Ironing apparatus and steam intelligent recycling system thereof

Abstract

The application discloses an ironing equipment and a steam intelligent recycling system thereof. The steam intelligent recycling system is connected with a steam exhaust port of an ironing pot of the ironing equipment, an external water storage tank and a water pump. The steam exhaust port of the ironing pot is connected with a steam inlet interface of an energy-saving preheating furnace through a first one-way valve. A steam outlet interface of the energy-saving preheating furnace is connected with a water inlet interface of the energy-saving preheating furnace in sequence through a first electromagnetic valve, the water storage tank, the water pump and a second electromagnetic valve. A water outlet interface of the energy-saving preheating furnace is connected with a water inlet interface of a steam generator of the ironing equipment through a second one-way valve. When the ironing pot exhausts steam, tail steam of the ironing pot enters the energy-saving preheating furnace and the water storage tank in sequence, and the tail steam directly exchanges heat with water through the energy-saving preheating furnace, so that the heat of the tail steam is maximally utilized to preheat water in the energy-saving preheating furnace and the water storage tank. When water is replenished, the water is sequentially subjected to heat exchange, so that the temperature of the water gradually increases, and hot water is replenished into the furnace body, thereby reducing the pressure drop of the steam generator due to the replenishment of cold water, and achieving the purpose of energy saving.

Description

Technical Field

[0001] This invention relates to the field of steam generator ironing technology, and in particular to an ironing device and its intelligent steam recovery system. Background Technology

[0002] In the garment industry, ironing is a necessary operation. Most ironing methods involve connecting an iron to a steam generator. Steam generated by the generator enters the iron, which then irons the garment. Traditional ironing equipment typically uses a preheating furnace to quickly generate steam. This furnace has heating elements that heat water before it is supplied to the steam generator.

[0003] However, ironing generates waste steam, which typically exceeds 100°C. Directly releasing this steam can easily burn workers and damage pipes and valves. Recycling this steam could save energy. However, current technologies mostly recover this steam by returning it directly to the water source or by welding a U-shaped pipe to a water tank, using heat exchange or conduction between the steam and water to preheat the water. While this method utilizes the heat from the steam to some extent, it suffers from significant heat loss during the exchange process. Maintaining the water tank or source is extremely difficult, and the steam cools down statically. Furthermore, the cooled steam is ultimately released directly, failing to achieve the desired energy-saving effect.

[0004] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide an ironing device and its intelligent steam recovery system, which allows the steam from the iron to directly exchange heat with the water that needs to be added to the steam generator, thereby minimizing the heat loss of the steam from the iron and achieving the effects of energy saving and improving ironing quality.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] This invention provides a steam intelligent recovery system for an ironing device, which connects the steam vent of the iron, an external water tank, and a water pump. The system includes a first one-way valve, a second one-way valve, a first solenoid valve, a second solenoid valve, and at least one energy-saving preheating furnace. The energy-saving preheating furnace has a steam inlet, a steam outlet, a water inlet, and a water outlet. The steam vent of the iron is connected to the steam inlet of the energy-saving preheating furnace via the first one-way valve. The steam outlet of the energy-saving preheating furnace is connected to the water inlet of the energy-saving preheating furnace sequentially via the first solenoid valve, the water tank, the water pump, and the second solenoid valve. The water outlet of the energy-saving preheating furnace is connected to the water inlet of the steam generator of the ironing device via the second one-way valve.

[0008] This invention provides another intelligent steam recovery system for ironing equipment, which connects the steam vent of the iron, an external water tank, and a water pump of the ironing equipment. It includes a first one-way valve, a second one-way valve, a first solenoid valve, a second solenoid valve, a first energy-saving preheating furnace, and a second energy-saving preheating furnace. The first energy-saving preheating furnace is equipped with a steam inlet, a steam and water outlet, and a water outlet. The second energy-saving preheating furnace is equipped with a steam and water outlet, a steam outlet, and a water inlet. The steam vent of the iron is connected to the steam inlet of the first energy-saving preheating furnace via the first one-way valve. The steam and water outlet of the first energy-saving preheating furnace is connected to the steam and water outlet of the second energy-saving preheating furnace. The water outlet of the first energy-saving preheating furnace is connected to the water inlet of the steam generator of the ironing equipment via the second one-way valve. The steam outlet of the second energy-saving preheating furnace is connected to the water inlet of the second energy-saving preheating furnace sequentially via the first solenoid valve, the water tank, the water pump, and the second solenoid valve.

[0009] The present invention also provides an ironing device. An ironing device includes a steam generator, an iron, a water tank, and a water pump. The steam generator is connected to the iron. The ironing device also includes the intelligent steam recovery system described above. The steam outlet of the iron is connected to the steam inlet of the intelligent steam recovery system through a steam return pipe. The steam outlet of the intelligent steam recovery system is connected to the water inlet of the intelligent steam recovery system in sequence through a first solenoid valve, a water tank, a water pump, and a second solenoid valve. The water outlet of the intelligent steam recovery system is connected to the water inlet of the steam generator.

[0010] Compared to existing technologies, the ironing equipment and its intelligent steam recovery system provided by this invention, wherein the intelligent steam recovery system connects the steam outlet of the iron, an external water tank, and a water pump of the ironing equipment. This allows the steam discharged from the iron to enter the energy-saving preheating furnace via a first one-way valve, preventing the steam from flowing back into the iron and ensuring the heat of the steam in the iron. Once the steam enters the preheating furnace, it comes into full contact with the water, achieving heat exchange. Furthermore, when the steam discharged from the iron directly exchanges heat with the water in the preheating furnace, the steam is discharged through the steam outlet via the first solenoid valve and transported to the water tank. This process not only maintains the steam pressure balance in the preheating furnace but also pre-sets the water level in the storage tank. When water needs to be added to the steam generator, the preheated water in the water tank enters the energy-saving preheating furnace for heat exchange and then enters the steam generator through the water outlet and the second one-way valve. This avoids the steam generator consuming steam and needing to be replenished, as adding cold water would cause a large drop in steam pressure, which would affect the ironing effect.

[0011] The second one-way valve prevents steam from flowing back into the preheating furnace due to steam pressure when the preheating furnace replenishes water to the steam generator, thus avoiding steam loss in the steam generator. This further ensures the stability of the steam pressure in the steam generator. At the same time, the second solenoid valve and water pump can automatically replenish the water in the storage tank into the preheating furnace, thereby ensuring the water volume in the preheating furnace. Moreover, during use, the water temperature in each furnace remains within a constant range.

