CN211119833U - Spring water detection circuit for humidifier - Google Patents
Spring water detection circuit for humidifier Download PDFInfo
- Publication number
- CN211119833U CN211119833U CN201922115997.6U CN201922115997U CN211119833U CN 211119833 U CN211119833 U CN 211119833U CN 201922115997 U CN201922115997 U CN 201922115997U CN 211119833 U CN211119833 U CN 211119833U
- Authority
- CN
- China
- Prior art keywords
- spring
- humidifier
- water
- water tank
- circuit module
- 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.)
- Active
Links
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the utility model discloses water circuit is examined to spring for humidifier is applied to in the humidifier and installs on humidifier water tank outer wall, and the capacitance value increase's that detects on the response spring T when utilizing the humidifier water tank to have water method realizes examining the water function, has long service life and simple to operate's advantage. The utility model discloses a: the circuit comprises a spring circuit module, a reference circuit module and a single chip microcomputer; the spring circuit module comprises an induction spring, a first resistor and the single chip microcomputer which are sequentially connected, wherein one end of the induction spring is connected with the first resistor, the other end of the induction spring is abutted against the outer wall of the humidifier water tank, and the position of one end, in contact with the humidifier water tank, of the induction spring is the water level detection position of the humidifier water tank; the reference circuit module comprises a PCB (printed circuit board) pad point, a second resistor and a single chip microcomputer which are sequentially connected, and the capacitance value of the PCB pad point is smaller than that of an induction spring when the humidifier water tank is empty; the singlechip is used for detecting capacitance values of the induction spring and the PCB pad point.
Description
Technical Field
The embodiment of the utility model provides a water circuit is examined to spring for humidifier relates to the electronic circuit field, concretely relates to.
Background
The humidifier is a household appliance for increasing space humidity, and comprises an ultrasonic humidifier, an electric heating humidifier, a pure humidifier and the like.
An ultrasonic humidifier among the prior art uses the tongue tube to detect the storage water tank and whether has water, and when the water tank had water, the floater that sets up in the storage water tank and built-in magnet will float, when floating near the tongue tube position, the actuation of tongue tube switch, just detect water this moment in other words, otherwise the floater just falls dry reed switch and will break off when not having water, detects no water this moment in other words. The humidifier can open the atomization function when water exists, and can close the atomization function when water is short. However, the reed switch is a mechanical switch, the suction times are many, the reed switch can lose efficacy all the time, the atomizer converts water into fog by means of ultrasonic oscillation, the temperature of the ultrasonic vibrator is approximately between 40 and 60 ℃ when water exists, a relatively stable value is kept, however, once the reed switch loses efficacy, no water is still judged to exist by mistake, the atomizer can be dried, the parameters of the ultrasonic vibrator can be changed as long as the atomizer is dried for more than 5 seconds, and the fog amount is reduced when the reed switch is electrified and atomized next time. When the atomizer is continuously dried for a long time, the ultrasonic wave can rapidly generate heat, the temperature can reach more than 100 ℃, the colloid around the atomizer is dissolved, and even the possibility of fire is caused.
There is a need to develop a highly reliable water detection method or structure that can solve the above problems.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a water circuit is examined to spring for humidifier is applied to in the humidifier and installs on humidifier water tank outer wall, and the capacitance value increase's that detects on the response spring T when utilizing the humidifier water tank to have water method realizes examining the water function, has long service life and simple to operate's advantage.
The embodiment of the utility model provides an in a water circuit is examined to spring for humidifier installs on humidifier water tank outer wall, include: the circuit comprises a spring circuit module, a reference circuit module and a single chip microcomputer;
the spring circuit module comprises an induction spring T, a first resistor R1 and the single-chip microcomputer MCU which are sequentially connected, wherein one end of the induction spring T is connected with the first resistor R1, the other end of the induction spring T abuts against the outer wall of the humidifier water tank, and the position of one end, in contact with the humidifier water tank, of the induction spring T is the water level detection position of the humidifier water tank;
the reference circuit module comprises a PCB (printed Circuit Board) pad point H, a second resistor R2 and the single chip microcomputer MCU which are sequentially connected, and the capacitance value of the PCB pad point H is smaller than that of the induction spring T when the humidifier water tank is not filled with water;
and the single chip microcomputer MCU is used for detecting the capacitance values of the induction spring T and the PCB pad point H.
