Travel steam iron suitable for different voltages in different countries.

Abstract

This invention discloses a travel-sized steam iron suitable for different voltages in different countries. It includes a housing with a heat sink at the top inner part and a water tank at the bottom. A DC water pump is located on one side of the water tank, and a PCB board with a voltage recognition and control circuit is mounted on the top of the pump. A heat insulation cover is located at the bottom of the water tank, and a heating steam chamber is located at the top inner part of the heat insulation cover. An iron soleplate is located at the bottom of the heating steam chamber. Several annular steam nozzles are located in the center of the soleplate, and an adsorption component is located on the outer bottom of the soleplate. This invention not only improves the steam release speed and uniformity, effectively reducing ironing time and increasing ironing efficiency, but also stabilizes the power of the steam iron within a rated value under any voltage, making it suitable for global voltages and better meeting the user's needs in different environments.

Description

Technical Field

[0001] This invention relates to the field of ironing technology, and more specifically, to a quick-ironing travel steam iron suitable for different voltages in different countries. Background Technology

[0002] Steam irons are typically used for light ironing of clothing, such as shirts, trousers, and skirts. They work by heating water to produce steam, which is then released through holes in the iron to iron the garment. Because steam irons are generally smaller and lighter than traditional irons, they are more suitable for travel. However, traditional steam irons use simple steam nozzles, resulting in slow ironing speeds. Therefore, a faster steam iron is needed to overcome this problem.

[0003] For example, Chinese patent application number CN202123454317.7 discloses a portable steam ironing device, including a casing, a mounting groove on the front side of the casing, a steam generator installed inside the casing on the back side of the mounting groove, a water tank embedded in the mounting groove, an iron connected to the top of the casing via a hose, and a slot on the top edge of the back side of the casing for inserting an iron holder. This steam ironing device features a reasonable space occupation, easy storage, compact size, and convenient use.

[0004] For example, Chinese patent application number CN201710685874.9 discloses a portable ironing machine, which consists of an outer cover, a water inlet channel, a longitudinal air duct, a water tank, a water inlet, an air outlet, a heating layer, a connecting block, a transverse air duct, a heating wire, an ironing head, a steam channel, and a steam nozzle. This portable ironing machine has the advantages of being compact and easy to carry, and can be used as both a garment steamer and an iron.

[0005] However, since the aforementioned steam ironing equipment all use simple steam nozzles to release steam, the steam is only propelled by subsequent steam as it flows from the water tank to the nozzle. Only when the subsequent steam reaches the current steam's position can the current steam continue to flow forward until it is released from the nozzle. However, this method of steam release results in a slow steam release rate, which not only increases the time the steam stays on the clothes during ironing, preventing the moisture on the clothing surface from being quickly absorbed and diffused by the heat, making it difficult to fully wet and iron the clothes, resulting in low ironing efficiency, but also may cause steam to accumulate in a certain area during ironing, resulting in excessive water stains in that area, thus affecting the ironing effect.

[0006] Furthermore, for steam irons used by travelers, the most common type on the market is the dual-heating-tube type equipped with a power conversion switch. However, due to the different voltage levels of the power grid in different countries, traditional steam irons are extremely inconvenient for consumers. For example, when using a 220V country, if the consumer forgets to switch the switch to 220V, the machine will still be in 120V mode. If a 220V power supply is plugged in at this time, the power of the machine will instantly rise to a very high level, which can easily burn out the steam iron and cause dangerous injury to the user.

[0007] There are currently no effective solutions to the problems in the relevant technologies. Summary of the Invention

[0008] In response to the problems in related technologies, this invention proposes a quick-ironing travel steam iron suitable for different voltages in different countries, thereby overcoming the aforementioned technical problems existing in the existing related technologies.

[0009] Therefore, the specific technical solution adopted by the present invention is as follows:

[0010] This travel-sized steam iron, suitable for different voltages in different countries, includes a casing with a front cover and a rear cover. A lifting handle is located on the top of the casing. A heat sink is located at the top inner part of the casing, with a water tank at the bottom. A DC water pump is located on one side of the water tank, and a PCB board with voltage recognition and control circuitry is located on the top of the pump. A heat insulation cover is located at the bottom of the water tank, with a heating steam chamber at the top inner part of the cover. An iron soleplate is located at the bottom of the heating steam chamber. Several annular steam nozzles that mate with the heating steam chamber are perforated through the center of the iron soleplate, and an adsorption assembly is located at the bottom of the iron soleplate, outside the annular steam nozzles.

[0011] Furthermore, to provide some protection for the wires, a wire sheath is provided on one side of the bottom of the housing. Both the front and rear covers have anti-slip textures, and a switch button is located on the surface of the front cover. To facilitate the movement of the lifting handle, slide rails that mate with the lifting handle are provided on both sides of the inner top of the housing, and heat sinks are installed between the tops of the slide rails.

