CN116294233A - Circulation control method of water heater - Google Patents

Circulation control method of water heater Download PDF

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Publication number
CN116294233A
CN116294233A CN202310413063.9A CN202310413063A CN116294233A CN 116294233 A CN116294233 A CN 116294233A CN 202310413063 A CN202310413063 A CN 202310413063A CN 116294233 A CN116294233 A CN 116294233A
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China
Prior art keywords
water
water heater
flow
control method
circulation
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CN202310413063.9A
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Chinese (zh)
Inventor
王世平
原世超
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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Priority to CN202310413063.9A priority Critical patent/CN116294233A/en
Publication of CN116294233A publication Critical patent/CN116294233A/en
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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
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

The invention discloses a circulation control method of a water heater, which comprises the following steps: step S1, detecting the outlet water temperature T of the outlet water end of the water heater c Whether or not it is smaller than the preheating temperature T 1 The method comprises the steps of carrying out a first treatment on the surface of the If yes, execute step S2: recording water flow Q of detection point in circulating pipeline of water heater 1 And set a first flow threshold Q m The method comprises the steps of carrying out a first treatment on the surface of the S3, starting cyclic heating; s4, detecting water flow Q of detection points in a circulating pipeline of the water heater again through a water quantity sensor 2 And judge the water flow Q 2 Whether or not it is equal to or less than the first flow threshold Q m The method comprises the steps of carrying out a first treatment on the surface of the If yes, judging that the water heater is heated to the set temperature T 2 Step S5 is executed; if not, returning to the step S3; step S5, stopping circulationAnd (5) heating. The invention compares the water flow rate Q 2 And a first flow threshold Q m The size of the water heater is used for determining whether to close the circulation heating, so that the circulation path from the last detection point to the water inlet of the water heater can be omitted, and the aims of saving energy and reducing the circulation duration are achieved.

Description

Circulation control method of water heater
Technical Field
The invention relates to the field of circulating heating of water heaters, in particular to a circulating control method of a water heater.
Background
The zero cold water heater needs to form a closed circulation loop between the water heater and the water consumption point to keep the temperature of the hot water in a certain range in the circulation loop before using the hot water, and the water consumption point is opened to output the hot water. When the zero cold water gas water heater is installed without a return pipe, the cold water pipe is used as the return pipe and is connected with the cold water pipe and the hot water pipe to form a circulation loop, and water flows in the circulation loop of the circulation loop to heat.
In the existing circulation heating, whether the circulation heating is closed or not is judged, whether the return water temperature at the water inlet of the water heater reaches the set temperature or not is judged, the whole circulation path is long, the circulation heating time is long, and the waiting time is long after a user starts a circulation function.
Disclosure of Invention
The invention aims to overcome the defect of long circulating heating time of a water heater in the prior art and provides a circulating control method of the water heater.
The invention solves the technical problems by the following technical scheme:
a cycle control method of a water heater, comprising:
step S1, detecting the outlet water temperature T of the outlet water end of the water heater c Whether or not it is smaller than the preheating temperature T 1 The method comprises the steps of carrying out a first treatment on the surface of the If yes, executing step S2;
step S2, starting the circulating water pump, and recording the water flow Q of a detection point in a circulating pipeline of the water heater through a water quantity sensor 1 And according to the recorded water flow Q 1 Setting a first flow threshold Q m ；
S3, starting circulating heating of water in a circulating pipeline of the water heater;
s4, detecting water flow Q of detection points in a circulating pipeline of the water heater again through a water quantity sensor 2 And judge the detected water flow Q 2 Whether or not it is equal to or less than the first flow threshold Q m The method comprises the steps of carrying out a first treatment on the surface of the If yes, judging the water in the circulating pipeline of the water heaterIs heated to the set temperature T of the water heater 2 Step S5 is executed; if not, returning to the step S3;
and S5, stopping cyclic heating.
In the scheme, before cyclic heating, the water flow Q of a detection point is recorded 1 Size to set a first flow threshold Q m . After the circulation heating, detecting the water flow Q of the detection point in real time through a water quantity sensor 2 By comparing water flow rate Q 2 And a first flow threshold Q m The water in the circulating pipeline of the water heater is judged whether to be heated to the set temperature T of the water heater 2 Thereby determining whether to turn off the circulation heating. Compared with the prior art, by detecting whether the backwater temperature at the water inlet of the water heater reaches the set temperature T of the water heater 2 To determine whether to turn off the circulation heating, the scheme compares the water flow Q 2 And a first flow threshold Q m The size of the water heater is used for determining whether to close the circulation heating, so that the circulation path from the last detection point to the water inlet of the water heater can be omitted, and the aims of saving energy and reducing the circulation duration are achieved.
Preferably, the detection point is provided with a water quantity control module, and the water quantity control module is arranged to be capable of adjusting the water flow of the detection point according to the water temperature.
In the scheme, the water flow of the detection point is regulated through the water temperature, so that the water temperature in the circulating pipeline can reach the set temperature of the water heater.
Preferably, the detection point is a water consumption point.
In the scheme, the water consumption point is used as the detection point, so that the water temperature at the water consumption point can meet the set temperature, and the requirements of users are met.
Preferably, the water quantity control module is a thermal balance valve, and the thermal balance valve is arranged to be capable of adjusting the opening degree according to the water temperature.
In the scheme, the opening degree of the thermal balance valve is adjusted to adjust the water flow flowing through the thermal balance valve, so that the water flow at the detection point is adjusted.
Preferably, in step S2, the opening degree of the thermodynamic equilibrium valve is maximized.
In this embodiment, the above arrangement is used to ensure the water flow rate Q in step S2 1 The opening degree of the thermodynamic equilibrium valve is not reduced, thereby improving the flow rate Q of water 1 The set first flow threshold Q m Thereby improving the precision of the circulation control of the water heater.
Preferably, step S2 includes:
step S21, continuously recording water flow Q of detection points in a circulating pipeline of the water heater for a plurality of times through a water quantity sensor 1 And judging the water flow Q recorded by any two times 1 Whether the difference between them is less than or equal to the second flow threshold Q n The method comprises the steps of carrying out a first treatment on the surface of the If yes, go to step S22;
step S22, calculating a plurality of water flow rates Q 1 Average value DeltaQ of (1) 1 ；
Step S23, according to the average value DeltaQ 1 Setting a first flow threshold Q m 。
In this solution, the arrangement described above is used to ensure the recorded water flow rate Q 1 In a stable state, so that according to the water flow rate Q 1 Set first flow threshold Q m More accurate.
Preferably, in step S21, the water flow rate Q of the detection point in the circulation pipeline of the water heater is recorded every 2S by the water flow sensor 1 。
In this scheme, the water flow rate Q is recorded at the same time interval 1 The recorded data is made more accurate.
Preferably, in step S21, the water flow rate Q of the detection point in the circulation line of the water heater is continuously recorded by the water flow sensor 1 The number of times of (2) is equal to or greater than three.
In the scheme, a plurality of groups of water flow Q are recorded 1 The recorded data is made more accurate.
Preferably, in step S22, the last recorded tertiary water flow Q of the water quantity sensor is selected 1 Calculating the average value DeltaQ 1 。
In the scheme, the more recently recorded data is suitable for the current water flow condition in the circulating pipeline, the data recorded when the water flow in the circulating pipeline in the earlier stage is unstable can be discharged, and the recorded data is more accurate.
Preferably, the second flow threshold Q n Less than or equal to 0.2L/min.
In this embodiment, the above arrangement is used to control the water flow rate Q 1 Average value DeltaQ of (1) 1 To a lesser extent, ensure the recorded water flow rate Q 1 In a stable state.
Preferably, in step S22, a first flow threshold Q m The calculation mode of (a) is as follows: q (Q) m ≤2/3*ΔQ 1 。
In this embodiment, a first flow threshold Q is provided m Is calculated by the method.
Preferably, in step S4, the water flow Q at the detection point in the circulation line of the water heater is recorded by the water flow sensor 2 And judge the water flow Q for multiple times 2 Average value DeltaQ of (1) 2 Whether or not it is equal to or less than the first flow threshold Q m 。
In this solution, the above arrangement is used to avoid the flow of water Q because of a single pass 2 Erroneous judgment caused by instability improves the precision of the circulation control of the water heater.
Preferably, in step S4, the water flow rate Q of the detection point in the circulation line of the water heater is recorded every 1S by the water flow sensor 2 。
In this scheme, the water flow rate Q is recorded at the same time interval 2 So that the recorded data is more accurate.
Preferably, in step S4, the water flow rate Q of the detection point in the circulation line of the water heater is recorded by the water flow sensor 2 The number of times of (2) is equal to or greater than three.
In the scheme, a plurality of groups of water flow Q are recorded 2 The recorded data is made more accurate.
