CN111076789A - Water level detection device, water level detection method and water storage device - Google Patents
Water level detection device, water level detection method and water storage device Download PDFInfo
- Publication number
- CN111076789A CN111076789A CN201911347097.2A CN201911347097A CN111076789A CN 111076789 A CN111076789 A CN 111076789A CN 201911347097 A CN201911347097 A CN 201911347097A CN 111076789 A CN111076789 A CN 111076789A
- Authority
- CN
- China
- Prior art keywords
- detection
- water storage
- storage device
- water level
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
-
- 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
-
- 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
- A47J36/00—Parts, details or accessories of cooking-vessels
-
- 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
- A47J2203/00—Devices having filling level indicating means
Abstract
The invention discloses a water level detection device, a water level detection method and a water storage device, wherein the water level detection device comprises: the detection component is arranged at the bottom of the water storage device and extends upwards, an inner core of the detection component is a conductor, and at least three insulating materials are wrapped on the outer wall of the inner core; the electrode is arranged at the maximum water level of the water storage device and is connected with the inner core of the detection component; a conductive member disposed opposite to the detection member; and the detection circuit is connected with the electrode and outputs a liquid level height signal. The water level detection device is convenient for real-time monitoring of the liquid level height in the water storage device, facilitates water level adjustment of the water storage device, can monitor the highest water level by arranging the electrode at the highest position, and avoids overflow caused by excessive water inflow of the water storage device.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a water level detection device, a water level detection method and a water storage device.
Background
Along with the gradual improvement of the living standard of people, intelligent household appliances gradually enter the lives of the masses. The electric kettle has the advantages of high heating speed, good heat preservation effect, strong filtering function, multiple styles and the like, and is developing towards multifunction along with the needs of life. When a user uses the automatic water inlet electric kettle, the water level of the electric kettle can be continuously changed, so that the detection of the water level in the kettle is very important. The existing automatic water adding tea set generally avoids excessive water adding by setting the highest water level and the lowest water level, and the tea set is inconvenient to adjust because the highest water level is added by adding water once.
The principle of judging water level information of a part of automatic water inlet electric kettles in the market at present is that the electric conductivity of water is realized or utilized by utilizing a capacitor structure formed by water and a kettle body. Electrode type detection is carried out by utilizing the conductivity of water, and an electrode is in direct contact with the water, however, the interference is large and the error of the measured water level is large due to different conductivities of different water qualities. The other part adopts a plurality of capacitive sensors or resistance sensors to be vertically arranged on the kettle body, the measured water level has larger falling section, and the water level can not be monitored in real time.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects that the water level of the water storage device cannot be monitored in real time and is inconvenient to adjust in the prior art, so as to provide a water level detection device, a water level detection method and a water storage device.
According to a first aspect, an embodiment of the present invention provides a water level detection apparatus, including: the detection component is arranged at the bottom of the water storage device and extends upwards, an inner core of the detection component is a conductor, and at least three insulating materials are wrapped on the outer wall of the inner core; the electrode is arranged at the maximum water level of the water storage device and is connected with the inner core of the detection component; a conductive member disposed opposite to the detection member; and the detection circuit is connected with the electrode and outputs a liquid level height signal.
With reference to the first aspect, in a first embodiment of the first aspect, the conductive member is a metal inner wall of the water storage device.
With reference to the first aspect, in a second implementation manner of the first aspect, the insulating material is wrapped on the detection component in a vertically layered manner, and the dielectric constants of the insulating materials are different and increase layer by layer from bottom to top.
With reference to the second embodiment of the first aspect, in a third embodiment of the first aspect, the wrapping height of each layer of the insulating material on the detection part is the same.
With reference to the first aspect, in a fourth implementation manner of the first aspect, the detection circuit includes a frequency signal generation circuit, a liquid level detection circuit, and a clamping circuit.
With reference to the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the frequency signal generating circuit and the liquid level detection circuit are connected to the conductive member and the inner core or conductive member of the detection member.
According to a second aspect, an embodiment of the present invention provides a water storage apparatus, which includes the water level detection apparatus of the first aspect or any of the embodiments of the first aspect.
With reference to the second aspect, in a first embodiment of the second aspect, the water storage device comprises an electric kettle or a water heater or an electric tea kettle.
