JP2019183792A - Controller and air distribution system - Google Patents

Abstract

To provide a controller capable of controlling an operation of a blower by one of a main controller and a controller even when the other is failed, in an air distribution system having the controller connected to the main controller.SOLUTION: A sub-controller 20 is a controller capable of being connected with a main controller 10 generating a first control signal for collectively controlling operations of a plurality of blowers 30, and a blower 30 included in the plurality of blowers 30. The sub-controller 20 includes a signal generation portion 22 generating a second control signal for controlling the blower 30 connected to the sub-controller 20, and a switch 27 as a power source switching circuit for switching a connection destination of a power source line connected to a power source circuit 35 disposed in the blower 30, between the signal generation portion 22 and the main controller 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a controller for controlling the operation of a blower and a blower system having a blower.

  In a barn used for raising livestock, a blower may be installed for the purpose of measures against heat, measures against odor, or drying a rug. Patent Document 1 discloses a blower system having a main controller that collectively controls the operation of a plurality of blowers installed in a barn. The blower system of Patent Document 1 has a drive power supply that supplies power to a plurality of blowers and a main controller. Each blower and the main controller are connected in parallel to each other through a power line connected to a drive power source.

  Conventionally, in the air blowing system disclosed in Patent Document 1, a sub-controller, which is a controller for controlling the operation of the blower for each area, is provided in each of a plurality of areas in the barn, separately from the main controller. There is. The sub-controller is connected to the main controller and the blower in the area. The sub controller is provided with a switch for switching the control of the blower in the area between the control by the main controller and the control by the sub controller. By providing the sub-controller, the blower system can control the operation of the blower according to the situation in the area separately from the collective control of the blower in the entire barn.

JP 2004-190616 A

  In the conventional blower system described above, the main controller and the sub-controller can be operated to generate a control signal for controlling the operation of the blower by supplying power through a common power line connected to the blower power supply circuit. Sometimes it is said. In such a blower system, when a failure accompanied by a short circuit between the power supply line and the reference potential point occurs in the sub-controller, the power supply circuit of the blower decreases the output voltage in order to prevent overcurrent due to the short circuit. In this case, not only the operation of the sub controller that has caused the failure is stopped, but also the main controller that has not caused the failure cannot perform a normal operation due to a decrease in the power supply voltage. Similarly, when a failure involving a short circuit occurs in the main controller, the sub controller that does not have a failure cannot perform normal operation due to a decrease in the power supply voltage. For this reason, the conventional blower system has a problem that when a failure occurs in one of the main controller and the sub controller, the blower may not be able to operate even if the control is switched to the other. .

  The present invention has been made in view of the above, and in a blower system having a controller connected to a main controller, even if a failure occurs in one of the main controller and the controller, the operation of the blower can be controlled by the other. The purpose is to obtain a controller.

  In order to solve the above-described problems and achieve the object, a controller according to the present invention includes a main controller that generates a first control signal for collective control of operation of a plurality of fans and a fan included in the plurality of fans. It can be connected to the controller. A controller according to the present invention includes: a signal generation unit that generates a second control signal for controlling a blower connected to the controller; and a signal generation unit that connects a power supply line connected to a power supply circuit included in the blower. And a power supply switching circuit for switching between the main controller.

  According to the present invention, in a blower system having a controller connected to a main controller, there is an effect that even if a failure occurs in one of the main controller and the controller, the operation of the blower can be controlled by the other.

The figure which shows the structure of the ventilation system concerning Embodiment 1 of this invention. FIG. 1 is a block diagram showing a main controller, a sub controller, and a blower included in the blower system shown in FIG. The figure which shows the hardware constitutions in case the function of the control part which the sub controller shown in FIG. 2 has is implement | achieved by exclusive hardware. The figure which shows the hardware constitutions in case the function of the control part which the subcontroller shown in FIG. 2 has is implement | achieved by the processor which executes the program stored in memory FIG. 2 is a first explanatory diagram of switching of the sub-controller shown in FIG. 2nd explanatory drawing about the switch which the subcontroller shown in FIG. 2 has, and switching by a switch

  Hereinafter, a controller and a blower system according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration of a blower system 100 according to the first embodiment of the present invention. The air blowing system 100 is installed in a barn such as a cowshed, a pig house, or a poultry house. The blower system 100 sends out the air inside the barn to the outside of the barn and takes the air outside the barn into the barn, thereby ventilating the temperature inside the barn or discharging the odor inside the barn outside the barn. Ventilate for. The air blowing system 100 may perform air blowing for drying the rug. The blower system 100 may be installed in a facility other than a barn such as a gardening facility, a factory, or a warehouse.

