Control circuit and heater

Abstract

The present application provides a control circuit and a heater, which obtain a level signal by checking the working circuit. The driving circuit controls the relay under the action of the level signal to output the first voltage of the power supply circuit to the first output circuit or the second output circuit, thereby outputting the first voltage or the second voltage to the fan. Since the first voltage and the second voltage are different, different fan speeds can be achieved, so that the fan speed can be controlled through the control circuit.

Description

Technical Field

[0001] The present application relates to the technical field of air heaters, and in particular to a control circuit and an air heater. Background Art

[0002] As a classic heating appliance, fan heaters can dispel the chill and bring warmth to people during the coldest winter months, making them particularly suitable for the elderly, the young, and the frail. Their rapid heating and powerful air output can instantly alleviate discomfort and mobility issues caused by frozen limbs. Fan heaters typically feature different fan speed settings to provide a more comfortable experience. However, conventional fan speed settings are typically adjusted through controller chip programming, which is a costly process. Summary of the Invention

[0003] In response to the above problems, the present application provides a control circuit and a heater, which can control the fan speed through the control circuit.

[0004] The present application provides a control circuit, comprising:

[0005] a power supply circuit, configured to output a first voltage;

[0006] Working circuit;

[0007] a voltage detection circuit, electrically connected to the working circuit, for detecting a voltage signal of the working circuit and converting the voltage signal into a level signal;

[0008] a driving circuit, electrically connected to the voltage detection circuit;

[0009] a relay, electrically connected to the drive circuit and to the power supply circuit;

[0010] a first output circuit, one end of the first output circuit being connected to the relay, the other end of the first output circuit being connected to the fan, and the first output circuit being configured to output a second voltage;

[0011] A second output circuit, one end of the second output circuit is connected to the relay, the other end of the second output circuit is connected to the fan, the second output circuit is used to output the first voltage, wherein the drive circuit controls the relay under the action of the level signal to output the first voltage of the power supply circuit to the first output circuit or the second output circuit, and the first voltage is different from the second voltage.

[0012] In some embodiments, the power supply circuit includes: a first mechanical switch and a power conversion circuit, one end of the first mechanical switch is connected to the power supply, the other end of the first mechanical switch is connected to the power conversion circuit, the power conversion circuit is connected to the relay, and the power conversion circuit is used to convert the third voltage of the power supply into the first voltage.

[0013] In some embodiments, the working circuit includes: a first working circuit, the voltage detection circuit includes: a first voltage detection circuit, the first working circuit includes: a second mechanical switch and a first heating element, one end of the second mechanical switch is connected to the power supply, and the other end of the second mechanical switch is connected to the input end of the first heating element and the input end of the first voltage detection circuit.

[0014] In some embodiments, the working circuit also includes: a second working circuit, the voltage detection circuit includes: a second voltage detection circuit, the second working circuit includes: a third mechanical switch and an oscillating asynchronous motor, one end of the third mechanical switch is connected to the power supply, and the other end of the third mechanical switch is connected to the input end of the oscillating asynchronous motor and the input end of the second voltage detection circuit.

[0015] In some embodiments, the working circuit also includes: a third working circuit, the voltage detection circuit includes: a third voltage detection circuit, the third working circuit includes: a fourth mechanical switch and a second heating element, one end of the fourth mechanical switch is connected to the power supply, and the other end of the fourth mechanical switch is connected to the input end of the second heating element and the input end of the third voltage detection circuit.

[0016] In some embodiments, when the first mechanical switch is closed, the first voltage detection circuit, the second voltage detection circuit, and the third voltage detection circuit output corresponding level signals to the drive circuit based on the voltage signals detected from each working circuit. Under the action of each level signal, the drive circuit controls the relay to output the first voltage of the power supply circuit to the first output circuit or the second output circuit.

[0017] In some embodiments, the driving circuit includes: multiple transistors, which are turned on or off under the action of various level signals to control the relay to output the first voltage of the power supply circuit to the first output circuit or the second output circuit.

