Water purifier water yield detection circuit and water purifier
By setting a water level sensing unit and an induction water detection chip on the outer wall of the water purifier tank, the water level change signal in the water tank is detected and the water volume is calculated, which solves the problem of inaccurate water volume in the existing technology, and realizes the water volume of the water purifier Accurate detection and accurate statistics of water filtered.
Patent Information
- Application Number
- CN202323468547.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-19
AI Technical Summary
When the existing household water purifier calculates the water volume through the flowmeter, the water volume is inaccurate, which affects the statistics of the water filtered by the water purifier.
Design a water purifier water outlet detection circuit, including a water level sensing unit and an induction water detection chip. By detecting the total water level change signal of the water tank, the water purifier water outlet is calculated, and the water level change height, bottom area of the water tank and water density are used. Perform accurate calculations.
Accurate detection of the water outlet of the water purifier is achieved, ensuring the accuracy of the detection of the filtered water volume.
Smart Images
Figure CN222144258U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure belong to the technical field of household appliances, and specifically relate to a water output detection circuit for a water purifier and a water purifier. Background Art
[0002] Most of the current household water purifiers use flow meters to calculate the water output. The water in the water tank is pumped into the water inlet of the flow meter through a water pump, and then the water is discharged from the water outlet. One pin of the flow meter outputs a square wave, and the water output is determined based on the number of square waves corresponding to the specification. The water output obtained is inaccurate, which affects the statistics of the water filtered by the water purifier. Utility Model Content
[0003] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a water output detection circuit for a water purifier and a water purifier.
[0004] In a first aspect, an embodiment of the present disclosure provides a water output detection circuit for a water purifier, the water output detection circuit for the water purifier comprising:
[0005] A water level sensing unit, the water level sensing unit is arranged on the outer wall of the water tank of the water purifier, and the water level sensing unit is used to detect the total water level change signal of the water tank of the water purifier;
[0006] An inductive water detection chip, wherein the inductive water detection chip is electrically connected to the water level sensing unit, and the inductive water detection chip is used to obtain the water output of the water purifier according to the total water level change signal.
[0007] In some embodiments of the present disclosure, the water level change signal is a water level change capacitance signal; the water sensing chip is further used for:
[0008] The change height of the water level is calculated according to the total water level change capacitance signal and the unit water level change capacitance signal;
[0009] The water output of the water purifier is calculated based on the change in the water level.
[0010] In some embodiments of the present disclosure, the water sensing chip is further used for:
[0011] The water output of the water purifier is calculated based on the change in the water level, the bottom area of the water tank and the density of the water.
[0012] In some embodiments of the present disclosure, the water level sensing unit is further configured to: output a first water level capacitance signal and a second water level capacitance signal respectively when the water level is at a first position and a second position of the water level sensing unit;
[0013] The water sensing chip is further specifically used to calculate the unit water level change capacitance signal according to the first water level capacitance signal, the second water level capacitance signal and the height difference between the first position and the second position.
[0014] In some embodiments of the present disclosure, the water purifier water output detection circuit further includes:
[0015] A first capacitor, wherein a first end of the first capacitor is electrically connected to the output end of the water sensing chip, and a second end of the first capacitor is electrically connected to the ground end.
[0016] In some embodiments of the present disclosure, the water purifier water output detection circuit further includes:
[0017] A second capacitor, wherein a first end of the second capacitor is electrically connected to the power supply end, and a second end of the second capacitor is electrically connected to the ground end;
[0018] A third capacitor, wherein a first end of the third capacitor is electrically connected to the power supply end, a second end of the third capacitor is electrically connected to the ground end, and a capacitance value of the second capacitor is different from a capacitance value of the third capacitor.
[0019] In some disclosed embodiments, the capacitance value of the second capacitor is 0.1uF / 50V, and the capacitance value of the third capacitor is 10uF / 25V.
[0020] In some embodiments of the present disclosure, the water purifier water output detection circuit further includes:
[0021] A first resistor, wherein a first end of the first resistor is electrically connected to an input end of the water sensing chip, and a second end of the first resistor is electrically connected to the water level sensing unit.