[0012] Furthermore, to facilitate the identification of different regional power grid voltages and the adjustment of output power, the voltage identification and control circuit includes a fuse F1, resistors R0, R1, R2, R3, R4, R6, and R13, a heating wire RL, a sampling resistor RS, diodes D1 and D4, a thyristor TR1, filter capacitors EC1 and EC2, a capacitor C5, an inductor L1, an optocoupler PT1, a power chip U1, and a microcontroller U2; one end of the fuse F1 is connected to the heating wire... One end of the wire L and one end of the heating wire RL are connected. The other end of the fuse F1 is connected to one end of the resistor R0 and the positive terminal of the diode D1. The other end of the resistor R0 is connected to the negative terminal of the diode D4 and the ZERO terminal of the microcontroller U2. The positive terminal of the diode D4 is connected to the neutral line N, one end of the sampling resistor RS, one end of the resistor R2, the negative terminal of the filter capacitor EC1, the second pin of the power chip U1, the negative terminal of the filter capacitor EC2, one end of the resistor R13, and one end of the capacitor C5 and grounded. The diode D1... The negative terminal is connected to one end of resistor R1, the positive terminal of filter capacitor EC1, and the fourth pin of power chip U1. The other end of resistor R1 is connected to the other end of resistor R2 and the V-TECT terminal of microcontroller U2. The first pin of power chip U1 is connected to one end of inductor L1, the positive terminal of filter capacitor EC2, the other end of resistor R13, the other end of capacitor C5, and the first pin of optocoupler PT1. The other end of inductor L1 is connected to the fifth and sixth pins of power chip U1. The second pin of optocoupler PT1 is connected to one end of resistor R3. The other end of resistor R3 is connected to the PW1 terminal of microcontroller U2. The fourth pin of optocoupler PT1 is connected to the gate of thyristor TR1. The anode of thyristor TR1 is connected to one end of resistor R6 and the other end of heating wire RL. The other end of resistor R6 is connected to the sixth pin of optocoupler PT1. The cathode of thyristor TR1 is connected to the other end of sampling resistor RS and one end of resistor R4. The other end of resistor R4 is connected to the current sampling terminal IS of microcontroller U2.

[0013] Furthermore, to effectively reduce costs and stabilize performance, a single electric heating tube heater is installed inside the heating steam chamber. A temperature fuse is installed on one side of the top of the heating steam chamber, and a water inlet is installed on the side of the temperature fuse. A temperature sensor is installed on the side of the water inlet away from the temperature fuse. The PCB board is electrically connected to the DC water pump, the single electric heating tube heater, the temperature fuse, and the temperature sensor via wires.

[0014] Furthermore, in order to facilitate a sealed connection between the heating steam chamber and the iron soleplate, a positioning groove that mates with the heating steam chamber is vertically installed on the top of the iron soleplate, and several connecting posts are installed on the outer layer of the positioning groove.

[0015] Furthermore, to accelerate the steam release rate and increase the speed at which steam enters the inner steam chamber, the annular steam nozzle assembly includes several annular steam nozzles formed on the iron soleplate, with the inner diameter of each annular steam nozzle gradually decreasing from the outside to the inside. A steam chamber is formed inside each annular steam nozzle, and a steam inlet corresponding to the steam chamber is formed on one side of the middle of the annular steam nozzle. An annular baffle is inclinedly arranged inside the steam chamber, with an arc-shaped portion at the top of the annular baffle. The annular baffle divides the steam chamber into an inlet chamber and an outlet chamber located inside the inlet chamber, with the inlet chamber communicating with the steam inlet. A concentrator is formed between the top of the outlet chamber and the annular baffle. The annular baffle is inclined from bottom to top from the inlet chamber towards the outlet chamber. Several through holes are formed annularly in the middle of the inner wall of the annular steam nozzle, and the through holes are located below the concentrator; the diameter of the through holes is smaller than the diameter of the steam inlet.

[0016] Furthermore, in order to achieve an adsorption effect on clothing and facilitate ironing, the adsorption component includes an adsorption chamber inside the iron soleplate, and a negative pressure port connected to the adsorption chamber is provided on the bottom outer side of the iron soleplate. An air pump that cooperates with the adsorption chamber is provided on the top side of the iron soleplate.

[0017] The beneficial effects of this invention are as follows:

[0018] 1) By incorporating annular steam nozzle components, steam in the heating steam chamber enters several annular steam nozzles under mutual compression. The steam released is accelerated by the steam inlet chamber and the concentrator nozzle. This causes the rapidly flowing steam from the concentrator nozzle to be released along the inner wall of the funnel-shaped steam outlet chamber under the Coanda effect, forming several sets of rapidly flowing annular steam streams with gradually decreasing inner diameters. Compared to traditional steam nozzle release methods, this invention accelerates the steam release, effectively improving its speed and uniformity. This not only effectively prevents steam from remaining on clothing for too long due to slow release, making it easier to fully wet and iron, thus improving ironing efficiency, but also effectively prevents steam from accumulating in a certain area during ironing, thus avoiding excessive water stains and ensuring a better ironing effect.

