CN106940090B - Gas water heater control system adjusted according to secondary pressure of gas - Google Patents
Gas water heater control system adjusted according to secondary pressure of gas Download PDFInfo
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- CN106940090B CN106940090B CN201710182246.9A CN201710182246A CN106940090B CN 106940090 B CN106940090 B CN 106940090B CN 201710182246 A CN201710182246 A CN 201710182246A CN 106940090 B CN106940090 B CN 106940090B
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- secondary pressure
- gas
- main controller
- fuel gas
- proportional valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000007789 gas Substances 0.000 claims abstract description 83
- 239000002737 fuel gas Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
The invention discloses a gas water heater control system regulated according to gas secondary pressure, comprising: the system comprises a main controller, a secondary pressure sensor, a fuel gas proportional valve and an operation display, wherein the secondary pressure sensor is connected with the main controller, is arranged behind a square pipe two-way switch stop valve function and is used for detecting fuel gas secondary pressure, and fuel gas secondary pressure values corresponding to different load states of a fuel gas water heater are stored in the main controller; under a certain load state, when the secondary pressure is detected to be too high, the main controller controls the opening degree of the fuel gas proportional valve to be reduced, when the secondary pressure is detected to be too low, the main controller controls the opening degree of the fuel gas proportional valve to be increased, and when the secondary pressure is not detected, a user is prompted whether to open the fuel gas valve or not through an operation display. The secondary pressure sensor is only added after the function of the square pipe two-way switch stop valve, so that a new fault point of a new device is prevented from being introduced, and the effective closing of the gas passage can be ensured when gas leakage occurs in unexpected situations.
Description
Technical Field
The invention relates to the technical field of gas water heater control, in particular to a gas water heater control system regulated according to gas secondary pressure.
Background
The parameters of the existing gas water heater are tested according to laboratory test data or calculated to obtain the maximum gas consumption and the minimum gas consumption of the gas water heater. The opening degree and the corresponding current value of the fuel gas proportional valve are determined through testing, but the coil resistance of the fuel gas proportional valve and the output current of the main board are all fluctuated, so that abnormal fluctuation of the output gas consumption is caused, and resonance or incomplete combustion and other conditions are easy to cause. If the user's home gas pressure is reduced, the user cannot sense that the gas pressure is low and adjust the gas pressure, so that the preset temperature cannot be reached when the gas pressure is too low. In addition, when the existing gas water heater is produced, parameter codes are required to be adjusted and calibrated manually, when the manual adjustment error is large, the influence on comfort and the whole machine work is large, and noise, vibration, temperature overshoot and the like often occur.
The Chinese patent application with publication number CN105605796A is a gas self-adaptive gas water heater and a control method thereof, wherein the gas water heater comprises a burning fire grate, a fire grate switching valve, a gas proportional valve, a total gas switching valve, a fan, a primary pressure sensor, a secondary pressure sensor, a controller and a gas pipeline; the fire exhaust switching valve, the fuel gas proportional valve and the total fuel gas switching valve are sequentially arranged on the fuel gas pipeline from top to bottom; the primary pressure sensor is arranged on a fuel gas pipeline between the total fuel gas switching valve and the fuel gas inlet, and the secondary pressure sensor is arranged on the fuel gas pipeline between the fuel gas proportional valve and the fire exhaust switching valve; the controller is provided with a display. The invention can automatically correct the deviation of the proportional valve to make the combustion condition more stable, although the water heater can automatically sense the change condition of the gas pressure. However, in the specific control process, a primary pressure sensor is needed to be relied on, and whether the gas pressure is higher or lower is detected by the primary pressure sensor to carry out display judgment. The primary pressure sensor is arranged before the main switch valve, so that the gas leakage risk is increased, and even the gas passage cannot be effectively closed when the gas leakage occurs under the unexpected condition, so that potential safety hazards exist.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a gas water heater control system which has the advantages of simple structure, convenient control and safe and comfortable use.
In order to achieve the above purpose, the invention adopts the following technical scheme.
