Anti-interference washing machine detergent intelligent feeding system and anti-magnetic field crosstalk washing machine detergent box hall detection adding device

Abstract

The application discloses an anti-interference washing machine detergent intelligent feeding system and an anti-magnetic field crosstalk washing machine detergent box Hall detection adding device. The system comprises a main control, a feeding pump and a prompt unit. The main control is internally provided with three modules, namely, a time-sharing sampling lock control module, a double magnetic source mutual checking fault module and a bidirectional interlocking feeding control module. The time-sharing sampling lock control module polles and sleeps three single-pole Hall hardwares in a mutual exclusion mode, avoids sampling during a drum dehydration period, suppresses alternating miscellaneous magnetic fields and reduces standby power consumption. The double magnetic source mutual checking module checks a reference by using a floating ball and a drawer reverse magnet, can distinguish multiple magnetic circuit hardware faults and can dispose the faults in stages. The bidirectional interlocking module forms a closed loop of drawer in-place and liquid storage liquid level double-layer feeding authority, and combines a dosage algorithm to adaptively quantitatively feed. A matching detection device adopts a same-plane two-pole magnetization magnet and a directional induction Hall, so as to prevent magnetic field cross crosstalk. The application solves the defects of the traditional dry reed, parallel Hall sampling false triggering, undistinguishable faults and single feeding control, has strong anti-interference ability, can autonomously diagnose faults, has high feeding precision and low standby power consumption.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of washing device, and particularly relates to an anti-interference washing machine detergent intelligent feeding system and a washing machine detergent box Hall detection adding device capable of resisting magnetic field crosstalk. BACKGROUND

[0002] At present, most of the drum-type full-automatic washing machines adopt a magnetic induction type detection scheme, which realizes automatic quantitative feeding of detergent by cooperating with an electric pump body, relies on a built-in floating magnetic element in the detergent box, a drawer magnetic attraction detection element, and three magnetic induction switches integrated on the side wall of the box body to respectively complete the remaining detergent liquid level detection of the liquid storage cavity and the closed-in position detection of the drawable detergent drawer, and cooperates with a machine control mainboard and an audible and visual prompting device to form a complete automatic feeding system. The magnetic induction feeding scheme is low in cost and simple in assembly, and has become the main feeding scheme in the industry.

[0003] However, due to the restriction of the whole machine operation environment of the drum washing machine, a large amount of alternating stray magnetic field is generated by the motor operation, high-speed rotation of the drum, high-frequency vibration of the whole machine and coupling magnetic field of the metal shell. Combined with the use conditions of the detergent box disassembly, magnetic element assembly and drawer frequent pulling, the existing magnetic induction automatic feeding scheme has four inherent technical defects that cannot be fundamentally solved for a long time, which greatly affects the feeding stability and equipment operation efficiency.

[0004] First, the magnetic signal sampling anti-interference ability is weak, and the standby power consumption is high. The three magnetic induction switches of the existing feeding device are always powered synchronously and collect magnetic field signals in parallel. The sampling time sequence follows the washing program operation and cannot avoid the high-speed dehydration high-vibration and strong stray magnetic working conditions of the drum. The alternating stray magnetic field and transient vibration magnetic interference of the whole machine can easily cause the induction switch to mis-sense and the level signal to jump, thereby misjudging the liquid level height and the drawer closure state, and causing the problems of wrong feeding and missing feeding. At the same time, the three induction switches are always powered synchronously, and there is no time-sharing power-off sleep control. The standby power consumption of the detergent box detection circuit is high, and only the rear-end software filtering and noise reduction can be used to suppress the stray magnetic interference from the signal collection source. The noise reduction correction effect has obvious hysteresis.

[0005] Second, it cannot independently identify the implicit faults of magnetic element assembly, and the fault judgment dimension is single. The existing device only relies on the magnetic induction switch to simply determine whether the two types of use faults of detergent depletion and drawer not closed are caused by the magnetic element assembly. In actual use, the floating magnetic element falls off, the magnetic pole of the magnetic attraction detection element is installed in reverse, and the shell of the detergent box is assembled offset, which will output the same abnormal induction signal as the liquid deficiency condition. The device uniformly determines that the detergent is lacking, and the user cannot distinguish whether the consumables are exhausted or the hardware assembly is damaged. Moreover, the existing device has no fault grading disposal logic. Even if the magnetic element assembly is abnormal, the device still drives the pump body to perform the feeding operation, which is easy to cause the pump body to run empty and burn, the detergent to be invalidally discharged, and the feeding parts to be wasted.

[0006] Third, the liquid level detection and drawer closed detection two sets of control logic are independent of each other, and the permission control of putting has a loophole. The existing equipment drawer magnetic attraction detection and liquid level magnetic attraction detection are two independent control logics which are not linked to each other: only the drawer is not closed to directly stop the pump body, and only the liquid level is extremely low to trigger alarm lock pump, and the two have no hierarchical interlocking relationship. On the one hand, the instantaneous magnetic signal generated by the opening and closing of the drawer is easily triggered by the inductive switch, and the pump body is started to put, which is short-term misleading. On the other hand, when the remaining amount of the detergent in the liquid storage cavity is low, the equipment still puts according to the preset standard dose of the washing program, which may cause insufficient single dose and imbalance of washing ratio, and lacks the dose constraint ability of the remaining amount.

[0007] Fourth, the detection signal, fault signal and putting instruction have no cooperative interlocking logic, and the whole machine washing process has poor adaptability. The signal acquisition, fault judgment and pump body control of the existing putting equipment run independently, and the data is not communicated and the working condition is not linked. After the magnetic component is abnormal and the magnetic field sampling is invalid, the whole machine still completes the water inletting and detergent putting whole process according to the standard process, and cannot adaptively skip the putting process, which causes waste of water resources, electric energy and detergent consumables, and the intelligent working condition adaptability of the whole machine is insufficient. In summary, the existing magnetic induction detergent putting technology cannot adapt to the complex magnetic disturbance working condition of the drum washing machine. SUMMARY

[0008] The purpose of the present application is to provide an anti-magnetic interference washing machine detergent intelligent putting control system, which specifically comprises: a main control unit, a putting pump unit and a prompt unit.

[0009] The main control unit is internally provided with a time-sharing sampling lock control module, a double magnetic source mutual verification fault module and a bidirectional interlocking putting control module.

[0010] The time-sharing sampling lock control module is electrically connected with three single-pole Hall switches on the inductive PCB board, adopts a hardware mutual exclusion polling mechanism, only allows a single-pole Hall switch to collect magnetic field signals at the same time, and the remaining two single-pole Hall switches are synchronously in a dormant low-power consumption state, and the sampling collection period is staggered with the high-speed dehydration vibration period of the washing machine drum, so as to avoid the alternating magnetic interference of the whole machine running.

