CN110186194B - Control method for self-adaptive wind pressure of gas water heater - Google Patents
Control method for self-adaptive wind pressure of gas water heater Download PDFInfo
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- CN110186194B CN110186194B CN201810394661.5A CN201810394661A CN110186194B CN 110186194 B CN110186194 B CN 110186194B CN 201810394661 A CN201810394661 A CN 201810394661A CN 110186194 B CN110186194 B CN 110186194B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003044 adaptive effect Effects 0.000 claims description 12
- 238000009530 blood pressure measurement Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The invention discloses a control method of self-adaptive wind pressure for a gas water heater, which is characterized in that the corresponding relation between the current value of a proportional valve and the pressure taking value of a wind pressure sensor is preset, and at least one current compensation interval is divided by the current of a fan from small to large, wherein each current compensation interval corresponds to a target pressure value; when the controller is started, the controller selects a certain proportional valve current value corresponding to the pressure value of the wind pressure sensor from the corresponding relation between the proportional valve current value of the gas water heater and the pressure value of the wind pressure sensor as an initial target regulation pressure, and the fan works with the initial current; and then, when the controller determines that the pressure value of the external wind pressure detected by the wind pressure sensor changes with a preset reference, the controller compensates the current of the fan. The invention can adjust the rotating speed of the fan according to the change of the wind pressure in real time and always ensure the air required by the normal operation of the gas water heater.
Description
Technical Field
The invention belongs to the technical field of gas water heaters, and particularly relates to a control method for self-adaptive air pressure of a gas water heater.
Background
During the operation of the household gas instantaneous water heater, smoke generated by gas combustion has certain harm to human bodies, so the smoke needs to be discharged outdoors in time; in the relevant standards of household gas water heaters, the wind pressure of the gas water heater is definitely specified to be more than 80Pa, so that the gas water heater can normally burn and discharge smoke when certain external wind flows backwards. However, in an actual use environment, particularly for high-rise residents, the external wind pressure is larger and unstable, when the external wind flows backwards to a certain degree, the fan capacity is not enough to provide air required by normal combustion, the smoke exceeds the standard, and the normal use of the gas water heater is influenced.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method for controlling adaptive wind pressure for a gas water heater.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides a control method for self-adaptive wind pressure of a gas water heater, which comprises the following steps: presetting a corresponding relation between a proportional valve current value and a pressure taking value of a wind pressure sensor, dividing a fan current into at least one current compensation interval from small to large, wherein each current compensation interval corresponds to a target pressure value;
when the controller is started, the controller selects a certain proportional valve current value corresponding to the pressure value of the wind pressure sensor from the corresponding relation between the proportional valve current value of the gas water heater and the pressure value of the wind pressure sensor as an initial target regulation pressure, and the fan works with the initial current; and then, when the controller determines that the pressure value of the external wind pressure detected by the wind pressure sensor changes with a preset reference, the controller compensates the current of the fan.
In the above scheme, during the start-up, the controller selects a certain proportional valve current value to correspond to the pressure value of the wind pressure sensor as the initial target regulation pressure in the proportional valve current value of the gas water heater and the pressure value corresponding relationship of the wind pressure sensor, specifically: and at each fire row working section of the gas water heater, determining a corresponding relation curve of the pressure taking value of the wind pressure sensor under the optimal working condition of the gas water heater according to the proportional valve current values under different loads, fitting the corresponding relation curve according to a fitting function to obtain at least one proportional valve current interval, and when the gas water heater is started, selecting the pressure taking value of one proportional valve current value corresponding to the wind pressure sensor in the at least one proportional valve current interval as an initial target regulation pressure by the controller.
In the above scheme, when the corresponding relation between the current value of the proportional valve and the voltage taking value of the wind pressure sensor is preset and the current of the fan is divided into at least two current compensation intervals from small to large, the fan works in the minimum current compensation interval of the at least two current compensation intervals.
In the above-mentioned scheme, when the controller confirms that the pressure value of getting that the wind pressure sensor detected external wind pressure changes with predetermineeing between the benchmark, the controller compensates fan current, specifically is: when the controller determines that the pressure taking value of the external wind pressure detected by the wind pressure sensor is larger than the target pressure value corresponding to any one current compensation interval, the controller selects the current compensation interval larger than the current compensation interval and compensates by using the fan current corresponding to the high compensation current compensation interval.
In the above scheme, the dividing of the fan current into at least two current compensation intervals from small to large specifically includes: dividing the fan current into at least two current compensation intervals from the initial fan current to the maximum fan current, wherein the target pressure value corresponding to the initial fan current is the initial target adjusting pressure; and an overlapping area is arranged in an adjacent area between the at least two current compensation areas and is used as a return difference area.
