Water heater

Abstract

The utility model discloses a water heater, and relates to the technical field of electric appliances, the water heater comprises an inner container and a controller, a heater, a water outlet pipe and a water inlet pipe are arranged in the inner container, the water heater further comprises a first water level sensor, and the first water level sensor is arranged in a middle cylinder of the inner container; the first water level sensor is higher than the highest end of the heater and lower than the highest end of the water outlet pipe; wherein the mounting plane where the first water level sensor is located coincides with the axis of the water outlet pipe, and the mounting plane is perpendicular to the axis of the middle cylinder; the controller is electrically connected with the heater and the first water level sensor. According to the technical scheme, the situation of dry burning caused by inclined installation of the inner container can be effectively avoided.

Description

Technical Field

[0001] The present application relates to the field of electrical appliance technology, and in particular to a water heater. Background Art

[0002] Storage-type electric water heaters are household appliances commonly used in people's daily lives. In order to ensure the safety of users during the use of storage-type electric water heaters, storage-type electric water heaters are currently usually equipped with an anti-dry-burning function. Existing storage-type electric water heaters generally include an inner tank and a controller. The inner tank includes a middle cylinder and two end covers arranged at both ends of the middle cylinder. The prior art can achieve the anti-dry-burning function in the following manner: a water level sensor is arranged on one of the end covers, and the water level in the inner tank is determined according to the sensor data detected by the water level sensor. When the determined water level in the inner tank is above the heater of the storage-type electric water heater, the controller starts to control the heater to heat.

[0003] However, during the installation of the water heater, the inner tank may be installed at an angle, which may still easily lead to dry burning. Utility Model Content

[0004] The present application provides a water heater that can effectively avoid dry burning caused by tilted installation of the inner tank.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] The present application provides a water heater, the water heater comprising an inner tank and a controller, the inner tank being provided with a heater, a water outlet pipe and a water inlet pipe, the water heater further comprising a first water level sensor, the first water level sensor being provided in a middle tube of the inner tank, and the first water level sensor being provided at a height higher than the highest end of the heater and lower than the highest end of the water outlet pipe, wherein the installation plane where the first water level sensor is located coincides with the axis of the water outlet pipe, and the installation plane is perpendicular to the axis of the middle tube;

[0007] The controller is electrically connected to the heater and the first water level sensor.

[0008] In the technical solution provided by the present application, on the basis of the existing water heater structure, a first water level sensor is provided on the middle cylinder of the inner tank of the water heater. The present application limits the installation height and installation position of the first water level sensor, and the setting height of the first water level sensor is higher than the highest end of the heater and lower than the highest end of the water outlet pipe. At the same time, the first water level sensor is opposite to the water outlet pipe, that is, by limiting the installation height and installation position of the first water level sensor, no matter whether the inner tank is installed at an angle or not, when the first water level sensor detects the corresponding water level, it can effectively ensure that the water level of the inner tank can submerge the heater, thereby effectively reducing the occurrence of dry burning, and effectively avoiding the situation where the first water level sensor cannot monitor the water level due to the tilt of the inner tank.

[0009] Optionally, the water heater further comprises a second water level sensor and a third water level sensor disposed on both sides of the first water level sensor, and the first water level sensor, the second water level sensor, and the third water level sensor are disposed at equal height intervals along the axial direction of the middle tube;

[0010] The controller is also electrically connected to the second water level sensor and the third water level sensor.

[0011] Optionally, the second water level sensor and the third water level sensor are symmetrically arranged on both sides of the first water level sensor.

[0012] Optionally, the first water level sensor, the second water level sensor, and the third water level sensor are all non-contact liquid level sensors arranged on the outer wall of the inner tank.

[0013] Optionally, the first water level sensor, the second water level sensor, and the third water level sensor are all provided with a support seat, the support seat is provided with a mounting hole, the outer wall of the middle tube is provided with a stud, the stud passes through the mounting hole, a nut is threaded on the stud, and the nut abuts against a side of the support seat away from the middle tube to fix the support seat.

