CN211505311U - Water inlet detection circuit and driving circuit of pool sweeper - Google Patents
Water inlet detection circuit and driving circuit of pool sweeper Download PDFInfo
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- CN211505311U CN211505311U CN201921983305.3U CN201921983305U CN211505311U CN 211505311 U CN211505311 U CN 211505311U CN 201921983305 U CN201921983305 U CN 201921983305U CN 211505311 U CN211505311 U CN 211505311U
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Abstract
The utility model provides a detection circuitry that entries of pond sweeper, include: the device comprises a main control chip and a capacity value detection circuit; the capacitance value detection circuit comprises an induction electrode arranged on the pool cleaner, and the induction electrode is connected to the main control chip after forming an RC oscillator through a resistor; the main control chip detects the oscillation frequency of the RC oscillator; when the induction electrode is soaked in water, the capacitance value of the induction electrode is increased, the RC time of the oscillator is changed, and the oscillation frequency is reduced. According to the water inlet detection circuit, when the pool sweeper leaves water, the motor is automatically turned off, and idle dry burning of the pool sweeper is avoided. The utility model also provides a drive circuit of pond sweeper, include as above income water detection circuitry.
Description
Technical Field
The utility model relates to a pool sweeper especially relates to like water detection circuitry and drive circuit of pool sweeper.
Background
The pond is used for alleviating summer heat and is used for enjoying aquatic amusement during the summer, but debris such as piece, leaf, wrapping bag also fall into the pond in very easily, cause the pollution to the pond, especially to some less blades of volume, or some moss, dirt at the bottom of the pond, it is fairly troublesome to handle, and the tradition way is directly to discharge the water of pond, later gets into the pond by the workman and clears up in the middle of, does not only waste the water resource like this, and waste time and energy moreover.
To solve this problem, the prior art provides a pool cleaner, which sucks garbage in a pool into a garbage box of the pool cleaner by generating a negative pressure by rotating a motor. The biggest disadvantage of the pool cleaner is that the motor can be started under any condition, for example, when a user holds the pool cleaner for cleaning, the motor still runs idle and is dried, and thus, the waste of power supply and the loss of the motor are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the main technical problem that a detection circuitry and drive circuit that entries of pond sweeper is provided, when the pond sweeper leaves the boiling water, motor self-closing avoids the dry combustion method of idling of pond sweeper.
In order to solve the technical problem, the utility model provides a detection circuitry that entries of pond sweeper, include: the device comprises a main control chip and a capacity value detection circuit;
the capacitance value detection circuit comprises an induction electrode arranged on the pool cleaner, and the induction electrode is connected to the main control chip after forming an RC oscillator through a resistor; the main control chip detects the oscillation frequency of the RC oscillator;
when the induction electrode is soaked in water, the capacitance value of the induction electrode is increased, the RC time of the oscillator is changed, and the oscillation frequency is reduced.
In a preferred embodiment: the motor driving circuit is also included; when the main control chip detects that the oscillation frequency of the RC oscillator is increased, the main control chip drives the motor driving circuit to close the direct current motor of the pool cleaner.
The utility model also provides a drive circuit of pond sweeper, include as above income water detection circuitry.
In a preferred embodiment: the charging system also comprises a charging power supply, a full-charging and over-charging protection circuit, a charging state indicating circuit, a charging power supply reverse connection prevention protection circuit and a battery over-discharging detection circuit which are matched with the charging power supply.
In a preferred embodiment: the charging and over-charging protection circuit comprises a charging control chip, and the charging control chip detects the current electric quantity of the charging power supply; if the current electric quantity of the charging power supply is lower than the saturated electric quantity, the charging control chip outputs charging current; and if the current electric quantity of the charging power supply reaches the saturated electric quantity, the charging control chip stops outputting the charging current.
In a preferred embodiment: the charging state indicating circuit comprises a red LED indicating lamp, a green LED indicating lamp and a switching tube Q5; the base electrode of the switching tube Q5 is connected to the charging control chip, the collector electrode is connected to the red LED indicator light, and the emitter electrode is connected with the base electrode;
if the current electric quantity of the charging power supply is lower than the saturated electric quantity, the charging control chip drives the switching tube Q5 to be conducted, and the red LED indicator lamp is lightened; and if the current electric quantity of the charging power supply reaches the saturated electric quantity, the charging control chip controls the green LED indicator lamp to be turned on.
In a preferred embodiment: the charging power supply reverse connection prevention protection circuit comprises a switching tube Q2, wherein the grid electrode of the switching tube Q2 is connected to the negative electrode input end, the drain electrode of the switching tube Q2 is connected to the positive electrode input end of the charging power supply, and the source electrode of the switching tube Q2 is connected to the charging control chip;
when the positive input end and the negative input end are reversely connected, the switching tube Q2 is disconnected; when the positive input end and the negative input end are not reversely connected, the switching tube Q2 is conducted.
In a preferred embodiment: the main control chip monitors the voltage of the charging power supply in real time through the battery over-discharge detection circuit, and if the voltage of the charging power supply is lower than a set threshold value, the main control chip outputs a control signal to control the motor driving circuit to close the direct current motor of the pool sweeper.
