CN114711527B - Self-switching state blower integrated circuit - Google Patents
Self-switching state blower integrated circuit Download PDFInfo
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- CN114711527B CN114711527B CN202210243794.9A CN202210243794A CN114711527B CN 114711527 B CN114711527 B CN 114711527B CN 202210243794 A CN202210243794 A CN 202210243794A CN 114711527 B CN114711527 B CN 114711527B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 100
- 238000001514 detection method Methods 0.000 claims description 22
- 238000004804 winding Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000007664 blowing Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 206010019049 Hair texture abnormal Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D20/00—Hair drying devices; Accessories therefor
- A45D20/04—Hot-air producers
- A45D20/08—Hot-air producers heated electrically
- A45D20/10—Hand-held drying devices, e.g. air douches
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D20/00—Hair drying devices; Accessories therefor
- A45D20/04—Hot-air producers
- A45D20/08—Hot-air producers heated electrically
- A45D20/10—Hand-held drying devices, e.g. air douches
- A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
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- Cleaning And Drying Hair (AREA)
Abstract
The invention discloses a self-switching-state blower integrated circuit, which comprises a power supply driving module, a control module and a connection structure switching module, wherein the control module is connected with the power supply driving module so as to control the power supply driving module to adjust the power supply current, the connection structure switching module is respectively connected with a second heating element and a third heating element to form at least part of switching units, the switching units are connected with a first heating element in series to form at least part of series branches, and the output end of the power supply driving module is connected with the series branches to supply power for the series branches; the connecting structure switching module is internally provided with a current threshold, when the power supply current is larger than the current threshold, the connecting structure switching module enables the second heating element and the third heating element to be connected in series, and when the power supply current is smaller than the current threshold, the connecting structure switching module enables the second heating element and the third heating element to be connected in parallel; the design has simple structure, good blowing effect and reduced production and research cost.
Description
Technical Field
The invention relates to the technical field of blowers, in particular to a self-switching state blower integrated circuit.
Background
The hair dryer is used for drying hair, generally has high heat and well heat gear, and the user selects different temperatures according to the demand, and traditional hair dryer generally includes fan and piece that generates heat, when switching different temperatures, the drive circuit in the hair dryer is for the piece that generates heat applys different supply current to the piece that generates heat sends different heat.
The hot air can quickly dry hair, but damages the hair, the inventor researches and develops a hair dryer, an independent main air duct, a first auxiliary air duct and a second auxiliary air duct are arranged in the hair dryer, a main air outlet communicated with the main air duct is positioned between a first auxiliary air outlet communicated with the first auxiliary air duct and a second auxiliary air outlet communicated with the second auxiliary air duct, a first heating element is arranged in the main air duct, a second heating element is arranged in the first auxiliary air duct, a third heating element is arranged in the second auxiliary air duct, when a user selects a middle heat gear, the heating power of the first heating element is higher than that of the second heating element and the third heating element, so that the central position of the middle part of the air flow blown by the hair dryer has higher temperature and lower ambient temperature, and the damage to the hair by a certain number of people is found through data acquisition of the applicant, so that the hair dryer with the intention is greatly reduced.
However, in the actual development process, the applicant found that, because the number of heating elements is increased compared with the number of heating elements of the conventional blower, and the heating power of the second heating element and the third heating element is different from that of the first heating element, the heating power needs to be separately controlled, and meanwhile, in order to provide the effect of quick drying, the mode of generating high heat by using high current through the heating elements cannot be abandoned in the conventional high-heat gear, so that, to meet the above requirements, the manufacturer needs to develop a blower driving circuit with a complicated structure, and even needs to combine a control chip and an accessory circuit to perform driving control on each heating element, however, this also means that the production cost and the development cost are increased, and it is difficult to meet the requirements of the manufacturer.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the self-switching-state blower integrated circuit which has simple structure, good blowing effect and reduced production and research costs.
