CN110762831A - Gas water heater and wind pressure resistance control method thereof - Google Patents
Gas water heater and wind pressure resistance control method thereof Download PDFInfo
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- CN110762831A CN110762831A CN201810827046.9A CN201810827046A CN110762831A CN 110762831 A CN110762831 A CN 110762831A CN 201810827046 A CN201810827046 A CN 201810827046A CN 110762831 A CN110762831 A CN 110762831A
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- wind pressure
- water heater
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- fan
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel
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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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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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 relates to a gas water heater, which comprises a body, wherein a controller, a fan communicated with a combustion chamber, a combustion proportional valve arranged on a gas channel, a fire sensing needle arranged close to a fire grate and a wind pressure sensor arranged at an exhaust port of the body are arranged in the body, and the controller is respectively and electrically connected with the fan, the gas proportional valve, the fire sensing needle and the wind pressure sensor. The invention also relates to a wind pressure resistance control method of the gas water heater, which realizes the regulation of the rotating speed of the fan by comparing the real-time working current of the fire sensing needle with the standard working current. The judgment of the combustion influence of the external wind pressure on the gas water heater is more direct and accurate, and the combustion stability can be ensured. Meanwhile, the wind pressure resistance control method of the gas water heater realizes constant temperature control of water outlet, realizes constant temperature of the water outlet and improves user experience.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a gas water heater and a wind pressure resistance control method of the gas water heater.
Background
Gas water heaters are widely used as a common household appliance. Along with the popularization of high-rise residences, the high-rise wind pressure resistance faced by a gas water heater becomes a challenge, particularly in coastal areas, sea wind is large, and a small segment of typhoon weather exists in summer, so that the existing water heater is prone to phenomena of flameout, combustion failure in reaching a set temperature, poor smoke and the like when dealing with high wind pressure resistance conditions such as the typhoon weather in summer, the use of customers is affected, and the user experience is poor. The prior art is either not adding the anti-wind and presses the function, or carries out the anti-wind through calculating demand load and presses, and the load is the estimation data, has the deviation, can appear the not good phenomenon of constant temperature nature, influences customer's use. Chinese patent application publication No. CN107525265D (application No. 201610472797.4) discloses a "blower gas water heater using flame detection and wind speed compensation", in which a water heater is disclosed, which determines whether an exhaust port is blocked or whether external wind pressure is too large by measuring the temperature of a combustion chamber, and increases the amount of exhaust air by increasing the rotation speed of a fan when the measured temperature of the combustion chamber reaches or is higher than a certain preset value, but this scheme abandons the constant temperature performance when the wind pressure resistance function is realized, which may lead to poor user experience. In addition, when the rotation speed of the fan is increased, the amount of air entering the combustion chamber is increased, the air pressure in the combustion chamber is increased, if the opening degree of the proportional valve is kept unchanged, the gas intake amount is correspondingly reduced under the influence of the air pressure in the combustion chamber, and phenomena such as flameout, failure in fire transmission, failure in combustion to reach a set temperature, poor smoke and the like may occur.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gas water heater which can stably burn and can ensure the constant-temperature performance of outlet water and a wind pressure resistance control method thereof aiming at the prior art.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a gas water heater, includes the body, this internal fan that is provided with controller, combustion chamber, is linked together with the combustion chamber, for the gas passageway of combustion chamber supply gas, set up the gas proportional valve on the gas passageway, be used for detecting the fire needle of feeling of flame condition, the controller is connected its characterized in that with fan, gas proportional valve and sense fire needle electricity respectively: the wind pressure sensor is arranged at the air outlet of the body and is electrically connected with the controller.
In order to ensure the balance of air pressure between the air pressure in the combustion chamber and the air pressure between the air outlets of the gas proportional valves and further maintain the air inflow of the gas when the rotating speed of the fan is increased, a through pipe body is connected between the combustion chamber and the air outlets of the gas proportional valves.
The wind pressure resistance control method of the gas water heater is characterized by comprising the following steps: the method comprises the following steps:
s1, acquiring the current N of the fire sensing needle in real time, acquiring the wind pressure data P at the air outlet in real time, and acquiring the current rotating speed w of the fan in real time;
s2, calculating X to be | N-M | according to the standard current data M corresponding to the stored wind pressure data P; wherein M represents the current of the fire needle when the external wind pressure is P and the combustion of the gas water heater is not influenced;
s3, judging whether X is less than or equal to D, wherein D is a current threshold value for compensating rotation speed adjustment; if so, performing S4, otherwise performing S5;
s4, adjusting the rotating speed of the fan to
Wherein W is the adjusted fan speed data,
constant data are compensated for the rotating speed of the fan;
s5, adjusting the rotating speed of the fan to
K is a compensation coefficient corresponding to the stored wind pressure data P;
and S6, performing PID control on the outlet water temperature of the gas water heater.