[0011] The double magnetic source mutual verification fault module relies on the hardware characteristics that the polarity of the floating ball first magnet and the drawer detection magnet is opposite to establish a verification reference: when the drawer single-pole Hall switch and any one of the liquid level single-pole Hall switches synchronously output effective induction signals, it is judged that the floating ball first magnet is abnormally assembled, the floating ball first magnet is detached or the detergent box shell is offset, and the corresponding fault signal is output according to the fault level.

[0012] The bidirectional interlocking dispensing control module receives detection signals of three single-pole Hall switches to form a double dispensing authority locking logic: the drawer single-pole Hall switch is permanently cut off when there is no continuous in-place signal, and the output of the dispensing pump unit is cut off; when the liquid level single-pole Hall switch detects a low liquid level state of the liquid storage cavity, the total amount of single washing agent dispensing is limited, and the dispensing pump unit is directly locked when the liquid level is below the limit threshold.

[0013] The main control unit drives the dispensing pump unit to execute quantitative dispensing and drives the prompt unit to output a low-liquid or fault prompt according to the stable magnetic field signal collected by the time-sharing sampling lock control module, the fault signal output by the double magnetic source mutual verification fault module and the dispensing locking instruction generated by the bidirectional interlocking dispensing control module.

[0014] In the present application, a further embodiment is that the time-sharing sampling lock control module specifically comprises three independent controllable switches, a time sequence distribution subunit and a vibration synchronous acquisition subunit.

[0015] The three independent controllable switches are one-to-one corresponding to the three single-pole Hall switches, and the three single-pole Hall switches share the same signal acquisition channel.

[0016] The time sequence distribution subunit turns on the single switch in turn to complete magnetic field sampling at a fixed period, and turns off the remaining two switches to make the corresponding single-pole Hall switch dormant, and the static current of a single single-pole Hall switch does not exceed 2 mu A.

[0017] The vibration synchronous acquisition subunit synchronously acquires the washing machine drum rotation speed signal, and pauses all single-pole Hall switch sampling operations when the drum rotation speed is higher than a preset vibration threshold, and resumes the single-pole Hall switch polling acquisition after the drum speed is reduced to a low vibration interval, and filters the instantaneous miscellaneous magnetic pulses brought by high-speed operation.

[0018] In the present application, a further embodiment is that the double magnetic source mutual verification fault module specifically comprises a signal synchronous judgment subunit, a fault type differentiation subunit and a fault grading output subunit.

[0019] The signal synchronous judgment subunit compares the output levels of the drawer single-pole Hall switch and the two liquid level single-pole Hall switches in real time, and if the drawer single-pole Hall switch and any one of the liquid level single-pole Hall switches output valid high levels at the same time, a fault determination process is triggered.

[0020] The fault type differentiation subunit differentiates fault types according to the amplitude difference of the output signals of the three single-pole Hall switches: the two liquid level single-pole Hall switches are synchronously triggered to determine that the first magnet of the floating ball is detached.

[0021] The drawer single-pole Hall switch and the liquid level single-pole Hall switch are synchronously triggered to determine that the drawer detection magnet polarity is reversed.

[0022] Three single-pole Hall switch signal amplitude overall attenuation determines the offset of the detergent box shell assembly;

[0023] The fault grading output subunit divides two-level fault determination logic: a slight offset fault, which only outputs a clean detergent box reminder through the prompt unit and does not limit the operation of the dispensing pump unit;

[0024] The second level of severe magnetic circuit fault directly locks the dispensing pump unit and continuously outputs the fault sound and light prompt.

[0025] In the present application, a further embodiment is that the drawer in the bidirectional interlocking dispensing control module has in-position determination logic, which specifically includes a signal delay filtering subunit and an in-position lock release subunit;

[0026] The signal delay filtering subunit sets a fixed delay threshold, and only when the stable in-position signal output by the drawer single-pole Hall switch reaches the preset time length, an unlock signal is sent to the in-position lock release subunit;

[0027] The in-position lock release subunit releases the initial power supply lock of the dispensing pump unit only after receiving the unlock signal, thereby filtering the single-pole Hall switch false trigger signal caused by transient miscellaneous magnetism during drawer pulling.

[0028] In the present application, a further embodiment is that the liquid level layered control logic in the bidirectional interlocking dispensing control module specifically includes a liquid level gear recognition subunit and a dose calculation subunit.

[0029] Two liquid level single-pole Hall switches are arranged above and below along the floating ball lifting direction, and the upper liquid level single-pole Hall switch corresponds to the low liquid level gear, and the lower liquid level single-pole Hall switch corresponds to the normal liquid level gear.

[0030] The liquid level gear recognition subunit distinguishes the current liquid level gear of the liquid storage cavity according to the trigger state of the two liquid level single-pole Hall switches.

[0031] The dose calculation subunit calculates the actual dispensing dose of a single time according to the recognized liquid level gear and the in-position state of the drawer.

[0032] In the present application, a further embodiment is that the dose calculation subunit is configured with a magnetic sensing coupled dispensing dose algorithm, and the algorithm formula is as follows: , wherein:

[0033] Q——actual dispensing dose of a single time;

[0034] Q0——preset reference dispensing amount of the current washing program;

[0035] H——real-time liquid level height of the liquid storage cavity converted by Hall sampling;

[0036] H maxThe upper limit of the normal liquid level of the liquid storage cavity;

[0037] H min The critical liquid level of the liquid deficiency;

[0038] K lock The drawer in place locking coefficient, when the drawer is completely returned to the stable position, K lock =1, when the drawer is pulled out / half open / in place signal is unstable, K lock =0;

[0039] When the calculated Q is less than the preset minimum safe dispensing amount, the main control unit directly locks the dispensing pump unit and pushes the liquid deficiency reminder through the prompt unit.

[0040] In the present application, a further embodiment is that the prompt unit specifically comprises a light prompt subunit, a voice prompt subunit;

[0041] The light prompt subunit outputs constant light reminder under the liquid deficiency working condition;

[0042] The light prompt subunit outputs intermittent flashing light under the slight magnetic offset fault;

[0043] When the heavy magnetic circuit fault occurs, the light prompt subunit and the voice prompt subunit are started synchronously, and flashing light and fault voice broadcast are outputted.

[0044] In the present application, a further embodiment is that the main control unit is further configured with a washing program linkage subunit, and the washing program linkage subunit specifically comprises a water inlet synchronous sampling subunit and a fault shunt control subunit;

[0045] The water inlet synchronous sampling subunit preferentially drives the time-sharing sampling lock control module to complete a round of three single-pole Hall switch full-channel sampling verification in the water inlet stage of the washing machine;

[0046] The fault shunt control subunit receives the fault signal of the double magnetic source mutual verification fault module, and if there is a secondary heavy magnetic circuit fault in the verification, the washing agent dispensing step is directly skipped, and the program is jumped to the rinsing program.

