Operation method of gas water heater and gas water heater

Abstract

The invention discloses an operation method of a gas water heater and the gas water heater. The operation method of the gas water heater comprises the following steps that S1, the water heater is in a standby state; s2, judging whether an intelligent pressurizing function is selected or not, if so, entering S3, and if not, returning to S1; s3, entering an intelligent pressurization standby mode; s4, judging whether L1 is greater than L for starting up, if so, entering S5, and if not, returning to S3; s5, starting up and igniting, and calculating the maximum heating water flow Lmax of the rated load of the gas water heater according to the water inlet temperature T1 and the preset water outlet temperature T2; s6, entering a common shower mode; s7, judging whether hot water is boiled at multiple water points or not, if yes, entering S10, and if not, entering S8; s8, judging whether cold water is boiled at a more water point or not, if so, entering S10, and if not, entering S9; s9, judging whether L1 is greater than L for starting up, if yes, returning to S6, and if not, returning to S3; and S10, the intelligent pressurization mode is operated.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to an operating method of a gas water heater and a gas water heater. Background Art

[0002] When using a gas water heater, if you open one of the hot water faucets (such as the main bathroom hot water faucet) and then open other water points (such as the guest bathroom faucet, kitchen faucet, flush toilet), the water flow of the original hot water faucet will suddenly decrease, and in severe cases, the water flow will drop by more than 30%. If the original hot water faucet is mixed with cold water, when the water is turned on at multiple water points, the amount of hot water in the original hot water faucet will decrease, and the cold water mixing ratio will increase, and the outlet water temperature will drop simultaneously. In severe cases, the water temperature will drop by more than 3°C. This shows that when using a gas water heater, turning on and off water at multiple points will cause a significant change in water flow and temperature, which will directly affect the user experience.

[0003] Therefore, there is an urgent need for an operating method of a gas water heater to solve the above problems. Summary of the invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes an operating method for a gas water heater, which determines whether there are multiple water-using points for turning on hot water or multiple water-using points for turning on cold water, and then turns on the water pump to adjust the water flow and water pressure so that the water flow and water pressure can meet the needs of turning on hot water or multiple water-using points for turning on cold water.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A method for operating a gas water heater comprises the following steps:

[0007] S1: water heater standby;

[0008] S2: Determine whether the intelligent boost function is selected. If yes, go to S3; if no, return to S1;

[0009] S3: Enter intelligent boost standby mode;

[0010] S4: Determine whether L1>L 开机 , if yes, go to S5, if no, return to S3;

[0011] S5: Turn on the ignition, and calculate the maximum heating water flow Lmax of the rated load of the gas water heater according to the water inlet temperature T1 and the preset water outlet temperature T2;

[0012] S6: Enter normal shower mode;

[0013] S7: Determine whether to use more water to turn on the hot water, if so, go to S10, if not, go to S8;

[0014] S8: Determine whether to use more water to turn on the cold water, if so, go to S10, if not, go to S9;

[0015] S9: Determine whether L1>L 开机 , if yes, return to S6, if no, return to S3;

[0016] S10: Run the intelligent boost mode;

[0017] S10 includes the following steps:

[0018] S101: The water pump operates according to the initial working current I 初 start up;

[0019] S102: Adjust the water pump operating current I1 so that L1 < Lmax;

[0020] S103: Maintain the current working condition;

[0021] S104: Determine whether to turn off the water at the multiple water points. If so, turn off the water pump, exit the intelligent boost mode and enter S106. If not, directly enter S107.

[0022] S106: Determine whether L1>L 开机 , if yes, return to S6, if no, return to S1;

[0023] S107: Determine whether L1>L 开机 If yes, then return to S103, if no, then return to S1;

[0024] Among them, L1 is the actual water flow, L 开机 is the preset startup water flow, 30%×Imax<I 初 <60%×Imax, Imax is the maximum working current of the water pump.