In a preferred embodiment: the motor driving circuit comprises a switch tube Q1 and a relay RY1, the base electrode of the switch tube Q1 is connected with the output end of the main control chip, the emitting electrode is grounded, and the collector electrode is connected to one end of the coil of the relay RY 1; one end of a normally open contact of the relay RY1 is connected with the positive electrode of the battery, and the other end of the normally open contact of the relay RY1 is connected with a direct current motor of the pool cleaner.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
the utility model provides a water inlet detection circuit of a pool cleaner, which judges whether an induction electrode is arranged in water according to the capacitance change caused by the induction electrode in water; when the water pool sweeper is detected to be placed in water, the direct current motor is driven to work through the motor driving circuit; when the pool sweeper is detected to leave the water, the direct current motor is turned off through the motor driving circuit, so that the direct current motor is prevented from rotating in the air.
Drawings
FIG. 1 is a schematic circuit diagram of a pool sweeper in a preferred embodiment of the present invention;
FIG. 2 is a circuit diagram of a pool sweeper in a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the sensing electrode not being placed in water;
fig. 4 is a schematic view of the sensing electrode being placed in water.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and the detailed description.
Referring to fig. 1-4, a drive circuit for a pool sweeper includes: the charging system comprises a water inlet detection circuit, a charging power supply, a full-charging protection circuit, an overcharge protection circuit, a charging state indication circuit, a reverse-connection prevention protection circuit and a battery overdischarge detection circuit, wherein the full-charging protection circuit and the overcharge protection circuit are matched with the charging power supply.
The water inlet detection circuit comprises a main control chip U1 and a volume value detection circuit; the capacitance value detection circuit comprises an induction electrode DT1 arranged on the pool cleaner, and the induction electrode DT1 forms an RC oscillator through a resistor R5 and is connected to a main control chip U1; the main control chip U1 detects the oscillation frequency of the RC oscillator;
because the dielectric constant of water is larger than that of air, the corresponding capacitance value sensed in water is larger than that in air; therefore, after the induction electrode DT1 is in water, the capacitance value is increased by Cf, the capacitance value increased in water is between 5pF and 15pF, the capacitance increment is the basis for detection, the RC time of the oscillator is changed due to the increase of the capacitance, and the oscillation frequency is reduced;
therefore, when the sensing electrode DT1 is immersed in water, the capacitance value of the sensing electrode DT1 increases, the main control chip U1 detects the RC time change of the oscillator, and the oscillation frequency decreases.
In this embodiment, the apparatus further comprises a motor driving circuit; when the main control chip U1 detects that the oscillation frequency of the RC oscillator becomes large, the main control chip U1 drives the motor driving circuit to close the direct current motor of the pool cleaner, so that the dry rotation in the air is avoided.
In this embodiment, the motor driving circuit includes a switch tube Q1 and a relay RY1, a base of the switch tube Q1 is connected with an output end of a main control chip U1, an emitter is grounded, and a collector is connected to one end of a coil of the relay RY 1; one end of a normally open contact of the relay RY1 is connected with the positive electrode of the battery, and the other end of the normally open contact of the relay RY1 is connected with a direct current motor of the pool cleaner.
In this embodiment, a full charge and over charge protection circuit is provided to avoid damage to the power supply caused by continuous charging after the charging power supply is fully charged, the full charge and over charge protection circuit includes a charge control chip U2, and the charge control chip U2 detects the current electric quantity of the charging power supply; if the current electric quantity of the charging power supply is lower than the saturated electric quantity, the charging control chip U2 outputs a charging signal; if the current electric quantity of the charging power supply reaches the saturated electric quantity, the charging control chip U2 stops outputting the charging signal. This can prevent overcharging of the charging power supply.
In this embodiment, in order to indicate the charging state, the charging state indicating circuit includes a red LED indicator light, a green LED indicator light, and a switching tube Q5; the base electrode of the switching tube Q5 is connected to the charging control chip U2, the collector electrode is connected to the red LED indicator light, and the emitter electrode is connected with the base electrode;
if the current electric quantity of the charging power supply is lower than the saturated electric quantity, the charging control chip U2 drives the switch tube Q5 to be conducted, and the red LED indicator lamp is turned on; if the current electric quantity of the charging power supply reaches the saturated electric quantity, the charging control chip U2 outputs a control signal GREEN, and the control signal GREEN is output to a GREEN LED indicator lamp to be lightened through a thyristor Q4 of the full-charging and over-charging protection circuit.
The charging power supply reverse connection prevention protection circuit comprises a switching tube Q2, wherein the grid electrode of the switching tube Q2 is connected to the negative electrode input end, the drain electrode of the switching tube Q2 is connected to the positive electrode input end of the charging power supply, and the source electrode of the switching tube Q2 is connected to the charging control chip U2;
when the positive input end and the negative input end are reversely connected, the grid voltage of the switching tube Q2 is lower than the drain voltage, the switching tube Q2 is disconnected, and the charging circuit is disconnected and cannot be charged; when the positive input end and the negative input end are not reversely connected, the grid voltage of the switch tube Q2 is higher than the drain voltage, the switch tube Q2 is conducted, and the charging circuit is normally conducted for charging, so that accidents caused by the reverse connection of the positive electrode and the negative electrode can be avoided.