[0047] In the present application, a further embodiment is that the main control unit is further configured with an entire machine sleep coordination subunit, and the entire machine sleep coordination subunit specifically comprises a standby power-off control subunit and a wake-up trigger subunit;

[0048] When the washing machine is in standby, the standby power-off control subunit cuts off the power supply of the three single-pole Hall switches, and only the low-power running of the time sequence distribution subunit is reserved;

[0049] After receiving the door opening and washing program starting signal, the wake-up trigger subunit restarts the time-sharing sampling lock control module and the three single-pole Hall switches to resume sampling work.

[0050] The laundry detergent box Hall detection adding device of anti-magnetic field crosstalk comprises a detergent box shell, a drawable detergent drawer, a floating ball assembly, and an induction PCB board.

[0051] The floating ball assembly is installed inside a liquid storage cavity of the detergent box shell, and a floating ball first magnet is arranged in the floating ball assembly.

[0052] A drawer detection magnet is embedded and injection molded at the bottom of the detergent drawer.

[0053] The induction PCB board is fixedly assembled to the side wall of the detergent box shell.

[0054] The two liquid level single-pole Hall switches only generate an induction trigger signal for the first reference magnet.

[0055] The floating ball assembly drives the floating ball first magnet to displace with the liquid level in the liquid storage cavity to trigger the corresponding liquid level single-pole Hall switch.

[0056] The drawer detection magnet is displaced by the drawer pulling action to only trigger the drawer single-pole Hall switch.

[0057] The magnetic fields generated by the floating ball first magnet and the drawer detection magnet cannot cross trigger the non-corresponding single-pole Hall switch, and the drawer position detection signal and the liquid level detection signal are not interfered with each other.

[0058] The drawer detection magnet with the same-plane two-pole magnetization structure can narrow the effective induction range of the single-pole Hall switch.

[0059] The beneficial effects of the present application are as follows:

[0060] 1. Source suppression of the whole machine alternating magnetic interference, synchronous reduction of detection loop standby power consumption, and improvement of magnetic field detection precision; compared with the existing switch synchronous power-on, post software filtering noise reduction mode, this scheme adopts switch time-sharing mutual exclusion power-on, high and low vibration period peak shifting sampling mode, avoids vibration magnetic interference of the drum dehydration period, and magnetic field detection signal stability is greatly improved; the rest of the induction switch time-sharing sleep power-off effectively reduces the static power consumption of the detection loop, and avoids the false trigger problem caused by long-term electrification.

[0061] 2. Realize automatic discrimination and grading of magnetic attraction hardware failure, distinguish consumable liquid shortage and hardware damage, and reduce equipment maintenance difficulty; rely on the opposite magnetic poles of the two groups of magnetic attraction components in the box to establish a verification reference, rely on the combination form of multi-channel induction signal, accurately distinguish four types of working conditions of real liquid shortage of detergent, falling of floating magnetic parts, reverse installation of magnetic attraction parts, and box body assembly offset; execute control strategy in stages, only prompt cleaning and maintenance for slight box body offset, and do not affect normal dispensing, directly lock the dispensing pump for severe magnetic attraction hardware failure, avoid pump body idling damage, and facilitate users and after-sales to quickly locate the failure cause.

[0062] 3. Build double-layer linkage dispensing locking authority, fill in dispensing control loopholes, and ensure accurate and compliant detergent dispensing; break the existing independent detection and control mode of two sets of drawer and liquid level, and establish a hierarchical interlocking mechanism: take the continuous and stable closure of the drawer as the pre-dispensing threshold, filter the instantaneous magnetic and vibration magnetic miscommunication signals, and prevent false dispensing due to the drawer not being closed tightly; the remaining amount of the liquid level restricts the dispensing amount, and when the remaining amount is insufficient, the dispensing amount is reduced, and the critical liquid shortage directly locks the pump, avoiding the problem of substandard dispensing ratio caused by insufficient remaining amount, and adapting to adaptive dispensing of different liquid remaining amounts.

[0063] 4. Realize full-working-condition signal linkage control, optimize washing process, and save water, electricity and consumable resources; integrate magnetic field sampling, fault verification and full-dimension signal linkage scheduling of dispensing lock, adjust the washing machine washing process according to the fault level of magnetic attraction hardware, directly skip the dispensing process and jump to rinsing for severe fault, without executing invalid water filling and dispensing steps; at the same time, the light and fault reminder are output in stages, the man-machine interaction is intuitive, and the running stability, use safety and energy saving of the detergent dispensing system are improved as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 is a structure diagram of a washing machine detergent box Hall detection adding device resistant to magnetic field crosstalk Figure One ;

[0065] Figure 2 is a structure diagram of a washing machine detergent box Hall detection adding device resistant to magnetic field crosstalk Figure Two ;

[0066] Figure 3Figure 2 is a schematic diagram of a position structure of a floating ball assembly and an induction PCB board Figure One ;

[0067] Figure 4 Figure 2 is a schematic diagram of a position structure of a floating ball assembly and an induction Figure Two . DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present application will be clearly described below with reference to 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0069] In the description of the present application, it should be noted that the terms used herein are only intended to describe the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technology, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so further discussion is not needed in the subsequent drawings once an item is defined in one drawing.

[0070] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not intended to describe a specific order or chronological sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally a class, and do not limit the number of objects, for example, the first object can be one or more. In addition, the specification and claims "and / or" indicate at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are "or" relationship.

[0071] It should be noted that, in the description of the present application, the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0072] It should be noted that in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0073] The embodiment provides an anti-magnetic interference washing machine detergent intelligent dispensing control system, which is suitable for a household drum full-automatic washing machine detergent box quantitative dispensing scene, solves the industry pain points of magnetic interference, such as magnetic interference false triggering, fault mixed judgment, single dispensing control, and magnetic source crosstalk of the existing dry reed detection and Hall parallel sampling dispensing system, wherein the existing industry conventional technology has the following problems: first, in the field of washing machine detergent magnetic detection, conventional schemes all use drawer magnets and floating ball magnets to independently detect logic, two magnets only determine the opening and closing of the drawer and the height of the liquid level, and the two magnets are never used to build mutual verification reference with opposite polarity, the industry fixed determination logic is that no inductive signal of Hall / dry reed = lack of liquid or drawer pulled open, and it is unable to distinguish four types of working conditions, such as normal consumable liquid shortage, floating ball magnet falling off, magnet polarity reverse installation, and washing machine box shell deviation, and all hardware magnetic circuit faults are uniformly judged as liquid shortage faults; second, the existing Hall dispensing system all uses three inductive components for all-weather parallel synchronous power sampling, has no hardware electrical exclusion polling circuit, and the sampling timing is not controlled by the drum dehydration speed, and the sampling is performed as usual during the strong alternating magnetic interference period of dehydration, and only relies on the rear-end software average filtering noise reduction, which has a poor effect and high standby power consumption of Hall; third, the existing dispensing lock is a simple superposition of two independent functions of drawer lock pump and limit liquid level lock pump, and the two functions have no hierarchical permission binding and only have two logic levels of dispensing permission and global lock pump, and have no low liquid level flow limiting intermediate control level, and instantaneous magnetic interference easily causes false unlocking and false dispensing of the dispensing pump; fourth, the conventional drawer magnet is single-sided and single-pole magnetized, the magnetic field is divergent and can cross trigger the liquid level inductive element, the inductive element is easily false triggered under the conditions of half-opened drawer and machine body vibration, and the magnetic circuit crosstalk problem cannot be fundamentally solved.

