JP6572622B2 - Air conditioning ventilation system - Google Patents

Description

  The present invention relates to an air-conditioning ventilation system including an indoor unit of an air-conditioning apparatus and a ventilation device that are arranged in the same target 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 arranged indoors (target space). When the leakage of the combustible refrigerant is detected, a configuration is proposed in which the combustible refrigerant is discharged from the target space by operating the ventilation device.

  Here, when air conditioning and ventilation are performed in a building or the like by installing the air conditioning device and the ventilation device in a building or the like, the air conditioning device and the ventilation device are actually installed independently of each other. There are many cases. 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. Therefore, the air conditioner and the ventilator are often installed independently by different vendors at the installation site.

  However, even when the air conditioner and the ventilator are selected and installed independently, leakage of refrigerant from the air conditioner causes an oxygen deficiency accident or ignition accident in the target space (the refrigerant is slightly flammable or combustible). In order to prevent the occurrence of poisoning accidents (when the refrigerant is toxic), ventilate when the refrigerant leaks, and exceed the oxygen deficient concentration, flammable concentration or toxicity limit concentration in the target space It is important not to. However, if the air conditioner and the ventilator are selected and installed independently, installation work may be performed by different contractors, and it is assumed that the communication system is not reliably connected between the two devices. In addition, there may be a case where the ventilation device does not operate mechanically normally due to a failure or the like. In these cases, there is a risk that the air conditioner will be operated without any measures taken when the refrigerant leaks.

  Then, the subject of this invention is providing the air-conditioning ventilation system excellent in safety | security.

An air-conditioning ventilation system according to a first aspect of the present invention includes an air-conditioning device, a ventilation device, a controller, a ventilation control unit, and an output unit. The air conditioner includes an outdoor unit and an indoor unit. The indoor unit constitutes a refrigerant circuit together with the outdoor unit. The indoor unit is installed in the target space. During operation, the air conditioner circulates refrigerant in the refrigerant circuit to cool or heat the target space. The ventilation device includes a ventilation fan for ventilation. The ventilation device is installed in the target space. The controller controls the operation of the air conditioner. The ventilation control unit is electrically connected to the ventilation device. The ventilation control unit controls the operation of the ventilation device. The ventilation control unit communicates with the controller via a communication network. The output unit outputs information to the system administrator. The ventilation control unit transmits a transmission signal to the controller at a predetermined timing. The controller periodically determines whether or not the operation of the ventilator can be controlled based on the received transmission signal. When the controller determines that the operation of the ventilation device cannot be controlled, the controller causes the output unit to output predetermined information.

In the air-conditioning ventilation system according to the first aspect of the present invention, the ventilation control unit transmits a transmission signal to the controller at a predetermined timing, and whether or not the controller can control the operation of the ventilation device based on the received transmission signal. When it is determined periodically and it is determined that the operation of the ventilator cannot be controlled, the output unit is caused to output predetermined information. Thereby, when the operation of the ventilator is not controllable (for example, when the ventilator is not properly installed in the target space, when the communication between the ventilator and the ventilation control unit is not normally performed, or the ventilator In such a case, the user or administrator (system administrator) can be notified of this. As a result, if it is assumed that ventilation will not be performed reliably when refrigerant leakage occurs, the system administrator can recognize that the safety against refrigerant leakage is not ensured, and the countermeasures can be taken. It becomes possible. Therefore, security against refrigerant leakage is improved.

  The refrigerant used in the “refrigerant circuit” here is, for example, a slightly flammable refrigerant such as R32, a flammable refrigerant such as propane, or a toxicity such as ammonia. Refrigerant is included.

  The air-conditioning ventilation system which concerns on the 2nd viewpoint of this invention is an air-conditioning ventilation system which concerns on a 1st viewpoint, Comprising: A ventilation control part transmits a transmission signal regularly to a controller. If the controller does not receive a transmission signal for a predetermined time or more, it determines that the ventilator cannot be controlled.

The air-conditioning ventilation system which concerns on the 3rd viewpoint of this invention is an air-conditioning ventilation system which concerns on a 2nd viewpoint, Comprising: When a controller does not receive a new transmission signal more than predetermined time since reception of the last transmission signal, ventilation is carried out. Determine that the device is not controllable.

  This makes it possible to determine whether the controller can control the operation of the ventilator with an easy and simple configuration. Therefore, the security against refrigerant leakage is improved while suppressing costs.

  When the controller does not receive a transmission signal for a predetermined time or longer, for example, when the controller does not receive a transmission signal because the transmission signal is not transmitted from the ventilation control unit, or when the transmission signal is received from the ventilation control unit. This includes the case where the controller cannot normally receive the transmission signal even though it is being transmitted.

An air-conditioning ventilation system according to a fourth aspect of the present invention is the air-conditioning ventilation system according to any one of the first to third aspects , wherein the ventilation control unit is based on a control signal transmitted from the controller. Control start / stop or rotation speed. The ventilation control unit does not transmit a transmission signal to the controller when the rotation speed of the ventilation device does not match the control signal.

  This makes it possible to determine whether the controller can control the operation of the ventilator with an easy and simple configuration. Therefore, the security against refrigerant leakage is improved while suppressing costs.

An air-conditioning ventilation system according to a fifth aspect of the present invention is the air-conditioning ventilation system according to any one of the first to third aspects , wherein the ventilation control unit is based on a control signal transmitted from the controller. Control start / stop or rotation speed. A ventilation control part includes rotation speed information in a transmission signal, and transmits to a controller. The rotation speed information is information for notifying the controller of the rotation speed of the ventilation fan. Based on the transmission signal, the controller determines whether or not the rotational speed of the ventilator indicated in the received rotational speed information matches the control signal. The controller determines that the ventilator cannot be controlled when the rotation speed of the ventilator does not match the control signal.

  This makes it possible to determine whether the controller can control the operation of the ventilator with an easy and simple configuration. Therefore, the security against refrigerant leakage is improved while suppressing costs.

The air-conditioning ventilation system which concerns on the 6th viewpoint of this invention is an air-conditioning ventilation system which concerns on either of the 1st viewpoint to the 5th viewpoint , Comprising: A controller cannot control operation | movement of a ventilator based on the transmission signal to receive. If it is determined, the operation of the air conditioner is prohibited. Here, “prohibiting the operation of the air conditioner” includes both not starting the operation of the air conditioner in the operation stop state and stopping the operation of the air conditioner in the operation state. .

  Thereby, when the operation of the ventilator is not controllable (for example, when the ventilator is not properly installed in the target space, when the communication between the ventilator and the ventilation control unit is not normally performed, or the ventilator The air conditioner is not operated when the machine does not operate normally mechanically). That is, the air conditioner is operated only when the operation of the ventilator can be normally controlled. As a result, in a situation where it is not assumed that ventilation is performed reliably when refrigerant leakage occurs, the air conditioner is not operated, and thus security against refrigerant leakage is reliably ensured.

  In the air-conditioning ventilation system according to the first aspect of the present invention, when it is assumed that ventilation is not reliably performed when refrigerant leakage occurs, the system administrator does not ensure the security against refrigerant leakage. It becomes possible to recognize this and deal with it. Therefore, security against refrigerant leakage is improved.

In the air conditioning ventilation system according to the second aspect, the third aspect, the fourth aspect, or the fifth aspect of the present invention, the security against refrigerant leakage is improved while the cost is suppressed.

In the air-conditioning ventilation system according to the sixth aspect of the present invention, the air-conditioning system is not operated in a situation where it is not assumed that ventilation is performed reliably when refrigerant leakage occurs. Secured.

The schematic block diagram of the air-conditioning ventilation system which concerns on one Embodiment of this invention. The schematic diagram which showed the refrigerant circuit and transmission line comprised in an air-conditioning ventilation system. The schematic block diagram of a ventilation apparatus. The block diagram which shows typically each part connected to a controller and a controller. The flowchart which showed an example of the flow of a process of a state determination part (adapter unit). The schematic diagram which showed an example of the grouping table. The flowchart which showed an example of the flow of a process of a controller. The sequence diagram which showed typically an example of the process performed in a controller, an adapter unit, and a ventilator. The schematic diagram which showed the refrigerant circuit and transmission path comprised in the air-conditioning ventilation system which concerns on the modification D. FIG. The schematic diagram which showed the refrigerant circuit and transmission path comprised in the air-conditioning ventilation system which concerns on the modification E. FIG. The schematic diagram which showed the refrigerant circuit and transmission path comprised in the air-conditioning ventilation system which concerns on the modification N. FIG.

  An air conditioning ventilation system 100 according to an embodiment of the present invention will be described. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention, and can be appropriately changed without departing from the spirit of the present invention.

(1) Air conditioning ventilation system 100
FIG. 1 is a schematic configuration diagram of an air-conditioning ventilation system 100 according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing the refrigerant circuit RC and the transmission path configured in the air conditioning ventilation system 100.

  The air conditioning ventilation system 100 is a system that is installed in a building, a factory, or the like and realizes air conditioning such as cooling, heating, and ventilation of a target space. In the present embodiment, the air conditioning ventilation system 100 performs air conditioning of a plurality of target spaces SP (SP1 and SP2).

  The air conditioning ventilation system 100 mainly includes an air conditioning device 10 that cools or heats the target space SP and a plurality of ventilation devices 40. In addition, the air conditioning ventilation system 100 includes a plurality of adapter units 50 (ventilation control units), a plurality of refrigerant leakage sensors 60, and a controller 70 (air conditioning control unit, overall control unit) that comprehensively controls the operation of the air conditioning ventilation system 100. ) And.

  In the present embodiment, a case will be described in which the air conditioning and ventilation system 100 is configured using the air conditioning apparatus 10 and the ventilation apparatus 40 that are already installed in the target space SP. Specifically, the air conditioning ventilation system 100 is configured by additionally installing the adapter unit 50 in the target space SP in which the air conditioning apparatus 10 and the ventilation apparatus 40 are installed.

(1-1) Air conditioner 10
The air conditioner 10 includes a refrigerant circuit RC, and cools or heats each target space SP (SP1 and SP2) by circulating a refrigerant in the refrigerant circuit RC and performing a vapor compression refrigeration cycle.

  The air conditioner 10 mainly includes one outdoor unit 20 as a heat source unit, a plurality of (in this case, four) indoor units 30 as utilization units, and a plurality (two in this case) as input devices for inputting commands. ) And a centralized management device 39 that controls the operations of the outdoor unit 20 and each indoor unit 30 in an integrated manner.

  In the present embodiment, two indoor units 30 and one remote controller 35 are arranged in each target space SP. Specifically, the indoor units 30a and 30b and the remote controller 35a are arranged in the target space SP1, and the indoor units 30c and 30d and the remote controller 35b are arranged in the target space SP2.

  In the air conditioner 10, the refrigerant circuit RC is configured by connecting the outdoor unit 20 and each indoor unit 30 by the gas communication pipe GP and the liquid communication pipe LP.

  In the refrigerant circuit RC, for example, a refrigerant having a slight flammability such as R32, a refrigerant having a flammability such as propane, or a toxic refrigerant such as ammonia is enclosed in the refrigerant circuit RC.

(1-1-1) Outdoor unit 20
The outdoor unit 20 is installed outdoors. The outdoor unit 20 mainly includes a plurality of refrigerant pipes (first pipe P1 to sixth pipe P6), a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, an outdoor expansion valve 24, an outdoor The fan 25 and the outdoor unit controller 26 are included.

