JP6347982B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system.

  2. Description of the Related Art Conventionally, an air conditioning system that performs air conditioning on an air conditioning target room generally includes a heat exchanging unit that cools and heats air and an air blowing unit that blows air cooled or heated by the heat exchanging unit. Here, these heat exchange means or air blowing means may become non-operating due to failure, maintenance, etc., but if the air-conditioning target room becomes non-air-conditioned due to this, the air-conditioning target room There is a possibility that the environment will be deteriorated, or that it will become impossible to continue business in the air-conditioned room. In particular, if the cooling air is not supplied to the air-conditioning target room in summer, there is a possibility that a device or the like provided in the air-conditioning target room may be damaged due to excessive heat. Therefore, an air conditioning system has been proposed for preventing the air-conditioning target room from being in a non-air-conditioned state even when these heat exchanging means or air blowing means are in a non-operating state.

  As such an air conditioning system, for example, a spare air conditioner is provided in addition to the main air conditioner (including the heat exchange means and the air blowing means described above) for one air conditioning target room, and the main air conditioner fails. There has been proposed an air conditioning system that performs redundancy by operating a spare air conditioner (see, for example, Patent Document 1).

Japanese Patent Publication No. 7-6659

  However, since the air conditioning system according to Patent Document 1 needs to provide a main air conditioner and a spare air conditioner for each air conditioning target room, the number of installed air conditioners increases. Various problems such as an increase, an increase in management cost, and an increase in installation space may occur. In particular, when it is necessary to air-condition a plurality of air-conditioning target rooms, it is necessary to install a spare air conditioner for each air-conditioning target room. Therefore, such a problem may become more serious. was there. Therefore, even when air-conditioning multiple spaces, each space can be made redundant with a simple configuration that reduces the number of installed air conditioners (ie, heat exchange means and air blowing means). There has been a demand for an air conditioning system capable of reducing the risk of being in a state.

  The present invention has been made in view of the above, and even when air conditioning is performed on a plurality of spaces, redundancy of each space is achieved with a simple configuration in which the number of installed heat exchange means and air blowing means is reduced. An object of the present invention is to provide an air conditioning system that can reduce the risk that each space will be in a non-air-conditioned state.

In order to solve the above-described problems and achieve the object, an air conditioning system according to claim 1 is an air conditioning system that performs air conditioning on a first space and a second space, and the first space is a first air conditioning system. First heat exchange means connected via a return air path and a first air supply path, the first heat exchange means for cooling or heating the air, and the second return air path with respect to the second space And a second heat exchange means connected via the second air supply path, the second heat exchange means for cooling or heating the air, and the air cooled or heated by the first heat exchange means First air blowing means for blowing air, second air blowing means for blowing air cooled or heated by the second heat exchange means, and depending on the operating state of the second heat exchange means or the second air blowing means Open and close the open / close door formed between the first space and the second space. And a control means for the, in normal, by closing the door by the control means, thereby disabling the flow of air therebetween of the first space and the second space, the first heat From the exchange means, the first air supply means, the first space, and the first return air passage are sequentially passed to the first heat exchange means using the first blower means, and Air is supplied from the second heat exchange means to the second heat exchange means through the second air supply path, the second space, and the second return air passage in order using the second air blowing means. When the second heat exchanging means or the second air blowing means is not in operation, the control means opens the opening / closing door, thereby allowing the first return air path, the first air supply path, the first Without passing through the two return air passages and the second air supply passage. With a flowable air therebetween and between the second space, from the first heat exchange means, through at least the first space and the second space, wherein to the first heat exchange means the The air is made to flow using one blowing means.

The air conditioning system according to claim 2 is the air conditioning system according to claim 1, wherein the bypass return air path interconnects the first return air path and the second return air path, and the bypass return air path. A bypass return air damper provided on the bypass return air damper, the bypass return air damper for adjusting a flow rate of air flowing through the bypass return air passage, and the control means for controlling the opening and closing of the bypass return air damper. At the time, by closing the bypass return air damper by the control means, the bypass return air passage is disabled to flow the air, and when the second heat exchange means or the second air blowing means is not in operation, By opening the bypass return air damper by the control means, the bypass return air passage is allowed to flow the air, and from the second space, the second return air passage, the front Bypass return air path, and the first return air path sequentially through the using the first blowing means and flowing the air into the first heat exchange means.

An air conditioning system according to claim 3 is the air conditioning system according to claim 1 or 2 , further comprising a bypass air supply path that connects the first air supply path and the second air supply path to each other. When the second heat exchange means or the second air blowing means is not in operation, the first heat exchange means, the first air supply path, the bypass air supply path, and the second air supply path in turn, Air is caused to flow into the second space using the first air blowing means.

According to the air conditioning system of claim 1, when the second heat exchange means or the second air blowing means is not in operation, the first heat exchange means is passed from the first heat exchange means via the first space and the second space. When the second heat exchanging means or the second air blowing means breaks down or when performing maintenance thereof, the air cooled or heated by the first heat exchanging means is transferred to the second space. Since the first heat exchange means can be shared between the first space and the second space, each space can be made redundant with a simple configuration that reduces the number of installed heat exchange means and blower means. It becomes possible to reduce the risk that each space will be in an air-conditioned state.
In addition, since air can flow between the first space and the second space without going through the first return air passage, the first air supply passage, the second return air passage, and the second air supply passage, It becomes possible to flow air through the first space and the second space with an extremely simple configuration.
In addition, since it is provided with an open / close door that is normally closed and opened when the second heat exchange means or the second air blowing means is not in operation, the air cannot normally flow between the first space and the second space. By doing so, each space can be set to a different air conditioning condition, and air can flow between the first space and the second space when the second heat exchange means or the second air blowing means is not in operation. Thus, it is possible to reduce the risk associated with the second space being in an air-free state.

According to the air conditioning system of the second aspect, since the bypass return air passage that interconnects the first return air passage and the second return air passage is provided, the air pressure in the second space can be reduced with a very simple configuration. Thus, the air cooled or heated by the first heat exchanging means can be drawn into the second space, and the risk associated with the second space being in an air-conditioned state can be reduced. .