[0012] This invention allows the steam from the ironing iron to directly exchange heat with the water in the energy-saving preheating furnace, maximizing the utilization of the steam's heat. Compared to existing methods that involve directly returning the steam to the water source or welding a U-shaped pipe to the water tank for heat exchange or conduction between steam and water, this invention has a higher heat utilization rate and is more energy-efficient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the first preferred embodiment of the intelligent steam recovery system for the ironing equipment provided by the present invention.

[0014] Figure 2 This is a schematic diagram of the second preferred embodiment of the intelligent steam recovery system for the ironing equipment provided by the present invention.

[0015] Figure 3 A schematic diagram of the structure of the intelligent steam recovery system for the ironing equipment provided by the present invention, with the addition of a third energy-saving preheating furnace.

[0016] Figure 4 This is a schematic diagram of the third preferred embodiment of the intelligent steam recovery system for the ironing equipment provided by the present invention.

[0017] Figure 5 This is a schematic diagram of the fourth preferred embodiment of the intelligent steam recovery system for the ironing equipment provided by the present invention.

[0018] Figure 6 A schematic diagram of the liquid level control device in the steam generator of the ironing equipment provided by the present invention.

[0019] Figure 7 An exploded view of the liquid level control device in the steam generator of the ironing equipment provided by the present invention.

[0020] Figure 8 This is an exploded view of an integrated solenoid valve used in the ironing equipment provided by the present invention.

[0021] Figure 9 This is a first-view structural schematic diagram of an integrated solenoid valve used in the ironing equipment provided by the present invention.

[0022] Figure 10 This is a second-view structural schematic diagram of an integrated solenoid valve used in the ironing equipment provided by the present invention.

[0023] Figure 11 This is a third-view structural schematic diagram of an integrated solenoid valve used in an ironing device provided by the present invention.

[0024] Figure 12 Provided by the present invention Figure 11 A schematic diagram of the cross-sectional structure at point AA.

[0025] Figure 13 Provided by the present invention Figure 11 A schematic diagram of the cross-sectional structure at point BB.

[0026] Figure 14 This is a first-view structural schematic diagram of another integrated solenoid valve used in the ironing equipment provided by the present invention.

[0027] Figure 15 This is a second-view structural schematic diagram of another integrated solenoid valve used in the ironing equipment provided by the present invention.

[0028] Figure 16 Provided by the present invention Figure 15 A schematic diagram of the cross-sectional structure at point AA.

[0029] Figure 17 Provided by the present invention Figure 15 A schematic diagram of the cross-sectional structure at point BB.

[0030] Attached image annotations:

[0031] 100. Intelligent Steam Recovery System 1. First Check Valve 2. Second Check Valve 3. First Solenoid Valve 4. Second Solenoid Valve 5. Energy-Saving Preheater 51. Steam Inlet 52. Steam Outlet 53. Water Inlet 54. Water Outlet 6. Insulation Pipe 7. Insulation Layer 8. Liquid Level Control Device 81. Detection and Isolation Protection Pipe 82. Float 821. Upper Shell 822. Lower Shell 8221. Connection Hole 823. Retaining Ring 824. Stainless Steel Sleeve 83. First Retaining Ring 84. Second Retaining Ring 85. Hall Effect Sensor 01. First Energy-Saving Preheater 011. Steam Outlet and Water Inlet 02. Second Energy-Saving Preheater 021. Steam Inlet and Water Outlet 3. Third energy-saving preheating furnace 200. Ironing equipment 201. Water storage tank 202. Water pump 203. Steam generator 204. Iron 41. Third solenoid valve 9. Integrated solenoid valve 91. Valve seat 911. Machining process hole 912. Plug 92. First pipe port 921. First main hole 922. First side hole 93. Second pipe port 931. Second main hole 932. Second side hole 94. Third pipe port 95. Bottom through hole 96. First valve body 961. Upper end cap 962. Coil 963. Valve sleeve 964. Valve core 965. Valve core spring 966. Valve seal 967. Sealing ring 97. Second valve body 98. Connector Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] It should be noted that when a component is referred to as being "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0034] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of the present invention are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0035] Please see Figure 1The steam intelligent recovery system 100 of the ironing equipment provided in the first preferred embodiment of the present invention is connected to the steam vent (not labeled in the figure) of the iron 204 of the ironing equipment 200, the external water tank 201 and the water pump 202. It includes a first one-way valve 1, a second one-way valve 2, a first solenoid valve 3, a second solenoid valve 4, and at least one energy-saving preheating furnace 5. The energy-saving preheating furnace 5 has a steam inlet 51, a steam outlet 52, a water inlet 53 and a water outlet 54.

[0036] During connection, the exhaust port of the iron 204 is connected to the steam inlet 51 of the energy-saving preheating furnace 5 through the first one-way valve 1, so that the exhaust steam from the iron 204 enters the energy-saving preheating furnace 5 through the first one-way valve 1. The first one-way valve 1 prevents the exhaust steam from the iron in the energy-saving preheating furnace 5 from flowing back into the iron 204, thus ensuring the heat of the steam in the iron 204. When the exhaust steam enters the energy-saving preheating furnace 5, it directly and fully contacts the water in the furnace to achieve the purpose of heat exchange.

[0037] Furthermore, the steam outlet 52 of the energy-saving preheating furnace 5 is connected to the water inlet 53 of the energy-saving preheating furnace 5 in sequence through the first solenoid valve 3, the water storage tank 201, the water pump 202, and the second solenoid valve 4. The water outlet 54 of the energy-saving preheating furnace 5 is connected to the water inlet (not labeled in the figure) of the steam generator 203 of the ironing equipment 200 through the second one-way valve 2.

