JP5886574B2 - Gas heat source machine - Google Patents

Description

  The present invention includes a blower fan that supplies a combustion oxygen-containing gas necessary for combustion of fuel gas supplied from the gas burner to a combustion section provided with a gas burner, and heat retained by the fuel gas generated from the combustion section. A heat exchanger that heats the feed water flowing in the hot water supply pipe to generate hot water, and supplies a fuel gas supply amount supplied to the combustion section and a combustion oxygen-containing gas supply amount necessary for combustion of the fuel gas. Based on an input relationship index that is a relationship with the blower fan rotational speed to be determined, corresponding to the required hot water supply amount and hot water supply temperature, the amount of fuel gas supplied to the combustion unit and the rotational speed of the blower fan In general, the present invention relates to a gas heat source machine that receives all of the electric power necessary for operation from an external AC power source and operates to supply hot water.

  From the viewpoint of improving the stability of the lifeline, it is desirable that the gas utilization device can be operated by an emergency power source such as a dry battery or a car battery in case of an emergency such as a power failure. Therefore, in the prior art, a gas stove that operates by receiving power supply from a commercial power source in normal times and from an auxiliary power source in an emergency has been invented (see, for example, Patent Document 1). For example, the gas stove disclosed in Patent Document 1 is configured to operate upon receiving power supply from a dry cell type auxiliary power supply during a power failure.

JP 2008-8536 A

  However, the configuration in which the auxiliary power source is a dry battery as in Patent Document 1 is capable of supplying sufficient power to a stove with low power consumption, but in a gas heat source machine with high power consumption, compared to a stove. Since power consumption is intense, it can be used only for a short time, which is inconvenient. Therefore, there is a need for a gas heat source machine that can operate for a long time even when power supply from a commercial power supply is cut off and power supply is supplied from an auxiliary power supply having a limited capacity.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a gas heat source that can be operated for a long time even when power supply from a commercial power supply is interrupted and power supply is supplied from an auxiliary power supply with a limited capacity. The point is to provide a machine.

In order to achieve the above object, a gas heat source machine according to the present invention comprises:
A blower fan that supplies a combustion unit including a gas burner with a combustion oxygen-containing gas necessary for combustion of fuel gas supplied from the gas burner;
A heat exchanger that generates hot water by heating the feed water flowing in the hot water pipe with the heat of the fuel gas generated from the combustion section, and
Corresponding to the required hot water supply amount and hot water supply temperature, the amount of fuel gas supplied to the combustion section and the rotational speed of the blower fan that determines the amount of oxygen-containing gas for combustion required for combustion of the fuel gas A combustion control unit that controls the amount of fuel gas supplied to the combustion unit and the rotational speed of the blower fan based on an input relationship index that is a relationship;
In a gas heat source machine that normally receives all the power required for operation from an external AC power supply and operates hot water supply,
The amount of water supplied through the hot water pipe is configured to be increased or decreased by a water amount servo provided in the hot water pipe,
Auxiliary power receiving means capable of receiving power from an auxiliary power source capable of supplying limited power in an interrupted state where power supply from the external AC power supply is cut off, and an auxiliary power source receiving power from the auxiliary power receiving means Auxiliary power receiving detection means for detecting the power receiving state is provided,
In the auxiliary power receiving state, the combustion control unit, wherein satisfies the input relationship index, and in the blowing fan according to the power-saving input area where power consumption is set to less Kunar so, to controlling the combustion in the combustion portion ,
In the power saving mode in which the combustion control unit controls the combustion of the combustion unit within the power saving input region, the combustion control unit performs control based on the input relation index corresponding to the required hot water supply amount and hot water supply temperature. When the fuel gas supply amount and the rotation speed of the blower fan become the fuel gas supply amount and the rotation number of the blower fan outside the power saving input region, and the required hot water supply amount and hot water supply temperature cannot be realized, The fuel gas supply amount and the rotation speed of the blower fan are set as the predetermined fuel gas supply amount and the rotation number of the blower fan corresponding to the predetermined fuel gas supply amount in the power saving input region, and the hot water supply water The amount of water supplied through the pipe is increased or decreased by the water amount servo to achieve the required hot water supply temperature.

According to the above-described characteristic configuration, the gas heat source device according to the present invention includes a fuel gas supply amount supplied to the combustion unit and a gas burner corresponding to the required hot water supply amount and hot water supply temperature based on the input relation indicator. By controlling the rotational speed of the blower fan that determines the amount of oxygen-containing gas for combustion required for the combustion of the supplied fuel gas, the amount of hot water flowing through the hot water supply pipe is adjusted, and the amount of hot water and hot water temperature are adjusted. adjust.
Here, the gas heat source device according to the present invention normally receives all of the electric power necessary for operation from the external AC power source and operates to supply hot water, but in a cut-off state in which the power supply from the external AC power source is cut off The auxiliary power supply means is configured to be able to receive power from an auxiliary power source capable of supplying limited power. As a result, even when the power supply from the external AC power supply is cut off, such as a power failure, the power supply from the auxiliary power supply such as a car battery can be received and operated.

  In the gas heat source apparatus according to the present invention, the auxiliary power supply receiving detection means detects the auxiliary power supply receiving state receiving power from the auxiliary power supply receiving means. And if it detects that it is an auxiliary power receiving state, it is comprised so that the combustion of a combustion part may be controlled within the power saving input area | region which satisfy | fills an input related parameter | index and has little power consumption by a ventilation fan. Thereby, in the auxiliary power receiving state in which electric power is supplied from the auxiliary power, the combustion of the combustion unit is controlled within the power saving input region where the power consumption by the blower fan is small. That is, an increase in power consumption due to an increase in the rotational speed of the blower fan is avoided, and combustion in the combustion section is controlled within a predetermined power consumption range.

In this way, the gas heat source device according to the present invention is configured to reduce the power consumption by the blower fan when the power supply from the commercial power supply is interrupted and the power supply from the auxiliary power supply with a limited capacity is received. Control to keep it at a minimum. Therefore, it is possible to provide a gas heat source machine that can be operated for a long time even when power supply from a commercial power supply is interrupted and power supply is received from an auxiliary power supply with a limited capacity.
In addition, according to the above-described characteristic configuration, the heating capacity is limited in the power saving mode that suppresses power consumption. Therefore, when the required hot water supply amount and hot water supply temperature cannot be realized at the same time, the amount of water to be heated is adjusted. Then, hot water is supplied giving priority to the hot water supply temperature. That is, according to the gas heat source apparatus having the above-described characteristic configuration, the amount of power that can be consumed is limited, and hot water can be supplied at a desired hot water supply temperature even in the power saving mode in which the heating capacity is limited.

The second characteristic configuration of the gas heat source machine according to the present invention is the first characteristic configuration,
In the power saving input area, in the input relation indicator, from the lowest power consumption index point where the power consumption is the lowest value to the upper limit power consumption index point which is the upper limit value of power consumption set based on a predetermined standard It is in a point that is an area within the range.