[0018] In some embodiments, the first output circuit includes: a voltage conversion circuit, one end of the voltage conversion circuit is connected to the relay, the other end of the voltage conversion circuit is connected to the fan, and the voltage conversion circuit is used to convert the first voltage into the second voltage.

[0019] In some embodiments, the control circuit further includes: an indicator light circuit, wherein the indicator light circuit is connected to the output end of the power conversion circuit.

[0020] An embodiment of the present application provides a heater, including: the control circuit described above.

[0021] The present application provides a control circuit and a heater, which obtain a level signal by checking the working circuit. The driving circuit controls the relay under the action of the level signal to output the first voltage of the power supply circuit to the first output circuit or the second output circuit, thereby outputting the first voltage or the second voltage to the fan. Since the first voltage and the second voltage are different, different fan speeds can be achieved, so that the fan speed can be controlled through the control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, the present application will be described in more detail based on embodiments with reference to the accompanying drawings.

[0023] Figure 1 A schematic diagram of the structure of a control circuit provided in an embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of a driving circuit provided in an embodiment of the present application;

[0025] In the drawings, like components are given like reference numerals, and the drawings are not drawn to scale. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limiting this application. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0028] If similar descriptions of "first\second\third" appear in the application documents, the following explanation will be added. In the following description, the terms "first\second\third" are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0030] Based on the problems existing in the related art, an embodiment of the present application provides a control circuit, which includes: a power supply circuit, a working circuit, a voltage detection circuit, a drive circuit, a relay, a first output circuit and a second output circuit, wherein the power supply circuit is used to output a first voltage; the voltage detection circuit is electrically connected to the working circuit, and is used to detect the voltage signal of the working circuit and convert the voltage signal into a level signal; the drive circuit is electrically connected to the voltage detection circuit; the relay is electrically connected to the drive circuit and is connected to the power supply circuit; one end of the first output circuit is connected to the relay, and the other end of the first output circuit is connected to the fan, and the first output circuit is used to output a second voltage; one end of the second output circuit is connected to the relay, and the other end of the second output circuit is connected to the fan, and the second output circuit is used to output a first voltage, wherein the drive circuit controls the relay under the action of the level signal to output the first voltage of the power supply circuit to the first output circuit or the second output circuit, and the first voltage is greater than the second voltage.

[0031] In an embodiment of the present application, the first voltage may be a voltage less than the mains voltage, and the voltage signal may include: a first voltage signal and a second voltage signal, wherein the first voltage signal is less than the second voltage signal. In an embodiment of the present application, when the working circuit is powered on, the voltage signal is the second voltage signal, and when each working circuit is not powered on, the voltage signal is the first voltage signal. In an embodiment of the present application, the voltage detection circuit may convert the voltage signal into a level signal, and the level signal may include: a first level signal and a second level signal, wherein the first level signal is greater than the second level signal. In an embodiment of the present application, the power supply circuit is used to supply power to the drive circuit and the voltage detection circuit when powered on.

[0032] In the embodiment of the present application, the fan is a DC fan. The relay can be a single-pole double-position relay. In the embodiment of the present application, the relay can be connected to the first output circuit by default, and the drive circuit can drive the relay to connect to the second output circuit.

[0033] In the embodiment of the present application, the working circuit may include multiple circuits, and the voltage detection circuit may also include multiple circuits, each voltage detection circuit is used to detect the voltage signal of the corresponding working circuit.

[0034] The present application provides a control circuit that obtains a level signal by checking a working circuit. In the driving circuit, the relay is controlled under the action of the level signal to output the first voltage of the power supply circuit to the first output circuit or the second output circuit, thereby outputting the first voltage or the second voltage to the fan. Since the first voltage and the second voltage are different, different fan speeds can be achieved, thereby enabling the fan speed to be controlled through the control circuit.

