Power supply self-adaptive device and tower fan equipment

Abstract

The power supply adaptive device comprises a power supply input end; the input end of the voltage conversion unit is connected with the power supply input end, and the voltage conversion unit is used for converting the input voltage input from the power supply input end into the voltage range required by the controlled load unit; the input end of the post-stage output protection unit is connected with the first output end of the voltage conversion unit, the output end of the post-stage output protection unit is connected with the controlled load unit, and the post-stage output protection unit is used for outputting stable voltage; and the micro-control unit is used for controlling the voltage output to the controlled load unit. The utility model further provides tower fan equipment. Through the power supply self-adaptive device, the product does not need to specially adopt an adapter of a corresponding specification, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of power adapters, and more specifically to a power self-adapting device and a tower fan device. Background Art

[0002] At present, with the popularity of small household electrical appliances such as DC tower fans, matching power supplies, that is, power adapters, have also appeared on the market. However, due to the different manufacturers of such small household appliances and differences in product categories, power adapters of different specifications are often required. In the case of many household electrical appliances, it is easy for users to confuse these power adapters with different specifications, which may cause the power supply of electrical appliances such as the above-mentioned small household appliances to be mismatched and unable to operate normally, or even cause the electrical appliances to burn out.

[0003] Generally speaking, the voltage operating range of common adapters is between 5-60V. The improvement method to prevent users from mixing power adapters is to put warning signs on the body and product manual to remind users to pay attention to the choice of adapters. However, non-professionals do not care about the parameters of the adapter. Mixing adapters of different specifications may cause the product to work poorly or be damaged, or even cause personal safety accidents.

[0004] Therefore, the industry needs to provide an improved power adaptive device and a corresponding tower fan device to overcome the above-mentioned defects of the prior art. Utility Model Content

[0005] The purpose of the utility model is to solve the above problem and provide a power supply self-adaptive device.

[0006] In order to meet the purpose of the utility model, the utility model adopts the following technical solutions:

[0007] A power adaptive device is applied to a tower fan device, and the power adaptive device comprises:

[0008] Power input terminal, used to connect input power;

[0009] A voltage conversion unit, wherein an input end of the voltage conversion unit is connected to the power input end, and the voltage conversion unit is used to convert an input voltage input from the power input end into a voltage range required by the controlled load unit;

[0010] a post-stage output protection unit, wherein the input end of the post-stage output protection unit is connected to the first output end of the voltage conversion unit, the output end of the post-stage output protection unit is connected to the controlled load unit, and the post-stage output protection unit is used to output a stable voltage; and

[0011] A micro control unit, wherein a detection end of the micro control unit is connected to the post-stage output protection unit, a control end of the micro control unit is connected to the controlled load unit, and the micro control unit is used to control a voltage output to the controlled load unit.

[0012] Preferably, the post-stage output protection unit comprises:

[0013] An output feedback circuit, the output feedback circuit is connected to the voltage conversion unit and the micro control unit respectively, and the output feedback circuit is used to feed back the signal output by the voltage conversion unit to the micro control unit;

[0014] A switch protection circuit is connected to the output feedback circuit and the micro control unit respectively, and is used to provide a safe current to the micro control unit.

[0015] Further preferably, the micro control unit has a first detection end, a second detection end, a first control end and a second control end, the first detection end is connected to the input end of the output feedback circuit, the second detection end is connected to the output end of the output feedback circuit, the first control end is connected to the controlled end of the switch protection circuit, the second control end is connected to the controlled end of the controlled load unit, and the micro control unit is used to control the voltage output to the controlled load unit.

[0016] Preferably, the post-stage output protection unit includes: the post-stage output protection unit includes: a high-precision sampling resistor, a slow-start capacitor, a first voltage-dividing resistor, a second voltage-dividing resistor, a first and second switches, a first current-limiting resistor, a pull-down resistor, and a second-level control transistor, wherein the two ends of the high-precision sampling resistor are respectively connected to the two sampling pins and of the microcontroller unit, the front end of the first current-limiting resistor is connected to the control pin of the microcontroller unit, the first end of the precision sampling resistor is connected to the output end of the primary voltage conversion unit, the second end of the precision sampling resistor is connected to the source of the first and second switches, the first end of the slow-start capacitor is connected to the source of the first and second switches, and the second end of the slow-start capacitor is connected to the source of the first and second switches. The gate is connected, the first end of the first voltage-dividing resistor is connected to the source of the first secondary switch, the second end of the first voltage-dividing resistor is connected to the gate of the first secondary switch, the drain of the first secondary switch is connected to the output of the post-stage output protection unit, the first end of the second voltage-dividing resistor is connected to the gate of the first secondary switch, the second end of the second voltage-dividing resistor is connected to the collector of the secondary control transistor, the first end of the first current-limiting resistor is connected to the control pin of the micro control unit, the second end of the first current-limiting resistor is connected to the base of the secondary control transistor, the first end of the pull-down resistor is connected to the base of the secondary control transistor, the second end of the pull-down resistor is connected to the power ground, and the emitter of the secondary control transistor is connected to the power ground.