Preferably, in step S4, the last recorded tertiary water flow Q of the water quantity sensor is selected 2 Calculating the average value DeltaQ 2 。
In the scheme, the more recently recorded data is suitable for the current water flow condition in the circulating pipeline, the data recorded when the water flow in the circulating pipeline in the earlier stage is unstable can be discharged, and the recorded data is more accurate.
Preferably, the preheating temperature T 1 The method meets the following conditions: t (T) 1 ＜T 2 -5。
In this scheme, above-mentioned setting is used for preventing that the water heater from frequently opening cyclic heating, plays energy-conserving effect.
The invention has the positive progress effects that: before cyclic heating, the water flow Q of the detection point is recorded 1 Size to set a first flow threshold Q m . After the circulation heating, detecting the water flow Q of the detection point in real time through a water quantity sensor 2 By comparing water flow rate Q 2 And a first flow threshold Q m The water in the circulating pipeline of the water heater is judged whether to be heated to the set temperature T of the water heater 2 Thereby determining whether to turn off the circulation heating. Compared with the prior art, by detecting whether the backwater temperature at the water inlet of the water heater reaches the set temperature T of the water heater 2 To determine whether to turn off the circulation heating or not by comparing the water flow rate Q 2 And a first flow threshold Q m The size of the water heater is used for determining whether to close the circulation heating, so that the circulation path from the last detection point to the water inlet of the water heater can be omitted, and the aims of saving energy and reducing the circulation duration are achieved.
Drawings
Fig. 1 is a schematic diagram of a circulation control system of a water heater according to an embodiment 1 of the present invention.
Fig. 2 is a flow chart of a circulation control method of a water heater according to an embodiment 1 of the invention.
Fig. 3 is a schematic flow chart of a circulation control method of a water heater according to an embodiment 1 of the invention.
Fig. 4 is a schematic perspective view of a thermodynamic equilibrium valve according to an embodiment 2 of the present invention.
Fig. 5 is a schematic diagram showing the internal structure of a thermodynamic equilibrium valve according to an embodiment 2 of the present invention.
Fig. 6 is a schematic diagram showing the internal structure of a check valve according to embodiment 2 of the present invention.
Fig. 7 is a schematic structural diagram of a bimetal strip matched with a water through hole according to embodiment 2 of the present invention.
Fig. 8 is a schematic diagram of another structure of the bimetal strip and the water through hole according to the embodiment 2 of the present invention.
Fig. 9 is a schematic diagram of a bimetal strip according to embodiment 2 of the present invention fully covering the water through holes.
Reference numerals illustrate:
water heater 1
Second hot water outlet 11
Second cold water inlet 12
Hot water pipe 21
Cold water pipe 22
With water spot 3
Hot water end 31
Cold water end 32
Thermodynamic equilibrium valve 4
Housing 41
Hot water inlet 411
First hot water outlet 412
First cold water inlet 413
Cold water outlet 414
Municipal water supply end 5
Check valve 6
Valve body 61
Water flow channel 611
Water inlet 612
Water outlet 613
Valve seat 614
Valve core 62
Valve core body 621
Valve stem 622
Elastic member 63
Water deflector 64
Water hole 641
Bimetallic strip 65
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a circulation control system of a water heater 1, which includes a water heater 1, a hot water pipe 21, a cold water pipe 22 and a water consumption point 3, wherein the water heater 1, the hot water pipe 21, the cold water pipe 22 and the water consumption point 3 are connected to form a circulation control loop of the water heater 1, and pipes in the circulation control loop of the hot water pipe 21, the cold water pipe 22 and the like are circulation pipes of the water heater 1. The water heater 1 in this embodiment is a zero-cooling water gas water heater.
As shown in fig. 1, the water heater 1 has a second hot water outlet 11 and a second cold water inlet 12, and the second cold water inlet 12 is connected to the municipal water supply 5 through a cold water pipe 22 to obtain tap water. The cold water taken in at the second cold water inlet 12 is heated by the water heater 1 and discharged from the water heater 1 through the second hot water outlet 11 to be supplied to the water spot 3 in need.
As shown in fig. 1, the water-using point 3 has a hot water end 31 and a cold water end 32, the hot water end 31 being in communication with the second hot water outlet 11 of the water heater 1 to obtain hot water heated by the water heater 1, the cold water end 32 being in communication with the second cold water inlet 12 of the water heater 1 to obtain cold water not heated by the water heater 1. Alternatively, the cold water end 32 of the water spot 3 may also take cold water directly from the municipal water supply end 5. The water point 3 in this embodiment may specifically be a faucet or the like.
As shown in fig. 2 and 3, the present embodiment further provides a circulation control method of the water heater 1, including:
step S1, detecting the outlet water temperature T of the outlet water end of the water heater 1 c Whether or not it is smaller than the preheating temperature T 1 The method comprises the steps of carrying out a first treatment on the surface of the If yes, executing step S2;
step S2, starting the circulating water pump, and recording the water flow Q of a detection point in a circulating pipeline of the water heater 1 through a water quantity sensor 1 And according to the recorded water flow Q 1 Setting a first flow threshold Q m ；
Step S3, starting the circulation heating of water in a circulation pipeline of the water heater 1;
step S4, detecting the water flow Q of the detection point in the circulating pipeline of the water heater 1 again through the water quantity sensor 2 And judging the detected water flowQ 2 Whether or not it is equal to or less than the first flow threshold Q m The method comprises the steps of carrying out a first treatment on the surface of the If yes, judging that the water in the circulating pipeline of the water heater 1 is heated to the set temperature T of the water heater 1 2 Step S5 is executed; if not, returning to the step S3;
and S5, stopping cyclic heating.
Specifically, in step S1, the water outlet end of the water heater 1 refers to the end of the second hot water outlet 11 of the water heater 1, for outputting the hot water heated by the water heater 1, and the preheating temperature T 1 Refers to the temperature at which the water heater 1 can be started to circularly heat, namely the temperature T of the water outlet heated by the water heater 1 needs to be judged c Whether the temperature is lower than the temperature at which the water heater 1 starts the cyclic heating; if yes, starting a cycle; if not, the subsequent steps are not continued.
When the water outlet temperature T is judged for the first time c Less than the preheating temperature T 1 In this case, the first cycle learning is required, i.e., the process proceeds to step S2. In step S2, the circulating water pump is started to start the flow of water in the circulation control circuit of the water heater 1, but at this time, the water in the circulation pipe is not heated, and the water temperature in the circulation pipe is kept constant. First recording water flow Q of detection point 1 Size to set a first flow threshold Q m For later comparison.
Wherein the preheating temperature T 1 Can satisfy the following conditions: t (T) 1 ＜T 2 -5, i.e. the preheating temperature T 1 At least 5 ℃ lower than the set temperature of the water heater 1, thereby preventing the water heater 1 from being frequently started to circularly heat and playing a role in saving energy. Preferably, the preheating temperature T 1 And the set temperature T of the water heater 1 2 The temperature difference between the two water heaters is not too large, so that the single-cycle heating time of the water heater 1 is ensured not to be too long, and the use feeling of a user is improved. In other alternative embodiments, the temperature T is preset 1 The design can also be carried out according to the actual requirements.
To a first flow threshold value Q m After the setting is completed, the water heater 1 is started for cyclic heating, the water temperature in the circulating pipeline is gradually increased, step S4 is carried out at the moment, and then the water flow Q of the detection point is detected in real time through the water quantity sensor 2 General purpose medicineOver-contrast water flow rate Q 2 And a first flow threshold Q m The water in the circulating pipeline of the water heater 1 is judged whether to be heated to the set temperature T of the water heater 1 2 Thereby determining whether to turn off the circulation heating.
Compared with the prior art, by detecting whether the return water temperature at the second cold water inlet 12 of the water heater 1 reaches the set temperature T of the water heater 1 2 To determine whether to turn off the circulation heating, the embodiment is to compare the water flow rate Q 2 And a first flow threshold Q m The size of the water heater is used for determining whether to close the circulation heating, so that the circulation path from the last detection point to the water inlet of the water heater 1 can be omitted, and the aims of saving energy and reducing the circulation duration are achieved.
The circulation control system of the water heater 1 further comprises a water quantity control module, wherein the water quantity control module is arranged at the detection point and is arranged to be capable of adjusting the water flow of the detection point according to the water temperature, so that the water temperature in the circulation pipeline can reach the set temperature of the water heater 1.
Specifically, the detection point in the present embodiment is the water point 3, so that the water temperature at the water point 3 can be used to satisfy the set temperature, thereby satisfying the needs of the user. In other alternative embodiments, the detection point may also be selected at other locations in the circulation control loop of the water heater 1, for example between the second hot water outlet of the water heater 1 and the water usage point 3, or between the second cold water inlet of the water heater 1 and the water usage point 3.
Further, the water quantity control module in the embodiment is a thermal balance valve 4, and the thermal balance valve 4 is configured to be capable of adjusting the opening according to the water temperature, so that the water flow flowing through the thermal balance valve 4 is adjusted by adjusting the opening of the thermal balance valve 4, and the water flow adjustment of the detection point is realized. The opening degree of the thermodynamic equilibrium valve 4 is a term of art and will not be described herein. The structure for controlling the opening degree in the thermodynamic equilibrium valve 4 may employ a temperature sensing structure such as a bimetal so as to be deformable according to a change in water temperature.
Preferably, in step S2, the opening of the thermodynamic equilibrium valve 4 is maximized, ensuring the water flow in step S2Quantity Q 1 The opening degree of the thermodynamic equilibrium valve 4 is not reduced, thereby improving the flow rate Q according to the water 1 The set first flow threshold Q m Further, the accuracy of the circulation control of the water heater 1 is improved. Further, the opening degree of the thermodynamic equilibrium valve 4 may have only two states, namely a fully open state and a fully closed state. When the thermodynamic equilibrium valve 4 is in the fully open state, the opening degree of the fully open state is maximum, i.e. the water flow rate is maximum. When the thermodynamic equilibrium valve 4 is in the fully closed state, the opening degree of the fully open state is minimum, i.e. the water flow rate is minimum. The opening degree of the thermodynamic equilibrium valve 4 in the present embodiment is only a position of the thermodynamic equilibrium valve 4 that changes due to the influence of the water temperature.
The step S2 comprises the following steps:
step S21, continuously recording the water flow Q of detection points in the circulating pipeline of the water heater 1 for a plurality of times through a water quantity sensor 1 And judging the water flow Q recorded by any two times 1 Whether the difference between them is less than or equal to the second flow threshold Q n The method comprises the steps of carrying out a first treatment on the surface of the If yes, go to step S22;
step S22, calculating a plurality of water flow rates Q 1 Average value DeltaQ of (1) 1 ；
Step S23, according to the average value DeltaQ 1 Setting a first flow threshold Q m 。
Specifically, a plurality of sets of water flow rates Q are recorded 1 Is to avoid because of the single water flow Q 1 The erroneous judgment caused by instability makes the recorded data more accurate, thereby improving the accuracy of the circulation control of the water heater 1. Wherein, the water flow Q recorded by any two times 1 The difference value between the two flow rate thresholds is smaller than or equal to the second flow rate threshold Q n Meaning, in other words, a recorded plurality of water flows Q 1 The fluctuation of the flow rate is small, and the water flow rate is in a stable state, so that the calculated average value delta Q 1 Is calculated data under the condition that the water flow of the detection point is stable, and avoids a certain water flow Q 1 Too high or too low affects the average Δq 1 Is a precision of (a).
It should be noted that the water flow rate Q recorded at any two times 1 Differences betweenThe values are positive numbers.
Further, in step S21, the water flow rate Q of the detection point in the circulation line of the water heater 1 is recorded every 2S by the water flow sensor 1 . Recording water flow rate Q at equal time intervals 1 The recorded data is made more accurate. In other alternative embodiments, the recording time interval of the water quantity sensor can be designed according to the actual requirements.
In step S21, the water flow rate Q of the detection point in the circulation line of the water heater 1 is continuously recorded by the water flow sensor 1 The number of times of (2) is equal to or greater than three. Further, in step S22, the third water flow Q newly recorded by the water flow sensor is selected 1 Calculating the average value DeltaQ 1 Wherein, the latest recorded tertiary water flow Q is ensured 1 The flow difference between every two is smaller than or equal to the second flow threshold Q n I.e. of the three last recorded water flows Q 1 With the water flow rate Q recorded for the second time 1 Difference between them, second recorded water flow Q 1 And the water flow rate Q recorded for the third time 1 The difference between them, the first recorded water flow Q 1 And the water flow rate Q recorded for the third time 1 The difference value between the two flow rate thresholds is smaller than or equal to the second flow rate threshold Q n The water flow rate Q recorded by the water quantity sensor before 1 The difference between may be greater than the second flow threshold Q n . The more recently recorded data is suitable for the current water flow condition in the circulating pipeline, the data recorded when the water flow in the circulating pipeline in the earlier stage is unstable can be discharged, so that the recorded data is more accurate.
