The present invention relates to an air conditioning system and an air conditioning server to control indoor air conditioning. Background Art
[0002] In a conventional air conditioning system to control air conditioning in a closed system space represented by an inside of a building including a heat source such as a heat generating apparatus, a method of employing cooling just by air conditioning, employing forced exhaust of heat generated by the heating generating apparatus, or employing a combination of the air conditioning and the exhaust has been used. Generally, power consumption can be reduced more by the exhaust of the heat to outside a closed system using an exhaust fan than by execution of air conditioning control just by the air conditioning as a countermeasure against a temperature rise in the closed system due to the generated heat. Therefore, Patent Document 1, for example, describes a configuration in which a temperature state of a heat source is detected and exhaust is operated by a detection value input to a server. In such a conventional air conditioning system to control air conditioning in the closed system space including the heat source using exhaust and air conditioning facilities, a method is adopted where, by constantly operating an exhaust fan or controlling operation and stop of the exhausting fan by detection of an operation status or a temperature of the heat source, an energy saving effect is obtained. Citation List Patent Literature

[0003] Patent Literature 1: JP 2004-053175 A Summary of Invention Technical Problem
[0004] In the conventional air conditioning system, there is a problem that, though removal of the generated heat is enabled by the exhaust, cold air supplied by the air conditioning is excessively exhausted when the exhaust is performed, so that an energy loss occurs. A lot of electric power is necessary for performing air supply by the air conditioning, and to throw away the cold air to be utilized for the air conditioning to the outside of the closed system becomes the energy loss. Accordingly, it has been a challenge to exhaust only unnecessary heat without exhausting the cold air.
There may also be a case where a quantity of heat that is generated by the heat source in the building is not constant. In a production facility such as a furnace, a quantity of heat that is generated changes every moment due to a production load. When operation is started, the quantity of the heat that is generated is small. However, heat generation continues for a while after the operation is stopped. In such an environment, there is a problem that air conditioning control for operation using both of exhaust and air supply becomes complex and it becomes difficult to grasp a state where exhaust of cold air is too weak or a state where the exhaust of the cold air is excessive.
When the exhaust is performed, supply of outdoor air is simultaneously performed. In the conventional air conditioning system, however, influence of an outdoor air temperature that will change according to the season or the time is not taken into consideration. Accordingly, it is a challenge to improve exhaust and air supply control in consideration of the influence of the outdoor air temperature.
In an environment such as a factory where a change in a facility layout occurs, it is a challenge to obtain an air conditioning system in which a change in an exhaust

facility is easy.
[0005] The present invention has been made in order to solve the problems as
mentioned above. It is an object of the present invention to obtain an air conditioning
system in which a state of excessive exhaust of cold air supplied by air conditioning can
be avoided and by which an energy saving effect higher than that with a conventional
technology can be obtained.
Solution to Problem
[0006] An air conditioning system according to the present invention may include:
a cold air supply system apparatus to supply, from outside to inside a building, air colder than air of the inside of the building;
an exhaust system apparatus to exhaust the air of the inside of the building to the outside;
a data collection apparatus to detect outside and inside temperatures of the building and collect the detected outside and inside temperatures; and
an air conditioning control server to control whether to operate both of the cold air supply system apparatus and the exhaust system apparatus, to operate only one of the cold air supply system apparatus and the exhaust system apparatus, or to stop the both of the cold air supply system apparatus and the exhaust system apparatus, based on the outside and inside temperatures collected by the data collection apparatus. Advantageous Effects of Invention
[0007] According to the air conditioning system of the present invention, a state of excessive exhaust of the cold air supplied by the cold air supply system apparatus can be avoided, and an energy saving effect higher than that with a conventional technology can be thereby obtained. Brief Description of Drawings