According to the air conditioning system of the third aspect, since the bypass air supply path that connects the first air supply path and the second air supply path is provided, the first heat exchange means can Air can be flowed into the space, and it is possible to reduce the risk associated with the second space being in an air-free state.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows roughly the air conditioning system which concerns on Embodiment 1 of this invention, Comprising: Fig.1 (a) is a normal time (after-mentioned), FIG.1 (b) is a figure which shows the emergency (after-mentioned). It is. It is a side view which shows roughly the air conditioning system which concerns on Embodiment 2 of this invention, Comprising: Fig.2 (a) is a normal time, FIG.2 (b) is a figure which shows the emergency. FIG. 3 is a side view schematically showing an air conditioning system according to Embodiment 3 of the present invention, in which FIG. 3 (a) is a normal time and FIG. 3 (b) is an emergency time.

  Hereinafter, an embodiment of an air-conditioning system according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited by this embodiment.

[Basic concept of the embodiment]
First, the basic concept of the embodiment will be described. The embodiment is an air conditioning system that generally performs air conditioning on the first space and the second space. Here, the “first space” is one space to be air-conditioned, and its use is arbitrary, but in the embodiment, it will be described as a room used as a known clean room. In addition, the “second space” is the other space to be air-conditioned, and its use is arbitrary. In the embodiment, it is a room used as another known clean room in the same manner as the first space. It will be explained as being. The specific structures of the first space and the second space are known except for special cases, and detailed description thereof is omitted. In addition, although the shape and size of the first space and the second space can be arbitrarily determined, in the embodiment, the first space and the second space have the same shape and the same size for the sake of simplicity of explanation. The description will be made assuming that the chamber is formed.

[Specific contents of the embodiment]
Next, specific contents of the embodiment will be described.

(Embodiment 1)
First, the first embodiment will be described.

(Constitution)
Initially, the structure of the air conditioning system 100 which concerns on this Embodiment 1 is demonstrated. FIG. 1 is a side view schematically showing an air conditioning system 100 according to Embodiment 1, in which FIG. 1 (a) is a normal time and FIG. 1 (b) is an emergency time. The explanation of “normal time” and “emergency” will be described later. Here, as shown in FIG. 1, the air conditioning system 100 schematically includes a first air conditioner 10, a first return air passage 20, a first air supply passage 30, a second air conditioner 40, and a second return air. A path 50, a second air supply path 60, a bypass air supply path 70, a first air supply damper MD1, a second air supply damper MD2, and a bypass air supply damper MD3 are provided, and in addition, a control unit (not shown) is provided. It is configured. The unit composed of the first air conditioner 10, the first return air passage 20, the first air supply passage 30, and the first air supply damper MD1 is referred to as “first system” as necessary, and the first A unit composed of the two air conditioners 40, the second return air passage 50, the second air supply passage 60, and the second air supply damper MD2 will be referred to as “second system” as necessary. In addition, each return air path and each air supply path in FIG. 1 are illustrated by a solid line for a flow path with air flow, and are illustrated by a dotted line for a flow path without air flow. In addition, the direction of air flow in each return air passage and each air supply passage is illustrated by solid arrows. In this way, air circulates in the first system and the second system as described above, but on the basis of any position, the upwind side is referred to as “upstream” and the downwind side is referred to as “downstream” as necessary.

  Here, “normal time” indicates a case where the first system and the second system can normally flow air. In addition, “emergency” indicates a case where the first system or the second system cannot normally flow air, for example, when any device constituting the first system or the second system fails, It is a concept that includes the case of maintaining these devices. In the first embodiment, the description will be made assuming that the second air conditioner 40 of the second system (particularly, a second heat exchanger 41 described later provided in the second air conditioner 40) has failed. Do.

(Configuration-first space and second space)
Here, first, the first space 1 and the second space 2 to which the air conditioning system 100 according to the first embodiment is applied will be described. First, the first space 1 and the second space 2 are spaces that are adjacent to each other in the horizontal direction, and spatially through an opening 3 formed in a wall portion that isolates these spaces from each other. Are connected to each other. Although the size of the opening 3 is arbitrary, it can be formed, for example, as large as a person can pass. Here, an openable / closable door 4 is provided over the entire surface of the opening 3. The open / close door 4 completely shields the opening 3 in the closed state and the first space 1 in the open state. An air flow path is formed in the opening 3 so that air can flow between the second space 2 and the second space 2.

  A first return air port 1 a and a first air supply port 1 b are provided in the ceiling portion of the first space 1. The first return air port 1 a is a known return air port connected to the first return air passage 20, and is a return air port for taking the air in the first space 1 into the first air conditioner 10. The second air supply port 2b is a known air supply port connected to the first air supply path 30, and is an air supply port for supplying air conditioned by the first air conditioner 10 to the first space 1. It is.

  A second return air port 2 a and a second air supply port 2 b are provided in the ceiling portion of the second space 2. The second return air port 2 a is a known return air port connected to the second return air passage 50, and is a return air port for taking the air of the second space 2 into the second air conditioner 40. The second air supply port 2 b is a known air supply port connected to the second air supply path 60, and is an air supply port for supplying air conditioned by the second air conditioner 40 to the second space 2. It is.

(Configuration-air conditioning system)
Then, each component which comprises the air conditioning system 100 is demonstrated.

(Configuration-Air conditioning system-First air conditioner)
The first air conditioner 10 is an air conditioning unit that mainly performs air conditioning of the first space 1. The first air conditioner 10 includes a first heat exchanger 11 and a first blower 12.

  The first heat exchanger 11 is a first heat exchanging means connected to the first space 1 via the first return air passage 20 and the first air supply passage 30, and cools or heats the air. It is a first heat exchange means. Although the specific configuration of the first heat exchanger 11 is arbitrary, in the first embodiment, a known water-cooled cooling coil as a mechanism for cooling air and a mechanism for heating air are used. It demonstrates as what is comprised including both of the well-known heating coils. The cooling coil and the heating coil can be switched and operated. Specifically, the cooling coil is operated during the cooling operation of the first heat exchanger 11, and the heating coil is operated during the heating operation of the first heat exchanger 11. The heating coil is configured to be operated. The configuration of the first heat exchanger 11 is not limited to such a configuration. For example, a known cooling means such as an air-cooled cooling coil may be used instead of the water-cooled cooling coil. Instead, a known heating means such as a known electric heater may be used. Moreover, you may comprise a 1st heat exchanger as what is provided with only any one of such a cooling means or a heating means.

  Here, in FIG. 1, although the 1st heat exchanger 11 is illustrated as what cools or heats only the air taken in from the 1st return air path 20, any position of the 1st return air path 20 is shown. A first outside air passage (not shown) connected to the external space is attached to cool or heat the mixed air of the outside air taken from the first outside air passage and the air taken from the first return air passage 20. It doesn't matter. However, since the configuration for taking in such outside air is known, detailed description thereof will be omitted.