A gas water heater control system that adjusts according to a gas secondary pressure, comprising: the system comprises a main controller, a secondary pressure sensor, a fuel gas proportional valve and an operation display, wherein the secondary pressure sensor is connected with the main controller, is arranged behind a square pipe two-way switch stop valve function and is used for detecting fuel gas secondary pressure, and fuel gas secondary pressure values corresponding to different load states of a fuel gas water heater are stored in the main controller; under a certain load state, when the secondary pressure is detected to be too high, the main controller controls the opening degree of the fuel gas proportional valve to be reduced, and when the secondary pressure is too low, the main controller controls the opening degree of the fuel gas proportional valve to be increased, so that the secondary pressure value is restored to the secondary pressure value corresponding to the current load state; when the secondary pressure is not detected, the user is prompted by operating the display whether to open the gas valve.
As an improvement, a water proportional valve is connected to the main controller, and is used for controlling the water flow of the gas water heater; when the secondary pressure is too low, if the opening of the fuel gas proportional valve is increased to the maximum value, the secondary pressure value can not be restored to the secondary pressure value corresponding to the current load state, and the main controller controls the opening of the water proportional valve to be reduced.
As an improvement, a temperature sensor is connected to the main controller, the temperature sensor is used for detecting the outlet water temperature of the gas water heater, and the set outlet water temperature is stored in the main controller; in the water using process, when the outlet water temperature detected by the temperature sensor is lower than a set value, the main controller judges whether the outlet water temperature set value can be reached when the maximum load is judged, if not, the opening of the water proportional valve is controlled to be reduced, and if so, the load is increased.
As an improvement, the secondary pressure sensor mounting structure is: the pipe wall penetrating through the gas secondary pipe extends into the gas secondary pipe.
The beneficial effects of the invention are as follows:
1. According to the invention, the primary pressure sensor does not need to be added to detect the primary pressure value of the air inlet, and the secondary pressure sensor is only added after the function of the square tube two-way switch stop valve, so that a new fault point of a new device is avoided, and the effective closing of the gas passage can be ensured when gas leakage occurs in unexpected situations.
2. The secondary pressure detection can be used for directly judging whether the gas pressure is high or low during starting, and the controller can adjust the opening of the gas proportional valve according to the secondary pressure in the operation process, so that the gas proportional valve is simple in structure and convenient to control.
3. When the gas pressure is low, the gas proportional valve is not preset limited, the opening of the gas proportional valve is increased, the maximum gas consumption output is realized, the water proportional valve is not required to be controlled to reduce the water quantity, the opening of the water proportional valve is reduced when the gas consumption is increased and the phenomenon that the water temperature is insufficient cannot be solved, and the water comfort is improved to the maximum extent. Meanwhile, by detecting the secondary pressure of the fuel gas, the maximum and minimum air consumption is automatically adjusted, so that the labor cost is saved, the consistency of products is improved, and the overall quality of the water heater is improved.
Drawings
FIG. 1 is a schematic block diagram of a control system of a gas water heater according to the present invention.
Fig. 2 is a schematic diagram showing a secondary pressure sensor mounting structure.
FIG. 3 is a flow chart of the gas water heater control system according to the present invention.
1: Main controller, 2: gas proportional valve, 3: water proportional valve, 4: operating the display, 5: a secondary pressure sensor.
Detailed Description
For the purpose of facilitating a better understanding of the nature of the present invention, a detailed description of embodiments of the invention is provided below in conjunction with the accompanying drawings.
As shown in fig. 1 and 2, a gas water heater control system includes: the gas water heater comprises a main controller 1, a gas proportional valve 2, a water proportional valve 3, an operation display 4 and a secondary pressure sensor 5 which are connected with the main controller 1, wherein the gas secondary pressure sensor 5 is arranged on a gas square pipe of the whole gas water heater and is positioned behind a two-way switch stop valve function, the output secondary pressure of gas is directly tested, the installation structure of the secondary pressure sensor 5 extends into the gas secondary pipeline for penetrating through the pipe wall of the gas secondary pipeline, and gas secondary pressure values corresponding to different load states of the gas water heater are stored in the main controller.
As shown in fig. 3, in actual operation, the main controller 1 controls the fan to start when judging that water exists, and controls the two switching valves to open, and meanwhile, the secondary pressure sensor 5 feeds back the secondary pressure to the main controller in real time. In a certain load state, when the secondary pressure is detected to be too high, the main controller 1 controls the opening degree of the fuel gas proportional valve 2 to be reduced, and when the secondary pressure is too low, the main controller 1 controls the opening degree of the fuel gas proportional valve 2 to be increased, so that the secondary pressure value is restored to the secondary pressure value corresponding to the current load state; when the secondary pressure is not detected, the user is prompted by operating the display 4 whether to open the gas valve.
The water proportional valve 3 is used for controlling the water flow of the gas water heater; when the secondary pressure is too low, if the opening degree of the gas proportional valve 2 is increased to the maximum value, the secondary pressure value cannot be restored to the secondary pressure value corresponding to the current load state, and the main controller 1 controls the opening degree of the water proportional valve 3 to be reduced.
Further, a temperature sensor is connected to the main controller, the temperature sensor is used for detecting the outlet water temperature of the gas water heater, and the set outlet water temperature is stored in the main controller; in the water using process, when the outlet water temperature detected by the temperature sensor is lower than a set value, the main controller judges whether the outlet water temperature set value can be reached when the maximum load is judged, if not, the opening of the water proportional valve is controlled to be reduced, and if so, the load is increased.
The gas water heater control system provided by the embodiment has the following characteristics: 1) The gas consumption of the whole machine can be determined by adding a gas secondary pressure sensor on the gas square tube of the whole machine and directly testing the output secondary pressure. Meanwhile, when the secondary pressure sensor detects that the secondary pressure of the fuel gas is low, the opening of the fuel gas proportional valve is regulated, the maximum opening of the fuel gas proportional valve is not limited any more, the fuel gas supply requirement is met, the fuel gas proportional valve can burn by the maximum drift diameter, and the problem that the fuel gas pressure is low and the water temperature is not hot enough is effectively solved. 2) The secondary pressure of the fuel gas is preset, and is automatically regulated by the main controller, so that regulation and calibration for reducing errors by manpower are avoided, the human errors in the production process are reduced, and the accuracy is higher; the gas proportional control valve solves the problems of fluctuation of the current output of the coil resistance deviation and the main board current of the existing gas proportional control valve, solves the problems of output deviation of mass production gas proportional valves and main controllers, and avoids the phenomena of noise, vibration, temperature overshoot and the like when a user uses the gas proportional control valve. 3) If the gas pressure is low, the influence of the preset opening of the gas proportional valve can be effectively reduced, and the problem that the comfort is affected because the low-pressure combustion cannot reach the set temperature is solved.
The above embodiments are described in detail for the essence of the present invention, but the scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that many improvements and modifications can be made without departing from the spirit of the invention, and it should be noted that these improvements and modifications fall within the scope of the appended claims.
Claims (1)
1. A gas water heater control method according to gas secondary pressure adjustment, comprising: the system comprises a main controller, a secondary pressure sensor, a fuel gas proportional valve and an operation display, wherein the secondary pressure sensor is connected with the main controller, is arranged behind a square pipe two-way switch stop valve function and is used for detecting fuel gas secondary pressure, and fuel gas secondary pressure values corresponding to different load states of a fuel gas water heater are stored in the main controller; under a certain load state, when the secondary pressure is detected to be too high, the main controller controls the opening degree of the fuel gas proportional valve to be reduced, and when the secondary pressure is too low, the main controller controls the opening degree of the fuel gas proportional valve to be increased, so that the secondary pressure value is restored to the secondary pressure value corresponding to the current load state; when the secondary pressure is not detected, prompting a user whether to open the gas valve by operating the display;
The main controller is connected with a water proportional valve which is used for controlling the water flow of the gas water heater; when the secondary pressure is too low, if the opening of the fuel gas proportional valve is increased to the maximum value, the secondary pressure value can not be restored to the secondary pressure value corresponding to the current load state, and the main controller controls the opening of the water proportional valve to be reduced;
The main controller is connected with a temperature sensor, the temperature sensor is used for detecting the water outlet temperature of the gas water heater, and the set water outlet temperature is stored in the main controller; in the water using process, when the outlet water temperature detected by the temperature sensor is lower than a set value, the main controller judges whether the outlet water temperature set value can be reached when the maximum load is judged, if not, the opening of the water proportional valve is controlled to be reduced, and if so, the load is increased;
The secondary pressure sensor mounting structure is as follows: the pipe wall penetrating through the gas secondary pipe extends into the gas secondary pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710182246.9A CN106940090B (en) | 2017-03-24 | 2017-03-24 | Gas water heater control system adjusted according to secondary pressure of gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710182246.9A CN106940090B (en) | 2017-03-24 | 2017-03-24 | Gas water heater control system adjusted according to secondary pressure of gas |
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| Publication Number | Publication Date |
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| CN106940090A CN106940090A (en) | 2017-07-11 |
| CN106940090B true CN106940090B (en) | 2024-05-03 |
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| CN201710182246.9A Active CN106940090B (en) | 2017-03-24 | 2017-03-24 | Gas water heater control system adjusted according to secondary pressure of gas |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107669464A (en) * | 2017-10-25 | 2018-02-09 | 广东美的安川服务机器人有限公司 | Shock wave atmospheric control and pneumatic shock wave equipment |
| CN109028593B (en) * | 2018-06-01 | 2020-09-25 | 广东万和热能科技有限公司 | Air-fuel ratio control method and device for gas heating water heater and gas heating water heater |
| CN110285579B (en) * | 2019-05-15 | 2021-08-24 | 广东万家乐燃气具有限公司 | Gas water heater with proportional three-way valve and control method |
| CN110926032B (en) * | 2019-11-01 | 2021-05-18 | 华帝股份有限公司 | Fan air volume adjusting method for gas water heater and gas water heater |
| CN112128988A (en) * | 2020-08-31 | 2020-12-25 | 华帝股份有限公司 | High-air-pressure identification control method for water heater and water heater |
| CN112229069A (en) * | 2020-11-12 | 2021-01-15 | 珠海格力电器股份有限公司 | Gas secondary pressure detection mechanism, gas distributor and gas water heater |
| CN113357820B (en) * | 2021-04-30 | 2022-07-08 | 华帝股份有限公司 | Control method of water heater |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62206327A (en) * | 1986-03-06 | 1987-09-10 | Matsushita Electric Ind Co Ltd | Hot water heating unit |
| CN101303161A (en) * | 2008-06-12 | 2008-11-12 | 中山华帝燃具股份有限公司 | Intelligent gas water heater and control method thereof |
| CN102778019A (en) * | 2011-05-11 | 2012-11-14 | 宁波帅康热水器有限公司 | Instantaneous gas water heater with accurate temperature control |
| CN105841353A (en) * | 2016-03-30 | 2016-08-10 | 成都前锋电子有限责任公司 | Gas water heater with wide adaption range and control method thereof |
| CN206771762U (en) * | 2017-03-24 | 2017-12-19 | 广东万家乐燃气具有限公司 | One kind is according to the pressure controlled gas water heater control system of gas secondary |
-
2017
- 2017-03-24 CN CN201710182246.9A patent/CN106940090B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62206327A (en) * | 1986-03-06 | 1987-09-10 | Matsushita Electric Ind Co Ltd | Hot water heating unit |
| CN101303161A (en) * | 2008-06-12 | 2008-11-12 | 中山华帝燃具股份有限公司 | Intelligent gas water heater and control method thereof |
| CN102778019A (en) * | 2011-05-11 | 2012-11-14 | 宁波帅康热水器有限公司 | Instantaneous gas water heater with accurate temperature control |
| CN105841353A (en) * | 2016-03-30 | 2016-08-10 | 成都前锋电子有限责任公司 | Gas water heater with wide adaption range and control method thereof |
| CN206771762U (en) * | 2017-03-24 | 2017-12-19 | 广东万家乐燃气具有限公司 | One kind is according to the pressure controlled gas water heater control system of gas secondary |
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| CN106940090A (en) | 2017-07-11 |
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