[0022] In some embodiments of the present disclosure, the water purifier water output detection circuit further includes:
[0023] The third resistor and the fourth resistor, the first end of the third resistor and the first end of the fourth resistor are both electrically connected to the power supply end, and the second end of the third resistor and the second end of the fourth resistor are respectively electrically connected to the input end of the induction water detection chip.
[0024] In a second aspect, an embodiment of the present disclosure further proposes a water purifier, which includes: a water purifier body, a filter element, a water tank, and a water output detection circuit of the water purifier according to any of the above embodiments.
[0025] The water output detection circuit and water purifier of the embodiment of the present disclosure detect the total water level change signal in the water tank through the water level sensing unit arranged on the outer wall of the water tank, and input the total water level change signal into the sensing water detection chip, and the sensing water detection chip calculates the water output of the water purifier according to the total water level change signal. The water output detection circuit of the water purifier of the embodiment of the present disclosure has a simple structure, and can accurately obtain the water output of the water purifier according to the total water level change signal, thereby ensuring the detection accuracy of the water volume filtered by the water purifier. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 The present invention is a circuit diagram for detecting water output of a water purifier according to an embodiment of the present invention;
[0027] Figure 2 It is a partial structural schematic diagram of a water purifier according to an embodiment of the present disclosure. DETAILED DESCRIPTION
[0028] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0029] like Figure 1 and Figure 2 As shown, in the first aspect, the embodiment of the present disclosure provides a water purifier water output detection circuit, the water purifier water output detection circuit comprises: a water level sensing unit U2 and a water sensing detection chip U5. Specifically, as Figure 2 As shown, the water level sensing unit U2 can be arranged on the outer wall 101 of the water tank 10 of the water purifier, and the water level sensing unit U2 is used to detect the total water level change signal of the water tank 10 of the water purifier. The water sensing chip U5 is electrically connected to the water level sensing unit U2, and the water sensing chip U5 is used to calculate the water output of the water purifier according to the total water level change signal.
[0030] According to the water output detection circuit of the water purifier disclosed in the present invention, the water level sensing unit U2 arranged on the outer wall 101 of the water tank 10 is used to detect the total water level change signal in the water tank 10, and the total water level change signal is input into the sensing water detection chip U5, and the sensing water detection chip U5 calculates the water output of the water purifier according to the water level change signal. The detection circuit structure of the embodiment of the present invention is simple, and the water output of the water purifier can be accurately obtained according to the water level change signal, thereby ensuring the detection accuracy of the water volume filtered by the water purifier.
[0031] It should be noted that the total water level change signal of the water tank 10 detected by the water level sensing unit U2 refers to the change value of the water level signal before and after the water level in the water tank 10 changes. Specifically, the water level change signal of the water level sensing unit U2 is a water level change capacitance signal. Specifically, the water level sensing unit U2 may include two pads relatively spaced apart on the side wall of the water tank 10, the two pads are electrically connected to the sensing water detection chip U5, and the water between the two pads and the two pads together form a capacitor plate. When the water level between the two pads changes, the capacitance value of the capacitor plate changes. The two pads of the water level sensing unit U2 and the water form a capacitance change value that is transmitted to the sensing water detection chip U5. The sensing water detection chip U5 can calculate the water output of the water purifier through the capacitance change value.
[0032] In some embodiments of the present disclosure, the water sensing chip U5 is also used for:
[0033] The change height of the water level is calculated based on the total water level change capacitance signal and the unit water level change capacitance signal;
[0034] According to the change in water level, the water output of the water purifier is calculated.
[0035] Specifically, the water sensing chip U5 obtains the water level change height H in the water tank 10 by dividing the total water level change capacitance signal input by the water level sensing unit U2 by the unit water level change capacitance signal. The total water level change capacitance signal is the total water level change capacitance value d, and the unit water level change signal is the unit water level change capacitance value c, which is calculated by the following formula: water level change height H = total water level change capacitance value d / unit water level change capacitance value c.