According to the above characteristic configuration, the power saving input area is changed from the lowest power consumption index point where the power consumption is the lowest value to the upper limit power consumption index point which is the upper limit value of the power consumption set based on a predetermined standard. Set as an area within the range of. Thus, the user can set an upper limit value of power consumption based on a predetermined standard.
For example, the upper limit value of the amount of power consumed by the blower fan of the gas heat source unit can be set based on the amount of power supplied by the auxiliary power source by setting the amount of power supplied by the auxiliary power source as the predetermined reference. . This makes it possible to set a flexible and appropriate upper limit power consumption index point based on the amount of power supplied from the auxiliary power source that is an input to the gas heat source unit in the shut-off state.

A third characteristic configuration of the gas heat source machine according to the present invention is the first characteristic configuration,
The power saving input area is a range from the lowest power consumption index point at which power consumption is the lowest value in the input-related index to an allowable maximum power consumption index point that is higher than the minimum power consumption index point by a predetermined allowable power consumption amount. It is in a point that is an area within the range.

According to the above characteristic configuration, the power saving input area is changed from the lowest power consumption index point at which the power consumption is the lowest value to the allowable maximum power consumption index point that is higher than the minimum power consumption index point by a predetermined allowable power consumption amount. Is set as a region having a predetermined allowable range with the lowest power consumption index point as a base point. Thereby, power consumption can be kept within a predetermined allowable range from the lowest power consumption index point.
In addition, since the gas heat source device can be used within a predetermined allowable range as in normal times, the user is not excessively aware of power saving. Therefore, it is possible to realize power saving while minimizing the inconvenience felt by the user.
The allowable power consumption that defines the predetermined allowable range can be configured to be set as a ratio or an absolute amount. For example, the allowable power consumption may be set as a ratio with respect to the power consumption at the lowest power consumption index point, or may be set as a power consumption as an absolute amount instead of a ratio.

The fourth characteristic configuration of the gas heat source machine according to the present invention is the first characteristic configuration,
The combustion control unit is configured to control combustion of the combustion unit at the lowest power consumption index point at which the power consumption is the lowest value in the input relation index.

  According to the above characteristic configuration, the power saving input area is set to the lowest power consumption index point at which the power consumption is the lowest value by the input relation index. As a result, power consumption can be minimized. Therefore, it is possible to provide a gas heat source machine that can be operated for a long time to the maximum with an auxiliary power source with a limited amount of power.

The fifth characteristic configuration of the gas heat source machine according to the present invention is any one of the first to fourth characteristic configurations,
The gas burner is provided with a plurality of burner parts that can individually supply and shut off fuel gas, and according to the amount of hot water supplied, the number of burner parts that supply fuel gas is increased or decreased to provide a plurality of combustion stages. Configured to be feasible,
In each combustion stage, the input-related indicator is set,
As the power saving input area, a power saving input area is set for each input relation index of each combustion stage.

  According to the above characteristic configuration, the gas burner includes a plurality of burner portions that can individually supply and shut off fuel gas, and the number of burner portions that supply fuel gas is increased or decreased according to the amount of hot water supplied. Thus, in the gas heat source machine capable of increasing the heating capacity to the number of burners in accordance with the amount of hot water supply by being configured to be able to realize a plurality of combustion stages, it is described in the above-described 1-4 characteristic configurations. Apply power saving control. Thereby, in a gas heat source machine with high heating capacity and high hot water supply capacity capable of supplying a predetermined amount of hot water at a predetermined hot water supply temperature in a short time, it is configured to suppress power consumption and enable long-time operation. Can do.

The sixth characteristic configuration of the gas heat source machine according to the present invention is the fourth characteristic configuration,
The gas burner includes a plurality of burner portions capable of individually supplying and shutting off fuel gas, and increasing or decreasing the number of burner portions for supplying fuel gas according to the amount of hot water supply, thereby providing a plurality of combustion stages. Configured to be feasible,
In each combustion stage, the input-related indicator is set,
The combustion control unit controls combustion of the combustion unit at any one of the minimum power consumption index points at which the power consumption is the lowest value in the input relation index of each combustion stage.

According to the above characteristic configuration, in the gas heat source apparatus that includes a plurality of burner portions and can realize a plurality of combustion stages, the power consumption is set to the lowest value in each selected combustion stage. Therefore, a gas heat source apparatus that can maintain the high heating capacity (and hence the hot water supply capacity) by providing a plurality of combustion stages, minimizes power consumption in each combustion stage, and enables operation for as long a time as possible. Can be provided.
Also, if the required fuel gas supply (and thus the heating capacity) changes abruptly when the number of combustion stages is changed during tapping, the number of combustion stages is fixed until the hot-water tap is closed and the heating capacity increases rapidly. You may comprise so that a change may be avoided and hot water temperature may be stabilized.

Configuration diagram of gas heat source machine Configuration diagram of gas heat source unit The figure which shows the mode of the electric power supply in the gas heat source machine at the normal time (power receiving state) The figure which shows the mode of the electric power supply in the gas heat source machine at the time of emergency (cut-off state) The graph which shows the relationship between the fuel gas supply amount at the normal time, and the blower fan rotation speed The graph which shows Example 1 of power saving mode A graph explaining Example 1 of power saving mode The graph which shows Example 2 of power saving mode The graph which shows the modification of Example 2 of a power saving mode The graph which shows Example 3 of power saving mode

  An embodiment of a gas heat source device according to the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a gas heat source machine 1 according to the present invention.

[Configuration of gas heat source unit]
As shown in FIG. 1, the gas heat source unit 1 is connected to the heat source unit body 2 via a connection line 6 via a heat source unit body 2 connected to an external AC power source 8 that supplies an AC current and an inverter 4. And a remote control device 3 for instructing the heat source machine body 2 to operate, which is operated by a direct current. In FIG. 1, an external AC power supply 8 that supplies an AC current at a voltage of 100 V is connected to the heat source machine body 2.

  The remote control device 3 operates as a controller capable of setting a target temperature of hot water. In the gas heat source apparatus 1 shown in FIG. 1, as a remote control device 3, a kitchen remote control 3a, a bathroom remote control 3b, and a floor heating remote control 3c are installed in a kitchen a, a bathroom b, and a living room c, respectively. 6a, 6b, 6c) is connected to the heat source machine body 2.

The gas heat source device 1 includes a connection terminal 5 for detachably connecting an auxiliary power source that supplies a direct current to the remote control device 3 that is a device exposed to the outside. In FIG. 1, the connection terminals 5 (5a, 5b, 5c) are respectively connected to the remote control devices 3 (kitchen remote control 3a, bathroom remote control 3b, floor heating remote control 3c) installed in the kitchen a, bathroom b, and living room c. Is provided. A car battery 9 as an auxiliary power source can be easily connected to the gas heat source unit 1 by a user through a connection terminal 5a provided in the kitchen remote control 3a.
FIG. 1 shows a state in which a car battery 9 is actually connected. In a situation where the power supply from the external AC power source 8 to the heat source machine body 2 is cut off due to a power failure or the like, the car that is an auxiliary power source is shown. It depends on the power supply from the battery 9.