Preferably, the first and second liquid crystal materials are,
the spring water detection circuit for the humidifier further comprises a calibration water detection circuit module;
the calibration water detection circuit module comprises an indication branch and a switch branch;
the indication branch comprises a grounding point GND, a third resistor R3, a light emitting diode L ED and the single chip microcomputer MCU which are connected in sequence;
the switch branch comprises the grounding point GND, a fourth resistor R4, a switch S and the single-chip microcomputer MCU which are connected in sequence.
Preferably, the first and second liquid crystal materials are,
the calibration water detection circuit module, the spring circuit module, the reference circuit module and the single chip microcomputer are arranged on the same PCB.
Preferably, the first and second liquid crystal materials are,
and the calibration water detection circuit module is independently packaged and is connected with the MCU through an interface.
Preferably, the first and second liquid crystal materials are,
and a metal cap covers one end of the induction spring T, which is in contact with the humidifier water tank.
Preferably, the first and second liquid crystal materials are,
the capacitance value of the PCB pad point H is 50% -80% of the capacitance value of the induction spring T when the humidifier water tank is empty.
Preferably, the first and second liquid crystal materials are,
the model of the MCU is 8051 kernel series with analog-digital conversion and capacitive detection.
Preferably, the first and second liquid crystal materials are,
the resistance values of the first resistor R1 and the second resistor R2 are both between 1K omega and 5K omega;
the PCB land points H have a size of between 4.5mm and 6.5 mm.
The utility model provides a water circuit is examined to spring for humidifier installs on humidifier water tank outer wall, include: the circuit comprises a spring circuit module, a reference circuit module and a single chip microcomputer; the spring circuit module comprises an induction spring T, a first resistor R1 and the single-chip microcomputer MCU which are sequentially connected, wherein one end of the induction spring T is connected with the first resistor R1, the other end of the induction spring T abuts against the outer wall of the humidifier water tank, and the position of one end, in contact with the humidifier water tank, of the induction spring T is the water level detection position of the humidifier water tank; the reference circuit module comprises a PCB (printed Circuit Board) pad point H, a second resistor R2 and the single chip microcomputer MCU which are sequentially connected, and the capacitance value of the PCB pad point H is smaller than that of the induction spring T when the humidifier water tank is not filled with water; and the single chip microcomputer MCU is used for detecting the capacitance values of the induction spring T and the PCB pad point H. The embodiment of the utility model provides a water circuit is examined to spring for humidifier is applied to in the humidifier and installs on humidifier water tank outer wall, and the capacitance value increase's that detects on the response spring T when utilizing the humidifier water tank to have water method realizes examining the water function, has long service life and simple to operate's advantage.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a spring water detection circuit for a humidifier according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a spring water detection circuit for a humidifier including a calibration water detection circuit module according to an embodiment of the present invention;
fig. 3 is a schematic view of a three-dimensional structure of a spring water detection circuit for a humidifier, which is mounted on a humidifier base according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structural view of a spring water detection circuit for a humidifier, which is mounted on a humidifier base according to an embodiment of the present invention;
wherein the humidifier base is 001, and the installation is used for the spring of humidifier to examine the cavity of water circuit in humidifier base 001 is 002.
