CN113865110B - Gas water heater and control method and device thereof - Google Patents
Gas water heater and control method and device thereof Download PDFInfo
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- CN113865110B CN113865110B CN202111127603.4A CN202111127603A CN113865110B CN 113865110 B CN113865110 B CN 113865110B CN 202111127603 A CN202111127603 A CN 202111127603A CN 113865110 B CN113865110 B CN 113865110B
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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
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- 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
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Abstract
The application relates to a gas water heater and a control method and device thereof. The control method comprises the following steps: acquiring gas combustion condition parameters; if the gas combustion condition parameter is in the first parameter range, controlling the pressurization module to increase the pressure of the gas in the gas pipeline, and controlling the pressurization module to keep the pressure of the gas in the gas pipeline until the gas combustion condition parameter is in the second parameter range; if the gas combustion condition parameter is in the third parameter range, controlling the controllable valve module to reduce the gas flow of the gas pipeline, and controlling the controllable valve module to keep the gas flow in the gas pipeline until the gas combustion condition parameter is in the second parameter range; wherein the second parameter range is between the first parameter range and the third parameter range. The fluctuation of the fuel gas in daily use can be solved, and the problems of standard exceeding of the flue gas, resonance and the like of the gas water heater are avoided.
Description
Technical Field
The application relates to the technical field of water heaters, in particular to a gas water heater and a control method and device thereof.
Background
The gas water heater uses gas as fuel and generates heat to heat cold water by combustion. The gas water heater has been developed for many years, has the advantages of convenient installation, good use safety and the like, and is widely applied to occasions needing hot water, such as bathrooms, kitchens and the like.
However, in the conventional gas water heater, the gas pressure in the user area is different or is lower when the gas consumption is high, so that the problems of over standard smoke, resonance, abnormal sound and the like are easily caused due to poor combustion condition.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a control method for a gas water heater, which can reduce the fluctuation of gas supply of the gas water heater and improve the combustion condition of gas.
The second technical problem to be solved by the invention is to provide a gas water heater, which has small fluctuation of gas supply and improves the combustion condition of gas.
The third technical problem to be solved by the present invention is to provide a control device for a gas water heater, which can reduce the fluctuation of gas supply of the gas water heater and improve the combustion condition of gas.
The first technical problem is solved by the following technical scheme:
a control method of a gas water heater comprises the following steps: acquiring gas combustion condition parameters; if the gas combustion condition parameter is in the first parameter range, controlling the pressurization module to increase the pressure of the gas in the gas pipeline, and controlling the pressurization module to keep the pressure of the gas in the gas pipeline until the gas combustion condition parameter is in the second parameter range; if the gas combustion condition parameter is in the third parameter range, controlling the controllable valve module to reduce the gas flow of the gas pipeline, and controlling the controllable valve module to keep the gas flow in the gas pipeline until the gas combustion condition parameter is in the second parameter range; wherein the second parameter range is between the first parameter range and the third parameter range.
Based on the control method of the gas water heater in the embodiment, the combustion condition of the gas is determined according to the gas combustion condition parameters, the gas amount is adjusted by controlling the pressurization module or the controllable valve module to deal with the fluctuation of the gas in daily use, and the gas combustion condition parameters can be adjusted from the first parameter range or the third parameter range to the second parameter range. When the gas combustion condition parameter is in the second parameter range, the combustion is in a better combustion condition, and the problems of standard exceeding of smoke, resonance and the like of the gas water heater are avoided.
In one embodiment, the gas combustion condition parameters include a heat load parameter, an upper bound of the first parameter range is the same as a lower bound of the second parameter range, and an upper bound of the second parameter range is the same as a lower bound of the third parameter range, and the step of obtaining the gas combustion condition parameters includes: acquiring the water inlet flow and the water inlet temperature of a gas water heater and the gas flow of a gas pipeline; determining theoretical temperature rise according to the inlet water temperature and the outlet water set temperature; determining theoretical heat load according to theoretical temperature rise and inflow; determining an actual heat load according to the gas flow and the gas heat value; and determining a heat load parameter according to the theoretical heat load and the actual heat load to obtain a gas combustion condition parameter.
In one embodiment, the gas combustion condition parameter comprises the carbon dioxide content in the flue gas discharged by the gas water heater, the upper bound of the first parameter range is the same as the lower bound of the second parameter range, and the upper bound of the second parameter range is the same as the lower bound of the third parameter range.
In one embodiment, the gas combustion condition parameter comprises oxygen content in flue gas discharged from the gas water heater, and the lower bound of the first parameter range is the same as the upper bound of the second parameter range, and the lower bound of the second parameter range is the same as the upper bound of the third parameter range.
In one embodiment, the control method further comprises: acquiring the water inlet flow and the water inlet temperature of the gas water heater; determining theoretical temperature rise according to the inlet water temperature and the outlet water set temperature; determining theoretical heat load according to theoretical temperature rise and inflow; determining a power output gear of the gas water heater according to the theoretical heat load; selecting a group of parameter boundaries from a plurality of groups of parameter boundaries according to the power output gear to determine a first parameter range, a second parameter range and a third parameter range; each group of parameter boundaries comprises an upper bound value and a lower bound value of a first parameter range, a second parameter range and a third parameter range.
The embodiment adaptively adjusts the first parameter range, the second parameter range and the third parameter range for evaluating the parameters of the gas combustion condition, so that the parameters of the gas combustion condition are evaluated within the parameter range more conforming to the gas combustion condition, the adjustment of the gas supply amount is more accurate, and the combustion condition of the gas water heater is further optimized.
