A garment steamer control circuit

Abstract

The utility model discloses a kind of garment steamer control circuit, including commercial power input, zero-crossing detection module, power module, steam control module, water pump control module, temperature detection module and intelligent control chip, the intelligent control chip is connected with the steam control module, the water pump control module and the temperature detection module respectively, the commercial power input is connected with the zero-crossing detection module, the zero-crossing detection module is connected with the intelligent control chip. In the technical scheme, the zero-crossing detection module is arranged on the power module side of garment steamer control circuit, the zero-crossing detection module is connected with commercial power input to detect the zero-crossing point of alternating commercial power, and the intelligent control chip accurately controls water pump control module and steam control module according to the signal transmitted by zero-crossing detection module, to improve the safety and reliability in the use process of garment steamer, reduce the risk of failure.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and more specifically to a control circuit for a garment steamer. Background Technology

[0002] Garment steamers are common household appliances. They work by continuously contacting clothes and fabrics with hot water steam generated inside, softening the fibers and smoothing the fabrics through "pulling," "pressing," and "spraying" motions, leaving them looking brand new.

[0003] Existing garment steamers are mainly equipped with a power module, a steam control module, a water pump control module, a button module, and a temperature detection module. In terms of safety detection, the internal intelligent control chip uses the temperature detection module to determine whether the garment steamer is overheating during use. If overheating occurs, the intelligent control chip controls the steam control module and water pump control module to stop running or directly disconnects from the power module. This results in poor reliability and safety, failing to provide further safety protection for users. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a control circuit for a garment steamer.

[0005] The technical solution adopted by this utility model to solve the problem is:

[0006] A garment steamer control circuit includes an AC power input terminal, a power module, a steam control module, a water pump control module, a temperature detection module, and an intelligent control chip. The AC power input terminal is connected to the power module. The power module is connected to the steam control module, the water pump control module, the temperature detection module, and the intelligent control chip. The intelligent control chip is connected to the steam control module, the water pump control module, and the temperature detection module.

[0007] The garment steamer control circuit also includes a zero-crossing detection module, the mains power input terminal is connected to the zero-crossing detection module, and the zero-crossing detection module is connected to the intelligent control chip.

[0008] As a further improvement to the above technical solution, the power module includes an AC-to-DC circuit, a varistor RV, a safety capacitor CX, a fuse resistor RA1, and a fuse resistor RA2. The mains input terminal is equipped with a live wire connection terminal and a neutral wire connection terminal. The neutral wire connection terminal is connected to one end of the fuse resistor RA1, and the live wire connection terminal is connected to one end of the fuse resistor RA2. The other end of the resistor RA1 is connected to the other end of the fuse resistor RA2 through the varistor RV. The safety capacitor CX is connected in parallel with the varistor RV, and both ends of the safety capacitor CX are respectively connected to the AC-to-DC circuit, which supplies power to the outside.

[0009] As a further improvement to the above technical solution, the AC-to-DC circuit is a non-isolated step-down switching power supply circuit.

[0010] As a further improvement to the above technical solution, the AC to DC circuit includes a power chip of model KP311, resistors R1, R2, R3, and R4, inductors L1 and L2, capacitors C1, C2, and C3. The power chip is configured with seven pins, which are defined as pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, and pin 7, respectively.

[0011] One end of the safety capacitor CX is connected to the other end of the safety capacitor CX via resistors R1, R2, and R3. The first pin of the power chip is connected to the junction of resistor R3 and the safety capacitor CX. The seventh pin of the power chip is connected to the junction of resistor R1 and the safety capacitor CX. The second pin of the power chip is connected to the third pin of the power chip via inductor L2. The third pin of the power chip is connected to the first pin of the power chip via capacitor C2. The fourth pin of the power chip is connected to the first pin of the power chip via capacitor C3. The fourth pin of the power chip is connected to the sixth pin of the power chip via inductor L1. The sixth pin of the power chip is connected to the fifth pin of the power chip via capacitor C1. One end of resistor R4 is connected to the fourth pin of the power chip. The other end of resistor R4 is connected to the junction of resistor R3 and the safety capacitor CX. The fourth pin of the power chip supplies power externally and is connected to ground via capacitor C3.