According to an embodiment of the first aspect of the invention, a self-switching-state blower integrated circuit is applied to a blower, the blower comprises a shell, a blower, a first heating element, a second heating element and a third heating element, a wind cavity, a main wind channel, a first auxiliary wind channel and a second auxiliary wind channel which are all communicated with the wind cavity are arranged in the shell, an air inlet communicated with the wind cavity, a main air outlet communicated with the main wind channel, a first auxiliary air outlet communicated with the first auxiliary wind channel and a second auxiliary air outlet communicated with the second auxiliary wind channel are arranged on the shell, the main air outlet is positioned between the first auxiliary air outlet and the second auxiliary air outlet, the blower is positioned in the wind cavity, the first heating element is positioned in the main wind channel, the second heating element is positioned in the first auxiliary wind channel, and the third heating element is positioned in the second auxiliary wind channel; the integrated circuit includes: the power supply driving module is used for being connected with a power supply; the control module is connected with the power supply driving module to control the power supply driving module to adjust the power supply current; the switching unit is connected with the first heating element in series to form at least part of a series branch, and the output end of the power supply driving module is connected with the series branch to supply power for the series branch; the connecting structure switching module is internally provided with a current threshold, when the power supply current is larger than the current threshold, the connecting structure switching module enables the second heating element and the third heating element to be connected in series, and when the power supply current is smaller than the current threshold, the connecting structure switching module enables the second heating element and the third heating element to be connected in parallel.
According to the embodiment of the invention, the self-switching state blower integrated circuit has at least the following beneficial effects:
The integrated circuit of the hair dryer drives the hair dryer to at least have a high-heat blowing mode and a medium-heat blowing mode, under the high-heat blowing mode, the power supply driving module outputs relatively high power supply current, the power supply current is larger than a current threshold value, the connecting structure switching module enables the second heating element and the third heating element to be connected in series, in a series branch, the currents passing through the first heating element, the second heating element and the third heating element are equal, the currents are all the power supply currents output by the power supply driving module, the hair dryer starts to blow, and at the moment, the hair dryer can blow out high-heat wind current and quickly blow hair with high humidity; in the medium-heat blowing mode, the power supply driving module outputs relatively lower power supply current, the power supply current is smaller than a current threshold value, the connecting structure switching module enables the second heating element and the third heating element to be connected in parallel, the first heating element is connected with a switching unit formed by the second heating element and the third heating element in series, at the moment, the current flowing through the first heating element is the magnitude of the power supply current, the second heating element and the third heating element have a shunting effect, the heating value of the second heating element and the heating value of the third heating element are smaller than the heating value of the first heating element, and therefore the purposes that the temperature of the center of the air flow blown by the blower is higher and the surrounding temperature is relatively lower are achieved, and a user can be used for blowing hair with lower humidity, and meanwhile damage to hair can be reduced; the integrated circuit structure of the blower of this design has realized the automatic switching to the first piece that generates heat, the second piece that generates heat and the third piece that generates heat of the size according to the power supply current, and simple structure has good effect of blowing, production, research and development cost reduction.
According to some embodiments of the invention, the connection structure switching module includes a first current limiter, a diode D4, and a second current limiter, wherein one end of the first current limiter is connected to one end of the second heat generating element and one end of the first heat generating element, the other end of the first current limiter is connected to one end of the third heat generating element and a cathode of the diode D4, the other end of the second heat generating element is connected to one end of the second current limiter and an anode of the diode D4, and the other end of the second current limiter is connected to the other end of the second heat generating element, wherein when the supply current is greater than the current threshold, the first current limiter and the second current limiter are both open, and when the supply current is less than the current threshold, the first current limiter and the second current limiter are both closed.
According to some embodiments of the invention, the control module is further configured to detect a supply current information by connecting the current detection module to the series branch.
According to some embodiments of the invention, the power supply driving module comprises a rectifying voltage regulating unit and a switch driving unit, wherein an input end of the rectifying voltage regulating unit is used for being connected with a power supply, an output end of the rectifying voltage regulating unit is connected with one end of the serial branch, an input end of the switch driving unit is connected with the other end of the serial branch, an output end of the switch driving unit is grounded, and the control module is connected with a controlled end of the switch driving unit to regulate the magnitude of power supply current through the switch driving unit.
According to some embodiments of the present invention, the rectifying and voltage regulating unit includes a rectifier, a transformer, and a switching tube Q2, where an input end of the rectifier is connected to a power supply, an output end of the rectifier is connected to one end of a primary winding of the transformer, an input end of the switching tube Q2 is connected to the other end of the primary winding of the transformer, a secondary winding of the transformer is connected to one end of the serial branch, an output end of the switching tube Q2 is grounded, and the control module is connected to a controlled end of the switching tube Q2.
According to some embodiments of the invention, the power supply system further comprises a voltage detection module, wherein the voltage detection module is used for acquiring power supply voltage information of the transformer, and the control module is connected with the voltage detection module.
According to some embodiments of the invention, the power supply circuit further comprises a gear input module, wherein the gear input module is used for acquiring a gear control signal, and the control module is connected with the gear input module to adjust the power supply current according to the gear control signal.
According to some embodiments of the invention, the first auxiliary air outlet and the second auxiliary air outlet are combined to form an annular air outlet area, and the air outlet area is sleeved on the main air outlet.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic perspective view of a blower;
Fig. 2 is a schematic view of the internal structure of the blower;
FIG. 3 is a schematic view of the structure of the air outlet of the blower;
FIG. 4 is a schematic block diagram of one embodiment of an integrated circuit of the present invention;
fig. 5 is a circuit schematic of an integrated circuit according to an embodiment of the invention.
Reference numerals:
the air conditioner comprises a shell 110, a fan 120, an air cavity 130, an air inlet 131, a main air duct 140, a first auxiliary air duct 150, a second auxiliary air duct 160, a main air outlet 170, a first auxiliary air outlet 180, a second auxiliary air outlet 190, a first heating element 200, a second heating element 300, a third heating element 400, a power supply driving module 500, a rectifying and voltage regulating unit 510, a primary winding 511, a secondary winding 512, a switch driving unit 520, a current detecting module 530, a voltage detecting module 540, a detecting winding 541, a control module 600, a connection structure switching module 700, a first current limiter 710, a second current limiter 720 and a gear input module 800.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 5, a self-switching-state integrated circuit of a blower 120 according to an embodiment of the present invention is applied to the blower 120, where the blower 120 includes a housing 110, a blower 120, a first heating element 200, a second heating element 300, and a third heating element 400, the housing 110 is provided with a main air duct 140, a first auxiliary air duct 150, and a second auxiliary air duct 160, both of which are communicated with the air duct 130, the housing 110 is provided with an air inlet 131, a main air outlet 170, a first auxiliary air outlet 180, and a second auxiliary air outlet 190, both of which are communicated with the main air duct 140, the main air outlet 170 is located between the first auxiliary air outlet 180 and the second auxiliary air outlet 190, the blower 120 is located in the air duct 130, the first heating element 200 is located in the main air duct 140, the second heating element 300 is located in the first auxiliary air duct 150, and the third heating element 400 is located in the second auxiliary air duct 160; the integrated circuit includes: the power supply driving module 500 is used for being connected with a power supply; the control module 600 is connected with the power supply driving module 500 to control the power supply driving module 500 to adjust the power supply current; the connection structure switching module 700 is connected with the second heating element 300 and the third heating element 400 respectively to form at least part of switching units, the switching units are connected in series with the first heating element 200 to form at least part of series branches, and the output end of the power supply driving module 500 is connected with the series branches to supply power for the series branches; the connection structure switching module 700 has a current threshold, when the supply current is greater than the current threshold, the connection structure switching module 700 connects the second heating element 300 and the third heating element 400 in series, and when the supply current is less than the current threshold, the connection structure switching module 700 connects the second heating element 300 and the third heating element 400 in parallel.
Wherein the main air outlet 170, the first auxiliary air outlet 180, and the second auxiliary air outlet 190 may be located in front of the housing 110 and face in the same direction, and the air inlet 131 may be located at the rear of the housing 110.
The first heat generating element 200, the second heat generating element 300, and the third heat generating element 400 may each be a heat generating element such as a heating wire, and the heat generating resistances of the first heat generating element 200, the second heat generating element 300, and the third heat generating element 400 may be the same.
The control module 600 may be composed of a processing chip such as an MCU and an accessory circuit, and may control the operation of the power driving module 500 to adjust an appropriate power supply voltage and power supply current.