[0025] Optionally, S102 includes the following steps:

[0026] S1021: Determine whether L1>Lmax, if yes, proceed to S1022, if no, proceed to S1025;

[0027] S1022: The water pump operating current I1 decreases by ΔI 减 ;

[0028] S1023: Determine whether I1=Imin, if so, proceed to S1028, if not, proceed to S1024;

[0029] S1024: Determine whether L1>Lmax, if so, return to S1022, if not, go to S1028;

[0030] S1025: Determine whether P1>Ptarget, if yes, proceed to S1028, if no, proceed to S1026:

[0031] S1026: Water pump operating current I1 increases by ΔI 增 ;

[0032] S1027: Determine whether I1=Imax, if so, proceed to S1028, if not, return to S1021;

[0033] S1028: Adjust firepower according to T1, T2 and L1;

[0034] S1029: Determine whether T3 = T2. If so, maintain the current working condition and then enter S104. If not, return to S1028.

[0035] Among them, ΔI 减 is the decreasing current, ΔI 增 is the increasing current, P 目标 is the preset target water pressure, P1 is the actual water pressure, Imin is the minimum operating current of the water pump, Imax is the maximum operating current of the water pump, 5%×I 原 <ΔI 减 <10%×I1 原 , I 原 is the working current of the water pump before the change, ΔI 减 <ΔI 增 , T3 is the actual outlet water temperature.

[0036] Optionally, P 目标 =P1×ΔP 目标 , when it is judged in S7 that more water is used, the hot water is turned on, ΔP 目标 Obtain the value as follows:

[0037] When ΔP 降 ≥ΔP 降max When ΔP 目标 =ΔP 热补max ;

[0038] When ΔP 降 <ΔP 降max When ΔP 目标 =ΔP 热补min +(ΔP 热补max -ΔP 热补min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min );

[0039] When it is judged in S7 that the water consumption is too high, turn on the cold water, ΔP 目标 Obtain the value as follows:

[0040] When ΔP 降 ≥ΔP 降max When ΔP 目标 =ΔP 冷补max ;

[0041] When ΔP 降 <ΔP 降max When ΔP 目标 =ΔP 冷补min +(ΔP 冷补max -ΔP 冷补min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min );

[0042] Among them, ΔP 目标 is the target boost compensation amplitude; ΔP 降 is the actual water pressure drop amplitude, ΔP 降max is the preset maximum water pressure drop amplitude, ΔP 热补max The preset maximum pressure increase compensation amplitude when hot water is turned on at multiple water points, ΔP 冷补max The preset maximum pressure increase compensation amplitude when turning on cold water at multiple water points, ΔP 降min is the preset minimum water pressure drop amplitude, ΔP 热补min The preset minimum pressure increase compensation amplitude when hot water is turned on at multiple water points, ΔP 冷补min The preset minimum pressure increase compensation range when turning on cold water at a multi-use water point; 30%<ΔP 降max <50%,ΔP 降min =ΔP Set; ΔP 设 The preset water pressure drop value is 10% × P 原 <ΔP 设 <30%×P 原 , P 原 is the water pressure value before the sudden drop in water pressure; 30%×P1<ΔP 热补max <50%×P1, 10%×P1<ΔP 热补min <20%×P1; 10%×P1<ΔP 冷补max <15%×P1,2%<ΔP 冷补min <5%.

[0043] Optionally, ΔI 增 Obtain the value as follows:

[0044] When ΔP 降 ≥ΔP 降maxWhen ΔI 增 =ΔI 增max ;

[0045] When ΔP 降 <ΔP 降max When ΔI 增 =ΔI 增min +(ΔI 增max -ΔI 增min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min );

[0046] Among them, ΔI 增max is the maximum incremental current, ΔI 增min is the minimum incremental current.

[0047] Optionally, determining whether to use more water to turn on the hot water in S7 includes the following steps:

[0048] Within the first preset time t1, if ΔP 降 >ΔP 设 , and ΔL 增 >ΔL 设1 , it is judged that more water is used to open the hot water, where ΔP 降 is the actual water pressure drop amplitude; ΔP 设 is the preset water pressure drop value, ΔL 增 is the sudden increase in water volume, ΔL 设1 The preset water volume increases suddenly, 2s<t1<5s, 10%×P 原 <ΔP 设 <30%×P 原 , P 原 The water pressure value before the sudden drop in water pressure, 5% × L 原1 <ΔL 设1 <30%×L 原1 , L 原1 It is the water flow value before the sudden increase in water volume.

