility to adjust the temperature of the air-conditioning area, and ventilation that takes outside air into the air-conditioning area An air conditioning system equipped with an external air conditioner for
The central type air conditioner is configured as a cooling only device that performs only cooling of the air conditioning target area,
The external air conditioner is configured as a ventilation heater including an air heating means capable of heating air introduced into the air conditioning target area ,
A heat source that circulates and supplies a heat medium to the air heating means and heats the air introduced into the air-conditioning target area;
Control means for controlling the air conditioning of the air conditioning target area,
The heat source has a smaller capacity than the heat source facility,
When the heating load is present in the air-conditioning target area, the control means does not operate the central type air conditioner, and causes the external air conditioner to supply the heated air heated by the air heating means to the air-conditioning target area. An air conditioning system that is configured to execute a heating operation that blows out . Prior Symbol heating operation, is configured to merge air between regional air and the incorporation of outside air conditioning target area to be fed through the return air path to be heated by the air heating means,
The control means performs outside air introduction amount control for adjusting the amount of outside air introduced into the air conditioning target area by the external air conditioner according to the number of people in the air conditioning target area or the carbon dioxide concentration,
In addition, under the execution of the outside air introduction amount control, when the heating operation is performed, if the outside air introduction amount to the air conditioning target area by the external air conditioner alone is insufficient for the set air volume, the shortage 2. The air conditioning system according to claim 1, wherein the air conditioning system is configured to execute a heating air amount control that adjusts an amount of air in the region that is taken in through the return air passage and merges with the outside air so that the air is covered by the air in the region to be air- conditioned. . Before SL control means, wherein in the time period of operation early facility, the central without operating the air conditioner of type, the outer conditioner the heating operation claim is configured to perform one or two The air conditioning system described. Central type air conditioner that circulates and supplies the heat medium from the heat source equipment of the facility to indoor units installed in the air-conditioning area of the facility to adjust the temperature of the air-conditioning area, and ventilation that takes outside air into the air-conditioning area An air conditioning system for a facility equipped with an external air conditioner,
The central air conditioner is configured as a dedicated heating device that only heats the air conditioning target area,
The external air conditioner is configured as a ventilation air conditioner provided with air cooling means capable of cooling the air introduced into the air conditioning target area ,
A heat source that circulates and supplies a heat medium to the air cooling means and cools air introduced into the air-conditioning target area;
Control means for controlling the air conditioning of the air conditioning target area,
The heat source has a smaller capacity than the heat source facility,
When the cooling load is present in the air conditioning target area, the control means does not operate the central air conditioner, and causes the external air conditioner to supply the cooling air cooled by the air cooling means to the air conditioning target area. An air conditioning system configured to execute a cooling operation to blow out .

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