CN112443983A - Circulation control method and system of water heater - Google Patents
Circulation control method and system of water heater Download PDFInfo
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- CN112443983A CN112443983A CN202011342670.3A CN202011342670A CN112443983A CN 112443983 A CN112443983 A CN 112443983A CN 202011342670 A CN202011342670 A CN 202011342670A CN 112443983 A CN112443983 A CN 112443983A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
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- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The invention discloses a circulation control method and a circulation control system of a water heater, wherein the circulation control method comprises the following steps: s11, detecting whether the water inlet flow of the water inlet end of the water heater is smaller than a first flow threshold value, if so, executing a step S12; s12, judging whether the water outlet temperature of the water outlet end of the water heater is smaller than a first temperature threshold value, if so, executing a step S13; s13, starting a circulating water pump, detecting whether the circulating flow in a circulating pipeline of the water heater is smaller than a second flow threshold value, and if so, executing a step S14; the second flow threshold is greater than the first flow threshold; s14, starting circulating pressurization of water in the circulating pipeline; s15, detecting whether the circulation flow is larger than a third flow threshold value, if so, executing a step S16; and S16, starting circulation heating of the water in the circulation pipeline. This application can be accurate control circulation open and stop, circulation pressure boost, circulation heating function such as, solved the circulation and frequently opened and stop, circulation heating shortcoming such as slow.
Description
Technical Field
The invention belongs to the field of control of gas water heaters, and particularly relates to a circulation control method and system of a water heater.
Background
At present, a plurality of machines in gas water heater products are circulating machines, the aim of circulating heating is achieved by a set of accurate control mode, otherwise, the defects of slow circulating heating, no circulation, high air consumption, high noise, frequent circulation opening and the like directly influence the use of customers.
Disclosure of Invention
The invention aims to overcome the defects of frequent start and stop of a water heater by gas circulation, slow circulation heating, no circulation, high gas consumption, high noise and the like in the prior art, and provides a circulation control method and a system of the water heater.
The invention solves the technical problems through the following technical scheme:
a cycle control method of a water heater, the cycle control method comprising:
s11, detecting whether the water inlet flow of the water inlet end of the water heater is smaller than a first flow threshold value, if so, executing a step S12;
s12, judging whether the water outlet temperature of the water outlet end of the water heater is smaller than a first temperature threshold value, if so, executing a step S13;
s13, starting a circulating water pump, detecting whether the circulating flow in a circulating pipeline of the water heater is smaller than a second flow threshold value, and if so, executing a step S14; the second flow threshold is greater than the first flow threshold;
s14, starting circulating pressurization of water in the circulating pipeline;
s15, detecting whether the circulation flow is larger than a third flow threshold value, if so, executing a step S16;
and S16, starting circulating heating of the water in the circulating pipeline.
Preferably, in step S13, if the determination result is no, step S16 is executed.
Preferably, after step S16, the loop control method further includes:
s21, counting whether the time of the cyclic heating is larger than a first time threshold value, if not, executing a step S22, and if so, executing a step S25;
s22, judging whether the outlet water temperature is larger than a second temperature threshold value, if so, executing a step S23, and if not, executing a step S24; the second temperature threshold is greater than the first temperature threshold;
s23, counting whether the time of the cyclic heating is larger than a second time threshold, if not, executing a step S24, and if so, executing a step S25; the second time threshold is less than the first time threshold;
s24, continuing to circularly heat, and then returning to the step S21;
and S25, stopping cyclic heating.
Preferably, in step S22, if the determination result is negative, step S221 is executed first, which specifically includes:
s221, judging whether the outlet water temperature is smaller than a third temperature threshold, if not, executing step S24, and if so, executing step S222; the third temperature threshold is less than the second temperature threshold;
s222, judging whether the water return temperature of the water inlet end is greater than a fourth temperature threshold, if so, executing a step S23, and if not, executing a step S24; the fourth temperature threshold is less than the second temperature threshold.
