Steam generating system and steam cleaning machine

Abstract

The present application discloses a steam generation system, including a heating unit, a liquid supply unit, a steam ejection assembly and a control assembly, wherein the heating unit has a liquid inlet and a liquid outlet, the liquid supply unit is connected to the liquid inlet, and is used to provide a liquid medium to the heating unit, the heating unit is used to heat the liquid medium to generate steam, the steam ejection assembly is arranged at the liquid outlet, and is used to eject the steam generated by the heating unit; the control assembly is arranged between the steam ejection assembly and the liquid outlet, and is used to close the liquid outlet when the liquid medium in the heating unit is in a liquid state, and to open the liquid outlet when the liquid medium in the heating unit is completely vaporized, so as to eject steam. The present application also discloses a steam cleaning machine including the above steam generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning tools, and in particular to a steam generating system and a steam cleaning machine. Background Art

[0002] Steam cleaner is a highly efficient cleaning device. Its main working principle is to generate high-temperature and high-pressure steam by heating water, and use the impact force and thermal effect of steam to accelerate the destruction of the binding force between stains, thereby removing various stubborn stains. It is widely used in household cleaning, industrial cleaning, medical and health fields.

[0003] In the related art, a steam cleaner is generally composed of a motor, a boiler, a water pump, a clean and dirty water tank, a brush head, a control circuit and other components. Since the boiler of a steam cleaner has a preheating process, that is, it takes a certain amount of time to heat from a cold state to the working temperature, the steam cleaner usually sprays cold water instead of steam in the first ten or even dozens of seconds after it is started, which causes inconvenience to the user and may also cause the cold water flow to have an adverse effect on certain items that are not suitable for water cleaning. In addition, the cold water discharged during the preheating process also causes a certain amount of water resource waste, reducing the efficiency of the steam cleaner. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a steam generating system and a steam cleaning machine, which can realize the function of spraying steam and improve the user experience.

[0005] The present invention provides a steam generating system, comprising a heating unit, a liquid supply unit, a steam ejection assembly and a control assembly, wherein the heating unit has a liquid inlet and a liquid outlet, the liquid supply unit is connected to the liquid inlet and is used to provide a liquid medium to the heating unit, the heating unit is used to heat the liquid medium to generate steam, and the steam ejection assembly is arranged at the liquid outlet and is used to eject the steam generated by the heating unit; The control component is arranged between the steam ejection component and the liquid outlet, and is used to close the liquid outlet when the liquid medium in the heating unit is in liquid state, and to open the liquid outlet when the liquid medium in the heating unit is completely vaporized, thereby ejecting steam.

[0006] In one embodiment, the control assembly comprises a first water retaining member movably mounted between the steam ejection assembly and the liquid outlet and an elastic restoring member connected to an end of the first water retaining member away from the liquid outlet, and the other end of the restoring member is connected to the steam ejection assembly; The reset member is used to press the first water retaining member against the liquid outlet and close the liquid outlet when the liquid medium in the heating unit is in liquid state, and to shrink under the pressure of steam when the liquid medium in the heating unit is completely vaporized, so that the first water retaining member moves away from the liquid outlet and opens the liquid outlet.

[0007] In one embodiment, the first water retaining member is provided with a water retaining portion for blocking liquid at one end close to the liquid outlet, and a first installation cavity for installing the reset member is provided at one end of the first water retaining member away from the liquid outlet. The first water retaining member is provided with a plurality of guide grooves for guiding steam along the circumferential direction.

[0008] In one embodiment, the heating unit includes a heating furnace body and a pressure sensor disposed in the heating furnace body, and the control component includes a solenoid valve and a control unit disposed on the liquid outlet, and the control unit is respectively connected to the solenoid valve and the pressure sensor for communication; The control unit is used to close the valve of the solenoid valve when the pressure value detected by the pressure sensor is within a preset first pressure range, thereby closing the liquid outlet, and to open the valve of the solenoid valve when the pressure value detected by the pressure sensor is within a preset second pressure range, thereby opening the liquid outlet.

