CN114136010A - Control method and control device of gas water heater - Google Patents
Control method and control device of gas water heater Download PDFInfo
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- CN114136010A CN114136010A CN202111478298.3A CN202111478298A CN114136010A CN 114136010 A CN114136010 A CN 114136010A CN 202111478298 A CN202111478298 A CN 202111478298A CN 114136010 A CN114136010 A CN 114136010A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 189
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000015654 memory Effects 0.000 claims description 21
- 230000002159 abnormal effect Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 99
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The invention discloses a control method and a control device of a gas water heater, wherein the gas water heater is provided with a gas subsection valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, and the control method comprises the following steps: acquiring the working state of the gas sectional valve and the current required heat load of the gas water heater; judging whether the gas sectional valve is in a frequent switching state or not; and when the gas section valve is in a frequent switching state, the water proportional valve is adjusted according to the current heat load required by the gas water heater. So set up, when the gas segmentation valve is in frequently switching state, adjust the discharge of water proportional valve according to current demand heat load numerical value for gas heater avoids the heat load to break the shelves interval, and under this condition, the heat load can remain linear variation throughout, thereby can avoid the frequent switching of gas segmentation valve, keeps out water temperature stable.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a control method and a control device of a gas water heater.
Background
When the gas pressure in the existing constant-temperature gas water heater is too low, an actual subsection heat load overlapping area deviates, the numerical value is far lower than a designed value when the gas pressure is too low, and the heat load is disconnected and cannot be adjusted linearly, so that the subsection valve of the combustor is switched frequently.
Because the water temperature fluctuation is large when the sectional valve is frequently switched, the water temperature is suddenly cooled and suddenly heated and is not constant, and the normal use of a user is influenced.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is that the normal use of a user is influenced due to the fact that the water temperature fluctuates greatly when the sectional valve is frequently switched and the water temperature fluctuates suddenly and does not keep constant, so that the control method and the control device of the gas water heater are provided.
According to a first aspect, an embodiment of the invention provides a control method of a gas water heater, the gas water heater is provided with a gas subsection valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, and the control method comprises the following steps: acquiring the working state of the gas sectional valve and the current required heat load of the gas water heater; judging whether the gas sectional valve is in a frequent switching state or not; and when the gas section valve is in a frequent switching state, the water proportional valve is adjusted according to the current heat load required by the gas water heater.
Optionally, said adjusting said water proportioning valve according to a current required heat load of the gas water heater comprises: judging whether the current required heat load of the gas water heater exceeds a preset heat load or not; and if so, controlling the water proportional valve to reduce the water inlet flow to the first water inlet flow.
Optionally, the control method further includes: if not, controlling the water proportional valve to increase the water inlet flow to a second water inlet quantity, wherein the first water inlet quantity is smaller than the second water inlet quantity.
Optionally, the determining whether the gas segment valve is in a frequent switching state includes: acquiring working parameters of the gas sectional valve; judging whether the working parameters are in an abnormal state or not; and when the working parameters are in an abnormal state, judging whether the gas sectional valve is in a frequent switching state.
Optionally, the operating parameter is a current switching frequency of the gas segment valve; wherein, the judging whether the working parameters are in an abnormal state comprises: judging whether the current switching frequency exceeds a preset switching frequency or not; and when the current switching frequency exceeds the preset switching frequency, the current switching frequency is in an abnormal state.
Optionally, the preset heat load is between 26.5KW and 27.5 KW.
Optionally, the first water inflow is between 0.85 and 0.95 times of the normal water inflow; the second water inflow is 1.05 times to 1.15 times of the normal water inflow.
According to a second aspect, an embodiment of the present invention further provides a control device for a gas water heater, the gas water heater is provided with a gas segment valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, the control device includes: the acquisition module is used for acquiring the working state of the gas sectional valve and the current heat load required by the gas water heater; the processing module is used for judging whether the gas sectional valve is in a frequent switching state or not; and the adjusting module is used for adjusting the water proportional valve according to the current heat load required by the gas water heater when the gas sectional valve is in a frequent switching state.
According to a third aspect, an embodiment of the present invention further provides an electronic device, including: the control method comprises a memory and a processor, wherein the memory and the processor are connected with each other in a communication mode, computer instructions are stored in the memory, and the processor executes the computer instructions so as to execute the control method of any one of the above embodiments.
According to a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions for causing the computer to execute the control method according to any one of the above embodiments.