  In the example shown in FIG. 1, the blower system 100 includes nine blowers 30-1, 30-2, 30-3, 30-4, 30-5, 30-6, 30-7, 30-8, and 30-9. And three sub-controllers 20-1, 20-2, 20-3, and one main controller 10. The blower 30 refers to each of the nine blowers 30-1, 30-2, ... 30-9 without distinction. The sub controller 20 refers to each of the three sub controllers 20-1, 20-2, and 20-3 without distinction.

  The blower system 100 includes a plurality of blowers 30 and a main controller 10 that can control the operations of the blowers 30 collectively. The blower system 100 includes a plurality of sub-controllers 20 that are controllers capable of controlling the operation of at least one of the blowers 30. Each sub-controller 20 is connected to the main controller 10 while being connected to the blower 30 that can control the operation. The blower 30 is installed by being installed on the wall surface of the barn or hanging from the ceiling of the barn. The plurality of blowers 30 are distributed and arranged in a plurality of areas in the barn.

  In the example illustrated in FIG. 1, the plurality of blowers 30 are distributed and arranged in three areas, ie, a first area, a second area, and a third area. The three blowers 30-1, 30-2, and 30-3 are arranged in the first area. The three blowers 30-4, 30-5, and 30-6 are disposed in the second area. The three blowers 30-7, 30-8, and 30-9 are arranged in the third area.

  The sub-controller 20-1 is connected to the fans 30-1, 30-2, 30-3 in the first area, and can control the operation of the fans 30-1, 30-2, 30-3. The sub-controller 20-2 is connected to the fans 30-4, 30-5, and 30-6 in the second area, and can control the operation of the fans 30-4, 30-5, and 30-6. The sub-controller 20-3 is connected to the fans 30-7, 30-8, and 30-9 in the third area, and can control the operation of the fans 30-7, 30-8, and 30-9.

  The blowers 30-1, 30-2, and 30-3 in the first area can be operated by the control of the main controller 10 and the operation by the control of the sub-controller 20-1. The blowers 30-3, 30-4, and 30-5 in the second area can be operated by the control of the main controller 10 and the operation by the control of the sub-controller 20-2. The blowers 30-7, 30-8, and 30-9 in the third area can be operated by the control of the main controller 10 and the operation by the control of the sub-controller 20-3. By providing the sub-controller 20, the blower system 100 enables operation control of the blower 30 according to the situation for each area, separately from the collective control of the blower 30 for the entire barn.

  The number of sub-controllers 20 in the blower system 100 can be arbitrarily set according to the number of areas in which the blower 30 is installed. The number of blowers 30 connected to one sub-controller 20 is arbitrary. The blower system 100 may include a blower 30 that is connected to the main controller 10 but not connected to the sub-controller 20. The blower 30 can only be controlled by the sub-controller 20.

  FIG. 2 is a block diagram illustrating the main controller 10, the sub-controller 20, and the blower 30 included in the blower system 100 illustrated in FIG. 1. The main controller 10 includes a control unit 11 that is a functional unit that controls the entire main controller 10. The control unit 11 includes a signal generation unit 12 that is a functional unit that generates the first control signal. The signal generator 12 is a first signal generator that generates a first control signal for collective control of the operation of the plurality of blowers 30. The main controller 10 includes a communication unit 13 that performs communication with the sub-controller 20. The communication unit 13 is an interface for connecting the main controller 10 and the sub-controller 20 so as to communicate with each other.

  The main controller 10 has an operation panel 14 for operating the blower 30 by the user of the blower system 100. The operation panel 14 is provided with buttons, switches, adjustment knobs, and the like, which are parts for operations such as operation of the blower 30 and instructions for stopping the operation, and adjustment of the air volume of the blower 30. In addition, the operation panel 14 has a part for instructing an operation mode such as whether or not to adjust the air volume based on temperature, or whether or not to perform an operation with the air volume suppressed, or a part for other operations. May be provided.

