JP2019154135A - Cogeneration apparatus - Google Patents

Abstract

To accurately and surely communicate with other connected device regardless of a kind of other connected device when a cogeneration device and other device are connected.SOLUTION: At least one or more transmission and reception circuits for a plurality of other devices have a resonance circuit for the other device that is provided between a connection terminal and a filter circuit for other device and takes out a signal of a desired frequency band narrower than a pass frequency band and corresponding to a specific communication frequency of a specific communication signal of other device to output the signal to a filter circuit for other device from a signal inputted from the connection terminal.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cogeneration apparatus.

  As one type of cogeneration apparatus, one disclosed in Patent Document 1 is known. As shown in FIG. 1 of Patent Document 1, in the cogeneration apparatus 10, the power generation apparatus 11 is connected to the system power supply 30, collects exhaust heat generated by the power generation of the power generation apparatus 11, and This is a cogeneration device that can communicate with other devices (hot water supply system 40 and hot water heater remote controller 45) that can cooperate with each other.

JP, 2006-207276, A

  In the above-described cogeneration apparatus, when there are a plurality of other apparatuses such as the hot water supply system 40 and the remote controller 45 for the water heater for each manufacturer, the cogeneration apparatus is connected so as to be able to communicate with the other apparatuses of the plurality of types. There is. At this time, the cogeneration device needs to communicate accurately and reliably with the other connected device regardless of the type of the other device with which the cogeneration device is connected.

  The present invention has been made to solve the above-described problems. When the cogeneration apparatus is connected to another apparatus, the connected other apparatus is connected regardless of the type of the other apparatus connected. The purpose is to communicate accurately and reliably with the device.

  In order to solve the above-described problem, the cogeneration apparatus according to claim 1 includes a plurality of types in which the power generation apparatus is connected to a system power supply, collects exhaust heat generated by power generation of the power generation apparatus, and can cooperate with each other. A cogeneration device that can communicate with another device, and the control device that controls the cogeneration device is connected to another device or / and another device operating device for operating the other device. A connection terminal to which a communication path for communicating a plurality of other device-specific communication signals having a specific communication frequency can be connected to another device or / and an operation device for another device. Are provided between the connection terminal and the microcomputer corresponding to each of a plurality of types of other devices, and are used for each of the other devices. A plurality of other device-specific transmission / reception circuits that respectively transmit and receive a plurality of other device-specific communication signals having different communication frequencies, each of the other-device transmission / reception circuits being capable of transmitting / receiving other device-specific communication signals. A communication IC for a device and a filter circuit for another device having a pass frequency band through which another device-specific communication signal can pass, and at least one of the plurality of other device transmission / reception circuits has a connection terminal And a filter circuit for the other device, and from the signal input from the connection terminal, extract a signal in a desired frequency band narrower than the pass frequency band and corresponding to the specific communication frequency of the other device specific communication signal A resonance circuit for other device that outputs to the filter circuit for other device is provided.

  According to this, the desired frequency band corresponding to the specific communication frequency of the other device specific communication signal is narrower than the pass frequency band of the other device filter circuit from the signal input from the connection terminal by the resonance circuit for the other device. Is output to the other device filter circuit and thus to the other device communication IC. As a result, each of the other device communication ICs can reliably receive a signal in a desired frequency band corresponding to a specific communication frequency of the other device communication IC among the signals input from the connection terminal. Therefore, even if the cogeneration device is connected to any type of other devices among multiple types of devices, the cogeneration device is connected regardless of the type of other device to which it is connected. It is possible to communicate accurately and reliably with other devices.

It is a schematic diagram showing an embodiment of a cogeneration system provided with a cogeneration device according to the present invention. It is a schematic diagram of the generator shown in FIG. It is a figure which shows the communication circuit of the 1st control apparatus (electric power generation device control apparatus) shown in FIG. It is a figure which shows an example of the resonance circuit shown in FIG. It is a flowchart for demonstrating the action | operation of a cogeneration apparatus. It is a figure for demonstrating the frequency characteristic of the communication circuit of the 1st control apparatus (electric power generation device control apparatus) shown in FIG. It is a figure which shows another example of the resonance circuit shown in FIG. It is a figure for demonstrating the frequency characteristic of the communication circuit provided with another example of the resonance circuit shown in FIG.

  Hereinafter, an embodiment of a cogeneration system 1 to which a cogeneration apparatus according to the present invention is applied will be described. As shown in FIG. 1, the cogeneration system 1 includes a cogeneration device 10 and a hot water supply system 40 (first hot water supply system).

  In the cogeneration apparatus 10, the power generation apparatus 11 is connected to the system power supply 30, collects exhaust heat generated by the power generation of the power generation apparatus 11, and other types of other apparatuses that can cooperate with each other (the hot water supply system 40, 140) and a cogeneration device that can communicate with each other. The cogeneration apparatus 10 includes a housing 10a, a power generation apparatus 11, a power supply board 13, a power generation apparatus control apparatus (hereinafter referred to as a first control apparatus, which corresponds to a “control apparatus” described in claims), and hot water storage. A tank 21 is provided. The housing 10 a houses the power generation device 11, the power supply board 13, the first control device 19, and the hot water tank 21. The power generator 11 generates electric power (AC power in the present embodiment), and includes a power generator 11a that generates DC power and a power converter 11b. As shown in FIG. 2, the generator 11a includes a fuel cell 11a1, an evaporation unit 11a2, and a reforming unit 11a3.

  The evaporating section 11a2 is heated by a combustion gas to be described later, evaporates the supplied reformed water to generate water vapor, and preheats the supplied raw fuel (reforming raw material). The evaporation section 11a2 mixes the steam generated in this way with the preheated reforming raw material and supplies a mixed gas to the reforming section 11a3. As reforming raw materials, there are gas fuels for reforming such as natural gas and LPG, and liquid fuels 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 a combustion gas to be described later and supplied with heat necessary for the steam reforming reaction, so that the reformed gas is generated from the mixed gas (reforming raw material and steam) supplied from the evaporation unit 11a2. Is generated and derived. The mixed gas reacts with a catalyst and is reformed to generate hydrogen gas and carbon monoxide gas (so-called steam reforming reaction). At the same time, a so-called carbon monoxide shift reaction occurs in which carbon monoxide and hydrogen produced by the steam reforming reaction react to transform into hydrogen gas and carbon dioxide. These generated gases (so-called reformed gas) are led out to the fuel electrode of the fuel cell 11a1.

  The fuel cell 11a1 generates power using fuel and oxidant gas. The fuel cell 11a1 is configured by laminating a fuel electrode, an air electrode (oxidant electrode), and a plurality of cells 11a1a made of electrolyte interposed between the two electrodes in the left-right direction in FIG. The fuel cell 11a1 of this embodiment is a solid oxide fuel cell, and uses zirconium oxide, which is a kind of solid oxide, as an electrolyte. Hydrogen, carbon monoxide, methane gas, or the like as fuel is supplied to the fuel electrode of the fuel cell 11a1. On the fuel electrode side of the cell 11a1a, a fuel channel 11a1b through which a reformed gas that is a fuel flows is formed. An air flow path 11a1c through which air (cathode air) as an oxidant gas flows is formed on the air electrode side of the cell 11a1a. Cathode air is supplied to the air flow path 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, the reaction shown in Chemical Formula 1 and Chemical Formula 2 below occurs at the fuel electrode, and the reaction shown in Chemical Formula 3 below occurs at the air electrode. 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 electrical energy.
(Chemical formula 1)
H ₂ + O ²⁻ → H ₂ O + 2e ⁻
(Chemical formula 2)
CO + O ²⁻ → CO ₂ + 2e ⁻
(Chemical formula 3)
1 / 2O ₂ + 2e ⁻ → O ²⁻

  The combustion gas is obtained by burning the reformed gas not used for power generation derived from the fuel flow path 11a1b with the oxidant gas (air) not used for power generation derived from the air flow path 11a1c.

