Garment steamer control circuit and garment steamer
By combining a snap-action thermostat with a voltage conversion circuit in the steam garment steamer, normal operation without a radiator is achieved under different voltages, solving the problem of increased main control board size and realizing the miniaturization design of the steam garment steamer.
Patent Information
- Application Number
- CN202520467337.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Existing steam garment steamers require voltage conversion circuits to generate a large amount of heat when adapting to different voltages, resulting in an increase in the size of the main control board and hindering product miniaturization.
By combining a snap-action temperature controller with a voltage conversion circuit, the temperature of the heating element is controlled through intermittent operation, reducing heat generation and eliminating the need for a radiator.
It enables normal operation under different voltages without the need for a heat sink, reduces the size of the main control board, and makes the steam garment steamer more compact and portable.
Smart Images
Figure CN223728182U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the utility model relates to garment steamer technical field, especially steam garment steamer control circuit and steam garment steamer. BACKGROUND
[0002] Steam garment steamer is a device that can continuously contact clothes and cloth through the hot steam generated inside, and can soften the fiber organization of clothes and cloth, so that clothes and cloth are flat. Since steam garment steamer is used for ironing in the natural hanging state of clothes, it does not need an ironing board and does not need to turn over the clothes, and the ironing effect is better than that of ordinary iron, and the clothes are not easy to be damaged, which is suitable for ironing high-grade fabrics and is very convenient to use, so it is favored by more and more consumers and is widely accepted by the market.
[0003] Since the voltage used in each country and region is not the same, in order to make the steam garment steamer adapt to different input voltages, it is often necessary to set a voltage conversion circuit inside the steam garment steamer. However, the voltage conversion circuit will generate a large amount of heat when working, so a radiator needs to be set on the main control board of the steam garment steamer to dissipate heat, so as to ensure the normal operation of the steam garment steamer. However, when the large radiator is installed on the main control board of the steam garment steamer, it will cause the main control board to be large in size, and thus the steam garment steamer will be large in size, which hinders the miniaturization design of the product. CONTENT OF THE UTILITY MODEL
[0004] The embodiment of the utility model provides a steam garment steamer control circuit and steam garment steamer to solve the technical problem that the main control board of the existing steam garment steamer relies on the radiator for heat dissipation when adapting to full voltage work, which causes the main control board to be large in size and the steam garment steamer to be large in size.
[0005] To achieve the above-mentioned purpose, in the first aspect, the embodiment of the utility model provides a steam garment steamer control circuit, which comprises a surge type temperature controller, a voltage conversion circuit and a steam garment steaming module; the voltage conversion circuit is electrically connected with the steam garment steaming module and the commercial power supply, and is used for converting the commercial power supply with different voltages into the rated voltage required by the steam garment steaming module for work; the surge type temperature controller is electrically connected with the voltage conversion circuit, and is installed on the heating body of the steam garment steaming module to directly obtain the temperature of the heating body. The surge type temperature controller is turned on or turned off according to the temperature of the heating body, and thus the voltage conversion circuit is powered on or powered off.
[0006] In some preferred embodiments, the steam garment steamer control circuit further comprises a control module connected with the voltage conversion circuit, which is used for controlling the output voltage of the voltage conversion circuit.
[0007] In some preferred embodiments, the voltage conversion circuit comprises a heating body voltage conversion circuit, the heating body voltage conversion circuit comprises a heating main circuit and a heating control circuit, the heating main circuit comprises a loop between a live wire of commercial power, a heating body, a first thyristor and a zero wire of commercial power connected in series, and the heating control circuit comprises a circuit between the control end of the first thyristor connected by the control module,
[0008] The snap-action temperature controller is arranged on the heating main circuit to control the power-on or power-off of the heating main circuit, or arranged on the heating control circuit to control the power-on or power-off of the heating control circuit.
[0009] In some preferred embodiments, the heating control circuit further comprises a photo-coupler, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, the input end of the light source of the photo-coupler is connected to the first end of the first resistor, the second end of the first resistor is connected to the first port of the control module and the first end of the second resistor, the output end of the light source of the photo-coupler and the second end of the second resistor are grounded, the input end of the light receiver of the photo-coupler is connected to the first end of the first thyristor through the fourth resistor, the third resistor is connected in parallel to the fourth resistor, the output end of the light receiver of the photo-coupler is connected to the control end of the first thyristor and one end of the fifth resistor, and the second end of the fifth resistor is connected to the second end of the first thyristor.
[0010] In some preferred embodiments, the voltage conversion circuit further comprises a water pump voltage conversion circuit, the steam pressing module further comprises a water pump, the water pump voltage conversion circuit comprises a water pump main circuit and a water pump control circuit, the water pump main circuit comprises a loop between a live wire of commercial power, a water pump, a second thyristor and a ground wire connected in series, and the water pump control circuit comprises a circuit between the control end of the second thyristor connected by the control module.
[0011] In some preferred embodiments, the water pump control circuit further comprises a sixth resistor, a seventh resistor and a first capacitor, the first end of the seventh resistor is connected to the second port of the control module and the first end of the sixth resistor, the second end of the seventh resistor is connected to the control end of the second thyristor, the second end of the sixth resistor is grounded, and the first capacitor is connected in parallel to the sixth resistor.
[0012] In some preferred embodiments, the first thyristor is a bidirectional thyristor, and the second thyristor is a unidirectional thyristor.
[0013] In some preferred embodiments, the steam press control circuit further comprises a power grid synchronization detection circuit, the power grid synchronization detection circuit comprising a voltage dividing resistor, an eighth resistor, a triode, a ninth resistor, a first end of the voltage dividing resistor being connected to a live wire of the mains, a second end of the voltage dividing resistor being connected to a first end of the eighth resistor and a base of the triode, a second end of the eighth resistor and an emitter of the triode being grounded, a collector of the triode being connected to a first end of the ninth resistor and a third port of the control module, a second end of the ninth resistor being connected to a +5V VCC power supply.
[0014] In some preferred embodiments, the steam press control circuit further comprises a power supply module, the power supply module comprising a first diode and a non-inductive offline AC linear voltage stabilizing chip, an anode of the first diode being connected to the live wire of the mains, a cathode of the first diode being connected to an input port of the non-inductive offline AC linear voltage stabilizing chip, an output port of the non-inductive offline AC linear voltage stabilizing chip outputting a +5V VCC power supply.
[0015] In the second aspect, the utility model embodiment further provides a steam press, the steam press comprises the steam press control circuit of the first aspect.
[0016] The utility model embodiment has the following beneficial effects:
[0017] The steam press control circuit of the utility model embodiment converts the mains of different voltages into the rated voltage required by each functional module in the steam press through the voltage conversion circuit, so that the steam press can work at full voltage; when the voltage conversion circuit works normally, the heating body is powered to generate heat, so that the temperature obtained by the snap-action temperature controller installed on the heating body will rise, when the temperature of the snap-action temperature controller rises to the action temperature, the snap-action temperature controller will automatically disconnect, so that the voltage conversion circuit and the heating body are powered off and stop working, after the heating body is powered off, the temperature obtained by the snap-action temperature controller will also decrease, when the temperature of the snap-action temperature controller decreases to the reset temperature, the snap-action temperature controller will be turned on to power on the voltage conversion circuit and the heating body, so as to make the snap-action temperature controller work intermittently, and then make the voltage conversion circuit work intermittently, so as to reduce the power consumption and heat, so that the product can work normally without the help of a radiator, thereby reducing the size of the main control board and making the whole machine smaller and easier to carry.
[0018] In the above embodiments, the steam press and the corresponding steam press control circuit embodiment belong to the same concept, so they have the same technical effects as the corresponding steam press control circuit embodiment, which will not be described here.
[0019] In addition to the purposes, features and advantages described above, the embodiments of the present application have other purposes, features and advantages. The embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0020] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the embodiments of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:
[0021] Figure 1 is a control principle diagram of a steam garment steamer control circuit of one embodiment of the present application;
[0022] Figure 2 is a control principle diagram of a steam garment steamer control circuit of another embodiment of the present application;
[0023] Figure 3 is a circuit diagram of a heating body voltage conversion circuit and a power supply module of one embodiment of the present application;
[0024] Figure 4 is a circuit diagram of a water pump voltage conversion circuit of one embodiment of the present application;
[0025] Figure 5 is a circuit diagram of a power grid synchronous detection circuit of one embodiment of the present application;
[0026] Figure 6 is a waveform diagram of a heating body voltage conversion circuit of one embodiment of the present application.
