CN108679848B - Water flow property judgment method of hot water supply device and gas heating water heater - Google Patents
Water flow property judgment method of hot water supply device and gas heating water heater Download PDFInfo
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- CN108679848B CN108679848B CN201810170890.9A CN201810170890A CN108679848B CN 108679848 B CN108679848 B CN 108679848B CN 201810170890 A CN201810170890 A CN 201810170890A CN 108679848 B CN108679848 B CN 108679848B
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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
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Abstract
The invention discloses a water flow property judging method of a hot water supply device, which is characterized in that the method is used on a hot water device with a circulating preheating function, the water flow during circulating preheating is smaller than the water flow of water for a user through the selective setting of a circulating preheating water pump, and a main controller of the hot water device is used for setting a circulating preheating water flow threshold; in the circulating preheating process of the hot water device, if the water flow signal detected by the water flow sensor is greater than the circulating preheating water flow threshold value, the main controller of the hot water device judges that the water flow is used by a user, and at the moment, the circulating preheating water pump is controlled to stop running. The method for judging the water flow property can accurately distinguish the circulating preheating water from the valve opened by a user, provides a basis for starting and stopping the circulating preheating water pump, ensures the constant temperature effect of the hot water device with the circulating preheating function, prolongs the service life of the circulating preheating water pump, and saves electric energy and water. The invention also provides a gas heating water heater.
Description
Technical Field
The invention relates to the technical field of fluid heaters, in particular to a water flow property judgment method of a hot water supply device and a gas heating water heater.
Background
At present, when most zero-cold-water gas appliances work, a bathroom circulating water pump is controlled to operate, so that a water flow sensor outputs a water flow signal, and the water flow signal is used as one of judgment conditions for starting circulating preheating combustion. However, the user uses water to start combustion heating by detecting a water flow signal, and when the user opens a valve to use water during the preheating process, the water pressure fluctuation and the operation of the bathroom circulating water pump may cause the water flow fluctuation to be too large or exceed the maximum hot water supply flow, so that stable, uniform and comfortable hot water cannot be obtained.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a water flow property judgment method of a hot water supply device, which has a simple structure and is convenient to realize, so that the preheating starting water flow and the water flow for users can be judged and distinguished under the condition of not increasing the water path structure and the cost of the whole machine.
In order to achieve the purpose, the invention adopts the following technical scheme.
A water flow property judging method of a hot water supply device is characterized in that the method is used on a hot water device with a circulating preheating function, the water flow during circulating preheating is smaller than the water flow of water for users through the selective setting of a circulating preheating water pump, and a main controller of the hot water device is used for setting a circulating preheating water flow threshold; in the circulating preheating process of the hot water device, if the water flow signal detected by the water flow sensor is greater than the circulating preheating water flow threshold value, the main controller of the hot water device judges that the water flow is used by a user, and at the moment, the circulating preheating water pump is controlled to stop running.
As a further explanation of the above solution, in case that the circulation preheating starting condition is not satisfied, if the water flow sensor detects a water flow signal, the main controller of the hot water apparatus determines that the water flow is the water for the user, and at this time, controls the circulation preheating water pump not to operate.
As a further explanation of the above scheme, in the circulation preheating process of the hot water device, if the continuous operation time of the circulation preheating water pump exceeds the set time, the main controller of the hot water device determines that the water flow is the water for the user, and at this time, controls the circulation preheating water pump to stop operating.
As a further explanation of the above scheme, when the circulating preheating starting condition is satisfied, the water flow detected by the water flow sensor is less than or equal to the set value, and the continuous operation time of the circulating preheating water pump is less than or equal to the set time, the main controller of the water heating device determines that the water flow is the circulating preheating water, and at this time, the circulating preheating water pump is controlled to continue to operate.
As a further explanation of the above scheme, the value range of the circulating preheated water flow threshold is as follows: the water flow rate of the hot water device during circulating preheating is less than the circulating preheating water flow threshold value and less than 3a/4, wherein a represents the hot water production rate of the hot water device.
As a further illustration of the above scenario, the set time period is 30 minutes.
As a further explanation of the above scheme, the water heating device is a gas water heater or a gas heating water heater.
