CN218167936U - Constant-power control circuit and steam cleaning equipment with same - Google Patents
Constant-power control circuit and steam cleaning equipment with same Download PDFInfo
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- CN218167936U CN218167936U CN202221429360.XU CN202221429360U CN218167936U CN 218167936 U CN218167936 U CN 218167936U CN 202221429360 U CN202221429360 U CN 202221429360U CN 218167936 U CN218167936 U CN 218167936U
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Abstract
The utility model relates to a constant power control circuit and have its steam cleaning equipment. The circuit comprises: the voltage detection circuit is electrically connected with a direct current power supply of the steam cleaning equipment and is used for detecting the output voltage of the power supply; the controller is electrically connected with the direct-current power supply and the voltage detection circuit and used for receiving the power supply output voltage and outputting a PWM (pulse width modulation) driving signal according to the power supply output voltage; and the PWM driving circuit is electrically connected with the steam component, the direct-current power supply and the controller of the steam cleaning equipment and used for receiving the PWM driving signal and controlling the constant-power operation of the steam component according to the PWM driving signal. The utility model discloses detecting out power output voltage, the controller is according to this power output voltage that detects to the PWM drive circuit output PWM drive signal that corresponds, and the constant power control of steam subassembly is realized to PWM drive circuit according to PWM drive signal, realizes continuous and stable steam effect, and clean effect of lifting means and user experience feel.
Description
Technical Field
The utility model relates to a cleaning device field, in particular to constant power control circuit and have its steam cleaning device.
Background
Steam is widely applied to daily life due to good cleaning and sterilizing effects, and steam cleaning equipment also enters the lives of people. At present, alternating current is mostly used as a power supply of the steam cleaning equipment, the alternating current needs to be connected to the alternating current through a power line, but the steam cleaning equipment cannot be normally used when the alternating current is inconvenient to connect (for example, when the steam cleaning equipment is used outdoors). Therefore, the application range of the steam cleaning apparatus supplied with ac power is easily limited, and the development of the steam cleaning apparatus supplied with dc power is required.
For dc powered steam cleaning devices, it is necessary to dc power them with a dc power source (e.g., a battery pack). However, when the direct-current power supply supplies power to the steam cleaning equipment, the power of the equipment is reduced along with the reduction of the voltage of the direct-current power supply, the requirement of the steam cleaning equipment on the stability of the power cannot be met, the constant-power operation of the equipment cannot be guaranteed, the steam effect is easy to be poor, and the cleaning effect of the equipment and the user experience feeling are all to be improved.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims to solve the technical problem how when the direct current power supply supplies power to steam cleaning equipment, carry out constant power control to steam cleaning equipment, guarantee steam cleaning equipment constant power operation, realize continuous and stable steam effect, and then ensure that equipment cleaning effect and user experience feel.
In order to solve the technical problem, the utility model provides a constant power control circuit for among the steam cleaning equipment, with steam cleaning equipment's DC power supply and the equal electricity of steam subassembly are connected, steam subassembly with the DC power supply electricity is connected, include:
the voltage detection circuit is electrically connected with the direct current power supply and is used for detecting the output voltage of the power supply;
the controller is electrically connected with the direct current power supply and the voltage detection circuit and used for receiving the power supply output voltage and outputting a PWM (pulse width modulation) driving signal according to the power supply output voltage; and
and the PWM driving circuit is electrically connected with the steam assembly, the direct-current power supply and the controller and used for receiving the PWM driving signal and controlling the steam assembly to run at constant power according to the PWM driving signal under the action of the power supply output voltage.
Optionally, the PWM driving circuit includes an NMOS transistor Q5;
the grid electrode of the NMOS tube Q5 is electrically connected with the controller, the drain electrode of the NMOS tube Q5 is electrically connected with the negative electrode input end of the steam component, and the source electrode of the NMOS tube Q5 is electrically connected with the negative electrode of the direct-current power supply; the positive electrode input end of the steam assembly is electrically connected with the positive electrode of the direct-current power supply, and the common connecting end between the source electrode of the NMOS tube Q5 and the negative electrode of the direct-current power supply is grounded;
and the NMOS tube Q5 is used for generating a PWM duty ratio according to a PWM driving signal and controlling the on-off of the steam assembly according to the PWM duty ratio, so that the effective voltage of the steam assembly in each control period is constant.