  In FIG. 1, the gas heat source unit 1 includes a bypass capacitor 7, which is a mitigating means for mitigating an inrush current from an auxiliary power source that accompanies start-up of equipment in the heat source unit main body 2, a connection terminal 5, a heat source unit main body 2, and the like. The connecting line 6 is provided. As a result, even when a so-called sharp or noise rectangle is generated in the current waveform due to the start-up of equipment in the heat source unit such as a blower fan with a large inrush current, the breaker breaks due to the inrush current and the power supply voltage Stable electric power can be supplied by suppressing adverse effects such as destabilization.

  As shown in FIG. 1, the gas heat source unit 1 includes a blower fan 14 that supplies a combustion oxygen-containing gas necessary for combustion of fuel gas supplied from the gas burner 13 to a combustion unit 11 that includes a gas burner 13. And a heat exchanger 12 that generates hot water by heating the feed water flowing in the hot water supply pipe with the heat held by the fuel gas generated from the combustion section 11. Then, in accordance with the required hot water supply amount and hot water supply temperature set and input from the remote control device 3, the fuel gas supply amount supplied to the combustion section 11 and the combustion oxygen-containing gas supply amount necessary for the combustion of the fuel gas are determined. Based on an input relationship index (for example, an index corresponding to an input line indicated by a solid line in FIG. 5 described later) that is a relationship with the rotation speed of the blower fan 14 to be supplied, the fuel gas supply amount supplied to the combustion unit 11 and the blower fan 14 The combustion control unit 10 for controlling the number of revolutions of the engine is provided, and at the normal time, all the electric power necessary for the operation is received from the external AC power supply 8 to operate the hot water supply (in addition, details of control of the fuel gas supply amount and the blower fan revolution number) Will be described later).

[Configuration of heat source main unit]
FIG. 2 shows the configuration of the heat source machine body 2. The heat source machine main body 2 shown in FIG. 2 has, as the combustion unit 11, a combustion unit 11X of a hot water supply system 2X that heats supplied water and supplies the hot water as hot water in order to supply new hot water. This is a so-called two-can three-water source heat source that includes a combustion section 11Y of a circulation system 2Y that circulates, heats, and recirculates hot water stored in the heating tank 31 and the bathtub 42 for firing.

[Hot water system]
The heat source machine main body 2 heats the water supplied from the upstream to the hot water supply system 2X by the combustion unit 11X and supplies hot water pipe 21 to be supplied to the downstream hot water tap 25 as hot water and water flowing through the hot water pipe 21. A combustion unit 11X including a heat exchanger 12X for heating and a gas burner 13X and a blower fan 14X for blowing air to the combustion unit 11X are provided. In FIG. 2, the hot water faucet 25 includes a faucet 25 a for the kitchen a and a shower 25 b for the bathroom b. Further, the gas burner 13X includes a plurality of burner portions (not shown) that can individually supply and shut off fuel gas, and increase or decrease the number of burner portions that supply fuel gas according to the amount of hot water supply. The fuel gas supply amount (input amount) is configured to be capable of realizing a plurality of combustion stages (combustion states) that are different in stages.

  In the hot water supply system 2X, the bypass pipe 23 that bypasses the combustion section 11X is diverted via the mixing valve 22 that adjusts the flow rate of water that flows through the bypass pipe 23 upstream of the combustion section 11X, and the combustion section It is connected to the hot water supply pipe 21 so as to join downstream of 11X. In addition, a water amount servo 24 for adjusting the amount of hot water supply is provided downstream of the joining point of the hot water supply water pipe 21 and the bypass pipe 23. Further, a flow meter 26a for measuring the flow rate of hot water supplied to the hot water tap 25 and a thermometer 26b for measuring temperature are provided upstream of the hot water tap 25, and the flow meter 26a and the thermometer 26b are used for measurement. The obtained temperature is transmitted to the combustion control unit 10.

[Hot water supply system: Adjustment of hot water temperature by adjusting the heating amount]
In the hot water supply system 2 </ b> X, hot water flowing through the hot water supply pipe 21 is heated by the combustion unit 11 </ b> X based on the target temperature of hot water supply set by the remote control device 3, and hot water is supplied to the hot water tap 25. Specifically, the combustion control unit 10 supplies the gas burner 13X to the gas burner 13X based on the target temperature set by the remote control device 3, the amount of hot water measured by the flow meter 26a, and the temperature of hot water measured by the thermometer 26b. By adjusting the fuel gas supply amount and the combustion air amount corresponding to the fuel gas supply amount (actually the number of rotations of the fan), the heating amount in the combustion section 11X is adjusted, and the temperature of the hot water supplied to the hot water tap 25 is adjusted. adjust.

That is, when the hot water temperature measured by the thermometer 26b is lower than the target temperature of the hot water set by the remote controller 3, the combustion control unit 10 increases the amount of heating in the combustion unit 11X in order to increase the hot water temperature. In order to increase it, the amount of fuel gas supplied to the gas burner 13X is increased. Further, the rotational speed of the blower fan 14X is controlled so as to correspond to the amount of fuel gas supplied to the gas burner 13X.
On the other hand, when the hot water temperature measured by the thermometer 26b is higher than the target temperature set by the remote controller 3, the fuel supplied to the gas burner 13X is decreased in order to reduce the heating amount in the combustion section 11X in order to lower the hot water temperature. Reduce gas supply. Further, the rotational speed of the blower fan 14X is controlled so as to correspond to a decrease in the amount of fuel gas supplied to the gas burner 13X.
In this way, the combustion control unit 10 determines the amount of fuel gas supplied to the gas burner 13X and the rotational speed of the blower fan 14X based on the hot water temperature measured by the thermometer 26b and the target temperature set by the remote control device 3. Is controlled to adjust the hot water supply temperature of hot water supplied to the hot water tap 25.

FIG. 5 shows the relationship between the fuel gas supply amount and the rotational speed of the blower fan 14X. FIG. 5 shows an example in which the gas burner 13X is composed of a plurality (four in the illustrated case) of burner parts, and by changing the number of burner parts to be used, a plurality of stages of input adjustment can be performed. In FIG. 5, the first stage input line indicated by A is a line that uses a single burner part, and the second stage input line indicated by B is a line that uses two burner parts. As the number of burner units used increases, the fuel gas supply amount can be increased in stages.
Furthermore, the fuel gas supply amount supplied to the burner unit to be used can be adjusted within a predetermined range within each stage.

Further, according to the fuel gas supply amount supplied to the gas burner, the supply amount of combustion air corresponding to the supply amount (in other words, the rotational speed of the blower fan 14X) is determined in advance so as to keep the combustion in the burner in an optimum state. ing.
These are the input lines indicated by the solid lines in FIG.