[0035] In some embodiments, the power supply circuit includes: a first mechanical switch and a power conversion circuit, one end of the first mechanical switch is connected to the power supply, the other end of the first mechanical switch is connected to the power conversion circuit, the power conversion circuit is connected to the relay, and the power conversion circuit is used to convert the third voltage of the power supply into the first voltage.

[0036] Figure 1 A schematic diagram of a control circuit provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the power supply circuit includes: a first mechanical switch 1 and a power conversion circuit AC-DC, one end of the first mechanical switch 1 is connected to the live wire of the power supply, the other end of the first mechanical switch 1 is connected to the AC-DC, the AC-DC is connected to the relay, and the AC-DC is used to convert the third voltage of the power supply into the first voltage.

[0037] In the embodiment of the present application, AC-DC can be used to convert mains power into direct current of a first voltage.

[0038] In some embodiments, the working circuit includes: a first working circuit, multiple voltage detection circuits include: a first voltage detection circuit, the first working circuit includes: a second mechanical switch and a first heating element, one end of the second mechanical switch is connected to the power supply, and the other end of the second mechanical switch is connected to the input end of the first heating element and the input end of the first voltage detection circuit.

[0039] Continue to see Figure 1 The first heating element can be represented by PTC1, and the first voltage detection circuit can be represented by voltage detection circuit-blocking L. In the embodiment of the present application, the first working circuit includes: a second mechanical switch 2 and PTC1, one end of the second mechanical switch 2 is connected to the live wire of the power supply, and the other end of the second mechanical switch 2 is connected to the input end of the PTC1 and the input end of the voltage detection circuit-blocking L, and PTC1 is connected to the neutral wire of the power supply.

[0040] In some embodiments, the working circuit also includes: a second working circuit, the multiple voltage detection circuits include: a second voltage detection circuit, the second working circuit includes: a third mechanical switch and an oscillating asynchronous motor, one end of the third mechanical switch is connected to the power supply, and the other end of the third mechanical switch is connected to the input end of the oscillating asynchronous motor and the input end of the second voltage detection circuit.

[0041] Continue to see Figure 1 The second voltage detection circuit is represented in the figure by the voltage detection circuit - oscillating head R. The second working circuit includes: a third mechanical switch 3 and an asynchronous motor. One end of the third mechanical switch 3 is connected to the live wire of the power supply, and the other end of the third mechanical switch is connected to the input end of the oscillating head asynchronous motor and the input end of the voltage detection circuit - oscillating head R. The asynchronous motor is connected to the neutral wire of the power supply.

[0042] In some embodiments, the working circuit also includes: a third working circuit, the multiple voltage detection circuits include: a third voltage detection circuit, the third working circuit includes: a fourth mechanical switch and a second heating element, one end of the fourth mechanical switch is connected to the power supply, and the other end of the fourth mechanical switch is connected to the input end of the second heating element and the input end of the third voltage detection circuit.

[0043] Continue to see Figure 1 The third voltage detection circuit can be a voltage detection circuit - high-speed H, and the second heating element is PTC2. The third working circuit includes: a fourth mechanical switch 4 and a PTC2. One end of the fourth mechanical switch 4 is connected to the live wire of the power supply, and the other end of the fourth mechanical switch 4 is connected to the input end of PTC2 and the input end of the voltage detection circuit - high-speed H. PTC2 is connected to the neutral wire of the power supply.

[0044] In some embodiments, the control circuit further includes: an indicator light circuit, wherein the indicator light circuit is connected to the output end of the power conversion circuit.

[0045] In some embodiments, the first output circuit includes: a voltage conversion circuit, one end of the voltage conversion circuit is connected to the relay, the other end of the voltage conversion circuit is connected to the fan, and the voltage conversion circuit is used to convert the first voltage into the second voltage.

[0046] Continue to see Figure 1 The indicator light circuit is represented by an LED, and the voltage conversion circuit includes a DC-DC. The multiple voltage detection circuits, drive circuits, relays, and the first output circuit and the second output circuit are integrated on the controller mainboard.

