CN110558835A - Capacitive liquid level detection structure and electric kettle thereof - Google Patents
Capacitive liquid level detection structure and electric kettle thereof Download PDFInfo
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- CN110558835A CN110558835A CN201910888186.1A CN201910888186A CN110558835A CN 110558835 A CN110558835 A CN 110558835A CN 201910888186 A CN201910888186 A CN 201910888186A CN 110558835 A CN110558835 A CN 110558835A
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- 239000007788 liquid Substances 0.000 title claims abstract description 192
- 238000001514 detection method Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 230000006698 induction Effects 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 18
- 238000009835 boiling Methods 0.000 claims description 15
- 230000035945 sensitivity Effects 0.000 claims description 11
- 230000006855 networking Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 5
- 238000010411 cooking Methods 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 239000011550 stock solution Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 3
- 239000003651 drinking water Substances 0.000 abstract description 2
- 235000020188 drinking water Nutrition 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
- A47J27/2105—Water-boiling vessels, e.g. kettles electrically heated of the cordless type, i.e. whereby the water vessel can be plugged into an electrically-powered base element
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21166—Constructional details or accessories
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Cookers (AREA)
Abstract
The invention relates to a capacitance type liquid level detection structure and an electric kettle thereof, wherein the capacitance type liquid level detection structure comprises a liquid storage container, and a water level scale is arranged on the liquid storage container; the method is characterized in that: the liquid storage container is provided with an induction electrode plate which is not in contact with liquid, the induction electrode plate is positioned at different height positions to form a water level scale, a distance L is formed between the induction electrode plate and the inner wall of the liquid storage container, and the distance L is suitable for the induction electrode plate to generate a capacitance value when the liquid reaches the corresponding height position; the capacitance type liquid level detection structure further comprises a chip module, wherein an operation chip is arranged on the chip module, and the operation chip is connected with more than one induction electrode slice. The structure has the characteristics of reliable liquid level detection performance, guarantee of healthy drinking water for users, convenience in cleaning, good safety and the like.
Description
Technical Field
The invention relates to an electric kettle, in particular to a capacitance type liquid level detection structure and an electric kettle thereof.
Background
In the existing electric heating kettles in the market, liquid level detection is generally realized by a resistance type liquid level gauge, a flow monitoring liquid level gauge, an ultrasonic liquid level gauge and the like. The resistance-type liquid level device needs to be arranged in the inner cavity of the liquid storage container, and the liquid level detection devices can release a large amount of harmful substances such as heavy metals and the like when working in boiling water for a long time, so that the resistance-type liquid level device is harmful to a human body after being used for a long time; under the condition of improper manual operation of the flow monitoring liquid level device, safety accidents of different degrees are easy to occur, and greater potential safety hazards exist; the ultrasonic liquid level device is expensive and is not acceptable to users. In addition, if the liquid storage container is used for heating tap water for a long time, the surface of the liquid level detection device is easy to scale, so that the liquid level detection device is easy to lose efficacy; the liquid level detection device is arranged in the inner cavity of the liquid storage container, so that the inner cavity of the liquid storage container forms a plurality of hidden positions, and a user is difficult to clean; meanwhile, the thermistor is placed in water, scales can be formed for a long time, the precision of the thermistor is influenced, and meanwhile, the water quality is polluted.
chinese patent document CN106289449A discloses a capacitance type water level and water amount detection device, a water boiling kettle and a detection method, and specifically discloses: the electric connector comprises a liquid storage container and a base which are electrically connected with each other through a coupler, wherein a conductive part is arranged in the liquid storage container, a conductive cylinder body with the surface covered with an insulating material is arranged on the inner bottom surface of the liquid storage container, the conductive part and the conductive cylinder body with the surface covered with the insulating material jointly form a capacitor structure, a control circuit is arranged on the base, and the conductive cylinder body is electrically connected with the control circuit through the coupler. In the structure, the conductive column is arranged in the kettle, so that the cleaning is very inconvenient; in addition, the insulating material may release some substances harmful to human bodies when working in a high-temperature environment for a long time, and the substances may cause harm to the human bodies.
chinese patent document CN207456560U discloses a capacitive water level sensor and a liquid level detection device, and specifically discloses: the detection device comprises two electrode plates and a detection circuit, wherein the electrode plates are electrically connected with the detection circuit, the two electrode plates and the detection circuit are integrated on a circuit board, and the two electrode plates are arranged on the same surface of the circuit board. In this structure, two induction electrode pieces need be used to a water level monitoring point, but also need use the singlechip, the cost is improved greatly.