Preferably, in step S12, if the determination result is yes, the loop control method further includes:
s121, judging whether the water return temperature of the water inlet end is larger than a fourth temperature threshold, if not, executing a step S13, and if so, executing a step S16.
Preferably, before step S11, the loop control method further includes:
s10, entering the circulation control of the water heater, setting a circulation temperature threshold, and setting the first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold according to the circulation temperature threshold;
and/or after the step S25, the loop control method further includes:
s26, counting whether the time of the circulation control of the water heater reaches a third time threshold, if not, returning to the step S11, and if so, executing the step S27;
and S27, stopping the circulation control of the water heater.
A circulation control system of a water heater comprises a first detection module, a first judgment module, a second detection module, a circulation pressurization module, a third detection module and a circulation heating module;
the first detection module is used for detecting whether the inflow of the water inlet end of the water heater is smaller than a first flow threshold value, and if so, the first judgment module is called;
the first judging module is used for judging whether the water outlet temperature of the water outlet end of the water heater is smaller than a first temperature threshold value, and if so, the second detecting module is called;
the second detection module is used for detecting whether the circulation flow in the circulation pipeline of the water heater is smaller than a second flow threshold value after the circulation water pump is started, and if so, the circulation pressurization module is called; the second flow threshold is greater than the first flow threshold;
the circulating pressurization module is used for starting circulating pressurization of water in the circulating pipeline;
the third detection module is further configured to detect whether the circulation flow is greater than a third flow threshold, and if so, invoke the circulation heating module;
the circulating heating module is used for starting circulating heating of water in the circulating pipeline.
Preferably, the second detection module is further configured to invoke the circulation heating module when the circulation flow rate is not less than a second flow rate threshold.
Preferably, the circulation control system further comprises a first statistical module, a second judgment module and a second statistical module;
the first statistical module is used for counting whether the time of the cyclic heating is greater than a first time threshold value, if not, the second judgment module is called, and if yes, the cyclic heating module is called to stop the cyclic heating;
the second judging module is used for judging whether the outlet water temperature is greater than a second temperature threshold value, if so, the second statistical module is called, and if not, the circulating heating module is called to continue circulating heating and the first statistical module is called; the second temperature threshold is greater than the first temperature threshold;
the second statistical module is used for counting whether the time of the cyclic heating is greater than a second time threshold value or not, if not, the cyclic heating module is called to continue the cyclic heating, the first statistical module is called, and if yes, the cyclic heating module is called to stop the cyclic heating; the second time threshold is less than the first time threshold.
Preferably, the circulation control system further comprises a third judgment module and a fourth judgment module;
if the judgment result of the second judgment module is negative, the third judgment module is called first;
the third judging module is used for judging whether the outlet water temperature is smaller than a third temperature threshold value, if not, the circulating heating module is called again to continue circulating heating, the first counting module is called, and if yes, the fourth judging module is called; the third temperature threshold is less than the second temperature threshold;
the fourth judging module is used for judging whether the return water temperature of the water inlet end is greater than a fourth temperature threshold value, if so, the second counting module is called, and if not, the circulating heating module is called to continue circulating heating, and the first counting module is called; the fourth temperature threshold is less than the second temperature threshold.
Preferably, the circulation control system further comprises a fourth judgment module;
the first judging module is also used for calling the fourth judging module when the judging result is yes;
the fourth judging module is used for judging whether the return water temperature of the water inlet end is greater than a fourth temperature threshold value, if not, the second detecting module is called, and if so, the circulating heating module is called to perform circulating heating.
Preferably, the circulation control system further comprises a threshold setting module;
the threshold setting module is used for setting a cycle temperature threshold after entering the cycle control of the water heater, and setting the first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold according to the cycle temperature threshold;
and/or the circulation control system further comprises a third statistical module and a switch module;
the third counting module is used for counting whether the time of the cycle control of the water heater reaches a third time threshold value, if not, the first detection module is called, and if so, the switch module is called;
the switch module is used for stopping the circulation control of the water heater.