[0009] In one embodiment, the control component includes a second water retaining member having magnetic properties, which is movably mounted between the steam ejection component and the liquid outlet, and is used for being adsorbed at the liquid outlet to close the liquid outlet when the liquid medium in the heating unit is in liquid state, and for moving away from the liquid outlet to open the liquid outlet under the pressure of the steam when the liquid medium in the heating unit is completely vaporized.

[0010] In one embodiment, the heating unit includes a heating furnace body, a pressure sensor disposed in the heating furnace body, and a conductive winding wound around the heating furnace body, the control component includes a third water retaining member, a control unit, and a power interface, the control unit is communicatively connected to the pressure sensor, and the conductive winding is electrically connected to the power interface through the control unit; The control unit is used to connect the conductive winding with the power interface when the pressure value detected by the pressure sensor is within a preset first pressure range, so that the conductive winding is energized to generate a magnetic field, thereby adsorbing the third water retaining member at the liquid outlet to close the liquid outlet, and disconnecting the conductive winding from the power interface when the pressure value detected by the pressure sensor is within a preset second pressure range, so that the third water retaining member loses adsorption of the magnetic field and leaves the liquid outlet, thereby opening the liquid outlet.

[0011] In one embodiment, the second pressure range is a pressure range detected by the pressure sensor when the liquid medium in the heating furnace body is completely vaporized, and a lower limit pressure of the second pressure range is greater than an upper limit pressure of the first pressure range.

[0012] In one embodiment, the control component also includes a one-way diaphragm and a limit plate. A second installation cavity is opened at one end of the third water retaining member away from the liquid outlet. The one-way diaphragm can be movably installed in the second installation cavity. The limit plate is fixed at one end of the second installation cavity for limiting the one-way diaphragm in the second installation cavity.

[0013] In one embodiment, a first water hole is formed at one end of the third water retaining member close to the liquid outlet, the one-way diaphragm includes an outer diaphragm and an inner diaphragm, a water groove is formed between the outer diaphragm and the inner diaphragm, and a second water hole is formed on the limiting plate, and the diameter of the first water hole is greater than the diameter of the inner diaphragm, and the diameter of the inner diaphragm is greater than the diameter of the second water outlet.

[0014] The present invention also provides a steam cleaning machine, comprising the above-mentioned steam generating system.

[0015] A steam generating system provided by the present invention avoids the problem of cold water spraying caused by the preheating time of the heating unit by controlling the timing of steam spraying by the control component, greatly improves the user experience, meets the actual demand for quick steam acquisition, and eliminates the phenomenon of cold water discharge in the preheating stage, significantly reduces the waste of water resources, and makes the system operation more efficient and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 An overall schematic diagram of a steam generation system provided in accordance with the first embodiment of the present invention.

[0018] Figure 2 An internal view of a steam generating system provided in accordance with a first embodiment of the present invention.

[0019] Figure 3 A schematic diagram of the structure of a control component provided in the first embodiment of the present invention.

[0020] Figure 4An exploded view of a steam generating system provided in accordance with a first embodiment of the present invention.

[0021] Figure 5 A schematic structural diagram of a first water retaining member provided in the first embodiment of the present invention.

[0022] Figure 6 A schematic diagram of the structure of a control component provided in the second embodiment of the present invention.

[0023] Figure 7 A schematic diagram of the structure of a control component provided in the third embodiment of the present invention.

[0024] Figure 8 An overall schematic diagram of a steam generating system provided in accordance with a fourth embodiment of the present invention.

[0025] Fig. 9 A schematic diagram of the structure of a control component provided in the fifth embodiment of the present invention.

[0026] Fig.10 A schematic structural diagram of a third water retaining member provided in the fifth embodiment of the present invention.