[0019] 2) By incorporating several annular steam nozzles with gradually decreasing sizes, the through holes on the inner wall of the outer annular steam nozzles can provide traction for the steam to enter the inner annular steam nozzles, thereby effectively increasing the speed at which steam enters the inner steam chamber. This effectively reduces ironing time, improves the ironing efficiency of the steam iron, and better meets the user's needs in different environments.

[0020] 3) By setting up an adsorption component, the air pump can extract the air in the adsorption chamber and form a negative pressure, so that the negative pressure port can adsorb the clothes under the action of negative pressure, thus facilitating the ironing of the clothes.

[0021] 4) By incorporating a voltage recognition and control circuit, consumers can use the steam iron directly in any country, region, and under any power grid voltage without additional operation or conversion, effectively avoiding dangerous situations. Currently, voltage-adjustable irons on the market can only roughly stabilize the power at a relatively reasonable value under different voltages, with significant differences in power values ​​across different voltages, failing to accurately specify the wattage. This results in inconsistent steam output from different steam irons under different voltages. However, this invention can stabilize the power of the steam iron within a rated value under any voltage, making it applicable to global voltages and effectively solving the problem of inconsistent steam output from different steam irons under different voltages.

[0022] 5) By setting a single electric heating element heater, the output power can be adjusted in conjunction with the voltage recognition and control circuit under the action of a single heating element. In this way, the power of the steam iron can be stabilized within a rated value under any voltage. Compared with traditional multi-heating elements, the present invention has the characteristics of low cost, easy assembly and stable performance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a quick-ironing travel steam iron suitable for different voltages in different countries, according to an embodiment of the present invention;

[0025] Figure 2 This is an exploded view of a travel steam iron for quick ironing, suitable for different voltages in different countries, according to an embodiment of the present invention.

[0026] Figure 3 yes Figure 2 Enlarged view of the local structure at point A;

[0027] Figure 4 This is a schematic diagram of the heating steam chamber in a quick-ironing travel steam iron with different voltages for different countries, according to an embodiment of the present invention;

[0028] Figure 5This is a bottom view of the soleplate of a travel steam iron for quick ironing, suitable for different voltages in different countries, according to an embodiment of the present invention.

[0029] Figure 6 This is a cross-sectional view of the soleplate of a travel steam iron for quick ironing, suitable for different voltages in different countries, according to an embodiment of the present invention.

[0030] Figure 7 yes Figure 6 Enlarged view of the local structure at point B;

[0031] Figure 8 This is a schematic diagram of the annular steam nozzle assembly in a quick-ironing travel steam iron suitable for different voltages in different countries, according to an embodiment of the present invention.

[0032] Figure 9 This is a cross-sectional view of the annular steam nozzle assembly in a quick-ironing travel steam iron suitable for different voltages in different countries, according to an embodiment of the present invention.

[0033] Figure 10 This is a circuit diagram of the voltage identification and control circuit in a travel steam iron for quick ironing that is suitable for different voltages in different countries, according to an embodiment of the present invention.

[0034] Figure 11 This is a schematic diagram of the control principle of the PCB board in a quick-ironing travel steam iron suitable for different voltages in different countries according to an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the operation of the heating steam chamber in a quick-ironing travel steam iron with different voltages for different countries, according to an embodiment of the present invention.

[0036] In the picture:

[0037] 1. Housing; 2. Front cover; 3. Rear cover; 4. Lifting handle; 5. Heat sink; 6. Water tank; 7. DC water pump; 8. PCB board; 9. Heat insulation cover; 10. Heating steam chamber; 11. Iron soleplate; 12. Annular steam nozzle assembly; 1201. Annular steam nozzle; 1202. Steam chamber; 1203. Steam inlet; 1204. Annular partition; 1205. Arc-shaped part; 1206. Steam inlet chamber; 1207. Steam outlet chamber; 1208. Concentrator nozzle; 1209. Through hole; 13. Adsorption assembly; 1301. Adsorption chamber; 1302. Negative pressure port; 1303. Air pump; 14. Wire sheath; 15. Switch button; 16. Slide rail; 17. Single electric heating tube heater; 18. Temperature fuse; 19. Water inlet connector; 20. Temperature sensor; 21. Positioning groove; 22. Connecting column. Detailed Implementation

[0038] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0039] According to embodiments of the present invention, a quick-ironing travel steam iron suitable for different voltages in different countries is provided.