  The first pipe P <b> 1 is a refrigerant pipe that connects the gas communication pipe GP and the four-way switching valve 22. The second pipe P <b> 2 is a suction pipe that connects the four-way switching valve 22 and the suction port (not shown) of the compressor 21. The third pipe P <b> 3 is a discharge pipe that connects a discharge port (not shown) of the compressor 21 and the four-way switching valve 22. The fourth pipe P4 is a refrigerant pipe that connects the four-way switching valve 22 and the gas side of the outdoor heat exchanger 23. The fifth pipe P <b> 5 is a refrigerant pipe that connects the liquid side of the outdoor heat exchanger 23 and the outdoor expansion valve 24. The sixth pipe P6 is a refrigerant pipe that connects the outdoor expansion valve 24 and the liquid communication pipe LP.

  The compressor 21 is a mechanism that sucks low-pressure gas refrigerant, compresses it, and discharges it. The compressor 21 has a sealed structure in which a compressor motor 21a is built. In the compressor 21, a rotary type or scroll type compression element (not shown) housed in a compressor casing (not shown) is driven using the compressor motor 21a as a drive source. The compressor motor 21a is inverter-controlled during operation, and the rotation speed is adjusted according to the situation. When driven, the compressor 21 sucks refrigerant from the suction port, and after compression, discharges it from the discharge port.

  The four-way switching valve 22 is a switching valve for switching the direction in which the refrigerant flows in the refrigerant circuit RC. The four-way switching valve 22 is individually connected to the first pipe P1, the second pipe P2, the third pipe P3, and the fourth pipe P4. In the cooling operation, the four-way switching valve 22 switches the flow path so that the first pipe P1 and the second pipe P2 are connected and the third pipe P3 and the fourth pipe P4 are connected (FIG. 1 (see the solid line of the four-way selector valve 22). The four-way switching valve 22 switches the flow path so that the first pipe P1 and the third pipe P3 are connected and the second pipe P2 and the fourth pipe P4 are connected during the heating operation. (Refer to the broken line of the four-way switching valve 22 in FIG. 1).

  The outdoor heat exchanger 23 is a heat exchanger that functions as a refrigerant condenser or radiator during cooling operation and functions as a refrigerant evaporator during heating operation. The outdoor heat exchanger 23 includes a heat transfer tube (not shown) through which the refrigerant flows and a heat transfer fin (not shown) that increases the heat transfer area. The outdoor heat exchanger 23 is arranged so that heat can be exchanged between the refrigerant in the heat transfer tube and the air flow generated by the outdoor fan 25 during operation.

  The outdoor expansion valve 24 is an electric valve capable of adjusting the opening degree. The outdoor expansion valve 24 is fully opened during the cooling operation, and functions as an expansion valve that decompresses the refrigerant according to the opening degree during the heating operation.

  The outdoor fan 25 is a propeller fan, for example. Each outdoor fan 25 is connected to the output shaft of the outdoor fan motor 25a, and is driven in conjunction with the outdoor fan motor 25a. When driven, the outdoor fan 25 generates an air flow that flows into the outdoor unit 20 from the outside, passes through the outdoor heat exchanger 23, and flows out of the outdoor unit 20.

  The outdoor unit control unit 26 is a microcomputer configured with a CPU, a memory, and the like. The outdoor unit control unit 26 controls the operation of each actuator in the outdoor unit 20. The outdoor unit control unit 26 is connected to an indoor unit control unit 34 (described later) of each indoor unit 30 via a communication line, and transmits and receives signals to and from each other. The outdoor unit control unit 26 is connected to the central management control unit 391 of the central management device 39 via a communication network such as a WAN or a LAN, and transmits / receives signals to / from each other. The outdoor unit controller 26 relays signals transmitted and received in communication between each indoor unit controller 34, the remote controller 36 of each remote controller 35, or each adapter unit 50, and the centralized management controller 391. To do.

(1-1-2) Indoor unit 30
The indoor unit 30 is, for example, a so-called ceiling-embedded type, ceiling-suspended type, or wall-mounted type indoor unit. The indoor unit 30 forms a refrigerant circuit RC together with the outdoor unit 20. The indoor unit 30 mainly includes an indoor heat exchanger 31, an indoor expansion valve 32, an indoor fan 33, and an indoor unit control unit 34.

  The indoor heat exchanger 31 is a heat exchanger that functions as a refrigerant evaporator during cooling operation and functions as a refrigerant condenser or radiator during heating operation. The indoor heat exchanger 31 is a so-called cross fin tube heat exchanger. The indoor heat exchanger 31 has one end connected to the refrigerant pipe extending to the indoor expansion valve 32 and the other end connected to the gas communication pipe GP. The indoor heat exchanger 31 is arranged so that heat can be exchanged between the refrigerant in the heat transfer tube (not shown) and the air flow generated by the indoor fan 33 during operation.

  The indoor expansion valve 32 is an electric valve capable of adjusting the opening degree. The indoor expansion valve 32 is controlled to the minimum opening when the operation of the indoor unit 30 is stopped. The indoor expansion valve 32 functions as an expansion valve that depressurizes the refrigerant according to the opening during the cooling operation, and is fully opened during the heating operation.

  The indoor fan 33 is, for example, a propeller fan or a multiblade fan, and is connected to the output shaft of the indoor fan motor 33a. The indoor fan 33 is driven in conjunction with the indoor fan motor 33a. When driven, the indoor fan 33 generates an air flow that flows into the indoor unit 30 and flows out of the indoor unit 30 after passing through the indoor heat exchanger 31.

  The indoor unit control unit 34 is a microcomputer configured with a CPU, a memory, and the like. The indoor unit control unit 34 controls the operation of each actuator in the indoor unit 30. Each indoor unit control unit 34 transmits and receives signals to and from the outdoor unit control unit 26 or the centralized management control unit 391 of the centralized management device 39. Each indoor unit control unit 34 communicates with the remote control unit 36 and the adapter unit 50 of the corresponding remote control 35 via the network NW. Each indoor unit control unit 34 relays signals transmitted and received in communication between the remote control unit 36 or adapter unit 50 of the corresponding remote controller 35 and the outdoor unit control unit 26 or the centralized management control unit 391. .

  In the present embodiment, the network NW is a so-called wired network formed of communication lines, and functions as an electrical signal transmission path. Specifically, the network NW is constructed by the communication line CB1 in the target space SP1, and the network NW is constructed by the communication line CB2 in the target space SP2.

(1-1-3) Remote control 35
The remote control 35 displays a remote control control unit 36 including a microcomputer composed of a CPU, a memory, and the like, a remote control input unit 37 including an input key for inputting a command to the air conditioner 10, and information related to an operation state. And a remote control display unit 38 (output unit) including a display for (output).

  The remote controller 35 (remote controller 36) transmits and receives signals to and from the indoor unit controller 34 of the indoor unit 30 arranged in the same target space SP via the network NW. In the present embodiment, the remote control unit 36 of the remote control 35a is connected to the indoor unit control unit 34 of the indoor unit 30b via the communication line CB1. The remote control unit 36 of the remote control 35b is connected to the indoor unit control unit 34 of the indoor unit 30d via the communication line CB2.

  The remote controller 35 (remote control unit 36) communicates with the outdoor unit controller 26, the central management controller 391, or the adapter unit 50 by relaying a signal to the indoor unit controller 34.

  When a command is input to the remote control input unit 37 by a user or an administrator (hereinafter referred to as “system administrator”), the remote control control unit 36 sends a predetermined signal to another unit according to the input command. Send to. In addition, when receiving a predetermined signal (display information) transmitted from another unit, the remote control control unit 36 causes the remote control display unit 38 to display information corresponding to the received signal.

(1-1-4) Centralized management device 39
The central management device 39 is a computer that comprehensively controls the operation of the air conditioning ventilation system 100 including the air conditioning device 10 and the plurality of ventilation devices 40. The central management device 39 is, for example, a server arranged in a monitoring room or a central management room that is separated from each target space SP. The central management device 39 includes a central management control unit 391 including a CPU and a memory such as a ROM, a RAM, and a flash memory. The centralized management device 39 includes an input unit 392 including an input key for inputting a command by the system administrator, and a display unit 393 (output unit) including a liquid crystal display for displaying (outputting) information to the system administrator. Have.

  The central management control unit 391 exchanges signals with the outdoor unit control unit 26. The central management control unit 391 communicates with the indoor unit control unit 34, the remote control control unit 36, or the adapter unit 50 by relaying a signal to the outdoor unit control unit 26.

(1-2) Ventilation device 40
FIG. 3 is a schematic configuration diagram of the ventilation device 40. The ventilator 40 ventilates the target space SP. The ventilation device 40 is installed independently of the air conditioner 10 in the target space SP (more specifically, the ceiling space of the target space SP). The ventilator is supplied with power from a commercial power source 5.

  The air-conditioning ventilation system 100 includes a plurality (two in this case) of ventilators 40 (ventilators 40a and 40b). The ventilation device 40a is disposed in the target space SP1, and the ventilation device 40b is disposed in the target space SP2.

  Each ventilation device 40 has a plurality of ducts (an intake duct 401, an air supply duct 402, an extraction duct 403, and an exhaust duct 404). The intake duct 401 is connected to an intake port for taking outdoor air OA into the target space SP. The air supply duct 402 is connected to an air supply port that supplies the outdoor air OA as the supply air SA. The take-out duct 403 is connected to an take-out port for taking out the room air RA from the target space SP. The exhaust duct 404 is connected to a discharge port for discharging the room air RA as the discharge air EA to the outside.

  Each ventilation device 40 includes a main body frame 41, a heat exchanger 42, an air supply fan 43 (ventilation fan) and an exhaust fan 44 (ventilation fan) for ventilation, and a fan drive control unit 45 (drive unit, drive). Voltage supply unit).

  The main body frame 41 accommodates (holds) an air supply fan 43 and an exhaust fan 44. In the main body frame 41, two air flow paths (a supply flow path 41a and an exhaust flow path 41b) that are partitioned from each other are formed. The air supply passage 41a and the exhaust passage 41b are formed so as to cross the heat exchanger 42, respectively. One end of the air supply channel 41 a is connected to the intake duct 401, and the other end is connected to the air supply duct 402. The air supply channel 41a is an air channel for flowing air from the outdoor toward the target space SP. One end of the exhaust passage 41 b is connected to the extraction duct 403, and the other end is connected to the exhaust duct 404. The exhaust flow path 41b is an air flow path for flowing air from the target space SP toward the outside of the room.

  The heat exchanger 42 is a total heat exchanger that simultaneously exchanges sensible heat and latent heat between two air flows (here, the indoor air RA and the outdoor air OA). The heat exchanger 42 is disposed in the main body frame 41 and is positioned on the two air supply passages 41a.

  The air supply fan 43 generates an air flow from the outdoor toward the target space SP. The air supply fan 43 is a sirocco fan, and includes an air supply fan motor 43a that is a drive unit. The air supply fan 43 is disposed in the main body frame 41 and is located on the air supply passage 41a.

  The exhaust fan 44 generates an air flow from the target space SP toward the outdoor. The exhaust fan 44 is a sirocco fan and includes an exhaust fan motor 44a that is a drive unit. The exhaust fan 44 is located on the exhaust passage 41b.

