Heating method of water heater and water heater

Abstract

The invention relates to the technical field of household appliances, and discloses a water heater heating method and a water heater. The instant water heater integrates the instant heating function and the water storage function, the instant heating function is achieved in a double-container water storage mode, the problems that an instant water heater is overloaded due to too large power, the water inlet temperature is too low and the water temperature is not enough are solved, and the problems that a water storage water heater is long in preheating time and too high in energy consumption are solved. The dynamic water using mode or the static water using mode is automatically selected by judging the water flow, in the dynamic water using mode, whether normal temperature sensor values of the first liner body and the second liner body and the water flow meet preset conditions or not is judged, and the first liner body and the second liner body are independently heated or heated at the same time; the temperature rise speed of the water temperature in the first inner container and the temperature rise speed of the water temperature in the second inner container are basically consistent, heating can be conducted within a short time, the electric energy utilization rate is high, and the hot water output amount of the water heater is increased.

Description

Technical Field

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

[0002] Common electric water heaters are roughly divided into two types: large tank storage type and direct heating type. Storage type electric water heaters are equipped with a water tank, and the heater keeps the water in the tank warm and heats it for a long time. They are large in size, consume a lot of power, and have low energy efficiency. Direct heating electric water heaters eliminate the water tank and use a high-power heater, which heats up quickly and has high energy efficiency. However, such high power puts a great burden on the power supply circuit of ordinary households and is prone to tripping. Summary of the invention

[0003] Based on the above problems, the purpose of the present invention is to provide a water heater heating method and a water heater, which can take into account both instant heating and water storage functions in one, so as to solve the problem that the instant water heater may be overloaded due to excessive power and the water temperature is insufficient due to too low water inlet temperature, and solve the problem of long preheating time and high energy consumption of water storage water heaters.

[0004] In order to achieve the above objectives, the following technical solutions are provided:

[0005] In a first aspect, the present invention provides a water heater heating method, wherein the water heater comprises a first body and a second body, and the water heater heating method comprises the following steps: selecting a dynamic water use mode or a static water use mode by judging a water flow rate, in the dynamic water use mode, judging whether the values ​​of the normal temperature sensors of the first body and the second body and the water flow rate meet preset conditions, and independently heating the first body and the second body or heating the first body and the second body simultaneously so that the temperature rise rate of the water temperature in the first body and the second body is consistent.

[0006] As an optional solution of the water heater heating method provided by the present invention, when the water flow rate is greater than or equal to the first preset water flow rate and lasts for the first preset time, the dynamic water use mode is entered;

[0007] When R1≥TS+T1, R2<Min(TS, T2) and A≥B×Flu×(TS-R1) / 60, the second bile body is heated independently;

[0008] When R1<TS+T1, R2<Min(TS, T2) and A≥B×Flu×(TS-R1) / 60, the first bile body and the second bile body are heated simultaneously;

[0009] When R2<Min(TS, T2) and A<B×Flu×(TS-R1) / 60, the second bile body is heated independently;

[0010] Among them, R1 is the normal temperature sensor value of the first body, R2 is the normal temperature sensor value of the second body, T1 is the first set temperature value, T2 is the second set temperature value, TS is the set temperature value of the whole machine, Flu is the water flow value per minute, A is the target constant value, and B is the weighting coefficient value.

[0011] As an optional scheme of the water heater heating method provided by the present invention, when R1≥TS+T1 and R2>Min(TS+T3, Tmax), neither the first gallbladder body nor the second gallbladder body is heated, wherein T3 is the third set temperature value and Tmax is the maximum set temperature value of the whole machine.

[0012] As an optional solution of the water heater heating method provided by the present invention, when R1<TS+T1 and R2>Min(TS+T3, Tmax), the first tank body is heated independently, wherein T3 is the third set temperature value and Tmax is the highest set temperature value of the whole machine.

[0013] As an optional solution of the water heater heating method provided by the present invention, when R1≥TS+T1 and Min(TS, T2)≤R2≤Min(TS+T3, Tmax), the second tank body is heated independently, wherein T3 is the third set temperature value and Tmax is the maximum set temperature value of the whole machine.

[0014] As an optional scheme of the water heater heating method provided by the present invention, when R1<TS+T1 and Min(TS, T2)≤R2≤Min(TS+T3, Tmax), the first gallbladder body and the second gallbladder body are heated simultaneously, wherein T3 is the third set temperature value and Tmax is the maximum set temperature value of the whole machine.

[0015] As an optional solution of the water heater heating method provided by the present invention, when calculating B×Flu×(TS-R1) / 60, when Ts-R1≤0, it is calculated as 0; when judging the size of B×Flu×(TS-R1) / 60 and A, it is judged every 30 seconds.

[0016] As an optional solution of the water heater heating method provided by the present invention, when the temperature switches from low temperature to high temperature, the switching point has a hysteresis of 5°C; when the temperature switches from high temperature to low temperature, the switching point has no hysteresis.

[0017] As an optional solution of the water heater heating method provided by the present invention, when the water flow rate is less than the second preset water flow rate, the static water use mode is entered:

[0018] For the first gallbladder, when R1≥TS-T4, no heating is performed;

[0019] When R1<TS-T4, the first bile body is independently heated to TS-T4;

[0020] For the second gallbladder, when R2 ≥ TS, no heating;

[0021] When R2<TS-T5, the second bile body is independently heated to TS-T5, and a second preset time is waited. If R2≥TS within the second preset time, the heating is completed; if R2<TS, the second bile body is independently heated to TS;

[0022] When TS>R2≥TS-T5, the second bile body is independently heated to TS;

[0023] Wherein, T4 is the fourth set temperature value, and T5 is the fifth set temperature value.

[0024] In a second aspect, the present invention further provides a water heater, comprising a controller, a first body and a second body, wherein the controller heats the first body and the second body independently or simultaneously by the water heater heating method as described above.

[0025] The beneficial effects of the present invention are:

[0026] The water heater heating method and the water heater provided by the present invention take into account both instant heating and water storage functions in one, and adopt a double-tank water storage method to realize the instant heating function, which not only solves the problem that the instant water heater may be overloaded due to excessive power and the water temperature is not high due to too low water inlet temperature, but also solves the problem that the storage water heater has a long preheating time and too high energy consumption. By judging the water flow rate, the dynamic water use mode or the static water use mode is automatically selected. In the dynamic water use mode, it is judged whether the normal temperature sensor values ​​of the first tank body and the second tank body and the water flow rate meet the preset conditions, and the first inner tank and the second inner tank are heated independently or simultaneously, so that the basic temperature rise speed of the water temperature in the first inner tank and the second inner tank is consistent, so that heating can be performed in a shorter time, so that the utilization rate of electric energy is high, and the hot water output of the water heater is improved. It has the advantages of fast heating and energy saving of the instant water heater, and the advantage of storing hot water of the storage water heater, and meets the user's hot water needs of a certain temperature and bathing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of the structure of a water heater provided in a specific embodiment of the present invention.

[0029] In the figure:

[0030] 1. Second water outlet pipe; 2. Second temperature measurement position; 3. Third heating body; 4. Second blind pipe; 5. Second body; 6. Second heating body; 7. Second water inlet pipe; 8. First water outlet pipe; 9. First temperature measurement position; 10. First body; 11. First blind pipe; 12. First heating body; 13. First water inlet pipe; 14. Connecting pipe. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] This embodiment provides a water heater heating method, such as Figure 1As shown, the water heater includes a first body 10 and a second body 5. The heating of the first body 10 and the second body 5 can be achieved through a heating body. For example, a first heating body 12 can be provided in the first body 10, and the first body 10 can be heated by the first heating body 12. A second heating body 6 and a third heating body 3 can be provided in the second body 5, and the second body 5 can be heated by the second heating body 6 and the third heating body 3. The first heating body 12 enables the first body 10 to have a heat storage function, the second heating body 6 enables the second body 5 to have a heat storage function, and the third heating body 3 enables the second body 5 to have an instant heating function. When supplying hot water, the hot water of the second body 5 is consumed first, and then the hot water of the first body 10 is consumed. The water heater heating method includes the following steps: selecting a dynamic water use mode or a static water use mode by judging the water flow rate; in the dynamic water use mode, judging whether the normal temperature sensor values ​​of the first body 10 and the second body 5 and the water flow rate meet the preset conditions; heating the first body 10 and the second body 5 independently or simultaneously; for example, two of the first heating body 12, the second heating body 6 and the third heating body 3 can be controlled to be heated simultaneously or one of the heating bodies can be heated, so that the temperature rise rate of the water temperature in the first body 10 and the second body 5 is consistent.