Detailed Description
The embodiment of the utility model provides a water circuit is examined to spring for humidifier is applied to in the humidifier and installs on humidifier water tank outer wall, and the capacitance value increase's that detects on the response spring T when utilizing the humidifier water tank to have water method realizes examining the water function, has long service life and simple to operate's advantage.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 4, in an embodiment of the present invention, a spring water detection circuit for a humidifier is installed on an outer wall of a humidifier water tank, including: the circuit comprises a spring circuit module, a reference circuit module and a single chip microcomputer;
the spring circuit module comprises an induction spring T, a first resistor R1 and the single-chip microcomputer MCU which are sequentially connected, wherein one end of the induction spring T is connected with the first resistor R1, the other end of the induction spring T abuts against the outer wall of the humidifier water tank, and the position of one end, in contact with the humidifier water tank, of the induction spring T is the water level detection position of the humidifier water tank;
the reference circuit module comprises a PCB (printed Circuit Board) pad point H, a second resistor R2 and the single chip microcomputer MCU which are sequentially connected, and the capacitance value of the PCB pad point H is smaller than that of the induction spring T when the humidifier water tank is not filled with water;
and the single chip microcomputer MCU is used for detecting the capacitance values of the induction spring T and the PCB pad point H.
The embodiment of the utility model provides an in, at first must point out, adopt induction spring to examine water and replace traditional tongue tube and examine water, induction spring examines water and has an innate advantage, need not to contact water, only need place the humidifier water tank outside, when humidifier water tank from having water to anhydrous, perhaps from anhydrous to having water time, the capacitance value all changes on the induction spring, utilize the inside timer of singlechip, digital analog converter, can effectively detect the spring and change the capacitance value, and learn from this whether the water tank has water. Specifically, the method comprises the following steps: when the humidifier water tank is empty, the capacitance value of the induction spring T is a reference capacitance value C1When the humidifier water tank has water, a capacitor is formed between the water and the induction spring T and is connected with the induction spring T in parallel, namely the capacitance C of the humidifier water tank when the humidifier water tank has water2Greater than C1And the single chip microcomputer MCU can know whether water exists in the humidifier water tank or not by detecting the capacitance value of the induction spring T. The embodiment of the utility model provides an in, PCB pad point H's effect is as response spring T's reference point, when the humidifier water tank has water, C2Greater than the capacitance of PCB pad point H.
Three points need to be mentioned: 1. no matter the humidifier water tank is added with ordinary unfiltered water or purified water, the capacitance value C of the induction spring T1All canThe change occurs, but when the humidifier water tank is filled with pure water, the capacitance C of the induction spring T1The variation is small; 2. the water level detection position of the humidifier water tank can be changed by adjusting the contact position of the induction spring T and the humidifier water tank, and the common contact position can be arranged at the edge of the bottom of the humidifier water tank and is not limited at the position; 3. the above-mentioned singlechip MCU detects the capacitance value of the sensing spring T specifically may include, send a pulse signal to the input end of the sensing spring T through a timer and a digital-to-analog converter, for example, may send a pulse signal of 400K, when the capacitance value of the sensing spring T is detected to be changed, the integral voltage of the pulse signal will be changed, and the change capacitance value of the sensing spring T can be known through amplification of the operational amplifier.
Preferably, the first and second liquid crystal materials are,
the spring water detection circuit for the humidifier further comprises a calibration water detection circuit module;
the calibration water detection circuit module comprises an indication branch and a switch branch;
the indication branch comprises a grounding point GND, a third resistor R3, a light emitting diode L ED and the single chip microcomputer MCU which are connected in sequence;
the switch branch comprises the grounding point GND, a fourth resistor R4, a switch S and the single-chip microcomputer MCU which are connected in sequence.
The setting of water circuit module is examined in the calibration, is in order to calibrate response spring T, prevents to appear erroneous judgement. When the humidifier water tank is filled with water, the capacitance value of the induction spring T is higher than that of the humidifier water tank in the absence of water, so that misjudgment can be effectively prevented.
Preferably, the first and second liquid crystal materials are,
the calibration water detection circuit module, the spring circuit module, the reference circuit module and the single chip microcomputer are arranged on the same PCB.
Preferably, the first and second liquid crystal materials are,
and the calibration water detection circuit module is independently packaged and is connected with the MCU through an interface.
