CN109237115B - Adaptive adjustment method for working range of proportional valve and gas water heater - Google Patents
Adaptive adjustment method for working range of proportional valve and gas water heater Download PDFInfo
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- CN109237115B CN109237115B CN201710557809.8A CN201710557809A CN109237115B CN 109237115 B CN109237115 B CN 109237115B CN 201710557809 A CN201710557809 A CN 201710557809A CN 109237115 B CN109237115 B CN 109237115B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
Abstract
The invention discloses a method for adaptively adjusting the working range of a proportional valve and a gas water heater, wherein the method comprises the following steps of: (1) powering on and starting up the computer, and entering an adjusting mode; (2) the error judgment step comprises minimum working mode error judgment and maximum working mode judgment, (3) calculating the PWM (pulse width modulation) regulation range C of the proportional valve control signal, wherein C = B-A; (4) and N parts of the adjusting range C are divided, each adjusting unit C x 1/N corresponds to 1/N opening degree of the proportional valve, the opening degree is 1 when the proportional valve is fully opened, and N is a positive integer larger than 1. According to the proportional valve adjusting method, only the proportional valve which is not in the normal range is judged and then manually debugged, so that the labor cost can be greatly saved, secondly, the proportional valve control signal PWM value under the minimum number working mode and the maximum number working mode is obtained through calculation, the interval of the two values is divided to obtain the minimum adjusting unit of the opening of the proportional valve, and the adjusting precision is more accurate.
Description
Technical Field
The invention relates to the technical field of valve adjustment, in particular to a method for adaptively adjusting the working range of a proportional valve and a gas water heater.
Background
In the existing gas water heater, because the current value corresponding to the opening degree required by the proportional valve has a maximum value and a minimum value, the current of the proportional valve needs to work in the range, and the production line is totally corrected to the maximum value and the minimum value by manually adjusting a potentiometer at present. The production efficiency is low, the production rhythm is influenced, and in addition, the manual adjustment error ratio is large.
Disclosure of Invention
The invention provides a proportional valve working range self-adaptive adjusting method, which can automatically self-adaptively adjust and solve the technical problems that the conventional proportional valve of a gas water heater is completely adjusted by a manual potentiometer and the production efficiency is low.
In order to solve the technical problems, the invention adopts the following technical scheme:
a working range self-adaptive adjusting method of a proportional valve comprises the following steps:
(1) powering on and starting up the computer, and entering an adjusting mode;
(2) and the error judgment step comprises minimum working mode error judgment and maximum working mode judgment, wherein the minimum working mode error judgment comprises the following steps:
controlling a proportional valve to enter a minimum working mode, and collecting a proportional valve control signal PWM value A output by a singlechip in the current working mode;
calculating a sampling voltage Vmin corresponding to the value A, judging whether the sampling voltage Vmin is located in a normal error range (amin, bmin), if so, executing maximum number working mode error judgment, otherwise, judging that the minimum number working mode error is in fault, stopping regulation, and reporting errors;
the maximum working mode error judgment comprises the following steps:
controlling a proportional valve to enter a maximum working mode, and collecting a proportional valve control signal PWM value B output by a singlechip in the current working mode;
calculating a sampling voltage Vmax corresponding to the value B, judging whether the sampling voltage Vmax is located in a normal error range interval (amax, bmax), if so, executing the step (3), otherwise, judging that the error is a fault in a maximum working mode, stopping adjustment, and reporting an error;
(3) calculating a PWM (pulse-width modulation) adjusting range C, C = B-A of a proportional valve control signal;
(4) and N parts of the adjusting range C are divided, each adjusting unit C x 1/N corresponds to 1/N opening degree of the proportional valve, the opening degree is 1 when the proportional valve is fully opened, and N is a positive integer larger than 1.
Further, in the step (1), after the power-on and the power-on, the power-on and the power-on enter the adjusting mode through a key or a dial switch.
Further, in the step (2), the step of controlling the proportional valve to enter the minimum working mode refers to the opening degree of the proportional valve corresponding to the minimum load after the combustion;
controlling the proportional valve into the maximum mode of operation refers to the opening of the proportional valve corresponding to the maximum load to be burned.
