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CN115418830B - Water discharge control circuit applied to washing machine and washing machine - Google Patents

Water discharge control circuit applied to washing machine and washing machine Download PDF

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Publication number
CN115418830B
CN115418830B CN202211230942.XA CN202211230942A CN115418830B CN 115418830 B CN115418830 B CN 115418830B CN 202211230942 A CN202211230942 A CN 202211230942A CN 115418830 B CN115418830 B CN 115418830B
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CN
China
Prior art keywords
water level
washing machine
controller
switch
control circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202211230942.XA
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Chinese (zh)
Other versions
CN115418830A (en
Inventor
葛金榜
崔增良
周胜梅
王增强
丁兆波
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Hisense Refrigerator Co Ltd
Original Assignee
Hisense Refrigerator Co Ltd
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Publication date
Application filed by Hisense Refrigerator Co Ltd filed Critical Hisense Refrigerator Co Ltd
Priority to CN202211230942.XA priority Critical patent/CN115418830B/en
Publication of CN115418830A publication Critical patent/CN115418830A/en
Application granted granted Critical
Publication of CN115418830B publication Critical patent/CN115418830B/en
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/08—Draining of washing liquids
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/10—Temperature of washing liquids; Heating means therefor

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

An embodiment of the present application provides a drain control circuit applied to a washing machine and a washing machine, the drain control circuit including: a water level sensor; the water level switch comprises a public end and a first connecting end, wherein the public end is connected with a power supply, and when the water level height in the washing machine meets a first preset height, the public end is communicated with the first connecting end; the drainage pump comprises a first power end and a second power end, the first power end is connected with a power supply, and the drainage pump starts drainage when the first power end and the second power end are electrified at the same time; and the controller is connected with the water level sensor and the first connecting end of the water level switch, and when the controller determines that the water level height in the washing machine detected by the water level sensor meets the drainage condition or determines that the public end of the water level switch is communicated with the first connecting end, the controller controls the second power end of the drainage pump to be electrified. The technical scheme of the embodiment of the application can avoid the situation that the water in the washing machine overflows because the drainage pump cannot be started when the water level sensor detects faults.

Description

Water discharge control circuit applied to washing machine and washing machine
Technical Field
The application relates to the technical field of electromechanical control, in particular to a drainage control circuit applied to a washing machine and the washing machine.
Background
With the improvement of living standard of people, the washing of clothes by adopting washing machine equipment is a washing mode which is frequently used by people. In the related art, in a process of cleaning laundry, a washing machine apparatus generally supplies water for washing the laundry into the washing machine through controlling a water inlet valve, and controls a drain pump to drain contaminated water in the washing machine. Meanwhile, in order to avoid water overflow in the washing machine, a water level sensor is generally arranged to acquire the water level in the washing machine, so that when the acquired water level in the washing machine is determined to meet a certain condition, a drainage pump is started to drain water. However, if the water level sensor fails to detect abnormality, it may be determined that the water level in the washing machine does not meet the water level corresponding to a certain condition in case that the water level in the washing machine is too high, and the heater cannot be started to drain water, so that water in the washing machine overflows, resulting in household property loss of users and even safety accidents.
Disclosure of Invention
In order to solve the technical problems, embodiments of the present application provide a drainage control circuit applied to a washing machine and a washing machine.
According to an aspect of an embodiment of the present application, there is provided a drain control circuit applied to a washing machine, including: a water level sensor; the water level switch comprises a public end and a first connecting end, wherein the public end is connected with a power supply, and when the water level height in the washing machine meets a first preset height, the public end is communicated with the first connecting end; the drainage pump comprises a first power end and a second power end, the first power end is connected with the power supply, and the drainage pump starts drainage when the first power end and the second power end are electrified at the same time; and the controller is connected with the water level sensor and the first connecting end of the water level switch, and when the controller determines that the water level height in the washing machine detected by the water level sensor meets a drainage condition or determines that the public end of the water level switch is communicated with the first connecting end, the controller controls the second power end of the drainage pump to be electrified.
Optionally, the first connection end of the water level switch is further connected with the second power end of the drainage pump.
Optionally, the first strong current switch comprises a first control end and a first contact switch, the first control end is connected with the controller, one end of the first contact switch is connected with the power supply, and the other end of the first contact switch is connected with a second power end of the drainage pump; when the controller determines that the water level sensor detects that the water level in the washing machine meets the drainage condition or determines that the common end of the water level switch is conducted with the first connecting end, the controller controls the conduction of the two ends of the first contact switch through the first control end of the first strong current switch so as to electrify the second power end.
Optionally, the input end of the first detection module is connected with the water level sensor, and the output end of the first detection module is connected with the controller; the input end of the second detection module is connected with the first connecting end of the water level switch, and the output end of the second detection module is connected with the controller.