  The fan drive control unit 45 is a control unit that controls driving of the air supply fan 43 (air supply fan motor 43a) and the exhaust fan 44 (exhaust fan motor 44a). The fan drive control unit 45 is accommodated in an electrical component box 411 provided in the main body frame 41. The fan drive controller 45 determines an inverter (not shown) that supplies a drive voltage corresponding to the rotation speed to the supply fan motor 43a and the exhaust fan motor 44a, and a voltage to be supplied based on the rotation speed (air volume). A voltage determining unit (not shown). That is, the ventilation device 40 of the present embodiment can adjust the rotation speeds of the air supply fan 43 and the exhaust fan 44.

  The fan drive control unit 45 has a connection terminal 451 (see FIG. 4) for electrical connection with an external device. The fan drive control unit 45 is electrically connected to a device (here, the adapter unit 50) connected to the other end of the communication line by connecting one end of the communication line to the connection terminal 451. Communication is possible.

  The fan drive control unit 45 receives a control signal (a rotational speed control signal described later) from the adapter unit 50 connected via the connection terminal 451 and the communication line (that is, the control signal is transmitted via the connection terminal 451). And the supply voltage is supplied to the supply fan motor 43a or the exhaust fan motor 44a so that the supply fan motor 43a or the exhaust fan motor 44a is driven at the rotation speed based on the rotation speed control signal.

(1-3) Adapter unit 50
The adapter unit 50 is a unit that controls the operation of the corresponding ventilation device 40 (the supply fan 43 and the exhaust fan 44) by transmitting a control signal to the fan drive control unit 45. The air-conditioning ventilation system 100 includes a plurality (here, two) of adapter units 50 (a first adapter unit 50a and a second adapter unit 50b). Specifically, the first adapter unit 50a is disposed in the target space SP1 and corresponds to the ventilation device 40a. The second adapter unit 50b is disposed in the target space SP2 and corresponds to the ventilation device 40b.

  The adapter unit 50 is configured separately from the corresponding ventilation device 40 (main body frame 41) and is arranged independently. In particular, in the present embodiment, the adapter unit 50 is additionally arranged in the target space SP where the air conditioner 10 and the ventilator 40 are already installed.

  The adapter unit 50 includes a microcomputer including a memory such as a ROM and a RAM, a CPU, and the like. The adapter unit 50 includes a communication module for transmitting and receiving signals to and from the fan drive control unit 45 and the indoor unit control unit 34.

  The adapter unit 50 is configured to supply an air supply fan 43 (air supply fan motor 43a) and / or an exhaust fan to the fan drive control unit 45 based on a signal (control signal) transmitted from the indoor unit control unit 34 (controller 70). 44 (exhaust fan motor 44a) and a signal including a command for switching the rotational speed (hereinafter referred to as “rotational speed control signal”) are transmitted. That is, the adapter unit 50 controls the start and stop of the ventilation fan and the rotation speed based on the received control signal.

  When the power is turned on, the adapter unit 50 can normally communicate with the fan drive control unit 45 periodically (every time the predetermined time t1 elapses), and the ventilation device 40 is mechanically normal. It is determined whether or not to operate (hereinafter referred to as “state determination”). In the present embodiment, the predetermined time t1 is set to 1 min.

  The adapter unit 50 indicates that the determination result in the state determination is normal (that is, communication between the adapter unit 50 and the ventilator 40 is normally possible, and the ventilator 40 operates mechanically normally). When confirmed, a transmission signal (hereinafter, “status notification signal”) is transmitted to the indoor unit control unit 34. In other words, the adapter unit 50 can regularly communicate with the fan drive control unit 45 and the indoor unit control unit 34 (controller 70) periodically when the ventilator 40 is mechanically operating normally. ) Transmits a state notification signal (notification signal). Specifically, in the state determination, the adapter unit 50 determines that the operation of the ventilator 40 with respect to the drive command or the rotational speed control signal is normal (specifically, the ventilator 40 in the stopped state receives the drive command). In the case of normal driving, or when the rotational speed of the air supply fan 43 or exhaust fan 44 being driven matches the latest rotational speed control signal transmitted), communication with the ventilator 40 is possible normally. It is determined that the ventilation device 40 is in a state of mechanically operating normally.

  On the other hand, in the adapter unit 50, the determination result in the state determination is not normal (that is, communication between the adapter unit 50 and the ventilator 40 can be normally performed, and the ventilator 40 is mechanically operated normally). If not, the state notification signal is not transmitted to the indoor unit control unit 34. That is, the adapter unit 50 does not transmit a state notification signal to the controller 70 when the rotation speed of the ventilation device 40 does not match the control signal. Specifically, the adapter unit 50 has a case where the operation of the ventilator 40 with respect to the drive command or the rotational speed control signal is not normal (specifically, when the ventilator 40 in a stopped state receives the drive command and does not drive normally). Or when the rotational speed of the air supply fan 43 or the exhaust fan 44 being driven does not match the latest rotational speed control signal transmitted), or communication with the ventilator 40 cannot be performed normally, or the ventilator 40 is determined not to operate mechanically normally.

  The adapter unit 50 detects the on / off state and the rotational speed of the air supply fan 43 and the exhaust fan 44 by a known method based on the motor current flowing through the air supply fan motor 43a and the exhaust fan motor 44a, changes in magnetic flux, and the like. To do.

  Here, the state notification signal is in a state in which communication between the adapter unit 50 and the fan drive control unit 45 (ventilator 40) and communication between the adapter unit 50 and the indoor unit control unit 34 (controller 70) can be normally performed. This is a signal for notifying the indoor unit control unit 34 (controller 70) that the ventilation device 40 is in a state of mechanically operating normally. That is, when the adapter unit 50 is in a state in which the operation of the ventilation device 40 can be controlled, the adapter unit 50 transmits a state notification signal to the indoor unit control unit 34 (controller 70) periodically (every time the predetermined time t1 elapses).

  Details of the adapter unit 50 will be described later in “(3) Details of the adapter unit 50”.

(1-4) Refrigerant leakage sensor 60
The refrigerant leakage sensor 60 is a sensor for detecting refrigerant leakage in the target space SP. In the present embodiment, a known general-purpose product is used for the refrigerant leakage sensor 60.

  The refrigerant leakage sensor 60 is disposed in the corresponding target space SP. The air-conditioning ventilation system 100 includes a plurality (two) of refrigerant leakage sensors 60 (first refrigerant leakage sensor 60a and second refrigerant leakage sensor 60b).

  The first refrigerant leakage sensor 60a is installed in the target space SP1. The second refrigerant leakage sensor 60b is installed in the target space SP2.

  Each refrigerant leakage sensor 60 is electrically connected to the indoor unit controller 34 of the indoor unit 30 installed in the same target space SP1. The first refrigerant leakage sensor 60a is electrically connected to the indoor unit control unit 34 of the indoor unit 30b. The second refrigerant leakage sensor 60b is electrically connected to the indoor unit control unit 34 of the indoor unit 30d.

  When the refrigerant leakage sensor 60 detects refrigerant leakage, the refrigerant leakage sensor 60 outputs an electrical signal indicating that refrigerant leakage has occurred (hereinafter referred to as “refrigerant leakage signal”) to the connected indoor unit control unit 34.

(1-5) Controller 70
In the air conditioning ventilation system 100, the outdoor unit control unit 26, each indoor unit control unit 34, the remote control control unit 36 of each remote controller 35, and the centralized management control unit 391 are connected via a communication network, A controller 70 that controls the operation of the air-conditioning ventilation system 100 is configured. Details of the controller 70 will be described later in “(4) Details of the controller 70”.

(2) Operation of the air-conditioning ventilation system 100 (2-1) Cooling operation When a control related to the cooling operation is executed by the controller 70, for example, when a cooling operation start instruction is input to the remote controller 35, the four-way switching valve 22 is operated. Is switched to the cooling operation state (the state indicated by the solid line of the four-way switching valve 22 in FIG. 2), and the compressor 21 and the outdoor fan 25 are started. Further, the indoor fan 33 of the indoor unit 30 (hereinafter referred to as “cooling indoor unit 30”) installed in the target space SP in which the cooling operation is performed is activated, and the indoor expansion valve 32 is opened at an appropriate opening degree.

  In such a state, the refrigerant flowing into the indoor heat exchanger 31 of the cooling indoor unit 30 exchanges heat with the air flow generated by the indoor fan 33 and evaporates. The refrigerant flowing out of the indoor heat exchanger 31 passes through the gas communication pipe GP, the first pipe P1, the four-way switching valve 22, and the second pipe P2, and is sucked into the compressor 21 and compressed. The refrigerant discharged from the compressor 21 passes through the third pipe P3, the four-way switching valve 22, and the fourth pipe P4 and flows into the outdoor heat exchanger 23.

  The refrigerant flowing into the outdoor heat exchanger 23 is condensed by exchanging heat with the air flow generated by the outdoor fan 25. The refrigerant that has flowed out of the outdoor heat exchanger 23 passes through the fifth pipe P5, the outdoor expansion valve 24, the sixth pipe P6, and the liquid communication pipe LP and flows into the indoor expansion valve 32 of the cooling indoor unit 30. The refrigerant flowing into the indoor expansion valve 32 is decompressed according to the opening degree of the indoor expansion valve 32. The refrigerant that has flowed out of the indoor expansion valve 32 flows into the indoor heat exchanger 31 again.

(2-2) Heating Operation When the controller 70 executes control related to the heating operation, for example, when a heating operation start instruction is input to the remote controller 35, the four-way switching valve 22 is in the heating operation state (four in FIG. 2). The state is indicated by the broken line of the path switching valve 22), and the compressor 21 and the outdoor fan 25 are activated. Moreover, the outdoor expansion valve 24 is opened at an appropriate opening degree. Moreover, the indoor fan 33 of the indoor unit 30 (hereinafter referred to as “heating indoor unit 30”) installed in the target space SP in which the heating operation is performed is activated.

  In such a state, the refrigerant flowing into the outdoor heat exchanger 23 evaporates by exchanging heat with the air flow generated by the outdoor fan 25. The refrigerant that has flowed out of the outdoor heat exchanger 23 passes through the fourth pipe P4, the four-way switching valve 22, and the second pipe P2, and is sucked into the compressor 21 and compressed. The refrigerant discharged from the compressor 21 passes through the third pipe P3, the four-way switching valve 22, the first pipe P1, and the gas communication pipe GP and flows into the indoor heat exchanger 31 of the heating indoor unit 30.

  The refrigerant flowing into the indoor heat exchanger 31 is condensed by exchanging heat with the air flow generated by the indoor fan 33. The refrigerant that has flowed out of the indoor heat exchanger 31 passes through the indoor expansion valve 32, the liquid communication pipe LP, and the sixth pipe P6 and flows into the outdoor expansion valve 24. The refrigerant flowing into the outdoor expansion valve 24 is decompressed according to the opening degree of the outdoor expansion valve 24. The refrigerant that has flowed out of the outdoor expansion valve 24 flows into the outdoor heat exchanger 23 again.

(2-3) Ventilation operation When the ventilation device 40 is instructed to start ventilation operation, the air supply fan 43 and the exhaust fan 44 are activated. In addition, the instruction | indication of ventilation operation has the case by the request | requirement from the adapter unit 50, and the case by the request | requirement from the controller 70. FIG.

