JP2019097251A - Cogeneration apparatus - Google Patents

Abstract

To provide a cogeneration device to which devices of a plurality of types different in communication form are selectively connected, the cogeneration device being able to determine the type of each connection device.SOLUTION: A control device 62 comprises a communication trial unit 71, communication establishment frequency setting unit 71b, and a connection device type determination unit 72. The communication trial unit 71a tries communication with a connection device more than one time while the connection device is connected to a connection unit so as to be allowed for communication. In a case where the communication form of received data obtained when the communication with the connection device is tried by the communication trial unit 71a matches the communication form of one of a plurality of communication circuits, the communication establishment frequency setting unit 71b increases the frequency of communication establishment by the one communication circuit, and initializes the respective frequencies of communication establishments by the other communication circuits. The connection device type determination unit 72 determines, as the type of a connection device, the type of a device communicating in a communication form of a communication circuit equal to or higher frequency in the frequency of communication establishment, set by the communication establishment frequency setting unit 71b.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cogeneration system.

  The cogeneration apparatus described in Patent Document 1 includes a connection terminal. A remote controller for a power generation device, a remote controller for a water heater, and a water heater controller can be connected to the connection terminal. Further, the microcomputer that controls the cogeneration system can communicate with the device connected to the connection terminal.

JP, 2016-207276, A

  However, in the cogeneration apparatus described in Patent Document 1, the communication format (for example, communication protocol etc.) of the device connected to the connection terminal is not considered. For example, when devices are manufactured by different manufacturers, the communication format may differ depending on the device. In this case, it is conceivable to mount in parallel a plurality of communication circuits corresponding to a plurality of communication formats, and it is necessary to determine the type of connected device.

  The present invention has been made in view of such circumstances, and in a cogeneration apparatus in which a plurality of types of devices having different communication types are selectively connected, a cogeneration apparatus capable of determining the type of a connected device The task is to provide.

  In the cogeneration system according to the present invention, the power generation system is linked to the system power supply, and the exhaust heat generated as a result of the power generation of the power generation system is recovered, and can communicate with a plurality of mutually compatible devices. The cogeneration apparatus includes a connection unit to which the plurality of types of devices having different communication types are selectively connected, a control device capable of communicating with a connection device that is a device connected to the connection unit, and the connection unit. And the control device, and includes a plurality of communication circuits that propagate communication signals between the connection device and the control device and correspond to a plurality of communication types of at least the plurality of types of devices. . When the control device attempts to communicate with the connection device by the communication attempt unit that attempts to communicate with the connection device a plurality of times in a state where the connection device is communicably connected to the connection unit When the communication format of the received data acquired in the above matches the communication format of one communication circuit among the plurality of communication circuits, the number of times of communication establishment by the one communication circuit is increased, and communication by the other communication circuit is performed. A type of connected device is defined as a type of device to be communicated in a communication format of a communication circuit in which the number of times of communication establishment set by the communication establishment frequency setting unit is a communication establishment frequency setting unit that initializes the establishment frequency. And a connected device type determination unit.

  According to the cogeneration apparatus described above, when increasing the number of times of communication establishment by one communication circuit, the communication establishment number of times setting unit initializes the number of times of communication establishment by other communication circuits. Therefore, even if a plurality of communication types match, the communication establishment frequency setting unit can initialize the mutual communication establishment frequency, and can reduce erroneous determination of the connected device by the connected device type determination unit.

FIG. 1 is a configuration diagram showing an example of a cogeneration system 1 provided with a cogeneration device 10. It is a schematic diagram which shows an example of the generator 11a of FIG. It is a block diagram which shows an example of the communication circuit of the electric power generating apparatus control apparatus 19 of FIG. It is a block diagram which shows an example of the control block of the control apparatus 62 of FIG. It is a flowchart which shows an example of the control flow which communicates via the communication circuit 63a, and discriminate | determines the kind of the connection apparatus 60. FIG. It is a flowchart which shows an example of the control flow which communicates via the communication circuit 63b, and discriminate | determines the kind of the connection apparatus 60. FIG. It is a flowchart which shows an example of the control flow which communicates via the communication circuit 63c, and discriminate | determines the kind of the connection apparatus 60. FIG. 10 is a flowchart showing an example of a control flow for determining the type of the connected device 60. FIG. 16 is a flowchart showing an example of a control flow in the case of using the type of the connected device 60 stored in the storage device 65. FIG.

  Embodiments are described herein based on the drawings. In the drawings, common parts are denoted by common reference numerals, and redundant descriptions are omitted in the present specification.

Embodiment
(Schematic Configuration of Cogeneration Device 10)
As shown in FIG. 1, the cogeneration system 1 includes a cogeneration system 10 and a hot water supply system 40. The cogeneration device 10 includes a housing 10 a, a power generation device 11, a power supply substrate 13, a power generation device control device 19, and a hot water storage tank 21. The housing 10 a accommodates the power generation device 11, the power supply substrate 13, the power generation device control device 19, and the hot water storage tank 21. The power generation device 11 includes a power generator 11 a that generates electric power (in the present embodiment, AC power), and a power conversion device 11 b that generates DC power. As shown in FIG. 2, the generator 11a includes a fuel cell 11a1, an evaporator 11a2, and a reformer 11a3.

  The evaporation unit 11a2 is heated by a combustion gas described later to evaporate the supplied reforming water to generate steam, and preheats the supplied raw fuel (reforming raw material). The evaporation unit 11a2 mixes the generated steam and the preheated reforming raw material, and supplies a mixed gas to the reforming unit 11a3. Examples of the raw material for reforming include natural gas, gaseous fuel for reforming such as LPG, and liquid fuel for reforming such as kerosene, gasoline and methanol. In the present embodiment, the reforming raw material is natural gas.

