Water storage type water heater and control method thereof

Abstract

The application discloses a water storage type water heater and a control method thereof. The water storage type water heater comprises: an inner container for storing water; a heating device for heating water in the inner container; a first anode device, which is insulatedly installed with the inner container and electrically connected with the inner container through a first connecting circuit; a detection unit connected to the first connecting circuit or the first anode device or the inner container; and a second anode device, which is a physical anode and is connected to the inner container. The water storage type water heater and the control method thereof can monitor the working condition of the physical anode by using at least one anode device, thereby reliably protecting the inner container.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water heaters, in particular to a storage water heater and a control method thereof. BACKGROUND

[0002] Water heater is one of the modern household life electric appliances, which mainly provides hot water for people to take shower and brings great convenience to people's life. The existing water heaters mainly include gas water heater, solar water heater and storage water heater. The storage water heater mainly includes electric water heater which uses electricity as energy to heat. The electric water heater usually includes a shell, an inner container arranged in the shell and an electric heating device arranged in the inner container, and the electric heating device heats the water in the inner container by being electrified.

[0003] Among them, the inner container for storing water is a key component of the electric water heater. Once the inner container leaks, the electric water heater is scrapped. The reason for the leakage of the inner container is that the steel plate for manufacturing the inner container is corroded to form micro holes. In order to ensure the service life of the inner container, the manufacturer either uses high-priced stainless steel plate to manufacture the inner container or uses ordinary steel plate for enamel coating treatment. However, even so, the corrosion of the inner container is still inevitable.

[0004] For example, for the stainless steel inner container, its corrosion resistance changes with the change of environmental conditions. The corrosion resistance of stainless steel is due to the passivation of steel containing sufficient amount of chromium, which generates a thin and dense passivation film with good adhesion. In the condition of hot water (70-80℃), the passivation film of stainless steel will be destroyed by halogen element ions such as chloride ions in water and become active, resulting in stress corrosion cracking. The part where the passivation film is destroyed becomes anode, and the surrounding becomes cathode, and the anode part will produce pitting corrosion. In addition, there is also the influence of processing and welding stress, which is more likely to cause water leakage at the weld joint.

[0005] For the enamel inner container, although the enamel coating appears to be dense and smooth, there are fine bubbles at the bottom, and these bubbles will be connected to each other. The fish scale-shaped oxide skin and micro holes on the surface of the hot-rolled steel plate will affect the close combination of the coating and the steel plate and may become a place for dirt accumulation. The enamel inner container is inevitably subjected to collision during sintering, handling and assembly, etc., and small or large cracks are generated. In addition, due to the difference in linear expansion coefficient between the enamel coating and the steel, the enamel layer will also produce cracks. These cracks will increase and expand in the cycle of cold and hot alternation. At this time, water molecules that can enter everywhere will corrode the steel plate.

[0006] In order to prevent the inner container from leaking due to corrosion during long-term use, an anode rod is usually installed in the inner container to provide corrosion protection for the inner container. When the anode rod comprises a physical anode, since the working principle of the physical anode is to connect a more active metal with the inner container to form a primary cell in water and generate electrochemical corrosion. In this process, the metal of the physical anode is corroded and consumed instead of the inner container, thereby protecting the inner container. During the working process of the physical anode, the working condition of the physical anode needs to be monitored, so as to reliably protect the inner container. SUMMARY

[0007] The purpose of the present application is to provide a storage water heater and a control method thereof, which can at least monitor the working condition of a physical anode by using one anode device, thereby reliably protecting the inner container.

[0008] The above-mentioned purpose of the present application can be achieved by using the following technical solutions:

[0009] A storage water heater comprises: an inner container for storing water; a heating device for heating water in the inner container; a first anode device, which is insulated from the inner container and electrically connected to the inner container through a first connecting circuit; a detection unit connected to the first connecting circuit or the first anode device or the inner container; and a second anode device, which is a physical anode and is connected to the inner container.

[0010] Further, the storage water heater further comprises a controller electrically connected to the detection unit, the detection unit is used to obtain a first electrical parameter of the first anode device, and the controller can obtain a second electrical parameter of the second anode device based on the obtained first electrical parameter.

[0011] Further, the inner container comprises a first inner container and a second inner container which are in communication with each other, the first anode device is arranged in the first inner container, and the second anode device is arranged in the second inner container.

[0012] Further, the first anode device comprises any one or a combination of the following: an electronic anode and a physical anode.

[0013] Further, the first anode device comprises a physical anode, and the detection unit is arranged on the first connecting circuit.

[0014] Further, the first anode device comprises an electronic anode, and the storage water heater further comprises a power supply device, the power supply device and the detection unit are arranged on the first connecting circuit.

[0015] Further, the storage water heater further comprises a resistance connected in series with the first anode device.

[0016] Further, the first connecting circuit is provided with a first switch, the water storage type water heater is further provided with a second connecting circuit connected in parallel with the first connecting circuit, the second connecting circuit is provided with a second switch, and the resistor is arranged in the first connecting circuit.

[0017] Further, the detection unit is a voltage detection unit configured to acquire a voltage of the resistor, and the controller is capable of determining the current flowing through the first anode device based on the voltage, or the detection unit is a current detection unit configured to acquire the current flowing through the first anode device, or the detection unit is an electric quantity detection unit configured to acquire an electric quantity of the first anode device within a predetermined time length, and the controller is capable of determining the current flowing through the first anode device based on the electric quantity and the predetermined time length.

[0018] Further, the first anode device has an extension direction consistent with an extension direction of the first inner container, and one end of the second anode device extends into the inner container along a height direction and the other end is fixed to a bottom of the second inner container.

[0019] Further, the first inner container and the second inner container are arranged in an up-down manner along the height direction, and the first inner container is located above the second inner container.

[0020] Further, the second anode device is mounted on the second inner container.

[0021] Further, the water storage type water heater further comprises an alarm unit electrically connected with the controller.

[0022] Further, when the first anode device comprises a physical anode, the alarm unit comprises a first alarm unit configured to alarm a service life of the first anode device and a second alarm unit configured to alarm a service life of the second anode device.

[0023] Further, one end of the first anode device is located outside the first inner container and is detachably connected to the first inner container through a connecting mechanism, and an insulating member is arranged between the connecting mechanism and the first inner container.

[0024] Further, the first inner container is a horizontal inner container extending along a first direction, and has opposite first and second end covers along the first direction, the first end cover is configured to mount the first anode device, and one end of the connecting circuit is connected to one end of the first anode device and the other end is connected to the first end cover.

[0025] Further, the water storage type water heater further comprises a first temperature detection member for obtaining the water temperature in the first inner container and a second temperature detection member for obtaining the water temperature in the second inner container, and the first temperature detection member and the second temperature detection member are electrically connected with the controller.