Optionally, the PWM driving circuit further includes a switch control sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit, and the switch control sub-circuit is also electrically connected with the steam component and the direct-current power supply;
the switch control sub-circuit is used for controlling the on-off of the NMOS tube Q5 according to the PWM driving signal and transmitting the PWM driving signal to the NMOS tube Q5 when the NMOS tube Q5 is switched on.
Optionally, the switch control sub-circuit includes a first triode Q1, a first resistor R1, and a second resistor R2;
the base electrode of the first triode Q1 is electrically connected with the controller, the collector electrode of the first triode Q1 is electrically connected with the first end of the second resistor R2 through the first resistor R1, the second end of the second resistor R2 is connected to the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct current power supply, and the emitting electrode of the first triode Q1 is grounded; the NMOS tube Q5 is connected to a common connection end between the first end of the first resistor R1 and the first end of the second resistor R2.
Optionally, the PWM driving circuit further includes an MOS transistor driving boosting sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit and the MOS tube driving improving sub-circuit in sequence, and the MOS tube driving improving sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
and the MOS tube driving improving sub-circuit is used for improving the driving voltage of the NMOS tube Q5.
Optionally, the MOS transistor driving boosting sub-circuit includes a second triode Q2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;
a base electrode of the second triode Q2 is connected with the switch control sub-circuit, a collector electrode of the second triode Q2 is grounded through the third resistor R3 and the fourth resistor R4 in sequence, and an emitter electrode of the second triode Q2 is connected to a common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply; the first end of the fifth resistor R5 is connected to the common connection end between the third resistor R3 and the fourth resistor R4, and the second end of the fifth resistor R5 is electrically connected to the NMOS transistor Q5.
Optionally, the PWM driving circuit further includes a MOS transistor push-pull sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit, the MOS tube drive improving sub-circuit and the MOS tube push-pull sub-circuit in sequence, and the MOS tube push-pull sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
and the MOS tube push-pull sub-circuit is used for improving the rapid on-off capacity of the NMOS tube Q5.
Optionally, the MOS push-pull sub-circuit includes a third triode Q3, a fourth triode Q4, and a sixth resistor R6;
the base electrode of the third triode Q3 and the base electrode of the fourth triode Q4 are electrically connected with the MOS tube driving boosting sub-circuit, the collector electrode of the third triode Q3 is connected with the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply, the collector electrode of the fourth triode Q4 is grounded, and the emitter electrode of the third triode Q3 is electrically connected with the emitter electrode of the fourth triode Q4; a first end of the sixth resistor R6 is connected to a common connection end between the emitter of the third triode Q3 and the emitter of the fourth triode Q4, and a second end of the sixth resistor R6 is electrically connected to the NMOS transistor Q5.
Optionally, the voltage detection circuit includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a capacitor C;
the first end of the seventh resistor R7 is electrically connected with the positive pole of the direct-current power supply, the second end of the seventh resistor R7 is grounded through the eighth resistor R8, the first end of the ninth resistor R9 is connected with the common connection end between the second end of the seventh resistor R7 and the eighth resistor R8, the second end of the ninth resistor R9 is electrically connected with the controller, the first end of the capacitor C is connected with the common connection end between the second end of the ninth resistor R9 and the controller, and the second end of the capacitor C is grounded.
Furthermore, the utility model also provides a steam cleaning equipment, include:
an apparatus body;
the direct current power supply is arranged on the equipment body;
the steam assembly is arranged on the equipment body and is electrically connected with the direct-current power supply; and
the constant power control circuit is electrically connected with the direct current power supply and the steam component of the steam cleaning equipment, and is used for controlling the steam component to run at constant power under the power supply of the direct current power supply.
The technical scheme provided by the utility model, following advantage has:
the utility model provides a constant power control circuit and have its steam cleaning equipment, through the voltage detection circuit, detect out the power output voltage for the DC power supply output of steam cleaning equipment power supply, feed back this power output voltage to the controller, the controller can export the PWM drive signal that corresponds to PWM drive circuit according to this power output voltage, PWM drive circuit can maintain the power constancy of the steam subassembly in the steam cleaning equipment according to this PWM drive signal that corresponds, realize constant power control, the constant power operation through steam subassembly, realize continuous and stable steam effect, lifting means clean effect and user experience sense.