  The reforming unit 11a3 is heated by the combustion gas described later and supplied with heat necessary for the steam reforming reaction, so that the reformed gas from the mixed gas (reforming raw material and steam) supplied from the evaporation unit 11a2 is generated. Generate and derive. The mixed gas is reacted by the catalyst and reformed to generate hydrogen gas and carbon monoxide gas (so-called steam reforming reaction). At the same time, so-called carbon monoxide shift reaction occurs, in which carbon monoxide and hydrogen generated by the steam reforming reaction react to transform into hydrogen gas and carbon dioxide. The generated gas (so-called reformed gas) is led to the fuel electrode of the fuel cell 11a1.

  The fuel cell 11a1 generates electricity from the fuel and the oxidant gas. The fuel cell 11a1 is configured by stacking a plurality of cells 11a1a formed of a fuel electrode, an air electrode (oxidizer electrode), and an electrolyte provided between the two electrodes in the left-right direction in FIG. The fuel cell 11a1 of the present embodiment is a solid oxide fuel cell, and zirconium oxide, which is a type of solid oxide, is used as an electrolyte. The fuel electrode of the fuel cell 11a1 is supplied with hydrogen as a fuel, carbon monoxide, methane gas and the like. A fuel flow passage 11a1b is formed on the fuel electrode side of the cell 11a1a, through which the reformed gas as the fuel flows. On the air electrode side of the cell 11a1a, an air flow path 11a1c through which air (cathode air), which is an oxidant gas, flows is formed. Cathode air is supplied to the air flow passage 11a1c by a cathode air blower 11a4 (or a cathode air pump).

In the fuel cell 11a1, power generation is performed by the fuel supplied to the fuel electrode and the oxidant gas supplied to the air electrode. That is, in the fuel electrode, reactions shown in the following chemical formula 1 and chemical formula 2 occur, and in the air electrode, a reaction shown in chemical formula 3 below occurs. That is, oxide ions (O ²⁻ ) generated at the air electrode pass through the electrolyte and react with hydrogen at the fuel electrode to generate electric energy.
(Formula 1)
H ₂ + O ^2- → H ₂ O + 2 e ⁻
(Formula 2)
CO + O ^2- → CO ₂ + 2 e ⁻
(Formula 3)
^{_{1 / 2O 2 + 2e - →}} O 2-

  The reformed gas not used for power generation derived from the fuel flow channel 11a1b and the oxidant gas (air) not used for power generation derived from the air flow channel 11a1c burn to generate combustion gas.

  As shown in FIG. 1, the power conversion device 11 b converts direct current power supplied from the fuel cell 11 a 1 into alternating current power, and outputs the converted alternating current power. One end side of the electric wire 14 is connected to the power conversion device 11 b, and AC power of the power conversion device 11 b is output to the electric wire 14. An electrical load 15 is connected to the other end of the wire 14. The power output from the power conversion device 11 b is supplied to the electrical load 15 via the electric wire 14 as necessary. Examples of the electric load 15 include appliances such as a light, an iron, a television, a washing machine, an electric kotatsu, an electric carpet, an air conditioner, and a refrigerator. When the power transmission of the system power supply 30 is normal, the electric load 15 can be supplied with power from both the power generation device 11 and the system power supply 30. The electric load 15 and the switchboard 32 are disposed at a power use place A1 (for example, indoor).

  A connection point 14a is provided on the electric wire 14 between the power conversion device 11b and the electric load 15, and one end side of the power supply line 31 is connected to the connection point 14a. The other end side of the power supply line 31 is connected to the system power supply 30. Moreover, on the power supply line 31, the switchboard 32 is arrange | positioned. When the power consumption of the electrical load 15 exceeds the power generated by the cogeneration device 10, the insufficient power is supplied from the system power source 30 to the electrical load 15 via the power supply line 31 and the switchboard 32.

  In addition, the power conversion device 11 b can also convert the AC power of the system power supply 30 supplied via the power supply line 31 and the electric wire 14 into DC power and output it. The DC power output from the power conversion device 11 b is output to the power supply substrate 13. The power supply substrate 13 can convert the supplied DC power into predetermined DC power and supply the DC power to the generator control device 19, the accessory 10b, and the like. The auxiliary machine 10 b is a reforming water pump (not shown), a raw material pump, a temperature sensor of each part, and the like, and includes an apparatus that operates with DC power necessary to operate the cogeneration apparatus 10.

  A current sensor 31 a is disposed on the power supply line 31 and between the system power supply 30 and the switchboard 32. The current sensor 31a detects an alternating current related to the alternating current power supplied from the system power supply 30 to the power conversion device 11b. The detection signal of the alternating current detected by the current sensor 31 a is output to the power generation device control device 19. In the present embodiment, the current sensor 31a is provided to detect the alternating current of the system power supply 30, but a voltage sensor for detecting the AC voltage supplied from the system power supply 30 to the power conversion device 11b is used. It may be arranged, and a power sensor for detecting AC power supplied from the system power supply 30 to the power conversion device 11b may be arranged.

  Furthermore, the cogeneration system 10 includes a switch 14 c, a sensor 11 b 1 and a power generation system controller 19. The switch 14c is disposed on the electric wire 14 between the connection point 14a and the power conversion device 11b, and electrically disconnects or connects the power conversion device 11b and the system power supply 30 by opening or closing the circuit. .

  The sensor 11b1 is disposed between the power conversion device 11b and the breaker 14d. More specifically, the sensor 11b1 is disposed between the switch 14c and the breaker 14d. The sensor 11 b 1 detects at least one of the voltage and the current at the arranged position, and detects whether the power generation device 11 is supplied with power from the system power supply 30. In the present embodiment, the sensor 11 b 1 detects the voltage at the disposed position. The detection signal of the voltage detected by the sensor 11 b 1 is output to the power generation device control device 19. The sensor 11b1 is disposed between the breaker 14d and the power generation device 11, and detects at least one of the voltage and the current at the disposed position.