[0027] Reference numerals: 1. Heating unit; 2. Control component; 3. Liquid supply unit; 4. Steam ejection component; 11. Heating furnace body; 12. Liquid inlet; 13. Liquid outlet; 14. Conductive winding; 21. First water retaining member; 22. Reset member; 23. Solenoid valve; 24. Second water retaining member; 25. Third water retaining member; 26. One-way diaphragm; 27. Limiting plate; 211. Water retaining part; 212. First installation cavity; 213. Guide groove; 251. First water through hole; 252. Second installation cavity; 261. Outer diaphragm; 262. Inner diaphragm; 263. Water through groove; 271. Second water through hole. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] The terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0032] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0033] First embodiment Please refer to Figures 1 to 5 A steam generating system provided in a first embodiment of the present invention comprises a heating unit 1, a liquid supply unit 3, a steam ejection assembly 4 and a control assembly 2. The heating unit 1 comprises a heating furnace body 11, the heating furnace body 11 has a liquid inlet 12 and a liquid outlet 13, the liquid supply unit 3 is connected to the liquid inlet 12, and is used to provide a liquid medium to the heating unit 1, the steam ejection assembly 4 is arranged at the liquid outlet 13, and is used to eject the steam generated by the heating unit 1; the control assembly 2 is arranged between the steam ejection assembly 4 and the liquid outlet 13, and is used to close the liquid outlet 13 when the liquid medium in the heating unit 1 is in a liquid state, and to open the liquid outlet 13 when the liquid medium in the heating unit 1 is completely vaporized, so as to eject steam. Specifically, the control component 2 includes a first water baffle 21 and a reset component 22. The first water baffle 21 can be movably installed between the steam spray component 4 and the liquid outlet 13. The reset component 22 is arranged between the first water baffle 21 and the steam spray component 4, and is used to provide elastic force and press the first water baffle 21 onto the liquid outlet 13.

[0034] In this embodiment, the pressure provided by the liquid supply unit 3 is greater than the pressure after the liquid medium in the heating unit 1 is completely vaporized, so as to prevent the liquid medium from flowing back. The elastic force provided by the reset member 22 is greater than the pressure provided by the liquid supply unit 3, and is less than the sum of the pressures after the liquid medium in the liquid supply unit 3 and the heating unit 1 is completely vaporized. When the liquid medium in the heating unit 1 is in a liquid state, the elastic force provided by the reset member 22 presses the first water retaining member 21 against the liquid outlet 13 to close the liquid outlet 13; when the liquid medium in the heating unit 1 is completely vaporized and the pressure in the system reaches a certain value, the pressure overcomes the elastic force of the reset member 22, pushing the first water retaining member 21 away from the liquid outlet 13, thereby opening the liquid outlet 13 and realizing the ejection of steam.

[0035] Preferably, a water retaining portion 211 is provided at one end of the first water retaining member 21, and the size of the water retaining portion 211 should be larger than the diameter of the above-mentioned liquid outlet 13, so that when the liquid medium in the heating unit 1 is in liquid state, it can effectively block the passage of the liquid medium, ensure that the liquid outlet 13 is completely closed, and avoid the liquid liquid medium from spraying out. A first installation cavity 212 is provided at the other end of the first water retaining member 21, and one end of the reset member 22 is fixed in the first installation cavity 212 to provide a reset force for the first water retaining member 21, so that the first water retaining member 21 can switch between a compressed and a loosened state. The first installation cavity 212 is provided with a plurality of first guide grooves 213 along the circumference. When steam is sprayed out, the plurality of first guide grooves 213 can provide a plurality of flow paths for the steam spraying component 4 to spray steam, effectively reducing the flow resistance of the steam when passing through the first water retaining member 21, thereby reducing the energy loss during the spraying process. In addition, the uniform distribution of the guide grooves 213 can guide the flow direction of the steam, making its injection more concentrated and stable, and avoiding the weakening of the injection effect due to turbulence or uneven local pressure.