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 described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a structural diagram of a constant power control circuit according to a first embodiment of the present invention;
fig. 2 is a specific design diagram of a voltage detection circuit according to an embodiment of the present invention;
fig. 3 is a structural diagram of a PWM driving circuit according to a first embodiment of the present invention;
fig. 4-1 is a schematic diagram of a waveform of the power output voltage varying with time according to the first embodiment of the present invention;
fig. 4-2 is a schematic waveform diagram of a PWM square wave level signal varying with time according to an embodiment of the present invention;
fig. 5 is a structural diagram of another PWM driving circuit according to a first embodiment of the present invention;
fig. 6 is a specific design diagram of another PWM driving circuit according to a first embodiment of the present invention;
fig. 7 is a structural diagram of a steam cleaning device according to a second embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In the present application, where the contrary is not intended, the use of directional terms such as "upper, lower, top, bottom" generally refer to the orientation as shown in the drawings, or to the component itself being oriented in a vertical, perpendicular, or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In the conventional art, when adopting direct current power supply to supply power to steam cleaning equipment, along with direct current power supply's voltage reduction, steam cleaning equipment can reduce thereupon, leads to the steam effect more and more poor, and equipment cleaning effect and user experience feel not good. In order to solve the technical problem, the utility model provides a constant power control circuit and have its steam cleaning equipment.
The utility model provides a constant power control circuit and have its steam cleaning equipment can be applied to on any steam cleaning product that adopts DC power supply, for example steam cleaning equipment such as steam sweeper. In the following embodiments, the present invention is described by taking the application to a steam sweeper as an example.
Example one
As shown in fig. 1, the present embodiment provides a constant power control circuit for use in a steam cleaning device, the constant power control circuit being electrically connected to both a dc power supply and a steam component of the steam cleaning device, the steam component being electrically connected to the dc power supply, the circuit comprising:
the voltage detection circuit is electrically connected with the direct-current power supply and is used for detecting the output voltage of the power supply;
the controller is electrically connected with the direct-current power supply and the voltage detection circuit and used for receiving the power supply output voltage and outputting a PWM (pulse width modulation) driving signal according to the power supply output voltage; and
and the PWM driving circuit is electrically connected with the steam assembly, the direct-current power supply and the controller and used for receiving the PWM driving signal and controlling the constant-power operation of the steam assembly according to the PWM driving signal under the action of the output voltage of the power supply.
The above-mentioned constant power control circuit of this embodiment, through voltage detection circuit, detect out the power output voltage for the direct current power supply output of steam cleaning equipment (for example steam sweeper) power supply, feed back this power output voltage to the controller, the controller can export corresponding PWM drive signal to PWM drive circuit according to this power output voltage, PWM drive circuit can maintain the power of the steam subassembly in the steam cleaning equipment invariable according to this corresponding PWM drive signal, realize constant power control, run through the constant power of steam subassembly, realize continuous and stable steam effect, promote equipment cleaning effect and user experience sense.
Specifically, the controller is specifically a single chip microcomputer, and a single chip microcomputer of an appropriate type can be selected according to actual conditions, for example, a single chip microcomputer of GD32F series is selected for use in this embodiment. The direct current power supply is specifically a battery pack, and the steam assembly specifically comprises a heating wire capable of heating liquid in the steam cleaning equipment.
Preferably, as shown in fig. 2, the voltage detection circuit includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a capacitor C;
the first end of the seventh resistor R7 is electrically connected with the positive electrode of the direct-current power supply, the second end of the seventh resistor R7 is grounded through the eighth resistor R8, the first end of the ninth resistor R9 is connected with the common connection end between the second end of the seventh resistor R7 and the eighth resistor R8, the second end of the ninth resistor R9 is electrically connected with the controller, the first end of the capacitor C is connected with the common connection end between the second end of the ninth resistor R9 and the controller, and the second end of the capacitor C is grounded.
In fig. 2, vbat is a battery pack voltage, and Vbat _ ref is an equivalent voltage transmitted to the controller after the battery pack voltage is divided by the seventh resistor R7 and the eighth resistor R8, that is, a power output voltage of the dc power supply detected by the controller through the power detection circuit; the power supply voltage detection is realized according to the circuit structure, so that the controller can output corresponding PWM driving signals according to the output power supply output voltage, and the power of the steam assembly is controlled to be constant through the PWM driving circuit.