  The signal generator 12 generates a first control signal including an instruction based on an operation on the operation panel 14. The communication unit 13 transmits the first control signal generated by the signal generation unit 12 to the sub-controller 20.

  The main controller 10 includes a power feeding unit 15 that receives a direct current supplied to the main controller 10 by the power supply circuit 35 of the blower 30. The power supply unit 15 is a connector to which a power supply line through which a direct current flows is connected. The power feeding unit 15 is supplied with a direct current from the power supply circuit 35 via the power feeding unit 25 of the sub-controller 20. The power supply unit 15 supplies the direct current received from the power supply circuit 35 to each unit of the main controller 10.

  The sub-controller 20 includes a control unit 21 that is a functional unit that controls the entire sub-controller 20. The control unit 21 includes a signal generation unit 22 that is a functional unit that generates the second control signal. The signal generation unit 22 is a second signal generation unit that generates a second control signal for controlling the operation of the blower 30 in the area. The sub-controller 20 includes a communication unit 23 that performs communication with the main controller 10 and communication with the blower 30. The communication unit 23 is an interface for connecting the sub controller 20 and the main controller 10 so that they can communicate with each other, and is an interface for connecting the sub controller 20 and the blower 30 so that they can communicate with each other.

  The sub-controller 20 has an operation panel 24 for operating the blower 30 by the user. The operation panel 24 is provided with buttons, switches, adjustment knobs, and the like, which are parts for operations such as operation of the blower 30 and instruction to stop the operation, and adjustment of the air volume of the blower 30. In addition, the operation panel 24 has a part for instructing an operation mode such as whether or not to adjust the air volume based on temperature, or whether or not to perform an operation with the air volume suppressed, or a part for other operations. May be provided. Further, the operation panel 24 is provided with parts for switching between collective control of the blower 30 by the main controller 10 and control of the blower 30 for each area by the sub-controller 20.

  The signal generator 22 generates a second control signal including an instruction based on an operation on the operation panel 24. The switch 26 that is a signal switching circuit switches a signal transmitted to the control unit 31 of the blower 30 between the first control signal and the second control signal. The communication unit 23 receives the first control signal through communication with the main controller 10. The communication unit 23 transmits a first control signal or a second control signal that is a signal selected by the switch 26 to the blower 30.

  The sub-controller 20 includes a power supply unit 25 that receives a direct current supplied to the sub-controller 20 by the power supply circuit 35 of the blower 30. The power supply unit 25 is a connector to which a power line is connected. The power feeding unit 25 supplies the direct current received from the power supply circuit 35 to each unit of the sub-controller 20. The switch 27 that is a power supply switching circuit switches the connection destination of the power supply circuit 35 provided in the blower 30 between the signal generation unit 22 of the sub-controller 20 and the signal generation unit 12 of the main controller 10.

  The blower 30 includes a control unit 31 that is a functional unit that controls the entire blower 30 and a communication unit 33 that performs communication with the sub-controller 20. The blower 30 includes a fan 37 that generates an air flow by rotation, and a motor 36 that rotationally drives the fan 37 in accordance with control by the control unit 31. The communication unit 33 is an interface for connecting the blower 30 and the sub-controller 20 so as to communicate with each other.

  The blower 30 has a power supply circuit 35 that is a power supply of the blower 30. The power supply circuit 35 is connected to a commercial power supply that is an external power supply. In FIG. 2, the illustration of the commercial power source is omitted. The power supply circuit 35 converts an alternating current supplied from a commercial power supply into a direct current. The power supply circuit 35 supplies the generated direct current to the motor 36. The motor 36 rotationally drives the fan 37 when supplied with a direct current. In FIG. 2, a path of a direct current flowing from the power supply circuit 35 to the motor 36 is represented by an arrow. Note that the direct current generated by the power supply circuit 35 is also supplied to the communication unit 33 and the control unit 31. In FIG. 2, illustration of a path of a direct current flowing from the power supply circuit 35 to the communication unit 33 and the control unit 31 is omitted.