[0049] Optionally, determining whether to use more water to turn on cold water in S8 includes the following steps:

[0050] Within the second preset time t2, if ΔP 降 >ΔP 设 , and ΔL 降 >ΔL 设2 , it is judged that more water is used to open the hot water, where ΔP 降 is the actual water pressure drop amplitude, ΔP is set to the preset water pressure drop value, ΔL 降 is the sudden drop in water volume, ΔL 设2is the preset water volume sudden drop value, 2s<t2<5s, 10%×P 原 <ΔP 设 <30%×P 原 , P 原 The water pressure value before the sudden drop in water pressure, 5% × L 原2 <ΔL 设2 <30%×L 原2 , L 原2 It is the water flow value before the sudden drop in water volume.

[0051] Optionally, determining whether to turn off water at multiple water points in S104 includes the following steps:

[0052] Within the third preset time t3, if ΔP 增 >ΔP 设 , it is judged that the water is shut off at multiple water points, where ΔP 增 is the actual water pressure surge, ΔP 设 The preset water pressure drop value is 10% × P 原 <ΔP 设 <30%×P 原 , P 原 It is the water pressure value before the sudden drop in water pressure, 2s<t3<5s.

[0053] Optionally, the following steps are further included between S103 and S104:

[0054] Determine whether L1>L 开机 If yes, go to S104, if no, return to S1.

[0055] On the other hand, the present invention provides a gas water heater, including a hot water pipe, a heat exchanger, a first temperature sensor, a second temperature sensor, a water pump, a flow sensor, and a water pressure sensor. The hot water pipe passes through the heat exchanger, the first temperature sensor is installed at the water inlet end of the hot water pipe, the second temperature sensor is installed at the water outlet end of the hot water pipe, the water pump, the flow sensor, and the water pressure sensor are all installed on the hot water pipe, and the gas water heater is operated using the above-mentioned gas water heater operation method.

[0056] Optionally, the water pump and the flow sensor are both installed at the water inlet end of the hot water pipe, and the water pressure sensor is installed at the water outlet end of the hot water pipe.

[0057] Compared with the prior art, the present invention has at least the following beneficial effects:

[0058] The operating method of the gas water heater provided by the present invention determines whether there are multiple water points for turning on hot water or multiple water points for turning on cold water, and then turns on the water pump to adjust the water flow and water pressure so that the water flow and water pressure can meet the needs of turning on hot water or multiple water points for turning on cold water, and adjusts the water pump working current I1 so that the actual water flow L1 is less than the maximum heating water flow Lmax of the rated load of the gas water heater, thereby reducing the problem of insufficient hot water temperature caused by L1 being greater than Lmax. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is an operation step diagram of a gas water heater provided by a specific embodiment of the present invention;

[0060] Figure 2 It is an operation step diagram of a gas water heater provided by a specific embodiment of the present invention when operating in an intelligent boosting mode;

[0061] Figure 3 is the target pressure increase amplitude ΔP of the gas water heater provided in the specific embodiment of the present invention 目标 The actual water pressure drop amplitude ΔP 降 Relationship diagram;

[0062] Figure 4 The water pump increasing current and the sudden drop amplitude of water pressure ΔP of the gas water heater provided by the specific embodiment of the present invention 降 Relationship diagram;

[0063] Figure 5 It is a schematic diagram of the structure of a gas water heater provided in a specific embodiment of the present invention.

[0064] In the figure:

[0065] 1. Heat exchanger; 2. Hot water pipe; 3. Flow sensor; 4. Water pump; 5. First temperature sensor; 6. Second temperature sensor; 7. Water pressure sensor; 8. Display operation panel; 9. Control panel. DETAILED DESCRIPTION

[0066] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0067] Please refer to Figure 1 and Figure 2 The present invention provides an operating method of a gas water heater, comprising the following steps:

[0068] S1: water heater standby;

[0069] S2: Determine whether the intelligent boost function is selected. If yes, go to S3; if no, return to S1;

[0070] S3: Enter intelligent boost standby mode;

[0071] S4: Determine whether L1>L 开机 , if yes, go to S5, if no, return to S3;

[0072] S5: Turn on the ignition, and calculate the maximum heating water flow Lmax of the rated load of the gas water heater according to the water inlet temperature T1 and the preset water outlet temperature T2;

[0073] S6: Enter normal shower mode;

[0074] S7: Determine whether to use more water to turn on the hot water, if so, go to S10, if not, go to S8;

[0075] S8: Determine whether to use more water to turn on the cold water, if so, go to S10, if not, go to S9;

[0076] S9: Determine whether L1>L 开机 , if yes, return to S6, if no, return to S3;

[0077] S10: Run the intelligent boost mode;

[0078] S10 includes the following steps:

[0079] S101: The water pump operates according to the initial working current I 初 start up;

[0080] S102: Adjust the water pump operating current I1 so that L1 < Lmax;

[0081] S103: Maintain the current working condition;

[0082] S104: Determine whether to turn off the water at the multiple water points. If so, turn off the water pump, exit the intelligent boost mode and enter S106. If not, directly enter S107.