[0036] In this embodiment, the reset member 22 can be a spring or other elements that can provide elastic restoring force, such as a rubber member, a bellows or a composite material component with elastic properties. As long as it can provide sufficient elastic force when the liquid medium in the system is in a liquid state, the first water retaining member 21 can be pressed against the liquid outlet 13, and when the pressure in the system increases to a certain value, the elastic force can be overcome to make the first water retaining member 21 leave the liquid outlet 13. No sole limitation is made here.

[0037] Second embodiment Please refer to Figure 6 The difference between the steam generation system provided by the second embodiment of the present invention and the first embodiment is that, in the present embodiment, a pressure sensor is provided in the heating furnace body 11 to monitor the pressure in the heating furnace body 11, and the control component 2 includes a solenoid valve 23 and a control unit. The solenoid valve 23 is provided on the liquid outlet 13, and the control unit is respectively connected to the solenoid valve 23 and the pressure sensor for communication, and controls the opening and closing of the valve of the solenoid valve 23 according to the pressure value of the pressure sensor, thereby realizing the opening and closing of the liquid outlet 13.

[0038] In this embodiment, a first pressure range and a second pressure range are preset. The first pressure range is the pressure range detected by the pressure sensor when the liquid medium in the heating furnace body 11 is in liquid state, and the second pressure range is the pressure range detected by the pressure sensor when the liquid medium in the heating furnace body 11 is completely vaporized. The lower limit pressure of the second pressure range is greater than the upper limit pressure of the first pressure range. When the pressure value detected by the pressure sensor is within the first pressure range, the liquid medium in the heating furnace body 11 is not completely vaporized. At this time, the control unit sends a signal to control the solenoid valve 23 to close, and the liquid outlet 13 is closed to prevent the liquid medium from spraying out; when the pressure value reaches the second pressure range, the liquid medium in the heating furnace body 11 is completely vaporized. At this time, the control unit sends a signal to control the solenoid valve 23 to open, so as to realize the spraying out of steam.

[0039] Compared with the first embodiment, this embodiment does not need to rely on mechanical elastic elements, which reduces the performance degradation problem caused by elastic fatigue, and realizes automatic operation, thereby improving the stability of system operation. In addition, the use of electronic control makes it easy to flexibly adjust the pressure range according to different working conditions, thereby enhancing the adaptability of the system.

[0040] Third embodiment Please refer to Figure 7 , the difference between a steam generating system provided by the third embodiment of the present invention and the first embodiment mentioned above is that, in this embodiment, the control component 2 includes a second water retaining member 24 having magnetic properties, and the second water retaining member 24 can be movably installed between the steam ejection component 4 and the liquid outlet 13. Specifically, the outer shell of the heating furnace body 11 is made of silicon steel and other materials that can be adsorbed by magnets, and the magnetic force of the second water retaining member 24 should be greater than the pressure provided by the liquid supply unit 3, and less than the sum of the pressures of the liquid medium in the liquid supply unit 3 and the heating unit 1 after complete vaporization. When the liquid medium in the heating furnace body 11 is in liquid state, the second water retaining member 24 is adsorbed on the liquid outlet 13 under the action of magnetic force, and the liquid outlet 13 is closed. When the liquid medium is completely vaporized, the pressure in the heating furnace body 11 rises rapidly, thereby overcoming the magnetic force and pushing the second water retaining member 24 away from the liquid outlet 13, opening the liquid outlet 13, and realizing the ejection of steam.

[0041] Compared with the first embodiment, the magnetic second water retaining member 24 in this embodiment does not need to install a spring or other reset member 22, which reduces the number of mechanical parts and makes the overall structure more concise. At the same time, magnetic control has a faster response speed than elastic control, and can quickly adjust the opening and closing state of the liquid outlet 13 according to the pressure change in the heating unit 1, further improving the efficiency of the system.