It is important to explain that, the calibration is examined water circuit module and is can be with spring circuit module, reference circuit module and singlechip encapsulation on same PCB board, also can encapsulate and independent the use alone, it is concrete, examine water circuit manufacture factory to the spring, need not examine water circuit at every spring and all dispose the calibration and examine water circuit module, but when producing the spring and examining water circuit, the independent calibration of direct use is examined water circuit module and is examined water circuit to the spring and carry out the precalibration can, can save the spring and examine the manufacturing cost of water circuit like this.
Preferably, the first and second liquid crystal materials are,
and a metal cap covers one end of the induction spring T, which is in contact with the humidifier water tank.
Preferably, the first and second liquid crystal materials are,
the capacitance value of the PCB pad point H is 50% -80% of the capacitance value of the induction spring T when the humidifier water tank is empty.
Preferably, the first and second liquid crystal materials are,
the type of the single chip Microcomputer (MCU) is 8051 kernel series with analog-digital conversion and capacitance detection.
Preferably, the first and second liquid crystal materials are,
the resistance values of the first resistor R1 and the second resistor R2 are both between 1K omega and 5K omega;
the PCB land points H have a size of between 4.5mm and 6.5 mm.
The utility model provides a water circuit is examined to spring for humidifier installs on humidifier water tank outer wall, include: the circuit comprises a spring circuit module, a reference circuit module and a single chip microcomputer; the spring circuit module comprises an induction spring T, a first resistor R1 and the single-chip microcomputer MCU which are sequentially connected, wherein one end of the induction spring T is connected with the first resistor R1, the other end of the induction spring T abuts against the outer wall of the humidifier water tank, and the position of one end, in contact with the humidifier water tank, of the induction spring T is the water level detection position of the humidifier water tank; the reference circuit module comprises a PCB (printed Circuit Board) pad point H, a second resistor R2 and the single chip microcomputer MCU which are sequentially connected, and the capacitance value of the PCB pad point H is smaller than that of the induction spring T when the humidifier water tank is not filled with water; and the single chip microcomputer MCU is used for detecting the capacitance values of the induction spring T and the PCB pad point H. The embodiment of the utility model provides a water circuit is examined to spring for humidifier is applied to in the humidifier and installs on humidifier water tank outer wall, and the capacitance value increase's that detects on the response spring T when utilizing the humidifier water tank to have water method realizes examining the water function, has long service life and simple to operate's advantage.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a water circuit is examined to spring for humidifier installs on humidifier water tank outer wall, its characterized in that includes: the circuit comprises a spring circuit module, a reference circuit module and a single chip Microcomputer (MCU);
the spring circuit module comprises an induction spring (T), a first resistor (R1) and the single chip Microcomputer (MCU) which are sequentially connected, wherein one end of the induction spring (T) is connected with the first resistor (R1), the other end of the induction spring (T) abuts against the outer wall of the humidifier water tank, and the position of one end, in contact with the humidifier water tank, of the induction spring (T) is the water level detection position of the humidifier water tank;
the reference circuit module comprises a PCB (printed circuit board) pad point (H), a second resistor (R2) and the single chip Microcomputer (MCU) which are sequentially connected, and the capacitance value of the PCB pad point (H) is smaller than that of the induction spring (T) when the humidifier water tank is empty;
and the single chip Microcomputer (MCU) is used for detecting the capacitance values of the induction spring (T) and the PCB pad point (H).
2. The spring water detection circuit for a humidifier according to claim 1, further comprising a calibration water detection circuit module;
the calibration water detection circuit module comprises an indication branch and a switch branch;
the indication branch comprises a grounding point (GND), a third resistor (R3), a light emitting diode (L ED) and the single chip Microcomputer (MCU) which are connected in sequence;
the switch branch comprises the grounding point (GND), a fourth resistor (R4), a switch (S) and the single chip Microcomputer (MCU) which are connected in sequence.
3. The spring water detection circuit for the humidifier according to claim 2, wherein the calibration water detection circuit module, the spring circuit module, the reference circuit module and the single chip microcomputer are mounted on the same PCB.
4. The spring water detection circuit for a humidifier according to claim 2, wherein the calibration water detection circuit module is packaged separately and connected to the single chip Microcomputer (MCU) through an interface.