[0008] Fig. 1 is a system configuration diagram of an exhaust and air supply coordinated air conditioning system 100 according to a first embodiment.
Fig. 2 is a configuration diagram of an exhaust and air supply apparatus 200 according to the first embodiment.
Fig. 3 is a hardware configuration diagram of an air conditioning control server 400 according to the first embodiment.
Fig. 4 illustrates an example where the exhaust and air supply coordinated air conditioning system 100 according to the first embodiment is applied in a factory.
Fig. 5 is a flowchart illustrating operations of the exhaust and air supply coordinated air conditioning system 100 according to the first embodiment.
Fig. 6 illustrates an initial setting example of threshold values of an exhaust system apparatus 220 and a cold air supply system apparatus 210 according to the first embodiment.
Fig. 7 illustrates an initial setting example of threshold values of an exhaust system apparatus 220 and a cold air supply system apparatus 210 according to a second embodiment.
Fig. 8 illustrates a relationship between power consumption of a cold air supply system apparatus 210 and exhaust strength of an exhaust system apparatus 220 and a relationship between power consumption and an exhaust amount of the exhaust system apparatus 220, according to a third embodiment.
Fig. 9 is a system configuration diagram of an exhaust and air supply coordinated air conditioning system 100 according to the third embodiment.
Fig. 10 is a configuration diagram with respect to a power monitor I/F 201 according to the third embodiment. Description of Embodiments

[0009] First Embodiment
An air conditioning system according to a first embodiment of the present invention will be described.
[0010] Fig. 1 is a system configuration diagram of an exhaust and air supply coordinated air conditioning system 100 being the air conditioning system of the present invention. The exhaust and air supply coordinated air conditioning system 100 used in a space of a closed system such as a building includes an exhaust and air supply apparatus 200, a data collection apparatus 300, and an air conditioning control server 400. A common temperature monitor 310 is easy to install and is for converting a temperature into an electrical signal and transmitting data to the air conditioning control server 400. The temperature monitor 310 that is a detector to detect a temperature is classified into a heat source temperature monitor 311, an outdoor air temperature monitor 312, and a closed system temperature monitor 313, which will be described later. The air conditioning control server 400 includes an air supply and exhaust control apparatus 410 and a database 420.
[0011] Fig. 2 illustrates a configuration of the exhaust and air supply apparatus 200. The exhaust and air supply apparatus 200 includes an exhaust and air supply control I/F 202 that is an interface (hereinafter abbreviated as an I/F) connected to each of the data collection apparatus 300 and the air conditioning control server 400. The exhaust and air supply control I/F 202 is an I/F to mediate between the air conditioning control server 400 and each of a cold air supply system apparatus 210, an exhaust system apparatus 220, and an outdoor air supply system apparatus 230 and to be used for controlling the cold air supply system apparatus 210, the exhaust system apparatus 220, and the outdoor air supply system apparatus 230. The cold air supply system apparatus 210 supplies cold air, includes a function corresponding to a common cooling

apparatus, and can be controlled from the air conditioning control server 400 using the exhaust and air supply control I/F 202. The exhaust system apparatus 220 includes an exhaust fan 221 and an exhaust valve driving device 222 whose operations can be respectively controlled from an outside, and exhausts heat by driving the exhaust fan 221 and opening and closing of a common exhaust valve installed at a boundary between the closed system space and outdoor air. It may also be so arranged that the exhaust valve driving device 222 is omitted when the exhaust valve can be driven by the exhaust fan 221. The outdoor air supply system apparatus 230 is an apparatus to supply the outdoor air corresponding to a volume to be exhausted by the exhaust system apparatus 220 by opening and closing of an air supply valve driving device 231 that is installed at the boundary between the closed system space and the outdoor air, like the exhaust system apparatus 220. When an outdoor air temperature is high, mixing in of the outdoor air can also be avoided by controlling the exhaust valve driving device 222 and the air supply valve driving device 231. It is assumed that the outdoor air supply system apparatus 230 operates along with an operation of the exhaust system apparatus 220.
[0012] Fig. 3 illustrates a hardware configuration of the air conditioning control server 400, and the air conditioning control server 400 includes the air supply and exhaust control apparatus 410 and the database 420. The air supply and exhaust control apparatus 410 includes a processor 401, a memory 402, a control I/F 403, a sensor I/F 404, an input I/F 405, and a display unit I/F 406. The processor 401 is a central processing unit (CPU), for example.
[0013] The processor 401 is connected to the other hardware devices via a bus or the like, and controls those hardware devices. The processor 401 reads a program 421 from the database 420 and executes the program 421 unfolded in the memory 402.

The control I/F 403 is an I/F for controlling the cold air supply system apparatus 210, the exhaust system apparatus 220, and the outdoor air supply system apparatus 230 via the exhaust and air supply control I/F 202. The sensor I/F 404 is an I/F for collecting data in the data collection apparatus 300. The input I/F 405 is an IF of an input device such as a keyboard or a mouse. The display unit I/F 406 is an I/F for a display device such as a display. The database 420 is a device to store data necessary for the control and set values for the control, as a file 422.
[0014] Fig. 4 illustrates an example where the exhaust and air supply coordinated air conditioning system 100 according to the present invention is applied in the environment of a factory. The factory includes a building 501 and a control room 502 where the air conditioning control server 400 is installed. The building 501 and the control room 502 may be present at the same location. Each cold air supply system apparatus 210 cools an inside of the building 501. Each exhaust system apparatus 220 exhausts high-temperature air using an exhaust hood installed immediately above a manufacturing apparatus 503. Herein, the manufacturing apparatus 503 is an apparatus not installed for a purpose of warming the building 501 but installed for a manufacturing purpose, and generates heat when operated. If the manufacturing apparatus 503 emits the heat from a side surface thereof or the like, a cover to cover the manufacturing apparatus 503 may be installed. The outdoor air system air supply apparatus 230 takes in outdoor air corresponding to a volume to be exhausted by the exhaust system apparatus 220 into the building 501. The temperature monitor 310 is classified into the heat source temperature monitor 311, the outdoor air temperature monitor 312, and the closed system temperature monitor 313. Each heat source temperature monitor 311 is installed in the vicinity of an apparatus to be monitored, e.g., at an arbitrary location between an exhaust hood installed immediately above a heat

source and the heat source. The outdoor air temperature monitor 312 is installed at a location in contact with the outdoor air in the vicinity of the outdoor air supply system apparatus 230, for example, and monitors an outside temperature of the building 501. The closed system temperature monitor 313 is installed in the vicinity of a location where a worker in the building 501 is present, and monitors an inside temperature of the building 501. The air conditioning control server 400 is for controlling the exhaust and air supply apparatuses for air conditioning such that the high temperature air is exhausted and cold air is not exhausted, based on data that have been collected. [0015] Subsequently, operations of the exhaust and air supply coordinated air conditioning system 100 will be described. Fig. 5 illustrates a flowchart indicating the operations of the exhaust and air supply coordinated air conditioning system 100. These operations are performed in the air conditioning control server 400 using temperature data collected by the data collection apparatus 300 and are executed by the cold air supply system apparatus 210, the exhaust system apparatus 220, and the outdoor air supply system apparatus 230 via the exhaust and air supply control I/F 202. First, a manager inputs an initial temperature setting to the air conditioning control server 400 (SI01). In the case of a factory where a worker is present, for example, the manager inputs a value such as 25 degrees. A method of computing threshold values in accordance with the initial setting is set in advance, and the air conditioning control server 400 uses this initial temperature set value in order to compute the threshold values. The threshold values to be used for the exhaust and air supply coordinated air conditioning system 100 are a threshold value for operating the exhaust system apparatus 220, a threshold value for stopping the exhaust system apparatus 220, a threshold value for operating the cold air supply system apparatus 210, and a threshold value for stopping the cold air supply system apparatus 210. The air conditioning