[0038] When the steam from the iron 204 is heated by the energy-saving preheating furnace 5, it is discharged through the steam outlet 52 via the first solenoid valve 3 and transported to the water storage tank 201. After the heat is neutralized in the energy-saving preheating furnace 5, the hot steam is converted into water, and a small amount of warm water flows into the water storage tank 201, which also serves to pre-fill the water in the water storage tank 201. When water needs to be added to the steam generator 203, the preheated water in the water storage tank 201 enters the energy-saving preheating furnace 5 for heat exchange, and then enters the steam generator 203 through the water outlet 54 and the second one-way valve 2. This avoids a large drop in steam pressure in the steam generator 203, which would affect the ironing effect. The second one-way valve 2 prevents steam from flowing back into the energy-saving preheating furnace 5 due to steam pressure when water is added to the steam generator 203, thus avoiding steam loss in the steam generator 203 and further ensuring the stability of the steam pressure in the steam generator 203. Furthermore, the second solenoid valve 4 and the water pump 202 can automatically replenish the water in the water storage tank 201 into the energy-saving preheating furnace 5, thereby ensuring the water volume in the energy-saving preheating furnace 5 and thus ensuring the water capacity in the steam generator 203.

[0039] This invention allows the steam from the ironing iron to directly exchange heat with the water in the energy-saving preheating furnace 5, maximizing the use of the steam's heat to preheat the energy-saving preheating furnace 5 and the water in the water storage tank 201. Compared to existing methods that involve directly returning the steam to the water source or welding a U-shaped pipe to the water tank for heat exchange or conduction between steam and water, this invention features low heat loss, high heat utilization, and simple structure, and is also more energy-efficient.

[0040] The first solenoid valve 3 is a normally open solenoid valve, which allows the energy-saving preheating furnace 5 to discharge the steam from the hot iron at any time to ensure the steam pressure balance in the energy-saving preheating furnace 5. When the water storage tank 201 needs to replenish water to the energy-saving preheating furnace 5, the first solenoid valve 3 closes for a predetermined time (e.g., 10 seconds), and the water pump 202 is started to replenish water to the energy-saving preheating furnace 5.

[0041] In an optional embodiment, the steam inlet 51 and the water outlet 54 are located at the lower part of the energy-saving preheating furnace 5, so that the steam from the ironing iron rises from the lower part of the energy-saving preheating furnace 5 to fully heat the water in the energy-saving preheating furnace 5, and the water temperature at the lower part of the energy-saving preheating furnace 5 is also higher than that at the upper part, so that the hot water at the lower part can be directly replenished into the steam generator 203, which can minimize the pressure difference in the steam generator 203. The steam outlet 52 is located at the top of the energy-saving preheating furnace 5 so that the cooled steam from the ironing iron is transported to the water storage tank to preheat the water in the water storage tank, while the water inlet 53 is located at the upper part of the energy-saving preheating furnace 5, so that the water at a lower temperature is input from the upper part of the energy-saving preheating furnace 5, ensuring that the water temperature at the lower part of the energy-saving preheating furnace 5 is higher for replenishing water.

[0042] The aforementioned intelligent steam recovery system 100 uses only one energy-saving preheating furnace 5 to recover steam from the iron. A second preferred embodiment of the present invention also provides another intelligent steam recovery system 100 for ironing equipment (see [link]). Figure 2 The iron 204 of the ironing equipment 200 is connected to the steam vent (not labeled in the figure), the external water tank 201 and the water pump 202. It includes a first one-way valve 1, a second one-way valve 2, a first solenoid valve 3, a second solenoid valve 4, a first energy-saving preheating furnace 01 and a second energy-saving preheating furnace 02. The first energy-saving preheating furnace 01 is provided with a steam inlet 51, a steam and water inlet 011 and a water outlet 54.

[0043] During connection, the second energy-saving preheating furnace 02 is equipped with a steam inlet and water outlet interface 021, a steam outlet interface 52, and a water inlet interface 53. The steam outlet of the iron 204 is connected to the steam inlet interface 51 of the first energy-saving preheating furnace 01 through a first one-way valve 1. The steam outlet and water inlet interface 011 of the first energy-saving preheating furnace 01 are connected to the steam inlet and water outlet interface 021 of the second energy-saving preheating furnace 02. The water outlet interface 54 of the first energy-saving preheating furnace 1 is connected to the water inlet interface (not labeled in the figure) of the steam generator 203 of the ironing equipment 200 through a second one-way valve 2. The steam outlet interface 52 of the second energy-saving preheating furnace 021 is connected to the water inlet interface 53 of the second energy-saving preheating furnace 021 in sequence through a first solenoid valve 3, a water storage tank 201, a water pump 202, and a second solenoid valve 4.

[0044] In use, the steam from the iron 204 is introduced into the first energy-saving preheating furnace 01 through the first one-way valve 1, allowing the steam to directly contact and exchange heat with the water in the first energy-saving preheating furnace 01. Then, it is transported to the second energy-saving preheating furnace 02 through the steam outlet and water inlet interface 011, where it exchanges heat with the water. While ensuring the steam pressure balance in the first energy-saving preheating furnace 01, the steam preheats the water in the second energy-saving preheating furnace 02. Finally, the steam is transported to the water storage tank 201 through the steam outlet interface 52 on the second energy-saving preheating furnace 02 to preheat the water in the water storage tank 201. This process of multiple heat exchanges between the steam and water fully utilizes the heat of the steam, causing the heat of the steam to gradually decrease. When water needs to be added to the steam generator 203, the water pump 202 pumps the water from the water storage tank 201 into the second energy-saving preheating furnace 02, and then the water in the second energy-saving preheating furnace 02 enters the first energy-saving preheating furnace 01, and finally enters the steam generator 203. The water undergoes heat exchange between the second energy-saving preheating furnace 02 and the first energy-saving preheating furnace 01, so that the water reaches a higher temperature before entering the steam generator 203. This gradual increase in water temperature prevents the steam pressure in the steam generator 203 from dropping too much during the water addition process, which would affect the ironing effect.

[0045] Moreover, the first energy-saving preheating furnace 01 and the second energy-saving preheating furnace 02 are connected by only one pipe, which simplifies the structure of the first energy-saving preheating furnace 01 and the second energy-saving preheating furnace 2, and also simplifies their installation difficulty and reduces manual installation deviation.

[0046] Preferably, at least one third energy-saving preheating furnace 03 is connected in series between the first energy-saving preheating furnace 01 and the second energy-saving preheating furnace 02 (please refer to the previous section as well). Figure 3The third energy-saving preheating furnace 03 is provided with a steam inlet and a water outlet interface 021 and a steam outlet and a water inlet interface 011. The steam inlet and water outlet interface 021 of the third energy-saving preheating furnace 03 is connected to the steam outlet and water inlet interface 011 of the first energy-saving preheating furnace 01, and the steam outlet and water inlet interface 011 of the third energy-saving preheating furnace 03 is connected to the steam inlet and water outlet interface 021 of the second energy-saving preheating furnace 5.