  When the air supply fan 43 and the exhaust fan 44 are driven, the outdoor air OA that has flowed into the ventilator 40 from the outside through the intake duct 401 and the room air that has flowed into the ventilator 40 from the target space SP through the take-out duct 403. RA performs heat exchange in the heat exchanger 42. Thereafter, the outdoor air OA subjected to heat exchange in the heat exchanger 42 is supplied to the target space SP as supply air SA through the air supply duct 402. Further, the indoor air RA that has exchanged heat in the heat exchanger 42 is exhausted to the outside as exhaust air EA through the exhaust duct 404.

(2-4) Forced ventilation operation In the air conditioning ventilation system 100, when the refrigerant leaks in the target space SP, the forced ventilation operation is performed to discharge the leaked refrigerant to the outside.

  Specifically, when the refrigerant leaks from the refrigerant circuit RC and the leaked refrigerant flows into the target space SP, the refrigerant leakage sensor 60 detects the refrigerant leakage. The controller 70 receives a signal from the refrigerant leak sensor 60, detects that the refrigerant leak has occurred, and activates the ventilator 40 installed in the target space SP where the refrigerant leak sensor 60 has detected the refrigerant leak. Then, a forced ventilation operation start signal is transmitted to the corresponding adapter unit 50. Thereby, the air supply fan 43 and the exhaust fan 44 are activated. In such forced ventilation operation, the air supply fan 43 and the exhaust fan 44 continue to be driven, for example, in a state where the rotation speed (air volume) is maximum.

  At this time, the controller 70 controls the indoor expansion valve 32 of each indoor unit 30 to the minimum opening (fully closed state), stops the indoor fan 33, and stops the compressor 21 and the outdoor fan 25. Thereby, the circulation of the refrigerant is stopped in the refrigerant circuit RC, and further refrigerant leakage is suppressed.

  In addition, the controller 70 includes information indicating that the refrigerant leak has occurred and information for specifying the target space SP in which the refrigerant leak has occurred in order to notify the system administrator that the refrigerant leak has occurred. The information is displayed on the display unit 393 of the central management device 39 and the remote control display unit 38 of each remote controller 35.

(3) Details of Adapter Unit 50 FIG. 4 is a block diagram schematically showing the controller 70 and each part connected to the controller 70.

  The adapter unit 50 mainly includes an adapter unit storage unit 51, an adapter unit communication unit 52, an adapter unit input unit 53, an adapter unit control unit 54, and a state determination unit 55.

(3-1) Adapter unit storage unit 51
The adapter unit storage unit 51 includes a ROM, a RAM, a flash memory, and the like. The adapter unit storage unit 51 includes volatile and nonvolatile storage areas for storing various types of information. The adapter unit storage unit 51 stores a program used for processing of each unit in the adapter unit 50.

  The adapter unit storage unit 51 includes an operation command determination flag 51a for determining whether or not an operation start instruction is input from the system administrator or the controller 70. The operation command determination flag 51a is set when an operation start instruction is input to the ventilator 40, and is canceled when the ventilator 40 is stopped.

  The adapter unit storage unit 51 includes an air volume determination flag 51b for determining the rotation speed (air volume) input from the system administrator or the controller 70. The air volume determination flag 51b includes a predetermined number of bits so that the rotation speed (air volume) of each of the air supply fan 43 and the exhaust fan 44 can be determined stepwise.

(3-2) Adapter unit communication unit 52
The adapter unit communication unit 52 receives the signals transmitted from the controller 70 and the fan drive control unit 45 and stores them in a predetermined storage area of the adapter unit storage unit 51.

  Further, when the adapter unit communication unit 52 receives the operation start signal or the forced ventilation operation start signal transmitted from the controller 70, the adapter unit communication unit 52 sets the operation command determination flag 51a.

  Further, when the adapter unit communication unit 52 receives a signal (control signal) indicating the rotational speed transmitted from the controller 70 or the like, the adapter unit communication unit 52 sets the air volume determination flag 51b so as to correspond to the rotational speed.

  Further, when the adapter unit communication unit 52 receives the forced ventilation operation start signal transmitted from the controller 70, the air volume determination flag 51b so as to correspond to the maximum rotation speed (maximum air volume) of the air supply fan 43 and the exhaust fan 44. Set.

  The adapter unit communication unit 52 transmits a predetermined signal in response to requests from other units. For example, the adapter unit communication unit 52 receives a request from the adapter unit control unit 54 and transmits a rotation speed control signal to the fan drive control unit 45.

(3-3) Adapter unit input section 53
The adapter unit input unit 53 is a part that receives a command input by a system administrator via an input key (not shown) or the like. When the adapter unit input unit 53 receives the operation start instruction input by the system administrator, the adapter unit input unit 53 sets the operation command determination flag 51a. When the adapter unit input unit 53 receives a rotation speed (air volume) designation instruction input by the system administrator, the adapter unit input unit 53 sets the air volume determination flag 51b so as to correspond to the specified rotation speed (air volume).

(3-4) Adapter unit controller 54
The adapter unit control unit 54 transmits a predetermined signal to the fan drive control unit 45 in order to adjust the start and stop of the air supply fan 43 and the exhaust fan 44 and the air volume.

  When the operation command determination flag 51 a is set, the adapter unit control unit 54 refers to the air volume determination flag 51 b and transmits a rotation speed control signal to the fan drive control unit 45. As a result, the air supply fan 43 and the exhaust fan 44 are driven at the designated rotational speed (air volume).

  Further, when the operation command determination flag 51 a is canceled, the adapter unit control unit 54 transmits an operation stop signal to the fan drive control unit 45. Thereby, the air supply fan 43 and the exhaust fan 44 are stopped.

(3-5) State determination unit 55
FIG. 5 is a flowchart illustrating an example of the processing flow of the state determination unit 55.

  The state determination unit 55 is a functional unit that determines whether or not the operation of the ventilation device 40 can be normally controlled. The state determination unit 55 has a timer function and can measure time.

  When the power is turned on, the state determination unit 55 performs a state determination every time a predetermined time t1 (10 sec) elapses with respect to the fan drive control unit 45 (see step S101 and step S102 in FIG. 5).

  As a result of the state determination, the state determination unit 55 can normally communicate with the ventilator 40 and is in a state where the ventilator 40 operates mechanically normally (that is, the ventilator 40 operates normally). If it is determined, the status notification signal is generated and transmitted to the controller 70 by the adapter unit communication unit 52 (see steps S103 and S104 in FIG. 5).

(4) Details of Controller 70 As shown in FIG. 4, the controller 70 is electrically connected to each adapter unit 50 (the first adapter unit 50a and the second adapter unit 50b). The controller 70 is electrically connected to each refrigerant leak sensor 60 (the first refrigerant leak sensor 60a and the second refrigerant leak sensor 60b). The controller 70 is electrically connected to each actuator (compressor 21, four-way switching valve 22, outdoor expansion valve 24, outdoor fan 25, indoor expansion valve 32, indoor fan 33, etc.) of the air conditioner 10. ing. In addition, the controller 70 is electrically connected to the remote control input unit 37 and the remote control display unit 38 of each remote controller 35 and the input unit 392 and the display unit 393 of the centralized management device 39.

  The controller 70 mainly includes a storage unit 71, a communication unit 72, an input control unit 73, a group setting unit 74, an actuator control unit 75, an operation permission unit 76, a forced ventilation control unit 77, and a display control unit. 78.

(4-1) Storage unit 71
The storage unit 71 includes a ROM, a RAM, a flash memory, and the like. The storage unit 71 includes a volatile or nonvolatile storage area for storing various types of information. The storage unit 71 stores a program used for processing of each unit in the controller 70.

  The storage unit 71 appropriately stores command information that is information for specifying setting items such as operation start, operation stop, operation mode, set temperature, set air volume, and wind direction, which are input by the system administrator.

  The storage unit 71 stores a grouping table TB1 (described later) used for group control (described later).

  Further, the storage unit 71 can normally communicate with the ventilator 40, and whether or not the ventilator 40 is in a state of mechanically operating normally (that is, the ventilator 40 can be normally controlled). State determination flags 71a and 71b for determining each ventilation device 40. The state determination flags 71a and 71b correspond one-to-one with any adapter unit 50 (that is, any ventilation device 40).

  Specifically, the state determination flag 71a corresponds to the first adapter unit 50a (that is, the ventilation device 40a), can normally communicate with the ventilation device 40a, and the ventilation device 40a is mechanically normal. It is a flag for discriminating whether or not it is in a state of operating in a normal state. The state determination flag 71b corresponds to the second adapter unit 50b (that is, the ventilator 40b), can normally communicate with the ventilator 40b, and the ventilator 40b operates mechanically normally. It is a flag for determining whether or not it is in a state.

  The state determination flags 71a and 71b are set when the controller 70 receives the state notification signal, and are canceled when no new state notification signal is received for a predetermined time t2 or more after receiving the previous state notification signal. That is, when the controller 70 does not receive the state notification signal from the adapter unit 50, or when it does not receive a new state notification signal for a predetermined time t2 or more from the previous state notification signal, the controller 70 is between the adapter unit 50 and the ventilator 40. Or the communication between the controller 70 and the adapter unit 50 is not normally performed, or the ventilation device 40 is in a state in which the ventilator 40 is not mechanically operating normally, and the state determination flag is not set or To release. In the present embodiment, the predetermined time t2 is set to 3 min.

  Further, the storage unit 71 includes refrigerant leakage determination flags Fa and Fb for individually determining the detection results of the respective refrigerant leakage sensors 60 (that is, the presence or absence of refrigerant leakage in each target space SP). The refrigerant leakage determination flags Fa and Fb correspond to one of the refrigerant leakage sensors 60 on a one-to-one basis. Specifically, the refrigerant leakage determination flag Fa corresponds to the first refrigerant leakage sensor 60a. The refrigerant leakage determination flag Fb corresponds to the second refrigerant leakage sensor 60b. The refrigerant leakage determination flags Fa and Fb are set when a refrigerant leakage signal is received from the corresponding refrigerant leakage sensor 60 (that is, when refrigerant leakage occurs in the target space SP where the corresponding refrigerant leakage sensor 60 is installed). .

  In addition, in the storage unit 71, an operation availability determination flag (G 1 and G 2) that identifies whether the operation of the indoor unit 30 is permitted by the operation permission unit 76 for each group described later is the number of groups (here, Two).

  The driving propriety determination flag G1 corresponds to group 1 (described later), and the driving propriety determination flag G2 corresponds to group 2 (described later). When the driving enable / disable determination flag G1 is not set, the operation of the indoor units 30 (30a and 30b) belonging to the group 1 is prohibited. When the driving enable / disable determination flag G1 is set, the operation of the indoor unit 30 is permitted. Shows the state. In addition, when the driving enable / disable determination flag G2 is not set, the operation of the indoor units 30 (30c and 30d) belonging to the group 2 is prohibited. When the driving enable / disable determination flag G2 is set, the operation of the indoor unit 30 is performed. Indicates a permitted state.

(4-2) Communication unit 72
The communication unit 72 receives signals transmitted from other units (the adapter unit 50, the remote controller 35, or an actuator, a sensor, or the like) and stores them in a predetermined storage area of the storage unit 71. Further, when the communication unit 72 receives the state notification signal from the fan drive control unit 45, the communication unit 72 sets a state determination flag (71a or 71b) corresponding to the adapter unit 50 of the transmission source. Further, when the communication unit 72 receives a refrigerant leakage signal from the refrigerant leakage sensor 60, the communication unit 72 sets a corresponding refrigerant leakage determination flag (Fa or Fb).

(4-3) Input control unit 73
The input control unit 73 receives a system administrator command input to the remote control input unit 37 of each remote control 35 or the input unit 392 of the centralized management device 39, executes processing corresponding to the command, and stores the processing result. 71 in a predetermined storage area.

  For example, the input control unit 73 specifies the input instruction when the system administrator newly inputs setting items such as operation start, operation stop, operation mode, set temperature, set air volume, and wind direction. Command information is stored in the storage unit 71.

(4-4) Group setting unit 74
The group setting unit 74 creates a table based on the grouping setting (hereinafter referred to as “grouping table TB1”) and stores it in the storage unit 71 when the system administrator performs grouping setting. .

  The grouping setting is a process of registering the devices (specifically, the indoor unit 30, the ventilation device 40, and the refrigerant leakage sensor 60) included in the air conditioning ventilation system 100 as a group. Such grouping setting is performed to execute group control for comprehensively controlling the operation state for each group.

  FIG. 6 is a schematic diagram illustrating an example of the grouping table TB1. In FIG. 6, for each device, a variable “unit number” that is unique identification information, a variable “group number” that is information specifying the group to which the device belongs, and a variable “model code” that is information specifying the type of device. Are individually defined.

  For example, the unit number of the indoor unit 30a is defined as “1”. As for the unit number values of other devices, the indoor unit 30b is “2”, the indoor unit 30c is “3”, the indoor unit 30d is “4”, the ventilation device 40a is “5”, and the ventilation device 40b is “ 6 ”, the first refrigerant leak sensor 60a is defined as“ 7 ”, and the second refrigerant leak sensor 60b is defined as“ 8 ”.

  Further, the group number of the indoor unit 30a is defined as “1”. As for the group number values of other devices, the indoor unit 30b is “1”, the indoor unit 30c is “2”, the indoor unit 30d is “2”, the ventilator 40a is “1”, and the ventilator 40b is “1”. 2 ”, the first refrigerant leakage sensor 60a is defined as“ 1 ”, and the second refrigerant leakage sensor 60b is defined as“ 2 ”. That is, in the grouping table TB1 shown in FIG. 6, the indoor unit 30a, the indoor unit 30b, the ventilation device 40a, and the first refrigerant leakage sensor 60a installed in the target space SP1 belong to the same group (group 1). It is shown that. Further, it is shown that the indoor unit 30c, the indoor unit 30d, the ventilation device 40b, and the second refrigerant leakage sensor 60b installed in the target space SP2 belong to the same group (group 2).

  For the indoor unit 30a, the indoor unit 30b, the indoor unit 30c, and the indoor unit 30d, the value of the model code is defined as “1” indicating that it is an indoor unit. For the ventilators 40a and 40b, the value of the model code is defined as “2” indicating that the ventilator 40 is used. For the first refrigerant leak sensor 60 a and the second refrigerant leak sensor 60 b, the value of the model code is defined as “3” indicating that the refrigerant leak sensor 60 is used.

  The group setting unit 74 appropriately updates the grouping table TB1 when a new grouping setting is made by the system administrator. Thereby, in the air-conditioning ventilation system 100, operation | movement of the some indoor unit 30 and the ventilation apparatus 40 is controlled centrally, and the indoor unit 30 installed in the same object space SP and the ventilation apparatus 40 are made to interlock | cooperate (that is, Group control).

  In this embodiment, the indoor unit 30a is set as a group 1 parent device, and the indoor unit 30c is set as a group 2 parent device.

(4-5) Actuator controller 75
The actuator control unit 75 is configured according to the control program to each actuator (for example, the compressor 21, the four-way switching valve 22, the outdoor expansion valve 24, the outdoor fan 25, the indoor expansion valve 32, and the indoor fan 33) included in the air conditioner 10. Etc.) are controlled individually according to the situation.

  Further, when group control is required, the actuator control unit 75 controls the operating state of the devices included in the air-conditioning ventilation system 100 for each group based on the grouping table TB1 stored in the storage unit 71. Execute group control to control. The case where the group control is required is a case where the system administrator inputs a command for switching the operation state for each group.

  The actuator controller 75 appropriately refers to the refrigerant leakage determination flags Fa and Fb, and when the refrigerant leakage determination flag Fa or Fb is set, drives the indoor fan 33 at the maximum number of revolutions and causes the air conditioner 10 to Control other included actuators to stop operation. Specifically, the actuator control unit 75 controls the indoor expansion valve 32 to the minimum opening (fully closed) and stops driving the compressor 21 and the outdoor fan 25.

  The reason why the indoor fan 33 is driven at the maximum number of revolutions when the refrigerant leaks in this way is to stir the refrigerant that has leaked in the target space SP and prevent the refrigerant concentration from increasing. The indoor expansion valve 32 is controlled to the minimum opening (fully closed) and the driving of the compressor 21 and the outdoor fan 25 is stopped by stopping the circulation of the refrigerant in the refrigerant circuit RC and further refrigerant leakage. It is for suppressing.

  Further, the actuator controller 75 appropriately refers to the driving availability determination flags G1 and G2, and controls the indoor units 30 belonging to the corresponding group to the operation stopped state when the driving availability determination flag G1 or G2 is not set. . For example, when the driving propriety determination flag G1 is not set, the indoor units 30a and 30b belonging to the group 1 are controlled to be stopped. Further, when the driving propriety determination flag G2 is not set, the indoor units 30c and 30d belonging to the group 2 are controlled to be in a driving stop state.

  The “operation stop state” of the indoor unit 30 is a state in which the indoor expansion valve 32 is controlled to the minimum opening (fully closed) and the driving of the indoor fan 33 is stopped. Further, in order to “control the indoor unit 30 to the operation stop state”, when the indoor unit 30 is in the stop state, the operation is not started even if the operation start signal is input, or the indoor unit 30 is in the operation state. The case includes stopping the operation even when the operation stop signal is not input.

(4-6) Driving permission unit 76
The operation permission unit 76 is a functional unit that determines whether to permit the operation of the indoor unit 30 for each group. The operation permission unit 76 refers to the state determination flags 71a and 71b of the storage unit 71, determines whether to permit the operation of the indoor unit 30 based on the state of the state determination flags 71a and 71b, and according to the situation. The driving permission / prohibition determination flag G1 or G2 is set.

  For example, when the state determination flag 71a is not set, the driving permission unit 76 does not set or cancels the driving permission determination flag G1 to prohibit the operation of the indoor units 30a and 30b belonging to the group 1. In addition, when the state determination flag 71b is not set, the driving permission unit 76 does not set or cancels the driving propriety determination flag G2 to prohibit the operation of the indoor units 30c and 30d belonging to the group 2.

(4-7) Forced ventilation control unit 77
The forced ventilation control unit 77 is a functional unit that forcibly drives the ventilation device 40 installed in the target space SP when refrigerant leakage occurs in the target space SP.

  The forced ventilation control unit 77 appropriately refers to the refrigerant leakage determination flags Fa and Fb, and transmits a forced ventilation signal to the corresponding adapter unit 50 when the refrigerant leakage determination flag Fa or Fb is set.

  Specifically, in the process of the forced ventilation control unit 77, the refrigerant leakage determination flag Fa and the first adapter unit 50a are associated with each other. When the refrigerant leakage determination flag Fa is set, the forced ventilation control unit 77 A forced ventilation signal is transmitted to the first adapter unit 50a. As a result, when refrigerant leakage occurs in the target space SP1, the supply fan 43 and the exhaust fan 44 of the ventilation device 40a are driven at the maximum rotation speed (maximum air volume) (that is, forced ventilation operation is performed).

  Further, in the processing of the forced ventilation control unit 77, the refrigerant leakage determination flag Fb and the second adapter unit 50b are associated with each other. When the refrigerant leakage determination flag Fb is set, the forced ventilation control unit 77 sets the second adapter unit 50b. A forced ventilation signal is transmitted to the unit 50b. As a result, when refrigerant leakage occurs in the target space SP2, the supply fan 43 and the exhaust fan 44 of the ventilation device 40b are driven at the maximum rotation speed (maximum air volume) (that is, forced ventilation operation is performed).

(4-8) Display control unit 78
The display control unit 78 generates display information to be displayed to the system administrator according to the situation, and displays it on the corresponding output unit (here, the remote control display unit 38 or the display unit 393 of the centralized management device 39). .

  For example, when the air conditioner 10 is in the operating state, the display control unit 78 generates display information for displaying the operation information (the set temperature, the set air volume, or the wind direction) of the indoor unit 30 that is driving. The information is displayed on the remote control display unit 38 of the corresponding remote control 35.

  In addition, the display control unit 78 appropriately refers to the driving propriety determination flags G1 and G2, and generates display information corresponding to the states of the driving propriety determination flags G1 and G2. For example, the display control unit 78 generates display information indicating that the operation of the indoor units 30 of the group 1 is prohibited when the driving availability determination flag G1 is not set, and the remote control display unit 38 of the remote control 35a and The information is displayed on the display unit 393 of the central management device 39. Further, the display control unit 78 generates display information indicating that the operation of the indoor units 30 in the group 2 is prohibited when the driving availability determination flag G2 is not set, and the remote control display unit 38 of the remote control 35b and the remote control display unit 38b. The information is displayed on the display unit 393 of the central management device 39.

  Further, the display control unit 78 refers to the state determination flags 71a and 71b as appropriate, and generates display information corresponding to the states of the state determination flags 71a and 71b. For example, when the state determination flag 71a is not set, the display control unit 78 is in a state where the ventilation device 40a cannot be normally controlled in the group 1 (target space SP1) (that is, communication with the ventilation device 40a is normally performed). Display information indicating that the ventilation device 40a cannot be performed or the ventilation device 40a does not operate normally is generated and displayed on the remote control display unit 38 of the remote control 35a and the display unit 393 of the centralized management device 39. Further, when the state determination flag 71b is not set, the display control unit 78 is in a state where the ventilation device 40b cannot be normally controlled in the group 2 (target space SP2) (that is, the communication with the ventilation device 40b is normally performed). Display information indicating that it cannot be performed or the ventilation device 40b does not operate normally) is generated and displayed on the remote control display unit 38 of the remote control 35b and the display unit 393 of the centralized management device 39.

  Further, the display control unit 78 appropriately refers to the refrigerant leakage determination flags Fa and Fb, and generates display information corresponding to the state of the refrigerant leakage determination flag Fa or Fb. For example, when the refrigerant leakage determination flag Fa is set, the display control unit 78 generates display information indicating that refrigerant leakage has occurred in the target space SP1, and the remote control display unit 38 and the centralized management device of the remote controller 35a. 39 is displayed on the display unit 393. Further, when the refrigerant leakage determination flag Fb is set, the display control unit 78 generates display information indicating that refrigerant leakage has occurred in the target space SP2, and the remote control display unit 38 and the centralized management device of the remote control 35b. 39 is displayed on the display unit 393.

(5) Process Flow of Controller 70 FIG. 7 is a flowchart showing an example of the process flow of the controller 70.

  For example, the controller 70 performs control according to the following flow. Note that the following processing flow is an example, and can be changed as appropriate.

  In step S201, the controller 70 determines whether or not a grouping setting has been input by the system administrator. When the determination is NO (that is, when the grouping setting is not input by the system administrator), the process proceeds to step S203. On the other hand, when the determination is YES (that is, when the grouping setting is input by the system administrator), the process proceeds to step S202.

  In step S202, the controller 70 generates (or updates) the grouping table TB1 based on the input system administrator grouping settings. Thereafter, the process proceeds to step S203.

  In step S203, the controller 70 determines whether or not refrigerant leakage has occurred. When the determination is NO (that is, when refrigerant leakage has occurred), the process proceeds to step S204. On the other hand, when the determination is YES (that is, when there is no refrigerant leakage), the process proceeds to step S205.

  In step S204, the controller 70 operates the indoor fan 33 of the indoor unit 30 in the target space SP where the refrigerant leakage has occurred at the maximum rotation speed (maximum air volume). Moreover, the controller 70 controls the other actuators of the air conditioner 10 to a stopped state. In addition, the controller 70 transmits a forced ventilation operation start signal to the corresponding adapter unit 50 to operate the ventilation device 40 installed in the target space SP where refrigerant leakage occurs at the maximum rotation speed (maximum air volume). . In addition, the controller 70 displays on the remote control display unit 38 of the remote control 35 and the display unit 393 of the centralized management device 39 that the refrigerant leakage has occurred. Thereafter, the state is continued until it is canceled by the system administrator.

  In step S205, the controller 70 determines whether or not the status notification signal is normally received. When the determination is NO (that is, when the state notification signal has never been received, or when a new state notification signal is not received for a predetermined time t2 or more after receiving the state notification signal), the process proceeds to step S206. On the other hand, when the determination is YES (that is, when the state notification signal is normally received), the process proceeds to step S207.

  In step S206, the controller 70 creates a room in the target space SP in which the adapter unit 50 to which the state notification signal is not normally transmitted is installed (that is, the target space SP in a state in which the ventilation device 40 cannot be normally controlled). The operation of the unit 30 is prohibited (that is, the operation is not started for the indoor unit 30 in the stopped state, and the operation is stopped for the indoor unit 30 in the operated state). In addition, the controller 70 displays information for specifying the target space SP in a state where the ventilation device 40 cannot be normally controlled and information indicating that the operation of the indoor unit 30 is prohibited in the target space SP. The information is displayed on the display unit 38 and the display unit 393 of the centralized management device 39. Thereafter, the process proceeds to step S207.

  In step S207, the controller 70 determines whether or not an operation command has been input (that is, whether or not setting items such as an operation start instruction, an operation stop instruction, a set temperature specification, a set air volume specification, and a wind direction specification have been input). judge. When the determination is NO (that is, when an operation command is not input), the process returns to step S201. On the other hand, when the determination is YES (that is, when an operation command is input), the process proceeds to step S208.

  In step S208, the controller 70 determines whether or not the input operation command is an operation command related to the indoor unit 30 installed in the target space SP in a state where the ventilation device 40 cannot be normally controlled (that is, communication is normal). It is determined whether or not the operation command is related to the target space SP. When the determination is NO (that is, when the operation command is related to the target space SP in a state where the ventilation device 40 cannot be normally controlled), the process returns to step S201. On the other hand, if the determination is YES (that is, if the operation command is related to the target space SP in a state where the ventilation device 40 can be normally controlled), the process proceeds to step S209.

  In step S209, the controller 70 executes processing corresponding to the input operation command. Thereafter, the process returns to step S201.

(6) Processing in Air-Conditioning Ventilation System 100 FIG. 8 is a sequence diagram schematically illustrating an example of processing performed in the controller 70, the adapter unit 50 (50a or 50b), and the ventilation device 40 (40a or 40b). .

  As shown in the period of S1 in FIG. 8, in the air-conditioning ventilation system 100, the adapter unit 50 performs state determination periodically (every predetermined time t1 elapses). As a result of the state determination, the adapter unit 50 transmits a state notification signal to the controller 70 when it is determined that the ventilation device 40 is in a normally controllable state. Upon receiving the state notification signal, the controller 70 recognizes that the target space SP in which the transmission source adapter unit 50 is installed is in a state in which the ventilator 40 can be normally controlled, and the indoor unit 30 in the target space SP. Is permitted (that is, a driving propriety determination flag corresponding to the group to which the indoor unit 30 belongs is set).

  In S <b> 2 of FIG. 8, the state notification signal is not transmitted to the controller 70 because the ventilator 40 is not in a normally controllable state (the ventilator 40 does not normally respond to the command of the adapter unit 50). The situation is shown. As shown in the period of S2 in FIG. 8, in the air-conditioning ventilation system 100, after the controller 70 receives the state notification signal from the adapter unit 50, the state in which no new state notification signal is received is a predetermined time t2 (here, 30 seconds). ) When the above is continued, it is determined that the ventilation device 40 is in a state in which the ventilator 40 cannot be normally controlled in the target space SP in which the adapter unit 50 to which a new state notification signal has not been transmitted is installed. The operation of the indoor unit 30 is prohibited (that is, the operation availability determination flag corresponding to the group to which the indoor unit 30 belongs is not set or released). In addition, the controller 70 is in a state where the ventilator 40 cannot be normally controlled in the target space SP (that is, communication with the ventilator 40 cannot be performed normally or the ventilator 40 does not operate normally), and Display information for notifying the system administrator that the operation of the air conditioner 10 is prohibited is generated and displayed on the remote control display unit 38 and the display unit 393.

  As shown in the period of S3 in FIG. 8, in the air conditioning ventilation system 100, when the refrigerant leakage signal is transmitted from the refrigerant leakage sensor 60 (60a or 60b) to the controller 70, the controller 70 is the transmission source of the refrigerant leakage signal. In the target space SP in which the refrigerant leakage sensor 60 is installed (that is, the target space SP in which refrigerant leakage occurs), the indoor fan 33 is driven at the maximum rotation speed. Moreover, the drive of the other actuator of the air conditioner 10 is stopped, and the circulation of a refrigerant | coolant is stopped. In addition, the controller 70 transmits a forced ventilation signal to the adapter unit 50. The adapter unit 50 that has received the forced ventilation signal transmits a rotation speed control signal (specifying the rotation speed to the maximum) to the ventilation device 40. As a result, the ventilation device 40 drives both the air supply fan 43 and the exhaust fan 44 at the maximum rotation speed (maximum air volume), and ventilation is performed in the target space SP in which refrigerant leakage occurs. In addition, the controller 70 generates display information for notifying the system administrator that a refrigerant leak has occurred, and causes the remote controller display unit 38 and the display unit 393 to display the display information. Such a state continues until it is canceled by an administrator or a service person.

(7) Features of air conditioning ventilation system 100 (7-1)
In the air conditioning ventilation system 100, the adapter unit 50 transmits a state notification signal (transmission signal) to the controller 70 at a predetermined timing, and can the controller 70 control the operation of the ventilator 40 based on the received state notification signal? If it is determined that the operation of the ventilator 40 cannot be controlled, predetermined information is output to the remote control display unit 38 and the display unit 393. Thereby, when operation of ventilator 40 is not controllable (for example, when ventilator 40 is not installed appropriately in object space SP, or when communication between ventilator 40 and adapter unit 50 is not normally performed). Or when the ventilator 40 does not operate mechanically normally), it is possible to notify the system administrator to that effect. As a result, if it is assumed that ventilation will not be performed reliably when refrigerant leakage occurs, the system administrator can recognize that the safety against refrigerant leakage is not secured. It is possible to do. Therefore, security against refrigerant leakage is improved.

  In particular, here, since the refrigerant sealed in the refrigerant circuit RC has slight flammability, flammability, or toxicity, measures such as operating the ventilation device 40 when the refrigerant leaks into the target space SP must be taken. If the concentration exceeds the flammable concentration or toxicity limit concentration, there is a risk of ignition or poisoning. However, in the above embodiment, when the indoor multi-type air conditioner 10 is installed, if it is not certain that ventilation is performed by the operation of the ventilation device 40 when the refrigerant leaks at the installation site, the remote control display unit 38 and the display unit 393 display information indicating the facts, so that the system administrator can grasp that the safety against refrigerant leakage is not ensured, and an ignition accident or poisoning accident due to refrigerant leakage occurs. It can be handled before it occurs.

(7-2)
In the air conditioning ventilation system 100, the adapter unit 50 is configured to periodically transmit a status notification signal to the controller 70. The controller 70 determines that the ventilator 40 cannot be controlled when it does not receive the state notification signal for a predetermined time or longer. Thereby, it is possible to determine whether or not the controller 70 can control the operation of the ventilation device 40 with an easy and simple configuration. Therefore, the security against refrigerant leakage is improved while the cost is suppressed.

(7-3)
In the air conditioning ventilation system 100, the adapter unit 50 controls the start / stop or rotation speed of the air supply fan 43 and the exhaust fan 44 based on a control signal transmitted from the controller 70. The adapter unit 50 is configured not to transmit a state notification signal to the controller 70 when the rotational speed of the ventilation device 40 does not match the control signal. Thereby, it is possible to determine whether or not the controller 70 can control the operation of the ventilation device 40 with an easy and simple configuration. Therefore, the security against refrigerant leakage is improved while the cost is suppressed.

(7-4)
In the air-conditioning ventilation system 100, the controller 70 prohibits the operation of the air-conditioning apparatus 10 when the controller 70 determines that the operation of the ventilation apparatus 40 cannot be controlled based on the received state notification signal (that is, the operation is stopped). The operation of the air conditioner 10 is not started, or the operation of the air conditioner 10 in the operating state is stopped).

  Thereby, when operation of ventilator 40 is not controllable (for example, when ventilator 40 is not installed appropriately in object space SP, or when communication between ventilator 40 and adapter unit 50 is not normally performed). The air conditioner 10 is not operated when the ventilation device 40 is not mechanically operated normally. That is, the air conditioner 10 is operated only when the operation of the ventilation device 40 can be normally controlled. As a result, in a situation where it is not assumed that ventilation is performed reliably when refrigerant leakage occurs, the air conditioner 10 is not operated, and security against refrigerant leakage is reliably ensured.

  In particular, here, since the refrigerant sealed in the refrigerant circuit RC has slight flammability, flammability, or toxicity, measures such as operating the ventilation device 40 when the refrigerant leaks into the target space SP must be taken. If the concentration exceeds the flammable concentration or toxicity limit concentration, there is a risk of ignition or poisoning. However, in the above-described embodiment, when the indoor multi-type air conditioner 10 is installed, the air conditioner 10 is limited to a state in which ventilation is performed by the operation of the ventilator 40 when the refrigerant leaks at the installation site. Therefore, the occurrence of ignition accidents and poisoning accidents due to refrigerant leakage is reliably suppressed.

(8) Modifications The above embodiment can be appropriately modified as shown in the following modifications. Each modification may be applied in combination with another modification as long as no contradiction occurs.

(8-1) Modification A
In the above embodiment, the case where the target space SP is two (SP1 and SP2) has been described. However, there may be three or more target spaces SP, or one.

  In addition, two indoor units 30 and one ventilator 40 are installed in the target space SP. However, the number of indoor units 30 installed in the target space SP may be one, or may be three or more. Further, the number of ventilation devices 40 installed in the target space SP may be two or more. In such a case, the adapter unit 50 may be installed as appropriate according to the number of ventilation devices 40.

(8-2) Modification B
In the above embodiment, the ventilation device 40 has two ventilation fans (the supply fan 43 and the exhaust fan 44). However, the ventilator 40 does not necessarily have two ventilation fans. That is, the ventilation device 40 may have only one ventilation fan. In such a case, one of the air flow paths (the supply flow path 41a and the exhaust flow path 41b) in the main body frame 41 may be omitted.