5. The spring water detection circuit for a humidifier according to any one of claims 1 to 4, wherein one end of the induction spring (T) contacting the humidifier water tank is covered with a metal cap.
6. The spring water detection circuit for a humidifier according to claim 5, wherein the capacitance value of the PCB pad point (H) is 50% to 80% of the capacitance value of the induction spring (T) when the humidifier water tank is empty of water.
7. The spring water detection circuit for the humidifier according to any one of claims 1 to 4, wherein the type of the single chip Microcomputer (MCU) is 8051 kernel series with analog-to-digital conversion and capacitive detection.
8. The spring water detection circuit for the humidifier according to claim 7, wherein the first resistor (R1) and the second resistor (R2) have a resistance value between 1K Ω and 5K Ω;
the dimensions of the PCB land points (H) are between 4.5mm and 6.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922115997.6U CN211119833U (en) | 2019-12-02 | 2019-12-02 | Spring water detection circuit for humidifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922115997.6U CN211119833U (en) | 2019-12-02 | 2019-12-02 | Spring water detection circuit for humidifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211119833U true CN211119833U (en) | 2020-07-28 |
Family
ID=71693776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922115997.6U Active CN211119833U (en) | 2019-12-02 | 2019-12-02 | Spring water detection circuit for humidifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211119833U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397172A (en) * | 2019-12-02 | 2020-07-10 | 佛山市和瑞泰智能科技有限公司 | Spring water detection circuit for humidifier, double-dry-burning protection circuit and working method |
-
2019
- 2019-12-02 CN CN201922115997.6U patent/CN211119833U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397172A (en) * | 2019-12-02 | 2020-07-10 | 佛山市和瑞泰智能科技有限公司 | Spring water detection circuit for humidifier, double-dry-burning protection circuit and working method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2005271971B2 (en) | Proximity sensor for sensing fluid level in a container | |
| US20110027104A1 (en) | Sensor for switching a pump on and/or off | |
| CN211119833U (en) | Spring water detection circuit for humidifier | |
| CN201364192Y (en) | Liquid level sensor | |
| CN111397172B (en) | Spring water detection circuit for humidifier, double-dry-burning protection circuit and working method | |
| US20030126926A1 (en) | Fluid level sensor | |
| CN110558835A (en) | Capacitive liquid level detection structure and electric kettle thereof | |
| CN211119848U (en) | Double-dry-burning protection circuit for humidifier | |
| CN216645511U (en) | Liquid level monitoring device | |
| CN211324365U (en) | Capacitive liquid level detection structure and electric kettle thereof | |
| CN113160504A (en) | Contactless induction doorbell and outdoor flood alarm | |
| CN217058972U (en) | Water level detection mechanism of water storage tank | |
| CN218765490U (en) | High-frequency oscillation self-feedback variable capacitance circuit for liquid level detection and proximity switch | |
| CN211345687U (en) | Embedment ultrasonic atomization head and humidifier of water are examined to area spring | |
| CN215309197U (en) | Injection device | |
| CN217424493U (en) | Liquid level detection circuit and cooking equipment | |
| CN214629848U (en) | Airflow sensor and electronic cigarette | |
| CN218847337U (en) | Capacitance type liquid level switch | |
| CN215809373U (en) | Capacitance type multi-section water level sensing device and electric heating appliance thereof | |
| CN220853776U (en) | Flexible capacitive oil level sensor | |
| KR200348929Y1 (en) | Ringer-bell | |
| CN115183840A (en) | High-frequency oscillation self-feedback variable capacitance circuit for liquid level detection and proximity switch | |
| JP2002340653A (en) | Capacitance type liquid-level sensor | |
| CN115683276A (en) | Capacitance type liquid level switch | |
| CN115692097A (en) | Intelligent electronic liquid level switch and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A spring water detecting circuit for humidifier Effective date of registration: 20201222 Granted publication date: 20200728 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd. Pledgor: Foshan heruitai Intelligent Technology Co.,Ltd. Registration number: Y2020980009758 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |