CN114279090B - 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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- CN114279090B CN114279090B CN202111648797.2A CN202111648797A CN114279090B CN 114279090 B CN114279090 B CN 114279090B CN 202111648797 A CN202111648797 A CN 202111648797A CN 114279090 B CN114279090 B CN 114279090B
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Abstract
The application discloses gas water heater and control method and device thereof, and the control method of the gas water heater comprises the following steps: acquiring a pressure value of the combustion cavity; determining a calorific value required by the gas water heater to maintain a target water temperature when a flue is blocked according to the pressure value of the combustion cavity; determining the rotating speed of a fan and the opening degree of a gas proportional valve, which are required by the gas water heater to maintain the target water temperature, according to the required heat value and the pressure value; and controlling the gas water heater according to the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve, so that the outlet water temperature of the gas water heater is constant at the target water temperature. When the flue of the gas water heater is blocked, the outlet water temperature is constant and is the target water temperature.
Description
Technical Field
The application relates to the technical field of gas water heaters, in particular to a gas water heater and a control method and device thereof.
Background
When the gas water heater is used, the problem of flue blockage is inevitable. At present, under the condition that the flue is blocked, the opening degree of a gas valve can be reduced, and the phenomenon that the flue is blocked due to aggravation of oxygen-deficient combustion of gas due to insufficient exhaust air quantity is avoided. However, when the opening degree of the gas valve is reduced, the fuel is reduced and the flue is clogged, so that the combustion is insufficient, and the outlet water temperature of the gas water heater is reduced.
Disclosure of Invention
The embodiment of the application provides a gas water heater and a control method and device thereof, and aims to ensure that the outlet water temperature is constant to be the target water temperature when a flue of the gas water heater is blocked.
In order to achieve the above object, an embodiment of the present application provides a control method for a gas water heater, the method including:
acquiring a pressure value of a combustion cavity;
when the pressure value of the combustion cavity is determined to block the flue, determining a calorific value required by the gas water heater to maintain the target water temperature;
determining the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve according to the heat value and the pressure value;
and controlling the gas water heater according to the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve so as to ensure that the outlet water temperature of the gas water heater is constant at the target water temperature.
Optionally, the determining the opening degree of a gas proportional valve required by the gas water heater to maintain the target water temperature according to the heat value and the pressure value comprises:
acquiring the increment of the fuel gas required for maintaining the calorific value under the pressure value;
determining the increasing opening degree of the gas proportional valve corresponding to the increasing amount;
and determining the opening degree of the gas proportional valve adjusted according to the increased opening degree as the opening degree of the gas proportional valve required by the gas water heater for maintaining the target water temperature.
Optionally, determining a rotation speed of a fan required by the gas water heater to maintain the target water temperature according to the heat value and the pressure value includes:
determining the opening degree of a gas proportional valve of the gas water heater according to the heat value and the pressure value;
acquiring a target rotating speed of a fan corresponding to the opening degree of the gas proportional valve and the pressure value;
and determining the target rotating speed as the rotating speed of the fan required for maintaining the target water temperature.
Optionally, before determining the rotation speed of a fan and the opening degree of a gas proportional valve required by the gas water heater to maintain the target water temperature according to the required heat value and the required pressure value, the method includes:
acquiring heat values obtained by adjusting the rotating speed of the fan and the opening degree of the gas proportional valve under different pressure values of the gas water heater;
and presetting the corresponding fan rotating speed and proportional valve opening adjusting curves of the gas water heater under different pressure values based on the heat value.
Optionally, the determining the calorific value required by the gas water heater to maintain the target water temperature includes:
acquiring the water outlet quantity, the water inlet temperature and the water outlet temperature of the gas water heater;
and determining the heat value according to the water yield, the water inlet temperature and the water outlet temperature.
Optionally, after controlling the gas water heater according to the rotation speed of the fan required by the gas water heater to maintain the target water temperature and the opening degree of the gas proportional valve, so that the outlet water temperature of the gas water heater is constant at the target water temperature, the method further includes:
and when the pressure value is greater than or equal to a first pressure threshold value, closing the gas water heater.
Optionally, determining flue blockage according to the pressure value of the combustion chamber comprises:
when the pressure value is larger than or equal to a second pressure threshold value, determining that the flue blockage occurs, wherein the first pressure threshold value is larger than the second pressure threshold value.
Optionally, before the step of obtaining the pressure value of the combustion chamber, the method further includes:
after the gas water heater is powered on, determining the altitude of the gas water heater;
and adjusting a control program of the gas water heater according to the altitude so as to operate according to the adjusted control program when the gas water heater is started.