With reference to the second aspect or the first embodiment of the second aspect, in a second embodiment of the second aspect, the inner core of the detection member is connected to the electrode through a lead wire.
With reference to the second embodiment of the second aspect, in a third embodiment of the second aspect, the wire is disposed within a handle of an electric kettle; and/or the conducting wire is arranged on the kettle body of the electric kettle; and/or the lead is arranged on the chassis of the electric kettle.
In a fourth embodiment of the second aspect in combination with the third embodiment of the second aspect, the detection circuit is provided in a chassis of the electric kettle or water heater or electric teapot.
According to a third aspect, an embodiment of the present invention provides a water level detection method, for a water level detection apparatus as described in the first aspect or any of the embodiments of the first aspect, including: acquiring an output voltage value of the detection circuit; judging whether the voltage value exceeds a preset threshold value or not, wherein the preset threshold value comprises a plurality of values and is determined according to the insulating material corresponding to the detection component; and if the voltage value exceeds the preset threshold value, determining the height of the water level according to the insulating material corresponding to the preset threshold value.
With reference to the second aspect, in a first embodiment of the second aspect, the number of the preset threshold is determined according to the number of the insulating materials.
The technical scheme of the invention has the following advantages:
1. according to the water level detection device provided by the invention, the detection component extending upwards is arranged at the bottom of the water storage device, the inner core of the detection component is a conductor, the outer wall of the inner core is wrapped by at least three insulating materials, the electrode is arranged at the maximum water level of the water storage device and is mutually connected with the inner core of the detection component, the conductive component is arranged in the water storage device and is opposite to the detection component, and the detection circuit is arranged and is connected with the electrode to output a liquid level height signal, so that the liquid level height in the water storage device can be conveniently monitored in real time, the water level adjustment of the water storage device is facilitated, and the highest water level can be monitored by arranging the electrode at the highest position, so that the overflow caused by excessive water inlet of the.
2. The water storage device provided by the invention comprises a water level detection device, wherein the water level detection device can monitor the liquid level height of the electric kettle in real time, and a lead for connecting an inner core of a detection component and an electrode is arranged in a handle of the electric kettle; and/or the conducting wire is arranged in the kettle body of the electric kettle; and/or in the chassis of the electric kettle, and the detection circuit is arranged in the chassis of the electric kettle or the water heater or the electric kettle, so that the attractiveness of the water storage device is improved on the basis of ensuring the monitoring accuracy of the liquid level height of the water storage device.
3. According to the water level detection method provided by the invention, the voltage values at the two ends of the resistor are obtained, and the height of the water level in the water storage device is determined according to the relation between the voltage values and the preset threshold value, so that the liquid level height in the water storage device can be monitored in real time, and the accuracy of monitoring the liquid level height is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic block diagram of a water level detecting apparatus in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a detection circuit in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of an electric kettle in embodiment 2 of the present invention;
fig. 4 is a flowchart of a water level detection method in embodiment 3 of the present invention.
Reference numerals:
11-a detection component; 111-an inner core; 112-an insulating material; 12-an electrode; 13-a conductive member; 14-a detection circuit; 31-a kettle body; 311-metal inner wall; 312-metal terminals; 32-a chassis; 33-a metal rod; 34-a coupler; 35-pot handle.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a water level detection device which can be used for detecting the water level of a water storage device for automatically adding water, and comprises a detection part 11, an electrode 12, a conductive part 13 and a detection circuit 14 as shown in figure 1.
Wherein, the detection component 11 is arranged at the bottom of the water storage device and extends upwards, as shown in fig. 1, the detection component 11 is in a columnar structure, the inner core 111 of the detection component is a conductor, at least three insulating materials 112 are wrapped on the outer wall of the inner core 111, and the dielectric constant of each insulating material is different, so that when an equivalent capacitor is formed, the water level detection error caused by the liquid temperature rise can be counteracted, and the water level detection precision is improved.
The electrode 12 is disposed at the maximum water level of the water storage means and connected to the inner core 111 of the sensing part 11. The electrodes 12 can be disposed on the inner wall of the water storage device corresponding to the maximum water level, and when the maximum water level is reached, the water supply is stopped, so as to avoid overflow and leakage of the water storage device caused by excessive water supply.