The main control chip U1 monitors the voltage of the charging power supply in real time through the battery over-discharge detection circuit, if the voltage of the charging power supply is lower than a set threshold value, the main control chip U1 outputs a control signal to control the motor driving circuit to close the direct current motor of the pool cleaner, and therefore excessive discharge of the power supply can be avoided.
The above description is only an exemplary embodiment of the present invention, and the scope of the present invention should not be limited accordingly. The equivalent changes and modifications made according to the patent scope and the content of the specification of the present invention should still fall within the scope covered by the present invention.
Claims (9)
1. An inlet detection circuit for a pool sweeper, comprising: the device comprises a main control chip and a capacity value detection circuit;
the capacitance value detection circuit comprises an induction electrode arranged on the pool cleaner, and the induction electrode is connected to the main control chip after forming an RC oscillator through a resistor; the main control chip detects the oscillation frequency of the RC oscillator;
when the induction electrode is soaked in water, the capacitance value of the induction electrode is increased, the RC time of the oscillator is changed, and the oscillation frequency is reduced.
2. The water entry detection circuit for a pool sweeper of claim 1, wherein: the motor driving circuit is also included; when the main control chip detects that the oscillation frequency of the RC oscillator is increased, the main control chip drives the motor driving circuit to close the direct current motor of the pool cleaner.
3. A drive circuit for a pool sweeper, comprising the water ingress detection circuit of claim 2.
4. A drive circuit for a pool sweeper in accordance with claim 3, wherein: the charging system also comprises a charging power supply, a full-charging and over-charging protection circuit, a charging state indicating circuit, a charging power supply reverse connection prevention protection circuit and a battery over-discharging detection circuit which are matched with the charging power supply.
5. The drive circuit for a pool sweeper of claim 4, wherein: the charging and over-charging protection circuit comprises a charging control chip, and the charging control chip detects the current electric quantity of the charging power supply; if the current electric quantity of the charging power supply is lower than the saturated electric quantity, the charging control chip outputs charging current; and if the current electric quantity of the charging power supply reaches the saturated electric quantity, the charging control chip stops outputting the charging current.
6. The drive circuit for a pool sweeper of claim 5, wherein: the charging state indicating circuit comprises a red LED indicating lamp, a green LED indicating lamp and a switching tube Q5; the base electrode of the switching tube Q5 is connected to the charging control chip, the collector electrode is connected to the red LED indicator light, and the emitter electrode is connected with the base electrode;
if the current electric quantity of the current charging power supply is lower than the saturated electric quantity, the charging control chip drives the switch tube Q5 to be conducted, and the red LED indicator lamp is turned on; and if the current electric quantity of the charging power supply reaches the saturated electric quantity, the charging control chip controls the green LED indicator lamp to be turned on.
7. The drive circuit for a pool sweeper of claim 5, wherein: the charging power supply reverse connection prevention protection circuit comprises a switching tube Q2, wherein the grid electrode of the switching tube Q2 is connected to the negative electrode input end, the drain electrode of the switching tube Q2 is connected to the positive electrode input end of the charging power supply, and the source electrode of the switching tube Q2 is connected to the charging control chip;
when the positive input end and the negative input end are reversely connected, the switching tube Q2 is disconnected; when the positive input end and the negative input end are not reversely connected, the switching tube Q2 is conducted.
8. The drive circuit for a pool sweeper of claim 5, wherein: the main control chip monitors the voltage of the charging power supply in real time through the battery over-discharge detection circuit, and if the voltage of the charging power supply is lower than a set threshold value, the main control chip outputs a control signal to control the motor driving circuit to close the direct current motor of the pool sweeper.
9. The drive circuit for a pool cleaner of claim 8, wherein: the motor driving circuit comprises a switch tube Q1 and a relay RY1, the base electrode of the switch tube Q1 is connected with the output end of the main control chip, the emitting electrode is grounded, and the collector electrode is connected to one end of the coil of the relay RY 1; one end of a normally open contact of the relay RY1 is connected with the positive electrode of the battery, and the other end of the normally open contact of the relay RY1 is connected with the positive electrode of the direct current motor of the pool cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921983305.3U CN211505311U (en) | 2019-11-15 | 2019-11-15 | Water inlet detection circuit and driving circuit of pool sweeper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921983305.3U CN211505311U (en) | 2019-11-15 | 2019-11-15 | Water inlet detection circuit and driving circuit of pool sweeper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211505311U true CN211505311U (en) | 2020-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921983305.3U Active CN211505311U (en) | 2019-11-15 | 2019-11-15 | Water inlet detection circuit and driving circuit of pool sweeper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211505311U (en) |
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2019
- 2019-11-15 CN CN201921983305.3U patent/CN211505311U/en active Active
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