In some embodiments of the present invention, the power transmission device further includes a gear input module 800, the gear input module 800 is configured to obtain a gear control signal, and the control module 600 is connected to the gear input module 800 to adjust a magnitude of a power supply current according to the gear control signal.
Specifically, the gear input module 800 may be a potentiometer, a toggle varistor, an encoder, etc., and the user may operate the gear input module 800 to different gears to form different gear control signals, and the control module 600 adjusts the magnitude of the supply current according to the gear control signals, so as to control the blower 120 to enter different blowing modes.
The integrated circuit of the blower 120 drives the blower 120 to have at least a high-heat blowing mode and a medium-heat blowing mode, in the high-heat blowing mode, the power supply driving module 500 outputs relatively high power supply current, the power supply current is larger than a current threshold value, the connection structure switching module 700 enables the second heating element 300 and the third heating element 400 to be connected in series, and in a series branch, the currents passing through the first heating element 200, the second heating element 300 and the third heating element 400 are equal and are all the power supply currents output by the power supply driving module 500, the blower 120 starts blowing, and at the moment, the blower 120 can blow out high-heat wind current and quickly blow hair with high humidity; in the medium-heat blowing mode, the power supply driving module 500 outputs relatively low power supply current, the power supply current is smaller than a current threshold, the connection structure switching module 700 enables the second heating element 300 and the third heating element 400 to be connected in parallel, and the first heating element 200 is connected in series with a switching unit formed by the second heating element 300 and the third heating element 400, at this time, the current flowing through the first heating element 200 is the magnitude of the power supply current, the second heating element 300 and the third heating element 400 have a shunting effect, and the heating value of the second heating element 300 and the third heating element 400 is smaller than that of the first heating element 200, so that the purposes that the central temperature of the air flow middle part blown by the blower 120 is higher and the surrounding temperature is relatively lower are achieved, and a user can be used for blowing hair with lower humidity and meanwhile, damage to hair can be reduced; the integrated circuit structure of the blower 120 of this design has realized the automatic switching to the first piece 200 that generates heat, the second piece 300 that generates heat and the third piece 400 that generates heat of generating heat according to the size of power supply current, and simple structure has good effect of blowing, and production, research and development cost reduce.
In some embodiments of the present invention, as shown in fig. 3, the first auxiliary air outlet 180 and the second auxiliary air outlet 190 are combined to form an annular air outlet area, and the air outlet area is sleeved on the main air outlet 170, so that the effect that the temperature of the center position of the air flow is higher and the ambient temperature is relatively lower is more obvious in the medium-heat air blowing mode.
In some embodiments of the present invention, as shown in fig. 5, the connection structure switching module 700 includes a first current limiter 710, a diode D4, and a second current limiter 720, wherein one end of the first current limiter 710 is connected to one end of the second heat generating element 300 and one end of the first heat generating element 200, respectively, the other end of the first current limiter 710 is connected to one end of the third heat generating element 400 and the negative electrode of the diode D4, respectively, the other end of the second heat generating element 300 is connected to one end of the second current limiter 720 and the positive electrode of the diode D4, respectively, and the other end of the second current limiter 720 is connected to the other end of the second heat generating element 300, wherein when the supply current is greater than the current threshold, both the first current limiter 710 and the second current limiter 720 are open, and when the supply current is less than the current threshold, both the first current limiter 710 and the second current limiter 720 are closed.
The first current limiter 710 and the second current limiter 720 may be selected from conventional semiconductor current limiting devices, according to characteristics of the first current limiter 710 and the second current limiter 720, an off current threshold is set inside, when an input current is greater than the off current threshold, the first current limiter 710 and the second current limiter 720 are turned off, when the input current is less than the off current threshold, the first current limiter 710 and the second current limiter 720 are turned on, and according to characteristics of the first current limiter 710 and the second current limiter 720, switching between a high-heat blowing mode and a medium-heat blowing mode is achieved according to a magnitude of a supply current.
