CN1159852A - Combustion equipment for judging abnormality or life - Google Patents

Combustion equipment for judging abnormality or life Download PDF

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Publication number
CN1159852A
CN1159852A CN95195515A CN95195515A CN1159852A CN 1159852 A CN1159852 A CN 1159852A CN 95195515 A CN95195515 A CN 95195515A CN 95195515 A CN95195515 A CN 95195515A CN 1159852 A CN1159852 A CN 1159852A
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CN
China
Prior art keywords
mentioned
air
combustion
mass flow
rotating speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN95195515A
Other languages
Chinese (zh)
Inventor
榎本正德
富永直人
近藤正登
藤本龙雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gastar Co Ltd
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Gastar Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP23073294A external-priority patent/JP3566757B2/en
Priority claimed from JP24956594A external-priority patent/JP3566758B2/en
Priority claimed from JP28440394A external-priority patent/JP3566765B2/en
Application filed by Gastar Co Ltd filed Critical Gastar Co Ltd
Publication of CN1159852A publication Critical patent/CN1159852A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/08—Microprocessor; Microcomputer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F23N2227/16—Checking components, e.g. electronic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/26—Fail safe for clogging air inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

Disclosed is a combustion appliance, which comprises: a burner; a combustion fan for supplying air to, and exhausting air from the burner; an air-flow rate sensor for detecting an air-flow rate along an air flow route from an air supply path to an air exhaust path for the burner; and a controller for storing a reference air-flow rate for determining whether an abnormality or expiration of a lifetime has occurred when the combustion fan is rotated at a predetermined revolution rate, for determining there is no wind condition when a change in the air-flow rate, which is detected by the air-flow rate sensor when there are no revolutions or a specified number of revolutions by the combustion fan, is within a predetermined permissible range, and for determining an abnormality or an expiration of a lifetime has occurred when no wind condition is detected and when the air-flow rate, which is detected by the air-flow rate sensor for determining the predetermined revolution rate for the combustion fan, is lower than the reference air-flow rate. With this arrangement, it can be appropriately determined whether the relationship between the air-flow rate and the revolution rate for the combustion fan is preferable in a condition that is not affected by external wind condition, and an occurrence of an abnormality or the expiration of a lifetime can be precisely ascertained.

Description

The burner of surveying not normal and invalidation functions is arranged
Affiliated technical field:
The present invention relates to a kind of burner, as water heater, the hot water for bathing device; Indoor heater or the like.Air mass flow and fuel feed that its use air flow sensor control is discharged from outlet burn with control, reach the reduction noxious material, as carbon monoxide, and hydrocarbon, the purpose of the discharge capacity of nitrogen oxide etc.
Background technology
As shown in figure 15, it is the system outline of a common water heater, a modern example as burner.Combustion furnace 2 is positioned at the bottom of combustion chamber 1, combustion-supporting fan 3 be contained in combustion furnace below so that air supply venting waste gas simultaneously.A speed probe is configured on this combustion-supporting fan 3.A heat exchanger 4 is installed in the top of combustion chamber 1, and it is supplied with hot water and uses.Feed pipe 5 is connected on the water inlet inlet of heat exchanger 4, simultaneously with one in order to the water inlet cooling-water temperature sensor 6 (thermistor) of surveying the water inlet water temperature and one water sensor 7 in order to the flow of surveying water inlet, the pipeline that is configured in feed pipe 5 along the line on.
A hot water feeding pipe 8 is connected in the water supply outlet of heat exchanger 4.With one in order to surveying the water supply cooling-water temperature sensor 10 of the water temperature that flows out by heat exchanger 4, along the line as the pipeline that a thermistor and flow control valve 11 in order to control hot water water supply flow are disposed at hot water feeding pipe 8.
On the gas supply pipeline of combustion furnace 2, be equipped with magnetic valve 13 and proportional control valve 14, in order to control fuel gas supply amount.Differential pressure pickup 16-herein as air flow sensor with-pressure ingress pipe 20a and the import of 20b be installed in respectively in the below and flue 19 of combustion furnace.Below combustion furnace 2 and the pressure differential in the flue 19, pass to differential pressure pickup 16 by pressure ingress pipe 20a and 20b respectively, thereby, the pressure differential at this two place is detected.
The sequential procedure of control water heater operation is incorporated among the controller 15.Controller 15 inside possess the control circuit of a cover according to this programme-control operation.Controller 15 is from water inlet cooling-water temperature sensor 6, water flow sensor 7, and water outlet cooling-water temperature sensor 10, differential pressure pickup 16 and remote controller (not shown) receive information.Control electromagnetism 13 simultaneously, proportional control valve 14, combustion-supporting fan 3 and water flow control valve 11, thus realize the heating of water and supply with hot water.Water burned stove 2 by heat exchanger 4 time is heated to the temperature that is set by remote controller etc.By heat
A combustion-supporting fan is in order to give above-mentioned combustion furnace for air and by this combustion furnace and discharge air;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, be used for the stored air flow reference data, these data are used for judging during above-mentioned combustion-supporting fan is with a certain preset rotation speed rotation, whether not normal or inefficacy took place already, also be used for when the said fans stall or with certain fixed rotating speed rotation, when the variation of the above-mentioned air mass flow that is detected by above-mentioned air flow sensor drops within the default allowed band, confirm windless condition; Also be used in said fans with default rotating speed rotation, when weather is calm, and the above-mentioned air mass flow that detects with above-mentioned air flow sensor is when lower than above-mentioned air mass flow reference data, confirms not normal or inefficacy took place already.
6. burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, be used to store the rotating speed reference data, these data are used to judge that keeping the above-mentioned air mass flow that is detected by above-mentioned air flow sensor when above-mentioned combustion-supporting fan immobilizes when rotating under the condition, whether not normal or inefficacy took place already, also be used to confirm satisfying under the above-mentioned air mass flow rigid condition of finding out by above-mentioned air flow sensor when above-mentioned combustion-supporting fan in a period, the above-mentioned change in rotational speed of finding out by above-mentioned rotating speed detector, when being positioned at predetermined allowed band, be windless condition; Also be used for keeping under the above-mentioned air mass flow rigid condition of finding out, confirm not normal when the above-mentioned rotating speed reference data of rotating ratio of the above-mentioned combustion-supporting fan of being found out by described speed probe is higher or lost efficacy to take place already by above-mentioned air borne sensor.
7. burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller; its role is to store an air mass flow reference data; with confirm when above-mentioned combustion-supporting fan during with a kind of default rotating speed rotation not normal or inefficacy whether took place already; also be used for during above-mentioned combustion-supporting fan is with above-mentioned preset rotation speed rotation; the variation of the above-mentioned air mass flow that above-mentioned air flow sensor is found out be positioned within the default allowed band and also the above-mentioned air mass flow found out by above-mentioned air flow sensor than above-mentioned air mass flow reference data hour, confirm to lose efficacy or not normal whether the generation already.
8. burner, its composition comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller; its purposes is to store a rotating speed reference data; when above-mentioned combustion-supporting fan rotates under the satisfied above-mentioned air mass flow of being found out by above-mentioned air flow sensor remains unchanged condition; confirm or lost efficacy whether took place already not normal; also be used to confirm to work as the above-mentioned change in rotational speed that above-mentioned rotating speed detector is found out; keeping under the above-mentioned air mass flow rigid condition of finding out by above-mentioned air flow sensor; be positioned within the default allowed band, not normal or lost efficacy and took place already when simultaneously the above-mentioned rotating speed reference data of being found out by above-mentioned rotating speed detector of above-mentioned rotating ratio is bigger.
9. the burner as claim 5 or 7 also comprises a fuel-control unit, use to the sufficient fuel of above-mentioned combustion furnace supply, and with the calorie value of satisfying the demand,
It is characterized in that,, supply with the above-mentioned fuel of above-mentioned combustion furnace and promptly forced to reduce by above-mentioned combustion controller when above-mentioned not normal or lost efficacy in case found out.
10. burner as claimed in claim 9 is characterized in that: above-mentioned air mass flow reference data comprises one the 1st with reference to air mass flow and one the 2nd with reference to air mass flow, and latter Bi Di 1 is little with reference to flow;
When above-mentioned not normal or lost efficacy and to be detected out, the above-mentioned air mass flow that is detected by above-mentioned air borne sensor is less than the above-mentioned the 1st during with reference to the air mass flow value simultaneously, and then above-mentioned fuel-control unit will be forced to reduce to the above-mentioned fuel of above-mentioned combustion furnace supply;
And being less than the above-mentioned the 2nd during when the above-mentioned air mass flow of finding out by above-mentioned air flow sensor with reference to air mass flow, above-mentioned fuel-control unit will stop to supply above-mentioned fuel to above-mentioned combustion furnace.
11. the burner as claim 6 or 8 also comprises: whether speed is not normal or lost efficacy with judgment means.For this reason, employed first method is to be used in combustion-supporting fan stall or under by a certain specific rotation speeds rotating condition, the air mass flow that monitoring is found out by air flow sensor.Second method is to be used for when the air mass flow of being found out by air flow sensor keeps a special value, the rotating speed that monitoring is measured by the rotation speed of the fan detector.The principle of the two institute's foundation is the same.To alternately introduce the present invention below and use this two kinds of required devices of method.
According to first aspect of invention, a kind of burner is provided, it comprises:
A combustion furnace;
A combustion-supporting fan, it provides air and goes out air from this combustion grate to described combustion furnace;
An air flow sensor is in order to supply with the air mass flow of described combustion furnace on the air flue on surveying from the air feed to the exhaust pathway; With
A controller, it can confirm that the air mass flow that the outside is measured by air flow sensor when being in windless condition changes in predetermined allowed band during combustion-supporting fan does not rotate or rotates with constant speed.
Provide a kind of burner on the other hand according to described first, it comprises:
A combustion furnace;
A combustion-supporting fan, it provides air to described combustion furnace, and goes out air from this combustion grate;
A rotating speed detector, it surveys the rotating speed of described combustion-supporting fan;
An air flow sensor, the air mass flow on air flue on it can survey from the air feed to the exhaust pathway; With
A controller, the rotation speed change of being measured by rotating speed detector during it can be confirmed the outside combustion-supporting fan rotates when being in windless condition make the air mass flow of being measured by air flow sensor maintain a steady state value in the predetermined range.
According to above-mentioned first invention, whether the outside is in windless condition is easy to confirm.
An aspect according to second invention provides a kind of burner, and it comprises:
A combustion furnace;
A combustion-supporting fan, it provides air and goes out air from this combustion grate to described combustion furnace;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, it is storing the air mass flow reference data, in order to determine when combustion-supporting fan rotates with desired speed.Whether device lost efficacy or is not normal; And in order to confirming in combustion-supporting fan stall or under with the constant rotational speed rotating condition, whether the outside was in windless condition when the variation of the air mass flow that is recorded by air flow sensor was within the predetermined allowed band; In addition can also be in order to confirm; when air mass flow is lower than the referential data of storing; device really has been in not normal or disabled status, and the air mass flow of this moment is by air flow sensor, records under the simultaneously calm condition in the rotating speed of combustion-supporting fan keeps preset range.
According to second invention on the other hand, provide a kind of burner, it comprises:
A combustion furnace;
A combustion-supporting fan, it provides air and goes out air from this combustion grate to described combustion furnace;
A rotating speed detector, it surveys the rotating speed of combustion-supporting fan;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, it is storing the reference data of rotating speed, in order to confirm rotation when combustion-supporting fan make the air mass flow of measuring by air flow sensor when keeping constant not normal or inefficacy whether take place; Also can be used to confirm make the air mass flow of measuring by air flow sensor keep constant, and when being in the predetermined allowed band, whether be in windless condition by the rotation speed change that rotating speed detector is measured when the rotation of combustion-supporting fan; And it is in order to confirming making the air mass flow of being measured by air flow sensor keep constant when the rotation of combustion-supporting fan, and device is not normal or lost efficacy when being higher than described reference rotation velocity by the rotating speed that rotating speed detector is measured.
According to described second invention,, also can suitable detection go out and the not normal of device or inefficacy in the relation that can suitably monitor under the calm situation between air mass flow and the combustion-supporting rotation speed of the fan.
An aspect according to the 3rd invention provides a kind of burner, and it comprises:
A combustion furnace;
A combustion-supporting fan, it provides air and goes out air from this combustion grate to described combustion furnace;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, in order to the reference data of stored air flow, these data be used to confirm when combustion-supporting fan during with predetermined rotational speed device whether not normal or lost efficacy; And in order to confirm that the air mass flow variation of being measured by air flow sensor is in the predetermined allowed band during combustion-supporting fan rotates with desired speed; and when being lower than described reference air flow by the air mass flow that air flow sensor is measured, not normal or lost efficacy and took place already.
Another one aspect according to described the 3rd invention provides a kind of burner, and it comprises:
A combustion furnace;
A combustion-supporting fan, it provides air and goes out air from this combustion grate to described combustion furnace;
A rotating speed detector, it surveys the rotating speed of described combustion-supporting fan;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller; in order to store the rotating speed reference data; data are used for confirming when the feasible air mass flow of being measured by air flow sensor of the rotation of combustion-supporting fan keeps stablizing; whether not normal or inefficacy took place already; and in order to confirm making the air mass flow of measuring by air flow sensor keep stable when the rotation of combustion-supporting fan; and be in the predetermined allowed band by the rotation speed change that rotating speed detector is measured; and when being higher than described reference rotation velocity by the rotating speed that rotating speed detector is measured, not normal or lost efficacy and take place.
According to described the 3rd invention, about the detection of no flow of external air, and concern the detection that departs from regime values between air mass flow and rotation speed of the fan, can finish simultaneously.
According to an aspect of the 4th invention, second of the present invention or the 3rd 's burner also comprises a fuel-control unit, is used for supplying with the enough calorific value (calorie) of fuel to produce needs to combustion furnace.When the not normal or inefficacy of installing already was detected out, the fuel of supplying with combustion furnace was just just lowered by this fuel-control unit forcibly.
A kind of improved form according to described the 4th invention burner; the reference data of first group of relevant air mass flow is provided; with be second group of low air mass flow reference data than first group; when the not normal or inefficacy of installing is detected out; and the air mass flow of being found out by air flow sensor is when low than first group of reference data, and the fuel of supplying with combustion furnace is just lowered by fuel-control unit forcibly.When the air mass flow of being found out by air borne sensor is low than second group of data, supplies with the fuel of combustion furnace and will be ended by fuel-control unit.
According to described the 4th invention on the other hand, the burner of described second or the 3rd invention; Also comprise a fuel-control unit, in order to the fuel of supplying with the combustion furnace suitable quantity to keep required calorific value (calorie).Be detected out in case install not normal or lost efficacy, fuel-control unit just forcibly reduces the fuel of supplying with combustion furnace.
According to the burner of the another kind of improved form of described the 4th invention, first group of rotating speed reference data and second group of rotating speed reference data are provided than first group higher.When the not normal of device or lost efficacy and to be detected out, and the rotating speed of being found out by rotating speed detector is when high than first group of rotating speed reference data, and fuel-control unit will reduce the fuel of supplying with combustion furnace forcibly.When the rotating speed of being found out by rotating speed detector is high than second group of rotating speed reference data, fuel-control unit will stop to the combustion furnace fuel supplying.
According to described the 4th invention, even concern between air mass flow and the rotation speed of the fan when having departed from regime values, to supply with by forcibly reducing fuel, the running of device can continue, simultaneously unlikely generation imperfect combustion phenomenon.
According to the 5th invention, a kind of burner is provided, it comprises:
A combustion furnace;
A combustion-supporting fan, it goes out air to described combustion furnace supply air and from this combustion grate;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, in order to surveying windless condition, combustion-supporting fan stall this moment or rotate with constant speed is within the predetermined allowed band and changed by the air mass flow that air flow sensor is measured; And will store as initial value by the air mass flow that air flow sensor is measured, this moment, combustion-supporting fan rotated with desired speed; And detect to be stored and begin to worsen through the ventilation after one period scheduled time from initial value, detected windless condition this moment, and be equivalent to by the variable quantity of detected air mass flow of air flow sensor and initial value during with the rotational speed of being scheduled to or greater than reference value when combustion-supporting fan.
