Garment steamer circuit

Abstract

The utility model provides a garment steamer circuit which comprises a power circuit, a control circuit, a boiler heating circuit and a water pump circuit. The control circuit is used for controlling the boiler heating circuit and the water pump circuit and comprises a main controller; the power supply circuit provides alternating current for the boiler heating circuit and the water pump circuit and provides a direct current working power supply for the main processor; the direct-current working power supply comprises a voltage-regulator tube ZD1, a rectifier diode D1 and an electrolytic capacitor EC1; the positive electrode and the negative electrode of the voltage-regulator tube ZD1 are respectively connected with an L phase line and an N phase line of the mains supply; the cathode of the rectifier diode D1 is connected with the anode of the voltage-regulator tube ZD1, the anode of the rectifier diode D1 is connected with the cathode of the electrolytic capacitor EC1, and the anode of the electrolytic capacitor EC1 is connected with the cathode of the voltage-regulator tube ZD1. According to the utility model, the voltage stabilizing diode is adopted to reduce the voltage, the voltage of 220 VAC or 110 VAC can be stabilized at 5 V by the 5 V voltage stabilizing diode, and then rectification and filtering are carried out to form a + 5 V power supply.

Description

Technical Field

[0001] This utility model relates to the field of steam garment steamers, and in particular to a steam garment steamer circuit, the power supply of which can adapt to different mains voltages. Background Technology

[0002] A garment steamer (also called a hanging iron or standing iron) is a machine that can be used to iron clothes and fabrics while they are hanging. The steamer works by continuously contacting the clothes and fabrics with hot steam generated inside, softening the fibers and smoothing them through "pulling," "pressing," and "spraying" motions, leaving the clothes and fabrics looking brand new.

[0003] Garment steamers are suitable for ironing and disinfecting clothes, curtains, and carpets of any material. They are simple to use, easy to operate, and save energy and time. They are commonly used in clothing stores, hotels, and homes.

[0004] Because garment steamers are widely used and the mains power supply in their locations varies considerably, some garment steamers on the market now use power supplies suitable for a wider range of mains voltages. For example, Chinese invention patent application publication number CN117394652 A discloses a garment steamer circuit suitable for a wide voltage range. This circuit uses an input protection circuit to provide overload protection, a varistor buffer, and surge protection for the input voltage. It then uses a rectifier circuit to rectify the input voltage. A mains synchronization circuit and a mains detection circuit detect and synchronize the input voltage. A constant power numerical averaging algorithm with equal-surface cutoff waveforms is used to extract key voltage values, and the circuit is controlled via communication with the main control IC. This garment steamer circuit suitable for a wide voltage range uses a combination of hardware and software to achieve a power supply that meets the wide voltage requirements, but the circuit is complex. Utility Model Content

[0005] This invention addresses the shortcomings of current steam garment steamer circuits, which rely on a combination of hardware and software to meet wide voltage power supply requirements and suffer from complex circuitry. It provides a steam garment steamer circuit that utilizes a Zener diode for voltage regulation.

[0006] The technical solution for achieving the technical objective of this utility model is as follows: a steam garment steamer circuit, including a power supply circuit, a control circuit, a boiler heating circuit, and a water pump circuit; the control circuit controls the boiler heating circuit and the water pump circuit, and includes a main controller; the power supply circuit provides AC power to the boiler heating circuit and the water pump circuit, and provides DC power to the main processor; the DC power supply includes a Zener diode ZD1, a rectifier diode D1, and an electrolytic capacitor EC1; the positive and negative terminals of the Zener diode ZD1 are connected to the L-phase line and N-phase line of the mains power, respectively; the negative terminal of the rectifier diode D1 is connected to the positive terminal of the Zener diode ZD1, the positive terminal of the rectifier diode D1 is connected to the cathode of the electrolytic capacitor EC1, and the anode of the electrolytic capacitor EC1 is connected to the negative terminal of the Zener diode; the anode and cathode of the electrolytic capacitor EC1 form the positive and negative terminals of the DC power supply.

[0007] Furthermore, in the above-mentioned steam garment steamer circuit: the DC power supply is +5VDC; the Zener diode ZD1 is a 5V Zener diode.

[0008] Furthermore, in the aforementioned steam garment steamer circuit: in the power supply circuit, a fuse F1 is also installed on the wire connected to the L phase of the mains power.

[0009] Furthermore, in the aforementioned steam garment steamer circuit, a surge protection circuit ZNR1 is also installed between the L-phase line and the N-phase line of the mains power.

[0010] Furthermore, in the aforementioned steam garment steamer circuit: a low-pass filter circuit is also provided between the L-phase line and the N-phase line of the mains power; the low-pass filter circuit includes a filter capacitor CX and resistors RA and RB; the filter capacitor CX is located between the L-phase line and the N-phase line of the mains power, and the resistors RA and RB are connected in parallel across the filter capacitor CX.

