Water tank water shortage detection device and domestic electric appliance

Abstract

The utility model relates to the technical field of equipment detection, and provides a water tank water shortage detection device and a domestic electric appliance, the device enables voltage / current signals of an inductor or a circuit in a coil to be different by detecting the relative position of a floater and the coil, the position of the floater is judged according to the difference, and then whether the water tank is in water shortage or not is judged. According to the scheme, the overall appearance of the water tank is not damaged, reliability is high, influences of vibration and falling are avoided, and therefore the accuracy and reliability of water shortage detection results are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of device detection, in particular to a water tank water shortage detection device and a household appliance. BACKGROUND

[0002] In a household appliance, water tank liquid level detection is an important function that can ensure normal operation of the device and prevent dry burning or other faults. Currently, common water tank liquid level detection technologies include magnetic float ball and reed switch scheme, capacitive liquid level detection, and infrared liquid level detection. However, the above detection methods are greatly affected by water quality or environmental factors, resulting in unstable detection results. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a water tank water shortage detection device, which detects the relative position of the float and the coil, so that the inductance in the coil or the voltage / current signal of the circuit is different. The position of the detection float is determined by using the difference, and whether the water tank is short of water is determined. This scheme does not damage the overall appearance of the water tank, has high reliability, is not affected by vibration and falling, and thus improves the accuracy and reliability of the water shortage detection result.

[0004] The present application also provides a household appliance.

[0005] According to the water tank water shortage detection device of the first aspect of the present application, the water tank water shortage detection device comprises:

[0006] A detection main body is arranged in the water outlet channel of the water tank, and the detection main body is provided with a chamber and a waterway flow channel communicating with the chamber, and the water inlet end of the waterway flow channel communicates with the water outlet end of the water tank;

[0007] A detection float is movably arranged in the chamber;

[0008] The detection float is provided with a magnetic core, and the detection main body is provided with a coil matched with the magnetic core.

[0009] According to an embodiment of the present application, the waterway flow channel comprises a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are respectively located at opposite ends of the chamber, and the coil is arranged away from the water inlet channel.

[0010] According to an embodiment of the present application, the detection main body comprises:

[0011] A shell having a hollow channel;

[0012] A first limiting component is arranged at one end of the hollow channel of the shell and connected with the shell;

[0013] A second limiting component is arranged at the other end of the hollow channel of the shell and connected with the shell.

[0014] The shell, the first limiting component and the second limiting component constitute the chamber.

[0015] According to an embodiment of the present application, the first limiting component is a limiting cover detachably connected with the shell, and the second limiting component is a limiting wall integrally formed with the shell.

[0016] According to an embodiment of the present application, a branch flow channel is further included, which is connected with the water tank, and a water inlet end of the branch flow channel is in communication with a water outlet end of the water tank.

[0017] According to an embodiment of the present application, the coil is provided with a terminal at each end, the terminal is connected with a detection circuit, and the detection circuit is used for detecting an electric signal of the coil.

[0018] According to an embodiment of the present application, a protective shell is further included, which is sleeved on an outer wall of the coil.

[0019] According to an embodiment of the present application, the detection float is provided with an avoiding structure for flowing water.

[0020] According to an embodiment of the present application, the avoiding structure is an avoiding notch formed by concave of an outer peripheral wall of the detection float.

[0021] According to an embodiment of the second aspect of the present application, the household appliance comprises:

[0022] A water tank is provided with a water outlet channel.

[0023] A water tank water shortage detection device is arranged in the water outlet channel of the water tank.

[0024] A water pump is arranged in the water outlet channel.

[0025] A heating assembly is arranged for heating at least one of a liquid input to the water pump and a liquid output by the water pump.

[0026] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0027] By detecting the relative position of the detection float and the coil, the inductance or the voltage / current signal of the circuit in the coil is different, and the position of the detection float is determined by using the difference, and then the water shortage of the water tank is determined. The scheme does not damage the overall appearance of the water tank, has high reliability, is not affected by vibration and drop, and thus improves the accuracy and reliability of the water shortage detection result.