control server 400 thus automatically sets each threshold value, based on the threshold value computation method and using the initial temperature set value (S200). Then, the set value in S101 and an outdoor air temperature are compared, based on information on the outdoor air temperature collected by the temperature monitor 310 (S102). If the outdoor air temperature is higher than the set value in S101, the cold air supply system apparatus 210 is operated (SI 03). If the outdoor air temperature is lower than the set value in S101, it is determined whether or not a closed system temperature is lower than the set value in S101 (S250). If the closed system temperature is lower than the set value in S101, a stop state of the exhaust and air supply apparatus 200 is maintained (S251). If the closed system temperature is too low for the worker, heating may be introduced. If the closed system temperature is higher than the set value in S101 (S250), the exhaust system apparatus 220 is operated (S300). In this case, the outdoor air supply system apparatus 230 also operates along with the exhaust system apparatus 220. That is, cooling using cold outdoor air is enabled. If the temperature of the heat source detected by using the heat source temperature monitor 311 is lower than the operation threshold value of the cold air supply system apparatus 210 (S301), the operation of the exhaust system apparatus 220 is continued (S303). If the temperature of the heat source detected by using the heat source temperature monitor 311 is higher than the operation threshold value of the cold air supply system apparatus 210 (S301), the cold air supply system apparatus 210 is operated (S302). Subsequently, if the temperature of the heat source detected by using the heat source temperature monitor 311 is higher than the stop threshold value of the cold air supply system apparatus 210 (S304), the operation of the cold air supply system apparatus 210 is maintained (S306). If the temperature of the heat source is lower than the stop threshold value (S304), cold air is excessively exhausted. Thus, the cold air

supply system apparatus 210 is stopped (S305). Thereafter, the procedure returns to the determination in SI02.
[0016] If the outdoor air temperature is higher than the set value in S101 based on the information on the outdoor air temperature collected by the temperature monitor 310 (SI02), the cold air supply system apparatus 210 is operated (SI03). Further, the heat source temperature monitor 311 compares the temperature in the vicinity of the heat source that has been collected and the operation threshold value (S104). If the temperature in the vicinity of the heat source that has been collected is lower than the operation threshold value, the exhaust system apparatus 220 is maintained in the stop state (S106). If the temperature in the vicinity of the heat source that has been collected is higher than the operation threshold value, the exhaust system apparatus 220 is operated (SI 05). If monitoring of the temperature of the heat source is continued and the state where the temperature of the heat source is higher than the stop threshold value of the exhaust system apparatus 220 is continued (SI 07), the operation of the exhaust system apparatus 220 is maintained (SI 09). If the state where the temperature of the heat source is lower than the stop threshold value of the exhaust system apparatus 220 is continued, a state of exhausting even cold air has been brought about. Thus, the exhaust system apparatus 220 is stopped (SI08). Thereafter, the procedure returns to S102 and the determination is then repeated.
[0017] Under this control, execution of operations of both of the cold air supply system apparatus 210 and the exhaust system apparatus 220 is limited to a case where the outdoor air temperature is higher than the set value in S101 (SI02) and the temperature in the vicinity of the heat source that has been collected is higher than the operation threshold value (SI05), or a case where the outdoor air temperature is lower than the set value in S101 (SI02), the closed system temperature is higher than the set

value in S101 (S250), and the temperature of the heat source detected by using the heat source temperature monitor 311 is higher than the operation threshold value of the cold air supply system apparatus 210 (S301). That is, if the outdoor air temperature monitored by the outdoor air temperature monitor 312 is higher than the set value in S101 (SI 02) and the temperature in the vicinity of the heat source monitored by the heat source temperature monitor 311 is lower than the operation threshold value (S106), the exhaust system apparatus 220 does not operate, and only the cold air supply system apparatus 210 operates. As a result, a state where cold air from the cold air supply system apparatus 210 is exhausted by the exhaust system apparatus 220 without alteration can be avoided.
As mentioned above, the outside temperature of the building 501 and the temperature of the heat source in the building 501 are monitored, and based on the temperatures collected by the data collection apparatus 300 to collect the monitored temperatures, the air conditioning control server 400 performs coordinated control over the operations and the stops of the cold air supply system apparatus 210 and the exhaust system apparatus 220. The state where the cold air from the cold air supply system apparatus 210 is exhausted by the exhaust system apparatus 220 without alteration can be thereby avoided.
[0018] Fig. 6 illustrates an initial setting example of the operation threshold value and the stop threshold value of the exhaust system apparatus 220 and the operation threshold value and the stop threshold value of the cold air supply system apparatus 210. The initial threshold value setting (S200) will be described, using an example of the initial setting. If the outdoor air temperature is higher than the set value in S101 (YES in SI 02), or if the outdoor air temperature is 30 degrees and the input value in SI 02 is 25 degrees in summer, for example, the cold air supply system apparatus 210 is brought