  Further, a breaker 14 d is disposed on the electric wire 14 and between the switch 14 c and the connection point 14 a (that is, between the system power supply 30 and the power generation device 11). When power transmission is performed from the system power supply 30, and an abnormal current (for example, an overcurrent) flows in the wire 14 due to any cause, the breaker 14d automatically opens the wire path of the wire 14. As a result, the cogeneration system 10 can be avoided from damage due to abnormal current or the like.

  The power generation device control device 19 at least controls the power generation device 11 (fuel cell 11 a 1). Specifically, when there is power supply from the system power supply 30, the generator control unit 19 controls the auxiliary machine 10b to control the power generation amount of the fuel cell 11a1 so that the power consumption of the electric load 15 is achieved. Do. At this time, when the power consumption of the electric load 15 exceeds the power generated by the fuel cell 11a1, the insufficient power can be compensated by receiving power from the system power supply 30. In the case of a power failure, the power generation device controller 19 controls the amount of power generation of the fuel cell 11a1 to be a constant output power.

  The switch 14 c is controlled to open and close in accordance with an instruction from the power generation device control device 19. When the system power supply 30 is abnormal such as a power failure, the switch 14 c is opened to disconnect the power generation device 11 and the system power supply 30. The switch 14 c is closed when the system power supply 30 is normal, and interconnects the power generation device 11 and the system power supply 30.

  The cogeneration system 10 includes a remote controller 25 for a power generation system. The power generation device remote control 25 is communicably connected to the power generation device control device 19 so that the operator can operate the cogeneration device 10. The power generation device remote controller 25 can also display the operating status of the cogeneration system 10, such as the power generated by the generator 11a, the amount of power used, and the amount of remaining hot water in the hot water storage tank 21. Further, the power generation device remote control 25 is connected to the water heater control device 42 so as to be able to communicate with each other. The remote controller 25 for power generation device can also display the operation of the water heater 41, the operating condition, and the like. Note that the power generation device remote control 25 can also be omitted.

  The cogeneration system 10 includes a hot water storage unit 20. The hot water storage unit 20 is accommodated in a housing 10 a of the cogeneration system 10. The hot water storage unit 20 includes a hot water storage tank 21.

  The hot water storage tank 21 can store hot and cold water obtained by recovering the exhaust heat of the power generation device 11 (fuel cell 11a1) by heat exchange. A hot water circulation circuit 22 for circulating hot water (hot water) in the hot water storage tank 21 is connected to the hot water storage tank 21. A heat exchanger 23 is disposed on the hot water circulation circuit 22. One end side of the flow path 23 a is connected to the heat exchanger 23. The other end side of the flow path 23a is connected to the discharge port of the generator 11a, and the exhaust heat of the generator 11a is discharged through the flow path 23a. The heat exchanger 23 exchanges heat between the exhaust heat supplied via the flow path 23 a and the hot water circulating in the hot water circulation circuit 22. That is, when the hot water circulates in the hot water circulation circuit 22 by the drive of a pump (not shown) during the power generation of the cogeneration device 10, the hot water has a heat exchanger 23 with the exhaust heat of the cogeneration device 10 discharged through the flow path 23a. The hot and cold water is heated by recovering through the

  In the case of the cogeneration system 10, for example, the exhaust heat of the generator 11a refers to the exhaust heat of the fuel cell 11a1, the exhaust heat of the reforming unit 11a3, and the like. However, the exhaust heat is not limited to these, and recoverable exhaust heat such as the heat of the cogeneration device 10 itself can be used. In addition, the hot water storage unit 20 may be provided as another unit of the cogeneration system 10 outside the housing 10 a.

  The hot water storage tank 21 is provided with one column-like container, and the warm water is layered in the inside thereof, that is, the warm water at the upper portion is the highest temperature, the lower temperature as it goes to the lower portion and the lower warm water is stored at the lowest temperature. Ru. The high temperature hot water stored in the hot water storage tank 21 is derived from the upper part of the columnar container of the hot water storage tank 21, and water (low temperature water) such as tap water is columnar in the hot water storage tank 21 so as to replenish the derived quantity. It is introduced from the bottom of the container. The hot water storage tank 21 may be configured so that tap water merges with the hot and cold water drawn from the hot water storage tank 21. Thereby, the temperature of the hot and cold water from the hot water storage tank 21 is lowered.

  One end side of the hot water supply pipe 24 is connected to the hot water storage tank 21. The other end of the hot water supply pipe 24 is connected to the water heater 41. The hot and cold water in the hot water storage tank 21 is supplied to the water heater 41 via the hot water supply pipe 24. The hot water supply system 40 includes a water heater 41, a hot water heater controller 42, a power supply substrate 43, a hot water pipe 44, and a remote controller 45 for the hot water heater.

  The hot water heater 41 heats the hot and cold water introduced from the hot water storage tank 21 with a heat source and supplies the hot water. As a heat source, for example, a combustor for burning raw fuel, a heat exchanger, an electric heater and the like can be mentioned. In the present embodiment, the heat source is a combustor, and the raw fuel is the same natural gas as the reforming raw material. The water heater 41 adjusts the combustion of the combustor so that the temperature of the hot and cold water detected by the temperature sensor (not shown) becomes the set hot water supply temperature. Further, although not shown, tap water can join the water heater 41. Thereby, it is also possible to cool the hot and cold water. The water heater control device 42 adjusts the temperature of the hot water supplied from the water heater 41 as described above. The water heater control device 42 is communicably connected to the power generation device control device 19.