According to described the 5th invention on the other hand, provide a kind of burner, it comprises:
A combustion furnace;
A combustion-supporting fan, it goes out air to described combustion furnace supply air and from this combustion grate;
A rotating speed detector is in order to survey the rotating speed of combustion-supporting fan;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, in order to confirm whether to be in windless condition, the air mass flow that combustion-supporting rotation speed of the fan is adjusted at any time to keep being found out by air flow sensor is fixed on the referential data, and at this moment the change in rotational speed value of being found out by rotating speed detector can think calm when dropping in the default allowed band; And the rotating speed of finding out by rotating speed detector that will this moment, store as initial value; And worsen after initial value storage is through one period scheduled time, surveying to ventilate, detected windless condition at this moment, and the rotating speed of being found out by rotating speed detector and the variable quantity of initial value are equal to or greater than reference value.
According to described the 5th invention, because the initial value of air mass flow has got up in the burner internal reservoir that installs, so the sensitivity of air flow sensor can be according to burner and surrounding environment and adjusted.
According to the 6th invention, a kind of burner is provided, it comprises:
A combustion furnace;
A combustion-supporting fan, it goes out air to described combustion furnace supply air and from this combustion grate;
A rotating speed detector is in order to survey the rotating speed of combustion-supporting fan;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, in order to detect windless condition, method is: when combustion-supporting fan stall, the variation of the air mass flow of being found out by air flow sensor falls within the default allowed band; And when detecting windless condition, by the detected air mass flow of air borne sensor as storing zero point.
According to described the 6th invention; because beyond intrinsic variation and variation because of generation service life; can not be subjected under the mobile condition that influences of outside air; introduce zero correction to air flow sensor; or the cloud corrigendum, the not normal or inefficacy available air flow sensor of device is confirmed out exactly.
An aspect according to the 7th invention provides a kind of burner, and it comprises:
A combustion furnace;
A combustion-supporting fan, it is given described combustion furnace supply air and goes out air from this combustion grate;
A rotating speed detector is in order to survey the rotating speed of described combustion-supporting fan;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, it stores one group of air mass flow reference data, in order to confirming when combustion-supporting fan press the desired speed rotation, installs whether not normal or inefficacy; While is worked as combustion-supporting fan with predetermined rotating speed rotation in order to affirmation, and by the air mass flow that air flow sensor is found out, in the given time, when often being lower than the air mass flow reference data, installs not normal already or inefficacy.
According to described the 7th another system of invention, its composition comprises:
A combustion furnace;
A combustion-supporting fan, it is answered air and goes out air from this combustion grate for described combustion furnace;
A rotating speed detector is in order to survey the rotating speed of described combustion-supporting fan;
An air flow sensor, the air mass flow of the described combustion furnace of supply on the air flue on it surveys from the air feed to the exhaust pathway; With
A controller, its stores rotating speed reference data, when confirming under air mass flow that combustion-supporting fan is keeping being found out by air flow sensor immobilizes situation, to rotate, whether not normal or inefficacy of device; Its is the rotation speed of the fan in order to confirm to find out when with rotating speed detector simultaneously, is maintained fixed when rotating under the condition satisfying the air mass flow of being found out by air flow sensor, often is higher than the rotating speed reference data in the given time, installs not normal already or has lost efficacy.
According to described the 7th invention, survey windless condition and sniffer is not normal or the running of losing efficacy, can be simultaneously and confirm whether be by surveying that free air-flow is moving finishes simply.
Brief description
Fig. 1 is a block diagram, and the burner major part of first kind of embodiment of the present invention is described;
Fig. 2 is a block diagram, and the circuit that reduces the intensity of a fire among first kind of embodiment of the present invention is described;
Fig. 3 is an illustrative diagram, illustrates that the life-span that has of first kind of embodiment of the present invention is determined the water heater of function;
Fig. 4 is an illustrative graph, illustrates in the outer surrounding environment of sniffer, and the relation between wind speed and the fluctuation of differential pressure pickup reading, described sensor is used for detecting the air mass flow of this device.
Fig. 5 A and Fig. 5 B are three stages control combustion pattern and the control combustion patterns when the ability of this water heater has reduced that is used to illustrate water heater;
Fig. 6 is by first kind of flow chart that mode is moved among first kind of embodiment of the present invention;
Fig. 7 is the flow chart of operating by first kind of method of operation among first kind of embodiment of the present invention;
Fig. 8 is by the flow chart of second kind of method of operation among first kind of embodiment of the present invention;
Fig. 9 is by the flow chart of the third method of operation among first kind of embodiment of the present invention;
Figure 10 is by the flow chart of the third method of operation among first kind of embodiment of the present invention;
Figure 11 is by the flow chart of the 4th kind of method of operation among first kind of embodiment of the present invention;
Figure 12 is a curve map, the relation of the combustion gas volume of expression water heater firepower and supply;
Figure 13 is a curve map, the relation of expression water heater firepower and air mass flow;
Figure 14 is a curve map, illustrates between pressure reduction and air mass flow to concern, air mass flow system is by being found out in order to the differential pressure pickup that detects air mass flow;
Figure 15 is an illustrative program sketch, and water heater is a kind of common burner among the figure;
Figure 16 is a curve map, the target output value of expression air flow sensor and the relation between the rotation speed of the fan;
Figure 17 is the chief component block diagram of explanation second kind of embodiment burner of the present invention;
Figure 18 is a curve map, and its explanation reduces data (the 1st rotating speed reference data) for amount and the life-span is confirmed to concern between the data (the 2nd rotating speed reference data), and these data based second kind of embodiment of the present invention were used during mode operation by the life-span.
Figure 19 is a curve map, according to second kind of embodiment of the present invention, concerns that this rotation speed of the fan is obtained by each sensor export target value between the mean value of its expression sensor export target value and rotation speed of the fan;
Figure 20 is a flow chart by the burner operation of second kind of embodiment of the present invention;
Figure 21 is the flow chart of expression by the operation of the burner of second kind of embodiment of the present invention.
Figure 22 is a block diagram, and its expression is by the major part of the burner of the third embodiment of the present invention;
Figure 23 is a flow chart, and its expression is by the operation of the third embodiment of the present invention;
Figure 24 is a flow chart, and its expression is by the operation of the third embodiment of the present invention;
Figure 25 is a group profile curve, and it shows to obtaining determines the required data of ratio, can be used as a kind of reference data, determines to go up at certain time intervals the variation of surveying of keeping service data and initial value.
Figure 26 is the operational flow diagram of the 4th kind of embodiment of expression the present invention;
Figure 27 is the curve map of first kind of method of operation among first kind of embodiment of explanation; With
Figure 28 is the curve map of first kind of method of operation among first kind of embodiment of explanation.
First kind of embodiment of the present invention, and second kind, the third and the 4th kind of embodiment will be described in detail with reference to accompanying drawing below.The used Ref. No. of prior art part is still continued to use in an embodiment in front, is used to represent relevant or identical parts, no longer is described in embodiments of the invention.
In the following embodiments, by the air mass flow that air flow sensor 16 detects, be meant the air mass flow or the air flow sensor output that detect.Air flow sensor, because its form difference, its direct output representation method is also different, the working voltage that has, other physical quantity of the use that has, but in any case, clearly, by the probe value of air flow sensor output, or in brief, the output of air flow sensor is meant the air mass flow that has detected.
Similarly, the output valve of combustion-supporting fan rotating speed detector or rotating speed probe value are meant the rotating speed that is detected.(embodiment 1)
As shown in Figure 3, as one of burner of the present invention example, it is a water heater.It has confirms device not normal or that lost efficacy and take place.The water heater of present embodiment has a combustion furnace 2, and the intensity of a fire can be controlled in the stove.The vigorous degree of the intensity of a fire is divided into A, B and C shelves.The A shelves intensity of a fire is the intensity of a fire when only opening energy supply switch valve 18a, and it is a magnetic valve.When energy supply switch valve 18a and 18b opened simultaneously, what carry out was two grades of burnings, and it comprises A shelves and B shelves.As energy supply switch valve 18a, when 18b, 18c have opened, the A shelves have just been entered, the flourishing fired state of B shelves and C shelves.Combustion potential in the combustion furnace 2 can be by these energy supply switches 18a, and 18b and 18c etc. regulate.And the variation of the combustion heat, i.e. energy supply switch valve 18a, 18b, 18c etc. are controlled by controller 15.In addition, in the present embodiment, a differential pressure pickup 16 is used as air flow sensor, surveys the pressure differential of combustion furnace 2 above and belows.In addition, the rotating speed of combustion-supporting fan 3 is surveyed by speed probe 28 as a Hall IC.
The feature of this embodiment is: controller 15 has a device that is used for confirming that water heater is whether not normal or lost efficacy, in addition, and the air mass flow that the combustion-supporting fan 3 of a Numerical Control that it is also found out as air flow sensor according to differential pressure pickup 16 is produced.
The differential pressure pickup 16 of Shi Yonging is actually a kind of air flow sensor in the present embodiment, and institute thinks convenient meter, just is called air flow sensor later on.
As shown in Figure 1, in order to confirm whether device has occurred isolated plant not normal or that lost efficacy and comprised thermodynamic state verification device 22, memory mechanism 23, burn-out parts 24, fan reopening device 25, not normal/life-span validator 26 and timer 27.These parts all are the functional parts of controller 15.
Whether memory mechanism 23 is storing the reference data of air mass flow, arrived not normal or inefficacy in order to confirm water heater.These data are with respect to default specific rotation speed of the fan.Memory mechanism 23 is meanwhile also storing several data, and they are: when rotating when the fan stall or by predetermined fixed rotating speed, and the permission fluctuation range of air flow sensor output.The rotating speed of fan is stipulated on demand, in embodiments of the present invention, the rotating speed of fan 3 is transferred to rated maximum, and air mass flow value has at this moment been stored.
Whether thermodynamic state verification device 22 is in calm stable state in the check burner installation environment, and this moment, combustion-supporting fan 3 will stop operating, and promptly rotating speed is zero.The curve of Fig. 4 is represented relation between wind speed size and air flow sensor 16 outputs, and this curve is water heater to be exposed to scrape the data that obtain in the wind environment, is got by experiment.By this curve as can be known, the value of the air mass flow that measures with air borne sensor 16 under windy conditions asymmetricly drops on the upper and lower at zero point.The amplitude of fluctuation strengthens with wind speed to be increased.
Thermodynamic state verification device 22 compares air flow sensor 16 fluctuating range of detected flow or air mass flow when the rotating speed of combustion-supporting fan 3 is zero with the allowed band that stores in memory mechanism 23.This allowed band is used for the affirmation state and is calm or blows.Its basis is to see that fluctuating range is to be equal to or greater than predetermined value; Perhaps, be to be equal to or less than predetermined value.For example, whether the fluctuating range of the air mass flow that records by check has exceeded default permissible value, just can confirm to have the wind state.Have the state of wind also can simply confirm, method is to check the air mass flow value, sees whether it exceeds predetermined absolute figure.
When rotation speed of the fan detector 28 detects that rotating speed has reached default value and when this moment, burning stopped, thermodynamic state verification device 22 will instruct time movement 27 to work scheduled times.At time movement 27 in the operation periods, air mass flow that thermodynamic state verification device 22 will be relatively provided by air flow sensor 16 and the air mass flow reference data that in memory mechanism 23, is storing.If the air mass flow that detects exceeds outside the allowed band, thermodynamic state verification device 22 just can judge it for the wind state is arranged.When the air mass flow that detects in allowed band, then thermodynamic state verification device 22 just can judge it for stable windless condition.Transmit this result simultaneously and give burn-out mechanism 24 and not normal/life-span validator 26.
When combustion-supporting fan 3 rotates with specified maximum speed, when burning is being carried out simultaneously,, report that the air mass flow that detects is lower than the air mass flow reference data if burning shut-down mechanism 24 receives the information that is transmitted by thermodynamic state verification device 22; This burning shut-down mechanism 24 will instruct combustion furnace 2 burn-outs, and transmit this burning stop signal to fan reopening device 25.After fan reopening device 25 was received the signal of the burn-out of being transmitted by burning shut-down mechanism 24, it instructed combustion-supporting fan 3 with a kind of default rotating speed, that is the operation of specified maximum speed.Certainly flame-out in the combustion furnace 2 this moment.And then transmit this fan and reopen signal to not normal/life-span validator 26.
When receive reopen signal after, described not normal/life-span validator 26 will make judgement: water heater is not normal or lost efficacy.At this moment, thermodynamic state verification device 22 has confirmed to be in stable windless condition, and the air mass flow that detects simultaneously is equal to or less than the air mass flow reference data, and this moment, combustion-supporting fan 3 rotated with specified maximum speed.A not normal/life-span signal is output immediately and sends out.If situation is opposite, thermodynamic state verification device 22 has been confirmed as the wind state, the air mass flow that perhaps detects exceeds the air mass flow reference data, even be in stable windless condition this moment, described not normal/life-span validator 26 can judge that water heaters there is no not normal, or the failure period do not reach, so just can not export not normal/disablement signal.
Fig. 2 is the controller circuitry figure in the water heater working.At this moment, not normal/life-span signal is by not normal/life-span validator 26 outputs.This circuit comprises that one is reduced firepower switch sections 32, one fan governors 34 of 31, one firepower characteristic curves selector and a water flow controller 33.
When not normal/life-span validator 26 not normal with one/life-span signal output after, can think that generally this water heater is really not normal or lost efficacy and should scrap in advance.Yet the circuit among Fig. 2 also can make this water heater work one period short time again,, and needn't it be scrapped it replacement up to new water heater at once.This is to arrive a kind of like this degree because the reduction firepower switch 31 among Fig. 2 after receiving not normal/life-span signal, can reduce the water heater intensity of a fire: under these combustion-supporting fan 3 air supply traffic ability, and the unlikely burn incompletely that in combustion furnace 2, produces.
Behind/life-span signal not normal when receiving, reducing firepower switch 31 and immediately combustion force is reduced, for example is that to be reduced to specification be No. 20 (fan-out capability 30,000 kilocalories/time) levels to 24 water heater (fan-out capability 36,000 kilocalories/time) with specification.The combustion force numerical value that this has been lowered is sent to firepower characteristic selector 32 and water flow controller 33.Only get final product in order to reduce combustion force with reducing the way of supplying with combustion furnace 2 fuel.
Fig. 5 A illustrates 3 combusting firepower Characteristics Control data on the class, and these data are put into firepower characteristic curve selector 32.Characteristic curve D 1The first section combustion pattern of expression combustion furnace 2 under A shelves combustion case; D 2The 2nd section characteristic curve of expression when the burning in the combustion furnace 2 is in A and B shelves; D 3 Expression combustion furnace 2 internal combustion are in A, three sections combustion patterns when B and C shelves.Article two, lap Δ D and Δ D ' use so that characteristic curve D between line 1, D 2And D 3Deng conversion slick and slyly more establish smoothly.
The present illustrates, when being in the 1st section fired state, and line D 1Starting point D SIt is the point of a burning capacity minimum.Combustion power increases gradually up to the 1st section combustion power maximum, and this is equivalent to line D 1On terminal point D FIf need higher combustion power, the combustion power in the combustion furnace 2 is increased to two grades of burnings of A shelves and B shelves.This moment, characteristic curve was by D 1D FPoint changes to D 2D pPoint, and characteristic curve D is pressed in burning after this 2Control.When the combustion power in the combustion furnace 2 changed to one grade by two grades, the fired state of this moment was still by curve D 2Control, D 2Starting point D STo become D 1Some D on the line Q, this after-combustion will be by characteristic curve D 1Control.As mentioned above, though burning control curve will become when combustion power variable block thereupon, because of having disposed above-mentioned lap, so the transformation between two characteristic curves can be carried out and unlikely generation vibration smoothly.
