CN117469798A - Zero-cooling water gas water heater and control method thereof - Google Patents

Abstract

The application relates to a zero-cooling water gas water heater and a control method thereof. Wherein the method comprises the following steps: the controller obtains the cruising rotating speed of the water pump in a first preset time in a cruising preheating mode, can determine a reference water pump rotating speed according to the cruising rotating speed, obtains the working rotating speed of the water pump in real time, and controls the cruising preheating mode to stop running if the working rotating speed and the reference water pump rotating speed meet preset conditions; the preset condition is that the working rotation speed is larger than the reference water pump rotation speed or the working rotation speed is larger than or equal to the reference water pump rotation speed. By adopting the method, the zero-cold water gas water heater can not be affected by communication such as installation environment, interference signals and the like when the zero-cold water gas water heater is used, the problem of zero-cold water control failure is effectively solved, and the reliability and stability of the zero-cold water gas water heater are improved.

Description

Zero-cooling water gas water heater and control method thereof

Technical Field

The application relates to the technical field of gas water heaters, in particular to a zero-cooling water gas water heater and a control method thereof.

Background

With the development of the gas water heater technology, a zero-cooling water gas water heater appears, and the zero-cooling water gas water heater adopts a built-in water pump to drive the water in the internal pipeline of the water heater, the external hot water pipe and the water return pipe to circularly flow so as to realize cruising and preheating of the waterway system.

In the prior art, in order to solve the problem that cold water pipeline is full of hot water, extravagant gas, gas heater system is equipped with auxiliary controller and temperature probe on the water return valve more, and auxiliary controller communicates with gas heater through modes such as connecting wiFi, when the detected temperature reached the preset temperature, corresponding signal transmission to gas heater to control the water pump and in time close, stop circulating preheating. However, if the communication quality between the gas water heater and the auxiliary controller is poor, the zero cold water control is easy to be invalid.

Disclosure of Invention

The invention aims to provide a control method of a zero-cooling water gas water heater, which can effectively solve the problem of zero-cooling water control failure.

The technical problems are solved by the following technical scheme:

a control method of a zero cold water gas water heater comprises the following steps:

starting a water pump based on a cruise preheating mode starting instruction, acquiring a cruise rotational speed of the water pump after a first preset time, and determining a reference water pump rotational speed according to the cruise rotational speed; after the rotation speed of the reference water pump is determined, the working rotation speed of the water pump is obtained in real time;

if the working rotation speed and the reference water pump rotation speed meet the preset conditions, the cruise preheating mode is controlled to stop running; the preset condition is that the working rotation speed is larger than the reference water pump rotation speed or the working rotation speed is larger than or equal to the reference water pump rotation speed.

According to the control method of the zero cold water gas water heater, after the water pump is started, the cruising preheating mode can be controlled to stop running according to the real-time working rotation speed of the water pump and the reference water pump rotation speed, the gas water heater does not need to communicate with the water return valve, and the gas water heater judges whether to stop the cruising preheating mode through the rotation speed of the water pump, so that the zero cold water gas water heater cannot be affected by communication such as installation environment and interference signals when in use, the installation and use conditions of the zero cold water gas water heater are reduced, and the reliability and stability of the zero cold water gas water heater are improved.

In one embodiment, the preset condition is that the working rotation speed is greater than the reference water pump rotation speed or the working rotation speed is greater than or equal to the reference water pump rotation speed in the second preset time.

In one embodiment, the cruising speed is an average speed of the water pump over a preset period of time after the first preset time.

The reliability of the water pump rotating speed data can be improved by obtaining reasonable average rotating speed, and the reliability of the zero-cooling water gas water heater is further improved.

In one embodiment, the preset time period is a fixed time period in which the fluctuation value of the rotational speed of the water pump is not greater than the preset deviation value.

The actual rotation speed of the water pump can be evaluated whether to be considered as reasonable cruising rotation speed or not through the rotation speed fluctuation value of the water pump, the reliability of rotation speed data of the water pump is improved, and the reliability of the zero cold water gas water heater is further improved.

In one embodiment, the step of determining the reference water pump speed from the cruise speed includes:

and acquiring a first preset coefficient, and determining the rotating speed of the reference water pump according to the cruising rotating speed and the first preset coefficient, wherein the first preset coefficient is larger than 1.