The embodiment of the invention has the following beneficial effects:
1. the embodiment of the invention provides a control method of a gas water heater, wherein the gas water heater is provided with a gas sectional valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, and the control method comprises the following steps: acquiring the working state of the gas sectional valve and the current required heat load of the gas water heater; judging whether the gas sectional valve is in a frequent switching state or not; and when the gas section valve is in a frequent switching state, the water proportional valve is adjusted according to the current heat load required by the gas water heater.
So set up, when the gas segmentation valve is in frequently switching state, adjust the discharge of water proportional valve according to current demand heat load numerical value for gas heater avoids the heat load to break the shelves interval, and under this condition, the heat load can remain linear variation throughout, thereby can avoid the frequent switching of gas segmentation valve, keeps out water temperature stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a control method of a gas water heater of an embodiment of the present invention;
fig. 2 is an overall flowchart of a gas water heater according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The use of gas water heaters has become very popular today. The gas water heater rapidly heats cold water flowing through the heat exchanger through a large amount of heat generated instantly when gas is fully combusted. Compared with an electric water heater, the electric water heater has high heat exchange efficiency and low cost, and is instant to heat when being used, so that the electric water heater is popular with users. Thermal load gear breaking:
for a constant temperature water heater, the capacity of the constant temperature water heater for controlling the water temperature is equivalent to the capacity of the constant temperature water heater for adjusting the firepower (namely adjusting the heat load). When the constant-temperature gas water heater is used for adjusting firepower (namely adjusting heat load), the heat load can be linearly adjusted to ensure that the constant temperature can be kept at each set temperature point. The thermal load is disconnected, namely that the thermal load is lost in a certain range, and the constant temperature cannot be maintained when the temperature set by the user is in the lost thermal load range.
Further exemplifying: A16L constant-temperature gas water heater with the rated 30kW has 6 rows of fire in a burner, and the heat load range corresponding to each gear is as follows:
the data are only used as an example for explanation, the model difference can cause the actual data difference to be large, the data in the table can show that when the current pressure is 1000pa, 7-8 kW is lost, namely, the current pressure is a gear-off interval of the heat load, and after the water outlet temperature is set by a user, when the required firepower (namely, the heat load) is just in the gear-off interval, if the water temperature is required, the water temperature cannot be constant, the phenomenon that the sectional valve is frequently switched can be caused, and the water temperature can be suddenly cooled and suddenly heated. If the user sets the hot water temperature, the calculated needed firepower, namely the heat load is 7.5kW, at the moment, the burner sectional valves of the gas water heater are all closed, namely the heat load is insufficient (the maximum is 7 < 7.5(kW)) when 2 rows of fire work is carried out; when a sectional valve, namely 4 rows of fire works, is opened, the heat load is too large (the minimum is 8 to 7.5(kW)), the temperature cannot be kept constant, and the sectional valve is frequently switched to be closed completely → opened 1 to be closed completely, so that the water temperature is suddenly cooled and suddenly heated.
The technical problem to be solved by the embodiment of the invention is that the normal use of a user is influenced due to the fact that the water temperature fluctuates greatly when the sectional valve is frequently switched and the water temperature fluctuates suddenly and does not keep constant, so that the control method and the control device of the gas water heater are provided.
Example 1
As shown in fig. 1 and 2, the present invention provides a control method of a gas water heater, the gas water heater is provided with a gas segment valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, the control method comprises:
s1, acquiring the working state of the gas sectional valve and the current heat load required by the gas water heater;
specifically, in the embodiment of the present invention, the calculation principle of the current required heat load of the gas water heater is as follows: qHeating of＝k·CWater (W)·(TSetting up-TInflow water)·qWater flow rateWherein Q isHeating ofFor the current required heat load, k is the correction factor, CWater (W)Is the specific heat capacity of water, TSetting upSetting the temperature of the gas water heater, wherein the set temperature is set on the gas water heater by a user; t isInflow waterIs the inlet water temperature of the gas water heater, qWater flow rateThe water inlet flow of the gas water heater. Therefore, the current required heat load of the gas water heater can be obtained according to the actual working condition of the gas water heater.
The gas sectional valve can be provided with a monitoring device for monitoring the working state of the gas sectional valve, so that the working state of the gas sectional valve can be acquired in real time.