Yet, reduce firepower switch 31 combustion potential changed to lower, therefore the fuel feed on Fig. 5 A center line L the right (when the control valve electric current proportional) will be cut off.So, at characteristic curve D 1, D 2And D 3Between lap Δ D and Δ D ' will disappear, the conversion between combustion pattern will be can be slick and sly.For head it off, be received when instructing, and the combustion potential that needs drops on straight line D just from the minimizing combustion power that reduces by 31 transmission of firepower switch 1, D 2, and D 3Between the time, firepower characteristic curve selector 32 will select the lower characteristic curve of firepower (to be arranged in the D of Fig. 5 B as required firepower P 1Line and D 2Then select D in the time of between the line 1), firepower will be by the selected characteristics curve controlled simultaneously.
On the other hand, when receiving that from reducing firepower switch 31 firepower diminishes after the signal, the temperature of the output hot water that water flow controller 33 will be relatively detects by the temperature of setting such as remote controller and by heat outputting water temperature sensor 10.When if the heat outputting coolant-temperature gage that is detected by heat outputting water temperature sensor 10 is lower than the temperature of regulation, water flow controller 33 will limit the volume of the discharge control valve 11 of flowing through so that the hot water of output is consistent with set point of temperature.In other words, because firepower is lowered, the hot water amount also must reduce the temperature of setting to keep thereupon.(the operation order of first kind of operation)
The 1st kind of method of operation of present embodiment describes with reference to the flow chart among Fig. 6 and Fig. 7.The diagrammatic flow of this 1st kind of method of operation is such: when burning is being carried out, reduced if find out air mass flow by air flow sensor, burning will temporarily be stopped, and a diagnostic procedure begins thereupon simultaneously.The 1st step of diagnostic procedure is that fan is rerun.When if the air mass flow that records under specific rotation speed of the fan at the fixed time is positioned at default scope, can think windless condition this moment, and then begins to detect, and confirms whether existing air mass flow is lower than air mass flow reference data.If existing air mass flow is really low than reference data, can only allow firepower to proceed with lower combustion mode.If the air mass flow value that is detected by air flow sensor again is still low, the same diagnostic program will repeat.If the end product of diagnosis confirms that existing air mass flow is really low than air mass flow reference data, can confirm that then the device operating period is full, burning promptly is under an embargo.
At first, on step 101,, not normal/life-span sign is decided to be zero as initial value.Because is to control normal combustion from step 102 up to the program of step 120, so earlier it is done simple introduction at this.On step 102, the input of water is confirmed according to the signal that transmits from water flow sensor 7.On step 104, one in order to the temperature that improves the input current to the required increase feedback amount of set point of temperature (many confessions, FF) calorific value is calculated; The open/close state of firepower switch valve 18a to 18c determines that herein the open degree of proportional control valve also is determined simultaneously, provides simultaneously and the corresponding proportional control valve electric current of open degree; Combustion-supporting fan rotates by rotating speed of pre-refunding of prepurging: and magnetic valve 13 is started working.
On step 105, carry out the check of confirming whether the pre-time limit in refunding has arrived.When the time limit in pre-refunding had reached, the rotating speed of combustion-supporting fan was increased to the numerical value that igniting needs.At this moment combustion can change-over switch and the state that is placed in out of igniter.On step 107, confirm to finish, and on step 112, igniter is extinguished with a flame rod (not shown) igniting.
On step 107, if igniting is considered to certainly, on step 108, check will be performed so, look at whether duration of ignition length is enough.If find above-mentioned duration of ignition of length and not enough, then above-mentioned ignition operation will be repeated.Though if through igniting, lighting a fire successfully is not identified, on step 109, magnetic valve, combustion energy change-over switch and proportional control valve all are closed.At this moment can confirm that the terminal embolism (not shown) of hot-water line 8 closes, and water flow sensor 7 can not surveyed current.On step 111, combustion-supporting fan has been stopped to wait for the reopening of hot-water line embolism.
In step 107, be identified when lighting a fire, in step 112, igniter is extinguished, in step 113, check, whether be zero point with the Warning Mark of determining not normal/life-span.This moment is because in step 101, indicate the sign in not normal/life-span to fix on above freezing, programme-control continues to stride forward in the step 114, there, burning will increase control (FF) and charging minimizing feedback amount control (the few confession by charging, FB) carry out under the condition of control combustion gas volume, also the mode of available water flow control valve control discharge is controlled burning simultaneously.
In step 115, when burning is carried out, check whether be fit to the combustion volume of combustion furnace to determine air mass flow.Generally speaking, following relationship can be set up: I=K Δ P, formula is represented the open degree of proportional control valve 14, that is the relation between valve opening electric current I and air mass flow.Δ P represents the epimere of air flue and the pressure reduction between the hypomere, is equivalent to air mass flow.K is a proportionality constant, and it is determining in advance.When the relation character between valve opening electric current I and air mass flow closes when stating formula, can confirm: air mass flow is fit to fuel requirement, and burning is proceeded, and keeps the control of fan simultaneously.In other words, this burning is desirable, very near completing combustion, thus carbon monoxide, hydrocarbon and the nitrogen oxide content in waste gas is very low.But do not meet in the above-listed formula when above-mentioned relation, on step 117, the information K Δ P of valve opening electric current I and air mass flow is compared.When I than Δ P hour, can think that open degree with respect to proportional control valve 14 is for the fuel gas supply amount, air mass flow is too big.In this kind occasion, in step 118, lower the rotating speed of combustion-supporting fan 3.
When the valve opening electric current I is bigger than K Δ P, then on step 119, detect, to determine that rotation speed of the fan is to be equal to or greater than specified maximum (top) speed.As find that rotation speed of the fan does not reach specified maximum (top) speed (upper limit) as yet, then rotation speed of the fan can increase.Therefore, on step 120, rotating speed is increased to replenish air mass flow.But when rotating speed equates with the upper limit or be higher, air mass flow deficiency (volume of air deficiency) is described.Programme-control this moment runs to proof procedure, judging this air mass flow deficiency whether because of occurring not normal or device uses due to the expiration, or is due to the influence of device environment apoplexy of living in.
At first, on the step 121 of Fig. 7, check whether the sign in not normal/life-span refers to above freezing.Because on step 101, sign has been aimed at 0 point, and just like above-mentioned, programme-control moves on on the program of step 122, at this moment, magnetic valve 13, energy supply switch valve 18a～18c and proportional control valve 14 etc. all is cut off, so that combustion furnace 2 internal combustion stop.On step 123, combustion-supporting rotation speed of the fan meets controlled condition, and just the specified maximum speed with this example rotates.In step 124, air mass flow Δ P and the air mass flow reference data BmmAq that is found out by air flow sensor 16 compared.On step 125, the air mass flow inspection by sampling will constantly repeat, and till surpassed timer 27 word of fixing a number running time, its result will compare with the air mass flow reference data simultaneously.
In working time, if all air mass flow Δ P that detect, all low than air mass flow reference data, the judgement of being made on the thermodynamic state verification device 22 must be calm so at timer.Even but under windless condition, air mass flow deficiency to a certain degree also can be detected, that be since ventilate be obstructed due to, such as water heater 4 has been stopped up by cigarette ash.On step 126, confirm the generation of not normal/inefficacy as not normal/life-span validator 26, at this moment not normal/life-span sign is placed in " 1 " and locates.On the other hand; if the air mass flow Δ P that detects is than air mass flow reference data height; even only occur once in (C minute) between action period at timer; also can think in step 117: the air mass flow Δ P that detects exceeds air mass flow reference data I/K in the low side of pressure; this be not since device not normal or lost efficacy due to; but because the air mass flow that records has been subjected to the influence of draught; for example; a burst of reverse draught blows to air draft one side of hot water, just can temporarily reduce flow.In the program of step 125, the affirmation work of the not normal/failure state of windless condition and device can be carried out simultaneously in step 123.The reference data of air mass flow, can calculate according to certain standard, for example calculate according to following condition: if imperfect combustion continues to carry out and air mass flow is lower than the carbon monoxide that existing flow produces in waste gas, the limiting value of hydrocarbon and nitrogen oxide will improve.
With reference to Figure 27 the program on the step 124 is further elaborated.A curve shown in Figure 27 represents that when fan rotated with specific rotation speeds, the variation of air mass flow is the situation of change of (coordinate transverse axis) in time.When the air mass flow that detects is higher than air mass flow reference data BmmAq, can think that the device operation is normal.But this reference data also often is subjected to the influence of outside air movement, as shown in figure 27.
How the air mass flow reference data time span C1 minute between has institute record by one of outside wind speed influence example.When the outside is distinguished and admirable when being blown into exhaust outlet, the air mass flow that detects can temporarily reduce.Yet, at nature, general long high wind, its direction is not to remain constantly, on period C1 shown in Figure 27, expresses because the fluctuation of outside air-flow, its active force makes air mass flow exceed the BmmAq situation in time.The air mass flow Δ P that as a result, can occur detecting is higher than the situation of reference point BmmAq.When this situation was detected, can confirm to be in had the wind state.
Through having obtained the example of record in period C2 minute after a while, air mass flow is lower than reference data BmmAq again, does not have the extraneous air motion simultaneously.In this case, because the outside is calm, and the air mass flow that detects fluctuating is little, on step 124, will learn that the air mass flow that detects is lower than reference data, though the outside is calm.
As mentioned above, to the affirmation of windless condition and to not normal/or failure state approve that really its way is to finish simultaneously: monitor whether air mass flow continues to be lower than reference data B in certain period of time.
What represent among Figure 28 is to keep under the fixed number situation change in rotational speed of the fan 3 that records in the air mass flow that is detected by air borne sensor.In this case, opposite with said circumstances, the rotation speed of the fan from rotating speed detector detects in a fixing period, often is higher than rotating speed reference data B, therefore, can make the judgement and the judgement not normal or that lost efficacy and whether taken place already of wind simultaneously.
Get back to Fig. 7, when on step 126, device not normal or lost efficacy taken place already, or the not normal/signal that lost efficacy has been when having sent, and signal display apparatus is with entry into service, and it will light a bulb, showed that operating device was not normal already or lost efficacy; Perhaps show on the screen of remote controller, it is told that user's device is not normal or lost efficacy.So the user obtains warning, it is needed for repair and replacement to know that device has needed.
The affirmation device step 122 to 126 that is operated in not normal or that lost efficacy is finished.Take place when detecting to there is no not normal or lost efficacy, it is zero constant that then not normal/life-span acknowledgement indicator will keep.In case detect not normal or lost efficacy to take place, then above-mentioned not normal/the life-span acknowledgement indicator will change " 1 " into.
No matter above-mentioned which kind of situation, the hot water embolism remains the enable possition, and step 102 will be performed to the program of step 113 simultaneously.In step 113, be " 1 " when not normal/life-span acknowledgement indicator has been identified, will be interpreted as that not normal accident took place already and burns and should finish, perhaps for being detected out failure of apparatus.Simultaneously, carry out as shown in Figure 7 step 127 and the program of subsequent step.
On step 127 and its subsequent step, its effect is that a water heater can be worked in the following short time of air mass flow that has reduced because install not normal or lost efficacy taken place after.On step 127, the burning intensity of a fire of water heater is lowered to predetermined degree.For example, with respect to every grade of reduction 1/N in the combustion furnace 2.N is a real number herein, and it can be a mark.In other words, shown in Fig. 5 A, the combustion on L line right side can be cut off.Like this, on step 128, carry out a detection, to determine whether meet design temperature by the firepower (can increase feedback amount combustion gas control) that increases feedback amount calculating acquisition.If the intensity of a fire can, then can restraining under situation in this combustion, the program of step 115 and its subsequent step will be performed.On step 116, confirm streamflow regime for opening (ON, burning continuation), do not move on to 113 and forward on the step 115 from the face programme-control, can match with the combustion of reducing to 1/N.Illustrate with dotted line among the figure.
On step 128, may make judgement: can be not enough by the combustion that charging calculates.More particularly: shown in Fig. 5 A and 5B, after the combustion energy on L line right side is cut, lap line segment Δ D and Δ D ' have disappeared (between the characteristic curve of each retaining), consequently:--lower end of upper end of low combustion energy line and high combustion energy line--the combustion energy that needs just that falls to part between characteristic curve.In this kind occasion, the characteristic line that step 129 will slide to burning control curve low combustion gets on.In order to compensate the reduction of the hot-water supply temperature of causing by selecting low combustion energy characteristic curve, on step 130, discharge control valve 11 will be controlled so that output reduces, and make discharge obtain adjusting, so that can export hot water with design temperature.The process of combustion of step 115 and its subsequent steps will be performed.Similarly, if confirm that in this occasion streamflow regime is out (ON) on step 116, then programme-control does not move on to step 113 but moves on to step 114.
When not normal/life-span acknowledgement indicator set, as mentioned above, on 120, will carry out control to air mass flow in step 115.When the rotation speed of the fan on step 119 is equal to or greater than specified maximum speed, to make detection in step 121, see that whether not normal/life-span acknowledgement indicator is above freezing.Because not normal this moment/life-span is confirmed arrow in step 131 set, device is forced to out of service.The burning operation of back is under an embargo, and its result has avoided imperfect combustion and guaranteed fully.(the operation order of second kind of operation)
Among Fig. 8 the flow chart of painting represented be second kind of method of operation, effect is to confirm whether device has taken place not normal or lost efficacy.The operation of the diagram procedure of second kind of method of operation is as follows: when detecting a unusual air mass flow in burning is carried out, burning will temporarily stop.In diagnostic program, checking under flame-out and fan stop state has wind or calm.Whether when distinguishing windless condition, combustion-supporting fan is pressed the desired speed rotation, also check air mass flow simultaneously and be suitable for.
In first kind of method of operation as shown in Figure 6 and Figure 7,, check landscape and confirm that the not normal/operation sequence that whether had taken place already that lost efficacy carries out in 125 simultaneously in step 123 when burning when on step 122, being stopped.But in this second kind of method of operation, the judgement of landscape inspection and not normal/inefficacy is separately carried out.Because landscape can be determined more accurately, so second kind of method of operation has more advantage.Other process is identical with first kind of method of operation, and number of steps is also identical with first kind of method of operation.By step 101 until step 121, with step 127 until 131 identical, so step 101,102,121 and 131 only are shown in Fig. 8 with corresponding steps in first kind of method of operation.
In flow chart shown in Figure 8, be all affirmation device installation place from step 132 up to step 139 and have or not landscape person.From step 140 to 142, its program is used for confirming or lost efficacy whether take place not normal.When burning begins, though and step 119 confirms that rotation speed of the fan equates with specified maximum (top) speed or bigger, the air mass flow that detects with respect to the gas supply amount, is not enough.In this case, burn in step 132 and will be stopped, purpose is to want to check, the deficiency of air mass flow is owing to certain wind or because due to not normal or the inefficacy.After burning stops, magnetic valve, combustion can switching valve and proportional control valve transfer to immediately and stop the also stall of combustion-supporting fan 3.Program changes step 133 over to then up to 139, to confirm landscape.
When extraneous air motion reaches a certain certain wind speed or when bigger, the output of air flow sensor 16 will be subjected to the influence of landscape, its fluctuation simultaneously is also very big, as described in when Fig. 4 is described.In the program afterwards, will under fan stall and burning halted state, monitor the variable output of air flow sensor 16.
At first, on step 133, moment maximum Δ P MAXWith moment minimum of a value Δ P MIN, import and be stored in memory mechanism 23 as primary data.For instance, with the sensor among Fig. 4 zero point show value as Δ P MAXWith Δ P MINInitial value import into.Checking on step 134, is to be equal to or greater than moment maximum initial value Δ P to determine by the air mass flow Δ P that air flow sensor detects MAXIf the Δ P that detects is greater than moment maximum initial value Δ P MAX, then use this Δ P MAXSubstitute the Δ P value that measures.On step 136, with air mass flow Δ P and the moment minimum initial value Δ P that detects MINMake comparisons, equal or less than Δ P to judge Δ P MINIf Δ P value is than Δ P MINLittler, then use Δ P MINValue substitutes Δ P.Δ P MAXWith Δ P MINValue should be finished in the sample time that timer 27 is scheduled to.So, Δ P MAXWith Δ P MINJust decided.