into an operation state. The exhaust system apparatus 220 operates if the temperature of the heat source exceeds 26 degrees and stops if the temperature of the heat source is below 24 degrees. If the outdoor air temperature is higher than the set value in S101 (NO in SI 02), or if the outdoor air temperature is 10 degrees, the input value in SI 02 is 25 degrees, and the closed system temperature is 30 degrees in winter, for example, the exhaust system apparatus 220 is in an operation state according to S300. Then, if the temperature of the heat source is higher than the operation threshold value of 26 degrees of the cold air supply system apparatus 210 in S301, the cold air supply system apparatus 210 is operated (S302). If the temperature of the heat source has fallen below 24 degrees, the cold air supply system apparatus 210 is stopped. Though each operation threshold value and each stop threshold value are herein set to the set temperature in S101 + 1 and the set temperature in S101 - 1, respectively, it is assumed that + 1 and - 1 can be arbitrarily set and are optimized by the manager of air conditioning.
[0019] As mentioned above, in the first embodiment, the air conditioning control server 400 performs control using sensor information and the threshold values. The coordinated control over the operations and stops of the cold air supply system apparatus 210 and the exhaust system apparatus 220 can be thereby performed. As a result, the state where the cold air from the cold air supply system apparatus 210 is exhausted by the exhaust system apparatus 220 without alteration can be reduced, and excessive exhaust of the cold air is avoided. A high energy saving effect can be thereby obtained.
[0020] In the first embodiment, air conditioning control is constantly carried out by the air conditioning control server 400. Thus, even when a change in the facility of the exhaust and air supply apparatus 200 has occurred, the server of the air conditioning

system does not need to be changed. An air conditioning system capable of readily changing an exhaust facility can be obtained in an environment such as a factory where a change in a facility layout occurs.
[0021] As has been described so far, the exhaust and air supply coordinated air conditioning system 100 being the air conditioning system described in the first embodiment is characterized to include the cold air supply system apparatus 201 to supply air colder than air of the inside of the building 501 from an outside of the building 501 to the inside of the building 501, the exhaust system apparatus 220 to exhaust the air of the inside of the building 501 to the outside, the data collection apparatus 300 to monitor an outside temperature of the building 501 and a temperature of the heat source in the building and collect the outside temperature and the temperature of the heat source that have been monitored, and the air conditioning control server 400 to control whether to operate both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, to operate only one of the cold air supply system apparatus 210 and the exhaust system apparatus 220, or to stop the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, based on the outside temperature and the temperature of the heat source that have been collected by the data collection apparatus. With this arrangement, a state of excessive exhaust of the cold air from the cold air supply system apparatus 210 by the exhaust system apparatus 220 can be avoided. A higher energy saving effect than with the conventional technology can be obtained by the air conditioning system described in this embodiment. Further, air conditioning control for operation using both of exhaust and air supply can be appropriately performed, thereby preventing a state where exhaust of cold air is too weak or the state where the exhaust of the cold air is excessive. In addition, improvement in exhaust and air supply control in consideration of influence of

an outdoor air temperature is enabled.
[0022] In the air conditioning system described in the first embodiment, the data collection apparatus 300 is characterized to monitor an inside temperature of the building 501 and collect the inside temperature of the building that has been monitored. The air conditioning control server 400 is characterized to control whether to operate the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, to operate the only one of the cold air supply system apparatus 210 and the exhaust system apparatus 220, or to stop the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, using the inside temperature collected by the data collection apparatus 300. With this arrangement, the exhaust system apparatus 220 can be operated when necessary, according to the inside temperature of the building 501, so that the energy saving effect of the air conditioning system described in this embodiment can be further enhanced.
[0023] In the air conditioning system described in the first embodiment, the air conditioning control server 400 is characterized to set the threshold values for determining the operations and the stops of the cold air supply system apparatus 210 and the exhaust system apparatus 220 and control whether to operate the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, to operate the only one of the cold air supply system apparatus 210 and the exhaust system apparatus 220, or to stop the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, based on these threshold values. It is also characterized in that if the outside temperature collected by the data collection apparatus 300 is higher than a threshold value set in advance, the cold air supply system apparatus 210 is operated, and that if the inside temperature collected by the data collection apparatus 300 meets the criterion set in advance, the exhaust system apparatus 220 is operated.