Therefore, further improvements to existing electric kettles are needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the capacitance type liquid level detection structure and the electric kettle thereof, which have the advantages of simple design, reasonable structure, reliable liquid level detection performance, guarantee of healthy drinking of users, convenience in cleaning and good safety.
The purpose of the invention is realized as follows:
A capacitance type liquid level detection structure comprises a liquid storage container, wherein a water level scale is arranged on the liquid storage container; the method is characterized in that: more than one induction electrode slice which is not in contact with liquid in the inner cavity of the liquid storage container is arranged on the liquid storage container, the more than one induction electrode slices are positioned at different height positions to form the water level scale, a distance L is formed between the induction electrode slices and the inner wall of the liquid storage container, and the distance L is suitable for the induction electrode slices to generate capacitance values when the liquid reaches the corresponding height positions; the capacitance type liquid level detection structure also comprises a chip module capable of detecting capacitance values generated by the sensing electrode plates, wherein the chip module is provided with an operation chip, and the operation chip is connected with more than one sensing electrode plate; when the capacitance value generated by the induction electrode slice changes, the frequency of an oscillating circuit in the chip changes along with the capacitance value, and the liquid level is judged by the operation chip through an algorithm according to the change of the frequency.
The liquid storage container is made of insulating materials, and the insulating materials comprise glass, ceramics, stone materials and the like; or, the liquid storage container is made of a metal material, in order to avoid the influence of the conductive metal material on liquid level detection, a mounting through hole is formed in the liquid storage container, an insulating part is arranged on the mounting through hole, and the sensing electrode plate is arranged on the insulating part.
the distance L is 0cm-2cm, preferably 0.2cm, 0.5cm, 1cm, 1.5 cm.
the induction electrode plate is embedded in the inner side of the side wall of the liquid storage container; or the induction electrode plate is arranged on the outer side of the side wall of the liquid storage container.
An electric kettle is characterized in that: comprising a main control panel and the capacitive liquid level detection structure as claimed in claim; the main control board is in communication connection and power supply connection with the chip module, and enters a corresponding working mode according to a liquid level signal fed back by the chip module; the liquid storage container is a kettle body used for storing water.
The electric kettle also comprises a thermistor used for calculating the temperature of liquid in the liquid storage container, the thermistor is arranged on the outer wall of the liquid storage container, and the operation chip is connected with the thermistor; and/or a sensitivity adjusting circuit for adjusting the sensitivity of the induction liquid level of the induction electrode plate is arranged on the chip module, and the operation chip is connected with the sensitivity adjusting circuit.
The induction electrode plate comprises an anti-overflow electrode plate, a normal heating electrode plate, a quick boiling electrode plate and an anti-dry heating electrode plate which are respectively connected with the chip module; when the liquid level reaches the position of the anti-overflow electrode plate, the main control board enters a warning mode, the user is prohibited from boiling water, and the user is reminded that the water level is too high; when the liquid level reaches the position of the normal heating electrode slice, the main control board enters a normal working mode; when the liquid level reaches the position of the quick-boiling electrode slice, the main control board enters a quick-boiling mode; when the liquid level reaches the position of the dry burning prevention electrode plate, the main control board enters a warning mode and reminds a user to add water.
The liquid storage container and/or the main control board are/is connected with more than one luminous element matched with the corresponding sensing electrode plates, and when the liquid level reaches the sensing electrode plates, the luminous elements matched with the sensing electrode plates light up; and/or the main control board is connected with a sound generating element, and the sound generating element generates corresponding sound when the liquid level reaches the induction electrode slice; and/or the main control board is connected with a display, and when the liquid level reaches the induction electrode plate, the display displays corresponding information.
The main control board is provided with a communication module, the communication module is communicated and interconnected with the networking terminal, and the liquid level detection information is sent to the networking terminal through the communication module; and/or, a remote control module is arranged on the main control board, the remote control module is communicated and interconnected with the remote controller, and the liquid level detection information is sent to the remote controller through the remote control module.
The electric kettle also comprises a power supply base, the liquid storage container is detachably arranged on the power supply base, and the main control board is arranged on the power supply base; the chip module is arranged on the liquid storage container; the liquid storage container is provided with an upper contact piece, the power supply base is provided with a lower contact piece, and when the liquid storage container is placed on the power supply base, the upper contact piece is electrically connected with the lower contact piece, so that wired communication connection and/or wired power supply connection between the chip module and the main control board are realized;
Or the electric kettle further comprises a power supply base, the liquid storage container is detachably arranged on the power supply base, and the main control board and the chip module are respectively arranged on the power supply base; the liquid storage container is provided with more than one upper contact piece which is in one-to-one correspondence with the induction electrode pieces, and the induction electrode pieces are connected with the corresponding upper contact pieces; the power supply base is provided with more than one lower contact part which corresponds to the upper contact part one by one, and the more than one lower contact parts are connected with the chip module; when the liquid storage container is placed on the power supply base, the upper contact part is electrically connected with the corresponding lower contact part, so that the connection between the sensing electrode plate and the chip module is realized;
Or the electric kettle also comprises a power supply base, the liquid storage container is detachably arranged on the power supply base, and the main control board is arranged on the power supply base; the chip module is arranged on the liquid storage container; the chip module is provided with an information transmitting circuit, the main control board is provided with an information receiving circuit used for communicating and interconnecting with the information transmitting circuit, and wireless communication connection between the chip module and the main control board is realized;
Or, be equipped with electric chamber on the stock solution container, main control board and chip module set up respectively in electric chamber.
The invention has the following beneficial effects:
1. The induction electrode plate which is not contacted with water is arranged on the liquid storage container, and the water level is detected by utilizing the principle of a capacitive proximity switch; specifically, the sensing electrode plate forms one electrode plate of the capacitor, the other electrode plate is liquid, when the liquid reaches the corresponding sensing electrode plate, the dielectric constants of the liquid and the sensing electrode plate change, so that the sensing electrode plate generates a corresponding capacitance value, the capacitance value generated by the sensing electrode plate changes, so that the frequency of an oscillating circuit in the chip module changes, and the water level is judged by monitoring the change of the frequency, so that the purpose of monitoring the water level is realized; the induction electrode plate can achieve the purpose of detecting the liquid level without contacting with the water body, so that the induction electrode plate can not influence the water quality, the sanitation of the water body is ensured, and the water safety of a user is effectively ensured;
2. The induction electrode plate can be arranged on the outer wall of the liquid storage container in a sticking mode or can be arranged on the inner side of the side wall of the liquid storage container in an embedding mode, and compared with a structure that a traditional liquid level detection device is directly arranged in the inner cavity of the container, the structure can ensure that the inner cavity of the liquid storage container is clean and sanitary, ensure the drinking water health of a user and facilitate the user to clean the inner cavity of the container; meanwhile, the working performance of the induction electrode plate can be prevented from being influenced by the formation of scale, the liquid level detection is ensured to be accurate, and the service life of the induction electrode plate is prolonged;
3. The induction electrode plates at different height positions can be endowed with corresponding functions, such as: the anti-overflow electrode plate can prevent the safety problem caused by the overflow of the boiling water when the water level reaches or exceeds the dangerous height, the normal heating electrode plate can ensure that a user can use a normal mode for heating, the quick-boiling electrode plate can efficiently heat the water body according to the set power, the anti-dry-heating electrode plate can prevent the problem of dry heating caused by the electrification when the water level is lower than the lowest water level, and the capacity electrode plate can detect the water body capacity in real time; the induction electrode plates can be arranged correspondingly according to different requirements, the universality, the adaptability and the practicability are strong, the learning capability is strong, and the technological sense of products is improved; in addition, the capacity electrode plate can accurately detect the water level, and a user can set the specified water injection amount during use to ensure that the water injection amount is consistent every time, and the water injection amount can be set by the user at any time to meet the use requirements of different users;
4. Different response electrode slices can form a complete set and set up corresponding suggestion effect, if reach suggestion, warning purpose through light, sound and/or image etc. make the user use more convenient directly perceived, user's use is experienced well, improves market competition.
Drawings
Fig. 1 is a schematic view of an electric kettle according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram of a capacitive liquid level detection structure according to a first embodiment of the present invention.
Fig. 3 is a schematic view of a water level gauge according to a first embodiment of the present invention.