[0027] Among them, the reference signs are as follows: 1, a snap-action temperature controller; 2, a voltage conversion circuit; 21, a heating body voltage conversion circuit; 22, a water pump voltage conversion circuit; 3, a steam garment steaming module; 31, a heating body; 32, a water pump; 4, a control module; 5, a power grid synchronous detection circuit. DETAILED DESCRIPTION
[0028] The utility model embodiment technical scheme makes further detailed elaboration below combining with the drawings and specific embodiments of the description. In addition, unless otherwise defined, the technical terms or scientific terms used in the application description should be the usual meaning understood by the general technical personnel in the field to which the application belongs. The words indicating the direction or position relationship such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer" and the like used in the application description are only used to indicate the relative direction or position relationship, and not to imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the described object changes, the relative position relationship may also change accordingly, therefore, it cannot be understood as a limitation on the application. The "first", "second", "third" and similar terms used in the application description are only for description purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The "one", "an" or "the" and similar terms used in the application description should not be understood as an absolute limitation on the quantity, but should be understood as the existence of at least one. The "include" or "contain" and similar terms used in the application description mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects.
[0029] It should be further noted that, unless otherwise explicitly defined and limited, the "installation", "connection", "connection" and similar terms used in the description of the application should be broadly understood, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, and the person skilled in the art can understand the specific meaning of the application according to the specific circumstances. As Figure 1 As shown in the figure, the steam pressing machine control circuit of the embodiment includes a snap-action temperature controller 1, a voltage conversion circuit 2 and a steam pressing module 3. The voltage conversion circuit 2 is electrically connected to the steam pressing module 3 and the commercial power supply, and is used to convert the commercial power supply with different voltages into the rated voltage required for the operation of the steam pressing module 3. The snap-action temperature controller 1 is electrically connected to the voltage conversion circuit 2, and the snap-action temperature controller 1 is installed on the heating body 31 of the steam pressing module 3 to directly obtain the temperature of the heating body 31. The snap-action temperature controller 1 is turned on or turned off according to the temperature of the heating body 31, thereby making the voltage conversion circuit 2 energized or de-energized.
[0030] Wherein, the voltage conversion circuit 2 is arranged on the main control board of the garment steamer, ACL represents the AC live wire, ACN represents the AC neutral wire, in the garment steamer, the steam ironing module 3 is a component for generating hot steam to iron clothes, generally including a heating body 31 and a water pump 32, the water pump 32 delivers normal temperature water to the heating body 31, and the normal temperature water is heated into hot steam by the heating body 31, the steam ironing module 3 includes a control circuit and a working component, and the steam ironing module 3 in the embodiment specifically refers to the control circuit of the steam ironing module 3.
[0031] In the embodiment, in order to make the snap-action temperature controller 1 more accurately acquire the temperature change of the heating body 31, the snap-action temperature controller 1 is arranged adjacent to the heating body 31 of the steam ironing module 3, so as to directly acquire the temperature of the heating body 31, and make the snap-action temperature controller 1 more sensitive.
[0032] In the embodiment, the AC live wire, the steam ironing module 3, the snap-action temperature controller 1, the voltage conversion circuit 2 and the AC neutral wire are sequentially connected in series to form a main circuit, the voltage conversion circuit 2 controls the conduction angle of the steam ironing module 3 connected to the AC, so as to control the rated voltage required by the steam ironing module 3, and the voltage conversion circuit 2 can perform voltage regulation by, for example, a thyristor or the like; in other embodiments, the voltage conversion circuit 2 can be directly connected to the mains, and then the rated voltage required by the steam ironing module 3 is output after voltage transformation (for example, by a transformer).
