JP2016223643A - Air conditioning ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely suppress occurrence of an accident due to leakage of a refrigerant from an air conditioner, in an air conditioning ventilation system which includes the air conditioner having a refrigerant circuit in which a refrigerant circulates and for performing air conditioning of an air-conditioned space, and a ventilation device for performing ventilation of the air-conditioned space.SOLUTION: An air conditioning control device (12) for controlling component devices of an air conditioner (1), when leakage of a refrigerant is detected in a state where the air conditioner (1) and ventilation devices (6a, 6b) are communicably connected, commands ventilation control devices (160a, 160b) for controlling the component devices of the ventilation devices (6a, 6b) to perform an operation of the ventilation devices (6a, 6b). Then, here, in the case where air quantity insufficiency of the ventilation device (6a, 6b) occurs in the operation of the ventilation devices (6a, 6b) when the leakage of the refrigerant is detected, the air conditioning control device (12) increases the air quantity of the air conditioner (1).SELECTED DRAWING: Figure 9

Description

  The present invention relates to an air-conditioning ventilation system, and more particularly, to an air-conditioning ventilation system including an air-conditioning apparatus that has a refrigerant circuit in which refrigerant circulates and performs air-conditioning of an air-conditioned space, and a ventilating apparatus that ventilates the air-conditioned space.

  Conventionally, as shown in Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-74283), an indoor unit of an air conditioner having a refrigerant circuit in which a flammable refrigerant circulates and a ventilation fan (ventilator) are placed indoors (air-conditioned space). When the leakage of the flammable refrigerant is detected, a configuration is proposed in which the flammable refrigerant is discharged from the air-conditioned space by operating the ventilation device.

  Here, when the air-conditioned space is air-conditioned and ventilated by installing the air-conditioner and the ventilator in a building such as a building, the air-conditioner and the ventilator are actually independent of each other. In many cases, it is installed. That is, various types of ventilators such as those having a fan like a ventilator, those having a total heat exchanger for exhaust heat recovery, those having a dehumidifier for dehumidification and humidification, etc. Since the air conditioner is selected according to the needs of the user independently of the air conditioner, the air conditioner and the ventilator are often installed independently by different contractors at the installation site.

  However, even when such an air conditioner and a ventilator are selected and installed independently, leakage of refrigerant from the air conditioner causes oxygen deficiency accidents and ignition accidents in the air-conditioned space (the refrigerant slightly burns). To prevent the occurrence of accidents or poisoning (if the refrigerant is toxic), ventilate when the refrigerant leaks, and in the air-conditioned space, the oxygen deficiency concentration, flammability concentration or It is important not to exceed the toxic limit concentration. For this reason, when the air conditioner and the ventilator are selected and installed independently, the air conditioner and the ventilator are operated so that the ventilator can be operated when the refrigerant leaks from the air conditioner. It is conceivable to adopt a configuration in which these are connected for communication.

  However, even if a configuration is adopted in which the ventilator is operated when the refrigerant leaks from the air conditioner by communication connection between the air conditioner and the ventilator, There is a risk that the discharge of the refrigerant from the space becomes insufficient and the occurrence of an accident due to the leakage of the refrigerant from the air conditioner cannot be suppressed.

  An object of the present invention is to provide an air conditioning ventilation system that includes a refrigerant circuit that circulates refrigerant and performs air conditioning of the air-conditioned space, and a ventilation device that ventilates the air-conditioned space. It is to reliably suppress the occurrence of accidents due to refrigerant leakage.

  The air-conditioning ventilation system concerning a 1st viewpoint has the refrigerant circuit which a refrigerant | coolant circulates, and contains the air conditioning apparatus which air-conditions an air-conditioned space, and the ventilation apparatus which ventilates an air-conditioned space. Here, the air conditioning control device that controls the constituent devices of the air conditioner is a ventilation control device that controls the constituent devices of the ventilating device when leakage of refrigerant is detected in a state where the air conditioning device and the ventilating device are connected in communication. Is instructed to operate the ventilator. In this case, if the air flow of the ventilator is insufficient during the operation of the ventilator when leakage of the refrigerant is detected, the air conditioning controller increases the air volume of the air conditioner.

  Here, as described above, first, the air conditioner and the ventilator are communicatively connected, and when the refrigerant leaks from the air conditioner, the ventilator is operated by a command from the air conditioner controller to the ventilation controller. Thus, the refrigerant leaked from the air-conditioned space can be discharged. At this time, a ventilator having an air volume performance that can prevent the leaked refrigerant from accumulating in the air-conditioned space is installed.

  However, in such a configuration, when an air flow shortage occurs due to a malfunction of the ventilation device, the leaked refrigerant easily accumulates in the air-conditioned space, and the refrigerant is not sufficiently discharged from the air-conditioned space.

  Therefore, here, in addition to the above-described configuration, in addition, when the air flow of the ventilator is insufficient in the operation of the ventilator when the leakage of the refrigerant is detected, the air conditioning control device For example, the air volume of an indoor fan for supplying room air to the air-conditioned space is increased.

  Thereby, here, when the air flow of the ventilator is insufficient in the operation of the ventilator when the leakage of the refrigerant is detected, by increasing the air volume of the air conditioner, the leaked refrigerant enters the air-conditioned space. Even if it is a ventilator that prevents accumulation and has a shortage of airflow, the refrigerant leaked from the air-conditioned space can be discharged, so that it is possible to reliably suppress the occurrence of accidents due to refrigerant leakage from the air conditioner. it can.

  In the air-conditioning ventilation system according to the second aspect, in the air-conditioning ventilation system according to the first aspect, the air-conditioning control apparatus increases the air volume of the air-conditioning apparatus even when an abnormality occurs in the communication connection between the air-conditioning apparatus and the ventilation apparatus. Let

  In order for the air conditioning controller to know whether there is a shortage of airflow in the ventilation device, it is assumed that the communication connection between the air conditioning device and the ventilation device is normal, but for some reason the communication connection between the air conditioning device and the ventilation device is When an abnormality occurs, information about the air volume of the ventilation device is not transmitted from the ventilation control device side to the air conditioning control device side, and the air conditioning control device cannot know whether there is a shortage of air volume of the ventilation device. For this reason, in the operation of the ventilation device when leakage of the refrigerant is detected, even if the air volume of the ventilation device is insufficient, the air conditioning control device cannot increase the air volume of the air conditioning device, As a result, there is a possibility that the refrigerant leaked from the air-conditioned space cannot be discharged.

  Therefore, here, as described above, even when an abnormality occurs in the communication connection between the air conditioner and the ventilator, the air conditioner controller increases the air volume of the air conditioner.

  As a result, if an abnormality occurs in the communication connection between the air conditioner and the ventilator, the air conditioner control unit will judge whether the air flow of the ventilator is actually insufficient or not. By forcibly increasing the air flow of the device, if the air flow of the ventilator is insufficient, it prevents the leaked refrigerant from accumulating in the air-conditioned space and discharges the leaked refrigerant from the air-conditioned space Therefore, the occurrence of an accident due to leakage of refrigerant from the air conditioner can be reliably suppressed.

  The air conditioning ventilation system according to the third aspect is the air conditioning ventilation system according to the first or second aspect, wherein the ventilation control device is connected with an adapter device that enables communication between the air conditioning device and the ventilation device. The adapter device transmits information related to the air volume of the ventilation device to the air conditioning control device.

  Here, as described above, the air conditioner and the ventilator are communicably connected via the adapter device, so that it is possible to cope with a case where communication cannot be performed by direct connection between the air conditioner control device and the ventilator controller. And the adapter apparatus transmits the information regarding the air volume of a ventilator to an air-conditioning control apparatus.

  As a result, in this case, the air conditioning control device transmits the information related to the air volume of the ventilation device to the air conditioning control device, so that the air conditioning control device can be connected to the ventilation control device. By making it possible to know whether there is a shortage of airflow, and increasing the airflow of the air conditioner when the airflow of the ventilator is insufficient in the operation of the ventilator when refrigerant leakage is detected, the leaked refrigerant Even if it is a ventilator that prevents the air from being stored in the air-conditioned space and the airflow is insufficient, the refrigerant leaking from the air-conditioned space can be discharged, thus ensuring the occurrence of an accident due to the refrigerant leaking from the air-conditioning device. Can be suppressed.