Fig. 4 is a partially enlarged view of the liquid storage container in a water storage state according to the first embodiment of the present invention.
fig. 5 is a circuit diagram of a chip module according to a first embodiment of the invention.
FIG. 6 is a schematic view of a reservoir in a second embodiment of the invention.
Fig. 7 is a schematic view of an electric kettle in a third embodiment of the invention.
Fig. 8 is a schematic view of an electric kettle in a fourth embodiment of the invention.
fig. 9 is a schematic view of an electric kettle in a fifth embodiment of the invention.
Detailed Description
the invention is further described with reference to the following figures and examples.
First embodiment
referring to fig. 1-5, the present embodiment relates to an electric kettle, which is provided with a capacitive liquid level detection structure; the capacitance type liquid level detection structure comprises a liquid storage container A, wherein the liquid storage container A is a kettle body made of glass, and a water level scale C is arranged on the outer surface of the liquid storage container A; more than one induction electrode slice which is not in contact with liquid in the inner cavity of the liquid storage container A is arranged on the outer surface of the liquid storage container A, the more than one induction electrode slices are positioned at different height positions to form a water level gauge C, a distance L is arranged between the induction electrode slices and the inner wall of the liquid storage container A, the distance L is suitable for the induction electrode slices to generate a capacitance value when the liquid reaches the corresponding height position, and therefore the distance L is preferably 0.5 cm; the capacitive liquid level detection structure also comprises a chip module D capable of detecting the capacitance value generated by the sensing electrode slice, wherein the chip module D is provided with an operation chip U2, and the operation chip U2 is connected with more than one sensing electrode slice; when the capacitance value generated by the induction electrode slice changes, the frequency of an oscillating circuit in the chip changes, and the operation chip U2 judges the liquid level through an algorithm according to the change of the frequency; specifically, when the water level reaches the position of the sensing electrode slice, the capacitance value of the sensing electrode slice changes, the capacitance value can change the frequency of the oscillating circuit in the operation chip U2, and the operation chip U2 controls the on and off according to the change of the frequency and then through an algorithm, so that the purpose of monitoring the water level is achieved.
Furthermore, the sensing electrode plates are arranged on the outer side of the side wall of the liquid storage container A in a sticking mode, so that the assembly operation is convenient and rapid, the sensing electrode plates can be conveniently replaced, maintained and the like at the later stage, and particularly, the sensing electrode plates are stuck through the flexible PCB; in addition, the induction electrode plate can also be arranged on the inner side of the side wall of the liquid storage container A in an embedding mode, the structure enables the inner wall and the outer wall of the liquid storage container A to be flat and smooth, the convenience and the cleanness are realized, the integrity is improved, and the appearance is more attractive.
Furthermore, the electric kettle also comprises a main control board B, the main control board B is in communication connection and power supply connection with the chip module D, and the main control board B enters a corresponding working mode according to a liquid level signal fed back by the chip module D.
Further, in the electric kettle, the induction electrode plates comprise an anti-overflow electrode plate T1, a normal heating electrode plate T2, a fast-boiling electrode plate T3 and an anti-dry-burning electrode plate T4 which are arranged from top to bottom and are respectively connected with the chip module D; when the liquid level reaches the position of the anti-overflow electrode plate T1, the capacitance value generated by the sensing electrode plate changes, the frequency of the oscillation circuit changes, the chip module D makes a corresponding judgment and sends a signal instruction to the main control board B, and the main control board B enters a warning mode, namely the main control board B switches off the switch, prohibits the user from boiling water and reminds the user; when the liquid level reaches the position of the normal heating electrode plate T2, the capacitance value generated by the sensing electrode plate changes, the frequency of the oscillation circuit changes, the chip module D makes a corresponding judgment and then sends a signal instruction to the main control board B, and the main control board B enters a normal working mode; when the liquid level reaches the position of the quick cooking electrode slice T3, the capacitance value generated by the sensing electrode slice changes, the frequency of the oscillation circuit changes, the chip module D makes a corresponding judgment and then sends a signal instruction to the main control board B, and the main control board B enters a quick cooking mode; when the liquid level reaches the position of the dry-burning prevention electrode plate T4, the capacitance value generated by the sensing electrode plate changes, the frequency of the oscillation circuit changes accordingly, the chip module D makes corresponding judgment and sends a signal instruction to the main control board B, and the main control board B enters a warning mode, namely the main control board B disconnects the switch, prohibits the user from boiling water, and reminds the user.
further, the electric kettle also comprises a thermistor 8 for calculating the temperature of the liquid in the liquid storage container A; the thermistor 8 is arranged on the outer wall of the liquid storage container A to sense the temperature of the outer wall of the liquid storage container A, and the operation chip U2 is connected with the thermistor 8; when the liquid temperature control device works, the thermistor 8 calculates the liquid temperature in the liquid storage container A according to the temperature of the outer wall of the liquid storage container A through an algorithm.
Furthermore, a sensitivity adjusting circuit for adjusting the sensitivity of the sensing electrode plate is arranged on the chip module D, and the operation chip U2 is connected with the sensitivity adjusting circuit; the sensitivity adjusting circuit and the operation chip U2 can adjust the sensitivity of the sensing liquid level of the sensing electrode plate according to the shape, the wall thickness or different liquids in the liquid storage container and other factors.
Further, the anti-overflow electrode plate T1 is connected with a CX1 port on the operation chip U2, the normal heating electrode plate T2 is connected with a CX2 port on the operation chip U2, the quick-boiling electrode plate T3 is connected with a CX3 port on the operation chip U2, and the anti-dry heating electrode plate T4 is connected with a CX4 port on the operation chip U2; the oscillation circuit is connected with the CTR port on the operation chip U2.
further, the liquid storage container A and/or the main control board B are connected with more than one light-emitting element matched with the corresponding sensing electrode plates, the light-emitting elements comprise a first LED lamp D1 connected with an anti-overflow electrode plate T1, a second LED lamp D2 connected with a normal heating electrode plate T2, a third LED lamp D3 connected with a fast boiling electrode plate T3 and a fourth LED lamp D4 connected with an anti-dry heating electrode plate T4, and when the liquid level reaches the position of the sensing electrode plates, the light-emitting elements matched with the liquid level are lightened up to prompt a user that the water level reaches the corresponding height; in addition, according to actual needs, the main control board B can be further connected with a sound-producing element, the sound-producing element of the embodiment adopts a buzzer, and when the liquid level reaches the position of the sensing electrode plate, the sound-producing element produces corresponding sound to prompt a user that the water level reaches a corresponding height; in addition, according to actual need, main control board B still can connect the display, and when the liquid level arrived induction electrode piece position, the corresponding information of display to the suggestion user water level reaches corresponding height.
furthermore, a communication module is arranged on the main control board B, the communication module is communicated and interconnected with a networking terminal, the liquid level detection information is sent to the networking terminal through the communication module, the networking terminal can be a smart phone, a PC (personal computer) and the like, and a user can check the water level in real time through the networking terminal and perform various operations; in addition, according to actual needs, a remote control module can be further arranged on the main control board B, the remote control module is communicated and interconnected with the remote controller, and the liquid level detection information is sent to the remote controller through the remote control module.
Furthermore, the electric kettle also comprises a power supply base E, the liquid storage container A is detachably arranged above the power supply base E, the main control board B is arranged in the inner cavity of the power supply base E, when the liquid storage container A is placed on the power supply base E, an upper coupler at the bottom of the liquid storage container A is mutually coupled with a lower coupler at the top of the power supply base E, the liquid storage container A is ensured to be stably connected with the power supply base E, and an internal heating body is ensured to be mutually and electrically connected with the main control board B; the chip module D is arranged at the armrest position of the liquid storage container A; the bottom of the liquid storage container A is provided with an upper contact 14, the top of the power supply base E is provided with a lower contact 15, when the liquid storage container A is placed at a designated position on the power supply base E, the upper contact 14 is electrically connected with the lower contact 15, and wired communication connection and/or wired power supply connection between the chip module D and the main control board B are achieved.