And a conductive member 13 disposed opposite the detection member 11. After the inner core of the detection component 11 is electrified, the conductive component 13 is used to form a capacitor with the detection component 11, so the conductive component 13 can be a metal inner wall of the water storage device, a metal plate attached to the inner wall of the water storage device, or a metal plate arranged in the water storage device opposite to the detection component 11.
And the detection circuit 14 is connected with the electrode 12 and outputs a liquid level height signal. The frequency signal generating circuit may include a first connector for generating a pulsating direct current voltage signal of a certain frequency, and inputting the pulsating direct current voltage signal to the signal detecting circuit, and the signal detecting circuit may include a second connector and a main control chip, and the first connector and the second connector contact the liquid to be detected to form an equivalent capacitor. The main control chip end of the signal detection circuit can be connected with an output resistor, and when the equivalent capacitance changes, the voltage at the two ends of the output resistor changes. When the water level height increases, the equivalent capacitance induction capacitance value increases, the voltage at the two ends of the output resistor rises, when the water level rises to the joint of the insulating materials with different dielectric constants, the equivalent capacitance induction capacitance value suddenly rises, then the equivalent capacitance induction capacitance value continues to increase along with the rise of the water level, and the main control chip judges the water level height in the water storage device according to the detected voltage value change at the two ends of the output resistor.
Above-mentioned water level detection device, through set up the detection part who upwards extends in water storage device's bottom, set up detection part's inner core into the conductor, and at least three kinds of insulating material of outer wall parcel at the inner core, maximum water level department at water storage device sets up the electrode, with detection part's inner core interconnect, it is relative with detection part to set up electrically conductive parts in water storage device, and set up detection circuitry and be connected with the electrode, output liquid level height signal, be convenient for the liquid level height among the real time monitoring water storage device, water storage device's water level control has been made things convenient for, compare in prior art in direct water level with water storage device's highest position, more accord with masses' user demand, in addition, through setting up the electrode at highest position, can monitor the highest water level, avoided water storage device to intake too much and lead to overflowing.
Illustratively, the inner core 111 of the detecting member 11 is made of a metal material, which may be a conductive metal such as iron, copper, steel, etc., and the outer surface of the inner core 111 is wrapped with at least three insulating materials 112 with different dielectric constants. The electrode 12 may be disposed on the inner metal wall of the water storage device, and connected to the inner core 111 of the detection component 11 through a metal wire, and the outside of the electrode 12 may be wrapped with an insulating material having a small dielectric constant so as to be negligible, so that the electrode 12 plays an insulating role in the water storage device.
As an optional embodiment of the present application, the insulating material 112 is wrapped on the detection component 11 in layers, and the dielectric constants of the insulating material 112 are different and increase layer by layer from bottom to top. The insulating material 112 may be uniformly wrapped on the inner core 111 in layers, or may be non-uniformly wrapped on the inner core 111 in layers, the wrapping height of the insulating material 112 depends on the shape of the water storage device, and if the water storage device is a regular container, such as a cylinder, the insulating material 112 with different dielectric constants may be wrapped on the inner core 111 in layers at a uniform height; if the water storage device is an irregular container, the insulating materials 112 with different dielectric constants need to be set according to the water storage volume of the water storage device, for example, the water storage device is conical, and the heights of the insulating materials 112 with different media wrapped by the inner core from bottom to top are sequentially increased. The height setting of the insulating material 112 with different dielectric constants is not limited in the present application, and those skilled in the art can determine the height setting according to the shape of the water storage device actually used. The thickness of the insulating material 112 wrapping the inner core 111 also affects the accuracy of water level detection, data testing can be performed according to the actual manufacturing process of the water storage device, and the optimal wrapping thickness is selected.
The dielectric constant of the insulating material 112 increases layer by layer from bottom to top, when liquid is added into the water storage device, the temperature rise of the liquid may interfere with the detection accuracy of the liquid level height, and in order to avoid interference caused by the temperature rise of the liquid, the insulating material 112 is set to increase the dielectric constant layer by layer, so that the liquid level detection interference caused by the temperature rise of the liquid can be submerged by the obvious increase of the dielectric constant. The dielectric constant of the insulating material 112 is not limited in this application, and can be determined by one skilled in the art according to actual needs. The inner core 111 is wrapped with the insulating materials 112 with different dielectric constants, so that the jump state of the water level can be accurately monitored.
