CN112524635A

CN112524635A - Control method and device of gas water heater, gas water heater and storage medium

Info

Publication number: CN112524635A
Application number: CN202011380041.XA
Authority: CN
Inventors: 陈阳坚; 吴世华; 李光华; 王建军; 陈跃华
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-03-19

Abstract

The invention provides a control method and a control device of a gas water heater, the gas water heater and a storage medium, wherein the control method of the gas water heater comprises the following steps: acquiring the output heat of the gas water heater, and acquiring the gas outlet pressure value of a gas outlet of the gas proportional valve through a pressure detection device; confirming that the gas of the gas water heater is in a first abnormal state based on that the gas outlet pressure value is within the target pressure interval and the output heat is smaller than any value in the target output heat interval; and confirming that the gas of the gas water heater is in a second abnormal state based on the condition that the gas outlet pressure value is within the target pressure interval and the output heat is greater than any value in the target output heat interval. The maintenance difficulty of the personnel after sale is reduced by diagnosing whether the gas components are abnormal or not.

Description

Control method and device of gas water heater, gas water heater and storage medium

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a control method and device of a gas water heater, the gas water heater and a storage medium.

Background

In the related technical scheme, energy can be released when gas is combusted, and the gas water heater can collect and utilize the energy of the part.

The technical personnel in the field find that when the combustion condition of the whole gas water heater is reduced, whether the gas composition is abnormal or the gas water heater is abnormal cannot be judged, so that the maintenance of the gas water heater by after-sales personnel is difficult and long in maintenance time.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the present invention provides a control method for a gas water heater.

In a second aspect of the present invention, a control device for a gas water heater is provided.

In a third aspect of the present invention, a gas water heater is provided.

A fourth aspect of the present invention is to provide a readable storage medium.

In view of the above, according to a first aspect of the present invention, there is provided a control method for a gas water heater, wherein the gas water heater includes a gas proportional valve and a pressure detection device, the pressure detection device is disposed at a gas outlet of the gas proportional valve of the gas water heater, and the control method for the gas water heater includes: acquiring the output heat of the gas water heater, and acquiring the gas outlet pressure value of a gas outlet of the gas proportional valve through a pressure detection device; and determining the abnormal state of the gas water heater according to the comparison result of the gas outlet pressure value and the target pressure interval and the comparison result of the output heat and the target output heat interval.

The invention provides a control method of a gas water heater, which can judge whether the detected abnormality is caused by abnormal gas components when the gas water heater fails by operating the control method, and can carry out the maintenance work of the abnormal gas water heater by referring to the control method so as to reduce the maintenance difficulty of after-sales personnel.

The fault of the gas water heater can be a fault of a gas proportional valve, or can be a fault of a gas component, or can be caused by faults of other components, under a normal condition, when the gas proportional valve is abnormal, an outlet gas pressure value detected by a pressure detection device arranged at a gas outlet of the gas proportional valve is abnormal, if the outlet gas pressure value exceeds a target pressure interval, and whether the calorific value of the gas is too large or too small is mainly considered due to the abnormal gas component. The fault of gas component abnormity is separately divided, so that when the gas water heater is in an abnormal condition, the abnormal condition can be determined in time, and the maintenance difficulty of after-sales personnel is reduced.

Based on the characteristics of gas trouble and the characteristics of gas proportional valve trouble, whether the output heat of giving vent to anger pressure value and gas heater is judged to be unusual in the technical scheme of this application, specifically, compare gas heater's output heat and target output heat interval, and then whether the gas of affirming gas heater appears unusually.

The abnormal inspection process of the gas water heater mainly comprises two steps, wherein the first step comprises the following steps: and a second step of determining whether the abnormality is caused by the abnormality of the gas component, wherein the gas component corresponds to the heat value thereof as can be seen from the above description, so that the abnormality of the gas component can be determined by measuring the output heat of the gas water heater when the gas proportional valve is normal.

In one embodiment, the first step and the second step may be performed simultaneously to reduce the time consumed for anomaly detection.

In the technical scheme, the maintenance difficulty of after-sales personnel is reduced by diagnosing whether the gas components are abnormal or not, and in addition, the control method can be stored in the gas water heater in a program mode so that the gas water heater can automatically execute the program, the self-checking is realized, and the intellectualization of the gas water heater is improved.

The control method of the gas water heater according to the present invention may further include the following technical features:

in the above technical solution, the step of determining the abnormal state of the gas water heater according to the comparison result between the gas outlet pressure value and the target pressure interval and the comparison result between the output heat and the target output heat interval specifically includes: confirming that the gas of the gas water heater is normal based on the fact that the gas outlet pressure value is within the target pressure interval and the output heat is within the target output heat interval; confirming that the gas of the gas water heater is in a first abnormal state based on that the gas outlet pressure value is within the target pressure interval and the output heat is smaller than any value in the target output heat interval; and confirming that the gas of the gas water heater is in a second abnormal state based on the condition that the gas outlet pressure value is within the target pressure interval and the output heat is greater than any value in the target output heat interval.

In the technical scheme, in order to ensure the accuracy and the reliability of the gas abnormity judgment, the abnormity condition of the gas component is divided into the first abnormal state and the second abnormal state, so that the gas water heater can execute a corresponding control strategy according to the determined abnormal state. In order to reduce the probability that the gas produces a large amount of waste gas because of insufficient combustion, the gas heater is ensured to output stable heat, the probability that the output heat exceeds the preset heat standard range is reduced, meanwhile, the time required by output heat regulation is also reduced, the probability that the time required by adjusting the output heat exceeds the preset standard time range is reduced, and the use experience of a user is ensured.

Specifically, the determination condition of the first abnormal state may be replaced by that the gas outlet pressure value is in the target pressure interval and the output heat is lower than the minimum value of the target output heat interval, correspondingly, the determination condition of the second abnormal state may be replaced by that the gas outlet pressure value is in the target pressure interval and the output heat is higher than the maximum value of the target output heat interval, by comparing the output heat with the maximum value of the target output heat interval and the minimum value of the target output heat interval, the need of comparing the output heat with any value in the target output heat interval is avoided, and since the data amount to be compared is reduced, the data amount processed by the gas water heater can be reduced, which is beneficial to reducing the hardware requirement of the gas water heater and is convenient for controlling the cost of the gas water heater.

In any of the above technical solutions, the control method of the gas water heater further includes: increasing the opening degree of a gas proportional valve based on the fact that gas of the gas water heater is in a first abnormal state until the output heat is located within a target output heat interval; and reducing the opening degree of the gas proportional valve based on the fact that the gas of the gas water heater is in a second abnormal state until the output heat is within the target output heat interval.

In general, when the components of gas are abnormal, the gas water heater directly shows insufficient combustion or outputs small heat, so that the heat demand of the gas water heater cannot be met.

In order to solve the problems, the device capable of influencing whether the combustion is sufficient or not or the size of the output heat in the gas water heater can be a gas proportional valve, so that the gas water heater can adapt to the gas with abnormal components by adjusting the opening degree of the gas proportional valve, the gas water heater can still be used under the condition that the injected gas components are abnormal, and the gas water heater can adapt to different use scenes by operating the technical scheme of the application, so that the compatibility of the product to the gas with different components is improved.