[0033] In the embodiment, the snap-action temperature controller 1 is a normally closed automatic reset temperature controller, when the temperature acquired by the snap-action temperature controller 1 reaches the action temperature, the internal contact of the snap-action temperature controller 1 is disconnected, so as to disconnect the heating body 31 and the voltage conversion circuit 2, after the disconnection, the voltage conversion circuit 2 and the heating body 31 stop working, the temperature acquired by the snap-action temperature controller 1 decreases, and when the temperature decreases to the reset temperature of the snap-action temperature controller 1, the snap-action temperature controller 1 is automatically reset, so as to power on the steam ironing module 3 and the voltage conversion circuit 2 to normally work.
[0034] The steam pressing machine control circuit of the embodiment can precisely control the rated voltage required by the steam pressing module 3 by controlling the conduction angle of the steam pressing module 3 when the voltage conversion circuit 2 is working, so that the steam pressing machine can work at full voltage. When the voltage conversion circuit 2 is working normally, the heating body 31 is powered to generate heat, and the temperature obtained by the snap-action temperature controller 1 arranged adjacent to the heating body 31 will rise. When the temperature of the snap-action temperature controller 1 rises to the action temperature, the snap-action temperature controller 1 will automatically disconnect, so that the voltage conversion circuit 2 and the heating body 31 are powered off and stop working. After the heating body 31 is powered off, the temperature obtained by the snap-action temperature controller 1 will also decrease. When the temperature of the snap-action temperature controller 1 decreases to the reset temperature, the snap-action temperature controller 1 will be turned on to make the voltage conversion circuit 2 and the heating body 31 normally powered again. In this way, the snap-action temperature controller 1 works intermittently, and the voltage conversion circuit 2 is in an intermittent working state, so as to reduce power consumption and heat, and the main control board of the steam pressing machine can work normally without the help of a radiator, thereby reducing the size of the main control board and making the steam pressing machine smaller in size and more portable.
[0035] In some preferred embodiments, as shown in Figure 1 The steam pressing machine control circuit further comprises a control module 4 connected to the voltage conversion circuit 2, which is used to control the output voltage of the voltage conversion circuit 2.
[0036] In the embodiment, the control module can be a single-chip microcomputer, which outputs a control signal to control the conduction angle of the voltage conversion circuit 2, so as to precisely control the rated voltage required by the steam pressing module 3. In other embodiments, the conduction angle of the voltage conversion circuit 2 can also be controlled by circuit design, for example, by the charging and discharging principle of a capacitor to make the voltage conversion circuit 2 work and not work alternately.
[0037] It can be understood that the snap-action temperature controller 1 is directly connected in series in the main circuit between the voltage conversion circuit 2 and the steam pressing module 3, and the on-off of the snap-action temperature controller 1 will make the steam pressing module 3 and the voltage conversion circuit 2 synchronously power on and off. In other embodiments, the snap-action temperature controller 1 can also be installed in the control circuit between the voltage conversion circuit 2 and the control module 4, and the on-off of the snap-action temperature controller 1 can also make the voltage conversion circuit 2 synchronously power on and off.
[0038] In some preferred embodiments, as shown in Figure 2 and Figure 3As shown, the voltage conversion circuit 2 includes a heating element voltage conversion circuit 21, which includes a heating main circuit and a heating control circuit. The heating main circuit includes a loop connected in series between the mains live wire, the heating element 31, the first thyristor Q14, and the mains neutral wire. The heating control circuit includes a line connecting the control module 4 to the control terminal of the first thyristor. A snap-action thermostat 1 is installed on the heating main circuit to control the heating main circuit to be powered on or off, or it is installed on the heating control circuit to control the heating control circuit to be powered on or off.
[0039] In this embodiment, the first thyristor Q14 is specifically a bidirectional thyristor. Whether the first thyristor Q14 is turned on is controlled by the HOT_CTRL control signal input from the control module 4 to the control terminal of the first thyristor Q14. When the HOT_CTRL control signal is high, the first thyristor Q14 is turned on, and the heating element 31 is powered on. When the HOT_CTRL control signal is low, the first thyristor Q14 is turned off, and the heating element 31 is de-powered. The conduction angle of the first thyristor Q14 can be controlled by the HOT_CTRL control signal, thereby precisely controlling the voltage required by the heating element 31.