As an alternative embodiment of the present application, the detection circuit 14 may include a frequency signal generating circuit, a signal detection circuit, and a clamping circuit, as shown in fig. 2, wherein the frequency signal generating circuit may include a dc power source VCC, a first switch circuit, a first resistor R1, a second resistor R2, and a second switch circuit, which are connected in series in sequence, and the other end of the second switch circuit is grounded; the first switch circuit and the second switch circuit are respectively connected with a control circuit for controlling the on-off of the first switch circuit and the second switch circuit; a first capacitor C1 connected in parallel with the second resistor R2 and the second switch circuit; a first connector X1 is connected between the first resistor R1 and the second resistor R2. The signal detection circuit comprises a second connector X2, a first diode D1, a second diode D2, a second capacitor C2 and a main control chip; the cathode of the first diode D1 is connected with the output resistor R3, and the anode of the first diode D1 is connected with the second connector X2; the other end of the output resistor R3 is connected with the AD end of the main control chip; the cathode of the second diode D2 is connected with the anode of the first diode D1, and the anode is grounded; one end of the second capacitor C2 is connected to the cathode of the first diode D1, and the other end is grounded; a clamping circuit is connected between the second capacitor C2 and the output resistor R3; the first connector X1 and the second connector X2 are used for contacting with the liquid to be detected to form an equivalent capacitor CP, the first connector X1 is a conductive component 13 of a water storage device containing water, and the second connector X2 is an inner core 111 of the detection component 11; or the second joint X2 is the conductive component 13 of the water storage device, and the first joint X1 is the inner core 111 of the detection component 11; when the water level in the water storage device exceeds the height of the detection part, the first joint X1 is the conductive part 13 of the water storage device containing water, and the second joint X2 is the electrode 12; alternatively, the second joint X2 is the conductive member 13 of the water storage device, and the first joint X1 is the electrode 12. The clamping circuit can be composed of a clamping diode, limits the potential of the output point of the detection circuit, and clamps the potential by utilizing the forward conduction characteristic of the diode so as to enable the potential to be not more than the voltage value of the reference end. The detection circuit is not limited in the present application, and can be determined by those skilled in the art according to actual needs.
The inner core 111 and the conductive part 13 are used as two poles, the insulating material 112 and the liquid are used as media, an equivalent capacitor is formed, when the water storage device is empty of water, the media between the two poles of the equivalent capacitor are air and the insulating material, the capacitance value is minimum, and the voltage value at two ends of the output resistor of the detection circuit 14 is minimum; when liquid is injected into the water storage device, the liquid replaces air, the medium between the two electrodes of the equivalent capacitor is liquid and insulating materials, the capacitance value is increased along with the increase of the liquid, when the liquid in the water storage device rises to the junction of the two insulating materials, the dielectric constant of the medium changes suddenly, the capacitance value rises suddenly, the voltage value at the two ends of the output resistor changes suddenly, and the liquid level height in the water storage device can be determined according to the relation between the voltage value and the liquid level height. When the liquid level in the water storage device is in contact with the electrodes, the medium between the two electrodes of the equivalent capacitor is liquid, the two electrodes are conducted, the voltage value of the output resistor reaches the maximum value, the liquid level can be determined to reach the highest water level, and the water adding is stopped. The insulating materials with different dielectric constants are arranged on the inner core of the detection component, so that sensitive monitoring can be realized for different liquid level heights.
When the water level in the water storage device becomes high, the equivalent capacitor CP becomes large, the capacitive reactance XC becomes small, and the amplitude of an alternating current signal coupled to the other end of the equivalent capacitor becomes large, so that the voltage value of the two ends of the output resistor detected by the main control chip becomes large; when the water level in the water storage device becomes low, the equivalent capacitor CP becomes small, the capacitance capacitive reactance XC becomes large, the amplitude of an alternating current signal coupled to the other end of the equivalent capacitor becomes small, the voltage value at two ends of the output resistor detected by the main control chip becomes small, and therefore the real-time detection of the water level of the electric kettle is realized. When the water level in the water storage device exceeds the height of the detection part and reaches the highest water level, the conductive part 13 and the electrode 12 are contacted together through liquid, namely two electrodes of the equivalent capacitor are conducted, the voltage value at two ends of the output resistor reaches the maximum value, and the voltage value at two ends of the output resistor is controlled to be 5V at the maximum value due to the clamping effect of the clamping circuit on the voltage of the output resistor.
