CN115404656A - Heating control circuit applied to washing machine and washing machine - Google Patents
Heating control circuit applied to washing machine and washing machine Download PDFInfo
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- CN115404656A CN115404656A CN202211204992.0A CN202211204992A CN115404656A CN 115404656 A CN115404656 A CN 115404656A CN 202211204992 A CN202211204992 A CN 202211204992A CN 115404656 A CN115404656 A CN 115404656A
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- 238000005406 washing Methods 0.000 title claims abstract description 155
- 238000010438 heat treatment Methods 0.000 title claims abstract description 154
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 236
- 238000001514 detection method Methods 0.000 claims description 36
- 238000009841 combustion method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 17
- 238000004140 cleaning Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000012790 confirmation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- 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
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The embodiment of the application provides a be applied to washing machine's heating control circuit and washing machine, and the heating control circuit includes: a water level sensor; the water level switch comprises a public end and a first connecting end, the public end is connected with the power supply, and when the height of the water level in the washing machine meets a first preset height, the public end is conducted with the first connecting end; the contactor comprises a first endpoint and a second endpoint, the first endpoint is connected with the first connecting end of the water level switch, and the contactor is conducted when the first endpoint and the second endpoint are simultaneously electrified; the controller is connected with the water level sensor and the second end point of the contactor; the heater is connected with the contactor and starts heating when the contactor is switched on; and when the controller determines that the water level height in the washing machine detected by the water level sensor meets the heating condition, the second end point of the contactor is controlled to be electrified. The technical scheme of this application embodiment can avoid because when level sensor detects the trouble, the condition that the start-up heater leads to the heater dry combustion method to appear.
Description
Technical Field
The application relates to the technical field of electromechanical control, in particular to a heating control circuit applied to a washing machine and the washing machine.
Background
With the improvement of living standard of people, it is a washing mode frequently used by people to wash clothes by adopting washing machine equipment. In the related art, in the process of cleaning the laundry, the washing machine generally heats water in the washing machine through the heater to improve the cleaning effect of the washing machine on the laundry, and meanwhile, in order to avoid dry burning of the heater, the washing machine generally sets the water level sensor to acquire the water level height in the washing machine, so as to restart the heater to heat the laundry when it is determined that the acquired water level height in the washing machine meets a certain condition. However, if the water level sensor fails to detect the abnormal water level, the water level in the washing machine is judged to meet the water level corresponding to a certain condition under the condition that the water level in the washing machine is too low, and the heater is started to heat, so that the heater is dried, and safety accidents are caused.
Disclosure of Invention
In order to solve the above technical problem, embodiments of the present application provide a heating 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 heating 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, the public end is connected with a power supply, and when the height of the water level in the washing machine meets a first preset height, the public end is conducted with the first connecting end; the contactor comprises a first end point and a second end point, the first end point is connected with a first connecting end of the water level switch, and the contactor is conducted when the first end point and the second end point are electrified simultaneously; the controller is connected with the water level sensor and the second end point of the contactor; the heater is connected with the contactor and starts heating when the contactor is conducted; and when the controller determines that the water level height in the washing machine detected by the water level sensor meets the heating condition, controlling the second end point of the contactor to be electrified.
Optionally, the heater comprises a plurality of heating wires; the contactor comprises a plurality of second end points, and the second end points correspond to the heating wires one by one; and when the controller determines that the water level height detected by the water level sensor meets the heating condition, determining a target second endpoint according to the heating condition, and controlling the target second endpoint to be electrified.
Optionally, the heater comprises a plurality of heating wires; the contactor is provided with a plurality of contactors, the contactors correspond to the heating wires one by one, a first end point of each contactor is connected with a first connecting end of the water level switch, and a second end point of each contactor is connected with the controller; and when the controller determines that the water level height detected by the water level sensor meets the heating condition, determining a target contactor according to the heating condition, and controlling the second end point of the target contactor to be electrified.
Optionally, the high-voltage switch includes a control end and a contact switch, the control end is connected to the controller, one end of the contact switch is connected to the power supply, and the other end of the contact switch is connected to the second end of the contactor; and when the controller determines that the water level sensor detects that the water level height in the washing machine meets the heating condition, the controller controls the conduction of two ends of the contact switch through the control end of the strong electric switch so as to electrify the second end point.