The invention also provides a gas heating water heater, which is characterized by comprising a main controller and a bathroom loop, wherein the bathroom loop is provided with a circulating preheating water pump, a water flow sensor, a bathing water inlet temperature probe and a bathing water outlet temperature probe which are connected with the main controller, and the controller controls the starting of the circulating preheating water pump and performs circulating preheating according to signals fed back by the bathing water inlet temperature probe and the bathing water outlet temperature probe; and the main controller stores a circulating preheating water flow threshold, and in the circulating preheating process, if the water flow signal detected by the water flow sensor is greater than the circulating preheating water flow threshold, the main controller judges that the water flow is used by the user, and at the moment, the circulating preheating water pump is controlled to stop running.
As a further explanation of the above scheme, when the temperature value of the bath water outlet temperature probe is less than or equal to the set bath water outlet target temperature-the set start temperature difference or the temperature value of the bath water inlet temperature probe is less than or equal to the set bath water outlet target temperature-the start temperature difference-2 ℃, the main controller controls the start of the circulating preheating water pump to perform circulating preheating.
As a further explanation of the above scheme, when the temperature value of the bath inlet water temperature probe is greater than or equal to the bath outlet water target temperature by-2 ℃ or the temperature value of the bath outlet water temperature probe is greater than or equal to the set bath outlet water target temperature by +10 ℃, the main controller controls the circulating preheating water pump to stop operating.
The invention has the beneficial effects that:
the method for judging the water flow property can accurately distinguish the circulating preheating water from the valve opened by a user, provides a basis for starting and stopping the circulating preheating water pump, ensures the constant temperature effect of the hot water device with the circulating preheating function, prolongs the service life of the circulating preheating water pump, and saves electric energy and water.
According to the gas heating water heater, under the condition that a waterway structure and detection equipment are not added, circulating preheating water and user water are judged and distinguished intelligently, the constant temperature effect of supplying hot water to the gas heating water heater is guaranteed, the service life of a bathroom circulating preheating water pump is prolonged, and electric energy is saved.
Drawings
Fig. 1 is a schematic structural view of a gas-fired heating water heater according to the present invention.
Fig. 2 is a flow chart showing the flow of the water flow of the gas heating water heater for determining the water flow of the bathroom hot water.
Detailed Description
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the feature, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the present invention, unless otherwise specified and limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.
The following describes the embodiments of the present invention with reference to the drawings of the specification, so that the technical solutions and the advantages thereof are more clear and clear. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.
Example 1
A method for judging the water flow nature of hot water supplying device features that the circulating preheating water pump is selectively set up to make the water flow rate in circulating preheating less than that of user's water, and a main controller of said water supplying device is used to set a threshold value for the flow rate of circulating preheating water.
The main controller of the water heating device judges whether the property of the current water flow signal belongs to user water or circulating preheating water according to the time point of the water flow signal and the water flow.
1) When the preheating starting condition is met, starting a circulating preheating water pump, and judging that the current circulating preheating is carried out when a water flow signal is detected; when the starting condition of the circulating preheating function is not met, the water flow signal is detected, the current water use is judged as the user water, and the circulating preheating water pump is not started before the secondary water flow signal disappears.
2) When the circulating preheating water pump is in circulating preheating, detecting that the current water flow is greater than a circulating preheating water flow threshold value, judging that the water is used by a user, and stopping the circulating preheating water pump;
3) when the preheating flameout condition is not met even if the circulating preheating exceeds 30min, the main controller judges that the user opens the valve to use water, and the main controller controls the circulating preheating water pump to immediately stop running.
Wherein, the hot water device is a gas water heater or a gas heating water heater.
The value range of the circulating preheating water flow threshold is as follows: the water flow rate of the hot water device during the circulating preheating is less than the circulating preheating water flow threshold value and less than 3a/4, wherein a represents the hot water production rate of the hot water device, namely the hot water output quantity of each minute when the hot water temperature rises to 30K +/-1K under the rated hot water heat input. By setting the circulating preheating water flow threshold value to be less than 3a/4, hot water with enough temperature rise can be obtained when the bathroom circulating water pump is controlled to run or stop running after a user opens a valve to use water so as to increase the water outlet flow. Since the target hot water temperature of a common appliance can be set to 60 ℃ at most, assuming that the hot water production rate of a hot water device is aL/min when the nominal hot water temperature rises to 30K, and the inlet water temperature is 20 ℃, the water flow rate of the temperature rise 40K is b-3 a/4.
The set time period is 30 minutes. A large number of experiments prove that under the normal preheating condition, the water in the hot water pipeline is heated to meet the preheating flameout condition, and the burning time is not more than 30 min. Therefore, when the preheating flameout condition is not met even if the circulating preheating exceeds 30min, the valve opening water is judged to be used by the user.