  As shown in FIG. 1, the power conversion device 11 b converts a direct current supplied from the fuel cell 11 a 1 into an alternating current. The power converter 11b has a function of outputting the converted alternating current. One end of the electric wire 14 is connected to the power converter 11b, and the AC power of the power converter 11b is output to the electric wire 14. An electric load 15 is connected to the other end of the electric wire 14. The electric power output from the power converter 11b is supplied to the electric load 15 via the electric wire 14 as necessary. The electric load 15 is an electric appliance such as an electric lamp, an iron, a television, a washing machine, an electric kotatsu, an electric carpet, an air conditioner, and a refrigerator. The electric load 15 can supply power from the power generation device 11 and the system power supply 30 when the power transmission of the system power supply 30 is normal. The electrical load 15 and the switchboard 32 are disposed in a power usage place A1 (for example, indoors).

  On the electric wire 14, between the power converter 11b and the electric load 15, the other end of the power line 31 having one end connected to the system power source 30 is connected by the connecting portion 14a. A distribution board 32 is disposed on the power line 31. When the power consumption of the electrical load 15 exceeds the power generated by the cogeneration apparatus 10, the insufficient power is supplied from the system power supply 30 via the switchboard 32 from the power supply line 31.

  The power converter 11b also has a function of converting AC power from the system power supply 30 supplied via the power line 31 and the electric wire 14 into DC power and outputting the DC power. The DC power output from the power conversion device 11 b is output to the power supply board 13. The power supply board 13 converts the supplied DC power into predetermined DC power and supplies it to the first control device 19 and the auxiliary machine 10b. The auxiliary machine 10b is composed of a reformed water pump, a raw material pump, a temperature sensor of each part, etc. (not shown), which is necessary for operating the cogeneration apparatus 10 and is operated with a direct current.

  A current sensor 31 a is disposed on the power supply line 31 between the system power supply 30 and the switchboard 32. The current sensor 31a detects a current of power supplied from the system power supply 30 to the power converter 11b. A detection signal of the current detected by the current sensor 31 a is output to the first control device 19. In the present embodiment, the current sensor 31a is provided to detect the current of the system power supply 30, but a voltage sensor that detects the voltage supplied from the system power supply 30 to the power converter 11b is provided. You may make it carry out, and you may make it arrange | position the electric power sensor which detects the electric power supplied from the system power supply 30 to the power converter device 11b.

Further, the cogeneration device 10 includes a switch 14 c, a sensor 11 b 1, and a first control device 19.
The switch 14c is disposed on the electric wire 14 and between the connecting portion 14a and the power converter 11b, and electrically disconnects or connects the power converter 11b and the system power supply 30 by opening or closing the circuit. Is.

  The sensor 11b1 is disposed between the power converter 11b and the breaker 14d. More specifically, the sensor 11b1 is disposed between the switch 14c and the breaker 14d. The sensor 11b1 detects at least one of the voltage and current at the position where the sensor 11b1 is disposed, and detects whether or not the power generation apparatus 11 is supplied with power from the system power supply 30. In the present embodiment, the sensor 11b1 detects the voltage at the disposed position. A voltage detection signal detected by the sensor 11 b 1 is output to the first control device 19. The sensor 11b1 is a first detection device that is disposed between the breaker 14d and the power generation device 11 and detects at least one of a voltage and a current at the disposed position.

  Moreover, the breaker 14d is arrange | positioned on the electric wire 14 between the switch 14c and the connection part 14a (namely, between the system power supply 30 and the electric power generating apparatus 11). When power is transmitted from the system power supply 30 and an abnormal current (for example, overcurrent) flows through the wire 14 for some reason, the breaker 14d automatically opens the wire 14. ing. Thereby, the cogeneration apparatus 10 is avoided from damage caused by an abnormal current.

  The first control device 19 controls at least the power generation device 11 (fuel cell 11a1), and consequently controls the cogeneration device 10. Specifically, when power is supplied from the system power supply 30, the power generation amount of the fuel cell 11 a 1 is controlled by controlling the auxiliary machine 10 b so that the power consumption of the electric load 15 is achieved. At this time, when the power consumption of the electric load 15 exceeds the power generated by the fuel cell 11a1, the insufficient power is received from the system power supply 30 and compensated. In the case of a power failure, control is performed so that the amount of power generated by the fuel cell 11a1 is constant output power (for example, half of the rating (350W)).

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

The cogeneration apparatus 10 includes a power generator remote controller 25. The power generator remote controller 25 is a remote controller (first remote controller) that is communicably connected to the first control device 19 and operates the cogeneration device 10. The power generator remote controller 25 can display the operation status of the cogeneration device 10 such as the power generated by the power generator 11a, the amount of power used, and the amount of hot water remaining in the hot water tank 21.
The power generator remote controller 25 is also connected to the second control device 42 so as to communicate with each other. The power generator remote control 25 can also operate the water heater 41 and display the operating status.

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

  The hot water storage tank 21 stores hot water collected by heat exchange of exhaust heat of the power generation apparatus 11 (fuel cell 11a1). A hot water circulation circuit 22 for circulating hot water (hot water) in the hot water tank 21 is connected to the hot water tank 21. A heat exchanger 23 is disposed on the hot water circulation circuit 22. The heat exchanger 23 is connected to the other end of a flow path 23a, one end of which is connected to the outlet of the generator 11a from which the exhaust heat of the generator 11a is discharged. The heat exchanger 23 performs heat exchange 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 hot water circulates in the hot water circulation circuit 22 by driving a pump (not shown) during power generation of the cogeneration device 10, the heat generated by the cogeneration device 10 discharged through the flow path 23a is transferred to the heat exchanger 23. The hot and cold water is heated by collecting through the water.

For example, in the case of the cogeneration apparatus 10, the exhaust heat of the power generator 11a refers to exhaust heat of the fuel cell 11a1, exhaust heat of the reforming unit 11a3, and the like. However, the present invention is not limited to this, and any recoverable exhaust heat such as heat of the cogeneration apparatus 10 itself can be used.
Moreover, you may make it provide the hot water storage unit 20 as another unit of the cogeneration apparatus 10 out of the housing | casing 10a.

  The hot water storage tank 21 is provided with one columnar container, in which hot water is stored in a layered manner, that is, hot water in the upper part is the hottest and becomes lower as it goes to the lower part, and the hot water in the lower part is stored at the lowest temperature. It has become so. Hot hot water stored in the hot water tank 21 is led out from the upper part of the columnar container of the hot water tank 21, and water such as tap water (low temperature water) is columnar in the hot water tank 21 so as to replenish the derived amount. It is introduced from the lower part of the container. The hot water tank 21 may be configured such that tap water merges with the hot water drawn from the hot water tank 21. Thereby, the temperature of the hot water from the hot water storage tank 21 is lowered.

  The hot water storage tank 21 is connected to the other end of a hot water supply pipe 24 whose one end is connected to the hot water heater 41. Hot water in the hot water storage tank 21 can be supplied to the hot water heater 41 via the hot water supply pipe 24.