In the above scheme, the method further comprises: when the controller selects the maximum current compensation interval according to the pressure taking value of the external wind pressure detected by the wind pressure sensor, if the external wind pressure is too large and the pressure taking value of the wind pressure sensor is reduced to an alarm pressure threshold value and is maintained for several seconds, the controller carries out fault alarm processing; the alarm pressure threshold is lower than the initial target regulation pressure.
In the above scheme, when the corresponding relationship between the current value of the proportional valve and the voltage taking value of the wind pressure sensor is preset and the fan current is divided into at least two current compensation intervals from small to large, the fan works with the minimum fan current in the corresponding relationship between the fan current and the target pressure value under the condition of no external wind pressure.
In the above-mentioned scheme, when the controller confirms that the pressure value of getting that the wind pressure sensor detected external wind pressure changes with predetermineeing between the benchmark, the controller compensates fan current, specifically is: when the controller determines that the pressure taking value of the external wind pressure detected by the wind pressure sensor is matched with a certain target pressure value in the corresponding relation between the fan current and the target pressure value, the controller selects the fan current corresponding to the target pressure value to compensate.
In the above scheme, the presetting of the corresponding relationship between the fan current and the target pressure value specifically includes: sequentially corresponding fan current to a target pressure value from initial fan current to maximum fan current, wherein the target pressure value corresponding to the initial fan current is initial target regulation pressure; and determining a target pressure value corresponding to each fan current according to a functional relation P (K x If + C), wherein P is the target pressure value under the fixed load, the unit is Pa, If is the fan current, C is a constant, and K is a proportionality coefficient.
In the above scheme, the method further comprises: and when the controller selects the maximum fan current in the corresponding relation between the fan current and the target pressure value according to the pressure taking value of the external wind pressure detected by the wind pressure sensor and maintains the maximum fan current for several seconds, the controller carries out fault alarm processing.
Compared with the prior art, the invention monitors the influence of the external wind pressure change on the combustion condition of the gas water heater in real time through the wind pressure sensor, can adjust the rotating speed of the fan according to the wind pressure change in real time, and always ensures the air required by the normal operation of the gas water heater; can be suitable for various strong wind and high-rise environments.
Drawings
Fig. 1 is a flowchart of a control method of a gas water heater with adaptive wind pressure according to embodiment 1 of the present invention;
FIG. 2 is a curve of the corresponding relationship between the proportional valve current value determination under different loads and the pressure measurement value of the wind pressure sensor under the optimal working condition of the gas water heater;
FIG. 3 is a corresponding relationship diagram of three current compensation intervals which are divided into a fan current from small to large;
fig. 4 is a flowchart of a control method of a gas water heater with adaptive wind pressure according to embodiment 2 of the present invention;
fig. 5 is a diagram showing the correspondence relationship between the fan current and the pressure value of the wind pressure sensor from small to large.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Embodiment 1 of the present invention provides a control method for a gas water heater based on adaptive wind pressure, as shown in fig. 1, the method is implemented by the following steps:
step 101: presetting a corresponding relation between a current value of a proportional valve and a pressure value of a wind pressure sensor and a corresponding relation between a current of a fan and a target pressure value;
specifically, in each fire row working section of the gas water heater, a corresponding relation curve (shown in fig. 2) of the pressure taking value of the wind pressure sensor under the optimal working condition of the gas water heater is determined according to the proportional valve current values under different loads, and the corresponding relation curve is fitted according to a fitting function to obtain at least one proportional valve current interval.
Taking fitting of three proportional valve current intervals as an example, as shown in fig. 2, a corresponding relation curve of the pressure measurement value of the wind pressure sensor determined according to the proportional valve current values under different loads is a curve part in fig. 2, and three proportional valve current intervals are formed according to P ═ k × Ib + c, I1< Ib < I2, P ═ k1 × Ib + c1, I2< Ib < I3, P ═ k2 × Ib + c2, I3< Ib < I4 fitting, and are three oblique lines in fig. 2, wherein P is the pressure measurement value of the wind pressure sensor, Ib, I1, I2, I3, I4 are proportional valve current values c, c1, and c2 are constants.
As shown in fig. 3, the dividing of the fan current into at least two current compensation intervals from small to large specifically includes: dividing the fan current into at least two current compensation intervals from the initial fan current to the maximum fan current, wherein the target pressure value corresponding to the initial fan current is the initial target adjusting pressure.