In order to achieve the above object, another aspect of the present invention provides a control device for a gas water heater, having a control program for a gas water heater stored thereon, wherein the control program for a gas water heater, when executed by a processor, implements the control method for a gas water heater as described in any one of the above.
In addition, in order to achieve the above object, another aspect of the present application further provides a gas water heater, which includes a memory, a processor, and a control program of the gas water heater, stored on the memory and executable on the processor, wherein the processor implements the control method of the gas water heater as described above when executing the control program of the gas water heater.
In the method, the pressure value of a combustion cavity of the gas water heater is obtained, when the blockage of a flue is determined, the calorific value required by the gas water heater for maintaining the target water temperature is determined, the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve are determined according to the calorific value and the pressure value, the fan of the gas water heater is controlled to operate according to the rotating speed, and the opening degree of the proportional valve is controlled to be the opening degree. When the flue of the gas water heater is blocked, the operation of the fan and the proportional valve is controlled in a manner that the gas water heater obtains a heat value corresponding to the target water temperature, so that the constant outlet water temperature of the gas water heater is the target water temperature.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a gas water heater according to the present application;
FIG. 3 is a schematic flow chart illustrating an embodiment of a control method for a gas water heater according to the present application;
fig. 4 is a schematic diagram of an adjustment curve of the control method of the gas water heater of the present application.
The reference numbers indicate:
| reference numerals | Name(s) | Reference numerals | Name(s) |
| 10 | |
30 | |
| 20 | |
40 | |
| 21 | |
50 | Gas |
| 22 | Duckbill for taking | 60 | |
| 23 | |
70 | Water outlet temperature sensor |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a control device of a gas water heater in a hardware operating environment according to an embodiment of the present application.
As shown in fig. 1, the control device of the gas water heater may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001 described previously.
Those skilled in the art will appreciate that the configuration of the control of the gas water heater shown in fig. 1 does not constitute a limitation of the control of the gas water heater, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a control program of the gas water heater may be included in a memory 1005, which is one of computer-readable storage media.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for data communication with the background server; the user interface 1003 is mainly used for data communication with a client (user side); when the terminal is an air conditioner, the processor 1001 may be configured to call the control program of the gas water heater in the memory 1005, and perform the following operations:
acquiring a pressure value of a combustion cavity;
determining a calorific value required by the gas water heater to maintain a target water temperature when a flue is blocked according to the pressure value of the combustion cavity;
determining the rotating speed of a fan and the opening degree of a gas proportional valve, which are required by the gas water heater to maintain the target water temperature, according to the heat value and the pressure value;
and controlling the gas water heater according to the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve, so that the outlet water temperature of the gas water heater is constant at the target water temperature.
Based on the hardware architecture of the control device of the water heater, various embodiments of the control method of the water heater are provided. Alternatively, the system structure of the gas water heater according to the embodiments is as shown in fig. 2.
The gas water heater comprises a water flow sensor 10, a pressure detection system 20, a controller 30, a burner 40, a gas proportional valve 50, a fan 60, an outlet water temperature sensor 70 and an inlet water temperature sensor (not shown in the figure), wherein the pressure detection system 20 consists of a pressure sensor 21, a pressure sampling nozzle 22 and a pressure sampling pipe 23. The bottom of the combustor 40 is provided with a pressure taking nozzle 22, one end of the pressure taking nozzle 22 extends into a combustion cavity of the combustor 40, and the other end of the pressure taking nozzle is connected with the pressure sensor 21 through a rubber tube. The pressure sensor 21 comprises at least two pressure taking ports, one of the pressure taking ports is connected with the pressure taking nozzle 22 through a rubber pipe and used for obtaining a pressure value in a cavity of the combustor 40, and the other pressure taking port is exposed in the cavity of the whole combustor and used for obtaining a pressure value in the cavity of the gas water heater. In addition, the gas water heater may further include a controller 30, and the pressure sensor 21 may be connected to the controller 30 for signal transmission.
For example, the pressure sensor 21 may convert a pressure difference between the pressure value in the combustion chamber of the burner 40 and the pressure value in the combustion chamber of the burner 40 into a frequency to be sent to the controller 30 after acquiring the pressure value in the combustion chamber of the burner 40 and the pressure value in the combustion chamber of the water heater, so that the controller 30 operates according to the output information sent by the pressure sensor 21.