Specifically, when the abnormal state of the gas is detected as a first abnormal state, the heat value of the gas is determined to be too low, and at the moment, the injection amount of the gas is increased by increasing the opening degree of the gas proportional valve, so that the combustion gas amount is increased at the same time; and when the abnormal state of the gas is detected to be a second abnormal state, the heat value of the gas is determined to be overhigh, and in order to obtain proper heat output, the opening degree of the gas proportional valve is reduced so as to reduce the injection amount of the gas. In the process, the output heat of the gas water heater is ensured to be within a target output heat interval by adjusting the opening degree of the gas proportional valve, so that the gas water heater can stably output the heat required by a user.

In any of the above technical solutions, the control method of the gas water heater further includes: sending alarm information based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is smaller than the first output heat value; or based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is larger than a second output heat value, alarm information is sent out, wherein the first output heat value is smaller than any value in the target output heat interval, and the second output heat value is larger than any value in the target output heat interval.

In the technical scheme, although the gas water heater can be compatible with gas with different components, part of the gas cannot be used due to different product designs, and the different gas can be distinguished according to the output heat of the gas water heater, so that a first output heat value and a second output heat value are correspondingly set for the gas, so that the output heat of the gas water heater is compared with the first output heat value and the second output heat value, and the gas which cannot be used by the gas water heater is distinguished.

After the part of gas is distinguished, alarm information can be output, so that a user can process abnormal gas in time. Wherein, the treatment mode can be gas replacement. In the process, a user is reminded to process the alarm information through outputting the alarm information, so that the risk of damage to the gas water heater due to the use of the gas with abnormal components is reduced, meanwhile, the phenomenon that the abnormal gas is insufficiently combusted to cause excessive waste gas discharged by the gas water heater is reduced, and simultaneously, the gas water heater vibrates along with the insufficient combustion to generate squeaking, so that the gas consumption of the gas water heater is increased and the use cost of the product is increased; meanwhile, the use experience of a user can be seriously influenced by large vibration and corresponding noise, and the user feels that the gas water heater runs dangerously.

In one embodiment, the first output heat value and the second output heat value form a safe output heat interval of the gas water heater, wherein the safe output heat interval is related to the composition of the gas.

In any of the above technical solutions, the control method of the gas water heater further includes: and sending alarm information and a shutdown signal based on the gas water heater.

In the technical scheme, when the alarm information is sent out, a shutdown signal is generated so that the gas water heater can execute shutdown operation. In the process, the shutdown operation of the gas water heater is controlled, so that the probability of damage to the gas water heater due to abnormal gas components is reduced, and the self-protection of the product is realized.

In any of the above technical solutions, the form of the alarm information includes, but is not limited to, sound alarm information, and may also be light alarm information, or composite alarm information in which sound alarm information and light alarm information are used in combination.

In one technical scheme, the alarm information can also be sent to a server for data interaction with the gas water heater, so that the server can be used for forwarding the alarm information to a terminal of a user to remind the user of timely processing. In the process, a warning mode of the warning information is provided, the probability that the warning information is sensed by a user is improved, and then the probability that the gas water heater is damaged due to the fact that abnormal gas is used for a long time is reduced.

In any one of the above technical solutions, the gas water heater further includes: the control method of the fan and the gas water heater further comprises the following steps: and adjusting the rotating speed of the fan according to the opening degree of the fuel gas proportional valve.

In the technical scheme, the gas water heater is also provided with the fan, wherein the fan can provide air for the gas water heater in the operation process, insufficient combustion can occur due to insufficient injected air when gas is combusted, when the gas is combusted insufficiently, the gas water heater can generate a large amount of waste gas, and simultaneously, along with the insufficient combustion, the gas water heater can generate vibration to generate squeaking, and the occurrence of the above conditions can increase the gas consumption of the gas water heater and increase the use cost of products; meanwhile, the use experience of a user can be seriously influenced by large vibration and corresponding noise, and the user feels that the gas water heater runs dangerously.

In order to reduce the occurrence of the above situation, the rotating speed of the fan can be determined according to the opening degree of the gas proportional valve, and then the fan is controlled to operate according to the rotating speed. Because the gas burning is abundant, can reduce the volume that the gas was wasted, reduced gas heater's amplitude of vibration and gas heater's noise simultaneously to user's use experience has been improved.

Specifically, a mapping relation between the rotating speed of the fan and the opening of the gas proportional valve may be pre-constructed, or a mapping relation between the rotating speed of the fan and the gas outlet pressure value may be pre-constructed, and the rotating speed of the fan is determined based on the corresponding relation between the gas outlet pressure value and the opening of the gas proportional valve.

In any of the above technical solutions, the control method of the gas water heater further includes: receiving a set target water outlet temperature, a water inlet temperature of the gas water heater, a water outlet temperature of the gas water heater and a water inlet flow of the gas water heater; determining target output heat according to the target water outlet temperature, the water inlet temperature and the water inlet flow; determining a target output heat interval according to the target output heat; and determining the output heat according to the water inlet temperature, the water outlet temperature and the water inlet flow.

In the technical scheme, the target output heat interval is not invariable, but is determined according to the working condition parameters of the gas water heater. The working condition parameters of the gas water heater include configuration information and environment parameters (such as water inlet temperature, water outlet temperature and water inlet flow of the gas water heater) in the actual use scene of the gas water heater. In general, after the specification of the gas water heater is determined, the configuration information of the gas water heater is also fixed and does not change. Similarly, under the condition that the water inlet temperature and the water inlet flow of the gas water heater are determined, the target output heat interval of the gas water heater and the water outlet temperature of the gas water heater are in a positive correlation, so that the corresponding target output heat interval can be determined according to the water outlet temperature.

In any of the above technical solutions, the process of determining the target output heat interval specifically includes: determining target output heat according to the target water outlet temperature, the target water inlet temperature and the target water inlet flow; and determining a target output heat interval according to the target output heat.

Because the control process belongs to a dynamic process, the output heat of the gas water heater cannot fluctuate greatly, the running stability of the gas water heater is improved, meanwhile, the time required by output heat regulation is reduced, the probability that the time required by output heat regulation exceeds the preset standard time range is reduced, and the use experience of a user is ensured.

In any one of the above technical solutions, the configuration parameters of the gas water heater include: the number of the gas nozzles of the gas water heater, the diameter of the gas nozzles and the flow coefficient of the gas nozzles.

According to a second aspect of the present invention, there is provided a control device for a gas water heater, the gas water heater including a gas proportional valve and a pressure detection device provided at a gas outlet of the gas proportional valve of the gas water heater, the control device for the gas water heater including: the acquisition unit is used for acquiring the output heat of the gas water heater and controlling the pressure detection device to acquire the gas outlet pressure value of the gas outlet of the gas proportional valve; and the determining unit is used for determining the abnormal state of the gas water heater according to the comparison result between the gas outlet pressure value and the target pressure interval and the comparison result between the output heat and the target output heat interval.

The technical scheme of the invention provides a control device of a gas water heater, which comprises the following components: the control device comprising the gas water heater can judge whether the detected abnormality is caused by abnormal gas components when the gas water heater fails, and the control method is referred to carry out maintenance work of the abnormal gas water heater so as to reduce the maintenance difficulty of after-sales personnel.