The positive progress effects of the invention are as follows: the application provides a zero cold water circulation logic of gas heater, and control that can be accurate circulates and opens and stop and circulation pressure boost function, has solved the circulation and has frequently opened and stop, and the circulation heating is slow, not circulate, the gas consumption is many, the noise is big etc. shortcoming, has also solved and has stopped the shortcoming of opening logical interact.
Drawings
Fig. 1 is a flowchart of a circulation control method of a water heater according to embodiment 1 of the present invention.
Fig. 2 is a flowchart of a circulation control method of a water heater according to embodiment 2 of the present invention.
Fig. 3 is a flowchart of a circulation control method of a water heater according to embodiment 3 of the present invention.
Fig. 4 is a flowchart of a circulation control system of a water heater according to embodiment 4 of the present invention.
Fig. 5 is a flowchart of a circulation control system of a water heater according to embodiment 5 of the present invention.
Fig. 6 is a flowchart of a circulation control system of a water heater according to embodiment 6 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
A circulation control method of a water heater, as shown in fig. 1, the circulation control method comprising:
And step 16, starting the circulation heating of the water in the circulation pipeline.
In this embodiment, through the settlement of circulation pressure boost, solved current pipeline length, pipe resistance big scheduling problem and caused unable start-up machine, the pressure boost is opened, makes discharge increase, and rate of heating is faster, solves because of the long unable influence of opening the circulation of pipeline. In addition, when the water flow is small but the opening condition is met, heat balance can be caused due to pipe loss, so that the water heater is in a heating state all the time and cannot be closed, and the problems can be solved after pressurization.
Example 2
The cycle control method of the embodiment is further improved on the basis of the embodiment 1, and a second temperature threshold value is also set according to the cycle temperature threshold value in the step 10;
as shown in fig. 2, after step 16, the loop control method further includes:
and step 25, stopping the circular heating.
and 27, stopping the circulation control of the water heater.
The embodiment provides a closing control implementation mode of circulation control, and the closing monitoring of the circulation control is further realized by detecting the water outlet temperature and the time of circulation heating and circulation control.
Example 3
The cycle control method of the present embodiment is further improved on the basis of embodiment 1, and in step 10, a third temperature threshold and a fourth temperature threshold are further set according to the cycle temperature threshold;
as shown in fig. 3, in step 22, if the determination result is negative, step 221 is executed first, and the method specifically includes:
In addition, before the circulation heating is started, if the fact that the return water temperature is greater than the fourth temperature threshold value is detected, in the follow-up closing control, only the outlet water temperature needs to be monitored.
In this embodiment, the opening condition of the circulation control is the water outlet temperature, and the closing condition is to judge the water return temperature and the water outlet temperature, so that the influence of too large difference in water temperature in the circulation pipeline can be solved. If the starting and stopping conditions are judged for the outlet water temperature, the outlet water temperature is far higher than the return water temperature after the water heater is heated, so that the water heater is easy to stop, but the return water temperature is possibly very low, namely the water temperature in the pipeline is very low, so that cold water in the pipeline is used by a user in the using process; or the starting and stopping conditions are all return water temperature judgment, and after the water heater is heated, the outlet water temperature is far higher than the return water temperature, so that the outlet water temperature is far higher than the set circulating temperature, and a user is scalded in the using process; by utilizing the circulation logic, the circulation speed can be increased, the temperature in the pipeline can be accurately controlled, and the comfort level of a user can be improved.
Example 4
A circulation control system of a water heater is shown in FIG. 4, and comprises a threshold setting module 1, a first detection module 201, a first judgment module 301, a second detection module 202, a circulation pressurization module 5, a third detection module 203 and a circulation heating module 6;
the threshold setting module 1 is used for setting a cycle temperature threshold T after entering the cycle control of the water heater, and setting the first temperature threshold T-C according to the cycle temperature threshold;
the first detection module 201 is configured to detect whether a water inflow rate of a water inlet end of the water heater is smaller than a first flow threshold value after the water circulation pump is started, and if so, invoke the first judgment module 301; if not, the circulation heating is not carried out. After the circulating water pump is started, the water pump is started with a set power and provides a certain water flow.
