CN114151975B - Gas water heater and control method and control device thereof - Google Patents
Gas water heater and control method and control device thereof Download PDFInfo
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- CN114151975B CN114151975B CN202111425610.2A CN202111425610A CN114151975B CN 114151975 B CN114151975 B CN 114151975B CN 202111425610 A CN202111425610 A CN 202111425610A CN 114151975 B CN114151975 B CN 114151975B
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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 invention relates to a gas water heater, a control method and a control device thereof. The gas water heater comprises a fan, a water inlet temperature sensor, a water outlet temperature sensor, a water flow sensor, a gas proportional valve and a controller. The water inlet temperature sensor is arranged on the cold water inlet pipe and is used for acquiring the water inlet temperature of the cold water. The water outlet temperature sensor is arranged on the hot water outlet pipe and used for acquiring the water outlet temperature of the hot water. The water flow sensor is arranged on the cold water inlet pipe or the hot water outlet pipe. When the working thermal load is larger than the critical thermal load, a constant current working mode is adopted, so that the device can be better adapted to external wind pressure and has better wind pressure resistance. When the working heat load is smaller than the critical heat load, a constant rotation speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a gas water heater, a control method and a control device thereof.
Background
In the conventional constant temperature gas water heater technology, in order to match the combustion air quantity with the gas quantity, a direct current adjustable speed fan is generally adopted. There are generally two control methods for adjusting the air volume, a constant current (also called constant power) control method and a constant rotation speed control method.
For the constant current control method, the voltage is generally unchanged, the power is also constant, the output of the fan is generally unchanged, the rotating speed can be controlled stably, the air output is also stable, and when the system resistance is increased (the conditions of flue blockage, external natural wind and the like), the fan actively accelerates the wind adding due to the constant current state, so that the stable operation of the gas water heater is facilitated, and the combustion is more sufficient. However, since the internal resistance of each fan cannot be identical, a slight difference in terms of copper coils, magnets and the like may cause a slight difference in fan speeds corresponding to the same current between different fans, and such a difference may also be exhibited at different ambient temperatures, which may cause that a predetermined good current may not give a predetermined good speed. In addition, in the mass production process of the gas water heater, the consistency is poor, some fans can well give preset rotating speeds, some fans have obvious rotating speed differences, and the combustion product emission results are often unsatisfactory and the combustion effect is unstable.
For the constant rotation speed control method, the rotation speed of the fan of the gas water heater can be controlled accurately, and the rotation speed of the fan is not influenced by the consistency of the fan and the environmental temperature. However, a part of wind pressure resistance (i.e., resistance to flue blockage or external natural wind) is lost, and when external natural wind or smoke tube blockage is encountered, the rotation speed of the fan cannot be actively changed to ensure sufficient combustion of fuel gas.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a control method of the gas water heater, which can not only keep stable performance under the conditions of mass production consistency and different environment temperatures, but also automatically increase the air quantity under the condition of increasing external resistance so as to ensure good combustion working conditions.
The second technical problem to be solved by the invention is to provide a control device of the gas water heater, which can not only keep stable performance under the conditions of mass production consistency and different environment temperatures, but also automatically increase the air quantity under the condition of increasing external resistance so as to ensure good combustion working conditions.
The first technical problem is solved by the following technical scheme:
in one embodiment, a control method of a gas water heater includes the steps of:
Acquiring a cold water inlet temperature and a water yield, and acquiring a set hot water outlet temperature;
obtaining a working heat load according to the cold water inlet temperature, the water production flow and the set hot water outlet temperature;
comparing the working heat load with a critical heat load, and controlling the fan (10) to operate in a constant current working mode when the working heat load is larger than the critical heat load; and when the working heat load is smaller than the critical heat load, controlling the fan (10) to operate in a constant-rotating-speed working mode.
Compared with the background technology, the control method of the gas water heater has the following beneficial effects:
according to the control method of the gas water heater, when the working heat load is larger than the critical heat load, the requirement of a higher heat load point of the gas water heater on the rotating speed precision of the fan is not high, the consistency deviation of the fan and the deviation caused by the ambient temperature cannot influence the combustion performance, but the combustion performance of the gas water heater is easily influenced once the condition of increasing the external resistance occurs due to the fact that the heat load is large at the points. Therefore, when the working thermal load is larger than the critical thermal load, a constant current working mode is adopted, so that the device can better adapt to external wind pressure and has better wind pressure resistance. In addition, when the working heat load is smaller than the critical heat load, the lower heat load point of the gas water heater has small air quantity and low fan rotating speed, so that the combustion performance is influenced by slight fan rotating speed deviation. At this time, the consistency of the fan and the influence of the ambient temperature are easy to cause poor combustion performance. Therefore, when the working heat load is smaller than the critical heat load, a constant-rotation-speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
In one embodiment, the method further comprises the following steps before the step of obtaining the cold water inlet temperature, the hot water outlet temperature and the water production flow:
obtaining ideal current and ideal rotating speed of the fan under the condition of no external resistance according to the working thermal load and the first relation table;
and controlling the fan to operate according to the ideal current and the ideal rotating speed.