(Configuration-Air conditioning system-First blower)
The first blower 12 is a first blower that blows air cooled or heated by the first heat exchanger 11. Specifically, the first blower 12 includes a blower fan, and is configured as a known blower that blows air by rotating the blower fan. In FIG. 1, the first blower 12 is arranged downstream of the first heat exchanger 11, but not limited thereto, the first blower 12 is arranged upstream of the first heat exchanger 11. It doesn't matter. In addition, you may install the well-known filter (illustration omitted) for purifying the air which passes in any position of the 1st air conditioner 10. FIG.

(Configuration-Air conditioning system-First return airway)
The first return air passage 20 connects the first return air port 1a of the first space 1 and the first air conditioner 10 so that air can flow between the first space 1 and the first air conditioner 10. It is a connection means which connects mutually, Comprising: It is comprised as a well-known duct.

(Configuration-Air conditioning system-First air supply path)
The first air supply path 30 connects the first air supply port 1b of the first space 1 and the first air conditioner 10 so that air can flow between the first space 1 and the first air conditioner 10. It is a connection means which connects mutually, Comprising: It is comprised as a well-known duct. A first air supply damper MD1 is provided in the flow path of the first air supply path 30, and the air flowing through the first air supply path 30 is adjusted by adjusting the opening of the first air supply damper MD1. The flow rate of can be adjusted.

(Configuration-Air conditioning system-Second air conditioner)
The second air conditioner 40 is an air conditioning unit that mainly performs air conditioning of the second space 2. The second air conditioner 40 includes a second heat exchanger 41 and a second blower 42.

  The second heat exchanger 41 is second heat exchange means connected to the second space 2 via the second return air passage 50 and the second air supply passage 60, and cools or heats the air. Second heat exchange means. In addition, since this 2nd heat exchanger 41 can be comprised similarly to the 1st heat exchanger 11, the detailed description is abbreviate | omitted.

  The second blower 42 is a second blower that blows air cooled or heated by the second heat exchanger 41. The second blower 42 is described in the same manner by replacing the first blower 12 with the second blower 42 and replacing the first heat exchanger 11 with the second heat exchanger 41 in the description of the first blower 12 described above. Therefore, detailed description thereof is omitted.

(Configuration-Air conditioning system-Second return airway)
The second return air passage 50 connects the second return air port 2a of the second space 2 and the second air conditioner 40 so that air can flow between the second space 2 and the second air conditioner 40. It is a connection means which connects mutually, Comprising: It is comprised as a well-known duct.

(Configuration-Air conditioning system-Second air supply path)
The second air supply path 60 connects the second air supply port 2b of the second space 2 and the second air conditioner 40 so that air can flow between the second space 2 and the second air conditioner 40. It is a connection means which connects mutually, Comprising: It is comprised as a well-known duct. A second supply damper MD2 is provided in the flow path of the second supply path 60, and the air flowing through the second supply path 60 is adjusted by adjusting the opening of the second supply damper MD2. The flow rate of can be adjusted.

(Configuration-Air conditioning system-Bypass air supply path)
The bypass air supply path 70 is bypass means for connecting the first air supply path 30 and the second air supply path 60 to each other, and is configured as a known duct. Specifically, the bypass air supply path 70 includes a position downstream of the first air supply path 30 where the first air supply damper MD1 is provided and a second air supply damper MD2 in the second air supply path 60. Are connected to a position downstream of the position where the air is provided so that the air can flow. A bypass air supply damper MD3 is provided in the flow path of the bypass air supply path 70, and the flow rate of air flowing through the bypass air supply path 70 is adjusted by adjusting the opening degree of the bypass air supply damper MD3. can do.

(Configuration-Air conditioning system-First air supply damper)
The first air supply damper MD1 is an air volume adjusting means for adjusting the air volume of the first air supply path 30, and is configured as a known damper. The specific type of the first air supply damper MD1 is arbitrary. In the first embodiment, the first air supply damper MD1 is described as a known motor damper whose opening degree can be controlled electrically, but it is manually operated by a handle. A known air volume adjusting damper or the like may be used.

(Configuration-Air conditioning system-Second air supply damper)
The second air supply damper MD2 is an air volume adjusting means for adjusting the air volume of the second air supply path 60, and is configured as a known damper. Since the second air supply damper MD2 can be configured in the same manner as the first air supply damper MD1, detailed description thereof is omitted.

(Configuration-Air conditioning system-Bypass air supply damper)
The bypass air supply damper MD3 is an air volume adjusting means for adjusting the air volume of the bypass air supply path 70, and is configured as a known damper. The bypass supply damper MD3 can be configured in the same manner as the first supply damper MD1, and therefore detailed description thereof is omitted.

(Configuration-Air conditioning system-Control unit)
The control unit is a control unit that controls the air conditioning system 100. This CPU (Central Processing Unit) (not shown) and a program that is interpreted and executed on the CPU are included. This control part operates the 1st air conditioner 10 and the 2nd air conditioner 40, or stops operation by transmitting a control signal with respect to the 1st air conditioner 10 and the 2nd air conditioner 40 which were mentioned above. Further, the control unit transmits a control signal to each damper (in the first embodiment, the first supply damper MD1, the second supply damper MD2, and the bypass supply damper MD3). Adjust the opening of the damper. In addition, the control unit automatically opens or closes the opening / closing door 4 by transmitting a control signal to the opening / closing door 4. Note that a specific configuration for achieving the function of such a control unit is publicly known unless otherwise specified, and detailed description thereof is omitted.

(processing)
Then, the process performed by the air conditioning system 100 comprised in this way is demonstrated. In addition, although the timing which performs the following processes is arbitrary, in this Embodiment 1, it demonstrates as what is performed when the power supply of a control part is set to ON.

  First, a process executed by the control unit when the power of the control unit is turned on will be described. First, the control unit transmits a control signal to the first air conditioner 10 and the second air conditioner 40 to operate the first air conditioner 10 and the second air conditioner 40. Thereafter, the control unit always monitors whether or not the first heat exchanger 11, the first blower 12, the second heat exchanger 41, and the second blower 42 are operating normally. However, since a specific method for such monitoring is publicly known, detailed description thereof is omitted.

(Processing-Normal)
Next, the process performed in the air conditioning system 100 at the normal time will be described with reference to FIG. In addition, the process performed in the air conditioning system 100 at the normal time means that the control unit performs the above monitoring in the first heat exchanger 11, the first blower 12, the second heat exchanger 41, and the second blower 42. Both of these are processes executed when it is determined that they are operating normally.