[0014] Optionally, a flow sensor is included, and the flow sensor is electrically connected to the controller.

[0015] Optionally, the flow sensor is arranged on the water inlet pipe, and the flow sensor is used to detect the water inlet flow of the water heater.

[0016] Optionally, the water heater further includes a temperature sensor, and the controller is further electrically connected to the temperature sensor.

[0017] Optionally, the water heater also includes an over-temperature protector; and the controller is also electrically connected to the over-temperature protector.

[0018] In this application, the names of the above-mentioned devices or components are not limited. In actual implementation, these devices or components may appear with other names. As long as the functions of each device or component are similar to those of this application, they are within the scope of this application and its equivalent technologies.

[0019] These and other aspects of the present application will become more apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a water heater provided in an embodiment of the present application;

[0021] Figure 2 A flow chart of a control method for a water heater for preventing dry burning provided in an embodiment of the present application;

[0022] Figure 3 A partial structural schematic diagram of a water heater provided in an embodiment of the present application;

[0023] Figure 4 A partial structural schematic diagram of another water heater provided in an embodiment of the present application;

[0024] Figure 5 A partial structural schematic diagram of another water heater provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of another water heater provided in an embodiment of the present application;

[0026] Figure 7 A flow chart of another method for controlling a water heater for preventing dry burning provided in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the partial structure of a water heater provided in an embodiment of the present application when the installation state is tilted to the right.

[0028] Description of labels:

[0029] 01. Inner tank; 11. Middle tube; 12. End cover; 13. Heater; 14. Water outlet pipe; 15. Water inlet pipe; 02. Controller; 03. First water level sensor; 04. Second water level sensor; 05. Third water level sensor; 06. Flow sensor; 07. Temperature sensor; 08. Over-temperature protector; 09. Hanging bracket. DETAILED DESCRIPTION

[0030] The water heater provided by the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] The terms "first" and "second" and the like in the specification and drawings of this application are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0032] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0033] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0034] Reference Figure 1 , is a schematic diagram of the structure of a water heater provided in an embodiment of the present application. Figure 1 As shown, the water heater includes an inner tank 01 and a controller 02. The inner tank 01 is composed of a middle tube 11 and two end covers 12 respectively located at both ends of the middle tube 11. A heater 13, a water outlet pipe 14 and a water inlet pipe 15 are arranged in the inner tank 01. In addition, the water heater also includes a first water level sensor 03. The first water level sensor 03 is arranged in the middle tube 11 of the inner tank 01, and the setting height of the first water level sensor 03 is higher than the highest end of the heater 13 and lower than the highest end of the water outlet pipe 14; in addition, the first water level sensor 03 is directly opposite to the water outlet pipe 14. Specifically, the installation plane where the first water level sensor 03 is located coincides with the axis of the water outlet pipe 14, and the installation plane is perpendicular to the axis of the middle tube 11. The controller 02 is electrically connected to the heater 13 and the first water level sensor 03.

[0035] Among them, the inner tank 01 is a cylindrical body with one end open and the other end closed; the water inlet pipe 15 is used to introduce external cold water, and the water outlet pipe 14 is used to discharge the hot water in the inner tank 01; the heater 13 is used to heat the water in the inner tank 01. When the water level in the inner tank 01 does not reach the height corresponding to the highest end of the heater 13, if the heater 13 is controlled to heat, dry burning will occur.

[0036] Exemplarily, the controller 02 may control the operating state of the heater 13 according to data detected by the first water level sensor 03 .

[0037] The first water level sensor 03 can be fixed on the middle tube 11 to detect the water level in the inner tank 01. In a possible implementation, when the water level in the inner tank 01 reaches a level consistent with the height set by the first water level sensor 03, the first water level sensor 03 can collect a first target signal, which can be a preset level signal (for example, a high level signal).