In one embodiment, the gas pipeline comprises an air inlet pipeline, a concentrated combustion gas pipeline and a light combustion gas pipeline, and the air inlet pipeline is respectively communicated with the concentrated combustion gas pipeline and the light combustion gas pipeline so as to convey gas to the concentrated combustion gas pipeline and the light combustion gas pipeline; the controllable valve module is arranged on the air inlet pipeline; the pressurizing module comprises a first pressurizing module and a second pressurizing module, the first pressurizing module is arranged on the thick combustion gas pipeline, and the second pressurizing module is arranged on the light combustion gas pipeline; if gas combustion condition parameter is in first parameter scope, then the pressure of the gas that the control pressure boost module increased in the gas pipeline, until after gas combustion condition parameter is in second parameter scope, the step that the control pressure boost module kept the gas in the gas pipeline pressure includes: if the gas combustion condition parameter is in the first parameter range, respectively controlling the first pressurizing module to increase the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurizing module to increase the pressure of the gas in the light combustion gas pipeline, and controlling the first pressurizing module to keep the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurizing module to keep the pressure of the gas in the light combustion gas pipeline until the gas combustion condition parameter is in the second parameter range; if the gas combustion condition parameter is in the third parameter scope, then control controllable valve module and reduce the gas flow of gas pipeline, until the gas combustion condition parameter is in the second parameter scope after, the step that the controllable valve module of control keeps the gas flow in the gas pipeline includes: if the gas combustion condition parameter is in the third parameter range, the controllable valve module is controlled to reduce the gas flow of the gas inlet pipeline, and the controllable valve module is controlled to keep the gas flow in the gas inlet pipeline until the gas combustion condition parameter is in the second parameter range.
In one embodiment, the step of controlling the first pressure increasing module to increase the pressure of the gas in the rich-burn gas pipeline and the step of controlling the second pressure increasing module to increase the pressure of the gas in the lean-burn gas pipeline respectively comprises: controlling the first pressurizing module to increase the pressure of the fuel gas in the concentrated combustion fuel gas pipeline to a first preset pressure and controlling the second pressurizing module to increase the pressure of the fuel gas in the weak combustion fuel gas pipeline to a second preset pressure; wherein the first preset pressure is different from the second preset pressure.
In one embodiment, the control method further includes: acquiring the water inlet flow and the water inlet temperature of the gas water heater; determining theoretical temperature rise according to the inlet water temperature and the outlet water set temperature; determining theoretical heat load according to theoretical temperature rise and inflow; determining a power output gear of the gas water heater according to the theoretical heat load; and determining a first preset pressure and a second preset pressure according to the power output gear.
The proportion of controlling the thick combustion by adjusting the first preset pressure and the proportion of controlling the thin combustion by adjusting the second preset pressure enable the gas water heater to be more sufficient in combustion when the corresponding power output gear works with a better thick-thin ratio, and the discharge amount of nitrogen oxides can be further reduced.
The second technical problem is solved by the following technical scheme:
a gas water heater comprising: a gas pipeline; the controllable valve module is arranged on the gas pipeline and used for controlling the gas flow of the gas pipeline; the pressurizing module is arranged on the gas pipeline and used for increasing the pressure of gas in the gas pipeline; the controller is connected with the controllable valve module and the pressurization module and comprises a memory and a processor, and the processor realizes the steps of the control method when executing the computer program.
Based on the gas water heater of this embodiment, the combustion condition of gas is confirmed and the gas volume is adjusted in order to deal with the fluctuation of gas pressure in daily use through control pressure boost module or controllable valve module according to gas combustion condition parameter, makes gas combustion condition parameter can be adjusted to the second parameter scope from first parameter scope or third parameter scope. When the gas combustion condition parameter is in the second parameter range, the combustion is in a better combustion condition, and the problems of standard exceeding of smoke, resonance and the like of the gas water heater are avoided.
The third technical problem is solved by the following technical scheme:
a control device for a gas water heater, comprising: the parameter acquisition module is used for acquiring parameters of the gas combustion condition; the first control module is used for controlling the pressurization module to increase the pressure of the gas in the gas pipeline if the gas combustion condition parameter is within a first parameter range, and controlling the pressurization module to keep the pressure of the gas in the gas pipeline until the gas combustion condition parameter is within a second parameter range; the second control module is used for controlling the controllable valve module to reduce the gas flow of the gas pipeline if the gas combustion condition parameter is within the third parameter range, and controlling the controllable valve module to keep the gas flow in the gas pipeline after the gas combustion condition parameter is within the second parameter range; wherein the second parameter range is between the first parameter range and the third parameter range.
