CN113445257B - Detection circuit and clothes treatment equipment - Google Patents
Detection circuit and clothes treatment equipment Download PDFInfo
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- CN113445257B CN113445257B CN202110797596.2A CN202110797596A CN113445257B CN 113445257 B CN113445257 B CN 113445257B CN 202110797596 A CN202110797596 A CN 202110797596A CN 113445257 B CN113445257 B CN 113445257B
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- 238000001514 detection method Methods 0.000 title claims abstract description 179
- 239000000523 sample Substances 0.000 claims abstract description 113
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 239000003990 capacitor Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 description 13
- 230000035945 sensitivity Effects 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 6
- 239000003599 detergent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- -1 laundry softener Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
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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
-
- 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
- D06F2103/14—Supply, recirculation or draining of washing liquid
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
-
- 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
- D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/58—Indications or alarms to the control system or to the user
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
A detection circuit and a clothes treatment device detect the position of a liquid tank and the liquid level in the liquid tank by a first probe and a second probe which are accommodated in the liquid tank. The detection circuit comprises a first connection module, a first detection module, a second connection module and a second detection module. When the first connecting module is not contacted with the first probe and the second connecting module is not contacted with the second probe, the first detecting module and the second detecting module output a second level to prompt the liquid tank to be separated. When the first connecting module is in contact with the first probe and the second connecting module is in contact with the second probe, and the liquid level in the liquid tank does not cover the second probe, the first level output by the first detecting module and the second level output by the second detecting module prompt the liquid tank to be in place. When the first connecting module is in contact with the first probe and the second connecting module is in contact with the second probe, and the liquid level in the liquid tank covers the second probe, the second detecting module outputs a first level to prompt that the liquid in the liquid tank is full.
Description
Technical Field
The present invention relates to a detection circuit, and more particularly, to a detection circuit applied to a laundry treatment apparatus.
Background
In laundry treatment apparatuses such as washing machines, dryers, etc., a liquid tank is used to collect and store condensate or detergent. In the prior art, most of liquid tanks are of drawer type structures, single liquid level detection or single in-place detection is carried out through a floating ball sensor, one floating ball sensor can only carry out one detection, the detection function is single, the matched liquid tank structure is also more complex, the safety is lower, and the user experience is poor.
Disclosure of Invention
The invention mainly aims to provide a detection circuit and clothes treatment equipment, and aims to solve the problems that a floating ball sensor in the prior art is poor in detection effect and single in detection effect.
A detection circuit is applied to a clothes treatment device; the clothes treatment equipment comprises a liquid tank and the detection assembly accommodated in the liquid tank; the detection assembly comprises a first probe and a second probe; the detection circuit includes:
the first connection module can be electrically connected with the first probe;
the first detection module is electrically connected with the first connection module and is used for outputting a first level or a second level;
the second connection module can establish electrical connection with the second probe;
the second detection module is electrically connected with the second connection module and is used for outputting the first level or the second level;
wherein, when the first probe and the first connection module are electrically connected, the second probe and the second connection module are electrically connected, and the liquid level in the liquid tank does not cover the second probe, the first detection module outputs the first level, and the second detection module outputs the second level; when the first probe is electrically connected with the first connection module, the second probe is electrically connected with the second connection module, and the liquid level in the liquid tank covers the second probe, the first detection module and the second detection module both output the first level.
A laundry treatment apparatus comprising a detection circuit; the clothes treatment equipment comprises a liquid tank and the detection assembly accommodated in the liquid tank; the detection assembly comprises a first probe and a second probe; the detection circuit includes:
the control module is used for generating different control signals according to the position of the liquid tank in the clothes treatment equipment and the liquid level height in the liquid tank so as to control the clothes treatment equipment to output different prompt messages;
the first connection module can be electrically connected with the first probe;
the first detection module is electrically connected with the first connection module and is used for outputting a first level or a second level;
the second connection module can establish electrical connection with the second probe;
the second detection module is electrically connected with the second connection module and is used for outputting the first level or the second level;
wherein, when the first probe and the first connection module are electrically connected, the second probe and the second connection module are electrically connected, and the liquid level in the liquid tank does not cover the second probe, the first detection module outputs the first level, and the second detection module outputs the second level; when the first probe is electrically connected with the first connection module, the second probe is electrically connected with the second connection module, and the liquid level in the liquid tank covers the second probe, the first detection module and the second detection module both output the first level.