In order to improve the adjustment accuracy, when X > D, whether the duration T of the time X > D exceeds the time threshold T for compensating the rotation speed adjustment is judged, if yes, S5 is carried out, and if not, S4 is returned.
Preferably, whether M is more than or equal to N and more than or equal to α is judged, if not, the fault of the gas water heater is judged, wherein α is the maximum current flowing through the fire sensing needle when wind pressure can be resisted.
In order to ensure the normal work of the gas water heater, after the gas water heater is started, a water flow signal is detected, and after the water flow signal is obtained, ignition and heating are controlled;
detecting whether the ignition is successful or not through the current of the ignition sensing needle, if the ignition is successful, performing S1, if the ignition is failed, re-igniting, and meanwhile counting the ignition times;
and if the ignition failure times exceed the set failure time threshold value, judging the fault of the gas water heater.
Preferably, after the fault of the gas water heater is judged, whether the fault of the water heater is eliminated is detected, if the fault of the water heater is eliminated, the water flow signal is detected again, and then ignition is controlled according to the water flow signal.
Compared with the prior art, the invention has the advantages that: this gas heater judges in real time whether external wind pressure is influential to the burning of gas heater according to the current data that feels the fire needle collection, so external wind pressure is directly acquireed through the change of feeling the fire needle electric current to the burning of gas heater, and is more direct accurate to the judgement of external wind pressure to the burning influence of gas heater, and then realizes the regulation to the fan wind speed, in the whole course of the work, because monitor feeling the fire needle electric current in real time, can guarantee the stability of burning. Meanwhile, the wind pressure resistance control method of the gas water heater realizes PID control on the temperature on the basis of adjusting the rotating speed of the fan, realizes constant temperature control on the outlet water, ensures the constant temperature of the outlet water and improves the user experience.
Drawings
Fig. 1 is a schematic view of the internal structure of a gas water heater according to an embodiment of the present invention.
Fig. 2 is an electrical block diagram of a gas water heater in an embodiment of the invention.
FIG. 3 is a flow chart of a wind pressure resistance control method for a gas water heater according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 and 2, the gas water heater of the present embodiment includes a body 1. This body 1 can adopt current general gas heater structure, wherein has combustion chamber 3, fire row 7, gas channel 5, fan 4 in this body 1, feels fire needle 6, and fire row 7 is installed on combustion chamber 3, and gas channel 5 is linked together with combustion chamber 3, and combustion chamber 3 still communicates and is provided with the wind channel, and fan 4 sets up in the wind channel. The air outlet of the combustion chamber 3 is also provided with a wind pressure sensor 9, the gas channel 5 is provided with a gas proportional valve 51, and the fire sensing needle 6 is positioned near the fire grate 7 and used for detecting the flame condition of the fire grate 7. The body 1 is also internally provided with a controller 2, and the controller 2 is respectively electrically connected with the fan 4, the gas proportional valve 51, the fire sensing needle 6 and the wind pressure sensor 9.
In the present embodiment, a through pipe 8 is connected between the combustion chamber 3 and the outlet of the gas proportional valve 51. Install this body 8 intercommunication in this embodiment between 7 tops and the gas proportional valve 51 gas outlets of fire row of combustion chamber 3, this body 8 can guarantee that the atmospheric pressure in the combustion chamber 3 is balanced with the atmospheric pressure of gas proportional valve 51 gas outlets, alleviates when increasing the fan 4 rotational speed, and the proportional valve electric current keeps getting into the phenomenon that the gas reduces in the combustion chamber 3 under the unchangeable circumstances. When the air pressures on the two sides are balanced, after the rotating speed of the fan 4 is increased, the air pressure in the combustion chamber 3 is still in a balanced state, the current of the proportional valve is unchanged, and the air input is also kept unchanged, so that the phenomena of flameout, fire transmission failure, incapability of reaching a set temperature during combustion, poor smoke and the like can be avoided, and the constant temperature performance can be better realized.