[0036] In some embodiments of the present disclosure, the water sensing chip U5 is also used for:
[0037] According to the change in water level H, the bottom area S of the water tank and the density ρ of water, the water output m of the water purifier is calculated.
[0038] Specifically, after the water sensing chip U5 obtains the water level change height H, the water sensing chip U5 can obtain the water output m of the water purifier by multiplying the bottom area S of the water tank, the water density ρ and the water level change height H. The calculation formula is: water output m = water level change H*bottom area s of the water tank*water density ρ.
[0039] The bottom area s of the water tank and the density ρ of the water may be manually input into the induction water detection chip U5, or may be written into the induction water detection chip U5 in advance.
[0040] In some embodiments of the present disclosure, the water level sensing unit U2 is further specifically configured to: output a first water level capacitance signal and a second water level capacitance signal respectively when the water level is at a first position and a second position of the water level sensing unit;
[0041] The inductive water detection chip U5 is also specifically used to calculate the unit water level change capacitance signal according to the first water level capacitance signal, the second water level capacitance signal and the height difference between the first position and the second position.
[0042] Specifically, when the water level is at the first position of the water level sensing unit U2, the water level sensing unit U2 inputs the first water level capacitance signal, i.e., the first water level capacitance value a, to the sensing water detection chip U5; when the water level is at the second position of the water level sensing unit U2, the water level sensing unit U2 inputs the second water level capacitance signal, i.e., the second water level capacitance value b, to the sensing water detection chip U5. The sensing water detection chip U5 calculates the capacitance change value ba based on the first water level capacitance value a and the second water level capacitance value b, and the sensing water detection chip U5 calculates the water level height difference BA based on the first position A and the second position B. The sensing water detection chip U5 calculates the unit water level change capacitance signal, i.e., the unit water level change capacitance value, based on the capacitance change value ba and the water level height difference BA. The calculation formula is as follows:
[0043] Capacitance value per unit water level change c = (ba) / (BA).
[0044] It should be noted that the first position A and the second position B can be manually input into the inductive water detection chip U5, or can be detected by other detection equipment electrically connected to the inductive water detection chip U5, and other detection equipment transmits the water level heights of the first position A and the second position B to the inductive water detection chip U5. The above-mentioned process of calculating the unit water level conversion capacitance value is a calibration process or correction process before calculating the water output of the water purifier, that is, firstly, the unit water level change capacitance value c is calculated according to the first position A, the second position B, the first water level capacitance value a and the second water level capacitance value b, and the unit water level change value c is recorded into the inductive water detection chip U5. When the water purifier is in use, the inductive water detection chip U5 calculates the water level change height H of the water tank 10 according to the total water level change capacitance value d input by the water level sensing unit U2 and the unit water level change capacitance value c, and then calculates the water output of the water purifier according to the water level change height H.
[0045] In some embodiments of the present disclosure, Figure 1As shown, the water output detection circuit of the water purifier also includes: a first capacitor C1, a first end of the first capacitor C1 is electrically connected to the output end of the inductive water detection chip U5, and a second end of the first capacitor C1 is electrically connected to the ground terminal GND. The first capacitor C1 can provide a reference capacitor for the inductive water detection chip U5. Specifically, the capacitance value of the first capacitor can be 10nF / 50V, and other capacitance values can also be set as needed.
[0046] In some embodiments of the present disclosure, Figure 1 As shown, the water output detection circuit of the water purifier also includes: a second capacitor C2 and a third capacitor C3, the first end of the second capacitor C2 is electrically connected to the power supply terminal VCC, and the second end of the second capacitor C2 is electrically connected to the ground terminal GND; the first end of the third capacitor C3 is electrically connected to the power supply terminal, and the second end of the third capacitor C3 is electrically connected to the ground terminal, and the capacitance value of the second capacitor C2 is different from the capacitance value of the third capacitor C3. The second capacitor C2 and the third capacitor C3 with different capacitance values can filter signals of different frequencies respectively. Specifically, the capacitor with a large capacitance value filters low-frequency signals, and the capacitor with a small capacitance value filters high-frequency signals.