According to the detection circuit and the clothes treatment equipment, the position of the liquid tank in the clothes treatment equipment is detected through the first probe, the liquid level in the liquid tank is identified through the second probe, and the in-place condition of the liquid tank and the liquid level in the liquid tank are prompted according to the detection result, so that user experience in the use process of the clothes treatment equipment is optimized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a perspective view of a laundry treating apparatus of the present invention.
Fig. 2 is a schematic cross-sectional view of the tank of the first embodiment of fig. 1.
Fig. 3 is a schematic cross-sectional view of the tank of the second embodiment of fig. 1.
Fig. 4 is a schematic cross-sectional view of the tank of the third embodiment of fig. 1.
Fig. 5 is a schematic block diagram of the detection circuit shown in fig. 1.
Fig. 6 is a circuit schematic diagram of the detection circuit shown in fig. 5.
Description of the main reference signs
Laundry treating apparatus 200
Liquid tank 100
Housing 201
First box 10
Second box 20
Detection assembly 30
First probe 31
Second probe 32
Detection chip 33
Third probe 34
Detection circuit 300
First connection module 301
Second connection module 302
First detection module 303
Second detection module 304
Switch module 305
Control module 306
First connector J1
Second connector J2
First detection chip U1
Second detection chip U2
First regulating capacitor C1
Second regulating capacitor C2
First voltage dividing resistor R1
Second voltage-dividing resistor R2
Third voltage dividing resistor R3
Third regulating capacitor C3
Fourth regulating capacitor C4
Fourth voltage dividing resistor R4
Fifth voltage dividing resistor R5
First node N1
Voltage source V2
Transistor Q1
First resistor R6
Second resistor R7
Third resistor R8
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The terms "first," "second," and "third" in the description of the invention and in the above figures, etc. are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
The following describes specific embodiments of the present invention with reference to the drawings.
Referring to fig. 1, a schematic diagram of a laundry treating apparatus 200 is shown. The laundry treating apparatus 200 may include a housing 201 and a liquid tank 100 movably accommodated in the housing 201. When the liquid tank 100 is completely accommodated in the housing 201, the liquid tank 100 is in a seated state. In the seated state, the liquid tank 100 is fixed with respect to the laundry treating apparatus 200 to accommodate liquid generated from a condenser (not shown). The liquid tank 100 is in a disengaged state when the liquid tank 100 is pulled out relative to the housing 201. In the detached state, the liquid tank 100 may move with respect to the laundry treating apparatus 200 to pour out the liquid in the liquid tank 100 or to add liquid such as laundry detergent, laundry softener, and detergent into the liquid tank 100, but not limited thereto.
Please refer to fig. 2, which is a schematic cross-sectional view of the liquid tank 100 according to the first embodiment. The liquid tank 100 includes a first cartridge 10, a second cartridge 20, and a detection assembly 30. The second box 20 is detachably disposed in the first box 10, and the detection assembly 30 is disposed between the first box 10 and the second box 20.
Referring to fig. 2, the detecting assembly 30 is configured to detect a position of the liquid tank 100 in the laundry treating apparatus 200 and a liquid level in the liquid tank 100 and output a corresponding control signal. In the first embodiment, the detection assembly 30 includes a first probe 31, a second probe 32, and a detection chip 33. The first probe 31 and the second probe 32 extend along a first direction X and are disposed parallel to each other. In a second direction Y perpendicular to the first direction X, the first probe 31 is disposed near the bottom surfaces of the first and second cases 10 and 20, and the second probe 32 is disposed away from the bottom surfaces of the first and second cases 10 and 20. That is, the first probe 31 and the second probe 32 are provided at different heights. The detection chip 33 may be electrically connected to the first probe 31 and the second probe 32.
Please refer to fig. 3, which is a schematic cross-sectional view of the liquid tank 100 according to the second embodiment. The positions of the first probe 31 and the second probe 32 in the second embodiment are different from the positions of the first probe 31 and the second probe 32 in the first embodiment. That is, the description of the liquid tank 100 described in the first embodiment is basically applicable to the liquid tank 100 of the second embodiment. In the second embodiment, the first probe 31 and the second probe 32 may extend in the second direction Y and are disposed parallel to each other. In the first direction X, the first probe 31 and the second probe 32 are arranged coplanar. That is, the first probe 31 and the second probe 32 are disposed at equal distances from the bottom surface of the second case 20.
Please refer to fig. 4, which is a schematic cross-sectional view of the liquid tank 100 according to the third embodiment. The detection assembly 30 of the third embodiment further includes a third probe 34, otherwise substantially identical to the detection assembly 30 of the first embodiment. That is, the description of the liquid tank 100 described in the first embodiment is basically applicable to the liquid tank 100 of the third embodiment. In the third embodiment, the third probe 34 extends in the first direction X and is parallel to the first probe 31 and the second probe 32. In the second direction Y, the third probe 34 is disposed between the first probe 31 and the second probe 32. The third probe 34 may be electrically connected to the detection chip 33, and the detection chip 33 detects different liquid levels in the liquid tank 100 through the second probe 32 and the third probe 34.
The detection chip 33 has a detection circuit 300 (shown in fig. 5) therein.
The detection circuit 300 is configured to detect a position of the liquid tank 100 in the laundry treating apparatus 200 by the first probe 31 and detect a liquid level in the liquid tank 100 by the second probe 32, and control the laundry treating apparatus 200 to output different prompt messages according to a detection result.
As shown in fig. 5, the detection circuit 300 includes a first connection module 301, a second connection module 302, a first detection module 303, a second detection module 304, a switch module 305, and a control module 306. In other embodiments, the detection circuit 300 may further include a third connection module (not shown) electrically connected to the third probe 34 (shown in fig. 4) and a third detection module (not shown).
Referring to fig. 6, the first connection module 301 is electrically connected to the first detection module 303, and can be electrically connected to the first probe 31 to generate a first trigger signal. In at least one embodiment of the present invention, the first connection module 301 includes a first connector J1. Wherein, when the liquid tank 100 is in the disengaged state, the first connector J1 is electrically disconnected from the first probe 31. When the liquid tank 100 is in the seated state, an electrical connection is established between the first connector J1 and the first probe 31.
Referring to fig. 6, the second connection module 302 is electrically connected to the second detection module 304, and can be electrically connected to the second probe 32 to generate a second trigger signal. In at least one embodiment of the present invention, the second connection module 302 includes a second connector J2. Wherein when the liquid tank 100 is in the in-place state and the liquid surface in the liquid tank 100 does not cover the second probe 32, an electrical connection is established between the second connector J2 and the second probe 32, and the second connector J2 does not generate the second trigger signal. When the liquid tank 100 is in the seated state and the liquid level within the liquid tank 100 covers the second probe 32, an electrical connection is established between the second connector J2 and the second probe 32, and the second connector J2 generates the second trigger signal.
Referring to fig. 6, the first detection module 303 is electrically connected to the sensing pin of the control module 306 through a first node N1, and is electrically connected to the first connection module 301. The first detection module 303 is configured to output a first level to the switching module 305 when the first trigger signal is received, and output a second level to the switching module 305 when the first trigger signal is not received. In an embodiment of the present invention, the first level is a low level, i.e., 0 volts (V), and the second level is a high level. The first detection module 303 includes a first detection chip U1, a first adjustment capacitor C1, a second adjustment capacitor C2, a first voltage dividing resistor R1, a second voltage dividing resistor R2, and a third voltage dividing resistor R3. The first pin of the first detection chip U1 is electrically connected to the ground terminal through the first adjusting capacitor C1, the second pin of the first detection chip U1 is electrically connected to the ground terminal through the second adjusting capacitor C2, the third pin of the first detection chip U1 is electrically connected to the first connector J1 through the first voltage dividing resistor R1, and the output pin of the first detection chip U1 is electrically connected to the switch module 305 through the second voltage dividing resistor R2. One end of the third voltage dividing resistor R3 is electrically connected with the output pin of the first detection chip U1, and the other end of the third voltage dividing resistor R3 receives the first power supply voltage. The first adjusting capacitor C1 and the second adjusting capacitor C2 are used for adjusting the sensing sensitivity of the first detecting chip U1. When the capacitance values of the first adjusting capacitor C1 and the second adjusting capacitor C2 are larger, the sensing sensitivity of the first detecting chip U1 is lower, that is, the voltage change of the third pin of the first detecting chip U1 needs to be larger, and the third pin of the first detecting chip U1 can only recognize the first trigger signal. In an embodiment of the present invention, the capacitance value of the first adjustment capacitance C1 is larger than the capacitance value of the second adjustment capacitance C2. The first adjusting capacitor C1 is used for mainly coarsely adjusting the sensitivity of the third pin of the first detecting chip U1, and the second adjusting capacitor C2 is used for finely adjusting the sensitivity of the third pin of the first detecting chip U1. In this embodiment, the first power supply voltage is 3.3V. In at least one embodiment of the present invention, the first tuning capacitor C1 has a capacitance value of 5 picofarads (pF) and the second tuning capacitor C2 has a capacitance value of 0.5 picofarads (pF).