According to a third aspect of the present invention, there is provided a gas water heater comprising: a gas proportional valve; the pressure detection device is arranged at a gas outlet of the gas proportional valve; a memory having a program or instructions stored thereon; a controller, the controller executing programs or instructions to implement such as: acquiring the output heat of the gas water heater, and acquiring the gas outlet pressure value of a gas outlet of the gas proportional valve through a pressure detection device; and determining the abnormal state of the gas water heater according to the comparison result of the gas outlet pressure value and the target pressure interval and the comparison result of the output heat and the target output heat interval.

The technical scheme of the invention provides a gas water heater, wherein the gas water heater comprises a pressure detection device and a gas proportional valve, the pressure detection device is arranged at a gas outlet of the gas proportional valve, an outlet gas pressure value detected by the pressure detection device is a secondary pressure of the gas water heater, and a program or an instruction which can be executed by a controller is stored in a memory of the gas water heater, and the program or the instruction can realize the steps of the control method of the gas water heater when being executed, so that the gas water heater has all beneficial technical effects of the control method of the gas water heater.

Specifically, when a fault occurs, the gas water heater can judge whether the detected abnormality is caused by abnormal gas components, and the control method is referred to carry out maintenance work of the abnormal gas water heater, so that the maintenance difficulty of after-sales personnel is reduced.

In any of the above technical solutions, the controller executes a program or an instruction to implement: the method comprises the following steps of determining the abnormal state of the gas water heater according to the comparison result of the gas outlet pressure value and the target pressure interval and the comparison result of the output heat and the target output heat interval, and specifically comprises the following steps: confirming that the gas of the gas water heater is normal based on the fact that the gas outlet pressure value is within the target pressure interval and the output heat is within the target output heat interval; confirming that the gas of the gas water heater is in a first abnormal state based on that the gas outlet pressure value is within the target pressure interval and the output heat is smaller than any value in the target output heat interval; and confirming that the gas of the gas water heater is in a second abnormal state based on the condition that the gas outlet pressure value is within the target pressure interval and the output heat is greater than any value in the target output heat interval.

In any of the above technical solutions, the controller executes a program or an instruction to implement: increasing the opening degree of a gas proportional valve based on the fact that gas of the gas water heater is in a first abnormal state until the output heat is located within a target output heat interval; and reducing the opening degree of the gas proportional valve based on the fact that the gas of the gas water heater is in a second abnormal state until the output heat is within the target output heat interval.

In any of the above technical solutions, the controller executes a program or an instruction to implement: sending alarm information based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is smaller than the first output heat value; or based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is larger than a second output heat value, alarm information is sent out, wherein the first output heat value is smaller than any value in the target output heat interval, and the second output heat value is larger than any value in the target output heat interval.

In any of the above technical solutions, the controller executes a program or an instruction to implement: and sending alarm information and a shutdown signal based on the gas water heater.

In any one of the above technical solutions, the gas water heater further includes: the fan and the controller execute programs or instructions to realize the following steps: and adjusting the rotating speed of the fan according to the opening degree of the fuel gas proportional valve.

In any of the above technical solutions, the controller executes a program or an instruction to implement: receiving a set target water outlet temperature, a water inlet temperature of the gas water heater, a water outlet temperature of the gas water heater and a water inlet flow of the gas water heater; determining target output heat according to the target water outlet temperature, the water inlet temperature and the water inlet flow; determining a target output heat interval according to the target output heat; and determining the output heat according to the water inlet temperature, the water outlet temperature and the water inlet flow.

According to a fourth aspect of the present invention, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, carry out the steps of the method of controlling a gas water heater as claimed in any one of the first aspects.

The technical solution of the present invention provides a readable storage medium, which has all the beneficial technical effects of the control method of the gas water heater in any one of the first aspect when being executed, since the readable storage medium stores the program or the instructions for implementing the control method of the gas water heater in any one of the first aspect when being executed, and the program or the instructions are not listed here.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a flow chart diagram of a method of controlling a gas water heater according to one embodiment of the invention;

FIG. 2 shows a flow chart diagram of a method of controlling a gas water heater according to one embodiment of the present invention;

FIG. 3 shows a flow chart diagram of a method of controlling a gas water heater according to one embodiment of the present invention;

FIG. 4 illustrates a schematic flow chart of determining an output heat and a target output heat according to one embodiment of the present invention;

FIG. 5 shows a schematic block diagram of a control device of a gas water heater according to one embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a gas water heater according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the names of the components in fig. 6 is:

600 gas water heater, 602 gas proportional valve, 604 pressure detection device, 606 memorizer, 608 controller, 610 water proportional valve, 612 gas distributing rod, 614 burner, 616 heat exchanger, 618 smoke outlet, 620 air inlet joint, 622 fan, 624 bottom shell, 626 power cord, 628 water outlet temperature sensor.

Detailed Description

So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Example one

According to a first aspect of the present invention, the present invention provides a control method of a gas water heater, wherein the gas water heater comprises a gas proportional valve and a gas outlet pressure detection device arranged on the gas proportional valve, wherein the pressure detection device is used for detecting an outlet gas pressure value at a gas outlet of the gas proportional valve, as shown in fig. 1, the control method of the gas water heater comprises:

step 102, acquiring the output heat and the air outlet pressure value of the gas water heater;

and 104, comparing the outlet gas pressure value with a target pressure interval, comparing the output heat with the target output heat interval according to the obtained first comparison result to obtain a second comparison result, and determining the abnormal state of the gas water heater according to the first comparison result and the second comparison result.

Based on the characteristics of gas trouble and the characteristics of gas proportional valve trouble, judge whether the gas is unusual with the output heat of gas heater reference to give vent to anger the pressure value in the embodiment of this application, specifically, compare the output heat and the target output heat interval of gas heater, and then whether the gas of affirming gas heater appears unusually.

In the embodiment, the maintenance difficulty of the after-sales personnel is reduced by diagnosing whether the gas components are abnormal, and in addition, the control method can be stored in the gas water heater in a program mode so that the gas water heater can automatically execute the program, self-checking is realized, and the intelligence of the gas water heater is improved.

Example two

The invention provides a control method of a gas water heater, wherein the gas water heater comprises a gas proportional valve and a gas outlet pressure detection device arranged on the gas proportional valve, the pressure detection device is used for detecting the outlet pressure value at the gas outlet of the gas proportional valve, and as shown in figure 2, the control method of the gas water heater comprises the following steps:

step 202, acquiring the output heat and the air outlet pressure value of the gas water heater;

step 204, determining that the gas outlet pressure value is within a target pressure interval and the output heat is within a target output heat interval, and ensuring that the gas of the gas water heater is normal;

step 206, determining that the gas outlet pressure value is within the target pressure interval and the output heat is smaller than any value in the target output heat interval, and then the gas of the gas water heater is in a first abnormal state;

and 208, determining that the gas outlet pressure value is within the target pressure interval and the output heat is greater than any value in the target output heat interval, and then the gas of the gas water heater is in a second abnormal state.