In step S21, the water flow Q of any two times is satisfied 1 The difference value between the two flow rate thresholds is less than or equal to a second flow rate threshold Q n The next step is performed to ensure the recorded water flow Q 1 In a stable state, so that according to the water flow rate Q 1 Set first flow threshold Q m More accurate. Wherein the second flow rate threshold Q n Can be less than or equal to 0.2L/min so as to control the water flow Q 1 Average value DeltaQ of (1) 1 Controlled to a smaller extentIn, ensure the recorded water flow Q 1 In a stable state.
In step S22, a first flow threshold Q m The calculation mode of (a) is as follows: q (Q) m ≤2/3*ΔQ 1 . In other alternative embodiments, the first flow threshold Q m The design can also be carried out according to the actual requirements.
In step S4, the water flow Q at the detection point in the circulation line of the water heater 1 is recorded by the water flow sensor a plurality of times 2 And judge the water flow Q for multiple times 2 Average value DeltaQ of (1) 2 Whether or not it is equal to or less than the first flow threshold Q m 。
Specifically, a plurality of sets of water flow rates Q are recorded 2 Is to avoid because of the single water flow Q 2 The erroneous judgment caused by instability makes the recorded data more accurate, thereby improving the accuracy of the circulation control of the water heater 1. In step S4, the water flow sensor records the water flow Q of the detection point in the circulation line of the water heater 1 every 1S 2 . Recording water flow rate Q at equal time intervals 2 So that the recorded data is more accurate. In other alternative embodiments, the recording time interval of the water quantity sensor can be designed according to the actual requirements.
In step S4, the water flow rate Q of the detection point in the circulation line of the water heater 1 is recorded by the water flow sensor 2 The number of times of (2) is equal to or greater than three. Further, in step S4, the third water flow Q newly recorded by the water flow sensor is selected 2 Calculating the average value DeltaQ 2 . The more recently recorded data is suitable for the current water flow condition in the circulating pipeline, the data recorded when the water flow in the circulating pipeline in the earlier stage is unstable can be discharged, so that the recorded data is more accurate.
Example 2
The present embodiment provides a specific structure of a thermodynamic equilibrium valve on the basis of embodiment 1.
As shown in fig. 1, 4-6, the thermodynamic equilibrium valve 4 includes a housing 41 and a check valve 6 provided inside the housing 41, and the housing 41 includes a hot water inlet 411, a first hot water outlet 412, a first cold water inlet 413, and a cold water outlet 414. One end of the hot water pipe 21 is connected with the second hot water outlet of the water heater 1, the other end of the hot water pipe 21 is connected with the hot water inlet 411 of the shell 41, and the first hot water outlet 412 of the shell 41 is connected with the hot water end 31 of the water consumption point 3. One end of the cold water pipe 22 is connected with the second cold water inlet 12 of the water heater 1, the other end of the cold water pipe 22 is connected with the first cold water inlet 413 of the shell 41, and the cold water outlet 414 of the shell 41 is connected with the cold water end 32 of the water consumption point 3. In the embodiment, the water heater 1, the hot water pipe 21, the cold water pipe 22 and the water point 3 are connected into a circulation control loop of the water heater 1 through the thermodynamic balance valve 4.
As shown in fig. 6 to 9, the check valve 6 includes a valve body 61, a valve spool 62, an elastic member 63, a water stopper 64, and a bimetal 65.
As shown in fig. 5 to 9, the valve body 61 is fixed to the inner wall surface of the housing 41 of the thermodynamic equilibrium valve 4, and a water flow passage 611 is provided inside the valve body 61, the water flow passage 611 communicating with the inside of the housing 41 to supply water to flow. The water flow channel 611 has two ports in the axial direction of the check valve 6, namely, a water inlet 612 and a water outlet 613 of the valve body 61, respectively, and water flows into the check valve 6 from the water inlet 612 of the valve body 61 and flows out of the check valve 6 from the water outlet 613 of the valve body 61. Wherein, the hot water inlet 411 and the first hot water outlet 412 of the housing 41 are located at one side of the water inlet 612 of the check valve 6 (left side of the check valve 6 in fig. 5), and the first cold water inlet 413 and the cold water outlet 414 of the housing 41 are located at one side of the water outlet 613 of the check valve 6 (right side of the check valve 6 in fig. 5).
As shown in fig. 6 and 9, the valve body 62 and the elastic member 63 are both provided in the water flow passage 611, and the elastic member 63 is used to bias the valve body 62 to engage the valve body 62 with the valve seat 614 of the valve body 61 to close the check valve 6. Specifically, the spool 62 includes a spool body 621 and a valve stem 622. The spool body 621 is located at one end of the spool 62 near the water inlet port 612 of the valve body 61, and the spool body 621 is for abutting against the valve seat 614 of the valve body 61 to open or close the check valve 6. The valve rod 622 is located at one end of the valve core 62 near the water outlet 613 of the valve body 61, and the elastic member 63 is sleeved on the valve rod 622 and abuts against the valve core body 621, so as to apply a force to the valve core body 621 in the direction of the valve seat 614 of the valve body 61, and further close the check valve 6. The elastic member 63 in this embodiment is a spring. In other alternative embodiments, the elastic member 63 may be other elastic members capable of achieving the above-described functions.
As shown in fig. 6 to 9, the water guard 64 is provided in the water flow passage 611 and is fixed to the inner wall surface of the valve body 61 to ensure stable positions of the water guard 64 and the valve body 61. The water blocking member 64 is provided with a plurality of water passing holes 641, and the water passing holes 641 are penetrated at both ends of the check valve 6 in the axial direction so that water can flow to the water outlet 613 of the valve body 61 through the water passing holes.
As shown in fig. 6 to 9, one end of the bimetal 65 is connected to the water blocking member 64, and the other end of the bimetal 65 is inclined to extend in a direction away from the water blocking member 64 and is provided to be movable in a direction approaching or separating from the water passing hole 641 according to the water temperature. The bimetal 65 has a characteristic of being deformed by the difference in temperature, so that the bimetal 65 can be deformed according to the change of the water temperature in the water flow channel 611, and the degree of deformation of the bimetal 65 is related to the temperature to which it is subjected.
The bimetal 65 in this embodiment includes only two states, namely, a fully open state and a fully closed state. Specifically, the bimetal 65 shown in fig. 6 is in the fully opened state, and the other end of the bimetal 65 is farthest from the water stopper 64. The bimetal 65 shown in fig. 9 is in a completely closed state, and the other end of the bimetal 65 is nearest to the water stopper 64.
When the water temperature rises to be equal to or higher than the action temperature of the bimetal 65, the bimetal 65 can move towards the direction close to the water passing hole 641, the bimetal 65 is switched from the fully opened state to the fully closed state, the bimetal 65 completely covers the water passing hole 641, and the water inlet 612 and the water outlet 613 of the one-way valve 6 are not communicated. Since the hot water inlet 411 and the first hot water outlet 412 of the housing 41 of the thermodynamic balance valve 4 are both positioned at one side of the water inlet 612 of the check valve 6, and the first cold water inlet 413 and the cold water outlet 414 of the housing 41 are both positioned at one side of the water outlet 613 of the check valve 6, the hot water section and the cold water section of the thermodynamic balance valve 4 are not communicated with each other, thereby not only ensuring that the hot water pipe 21 is filled with hot water, but also ensuring that cold water in the cold water pipe 22 is not heated any more, and reducing heat waste.
When the water temperature drops below the operating temperature of the bimetal 65, the deformation of the bimetal 65 gradually disappears, the bimetal 65 can move toward a direction away from the water passing hole 641, the water passing hole 641 is opened, and the bimetal 65 is switched from the fully closed state to the fully open state. The opening of the water passing hole 641 in the present embodiment refers to a case where the distance between the bimetal 65 and the water passing hole 641 increases, and the water flow resistance in the area of the water passing hole 641 decreases and the water flow becomes large, because the bimetal 65 moves in a direction away from the water passing hole 641.
The operating temperature of the bimetal 65 may be selected according to the characteristics of the water point.
In this embodiment, a water quantity sensor (not shown in the figure) for detecting the water flow quantity at the water passing hole 641 may be further installed on the water heater 1, so as to determine whether the water temperature reaches the preset temperature through the detected water flow quantity at the water passing hole 641, thereby turning off the circulation heating in time and saving energy.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, are based on the orientation or positional relationship of the devices or components as shown in the drawings, merely to facilitate describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.