Example 2
The embodiment provides a water storage device, which comprises any one of the water level detection devices in the embodiments. The water storage device can be an electric kettle, a water heater or an electric kettle. Taking an electric kettle as an example, as shown in fig. 3, the electric kettle comprises a kettle body 31, a chassis 32 and a metal rod 33; the inner wall of the kettle body 31 is a metal inner wall; the metal rod 33 is arranged inside the kettle body 31 and vertically abutted against the bottom plate 32, and the detection circuit 14 is arranged in the bottom plate 32. The metal rod 33 is externally wrapped by insulating materials 112 with different dielectric constants, a metal terminal 312 is arranged on the metal inner wall 311 of the kettle body 31, the height of the metal terminal 312 is greater than that of the metal rod 33, the metal terminal is arranged at the highest water level of the electric kettle, and the metal terminal 312 is connected with the metal rod 33 through a conducting wire.
The metal inner wall 311 of the body 31 of the electric kettle is used as the conductive member 13, the metal rod 33 is used as the inner core 111 of the detection member 11, and the metal terminal 312 is used as the electrode 12. Through set up the metal rod that upwards extends on the chassis at insulating pot, four kinds of insulating material of parcel on the outer wall of metal rod, maximum water level department at water storage device sets up the metal terminal, be connected with the metal rod electricity each other, because electrically conductive parts are the metal inner wall of insulating pot, can form equivalent capacitance with the metal rod that sets up inside the insulating pot relatively, it is connected with the electrode to set up detection circuitry in the chassis of insulating pot, can convert the output voltage at its output resistance both ends into liquid level height, be convenient for the liquid level height among the real time monitoring water storage device, compare in prior art directly with the highest water level department that adds the water level to the insulating pot, the design of this insulating pot more accords with masses' user demand, in addition, set up the metal terminal through the highest position at the insulating pot, when having avoided the automatic watering of insulating pot, it is too much and lead to overflow to intake.
Illustratively, a coupler 34 is arranged at the bottom of a kettle body 31 of the electric kettle and used for connecting the kettle body 31 of the electric kettle with a chassis 32, an automatic water filling port is arranged in a channel of the coupler, and a power supply positive line, a power supply negative line, a water level signal detection line, a control power supply positive line and a control power supply ground can also be arranged; can also set up liquid level display device in the outside of insulating pot, this display device is the display screen, shows the liquid level height in the insulating pot, and chassis 32 is inside to set up and to show touch circuit, controls the liquid level display device of the outside setting of insulating pot, and convenience of customers adjusts the liquid level height in the insulating pot according to actual need, the liquid level height in the real time monitoring insulating pot of being convenient for.
As an alternative embodiment of the present application, the metal rod 33 and the metal terminal 312 may be connected by a wire, which is disposed in a handle of the electric kettle; and/or the kettle body is arranged on the electric kettle; and/or a chassis arranged on the electric kettle.
Illustratively, the handle 35 of the electric kettle may be hollow, and the conducting wire may be a metal wire, which may connect the metal rod 33 and the metal terminal 312 by routing in the handle 35; and/or the metal rod 33 and the metal terminal 312 are connected by routing between the outer wall of the kettle body 31 and the metal inner wall 311 of the electric kettle, and/or the metal rod 33 and the metal terminal 312 are connected by routing between the chassis 32 of the electric kettle. The kettle body of the electric kettle and/or the chassis of the electric kettle are/is wired through the kettle handle, so that the attractiveness of the electric kettle is guaranteed, the phenomenon that the detection circuit is in contact with liquid to generate electric conduction due to connection between the detection circuit and the metal rod and the metal terminal is avoided, the accuracy of water level detection is influenced, and the safety of operation of the detection circuit is guaranteed.