Alternatively, the controller 30 may be provided independently of the water heater, so that the user can flexibly adjust the operating parameters of the gas water heater according to his or her own needs.
In this embodiment, the controller 30 may also adjust the operation parameters of the gas water heater according to the pressure value in the cavity of the burner 40 acquired by the pressure taking nozzle 22.
Optionally, in this embodiment, the controller 30 may also adjust the operating parameters of the gas water heater according to the outlet water temperature sensor 70, the inlet water temperature sensor 70 and the water flow sensor 10, where the inlet water temperature sensor is disposed on the inlet water pipe of the gas water heater, the outlet water temperature sensor 70 is disposed on the outlet water pipe of the gas water heater, and the water flow sensor 10 is disposed on the inlet water pipe of the gas water heater.
In the present embodiment, adjusting the operating parameters of the gas water heater includes adjusting the gas proportional valve 50 and the fan 60. For example, the opening amplitude of the gas proportional valve can be adjusted according to the difference between the outlet water temperature sensor 70 and the inlet water temperature sensor.
Referring to fig. 3, fig. 3 is a schematic flow chart of an embodiment of the control method of the gas water heater of the present application.
The present application provides an embodiment of a method for controlling a gas water heater, and it should be noted that although a logical sequence is shown in the flow chart, in some cases, the steps shown or described may be performed in a different sequence than that shown or described herein.
The control method of the gas water heater comprises the following steps:
step S10, acquiring a pressure value of a combustion cavity;
the execution subject of this application is gas heater.
In this embodiment, after the gas water heater is started, the pressure value of the combustion chamber is directly obtained through the pressure sensor.
Optionally, in this application, can convert the pressure value of combustion chamber into signals such as frequency, voltage after gas heater acquires the pressure value, send to the controller, this is not injectd the form of pressure value in the application.
Step S20, determining a calorific value required by the gas water heater to maintain a target water temperature when the flue blockage is determined according to the pressure value of the combustion cavity;
the target water temperature is the outlet water temperature which needs to be kept when the flue of the gas water heater is blocked, and is consistent with the temperature before the blockage of the flue occurs.
When the water heater meets the blockage of the flue, compared with a normal combustion state, the air pressure in the combustion cavity can be increased, and the pressure value detected by the pressure detection system can also be increased. Therefore, whether the flue blockage occurs in the gas water heater can be determined by the pressure value fed back to the controller by the pressure detection system.
In this application, when the pressure value that receives is the pressure value of other forms, also can convert the corresponding default into according to with the pressure value and compare.
Optionally, in this embodiment, the pressure value is compared with a second pressure threshold, and when it is determined that the pressure value is greater than or equal to the second pressure threshold, it is determined that the flue of the gas water heater is blocked. And the second pressure threshold value is a critical value for determining whether the flue of the gas water heater is blocked. Through obtaining the pressure value of combustion chamber to when the pressure value is greater than or equal to the second pressure threshold value, confirm that gas heater takes place the flue and block up, can the accurate flue that takes place who confirms gas heater and block up.
It can be understood that when the gas water heater is blocked in a flue, the pressure in the combustion cavity is increased, the internal resistance of the combustion system is also increased, the opening of the combustion proportional valve is kept unchanged, and the gas quantity sprayed out by the nozzle of the combustion system is reduced after the air blockage occurs. And, because there is a large amount of gas (for example, CO) that the complete combustion produced in the combustion chamber not, lead to the leading-in oxygen content of fan to descend, further aggravated the insufficient problem of gas combustion to lead to gas heater leaving water temperature to reduce, reduce user and use experience. Thus, in the present embodiment, when it is determined that the flue of the gas water heater is clogged, the calorific value required to maintain the target water temperature is acquired.
Step S30, determining the rotating speed of a fan and the opening degree of a gas proportional valve, which are required by the gas water heater to maintain the target water temperature, according to the heat value and the pressure value;
and S40, controlling the gas water heater according to the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve, so that the outlet water temperature of the gas water heater is constant at the target water temperature.
After the gas water heater obtains the calorific value required for maintaining the target temperature, the rotating speed of a fan required for maintaining the target water temperature and the opening degree of a gas proportional valve are determined according to the pressure value and the calorific value of the combustion cavity.
Specifically, in the present application, the step of determining the opening of the gas proportional valve according to the calorific value and the pressure value includes:
step S21, acquiring the increment of the fuel gas required for maintaining the calorific value under the pressure value;
step S22, determining the increasing opening degree of the gas proportional valve corresponding to the increasing amount;
and S23, determining the opening degree of the gas proportional valve adjusted according to the increased opening degree as the opening degree of the gas proportional valve required by the gas water heater for maintaining the target water temperature.