  First, the control unit disables the flow of air in the bypass supply passage 70 by closing the bypass supply damper MD3, and opens the first supply damper MD1 and the second supply damper MD2 to open the first supply. The air flow in the air passage 30 and the second air supply passage 60 is enabled. In addition, the control unit disables the flow of air through the opening 3 between the first space 1 and the second space 2 by closing the door 4.

  When the first air conditioner 10 and the second air conditioner 40 are operating in such a state, the air exchanged by the first heat exchanger 11 of the first air conditioner 10 is blown by the first blower 12. Then, the air is blown into the first space 1 through the first air supply path 30 and the first air supply port 1b. The air blown into the first space 1 returns again to the first air conditioner 10 via the first return air port 1a and the first return air passage 20. Moreover, the air heat-exchanged by the 2nd heat exchanger 41 of the 2nd air conditioning machine 40 is ventilated by the 2nd air blower 42, and is 2nd via the 2nd air supply path 60 and the 2nd air supply port 2b. The air is blown into the space 2. Then, the air blown into the second space 2 returns again to the second air conditioner 40 via the second return air port 2a and the second return air passage 50.

  Thus, in normal times, air does not flow in the bypass air supply path 70 connecting the first air supply path 30 and the second air supply path 60, and the first space 1 and the second space 2 Since the opening 3 between the two is closed by the door 4, the air flowing through the first system and the air flowing through the second system do not interfere with each other. That is, during normal times, the first space 1 is air-conditioned by the first system, and the second space 2 is air-conditioned by the second system.

(Processing-emergency)
Next, processing executed by the air conditioning system 100 in an emergency will be described with reference to FIG. In addition, the process performed in the air conditioning system 100 in an emergency means that the control unit performs the above monitoring in the first heat exchanger 11, the first blower 12, the second heat exchanger 41, and the second blower 42. This process is executed when it is determined that one of the above is not operating normally. That is, in the state where the bypass air supply damper MD3 is closed and the first air supply damper MD1 and the second air supply damper MD2 are opened as in the normal state, for example, the second heat exchanger 41 is out of order and becomes inoperable. In this case, since the air that has been air-conditioned does not reach the second space 2, the second space 2 is not air-conditioned. Therefore, in order not to make the 2nd space 2 into an air-conditioningless state, a control part performs the following processes. In the first embodiment, a process when it is determined that the second heat exchanger 41 is not operating normally will be described.

  First, the control unit enables the flow of air in the bypass air supply passage 70 by opening the bypass air supply damper MD3, and closes the second air supply damper MD2 to close the second supply air in the second air supply passage 60. The flow of air at the position where the air damper MD2 is attached is disabled. Note that the control unit maintains the first supply damper MD1 in the opened state as in the normal state. Further, the control unit enables the flow of air through the opening 3 between the first space 1 and the second space 2 by opening the open / close door 4. Further, the control unit determines that there is no meaning in operating the second fan 42 as long as the second heat exchanger 41 is not operating, and causes the second fan 42 to be inactive.

  In such a state, when the first air conditioner 10 is operating normally, the air heat-exchanged by the first heat exchanger 11 of the first air conditioner 10 is blown by the first blower 12, and the first The air supply passage 30 flows. Here, the air flowing through the first air supply path 30 is the air taken into the first space 1 through the first air supply port 1 b and the bypass air supply path 70 from the middle of the first air supply path 30. And a part of the second air supply passage 60 (a flow passage downstream of the connection position between the second air supply passage 60 and the bypass air supply passage 70) and the second air supply port 2b. The air is taken into the second space 2 through the second hand.

  Among these, the air taken into the first space 1 returns again to the first air conditioner 10 via the first return air port 1 a and the first return air passage 20. The air taken into the second space 2 has a negative pressure in the first space 1 as compared with the second space 2 because the air is sucked in at the first return air port 1a. 3 flows to the first space 1 through 3. The air thus taken into the first space 1 returns again to the first air conditioner 10 through the first return air port 1a and the first return air passage 20. In addition, since the 2nd air supply damper MD2 is closed and the 2nd air blower 42 has stopped operation | movement, the air taken in into the 2nd space 2 is taken in into the 2nd return air port 2a on the relationship of atmospheric pressure. It will never be done. That is, in the second return air passage 50, the second air conditioner 40, and a part of the second air supply passage 60 (a flow passage upstream of the connection position between the second air supply passage 60 and the bypass air supply passage 70). The air will not flow.

  Thus, in an emergency, air flows through the bypass air supply passage 70 that connects the first air supply passage 30 and the second air supply passage 60, so that heat is exchanged in the first heat exchanger 11. Air can be blown to the second space 2. Moreover, since air flows into the opening part 3 between the 1st space 1 and the 2nd space 2 by opening the opening-and-closing door 4, the 1st air conditioner by using the air ventilated to the 2nd space 2 as return air 10 again. Here, in order to cause air to flow into the second space 2, it is necessary not only to supply air to the second space 2 but also to discharge the air from the second space 2 to reduce the atmospheric pressure due to the atmospheric pressure. is there. In order to achieve such an object, it is not necessary to provide the open / close door 4 as in the first embodiment. For example, an exhaust port (not shown) is provided in the second space 2 and connected to the external space by a duct. The air pressure in the second space 2 can be reduced by exhausting with a known fan or the like. However, as in the first embodiment, by flowing air through the opening 3, the exhaust is performed only from the exhaust port (not shown) formed in the second space 2 to the external space. The air pressure in the second space 2 can be further reduced, and the air can flow more smoothly. In addition, without returning the air in the second space 2 in this way, the exhaust may be performed only from an exhaust port (not shown) formed in the second space 2 to the external space. In addition, since the second air supply damper MD2 is closed, the cause of the failure is caused by the first system device or the like due to air flowing into the failed second heat exchanger 41. It is possible to prevent adverse effects. This is the end of the description of the processing executed in the first embodiment.

(Effect of embodiment)
As described above, according to the present embodiment, when the second heat exchanger 41 or the second blower 42 is not in operation, the first heat exchanger 11 passes through the first space 1 and the second space 2 to Since air flows to the heat exchanger 11, the second heat exchanger 41 or the second blower 42 is cooled or heated by the first heat exchanger 11 even when it fails or when maintenance is performed. Since the air can be blown to the second space 2 and the first heat exchanger 11 can be shared between the first space 1 and the second space 2, each of the heat exchangers and the blowers can be simply configured with a reduced number of installed units. The space can be made redundant, and the risk that each space is not air-conditioned can be reduced.