[0074] The embodiment provides an anti-magnetic interference washing machine detergent intelligent dispensing control system, which is specifically composed of a main control unit, a dispensing pump unit, and a prompt unit; the main control unit selects a washing machine special industrial-grade MCU main control chip, which is internally provided with an AD sampling port, a relay driving port, a speed communication port, and a level comparison port, is suitable for washing machine whole machine 485 communication and CAN double communication protocol, the dispensing pump unit selects a direct current miniature quantitative peristaltic dispensing pump, the pump body is provided with a start-stop power-off self-locking structure, the minimum single pump dosage can reach 2 mL, and the prompt unit integrates a board-mounted IO port controlled sound and light peripheral device, and the three are electrically linked through a shielded wire harness, and the shielded wire harness reduces the magnetic coupling interference between boards.

[0075] The main control unit is internally provided with a time-sharing sampling lock control module, a double magnetic source mutual verification fault module, and a bidirectional interlocking dispensing control module; the three modules are a linked closed loop control architecture, rather than independent running subprograms, and the modules millisecond-level interact with each other in real time in terms of level data, whole machine working condition data, and dispensing lock instructions, so as to form an integrated closed loop control of magnetic field sampling-magnetic source verification-dispensing lock.

[0076] The time-sharing sampling lock control module is electrically connected with three single-pole Hall switches on the sensing PCB board, three single-pole Hall switches are uniformly selected as N-pole sensing single-pole Hall devices, and the general all-pole Hall on the market is abandoned, so as to eliminate the non-differential magnetic trigger from the hardware level, and the hardware mutual exclusion polling mechanism is adopted. In the embodiment, the Hall hardware electrical components are applied to the washing machine, which belongs to the pre-active anti-magnetic design, and is different from the conventional software filtering and noise reduction. The hardware mutual exclusion polling relies on the interlocking MOS relay circuit on the PCB to realize the electrical hardware interlocking. The circuit physical layer eliminates the simultaneous power-on conduction of any two Hall switches, and only allows a single-pole Hall switch to collect the magnetic field signal at the same time. The remaining two single-pole Hall switches are synchronized to enter the hardware power-off sleep low-power-consumption state. The sleep is a complete power-off sleep, which is different from the software standby sleep, and completely eliminates the sleep leakage current. Moreover, the sampling collection period is staggered with the high-speed dehydration vibration period of the washing machine drum, the preset dehydration speed of the drum is greater than or equal to 900 r / min, the whole high-magnetic field interval is suspended, and the sampling operation of the Hall is suspended. Only in the water stable pressure, normal washing, 600 r / min or less low-speed uniform distribution low-magnetic vibration working condition, the sampling is started. The magnetic interference signal is avoided from the source, and the magnetic interference signal is reduced from the source.

[0077] Preferably, the double magnetic source mutual verification fault module relies on the hardware characteristics of the opposite polarities of the floating ball first magnet and the drawer detection magnet to establish a verification reference: in the embodiment, the floating ball first magnet is uniformly charged with S-pole exposed magnetism, and the effective sensing surface of the drawer detection is uniformly charged with N-pole exposed magnetism. The two are paired with opposite fixed polarities when leaving the factory. Through the double magnetic polarity mutual verification fault discrimination mechanism of the embodiment, the existing market two-magnet independent detection inherent logic is broken, and the reverse magnet cannot be synchronously triggered under the compliance working condition. Only the magnetic circuit assembly failure can be synchronously triggered, which directly distinguishes between hardware magnetic circuit failure and normal liquid shortage failure.

[0078] Under the normal compliance assembly working condition, the magnetic fields of the two groups of magnets with opposite polarities repel each other, and the drawer Hall and the liquid level Hall cannot synchronously output effective sensing signals. When the drawer single-pole Hall switch and any one liquid level single-pole Hall switch synchronously output effective sensing high-level signals, it directly violates the preset reverse magnetic circuit reference logic, and immediately determines that the floating ball first magnet is abnormally assembled, the floating ball first magnet is detached, or the detergent box shell is offset. Combined with the Hall level amplitude and the number of trigger channels, the fault level is distinguished, and a graded fault signal is output, so as to realize the accurate discrimination of hardware magnetic circuit failure and normal liquid shortage failure of consumables from the physical level, and to eliminate the fault mixed judgment.

[0079] Compared with the existing Hall detection scheme, the double magnetic source mutual checking fault module of the embodiment has the following advantages: first, the system pre-embeds a polarity mutual exclusion checking reference at the hardware level, sets a first reference magnetic pole for the first magnet of the floating ball, and adopts a same-plane two-pole magnetizing structure for the drawer detection magnet. The liquid level single-pole Hall switch only responds to the first reference magnetic pole, and the drawer single-pole Hall switch only responds to the reverse magnetic pole. A physical checking scale is built by relying on the inherent magnetizing properties of the magnet. Under normal assembly conditions, the drawer Hall and the liquid level Hall do not output valid sensing signals at the same time. Once they are triggered at the same time, it can be directly determined that the magnetic circuit hardware assembly is failed. This is different from the traditional scheme which only relies on software level filtering and does not have physical determination basis. Second, the module combines the synchronous triggering state and the output amplitude of the Hall signal to make a multi-dimensional joint determination, which can accurately distinguish three types of hardware defects. The synchronous full-amplitude triggering of the two liquid level Halls determines that the floating ball magnet is detached, the synchronous triggering of the drawer Hall and any liquid level Hall determines that the drawer magnet polarity is reversed, and the overall amplitude attenuation of the three Hall signals determines that the detergent box shell is assembled offset. This solves the defect of the traditional scheme that can only simply identify whether there is a signal and cannot accurately trace the hardware fault type. Third, the module divides two levels of differentiated disposal logic according to the fault type and links the control and the whole machine washing program. Only the first level of slight shell offset fault with uniform signal attenuation only prompts cleaning reset by light, without limiting the work of the dispensing pump. The second level of severe magnetic circuit fault such as magnet detachment and magnet pole reversal directly locks the dispensing pump and starts the audible and visual alarm, and at the same time drives the washing program to control the subunit to jump to the rinsing process directly, forming a complete closed-loop control of magnetic circuit fault identification-classified disposal-sequential operation of the whole machine, breaking through the control limitation of the conventional product that only simply lights the fault light and cannot adaptively intervene in the washing process.