When the water heater works, the controller 2 acquires the working current of the fire sensing needle 6 and the wind pressure data of the wind pressure sensor 9 in real time, so that the influence of external wind pressure on the combustion condition of the gas water heater is judged, the fan 4 is controlled in real time according to the influence condition, normal work in the combustion chamber 3 is guaranteed, and the constant temperature performance of the outlet water temperature is guaranteed.
As shown in fig. 3, the wind pressure resistance control method for a gas water heater in the present embodiment includes the following steps:
s0, after the gas water heater is started, the water flow signal is detected through the controller 2, and after the water flow signal is obtained, the controller 2 controls ignition and heating;
detecting whether the ignition is successful or not through the current of the ignition sensing needle 6, if the ignition is successful, performing S1, if the ignition is failed, re-igniting, and meanwhile counting the ignition times;
if the ignition failure times exceed a set failure time threshold value, judging that the gas water heater has a fault;
after the fault of the gas water heater is judged, whether the fault of the water heater is eliminated or not is detected, if the fault of the water heater is eliminated, the water flow signal is detected again, and then ignition is controlled according to the water flow signal;
s1, acquiring the current N of the fire sensing needle 6 in real time, acquiring the wind pressure data P at the air outlet in real time, and acquiring the current rotating speed w of the fan 4 in real time;
s2, before the gas water heater leaves a factory, standard current data corresponding to various wind pressure data are stored in the controller 2, wherein the standard current data represent the current of the fire sensing needle 6 when external wind pressure has no influence on the combustion of the gas water heater, in an experimental stage, the current value of the fire sensing needle 6 when the external wind pressure has no influence on the combustion of the gas water heater is collected, and then the standard current data corresponding to a certain wind pressure data is obtained according to average calculation;
calculating X ═ N-M |, according to standard current data M corresponding to the stored wind pressure data P; wherein M represents the current of the fire sensing needle 6 when the external wind pressure is P and the combustion of the gas water heater is not influenced; when the standard current data M and the real-time current N of the fire sensing needle 6 have a difference value, namely the combustion of the gas water heater is interfered by external wind pressure, corresponding rotational speed compensation of the fan 4 is carried out according to the detected current deviation value, so that the actual current of the fire sensing needle 6 finally reaches the standard current data or a standard current interval corresponding to the standard current data;
meanwhile, whether M is more than or equal to N is judged to be more than or equal to α, if not, the fault of the gas water heater is judged, wherein α is the maximum current which can flow through the fire sensing needle 6 when wind pressure can be resisted, and if so, S3 is carried out;
s3, determining whether X is less than or equal to D, where D is a current threshold for compensating for the rotation speed adjustment, and in this embodiment, D is 10 μ a; if so, performing S4, otherwise performing S5;
s4, adjusting the rotating speed of the fan 4 toWherein W is the adjusted rotational speed data of the fan 4,constant data are compensated for the rotational speed of the fan 4,a nominal value obtained for the experimental phase;
s5, judging whether the duration T when X is larger than D exceeds the time threshold T for compensating the rotation speed adjustment, if so, adjusting the rotation speed of the fan 4 to be equal to
K is a compensation coefficient corresponding to the stored wind pressure data P, and K is a constant value obtained by testing in an experimental stage; in the embodiment, T is 10 s;
if not, go to S4;
and S6, performing PID control on the outlet water temperature of the gas water heater.
This gas heater in-process of work judges whether there is the wind pressure to the external world according to the morphism change of flame, judges the influence of external wind pressure to flame through feeling fire needle 6 electric current promptly. And then through improving the 4 rotational speeds of direct current fan, reach the effect of anti-wind pressure, guarantee simultaneously through body 8 that the atmospheric pressure in the combustion chamber 3 is balanced with the atmospheric pressure of gas proportional valve 51 gas outlet mutually, and then can ensure that the external world has stable burning and go out water constant temperature performance when wind pressure and be guaranteed. Namely, the wind pressure resistant work of the gas water heater is realized through the structural improvement and the improvement of the control method. In the process, the current of the fire sensing needle 6 is intuitive feedback of the flame form, whether the external wind pressure influences the combustion or not is judged more directly and accurately by detecting the current of the fire sensing needle 6, and the adjusting effect is better.