[0028] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of 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 as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0030] Figure 1 is a structural schematic diagram of a water tank water shortage detection device provided by the embodiments of the present application.

[0031] Figure 2 is one of installation schematic diagrams of the water tank water shortage detection device provided by the embodiments of the present application.

[0032] Figure 3 is the second installation schematic diagram of the water tank water shortage detection device provided by the embodiments of the present application.

[0033] Reference signs:

[0034] 100: water tank water shortage detection device; 10: detection main body; 11: detection float; 12: magnetic core; 13: coil; 14: shell; 15: limiting cover; 16: limiting wall; 17: wire outlet; 18: wiring terminal; 19: protective shell; 20: branch flow channel; 21: avoiding gap; 22: water pump. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be further described in detail below in combination with the drawings and the embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the terms “first”, “second”, “third” are only used for description purposes, and cannot be understood as indicating or implying relative importance.

[0037] In the embodiments of the present application, unless specifically defined and limited otherwise, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0038] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0039] Figure 1 is a structural schematic diagram of a water tank water shortage detection device provided by the embodiments of the present application; Figure 2 is one of the installation schematic diagrams of the water tank water shortage detection device provided by the embodiments of the present application; Figure 3 is the second installation schematic diagram of the water tank water shortage detection device provided by the embodiments of the present application.

[0040] With reference to Figures 1 to 2 , the embodiments of the present application provide a water tank water shortage detection device 100, comprising: a detection main body 10, used for being installed into a water outlet channel of a water tank, the detection main body 10 is provided with a chamber and a waterway flow channel communicated with the chamber, a water inlet end of the waterway flow channel is communicated with a water outlet end of the water tank; a detection float 11, the detection float 11 is movably arranged in the chamber; wherein the detection float 11 is provided with a magnetic core 12, and the detection main body 10 is provided with a coil 13 matched with the magnetic core 12.

[0041] It can be understood that the waterway flow channel is used for guiding water flow from the water tank into the detection main body 10, and its main function is to ensure that water can flow smoothly into the chamber of the detection main body 10 for water level detection. The water inlet end of the waterway flow channel is communicated with the water outlet end of the water tank, that is, the water of the water tank enters the water inlet end of the waterway flow channel through the water outlet end, so that the waterway flow channel guides the water from the water tank to the chamber of the detection main body 10, ensuring that the water can flow smoothly into the area to be monitored.

[0042] The waterway flow channel guides the water flow into the chamber of the detection main body 10, enabling the detection float 11 to float under the action of the water flow, thereby sensing the change in water level. In actual application, the design and installation of the waterway flow channel need to ensure its close cooperation with the water tank and the detection main body 10 to avoid water leakage or flow channel blockage and other problems.

[0043] Optionally, to avoid the waterway flow channel being blocked by impurities or sediments, the design of the flow channel needs to have a filtering device or regular cleaning measures. At the same time, the material of the waterway flow channel needs to have corrosion resistance, wear resistance and other characteristics to adapt to the long-term water flow environment.

[0044] The detection float 11 can be spherical, cylindrical, etc. The selection of different shapes of the detection float 11 depends on the specific application requirements and water flow characteristics. The detection float 11 contains a magnetic core 12 inside, which helps to affect the coil 13 through the magnetic field, thereby changing the inductance value or current / voltage signal of the coil 13. Optionally, the material and design of the magnetic core 12 can be determined according to its magnetic induction intensity on the coil 13 to achieve accurate water level measurement.

[0045] The design of the detection float 11 needs to match the size and magnetic field distribution of the coil 13 to ensure that the position change of the detection float 11 can effectively affect the inductance value of the coil 13. At the same time, the installation position and limit design of the detection float 11 need to ensure its normal movement range in the water tank and cooperate with the limiting parts of the shell 14 to prevent the detection float 11 from affecting the measurement accuracy due to improper position. The working principle of the detection float 11 is that the up and down movement of the detection float 11 changes its position in the coil 13, affecting the inductance value of the coil 13. When the water level is low, the position of the detection float 11 is low, and the inductance value is large; when the water level is high, the detection float 11 rises, and the inductance value approaches the preset value. At the same time, the position change of the detection float 11 will cause the magnetic field intensity in the coil 13 to change, thereby changing the inductance value or current / voltage signal.