And an overlapping area is arranged in an adjacent area between the at least two current compensation areas and is used as a return difference area, so that frequent switching between the boundaries of the two current compensation areas in the control process is prevented, and the control stability is improved.
Taking fig. 3 as an example, the initial fan current If1 to the maximum fan current If6 is [ If1, If3 ]),
[ If2, If5], [ If4, If6], wherein [ If1, If3] corresponds to a target pressure value P4, [ If2, If5] corresponds to a target pressure value P5, [ If4, If6] corresponds to a target pressure value P6.
Under the condition that the external wind pressure of the gas water heater is small, the fan current is [ If1, If3], the constant target pressure value is P4, under the condition that the external wind pressure of the water heater is large, the fan current is [ If2, If5], the constant target pressure value is P5, and under the condition that the external wind pressure of the water heater is large, the fan current is
[ If4, If6], wherein the constant target pressure value is P6, wherein [ If2, If3], [ If4, If5] is the return difference interval of the switching set pressure values, stability is enhanced. The selection of P4, P5 and P6 is reasonably selected according to the actual compensation working condition of the gas water heater.
Step 102: when the controller is started, the controller selects a certain proportional valve current value corresponding to the pressure value of the wind pressure sensor from the corresponding relation between the proportional valve current value of the gas water heater and the pressure value of the wind pressure sensor as an initial target regulation pressure, and the fan works in a minimum current compensation interval.
Specifically, when the proportional valve is started, the controller selects a pressure value of the wind pressure sensor corresponding to one proportional valve current value in the at least one proportional valve current interval as an initial target regulation pressure.
Step 103: when the controller determines that the pressure taking value of the external wind pressure detected by the wind pressure sensor is larger than the target pressure value corresponding to any one current compensation interval, the controller selects the current compensation interval larger than the current compensation interval and compensates by using the fan current corresponding to the high compensation current compensation interval.
Specifically, if the controller detects that the voltage taking value of the external wind pressure is smaller than the target pressure value corresponding to any one current compensation interval and the current compensation interval is not the minimum current compensation interval, the controller selects the target pressure value smaller than the current compensation interval to adjust the current of the fan.
And if the controller detects that the voltage taking value of the external wind pressure is smaller than the target pressure value corresponding to any one current compensation interval and the current compensation interval is the minimum current compensation interval, the controller does not adjust the current of the fan.
Further, after the controller selects the maximum current compensation interval according to the pressure value of the external wind pressure detected by the wind pressure sensor, if the external wind pressure is too large and the pressure value of the wind pressure sensor is reduced to an alarm pressure threshold value and is maintained for several seconds, the controller performs fault alarm processing; the alarm pressure threshold is lower than the initial target regulation pressure.
Specifically, as shown in fig. 3, P7 is the alarm pressure threshold.
Example 2
Embodiment 2 of the present invention provides a control method for a gas water heater based on adaptive wind pressure, as shown in fig. 4, the method is implemented by the following steps:
step 201: presetting a corresponding relation between a current value of a proportional valve and a pressure value of a wind pressure sensor and a corresponding relation between a current of a fan and a target pressure value;
specifically, in each fire row working section of the gas water heater, a corresponding relation curve (shown in fig. 2) of the pressure taking value of the wind pressure sensor under the optimal working condition of the gas water heater is determined according to the proportional valve current values under different loads, and the corresponding relation curve is fitted according to a fitting function to obtain at least one proportional valve current interval.
Taking fitting of three proportional valve current intervals as an example, as shown in fig. 2, a corresponding relation curve of the pressure measurement value of the wind pressure sensor determined according to the proportional valve current values under different loads is a curve part in fig. 2, and three proportional valve current intervals are formed according to P ═ k × Ib + c, I1< Ib < I2, P ═ k1 × Ib + c1, I2< Ib < I3, P ═ k2 × Ib + c2, I3< Ib < I4 fitting, and are three oblique lines in fig. 2, wherein P is the pressure measurement value of the wind pressure sensor, Ib, I1, I2, I3, I4 are proportional valve current values c, c1, and c2 are constants.
The preset corresponding relation between the fan current and the target pressure value specifically comprises the following steps: sequentially corresponding fan current to a target pressure value from initial fan current to maximum fan current, wherein the target pressure value corresponding to the initial fan current is initial target regulation pressure; determining a target pressure value corresponding to each fan current according to a functional relation P (K x If + C), wherein P is the target pressure value under a fixed load, the unit is Pa, If is the fan current, C is a constant, and K is a proportionality coefficient; in order to ensure the stability of the system, K takes a decimal number between [0 and 1 ].