Preferably, as shown in fig. 3, the PWM driving circuit includes an NMOS transistor Q5;
the grid electrode of the NMOS tube Q5 is electrically connected with the controller, the drain electrode of the NMOS tube Q5 is electrically connected with the negative electrode input end of the steam component, and the source electrode of the NMOS tube Q5 is electrically connected with the negative electrode of the direct-current power supply; the positive electrode input end of the steam component is electrically connected with the positive electrode of the direct-current power supply, and the common connecting end between the source electrode of the NMOS tube Q5 and the negative electrode of the direct-current power supply is grounded;
and the NMOS tube Q5 is used for generating a PWM duty ratio according to the PWM driving signal and controlling the on-off of the steam assembly according to the PWM duty ratio, so that the effective voltage of the steam assembly in each control period is constant.
The NMOS transistor Q5 generates a corresponding PWM duty according to the PWM driving signal output by the controller to control on and off of the steam component (i.e., on and off of the steam component) in the steam cleaning device. The PWM driving signal is specifically a PWM square wave level signal, and the PWM duty ratio refers to a ratio of a high level time to a period in the PWM square wave level signal in a control period under Pulse Width Modulation (PWM). In this embodiment, the time of the high level in the PWM square wave level signal corresponds to the on-time of the steam component, and the time of the low level in the PWM square wave level signal corresponds to the off-time of the steam component.
For any control period, the product of the power supply output voltage and the PWM duty ratio is the effective voltage of the steam assembly in the control period; when the output voltage of the power supply is higher, the controller outputs a corresponding PWM driving signal to control the NMOS tube Q5 to generate a smaller PWM duty ratio, and the conduction time of the steam assembly in the control period is controlled according to the smaller PWM duty ratio; when it is powered onWhen the output voltage is lower, the controller outputs a corresponding PWM driving signal to control the PWM driving circuit to generate a larger PWM duty ratio, and controls the conduction time of the steam assembly in the control period according to the larger PWM duty ratio, as shown in FIG. 4-1 and FIG. 4-2; FIG. 4-1 is a waveform diagram of the power supply output voltage with time, in FIG. 4-1, the abscissa is time t and the ordinate is the power supply output voltage u 1 (ii) a FIG. 4-2 is a graph showing the time-varying waveform of the PWM square-wave level signal, where the abscissa is time t and the ordinate is the PWM square-wave level signal u in FIG. 4-2 2 The time of the high level in the PWM square wave level signal (i.e. the on-time of the steam component) is Ton, the time of the low level in the PWM square wave level signal (i.e. the off-time of the steam component) is Toff, and Ton + Toff = T is constant in each control period, where T is the control period. In any one control period T, the PWM duty ratio τ = Ton/T.
Based on the controller and the PWM driving circuit, the product (namely effective voltage) of the power output voltage and the PWM duty ratio of the steam assembly in each control period can be ensured to be constant, and the power on the steam assembly is further constant due to the constant current on the steam assembly, so that the constant power operation of the steam assembly is realized.
Preferably, as shown in fig. 5, the PWM driving circuit further includes a switching control sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through a switch control sub-circuit, and the switch control sub-circuit is also electrically connected with the steam component and the direct-current power supply;
and the switch control sub-circuit is used for controlling the on-off of the NMOS tube Q5 according to the PWM driving signal and transmitting the PWM driving signal to the NMOS tube Q5 when the NMOS tube Q5 is switched on.
A switch control sub-circuit is added at the front stage of the NMOS tube Q5, so that the on-off of the NMOS tube Q5 can be controlled, the switch control of the whole PWM driving circuit is realized, and the protection effect of the PWM driving circuit can be achieved.
Specifically, as shown in fig. 6, the switch control sub-circuit includes a first transistor Q1, a first resistor R1, and a second resistor R2;
the base electrode of the first triode Q1 is electrically connected with the controller, the collector electrode of the first triode Q1 is electrically connected with the first end of the second resistor R2 through the first resistor R1, the second end of the second resistor R2 is connected with the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply, and the emitting electrode of the first triode Q1 is grounded; the NMOS transistor Q5 is connected to a common connection terminal between the first terminals of the first and second resistors R1 and R2.