[0046] The coil 13 is wound on the shell 14 of the detection main body 10. The coil 13 is a spiral structure wound by wire. When current flows through the coil 13, a magnetic field is generated around it. The basic functions of the coil 13 include inductance, current transformation, and generation and induction of magnetic field, etc. The magnetic core 12 inside the detection float 11 will affect the magnetic field of the coil 13, and different positions or different magnetic field intensities will cause the inductance value of the coil 13 to change. In the coil 13, the position of the detection float 11 determines the magnetic field distribution, thereby affecting the inductance value or current / voltage signal. The position change of the detection float 11 when the water level changes will cause the inductance value of the coil 13 to change. The change of the inductance value will change the current or voltage flowing through the coil 13, so that the water tank can be determined whether it needs water by measuring these signals.

[0047] Optionally, the winding method of the coil 13 (such as the number of turns, tightness) can affect its inductance value, and the design needs to be optimized according to the requirements of detecting the magnetism of the float 11 and the water level change.

[0048] Optionally, the electrical performance (such as resistance, inductance) of the coil 13 needs to be matched with the overall system design to ensure accurate measurement and stable signal output.

[0049] Based on the above components, the process of water tank water shortage detection is as follows: the water in the water tank flows into the chamber of the detection main body 10 through the water flow channel. The detection float 11 moves up and down in the chamber as the water level changes, wherein the detection float 11 is provided with a magnetic core 12, which changes with the position of the detection float 11. The coil 13 on the detection main body 10 cooperates with the magnetic core 12, and when the detection float 11 moves, the magnetic core 12 changes the inductance value or the magnetic field distribution of the coil 13 in the magnetic field. The inductance change or voltage / current signal change of the coil 13 is detected and processed, wherein the signal change indicates whether the water tank is short of water. When the water tank is short of water, the detection system will issue a water shortage alarm signal to prompt the water tank to be refilled.

[0050] The embodiment of the present application detects the relative position of the float 11 and the coil 13, so that the inductance or voltage / current signal of the coil 13 is different, and this difference is used to determine the position of the detection float 11, and then determine whether the water tank is short of water. This scheme does not damage the overall appearance of the water tank, has high reliability, is not affected by vibration and drop, and thus improves the accuracy and reliability of the water shortage detection result.

[0051] In one embodiment, the water flow channel includes a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are respectively located at opposite ends of the chamber, and the coil 13 is arranged away from the water inlet channel.

[0052] It can be understood that the water inlet channel is the entrance of the water flow into the chamber and is located at one end of the chamber; the water outlet channel is the exit of the water flow from the chamber and is located at the other end of the chamber opposite to the water inlet channel. The water inlet channel and the water outlet channel are located at opposite ends of the chamber, which allows the water flow to enter the chamber from the water inlet channel and flow out from the water outlet channel, forming a continuous flow path, and at the same time allows the water flow to form a relatively uniform flow in the chamber.

[0053] The coil 13 is arranged away from the water inlet channel, for example, the coil 13 is arranged close to the water outlet port, which means that when the detection float 11 approaches or is in the coil 13, it indicates that the water level is already low and approaches or reaches the water outlet. Based on this, an alarm or a control system can be issued in time when the water level is low to prevent problems caused by excessively low water level. This arrangement of the coil 13 helps to optimize the water level control strategy and maintain the safety and stability of the system operation.

[0054] In one embodiment, the detection body 10 comprises: a housing 14, the housing 14 having a hollow channel; a first limiting component provided at one end of the hollow channel of the housing 14 and connected with the housing 14; a second limiting component provided at the other end of the hollow channel of the housing 14 and connected with the housing 14; wherein the housing 14, the first limiting component and the second limiting component constitute a chamber.