[0038] It can be understood that in actual applications, the water heater may further include other components. The embodiments of the present application only introduce the components involved in the present application and do not constitute a limitation on the structure of the water heater.

[0039] Reference Figure 2 , is a flow chart of a control method for preventing dry-burning of a water heater provided in an embodiment of the present application. The method can be applied to Figure 1 In a possible implementation of the water heater shown in FIG. 1 , the method may be executed by the controller 02. In the following description of the embodiment of the present application, the method executed by the controller 02 is taken as an example for explanation. Figure 2 As shown, the method comprises the following steps:

[0040] S210: When a heating instruction is received, determine whether the first water level sensor 03 collects a first target signal.

[0041] Exemplarily, the heating instruction may be an instruction triggered by a user selecting a start button of the water heater.

[0042] Since the first water level sensor 03 can collect the first target signal when the water level in the inner tank 01 reaches a level consistent with the height set by the first water level sensor 03, the controller 02 can judge whether the first water level sensor 03 has collected the first target signal when receiving a heating instruction, and determine whether the water level in the inner tank 01 reaches a level consistent with the height set by the first water level sensor 03 based on the judgment result.

[0043] S220 , when the first water level sensor 03 collects the first target signal, control the heater 13 to heat.

[0044] Since the first water level sensor 03 is set at a height higher than the highest end of the heater 13, and the first water level sensor 03 is directly opposite to the water outlet pipe 14, when the first water level sensor 03 collects the first target signal (that is, when the water level in the inner tank 01 reaches the height set by the first water level sensor 03), regardless of whether the inner tank 01 is installed tilted, at this time, it can effectively ensure that the water level in the inner tank 01 is not higher than the highest end of the heater 13, thereby effectively reducing the occurrence of dry burning. In addition, since the first water level sensor 03 is set at a height lower than the highest end of the water outlet pipe 14, and the first water level sensor 03 is directly opposite to the water outlet pipe 14, it can effectively avoid the situation where the first water level sensor 03 cannot detect the water level when the installation is tilted, resulting in abnormal operation.

[0045] Optionally, after determining whether the first water level sensor 03 collects the first target signal, if it is determined that the first water level sensor 03 has not collected the first target signal, the controller 02 can continuously obtain the collected data of the first water level sensor 03 until it is determined that the first water level sensor 03 has collected the first target signal, and then control the heater 13 to heat.

[0046] In addition, since the water in the inner tank 01 is in a fluctuating state, it may happen that the first water level sensor 03 just collects the first target signal at a certain moment, but the water level in the inner tank 01 does not actually reach the height set by the first water level sensor 03. Based on this, optionally, after determining that the first water level sensor 03 collects the first target signal, the controller 02 can judge multiple times (for example, once every one second) whether the first water level sensor 03 collects the first target signal within a period of time (for example, the duration can be 9 seconds). If the results of multiple consecutive judgments are that the first water level sensor 03 collects the first target signal, it can be determined that the water level in the inner tank 01 has indeed reached the height set by the first water level sensor 03, and the heater 13 can be controlled to heat; otherwise, it can be determined that the water level in the inner tank 01 has not reached the height set by the first water level sensor 03. In this way, the influence of accidental factors on the judgment result of the controller 02 (i.e., determining whether the water level in the inner tank 01 reaches the height set by the first water level sensor 03) can be avoided, thereby improving the accuracy of the determined judgment result, thereby further ensuring that dry burning does not occur.