[0047] In some embodiments of the present disclosure, Figure 1 As shown, the capacitance value of the second capacitor C2 is 0.1uF / 50V, and the capacitance value of the third capacitor C3 is 10uF / 25V. That is, the second capacitor C2 is used to filter high-frequency signals, and the third capacitor C3 is used to filter low-frequency signals. The second capacitor C2 and the third capacitor C3 can also be set to other capacitance values as needed.
[0048] In some embodiments of the present disclosure, Figure 1 As shown, the water output detection circuit of the water purifier also includes: a first resistor R1, the first end of the first resistor R1 is electrically connected to the input end of the inductive water detection chip U5, and the second end of the first resistor R1 is electrically connected to the water level sensing unit U2. That is, the first resistor R1 is electrically connected between the inductive water detection chip U5 and the water level sensing unit U2, and the first resistor R1 plays an anti-interference role. Specifically, the first resistor R1 can be a 0603 chip resistor with a resistance of 1kΩ, and the first resistor R1 can also be a resistor of other forms and other resistance values.
[0049] In some embodiments of the present disclosure, Figure 1As shown, the water output detection circuit of the water purifier also includes: a third resistor R3 and a fourth resistor R4, the first ends of the third resistor R3 and the fourth resistor R4 are both electrically connected to the power supply terminal VCC, and the second ends of the third resistor R3 and the fourth resistor R4 are respectively electrically connected to the input end of the inductive water detection chip U5. The third resistor R3 and the fourth resistor R4 are respectively connected in parallel at the two ends of the inductive water detection chip U5, and the third resistor R3 and the fourth resistor R4 are pull-up resistors of the inductive water detection chip U5. Specifically, the third resistor R3 can be a 0603 chip resistor, and the third resistor R3 and the fourth resistor R4 are both 10KΩ. The third resistor R3 and the fourth resistor R4 can also be resistors of other forms and other resistance values.
[0050] In some embodiments of the present disclosure, Figure 2 As shown, the inductive water detection chip U5 is arranged in the water purifier, and the inductive water detection chip U5 does not contact with water to ensure the service life of the inductive water detection chip U5. The water level sensing unit U2 is arranged on the outer wall 101 of the water tank 10, and the water level sensing unit U2 is arranged along the height direction of the water tank 10. The water level sensing unit U2 can cover all water levels in the water tank 10 to ensure that the water level sensing unit U2 can detect the water level signal of any water level in the water tank 10. Except for the water level sensing unit U2 and the inductive water detection chip U5, the rest of the water output detection circuit is arranged in the water purifier and does not contact with water to ensure the service life of the water output detection circuit.
[0051] Specifically, Figure 2 As shown, one water level sensing unit U2 can be provided, and one water level sensing unit U2 completely covers the height direction of the water tank 10 to realize the function of detecting the water level signal of different water levels in the water tank 10; two, three, four, five or more water level sensing units U2 can also be provided, and each water level sensing unit U2 completely covers the height of the water tank 10, and each water level sensing unit U2 can accurately output the water level signal. Two or more water level sensing units U2 can ensure the reliability of the water level signal. In addition, when one of the water level sensing units U2 fails, any of the remaining water level sensing units U2 can also accurately output the water level signal. Two or more water level sensing units U2 can improve the reliability of the water level signal output by the water level sensing unit U2. Those skilled in the art can set the number of water level sensing units U2 according to actual needs.
[0052] In some other embodiments of the present disclosure, two or more water level sensing units U2 may be provided, wherein each water level sensing unit U2 does not completely cover the height of the water tank 10, but two or more water level sensing units U2 partially overlap and together form a component covering the height of the water tank 10, such as when the height of the water tank 10 is 1 meter, there are two water level sensing units U2, one of which covers 0 to 50 centimeters of the water tank 10, and the other covers 40 to 100 centimeters of the water tank 10. When there are multiple water level sensing units U2, the embodiments of the present disclosure do not impose specific restrictions on the number of water level sensing units U2 and the height of the water tank 10 covered by each water level sensing unit U2, as long as the water level sensing unit U2 as a whole can completely cover the height of the water tank 10.