For example, if the cutoff current threshold of the first current limiter 710 and the second current limiter 720 is 1A, and assuming that the resistance values of the first heat generating element 200, the second heat generating element 300 and the third heat generating element 400 are R, in the high-heat blowing mode, the power supply driving module 500 outputs a constant power supply current of 3A, the first current limiter 710 and the second current limiter 720 are turned off, the first heat generating element 200, the second heat generating element 300 and the third heat generating element 400 are connected in series, and the current in the branch circuit is 3A, the heat generation amount q=9rt (t is the heat generation time); in the medium-heat blowing mode, the power supply driving module 500 outputs a constant power supply current of 1A, the first current limiter 710 and the second current limiter 720 are both turned on, the second heat generating element 300 and the third heat generating element 400 are connected in parallel and then connected in series with the first heat generating element 200, the current in the series branch is 1A, that is, the current flowing through the first heat generating element 200 is 1A, the current flowing through the second heat generating element 300 and the third heat generating element 400 is 0.5A, the heat productivity q1=rt of the first heat generating element 200 in the main air duct 140, and the heat productivity q2=1/8×rt of the first auxiliary air duct 150 and the second auxiliary air duct 160, so as to generate heat quantity difference, achieve the purposes of higher temperature at the center of the air flow blown by the blower 120 and relatively lower ambient temperature, and reduce the damage to hair.
In some embodiments of the present invention, the current detection module 530 is further included, the current detection module 530 is connected to the series branch to detect the power supply current information, the current detection module 530 is connected to the control module 600, and the control module 600 can feedback-adjust the operation of the power supply driving module 500 through the detection of the power supply current information, so that the power supply current output by the power supply driving module 500 is relatively constant.
Specifically, as shown in fig. 5, the current detection module 530 may include a resistor R4 and a resistor R5, wherein one end of the resistor R4 is connected to one end of the series branch and one end of the resistor R5, the other end of the resistor R5 is grounded, and the other end of the resistor R4 is connected to the control module 600.
In some embodiments of the present invention, as shown in fig. 4 and 5, the power supply driving module 500 includes a rectifying voltage-regulating unit 510 and a switch driving unit 520, wherein an input end of the rectifying voltage-regulating unit 510 is used for being connected with a power supply, an output end of the rectifying voltage-regulating unit 510 is connected with one end of a serial branch, an input end of the switch driving unit 520 is connected with the other end of the serial branch, an output end of the switch driving unit 520 is grounded, and a control module 600 is connected with a controlled end of the switch driving unit 520 to regulate the magnitude of a power supply current through the switch driving unit 520.
The switch driving unit 520 may include a switching tube Q1, where one end of the series branch may be connected with one end of the resistor R4 and one end of the resistor R5 through the switching tube Q1, specifically, an input end of the switching tube Q1 is connected with one end of the series branch, an output end of the switching tube Q1 is connected with one end of the resistor R4 and one end of the resistor R5, and the control module 600 may output a PWM signal to control on-off of the switching tube Q1, thereby adjusting the magnitude of the supply current.
In some embodiments of the present invention, as shown in fig. 4 and 5, the rectifying and voltage regulating unit 510 includes a rectifier D1, a transformer T1, and a switching tube Q2, wherein an input end of the rectifier D1 is used for being connected to a power supply, an output end of the rectifier D1 is connected to one end of a primary winding 511 of the transformer T1, an input end of the switching tube Q2 is connected to the other end of the primary winding 511 of the transformer, a secondary winding 512 of the transformer T1 is connected to one end of a serial branch, an output end of the switching tube Q2 is grounded, and the control module 600 is connected to a controlled end of the switching tube Q2.
The control module 600 may output PWM signals to control on/off of the switching tube Q2, so as to regulate the input voltage to the primary winding 511, and finally realize regulation of the output voltage through coupling transformation of the primary winding 511 and the secondary winding 512, so that the control module 600 may provide appropriate supply voltages for the first heat generating element 200, the second heat generating element 300, and the third heat generating element 400.
In some embodiments of the present invention, the power supply driving device further includes a voltage detection module 540, the voltage detection module 540 is used for obtaining power supply voltage information of the transformer, the control module 600 is connected with the voltage detection module 540, and through detecting the power supply voltage information, the control module 600 can feedback-adjust the operation of the power supply driving module 500, so that the power supply voltage output by the power supply driving module 500 is relatively constant.