[0055] It can be understood that the housing 14 is the main structural part of the entire device, providing protection and support. For example, the housing 14 can be a thin-walled tube, which can effectively reduce the weight and keep the structure simple. The housing 14 contains a hollow channel that can accommodate other components, such as the detection float 11, the first limiting component, etc.

[0056] Optionally, the first limiting component is provided with at least one opening. The purpose of these openings is to allow water flow to pass through, so as to prevent the water tank from being unable to normally detect the water level due to the blocking of water flow by the first limiting component. Through these openings, even when the water level in the water tank is low, water flow can enter the chamber, thereby ensuring that the detection float 11 can accurately float in the water and provide effective detection signals when the water level changes.

[0057] Optionally, the second limiting component is also provided with at least one opening. These openings can allow water flow to pass through, so that the detection float 11 can freely float and will not be mispositioned or cause the system to fail to detect due to the limitation of water flow.

[0058] Optionally, the first limiting component is a limiting cover 15 that is detachably connected with the housing 14. The detachable connection allows the connection between components to be disassembled and reassembled, such as threaded connection, bayonet connection, plug-in connection, clamping connection, etc. The choice of detachable connection depends on the specific application requirements, such as the durability of the components, sealing requirements, and the convenience of disassembly and maintenance. Through detachable connection, components can be removed or replaced, which is conducive to the maintenance and inspection of internal components.

[0059] Optionally, the second limiting component is a limiting wall 16 that is integrally formed with the housing 14. Integrally formed means that the limiting wall 16 and the housing 14 are directly formed as a whole during the manufacturing process, rather than assembled through connecting components later. Integrally formed components are structurally more solid, as they have no joints or connection points, reducing the risk of water leakage or damage. Integrally formed can be achieved through processes such as injection molding, extrusion, casting, etc.

[0060] The chamber is formed by the shell 14, the first limiting component and the second limiting component, and is the main area for detecting the water level. The water flow is measured and controlled in the chamber. Meanwhile, the detection float 11 moves up and down in the chamber with the change of the water level, affecting the inductance value or the current / voltage signal of the coil 13, so as to realize the detection of the water level.

[0061] The water in the water tank enters the hollow passage of the shell 14 through the opening of the limiting cover 15, thereby filling the chamber. The detection float 11 moves in the chamber with the water level, wherein the movement of the detection float 11 affects its position in the hollow passage, and the magnetism of the detection float 11 affects the inductance value of the coil 13 wound on the shell 14. The change of the inductance is detected by the detection circuit, and is used to determine the water level. The water in the chamber flows out through the opening of the limiting wall 16. When the water level decreases, the detection float 11 also decreases, causing the inductance value of the coil 13 to change. After the detection circuit detects the change, it is compared with the preset value, so as to determine whether the water tank is in a water shortage state.

[0062] The design of the shell 14, the water inlet passage and the water outlet passage in the embodiment makes the water flow path clear, which is beneficial to the stable measurement of the water level. Meanwhile, since the water inlet passage and the water outlet passage are clearly set, the water level can be more accurately controlled, and the uneven influence of the water flow can be avoided.

[0063] In one embodiment, referring to Figure 3 The water tank water shortage detection device 100 further comprises a branch flow channel 20, which is connected with the water tank, and the water inlet end of the branch flow channel 20 is in communication with the water outlet end of the water tank.

[0064] It can be understood that the branch flow channel 20 is arranged to connect the water outlet end of the water tank, thereby providing an additional flow path. This design can effectively reduce the influence of the water flow on the float, thereby improving the detection accuracy. The purposes of arranging the branch flow channel 20 include:

[0065] (1) Slow down the water flow speed in the main flow channel: In the case of large water flow, the water flow speed in the main flow channel may cause the detection float 11 to be subjected to excessive impact force, thereby affecting the normal floating of the detection float 11, and even causing misjudgment. The branch flow channel 20 divides a part of the water flow, thereby slowing down the water flow speed in the main flow channel, so that the detection float 11 can work in a relatively stable water flow environment.

