CN218035232U - Be applied to water machine class water shortage detection circuitry - Google Patents
Be applied to water machine class water shortage detection circuitry Download PDFInfo
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- CN218035232U CN218035232U CN202221573490.0U CN202221573490U CN218035232U CN 218035232 U CN218035232 U CN 218035232U CN 202221573490 U CN202221573490 U CN 202221573490U CN 218035232 U CN218035232 U CN 218035232U
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Abstract
The utility model discloses a be applied to water machine class lack of water detection circuitry, including water pump drive circuit and water pump current detection circuit, water pump current detection circuit is connected with water pump drive circuit electricity, and water pump drive circuit is connected with the water pump electricity, and water pump drive circuit is connected with external power supply electricity. Through being equipped with water pump current detection electric current, through having under the water and the anhydrous condition, the change condition of the electric current that detects carries out the water deficiency and judges, can judge whether there is the water deficiency dry combustion method phenomenon, is convenient for respond in time and takes protective measures. Therefore, the whole circuit does not need to be assembled with a floating ball and a reed switch and a detection circuit of the reed switch, the whole circuit is greatly simplified, and the cost is effectively reduced.
Description
Technical Field
The utility model belongs to a water machine class lacks water detection circuitry, especially relates to a be applied to water machine class and lack water detection circuitry.
Background
Most of the water shortage detection application circuits of the existing water machine products are based on a water ball with a magnet and then a magnetic switch such as a reed switch and the like; when water exists or no water exists, the positions of the water balls are different, so that the states of the magnetic switches are different, and whether water exists or not is determined. However, the whole structure of the structure scheme is complex, and the detection circuit uses more devices, so that the whole scheme is caused, the cost is higher, and the large-area popularization is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a be applied to water machine class lack of water detection circuitry can solve at least one in the above-mentioned problem.
According to the utility model discloses an aspect provides a be applied to water machine class water shortage detection circuitry, including water pump drive circuit and water pump current detection circuitry, water pump current detection circuitry is connected with water pump drive circuit electricity, and water pump drive circuit is connected with the water pump electricity, and water pump drive circuit is connected with external power supply electricity.
The beneficial effects of the utility model are that: through being equipped with water pump current detection electric current, through having under the water and the anhydrous condition, the change condition of the electric current that detects carries out the water deficiency and judges, can judge whether there is the water deficiency dry combustion method phenomenon, is convenient for respond in time and takes protective measures. Therefore, the whole circuit does not need to be assembled with a floating ball and a reed switch and a detection circuit of the reed switch, the whole circuit is greatly simplified, and the cost is effectively reduced.
In some embodiments, the water pump driving circuit comprises a freewheeling diode, a first capacitor, a second resistor, a fourth resistor and a triode, wherein one end of the first capacitor, one end of the freewheeling diode and one end of the water pump are electrically connected with the power supply, the other end of the first capacitor, one end of the freewheeling diode and the other end of the water pump are electrically connected with a collector electrode of the triode, an emitter electrode of the triode is electrically connected with the water pump current detection circuit, one end of the second resistor is electrically connected with a base electrode of the triode, the other end of the second resistor is electrically connected with an external single chip microcomputer, one end of the fourth resistor is electrically connected with the base electrode of the triode, and the other end of the fourth resistor is grounded. From this, through each component among the water pump drive circuit, can be through the high level of external singlechip output for the triode switches on, thereby switches on water pump work, draws water, is convenient for drive water pump.
In some embodiments, the water pump current detection circuit comprises a second capacitor, a first resistor and a third resistor, one end of the second capacitor, one end of the first resistor and one end of the third resistor are electrically connected with the emitter of the triode, the other end of the second capacitor and the other end of the third resistor are grounded, and the other end of the first resistor is electrically connected with the external singlechip. From this, through water pump current detection electric current, connect in series on the return circuit through third resistance, realize the change of water pump load for the current value of third resistance of flowing through changes, thereby judges whether be in the water deficiency state, convenient to use, and the circuit is simple.
In some embodiments, the water pump driving circuit comprises a freewheeling diode, a first capacitor, a second resistor, a fourth resistor and an MOS transistor, wherein one end of the first capacitor, one end of the freewheeling diode and one end of the water pump are electrically connected with a power supply, the other end of the first capacitor, one end of the freewheeling diode and one end of the water pump are electrically connected with a drain electrode of the MOS transistor, a source electrode of the MOS transistor is electrically connected with the water pump current detection circuit, one end of the second resistor is electrically connected with a grid electrode of the MOS transistor, the other end of the second resistor is electrically connected with an external single chip microcomputer, one end of the fourth resistor is electrically connected with the grid electrode of the MOS transistor, and the other end of the fourth resistor is grounded. From this, replace the triode with the MOS pipe, improve the driving force, can drive bigger water pump, satisfy different operation requirements.