[0083] S106: Determine whether L1>L 开机 , if yes, return to S6, if no, return to S1;

[0084] S107: Determine whether L1>L 开机 If yes, then return to S103, if no, then return to S1;

[0085] Among them, L1 is the actual water flow, L 开机 is the preset startup water flow, 30%×Imax<I 初<60%×Imax, Imax is the maximum working current of the water pump.

[0086] The operating method of the gas water heater provided by the present invention determines whether there are multiple water points for turning on hot water or multiple water points for turning on cold water, and then turns on the water pump to adjust the water flow and water pressure so that the water flow and water pressure can meet the needs of turning on hot water or multiple water points for turning on cold water, and adjusts the water pump working current I1 so that the actual water flow L1 is less than the maximum heating water flow Lmax of the rated load of the gas water heater, thereby reducing the problem of insufficient hot water temperature caused by L1 being greater than Lmax.

[0087] Optionally, S6 includes the following steps: adjusting the fire power according to T1, T2 and L1 until the actual water outlet temperature T3 is equal to the preset water outlet temperature T2, thereby meeting the normal shower requirements.

[0088] Optionally, in S7, if it is determined that more water is used and hot water is turned on, the following steps are further included before entering S10:

[0089] Determine whether L1>Lmax. If so, it means that there is no need to turn on the water pump and the current shower mode can be maintained. In this case, the water flow rate can be reduced by setting a flow valve. If not, enter S10.

[0090] Optionally, in S8, if it is determined that more water is used and cold water is turned on, the following steps are further included before entering S10:

[0091] Determine whether L1>Lmax. If so, it means that there is no need to turn on the water pump and the current shower mode can be maintained. In this case, the water flow rate can be reduced by setting a flow valve. If not, enter S10.

[0092] Optionally, S102 includes the following steps:

[0093] S1021: Determine whether L1>Lmax, if yes, proceed to S1022, if no, proceed to S1025;

[0094] S1022: The water pump operating current I1 decreases by ΔI 减 ;

[0095] S1023: Determine whether I1=Imin, if so, proceed to S1028, if not, proceed to S1024;

[0096] S1024: Determine whether L1>Lmax. If so, return to S1022. If not, enter S1028 to reduce L1 by reducing the working current I1 of the water pump, so that the outlet water temperature can reach the preset temperature to ensure the comfort of the bathing water temperature;

[0097] S1025: Determine whether P1>P 目标 If yes, then go to S1028, if no, then go to S1026:

[0098] S1026: Water pump operating current I1 increases by ΔI 增 ;

[0099] S1027: Determine whether I1=Imax. If so, enter S1028. If not, return to S1021 to increase the working current I1 of the water pump to increase the water pressure at the water outlet of the whole machine, so that the water flow before and after the original hot water faucet is basically the same, and solve the problem of sudden drop in water temperature when turning on cold water and hot water at multiple water points (especially when hot water and cold water are mixed);

[0100] S1028: Adjust firepower according to T1, T2 and L1;

[0101] S1029: Determine whether T3 = T2. If so, maintain the current working condition and then enter S104. If not, return to S1028.

[0102] Among them, ΔI 减 is the decreasing current, ΔI 增 is the increasing current, P 目标 is the preset target water pressure, P1 is the actual water pressure, Imin is the minimum operating current of the water pump, Imax is the maximum operating current of the water pump, 5%×I 原 <ΔI 减 <10%×I 原 , I 原 is the working current of the water pump before the change, ΔI 减 <ΔI 增 , due to the target boost compensation amplitude ΔP when hot water is turned on at multiple water points 目标 Much larger than the target boost compensation amplitude ΔP when turning on cold water at the water point with more water consumption 目标 Therefore, a larger incremental current ΔI is matched when hot water is turned on at multiple water points 增 , which helps to speed up the recovery of water flow and shorten the time of boost compensation.

[0103] Optionally, P 目标 =P1×ΔP 目标 , please refer to Figure 3 According to multiple tests, the target pressure compensation amplitude ΔP 目标 The sudden drop in water pressure ΔP caused by turning on hot water or cold water at a water point with more water consumption 降 In a linear increasing relationship, when S7 judges that the hot water is turned on at a point where more water is used, ΔP 目标 Obtain the value as follows:

[0104] When ΔP 降 ≥ΔP降max When ΔP 目标 =ΔP 热补max ;

[0105] When ΔP 降 <ΔP 降max When ΔP 目标 =ΔP 热补min +(ΔP 热补max -ΔP 热补min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min );

[0106] When it is judged in S7 that the water consumption is too high, turn on the cold water, ΔP 目标 Obtain the value as follows:

[0107] When ΔP 降 ≥ΔP 降max When ΔP 目标 =ΔP 冷补max ;

[0108] When ΔP 降 <ΔP 降max When ΔP 目标 =ΔP 冷补min +(ΔP 冷补max -ΔP 冷补min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min );

[0109] Among them, ΔP 目标 is the target boost compensation amplitude; ΔP 降 is the actual water pressure drop amplitude, ΔP 降max is the preset maximum water pressure drop amplitude, ΔP 热补max The preset maximum pressure increase compensation amplitude when hot water is turned on at multiple water points, ΔP 冷补max The preset maximum pressure increase compensation amplitude when turning on cold water at multiple water points, ΔP 降min is the preset minimum water pressure drop amplitude, ΔP 热补min The preset minimum pressure increase compensation amplitude when hot water is turned on at multiple water points, ΔP 冷补min The preset minimum pressure increase compensation amplitude when turning on cold water at the multi-water point, 30%<ΔP 降max <50%,ΔP 降min =ΔP 设 ; ΔP 设 The preset water pressure drop value is 10% × P 原 <ΔP 设 <30%×P 原, P 原 The water pressure value before the sudden drop in water pressure; 30%×P1<ΔP 热补max <50%×P1, 10%×P1<ΔP 热补min <20%×P1;10%×P1<

[0110] ΔP 冷补max <15%×P1,2%×P1<ΔP 冷补min <5%×P1.

[0111] In this embodiment, the target pressure increase compensation amplitude ΔP when the hot water is turned on at the multiple water points 目标 Much larger than the target boost compensation amplitude ΔP when turning on cold water at the water point with more water consumption 目标 The reason is that when the hot water is turned on at the multiple water points, the water flow at the original water point suddenly drops by ΔP 降 Much larger than the sudden drop ΔP caused by turning on the cold water at the water point with more water 降 .

[0112] Please refer to Figure 4 According to multiple tests, when in intelligent boost mode, the increasing current ΔI of the water pump 增 The water pressure drop amplitude ΔP caused by turning on cold water at the water point with more water consumption and turning on hot water at the water point with more water consumption is linearly increasing. 增 Obtain the value as follows:

[0113] When ΔP 降 ≥ΔP 降max When ΔI 增 =ΔI 增max ;

[0114] When ΔP 降 <ΔP 降max When ΔI 增 =ΔI 增min +(ΔI 增max -ΔI 增min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min );

[0115] Among them, ΔI 增max is the maximum incremental current, ΔI 增min is the minimum incremental current.

[0116] Optionally, determining whether to use more water to turn on the hot water in S7 includes the following steps:

[0117] Within the first preset time t1, if ΔP 降 >ΔP 设 , and ΔL 增 >ΔL设1 , it is judged that more water is used to open the hot water, where ΔP 降 is the actual water pressure drop amplitude; ΔP 设 is the preset water pressure drop value, ΔL 增 is the sudden increase in water volume, ΔL 设1 The preset water volume increases suddenly, 2s<t1<5s, 10%×P 原 <ΔP 设 <30%×P 原 , P 原 The water pressure value before the sudden drop in water pressure, 5% × L 原1 <ΔL 设1 <30%×L 原1 , L 原 It is the water flow value before the sudden increase in water volume.

[0118] Optionally, determining whether to use more water to turn on cold water in S8 includes the following steps:

[0119] Within the second preset time t2, if ΔP 降 >ΔP 设 , and ΔL 降 >ΔL 设2 , it is judged that the water point is used more frequently to open the hot water, where ΔP is the actual water pressure drop amplitude, ΔP is set to the preset water pressure drop value, ΔL 降 is the sudden drop in water volume, ΔL 设2 is the preset water volume sudden drop value, 2s<t2<5s, 10%×P 原 <ΔP 设 <30%×P 原 , P 原 The water pressure value before the sudden drop in water pressure, 5% × L 原2 <ΔL 设2 <30%×L 原2 , L 原2 It is the water flow value before the sudden drop in water volume.

[0120] Optionally, determining whether to turn off water at multiple water points in S104 includes the following steps:

[0121] Within the third preset time t3, if ΔP 增 >ΔP 设 , it is judged that the water is shut off at multiple water points, where ΔP 增 is the actual water pressure surge, ΔP 设 The preset water pressure drop value is 10% × P 原 <ΔP 设 <30%×P 原 , P 原 It is the water pressure value before the sudden drop in water pressure, 2s<t3<5s.

[0122] It should be noted that according to the pipeline water flow calculation formula: Q 2 =ΔP / R, where ΔP is the difference between the tap water pressure (constant) and the tap outlet pressure (relative pressure is zero). When more water points are used to open hot water and more water points are used to open cold water, the outlet area is nearly doubled, and the pipe water resistance R is halved. It is calculated that the total water flow rate increases by about 40%, while the water volume at the original water point decreases by about 30%. Therefore, ΔP is determined. 设 The value is 10% × P 原 Up to 30% × P 原 According to the experimental results of turning on cold water and hot water at multiple water points with different water pressures and faucet openings, if multiple hot water points are used, the sudden increase in the total water volume flowing through the gas water heater is greater than 15%, the sudden drop in the water volume at the original water point is greater than 10%, and the sudden drop in water pressure at the water pressure sensor is greater than 20%, and the sudden drop in water volume at the original water point is proportional to the sudden drop in water pressure; if multiple cold water points are used, the sudden drop in the total water volume flowing through the gas water heater and the water volume at the original water point is less than 15%, and the sudden drop in water pressure at the water pressure sensor is greater than 10%, and the sudden drop in water volume at the original water point is proportional to the sudden drop in water pressure, so it is determined that ΔL 设1 The value range is 5% × L 原1 Up to 30% × L 原1 , ΔL 设2 The value range is 5% × L 原2 To <30% × L 原2 .

[0123] Optionally, the following steps are further included between S103 and S104:

[0124] Determine whether L1>L 开机 If yes, go to S104, if no, return to S1.

[0125] Please refer to Figure 5 On the other hand, the present invention provides a gas water heater, including a hot water pipe 2, a heat exchanger 1, a first temperature sensor 5, a second temperature sensor 6, a water pump 4, a flow sensor 3, and a water pressure sensor 7. The hot water pipe 2 passes through the heat exchanger 1. The first temperature sensor 5 is installed at the water inlet end of the hot water pipe 2 to detect the water inlet temperature T1 of the gas water heater. The second temperature sensor 6 is installed at the water outlet end of the hot water pipe 2 to detect the actual water outlet temperature T3 of the gas water heater. The water pump 4, the flow sensor 3 and the water pressure sensor 7 are all installed on the hot water pipe 2. The water pump 4 is used for pressurization. The water pressure sensor 7 is used to detect the actual water pressure P1 of the water heater. The gas water heater is operated using the above-mentioned gas water heater operation method.

[0126] Optionally, the flow sensor 3 and the water pressure sensor 7 are both installed at the water inlet end of the hot water pipe 2, and the water pressure sensor 7 is installed at the water outlet end of the hot water pipe 2, so as to improve the detection accuracy of P1.

[0127] Optionally, a display operation panel 8 is also included, and the user can choose whether to turn on the intelligent boost mode through the display operation panel 8.

[0128] Optionally, a control panel 9 is further included, and the control panel 9 is communicatively connected with the heat exchanger 1, the first temperature sensor 5, the second temperature sensor 6, the water pump 4, the flow sensor 3, the water pressure sensor 7, and the display operation panel.

[0129] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for operating a gas water heater, characterized in that: The following steps are involved: S1: water heater standby; S2: Determine whether the intelligent boost function is selected. If yes, go to S3; if no, return to S1; S3: Enter intelligent boost standby mode; S4: Determine whether L1>L 开机 , if yes, go to S5, if no, return to S3; S5: Turn on the ignition, and calculate the maximum heating water flow Lmax of the rated load of the gas water heater according to the water inlet temperature T1 and the preset water outlet temperature T2; S6: Enter normal shower mode; S7: Determine whether to use more water to turn on the hot water, if so, go to S10, if not, go to S8; S8: Determine whether to use more water to turn on the cold water, if so, go to S10, if not, go to S9; S9: Determine whether L1>L 开机 , if yes, return to S6, if no, return to S3; S10: Run the intelligent boost mode; S10 includes the following steps: S101: The water pump operates according to the initial working current I 初 start up; S102: Adjust the water pump operating current I1 so that L1 < Lmax; S103: Maintain the current working condition; S104: Determine whether to turn off the water at the multiple water points. If so, turn off the water pump, exit the intelligent boost mode and enter S106. If not, directly enter S107. S106: Determine whether L1>L 开机 , if yes, return to S6, if no, return to S1; S107: Determine whether L1>L 开机 If yes, then return to S103, if no, then return to S1; Among them, L1 is the actual water flow, L 开机 is the preset startup water flow, 30%×Imax<I 初 <60%×Imax, Imax is the maximum working current of the water pump.

2. The operating method of the gas water heater according to claim 1, characterized in that: S102 includes the following steps: S1021: Determine whether L1>Lmax, if yes, proceed to S1022, if no, proceed to S1025; S1022: The water pump operating current I1 decreases by ΔI 减 ; S1023: Determine whether I1=Imin, if so, proceed to S1028, if not, proceed to S1024; S1024: Determine whether L1>Lmax, if so, return to S1022, if not, go to S1028; S1025: Determine whether P1>Ptarget, if yes, proceed to S1028, if no, proceed to S1026: S1026: Water pump operating current I1 increases by ΔI 增 ; S1027: Determine whether I1=Imax, if so, proceed to S1028, if not, return to S1021; S1028: Adjust firepower according to T1, T2 and L1; S1029: Determine whether T3 = T2. If so, maintain the current working condition and then enter S104. If not, return to S1028. Among them, ΔI 减 is the decreasing current, ΔI 增 is the increasing current, P 目标 is the preset target water pressure, P1 is the actual water pressure, Imin is the minimum operating current of the water pump, Imax is the maximum operating current of the water pump, 5%×I 原 <ΔI 减 <10%×I 原 , I 原 is the working current of the water pump before the change, ΔI 减 <ΔI 增 , T3 is the actual outlet water temperature.

3. The operating method of the gas water heater according to claim 2, characterized in that: P 目标 =P1×ΔP 目标 , when it is judged in S7 that more water is used, the hot water is turned on, ΔP 目标 Obtain the value as follows: When ΔP 降 ≥ΔP 降max When ΔP 目标 =ΔP 热补max ; When ΔP 降 <ΔP 降max , ΔP 目标 = ΔP 热补min + (ΔP 热补max - ΔP 热补min ) × (ΔP 降 - ΔP 降min ) / (ΔP 降max - ΔP 降min ); When it is judged in S7 that the water consumption is too high, turn on the cold water, ΔP 目标 Obtain the value as follows: When ΔP 降 ≥ΔP 降max When ΔP 目标 =ΔP 冷补max ; When ΔP 降 <ΔP 降max When, ΔP 目标 = ΔP 冷补min +(ΔP 冷补max - ΔP 冷补min ) × (ΔP 降 - ΔP 降min ) / (ΔP 降max - ΔP 降min ); Among them, ΔP 目标 is the target boost compensation amplitude; ΔP 降 is the actual water pressure drop amplitude, ΔP 降max is the preset maximum water pressure drop amplitude, ΔP 热补max The preset maximum pressure increase compensation amplitude when hot water is turned on at multiple water points, ΔP 冷补max The preset maximum pressure increase compensation amplitude when turning on cold water at the multi-water point, ΔP 降min is the preset minimum water pressure drop amplitude, ΔP 热补min The preset minimum pressure increase compensation amplitude when hot water is turned on at multiple water-using points, ΔP 冷补min The preset minimum pressure increase compensation amplitude when turning on cold water at a multi-water point; 30%×P1<ΔP 降max <50%×P1,ΔP 降min =ΔP 设 ; ΔP 设 The preset water pressure drop value is 10% × P 原 <ΔP 设 <30%×P 原 , P 原 is the water pressure value before the sudden drop in water pressure; 30%×P1<ΔP 热补max <50%×P1, 10%×P1<ΔP 热补min <20%×P1; 10%×P1<ΔP 冷补max <15%×P1,2%×P1<ΔP 冷补min <5%×P1.