  As described in the above description, according to the present invention, when the air flow of the ventilator is insufficient in the operation of the ventilator when the refrigerant leakage is detected, the air flow of the air conditioner is increased. Because the leaked refrigerant is prevented from accumulating in the air-conditioned space, and even in a ventilator with insufficient airflow, the refrigerant leaked from the air-conditioned space can be discharged. Accidents can be reliably suppressed.

1 is an overall configuration diagram of an air conditioning ventilation system according to an embodiment of the present invention. It is a communication system diagram of an air-conditioning ventilation system. It is an equipment piping system diagram of an air-conditioner. It is an apparatus block diagram of a ventilator. It is a control block diagram (illustration is shown in detail other than the central control device and the adapter device) of the air conditioning ventilation system. It is a control block diagram of an air conditioning ventilation system (a centralized control device and an adapter device are shown in detail). It is a flowchart which shows the connection process of the communication system between each apparatus after field installation. It is a figure which shows the correspondence between the area after driving | operation permission, and each apparatus. It is a flowchart which shows a response | compatibility when the malfunction etc. of a ventilator generate | occur | produce in refrigerant | coolant discharge | emission driving | operation.

  Hereinafter, an embodiment of an air-conditioning ventilation system according to the present invention will be described based on the drawings. In addition, the concrete structure of embodiment of the air-conditioning ventilation system concerning this invention is not restricted to the following embodiment and its modification, It can change in the range which does not deviate from the summary of invention.

(1) Configuration <Overall>
FIG. 1 is an overall configuration diagram of an air-conditioning ventilation system according to an embodiment of the present invention. FIG. 2 is a communication system diagram of the air conditioning ventilation system.

  The air-conditioning ventilation system is a system mainly including an air conditioner 1 capable of cooling and heating an air-conditioned space, and ventilators 6a and 6b that ventilate the air-conditioned space. The air-conditioning ventilation system includes refrigerant leakage detection devices 11a and 11b that detect refrigerant.

  The air conditioner 1 is configured by connecting a plurality of (here, four) indoor units 3a, 3b, 3c, and 3d to the outdoor unit 2, and a refrigerant circuit 1a in which a refrigerant circulates, and an indoor unit 3a, 3b, 3c, 3d, and an air conditioning control device 12 as a control device that controls the operation of the outdoor unit 2. Here, the indoor units 3a and 3b are installed on the ceiling of the area S1 in order to cool and heat the area S1, which is one of the predetermined areas of the air-conditioned space, and the indoor units 3c and 3d are In order to cool and heat the area S2, which is one of the predetermined areas of the air-conditioned space, it is installed on the ceiling of the area S2. The outdoor unit 2 is installed on the rooftop of a building. The refrigerant circuit 1 a is configured by connecting a plurality of indoor units 3 a, 3 b, 3 c, 3 d and the outdoor unit 2 via refrigerant communication tubes 4, 5. In the refrigerant circuit 1a, a refrigerant having a slight flammability such as R32, a flammable refrigerant such as propane, or a toxic refrigerant such as ammonia is enclosed as a refrigerant. The air conditioning control device 12 assigns a plurality of indoor units 3a, 3b, 3c, and 3d to predetermined areas S1 and S2 of the air-conditioned space, and performs operation control of the plurality of indoor units 3a, 3b, 3c, and 3d. The air conditioning control device 12 is configured by connecting a plurality of indoor control devices 130a, 130b, 130c, and 130d, the outdoor control device 120, and the centralized control device 100 via a communication line. Each indoor control device 130a, 130b, 130c, 130d is provided in the corresponding indoor unit 3a, 3b, 3c, 3d, and a remote controller is provided corresponding to each indoor unit 3a, 3b, 3c, 3d. The remote controller is also included in the indoor control devices 130a, 130b, 130c, and 130d. The outdoor control device 120 is provided in the outdoor unit 2. The central control device 100 is provided, for example, in a building (here, area S2) that forms an air-conditioned space.

  There are a plurality of ventilation devices 6a and 6b (here, two), and they are provided corresponding to the areas S1 and S2. Here, the ventilator 6a is installed on the ceiling of the area S1 to ventilate the area S1, and the ventilator 6b is installed on the ceiling of the area S2 to ventilate the area S2. is set up. Each ventilation device 6a, 6b is provided with a ventilation control device 160a, 160b. When a remote control is provided corresponding to each ventilation device 6a, 6b, the remote control is also included in the ventilation control device 160a, 160b. It is. The ventilation control devices 160a and 160b are connected to the indoor control devices 130a, 130b, 130c, and 130d of the air conditioning control device 12 through the adapter devices 70a and 70b and the communication line in order to enable the air conditioning device 1 to be linked. Has been. Here, the adapter devices 70a and 70b are interposed between the indoor units 3a, 3b, 3c, and 3d of the air conditioner 1 and the ventilators 6a and 6b, and between the air conditioner 1 and the ventilators 6a and 6b. It is a device that enables communication. Therefore, here, assuming that the ventilation control devices 160a and 160b cannot communicate by simply connecting them directly to the indoor control devices 130a, 130b, 130c, and 130d of the air conditioning control device 12, the adapter devices 70a and 70b are provided. I have to. However, when the communication between the air conditioner 1 and the ventilators 6a and 6b is possible by the direct connection of the air conditioner controller 160a and 160b to the indoor controllers 130a, 130b, 130c and 130d of the air conditioner controller 12, There is no need to provide adapter devices 70a and 70b.

  There are a plurality (two in this case) of refrigerant leakage detection devices 11a and 11b, and are provided corresponding to the areas S1 and S2. Here, the refrigerant leakage detection device 11a is provided in the area S1 in order to detect whether or not the refrigerant is leaking from the indoor units 3a and 3b in the area S1, and the refrigerant leakage detection device 11b is provided in the indoor unit 3c. 3d is provided in area S2 in order to detect whether or not the refrigerant is leaking in area S2. Each refrigerant leak detection device 11a, 11b is provided with detection control devices 110a, 110b, and in order to inform the air conditioner 1 whether the refrigerant is leaking in the areas S1, S2, via a communication line, The air conditioner controller 12 is connected to the indoor controllers 130a, 130b, 130c, and 130d.

<Air conditioner>
FIG. 3 is an equipment piping system diagram of the air conditioner 1. Here, in FIG. 3, the equipment piping configuration of the outdoor unit 2 and the indoor units 3a, 3b is illustrated in detail, and the illustration of the equipment piping configuration of the indoor units 3c, 3d is omitted.

-Outdoor unit-
As described above, the outdoor unit 2 is connected to the indoor units 3a, 3b, 3c, and 3d via the refrigerant communication tubes 4 and 5, and constitutes a part of the refrigerant circuit 1a.

  The outdoor unit 2 mainly has a compressor 21, a switching mechanism 23, and an outdoor heat exchanger 24.

  The compressor 21 is a mechanism for compressing a refrigerant, and here, a rotary type or scroll type volumetric compression element (not shown) accommodated in a casing (not shown) is also provided in the casing. A hermetic compressor driven by a stored compressor motor 22 is employed.

  The switching mechanism 23 is a four-way switching valve capable of switching between a cooling operation state in which the outdoor heat exchanger 24 functions as a refrigerant radiator and a heating operation state in which the outdoor heat exchanger 24 functions as a refrigerant evaporator. Here, the cooling operation state is a switching state in which the discharge side of the compressor 21 and the gas side of the outdoor heat exchanger 23 are communicated, and the gas refrigerant communication pipe 5 and the suction side of the compressor 21 are communicated ( (See the solid line of the switching mechanism 23 in FIG. 3). The heating operation state is a switching state in which the discharge side of the compressor 21 and the gas refrigerant communication pipe 5 are communicated with each other, and the gas side of the outdoor heat exchanger 23 and the suction side of the compressor 21 are communicated (switching in FIG. 3). (See dashed line for mechanism 23). The switching mechanism 23 is not limited to a four-way switching valve, and is configured to have a function of switching the flow direction of the refrigerant as described above, for example, by combining a plurality of electromagnetic valves. There may be.