  Although not described in detail, hot water supplied from the hot water supply system 2X described above in each of the hot water faucets 25 (faucet 25a in the kitchen a, shower 25b in the bathroom b, etc.) installed in a plurality of demand points. By configuring the water and water supplied from another water supply system not described above to be mixable, for example, downstream of the hot water supply system 2X, each hot water tap 25 is different simultaneously and differently. Hot water can be used at a hot water supply temperature and a different amount of hot water supply.

[Hot water supply system: Adjustment of hot water temperature by adjusting the amount of water]
In the first operating state in which the power supply from the external AC power supply 8 is normally performed, the combustion control unit 10 has a target temperature set by the remote control device 3 according to the amount of hot water determined by adjustment of the currant and the like. The input line shown in FIG. 5 is selected so that a hot water supply amount can be obtained, and the fuel gas supply amount and the rotational speed of the blower fan 14X are controlled. Furthermore, the operation of the mixing valve 22 is also controlled.
On the other hand, in the second operation state in which the power supply from the external AC power supply 8 is cut off and only a limited amount of DC power is obtained via the remote control device 3, the amount of fuel gas supplied to the gas burner 13X and the ventilation The gas heat source unit 1 is operated in the power saving mode in which the rotation speed of the fan 14X and the operation of the mixing valve 22 are specified. In the power saving mode, by controlling the operation of the water amount servo 24 or the water amount servo 24 and the mixing valve 22, it is possible to perform control giving priority to the hot water supply temperature.
That is, in the power saving mode, when the required hot water supply amount and hot water supply temperature cannot be realized at the same time by adjusting the heating capacity only by adjusting the fuel gas supply amount and the rotational speed of the blower fan 14X, the water amount servo 24 or the water amount servo By controlling the operation of 24 and the mixing valve 22 to increase or decrease the amount of water flowing in the hot water supply pipe and performing control giving priority to the hot water supply temperature, hot water supply at the required hot water supply temperature can be realized.

Specifically, in the second operating state, the combustion control unit 10 determines that the water amount servo 24 or the hot water supply temperature measured by the thermometer 26b is lower than the target temperature of hot water supply set by the remote control device 3. By controlling the operation of the water amount servo 24 and the mixing valve 22 and reducing the amount of water flowing through the combustion unit 11X, the heating amount per unit volume of water flowing through the combustion unit 11X is increased, and the hot water tap 25 The hot water supply temperature in the hot water can be raised.
When the hot water temperature measured by the thermometer 26b is higher than the target temperature of hot water set by the remote control device 3, the operation of the water volume servo 24 or the water volume servo 24 and the mixing valve 22 is controlled, and the combustion section By increasing the amount of water flowing through 11X, the heating amount per unit volume of water flowing through the combustion unit 11X can be reduced, and the hot water supply temperature of the hot water tap 25 can be lowered.
In addition, said control is control which gives priority to hot water supply temperature to hot water supply amount. Accordingly, the hot water supply amount requested by the user cannot always be supplied.

[Circulating system]
The circulation system 2Y includes a heating tank 31 that stores a heating medium used for heating or reheating, a heating circulation pump 32 that sends out the heating medium stored in the heating tank 31, and a heating circulation pump 32 from the heating tank 31. The heat heated by the combustion section 11Y, the heat transfer pipe 33 that connects the heating tank 31 and the combustion section 11Y, the combustion section 11Y that heats the sent heat medium and gives heat for heating or reheating, and the combustion section 11Y A high-temperature forward pipe 34 that supplies the medium to the high-temperature heating equipment 41 and a heat-medium return pipe 35 that radiates heat at the high-temperature heating equipment 41 and returns the temperature-reduced heat medium to the heating tank 31 are provided.
With such a configuration, in the circulation system 2Y, the heat medium stored in the heating tank 31 can be heated by the combustion unit 11Y to be a high-temperature heat medium and used for high-temperature heating. That is, the heat medium stored in the heating tank 31 is circulated through the heat medium forward pipe 33, the combustion unit 11Y, the high temperature forward pipe 34, the high temperature heating equipment 41, the heat medium return pipe 35, and the heating tank 31, so that the high temperature heating is performed. Can be used.
The circulatory combustion unit 11Y includes a heat exchanger 12Y, a gas burner 13Y, and a blower fan 14Y, similar to the hot water supply combustion unit 11X. As the high-temperature heating equipment 41, for example, a bathroom drying heating device, a fan convector, or the like can be considered.

In circulation system 2Y, in order to supply the heat medium to low-temperature heating facility 43, low-temperature forward pipe 36 that supplies the heat medium sent from heating tank 31 to low-temperature heating facility 43 includes heating tank 31 and combustion unit 11Y. Are branched from the heat transfer pipe 33 and connected to the low-temperature heating equipment 43. The heat medium used in the low-temperature heating equipment 43 and having a temperature lowered by heat radiation is configured to flow through the heat medium return pipe 35 and return to the heating tank 31.
With such a configuration, in the circulation system 2Y, the amount of heat of the heat medium stored in the heating tank 31 can be used for low-temperature heating. That is, the heat medium stored in the heating tank 31 is circulated through the heat medium forward pipe 33, the low temperature forward pipe 36, the low temperature heating equipment 43, the heat medium return pipe 35, and the heating tank 31 to be used for low temperature heating. it can.
As the low-temperature heating equipment 43, for example, a floor heater or a panel radiator can be considered.

Further, the circulation system 2Y branches from the high temperature outgoing pipe 34 and passes through a high temperature bypass pipe 37 connected to the heat medium return pipe 35, and hot water that is remedied by the heat quantity of the heat medium flowing through the high temperature bypass pipe 37. A memorial circulation pipe 38 to be flown, a memorial circulation pump 39 for circulating hot water in the memorial circulation pipe 38, and hot water circulating through the memorial circulation pipe 38 by the amount of heat of the heat medium flowing through the high temperature bypass pipe 37. And a memorial heat exchanging unit 40 for memorializing.
With such a configuration, in the circulation system 2Y, a part of the heat medium heated by the combustion unit 11Y and having a high temperature can be used in memory. In addition, the heat medium whose temperature has been decreased for use in reheating can be returned to the heating tank 31 through the heat medium return pipe 35 and reused for heating or reheating.

[Configuration of power supply]
The gas heat source unit 1 includes a first operation state in which power is supplied from an external AC power source to the remote control device 3 via the heat source unit body 2 and the inverter 4, and the remote control device 3 from the auxiliary power source connected to the connection terminal 5. And a second operating state in which power is supplied to the heat source unit main body 2 for operation.

  The gas heat source unit 1 switches between the first operation state and the second operation state based on whether or not electric power is supplied from the external AC power supply. Specifically, the gas heat source unit 1 is operated in the first operation state in a power receiving state in which power can be supplied from the external AC power source, and in a cutoff state in which the power supply from the external AC power source is interrupted. It is operated in the second operating state. That is, the gas heat source unit 1 is supplied with electric power from the external AC power supply 8 in the power receiving state (normal time) and from the battery 9 that is an auxiliary power source in the cut-off state (emergency time) to operate to supply hot water. With such a configuration, the gas heat source device 1 is operated by receiving power supply from a suitable power source according to the situation.