Claims (7)
1. The utility model provides a gas water heater, includes body (1), be provided with controller (2), combustion chamber (3) in body (1), fan (4) that are linked together with combustion chamber (3), for gas passage (5) of combustion chamber (3) supply gas, set up gas proportional valve (51) on gas passage (5), be used for detecting flame status feel fire needle (6), controller (2) are connected its characterized in that with fan (4), gas proportional valve (51) and feel fire needle (6) electricity respectively: the wind pressure sensor is characterized by further comprising a wind pressure sensor (9) arranged at the air outlet of the body (1), wherein the wind pressure sensor (9) is electrically connected with the controller (2).
2. The gas water heater of claim 1, wherein: and a through pipe body (8) is connected between the combustion chamber (3) and the gas outlet of the gas proportional valve (51).
3. The wind pressure resistance control method of the gas water heater is characterized by comprising the following steps: the method comprises the following steps:
s1, acquiring the current N of the fire sensing needle (6) in real time, acquiring the wind pressure data P at the air outlet in real time, and acquiring the current rotating speed w of the fan (4) in real time;
s2, calculating X to be | N-M | according to the standard current data M corresponding to the stored wind pressure data P; wherein M represents the current of the fire sensing needle (6) when the external wind pressure is P and the combustion of the gas water heater is not influenced;
s3, judging whether X is less than or equal to D, wherein D is a current threshold value for compensating rotation speed adjustment; if so, performing S4, otherwise performing S5;
s4, adjusting the rotating speed of the fan (4) toWherein W is the adjusted rotating speed data of the fan (4),
constant data are compensated for the rotating speed of the fan (4);
s5, adjusting the rotating speed of the fan (4) to
K is a compensation coefficient corresponding to the stored wind pressure data P;
and S6, performing PID control on the outlet water temperature of the gas water heater.
4. The wind pressure resistance control method of the gas water heater according to claim 3, characterized in that:
and when X is larger than D, judging whether the duration time T of X is larger than D for the second time exceeds the time threshold value T for compensating the rotation speed adjustment, if so, performing S5, and otherwise, returning to S4.
5. The wind pressure resistance control method of the gas water heater according to claim 3, characterized by judging whether M is more than or equal to N and more than or equal to α, and if not, judging that the gas water heater has a fault, wherein α is the maximum current flowing through the fire sensing needle (6) when the wind pressure can be resisted.
6. The wind pressure resistance control method of the gas water heater according to claim 3, characterized in that: after the gas water heater is started, detecting a water flow signal, and after the water flow signal is obtained, controlling ignition and heating;
detecting whether the ignition is successful or not through the current of the ignition sensing needle (6), if the ignition is successful, performing S1, and if the ignition is failed, re-performing the ignition, and meanwhile, counting the ignition times;
and if the ignition failure times exceed the set failure time threshold value, judging the fault of the gas water heater.
7. The wind pressure resistance control method of the gas water heater according to claim 6, characterized in that: and after the fault of the gas water heater is judged, detecting whether the fault of the water heater is eliminated, if so, detecting the water flow signal again, and controlling ignition according to the water flow signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810827046.9A CN110762831A (en) | 2018-07-25 | 2018-07-25 | Gas water heater and wind pressure resistance control method thereof |
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| CN201810827046.9A CN110762831A (en) | 2018-07-25 | 2018-07-25 | Gas water heater and wind pressure resistance control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623525A (en) * | 2020-06-16 | 2020-09-04 | 珠海格力电器股份有限公司 | Gas water heater, control method thereof and computer-readable storage medium |
| CN112923571A (en) * | 2021-02-23 | 2021-06-08 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
| CN113514221A (en) * | 2020-04-10 | 2021-10-19 | 宁波方太厨具有限公司 | Automatic wind pressure resistance testing method for gas water heater |
-
2018
- 2018-07-25 CN CN201810827046.9A patent/CN110762831A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514221A (en) * | 2020-04-10 | 2021-10-19 | 宁波方太厨具有限公司 | Automatic wind pressure resistance testing method for gas water heater |
| CN113514221B (en) * | 2020-04-10 | 2022-05-17 | 宁波方太厨具有限公司 | Automatic wind pressure resistance testing method for gas water heater |
| CN111623525A (en) * | 2020-06-16 | 2020-09-04 | 珠海格力电器股份有限公司 | Gas water heater, control method thereof and computer-readable storage medium |
| CN111623525B (en) * | 2020-06-16 | 2024-03-19 | 珠海格力电器股份有限公司 | Gas water heater, control method thereof and computer readable storage medium |
| CN112923571A (en) * | 2021-02-23 | 2021-06-08 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
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