CN111795505A - Preheating control method for gas water heater - Google Patents
Preheating control method for gas water heater Download PDFInfo
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- CN111795505A CN111795505A CN202010483770.1A CN202010483770A CN111795505A CN 111795505 A CN111795505 A CN 111795505A CN 202010483770 A CN202010483770 A CN 202010483770A CN 111795505 A CN111795505 A CN 111795505A
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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 preheating control method of a gas water heater, which comprises the following steps: acquiring the water consumption appointment time; acquiring the time t required by preheating; and executing a circulating preheating control step from the water use reserving time advance time t. The gas heater of this embodiment preheats control method, the user can reserve the water consumption time, the water heater is long according to preheating needs, start in advance and preheat for it is used for reserving the water consumption time just to make the reservation when accomplishing, because preheating water mainly stops in the pipeline, does not have the heat preservation measure heat to run off easily, can not lead to the temperature to run off because of preheating in advance, extravagant electric energy can not be later than the user reservation water consumption time again, lead to the user to wait, provide convenient to use for the user when energy-conserving.
Description
Technical Field
The invention belongs to the technical field of water heating equipment, and particularly relates to a preheating control method of a gas water heater.
Background
The gas water heater is an instant heating type water heater, but the water remained in a pipeline from a heating end to a water using end is cold water, so that the gas water heater cannot be opened to output hot water. Therefore, at present, a circulating water pump is arranged in the gas water heater, when the zero-cold-water function of the gas water heater is started, the circulating water pump starts to work, cold water in the installation water pipe is circularly pumped to the burner to be heated until the temperature reaches a set temperature, and hot water flows out when the water using end is opened.
Because the gas water heater only needs to preheat water in a circulating pipeline, the conventional general gas water heater does not have a water reservation function, and a user starts zero cold water circulation preheating when using the gas water heater. The heating from the low temperature of the entering water to the temperature of the circulation completion set by the user has the same problem of long heating time when the temperature difference between the initial temperature and the set temperature is large. At present, in order to complete the circular preheating as soon as possible, the gas water heater adopts the heavy-load combustion during the circular heating, the rotating speed of a water pump and a fan is higher, and the combustion noise is larger. The user can endure the noise during the process while waiting for the water heater to finish preheating for a long time.
At present, the gas water heater can only carry out circulating preheating according to a set value, and the output water temperature is fixed. However, the user sometimes does not need to preheat the water in the circulation line to a higher temperature, resulting in unnecessary waste.
Disclosure of Invention
The invention provides a preheating control method of a gas water heater, aiming at the problem that a user needs to wait for circulating preheating for a long time when using water because the existing gas water heater does not have an appointment function, and the problem can be solved.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
a preheating control method of a gas water heater comprises the following steps:
acquiring the water consumption appointment time;
acquiring the time t required by preheating;
and executing a circulating preheating control step from the water use reserving time advance time t.
Further, acquiring the water temperature T;
the circulating preheating control step includes:
a primary circulating preheating step, namely controlling the inlet water to be heated to a first temperature T1;
judging whether to execute a secondary circulating preheating step or not according to the water temperature T;
the secondary circulating preheating step controls the heating of the feed water to a second temperature T2, wherein T1 < T2.
Further, the method for judging whether to execute the secondary circulation preheating step comprises the following steps:
when T is less than T2, the secondary circulation preheating step is not executed;
and when T is more than or equal to T2, executing a secondary circulation preheating step.
Further, the primary circulating preheating step comprises:
and detecting the water inlet temperature, starting the circulating pump when the water inlet temperature is less than T1, detecting the water flow, igniting the gas water heater when the water flow meets the ignition condition, and otherwise, not igniting the gas water heater.
Furthermore, in the first-stage circulating preheating step, the rotating speed of the circulating pump is lower than the maximum rotating speed of the circulating pump, and the combustion load of the gas water heater is lower than the maximum combustion load of the gas water heater.
Further, the secondary circulating preheating step comprises the following steps:
and detecting the water inlet temperature, starting the circulating pump when the water inlet temperature is less than T2, detecting the water flow, igniting the gas water heater when the water flow meets the ignition condition, and otherwise, not igniting the gas water heater.
Furthermore, in the secondary circulation preheating step, the rotating speed of the circulating pump is equal to the maximum rotating speed of the circulating pump, and the combustion load of the gas water heater is lower than the maximum combustion load of the gas water heater.
Further, when T < T2, the preheating time period T = T1;
when T is larger than or equal to T2, the preheating time length T = T1+ T2;
the primary circulating preheating step also comprises recording the time length required for heating the inlet water to the first temperature T1, updating and storing the time length to T1, and the secondary circulating preheating step also comprises recording the time length required for heating the inlet water to the second temperature T1, updating and storing the time length to T2.
Further, in the circulating preheating control step, when the ignition time of the gas water heater is greater than a set threshold value, the combustion is stopped, and the circulating pump continues to work and stops after the time t3 is met.
Further, after the circulation pump stops working and meets the time t4, the circulation preheating control step is returned.
Compared with the prior art, the invention has the advantages and positive effects that: the gas heater of this embodiment preheats control method, the user can reserve the water consumption time, the water heater is long according to preheating needs, start in advance and preheat for it is used for reserving the water consumption time just to make the reservation when accomplishing, because preheating water mainly stops in the pipeline, does not have the heat preservation measure heat to run off easily, can not lead to the temperature to run off because of preheating in advance, extravagant electric energy can not be later than the user reservation water consumption time again, lead to the user to wait, provide convenient to use for the user when energy-conserving.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of an embodiment of a preheating control method for a gas water heater according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
The gas water heater includes a combustion chamber that utilizes the heat generated by the combustion of the gas to heat the cold water flowing therethrough, and thus, is instantaneous hot water to the water outlet end of the burner. Because the water using end and the water outlet end of the burner are connected by a longer pipeline, cold water stored in the pipeline between the water outlet end of the burner and the water using end cannot be used immediately. If the temperature difference between the inlet water and the outlet water of the burner is large, or the distance between the water using end and the water outlet end of the burner is too long, a user still needs to wait for a long time, and in order to quickly finish the cyclic preheating process, the burner adopts heavy-load combustion, so that the combustion noise is large.
Because the amount of water to be preheated by the gas water heater is much less than that of a water storage type water heater, few gas water heaters have the function of reserving water at present. And the gas heater does not have the physical heat preservation function, and the preheated water can be cooled down very soon if not used in time, resulting in energy waste. The gas water heater with the function of reserving water can be known from the known public information, and is limited to the setting of a reservation time period and a preset temperature by a user, namely, the user sets one or more time periods, hot water can be used in the time period, the gas water heater is preheated, the preheating is not carried out beyond the time period, and when the user uses the hot water in the time period, the preheating cycle is not completed, the user cannot be determined, and the user still cannot avoid waiting for the water.
Example one
The embodiment proposes a preheating control method for a gas water heater, as shown in fig. 1, including:
acquiring the water consumption appointment time; in this embodiment, the user can set a specific water consumption time point before which the water heater will finish preheating.
Acquiring the time t required by preheating;
and executing the circulating preheating control step from the water use reserving time advancing time t. When the water consumption time is reserved, the circulation preheating is completed, a user does not need to wait, and the instant hot water supply is really realized.
When a user sets reserved water, the water temperature needs to be set, if the user does not set the water temperature, a default value is provided in the system, and the preheating control method of the gas water heater further comprises the step of obtaining the water temperature T;
the circulating preheating control step comprises the following steps:
a primary circulating preheating step, namely controlling the inlet water to be heated to a first temperature T1;
judging whether to execute a secondary circulating preheating step or not according to the water temperature T;
the secondary circulating preheating step controls the heating of the feed water to a second temperature T2, wherein T1 < T2.
Through setting up the two-stage circulation in this scheme, the one-level circulation that at first carries out preheats for the low temperature circulation and preheats, at first heats into the warm water with the cold water in the pipeline, satisfies the demand with the family and uses the warm water, opens the water end and can enjoy the warm water. And determining whether to carry out secondary circulation preheating according to the water temperature T. In the primary circulation preheating step, the difference between the set first temperature T1 and the inlet water temperature is not particularly large, so that the primary circulation can heat the water in the pipeline to a certain temperature in advance through low-load heating, and preparation is made for quickly completing preheating in the subsequent secondary circulation.