And then, the Δ P that has been determined MAXWith Δ P MINBetween poor (fluctuating range) calculated, confirm simultaneously whether this difference drops in the default allowed band.As above-mentioned moment maximum Δ P MAXWith instantaneous minimum of a value Δ P MINBetween difference equate with the limit of allowed band D or exceed, promptly, fluctuation when the air mass flow of finding out by air flow sensor 16, because Influences on Wind Velocity, greater than with the corresponding permissible value D of wind speed the time, so, can conclude had wind at that time, and can to know this temporary transient air mass flow by inference under-supply be to be subjected to due to moment, wind influenced.So the program of step 102 and its back is performed then.
If on step 139, maximum instantaneous value Δ P MAXWith minimum instant value Δ P MINBetween difference littler than D, the state of then can affirming is calm and stable.On step 140 and 141, whether affirmation program not normal or that lost efficacy will be performed device.In step 140, when combustion furnace 2 internal combustion fire extinguish, and fan 3 is to be its state of a control just with specified maximum (top) speed rotation.On step 141, with the air mass flow Δ P that detects with compare with reference to air mass flow (BmmAq).As the air mass flow Δ P that records during less than reference data, can think that device is not normal or lost efficacy, worsen because of obstruction because ventilate.At this moment, not normal/life-span is confirmed Warning Mark with set, and a not normal/life-span confirmation signal promptly has been issued simultaneously.In the step of the step 127 in Fig. 7 and its back, combustion can be reduced to 1/N, and a temporary transient burning will allow to continue.(the operation order of the third operation)
Fig. 9 and Figure 10 are the flow charts of the third method of operation of present embodiment, the third method of operation is characterised in that: when device has been worked by the driving of run switch, before beginning to rotate, fan checks landscape, and, install the judgement work of not normal/inefficacy and can in the pre-refunding of the startup of fan, make.Identical in the numbering of the step in this flow chart and first kind and the second kind of method of operation is so locate no longer to do explanation (or only doing brief description).
When run switch was opened in step 101, not normal/life-span acknowledgement indicator returned zero point.On step 301, the maximum instantaneous initial value Δ P of air flow sensor 16 MAXWith minimum instant value Δ P MINBe transfused to, simultaneously, calm sign returns zero.On step 302, in order to confirm whether to have wind or stable timer 27 start working (or restarting).
Step 134 up to the step 134 of 137 program and second kind of method of operation shown in Fig. 8 to 137 identical.Take a sample and definite maximum instantaneous value Δ P by air flow sensor 16 at fixed time MAXTo be done with the work of minimum instant value.Confirm that in step 303 water sensor 7 is closed.On step 304, moment maximum Δ P MAXWith moment minimum of a value Δ P MINPoor, with relatively being performed of allowed band limiting value.As maximum instantaneous value Δ P MAXWith minimum instant value Δ P MINBetween fluctuation when being lower than default allowed band D, can confirm to be in stable windless condition.Simultaneously, calm sign E is by set.But as maximum instantaneous value Δ P MAXWith minimum instant value Δ P MINBetween fluctuation equal or when exceeding allowed band D, can think that being in certain has the wind state, and that calm sign E continues to remain is 0 constant.
Affirmation work about wind will repeat always, up in step 307, till enabling signal of water flow sensor 7 outputs.When water flow sensor 7 had started, programme-control moved on to step 104.On step 104, after receiving the enabling signal that water flow sensor sends, combustion-supporting fan 3 just begins prepurging preparation section rotation (fan was driven away the burning chamber waste gas before combustion furnace takes fire).By the time this preparation section rotation tends towards stability, step 308 in Figure 10, with the air mass flow Δ P that relatively finds out by air flow sensor 16 and under preparation section fixed speed with reference to air mass flow (BmmAq).When learning the air mass flow Δ P that detects after a little while with reference to air mass flow, on step 309, in order to confirm calm sign whether the check work of set promptly begin to carry out.If really during set, this means that air mass flow has become deficiency under, the stable state calm at this.Therefore, can think in this case: making ventilates worsens owing to stop up, and installs not normal or inefficacy.In step 310, not normal/life-span acknowledgement indicator is with set, and a not normal/life-span confirmation signal will be output simultaneously.On step 308, when the air mass flow that detects is equal to or greater than with reference to air mass flow, can confirm that then air mass flow there is no deficiency.In step 309, if calm when being masked as zero, can confirm: air mass flow is under-supply to be because due to the landscape.Above-mentioned two kinds of situations all can be declared and recognize: not be to worsen the not normal or inefficacy that causes owing to stop up the ventilation that causes.On step 106, and the step of back takes fire.
In service in step 106 and thereafter step, when not normal/life-span was confirmed zero setting, burning was normal.But on step 113, when not normal/during life-span acknowledgement indicator set, the step 127 of first kind of method of operation shown in Fig. 7 will be performed until 130 program.Easy speech, the combustion of device can be reduced, and the burning operation is performed.
According to the third method of operation, landscape begin promptly to be determined before the rotation at fan 3, and simultaneously whether not normal the or judgement of losing efficacy also can be determined under preparation section fan 3 rotation situation before combustion furnace 2 internal combustion begin.Compare with second kind of method of operation with first kind of method of operation--there, must temporary transient cease fire, and when fan rotate, judge whether not normal or lost efficacy--affirmation herein not normal/method of inefficacy is very fast, can finish at short notice.In addition, the same with second kind of method of operation, because be under fan 3 not commentaries on classics situations, to confirm landscape, so the accuracy of judging wants height a lot.(working procedure of the 4th kind of operation)
The 4th kind of method of operation of present embodiment, its flow chart such as Figure 11.The 4th kind of method of operation is characterized in that: in burning is carried out, when the known air mass flow deficiency that detects can not solve with the way that increases rotation speed of the fan, confirms that conclusion not normal or inefficacy can make and do not need to stop working.Like this, landscape and not normal/inefficacy can be carried out central affirmation in burning.Second kind of applied numbering of the method for operation in Fig. 8 can be used for representing the program in the flow chart among Figure 11, and such program no longer is illustrated, and perhaps only does short explanation.
In the 4th kind of method of operation, on step 401, when run switch is opened, and not normal/life-span acknowledgement indicator was placed on zero point the maximum instantaneous air mass flow Δ P that detects by air flow sensor 16 MAXWith minimum moment air mass flow Δ P MINBe output and be stored.At this moment the program of execution in step 102 and later step thereof, the burning beginning.Until 121, and step 102 is identical until 121 among Fig. 6 and Fig. 7 until the step 102 of the program of step 121 and second kind of method of operation among Fig. 8 for step 102.In case judge the needs that air mass flow is not enough to satisfy fuel gas, on step 119, begin to carry out check: whether the rotating speed of checking fan 3 is equal to or greater than specified maximum (top) speed.If the rotating speed of fan 3 is less than maximum (top) speed, on step 120, the rotating speed of fan will be increased.If rotating speed is equal to or greater than the maximum (top) speed of regulation, this means that air mass flow can not increase again, have to let alone deficiency.At this moment, on step 121, another check begins to carry out, and checks whether not normal/life-span acknowledgement indicator refers to all the time above freezing.If not normal/life-span acknowledgement indicator remains zero, then can when carrying out, burning judge whether landscape or not normal/inefficacy took place already.At this moment in step 134 until step 138, in default sample time, air flow sensor 16 will detect data in order to determine maximum instantaneous value Δ P at timer MAXWith minimum instant value Δ P MIN
After this, on step 139, maximum instantaneous value Δ P MAXWith minimum instant value Δ P MINBetween difference, will be brought with the limiting value of allowed band D relatively.More particularly: the fluctuating range of the air mass flow of being found out by air flow sensor 16 when fan rotates with specific rotating speed is used to compare with the limiting value of allowed band D.When the air mass flow fluctuating range that predicts is lower than allowed band, can think to be in windless condition.If other situation then must be to be in certain wind state is arranged.
When calm stable status is confirmed, the air mass flow Δ P that on step 141, finds out by air flow sensor 16, brought with air mass flow reference point BmmAq and compared, if the air mass flow Δ P that detects is little than air mass flow reference point BmmAq, this means the air mass flow deficiency, though this moment is calm, can think that device is not normal took place already, or owing to stopped up device was lost efficacy.On step 142, not normal/life-span acknowledgement indicator set, a not normal/life-span signal is output simultaneously.The program of step 127 among Fig. 7 on 130 is performed, and when burning continues the firepower that installs lowered.
Under air mass flow is strictly deficiency and increase situation again, different with first kind and second kind of method of operation-the two all temporarily flame-outly determines whether not normal or lost efficacy then-in this 4th kind of method of operation.Can make judgement in burning is carried out: whether not normal, inefficacy takes place.The situation of hot water interruption in use like this, just can not take place.Determine under the interference-free situation of hot water supply promptly whether not normal/inefficacy takes place.
According to present embodiment, whether not normal device or the available air mass flow of being found out by the air flow sensor that is used to control air mass flow that lost efficacy determined.So, whether can know the not normal or failure phenomenon of generating means very accurately according to above measurement result.So just can avoid following improper process:, so that produced excessive CO gas though device is not normal or the burning of losing efficacy does not still stop.Simultaneously on the other hand, also avoided confirm device not normal/lost efficacy but this device is scrapped it still can work satisfactorily the time.
In addition, under calm stable state, can carry out affirmation not normal or that lost efficacy.That is judge not normal or lost efficacy and be not subjected to landscape to influence (landscape can influence the air flow sensor fluctuation), such as off-site can influence the result of affirmation when blowing against the wind.Therefore, can confirm or lose efficacy whether take place more accurately not normal, thereby the reliability of this affirmation is increased substantially.
In the present embodiment, the generation of/inefficacy not normal for confirming on step 125 shown in Figure 7, provides a C minute period according to first kind of method of operation.If the air mass flow Δ P that detects exceeds the air mass flow reference data in the above-mentioned period, even for once, can think does not have not normal on the device and its operating period does not expire yet yet.Measure all after a little while when the air that detects in minute period at this C, can think that then the not normal of device or lost efficacy sent already than reference point.Yet, from second kind of method of operation until the 4th kind, all be under windless condition, depend merely on comparison detection to air mass flow judge whether not normal or lost efficacy, and needn't preset a period of C minute.On the other hand, when second kind of method of operation until the 4th kind, the air mass flow that detects under stablizing windless condition is than with reference to air mass flow when low, the not normal/failure state of can concluding that device has entered.Yet; in first kind of method of operation; a special C minute period also can be provided; at this moment in the section; if the air mass flow that detects surpasses reference data, even for once, also can think the not normal or inefficacy of this device; when all air mass flows that detect (pressure reduction that detects) all are lower than reference air flow (with reference to pressure difference), but then judgment means was not normal already or lost efficacy.
According to first kind of embodiment, testing fixture is not normal/and the sensor that lost efficacy needn't put in addition.Owing to be used for controlling the also available this affirmation of air flow sensor of air mass flow, thus burner, comprise definite not normal/disabling mechanism, can simplify, thereby the production cost of this device also can lower.
In addition, according to a kind of embodiment, the intensity of a fire of combustion furnace can be adjusted to multiple class.The signal that has sent not normal/inefficacy when not normal/failure detection device is to lower the intensity of a fire, but section data appears lacking on the Characteristics Control data and curves, and need just this combustion that lacks part can the time, the data below the selectivity characteristic control curve can adjusting device be forced in this moment combustion.Consequently, though need be in the combustion energy that data lack part, still can provide burning control characteristic, thereby burning is carried out smoothly without a doubt always.
In this first embodiment,, keep under the situation of immobilizing monitored at rotation speed of the fan by the air mass flow that air flow sensor detects.But technically, clearly, fan is so rotated, immobilize so that keep air mass flow, and the rotating speed of monitoring fan.(embodiment 2)
Second embodiment of the present invention will set forth below.Say that general survey second embodiment is characterised in that: the relation between monitoring air mass flow and the rotation speed of the fan; In addition, when not normal the appearance, carry out an input reduction program; Secondly, when not normal serious, depart from the above-mentioned relation degree when big, promptly conclude not normal or lost efficacy and take place and instruction operation stops.More particularly: store in advance one the 1st kind with reference to data and the 2nd kind with reference to data.Surpass first kind during with reference to data when keeping the constant rotation speed of the fan of air mass flow, the fuel of supplying with combustion furnace will be forced to reduce.When the said fans rotating speed surpasses second kind during with reference to data, fuel is supplied with and promptly is stopped.
In second embodiment, tie up to air flow sensor and keep under the air mass flow permanence condition, confirm generation not normal or that lost efficacy by the mode of rotating speed of monitoring fan.And in first embodiment of the invention, above-mentioned judgement is to keep under the rotation speed of the fan permanence condition, and whether the air mass flow that check is detected by air flow sensor reduces is made.Self-evident, said two devices can provide same result.
Be the simple meter of narration below, with abbreviate as " inefficacy " of " not normal or inefficacy ".
In second embodiment, in when burning, on air flow sensor, make a sensing export target value, this numerical value is that on demand intensity of a fire situation is calculated.Combustion-supporting rotation speed of the fan is in check so that air mass flow meets above-mentioned sensing export target value.
As shown in figure 16, in burning is carried out, when rotation speed of the fan exceeds limiting value of given specific control data, can think to go out to occur that burning stops and program will enter into the life tests pattern by the improper ventilation that stop up to produce.
In described life tests pattern, for from V S1To V SNEach sensing export target value all have several rotation speeds of the fan to be detected and to be stored, these V SSelect by the desired value design organization in system.
In order to survey and store the said fans rotating speed, a kind of rotation speed of the fan fluctuation range data are calculated according to the indication of storage data validity determining device, if enrolled this data.If fluctuation range exceeds default scope, then can think and install the fluctuation that there is wind the installation place and has caused data.At this moment the data that obtain are considered to invalid and are erased, and the data that will newly obtain store into simultaneously.The fan rotation data must be under a calm stable state, obtain and be stored.
The life-span validator will be calculated the mean value of the rotation speed of the fan that is detected by the rotating speed detector, and " input reduces " data and the fail data in this mean value and each the sensing export target value compared.If, certain rotating speed mean value is arranged, as L corresponding to a sensing export target value 1Or more groups data entered input and lost efficacy between the zone, then send and reduce the burning instruction.If on a sensing export target value, rotation speed of the fan mean value has L 2Or more multi-group data exceeds the inefficacy specified data, can think that then device lost efficacy, exports disablement signal simultaneously.Above-mentioned L 1And L 2Be predetermined reference data.
The signal that reduces the combustion energy with the requirement of sending from the life-span validator is corresponding, and combustion can be lowered.Though this moment, air mass flow reduced, burning is still continuing in an air mass flow scope that has reduced, and keeps good combustibility simultaneously in the air mass flow scope that has reduced.But after the life-span, validator was sent the life-span signal, but then judgment means is blocked, ceases fire immediately.Can avoid the burning under the insufficient situation of air mass flow, thus the danger that can avoid carbon monoxide etc. to roll up.
Referring now to accompanying drawing second embodiment is described in detail.The water heater of painting can be used as the burner of present embodiment among Fig. 3.Used numbering is used to represent corresponding or relative parts here among Fig. 3, and no longer describes.
Figure 17 is a block diagram, and the expression life-span is confirmed the structure of device.It also is the feature of present embodiment.This peculiar life-span confirms that device comprises: a combustion controller 1017, a rotation speed of the fan controller 1018, a diagnostic mode running mechanism 1021, be used for diagnosing device lifetime, the operation of combustion controller 1017 and rotation speed of the fan controller 1018 and structure, because that sets forth previously is identical, repeat no more herein.
