JP3128059B2 - Combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus using gas or kerosene as fuel.

[0002]

2. Description of the Related Art Conventionally, in a household gas water heater as a combustion device using gas, kerosene or the like as a fuel, its life is determined by thermal stress caused by repeated ignition and extinguishing and the operating time. Therefore, the calculation of the service life at the time of design development assumes the number of times of use and the use time per day, and the use for about 10 years is considered. Therefore, the product has been subjected to confirmation experiments on the premise of this number of uses and has been offered to the market.

By the way, when such a household gas water heater is used for business use, its use time greatly increases from the number of times of use at home, and exceeds the expected number of times of use or time of use at home. Will be lost. In some cases, more than 10 times the expected number of hours or time would be used, causing perforations in the heat exchanger drum, which could cause exhaust gas leaks, overheating the backing, burning the walls, and causing fires. There is a risk of reaching.

[0004] In particular, the gas water heater has been reduced in size and increased in calories hastened the end of its life, and the space between the gas water heater and the mounting wall has been narrowed. The incidence rate is high.

Accordingly, an object of the present invention is to provide a combustion apparatus which realizes a highly reliable control operation suitable for such service life monitoring and the like.

[0006]

As shown in FIGS. 1 to 3, a combustion apparatus according to the present invention burns supplied fuel.
Combustion means (burner 10), first storage means (ROM 362, RAM 364) for storing a program used for combustion control of the combustion means and data in the course of calculation;
Apart from this first storage means, an E ² PROM (363)
It is configured to store the data to be referred to the combustion control, power failure, and a second storage means for holding the stored contents (E ² PROM363), combustion initiation of the combustion unit
From the end of combustion to the end of combustion
The number is stored in the first storage means, and
Add the number of times of accumulation stored in the second storage means and add
The number of times of accumulation in the second storage means is updated, and the number of times of accumulation is updated.
When the usage limit is exceeded, ignition of the combustion means is prohibited.
Rutotomoni, the control means (CPU for generating a life end signal
361) and the life reaching signal generated by the control means.
Display means (display 40) for further displaying an alarm.
It is characterized by .

[0007] combustion equipment, and repeat the ignition and extinguishing retardant
The fuel is burned, and the number of times of ignition corresponds to the number of times of use. By counting the number of times of use, the end of the life of the combustion equipment can be known from whether or not the integrated value has reached the use limit value. The integrated value data of the number of uses is
Unlike the ever-changing data on the combustion control operation, in the life monitoring of combustion equipment, it is updated at long time intervals,
It is necessary to accumulate. Therefore, separately from the first storage means used for combustion control, a second storage means is provided.
E ²
In addition to using a PROM, the second storage means is provided to realize storage and update of necessary data. Such installation of the second storage means can reduce the load on the combustion control by the first storage means and realize reliable control.

Further, the combustion equipment of the present invention is shown in FIGS.
Combustion means for burning supplied fuel as exemplified
(Burner 10) and the burner 10
The first storage for storing programs and data in the process
Storage means (ROM 362, RAM 364) and this first
It is composed of E ² PROM (363) separately from the storage means
Store data referred to the combustion control, at the time of power failure,
Second storage means that holds the stored contents (E ² PROM
363), from the start of combustion of the combustion means to the end of combustion.
Is accumulated and stored in the first storage means.
The second storage means stores the accumulated time.
Add to the accumulated time to update the accumulated time in the second storage means.
When the accumulated time exceeds the usage limit,
Prohibits ignition of baking means and generates end-of-life signal
Control means (CPU 361) for performing
Display means for displaying an alarm based on the life reaching signal
(Display 40).

With such a structure, the combustion machine
The igniter burns fuel by repeating ignition and extinguishing.
The time from ignition to extinction is the usage time.
Accumulate the usage time of. That is, when used for the first storage means
And accumulates the time, and stores the accumulated time in a second storage means.
Update the integration time of the second storage means by adding to the integration time of
When the accumulated time exceeds the usage limit, the combustion means
Is prohibited and the alarm
Display. As a result, we know the end of the life of combustion equipment
be able to.

In the combustion apparatus of the present invention,
The combustion means burns gas or kerosene or other fuel
Characterized in that: Heating source by burning fuel
The life of the combustion equipment is monitored.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the combustion equipment of the present invention. The combustion equipment is a gas water heater 2 for burning fuel supplied, the gas G is used as a fuel to the gas water heater 2. Gas G is supplied to gas solenoid valves 4 and 6
And a burner 10 as combustion means through a proportional valve 8. The burner 10 is provided with an igniter 12 as an ignition means, and a flame rod sensor 14 as a flame detection sensor for confirming combustion of the burner 10. In the frame rod sensor 14, a detection signal representing the flame is obtained in accordance with the detection of the flame. Further, a fan 16 is installed in the burner 10 as a blower for promoting combustion of the gas G, and the fan 16 is driven by a fan motor 18. A wind pressure switch 20 is connected as means for detecting the rotation of the fan motor 18.

The gas water heater 2 includes a burner 1
A heat exchanger 22 is provided as means for heating the feed water by receiving heat generated by the heat exchanger 0. The heat exchanger 22 receives the feed water W from a water supply or the like, and passes through a filter 23 to a flowing water switch 24.
As a result, the water supply W is electrically detected. Heat exchanger 2
The hot water HW obtained by the heat exchange by 2 is used for baths, kitchens, etc.
Hot water is supplied where necessary.

A water supply pipe 26 from the water switch 24 of the gas water heater 2 to the heat exchanger 22 is provided with detection means for preventing gas combustion when the water supply W is not supplied, that is, as a sensor for preventing dry burning. A high limit sensor 28 is provided. A temperature sensor 3 for electrically detecting the temperature of the hot water HW is provided on the hot water supply pipe 30 on the hot water supply side of the heat exchanger 22.
2 are installed. The temperature sensor 32 is constituted by a thermistor or the like, and a detection signal is obtained. Further, the heat exchanger 22 is provided with a temperature fuse 34 as a means for preventing a fire due to abnormal overheating.

The gas water heater 2 is provided with a hot water supply control unit 36 which constitutes a control device serving as a life monitoring means. The hot water supply control unit 36 has a frame rod sensor 14, a wind pressure switch 20, various detection signals m ₁ , m ₂ , m _3, ... _Mn from the running water switch 24, the high limit sensor 28, the temperature sensor 32, etc. The hot water supply control unit 36 executes the predetermined hot water supply control program and the life monitoring program to execute each detection signal m ₁ , m ₂ ,
m ₃ ··· m _n and the control input signal V _C1, V _C2 ··· V _Cn
In response, the control output signals V _O1 , V _O2, ..., V _On are taken out to control the gas solenoid valves 4, 6, the proportional valve 8, the igniter 12, the fan motor 18, and other actuators 38. . That is, in the life monitoring control, when the number of uses of the gas water heater 2 has reached a predetermined number of times, it prohibits the operation of the combustion prohibition and reused by the life end signal V _X is performed. At the same time, the life end signal V _X, is applied to the display 40 is a display means for visually or aurally indicate whether life burning appliance has arrived. Display 40
Visually or aurally for displaying whether life gas water heater 2 has come on the basis of the life end signal V _X.
Therefore, the display device 40 is configured by a visual display device that displays characters and symbols, or an alarm device that generates an alarm sound.

Next, FIG. 2 shows a specific configuration of the hot water supply control unit 36, a relationship between the hot water supply control unit 36 and various sensors, and a relationship between the hot water supply control unit 36 and an object to be controlled. That is, the hot water supply control unit 36 is read out as a central processing unit (CPU) 361 as a central control unit serving as a central control unit of the hot water supply control unit 36, a combustion control program, a life monitoring program, and other first storage means for storing other fixed data. ROM362 as dedicated memory, arithmetic developing the RAM364 as a random access memory for storing data and the like, for memory backup as a second storage means for separately storing the accumulated data from these first serial <br/>憶means E ² PROM as occasional write memory
363 are installed, and these are linked by a common bus 365 to exchange necessary data.

The hot water supply controller 36 is provided with a filter (FIL) 366 as an interface. Frame rod sensor 14, wind pressure switch 20,
Various detection signals m ₁ , m ₂ , m ₃ ... _Mn from the flowing water switch 24, the high limit sensor 28, the temperature sensor 32, etc.
After being taken in through this filter 366 to remove unnecessary noise components, a multiplexer (MPX) 36
7 and are converted into digital signals by an analog-to-digital converter (ADC) 368 and then input to a bus 365.

Further, an input / output interface (I / O) 369 is installed in the hot water supply control unit 36. This I / O 369 has a control input signal V necessary for combustion control.
_C1, V _C2 together · · · V _Cn are added, the result of the combustion control and supervisory control, the control output signal V _O1, V _O2 ··· V _On
Is output. That is, the control output signals V _O1 , V _O2 ... V _On are applied to the gas solenoid valves 4 and 6, the proportional valve 8, the igniter 12, the fan motor 18 and other actuators 38, and necessary operations are performed. That is, in the life monitoring control, the combustion operation is prohibited by completely or selectively prohibiting these operations, and re-ignition, that is, reuse is prohibited. Then, the life end signal V _X is applied to a display device 40 to display the life arrival of equipment.

In the above configuration, the combustion control and life monitoring operation will be described with reference to the combustion control program and life monitoring program shown in FIG. When the power is turned on, each element and circuit are initialized, and the operation of this program is started periodically. In step S1, running water is detected. The flowing water detection is made by flowing water switch 24, the presence or absence of running water is detected by the detection signal m _3.

Next, in step S2, the rotation of the fan 16 is detected, and in step S3, the operation of the igniter 12 is detected. Next, in step S4, the gas valve is opened, that is, the opening operation of the gas solenoid valves 4, 6 and the proportional valve 8 is performed.
Next, in step S5, the ignition operation is performed by the igniter 12, and the burner 10 burns the gas G.
As a result, hot water is supplied.

Next, when the water supply is stopped, step S is executed.
At 6 the stop of the water supply is detected. In response to this water supply stop, the gas valve is closed in step S7. Next, in step S8, the rotation of the fan 16 is stopped, and as a result, hot water supply is stopped.

The series of operations from the start of hot water supply to the stop of hot water supply represents a unit of single use of the gas water heater 2. The number of times of use is stored in the E ² PROM 363. In step S9, the number of times of use N, which is an accumulated value, is read from the E ² PROM 363. In step S10, the number of times of use is added to the number of times of use N. The number of times of use as the integrated value is ΣN.

Next, in step S11, the number of uses ΔN is set as the life, that is, N which is set as the use limit value.
m to determine whether ΔN ≦ Nm. ΣN = N
m, the process proceeds to step S12,
CPU361 generates a life end signal V _X representing the life end in performs disabled gas water heater 2, the prohibition of the alarm display and reuse.

If it is determined in step S11 that ΣN <Nm, the process proceeds to step S13, and the number of uses ΣN is stored again in the E ² PROM 363 as an added value. That is, by adding the number of times of use to the previous integrated value, the integrated value stored in the E ² PROM 363 is updated, the program operation ends, and the process stands by. As a result,
The number of times the gas water heater 2 is used is kept below the usage limit,
The danger due to overuse can be avoided, and an accident such as a fire can be prevented.

By the way, in this embodiment, E ² PR
OM363 is used. This is E
² Reads the internal data of the PROM 363 and, for example,
By adding the number of times of use of the 1-2 days, again, E ² PROM36
By storing data indicating the number of uses in 3,
This prevents data loss due to a power failure. As a result, highly reliable life monitoring can be realized.

In the above embodiment, the service life is monitored by counting the number of times of use. However, the energizing time and hot water supply time indicating the use time are counted, that is, the limit use time indicating the service life is compared by the time measurement. To monitor the life. Further, both the use time and the number of times of use may be monitored.

Further, in the above-described embodiment, the combustion equipment using gas as fuel has been described. However, the present invention can be similarly applied to a hot water supply apparatus using kerosene or other fuel.

[0028]

As described above, according to the present invention,
The following effects are obtained. a. Separately E ² PR from the first storage means to control the combustion equipment
A first storage unit using a second storage unit comprising an OM;
Using programs stored in the
In addition to realizing normal combustion control, combustion starts and ends.
The number of times in units of
The number of times of use is stored and the number of times of use is stored in the second
Add to the storage means and update the number of integrations in the second storage means
If the total number of times exceeds the usage limit,
Is prohibited and an alarm is displayed, so overuse
The danger caused by the
The storage means is protected from memory loss, so
A highly reliable control operation can be realized. Also, its control operation
Sometimes updates are needed and must be kept for a long time
Storing life monitoring data etc. in the second storage means
By maintaining the safety of combustion equipment,
The reliability of the device can be improved. b. Separately E ² PR from the first storage means to control the combustion equipment
A first storage unit using a second storage unit comprising an OM;
Using programs stored in the
In addition to realizing normal combustion control, combustion starts and ends.
To the end, that is, use time is accumulated and the first memory
And a second storage means for storing the usage time in the second row.
, The integrated time of the second storage means is updated, and the product
Prohibit use when the calculation time exceeds the usage limit
The alarm is displayed together with the alarm.
Can be avoided, and the second storage means is
Since the loss of memory is prevented, a highly reliable system
Control operation can be realized. Updates are required during the control operation.
Life monitoring data that must be maintained for a long time
By storing the data in the second storage means,
Equipment safety can be maintained and the reliability of combustion equipment
Can be increased. c. Increase safety of combustion equipment using fuel such as gas or kerosene
Can be

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a combustion device of the present invention.

FIG. 2 is a block diagram showing a specific configuration example of a combustion control unit of the combustion device shown in FIG.

FIG. 3 is a flowchart showing a combustion control program and a life monitoring program.

[Explanation of symbols]

2 Gas water heater (combustion equipment) 10 Burner (combustion means) 36 Hot water supply control section (control means) 361 CPU (control means) 362 ROM (first storage means) 363 E ² PROM (second storage means) 364 RAM (First storage means)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-45316 (JP, A) JP-A-4-62318 (JP, A) JP-A-62-2223524 (JP, A) 291414 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F23N 5/00, 5/24

Claims (3)

(57) [Claims] 1. Combustion means for burning supplied fuel
When a first storage means for storing programs and operation course of data used for combustion control of the combustion unit, and the first storage means is configured separately by E ² PROM with <br/> the combustion control To store the data to be referenced in the event of a power outage.
A second storage unit for storing the stored contents , and a unit of combustion from the start of combustion to the end of combustion of the combustion unit.
The number of times of combustion to be performed is integrated and stored in the first storage means.
And the number of times stored in the second storage means.
The number of times of accumulation is added to the number of times of accumulation in the second storage means.
Is updated, and when the total number of times exceeds the usage limit,
In addition to prohibiting ignition of the combustion means,
An alarm is generated by the control means generated and the life end signal generated by the control means.
A combustion device comprising: display means for performing display . 2. Combustion means for burning supplied fuel
And the programs and calculations used to control the combustion of this combustion means
A first storage means for storing intermediate data, and an E ² PROM separately from the first storage means
Store data referred to the combustion control, at the time of power failure,
A second storage unit for storing the stored contents, and a time period from the start of combustion to the end of combustion of the combustion unit is integrated.
And stores it in the first storage means.
The time is added to the accumulated time stored in the second storage means.
Update the accumulated time in the second storage means, and calculate the product
When the calculated time exceeds the usage limit, the ignition of the combustion means
Control means for prohibiting power generation and generating a life end signal
And an alarm by the end of life signal generated by the control means.
A combustion device comprising: display means for performing display . 3. The combustion means may be gas or kerosene, or other gas or kerosene.
Wherein the fuel is burned.
3. The combustion device according to 1 or 2.