[0026] A control method of a water storage type water heater, the control method comprising:

[0027] obtaining, by the detection unit, a first electrical parameter of the first anode device;

[0028] obtaining, based on the first electrical parameter, a second electrical parameter of the second anode device.

[0029] Further, the control method specifically comprises:

[0030] obtaining a first electrical parameter of the first anode device and a first working condition at the inner container where the first anode device is located, and a second working condition at the inner container where the second anode device is located;

[0031] according to the obtained first working condition and first electrical parameter, calling a first correspondence relationship between the first electrical parameter and the first working condition and a second correspondence relationship between the second electrical parameter and the second working condition;

[0032] determining a proportional coefficient according to the obtained first working condition and second working condition and the first correspondence relationship and the second correspondence relationship;

[0033] determining a current second electrical parameter according to the proportional coefficient and the obtained first electrical parameter.

[0034] Further, the calling of the first correspondence relationship between the first electrical parameter and the first working condition and the second correspondence relationship between the second electrical parameter and the second working condition according to the obtained first working condition and first electrical parameter comprises:

[0035] firstly determining a consumption rate range of the first anode device according to the obtained first working condition and first electrical parameter;

[0036] obtaining the first correspondence relationship between the first electrical parameter and the first working condition and the second correspondence relationship between the second electrical parameter and the second working condition according to the determined consumption rate range.

[0037] Further, the first electrical parameter is a first current, and the second electrical parameter is a second current.

[0038] Further, the first correspondence relationship is I1=f1(T1), and the second correspondence relationship is I2=f2(T2).

[0039] In the above formula, T1 represents a first water temperature, which is detected by a first temperature detection member; T2 represents a second water temperature, which is detected by a second temperature detection member; and the function relationship f1 and the function relationship f2 are one or a combination of multiple of linear relationship, exponential relationship or logarithmic relationship.

[0040] Further, the proportion coefficient a = I2 / I1, the current second current = a x the first current, and the control method further comprises:

[0041] determining the power generated within a predetermined time based on the current second current;

[0042] when the power is greater than a preset power, issuing an alarm signal.

[0043] Further, the control method specifically comprises:

[0044] obtaining a first electrical parameter of the first anode device and a first working condition at a liner of the first anode device and a second working condition at a liner of the second anode device;

[0045] determining a first corresponding relationship between the first electrical parameter and the first working condition according to the obtained first electrical parameter and the first working condition;

[0046] obtaining the current second electrical parameter according to the second working condition and the first corresponding relationship.

[0047] Further, the control method further comprises: correcting the current second electrical parameter to obtain an actual value of the current second electrical parameter.

[0048] Further, the first electrical parameter is a first current, and the second electrical parameter is a second current.

[0049] the first corresponding relationship is I1 = f(T1);

[0050] In the above formula, I1 represents the first current; T1 represents a first water temperature in the first working condition;

[0051] the current actual second current I2 = a x f(T2);

[0052] T2 represents a second water temperature in the second working condition; a is a preset constant or determined by a predetermined manner; I2 represents the current actual second current, and the function relationship f is one or a combination of multiple of linear relationship, exponential relationship or logarithmic relationship.

[0053] Further, the first anode device is a physical anode, and the control method further comprises:

[0054] comparing the first current with a preset current;

[0055] When the first current is less than the preset current, an alarm signal is sent to replace the first anode device.

[0056] Further, the control method further comprises: when the first current is greater than or equal to the preset current, continuously performing the step of comparing the first current with the preset current until the first current is less than the preset current.

[0057] Further, the control method further comprises: before obtaining the first electrical parameter, controlling the heating device to keep powered on for a first time length to polarize the inner container.

[0058] The features and advantages of the present application are:

[0059] In the embodiments of the present application, a water storage type water heater is provided, and the detection unit is used to obtain the first electrical parameter of one of the first anode devices. After the first electrical parameter is obtained by the detection unit, the consumption of the second anode device as the physical anode can be reflected according to the first electrical parameter. Subsequently, the service life of the current physical anode can be determined according to the consumption of the physical anode, so as to remind the user to replace the physical anode in time, so that the inner container can be reliably protected at all times.

[0060] Specific embodiments of the present application are disclosed in detail in the following description and accompanying drawings, indicating the ways in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope by the embodiments described, since the scope of the present application is limited only by the claims.

[0061] Features described and / or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with or in place of features in other embodiments, or in place of or in addition to features in other embodiments.

[0062] It should be emphasized that the term "comprises / comprising" when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0064] Figure 1 is a structural schematic diagram of a first water storage type water heater provided in the embodiments of the present application.

[0065] Figure 2 Fig. 6 is a structural schematic diagram of a second water storage type water heater provided in an embodiment of the present application.

[0066] Figure 3 Fig. 7 is a structural schematic diagram of a third water storage type water heater provided in an embodiment of the present application.

[0067] Figure 4 Fig. 8 is a structural schematic diagram of a fourth water storage type water heater provided in an embodiment of the present application.

[0068] Figure 5 Fig. 9 is a structural schematic diagram of a fifth water storage type water heater provided in an embodiment of the present application.

[0069] Figure 6 Fig. 10 is a structural schematic diagram of a sixth water storage type water heater provided in an embodiment of the present application.

[0070] Figure 7 Fig. 11 is a structural schematic diagram of a seventh water storage type water heater provided in an embodiment of the present application.

[0071] Figure 8 Fig. 12 is a structural schematic diagram of an eighth water storage type water heater provided in an embodiment of the present application.

[0072] Figure 9 Fig. 13 is a step flowchart of a water storage type water heater control method provided in an embodiment of the present application.

[0073] Figure 10 Fig. 14 is a step flowchart of another water storage type water heater control method provided in an embodiment of the present application.

