JP3966690B2 - Combustion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combustion apparatus including a burner and a heat exchanger.
[0002]
[Prior art]
Since the dew condensation water generated from the latent heat recovery type combustion apparatus shows strong acidity, it is generally neutralized before drainage. However, the neutralization reaction is a chemical reaction, and the neutralizing agent is consumed with the reaction. Therefore, it is necessary to replace the neutralizing agent (replenishment or replacement of the neutralization tank itself as a unit). When operating the combustion device with the neutralizing agent consumed, there is a problem that strongly acidic condensed water is discharged without being neutralized. The technique made to do is provided conventionally.
[0003]
[Problems to be solved by the invention]
However, since the conventional method of notification is extremely simple that only performs notification when the time comes, there is a problem that the notification effect to the user is weak.
In addition, there is a problem in business water heaters and the like that there is a great business trouble, such as continuing to sound an alarm buzzer or stopping operation when the replacement time is reached. On the other hand, only the error display on the remote controller of the apparatus has a problem that the user can continue to use it without noticing enough. Furthermore, with specifications such as sounding a buzzer when the main operation switch such as a water heater is turned on or off, there are many users who use the main operation switch while it is turned on. There is.
[0004]
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a combustion apparatus that can eliminate the above-described drawbacks and can effectively inform the user about the replacement of the neutralizing agent and the like.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a combustion apparatus according to the present invention comprises a heat exchanger that exchanges heat until the combustion exhaust gas of a burner falls below a dew point, and neutralizes dew condensation water generated in the heat exchanger. A combustion apparatus having at least a neutralizing device provided with a neutralizing agent, wherein the burner combustion accumulated time becomes a predetermined standard combustion integrated time or a predetermined standard combustion with a predetermined cumulative combustion number The time point at which the accumulated number is reached is the reference point T _s of the neutralizing agent required replacement point, and the constant combustion integration time or the point before the combustion integrated number point from the replacement reference point of time T _s is set as the forecast notification start point T _p , the above and main exchange reference time T _s constant firing integration time or when a broadcast end time T _f after only combustion cumulative scale number than, said from forecast known start time T _p until main exchange reference time T _s, essential replace the reference point in time T _s is closer Performs forecast knowledge you can determine that has, from the main exchange reference time T _s to broadcast end time T _f performs main exchange notification and stops the combustion operation functions with a course of informing end T _f device further comprising a controller which is adapted to have a first feature.
Further, in addition to the first feature, the combustion apparatus of the present invention, when reaching the notification end time _Tf , the final notification that the function of the combustion operation is stopped or that this is the last notification of the replacement notification is required. The second feature is that after the operation is performed, the combustion operation function is stopped, and an error display including a display indicating a failure of the neutralizing device or a display indicating the life of the neutralizing agent is performed .
In addition to the first or second feature described above, the combustion device of the present invention has a third feature that the forecast notification and replacement notification are performed during operation of the device .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall configuration diagram showing an embodiment in which the combustion apparatus of the present invention is used in a hot water supply apparatus, and FIG. 2 is a flowchart showing a control form by a controller.
[0007]
First, in FIG. 1, reference numeral 10 denotes a combustion can body. A gas burner 11 is provided in the combustion can body 10 and burns by receiving supply of fuel gas from the gas supply means 20 and blowing from the blower fan 30.
12 is an ignition rod, 13 is a combustion flame temperature sensor, and 14 is a extinguishing safety device. Further, 21 is an original gas solenoid valve, 22 is a gas proportional valve, and 31 is a rotational speed sensor of the blower fan 30.
[0008]
Water from a water source such as a water supply is discharged from a water supply circuit 40 through a water inlet 41 to a hot water outlet 44 via a second heat exchanger 42 and a first heat exchanger 43. 45 is a bypass.
The hot water supply circuit 40 includes an incoming water flow sensor 51, an incoming water temperature sensor 52, an afterfire safety device 53, an outgoing hot water flow controller 54, an outgoing hot water temperature sensor 55, a mixing device 56, a hot water supply temperature sensor 57, a bypass flow sensor 58, and a bypass flow rate adjustment. A container 59 is provided.
[0009]
The second heat exchanger 42 is provided in the combustion can body 10 at a position farther from the burner 11 than the first heat exchanger 43. 46 is a drain plug and 47 is a heating prevention device.
The combustion gas generated by the combustion in the burner 11 rises, and first heats the first heat exchanger 43 to heat and heat the water passing through the inside. As a result, the temperature of the combustion gas is considerably reduced, but further reaches the second heat exchanger 42 and gives heat to the second heat exchanger 42. For this reason, the temperature of the combustion gas is lowered below its dew point, and latent heat is given to the second heat exchanger 42. Condensed water is generated in the vicinity of the second heat exchanger 42 as the temperature of the combustion gas falls below the dew point.
A dew condensation water receiver 61 receives the dew condensation water generated in the second heat exchanger 42 and the like, and guides the dew condensation water through the dew condensation water passage 62 to a neutralizer 63 composed of a neutralizer and a neutralizer. It is configured. At least a neutralizing agent is provided in the neutralizing device 63, and the condensed water is neutralized by the neutralizing agent. The neutralized dew condensation water is discharged from the neutralizer 63 to the outside.
Since the effect of the neutralizing agent decreases with time, it is necessary to exchange the neutralizing agent (including the case where the neutralizing tank itself is replaced) at a certain point in time.
[0010]
70 is a controller of the apparatus, and 71 is a remote controller. The controller 70 inputs a command from the remote controller 71 and information from sensors in each part of the apparatus, makes a determination according to the built-in control software, and performs a predetermined control command and other communication outputs to each part of the apparatus.
An instruction to replace the neutralizing agent in the neutralizing device 63 is also notified to the user by the controller 70 via the remote controller 71 or the like.
Reference numeral 72 denotes an ambient temperature sensor.
[0011]
With reference to the flowchart of FIG. 2, the control form of the neutralization agent replacement notification by the controller 70 will be described.
Now, when the burner 11 is ignited and the combustion operation is in progress (Yes in Step S1), the controller 70 calculates the burn integration time ST of the burner 11 each time (Step S2).
Then the combustion accumulation time ST and reaches the forecast knowledge start combustion cumulative time ST _p (Yes in step S3), and an error message is displayed on the remote controller 71 or the like with (step S4), and starts the forecast knowledge of a main exchange neutralizing agent (Step S5). This prediction is performed every time a predetermined combustion integration time is integrated until the combustion integration time ST reaches the required reference combustion integration time ST _s (Yes in step S6).
[0012]
The required reference combustion integration time STs is determined in advance by an experiment in relation to the amount of the neutralizing agent of the neutralizing device 63, and is stored in the storage unit of the controller 70. This required replacement standard combustion integration time ST _s can be set to, for example, 3000 hours.
In the present invention, the time point when the required replacement reference combustion integration time ST _s is reached is set as the required reference time point T _s .
Then, with respect to the required reference combustion integration time ST _s , a predetermined integration time determined in advance by experiment, for example, a combustion integration time before 100 hours is set as a forecast knowledge start combustion integration time ST _p (for example, 2900 for the 3000 hours). Time).
In the present invention, the time to reach the forecast knowledge start combustion cumulative time STp and forecast knowledge beginning T _p.
[0013]
The forecast and intellectual start combustion accumulated time reaches ST _p (Yes in step S3), and an error message is displayed (step S4) is, at this time, instead of actually displaying the so-called error, using means that error display It is preferable to display a level such as "Neutralizing agent may be replaced soon".
Upon reaching the forecast knowledge start combustion cumulative time ST _p, first performs a first round of forecasting knowledge, then, until reaching the main replacement standard combustion cumulative time ST _s, the forecast knowledge each time a predetermined cumulative time has elapsed repeat.
For example, the forecasting notification sounds a buzzer of 5 seconds when the combustion integration time is 10 hours at the beginning, and a buzzer of 10 seconds when the combustion integration time is 5 hours. of the buzzer 15 seconds every 2 hours, it is possible to make the buzzer 20 seconds every 1 hour and the combustion cumulative time becomes the close of a main exchange reference combustion cumulative time ST _s. Of course, the buzzer length may be gradually increased without changing the prediction interval.
The buzzer may be changed in tone. Instead of the buzzer, the tone and melody of the chime may be changed to one that gradually increases urgency.
Further, the notification may be made by voice so that the content of the words by the voice gradually changes to a more urgent one. Further, at first, the meaning such as buzzer or chime is not necessarily understood, and it may be changed from the middle to a notification regarding a specific exchange required by voice.
As described above, in the prediction knowledge of step S5, the user is approaching the replacement required reference time T _s (required replacement reference combustion accumulated time ST _s ) while changing the prediction notification interval and the content of the prediction notification. Let them know.
[0014]
When the accumulated time reaches the replacement-required reference combustion accumulated time ST _s (Yes in Step S6), the controller 70 displays an error again (Step S7) and notifies the neutralizer necessary replacement (Step S8). . Notification of a main exchange (step S8) is set to reach the broadcast ends combustion cumulative time ST _f.
Notifying completion combustion accumulation time ST _f is thus to be stored in the storage unit of the controller 70 determined by experiment, for example, a fixed integration time to main replacement standard combustion cumulative time ST _s, plus for example only 100 hours burning it can be integrated time (e.g. 3100 hours against 3000 hours of the main replacement standard combustion cumulative time ST _s).
In the present invention, the time to reach the notification completion combustion cumulative time ST _f a broadcast end time T _f.
[0015]
The error display in step S7 can be an error display different from the error display in step S4. For example, an error display specifically indicating that the neutralizing agent has not been exchanged is used.
The notification of a main exchange performed by main replacement standard combustion accumulated time reaches ST _s (step S8) may, until the accumulated time reaches the broadcast ends combustion cumulative time ST _f, a notification each time a predetermined cumulative time has elapsed repeat.
This replacement notification (step S8), for example, sounds a buzzer of 20 seconds when the accumulated combustion time is 1 hour at the beginning, and sounds a buzzer of 25 seconds when the accumulated combustion time is 1 hour. Further, the notification interval can be gradually shortened or the length of the buzzer can be lengthened so that a buzzer of 25 seconds is obtained every 30 minutes of accumulated combustion time.
Of course, a chime may be used instead of a buzzer, and the timbre and melody may be changed to those that become more urgent over time. However, notification by voice is more preferable. And it is preferable that the content of the words by the sound gradually changes to a highly urgent one.
As described above, in the notification of the replacement required in step S8, the user is informed of the necessity of replacement of the neutralizing agent and arranged for replacement while changing the notification interval and the content of the notification. To do.
[0016]
Upon reaching the broadcast ends combustion cumulative time ST _f at the step S9, the controller 70 is conducted that the stop function of the combustion operation, or this is the last notification to the effect such as the last notification of a main exchange informs (step S10) Thereafter, the combustion operation function is stopped (step S11). Further, error display is performed (step S12). The error display can be, for example, a display indicating a failure of the neutralizing device 63, or it can mean the life of the neutralizing agent.
[0017]
In the embodiment according to the flow of FIG. 2 described above, the combustion integration time needs to be changed when reaching the required reference combustion integration time ST _s , the forecast notification start combustion integration time ST _p , and the notification end combustion integration time ST _f. Although the reference time T _s , the forecast notification start time T _p , and the notification end time T _f are used, the combustion integrated number SG may be used instead of the combustion integrated time ST.
That is, during the combustion operation, the controller 70 calculates the combustion integration number SG instead of calculating the combustion integration time ST in step S2 of FIG.
In step S3, instead of determining whether reached forecast knowledge start combustion cumulative time ST _p, it is determined whether the combustion cumulative scale number SG reaches the forecast knowledge start burning the accumulated scale number SG _p, forecast Intellectual the time to reach the start of combustion integration issue number SG _p and forecast knowledge start time T _p.
Further, in step S6, instead of determining whether or not the required reference combustion integration time ST _s is reached, it is determined whether or not the combustion integration number SG reaches the required replacement combustion integration number SG _s. The point in time at which the reference combustion cumulative number SG _s is reached is defined as the reference point of reference T _s that needs replacement.
In step S9, instead of determining whether reached notification completion combustion cumulative time ST _f, combustion integrated scale number SG is determined whether it reaches the broadcast ends combustion cumulative scale number SG _f, informing completion combustion cumulative The time point at which the number SG _f is reached is designated as the notification end time point T _f .
Steps other than the above-described steps S2, 3, 6, and 9 are the same as the control operation shown in FIG.
[0018]
The required reference combustion cumulative number SG _s is determined in advance by an experiment in relation to the amount of the neutralizing agent of the neutralizing device 63 and stored in the storage unit of the controller 70.
Then, with respect to the required reference combustion accumulation number SG _s , the combustion accumulation number before the constant accumulation number determined in advance by experiment is set as the forecast knowledge start combustion accumulation number SG _p .
In addition, the combustion integrated number after a predetermined integrated number determined in advance by experiment with respect to the replacement reference combustion integrated number SG _{s is} set as the notification end combustion integrated number SG _f and stored in the controller 70.
The combustion number is the amount of combustion heat, and number 1 is the amount of heat that can raise 1 liter of water by 25 ° C. per minute. Since the consumption of the neutralizing agent is proportional to the amount of condensed water, and the amount of condensed water is roughly proportional to the amount of heat of combustion, it is possible to relatively accurately correspond to the time of replacement of the neutralizing agent by using the accumulated combustion number. it can.
[0020]
In the above description, if the reference required time point T _s , the prediction notification start time point T _p , and the notification end time point T _f are the time itself, the time point at which the notification is required is not necessarily during the combustion operation of the combustion device. Therefore, there is a possibility that there is no one who hears the notification, such as notification being made at night, or the notification may be annoying.
Therefore, in the present invention, when the time point at which notification is required, such as the reference required time point T _s , the prediction notification start time T _p , and the notification end time T _f , reaches a time other than during the combustion operation, the combustion is performed next. The system is configured to notify when the operation is started. In the controller 70, it is determined whether or not the combustion operation is performed. If not, the necessary notification may be delayed until the next combustion.
By performing the notification during the combustion operation, it is avoided that the buzzer sounds during the night when the device is not used, and the main operation switch of the hot water supply device is kept on (the combustion operation is performed). It is possible to effectively notify even on-site.
[0021]
When the above-described combustion integration time ST and combustion integration number SG are used to determine the required replacement reference time T _s , forecast notification start time T _p , and notification end time T _f , this is always the case during combustion operation. Since the notification time is reached, it is prevented that the notification is performed when the combustion operation is not performed such as at night, and the notification is made in a situation where it is clear that no one hears the notification, or the notification is annoying It is possible to surely prevent inconveniences such as being notified in such a situation, and to expect notification in a situation where there is a high possibility that the user or the administrator is nearby.
[0022]
【The invention's effect】
The present invention has the above-described configuration and operation. According to the combustion apparatus of claim 1, the heat exchanger is configured to exchange heat until the combustion exhaust gas of the burner falls below the dew point, and is generated by the heat exchanger. A combustion apparatus having at least a neutralizing device provided with a neutralizing agent for neutralizing the condensed dew water, wherein the burner combustion accumulated time becomes a predetermined reference combustion accumulated time or a combustion accumulated number point number as a main exchange reference time T _s of a predetermined fixed reference combustion cumulative scale number to become time a neutralizing agent, for a certain combustion cumulative time or combustion cumulative scale number than main exchange reference time T _s in front of the Is set as the forecast notification start time T _p, and a time after a certain cumulative combustion time or number of the cumulative combustion number from the exchange required reference time T _s is set as the notification end time T _f, and is required from the forecast notification start time T _p. Required until the exchange reference point T _s A forecast notification is made so that it can be determined that the exchange reference time T _s is approaching, exchange notification is required from the exchange required reference time T _s to the notification end time T _f , and the notification end time T _f has passed. Because it has a controller that stops the combustion operation function of the device ,
The user can be effectively notified about the exchange of the neutralizing agent and the like.
Particularly for main exchange reference time T _s, forecast knowledge it than from the previous forecast known start time T _p until main exchange reference time T _s, which is to be determined that the main exchange reference time T _s is approaching , And a required replacement notification is performed from the reference required time point T _s to the notification end time T _f, and the combustion operation function of the apparatus can be stopped after the notification end time T _f elapses. Therefore, it is possible for the user or administrator to know the time for replacement of the neutralizing agent reliably by forecasting , and the neutralizing tank or neutralizing device containing the neutralizing agent replacement or neutralizing agent at an appropriate time. Can be exchanged. In addition, the replacement required notification allows the user and the administrator to receive notification of the replacement of the neutralizing agent even after the required replacement reference time T _s and after that. Further, when the notification end time _Tf has passed, the combustion operation function of the apparatus is stopped, so that maintenance can be forcibly urged.
If the time point at which the burner combustion integration time becomes a predetermined reference combustion integration time is defined as the neutralization agent replacement reference time point T _s , neutralization is performed with a measure highly correlated with neutralizer consumption. It becomes possible to know the replacement time of the agent. Further , if the time point at which the combustion cumulative number becomes a predetermined standard combustion cumulative number is defined as the neutralizing agent replacement reference time point T _s , a medium with a high degree of accuracy coincides with the neutralizer consumption. It will be possible to know when to replace the powder.
Further, according to the combustion apparatus of the second aspect, after reaching the notification end time _Tf , after giving the final notification that the function of the combustion operation is stopped or that this is the final notification of the replacement notification required. Since the combustion operation function was stopped, an error display consisting of a display indicating a failure of the neutralizing device or a display indicating the life of the neutralizing agent was performed .
When the user or manager reaches the notification end time _Tf and the combustion operation function of the device is stopped , the user or the administrator stops the function of the combustion operation of the device before that or this is the last notification of the replacement notification required. It is possible to obtain a final notification such as that. When the function of the combustion operation of the apparatus is actually stopped, an error display consisting of a display indicating a failure of the neutralizing device or a display indicating the life of the neutralizing agent can be obtained.
Further, according to the combustion device of claim 3, in addition to the effect of the configuration of claim 1 or 2, since the forecast notification and the notification of replacement required are performed during operation of the device,
It is possible to prevent inconveniences such as notifications made when there is no user or administrator nearby, or a buzzer sounding at night or the like, or noise. It can be left without fail in a situation where there is a high possibility of being in the area .
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an embodiment in which a combustion apparatus of the present invention is used in a hot water supply apparatus.
FIG. 2 is a flowchart showing a control form by a controller.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Combustion can 11 Gas burner 20 Gas supply means 30 Blower fan 40 Hot water supply circuit 42 2nd heat exchanger 43 1st heat exchanger 61 Condensed water receiving device 62 Condensed water passage 63 Neutralizing device 70 Controller 71 Remote control

Claims (3)

Combustion having at least a heat exchanger that exchanges heat until the combustion exhaust gas of the burner falls below the dew point, and a neutralizing device provided with a neutralizing agent for neutralizing the dew condensation water generated in the heat exchanger A device,
The time point at which the burner combustion integration time becomes a predetermined reference combustion integration time or the time point at which the combustion integration number becomes a predetermined reference combustion integration number is set as the neutralizer-required reference time point T _s ,
The time of the front for a certain combustion cumulative time or combustion cumulative scale number than main exchange reference time T _s as the forecast knowledge start time T _p, also constant firing integration time or combustion cumulative No. than the main exchange reference time T _s The time point after the number is set as the notification end time T _f ,
The forecast from known starting point T _p until main exchange reference time T _s, performs forecast knowledge you can determine that the main exchange reference time T _s is approaching, the notification end point T from main exchange reference time T _s Until _f, notification is required,
A combustion apparatus comprising a controller configured to stop the combustion operation function of the apparatus with the elapse of notification end time _Tf . When the notification end time _Tf is reached, the combustion operation function is stopped after the final notification that the function of the combustion operation is stopped or that this is the last notification of the replacement notification is necessary, and the neutralization device malfunctions. The combustion apparatus according to claim 1, wherein an error display including a display indicating the above or a display indicating the life of the neutralizing agent is performed . The combustion apparatus according to claim 1 or 2, wherein the prediction and replacement notification are performed during operation of the apparatus.

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