Optionally, the water level switch further includes a second connection end, the second connection end is connected with the controller, and when the water level in the washing machine meets a second preset height, the public end is connected with the second connection end; wherein the second preset height is smaller than the first preset height; and when the controller detects that the public end is conducted with the second connecting end, the controller controls the second power end of the drainage pump to be powered off.
Alternatively, the power source comprises a three-phase power source or a single-phase power source
Optionally, the water level switch further includes a third connection end, and when the water level height in the washing machine meets a third preset height, the common end is connected with the third connection end; the drainage control circuit further comprises a contactor and a heater, wherein the contactor comprises a first end point and a second end point, the first end point is connected with a third connecting end of the water level switch, the second end point is connected with the controller, and the contactor is conducted when the first end point and the second end point are simultaneously electrified; the heater is connected with the contactor, and heating is started when the contactor is conducted; and when the controller determines that the water level height detected by the water level sensor meets the heating condition, the controller controls the second endpoint of the contactor to be electrified.
Optionally, the second strong current switch comprises a second control end and a second contact switch, the second control end is connected with the controller, one end of the second contact switch is connected with the power supply, and the other end of the second contact switch is connected with a second end point of the contactor; when the controller determines that the water level height detected by the water level sensor meets the heating condition, the controller controls the two ends of the second contact switch to be conducted through the second control end of the second strong current switch so as to electrify the second endpoint.
Optionally, a temperature sensor is connected with the controller; when the controller detects that the water temperature information in the washing machine collected by the temperature sensor meets the preset temperature, the second endpoint of the contactor is controlled to be powered off.
According to a second aspect of embodiments of the present application, there is provided a washing machine including the drain control circuit of the first aspect applied to the washing machine.
In the technical scheme of the embodiment of the application, when the controller determines that the water level in the washing machine detected by the water level sensor meets the drainage condition or determines that the public end of the water level switch is communicated with the first connecting end, the second power end of the drainage pump is controlled to be electrified, so that the accuracy of the collected water level in the washing machine is improved through double detection of the water level switch and the water level sensor, and the problems that the drainage pump cannot be started when the water level in the washing machine is high due to the confirmation error of the water level, water in the washing machine overflows, family property loss of a user is caused, personal safety of the user is influenced and the like are avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
fig. 1 is a schematic configuration view of a drain control circuit applied to a washing machine according to an exemplary embodiment of the present application.
Fig. 2 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 1.
Fig. 3 is a schematic diagram of a drain control circuit applied to a washing machine according to still another embodiment of the present invention.
Fig. 4 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 3.
Fig. 5 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 4.
Fig. 6 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 5.
Fig. 7 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 6.
Fig. 8 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 7.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It should be noted that: references herein to "a plurality" means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
It should also be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features.
Fig. 1 is a schematic configuration view of a drain control circuit applied to a washing machine according to an exemplary embodiment of the present application. As shown in fig. 1, the drain control circuit includes a water level sensor 110, a water level switch 120, a drain pump 130, and a controller 140, and each will be described one by one.
The water level sensor 110 is used for collecting the water level height in the washing machine.
In an embodiment of the present application, the water level sensor 110 may employ a pressure water level sensor or an optical water level sensor.
The manner in which the water level sensor 110 collects the water level in the washing machine can be flexibly set according to needs, and in one example, the water level sensor 110 can collect the water level in the washing machine in real time so as to ensure that the current water level in the washing machine is timely obtained through real-time collection; in another example, the water level sensor 110 may periodically collect the water level in the washing machine, thereby achieving intermittent collection and extending the service life of the water level sensor 110.
The water level switch 120 includes a common terminal and a first connection terminal, and the common terminal is electrically connected to the power supply.
It should be noted that the water level switch 120 may be used to detect whether the water level in the washing machine reaches a designated water level. In the embodiment of the present application, the water level switch 120 may connect the common terminal with the first connection terminal when the water level in the washing machine satisfies the first preset height.
The first preset height is used for representing the water level height corresponding to the highest allowable water level in the washing machine.
When the water level in the washing machine meets the first preset level, the mode of connecting the public end of the water level switch 120 with the first connection end can be flexibly set according to the needs, in one example, the water level switch 120 can be connected with the air duct of the washing machine, and the air pressure in the air duct is correspondingly different due to the difference of the water level in the washing machine, so that when the water level reaches the first preset level, the air pressure in the air duct can push the public end of the water level switch 120, so that the public end of the water level switch 120 is connected with the first connection end.
In another example, the water level switch 120 is also connected to the air duct of the washing machine, and detects the air pressure in the air duct, and presets the designated air pressure range corresponding to the first preset height, so that when the water level in the washing machine reaches the first preset height, the air pressure in the air duct is located in the designated air pressure range, and thus, by detecting the air pressure in the air duct, it can be determined that the water level in the washing machine meets the first preset height, and the control public terminal is connected to the first connection terminal.
The drain pump 130 includes a first power source terminal and a second power source terminal, the first power source terminal is connected with the power source, and the drain pump 130 starts draining when the first power source terminal and the second power source terminal are simultaneously electrified.
In an embodiment of the present application, the drain pump 130 may employ a centrifugal pump or an axial flow pump. The drain pump 130 includes an input end for communicating with the inside of the washing machine and an output end for communicating with the drain pipe. After the drain pump 130 starts draining, water sucked into the washing machine through the input end of the drain pump 130 is conveyed to the output end, and then the water is drained through the drain pipe communicated with the output end, so that the aim of safely draining the water in the washing machine out of the washing machine is fulfilled.
And a controller 140 connected to the first connection terminals of the water level sensor 110 and the water level switch 120.
It should be noted that, the washing machine may be provided with a plurality of programs to control the washing process of the laundry, for example, when the water level in the washing machine meets the water level height corresponding to the water drainage condition, the water drainage program may be operated to drain the water in the washing machine; when the water level in the washing machine meets the water level corresponding to the heating condition, the heating program can be operated to heat the water in the washing machine.
In an embodiment of the present application, the controller 140 is used to store a plurality of programs preset for the washing machine and to control the operation or closure of the plurality of programs.
When the controller 140 determines that the water level in the washing machine detected by the water level sensor 110 satisfies the drainage condition, or determines that the common terminal of the water level switch 120 is connected to the first connection terminal, the second power terminal of the drain pump 130 is controlled to be energized.
The water draining condition is used for representing the preset water level height in the water draining program of the washing machine, so that when the water level height of the washing machine meets the preset water level height, the water draining program is operated to drain water.
Firstly, it should be noted that, in general, the water level sensor 110 is used in the washing machine to collect the water level in the washing machine, if the water level sensor 110 fails to detect abnormality, it may be determined that the water level in the washing machine does not meet the water level of the drainage condition in case that the water level in the washing machine is too high, and the drainage program cannot be operated to drain water, resulting in overflow of water in the washing machine, loss of user household property and influence on personal safety of the user; or in case that the water level in the washing machine is too low, it is determined that the water level in the washing machine satisfies the water level of the heating condition, and the heating program is operated to heat, resulting in problems such as dry heating of the heater 620 for heating.
Therefore, in the embodiment of the present application, when the controller 140 determines that the water level in the washing machine detected by the water level sensor 110 satisfies the drainage condition during the operation of the drainage program, the controller 140 controls the second power terminal of the drainage pump 130 to be energized so that the first terminal and the second terminal of the drainage pump 130 are energized simultaneously to start drainage, and in order to avoid the situation that the water level is not confirmed due to the detection failure of the water level sensor 110, the controller 140 controls the common terminal and the first connection terminal of the water level switch 120 to be energized simultaneously when the water level in the washing machine satisfies the first preset height during the operation of the drainage program, so that the second power terminal of the drainage pump 130 is also controlled to be energized simultaneously so that the first terminal and the second terminal of the drainage pump 130 are energized simultaneously to start drainage when the controller 140 determines that the common terminal and the first connection terminal of the water level switch 120 are energized.
In addition, the setting manner of the water level corresponding to the drainage condition may be flexibly set according to the need, and in one example, the water level corresponding to the drainage condition may be set to be the same as the water level corresponding to the first preset height, so as to ensure that the drainage pump 130 starts drainage in time when the water level in the washing machine reaches the water level corresponding to the highest allowable water level.
In another example, the water level corresponding to the drainage condition may be set to be lower than the water level of the first preset height, so that not only the water level in the washing machine can be ensured to be drained by starting the drainage pump 130 when the water level in the washing machine reaches the highest allowable water level, but also the water in the washing machine is ensured not to be overflowed easily; the controller 140 may further control the starting of the drain pump 130 to drain water in advance according to the drain program when determining that the water level in the washing machine detected by the water level sensor 110 meets the water level corresponding to the drain condition, thereby further ensuring that water in the washing machine is not easy to overflow.
Through the above embodiment, the controller 140 can perform dual detection through the water level switch 120 and the water level sensor 110 to improve the accuracy of the collected water level in the washing machine, so as to avoid the problems of water overflow in the washing machine, user household property loss, influence on the personal safety of the user, and the like caused by failure in confirmation of the water level, which results in failure in starting the drain pump 130 when the water level in the washing machine is higher.
Fig. 2 is a schematic diagram of another drain control circuit 100 applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 1.
As shown in fig. 2, the first connection terminal of the water level switch 120 is also connected to the second power terminal of the drain pump 130.
Because the water level in the washing machine reaches the highest allowable water level, that is, the possibility that the water in the current washing machine overflows the washing machine is extremely high, in the embodiment of the application, the first connection end of the water level switch 120 is also connected with the second power end of the drainage pump 130, so that when the first preset height is the highest allowable water level, the drainage pump 130 can be started to drain when the controller 140 determines that the public end of the water level switch 120 is communicated with the first connection end, not only can the connection between the first connection end and the controller 140 be facilitated; the first connection end can also directly supply power to the second power end of the drain pump 130, so that the drain pump 130 is started to drain water in time without being controlled by the controller 140, and the possibility that water in the washing machine overflows the washing machine is reduced.
Fig. 3 is a schematic diagram of another drain control circuit 100 applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 2. As shown in fig. 3, the drainage control circuit 100 further includes a first strong electric switch 310.
The first strong electric switch 310 includes a first control terminal and a first contact switch. The first control terminal is connected to the controller 140. One end of the first contact switch is connected to the power source, and the other end of the first contact switch is connected to the second power source end of the drain pump 130.
In an embodiment of the present application, the first heavy-current switch 310 includes, but is not limited to, a relay or a thyristor. In addition, the first contact switch of the first strong electric switch 310 is turned on and off under the control of the first control terminal.
When the controller 140 determines that the water level sensor 110 detects that the water level in the washing machine satisfies the drainage condition, or determines that the common terminal of the water level switch 120 is turned on with the first connection terminal, the first control terminal of the first strong electric switch 310 controls the two terminals of the first contact switch to be turned on, so that the second power terminal is powered on.
It should be noted that, the higher the drainage efficiency of the drainage pump 130, the higher the corresponding power thereof; and the higher power drain pump 130 generates a lot of current during operation, which causes the copper foil of the circuit board through which the operating current of the drain pump 130 flows to generate higher heat, resulting in a decrease in the service life of the circuit board.
In the embodiment of the present application, when the controller 140 determines that the water level sensor 110 detects that the water level in the washing machine meets the drainage condition, or determines that the common terminal of the water level switch 120 is connected to the first connection terminal, the controller 140 may control the first strong current switch 310 through the connection with the first control terminal of the first strong current switch 310, so that both ends of the first contact switch of the first strong current switch 310 are connected, and the second power terminal is electrified through the first strong current switch 310, thereby controlling the drain pump 130 to start drainage, further achieving the purpose that the working current of the drain pump 130 does not pass through the controller 140, and the controller 140 can also control the on/off of the drain pump 130, so that the controller 140 is not susceptible to the influence of the working current of the drain pump 130, thereby resulting in a reduced service life.
Fig. 4 is a schematic diagram of another drain control circuit 100 applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 3. As shown in fig. 4, the drainage control circuit 100 further includes a first detection module 410 and a second detection module 420.
An input end of the first detection module 410 is connected to the water level sensor 110, and an output end of the first detection module 410 is connected to the controller 140.
In an embodiment of the present application, the water level collected by the water level sensor 110 may be obtained through the first detection module 410, and it is determined whether the water level satisfies the drainage condition, and if the first detection module 410 determines that the water level in the washing machine satisfies the drainage condition, a signal for indicating that the water level in the washing machine satisfies the drainage condition is transmitted to the controller 140 through the connection with the controller 140, so that the controller 140 controls the second power terminal of the drain pump 130 to be powered on in response to the signal.
The first detection module 410 may be flexibly configured according to the need in a manner of determining whether the water level in the washing machine satisfies the drainage condition according to the water level collected by the water level sensor 110. In one example, the time delay confirmation time may be set so as to time when the first detection module 410 determines that the water level in the washing machine detected by the water level sensor 110 satisfies the drainage condition, and if the time delay confirmation time is reached, the first detection module 410 still determines that the water level in the washing machine detected by the water level sensor 110 satisfies the drainage condition, the first detection module 410 sends a signal for indicating that the water level in the washing machine satisfies the drainage condition to the controller 140, so as to avoid that the controller 140 runs the drainage program to control the second power supply terminal of the drainage pump 130 to be electrified when the water level in the washing machine does not satisfy the drainage condition due to short fluctuation of the water level in the washing machine detected by the water level sensor 110, so that the drainage pump 130 drains when the water level in the washing machine does not satisfy the drainage condition, and the cleaning effect of the washing machine to wash laundry is reduced.
In another example, the number of times of satisfaction may be set so as to count when the first detection module 410 determines that the water level in the washing machine detected by the water level sensor 110 satisfies the drainage condition, and when the count reaches the number of times of satisfaction, the first detection module 410 transmits a signal for indicating that the water level in the washing machine satisfies the drainage condition to the controller 140, and also for avoiding the controller 140 from controlling the second power supply terminal to be energized when the water level in the washing machine detected by the water level sensor 110 temporarily fluctuates, so that the drain pump 130 drains water when the water level in the washing machine does not satisfy the drainage condition.
The input end of the second detection module 420 is connected to the first connection end of the water level switch 120, and the output end of the second detection module 420 is connected to the controller 140.
In an embodiment of the present application, it may be determined whether the common terminal of the water level switch 120 is in conduction with the first connection terminal through the second detection module 420, and if the second detection module 420 determines that the common terminal of the water level switch 120 is in conduction with the first connection terminal, a signal indicating that the common terminal of the water level switch 120 is in conduction with the first connection terminal is transmitted to the controller 140 through the connection with the controller 140, so that the controller 140 controls the second power terminal of the drain pump 130 to be powered on in response to the signal.
The second detection module 420 may refer to the setting manner of the first detection module 410, that is, by setting a delay confirmation time, so that when the common end of the water level switch 120 is conducted with the first connection end, timing is started, if the timing time reaches the preset delay confirmation time, a signal for indicating that the common end of the water level switch 120 is conducted with the first connection end is sent to the controller 140 through connection with the controller 140, so that the controller 140 controls the second power end of the water pump 130 to be electrified in response to the signal, thereby avoiding that when the water level in the washing machine fluctuates briefly, the common end of the water level switch 120 is conducted with the first connection end, causing the controller 140 to operate a water drainage program to control the second power end of the water pump 130 to be electrified, and causing the water pump 130 to drain when the water level in the washing machine does not meet the water drainage condition, and further causing the cleaning effect of the washing machine to be reduced.
Through the above embodiment, the first detection module 410 is used to process the water level collected by the water level sensor 110, and the second detection module 420 is used to determine whether the common end of the water level switch 120 is connected to the first connection end, so that the controller 140 does not need to process the water level collected by the water level sensor 110 and determine whether the common end of the water level switch 120 is connected to the first connection end under the transient fluctuation of the water level in the washing machine on the premise of improving the control accuracy of the drainage control circuit, thereby reducing the processing procedure of the controller 140 and reducing the occupation of the operation resource of the controller 140.
Fig. 5 is a schematic diagram of another drain control circuit applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 4.
As shown in fig. 5, the water level switch 120 further includes a second connection terminal. The second connection is connected to the controller 140. When the water level in the washing machine meets the second preset height, the public end is communicated with the second connecting end. Wherein the second preset height is smaller than the first preset height.
In the embodiment of the present application, when the water level in the washing machine rises to the second preset level or when the water level in the washing machine falls to the second preset level, the common terminal of the water level switch 120 is connected to the second connection terminal, i.e., the common terminal of the water level switch 120 is connected to the second connection terminal.
When the controller 140 detects that the common terminal is connected to the second connection terminal, it controls the second power terminal of the drain pump 130 to be powered off.
When the water level sensor 110 fails to detect an abnormality, the controller 140 further controls the second power terminal of the drain pump 130 to be always energized, so that the water level detected by the water level sensor 110 always satisfies the drain condition.
Therefore, in the embodiment of the present application, the controller 140 may determine whether the common terminal and the second sensing terminal are turned on through the connection with the second connection terminal to control the second power terminal of the drain pump 130 to be turned off when the water level in the washing machine is low. That is, when the water level in the washing machine satisfies the second preset level, the common terminal of the water level switch 120 is connected to the second connection terminal, and the controller 140 controls the second power terminal of the drain pump 130 to be powered off when detecting that the common terminal is connected to the second connection terminal, so as to avoid the controller 140 from continuously controlling the second power terminal of the drain pump 130 to be powered on.
The power supply for providing electric energy applied to the drainage control circuit of the washing machine can adopt a three-phase power supply or a single-phase power supply.
The three-phase power supply comprises three fire wire ends, a zero wire end and a grounding end. The three-phase power supply may be connected, in one example, by supplying power to the controller 140 through one of three terminals, and the other two terminals supply power to the drain pump 130; the controller 140 and the drain pump 130 share a neutral line terminal of the three-phase power supply; thereby distinguishing the operating currents of the controller 140 and the drain pump 130.
The single-phase power supply comprises a fire wire end, a zero wire end and a grounding end. In one example, one live wire end can be separated into three sub-live wire ends by a branching device, so that one of the three sub-live wire ends can supply power to the controller 140, and the other two sub-live wire ends supply power to the drainage pump 130; the controller 140 and the drain pump 130 share a neutral line terminal of the single-phase power supply; to distinguish the operating currents of the controller 140 and the drain pump 130.
Fig. 6 is a schematic diagram of another drain control circuit 100 applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 5.
As shown in fig. 6, the water level switch 120 further includes a third connection terminal.
In the embodiment of the present application, when the water level in the washing machine satisfies the third preset level, the common terminal is connected to the third connection terminal, that is, when the water level in the washing machine rises to the third preset level, or when the water level in the washing machine drops to the third preset level, the common terminal of the water level switch 120 is connected to the third connection terminal, that is, the common terminal of the water level switch 120 is connected to the third connection terminal.
The drain control circuit 100 shown in fig. 6 further includes a contactor 610 and a heater 620.
The contactor 610 includes a first terminal connected to the third connection terminal of the water level switch 120 and a second terminal connected to the controller 140.
It should be noted that the contactor 610 generally includes a coil, a metal spring, a connecting rod, an input end and an output end. The contactor 610 works by energizing both ends of the coil to make both ends of the coil conduct to generate a magnetic field to attract the metal spring to generate displacement, and meanwhile, the metal spring also drives the connecting rod to move, so that the input end and the output end are connected through the connecting rod.
In the embodiment of the present application, the first terminal and the second terminal are two terminals of the coil in the contactor 610, that is, the contactor 610 is turned on when the first terminal and the second terminal are simultaneously energized, that is, the input terminal and the output terminal of the contactor 610 are turned on.
The heater 620 is used to heat water in the washing machine.
In an embodiment of the present application, the heater 620 is connected to the contactor 610 and starts heating when the contactor 610 is turned on.
In one example, the heater 620 may be disposed at an output end of the contactor 610, and a power is turned on at an input end of the contactor 610, so that when two ends of a coil of the contactor 610 are turned on, that is, when a first end and a second end of the contactor 610 are simultaneously turned on, the input end and the output end are connected through a connecting rod, so that the heater 620 is turned on to heat when the contactor 610 is turned on.
When the controller 140 determines that the water level height detected by the water level sensor 110 satisfies the heating condition, the second end point of the contactor 610 is controlled to be energized.
Wherein the heating conditions include, but are not limited to, heating temperature and water level height.
In the embodiment of the present application, the controller 140 controls the second terminal of the contactor 610 to be energized when the controller 140 determines that the water level sensor 110 detects that the water level in the washing machine satisfies the heating condition in the course of controlling the operation of the heating program, and the heater 620 needs to be started to heat when the first terminal and the second terminal of the contactor 610 are simultaneously energized to be turned on. If the water level in the washing machine does not meet the third preset height of the water level switch 120, it indicates that the current water level in the washing machine does not meet the heating condition for starting the heater 620, the common end of the water level switch 120 will not be connected with the third connection end, and accordingly, the first end of the contactor 610 will not be powered on, and the heater 620 will not be started, thereby avoiding the dry burning of the heater 620 due to the detection failure of the water level sensor 110.
The water level of the third preset height may be flexibly set according to needs, and in one example, the water level of the third preset height may be set to the water level of the first preset height, or the water level of the third preset height may be set to the water level of the second preset height, where the water levels corresponding to the first preset height and the second preset height are not easy to cause dry burning of the heater 620. In another example, the water level of the third preset height may be set between the first preset height and the second preset height, that is, the third preset height is smaller than the first preset height and the third preset height is larger than the second preset height, so that it is not necessary to raise the water level in the washing machine to the highest allowable water level and then heat the water without ensuring that the corresponding water level is not liable to cause dry heating of the heater 620.
In addition, the setting manner of the water level height corresponding to the heating condition may be flexibly set according to needs, and in one example, the water level height corresponding to the heating condition may be set to be the same as the water level height corresponding to the third preset height, so as to ensure that the heater 620 is not easily started when the water level height in the washing machine is too low.
In another example, the water level height corresponding to the heating condition may be set to be higher than the water level height of the third preset height, so that not only can the water level height of the third preset height ensure that the water level height in the washing machine meets the minimum water level requirement for heating by the heater 620, but also the heater 620 is not easy to start when the water level height in the washing machine is too low; the controller 140 may also be further configured to, when determining that the water level in the washing machine detected by the water level sensor 110 meets the water level corresponding to the heating condition, control the second end of the contactor 610 to be energized, and since the current water level has met the third preset height, enable the first end of the contactor 610 to be continuously energized, so that when the water level in the washing machine meets the water level of the heating condition, the controller 140 may timely control the heater 620 to heat according to the heating program, thereby shortening the time for the heater 620 to heat the water.
Through the above embodiment, when the controller 140 determines that the water level detected by the water level sensor 110 meets the heating condition and needs to control the heater 620 to heat, the controller 140 can control the heater 620 to be electrified and started to heat only on the premise that the water level in the washing machine meets the third preset height and the common end of the water level switch 120 is conducted with the third connection end, so that the problem that the heater 620 is started to burn dry when the water level in the washing machine is low due to the detection failure of the water level sensor 110 is avoided.
Fig. 7 is a schematic diagram of another drain control circuit 100 applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 6. As shown in fig. 7, the drainage control circuit 100 further includes a second strong electric switch 710.
The second strong electric switch 710 includes a second control terminal and a second contact switch. The second control terminal is connected to the controller 140. One end of the second contact switch is connected to the power source, and the other end of the second contact switch is connected to the second terminal of the contactor 610.
In an embodiment of the present application, the second contact switch of the second strong electric switch 710 is turned on and off under the control of the second control terminal.
When the controller 140 determines that the water level sensor 110 detects that the water level in the washing machine satisfies the heating condition, the control terminal of the second strong electric switch 710 controls the two ends of the second contact switch to be turned on, so that the second terminal is energized.
It should be noted that, the higher the heating temperature of the heater 620, the higher the corresponding power thereof; and the higher power heater 620 also generates a lot of current during operation, resulting in higher heat generated by the copper foil of the circuit board through which the operating current of the heater 620 flows, resulting in a reduced service life of the circuit board.
In the embodiment of the present application, when the controller 140 determines that the water level sensor 110 detects that the water level in the washing machine meets the heating condition, the controller 140 may control the second strong electric switch 710 through the connection with the second control end of the second strong electric switch 710, so that both ends of the second contact switch of the second strong electric switch 710 are turned on, and the second end is turned on through the second strong electric switch 710, so that when the first end of the contactor 610 is turned on, the heater 620 is controlled to start heating, and further the purpose that the working current of the heater 620 does not pass through the controller 140 is achieved, and the controller 140 can also control the on/off of the heater 620, so that the controller 140 is not easy to be affected by the working current of the heater 620, and the service life is reduced.
Fig. 8 is a schematic diagram of another drain control circuit 100 applied to a washing machine, which is proposed on the basis of the embodiment shown in fig. 7. As shown in fig. 8, the drain control circuit 100 further includes a temperature sensor 810. The temperature sensor 810 is used to collect water temperature information in the washing machine. Wherein the water temperature information characterizes a temperature value of water in the washing machine.
In an embodiment of the present application, the temperature sensor 810 may employ a high-precision temperature sensor with 0.1 ℃ as a measurement precision, including: thermocouple, thermistor, platinum Resistance (RTD), and temperature IC. Such as: the thermistor is made of semiconductor materials, and most of the thermistor has a negative temperature coefficient, namely the resistance value is reduced along with the temperature increase, and the temperature change can cause large resistance value change, so that the thermistor is a very sensitive temperature sensor.
The temperature sensor 810 is connected to the controller 140. When the controller 140 detects that the water temperature information in the washing machine collected by the temperature sensor 810 satisfies the preset temperature, the second end point of the contactor 610 is controlled to be powered off.
The preset temperature is used for representing the preset heating temperature when the clothes to be washed are washed in the heating program.
In the embodiment of the present application, after the first end point and the second end point of the contactor 610 are simultaneously turned on, the heater 620 is started to start heating, and along with the continuous heating of the heater 620, the water temperature in the washing machine is also continuously increased, so that when the controller 140 detects that the water temperature information in the washing machine collected by the temperature sensor 810 meets the preset temperature, it indicates that the temperature of the water in the current washing machine reaches the preset heating temperature when the laundry is washed in the heating program, the second end point of the contactor 610 is controlled to be turned off, so as to control the heater 620 to be turned off and stop heating, and further ensure that the water temperature in the washing machine is not easy to be too high, thereby damaging the laundry to be washed.
The embodiment of the application also provides a washing machine, which comprises the drainage control circuit.
When the water in the washing machine needs to be discharged during the washing process of the clothes to be washed, the controller 140 in the water discharge control circuit controls the second power end of the water discharge pump 130 to be electrified when the controller 140 determines that the water level height detected by the water level sensor 110 meets the water level height of the water discharge condition, or when the controller 140 determines that the common end of the water level switch 120 is communicated with the first connection end. The water level sensor 110 with higher precision is adopted to collect the water level in the washing machine, and the water level switch 120 is adopted to assist in judging the water level in the washing machine, so that the accuracy of the collected water level in the washing machine is improved, and the problems that the water pump 130 cannot be started when the water level in the washing machine is higher due to the confirmation error of the water level, water in the washing machine overflows, the household property loss of a user is caused, the personal safety of the user is influenced and the like are avoided.
As another aspect, the present application also provides a computer-readable storage medium, which may be included in the washing machine described in the above embodiments; or may exist alone without being assembled into the washing machine. The computer-readable storage medium carries one or more programs that, when executed by one of the electronic devices, cause the electronic device to implement the control program executed by the controller in the above embodiment.