[0017] Preferably, the voltage conversion unit comprises:

[0018] A primary voltage conversion circuit, wherein the input end of the primary voltage conversion circuit is connected to the power input end, and the output end of the primary voltage conversion circuit is connected to the input end of the subsequent output protection unit;

[0019] A secondary voltage conversion circuit, wherein the input end of the secondary voltage conversion circuit is connected to the output end of the primary voltage conversion circuit, and the output end of the secondary voltage conversion circuit is connected to the power supply end of the micro control unit.

[0020] Further preferably, the primary voltage conversion circuit includes: a primary filter capacitor, whose positive electrode is connected to the pin of the primary voltage conversion chip, the negative electrode of the primary filter capacitor is grounded, the first end of the input secondary filter capacitor is connected to the pin of the primary voltage conversion chip, the negative electrode of the input secondary filter capacitor is grounded, the first end of the enable current limiting resistor is connected to the pin of the primary voltage conversion chip, the second end of the enable current limiting resistor is connected to the pin of the primary voltage conversion chip, the first end of the operating frequency control resistor is connected to the pin of the primary voltage conversion chip, and the second end of the frequency control resistor is grounded.

[0021] Further preferably, the secondary voltage conversion circuit includes: a buck-boost capacitor, a first end of which is connected to a pin of the primary voltage conversion chip, a second end of the buck-boost capacitor is connected to a first end of a buck-boost energy storage inductor, a first end of the buck-boost capacitor is connected to a pin of the primary voltage conversion chip, a second end of the buck-boost capacitor is connected to a second end of the buck-boost energy storage inductor, a first end of the buck-boost energy storage inductor is connected to a pin of the primary voltage conversion chip, and a second end of the buck-boost energy storage inductor is connected to a pin of the primary voltage conversion chip;

[0022] The first end of the output feedback resistor is connected to the pin of the primary voltage conversion chip, the second end of the output feedback resistor is connected to the pin of the primary voltage conversion chip, the first end of the output feedback resistor is connected to the pin of the primary voltage conversion chip, the second end of the output feedback resistor is connected to the power ground, the first end of the primary output feedback filter capacitor is connected to the pin of the primary voltage conversion chip, the second end of the primary output feedback filter capacitor is connected to the pin of the primary voltage conversion chip, the positive electrode of the primary output primary filter capacitor is connected to the pin of the primary voltage conversion chip, the negative electrode of the primary output primary filter capacitor is connected to the power ground, and the primary output The first end of the secondary filter capacitor is connected to the pin of the primary voltage conversion chip, the second end of the primary output secondary filter capacitor is connected to the power ground, the positive pole of the secondary output primary filter capacitor is connected to the pin of the secondary voltage conversion chip, the negative pole of the secondary output primary filter capacitor is connected to the power ground, the first end of the secondary output secondary filter capacitor is connected to the pin of the secondary voltage conversion chip, and the second end of the secondary output secondary filter capacitor is connected to the power ground; the pin of the secondary voltage conversion chip is connected to the pin of the primary voltage conversion chip, the pin of the secondary voltage conversion chip is connected to the power ground, and the pin of the secondary voltage conversion chip is connected to the output end of the secondary voltage conversion unit.

[0023] Preferably, the power adaptive device further comprises: a front-stage input protection unit, which is arranged in series between the power input terminal and the voltage conversion unit and is used to provide a stable input voltage for the voltage conversion unit.