Second embodiment
Referring to fig. 6, the capacitive liquid level detection structure according to the present embodiment differs from the first embodiment in that: the liquid storage container A is made of a metal material, in order to avoid the influence of the metal material on the detection effect of the induction electrode plate, a mounting through hole A1 communicated with the inner cavity is formed in the side portion of the liquid storage container A, an insulating part 6 is arranged in the mounting through hole A1, and the induction electrode plate is arranged on the insulating part 6.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
Third embodiment
referring to fig. 7, the capacitive liquid level detection structure according to the present embodiment differs from the first embodiment in that: the electric kettle also comprises a power supply base E, the liquid storage container A is detachably arranged at the top of the power supply base E, and the main control board B and the chip module D are respectively arranged in the inner cavity of the power supply base E; the bottom of a liquid storage container A of the liquid storage container is provided with four upper contact pieces 11 which are respectively in one-to-one correspondence with an anti-overflow electrode slice T1, a normal heating electrode slice T2, a quick-boiling electrode slice T3 and an anti-dry-burning electrode slice T4, and each induction electrode slice is electrically connected with the corresponding upper contact piece 11; the top of the power supply base E of the liquid storage container is provided with four lower contact parts 12 which are respectively in one-to-one correspondence with the upper contact parts 11, and the lower contact parts 12 are electrically connected with the chip module D; when the liquid storage container A of the liquid storage container is placed at a designated position on the power supply base E, the upper contact part 11 is electrically connected with the corresponding lower contact part 12, so that the connection of the sensing electrode plate and the chip module D is realized. Specifically, to ensure that the upper contact 11 and the lower contact 12 are electrically connected to each other, the upper contact 11 and/or the lower contact 12 are arranged in a ring shape.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
Fourth embodiment
Referring to fig. 8, the capacitive liquid level detection structure according to the present embodiment differs from the first embodiment in that: the electric kettle also comprises a power supply base E, the liquid storage container A is detachably arranged at the top of the power supply base E, and the main control board B is arranged in the inner cavity of the power supply base E; the chip module D is arranged at the armrest position of the liquid storage container A; an information transmitting circuit is arranged on the chip module D, an information receiving circuit used for communicating and interconnecting with the information transmitting circuit is arranged on the main control board B, and wireless communication connection between the chip module D and the main control board B is realized; in addition, the power supply connection between the chip module D and the main control board B may adopt the upper and lower contact structures of the first embodiment, or adopt a wireless charging structure to supply power to the chip module D.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
Fifth embodiment
Referring to fig. 9, the capacitive liquid level detection structure according to the present embodiment differs from the first embodiment in that: under the condition of cancelling the power supply base E, the bottom of the liquid storage container A can be provided with an electrical cavity 7, and the main control board B and the chip module D are respectively arranged in the electrical cavity 7.
Other parts not described above are the same as those of the first embodiment, and are not explained in detail here.
The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the invention are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is intended to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A capacitance type liquid level detection structure comprises a liquid storage container (A), wherein a water level scale (C) is arranged on the liquid storage container (A); the method is characterized in that: more than one sensing electrode plates which are not in contact with liquid are arranged on the liquid storage container (A), the more than one sensing electrode plates are positioned at different height positions to form the water level gauge (C), a distance L is formed between the sensing electrode plates and the inner wall of the liquid storage container (A), and the distance L is suitable for the sensing electrode plates to generate capacitance values when the liquid reaches the corresponding height positions; the capacitance type liquid level detection structure also comprises a chip module (D) capable of detecting capacitance values generated by the sensing electrode plates, wherein an operation chip (U2) is arranged on the chip module (D), and the operation chip (U2) is connected with more than one sensing electrode plate; when the capacitance value generated by the induction electrode slice changes, the frequency of an oscillating circuit in the chip changes, and the operation chip (U2) judges the liquid level through an algorithm according to the change of the frequency.
2. The capacitive liquid level detection structure of claim 1, wherein:
The liquid storage container (A) is made of an insulating material;
Or the liquid storage container (A) is made of a metal material, a mounting through hole (A1) is formed in the liquid storage container (A), an insulating part (6) is arranged on the mounting through hole (A1), and the sensing electrode plate is arranged on the insulating part (6).
3. the capacitive liquid level detection structure of claim 1, wherein: the distance L is 0cm-2 cm.
4. The capacitive liquid level detection structure of claim 1, wherein: the induction electrode plate is embedded in the inner side of the side wall of the liquid storage container (A);
Or the induction electrode plate is arranged on the outer side of the side wall of the liquid storage container (A).
5. An electric kettle is characterized in that: comprises a main control panel (B) and the capacitance type liquid level detection structure as claimed in claim 1; the main control board (B) is in communication connection and power supply connection with the chip module (D), and enters a corresponding working mode according to a liquid level signal fed back by the chip module (D); the liquid storage container (A) is a kettle body for storing water.
6. The electric kettle of claim 5, wherein: the electric kettle also comprises a thermistor (8) used for calculating the temperature of liquid in the liquid storage container (A), the thermistor (8) is arranged on the outer wall of the liquid storage container (A), and the operation chip (U2) is connected with the thermistor (8); and/or a sensitivity adjusting circuit for adjusting the sensitivity of the sensing liquid level of the sensing electrode plate is arranged on the chip module (D), and the operation chip (U2) is connected with the sensitivity adjusting circuit.
7. The electric kettle of claim 5, wherein: the induction electrode plate comprises an anti-overflow electrode plate (T1), a normal heating electrode plate (T2), a quick-boiling electrode plate (T3) and an anti-dry heating electrode plate (T4) which are respectively connected with the chip module (D); when the liquid level reaches the position of the anti-overflow electrode slice (T1), the main control board (B) enters an alarm mode; when the liquid level reaches the position of the normal heating electrode plate (T2), the main control board (B) enters a normal working mode; when the liquid level reaches the position of the quick cooking electrode slice (T3), the main control board (B) enters a quick cooking mode; when the liquid level reaches the position of the dry burning prevention electrode slice (T4), the main control board (B) enters a warning mode.
8. The electric kettle of claim 5, wherein: the liquid storage container (A) and/or the main control board (B) are/is connected with more than one luminous element matched with the corresponding sensing electrode plates, and when the liquid level reaches the sensing electrode plates, the luminous elements matched with the sensing electrode plates light up;
And/or the main control board (B) is connected with a sound generating element, and when the liquid level reaches the induction electrode slice, the sound generating element generates corresponding sound;
And/or the main control board (B) is connected with a display, and when the liquid level reaches the induction electrode plate, the display displays corresponding information.
9. the electric kettle of claim 5, wherein: the main control board (B) is provided with a communication module, the communication module is communicated and interconnected with the networking terminal, and the liquid level detection information is sent to the networking terminal through the communication module;
And/or, a remote control module is arranged on the main control board (B), the remote control module is communicated and interconnected with the remote controller, and the liquid level detection information is sent to the remote controller through the remote control module.
10. The electric kettle of claim 5, wherein: the electric kettle also comprises a power supply base (E), the liquid storage container (A) is detachably arranged on the power supply base (E), and the main control board (B) is arranged on the power supply base (E); the chip module (D) is arranged on the liquid storage container (A); an upper contact piece (14) is arranged on the liquid storage container (A), a lower contact piece (15) is arranged on the power supply base (E), when the liquid storage container (A) is placed on the power supply base (E), the upper contact piece (14) is electrically connected with the lower contact piece (15), and wired communication connection and/or wired power supply connection between the chip module (D) and the main control board (B) are realized;
Or the electric kettle further comprises a power supply base (E), the liquid storage container (A) is detachably arranged on the power supply base (E), and the main control board (B) and the chip module (D) are respectively arranged on the power supply base (E); more than one upper contact piece (11) which corresponds to the sensing electrode pieces one by one is arranged on the liquid storage container (A), and the sensing electrode pieces are connected with the corresponding upper contact pieces (11); more than one lower contact parts (12) which correspond to the upper contact parts (11) one by one are arranged on the power supply base (E), and more than one lower contact parts (12) are connected with the chip module (D); when the liquid storage container (A) is placed on the power supply base (E), the upper contact part (11) is electrically connected with the corresponding lower contact part (12), so that the connection between the induction electrode plate and the chip module (D) is realized;
Or the electric kettle also comprises a power supply base (E), the liquid storage container (A) is detachably arranged on the power supply base (E), and the main control board (B) is arranged on the power supply base (E); the chip module (D) is arranged on the liquid storage container (A); the chip module (D) is provided with an information transmitting circuit, the main control board (B) is provided with an information receiving circuit used for communicating and interconnecting with the information transmitting circuit, and wireless communication connection between the chip module (D) and the main control board (B) is realized;
Or, be equipped with electric chamber (7) on stock solution container (A), main control board (B) and chip module (D) set up respectively in electric chamber (7).
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| CN201910788874 | 2019-08-26 | ||
| CN2019107888740 | 2019-08-26 |
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