[0080] The bidirectional interlocking dispensing control module receives the detection signals of the three single-pole Hall switches to form a double dispensing permission locking logic. In the embodiment, the two levels of Hall signals are bound and constrained to each other to build an access+dose closed-loop dispensing permission. When the drawer single-pole Hall switch has no continuous and stable in-place signal, the main control directly outputs a relay hard-off level to permanently cut off the output of the dispensing pump unit, which belongs to the pre-dispensing permission lock that cannot be temporarily released by default after power-on. When the liquid level single-pole Hall switch detects a low liquid level state of the liquid storage cavity, it executes an intermediate flow limiting control logic, compresses the total amount of single detergent dispensing according to the liquid level, and retains a small dose to adapt to the washing program. When the liquid level is lower than the preset limit, the pump is locked, and a three-level liquid level control logic is formed, which fills the gap of the existing technology that only has two control levels of dispensing and locking.

[0081] Preferably, the main control unit collects the stable magnetic field signal after filtering the miscellaneous magnetic field according to the time-sharing sampling lock control module, the classified and graded fault signal output by the double magnetic source mutual checking fault module, and the hierarchical release locking instruction generated by the bidirectional interlocking release control module. After linkage and coupling research and judgment, it respectively drives the release pump unit to perform adaptive quantitative release of the adaptive liquid level margin and the drawer closed state, and simultaneously drives the prompt unit to accurately output the consumable liquid shortage prompt or the magnetic circuit hardware fault prompt. The two types of prompt logic are completely distinguished, and there is no error confusion problem.

[0082] Preferably, the time-sharing sampling lock control module specifically includes three independent controllable switches, a time sequence distribution subunit, and a vibration synchronous acquisition subunit. The three independent controllable switches are PCB board-mounted low-conduction-resistance MOS tube electronic switches, each MOS tube is matched with a reverse anti-conduction diode, and is provided with an electrical interlocking anti-misconducting circuit. The three independent controllable switches are respectively one-to-one corresponding to three single-pole Hall switches, the three single-pole Hall switches share the same AD signal acquisition channel and the main control single A / D conversion port, thereby greatly reducing the main control IO port occupation and reducing the line coupling miscellaneous magnetic field caused by PCB multi-path wiring.

[0083] The time sequence distribution subunit is internally provided with a timing crystal circuit, which sequentially turns on the single MOS switch to complete magnetic field sampling at a fixed period of 200 ms. The single Hall single effective sampling time is fixed at 30 ms, and the corresponding MOS tube is disconnected as soon as the sampling is completed. The other two switches are synchronously disconnected to make the corresponding single-pole Hall switch power off and sleep. The working condition parameters are factory-fixed and cannot be tampered with. The single-pole Hall switch sleep static current is strictly controlled to be not more than 2 μA, which is much lower than the industry conventional Hall 15 μA-30 μA standby sleep current. The whole machine detection loop standby power consumption is reduced by more than 85%, which meets the washing machine national standard low power consumption standby requirement.

[0084] The vibration synchronous acquisition subunit synchronously acquires the washing machine drum running speed signal in real time through the washing machine whole machine CAN bus. The preset vibration miscellaneous magnetic judgment speed threshold is 900 r / min. When the real-time speed of the drum is higher than the preset threshold of 900 r / min, the three MOS switches are synchronously cut off, all single-pole Hall switches are suspended from sampling operation, and the high-intensity transient miscellaneous magnetic pulse during dehydration period is shielded. After the drum speed is reduced to the low vibration interval of 600 r / min, the inertia residual vibration of the drum and the cavity residual magnetism are eliminated after a delay of 100 ms, and the polling sampling operation of the three single-pole Hall switches is automatically restored. From the hardware timing level, the high-speed running transient miscellaneous magnetic pulse is accurately filtered, and the anti-interference stability is much better than the existing software mean filter and differential filter remedial type noise reduction means.

[0085] Preferably, the double magnetic source mutual checking fault module specifically comprises a signal synchronization judgment subunit, a fault type distinguishing subunit and a fault grading output subunit. The signal synchronization judgment subunit is internally provided with a high-speed differential level comparison circuit, which compares the output levels of the drawer single-pole Hall switch and the two liquid level single-pole Hall switches in real time at the millisecond level, and is specially provided with a 50 ms synchronization judgment delay window, which effectively avoids the short-time synchronization false triggering caused by body vibration and transient miscellaneous magnetism, and the judgment rule is that when only the drawer single-pole Hall switch and any one of the liquid level single-pole Hall switches maintain an effective 3.3 V high level for more than 50 ms, it is determined that the synchronization triggering is effective, and the fault judgment process is started immediately; relying on the polarity opposite reference of the two groups of magnets, the synchronization triggering condition cannot occur in the normal assembly condition, and once triggered, it is 100% magnetic circuit assembly failure, which is the unique bottom verification logic of the application.

[0086] The fault type distinguishing subunit is internally provided with a preset Hall level amplitude database, the compliance effective induction standard high level is 3.3 V, the magnetic field attenuation interval level is 1.0 V-1.8 V, and three types of hardware faults are accurately distinguished according to the output signal amplitude difference of the three single-pole Hall switches: the two liquid level single-pole Hall switches synchronously output 3.3 V full-amplitude high level, and the drawer Hall has no induction signal, which is determined that the floating ball first magnet is off, the floating ball loses the polarity limit, and the global magnetic field triggers the liquid level Hall without difference; the drawer single-pole Hall switch and any liquid level single-pole Hall switch synchronously output full-amplitude 3.3 V high level, which is determined that the drawer detection magnet polarity is reversely assembled, and the factory pairing magnetic pole relationship is invalid; the signal amplitudes of the three single-pole Hall switches are uniformly attenuated to the interval of 1.0 V-1.8 V, the magnetic field transmission distance is offset, and it is determined that the detergent box shell buckle is misaligned and assembled offset.

[0087] The fault grading output subunit relies on the double magnetic source mutual checking result to divide two-level fault judgment logic, and the grading logic completely relies on the magnetic circuit mutual checking judgment, rather than the single Hall signal judgment: the first level of slight offset fault, that is, the amplitudes of the three Halls are uniformly attenuated, there is no Hall synchronous high level signal, only the cleaning detergent box is output through the prompt unit, the drawer buckle is reset, and the work of the dispensing pump unit is not limited, and the current washing program is not interrupted; the second level of severe magnetic circuit fault, that is, the magnet off and the magnetic pole reverse assembly type Hall synchronous triggering fault, directly hardware locks the dispensing pump unit and continuously outputs the fault sound and light prompt, prevents the dispensing pump from being dry and burned under no load, and prevents the pump body from being worn, and realizes the differential management of faults.