  The hot water supply system 40 includes a hot water heater 41, a hot water heater control device (hereinafter referred to as a second control device) 42, a power supply substrate 43, a hot water supply pipe 44, and a hot water heater remote controller 45.

  The water heater 41 is configured to supply hot water by heating the hot water introduced from the hot water storage tank 21 with a heat source. Examples of the heat source include a combustor that burns raw fuel, a heat exchanger, and an electric heater. In this 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 is configured to adjust the combustion of the combustor so that the temperature of hot water detected by a temperature sensor (not shown) becomes a set hot water temperature. Although not shown, tap water is joined to the water heater 41. Thereby, it is also possible to cool down hot water.

  The second control device 42 adjusts the hot water temperature derived from the hot water heater 41 as described above. The second control device 42 is connected to the first control device 19 so as to communicate with each other.

  The power supply substrate 43 supplies driving power to the water heater 41 and the second control device 42. The power supply board 43 is supplied with AC power from the system power supply 30 through the power distribution board 32 distributed by the switchboard 32. The power supply substrate 43 converts the supplied AC power into predetermined DC power and supplies it to the water heater 41 and the second control device 42.

  The hot water supply pipe 44 is connected to a plurality of hot water use devices A2a installed in a hot water use place A2 (for example, indoors) where hot water supplied from the water heater 41 is used as hot water. Examples of the hot water using equipment include a bathtub, shower, kitchen (kitchen faucet), and washroom (toilet faucet). The hot water supply pipe 44 is connected to a heat utilization device A2b installed at a hot water use place A2 that uses hot water supplied from the water heater 41 as a heat source. Examples of the heat utilization device include bathroom heating, floor heating, and a hot water bathing mechanism.

The water heater remote controller 45 is a remote controller (second remote controller) that is connected to the second control device 42 so as to communicate with each other and that operates the water heater 41. The water heater remote control 45 displays the operation status of the water heater 41 such as the hot water temperature.
The water heater remote controller 45 is also connected to the first control device 19 so as to communicate with each other. The water heater remote controller 45 can also operate the cogeneration apparatus 10 and display the operation status.

  Further, the communication configuration of the above-described cogeneration system 1 will be described with reference to FIGS. 1 and 3. The first control device 19 can be connected to the power generator remote controller 25 via the first communication path 51. The first communication path 51 is a communication path that is electrically connected to the power generator remote controller 25, and transmits and receives (communications) the first PLC signal to and from the power generator remote controller 25. One end of the first communication path 51 is connected to a connection terminal (not shown) of the power generator remote controller 25. The other end of the first communication path 51 is connected to the connection terminal 19 a of the first control device 19. The connection terminal 19a is a connection portion that is electrically connected to another device (described later, for example, a hot water supply system 40). In the present embodiment, only one connection portion is provided, and a plurality of types of other devices can be connected. The first communication path 51 is also a power supply path for communicating the first PLC signal and supplying a power supply voltage.

  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 (second control device 42), which is another device, and sends a second PLC signal to the hot water supply system 40 (second control device 42). Send and receive. One end of the second communication path 52 is connected to a connection terminal (not shown) of the second control device 42. The other end of the second communication path 52 is connected to the connection terminal 19 a of the first control device 19. The second communication path 52 is also a power supply path for communicating the second PLC signal and supplying a power supply voltage.

  The third communication path 53 is a communication path connected to a hot water heater remote controller 45 for operating the hot water supply system 40 (an operation apparatus for another apparatus for operating another apparatus), and is a remote controller for the hot water heater. The third PLC signal is transmitted to and received from 45. One end of the third communication path 53 is connected to a connection terminal (not shown) of the hot water supply remote controller 45. 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 that communicates the third PLC signal and supplies a power supply voltage.

  In the present embodiment, the third communication path 53 is connected in the middle of the second communication path 52, but the second communication path 52 and the third communication path 53 are connected to the connection terminal 19 a of the first control device 19. You may make it connect directly. Each of the paths 51, 52, 53 is supplied with a DC voltage. Each path 51, 52, 53 is preferably composed of two lines.

  As described above, the connection terminal 19a is a communication path connected to another device or / and another device operation device for operating the other device, and is used for the other device or / and other device operation. A communication path (electric wire) for communicating a plurality of other device specific communication signals (PLC signals in the present embodiment) having a specific communication frequency can be connected to the device. Here, when the manufacturer is the same, the other device specific communication signal of the other device and the other device specific communication signal of the other device operating device can be shared. Even if the manufacturer is the same, the other device specific communication signal of the other device and the other device specific communication signal of the other device operating device may be different.

  The other devices are devices that can cooperate with the cogeneration device 10 and can communicate with each other. In this embodiment, although it is the hot water supply system 40, other power generation units, such as a solar power generation unit, a fuel cell unit, and a storage battery system, may be sufficient. In the present embodiment, the power generator remote controller 25 is connected to the cogeneration device 10 (first control device 19), but may not be connected.

  The first control device 19 includes a connection terminal 19a, a microcomputer 19b, a first transmission / reception circuit 19c, a second transmission / reception circuit 19d, a third transmission / reception circuit 19e, a fourth transmission / reception circuit 19f, a fifth transmission / reception circuit 19g, a diode bridge circuit 19h, a power source. A circuit 19i and a switching device 19k are provided. The microcomputer 19b controls the cogeneration apparatus 10 in an integrated manner.

  The first transmission / reception circuit 19c is provided between the connection terminal 19a and the microcomputer 19b, and transmits / receives a first PLC (Power Line Communication) signal. The first transmission / reception circuit 19c includes a first BPF (band pass filter) 19c1, a first communication IC 19c2, a regulator 19c3, and a first LPF (low pass filter) 19c4. The first BPF 19c1 is connected to the connection terminal 19a via the switching device 19k.

An LPF (low-pass filter) is a low-pass filter, and is a filter that attenuates a component having a frequency lower than the cut-off frequency and attenuates a component having a frequency higher than the cut-off frequency. The LPF includes, for example, a capacitor in parallel with the input signal and a resistor in series with the input signal. The LPF may be composed of a coil and a capacitor.
The BPF (band pass filter) is preferably configured in the same manner as a second BPF 19d1 described later.
The HPF (High Pass Filter) is a high-pass filter, and is a filter that attenuates a component having a frequency higher than the cut-off frequency and attenuates a component having a frequency lower than the cut-off frequency. The HPF includes, for example, a resistor in parallel with the input signal and a capacitor in series with the input signal.

  The first BPF 19c1 transmits the first PLC signal. The first communication IC 19c2 is a PLC modem element. The first communication IC 19c2 receives the first PLC signal from the first BPF 19c1, demodulates the first PLC signal into first communication data, and outputs it to the input port 19b1a of the microcomputer 19b. The first communication IC 19c2 receives the first communication data from the output port 19b1b of the microcomputer 19b, modulates the first communication data, and outputs the first PLC signal to the first BPF 19c1. The first communication IC 19c2 is supplied with a power supply voltage from the power supply circuit 19i.

  The regulator 19c3 is for supplying DC power to the power generator remote controller 25. The regulator 19c3 changes (steps up or down) the DC power from the power supply circuit 19i and outputs remote control power (remote control power supply voltage). . The first LPF 19c4 is provided between the regulator 19c3 and the switching device 19k (connection terminal 19a), blocks each PLC signal, and transmits the remote control power supply voltage. The first transmission / reception circuit 19c is provided with a coil (not shown) for superimposing (inputting) the first PLC signal on the power supply voltage for remote control.