Such switching control between the first operation state and the second operation state includes, for example, a measurement device that measures the presence or absence of power supply from an external AC power supply or an auxiliary power supply, and a measurement result by the measurement device, A combustion control unit that performs switching control of circuit connection according to the measurement result can be used.
That is, the gas heat source unit 1 includes an auxiliary power receiving unit that can receive power from the battery 9 that is an auxiliary power source capable of supplying limited power in a cut-off state in which the power supply from the external AC power source 8 is cut off. Auxiliary power receiving detection means for detecting an auxiliary power receiving state receiving power from the auxiliary power receiving means is provided. With such a configuration, the gas heat source unit 1 is supplied with power from the battery 9 by the auxiliary power receiving unit and is in an auxiliary power receiving state receiving power from the auxiliary power receiving unit in the cut-off state. Detected by power reception detection means.
In FIG. 1, the connection terminal 5 provided in the remote control device 3 corresponds to auxiliary power receiving means. Moreover, the combustion control part 10 which detects an energization state from the measurement result of the measuring device which is not shown in figure, and detects the auxiliary power receiving state received from the auxiliary power receiving means corresponds to the auxiliary power receiving detection means.
The combustion control unit 10 receives a measurement result of a measuring device (not shown), detects the presence / absence (energization state) of power supply from an external AC power supply or auxiliary power supply, and switches an appropriate circuit connection according to the measurement result. Take control.
Below, the structure of the electric power supply in each of a 1st driving | running state and a 2nd driving | running state is demonstrated.

[Configuration of power supply in the first operation state]
FIG. 3 shows a configuration of power supply in a first operation state (power receiving state) that operates by receiving power supply from an external AC power source 8 that is an AC power source.
When the combustion control unit 10 detects from the measurement result of the measuring device (not shown) that the power supply state to the gas heat source unit 1 is a power reception state in which power supply from the external AC power supply 8 can be received. The operating state of the gas heat source unit 1 is set to the first operating state, and the external AC power supply 8 is connected to the heat source unit main body 2. Thereby, apparatuses, such as a ventilation fan in the heat-source unit main body 2, operate | move by receiving electric power supply from the external alternating current power supply 8 which is alternating current power supply.

  Further, in the first operation state, the remote control device 3 receives power supply from the external AC power supply 8 through the connection line 6 and the heat source device body 2. Since the remote control device 3 operates with a direct current, in this case, the remote control device 3 is connected to the heat source machine main body 2 via the connection line 6 via the inverter 4. With such a configuration, the gas heat source device 1 can convert the alternating current supplied from the external alternating current power supply 8 into a direct current by the inverter 4 and then supply the alternating current to the remote control device 3. Thereby, the gas heat source unit 1 can operate the heat source unit main body 2 and the remote control device 3 by receiving power supply from the external AC power source 8 that is an AC power source.

[Configuration of power supply in the second operation state]
FIG. 4 shows a configuration of power supply in a second operation state (cut-off state) that operates by receiving power supply from a battery 9 that is a DC power source.
When the combustion control unit 10 detects from the measurement result of the measuring device (not shown) that the power supply state to the gas heat source unit 1 is a cut-off state in which the power supply from the external AC power supply 8 is cut off, The operation state of the gas heat source device 1 is set to the second operation state, and the battery 9 is connected to the connection terminal 5 provided in the remote control device 3. As a result, the remote control device 3 that operates with direct current operates upon receiving power supply from the battery 9 that is a direct current power source.
As described above, the gas heat source unit 1 receives power supply from the battery 9 that is a DC power supply through the connection terminal 5 that is an auxiliary power supply means in a cut-off state in which the power supply from the external AC power supply 8 is cut off. Operate. Further, the combustion control unit 10 is in an auxiliary power receiving state in which such an energized state is detected from a measurement result of a measuring device (not shown) and is received from the battery 9 which is a direct current power supply via auxiliary power receiving means. This is detected and it is confirmed that the gas heat source unit 1 is operating normally as the second operating state.

Further, in the second operation state, the heat source machine main body 2 receives power supply from the battery 9 via the remote control device 3 through the connection line 6. Here, the heat source machine main body 2 is provided with a bypass capacitor 7 that is a mitigating means for relaxing the inrush current from the auxiliary power source accompanying the start of the equipment in the heat source machine main body 2 between the connection terminal 5 and the heat source machine main body 2. The connection line 6 is provided.
With such a configuration, the gas heat source unit 1 stabilizes the direct current supplied from the battery 9 by reducing the influence of the actuator in the heat source unit body 2 having a large inrush current such as the blower fan 14 by the bypass capacitor 7. In this state, power can be supplied to the heat source machine main body 2. Thereby, the gas heat source device 1 can operate the heat source device main body 2 and the remote control device 3 by receiving power supply from the battery 9 which is a DC power source.

[Power saving mode in the second operation state]
The second operation state is an operation state in a cut-off state such as a power failure in which power supply from the external AC power supply 8 is cut off, and is a so-called emergency operation state. In such a second operation state, the gas heat source unit 1 is configured to operate in a power saving mode with reduced power consumption because the gas heat source unit 1 is in an auxiliary power receiving state in which power is received from an auxiliary power source with limited power. Yes.

That is, the gas heat source unit 1 has the combustion unit 11 in the power saving input region in which the combustion control unit 10 satisfies the input-related index and the power consumption by the blower fan 14 is low in the second operation state and thus the auxiliary power receiving state. It is comprised so that combustion of may be controlled.
The input relationship index is an index indicating the relationship between the fuel gas supply amount G supplied to the combustion unit 11 and the blower fan rotation speed N that determines the combustion oxygen-containing gas supply amount required for combustion of the fuel gas. These are stored in the combustion control unit 10 as mathematical formulas or numerical information representing a graph as shown in FIG.

As described above, FIG. 5 shows a fuel gas supply amount G supplied to the combustion unit 11 and a combustion oxygen-containing gas supply amount necessary for combustion of the fuel gas in a normal time when power is supplied from the external AC power supply 8. It is a graph which shows the input relationship parameter | index which is a relationship with the ventilation fan rotation speed N which determines. The four graphs shown in FIG. 5 show the input lines in each combustion stage (up to four combustion stages in the case of FIG. 5).
In the normal first operation state, it is possible to receive sufficient power supply, so that it is possible to operate at any point on each input line, that is, the required amount of hot water supply is used as the target temperature. Supply.
On the other hand, in the second operation state that is an emergency, since only limited power supply can be received, it is possible to operate and obtain within a limited range where the power consumption is small among each input line. Hot water is supplied in a range that can be realized with a sufficient amount of electricity.