[0047] The beneficial effects of the technical solutions provided by the above embodiments are described below with specific examples. Figure 3 , Figure 4 ,as well as Figure 5 , which is a partial structural schematic diagram of a water heater in three different installation states provided in an embodiment of the present application. Figure 3 , Figure 4 ,as well as Figure 5 The structure and Figure 1 The structures of the water heaters provided are the same and will not be described in detail here. Figure 3 The installation state of the middle liner 01 is horizontal. Figure 4 The installation state of the middle liner 01 is tilted to the right. Figure 5 The installation state of the middle liner 01 is tilted to the left. Figure 3 , Figure 4 ,as well as Figure 5 It can be seen that, in general, no matter what installation state the inner tank 01 is in, when the water level in the inner tank 01 reaches the height set by the first water level sensor 03 (corresponding to Figure 3 , Figure 4 ,as well as Figure 5 In addition, since the first water level sensor 03 is set at a height higher than the highest end of the heater 13 and lower than the highest end of the water outlet pipe 14, and the first water level sensor 03 is directly opposite to the water outlet pipe 14, h2 is higher than the highest end of the heater 13 (corresponding to Figure 3 , Figure 4 ,as well as Figure 5 h1 in the figure) and is lower than the highest end of the outlet pipe 14 (corresponding to Figure 3 , Figure 4 ,as well as Figure 5 h3) in the figure can effectively ensure that the water level in the inner tank 01 can cover the heater 13.

[0048] Reference Figure 6 , is a schematic diagram of the structure of another water heater provided in an embodiment of the present application. Figure 6 As shown, in Figure 1 On the basis of this, the water heater also includes a second water level sensor 04 and a third water level sensor 05 arranged on both sides of the first water level sensor 03, and the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05 are arranged at equal height intervals along the axial direction of the middle tube 11.

[0049] In one application scenario, the installation status of the water heater can be detected by the second water level sensor 04 and the third water level sensor 05. The second water level sensor 04 and the third water level sensor 05 are both used to detect the water level in the inner tank 01, and the detection principle is the same as that of the first water level sensor 03. Exemplarily, when the water level in the inner tank 01 reaches a level consistent with the height set by the second water level sensor 04, the second water level sensor 04 can collect a second target signal, which can be a preset level signal (for example, a high level signal).

[0050] Reference Figure 7, is a flow chart of another control method for preventing dry-burning water heaters provided in an embodiment of the present application. The method can be applied to Figure 6 In a possible implementation of the water heater shown in FIG. 1 , the method may be executed by the controller 02. In the following description of the embodiment of the present application, the method executed by the controller 02 is taken as an example for explanation. Figure 7 As shown, the method comprises the following steps:

[0051] S710. When a heating instruction is received, determine whether the first water level sensor 03 collects a first target signal, and determine whether the second water level sensor 04 and the third water level sensor 05 collect a second target signal.

[0052] Since the second water level sensor 04 and the third water level sensor 05 are arranged on both sides of the first water level sensor 03, and the detection principles of the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05 are the same (all detect the target signal when the water level in the inner tank 01 reaches a level consistent with the height set by the water level sensor), the order in which the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05 collect the target signal can characterize the installation state of the inner tank 01. For example, if the second water level sensor 04 collects the second target signal first, and then the first water level sensor 03 collects the first target signal, it means that the inner tank 01 is tilted toward the setting direction of the second water level sensor 04. Based on this, in an embodiment of the present application, when receiving a heating instruction, the controller 02 can determine whether the first water level sensor 03 has collected the first target signal, and at the same time determine whether the second water level sensor 04 and the third water level sensor 05 have collected the second target signal, and determine the installation status of the inner tank 01 based on the judgment result, so as to prompt the installer or user to make timely adjustments to the tilted inner tank 01.

[0053] Reference Figure 8 , is a partial structural diagram of a water heater provided in an embodiment of the present application when the installation state is in a rightward tilted state, such as Figure 8 As shown, since the inner tank 01 is tilted to the right, during the process of filling the inner tank 01 with water, the water level of the inner tank 01 first reaches the height set by the second water level sensor 04 (corresponding to Figure 8 h4 in the figure), and then reaches the height set by the first water level sensor 03 (corresponding to Figure 8 h2), the second water level sensor 04 first collects the second target signal, and then the first water level sensor 03 collects the first target signal.