[0024] Preferably, the front-stage input protection unit comprises:

[0025] Fuse, electrostatic diode, second current limiting resistor, third current limiting resistor, voltage stabilizing diode, anti-reverse connection diode, primary protection transistor, third voltage dividing resistor, fourth voltage dividing resistor, slow start capacitor and primary switch;

[0026] The first end of the fuse is connected to the positive electrode of the input power supply, the second end of the fuse is connected to the source of the primary switch, the cathode of the electrostatic diode is connected to the source of the primary switch, the anode of the electrostatic diode is grounded, the first end of the fourth voltage-dividing resistor is connected to the source of the primary switch, the second end of the fourth voltage-dividing resistor is connected to the cathode of the voltage-stabilizing diode, the anode of the voltage-stabilizing diode is grounded, the first end of the third current-limiting resistor is connected to the cathode of the voltage-stabilizing diode, the second end of the third current-limiting resistor is connected to the base of the primary protection transistor, and the emitter of the primary protection transistor is connected to the emitter of the primary protection transistor. The first-stage protection transistor is connected to the source of the first-stage switch, and the collector of the first-stage protection transistor is connected to the second end of the third voltage-dividing resistor; the first end of the third voltage-dividing resistor is connected to the source of the first-stage switch, the first end of the voltage-dividing resistor is connected to the second end of the third voltage-dividing resistor, the second end of the voltage-dividing resistor is connected to the gate of the first-stage switch, the cathode of the anti-reverse connection diode is grounded, the anode of the anti-reverse connection diode is connected to the gate of the first-stage switch, the first end of the slow-start capacitor is connected to the source of the first-stage switch, and the second end of the slow-start capacitor is connected to the gate of the first-stage switch.

[0027] A tower fan device is also provided, comprising a controlled load unit and the aforementioned power adaptive device, wherein the power adaptive device is electrically connected to the controlled load unit to provide a stable operating voltage therefor.

[0028] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0029] In the power adaptive device provided by the utility model, the risks caused by mixed use of adapters, such as motor failure to start, whole machine burnout, etc., are effectively avoided through the cooperation between the power input terminal, the voltage conversion unit, the post-stage output protection unit and the microcontroller unit; at the same time, it also avoids the problem of similar small household appliances at home needing to be connected to multiple adapters, causing inconvenience in use.

[0030] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 It is a functional module diagram of the power adaptive device of the utility model.

[0033] Figure 2 The utility model is a circuit structure diagram of a front-stage input protection unit of a power supply self-adaptive device.

[0034] Figure 3 It is a circuit structure diagram of a voltage conversion unit of the power adaptive device of the utility model.

[0035] Figure 4 The utility model is a circuit structure diagram of a rear-stage output protection unit of a power supply self-adaptive device.

[0036] Figure 5 The utility model is a circuit structure diagram of a micro control unit of a power self-adapting device.

[0037] Figure 6 The utility model is a circuit structure diagram of a controlled load unit of a power adaptive device. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0039] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may be intermediate elements. In addition, the "connection" or "coupling" used here may include wireless connection or wireless coupling. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0040] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0041] In one embodiment of the present invention, reference Figure 1-6According to an embodiment of the utility model, a power supply adaptive device is provided, which is applied to a tower fan device, comprising:

[0042] Power input terminal, used to connect input power;

[0043] A voltage conversion unit, wherein an input end of the voltage conversion unit is connected to the power input end, and the voltage conversion unit is used to convert an input voltage input from the power input end into a voltage range required by the controlled load unit;

[0044] a post-stage output protection unit, wherein the input end of the post-stage output protection unit is connected to the first output end of the voltage conversion unit, the output end of the post-stage output protection unit is connected to the controlled load unit, and the post-stage output protection unit is used to output a stable voltage; and

[0045] A micro control unit, wherein a detection end of the micro control unit is connected to the post-stage output protection unit, a control end of the micro control unit is connected to the controlled load unit, and the micro control unit is used to control a voltage output to the controlled load unit.

[0046] In the above embodiment, the voltage conversion unit converts the input voltage input from the power input terminal into the voltage range required by the controlled load unit, and then the post-stage output protection unit further stabilizes the voltage range to form a stable voltage to be provided to the controlled load unit. In other words, through the cooperation between the power input terminal, the voltage conversion unit, the post-stage output protection unit and the microcontroller unit, the risks caused by mixed use of adapters, such as the motor not starting, the whole machine burning out, etc., are effectively avoided; at the same time, it also avoids the problem that similar small household appliances at home need to be connected to multiple adapters, which causes inconvenience in use.