[0035] The water heater heating method combines the two functions of instant heating and water storage in one, and adopts a double-tank water storage method to realize the instant heating function. It not only solves the problem that the instant water heater may be overloaded due to excessive power, the water temperature is not enough due to too low water inlet temperature, but also solves the problem of long preheating time and excessive energy consumption of the water storage water heater. By judging the water flow rate, the dynamic water use mode or the static water use mode is automatically selected. In the dynamic water use mode, it is judged whether the normal temperature sensor values ​​of the first tank body 10 and the second tank body 5 and the water flow rate meet the preset conditions, and the first tank body 10 and the second tank body 5 are heated independently or simultaneously, so that the basic temperature rise rate of the water temperature in the first inner tank and the second inner tank is consistent, and then the heating can be carried out in a shorter time, so that the electric energy utilization rate is high, and the hot water output of the water heater is improved. It has the advantages of fast heating and energy saving of the instant water heater, and the advantage of storing hot water of the water storage heater, which meets the user's hot water needs of a certain temperature and bathing time.

[0036] Optionally, when the water flow rate is greater than or equal to a first preset water flow rate and lasts for a first preset time, the dynamic water use mode is entered; the first preset water flow rate may be 2L of water per minute, and the first preset time may be 10 seconds. When the water consumption is large and lasts for a long time, the dynamic water use mode is adopted to maximize the heating efficiency.

[0037] When R1≥TS+T1, R2<Min(TS, T2) and A≥B×Flu×(TS-R1) / 60, the second body 5 is heated independently, for example, the second heating body 6 is heated; at this time, the first body 10 has sufficient hot water reserves, the second body 5 has insufficient hot water reserves, the dynamic water consumption is small, the first heating body 12 and the third heating body 3 do not need to be heated, and only the second heating body 6 is turned on to meet the user's water demand.

[0038] Among them, R1 is the value of the normal temperature sensor of the first body 10, R2 is the value of the normal temperature sensor of the second body 5, T1 is the first set temperature value, T2 is the second set temperature value, TS is the set temperature value of the whole machine, Flu is the water flow value per minute, A is the target constant value, and B is the weighting coefficient value. R1, R2 and Flu are respectively measured in real time by corresponding sensors, and T1, T2, A and B are all pre-set values ​​summarized from experimental data. According to experiments, T1=2, T2=70, A=4, B=4.2, the heating efficiency is faster and the heating effect is better. It can be understood that Min(TS, T2) refers to the smaller value of TS and T2.

[0039] When R1<TS+T1, R2<Min(TS, T2) and A≥B×Flu×(TS-R1) / 60, the first body 10 and the second body 5 are heated simultaneously, for example, the first heating body 12 and the second heating body 6 are heated simultaneously; as the water use time continues, the hot water reserves of the first body 10 and the second body 5 are insufficient, but since the dynamic water consumption is small, the third heating body 3 does not need to be heated, and only turning on the first heating body 12 and the second heating body 6 can meet the user's water demand.

[0040] When R1<TS+T1, R2<Min(TS, T2) and A<B×Flu×(TS-R1) / 60, the second body 5 is heated independently, for example, the second heating body 6 and the third heating body 3 are heated at the same time; at this time, the hot water reserves of the first body 10 and the second body 5 are insufficient, and the dynamic water consumption is large. The first heating body 12 does not need to be heated, and power needs to be concentrated to heat the water in the second body 5. The high-power and small-volume heating method realizes the timely heating function, and only turning on the second heating body 6 and the third heating body 3 can meet the user's water demand.

[0041] Optionally, when R1≥TS+T1 and R2>Min(TS+T3, Tmax), the first body 10 and the second body 5 are not heated, for example, the first heating body 12, the second heating body 6 and the third heating body 3 are not heated, wherein T3 is the third set temperature value, and Tmax is the highest set temperature value of the whole machine. At this time, the hot water reserves of the first body 10 and the second body 5 are relatively sufficient, and according to the user's water demand, Tmax can be 80°C, and T3=10.