  The power supply circuit 35 supplies a direct current to the power supply unit 25 of the sub-controller 20. The path of the direct current supplied to the power supply unit 25 is switched by the switch 27 to a path toward each part of the sub-controller 20 and a path toward the power supply unit 15 of the main controller 10. In FIG. 2, a direct current path flowing from the power supply circuit 35 to the power supply unit 25, a direct current path flowing from the power supply unit 25 to the switch 27, and a direct current path flowing from the switch 27 to the power supply unit 15 are represented by arrows. ing. The power supply unit 15 supplies the direct current supplied from the power supply circuit 35 via the power supply unit 25 and the switch 27 to each unit of the main controller 10. The power supply unit 25 supplies the direct current supplied from the power supply circuit 35 to each unit of the sub-controller 20 via the switch 27. In FIG. 2, illustration of the path of the direct current flowing from the power feeding unit 15 to each part of the main controller 10 and the path of the direct current flowing from the switch 27 to each part of the sub-controller 20 are omitted.

  A three-terminal positive voltage power supply having an overcurrent protection circuit is used for the power supply circuit 35 of the blower 30. The overcurrent protection circuit has a function of protecting the power supply circuit 35 from an overcurrent caused by a short circuit in the load. The overcurrent protection circuit protects the power supply circuit 35 from failure by reducing the output voltage when a current having a current value higher than a certain value flows. Note that electronic components other than the three-terminal positive voltage power supply may be used for the power supply circuit 35.

  The sub-controller 20 receives power supply from the blower 30 in the area. For example, the sub-controller 20-1 illustrated in FIG. 1 receives power supply from the fans 30-1, 30-2, and 30-3. The sub-controller 20 may receive power supply from a representative machine that is one of the blowers 30 in the area. The main controller 10 can receive power supply from a plurality of blowers 30. The main controller 10 may receive power supply from the representative machine.

  The function of the control unit 21 of the sub-controller 20 is realized by a processing circuit. The processing circuit is dedicated hardware mounted on the sub-controller 20. The processing circuit may be a processor that executes a program stored in the memory.

  FIG. 3 is a diagram illustrating a hardware configuration in a case where the function of the control unit 21 included in the sub-controller 20 illustrated in FIG. 2 is realized by dedicated hardware. The processing circuit 41 which is dedicated hardware includes a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or these It is a combination.

  FIG. 4 is a diagram illustrating a hardware configuration when the function of the control unit 21 included in the sub-controller 20 illustrated in FIG. 2 is realized by the processor 42 that executes a program stored in the memory 43. The processor 42 and the memory 43 are connected to be able to communicate with each other.

  The processor 42 is a CPU (Central Processing Unit), a processing device, an arithmetic device, a microprocessor, a microcomputer, or a DSP (Digital Signal Processor). The function of the control unit 21 is realized by the processor 42 and software, firmware, or a combination of software and firmware. Software or firmware is described as a program and stored in the memory 43. The memory 43 is non-volatile or volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory). Built-in memory such as a semiconductor memory.

  A part of the function of the control unit 21 may be realized by dedicated hardware, and the other part of the function of the control unit 21 may be realized by software or firmware. As described above, the function of the control unit 21 can be realized by hardware, software, firmware, or a combination thereof.

  In addition, the function of the control part 11 which the main controller 10 has, and the function of the control part 31 which the air blower 30 has are implement | achieved by the processing circuit similarly to the function of the control part 21. The hardware configuration illustrated in FIG. 3 and the hardware configuration illustrated in FIG. 4 may be applied to the control unit 11 and the control unit 31.

  Next, switching of signals by the switch 26 and switching of power supply by the switch 27 will be described. FIG. 5 is a first explanatory diagram of switching by the switch 26 and the switch 27 included in the sub-controller 20 shown in FIG. FIG. 6 is a second explanatory diagram of switching by the switch 26 and the switch 27 included in the sub-controller 20 shown in FIG. 5 and FIG. 6, the components in the sub-controller 20 are schematically shown, and the components unnecessary for the description are not shown.

  The circuit unit 50 is an electronic component including the processing circuit 41 shown in FIG. 3 or the processor 42 shown in FIG. The main controller 10 is also provided with a circuit unit that is an electronic component similar to the circuit unit 50. The circuit portion of the main controller 10 is not shown. The sub-controller 20 has a two-circuit switch 28 having a switch 26 and a switch 27 as components. The ground line 57 connects the power supply circuit 35, the circuit unit 50 of the sub-controller 20, and the circuit unit of the main controller 10 to the reference potential point.