In one embodiment, the control method of the zero cold water gas water heater further comprises the following steps:

in the case of the first cruise warm-up, after the control of the cruise warm-up mode is stopped, further comprising: recording the first preheating time;

under the condition of non-primary cruise preheating, acquiring primary preheating time based on a starting instruction of a cruise preheating mode, and determining reference preheating time according to the primary preheating time;

after the reference preheating time is determined, the accumulated working time of the current cruise preheating mode is obtained in real time;

and controlling the cruise preheating mode to stop running according to the accumulated working time and the reference preheating time.

The reference preheating time is set to limit non-primary preheating, so that the water temperature is prevented from being too high, a user is scalded, energy sources such as fuel gas and power supply can be saved, and the safety and reliability and the green environmental protection performance of the zero-cooling water gas water heater are improved.

In one embodiment, the step of determining the reference preheat time from the first preheat time includes:

and acquiring a second preset coefficient, and determining a reference preheating time according to the first preheating time and the second preset coefficient, wherein the second preset coefficient is larger than 1.

The setting of the second preset coefficient can ensure that the time of first preheating is greater than or equal to the time of non-first preheating, ensure the preheating effect, avoid wasting energy sources such as fuel gas, electric power, and the like, simultaneously can also avoid scalding users due to overhigh water temperature after cold water preheating, and improve the green performance and the safe reliability of the zero-cold water gas water heater.

In one embodiment, the step of controlling the cruise warm-up mode to stop operation according to the accumulated operating time and the reference warm-up time includes:

the accumulated working time and the reference preheating time meet preset conditions, and the cruise preheating mode is controlled to stop running; the preset condition is that the accumulated working time is larger than the reference preheating time or the accumulated working time is larger than or equal to the reference preheating time.

The standard data of cold water preheating completion can be converted into data by setting preset conditions, reliable data are provided for cold water preheating, and the reliability degree and the data conversion degree of the zero cold water gas water heater are improved.

In one embodiment, the step of activating the water pump further comprises:

acquiring current water flow, and controlling the water heater to enter a cruising preheating mode if the current water flow is greater than or equal to the starting water flow;

after entering a cruise preheating mode, acquiring a set temperature and a dynamic temperature parameter, and determining a target heating temperature of the water heater according to the set temperature and the dynamic temperature parameter; wherein the dynamic temperature parameter is a temperature value determined based on the set temperature.

The working efficiency of the zero-cold water gas water heater can be improved and energy can be saved by acquiring the current water flow and dynamic temperature parameters of the zero-cold water gas water heater.

In one embodiment, the step of obtaining the current water flow rate further comprises:

acquiring the starting rotating speed and the real-time rotating speed of the water pump;

if the real-time rotating speed is not greater than the starting rotating speed in the third preset time, determining that the water pump fails; otherwise, the current water flow is obtained.

The technical problems can be solved by the following technical scheme:

a zero cold water gas water heater comprising: the device comprises an internal waterway, a heat exchanger arranged on the internal waterway, a combustor arranged corresponding to the heat exchanger, a water pump arranged at the water inlet position of the heat exchanger and a controller;

the controller is respectively and electrically connected with the burner and the water pump; the controller comprises a memory storing a computer program and a processor implementing the steps of the method described above when the processor executes the computer program.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person having ordinary skill in the art.

FIG. 1 is one of the block diagrams of a zero cold water gas water heater in one embodiment;

FIG. 2 is a flow chart of a control method of the zero cold water gas water heater according to one embodiment;

FIG. 3 is a second flow chart of a control method of the zero cold water gas water heater according to an embodiment;

FIG. 4 is a flow diagram of determining a reference preheat time based on a first preheat time in one embodiment;

FIG. 5 is a flow chart illustrating a control of a cruise warm-up mode to cease operation based on a cumulative operating time and a reference warm-up time in one embodiment;

FIG. 6 is a schematic flow chart of a zero cold water gas water heater after a water pump is started in one embodiment;

FIG. 7 is a second block diagram of a zero cold water gas water heater in one embodiment;

FIG. 8 is a diagram showing the preset mapping relationship between dynamic temperature parameters and set temperatures according to one embodiment;

FIG. 9 is a schematic flow chart of the zero cold water gas water heater before the current water flow is obtained in one embodiment;

fig. 10 is an internal structural diagram of a controller in one embodiment.