Based on the control device of the gas water heater of the embodiment, the combustion condition of the gas is determined according to the gas combustion condition parameters, the gas amount is adjusted by controlling the pressurization module or the controllable valve module to deal with the fluctuation of the gas pressure in daily use, and the gas combustion condition parameters can be adjusted from the first parameter range or the third parameter range to the second parameter range. When the gas combustion condition parameter is in the second parameter range, the combustion is in a better combustion condition, and the problems of standard exceeding of smoke, resonance and the like of the gas water heater are avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow diagram of an embodiment of a gas water heater;
FIG. 2 is a schematic flow chart of obtaining parameters of gas combustion conditions in one embodiment;
FIG. 3 is a flow diagram illustrating the process of determining a first parameter range, a second parameter range, and a third parameter range according to one embodiment;
FIG. 4 is a schematic flow chart illustrating the control of the pressure increasing module to increase the pressure of the fuel gas in the fuel gas pipeline according to an embodiment;
FIG. 5 is a schematic view of a gas water heater in one embodiment;
FIG. 6 is a block diagram of a gas water heater according to an embodiment;
FIG. 7 is a schematic piping diagram of a gas water heater in one embodiment;
FIG. 8 is a schematic piping diagram of a gas water heater in another embodiment;
FIG. 9 is a schematic diagram of a gas water heater according to one embodiment;
FIG. 10 is a schematic structural diagram of the piping in the embodiment of FIG. 8;
FIG. 11 is a block diagram showing the construction of a control device in one embodiment;
description of reference numerals:
10-gas water heater, 11-controllable valve module, 13-pressure boost module, 13A-first pressure boost module, 13B-second pressure boost module, 15-controller, 110-first nozzle, 111-second nozzle, 112-third nozzle, 120-first partial solenoid valve, 121-second partial solenoid valve, 122-third partial solenoid valve, 130-pressure sensor, 140-second check valve, 141-first check valve, 150-total solenoid valve, 210A-first light flame nozzle, 210B-first rich flame nozzle, 211A-second light flame nozzle, 211B-first rich flame nozzle, 212A-third light flame nozzle, 212B-third rich flame nozzle, 220A-first light flame partial solenoid valve, 220B-first rich flame partial solenoid valve, 221A-second light flame partial solenoid valve, 220B-second rich flame partial solenoid valve, 222A-third light flame partial solenoid valve, 222B-third flame partial solenoid valve, 230-second flame partial solenoid valve, 221A-second rich flame partial solenoid valve, 221B-second partial flame partial solenoid valve, 221A-third flame partial solenoid valve, 222B-third flame partial solenoid valve, 230-second partial solenoid valve, 231-second partial solenoid valve, and a pressure sensor, and a fourth partial solenoid valve, and a pressure control module, and a controller.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may comprise additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The embodiment of the invention provides a control method of a gas water heater. The controllable valve module is used for controlling the gas flow of the gas pipeline, and the pressurization module is used for increasing the pressure of the gas in the gas pipeline. The proportion of gas and air will directly influence the burning condition of gas, respectively through the supply of controllable valve module and the adjustment of pressure boost module gas. As shown in fig. 1, the control method of the gas water heater includes steps S100 to S500.
And S100, acquiring gas combustion condition parameters.
The gas combustion condition parameters are used for reflecting the combustion condition of the gas. It can be understood that because the burning of gas takes place inside the gas, and the naked eye is also difficult to judge whether the gas burns normally. However, since the gas combustion condition differs depending on the physical quantity related to the gas combustion, the gas combustion condition parameter may be selected from the physical quantities related to the gas combustion. For example, the content of various products during combustion of gas, the heat load during combustion of gas, and the like.
S300, if the gas combustion condition parameters are within the first parameter range, the pressurization module is controlled to increase the pressure of the gas in the gas pipeline, and the pressurization module is controlled to keep the pressure of the gas in the gas pipeline until the gas combustion condition parameters are within the second parameter range.
The gas combustion condition parameter is in the first parameter range, which reflects that the gas quantity is insufficient to cause poor gas combustion condition. The pressure of the fuel gas in the fuel gas pipeline is increased through the pressurizing module, so that the fuel gas quantity is increased. The gas combustion condition parameter is in the second parameter range, so that the gas quantity is relatively proper, the gas can be fully combusted, and the gas combustion condition is normal.
S500, if the gas combustion condition parameters are within the third parameter range, the controllable valve module is controlled to reduce the gas flow of the gas pipeline, and the controllable valve module is controlled to keep the gas flow in the gas pipeline until the gas combustion condition parameters are within the second parameter range.
Wherein the second parameter range is between the first parameter range and the third parameter range. The gas combustion condition parameter is in the third parameter range, which reflects that the gas combustion condition is poor due to overlarge gas quantity. The gas flow of the gas pipeline is reduced by controlling the controllable valve module, so that the gas quantity is reduced. The gas combustion condition parameter is in the second parameter range, so that the gas quantity is relatively proper, the gas can be fully combusted, and the gas combustion condition is normal.
Based on the control method of the gas water heater in the embodiment, the combustion condition of the gas is determined according to the gas combustion condition parameters, and the gas amount is adjusted by controlling the pressurization module or the controllable valve module to deal with the fluctuation of the gas pressure in daily use, so that the gas combustion condition parameters can be adjusted from the first parameter range or the third parameter range to the second parameter range. When the gas combustion condition parameter is in the second parameter range, the combustion is in a better combustion condition, and the problems of standard exceeding of smoke, resonance and the like of the gas water heater are avoided.
In one embodiment, the gas combustion condition parameter comprises a heat load parameter. The upper bound of the first parameter range is the same as the lower bound of the second parameter range, which is the same as the lower bound of the third parameter range. The first parameter range is (0, a 1), the second parameter range is [ a1, b1], and the third parameter range is (b 1, ∞) in the form of mathematical expressions. As shown in fig. 2, the step of acquiring the gas combustion condition parameters includes steps S110 to S190.
And S110, acquiring the water inlet flow and the water inlet temperature of the gas water heater and the gas flow of a gas pipeline.
Specifically, the water inlet flow of the gas water heater can be obtained by arranging the water flow sensor on the water inlet pipe of the gas water heater, the water inlet temperature of the gas water heater is obtained by arranging the water temperature sensor on the water inlet pipe of the gas water heater, and the gas flow of the gas pipeline is obtained by arranging the gas flow sensor on the gas pipeline. The data required in step S110 may be acquired in other ways, which are merely illustrative and not restrictive.
And S130, determining theoretical temperature rise according to the inlet water temperature and the outlet water set temperature.
The outlet water set temperature reflects the temperature of the hot water required to be output by the gas water heater. The theoretical temperature rise is the temperature difference between the water outlet set temperature and the water inlet temperature.
And S150, determining a theoretical heat load according to the theoretical temperature rise and the inflow rate.
The water inlet flow is the amount of water flowing into the gas water heater in unit time. The theoretical thermal load reflects the theoretical amount of power required to heat the water flowing into the gas water heater from the inlet water temperature to the outlet water set temperature. Since the tap water has a small change in density, the value of the inflow rate can be regarded as being proportional to the mass of the portion of water. The specific heat capacity formula reflects the relationship between the product of the mass and the temperature rise of water and the energy, so that the theoretical heat load can be determined according to the product of the inflow water flow and the theoretical temperature rise by referring to the specific heat capacity formula.
And S170, determining the actual heat load according to the gas flow and the gas heat value.
The calorific value of the gas is the amount of heat that can be generated by the combustion of a unit volume of gas. The corresponding gas heat values of different types of gas are different, the corresponding gas heat values can be obtained by configuring a program for distinguishing the gas types, the gas heat values of common gas types can be stored in a controller of the gas water heater in advance, and a user selects the currently used gas type by operating the gas water heater and calls the controller of the gas water heater to use the corresponding gas heat values. The gas flow is the volume of gas delivered into the gas pipeline per unit time. The actual heat load reflects the actual power generated when the gas is burned in the gas water heater. The heat generated by the combustion of the fuel gas in unit time can be determined according to the product of the heat value of the fuel gas and the flow of the fuel gas, and the power is the energy in unit time, so that the actual heat load can be determined according to the heat.
And S190, determining a heat load parameter according to the theoretical heat load and the actual heat load to obtain a gas combustion condition parameter.
The heat load parameter reflects the relationship between the actual power and the theoretical power of the gas water heater during gas combustion. It is understood that when the combustion of the gas is good, the difference between the actual power and the theoretical power should be small. When the gas is burnt too much, the actual power exceeds the theoretical power more. When the gas is burnt too little, the actual power will be much lower than the theoretical power. Therefore, the gas combustion condition can be determined according to the heat load parameter.
The heat load parameter is a ratio of an actual heat load to a theoretical heat load. The fact that the heat load parameter is in the first parameter range means that the actual heat load is low, the gas is burnt too little, and the heat load parameter is increased to the second parameter range from the first parameter range by controlling the pressurizing module to increase the gas supply amount. The thermal load parameter is in the second parameter range, which means that the actual thermal load and the theoretical thermal load are not large to be interpolated, and the gas combustion condition is good. The fact that the heat load parameter is in the third parameter range means that the actual heat load is large, the gas is burnt too much, the gas supply amount is reduced through the controllable valve module, and the heat load parameter is reduced to the second parameter range from the third parameter range.
In one embodiment, the gas combustion condition parameter comprises a carbon dioxide content in a flue gas discharged from the gas water heater. The upper bound of the first parameter range is the same as the lower bound of the second parameter range, which is the same as the lower bound of the third parameter range. The first parameter range is (0, a 2), the second parameter range is [ a2, b2], and the third parameter range is (b 2, ∞) in the form of mathematical expressions. It is understood that carbon dioxide is a complete combustion product of the combustion gases. When the carbon dioxide content in the flue gas is in the first parameter range, the carbon dioxide content in the flue gas is low, the combustion of the fuel gas is too little, and the supply amount of the fuel gas is increased by controlling the pressurization module, so that the carbon dioxide content is increased to the second parameter range from the first parameter range. When the carbon dioxide content in the flue gas is in the second parameter range, the carbon dioxide content in the flue gas is consistent with the carbon dioxide yield when the fuel gas is well combusted. When the carbon dioxide content in the flue gas is in the third parameter range, the carbon dioxide content in the flue gas is high, the fuel gas is burnt too much, and the supply amount of the fuel gas is reduced by controlling the controllable valve module, so that the carbon dioxide content is reduced to the second parameter range from the third parameter range.
In one embodiment, the gas combustion condition parameter comprises oxygen content in flue gas discharged from the gas water heater, a lower bound of the first parameter range is the same as an upper bound of the second parameter range, and a lower bound of the second parameter range is the same as an upper bound of the third parameter range. The first parameter range is (a 3, ∞), the second parameter range is [ b3, a3], and the third parameter range is (0, b3) in the form of mathematical expressions. It can be understood that oxygen is a combustion improver for combustion of gas, and complete combustion of gas gradually consumes oxygen. When the oxygen content in the flue gas is in the first parameter range, the oxygen content in the flue gas is high, and the consumption of the oxygen is reflected to be low, namely the combustion of the fuel gas is too little. The gas supply amount is increased by controlling the pressurization module, so that the oxygen content is reduced from a first parameter range to a second parameter range. When the oxygen content in the flue gas is in the second parameter range, the oxygen content in the flue gas is matched with the oxygen content of the fuel gas during good combustion. When the oxygen content in the flue gas is in the third parameter range, the oxygen content in the flue gas is low, which reflects that the consumption of oxygen is large, namely the fuel gas is burnt too much. And the supply amount of the fuel gas is reduced by controlling the controllable valve module, so that the oxygen content is increased from the third parameter range to the second parameter range.
In one embodiment, as shown in fig. 3, the control method further includes step S111 to step S191.
And S111, acquiring the water inlet flow and the water inlet temperature of the gas water heater.
S131, determining theoretical temperature rise according to the inlet water temperature and the outlet water set temperature.
And S151, determining a theoretical heat load according to the theoretical temperature rise and the inflow rate.
Steps S111 to S151 are similar to steps S110 to S150 in the embodiment of fig. 2, and are not repeated herein. It is understood that, from the viewpoint of simplifying the execution of the steps, the steps S111 to S151 in the present embodiment need not be repeatedly executed after the theoretical thermal load is obtained according to the steps S110 to S150 in the embodiment of fig. 2.
And S171, determining the power output gear of the gas water heater according to the theoretical heat load.
It will be appreciated that the gas water heater operates at different power output levels to heat water in the heat exchanger in the gas water heater at different powers. For example, the higher the power output gear of the gas water heater is, the more the fire rows of the gas water heater are simultaneously operated, and the higher the power can be used for heating the water in the heat exchanger.
And S191, selecting a group of parameter boundaries from the multiple groups of parameter boundaries according to the power output gear to determine a first parameter range, a second parameter range and a third parameter range.
Each group of parameter boundaries comprises an upper bound value and a lower bound value of a first parameter range, a second parameter range and a third parameter range. At different power output gears, the gas combustion conditions of the gas water heater are different, so that a first parameter range, a second parameter range and a third parameter range for evaluating the gas combustion condition parameters need to be adaptively adjusted, the gas combustion condition parameters are evaluated within the parameter range more conforming to the gas combustion condition, the gas supply quantity is adjusted more accurately, and the combustion condition of the gas water heater is further optimized.
In one embodiment, the gas water heater may be a gas water heater with a dense-dilute combustion structure. It is understood that the rich-lean combustion is also called non-stoichiometric combustion, and by combining the combustion with a large gas proportion and the combustion with a small combustion volume, the purposes of delaying burnout and reducing the temperature in a high-temperature combustion area so as to reduce the generation of nitrogen oxides can be achieved. Specifically, the gas pipeline comprises an air inlet pipeline, a concentrated combustion gas pipeline and a light combustion gas pipeline. The gas inlet pipeline is respectively communicated with the concentrated combustion gas pipeline and the light combustion gas pipeline so as to convey gas to the concentrated combustion gas pipeline and the light combustion gas pipeline. The controllable valve module is arranged on the air inlet pipeline. The pressure boost module includes first pressure boost module and second pressure boost module, and first pressure boost module sets up at dense burning gas pipeline, and second pressure boost module sets up at light burning gas pipeline.
Step S300 specifically includes: if the gas combustion condition parameter is in the first parameter range, respectively controlling the first pressurizing module to increase the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurizing module to increase the pressure of the gas in the light combustion gas pipeline until the gas combustion condition parameter is in the second parameter range, and controlling the first pressurizing module to keep the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurizing module to keep the pressure of the gas in the light combustion gas pipeline.
Step S500 specifically includes: if the gas combustion condition parameters are in the third parameter range, the controllable valve module is controlled to reduce the gas flow of the gas inlet pipeline until the gas combustion condition parameters are in the second parameter range, and the controllable valve module is controlled to keep the gas flow in the gas inlet pipeline.
In one embodiment, the controlling the first pressure increasing module to increase the pressure of the gas in the rich-burn gas pipeline and the controlling the second pressure increasing module to increase the pressure of the gas in the lean-burn gas pipeline are specifically: the first pressure boost module of control makes the pressure of the gas in the dense combustion gas pipeline increase to first preset pressure and control second pressure boost module makes the pressure of the gas in the weak combustion gas pipeline increase to second preset pressure. The first predetermined pressure is different from the second predetermined pressure. It is understood that the rich combustion and the lean combustion are two combustion modes having different ratios of gas to air, and their respective required gas supply amounts are different, so that the gas pressures in the rich combustion line and the lean combustion line are increased to different values when the supercharging is performed. The first preset pressure and the second preset pressure are related to the number of liters of the gas water heater, the structure of the burner, the rotating speed of the fan and the like, and can be set according to actual conditions.
In one embodiment, in order to enable the gas water heater with the thick and thin combustion structure to combust at different thick and thin gas proportions at different power output gears. As shown in fig. 4, the step of controlling the pressurization module to increase the pressure of the gas in the gas pipeline includes S310 to S390.
And S310, acquiring the water inlet flow and the water inlet temperature of the gas water heater.
S330, determining theoretical temperature rise according to the inlet water temperature and the outlet water set temperature.
And S350, determining theoretical heat load according to the theoretical temperature rise and the inflow water flow.
Steps S310 to S350 are similar to steps S110 to S150 in the embodiment of fig. 2, and are not repeated herein. It is understood that, from the viewpoint of simplifying the execution of the steps, the steps S310 to S350 in the present embodiment need not be repeatedly executed after the theoretical thermal load is obtained from the steps S110 to S150 or the steps S111 to S151.
And S370, determining the power output gear of the gas water heater according to the theoretical heat load.
Step S370 is similar to step S171 and will not be described herein. It is understood that, from the viewpoint of simplifying the execution steps, the step S370 in the present embodiment need not be repeatedly executed after the power output gear of the gas water heater is determined according to the step S171.
And S390, determining a first preset pressure and a second preset pressure according to the power output gear, controlling the first pressurizing module to increase the pressure of the gas in the concentrated combustion gas pipeline to the first preset pressure, and controlling the second pressurizing module to increase the pressure of the gas in the light combustion gas pipeline to the second preset pressure.
Each power output gear corresponds to a first preset pressure and a second preset pressure. It can be understood that different power output gears correspond to a most appropriate ratio of rich combustion and lean combustion, the ratio of the rich combustion can be controlled by adjusting the first preset pressure and the ratio of the lean combustion can be controlled by adjusting the second preset pressure, so that when the corresponding power output gears of the gas water heater work in a better rich-lean ratio, the combustion is more sufficient, and the emission of nitrogen oxides can be further reduced. Each of the first and second preset pressures may be experimentally measured.
It should be understood that although the various steps in the flowcharts of fig. 1-4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-4 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps or stages.
Referring to fig. 5 to 6, an embodiment of the invention further provides a gas water heater 10, which includes a gas pipeline, a controllable valve module 11, a pressure increasing module 13 and a controller 15. The gas pipeline is used for taking gas from a gas source, such as pipeline gas and a gas tank, and conveying the gas to a burner of the gas water heater for combustion. The controllable valve module 11 is arranged on the gas pipeline and used for controlling the gas flow of the gas pipeline. The controllable valve module 11, which is commonly used, includes a proportional valve, and controls the gas flow in the gas pipeline by controlling the opening of the proportional valve. The pressurization module 13 is arranged on the gas pipeline and used for increasing the pressure of gas in the gas pipeline. The controller 15 is connected to the controllable valve module 11 and the pressurization module 13, and includes a memory and a processor, and the processor executes a computer program to implement the steps of any one of the above control methods for the gas water heater.