Further, the step (2) is preceded by a step of encoding the minimum number working mode error fault and the maximum number working mode error fault, and in the step (2), when the faults occur, corresponding codes are displayed to prompt the entering of a manual adjustment mode.
Further, in the step (2), when the fault of the minimum number working mode error is judged, whether the sampling voltage Vmin is overlarge or ultra-small compared with a normal error range interval (amin, bmin) is judged, meanwhile, a judgment result is displayed and output, and then the minimum number working mode error manual debugging mode is entered, wherein if Vmin is larger than bmin, the fault belongs to overlarge, and if Vmin is smaller than amin, the fault belongs to ultra-small.
Further, in the step (2), after entering a minimum working mode error manual debugging mode, manually debugging the potentiometer, manually reducing the resistance of the potentiometer if the sampling voltage Vmin is overlarge, manually increasing the resistance of the potentiometer if the sampling voltage Vmin is ultra-small, feeding the voltage of the regulated resistance of the potentiometer back to the single chip microcomputer, correspondingly regulating the proportional valve according to a linear proportion to control the signal PWM value A until the sampling voltage corresponding to the value A is within a normal error range (amin, bmin), and then returning to the step (3) and the step (4).
Further, in the step (2), when the fault of the maximum number working mode error is judged, whether the sampled voltage Vmax is overlarge or ultra-small compared with a normal error range interval (amax, bmax) is judged, meanwhile, a judgment result is displayed and output, and then a maximum number working mode error manual debugging mode is entered, wherein if Vmax is larger than bmax, the fault belongs to overlarge, and if Vmin is smaller than amax, the fault belongs to ultra-small.
Further, in the step (2), after entering a maximum working mode error manual debugging mode, manually debugging the potentiometer, manually reducing the resistance of the potentiometer if the sampling voltage Vmax is too large, manually increasing the resistance of the potentiometer if the sampling voltage Vmax is too small, feeding the regulated resistance voltage of the potentiometer back to the single chip microcomputer, correspondingly regulating the proportional valve according to a linear proportion to control the signal PWM value B until the sampling voltage corresponding to the value B is within a normal error range (amax, bmax), and then returning to the step (3) and the step (4).
Based on the adaptive adjusting method for the working range of the proportional valve, the invention also provides a gas water heater, which comprises the adaptive adjusting method for the working range of the proportional valve.
Compared with the prior art, the invention has the advantages and positive effects that: the proportional valve working range self-adaptive adjusting method comprises the steps of firstly, respectively controlling a proportional valve to enter a minimum working mode and a maximum working mode, acquiring proportional valve control signal PWM values correspondingly output by a single chip microcomputer under each mode, judging whether the PWM values are in a normal range, if the PWM values are in the normal range, keeping the current setting without manual debugging, judging the proportional valve which is not in the normal range and then manually debugging, and dividing the interval of the two values to obtain a proportional valve opening minimum adjusting unit, so that the adjusting precision is more accurate.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an embodiment of a method for adaptively adjusting an operating range of a proportional valve according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a proportional valve working range self-adaptive adjusting method, which is based on the fact that the current value input to a proportional valve is controlled by controlling the current value input to the proportional valve in the prior gas water heater, the current value corresponding to each opening which can be adjusted by the proportional valve has a maximum value and a minimum value, when the opening is adjusted, the proportional valve current needs to be controlled to work within the current value range corresponding to the opening, and the problem of low production efficiency exists because the current production line is totally corrected by manually adjusting a potentiometer, the invention provides a proportional valve working range self-adaptive adjusting method which fully utilizes the maximum current value and the minimum current value of a part of proportional valve to be positioned within a normal interval range, so that extra adjustment is not needed, and only the proportional valve which is not positioned within the normal interval range for the maximum current value and the minimum current value needs to be adjusted, the adaptive adjustment method for the working range of the proportional valve firstly judges which proportional valve has the maximum current value and the minimum current value within the range of the normal interval and which proportional valve does not have the range of the normal interval, the maximum current value and the minimum current value of the proportional valve within the normal range are simultaneously obtained to obtain the current value interval, and the current value interval is divided by N parts, so that the corresponding relation between the proportional valve adjustment unit and the current value adjustment unit can be obtained, and the adjustment precision is favorably improved. The prompting is only performed for the proportional valve which is not in the normal range to enter the manual adjustment, and the adaptive adjustment method for the working range of the proportional valve according to the invention will be described in detail in a specific embodiment.