[0012] As a further improvement to the above technical solution, the zero-crossing detection module includes resistors R5, R6, and R7, diode D1, and diode D2. The intelligent control chip is configured with a first connection terminal. The neutral wire connection terminal of the mains input terminal is connected to one end of resistor R5 through the fuse resistor RA1. The other end of resistor R5 is connected to the first connection terminal of the intelligent control chip through resistors R6 and R7. The negative terminal of diode D1 is connected to the AC-to-DC circuit, the positive terminal of diode D1 is connected to the negative terminal of diode D2, the positive terminal of diode D1 is connected to the first connection terminal of the intelligent control chip, and the positive terminal of diode D2 is connected to ground.

[0013] As a further improvement to the above technical solution, the temperature detection module includes a sensor port for connecting to the temperature sensor, resistors R8 and R9, and capacitor C4. The intelligent control chip is configured with a second connection terminal, and the sensor port is configured with a power terminal and a data terminal.

[0014] The power supply terminal of the sensor port is connected to the power module, the data terminal of the sensor port is connected to the second connection terminal of the intelligent control chip through the resistor R9, the data terminal of the sensor port is connected to the ground terminal through the resistor R8, and the capacitor C4 is connected in parallel with the resistor R8.

[0015] As a further improvement to the above technical solution, the water pump control module includes resistor R10, resistor R11, bidirectional thyristor D3, and water pump port. The intelligent control chip is equipped with a third connection terminal. The third connection terminal of the intelligent control chip is connected to the control electrode of the bidirectional thyristor D3 through resistor R10. The control electrode of the bidirectional thyristor D3 is connected to the power supply module through resistor R11. The first anode of the bidirectional thyristor D3 is connected to the water pump port, and the second anode of the bidirectional thyristor D3 is connected to the mains input terminal.

[0016] As a further improvement to the above technical solution, the steam control module includes a connection port, resistors R12 and R13, diode D4, PNP transistor Q1, and a relay. The intelligent control chip is equipped with a fourth connection terminal, which is connected to the base of transistor Q1 through resistor R13. The emitter of transistor Q1 is connected to the power supply module. The two ends of resistor R12 are connected to the base and emitter of transistor Q1 respectively. The collector of transistor Q1 is connected to the negative terminal of diode D4. The anode of diode D4 is connected to ground. The anode of diode D4 is connected to one end of the input circuit of the relay. The cathode of diode D4 is connected to the other end of the input circuit of the relay. One end of the output circuit of the relay is connected to the mains input terminal. The other end of the output circuit of the relay is connected to the connection port.

[0017] As a further improvement to the above technical solution, the relay is a PTC relay.

[0018] As a further improvement to the above technical solution, the model of the intelligent control chip is HC89M301D.

[0019] The beneficial effects of this utility model are as follows: In this technical solution, the control circuit of the garment steamer is equipped with a zero-crossing detection module on the power module side. The zero-crossing detection module is connected to the mains power input terminal to detect the zero-crossing point of the AC mains power. The intelligent control chip performs precise control of the water pump control module and the steam control module according to the signal transmitted by the zero-crossing detection module, so as to improve the safety and reliability of the garment steamer during use and reduce the risk of failure. Attached Figure Description

[0020] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a circuit module framework diagram of this utility model;

[0022] Figure 2 This is a circuit diagram of the power supply module and the zero-crossing detection module in this utility model;

[0023] Figure 3 This is the circuit diagram of the temperature detection module in this utility model;

[0024] Figure 4 This is the circuit diagram of the water pump control module in this utility model;

[0025] Figure 5 This is the circuit diagram of the steam control module in this utility model. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 5 This application discloses a control circuit for a garment steamer. In its first embodiment, it includes a mains power input terminal, a power module, a steam control module, a water pump control module, a temperature detection module, and an intelligent control chip of model HC89M301D. The mains power input terminal is connected to the power module. The power module is connected to the steam control module, the water pump control module, the temperature detection module, and the intelligent control chip. The intelligent control chip is connected to the steam control module, the water pump control module, and the temperature detection module.