S2, judging whether the fuel gas sectional valve is in a frequent switching state or not;
in the embodiment of the invention, whether the gas sectional valve is in a frequent switching state or not needs to be judged according to the working state of the gas sectional valve. In the user's in-service use process, when the gas front pressure was low (being less than 1000pa), its coincidence district can reduce, even the thermal load breaks the shelves and does not have the coincidence district, and the water heater combustor takes place the segmentation and switches this moment, because of the thermal load breaks the shelves, can lead to the combustor segmentation valve to switch round and round for the gas segmentation valve is in frequent switching state.
And S3, when the gas sectional valve is in a frequent switching state, adjusting the water proportional valve according to the current heat load required by the gas water heater.
When the gas section valve is in a frequent switching state, the water proportional valve can be correspondingly adjusted according to the preset relation between the current heat load required by the gas water heater and the water proportional valve, and when the water proportional valve is adjusted, the inflow of the gas water heater can be correspondingly adjusted, so that the current heat load required is enabled to avoid a heat load gear-breaking interval.
So set up, gas heater's current demand heat load can remain linear variation throughout to can avoid gas sectional valve to frequently switch, keep out water temperature stable.
Further, in the embodiment of the present invention, the step S3 includes:
s31, when the gas sectional valve is in a frequent switching state, judging whether the current required heat load of the gas water heater exceeds a preset heat load;
specifically, when the gas segment valve is in a frequent switching state, the current required heat load of the gas water heater needs to be compared with the preset heat load. In an embodiment of the invention, the preset thermal load may be between 26.5KW and 27.5 KW.
Of course, the present embodiment is only to illustrate the value of the preset thermal load, but the present embodiment is not limited to this, and a person skilled in the art may change the value of the preset thermal load according to an actual situation, and the same technical effect may be achieved.
And S32, if so, controlling the water proportional valve to reduce the water inflow to the first water inflow.
When the current required heat load of the gas water heater exceeds the preset heat load, the water proportional valve is controlled to reduce the current water flow to the first water inflow, and a heat load gear-breaking interval is avoided, so that the switching back and forth of the segment valve is avoided, and the stable water outlet temperature is ensured.
In the embodiment of the invention, the normal water inflow is QDesign ofTo indicate that the first water inflow is between 0.85 and 0.95 times of the normal water inflow. Of course, the embodiment is only to exemplify the value of the first water inflow, but the value is not limited to this, and a person skilled in the art can change the first water inflow according to actual conditions, so that the same technical effect can be achieved.
Optionally, the control method further includes:
s33, if not, controlling the water proportional valve to increase the water inlet flow to a second water inlet, wherein the first water inlet is smaller than the second water inlet.
When the current required heat load of the gas water heater does not exceed the preset heat load, the water proportional valve is controlled to increase the current water flow to the second water inflow, and a heat load gear-breaking interval is avoided, so that the switching back and forth of the segment valve is avoided, and the stable water outlet temperature is ensured.
In the embodiment of the invention, the second water inflow is 1.05 times to 1.15 times of the normal water inflow. Of course, the embodiment is only to exemplify the value of the second water inflow, but the value is not limited to this, and a person skilled in the art can change the second water inflow according to actual conditions, so that the same technical effect can be achieved.
Optionally, the step S2 further includes:
s21, obtaining working parameters of the gas sectional valve;
s22, judging whether the working parameters are in an abnormal state or not;
and S23, when the working parameters are in an abnormal state, adjusting the water proportional valve according to the current heat load required by the gas water heater.
In the embodiment of the invention, whether the gas section valve is in a normal working state or an abnormal working state at present can be checked by acquiring the working parameters of the gas section valve. The operating parameter may be a current switching frequency of the gas segment valve. Wherein, the judging whether the working parameter is in an abnormal state can be realized by the following steps:
firstly, judging whether the current switching frequency exceeds a preset switching frequency, and when the current switching frequency exceeds the preset switching frequency, the current switching frequency is in an abnormal state.
Of course, the present embodiment is only to illustrate the operating parameters of the gas segment valve, but the present embodiment is not limited to this, and a person skilled in the art may change the operating parameters of the gas segment valve according to the actual situation, for example, the operating parameters may also be determined by detecting the fluctuation frequency of the water temperature or the gear-off range of the current required heat load, and the same technical effect may be achieved.
Example 2
According to a second aspect, an embodiment of the present invention further provides a control device for a gas water heater, the gas water heater is provided with a gas segment valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, the control device includes:
the acquisition module is used for acquiring the working state of the gas sectional valve and the current heat load required by the gas water heater; for details, please refer to step S1 of the above embodiment, which is not described herein again.