[0047] In one embodiment, the post-stage output protection unit includes:

[0048] An output feedback circuit, the output feedback circuit is connected to the voltage conversion unit and the micro control unit respectively, and the output feedback circuit is used to feed back the signal output by the voltage conversion unit to the micro control unit; and a switch protection circuit, the switch protection circuit is connected to the output feedback circuit and the micro control unit respectively, and the switch protection circuit is used to provide a safe current to the micro control unit. The output feedback circuit realizes the feedback of the output voltage signal of the voltage conversion unit to, for example, the micro control unit and the switch protection circuit, and then the micro control unit and the switch protection circuit analyze the received voltage signal and accurately interfere and control the voltage conversion unit again in real time to ensure that it outputs a stable voltage signal.

[0049] In one embodiment, the micro control unit has a first detection end, a second detection end, a first control end and a second control end, the first detection end is connected to the input end of the output feedback circuit, the second detection end is connected to the output end of the output feedback circuit, the first control end is connected to the controlled end of the switch protection circuit, the second control end is connected to the controlled end of the controlled load unit, and the micro control unit is used to control the voltage output to the controlled load unit.

[0050] Furthermore, the micro control unit may also include:

[0051] control chip U3, a fourth current limiting resistor R14, a fifth current limiting resistor R15, a sixth current limiting resistor R16 and a seventh current limiting resistor R17; the first end of the fourth current limiting resistor R14 is connected to the first end of the precision sampling resistor R9, the second end of the fourth current limiting resistor R14 is connected to pin 2 of the main control chip U3, the first end of the fifth current limiting resistor R15 is connected to the second end of the precision sampling resistor R9, the second end of the fifth current limiting resistor R15 is connected to pin 3 of the main control chip U3, the first end of the sixth current limiting resistor R16 is connected to the burning data port DAT, the second end of the sixth current limiting resistor R16 is connected to pin 5 of the main control chip U3, the first end of the seventh current limiting resistor R17 is connected to the burning data port CLK, the second end of the seventh current limiting resistor R17 is connected to pin 6 of the main control chip U3, the pin 8 of the main control chip U3 is connected to the power ground PGND, the main control chip U3 Pin 16 is connected to the output VDD2 of the secondary voltage conversion unit, the control pin CT_Power of the micro control unit is connected to the first end of the current limiting resistor R12, and the control pin CT_Load of the micro control unit is connected to pin 2 of the load tower fan unit; pin 1 of the load tower fan unit is connected to VO output by the post-stage output protection unit, pin 2 of the load tower fan unit is connected to the control pin CT_Load of the micro control unit, and pin 3 of the load tower fan unit is connected to the power ground PGND.

[0052] Preferably, the post-stage output protection unit includes: the post-stage output protection unit includes: a high-precision sampling resistor R9, a slow-start capacitor C8, a first voltage-dividing resistor R10, a second voltage-dividing resistor R11, a first and second switches Q3, a first current-limiting resistor R12, a pull-down resistor R13, and a second control transistor Q4, wherein the two ends of the high-precision sampling resistor R9 are respectively connected to the two sampling pins Vsa1 and Vsa2 of the micro control unit, the front end of the first current-limiting resistor R12 is connected to the control pin CT_Power of the micro control unit, the first end of the precision sampling resistor R9 is connected to the output end VDD1 of the primary voltage conversion unit, the second end of the precision sampling resistor R9 is connected to the source of the first and second switches Q3, the first end of the slow-start capacitor C8 is connected to the source of the first and second switches Q3, and the second end of the slow-start capacitor C8 is connected to the first and second switches Q3 The first end of the first voltage-dividing resistor R10 is connected to the source of the first secondary switch Q3, the second end of the first voltage-dividing resistor R10 is connected to the gate of the first secondary switch Q3, the drain of the first secondary switch Q3 is connected to the output VO of the post-stage output protection unit, the first end of the second voltage-dividing resistor R11 is connected to the gate of the first secondary switch Q3, the second end of the second voltage-dividing resistor R11 is connected to the collector of the secondary control transistor Q4, the first end of the first current-limiting resistor R12 is connected to the control pin CT_Power of the micro control unit, the second end of the first current-limiting resistor R12 is connected to the base of the secondary control transistor Q4, the first end of the pull-down resistor R13 is connected to the base of the secondary control transistor Q4, the second end of the pull-down resistor R13 is connected to the power ground PGND, and the emitter of the secondary control transistor Q4 is connected to the power ground PGND.