[0040] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-3 and Figure 6 As shown, a travel steam iron suitable for global voltage according to an embodiment of the present invention includes a housing 1, a front cover 2 that matches the surface of the housing 1, a rear cover 3 that matches the rear side of the housing 1, and a lifting handle 4 that matches the top of the housing 1; a heat sink 5 is provided at the inner top of the housing 1, a water tank 6 is provided at the bottom of the heat sink 5, a DC water pump 7 is provided on one side of the water tank 6, a PCB board 8 is provided at the top of the DC water pump 7, and a voltage recognition and control circuit is provided on the PCB board 8; a heat insulation cover 9 is provided at the bottom of the water tank 6, a heating steam chamber 10 that matches the inner top of the heat insulation cover 9, and an iron soleplate 11 that matches the bottom of the heating steam chamber 10; a plurality of annular steam nozzle assemblies 12 that match the heating steam chamber 10 are provided through the middle of the iron soleplate 11, and an adsorption assembly 13 is provided at the bottom of the iron soleplate 11 and outside the annular steam nozzle assembly 12.

[0041] The steam iron connects to AC power via its PCB board 8. The switching power supply on the PCB board 8 provides a stable DC voltage to the DC water pump 7. This DC voltage remains stable regardless of changes in the mains power, ensuring the water supply unit can operate on any country's voltage. Simultaneously, it employs a single heating element, and through special calculations on the PCB board 8 and a silicon controlled rectifier (SCR), the heating element's output power is adjusted to maintain the same level under different national voltages, thus guaranteeing the steam iron's usability while traveling in any country.

[0042] In one embodiment, such as Figure 2 As shown, a wire sheath 14 is provided on one side of the bottom of the housing 1, which can provide a certain degree of protection for the wires. The surfaces of the front cover 2 and the rear cover 3 are both provided with anti-slip textures, and the surface of the front cover 2 is provided with a switch button 15. The inner top sides of the housing 1 are provided with slide rails 16 that cooperate with the lifting handle 4, so as to facilitate the movement of the lifting handle 4. The top of the slide rails 16 is installed with heat sinks 5, which can effectively improve the heat dissipation of the PCB board.

[0043] In one embodiment, such as Figure 10 As shown, the voltage recognition and control circuit includes a fuse F1, resistors R0, R1, R2, R3, R4, R6, R13, a heating wire RL, a sampling resistor RS, diodes D1 and D4, a thyristor TR1, filter capacitors EC1 and EC2, capacitor C5, an inductor L1, an optocoupler PT1, a power supply chip U1, and a microcontroller U2. One end of fuse F1 is connected to the live wire L and one end of the heating wire RL. The other end of fuse F1 is connected to one end of resistor R0 and the anode of diode D1. The other end of resistor R0 is connected to the cathode of diode D4 and the ZERO pin of microcontroller U2. The anode of diode D4 is connected to the neutral wire N, one end of sampling resistor RS, one end of resistor R2, the cathode of filter capacitor EC1, the second pin of power supply chip U1, the cathode of filter capacitor EC2, one end of resistor R13, and one end of capacitor C5, and grounded. The cathode of diode D1 is connected to one end of resistor R1, the filter... The positive terminal of capacitor EC1 is connected to the fourth pin of power chip U1. The other end of resistor R1 is connected to the other end of resistor R2 and the V-TECT terminal of microcontroller U2. The first pin of power chip U1 is connected to one end of inductor L1, the positive terminal of filter capacitor EC2, the other end of resistor R13, the other end of capacitor C5, and the first pin of optocoupler PT1. The other end of inductor L1 is connected to the fifth and sixth pins of power chip U1. The second pin of optocoupler PT1 is connected to one end of resistor R3. The other end of resistor R3 is connected to the PW1 terminal of microcontroller U2. The fourth pin of optocoupler PT1 is connected to the gate of thyristor TR1. The anode of thyristor TR1 is connected to one end of resistor R6 and the other end of heating wire RL. The other end of resistor R6 is connected to the sixth pin of optocoupler PT1. The cathode of thyristor TR1 is connected to the other end of sampling resistor RS and one end of resistor R4. The other end of resistor R4 is connected to the current sampling terminal IS of microcontroller U2. By incorporating a voltage recognition and control circuit, consumers can use the steam iron directly in any country, region, and under any power grid voltage without additional operation or conversion, effectively avoiding dangerous situations. Currently, voltage-adjustable irons on the market can only roughly stabilize the power at a relatively reasonable value under different voltages, with significant differences in power values ​​across different voltages, failing to accurately specify the wattage. This results in inconsistent steam output from different steam irons under different voltages. However, this invention can stabilize the power of the steam iron within a rated value under any voltage, effectively solving the problem of inconsistent steam output from different steam irons under different voltages.

[0044] The principle of the voltage identification and regulation circuit is as follows: The AC live wire is connected to the circuit input L, and the neutral wire is connected to the input point N. After half-wave rectification by D1 and filtering by electrolytic capacitor EC1, a DC high voltage is generated to supply the BUCK power chip. The BUCK power circuit, composed of power chip U1, L1, EC2, R13, and C5, generates a regulated 5V DC power supply to supply the MCU U2 and optocoupler PT1.