Example one
The embodiment provides a method for adaptively adjusting the working range of a proportional valve, as shown in fig. 1, which includes the following steps:
s1, powering on and starting up, and entering a regulation mode;
s2, an error judgment step, including minimum number working mode error judgment and maximum number working mode judgment, wherein the minimum number working mode error judgment comprises:
controlling a proportional valve to enter a minimum working mode, and collecting a proportional valve control signal PWM value A output by a singlechip in the current working mode;
calculating a sampling voltage Vmin corresponding to the value A, judging whether the sampling voltage Vmin is located in a normal error range (amin, bmin), if so, executing maximum number working mode error judgment, otherwise, judging that the minimum number working mode error is in fault, stopping regulation, and reporting errors;
the maximum working mode error judgment comprises the following steps:
controlling a proportional valve to enter a maximum working mode, and collecting a proportional valve control signal PWM value B output by a singlechip in the current working mode;
calculating a sampling voltage Vmax corresponding to the value B, judging whether the sampling voltage Vmax is located in a normal error range interval (amax, bmax), if so, executing a step S3, otherwise, judging that the sampling voltage Vmax is in a maximum working mode error fault, stopping adjustment, and reporting an error;
s3, calculating a PWM (pulse-width modulation) adjusting range C of the proportional valve control signal, wherein C = B-A;
because the current of the over-proportional valve is in a direct proportion relation with the opening degree of the over-proportional valve, the proportional valve control signal PWM value A corresponding to the minimum working mode is also the minimum proportional valve control signal PWM value, on the contrary, the proportional valve control signal PWM value B corresponding to the maximum working mode is also the maximum proportional valve control signal PWM value, and the difference between the two is also the control range interval of the proportional valve control signal.
And S4, dividing the adjusting range C by N, wherein each adjusting unit C x 1/N corresponds to the 1/N opening degree of the proportional valve, the opening degree is 1 when the proportional valve is fully opened, and N is a positive integer greater than 1. N may be set according to the actual computation capability of the single chip, for example, for a single chip with a computation capability of 255 bits, N may be set to 255.
In the adaptive adjustment method for the working range of the proportional valve of the embodiment, a plurality of opening degrees exist in the proportional valve in actual working, the method does not need to judge and adjust the current corresponding to each opening degree, only the current corresponding to the maximum opening degree and the minimum opening degree (namely, the opening degrees at two ends) is adjusted, firstly, the proportional valve is respectively controlled to enter a minimum working mode and a maximum working mode, the opening degree of the proportional valve in the minimum working mode is minimum, the opening degree of the proportional valve in the maximum working mode is maximum, proportional valve control signals PWM (pulse width modulation) values correspondingly output by a single chip microcomputer in each mode are collected, whether the PWM values are in a normal range is judged, if the PWM values are in the normal range, the current setting is kept, manual adjustment is not needed, the proportional valve which is not in the normal range can be judged, and then manual adjustment is carried out, and this proportional valve just in normal within range need not artifical debugging, can greatly practice thrift the human cost, secondly, obtains proportional valve control signal PWM value under minimum number mode and the maximum number mode through calculating, cuts apart the interval of obtaining proportional valve aperture minimum regulation unit with two values for the regulation precision is more accurate.
In a preferred embodiment, in step S1, the adjustment mode is entered by a key or a dial switch after power-on and power-on. The adjusting mode is only suitable for opening in the adjusting state, the control logic of the adjusting mode is different from that of normal use, and therefore the proportional valve is defaulted to be in the using mode and needs to be specially set to enter the adjusting mode.
In step S2, controlling the proportional valve to enter the minimum working mode refers to the opening of the proportional valve corresponding to the minimum load when the combustion reaches the minimum load; at this time, the corresponding value a of the proportional valve control signal PWM is also the minimum value of the proportional valve control signal PWM.
Similarly, controlling the proportional valve to enter the maximum operating mode refers to opening of the proportional valve corresponding to the maximum load to be burned. At this time, the corresponding value B of the proportional valve control signal PWM is also the maximum value of the proportional valve control signal PWM.
The system not only judges the fault, but also needs to display the fault to prompt a debugging person, in order to facilitate display and output, the step S2 is preceded by a step of coding the minimum number working mode error fault and the maximum number working mode error fault, and in step S2, when the fault occurs, the corresponding codes are displayed to prompt the entering of a manual regulation mode. And only the content of the displayed codes is concise, the requirement on the display screen is not high, the cost of debugging equipment is saved, and the debugging personnel can read and understand the faults corresponding to the codes by slightly training.
If a value is not within a range interval, two possibilities exist, that is, the value is greater than the maximum value of the range interval or less than the minimum value of the range interval, for the method, when it is determined that the minimum number working mode error has failed, that is, the sampling voltage Vmin corresponding to the PWM value a of the minimum number working mode proportional valve control signal is not within the normal range interval, and the relationship between the sampling voltage Vmin and the normal range interval determines how to adjust, therefore, in step S2, when it is determined that the minimum number working mode error has failed, it is determined whether the sampling voltage Vmin is oversized or oversized compared with the normal error range interval (amin, bmin), and at the same time, the determination result is displayed and output, and then the minimum number working mode error manual debugging mode is entered, wherein if Vmin > bmin belongs to oversized, Vmin < amin belongs to ultra-small.
In the step S2, after entering the minimum working mode error manual debugging mode, manually debugging the potentiometer, if the sampling voltage Vmin is too large, manually reducing the resistance of the potentiometer, if the sampling voltage Vmin is too small, manually increasing the resistance of the potentiometer, feeding the voltage of the regulated resistance of the potentiometer back to the single chip microcomputer, correspondingly regulating the proportional valve according to the linear proportion to control the signal PWM value a until the sampling voltage corresponding to the value a is within the normal error range (amin, bmin), and then returning to the step S3 and the step S4.
Similarly, in step S2, when it is determined that the maximum number of working mode errors is faulty, it is determined whether the sampled voltage Vmax is too large or too small compared with the normal error range interval (amax, bmax), and the determination result is displayed and output, and then the maximum number of working mode errors is manually debugged, where Vmax > bmax is considered to be too large, and Vmin < amax is considered to be too small.
In the step S2, after entering the maximum working mode error manual debugging mode, manually debugging the potentiometer, if the sampling voltage Vmax is excessively large, manually reducing the resistance of the potentiometer, if the sampling voltage Vmax is excessively small, manually increasing the resistance of the potentiometer, feeding the regulated resistance voltage of the potentiometer back to the single chip microcomputer, correspondingly regulating the proportional valve control signal PWM value B according to the linear proportion until the sampling voltage corresponding to the value B is within the normal error range (amax, bmax), and then returning to the step S3 and the step S4.
The working range self-adaptive adjusting method of the proportional valve only needs a small amount of labor to participate in adjustment, and even if a part needing manual participation in adjustment appears, the method can know how to adjust the proportional valve by judging the relation between the sampling voltage and the normal range, the adjusting personnel do not need to adjust the sampling voltage or adjust the sampling voltage to small or large respectively to try to judge, the workload of the proportional valve is further saved, and the debugging efficiency is improved.
Example two
The present embodiment provides a gas water heater, where the gas water heater at least includes a proportional valve, and an adjustment method of the proportional valve includes a method for adaptively adjusting a working range of the proportional valve in any one of the embodiments, which is specifically described in the first embodiment and is not described herein again.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (9)
1. A working range self-adaptive adjusting method of a proportional valve is characterized by comprising the following steps:
(1) powering on and starting up the computer, and entering an adjusting mode;
(2) and the error judgment step comprises minimum working mode error judgment and maximum working mode judgment, wherein the minimum working mode error judgment comprises the following steps:
controlling a proportional valve to enter a minimum working mode, and collecting a proportional valve control signal PWM value A output by a singlechip in the current working mode;
calculating a sampling voltage Vmin corresponding to the value A, judging whether the sampling voltage Vmin is located in a normal error range (amin, bmin), if so, executing maximum number working mode error judgment, otherwise, judging that the minimum number working mode error is in fault, stopping regulation, and reporting errors;
the maximum working mode error judgment comprises the following steps:
controlling a proportional valve to enter a maximum working mode, and collecting a proportional valve control signal PWM value B output by a singlechip in the current working mode;
calculating a sampling voltage Vmax corresponding to the value B, judging whether the sampling voltage Vmax is located in a normal error range interval (amax, bmax), if so, executing the step (3), otherwise, judging that the error is a fault in a maximum working mode, stopping adjustment, and reporting an error;
(3) calculating a PWM (pulse-width modulation) adjusting range C, C = B-A of a proportional valve control signal;
(4) and N parts of the adjusting range C are divided, each adjusting unit C x 1/N corresponds to 1/N opening degree of the proportional valve, the opening degree is 1 when the proportional valve is fully opened, and N is a positive integer larger than 1.