The processing module is used for judging whether the gas sectional valve is in a frequent switching state or not; (ii) a For details, please refer to step S2 of the above embodiment, which is not described herein again.
And the adjusting module is used for adjusting the water proportional valve according to the current heat load required by the gas water heater when the gas sectional valve is in a frequent switching state. For details, please refer to step S3 of the above embodiment, which is not described herein again.
So set up, when the gas segmentation valve is in frequently switching state, adjust the discharge of water proportional valve according to current demand heat load numerical value for gas heater avoids the heat load to break the shelves interval, and under this condition, the heat load can remain linear variation throughout, thereby can avoid the frequent switching of gas segmentation valve, keeps out water temperature stable.
Example 3
The embodiment of the invention also provides an electronic device, which may include a processor and a memory, wherein the processor and the memory may be connected by a bus or in other manners, taking bus connection as an example.
The processor may be a Central Processing Unit (CPU). The Processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or a combination thereof.
The memory, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules (e.g., a first acquisition module, a second acquisition module, a processing module, and a tuning module) corresponding to the control method in the embodiments of the present invention. The processor executes various functional applications and data processing of the processor by executing non-transitory software programs, instructions and modules stored in the memory, that is, the control method in the above method embodiment is realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor, and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and such remote memory may be coupled to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory and, when executed by the processor, perform any of the control methods of the above embodiments.
The specific details of the electronic device may be understood by referring to the corresponding related descriptions and effects in any of the above embodiments, and are not described herein again.
Example 4
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute any one of the control methods.
The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A control method of a gas water heater is characterized in that the gas water heater is provided with a gas subsection valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, and the control method comprises the following steps:
acquiring the working state of the gas sectional valve and the current required heat load of the gas water heater;
judging whether the gas sectional valve is in a frequent switching state or not;
and when the gas section valve is in a frequent switching state, the water proportional valve is adjusted according to the current heat load required by the gas water heater.
2. The control method of claim 1, wherein said adjusting the water proportioning valve according to the current required heat load of the gas water heater comprises:
judging whether the current required heat load of the gas water heater exceeds a preset heat load or not;
and if so, controlling the water proportional valve to reduce the water inlet flow to the first water inlet flow.
3. The control method according to claim 2, characterized by further comprising:
if not, controlling the water proportional valve to increase the water inlet flow to a second water inlet quantity, wherein the first water inlet quantity is smaller than the second water inlet quantity.
4. The control method according to any one of claims 1 to 3, wherein the determining whether the gas segment valve is in a frequent switching state includes:
acquiring working parameters of the gas sectional valve;
judging whether the working parameters are in an abnormal state or not;
and when the working parameters are in an abnormal state, judging whether the gas sectional valve is in a frequent switching state.
5. The control method according to claim 4, characterized in that the operating parameter is the current switching frequency of the gas segment valve; wherein, the judging whether the working parameters are in an abnormal state comprises:
judging whether the current switching frequency exceeds a preset switching frequency or not;
and when the current switching frequency exceeds the preset switching frequency, the current switching frequency is in an abnormal state.
6. A control method according to claim 2 or 3, characterized in that the preset heat load is between 26.5KW and 27.5 KW.
7. The control method of claim 3, wherein the first water intake is between 0.85 and 0.95 times the normal water intake; the second water inflow is 1.05 times to 1.15 times of the normal water inflow.
8. A control device of a gas water heater is characterized in that the gas water heater is provided with a gas subsection valve and a water inlet pipe, the water inlet pipe is provided with a water proportional valve, and the control method comprises the following steps:
the acquisition module is used for acquiring the working state of the gas sectional valve and the current heat load required by the gas water heater;
the processing module is used for judging whether the gas sectional valve is in a frequent switching state or not;
and the adjusting module is used for adjusting the water proportional valve according to the current heat load required by the gas water heater when the gas sectional valve is in a frequent switching state.
9. An electronic device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the control method of any one of claims 1 to 7.
10. A computer-readable storage medium storing computer instructions for causing a computer to execute the control method according to any one of claims 1 to 7.
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| CN202111478298.3A CN114136010A (en) | 2021-12-06 | 2021-12-06 | Control method and control device of gas water heater |
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| CN202111478298.3A CN114136010A (en) | 2021-12-06 | 2021-12-06 | Control method and control device of gas water heater |
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| CN114791174A (en) * | 2022-04-29 | 2022-07-26 | 中山百得厨卫有限公司 | Water temperature control method and device, water heater and storage medium |
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Application publication date: 20220304 |