[0040] Specifically, such as Figure 6 As shown, the following explanation uses the conversion of 220V AC mains power to 110V to power the heating element 31 as an example. The sine wave diagram represents the waveform of the 220V AC mains power, and the square wave diagram represents the waveform of the HOT_CTRL control signal. The following explanation uses one sine wave cycle of the AC mains power as an example: During the time interval from 0 to π / 2, the HOT_CTRL control signal is high, and the first thyristor Q14 is turned on, at which time the AC mains voltage is applied to the heating element 31. During the time interval from π / 2 to π, the HOT_CTRL control signal is low, the first thyristor Q14 is turned off, and the heating element 31 is de-energized. During the time interval from π to 3π / 2, the HOT_CTRL control signal is high, and the first thyristor Q14 is turned on. The mains voltage is applied in reverse to the heating element 31. During the time period from 3π / 2 to 2π, the OT_CTRL control signal is at a low level, the first thyristor Q14 is cut off, and the heating element 31 is de-energized. Thus, it can be seen that only half of the voltage is applied to the heating element 31 within one sine wave cycle. In this embodiment, the rated operating voltage of the heating element 31 is 110V. The equivalent voltage of the mains voltage applied to the heating element 31 can be controlled by the duty cycle of the HOT_CTRL control signal. Therefore, the conduction angle of the bidirectional thyristor can be precisely controlled by the control module 4 outputting PWM (pulse width modulation signal) with different duty cycles to precisely control the rated voltage required by the heating element 31.
[0041] In the embodiment, the snap-action temperature controller 1 is a normally closed automatic reset temperature controller, which is arranged on the heating main circuit and controls the power-on or power-off of the heating main circuit according to the temperature change of the first thyristor Q14. In other embodiments, the snap-action temperature controller 1 can also be arranged on the heating control circuit to control the power-on or power-off of the heating control circuit. When the heating control circuit is powered off, the first thyristor Q14 remains off, so that the heating main circuit is powered off. In some preferred embodiments, the heating control circuit further comprises a photo-coupler Q11, a first resistor R57, a second resistor R58, a third resistor R9, a fourth resistor R59 and a fifth resistor R40. The input end of the light source of the photo-coupler Q11 is connected to the first end of the first resistor R57, the second end of the first resistor R57 is connected to the first port of the control module 4 and the first end of the second resistor R58, the output end of the light source of the photo-coupler Q11 and the second end of the second resistor R58 are grounded, the input end of the light receiver of the photo-coupler Q11 is connected to the first end of the first thyristor Q14 through the fourth resistor R59, the third resistor R9 is connected in parallel with the fourth resistor R59, the output end of the light receiver of the photo-coupler Q11 is connected to the control end of the first thyristor Q14 and the first end of the fifth resistor R40, and the second end of the fifth resistor R40 is connected to the second end of the first thyristor Q14.
[0042] In the embodiment, the high level of the HOT_CTRL control signal output by the control module 4 is a logic level of +5V, and the voltage loaded on both ends of the first thyristor Q14 is the mains. In order to avoid the direct impact of the mains on the control module 4, the photo-coupler Q11 is used for isolation in the embodiment. The high level of the HOT_CTRL control signal is divided by the first resistor R57 and the second resistor R58 to drive the light source of the photo-coupler Q11 to emit light. After the light receiver of the photo-coupler Q11 receives the light signal, it is turned on. The mains is divided by the third resistor R9, the fourth resistor R59 and the fifth resistor R40 to input a voltage to the control end of the first thyristor Q14, thereby driving the first thyristor Q14 to conduct. The high and low voltage isolation is realized by the photo-coupler Q11 in the embodiment, which can not only protect the control module 4, but also drive the high voltage through the low level of the control module 4.
[0043] In some preferred embodiments, as shown in Figure 2 and Figure 4 The voltage conversion circuit 2 further comprises a water pump voltage conversion circuit 22, and the steam pressing module 3 further comprises a water pump 32. The water pump voltage conversion circuit 22 comprises a water pump main circuit and a water pump control circuit. The water pump main circuit comprises a loop between the mains live wire, the water pump 32, the second thyristor Q2 and the ground wire connected in series. The water pump control circuit comprises a line between the control module 4 and the control end of the second thyristor Q2.
[0044] In the embodiment, the second controllable silicon Q2 is a unidirectional controllable silicon, and whether the second controllable silicon Q2 is turned on is controlled by a WATERPUMP control signal input to a control end of the second controllable silicon Q2 by the control module 4. When the WATERPUMP control signal is at a high level, the second controllable silicon Q2 is turned on, and the heating body 31 is powered on to work. When the WATERPUMP control signal is at a low level, the second controllable silicon Q2 is turned off, and the heating body 31 is powered off. The conduction angle of the second controllable silicon Q2 can be controlled by the WATERPUMP control signal, and the voltage required by the water pump 31 can be accurately controlled.
[0045] In some preferred embodiments, the water pump control circuit further comprises a sixth resistor R11, a seventh resistor R13, and a first capacitor C3. A first end of the seventh resistor is connected to a second port of the control module 4 and a first end of the sixth resistor, a second end of the seventh resistor is connected to a control end of the second controllable silicon Q2, a second end of the sixth resistor is grounded, and the first capacitor C3 is connected in parallel with the sixth resistor.
[0046] Specifically, in the embodiment, a diode D4 is further arranged between the water pump 32 and the second controllable silicon Q2. The diode D4 performs half-wave rectification on the mains. Since the diode D4 is connected to the live wire of the mains, the diode D4 is turned on during the positive cycle of the mains and is turned off during the negative cycle of the mains. The maximum voltage at which the water pump 32 works is half of the voltage of the mains. The second controllable silicon Q2 is unidirectional and can only control the conduction angle during the positive cycle of the mains. The WATERPUMP control signal output by the control module 4 is divided by the sixth resistor R11 and the seventh resistor R13 and is filtered by the first capacitor C3 before entering the control end of the second controllable silicon Q2. When the WATERPUMP control signal is at a high level during the positive cycle of the mains, the second controllable silicon Q2 is turned on, and the water pump 32 works normally. When the WATERPUMP control signal is at a low level, the second controllable silicon Q2 is turned off, and the water pump 32 is powered off. The working voltage of the water pump 32 can be controlled by controlling the conduction time of the second controllable silicon Q2 by the WATERPUMP control signal.
[0047] In the embodiment, after the snap-action temperature controller 1 is turned off to power off the heating body 31, the water pump voltage conversion circuit is not affected, and the water pump 32 can still deliver normal-temperature water to the heating body 31. After the normal-temperature water reaches the heating body 31, the temperature of the heating body 31 is rapidly cooled, and the natural cooling is combined to make the temperature of the heating body 31 drop more rapidly. Therefore, the temperature obtained by the snap-action temperature controller 1 reaches the reset temperature more quickly, the reset speed of the snap-action temperature controller 1 is faster, and the reaction of the heating body 31 is more rapid, so that the normal work of the steam press is not affected.
[0048] In this embodiment, the water pump voltage conversion circuit 22 further includes a compensation circuit, which includes a resistor R17 and a capacitor C7 connected in series. The two ends of the compensation circuit are respectively connected to the two ends of the second thyristor Q2 to prevent the high voltage generated during the switching of the water pump 32 from breaking down the second thyristor Q2.
[0049] In some preferred embodiments, such as Figure 2 and Figure 5 As shown, the control circuit of the steam garment steamer also includes a power grid synchronization detection circuit 5. The power grid synchronization detection circuit 5 includes a voltage divider resistor, an eighth resistor R4, a transistor Q5, and a ninth resistor R14. The first end of the voltage divider resistor is connected to the mains live wire, the second end of the voltage divider resistor is connected to the first end of the eighth resistor R4 and the base of the transistor Q5, the second end of the eighth resistor R4 and the emitter of the transistor Q5 are grounded, the collector of the transistor Q5 is connected to the first end of the ninth resistor R14 and the third port of the control module 4, and the second end of the ninth resistor R14 is connected to the +5V VCC power supply.