[0047] The steam from the ironing iron is passed through the first energy-saving preheating furnace 01 for heat exchange, then directly into the third energy-saving preheating furnace 03 for further heat exchange, then into the second energy-saving preheating furnace 02, and finally into the water storage tank 201. This process of multiple direct heat exchange through water ensures full utilization of the steam's heat (the temperature of the steam gradually decreases during this process). Furthermore, when water is added to the steam generator 203, the water undergoes heat exchange through the water storage tank 201, the second energy-saving preheating furnace 02, the third energy-saving preheating furnace 03, and the first energy-saving preheating furnace 01, gradually increasing the water temperature as it moves from warm to hotter within the furnace body. This results in higher water temperatures entering the steam generator 203, reducing the pressure drop caused by adding cold water and achieving energy savings. The number of third energy-saving preheating furnaces 03 can be selected based on the steam volume and heat output to achieve optimal energy efficiency; no specific limit is imposed here.

[0048] This invention employs multiple energy-saving preheating furnaces, which can reduce the temperature difference between the furnaces and allow for smaller capacity preheating furnaces, faster water heating, and a higher temperature of water added to the steam generator 203 as the number of energy-saving preheating furnaces connected in series increases. The specific settings can be combined with equipment installation space, procurement costs, etc.

[0049] Please continue reading. Figure 2 and Figure 3 The steam outlet and water inlet 011 of the previous energy-saving preheating furnace and the steam inlet and water outlet 021 of the next energy-saving preheating furnace are connected by a heat-insulating pipe 6 to ensure that the heat of the steam from the ironing pan or the preheated water enters the next energy-saving preheating furnace or the previous energy-saving preheating furnace without loss, so as to achieve the ideal effect.

[0050] Furthermore, each energy-saving preheating furnace is provided with an insulation layer 7 on its outer side. Through the insulation layer 7, heat loss in each energy-saving preheating furnace can be avoided, so as to achieve a better preheating effect and further ensure the temperature of the water entering the steam generator 203.

[0051] Each energy-saving preheating furnace can be made of stainless steel, aluminum, or copper, as long as it does not rust during use. There are no restrictions on the material of the energy-saving preheating furnace; it can be selected according to needs.

[0052] Please see Figure 4In the steam intelligent recovery system of the ironing equipment provided in the third preferred embodiment of the present invention, the steam intelligent recovery system further includes a third solenoid valve 41, which is connected in series between the water pump 202 and the water storage tank 201. The third solenoid valve 41 is used to control the water pump 202 to drain water or exhaust steam to the water storage tank 201. During the intermittent period when water replenishment is not required or when water cannot be replenished at the normal speed due to the presence of gas in the water pump, the third solenoid valve 41 can be opened to allow the water pump 202 to drain water or exhaust steam (or gas) to the water storage tank 201. Since the water or steam discharged by the water pump 202 has temperature, the heat of the steam and water is fully recovered.

[0053] Because the third preferred embodiment adds a third solenoid valve 41 for drainage or steam exhaust, a corresponding tee or pipeline is needed for diversion. To simplify the structure and improve the reliability of the intelligent steam recovery system, the present invention also provides a fourth preferred embodiment, such as... Figure 5 As shown, the second solenoid valve 4 is replaced by an integrated solenoid valve 9. This integrated solenoid valve 9 is a two-position three-way solenoid valve. This integrated solenoid valve 9 has two independent valve cores, one inlet and two outlets, integrating the functions of two existing solenoid valves, one three-way valve and one pipeline. It can allow water and steam to enter from the integrated solenoid valve 9, and then be diverted from the integrated solenoid valve 9 to the steam generator or water tank. This saves the cost of at least one solenoid valve, one three-way valve and one pipeline, and avoids the instability of drainage and steam discharge caused by the deviation of personnel in the installation of these devices.

[0054] Based on the aforementioned intelligent steam recovery system 100 for ironing equipment, the present invention also provides an ironing device 200 (please continue reading). Figures 1 to 5 The system includes a steam generator 203, an iron 204, a water tank 201, a water pump 202, and a steam intelligent recovery system 100. The steam generator 203 is connected to the iron 204. The steam outlet of the iron 204 is connected to the steam inlet 51 of the steam intelligent recovery system 100 through a steam return pipe. The steam outlet 52 of the steam intelligent recovery system 100 is connected to the water inlet 53 of the steam intelligent recovery system 100 in sequence through a first solenoid valve 3, a water tank 201, a water pump 202, and a second solenoid valve 4 (or an integrated solenoid valve 9). The steam discharged from the steam intelligent recovery system 100 is recovered to preheat the water in the water tank 201. Then, the water in the water tank 201 enters the water in the steam intelligent recovery system 100 for heat exchange, so that the water undergoes medium-heat neutralization from low to high temperature, thereby gradually raising the water temperature.

[0055] Specifically, the water outlet 54 of the intelligent steam recovery system 100 is connected to the water inlet (not labeled in the figure) of the steam generator 203. This allows the steam generator 203 to replenish water by using water that has undergone heat exchange within the intelligent steam recovery system 100, thereby reducing pressure loss, improving steam stability, and enhancing ironing quality and efficiency. It is also energy-efficient and environmentally friendly, making it suitable for use in various garment factories. Furthermore, the water storage tank 201 is connected to an external water source (e.g., a faucet) to ensure sufficient water capacity for normal replenishment.

[0056] Since the functions and structure of the intelligent steam recovery system 100 have been described in detail above, they will not be repeated here.

[0057] Please refer to the following: Figure 6 and Figure 7 The steam generator 203 is equipped with a liquid level control device 8, which includes a detection isolation protection tube 81, a float 82, and a Hall circuit control board (not shown in the figure). The Hall circuit control board is disposed in the detection isolation protection tube 81, and the float 82 is slidably sleeved on the detection isolation protection tube 81. The detection isolation protection tube 81 is provided with a first baffle ring 83 to control the rising height of the float 82. The float 82 is located below the first baffle ring 83 to prevent the float 82 from leaving the detection range and causing misjudgment when the liquid in the equipment (such as the steam generator) boils.

[0058] The float 82 is equipped with a Hall sensor 85 adapted to the Hall element 4. The Hall element 4 can be a single unit and is electrically connected to the Hall circuit control board 3. The first retaining ring 83 is installed at the maximum height that the float 82 can rise to.