  Moreover, although the ventilation apparatus 40 included the heat exchanger 42, about the heat exchanger 42, it is not necessarily required and can be abbreviate | omitted suitably.

  Moreover, although the sirocco fan was employ | adopted as a ventilation fan, other fans, such as a propeller fan, may be employ | adopted as a ventilation fan, for example.

  Moreover, the ventilation apparatus 40 does not necessarily need to be installed in the ceiling space of the target space SP, and the installation mode is not particularly limited as long as the target space SP can be ventilated. For example, the ventilator 40 may be installed behind the wall or under the floor of the target space SP. The ventilation device 40 may be installed in a machine room or the like that communicates with the target space SP through a duct or the like.

(8-3) Modification C
In the said embodiment, the ventilator 40 had the fan drive control part 45 containing an inverter. However, in the ventilation device 40, the fan drive control unit 45 does not necessarily include an inverter. That is, a device that cannot adjust the rotation speed of the ventilation fan may be employed as the ventilation device 40. In such a case, the rotation speed control signal is a signal for switching on and off of the ventilation device 40.

(8-4) Modification D
The air-conditioning ventilation system 100 of the above embodiment may be configured like the air-conditioning ventilation system 200 shown in FIG. Hereinafter, the air conditioning ventilation system 200 will be described. In addition, description is abbreviate | omitted about the part which is common in the air-conditioning ventilation system 100. FIG.

  In the air conditioning ventilation system 200, a ventilation device 80 (80a and 80b) is arranged instead of the ventilation device 40 (40a and 40b), and an adapter unit 90 (90a and 90b) is arranged instead of the adapter unit 50 (50a and 50b). Has been.

  The ventilation device 80 includes one ventilation fan 81 and a ventilation fan motor 81 a corresponding to a drive unit of the ventilation fan 81. The ventilation fan 81 has a drive circuit 82 (fan drive control unit) for the ventilation fan motor 81a.

  The adapter unit 90 is disposed between the commercial power source 5 and the ventilator 80 and is connected in series with the commercial power source 5 and the ventilator 80. That is, the adapter unit 90 is disposed on a power supply line that connects the commercial power supply 5 and the ventilation device 80.

  The adapter unit 90 includes a switching unit 91 that cuts off the power supplied from the commercial power supply 5 to the ventilation fan motor 81a. The switching unit 91 is a semiconductor switch such as a transistor, an electromagnetic relay, or the like. The adapter unit 90 includes a switching control unit 92 that supplies a driving voltage to the switching unit 91 to switch between opening and closing of the switching unit 91.

  In the air-conditioning ventilation system 200, the state of the switching unit 91 is switched in the adapter unit 90, thereby switching between conduction and interruption of the power supply line to the ventilation device 80 and switching of the ventilation fan 81. Specifically, the adapter unit 90 controls the switching unit 91 to be closed when a command for starting the ventilation operation is input from the system administrator or the controller 70 and when a forced ventilation operation start signal is received from the controller 70. Then, the ventilation fan 81 is driven.

  In the case of such an air-conditioning ventilation system 200, it becomes easier to newly add an adapter unit 90 as a ventilation control unit in the air-conditioning ventilation system after construction. That is, the present invention can be applied to a ventilator 80 that does not have a connection terminal 451 such as the ventilator 40, and in an air-conditioning ventilation system after construction, the adapter unit as a ventilation control unit is not limited to the type of the ventilator. It becomes easy to add 90 newly.

  In the air conditioning ventilation system 200, the switching unit 91 of the adapter unit 90 is disposed between the commercial power supply 5 and the drive circuit 82. However, the drive circuit 82 and the ventilation fan are interposed between the drive circuit 82 and the ventilation fan motor 81a. You may arrange | position in series with the motor 81a.

(8-5) Modification E
The air-conditioning ventilation system 100 of the above embodiment may be configured as an air-conditioning ventilation system 300 shown in FIG.

  In the air conditioning ventilation system 300, the indoor unit control unit 34 (controller 70) and the adapter unit 50 are not connected by a communication line, and signals are transmitted and received by so-called wireless communication using radio waves or infrared rays. About another part, it is substantially the same as the air-conditioning ventilation system 100. FIG.

  In the case of such an air conditioning and ventilation system 300, it is not necessary to route a communication line that connects the indoor unit control unit 34 and the adapter unit 50 in the target space SP, so that it is easy to construct the network NW.

(8-6) Modification F
In the above embodiment, the predetermined time t1 is set to 1 min, and the predetermined time t2 is set to 3 min. However, the predetermined times t1 and t2 are not necessarily limited to this, and can be changed as appropriate. For example, the predetermined time t1 may be set to 30 sec or may be set to 10 min. The predetermined time t2 may be set to 1.5 min or 30 min.

(8-7) Modification G
In the above embodiment, an independent remote controller that switches the start and stop of the ventilation device 40 and the rotation speed is not installed, but such a remote controller may be installed separately. Further, the adapter unit 50 may be provided with such functions related to the remote control.

(8-8) Modification H
In the above embodiment, one refrigerant leakage sensor 60 is installed in the target space SP. However, the present invention is not limited to this, and two or more refrigerant leakage sensors 60 may be arranged in the target space SP.

  Moreover, as long as the refrigerant | coolant leak sensor 60 is arrange | positioned in the position which can detect the refrigerant | coolant leak in object space SP, it will not specifically limit about an arrangement | positioning aspect. For example, the refrigerant leak sensor 60 may be disposed in the indoor unit 30, may be disposed in the remote controller 35, may be disposed in the ventilation device 40, or may be disposed in the adapter unit 50.

(8-9) Modification I
In the above embodiment, the adapter unit 50 is arranged independently in the target space SP. However, as long as the adapter unit 50 can communicate with the ventilation device 40 and the controller 70, the arrangement mode is not particularly limited. For example, the adapter unit 50 may be disposed in the outdoor unit 20, may be disposed in the indoor unit 30, may be disposed in the remote controller 35, or may be disposed in the centralized management device 39. Moreover, you may arrange | position in the ventilation apparatus 40. FIG.

  Further, the adapter unit 50 may be independently arranged in a remote place away from the target space SP. In such a case, the adapter unit 50 may be connected to the ventilation device 40 and the controller 70 via a network such as a LAN or a WAN.

(8-10) Modification J
In the above embodiment, two groups (group 1 and group 2) are configured in the grouping table TB1, and each group includes two indoor units 30, one ventilator 40, and one refrigerant leak sensor 60. And was included. However, the number of groups configured in the grouping table TB1 is not particularly limited, and may be one or three or more. In addition, the numbers of indoor units 30, ventilation devices 40, and refrigerant leakage sensors 60 included in the group are not particularly limited, and can be changed as appropriate.

(8-11) Modification K
In the above embodiment, the case where the air conditioning ventilation system 100 is configured by additionally installing the adapter unit 50 in the target space SP in which the air conditioning apparatus 10 and the ventilation apparatus 40 are already installed has been described. However, the present invention is not limited to this, and when the air conditioner 10 and the ventilator 40 are newly installed in the target space SP, the adapter unit 50 may also be installed to configure the air conditioning ventilating system 100. It is.

(8-12) Modification L
In the above embodiment, the adapter unit 50 determines whether the operation of the ventilator 40 with respect to the drive command or the rotation speed control signal is normal in the state determination (that is, receives the drive command when in the stopped state and is normal. Whether or not the ventilator 40 can be controlled normally depending on whether or not it is driven, or whether or not the rotation speed of the air supply fan 43 or the exhaust fan 44 matches the latest rotation speed control signal transmitted). I was judging.

  However, the present invention is not limited to this, and the adapter unit 50 periodically transmits a transmission signal to the ventilation device 40 as a process related to the state determination, and when there is a response of the ventilation device 40 to the transmission signal, Communication with the ventilator 40 is not normally possible when it is determined that the communication of the ventilator 40 is normally possible and there is no response of the ventilator 40 to the transmission signal even if the transmission signal is transmitted a predetermined number of times (eg, three times) You may comprise so that it may determine with being in the state (that is, the ventilation apparatus 40 cannot be controlled normally).

  Further, when a sensor such as a temperature sensor (not shown) is arranged in the ventilator 40, communication with the ventilator 40 is normally performed when the adapter unit 50 can normally receive the detection result of the sensor. It may be configured that it is determined that it is possible to determine that communication with the ventilator 40 is not normally possible (that is, the ventilator 40 cannot be normally controlled) when reception is not possible normally.

(8-13) Modification M
In the above-described embodiment, the controller 70 includes the group setting unit 74 and is configured to perform group control with respect to the devices (such as the indoor unit 30 and the ventilator 40) included in the air-conditioning ventilation system 100. However, in the air-conditioning ventilation system 100, group control is not necessarily required, and the group setting unit 74 can be omitted.

(8-14) Modification N
The air-conditioning ventilation system 100 of the above embodiment may be configured as an air-conditioning ventilation system 500 shown in FIG. Hereinafter, the air conditioning ventilation system 500 will be described. In addition, description is abbreviate | omitted about the part which is common in the air-conditioning ventilation system 100. FIG.

  FIG. 11 is a schematic diagram illustrating a refrigerant circuit RC and a transmission path configured in the air conditioning ventilation system 500.

  In the air-conditioning ventilation system 500, adapter units 95 (95a and 95b) are arranged instead of the adapter units 50 (50a and 50b). Further, in the air conditioning ventilation system 500, the indoor unit control unit 34 (controller 70) and the adapter unit 95 are not connected by a communication line and perform so-called wireless communication using radio waves or infrared rays.

  In the air conditioning ventilation system 500, the adapter unit 95 transmits a signal (status notification signal) to the indoor unit controller 34 (controller 70), and the indoor unit controller 34 (controller 70) receives the signal transmitted by the adapter unit 95. No signal is transmitted to the adapter unit 95 alone. That is, in the air-conditioning ventilation system 500, communication between the indoor unit control unit 34 (controller 70) and the adapter unit 95 is not bidirectional as in the air-conditioning ventilation system 100, but in one direction.

  In the air conditioning ventilation system 500, the refrigerant leakage sensor 60 is not connected to the indoor unit control unit 34 (controller 70), but is electrically connected to the adapter unit 95.

  In the air-conditioning ventilation system 500, the adapter unit 95 is provided with a reception unit (not shown) that receives a command from the system administrator, and the adapter unit 95 determines the start / stop and rotation speed of the ventilation device 40 based on the command received by the reception unit. Control.

  The air-conditioning ventilation system 500 configured as described above can also achieve the same effect as the present invention.

  That is, when the operation of the ventilator 40 is not controllable (for example, when the ventilator 40 is not properly installed in the target space SP, or when communication between the ventilator 40 and the adapter unit 50 is not normally performed) Alternatively, when the ventilator 40 does not operate mechanically normally), it is possible to notify the system administrator of that fact. As a result, if it is assumed that ventilation will not be performed reliably when refrigerant leakage occurs, the system administrator can recognize that the safety against refrigerant leakage is not ensured, and the countermeasures can be taken. It becomes possible. In particular, when the indoor multi-type air conditioner 10 is installed, if it is not certain that ventilation is performed by operation of the ventilator 40 when refrigerant leaks at the installation site, the remote control display unit 38 and the display unit 393 are used. Since the information indicating the fact is displayed, it is possible for the system administrator to grasp that the safety against the refrigerant leakage is not ensured, and to respond before the ignition accident or the poisoning accident due to the refrigerant leakage occurs.