[0050] In this embodiment, transistor Q5 is an NPN transistor. The voltage divider resistors include resistors R3 and R28. The AC mains power is divided by resistors R3, R28, and the eighth resistor R4 before being input to the base of transistor Q5. Therefore, the base voltage of transistor Q5 is AC mains power ACL * R4 / (R4 + R3 + R28). When there is voltage at the base of transistor Q5, it will conduct, causing the third port of control module 4 (i.e., Figure 5 The signal obtained from OVER_ZERO_DET is low level. When the mains power crosses zero, the base voltage of transistor Q5 is 0, and transistor Q5 is cut off. The third port of control module 4 is connected to VCC through the ninth resistor R14. At this time, the third port of control module 4 obtains a high level. The ninth resistor R14 acts as a pull-up resistor. Therefore, when the third port of control module 4 obtains a high level, the mains power crosses zero, thus realizing the detection of mains power zero crossing. After the control module 4 obtains the mains power zero crossing point, it outputs a square wave signal according to the zero crossing time to control the conduction angle of the thyristor, making the control more precise.
[0051] In some preferred embodiments, such as Figure 3 As shown, the control circuit of the steam garment steamer also includes a power supply module, which includes a first diode D1 and a non-inductive offline AC linear voltage regulator chip U1. The anode of the first diode D1 is connected to the mains power wire, the cathode of the first diode D1 is connected to the input port of the non-inductive offline AC linear voltage regulator chip U1, and the output port of the non-inductive offline AC linear voltage regulator chip U1 outputs a +5V VCC power supply.
[0052] Specifically, in this embodiment, the mains power is half-wave rectified by the first diode D1 and then input to the sensorless offline AC linear regulator chip U1. The sensorless offline AC linear regulator chip U1 regulates the voltage and outputs a +5V VCC power supply through the VOUT port to provide a stable operating voltage for other components in the circuit (such as the control module 4).
[0053] In some preferred embodiments, such as Figure 3 As shown, the control circuit of the steam garment steamer also includes a filter capacitor X1 connected to the live wire and neutral wire of the mains power supply at its two ends, and resistors R7 and R20 connected in series at their two ends to the live wire and neutral wire of the mains power supply at their two ends. The filter capacitor X1, resistors R7 and R20 constitute a filter circuit. After filtering, the signal is half-wave rectified by the first diode D1 and then input to the non-inductive offline AC linear voltage regulator chip U1. It also includes a voltage regulator resistor R24 connected to the live wire and neutral wire of the mains power supply at its two ends. The voltage regulator resistor R24 can play a surge protection role, used to stabilize the input voltage and prevent surge voltage from damaging the circuit. A fuse FUSE3 is also connected in series on the live wire of the mains power supply. The fuse FUSE3 is used to cut off the circuit when the current is too large, protecting the circuit safety.
[0054] The steam garment steamer control circuit provided in the above embodiments of this application has at least the following characteristics:
[0055] 1. By outputting the HOT_CTRL control signal through the control module 4, the conduction angle of the first thyristor Q14 is controlled, thereby precisely controlling the voltage required by the heating element 31, so that the heating element 31 can adapt to the full voltage mains power.
[0056] 2. The WATERPUMP control signal output by the control module 4 controls the conduction angle of the second thyristor Q2, thereby precisely controlling the voltage required by the water pump 32, so that the water pump 32 can adapt to the full voltage mains power.
[0057] 3. When the heating element 31 operates and the temperature obtained by the snap-action thermostat 1 is higher than the operating temperature when the first thyristor Q14 is turned on, the snap-action thermostat 1 is turned off, and the heating element 31 and the first thyristor Q14 are de-energized. After the first thyristor Q14 is de-energized, the temperature of the heating element 31 is rapidly reduced to the reset temperature of the snap-action thermostat 1 under natural cooling and cooling by room temperature water supplied by the water pump 32, causing the snap-action thermostat 1 to turn on, and the heating element 31 and the first thyristor Q14 to be energized. This causes the first thyristor Q14 to be in an intermittent working state, reducing power consumption and heat generation, so that the steam garment steamer can work normally without the need for a radiator for heat dissipation, thereby reducing the size of the main control board and the overall size of the steam garment steamer.