[0074] BRIEF DESCRIPTION OF DRAWINGS

[0075] 1, inner container

[0076] 11, first inner container

[0077] 12, second inner container

[0078] 2, heating device

[0079] 3, detection unit

[0080] 4, first anode device

[0081] 5, second anode device

[0082] 61, first connection circuit

[0083] 62, first switch

[0084] 63, second connection circuit

[0085] 64. a second switch;

[0086] 65. a resistor;

[0087] 71. a water inlet pipe;

[0088] 72. a water outlet pipe;

[0089] 8. a power supply device. DETAILED DESCRIPTION

[0090] In order to make the technical solution in the present application better understood by the person skilled in the art, the technical solution in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0091] It should be noted that when an element is referred to as being "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0092] Unless otherwise defined, all the technical and scientific terms used herein have the same meaning as commonly understood by the person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0093] Please refer to Figures 1 to 8 , Figure 1 is a structural schematic diagram of a first water storage type water heater provided in an embodiment of the present application. In this embodiment, the water storage type water heater can include an inner container 1, and two physical anodes are arranged at different positions of the inner container 1. Figure 2 is a structural schematic diagram of a second water storage type water heater provided in an embodiment of the present application. In this embodiment, the water storage type water heater can include an inner container 1, and two physical anodes and one electronic anode are arranged at different positions of the inner container 1. Figure 3 is a structural schematic diagram of a third water storage type water heater provided in an embodiment of the present application. In this embodiment, the water storage type water heater can include an inner container 1, and one physical anode and one electronic anode are arranged at different positions of the inner container 1.Figure 4 is a structural schematic diagram of a fourth water storage type water heater provided in an embodiment of the present application, in which the water storage type water heater can include two inner containers, each of which is provided with a physical anode; Figure 5 is a structural schematic diagram of a fifth water storage type water heater provided in an embodiment of the present application, in which the water storage type water heater is different from the water storage type water heater shown in Figure 4 mainly in the external connection circuit. Figure 6 is a structural schematic diagram of a sixth water storage type water heater provided in an embodiment of the present application, in which the water storage type water heater is different from the water storage type water heater shown in Figure 4 mainly in the external connection circuit. Figure 7 is a structural schematic diagram of a seventh water storage type water heater provided in an embodiment of the present application, in which the water storage type water heater is different from the water storage type water heater shown in Figure 4 mainly in the external connection circuit. Figure 8 is a structural schematic diagram of an eighth water storage type water heater provided in an embodiment of the present application, in which the water storage type water heater can include two inner containers, one of which is provided with at least one electronic anode and the other of which is provided with a physical anode.

[0094] Overall, the present application provides a water storage type water heater, which can include an inner container for storing water, a heating device 2 for heating water in the inner container, a first anode device 4 which is insulated from the inner container and is electrically connected to the inner container through a first connection circuit 61, a detection unit 3 which is connected to the first connection circuit 61 or the first anode device 4 or the inner container, and a second anode device 5 which is a physical anode and is connected to the inner container.

[0095] In the embodiments of the present application, the water storage type water heater is mainly exemplified by an electric water heater.

[0096] The water storage type water heater mainly includes an inner container, a heating device 2, a first anode device 4, a second anode device 5 and a detection unit 3.

[0097] The inner container can be arranged in a shell of the water heater and is used for storing water. The inner container can be a porcelain inner container or a stainless steel inner container, etc. The water heater can include one inner container, as shown in Figure 1 , Figure 2 and Figure 3 or at least two inner containers, as shown in Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown.

[0098] As shown in Figure 1 , Figure 2 and Figure 3 , when the water heater comprises a liner 1, the liner 1 can be a horizontal liner, i.e. the overall extension direction of the liner 1 is along the horizontal direction after the water heater is installed in place; or the liner 1 can also be a vertical liner, i.e. the overall extension direction of the liner 1 is along the vertical direction after the water heater is installed in place.

[0099] As shown in Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , when the water heater comprises two liners, i.e. a first liner 11 and a second liner 12 which are connected, the first liner 11 and the second liner 12 can be horizontal liners; or the first liner 11 and the second liner 12 can be vertical liners. Taking the first liner 11 and the second liner 12 as horizontal liners as an example, the first liner 11 and the second liner 12 can be arranged in an up-down manner along the height direction, wherein the first liner 11 can be on the top and the second liner 12 can be on the bottom. Of course, the relative position relationship of the first liner 11 and the second liner 12 is not limited to the above example, and in the embodiments of the present specification, the first liner 11 and the second liner 12 are mainly taken as an example to be arranged in an up-down manner.

[0100] Referring to Figures 1 to 8 any one of the drawings, the water heater is further provided with a water inlet pipe 71 and a water outlet pipe 72. The water inlet pipe 71 and the water outlet pipe 72 can be installed on the liner. The water inlet pipe 71 is provided with a water inlet which is arranged close to the bottom of the liner for supplying water to be heated into the bottom of the liner. The water outlet pipe 72 is provided with a water outlet which is arranged close to the top of the liner for outputting the heated water from the top of the liner.

[0101] Referring to Figures 4 to 8 any one of the drawings, when the liner comprises the first liner 11 and the second liner 12, and the first liner 11 and the second liner 12 are arranged in an up-down manner, the water outlet pipe 72 passes through the connecting portion of the first liner 11 and the second liner 12, and the water outlet thereof is located close to the top of the first liner 11, and the water inlet pipe 71 is located in the second liner 12, and the water inlet thereof is arranged close to the bottom of the second liner 12.

[0102] The heating device 2 can be an electric heating element (for example, an electric heating rod) for converting electric energy into heat energy. The electric heating element is in contact with the water in the inner container, and the heat energy generated by the electric heating element is transmitted to the water in the inner container to heat the water in the inner container. One end of the electric heating element is fixed to the inner container, and the other end extends into the water in the inner container. The number of electric heating elements can be one, two, or more. Specifically, the number of electric heating rods can vary depending on the performance parameters (such as power, volume, etc.) of the water storage type water heater and the power parameters of the electric heating rod itself. The present application does not make specific limitations here.

[0103] The second anode device 5 can be a physical anode device (such as a magnesium rod, etc.), which is directly connected to the inner container as a sacrificial anode. In use, it is in contact with the water in the inner container, forming a galvanic cell in the water, replacing the corrosion of the inner container, thereby protecting the inner container. Taking a magnesium rod as an example, when electrochemical corrosion occurs, the active magnesium in the magnesium rod loses electrons, thereby forming an electric current in the water in the inner container.

[0104] Specifically, the number of second anode devices 5 as physical anodes can be one, two, or even more. Specifically, the number of second anode devices 5 can vary depending on their size, performance parameters, service life of the water heater, etc. The present application does not make specific limitations here.

[0105] The first anode device 4 is insulated from the inner container and is electrically connected to the inner container through the first connecting circuit 61, and a connection loop can be formed. Specifically, the connection loop can include the first anode device 4, the first connecting circuit 61, the inner container, and the water in the inner container. The detection unit 3 is connected to the first connecting circuit 61 or the first anode device 4 or the inner container, and is used to detect the electrical signal in the connection loop (including flowing through the first anode device 4). The electrical signal can include current or an equivalent electrical parameter of the current, such as electric quantity, voltage, etc.

[0106] Taking the current obtained by the detection unit 3 as an example, when the current signal is obtained by the detection unit 3, the current consumption of the physical anode can be reflected according to the size of the current. Subsequently, the service life of the physical anode can be determined according to the current consumption of the physical anode, so as to remind the user to replace the physical anode in time, so as to reliably protect the inner container at all times.

[0107] Specifically, the water storage type water heater can further include a controller electrically connected to the detection unit 3, the detection unit 3 being configured to obtain a first electrical parameter of the first anode device 4, and the controller being configured to obtain a second electrical parameter of the second anode device 5 based on the obtained first electrical parameter.

[0108] The first electric parameter of the first anode device 4 acquired by the detection unit 3 can be the current flowing through the first anode device 4, or the electric quantity flowing through the first anode device 4 within a predetermined time, or other parameters equivalent to the current. The second electric parameter can be the current generated by the physical anode in the liner where the physical anode is located, or the electric quantity generated within a predetermined time, or other parameters equivalent to the current.

[0109] The control logic between the first electric parameter and the second electric parameter can be stored in the controller. When the control logic is called, the second electric parameter of the second anode device 5 can be acquired based on the acquired first electric parameter. The second electric parameter can at least determine the consumption of electrons of the current physical anode. Subsequently, the service life of the current physical anode can be determined according to the consumption of electrons of the physical anode, so as to remind the user to replace the physical anode in time, so as to reliably protect the liner at all times.

[0110] Please refer to Figures 4 to 8 In the embodiments of the present application, the embodiments mainly include the first liner 11 and the second liner 12. Other embodiments, such as the embodiment of one liner 1, can refer to the above-mentioned embodiment of two liners, and the present application will not be expanded in detail.

[0111] In some embodiments, the liner includes the first liner 11 and the second liner 12 which are in communication with each other, the first anode device 4 is arranged in the first liner 11, and the second anode device 5 is arranged in the second liner 12.

[0112] Specifically, the other end of the first anode device 4 is located outside the first liner 11 and is detachably connected to the first liner 11 through a connecting mechanism, and an insulating member is arranged between the connecting mechanism and the first liner 11.

[0113] The first anode device 4 can be located in the first inner tank 11 as a whole, wherein one end of the first anode device 4 can be fixed on the first inner tank 11 in a detachable manner and has at least a part extending out of the first inner tank 11 for connecting the first connecting circuit 61. The detachable manner can be screw connection, and can also be snap connection, etc. The detachable manner is not limited to the above example. When the detachable manner is screw connection, the connecting mechanism can be a screw connection mechanism formed between the first inner tank 11 and the first anode device 4. For example, a threaded hole is arranged on the first inner tank 11, and one end of the first anode device 4 is provided with a thread matched with the threaded hole. In order to ensure that the first anode device 4 is insulated and mounted on the first inner tank 11, an insulating piece can be arranged between the connecting mechanism and the first inner tank 11. The insulating piece can be an insulating pad made of insulating material. The specific form, shape, structure and mounting manner of the insulating piece are not limited herein.

[0114] In one embodiment, the extension direction of the first anode device 4 is consistent with the extension direction of the first inner tank 11, and one end of the second anode device 5 extends into the inner tank along the height direction, and the other end is fixed on the bottom of the second inner tank 12.

[0115] In the embodiment, the second anode device 5 is a physical anode, i.e. a sacrificial anode, which needs to be replaced in time after reaching the service life. Considering the installation environment of the storage water heater (usually suspended in a limited space in the bathroom) and the shape and structure of the second anode device 5 (having a certain length and longitudinal structure), when the second anode device 5 is fixed on the bottom wall of the inner tank with the other end extending into the inner tank along the height direction, the second anode device 5 only needs to be pulled out from the bottom for replacement, which is convenient and fast to disassemble and assemble. Specifically, the first inner tank 11 and the second inner tank 12 are arranged in an up-down manner along the height direction, and the first inner tank 11 is located above the second inner tank 12. The second anode device 5 is installed on the second inner tank 12.

[0116] When the first inner tank 11 and the second inner tank 12 are arranged in an up-down manner along the height direction, and the first inner tank 11 is below and the second inner tank 12 is above, considering that the installation environment of the current storage water heater is generally limited, especially that there is no enough operation space in the upper and side parts of the water heater, and relatively, there is a certain operation space in the lower part of the water heater, when the second anode device 5 is installed on the bottom of the second inner tank 12, the second anode device 5 can be directly replaced from the lower part. Of course, in other optional embodiments, the second anode device 5 can also be installed along the length direction of the inner tank.

[0117] In one embodiment, the first inner tank 11 is a horizontal inner tank extending along a first direction, and has opposite first and second end covers along the first direction. The first end cover is used to mount the first anode device 4, and one end of the connecting circuit is connected to one end of the first anode device 4, and the other end is connected to the first end cover.

[0118] In the embodiment, the first inner tank 11 can be a horizontal inner tank, and the first direction is horizontal or close to horizontal after the water storage type water heater is installed. Along the first direction, the first inner tank 11 has opposite first and second end covers. The first end cover is a head cover used to integrally mount various functional components (including the first anode device 4). Since the head cover is centrally provided with various functional components, subsequent maintenance is also concentrated on this end cover. The inner wall of the end cover is not provided with a thermal insulation layer, and the other parts of the inner tank are provided with a thermal insulation layer. When one end of the connecting circuit is connected to the first anode device 4, and the other end is connected to the first end cover, relative to being connected at other positions, on the one hand, the thermal insulation layer can not be damaged, and on the other hand, it is also beneficial to subsequent centralized maintenance on the same end cover.

[0119] The second anode device 5 is a physical anode. The first anode device 4 can specifically include any one or a combination of the following: an electronic anode, a physical anode.

[0120] As shown in Figures 4 to 7 , the first anode device 4 is a physical anode. As shown in Figure 8 , the first anode device 4 includes an electronic anode, and in addition, the first anode device 4 can also be provided with a physical anode. When the first anode device 4 includes a physical anode and an electronic anode, the electronic anode and the physical anode can be distributed in the first inner tank 11 in a staggered manner along the height direction.

[0121] As shown in Figures 4 to 7 , when the first anode device 4 includes a physical anode, the detection unit 3 is arranged on the first connecting circuit 61. When the detection unit 3 is connected to the first connecting circuit 61, the current parameter in the first connecting circuit 61 can be obtained. According to different specific forms of the detection unit 3, the connection mode of the detection unit 3 to the first connecting circuit 61 is also different.

[0122] As shown in Figure 4 , for example, when the detection unit 3 is specifically a current detection unit 3, the detection unit 3 can be connected in series in the first connecting circuit 61, and the current in the first connecting circuit 61 can be directly obtained by using the detection unit 3, that is, the current flowing through the first anode device 4 is obtained.

[0123] AsFigure 5 As shown, the first connecting circuit 61 is provided with a first switch 62, and the water storage type water heater is further provided with a second connecting circuit 63 connected in parallel with the first connecting circuit 61, and the second connecting circuit 63 is provided with a second switch 64. The second connecting circuit 63 can be provided with a resistor 65.