  In addition, the adapter unit 95 periodically transmits a state notification signal in a state in which the ventilator 40 can be normally controlled. Thus, when the controller 70 does not receive the state notification signal, the controller 70 normalizes the state notification signal. The operation of the indoor unit 30 (air conditioner 10) is prohibited (that is, the operation is not performed) in the target space SP in which the adapter unit 95 that has not been transmitted to (that is, the target space SP in which the operation of the ventilation device 40 cannot be normally controlled) is installed. Do not start or stop operation). As a result, the air conditioner 10 is operated only when the operation of the ventilator 40 can be controlled regardless of whether or not the ventilator 40 is installed independently of the air conditioner 10 in the target space SP. . That is, the air conditioner 10 is not operated in a situation where it is not assumed that ventilation is performed reliably when refrigerant leakage occurs. Therefore, the security against refrigerant leakage is reliably ensured.

  In the air-conditioning ventilation system 500, functional units corresponding to the forced ventilation control unit 77 and the refrigerant leakage determination flags (Fa and Fb) of the controller 70 are provided in the adapter unit 95, and the adapter unit 95 is a refrigerant in the target space SP. Control the forced ventilation when a leak occurs.

  That is, in the air conditioning ventilation system 500, when the refrigerant leakage sensor 60 detects refrigerant leakage, the refrigerant leakage sensor 60 transmits a refrigerant leakage signal not to the controller 70 but to the connected adapter unit 95. When the adapter unit 95 receives the refrigerant leakage signal, the adapter unit 95 drives the corresponding ventilation device 40 at the maximum number of rotations (maximum air volume). As a result, the air conditioning ventilation system 500 also performs forced ventilation operation when refrigerant leakage occurs in the target space SP.

  In the air conditioning and ventilation system 500, the indoor unit controller 34 (controller 70) and the adapter unit 95 may be connected by a communication line so that wired communication is performed instead of wireless communication.

(8-15) Modification O
In the said embodiment, the adapter unit 50 was comprised so that communication with the controller 70 was possible by connecting with the indoor unit control part 34 by communication line CB1 or CB2. However, the adapter unit 50 communicates with the controller 70 by being connected to other elements of the controller 70 (such as the remote control unit 36, the outdoor unit control unit 26, or the centralized management control unit 391) via a wired or wireless network. It may be configured to.

(8-16) Modification P
In the above embodiment, the remote control 35 has the remote control display unit 38 as an output unit, and the centralized management device 39 has the display unit 393 as an output unit. However, the present invention is not limited to this, and the remote controller 35 and / or the centralized management device 39 can be used as an output unit in addition to the remote control display unit 38 or the display unit 393 (or in place of the remote control display unit 38 or the display unit 393). You may comprise so that it may have a speaker which can output. In addition, when the controller 70 determines that the operation of the ventilation device 40 cannot be controlled based on the received state notification signal or when refrigerant leakage occurs, the system management is performed by causing the speaker to output predetermined information. You may comprise so that it may alert | report to that.

(8-17) Modification Q
In the above embodiment, when the controller 70 determines that the operation of the ventilator 40 cannot be controlled based on the received state notification signal, and when refrigerant leakage occurs, the controller 70 displays a predetermined value on the remote control display unit 38 and the display unit 393. Information was output. However, the present invention is not limited to this, and when the controller 70 determines that the operation of the ventilation device 40 cannot be controlled or when refrigerant leakage occurs, the controller 70 outputs predetermined information to both the remote control display unit 38 and the display unit 393. Instead of this, the configuration may be such that only one side outputs predetermined information.

  Further, when an output unit such as a display or a speaker is provided in the adapter unit 50 or the refrigerant leakage sensor 60 and the controller 70 determines that the operation of the ventilation device 40 cannot be controlled, or when refrigerant leakage occurs, the output concerned You may comprise so that a predetermined information may be output to a part.

  In addition, an output unit such as an independent display display or a speaker is provided, and when the controller 70 determines that the operation of the ventilation device 40 cannot be controlled or when refrigerant leakage occurs, predetermined information is output to the output unit. You may comprise.

(8-18) Modification R
In the above embodiment, when the controller 70 determines that the operation of the ventilation device 40 cannot be controlled based on the received state notification signal, the controller 70 prohibits the operation of the air conditioner 10 (that is, the air conditioner in the operation stop state). 10 is not started, or the operation of the air conditioner 10 in the operating state is stopped). However, when the controller 70 determines that the operation of the ventilation device 40 cannot be controlled, it is not always necessary to prohibit the operation of the air conditioner 10.

  That is, in the air conditioning ventilation system 100, when the controller 70 determines that the operation of the ventilation device 40 cannot be controlled based on the received state notification signal, the remote control display unit 38 and the display unit 393 output predetermined information. If it is configured, when the operation of the ventilator 40 cannot be controlled, it is possible to notify the system administrator to that effect. As a result, if it is assumed that ventilation will not be performed reliably when refrigerant leakage occurs, the system administrator can recognize that the safety against refrigerant leakage is not ensured, and the countermeasures can be taken. It becomes possible. Therefore, security against refrigerant leakage is improved.

(8-19) Modification S
In the above embodiment, the adapter unit 50 does not transmit the state notification signal to the indoor unit control unit 34 when it is determined that the ventilation device 40 is not in a mechanically normal operating state as a result of the state determination. Was composed. That is, the adapter unit 50 is configured not to transmit a state notification signal to the controller 70 when the rotational speed of the ventilation device 40 does not match the control signal.

  However, the present invention is not limited to this, and when the adapter unit 50 determines that the ventilation device 40 is not in a mechanically normal operating state as a result of the state determination (more specifically, the communication with the ventilation device 40 is normal). If it is determined that the ventilator 40 is not in a mechanically normal state), a state notification signal may be transmitted to the indoor unit control unit 34. However, in such a case, the adapter unit 50 generates and transmits a state notification signal including information (rotational speed information) regarding the detected rotational speed (air volume) of the air supply fan 43 and the exhaust fan 44.

  Then, a determination unit corresponding to the state determination unit 55 is provided in the controller 70, and when the determination unit does not match the rotation speed information of the supply fan 43 and the exhaust fan 44 included in the state notification signal with the latest control signal. What is necessary is just to comprise so that the state determination flag (71a or 71b) corresponding to the adapter unit 50 of the transmission source of the said state alerting signal may be cancelled | released when it determines. That is, in such a case, the controller 70 determines whether or not the rotational speed of the ventilator 40 matches the transmitted control signal based on the received state notification signal, and the rotational speed of the ventilator 40 is used as the control signal. If not, it is determined that the ventilator cannot be controlled, and predetermined information is output to the remote control display unit 38 or the display unit 393 and the operation of the air conditioner 10 is prohibited.

  Even if the air-conditioning ventilation system 100 is configured in this manner, the same effects as those of the above-described embodiment can be obtained.

  The present invention is applicable to an air conditioning ventilation system having an air conditioning device and a ventilation device.

5: Commercial power supply 10: Air conditioner 20: Outdoor unit 26: Outdoor unit control unit 30 (30a-30d): Indoor unit 34: Indoor unit control unit 35 (35a, 35b): Remote control 36: Remote control unit 37: Remote control input Part 38: Remote control display part (output part)
39: Centralized management equipment 40 (40a, 40b), 80: Ventilation device 41: Main body frame 41a: Air supply passage 41b: Exhaust passage 42: Heat exchanger 43: Air supply fan (ventilation fan)
43a: Air supply fan motor 44: Exhaust fan (ventilation fan)
44a: Exhaust fan motor 45: Ventilation fan control unit 50, 90: Adapter unit (ventilation control unit)
50a: first adapter unit 50b: second adapter unit 51: adapter unit storage unit 51a: operation command determination flag 51b: air volume determination flag 52: adapter unit communication unit 53: adapter unit input unit 54: adapter unit control unit 55: state Determination unit 60: refrigerant leakage sensor 60a: first refrigerant leakage sensor 60b: second refrigerant leakage sensor 70: controller 71: storage units 71a, 71b: state determination flag 72: communication unit 73: input control unit 74: group setting unit 75 : Actuator control unit 76: Operation permission unit 77: Forced ventilation control unit 78: Display control unit 81: Ventilation fan 81a: Ventilation fan motor 82: Drive circuit 91: Switching unit 92: Switching control unit 100, 200, 300, 500: Air-conditioning ventilation system 391: Centralized control unit 92: input section 393: a display unit (output section)
401: Intake duct 402: Supply duct 403: Extraction duct 404: Exhaust duct 411: Electrical component box 451: Connection terminal CB1, CB2: Communication line EA: Exhaust air Fa, Fb: Refrigerant leakage determination flags G1, G2: Operation Judgment flag GP: Gas communication pipe LP: Liquid communication pipe NW: Network (communication network)
OA: outdoor air RA: indoor air RC: refrigerant circuit SA: supply air SP (SP1, SP2): target space t2: predetermined time TB1: grouping table

JP 2001-74283 A

Claims (6)

An outdoor unit (20) and a plurality of indoor units (30) that constitute a refrigerant circuit (RC) together with the outdoor unit and are installed in the target space (SP), and circulate the refrigerant in the refrigerant circuit during operation. An air conditioner (10) for cooling or heating the target space,
A plurality of ventilation devices (40, 80) including ventilation fans (43, 44, 81) for ventilation, installed in the target space, and grouped together with the plurality of indoor units (30) ;
A controller (70) for controlling the operation of the air conditioner;
A ventilation control unit (50) electrically connected to the ventilator to control the operation of the ventilator and to communicate with the controller via a communication network (NW);
An output unit (38, 393) for outputting information to a system administrator;
With
The ventilation control unit transmits a transmission signal to the controller at a predetermined timing,
The controller is
Based on the received transmission signal, periodically determine whether it is possible to control the operation of the ventilator,
If it is determined that the operation of the ventilator is not controllable, the output unit outputs predetermined information.
Air conditioning system (100, 200, 300, 500). The ventilation control unit periodically transmits the transmission signal to the controller,
When the controller does not receive the transmission signal for a predetermined time (t2) or more, the controller determines that the ventilator cannot be controlled.
The air conditioning system (100, 200, 300, 500) according to claim 1. The controller determines that the ventilator cannot be controlled when the new transmission signal is not received for the predetermined time (t2) or more from the previous reception of the transmission signal.
The air conditioning system (100, 200, 300, 500) according to claim 2. The ventilation control unit
Based on the control signal transmitted from the controller, the start / stop or rotation speed of the ventilation fan is controlled,
If the rotation speed of the ventilation device does not match the control signal, the transmission signal is not transmitted to the controller.
The air conditioning system (100, 200, 300, 500) according to any one of claims 1 to 3. The ventilation control unit
Based on the control signal transmitted from the controller, the start / stop or rotation speed of the ventilation fan is controlled,
Rotational speed information notifying the rotational speed of the ventilation fan is included in the transmission signal and transmitted to the controller,
The controller is
Based on the transmission signal, it is determined whether or not the rotational speed of the ventilation device indicated in the received rotational speed information matches the control signal,
If the rotational speed of the ventilator does not match the control signal, it is determined that the ventilator cannot be controlled.
The air conditioning system (100, 200, 300, 500) according to any one of claims 1 to 3. When the controller determines that the operation of the ventilator cannot be controlled based on the received transmission signal, the controller prohibits the operation of the air conditioner.
The air conditioning system (100, 200, 300, 500) according to any one of claims 1 to 5.

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