[0053] Specifically, when the voltage difference between the two sections of the precision sampling resistor R9 detected by the first detection terminal Vsa1 and the second detection terminal Vsa2 is within the protection range, the first control terminal CT_Power pin outputs a control signal to control the transistor Q4 to be in the on state, further ensuring that the secondary switch Q3 is turned on. When the voltage difference detected by the first detection terminal Vsa1 and the second detection terminal Vsa2 exceeds the protection range, the first control terminal CT_Power pin outputs a control signal to control the transistor Q4 to be in the off state, ensuring that the secondary switch Q3 is disconnected, and further disconnecting the controlled load. The microcontrol unit is not limited to microprocessors such as MCU, FPGA, and CPLD.

[0054] According to one embodiment, the voltage conversion unit comprises:

[0055] A primary voltage conversion circuit, wherein the input end of the primary voltage conversion circuit is connected to the power input end, and the output end of the primary voltage conversion circuit is connected to the input end of the subsequent output protection unit;

[0056] A secondary voltage conversion circuit, wherein the input end of the secondary voltage conversion circuit is connected to the output end of the primary voltage conversion circuit, and the output end of the secondary voltage conversion circuit is connected to the power supply end of the micro control unit.

[0057] Specifically, the primary voltage conversion circuit includes: a primary filter capacitor EC1, whose positive electrode is connected to the VIN pin of the primary voltage conversion chip U2, and the negative electrode of the primary filter capacitor EC1 is grounded. The first end of the input secondary filter capacitor C7 is connected to the VIN pin of the primary voltage conversion chip U2, and the negative electrode of the input secondary filter capacitor C7 is grounded. The first end of the enable current limiting resistor R5 is connected to the VIN pin of the primary voltage conversion chip U2, and the second end of the enable current limiting resistor R5 is connected to the EN pin of the primary voltage conversion chip U2. The first end of the operating frequency control resistor R8 is connected to the RT pin of the primary voltage conversion chip U2, and the second end of the frequency control resistor R8 is grounded. Among them, the voltage conversion chip U2 can be a buck-boost step-up and step-down chip or a discrete device step-up and step-down voltage regulator, which can convert the input voltage of 5-60V into 12V or 24V voltage for output. After setting the output voltage, the voltage conversion chip U2 will decide whether to boost or step down the voltage according to the input voltage, thereby realizing flexible conversion, converting different input voltages into rated output voltages for output, and realizing power supply adaptation, so that the product does not need to specially use an adapter of corresponding specifications, has a wide range of applications, and avoids damage to the product caused by users using the wrong adapter.

[0058] In another embodiment, the secondary voltage conversion circuit includes: a buck-boost capacitor C1, a first end of which is connected to the BST1 pin of the primary voltage conversion chip U2, a second end of the buck-boost capacitor C1 is connected to the first end of the buck-boost energy storage inductor L1, a first end of the buck-boost capacitor C2 is connected to the BST2 pin of the primary voltage conversion chip U2, a second end of the buck-boost capacitor C2 is connected to the second end of the buck-boost energy storage inductor L1, a first end of the buck-boost energy storage inductor L1 is connected to the SW1 pin of the primary voltage conversion chip U2, and a second end of the buck-boost energy storage inductor L1 is connected to the SW2 pin of the primary voltage conversion chip U2. Specifically, the secondary voltage conversion circuit can be implemented by using an LDO voltage regulator circuit, a BUCK step-down chip, a discrete device step-down voltage regulator source or other circuits, and the secondary voltage conversion circuit will convert the voltage again into a voltage that can be used by the microcontroller unit based on the primary voltage conversion circuit.