[0045] R0 and D4 are connected in series. One end of R0 is connected to the live wire L, and the other end is connected to the negative terminal of D4. The positive terminal of D4 is connected to the neutral wire N. The connection point of R0 and D4 is connected to the ZERO terminal of the MCU, providing the MCU with a zero-crossing signal of AC current. One end of R1 is connected to the positive high-voltage terminal of the filter capacitor EC1, and the other end is connected to R2. The other end of R2 is connected to the neutral wire N. The voltage divider point V-TECT formed by the series circuit of R1 and R2 provides the voltage sampling signal to the MCU. R3 is the input current limiting resistor for the optocoupler. One end is connected to the negative input terminal of the optocoupler PT1, and the other end is connected to the PW1 pin of the MCU. The MCU output signal controls the conduction and shutdown of the optocoupler. The positive input pin 1 of the optocoupler is connected to VCC 5V. The output pin 6 of the optocoupler is connected to R6. The other end of R6 is connected to one low-voltage end of the load heating wire RL. The other high-voltage end of the load heating wire is connected to the live wire L. The output pin 4 of the optocoupler is connected to the gate of the bidirectional thyristor TR1. The anode of the thyristor is connected to the low-voltage end of the heating wire RL together with one end of R6. The cathode of the thyristor is connected to the current sampling resistor RS. The other end of the sampling resistor RS is connected to the neutral wire N. At the same time, one end of the current limiting resistor R4 is connected to the RS end connected to the cathode of the thyristor. The other end of R4 is connected to the current sampling terminal IS of the MCU. When the load current is turned on, a voltage sampling signal is generated on the sampling resistor RS and provided to the MCU for current value analysis and calculation.

[0046] The above circuit can be adapted to various international AC voltages and frequencies, enabling the load heating wire to obtain a constant power. The working principle of the circuit will be explained in detail below.

[0047] The MCU performs frequency analysis by sampling voltage and zero-crossing signals to calculate the current mains input voltage and frequency. Through a pre-set program, it outputs a signal that lags behind the zero-crossing point by a certain time to the optocoupler, causing the optocoupler to turn on and control the conduction (time) of the thyristor. At this time, when the load current passes through the current sampling resistor RS, a voltage signal is generated. This sampled signal is processed by the MCU to obtain a peak current signal, which can then be used to calculate the load resistance value and record it in the MCU's internal memory. Knowing the load impedance, the conduction time of the thyristor after the zero-crossing point can be calculated from the input voltage, so that the load obtains a controllable fixed power.

[0048] Specific examples are as follows:

[0049] Assuming the output AC voltage is 100V, 60Hz, and the load heating wire impedance is 10 ohms, the current can be calculated as 10A and the full power as 1000W. When the design power requirement is 500W, given that the 60Hz period is 16 milliseconds, the MCU output to the optocoupler provides a positive half-wave trigger signal 4 milliseconds after the two zero-crossing points of the same period. This causes the thyristor to turn on for half the time in both the positive and negative half-waves. Therefore, the power obtained by the load heating wire is half the current of the entire cycle, which is 500W.

[0050] The same principle applies to other input voltage systems. As long as the input voltage, frequency, load impedance, and other parameters are obtained, the above circuit can be calculated by the MCU program and output a trigger signal at the appropriate time to control the thyristor to conduct, thereby obtaining the required output power.

[0051] In one embodiment, such as Figures 2-4 As shown, a single electric heating tube heater 17 is installed inside the heating steam chamber 10. A temperature fuse 18 is installed on one side of the top of the heating steam chamber 10, and a water inlet connector 19 is installed on one side of the temperature fuse 18. A temperature sensor 20 is installed on the side of the water inlet connector 19 away from the temperature fuse 18. In specific applications, an NTC temperature sensor is used. The PCB board 8 is electrically connected to the DC water pump 7, the single electric heating tube heater 17, the temperature fuse 18, and the NTC temperature sensor 20 via wires. By installing a single electric heating tube heater 17, the output power can be adjusted under the action of a single heating element in conjunction with the voltage recognition and control circuit. This allows the power of the steam iron to be stabilized within a rated value under any voltage. Compared with traditional multi-heating elements, this invention has the characteristics of low cost, easy assembly, and stable performance. A positioning groove 21 that mates with the heating steam chamber 10 is vertically installed on the top of the iron soleplate 11. Several connecting posts 22 are provided on the outer layer of the positioning groove 21 to facilitate a sealed connection between the heating steam chamber 10 and the iron soleplate 11.

[0052] like Figures 11-12 As shown, when the steam iron is working, AC power is connected to the PCB board 8 of the iron. The PCB board 8 controls the single electric heating tube heater 17 to start working. When the NTC temperature sensor 20 detects that the temperature reaches 120°C, the PCB board 8 notifies the DC water pump 7 to start supplying water. The cold water is converted into the required steam by the single electric heating tube heater 17 in the heating steam chamber 10 and sprayed out from the annular steam nozzle assembly 12 for ironing clothes.

