CN213245541U - Pneumatic pump half-wave rectifying circuit, circuit board and electric pneumatic pump - Google Patents
Pneumatic pump half-wave rectifying circuit, circuit board and electric pneumatic pump Download PDFInfo
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- CN213245541U CN213245541U CN202021552256.0U CN202021552256U CN213245541U CN 213245541 U CN213245541 U CN 213245541U CN 202021552256 U CN202021552256 U CN 202021552256U CN 213245541 U CN213245541 U CN 213245541U
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Abstract
The utility model discloses a pneumatic pump half-wave rectifier circuit, circuit board and electronic pneumatic pump, rectifier diode D, resistance R1 and direct current motor M including series connection, half-wave rectifier circuit remove direct current motor M and all assemble on the circuit board, circuit board fixed connection direct current motor M, and circuit board and direct current motor M locate the installation on the electronic pneumatic pump casing. Compared with the prior art, the utility model has the advantages that the rectifier diode D is used for converting alternating current into direct current, and the filter capacitor C is connected in parallel on the direct current motor M and is used for filtering harmonic waves to protect the direct current motor M to work stably; the circuit is connected with high-temperature protection components in series, the circuit is disconnected when the temperature is too high, the low-temperature automatic closing is realized, the burning out of the direct current motor M is avoided, and the service life of the electric pneumatic pump is prolonged.
Description
Technical Field
The utility model relates to a domestic appliance field relates to the pneumatic pump, especially relates to pneumatic pump half-wave rectifier circuit, circuit board and electronic pneumatic pump.
Background
The pneumatic pump is an inflation or air extraction device, and is driven by a direct current motor or an alternating current motor, and the direct current motor can be more exquisite.
The existing structure is that an alternating current series motor is directly adopted for driving, or alternating current is adopted for voltage transformation and rectification through an external power adapter and is switched on a machine body to be changed into direct current so as to provide electric energy for a direct current motor.
The existing transformation adopts a structure designed on a power line, for example, a plug is an AC-DC transformer, or a built-in circuit board is designed in a machine body and rectified by complex electronic components.
CN210898967U patent provides an electric pneumatic pump which uses a full bridge rectifier stack for ac to dc operation.
Another electric pneumatic pump which works by using a rectifier diode for alternating current and direct current and has high temperature and voltage reduction protection is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a take pneumatic pump half-wave rectifier circuit, circuit board and electronic pneumatic pump of rectifier diode alternating current direct current work, high temperature and step-down protection is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: the half-wave rectifying circuit of the pneumatic pump is characterized in that the half-wave rectifying circuit is connected with alternating current and comprises a rectifying diode D or a plurality of rectifying diodes D which are connected in series in the same direction in a basic working circuit, a resistor R1 which is connected in series with the rectifying diode D for voltage division, and a direct current motor M which is connected in series with a resistor R1.
Further, a filter capacitor C for filtering harmonic waves is connected in parallel to the dc motor M.
Further, a shunt resistor R2 is connected in parallel to the dc motor M.
Further, the filter capacitor C and the resistor R2 are connected in parallel.
The rectification step-down circuit of the pneumatic pump is characterized in that a half-wave rectification circuit is connected with alternating current and comprises a rectification diode D connected with a live wire or a plurality of rectification diodes D connected in series in the same direction, the rectification diodes D are connected in series on a BUCK circuit used for step-down, the cathode of each rectification diode D is connected with the collector of the triode of the BUCK circuit, the BUCK circuit and a zero line form a loop, the base of the triode is connected into the loop, and a direct current motor M is connected in parallel on a filter capacitor C of the BUCK circuit.
Further, the BUCK circuit comprises the triode, and a diode D2, an inductor L and a filter capacitor C which are connected in series, wherein a cathode of the diode D2 is connected with the inductor L, an emitter of the triode is connected to a node where the diode D2 is connected with the inductor L, and a resistor R1 for voltage division is connected in series to a connection node between the triode and the rectifier diode D.
Further, a resistor R2 for shunting is connected in parallel to two ends of the dc motor M.
Furthermore, a high-temperature disconnection component is connected in series on the half-wave rectification circuit and comprises a normally-closed temperature control switch which is automatically disconnected at high temperature and automatically closed at low temperature.