4. The operating method of the gas water heater according to claim 3, characterized in that: ΔI 增 Obtain the value as follows: When ΔP 降 ≥ΔP 降max When ΔI 增 =ΔI 增max ; When ΔP 降 <ΔP 降max When, ΔI 增 =ΔI 增min +(ΔI 增max -ΔI 增min )×(ΔP 降 -ΔP 降min ) / (ΔP 降max -ΔP 降min ); Among them, ΔI 增max is the maximum incremental current, ΔI 增min is the minimum incremental current.

5. The operating method of the gas water heater according to any one of claims 1 to 4, characterized in that: The determination in S7 whether to use more water to turn on the hot water includes the following steps: Within the first preset time t1, if ΔP 降 >ΔP 设 , and ΔL 增 >ΔL 设1 , it is judged that more water is used to open the hot water, where ΔP 降 is the actual water pressure drop amplitude; ΔP 设 is the preset water pressure drop value, ΔL 增 is the sudden increase in water volume, ΔL 设1 The preset water volume increases suddenly, 2s<t1<5s, 10%×P 原 <ΔP 设 <30%×P 原 , P 原 The water pressure value before the sudden drop in water pressure, 5% × L 原1 <ΔL 设1 <30%×L 原1 , L 原1 It is the water flow value before the sudden increase in water volume.

6. The operating method of the gas water heater according to any one of claims 1 to 4, characterized in that: The determination in S8 whether to use more water to turn on the cold water includes the following steps: Within the second preset time t2, if ΔP 降 >ΔP 设 , and ΔL 降 >ΔL 设2 , it is judged that the water point is used more frequently to open the hot water, where ΔP is the actual water pressure drop amplitude, ΔP is set to the preset water pressure drop value, ΔL 降 is the sudden drop in water volume, ΔL 设2 is the preset water volume sudden drop value, 2s<t2<5s, 10%×P 原 <ΔP 设 <30%×P 原 , P 原 The water pressure value before the sudden drop in water pressure, 5% × L 原2 <ΔL 设2 <30%×L 原2 , L 原2 It is the water flow value before the sudden drop in water volume.

7. The operating method of the gas water heater according to any one of claims 1 to 4, characterized in that: Determining whether to turn off water at a water point that uses more water in S104 includes the following steps: Within the third preset time t3, if ΔP 增 >ΔP 设 , it is judged that the water is shut off at multiple water points, where ΔP 增 is the actual water pressure surge, ΔP 设 The preset water pressure drop value is 10% × P 原 <ΔP 设 <30%×P 原 , P 原 It is the water pressure value before the sudden drop in water pressure, 2s<t3<5s.

8. The operating method of the gas water heater according to any one of claims 1 to 4, characterized in that: The following steps are also included between S103 and S104: Determine whether L1>L 开机 If yes, go to S104, if no, return to S1.

9. A gas water heater, comprising a hot water pipe (2), a heat exchanger (1), a first temperature sensor (5), a second temperature sensor (6), a water pump (4), a flow sensor (3), and a water pressure sensor (7), wherein the hot water pipe (2) passes through the heat exchanger (1), the first temperature detector (5) is installed at the water inlet end of the hot water pipe (2), the second temperature sensor (6) is installed at the water outlet end of the hot water pipe (2), the water pump (4), the flow sensor (3) and the water pressure sensor (7) are all installed on the hot water pipe, characterized in that: The gas water heater is operated by the operating method of the gas water heater according to any one of claims 1-8.

10. The gas water heater according to claim 9, characterized in that: The water pump (4) and the flow sensor (3) are both installed at the water inlet end of the hot water pipe, and the water pressure sensor (7) is installed at the water outlet end of the hot water pipe (2).

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