The method for judging whether to execute the secondary circulation preheating step in the embodiment comprises the following steps:
when T is less than T2, the secondary circulation preheating step is not executed; that is, the water temperature T does not reach the second temperature T2, and the user's water demand is warm water, and thus, there is no need to perform the secondary circulation preheating. The water temperature T can be greater than the first temperature T1, also can be less than first temperature T1, and the difference in temperature between them is not too big, therefore, adopt one-level circulation to preheat the heated temperature can, when practicing thrift the energy consumption, need not the user and wait for, and can not reduce user experience. When the user continuously uses water, the gas water heater is ignited to heat the supplemented cold water, so that the user can continuously use the water at the set water temperature.
The method for judging whether to execute the secondary circulation preheating step can also comprise the step that a user enters through the operation of a water heater machine or an APP.
When T is more than or equal to T2, namely the user needs high-temperature water to meet the bathing requirement, a secondary circulating preheating step needs to be executed.
This scheme preheats through carrying out the two-stage circulation, selects to carry out one-level circulation heating to the warm water or continues to carry out second grade circulation heating to hot water according to user's actual demand, neither causes the energy waste, moreover because the one-level circulation has nearly reached certain degree with water heating, can accomplish final preheating fast when carrying out second grade circulation heating.
As a preferred embodiment, the primary cyclic preheating step in this embodiment includes:
and detecting the water inlet temperature, starting the circulating pump when the water inlet temperature is less than T1, detecting the water flow, igniting the gas water heater when the water flow meets the ignition condition, and otherwise, not igniting the gas water heater. The gas water heater judges whether the circulating water pump reaches a starting condition according to the water inlet temperature, the set temperature, the water flow and the like, and the circulating pump stops after running for a period of time if the circulating water pump does not reach the starting condition; and entering zero cold water primary circulation preheating after reaching the combustion starting condition.
Because the target temperature of the first-stage circulating preheating step is T1 low-temperature water, the first-stage circulating preheating step does not need to start large-load heating, the requirement that the combustion load of the gas water heater is lower than the maximum combustion load is met, the rotating speed of the circulating pump is correspondingly lower than the maximum rotating speed, the water is fully heated when flowing through the combustion chamber at low speed, and the circulating water can be uniformly heated to T1.
The speed of the circulation pump can be adjusted to 50% to 90% of its maximum speed, preferably 80% of its maximum speed.
The application scene of the warm water requirement with the temperature of T1 is common in the family life, for example, the requirements of washing, washing out and the like when the air temperature is lower, and in addition, the requirements of bathing when the air temperature is higher are not particularly high, and the primary circulation of the embodiment can be realized. The preheating time is shortened while energy is saved.
And judging whether a combustion stopping condition is reached or not according to the difference value of the inlet water temperature and the temperature T1 monitored in real time during primary circulation preheating, wherein the difference value can be adjusted, and after the condition that the secondary circulation is stopped is reached, the water pump is stopped after continuously running for a period of time.
Preferably, in this embodiment, the secondary circulation preheating step includes:
and detecting the water inlet temperature, starting the circulating pump when the water inlet temperature is less than T2, detecting the water flow, igniting the gas water heater when the water flow meets the ignition condition, and otherwise, not igniting the gas water heater.
In the secondary circulation preheating step, the rotating speed of the circulating pump is equal to the maximum rotating speed of the circulating pump, and the combustion load of the gas water heater is lower than the maximum combustion load of the gas water heater.
Because the secondary circulation preheating is executed after the primary circulation preheating, the primary circulation heats the water to a certain degree, therefore, the circulating pump can be started to run at the maximum rotating speed, the warm water can be rapidly heated when flowing through the combustion chamber, the combustion load of the gas water heater is still lower than the maximum combustion load, and finally the final preheating can be rapidly finished.
No matter in this embodiment be one-level circulation preheating or second grade circulation preheating, the combustion load of gas heater all need not open maximum combustion load, therefore the combustion noise is little.
The preheating time t can be an empirical set value, or can be updated according to the time of preheating in each cycle.
When T is less than T2, the preheating time length T = T1;
when T is larger than or equal to T2, the preheating time length T = T1+ T2;
the primary circulating preheating step also comprises recording the time length required for heating the inlet water to the first temperature T1, updating and storing the time length to T1, and the secondary circulating preheating step also comprises recording the time length required for heating the inlet water to the second temperature T1, updating and storing the time length to T2.
Because it is directly relevant with the temperature of intaking to preheat required duration, and the temperature of intaking is relevant with temperature, through timing and update the save with the time that the circulation was used each time, adjacent two preheat the circulation time interval and can not be too for a long time, consequently the temperature of intaking is close, therefore the required duration of reservation also is close for preheat the opening time when can more accurate control reservation water. Energy waste caused by premature completion of preheating is avoided while user waiting is avoided.