  The outdoor heat exchanger 24 is a heat exchanger that functions as a refrigerant radiator or evaporator by exchanging heat between the refrigerant and outdoor air (OA). Outdoor air (OA) that exchanges heat with the refrigerant in the outdoor heat exchanger 24 is supplied to the outdoor heat exchanger 24 by an outdoor fan 25 that is driven by an outdoor fan motor 26.

-Indoor unit-
As described above, the indoor units 3a, 3b, 3c, and 3d are connected to the outdoor unit 2 via the refrigerant communication tubes 4 and 5, and constitute a part of the refrigerant circuit 1a. In the following description, the configuration of the indoor unit 3a will be described, and the configuration of the indoor units 3b, 3c, 3d will be described by replacing the subscript “a” with “b”, “c”, “d”. Omitted.

  The indoor unit 3a mainly has an indoor expansion mechanism 31a and an indoor heat exchanger 32a.

  The indoor expansion mechanism 31a is an electric expansion valve that can change the flow rate of the refrigerant flowing through the indoor heat exchanger 32a by performing opening degree control.

  The indoor heat exchanger 32a is a heat exchanger that functions as an evaporator or a radiator of the refrigerant by exchanging heat between the refrigerant and the indoor air (RA). The indoor air (RA) that exchanges heat with the refrigerant in the indoor heat exchanger 32a is supplied to the indoor heat exchanger 32a by an indoor fan 33a that is driven by an indoor fan motor 34a that can control the rotational speed. ing.

<Ventilation device>
FIG. 4 is a device configuration diagram of the ventilation devices 6a and 6b.

  Here, a ventilator having heat exchangers 62a and 62b is employed as the ventilators 6a and 6b. In the following description, the configuration of the ventilation device 6a will be described, and the description of the configuration of the ventilation device 6b will be omitted by replacing the subscript “a” with “b”.

  The ventilation device 6a mainly uses an intake duct 7 connected to an intake for taking outdoor air (OA) into an air-conditioned space (here, area S1), and uses indoor air (OA) as supply air (SA). The supply air duct 8a connected to the supply air supply port, the take-out duct 9a connected to the take-out port for taking out the room air (RA) from the area S1, and the room air (RA) as exhaust air (EA) It has the apparatus main body 61a connected to the exhaust duct 10 connected to the discharge port for discharging | emitting outside.

  The apparatus main body 61a is provided with a heat exchanger 62a, and two ventilation paths 63a and 64a partitioned from each other are formed so as to cross the heat exchanger 62a. Here, the heat exchanger 62a is a total heat exchanger that simultaneously exchanges sensible heat and latent heat between two air flows (here, indoor air and outdoor air), and straddles the ventilation paths 63a and 64a. It is provided as follows. One ventilation path 63a has one end connected to the intake duct 7 and the other end connected to the air supply duct 8a, and constitutes an air supply path for flowing air from the outdoor toward the area S1. ing. The other ventilation path 64a has one end connected to the take-out duct 9a and the other end connected to the exhaust duct 10, and constitutes an exhaust path for flowing air from the area S1 toward the outside. In addition, the air supply path 63a is provided with an air supply fan 65a driven by an air supply fan motor 66a capable of rotating speed control in order to generate an air flow from the outdoor area toward the area S1, and the exhaust path 64a is provided with an air supply path 65a. Is provided with an exhaust fan 67a driven by an exhaust fan motor 68a capable of rotating speed control in order to generate an air flow from the area S1 to the outside. The air supply fan 65a and the exhaust fan 67a are disposed on the downstream side of the heat exchanger 62a with respect to the air flow.

<Control device>
FIG. 5 is a control block diagram of the air-conditioning ventilation system (details are shown except for the central control device 100 and the adapter devices 70a and 70b), and FIG. 6 is a control block diagram of the air-conditioning ventilation system (the central control device 100 and the adapter device). 70a and 70b are shown in detail). In FIG. 5, the illustration of each part of the indoor control devices 130b, 130c, 130d, the ventilation control device 160b, and the detection control device 110b is omitted.

-Outdoor control device-
The outdoor control device 120 controls the components of the outdoor unit 2 and constitutes a part of the air conditioning control device 12. The outdoor control device 120 mainly includes an outdoor control unit 121, an outdoor communication unit 122, and an outdoor storage unit 123.

  The outdoor control unit 121 is connected to the outdoor communication unit 122 and the outdoor storage unit 123. The outdoor communication unit 122 communicates control data and the like with the indoor control devices 130a, 130b, 130c, and 130d and the central control device 100. The outdoor storage unit 123 stores control data and the like. The outdoor control unit 121 communicates and reads / writes control data and the like via the outdoor communication unit 122 and the outdoor storage unit 123, while the devices 21, 23, and 25 of the compressors and the like provided in the outdoor unit 2 are connected. Perform operation control.

-Indoor control device-
The indoor control devices 130a, 130b, 130c, and 130d control the components of the corresponding indoor units 3a, 3b, 3c, and 3d, respectively, and constitute a part of the air conditioning control device 12. The indoor control devices 130a, 130b, 130c, and 130d mainly include indoor control units 131a, 131b, 131c, and 131d, indoor communication units 132a, 132b, 132c, and 132d, and indoor storage units 133a, 133b, 133c, and 133d, respectively. And have. In the following description, the configuration of the indoor control device 130a will be described. Regarding the configuration of the indoor control devices 130b, 130c, and 130d, the subscript “a” is replaced with “b”, “c”, and “d”. Description is omitted.

  The indoor control unit 131a is connected to the indoor communication unit 132a and the indoor storage unit 133a. The indoor communication unit 132a communicates control data and the like with the ventilation control device 160a, the detection control device 110a, and the centralized control device 100 via the outdoor control device 120, other indoor control devices 130b, 130c, and 130d, and the adapter device 70a. Communicate. The indoor storage unit 133a stores control data and the like. The indoor control unit 131a operates the devices 31a and 33a such as the indoor expansion mechanism provided in the indoor unit 3a while communicating and reading / writing control data and the like via the indoor communication unit 132a and the indoor storage unit 133a. Take control.

-Ventilation control device and adapter device-
The ventilation control devices 160a and 160b control the components of the corresponding ventilation devices 6a and 6b, respectively. The ventilation control devices 160a and 160b mainly have ventilation control units 161a and 161b, ventilation communication units 162a and 162b, ventilation storage units 163a and 163b, and ventilation operation units 164a and 164b, respectively. Further, the adapter devices 70a and 70b issue operation commands and the like to the ventilation control devices 160a and 160b that control the corresponding ventilation devices 6a and 6b, respectively. The adapter devices 70a and 70b mainly have adapter control units 71a and 71b, adapter communication units 72a and 72b, and adapter storage units 73a and 73b, respectively. In the following description, the configurations of the ventilation control device 160a and the adapter device 70a will be described, and the descriptions of the configurations of the ventilation control device 160b and the adapter device 70b will be omitted by replacing the subscript “a” with “b”. .

  The ventilation control unit 161a is connected to the ventilation communication unit 162a, the ventilation storage unit 163a, and the ventilation operation unit 164a. The ventilation communication unit 162a communicates control data and the like with the indoor control devices 130a and 130b and the centralized control device 100 via the adapter device 70a. The ventilation storage unit 163a stores control data and the like. The ventilation operation unit 164a inputs a control command and the like. The ventilation control unit 161a reads / writes and communicates control data and the like via the ventilation communication unit 162a, the ventilation storage unit 163a, and the ventilation operation unit 164a, and a device 65a such as a fan provided in the ventilation device 6a, The operation control 67a is performed.

  The adapter control unit 71a is connected to the adapter communication unit 72a and the adapter storage unit 73a. The adapter communication unit 72a communicates control data and the like with the indoor control devices 130a and 130b and the centralized control device 100 and with the ventilation communication unit 162a. The adapter storage unit 73a stores control data and the like. And the adapter control part 71a gives a driving | operation command etc. to the ventilation control apparatus 160a which controls the ventilation apparatus 6a, performing reading / writing and communication of control data etc. via the adapter communication part 72a and the adapter memory | storage part 73a. Thus, here, the adapter device 70a that can communicate with both the ventilation control device 160a and the air conditioning device 1 communicates with the air conditioning device 1 instead of the ventilation control device 160a.