[0053] In one embodiment, such as Figures 5-9As shown, the annular steam nozzle assembly 12 includes a plurality of annular steam nozzles 1201 formed on the iron soleplate 11, and the inner diameter of the plurality of annular steam nozzles 1201 gradually decreases from the outside to the inside; a steam cavity 1202 is formed inside the annular steam nozzle 1201, and a steam inlet 1203 that cooperates with the steam cavity 1202 is formed on one side of the middle of the annular steam nozzle 1201; an annular baffle 1204 is inclinedly arranged inside the steam cavity 1202. The top of the steam injection port 1202 is provided with an arc-shaped portion 1205; an annular baffle 1204 divides the steam chamber 1202 into an inlet chamber 1206 and an outlet chamber 1207 located inside the inlet chamber 1206, and the inlet chamber 1206 is connected to the inlet port 1203. A concentrator 1208 is formed between the top of the outlet chamber 1207 and the annular baffle 1204; wherein, the annular baffle 1204 is inclined from bottom to top from the inlet chamber 1206 toward the outlet chamber 1207. A plurality of through holes 1209 are annularly opened in the middle of the inner wall of the annular steam injection port 1201, and the through holes 1209 are located below the concentrator 1208, and the diameter of the through holes 1209 is smaller than the diameter of the inlet port 1203.

[0054] By using the annular steam nozzle assembly 12, the steam in the heating steam chamber 10 enters several annular steam nozzles 1201 under mutual compression. The steam released is accelerated by the steam inlet chamber 1206 and the concentrator nozzle 1208. The rapidly flowing steam from the concentrator nozzle 1208 is released along the inner wall of the funnel-shaped steam outlet chamber 1207 under the Coanda effect, forming several sets of rapidly flowing annular steam streams with gradually decreasing inner diameters. Compared to traditional steam nozzle release methods, this invention accelerates the steam release, effectively improving the release speed and uniformity. This not only effectively avoids the phenomenon of steam remaining on clothing for too long due to slow release speed, making it easier to fully wet and iron the clothing, thus improving ironing efficiency, but also effectively prevents steam from accumulating in a certain area during ironing due to slow release speed, thereby effectively avoiding excessive water stains and ensuring a certain level of ironing effect.

[0055] Furthermore, by incorporating several annular steam nozzles 1201 with gradually decreasing sizes, the present invention enables the through holes 1209 on the inner wall of the outer annular steam nozzles 1201 to provide traction for the steam to enter the inner annular steam nozzles 1201, thereby effectively increasing the speed at which steam enters the inner steam chamber 1202, thus effectively reducing ironing time and improving the ironing efficiency of the steam iron, which can better meet the needs of users.

[0056] The working principle of the annular steam nozzle assembly is as follows: Steam in the heating steam chamber 10, under mutual compression, enters several steam chambers 1202 from the steam inlet 1203. Because the steam inside the steam inlet chamber 1206 is continuously compressed by the subsequently entering steam, the steam inside the steam inlet chamber 1206 flows out at high speed from the concentrator 1208. The high-speed steam flowing out from the concentrator 1208, under the Coanda effect, flows along the inner wall of the funnel-shaped steam outlet chamber 1207 and is released from the bottom of the steam outlet chamber 1207, forming several sets of annular steam flows with gradually decreasing inner diameter, thus achieving an ironing effect. Compared to traditional steam nozzle release methods, this invention can accelerate the steam, thereby effectively improving the steam release speed and uniformity. Furthermore, according to Bernoulli's principle, the airflow flowing out from the slits has a high speed and low pressure, creating a pressure difference with the surrounding air. This allows the outer annular steam nozzle 1201 to draw steam from the annular cavity formed by the inner annular steam nozzle 1201 into the outer steam outlet cavity 1207 under the action of the through hole 1209. This provides a traction force for the steam to enter the annular cavity. Since the size of the through hole 1209 is much smaller than the size of the steam inlet 1203, the steam entering the annular cavity will enter the steam inlet cavity 1206 of the inner annular steam nozzle 1201 and be released from the bottom end of the steam outlet cavity 1207 in the inner annular steam nozzle 1201. Compared with the traditional steam release method, this invention can not only use several annular steam nozzles 1201 to accelerate the steam, but also use the through hole 1209 opened on the inner wall of the outer annular steam nozzle 1201 to provide a traction force for the steam to enter the inner annular steam nozzle 1201, thereby effectively increasing the speed at which the steam enters the inner steam cavity 1202.