[0042] Fourth embodiment Please refer to Figure 8, the difference between a steam generating system provided by the fourth embodiment of the present invention and the above-mentioned second embodiment is that, in this embodiment, a conductive winding 14 is wound on the heating furnace body 11, and the control component 2 includes a third water retaining member 25, a control unit and a power interface. Among them, the third water retaining member 25 is arranged between the liquid outlet 13 and the steam ejection component 4, the conductive winding 14 is electrically connected to the power interface through the control unit, and the control unit is communicatively connected to the pressure sensor, and the conductive winding 14 is connected or disconnected from the power interface according to the pressure value of the pressure sensor. Specifically, the third water retaining member 25 can be magnetically adsorbed, and the magnetic field force generated by the power supply unit 3 should be greater than the pressure provided by the liquid supply unit 3, and less than the sum of the pressures of the liquid medium in the liquid supply unit 3 and the heating unit 1 after complete vaporization.

[0043] When the pressure value detected by the pressure sensor is within the first pressure range, the control unit connects the conductive winding 14 to the power interface, and the conductive winding 14 is energized to generate a magnetic field, which adsorbs the third water retaining member 25 to the liquid outlet 13 and closes the liquid outlet 13; when the pressure value reaches the second pressure range, the control unit disconnects the conductive winding 14 from the power interface, and the third water retaining member 25 loses the magnetic field adsorption and moves away from the liquid outlet 13 under the action of pressure, thereby opening the liquid outlet 13 and realizing the spraying of steam.

[0044] Compared with the second embodiment, this embodiment uses the magnetic field generated by the conductive winding 14 to control the adsorption of the third water retaining member 25, thereby avoiding the problem that the mechanical action parts in the traditional solenoid valve 23 may be worn, stuck or malfunction due to long-term use, and improving stability. At the same time, the magnitude of the magnetic field force can be flexibly controlled by adjusting the current intensity of the conductive winding 14, which can adapt to a wider pressure range and meet the steam generation requirements in different application scenarios.

[0045] In addition, the control unit of this embodiment controls the power-on state of the conductive winding 14, and can also realize the switching between the cold water mode and the steam mode. When the system needs to switch to the cold water mode, the control unit disconnects the connection between the conductive winding 14 and the power interface, the conductive winding 14 is in a power-off state, the magnetic field disappears, and the third water retaining member 25 is no longer attracted by the magnetic force. In this state, the liquid medium can be directly sprayed through the steam spraying assembly 4 to realize the cold water spraying function.

[0046] Fifth embodiment Please refer to Figure 9-10 The difference between the steam generation system provided in the fifth embodiment of the present invention and the fourth embodiment is that in this embodiment, in order to completely remove the liquid medium in the pipeline when switching between the cold water mode and the steam mode, the liquid supply unit 3 includes a DC electromagnetic pump and a commutator. Specifically, the commutator is used to change the current direction of the electromagnetic pump when the cold water mode is turned off to realize the back suction function of the system.

[0047] When the liquid medium is back-sucked, the third water retaining member 25 will re-adhere to the liquid outlet 13 under the impact force of the liquid medium and block the liquid outlet 13, thereby preventing the liquid medium from being back-sucked into the heating furnace body 11. Therefore, in this embodiment, the control component 2 also includes a one-way diaphragm 26 and a limiting plate 27. A second installation cavity 252 is provided at one end of the third water retaining member 25 away from the liquid outlet 13 for installing the one-way diaphragm 26. The one-way diaphragm 26 is movably arranged in the second installation cavity 252, and the other end thereof is fixed to one side of the second installation cavity 252 by the limiting plate 27. A first water flow hole 251 is provided at one end of the third water retaining member 25 close to the liquid outlet 13, the one-way diaphragm 26 includes an outer diaphragm 261 and an inner diaphragm 262, a water flow groove 263 is provided between the outer diaphragm 261 and the inner diaphragm 262, a second water flow hole 271 is provided on the limiting plate 27, the diameter of the first water flow hole 251 is larger than the diameter of the inner diaphragm 262, and the diameter of the inner diaphragm 262 is larger than the diameter of the second water flow hole 271.