In some embodiments, the water pump current detection circuit comprises a second capacitor, a first resistor and a third resistor, one end of the second capacitor, one end of the first resistor and one end of the third resistor are all electrically connected with the source electrode of the MOS tube, the other ends of the second capacitor and the third resistor are all grounded, and the other end of the first resistor is electrically connected with the external single chip microcomputer. From this, through water pump current detection electric current, connect in series on the return circuit through third resistance, realize the change of water pump load for the current value of third resistance of flowing through changes, thereby judges whether be in the state of lacking water, convenient to use, and the circuit is simple.
Drawings
Fig. 1 is a schematic circuit diagram of an embodiment of the water shortage detection circuit applied to water machines of the present invention.
Fig. 2 is a schematic circuit diagram of another embodiment of the water shortage detection circuit for water machines of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The electrical connection referred to hereinafter may be through a wire.
Referring to fig. 1-2, a water shortage detection circuit applied to water machines comprises a water pump driving circuit 1 and a water pump current detection circuit 2, wherein the water pump current detection circuit 2 is electrically connected with the water pump driving circuit 1, the water pump driving circuit 1 is electrically connected with a water pump 3, and the water pump driving circuit 1 is electrically connected with an external power supply. Wherein, the water pump 3 is a direct current drive water pump, and the external power supply is a direct current power supply.
As shown in fig. 1, in an embodiment, the dc water pump driving circuit 1 includes a freewheeling diode D1, a first capacitor C1, a second resistor R2, a fourth resistor R4 and a triode Q1, one end of the first capacitor C1, one end of the freewheeling diode D1 and one end of the water pump 3 are electrically connected to the power supply, the other end of the first capacitor C1, one end of the freewheeling diode D1 and the other end of the water pump 3 are electrically connected to the collector of the triode Q1, the emitter of the triode Q1 is electrically connected to the current detection circuit of the water pump 3, one end of the second resistor R2 is electrically connected to the base of the triode Q1, the other end of the second resistor R2 is electrically connected to one of the pins of the external single chip, one end of the fourth resistor R4 is electrically connected to the base of the triode, and the other end of the fourth resistor R is grounded. When the single chip microcomputer is used, the pin port externally connected with the single chip microcomputer outputs high level, and the pin port of the single chip microcomputer is represented by PUMP in the drawing.
The water pump current detection circuit 2 comprises a second capacitor C2, a first resistor R1 and a third resistor R3, one ends of the second capacitor C2, the first resistor R1 and the third resistor R3 are electrically connected with an emitting electrode of the triode Q1, the other ends of the second capacitor C2 and the third resistor R3 are all grounded, the other end of the first resistor R1 is electrically connected with another pin of the external singlechip, and the pin port of the external singlechip is represented by FULX _ AD in the attached drawing.
In the use process, after the power is switched on, the port PUMP of the singlechip outputs high level, the triode Q1 is conducted, and therefore the water PUMP 3 is switched on to work to PUMP water. Meanwhile, a direct current power supply VCC flows through a load water pump 3, and current flows through a triode Q1 and then flows through a third resistor R3 to GND to form a loop; because the third resistor R3 is connected in series on the loop and forms a voltage circuit with the load water pump to obtain a voltage value, the voltage value is filtered by the second capacitor C2, and the first resistor R1 is connected to the port FULX _ AD of the singlechip in a current limiting way. Because, when being in under the water condition, direct current motor load is great, therefore the driving current of output is great to make the voltage that third resistance R3 partial pressure obtained than when short of water is higher, thereby make AD value (the value of analog quantity number of revolutions volume) that another pin sampling of external singlechip obtained change, whether the basis that whether is in short of water dry combustion method is judged as through this change value, and then judge whether short of water, respond in time, realize the purpose of protection.
Therefore, the water shortage detection circuit applied to the water machine is characterized in that the water pump current detection circuit 2 is connected in series to the loop through the third resistor R3 to realize the change of the load of the water pump, so that the current value flowing through the third resistor is changed, and whether the water pump is in a water shortage state or not is judged; need not extra float switch and relevant hardware to detect whether lack of water, effective reduce cost. Meanwhile, because the number of devices in the whole machine is reduced, a magnetic switch is not needed, the safety and reliability of the whole machine are improved, and the cost is effectively reduced.
As shown in fig. 2, in another embodiment, the dc water pump driving circuit 1 includes a freewheeling diode D1, a first capacitor C1, a second resistor R2, a fourth resistor R4 and an MOS transistor Q2, one end of the first capacitor C1, one end of the freewheeling diode D1 and one end of the water pump 3 are electrically connected to a power supply, the other end of the first capacitor C1, one end of the freewheeling diode D1 and one end of the water pump 3 are electrically connected to a drain of the MOS transistor Q2, a source of the MOS transistor Q2 is electrically connected to the water pump current detection circuit 2, one end of the second resistor R2 is electrically connected to a gate of the MOS transistor Q2, the other end of the second resistor R2 is electrically connected to an external single chip, one end of the fourth resistor R4 is electrically connected to the gate of the MOS transistor Q2, and the other end of the fourth resistor is grounded.