  The power supply substrate 43 supplies driving power to the water heater 41 and the water heater control device 42. In the power supply substrate 43, AC power of the system power supply 30 is distributed by the switchboard 32 and supplied via the electric wire 33. The power supply substrate 43 converts the supplied AC power into predetermined DC power and supplies the DC power to the water heater 41 and the water heater control device 42.

  The hot water supply pipe 44 is connected to a plurality of hot water using devices A2a installed in hot water using place A2 (for example, indoor) which uses hot water supplied from the hot water supply device 41 as hot water supply. Examples of the hot water utilization device A2a include a bathtub, a shower, a kitchen (a kitchen faucet), and a bathroom (a bathroom faucet). Further, a heat utilizing device A2b installed at a hot water using place A2 using the hot water supplied from the hot water heater 41 as a heat source is connected to the hot water supply pipe 44. Examples of the heat utilization device A2b include bathroom heating, floor heating, and a hot water saving mechanism of a bathtub.

  The water heater remote control 45 is communicably connected to the water heater control device 42, and the operator can operate the water heater 41. The operating condition of the water heater 41 such as the water temperature is displayed on the water heater remote control 45. The water heater remote control 45 is also connected communicably to the power generation device control device 19. The remote controller 45 for the water heater can also display the operation of the cogeneration system 10 and the operating condition.

  Furthermore, the power generation device control device 19 can be connected to the power generation device remote control 25 via the first communication path 51. The first communication path 51 is a communication path electrically connected to the power generation device remote control 25, and transmits and receives (communicates) a first PLC signal with the power generation device remote control 25. One end side of the first communication path 51 is connected to a connection terminal (not shown) of the remote controller 25 for the power generation device. The other end side of the first communication path 51 is connected to the connection terminal 19 a of the power generation device controller 19. The first communication path 51 is also a power supply path for communicating the first PLC signal and supplying power.

  The second communication path 52 and the third communication path 53 can be connected to the connection terminal 19a. The second communication path 52 is a communication path connected to the hot water supply system 40 (water heater control device 42), and transmits / receives a second PLC signal to / from the hot water supply system 40 (water heater control device 42). One end side of the second communication path 52 is connected to a connection terminal (not shown) of the water heater control device 42. The other end side of the second communication path 52 is connected to the connection terminal 19 a of the power generation device controller 19. The second communication path 52 is also a power supply path for communicating the second PLC signal and supplying power.

  The third communication path 53 is a communication path connected to the water heater remote control 45 for operating the hot water supply system 40, and transmits and receives the third PLC signal with the water heater remote control 45. One end side of the third communication path 53 is connected to a connection terminal (not shown) of the remote controller 45 for the water heater. The other end of the third communication path 53 is connected to the second communication path 52. The third communication path 53 is also a power supply path for communicating the third PLC signal and supplying power.

  The first PLC signal refers to a first power line communication (PLC) signal. The second PLC signal refers to a second power line carrier communication (PLC) signal. The third PLC signal refers to a third power line carrier communication (PLC) signal. DC power is supplied to each of the first communication path 51, the second communication path 52, and the third communication path 53.

  The connection terminal 19a corresponds to a connection portion 61 connected to a plurality of types of devices 60a, 60b, and 60c described later. For example, the plurality of types of power generation device remote controllers 25 having different communication types correspond to the plurality of types of devices 60a, 60b, 60c having different communication types. The plurality of types of water heater remote controls 45 having different communication types correspond to the plurality of types of devices 60a, 60b, 60c having different communication types. A plurality of types of water heating system 40 (water heater control device 42) having different communication types correspond to a plurality of types of devices 60a, 60b, 60c having different communication types. The plurality of types of devices 60a, 60b, and 60c are not limited to these, and may be devices that can cooperate with the cogeneration device 10 and that can communicate with each other. For example, the plurality of types of devices 60a, 60b, and 60c may be other power generation units such as a solar power generation unit, a fuel cell unit, and a storage battery system.

(Schematic configuration of communication circuit)
As shown in FIG. 3, the cogeneration apparatus 10 includes a connection unit 61, a control device 62, a plurality of (three in the present embodiment) communication circuits 63a, 63b and 63c, and a plurality (in the present embodiment) 3) filter circuits 64a, 64b and 64c, and a storage unit 65. In the present embodiment, these are provided in the power generation device control device 19, but they can also be provided in a device different from the power generation device control device 19.

  The connection unit 61 selectively connects a plurality of types (three types) of devices 60a, 60b, and 60c having different communication types. The cogeneration apparatus 10 according to the present embodiment includes one connection portion 61 (one connection terminal 19a), and in one connection portion 61, devices 60a, 60b, and 60c of a plurality of types (three types) are selectively selected. Connected Therefore, a plurality of (three) communication circuits 63 a, 63 b, 63 c having different circuit characteristics can be integrated into one connection portion 61. In addition, simplification of connection work of multiple types (three types) of devices 60a, 60b, and 60c and erroneous connection can be suppressed. For example, a connector, a terminal block, or the like can be used as the connection unit 61.

  The control device 62 communicates with a connected device 60 which is a device (one of a plurality of types (three types of devices 60 a, 60 b, 60 c)) connected to the connection unit 61. As described above, the cogeneration system 10 according to this embodiment can perform power line carrier communication (PLC), but the type of communication is not limited to this. That is, the control device 62 can also perform communication with the connection device 60 without power supply. Further, the number of data lines for transmitting communication data is not limited, and communication may be serial communication or parallel communication.

  In the figure, the communication port in the case of performing communication via the communication circuit 63a is indicated by the communication port 62a. Similarly, a communication port in the case of performing communication via the communication circuit 63b is indicated by the communication port 62b. A communication port in the case where communication is performed via the communication circuit 63c is indicated by a communication port 62c. Further, in the present embodiment, the control device 62 is also used as a control device of the power generation device control device 19 and can also control the cogeneration device 10 in an integrated manner.