[0059] When the liquid level rises, the float 82 rises synchronously. When the float 82 reaches the Hall element 4, the Hall sensor 85 inside the float 82 senses the Hall element 4 in the detection isolation protection tube 81, causing the Hall circuit control board 3 to recognize the Hall electronic signal. This drives the optocoupler on the Hall circuit control board 3 to conduct, making the corresponding IO port of the main control chip on the Hall circuit control board 3 low (i.e., emitting a light signal - full water signal), causing the external water pump 202 to stop replenishing water. When the liquid level drops, the float 82 drops synchronously, descending a preset height (e.g., 10mm). When the Hall element 4 in the detection isolation protection tube 81 cannot sense the magnetic field signal of the Hall sensor 85 in the float 82, the optocoupler on the Hall circuit control board 3 is disconnected, making the corresponding IO port of the main control chip on the Hall circuit control board 3 high level. That is, the main control chip receives the water shortage signal and notifies the external control module (such as the PCL controller of the boiler), thereby controlling the water pump 202 to replenish water, so that the equipment will not dry-burn or overflow liquid. The present invention connects the Hall element 4 and the Hall sensor 85 so that they will not interfere with the working signal of the equipment, thus ensuring the normal operation of the equipment.

[0060] The Hall element 4 is installed at the same height as the first retaining ring 83. The first retaining ring 83 is used to control the height at which the float 82 floats when the liquid boils, so as to prevent the float 82 from leaving the sensing range and causing misjudgment.

[0061] In an optional embodiment, there may be multiple Hall elements 4, which are arranged in different positions. Therefore, multiple liquid level sensors can be set as needed, and the present invention does not impose any limitations.

[0062] Furthermore, the detection isolation and protection tube 81 is provided with a second baffle ring 84 for controlling the descent height of the float 82. The float 82 is located between the first baffle ring 83 and the second baffle ring 84. The second baffle ring 84 can be used to limit the descent height of the float 82 and prevent the float 82 from falling due to the wavy liquid surface generated when the liquid boils. The liquid level control device 8 can accurately detect the liquid level height so that the liquid level is always between the first baffle ring 83 and the second baffle ring 84.

[0063] The float 82 includes an upper shell 821, a lower shell 822, two retaining rings 823, and a stainless steel sleeve 824. Both the upper shell 821 and the lower shell 822 have connecting holes 8221. The upper shell 821 and the lower shell 822 are sealed together, and the connecting holes 8221 are connected by the stainless steel sleeve 824 to form a sphere with a through hole in the middle, so that the float 82 can float on the water surface. The stainless steel sleeve 824 also allows the float 82 to slide up and down along the detection isolation protection tube 81.

[0064] Specifically, the Hall sensor 85 and the retaining ring 823 are both sleeved on the stainless steel sleeve 824, and the retaining ring 823 is located at both ends of the Hall sensor 85. By setting the float 82 as a sealed hollow sphere, it can float on top, so that the Hall sensor 85 in the cavity can rise or fall synchronously. The retaining ring 823 plays the role of limiting the Hall sensor 85, so that the Hall sensor 85 will not slide on the stainless steel sleeve 824, thereby ensuring the accuracy of liquid level detection.

[0065] In this embodiment, both the upper shell 821 and the lower shell 822 are stainless steel shells, and the upper shell 821 and the lower shell 822 are welded together. The two ends of the stainless steel sleeve 824 are welded to the connecting holes 8221 of the upper shell 821 and the lower shell 822, respectively. The float 82 rises or falls due to its buoyancy. Since the float 82 has its own weight and foam does not have buoyancy, misjudgments caused by foam can be effectively avoided. Furthermore, the stainless steel shell and the float 82 with a through hole in the middle give the float 82 a certain weight. Because the float 82 has a through hole, its buoyancy is slightly reduced, preventing it from floating completely on the liquid surface like a plastic shell which is too light. It is less affected by water quality (such as the effect of foam) and also avoids the phenomenon of not being able to float.

[0066] When the stainless steel shell floats on the liquid surface, part of it is located below the liquid surface, so it will not be affected by water quality or foam on the liquid surface. This effectively avoids misjudgment caused by foam, making the liquid level control extremely accurate. Moreover, the stainless steel shell will not rust, which can extend the service life of the liquid level detection device.

[0067] The Hall element 4 is a high-temperature resistant Hall element, and the Hall sensor 85 has a high-temperature resistance of over 150℃, ensuring that the Hall sensor 85 is unaffected by the liquid temperature. This allows the liquid level control device 8 to be used in high-temperature equipment such as steam generators. The detection isolation and protection tube 81 is made of stainless steel, eliminating the magnetic field and preventing interference with the detection results of the Hall circuit control board. Specifically, the liquid level control device 8 is electrically connected to the water pump 202, allowing the water pump to control its on / off state based on the detection results from the liquid level control device 8. This enables the water pump 202 to automatically replenish water according to the water level in the steam generator 203, preventing the steam generator 203 from drying out or overflowing. This results in a high degree of automation for the ironing equipment 200, making it easier for operators to use. The connection and control method between the liquid level control device 8 and the water pump 203 are existing technologies and will not be described further here.

[0068] Please see Figures 8 to 12The integrated solenoid valve used in the intelligent steam recovery system of the ironing equipment provided by the present invention includes a valve seat 91. The valve seat 91 has a first port 92 for water discharge, a second port 93 for water and / or air discharge, and a third port 94 for water and / or air inlet into the valve seat 91. The first port 92 or the second port 93 is connected to the third port 94 through a bottom through hole 95. The valve seat 91 is also provided with a first valve body 96 and a second valve body 97. The first valve body 96 is used to control the on / off state of the first port 92 and the third port 94. That is, when the first valve body 96 is open, the water flowing in from the third port 94 can flow out from the first port 92. The second valve body 97 is used to control the on / off state of the second port 93 and the third port 94. That is, when the second valve body 97 is open, the water flowing in from the third port 94 and / or can flow out from the second port 93.