It can be understood that, under the same pressure value (the same pressure in the combustion chamber), the resistance to the combustion system is the same, but because the initial opening degree of the gas proportional valve is different under different heat values, the reduction amount of the gas sprayed out of the combustion system is different relative to the situation that the flue is not blocked, and the increase amount of the gas to be supplemented is different.
Therefore, in the embodiment, the increase amount of the gas required by the gas water heater under different pressure values for maintaining different calorific values can be obtained through experimental data. For example, the pressure value and the heat value can be used as input layers of the input deep learning network model, the output result of the output layer is obtained, the parameters of the neural network model are adjusted according to the difference between the gas increment in the experimental data and the output result, and the training model is determined to be obtained until the difference between the output result of the output layer of the neural network model and the gas increment obtained by the experimental data meets a preset range. And determining a mapping table of the increasing opening degree of the gas proportional valve corresponding to each gas increasing amount.
After determining that a flue of the gas water heater is blocked, acquiring a pressure value of a combustion cavity and a heat value required by the gas water heater to maintain a target water temperature, inputting the pressure value and the heat value into an input layer of a training model, determining that an output result is an increment of gas required by the gas water heater to maintain the heat value under the pressure value, and determining an increment opening corresponding to the increment according to a mapping table. Further, the opening degree of the gas proportional valve adjusted according to the increased opening degree is determined as the opening degree of the gas proportional valve required for the gas water heater to maintain the target water temperature. In the embodiment, the opening degree of the gas proportional valve required by the gas water heater to maintain the target water temperature is determined according to the heat value and the pressure value, so that the gas quantity sprayed out by the combustion system meets the requirement of the gas water heater to maintain the target water temperature when a flue of the gas water heater is blocked.
Further, in the embodiment, the rotation speeds of the gas water heater corresponding to the fans under different pressure values and gas proportional valve openings are stored through experimental data. When the gas water heater is determined to have the blocked flue, the rotating speed of the fan is determined according to the opening of the gas proportional valve and the pressure value, so that the opening of the gas proportional valve is correspondingly adjusted according to the rotating speed of the fan, and the blocked flue degree of the gas water heater is reduced.
Controlling the gas water heater according to the rotating speed of the fan required by the gas water heater for maintaining the target water temperature and the opening degree of the gas proportional valve, so that the outlet water temperature of the gas water heater is constant at the target water temperature, and then the method further comprises the following steps:
and when the pressure value is greater than or equal to a first pressure threshold value, closing the gas water heater to ensure the use safety.
The first pressure threshold value is a value for judging whether to continuously start the gas water heater when a flue is blocked, and the first pressure threshold value is larger than the second pressure threshold value. It can be understood that, after the flue blockage occurs, if the gas water heater continues to work, the pressure value of the combustion cavity can be continuously increased under the condition that the blockage degree of the flue is not relieved, and after the pressure value reaches the limit, the pressure difference value inside and outside the combustion cavity is large, so that the service life of the gas water heater is influenced; and because a large amount of gases such as CO exist in the combustion cavity of the gas water heater, the problem of safe use exists. In the embodiment, when the pressure value is greater than or equal to the first pressure threshold value, the service life of the gas water heater can be prolonged by turning off the gas water heater, and the use safety is ensured.
Optionally, the gas water heater may further include a display module, the pressure value of the combustion chamber is detected in real time or at regular time, and when the pressure value is greater than or equal to the first pressure threshold value and it is determined that the flue blockage degree exceeds the safety range, the gas water heater may further display a fault code indicating the flue blockage through the display module to remind a user.
In this embodiment, a pressure value of a combustion cavity of the gas water heater is obtained, when it is determined that a flue is blocked, a calorific value required by the gas water heater to maintain a target water temperature is determined, a rotation speed of a fan required by the gas water heater to maintain the target water temperature and an opening degree of a gas proportional valve are determined according to the calorific value and the pressure value, the fan of the gas water heater is controlled to operate according to the rotation speed, and a magnitude of opening of the proportional valve is controlled to be the opening degree. When the flue of the gas water heater is blocked, the operation of the fan and the proportional valve is controlled in a mode that the gas water heater obtains the heat value corresponding to the target water temperature, and the purpose that the outlet water temperature of the gas water heater is constant to be the target water temperature is achieved.