  The operation panel 24 shown in FIG. 2 has a mechanism for switching the state of the two-circuit switch 28 in response to an operation on components for switching between the collective control of the blower 30 and the control of the blower 30 for each area. The two-circuit switch 28 switches both the switch 26 and the switch 27 from the first state to the second state in accordance with the operation of the operation panel 24, and both the switch 26 and the switch 27 from the second state. Switching to the first state is performed. The switch 26 includes a first state in which the terminal 26a and the terminal 26c are in contact and the terminal 26b and the terminal 26c are separated from each other, and a second state in which the terminal 26a and the terminal 26c are separated from each other and the terminal 26b and the terminal 26c are in contact with each other. Switch. The switch 27 includes a first state in which the terminal 27a and the terminal 27c are in contact and the terminal 27b and the terminal 27c are separated from each other, and a second state in which the terminal 27a and the terminal 27c are separated from each other and the terminal 27b and the terminal 27c are in contact with each other. Switch. In response to the operation of the operation panel 24, the switch 26 and the switch 27 perform a switching operation between the first state and the second state in conjunction with each other.

  The signal line 51 is connected to the signal generation unit 12 of the main controller 10. The signal line 51 is a first signal line through which the first control signal generated by the signal generation unit 12 propagates. In the sub-controller 20, the signal line 51 is connected to the terminal 26a. The signal line 52 is a second signal line through which the second control signal generated by the signal generation unit 22 of the sub-controller 20 propagates. In the sub-controller 20, the signal line 52 is connected to the terminal 26b. The signal line 55 is a signal line through which the first control signal and the second control signal transmitted from the sub-controller 20 to the blower 30 propagate. The signal line 55 is connected to the terminal 26c.

  As shown in FIG. 5, when the switch 26 is in the first state, the signal line 51 and the signal line 55 are closed so as to be conductive, and the signal line 52 and the signal line 55 are conductive. Opened impossible. The first control signal generated by the function of the signal generation unit 12 in the main controller 10 propagates through the signal line 51 and the signal line 55 and reaches the control unit 31 of the blower 30. Propagation of the second control signal generated by the function of the signal generation unit 22 in the sub-controller 20 is blocked between the signal line 52 and the signal line 55.

  As shown in FIG. 6, when the switch 26 is in the second state, the signal line 51 and the signal line 55 are opened so as not to conduct, and the signal line 52 and the signal line 55 are not connected. Closed to allow conduction. Propagation of the first control signal is blocked between the signal line 51 and the signal line 55. The second control signal propagates through the signal line 52 and the signal line 55 and is transmitted to the control unit 31 of the blower 30. In this way, the switch 26 selectively selects the connection destination with the control unit 31 of the blower 30 from the signal line 51 and the signal line 52, and connects and controls the control unit 31 and the signal line 51. The connection between 31 and the signal line 52 is switched.

  The power line 53 is connected to the power supply unit 15 of the main controller 10. The power supply line 53 is a first power supply line through which a current supplied from the power supply circuit 35 to the power supply unit 15 of the main controller 10 flows. In the sub-controller 20, the power line 53 is connected to the terminal 27a. The power line 54 is connected to the circuit unit 50. The power supply line 54 is a second power supply line through which a current supplied from the power supply circuit 35 to the circuit unit 50 flows. The power line 54 is connected to the terminal 27b. The power line 56 is connected to the power circuit 35. The power supply line 56 is a power supply line through which a current supplied from the power supply circuit 35 to the power supply unit 25 of the sub-controller 20 flows. The terminal 27 c is connected to the power supply line 56 through the power feeding unit 25. 5 and 6, the illustration of the power feeding unit 25 is omitted.

  As shown in FIG. 5, when the switch 27 is in the first state, the power supply line 56 and the power supply line 53 are closed so as to be conductive, and the power supply line 56 and the power supply line 54 are conductive. Opened impossible. The electric power generated by the power supply circuit 35 is supplied to the power supply unit 15 of the main controller 10 by propagation of current in the power supply line 56 and the power supply line 53. The power supply to the circuit unit 50 by the power supply circuit 35 is interrupted between the power supply line 56 and the power supply line 54.