[0059] Here, a first end of the output feedback resistor R4 is connected to the VOUT pin of the primary voltage conversion chip U2, a second end of the output feedback resistor R4 is connected to the FB pin of the primary voltage conversion chip U2, a first end of the output feedback resistor R7 is connected to the FB pin of the primary voltage conversion chip U2, a second end of the output feedback resistor R7 is connected to the power ground PGND, a first end of the primary output feedback filter capacitor C4 is connected to the VOUT pin of the primary voltage conversion chip U2, a second end of the primary output feedback filter capacitor C4 is connected to the FB pin of the primary voltage conversion chip U2, and a positive electrode of the primary output filter capacitor EC2 is connected to the primary voltage conversion chip U2 The first terminal of the first-level output secondary filter capacitor C5 is connected to the VOUT pin of the first-level voltage conversion chip U2, and the second terminal of the first-level output secondary filter capacitor C5 is connected to the power ground PGND. The positive pole of the second-level output primary filter capacitor EC3 is connected to the Vout pin of the second-level voltage conversion chip U1, and the negative pole of the second-level output primary filter capacitor EC3 is connected to the power ground PGND. The first terminal of the second-level output secondary filter capacitor C6 is connected to the Vout pin of the second-level voltage conversion chip U1, and the second terminal of the second-level output secondary filter capacitor C6 is connected to the power ground PGND; the Vin pin of the second-level voltage conversion chip U1 is connected to the VOUT pin of the first-level voltage conversion chip U2, the GND pin of the second-level voltage conversion chip U1 is connected to the power ground PGND, and the Vout pin of the second-level voltage conversion chip U1 is connected to the output terminal VDD2 of the second-level voltage conversion unit.

[0060] Optionally, in one embodiment, the power adaptation device further includes: a front-stage input protection unit, which is arranged in series between the power input terminal and the voltage conversion unit, and is used to provide a stable input voltage for the voltage conversion unit.

[0061] Further preferably, the front-stage input protection unit comprises:

[0062] Fuse F1, electrostatic diode D1, second current limiting resistor R1, third current limiting resistor R3, voltage stabilizing diode D2, anti-reverse connection diode D3, primary protection transistor Q2, third voltage dividing resistor R2, fourth voltage dividing resistor R3, slow start capacitor C3 and primary switch Q1;

[0063] The first end of the fuse F1 is connected to the positive electrode of the input power supply VIN, the second end of the fuse F1 is connected to the source of the primary switch Q1, the cathode of the electrostatic diode D1 is connected to the source of the primary switch Q1, the anode of the electrostatic diode D1 is grounded, the first end of the fourth voltage-dividing resistor R1 is connected to the source of the primary switch Q1, the second end of the fourth voltage-dividing resistor R1 is connected to the cathode of the voltage-stabilizing diode D2, the anode of the voltage-stabilizing diode D2 is grounded, the first end of the third current-limiting resistor R3 is connected to the cathode of the voltage-stabilizing diode D2, the second end of the third current-limiting resistor R3 is connected to the base of the primary protection transistor Q2, and the emitter of the primary protection transistor Q2 is connected to the cathode of the voltage-stabilizing diode D2. The first electrode of the first-stage protection transistor Q2 is connected to the source electrode of the first-stage switch Q1, the collector electrode of the first-stage protection transistor Q2 is connected to the second end of the third voltage-dividing resistor R2; the first end of the third voltage-dividing resistor R2 is connected to the source electrode of the first-stage switch Q1, the first end of the voltage-dividing resistor R6 is connected to the second end of the third voltage-dividing resistor R2, the second end of the voltage-dividing resistor R6 is connected to the gate electrode of the first-stage switch Q1, the cathode of the anti-reverse connection diode D3 is grounded, the anode of the anti-reverse connection diode D3 is connected to the gate electrode of the first-stage switch Q1, the first end of the slow-start capacitor C3 is connected to the source electrode of the first-stage switch Q1, and the second end of the slow-start capacitor C3 is connected to the gate electrode of the first-stage switch Q1.

[0064] Specifically, when the input voltage at the input terminal VIN is lower than the voltage regulation range of D2, the first-level protection transistor Q2 is not turned on, and the voltage-dividing resistors R2 and R3 ensure that the first-level switch Q1 is in the on state. At the same time, the slow-start capacitor C3 can also prevent the impact of the instantaneous voltage of the up and down power on the first-level switch Q1, causing it to switch repeatedly. When the input voltage at the input terminal VIN is higher than the voltage regulation range of D2, the first-level protection transistor Q2 is turned on, and the voltage difference across the voltage-dividing resistor R2 is pulled down to close to 0V, thereby ensuring that the first-level switch Q1 is in the off state. This effectively ensures that the voltage input to the voltage conversion unit is within a certain safety range. In this control process, the anti-reverse connection diode D3 can ensure that the loop is not turned on after the input voltage is reversed, thereby achieving the purpose of anti-reverse connection.

[0065] The utility model also provides a tower fan device, including a controlled load unit and the aforementioned power adaptive device, wherein the power adaptive device is electrically connected to the controlled load unit to provide a stable working voltage for the controlled load unit. The controlled load unit is a load module in the tower fan device, including but not limited to resistive loads such as lamps, inductive loads such as motors, capacitive loads such as compensation capacitors, etc.

[0066] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0067] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A power adaptive device, used in tower fan equipment, characterized in that: The power adaptive device comprises: Power input terminal, used to connect input power; A voltage conversion unit, wherein an input end of the voltage conversion unit is connected to the power input end, and the voltage conversion unit is used to convert an input voltage input from the power input end into a voltage range required by a controlled load unit; a post-stage output protection unit, wherein the input end of the post-stage output protection unit is connected to the first output end of the voltage conversion unit, the output end of the post-stage output protection unit is connected to the controlled load unit, and the post-stage output protection unit is used to output a stable voltage; and A micro control unit, wherein a detection end of the micro control unit is connected to the post-stage output protection unit, a control end of the micro control unit is connected to the controlled load unit, and the micro control unit is used to control a voltage output to the controlled load unit.

2. The power adaptive device according to claim 1, characterized in that: The post-stage output protection unit comprises: An output feedback circuit, the output feedback circuit is connected to the voltage conversion unit and the micro control unit respectively, and the output feedback circuit is used to feed back the signal output by the voltage conversion unit to the micro control unit; A switch protection circuit is connected to the output feedback circuit and the micro control unit respectively, and is used to provide a safe current to the micro control unit.

3. The power adaptive device according to claim 2, characterized in that: The micro control unit has a first detection end, a second detection end, a first control end and a second control end. The first detection end is connected to the input end of the output feedback circuit, the second detection end is connected to the output end of the output feedback circuit, the first control end is connected to the controlled end of the switch protection circuit, and the second control end is connected to the controlled end of the controlled load unit. The micro control unit is used to control the voltage output to the controlled load unit.

4. The power adaptive device according to claim 1, characterized in that: The post-stage output protection unit includes: the post-stage output protection unit includes: a high-precision sampling resistor, a slow-start capacitor, a first voltage-dividing resistor, a second voltage-dividing resistor, a first and second switches, a first current-limiting resistor, a pull-down resistor, and a second-stage control transistor, wherein the two ends of the high-precision sampling resistor are respectively connected to two sampling pins and of the micro control unit, the front end of the first current-limiting resistor is connected to the control pin of the micro control unit, the first end of the precision sampling resistor is connected to the output end of the primary voltage conversion unit, the second end of the precision sampling resistor is connected to the source of the first and second switches, the first end of the slow-start capacitor is connected to the source of the first and second switches, and the second end of the slow-start capacitor is connected to the gate of the first and second switches. The first end of the first voltage-dividing resistor is connected to the source of the first secondary switch, the second end of the first voltage-dividing resistor is connected to the gate of the first secondary switch, the drain of the first secondary switch is connected to the output of the post-stage output protection unit, the first end of the second voltage-dividing resistor is connected to the gate of the first secondary switch, the second end of the second voltage-dividing resistor is connected to the collector of the secondary control transistor, the first end of the first current-limiting resistor is connected to the control pin of the micro control unit, the second end of the first current-limiting resistor is connected to the base of the secondary control transistor, the first end of the pull-down resistor is connected to the base of the secondary control transistor, the second end of the pull-down resistor is connected to the power ground, and the emitter of the secondary control transistor is connected to the power ground.

5. The power adaptive device according to claim 1, characterized in that: The voltage conversion unit comprises: A primary voltage conversion circuit, wherein the input end of the primary voltage conversion circuit is connected to the power input end, and the output end of the primary voltage conversion circuit is connected to the input end of the subsequent output protection unit; A secondary voltage conversion circuit, wherein the input end of the secondary voltage conversion circuit is connected to the output end of the primary voltage conversion circuit, and the output end of the secondary voltage conversion circuit is connected to the power supply end of the micro control unit.

6. The power adaptive device according to claim 5, characterized in that: The primary voltage conversion circuit includes: a primary filter capacitor, whose positive electrode is connected to the pin of the primary voltage conversion chip, the negative electrode of the primary filter capacitor is grounded, the first end of the input secondary filter capacitor is connected to the pin of the primary voltage conversion chip, the negative electrode of the input secondary filter capacitor is grounded, the first end of the enable current limiting resistor is connected to the pin of the primary voltage conversion chip, the second end of the enable current limiting resistor is connected to the pin of the primary voltage conversion chip, the first end of the operating frequency control resistor is connected to the pin of the primary voltage conversion chip, and the second end of the frequency control resistor is grounded.