[0124] The first switch 62 and the second switch 64 can be electrically connected with a controller. The controller can control the on-off state of the first switch 62 and the second switch 64. For example, during normal use, the controller can control the first switch 62 to be open and the second switch 64 to be closed, so that the second connecting circuit 63 is in a connected state. Since the second connecting circuit 63 is provided with the resistor 65, the current in the entire circuit is relatively reduced, and under the condition that the number of electrons provided by the second anode device 5 (physical anode) is certain, the service life of the physical anode can be prolonged. When current detection is needed, the controller can control the second switch 64 to be open and the first switch 62 to be closed, so that the first connecting circuit 61 is in a connected state. Since the first connecting circuit 61 is provided with a detection unit 3 (for example, the detection unit 3 can be a current detection unit), the current flowing through the first anode device 4 can be obtained by using the detection unit 3.

[0125] As shown in Figure 6 The first anode device 4 and the inner container are provided with a first connecting circuit 61, and the first connecting circuit 61 is provided with a resistor 65 connected in series with the first anode device 4, that is, the current flowing through the first anode device 4 and the resistor 65 is the same. The detection unit 3 can be a voltage detection unit, and the voltage detection unit 3 is used to obtain the voltage of the resistor 65, and the controller can determine the current flowing through the first anode device 4 based on the voltage. After obtaining the voltage across the resistor 65 by using the detection unit 3, the resistance value of the resistor 65 can be stored in the controller, and the current flowing through the first anode device 4 can be determined by using the obtained voltage and the pre-stored resistance value.

[0126] In addition, the detection unit 3 can be a power detection unit, and the power detection unit is used to obtain the power flowing through the first anode device 4 within a predetermined time, and the controller can determine the current flowing through the first anode device 4 based on the power and the predetermined time. When the detection unit 3 is a power detection unit, it can be connected in series in the first connecting circuit 61. Specifically, the detection principle is similar to that of the current detection unit, and the main difference lies in that the power detection needs to consider the cumulative effect of time on current on the basis of the current detection unit.

[0127] As shown in Figure 7As shown, a first switch 62 is provided on the first connection circuit 61 connecting the first inner tank 11 and the first anode device 4. The storage water heater is also provided with a second connection circuit 63 connected in parallel with the first connection circuit 61, and a second switch 64 is provided on the second connection circuit 63. A resistor 65 may be provided in the second connection circuit 63.

[0128] The first switch 62 and the second switch 64 can be electrically connected to a controller. The controller can control the on / off state of the first switch 62 and the second switch 64.

[0129] For example, when the water quality is good, the second switch 64 is closed, and the second connection circuit 63 is in a connected state. Since the second connection circuit 63 contains a resistor 65, the current in the entire circuit is relatively reduced. On the one hand, given the limited electrons provided by the second anode device 5 (physical anode), this extends the service life of the physical anode; on the other hand, it prevents excessive current in the circuit, thus avoiding over-protection of the inner tank. When the second connection circuit 63 is in a connected state, the resistor can also be used in conjunction with the detection unit 3 to obtain the current flowing through the first anode device 4. Specifically, the detection unit 3 can be a voltage detection unit; however, as described above, the detection unit 3 can also be in other forms, and this application does not impose specific limitations here.

[0130] For example, when the water quality is poor, it may aggravate the corrosion of the inner tank. At this time, the first switch 62 can be closed and the first connection circuit 61 can be connected to ensure that sufficient current is generated in the circuit, thereby reliably protecting the inner tank.

[0131] like Figure 8 As shown, the first anode device 4 may include an electronic anode, and the storage water heater also includes a power supply device 8. The power supply device 8 and the detection unit 3 are disposed on the first connection circuit 61.

[0132] In this embodiment, when the first anode device 4 includes an electronic anode, according to the working principle of the electronic anode, the electronic anode requires an external power supply. Specifically, a power supply device 8 can be connected through the first connection circuit 61 to supply power to the electronic anode. Furthermore, a detection unit 3 is also provided on the first connection circuit 61, which can detect the current flowing through the first connection circuit 61 and the first anode device 4. The detection unit 3 is a current detection unit, used to acquire the current flowing through the first anode device 4.

[0133] Of course, the detection unit 3 can be a voltage detection unit or a power detection unit in addition to the current detection unit. For example, when the detection unit 3 is a voltage detection unit, a resistor 65 can also be arranged on the first connecting circuit 61, and the voltage detection unit can be connected in parallel across the resistor 65. When the detection unit 3 is a power detection unit, the current detection unit is equivalent to the integration of the current detection unit and the timer.

[0134] Further, the water storage type water heater can further include an alarm unit electrically connected to the controller.

[0135] The first electrical parameter obtained by the detection unit 3 can be in the form of current, voltage or power; the second electrical parameter can be in the form of current, voltage or power. In the embodiment, the first electrical parameter is taken as an example in the form of current. After the detection unit 3 obtains the first current flowing through the first anode device 4, the controller can obtain the second current provided by the second anode device 5 according to the first current. According to the second current, the service life of the current second anode device 5 can be judged. Once it is judged based on the second current that the current second current has reached an alarm value, the alarm unit can be started to remind the user to replace the second anode device 5 in time.

[0136] Wherein, the specific form and installation position of the alarm unit are not specifically limited herein. For example, the alarm unit can be integrated on the panel of the water storage type water heater, and a reminding signal can be sent to the user through digital display and / or sound control. In addition, the alarm unit can also be integrated in the APP on the user terminal, and a reminding signal can be sent to the user by using the APP.

[0137] Further, when the first anode device 4 includes a physical anode, the alarm unit includes: a first alarm unit for alarming the service life of the first anode device 4 and a second alarm unit for alarming the service life of the second anode device 5.

[0138] When the first anode device 4 and the second anode device 5 both include physical anodes, according to the working principle of the physical anode, electrochemical corrosion will occur during use, so the alarm unit needs to be configured. Since the first anode device 4 and the second anode device 5 are located in different positions and have different working conditions, their service lives are generally different. In order to timely and accurately alarm the service life of the first anode device 4 and the second anode device 5 respectively, different alarm units can be correspondingly arranged.

[0139] Of course, the specific forms of the first alarm unit and the second alarm unit are not limited in the present application. For example, the first alarm unit can correspond to a first display module on the panel, and the second alarm unit can correspond to a second display module on the panel. Of course, in some embodiments, the first alarm unit and the second alarm unit can share the same hardware, such as a display screen. The display screen can display the service life of different anode devices respectively.

[0140] In an embodiment, the storage water heater can further include a first temperature detection member for obtaining the water temperature in the first inner tank 11 and a second temperature detection member for obtaining the water temperature in the second inner tank 12, and the first temperature detection member and the second temperature detection member are electrically connected to the controller.