With this arrangement, by setting appropriate threshold values, the energy saving effect of the air conditioning system described in this embodiment can be enhanced. [0024] The air conditioning control server 400 described in the first embodiment is characterized to control whether to operate the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, to operate the only one of the cold air supply system apparatus 210 and the exhaust system apparatus 220, or to stop the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, based on the outside and inside temperatures of the building 501 detected by the temperature monitor 310 being a temperature detector. The cold air supply system apparatus 210 supplies the air colder than the air of the inside 501 from the outside of the building 501 to the inside of the building 501. The exhaust system apparatus 220 exhausts the air of the inside of the building 501 to the outside. With this arrangement, the state of excessive exhaust of the cold air from the cold air supply system apparatus 210 by the exhaust system apparatus 220 can be avoided, and a higher energy saving effect than with the conventional technology can be thereby obtained. [0025] Second Embodiment
While the operation of the exhaust system apparatus 220 is set to have two states of operation and stop in the first embodiment, an exhaust system apparatus 220 capable of varying exhaust strength is provided in this embodiment. This embodiment will be described.
[0026] The exhaust strength may be the one by which level settings of an exhaust fan 221 such as strong, medium, weak, and stop can be made, or the one in which the strength can be linearly changed. Fig. 7 illustrates a setting example of threshold values when strength of each of the exhaust system apparatus 220 and the cold air supply system apparatus 210 can be set in four stages of strong, medium, weak, and

stop. In this case, with respect to the operations in Fig. 5, the strength for each operation changes according to the determination with respect to a temperature that is monitored and a threshold value. However, there is no change in the flowchart. According to a second embodiment, control with a smaller temperature variation or control with high comfortability and a high energy saving effect can be executed, and weak driving with a higher energy saving effect can be performed when the exhaust fine is an inverter device.
[0027] As mentioned above, the second embodiment is characterized in that the air conditioning control server 40 sets a plurality of strength threshold values and based on this plurality of strength threshold values, the air control server 40 controls driving strength of each of the cold air supply system apparatus 210 and the exhaust system apparatus 220 in operation. The plurality of strength threshold values each indicate a strength threshold value for driving to determine the driving strength of each of the cold air supply system apparatus 210 and the exhaust system apparatus 220 in operation. With this arrangement, the control with the smaller temperature variation or the control with the high comfortability and the high energy saving effect can be executed, and the weak driving with the higher energy effect can be performed when the exhaust fine is the inverter device. [0028] Third Embodiment
The strength of the exhaust system apparatus 220 is set to be variable in the second embodiment. In this embodiment, a description will be given about an embodiment where an air conditioning control server 400 learns which exhaust strength will provide a highest energy saving effect and the air conditioning control server 400 automatically sets each threshold value. [0029] Fig. 8 illustrates a relationship (indicated by a solid line) between power

consumption of a cold air supply system apparatus 210 and exhaust strength of an exhaust system apparatus 220 and a relationship (indicated by a broken line) between power consumption and an exhaust amount of the exhaust system apparatus 220 when an outdoor air temperature is high, as in summer. The power consumption of the cold air supply system apparatus 210 is minimized at exhaust strength B. Total power consumption of the exhaust and air supply apparatus 200 is, however, determined by the sum of power consumption (Wa) of the cold air supply system apparatus 210 and power consumption (Wv) of the exhaust system apparatus 220. Thus, exhaust strength A that minimizes the sum of the Wa and the Wv is optimal. In a third embodiment, a power monitor illustrated in Fig. 9 and a power monitor I/F 201 illustrated in Fig. 10 are included. The power monitor is a common power monitor device and is installed on an apparatus to be monitored or a switchboard to supply power to the apparatus to be monitored, thereby collecting a power amount. An object of the power monitor I/F 201 is to mediate between the apparatus to be monitored and the power monitor to collect data of the power consumption amount of the apparatus to be monitored. The power monitor I/F 201 may be installed on the apparatus to be monitored or a device similar to the switchboard to supply the power to the apparatus to be monitored. According to the third embodiment, the air conditioning control server 400 automatically sets each threshold value that minimizes the sum of power amounts of the respective apparatuses. A high energy saving effect can be thereby obtained. [0030] As mentioned above, an air conditioning system described in the third embodiment is characterized in that a data collection apparatus 300 monitors power consumptions of the cold air supply system apparatus 210 and the exhaust system apparatus 220 and also collects the power consumptions thus monitored, and the air conditioning control server 400 controls whether to operate both of the cold air supply

system apparatus 210 and the exhaust system apparatus 220, to operate only one of the cold air supply system apparatus 210 and the exhaust system apparatus 220, or to stop the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, based on the power consumptions collected by the data collection apparatus 300. With this arrangement, an operation environment that reduces power consumption can be set, and an air conditioning system with a high power saving effect can be thereby implemented.
[0031] The air conditioning system described in the third embodiment is characterized in that the data collection apparatus 300 monitors the power consumptions of the cold air supply system apparatus 210 and the exhaust system apparatus 220 and also collects the power consumptions thus monitored, and the air conditioning control server 400 sets the threshold values so that the total power consumption of the cold air supply system apparatus 210 and the exhaust system apparatus 220 becomes low, based on the power consumptions collected by the data collection apparatus 300. With this arrangement, the threshold values that reduce the total power consumption can be set, and an air conditioning system with a high power saving effect can be thereby implemented. [0032] Fourth Embodiment
In the first, second, and third embodiments, the threshold values of the exhaust system apparatus 220 are set using the temperature of the heat source temperature monitor 311. However, when priority is given to the environment of a worker in a factory, for example, a closed system temperature monitor 313 that is installed in the vicinity of the worker in a closed system is used. In a fourth embodiment, ensuring of comfortability in the temperature environment of the worker and an energy saving operation of an exhaust and air supply apparatus 200 can be both

achieved.
[0033] Accordingly, an exhaust and air supply coordinated air conditioning system 100 described in the fourth embodiment is characterized to include a cold air supply system apparatus 210 to supply, from outside to inside a building 501, air colder than air of the inside of the building 501, an exhaust system apparatus 220 to exhaust the air of the inside of the building 501 to the outside, a data collection apparatus 300 to monitor outside and inside temperatures of the building 501 and collect the monitored outside and inside temperatures, and an air conditioning control server 400 to control whether to operate both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, to operate only one of the cold air supply system apparatus 210 and the exhaust system apparatus 220, or to stop the both of the cold air supply system apparatus 210 and the exhaust system apparatus 220, based on the outside and inside temperatures collected by the data collection apparatus 300. With this arrangement, a state of excessive exhaust of the cold air from the cold air supply system apparatus 210 by the exhaust system apparatus 220 can be avoided, and a higher energy saving effect than with the conventional technology can be thereby obtained. The inside temperature is determined by a heat source in the building 501 as well. Thus, "the inside temperature of the building 501" includes, in addition to a temperature monitored by the closed system temperature monitor 313, the temperature of the heat source in the building 501. Reference Signs List
[0034] 100: exhaust and air supply coordinated air conditioning system; 200: exhaust and air supply apparatus; 202: exhaust and air supply control I/F; 210: cold air supply system apparatus; 220: exhaust system apparatus; 221: exhaust fan; 222: exhaust valve driving device; 230: outdoor air supply system apparatus; 231: air supply valve driving

device; 300: data collection apparatus; 310: temperature monitor; 311: heat source temperature monitor; 312: outdoor air temperature monitor; 313: closed system temperature monitor; 320: power monitor; 400: air conditioning control server; 401: processor; 402: memory; 403: control I/F; 404: sensor I/F; 405: input I/F; 406: display unit I/F; 410: air supply and exhaust control apparatus; 420: database; 421: program; 422: file; 501: building; 502: control room; 503: manufacturing apparatus