Specifically, as shown in fig. 5, the voltage detection module 540 includes a detection winding 541, a resistor R2, and a resistor R3, where the detection winding 541 is coupled to the primary winding 511 or the secondary winding 512, one end of the resistor R3 is connected to one end of the detection winding 541, the other end of the resistor R3 is connected to one end of the resistor R2 and the control module 600, and the other end of the resistor R2 is grounded.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The integrated circuit of the blower in the self-switching state is characterized by comprising a shell, a blower, a first heating element, a second heating element and a third heating element, wherein a wind cavity, a main air channel, a first auxiliary air channel and a second auxiliary air channel which are all communicated with the wind cavity are arranged in the shell; the integrated circuit includes:
the power supply driving module is used for being connected with a power supply;
The control module is connected with the power supply driving module to control the power supply driving module to adjust the power supply current;
The switching unit is connected with the first heating element in series to form at least part of a series branch, and the output end of the power supply driving module is connected with the series branch to supply power for the series branch; the connecting structure switching module is internally provided with a current threshold, when the power supply current is larger than the current threshold, the connecting structure switching module enables the second heating element and the third heating element to be connected in series, and when the power supply current is smaller than the current threshold, the connecting structure switching module enables the second heating element and the third heating element to be connected in parallel;
The connection structure switching module comprises a first current limiter, a diode D4 and a second current limiter, wherein one end of the first current limiter is connected with one end of the second heating element and one end of the first heating element respectively, the other end of the first current limiter is connected with one end of the third heating element and the negative electrode of the diode D4 respectively, the other end of the second heating element is connected with one end of the second current limiter and the positive electrode of the diode D4 respectively, the other end of the second current limiter is connected with the other end of the second heating element, the first current limiter and the second current limiter are both opened when the power supply current is larger than the current threshold, and the first current limiter and the second current limiter are both closed when the power supply current is smaller than the current threshold.
2. A self-switching blower integrated circuit as set forth in claim 1, wherein: the power supply circuit further comprises a current detection module, wherein the current detection module is connected with the serial branch circuit to detect power supply current information, and the current detection module is connected with the control module.
3. A self-switching blower integrated circuit as set forth in claim 1, wherein: the power supply driving module comprises a rectifying voltage regulating unit and a switch driving unit, wherein the input end of the rectifying voltage regulating unit is connected with a power supply, the output end of the rectifying voltage regulating unit is connected with one end of the serial branch, the input end of the switch driving unit is connected with the other end of the serial branch, the output end of the switch driving unit is grounded, and the control module is connected with the controlled end of the switch driving unit to regulate the power supply current through the switch driving unit.
4. A self-switching blower integrated circuit as set forth in claim 3, wherein: the rectifying and voltage regulating unit comprises a rectifier, a transformer and a switching tube Q2, wherein the input end of the rectifier is used for being connected with a power supply, the output end of the rectifier is connected with one end of a primary winding of the transformer, the input end of the switching tube Q2 is connected with the other end of the primary winding of the transformer, a secondary winding of the transformer is connected with one end of a series branch, the output end of the switching tube Q2 is grounded, and the control module is connected with a controlled end of the switching tube Q2.
5. The self-switching blower integrated circuit of claim 4, wherein: the power supply system further comprises a voltage detection module, wherein the voltage detection module is used for acquiring power supply voltage information of the transformer, and the control module is connected with the voltage detection module.
6. A self-switching blower integrated circuit as set forth in claim 1, wherein: the gear control device comprises a gear input module, a gear control module and a control module, wherein the gear input module is used for acquiring a gear control signal, and the control module is connected with the gear input module to adjust the magnitude of power supply current according to the gear control signal.
7. A self-switching blower integrated circuit as set forth in claim 1, wherein: the first auxiliary air outlet and the second auxiliary air outlet are combined to form an annular air outlet area, and the air outlet area is sleeved on the main air outlet.
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| CN202210243794.9A CN114711527B (en) | 2022-03-10 | 2022-03-10 | Self-switching state blower integrated circuit |
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| CN202210243794.9A CN114711527B (en) | 2022-03-10 | 2022-03-10 | Self-switching state blower integrated circuit |
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| CN114711527A CN114711527A (en) | 2022-07-08 |
| CN114711527B true CN114711527B (en) | 2024-05-14 |
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|---|---|
| CN114711527A (en) | 2022-07-08 |
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