[0066] (2) Prevent the detection float 11 from being pushed into the coil 13: When the water flow is too fast, the detection float 11 may be pushed into the coil 13, thereby affecting the inductance or current / voltage detection accuracy. The branch flow channel 20 provides an additional path, reduces the water flow pressure in the main flow channel, and reduces the risk of the detection float 11 being pushed into the coil 13 by the strong flow.

[0067] The water inlet end of the branch flow channel 20 is communicated with the water outlet end of the water tank, so that the water flow is divided into the main flow channel and the branch flow channel 20 when passing through the water tank outlet. When the branch flow channel 20 is arranged, it is necessary to ensure that the flow of the branch flow channel 20 is sufficient to effectively divide the water flow in the main flow channel. Alternatively, the branch flow channel 20 can be arranged side by side beside the main flow channel, or a reasonable flow channel layout is considered to ensure that the water flow can be evenly distributed. At the same time, the arrangement of the flow channel should avoid causing additional resistance and maintain good fluid dynamics.

[0068] For example, the branch flow channel 20 is arranged at the water outlet position of the water tank, the water inlet end of the branch flow channel 20 is communicated with the water outlet end of the water tank, and the water flow channel and the branch flow channel 20 are arranged side by side to enable the water flow to flow through the two paths at the same time. When the water flow is large, the branch flow channel 20 will divide a part of the water flow, reduce the water flow speed of the water flow channel, thereby avoiding that the detection float 11 is pushed into the coil 13 by strong flow, ensuring that the detection float 11 works in the normal floating range, and improving the detection accuracy.

[0069] According to the embodiments of the present application, the branch flow channel 20 is reasonably arranged, so that the detection error caused by the too fast water flow rate can be effectively reduced, thereby improving the reliability and accuracy of the water tank water shortage detection.

[0070] In one embodiment, the coil 13 is provided with a wiring terminal 18 at both ends, and the wiring terminal 18 is connected with a detection circuit. The detection circuit is used for detecting the electrical signal of the coil 13.

[0071] It can be understood that the coil 13 is provided with a wire outlet 17 at both ends, and the wiring terminal 18 is led out from the wire outlet 17. The wiring terminal 18 is a physical connection point between the coil 13 and the detection circuit, so that the electrical signal of the coil 13 can be smoothly transmitted to the detection circuit. The detection circuit can be an inductance detection circuit and a voltage / current detection circuit. The wiring terminal 18 provides a stable connection, ensuring that there is no problem of looseness or poor contact in the signal transmission process, thereby ensuring the reliability of the detection system.

[0072] For the inductance detection scheme, the inductance value of the coil 13 changes with the position change of the detection float 11. When the water tank is short of water, the detection float 11 is in the coil 13, so that the inductance value of the coil 13 becomes large. The wiring terminal 18 transmits the electrical signal at both ends of the coil 13 to the detection circuit. The detection circuit measures the inductance change of the coil 13, and judges whether the water tank is short of water according to the preset inductance value.

[0073] For the current / voltage detection scheme, the terminal 18 is used to transmit the signal generated by the excitation source into the coil 13, and transmit the current or voltage signal across the coil 13 to the detection circuit. The detection circuit analyzes and amplifies these signals to determine the position of the detection float 11, and thus determine whether the water tank is out of water.

[0074] The embodiment of the present application ensures smooth transmission of electrical signals between the coil 13 and the detection circuit through the terminal 18, thereby enabling accurate determination of whether the water tank is out of water.

[0075] In one embodiment, the water tank out-of-water detection device 100 further comprises a protective shell 19, which is sleeved on the outer wall of the coil 13. It can be understood that the main function of the protective shell 19 is to protect the coil 13 from physical damage, corrosion or environmental factors. At the same time, the protective shell 19 can enhance the structural stability of the coil 13, prevent the coil 13 from deforming or being damaged during use.