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 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 principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (16)

1. A cycle control method of a water heater, comprising:
step S1, detecting the outlet water temperature T of the outlet water end of the water heater c Whether or not it is smaller than the preheating temperature T 1 The method comprises the steps of carrying out a first treatment on the surface of the If yes, executing step S2;
step S2, starting the circulating water pump, and recording the water flow Q of a detection point in a circulating pipeline of the water heater through a water quantity sensor 1 And according to the recorded water flow Q 1 Setting a first flow threshold Q m ；
S3, starting circulating heating of water in a circulating pipeline of the water heater;
s4, detecting water flow Q of detection points in a circulating pipeline of the water heater again through a water quantity sensor 2 And judge the detected water flow Q 2 Whether or not it is equal to or less than the first flow threshold Q m The method comprises the steps of carrying out a first treatment on the surface of the If yes, judging that the water in the circulating pipeline of the water heater is heated to the set temperature T of the water heater 2 Step S5 is executed; if not, returning to the step S3;
and S5, stopping cyclic heating.
2. The circulation control method of a water heater according to claim 1, wherein the detection point is provided with a water quantity control module, and the water quantity control module is configured to be able to adjust the water flow quantity of the detection point according to the water temperature.
3. The circulation control method of a water heater according to claim 2, wherein the detection point is a water consumption point.
4. The circulation control method of a water heater according to claim 2, wherein the water quantity control module is a thermodynamic balance valve, and the thermodynamic balance valve is configured to be able to adjust an opening degree according to a water temperature.
5. The circulation control method of a water heater according to claim 4, wherein the opening degree of the thermodynamic equilibrium valve is maximized in step S2.
6. The circulation control method of a water heater as claimed in claim 1, wherein the step S2 includes:
step S21, continuously recording water flow Q of detection points in a circulating pipeline of the water heater for a plurality of times through a water quantity sensor 1 And judging the water flow Q recorded by any two times 1 Whether the difference between them is less than or equal to the second flow threshold Q n The method comprises the steps of carrying out a first treatment on the surface of the If yes, go to step S22;
step S22, calculating a plurality of water flow rates Q 1 Average value DeltaQ of (1) 1 ；
Step S23, according to the average value DeltaQ 1 Setting a first flow threshold Q m 。
7. The circulation control method of the water heater as claimed in claim 6, wherein in step S21, the water quantity sensor records the water flow rate Q of the detection point in the circulation line of the water heater every 2S 1 。
8. The circulation control method of the water heater as set forth in claim 6, wherein in step S21, the water quantity sensor continuously records the water flow rate Q of the detection point in the circulation line of the water heater 1 The number of times of (2) is equal to or greater than three.
9. The circulation control method of a water heater according to claim 8, wherein in step S22, the three water flows Q newly recorded by the water quantity sensor are selected 1 Calculating the average value DeltaQ 1 。
10. The circulation control method of a water heater according to claim 6, wherein the second flow rate threshold Q n Less than or equal to 0.2L/min.
11. The circulation control method of a water heater according to claim 6, wherein in step S22, the first flow rate threshold Q m The calculation mode of (a) is as follows: q (Q) m ≤2/3*ΔQ 1 。
12. As claimed inThe circulation control method of the water heater according to 1, characterized in that in step S4, the water flow Q of the detection point in the circulation pipeline of the water heater is recorded for a plurality of times by the water quantity sensor 2 And judge the water flow Q for multiple times 2 Average value DeltaQ of (1) 2 Whether or not it is equal to or less than the first flow threshold Q m 。
13. The circulation control method of the water heater as claimed in claim 12, wherein in the step S4, the water quantity sensor records the water flow rate Q of the detection point in the circulation line of the water heater every 1S 2 。
14. The circulation control method of the water heater according to claim 12, wherein in step S4, the water quantity sensor records the water flow rate Q of the detection point in the circulation line of the water heater 2 The number of times of (2) is equal to or greater than three.
15. The circulation control method of a water heater according to claim 14, wherein in step S4, the three water flows Q newly recorded by the water quantity sensor are selected 2 Calculating the average value DeltaQ 2 。
16. The circulation control method of a water heater as claimed in claim 1, wherein the preheating temperature T 1 The method meets the following conditions: t (T) 1 ＜T 2 -5。
CN202310413063.9A 2023-04-14 2023-04-14 Circulation control method of water heater Pending CN116294233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310413063.9A CN116294233A (en) 2023-04-14 2023-04-14 Circulation control method of water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310413063.9A CN116294233A (en) 2023-04-14 2023-04-14 Circulation control method of water heater

Publications (1)

Publication Number Publication Date
CN116294233A true CN116294233A (en) 2023-06-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310413063.9A Pending CN116294233A (en) 2023-04-14 2023-04-14 Circulation control method of water heater

Country Status (1)

Country Link
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