[0054] S720. When the second water level sensor 04 or the third water level sensor 05 collects a second target signal, obtain a second timestamp corresponding to the second target signal.

[0055] S730. When the first water level sensor 03 collects the first target signal, obtain a first timestamp corresponding to the first target signal and control the heater 13 to heat.

[0056] In practical applications of the embodiment of the present application, the step of controlling the heater 13 to heat can also be performed after step S740 or S750, as long as it is performed after determining that the first water level sensor 03 collects the first target signal.

[0057] S740: Determine a collection time difference between the second target signal and the first target signal based on the second timestamp and the first timestamp.

[0058] The acquisition time difference between the second target signal and the first target signal is the difference between the first timestamp and the second timestamp. For example, if the first timestamp is 5 seconds later than the second timestamp, the acquisition time difference is 5 seconds.

[0059] It can be understood that when multiple second target signals and first target signals are received continuously, the time difference between the first second target signal and the first first target signal is used as the acquisition time difference.

[0060] S750: Determine and output prompt information based on the acquisition time difference.

[0061] The prompt information is used to indicate whether the installation status of the inner tank 01 is abnormal.

[0062] In a possible implementation, if the acquisition time difference is greater than the preset time difference, a prompt message may be determined and output. For example, the prompt message may be: the current installation state of the liner 01 is tilted, please reinstall it to adjust the installation state of the liner 01 to a horizontal state.

[0063] Optionally, the prompt information includes tilt degree information and tilt direction information, and the tilt direction information includes right tilt information and left tilt information. Figure 6As shown, the water heater also includes a flow sensor 06, which can be arranged at the water inlet pipe 15 to collect the water inlet flow. The second water level sensor 04 is arranged on the right side of the first water level sensor 03, and the third water level sensor 05 is arranged on the left side of the first water level sensor 03; the embodiment of the present application can determine and output the prompt information in the following manner: determine whether the acquisition time difference is greater than the preset time difference; if the acquisition time difference is greater than the preset time difference, if the second target signal is collected by the second water level sensor 04, determine and output the rightward tilt information; if the second target signal is collected by the third water level sensor 05, determine and output the leftward tilt information; obtain the water inlet flow information collected by the flow sensor 06, and determine the water inlet volume difference according to the water inlet flow information and the acquisition time difference; determine and output the tilt degree information based on the water inlet volume difference.

[0064] When the installation state of the inner liner 01 is tilted to the right, the second water level sensor 04 located on the right side of the first water level sensor 03 first collects the second target signal, and then the first water level sensor 03 collects the first target signal. When the installation state of the inner liner 01 is tilted to the left, the third water level sensor 05 located on the left side of the first water level sensor 03 collects the second target signal first. Based on this, in the embodiment of the present application, when the inner liner 01 is installed tilted, the tilt direction information can be determined and output according to the order in which the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05 collect the target signals, and the relative positions of the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05.

[0065] In addition, during the process from collecting the second target signal to collecting the first target signal, the water inflow rate in the inner tank 01 can characterize the degree of inclination of the inner tank 01. Specifically, the higher the degree of inclination of the inner tank 01, the longer the acquisition time difference between the second target signal and the first target signal, and the more water inflow rate in the inner tank 01 during the process from collecting the second target signal to collecting the first target signal; conversely, the lower the degree of inclination of the inner tank 01, the shorter the acquisition time difference between the second target signal and the first target signal, and the less water inflow rate in the inner tank 01 during the process from collecting the second target signal to collecting the first target signal. Based on this, the embodiment of the present application can set a flow sensor 06 in the water heater to determine the water inflow volume difference during the process from collecting the second target signal to collecting the first target signal based on the water inflow flow information and the acquisition time difference collected by the flow sensor 06, thereby determining and outputting the degree of inclination information based on the water inflow volume difference.