The pneumatic pump circuit board is characterized in that the pneumatic pump half-wave rectifying circuit or the pneumatic pump rectifying and voltage reducing circuit except the direct current motor M is integrated on the circuit board, the circuit board is fixed on a conductive metal pin of a shell of the direct current motor M, and the circuit board and the direct current motor M are fixed on a shell of the electric pneumatic pump.
The electric pneumatic pump is characterized by comprising the pneumatic pump half-wave rectifying circuit or the pneumatic pump rectifying and voltage-reducing circuit.
Compared with the prior art, the utility model has the advantages that the rectifier diode D is used for converting alternating current into direct current, and the filter capacitor C is connected in parallel on the direct current motor M and is used for filtering harmonic waves to protect the direct current motor M to work stably; the circuit is connected with high-temperature protection components in series, the circuit is disconnected when the temperature is too high, the low-temperature automatic closing is realized, the burning out of the direct current motor M is avoided, and the service life of the electric pneumatic pump is prolonged.
Drawings
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention, and further that, unless otherwise indicated, the drawings are only schematic in conceptually illustrating the composition or construction of the objects described and may contain exaggerated displays, and that the drawings are not necessarily drawn to scale.
FIG. 1 is a basic operating circuit without filtering for half-wave rectification;
FIG. 2 is a schematic diagram of a half-wave rectified band-pass filter;
FIG. 3 is a schematic diagram of a half-wave rectification working circuit with filtering and high temperature protection;
FIG. 4 is a schematic diagram showing the variation of the voltage of the filtering DC motor M in the half-wave rectification circuit;
FIG. 5 is a schematic diagram of an operating circuit of the rectifying and voltage-reducing circuit;
fig. 6 is a schematic diagram of the voltage variation of the dc motor M in the rectified step-down circuit.
In the figure: 6. and (4) disconnecting the component 7, the switch 8 and the triode at high temperature.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and those skilled in the art will appreciate that these descriptions are illustrative only, exemplary and should not be construed as limiting the scope of the present invention.
It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
The electric pneumatic pump is an inflation or air extraction device, is driven by a direct current motor or an alternating current motor, and can be more exquisite by the direct current motor.
The existing structure is that an alternating current series motor is directly adopted for driving, or alternating current is adopted for voltage transformation and rectification through an external power adapter and is switched on a machine body to be changed into direct current so as to provide electric energy for a direct current motor.
The existing transformation adopts a structure designed on a power line, for example, a plug is an AC-DC transformer, or a built-in circuit board is designed in a machine body and rectified by complex electronic components.
The present embodiment mainly explains a half-wave rectifier circuit, a circuit board and an electric pneumatic pump of a pneumatic pump with rectifier diodes working in ac-dc and high temperature and step-down protection, and the details are as follows:
in the first embodiment, the pneumatic pump half-wave rectification circuit.
As shown in fig. 1 to 3, the half-wave rectifier circuit includes a rectifier diode D or a plurality of rectifier diodes D connected in series in the same direction in the basic circuit, a resistor R1 divided in series with the rectifier diode D, and a dc motor M connected in series with a resistor R1.
Two ends of the half-wave rectifying circuit are respectively connected to the plug connecting wires of the electric pneumatic pump, the plug of the electric pneumatic pump is connected with household 220V commercial power, namely the half-wave rectifying circuit is connected with a commercial power circuit, and two ends of the half-wave rectifying circuit are connected with a live wire L end and a zero line N end of the commercial power.
Preferably, a switch 7 for controlling the working circuit to work is connected in series on the half-wave rectification circuit, a resistor R1 in the half-wave rectification circuit performs a voltage division function, and the voltage and the current are controlled within a range suitable for the working of the direct current motor M, and preferably, the driving voltage of the direct current motor M is 20-110V.
Because the commercial power is 220V single-phase alternating current, and the current of single alternating current has the characteristic that flows from the L end of the live wire to the N end of the zero line, the direct current formed after the alternating current is rectified by the rectifier diode D is pulse direct current, the waveform is impure, the working state of the motor is easy to be unstable, and the motor is easily burnt out.
Preferably, a filter capacitor C is connected in parallel to the dc motor M of the operating circuit, and the filter capacitor C is used for filtering impure harmonic waves in waveform formed after rectification by the rectifier diode D, so that the voltage output to the dc motor M tends to be stable, the stability of the operating state of the dc motor M is improved, and the service life of the dc motor M is prolonged.