  The second transmission / reception circuit 19d is provided between the connection terminal 19a and the microcomputer 19b, and transmits / receives a second PLC signal. The second transmission / reception circuit 19d is provided between the connection terminal 19a and the microcomputer 19b for each of a plurality of types of other devices, and is used for each of the other devices and has different communication frequencies. It is a transmission / reception circuit for other apparatuses which transmits / receives the 2nd PLC signal which is a communication signal.

  The second transmission / reception circuit 19d includes a second BPF (band pass filter) 19d1, a second communication IC 19d2, and a second resonance circuit 19d3. The second resonance circuit 19d3 is connected to the diode bridge circuit 19h connected to the connection terminal 19a. The diode bridge circuit 19h is a circuit that rectifies current by combining diodes, and converts an alternating current into a direct current, or allows a plus or minus of a direct current power source to be connected to either.

The second communication IC 19d2 is a PLC modem element. The second communication IC 19d2 is a communication IC for other devices capable of transmitting and receiving a second PLC signal (other device specific communication signal) having a specific communication frequency among PLC signals that are a plurality of other device specific communication signals. The specific communication frequency of the second communication IC 19d2 is the second specific communication frequency f2 (kHz).
The second communication IC 19d2 receives the second PLC signal from the second BPF 19d1, demodulates the second PLC signal into second communication data, and outputs it to the input port 19b2a of the microcomputer 19b. The second communication IC 19d2 receives the second communication data from the output port 19b2b of the microcomputer 19b, modulates the second communication data into a second PLC signal, and outputs the second PLC data to the second BPF 19d1. The second communication IC 19d2 is supplied with a power supply voltage from the power supply circuit 19i.

The second BPF 19d1 transmits the second PLC signal. The second BPF 19d1 is a filter circuit for other devices having a pass frequency band through which the second PLC signal (other device specific communication signal) can pass. The pass frequency band through which the second PLC signal can pass is the second pass frequency band FB12 (kHz).
As shown in FIG. 4, the second BPF 19d1 has a configuration in which, for example, a resistor R21 and a capacitor C21 are connected in series to the signal source, and a resistor R22 and a capacitor C22 are connected in parallel to the signal source. The resistor R21 and the capacitor C21 are connected in series to the signal line LN1. The resistor R22 and the capacitor C22 are connected in parallel between the signal line LN1 and the ground line LN2. The second pass frequency band FB12 in which the second PLC signal (other device specific communication signal) can pass through the second BPF 19d1 can be defined from the resistance values of the resistors R21 and R22 and the capacitances of the capacitors C21 and C22. .

  The second resonance circuit 19d3 is provided between the connection terminal 19a (diode bridge circuit 19h) and the second BPF 19d1 (filter device for other devices), and is narrower than the second pass frequency band FB12 from the signal input from the connection terminal 19a. In addition, a signal of the second desired frequency band FB22 that is a desired frequency band corresponding to the second specific communication frequency f2 (specific communication frequency) of the second PLC signal (other device specific communication signal) is extracted and output to the second BPF 19d1. (Resonant circuit for other devices). The second desired frequency band FB22 may completely overlap the second pass frequency band FB12, or may partially overlap so that the second specific communication frequency f2 is included in the overlapping part.

The second resonance circuit 19d3 includes a parallel resonance circuit that amplifies a signal in a first type predetermined frequency band including the first type resonance frequency and attenuates a signal outside the first type predetermined frequency band. The first type predetermined frequency band of the second resonance circuit 19d3 is a second first type predetermined frequency band FB32.
The second first-type predetermined frequency band FB32 is provided in the second transmission / reception circuit 19d (transmission / reception circuit for other apparatus) provided with the second resonance circuit 19d3 (resonance circuit for the other apparatus). It includes the second specific communication frequency f2 (specific communication frequency) relating to the communication IC 19d2 (communication IC for other devices) and is set to match the second desired frequency band FB22 (desired frequency band). Is preferred.

  As shown in FIG. 4, the second resonance circuit 19d3 has a configuration in which, for example, a resistor R1, a capacitor C1, and a coil L1 are connected in parallel to the signal source. That is, the resistor R1, the capacitor C1, and the coil L1 are connected in parallel between the signal line LN1 and the ground line LN2. From the resistance value of the resistor R1, the capacitance of the capacitor C1, and the inductance of the coil L1, the second first-type resonance frequency f12 and the second first-type predetermined frequency band FB32, which are the resonance frequencies of the second resonance circuit 19d3, are obtained. Can be prescribed.

  The third transmission / reception circuit 19e is provided between the connection terminal 19a and the microcomputer 19b, and transmits / receives a third PLC signal. The third transmission / reception circuit 19e is provided between the connection terminal 19a and the microcomputer 19b corresponding to each of a plurality of other devices, and is used for each of the other devices and has a different communication frequency from each other. It is the transmission / reception circuit for other apparatuses which transmits / receives the 3rd PLC signal which is a communication signal.

  The third transmission / reception circuit 19e includes a third BPF (band pass filter) 19e1, a third communication IC 19e2, and a third resonance circuit 19e3. The third resonance circuit 19e3 is connected to a diode bridge circuit 19h connected to the connection terminal 19a.

The third communication IC 19e2 is a PLC modem element. The third communication IC 19e2 is a communication IC for other devices capable of transmitting and receiving a third PLC signal (other device specific communication signal) having a specific communication frequency among PLC signals that are a plurality of other device specific communication signals. The specific communication frequency of the third communication IC 19e2 is the third specific communication frequency f3 (kHz).
The third communication IC 19e2 receives the third PLC signal from the third BPF 19e1, demodulates the third PLC signal into third communication data, and outputs it to the input port 19b3a of the microcomputer 19b. In addition, the third communication IC 19e2 receives the third communication data from the output port 19b3b of the microcomputer 19b, modulates it into a third PLC signal, and outputs it to the third BPF 19e1. The third communication IC 19e2 is supplied with the power supply voltage from the power supply circuit 19i.

The third BPF 19e1 transmits the third PLC signal. The third BPF 19e1 is a filter circuit for other devices having a pass frequency band through which the third PLC signal (other device specific communication signal) can pass. The pass frequency band through which the third PLC signal can pass is the third pass frequency band FB13 (kHz).
The third BPF 19e1 is configured in the same manner as the second BPF 19d1 (see FIG. 4). The third pass frequency band FB13 in which the third PLC signal (other device specific communication signal) can pass through the third BPF 19e1 can be defined from the resistance values of the resistors R21 and R22 and the capacitances of the capacitors C21 and C22. .

  The third resonance circuit 19e3 is provided between the connection terminal 19a and the third BPF 19e1 (filter circuit for other devices), and is narrower than the third pass frequency band FB13 and the third PLC signal (others) from the signal input from the connection terminal 19a. A signal in the third desired frequency band FB23 that is a desired frequency band corresponding to the third specific communication frequency f3 (specific communication frequency) of the device specific communication signal) is extracted and output to the third BPF 19e1 (resonance for other devices) circuit). The third desired frequency band FB23 may completely overlap the third pass frequency band FB13, or may partially overlap so that the third specific communication frequency f3 is included in the overlapping part.