[0069] In this embodiment of the invention, when venting and / or draining is required, the second valve body 97 connects the second port 93 to the third port 94, allowing water and / or gas to enter the bottom through-hole 95 of the valve seat 91 through the third port 94 and then exit through the second port 93. When draining is required, the first valve body 96 connects the first port 92 to the third port 94, allowing water to enter the bottom through-hole 95 of the valve seat 91 through the third port 94 and then exit through the first port 92. This invention can simultaneously perform venting and draining operations. Compared with the existing method that requires adding a three-way valve and connecting two solenoid valves for diversion and then performing venting and draining separately, this invention has the advantages of simple structure, easy installation, reliable drainage and venting operation, and also saves equipment costs.

[0070] Please refer to the following: Figure 13 The valve seat 91 is provided with a first main hole 921 and a first side hole 922 at the mounting position of the first valve body 96. The first main hole 921 is connected to the bottom through hole 95. The first valve body 96 controls the opening and closing state of the first main hole 921. The first side hole 922 is connected to the first pipe opening 92. When the first valve body 96 is opened, the first main hole 921 is in the open state. Since the first main hole 921 is connected to the bottom through hole 95, water enters the valve seat 91 through the third pipe opening 94 and the bottom through hole 95 in sequence, and then enters the first pipe opening 92 through the first main hole 921 and the first side hole 922 to be discharged. When the first valve body 96 controls the first main hole 921 to be in the closed state, the water in the bottom through hole 95 cannot enter the first side hole 922 and the first pipe opening 92, so that the water cannot be discharged.

[0071] The valve seat 91 is provided with a second main hole 931 and a second side hole 932 at the mounting position of the second valve body 97. The second side hole 932 is connected to the bottom through hole 95. The second valve body 97 controls the opening and closing state of the second main hole 931. The second main hole 931 is connected to the second pipe port 93. When the second valve body 97 controls the second main hole 931 to be in the open state, gas or water enters the second main hole 931 and then exits through the second side hole 932 and the second pipe port 93. When the second valve body 97 controls the second main hole 931 to be in the closed state, the gas or some water in the second side hole 932 cannot enter the second pipe port 93, thus preventing the gas or some water from being discharged.

[0072] The integrated solenoid valve of the present invention is mainly used between the steam generator and the water tank or preheating furnace of an ironing equipment. The first valve body 96 and the second valve body 97 can be opened individually or simultaneously. The first port 92 is connected to the water inlet of the steam generator, the second port 93 is connected to the water tank or preheating furnace, and the third port 94 is connected to the outlet of the water pump. Because the steam pressure in the steam generator is high, if there is gas in the water input to the third port 94 when the first valve body 96 is opened, the gas in the water will remain in the bottom through hole 95 because the water pump cannot pressurize the air when pumping water. Therefore, the gas in the water will remain in the bottom through hole 95 and cannot be discharged into the steam generator from the first side hole 922. Thus, the first port 92 is used for drainage, and the second port 93 is used for drainage and venting.

[0073] In this embodiment, there are at least two first side holes 922, and both first side holes 922 are simultaneously connected to the first pipe opening 92, which increases the drainage capacity of the first pipe opening 92 within the limited space of the valve seat 91 and reduces the water replenishment time.

[0074] Specifically, the diameter of the first main hole 921 is larger than the diameter of the first side hole 922, allowing water to enter the first main hole 921 with a larger flow rate. The water pressure is used to allow the water to be smoothly discharged through the first side hole 922. The diameter of the second main hole 931 is larger than the diameter of the second side hole 932. Since the air pressure is relatively low during the drainage and exhaust process, the second side hole 932 increases the air pressure, allowing the air to enter the second side hole 932 smoothly. When the air is drawn out from the second side hole 932, due to the diffusion property of air, the air can be discharged to the second pipe opening 93 through the larger second main hole 931.

[0075] like Figure 12As shown, a processing hole 911 is also provided at the bottom through hole 95. A plug 912 is provided in the processing hole 911 to prevent the processing hole 911 from communicating with the outside, thereby preventing water flowing in from the third pipe port 94 from being discharged through the processing hole 911 and causing leakage, thus ensuring the use of the solenoid valve. In this embodiment, the processing hole 911 greatly simplifies the processing of the valve seat 91 and facilitates the processing of the bottom through hole 95, thereby reducing production costs.

[0076] like Figure 8 and Figure 10 As shown, both the first valve body 96 and the second valve body 97 are provided with connectors 98, which can allow the first valve body 96 and the second valve body 97 to conduct external control signals. Of course, they can also be connected to external electricity through built-in connecting wires (not shown in the figure). Both methods can determine whether the first valve body 96 and the second valve body 97 are energized and engaged. The specific method can be selected as needed, and there is no restriction here.

[0077] In an optional embodiment, there are at least two second ports 93 and second valve bodies 97, with the second valve body 97 located between two first valve bodies 96, such as... Figures 14 to 17 As shown, the bottom through hole 95 connects the second side hole 932 and the two first main holes 921, the second valve body 97 and the second main hole 931 of the other second valve body 97. Since the water enters in the same way as described above, it will not be repeated here.

[0078] Of course, in the integrated solenoid valve of the present invention, the main hole and side hole corresponding to the second port 93, the second valve body 97 and the valve seat 91 can be more than three. The specific number can be selected according to the needs. Each valve body can operate independently to control the flow of water and air, so that one port drains water and the other ports drain water and exhaust air.

[0079] Accordingly, there are at least two first pipe ports 92 and first valve bodies 96, and a second valve body 97 is located between the two first valve bodies 96 (not shown in the figure). The bottom through hole 95 connects the first main hole 921, the second side hole 932 of one second valve body 97 and the second main hole 931 of another second valve body 97, forming a two-position four-way solenoid valve and a one-in-three-out solenoid valve. Since the water entry method is the same as the above method, it will not be described again here.

[0080] Similarly, the main holes and side holes corresponding to the first port 92, the first valve body 96, and the valve seat 91 can be more than three, forming a solenoid valve of the type of one inlet and four outlets, five outlets, etc. Each valve body can operate independently to control the flow of water and air, so as to realize drainage and exhaust from one port and drainage from other ports.

[0081] Please continue reading. Figure 12 and Figure 16The first valve body 96 and the second valve body 97 both include an upper end cap 961, a coil 962, a valve sleeve 963, a valve core 964, a valve core spring 965, and a valve seal 966. One end of the valve sleeve 963 is connected to the valve seat 91, and the upper end cap 961 is fixed to the other end of the valve sleeve 963. The coil 962 is sleeved on the upper end cap 961 and the valve sleeve 963. The valve core 964 is disposed in the valve sleeve 963 and is spaced apart from the upper end cap 961. The valve core spring 965 is sleeved on the bottom end of the valve core 964, and the valve seal 966 is disposed on the sealing surface of the valve core 964.