[0031] The garment steamer control circuit also includes a zero-crossing detection module, the mains power input terminal is connected to the zero-crossing detection module, and the zero-crossing detection module is connected to the intelligent control chip.

[0032] Specifically, in this embodiment, the garment steamer control circuit is equipped with a zero-crossing detection module on the power module side. The zero-crossing detection module is connected to the AC mains input terminal to detect the zero-crossing point of the AC mains power. The intelligent control chip performs precise control of the water pump control module and the steam control module based on the signal transmitted by the zero-crossing detection module, so as to improve the safety and reliability of the garment steamer during use and reduce the risk of malfunction.

[0033] As a further preferred embodiment, in this embodiment, the power module includes an AC-to-DC circuit, a varistor RV, a safety capacitor CX, a fuse resistor RA1, and a fuse resistor RA2. The mains input terminal is configured with a live wire connection terminal and a neutral wire connection terminal. The neutral wire connection terminal is connected to one end of the fuse resistor RA1, and the live wire connection terminal is connected to one end of the fuse resistor RA2. The other end of the resistor RA1 is connected to the other end of the fuse resistor RA2 through the varistor RV. The safety capacitor CX is connected in parallel with the varistor RV, and both ends of the safety capacitor CX are respectively connected to the AC-to-DC circuit, which supplies power to the outside.

[0034] As a further preferred embodiment, in this embodiment, the AC-to-DC circuit is a non-isolated step-down switching power supply circuit. Specifically, the AC-to-DC circuit includes a power chip of model KP311, resistors R1, R2, R3, and R4, inductors L1 and L2, capacitors C1, C2, and C3. The power chip is configured with seven pins, which are defined as pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, and pin 7.

[0035] One end of the safety capacitor CX is connected to the other end of the safety capacitor CX via resistors R1, R2, and R3. The first pin of the power chip is connected to the junction of resistor R3 and the safety capacitor CX. The seventh pin of the power chip is connected to the junction of resistor R1 and the safety capacitor CX. The second pin of the power chip is connected to the third pin of the power chip via inductor L2. The third pin of the power chip is connected to the first pin of the power chip via capacitor C2. The fourth pin of the power chip is connected to the first pin of the power chip via capacitor C3. The fourth pin of the power chip is connected to the sixth pin of the power chip via inductor L1. The sixth pin of the power chip is connected to the fifth pin of the power chip via capacitor C1. One end of resistor R4 is connected to the fourth pin of the power chip. The other end of resistor R4 is connected to the junction of resistor R3 and the safety capacitor CX. The fourth pin of the power chip supplies power externally and is connected to ground via capacitor C3.

[0036] As a further preferred embodiment, in this embodiment, the zero-crossing detection module includes resistors R5, R6, and R7, diode D1, and diode D2. The intelligent control chip is configured with a first connection terminal. The neutral wire connection terminal of the mains input terminal is connected to one end of resistor R5 through the fuse resistor RA1. The other end of resistor R5 is connected to the first connection terminal of the intelligent control chip through resistors R6 and R7. The negative terminal of diode D1 is connected to the AC-to-DC circuit, the positive terminal of diode D1 is connected to the negative terminal of diode D2, the positive terminal of diode D1 is connected to the first connection terminal of the intelligent control chip, and the positive terminal of diode D2 is connected to ground.