The third resonance circuit 19e3 includes a parallel resonance circuit that amplifies a signal in a first type predetermined frequency band including the first type resonance frequency and attenuates a signal outside the first type predetermined frequency band. The first type predetermined frequency band of the third resonance circuit 19e3 is a third first type predetermined frequency band FB33.
The third first-type predetermined frequency band FB33 is provided in the third transmission / reception circuit 19e (transmission / reception circuit for other apparatus) provided with the third resonance circuit 19e3 (resonance circuit for the other apparatus). It includes the third specific communication frequency f3 (specific communication frequency) related to the communication IC 19e2 (communication IC for other devices) and is set to match the third desired frequency band FB23 (desired frequency band). Is preferred.

  The third resonance circuit 19e3 is configured similarly to the second resonance circuit 19d3 (see FIG. 4). From the resistance value of the resistor R1, the electrostatic capacitance of the capacitor C1, and the inductance of the coil L1, the third first-type resonance frequency f13 and the third first-type predetermined frequency band FB33, which are the resonance frequencies of the third resonance circuit 19e3, are obtained. Can be prescribed.

  The fourth transmission / reception circuit 19f is provided between the connection terminal 19a and the microcomputer 19b, and transmits / receives a fourth PLC signal. The fourth transmission / reception circuit 19f is provided between the connection terminal 19a and the microcomputer 19b corresponding to each of a plurality of types of other devices, and is used for each of the other devices and has different communication frequencies. It is the transmission / reception circuit for other apparatuses which transmits / receives the 4th PLC signal which is a communication signal.

  The fourth transmission / reception circuit 19f includes a fourth BPF (band pass filter) 19f1, a fourth communication IC 19f2, and a fourth resonance circuit 19f3. The fourth resonance circuit 19f3 is connected to the diode bridge circuit 19h connected to the connection terminal 19a.

The fourth communication IC 19f2 is a PLC modem element. The fourth communication IC 19f2 is a communication IC for other devices that can transmit and receive a fourth PLC signal (other device specific communication signal) having a specific communication frequency among PLC signals that are a plurality of other device specific communication signals. The specific communication frequency of the fourth communication IC 19f2 is the fourth specific communication frequency f4 (kHz).
The fourth communication IC 19f2 receives the fourth PLC signal from the fourth BPF 19f1, demodulates the fourth PLC signal into fourth communication data, and outputs the fourth communication signal to the input port 19b4a of the microcomputer 19b. The fourth communication IC 19f2 receives the fourth communication data from the output port 19b4b of the microcomputer 19b, modulates it into a fourth PLC signal, and outputs it to the fourth BPF 19f1. The fourth communication IC 19f2 is supplied with the power supply voltage from the power supply circuit 19i.

The fourth BPF 19f1 transmits the fourth PLC signal. The fourth BPF 19f1 is a filter circuit for other devices having a pass frequency band through which the fourth PLC signal (other device specific communication signal) can pass. The pass frequency band through which the fourth PLC signal can pass is the fourth pass frequency band FB14 (kHz).
The fourth BPF 19f1 is configured similarly to the second BPF 19d1 (see FIG. 4). The fourth pass frequency band FB14 in which the fourth PLC signal (other device specific communication signal) can pass through the fourth BPF 19f1 can be defined from the resistance values of the resistors R21 and R22 and the electrostatic capacities of the capacitors C21 and C22. .

  The fourth resonance circuit 19f3 is provided between the connection terminal 19a and the fourth BPF 19f1 (filter circuit for other devices), and is narrower than the fourth pass frequency band FB14 and the fourth PLC signal (others) from the signal input from the connection terminal 19a. A signal in the fourth desired frequency band FB24, which is a desired frequency band corresponding to the fourth specific communication frequency f4 (specific communication frequency) of the device specific communication signal), is extracted and output to the fourth BPF 19f1 (resonance for other devices) circuit). The fourth desired frequency band FB24 may completely overlap the fourth pass frequency band FB14, or may partially overlap so that the fourth specific communication frequency f4 is included in the overlapping part.

The fourth resonance circuit 19f3 includes a parallel resonance circuit that amplifies signals in the first type predetermined frequency band including the first type resonance frequency and attenuates signals outside the first type predetermined frequency band. The first type predetermined frequency band of the fourth resonance circuit 19f3 is a fourth first type predetermined frequency band FB34.
The fourth first-type predetermined frequency band FB34 is provided in the fourth transmission / reception circuit 19f (transmission / reception circuit for other apparatus) in which the fourth resonance circuit 19f3 (resonance circuit for the other apparatus) is disposed. It includes the fourth specific communication frequency f4 (specific communication frequency) related to the communication IC 19f2 (communication IC for other devices) and is set to match the fourth desired frequency band FB24 (desired frequency band). Is preferred.

  The fourth resonance circuit 19f3 is configured in the same manner as the second resonance circuit 19d3 (see FIG. 4). Based on the resistance value of the resistor R1, the capacitance of the capacitor C1, and the inductance of the coil L1, the fourth first-type resonance frequency f14 and the fourth first-type predetermined frequency band FB34, which are the resonance frequencies of the fourth resonance circuit 19f3, are obtained. Can be prescribed.

  The fifth transmission / reception circuit 19g is provided between the connection terminal 19a and the microcomputer 19b, and transmits / receives a fifth PLC signal. The fifth transmission / reception circuit 19g is provided between the connection terminal 19a and the microcomputer 19b for each of a plurality of other devices, and is used for each of the other devices and has a different communication frequency. It is the transmission / reception circuit for other apparatuses which transmits / receives the 5th PLC signal which is a communication signal.

  The fifth transmission / reception circuit 19g includes a fifth BPF (band pass filter) 19g1, a fifth communication IC 19g2, and a fifth resonance circuit 19g3. The fifth resonance circuit 19g3 is connected to the diode bridge circuit 19h connected to the connection terminal 19a.

The fifth communication IC 19g2 is a PLC modem element. The fifth communication IC 19g2 is a communication IC for other devices capable of transmitting and receiving a fifth PLC signal (other device specific communication signal) having a specific communication frequency among PLC signals that are a plurality of other device specific communication signals. The specific communication frequency of the fifth communication IC 19g2 is the fifth specific communication frequency f5 (kHz).
The fifth communication IC 19g2 receives the fifth PLC signal from the fifth BPF 19g1, demodulates the fifth PLC signal into fifth communication data, and outputs it to the input port 19b5a of the microcomputer 19b. The fifth communication IC 19g2 receives the fifth communication data from the output port 19b5b of the microcomputer 19b, modulates the fifth communication data into a fifth PLC signal, and outputs the fifth PLC signal to the fifth BPF 19g1. The fifth communication IC 19g2 is supplied with the power supply voltage from the power supply circuit 19i.

The fifth BPF 19g1 transmits the fifth PLC signal. The fifth BPF 19g1 is a filter circuit for other devices having a pass frequency band through which the fifth PLC signal (other device specific communication signal) can pass. The pass frequency band through which the fifth PLC signal can pass is the fifth pass frequency band FB15 (kHz).
The fifth BPF 19g1 is configured in the same manner as the second BPF 19d1 (see FIG. 4). The fifth pass frequency band FB15 in which the fifth PLC signal (other device specific communication signal) can pass through the fifth BPF 19g1 can be defined from the resistance values of the resistors R21 and R22 and the capacitances of the capacitors C21 and C22. .