The method for judging the water flow property provided by the embodiment can accurately distinguish the circulating preheating water from a user opening valve, provides a basis for starting and stopping the circulating preheating water pump, ensures the constant temperature effect of the water heating device with the circulating preheating function, prolongs the service life of the circulating preheating water pump, and saves electric energy and water.
Example 2
As shown in fig. 1, a gas-fired heating water heater includes: the bathroom water heater comprises an operator 1, a main controller 2, a bathroom loop and a heating loop, wherein a circulating preheating water pump 3, a water flow sensor 4, a bathroom water inlet temperature probe 5, a first bathroom water outlet temperature probe 7 and a second bathroom water outlet temperature probe 9 which are connected with the main controller 2 are arranged on the loop, a heating temperature probe 6 is arranged on the heating loop, and a water storage tank 8 is further arranged on the bathroom loop to provide a constant temperature effect.
As shown in fig. 2, during the preheating of the bathroom circulation, the specific control method is as follows:
1) according to the requirement of GB 25034, the heat production water rate a of the gas heating water heater at the bathroom temperature rise of 30K is tested, and the water flow rate b of the temperature rise of 40K is 3 a/4.
2) And simulating the use environment of a user, testing the maximum circulating preheating water flow x, and enabling x to be less than b when the circulating preheating water pump is selected.
3) The operator 1 is provided with a water flow upper limit value (circulating preheating water flow threshold value) q for circulating preheating, the q value can be adjusted according to the characteristics of the gas heating water heater, and the condition that x is more than q and is less than or equal to b can be met.
4) The main controller 2 judges whether the property of the current water flow signal belongs to the user water or the circulating preheating water according to the time point of the water flow signal and the water flow. The determination method was as described in example 1.
Examples illustrate that: assuming that a zero cold water (with a circulating preheating function) gas heating water heater with the rated hot water heat input of 32kW has the nominal hot water production rate a of 25K and the water outlet rate of 16L/min, the maximum constant-temperature water outlet flow b is ensured to be 10L/min when the temperature rises to 40K. The water resistance of pipelines in different user homes is different, the flow x of the circularly preheated water is generally between 3L/min and 6L/min, and the x is assumed to be 6L/min in the example. Considering the precision of the water flow sensor, properly reducing the interval which can not judge the water flow property through the flow, simultaneously considering the temperature rise which can also ensure 40K when the water inlet temperature is lower so as to obtain hot water with high enough temperature, and setting the judgment flow q value to be 9L/min. Then there are:
1) when the preheating starting condition is met, the circulating preheating water pump 3 is started, the water flow is detected to be 6L/min, and the current circulating preheating is judged. When the starting condition of the circulating preheating function is not met, the water flow signal is detected, the current water use is judged as the user water, and the circulating preheating water pump 3 is not started before the secondary water flow signal disappears.
2) When the circulation preheating water pump 3 is in circulation preheating, the current water flow is detected to be larger than the preset 9L/min, the water consumption of a user is judged, and the circulation preheating water pump 3 stops running.
3) If the opening of the water valve is adjusted to be smaller by a user during the circulating preheating and the water outlet flow is between 6L/min and 9L/min, when the preheating flameout condition is not met even if the preheating combustion time exceeds 30min, the water valve is judged to be opened by the user, and the circulating preheating water pump 3 stops running immediately.
In this embodiment, when the temperature value of the bath water outlet temperature probe is less than or equal to the set bath water outlet target temperature-the set start temperature difference, or the temperature value of the bath water inlet temperature probe is less than or equal to the set bath water outlet target temperature-the start temperature difference-2 ℃, the main controller controls the start of the circulating preheating water pump to perform circulating preheating. When the temperature value of the bathing water inlet temperature probe is not less than the bathing water outlet target temperature of minus 2 ℃ or the temperature value of the bathing water outlet temperature probe is not less than the set bathing water outlet target temperature plus 10 ℃, the main controller controls the circulating preheating water pump to stop running.
The gas heating water heater that this embodiment provided, under the condition that does not increase waterway structure and check out test set, the intelligent judgement distinguishes circulation preheating water and user's water, guarantees the constant temperature effect of gas heating water heater hot water supply water, and the extension circulation preheats the water pump life-span, saves the electric energy.