[0047] In an embodiment of the present application, when the first mechanical switch is closed, the first voltage detection circuit, the second voltage detection circuit and the third voltage detection circuit output corresponding level signals to the drive circuit based on the voltage signals detected from each working circuit. Under the action of each level signal, the drive circuit controls the relay to output the first voltage of the power supply circuit to the first output circuit or the second output circuit.

[0048] For example, the following logic functions can be realized in seven different working states by using three working circuits and a power supply circuit:

[0049] State 1: When mechanical switches 1, 2, 3, and 4 are all disconnected, the entire system is not powered on, the power indicator LED is off, and the entire machine is in the off state.

[0050] State 2: In an embodiment of the present application, when the first mechanical switch is closed and the first voltage detection circuit, the second voltage detection circuit and the third voltage detection circuit detect that the voltage signals of each working circuit are first voltage signals, the drive circuit controls the relay to output the first voltage to the first output circuit.

[0051] In the embodiment of the present application, when the first mechanical switch is closed and the first voltage detection circuit, the second voltage detection circuit and the third voltage detection circuit detect that the voltage signal of each working circuit is the first voltage signal, the mechanical switch 1 is closed, 2, 3, and 4 are disconnected. At this time, the two heating elements (PTC1 and PTC2) and the oscillating asynchronous motor are not powered on and do not work. The three "voltage detection circuits" on the controller mainboard detect that the voltage is a low signal, which is input to the logic drive circuit to control the relay to make it normally closed ( Figure 1 The controller mainboard converts the input 220V mains power into a first voltage VCC1 through "AC-DC", and then converts it into a second voltage VCC2 through a "DC-DC" relay. VCC1>VCC2, and outputs it to the DC fan to achieve low air volume and speed. At the same time, VCC1 separately powers the power indicator LED to light it up. At this time, the whole machine is in the "soft wind" gear with low air volume and no heating.

[0052] State 3: When the first mechanical switch is closed, the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, and the voltage signals of the corresponding working circuits detected by the second and third voltage detection circuits are the first voltage signals, the drive circuit controls the relay to output the first voltage to the first output circuit.

[0053] In the embodiment of the present application, when the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, and the voltage signal of the corresponding working circuit detected by the second voltage detection circuit and the third voltage detection circuit is the first voltage signal, the mechanical switches 1 and 2 are closed, and 3 and 4 are disconnected. At this time, the heating element PTC1 is energized for heating, PTC2 and the oscillating asynchronous motor are not powered and do not work, the controller mainboard "voltage detection circuit_low gear L (X2)" detects a high voltage signal, and the other two voltage detection circuits detect low voltage signals, which are input to the logic drive circuit to control the relay to make it normally closed ( Figure 1 The controller motherboard converts the input 220V mains power into VCC1 through AC-DC, and then converts it into VCC2 through a DC-DC relay and outputs the voltage to the DC fan to achieve low air volume and speed. At the same time, VCC1 supplies power to the power indicator LED to light it up. At this time, the whole machine is in the "low heat" gear with low air volume and low heating.

[0054] State 4: When the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the first voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the second voltage signal, the drive circuit controls the relay to output the first voltage to the second output circuit.

[0055] In the embodiment of the present application, when the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the first voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the second voltage signal, then mechanical switches 1, 2, and 4 are closed, and 3 is disconnected. At this time, the heating elements PTC1 and PTC2 are energized for heating, and the shaking asynchronous motor is not powered and does not work. The controller mainboard "voltage detection circuit_low gear L (X2)" and "voltage detection circuit_high gear H (X4)" detect a high voltage signal, and "voltage detection circuit_shaking R (X3)" detects a low voltage signal, which is input to the logic drive circuit to control the relay to make it operate ( Figure 1 The controller motherboard converts the input 220V mains power into VCC1 through AC-DC, and then directly outputs it to the DC fan through the relay to achieve high air volume and speed. At the same time, VCC1 supplies power to the power indicator LED separately to make it light up. At this time, the whole machine is in the "high heat" gear with high air volume and high heating.