The first judging module 301 is configured to judge whether the water outlet temperature at the water outlet end of the water heater is lower than a first temperature threshold, and if so, invoke the second detecting module 202; if not, the circulation heating is not carried out.
The second detection module 202 is configured to detect whether a circulation flow in a circulation pipe of the water heater is smaller than a second flow threshold, and if so, invoke the circulation pressurization module 5; if not, the circulating heating module 6 is called. The second flow threshold is greater than the first flow threshold;
the circulating pressurization module 5 is used for starting circulating pressurization of water in the circulating pipeline;
the third detecting module 203 is further configured to detect whether the circulation flow is greater than a third flow threshold, and if so, invoke the circulation heating module 6; if not, calling the circulating pressurization module 5 to continue circulating pressurization until the circulating flow is larger than the third flow threshold, specifically, adjusting the work power of the circulating water pump, and if the circulating water pump operates at hundred percent power and the circulating flow cannot reach the third flow threshold, no circulating control of circulating heating is executed. Wherein the third flow threshold and the second flow threshold may be the same.
The circulating heating module 6 is used for starting circulating heating of water in the circulating pipeline.
In this embodiment, through the settlement of circulation pressure boost, solved current pipeline length, pipe resistance big scheduling problem and caused unable start-up machine, the pressure boost is opened, makes discharge increase, and rate of heating is faster, solves because of the long unable influence of opening the circulation of pipeline. In addition, when the water flow is small but the opening condition is met, heat balance can be caused due to pipe loss, so that the water heater is in a heating state all the time and cannot be closed, and the problems can be solved after pressurization.
Example 5
The cycle control system of this embodiment is further improved on the basis of embodiment 4, and the threshold setting module 1 is further configured to set a second temperature threshold T + C according to the cycle temperature threshold, where the value of C is set in consideration of the opening temperature return difference and is not frequently started.
As shown in fig. 5, the loop control system further includes a first statistical module 401, a second judgment module 302, a second statistical module 402, a third statistical module 403, and a switch module 7;
the first statistical module 401 is configured to count whether the time for the cyclic heating is greater than a first time threshold, if not, invoke the second determining module 302, and if so, invoke the cyclic heating module 6 to stop the cyclic heating;
the second judging module 302 is configured to judge whether the outlet water temperature is greater than a second temperature threshold, if so, invoke the second counting module 402, otherwise, invoke the cyclic heating module 6 to continue cyclic heating, and invoke the first counting module 401; the second temperature threshold is greater than the first temperature threshold;
the second counting module 402 is configured to count whether the time for the cyclic heating is greater than a second time threshold, if not, call the cyclic heating module 6 to continue the cyclic heating, and call the first counting module 401, and if so, call the cyclic heating module 6 to stop the cyclic heating; the second time threshold is less than the first time threshold.
The third counting module 403 is configured to count whether the time for the cycle control of the water heater reaches a third time threshold, if not, invoke the first detecting module 201, and if so, invoke the switch module 7;
the switch module 7 is used for stopping the circulation control of the water heater.
The embodiment provides a closing control implementation mode of circulation control, and the closing monitoring of the circulation control is further realized by detecting the water outlet temperature and the time of circulation heating and circulation control.
Example 6
The cycle control system of this embodiment is further improved based on embodiment 4, and the threshold setting module 1 is further configured to set a third temperature threshold T-C according to the cycle temperature threshold1And a fourth temperature threshold T-C2，C1The values are set taking into account the opening temperature having a return difference, not frequently started, and C2The value of (d) is a result calculated from the minimum load.
As shown in fig. 6, the loop control system further includes a third judging module 303 and a fourth judging module 304;
if the determination result of the second determining module 302 is negative, the third determining module 303 is called first;
the third judging module 303 is configured to judge whether the outlet water temperature is lower than a third temperature threshold, if not, invoke the circulating heating module 6 to continue circulating heating, and invoke the first counting module 401, and if so, invoke the fourth judging module 304; the third temperature threshold is less than the second temperature threshold;
the fourth judging module 304 is configured to judge whether the temperature of the return water at the water inlet end is greater than a fourth temperature threshold, if so, invoke the second counting module 402, otherwise, invoke the cyclic heating module 6 to continue cyclic heating, and invoke the first counting module 401; the fourth temperature threshold is less than the second temperature threshold.
In addition, before the circulation heating is started, if the fact that the return water temperature is greater than the fourth temperature threshold value is detected, in the follow-up closing control, only the outlet water temperature needs to be monitored.
In this embodiment, the opening condition of the circulation control is the water outlet temperature, and the closing condition is to judge the water return temperature and the water outlet temperature, so that the influence of too large difference in water temperature in the circulation pipeline can be solved. If the starting and stopping conditions are judged for the outlet water temperature, the outlet water temperature is far higher than the return water temperature after the water heater is heated, so that the water heater is easy to stop, but the return water temperature is possibly very low, namely the water temperature in the pipeline is very low, so that cold water in the pipeline is used by a user in the using process; or the starting and stopping conditions are all return water temperature judgment, and after the water heater is heated, the outlet water temperature is far higher than the return water temperature, so that the outlet water temperature is far higher than the set circulating temperature, and a user is scalded in the using process; by utilizing the circulation logic, the circulation speed can be increased, the temperature in the pipeline can be accurately controlled, and the comfort level of a user can be improved.
Example 7
A computer-readable storage medium on which a computer program is stored, which when executed by a processor, implements the steps of the circulation control method of a water heater according to any one of embodiments 1-3.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible implementation, the invention can also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps of implementing the circulation control method of a water heater according to any one of embodiments 1 to 3, when said program product is run on said terminal device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A circulation control method of a water heater, characterized by comprising:
s11, detecting whether the water inlet flow of the water inlet end of the water heater is smaller than a first flow threshold value, if so, executing a step S12;
s12, judging whether the water outlet temperature of the water outlet end of the water heater is smaller than a first temperature threshold value, if so, executing a step S13;
s13, starting a circulating water pump, detecting whether the circulating flow in a circulating pipeline of the water heater is smaller than a second flow threshold value, and if so, executing a step S14; the second flow threshold is greater than the first flow threshold;
s14, starting circulating pressurization of water in the circulating pipeline;
s15, detecting whether the circulation flow is larger than a third flow threshold value, if so, executing a step S16;
and S16, starting circulating heating of the water in the circulating pipeline.
2. The circulation control method for water heater according to claim 1, wherein in step S13, if the determination result is negative, step S16 is executed.
3. The circulation control method of a water heater according to claim 1, wherein after the step S16, the circulation control method further comprises:
s21, counting whether the time of the cyclic heating is larger than a first time threshold value, if not, executing a step S22, and if so, executing a step S25;
s22, judging whether the outlet water temperature is larger than a second temperature threshold value, if so, executing a step S23, and if not, executing a step S24; the second temperature threshold is greater than the first temperature threshold;
s23, counting whether the time of the cyclic heating is larger than a second time threshold, if not, executing a step S24, and if so, executing a step S25; the second time threshold is less than the first time threshold;
s24, continuing to circularly heat, and then returning to the step S21;
and S25, stopping cyclic heating.
4. The circulation control method of a water heater according to claim 3, wherein in step S22, if the determination result is negative, step S221 is executed first, and specifically includes:
s221, judging whether the outlet water temperature is smaller than a third temperature threshold, if not, executing step S24, and if so, executing step S222; the third temperature threshold is less than the second temperature threshold;
s222, judging whether the water return temperature of the water inlet end is greater than a fourth temperature threshold, if so, executing a step S23, and if not, executing a step S24; the fourth temperature threshold is less than the second temperature threshold.
5. The circulation control method of a water heater according to claim 4, wherein before the step S11, the circulation control method further comprises:
s10, entering the circulation control of the water heater, setting a circulation temperature threshold, and setting the first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold according to the circulation temperature threshold;
and/or after the step S25, the loop control method further includes:
s26, counting whether the time of the circulation control of the water heater reaches a third time threshold, if not, returning to the step S11, and if so, executing the step S27;
and S27, stopping the circulation control of the water heater.
6. The circulation control system of the water heater is characterized by comprising a first detection module, a first judgment module, a second detection module, a circulation pressurization module, a third detection module and a circulation heating module;
the first detection module is used for detecting whether the inflow of the water inlet end of the water heater is smaller than a first flow threshold value, and if so, the first judgment module is called;
the first judging module is used for judging whether the water outlet temperature of the water outlet end of the water heater is smaller than a first temperature threshold value, and if so, the second detecting module is called;
the second detection module is used for detecting whether the circulation flow in the circulation pipeline of the water heater is smaller than a second flow threshold value after the circulation water pump is started, and if so, the circulation pressurization module is called; the second flow threshold is greater than the first flow threshold;
the circulating pressurization module is used for starting circulating pressurization of water in the circulating pipeline;
the third detection module is further configured to detect whether the circulation flow is greater than a third flow threshold, and if so, invoke the circulation heating module;
the circulating heating module is used for starting circulating heating of water in the circulating pipeline.
7. The cycling control system for a water heater according to claim 6, wherein the second detection module is further configured to invoke the cycling heating module when the cycling flow rate is not less than a second flow rate threshold.
8. The circulation control system of a water heater according to claim 6, further comprising a first statistical module, a second judgment module and a second statistical module;
the first statistical module is used for counting whether the time of the cyclic heating is greater than a first time threshold value, if not, the second judgment module is called, and if yes, the cyclic heating module is called to stop the cyclic heating;
the second judging module is used for judging whether the outlet water temperature is greater than a second temperature threshold value, if so, the second statistical module is called, and if not, the circulating heating module is called to continue circulating heating and the first statistical module is called; the second temperature threshold is greater than the first temperature threshold;
the second statistical module is used for counting whether the time of the cyclic heating is greater than a second time threshold value or not, if not, the cyclic heating module is called to continue the cyclic heating, the first statistical module is called, and if yes, the cyclic heating module is called to stop the cyclic heating; the second time threshold is less than the first time threshold.
9. The circulation control system of a water heater according to claim 8, further comprising a third judging module and a fourth judging module;
if the judgment result of the second judgment module is negative, the third judgment module is called first;
the third judging module is used for judging whether the outlet water temperature is smaller than a third temperature threshold value, if not, the circulating heating module is called again to continue circulating heating, the first counting module is called, and if yes, the fourth judging module is called; the third temperature threshold is less than the second temperature threshold;
the fourth judging module is used for judging whether the return water temperature of the water inlet end is greater than a fourth temperature threshold value, if so, the second counting module is called, and if not, the circulating heating module is called to continue circulating heating, and the first counting module is called; the fourth temperature threshold is less than the second temperature threshold.
10. The cycling control system for a water heater according to claim 9, further comprising a threshold setting module;
the threshold setting module is used for setting a cycle temperature threshold after entering the cycle control of the water heater, and setting the first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold according to the cycle temperature threshold;
and/or the circulation control system further comprises a third statistical module and a switch module;
the third counting module is used for counting whether the time of the cycle control of the water heater reaches a third time threshold value, if not, the first detection module is called, and if so, the switch module is called;
the switch module is used for stopping the circulation control of the water heater.
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| TW201812229A (en) * | 2016-09-05 | 2018-04-01 | 台灣櫻花股份有限公司 | Pressurized water method of hot-water heater, and hot-water heater having the same |
| CN110966770A (en) * | 2018-09-30 | 2020-04-07 | 青岛经济技术开发区海尔热水器有限公司 | Control method of supercharged gas water heater and gas water heater |
| CN110411033A (en) * | 2019-07-19 | 2019-11-05 | 樱花卫厨（中国）股份有限公司 | Control method and control system for pressurization cycle formula gas heater |
| CN111912119A (en) * | 2020-08-10 | 2020-11-10 | 华帝股份有限公司 | Control method for pressurization function of gas water heater and gas water heater |
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