As an alternative embodiment of the present application, the detection circuit 14 is disposed in the chassis of the electric kettle. Illustratively, the first connector X1 of the detection circuit 14 is a metal inner wall 311 of the electric kettle, the second connector X2 is a metal rod 33, the metal rod 33 and the metal inner wall can be used as two poles, and the insulating material and the liquid can be used as media, so as to form an equivalent capacitor, when no water exists in the electric kettle, the media between the two poles of the equivalent capacitor are air and the insulating material, the capacitance value is minimum, and the voltage value across the output resistor of the detection circuit 14 is minimum; when liquid is injected into the electric kettle through the automatic water filling port, the liquid replaces air, the medium between the two poles of the equivalent capacitor is liquid and made of insulating materials, the equivalent capacitance value is increased along with the rising of the liquid, when the liquid in the electric kettle rises to the layered position of the insulating materials wrapped on the metal rod 33, the dielectric constant of the medium between the two poles of the equivalent capacitor is equivalent to sudden change, the capacitance value is caused to suddenly rise, the voltage values at the two ends of the output resistor suddenly change, and the liquid level height in the water storage device is determined according to the relation between the voltage values and the liquid level height. When the liquid level in the electric kettle is in contact with the electrodes, namely the first joint X1 of the detection circuit 14 is the metal inner wall 311 of the electric kettle, the second joint X2 is the metal terminal 312, the medium between the two poles of the equivalent capacitor is liquid, which is equivalent to the conduction of the two poles of the equivalent capacitor, the voltage value of the output resistor reaches the maximum value, the liquid level can be determined to reach the highest water level, and the water adding is stopped. Through set up detection circuitry in the chassis of insulating pot, guaranteed the security of detection circuitry operation, promoted the aesthetic property of insulating pot outward appearance, avoid the detection circuitry and metal rod and metal terminal between be connected contact liquid and produce electrically conductive phenomenon, influence the accuracy that the water level detected.
Example 3
The embodiment provides a water level detection method, which can be used for water level detection of an automatic water adding and storing device, as shown in fig. 4, the method includes:
and S31, acquiring the output voltage value of the detection circuit.
For example, the output voltage value of the detection circuit may be obtained by a voltage measurement instrument, or may be calculated according to the action principle of the detection circuit. As shown in fig. 2, the output voltage value is a voltage value at two ends of an output resistor R3 in the detection circuit, the output resistor R3 is directly related to the liquid level change of the water storage device, and when the liquid level in the water storage device changes, the voltage value at two ends of the output resistor R3 changes. As an alternative embodiment, a display device may be provided outside the water storage device for displaying a change in the voltage value; the voltage value can be converted into the liquid level height to be displayed on the display device, and a user can monitor the liquid level height in the water storage device in real time according to data displayed on the display device.
And S32, judging whether the voltage value exceeds a preset threshold value, wherein the preset threshold value comprises a plurality of values and is determined according to the insulating material corresponding to the detection component.
For example, since the dielectric constants of the insulating materials disposed on the detection member are different, corresponding preset thresholds may be set according to the different insulating materials, and the preset thresholds may be determined according to the different dielectric constants of the insulating materials of the detection member. When the liquid level in the water storage device is in the same insulating material, the voltage value of the output resistor R3 is increased along with the increase of the water level, but the voltage is increased beyond the preset threshold. When the boundary of two insulating materials with different dielectric constants is reached, the voltage value is suddenly changed and exceeds a preset threshold value, namely the voltage value obviously exceeds the voltage value increase caused by liquid level change. And determining the liquid level height in the water storage device by judging whether the change of the voltage value exceeds a preset threshold value.
And S33, if the voltage value exceeds the preset threshold, determining the height of the water level according to the insulating material corresponding to the preset threshold.
For example, when the change of the voltage value exceeds a preset threshold value, that is, the liquid level height in the water storage device is transited from one insulating material to another insulating material on the detection component, the arrangement of the insulating materials with different dielectric constants in the water storage device may be equal in height, and the dielectric constant of the insulating material is increased layer by layer, so that the liquid level height in the water storage device, that is, the height of the water level, may be obtained by combining the arrangement height of the insulating material in the water storage device with the relationship between the change of the voltage value and the preset threshold value.