[0056] State 5: When the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is a first voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is a second voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is a first voltage signal, the drive circuit controls the relay to output the first voltage to the second output circuit.

[0057] When the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the first voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the second voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the first voltage signal, the mechanical switches 1 and 3 are closed, and 2 and 4 are disconnected. At this time, the shaking asynchronous motor is powered on and works, and the heating elements PTC1 and PTC2 are not powered on and do not work. The controller mainboard "voltage detection circuit_shaking R (X3)" detects a high voltage signal, and the other two voltage detection circuits detect low voltage signals, which are input to the logic drive circuit to control the relay to make it operate ( Figure 1 The controller mainboard converts the input 220V mains power into VCC1 through AC-DC, and then outputs it directly to the DC fan through the relay to achieve high air volume and speed. At the same time, VCC1 supplies power to the power indicator LED separately to make it light up. At this time, the whole machine is in the "strong wind shaking" gear with high air volume, no heating and shaking.

[0058] State 6: When the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the second voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the first voltage signal, the drive circuit controls the relay to output the first voltage to the first output circuit.

[0059] In the embodiment of the present application, when the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the second voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the first voltage signal, then the mechanical switches 1, 2, and 3 are closed, and 4 is disconnected. At this time, the shaking asynchronous motor is powered on and works, the heating element PTC1 is powered on and works, and PTC2 is not powered on and does not work. The controller mainboard "voltage detection circuit_low gear L (X2)" and "voltage detection circuit_shaking gear R (X3)" detect a high voltage signal, and "voltage detection circuit_high gear H (X4)" detects a low voltage signal, which is input to the logic drive circuit to control the relay to make it normally closed ( Figure 1 The controller mainboard converts the input 220V mains power into VCC1 through AC-DC, and then converts it into VCC2 voltage through a DC-DC relay and outputs it to the DC fan to achieve low air volume and speed. At the same time, VCC1 supplies power to the power indicator LED separately to make it light up. At this time, the whole machine is in the "low heat shaking" gear with low air volume and low heating and shaking.

[0060] State 7: When the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the second voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the second voltage signal, the drive circuit controls the relay to output the first voltage to the second output circuit, wherein the second voltage signal is greater than the first voltage signal.

[0061] In the embodiment of the present application, when the first mechanical switch is closed, and the voltage signal of the first working circuit detected by the first voltage detection circuit is the second voltage signal, the voltage signal of the second working circuit detected by the second voltage detection circuit is the second voltage signal, and the voltage signal of the third working circuit detected by the third voltage detection circuit is the second voltage signal, the mechanical switches 1, 2, 3, and 4 are all closed. At this time, the heating elements PTC1, PTC2, and the oscillating asynchronous motor are all powered on and working, and the "voltage detection circuit" detects a high voltage signal, which is input to the logic drive circuit to control the relay to make it operate ( Figure 1 The controller mainboard converts the input 220V mains power into VCC1 through AC-DC, and then outputs it directly to the DC fan through the relay to achieve high air volume and speed. At the same time, "VCC1" alone supplies power to the power indicator LED to light it up. At this time, the whole machine is in the "high heat shaking" gear with high air volume and high heating and shaking.

[0062] In some embodiments, the driving circuit includes: multiple transistors, which are turned on or off under the action of various level signals to control the relay to output the first voltage of the power supply circuit to the first output circuit or the second output circuit.

[0063] In the embodiment of the present application, by turning on or off the transistors in the driving circuit, it is possible to control different wind speed gears without using chip programming, thereby meeting the design requirements of mechanical products.