  A plurality of (three) communication circuits 63 a, 63 b and 63 c are provided between the connection unit 61 and the control device 62. The plurality (three) of communication circuits 63a, 63b, 63c propagate communication signals between the connection device 60 and the control device 62, and at least a plurality of types (three types in the present embodiment) of the devices 60a, 60b, It corresponds to multiple (three in this embodiment) communication types 60c. The plurality of (three) communication circuits 63a, 63b, and 63c may use, for example, a known integrated circuit for communication. The integrated circuit (IC) for communication may be a modem or the like.

  The communication format refers to, for example, a communication protocol. For example, when manufacturers of a plurality of types (three types) of devices 60a, 60b, and 60c are different, the communication format may be different depending on the devices 60a, 60b, and 60c. In the present embodiment, the communication types (communication protocols) of the plurality of types (three types) of devices 60a, 60b, and 60c are different. The communication circuit 63a corresponds to one communication format (the communication format of the device 60a) among a plurality of (three) communication formats. The communication circuit 63 b corresponds to one other communication format (the communication format of the device 60 b) among the plurality (three) of communication formats. The communication circuit 63c corresponds to the remaining one of the plurality (three) of communication types (the communication type of the device 60c).

  Examples of the communication format (communication protocol) include header information, data length, and an error detection method. Examples of the error detection method include parity check, cyclic redundancy check, and Hamming code. In the case of packet communication, packet transmission / reception timing is also included as an example of a communication format (communication protocol). When each of the above mentioned elements (for example, header information, data length, error detection method, packet transmission / reception timing, etc.) all match, the communication format (communication protocol) is the same, and even one element does not match. In the case, the communication format (communication protocol) is different.

  The plurality of (three) filter circuits 64a, 64b, 64c are provided between the connection portion 61 and the plurality (three) of communication circuits 63a, 63b, 63c. Specifically, the filter circuit 64a is provided on the communication path between the connection unit 61 and the communication circuit 63a. The filter circuit 64 b is provided on the communication path between the connection unit 61 and the communication circuit 63 b. The filter circuit 64c is provided on the communication path between the connection unit 61 and the communication circuit 63c.

  The plurality of (three) filter circuits 64a, 64b, 64c reduce the noise mixed in the communication signal propagating through the communication path described above, and pass the communication signal with the noise reduced. Therefore, the plurality (three) of filter circuits 64a, 64b, 64c use band pass filters that allow passage of frequency components in the frequency band of the communication signal and restrict passage of frequency components other than the frequency band of the communication signal. It is good. Note that high-pass filters and low-pass filters can be appropriately used as the plurality (three) of filter circuits 64a, 64b, 64c according to the type of communication signal. Further, the plurality (three) of filter circuits 64a, 64b and 64c may be passive filters constituted of only passive elements, or may be active filters using active elements. Furthermore, when the influence of noise is small, the plurality (three) of filter circuits 64a, 64b and 64c can be omitted.

  The storage device 65 stores the type of the connected device 60 that is the device (one of the plurality of types (three types of devices 60a, 60b, and 60c)) connected to the connection unit 61. The memory | storage device 65 just memorize | stores the kind of connection apparatus 60, and is not limited. The storage device 65 can use, for example, a known non-volatile storage device. Examples of the non-volatile storage device include flash memory, EEPROM: Electrically Erasable Programmable Read Only Memory, and the like. In addition, when not providing the connection apparatus type write-in part 73 mentioned later, the memory | storage device 65 can also be abbreviate | omitted.

(Control block and control flow of controller 62)
As shown in FIG. 4, when considered as a control block, the control device 62 includes a communication trial unit 71 a, a communication establishment frequency setting unit 71 b, and a connected device type determination unit 72. Preferably, the control device 62 further includes a connected device type writing unit 73. As shown in the figure, the control device 62 according to the present embodiment includes a communication trial unit 71 a, a communication establishment frequency setting unit 71 b, a connected device type determination unit 72, and a connected device type writing unit 73. Further, the control device 62 executes the control program according to the flowcharts shown in FIGS. 5A to 5D. The communication trial unit 71 a manages communication with the connection device 60. The communication establishment number setting unit 71b performs the control illustrated in the flowcharts of FIGS. 5A to 5C and the determination and processing of steps S211 to S216 of FIG. 5D. The connected device type determination unit 72 performs the determination and the process of step S217 and step S218 of FIG. 5D. The connected device type writing unit 73 performs the process of step S219 in FIG. 5D. The determination and processing of steps S220 to S222 in FIG. 5D are performed by a control unit (not shown).

  The communication trial unit 71 a attempts to communicate with the connection device 60 a plurality of times in a state where the connection device 60 is communicably connected to the connection unit 61. The communication trial unit 71a can simultaneously attempt to communicate with the connection device 60 via, for example, a plurality of (three in the present embodiment) communication circuits 63a, 63b, 63c. In this case, the communication trial unit 71a permits communication via the plurality (three) of communication circuits 63a, 63b, and 63c. The communication trial unit 71a can also try to communicate with the connected device 60 by sequentially selecting one of the plurality of (three in the present embodiment) communication circuits 63a, 63b, 63c. In this case, the order in which communication is attempted is not limited. The communication trial unit 71a can, for example, select a communication circuit in the order of the communication circuit 63a, the communication circuit 63b, and the communication circuit 63c, and try communication with the connected device 60. For example, when the communication circuit 63a is selected, the communication trial unit 71a permits communication via the communication circuit 63a and prohibits communication via the communication circuit 63b and the communication circuit 63c. Similarly, when selecting the communication circuit 63b and the communication circuit 63c, the communication trial unit 71a permits or prohibits communication via each communication circuit. The number of times that the communication trial unit 71 attempts to communicate is not limited, but at least the predetermined number used by the connected device type determination unit 72 described later when determining the type of the connected device 60.

  The communication establishment number setting unit 71b has a plurality of (three in the present embodiment) communication circuits 63a, 63b, 63c in the communication format of the reception data acquired when the communication trial unit 71a attempts to communicate with the connected device 60. When the communication format of one of the communication circuits is matched, the number of times of communication establishment by the one communication circuit is increased, and the number of times of communication establishment by the other communication circuit is initialized. In the present specification, the counter A indicates the number of times of communication establishment in which the received data and the communication format of the communication circuit 63a match. Similarly, the counter B indicates the number of times of communication establishment in which the received data and the communication format of the communication circuit 63b match. A counter C indicates the number of times of communication establishment in which the received data and the communication format of the communication circuit 63c match. Also, for example, setting the initial value of the number of times of communication establishment to zero and clearing the number of times of communication establishment to zero corresponds to initializing the number of times of communication establishment.

  As shown in FIG. 5A, the communication establishment number setting unit 71b determines the presence or absence of received data received via one communication circuit (in this case, the communication circuit 63a) (step S11a). If there is received data ("Yes" in step S11a), control proceeds to step S12a. When there is no reception data (in the case of “No” in step S11a), the control returns to step S11a and waits until reception data is received.

  The communication establishment number setting unit 71b determines whether or not the communication format of the received data matches the communication format of the one communication circuit (communication circuit 63a) (step S12a). Whether or not the communication format matches is determined based on whether each of the elements of the communication format (for example, header information, data length, error detection method, packet transmission / reception timing, etc.) all match, as described above. Be done. If the communication format matches (in the case of “Yes” in step S12a), the communication establishment frequency setting unit 71b increases the number of times of communication establishment (counter A) by the one communication circuit (communication circuit 63a) (step S13a) . The amount of increase in the number of times of communication establishment is not limited. In the present embodiment, the communication establishment number setting unit 71b adds 1 to the current count value of the counter A. The amount of increase in the number of times of communication establishment is the same for the counters B and C. On the other hand, when the communication formats do not match (in the case of “No” in step S12a), the control is temporarily ended.

  As described above with reference to FIGS. 5B and 5C, what has been described above for communication via the communication circuit 63a is also applicable to communication via the communication circuit 63b and communication via the communication circuit 63c. Step S11 b and step S11 c correspond to step S11 a. Step S12b and step S12c correspond to step S12a. Step S13b and step S13c correspond to step S13a. Thus, the communication establishment number setting unit 71b sets the provisional communication establishment number (counter A) by the communication circuit 63a, the provisional communication establishment number (counter B) by the communication circuit 63b, and the provisional communication establishment number by the communication circuit 63c. (Counter C) is calculated respectively.

  For example, it is assumed that the connection device 60 is the device 60a. When the communication trial unit 71a attempts to communicate via the communication circuit 63a, the control device 62 uses the communication circuit 63a to communicate with the connected device 60 (the same as the communication format of the device 60a). Communicate with 60a). Therefore, normally, the communication format of the received data received by the control device 62 matches the communication format of the communication circuit 63a (in the case of “Yes” in step S12a).

  On the other hand, when the communication trial unit 71a attempts to communicate via the communication circuit 63b, the control device 62 connects the connected device 60 with the communication format of the communication circuit 63b (different from the communication format of the device 60a) via the communication circuit 63b. Communicate with (device 60a). Therefore, normally, the communication format of the received data received by the control device 62 does not match the communication format of the communication circuit 63b (in the case of "No" in step S12b). What has been described above regarding the communication via the communication circuit 63b is similarly applicable to the communication via the communication circuit 63c. Therefore, normally, only the communication establishment frequency (counter A) by the communication circuit 63a is increased (step S13a), and the communication integration frequency (counter B) by the communication circuit 63b and the communication integration frequency (counter C) by the communication circuit 63c increase. I will not.

  However, the communication circuit 63 b and the communication circuit 63 c are connected to the communication path between the connection unit 61 and the communication circuit 63 a. Therefore, at least one of the communication circuit 63b and the communication circuit 63c adversely affects the communication signal of the communication through the communication circuit 63a, and the communication between the connection device 60 and the control device 62 can not be normally performed. There is sex. As a result, there is a possibility that there may be a plurality of matching of the communication format in which the communication format is matched even by the communication via the other communication circuit despite the communication format being matched by the communication via one communication circuit. is there. Therefore, when increasing the number of times of establishment of communication by one communication circuit, the number of times of establishment of communication setting unit 71b initializes the number of times of establishment of communication by another communication circuit (zero clear in this embodiment).

  As shown in FIG. 5D, the communication establishment number setting unit 71b determines whether the communication establishment number (counter A) by the communication circuit 63a is 1 or more (step S211). When the communication establishment number of times (counter A) by the communication circuit 63a is 1 or more ("Yes" in step S211), the communication establishment number of times setting unit 71b determines the communication establishment number of times (counter B) by the communication circuit 63b and the communication circuit 63c. The number of times of communication establishment (counter C) due to the above is cleared to zero (step S212). Then, control proceeds to step S217. On the other hand, when the number of times of communication establishment (counter A) by the communication circuit 63a is zero (initial value) ("No" in step S211), the control proceeds to step S213.

  The communication establishment number setting unit 71b determines whether the communication establishment number (counter B) by the communication circuit 63b is 1 or more (step S213). When the communication establishment number of times (counter B) by the communication circuit 63b is 1 or more ("Yes" in step S213), the communication establishment number of times setting unit 71b determines the communication establishment number of times (counter A) by the communication circuit 63a and the communication circuit 63c. The number of times of communication establishment (counter C) due to the above is cleared to zero (step S214). Then, control proceeds to step S217. On the other hand, when the number of times of communication establishment (counter B) by the communication circuit 63b is zero (initial value) ("No" in step S213), the control proceeds to step S215.

  The communication establishment number setting unit 71b determines whether the communication establishment number (counter C) by the communication circuit 63c is 1 or more (step S215). When the communication establishment frequency (counter C) by the communication circuit 63c is 1 or more ("Yes" in step S215), the communication establishment frequency setting unit 71b determines the communication integration frequency (counter A) by the communication circuit 63a and the communication circuit 63b. Is cleared to zero (step S216). Then, control proceeds to step S217. On the other hand, when the number of times of communication establishment (counter C) by the communication circuit 63c is zero (initial value) (“No” in step S215), the control proceeds to step S217.

  In the example described above, for example, when the number of times of communication establishment (counter A) by the communication circuit 63a is increased (in the case of “Yes” in step S211), the number of times of communication establishment by the communication circuit 63b (Counter B) is cleared to zero (step S212). Also, for example, when the communication establishment frequency (counter B) by the communication circuit 63b is increased (in the case of “Yes” in step S213), the communication establishment frequency setting unit 71b is the communication integration frequency (counter A) by the communication circuit 63a. Is cleared to zero (step S214). As described above, even if there is a plurality of matches in the communication format, the communication establishment frequency setting unit 71b clears each other's communication establishment frequency to zero. As a result, erroneous determination of the connected device 60 by the connected device type determination unit 72 is reduced.

  The connected device type determination unit 72 sets, as the type of the connected device 60, the type of device to be communicated in the communication format of the communication circuit in which the communication establishment frequency set by the communication establishment frequency setting unit 71b is a predetermined number or more. Specifically, the connected device type determination unit 72 determines whether there is a counter having the number of times of communication establishment equal to or more than a predetermined number (step S217 shown in FIG. 5D). The predetermined number of times is not limited, and can be set to any number of times (for example, three times). If there is a predetermined number of times or more (in the case of “Yes” in step S217), the connected device type determination unit 72 determines the type of device to communicate in the communication format of the communication circuit corresponding to the counter The type of connected device 60 is determined (step S218).

  For example, when the communication establishment frequency (counter A) by the communication circuit 63a is equal to or more than a predetermined number of times (for example, 3 times), the connected device type determination unit 72 determines the type of device (connected device 60) connected to the connection unit 61. Is determined to be the device 60a. In this case, the number of times of communication establishment (counter B) by the communication circuit 63b and the number of times of communication establishment by the communication circuit 63c (counter C) are zero. If there is no counter equal to or more than the predetermined number of times (in the case of “No” in step S217), the control proceeds to step S221.

  The control device 62 determines whether a predetermined time has elapsed from the start of control shown in the flowchart of FIG. 5D (step S221). The predetermined time is a time for repeating the determination and the process of steps S211 to S217, and can be set to any time. When the predetermined time has elapsed (in the case of “Yes” in step S221), the control device 62 performs an error process (step S222). The control device 62 displays, for example, an error indicating that the device (connected device 60) connected to the connection unit 61 does not correspond to any of the device 60a, the device 60b and the device 60c and that communication is not possible. be able to. Then, control ends once. When the predetermined time has not elapsed (in the case of “No” in step S221), the control returns to step S211.

  On the other hand, when the process of step S218 is executed, the connected device type determination unit 72 determines the type of device (connected device 60) connected to the connection unit 61. In this case, the connected device type writing unit 73 preferably writes the type of the connected device 60 determined by the connected device type determination unit 72 in the storage device 65. Further, it is preferable that the connected device type writing unit 73 write the type of the connected device 60 determined by the connected device type determining unit 72 when the communication with the connected device 60 is first performed in the storage device 65. Thereby, the control device 62 can omit the determination of the type of the connected device 60 when communicating with the connected device 60 for the second and subsequent times, and can shorten the activation time and simplify the control. .

  In the present embodiment, the connected device type writing unit 73 writes the type of the connected device 60 determined by the connected device type determining unit 72 when the communication with the connected device 60 is initially performed (step S219). ). Further, the control device 62 stops the communication circuit not in use (step S220). Specifically, the control device 62 stops the communication circuit that communicates in a communication format different from the communication format of the connected device 60 determined by the connected device type determination unit 72. For example, it is assumed that the connection device 60 is the device 60a. In this case, the control device 62 permits communication via the communication circuit 63a, and prohibits communication via the communication circuit 63b and communication via the communication circuit 63c. Then, control ends once.

  In addition, after the type of the connected device 60 is determined, the connected device 60 may be changed. Therefore, when using the type of the connection device 60 stored in the storage device 65, the control device 62 preferably executes the control program according to the flowchart shown in FIG. Specifically, the control device 62 reads the type of the connected device 60 from the storage device 65 (step S31). Then, the control device 62 determines whether or not the type of the connected device 60 is determined (step S32).

  For example, the control device 62 allows only communication via the communication circuit corresponding to the communication format of the connection device 60 stored in the storage device 65, and tries to communicate with the connection device 60. For example, it is assumed that the type of the connected device 60 stored in the storage device 65 is the device 60a. In this case, the control device 62 permits communication via the communication circuit 63a, and prohibits communication via the communication circuit 63b and communication via the communication circuit 63c. When the communication format of the received data acquired when attempting to communicate with the connected device 60 matches the communication format of the communication circuit 63 a, the control device 62 is configured such that the connected device 60 actually connected to the connection unit 61 is a device It can be confirmed that it is 60a. In this case, after the type of the connected device 60 is determined, the connected device 60 is not changed, and the type of the connected device 60 is determined.