[0082] When an external control signal energizes a connector 98, the corresponding coil 962 is energized, generating a magnetic field. This causes the upper end cap 961 in the coil 962 to attract the valve core 964, causing the valve core 964 to move upwards, thereby simultaneously moving the valve seal 966 upwards and opening the corresponding main orifice. When the coil 962 is de-energized, the upper end cap 961 loses its magnetic force and releases the valve core 964. The valve core 964 then resets synchronously due to the valve core spring 965, causing the valve seal 966 to seal the corresponding main orifice. Specifically, a sealing ring 967 is provided at the connection between the valve sleeve 963 and the valve seat 91 to prevent air or liquid leakage. Since the valve body is existing technology, it will not be described in detail here.

[0083] In this embodiment, the coil 962 of the first valve body 96 is larger than the coil 962 of the second valve body 97. Since the water pressure is relatively high when draining, the larger coil 962 causes the corresponding valve core 964 to be attracted, making the operation reliable. At the same time, the two coils of different sizes also play a foolproof role during installation, preventing the connection of the pipeline during installation and ensuring that the first pipe is connected to the water inlet of the steam generator.

[0084] In summary, the ironing equipment and its intelligent steam recovery system provided by the present invention, wherein the intelligent steam recovery system connects the steam outlet of the ironing device, the external water tank and the water pump, so that the steam discharged from the ironing device enters the energy-saving preheating furnace through the first one-way valve, so that the steam in the energy-saving preheating furnace will not flow back into the ironing device, thereby ensuring the heat of the steam in the ironing device. When the steam enters the energy-saving preheating furnace, it comes into full contact with the water in the furnace to achieve the purpose of heat exchange.

[0085] Furthermore, after the steam from the iron is heated in the energy-saving preheating furnace, it is discharged through the steam outlet via the first solenoid valve and transported to the water storage tank. This ensures the steam pressure balance in the energy-saving preheating furnace and also serves to pre-fill the water storage tank. When water needs to be added to the steam generator, the preheated water in the storage tank enters the energy-saving preheating furnace for heat exchange and then enters the steam generator through the water outlet and the second one-way valve. This prevents the steam generator from consuming steam and requiring additional water, as adding cold water would cause a significant drop in steam pressure, thus affecting the ironing effect.

[0086] This invention, through the second one-way valve, can prevent steam from flowing back into the energy-saving preheating furnace due to steam pressure when the energy-saving preheating furnace replenishes water to the steam generator, thus avoiding steam loss in the steam generator. This further ensures the stability of the steam pressure in the steam generator. At the same time, the second solenoid valve and water pump can automatically replenish the water in the storage tank into the energy-saving preheating furnace, thereby ensuring the water volume in the energy-saving preheating furnace. Moreover, during use, the water temperature in each furnace remains within a constant range.

[0087] This invention allows the steam from the ironing iron to directly exchange heat with the water in the energy-saving preheating furnace, maximizing the utilization of the steam's heat. Compared to existing methods that involve directly returning the steam to the water source or welding a U-shaped pipe to the water tank for heat exchange or conduction between steam and water, this invention has a higher heat utilization rate and is more energy-efficient.

[0088] This invention employs a Hall effect liquid level control device, which accurately senses the liquid level by the buoyancy of a float rising or falling. Since foam has no buoyancy, it can effectively avoid misjudgment caused by foam, making the liquid level control extremely precise.

[0089] Furthermore, this invention employs an integrated solenoid valve. When venting and / or draining is required, the second valve body connects the second port to the third port, allowing water and / or gas to enter the bottom through-hole of the valve seat through the third port and then exit through the second port. When draining is required, the first valve body connects the first port to the third port, allowing water to enter the bottom through-hole of the valve seat through the third port and then exit through the first port. This invention can simultaneously perform venting and draining operations. Compared to existing methods that require adding a T-junction and connecting two solenoid valves for diversion and then performing venting and draining separately, this invention features a simple structure, easy installation, reliable venting and draining operation, and also saves equipment costs.

[0090] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A steam intelligent recovery system for an ironing device, comprising connecting the steam vent of the iron, an external water tank, and a water pump, characterized in that, The device includes a first one-way valve, a second one-way valve, a first solenoid valve, a second solenoid valve, and at least one energy-saving preheating furnace. The energy-saving preheating furnace has a steam inlet, a steam outlet, a water inlet, and a water outlet. The steam outlet of the iron is connected to the steam inlet of the energy-saving preheating furnace through the first one-way valve. The steam outlet of the energy-saving preheating furnace is connected to the water inlet of the energy-saving preheating furnace in sequence through the first solenoid valve, a water tank, a water pump, and the second solenoid valve. The water outlet of the energy-saving preheating furnace is connected to the water inlet of the steam generator of the ironing equipment through the second one-way valve. The second solenoid valve is an integrated solenoid valve, which includes a valve seat. The valve seat has a first port for water discharge, a second port for water and / or gas discharge, a third port for water and / or gas entry into the valve seat, a first valve body, and a second valve body. The first port is connected to the water inlet of the steam generator, the second port is connected to the water tank or preheating furnace, and the third port is connected to the outlet of the water pump. The first port or the second port is connected to the third port through a bottom through hole. The first valve body is used to control the on / off state of the first port and the third port, and the second valve body is used to control the on / off state of the second port and the third port. When air is required to be vented and / or drained, the second valve body connects the second port to the third port, allowing water and / or air to enter the bottom through hole of the valve seat through the third port and then exit through the second port; when drainage is required, the first valve body connects the first port to the third port, allowing water to enter the bottom through hole of the valve seat through the third port and then exit through the first port. The valve seat is provided with a first main hole and a first side hole at the mounting position of the first valve body. The first main hole is connected to the bottom through hole. The first valve body controls the opening and closing state of the first main hole. The first side hole is connected to the first pipe opening. When the first valve body is opened, the first main hole is in the open state. Since the first main hole is connected to the bottom through hole, water enters the valve seat through the third pipe opening and the bottom through hole in sequence, and then enters the first pipe opening through the first main hole and the first side hole to be discharged. When the first valve body controls the first main hole to be in the closed state, the water in the bottom through hole cannot enter the first side hole and the first pipe opening, so that the water cannot be discharged. The valve seat is provided with a second main hole and a second side hole at the mounting position of the second valve body. The second side hole is connected to the bottom through hole. The second valve body controls the opening and closing state of the second main hole. The second main hole is connected to the second pipe opening. When the second valve body controls the second main hole to be in the open state, gas or water enters the second main hole and then exits through the second side hole and the second pipe opening. When the second valve body controls the second main hole to be in the closed state, the gas or some water in the second side hole cannot enter the second pipe opening, thus preventing the gas or some water from being discharged.

2. The intelligent steam recovery system for ironing equipment according to claim 1, characterized in that, The first solenoid valve is a normally open solenoid valve.

3. A steam intelligent recovery system for an ironing device, comprising connecting the steam vent of the iron, an external water tank, and a water pump, characterized in that, The device includes a first one-way valve, a second one-way valve, a first solenoid valve, a second solenoid valve, a first energy-saving preheating furnace, and a second energy-saving preheating furnace. The first energy-saving preheating furnace is equipped with a steam inlet, a steam and water inlet, and a water outlet. The second energy-saving preheating furnace is equipped with a steam and water inlet, a steam outlet, and a water inlet. The steam outlet of the iron is connected to the steam inlet of the first energy-saving preheating furnace through the first one-way valve. The steam and water inlet of the first energy-saving preheating furnace is connected to the steam and water inlet of the second energy-saving preheating furnace. The water outlet of the first energy-saving preheating furnace is connected to the water inlet of the steam generator of the ironing equipment through the second one-way valve. The steam outlet of the second energy-saving preheating furnace is connected to the water inlet of the second energy-saving preheating furnace in sequence through the first solenoid valve, a water tank, a water pump, and the second solenoid valve. The second solenoid valve is an integrated solenoid valve, which includes a valve seat. The valve seat has a first port for water discharge, a second port for water and / or gas discharge, a third port for water and / or gas entry into the valve seat, a first valve body, and a second valve body. The first port is connected to the water inlet of the steam generator, the second port is connected to the water tank or preheating furnace, and the third port is connected to the outlet of the water pump. The first port or the second port is connected to the third port through a bottom through hole. The first valve body is used to control the on / off state of the first port and the third port, and the second valve body is used to control the on / off state of the second port and the third port. When air is required to be vented and / or drained, the second valve body connects the second port to the third port, allowing water and / or air to enter the bottom through hole of the valve seat through the third port and then exit through the second port; when drainage is required, the first valve body connects the first port to the third port, allowing water to enter the bottom through hole of the valve seat through the third port and then exit through the first port. The valve seat is provided with a first main hole and a first side hole at the mounting position of the first valve body. The first main hole is connected to the bottom through hole. The first valve body controls the opening and closing state of the first main hole. The first side hole is connected to the first pipe opening. When the first valve body is opened, the first main hole is in the open state. Since the first main hole is connected to the bottom through hole, water enters the valve seat through the third pipe opening and the bottom through hole in sequence, and then enters the first pipe opening through the first main hole and the first side hole to be discharged. When the first valve body controls the first main hole to be in the closed state, the water in the bottom through hole cannot enter the first side hole and the first pipe opening, so that the water cannot be discharged. The valve seat is provided with a second main hole and a second side hole at the mounting position of the second valve body. The second side hole is connected to the bottom through hole. The second valve body controls the opening and closing state of the second main hole. The second main hole is connected to the second pipe opening. When the second valve body controls the second main hole to be in the open state, gas or water enters the second main hole and then exits through the second side hole and the second pipe opening. When the second valve body controls the second main hole to be in the closed state, the gas or some water in the second side hole cannot enter the second pipe opening, thus preventing the gas or some water from being discharged.

4. The intelligent steam recovery system for ironing equipment according to claim 3, characterized in that, At least one third energy-saving preheating furnace is connected in series between the first energy-saving preheating furnace and the second energy-saving preheating furnace. The third energy-saving preheating furnace is provided with a steam inlet and a water outlet and a steam outlet and a water inlet. The steam inlet and water outlet of the third energy-saving preheating furnace are connected to the steam outlet and water inlet of the first energy-saving preheating furnace, and the steam outlet and water inlet of the third energy-saving preheating furnace are connected to the steam inlet and water outlet of the second energy-saving preheating furnace.

5. The intelligent steam recovery system for ironing equipment according to claim 4, characterized in that, The steam outlet and water inlet of the previous energy-saving preheating furnace are connected to the steam inlet and water outlet of the next energy-saving preheating furnace through insulation pipes.

6. The intelligent steam recovery system for ironing equipment according to any one of claims 3-5, characterized in that, Each energy-saving preheating furnace is made of stainless steel, aluminum, or copper.

7. The intelligent steam recovery system for ironing equipment according to claim 6, characterized in that, Each energy-saving preheating furnace is equipped with an insulation layer on its outer side.

8. An ironing device, comprising a steam generator, an iron, a water tank, and a water pump, wherein the steam generator is connected to the iron, characterized in that, It also includes the intelligent steam recovery system as described in any one of claims 1-7, wherein the steam outlet of the iron is connected to the steam inlet of the intelligent steam recovery system via a steam return pipe, the steam outlet of the intelligent steam recovery system is connected to the water inlet of the intelligent steam recovery system via a first solenoid valve, a water tank, a water pump, and a second solenoid valve in sequence, and the water outlet of the intelligent steam recovery system is connected to the water inlet of the steam generator.

9. The ironing device according to claim 8, characterized in that, The steam generator is equipped with a liquid level control device, which includes a detection isolation and protection tube, a float, and a Hall circuit control board. The Hall circuit control board is disposed in the detection isolation and protection tube, and the float is slidably sleeved on the detection isolation and protection tube. The detection isolation and protection tube is provided with a first retaining ring to control the rising height of the float, and the float is located below the first retaining ring. The detection isolation and protection tube is also provided with a Hall element, and the float is provided with a Hall sensor adapted to the Hall element. The Hall element is electrically connected to the Hall circuit control board.

10. The ironing device according to claim 9, characterized in that, The float includes an upper shell, a lower shell, and a stainless steel sleeve. Both the upper shell and the lower shell have a connecting hole in the middle. The upper shell and the lower shell are sealed together, and the connecting hole is connected by the stainless steel sleeve to form a sphere with a through hole in the middle. The Hall sensor is sleeved on the stainless steel sleeve.

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