When the triode Q1 works in a saturation region, the emitter and the collector of the triode are conducted, and the NMOS tube Q5 of the later stage is also conducted; when the triode Q1 works in a cut-off region, the emitting electrode and the collecting electrode of the triode are disconnected, and the NMOS tube Q5 of the later stage is also disconnected; the NMOS tube Q5 is respectively switched on and off by utilizing the saturation and cut-off of the triode Q1, and further the on-off control of the whole PWM driving circuit is realized. In this embodiment, the first transistor Q1 is specifically an NPN transistor.
Preferably, as shown in fig. 5, the PWM driving circuit further includes a MOS transistor driving boosting sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit and the MOS tube driving improving sub-circuit in sequence, and the MOS tube driving improving sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
and the MOS tube driving boosting sub-circuit is used for boosting the driving voltage of the NMOS tube Q5.
The MOS tube driving improvement sub-circuit is added between the switch control sub-circuit and the NMOS tube Q5, so that when the NMOS tube Q5 is controlled to be switched on, the driving voltage of the NMOS tube Q5 is improved, and the driving capability of the NMOS tube Q5 is further improved conveniently.
Specifically, as shown in fig. 6, the MOS transistor driving boosting sub-circuit includes a second transistor Q2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;
a base electrode of a second triode Q2 is connected with the switch control sub-circuit, a collector electrode of the second triode Q2 is sequentially grounded through a third resistor R3 and a fourth resistor R4, and an emitting electrode of the second triode Q2 is connected to a common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply; a first end of the fifth resistor R5 is connected to the common connection end between the third resistor R3 and the fourth resistor R4, and a second end of the fifth resistor R5 is electrically connected to the NMOS transistor Q5.
By using the second triode Q2, the third resistor R3 and the fourth resistor R4, the driving voltage on the NMOS tube Q5 is increased to the divided voltage of the direct-current power supply voltage on R3 and R4, and the driving voltage of the NMOS tube Q5 is increased.
Preferably, as shown in fig. 5, the PWM driving circuit further includes a MOS transistor push-pull sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit, the MOS tube drive improving sub-circuit and the MOS tube push-pull sub-circuit in sequence, and the MOS tube push-pull sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
and the MOS tube push-pull sub-circuit is used for improving the rapid on-off capacity of the NMOS tube Q5.
The MOS tube push-pull sub-circuit adopts two power tubes (such as a triode and an MOS tube) with the same parameters, the power tubes exist in the circuit in a push-pull mode, the power tubes are respectively responsible for positive and negative half-cycle waveform amplification tasks, and when the circuit works, only one power tube is conducted every time, so that the switching speed can be improved. This embodiment adds MOS pipe again between MOS pipe drive improves sub-circuit and NMOS pipe Q5 and pushes away sub-circuit, can strengthen NMOS pipe Q5's quick break-make ability based on the push-pull effect that MOS pipe pushed away sub-circuit, and then improves the switching performance of NMOS pipe, is favorable to strengthening NMOS pipe Q5 and controls the precision that switches on and turn-off of steam subassembly, reduces the time delay, and then helps promoting the constant power control precision.
Specifically, as shown in fig. 6, the MOS transistor push-pull sub-circuit includes a third transistor Q3, a fourth transistor Q4, and a sixth resistor R6;
the base electrode of the third triode Q3 and the base electrode of the fourth triode Q4 are electrically connected with the MOS tube driving booster sub-circuit, the collector electrode of the third triode Q3 is connected with the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct current power supply, the collector electrode of the fourth triode Q4 is grounded, and the emitter electrode of the third triode Q3 is electrically connected with the emitter electrode of the fourth triode Q4; a first end of the sixth resistor R6 is connected to a common connection end between the emitter of the third triode Q3 and the emitter of the fourth triode Q4, and a second end of the sixth resistor R6 is electrically connected to the NMOS transistor Q5.
The third triode Q3 and the fourth triode Q4 are geminate transistors in the MOS tube push-pull sub-circuit, the third triode Q3 is an upper tube, and the rapid conduction capability of the NMOS tube Q5 is enhanced; the fourth triode Q4 is a lower tube, so that the rapid turn-off capability of the NMOS tube Q5 is enhanced; through the MOS tube push-pull sub-circuit with the structure, the rapid on-off capacity of the NMOS tube Q5 is enhanced with smaller conduction loss.