[0057] In one embodiment, such as Figure 3 , Figure 5 and Figure 6 As shown, the adsorption component 13 includes an adsorption cavity 1301 inside the iron soleplate 11, and a negative pressure port 1302 connected to the adsorption cavity 1301 is provided on the outer bottom of the iron soleplate 11. In specific applications, to avoid the negative pressure port 1302 absorbing the steam released by the annular steam nozzle component 12, the diameter of the negative pressure port 1302 is set to be small in this embodiment, and it is kept at a certain distance from the annular steam nozzle component 12. At the same time, the suction force of the air pump 1303 is small during operation and will not have the effect of absorbing steam. An air pump 1303 that cooperates with the adsorption cavity 1301 is provided on one side of the top of the iron soleplate 11. By providing the adsorption component 13, the air pump 1303 can extract the air in the adsorption cavity 1301 and form a negative pressure, so that the negative pressure port 1302 can adsorb the clothes under the action of negative pressure, thereby facilitating the ironing of the clothes.

[0058] In summary, by utilizing the above-mentioned technical solution of the present invention, and by providing an annular steam nozzle assembly 12, the steam in the heating steam chamber 10 enters several annular steam nozzles 1201 under mutual compression. The steam released is accelerated by the steam inlet chamber 1206 and the concentrator nozzle 1208. This causes the rapidly flowing steam from the concentrator nozzle 1208 to be released along the inner wall of the funnel-shaped steam outlet chamber 1207 under the Coanda effect, forming several sets of rapidly flowing annular steam streams with gradually decreasing inner diameters. Compared to traditional steam nozzle release methods, the present invention can accelerate the steam release, effectively improving the steam release speed and uniformity. This not only effectively avoids the phenomenon of steam remaining on clothing for too long due to slow steam release, making it easier to fully wet and iron the clothing, effectively improving ironing efficiency, but also effectively avoids the phenomenon of steam accumulating in a certain area during ironing due to slow steam release, thus effectively preventing excessive water stains and providing a certain guarantee for the ironing effect.

[0059] Furthermore, by incorporating several annular steam nozzles 1201 with gradually decreasing sizes, the present invention enables the through holes 1209 on the inner wall of the outer annular steam nozzles 1201 to provide traction for the steam to enter the inner annular steam nozzles 1201, thereby effectively increasing the speed at which steam enters the inner steam chamber 1202, thus effectively reducing ironing time and improving the ironing efficiency of the steam iron, which can better meet the needs of users.

[0060] In addition, by providing the adsorption component 13, the air pump 1303 can extract the air in the adsorption chamber 1301 and form a negative pressure, so that the negative pressure port 1302 can adsorb the clothes under the action of negative pressure, thereby facilitating the ironing of the clothes.

[0061] Furthermore, by incorporating a voltage recognition and control circuit, consumers can use the steam iron without additional operation or conversion. It can be plugged in and used directly under any power grid voltage in any country or region, effectively preventing dangerous situations. Currently, voltage-adjustable irons on the market can only roughly stabilize the power at a relatively reasonable value under different voltages, with significant differences in power values ​​across different voltages, failing to accurately specify the wattage. This results in inconsistent steam output from different steam irons under different voltages. However, this invention can stabilize the power of the steam iron within a rated value under any voltage, effectively solving the problem of inconsistent steam output from different steam irons under different voltages.

[0062] Furthermore, by providing a single electric heating element heater 17, the output power can be adjusted in conjunction with the voltage recognition and control circuit under the action of a single heating element. This allows the power of the steam iron to be stabilized within a rated value under any voltage. Compared with traditional multi-heating elements, this invention has the characteristics of low cost, easy assembly, and stable performance.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A travel steam iron suitable for different voltages in different countries, comprising a housing (1), a front cover (2) fitted to the surface of the housing (1), and a rear cover (3) fitted to the rear of the housing (1), characterized in that, The top of the housing (1) is provided with a lifting handle (4) that works in conjunction with it. The inner top of the housing (1) is provided with a heat sink (5), the bottom of the heat sink (5) is provided with a water tank (6), a DC water pump (7) is provided on one side of the water tank (6), a PCB board (8) is provided on the top of the DC water pump (7), and a voltage identification and control circuit is provided on the PCB board (8). The bottom of the water tank (6) is provided with a heat insulation cover (9), and the top of the heat insulation cover (9) is provided with a heating steam chamber (10) that cooperates with it. The bottom of the heating steam chamber (10) is provided with an iron sole plate (11) that cooperates with it. The iron soleplate (11) has several annular steam nozzle assemblies (12) that cooperate with the heating steam chamber (10) through the middle. An adsorption assembly (13) is provided at the bottom of the iron soleplate (11) and outside the annular steam nozzle assembly (12). The annular steam nozzle assembly (12) includes a plurality of annular steam nozzles (1201) opened on the iron sole plate (11), and the inner diameter of the plurality of annular steam nozzles (1201) gradually decreases from the outside to the inside. The annular steam nozzle (1201) has a steam chamber (1202) inside, and a steam inlet (1203) that cooperates with the steam chamber (1202) is provided on one side of the middle part of the annular steam nozzle (1201). An annular baffle (1204) is inclinedly arranged inside the steam chamber (1202), and an arc-shaped part (1205) is provided on the top of the annular baffle (1204). The annular partition (1204) divides the steam chamber (1202) into a steam inlet chamber (1206) and a steam outlet chamber (1207) located inside the steam inlet chamber (1206). The steam inlet chamber (1206) is connected to the steam inlet (1203). A concentrator (1208) is formed between the top of the steam outlet chamber (1207) and the annular partition (1204). The annular baffle (1204) is inclined from bottom to top in the direction from the steam inlet chamber (1206) toward the steam outlet chamber (1207).