In the embodiment, in order to ensure the accuracy and the reliability of the gas abnormality determination, the abnormal condition of the component of the gas is divided into the first abnormal state and the second abnormal state, so that the gas water heater can execute the corresponding control strategy according to the determined abnormal state. In order to reduce the probability that the gas produces a large amount of waste gas because of insufficient combustion, the gas heater is ensured to output stable heat, the probability that the output heat exceeds the preset heat standard range is reduced, meanwhile, the time required by output heat regulation is also reduced, the probability that the time required by adjusting the output heat exceeds the preset standard time range is reduced, and the use experience of a user is ensured.

In one embodiment, based on the fact that the gas of the gas water heater is in a first abnormal state, the opening degree of the gas proportional valve is increased until the output heat is within a target output heat interval; and reducing the opening degree of the gas proportional valve based on the fact that the gas of the gas water heater is in a second abnormal state until the output heat is within the target output heat interval.

In order to solve the above problems, it is considered that a device capable of influencing whether the combustion is sufficient or not or the magnitude of the output heat in the gas water heater may be a gas proportional valve, and therefore, the opening degree of the gas proportional valve may be adjusted to adapt to the gas with abnormal components, so that the gas water heater can still be used under the condition that the injected gas has abnormal components, and the gas water heater can be adapted to different use scenes by operating the above embodiments of the present application, thereby improving the compatibility of the product with the gas with different components.

EXAMPLE III

The invention provides a control method of a gas water heater, wherein the gas water heater comprises a gas proportional valve and a gas outlet pressure detection device arranged on the gas proportional valve, the pressure detection device is used for detecting the outlet pressure value at the gas outlet of the gas proportional valve, and as shown in fig. 3, the control method of the gas water heater comprises the following steps:

step 302, acquiring the output heat and the air outlet pressure value of the gas water heater;

step 304, based on the fact that the outlet air pressure value is within the target pressure interval and the output heat is smaller than the first output heat value, sending alarm information; or based on the fact that the air outlet pressure value is within the target pressure range and the output heat is larger than the second output heat value, alarm information is sent out.

The first output heat value is smaller than any value in the target output heat interval, and the second output heat value is larger than any value in the target output heat interval.

In this embodiment, although the gas water heater can be compatible with gas with different components, a part of the gas cannot be used due to different product designs, and since different gas can be distinguished according to the output heat of the gas water heater, a first output heat value and a second output heat value are correspondingly set for the gas, so that the output heat of the gas water heater is compared with the first output heat value and the second output heat value, and the gas which cannot be used by the gas water heater is distinguished.

In any of the above embodiments, the control method of the gas water heater further includes: and sending alarm information and a shutdown signal based on the gas water heater.

In the embodiment, when the alarm information is sent out, a shutdown signal is generated so that the gas water heater executes shutdown operation. In the process, the shutdown operation of the gas water heater is controlled, so that the probability of damage to the gas water heater due to abnormal gas components is reduced, and the self-protection of the product is realized.

In any of the above embodiments, the form of the alarm information includes, but is not limited to, sound alarm information, and may also be light alarm information, or a composite alarm information in which sound alarm information and light alarm information are used in combination. The alarm information can be sent to a server for data interaction with the gas water heater, so that the server can be used for forwarding the alarm information to a terminal of a user to remind the user of timely processing. In the process, a warning mode of the warning information is provided, the probability that the warning information is sensed by a user is improved, and then the probability that the gas water heater is damaged due to the fact that abnormal gas is used for a long time is reduced.

Example four

In any of the above embodiments, the gas water heater further comprises: the control method of the fan and the gas water heater further comprises the following steps: and adjusting the rotating speed of the fan according to the opening degree of the fuel gas proportional valve.

In the embodiment, the gas water heater is also provided with the fan, wherein the fan can provide air for the gas water heater in the operation process, insufficient combustion can occur due to insufficient injected air when gas is combusted, when the gas is combusted insufficiently, the gas water heater can generate a large amount of waste gas, meanwhile, the gas water heater can generate vibration along with the insufficient combustion to generate squeaking, and the occurrence of the above conditions can increase the gas consumption of the gas water heater and increase the use cost of products; meanwhile, the use experience of a user can be seriously influenced by large vibration and corresponding noise, and the user feels that the gas water heater runs dangerously.

In one embodiment, when the configuration information of the gas water heater is fixed, the opening degree of the gas proportional valve and the outlet air pressure value are in a one-to-one correspondence relationship, so the step of determining the rotation speed of the fan based on the outlet air pressure value having the correspondence relationship with the opening degree of the gas proportional valve may include: acquiring a corresponding relation between a rotating speed fluctuation interval of the fan and an air outlet pressure value; determining a target fluctuation interval of the fan according to the corresponding relation and the air outlet pressure value; and adjusting the running current of the fan according to the comparison result of the rotating speed of the fan and the target fluctuation interval.

In this embodiment, the gas water heater generates heat by burning gas, and the gas needs a fan to supplement air when burning so that the gas can be burnt. As is known, insufficient combustion occurs due to insufficient injected air during combustion of gas, when the gas is insufficiently combusted, a gas water heater generates a large amount of waste gas, and meanwhile, the gas water heater generates vibration along with the insufficient combustion to generate squeaking, and the occurrence of the above situation increases the gas consumption of the gas water heater and increases the use cost of products; meanwhile, the use experience of a user can be seriously influenced by large vibration and corresponding noise, and the user feels that the gas water heater runs dangerously.

In order to reduce the occurrence of the above situation, a mapping relation between a fluctuation interval of the fan rotating speed and the outlet air pressure value, namely a corresponding relation related in the application, is constructed in advance, so that after the outlet air pressure value is determined, a target fluctuation interval corresponding to the fan pressure value is determined, namely, the optimal fan rotating speed is determined according to the corresponding relation, and the fan is controlled to operate according to the target fluctuation interval. Because the gas burning is abundant, can reduce the volume that the gas was wasted, reduced gas heater's amplitude of vibration and gas heater's noise simultaneously to user's use experience has been improved.

In any of the above embodiments, the step of adjusting the operating current of the fan according to the comparison result between the rotation speed of the fan and the target fluctuation interval specifically includes: keeping the running current of the fan unchanged based on the fact that the rotating speed of the fan is within the target fluctuation interval; and adjusting the running current of the fan based on the fact that the rotating speed of the fan is located outside the target fluctuation interval until the rotating speed of the fan is located within the target fluctuation interval.

In this embodiment, in a normal case, the opening degree of the gas proportional valve and the rotation speed fluctuation interval of the fan are in one-to-one correspondence, that is, the opening degree of one gas proportional valve has a target fluctuation interval, and under the condition that the opening degree of the gas proportional valve is fixed, the gas in the gas water heater can be sufficiently combusted only when the rotation speed of the fan is within the fluctuation interval, and the condition that the gas is insufficiently combusted cannot occur.

Therefore, in the process of comparing the rotating speed of the fan with the determined target fluctuation interval, the rotating speed of the fan needs to be controlled to be maintained within the target fluctuation interval, so that the gas in the gas water heater can be fully combusted, the occurrence of the situation that the gas is insufficiently combusted is reduced, the amount of the waste gas can be reduced, the vibration amplitude of the gas water heater and the noise of the gas water heater are reduced, and the use experience of a user is improved finally.