[0141] For a storage water heater, a plurality of temperature detection members are usually arranged in the height direction to detect the water temperature in the inner tank. When the inner tank of the storage water heater includes a first inner tank 11 and a second inner tank 12, at least one first temperature detection member is arranged in the first inner tank 11 to obtain the first water temperature, and at least one second temperature detection member is arranged in the second inner tank 12 to obtain the second water temperature. The first temperature detection member and the second temperature detection member are electrically connected to the controller, and the controller can obtain the first water temperature based on the first temperature detection member and obtain the second water temperature based on the second temperature detection member. The first water temperature can represent the water temperature environment of the first anode device 4, and the second water temperature can represent the water temperature environment of the second anode device 5.

[0142] Based on the storage water heater provided in the above embodiments, the present application further provides a control method of a storage water heater, which can include: obtaining the first electrical parameter of the first anode device 4 by the detection unit 3; and obtaining the second electrical parameter of the second anode device 5 based on the first electrical parameter.

[0143] The first electrical parameter of the first anode device 4 obtained by the detection unit 3 can be the current flowing through the first anode device 4, or the electric quantity flowing through the first anode device 4 within a predetermined time, or other parameters equivalent to the current. The second electrical parameter can be the current generated by the physical anode in the inner tank where it is located, or the electric quantity generated within a predetermined time, or other parameters equivalent to the current.

[0144] The controller can store control logic between the first electrical parameter and the second electrical parameter, and when the control logic is called, the second electrical parameter of the second anode device 5 can be obtained based on the obtained first electrical parameter. The second electrical parameter can at least determine the current physical anode electron consumption condition. Subsequently, the service life of the current physical anode can be determined according to the physical anode electron consumption condition, so as to remind the user to replace the physical anode in time, so that the inner container can be reliably protected at all times.

[0145] Please refer to Figure 9 In an embodiment, the control method of the water storage type water heater can specifically include the following steps:

[0146] Step S10: Obtain the first electrical parameter of the first anode device 4 and the first working condition of the inner container where the first anode device 4 is located, and the second working condition of the inner container where the second anode device 5 is located;

[0147] Step S12: According to the obtained first working condition and first electrical parameter, call the first corresponding relationship between the first electrical parameter and the first working condition and the second corresponding relationship between the second electrical parameter and the second working condition;

[0148] Step S14: According to the obtained first working condition and second working condition and the first corresponding relationship and the second corresponding relationship, determine the proportional coefficient;

[0149] Step S16: According to the proportional coefficient and the obtained first electrical parameter, determine the current second electrical parameter.

[0150] Before obtaining the first electrical parameter, in order to ensure the accuracy of the obtained first electrical parameter, the heating device 2 can be controlled to be powered on for a first time period, and the inner container can be polarized to ensure that the electrons are supplemented. Specifically, the first time period can be 24 hours, and of course the specific value of the first time period is not limited in the present application, as long as the polarization of the inner container is completed.

[0151] In the embodiment, the first working condition can include but is not limited to water temperature, water quality, inner container state and the like. Generally, the first anode device 4 and the second anode device 5 are located in different positions, and at least the water temperature conditions corresponding to the first anode device 4 and the second anode device 5 are different. In addition, for the case that the first anode device 4 and the second anode device 5 are arranged in different inner containers, the inner container state can also be different. In addition, if the water sources connected by the first inner container 11 and the second inner container 12 are different, the water quality of the first anode device 4 and the second anode device 5 can also be different.

[0152] The first electric property parameter can be obtained by the detection unit 3, the first water temperature of the first anode device 4 can be obtained by the first temperature detection unit, and the second water temperature of the second anode device 5 can be obtained by the second temperature detection unit. In the following embodiments, the first working condition is mainly illustrated by taking the first water temperature as the main influencing factor, and the second working condition is mainly illustrated by taking the second water temperature as the main influencing factor.

[0153] Then, according to the obtained first working condition and first electric property parameter, the first corresponding relationship between the first electric property parameter and the first working condition and the second corresponding relationship between the second electric property parameter and the second working condition are retrieved, which specifically includes:

[0154] Firstly, the consumption rate range of the first anode device 4 is determined according to the obtained first working condition and first electric property parameter;

[0155] According to the determined consumption rate range, the first corresponding relationship between the first electric property parameter and the first working condition and the second corresponding relationship between the second electric property parameter and the second working condition are obtained.

[0156] In the embodiment, the first anode device 4 is taken as an example, and the corresponding relationship between the consumption rate range of the anode rod and the working condition (for example, the first water temperature) and the first electric property parameter is stored in the controller in advance, that is, different consumption rate ranges are stored under different first water temperatures and first electric property parameters, and the consumption rate range of the first anode device 4 can be determined according to the obtained first water temperature and first electric property parameter.

[0157] The corresponding relationship corresponding to the consumption rate range is also stored in the controller, and the corresponding relationship includes the corresponding relationship between the first electric property parameter of the first anode device 4 and the first working condition and the corresponding relationship between the second electric property parameter of the second anode device 5 and the second working condition.

[0158] After the consumption rate range of the first anode device 4 is determined, the corresponding first corresponding relationship between the first electric property parameter and the first working condition and the second corresponding relationship between the second electric property parameter and the second working condition can be obtained according to the determined consumption rate range.

[0159] The first electric property parameter can be a first electric current, and the second electric property parameter can be a second electric current. When the first electric property parameter is taken as a first electric current and the second electric property parameter is taken as a second electric current, the first corresponding relationship is I1=f1(T1), and the second corresponding relationship is I2=f2(T2).

[0160] In the above formula, T1 represents a first water temperature, which is detected by a first temperature detection member; T2 represents a second water temperature, which is detected by a second temperature detection member; and the function relationship f1 and the function relationship f2 are one or a combination of multiple of linear relationship, exponential relationship or logarithmic relationship.

[0161] After the first corresponding relationship and the second corresponding relationship are determined, the first working condition is substituted into the first corresponding relationship, and the second working condition is substituted into the second corresponding relationship, and the first current and the second current corresponding to the current are obtained in theory, and the ratio of the second current to the first current is the proportional coefficient. Specifically, the proportional coefficient a = I2 / I1, and the current second current = a x first current. Subsequently, the current second electrical parameter can be determined according to the proportional coefficient and the obtained first electrical parameter. That is, I2 actual = a x I1 actual.

[0162] Further, the control method can further include: determining an accumulated power generated in a predetermined time length based on the current second current; and issuing an alarm signal when the power is greater than a preset power.