[0088] Preferably, the drawer in-place judgment logic in the bidirectional interlocking dispensing control module specifically comprises a signal delay filtering subunit and an in-place lock release subunit, the signal delay filtering subunit is internally provided with an RC hardware delay filtering circuit, a fixed effective in-place delay threshold is set to 300 ms, and the judgment rule is that only when the stable in-place high level output of the drawer single-pole Hall switch lasts for 300 ms, the 10 ms-200 ms transient magnetic pulse false signals caused by the opening and closing of the drawer and the shaking of the machine body are eliminated, and then a compliant unlocking signal is sent to the in-place lock release subunit.

[0089] Only when the compliant unlocking signal is received by the in-place lock release subunit, the initial power supply lock of the dispensing pump unit can be released, the washing machine is powered on by default, the dispensing pump is locked, the stable in-place signal of the drawer must be obtained to unlock the dispensing permission, the transient magnetic signals caused by the drawer pulling and the resonance magnetic signals of the whole machine are completely filtered to prevent the single-pole Hall switch from being short-circuited, and the permission threshold for the dispensing is built to prevent the drawer from being unlocked and the device from being shaken.

[0090] Preferably, the liquid level layering control logic in the bidirectional interlocking dispensing control module specifically comprises a liquid level gear recognition subunit and a dose calculation subunit. Two liquid level single-pole Hall switches are vertically arranged along the vertical lifting direction of the floating ball, the installation center distance is fixed to 12 mm, and the installation angle is zero deviation. The upper liquid level single-pole Hall switch corresponds to the 20% volume low liquid level gear of the liquid storage cavity, and the lower liquid level single-pole Hall switch corresponds to the 65% volume normal liquid level gear of the liquid storage cavity. The two-point layering collects the liquid level, which is different from the existing single-point limit liquid level detection mode.

[0091] The liquid level gear recognition subunit accurately distinguishes three liquid level gears according to the combined triggering state of the two liquid level single-pole Hall switches: no triggering of both Hall switches = extreme liquid shortage gear, triggering of only the upper Hall switch = low liquid level flow limiting gear, and triggering of both Hall switches = normal full dispensing liquid level gear.

[0092] The dose calculation subunit is coupled with the recognized three liquid level gears and the stable in-place state of the drawer to link and calculate the single dispensing dose, so as to realize the adaptive reduction of the dispensing dose with the lower liquid level, directly limit the dispensing with the unstable drawer signal, and realize the mutual constraint and closed-loop control of the two types of permissions.

[0093] Preferably, the dose calculation subunit is configured with a magnetic sensing coupled dispensing dose algorithm, the algorithm is coupled with the Hall sampling magnetic flux, the real-time liquid level, and the drawer locking coefficient for linkage and coupling calculation, and the algorithm formula is as follows: , in which: Q is the single actual dispensing dose.

[0094] Q0 is the preset reference dispensing amount of the current washing program gear, and the reference values of the fast washing, standard washing, large item washing, and drum cleaning gears of the washing machine are matched respectively.

[0095] H - Hall sampling magnetic flux linear conversion of the real-time liquid level height of the liquid storage cavity, which is converted from the Hall-induced magnetic field intensity modulus;

[0096] H max - The upper limit of the normal liquid level of the liquid storage cavity, which is the rated full liquid level of the detergent box;

[0097] H min - The critical liquid level height, reaching this height directly locks the dispensing pump;

[0098] K lock - The drawer in place locking coefficient, when the drawer is fully returned and buckled, and the single-pole Hall switch outputs valid stable signals for more than 300 ms, K lock = 1, when the drawer is pulled out, half open, and the in-place signal fluctuates, K lock = 0, the coefficient is zeroed to directly prohibit dispensing operation;

[0099] When the calculated Q is less than the preset minimum safe dispensing amount of 5mL, it is determined that the remaining amount of detergent in the cavity is insufficient to complete the washing ratio, the main control unit directly locks the dispensing pump unit, and after excluding the magnetic circuit fault through double magnetic source mutual verification, the real liquid shortage prompt is pushed through the prompt unit, ensuring that the liquid shortage error is 100% accurate.

[0100] Preferably, the prompt unit specifically includes a light prompt sub-unit and a voice prompt sub-unit; the prompt grading is completely linked to the double magnetic source mutual verification fault determination result, which corresponds to the working condition grading prompt one by one without confusion error; under the compliant real liquid shortage condition, the light prompt sub-unit outputs a constant white light to remind the user to add detergent consumables;

[0101] Under the condition of first-level slight magnetic offset fault, the light prompt sub-unit outputs intermittent flashing yellow light for 1s interval, prompting the user to clean the detergent box cavity and reset the drawer buckle;

[0102] When the second-level severe magnetic circuit fault occurs, the light prompt sub-unit and the voice prompt sub-unit are started synchronously, outputting 0.5s high-frequency flashing red light and fixed standardized fault voice broadcast, which distinguishes the fault level and facilitates the user and after-sales to quickly identify the fault type.

[0103] Preferably, the main control unit is further configured with a washing program linkage subunit, which specifically includes a water inlet synchronous sampling subunit and a fault shunt control subunit; the washing program linkage subunit is adapted to washing machine full washing procedure linkage, reduces water and electricity energy consumption in fault working condition; the water inlet synchronous sampling subunit is driven to complete a round of three single-pole Hall switch full-channel sampling verification in the water inlet steady pressure stage of 0-30s of the washing machine water inlet, when the water flow is stable, the machine body vibration amplitude is minimum, and the magnetic interference is weakest, to realize the pre-washing self-checking, to check the magnetic circuit assembly fault in advance, and to avoid the invalidity during the washing and the program interruption.

[0104] The fault shunt control subunit receives the fault signal of the double magnetic source mutual verification fault module in real time, if the verification determines that there is a secondary severe magnetic circuit fault, the detergent dispensing process does not need to be performed, and the washing machine directly jumps to the rinsing program, to save water, electricity and detergent consumables, which is different from the existing control logic that still goes through the full process of water inlet, dispensing and rinsing after the fault.

[0105] Preferably, the main control unit is further configured with a whole machine sleep coordination subunit, which specifically includes a standby power-off control subunit and a wake-up trigger subunit; the whole machine sleep coordination subunit is adapted to the national standard ultra-low power sleep requirement of the whole machine, and matches the Hall time-sharing sleep architecture; when the washing machine is in standby power-off sleep, the standby power-off control subunit directly cuts off the power supply of the three single-pole Hall switches by MOS, completely eliminates the Hall static leakage current, and only keeps the time sequence distribution subunit in low-power sleep operation, so that the standby power consumption of the whole machine magnetic detection loop is lower than 10μA.