In one embodiment, the method for obtaining the first relationship table includes: under the condition that the fan does not encounter external resistance, testing the gas water heater, and taking complete combustion of combustion products as a target, and acquiring a plurality of test currents and a plurality of test rotating speeds corresponding to a plurality of test heat loads with different sizes; the first relationship table is derived from a plurality of test thermal loads, a plurality of test currents, and a plurality of test rotational speeds.
In one embodiment, when the fan is operated in a constant current operation mode, the control method of the gas water heater further comprises the steps of:
step S410, according to Q x And s, and a second relation table to obtain a corresponding current parameter i x-s And fan rotational speed parameter n x-s Wherein the magnitude of the workload is denoted as Q x S has an initial value of 0;
Step S420, obtaining the actual rotating speed of the fan;
step S430, judging whether the actual rotating speed of the fan is greater than n x-s And J n Is a product of (2);
step S440, when judging that the actual rotation speed of the fan is greater than n x-s And J n When the product of (1) is obtained, the fan is controlled to have current i x-(s+1) Run, and after S is replaced with s+1, go to step S410.
In one embodiment, the control method of the gas water heater further comprises the steps of:
step S450, when judging that the actual rotating speed of the fan is not more than n x-s And J n When the product of the number of the fan and the actual rotating speed is smaller than n x-s And K is equal to n Is a product of (2);
step S460, when judging that the actual rotating speed of the fan is less than n x-s And K is equal to n When the product of (1) is obtained, the fan is controlled to have current i x-(s-1) Running, and after S is replaced by S-1, proceeding to step S410; when the actual rotating speed of the fan is not less than n x-s And K is equal to n When the product of (2) is obtained, the process proceeds directly to step S410.
In one embodiment, the steps between step S430 and step S440 further include:
step S470, judging whether the actual rotation speed of the fan exceeds n x-p And when the actual rotation speed of the fan exceeds n x-p If the actual rotation speed of the blower does not exceed n, the process proceeds to step S480 x-p Step S440 is performed, wherein n x-p For fan at work heat load Q x The corresponding protection rotation speed;
step S480, stopping the gas water heater to carry out a protection state.
In one embodiment, when the fan is operated in the constant rotation speed working mode, the control method of the gas water heater further comprises the following steps:
step S510, according to Q x And s, and a third relation table to obtain a corresponding current parameter i x-s And fan rotational speed parameter n x-s Wherein the magnitude of the workload is denoted as Q x S has an initial value of 0;
step S520, obtaining the actual current of the fan;
step S530, judging whether the actual current to the fan is lower than i x-s And J i Is a product of (2);
step S540, when judging that the actual current of the fan is lower than i x-s And J i When the product of (2) is multiplied, the fan is controlled to wind speed n x-(s+1) Run, and after S is replaced with s+1, go to step S410.
In one embodiment, the control method of the gas water heater further comprises the steps of:
step S550, when judging that the actual current of the fan is not lower than i x-s And J i When the product of (2) is obtained, continuously judging whether the actual current of the fan is higher than i x-s And J i Is a product of (2);
step S560, when judging that the actual current of the fan is higher than i x-s And J i When the product of (2) is multiplied, the fan is controlled to wind speed n x-(s-1) Running, and after S is replaced by S-1, entering step S510; when judging that the actual current of the fan is not higher than i x-s And K is equal to i When the product of (c) is obtained, the process proceeds directly to step S510.
In one embodiment, the steps between step S530 and step S540 further include:
step S570, judging whether the actual current of the fan is lower than i x-p And when the actual current of the fan is lower than i x-p Step S580 is performed when the actual current of the fan is not lower than i x-p The process proceeds to step S540, where i x-p For fan at work heat load Q x The corresponding protection current;
and step S580, stopping the gas water heater to carry out a protection state.
The third technical problem is solved by the following technical scheme:
a control device of a gas water heater, the control device of the gas water heater comprising:
the first acquisition module is used for acquiring the cold water inlet temperature;
the second acquisition module is used for acquiring the temperature of hot water outlet water;
the third acquisition module is used for acquiring the water production flow;
the control module is used for obtaining a working heat load according to the cold water inlet temperature, the hot water outlet temperature and the water production flow, and determining that the fan operates in a constant current working mode or a constant rotating speed working mode according to the comparison result of the working heat load and the critical heat load.
Compared with the background technology, the control device of the gas water heater has the beneficial effects that:
the control device of the gas water heater adopts a constant current working mode when the working heat load is larger than the critical heat load, can better adapt to external wind pressure, and has better wind pressure resistance. When the working heat load is smaller than the critical heat load, a constant rotation speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
The gas water heater comprises a fan, a water inlet temperature sensor, a water outlet temperature sensor, a water flow sensor, a gas proportional valve and a controller, wherein the controller is respectively and electrically connected with the fan, the water inlet temperature sensor, the water outlet temperature sensor, the water flow sensor and the gas proportional valve; the controller comprises a memory storing a computer program and a processor implementing the steps of the method when the processor executes the computer program.
Compared with the background technology, the gas water heater has the beneficial effects that:
the gas water heater adopts a constant current working mode when the working heat load is larger than the critical heat load, can better adapt to external wind pressure, and has better wind pressure resistance. When the working heat load is smaller than the critical heat load, a constant rotation speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a control device of a gas water heater according to an embodiment of the present invention;
FIG. 3 is a graph of heat load versus fan current for a fan without encountering external resistance in accordance with an embodiment of the invention;
FIG. 4 is a graph of heat load versus fan speed for an embodiment of the present invention where the fan is not experiencing external drag;
FIG. 5 is a schematic diagram of a second relationship table of a gas water heater according to an embodiment of the present invention at a certain working heat load;
FIG. 6 is a schematic diagram of a third relationship table of a gas water heater according to an embodiment of the present invention at a certain working heat load;
FIG. 7 is a flow chart of a control method of a gas water heater according to an embodiment of the invention;
FIG. 8 is a flow chart of a control method of a gas water heater according to another embodiment of the invention;
FIG. 9 is a flow chart of a control method of a gas water heater according to another embodiment of the invention.
Reference numerals:
10. a blower; 11. a rotational speed feedback interface; 12. a current feedback interface; 13. a drive interface; 20. a water inlet temperature sensor; 30. a water outlet temperature sensor; 40. a water flow sensor; 50. a fuel gas proportional valve; 60. a controller; 61. a sensor interface; 62. a control chip; 63. a driving circuit; 71. a cold water inlet pipe; 72. a hot water outlet pipe; 73. a gas delivery pipe; 74. a burner; 75. a heat exchanger; 76. and (5) a fume collecting hood.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described 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 herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element.
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 should be understood as "electrical connection", "communication connection", and the like if there is transmission of electrical signals or data between objects to be connected.
In one embodiment, as shown in FIG. 1, a gas water heater is provided, the gas water heater comprising a fan 10, a water inlet temperature sensor 20, a water outlet temperature sensor 30, a water flow sensor 40, a gas proportional valve 50 and a controller 60. The water inlet temperature sensor 20 is disposed on the cold water inlet pipe 71 for acquiring the temperature of the cold water inlet. The outlet water temperature sensor 30 is disposed on the hot water outlet pipe 72 for acquiring the outlet water temperature of the hot water. The water flow sensor 40 is disposed on the cold water inlet pipe 71 or the hot water outlet pipe 72 for obtaining the water flow. The gas proportional valve 50 is provided on the gas delivery pipe 73 for controlling the gas flow rate. The controller 60 is electrically connected to the fan 10, the water inlet temperature sensor 20, the water outlet temperature sensor 30, the water flow sensor 40, and the gas proportional valve 50, and the controller 60 is configured to obtain a working heat load according to the cold water inlet temperature, the hot water outlet temperature, and the produced water flow, and determine that the fan 10 operates in a constant current working mode or in a constant rotation speed working mode according to a comparison result of the working heat load and the critical heat load.
The gas water heater adopts a constant current working mode when the working heat load is larger than the critical heat load, can better adapt to external wind pressure, and has better wind pressure resistance. When the working heat load is smaller than the critical heat load, a constant rotation speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
Referring to fig. 1 again, the fan 10 is specifically a blower fan, and of course, the fan 10 may also be a forced-air fan.
Referring to fig. 1 and 2, in one embodiment, a fan 10 is provided with a rotation speed feedback interface 11, a current feedback interface 12 and a driving interface 13. In addition, the controller 60 includes a sensor interface 61, a control chip 62, and a driving circuit 63. The control chip 62 is electrically connected to the sensor interface 61 and the driving circuit 63, respectively. The sensor interface 61 is electrically connected with the water flow sensor 40, the water inlet temperature sensor 20, the water outlet temperature sensor 30, the rotation speed feedback interface 11 and the current feedback interface 12 respectively. The driving circuit 63 is electrically connected to the driving interface 13 and the gas proportional valve 50, respectively. In this way, the actual rotation speed of the fan 10 is transmitted to the controller 60 through the rotation speed feedback interface 11 and the sensor interface 61, and the controller 60 can timely acquire the actual rotation speed of the fan 10; in addition, the actual current of the fan 10 is transmitted to the controller 60 through the current feedback interface 12 and the sensor interface 61, and the controller 60 can timely acquire the actual current of the fan 10; in addition, the water flow sensor 40 obtains the water yield, the water inlet temperature sensor 20 obtains the cold water inlet temperature and the water outlet temperature sensor 30 sends the hot water outlet temperature to the controller 60; the controller 60 can control the fan 10 to increase the rotating speed or reduce the current through the driving circuit 63 and the driving interface 13, and can control the gas proportional valve 50 to adjust the opening degree through the driving circuit 63.
Referring to fig. 1 and 2, the gas water heater further includes a burner 74, a heat exchanger 75, and a fume collection hood 76. In specific operation, cold water enters the heat exchanger 75 through the cold water inlet pipe 71, meanwhile, fuel gas enters the burner 74 through the fuel gas proportional valve 50 and the fuel gas conveying pipe 73 for combustion, heat generated by combustion of the fuel gas in the burner 74 heats the heat exchanger 75, and the heat exchanger 75 can heat the cold water into hot water and then discharge the hot water outwards through the hot water outlet pipe 72. Meanwhile, when the fan 10 works, the fan 10 blows outside air into the combustion chamber, secondary air can be provided for gas combustion of the burner 74, high-temperature flue gas generated by gas combustion can be blown into the fume collecting hood 76, and the fume collecting hood 76 is used for collecting the high-temperature flue gas and then discharging the high-temperature flue gas outwards.
Referring to fig. 7, in one embodiment, a control method of a gas water heater includes the following steps:
step S100, obtaining ideal current and ideal rotating speed of the fan 10 under the condition of no external resistance according to a set heat load and first relation table;
step 200, controlling the fan 10 to operate according to the ideal current and the ideal rotating speed;
step S310, acquiring cold water inlet temperature and water yield, and acquiring set hot water outlet temperature;
Step S320, obtaining a working heat load according to the cold water inlet temperature, the water production flow and the set hot water outlet temperature;
step S330, comparing the working heat load with the critical heat load, when the working heat load is larger than the critical heat load, entering into step S400, and when the working heat load is smaller than the critical heat load, entering into step S500;
step 400, when the working thermal load is greater than the critical thermal load, controlling the fan 10 to operate in a constant current working mode;
and S500, when the working heat load is smaller than the critical heat load, controlling the fan 10 to operate in a constant-rotation-speed working mode.
The heat load is related to the gas combustion energy when the gas water heater is operated, specifically, the heat load is related to the cold water inlet temperature, the hot water outlet temperature and the water production flow of the gas water heater, and when the gas combustion energy of the gas water heater is higher, the heat load is higher.
Correspondingly, the working thermal load is the thermal load set by a user according to the actual demand of the user, and the specific size is defined as Q Is provided with According to the actual water demand of users (including the set hot water outlet temperature T Is provided with And the hot water production flow rate L). I.e. work heat load Q Is provided with ＝(T Is provided with -T Feeding in )*C*L；T Is provided with The water outlet temperature T of the hot water set by a user Feeding in The cold water inlet temperature is represented, C is the specific heat capacity of water, and L represents the water flow.
Accordingly, the actual heat load is the heat load corresponding to the actual operation (e.g., the test heat load Q described below Test Belonging to the actual heat load), the specific size is defined as Q Actual practice is that of According to the actual working conditions (including the actual working hot water outlet temperature T Actual practice is that of Water flow rate L for producing hot water Actual practice is that of ) To determine. I.e. the actual heat load Q Actual practice is that of ＝(T Actual practice is that of -T Feeding in )*C*L；T Actual practice is that of The temperature of hot water outlet of actual work is represented by T Feeding in The cold water inlet temperature is represented, C is the specific heat capacity of water, and L represents the actual water flow.
It should be noted that, the external resistance, that is, the system resistance mentioned below, refers to, for example, resistance caused by blockage of a flue pipe to the air draft or exhaust of the fan 10, or resistance caused by natural wind existing outside the fan 10 to the air draft or exhaust of the fan 10.
When the working thermal load is the critical thermal load, the fan 10 may be controlled to operate in the constant current operation mode, or the fan 10 may be controlled to operate in the constant rotation speed operation mode, which is not limited herein and may be set according to actual requirements. In addition, the critical heat load is selected at a certain point between the full heat load sections, and the specific size is set according to actual requirements, for example, the critical heat load can be set in the area range of 1/4 to 1/3 of the full heat load sections.
According to the control method of the gas water heater, when the working heat load is larger than the critical heat load, the high heat load point of the gas water heater has low requirements on the rotating speed precision of the fan 10, the consistency deviation of the fan 10 and the deviation caused by the ambient temperature cannot influence the combustion performance, and on the contrary, the points are large in heat load, and once the condition of increasing external resistance occurs, the combustion performance of the gas water heater is easily influenced. Therefore, when the working thermal load is larger than the critical thermal load, a constant current working mode is adopted, so that the device can better adapt to external wind pressure and has better wind pressure resistance. In addition, when the working heat load is smaller than the critical heat load, the lower heat load point of the gas water heater is not high because the air quantity required at the moment is not large, and the rotating speed of the fan 10 is not high, so that the combustion performance is affected by a small rotating speed deviation of the fan 10. At this time, the consistency of the fan 10 and the influence of the ambient temperature are relatively easy to cause poor combustion performance. Therefore, when the working heat load is smaller than the critical heat load, a constant-rotation-speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
Referring to fig. 3 and fig. 4, in one embodiment, the method for obtaining the first relationship table includes: under the condition that the fan 10 does not encounter external resistance, testing the gas water heater, and taking complete combustion of combustion products as a target, obtaining a plurality of test currents and a plurality of test rotating speeds corresponding to a plurality of test heat loads with different magnitudes; a first relationship table is obtained based on the plurality of test heat loads, the plurality of test currents, and the plurality of test speeds.
When the coverage area of the test heat load is wider and the number of test heat loads is larger, the first relation table is obtained more accurately.
As an example, for example, the minimum value of the actual thermal load in the test is denoted as Q 1 And the maximum value of the actual thermal load in the test is denoted as Q A Selecting the minimum thermal load Q 1 Maximum heat load Q A Minimum thermal load Q 1 To maximum heat load Q A And 8 different heat loads are used as test heat loads, corresponding 10 test currents and 10 test rotating speeds are obtained according to the 10 test heat loads, then a coordinate system of Q-i shown in the figure is established by taking the heat load Q as an abscissa and the current i of the fan 10 as an ordinate, two adjacent points are connected into a straight line, and when the required heat load is between certain two points, the current of the fan 10 corresponding to the heat load point is calculated by a linear processing method. Similarly, the abscissa Q is the abscissa, and the rotation speed n of the blower 10 is the ordinate The label establishes a coordinate system of Q-n as shown in the figure, two adjacent points are connected into a straight line, and when the required heat load is between certain two points, the rotating speed of the fan 10 at the corresponding heat load point is calculated by a linear processing method. Thus, the total heat load section of the gas water heater can have more accurate rotating speed of the fan 10 and current of the fan 10.
Further, the critical thermal load is specifically selected, for example, as Q shown in fig. 3 and 4 B The work heat load is denoted as Q x I.e. when working heat load Q x At Q 1 To Q B When the speed is in the constant speed working mode, the fan 10 is controlled to operate in the constant speed working mode; when working heat load Q x At Q B To Q A And in between, the fan 10 is controlled to operate in a constant current mode of operation.
Referring to fig. 8, in one embodiment, when the fan 10 is operated in the constant current operation mode, the control method of the gas water heater further includes the steps of:
step S410, according to Q x And s, and a second relation table to obtain a corresponding current parameter i x-s And the rotational speed parameter n of the fan 10 x-s Wherein the magnitude of the workload is denoted as Q x S has an initial value of 0;
referring to fig. 5, it should be noted that the method for obtaining the second relationship table includes: the actual current i fed back by the fan 10 is made to be on a given target by adjusting the driving of the fan 10 with the current as the target. The current of the gas water heater can be constant at different values according to different system resistance degrees (flue blockage degree or external natural wind degree). By means of experiments, the system resistance of the water heater is gradually changed with the aim of good combustion conditions. Different currents and speeds are then obtained by adjusting the fan 10 drive. Each different system resistance is noted as S (S may be 0, 1, 2, 3, …, E, … P in order), with an initial value of 0. For example at a work heat load of Q x When the current and the rotating speed of the fan 10 without system resistance are i x-0 And n x-0 . After a bit of system resistance is increased, the driving of the fan 10 is changed to obtain smaller current with the aim of good combustion conditions. Wind powerThe current and speed exhibited by the machine 10 is recorded as i x-1 ，n x-1 . By analogy, the current point of the last fan 10 is denoted as i x-E . The current at the fan 10 is i x-E The gas water heater can work normally, and if the system resistance is increased, the gas water heater must be shut down in a self-protection way. The current will not be regulated any more at this time, the rotation speed of the fan 10 will be changed into n due to the increase of the system resistance x-p ，n x-p I.e. the rotational speed protection point, in the case of the current operating heat load, once the rotational speed of the fan 10 exceeds n x-p The gas water heater immediately performs an automatic protection stop locking operation.
Step S420, obtaining the actual rotation speed of the fan 10;
step S430, judging whether the actual rotation speed of the fan 10 is greater than n x-s And J n Is a product of (2);
wherein J is n Specifically, the number is empirically set to be larger than 1, for example, 1.05, which determines the sensitivity of the heavy load end of the gas water heater to actively increase the wind speed.
Step S440, when it is determined that the actual rotation speed of the fan 10 is greater than n x-s And J n When the product of (2) is obtained, the fan 10 is controlled to have the current i x-(s+1) Run, and after S is replaced with s+1, go to step S410.
In one embodiment, the control method of the gas water heater further comprises the steps of:
step S450, when judging that the actual rotation speed of the fan 10 is not greater than n x-s And J n When the product of (2) is obtained, continuing to judge whether the actual rotating speed of the fan 10 is smaller than n x-s And K is equal to n Is a product of (2);
wherein K is n Specifically, a number smaller than 1, for example, 0.95 is empirically set, which determines the sensitivity of the heavy load end of the gas water heater to actively reduce the wind speed.
Step S460, when the actual rotation speed of the fan 10 is determined to be less than n x-s And K is equal to n When the product of (2) is obtained, the fan 10 is controlled to have the current i x-(s-1) Running, and after S is replaced by S-1, proceeding to step S410; when it is judged that the actual rotation speed of the fan 10 is notLess than n x-s And K is equal to n When the product of (2) is obtained, the process proceeds directly to step S410.
In one embodiment, the steps between step S430 and step S440 further include:
step S470, determining whether the actual rotation speed of the fan 10 exceeds n x-p And when the actual rotation speed of the fan 10 exceeds n x-p If the actual rotation speed of the blower 10 does not exceed n, the process proceeds to step S480 x-p Step S440 is performed, wherein n x-p For fan 10 at operating thermal load Q x The corresponding protection rotation speed;
Step S480, stopping the gas water heater to carry out a protection state.
Referring to fig. 9, in one embodiment, when the fan 10 is operated in the constant rotation speed operation mode, the control method of the gas water heater further includes the steps of:
step S510, according to Q x And s, and a third relation table to obtain a corresponding current parameter i x-s And the rotational speed parameter n of the fan 10 x-s Wherein the magnitude of the workload is denoted as Q x S has an initial value of 0;
referring to fig. 6, it should be noted that the method for obtaining the third relationship table includes: the rotation speed is taken as a target, and the driving of the fan 10 is regulated so that the rotation speed n fed back by the fan 10 is on a set target. The rotating speed of the gas water heater can be constant at different values according to different system resistance degrees (flue blockage degree or external natural wind degree). Through the experimental mode, the system resistance of the gas water heater is changed by taking good combustion working conditions as targets. Different currents and speeds are then obtained by adjusting the fan 10 drive. Each different system resistance was noted as S (S was 0, 1, 2, 3, …, E, … P in order). For example at a work heat load of Q x When the current and the rotating speed of the fan 10 without system resistance are i x-0 And n x-0 . After a bit of system resistance is increased, the driving of the fan 10 is changed to obtain higher rotating speed by taking good combustion working condition as a target. The current and rotational speed exhibited by the fan 10 is recorded as i x-1 ，n x-1 . By analogy, the last fan 10 rotatesThe speed point is marked as n x-E . At a rotational speed of n of the blower 10 x-E The gas water heater can work normally, and if the system resistance is increased, the gas water heater must be shut down in a self-protection way. The rotation speed is not regulated any more at this time, and the current of the fan 10 is reduced to i due to the increase of the system resistance x-p 。i x-p I.e. the current protection point, in the present operating thermal load situation, once the current of the fan 10 is lower than i x-p The gas water heater immediately performs an automatic protection stop locking operation.
Step S520, obtaining the actual current of the fan 10;
step S530, judging whether the actual current to the fan 10 is lower than i x-s And J i Is a product of (2);
wherein J is i Specifically, a number smaller than 1, for example, 0.95 is empirically set, which determines the sensitivity of the small load end of the gas water heater to active wind.
Step S540, when judging that the actual current of the fan 10 is lower than i x-s And J i When the product of (2) is obtained, the fan 10 is controlled to wind speed n x-(s+1) Run, and after S is replaced with s+1, go to step S510.
In one embodiment, the control method of the gas water heater further comprises the steps of:
step S550, when it is determined that the actual current of the fan 10 is not lower than i x-s And J i When the product of (2) is obtained, continuing to judge whether the actual current of the fan 10 is higher than i x-s And J i Is a product of (2);
step S560, when judging that the actual current of the fan 10 is higher than i x-s And J i When the product of (2) is obtained, the fan 10 is controlled to wind speed n x-(s-1) Running, and after S is replaced by S-1, entering step S510; when the actual current of the fan 10 is judged not to be higher than i x-s And K is equal to i When the product of (c) is obtained, the process proceeds directly to step S510.
Wherein K is i Specifically, the number is empirically set to be more than 1, for example, 1.05, and the sensitivity of the small load end of the gas water heater to actively drop wind is determined.
In one embodiment, the steps between step S530 and step S540 further include:
step S570, judging whether the actual current of the fan 10 is lower than i x-p And when the actual current of the fan 10 is lower than i x-p Step S580 is performed when the actual current of the blower 10 is not lower than i x-p The process proceeds to step S540, where i x-p For fan 10 at operating thermal load Q x The corresponding protection current;
and step S580, stopping the gas water heater to carry out a protection state.
It should be understood that, although the steps in the flowcharts of fig. 7 to 9 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps of fig. 7-9 may include multiple steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily occur sequentially, but may be performed alternately or alternately with other steps or at least a portion of the steps or stages in other steps.
In one embodiment, a control device of a gas water heater, the control device of the gas water heater includes:
the first acquisition module is used for acquiring the cold water inlet temperature;
the second acquisition module is used for acquiring the temperature of the hot water outlet;
the third acquisition module is used for acquiring the water production flow;
the control module is used for obtaining the working heat load according to the cold water inlet temperature, the hot water outlet temperature and the water production flow, and determining that the fan 10 operates in a constant current working mode or a constant rotating speed working mode according to the comparison result of the working heat load and the critical heat load.
The control device of the gas water heater adopts a constant current working mode when the working heat load is larger than the critical heat load, can better adapt to external wind pressure, and has better wind pressure resistance. When the working heat load is smaller than the critical heat load, a constant rotation speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
The specific limitation of the control device of the gas water heater can be referred to the limitation of the control method of the gas water heater, and the description thereof is omitted herein. The above-mentioned various modules in the control device of the gas water heater can be implemented by all or part of software, hardware and their combination. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.
Referring to fig. 1 and 2, in one embodiment, a gas water heater includes a fan 10, a water inlet temperature sensor 20, a water outlet temperature sensor 30, a water flow sensor 40, a gas proportional valve 50, and a controller 60, wherein the controller 60 is electrically connected to the fan 10, the water inlet temperature sensor 20, the water outlet temperature sensor 30, the water flow sensor 40, and the gas proportional valve 50, respectively; the controller 60 comprises a memory storing a computer program and a processor which when executing the computer program performs the steps of:
Step S100, obtaining ideal current and ideal rotating speed of the fan 10 under the condition of no external resistance according to the working thermal load and the first relation table;
step 200, controlling the fan 10 to operate according to the ideal current and the ideal rotating speed;
step S300, comparing the working heat load with the critical heat load, entering step S400 when the working heat load is larger than the critical heat load, and entering step S500 when the working heat load is smaller than the critical heat load;
step 400, when the working thermal load is greater than the critical thermal load, controlling the fan 10 to operate in a constant current working mode;
and S500, when the working heat load is smaller than the critical heat load, controlling the fan 10 to operate in a constant-rotation-speed working mode.
The gas water heater adopts a constant current working mode when the working heat load is larger than the critical heat load, can better adapt to external wind pressure, and has better wind pressure resistance. When the working heat load is smaller than the critical heat load, a constant rotation speed working mode is adopted, so that the constant rotation speed and the constant air quantity of the gas water heater can be ensured under the condition that a non-flue is blocked or external natural air is generated. Once the condition of increasing external resistance occurs, the wind pressure resistance can be ensured to be good through different rotating speeds in the feeding stage.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of a computer program, which may be stored on a non-transitory computer readable storage medium and which, when executed, may comprise the steps of the above-described embodiments of the methods. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means 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, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (11)
1. The control method of the gas water heater is characterized by comprising the following steps of:
acquiring a cold water inlet temperature and a water yield, and acquiring a set hot water outlet temperature;
obtaining a working heat load according to the cold water inlet temperature, the water production flow and the set hot water outlet temperature;
comparing the working heat load with a critical heat load, and controlling the fan (10) to operate in a constant current working mode when the working heat load is larger than the critical heat load; when the working heat load is smaller than the critical heat load, controlling the fan (10) to operate in a constant-rotation-speed working mode; wherein the critical heat load is set to any one point value of 1/4 to 1/3 of the total heat load section.
2. The method for controlling a gas water heater according to claim 1, further comprising the steps of, prior to the step of obtaining the cold water inlet temperature, the hot water outlet temperature, and the produced water flow rate:
obtaining ideal current and ideal rotating speed of the fan (10) under the condition of no external resistance according to the working thermal load and the first relation table;
and controlling the operation of the fan (10) according to the ideal current and the ideal rotating speed.
3. The control method of a gas water heater according to claim 2, wherein the obtaining method of the first relation table includes: testing the gas water heater under the condition that the fan (10) does not encounter external resistance, and taking complete combustion of combustion products as a target to obtain a plurality of test currents and a plurality of test rotating speeds corresponding to a plurality of test heat loads with different magnitudes; the first relationship table is derived from a plurality of test thermal loads, a plurality of test currents, and a plurality of test rotational speeds.
4. A control method of a gas water heater according to claim 1, characterized in that when the fan (10) is operating in a constant current operation mode, the control method of a gas water heater further comprises the steps of:
step S410, according to Q x And s, and a second relation table to obtain a corresponding current parameter i x-s And a fan (10) rotational speed parameter n x-s Wherein the magnitude of the workload is denoted as Q x S has an initial value of 0;
step S420, obtaining the actual rotation speed of the fan (10);
step S430, judging whether the actual rotation speed of the fan (10) is greater than n x-s And J n Is a product of (2);
step S440, when judging that the actual rotation speed of the fan (10) is greater than n x-s And J n When the product of (2) is the same, the fan (10) is controlled to have the current i x-(s+1) Run, and after S is replaced with s+1, go to step S410.
5. The control method of a gas water heater according to claim 4, further comprising the steps of:
step S450, when judging that the actual rotation speed of the fan (10) is not more than n x-s And J n When the product of (2) is obtained, continuously judging whether the actual rotating speed of the fan (10) is smaller than n x-s And K is equal to n Is a product of (2);
step S460, when judging that the actual rotation speed of the fan (10) is smaller than n x-s And K is equal to n When the product of (2) is the same, the fan (10) is controlled to have the current i x-(s-1) Running, and after S is replaced by S-1, proceeding to step S410; when the actual rotating speed of the fan (10) is not less than n x-s And K is equal to n When the product of (2) is obtained, the process proceeds directly to step S410.
6. The control method of a gas water heater as recited in claim 4, further comprising the steps of:
Step S470, judging whether the actual rotation speed of the fan (10) exceeds n x-p And when the actual rotation speed of the fan (10) exceeds n x-p If the actual rotation speed of the fan (10) does not exceed n, the process proceeds to step S480 x-p Step S440 is performed, wherein n x-p For the fan (10) under the working thermal load Q x The corresponding protection rotation speed;
step S480, stopping the gas water heater to carry out a protection state.
7. A control method of a gas water heater according to claim 1, characterized in that when the fan (10) is operating in a constant rotation speed operation mode, the control method of a gas water heater further comprises the steps of:
step S510, according to Q x And s, and a third relation table to obtain a corresponding current parameter i x-s And a fan (10) rotational speed parameter n x-s Wherein the magnitude of the workload is denoted as Q x S has an initial value of 0;
step S520, obtaining the actual current of the fan (10);
step S530, judging whether the actual current to the fan (10) is lower than i x-s And J i Is a product of (2);
step S540, when judging that the actual current of the fan (10) is lower than i x-s And J i When the product of (2) is multiplied by (1), controlling the fan (10) to wind speed n x-(s+1) Run, and after S is replaced with s+1, go to step S410.
8. The control method of a gas water heater according to claim 7, further comprising the steps of:
Step S550, when judging that the actual current of the fan (10) is not lower than i x-s And J i When the product of (2) is the product of (1), continuously judging whether the actual current of the fan (10) is higher than i x-s And J i Is a product of (2);
step S560, when judging that the actual current of the fan (10) is higher than i x-s And J i When the product of (2) is multiplied by (1), controlling the fan (10) to wind speed n x-(s-1) Running, and after S is replaced by S-1, entering step S510; when the actual current of the fan (10) is not higher than i x-s And K is equal to i When the product of (c) is obtained, the process proceeds directly to step S510.
9. The control method of a gas water heater according to claim 7, further comprising the steps of:
step S570, judging whether the actual current of the fan (10) is lower than i x-p And when the actual current of the fan (10) is lower than i x-p At the time, the process goes to step S580, when the actual current of the fan (10) is not lower than i x-p The process proceeds to step S540, where i x-p For the fan (10) under the working thermal load Q x The corresponding protection current;
and step S580, stopping the gas water heater to carry out a protection state.
10. A control device of a gas water heater, characterized in that the control device of the gas water heater comprises:
the first acquisition module is used for acquiring the cold water inlet temperature;
The second acquisition module is used for acquiring the temperature of hot water outlet water;
the third acquisition module is used for acquiring the water production flow;
the control module is used for obtaining a working heat load according to cold water inlet temperature, hot water outlet temperature and water production flow, and determining that the fan (10) operates in a constant current working mode or a constant rotating speed working mode according to the comparison result of the working heat load and the critical heat load; wherein the critical heat load is set to a point value located in the full heat load section.
11. The gas water heater is characterized by comprising a fan (10), a water inlet temperature sensor (20), a water outlet temperature sensor (30), a water flow sensor (40), a gas proportional valve (50) and a controller (60), wherein the controller (60) is electrically connected with the fan (10), the water inlet temperature sensor (20), the water outlet temperature sensor (30), the water flow sensor (40) and the gas proportional valve (50) respectively; the controller (60) comprises a memory storing a computer program and a processor implementing the steps of the method of any of claims 1 to 9 when the computer program is executed.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001136782A (en) * | 1999-08-24 | 2001-05-18 | Toyoda Gosei Co Ltd | Rotation control device for air conditioner |
| JP2010242767A (en) * | 2010-07-20 | 2010-10-28 | Fuji Industrial Co Ltd | Wind rate control method for blower |
| JP2013142510A (en) * | 2012-01-11 | 2013-07-22 | Purpose Co Ltd | Water heater device and power supply method for the same |
| CN105757994A (en) * | 2016-01-18 | 2016-07-13 | 广东万家乐燃气具有限公司 | Gas water heater self-adaption wind pressure resisting control method and system |
| CN110159575A (en) * | 2018-02-10 | 2019-08-23 | 芜湖美的厨卫电器制造有限公司 | Blower control method, device, water heater and the storage medium of gas heater |
| CN113048657A (en) * | 2021-04-29 | 2021-06-29 | 芜湖美的厨卫电器制造有限公司 | Wind resistance control method for gas water heater and gas water heater |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002168447A (en) * | 2000-12-04 | 2002-06-14 | Matsushita Electric Ind Co Ltd | Controller for water heater |
| JP3884653B2 (en) * | 2002-01-11 | 2007-02-21 | 高木産業株式会社 | Water heater |
| CN105757998B (en) * | 2016-03-25 | 2019-02-22 | 芜湖美的厨卫电器制造有限公司 | Gas heater and its method of controlling exhaust gas |
| CN108757530A (en) * | 2018-04-23 | 2018-11-06 | 广东万家乐燃气具有限公司 | A kind of DC fan method for controlling number of revolution, system and gas heater |
| CN109869893B (en) * | 2019-01-29 | 2024-07-23 | 广东万和热能科技有限公司 | Fan control method and system of gas water heater |
| CN112923571A (en) * | 2021-02-23 | 2021-06-08 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
-
2021
- 2021-11-26 CN CN202111425610.2A patent/CN114151975B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001136782A (en) * | 1999-08-24 | 2001-05-18 | Toyoda Gosei Co Ltd | Rotation control device for air conditioner |
| JP2010242767A (en) * | 2010-07-20 | 2010-10-28 | Fuji Industrial Co Ltd | Wind rate control method for blower |
| JP2013142510A (en) * | 2012-01-11 | 2013-07-22 | Purpose Co Ltd | Water heater device and power supply method for the same |
| CN105757994A (en) * | 2016-01-18 | 2016-07-13 | 广东万家乐燃气具有限公司 | Gas water heater self-adaption wind pressure resisting control method and system |
| CN110159575A (en) * | 2018-02-10 | 2019-08-23 | 芜湖美的厨卫电器制造有限公司 | Blower control method, device, water heater and the storage medium of gas heater |
| CN113048657A (en) * | 2021-04-29 | 2021-06-29 | 芜湖美的厨卫电器制造有限公司 | Wind resistance control method for gas water heater and gas water heater |
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