The first connector X1 and the second connector X2 of the detection circuit 14 can be connected with the detection part and the conductive part of the water storage device to form an equivalent capacitor. When liquid is filled in the water storage device, the insulating material and the liquid can be used as a medium of the equivalent capacitor; when no water is in the electric kettle, the medium between the two poles of the equivalent capacitor is air and insulating material, the capacitance value is minimum, and the output voltage value of the detection circuit 14 is minimum. The water storage device takes an electric kettle as an example, when liquid is injected into the electric kettle, the liquid replaces air, a medium between two poles of the equivalent capacitor is a liquid state and an insulating material, the equivalent capacitance value is increased along with the rise of the liquid, when the liquid in the electric kettle rises to a layered position of the insulating material wrapped on the detection part, the dielectric constant of the medium between the two poles of the equivalent capacitor is equivalent to sudden change, the capacitance value is suddenly increased, the output voltage value is suddenly changed, and the liquid level height of the water storage device is determined according to the relation between the voltage value and the liquid level height. When the liquid level in the electric kettle exceeds the detection component, namely the medium between two poles of the equivalent capacitor is liquid, namely two poles of the equivalent capacitor are conducted, the voltage value of the output resistor reaches the maximum value, the liquid level can be determined to reach the highest water level, and water adding is stopped.
According to the water level detection method provided by the embodiment, the height of the water level in the water storage device is determined by acquiring the voltage values at the two ends of the resistor and according to the relation between the voltage values and the preset threshold value, the liquid level height in the water storage device can be monitored in real time, and the accuracy of monitoring the liquid level height is improved.
As an alternative embodiment of the present application, the number of preset thresholds is determined according to the number of said insulating materials. Illustratively, a plurality of insulating materials with different dielectric constants can be wrapped on the detection part, and taking 3 insulating materials with different dielectric constants wrapped on the detection part as an example, the insulating materials are respectively represented by a1, a2 and A3, and the dielectric constants of a1, a2 and A3 are raised layer by layer. When the liquid level in the water storage device is within the height of A1, the output voltage value increases with the increase of the water level, but the voltage does not exceed the preset threshold, and if the voltage value change of the height of A1 is set as the preset threshold a1, the voltage value does not exceed the preset threshold a 1. When the boundary between a1 and a2 is reached, the output voltage value changes suddenly and exceeds the preset threshold value a1, namely the change value of the output voltage obviously exceeds the voltage value increase caused by the liquid level change. Similarly, if the voltage value of the height at which a2 is located is changed to be the preset threshold a2, when the boundary between a2 and A3 is reached, the output voltage value changes abruptly and exceeds the preset threshold a 2. And determining the liquid level height in the water storage device by judging whether the change of the output voltage value exceeds a preset threshold value.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (13)
1. A water level detection apparatus, comprising:
the water storage device comprises a detection component (11), an inner core (111) of the detection component is a conductor, and the outer wall of the inner core is wrapped by at least three kinds of insulating materials (112);
the electrode (12) is arranged at the maximum water level of the water storage device and is connected with the inner core of the detection component;
a conductive member (13) provided opposite to the detection member;
and the detection circuit (14) is connected with the electrodes and outputs a liquid level height signal.
2. The device according to claim 1, characterized in that the electrically conductive member (13) is a metal inner wall of the water storage device.
3. The device according to claim 1, characterized in that the insulating material (112) is wrapped on the detection part (11) in layers from top to bottom, the dielectric constants of the insulating material (112) are different, and the dielectric constant of the insulating material (112) increases layer by layer from bottom to top.
4. A device according to claim 3, characterized in that each layer of said insulating material (112) is wrapped to the same height on said detection member (11).
5. The apparatus of claim 1, wherein the detection circuit comprises a frequency signal generation circuit, a signal detection circuit, and a clamping circuit.
6. The device according to claim 5, characterized in that said frequency signal generating circuit and said level detection circuit connect said conductive element (12) and said inner core (111) or conductive element (13) of said detection element (11).
7. A water storage apparatus, characterized in that the water storage apparatus comprises the water level detection apparatus as claimed in any one of claims 1 to 6.
8. The apparatus of claim 7, wherein the water storage means comprises an electric kettle or water heater or electric tea kettle.
9. The device according to claim 7 or 8, characterized in that the inner core (111) of the detection member (11) is connected to the electrode (12) by a wire.
10. The apparatus of claim 9, wherein the wire is disposed within a handle of an electric kettle; and/or the conducting wire is arranged on the kettle body of the electric kettle; and/or the lead is arranged on the chassis of the electric kettle.
11. Device according to claim 10, characterized in that the detection circuit (14) is arranged in the chassis of the electric kettle or water heater or electric tea kettle.