[0064] Figure 2 A schematic diagram of a driving circuit provided in an embodiment of the present application is shown in FIG. Figure 2As shown, the driving circuit includes: 11 transistors, including 7 NPN transistors and 4 PNP transistors, and the multiple transistors include: a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10 and an eleventh transistor Q11, wherein the base of the first transistor Q1 is connected to the output end (L) of the first voltage detection circuit, and the emitter of the first transistor Q1 is connected to the output end (L) of the first voltage detection circuit. The collector of the first transistor Q1 is connected to the chip power supply and the base of the third transistor Q3. The emitter of the third transistor Q3 is grounded. The collector of the third transistor Q3 is connected to the base of the fourth transistor Q4. The emitter of the fourth transistor Q4 is connected to the chip power supply. The collector of the fourth transistor Q4 is connected to the relay K2 and the collector of the seventh transistor Q7. The emitter of the seventh transistor Q7 is connected to the chip power supply. The base of the seventh transistor Q7 is connected to the collector of the sixth transistor Q6. The base of the transistor Q6 is connected to the output terminal (H) of the third voltage detection circuit, the emitter of the sixth transistor Q6 is grounded, the base of the eighth transistor Q8 is connected to the output terminal (R) of the second voltage detection circuit, the collector of the eighth transistor Q8 is connected to the base of the ninth transistor Q9, the emitter of the eighth transistor Q8 is grounded, the emitter of the ninth transistor Q9 is connected to the chip power supply, the collector of the ninth transistor Q9 is connected to the base of the second transistor Q2, and the collector of the second transistor Q2 is connected to the relay K2. The emitter of the second transistor Q2 is grounded, the base of the eleventh transistor Q11 is connected to the output end (H) of the third voltage detection circuit, the collector of the eleventh transistor Q11 is connected to the base of the tenth transistor Q10, the emitter of the eleventh transistor Q11 is grounded, the emitter of the tenth transistor Q10 is connected to the chip power supply, the collector of the tenth transistor Q10 is connected to the base of the fifth transistor Q5, the collector of the fifth transistor Q5 is connected to the relay K2, and the emitter of the fifth transistor Q5 is grounded.

[0065] In the embodiment of the present application, the level signal controls the opening and closing of the transistor, which can drive the relay to be attracted / released. The default contact of the relay is 4. At this time, the "VCC1" voltage is connected to a DC-DC power conversion circuit through the signal port of relay A and converted into VCC2 to power the fan port; when the relay is attracted, the contact is turned to 3, and at this time VCC1 directly powers the fan port.

[0066] The specific implementation process is: under the control of the mechanical switch, when the whole machine is turned on the low heat gear, the strong electric signal of the heating element PTC1 is converted into a weak electric signal through the mainboard "voltage detection circuit_low gear L (X2)", and at this time the low heat detection port signal L is a high level signal; when the whole machine is turned on the high heat gear, the strong electric signal of the heating element PTC2 is converted into a weak electric signal through the mainboard "voltage detection circuit_high gear H (X4)", and at this time the high heat detection port signal H is a high level signal; when the whole machine is turned on the shaking gear, the strong electric signal of the shaking asynchronous motor is converted into a weak electric signal through the mainboard "voltage detection circuit_shaking head R (X3)", and at this time the shaking head detection port signal R is a high level signal.

[0067] At this time, corresponding to the different gears of the whole machine, Table 1 is the corresponding relationship table of different level signal inputs, transistor and relay working states. In Table 1, switch state: 1 represents closed, 0 represents open; voltage detection signal: 1 represents detected as a high voltage signal, 0 represents detected as a low voltage signal; As shown in Table 1,

[0068]

[0069]

[0070] The control circuit provided in the embodiment of the present application can realize the matching requirements of wind speed for different gears of the whole machine, and provide an indicator light with stable voltage to ensure stable brightness. Therefore, without using a software program driver, the six working gear modes of the heater can be realized completely by building a pure hardware circuit - soft wind, static heat, strong heat, strong wind shaking head, static heat shaking head, and strong heat shaking head.

[0071] At the same time, a pure hardware control solution is adopted. By applying the switching function of the transistor, a set of logic circuits is built and combined with the strong power input switched by the mechanical switch, which can well realize the different logic output functions corresponding to different inputs. Then, a single-pole double-position relay is used in combination with a "DC-DC" power conversion circuit to cleverly realize the output of two different voltages, thereby realizing the dual-speed wind speed function of the whole machine. While realizing the function of the software program, it also saves the cost of using chips and their peripheral circuits.