-Detection control device-
The detection control devices 110a and 110b respectively control the constituent devices of the corresponding refrigerant leakage detection devices 11a and 11b, that is, perform the refrigerant detection operation by the refrigerant detection units 114a and 114b. The detection control devices 110a and 110b mainly include detection control units 111a and 111b, detection communication units 112a and 112b, and detection storage units 113a and 113b, respectively. In the following description, the configuration of the detection control device 110a will be described, and the description of the configuration of the detection control device 110b will be omitted by replacing the subscript “a” with “b”.

  The detection control unit 111a is connected to the detection communication unit 112a and the detection storage unit 113a. The detection communication unit 112a communicates control data and the like with the indoor control devices 130a and 130b and the central control device 100. The detection storage unit 113a stores control data and the like. And the detection control part 111a performs detection operation | movement by the refrigerant | coolant detection part 114a etc. of the refrigerant | coolant leak detection apparatuses 11a and 11b, performing reading / writing and communication of control data etc. via the detection communication part 112a and the detection memory | storage part 113a. .

-Central control device-
The centralized control device 100 receives an input of an operation command, etc., issues a control command to the indoor control devices 130a, 130b, 130c, 130d, etc. of the plurality of indoor units 3a, 3b, 3c, 3d, etc., and performs an operation display, etc. And constitutes a part of the air conditioning control device 12. The central control apparatus 100 mainly includes a central control unit 101, a central communication unit 102, a central storage unit 103, a central operation unit 104, and a central display unit 105.

  The central control unit 101 is connected to the central communication unit 102, the central storage unit 103, the central operation unit 104, and the central display unit 105. The centralized communication unit 102 communicates control data and the like with the indoor control devices 130a, 130b, 130c, and 130d, the adapter devices 70a and 70b (ventilation control devices 160a and 160b), and the detection control devices 110a and 110b. The central storage unit 103 stores control data and the like. The centralized operation unit 104 inputs a control command and the like. The central display unit 105 performs operation display and the like. The central control unit 101 receives an input of a control command or the like via the central operation unit 104, reads and writes control data and the like in the central storage unit 103, and performs operation display and the like on the central display unit 105. Via the communication unit 102, the outdoor control device 120, the indoor control devices 130a, 130b, 130c, and 130d, the adapter devices 70a and 70b (ventilation control devices 160a and 160b), the ventilation control devices 160a and 160b, and the detection control devices 110a and 110b. A control command or the like is given. The central control unit serves as a control command to the outdoor control device 120, the indoor control devices 130a, 130b, 130c, and 130d, the adapter devices 70a and 70b (ventilation control devices 160a and 160b), and the detection control devices 110a and 110b. 101 is provided with a concentration command unit 106.

  The central control unit 101 is provided with a unit specifying unit 107 and an area registration unit 108.

  The unit specifying unit 107 performs a unit specifying process for assigning unit numbers for distinguishing each of the indoor units 3a, 3b, 3c, and 3d, the ventilation devices 6a and 6b, and the refrigerant leak detection devices 11a and 11b. Part. Specifically, the unit specifying unit 107 performs indoor control via the centralized communication unit 102 after the on-site installation of the air conditioner 1, the ventilators 6a and 6b, and the refrigerant leakage detection devices 11a and 11b and before the operation. The devices 130a, 130b, 130c, and 130d, the adapter devices 70a and 70b (ventilation control devices 160a and 160b), and the detection control devices 110a and 110b communicate with each other, and the type of device that is controlled by each control device (here, air conditioning) The indoor unit of the device, the ventilation device, or the refrigerant leakage detection device), and the unit number is assigned to the indoor control device 130a, 130b, 130c, 130d or the adapter device 70a, 70b (ventilation control device 160a, 160b). ) To the detection control devices 110a and 110b. Here, the process of assigning the unit number may be automatically given by the unit specifying unit 107 or given by the unit specifying unit 107 through an input via the centralized operation unit 104. It may be. Moreover, when a remote controller is provided corresponding to each indoor unit 3a, 3b, 3c, 3d, the unit number may be manually assigned from such a remote controller. The unit number assigned by the unit specifying unit 107 or the like is stored in the central storage unit 103 together with the model code indicating the type of each device. The unit numbers assigned to the respective devices by the unit specifying unit 107 and the like are the indoor storage units 133a, 133b, 133c, and 133d, the adapter storage units 73a and 73b (ventilation storage units 163a and 163b), and the detection storage units 113a and 113b. Is also remembered.

  The area registration unit 108 allocates the indoor units 3a, 3b, 3c, and 3d to area identification frames (here, G1 and G2) corresponding to predetermined areas (here, areas S1 and S2) of the air-conditioned space, Area registration processing for allocating ventilation devices 6a and 6b (here, adapter devices 70a and 70b) for ventilating the air-conditioned space to the area identification frames G1 and G2 to which the indoor units 3a, 3b, 3c, and 3d are allocated is performed. It is a control part. In addition, here, the area registration unit 108 detects whether or not the refrigerant leaks in each of the area identification frames G1 and G2 to which the indoor units 3a, 3b, 3c, and 3d are allocated in the area registration process. The process of allocating the devices 11a and 11b is also performed. Specifically, the area registration unit 108 first creates area identification frames (here, G1, G2) corresponding to predetermined areas (here, areas S1, S2) of the air-conditioned space. Here, the process of creating the area identification frame is performed by the area registration unit 108 through input via the centralized operation unit 104. Next, the area registration unit 108 includes indoor units 3a, 3b, 3c, and 3d and ventilation devices 6a and 6b (here, adapter devices 70a and 70b) that are assigned unit numbers to the created area identification frames. Then, the process of allocating the refrigerant leakage detection devices 11a and 11b is performed. Here, the process of assigning each device to the area identification frame is performed through the area registration unit 108 by input via the centralized operation unit 104, and the correspondence between each device and the area identification frame obtained by the area registration unit 108 is as follows. The data is stored in the central storage unit 103 as data associated with the unit number and the model code. The area registration unit 108 communicates with the indoor control devices 130a, 130b, 130c, and 130d, the adapter devices 70a and 70b (ventilation control devices 160a and 160b), and the detection control devices 110a and 110b via the centralized communication unit 102. Then, the allocated area identification frames are given to the indoor control devices 130a, 130b, 130c, and 130d, the adapter devices 70a and 70b (ventilation control devices 160a and 160b), and the detection control devices 110a and 110b. Then, the area identification frame allocated by the area registration unit 108 includes indoor storage units 133a, 133b, 133c, and 133d, adapter storage units 73a and 73b (ventilation storage units 163a and 163b), and detection as data associated with the unit number. It is stored in the storage units 113a and 113b. Further, the indoor storage units 133a, 133b, 133c, and 133d have unit numbers and ventilation units 6a and 6b (here, adapter devices 70a and 70b) and refrigerant leak detection devices 11a and 11b allocated to the same area identification frame. The model code is also stored. And by this area registration process, ventilation apparatus 6a, 6b (here adapter apparatus 70a, 70b) among the several area identification frames (here G1, G2) to which indoor unit 3a, 3b, 3c, 3d was allocated. ) Is not allocated, that is, a state where the air conditioner 1 and the ventilators 6a and 6b are communicatively connected via the adapter devices 70a and 70b is obtained.

(2) Operation In the air conditioning ventilation system having the air conditioner 1, the ventilators 6a and 6b, and the refrigerant leakage detection devices 11a and 11b, the following operation is performed.

-Air conditioning operation-
First, the cooling operation will be described. When the air conditioning control device 12 (centralized control device 100) instructs the air conditioning device 1 to perform the cooling operation, the switching mechanism 23 is switched to the cooling operation state (the state indicated by the solid line of the switching mechanism 23 in FIG. 3). Then, the compressor 21 and the outdoor fan 25 are activated. Further, when the area S1 is designated as the air-conditioned space for performing the cooling operation, the indoor fans 33a and 33b are activated, and when the area S2 is designated as the air-conditioned space for performing the cooling operation, the indoor fan 33c. , 33d are activated, and the indoor fans 33a, 33b, 33c, and 33d are activated when both the areas S1 and S2 are designated as the air-conditioned space for performing the cooling operation.

  Then, the low-pressure gas refrigerant in the refrigerant circuit 1 a is sent to the outdoor heat exchanger 24 via the switching mechanism 23. The high-pressure gas refrigerant sent to the outdoor heat exchanger 24 is cooled by exchanging heat with outdoor air (OA) supplied by the outdoor fan 25 in the outdoor heat exchanger 24 that functions as a refrigerant radiator. This condenses into a high-pressure liquid refrigerant. This high-pressure liquid refrigerant is sent from the outdoor unit 2 to the indoor units 3a and 3b and the indoor units 3c and 3d to cool the areas S1 and S2 via the liquid refrigerant communication tube 4.

  The high-pressure liquid refrigerant sent to the indoor units 3a and 3b and the indoor units 3c and 3d is depressurized by the indoor expansion mechanisms 31a and 31b and the indoor expansion mechanisms 31c and 31d to become a low-pressure gas-liquid two-phase refrigerant. . The low-pressure gas-liquid two-phase refrigerant is sent to the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d. The low-pressure gas-liquid two-phase refrigerant sent to the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d is the indoor heat exchangers 32a and 32b and the indoor heat exchanger 32c that function as a refrigerant evaporator. 32d, the indoor fans 33a and 33b and the indoor fans 33c and 33d evaporate by heating and exchanging heat with the indoor air (RA) supplied from the areas S1 and S2, and a low-pressure gas refrigerant. Become. The low-pressure gas refrigerant is sent from the indoor units 3 a and 3 b and the indoor units 3 c and 3 d to the outdoor unit 2 via the gas refrigerant communication pipe 5. On the other hand, indoor air (RA) cooled in the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d is sent to the area S1 and the area S2, thereby cooling the area S1 and the area S2. .

  The low-pressure gas refrigerant sent to the outdoor unit 2 is again sucked into the compressor 21 via the switching mechanism 23.

  Next, the heating operation will be described. When the air-conditioning control device 12 (centralized control device 100) instructs the air-conditioning device 1 to perform the heating operation, the switching mechanism 23 is switched to the heating operation state (the state indicated by the broken line of the switching mechanism 23 in FIG. 3). Then, the compressor 21 and the outdoor fan 25 are activated. When the area S1 is designated as the air-conditioned space for performing the heating operation, the indoor fans 33a and 33b are activated, and when the area S2 is designated as the air-conditioned space for performing the heating operation, the indoor fan 33c. , 33d are activated, and the indoor fans 33a, 33b, 33c, and 33d are activated when both areas S1 and S2 are designated as air-conditioned spaces for heating operation.

  Then, the low-pressure gas refrigerant in the refrigerant circuit 1a passes from the outdoor unit 2 to the indoor units 3a, 3b and indoors in order to heat the areas S1 and S2 via the switching mechanism 23 and the gas refrigerant communication pipe 5. Sent to units 3c and 3d.

  The high-pressure gas refrigerant sent to the indoor units 3a and 3b and the indoor units 3c and 3d is sent to the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d. The high-pressure gas refrigerant sent to the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d is indoors in the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d that function as a refrigerant radiator. The fans 33a and 33b and the indoor fans 33c and 33d are condensed by cooling by exchanging heat with indoor air (RA) supplied from the areas S1 and S2 to become high-pressure liquid refrigerant. The high-pressure liquid refrigerant is decompressed by the indoor expansion mechanisms 31a and 31b and the indoor expansion mechanisms 31c and 31d. The refrigerant decompressed by the indoor expansion mechanisms 31a and 31b and the indoor expansion mechanisms 31c and 31d is sent from the indoor units 3a and 3b and the indoor units 3c and 3d to the outdoor unit 2 via the liquid refrigerant communication tube 4. On the other hand, the indoor air (RA) heated in the indoor heat exchangers 32a and 32b and the indoor heat exchangers 32c and 32d is sent to the areas S1 and S2, thereby heating the areas S1 and S2. .

  The refrigerant sent to the outdoor unit 2 is sent to the outdoor heat exchanger 24. The refrigerant sent to the outdoor heat exchanger 24 evaporates by being heated by exchanging heat with outdoor air (OA) supplied by the outdoor fan 25 in the outdoor heat exchanger 24 functioning as a refrigerant evaporator. Thus, a low-pressure gas refrigerant is obtained. This low-pressure gas refrigerant is again sucked into the compressor 21 via the switching mechanism 23.

−Ventilation operation−
First, the ventilation operation in area S1 will be described. When a ventilation operation instruction is given from the ventilation control device 160a to the ventilation device 6a, the air supply fan 65a and the exhaust fan 67a are activated. Here, the instruction of the ventilation operation includes a case of input from the ventilation operation unit 164a of the ventilation control device 160a and a case of request from the air conditioning control device 12 via the adapter device 70a.

  Then, outdoor air (OA) that flows into the apparatus main body 61a from the outside through the intake duct 7 and indoor air (RA) that flows into the apparatus main body 61a from the area S1 through the extraction duct 9a are heated in the heat exchanger 62a. Exchange. And the outdoor air (OA) which exchanged heat in the heat exchanger 62a is supplied as supply air (SA) from the apparatus main body 61a to the area S1 through the air supply duct 8a, and heat exchange was performed in the heat exchanger 62a. Indoor air (RA) is exhausted as exhaust air (EA) from the apparatus main body 61 a to the outside through the exhaust duct 10.

  Next, the ventilation operation of area S2 will be described. When a ventilation operation instruction is given from the ventilation control device 160b to the ventilation device 6b, the air supply fan 65b and the exhaust fan 67b are activated. Here, the instruction of the ventilation operation includes a case of input from the ventilation operation unit 164b of the ventilation control device 160b and a case of request from the air conditioning control device 12 via the adapter device 70b.

  Then, the outdoor air (OA) that flows into the apparatus main body 61b from the outside through the intake duct 7 and the indoor air (RA) that flows into the apparatus main body 61b from the area S2 through the extraction duct 9b are heated in the heat exchanger 62b. Exchange. The outdoor air (OA) that has undergone heat exchange in the heat exchanger 62b is supplied as supply air (SA) from the apparatus main body 61b to the area S2 through the air supply duct 8b, and heat exchange is performed in the heat exchanger 62b. The room air (RA) is discharged from the apparatus main body 61b to the outside as exhaust air (EA) through the exhaust duct 10.

-Refrigerant discharge operation-
Here, leakage of the refrigerant from the air conditioner 1 causes an oxygen deficiency accident, an ignition accident (when the refrigerant is slightly flammable or flammable), and an poisoning accident (when the refrigerant is toxic) in the areas S1 and S2. In order to prevent this, the refrigerant discharge operation can be performed. That is, when the refrigerant leaks from the air conditioner 1 and the refrigerant leak detection device 11a or the refrigerant leak detection device 11b detects the refrigerant, the indoor units 3a, 3b and the refrigerant responsible for the air conditioning in the area S1 where the refrigerant is detected are detected. It is determined that the refrigerant is leaking from the indoor units 3c and 3d that are in charge of air conditioning in the area S2, and the ventilator 6a in the area S1 and the ventilator 6b in the area S2 in which the refrigerant is detected are forcibly operated. Thus, the refrigerant is discharged from the area S1 where the refrigerant is detected and the area S2 where the refrigerant is detected.

  First, the case where the refrigerant leakage detection device 11a in the area S1 detects the refrigerant will be described. When the refrigerant leak detection device 11a responsible for refrigerant detection in the area S1 detects the refrigerant, the air conditioning control device 12 (here, the central control device 100) that has received the signal via the indoor control devices 130a and 130b receives the signal from the area S1. The indoor control devices 130a and 130b of the indoor units 3a and 3b responsible for the air conditioning and the ventilation control device 160a of the ventilation device 6a responsible for the ventilation of the area S1 are instructed to perform the refrigerant discharge operation. Here, the instruction | indication of the refrigerant | coolant discharge operation to the ventilation control apparatus 160a is performed from the indoor control apparatuses 130a and 130b. Here, the instruction for the refrigerant discharge operation to the ventilation control device 160a is performed through the adapter device 70a that has received the instruction for the refrigerant discharge operation from the indoor control devices 130a and 130b.

  Then, the indoor control devices 130a and 130b close the indoor expansion mechanisms 31a and 31b to stop the indoor fans 33a and 33b, and perform an air conditioning operation (cooling operation or heating operation) on the outdoor control device 120 of the outdoor unit 2. Instruct to stop. The outdoor control device 120 stops the compressor 21 and the outdoor fan 25, and thereby the air conditioner 1 stops. Further, the ventilation control device 160a starts the ventilation operation by starting the air supply fan 65a and the exhaust fan 67a when the ventilation operation is not performed, and performs the ventilation operation when the ventilation operation is performed. By continuing, the refrigerant is discharged from the area S1. Here, as the ventilator 6a, an apparatus having an air volume performance that can prevent the leaked refrigerant from accumulating in the air-conditioned space (here, the area S1) is installed, and the refrigerant is discharged. In operation, the air supply fan 65a and the exhaust fan 67a are set to the maximum air volume (maximum rotation speed).

  Next, the case where the refrigerant leakage detection device 11b in the area S2 detects the refrigerant will be described. When the refrigerant leak detection device 11b responsible for detecting the refrigerant in the area S2 detects the refrigerant, the air conditioning control device 12 (here, the central control device 100) that has received the signal via the indoor control devices 130c and 130d, the area S2 The indoor control devices 130b and 130d of the indoor units 3c and 3d responsible for the air conditioning and the ventilation control device 160b of the ventilation device 6b responsible for the ventilation of the area S2 are instructed to perform the refrigerant discharge operation. Here, the instruction | indication of the refrigerant | coolant discharge operation to the ventilation control apparatus 160b is performed from the indoor control apparatuses 130c and 130d. Here, the instruction for the refrigerant discharge operation to the ventilation control device 160b is performed through the adapter device 70b that has received the instruction for the refrigerant discharge operation from the indoor control devices 130c and 130d.

  Then, the indoor control devices 130c and 130d close the indoor expansion mechanisms 31c and 31d to stop the indoor fans 33c and 33d, and perform an air conditioning operation (cooling operation or heating operation) on the outdoor control device 120 of the outdoor unit 2. Instruct to stop. The outdoor control device 120 stops the compressor 21 and the outdoor fan 25, and thereby the air conditioner 1 stops. Further, the ventilation control device 160b starts the ventilation operation by starting the air supply fan 65b and the exhaust fan 67b when the ventilation operation is not performed, and performs the ventilation operation when the ventilation operation is performed. By continuing, the refrigerant is discharged from the area S2. Here, as the ventilator 6b, an apparatus having an air volume performance that can prevent the leaked refrigerant from accumulating in the air-conditioned space (here, the area S2) is installed, and the refrigerant is discharged. In operation, the air supply fan 65b and the exhaust fan 67b are set to the maximum air volume (maximum rotation speed).

(3) Connection of communication system between air conditioner and ventilator after on-site installation The operation of interlocking the indoor multi-type air conditioner 1 and the ventilators 6a and 6b as in the refrigerant discharge operation is performed by both devices. This is possible by connecting the communication system between 1, 6a and 6b. In other words, when the communication system is not connected between the two devices 1, 6a, 6b, the devices 1, 6a, 6b can be operated independently without being interlocked with each other (ie, the air-conditioning operation). And ventilation operation can be operated independently). And considering that the indoor multi-type air conditioner 1 and the ventilators 6a and 6b are independently selected and installed, even if the configuration for performing the refrigerant discharge operation is employed as described above, There is a possibility that a situation may occur in which the connection of the communication system between the devices 1, 6a and 6b is not reliably performed. For this reason, in the configuration in which the indoor multi-type air conditioner 1 and the ventilators 6a and 6b are installed independently, measures such as operating the ventilators 6a and 6b when the refrigerant leaks are not established. Therefore, there is a possibility that the operation of the air conditioner 1 may be performed, and there is a problem that the possibility of an accident due to leakage of the refrigerant from the air conditioner 1 cannot be excluded.

  Therefore, here, as will be described below, the air conditioning control device 12 includes an indoor unit in an area identification frame (here, G1, G2) corresponding to each area (here, areas S1, S2) of the air-conditioned space. 3a, 3b, 3c, and 3d, and area registration processing for allocating ventilation devices 6a and 6b that ventilate the air-conditioned space to the area identification frames G1 and G2 to which the indoor units 3a, 3b, 3c, and 3d are allocated. Configured to do. Moreover, the air-conditioning control device 1 has an area identification frame in which the ventilation devices 6a and 6b are not allocated among the area identification frames G1 and G2 to which the indoor units 3a, 3b, 3c, and 3d are allocated, that is, The air conditioner 1 cannot be operated until the air conditioner 1 and the ventilators 6a and 6b are in communication connection.

  Hereinafter, the connection of the communication system between the air conditioner 1 and the ventilators 6a and 6b after such local installation will be described with reference to FIGS. Here, FIG. 7 is a flowchart showing connection processing of the communication system between the devices 1, 11a, 11b, 6a, and 6b after installation on the site. FIG. 8 is a diagram illustrating a correspondence relationship between the area after operation permission and each device.

-Unit identification processing-
First, in step ST1, the air conditioning control device 12 mutually connects the adapter units 70a and 70b and the refrigerant leak detection devices 11a and 11b corresponding to the indoor units 3a, 3b, 3c, and 3d and the ventilation devices 6a and 6b. A unit specifying process for assigning a unit number to be distinguished is performed. Here, the unit numbers “00” to “07” are assigned to the indoor units 3a, 3b, 3c, 3d, the ventilators 6a, 6b (adapter devices 70a, 70b), and the refrigerant leak detection devices 11a, 11b. Here, the unit specifying process is mainly performed by the unit specifying unit 107 of the centralized control device 100 or the like. The unit number assigned is a model code indicating the type of the device (here, “U1” indicating the indoor units 3a, 3b, 3c, and 3d of the air conditioner 1, “U2” indicating the ventilation devices 6a and 6b, All of them are stored in the central storage unit 103 of the central control device 100 together with “U3” indicating the refrigerant leak detection devices 11a and 11b. In addition, the storage devices 133a, 133b, and 133c of the control devices 130a, 130b, 130c, 130d, 160a, and 160b (70a, 70b), 110a, and 110c of the devices 3a, 3b, 3c, 3d, 6a, 6b, 11a, and 11b, respectively. The corresponding unit numbers are also stored in 133d, 163a, 163b (73a, 73b), 113a, 113b.

-Area registration process-
Next, in step ST2, the air conditioning control device 12 adds the indoor units 3a, 3b, and the indoor units 3a, 3b, to the area identification frames (G1, G2 here) corresponding to the predetermined areas (here, areas S1, S2) of the air-conditioned space. Areas for allocating ventilation devices 6a and 6b (adapter devices 70a and 70b) for ventilating the air-conditioned space to the area identification frames G1 and G2 to which indoor units 3a, 3b, 3c and 3d are allocated Let the registration process occur. Here, in the area registration process, not only the ventilation devices 6a and 6b (adapter devices 70a and 70b) but also the refrigerant leakage detection devices 11a and 11b that detect the leakage of the refrigerant are allocated to the area identification frames G1 and G2. . Here, the indoor units 3a and 3b, the ventilator 6a (adapter device 70a), and the refrigerant leakage detection device 11a are allocated to the area identification frame of “G1” corresponding to the area S1, and “G2” corresponding to the area S2 is assigned. Indoor units 3c and 3d, ventilation device 6b (adapter device 70b), and refrigerant leakage detection device 11b are allocated to the area identification frame. Here, the area registration process is mainly performed by the area registration unit 108 of the centralized control device 100. Then, the correspondence relationship between each device and the area identification frame obtained by the area registration unit 108 is stored in the centralized storage unit 103 as data associated with the unit number and the model code (see FIG. 8). In addition, the storage devices 133a, 133b, and 133c of the control devices 130a, 130b, 130c, 130d, 160a, and 160b (70a, 70b), 110a, and 110c of the devices 3a, 3b, 3c, 3d, 6a, 6b, 11a, and 11b, respectively. In each of 133d, 163a, 163b (73a, 73b), 113a, and 113b, the area identification frames allocated by the area registration unit 108 are also stored. Further, in the indoor storage units 133a, 133b, 133c, and 133d, unit numbers and model codes of the ventilation devices 6a and 6b and the refrigerant leakage detection devices 11a and 11b allocated to the same area identification frame are also stored. Accordingly, the indoor units 3a and 3b, the ventilation device 6a, and the refrigerant leakage detection device 11a are allocated to the area identification frame G1 corresponding to the area S1 of the air-conditioned space, and the area identification frame corresponding to the area S2 of the air-conditioned space The indoor units 3c and 3d, the ventilation device 6b, and the refrigerant leakage detection device 11b are allocated to G2, and the devices 1, 6a, 6b, 11a, and 11b can be linked through the air conditioning control device 12.

-Judgment of allocation completion of ventilation devices, operation permission-
Next, in step ST3, the air-conditioning control device 12 provides ventilation devices 6a, 6b and refrigerant to all the areas (here, S1, S2) where the indoor units 3a, 3b, 3c, 3d of the air-conditioning device 1 are installed. It is determined whether or not the allocation of the leak detection devices 11a and 11b has been completed. If the allocation has been completed, in step ST4, the operation of the air conditioner 1 is permitted, and a series of the respective devices 1, 6a, and 6b. , 11a, 11b is terminated.

  Thus, here, when installing the indoor multi-type air conditioner 1, a plurality (here, four) of indoor units 3a, 3b, 3c, and 3d are allocated to the areas S1 and S2 of the air-conditioned space. In addition, by establishing a state in which the ventilation devices 6a and 6b and the refrigerant leakage detection devices 11a and 11b are input to the air conditioning control device 12 corresponding to the areas S1 and S2, the devices 1 and 6a are installed at the installation site. , 6b, 11a, and 11b are reliably connected.

  For this reason, here, it is possible to prevent the operation of the air conditioner 1 until the state where the air conditioner 1 and the ventilators 6a and 6b are connected to each other by communication is established. Thereby, here, before the ventilation devices 6a and 6b can be operated according to a command from the air conditioner 1, an accident (ignition accident, poisoning accident, etc.) due to leakage of refrigerant from the air conditioner 1 occurs. Measures can be taken.

(4) Response in case of malfunction of ventilator in refrigerant discharge operation As described above, here, connection processing of the communication system between the air conditioner 1 and the ventilators 6a and 6b is performed after installation on site. Thus, the air conditioner 1 and the ventilators 6a and 6b are connected in communication, and when the refrigerant leaks from the air conditioner 1, the air conditioner controller 12 and the ventilator controllers 160a and 160b through the adapter devices 70a and 70b are connected. By operating the ventilators 6a and 6b according to the command (refrigerant discharge operation), the refrigerant leaked from the air-conditioned space (here, areas S1 and S2) can be discharged.

  However, in such a configuration, when the air flow is insufficient due to the malfunction of the ventilators 6a and 6b, the leaked refrigerant easily accumulates in the areas S1 and S2, and the refrigerant is not sufficiently discharged from the areas S1 and S2. End up.

  Therefore, here, as described below, in the event of a shortage of air flow in the ventilators 6a and 6b in the refrigerant discharge operation (operation of the ventilators 6a and 6b when refrigerant leakage is detected), air conditioning The control device 12 increases the air volume of the air conditioner 1, here, the air volumes of the indoor fans 33a, 33b, 33c, and 33d for supplying indoor air (RA) to the areas S1 and S2.

  Hereinafter, a response when the malfunction of the ventilators 6a and 6b occurs in such a refrigerant discharge operation will be described with reference to FIG. Here, FIG. 9 is a flowchart showing a response when a malfunction or the like of the ventilators 6a and 6b occurs in the refrigerant discharge operation.

  First, when the refrigerant discharge operation, that is, the refrigerant leakage is detected in the areas S1 and S2 and the operation of the ventilators 6a and 6b is started, the communication between the air conditioner 1 and the ventilators 6a and 6b is normally performed. In step ST11, the air conditioning control device 12 and the ventilation control devices 160a and 160b (adapter devices 70a and 70b) determine whether the ventilation devices 6a and 6b have an insufficient air volume. Here, if there is no shortage of airflow in the ventilators 6a, 6b, the airflow of the fans 65a, 65b, 67a, 67b in the ventilators 6a, 6b is the same as the adapter devices 70a, 70b at the start of the refrigerant discharge operation. For example, the rotational speeds and currents of the fan motors 66a, 66b, 68a, 68b of the ventilation devices 6a, 6b are operated with the air volume as commanded from the air conditioning control device 12 to the ventilation control devices 160a, 160b. The value becomes a value near the predetermined value. However, if there is a shortage of airflow in the ventilators 6a and 6b, the airflow of the fans 65a, 65b, 67a and 67b in the ventilators 6a and 6b is determined by the adapter devices 70a and 70b at the start of the refrigerant discharge operation. For example, the rotational speeds and current values of the fan motors 66a, 66b, 68a, 68b of the ventilation devices 6a, 6b are not operated with the air volume as commanded from the air conditioning control device 12 to the ventilation control devices 160a, 160b. Becomes a value significantly lower than the predetermined value. For this reason, based on the information regarding the air volume of the ventilators 6a and 6b, it is determined whether or not the air volume of the ventilators 6a and 6b is insufficient. In addition, when the air-conditioning control device 12 determines whether the ventilation devices 6a and 6b have an insufficient air volume, the rotation speed and current value of the ventilation devices 6a and 6b are determined from the ventilation control devices 160a and 160b side. As a result, the air conditioning control device 12 determines whether or not the ventilation devices 6a and 6b are short of air volume. In addition, when the ventilation control devices 160a and 160b (adapter devices 70a and 70b) determine whether the ventilation devices 6a and 6b have an insufficient air volume, ventilation is performed based on the rotational speeds and current values of the ventilation devices 6a and 6b. The control devices 160a and 160b (adapter devices 70a and 70b) determine whether or not the ventilation devices 6a and 6b have an insufficient air volume, and the determination result is information on the air flow from the ventilation control devices 160a and 160b to the air conditioning control device 12. Will be sent as.

  And in step ST11, when the air volume shortage of ventilator 6a, 6b has generate | occur | produced, it transfers to step ST12. In step ST12, the air conditioning controller 12 increases the air volume of the air conditioner 1, here, the air volumes of the indoor fans 33a, 33b, 33c, and 33d for supplying the indoor air (RA) to the areas S1 and S2. Specifically, with the start of the refrigerant discharge operation, the operation of the indoor fans 33a, 33b, 33c, and 33d once stopped is resumed, and the air flow of the indoor fans 33a, 33b, 33c, and 33d is, for example, up to the maximum air flow. Increase.

  As described above, when the air flow of the air conditioner 1 is insufficient in the refrigerant discharge operation (operation of the ventilators 6a and 6b when leakage of the refrigerant is detected), Here, by increasing the air volume of the indoor fans 33a, 33b, 33c, and 33d, the leaked refrigerant is prevented from accumulating in the air-conditioned space (here, the areas S1 and S2), and the ventilation is insufficient. Even in the devices 6a and 6b, since the refrigerant leaked from the areas S1 and S2 can be discharged, the occurrence of an accident due to the leakage of the refrigerant from the air conditioner 1 can be reliably suppressed.

  In step ST11, in order for the air conditioning control device 12 to know whether the ventilation devices 6a and 6b have an insufficient air volume, the communication connection between the air conditioning device 1 and the ventilation devices 6a and 6b is normal as described above. However, if an abnormality occurs in the communication connection between the air conditioner 1 and the ventilators 6a and 6b for some reason, information on the air volume of the ventilators 6a and 6b is obtained from the ventilation control devices 160a and 160b side. The air conditioning control device 12 cannot know whether the ventilation devices 6a and 6b have an insufficient air volume. For this reason, in the operation of the ventilators 6a and 6b when refrigerant leakage is detected, even if the airflow of the ventilators 6a and 6b is insufficient, the air conditioner control device 12 has the airflow of the air conditioner 1. As a result, the refrigerant leaking from the air-conditioned space (here, areas S1 and S2) may not be discharged.