2. The adaptive control method for the working range of the proportional valve according to claim 1,
in the step (1), after the computer is powered on and started, the computer enters an adjusting mode through a key or a dial switch.
3. The adaptive control method for the working range of the proportional valve according to claim 1, wherein in the step (2), the step of controlling the proportional valve to enter the minimum working mode is to burn to the opening of the proportional valve corresponding to the minimum load;
controlling the proportional valve into the maximum mode of operation refers to the opening of the proportional valve corresponding to the maximum load to be burned.
4. The adaptive control method for the working range of the proportional valve according to claim 1, wherein step (2) is preceded by a step of encoding a minimum number of working mode error faults and a maximum number of working mode error faults, and when the faults occur in step (2), corresponding codes are displayed to prompt a manual adjustment mode to be entered.
5. The adaptive adjusting method for the working range of the proportional valve according to any one of claims 1-4, wherein in the step (2), when the error fault of the minimum number working mode is determined, it is determined whether the sampling voltage Vmin is oversized or ultra-small compared with a normal error range (amin, bmin), and meanwhile, the determination result is displayed and output, and then the manual debugging mode for the error of the minimum number working mode is entered, wherein if Vmin > bmin, the oversized condition is met, and if Vmin < amin, the ultra-small condition is met.
6. The adaptive adjusting method for the working range of the proportional valve according to claim 5, characterized in that in step (2), after entering a minimum working mode error manual debugging mode, the potentiometer is manually debugged, if the sampling voltage Vmin is too large, the potentiometer resistance is manually adjusted to be small, if the sampling voltage Vmin is too small, the potentiometer resistance is manually adjusted to be large, the adjusted potentiometer resistance voltage is fed back to the single chip microcomputer, the proportional valve control signal PWM value A is correspondingly adjusted according to a linear proportion until the sampling voltage corresponding to the value A is within a normal error range interval (amin, bmin), and then the steps (3) and (4) are returned.
7. The adaptive regulating method for the working range of the proportional valve according to any one of claims 1-4, wherein in the step (2), when the error fault of the maximum number working mode is determined, it is determined whether the sampled voltage Vmax is too large or too small compared with the normal error range interval (amax, bmax), and the determination result is displayed and output, and then the manual debugging mode for the error of the maximum number working mode is entered, wherein if Vmax > bmax, the error is too large, and if Vmin < amax, the error is too small.
8. The adaptive adjustment method for the working range of the proportional valve according to claim 7, wherein in the step (2), after entering the manual debugging mode for the maximum working mode error, the potentiometer is manually debugged, if the sampling voltage Vmax is too large, the resistor of the potentiometer is manually adjusted to be small, if the sampling voltage Vmax is too small, the resistor of the potentiometer is manually adjusted to be large, the adjusted resistor voltage of the potentiometer is fed back to the single chip, the proportional valve control signal PWM value B is correspondingly adjusted according to the linear proportion until the sampling voltage corresponding to the value B is within the normal error range interval (amax, bmax), and then the steps (3) and (4) are returned.
9. A gas water heater comprising the adaptive adjustment method of the working range of the proportional valve according to any one of claims 1 to 8.
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| CN110081607B (en) * | 2019-03-28 | 2021-01-19 | 青岛经济技术开发区海尔热水器有限公司 | Control method and control system of gas water heater and gas water heater |
| CN111578525B (en) * | 2019-10-18 | 2021-11-16 | 华帝股份有限公司 | Calibration method of proportional valve of gas water heater |
| CN115045852A (en) * | 2021-03-09 | 2022-09-13 | 山东朗进科技股份有限公司 | Control method and control system for air conditioner air valve of railway vehicle |
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