Reference numerals illustrate:

100. zero cold water gas water heater; 102. an internal waterway; 104. a heat exchanger; 106. a burner; 108. a water pump; 110. a water return valve; 1102. a temperature controller; 1104. a water solenoid valve; 112. a controller; 114. a water flow sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The control method of the zero cold water gas water heater can be applied to an application environment shown in fig. 1. Wherein the controller 112 controls the operation of the water pump 108. The controller 112, heat exchanger 104, burner 106, and water pump 108 may be integrated within the water heater 100. When the zero cold water gas water heater 100 enters the cruise preheating mode, the controller 112 can acquire the cruise rotational speed of the water pump 108 after a first preset time, and can determine the reference water pump rotational speed according to the acquired cruise rotational speed; at this time, the controller 112 may obtain the working rotation speed of the water pump in real time, and control the cruising warm-up mode to stop operating when the working rotation speed and the reference water pump rotation speed meet the preset conditions (the preset conditions are that the working rotation speed is greater than the reference water pump rotation speed or the working rotation speed is greater than or equal to the reference water pump rotation speed), so as to complete the warm-up work of the cold water in the internal waterway 102 and obtain the hot water. The control method of the zero-cold water gas water heater abandons the auxiliary controller 112 in the traditional zero-cold water gas water heater 100, and removes a communication module for controlling the use of the zero-cold water gas water heater 100, so that the zero-cold water gas water heater 100 is not affected by communication such as installation environment, interference signals and the like when in use, the installation and use conditions of the zero-cold water gas water heater 100 are reduced, and the reliability and stability of the zero-cold water gas water heater 100 are improved.

In an exemplary embodiment, as shown in fig. 2, there is provided a control method of a zero cold water gas water heater, the method comprising:

s202, starting a water pump based on a cruise preheating mode starting instruction, acquiring a cruise rotational speed of the water pump after a first preset time, and determining a reference water pump rotational speed according to the cruise rotational speed; and after the rotation speed of the reference water pump is determined, the working rotation speed of the water pump is obtained in real time.

In the cruise warm-up mode, the controller may acquire the cruise rotational speed of the water pump after a first preset time, at which time the rotational speed of the water pump is considered to be stationary, i.e., the cruise rotational speed is the rotational speed of the water pump in a stationary state. The determination of the first preset time can be determined by means of early-stage testing and the like, for example, by collecting the rotation speed of the water pump in real time, obtaining a change curve of the rotation speed of the water pump, determining the time length from starting the water pump to the rotation speed of the water pump reaching a stable state, and taking the time as the first preset time. In some models of water heater applications, the first preset time may be 30 seconds, 40 seconds, 50 seconds, 60 seconds, 70 seconds, 80 seconds, etc.

The cruising speed of the water pump can be obtained through a speed measuring device built in the water pump, the speed measuring device can be a photoelectric sensor, a Hall sensor, a torque speed sensor and other devices, the cruising speed can be measured through other modes such as an electromagnetic induction principle, the devices or the measuring modes are only exemplified, the cruising speed is not limited, and the cruising speed is not repeated here. In addition, the rotation speed measuring device of the water pump can be arranged in the water pump, and can be connected with the water pump or the controller in an external mode, so that the description is omitted.

The determination of the reference water pump rotation speed can be determined according to a table corresponding to the preset circulating rotation speed and the reference water pump rotation speed, and also can be determined through calculation of the circulating rotation speed and a preset coefficient, and the determination mode is not particularly limited, wherein the determined reference water pump rotation speed is not less than the cruising rotation speed.

S204, if the working rotation speed and the reference water pump rotation speed meet preset conditions, controlling the cruise preheating mode to stop running; the preset condition is that the working rotation speed is larger than the reference water pump rotation speed or the working rotation speed is larger than or equal to the reference water pump rotation speed.

According to the working rotation speed and the reference water pump rotation speed, whether the preheating is finished or not can be judged, so that the cruise preheating mode is ended. The judgment standard for cold water preheating completion is dataized, so that reliable data support can be provided for cold water preheating, and the reliability and dataized degree of the zero cold water gas water heater are improved.

Specifically, after the water valve is closed, the internal water passage is blocked by the water valve, and at this time, the water resistance at the rear end of the water pump (with the water flow direction of the internal water passage as the reference direction) increases, and the rotation speed of the water pump increases when the same current is input. Therefore, the controller can judge the open and close states of the water valve by monitoring the change of the rotation speed of the water pump. When the controller monitors that the rotating speed of the water pump is increased to meet the preset condition, the water valve can be judged to be closed, so that the cruise preheating mode is controlled to stop running.

And by monitoring the working rotation speed, when the working rotation speed of the water pump and the reference water pump rotation speed meet the preset condition, the cold water preheating is considered to be finished at the present time, and the controller controls the cruising preheating mode to stop running.