  Therefore, here, prior to determining whether there is a shortage of air volume in step ST11, in step ST13, it is determined whether there is an abnormality in communication connection between the air conditioner 1 and the ventilators 6a, 6b, and the air conditioner 1 and the ventilator. Even when an abnormality occurs in the communication connection with 6a, 6b, the processing in step ST12, that is, the air volume of the air conditioner 1, here, as in the case where the air volume shortage of the ventilators 6a, 6b occurs in step ST11. The air volume of the indoor fans 33a, 33b, 33c, 33d for supplying the indoor air (RA) to the areas S1, S2 is increased. Here, if the communication connection between the air conditioner 1 and the ventilation device 6a is normal, the communication connection between the indoor control devices 130a and 130b constituting the air conditioning control device 12 and the adapter device 70a connected to the ventilation control device 160a is established. Since it should have been established, the indoor control devices 130a and 130b determine whether or not communication from the adapter device 70a is normally performed, and the adapter device 70a performs communication from the indoor control devices 130a and 130b. Determine if it is done normally. If the communication connection between the air conditioner 1 and the ventilation device 6b is normal, the communication connection between the indoor control devices 130c and 130d constituting the air conditioning control device 12 and the adapter device 70b connected to the ventilation control device 160b is established. Therefore, in the indoor control devices 130c and 130d, it is determined whether or not communication from the adapter device 70b is normally performed. In the adapter device 70b, communication from the indoor control devices 130c and 130d is normal. Determine if it is done.

  Thus, here, when an abnormality occurs in the communication connection between the air conditioner 1 and the ventilators 6a and 6b, an air flow shortage of the ventilators 6a and 6b actually occurs as determined by the air conditioning controller 12 side. Regardless of whether the airflow of the air conditioner 1 (here, the airflow of the indoor fans 33a, 33b, 33c, 33d) is forcibly increased, the airflow of the ventilators 6a, 6b is insufficient. In this case, the leaked refrigerant can be prevented from accumulating in the air-conditioned space (here, areas S1 and S2), and the refrigerant leaked from areas S1 and S2 can be discharged. The occurrence of accidents due to leakage can be reliably suppressed.

  In addition, as described above, the air conditioner 1 cannot be operated until the state where the air conditioner 1 and the ventilators 6a and 6b are connected to each other after communication is established. Before the ventilation device 6a, 6b can be operated by a command from the device 1, measures are taken against an accident caused by leakage of refrigerant from the air conditioner 1. Thereby, here, the occurrence of an accident due to the leakage of the refrigerant from the air conditioner 1 can be surely suppressed before and after the air conditioner 1 and the ventilators 6a and 6b are in communication connection.

  In addition, here, when the air conditioner 1 and the ventilators 6a and 6b are connected by communication via the adapter devices 70a and 70b, the direct connection between the air conditioner control device 12 and the ventilation controllers 160a and 160b cannot be used. It can be adapted to. Then, the adapter devices 70a and 70b are configured to transmit information related to the air volume of the ventilators 6a and 6b (the rotational speed, the current value, and the determination result of insufficient air volume) to the air conditioning controller 12. Thereby, here, by transmitting information related to the air volume of the ventilation devices 6a and 6b to the air-conditioning control device 12 while corresponding to the case where communication is not possible by direct connection between the air-conditioning control device 12 and the ventilation control devices 160a and 160b. The air conditioner control device 12 can know whether the ventilation devices 6a and 6b have an insufficient air volume, and the ventilation devices 6a and 6b have an insufficient air volume in the operation of the ventilation devices 6a and 6b when a refrigerant leak is detected. When the airflow is generated, by increasing the air volume of the air conditioner 1 (here, the air volume of the indoor fans 33a, 33b, 33c, 33d), the leaked refrigerant accumulates in the air-conditioned space (here, areas S1, S2). Since the refrigerant leaked from the areas S1 and S2 can be discharged even in the ventilators 6a and 6b in which the air volume is insufficient, the air conditioner Accidents by the refrigerant leakage from can be reliably suppressed.

(5) Modification <A>
In the above embodiment, the indoor unit 3a, 3b, 3c, 3d is a ceiling-mounted type, but is not limited to this, for example, wall installation, wall installation, floor installation, under floor Other types of indoor units such as installation, ceiling installation, and machine room installation may be used.

<B>
In the above-described embodiment, the ventilator 6a, 6b is installed on the back of the ceiling. However, the present invention is not limited to this. For example, the ventilator 6a, 6b is not limited to this. It may be a type of ventilator. Moreover, in the said embodiment, although the type | mold type | mold which has the total heat exchangers 62a and 62b is employ | adopted as the ventilation apparatus 6a and 6b, it is not limited to this, For example, what has only a fan etc. Other types of ventilators may be used.

<C>
In the above embodiment, a wired communication connection in which each control device is connected via a communication line is adopted. However, the present invention is not limited to this, and other types of communication connection such as wireless communication are possible. Also good.

<D>
In the above embodiment, the refrigerant leak detection devices 11a and 11b are provided in the areas S1 and S2 of the air-conditioned space. However, the present invention is not limited to this, and for example, provided in the indoor units 3a, 3b, 3c, and 3d. It may be done.

<E>
In the above embodiment, the central control device 100 determines whether or not the refrigerant discharge operation is necessary. However, the present invention is not limited to this, and the indoor control devices 130a, 130b, 130c, and 130d may determine. .

<F>
In the above embodiment, the centralized control device 100 is provided in the area S2 of the air-conditioned space. However, it may be provided in another space inside the building to be air-conditioned, or a remote place such as outside the building to be air-conditioned. May be provided.

<G>
In the above embodiment, the central control device 100 is provided to control the air conditioner 1 for each of the areas S1 and S2 (area identification frames G1 and G2), but it corresponds to each indoor unit 3a, 3b, 3c, and 3d. When a remote controller is provided, one of these remote controllers may function as the central control device 100.

<H>
In the above embodiment, communication between the air conditioner 1 (specifically, the indoor units 3a, 3b, 3c, and 3d) and the ventilators 6a and 6b is performed by an indirect connection via the adapter devices 70a and 70b. However, the present invention is not limited to this. For example, when the indoor control devices 130a, 130b, 130c, and 130d and the ventilation control devices 160a and 160b can communicate with each other by direct connection, the adapter devices 70a and 70b may be omitted.

<I>
In the above embodiment, numbers and symbols such as “00”, “G1”, and “U1” are used as the unit number, unit number, area identification frame, and model code value. However, the present invention is not limited to this. It may be a character string indicating a specific name instead of a thing.

  INDUSTRIAL APPLICABILITY The present invention is widely applicable to an air-conditioning ventilation system that includes a refrigerant circuit in which refrigerant circulates and includes an air-conditioning apparatus that air-conditions the air-conditioned space and a ventilating apparatus that ventilates the air-conditioned space. is there.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 1a Refrigerant circuit 6a, 6b Ventilation apparatus 12 Air conditioning control apparatus 70a, 70b Adapter apparatus 160a, 160b Ventilation control apparatus

JP 2001-74283 A

Claims (3)

An air-conditioning ventilation system having a refrigerant circuit (1a) through which the refrigerant circulates and including an air-conditioning apparatus (1) for air-conditioning the air-conditioned space and a ventilating device (6a, 6b) for ventilating the air-conditioned space In
The air conditioning control device (12) for controlling the constituent devices of the air conditioner is configured such that, when leakage of the refrigerant is detected in a state where the air conditioner and the ventilator are in communication connection, the constituent device of the ventilator. Commanding the ventilation control device (160a, 160b) to control the ventilation device,
The air conditioning controller increases the air volume of the air conditioner when an air volume shortage of the ventilator occurs during operation of the ventilator when leakage of the refrigerant is detected,
Air conditioning ventilation system. The air conditioning control device (12) increases the air volume of the air conditioning device even when a communication connection abnormality occurs between the air conditioning device (1) and the ventilation device (6a, 6b).
The air-conditioning ventilation system according to claim 1. Adapter devices (70a, 70b) that enable communication between the air conditioner (1) and the ventilators (6a, 6b) are connected to the ventilation control devices (160a, 160b),
The adapter device is adapted to transmit information related to the air volume of the ventilation devices (6a, 6b) to the air conditioning control device (12).
The air-conditioning ventilation system according to claim 1 or 2.

Images