[0011] Furthermore, in the above-mentioned steam garment steamer circuit: a high-pass filter circuit is also provided on the L-phase line of the mains power. The high-pass filter circuit includes a filter capacitor C1 and resistors R1, R2, and R3. The filter capacitor and resistor R3 are connected in series on the L-phase line of the mains power, and resistors R1 and R2 are connected in series and then connected in parallel across the two ends of the filter capacitor C1.

[0012] In this invention, a Zener diode is used to step down the voltage. Whether it is 220VAC or 110VAC, it can be stabilized at 5V by a 5V Zener diode, and then rectified and filtered to form a +5V power supply.

[0013] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Appendix Figure 1This is a block diagram of the circuit principle in Embodiment 1 of this utility model;

[0015] Appendix Figure 2 This is a schematic diagram of the power supply circuit in Embodiment 1 of this utility model;

[0016] Appendix Figure 3 This is the boiler heating control circuit in Embodiment 1 of this utility model;

[0017] Appendix Figure 4 This is the water pump control circuit in Embodiment 1 of this utility model;

[0018] Appendix Figure 5 This is a schematic diagram of the main control circuit of Embodiment 1 of this utility model. Detailed Implementation

[0019] The circuit diagram of the steam garment steamer in this embodiment is as follows: Figure 1 As shown, it mainly includes a power supply circuit connected to the mains power, a main control circuit for the garment steamer, a boiler heating control circuit, and a water pump circuit. The main control circuit is powered by DC power from the power supply circuit, while the boiler heating circuit and water pump circuit are powered by AC power from the mains power supply circuit. The main control circuit uses the boiler heating control circuit and water pump control circuit to control the boiler heating and the water pump operation. The main control circuit generates two control signals, HEATER and PUMP, which, along with the boiler heating control circuit and water pump control circuit, control the boiler heating and the water pump spraying.

[0020] In this embodiment, the power supply circuit is adaptable to various power sources. For example, my country's mains power is 50Hz 220VAC, while the mains power in countries like the United States is 60Hz 110VAC. Both types of mains power can be used to power the garment steamer in this embodiment, making it suitable for travel use regardless of the mains power specifications. Therefore, this embodiment uses a power supply circuit that is compatible with multiple voltages. This power supply circuit not only provides surge protection and noise filtering but also generates a stable DC power supply to the main control circuit, providing a stable 5VDC power supply to the main processor.

[0021] like Figure 2As shown, in this embodiment, the power supply circuit includes a DC power supply, which includes a Zener diode ZD1, a rectifier diode D1, and an electrolytic capacitor EC1. The positive and negative terminals of the Zener diode ZD1 are connected to the L-phase and N-phase lines of the mains power, respectively. The negative terminal of the rectifier diode D1 is connected to the positive terminal of the Zener diode ZD1, and the positive terminal of the rectifier diode D1 is connected to the cathode of the electrolytic capacitor EC1. The anode of the electrolytic capacitor EC1 is connected to the negative terminal of the Zener diode. The anode and cathode of the electrolytic capacitor EC1 form the positive and negative terminals of the DC power supply. In this embodiment, when the voltage exceeds the breakdown voltage of the Zener diode ZD1, the Zener diode ZD1 breaks down, and all high voltage is shielded. Thus, whether it is 220VAC or 110VAC, the Zener diode ZD1 can break down, generating a stable voltage output. In this embodiment, the DC power supply is +5VDC; therefore, the Zener diode ZD1 is a 5V Zener diode. If the voltage exceeds 5V, the Zener diode ZD1 will break down.

[0022] In addition, in the power supply circuit of this embodiment, a fuse F1 is also installed on the wire connected to the L phase of the mains power. A surge protection circuit ZNR1 is also installed between the L phase and N phase lines of the mains power. A low-pass filter circuit is also installed between the L phase and N phase lines of the mains power; the low-pass filter circuit includes a filter capacitor CX and resistors RA and RB; the filter capacitor CX is placed between the L phase and N phase lines of the mains power, and resistors RA and RB are connected in parallel across the filter capacitor CX. A high-pass filter circuit is also installed on the L phase line of the mains power, the high-pass filter circuit includes a filter capacitor C1 and resistors R1, R2, and R3; the filter capacitor and resistor R3 are connected in series on the L phase line of the mains power, and resistors R1 and R2 are connected in series and then in parallel across the filter capacitor C1. The two filters can filter out high-frequency noise and low-frequency noise in the power supply.

[0023] Boiler heating control circuit, such as Figure 3 As shown, THERMAL SW is the trip switch on the boiler, and TH_SW is the trip switch closing and opening signal, used to detect whether the trip switch is open, facilitating water flow adjustment and preventing intermittent mist output. Here, "trip switch" means the action is closed and opened, essentially a protective switch. TH_SW is connected to the main controller in the main control circuit. The control signal HEATER generated by the main control circuit controls the SCR2 to control whether the boiler is powered on. A bidirectional diode D3 is used here to protect the main control circuit, shielding it from voltages higher than 5V. Plug J03 connects to the boiler's power input terminal, introducing the L phase of the power supply to the positive terminal of the boiler heater. The negative terminal of the boiler heater is controlled by the SCR2 to connect to the +5V power supply. Here, the 5V power supply and the ACN neutral line are the same line and cannot be connected to ground.