When the rotating speed of the fan is not within the target fluctuation interval, the rotating speed of the fan needs to be adjusted to be within the target fluctuation interval, specifically, when the rotating speed of the fan is smaller than the minimum value of the target fluctuation interval, the operating current of the fan is adjusted to increase the rotating speed of the fan, and when the rotating speed of the corresponding fan is larger than the maximum value of the target fluctuation interval, the operating current of the fan is adjusted to decrease the rotating speed of the fan, so that the rotating speed of the fan finally falls into the target fluctuation interval, and the fan can provide enough air under the working condition of an air outlet pressure value to maintain the sufficient combustion of fuel gas.

In addition, the rotational speed of fan and the aperture of gas proportional valve can be adjusted in step, adjust simultaneously through the rotational speed of control fan and the aperture of gas proportional valve to when gas heater's secondary pressure fluctuates, gas heater's secondary pressure can be adjusted fast, and then reduces gas heater output heat and adjusts required time, reduces the probability that the time that adjustment output heat needs surpasss outside the standard time scope that sets for in advance, has ensured user's use and has experienced.

EXAMPLE five

In any of the above embodiments, the determination process of the output heat amount and the target output heat amount is specifically defined, and specifically, as shown in fig. 4, the determination process of the output heat amount and the target output heat amount includes:

step 402, receiving a set target water outlet temperature, a water inlet temperature of a gas water heater, a water outlet temperature of the gas water heater and a water inlet flow of the gas water heater;

step 404, determining target output heat according to the target water outlet temperature, the water inlet temperature and the water inlet flow;

step 406, determining a target output heat interval according to the target output heat;

and step 408, determining output heat according to the water inlet temperature, the water outlet temperature and the water inlet flow.

In this embodiment, the target output heat interval is not constant, but is determined according to the operating parameters of the gas water heater. The working condition parameters of the gas water heater include configuration information and environment parameters (such as water inlet temperature, water outlet temperature and water inlet flow of the gas water heater) in the actual use scene of the gas water heater. In general, after the specification of the gas water heater is determined, the configuration information of the gas water heater is also fixed and does not change. Similarly, under the condition that the water inlet temperature and the water inlet flow of the gas water heater are determined, the target output heat interval of the gas water heater and the water outlet temperature of the gas water heater are in a positive correlation, so that the corresponding target output heat interval can be determined according to the water outlet temperature.

In any of the above embodiments, the process of determining the target output heat interval specifically includes: determining target output heat according to the target water outlet temperature, the target water inlet temperature and the target water inlet flow; and determining a target output heat interval according to the target output heat.

In any of the above embodiments, the configuration parameters of the gas water heater include: the number of the gas nozzles of the gas water heater, the diameter of the gas nozzles and the flow coefficient of the gas nozzles.

In one embodiment, the control method of the gas water heater further comprises: and determining the gas consumption of the gas water heater according to the number of the gas nozzles, the diameter of the gas nozzles, the flow coefficient of the gas nozzles and the gas outlet pressure value.

In this embodiment, since the outlet pressure value is detected by the pressure detection device and can be used to represent the secondary pressure value of the gas water heater, the gas consumption can be determined according to the outlet pressure value and the configuration information of the gas water heater, specifically, the calculation formula is as follows:

wherein Q is the gas consumption, n is the number of gas nozzles, mu is the flow coefficient of the gas nozzles, dg is the diameter of the gas nozzles, and H is the pressure value of the outlet gas.

In this process, the gas water heater can detect the consumed gas amount so that the user can know, and specifically, the gas water heater further comprises a display device, and the gas water heater can display the gas consumption amount by using the display device, so that the user can read the gas consumption amount conveniently.

In one embodiment, the gas consumption may be stored in the storage device of the gas water heater in the form of a parameter code, so that when a problem occurs in the gas water heater, an after-sales person may query the gas consumption, determine whether the gas water heater is in a fault according to the gas consumption, and further assist the after-sales person in performing fault diagnosis.

EXAMPLE six

In an embodiment of the second aspect of the present invention, as shown in fig. 5, the present invention provides a control device 500 of a gas water heater, the gas water heater comprising a gas proportional valve and a pressure detection device disposed at a gas outlet of the gas proportional valve of the gas water heater, the control device 500 of the gas water heater comprising: an obtaining unit 502, configured to obtain output heat of the gas water heater and control the pressure detection device to obtain an outlet pressure value of a gas outlet of the gas proportional valve; the determining unit 504 is configured to determine an abnormal state of the gas water heater according to a comparison result between the gas outlet pressure value and the target pressure interval and a comparison result between the output heat and the target output heat interval.

An embodiment of the present invention provides a control device 500 of a gas water heater, the control device 500 of the gas water heater including: the obtaining unit 502 and the determining unit 504, including the control device 500 of the gas water heater, can determine whether the detected abnormality is caused by the abnormal gas component when the gas water heater is in failure, and refer to the control method to perform the maintenance work of the abnormal gas water heater, so as to reduce the maintenance difficulty of the after-sales personnel.

EXAMPLE seven

In an embodiment of the third aspect of the present invention, as shown in fig. 6, there is provided a gas water heater 600 comprising: a gas proportional valve 602; a pressure detection device 604 arranged at a gas outlet of the gas proportional valve 602; a memory 606, the memory 606 having programs or instructions stored thereon; the controller 608 executes a program or an instruction to achieve, for example, obtaining the output heat of the gas water heater, and obtaining the outlet pressure value of the gas outlet of the gas proportional valve through the pressure detection device; and determining the abnormal state of the gas water heater according to the comparison result of the gas outlet pressure value and the target pressure interval and the comparison result of the output heat and the target output heat interval. An embodiment of the present invention provides a gas water heater 600, wherein the gas water heater 600 includes a pressure detection device 604 and a gas proportional valve 602, wherein the pressure detection device 604 is disposed at a gas outlet of the gas proportional valve 602, a value of an outlet gas pressure detected by the pressure detection device 604 is a secondary pressure of the gas water heater 600, and since a program or an instruction capable of being executed by a controller 608 is stored in a memory 606 of the gas water heater 600, and when the program or the instruction is executed, the steps of the control method of the gas water heater 600 according to any one of the above-mentioned methods can be implemented, so that the gas water heater 600 has all the beneficial technical effects of the control method of the gas water heater according to any one of the above-mentioned methods.

Specifically, when a fault occurs, the gas water heater 600 can determine whether the detected abnormality is caused by abnormal gas components, and the control method is referred to perform maintenance work on the abnormal gas water heater 600, so that the maintenance difficulty of after-sales personnel is reduced.

The fault of the gas water heater 600 may be a fault of the gas proportional valve 602, or may be an abnormal gas component, or may be caused by a fault of another component, in a normal case, when the gas proportional valve 602 is abnormal, an outlet pressure value detected by a pressure detection device arranged at a gas outlet of the gas proportional valve 602 is abnormal, such as exceeding a target pressure interval, and the abnormal gas component mainly considers whether a heat value of the gas is too large or too small. By separately dividing the fault of abnormal gas components, the abnormal conditions can be determined in time when the gas water heater 600 is abnormal, so that the maintenance difficulty of after-sales personnel is reduced.