Claims [Claim 1] An air conditioning system comprising:
a cold air supply system apparatus to supply, from outside to inside a building, air colder than air of the inside of the building;
an exhaust system apparatus to exhaust the air of the inside of the building to the outside;
a data collection apparatus to detect outside and inside temperatures of the building and collect the detected outside and inside temperatures; and
an air conditioning control server to control whether to operate both of the cold air supply system apparatus and the exhaust system apparatus, to operate only one of the cold air supply system apparatus and the exhaust system apparatus, or to stop the both of the cold air supply system apparatus and the exhaust system apparatus, based on the outside and inside temperatures collected by the data collection apparatus. [Claim 2] The air conditioning system according to claim 1,
wherein the data collection apparatus detects a temperature of a heat source in the building and collects the detected temperature of the heat source, and
wherein the air conditioning control server controls whether to operate the both of the cold air supply apparatus and the exhaust system apparatus, to operate the only one of the cold air supply apparatus and the exhaust system apparatus, or to stop the both of the cold air supply apparatus and the exhaust system apparatus, using the temperature of the heat source collected by the data collection apparatus. [Claim 3] The air conditioning system according to claim 1 or 2,
wherein the air conditioning control server sets threshold values for determining operations and stops of the cold air supply apparatus and the exhaust system apparatus, and controls whether to operate the both of the cold air supply

apparatus and the exhaust system apparatus, to operate the only one of the cold air supply apparatus and the exhaust system apparatus, or to stop the both of the cold air supply apparatus and the exhaust system apparatus, based on the threshold values. [Claim 4] The air conditioning system according to claim 3,
wherein the air conditioning control server sets a plurality of strength threshold values each for determining driving strength of each of the cold air supply apparatus and the exhaust system apparatus in operation, and based on the plurality of strength threshold values, the air conditioning control server controls the driving strength of each of the cold air supply apparatus and the exhaust system apparatus in operation. [Claim 5] The air conditioning system according to any one of claims 1 to 4,
wherein the data collection apparatus detects power consumptions of the cold air supply apparatus and the exhaust system apparatus and collects the detected power consumptions, and
wherein the air conditioning control server controls whether to operate the both of the cold air supply apparatus and the exhaust system apparatus, to operate the only one of the cold air supply apparatus and the exhaust system apparatus, or to stop the both of the cold air supply apparatus and the exhaust system apparatus, based on the power consumptions collected by the data collection apparatus. [Claim 6] The air conditioning system according to claim 3,
wherein the data collection apparatus detects power consumptions of the cold air supply apparatus and the exhaust system apparatus and collects the detected power consumptions, and
wherein the air conditioning control server sets the threshold values so that total power consumption of the cold air supply apparatus and the exhaust system

apparatus becomes low, based on the power consumptions collected by the data
collection apparatus.
[Claim 7] An air conditioning system comprising:
a cold air supply system apparatus to supply, from outside to inside a building, air colder than air of an inside of the building;
an exhaust system apparatus to exhaust the air of the inside of the building to the outside; and
a data collection apparatus to detect outside and inside temperatures of the building and collect the detected outside and inside temperatures,
wherein when the outside temperature collected by the data collection apparatus is higher than a threshold value set in advance, the cold air supply system apparatus is operated, and when the inside temperature collected by the data collection apparatus meets a criterion set in advance, the exhaust system apparatus is operated. [Claim 8] An air conditioning control server to control whether to operate both of a cold air supply system apparatus and an exhaust system apparatus, to operate only one of the cold air supply system apparatus and the exhaust system apparatus, or to stop the both of the cold air supply system apparatus and the exhaust system apparatus, based on outside and inside temperatures of a building detected by a temperature detector, the cold air supply system supplying, from outside to inside the building, air colder than air of the inside of the building, the exhaust system apparatus exhausting the air of the inside of the building to the outside.