It should be noted that although several modules or units of the drain control circuit are mentioned in the above detailed description, this division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (7)

1. A drain control circuit for a washing machine, the drain control circuit comprising:
a water level sensor;
the water level switch comprises a public end, a first connecting end, a second connecting end and a third connecting end, wherein the public end is connected with a power supply, and when the water level in the washing machine meets a first preset height, the public end is communicated with the first connecting end, and the first preset height represents the water level corresponding to the highest allowable water level in the washing machine;
the drainage pump comprises a first power end and a second power end, the first power end is connected with the power supply, and the drainage pump starts drainage when the first power end and the second power end are electrified at the same time;
The controller is connected with the water level sensor, the second connecting end and the first connecting end of the water level switch, and when the controller determines that the water level in the washing machine detected by the water level sensor meets a drainage condition or determines that the public end of the water level switch is communicated with the first connecting end, the controller controls the second power end of the drainage pump to be electrified, and the water level corresponding to the drainage condition is lower than the water level of the first preset height;
The first strong current switch comprises a first control end and a first contact switch, the first control end is connected with the controller, one end of the first contact switch is connected with the power supply, and the other end of the first contact switch is connected with a second power supply end of the drainage pump;
When the controller determines that the water level sensor detects that the water level in the washing machine meets a drainage condition or determines that the common end of the water level switch is conducted with the first connecting end, the controller controls the conduction of the two ends of the first contact switch through the first control end of the first strong electric switch so as to electrify the second power end;
When the water level in the washing machine meets a second preset height, the public end is communicated with the second connecting end; wherein the second preset height is smaller than the first preset height;
when the controller detects that the public end is conducted with the second connecting end, the controller controls the second power end of the drainage pump to be powered off;
When the water level in the washing machine meets a third preset height, the public end is communicated with the third connecting end;
the drainage control circuit further comprises a contactor and a heater, wherein the contactor comprises a first end point and a second end point, the first end point is connected with a third connecting end of the water level switch, the second end point is connected with the controller, and the contactor is conducted when the first end point and the second end point are simultaneously electrified;
The heater is connected with the contactor, and heating is started when the contactor is conducted;
And when the controller determines that the water level height detected by the water level sensor meets the heating condition, the controller controls the second endpoint of the contactor to be electrified.
2. The drain control circuit of claim 1, wherein the first connection terminal of the water level switch is further connected to the second power terminal of the drain pump.
3. The drain control circuit according to any one of claims 1 to 2, further comprising:
The input end of the first detection module is connected with the water level sensor, and the output end of the first detection module is connected with the controller;
The input end of the second detection module is connected with the first connecting end of the water level switch, and the output end of the second detection module is connected with the controller.
4. The drain control circuit of claim 1, wherein the power source comprises a three-phase power source or a single-phase power source.
5. The drain control circuit of claim 1, wherein the drain control circuit further comprises:
The second strong current switch comprises a second control end and a second contact switch, the second control end is connected with the controller, one end of the second contact switch is connected with the power supply, and the other end of the second contact switch is connected with a second endpoint of the contactor;
When the controller determines that the water level height detected by the water level sensor meets the heating condition, the controller controls the two ends of the second contact switch to be conducted through the second control end of the second strong current switch so as to electrify the second endpoint.
6. The drain control circuit of claim 1, wherein the drain control circuit further comprises:
the temperature sensor is connected with the controller;
When the controller detects that the water temperature information in the washing machine collected by the temperature sensor meets the preset temperature, the second endpoint of the contactor is controlled to be powered off.
7. A washing machine comprising a drain control circuit as claimed in any one of claims 1 to 6.
CN202211230942.XA 2022-09-30 2022-09-30 Water discharge control circuit applied to washing machine and washing machine Active CN115418830B (en)

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CN1904188B (en) * 2005-07-29 2010-08-25 海尔集团公司 Washing method and control device of water saving washing machine
CN105648699B (en) * 2014-11-17 2018-04-20 无锡飞翎电子有限公司 Roller washing machine and its control method
CN107190481B (en) * 2017-04-25 2020-02-21 无锡飞翎电子有限公司 Washing machine and draining pump system thereof
CN114108240B (en) * 2020-08-27 2023-03-07 无锡小天鹅电器有限公司 Heating control method and device, clothes treatment equipment and storage medium
CN214694731U (en) * 2021-01-05 2021-11-12 海信（山东）冰箱有限公司 Washing machine

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CN104862927A (en) * 2014-02-26 2015-08-26 无锡小天鹅股份有限公司 Upward-drainage washing machine and water level control method thereof

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