[0163] The preset power of the physical anode can be stored in the controller, and when the power released by the physical anode exceeds the preset power, it indicates that the service life of the physical anode has been reached. When the power corresponding to the second current and the cumulative time length is greater than the preset power, an alarm signal can be issued to the user.

[0164] In the embodiment, the first electrical parameter of the first anode device 4 is obtained by the detection device, and the first working condition of the first anode device 4 and the second working condition of the second anode device 5 are obtained by other detection members (such as temperature detection members). The control logic stored in the controller can determine the current second electrical parameter of the second anode device 5. Further, based on the second electrical parameter, the power consumption of the second anode device 5 as the physical anode can be determined, so as to identify the service life of the second anode device 5.

[0165] Please refer to Figure 10 In another embodiment, the control method can specifically include the following steps:

[0166] Step S11: obtaining the first electrical parameter of the first anode device 4 and the first working condition at the inner container where the first anode device 4 is located and the second working condition at the inner container where the second anode device 5 is located;

[0167] Step S13: determining a first corresponding relationship between the first electrical parameter and the first working condition according to the obtained first electrical parameter and the first working condition;

[0168] Step S15: obtaining the current second electrical parameter according to the second working condition and the first corresponding relationship.

[0169] In order to ensure the accuracy of the first electrical property parameter, the heating device 2 can be controlled to be powered for a first time period before the first electrical property parameter is obtained, so as to polarize the inner container and make the electrons in place. Specifically, the first time period can be 24 hours, and the specific value of the first time period is not limited in the present application, as long as the polarization of the inner container is completed.

[0170] In the present embodiment, the first working condition can include but is not limited to water temperature, water quality, inner container state, etc. Generally, the first anode device 4 and the second anode device 5 are located in different positions, and at least the water temperature conditions corresponding to the first anode device 4 and the second anode device 5 are different. In addition, for the case that the first anode device 4 and the second anode device 5 are arranged in different inner containers, the inner container states can also be different. In addition, if the water sources connected by the first inner container 11 and the second inner container 12 are different, the water qualities in which the first anode device 4 and the second anode device 5 are located can also be different.

[0171] In the present embodiment, the first working condition can include but is not limited to water temperature, water quality, inner container state, etc. Generally, the first anode device 4 and the second anode device 5 are located in different positions, and at least the water temperature conditions corresponding to the first anode device 4 and the second anode device 5 are different. In addition, for the case that the first anode device 4 and the second anode device 5 are arranged in different inner containers, the inner container states can also be different. In addition, if the water sources connected by the first inner container 11 and the second inner container 12 are different, the water qualities in which the first anode device 4 and the second anode device 5 are located can also be different.

[0172] Then, the first corresponding relationship between the first electrical property parameter and the first working condition is determined according to the obtained first electrical property parameter and the first working condition. The first electrical property parameter can be taken as an example for illustration, and the first working condition can be taken as an example for illustration.

[0173] In the determination of the first corresponding relationship, the first corresponding relationship can be determined by data fitting based on the obtained first current and first water temperature. Of course, when the first working condition includes more parameters, other parameters can also be used to form multiple groups of data with the first current and the first water temperature, and the first corresponding relationship between the first electrical property parameter and the first working condition can be determined by analyzing and fitting the multiple groups of data.

[0174] After the first corresponding relationship between the first electrical property parameter and the first working condition is determined, the current second electrical property parameter can be obtained according to the second working condition and the first corresponding relationship. Specifically, the second working condition (for example, the second water temperature) can be substituted into the first corresponding relationship to determine the current second electrical property parameter.

[0175] Further, the control method can further include correcting the current second electrical property parameter to obtain an actual value of the current second electrical property parameter.

[0176] When the current second electrical parameter is determined by using the first correspondence relationship and the second working condition, considering that the working conditions of the first anode device 4 and the second anode device 5 may have influencing factors (such as the state of the inner container, etc.) in addition to the difference in water temperature, in order to obtain a more accurate second electrical parameter, the calculated second electrical parameter can be corrected. The correction coefficient can be pre-stored in the controller, or the storage water heater is provided with a self-learning module, and the correction coefficient is obtained by using the self-learning module during use of the storage water heater.

[0177] In a specific embodiment, the first electrical parameter is a first current, and the second electrical parameter is a second current.

[0178] The first correspondence relationship is I1=f(T1).

[0179] In the above formula, I1 represents the first current, and T1 represents the first water temperature in the first working condition.

[0180] The current actual second current I2=a×f(T2).

[0181] T2 represents the second water temperature in the second working condition, a is a pre-set constant or determined by a predetermined manner, I2 represents the current actual second current, and the function relationship f is one or a combination of multiple of linear relationship, exponential relationship or logarithmic relationship.

[0182] The correction coefficient a is a pre-set constant stored in the controller, or the storage water heater is provided with a self-learning module, and the correction coefficient is obtained by using the self-learning module during use of the storage water heater.

[0183] In an embodiment, the first anode device 4 is a physical anode, and the control method can further include:

[0184] Comparing the first current with a pre-set current;

[0185] When the first current is less than the pre-set current, an alarm signal for replacing the first anode device 4 is sent out.

[0186] In the embodiment, when the first anode device 4 is a physical anode, it also has a predetermined service life as a sacrificial anode. In order to monitor the service condition of the first anode device 4 and timely remind the user when the service life of the first anode device 4 reaches a set value, the controller can store a preset current corresponding to the first anode device 4. When the first current flowing through the first anode device 4 is less than the preset current, it indicates that the current first anode device 4 has the ability to provide electrons and cannot meet the needs of reliably protecting the liner. At this time, an alarm signal can be sent to the user to replace the first anode device 4.

[0187] In addition, when the first current is greater than or equal to the preset current, the step of comparing the first current with the preset current is continuously performed until the first current is less than the preset current.

[0188] If the result of comparing the obtained first current with the preset current is that the first current is greater than the preset current, it indicates that the current first anode device 4 still has the ability to provide the required electrons for protecting the liner. At this time, the step of comparing the first current with the preset current can be continuously performed until an alarm signal is sent to replace the first anode device 4 when the first current is less than the preset current.

[0189] The above only describes several embodiments of the present application. Although the embodiments disclosed by the present application are as described above, the content is only used to facilitate understanding of the embodiments of the present application and is not used to limit the present application. Any person skilled in the art of the present application can make any modification and change in the form and details of the embodiments without departing from the spirit and scope of the present application. The patent protection scope of the present application shall be subject to the scope defined by the appended claims.

[0190] A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step can be divided into separate elements, components, parts or steps. The disclosure of "one" or "a" element, component, part or step does not exclude other elements, components, parts or steps.

