JP5453925B2 - Cogeneration system - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a cogeneration system that is excellent in convenience and capable of supplying hot water suitable for drinking in a cogeneration system intended to use waste heat of a solar water heater, gas power generation, fuel cell, etc. for hot water supply. Is.

  Some conventional hot water storage cogeneration systems are described below (see, for example, Patent Document 1).

  FIG. 2 shows a conventional cogeneration system described in Patent Document 1. As shown in FIG. 2, in the cogeneration system, a heating system H for heating hot water stored in the storage tank 10, a hot water supply system M for discharging hot water for hot water supply, and low-temperature hot water from the outside. A water supply system C for supply is provided. In the middle of the hot water supply system M, a hot water supply side three-way valve 32 capable of shutting off the heating system H and the hot water supply system M is provided. In the cogeneration system, the hot water staying in the storage tank 10 by the fuel cell 5 provided in the heating system H in a state where the hot water supply side three-way valve 32 is operated to shut off the heating system H and the hot water system M. Reheating and hot water supply using hot water heated by the hot water supply device 31 provided in the hot water supply system M can be performed independently.

JP 2006-349248 A

  However, in the conventional configuration, reheating of hot water staying in the storage tank 10 by the fuel cell 5 and hot water using hot water heated by the hot water supply device 31 provided in the hot water supply system M are performed independently. However, the purpose of the switching is only to prevent the liquid in the storage means from being discharged in a state where it is not sufficiently sterilized, and the hot water discharged from the cogeneration system cannot be drunk as it is. Had no problem.

  In order to solve the conventional problem, the cogeneration system of the present invention includes a drinking selection means that is operated when a user wants to drink hot water from the hot water supply path, and the hot water control means includes the drinking selection means. When operated, the switching means is switched to send the water in the water supply pipe through the bypass pipe without sending the hot water in the hot water storage tank to the instantaneous water heater, and the instantaneous water heater is heated. It is something to be made.

  According to the cogeneration system of the present invention, there is provided a cogeneration system that can supply potable hot water that is obtained by heating fresh water supply without using water that is not suitable for drinking in a hot water storage tank at the intention of the user. Can be provided.

The block diagram which shows the cogeneration system in embodiment of this invention Configuration diagram showing a conventional cogeneration system

  1st invention provides the cogeneration system which can supply the hot water which can be drunk which heated fresh water supply without using the unsuitable drinking water in a hot water storage tank by a user's intention. Can do.

  The second invention is provided with notifying means for notifying the user of switching of the hot water supply circuit by sound or voice, particularly when the drinking selection means is operated in the first invention, and the user switches to the drinking state. It can be clearly informed that it is in a state.

  The third invention is provided with a notification means for notifying the user of switching of the hot water supply circuit by light or display, particularly when the drinking selection means is operated in the first invention, and the user switches to the drinking state. It can be clearly informed that it is in a state.

  In particular, in the second or third invention, the fourth invention is a notification means for notifying the user of switching of the hot water supply circuit by sound or voice or a light or display of the hot water supply circuit for the user in the vicinity of the drinking selection means. It is possible to clearly notify the user that the user has been switched to the drinking state by providing notification means for notifying the switching.

  In particular, in the second or third invention, the fifth invention is a notification means for notifying the user of switching of the hot water supply circuit by sound or sound near the hot water outlet of the hot water supply path, or light or display to the user. It is possible to clearly notify that the user is in a state of switching to the drinking state by providing notification means for notifying the switching of the hot water supply circuit.

  The sixth invention, in particular, in any one of the second to fifth inventions, comprises a determination means for determining whether or not the hot water coming out of the hot water supply path is in a state suitable for drinking using a timer, an integrated flow rate or the like. If the determination means determines that the hot water coming out of the hot water supply path is in a state suitable for drinking, it can be notified by the notification means.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited by this Embodiment.

(Embodiment 1)
1 is a configuration diagram of a cogeneration system using a gas hot water supply apparatus according to Embodiment 1 of the present invention.

  The basic configuration includes a gas hot water supply device A as a backup heat source device, a hot water storage unit B having a hot water storage tank 9 and a hot water control unit, and a power generation unit C.

  In an actual cogeneration system, a system capable of three patterns of hot water supply operation, bath operation, and heating operation is configured. In this configuration diagram, the hot water supply operation function is representatively shown.

  When the hot water tap 6 is opened, water supplied from the water supply port 8 is guided to the hot water storage tank 9 through the water supply pipe L1. Further, the water supply is led to the gas hot water supply device A from the water supply pipe L2. The water that has passed through the gas hot water supply device A is supplied from the hot water tap 6 through the water supply line L3, the water amount control valve 13, and the water supply line L4.

  On the other hand, the other water supply from the water supply port 8 passes through the water supply pipe L5, passes through the bypass valve 14, is mixed with the water supply pipe L3, and is supplied from the hot water tap 6 through the water supply pipe L4.

  Here, when the hot water temperature in the hot water storage tank 9 is sufficiently higher than the hot water temperature set by the remote controller 12, the hot water from the hot water storage tank 9 led to the water amount control valve 13 and the feed water led to the bypass valve 14 are mixed. To the prescribed warm water. This hot water is guided from the water supply line L2 to the hot water tap 3 through the water supply line L3 through the hot water supply heat exchanger 32 of the gas hot water supply apparatus A. At this time, the burner 31 of the gas hot water supply apparatus A does not burn.

  Next, when the hot water temperature in the hot water storage tank 9 is lower than the hot water temperature set by the remote controller 12, the hot water temperature in the hot water storage tank 9 is sufficiently higher than the hot water temperature set by the remote controller 12 from the water supply line L2. It is led to the gas hot water supply device A. At this time, if the flow rate detected by the water amount sensor 44 is equal to or greater than the ignition water amount, the combustion fan 35 rotates and the burner 31 is combusted by gas supplied from a gas source valve and a gas proportional valve (not shown). Water that is lower than the set temperature led to the gas water heater A is heated by the heat exchanger 32, reaches a predetermined hot water temperature, is discharged from the gas water heater A through the pipe L3, and is fed from the water supply line L3 to the water amount control valve 13, It is led to the hot-water tap 3 through the water supply line L4. At this time, the bypass valve 14 is closed.

  Next, when the hot water drinking mode is selected by the changeover switch of the remote controller 12, the hot water storage tank closing valve 40 is closed and the water supply closing valve 41 is opened. When the hot water tap 6 is opened in this state, the water supplied from the water supply port 8 does not pass through the hot water storage tank 9, passes through the water supply line L 6, the water supply shut-off valve 41, passes through the water supply line L 2, and is supplied with gas hot water. At this time, the temperature of the hot water supply is guided to the apparatus A. Since the hot water temperature is lower than the hot water temperature set by the remote controller 12, the stored water in the hot water storage tank 9 is guided to the gas hot water supply apparatus A from the water supply line L2. At this time, if the flow rate detected by the water amount sensor 44 is equal to or greater than the ignition water amount, the combustion fan 35 rotates and the burner 31 is combusted by gas supplied from a gas source valve and a gas proportional valve (not shown). Water that is lower than the set temperature led to the gas water heater A is heated by the heat exchanger 32, reaches a predetermined hot water temperature, is discharged from the gas water heater A through the pipe L3, and is fed from the water supply line L3 to the water amount control valve 13, It is led to the hot-water tap 3 through the water supply line L4. At this time, the bypass valve 14 is closed.

(Embodiment 2)
Next, an embodiment of notification means for notifying the user of switching of the hot water supply circuit by sound or voice when the drinking selection means is operated will be described with reference to FIG.

  When the hot water drinking mode is selected by the changeover switch installed on the remote controller 12, the control device 11 of the hot water storage unit B receives the signal. The hot water storage tank closing valve 40 is closed by this hot water drinking mode signal, and the water supply closing valve 41 is opened. When the controller 11 confirms that the hot water drinking mode has been switched to, the user is notified from the speaker 5 that the hot water drinking mode is set by a buzzer sound or voice output.

(Embodiment 3)
Next, a description will be given of an embodiment of notification means for notifying the user of switching of the hot water supply circuit by light or display when the drinking selection means is operated.

  When the hot water drinking mode is selected by the changeover switch installed on the remote controller 12, the control device 11 of the hot water storage unit B receives the signal. The hot water storage tank closing valve 40 is closed by this hot water drinking mode signal, and the water supply closing valve 41 is opened. When the control device 11 confirms that the hot water drinking mode has been switched, the fluorescent lamp 80 is turned on or blinked. In addition, the fact that it is possible to drink is displayed on the electric light display unit 85 to notify the user.

(Embodiment 4)
Next, when the drinking selection means is operated, a notification means for notifying the user of switching of the hot water supply circuit by a sound or sound provided near the drinking selection means, or a light or display of the hot water supply circuit to the user. An embodiment of an informing means for informing the switching will be described with reference to FIG.

  When the hot water drinking mode is selected by the changeover switch installed on the remote controller 12, the control device 11 of the hot water storage unit B receives the signal. The hot water storage tank closing valve 40 is closed by this hot water drinking mode signal, and the water supply closing valve 41 is opened. When it is confirmed that the control device 11 has switched to the hot water drinking mode, a switch completion signal is transmitted to the remote controller 12. When the remote control 12 receives this switching completion signal, the user is notified of the hot water drinking mode from the speaker 12B attached on the remote control 12 by a buzzer sound or sound output.

  Similarly, when the remote control 12 receives the replacement completion signal, the fluorescent lamp 16 installed in the remote control 12 is turned on and blinking. Alternatively, the user is notified of the hot water drinking mode by displaying a notification document on the display unit 18 of the remote controller 12.

(Embodiment 5)
Next, when the drinking selection means is operated, a notification means for notifying the user of switching of the hot water supply circuit by a sound or sound provided near the hot water outlet of the hot water supply path, or a user by light or display An embodiment of an informing means for informing the switching of the hot water supply circuit will be described with reference to FIG.

  When the hot water drinking mode is selected by the changeover switch installed on the remote controller 12, the control device 11 of the hot water storage unit B receives the signal. The hot water storage tank closing valve 40 is closed by this hot water drinking mode signal, and the water supply closing valve 41 is opened. When the control device 11 confirms that the hot water drinking mode has been switched to, the speaker 5B installed in the vicinity of the hot water tap 6 notifies the user that the mode is the hot water drinking mode by buzzer sound or voice output.

  Similarly, when the control device 11 confirms that the hot water drinking mode has been switched to, the fluorescent lamp 80b installed in the vicinity of the hot water tap 6 is turned on and blinked. Alternatively, the user is notified that the hot water drinking mode is set by displaying a notification document on the electric display 85b of the remote controller 12.

(Embodiment 6)
Next, when the drinking selection means is operated with reference to FIG. 1, a method for determining whether or not the sewage that is not suitable for drinking in the water supply circuit has been completely discharged and notifying the user of this will be described. .

  When the hot water tap 6 is opened, water supplied from the water supply port 8 is guided to the hot water storage tank 9 through the water supply pipe L1. Further, the water supply is led to the gas hot water supply device A from the water supply pipe L2. The water that has passed through the gas hot water supply device A is supplied from the hot water tap 6 through the water supply line L3, the water amount control valve 13, and the water supply line L4.

In the case of the first embodiment, when the hot water drinking mode is selected by the changeover switch of the remote controller 12, the hot water tank closing valve 40 is closed and the water supply closing valve 41 is opened. When the hot water tap 6 is opened in this state, the water supplied from the water supply port 8 does not pass through the hot water storage tank 9, passes through the water supply line L 6, the water supply shut-off valve 41, passes through the water supply line L 2, and is supplied with gas hot water. At this time, the water supply temperature is led to the apparatus A. Since the hot water temperature is lower than the hot water temperature set by the remote controller 12, the water stored in the hot water storage tank 9 is guided to the gas hot water supply apparatus A from the water supply pipe L2. At this time, if the flow rate detected by the water amount sensor 44 is equal to or greater than the ignition water amount, the combustion fan 35 rotates and the burner 31 is combusted by gas supplied from a gas source valve and a gas proportional valve (not shown). Water that is lower than the set temperature led to the gas water heater A is heated by the heat exchanger 32, reaches a predetermined hot water temperature, is discharged from the gas water heater A through the pipe L3, and is fed from the water supply line L3 to the water amount control valve 13, It is led to the hot-water tap 3 through the water supply line L4. At this time, the bypass valve 14 is closed.

  When the hot-water tap 6 is opened, the control device 11 of the hot water storage unit B notifies the user of the hot water drinking mode from the speaker 5 through a buzzer sound or voice output after a preset delay time has elapsed.

  At this time, the preset delay time is set in a timely manner so that sewage unsuitable for drinking in the water supply circuit can be completely discharged.

  Next, using the integrated flow rate of the water sensor. A method for determining whether or not the sewage that is not suitable for drinking in the water supply circuit has been completely discharged and notifying the user of this will be described.

  When the hot water tap 6 is opened, the water amount sensor 10 starts counting the amount of water. The controller 11 of the hot water storage unit B notifies the user that the hot water drinking mode is selected from the speaker 5 through a buzzer sound or sound output when the preset accumulated water amount is reached.

  At this time, the preset delay time is set in a timely manner so that sewage unsuitable for drinking in the water supply circuit can be completely discharged.

  As for the method for notifying the user, even if the methods of the third embodiment, the fourth embodiment, and the fifth embodiment are used, a greater effect can be obtained.

  According to the cogeneration system of the present invention, it is possible to provide a hot water supply device that can supply sanitary hot drinking water safely by intentional human operation.

A Gas hot water supply device B Hot water storage unit C Power generation unit 5 Speaker 6 Hot water tap 9 Hot water storage tank 12 Remote control 13 Water volume control valve 14 Bypass valve 40 Hot water storage tank shut-off valve 41 Water feed shut-off valve 44 Water quantity sensor 80 Fluorescent lamp 85 Lightning display

Claims (6)

A hot water storage tank, a heat recovery unit that heats the water in the lower portion of the hot water storage tank using exhaust heat during power generation and returns the water to the hot water storage tank, a water supply pipe for supplying water to the hot water storage tank, and an upper portion of the hot water storage tank A hot water supply path for using hot water for hot water supply, an instantaneous water heater provided in the middle of the hot water supply path, one end connected to the middle of the water supply pipe, and the other end of the hot water storage tank and the instantaneous water heater A bypass pipe connected to the hot water supply path between, and switching means for switching whether to send hot water in the hot water storage tank to the instantaneous hot water supply machine or to send the water in the water supply pipe through the bypass pipe, a hot water supply control means for controlling the instantaneous water heater and the switching means comprises a drinking selecting means operated by a user when it is desired to drinking water exiting from the hot water supply path, said hot water supply control means, said drinking selecting means When operated, before Cogeneration system for heating operation to the instantaneous water heater with switching the switching means to send the water of the water supply pipe through the instantaneous water heater the bypass pipe without sending the hot water storage tank upper part of the hot water. The cogeneration system according to claim 1, further comprising a notifying means for notifying a user of switching of a hot water supply circuit by sound or voice when the drinking selection means is operated. The cogeneration system according to claim 1, further comprising a notifying means for notifying a user of switching of a hot water supply circuit by light or display when the drinking selection means is operated. The cogeneration system according to claim 2 or 3, wherein the notification means is provided in the vicinity of the drinking selection means. The cogeneration system according to claim 2 or 3, wherein the notification means is provided near a hot water outlet of the hot water supply path. After the drinking selection means is operated, it comprises determination means for determining whether or not the hot water coming out of the hot water supply path is in a state suitable for drinking, and the hot water coming out of the hot water supply path is suitable for drinking The cogeneration system according to any one of claims 2 to 5, wherein when the state is determined to be in the state, the notification unit notifies the fact.