  In addition, air is passed between the first space 1 and the second space 2 without going through the first return air passage 20, the first air supply passage 30, the second return air passage 50, and the second air supply passage 60. Since it is allowed to flow, air can be flowed through the first space 1 and the second space 2 with a very simple configuration.

  Moreover, since the open / close door 4 that is normally closed and opened when the second heat exchanger 41 or the second blower 42 is not in operation is provided, air is normally provided between the first space 1 and the second space 2. By making the flow impossible, each space can be set to different air conditioning conditions, and between the first space 1 and the second space 2 when the second heat exchanger 41 or the second blower 42 is not in operation. In addition, by allowing air to flow, it is possible to reduce the risk associated with the second space 2 being in an air-free state.

  Moreover, since the bypass air supply path 70 which connects the 1st air supply path 30 and the 2nd air supply path 60 is provided mutually, air is supplied from the 1st heat exchanger 11 to the 2nd space 2 by a very simple structure. It can be made to flow, and it becomes possible to reduce the risk accompanying the 2nd space 2 becoming a non-air-conditioning state.

(Embodiment 2)
Next, the second embodiment will be described. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment except where otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals are attached as necessary, and the description thereof is omitted.

(Configuration-air conditioning system)
Initially, the structure of the air conditioning system 200 which concerns on this Embodiment 2 is demonstrated. FIG. 2 is a side view schematically showing an air conditioning system 200 according to Embodiment 2, in which FIG. 2 (a) is a normal time and FIG. 2 (b) is an emergency time. As shown in FIG. 2, the air conditioning system 200 schematically includes a first air conditioner 10, a first return air path 20, a first air supply path 30, a second air conditioner 40, a second return air path 50, A second air supply path 60, a bypass return air path 80, a first air supply damper MD 1, a second air supply damper MD 2, and a bypass return air damper MD 4 are provided, and in addition to this, a control unit (not shown) is provided. Yes. In addition, about each component other than the bypass return air path 80 and the bypass return air damper MD4, since it can be comprised similarly to Embodiment 1, the detailed description is abbreviate | omitted.

(Configuration-Air conditioning system-Bypass return airway)
The bypass return air passage 80 is bypass means for connecting the first return air passage 20 and the second return air passage 50 to each other, and is configured as a known duct. Specifically, the bypass return air passage 80 connects any position in the first return air passage 20 and any position in the second return air passage 50 so that air can flow between each other. ing. A bypass return air damper MD4 is provided in the flow path of the bypass return air path 80, and the flow rate of air flowing through the bypass return air path 80 is adjusted by adjusting the opening degree of the bypass return air damper MD4. can do.

(Configuration-Air conditioning system-Bypass return air damper)
The bypass return air damper MD4 is an air volume adjusting means for adjusting the air volume of the bypass return air path 80, and is configured as a known damper. Note that the bypass return damper MD4 can be configured in the same manner as other dampers such as the first supply damper MD1, and a detailed description thereof will be omitted.

(processing)
Then, the process performed by the air conditioning system 200 comprised in this way is demonstrated. When the power supply of the control unit is turned on, the control unit operates the first air conditioner 10 and the second air conditioner 40 as well as the first heat exchanger 11, the first heat exchanger 11, and the first heat exchanger 11. It is monitored whether the blower 12, the second heat exchanger 41, and the second blower 42 are operating normally.

(Processing-Normal)
First, the process performed in the air conditioning system 200 at the normal time will be described with reference to FIG. As in the first embodiment, the control unit determines that all of the first heat exchanger 11, the first blower 12, the second heat exchanger 41, and the second blower 42 are operating normally. In such a case, the following process will be described.

  First, the control unit disables the flow of air in the bypass return air passage 80 by closing the bypass return air damper MD4, and opens the first air supply damper MD1 and the second air supply damper MD2 to open the first air supply. The air flow in the air passage 30 and the second air supply passage 60 is enabled. In addition, the control unit disables the flow of air through the opening 3 between the first space 1 and the second space 2 by closing the door 4.

  When the first air conditioner 10 and the second air conditioner 40 are operating in such a state, the air exchanged by the first heat exchanger 11 of the first air conditioner 10 is blown by the first blower 12. Then, the air is blown into the first space 1 through the first air supply path 30 and the first air supply port 1b. The air blown into the first space 1 returns again to the first air conditioner 10 via the first return air port 1a and the first return air passage 20. Moreover, the air heat-exchanged by the 2nd heat exchanger 41 of the 2nd air conditioning machine 40 is ventilated by the 2nd air blower 42, and is 2nd via the 2nd air supply path 60 and the 2nd air supply port 2b. The air is blown into the space 2. Then, the air blown into the second space 2 returns again to the second air conditioner 40 via the second return air port 2a and the second return air passage 50.

(Processing-emergency)
Next, processing executed by the air conditioning system 200 in an emergency will be described with reference to FIG. In addition, the case where the 2nd heat exchanger 41 fails also in this Embodiment 2 similarly to Embodiment 1 is assumed. And when a control part determines with the 2nd heat exchanger 41 not operating normally, it demonstrates as what performs the process shown below.

  First, the control unit enables the flow of air in the bypass return air passage 80 by opening the bypass return air damper MD4, and closes the second air supply damper MD2 to make the second air supply damper in the second air supply passage 60 open. The flow of air at the position where MD2 is attached is disabled. Note that the control unit maintains the first supply damper MD1 in the opened state as in the normal state. Further, the control unit enables the flow of air through the opening 3 between the first space 1 and the second space 2 by opening the open / close door 4. Further, the control unit determines that there is no meaning in operating the second fan 42 as long as the second heat exchanger 41 is not operating, and causes the second fan 42 to be inactive.