7. The power adaptive device according to claim 6, characterized in that: The secondary voltage conversion circuit includes: a buck-boost capacitor, a first end of which is connected to a pin of the primary voltage conversion chip, a second end of the buck-boost capacitor is connected to a first end of a buck-boost energy storage inductor, a first end of the buck-boost capacitor is connected to a pin of the primary voltage conversion chip, a second end of the buck-boost capacitor is connected to a second end of the buck-boost energy storage inductor, a first end of the buck-boost energy storage inductor is connected to a pin of the primary voltage conversion chip, and a second end of the buck-boost energy storage inductor is connected to a pin of the primary voltage conversion chip; The first end of the output feedback resistor is connected to the pin of the primary voltage conversion chip, the second end of the output feedback resistor is connected to the pin of the primary voltage conversion chip, the first end of the output feedback resistor is connected to the pin of the primary voltage conversion chip, the second end of the output feedback resistor is connected to the power ground, the first end of the primary output feedback filter capacitor is connected to the pin of the primary voltage conversion chip, the second end of the primary output feedback filter capacitor is connected to the pin of the primary voltage conversion chip, the positive electrode of the primary output primary filter capacitor is connected to the pin of the primary voltage conversion chip, the negative electrode of the primary output primary filter capacitor is connected to the power ground, and the primary output The first end of the secondary filter capacitor is connected to the pin of the primary voltage conversion chip, the second end of the primary output secondary filter capacitor is connected to the power ground, the positive pole of the secondary output primary filter capacitor is connected to the pin of the secondary voltage conversion chip, the negative pole of the secondary output primary filter capacitor is connected to the power ground, the first end of the secondary output secondary filter capacitor is connected to the pin of the secondary voltage conversion chip, and the second end of the secondary output secondary filter capacitor is connected to the power ground; the pin of the secondary voltage conversion chip is connected to the pin of the primary voltage conversion chip, the pin of the secondary voltage conversion chip is connected to the power ground, and the pin of the secondary voltage conversion chip is connected to the output end of the secondary voltage conversion unit.

8. The power adaptive device according to claim 1, characterized in that: The power adaptive device further comprises: a front-stage input protection unit, which is arranged in series between the power input terminal and the voltage conversion unit and is used to provide a stable input voltage for the voltage conversion unit.

9. The power adaptive device according to claim 8, characterized in that: The front-stage input protection unit comprises: Fuse, electrostatic diode, second current limiting resistor, third current limiting resistor, voltage stabilizing diode, anti-reverse connection diode, primary protection transistor, third voltage dividing resistor, fourth voltage dividing resistor, slow start capacitor and primary switch; The first end of the fuse is connected to the positive electrode of the input power supply, the second end of the fuse is connected to the source of the primary switch, the cathode of the electrostatic diode is connected to the source of the primary switch, the anode of the electrostatic diode is grounded, the first end of the fourth voltage-dividing resistor is connected to the source of the primary switch, the second end of the fourth voltage-dividing resistor is connected to the cathode of the voltage-stabilizing diode, the anode of the voltage-stabilizing diode is grounded, the first end of the third current-limiting resistor is connected to the cathode of the voltage-stabilizing diode, the second end of the third current-limiting resistor is connected to the base of the primary protection transistor, and the emitter of the primary protection transistor is connected to the emitter of the primary protection transistor. The first-stage protection transistor is connected to the source of the first-stage switch, and the collector of the first-stage protection transistor is connected to the second end of the third voltage-dividing resistor; the first end of the third voltage-dividing resistor is connected to the source of the first-stage switch, the first end of the voltage-dividing resistor is connected to the second end of the third voltage-dividing resistor, the second end of the voltage-dividing resistor is connected to the gate of the first-stage switch, the cathode of the anti-reverse connection diode is grounded, the anode of the anti-reverse connection diode is connected to the gate of the first-stage switch, the first end of the slow-start capacitor is connected to the source of the first-stage switch, and the second end of the slow-start capacitor is connected to the gate of the first-stage switch.

10. A tower fan device, comprising a controlled load unit, characterized in that: It also includes a power adaptive device as described in any one of claims 1 to 9, wherein the power adaptive device is electrically connected to the controlled load unit to provide a stable operating voltage therefor.

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