The water pump current detection circuit 2 comprises a second capacitor C2, a first resistor R1 and a third resistor R3, one ends of the second capacitor C2, the first resistor R1 and the third resistor R3 are electrically connected with a source electrode of the MOS tube Q2, the other ends of the second capacitor C2 and the third resistor R3 are grounded, and the other end of the first resistor R1 is electrically connected with an external single chip microcomputer.
This embodiment is the same basically with last embodiment circuit structure and principle, and its difference lies in having replaced triode Q1 with MOS pipe Q2 for the driving force reinforcing can drive more powerful water pump, satisfies different operation requirements.
The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these all fall into the protection scope of the present invention.
Claims (5)
1. The utility model provides a be applied to water machine class lack of water detection circuitry, its characterized in that, includes water pump drive circuit (1) and water pump current detection circuit (2), water pump current detection circuit (2) are connected with water pump drive circuit (1) electricity, water pump drive circuit (1) is connected with water pump (3) electricity, water pump drive circuit (1) is connected with external power supply electricity.
2. The water shortage detection circuit applied to the water machine is characterized in that the water pump driving circuit (1) comprises a freewheeling diode (D1), a first capacitor (C1), a second resistor (R2), a fourth resistor (R4) and a triode (Q1), one end of the first capacitor (C1), one end of the freewheeling diode (D1) and one end of the water pump (3) are electrically connected with a power supply, the other end of the first capacitor (C1), the other end of the first capacitor (D1) and the other end of the first capacitor (R4) are electrically connected with a collector of the triode (Q1), an emitter of the triode (Q1) is electrically connected with the current detection circuit of the water pump (3), one end of the second resistor (R2) is electrically connected with a base of the triode (Q1), the other end of the second resistor (R2) is electrically connected with an external singlechip, one end of the fourth resistor (R4) is electrically connected with the base of the triode, and the other end of the fourth resistor (R4) is grounded.
3. The water shortage detection circuit applied to the water machine is characterized in that the water pump current detection circuit (2) comprises a second capacitor (C2), a first resistor (R1) and a third resistor (R3), one end of the second capacitor (C2), one end of the first resistor (R1) and one end of the third resistor (R3) are electrically connected with an emitting electrode of the triode (Q1), the other end of the second capacitor (C2) and the other end of the third resistor (R3) are grounded, and the other end of the first resistor (R1) is electrically connected with an external singlechip.
4. The water shortage detection circuit applied to the water machine is characterized in that the water pump driving circuit (1) comprises a freewheeling diode (D1), a first capacitor (C1), a second resistor (R2), a fourth resistor (R4) and an MOS (metal oxide semiconductor) tube (Q2), one end of the first capacitor (C1), one end of the freewheeling diode (D1) and one end of the water pump (3) are electrically connected with a power supply, the other end of the first capacitor (C1), the other end of the first capacitor (D1) and the other end of the water pump (3) are electrically connected with a drain electrode of the MOS tube (Q2), a source electrode of the MOS tube (Q2) is electrically connected with the water pump current detection circuit (2), one end of the second resistor (R2) is electrically connected with a grid electrode of the MOS tube (Q2), the other end of the second resistor (R2) is electrically connected with an external singlechip, one end of the fourth resistor (R4) is electrically connected with the grid electrode of the MOS tube (Q2), and the other end of the fourth resistor (R4) is grounded.
5. The water shortage detection circuit applied to the water machine is characterized in that the water pump current detection circuit (2) comprises a second capacitor (C2), a first resistor (R1) and a third resistor (R3), one end of the second capacitor (C2), one end of the first resistor (R1) and one end of the third resistor (R3) are electrically connected with the source electrode of the MOS tube (Q2), the other end of the second capacitor (C2) and the other end of the third resistor (R3) are grounded, and the other end of the first resistor (R1) is electrically connected with an external singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221573490.0U CN218035232U (en) | 2022-06-21 | 2022-06-21 | Be applied to water machine class water shortage detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221573490.0U CN218035232U (en) | 2022-06-21 | 2022-06-21 | Be applied to water machine class water shortage detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218035232U true CN218035232U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221573490.0U Active CN218035232U (en) | 2022-06-21 | 2022-06-21 | Be applied to water machine class water shortage detection circuitry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218035232U (en) |
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2022
- 2022-06-21 CN CN202221573490.0U patent/CN218035232U/en active Active
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