[0066] It can be seen that in the embodiment of the present application, when the inner liner 01 is installed tilted, not only can the tilt direction information used to characterize the tilt direction of the inner liner 01 be determined and output, but also the tilt degree information used to characterize the tilt degree of the inner liner 01 can be determined and output. In this way, more accurate prompt information can be output, so that the installer can quickly adjust the installation state of the inner liner 01 based on the prompt information.

[0067] Optionally, the inclination degree information includes inclination height information, and the inclination degree information is determined and output based on the water inlet volume difference, including: obtaining a preset inner liner width and inner liner length; determining and outputting the inclination height information based on the water inlet volume difference, the inner liner width, and the inner liner length.

[0068] In a possible implementation, the inner liner width may be the radius of the inner liner 01 , and the inner liner length may be the average length of the inner liner 01 .

[0069] For example, Figure 8 As shown, the part corresponding to area A is the water flow rate in the inner tank 01 during the process from collecting the second target signal to collecting the first target signal. The inclined height = water volume difference / (inner tank width*inner tank length), and the inclined height is the distance between h2 and h4.

[0070] Optionally, the second water level sensor 04 and the third water level sensor 05 are symmetrically arranged on both sides of the first water level sensor 03 .

[0071] In practical applications, the corresponding relationship between the water inlet volume difference and the degree of inclination can be determined by mathematical modeling. In order to facilitate numerical calculations in the mathematical modeling process and simplify the modeling process, the second water level sensor 04 and the third water level sensor 05 can be symmetrically arranged on both sides of the first water level sensor 03. In this way, in the modeling process, the leftward inclination and the rightward inclination can share a common mathematical model.

[0072] Optionally, the inclination degree information includes inclination angle information, and determining and outputting the inclination degree information based on the water inlet volume difference includes: determining and outputting the inclination angle information based on the water inlet volume difference and a preset first fitting equation.

[0073] The first fitting equation can characterize the corresponding relationship between the water inlet volume difference and the inclination angle, and the corresponding relationship can be obtained through mathematical modeling.

[0074] Optionally, the inclination degree information includes inclination height information, and determining and outputting the inclination degree information based on the water inlet volume difference includes: determining and outputting the inclination height information based on the water inlet volume difference and a preset second fitting equation.

[0075] The second fitting equation can characterize the corresponding relationship between the water inlet volume difference and the inclined height, and the corresponding relationship can be obtained through mathematical modeling.

[0076] Optionally, the first fitting equation is: Y=AX^2+BX+C, where Y represents the tilt angle, X represents the water inlet volume difference, and A, B, and C are all predetermined coefficients. Similarly, the second fitting equation may also be a quadratic equation.

[0077] Optionally, the coefficients in the first fitting equation and the second fitting equation may be obtained by fitting using a least squares method.

[0078] Optionally, the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05 are all non-contact liquid level sensors arranged on the outer wall of the middle tube 11. In this way, there is no need to open holes in the inner tank 01 to install corresponding sensors, which can reduce the occurrence of water leakage in the inner tank 01.

[0079] Optionally, the first water level sensor 03, the second water level sensor 04, and the third water level sensor 05 are all provided with a support seat, the support seat is provided with a mounting hole, the outer wall of the middle tube 11 is provided with a stud, the stud passes through the mounting hole, a nut is screwed on the stud, and the nut abuts against the side of the support seat away from the middle tube 11 to fix the support seat.

[0080] In the embodiment of the present application, the water level sensor is fixedly installed on the outer wall of the middle tube 11 through a support seat. In this way, there is no need to open a hole on the inner tank 01 to install the water level sensor, and no sealing is required, which can reduce the risk of water leakage and electric leakage.

[0081] Optional, such as Figure 6 As shown, the water heater also includes a temperature sensor 07, and the controller 02 is also electrically connected to the temperature sensor 07, and is used to control the operating state of the heater 13 according to the temperature detected by the temperature sensor 07. Exemplarily, if the temperature detected by the temperature sensor 07 reaches the target temperature set by the user, the controller 02 can control the heater 13 to stop heating.