Based on the gas water heater of this embodiment, the combustion condition of gas is confirmed according to gas combustion condition parameter and adjusts the gas volume through controlling pressure boost module 13 or controllable valve module 11 in order to deal with the fluctuation of gas pressure in daily use, makes gas combustion condition parameter can adjust to the second parameter scope from first parameter scope or third parameter scope. When the gas combustion condition parameters are in the second parameter range, the combustion is in a better combustion condition, and the problems of standard exceeding of smoke, resonance and the like of the gas water heater are avoided.
In one embodiment, the piping structure of the gas water heater may be a single gas path water heater, as shown in FIG. 7. In fig. 7, the booster module 13 is a booster pump, and the controllable valve module 11 is a proportional valve. The main solenoid valve 150 is used to turn off and on the gas hot water. The gas inlet end and the gas outlet end of the booster pump are respectively provided with a first check valve 141 and a second check valve 140 for ensuring that the gas flows from the gas inlet to each nozzle. Gas supply of the device. The controller may control the booster pump to increase the pressure of the gas pipeline to a preset value according to the pressure of the gas pipeline fed back by the pressure sensor 130 in fig. 7 when executing step S300, so that the gas combustion condition parameter is in the second parameter range. The first sub solenoid valve 120 is used to cut off and open the gas supply of the first nozzle 110, the second sub solenoid valve 121 is used to cut off and open the gas supply of the second nozzle 111, and the third sub solenoid valve 122 is used to cut off and open the gas supply of the third nozzle 112. The quantity of the branch solenoid valves can be set according to power output gears, and the embodiment is a gas water heater with three-gear power output gears. And in a low-power output gear, one of the partial electromagnetic valves is controlled to be opened, and the other two partial electromagnetic valves are controlled to be closed. In the medium power output gear, two of the partial electromagnetic valves are controlled to be opened, and the other partial electromagnetic valve is controlled to be closed. And in a high-power output gear, all the branch electromagnetic valves are controlled to be opened.
In one embodiment, the gas water heater may also be a gas water heater with a dense-dilute combustion structure, please refer to fig. 8 to 10. In one embodiment, the gas lines include an air intake line, a rich burn gas line, and a lean burn gas line. The gas inlet pipeline is respectively communicated with the concentrated combustion gas pipeline and the light combustion gas pipeline so as to convey gas to the concentrated combustion gas pipeline and the light combustion gas pipeline. The controllable valve module 11 is arranged on the air inlet pipeline. The pressurizing module 13 comprises a first pressurizing module 13A and a second pressurizing module 13B, the first pressurizing module 13A is arranged on a dense combustion gas pipeline, and the second pressurizing module 13B is arranged on a light combustion gas pipeline.
With continued reference to fig. 8 to 10, in an embodiment, the main solenoid valve 150 is used to cut off and open the gas supply of the gas water heater, and the gas inlet end and the gas outlet end of the first pressure increasing module 13A are respectively provided with a third check valve 241 and a fourth check valve 240 for ensuring that the gas flows from the rich combustion gas pipeline to the rich combustion nozzles. The air inlet end and the air outlet end of the second supercharging module 13B are respectively provided with a fifth check valve 242 and a sixth check valve 243 for ensuring that the flowing direction of the gas flows from the light combustion gas pipeline to each light combustion nozzle. The first light flame partial solenoid valve 220A is used to cut off and open the gas supply of the first light flame nozzle 210A, the second light flame partial solenoid valve 221A is used to cut off and open the gas supply of the second light flame nozzle 211A, and the third light flame partial solenoid valve 222A is used to cut off and open the gas supply of the third light flame nozzle 212A. The first rich flame partial solenoid valve 220B is used to cut off and open the gas supply of the first rich flame nozzle 210B, the second rich flame partial solenoid valve 221B is used to cut off and open the gas supply of the second rich flame nozzle 211B, and the third rich flame partial solenoid valve 222B is used to cut off and open the gas supply of the third rich flame nozzle 212B. The third solenoid valve 122 is used to cut off and open the gas supply of the third nozzle 112. The quantity of the branch solenoid valves can be set according to power output gears, and the embodiment is a gas water heater with three-gear power output gears. And in a low-power output gear, one group of the thick and thin flame distribution electromagnetic valves is controlled to be opened, and the rest two groups of the thick and thin flame distribution electromagnetic valves are controlled to be closed. And in a medium power output gear, two groups of the thick and thin flame branch electromagnetic valves are controlled to be opened, and the rest group of the thick and thin flame branch electromagnetic valves are controlled to be closed. And in a high-power output gear, all the thick and thin flame distribution electromagnetic valves are controlled to be opened.
Referring to fig. 8 to 10, in an embodiment, the rich combustion gas pipeline is provided with a first pressure sensor 230, and the first pressure sensor 230 is used for acquiring the pressure of the gas in the rich combustion gas pipeline. The light combustion gas pipeline is provided with a second pressure sensor 231, and the second pressure sensor 231 is used for acquiring the pressure of the gas of the light combustion gas pipeline. The controller 15 is connected to the first pressure sensor 230 and the second pressure sensor 231. The controller 15 may monitor the pressure of the rich burn gas line to determine whether a first preset pressure is reached and the pressure of the lean burn gas line to determine whether a second preset pressure is reached.
In one embodiment, the gas water heater further comprises a water flow sensor, a water temperature sensor, and a gas flow sensor. The water flow sensor is connected with the controller 15 and used for collecting the water inlet flow of the gas water heater. The water temperature sensor is connected with the controller 15 and used for collecting the water inlet temperature of the gas water heater. The gas flow sensor is connected with the controller 15 and used for collecting the gas flow of the gas pipeline. The controller 15 can obtain the water inlet flow and the water inlet temperature of the gas water heater and the gas flow of the gas pipeline.
An embodiment of the present invention further provides a control device 300 of a gas water heater, as shown in fig. 11, the control device includes a parameter obtaining module 310, a first control module 330, and a second control module 350.
The parameter obtaining module 310 is used for obtaining gas combustion condition parameters. First control module 330 is used for if the gas combustion condition parameter is in first parameter scope, then control the pressure boost module and increase the pressure of the gas in the gas pipeline, until after the gas combustion condition parameter is in second parameter scope, control the pressure boost module and keep the pressure of the gas in the gas pipeline. The second control module 350 is configured to control the controllable valve module to reduce the gas flow of the gas pipeline if the gas combustion condition parameter is within the third parameter range, and control the controllable valve module to maintain the gas flow in the gas pipeline until the gas combustion condition parameter is within the second parameter range. Wherein the second parameter range is between the first parameter range and the third parameter range.
Based on the gas water heater of this embodiment, the combustion condition of gas is confirmed and the gas volume is adjusted in order to deal with the fluctuation of gas pressure in daily use through control pressure boost module or controllable valve module according to gas combustion condition parameter, makes gas combustion condition parameter can be adjusted to the second parameter scope from first parameter scope or third parameter scope. When the gas combustion condition parameters are in the second parameter range, the combustion is in a better combustion condition, and the problems of standard exceeding of smoke, resonance and the like of the gas water heater are avoided.
In one embodiment, the parameter obtaining module 310 is further configured to obtain an inlet water flow rate, an inlet water temperature, and a gas flow rate of a gas pipeline of the gas water heater, determine a theoretical temperature rise according to the inlet water temperature and the outlet water set temperature, determine a theoretical heat load according to the theoretical temperature rise and the inlet water flow rate, determine an actual heat load according to the gas flow rate and a gas heat value, and determine a heat load parameter according to the theoretical heat load and the actual heat load to obtain a gas combustion condition parameter.
In one embodiment, the parameter obtaining module 310 is further configured to determine a power output gear of the gas water heater according to the theoretical thermal load and select a set of parameter boundaries from a plurality of sets of parameter boundaries according to the power output gear to determine the first parameter range, the second parameter range, and the third parameter range.
In one embodiment, the first control module 330 includes a first boost unit and a second boost unit. The first pressurizing unit is used for controlling the first pressurizing module to increase the pressure of the fuel gas in the rich combustion fuel gas pipeline and controlling the first pressurizing module to keep the pressure of the fuel gas in the rich combustion fuel gas pipeline when the fuel gas combustion condition parameters are in the second parameter range. The second pressurizing unit is used for controlling the second pressurizing module to increase the pressure of the gas in the light combustion gas pipeline and controlling the second pressurizing module to keep the pressure of the gas in the light combustion gas pipeline when the gas combustion condition parameter is in the second parameter range.
In one embodiment, the first pressure increasing unit is further configured to control the first pressure increasing module to increase the pressure of the gas in the rich-burn gas pipeline to a first preset pressure. The second pressurization unit is also used for controlling the second pressurization module to increase the pressure of the fuel gas in the light combustion fuel gas pipeline to a second preset pressure. The first predetermined pressure is different from the second predetermined pressure.
In one embodiment, the control device further comprises a configuration module. The configuration module is used for determining a first preset pressure and a second preset pressure according to the power output gear.
The specific definition of the control device of the gas water heater can be referred to the definition of the method of the gas water heater in the above, and the detailed description is omitted here. The modules in the control device of the gas water heater can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, the computer program can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The control method of the gas water heater is characterized in that the gas water heater comprises a gas inlet pipeline, a concentrated combustion gas pipeline, a light combustion gas pipeline, a controllable valve module, a first pressurizing module and a second pressurizing module, wherein the gas inlet pipeline is respectively communicated with the concentrated combustion gas pipeline and the light combustion gas pipeline so as to convey gas to the concentrated combustion gas pipeline and the light combustion gas pipeline; the controllable valve module is arranged on the air inlet pipeline; the first pressurization module is arranged on the concentrated combustion gas pipeline, and the second pressurization module is arranged on the weak combustion gas pipeline; the control method comprises the following steps:
acquiring gas combustion condition parameters;
if the gas combustion condition parameter is in a first parameter range, respectively controlling the first pressurization module to increase the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurization module to increase the pressure of the gas in the light combustion gas pipeline, and controlling the first pressurization module to maintain the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurization module to maintain the pressure of the gas in the light combustion gas pipeline until the gas combustion condition parameter is in a second parameter range;
if the gas combustion condition parameter is in a third parameter range, controlling the controllable valve module to reduce the gas flow of the gas inlet pipeline, and controlling the controllable valve module to keep the gas flow in the gas inlet pipeline after the gas combustion condition parameter is in the second parameter range; wherein the second parameter range is between the first parameter range and the third parameter range.
2. The control method of claim 1, wherein the gas combustion condition parameter comprises a heat load parameter, an upper bound of the first parameter range is the same as a lower bound of the second parameter range, an upper bound of the second parameter range is the same as a lower bound of the third parameter range, and the step of obtaining the gas combustion condition parameter comprises:
acquiring the water inlet flow and the water inlet temperature of the gas water heater and the gas flow of the gas inlet pipeline;
determining theoretical temperature rise according to the water inlet temperature and the water outlet set temperature;
determining a theoretical heat load according to the theoretical temperature rise and the inflow water flow;
determining an actual heat load according to the gas flow and the gas heat value;
and determining the heat load parameter according to the theoretical heat load and the actual heat load so as to obtain the gas combustion condition parameter.
3. The control method of claim 1, wherein the gas combustion condition parameter comprises a carbon dioxide content in a flue gas discharged from the gas water heater, an upper bound of the first parameter range is the same as a lower bound of the second parameter range, and an upper bound of the second parameter range is the same as a lower bound of the third parameter range.
4. The control method of claim 1, wherein the gas combustion condition parameter comprises an oxygen content in flue gas discharged from the gas water heater, and wherein a lower bound of the first parameter range is the same as an upper bound of the second parameter range, and wherein a lower bound of the second parameter range is the same as an upper bound of the third parameter range.
5. The control method according to claim 1, characterized by further comprising:
acquiring the water inlet flow and the water inlet temperature of the gas water heater;
determining theoretical temperature rise according to the water inlet temperature and the water outlet set temperature;
determining a theoretical heat load according to the theoretical temperature rise and the inflow water flow;
determining a power output gear of the gas water heater according to the theoretical heat load;
selecting one set of parameter boundaries from a plurality of sets of parameter boundaries to determine the first parameter range, the second parameter range, and the third parameter range in accordance with the power output gear; each group of the parameter boundaries includes upper bound values and lower bound values of the first parameter range, the second parameter range and the third parameter range.
6. The control method according to claim 1, wherein the step of controlling the first pressure boost module to increase the pressure of the gas in the rich-burn gas conduit and the step of controlling the second pressure boost module to increase the pressure of the gas in the lean-burn gas conduit, respectively, comprises:
controlling the first pressurization module to increase the pressure of the gas in the concentrated combustion gas pipeline to a first preset pressure and controlling the second pressurization module to increase the pressure of the gas in the weak combustion gas pipeline to a second preset pressure; wherein the first preset pressure is different from the second preset pressure.
7. The control method according to claim 6, characterized by further comprising:
acquiring the water inlet flow and the water inlet temperature of the gas water heater;
determining theoretical temperature rise according to the water inlet temperature and the water outlet set temperature;
determining theoretical heat load according to the theoretical temperature rise and the inflow water flow;
determining a power output gear of the gas water heater according to the theoretical heat load;
and determining a first preset pressure and a second preset pressure according to the power output gear.
8. A gas water heater, comprising:
a rich combustion gas line;
a light combustion gas pipeline;
the gas inlet pipeline is respectively communicated with the concentrated combustion gas pipeline and the light combustion gas pipeline so as to convey gas to the concentrated combustion gas pipeline and the light combustion gas pipeline;
the controllable valve module is arranged on the air inlet pipeline and used for controlling the gas flow of the air inlet pipeline;
the first pressurization module is arranged on the concentrated combustion gas pipeline and used for increasing the pressure of gas in the concentrated combustion gas pipeline;
the second pressurization module is arranged on the light combustion gas pipeline and used for increasing the pressure of gas in the light combustion gas pipeline;
a controller connected to the controllable valve module and the first and second pressure boosting modules, comprising a memory and a processor, which when executing a computer program implements the steps of the control method according to any of claims 1 to 7.
9. The gas water heater of claim 8, further comprising:
the water flow sensor is connected with the controller and is used for collecting the water inlet flow of the gas water heater;
the water temperature sensor is connected with the controller and used for collecting the water inlet temperature of the gas water heater;
and the gas flow sensor is connected with the controller and is used for collecting the gas flow of the gas inlet pipeline.
10. A control device for a gas water heater, comprising:
the parameter acquisition module is used for acquiring parameters of the gas combustion condition;
the first control module is used for respectively controlling the first pressurization module to increase the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurization module to increase the pressure of the gas in the light combustion gas pipeline if the gas combustion condition parameter is in a first parameter range, and controlling the first pressurization module to keep the pressure of the gas in the concentrated combustion gas pipeline and controlling the second pressurization module to keep the pressure of the gas in the light combustion gas pipeline until the gas combustion condition parameter is in a second parameter range;
the second control module is used for controlling the controllable valve module to reduce the gas flow of the gas inlet pipeline if the gas combustion condition parameter is in a third parameter range, and controlling the controllable valve module to keep the gas flow in the gas inlet pipeline until the gas combustion condition parameter is in the second parameter range; wherein the second parameter range is between the first parameter range and the third parameter range.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6866202B2 (en) * | 2001-09-10 | 2005-03-15 | Varidigm Corporation | Variable output heating and cooling control |
| CN1948854A (en) * | 2006-11-07 | 2007-04-18 | 艾欧史密斯(中国)热水器有限公司 | Fuel gas high efficiency water heater litre level changing method and variable litre level fuel gas high efficiency water heater |
| JP5469623B2 (en) * | 2011-02-15 | 2014-04-16 | リンナイ株式会社 | Forced air combustion system |
| CN102635863B (en) * | 2012-04-08 | 2015-01-14 | 威能(无锡)供热设备有限公司 | Burner and fuel gas hot water equipment adopting same |
| CN109028599B (en) * | 2018-07-10 | 2021-09-10 | 萍乡市慧成精密机电有限公司 | Supercharged gas water heater and control method thereof |
| CN110966764B (en) * | 2018-09-30 | 2022-11-15 | 青岛经济技术开发区海尔热水器有限公司 | Control method of supercharged gas water heater and gas water heater |
| CN109631316A (en) * | 2018-12-29 | 2019-04-16 | 北京理工大学 | A kind of gas heater and its control method |
| CN111397205B (en) * | 2019-01-02 | 2021-10-08 | 芜湖美的厨卫电器制造有限公司 | Gas furnace control method and device and computer storage medium |
| CN210399539U (en) * | 2019-04-29 | 2020-04-24 | 广东艾能燃控科技有限公司 | Booster-type gas proportional valve |
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