Diagnostic mode running mechanism 1021 comprises 1027, one timers 1031 of 1022, one rotation speed of the fan instruction 1024, one life-span validator of 1023, one rotation speed of the fan detectors of mechanism of a desired value set mechanism etc.The program of diagnostic mode running mechanism 1021 must be carried out under the fire extinguishing situation in combustion furnace 2.The upper limit that exceeds control characteristic data as shown in figure 16 during the rotating speed of fan 3 is burning is carried out the running of diagnostic mode, and burning promptly is stopped.Limit data is obtained like this: i.e. carbon monoxide, hydrocarbon and the nitrogen oxide content in waste gas are by the data that reach because of imperfect combustion when critical.One or several sensing export target value on the desired value selection mechanism 1022 setting air flow sensors 16 is for the usefulness of life diagnosis.For setting above-mentioned desired value, sensing export target value can be made and imports and be stored in memory mechanism in advance, also available keyboard or a memory card are imported from the outside.Sensor export target value, by desired value selector 1022 selected from V S1To V SNBe transported to rotary speed instruction mechanism 1023.
This rotary speed instruction mechanism 1023 is in regular turn or synthetically with sensing export target value V S1To V SNIn the default time, send rotational speed governor 18 to.For instance, rotation speed of the fan controller 1018 is when receiving the sensor export target value V that is transmitted by rotary speed instruction mechanism S1The time, it will be controlled fan 3 and rotate by following requirement: even equal sensing export target value V by the output valve of air flow sensor 16 S1If that fan governor 1018 is received from rotary speed instruction mechanism 1023 is sensing export target value V S2, then to make fan 3 rotate: even the output of air flow sensor 16 equals V by following requirement S2Each sensing export target value V that transmits by rotary speed instruction mechanism 1023 like this, therewith S1Up to V SNCorresponding, will be in each preset period of time internal fan 3 by different sensing export target value rotations.
Rotation speed of the fan detector 1024 will extract the tachometer value of 1 or several fan 3, and will obtain sensing export target value V S1Up to V SNEach numerical value, and with its storage.Timer 1031 is used to store these rotating speeds.Rotation speed of the fan detector 1024 serves as not obtain rotation speed of the fan successively at interval with T time second, from R 1Up to R M, and be stored in memory mechanism.Corresponding to the rotation speed of the fan of each sensing export target value, detect and store at every turn by rotation speed of the fan detector 1024.Validity check device 1025 begins to obtain fluctuating range, that is the rotation speed of the fan R that is storing 1To R MBetween maximum and minimum of a value poor, and it is compared with the fluctuating range of input in advance, look at that the former is whether within latter's scope.
In the time of in fluctuating range drops on existing amplitude range, can judge that at water heater part is installed, the outside is calm, and the data that detect and store are reliably, effectively.This result is sent on the rotation speed of the fan detector 1024, and the latter surveys at once and store next rotation speed of the fan with corresponding with next sensing export target value.But then, if fluctuating range has departed from the fluctuation range of setting, then the decidable state is owing to have wind and instability.
When the fluctuating range of the rotation speed of the fan that is detected by rotation speed of the fan detector 1024, in the time of not within the fluctuation range of setting, at this moment, 1025 instructions of validity check device repeat to erase the data of storage, and probe wind is fanned rotating speed and stored again.When the fluctuating range of rotation speed of the fan falls within the scope of setting, instruction will be sent: survey and also store rotation speed of the fan with corresponding with next sensing export target value.Like this, the rotation speed of the fan with respect to each sensing export target value under calm stable state just all is detected and has stored.
As previously mentioned, also as can be known, under certain some wind state, by the numerical value that air flow sensor 16 detects, with respect to doing vertical and asymmetric change zero point, Bo Dong the limit enlarges with wind speed simultaneously from the curve of Fig. 4.
Validity check device 1025, the fluctuation range of fluctuating range that is detected by air flow sensor 16 and setting is compared (set fluctuation range and may be defined as numerical value between the upper limit and the lower limit, but also only refer to higher limit sometimes), when having exceeded, amplitude sets fluctuation range (when establishing scope tool higher limit, change and exceed higher limit), can think has certain landscape; If the amplitude of variation (sensor output) that is detected by air flow sensor 26 within the fluctuation range of setting the time, can be thought to be in calm stable state.Easy speech, when the wind speed of the corresponding setting fluctuation range of the wind speed ratio of water heater installation place hangs down, can think that weather is calm.When the comparison of the wind speed in the environment is bigger according to wind speed, can regard as wind.
Data shown in Figure 18 are to be input to life-span validator 1027 in advance.More particularly, with respect to the fan control rotating speed RI on the initial time,, supply with minimizing data RB for one and will be sent to the bigger side of the more same sensing export target of rotation speed of the fan value if do not produce the defective mode that causes because of obstruction this moment; Next step infeeds data with respect to minimizing, and longevity test data RC will be sent to the bigger side of the more same sensing export target of rotation speed of the fan value.Supplying with minimizing data RB is primary reference data, and failure detection data RC is deputy reference data.As shown in figure 19: life-span validator 1027 is given on each sensing export target value (from V S1To V SN) detection and the rotary speed data that stores calculate RA 1Up to RA NMean value.These offer the RA of the rotation speed of the fan of sensing export target value 1To RA NMean value, will be used for comparing with data shown in Figure 180.
For from V S1To V SNThe rotation speed of the fan mean value RA of sensing export target value 1To RA N, will make check, have a look the number of mean value and fall the interior person of area between supply minimizing data wire RB and longevity test data wire RC, than present count L 1Big or equal, (L 1Be 1 or than 1 big integer).Work as L 1Or when falling within the above-mentioned area than the mean value that L1 is Duoed, can burn certainly is to carry out under the not enough situation of air mass flow.This moment, a reduction combustion can will be sent to combustion controller 1017 by signal.
Provide one to determine combustion can reduce what preset value, after the instruction of how many combustion energy of a reduction was issued, the combustion energy will reduce length by length.Quantity that combustion can reduce and the rotating speed mean value number that falls between supply minimizing data RB and longevity test data RC are proportional.When after reduce combustion and can controller 1026 receive the instruction that combustion can reduce, combustion controller 1017 will reduce the valve opening electric current, this electric current is sent to proportional control valve 14, thereby corresponding combustion can be reduced, that is the volumetric gas of supply combustion furnace 2 is reduced.
1027 pairs of life-span validator belong to the rotation speed of the fan mean value RA of each sensing export target value 1To RA NCounting, each surpasses longevity test data (longevity test data RC line.) the number L that selects more in advance when the mean value number 2(L when big 2Be 1 or bigger integer), can judge that though the rotating speed of fan 3 has reached the upper limit and can not increase again, it is insufficient that air mass flow remains, this be because ventilate blocked due to, the burning function worsens, combustion function descends.As a result, signal is issued the life-span.Along with sending of life-span signal, magnetic valve 13 is forced closed, and fuel is supplied with and is stopped, and combustion process is ended like this.
It is big that rotation speed of the fan mean value 1 on each sensing export target value all is not so good as supply with to reduce data RB, and perhaps the number that exceeds of mean value compares L 1After a little while, reduce data RB though their valve opening has surpassed to infeed, the ventilation that this means water heater is blocked and worsen, and exports one simultaneously and is suitable for (normally) signal.
Report mechanism 1030 receives the signal about assay that sends from life-span validator 1027, and sends the notice of this signal.This will be transmitted with suitable mode by the result that the life-span validator obtains, and as being shown on the LCD screen, or light a lamp, or make light flash with literal or symbol, or with boom sound of movement mode transmission check result.(using the flowchart text program)
Design second embodiment according to the method described above, confirm the program that lost efficacy referring now to Figure 20 and 21 explanations.In the step 1101 in Figure 20, implement manufacture hot water's combustion process.At this moment, combustion controller 1017 is supplied with proportional control valve 14 one valve opening electric currents, and this electric current and burning required calorie (heat) are consistent.In step 1102, determine sensing export target value with the corresponding air flow sensor 16 of burn calories number that needs.In step 1103, control flows to the voltage of fan 3, so that the air mass flow that air flow sensor 16 is measured equals sensing export target value.The rotating speed of fan 3 is also controlled simultaneously.
In step 1104, detect rotation speed of the fan.In step 1105, check whether the rotating speed of the fan 3 that detects reaches the upper limit of fan control performance data as shown in figure 16.When learning that rotation speed of the fan does not reach in limited time as yet, can judge that burning is carried out under the normal air flow, burning can continue.If rotating speed exceeds the upper limit, in step 1106, burning is stopped immediately.Programme-control will move on to life diagnosis pattern as shown in figure 21.
When the life diagnosis pattern is worked, at first, in step 1201 shown in Figure 21, setting sensor export target value V S1To V SNThen, in step 1202, fan 3 rotation beginnings.Rotation speed of the fan will be controlled like this, so that the output quantity of air flow sensor 16 equals first sensor export target value V S1In step 1203, be reset timer 1031 and started working.Along with the T time goes over, rotation speed of the fan sensor 28 is surveyed rotating speed R 1And it is storeed in one's memory.On second, the rotating speed of said fans 3 all will be surveyed and be stored at each T.M organizes the fan speed data that detects, R simultaneously 1To R M(M be 1 or greater than 1 integer) is stored.
On step 1207, the fan speed data R that is storing 1Until R MThe difference of middle maximum and minimum of a value is calculated to formulate a fluctuating range.To do check subsequently, look at that whether fluctuating range is less than default fluctuation range value e.When the fluctuating range value equates with e or be bigger, wind can be arranged certainly.The M group rotary speed data that will store up simultaneously is (from R 1To R M), mechanism erases from memory.In step 1201, sensing export target value V 1Again be set, then, survey and store the program of rotation speed of the fan and restart to carry out, and program thereafter be tightly continuous thereafter.In step 1207, check work restarts to confirm whether the fluctuating range value that detects has established fluctuation range value e more little.If this fluctuating range has exceeded default fluctuation range e, then the rotation speed of the fan on sensing export target value will be repeated to survey and store.
If in step 1207, fluctuating range drops in the fluctuation range e, can think calm, simultaneously at sensing output valve V S1On the rotary speed data that is detected be regarded as valid data.In step 1208, by the data R that has been predicted and stored 1To R MCalculate mean value RA 1
In step 1209, check, be sensing export target value V in order to determine whether that rotation speed of the fan mean value number equals N-- S1To V SNNumber.In the present embodiment, as sensing export target value V S1The mean value of the rotation speed of the fan of last acquisition is RA 1The time, N=1.In step 1210, suppose that N value increment is 1, then N=2.In step 1201, sensor axis; Desired value V S2Chosen, and the rotating speed of fan 3 controls like this, so that the output valve of being found out by air flow sensor 16 equals V S2Use and be used for sensor export target value V S1Same program is with sensing export target value V S2On rotation speed of the fan, R 1To R MDetect and store.Further, the fan speed data in the time of calm and fluctuating range can being no more than fluctuation range e detects and stores.In step 1208, obtain data R 1Up to R NMean value RA 2
Obtaining with respect to sensor export target value V S1Up to V SNMean value rotating speed RA 1Up to RA NAfter, in step 1211, determine that the work of losing efficacy begins to carry out.In the middle of the program that determine to lose efficacy, acquisition with respect to sensor export target value V as shown in figure 19 S1Until V SNOn rotation speed of the fan mean value RA 1To RA N, the supply in Figure 18 reduces data RB and life-span specified data RC compares.For example, RA 1Reduce data RB with supply 1With life-span specified data RC 1Compare.Equally, will be at sensor export target value VS 2On rotation speed of the fan mean value RA 2Reduce data RB with supply 2With life-span specified data RC 2Compare.
As mentioned above, will with sensor export target value V separately S1To V SNCorresponding rotating speeds mean value RA 1To RA NAnd supply with and reduce data RB 1To RB NAnd life-span specified data RC 1To RC NCompare.At these rotating speed mean value RA 1To RA NIn the middle of, number is grown the number that reduces the average rotation speed of the fan between data RB line and the inefficacy specified data RC line in supplying with.If the number that falls within mean value in the above-mentioned area that number goes out is equal to or greater than predefined with reference to figure L 1, send fuel and reduce command signal.If L is arranged 2Individual (predefined reference number) or more a plurality of rotation speed of the fan mean value are present in inefficacy specified data line, on the RC line, can confirm that then device lost efficacy, sent disablement signal simultaneously.
To reduce command signal corresponding with combustion, and as described above, combustion can promptly be lowered, and the combustion gas volume of supply also is reduced, and is unbecoming with it to avoid air mass flow, and next step process of combustion brings into operation simultaneously.After disablement signal was sent, device was blocked burn-out state, and is in the burning halted state, that is, burning has been prevented, like this, burnt under the situation of being obstructed is ventilated in the device deterioration and had been prevented.Life-span is determined that the result of work is proved to be and is reported by report mechanism 1030.
In second embodiment, even device lost efficacy as yet, when development is to some extent stopped up more or less in the ventilation of device, and burning just supplying with in air mass flow and carrying out under the defective mode when middle, for reduce combustion can, send combustion and can reduce command signal.Like this, burning can continue and air is supplied with bad problem and also can be resolved.Because the burn deterioration problem has solved, water heater can be used by new equipment always and substitute it, and is real in convenient.
In addition, because in the present embodiment, device lifetime, diagnostic mode was worked under the combustion furnace flameout state, so diagnosis will be more accurate.As everybody knows, at the air drag on the air flue--in smokejack 29--can be because of combustion furnace 2, have or not burning differentiated from fan 3.It is bigger when combustion furnace has fire than the gas-flow resistance of truce space-time.The increase of air flow resistance changes according to combustion energy (calorie).In the present embodiment, because the life-span is determined to make under the truce state, that is, promptly, make under the stable status, so more accurate and reliable not discharging the resistance fluctuation of air.
Although in the above-described embodiments, there are many sensing export target values to be set, can only select one of them for use.In addition, though on each sensing export target value, many rotation speed of the fan R are arranged in the present embodiment 1To R NBe detected out, but have only the detection operations of a rotation speed of the fan to be done.The evaluation work of averaging in this case, has been cancelled.And in the present invention, the data and the mean value that detect are suitable.Change sentence and put, to the detection of rotation speed of the fan with ask the work of rotation speed of the fan mean value suitable.When having only a sensing export target value to be set, have only a rotation speed of the fan value to be detected simultaneously when being used for determine losing efficacy, so, determine that program just can finish in a short time.Yet when setting many sensing export target values, and many rotation speeds of the fan are detected, and as described in present embodiment, losing efficacy, confirm can be more accurate.
In addition, in second kind of embodiment, prescribe a time limit above going up of control characteristic data when the rotating speed of fan 3, burning stops immediately, and the while working procedure will move on to diagnostic program and get on.In another example,, a failure diagnosis Warning Mark can be set, and failure diagnosis can be carried out in due course when rotation speed of the fan surpasses last prescribing a time limit.For example, after the truce, device did not still use, or carried out before burning igniting again.Or after device used, burning did not stop, even rotation speed of the fan exceeds the upper limit, and installed under the situations such as still can continuing use, made failure diagnosis.Like this, the user just can not feel not, and its validity is improved already when using this device.In the case, carry out following program.That is: how much exceed limiter according to rotation speed of the fan, determine degree of safety.In the most serious occasion, burning will be stopped immediately, so that carry out failure diagnosis.In not too serious occasion, burning can be proceeded, through doing failure diagnosis after the use of an appropriate time again.
Further, in the above-described embodiments, the fan control performance data upper limit that is provided with for the driving that prevents fan 3 is used as the reference data of the upper limit failure diagnosis of rotation speed of the fan.Also can prevent outside the ceiling restriction device of fan driving, the special-purpose ceiling restriction device of another one, when rotation speed of the fan surpassed the special-purpose ceiling restriction device of this failure diagnosis, failure diagnosis can be carried out by said procedure.
In the foregoing description, all keeping monitoring rotation speed of the fan under the air flow target value condition.Say technically, under rotation speed of the fan is kept certain condition, the air mass flow that monitoring is detected by air flow sensor 16, its result also is the same.Under this occasion, infeeding the minimizing data is primary reference datas lower than suitable air mass flow, and the inefficacy specified data is deputy reference data, and it is lower than first reference data.By under certain specific rotation speeds rotation situation, as if the air mass flow that is detected by air flow sensor, low than the first low reference data, device moves under the pattern under supply subtracts at fan; But when the air mass flow that detects was lower than second reference data, the fuel of supplying with combustion furnace 2 promptly was stopped.
(embodiment 3)
About this 3rd embodiment of the present invention, will set forth below.
According to the general introduction of the third embodiment of the present invention,, keep to immobilize at rotation speed of the fan, and the air mass flow under the windless condition is stored as initial value in the starting stage of burning.Every a period of time, under similarity condition, measure air mass flow termly then, air mass flow numerical value and the initial value that obtains compared to confirm its life-span.
In the 3rd embodiment, under not commentaries on classics of fan condition, obtain several output valves of air flow sensor 16, for example, burner or is mounted and finishes as yet not between burn period etc. just in transit.If the fluctuation of the output valve that record this moment is within allowed band, then state judging will be judged to calm.
According to stablizing the air flow sensor output valve that detects under the windless condition, the initial value under this state will be established and store.
Then, fan begins rotation by default with reference to condition under not igniting situation of combustion furnace.When state judging was confirmed to stablize and be calm, the output valve of air flow sensor was removed.Can set up an initial value according to obtained data, this initial value is used as the reference of confirming whether ventilation worsens, stores simultaneously.
Initial value at sensor was got under windless condition already; confirm that simultaneously the initial value of improper ventilation set up already; on the default time interval, take out the output valve of the air flow sensor under combustion furnace truce and the fan stop state termly so, be used for confirming whether weather has wind.If confirmed as calm stable state, then calculate under this state, with respect to initial value, the fluctuating range of sensor output.If fluctuation exceeds default referential data, thinks that then sensor has fault, sends a decision signal.
Under sensor there is no defect situation, combustion furnace did not have fire, fan according to set up initial value same begin to rotate with reference to condition.This moment, an air quantity delivered sensor was removed as the value of keeping in the output valve of stablizing windless condition.This value of keeping is perhaps taken a sample to the fluctuation between the value of keeping that obtains in now and the value of keeping that obtained last time with respect to the fluctuation of initial value.If this fluctuation exceeds default reference point, send the warning that causes improper ventilation owing to stopping up.
After caution signal sent, the intensity of a fire in combustion furnace gradually reached just often, detected the requirement that needs drive fan.If detected driving requires to surpass the upper limit of control range, issue device lost efficacy and warned immediately, and this danger reporting is shown by suitable display unit, and burning simultaneously is forced to cease fire.
With reference to the accompanying drawings the 3rd embodiment illustrated below, on Figure 22, shown the feature structure of present embodiment.Wherein, a sampling mechanism 2025 is provided, a state judging 2026, an initial value is set up mechanism 2027,1019, one defect sensor detectors 2030 of memory 2028, one fan drives of mechanism, 2031, one displays 2034 of a life-span validator and a time movement 2035.These mechanisms all will follow the program behavior of the storage of controller 15.
Sampling mechanism 2025 uses time movement 2035 to obtain the output valve of air borne sensor 16 as timer.When this time movement started device, or starts after predetermined time interval how long starts from device again by the default time; For example through one day, a week even one month.Above-mentioned output valve is transmitted to it when state judging 2026 needs, send initial value equally to and set up mechanism 2027, supplies with to reduce controller 2033 and ventilate to worsen determining device 1032.
As shown in Figure 4, for air flow sensor 16 output valves, permission fluctuation range e under windless condition is preset in the state judging 2026 in advance, as everyone knows, a water heater is installed in the open air, the wind of blowing motion device will make the output valve of air flow sensor 16 produce fluctuation, even fan 3 is in stop state.In the present embodiment, the stable time span of air flow sensor 16 outputs, that is, length between calm spell will be detected, and the output valve of air flow sensor 16 in the case is regarded as active data.
More particularly: state judging 2026, (being 10 groups of data at interval with 0.1 second for example) obtains the output valve of some groups of air flow sensor 16 in the default time period.If the excursion of these some groups of data, that is, maximum that obtains and the difference between the minimum of a value fall within the allowed band e, then state judging 2026 certainly these states be stablize calm.If maximum and minimum value difference exceed allowed band e, then state judging 2026 certainly these states wind is arranged.This confirms that the result is sent to initial value and sets up mechanism 2027 and ventilate deterioration determining device 2032.In this occasion, only there is the result who obtains under the windless condition to be transmitted to initial value and sets up mechanism 2027 and ventilate deterioration determining device 2032.
At the beginning of Unit Installation, promptly, ventilate as yet not because of during obstruction worsens, state judging 2026 turns out to be stable windless condition simultaneously, and work as combustion furnace and do not have fire, fan is not cut to and is closed down, and with the corresponding data of the output valve of air flow sensor 16, initial value is set up mechanism 2027 and will be confirmed as the initial sensor values of air flow sensor 16 and be stored in " non-volatile memory mechanism " 2028.In the present embodiment with some groups of minimum of a values of being fetched data or mean value as primary data.If state judging 2026 detects state wind is arranged, then its data will not adopted.
Set up mechanism 2027 at initial value and determined after initial sensing output valve under the windless condition is for " initial value ", fan 3 will not have a combustion furnace 2 under the fiery standard state and rotate, that is, rotate under the maximum (top) speed of fan in the present embodiment control range.At this moment, from the output of air flow sensor 16, in default sample time, take out some groups of output valves by sampler 2025.According to the analysis to these sample datas, state judging 2026 affirmation states are to stablize calm state.The data information (not taking a sample when wind is arranged) that provides according to these air flow sensor 16, the initial value of the air flow sensor 16 when rotation speed of the fan is maximum is established, in order to the reference data of ventilating and worsening, and be stored in the memory mechanism 2028 as judgement.
After initial value is set up by " initial value is set up mechanism 2027 ", fan drives 2029 will receive an instruction with the maximum (top) speed rotary fan from said mechanism 2027, rotate fan according to instruction immediately.Except that set up mechanism's 2027 reception instructions from above-mentioned initial value, fan drives 2029 also worsens decision mechanism 2032 receptions and instructs from ventilating.Fan 3 is rotated by the maximum (top) speed in the control range.
After the sensor primary data and the deterioration judgement primary data foundation of ventilating, ventilate and worsen determining device 2032, from the output of air flow sensor 16, take a sample in the interval at preset timed intervals.Affirmed when state judging 2026 to exist a stable windless condition, an instruction will be transmitted to fan drive mechanism 1019, make fan 3 need the maximum (top) speed running with default standard.
Under the situation that fan 3 is not lighted a fire in the combustion furnace 2 as yet with the maximum speed rotation, when state judging 2026 has been affirmed current calm when stable, ventilate and worsen determining device 2032, by sampling mechanism 2025 output sampling to air flow sensor 16 in default sample time.In addition, with respect to judging the initial value that ventilates and worsen, calculate the fluctuation of the output valve of air flow sensor 16.In the present embodiment, the absolute value that calculates initial value and keep the difference between the data is as undulating value.This undulating value is compared with preset reference data.When undulating value is bigger than reference data, means that obstruction forms, and cause the device ventilation to worsen.At this moment send a caution signal that causes ventilating and worsening by obstruction.The ventilation of device worsens may be because cigarette ash stop up water heater 4, also may be because extraneous dust be deposited on the air intake (not shown), the sweep of fan 3 blades or in Metal-Piercing (not shown).Also can call together when adhering to dust in the combustion furnace 2 and cause improper ventilation.
After receiving warning ventilation degraded signal from the deterioration determining device 2032 that ventilates, life-span determining device 2031 is surveyed the rotating speed of fans 3 under combustion furnace 2 fired states, and confirms whether it has exceeded maximum (top) speed, the i.e. upper limit of control range., can think that the ventilation of device is stopped up to some extent in limited time on rotating speed runaways, required air quantity undersupply simultaneously burns.Send the warning against danger signal, stop the burning in the water heater combustion furnace simultaneously at once.A kind of function that no longer receives the burning instruction begins to play a role, so that later burning becomes is impossible.
Infeed and reduce the ratio of keeping data and initial value that controller 2033 calculating regularly obtain.When the default reference ratio of the ratio that obtains hour, can think ventilates has been stopped up certain degree by flue dust, though as yet not to the failure period.Occurred to the ventilation deterioration degree even stop up, but, given the open degree of the electric current of control ratio switch 14, reduced for the fuel that infeeds of combustion furnace 2 controlled limit switch 14 for obtaining the required air quantity that burns.
The initial value that judge to ventilate worsens and sensor initial value both sides are set up mechanism 2027 and set up by initial value after, sensor fault determining device 2030 will be done following comparison discontinuously, be air borne sensor 16 under windless condition output valve and sensor calm, the comparison of initial value when not having fire and fan 3 in the combustion furnace 2 and not changeing.That is, obtain the undulating value of sensor output with respect to initial value.When undulating value surpasses default sensor reference point, can think sensor defectiveness, at this moment the signal of a sensor fault is issued.
Display unit 2034 worsens determining device 2032 and receives the caution signal that ventilates and worsen from ventilating; Receive the warning against danger signal that this device of report is in failure state from life-span determining device 2031; From sensor fault determining device 2030 receiving sensor fault-signals, on display unit, show these signals then, as on remote controller, showing.Display unit can adopt various display modes: for example be presented at the various symbols on the LCD screen; A lamp on/off causes the flicker of vision attention; Boom device sound is suddenly big or suddenly small: continuous long sound; Sound of desultory sound or interrupted length or the like.In above device, a signal that sends from rotation speed of the fan sensor 28 is used to also judge that fan is stall, or is rotating with the rotating speed of maximum.A kind of signal that is sent by flame rod 20 is used to show whether the burning in the combustion furnace 2 continues.(operating sequence of the 3rd embodiment)
With reference to Figure 23 and Figure 24, specify the course of work of embodiment mentioned above below.Figure 23 illustrates the program of being set up mechanism's 2027 enforcements by initial value, and it is to be used to set up the sensor output initial value under the windless condition and to ventilate worsen the judgement initial value.This program is carried out at reasonable time, for example, in the back of dispatching from the factory for checking purpose, or the inspection after installing, or when sending operating instruction and set up pattern to start initial value with instruction key.On this program, at first, in step 2100, m=0 is set.In step 2101, check that whether combustion furnace 2 is in burning.The signal of the flame rod 20 that receives by detection is checked.When in learning combustion furnace 2, having stopped working, on step 2102, the decision that fan stops will being made.
After this, on step 2103, read air flow sensor 16 outputs.In step 2104, whether whether check is read the work of air borne sensor 16 output valves and is finished, that is, passed through already T minute.The work of read sensor output valve is carried out with the interval every 0.1 second.In step 2104, check will be made: the pass that affirmation is scheduled in second at T, for example 5 times or 10 times, whether the output of sensor has been read.When T second mistake, maximum of calculating sensor reading (MAX) and minimum of a value (MIN) poor on step 2105 then.Check simultaneously will be made: maximum and minimum of a value poor, i.e. whether the fluctuation of the sensor output value that is obtained is arranged within the allowed band e1 (at Fig. 4 e=e1).If do not fall within this allowed band, then meaning has wind this moment, even because obtained by the data of wind effect, can not be as valid data, and these data are not adopted, and after waiting for 24 hours, the step of step 2101 and its back will be reformed.
On step 2105, affirmed that the difference of maximum and minimum of a value has fallen in the limit of scope e1, its minimum of a value or mean value will be read (present embodiment is a mean value), simultaneously with V MIN(m) form is stored and (is V because of the m=0 event in the present embodiment MIN(0)).V MIN(0) is one of sensor initial value of under windless condition, obtaining.
In step 2107, fan 3 does not rotate by the maximum (top) speed in the control range (being 3000 rev/mins in the present embodiment) when combustion furnace 2 has fire.In step 2108, read the output of air flow sensor 16.
In this occasion, there is the output of several air borne sensors 16 to be read.At this moment, in step 2109, whether the reference count time spent passes by.When learning reading duration past tense, in step 2110, the work of fluctuating between the maximum of calculating sensor output valve and minimum of a value promptly begins to carry out.Whether check fluctuation simultaneously falls within the allowed band e2 (e=e2 in Fig. 4).When fluctuation does not fall within the scope e2, mean that data movement and fluctuation are owing to have due to the wind.Do not fetch data, wait for that the process of step 2101 and subsequent step will be reformed after 24 hours.If in step 2110, difference falls within and allows within the fluctuation range e2 between maximum and the minimum of a value, this means that present situation stablizes calm.In some group number-readings, its maximum or mean value (being mean value in the present embodiment) are as V MAX(m) (because of m=0 this moment, so be V MAX(0)) is stored.This is to judge one of the initial value that whether worsens that ventilates.
In step 2112, whether check m equals 3.If m is still not enough 3, m will increase progressively 1 (m increases to 1 from zero in present embodiment 1) in step 2114.In step 2115, operation stops a week, begins to carry out the program in step 2102 and its subsequent step then.By repeating 2101 and its subsequent step, 4 initial values under windless condition, have been obtained, V MIN(0) to V MIN(3), simultaneously, will be in order to 4 initial value V of check ventilation deterioration MAX(0) to V MAX(3) store until m=3.
In step 2112, when confirming m=3, then in step 2113, V MIN(0) to V MIN(3) mean value is calculated, to set up the initial value the V whether sensor of wind is arranged in order to affirmation MINEqually, calculate V MAX(0) up to V MAX(3) mean value is set up in order to confirm to ventilate whether worsen initial value V MAX, this moment the rotation speed of the fan maximum.The V that sets up MINAnd V MAXBe stored in memory mechanism 2028.Step 2100 is to be used for after water heater is installed until 2113 program, ventilates simultaneously and sets up initial value V under the not deterioration situation when weather is calm MIN.And V MAXBe to be used for the reference value that judges and ventilate and whether worsen with the maximum (top) speed rotation and the unplugged situation of ventilating at fan.These initial values are stored subsequently.
Figure 24 is a flow chart, and its explanation is as the initial value V that obtains under windless condition MAXWith sensor initial value V MINSet up also and store later program, whether install improper ventilation or lost efficacy, periodic inspection, for example every burning L 1Inferior, or checked once in every M month.In step 2200, P=0 and N=0.In step 2201, carry out the program of the step 2101 to 2111 in Figure 23 flow chart.Sensor output value V MIN(N) one is stablizing winner one and sensor output V under windless condition and the fan 3 not commentaries on classics conditions MAX(N) when stablizing windless condition and fan 3 and rotate, one calculated and stored with the maximum (top) speed in the control range.
Then in step 2202, obtain the sensor initial value V that under windless condition, presets and store MINAnd the V that in step 2201, obtains MINThe absolute value of difference is as undulating value.This undulating value and default sensor reference point relatively, promptly with present embodiment in air flow sensor 16 allowed band relatively, this confirms that fluctuation is whether in allowed band.In the time of outside fluctuation exceeds allowed band, will affirm that on step 2209 air flow sensor has gone out defective.The signal of a defect sensor is sent by defect sensor verifier 2030 at once, is shown device 2034 simultaneously and shows.In the time of within fluctuation range falls within allowed band, can affirm that then air flow sensor 16 normally moves.And programme-control changes next step 2203 over to.
In step 2203, use the initial value V that has set up MAXWith the data V that on step 2201, obtains MAX(N) as the data of keeping when fan 3 rotates with maximum (top) speed.Infeed minimizing controller 2033 and will calculate V MAX(N) and V MAXBetween ratio.Check above-mentioned ratio whether default little then with reference to ratio.Although can be, in the present embodiment, be to use curve data as shown in figure 25 as reference point with suitable setting value as reference ratio.
On Figure 25, VA 1Be illustrated under the no fiery state when fan 3 rotation speed change the output valve of air flow sensor 16.Data V APBe at A 1Try to achieve under the state, i.e. Zhuan Zhi air flue blocked state not.Equally, relation also can be obtained when plugging rate has some variations between sensor output and the rotation speed of the fan.As 90%, 60%, 50% or also can calculate respectively in 30% o'clock.Data VA 1Making rear venting at device does not have extremely under the stopping state and obtains.
Curve data V A2Expression is when not having fire ventilate the again output valve of air flow sensor 16 and the relation of rotation speed of the fan variation under the situation of blocking not in the device initial combustion stove 2.Generally, when burning, the increase when air drag is more fiery than nothing always.Normal output valve V during like this, with respect to the nothing fire A1, at no fire and draught area A 2Rotation speed of the fan and sensor output value equal V when having Y% to be obstructed A2Data.Because plugging rate Y% is corresponding with the air drag increase of burning, so it can be used as known data when calm, thereby A2 also is known.Therefore, curve V in fact A2Can be from curve data V A1Calculate.Like this, when burning, also can obtain V A2Data.
Curve data V A4Be illustrated in the output valve of air flow sensor 16 under the malcombustion state.The plugging rate of supposing this moment is because of ventilate worsening the output valve V under the normal combustion A2Become W%, V A4Be from data V A1Or V A2Calculate.It should be noted that herein above-mentioned W% calculates when the carbon monoxide in flue has exceeded particular value.
Data V A3Be to cause ventilating in obstruction worsening the sensor output that detects under this not normal occasion.V A3Data are obtained by following formula, V in the formula A1, A 2And A 4Be known; V A3= V A 1 × A 4 A 2 , This moment is with respect to curve data V A1Ventilation area be assumed to A 1, then at V A2, V A3And V A4On plugging rate all with circulation area A 1Different.At curve data V A2On the area of passage be A 2, at curve data V A3The time be A 3, at curve data V A4The time be A 4
In the present embodiment, V A3/ V A1Ratio to be multiplied by a constant K, V in the formula A3: the output valve of not normal sensor when not having fire, V A1: the output valve of normal sensor when not having fire.This result will be as the reference ratio.In step 2203, work as V MAX(N) and V MAXMore above-mentioned reference ratio when bigger or equal, can think not occur stopping up to produce deterioration problem that burning can continue because of ventilating.Therefore, the burning of water heater is to carry out under normal control.
But work as V MAX(N) and V MAXRatio less than above-mentioned during with reference to ratio, can think that device stops up owing to ventilating worsens.In step 2204, whether check equals the rotating speed of fan 3 to maximum in the control range.When rotation speed of the fan does not reach maximum as yet, mean that air mass flow can increase, though because of the sealing of ventilating has produced deterioration, and burning can normally be carried out.
On the other hand,, on P, add " 1 ", whether on step 2205, will check simultaneously P=2 if the rotating speed of fan 3 equals the maximum (is 3000 rev/mins at present embodiment) of control range.Because P=1 in step 2206, supplied with minimizing controller 2033 and will reduce W% to the supply volume of combustion gas, and burning can continue this moment.In step 2207, sampling mechanism 2025 utilizes time movement will confirm the predetermined service time such as the burning time L of device, or be over and done with in M month etc.If time is up in step 2208 the N number will increase " 1 ".
If in step 2205, affirmed P=2, then in step 2211, will check to stop up owing to ventilating whether device is worsened.In particular, ventilating with check that step 2113 is set up on the flow chart on Figure 23 worsens numerical value V MAX, and in step 2201, keep data V each detecting of being got at interval MAX(N) undulating value of the absolute value of difference is calculated between.Then, whether default reference point D is big in the check fluctuation.In the present embodiment, reference point D is set to: D=(V A1-V A2)/2.When initial value and the undulating value kept between the data do not exceed this D value, can affirm the deterioration phenomenon of being obstructed and producing not occur because of ventilation, therefore do not send warning signal.If initial value and the undulating value of keeping between the data have surpassed reference value D, can affirm so and be deposited on blind window because of dust, or the crooked position of the blade of fan 3, or because of dust is attached to combustion furnace 2 inside, or, cigarette ash produced deterioration because of having stopped up water heater 8.At this moment, in step 2212, send warning signal, and show with display unit 2034.
In step 2213, when caution signal sent and water heater combustion furnace 2 still in when burning, whether the rotating speed of check fan 3 has reached the maximum (upper limit) of control range.When learning that rotation speed of the fan does not reach maximum as yet, go up in limited time, then rotating speed can be increased, and burning can continue.When rotation speed of the fan has exceeded in limited time, then can affirm owing to the deterioration that causes by the obstruction of ventilating is quite serious, and failure of apparatus will be inevitable, even rotation speed of the fan increases to maximum.In this occasion, inefficacy determining device 2031 will send a signal warning and lose efficacy and will occur.After caution signal was demonstrated by display unit 2034, the burning in the combustion furnace 2 promptly was forced to stop, and it is impossible that any burning is become, thereby avoids the disaster of burn incompletely.
In the above-described embodiment, the maximum (top) speed of fan 3 is defined as within the control range.Its standard can be decided to be rotating speed and be slightly smaller than maximum (top) speed.In addition, standard also can stipulate by the merit that drive current or fan 3 are finished, rather than according to rotating speed.
In addition, in the above-described embodiments, in the step 2211 in the flow chart of Figure 24, but the reference point D that is provided also calculated in advance come out, and as outer input data.But install the V that oneself also can obtain among Figure 25 according to the rotating speed of fan 3 A1Data also can be according to calculating acquisition reference point D and being set.The also available D=(V that is different from of reference data D A1-V A3)/2.
In addition, in the above-described embodiments, shown in the step 2211 of flow chart among Figure 24, improper ventilation determining device 2032 will calculate undulating value, i.e. the initial value V that worsens in order to the ventilation of confirming to give birth to because of obstruction MAX, and keep data V MAX(N) absolute value of difference between.Yet, judge the undulating value that ventilates and worsen, can be by keeping data V MAX(N+1)--by last procurer of this time period--and V MAX(N)--by a last time period procurer--between the absolute value of difference obtain, that is, obtain with the absolute value of the fluctuation of keeping data on two periods.(being equivalent to slope change).Ventilate and worsen determining device 2032 relatively undulating value and reference data D, the degree that the ventilation that causes owing to obstruction with judgement worsens.Method therefor is identical with top embodiment.Like this, the instantaneous variation of sensor initial value can not considered.From experience as can be known: ventilate stopping up is reciprocal causation, that is: burn incompletely oxidation in the water heater is followed more cigarette ash and generated, and consequently ventilates to stopping up more and worsens.Hence one can see that, and the method with present data were compared with the former data that obtain can not have problems actually.
Rate of change in the data of using volume of air sensor (air flow sensor 16) to detect with the state judging in the foregoing description has judged whether wind.Yet another kind of mode is also applicable.That is: the output that is controlled to keep on the air flow sensor of the rotating speed of fan 3 has a stationary value.When the fluctuation of the rotation speed of the fan of being found out by the rotation speed of the fan sensor is allowing within the fluctuation range, can think calm.And when fluctuation exceeded allowed band, then thinking had wind.In this occasion, also available detection fan drive current or acting amount substitute rotation speed of the fan.Allow to have judged whether wind in the fluctuation range by determining whether the digital variation of detection drops on.
As previously mentioned, when using the drive condition parameter, when having determined whether wind with rotation speed of the fan, the required variable quantity of available running is for example with the variation of the rotation speed of the fan deterioration that obstruction produced of confirming to ventilate.Drive condition, as rotation speed of the fan, the output valve of its air flow sensor is as a setting value, and when not existing the ventilation that is caused by obstruction to worsen, this setting value can be used as initial value.Obtain drive condition at interval at a preset time, as the rotation speed of the fan of fan in order to the output that keeps identical air flow sensor.The difference fluctuation of running on each interval and initial value is interrupted the poor of the condition of going up with last one on the perhaps present interval, when surpassing the permission reference point, just means that stopping up the deterioration that causes by ventilating occurs.
According to described the 3rd embodiment, a sensor primary data--when calm,--and one ventilate to worsening and judge primary data--when fan during with the rated rotational frequency rotation of needs--set up in advance as the data that obtain when not having burning, and stored to stop up the fan stall as yet.Because of the deterioration due to ventilate stopping up is that available this initial value and the fluctuation of keeping between the data that before obtained are tried to achieve.Therefore, the initial value of burner air flow sensor is changed, so should not obtain in transit.And should determine accordingly with the environment facies after installing.Therefore, can judge accurately that stopping up generation by ventilating worsens the inefficacy that is caused.
In addition, in this third embodiment, because the data of air flow sensor all obtain with setting-up time when the fan stall at interval, so the fluctuation that can be used on sensor initial value when calm judges that sensor has fault-free.Because the output valve of being sent by the sensor that has can not be used as valid data, so be improved, it is to being improved because of the ventilate affirmation of the deterioration due to stopping up and the reliability of this program.(embodiment 4)
In the third embodiment of the present invention, under windless condition, when the difference of the output valve of air flow sensor 16 and primary data exceeds allowed band, can assert the air flow sensor defectiveness.But the air flow sensor of some kind if suppressed zero also can continue to use, is given initial value zero point as long as at this moment add a fluctuation corrected value.Four embodiment of the invention is characterised in that: the output valve value at zero point of surveying and proofreading and correct air flow sensor 16 under windless condition.
Figure 26 is the detail flowchart of detection value at described zero point.In the program of Figure 26 example, be to be activated, but carry out 0 point calibration under the cool situation at device.
As shown in figure 26,, when air flow sensor has started, at first,, give output counting m reset,, also can be made as the output maximum V of air flow sensor as inappropriate data-signal for air flow sensor 16 as initial value when hot water valve is opened CMAXWith minimum of a value V CMINBe " 0 ".
On step 3001, the output valve V of air flow sensor 16 0Be stored into memory mechanism.
On step 3002, the output valve V of the air flow sensor 16 that is stored 0Be stored in output higher limit Vomaxlimit on zero point and the lower limit Vominlimit on zero point and compare.
In step 3003 and 3004, if output valve V 0Upper limit output valve Vomaxlimit equates or littler with zero point, perhaps than zero point bound output valve Vominlimit bigger or equal, this air flow sensor 16 output valve V then 0To be sent to memory mechanism 30 continuously, as storage data V 0, i
In step 3002, if output valve V 0Equate with upper limit output valve Vomaxlimit on zero point or bigger; Or equate or littler this V then with lower limit output valve Vominlimit on zero point 0Value will be considered to inapplicable and be erased.The counting of inapplicable output signal is stored on step 3013.
In step 3005 and 3006, store standby sensor output value V in one's memory 0, i, be regarded as maximum V CMAXBe used to and next output valve V 0, iCompare, the greater is stored simultaneously as maximum V CMAXThe rest may be inferred, and maximum will be from sensor output value V 0, iIn select, and constantly used by step 3002.
In step 3007 and 3008, in the same manner as described above from sensor output value V 0, iThe middle minimum of a value V that selects 0min
In step 3009, when needs maximum V CMAXWith minimum of a value V CMINDifference calculate, this difference is compared with allowing fluctuation range e.When this difference equates above e or with e, mean that there is wind the outside.It is inapplicable that the data that detect will be considered to, and sensor output must be read again.In the time of in difference is positioned at fluctuation range, mean calmly, simultaneously data store as valid data.
In step 3010, test and confirm sensor output value V 0, iWhether number (being used as the usable levels person of storing) has reached default numerical value t.As sensor output value v 0, iWhen number has reached present count t, sensor output value V 0, iPromptly can be used as the correction number certificate.
In step 3011, calculate the mean value of proofreading and correct data, the while is as the zero-point correction value V of air flow sensor 16 0Be stored in the memory mechanism.This mean value is used for confirming to lose efficacy and be used for controlling air mass flow.
In step 3002 or step 3009, when the data of being found out were considered to inapplicable, in step 3014, the detection times m of inapplicable data compared the number of times M that is used for default.In step 3016 when m＜M, V 0, iReset, the work of the acquisition sensor output in its subsequent step of step 3000 neutralization simultaneously will come into effect.When m=M, mean that do not found out a suitable zero point, send an error signal simultaneously.Zero correction work termination.In this occasion, zero correction is operated in through re-executing behind the preset time.When an error signal takes place frequently when continuous, mean that air flow sensor 16 has fault or device to lose efficacy.
In step 3012, as the result of correction program, obtain the zero point value and can be used as new correction zero point of air flow sensor 16.And programme-control moves to the aft-fan ignition order, and uses air flow sensor to begin normal combustion.
The present invention is not limited to above-mentioned first to fourth embodiment, can also variety of way improve.For instance, although in the above-described embodiments, burning 2 is controlled the burning operation though only arranged three kinds of class, and burning also can be not limited to this three kinds of class, even can use the combustion furnace that is not the combustion switch formula.
In the above-described embodiments, the top of device and the pressure reduction of bottom (combustion furnace 2 is placed in the middle), detected by differential pressure pickup 16, this differential pressure pickup is an air flow sensor, these pressure reduction are only surveyed on the position by needing between the upstream and downstream position at path on the air flue, and this path leads to smokejack from the air intake portion of combustion furnace.Except that above-mentioned position, some other places also can be set on the path survey pressure reduction, for example: the position between fan inlet and combustion chamber, position between fan outlet and combustion chamber, position between the air inlet/outlet of and fan suitable for reading, or the position between combustion chamber and exhaust outlet at the smokejack of water heater.But in structure shown in the present embodiment, but only survey the top on path and the pressure reduction of bottom (combustion furnace 2 is placed in the middle), this be because, for water heater, combustion furnace 2 is seldom by obstructions such as dust, and in combustion furnace 2, produce the instantaneous variation of air drag hardly, so 3 driven air flows of fan can accurately be found out with pressure reduction.For this reason, in the embodiment of the invention, the system that is adopted fixes on the top of path and the position between the bottom to the position of surveying pressure reduction, and combustion furnace 2 is placed in the middle, and it is rational doing like this.
In above embodiment, differential pressure pickup 16 is used as air flow sensor.But remove after the differential pressure pickup 16, also can be with other sensor with direct or indirect method detecting air flow.As the hot line wind gage, Kaman (Karman) whirlpool wind gage, but direct detection all such as the rotary wind gage of screw.
In addition, in above embodiment, imposing a condition of fan set according to rotation speed of the fan.But imposing a condition also of fan can be according to other condition enactment, such as the drive current of fan or acting quantity etc.In this case, fan is to impose a condition by above-mentioned, rotate as the electric current or the acting amount of fan, simultaneously, by comparison detection to the air mass flow and the mode of reference air flow number confirm that device is whether not normal or lost efficacy.
Judge that landscape are to change and realize with the output that monitors air flow sensor.Yet during fan rotated, its rotating speed will be adjusted sometimes, so that keep a stable air flow sensor output.In this occasion, can be by monitoring that rotation speed of the fan has no change to learn whether wind is arranged.Same method also can be used to monitor the power of fan.
In addition; whether available detection rotation speed of the fan is to come monitoring arrangement not normal or lost efficacy with needed rotating speed or in the mode of bigger rotational speed; whether the output of perhaps using the detecting air flow sensor achieves the above object than the little mode of stipulating of requirement.
In addition, in above embodiment, what be used as burner is single functional hot water device (water heater of a heat supply water).Yet the present invention also can be applicable on the water heater of the multiple function of tool, and this multi-functional water heater possesses hot water supply function and additional bathroom heating function simultaneously, or possesses hot water supply function and circulation heating function simultaneously; Be used to have the burner of multiple combustion furnace, as the bathroom hot water device, indoor heater, indoor cooling device, indoor heating, refrigeration dual-purpose apparatus and air-conditioner etc.
In addition, although what adopt in the above-described embodiments is attractive fan 3, also can adopts to inhale and lead type fan 3.
As mentioned above, burner of the present invention can make burning carbon monoxide in exhaust, carries out under the very low state of hydrocarbon and nitrogen oxide equal size, and can prevent by blocking devices such as flue dust or the air exit embolism do not expected and the burn incompletely that causes.
Whether further, the present invention checks the relation between air mass flow and the rotation speed of the fan in order to prevent burn incompletely, confirm within normal range (NR).Simultaneously, under the output of air flow sensor and rotation speed of the fan are everlasting and are monitored, be used for judging whether the outside has wind.Because various being confirmed to be carried out under the situation that not influenced by external condition, so can avoid error check.
In addition, according to the present invention, the relation between air mass flow and the rotating speed is also under monitoring.When this relation departed from normal condition to the first scope, the combustion gas volume of at first supplying with combustion furnace was reduced, and a program that infeeds minimizing brings into operation simultaneously.The relation of this fruit air mass flow and rotation speed of the fan departs from normal condition to second scope, can think that device lost efficacy already, and burning is promptly extinguished.Therefore can avoid unnecessary repairing or processing.
Further, according to the present invention,, therefore, can use rightly according to the air mass flow output valve that product is different and different with installation environment because the primary data of air flow sensor is at first detected.
In addition, according to the present invention, owing to be to use the air borne sensor output valve that detects under windless condition to carry out zero correction, therefore the obstacle that is produced by the air flow sensor instantaneous variation can be eliminated.

Claims (22)

1. burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller in order to when above-mentioned combustion-supporting fan stall or with during the fixed rotating speed in the preset range rotation, during the variation of the above-mentioned air mass flow that is detected by above-mentioned air flow sensor, confirms whether the outside has wind.
2. burner as claimed in claim 1, it is characterized in that: when above-mentioned combustion-supporting fan stall, or during with the rotation of described fixed rotating speed, the above-mentioned air mass flow that detects by above-mentioned air flow sensor, in a default period, when maintaining in the default scope, above-mentioned controller confirms that promptly the above-mentioned undulating value of above-mentioned air mass flow is within the above-mentioned default allowed band.
3. burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, in order to work as by fan is rotated in a certain way, the above-mentioned air mass flow that the sensor is detected is a fixed value, and the above-mentioned change in rotational speed of the above-mentioned combustion-supporting fan that detects by above-mentioned rotating speed detector, when falling within the default scope, confirm to be in windless condition.
4. burner as claimed in claim 3, it is characterized in that: when keeping the above-mentioned air mass flow that detects by above-mentioned air flow sensor and be a fixed number, the above-mentioned rotating speed of the above-mentioned combustion-supporting fan of finding out by above-mentioned rotating speed detector, when remaining in the default scope in the default period, above-mentioned controller confirms that promptly above-mentioned fluctuation of speed value is positioned within the above-mentioned default allowed band.
5. burner, its composition comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace for air and by this combustion furnace and discharge air;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, be used for the stored air flow reference data, these data are used for judging during above-mentioned combustion-supporting fan is with a certain preset rotation speed rotation, whether not normal or inefficacy took place already, also be used for when the said fans stall or with certain fixed rotating speed rotation, when the variation of the above-mentioned air mass flow that is detected by above-mentioned air flow sensor drops within the default allowed band, confirm windless condition; Also be used in said fans with default rotating speed rotation, when weather is calm, and the above-mentioned air mass flow that detects with above-mentioned air flow sensor is when lower than above-mentioned air mass flow reference data, confirms not normal or inefficacy took place already.
6. burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, be used to store the rotating speed reference data, these data are used to judge that keeping the above-mentioned air mass flow that is detected by above-mentioned air flow sensor when above-mentioned combustion-supporting fan immobilizes when rotating under the condition, whether not normal or inefficacy took place already, also be used to confirm satisfying under the above-mentioned air mass flow rigid condition of finding out by above-mentioned air flow sensor when above-mentioned combustion-supporting fan in a period, the above-mentioned change in rotational speed of finding out by above-mentioned rotating speed detector, when being positioned at predetermined allowed band, be windless condition; Also be used for keeping under the above-mentioned air mass flow rigid condition of finding out, confirm not normal when the above-mentioned rotating speed reference data of rotating ratio of the above-mentioned combustion-supporting fan of being found out by described speed probe is higher or lost efficacy to take place already by above-mentioned air borne sensor.
7. burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller; its role is to store an air mass flow reference data; with confirm when above-mentioned combustion-supporting fan during with a kind of default rotating speed rotation not normal or inefficacy whether took place already; also be used for during above-mentioned combustion-supporting fan is with above-mentioned preset rotation speed rotation; the variation of the above-mentioned air mass flow that above-mentioned air flow sensor is found out be positioned within the default allowed band and also the above-mentioned air mass flow found out by above-mentioned air flow sensor than above-mentioned air mass flow reference data hour, confirm to lose efficacy or not normal whether the generation already.
8. burner, its composition comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller; its purposes is to store a rotating speed reference data; when above-mentioned combustion-supporting fan rotates under the satisfied above-mentioned air mass flow of being found out by above-mentioned air flow sensor remains unchanged condition; confirm or lost efficacy whether took place already not normal; also be used to confirm to work as the above-mentioned change in rotational speed that above-mentioned rotating speed detector is found out; keeping under the above-mentioned air mass flow rigid condition of finding out by above-mentioned air flow sensor; be positioned within the default allowed band, not normal or lost efficacy and took place already when simultaneously the above-mentioned rotating speed reference data of being found out by above-mentioned rotating speed detector of above-mentioned rotating ratio is bigger.
9. the burner as claim 5 or 7 also comprises a fuel-control unit, use to the sufficient fuel of above-mentioned combustion furnace supply, and with the calorie value of satisfying the demand,
It is characterized in that,, supply with the above-mentioned fuel of above-mentioned combustion furnace and promptly forced to reduce by above-mentioned combustion controller when above-mentioned not normal or lost efficacy in case found out.
10. burner as claimed in claim 9 is characterized in that: above-mentioned air mass flow reference data comprises one the 1st with reference to air mass flow and one the 2nd with reference to air mass flow, and latter Bi Di 1 is little with reference to flow;
When above-mentioned not normal or lost efficacy and to be detected out, the above-mentioned air mass flow that is detected by above-mentioned air borne sensor is less than the above-mentioned the 1st during with reference to the air mass flow value simultaneously, and then above-mentioned fuel-control unit will be forced to reduce to the above-mentioned fuel of above-mentioned combustion furnace supply;
And being less than the above-mentioned the 2nd during when the above-mentioned air mass flow of finding out by above-mentioned air flow sensor with reference to air mass flow, above-mentioned fuel-control unit will stop to supply above-mentioned fuel to above-mentioned combustion furnace.
11. the burner as claim 6 or 8 also comprises:
One is that above-mentioned combustion furnace is supplied with the fuel-control unit that suitable fuel is exported with the heat of need keeping,
It is characterized in that in case above-mentioned not normal or lost efficacy and to be found out, above-mentioned fuel-control unit is just forced to reduce and supply with above-mentioned fuel in above-mentioned combustion furnace.
12. the burner as claim 11 is characterized in that, above-mentioned reference rotation velocity comprises one the 1st reference rotation velocity and one the 2nd reference rotation velocity, latter Bi Di 1 reference rotation velocity height;
When above-mentioned not normal or above-mentioned inefficacy is detected out, and the above-mentioned rotating speed that detects of above-mentioned rotating speed detector is when being higher than above-mentioned the 1st reference rotation velocity, and above-mentioned fuel-control unit will force to reduce the above-mentioned fuel to above-mentioned combustion furnace supply;
And the above-mentioned rotating speed that detects when above-mentioned rotating speed detector is when being higher than above-mentioned the 2nd reference rotation velocity, and above-mentioned fuel-control unit will stop the above-mentioned fuel to above-mentioned combustion furnace supply.
13. a burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller is used in above-mentioned combustion-supporting fan stall or during with the rotation of certain fixed rotating speed, when the variation of the above-mentioned air mass flow of being found out by above-mentioned air flow sensor drops within the default allowed band, surveys it and is windless condition; Also be used for to store as initial value by the above-mentioned air mass flow that above-mentioned air flow sensor detects under with default rotating speed rotation situation at above-mentioned combustion-supporting fan at that time; After being used for after storing through a default time from initial value, weather is calm to be confirmed, and the above-mentioned air mass flow of during above-mentioned combustion-supporting fan is with the rotation of fixed rotating speed, finding out by above-mentioned air flow sensor, survey it when being equal to or greater than a reference point and worsen for ventilating with the variation of above-mentioned initial value.
14. burner as claimed in claim 7, it is characterized in that, the variable quantity of the air mass flow of being found out by above-mentioned air flow sensor in the past in above-mentioned default period, when being equal to or greater than above-mentioned reference data, the deterioration of will confirming to ventilate of above-mentioned controller produces.
15. a burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to survey the air mass flow on from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, during being used for rotation at described combustion-supporting fan and making that described air flow sensor is detected and be stable reference air flow, when the rotation speed change that is detected by described rotating speed detector falls into a predetermined allowed band, surveying is windless condition, and described rotating speed of being found out by speed probe is stored as initial value; Also be used for store from above-mentioned initial value after later on through one section preset time, detect windless condition, and the above-mentioned rotating speed of finding out by above-mentioned rotating speed detector to have departed from some the detection when being equal to or greater than described reference data from above-mentioned initial number already be to ventilate to worsening.
16. the burner as claim 15, when the difference that it is characterized in that the above-mentioned rotating speed of being found out by above-mentioned rotating speed detector in the past at Preset Time was equal to or greater than above-mentioned reference data, the deterioration of will confirming to ventilate of above-mentioned controller produced already.
17. a burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to the air mass flow on surveying from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway;
A heat exchanger that is positioned on the air flue, it obtains heat from combustion furnace, and it links with the input pipe of input heating agent and the efferent duct of the above-mentioned heating agent of output;
A fuel-control unit, keep the necessary fuel of temperature that has setting along the heating agent of above-mentioned efferent duct conveying in order to give above-mentioned combustion furnace supply:
A fan governor is with so that above-mentioned combustion-supporting fan by the rotation of certain rotating speed, gives to keep the described combustion furnace required suitable air mass flow of described fuel of burning; With
A controller is used to store an air mass flow reference data, and these data are used to judge whether not normal or inefficacy takes place when above-mentioned combustion-supporting fan rotates with a default rotating speed; Also be used in above-mentioned combustion-supporting fan stall or during, confirm as windless condition when the variation of the above-mentioned air mass flow that is detected by above-mentioned air flow sensor falls within the default allowed band with the rotation of certain fixed rotating speed; Also be used for detecting windless condition and above-mentioned combustion-supporting fan, when the above-mentioned air mass flow of being found out by above-mentioned air borne sensor is lower than above-mentioned air mass flow reference data, confirm not normal or inefficacy took place already with during the preset rotation speed rotation.
18. a burner, it comprises:
A combustion furnace;
A rotating speed detector is used to survey the rotating speed of above-mentioned combustion-supporting fan;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to the air mass flow on surveying from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway;
A heat exchanger that is positioned on the air flue, it obtains heat from described combustion furnace, and links with the input pipe of input heating agent and the efferent duct of the above-mentioned heating agent of output;
A fuel-control unit is used for keeping the necessary fuel of temperature that heating agent that above-mentioned efferent duct carries has setting to above-mentioned combustion furnace supply;
A fan governor, with so that above-mentioned combustion-supporting fan by the rotation of certain rotating speed, to keep the described combustion furnace required suitable air mass flow of described fuel of burning; With
A controller is used to store a rotating speed reference data, and these data are used to keep when rotating under the rigid condition to judge or lost efficacy whether took place already not normal at above-mentioned combustion-supporting fan in the satisfied air mass flow of being found out by above-mentioned air flow sensor; Also be used for immobilizing under the condition keeping the above-mentioned air mass flow of finding out by above-mentioned air flow sensor; the above-mentioned rotation speed change of being found out by above-mentioned rotating speed detector is positioned at a default allowed band, and the above-mentioned rotating speed reference data of being found out by above-mentioned rotating speed detector of above-mentioned rotating ratio is confirmed not normal or lost efficacy to take place already when high.
19. a burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to the air mass flow on surveying from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller, be used for during above-mentioned combustion-supporting fan stall, working as the variation of the above-mentioned air mass flow that detects by above-mentioned air flow sensor, confirm as windless condition when dropping within the default allowed band, also be used for under above-mentioned windless condition by above-mentioned air flow sensor, the above-mentioned air mass flow that detects is as storing zero point.
20. a burner, it comprises:
A combustion furnace;
A rotating speed detector is used to survey the rotating speed of above-mentioned combustion-supporting fan;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
An air flow sensor is in order to the air mass flow on surveying from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway;
A heat exchanger that is positioned on the air flue, it obtains heat from combustion furnace, and links with the input pipe of input heating agent and the efferent duct of the above-mentioned heating agent of output;
A fuel-control unit is kept the necessary fuel of temperature that heating agent that above-mentioned efferent duct carries has setting in order to give above-mentioned combustion furnace supply;
A fan governor, with so that above-mentioned combustion-supporting fan by the rotation of certain rotating speed, to keep the described combustion furnace required suitable air mass flow of described fuel of burning; With
A controller is used for during above-mentioned combustion-supporting fan stall, confirms as windless condition when the variation of the above-mentioned air mass flow that is detected by above-mentioned air flow sensor falls within the default allowed band; Also be used for storing with in the above-mentioned calm above-mentioned air mass flow that detects by above-mentioned air flow sensor under the situation that has been identified.
21. a burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to the air mass flow on surveying from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller; be used for the stored air flow reference data; these data are used for judging or lost efficacy whether take place not normal when above-mentioned combustion-supporting fan rotates with a default rotating speed; also be used for during above-mentioned combustion-supporting fan is by the preset rotation speed rotation; by the above-mentioned air mass flow that above-mentioned air flow sensor detects, confirm that above-mentioned not normal or above-mentioned inefficacy took place already when in a default period, being lower than above-mentioned air mass flow reference data continuously.
22. a burner, it comprises:
A combustion furnace;
A combustion-supporting fan is in order to give above-mentioned combustion furnace supply air and to go out air by this combustion grate;
A rotating speed detector is in order to survey the rotating speed of above-mentioned combustion-supporting fan;
An air flow sensor is in order to the air mass flow on surveying from the air feed path of above-mentioned combustion furnace to the air flue of exhaust pathway; With
A controller; be used to store a rotating speed reference data; these data are used for keeping when rotating under the rigid condition to judge or lost efficacy whether take place not normal when above-mentioned combustion-supporting fan in the satisfied above-mentioned air mass flow that is detected by above-mentioned air flow sensor; also be used for keeping between the rigid condition backspin refunding satisfying the above-mentioned air mass flow that detects by above-mentioned air flow sensor, confirm above-mentioned not normal or lost efficacy and took place already when the rotation speed of the fan of being found out by rotating speed detector is higher than above-mentioned rotating speed reference data continuously in a scheduled time slot when above-mentioned combustion-supporting fan.
CN95195515A 1994-08-31 1995-08-30 Combustion equipment for judging abnormality or life Pending CN1159852A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP230732/94 1994-08-31
JP23073294A JP3566757B2 (en) 1994-08-31 1994-08-31 Combustion equipment
JP24956594A JP3566758B2 (en) 1994-10-14 1994-10-14 Combustor air amount control device and method
JP249565/94 1994-10-14
JP28440394A JP3566765B2 (en) 1994-10-24 1994-10-24 Combustion equipment
JP284403/94 1994-10-24

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KR (1) KR970704995A (en)
CN (1) CN1159852A (en)
WO (1) WO1996007056A1 (en)

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US10935238B2 (en) 2018-05-23 2021-03-02 Carrier Corporation Furnace with premix ultra-low NOx (ULN) burner
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CN107036684A (en) * 2017-05-11 2017-08-11 广东卓信环境科技股份有限公司 A kind of flowmeter fault detection method and device
CN107036684B (en) * 2017-05-11 2019-10-22 广东卓信环境科技股份有限公司 A kind of flowmeter fault detection method and device

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