[0082] Optional, such as Figure 6 As shown, the water heater also includes an over-temperature protector 08, and the controller 02 is also electrically connected to the over-temperature protector 08, and is used to determine whether to cut off the external power supply according to the temperature detected by the over-temperature protector 08. Exemplarily, when the temperature detected by the over-temperature protector 08 exceeds a preset temperature, at this time, the controller 02 can control the external power supply to be disconnected to protect the entire machine.

[0083] Optional, such as Figure 6 As shown, the water heater also includes a bracket 09 for fixing the inner tank 01 on the wall.

[0084] In the embodiment of the present application, on the basis of the above-mentioned embodiment, the second water level sensor 04 and the third water level sensor 05 can be deployed on both sides of the first water level sensor 03, and the prompt information can be determined and output according to the acquisition time difference between the second target signal (collected by the second water level sensor 04 or the third water level sensor 05) and the first target signal (collected by the first water level sensor 03), so that the installer can adjust the installation state of the inner liner 01 according to the prompt information until the inner liner 01 is installed horizontally. In this way, it can be avoided that the inner liner 01 is subjected to excessive force on one side and the outer shell is sunken due to the long-term tilting of the inner liner 01, and the single-side hanger 09 is forced to fall, thereby avoiding the occurrence of safety accidents.

[0085] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A water heater, comprising an inner tank (01) and a controller (02), wherein the inner tank (01) is provided with a heater (13), a water outlet pipe (14) and a water inlet pipe (15), characterized in that: The water heater further comprises a first water level sensor (03), the first water level sensor (03) being arranged in the middle tube (11) of the inner tank (01), and the arrangement height of the first water level sensor (03) being higher than the highest end of the heater (13) and lower than the highest end of the water outlet pipe (14), wherein the installation plane where the first water level sensor (03) is located coincides with the axis of the water outlet pipe (14), and the installation plane is perpendicular to the axis of the middle tube (11); The controller (02) is electrically connected to the heater (13) and the first water level sensor (03).

2. The water heater according to claim 1, characterized in that: The water heater further comprises a second water level sensor (04) and a third water level sensor (05) arranged on both sides of the first water level sensor (03), and the first water level sensor (03), the second water level sensor (04), and the third water level sensor (05) are arranged at equal heights and intervals along the axial direction of the middle cylinder (11); The controller (02) is also electrically connected to the second water level sensor (04) and the third water level sensor (05).

3. The water heater according to claim 2, characterized in that: The second water level sensor (04) and the third water level sensor (05) are symmetrically arranged on both sides of the first water level sensor (03).

4. The water heater according to claim 2, characterized in that: The first water level sensor (03), the second water level sensor (04), and the third water level sensor (05) are all non-contact liquid level sensors arranged on the outer wall of the inner tank (01).

5. The water heater according to claim 4, characterized in that: The first water level sensor (03), the second water level sensor (04), and the third water level sensor (05) are all provided with a support seat, the support seat is provided with a mounting hole, the outer wall of the middle tube (11) is provided with a stud, the stud passes through the mounting hole, a nut is screwed on the stud, and the nut abuts against a side of the support seat away from the middle tube (11) to fix the support seat.

6. The water heater according to claim 2, characterized in that: The water heater further comprises a flow sensor (06), and the flow sensor (06) is electrically connected to the controller (02).

7. The water heater according to claim 6, characterized in that: The flow sensor (06) is arranged on the water inlet pipe (15), and the flow sensor (06) is used to detect the water inlet flow of the water heater.

8. The water heater according to claim 1, characterized in that: The water heater also includes a temperature sensor (07), and the controller (02) is also electrically connected to the temperature sensor (07).

9. The water heater according to claim 1, characterized in that: The water heater also includes an over-temperature protector (08); the controller (02) is also electrically connected to the over-temperature protector (08).

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