Based on the characteristics of the gas fault and the characteristics of the gas proportional valve 602 fault, in the embodiment of the present application, it is determined whether the gas is abnormal by referring to the gas outlet pressure value and the output heat of the gas water heater 600, specifically, the output heat of the gas water heater 600 is compared with the target output heat interval, and then it is determined whether the gas of the gas water heater 600 is abnormal.

The process of checking for anomalies in the gas water heater 600 essentially comprises two steps, the first: it is determined whether the fault is a fault of the gas proportional valve 602, specifically, the outlet pressure value is compared with the target pressure interval, and when the outlet pressure value is in the target pressure interval, it is determined that the gas proportional valve 602 is not abnormal, and in the second step, it is determined whether the abnormality is caused by an abnormality of the gas component, and it is known from the above-mentioned description that the gas component corresponds to the heat value thereof, and therefore, it is possible to determine whether the gas component is abnormal by measuring the output heat of the gas water heater 600 under the condition that the gas proportional valve 602 is normal.

In this embodiment, the difficulty in maintenance of after-market personnel is reduced by diagnosing whether the gas component is abnormal, and in addition, the control method can be stored in the gas water heater 600 in a program manner, so that the gas water heater 600 automatically executes the program, self-checking is realized, and the intellectualization of the gas water heater 600 is improved.

In any of the above embodiments, the controller executes the program or instructions to implement such as: the step of determining the abnormal state of the gas water heater 600 according to the comparison result between the gas outlet pressure value and the target pressure interval and the comparison result between the output heat and the target output heat interval specifically includes: confirming that the gas of the gas water heater 600 is normal based on the outlet pressure value being within the target pressure interval and the output heat being within the target output heat interval; confirming that the gas of the gas water heater 600 is in a first abnormal state based on that the gas outlet pressure value is within the target pressure interval and the output heat is smaller than any value in the target output heat interval; and confirming that the gas of the gas water heater 600 is in the second abnormal state based on the gas outlet pressure value being within the target pressure interval and the output heat being greater than any value in the target output heat interval.

In this embodiment, in order to ensure the accuracy and reliability of the gas abnormality determination, the abnormal condition of the component of the gas is divided into the first abnormal state and the second abnormal state, so that the gas water heater 600 can execute the corresponding control strategy according to the determined abnormal state. In order to reduce the probability that the gas is insufficient because of burning, gas heater 600 produces a large amount of waste gas, at this in-process, ensure that gas heater 600 can export stable heat, reduce the probability that the output heat surpasses outside the preset heat standard range, simultaneously, also reduced the required time of output heat regulation, reduce the probability that the time that adjustment output heat needs surpasss outside the preset standard time range, ensured user's use and experienced.

Specifically, the determination condition of the first abnormal state may be replaced by that the outlet pressure value is in the target pressure interval and the output heat is lower than the minimum value of the target output heat interval, correspondingly, the determination condition of the second abnormal state may be replaced by that the outlet pressure value is in the target pressure interval and the output heat is higher than the maximum value of the target output heat interval, by comparing the output heat with the maximum value of the target output heat interval and the minimum value of the target output heat interval, the need to compare the output heat with any value in the target output heat interval is avoided, and since the data amount to be compared is reduced, the data amount processed by the gas water heater 600 may be reduced, which is beneficial to reducing the hardware requirement of the gas water heater 600 and is convenient to control the cost of the gas water heater 600.

In any of the above embodiments, the controller executes the program or instructions to implement such as: based on that the gas of the gas water heater 600 is in a first abnormal state, increasing the opening degree of the gas proportional valve 602 until the output heat is within a target output heat interval; based on the fact that the gas of the gas water heater 600 is in the second abnormal state, the opening degree of the gas proportional valve 602 is reduced until the output heat is within the target output heat interval.

In general, when the gas component is abnormal, the gas water heater 600 may not meet the heat demand of the gas water heater 600 because the gas water heater is directly insufficient in combustion or the output heat is small.

In order to solve the above problems, considering that the device capable of influencing whether the combustion is sufficient or not or the amount of output heat in the gas water heater 600 may be the gas proportional valve 602, therefore, the opening degree of the gas proportional valve 602 may be adjusted to adapt to the gas with abnormal composition, so that the gas water heater 600 can still be used in the case of abnormal composition of the injected gas, and by operating the above embodiments of the present application, the gas water heater 600 may be adapted to different usage scenarios, thereby improving the compatibility of the product with the gas with different compositions.

Specifically, when the abnormal state of the gas is detected as the first abnormal state, the calorific value of the gas is determined to be too low, and at this time, the injection amount of the gas is increased by increasing the opening degree of the gas proportional valve 602 so that the amount of the gas combusted at the same time is increased; and when the abnormal state of the gas is detected as the second abnormal state, the calorific value of the gas is determined to be too high, and the opening degree of the gas proportional valve 602 is reduced to reduce the injection amount of the gas in order to obtain a proper heat output. In this process, the output heat of the gas water heater 600 is ensured to be within the target output heat interval by adjusting the opening degree of the gas proportional valve 602, so that the gas water heater 600 can stably output the heat required by the user.

In any of the above embodiments, the controller executes the program or instructions to implement such as: sending alarm information based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is smaller than the first output heat value; or based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is larger than a second output heat value, alarm information is sent out, wherein the first output heat value is smaller than any value in the target output heat interval, and the second output heat value is larger than any value in the target output heat interval.

In this embodiment, although the gas water heater 600 is compatible with gases with different components, a part of the gases cannot be used due to different product designs, and since different gases can be distinguished according to the output heat of the gas water heater 600, a first output heat value and a second output heat value are correspondingly set for the gases, so as to compare the output heat of the gas water heater 600 with the first output heat value and the second output heat value, and further distinguish the gases that cannot be used by the gas water heater 600.

After the part of gas is distinguished, alarm information can be output, so that a user can process abnormal gas in time. Wherein, the treatment mode can be gas replacement. In the process, the alarm information is output to remind a user to process the gas water heater, so that the risk of damage to the gas water heater 600 due to the use of the gas with abnormal components is reduced, meanwhile, the phenomenon that the abnormal gas is insufficiently combusted to cause excessive waste gas discharged by the gas water heater 600 is reduced, and meanwhile, the gas water heater 600 vibrates along with the insufficient combustion to generate squeaking, so that the gas consumption of the gas water heater 600 is increased and the use cost of the product is increased; meanwhile, the use experience of the user can be seriously influenced by large vibration and corresponding noise, and the user feels that the gas water heater 600 runs dangerously.

In one embodiment, the first and second calorific output values constitute a safe calorific output interval of the gas water heater 600, wherein the safe calorific output interval is related to the composition of the gas.

In any of the above embodiments, the controller executes the program or instructions to implement such as: based on the alarm information sent by the gas water heater 600, a shutdown signal is sent.

In this embodiment, when the alarm information is sent, a shutdown signal is generated so that the gas water heater 600 performs a shutdown operation. In the process, the shutdown operation is executed by controlling the gas water heater 600, so that the probability of damage to the gas water heater 600 due to abnormal gas components is reduced, and the self-protection of the product is realized.