  In such a state, when the first air conditioner 10 is operating normally, the air heat-exchanged by the first heat exchanger 11 of the first air conditioner 10 is blown by the first blower 12, and the first The air is taken into the first space 1 through the air supply path 30 and the first air supply port 1b. Here, in the first space 1, air supply and return air are performed, while in the second space 2, air supply is not performed and only return air is performed. The pressure is more negative than the space 1. For this reason, the air taken into the first space 1 flows separately into the air taken into the first return port 1a and the air taken into the second space 2. Then, the air taken into the first return air port 1 a is taken into the first air conditioner 10 again through the first return air passage 20. In addition, the air taken into the second space 2 is a part of the second return air port 2a and the second return air passage 50 (from the connection position of the second return air passage 50 and the bypass return air passage 80). (Upstream flow path), bypass flow return path 80, and partial flow path of first return flow path 20 (flow path downstream from the connection position between first return flow path 20 and bypass return flow path 80). It is taken into the first air conditioner 10 again sequentially. In addition, since the 2nd air supply damper MD2 is closed and the 2nd air blower 42 has stopped operation | movement, the air taken in from the 2nd return air port 2a on the relationship of atmospheric pressure is the 2nd return air path. 50 does not flow in the flow path downstream of the connection position of the bypass return air path 80. That is, a part of the second return air passage 50 (a flow path downstream from the connection position between the second return air passage 50 and the bypass return air passage 80), the second air conditioner 40, and the second air supply passage 60. The air will not flow.

  In this way, in an emergency, since the air flows into the opening 3 between the first space 1 and the second space 2 by opening the door 4, the air-conditioning is performed by the first air conditioner 10. Air can be taken into the second space 2 through the opening 3 with a very simple configuration. Moreover, since air flows into the bypass return air passage 80 that connects the first return air passage 20 and the second return air passage 50, the air blown into the second space 2 is returned to the first air conditioner 10 as return air. It can be incorporated. Therefore, as in the first embodiment, the air pressure in the second space 2 can be further reduced as compared with the case where the exhaust is performed only from the exhaust port (not shown) formed in the second space 2 to the external space. It is possible to flow the air more smoothly. In addition, without returning the air in the second space 2 in this way, the exhaust may be performed only from an exhaust port (not shown) formed in the second space 2 to the external space. In addition, since the second air supply damper MD2 is closed, the cause of the failure is caused by the first system device or the like due to air flowing into the failed second heat exchanger 41. It is possible to prevent adverse effects. This is the end of the description of the processing executed in the second embodiment.

(Effect of embodiment)
As described above, according to the second embodiment, the bypass return air passage 80 that connects the first return air passage 20 and the second return air passage 50 to each other is provided. The air pressure can be reduced, and the air cooled or heated by the first heat exchanger 11 can be drawn into the second space 2, and there is a risk associated with the second space 2 becoming unconditioned. It becomes possible to reduce.

(Embodiment 3)
Subsequently, Embodiment 3 will be described. The configuration of the third embodiment is substantially the same as the configuration of the first and second embodiments except where otherwise specified, and is substantially the same as the configuration of the first and second embodiments. Are denoted by the same reference numerals as used in the first and second embodiments as necessary, and the description thereof is omitted.

(Configuration-air conditioning system)
Initially, the structure of the air conditioning system 300 which concerns on this Embodiment 3 is demonstrated. FIG. 3 is a side view schematically showing an air conditioning system 300 according to the third embodiment, in which FIG. 3 (a) is a normal time and FIG. 3 (b) is an emergency time. As shown in FIG. 3, the air conditioning system 300 schematically includes a first air conditioner 10, a first return air path 20, a first air supply path 30, a second air conditioner 40, a second return air path 50, A second air supply path 60, a bypass return air path 80, a bypass air supply path 70, a first air supply damper MD1, a second air supply damper MD2, a bypass return air damper MD4, and a bypass air supply damper MD3 are provided. In addition, a control unit (not shown) is provided. Note that any of the components can be configured similarly to the configuration described in the first embodiment or the second embodiment, and thus detailed description thereof is omitted.

  Here, the first space 1 and the second space 2 according to the third embodiment are not adjacent to each other as shown in FIG. 3, and the opening 3 as shown in the first embodiment or the second embodiment is provided. Not connected through. Thus, this Embodiment 3 is a form regarding the air-conditioning system 300 for not making both the 1st space 1 and the 2nd space 2 into a no air-conditioning state at the time of emergency, even when it does not have the opening part 3. FIG. .

(processing)
Then, the process performed by the air conditioning system 300 comprised in this way is demonstrated. When the power supply of the control unit is turned on, the control unit operates the first air conditioner 10 and the second air conditioner 40 as well as the first heat exchanger 11, the first heat exchanger 11, and the first heat exchanger 11. It is monitored whether the blower 12, the second heat exchanger 41, and the second blower 42 are operating normally.

(Processing-Normal)
First, the process performed in the air conditioning system 300 at the normal time will be described with reference to FIG. As in the first and second embodiments, the first heat exchanger 11, the first blower 12, the second heat exchanger 41, and the second blower 42 are all operating normally. If it is determined, the following processing will be described.

  First, the control unit disables the flow of air in the bypass supply passage 70 by closing the bypass supply damper MD3, and further disables the flow of air in the bypass return passage 80 by closing the bypass return damper MD4. And Moreover, the flow of air in the first air supply path 30 and the second air supply path 60 is enabled by opening the first air supply damper MD1 and the second air supply damper MD2.

  When the first air conditioner 10 and the second air conditioner 40 are operating in such a state, the air exchanged by the first heat exchanger 11 of the first air conditioner 10 is blown by the first blower 12. Then, the air is blown into the first space 1 through the first air supply path 30 and the first air supply port 1b. The air blown into the first space 1 returns again to the first air conditioner 10 via the first return air port 1a and the first return air passage 20. Moreover, the air heat-exchanged by the 2nd heat exchanger 41 of the 2nd air conditioning machine 40 is ventilated by the 2nd air blower 42, and is 2nd via the 2nd air supply path 60 and the 2nd air supply port 2b. The air is blown into the space 2. Then, the air blown into the second space 2 returns again to the second air conditioner 40 via the second return air port 2a and the second return air passage 50.

(Processing-emergency)
Next, processing executed by the air conditioning system 300 in an emergency will be described with reference to FIG. In addition, the case where the 2nd heat exchanger 41 fails also in this Embodiment 3 similarly to Embodiment 1 and Embodiment 2 is assumed. And when a control part determines with the 2nd heat exchanger 41 not operating normally, it demonstrates as what performs the process shown below.

  First, the control unit enables air flow in the bypass return air passage 80 by opening the bypass return air damper MD4, and further enables air flow in the bypass air supply passage 70 by opening the bypass air supply damper MD3. And Further, by closing the second air supply damper MD2, the flow of air at the position where the second air supply damper MD2 is attached in the second air supply path 60 is disabled. Note that the control unit maintains the first supply damper MD1 in the opened state as in the normal state. Further, the control unit determines that there is no meaning in operating the second fan 42 as long as the second heat exchanger 41 is not operating, and causes the second fan 42 to be inactive.

  In such a state, when the first air conditioner 10 is operating normally, the air heat-exchanged by the first heat exchanger 11 of the first air conditioner 10 is blown by the first blower 12, and the first The air supply passage 30 flows. Here, the air flowing through the first air supply path 30 is the air taken into the first space 1 via the first air supply port 1 b and the bypass air supply path 70 from the middle of the first air supply path 30. Incorporated, through a part of the second air supply passage 60 (a flow passage downstream from the connection position between the second air supply passage 60 and the bypass air supply passage 70) and the second air supply port 2b. The air is taken into the second space 2.

  Here, the air taken into the first space 1 returns again to the first air conditioner 10 via the first return air port 1 a and the first return air passage 20. In addition, the air taken into the second space 2 is a part of the second return air port 2a and the second return air passage 50 (from the connection position of the second return air passage 50 and the bypass return air passage 80). (The upstream flow path), the bypass return air passage 80, and the first return air passage 20 in order, are again taken into the first air conditioner 10.

  Thus, in an emergency, air flows through the bypass air supply passage 70 that connects the first air supply passage 30 and the second air supply passage 60, so that heat is exchanged in the first heat exchanger 11. Air can be blown to the second space 2. Moreover, since air flows into the bypass return air passage 80 that connects the first return air passage 20 and the second return air passage 50, the air blown into the second space 2 is returned to the first air conditioner 10 as return air. It can be incorporated. Therefore, as in the first embodiment, the air pressure in the second space 2 can be further reduced as compared with the case where the exhaust is performed only from the exhaust port (not shown) formed in the second space 2 to the external space. It is possible to flow the air more smoothly. In addition, without returning the air in the second space 2 in this way, the exhaust may be performed only from an exhaust port (not shown) formed in the second space 2 to the external space. In addition, since the second air supply damper MD2 is closed, the cause of the failure is caused by the first system device or the like due to air flowing into the failed second heat exchanger 41. It is possible to prevent adverse effects. This is the end of the description of the processing executed in the third embodiment.

(Effect of embodiment)
Thus, according to this Embodiment 3, the 1st space 1 and the 2nd space 2 are the 1st return airway 20, the 1st supply airway 30, the 2nd return airway 50, and the 2nd supply airway. Even when not connected to each other by a flow path other than one of the flow paths 60, the air cooled or heated by the first heat exchanger 11 can be blown to the second space 2, and the first heat Since the exchanger 11 can be shared by the first space 1 and the second space 2, each space can be made redundant with a simple configuration in which the number of installed heat exchangers and blowers is reduced. It becomes possible to reduce the risk of becoming a state.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved. For example, even when the risk of each space becoming non-air-conditioned by the processing of the air-conditioning system 300 according to each embodiment cannot be reduced or when the same level of risk as in the conventional case is exhibited, redundancy is achieved by a technique different from the conventional one. If the conversion is achieved, the problem of the present invention is solved.

(About the space where the air conditioning system is applied)
In each of the embodiments, the air conditioning systems 100, 200, 300 are described as being applied to the first space 1 and the second space 2 arranged in parallel along the horizontal direction, but at least a plurality of spaces. As long as the air conditioning system 100, 200, 300 can be applied to any space. For example, it is possible to make three or more spaces redundant by connecting to three or more spaces via the bypass air supply passage 70 and the bypass return air passage 80 in the same manner. Further, not only the horizontal direction but also a plurality of spaces arranged along the vertical direction, for example, can be similarly configured. In particular, in the configuration as in the third embodiment, even when a plurality of spaces are interspersed, the air supply path and the return air path of each space are connected by the bypass air supply path 70 and the bypass return air path 80. By doing so, it becomes possible to easily make the plurality of interspersed spaces redundant.

  In the first embodiment and the second embodiment, the first space 1 and the second space 2 are adjacent to each other across the wall portion, and are mutually connected through the opening 3 provided in the wall portion. Although described as being connected, it is not limited to this. For example, the first space 1 and the second space 2 are not adjacent to each other across the wall but are arranged at remote positions, and the first space 1 and the second space 2 may be connected to each other by a duct. Absent. Further, a damper for adjusting the flow rate of the duct may be provided in place of the opening / closing door 4, and the damper may be closed in a normal state and opened in an emergency.

(About the control unit)
In each embodiment, it has been described that each device constituting the air conditioning system 100, 200, 300 is electrically controlled by the control unit. However, the present invention is not limited to this, and the user can manually open and close each damper. good. In particular, the open / close door 4 may be formed so as to be automatically openable / closable due to a pressure difference.

(Emergency)
In each embodiment, although the case where the 2nd heat exchanger 41 failed was demonstrated as an emergency, it is not restricted to this. For example, when the second blower 42 fails, when both the second heat exchanger 41 and the second blower 42 fail, when the second air supply path 60 and the second return air path 50 are damaged, the second air supply Even when the damper MD2 breaks down, or when maintaining any one of the second systems, etc., there is an emergency when there is any reason for the non-operation of the second heat exchanger 41 or the second blower 42. good. In addition, when the first system such as the first heat exchanger 11 fails, the same explanation is given by exchanging the terms “first” and “second” in the description according to each embodiment described above. Is possible.

(About air supply and return air outlet)
In each of the embodiments, the first return air port 1a, the first air supply port 1b, the second return air port 2a, and the second air supply port 2b have been described as being arranged on the ceiling portion. Absent. For example, any one or all of these may be installed on the floor or wall. In particular, in the first embodiment, by arranging the second air supply port 2b at a position far from the open / close door 4, it is possible to more effectively distribute the air-conditioned air throughout the second space 2. In the second embodiment, by arranging the second return air port 2a at a position far from the opening / closing door 4, it is possible to more effectively distribute the air-conditioned air throughout the second space 2.

(Appendix)
The air conditioning system of Appendix 1 is an air conditioning system that performs air conditioning on the first space and the second space, and is connected to the first space via a first return air passage and a first air supply passage. Heat exchange means, first heat exchange means for cooling or heating air, and second heat exchange means connected to the second space via a second return air passage and a second air supply passage The second heat exchange means for cooling or heating the air, the first air blowing means for blowing the air cooled or heated by the first heat exchange means, and the second heat exchange means Second air blowing means for blowing air that has been cooled or heated, and, at normal times, from the first heat exchange means, the first air supply path, the first space, and the first return air path The air is made to flow to the first heat exchanging means through the first air blowing means sequentially, and the front Air flows from the second heat exchanging means to the second heat exchanging means through the second air supply path, the second space, and the second return air path in order using the second air blowing means. When the second heat exchanging means or the second air blowing means is not in operation, the first heat exchanging means passes through the first space and the second space to the first heat exchanging means. Air is caused to flow using the first air blowing means.