Taking fig. 5 as an example, the initial fan current If1 to the maximum fan current If6 correspond to the target pressure values P8 to P9, and P8 to P9 are gradually increased.
Step 202: when the controller is started, the controller selects a certain proportional valve current value corresponding to the pressure value of the wind pressure sensor from the corresponding relationship between the proportional valve current value of the gas water heater and the pressure value of the wind pressure sensor as initial target regulation pressure, and the fan works by the minimum fan current in the corresponding relationship between the fan current and the target pressure value under the condition of no external wind pressure.
Specifically, when the proportional valve is started, the controller selects a pressure value of the wind pressure sensor corresponding to one proportional valve current value in the at least one proportional valve current interval as an initial target regulation pressure.
The acquisition process of the corresponding relation between the fan current and the target pressure value under the condition of no external wind pressure is as follows: when the controller is used for presetting that no external wind pressure exists, a certain fixed water heater proportional valve current value Ib corresponds to a fan rotating speed VF (at the moment, the smoke and the heat efficiency are in the optimal state), and each fan rotating speed VF corresponds to a fan current, namely the corresponding relation between the fan current and a target pressure value under the condition of no external wind pressure exists.
Further, the fan operates with the minimum fan current in the corresponding relationship between the fan current and the target pressure value under the condition of no external wind pressure, or any one of the corresponding relationships between the fan current and the target pressure value under the condition of no external wind pressure can be selected as the initial fan current to drive the fan to operate.
Step 203: when the controller determines that the pressure taking value of the external wind pressure detected by the wind pressure sensor is matched with a certain target pressure value in the corresponding relation between the fan current and the target pressure value, the controller selects the fan current corresponding to the target pressure value to compensate.
Specifically, if the controller detects that the voltage taking value of the external wind pressure is smaller than the target pressure value corresponding to any one current compensation interval and the current compensation interval is not the minimum current compensation interval, the controller selects the target pressure value smaller than the current compensation interval to adjust the current of the fan.
And if the controller detects that the voltage taking value of the external wind pressure is smaller than the target pressure value corresponding to any one current compensation interval and the current compensation interval is the minimum current compensation interval, the controller does not adjust the current of the fan.
Further, when the controller selects the maximum fan current in the corresponding relation between the fan current and the target pressure value according to the pressure value of the external wind pressure detected by the wind pressure sensor and maintains the maximum fan current for several seconds, the controller performs fault alarm processing.
Of course, the wind pressure sensors described in embodiments 1 and 2 may also adopt other sensors or sensing devices for monitoring and obtaining the external wind pressure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (9)
1. A control method for self-adaptive wind pressure of a gas water heater is characterized by comprising the following steps: presetting a corresponding relation between a proportional valve current value and a pressure taking value of a wind pressure sensor, dividing a fan current into at least one current compensation interval from small to large, wherein each current compensation interval corresponds to a target pressure value;
when the controller is started, the controller selects a certain proportional valve current value corresponding to the pressure value of the wind pressure sensor from the corresponding relation between the proportional valve current value of the gas water heater and the pressure value of the wind pressure sensor as an initial target regulation pressure, and the fan works with the initial current; then, when the controller determines that the change between the voltage taking value of the external wind pressure detected by the wind pressure sensor and a preset reference occurs, the controller compensates the current of the fan;
during the start-up, the controller selects the pressure value that a certain proportion valve current value corresponds to the wind pressure sensor as the initial target regulation pressure in the proportion valve current value of gas heater and the pressure value corresponding relation of wind pressure sensor, specifically is: and at each fire row working section of the gas water heater, determining a corresponding relation curve of the pressure taking value of the wind pressure sensor under the optimal working condition of the gas water heater according to the proportional valve current values under different loads, fitting the corresponding relation curve according to a fitting function to obtain at least one proportional valve current interval, and when the gas water heater is started, selecting the pressure taking value of one proportional valve current value corresponding to the wind pressure sensor in the at least one proportional valve current interval as an initial target regulation pressure by the controller.
2. The adaptive wind pressure control method for a gas water heater according to claim 1, wherein when the preset proportional valve current value and the corresponding relation of the pressure value of the wind pressure sensor are obtained and the fan current is divided into at least two current compensation intervals from small to large, the fan operates with the smallest current compensation interval of the at least two current compensation intervals.
3. The method for controlling adaptive wind pressure of a gas water heater according to claim 2, wherein when the controller determines that the wind pressure sensor detects a change between the pressure value of the external wind pressure and a preset reference, the controller compensates the fan current, specifically: when the controller determines that the pressure taking value of the external wind pressure detected by the wind pressure sensor is larger than the target pressure value corresponding to any one current compensation interval, the controller selects the current compensation interval larger than the current compensation interval and compensates by using the fan current corresponding to the high compensation current compensation interval.
4. The control method for the adaptive wind pressure of the gas water heater according to claim 3, wherein the fan current is divided into at least two current compensation intervals from small to large, specifically: dividing the fan current into at least two current compensation intervals from the initial fan current to the maximum fan current, wherein the target pressure value corresponding to the initial fan current is the initial target adjusting pressure; and an overlapping area is arranged in an adjacent area between the at least two current compensation areas and is used as a return difference area.
5. The control method of adaptive wind pressure for gas water heater according to claim 4, further comprising: when the controller selects the maximum current compensation interval according to the pressure taking value of the external wind pressure detected by the wind pressure sensor, if the external wind pressure is too large and the pressure taking value of the wind pressure sensor is reduced to an alarm pressure threshold value and is maintained for several seconds, the controller carries out fault alarm processing; the alarm pressure threshold is lower than the initial target regulation pressure.
6. The adaptive wind pressure control method for a gas water heater according to claim 1, wherein when the corresponding relationship between the proportional valve current value and the pressure taking value of the wind pressure sensor is preset and the fan current is divided into at least two current compensation sections from small to large, the fan operates with the minimum fan current in the corresponding relationship between the fan current without external wind pressure and the target pressure value.
7. The method as claimed in claim 6, wherein when the controller determines that the wind pressure sensor detects a change between the pressure value of the external wind pressure and a preset reference, the controller compensates the fan current, specifically: when the controller determines that the pressure taking value of the external wind pressure detected by the wind pressure sensor is matched with a certain target pressure value in the corresponding relation between the fan current and the target pressure value, the controller selects the fan current corresponding to the target pressure value to compensate.
8. The adaptive wind pressure control method for a gas water heater according to claim 7, wherein the fan current is divided into at least one current compensation interval from small to large, and each current compensation interval corresponds to a target pressure value, specifically: sequentially corresponding fan current to a target pressure value from initial fan current to maximum fan current, wherein the target pressure value corresponding to the initial fan current is initial target regulation pressure; and determining a target pressure value corresponding to each fan current according to a functional relation P = K x If + C, wherein P is the target pressure value under the fixed load, the unit is Pa, If is the fan current, C is a constant, and K is a proportionality coefficient.
9. The control method of adaptive wind pressure for gas water heater according to claim 8, further comprising: and when the controller selects the maximum fan current in the corresponding relation between the fan current and the target pressure value according to the pressure taking value of the external wind pressure detected by the wind pressure sensor and maintains the maximum fan current for several seconds, the controller carries out fault alarm processing.
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| CN110953709B (en) * | 2019-11-08 | 2021-09-03 | 威能(无锡)供热设备有限公司 | Gas water heating equipment |
| CN112524636A (en) * | 2020-11-30 | 2021-03-19 | 芜湖美的厨卫电器制造有限公司 | Control method and device of gas water heater, gas water heater and storage medium |
| CN114963495B (en) * | 2021-06-23 | 2023-07-14 | 青岛经济技术开发区海尔热水器有限公司 | Upward-pumping type direct-current fan gas water heater and control method thereof |
| CN114811958B (en) * | 2022-02-18 | 2024-03-15 | 广东万和热能科技有限公司 | Control method, device and equipment of wall-mounted furnace and computer readable storage medium |
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| KR100704712B1 (en) * | 2005-09-22 | 2007-04-09 | 주식회사 경동나비엔 | Multi air proportionality type gas boiler |
| CN202158666U (en) * | 2011-07-07 | 2012-03-07 | 海尔集团公司 | Internal pressure feedback regulation system of gas water heater |
| CN104729101B (en) * | 2015-01-26 | 2017-06-30 | 艾欧史密斯(中国)热水器有限公司 | Gas heater or wall-hung boiler combustion control system and its control method |
| CN105222362B (en) * | 2015-10-29 | 2018-03-16 | 艾欧史密斯(中国)热水器有限公司 | The control system of gas-fired water heater |
| CN106225249B (en) * | 2016-08-31 | 2020-04-24 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and safety control system and method thereof |
| CN106885378B (en) * | 2017-03-31 | 2020-09-25 | 广东万和新电气股份有限公司 | Wind pressure resistant control system of gas water heater |
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