It will be appreciated by those skilled in the art from the foregoing description of construction and principles that the invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the teachings of the art may be made without departing from the scope of the invention as defined by the appended claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (10)
1. A water flow property judging method of a hot water supply device is characterized in that the method is used on a hot water device with a circulating preheating function, the water flow during circulating preheating is smaller than the water flow of water for users through the selective setting of a circulating preheating water pump, and a main controller of the hot water device is used for setting a circulating preheating water flow threshold; in the circulating preheating process of the hot water device, if the water flow signal detected by the water flow sensor is greater than the circulating preheating water flow threshold value, the main controller of the hot water device judges that the water flow is used by a user, and at the moment, the circulating preheating water pump is controlled to stop running.
2. The method as claimed in claim 1, wherein if the water flow sensor detects the water flow signal, the main controller of the hot water apparatus determines that the water flow is the user water, and at this time, the circulating preheating water pump is not operated.
3. The method as claimed in claim 1, wherein the main controller of the hot water apparatus determines that the water flow is user water if the continuous operation time of the circulating preheating water pump exceeds a set time during the circulating preheating of the hot water apparatus, and then controls the circulating preheating water pump to stop operation.
4. The method as claimed in claim 1, wherein when the circulating preheating start condition is satisfied, the water flow detected by the water flow sensor is less than or equal to the set value, and the continuous operation time of the circulating preheating water pump is less than or equal to the set time, the main controller of the hot water apparatus determines that the water flow is the circulating preheating water, and then controls the circulating preheating water pump to continue to operate.
5. The method for judging the water flow property according to claim 1, wherein the value range of the circulating preheated water flow threshold is as follows: the water flow rate of the hot water device during circulating preheating is less than the circulating preheating water flow threshold value and less than 3a/4, wherein a represents the hot water production rate of the hot water device.
6. The method as claimed in claim 3, wherein the set time period is 30 minutes.
7. The method for determining water flow property according to claim 1, wherein the water heater is a gas water heater or a gas water heater.
8. A gas heating water heater is characterized by comprising a main controller and a bathroom loop, wherein a circulating preheating water pump, a water flow sensor, a bathing water inlet temperature probe and a bathing water outlet temperature probe which are connected with the main controller are arranged on the bathroom loop, and the controller controls the circulating preheating water pump to be started and perform circulating preheating according to signals fed back by the bathing water inlet temperature probe and the bathing water outlet temperature probe; and the main controller stores a circulating preheating water flow threshold, and in the circulating preheating process, if the water flow signal detected by the water flow sensor is greater than the circulating preheating water flow threshold, the main controller judges that the water flow is used by the user, and at the moment, the circulating preheating water pump is controlled to stop running.
9. The gas-fired heating water heater according to claim 8, wherein when the temperature value of the bath outlet water temperature probe is less than or equal to a set bath outlet water target temperature-a set starting temperature difference or the temperature value of the bath inlet water temperature probe is less than or equal to a set bath outlet water target temperature-a starting temperature difference-2 ℃, the main controller controls the circulating preheating water pump to start and perform circulating preheating.
10. The gas-fired heating water heater according to claim 9, wherein when the temperature value of the bathing inlet water temperature probe is greater than or equal to the bathing outlet water target temperature by-2 ℃ or the temperature value of the bathing outlet water temperature probe is greater than or equal to the set bathing outlet water target temperature by +10 ℃, the main controller controls the circulating preheating water pump to stop running.
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| CN201810170890.9A CN108679848B (en) | 2018-03-01 | 2018-03-01 | Water flow property judgment method of hot water supply device and gas heating water heater |
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| CN201810170890.9A CN108679848B (en) | 2018-03-01 | 2018-03-01 | Water flow property judgment method of hot water supply device and gas heating water heater |
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| CN110425754B (en) * | 2019-08-15 | 2023-10-13 | 广东万和新电气股份有限公司 | Circulating preheating and pressurizing control system and control method thereof |
| CN110726252A (en) * | 2019-09-29 | 2020-01-24 | 华帝股份有限公司 | Control method of water heater and water heater applying control method |
| CN110726251B (en) * | 2019-09-29 | 2021-07-16 | 华帝股份有限公司 | Control method of water heater and water heater applying control method |
| CN110864459B (en) * | 2019-10-30 | 2021-05-18 | 宁波方太厨具有限公司 | Water circulation control method of gas water heating device |
| CN111664572A (en) * | 2020-06-24 | 2020-09-15 | 海信(广东)厨卫系统有限公司 | Gas water heater and control method thereof |
| CN112484316A (en) * | 2020-12-11 | 2021-03-12 | 万家乐热能科技有限公司 | Zero-cold-water wall-mounted boiler with hot water pressurization function and control method |
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