12. A water level detection method for a water level detection apparatus according to any one of claims 1 to 6, comprising:
acquiring an output voltage value of the detection circuit;
judging whether the voltage value exceeds a preset threshold value or not, wherein the preset threshold value comprises a plurality of values and is determined according to the insulating material corresponding to the detection component;
and if the voltage value exceeds the preset threshold value, determining the height of the water level according to the insulating material corresponding to the preset threshold value.
13. The method according to claim 12, wherein the number of the preset threshold values is determined according to the number of the insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911347097.2A CN111076789A (en) | 2019-12-24 | 2019-12-24 | Water level detection device, water level detection method and water storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911347097.2A CN111076789A (en) | 2019-12-24 | 2019-12-24 | Water level detection device, water level detection method and water storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111076789A true CN111076789A (en) | 2020-04-28 |
Family
ID=70317245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911347097.2A Pending CN111076789A (en) | 2019-12-24 | 2019-12-24 | Water level detection device, water level detection method and water storage device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111076789A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854888A (en) * | 2020-07-25 | 2020-10-30 | 珠海格力电器股份有限公司 | Water level detection method and device, storage medium and kettle |
| CN112869556A (en) * | 2021-01-12 | 2021-06-01 | 珠海格力电器股份有限公司 | Liquid level detection method and device, storage medium and kettle |
| CN113155234A (en) * | 2021-04-25 | 2021-07-23 | 上海钛米机器人股份有限公司 | Liquid level detection system, method, device, computer device and readable storage medium |
| CN114441238A (en) * | 2020-11-04 | 2022-05-06 | 深圳市帝迈生物技术有限公司 | Sampling device, analyzer and sampling method for analyzer |
-
2019
- 2019-12-24 CN CN201911347097.2A patent/CN111076789A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854888A (en) * | 2020-07-25 | 2020-10-30 | 珠海格力电器股份有限公司 | Water level detection method and device, storage medium and kettle |
| CN111854888B (en) * | 2020-07-25 | 2021-07-02 | 珠海格力电器股份有限公司 | Water level detection method and device, storage medium and kettle |
| CN114441238A (en) * | 2020-11-04 | 2022-05-06 | 深圳市帝迈生物技术有限公司 | Sampling device, analyzer and sampling method for analyzer |
| CN112869556A (en) * | 2021-01-12 | 2021-06-01 | 珠海格力电器股份有限公司 | Liquid level detection method and device, storage medium and kettle |
| CN113155234A (en) * | 2021-04-25 | 2021-07-23 | 上海钛米机器人股份有限公司 | Liquid level detection system, method, device, computer device and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111076789A (en) | Water level detection device, water level detection method and water storage device | |
| CN100401024C (en) | Water level sensor | |
| CN106289449B (en) | Capacitance type water level and water amount detection device, water boiling kettle and detection method | |
| KR101263534B1 (en) | Method and apparatus for sensing liquid level using baseline characteristic | |
| EP1811274A1 (en) | Water level measurement system | |
| CN101979967B (en) | Liquid level detecting device | |
| JP2004526170A (en) | Capacitive fuel sensor | |
| CN208155403U (en) | Water-level detecting device | |
| CN107782408A (en) | Liquid level detection circuit, liquid-level detecting method and wall-breaking machine | |
| CN102435257B (en) | Liquid level sensor and liquid level detection method thereof | |
| CN211346990U (en) | Water level detection device and water storage device | |
| CN101819055A (en) | Liquid level detection device | |
| CN107126088B (en) | Heating container | |
| CN103637681B (en) | Electric heating cooker with anti-overflow structure and overflow judgment method | |
| CN201624537U (en) | Multifunctional sensor for soymilk maker | |
| CN209003575U (en) | A kind of heating device with liquid level and anti-dry monitoring function | |
| CN107692817A (en) | A kind of Intelligent electric kettle with high-low water level detection | |
| CN204670921U (en) | A kind of condenser type water level and flow checkout gear and kettle thereof | |
| CN207520019U (en) | Heating container | |
| CN107884032B (en) | Electric cooker and anti-overflow detection device for same | |
| CN204535125U (en) | Electric heater and control circuit thereof | |
| CN116406962A (en) | Cooking device, control method and control device thereof, and readable storage medium | |
| CN210922766U (en) | Capacitive continuous liquid level detection structure and electric kettle thereof | |
| CN206761570U (en) | Food cooking machine | |
| CN207768149U (en) | The anti-overflow detection device of capacitance for cooking apparatus and cooking apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |