WO2016171076A1

WO2016171076A1 - Emergency power supply device for pellet stove, and pellet stove incorporating emergency power supply device

Info

Publication number: WO2016171076A1
Application number: PCT/JP2016/062094
Authority: WO
Inventors: 北條政弘
Original assignee: 有限会社奥美濃プロデュース
Priority date: 2015-04-22
Filing date: 2016-04-15
Publication date: 2016-10-27
Also published as: CN107532798A; JP2016205707A; JP6511658B2

Abstract

[Problem] To provide: an emergency power supply device that is for pellet stoves and that enables safe fire extinction and continuous operation even during a power failure; and a pellet stove incorporating the emergency power supply device. [Solution] An emergency power supply device has: an interruption detection circuit 14 that detects interruption of a commercial power supply; and a delay changeover control unit 15 that outputs, to a changeover switch unit 13, a changeover signal that causes a changeover to a first supply line 16 so as to halt power supply to the pellet stove only for a certain period of time, after the elapse of a predetermined period of time from when the interruption detection circuit 14 detects interruption of the commercial power supply. An amount of stored power remaining in a storage battery 11 after the elapse of the predetermined period of time enables at least the completion of combustion of wood pellets in a combustion chamber.

Description

Pellet stove emergency power supply and pellet stove incorporating the same

The present invention relates to an emergency power supply device used for a pellet stove using wood pellets as fuel, and a pellet stove incorporating this emergency power supply device.

In recent years, pellet stoves that use wood pellets as fuel are attracting attention as earth-friendly heating appliances that use renewable energy. The pellet stove includes a combustion chamber for burning the wood pellets supplied from the fuel tank, and an exhaust fan for exhausting combustion gas from the combustion chamber to the outside through an exhaust pipe. Generally, in a pellet stove, when a power plug is inserted into an outlet for supplying commercial power, first, temperatures in the combustion chamber and the fuel tank are checked. When these temperatures are abnormally high, only the exhaust fan is driven to lower the temperatures in the combustion chamber and the fuel tank.

This operation will be described in detail using a power outage as an example. If a power failure occurs during operation of the pellet stove, the power supply is cut off and the exhaust fan also stops. However, the wood pellets remaining in the combustion chamber continue to burn, and the temperature in the combustion chamber remains high. When the power source is restored during combustion of the wood pellets remaining in the combustion chamber, first, the temperatures in the combustion chamber and the fuel tank are checked. At this time, since the temperature in the combustion chamber is high, only the exhaust fan is driven. Thereby, the combustion of the wood pellets remaining in the combustion chamber can be safely terminated. An example of such a pellet stove is shown in Patent Document 1.

However, if a power failure occurs during operation of the pellet stove, the exhaust fan stops despite the burning of the wood pellets in the combustion chamber, resulting in insufficient oxygen in the combustion chamber. Therefore, after the power failure, if the front door of the combustion chamber is opened before the power is restored, there is a risk of causing a back draft, which is very dangerous. In addition, carbon monoxide may leak into the room due to incomplete combustion.

In order to prevent this, for example, it is conceivable to use an emergency power supply as shown in Patent Document 2. If this emergency power supply is used, it is possible to switch from commercial power to emergency power in the event of a power failure, so the pellet stove can continue to operate even during a power failure, and the exhaust fan will also be stopped. There is no.

JP 2011-191040 A JP 2013-9463 A

However, even in the case of using the above-described conventional emergency power supply device, there is an inconvenience when the amount of stored electricity disappears due to the operation of the pellet stove by the emergency power supply device after the power failure, and the power cannot be supplied. . That is, in this case, the exhaust fan stops despite the burning of the wood pellets in the combustion chamber, and the same problem as the conventional pellet stove remains.

The present invention has been made in view of such conventional problems, and is an emergency power supply device for a pellet stove that can be continuously operated even during a power failure and can be safely extinguished, and incorporates the same. Is to provide a pellet stove.

In order to solve the above-mentioned problems, the emergency power supply device for a pellet stove according to claim 1 is characterized in that when the wood pellets in the combustion chamber are in combustion when the power is turned on, the new wood pellets are not supplied. A first supply path that is used for a pellet stove that drives an exhaust fan until combustion of the wood pellets in the combustion chamber is completed, and that is supplied with electric power from a commercial power source; and a second that is supplied with electric power from a storage battery. A switching switch unit that switches the supply path to supply power to the pellet stove is provided, and when power is supplied from a commercial power source, the storage battery stores power and is first supplied by the switching switch unit. When the commercial power supply is cut off, the emergency power supply device of the pellet stove is switched to the second supply path by the changeover switch section. And a power supply to the pellet stove by switching to the first supply path after a predetermined time has elapsed since the power supply detection circuit detected the power supply interruption. A delay switching control unit that outputs a switching signal to the switch unit for stopping for a predetermined time, and at least the amount of the wood pellet in the combustion chamber is determined by the amount of power remaining in the storage battery after the predetermined time has elapsed. The combustion can be terminated.

The feature of the emergency power supply device of the pellet stove according to claim 2 is that the predetermined time is a time during which 40% to 80% of the total charged amount of the storage battery is consumed.

A feature of the emergency power supply device for a pellet stove according to claim 3 is that it has notification means for notifying that the storage battery has a small amount of electricity at the same time as the switching signal is output.

A feature of the emergency power supply device for a pellet stove according to claim 4 is that the notification means is an LED.

A feature of the pellet stove according to claim 5 is that the emergency power supply device for pellet stove according to any one of claims 1 to 4 is housed and incorporated in a housing.

The feature of the pellet stove according to claim 6 is that the emergency power supply device for the pellet stove can be pulled out of the housing by a slide rail.

In the emergency power supply device for a pellet stove according to claim 1, when the commercial power supply is cut off, the selector switch unit switches to the second supply path to supply power from the storage battery to the pellet stove. Therefore, the pellet stove can be continuously operated even during a power failure.

Further, the delay switching control unit outputs a switching signal to the changeover switch unit after a predetermined time has elapsed after the interruption detection circuit detects the interruption of the commercial power supply. The predetermined time is a time during which at least the combustion of the wood pellets in the combustion chamber can be completed by the amount of power stored in the storage battery after the predetermined time has elapsed. When the switching signal is output to the changeover switch unit, the commercial power supply is switched to the first supply path that is in a power failure, and thus the supply of power to the pellet stove is stopped. Then, after switching to the second supply path again after a certain time has elapsed, the pellet stove is turned on, and the pellet stove performs normal power-on operation.

That is, first, the temperature in the combustion chamber is checked. Since the temperature in the combustion chamber is high, only the exhaust fan is driven without supplying new wood pellets. At this time, the storage battery has an amount of stored electricity that can at least complete the combustion of the wood pellets in the combustion chamber. Thereby, the wood pellets remaining in the combustion chamber can be completely burned. Therefore, according to the emergency power supply device of the pellet stove, it can be continuously operated even during a power failure and can be extinguished safely.

In the emergency power supply device for a pellet stove according to claim 2, at least the predetermined time remaining for ending the combustion of the wood pellets in the combustion chamber is from 40% to 80% of the total storage amount of the storage battery. The amount of time that is consumed. For this reason, even if it is a case where a storage battery raise | generates aged deterioration, the time which can extinguish a pellet stove safely can be ensured reliably.

In the emergency power supply device for the pellet stove according to claim 3, since the switching signal is output, and at the same time, there is a notification means for notifying that the storage amount of the storage battery is small, so the cause of the stoppage of the pellet stove is known. Convenient for the user of the pellet stove.

In the emergency power supply device for a pellet stove according to claim 4, since the notification means is an LED, it consumes less power and is inexpensive.

In the pellet stove according to claim 5, since the emergency power supply device of the pellet stove according to any one of claims 1 to 4 is housed and incorporated in the housing, the installation place of the emergency power supply device is separately provided. There is no need to secure it, which can contribute to space saving.

In the pellet stove according to claim 6, since the emergency power supply device for the pellet stove can be pulled out of the housing by the slide rail, it is convenient for maintenance.

The schematic of the pellet stove using the emergency power supply device of Embodiment 1. FIG. The schematic of a pellet stove in connection with the pellet stove using the emergency power supply device of Embodiment 1. FIG. FIG. 3 is a block diagram showing an electrical configuration of the emergency power supply device according to the first and second embodiments. The flowchart which shows the operation | movement of a pellet stove in connection with the pellet stove using the emergency power supply device of

Embodiment

1,2. The flowchart which shows operation | movement of an emergency power supply device in connection with the pellet stove using the emergency power supply device of

Embodiment

1,2. The schematic of the pellet stove incorporating the emergency power supply device of Embodiment 2. FIG.

Embodiments 1 and 2 embodying an emergency power supply device for a pellet stove according to the present invention and a pellet stove incorporating the pellet stove will be described below with reference to the drawings. First, an emergency power supply device for a pellet stove according to the first embodiment will be described. FIG. 1 is a schematic view of the pellet stove emergency power supply device 1 disposed between a pellet stove 70 and an outlet 92. The pellet stove 70 warms the chamber 90 by burning the wood pellets P supplied from the fuel tank 80 in the combustion chamber 71. The outlet 92 is provided on the wall surface 91 of the room 90 and supplies a household AC 100 V power source, which is a commercial power source.

Further, the emergency power supply device 1 has a casing whose outer shape is a rectangular parallelepiped. And LED2 as a notification means is attached to the surface panel of the housing | casing. The LED 2 blinks when the pellet stove 70 is stopped during operation by the emergency power supply device 1. In FIG. 1, for convenience, the emergency power supply device 1 is placed on the floor behind the pellet stove 70, but the emergency power supply device 1 is placed on the left side or right side of the pellet stove 70. Is normal.

As shown in FIG. 2, the outer shape of the pellet stove 70 has a substantially rectangular parallelepiped shape, a combustion chamber 71 is formed on the chamber 90 side (left side of the drawing), and wood pellets P are placed in the lower portion of the combustion chamber 71 for combustion. A combustion pot 72 is provided. An ash receiver 73 is provided below the combustion pot 72 to store ash falling from the combustion pot 72. A front door 74 that can be opened and closed is provided on the front surface of the pellet stove 70. The front door 74 is opened so that the ash in the ash receiver 73 can be cleaned. An exhaust pipe 75 and a blower pipe 76 are disposed on the outdoor side (right side of the drawing) of the combustion chamber 71. The exhaust pipe 75 guides the high-temperature combustion gas generated in the combustion chamber 71 to the outside, and the blower pipe 76 heats the air in the room 90 with the combustion gas in the exhaust pipe 75 to warm it. This warm air is guided into the room 90.

A fuel tank 80 is formed at the upper part on the outdoor side (right side of the drawing) of the pellet stove 70, and a fuel supply auger 81 is provided at the lower part of the fuel tank 80. Wood pellets P are stored in the fuel tank 80, and the wood pellets P are sent from a fuel supply port 77 to a combustion pot 72 in a combustion chamber 71 by a fuel supply auger 81. In addition, an exhaust fan 82, a blower fan 83, a lead-out pipe 84, and an introduction pipe 85 are provided below the fuel tank 80. Combustion gas in the exhaust pipe 75 is forcibly discharged from the outlet pipe 84 to the outside by the exhaust fan 82, and warm air in the blow pipe 76 is sent into the room 90 by the blow fan 83.

The outlet pipe 84 and the introduction pipe 85 are arranged concentrically, and the introduction pipe 85 is connected to the combustion pot 72 and the combustion chamber 71. Therefore, when the combustion gas in the exhaust pipe 75 is discharged outdoors by the exhaust fan 82, outdoor air is sucked from the introduction pipe 85 and guided to the combustion pot 72. Further, a fuel tank heat sensor 86 for detecting the temperature in the fuel tank 80 is attached to the outer wall portion of the fuel tank 80, and an exhaust heat sensor 87 for detecting the temperature of the combustion gas is attached to the outer wall of the exhaust pipe 75. Has been. For convenience, the temperature detected by the exhaust heat sensor 87 is treated as the temperature in the combustion chamber 71.

As shown in FIG. 3, the emergency power supply device 1 includes a rectifier 10, a storage battery 11, an inverter 12, a changeover switch unit 13, a cutoff detection circuit 14, a delay switching control unit 15, and an LED 2 as electrical components. . The AC power supplied from the input terminal 18 is stepped down by the rectifier 10 and converted into DC, and the converted DC power is stored in the storage battery 11. Further, the DC power supplied from the storage battery 11 is converted into AC by the inverter 12 and boosted. The changeover switch unit 13 switches between a first supply path 16 in which power from a commercial power source is directly supplied from the input terminal 18 and a second supply path 17 in which power from the storage battery 11 is supplied via the inverter 12. To output terminal 19. Thereby, electric power is supplied to the pellet stove 70. In addition, when electric power is supplied from the commercial power source, electric power is stored in the storage battery 11 and switched to the first supply path 16 by the changeover switch unit 13, and when the commercial power source is cut off, the switching is performed. The switch unit 13 switches to the second supply path 17.

The interruption detection circuit 14 detects the interruption of the commercial power supply and outputs a detection signal to the delay switching control unit 15. In addition, the delay switching control unit 15 outputs the switching signal to the changeover switch unit 13 after reaching a predetermined time after inputting the detection signal. By this switching signal, the supply of power to the pellet stove 70 is stopped for a certain time.

The operation of the emergency power unit 1 and the pellet stove 70 configured as described above will be described with reference to the flowcharts shown in FIGS. First, the operation of the pellet stove 70 will be described. As shown in FIG. 4, when the power source is turned on to the pellet stove 70 (for example, when the power plug is inserted into the outlet 92 or when the power source is restored after a power failure), the combustion chamber 71 and the fuel tank are processed in step S11. 80 temperatures are checked. The temperature of the combustion chamber 71 is detected by the exhaust heat sensor 87, and the temperature of the fuel tank 80 is detected by the fuel tank heat sensor 86. The temperature detected by the exhaust heat sensor 87 is handled as the temperature in the combustion chamber 71. When both the temperatures of the combustion chamber 71 and the fuel tank 80 are normal, the process proceeds to step S15 and waits for the operation switch of the pellet stove 70 to be pressed. In the present specification, “normal temperature” means that the temperature is not high but is not more than a certain temperature. If at least one of the temperatures of the combustion chamber 71 and the fuel tank 80 is high, the process proceeds to step S12.

In step S12, the exhaust fan 82 is driven. Thereby, the combustion gas in the combustion chamber 71 is discharged to the outside through the exhaust pipe 75 and the outlet pipe 84, and the outdoor air is sucked from the introduction pipe 85 and guided to the combustion pot 72 and the combustion chamber 71. Thus, the temperatures of the combustion chamber 71 and the fuel tank 80 are lowered.

And in step S13, it waits until the temperature of both the combustion chamber 71 and the fuel tank 80 becomes normal, and the exhaust fan 82 is stopped in step S14. Then, in step S15, it waits for the operation switch of the pellet stove 70 to be pushed.

When the operation switch of the pellet stove 70 is pressed, an ignition operation is started in step S16. That is, the fuel supply auger 81 is driven, and the wood pellet P for ignition is sent to the combustion pot 72, and the wood pellet P is ignited by the ignition heater. Then, after confirming the rise in the temperature of the combustion chamber 71, the exhaust fan 82 and the blower fan 83 are driven in step S17, and the wood pellet P is appropriately supplied to the combustion pot 72 by the fuel supply auger 81. Stable combustion is maintained (normal operation).

Next, the operation of the emergency power supply device 1 and the operation of the pellet stove 70 associated therewith will be described. As shown in FIG. 5, when a power failure is detected by the shutoff detection circuit 14 in step S1, steps S2 and S3 are executed. In step S2 and step S3, when the power failure is restored within 45 minutes, the process returns to step S1. On the other hand, when the power failure is restored, the pellet stove 70 is turned on. Therefore, step S11 is performed in the pellet stove 70 as described above.

In addition, when 45 minutes or more have passed with a power failure, step S4 is executed. The “45 minutes” is the “predetermined time” in claim 1 and the “time in which 40% to 80% of the charged amount of the storage battery is consumed” in claim 2. In the present embodiment, “the time during which 40% to 80% of the total storage amount of the storage battery is consumed” is 45 minutes, but this time is determined by the total storage amount of the storage battery 11 to be used. It is not necessarily limited to 45 minutes.

In step S4, the delay switching control unit 15 outputs a switching signal to the changeover switch unit 13 for 3 seconds. When step S4 and subsequent steps are executed, the amount of power remaining in the storage battery 11 is reduced, and the pellet stove 70 is extinguished. When the changeover switch unit 13 receives a switching signal, the second supply path 17 is switched to the first supply path 16. At this time, since the commercial power supply is in a power failure, the supply of power to the pellet stove 70 is stopped, and all power sources such as the fuel supply auger 81, the exhaust fan 82, the blower fan 83, and the like are stopped. After 3 seconds, when the switching signal from the delay switching control unit 15 to the switching switch unit 13 is stopped, the switching switch unit 13 switches the first supply path 16 to the second supply path 17 again.

As a result, power is supplied to the pellet stove 70, and the pellet stove 70 is checked for the temperature of the combustion chamber 71 and the fuel tank 80 as described above (step S11). Since the temperature of the combustion chamber 71 is high, only the exhaust fan 82 is driven (step S12). At this time, new wood pellets P are not supplied into the combustion chamber 71, and the storage battery 11 has at least a storage amount sufficient to end the combustion of the wood pellets P in the combustion chamber 71. . Thereby, the wood pellet P remaining in the combustion chamber 71 can be completely burned. Here, “3 seconds” is the “certain time” of claim 1. In the present embodiment, the “certain time” is 3 seconds, but it is not necessarily 3 seconds. However, this “certain time” is preferably 2 to 5 seconds. This is because if it is 2 to 5 seconds, the pellet stove 70 can be surely brought into the power-on state, and the smooth operation of the pellet stove 70 is ensured.

In step S5, LED2 blinks. Thereby, since the storage amount of the storage battery 11 is small, it can be known that the operation of the pellet stove 70 has been stopped. And it waits until a power failure returns in step S6. When the power failure is restored, the LED 2 is turned off in step S7, and the control is returned to step S1. In addition, when the storage amount of the storage battery 11 runs out during a power failure (the emergency power supply device 1 is executing step S6), the operation of both the pellet stove 70 and the emergency power supply device 1 is stopped. Since the remaining wood pellets P are already completely burned, safety is ensured. Further, when the power failure returns during the power failure, the changeover switch unit 13 switches from the second supply path 17 to the first supply path 16, so the pellet stove 70 continuously executes the step being executed without any problem. be able to.

In the emergency power supply device for the pellet stove according to the first embodiment, when the commercial power is cut off, the selector switch unit 13 switches the second supply path 17 to supply power from the storage battery 11 to the pellet stove 70. Is done. Therefore, the pellet stove 70 can be continuously operated even during a power failure.

Also, the delay switching control unit 15 outputs a switching signal to the changeover switch unit 3 seconds after 45 minutes have elapsed since the interruption detection circuit 14 detected the interruption of the commercial power supply. As a result, the pellet stove 70 is turned on, and the pellet stove 70 performs a normal power-on operation. At this time, the storage battery 11 has at least a stored amount of electricity that can end the combustion of the wood pellets P in the combustion chamber 71 at least. Thereby, even if the power failure for a long time occurs while using the pellet stove 70, the wood pellet P remaining in the combustion chamber 71 can be completely burned. Therefore, according to the emergency power supply device of the pellet stove, it can be continuously operated even during a power failure and can be extinguished safely.

In this emergency power supply device for a pellet stove, 45 minutes, which is the time from when the interruption detection circuit 14 detects the interruption of the commercial power supply until the delay switching control unit 15 outputs a switching signal to the changeover switch unit 13. Is a time during which 40% to 80% of the total storage amount of the storage battery 11 is consumed. For this reason, even if it is a case where the storage battery 11 raise | generates aged deterioration, the time which can extinguish the pellet stove 70 safely can be ensured reliably.

Furthermore, the emergency power supply device for the pellet stove has the LED 2 that is a notification means for notifying that the storage battery 11 has a small amount of electricity at the same time as the switching signal is output. The cause can be known, which is convenient for the user of the pellet stove 70. Further, since the LED 2 is used as the notification means, the power consumption is low and the cost is low. Furthermore, in this embodiment, although LED2 is used as a notification means, it is not limited to this, For example, a buzzer etc. can be used.

Next, a pellet stove incorporating the emergency power supply device of Embodiment 2 will be described. As shown in FIG. 6, the pellet stove 20 has substantially the same configuration as the pellet stove 70 in which the emergency power supply device 1 of the first embodiment is used. Therefore, the same reference numerals are used for the same components as the pellet stove 70, and the description thereof is omitted.

The emergency power supply 21 is housed and incorporated in the housing 23 of the pellet stove 20. The emergency power supply 21 can be pulled out from the side surface of the housing 23 by a slide rail 25. The LED 22 is attached to the upper part of the housing 23. The other configuration is the same as that of the emergency power supply device 1 of the first embodiment, and the description thereof is omitted.

In the pellet stove 20 of the second embodiment, it is not necessary to separately secure an installation place of the emergency power supply device 21, and it can contribute to space saving. Further, since the emergency power supply device 21 can be pulled out of the housing 23 by the slide rail 25, it is convenient for maintenance. Other operations and effects are the same as those of the first embodiment.

As mentioned above, although the emergency power supply device of the pellet stove of this invention and the pellet stove incorporating this were demonstrated according to

Embodiment

1, 2, this invention is not restrict | limited to these, The technique of this invention Needless to say, the present invention can be changed and applied as appropriate as long as it does not violate the general idea.

DESCRIPTION OF

SYMBOLS

1,21 ... Emergency power supply device of pellet stove, 2, 22 ... Notification means (LED), 11 ... Storage battery, 13 ... Changeover switch part, 14 ... Cutoff detection circuit, 15 ... Delay switching control part, 16 ... First supply 17, second supply path, 20, 70, pellet stove, 23, housing, 25, slide rail, 71, combustion chamber, 82, exhaust fan, P, wood pellet.

Claims

When the wood pellets in the combustion chamber are burning when the power is turned on, it is used for the pellet stove that drives the exhaust fan until the combustion of the wood pellets in the combustion chamber is completed without supplying new wood pellets,
A changeover switch unit that switches between a first supply path to which power from a commercial power supply is supplied and a second supply path to which power from a storage battery is supplied to supply power to the pellet stove;
When electric power is supplied from a commercial power source, electric power is stored in the storage battery and is switched to the first supply path by the selector switch unit, and when the commercial power source is shut off, the selector switch unit An emergency power supply for the pellet stove that can be switched to the second supply path by
An interruption detection circuit for detecting the interruption of commercial power;
A switching signal for switching to the first supply path and stopping the supply of power to the pellet stove for a predetermined time after the predetermined time has elapsed after the interruption detection circuit detects the interruption of the commercial power supply is output to the changeover switch unit A delay switching control unit,
An emergency power supply device for a pellet stove characterized in that at least the burning of the wood pellets in the combustion chamber can be terminated by the amount of electricity remaining in the storage battery after the predetermined time has elapsed.
2. The pellet stove emergency power supply device according to claim 1, wherein the predetermined time is a time during which 40% to 80% of the total amount of electricity stored in the storage battery is consumed.
3. An emergency power supply device for a pellet stove according to claim 1 or 2, further comprising a notification means for notifying that the storage amount of the storage battery is small at the same time as the switching signal is output.
The emergency power unit for a pellet stove according to claim 3, wherein the notification means is an LED.
A pellet stove characterized in that the emergency power supply device for a pellet stove according to any one of claims 1 to 4 is housed and incorporated in a housing.
6. The pellet stove according to claim 5, wherein the emergency power supply device for the pellet stove can be pulled out of the housing by a slide rail.