[0106] After the wake-up trigger subunit receives the two types of effective wake-up signals of the door lock opening and the touch panel washing program starting, it delays for 200ms to complete the PCB board magnetic circuit voltage stabilization and vibration elimination, restarts the time-sharing sampling lock control module and the three single-pole Hall switches to restore the polling sampling work, and takes into account the standby energy saving and the starting magnetic field sampling stability of the whole machine.

[0107] Another embodiment provides a washing machine detergent box Hall detection adding device resistant to magnetic field crosstalk, which includes a detergent box shell 1, a drawable detergent drawer 2, a floating ball assembly 4 and an induction PCB board 3; the detergent box shell 1 is made of glass fiber modified ABS non-magnetic material, which eliminates the shell metal filler magnetic coupling magnetic interference.

[0108] The floating ball assembly 4 is installed inside the liquid storage cavity of the detergent box shell 1, and the floating ball assembly 4 can only displace vertically up and down along the cavity, without horizontal radial deviation and shaking; the floating ball assembly 4 is internally provided with a floating ball first magnet 5, which is packaged by epoxy full encapsulation process, is resistant to washing liquid corrosion and hydrolytic aging, and the exposed end face of the floating ball first magnet 5 is uniformly axially magnetized to form a first reference magnetic pole, and the full-exposed magnetic pole is uniformly free of mixed poles and magnetic interference.

[0109] The bottom of the detergent drawer is embedded with a drawer detection magnet 6 by insert injection molding, which is integrally injection molded without later glue sticking assembly error, and the assembly precision is controllable. The drawer detection magnet 6 adopts a mold integrated same-plane two-pole magnetization structure, and the same exposed plane insulation partition is formed into a first reference magnetic pole and a second reverse magnetic pole. A 3mm insulation isolation partition belt is arranged between the two poles, which completely eliminates the same-plane magnetic pole magnetic field interference.

[0110] The induction PCB board 3 is clamped and assembled on the side wall of the detergent box shell 1, the magnetic field induction transmission distance is constant, and the magnetic field attenuation error caused by assembly gap deviation is eliminated. Three single-pole Hall switches 7 are integrally arranged on the induction PCB board 3. The hardware models of the three single-pole Hall switches 7 are completely consistent, only the main control bottom layer writes different induction magnetic pole parameters, and the three single-pole Hall switches 7 include two liquid level single-pole Hall switches 7 and one drawer single-pole Hall switch 7.

[0111] The program bottom layer of the two liquid level single-pole Hall switches 7 is solidified, only the first reference magnetic pole generates an induction trigger signal, and the second reverse magnetic pole is naturally shielded by hardware; the program bottom layer of the drawer single-pole Hall switch 7 is solidified, only the second reverse magnetic pole with a polarity opposite to that of the first reference magnetic pole generates an induction trigger signal, and the first reference magnetic pole is naturally shielded by hardware, realizing magnetic pole directional isolation from the component induction bottom layer.

[0112] The floating ball assembly 4 rises and falls with the liquid level in the liquid storage cavity, driving the floating ball first magnet 5 to vertically displace, only being able to trigger the corresponding height liquid level single-pole Hall switch 7 in the same direction; the detergent drawer is horizontally pulled to linearly displace, driving the drawer detection magnet 6 to synchronously horizontally displace, only being able to directionally trigger the drawer single-pole Hall switch 7, and the magnetic field trigger path is completely isolated.

[0113] The magnetic field polarities of the floating ball first magnet 5 and the drawer detection magnet 6 are repulsive and inductive, and the magnetic field cannot cross trigger the non-corresponding single-pole Hall switch 7, realizing that the drawer position detection signal and the liquid level detection signal do not interfere with each other at the physical level, and completely solving the industry common problem of double magnetic source cross interference.

[0114] The drawer detection magnet 6 adopting the same-plane two-pole magnetization structure can accurately narrow the effective induction interval of the single-pole Hall switch 7, and the effective induction distance is limited to within 2mm, and the excess distance has no inductive level output; only when the detergent drawer is completely returned and buckled and locked, the drawer single-pole Hall switch 7 can stably output a stable in-place signal. In the drawer half-open state and the equipment running high-frequency vibration working condition, the magnet is out of the effective induction interval of the Hall, and the drawer single-pole Hall switch 7 will not produce a false trigger signal. From the hardware source, the control system delay filtering and bidirectional interlocking logic are cooperated, and the false trigger and false pouring problems of miscellaneous magnetic field are completely eliminated.

[0115] The embodiments of the present application are described above with reference to the drawings, and the embodiments and features in the embodiments of the present application can be combined with each other without conflict, and the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection of the present application.

Claims

1. A magnetic disturbance resistant laundry machine detergent intelligent dosing control system, characterized in that, Specifically comprising: The main control unit, the delivery pump unit, the prompt unit; The main control unit is built-in time sampling lock control module, double magnetic source mutual check fault module, bidirectional interlocking delivery control module; The time sampling lock control module is electrically connected with three single-pole Hall switches on the induction PCB board, adopts a hardware mutual exclusion polling mechanism, only allows a single-pole Hall switch to be powered on to collect a magnetic field signal at the same time, and the remaining two single-pole Hall switches are synchronously put into a dormant low-power consumption state, and the sampling collection period is staggered with the high-speed dehydration vibration period of the washing machine drum, so that alternating stray magnetic interference of the whole machine is avoided; The double magnetic source mutual check fault module establishes a check reference based on the hardware characteristics that the polarity of the floating ball first magnet and the drawer detection magnet is opposite: when the drawer single-pole Hall switch and any one of the liquid level single-pole Hall switches synchronously output effective induction signals, it is determined that the floating ball first magnet is abnormally assembled, the floating ball first magnet is detached or the washing agent box shell is offset, and the corresponding fault signal is output according to the fault level; The bidirectional interlocking delivery control module receives the detection signals of the three single-pole Hall switches to form a double delivery permission locking logic: when the drawer single-pole Hall switch does not have a continuous in-place signal, the delivery pump unit output is permanently cut off; when the liquid level single-pole Hall switch detects a low liquid level state of the storage cavity, the total amount of single washing agent delivery is limited, and the liquid level is directly locked to the delivery pump unit when it is below the limit threshold. The main control unit drives the delivery pump unit to perform quantitative delivery and drives the prompt unit to output a low-liquid or fault reminder according to the stable magnetic field signal collected by the time sampling lock control module, the fault signal output by the double magnetic source mutual check fault module and the delivery locking instruction generated by the bidirectional interlocking delivery control module.

2. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 1, wherein, The time sampling lock control module specifically comprises three independent controllable switches, a time sequence distribution subunit and a vibration synchronous collection subunit. The three independent controllable switches are one-to-one corresponding to the three single-pole Hall switches, and the three single-pole Hall switches share the same signal collection channel. The time sequence distribution subunit turns on the single switch in turn to complete magnetic field sampling at a fixed period, and the remaining two switches are turned off to make the corresponding single-pole Hall switch dormant, and the static current of a single single-pole Hall switch does not exceed 2 mu A. The vibration synchronous collection subunit synchronously acquires the washing machine drum rotation speed signal, and pauses all single-pole Hall switch sampling operations when the drum rotation speed is higher than the preset vibration threshold, and restores the single-pole Hall switch polling collection after the drum speed is reduced to a low vibration interval, and filters the instantaneous stray magnetic pulse brought by high-speed operation.

3. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 1, wherein, The double magnetic source mutual check fault module specifically comprises a signal synchronous judgment subunit, a fault type distinguishing subunit and a fault grading output subunit. The signal synchronous judgment subunit compares the output levels of the drawer single-pole Hall switch and the two liquid level single-pole Hall switches in real time, and if the drawer single-pole Hall switch and any one of the liquid level single-pole Hall switches simultaneously output effective high levels, the fault determination process is triggered; The fault type distinguishing subunit distinguishes the fault type according to the amplitude difference of the output signals of the three single-pole Hall switches: the two liquid level single-pole Hall switches synchronously trigger the determination of the floating ball first magnet detachment; The drawer single-pole Hall switch and the liquid level single-pole Hall switch synchronously trigger the determination of the polarity of the drawer detection magnet. Three single-pole Hall switch signal amplitude overall attenuation determines the offset of the detergent box shell assembly; The fault grading output subunit divides two-level fault determination logic: a first slight offset fault, only through the prompt unit output clean detergent box reminder, without limiting the work of the delivery pump unit; The second level of severe magnetic circuit fault, directly lock the delivery pump unit and continue to output fault sound and light prompt.

4. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 1, wherein, The drawer in the bidirectional interlocking delivery control module is determined by the in-place determination logic, which specifically includes a signal delay filtering subunit and an in-place locking release subunit; The signal delay filtering subunit sets a fixed delay threshold, and only when the drawer single-pole Hall switch continuously outputs a stable in-place signal for a preset length of time, does it send an unlock signal to the in-place locking release subunit; After receiving the unlock signal, the in-place locking release subunit releases the initial power supply lock of the delivery pump unit, filtering the single-pole Hall switch false trigger signal caused by the instantaneous miscellaneous magnetic of the drawer pulling.

5. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 4, wherein, The liquid level layering control logic in the bidirectional interlocking delivery control module specifically includes a liquid level gear recognition subunit and a dose calculation subunit. Two liquid level single-pole Hall switches are arranged above and below along the floating ball lifting direction, with the upper liquid level single-pole Hall switch corresponding to the low liquid level gear and the lower liquid level single-pole Hall switch corresponding to the normal liquid level gear. The liquid level gear recognition subunit distinguishes the current liquid level gear of the liquid storage cavity according to the trigger state of the two liquid level single-pole Hall switches. The dose calculation subunit calculates the actual single delivery dose according to the recognized liquid level gear and the drawer in-place state.

6. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 5, wherein, The dose operator unit is configured with a magnetic sensing coupling dose delivery algorithm, and the algorithm formula is as follows: , wherein: Q——single actual delivery dose; Q0——current washing program preset reference delivery amount; H——real-time liquid level height of the liquid storage cavity converted by Hall sampling; H max - upper normal liquid level height of the liquid reservoir H min — critical liquid level height in case of liquid deficiency; K lock - drawer in position lock coefficient, K = 1 when the drawer is fully home and stable in position lock K = 0 when the drawer is out / half open / unstable in position signal lock ​ When the calculated Q is less than the preset minimum safe delivery amount, the main control unit directly locks the delivery pump unit and pushes the low-liquid reminder through the prompt unit.

7. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 1, wherein, The prompt unit specifically includes a light prompt subunit and a voice prompt subunit. Under the condition of low liquid, the light prompt subunit outputs constant light reminder. Under the condition of slight magnetic offset fault, the light prompt subunit outputs intermittent flashing light. When the severe magnetic circuit fault occurs, the light prompt subunit and the voice prompt subunit are started synchronously, outputting flashing light and fault voice broadcast.

8. The magnetic disturbance resistant laundry machine detergent smart dosing control system of claim 1, wherein, The main control unit is also configured with a washing program linkage subunit, which specifically includes a water inlet synchronous sampling subunit and a fault shunt control subunit. The water inlet synchronous sampling subunit drives the time-sharing sampling lock control module to complete a round of three single-pole Hall switch full-channel sampling verification during the washing machine water inlet stage. The fault shunt control subunit receives the fault signal of the double magnetic source mutual verification fault module, and if there is a second level of severe magnetic circuit fault, it directly skips the detergent delivery step and jumps to the rinsing program.

9. The magnetic disturbance resistant washing machine detergent smart dosing control system of claim 2, wherein, The main control unit is also configured with a whole machine sleep coordination subunit, which specifically includes a standby power-off control subunit and a wake-up trigger subunit. When the washing machine is in standby, the standby power-off control subunit cuts off the power supply of the three single-pole Hall switches, leaving only the low-power operation of the timing distribution subunit. After receiving the door opening and washing program start signals, the wake-up trigger subunit restarts the time-sharing sampling lock control module and the three single-pole Hall switches resume sampling work.

10. A laundry detergent pod Hall effect detection addition device that is immune to magnetic field cross-talk, characterized by, The detergent box shell, the pullable detergent drawer, the floating ball assembly, and the induction PCB board are included. The floating ball assembly is installed inside the liquid storage cavity of the detergent box shell, and a floating ball first magnet is arranged in the floating ball assembly. The drawer detection magnet is embedded in the bottom of the detergent drawer and is formed by injection molding. The induction PCB board is fixedly assembled on the side wall of the detergent box shell, and three single-pole Hall switches are arranged on the induction PCB board. The two liquid level single-pole Hall switches only generate an induction trigger signal for the first reference magnetic pole, and the drawer single-pole Hall switch only generates an induction trigger signal for the second reverse magnetic pole opposite to the first reference magnetic pole. The floating ball assembly drives the floating ball first magnet to move with the liquid level in the liquid storage cavity, so as to trigger the corresponding liquid level single-pole Hall switch. The drawer detection magnet is displaced by the pulling action of the detergent drawer, so as to trigger only the drawer single-pole Hall switch. The magnetic fields generated by the floating ball first magnet and the drawer detection magnet cannot cross trigger the non-corresponding single-pole Hall switch, so that the drawer position detection signal and the liquid level detection signal are not interfered with each other. The drawer detection magnet with the same surface two-pole magnetization structure can narrow the effective induction range of the single-pole Hall switch. Only when the detergent drawer is completely returned, the drawer single-pole Hall switch stably outputs the in-place signal. In the half-open state of the drawer and the device running vibration working condition, the drawer single-pole Hall switch will not generate a false trigger signal.

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