  As shown in FIG. 6, when the switch 27 is in the second state, the power supply line 56 and the power supply line 53 are opened so as not to conduct, and the power supply line 56 and the power supply line 54 are not connected. Closed to allow conduction. Power supply to the power supply unit 15 by the power supply circuit 35 is interrupted between the power supply line 56 and the power supply line 53. The electric power generated by the power supply circuit 35 is supplied to the circuit unit 50 by the propagation of current in the power supply line 56 and the power supply line 54. In this way, the switch 27 selectively selects the connection destination of the blower 30 to the power supply circuit 35 from the power supply line 53 and the power supply line 54, and connects the power supply circuit 35 and the power supply line 53 to the power supply circuit. The connection between the power line 35 and the power line 54 is switched.

  As described above, the operation panel 24 is provided with parts for switching between collective control of the blower 30 by the main controller 10 and control of the blower 30 for each area by the sub-controller 20. The switch 26 and the switch 27 perform a switching operation between the first state and the second state in accordance with an operation on the component. It is assumed that the switch 26 and the switch 27 can perform a physical operation for switching in conjunction with an operation on the component regardless of whether or not power is supplied to the sub-controller 20.

  When the switch 26 and the switch 27 are in the first state, the signal generation unit 12 of the main controller 10 generates a first control signal by supplying power to the power supply unit 15 via the power line 53. . The first control signal generated by the main controller 10 is transmitted to the blower 30 via the sub-controller 20. The blower 30 operates according to collective control by the main controller 10.

  When the switch 26 and the switch 27 are switched from the first state to the second state, the power supply to the power supply unit 15 of the main controller 10 is stopped. The signal generator 22 of the sub-controller 20 generates a second control signal by supplying power to the circuit unit 50 via the power line 54. The second control signal generated by the sub controller 20 is transmitted to the blower 30. The operation of the blower 30 is switched from the operation according to the collective control by the main controller 10 to the operation according to the control for each area by the sub controller 20.

  In the case where no failure has occurred in either the main controller 10 or the plurality of sub-controllers 20, the blower system 100 performs the collective control of the blower 30 by switching the two-circuit switch 28 based on the operation on the operation panel 24. The control for each area of the blower 30 is switched. When the two-circuit switch 28 is in the first state, the blower system 100 is configured to supply power from the power supply circuit 35 to the main controller 10 and to transmit a first control signal from the main controller 10 to the control unit 31. Perform batch control. When the two-circuit switch 28 is in the second state, the blower system 100 is configured to supply power from the power supply circuit 35 to the sub-controller 20 and to transmit a second control signal from the sub-controller 20 to the control unit 31. Control by area. The blower system 100 switches between the operation of the blower 30 by collective control of the blower 30 in the entire barn and the operation of the blower 30 by control according to area by the switch 26 and the switch 27 performing a switching operation in conjunction with each other. Can be implemented. The blower system 100 can operate the blower 30 according to the situation in the area by the operation control of the blower 30 for each area.

  Next, a first case where the sub-controller 20 has failed and a second case where the main controller 10 has failed will be described. In the first case, it is assumed that a failure has occurred in the circuit unit 50 of the sub-controller 20 shown in FIG. 5 that has a short circuit in which the load resistance is abnormally lower than the normal value. Such a failure can be caused by a lightning strike or induced lightning. When the current value flowing between the power supply line 56 and the ground line 57 becomes higher than a certain value due to a short circuit, the power supply circuit 35 reduces the output voltage by the operation of the overcurrent protection circuit.

  For example, when the power supply voltage, which is the output voltage of the power supply circuit 35, is 12 V, and the load resistance at normal time is 400Ω, the current value at normal time is 0.03 A. When the additional resistance decreases from 400Ω to 5Ω due to a short circuit, the current value increases from 0.03A to 2.4A. Assuming that the output current rating of the power supply circuit 35 is 0.5 A, when the overcurrent protection circuit operates when the current value becomes higher than 1 A, the power supply circuit 35 has increased to a current value of 2.4 A. The power supply voltage is lowered below 12V by the operation of the overcurrent protection circuit.