  The fifth resonance circuit 19g3 is provided between the connection terminal 19a and the fifth BPF 19g1 (filter circuit for other devices). From the signal input from the connection terminal 19a, the fifth resonance circuit 19g3 is narrower than the fifth pass frequency band FB15 and has a fifth PLC signal (others). A signal in the fifth desired frequency band FB25, which is a desired frequency band corresponding to the fifth specific communication frequency f5 (specific communication frequency) of the device specific communication signal), is extracted and output to the fifth BPF 19g1 (resonance for other devices) circuit). The fifth desired frequency band FB25 may completely overlap the fifth pass frequency band FB15, or may partially overlap so that the fifth specific communication frequency f5 is included in the overlapping part.

The fifth resonance circuit 19g3 includes a parallel resonance circuit that amplifies signals in the first type predetermined frequency band including the first type resonance frequency and attenuates signals outside the first type predetermined frequency band. The first type predetermined frequency band of the fifth resonance circuit 19g3 is a fifth first type predetermined frequency band FB35.
The fifth first-type predetermined frequency band FB35 is provided in the fifth transmission / reception circuit 19g (transmission / reception circuit for other apparatus) in which the fifth resonance circuit 19g3 (resonance circuit for the other apparatus) is provided. It includes the fifth specific communication frequency f5 (specific communication frequency) related to the communication IC 19g2 (communication IC for other apparatus) and is set to match the fifth desired frequency band FB25 (desired frequency band). Is preferred.

The fifth resonance circuit 19g3 is configured similarly to the second resonance circuit 19d3 (see FIG. 4). Based on the resistance value of the resistor R1, the capacitance of the capacitor C1, and the inductance of the coil L1, the fifth first-type resonance frequency f15 and the fifth first-type predetermined frequency band FB35, which are the resonance frequencies of the fifth resonance circuit 19g3, are obtained. Can be prescribed.
The desired frequency bands FB22 to FB25 are set so as not to overlap each other.

  The first to fifth communication ICs 19c2 to 19g2 are dedicated communication ICs set for each communication data. In particular, the second to fifth communication ICs 19d2 to 19g2 are dedicated communication ICs set for each type of other device. For example, the second communication IC 19d2 is a dedicated communication IC for the hot water supply system 40, and the third communication IC 19e2 is a dedicated communication IC for the hot water supply system 140 (second hot water supply system) that is different from the hot water supply system 40. . If the manufacturer is different, the communication data protocol and the specific communication frequency of the PLC signal are also different for each manufacturer.

  The power supply circuit 19i regulates (steps down) the voltage of the power supply 19i1, and supplies the reduced voltage to the communication ICs 19c2, 19d2, 19e2, 19f2, 19g2, and the regulator 19c3.

The switching device 19k has a first connection state in which the connection terminal 19a is connected to the first transmission / reception circuit 19c, and a second connection state in which the connection terminal 19a is connected to at least one of the second transmission / reception circuit 19d to the fifth transmission / reception circuit 19g. The connection state can be switched according to an instruction (switching signal) from the microcomputer 19b. For example, when transmitting a signal from the microcomputer 19b, the microcomputer 19b switches the switching device 19k according to the transmission destination. When the signal is not transmitted from the microcomputer 19b, the microcomputer 19b switches the switching device 19k to the second connection state (communication state with other devices). In this case, the microcomputer 19b may switch the switching device 19k to the first connection state only when the microcomputer 19b is not in a communication state with another device.
Further, the switching device 19k may be omitted.

  The first PLC signal is a signal that can be superimposed on the first communication path 51 (power line), and is a PLC for communicating between the cogeneration device 10 (first control device 19) and the power generator remote control 25. Signal. The first communication data is data communicated between the cogeneration device 10 and the power generation device remote controller 25.

  The second PLC signal is a signal that can be superimposed on the second communication path 52 and / or the third communication path 53 (power line), and the cogeneration apparatus 10 (first control apparatus 19) and the hot water supply system 40 (second control apparatus). 42) and / or a PLC signal for communication between the cogeneration device 10 (first control device 19) and the remote controller 45 for hot water heater. The second communication data is data communicated between the cogeneration device 10 (first control device 19) and the hot water supply system 40 (second control device 42 and / or the hot water heater remote controller 45).

  The third PLC signal is a signal that can be superimposed on the power line, and is a PLC signal for causing communication between the cogeneration device 10 (first control device 19) and the hot water supply system 140 (second control device 142). The third communication data is data communicated between the cogeneration device 10 (the first control device 19) and the hot water supply system 140 (the second control device 142 and / or the hot water heater remote controller (not shown)). .

  The fourth PLC signal is a signal that can be superimposed on the power line, and the cogeneration device 10 (first control device 19) and a third hot water supply system (not shown) (the first hot water supply system and the second hot water supply system described above are manufactured by the manufacturer). It is a PLC signal for communicating with a different hot water supply system. The fourth communication data is data communicated between the cogeneration device 10 (first control device 19) and the third hot water supply system (control device (not shown) and / or remote controller for hot water heater (not shown)). It is.

The fifth PLC signal is a signal that can be superimposed on the power line, and the cogeneration device 10 (first control device 19) and a fourth hot water supply system (not shown) are different from the first to third hot water supply systems. It is a PLC signal for communicating with the system. The fifth communication data is data communicated between the cogeneration device 10 (first control device 19) and the fourth hot water supply system (control device (not shown) and / or remote controller for hot water heater (not shown)). It is.
Further, LPF (low pass filter) or HPF (high pass filter) may be used in place of each BPF described above. Instead of the above-mentioned LPF, BPF or HPF may be used.

Next, the operation of the above-described cogeneration apparatus 10 will be described with reference to the flowchart shown in FIG.
The hot water supply system 140 (host side), which is another device, transmits a modulated signal (third PLC signal) (step S102). The transmitted third PLC signal is input to the cogeneration apparatus 10 (step S104). At this time, the switching device 19k is switched to the second connection state.

  The input signal (third PLC signal) is supplied (input) to the second transmission / reception circuit 19d to the fifth transmission / reception circuit 19g (step S106). At this time, the third PLC signal passes only through the third resonance circuit 19e3 and is supplied to the third BPF 19e1. The third PLC signal does not pass through the second resonance circuit 19d3 and is not supplied to the second BPF 19d1. The third PLC signal does not pass through the fourth resonance circuit 19f3 and is not supplied to the fourth BPF 19f1. The third PLC signal does not pass through the fifth resonance circuit 19g3 and is not supplied to the fifth BPF 19g1.

  The third PLC signal has a third specific communication frequency f3 (specific communication frequency). As shown in FIG. 6, the band through which the third PLC signal can pass corresponds to the third specific communication frequency f3. Only the third desired frequency band FB23, that is, the third first-type predetermined frequency band FB33. In other words, the third PLC signal cannot pass through a band other than the third desired frequency band FB23, that is, the third first-type predetermined frequency band FB33. The third PLC signal includes the second desired frequency band FB22 corresponding to the second specific communication frequency f2, that is, the second first type predetermined frequency band FB32, and the fourth desired frequency band FB24 corresponding to the fourth specific communication frequency f4. That is, it cannot pass through the fourth first-type predetermined frequency band FB34.

  In this way, only the necessary communication signal can pass through the resonance circuit corresponding to the signal and thus only the BPF (step S108). Then, a signal (third PLC signal) that has passed through the third BPF 19e1 is input to the third communication IC 19e2 (step S110). Further, the third communication IC 19e2 demodulates the third PLC signal into third communication data and outputs it to the microcomputer 19b (step S112).