[0053] In a second aspect, an embodiment of the present disclosure provides a water purifier, which includes: a water purifier body, a filter element, a water tank 10 and a water output detection circuit of the water purifier according to any of the above embodiments.
[0054] The water purifier disclosed in the present invention includes a water output detection circuit of the water purifier, wherein a water level sensing unit U2 arranged on the outer wall 101 of the water tank 10 is used to detect a total water level change signal in the water tank 10, and the total water level change signal is input into a sensing water detection chip U5, and the sensing water detection chip U5 calculates the water output of the water purifier according to the water level change signal. The detection circuit structure of the disclosed embodiment is simple, and the water output of the water purifier can be accurately obtained according to the water level change signal, thereby ensuring the detection accuracy of the water volume filtered by the water purifier.
[0055] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.
Claims
1. A water purifier water output detection circuit, characterized in that: The water output detection circuit of the water purifier comprises: A water level sensing unit, the water level sensing unit is arranged on the outer wall of the water tank of the water purifier, and the water level sensing unit is used to detect the total water level change signal of the water tank of the water purifier; An inductive water detection chip, wherein the inductive water detection chip is electrically connected to the water level sensing unit, and the inductive water detection chip is used to obtain the water output of the water purifier according to the total water level change signal.
2. The water output detection circuit of the water purifier according to claim 1, characterized in that: The water level change signal is a water level change capacitance signal; the water sensing chip is also used for: The change height of the water level is calculated based on the total water level change capacitance signal and the unit water level change capacitance signal; The water output of the water purifier is calculated based on the change in the water level.
3. The water output detection circuit of the water purifier according to claim 2, characterized in that: The water sensing chip is also specifically used for: The water output of the water purifier is calculated based on the change in the water level, the bottom area of the water tank and the density of the water.
4. The water output detection circuit of the water purifier according to claim 2, characterized in that: The water level sensing unit is further specifically used to: output a first water level capacitance signal and a second water level capacitance signal respectively when the water level is at a first position and a second position of the water level sensing unit; The water sensing chip is further specifically used to calculate the unit water level change capacitance signal according to the first water level capacitance signal, the second water level capacitance signal and the height difference between the first position and the second position.
5. The water output detection circuit of the water purifier according to claim 1, characterized in that: The water purifier water output detection circuit also includes: A first capacitor, wherein a first end of the first capacitor is electrically connected to the output end of the water sensing chip, and a second end of the first capacitor is electrically connected to the ground end.
6. The water output detection circuit of the water purifier according to claim 1, characterized in that: The water purifier water output detection circuit also includes: A second capacitor, wherein a first end of the second capacitor is electrically connected to the power supply end, and a second end of the second capacitor is electrically connected to the ground end; A third capacitor, wherein a first end of the third capacitor is electrically connected to the power supply end, a second end of the third capacitor is electrically connected to the ground end, and a capacitance value of the second capacitor is different from a capacitance value of the third capacitor.
7. The water output detection circuit of the water purifier according to claim 6, characterized in that: The capacitance value of the second capacitor is 0.1uF / 50V, and the capacitance value of the third capacitor is 10uF / 25V.
8. The water output detection circuit of the water purifier according to claim 1, characterized in that: The water purifier water output detection circuit also includes: A first resistor, wherein a first end of the first resistor is electrically connected to an input end of the water sensing chip, and a second end of the first resistor is electrically connected to the water level sensing unit.
9. The water output detection circuit of the water purifier according to claim 1, characterized in that: The water purifier water output detection circuit also includes: The third resistor and the fourth resistor, the first end of the third resistor and the first end of the fourth resistor are both electrically connected to the power supply end, and the second end of the third resistor and the second end of the fourth resistor are respectively electrically connected to the input end of the induction water detection chip.
10. A water purifier, characterized in that: The water purifier comprises: a water purifier body, a filter element, a water tank and a water output detection circuit of the water purifier according to any one of claims 1 to 9.