Referring to fig. 6, the second detecting module 304 is electrically connected to the sensing pin of the control module 306 through the first node N1, and is electrically connected to the second connecting module 302. The second detection module 304 is configured to output the first level to the switching module 305 when the second trigger signal is received, and output the second level to the switching module 305 when the second trigger signal is not received. In an embodiment of the present invention, the first level is low, i.e., 0V, and the second level is high. The second detection module 304 includes a second detection chip U2, a third adjustment capacitor C3, a fourth adjustment capacitor C4, a fourth voltage dividing resistor R4, and a fifth voltage dividing resistor R5. The first pin of the second detection chip U2 is electrically connected to the ground through the third adjusting capacitor C3, the second pin of the second detection chip U2 is electrically connected to the ground through the fourth adjusting capacitor C4, the third pin of the second detection chip U2 is electrically connected to the second connector J2 through the fourth voltage dividing resistor R4, and the output pin of the second detection chip U2 is electrically connected to the sensing pin of the control module 306 through the first node N1. One end of the fifth voltage dividing resistor R5 is electrically connected with the output pin of the second detection chip U2, and the other end of the fifth voltage dividing resistor R5 receives the first power supply voltage. The third adjusting capacitor C3 and the fourth adjusting capacitor C4 are used for adjusting the sensing sensitivity of the third pin of the second detecting chip U2. The third adjusting capacitor C3 is configured to perform main coarse adjustment on the sensitivity of the third pin of the second detection chip U2, and the fourth adjusting capacitor C4 is configured to perform fine adjustment on the sensitivity of the third pin of the second detection chip U2. When the capacitance values of the third adjusting capacitor C3 and the fourth adjusting capacitor C4 are larger, the sensing sensitivity of the second detecting chip U2 is lower, that is, the voltage change of the third pin of the second detecting chip U2 needs to be larger, and the third pin of the second detecting chip U2 can only recognize the second trigger signal. In an embodiment of the present invention, the capacitance value of the third adjustment capacitor C3 is greater than the capacitance value of the fourth adjustment capacitor C4, and the capacitance value of the third adjustment capacitor C3 is equal to the capacitance value of the first adjustment capacitor C1, and the capacitance value of the fourth adjustment capacitor C4 is greater than the capacitance value of the second adjustment capacitor C2. In other embodiments, the capacitance value of the third adjustment capacitance C3 may also be greater than the capacitance value of the first adjustment capacitance C1. In at least one embodiment of the present invention, the capacitance value of the third regulating capacitor C3 is 5pF, and the capacitance value of the fourth regulating capacitor C4 is 2.5 picofarads (pF).
In the embodiment of the present invention, in the case where the capacitance value of the third adjustment capacitance C3 is equal to the capacitance value of the first adjustment capacitance C1, since the capacitance value of the fourth adjustment capacitance C4 is larger than the capacitance value of the second adjustment capacitance C2, the sensing sensitivity of the third pin of the second detection chip U2 is smaller than the sensing sensitivity of the third pin of the first detection chip U1, so that the first detection chip U1 outputs the first level and the second detection chip U2 keeps outputting the second level when the first probe 31 and the second probe 32 are simultaneously contacted with the corresponding first connector J1 and the second connector J2.
Referring to fig. 6, the switch module 305 is electrically connected to the sensing pin of the control module 306 through the first node N1, and is electrically connected to the first detection module 303 and the second detection module 304. The switch module 305 is configured to adjust the voltage of the sensing pin of the control module 306 according to the level states of the output pins of the first detection module 303 and the second detection module 304. That is, the switch module 305 is configured to adjust the voltage of the first node N1 according to the level states of the output pins of the first detection module 303 and the second detection module 304. The switching module 305 biases the voltage of the first node N1 to a first bias voltage when both the first detection module 303 and the second detection module 304 output the second level. When the first detection module 303 outputs the first level and the second detection module 304 outputs the second level, the switching module 305 biases the voltage of the first node N1 at a second bias voltage. The switching module 305 biases the voltage of the first node N1 at a third bias voltage when both the first detection module 303 and the second detection module 304 output the first level. Wherein the first bias voltage is less than the second bias voltage and greater than the third bias voltage. In this embodiment, the first bias voltage is 1.65V, the second bias voltage is 2.2V, and the third bias voltage is 0V. The switching module 305 includes a voltage source V2, a transistor Q1, a first resistor R6, a second resistor R7, and a third resistor R8. The first resistor R6 and the second resistor R7 are connected in series between the voltage source V2 and the ground, the first node N1 is electrically connected between the first resistor R6 and the second resistor R7, one end of the third resistor R8 is electrically connected between the first resistor R6 and the second resistor R7 and is electrically connected with the first node N1, and the other end of the third resistor R8 is electrically connected with the first connecting end of the transistor Q1. The control end of the transistor Q1 is electrically connected to the output pin of the first detection chip U1 through the second voltage dividing resistor R2, and the second connection end of the transistor Q1 is grounded. In an embodiment of the present invention, the transistor Q1 is a triode. The control end is a base electrode, the first connecting end is a collector electrode, and the second connecting end is an emitter electrode.
Referring to fig. 6, the control module 306 is electrically connected to the switch module 305 and the second detection module 304 through the first node N1. The control module 306 outputs different control signals according to the voltage of the first node N1. When the voltage of the first node N1 is the first bias voltage, the control module 306 outputs a first control signal, the detection chip 33 generates a first prompting message according to the first control signal to prompt the liquid tank 100 to be in the disengaged state, and the detection chip 33 may further control the laundry treatment apparatus 200 to stop working according to the first control signal. When the voltage of the first node N1 is the second bias voltage, the control module 306 outputs a second control signal, and the detection chip 33 generates a second prompting message according to the second control signal, so as to prompt that the liquid tank 100 is in the in-place state and the liquid level in the liquid tank 100 is not full. When the voltage of the first node N1 is the third bias voltage, the control module 306 outputs a third control signal, and the detection chip 33 generates a third prompting message according to the third control signal, so as to prompt that the liquid tank 100 is in the in-place state and the liquid in the liquid tank 100 is full. In this embodiment, the first prompt information, the second prompt information, and the third prompt information may be the prompt information, and may be audio information, indicator light information, image information, or any combination of the three, but is not limited thereto.
The specific operation process of the detection circuit 300 is as follows:
when the liquid tank 100 is partially contained in the housing 201, the first probe 31 is electrically disconnected from the first connector J1, and the second probe 32 is electrically disconnected from the second connector J2. The first trigger signal is not sensed by the first detection chip U1, and the output pin of the first detection chip U1 is at the second level. The second trigger signal is not sensed by the second detection chip U2, and the output pin of the second detection chip U2 is at the second level. When the output pin of the first detection chip U1 is at the second level, the transistor Q1 is turned on, so that the third resistor R8 is connected in parallel with the second resistor R7 and then connected in series with the first resistor R6. At this time, the voltage at the first node N1 is biased at the first bias voltage. The control module 306 generates the first control signal according to the first bias voltage. The detection chip 33 generates the first prompt message according to the first control signal to prompt that the liquid tank 100 is in the disengaged state, and the detection chip 33 may also control the laundry treatment apparatus 200 to stop working according to the first control signal.