Optionally, the water level switch further includes a second connection end, the second connection end is connected to the controller, and when the water level height in the washing machine satisfies a second preset height, the common end is conducted 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 second end point of the contactor is controlled to be powered off.
Optionally, a temperature sensor connected to the controller; and when the controller detects that the water temperature information in the washing machine collected by the temperature sensor meets a preset temperature, controlling the second endpoint of the contactor to be powered off.
Optionally, the input end of the first detection module is connected to the temperature sensor, and the output end of the first detection module is connected to the controller.
Optionally, the power supply comprises a three-phase power supply or a single-phase power supply.
Optionally, the input end of the second detection module is connected to the water level sensor, and the output end of the second detection module is connected to the controller.
According to a second aspect of embodiments of the present application, there is provided a washing machine including the heating control circuit applied to the washing machine of the first aspect described above.
In the technical scheme of this application embodiment, through being connected between the first termination of water level switch and the first termination of contactor, and be connected between the second termination of controller and contactor, make the controller confirm that water level sensor detects the water level height in the washing machine and satisfies the heating condition, when needing to start the heater and heat, only can highly satisfy first height of predetermineeing at the water level in the washing machine, when making the public end of water level switch and first termination switch on, the controller just can be through the second termination circular telegram of control contactor, make the first termination and the second termination of contactor circular telegram simultaneously switch on, thereby make the heater start-up heating that heats when the contactor switches on, and then when avoiding because water level sensor detects the trouble, start the heater and lead to the condition that the heater appears dry combustion.
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 obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of a heating control circuit applied to a washing machine according to an exemplary embodiment of the present application.
Fig. 2 is a schematic structural diagram of another heating control circuit applied to a washing machine based on the embodiment shown in fig. 1.
Fig. 3 is a schematic structural diagram of another heating control circuit applied to a washing machine based on the embodiment shown in fig. 1.
Fig. 4 is a schematic structural diagram of another heating control circuit applied to a washing machine based on the embodiment shown in fig. 1.
Fig. 5 is a schematic structural diagram of another heating control circuit applied to the washing machine based on the embodiment shown in fig. 4.
Fig. 6 is a schematic structural diagram of another heating control circuit applied to a washing machine based on the embodiment shown in fig. 5.
Fig. 7 is a schematic structural diagram of another heating control circuit applied to the washing machine based on the embodiment shown in fig. 6.
Fig. 8 is a schematic structural diagram of another heating control circuit applied to the washing machine based on the embodiment shown in fig. 7.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 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 subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to 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 actual execution sequence may be changed according to the actual situation.
It should be noted that: reference herein to "a plurality" means two or more. "and/or" describe the association relationship of the associated objects, meaning that there may be three relationships, e.g., A and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It should also be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features.
Fig. 1 is a schematic structural diagram of a heating control circuit applied to a washing machine according to an exemplary embodiment of the present application. As shown in fig. 1, the heating control circuit 100 includes a water level sensor 110, a water level switch 120, a contactor 130, a controller 140, and a heater 150, and each of which will be described below.
And a water level sensor 110 for collecting a water level in the washing machine.
In the embodiment of the present application, the water level sensor 110 may employ a pressure water level sensor or an optical water level sensor.
The mode of acquiring the water level height in the washing machine by the water level sensor 110 can be flexibly set according to needs, and in one example, the water level sensor 110 can acquire the water level height in the washing machine in real time so as to ensure that the current water level height in the washing machine is acquired in time through real-time acquisition; in another example, the water level sensor 110 may periodically collect the water level in the washing machine, thereby achieving intermittent collection and prolonging 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 a power source.
It should be noted that the water level switch 120 can be used to detect whether the water level in the washing machine reaches a specified 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 inside the washing machine satisfies a first preset height.