Example two
As shown in fig. 7, the present embodiment provides a steam cleaning apparatus, including:
an apparatus body;
the direct current power supply is arranged on the equipment body;
the steam assembly is arranged on the equipment body and is electrically connected with the direct-current power supply; and
the constant power control circuit of the first embodiment is electrically connected to both the dc power supply and the steam component of the steam cleaning device, and is configured to control the steam component to operate at a constant power under the power supplied by the dc power supply.
The steam cleaning equipment of this embodiment, based on constant power control circuit, steam assembly wherein can realize continuous and stable steam effect with the operation of constant power, has effectively promoted equipment cleaning effect and user experience and has felt.
Specifically, as shown in fig. 7, a water path and a steam line corresponding to the steam assembly are further disposed on the device body, the water path is used for providing liquid for the steam assembly, and the steam line is used for transmitting steam generated by the steam assembly to other assemblies (such as a cleaning assembly) of the steam cleaning device.
Preferably, as shown in fig. 7, the steam cleaning apparatus further includes:
the water tank is arranged on the equipment body, is communicated with the water path of the steam assembly and is used for storing liquid;
the steam component is used for heating and vaporizing the liquid in the water tank into steam at constant power; and
and the cleaning component is communicated with a steam pipeline in the steam component and is used for cleaning according to the steam generated in the steam component.
Through above-mentioned steam cleaning equipment, can reach good clean purpose with continuous and stable steam effect.
In particular, the steam cleaning device comprises at least one of: a steam floor washing machine, a steam mop and a steam purifier.
The water tank, the steam component and the cleaning component in the steam cleaning device of the embodiment all adopt the existing conventional structures or products, and the specific details are not described herein. Meanwhile, the constant power control circuit in this embodiment is the same as the constant power control circuit in the first embodiment, details of the constant power control circuit in this embodiment are not described in detail in the first embodiment and the specific descriptions in fig. 1 to 6, and details are not described here again.
It should be noted that the utility model discloses only solve when adopting the direct current power supply to supply power to steam cleaning equipment through hardware circuit's among the constant power control circuit improvement, along with direct current power supply's voltage reduction, steam cleaning equipment can reduce thereupon, lead to the increasingly poor problem of steam effect, wherein only relate to the structure of each module circuit and the improvement of each electronic component's in each module circuit connection relation, do not relate to computer program's improvement, each electronic component all can choose suitable product specification or model for use in prior art.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, a person skilled in the art can make changes or changes in other different forms without creative work, and all should belong to the protection scope of the present invention.
Claims (10)
1. A constant power control circuit for use in a steam appliance, the constant power control circuit being electrically connected to both a DC power source and a steam assembly of the steam appliance, the steam assembly being electrically connected to the DC power source, comprising:
the voltage detection circuit is electrically connected with the direct current power supply and is used for detecting the output voltage of the power supply;
the controller is electrically connected with the direct current power supply and the voltage detection circuit and used for receiving the power supply output voltage and outputting a PWM (pulse width modulation) driving signal according to the power supply output voltage; and
and the PWM driving circuit is electrically connected with the steam assembly, the direct-current power supply and the controller and used for receiving the PWM driving signal and controlling the steam assembly to run at constant power according to the PWM driving signal under the action of the power supply output voltage.
2. The constant power control circuit according to claim 1, wherein the PWM driving circuit comprises an NMOS transistor Q5;
the grid electrode of the NMOS tube Q5 is electrically connected with the controller, the drain electrode of the NMOS tube Q5 is electrically connected with the negative electrode input end of the steam component, and the source electrode of the NMOS tube Q5 is electrically connected with the negative electrode of the direct-current power supply; the positive electrode input end of the steam component is electrically connected with the positive electrode of the direct current power supply, and the common connecting end between the source electrode of the NMOS tube Q5 and the negative electrode of the direct current power supply is grounded;
and the NMOS tube Q5 is used for generating a PWM duty ratio according to a PWM driving signal and controlling the on-off of the steam assembly according to the PWM duty ratio, so that the effective voltage of the steam assembly in each control period is constant.
3. The constant power control circuit according to claim 2, wherein the PWM driving circuit further comprises a switch control sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit, and the switch control sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
the switch control sub-circuit is used for controlling the on-off of the NMOS tube Q5 according to the PWM driving signal and transmitting the PWM driving signal to the NMOS tube Q5 when the NMOS tube Q5 is switched on.
4. The constant power control circuit according to claim 3, wherein the switch control sub-circuit comprises a first transistor Q1, a first resistor R1 and a second resistor R2;
the base electrode of the first triode Q1 is electrically connected with the controller, the collector electrode of the first triode Q1 is electrically connected with the first end of the second resistor R2 through the first resistor R1, the second end of the second resistor R2 is connected with the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply, and the emitting electrode of the first triode Q1 is grounded; the NMOS tube Q5 is connected to a common connection end between the first end of the first resistor R1 and the first end of the second resistor R2.
5. The constant-power control circuit according to claim 3, wherein the PWM driving circuit further comprises a MOS transistor driving boosting sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit and the MOS tube driving improving sub-circuit in sequence, and the MOS tube driving improving sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
and the MOS tube driving and improving sub-circuit is used for improving the driving voltage of the NMOS tube Q5.
6. The constant power control circuit according to claim 5, wherein the MOS transistor driving boosting sub-circuit comprises a second transistor Q2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5;
the base electrode of the second triode Q2 is connected with the switch control sub-circuit, the collector electrode of the second triode Q2 is grounded sequentially through the third resistor R3 and the fourth resistor R4, and the emitter electrode of the second triode Q2 is connected to the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply; the first end of the fifth resistor R5 is connected to the common connection end between the third resistor R3 and the fourth resistor R4, and the second end of the fifth resistor R5 is electrically connected with the NMOS transistor Q5.
7. The constant-power control circuit according to claim 5, wherein the PWM driving circuit further comprises a MOS transistor push-pull sub-circuit;
the controller is electrically connected with the base electrode of the NMOS tube Q5 through the switch control sub-circuit, the MOS tube drive improving sub-circuit and the MOS tube push-pull sub-circuit in sequence, and the MOS tube push-pull sub-circuit is also electrically connected with the steam assembly and the direct-current power supply;
and the MOS tube push-pull sub-circuit is used for improving the rapid on-off capacity of the NMOS tube Q5.
8. The constant-power control circuit according to claim 7, wherein the MOS transistor push-pull sub-circuit comprises a third transistor Q3, a fourth transistor Q4 and a sixth resistor R6;
the base electrode of the third triode Q3 and the base electrode of the fourth triode Q4 are electrically connected with the MOS tube driving boosting sub-circuit, the collector electrode of the third triode Q3 is connected with the common connecting end between the positive electrode input end of the steam component and the positive electrode of the direct-current power supply, the collector electrode of the fourth triode Q4 is grounded, and the emitter electrode of the third triode Q3 is electrically connected with the emitter electrode of the fourth triode Q4; a first end of the sixth resistor R6 is connected to a common connection end between the emitter of the third triode Q3 and the emitter of the fourth triode Q4, and a second end of the sixth resistor R6 is electrically connected to the NMOS transistor Q5.
9. The constant power control circuit according to any one of claims 1 to 8, wherein the voltage detection circuit comprises a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a capacitor C;
the first end of the seventh resistor R7 is electrically connected with the positive pole of the direct-current power supply, the second end of the seventh resistor R7 is grounded through the eighth resistor R8, the first end of the ninth resistor R9 is connected with the common connection end between the second end of the seventh resistor R7 and the eighth resistor R8, the second end of the ninth resistor R9 is electrically connected with the controller, the first end of the capacitor C is connected with the common connection end between the second end of the ninth resistor R9 and the controller, and the second end of the capacitor C is grounded.
10. A steam cleaning device, comprising:
an apparatus body;
the direct current power supply is arranged on the equipment body;
the steam assembly is arranged on the equipment body and is electrically connected with the direct-current power supply; and
the constant power control circuit according to any one of claims 1 to 9, electrically connected to both a dc power source and a steam component of the steam cleaning device, for controlling the steam component to operate at a constant power under the power of the dc power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221429360.XU CN218167936U (en) | 2022-06-09 | 2022-06-09 | Constant-power control circuit and steam cleaning equipment with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221429360.XU CN218167936U (en) | 2022-06-09 | 2022-06-09 | Constant-power control circuit and steam cleaning equipment with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218167936U true CN218167936U (en) | 2022-12-30 |
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ID=84609777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221429360.XU Active CN218167936U (en) | 2022-06-09 | 2022-06-09 | Constant-power control circuit and steam cleaning equipment with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218167936U (en) |
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2022
- 2022-06-09 CN CN202221429360.XU patent/CN218167936U/en active Active
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