When the liquid tank 100 is completely contained in the housing 201, the first probe 31 is electrically connected to the first connector J1, and the second probe 32 is electrically connected to the second connector J2. The third pin of the first detection chip U1 receives the first trigger signal, and then the output pin of the first detection chip U1 is at the first level. At this time, when the liquid surface in the liquid tank 100 does not cover the second probe 32, since the sensing sensitivity of the third pin of the second detection chip U2 is smaller than the sensing sensitivity of the third pin of the first detection chip U1, and the third pin of the second detection chip U2 does not receive the second trigger signal, the output pin of the second detection chip U2 is at the second level. When the output pin of the first detection chip U1 is at the second level, the transistor Q1 is turned off, so that the third resistor R8 is electrically disconnected from the second resistor R7. At this time, only the first resistor R6 and the second resistor R7 are connected in series in the switching module 305 so that the voltage at the first node N1 is biased at the second bias voltage. The control module 306 generates the second control signal according to the second bias voltage. The detection chip 33 generates the second prompting message according to the second control signal to prompt the liquid tank 100 to be in the in-place state.
Further, on the premise that the output pin of the first detection chip U1 is at the first level, that is, the liquid tank 100 is completely contained in the housing 201, when the liquid level in the liquid tank 100 covers the second probe 32, the third pin of the second detection chip U2 receives the second trigger signal, the output pin of the second detection chip U2 is at the first level, and the voltage of the first node N1 is biased at the third bias voltage. The control module 306 generates the third control signal according to the third bias voltage. The detection chip 33 generates the third prompt message according to the third control signal to prompt that the liquid in the liquid tank 100 is full.
The detection circuit 300 detects the position of the liquid tank 100 in the laundry treatment apparatus 200 through the first probe 31 and detects the liquid level in the liquid tank 100 through the second probe 32, and prompts the in-place condition of the liquid tank 100 and the liquid level in the liquid tank 100 according to the detection result, so as to optimize the user experience in the use process of the laundry treatment apparatus 200. Meanwhile, the use of the laundry treating apparatus 200 may be further controlled according to the detection result, thereby improving the reliability of the laundry treating apparatus 200 during operation.
It should also be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A detection circuit is applied to a clothes treatment device; the clothes treatment equipment comprises a liquid tank and a detection assembly accommodated in the liquid tank; the detection assembly comprises a first probe and a second probe; the detection circuit is characterized by comprising:
the first connection module can be electrically connected with the first probe;
the first detection module is electrically connected with the first connection module and is used for outputting a first level or a second level;
the second connection module can establish electrical connection with the second probe;
the second detection module is electrically connected with the second connection module and is used for outputting the first level or the second level;
the detection circuit further comprises a switch module and a control module, wherein the switch module comprises a voltage source, a transistor, a first resistor, a second resistor and a third resistor; the first resistor and the second resistor are connected in series between the voltage source and the ground, a sensing pin of the control module is electrically connected between the first resistor and the second resistor, one end of the third resistor is electrically connected between the first resistor and the second resistor and is electrically connected with the sensing pin of the control module, the sensing pin of the control module is further electrically connected with the second detection module, the other end of the third resistor is electrically connected with the first connecting end of the transistor, the control end of the transistor is electrically connected with the output pin of the first detection module, and the second connecting end of the transistor is grounded;
when the first probe is electrically disconnected from the first connection module and the second probe is electrically disconnected from the second connection module, the first detection module and the second detection module both output the second level so as to enable the transistor to be conducted, the third resistor is connected in parallel with the second resistor and then connected in series with the first resistor, and then the sensing pin of the control module is at a first bias voltage;
when the first probe is electrically connected with the first connection module, the second probe is electrically connected with the second connection module, the first detection module outputs the first level and the second detection module outputs the second level so as to cut off the transistor, the third resistor is electrically disconnected with the second resistor, the first resistor is connected with the second resistor in series, and then the sensing pin of the control module is at a second bias voltage;
when the first probe is electrically connected with the first connection module, the second probe is electrically connected with the second connection module, and the liquid level in the liquid tank covers the second probe, the first detection module and the second detection module both output the first level, so that the sensing pin of the control module is at a third bias voltage.
2. The detection circuit of claim 1, wherein the control module is configured to generate different control signals according to the outputs of the switch module and the second detection module to control the laundry treatment apparatus to output different prompt messages.
3. The detection circuit of claim 2, wherein the control module outputs a first control signal when both the first detection module and the second detection module output the second level; the control module outputs a second control signal when the first detection module outputs the first level and the second detection module outputs the second level; the control module outputs a third control signal when both the first detection module and the second detection module output the first level.
4. The detection circuit of claim 3, wherein the first bias voltage is less than the second bias voltage and greater than the third bias voltage.
5. The detection circuit of claim 2, wherein the first detection module comprises a first detection chip, a first adjustment capacitance, a second adjustment capacitance, a first voltage dividing resistor, a second voltage dividing resistor, and a third voltage dividing resistor; the first pin of the first detection chip is electrically connected with the grounding end through the first adjusting capacitor, the second pin of the first detection chip is electrically connected with the grounding end through the second adjusting capacitor, the third pin of the first detection chip is electrically connected with the first connecting module through the second voltage dividing resistor, and the output pin of the first detection chip is electrically connected with the switch module through the second voltage dividing resistor; one end of the third voltage dividing resistor is electrically connected with the output pin of the first detection chip, and the other end of the third voltage dividing resistor receives the first power supply voltage.
6. The detection circuit of claim 2, wherein the second detection module comprises a second detection chip, a third adjustment capacitance, a fourth voltage dividing resistor, and a fifth voltage dividing resistor; the first pin of the second detection chip is electrically connected with the grounding end through the third adjusting capacitor, the second pin of the second detection chip is electrically connected with the grounding end through the fourth adjusting capacitor, the third pin of the second detection chip is electrically connected with the second connecting module through a fourth voltage dividing resistor, and the output pin of the second detection chip is electrically connected with the sensing pin of the control module; one end of the fifth voltage dividing resistor is electrically connected with the output pin of the second detection chip, and the other end of the fifth voltage dividing resistor receives the first power supply voltage.
7. The detection circuit of claim 1, wherein the liquid tank comprises a first tank and a second tank; the second box body is detachably arranged in the first box body, and the detection assembly is arranged between the first box body and the second box body; the first probe and the first probe are arranged in parallel; the first probe is arranged close to the bottom surfaces of the first box body and the second box body, and the second probe is arranged far away from the bottom surfaces of the first box body and the second box body.
8. The detection circuit of claim 7, wherein the detection assembly further comprises a third probe; the third probe is arranged between the first probe and the second probe; the third probe; the detection circuit detects different liquid levels in the liquid tank through the second probe and the third probe.
9. The detection circuit of claim 1, wherein the liquid tank comprises a first tank and a second tank; the second box body is detachably arranged in the first box body, and the detection assembly is arranged between the first box body and the second box body; the first probes are arranged in parallel with each other and extend along the direction perpendicular to the bottom surfaces of the first box body and the second box body; the first probe and the second probe are arranged at equal distance from the bottom surface of the first box body, and/or the first probe and the second probe are arranged at equal distance from the bottom surface of the second box body.
10. A laundry treatment apparatus comprising a detection circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110797596.2A CN113445257B (en) | 2021-07-14 | 2021-07-14 | Detection circuit and clothes treatment equipment |
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| CN202110797596.2A CN113445257B (en) | 2021-07-14 | 2021-07-14 | Detection circuit and clothes treatment equipment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1659207A1 (en) * | 2004-11-19 | 2006-05-24 | BSH Bosch und Siemens Hausgeräte GmbH | Condensing-type clothes dryer |
| EP1900868A1 (en) * | 2006-09-18 | 2008-03-19 | Electrolux Home Products Corporation N.V. | Condenser laundry dryer with sensed drawer |
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2021
- 2021-07-14 CN CN202110797596.2A patent/CN113445257B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1659207A1 (en) * | 2004-11-19 | 2006-05-24 | BSH Bosch und Siemens Hausgeräte GmbH | Condensing-type clothes dryer |
| EP1900868A1 (en) * | 2006-09-18 | 2008-03-19 | Electrolux Home Products Corporation N.V. | Condenser laundry dryer with sensed drawer |
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