The second preset time can be configured according to the reliability requirement, false detection caused by instantaneous data fluctuation can be avoided through setting the second preset time, and further abnormal stop of cruise preheating caused by false detection is avoided, so that the reliability of cruise preheating control is improved. For example, the second preset time is 10S, and if the working rotation speed is always greater than or equal to the reference water pump rotation speed within 10S, the water valve is judged to be closed, so that the cruise preheating mode is controlled to stop running.

As shown in fig. 1, the water solenoid valve is arranged in a water return valve of the zero-cooling water gas water heater, and the water return valve comprises a temperature controller and a water solenoid valve. The temperature controller is connected with the water electromagnetic valve, wherein the water electromagnetic valve and the temperature controller can be connected in various modes, in one mode, the water electromagnetic valve can be electrically connected with the temperature controller in a serial mode, the temperature controller collects water temperature flowing through the temperature controller, when the temperature controller detects that the obtained backwater temperature is smaller than the target temperature, the temperature controller is conducted, a water electromagnetic valve circuit is conducted, and the water electromagnetic valve is opened; when the temperature of the backwater detected by the temperature controller is greater than or equal to the target temperature, the temperature controller is disconnected, the water solenoid valve circuit is disconnected, and the water solenoid valve is closed. The temperature of the backwater is the temperature of the water flow of the internal waterway when the water flow passes through the temperature control valve; the target temperature is the final temperature of hot water obtained by heating cold water by the zero-cold water gas water heater. In one connection mode, the water electromagnetic valve can be controlled by an MCU (micro control unit, microcontroller Unit) in the temperature controller, a temperature sensor in the temperature controller collects water temperature flowing through the temperature controller and sends the water temperature to the MCU, and the MCU controls the water electromagnetic valve to be opened when the backwater temperature is smaller than the target temperature; and when the return water temperature is greater than or equal to the target temperature, the MCU controls the water solenoid valve to be closed. Of course, the above examples are merely illustrative, and the control and connection relation between the water valve and the thermostat is not limited.

The specific device form of temperature controller can have multiple, in one of them specific device form, the temperature controller can be adjustable temperature controller, and the user can be according to the temperature point (set temperature promptly) of individual desired water temperature to the action of adjustable temperature controller, realizes accurate disconnection temperature controller, and then controls the water valve and closes, avoids the temperature in the inside water route too high, scalds the user, improves the precision of zero cold water gas heater 10. In addition, the temperature controller can also be a bimetallic strip temperature controller, a liquid expansion temperature controller, a pressure temperature controller and the like, and the examples are only illustrative and not limiting the temperature controller.

The cut-off function of the water electromagnetic valve can control the on-off of the internal waterway, and when the water electromagnetic valve is in an open state, the water flow in the internal waterway can realize circulation under the action of the water pump; when the water valve is in a closed state, the water flow in the internal waterway is cut off, and circulation cannot be realized. The water electromagnetic valve can be arranged at the tail end of the internal waterway hot water pipeline, namely the water point position, and can accurately separate the cold water pipe from the hot water pipe. The arrangement mode can ensure that the preheated hot water in the hot water pipe of the internal waterway does not flow to the cold water pipe in the internal waterway after the water valve is closed, so that the mixing of cold water and hot water is avoided, the cold water and the hot water are effectively distinguished, the safe use of the cold water pipe of the internal waterway is ensured, and the reliability and the practicability of the zero cold water gas water heater are improved.

The temperature controller and the water solenoid valve can adopt the mounting mode of closely installation, in one of them mounting mode, the water solenoid valve can be installed in the rear end of temperature controller (with the rivers direction of inside water route as the reference direction), after the temperature controller disconnection, the water solenoid valve is closed, the temperature of water solenoid valve department at the temperature controller rear end is lower this moment, can effectively reduce the incrustation scale like this and produce in water solenoid valve department, pile up even, and then avoid blockking up inside water route and delivery port position, can ensure the rivers circulation of inside water route and delivery port play water's circulation degree.

In one exemplary embodiment, the cruising speed is an average speed of the water pump over a preset period of time after the first preset time.

The preset time period after the first preset time also belongs to a constant speed time period after the rotation speed of the water pump is stable, and correspondingly, the obtained cruising rotation speed can be the stable rotation speed in the time period. Of course, the specific average rotational speed of the cruising rotational speed may also be obtained by other calculation methods, which will not be described herein. The reliability of the water pump rotating speed data can be improved by obtaining reasonable average rotating speed, and the reliability of the zero-cooling water gas water heater is further improved.

In one exemplary embodiment, the preset time period is a fixed time period in which the fluctuation value of the rotation speed of the water pump is not greater than the preset deviation value.

When the preset time period is an acceleration time period after the water pump is started, the rotation speed of the water pump is gradually increased, and the fluctuation value of the rotation speed of the water pump is not more than the preset deviation value; when the preset time period is a uniform speed time period after the rotation speed of the water pump is stable, the rotation speed of the water pump tends to be stable, and at the moment, the fluctuation value of the rotation speed of the water pump is small and tends to be 0. Specifically, if the preset time period is set to be 10 seconds, after the water pump is started for 30 seconds, the preset time period is entered, the rotation speed of the water pump is detected within 10 seconds, whether the fluctuation value of the rotation speed of the water pump exceeds the preset deviation value is calculated, if the fluctuation value of the rotation speed of the water pump is larger than the preset deviation value, the rotation speed of the water pump can be detected again after waiting for 5 seconds until the rotation speed of the water pump with the fluctuation value of the rotation speed of the water pump smaller than or equal to the preset deviation value is obtained, and the obtained cruising rotation speed is credible data. The preset deviation value is the maximum error value of the actual rotation speed of the water pump and the ideal rotation speed of the water pump, and can be set to be 5%,10% and the like, and the fluctuation value of the rotation speed of the water pump is the actual error value of the actual rotation speed of the water pump and the ideal rotation speed of the water pump. The preset deviation value can be a theoretical difference value between a theoretical maximum rotating speed and a theoretical minimum rotating speed when the water pump is in a stable state, and the fluctuation value of the rotating speed of the water pump is an actual deviation value between the actual maximum rotating speed of the water pump and the failure minimum rotating speed of the water pump. The actual rotation speed of the water pump can be evaluated whether to be considered as reasonable cruising rotation speed or not through the rotation speed fluctuation value of the water pump, the reliability of rotation speed data of the water pump is improved, and the reliability of the zero cold water gas water heater is further improved.

Of course, the above-mentioned preset time period is set to 10 seconds only by way of example, the preset time period may be set to 30 seconds, 40 seconds, 50 seconds, 60 seconds, 70 seconds, 80 seconds, etc., and specific values of the preset time period may be set according to different models, different application environments, different usage requirements, etc., which is not limited herein.

In one exemplary embodiment, determining the reference water pump speed from the cruise speed includes:

and acquiring a first preset coefficient, and determining the rotating speed of the reference water pump according to the cruising rotating speed and the first preset coefficient, wherein the first preset coefficient is larger than 1.

The setting range of the first preset coefficient is greater than 1, and may specifically be 1.1, 1.5, 2, etc. When the real-time water pump cruising speed is greater than or equal to the product of the cruising speed and the first preset coefficient, the water valve is considered to be closed, and at the moment, the controller controls the burner and the water pump to stop working, and the cruising preheating mode is ended. Of course, the setting of the first preset coefficient may have various choices, and may specifically be set according to different types of water pumps, different application environments, etc. to obtain an optimal first preset coefficient, which is not limited herein.

In an exemplary embodiment, as shown in fig. 3, the method further includes:

s302, after the cruise preheating mode is controlled to stop running under the condition of first cruise preheating, the method further comprises the following steps: the first preheat time was recorded.

The first warm-up time may be obtained by a timer. Specifically, the timer may be connected to the controller, and the controller controls the timer to record the preheating time when the timer is first preheated, and the specifically recorded time may be counted from the time of the burner, and the time counting is ended when the burner is stopped, and the recorded time result is stored, where the time result is the first preheating time. It should be noted that the above-mentioned acquisition of the first preheating time is only illustrative and not limiting.

S304, under the condition of non-first-time cruising preheating, acquiring first-time preheating time based on a cruising preheating mode starting instruction, and determining reference preheating time according to the first-time preheating time.

The reference preheating time can be determined according to the first preheating time, in an ideal case, the cold water temperature during the first preheating is lower than the cold water temperature during the non-first preheating, if the non-first preheating time is overlong, the temperature controller may have the problem of faults and the like, at this time, in order to avoid the overlong preheating, the non-first preheating can be limited by setting the reference preheating time, the water temperature is prevented from being overhigh, the user is scalded, the energy sources such as gas, power supply and the like can be saved, and the safety reliability and the green environmental protection of the zero cold water gas water heater are improved. The specific setting of the reference warm-up time may be a function of the first warm-up time, e.g., the reference warm-up time is three-fifths of the time period of the first warm-up time. It should be noted that the calculation of the reference preheating time is merely illustrative, and may be specifically set according to different types of water pumps, different application environments, and the like, and is not limited herein.

S306, after the reference warm-up time is determined, the accumulated working time of the current cruise warm-up mode is obtained in real time.

The specific time for acquiring the accumulated working time can be counted from the starting time of the burner and recorded in real time.

And S308, controlling the cruise preheating mode to stop running according to the accumulated working time and the reference preheating time.

In one exemplary embodiment, as shown in FIG. 4, determining the reference preheat time from the first preheat time includes:

s402, acquiring a second preset coefficient, and determining a reference preheating time according to the first preheating time and the second preset coefficient, wherein the second preset coefficient is larger than 1.

The setting range of the second preset coefficient may be greater than 1, specifically may be 1.1, 1.5, 2, etc., where the time for the first preheating is greater than or equal to the time for the non-first preheating. The setting of the second preset coefficient can ensure that the time of first preheating is greater than or equal to the time of non-first preheating, ensure the preheating effect, avoid wasting energy sources such as fuel gas, electric power, and the like, simultaneously can also avoid scalding users due to overhigh water temperature after cold water preheating, and improve the green performance and the safe reliability of the zero-cold water gas water heater. Of course, the specific setting of the second preset coefficient may be set according to different models, different application environments, different use requirements, and the like, and is not limited herein.

In one exemplary embodiment, as shown in FIG. 5, controlling the cruise warm-up mode to stop operation based on the accumulated operating time and the reference warm-up time includes:

s502, controlling the cruise preheating mode to stop running when the accumulated working time and the reference preheating time meet preset conditions; the preset condition is that the accumulated working time is larger than the reference preheating time or the accumulated working time is larger than or equal to the reference preheating time.

Under the condition of non-primary preheating, the specific time for acquiring the accumulated working time can be counted from the time of starting the burner 106, recorded in real time, the recorded result is compared with the reference preheating time, and when the accumulated working time is greater than or equal to the reference preheating time, the cruise preheating mode is ended. The standard data of cold water preheating completion can be converted into data by setting preset conditions, reliable data are provided for cold water preheating, and the reliability degree and the data conversion degree of the zero cold water gas water heater are improved.

In an exemplary embodiment, as shown in fig. 6, after the circulating water pump is started, the method further includes:

s602, acquiring the current water flow, and controlling the water heater to enter a cruising and preheating mode if the current water flow is greater than or equal to the starting water flow.

As shown in fig. 7, the water flow sensor 114 is connected with the controller 12, and when the actual water flow collected by the water flow sensor 114 is greater than the cruise preheating starting water flow, it indicates that the water flow required by the cruise preheating is sufficient, and the burner 106 can be started to enter the cruise preheating mode; otherwise, the zero cold water gas water heater 100 continues to be maintained in a standby state, and continues to wait for cold water to be poured in to obtain sufficient water flow. The arrangement mode can ensure that the zero-cooling water gas water heater starts preheating after obtaining enough water flow. If the water flow is insufficient, the water enters a cruising preheating mode, preheated hot water flows out of the stop valve, and when the preheated hot water flows into the cold water pipe, cold water which is not preheated is mixed, so that the hot water is rapidly cooled, invalid preheating is caused, and energy sources such as fuel gas, electric power and the like are wasted. Therefore, the working efficiency of the zero-cooling water gas water heater can be improved and the energy can be saved by acquiring the current water flow of the zero-cooling water gas water heater.

S604, after entering a cruise preheating mode, acquiring a set temperature and a dynamic temperature parameter, and determining a target heating temperature of the water heater according to the set temperature and the dynamic temperature parameter; wherein the dynamic temperature parameter is a temperature value determined based on the set temperature.

The set temperature is the hot water temperature that the user would expect to obtain when using a zero cold water gas water heater. Optionally, after obtaining the set temperature, the controller may select a suitable dynamic temperature parameter according to the set temperature to obtain the target heating temperature. The target heating temperature is temperature data corrected by dynamic temperature parameters, and the temperature data can be flexibly adapted to actual use scenes with different setting temperatures, for example, according to the proper dynamic temperature parameters, the target heating temperature is higher than the setting temperature, so that the power of a combustor and a heat exchanger is increased, the preheating of cold water is completed in a shorter time, and energy sources such as fuel gas, electric power and the like are saved.

The dynamic temperature parameter may be determined in various manners, as shown in fig. 8, and a table look-up table is obtained for one of the preset mapping relationship tables, when the set temperature is 35-65 ℃, the corresponding dynamic temperature parameter is obtained, and of course, the specific set temperature may be set according to the actual application scenario of the zero-cold water gas water heater, and the temperature data shown in fig. 8 is not limited. The preset mapping relation table shown in fig. 8 can be obtained: when the set temperature is 35-37 ℃, the dynamic temperature parameter can be 2 ℃; when the set temperature is 38-40 ℃, the dynamic temperature parameter can be 3 ℃; when the set temperature is 41-43 ℃, the dynamic temperature parameter can be 4 ℃; when the set temperature is 44-45 ℃, the dynamic temperature parameter may be 4 ℃, and other specific data may be obtained through the above content and fig. 8, which are not described herein. However, when the set temperature is 50 ℃ or more, the dynamic temperature parameter may be 0 ℃ so as to avoid obtaining an excessively high target temperature, resulting in scalding the user when using hot water. Of course, the dynamic temperature parameters can be set according to different types of combustors and heat exchangers, cruising waterways with different lengths, different application environments and the like, and the specific dynamic temperature parameters can be obtained through multiple experiments. The specific data values and the obtaining modes of the dynamic temperature parameters and the preset mapping relation table are only illustrative and not limiting.

In an exemplary embodiment, as shown in fig. 9, before the current water flow is obtained, the method further includes:

s902, acquiring the starting rotating speed and the real-time rotating speed of the water pump.

S904, if the real-time rotating speed is not greater than the starting rotating speed in the third preset time, determining that the water pump is in fault; otherwise, the current water flow is obtained.

Under the condition of non-primary preheating, the water pump is started, and the water pump rotating speed is continuously monitored within the third preset time, so that the water pump fault factor can be eliminated, the entering time of the cruise preheating mode is controlled under the condition of normal operation of the water pump, the reliable realization of the cruise preheating function is ensured, and further damage to the water pump and the like can be avoided. The third preset time can be a time period capable of determining the water pump failure according to the test.

In one embodiment, the third preset time includes a plurality of sub-time periods set at intervals, and step S804 may include:

if the real-time rotating speed in each sub-time period is not greater than the starting rotating speed, determining that the water pump is in fault, otherwise, acquiring the current water flow.

By carrying out real-time rotation speed monitoring in a plurality of sub-time periods at intervals and comparing the real-time rotation speed with the starting rotation speed, namely by judging the possibility of water pump faults in a plurality of time periods, on the basis of the possibility, under the condition that the starting time of the water pump is prolonged due to the aging of the water pump and other reasons, false detection of an acceleration stage during normal starting of the water pump can be eliminated, and the reliability of the detection result of the water pump faults is improved.

Taking the third preset time as 40 seconds, the sub-time period as 10 seconds, and the interval between two adjacent sub-time periods as 5 seconds as an example, if the real-time rotation speed of the water pump at each moment in 10 seconds when the water pump 108 is started is greater than the starting rotation speed of the water pump, acquiring the current water flow, and entering a standby mode; if the real-time rotating speed is smaller than or equal to the starting rotating speed of the water pump at the moment, waiting for 5 seconds, and comparing the real-time rotating speed with the starting rotating speed of the water pump in the next sub-time period; based on the comparison result of the real-time rotating speed and the starting rotating speed, the system enters a standby mode or waits for real-time rotating speed monitoring and comparison of the next sub-time period, if the real-time rotating speed of the water pump in the three sub-time periods is smaller than or equal to the starting rotating speed, the water pump faults, such as water pump damage, water pump impeller blocking and the like, are judged, and at the moment, an alarm can be sent through audible and visual devices, such as a buzzer, an indicator lamp and the like. Of course, various alarm modes can be provided, such as bluetooth connection with mobile phone software, etc., and the above is only for illustration and not limitation.

It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order 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 some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a zero cold water gas water heater device for realizing the control method of the zero cold water gas water heater. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the zero cold water gas water heater device or devices provided below may be referred to the limitation of the control method of the zero cold water gas water heater hereinabove, and will not be repeated herein.

In one exemplary embodiment, a zero cold water gas water heater 100 is provided, as shown in fig. 1 and 7, comprising: the device comprises an internal waterway 102, a heat exchanger 104 arranged on the internal waterway 102, a combustor 106 arranged corresponding to the heat exchanger 104, a water pump 108 arranged at the water inlet position of the heat exchanger 104 and a controller 112;

the controller 112 is electrically connected to the burner 106 and the water pump 108, respectively; the controller comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of any one of the control methods of the zero cold water gas water heater when executing the computer program.

In one exemplary embodiment, a controller is provided, the internal structure of which may be as shown in fig. 10. The controller includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the controller is configured to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the controller is used for storing data such as the rotating speed of the water pump, the water temperature and the like. The input/output interface of the controller is used to exchange information between the processor and the external device. The communication interface of the controller is used for communicating with an external terminal through network connection. The computer program when executed by the processor is used for realizing a control method of the zero cold water gas water heater.

It will be appreciated by those skilled in the art that the structure shown in fig. 10 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the controller to which the present application is applied, and that a particular controller may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, implements the steps of any one of the above-described methods of controlling a zero cold water gas water heater.

In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of any one of the above-described zero cold water gas water heater control methods _。

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 stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various 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, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. 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. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.

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 above examples only represent 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 present application. 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 shall be subject to the appended claims.

Claims (10)

1. A control method of a zero cold water gas water heater, the method comprising:

starting a circulating water pump based on a cruise preheating mode starting instruction, acquiring a cruise rotating speed of the circulating water pump after a first preset time, and determining a reference water pump rotating speed according to the cruise rotating speed; after the rotation speed of the reference water pump is determined, the working rotation speed of the circulating water pump is obtained in real time;

if the working rotation speed and the reference water pump rotation speed meet preset conditions, controlling the cruising preheating mode to stop running; the preset condition is that the working rotation speed is larger than the reference water pump rotation speed or the working rotation speed is larger than or equal to the reference water pump rotation speed.

2. The method of claim 1, wherein the predetermined condition is that the operating speed is greater than the reference water pump speed or the operating speed is greater than or equal to the reference water pump speed for a second predetermined time.

3. The method of claim 1, wherein the cruising speed is an average speed of the circulating water pump over a predetermined period of time after a first predetermined time.

4. A method according to claim 3, wherein the predetermined period of time is a fixed period of time in which the fluctuation value of the rotational speed of the water pump is equal to or less than a predetermined deviation value.

5. The method of claim 1, wherein said determining a reference water pump speed from said cruise speed comprises:

and acquiring a first preset coefficient, and determining the rotating speed of the reference water pump according to the cruising rotating speed and the first preset coefficient, wherein the first preset coefficient is larger than 1.

6. The method according to claim 1, wherein the method further comprises:

in the case of the first cruise warm-up, after the control of the cruise warm-up mode is stopped, the method further includes: recording the first preheating time;

under the condition of non-primary cruise preheating, acquiring primary preheating time based on a starting instruction of a cruise preheating mode, and determining reference preheating time according to the primary preheating time;

after the reference preheating time is determined, the accumulated working time of the current cruise preheating mode is obtained in real time;

and controlling the cruise preheating mode to stop running according to the accumulated working time and the reference preheating time.

7. The method of claim 6, wherein determining the reference warm-up time based on the first warm-up time comprises:

obtaining a second preset coefficient, and determining the reference preheating time according to the first preheating time and the second preset coefficient, wherein the second preset coefficient is larger than 1.

8. The method of claim 6, wherein controlling the cruise warm-up mode to stop operation based on the accumulated operating time and a reference warm-up time comprises:

the accumulated working time and the reference preheating time meet preset conditions, and the cruise preheating mode is controlled to stop running; the preset condition is that the accumulated working time is larger than the reference preheating time or the accumulated working time is larger than or equal to the reference preheating time.

9. The method according to any one of claims 1 to 8, further comprising, after the circulating water pump is started:

acquiring current water flow, and controlling the water heater to enter a cruising preheating mode if the current water flow is greater than or equal to starting water flow;

after the cruise preheating mode is entered, acquiring a set temperature and a dynamic temperature parameter, and determining a target heating temperature of the water heater according to the set temperature and the dynamic temperature parameter; wherein the dynamic temperature parameter is a temperature value determined based on the set temperature.

10. The method of claim 9, wherein prior to obtaining the current water flow, further comprising:

acquiring the starting rotating speed and the real-time rotating speed of the water pump;

if the real-time rotating speed is not greater than the starting rotating speed in the third preset time, determining that the water pump fails; otherwise, the current water flow is obtained.