[0072] Based on the aforementioned embodiments, an embodiment of the present application further provides a heater, including: the control circuit in any of the aforementioned embodiments.

[0073] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0074] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0075] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0076] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0077] In addition, all functional units in the embodiments of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the above-mentioned integrated units can be implemented in the form of hardware or in the form of hardware plus software functional units.

[0078] Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROMs), magnetic disks, optical disks, and other media that can store program codes.

[0079] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a controller to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks or optical disks.

[0080] The above is merely an embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A control circuit, characterized in that: include: a power supply circuit, configured to output a first voltage; A working circuit, the working circuit comprising: a first working circuit, the first working circuit comprising: a second mechanical switch and a first heating element; a voltage detection circuit electrically connected to the working circuit, configured to detect a voltage signal of the working circuit and convert the voltage signal into a level signal, the voltage detection circuit comprising: a first voltage detection circuit, one end of the second mechanical switch being connected to a power supply, and the other end of the second mechanical switch being connected to an input end of the first heating element and an input end of the first voltage detection circuit; a driving circuit, electrically connected to the voltage detection circuit; a relay, electrically connected to the drive circuit and to the power supply circuit; a first output circuit, one end of the first output circuit being connected to the relay, the other end of the first output circuit being connected to the fan, and the first output circuit being configured to output a second voltage; a second output circuit, one end of the second output circuit being connected to the relay, the other end of the second output circuit being connected to the fan, the second output circuit being configured to output the first voltage, wherein the driving circuit controls the relay under the action of the level signal to output the first voltage of the power supply circuit to the first output circuit or the second output circuit, the first voltage being different from the second voltage; The driving circuit includes: a plurality of transistors, which are turned on or off under the action of various level signals to control the relay to output the first voltage of the power supply circuit to the first output circuit or the second output circuit.

2. The control circuit according to claim 1, wherein: The power supply circuit includes: a first mechanical switch and a power conversion circuit, one end of the first mechanical switch is connected to the power supply, the other end of the first mechanical switch is connected to the power conversion circuit, the power conversion circuit is connected to the relay, and the power conversion circuit is used to convert the third voltage of the power supply into the first voltage.

3. The control circuit according to claim 2, characterized in that: The working circuit also includes: a second working circuit, the voltage detection circuit includes: a second voltage detection circuit, the second working circuit includes: a third mechanical switch and an oscillating asynchronous motor, one end of the third mechanical switch is connected to the power supply, and the other end of the third mechanical switch is connected to the input end of the oscillating asynchronous motor and the input end of the second voltage detection circuit.

4. The control circuit according to claim 3, characterized in that: The working circuit also includes: a third working circuit, the voltage detection circuit includes: a third voltage detection circuit, the third working circuit includes: a fourth mechanical switch and a second heating element, one end of the fourth mechanical switch is connected to the power supply, and the other end of the fourth mechanical switch is connected to the input end of the second heating element and the input end of the third voltage detection circuit.

5. The control circuit according to claim 4, characterized in that: When the first mechanical switch is closed, the first voltage detection circuit, the second voltage detection circuit and the third voltage detection circuit output corresponding level signals to the drive circuit based on the voltage signals detected in each working circuit. Under the action of each level signal, the drive circuit controls the relay to output the first voltage of the power supply circuit to the first output circuit or the second output circuit.

6. The control circuit according to claim 1, wherein: The first output circuit includes: a voltage conversion circuit, one end of the voltage conversion circuit is connected to the relay, and the other end of the voltage conversion circuit is connected to the fan, and the voltage conversion circuit is used to convert the first voltage into the second voltage.

7. The control circuit according to claim 2, characterized in that: The control circuit further includes an indicator light circuit, which is connected to the output end of the power conversion circuit.

8. A heater, characterized in that: include: The control circuit according to any one of claims 1 to 7.

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