  The blower 30 stops its operation when the power supply voltage decreases. In addition to the sub controller 20 in which the failure has occurred, the main controller 10 that operates by supplying power from the power supply circuit 35 also stops operating due to a decrease in power supply voltage.

  In this case, when the switches 26 and 27 are set to the first state, the power supply circuit 35 is disconnected from the circuit unit 50 of the sub-controller 20 that controls the blower 30 having the power supply circuit 35. As a result, the power supply circuit 35 is disconnected from the circuit unit 50 in which the failure has occurred. When the switches 26 and 27 are in the second state when the failure occurs, the switches 26 and 27 are switched from the second state to the first state by operating the operation panel 24. When the switches 26 and 27 are set to the first state, the power supply circuit 35 is connected to the power supply unit 15 of the main controller 10. By disconnecting the failed circuit unit 50, the power supply voltage of the blower 30 and the power supply voltage of the main controller 10 are returned to normal values. The control unit 31 of the blower 30 is disconnected from the failed circuit unit 50 and is connected to the signal generation unit 12 of the main controller 10. Thereby, the operation of the blower 30 under the control of the main controller 10 becomes possible.

  Here, a specific example of the first case will be described. In the specific example, when the sub-controller 20-1 shown in FIG. 1 is supplied with power from the power supply circuit 35 of the fans 30-1, 30-2, 30-3, the circuit unit 50 of the sub-controller 20-1. Suppose that a failure occurs. In such a case, if the power supply line 53 and 54 are connected in parallel to the power supply line 56 instead of the switch 27 shown in FIG. 10 and the fans 30-1, 30-2, and 30-3, the fans 30-1, 30-2, and 30-3 cannot be operated. In addition, since the main controller 10 does not operate normally, the fans 30-4 to 30-9 other than the fans 30-1, 30-2, and 30-3 cannot be operated under the control of the main controller 10. Thus, even if the control is switched to the main controller 10 that has not failed due to a failure that has occurred in one sub-controller 20-1, the blower 30 cannot be operated.

  In the blower system 100 according to the first embodiment, when the switch 27 of the sub-controller 20-1 is set to the first state, the circuit unit 50 in which a failure has occurred is blown to the blowers 30-1, 30-2, and 30-3. The power supply circuit 35 can be disconnected. Since the power supply voltages of the fans 30-1, 30-2, and 30-3 and the main controller 10 can be set to normal values, the fans 30-1, 30-2, and 30-3 are operated by the control of the main controller 10. Is possible. Moreover, the air blower system 100 can avoid the situation where the influence of the failure of the sub-controller 20-1 reaches the operation of the air blowers 30-4 to 30-9 other than the air blowers 30-1, 30-2, and 30-3. .

  In the second case, it is assumed that a failure with a short circuit occurs in the circuit unit of the main controller 10 in which the load resistance is abnormally lower than the normal value. Also in this case, when the current value flowing between the power supply line 56 and the ground line 57 becomes higher than a certain value due to a short circuit, the power supply circuit 35 reduces the output voltage by the operation of the overcurrent protection circuit.

  In this case, the switches 26 and 27 are set to the second state, so that the power supply circuit 35 is disconnected from the circuit portion where the failure has occurred. When the switches 26 and 27 are in the first state when the failure occurs, the switches 26 and 27 are switched from the first state to the second state by operating the operation panel 24. By setting the switches 26 and 27 to the second state, the power supply circuit 35 is connected to the circuit unit 50 of the sub-controller 20. By disconnecting the failed circuit unit, the power supply voltage of the blower 30 and the power supply voltage of the sub-controller 20 are returned to normal values. The control unit 31 of the blower 30 is disconnected from the failed circuit unit and is connected to the signal generation unit 22 of the sub-controller 20. As a result, the blower 30 can be operated under the control of the sub-controller 20.

  Here, a specific example of the second case will be described. In a specific example, when the main controller 10 shown in FIG. 1 receives power supply from the power supply circuit 35 of the blowers 30-1 to 30-9, it is assumed that a failure has occurred in the circuit unit of the main controller 10. If, in this case, instead of the switch 27 shown in FIG. 5, two power lines 53 and 54 connected in parallel to each other are connected to the power line 56, Since the reduction reaches the sub-controllers 20-1, 20-2, 20-3 and the fans 30-1 to 30-9, the fans 30-1 to 30-9 cannot be operated. Further, the operations of the sub-controllers 20-1, 20-2, and 20-3 cannot be performed normally. Thus, even if the control is switched to the sub-controller 20 in which a failure has not occurred due to a failure that has occurred in the main controller 10, the blower 30 cannot be operated.