[0037] As a further preferred embodiment, in this embodiment, the temperature detection module includes a sensor port for connecting to a temperature sensor, resistors R8 and R9, and capacitor C4. The intelligent control chip is configured with a second connection terminal, and the sensor port is configured with a power terminal and a data terminal.

[0038] The power supply terminal of the sensor port is connected to the power module, the data terminal of the sensor port is connected to the second connection terminal of the intelligent control chip through the resistor R9, the data terminal of the sensor port is connected to the ground terminal through the resistor R8, and the capacitor C4 is connected in parallel with the resistor R8.

[0039] As a further preferred embodiment, in this embodiment, the water pump control module includes resistor R10, resistor R11, bidirectional thyristor D3, and a water pump port. The intelligent control chip is configured with a third connection terminal. The third connection terminal of the intelligent control chip is connected to the control electrode of the bidirectional thyristor D3 through resistor R10. The control electrode of the bidirectional thyristor D3 is connected to the power supply module through resistor R11. The first anode of the bidirectional thyristor D3 is connected to the water pump port, and the second anode of the bidirectional thyristor D3 is connected to the mains input terminal.

[0040] As a further preferred embodiment, in this embodiment, the steam control module includes a connection port, resistors R12 and R13, diode D4, PNP transistor Q1, and a relay. The intelligent control chip is configured with a fourth connection terminal, which is connected to the base of transistor Q1 through resistor R13. The emitter of transistor Q1 is connected to the power supply module. The two ends of resistor R12 are connected to the base and emitter of transistor Q1 respectively. The collector of transistor Q1 is connected to the cathode of diode D4. The anode of diode D4 is connected to ground. The anode of diode D4 is connected to one end of the input circuit of the relay. The cathode of diode D4 is connected to the other end of the input circuit of the relay. One end of the output circuit of the relay is connected to the mains input terminal, and the other end of the output circuit of the relay is connected to the connection port.

[0041] Preferably, in this embodiment, the relay is a PTC relay, which utilizes the characteristics of a positive temperature coefficient thermistor to achieve start-up control. During start-up, the PTC element is at room temperature with low resistance, allowing the starting winding to carry a large current to generate the necessary starting torque. When the element temperature rises to a critical point, the resistance increases sharply, cutting off the starting winding current. This embodiment uses a PTC relay to control steam generation, providing overheat protection and further improving the safety of the garment steamer during use.

[0042] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A control circuit for a garment steamer, characterized in that: It includes an AC power input terminal, a power module, a steam control module, a water pump control module, a temperature detection module, and an intelligent control chip. The AC power input terminal is connected to the power module. The power module is connected to the steam control module, the water pump control module, the temperature detection module, and the intelligent control chip. The intelligent control chip is connected to the steam control module, the water pump control module, and the temperature detection module. The garment steamer control circuit also includes a zero-crossing detection module, the mains power input terminal is connected to the zero-crossing detection module, and the zero-crossing detection module is connected to the intelligent control chip.

2. The garment steamer control circuit according to claim 1, characterized in that: The power module includes an AC-to-DC circuit, a varistor RV, a safety capacitor CX, a fuse resistor RA1, and a fuse resistor RA2. The AC input terminal is equipped with a live wire connection terminal and a neutral wire connection terminal. The neutral wire connection terminal is connected to one end of the fuse resistor RA1, and the live wire connection terminal is connected to one end of the fuse resistor RA2. The other end of the resistor RA1 is connected to the other end of the fuse resistor RA2 through the varistor RV. The safety capacitor CX is connected in parallel with the varistor RV, and both ends of the safety capacitor CX are connected to the AC-to-DC circuit. The AC-to-DC circuit supplies power to the external circuit.

3. The garment steamer control circuit according to claim 2, characterized in that: The AC-to-DC circuit is a non-isolated step-down switching power supply circuit.

4. The garment steamer control circuit according to claim 3, characterized in that: The AC-to-DC circuit includes a power chip of model KP311, resistors R1, R2, R3, and R4, inductors L1 and L2, capacitors C1, C2, and C3. The power chip is configured with seven pins, which are defined as pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, and pin 7. One end of the safety capacitor CX is connected to the other end of the safety capacitor CX via resistors R1, R2, and R3. The first pin of the power chip is connected to the junction of resistor R3 and the safety capacitor CX. The seventh pin of the power chip is connected to the junction of resistor R1 and the safety capacitor CX. The second pin of the power chip is connected to the third pin of the power chip via inductor L2. The third pin of the power chip is connected to the first pin of the power chip via capacitor C2. The fourth pin of the power chip is connected to the first pin of the power chip via capacitor C3. The fourth pin of the power chip is connected to the sixth pin of the power chip via inductor L1. The sixth pin of the power chip is connected to the fifth pin of the power chip via capacitor C1. One end of resistor R4 is connected to the fourth pin of the power chip. The other end of resistor R4 is connected to the junction of resistor R3 and the safety capacitor CX. The fourth pin of the power chip supplies power externally and is connected to ground via capacitor C3.

5. The garment steamer control circuit according to claim 2, characterized in that: The zero-crossing detection module includes resistors R5, R6, and R7, diode D1, and diode D2. The intelligent control chip is equipped with a first connection terminal. The neutral wire connection terminal of the mains input terminal is connected to one end of resistor R5 through the fuse resistor RA1. The other end of resistor R5 is connected to the first connection terminal of the intelligent control chip through resistors R6 and R7. The negative terminal of diode D1 is connected to the AC-to-DC circuit, the positive terminal of diode D1 is connected to the negative terminal of diode D2, the positive terminal of diode D1 is connected to the first connection terminal of the intelligent control chip, and the positive terminal of diode D2 is connected to ground.

6. The control circuit for a garment steamer according to claim 1, characterized in that: The temperature detection module includes a sensor port for connecting to a temperature sensor, resistors R8 and R9, and capacitor C4. The intelligent control chip is equipped with a second connection terminal, and the sensor port is equipped with a power terminal and a data terminal. The power supply terminal of the sensor port is connected to the power module, the data terminal of the sensor port is connected to the second connection terminal of the intelligent control chip through the resistor R9, the data terminal of the sensor port is connected to the ground terminal through the resistor R8, and the capacitor C4 is connected in parallel with the resistor R8.

7. The garment steamer control circuit according to claim 1, characterized in that: The water pump control module includes resistors R10 and R11, a bidirectional thyristor D3, and a water pump port. The intelligent control chip is equipped with a third connection terminal. The third connection terminal of the intelligent control chip is connected to the control electrode of the bidirectional thyristor D3 through resistor R10. The control electrode of the bidirectional thyristor D3 is connected to the power supply module through resistor R11. The first anode of the bidirectional thyristor D3 is connected to the water pump port, and the second anode of the bidirectional thyristor D3 is connected to the mains input terminal.

8. The garment steamer control circuit according to claim 1, characterized in that: The steam control module includes a connection port, resistors R12 and R13, diode D4, transistor Q1, and a relay. The intelligent control chip is equipped with a fourth connection terminal, which is connected to the base of transistor Q1 through resistor R13. The emitter of transistor Q1 is connected to the power supply module. The two ends of resistor R12 are connected to the base and emitter of transistor Q1 respectively. The collector of transistor Q1 is connected to the cathode of diode D4. The anode of diode D4 is connected to ground. The anode of diode D4 is connected to one end of the input circuit of the relay, and the cathode of diode D4 is connected to the other end of the input circuit of the relay. One end of the output circuit of the relay is connected to the mains input terminal, and the other end of the output circuit of the relay is connected to the connection port.

9. A garment steamer control circuit according to claim 8, characterized in that: The relay is a PTC relay.

10. A garment steamer control circuit according to claim 1, characterized in that: The model number of the intelligent control chip is HC89M301D.

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