In any of the above embodiments, the form of the alarm information includes, but is not limited to, sound alarm information, and may also be light alarm information, or a composite alarm information in which sound alarm information and light alarm information are used in combination.

In one embodiment, the alarm information may also be sent to a server performing data interaction with the gas water heater 600, so that the server is used to forward the alarm information to a terminal of a user to remind the user to perform processing in time. In the process, a warning mode of the warning information is provided, the probability that the warning information is sensed by a user is improved, and then the probability that the gas water heater 600 is damaged due to the fact that abnormal gas is used for a long time is reduced.

In any of the above embodiments, the gas water heater 600 further comprises: fan 622, the controller executes the program or instructions to implement such as: and adjusting the rotation speed of the fan 622 according to the opening degree of the gas proportional valve 602.

In this embodiment, the gas water heater 600 is further provided with a fan 622, wherein the fan 622 provides air to the gas water heater 600 during operation, insufficient combustion occurs due to insufficient injected air during combustion of gas, when insufficient combustion occurs, the gas water heater 600 generates a large amount of waste gas, and simultaneously, the gas water heater 600 generates vibration along with insufficient combustion to generate squeal, and due to the occurrence of the above conditions, the gas consumption of the gas water heater 600 is increased, and the use cost of the product is increased; meanwhile, the use experience of the user can be seriously influenced by large vibration and corresponding noise, and the user feels that the gas water heater 600 runs dangerously.

In order to reduce the above situations, the rotation speed of the fan 622 may be determined according to the opening degree of the gas proportional valve 602, and the fan 622 is controlled to operate according to the rotation speed, in this process, it is ensured that the fan 622 can supplement sufficient air so that the gas is sufficiently combusted, and the situation that the gas is insufficiently combusted is reduced. Because the gas burning is abundant, can reduce the volume that the gas was wasted, reduced gas heater 600's the range of vibration and gas heater 600's noise simultaneously to user's use experience has been improved.

Specifically, a mapping relation between the rotation speed of the fan 622 and the opening degree of the gas proportional valve 602 may be constructed in advance, or a mapping relation between the rotation speed of the fan 622 and the outlet pressure value may be constructed in advance, and the rotation speed of the fan 622 is determined based on the outlet pressure value having a corresponding relation with the opening degree of the gas proportional valve 602.

In any of the above embodiments, the controller executes the program or instructions to implement such as: receiving a set target outlet water temperature, an inlet water temperature of the gas water heater 600, an outlet water temperature of the gas water heater 600 and an inlet water flow of the gas water heater 600; determining target output heat according to the target water outlet temperature, the water inlet temperature and the water inlet flow; determining a target output heat interval according to the target output heat; and determining the output heat according to the water inlet temperature, the water outlet temperature and the water inlet flow.

In this embodiment, the target output heat interval is not constant, but is determined according to the operating parameters of the gas water heater 600. The operating parameters of the gas water heater 600 include configuration information and environmental parameters (such as the water inlet temperature and the water outlet temperature of the gas water heater 600 and the water inlet flow rate of the gas water heater 600) in the actual use scenario of the gas water heater 600. In general, after the specification of the gas water heater 600 is determined, the configuration information of the gas water heater 600 is also fixed and does not change. Similarly, when the inlet water temperature and the inlet water flow of the gas water heater 600 are determined, the target output heat interval of the gas water heater 600 and the outlet water temperature of the gas water heater 600 are in a positive correlation, so that the corresponding target output heat interval can be determined according to the outlet water temperature.

Because the control process belongs to a dynamic process, the output heat of the gas water heater 600 does not fluctuate greatly, the running stability of the gas water heater 600 is improved, meanwhile, the time required by output heat regulation is reduced, the probability that the time required by regulating the output heat exceeds the preset standard time range is reduced, and the use experience of a user is ensured.

In any of the above embodiments, the configuration parameters of the gas water heater 600 include: the number of gas nozzles, the diameter of the gas nozzles, and the flow coefficient of the gas nozzles of the gas water heater 600.

In the gas water heater 600, the gas water heater 600 further includes: water proportional valve 610, temperature sensor and water flow sensor of intaking, wherein, temperature sensor and water flow sensor integrated the setting on water proportional valve of intaking, through integrated the setting, effectively reduced gas heater 600's volume, the miniaturization of the product of being convenient for.

In the gas water heater 600, the gas water heater 600 further includes: a gas distribution rod 612, wherein the gas distribution rod 612 is disposed between the gas proportional valve 602 and the gas nozzles for distributing the gas to the plurality of gas nozzles.

In the gas water heater 600, the gas water heater 600 further includes: a burner 614 and a heat exchanger 616, wherein a gas nozzle is provided inside the burner 614 to allow gas to be burned and to exchange heat in the heat exchanger 616, and the burned gas is discharged out of the gas water heater 600 through a smoke outlet 618.

In one embodiment, the gas water heater 600 further comprises: and the gas water heater 600 injects gas into the gas water heater 600 through the gas inlet joint 620 so as to maintain the gas consumption of the gas water heater 600.

In one embodiment, the blower 622 is used to provide air so that the combustion gases can be fully combusted.

In one embodiment, the gas water heater 600 further comprises: a bottom shell 624, wherein the burner 614, the heat exchanger 616 and the smoke outlet 618 are disposed in the bottom shell 624 and connected to a power source by a power cord 626 so that the gas water heater 600 operates in a powered state.

In one embodiment, the gas water heater 600 further comprises: an outlet water temperature sensor 628, wherein the outlet water temperature sensor 628 is used for detecting the outlet water temperature of the gas water heater 600.

In one embodiment, the gas water heater 600 further includes a display device through which alarm information is displayed.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The control flow of the gas water heater specifically comprises the following steps:

the first stage is as follows: setting the outlet water temperature as T (namely the target outlet water temperature), calculating theoretical heat output W1 ═ Q × (T-T0) according to inlet water temperature T0 detected by the inlet water temperature sensor, outlet water temperature Tt detected by the outlet water temperature sensor and water flow Q (namely inlet water flow) detected by the water flow sensor, and calculating actual heat output W2 ═ Q × (T-T0).

And a second stage: according to theoretical heat output W₁Setting the actual heat output at [ W ]_min，W_max]Within the range, the actual water outlet temperature can reach the reasonable deviation range of the set water outlet temperature to satisfy the normal water demand of the user, wherein [ W_min，W_max]I.e. the target output heat interval in the present application.

And a third stage: setting the Heat output Range [ W_min1，W_max1]The actual water outlet temperature is ensured to reach the safety deviation range of the set water outlet temperature, so as to meet the safe water use requirement of a user; setting the secondary pressure of fuel gas at [ H ]_min，H_max]To ensure that the system combustion provides sufficient heat load.

Wherein [ W ]_min1，W_max1]I.e. a safe output heat value interval composed of a first output heat value and a second output heat value, [ H ]_min，H_max]I.e. the target pressure interval.