Based on the above embodiments, the present application proposes still another embodiment. Before determining the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve according to the required heat value and the pressure value, the method comprises the following steps:
step S21, acquiring calorific values obtained by adjusting the rotating speed of the fan and the opening degree of the gas proportional valve under different pressure values of the gas water heater;
and S22, presetting the corresponding fan rotating speed and proportional valve opening adjusting curves of the gas water heater under different pressure values based on the heat value.
In the application, the rotating speed of the fan of the gas water heater under different pressure values and the heat value obtained by the opening of the gas proportional valve can be obtained through experimental data, and based on the heat value, the rotating speed of the fan and the adjusting curve of the opening of the gas water heater under each pressure value are preset when the gas water heater is blocked (refer to fig. 4, wherein fig. 4 is the adjusting curve corresponding to the heat value of 4.2 × 105J). In fig. 4, the horizontal axis P represents the pressure value, the vertical axis Q represents the rotation speed of the fan, and the vertical axis R represents the opening degree of the gas proportional valve. In the process of using the gas water heater, under the condition that the target water temperature, the water yield and the inlet water temperature are kept unchanged, determining the opening degree of a gas proportional valve as RA and the rotating speed of a fan as QA according to the obtained pressure value PA; and when the pressure value is detected to be increased to PB, determining that the opening of the gas proportional valve is RB and the rotating speed of the fan is QB.
In the application, a plurality of adjusting curves exist, and the adjusting curves correspond to the rotating speed of the fan and the opening degree of the fuel gas proportional valve which need to be adjusted under different pressure values without heat values.
In the embodiment, the rotating speed of the fan of the gas water heater under different heat values and pressure values and the opening degree of the gas proportional valve are obtained, the corresponding adjusting curve of the gas water heater under different heat values is obtained according to the rotating speed of the fan and the opening degree of the gas proportional valve, and the accuracy of maintaining the target water temperature by adjusting the opening degree of the proportional valve and the rotating speed of the fan is improved.
In the application, the heat value can be calculated by acquiring the water outlet quantity, the water inlet temperature and the water outlet temperature (target water temperature) of the gas water heater. The calculation formula is as follows: the heat value Z0= (T02-T01) × L0, where the inlet water temperature is T01, the outlet water temperature (target water temperature) is T02, and the water flow rate is L0. In this embodiment, the adjustment curve for adjusting the rotating speed of the fan and the opening of the fuel gas proportional valve is determined according to the heat value, so that the rotating speed of the fan and the opening of the proportional valve corresponding to the heat value can be accurately obtained, and a basis is provided for maintaining the target water temperature to be constant.
Based on the above embodiment, the present application proposes yet another embodiment. Before the step of obtaining the pressure value of the combustion chamber, the method further comprises the following steps:
step S01, after the gas water heater is powered on, determining the altitude of the gas water heater;
and S02, adjusting a control program of the gas water heater according to the altitude so as to operate according to the adjusted control program when the gas water heater is started.
In this embodiment, after the gas water heater is powered on, a pressure value obtained by the pressure sensor according to the detected atmospheric pressure can be obtained, and it can be understood that the pressure value is obtained through the pressure taking port exposed in the cavity of the whole gas water heater. And determining a corresponding control program when the gas water heater is in a standby state after being electrified. And when the gas water heater is started, controlling the gas water heater to run by using a control program.
In the embodiment, after the gas water heater is powered on, the altitude where the gas water heater is located is determined, the control program corresponding to the altitude is obtained, and the gas water heater is controlled to operate according to the application program, so that the operation parameters of the gas water heater can correspond to the altitude, the gas water heater is controlled to operate in the optimal state under different altitudes, and the problems of combustion faults and the like are avoided.
In order to achieve the above object, another aspect of the present invention provides a control device for a gas water heater, having a control program for a gas water heater stored thereon, wherein the control program for a gas water heater, when executed by a processor, implements the control method for a gas water heater as described in any one of the above.
In addition, in order to achieve the above object, another aspect of the present application further provides a gas water heater, which includes a memory, a processor, and a control program of the gas water heater, stored on the memory and executable on the processor, where the processor implements the control method of the gas water heater as described above when executing the control program of the gas water heater.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the word target, second, third, etc. does not denote any order. These words may be interpreted as names.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A control method of a gas water heater is characterized by comprising the following steps:
acquiring a pressure value of the combustion cavity;
determining a calorific value required by the gas water heater to maintain a target water temperature when a flue is blocked according to the pressure value of the combustion cavity;
determining the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve according to the heat value and the pressure value;
controlling the gas water heater according to the rotating speed of a fan required by the gas water heater for maintaining the target water temperature and the opening degree of a gas proportional valve so as to enable the outlet water temperature of the gas water heater to be constant at the target water temperature;
wherein determining the opening degree of a gas proportional valve required by the gas water heater to maintain the target water temperature according to the heat value and the pressure value comprises:
acquiring the increment of the fuel gas required for maintaining the calorific value under the pressure value;
determining the increasing opening degree of the gas proportional valve corresponding to the increasing amount;
determining the opening degree of the gas proportional valve adjusted according to the increased opening degree as the opening degree of the gas proportional valve required by the gas water heater for maintaining the target water temperature;
determining the rotating speed of a fan required by the gas water heater to maintain the target water temperature according to the heat value and the pressure value, wherein the method comprises the following steps:
determining the opening degree of a gas proportional valve of the gas water heater according to the heat value and the pressure value;
acquiring a target rotating speed of a fan corresponding to the opening degree of the gas proportional valve and the pressure value;
and determining the target rotating speed as the rotating speed of the fan required for maintaining the target water temperature.
2. The control method of the gas water heater according to claim 1, wherein before determining the rotation speed of the fan required by the gas water heater to maintain the target water temperature and the opening degree of the gas proportional valve according to the required heat value and the required pressure value, the method comprises the following steps:
acquiring heat values obtained by adjusting the rotating speed of the fan and the opening of the gas proportional valve under different pressure values of the gas water heater;
and presetting the corresponding fan rotating speed and proportional valve opening adjusting curves of the gas water heater under different pressure values based on the heat values.
3. The control method of a gas water heater as claimed in claim 1, wherein said determining the calorific value required for the gas water heater to maintain the target water temperature comprises:
acquiring the water outlet quantity, the water inlet temperature and the water outlet temperature of the gas water heater;
and determining the heat value according to the water yield, the water inlet temperature and the water outlet temperature.
4. The method for controlling a gas water heater according to claim 1, wherein the step of controlling the gas water heater according to the rotation speed of the fan required by the gas water heater to maintain the target water temperature and the opening degree of the gas proportional valve so that the outlet water temperature of the gas water heater is constant at the target water temperature further comprises the steps of:
and when the pressure value is greater than or equal to a first pressure threshold value, closing the gas water heater.
5. The method of controlling a gas water heater according to claim 1, wherein determining a flue blockage based on the pressure value of the combustion chamber comprises:
when the pressure value is larger than or equal to a second pressure threshold value, determining that the flue blockage occurs, wherein the first pressure threshold value is larger than the second pressure threshold value.
6. The method for controlling a gas water heater according to claim 1, wherein said step of obtaining a pressure value of the combustion chamber is preceded by the step of:
after the gas water heater is powered on, determining the altitude of the gas water heater;
and adjusting a control program of the gas water heater according to the altitude so as to operate according to the adjusted control program when the gas water heater is started.
7. A control device of a gas water heater, characterized in that a control program of the gas water heater is stored thereon, and the control program of the gas water heater is executed by a processor to realize the control method of the gas water heater according to any one of claims 1 to 6.
8. A gas water heater, comprising a memory, a processor and a control program of the gas water heater stored in the memory and operable on the processor, wherein the processor implements the control method of the gas water heater according to any one of claims 1 to 6 when executing the control program of the gas water heater.
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| CN107525265A (en) * | 2016-06-22 | 2017-12-29 | 华帝股份有限公司 | Blowing type gas water heater adopting flame temperature detection and wind speed compensation |
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| CN113028652A (en) * | 2021-04-03 | 2021-06-25 | 中山百得厨卫有限公司 | Water heater control method based on wind pressure sensor and water heater |
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| KR101601709B1 (en) * | 2014-04-22 | 2016-03-10 | 주식회사 경동나비엔 | Method for sensing exhaust port closure of gas boiler |
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| CN104422141A (en) * | 2013-09-02 | 2015-03-18 | 海尔集团公司 | Method for controlling gas water heater adaptable to different altitudes |
| CN107525265A (en) * | 2016-06-22 | 2017-12-29 | 华帝股份有限公司 | Blowing type gas water heater adopting flame temperature detection and wind speed compensation |
| CN109373567A (en) * | 2018-11-02 | 2019-02-22 | 华帝股份有限公司 | Flue blockage protection device and detection method for gas water heater |
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