[0076] Alternatively, the installation method of the protective shell 19 can also include: sliding-in installation: the protective shell 19 can slide into the outer wall of the coil 13 like a sleeve. Threaded fixation: the protective shell 19 can be fixed on the outside of the coil 13 by screwing. Adhesion or welding: the protective shell 19 can be fixed by adhesives or welding.

[0077] Alternatively, the size of the protective shell 19 needs to match the outer diameter of the coil 13 to ensure that it can be firmly wrapped on the outer wall. The protective shell 19 is designed with ventilation holes to dissipate heat or prevent dust accumulation during use. At the same time, the material of the protective shell 19 depends on the specific requirements of the application and the working environment of the coil 13, which can be plastic, metal and rubber or silicone, etc.

[0078] The embodiment of the present application protects the coil 13 by setting the protective shell 19, thereby improving the durability and reliability of the coil 13.

[0079] In one embodiment, the detection float 11 is provided with a water flow avoiding structure, wherein the avoiding structure is an avoiding notch 21 formed in the outer peripheral wall of the detection float 11. It can be understood that the avoiding notch 21 on the detection float 11 is designed to prevent the detection float 11 from sinking into the inside of the coil 13 during water flow. The avoiding notch 21 allows the water flow to pass smoothly, thereby reducing the influence of water flow on the detection float 11 and ensuring the normal floating and position change of the detection float 11 in the water tank. In this way, even if the water flows or fluctuates, the detection float 11 will not be impacted by the water flow and sink, thereby improving the accuracy of the water tank out-of-water detection.

[0080] Alternatively, the number of avoiding notches 21 can be determined based on the following factors:

[0081] Water flow speed: If the water flow speed is large, multiple notches can be set to disperse the water flow impact.

[0082] Detection float 11 size: The size and shape of the detection float 11 affect the number of notches. Larger detection float 11 can be set with multiple notches.

[0083] Detection accuracy requirements: To ensure the accuracy of detection, the number of notches needs to be designed to effectively avoid interference without affecting the floating of the detection float 11.

[0084] The embodiments of the present application set the avoidance notch 21 in the detection float 11, which allows the water flow to pass smoothly, reduces the direct impact of the water flow on the detection float 11, and prevents the detection float 11 from being pushed into the coil 13 by strong water flow. At the same time, by avoiding the direct action of the water flow on the outer wall of the detection float 11, the stability of the float is enhanced, and the position can be accurately reflected when the water level changes.

[0085] The embodiments of the present application also provide a household appliance, which includes: a water tank, the water tank is provided with a water outlet passage; a water tank low water level detection device 100, the detection main body 10 in the water tank low water level detection device 100 is installed in the water outlet passage of the water tank; a water pump 22, the water inlet end of the water pump 22 is in communication with the water outlet passage; a heating assembly, the heating assembly is used for heating at least one of the liquid input to the water pump 22 and the liquid output by the water pump 22.

[0086] Optionally, the household appliance can include a water heater, a water dispenser, a dishwasher, a washing machine, and the like.

[0087] It can be understood that the water tank is a container for storing liquid for the household appliance, and the water tank is provided with a water outlet passage, which functions to allow the liquid in the water tank to flow to the water tank low water level detection device 100 through it. The detection main body 10 in the water tank low water level detection device 100 is installed in the water outlet passage of the water tank, and the water inlet end of the water pump 22 is in communication with the water outlet passage of the water tank, which means that the water pump 22 can extract liquid from the water tank, and then rely on the function of the water pump 22 itself to deliver the liquid to the subsequent required place.

[0088] The heating assembly can be installed between the water outlet passage of the water tank and the water inlet end of the water pump 22 to heat the liquid before it enters the water pump 22; the heating assembly can also be installed at the output end of the water pump 22 to heat the liquid after it is extracted and pressurized by the water pump 22; the heating assembly can also be installed between the water outlet passage of the water tank and the water inlet end of the water pump 22 and at the output end of the water pump 22 to heat the liquid before it enters the water pump 22 and after it is output by the water pump 22.

[0089] Optionally, the installation position of the heating assembly can be determined based on functional requirements (such as instant hot water requirements, preheating function requirements), space layout, and pipeline design, etc.

[0090] Optionally, the heating assembly can include a heating wire, a heating tube, an electromagnetic heating coil, a heating element, etc.

[0091] The working process of the household appliance can be as follows: the water tank starts to fill water, and water enters the water tank from an external water source. The water level in the water tank gradually rises until it reaches a preset water level or maximum capacity. The water shortage detection device starts to work, and the water level in the water tank is monitored in real time. When the water level in the water tank is normal, the water pump 22 starts to work, and the water inlet end of the water pump 22 is connected with the water outlet channel of the water tank. The water pump 22 draws water from the water tank and pushes it to the heating assembly or directly to other purposes. When the water output by the water pump 22 passes through the heating assembly, the heating assembly heats the water. The heating can occur in the liquid before the water pump 22 input or in the liquid after the water pump 22 output.

[0092] The embodiments of the present application optimize the working efficiency, improve the safety and stability of the equipment, and prolong the service life of the equipment by integrating the water shortage detection, the heating assembly and the water pump 22 in the household appliance.

[0093] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place or distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. Those skilled in the art can understand and implement without creative labor.

[0094] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software products, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and include a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0095] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0096] The above embodiments are only used to illustrate the present application, but not to limit the present application. Although the present application is illustrated in detail with reference to the embodiments, those skilled in the art should understand that the technical scheme of the present application can be variously combined, modified or equivalently replaced, without departing from the spirit and scope of the technical scheme of the present application, and all should be covered in the scope of protection of the present application.

Claims

1. A water tank low water detection device, characterised in that, The water tank low water level detection device comprises: a detection main body, which is arranged in a water outlet channel of a water tank, and is provided with a cavity and a water path flow channel in communication with the cavity, wherein a water inlet end of the water path flow channel is in communication with a water outlet end of the water tank; a detection float, which is movably arranged in the cavity; wherein a magnetic core is arranged on the detection float, and a coil is arranged on the detection main body and matched with the magnetic core.

2. The water tank low water detection apparatus of claim 1, wherein The water path flow channel comprises a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are respectively arranged at opposite ends of the cavity, and the coil is arranged away from the water inlet channel.

3. The water tank low water detection apparatus of claim 2, wherein, The detection main body comprises: a shell, which has a hollow channel; a first limiting component, which is arranged at one end of the hollow channel of the shell and connected with the shell; a second limiting component, which is arranged at the other end of the hollow channel of the shell and connected with the shell; wherein the shell, the first limiting component and the second limiting component constitute the cavity.

4. The water tank low water detection apparatus of claim 3, wherein The first limiting component is a limiting cover which is detachably connected with the shell, and the second limiting component is a limiting wall which is integrally formed with the shell.

5. The water tank low water detection apparatus of claim 2, wherein A branch flow channel is further arranged, which is connected with the water tank, and a water inlet end of the branch flow channel is in communication with a water outlet end of the water tank.

6. The water tank low water detection apparatus of claim 1, wherein Two ends of the coil are provided with connection terminals, which are connected with a detection circuit, and the detection circuit is used for detecting an electric signal of the coil.

7. The water tank low water detection apparatus of claim 1, wherein A protective shell is further arranged, which is sleeved on an outer wall of the coil.

8. The water tank low water detection apparatus of claim 1, wherein, The detection float is provided with a water flow avoiding structure.

9. The water tank low water detection apparatus of claim 8, wherein, The avoiding structure is an avoiding notch formed by concave in a peripheral wall of the detection float.

10. A domestic appliance, characterized in that The water tank low water level detection device comprises: a water tank, which is provided with a water outlet channel; the water tank low water level detection device according to any one of claims 1 to 9, wherein the detection main body of the water tank low water level detection device is arranged in the water outlet channel of the water tank; a water pump, a water inlet end of which is in communication with the water outlet channel; a heating assembly, which is used for heating at least one of a liquid input to the water pump and a liquid output by the water pump.

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