  The air conditioning system according to appendix 2 is the air conditioning system according to appendix 1, wherein the air supply system does not go through the first return air passage, the first air supply passage, the second return air passage, and the second air supply passage. Air can flow between the first space and the second space.

  The air conditioning system according to appendix 3 is the air conditioning system according to appendix 2, wherein the first space and the second space are mutually connected by an open / close door formed to be openable and closable between the first space and the second space. And the open / close door is closed during the normal time so that air cannot flow between the first space and the second space, and the second heat exchange means or the second air blowing means. The air is allowed to flow between the first space and the second space by being in an open state when not operating.

  The air conditioning system according to appendix 4 is the air conditioning system according to appendix 2 or 3, comprising a bypass air supply path that connects the first air supply path and the second air supply path to each other, and the second heat exchange means. Alternatively, when the second air blowing unit is not in operation, the first heat exchange unit sequentially enters the second space through the first air supply path, the bypass air supply path, and the second air supply path. And air is flowed using the first air blowing means.

  The air conditioning system according to appendix 5 is the air conditioning system according to any one of appendices 2 to 4, and includes a bypass return air path that interconnects the first return air path and the second return air path, When the second heat exchange means or the second air blowing means is not in operation, the second space, the second return air passage, the bypass return air passage, and the first return air passage sequentially, the first Air is caused to flow to the one heat exchanging means using the first air blowing means.

(Additional effects)
According to the air conditioning system of appendix 1, when the second heat exchange means or the second air blowing means is not in operation, the first heat exchange means passes through the first space and the second space to the first heat exchange means. When the second heat exchanging means or the second air blowing means breaks down or when performing maintenance of the air, the air cooled or heated by the first heat exchanging means is supplied to the second space. Since the first heat exchange means can be shared between the first space and the second space, each space can be made redundant with a simple configuration in which the number of installed heat exchange means and blowers is reduced. It is possible to reduce the risk that each space will be in an air-free state.

  According to the air conditioning system of appendix 2, between the first space and the second space without passing through the first return air passage, the first air supply passage, the second return air passage, and the second air supply passage. Since the air can flow, the air can flow through the first space and the second space with a very simple configuration.

  According to the air conditioning system of appendix 3, since it includes the open / close door that is normally closed and opened when the second heat exchange means or the second air blowing means is not in operation, the first space and the second space are normally provided. By making the air non-flowable between each space, it becomes possible to set each space to different air conditioning conditions, and when the second heat exchange means or the second air blowing means is not operating, the first space and the second space By allowing air to flow between each other, it is possible to reduce the risk associated with the second space becoming air-free.

  According to the air conditioning system described in appendix 4, since the bypass air supply path that connects the first air supply path and the second air supply path to each other is provided, the first heat exchanging means and the second space can be provided with a very simple configuration. It is possible to reduce the risk associated with the second space being in an air-free state.

  According to the air conditioning system described in appendix 5, since the bypass return air passage that interconnects the first return air passage and the second return air passage is provided, the air pressure in the second space can be reduced with an extremely simple configuration. The air cooled or heated by the first heat exchange means can be drawn into the second space, and the risk associated with the second space being in an air-conditioned state can be reduced.

DESCRIPTION OF SYMBOLS 1 1st space 1a 1st return air port 1b 1st air supply port 2 2nd space 2a 2nd return air port 2b 2nd air supply port 3 Opening part 4 Opening / closing door 10 1st air conditioner 11 1st heat exchanger 12 First blower 20 First return air passage 30 First air supply passage 40 Second air conditioner 41 Second heat exchanger 42 Second blower 50 Second return air passage 60 Second air supply passage 70 Bypass air supply passage 80 Bypass return Airway 100 Air conditioning system 200 Air conditioning system 300 Air conditioning system MD1 First air supply damper MD2 Second air supply damper MD3 Bypass air supply damper MD4 Bypass return air damper

Claims (3)

An air conditioning system for air conditioning the first space and the second space,
A first heat exchange means connected to the first space via a first return air passage and a first air supply passage, wherein the first heat exchange means cools or heats the air;
Second heat exchange means connected to the second space via a second return air passage and a second air supply passage, wherein the second heat exchange means cools or heats the air;
First blowing means for blowing air cooled or heated by the first heat exchange means;
Second air blowing means for blowing air cooled or heated by the second heat exchange means ;
Control means for controlling opening / closing of an open / close door formed to be openable and closable between the first space and the second space according to an operating state of the second heat exchange means or the second air blowing means. ,
During normal times
By closing the open / close door by the control means, air cannot flow between the first space and the second space, and from the first heat exchange means, the first air supply path, Air is flowed to the first heat exchanging means through the first space and the first return air passage by using the first air blowing means, and from the second heat exchanging means to the second supply air. The air is caused to flow using the second air blowing means to the second heat exchange means through the air path, the second space, and the second return air passage in order.
During non-operation of the second heat exchange means or the second air blowing means,
By opening the open / close door by the control means, the first space without passing through the first return air passage, the first air supply passage, the second return air passage, and the second air supply passage. And air between the second space and the first heat exchange means to the first heat exchange means through at least the first space and the second space. Use air blowing means to flow air,
Air conditioning system. A bypass return airway interconnecting the first return airway and the second return airway;
A bypass return air damper provided in the bypass return air path, the bypass return air damper for adjusting a flow rate of air flowing in the bypass return air path;
The control means for controlling opening and closing the bypass return air damper,
In the normal time, by closing the bypass return air damper by the control means, the bypass return air passage is disabled to flow the air,
When the second heat exchanging means or the second air blowing means is not in operation, the control means opens the bypass return air damper, thereby allowing the air to flow through the bypass return air path, and Air is flowed from the second space to the first heat exchanging means through the second return air passage, the bypass return air passage, and the first return air passage sequentially. ,
The air conditioning system according to claim 1. A bypass air supply path connecting the first air supply path and the second air supply path to each other;
When the second heat exchange means or the second air blowing means is not in operation, the first heat exchange means, the first air supply path, the bypass air supply path, and the second air supply path are sequentially passed through. , Causing the air to flow into the second space using the first blowing means,
The air conditioning system according to claim 1 or 2 .

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