In order to prevent continuous heating caused by the failure of the detection temperature sensor and the like, in the circulating preheating control step, when the ignition time of the gas water heater is greater than a set threshold value, combustion is stopped, and the circulating pump continues to work and stops after the time t3 is met.
And in the circulating preheating control step, when the water end water flow is detected, the preheating circulation should be stopped, the circulating pump is correspondingly closed, and the water is supplied to the water end for output.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A preheating control method for a gas water heater is characterized by comprising the following steps:
acquiring the water consumption appointment time;
acquiring the time t required by preheating;
and executing a circulating preheating control step from the water use reserving time advance time t.
2. The preheat control method for a gas water heater of claim,
further comprising obtaining a water usage temperature T;
the circulating preheating control step includes:
a primary circulating preheating step, namely controlling the inlet water to be heated to a first temperature T1;
judging whether to execute a secondary circulating preheating step or not according to the water temperature T;
the secondary circulating preheating step controls the heating of the feed water to a second temperature T2, wherein T1 < T2.
3. The preheating control method of a gas water heater as claimed in claim 2, wherein the judging method of whether the secondary circulating preheating step is executed is as follows:
when T is less than T2, the secondary circulation preheating step is not executed;
and when T is more than or equal to T2, executing a secondary circulation preheating step.
4. The preheating control method of the gas water heater according to claim 2, wherein the primary circulating preheating step comprises:
and detecting the water inlet temperature, starting the circulating pump when the water inlet temperature is less than T1, detecting the water flow, igniting the gas water heater when the water flow meets the ignition condition, and otherwise, not igniting the gas water heater.
5. The preheating control method of the gas water heater as claimed in claim 4, wherein in the primary circulating preheating step, the rotating speed of the circulating pump is lower than the maximum rotating speed thereof, and the combustion load of the gas water heater is lower than the maximum combustion load thereof.
6. The preheating control method of the gas water heater as claimed in claim 2, wherein the secondary circulating preheating step comprises:
and detecting the water inlet temperature, starting the circulating pump when the water inlet temperature is less than T2, detecting the water flow, igniting the gas water heater when the water flow meets the ignition condition, and otherwise, not igniting the gas water heater.
7. The preheating control method of the gas water heater as claimed in claim 6, wherein in the secondary circulating preheating step, the rotating speed of the circulating pump is equal to the maximum rotating speed thereof, and the combustion load of the gas water heater is lower than the maximum combustion load thereof.
8. The preheating control method of a gas water heater according to any one of claims 2 to 7,
when T is less than T2, the preheating time length T = T1;
when T is larger than or equal to T2, the preheating time length T = T1+ T2;
the primary circulating preheating step also comprises recording the time length required for heating the inlet water to the first temperature T1, updating and storing the time length to T1, and the secondary circulating preheating step also comprises recording the time length required for heating the inlet water to the second temperature T1, updating and storing the time length to T2.
9. The preheating control method of the gas water heater as claimed in any one of claims 1 to 7, wherein in the circulating preheating control step, when the ignition time of the gas water heater is greater than a set threshold value, the combustion is stopped, and the circulating pump continues to operate and stops after the time t3 is met.
10. The preheating control method of the gas water heater according to claim 9, wherein the circulating pump returns to the circulating preheating control step after stopping working for a time t 4.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112594772A (en) * | 2020-11-17 | 2021-04-02 | 华帝股份有限公司 | Wall-mounted boiler zero-cold-water starting method |
| CN113357822A (en) * | 2021-06-04 | 2021-09-07 | 海信(广东)厨卫系统股份有限公司 | Control method and control device of water heater |
| CN113834218A (en) * | 2021-09-26 | 2021-12-24 | 华帝股份有限公司 | Preheating control method of gas water heater and gas water heater |
| CN113945003A (en) * | 2021-09-15 | 2022-01-18 | 威能(无锡)供热设备有限公司 | Gas water heating equipment, preheating control method thereof, water heating system and readable storage medium |
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| CN113945003A (en) * | 2021-09-15 | 2022-01-18 | 威能(无锡)供热设备有限公司 | Gas water heating equipment, preheating control method thereof, water heating system and readable storage medium |
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