2. The travel-sized steam iron for quick ironing, suitable for different voltages in different countries, as described in claim 1, is characterized in that... The bottom side of the housing (1) is provided with a wire sheath (14), the surfaces of the front cover (2) and the rear cover (3) are provided with anti-slip texture, and the surface of the front cover (2) is provided with a switch button (15).

3. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 1, is characterized in that... The inner top of the housing (1) is provided with slide rails (16) that cooperate with the lifting handle (4), and the top of the slide rails (16) is installed on the heat sink (5).

4. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 1, is characterized in that... The voltage identification and control circuit includes a fuse F1, resistors R0, R1, R2, R3, R4, R6, and R13, a heating wire RL, a sampling resistor RS, diodes D1 and D4, a silicon controlled rectifier TR1, filter capacitors EC1 and EC2, a capacitor C5, an inductor L1, an optocoupler PT1, a power chip U1, and a microcontroller U2. One end of the fuse F1 is connected to one end of the live wire L and one end of the heating wire RL, respectively. The other end of the fuse F1 is connected to one end of the resistor R0 and the positive terminal of the diode D1, respectively. The other end of the resistor R0 is connected to the negative terminal of the diode D4 and the ZERO terminal of the microcontroller U2, respectively. The positive terminal of the diode D4 is connected to the neutral line N, one end of the sampling resistor RS, one end of the resistor R2, the negative terminal of the filter capacitor EC1, the second pin of the power chip U1, the negative terminal of the filter capacitor EC2, one end of the resistor R13, and one end of the capacitor C5, and grounded. The negative terminal of the diode D1 is connected to one end of the resistor R1, the positive terminal of the filter capacitor EC1, and the fourth pin of the power chip U1, respectively. The other end of the resistor R1 is connected to the other end of the resistor R2 and the V-TECT terminal of the microcontroller U2, respectively. The first pin of the power chip U1 is connected to one end of the inductor L1, the positive terminal of the filter capacitor EC2, the other end of the resistor R13, the other end of the capacitor C5, and the first pin of the optocoupler PT1. The other end of the inductor L1 is connected to the fifth and sixth pins of the power chip U1. The second pin of the optocoupler PT1 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the PW1 terminal of the microcontroller U2. The fourth pin of the optocoupler PT1 is connected to the gate of the silicon controlled rectifier TR1. The anode of the silicon controlled rectifier TR1 is connected to one end of the resistor R6 and the other end of the heating wire RL. The other end of the resistor R6 is connected to the sixth pin of the optocoupler PT1. The cathode of the silicon controlled rectifier TR1 is connected to the other end of the sampling resistor RS and one end of the resistor R4. The other end of the resistor R4 is connected to the current sampling terminal IS of the microcontroller U2.

5. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 1, is characterized in that... The heating steam chamber (10) is equipped with a single electric heating tube heater (17). A temperature fuse (18) is provided on one side of the top of the heating steam chamber (10). A water inlet connector (19) is provided on one side of the temperature fuse (18). A temperature sensor (20) is provided on the side of the water inlet connector (19) away from the temperature fuse (18).

6. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 5, is characterized in that... The PCB board (8) is electrically connected to the DC water pump (7), the single electric heating tube heater (17), the temperature fuse (18), and the temperature sensor (20) via wires.

7. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 1, is characterized in that... The top of the iron soleplate (11) is vertically upwardly provided with a positioning groove (21) that cooperates with the heating steam chamber (10), and the outer layer of the positioning groove (21) is provided with several connecting columns (22).

8. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 1, is characterized in that... The annular steam nozzle (1201) has several through holes (1209) in the middle of its inner wall, and the through holes (1209) are located below the air concentrator (1208). The diameter of the through holes (1209) is smaller than the diameter of the steam inlet (1203).

9. The travel-sized steam iron for quick ironing with different voltages in different countries, as described in claim 1, is characterized in that... The adsorption assembly (13) includes an adsorption chamber (1301) opened inside the iron sole plate (11), and a negative pressure port (1302) connected to the adsorption chamber (1301) is opened on the bottom outer side of the iron sole plate (11), and an air pump (1303) that cooperates with the adsorption chamber (1301) is provided on the top side of the iron sole plate (11).

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