For example, in the first operating state is normal, when the user sets the target temperature by a remote control device 3 to T _A, combustion control unit 10, the hot water supply amount, the correspondence table holding hot water temperature and internally (not shown ), The fuel gas supply amount is determined as G _A , and the blower fan rotation speed is determined as N _A.

In FIG. 5, in the range where there are two input lines indicating the rotational speed N of the blower fan with respect to one fuel gas supply amount G, the rotational speed N of the blower fan is determined based on the most recently adopted input line. To do.
For example, when a range (ii) where there is an input line showing two blower fan rotation speeds N for one fuel gas supply amount G is to belong to the range (ii) due to a change from low temperature to high temperature Determines the blower fan speed N based on the input line A employed in the range (i). And when it becomes the temperature of the range (iii), the ventilation fan rotation speed N is determined based on the input line B.
In addition, when it is in the range (ii) due to the change from the high temperature to the low temperature, the blower fan rotation speed N is determined based on the input line B employed in the range (iii). And when it becomes the temperature of the range (i), the ventilation fan rotation speed N is determined based on the input line A.

On the other hand, in the second operation state that is a so-called emergency such as a power failure, the gas heat source unit 1 operates in a power saving mode that suppresses power consumption, and is controlled to suppress the rotational speed N of the blower fan. Since the blower fan rotation speed N has a large influence on the power consumption amount in the combustion unit 11, the power consumption amount in the power saving mode can be suppressed in the gas heat source unit 1 by suppressing the blower fan rotation speed N.
It is conceivable that the blower fan rotation speed N in the power saving mode is suppressed based on various criteria as shown in the following embodiments.

[Embodiment 1 of the power saving mode: below a predetermined number of revolutions]
FIG. 6 shows an example of setting the blower fan rotation speed N in the power saving mode, and a fuel gas supply amount G when a range in which the blower fan rotation speed N is suppressed to the upper limit value Ne or less is set as a power saving input region. It is a graph which shows the relationship of the ventilation fan rotation speed N. FIG.
Here, in the range in which the blower fan rotation speed N is kept below the upper limit value Ne, the power consumption when the blower fan rotation speed is Ne is the upper limit value of power consumption. In the input-related index, the area is within the range from the lowest power consumption index point where the power consumption is the lowest value to the upper limit power consumption index point which is the upper limit value of power consumption set based on a predetermined standard. It can be said that it is a graph showing the setting of the fuel gas supply amount G and the blower fan rotation speed N in the case of In this case, the upper limit value Ne of the blower fan rotation speed is “predetermined reference”, and the power consumption when the blower fan rotation speed is Ne is “the upper limit value of power consumption set based on the predetermined reference”. Applicable.
By setting in this way, the power consumption in the blower fan 14 in the power saving mode can be suppressed within the range up to the upper limit power consumption index point that is the upper limit value of power consumption set based on a predetermined standard. .

When the power saving input region is set in this way, the combustion control unit 10 sets the fuel gas supply amount G and the blower fan rotation speed N at points on the input lines g1, g2, g3, and g4. For example, in the power saving mode shown in FIG. 6, when the combustion stage has two stages, the combustion control unit 10 has the fuel gas supply amount G _B in the power saving input area where the blower fan rotation speed N is Ne or less. it can be set to the blower fan rotational speed N _B.

On the other hand, according to the power saving mode shown in FIG. 6, the fuel gas supply amount G and the blower fan rotational speed N are set to the fuel gas supply amount G _C outside the power saving input region where the blower fan rotational speed N exceeds Ne.
The fan fan rotation speed N _C cannot be set.
Thus, if the fuel gas supply amount G and the blower fan rotation speed N are limited to points on the input lines g1, g2, g3, and g4, the possible fuel gas supply amount G becomes discontinuous. Thus, as the fuel gas supply amount G _C in FIG. 7, a case requiring no fuel gas supply amount G on the input line, for example, among the input lines closer to the fuel gas supply amount G, the fuel gas supply amount G the minimum amount of fuel gas supplied on the larger side of the input line (input line g3 for fuel gas supply amount G _C in for example Fig. 7) (e.g., fuel gas supply amount G _C1 for fuel gas supply amount G _C in FIG. 7) The fuel gas supply amount is G, and the blower fan speed is N.
_Is set to the blower fan rotational speed N _C1 corresponding to the fuel gas supply amount G _C1 . In addition to this, by adjusting the amount of water by controlling the operation of the water amount servo 24 or the water amount servo 24 and the mixing valve 22 as described above, the power consumption amount is controlled within a predetermined range and controlled to a desired hot water supply temperature. Thus, the combustion control unit 10 and the gas heat source unit 1 are configured.
Alternatively, among the fuel gas supply amount input line close to G, the maximum amount of fuel gas supplied on (input line g2 for fuel gas supply amount G _C in for example Fig. 7) the fuel gas supply amount G is smaller side input line (e.g., fuel gas supply amount G _C2 with respect to the fuel gas supply amount G _C in FIG. 7) as a fuel gas supply amount G, the blowing fan rotational speed N to the blower fan rotational speed N _C2 corresponding to the fuel gas supply amount G _C2 Set. And in addition to this, the combustion control part 10 and the gas heat source machine 1 are comprised so that it may control to desired hot-water supply temperature by adjusting the amount of water mentioned above.
For the sake of simplicity in the above, the arrangement for setting the maximum of the fuel gas supply amount G _C2 on minimum fuel gas supply amount G _C1 or input line g2 on input line g3 instead of the fuel gas supply amount G _C Description However, these settings are merely examples, and other appropriate values may be set.

In the above description, the power saving input area is set based on the upper limit value Ne of the blower fan speed N. However, instead of the blower fan speed N, the amount of power that can be obtained in the second operating state. Based on (for example, the amount of power supplied from the auxiliary power source), an upper limit power consumption index point that is the upper limit value of power consumption is set based on the standard (for example, 90% of the amount of power supplied from the auxiliary power source is The upper limit power consumption index point may be used.
Thus, by setting it as the structure which sets the upper limit of a power saving input area | region based on the electric energy which can be obtained in a 2nd driving | running state, the electric energy consumed with the ventilation fan of a gas heat source machine is 2nd. It becomes easy to fall within a predetermined range with respect to the amount of power that can be obtained in the operating state.

[Embodiment 2 of power saving mode: allowable range from lowest point]
FIG. 8 shows another example of setting the blower fan rotational speed N in the power saving mode, from the minimum value of the blower fan rotational speed N in the input lines g1, g2, g3, and g4 of each combustion stage. FIG. 5 is a graph in which a predetermined allowable range α is set as a power saving input region.
That is, FIG. 8 shows that the gas burner includes a plurality of burner portions that can individually supply and shut off the fuel gas, and the number of burner portions that supply the fuel gas is increased or decreased according to the amount of hot water supply. Fuel in a case where a plurality of combustion stages can be realized, an input related index is set in each combustion stage, and a power saving input area is set for each input related index of each combustion stage as a power saving input area It is a graph which shows the setting of the gas supply amount G and the ventilation fan rotation speed N. A predetermined allowable range α for each combustion stage from the minimum value of the blower fan rotation speed N in the input lines g1, g2, g3, g4 of each combustion stage in FIG. 8 is set for each input relation indicator of each combustion stage. It corresponds to “Power-saving input area”. The allowable range α can be set, for example, as a power consumption (allowable power consumption) or a ratio (for example, “20% of the minimum value of the blower fan rotation speed N”).
By setting in this way, the power consumption in the blower fan 14 in the power saving mode can be suppressed within a predetermined range.

In addition, although the structure which sets a power saving input area | region to each combustion stage was illustrated above, the power saving input area | region does not necessarily need to be set to each combustion stage. As another embodiment, regardless of the combustion stage, the power-saving input area is the highest in the input-related index that is higher than the minimum power consumption index point by a predetermined allowable range from the lowest power consumption index point where the power consumption is the lowest value. It is good also as a structure set as an area | region within the range to an electric power consumption index point.
For example, in FIG. 9, the lowest power consumption index point of the input line g3 corresponds to the lowest power consumption index point having the lowest power consumption among all the input lines g1, g2, g3, and g4 of each combustion stage. Therefore, as shown in FIG. 9, regardless of the combustion stage, from the lowest power consumption index point Nb of the input line g3, the highest power consumption whose power consumption is high by a predetermined allowable range α from the lowest power consumption index point Nb. An area within the range up to the index point Nt may be set as a power saving input area. In other words, the power saving input area is the highest power whose power consumption is higher than the lowest power consumption index point Nb by a predetermined allowable range α from the lowest power consumption index point Nb where the power consumption is the lowest value in the input relation index. It is good also as a structure made into the area | region within the range to the consumption index point Nt.

[Embodiment 3 of power saving mode: lowest point]
FIG. 10 shows another example of setting the blower fan rotation speed N in the power saving mode. The blower fan rotation speed N is set to the minimum at the input lines g1, g2, g3, and g4 of the respective combustion stages. it is a graph that a value set in (fuel gas supply amount _{G 1, G 2, G 3} , is the point at G _4).
That is, FIG. 10 shows that the gas burner has a plurality of burner parts that can individually supply and shut off the fuel gas, and the number of the burner parts that supply the fuel gas is increased or decreased according to the amount of hot water supply. A plurality of combustion stages are configured to be realized, and an input relation index is set in each combustion stage, and the combustion control unit sets the lowest power consumption index point with the lowest power consumption in the input relation index of each combustion stage. It is a graph which shows the setting of the fuel gas supply amount G and the ventilation fan rotation speed N in any case when combustion of a combustion part is controlled. The point corresponding to the minimum value of the blower fan speed N in the input line of each combustion stage in FIG. 10 corresponds to the “minimum power consumption index point at which the power consumption is the lowest value in the input relation index of each combustion stage”. .

When the power saving input area is set in this way, the possible fuel gas supply amount G is discontinuous as in the second embodiment of the power saving mode. Therefore, when a fuel gas supply amount G not on the input line is requested, as in the second embodiment, for example, the fuel gas supply amount corresponding to the minimum rotational speed of the blower fan in the normal input line is set to the fuel gas. A configuration that sets the supply amount, and in addition to this, adjusts the water amount by controlling the operation of the water amount servo 24 or the water amount servo 24 and the mixing valve 22 as described above, thereby controlling the desired hot water supply temperature while suppressing power consumption. Can be realized.
If the required fuel gas supply (and thus the heating capacity) changes suddenly when the number of combustion stages is changed during tapping, the number of combustion stages is fixed until the hot-water tap is closed, and the heating capacity increases rapidly. You may comprise so that a change may be avoided and hot water temperature may be stabilized. For example, in FIG. 10, when the number of combustion stages is changed from two to three, there is a difference in heating capacity between G ₂ and G ₃ . Therefore, when priority is given to the stability of hot water temperature, the number of combustion stages is not changed from 2 to 3 (or 3 to 2) until the hot water tap is closed, and the number of combustion stages is 2 (or (3 steps) may be fixed to avoid a rapid change in heating capacity.
Alternatively, whether or not the number of combustion stages can be changed may be controlled based on the magnitude of the change in heating capacity. For example, in FIG. 10, the difference in heating capacity between G ₂ and G ₃ when the number of combustion stages is changed from 2 to 3 is the same as G ₁ when the number of combustion stages is changed from 1 to 2. larger than the difference between the heating capacity of the G _2. In such a case, based on the magnitude of the change in the heating capacity, although the change in the heating capacity is relatively small, the change from the first stage to the second stage (or from the second stage to the first stage) is recognized. You may comprise so that the change from the combustion stage number 2 stage | paragraph 3 stage (or 3 stage to 2 stage | paragraphs) with a large change may not be recognized.

Moreover, although the structure which sets a power saving input area | region to each combustion stage was illustrated above, the power saving input area | region does not necessarily need to be set to each combustion stage. That is, regardless of the combustion stage, the lowest power consumption index point power consumption in the input relationship index is lowest value (the power consumption index point of the fuel gas supply amount in FIG. 10 G _3), for controlling the combustion of a combustion unit It is good also as a structure.

[Notice of out of capacity in the second operation state]
In the second operation state, when the supply voltage from the battery 9 serving as the auxiliary power source falls below a predetermined value, the combustion control unit 10 displays a warning on the remote control device 3 and stops the gas burner 13 to control the water amount servo. The operation is controlled so as to limit the amount of hot water supply by 24. As described above, the gas heat source device 1 notifies the user that the battery 9 is out of capacity by displaying a warning on the remote control device 3 and limiting the amount of hot water supplied by the water amount servo 24.

[Another embodiment]
(1) In the above embodiment, the remote controller 3 is installed in each of the kitchen a, the bathroom b, and the living room c as the kitchen remote controller 3a, bathroom remote controller 3b, and floor heating remote controller 3c. Although the configuration connected to the machine main body 2 is illustrated, the configuration is only an example. As another embodiment, for example, only one remote controller 3 may be provided, and the remote controller 3 may be installed only in any one of the kitchen a, the bathroom b, and the living room c. The remote control device 3 may be installed in a place other than the kitchen a, the bathroom b, and the living room c, and four or more remote control devices 3 may be connected to the heat source unit main body.

(2) In the above embodiment, the fuel gas supply amount G is exemplified based on the target temperature set by the user and the correspondence table held internally by the control unit. It is only an example. As another embodiment, it is good also as a structure determined based on target temperature and predetermined numerical formula. Alternatively, the control unit may be configured to increase or decrease the fuel gas supply amount G by comparing the target temperature set by the user with the hot water temperature measured by a thermometer provided upstream of the hot water tap. .

(3) In the above-described embodiment, the configuration in which the control unit switches between the first operation state and the second operation state based on the measurement result of the measurement device (whether or not power is supplied from the external AC power supply) is illustrated. The configuration is merely an example. As another embodiment, the operation state is changed between the first operation state and the second operation state based on a switch command from the outside without being controlled by the control control by the control unit or in parallel with the switch control by the control unit. It is good also as a structure provided with the switching means to switch.
For example, the switching unit may include a power source switch in the remote controller 3 and switch between the first operating state and the second operating state based on the switching of the power source switch. Or it is good also as a structure which is equipped with the power supply switch which switches a power supply separately from the remote control apparatus 3, and switches a 1st operation state and a 2nd operation state by switching the said power supply switch.
With such a configuration, the user commands switching from the switching means without depending on the power supply state from the external AC power source or in parallel with the power source switching control based on the power supply state from the external AC power source. Thereby, the gas heat source machine 1 which can switch an operation state (power supply) flexibly can be provided.

(4) In the above embodiment, in the power saving mode, the configuration in which the power consumption is suppressed by suppressing the blower fan rotation speed N is shown. However, as another embodiment, the power consumption is suppressed by suppressing the blower fan rotation speed N. In addition, the power consumption may be suppressed by limiting the display of the remote control device 3 or reducing the luminance of the remote control device 3. Moreover, it is good also as a structure which combines these. Furthermore, as a configuration in which the suppression of power consumption by these is controlled in combination as appropriate so that a predetermined amount of power consumption can be suppressed based on the amount of power supplied from the auxiliary power source (battery 9 in the above embodiment). Also good.

(5) In the above embodiment, when the supply voltage from the auxiliary power source drops below a predetermined value in the second operating state, the warning is displayed on the remote control device 3 and the hot water supply amount is limited by the water amount servo 24 to the user. Although the configuration for notifying that the battery 9 is out of capacity is illustrated, the configuration is merely an example. As another embodiment, a configuration may be adopted in which the user is notified by either a warning display on the remote control device 3 or a hot water supply amount restriction by the water amount servo 24.

(6) In the above embodiment, the blower fan rotational speed N is set at the point where the blower fan rotational speed becomes the minimum value in the input lines g1, g2, g3, g4 of each combustion stage (the fuel gas supply amount is G ₁ , G _In Example 3 set to ₂ , G ₃ , and G ₄ ), mention is made of a configuration that stabilizes the hot water temperature by fixing the number of combustion stages until the hot water tap is closed to avoid a rapid change in heating capacity. However, the said structure is only an example and it is applicable also to the gas heat source machine of another structure provided with the gas burner which can implement | achieve a some combustion stage.
For example, the first embodiment in which the range in which the blower fan rotation speed N is kept below the upper limit value Ne is set as the power saving input region, and the minimum value of the blower fan rotation speed N in the input lines g1, g2, g3, g4 of each combustion stage Therefore, the configuration can also be applied to the second embodiment in which the predetermined allowable range α for each combustion stage is set as the power saving input region.

1 Gas heat source machine 2 Heat source machine body 5 Connection terminal (auxiliary power receiving means)
8 External AC power supply 9 Auxiliary power supply (battery)
10 Combustion control unit (auxiliary power receiving detection means)
11 Combustion unit 12, 12X, 12Y Heat exchanger 13, 13X, 13Y Gas burner 14, 14X, 14Y

Claims (6)

A blower fan that supplies a combustion unit including a gas burner with a combustion oxygen-containing gas necessary for combustion of fuel gas supplied from the gas burner;
A heat exchanger that generates hot water by heating the feed water flowing in the hot water pipe with the heat of the fuel gas generated from the combustion section, and
Corresponding to the required hot water supply amount and hot water supply temperature, the amount of fuel gas supplied to the combustion section and the rotational speed of the blower fan that determines the amount of oxygen-containing gas for combustion required for combustion of the fuel gas A combustion control unit that controls the amount of fuel gas supplied to the combustion unit and the rotational speed of the blower fan based on an input relationship index that is a relationship;
In a gas heat source machine that normally receives all the power required for operation from an external AC power supply and operates hot water supply,
The amount of water supplied through the hot water pipe is configured to be increased or decreased by a water amount servo provided in the hot water pipe,
Auxiliary power receiving means capable of receiving power from an auxiliary power source capable of supplying limited power in an interrupted state where power supply from the external AC power supply is cut off, and an auxiliary power source receiving power from the auxiliary power receiving means Auxiliary power receiving detection means for detecting the power receiving state is provided,
In the auxiliary power receiving state, the combustion control unit, wherein satisfies the input relationship index, and in the blowing fan according to the power-saving input area where power consumption is set to less Kunar so, to controlling the combustion in the combustion portion ,
In the power saving mode in which the combustion control unit controls the combustion of the combustion unit within the power saving input region, the combustion control unit performs control based on the input relation index corresponding to the required hot water supply amount and hot water supply temperature. When the fuel gas supply amount and the rotation speed of the blower fan become the fuel gas supply amount and the rotation number of the blower fan outside the power saving input region, and the required hot water supply amount and hot water supply temperature cannot be realized, The fuel gas supply amount and the rotation speed of the blower fan are set as the predetermined fuel gas supply amount and the rotation number of the blower fan corresponding to the predetermined fuel gas supply amount in the power saving input region, and the hot water supply water A gas heat source unit configured to increase or decrease the amount of water supplied through a pipe by the water amount servo to achieve the required hot water supply temperature. In the power saving input area, in the input relation indicator, from the lowest power consumption index point where the power consumption is the lowest value to the upper limit power consumption index point which is the upper limit value of power consumption set based on a predetermined standard The gas heat source machine according to claim 1, wherein the gas heat source machine is an area within the range. The power saving input area is a range from the lowest power consumption index point at which power consumption is the lowest value in the input-related index to an allowable maximum power consumption index point that is higher than the minimum power consumption index point by a predetermined allowable power consumption amount. The gas heat source machine according to claim 1, wherein the gas heat source machine is an area within the range. The gas heat source unit according to claim 1, wherein the combustion control unit controls combustion of the combustion unit at a minimum power consumption index point at which power consumption is a minimum value in the input relation index. The gas burner includes a plurality of burner portions capable of individually supplying and shutting off fuel gas, and increasing or decreasing the number of burner portions for supplying fuel gas according to the amount of hot water supply, thereby providing a plurality of combustion stages. Configured to be feasible,
In each combustion stage, the input-related indicator is set,
The gas heat source machine according to any one of claims 1 to 4, wherein a power saving input area is set as the power saving input area for each input relation index of each combustion stage. The gas burner includes a plurality of burner portions capable of individually supplying and shutting off fuel gas, and increasing or decreasing the number of burner portions for supplying fuel gas according to the amount of hot water supply, thereby providing a plurality of combustion stages. Configured to be feasible,
In each combustion stage, the input-related indicator is set,
The gas heat source machine according to claim 4, wherein the combustion control unit controls the combustion of the combustion unit at any one of the lowest power consumption index points where the power consumption is the lowest value in the input relation index of each combustion stage.

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