[0191] It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided would be apparent upon reading the above description. The scope of the teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for all purposes. The omission in the following claims of any aspect of subject matter that is disclosed herein is not a disclaimer of such subject matter, nor should it be regarded that the inventors did not consider such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A storage water heater characterized by, The water storage type water heater comprises: a liner for storing water; a heating device for heating water in the liner; a first anode device, which is mounted in insulation with the liner and is electrically connected with the liner through a first connecting circuit; a detection unit connected to the first connecting circuit, the first anode device or the liner; a second anode device, which is a physical anode and is connected to the liner; the water storage type water heater further comprises a controller electrically connected with the detection unit, the detection unit is used to acquire a first electrical parameter of the first anode device, and the controller can acquire a second electrical parameter of the second anode device based on the acquired first electrical parameter, the first electrical parameter is a first current, and the second electrical parameter is a second current, and a first corresponding relationship between the first current and a first water temperature in a first working condition is I1=f(T1); in the formula, I1 represents the first current, and T1 represents the first water temperature in the first working condition; the first working condition is a working condition at the liner where the first anode device is located; the first water temperature can represent a water temperature at the first anode device; a current actual second current I2=a×f(T2); T2 represents a second water temperature in a second working condition, the second working condition is a working condition at the liner where the second anode device is located, the second water temperature can represent a water temperature at the second anode device, a is a preset constant or is determined in a predetermined manner, I2 represents the current actual second current, and the function relationship f is one or a combination of multiple of linear relationship, exponential relationship or logarithmic relationship.

2. The storage water heater as claimed in claim 1, wherein The liner comprises a first liner and a second liner which are in communication with each other, the first anode device is arranged in the first liner, and the second anode device is arranged in the second liner.

3. The storage water heater according to claim 2, wherein The first anode device comprises any one or a combination of the following: an electronic anode and a physical anode.

4. The water storage type water heater according to claim 1, wherein The first anode device comprises a physical anode, and the detection unit is arranged on the first connecting circuit.

5. The water storage type water heater according to claim 1, wherein The first anode device comprises an electronic anode, and the water storage type water heater further comprises a power supply device, and the power supply device and the detection unit are arranged on the first connecting circuit.

6. The storage water heater as claimed in claim 4 or 5 wherein, The water storage type water heater further comprises a resistance connected in series with the first anode device.

7. The storage water heater as claimed in claim 6 wherein, The first connecting circuit is provided with a first switch, the water storage type water heater is further provided with a second connecting circuit connected in parallel with the first connecting circuit, the second connecting circuit is provided with a second switch, and the resistance is arranged in the first connecting circuit.

8. The storage water heater as claimed in claim 6 wherein, The detection unit is a voltage detection unit, the voltage detection unit is used to acquire a voltage of the resistance, and the controller can determine a current flowing through the first anode device based on the voltage, or The detection unit is a current detection unit, the current detection unit is used to acquire a current flowing through the first anode device, or The detection unit is an electric quantity detection unit, the electric quantity detection unit is used to acquire an electric quantity flowing through the first anode device within a predetermined time length, and the controller can determine a current flowing through the first anode device based on the electric quantity and the predetermined time length.

9. The storage water heater as claimed in claim 2 wherein, The extending direction of the first anode device is consistent with the extending direction of the first inner container, one end of the second anode device extends into the inner container along the height direction, and the other end is fixed on the bottom of the second inner container.

10. The storage water heater as claimed in claim 9 wherein, The first inner container and the second inner container are arranged in an up-down manner along the height direction, and the first inner container is located above the second inner container.

11. The storage water heater as claimed in claim 10 wherein, The second anode device is installed on the second inner container.

12. The storage water heater as claimed in claim 1 wherein, The water storage type water heater further comprises an alarm unit electrically connected with the controller.

13. The storage water heater according to claim 12, wherein When the first anode device comprises a physical anode, the alarm unit comprises a first alarm unit for alarming the service life of the first anode device and a second alarm unit for alarming the service life of the second anode device.

14. The storage water heater as claimed in claim 2 wherein, One end of the first anode device is located outside the first inner container and is detachably connected to the first inner container through a connecting mechanism, and an insulating member is arranged between the connecting mechanism and the first inner container.

15. The storage water heater as claimed in claim 2 wherein, The first inner container is a horizontal inner container extending along a first direction, and has opposite first and second end covers along the first direction, the first end cover being used for installing the first anode device, and the connecting circuit being connected at one end to one end of the first anode device and at the other end to the first end cover.

16. The storage water heater as claimed in claim 2 wherein, The water storage type water heater further comprises a first temperature detection member for obtaining the water temperature in the first inner container and a second temperature detection member for obtaining the water temperature in the second inner container, the first and second temperature detection members being electrically connected with the controller.

17. A control method of the water storage type water heater as claimed in claim 1, wherein The control method comprises: The first electric property parameter of the first anode device is obtained by the detection unit, the first electric property parameter being a first electric current, and the first corresponding relationship between the first electric current and the first water temperature in the first working condition being I1=f(T1); in the formula, I1 represents the first electric current, T1 represents the first water temperature in the first working condition, the first working condition being the working condition at the inner container where the first anode device is located, and the first water temperature being able to represent the water temperature at the first anode device; The second electric property parameter of the second anode device is obtained based on the first electric property parameter, the second electric property parameter being a second electric current, the current actual second electric current I2=a×f(T2); T2 represents the second water temperature in the second working condition, the second working condition being the working condition at the inner container where the second anode device is located, the second water temperature being able to represent the water temperature at the second anode device, a being a preset constant or determined by a predetermined manner, I2 representing the current actual second electric current, and the function relationship f being one or a combination of linear relationship, exponential relationship or logarithmic relationship.

18. The control method according to claim 17, characterized by, The control method further comprises: The consumption rate range of the first anode device is determined according to the obtained first working condition and first electric property parameter; The first corresponding relationship between the first electric property parameter and the first working condition and the second corresponding relationship between the second electric property parameter and the second working condition are obtained according to the determined consumption rate range.

19. The control method according to claim 17, characterized by, The control method further comprises: The electric quantity accumulated in a predetermined time length is determined based on the current second electric current; When the electric quantity is greater than a preset electric quantity, an alarm signal is sent out.

20. The control method of claim 17, wherein The control method further comprises: correcting the current second electrical parameter to obtain an actual value of the current second electrical parameter.

21. The control method of claim 17, wherein The first anode device is a physical anode, and the control method further comprises: comparing the first current with a preset current; when the first current is less than the preset current, issuing an alarm signal for replacing the first anode device.

22. The control method of claim 21, wherein The control method further comprises: when the first current is greater than or equal to the preset current, continuously performing the step of comparing the first current with the preset current until the first current is less than the preset current.

23. The control method of claim 17, wherein The control method further comprises: before the first electrical parameter is acquired, controlling the heating device to be powered for a first time length to polarize the inner container.

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