  On the other hand, when the communication format of the received data acquired when attempting to communicate with the connection device 60 does not match the communication format of the communication circuit 63 a, the control device 62 actually controls the connection device 60 connected to the connection unit 61. Is different from the device 60a. In this case, after the type of the connected device 60 is determined, the connected device 60 may be changed, and the type of the connected device 60 has not been determined.

  When the type of the connected device 60 is determined (in the case of “Yes” in step S32), the control device 62 uses the type of the connected device 60 read in step S31 (in the example described above, the device 60a). (Step S33). Further, the control device 62 stops the communication circuit not in use (same as step S220). Then, control ends once. On the other hand, when the type of the connected device 60 is not determined (in the case of “No” in step S32), the control device 62 performs a process of determining the type of the connected device 60 (step S34). The flowchart of the determination process is the same as the flowchart shown in FIGS. 5A to 5D, but the communication circuit (the communication circuit 63a in the above-described example) confirmed in step S32 can be omitted. Then, control ends once.

<Others>
The embodiment is not limited to the embodiment described above and shown in the drawings, and can be appropriately modified and implemented without departing from the scope of the invention. For example, the fuel cell 11a1 may be a polymer electrolyte fuel cell. The generator 11a may be an engine generator or the like.

<One example of effect>
The cogeneration device 10 according to aspect 1 includes the connection unit 61, the control device 62, and the plurality of communication circuits 63a, 63b, and 63c. Further, the control device 62 includes a communication trial unit 71 a, a communication establishment frequency setting unit 71 b, and a connected device type determination unit 72. The communication trial unit 71 a attempts to communicate with the connection device 60 a plurality of times in a state where the connection device 60 is communicably connected to the connection unit 61. The communication establishment number setting unit 71b communicates with one of the plurality of communication circuits 63a, 63b and 63c when the communication trial unit 71a attempts to communicate with the connected device 60 and the communication format of the received data is one of the plurality of communication circuits 63a, 63b, 63c. When the format is matched, the number of times of communication establishment by the one communication circuit is increased, and the number of times of communication establishment by other communication circuits is initialized. The connected device type determination unit 72 sets, as the type of the connected device 60, the type of device to be communicated in the communication format of the communication circuit in which the communication establishment frequency set by the communication establishment frequency setting unit 71b is a predetermined number or more.
According to the cogeneration device 10 according to the first aspect, when increasing the number of times of communication establishment by one communication circuit, the communication establishment number of times setting unit 71b initializes the number of times of communication establishment by other communication circuits. Therefore, even if there is a plurality of matching of the communication format, the communication establishment frequency setting unit 71b can initialize each other's communication establishment frequency, and reduce erroneous determination of the connected device 60 by the connected device type determination unit 72. Can.

According to the cogeneration device 10 of aspect 2, in the cogeneration device 10 of aspect 1, the control device 62 writes the type of the connected device 60 determined by the connected device type determination unit 72 into the storage device 65. The type writing unit 73 is provided. The connected device type writing unit 73 writes in the storage device 65 the type of the connected device 60 determined by the connected device type determination unit 72 when the communication with the connected device 60 is first performed.
In the cogeneration system 10 according to the aspect 2, when the control device 62 communicates with the connected device 60 for the second time or later, the determination of the type of the connected device 60 can be omitted, shortening the start time and simplifying the control. Can be implemented.

According to the cogeneration system 10 according to the mode 3, the cogeneration system 10 according to the mode 1 or the mode 2 includes one connection portion 61 to which a plurality of types of devices 60a, 60b, 60c are selectively connected.
The cogeneration system 10 according to aspect 3 can integrate a plurality of communication circuits 63a, 63b, 63c having different circuit characteristics into one connection portion 61, and simplifies the connection work of the plurality of types of devices 60a, 60b, 60c. And misconnection can be suppressed.

10: cogeneration device,
11: power generator, 30: system power supply,
60: Connection device,
60a, 60b, 60c: devices,
61: Connection,
62: Control device,
63a, 63b, 63c: communication circuit,
65: Storage device,
71a: Communication trial unit,
71b: Communication establishment frequency setting unit,
72: Connected device type determination unit,
73: Connected device type writing unit.

Claims (3)

A cogeneration system in which a power generation device is linked to a system power supply, recovers the exhaust heat generated with the power generation of the power generation device, and can communicate with a plurality of types of devices that can cooperate with each other,
A connection unit to which the plurality of types of devices having different communication types are selectively connected;
A control device capable of communicating with a connected device that is a device connected to the connection unit;
A plurality of communication circuits provided between the connection unit and the control device, for propagating communication signals between the connection device and the control device, and corresponding to a plurality of communication types of at least the plurality of types of devices; ,
Equipped with
The controller is
A communication trial unit that attempts to communicate with the connection device a plurality of times while the connection device is communicably connected to the connection unit;
When the communication format of the received data acquired when the communication trial unit attempts to communicate with the connected device matches the communication format of one communication circuit among the plurality of communication circuits, the one communication circuit A communication establishment number setting unit that increases the number of times of communication establishment due to the communication establishment and initializes the number of times of communication establishment by other communication circuits;
A connected device type determination unit that sets, as the type of the connected device, a type of device to be communicated in the communication format of the communication circuit in which the number of times of communication establishment set by the communication establishment number setting unit is a predetermined number or more;
Cogeneration device comprising The control device includes a connected device type writing unit that writes the type of the connected device determined by the connected device type determination unit in a storage device.
The cogeneration according to claim 1, wherein the connected device type writing unit writes the type of the connected device determined by the connected device type determination unit when communication is first performed with the connected device. apparatus.   The cogeneration apparatus according to claim 1 or 2, further comprising one connection part to which the plurality of types of devices are selectively connected.

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