As shown in fig. 4, the alternating current in the half-wave rectification circuit is rectified by the rectifier diode D, and is not filtered by the filter capacitor C, the voltage transmitted to the direct current motor M only has the variable voltage of the positive period of the alternating current, after being filtered by the filter capacitor C, the filter capacitor C is used as a power supply for short time when the alternating current is transmitted to the circuit in the negative period and no current is transmitted to the circuit, and the voltage is provided to the direct current motor M to drive the direct current motor M to work when the alternating current is in the negative period.
In order to stabilize the voltage of the direct current motor M during operation, a resistor R2 may be connected in parallel to the direct current motor M, and the resistor R2 performs a shunt voltage regulation function to shunt current to the direct current motor M, adjust the voltage stability of the direct current motor M, and improve the stability of the direct current motor M during operation, preferably, the filter capacitor C is connected in parallel to the resistor R2.
In the second embodiment, the pneumatic pump rectifies the voltage reduction circuit.
As shown in fig. 5, the pneumatic pump half-wave rectification step-down circuit comprises a rectifier diode D connected to an ac live wire end or a plurality of rectifier diodes D connected in series in the same direction, the rectifier diode D is connected in series to a BUCK circuit for step-down, the rectifier diode D is connected to a triode 8 arranged in the BUCK circuit, the cathode of the rectifier diode D is connected to the collector of the triode 8, the BUCK circuit and a zero line form a loop, the base of the triode 8 is connected to the loop, and a dc motor M is connected in parallel to the BUCK circuit.
Preferably, the rectifier diode D half-wave rectifies the alternating current.
The BUCK circuit comprises a triode 8, an inductor L and a filter capacitor C which are connected in series, the triode 8 is connected with a diode D2 and the inductor L, the cathode of a diode D2 is connected with the inductor L, the emitting electrode of the triode 8 is connected to the node where the diode D2 is connected with the inductor L, and a resistor R1 for voltage division is connected in series to the connection node between the triode 8 and a rectifier diode D.
Preferably, the circuit is connected with a control circuit board, the control circuit board controls the direction of current in the triode 8, and the triode 8 adopts an NPN type triode 8.
Preferably, the triode 8 can be replaced by an IC switch 7, the IC switch 7 is provided with two closing points, one closing point is connected with the BUCK circuit, the other closing point is connected with the zero line to form a loop, and the control circuit board controls the IC switch 7 to select the closing point to be connected in a closing mode.
The direct current motor M is connected in parallel to a filter capacitor C of the BUCK circuit, and a resistor R2 for shunting is connected in parallel to the direct current motor M.
The two ends of the rectification voltage reduction circuit are respectively connected to the plug connecting wires of the electric pneumatic pump, the plug of the electric pneumatic pump is connected with household 220V commercial power, namely, the half-wave rectification circuit is connected with the commercial power circuit, and the two ends of the half-wave rectification circuit are connected with the live wire L end and the zero line N end of the commercial power.
A switch 7 for controlling the working circuit to work is connected in series on the half-wave rectification circuit.
Because of triode 8 can realize the half-wave rectification of circuit in the BUCK circuit equally, nevertheless in order to avoid the base of triode 8 to connect the alternating current and form the return circuit and lead to resistance R1 transshipping and cause the damage, the rectifier diode D who connects in resistance R1 and alternating current live wire end has the effect of step-down and protection resistance R1, and rectifier diode D and resistance R1 do the partial pressure effect, control the range that is fit for direct current motor M work to voltage current, it is preferred, direct current motor M's driving voltage is 20~ 110V.
And a large amount of heat can be generated by resistance voltage division, and the BUCK circuit is used for reducing the voltage, so that the heating is reduced.
Because the commercial power is 220V single-phase alternating current, and the current of single alternating current has the characteristic that flows from the L end of the live wire to the N end of the zero line, the direct current formed after the alternating current is rectified by the rectifier diode D is pulse direct current, the waveform is impure, the working state of the motor is easy to be unstable, and the motor is easily burnt out.