When the water level height in the washing machine meets the first preset height, the mode of connecting the public end of the water level switch 120 with the first connecting end can be flexibly set as required, in one example, the water level switch 120 can be connected with the air duct of the washing machine, and due to the difference of the water level height in the washing machine, the air pressure in the air duct is correspondingly different, so that when the water level height reaches the first preset height, the air pressure in the air duct can push the public end of the water level switch 120, and the public end of the water level switch 120 is connected with the first connecting 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 a specified air pressure range corresponding to the first preset height is preset, so that when the water level height in the washing machine reaches the first preset height, the air pressure in the air duct is located in the specified air pressure range, and thus the water level height in the washing machine can be determined to meet the first preset height by detecting the air pressure in the air duct, and the common terminal is controlled to be connected to the first connection terminal.
The contactor 130 includes a first terminal and a second terminal, and the first terminal is connected to the first connection terminal of the level switch 120.
It should be noted that the contactor 130 generally includes a coil, a metal spring, a connecting rod, an input end and an output end. The contactor 130 is operated by electrifying the two ends of the coil, so that the two ends of the coil are conducted to generate a magnetic field to attract the metal spring plate to generate displacement, and the metal spring plate generates displacement and simultaneously drives the connecting rod to move, so that the input end is connected with the output end 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 130, that is, the contactor 130 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 130 are turned on.
And a controller 140 connected to the water level sensor 110 and the second terminal of the contactor 130.
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 satisfies the water level corresponding to the heating condition, the heating program may be operated to heat the water in the washing machine; when the water level height in the washing machine meets the water level height corresponding to the drainage condition, the drainage program can be operated to drain the water in the washing machine.
In an embodiment of the present application, the controller 140 serves to store a plurality of programs preset for the washing machine and to control the operation or shutdown of the plurality of programs.
And a heater 150 for heating water in the washing machine.
In the embodiment of the present application, the heater 150 is connected to the contactor 130, and starts heating when the contactor 130 is turned on.
In one example, the heater 150 may be disposed at an output end of the contactor 130, and a power supply may be connected to an input end of the contactor 130, so that when two ends of the coil of the contactor 130 are turned on, that is, when the first end point and the second end point of the contactor 130 are simultaneously powered on, the input end and the output end are connected through a connecting rod, so that the heater 150 is powered on and activated to heat when the contactor 130 is turned on.
The controller 140 controls the second terminal of the contactor 130 to be energized when it is determined that the water level height in the washing machine detected by the water level sensor 110 satisfies the heating condition.
Wherein, the heating conditions include, but are not limited to, heating temperature and water level height.
Firstly, it should be noted that, in general, the washing machine adopts the water level sensor 110 to collect the water level height in the washing machine, if the water level sensor 110 is out of order to cause detection abnormality, it may be determined that the water level height in the washing machine meets the water level height of the heating condition under the condition that the water level height in the washing machine is too low, and the heating program is operated to heat, so that the heater 150 for heating is dried; or under the condition that the water level in the washing machine is too high, the water level in the washing machine is judged to be not satisfied with the water level of the drainage condition, the drainage program cannot be operated to drain water, and the water in the washing machine overflows, so that the problems of household property loss of a user, influence on the personal safety of the user and the like are caused.
Therefore, 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 satisfies the heating condition during the operation of the heating program, the controller 140 controls the second terminal of the contactor 130 to be energized, and the heater 150 needs to be energized and conducted at the same time when the first terminal and the second terminal of the contactor 130 are energized and conducted. If the water level in the washing machine does not meet the first 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 150, the common end of the water level switch 120 is not conducted with the first connection end, and accordingly, the first end point of the contactor 130 is not electrified, and the heater 150 is not started, thereby avoiding the dry burning of the heater 150 caused by the fault detection of the water level sensor 110.
In addition, the setting mode of the water level height corresponding to the heating condition can be flexibly set as required, and in one example, the water level height corresponding to the heating condition can be set to be the same as the water level height corresponding to the first preset height, so as to ensure that the heater 150 is not easy to start 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 a first preset height, which not only can ensure that the water level height in the washing machine meets the minimum water level requirement for heating by the heater 150 through the water level height of the first preset height, but also ensure that the heater 150 is not easy to start when the water level height in the washing machine is too low; it is also possible to cause the controller 140 to energize by controlling the second end of the contactor 130 when it is determined that the water level in the washing machine detected by the water level sensor 110 satisfies the water level corresponding to the heating condition, because the current water level has satisfied the first preset height, the first end of the contactor 130 is continuously energized, so that when the water level in the washing machine satisfies the water level of the heating condition, the controller 140 may timely control the heater 150 to heat according to the heating program, thereby shortening the time for the heater 150 to heat the water.
Through the above embodiment, when the controller 140 determines that the water level height detected by the water level sensor 110 satisfies the heating condition and the heater 150 needs to be controlled to heat, the controller 140 can control the heater 150 to be powered on to start heating only on the premise that the water level height in the washing machine satisfies the first preset height and the common end of the water level switch 120 is connected to the first connection end, thereby avoiding the problem that the heater 150 is dried due to the fact that the heater 150 is started when the water level height in the washing machine is low due to the detection fault of the water level sensor 110.
Fig. 2 is a schematic structural diagram of another heating control circuit 100 applied to a washing machine, which is based on the embodiment shown in fig. 1. As shown in fig. 2, the heater 150 includes a plurality of heating wires, and the contactor 130 includes a plurality of second terminals in one-to-one correspondence with the plurality of heating wires.
It should be noted that, when different types of laundry are washed, the corresponding optimal washing temperatures are different, wherein the optimal washing temperature represents the water temperature at which the cleaning effect of the laundry is optimal. Therefore, the washing machine can set the heating temperature to the optimal washing temperature of the type of clothes to be washed when the different types of clothes to be washed are washed, thereby improving the cleaning effect of the clothes to be washed.
Therefore, in order to enhance the cleaning effect of the laundry to be washed, in the embodiment of the present application, when it is determined by the controller 140 that the height of the water level detected by the water level sensor 110 satisfies the heating condition, the target second endpoint is determined according to the heating condition, and the target second endpoint is controlled to be powered on.
The manner of determining the target second endpoint according to the heating conditions, in one example, the heater 150 includes a first heating wire and a second heating wire, the first heating wire corresponds to a heating temperature range of 0-50 ℃, and the second heating wire corresponds to a heating temperature range of 50-90 ℃; the target second endpoint is determined by determining the heating temperature range of the heating temperature corresponding to the heating condition, that is, when the temperature corresponding to the heating condition is 40 ℃, it can be determined that the temperature of the heating condition is in the temperature range corresponding to the first heating wire, and the second endpoint corresponding to the first heating wire is taken as the target second endpoint, so that after the target second endpoint is controlled to be electrified, water in the washing machine is heated by the first heating wire, and after the water in the washing machine is heated by the heater 150, the water is kept at the optimal washing temperature corresponding to the clothes to be washed, thereby realizing the improvement of the cleaning effect of the clothes to be washed.
In order to achieve the above-mentioned effects, the embodiment of the present application further provides another heating control circuit 100 applied to a washing machine, and referring to the structural schematic diagram shown in fig. 3, a heater 150 includes a plurality of heating wires. The contactor 130 is plural, the contactors 130 correspond to the plurality of heating wires one-to-one, a first end of each contactor 130 is connected to a first connection terminal of the water level switch 120, and a second end of each contactor 130 is connected to the controller 140.
When the controller 140 determines that the height of the water level detected by the water level sensor 110 satisfies the heating condition, the target contactor 130 is determined according to the heating condition, and the second terminal of the target contactor 130 is controlled to be energized.
Referring to the above example, the heater 150 includes a first heating wire having a heating temperature range of 0 to 50 deg.c and a second heating wire having a heating temperature range of 50 to 90 deg.c, and the contactors include a first contactor corresponding to the first heating wire and a second contactor corresponding to the second heating wire. Therefore, when the temperature corresponding to the heating condition is 40 ℃, the controller 140 determines that the water level height detected by the water level sensor 110 meets the water level height in the heating condition, and then determines that the heating temperature is in the heating temperature range corresponding to the first heating wire according to the heating temperature of the heating condition, so that the first contactor corresponding to the first heating wire can be used as the target contactor, and the second end point of the target contactor is controlled to be electrified, that is, the second end point of the first contactor is controlled to be electrified, so that the first heating wire heats the water in the washing machine, and the water in the washing machine is heated by the heater 150 and then is kept at the optimal washing temperature corresponding to the clothes to be washed, thereby improving the cleaning effect of the clothes to be washed.
Fig. 4 is a schematic structural diagram of another heating control circuit 100 applied to a washing machine based on the embodiment shown in fig. 1. As shown in fig. 4, the heating control circuit further includes a strong electric switch 410.
The strong electric switch 410 includes a control terminal and a contact switch. The control terminal is connected to the controller 140. One end of the contact switch is connected to a power source, and the other end of the contact switch is connected to a second terminal of the contactor 130.
In an embodiment of the present application, the high current switch 410 includes, but is not limited to, a relay or thyristor. In addition, the contact switch of the strong electric switch 410 is turned on and off under the control of the 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 strong electric switch 410 controls the conduction of the two terminals of the contact switch to electrify the second terminal.
It should be noted that, the higher the heating temperature of the heater 150 is, the higher the corresponding power is; and the heater 150 with higher power will generate a large amount 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 150 flows, resulting in a reduction 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 satisfies the heating condition, the controller 140 may control the strong electric switch 410 through the connection with the control terminal of the strong electric switch 410, so as to conduct the two terminals of the contact switch of the strong electric switch 410, so as to energize the second terminal through the strong electric switch 410, thereby controlling the heater 150 to start heating when the first terminal of the contactor 130 is energized, and further achieving the purpose that the operating current of the heater 150 does not pass through the controller 140, and the controller 140 can also control the on/off of the heater 150, so that the controller 140 is not easily affected by the operating current of the heater 150 to reduce the service life.
Fig. 5 is a schematic structural diagram of another heating control circuit applied to a washing machine based on 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 predetermined height, or when the water level in the washing machine falls to the second predetermined height, the common terminal of the water level switch 120 is connected to the second connection terminal, that is, the common terminal of the water level switch 120 is conducted to the second connection terminal.
When the controller 140 detects that the common terminal is connected to the second connection terminal, the second terminal of the contactor 130 is controlled to be powered off.
It should be noted that, when the water level sensor 110 is out of order and causes a detection abnormality, the controller 140 controls the second end of the contactor 130 to be always energized, so that the water level detected by the water level sensor 110 always satisfies the heating condition.
Therefore, in the embodiment of the present application, the controller 140 may determine whether the common terminal and the second detection terminal are conducted through the connection with the second connection terminal to control the second terminal of the contactor 130 to be de-energized when the water level in the washing machine is low. That is, when the water level in the washing machine satisfies the second predetermined height, the common terminal of the water level switch 120 is connected to the second connection terminal, and the controller 140 controls the second terminal of the contactor 130 to be powered off when detecting that the common terminal is connected to the second connection terminal, so as to prevent the controller 140 from continuously controlling the second terminal of the contactor 130 to be powered on.
Fig. 6 is a schematic structural diagram of another heating control circuit applied to the washing machine based on the embodiment shown in fig. 5.
As shown in fig. 6, the heating control circuit further includes a temperature sensor 610. The temperature sensor 610 is used to collect water temperature information in the washing machine. Wherein the water temperature information represents a temperature value of water within the washing machine.
In the embodiment of the present application, the temperature sensor 610 may adopt a high-precision temperature sensor with a measurement precision of 0.1 ℃, and includes: temperature sensors such as thermocouples, thermistors, platinum Resistors (RTDs), and temperature ICs. Such as: the thermistor temperature sensor is made of semiconductor materials, mostly has a negative temperature coefficient, namely, the resistance value is reduced along with the increase of temperature, and the change of the temperature can cause large resistance value change, so that the thermistor temperature sensor is a very sensitive temperature sensor.
The temperature sensor 610 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 610 satisfies the preset temperature, the second terminal of the contactor 130 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 endpoint and the second endpoint of the contactor 130 are simultaneously powered on and switched on, the heater 150 is started to start heating, and as the heater 150 is continuously heated, the water temperature in the washing machine is continuously increased, so that when the controller 140 detects that the water temperature information in the washing machine collected by the temperature sensor 610 meets the preset temperature, it indicates that the temperature of the water in the washing machine reaches the preset heating temperature when the clothes to be washed are washed in the heating program, and controls the second endpoint of the contactor 130 to be powered off, so as to control the heater 150 to be powered off and stop heating, thereby ensuring that the water temperature in the washing machine is not easily too high to cause damage to the clothes to be washed.
Fig. 7 is a schematic structural diagram of another heating control circuit 100 applied to a washing machine, which is based on the embodiment shown in fig. 6. As shown in fig. 7, the heating control circuit further includes a first detection module 710.
The input end of the first detection module 710 is connected to the temperature sensor 610, and the output end of the first detection module 710 is connected to the controller 140.
In an embodiment of the present application, the first detection module 710 may acquire the water temperature information collected by the temperature sensor 610, determine whether the water temperature information satisfies a preset temperature, and if the first detection module 710 determines that the water temperature information in the washing machine satisfies the preset temperature, send a signal indicating that the water temperature information in the washing machine satisfies the preset temperature to the controller 140 through a connection with the controller 140, so that the controller 140 controls the second endpoint of the contactor 130 to be powered off in response to the signal.
The first detection module 710 determines whether the water temperature information in the washing machine meets a preset temperature according to the water temperature information collected by the temperature sensor 610, and the mode can be flexibly set as required. In one example, a delay confirmation time may be set, so that when the first detection module 710 determines that the water temperature information in the washing machine detected by the temperature sensor 610 meets the preset temperature, and if the time reaches the delay confirmation time, the first detection module 710 sends a signal for indicating that the water temperature information in the washing machine meets the preset temperature to the controller 140, so as to avoid that the controller 140 controls the second endpoint to be powered off due to a transient fluctuation of the water temperature information in the washing machine detected by the temperature sensor 610, so that the heater 150 stops heating when the water temperature in the washing machine does not meet the preset temperature.
In another example, the number of times of satisfaction may be set to count when the first detection module 710 determines that the water temperature information in the washing machine detected by the temperature sensor 610 satisfies the preset temperature, and after the count reaches the number of times of satisfaction, the first detection module 710 sends a signal indicating that the water temperature information in the washing machine satisfies the preset temperature to the controller 140, which is also used to avoid that the controller 140 controls the second endpoint to be powered off when the water temperature information in the washing machine detected by the temperature sensor 610 fluctuates for a short time, so that the heater 150 stops heating when the water temperature in the washing machine does not satisfy the preset temperature.
Through the above embodiment, the water temperature information collected by the temperature sensor 610 is processed by the first detection module 710, so that the controller 140 does not need to process the water temperature information collected by the temperature sensor 610 on the premise of improving the control accuracy of the heating control circuit, and the occupation of computing resources in the controller 140 is reduced.
The power supply applied to the heating control circuit of the washing machine and used for providing electric energy can adopt a three-phase power supply or a single-phase power supply.
The three-phase power supply comprises three live wire ends, a zero wire end and a grounding end. In one example, the controller 140 may be powered by one of the three live wire terminals, and the heater 150 may be powered by the other two live wire terminals; the controller 140 and the heater 150 share a neutral terminal of the three-phase power supply; thereby distinguishing the operating currents of the controller 140 and the heater 150.
The single-phase power supply comprises a live wire end, a zero wire end and a grounding end. In one example, one live wire end can be divided into three sub live wire ends by the wire dividing device, so that the controller 140 can be powered by one of the three sub live wire ends, and the heater 150 can be powered by the other two sub live wire ends; the controller 140 and the heater 150 share the neutral terminal of the single-phase power supply; to distinguish the operating currents of the controller 140 and the heater 150.
Fig. 8 is a schematic structural diagram of another heating control circuit applied to the washing machine based on the embodiment shown in fig. 7. As shown in fig. 8, the heating control circuit further includes a second detection module 810.
An input end of the second sensing module 810 is connected to the water level sensor 110, and an output end of the second sensing module 810 is connected to the controller 140.
In the embodiment of the present application, the water level height in the washing machine collected by the water level sensor 110 may be obtained by the second detection module 810, and whether the water level height in the washing machine meets the heating condition is determined according to the water level height, if the second detection module 810 determines that the water level height in the washing machine meets the heating condition, a signal for indicating that the water level height in the washing machine meets the heating condition is sent to the controller 140 through the connection with the controller 140, so that the controller 140 controls the second endpoint of the contactor 130 to be powered off in response to the signal, and thus the controller 140 does not need to process the data collected by the water level sensor 110, so as to reduce the occupation of the operation resource of the controller 140.
The second detection module 810 determines whether the water level height in the washing machine meets the heating condition according to the water level height in the washing machine collected by the water level sensor 110, that is, the setting mode of the first detection module 710 may be referred to, that is, the delay confirmation time is set, so that when the second detection module 810 determines that the water level height in the washing machine detected by the water level sensor 110 meets the heating condition, if the timing time reaches the delay confirmation time, the second detection module 810 still determines that the water level height in the washing machine detected by the temperature sensor 610 meets the heating condition, the first detection module 810 sends a signal for representing that the water level height in the washing machine meets the heating condition to the controller 140, so as to avoid that the controller 140 controls the second end point to be powered on when the water level height in the washing machine detected by the water level sensor 110 fluctuates momentarily, so that the heater 150 starts heating when the water level height in the washing machine does not meet the heating condition.
Or by setting the satisfying times, so as to count when the second detecting module 810 determines that the water level height in the washing machine detected by the water level sensor 110 satisfies the heating condition, after the count reaches the satisfying times, the second detecting module 810 sends a signal for indicating that the water level height in the washing machine satisfies the heating condition to the controller 140, so as to avoid that the controller 140 controls the second end point to be powered on when the water level height in the washing machine detected by the water level sensor 110 fluctuates for a short time, so that the heater 150 starts heating when the water level height in the washing machine does not satisfy the heating condition.
In addition, in order to further reduce the occupation of the computing resources of the controller 140, a third detection module may be disposed between the second connection terminal of the water level switch 120 and the controller 140.
The input end of the third detection module is connected to the second connection end of the water level switch 120, and the output end of the third detection module is connected to the controller 140.
In the embodiment of the present application, the third detection module may start timing when the common end of the water level switch 120 is connected to the second connection end, and send a signal for representing that the common end of the water level switch 120 is connected to the second connection end to the controller 140 through the connection with the controller 140 if the timing time reaches a preset delay confirmation time, so that the controller 140 controls the second end of the contactor 130 to be powered off in response to the signal, and thus the controller 140 does not need to process the data collected by the water level sensor 110, and further, the occupation of the operation resources of the controller 140 is reduced.
The embodiment of the application also provides a washing machine, which comprises the heating control circuit.
When the water in the washing machine needs to be heated in the process of washing the clothes to be washed, and the controller in the heating control circuit determines that the water level height detected by the water level sensor meets the water level height of the heating condition, the second end point of the contactor is controlled to be electrified. Meanwhile, if the water level in the washing machine meets a first preset condition, the common end of the water level switch is conducted with the first connection end, so that the first end point of the contactor connected with the first connection end is electrified. When the first end point and the second end point of the contactor are simultaneously electrified and conducted, the heater starts heating. Through the dual control of water level switch and controller to avoid because of water level sensor detects the trouble, lead to starting the heater when the water level height in the washing machine is lower, cause the problem that the heater burns futilely.
In addition, when the water level sensor with higher precision is used for collecting the water level height in the washing machine, the water level switch is used for assisting in judging the water level height in the washing machine, so that the collected water level height accuracy in the washing machine is improved, the phenomenon that the heating time of the heater is prolonged and the phenomenon that the heater is burnt dry due to too low water level height is avoided, and potential safety hazards are generated.
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 be separate and not assembled into the washing machine. The computer-readable storage medium carries one or more programs, which, when executed by one of the electronic devices, cause the electronic device to implement the control program executed by the controller in the above-described embodiments.
It should be noted that although in the above detailed description several modules or units of the heating control circuit are mentioned, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Other embodiments of the present 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 invention 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 invention pertains.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A heating control circuit applied to a washing machine, the heating control circuit comprising:
a water level sensor;
the water level switch comprises a public end and a first connecting end, the public end is connected with a power supply, and when the height of the water level in the washing machine meets a first preset height, the public end is conducted with the first connecting end;
the contactor comprises a first end point and a second end point, the first end point is connected with a first connecting end of the water level switch, and the contactor is conducted when the first end point and the second end point are electrified simultaneously;
the controller is connected with the water level sensor and the second end point of the contactor;
the heater is connected with the contactor and starts heating when the contactor is conducted;
and when the controller determines that the water level height in the washing machine detected by the water level sensor meets the heating condition, controlling the second end point of the contactor to be electrified.
2. The heating control circuit according to claim 1, wherein:
the heater includes a plurality of heating wires;
the contactor comprises a plurality of second end points, and the second end points correspond to the heating wires one by one;
and when the controller determines that the water level height detected by the water level sensor meets the heating condition, determining a target second endpoint according to the heating condition, and controlling the target second endpoint to be electrified.
3. The heating control circuit of claim 1, wherein:
the heater includes a plurality of heating wires;
the number of the contactors is multiple, the contactors correspond to the heating wires one by one, a first end point of each contactor is connected with a first connecting end of the water level switch, and a second end point of each contactor is connected with the controller;
and when the controller determines that the water level height detected by the water level sensor meets the heating condition, determining a target contactor according to the heating condition, and controlling the second end point of the target contactor to be electrified.
4. A heating control circuit according to any one of claims 1-3, further comprising:
the strong current switch comprises a control end and a contact switch, the control end is connected with the controller, one end of the contact switch is connected with the power supply, and the other end of the contact switch is connected with the second endpoint of the contactor;
and when the controller determines that the water level sensor detects that the water level height in the washing machine meets the heating condition, the controller controls the conduction of two ends of the contact switch through the control end of the strong electric switch so as to electrify the second end point.
5. The heating control circuit according to any one of claims 1 to 3, wherein the water level switch further comprises a second connection terminal, the second connection terminal is connected to the controller, and when the water level in the washing machine satisfies a second preset height, the common terminal is conducted to the second connection terminal; wherein the second preset height is smaller than the first preset height;
and when the controller detects that the public end is connected with the second connecting end, the second end point of the contactor is controlled to be powered off.
6. A heating control circuit according to any one of claims 1-3, further comprising:
the temperature sensor is connected with the controller;
and when the controller detects that the water temperature information in the washing machine collected by the temperature sensor meets a preset temperature, controlling the second endpoint of the contactor to be powered off.
7. The heating control circuit of claim 6, further comprising:
the input end of the first detection module is connected with the temperature sensor, and the output end of the first detection module is connected with the controller.
8. The heating control circuit of claim 1, wherein the power source comprises a three-phase power source or a single-phase power source.
9. The heating control circuit of claim 1, further comprising:
and the input end of the second detection module is connected with the water level sensor, and the output end of the second detection module is connected with the controller.
10. A washing machine, characterized in that it comprises a heating control circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211204992.0A CN115404656A (en) | 2022-09-30 | 2022-09-30 | Heating control circuit applied to washing machine and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211204992.0A CN115404656A (en) | 2022-09-30 | 2022-09-30 | Heating control circuit applied to washing machine and washing machine |
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| CN115404656A true CN115404656A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211204992.0A Pending CN115404656A (en) | 2022-09-30 | 2022-09-30 | Heating control circuit applied to washing machine and washing machine |
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| CN114000317A (en) * | 2021-11-16 | 2022-02-01 | Tcl家用电器（合肥）有限公司 | Control method of washing equipment and washing equipment |
| WO2022041612A1 (en) * | 2020-08-27 | 2022-03-03 | 无锡小天鹅电器有限公司 | Heating control method and apparatus, laundry treatment device, and storage medium |
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| CN102251379A (en) * | 2011-03-21 | 2011-11-23 | 海尔集团公司 | Water-level measuring device for small/mini buoyancy washing machines and application method thereof |
| CN104342876A (en) * | 2013-08-08 | 2015-02-11 | 海尔集团公司 | Washing machine capable of detecting cylinder collision by using water level sensor and detection method |
| CN105442251A (en) * | 2015-12-10 | 2016-03-30 | 惠而浦（中国）股份有限公司 | Washing machine water heater control system capable of avoiding potential safety hazards |
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