[0024] Water pump control circuit such as Figure 4As shown, similar to the boiler heating control circuit, a SCR1 (Silicon Controlled Rectifier) ​​is used to switch the water pump power. The main controller generates a PUMP signal to control whether the SCR1 conducts and connects to 5VDC. Simultaneously, sampling is performed: AC_zero is the zero-point signal sample, and AC -Volt is the input voltage detection sample. Similarly, J02 connects to the water pump's power input; one connector connects to phase ACL1 of the mains power, and the other, under the control of the SCR1, connects to a +5V power supply. Here, the 5V power supply and the ACN neutral line are the same line and cannot be connected to ground. The main controller's PUMP signal controls the SCR1.

[0025] By detecting the input, it is confirmed whether the input is 120V or 220V. The boiler power is controlled by chopping or drop-out control methods, and the water pump flow is controlled at the same time to achieve stable steam control.

[0026] Here, chopping is used to control power. As a power electronics technology, it is mainly used to change the level of DC voltage. Its basic working principle is to convert the input DC power into adjustable DC power by rapidly turning power semiconductor switches (such as transistors or IGBTs).

[0027] Choppers have two main operating modes: Pulse Width Modulation (PWM) and Frequency Modulation (FM). In PWM mode, the period Ts remains constant while the switching on-time Ton is changed, which alters the duty cycle of the PWM signal. In FM mode, Ton remains constant while the period Ts is changed. Both modes can effectively control the output voltage.

[0028] There are several basic types of chopper circuits, including buck chopper circuits, boost chopper circuits, buck-boost chopper circuits, and Cuk chopper circuits. Each type of chopper circuit has its specific voltage conversion capability and application scenarios.

[0029] Wavelet dropping is a method used in AC load control to control power by discarding a certain half-wave.

[0030] In this embodiment, the AC_zero zero-point signal sampling utilizes a bidirectional diode D03 to shield voltages higher than 5V, thus protecting the main processor. Similarly, the AC-Volt input voltage detection sampling signal is also input to the main processor. When the voltage is higher than 5V, the input signal to the main processor is 5V; only when the voltage is lower than 5V is the actual voltage input to the main processor.

[0031] like Figure 5 The diagram shows the main control circuit, which is controlled by a single chip, U1.

Claims

1. A steam garment steamer circuit, comprising a power supply circuit and a control circuit, a boiler heating circuit, and a water pump circuit; the control circuit controls the boiler heating circuit and the water pump circuit, and the control circuit includes a main controller; the power supply circuit provides AC power to the boiler heating circuit and the water pump circuit, and provides DC power to the main processor; characterized in that: The DC power supply includes a Zener diode ZD1, a rectifier diode D1, and an electrolytic capacitor EC1. The positive and negative terminals of the Zener diode ZD1 are connected to the L-phase line and N-phase line of the mains power, respectively. The negative terminal of the rectifier diode D1 is connected to the positive terminal of the Zener diode ZD1, and the positive terminal of the rectifier diode D1 is connected to the cathode of the electrolytic capacitor EC1. The anode of the electrolytic capacitor EC1 is connected to the negative terminal of the Zener diode. The anode and cathode of the electrolytic capacitor EC1 form the positive and negative terminals of the DC power supply.

2. The steam garment steamer circuit according to claim 1, characterized in that: The DC operating power supply is +5VDC; the Zener diode ZD1 is a 5V Zener diode.

3. The steam garment steamer circuit according to claim 1, characterized in that: In the power supply circuit, a fuse F1 is also installed on the wire connected to the L phase of the mains power.

4. The steam garment steamer circuit according to claim 3, characterized in that: A surge protection circuit ZNR1 is also installed between the L-phase line and the N-phase line of the mains power supply.

5. The steam garment steamer circuit according to claim 4, characterized in that: A low-pass filter circuit is also provided between the L-phase line and the N-phase line of the mains power supply; the low-pass filter circuit includes a filter capacitor CX and resistors RA and RB; the filter capacitor CX is placed between the L-phase line and the N-phase line of the mains power supply, and the resistors RA and RB are connected in parallel across the filter capacitor CX.

6. The steam garment steamer circuit according to claim 4, characterized in that: A high-pass filter circuit is also provided on the L-phase line of the mains power. The high-pass filter circuit includes a filter capacitor C1 and resistors R1, R2, and R3. The filter capacitor and resistor R3 are connected in series on the L-phase line of the mains power, and resistors R1 and R2 are connected in series and then in parallel across the two ends of the filter capacitor C1.

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