As shown in fig. 6, the pneumatic pump rectification step-down circuit is powered on, the alternating current is rectified by the rectifier diode D or the triode 8, and the voltage transmitted to the direct current motor M only has the variable voltage of the positive period of the alternating current, which is the waveform segment of the solid line; when the alternating current is in a negative period, the wave form section of the dotted line changes for the working voltage provided by the BUCK circuit, the BUCK circuit provides the working voltage for the direct current motor M, the direct current motor M is connected in parallel to the filter capacitor C of the BUCK circuit, and the filter capacitor C performs filter processing on the changed voltage, so that the working voltage on the direct current motor M tends to be stable.
Because the direct current motor M needs to run for a long time when the air pressure pump works, but the direct current motor M can cause the temperature to rise when running at rated current for a long time, in order to avoid the direct current motor M from burning out because of the high temperature, influencing the use of the air pressure pump, the high temperature that has the high temperature to cut off the working circuit cuts off the components and parts 6 is connected in series on the working circuit.
Preferably, the high-temperature disconnection component 6 comprises a normally-closed temperature control switch 7 which is automatically disconnected at high temperature and automatically closed at low temperature, and the normally-closed temperature control switch 7 can be a KSD9700 thermal protector with the operating temperature lower than 80 ℃ and the reset temperature of about 40 ℃.
In order to prevent the high-temperature cut-off component 6 from being directly connected with the direct current with impure waveform, the high-temperature cut-off component 6 can be connected in series between the direct current motor M connected with the filter capacitor C in parallel and the end N of the zero line.
The half-wave rectifying circuit of the first embodiment or the pneumatic pump rectifying and voltage-reducing circuit of the second embodiment can be integrated on a circuit board except for the direct current motor M, the circuit board is fixed on a conductive metal pin of a shell of the direct current motor M, and the direct current motors M of the circuit board are fixedly arranged on a shell of the electric pneumatic pump.
Preferably, the half-wave rectifying circuit of the first embodiment or the pneumatic pump rectifying and voltage-reducing circuit of the second embodiment is applied to the electric pneumatic pump, so that the working stability of the dc motor M in the electric pneumatic pump is improved, and the service life of the electric pneumatic pump is prolonged.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It is right above the utility model provides a pneumatic pump half-wave rectifier circuit, circuit board and electronic pneumatic pump have carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the explanation of above embodiment is only used for helping to understand the utility model discloses and core thought, it should point out, to the ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also be right the utility model discloses carry out a plurality of improvements and embellishment, these are improved and are embellished and also fall into the protection scope of the utility model claims.
Claims (6)
1. The half-wave rectifying circuit of the pneumatic pump is characterized in that the half-wave rectifying circuit is connected with alternating current and comprises a rectifying diode D or a plurality of rectifying diodes D which are connected in series in the same direction in a basic working circuit, a resistor R1 which is connected in series with the rectifying diode D for voltage division, and a direct current motor M which is connected in series with a resistor R1.
2. The half-wave rectification circuit of the pneumatic pump according to claim 1, wherein a filter capacitor C for filtering harmonic waves is connected in parallel to the dc motor M.
3. The half-wave rectification circuit of the pneumatic pump according to claim 2, wherein a shunt resistor R2 is connected in parallel to the dc motor M.
4. The half-wave rectifier circuit for pneumatic pump according to claim 3, wherein said filter capacitor C and said resistor R2 are connected in parallel.
5. The pneumatic pump circuit board is characterized in that the pneumatic pump half-wave rectification circuit except the direct current motor M according to any one of claims 1 to 4 is integrated on the circuit board, the circuit board is fixed on a conductive metal pin of a shell of the direct current motor M, and the circuit board and the direct current motor M are fixed on a shell of the electric pneumatic pump.
6. An electric pneumatic pump comprising the half-wave rectifier circuit for a pneumatic pump according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021552256.0U CN213245541U (en) | 2020-07-30 | 2020-07-30 | Pneumatic pump half-wave rectifying circuit, circuit board and electric pneumatic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021552256.0U CN213245541U (en) | 2020-07-30 | 2020-07-30 | Pneumatic pump half-wave rectifying circuit, circuit board and electric pneumatic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213245541U true CN213245541U (en) | 2021-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021552256.0U Active CN213245541U (en) | 2020-07-30 | 2020-07-30 | Pneumatic pump half-wave rectifying circuit, circuit board and electric pneumatic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213245541U (en) |
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- 2020-07-30 CN CN202021552256.0U patent/CN213245541U/en active Active
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