[0058] This application also provides a steam garment steamer, which includes the steam garment steamer control circuit as described in the above embodiments.
[0059] The steam press of the embodiment acquires the temperature of the heating body 31 through the snap-action temperature controller 1, intermittently energizes the first thyristor Q14, reduces the power consumption and heat generation of the first thyristor Q14, and enables the steam press to normally work without a radiator, thereby reducing the volume of the main control board and the overall volume of the steam press.
[0060] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A control circuit for a steam garment steamer, characterized in that, The steam pressing module (3) is connected with the voltage conversion circuit (2) and the mains, and the voltage conversion circuit (2) is used for converting the mains with different voltages into rated voltage required by the steam pressing module (3) for working. The voltage conversion circuit (2) is connected with the control module (4) and used for controlling the output voltage of the voltage conversion circuit (2). The voltage conversion circuit (2) comprises a heating body voltage conversion circuit (21) and a water pump voltage conversion circuit (22).
2. The garment steamer control circuit of claim 1, wherein, The heating body voltage conversion circuit (21) comprises a heating main circuit and a heating control circuit.
3. The garment steamer control circuit of claim 2, wherein, The heating main circuit comprises a loop between the mains live wire, the heating body (31), the first thyristor and the mains zero line in series. The heating control circuit comprises a circuit between the control module (4) and the control end of the first thyristor. The heating control circuit further comprises a photoelectric coupler, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor.
4. The garment steamer control circuit of claim 3, wherein, The input end of the light source of the photoelectric coupler is connected with the first end of the first resistor, the second end of the first resistor is connected with the first port of the control module (4) and the first end of the second resistor, the output end of the light source of the photoelectric coupler and the second end of the second resistor are grounded, the input end of the light receiver of the photoelectric coupler is connected with the first end of the first thyristor through the fourth resistor, the third resistor is connected with the fourth resistor in parallel, the output end of the light receiver of the photoelectric coupler is connected with the control end of the first thyristor and one end of the fifth resistor, and the second end of the fifth resistor is connected with the second end of the first thyristor. The water pump voltage conversion circuit (22) comprises a water pump main circuit and a water pump control circuit.
5. The garment steamer control circuit of claim 3, wherein, The water pump main circuit comprises a loop between the mains live wire, the water pump (32), the second thyristor and the ground wire in series. The water pump control circuit comprises a circuit between the control module (4) and the control end of the second thyristor.
6. The garment steamer control circuit of claim 5, wherein, The water pump control circuit further comprises a sixth resistor, a seventh resistor and a first capacitor. The first end of the seventh resistor is connected with the second port of the control module (4) and the first end of the sixth resistor, the second end of the seventh resistor is connected with the control end of the second thyristor, the second end of the sixth resistor is grounded, and the first capacitor is connected with the sixth resistor in parallel.
7. The garment steamer control circuit of claim 5, wherein, The first thyristor is a bidirectional thyristor, and the second thyristor is a unidirectional thyristor.
8. The garment steamer control circuit of claim 5, wherein, Further comprising a power grid synchronization detection circuit (5), the power grid synchronization detection circuit (5) comprising a voltage dividing resistor, an eighth resistor, a transistor, a ninth resistor, The first end of the voltage dividing resistor is connected to a live wire of commercial power, the second end of the voltage dividing resistor is connected to the first end of the eighth resistor and the base of the transistor, the second end of the eighth resistor and the emitter of the transistor are grounded, the collector of the transistor is connected to the first end of the ninth resistor and the third port of the control module (4), and the second end of the ninth resistor is connected to a +5V VCC power supply.
9. The garment steamer control circuit of claim 1, wherein, Further comprising a power supply module, the power supply module comprising a first diode and a non-inductive offline AC linear voltage stabilizing chip, The anode of the first diode is connected to a live wire of commercial power, the cathode of the first diode is connected to the input port of the non-inductive offline AC linear voltage stabilizing chip, and the output port of the non-inductive offline AC linear voltage stabilizing chip outputs a +5V VCC power supply.
10. A garment steamer, characterized in that, The steam garment steamer comprises the steam garment steamer control circuit according to any one of claims 1-9.