[0042] In some embodiments, when R1<TS+T1 and R2>Min(TS+T3, Tmax), the first body 10 is heated independently, for example, the first heating body 12 is heated. At this time, the hot water reserve of the second body 5 is sufficient, and the hot water reserve of the first body 10 is slightly insufficient. The second heating body 6 and the third heating body 3 do not need to be heated, and only the first heating body 12 is turned on to meet the user's water demand.

[0043] Optionally, when R1≥TS+T1 and Min(TS, T2)≤R2≤Min(TS+T3, Tmax), the second body 5 is heated simultaneously, for example, the second heating body 6 is heated. At this time, the hot water reserve of the first body 10 is sufficient, and the hot water reserve of the second body 5 is slightly insufficient. The first heating body 12 and the third heating body 3 do not need to be heated, and only the second heating body 6 is turned on to meet the user's water demand.

[0044] In some embodiments, when R1<TS+T1 and Min(TS, T2)≤R2≤Min(TS+T3, Tmax), the first body 10 and the second body 5 are heated simultaneously, for example, the first heating body 12 and the second heating body 6 are heated simultaneously. At this time, the hot water reserves of the first body 10 and the second body 5 are slightly insufficient, and the third heating body 3 does not need to be heated. Only turning on the first heating body 12 and the second heating body 6 can meet the user's water demand.

[0045] Optionally, when calculating B×Flu×(TS-R1) / 60, when Ts-R1≤0, it is calculated as 0. In other words, the hot water reserve of the first heating body 10 is sufficient, and the user's water demand can be met without turning on the third heating body 3. To avoid excessive data redundancy, optionally, when judging the size of B×Flu×(TS-R1) / 60 and A, the judgment is made every 30 seconds. To save electricity, optionally, when the temperature switches from low temperature to high temperature, the switching point has a hysteresis of 5°C; when the temperature switches from high temperature to low temperature, the switching point has no hysteresis.

[0046] In some embodiments, when the water flow rate is less than the second preset water flow rate, the dynamic water use mode is not required, and the static water use mode is entered:

[0047] For the first tank body 10, when R1 ≥ TS-T4, no heating is performed; at this time, the hot water reserve of the first tank body 10 is sufficient, and the first heating body 12 does not need to be turned on.

[0048] When R1<TS-T4, the first body 10 is heated independently, for example, the first heating body 12 is turned on and heated to TS-T4; at this time, the hot water reserve of the first body 10 is insufficient, and the water demand of the user can be met by turning on the first heating body 12.

[0049] For the second heater 5, when R2 ≥ TS, no heating is performed; at this time, the hot water reserve of the second heater 5 is sufficient, and the second heating body 6 and the third heating body 3 do not need to be turned on.

[0050] When R2<TS-T5, the second body 5 is heated independently, for example, the third heating body 3 is turned on and heated to TS-T5, and the second preset time is waited. If R2≥TS within the second preset time, the heating is completed; if R2<TS, the third heating body 3 is turned on and heated to TS; at this time, the hot water reserve of the second body 5 is slightly insufficient, and the user's water demand can be met by briefly turning on the third heating body 3.

[0051] When TS>R2≥TS-T5, the second heater 5 is heated independently, for example, the third heater 3 is turned on to heat to TS; at this time, the hot water reserve of the second heater 5 is insufficient, the second heater 6 does not need to be turned on, and only the third heater 3 is turned on to meet the user's water demand.

[0052] Among them, T4 is the fourth set temperature value. Among them, T5 is the fifth set temperature value. According to experiments, the second preset water flow rate can be 1.5L water flow rate per minute, the second preset time can be 3 minutes, T4=2, T5=3, the heating efficiency is faster, and the heating effect is better. In the static water use process, only one heating body needs to be turned on to meet the user's water demand, saving time and electricity.

[0053] It should be noted that in the above logic judgment process, if R2≥85℃, the second heating body 6 and the third heating body 3 are not allowed to be turned on until R2≤80℃, and then re-judgment is made; if R1≥85℃, the first heating body 12 is not allowed to be turned on until R1≤80℃, and then re-judgment is made.

[0054] The water heater heating method provided in the present embodiment combines the two functions of instant heating and water storage in one, adopts a double-tank water storage method and different combinations of three heating bodies to realize the instant heating function, which not only solves the problem that the instant water heater may be overloaded due to excessive power, the water temperature is insufficient due to too low water inlet temperature, but also solves the problem that the storage water heater has a long preheating time and too high energy consumption. By judging the water flow rate, the dynamic water use mode or the static water use mode is automatically selected. In the dynamic water use mode, it is judged whether the normal temperature sensor values ​​of the first tank 10 and the second tank 5 and the water flow rate meet the preset conditions, and the two heating bodies are controlled to heat at the same time, or one heating body is controlled to heat, so that the basic temperature rise rate of the water temperature in the first tank and the second tank is consistent, so that heating can be performed in a shorter time, so that the utilization rate of electric energy is high, and the hot water output of the water heater is improved. It has the advantages of fast heating and energy saving of the instant water heater, and the advantage of storing hot water of the storage water heater, and meets the user's hot water needs of a certain temperature and bathing time.

[0055] This embodiment also provides a water heater, such as Figure 1 As shown, the water heater includes a controller, a first body 10 and a second body 5. A first heating body 12 is arranged in the first body 10, and a second heating body 6 and a third heating body 3 are arranged in the second body 5. The controller controls the first heating body 12, the second heating body 6 and the third heating body 3 to heat by the above-mentioned water heater heating method. The first body 10 and the second body 5 are connected by a connecting pipe 14, and the connecting pipe 14 is located outside the first body 10 and the second body 5. The second heating body 6 and the third heating body 3 are installed in the second body 5. The second water outlet pipe 1, the second blind pipe 4 and the second water inlet pipe 7 are integrated on the second heating body 6 and the third heating body 3, and the second temperature measuring position 2 is located at the top of the second blind pipe 4. The first heating body 12 is installed in the first body 10, the first water outlet pipe 8, the first blind pipe 11 and the first water inlet pipe 13 are integrated on the first heating body 12, and the first temperature measuring position 9 is located at the top of the first blind pipe 11.

[0056] The structural designs of the first heating body 12, the second heating body 6 and the third heating body 3 are all spiral, so that the heating of the whole tank is more uniform. The power of the first heating body 12 and the second heating body 6 are both 3500W, which are used for heat storage; the power of the third heating body 3 is 3500W, which is used for instant heating. The maximum power of the whole machine is 7000W, and the volume is 25L. The small volume and high power can bring a high-quality water experience of heating without waiting and instant hot water. The first heating body 12, the second heating body 6 and the third heating body 3 are used for static heating and dynamic heating logic in different combinations. In the static heating logic, the first tank 10 and the second tank 5 are heated independently, and the second tank 5 is powered off in advance to wait for the first tank 10 to reach the set temperature; in the dynamic heating logic, the first heating body 12, the second heating body 6 and the third heating body 3 are heated in combination, and the heating bodies are combined in pairs to achieve the optimal hot water output and user experience. The third heating body 3 can be replaced by an instant cast aluminum heating body to achieve instant heating, which is not limited here.

[0057] The water heater provided in this embodiment combines the functions of instant heating and water storage in one, adopts a double-tank water storage method and different combinations of three heating bodies to achieve the instant heating function, which not only solves the problem that the instant water heater may be overloaded due to excessive power, the water temperature is not high due to too low water inlet temperature, but also solves the problem that the storage water heater has a long preheating time and too high energy consumption. By judging the water flow rate, the dynamic water use mode or the static water use mode is automatically selected. In the dynamic water use mode, it is judged whether the normal temperature sensor values ​​of the first tank 10 and the second tank 5 and the water flow rate meet the preset conditions, and the two heating bodies are controlled to heat at the same time, or one heating body is controlled to heat, so that the basic temperature rise rate of the water temperature in the first inner tank and the second inner tank is consistent, so that heating can be performed in a shorter time, so that the utilization rate of electric energy is high, and the hot water output of the water heater is improved. It has the advantages of fast heating and energy saving of the instant water heater, and the advantage of storing hot water of the storage water heater, which meets the user's hot water needs of a certain temperature and bathing time.

[0058] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A water heater heating method, characterized in that: The water heater comprises a first body (10) and a second body (5), and the water heater heating method comprises the following steps: selecting a dynamic water use mode or a static water use mode by judging a water flow rate; in the dynamic water use mode, judging whether the values ​​of the normal temperature sensors of the first body (10) and the second body (5) and the water flow rate meet preset conditions; heating the first body (10) and the second body (5) independently or simultaneously, so that the temperature rise rates of the water temperatures in the first body (10) and the second body (5) are consistent.

2. The water heater heating method according to claim 1, characterized in that: When the water flow rate is greater than or equal to the first preset water flow rate and lasts for the first preset time, entering the dynamic water use mode; When R1≥TS+T1, R2<Min(TS, T2) and A≥B×Flu×(TS-R1) / 60, the second bile body (5) is heated independently; When R1<TS+T1, R2<Min(TS, T2) and A≥B×Flu×(TS-R1) / 60, the first bile body (10) and the second bile body (5) are heated simultaneously; When R2<Min(TS, T2) and A<B×Flu×(TS-R1) / 60, the second bile body (5) is heated independently; Among them, R1 is the value of the normal temperature sensor of the first body (10), R2 is the value of the normal temperature sensor of the second body (5), T1 is the first set temperature value, T2 is the second set temperature value, TS is the set temperature value of the whole machine, Flu is the water flow value per minute, A is the target constant value, and B is the weighting coefficient value.

3. The water heater heating method according to claim 2, characterized in that: When R1≥TS+T1 and R2>Min(TS+T3, Tmax), the first gallbladder (10) and the second gallbladder (5) are not heated, wherein T3 is the third set temperature value and Tmax is the maximum set temperature value of the whole machine.

4. The water heater heating method according to claim 2, characterized in that: When R1<TS+T1 and R2>Min(TS+T3, Tmax), the first gallbladder (10) is heated independently, wherein T3 is the third set temperature value and Tmax is the maximum set temperature value of the whole machine.

5. The water heater heating method according to claim 2, characterized in that: When R1≥TS+T1 and Min(TS, T2)≤R2≤Min(TS+T3, Tmax), the second tank body (5) is heated independently, wherein T3 is the third set temperature value and Tmax is the maximum set temperature value of the whole machine.

6. The water heater heating method according to claim 2, characterized in that: When R1<TS+T1 and Min(TS, T2)≤R2≤Min(TS+T3, Tmax), the first gallbladder body (10) and the second gallbladder body (5) are heated simultaneously, wherein T3 is a third set temperature value and Tmax is a maximum set temperature value of the whole machine.

7. The water heater heating method according to claim 2, characterized in that: When calculating B×Flu×(TS-R1) / 60, when Ts-R1≤0, calculate it as 0; when judging the size of B×Flu×(TS-R1) / 60 and A, judge it every 30 seconds.

8. The water heater heating method according to any one of claims 1 to 7, characterized in that: When the temperature switches from low temperature to high temperature, there is a 5°C hysteresis at the switching point; when the temperature switches from high temperature to low temperature, there is no hysteresis at the switching point.

9. The water heater heating method according to any one of claims 1 to 7, characterized in that: When the water flow rate is less than the second preset water flow rate, it enters the static water use mode: For the first gallbladder (10), when R1≥TS-T4, no heating is performed; When R1<TS-T4, the first bile body (10) is independently heated to TS-T4; For the second gallbladder (5), when R2 ≥ TS, no heating is performed; When R2 is less than TS-T5, the second bile body (5) is independently heated to TS-T5, and a second preset time is waited. If R2 is greater than or equal to TS within the second preset time, the heating is completed; if R2 is less than TS, the second bile body (5) is independently heated to TS; When TS>R2≥TS-T5, the second bile body (5) is independently heated to TS; Wherein, T4 is the fourth set temperature value, and T5 is the fifth set temperature value.

10. A water heater, characterized in that It comprises a controller, a first tank body (10) and a second tank body (5), wherein the controller heats the first tank body (10) and the second tank body (5) independently or simultaneously by the water heater heating method according to any one of claims 1 to 9.

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