When the secondary pressure H detected by the secondary pressure sensor of the gas proportional valve is within the deviation range of the preset value [ H_min，H_max]Internal, and actual heat output W₂Also within a preset heat output deviation range [ W ]_min，W_max]In the inner, the combustion is normal.

When the secondary pressure H detected by the secondary pressure sensor of the gas proportional valve is within the deviation range of the preset value [ H_min，H_max]Internal, but actual heat output W₂Less than a predetermined heat output W_minIs shown byThe gas has abnormal components and small heat value, the opening degree of a gas proportional valve needs to be increased, and the secondary pressure H needs to be increased, so that the actual heat output W is realized₂Increasing to a preset heat output deviation range W_min，W_max]Thereby meeting the water demand of users. At the same time, the controller will output actual heat W₂The signal is processed, an instruction is output, the rotating speed n of the fan is correspondingly finely adjusted, the air quantity is matched with the secondary pressure of the fuel gas, the proper air-fuel ratio is ensured, and the complete machine system is fully combusted.

The secondary pressure H detected by the secondary pressure sensor of the gas proportional valve is within the deviation range of the preset value [ H_min，H_max]Internal, but actual heat output W₂Less than a predetermined heat output W_min1The controller sends out an instruction, gives an alarm and closes the gas water heater.

When the secondary pressure H detected by the secondary pressure sensor of the gas proportional valve is within the deviation range of the preset value [ H_min，H_max]Internal, but actual heat output W₁Greater than a predetermined heat output W_maxIndicating that the gas composition is abnormal, the heat value is large, the opening degree of a gas proportional valve needs to be reduced, the secondary pressure H needs to be reduced, and the actual heat output W is enabled₁Reduce to the preset heat output deviation range W_min，W_max]Thereby meeting the water demand of users. At the same time, the controller will output actual heat W₁The signal is processed, an instruction is output, the rotating speed n of the fan is correspondingly finely adjusted, the air quantity is matched with the reduction of the secondary pressure of the fuel gas, the proper air-fuel ratio is ensured, and the complete machine system is fully combusted.

The secondary pressure H detected by the secondary pressure sensor of the gas proportional valve is within the deviation range of the preset value [ H_min，H_max]Internal, but actual heat output W₂Greater than a predetermined heat output W_max1The controller sends out an instruction, gives an alarm and closes the gas water heater.

In the embodiment, through the control flow, the self-diagnosis and treatment of the gas water heater are realized when the gas components are abnormal, so that the intelligence of the product is improved.

Example eight

In an embodiment of the fourth aspect of the present invention, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, carry out the steps of the method of controlling a gas water heater as claimed in any one of the preceding claims.

Embodiments of the present invention provide a readable storage medium, which has a program or instructions stored thereon, when the program or instructions is executed, to implement the control method of the gas water heater, so that the program or instructions of the readable storage medium have all the advantages of the control method of the gas water heater, and are not listed here.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., 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 present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method of a gas water heater is characterized in that the gas water heater comprises a gas proportional valve and a pressure detection device, wherein the pressure detection device is arranged at a gas outlet of the gas proportional valve of the gas water heater, and the control method of the gas water heater comprises the following steps:

acquiring the output heat of the gas water heater, and acquiring the gas outlet pressure value of a gas outlet of the gas proportional valve through the pressure detection device;

and determining the abnormal state of the gas water heater according to the comparison result of the gas outlet pressure value and the target pressure interval and the comparison result of the output heat and the target output heat interval.

2. The method according to claim 1, wherein the step of determining the abnormal state of the gas water heater according to the comparison result between the outlet pressure value and the target pressure interval and the comparison result between the output heat and the target output heat interval specifically comprises:

confirming that the gas of the gas water heater is normal based on the condition that the gas outlet pressure value is within the target pressure interval and the output heat is within the target output heat interval;

confirming that the gas of the gas water heater is in a first abnormal state based on that the gas outlet pressure value is within the target pressure interval and the output heat is smaller than any value in the target output heat interval;

and confirming that the gas of the gas water heater is in a second abnormal state based on that the gas outlet pressure value is within the target pressure interval and the output heat is larger than any value in the target output heat interval.

3. The control method of a gas water heater according to claim 2, further comprising:

increasing the opening degree of the gas proportional valve based on the fact that the gas of the gas water heater is in a first abnormal state until the output heat is located within the target output heat interval;

and reducing the opening degree of the gas proportional valve based on the fact that the gas of the gas water heater is in a second abnormal state until the output heat is positioned within the target output heat interval.

4. The control method of a gas water heater according to any one of claims 1 to 3, further comprising:

sending alarm information based on the fact that the air outlet pressure value is within the target pressure interval and the output heat is smaller than a first output heat value; or

Sending alarm information based on the condition that the air outlet pressure value is within the target pressure interval and the output heat is greater than a second output heat value,

5. The control method of a gas water heater according to claim 4, further comprising:

and sending out a shutdown signal based on the alarm information sent by the gas water heater.

6. The control method of a gas water heater according to claim 3, further comprising: the control method of the gas water heater also comprises the following steps:

and adjusting the rotating speed of the fan according to the opening degree of the gas proportional valve.

7. The control method of a gas water heater according to any one of claims 1 to 3, further comprising:

receiving a set target water outlet temperature, a water inlet temperature of the gas water heater, a water outlet temperature of the gas water heater and a water inlet flow of the gas water heater;

determining target output heat according to the target water outlet temperature, the water inlet temperature and the water inlet flow;

determining the target output heat interval according to the target output heat;

and determining the output heat according to the water inlet temperature, the water outlet temperature and the water inlet flow.

8. The control device of the gas water heater is characterized in that the gas water heater comprises a gas proportional valve and a pressure detection device arranged at a gas outlet of the gas proportional valve of the gas water heater, and the control device of the gas water heater comprises:

the acquiring unit is used for acquiring the output heat of the gas water heater and controlling the pressure detecting device to acquire the gas outlet pressure value of the gas outlet of the gas proportional valve;

and the determining unit is used for determining the abnormal state of the gas water heater according to the comparison result of the gas outlet pressure value and the target pressure interval and the comparison result of the output heat and the target output heat interval.

9. A gas water heater, comprising:

a gas proportional valve;

the pressure detection device is arranged at a gas outlet of the gas proportional valve;

a memory having a program or instructions stored thereon;

a controller that executes the program or instructions to implement such as:

10. The gas water heater of claim 9, wherein execution of the program or instructions by the controller effects such as:

according to the comparison result between the gas outlet pressure value and the target pressure interval and the comparison result between the output heat and the target output heat interval, determining the abnormal state of the gas water heater, which specifically comprises the following steps:

11. The gas water heater of claim 9, wherein execution of the program or instructions by the controller effects such as:

12. The gas water heater of claim 9, wherein execution of the program or instructions by the controller effects such as:

13. The gas water heater of claim 9, wherein execution of the program or instructions by the controller effects such as:

14. The gas water heater of claim 9, further comprising: the fan, the controller carries out the procedure or instruction and realizes like:

15. The gas water heater of claim 9, wherein execution of the program or instructions by the controller effects such as:

16. A readable storage medium on which a program or instructions are stored, characterized in that said program or instructions, when executed by a processor, implement the steps of a control method of a gas water heater according to any one of claims 1 to 7.