  In the blower system 100 according to the first embodiment, the switch 27 of the sub-controllers 20-1, 20-2, and 20-3 is set to the second state, whereby the circuit unit that has failed is blown to the blower 30-1. It can be disconnected from the power supply circuit 35 of 30-9. Since the power supply voltages of the fans 30-1 to 30-9 and the sub-controllers 20-1, 20-2, 20-3 can be set to normal values, the sub-controllers 20-1, 20-2, 20-3 The fans 30-1 to 30-9 can be operated by the control.

  According to the first embodiment, the sub-controller 20 includes the switch 27 that switches between the connection between the power supply circuit 35 and the power supply line 53 and the connection between the power supply circuit 35 and the power supply line 54. The sub-controller 20 can switch the connection destination of the power supply circuit 35 to the power supply line 53 and the power supply line 54, so that one of the main controller 10 and the sub-controller 20 can operate normally due to one failure. It becomes possible to prevent the situation of disappearing. Thereby, in the air blowing system 100 having the sub controller 20 connected to the main controller 10, even if one of the main controller 10 and the sub controller 20 fails, the operation control of the air blower 30 by the other can be performed. Play.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  10 main controller, 11, 21, 31 control unit, 12, 22 signal generation unit, 13, 23, 33 communication unit, 14, 24 operation panel, 15, 25 power feeding unit, 20, 20-1, 20-2, 20 -3 sub-controller, 26, 27 switch, 26a, 26b, 26c, 27a, 27b, 27c terminal, 282 circuit switch, 30, 30-1, 30-2, 30-3, 30-4, 30-5 30-6, 30-7, 30-8, 30-9 Blower, 35 Power supply circuit, 36 Motor, 37 Fan, 41 Processing circuit, 42 Processor, 43 Memory, 50 Circuit part, 51, 52, 55 Signal line, 53 , 54, 56 Power line, 57 Ground line, 100 Blower system.

Claims (5)

A controller that can be connected to a main controller that generates a first control signal for collective control of operation of a plurality of fans and a fan included in the plurality of fans,
A signal generator for generating a second control signal for controlling the blower connected to the controller;
A power supply switching circuit for switching a connection destination of a power supply line connected to a power supply circuit included in the blower between the signal generation unit and the main controller;
A controller comprising:   The power supply switching circuit includes a first power supply line through which a current supplied from the power supply circuit to the main controller flows, and a current supplied from the power supply circuit to the signal generation unit. The controller according to claim 1, wherein the controller is switched between two power lines. Signal switching for switching between a connection between the first signal line through which the first control signal propagates and the blower and a connection between the second signal line through which the second control signal propagates and the blower With a circuit,
The controller according to claim 1, wherein the power supply switching circuit and the signal switching circuit perform a switching operation in conjunction with each other. A plurality of fans arranged in a distributed manner in a plurality of areas;
A main controller that is capable of receiving power supply from a power supply circuit included in the fans included in the plurality of fans and controlling operation of the plurality of fans;
A sub-controller connected to the main controller and a blower in the area, receiving power from the power supply circuit of the blower in the area and controlling the operation of the blower in the area;
With
The main controller has a first signal generation unit that generates a first control signal for collective control of operation of the plurality of fans.
The sub-controller
A second signal generator for generating a second control signal for controlling the blower in the area;
A first power line through which a current supplied from the power circuit to the first signal generator flows;
A second power line through which a current supplied from the power circuit to the second signal generator flows;
A power supply switching circuit for switching between a connection between the power supply circuit and the first power supply line and a connection between the power supply circuit and the second power supply line;
A blower system characterized by comprising: A first signal line through which the first control signal propagates;
A second signal line through which the second control signal propagates;
With
The sub-controller has a signal switching circuit that switches a connection between the first signal line and the blower in the area and a connection between the second signal line and the blower in the area;
The blower system according to claim 4, wherein the power supply switching circuit and the signal switching circuit perform a switching operation in conjunction with each other.

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