Further, although not shown, the power generator remote controller 25 includes a communication circuit, like the first control device 19. Similar to the second transmission / reception circuit 19d, this communication circuit is a circuit that transmits and receives the first PLC signal, and includes a BPF, a communication IC, and the like.
Further, as shown in FIG. 3, the second control device 42 includes a communication circuit 42a and a remote control DC power source 42b. The communication circuit 42a is a communication circuit capable of transmitting and receiving with the second transmission / reception circuit 19d. The remote control DC power supply 42 b supplies DC power to the hot water supply remote control 45.

Similarly to the power generator remote controller 25, the water heater remote controller 45 also includes a communication circuit, and transmits and receives the second PLC signal.
Moreover, the 2nd control apparatus 142 (hot-water supply system 140) is provided with the communication circuit 142a at least, as shown in FIG. The communication circuit 42a is a communication circuit capable of transmitting and receiving with the third transmission / reception circuit 19e.

  As is clear from the above description, in the cogeneration apparatus 10 according to the present embodiment, the power generation apparatus 11 is connected to the system power supply 30, collects the exhaust heat generated by the power generation of the power generation apparatus 11, and This is a cogeneration apparatus 10 that can communicate with a plurality of types of hot water supply systems 40 and 140 (other apparatuses) that can cooperate with each other. The first control device 19 (control device) for controlling the cogeneration device 10 is connected to the hot water supply system 40,140 or / and the hot water supply remote controller 45 (operating device for other device) for operating the hot water supply system 40,140. Second and third PLC signals (a plurality of other devices) having specific communication frequencies f2-f3 with the hot water supply systems 40, 140 and / or the hot water supply remote controller 45, respectively. A connection terminal 19a to which communication paths 52 and 53 for communicating a specific communication signal) can be connected, a microcomputer 19b for overall control of the cogeneration apparatus 10, and a connection terminal 19a corresponding to each of a plurality of types of hot water supply systems 40 and 140. And the microcomputer 19b are respectively used for the hot water supply systems 40 and 140 and are connected to each other. Credit frequency is provided with a plurality of different second-a second 5PLC signal and a second reception circuit for transmission and reception respectively 19d- fifth transceiver circuit 19 g (more other devices for transmitting and receiving circuit), a. The second transmission / reception circuit 19d to the fifth transmission / reception circuit 19g include a second to fifth communication IC 19d2-19g2 (communication IC for other devices) and a second to fifth PLC that can transmit and receive a plurality of second to fifth PLC signals, respectively. 2nd BPF19d1-5th BPF19g1 (filter circuit for other devices) each provided with 2nd-5th passage frequency band FB12-FB15 which can pass a signal, respectively. At least one of the second transmission / reception circuit 19d to the fifth transmission / reception circuit 19g is provided between the connection terminal 19a and the second BPF 19d1 to the fifth BPF 19g1, and the second to fifth passes from the signal input from the connection terminal 19a. Extracting signals of the second desired frequency band FB22 to the fifth desired frequency band FB25 (desired frequency band) that are narrower than the frequency band FB12-FB15 and correspond to the specific communication frequency f2-f5 of the second to fifth PLC signals The second resonance circuit 19d3 to the fifth resonance circuit 19g3 (resonance circuit for other devices) that outputs to the second BPF 19d1 to the fifth BPF 19g1 are provided.

  According to this, the second resonance circuit 19d3 to the fifth resonance circuit 19g3 are narrower than the second to fifth pass frequency bands FB12 to FB15 of the second BPF 19d1 to the fifth BPF 19g1 from the signal input from the connection terminal 19a and A signal in the second desired frequency band FB22-fifth desired frequency band FB25 corresponding to the specific communication frequency f2-f5 of the fifth PLC signal is extracted and output to the second BPF 19d1-fifth BPF 19g1 and then to the second-fifth communication IC 19d2-19g2. To do. As a result, each of the second to fifth communication ICs 19d2-19g2 has a second desired signal corresponding to the specific communication frequency f2-f5 of the second to fifth communication ICs 19d2-19g2 among the signals input from the connection terminal 19a. A signal in the frequency band FB22 to the fifth desired frequency band FB25 can be reliably received. Therefore, even if the cogeneration apparatus 10 is connected to any type of hot water supply system 40, 140 among the plurality of types of hot water supply systems 40, 140, the cogeneration apparatus 10 is connected to the hot water supply system 40, Regardless of the type of 140, it is possible to accurately and reliably communicate with the connected hot water supply systems 40 and 140.

In the present embodiment, the second resonance circuit 19d3 to the fifth resonance circuit 19g3 amplify a signal in the first type predetermined frequency band including the first type resonance frequency f12-f15 and The second type predetermined frequency band FB32 to the fifth first type predetermined frequency band FB35 are provided with the resonance circuits for other devices. Including the specific communication frequency f2-f5 related to the second to fifth communication ICs 19d2 to 19g2 provided in the second transmission / reception circuit 19d to the fifth transmission / reception circuit 19g, and the second desired frequency band FB22 to fifth. It is set to match the desired frequency band FB25.
According to this, the signals of the second desired frequency band FB22 to the fifth desired frequency band FB25 corresponding to the specific communication frequency f2-f5 of the second to fifth communication ICs 19d2 to 19g2 are obtained with a relatively simple circuit configuration. It can be received reliably.

Further, another embodiment will be described with reference to FIGS. This embodiment differs from the above-described embodiment in that the resonance circuit for other devices is configured to include a series resonance circuit. Only differences from the above-described embodiment will be described, and description of the same points will be omitted.
Only the second resonance circuit 119d3 will be described, and the other resonance circuits have the same configuration as the second resonance circuit 119d3, and the description thereof will be omitted.

  The second resonance circuit 119d3 is provided between the connection terminal 19a (diode bridge circuit 19h) and the second BPF 19d1 (filter device for other devices), and is narrower than the second pass frequency band FB12 from the signal input from the connection terminal 19a. In addition, a signal of the second desired frequency band FB22 that is a desired frequency band corresponding to the second specific communication frequency f2 (specific communication frequency) of the second PLC signal (other device specific communication signal) is extracted and output to the second BPF 19d1. (Resonant circuit for other device; see FIG. 8).

  The second resonance circuit 119d3 includes one or more series-type resonance circuits that attenuate signals in the second type predetermined frequency band including the second type resonance frequency and amplify signals outside the second type predetermined frequency band. ing. In the present embodiment, the second resonance circuit 119d3 includes two series resonance circuits 119d3a and 119d3b. Note that the second resonance circuit 119d3 may include only one series resonance circuit.

  The second type predetermined frequency band of the series type resonant circuit 119d3a is the 2-1 second type predetermined frequency band FB132, and the second type predetermined frequency band of the series type resonant circuit 119d3b is the 2-2 second type frequency band. Type predetermined frequency band FB232.

  As shown in FIG. 7, the series resonance circuit 119d3a has a configuration in which, for example, a resistor R11, a capacitor C11, and a coil L11 are connected in series to a signal source. That is, the resistor R11, the capacitor C11, and the coil L11 are provided in parallel with the signal line LN1. Based on the resistance value of the resistor R11, the capacitance of the capacitor C11, and the inductance of the coil L11, the 2-1 second-type resonance frequency f112 and the 2-1 second-type predetermined frequency, which are the resonance frequencies of the series-type resonance circuit 119d3a, are determined. The frequency band FB132 can be defined.

  For example, the series resonance circuit 119d3b has a configuration in which a resistor R11, a capacitor C11, and a coil L11 are connected in series to a signal source. That is, the resistor R11, the capacitor C11, and the coil L11 are provided in parallel with the signal line LN1. From the resistance value of the resistor R11, the capacitance of the capacitor C11, and the inductance of the coil L11, the 2-2 second-type resonance frequency f212 and the 2-2 second-type predetermined frequency which are the resonance frequencies of the series-type resonance circuit 119d3b are determined. A frequency band FB232 can be defined.

  The 2-1 second type predetermined frequency band FB132 (second type predetermined frequency band) is a second transmission / reception circuit 19d (for other devices) in which a second resonance circuit 119d3 (resonance circuit for other devices) is disposed. Does not include the specific communication frequency f2 (specific communication frequency) related to the second communication IC 19d2 (communication IC for other devices) provided in the transmission / reception circuit), and the second desired frequency band FB22 (desired frequency) Frequency band) (see FIG. 8).

  The second-second second-type predetermined frequency band FB232 (second-type predetermined frequency band) is a second transmission / reception circuit 19d (for other apparatus) in which a second resonance circuit 119d3 (resonance circuit for other apparatus) is disposed. Does not include the specific communication frequency f2 (specific communication frequency) related to the second communication IC 19d2 (communication IC for other devices) provided in the transmission / reception circuit), and the second desired frequency band FB22 (desired frequency) Frequency band). The 2-2 second type predetermined frequency band FB232 is set to a frequency band different from the 2-1 second type predetermined frequency band FB132 (see FIG. 8).

  As described above, the second desired frequency band FB22 is formed by the 2-1 second type predetermined frequency band FB132 and the 2-2 second type predetermined frequency band FB232. A frequency band that can be passed is set by a combination of the 2-1 second type predetermined frequency band FB132, the 2-2 second type predetermined frequency band FB232, and the second pass frequency band FB12 of the second BPF 19d1. It may be. For example, both ends of the pass frequency band FB12 may be covered with a 2-1 second type predetermined frequency band FB132 and a 2-2 second type predetermined frequency band FB232.

According to the above-described configuration, the second resonance circuit 119d3 (resonance circuit for another device) attenuates the signals of the second type predetermined frequency bands FB132 and FB232 including the second type resonance frequencies f112 and f212, respectively, and the second type. The series type resonance circuits 119d3a and 119d3b for amplifying signals other than the predetermined frequency bands FB132 and FB232 are included, and the second type predetermined frequency bands FB132 and FB232 include the second resonance circuit 119d3 (the resonance circuit for the other device). ) For a specific communication frequency f2 (specific communication frequency) related to the second communication IC 19d2 (communication IC for other device) provided in the second transmission / reception circuit 19d (transmission circuit for other device). It is not included and is set to be adjacent to the second desired frequency band FB22 (desired frequency band).
According to this, with the relatively simple circuit configuration, the second desired frequency band FB22 (desired frequency) corresponding to the specific communication frequency f2 (specific communication frequency) of the second communication IC 19d2 (communication IC for other devices). Only the signal in the band) is transmitted and input to the second communication IC 19d2, and as a result, it can be received reliably.

  In the above-described embodiment, the resonance circuits for other devices are provided in all of the plurality of transmission / reception circuits for other devices. However, the resonance circuits for other devices are provided in at least one of the plurality of transmission / reception circuits for other devices. You may make it provide.

Although the fuel cell 11a1 in the above-described embodiment is a solid oxide fuel cell, the present invention may be applied to a polymer electrolyte fuel cell.
In the embodiment described above, the power generator 11a includes an engine power generator instead of a fuel cell power generator that generates power using a fuel such as natural gas, LPG, kerosene, gasoline, or methanol.
Moreover, in embodiment mentioned above, although the hot water supply system 40 was employ | adopted as another apparatus which can mutually cooperate with the cogeneration apparatus 10, and can communicate with each other, it is not limited to the hot water supply system 40.
Moreover, although the connection part mentioned above was a connection terminal, it is not restricted to this, A connection connector may be sufficient.

  DESCRIPTION OF SYMBOLS 10 ... Cogeneration apparatus, 11 ... Electric power generation apparatus, 19 ... 1st control apparatus (control apparatus), 19a ... Connection terminal, 19b ... Microcomputer, 19d-19g ... 2nd transmission / reception circuit-5th transmission / reception circuit (For several other apparatuses) (Transmission / reception circuit), 19d2-19g2 ... 2nd-5th communication IC (communication IC for other devices), 19d1-19g1 ... 2nd BPF-5th BPF (filter circuit for other devices), 19d3-19g3 ... 2nd resonance circuit-2nd 5 resonance circuit (resonance circuit for other device), 30 ... system power supply, 40, 140 ... hot water supply system (other device), 45 ... remote control for hot water heater (operation device for other device), 52, 53 ... communication path, f2- f5 ... specific communication frequency, f12-f15 ... first type resonance frequency, FB12-FB15 ... second to fifth pass frequency bands, FB22-FB25 ... second desired frequency band-fifth place Frequency band (the desired frequency band), FB32-FB35 ... second first type predetermined frequency band - 5 first mold a predetermined frequency band.

Claims (3)

The power generation device is connected to a system power supply, collects exhaust heat generated by the power generation of the power generation device, and is a cogeneration device that can communicate with other devices that can cooperate with each other,
The control device for controlling the cogeneration device is:
A communication path connected to the other device or / and the other device operating device for operating the other device, between the other device or / and the other device operating device, A connection terminal to which a communication path for communicating a plurality of other device-specific communication signals having a specific communication frequency is connectable;
A microcomputer for overall control of the cogeneration device;
A plurality of other device-specific communication signals provided between the connection terminal and the microcomputer corresponding to each of the other types of devices, and used for each of the other devices and having different communication frequencies. A plurality of other device transmission / reception circuits that respectively transmit and receive
With
Each of the transmission / reception circuits for other devices includes a communication IC for other devices capable of transmitting / receiving the other device specific communication signal, and a filter circuit for other device having a pass frequency band through which the other device specific communication signal can pass , Each with
At least one of the plurality of other device transmission / reception circuits is provided between the connection terminal and the other device filter circuit, and is narrower than the pass frequency band from the signal input from the connection terminal and A cogeneration apparatus comprising a resonance circuit for another device that extracts a signal in a desired frequency band corresponding to the specific communication frequency of the other device specific communication signal and outputs the signal to the filter circuit for the other device. The resonance circuit for other devices includes a parallel resonance circuit that amplifies a signal in a first type predetermined frequency band including a first type resonance frequency and attenuates a signal outside the first type predetermined frequency band. And
The first-type predetermined frequency band includes the specific communication frequency related to the other device communication IC provided in the other device transmission / reception circuit in which the other device resonance circuit is disposed, and 2. The cogeneration apparatus according to claim 1, wherein the cogeneration apparatus is set to match the desired frequency band. The resonance circuit for the other device includes a series resonance circuit that attenuates a signal in a second type predetermined frequency band including a second type resonance frequency and amplifies a signal outside the second type predetermined frequency band. And
The second-type predetermined frequency band includes the specific communication frequency related to the communication IC for other device provided in the transmission / reception circuit for other device in which the resonance circuit for other device is disposed. The cogeneration apparatus according to claim 1, wherein the cogeneration apparatus is set to be adjacent to the desired frequency band.

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