[0048] In the steam mode, when the pressure value detected by the pressure sensor is within the first pressure range, the control unit connects the conductive winding 14 to the power interface, and the conductive winding 14 is energized to generate a magnetic field, which attracts the third water retaining member 25 to the liquid outlet 13. At this time, the liquid flowing out of the liquid outlet 13 flows into the second installation cavity 252 through the first water hole 251, and the one-way diaphragm 26 fits with the limiting plate 27 under the impact of the liquid. Since the diameter of the inner diaphragm 262 is larger than the diameter of the second water hole 271, the second water hole 271 will be closed by the fitted inner diaphragm 262, thereby preventing the liquid liquid medium from flowing out; when the pressure value reaches the second pressure range, the control unit disconnects the conductive winding 14 from the power interface, and the third water retaining member 25 loses the magnetic field adsorption, and moves away from the liquid outlet 13 under the action of pressure, thereby opening the liquid outlet 13 to achieve spraying, i.e. steam.

[0049] In the cold water mode, the control unit is set with a delayed shutdown. After the shutdown button is pressed, the commutator starts, the DC electromagnetic pump runs in reverse, and the liquid medium retained in the steam ejection component 4 passes through the second water hole 271, pushes the one-way diaphragm 26 open, and passes through the water groove 263 and the first water hole 251 in turn, and is pumped back to the heating unit 1 or the liquid supply unit 3, thereby effectively avoiding the influence of the liquid medium retained in the steam ejection component 4 on the operation of the steam mode.

[0050] Sixth embodiment The present invention also provides a steam cleaning machine, comprising a steam generating system according to any one of the above embodiments.

[0051] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0052] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A steam generating system, characterized in that: The invention comprises a heating unit (1), a liquid supply unit (3), a steam ejection assembly (4) and a control assembly (2); the heating unit (1) has a liquid inlet (12) and a liquid outlet (13); the liquid supply unit (3) is connected to the liquid inlet (12) and is used to provide a liquid medium to the heating unit (1); the heating unit (1) is used to heat the liquid medium to generate steam; the steam ejection assembly (4) is arranged at the liquid outlet (13) and is used to eject the steam generated by the heating unit (1); The control component (2) is arranged between the steam ejection component (4) and the liquid outlet (13), and is used to close the liquid outlet (13) when the liquid medium in the heating unit (1) is in a liquid state, and to open the liquid outlet (13) when the liquid medium in the heating unit (1) is completely vaporized, thereby ejecting steam.

2. The steam generating system according to claim 1, characterized in that: The control component (2) comprises a first water retaining member (21) movably mounted between the steam ejection component (4) and the liquid outlet (13), and an elastic restoring member (22) connected to an end of the first water retaining member (21) away from the liquid outlet (13), the other end of the restoring member (22) being connected to the steam ejection component (4); The resetting member (22) is used to press the first water retaining member (21) against the liquid outlet (13) and close the liquid outlet (13) when the liquid medium in the heating unit (1) is in a liquid state, and to shrink under the pressure of the steam when the liquid medium in the heating unit (1) is completely vaporized, so that the first water retaining member (21) moves away from the liquid outlet (13) and opens the liquid outlet (13).

3. The steam generating system according to claim 2, characterized in that: The first water retaining member (21) is provided with a water retaining portion (211) for retaining liquid at one end close to the liquid outlet (13), and a first mounting cavity (212) for mounting the reset member (22) is provided at one end of the first water retaining member (21) away from the liquid outlet (13). The first water retaining member (21) is provided with a plurality of guide grooves (213) for guiding steam along the circumferential direction.

4. The steam generating system according to claim 1, characterized in that: The heating unit (1) comprises a heating furnace body (11) and a pressure sensor arranged in the heating furnace body (11); the control component (2) comprises a solenoid valve (23) and a control unit arranged on the liquid outlet (13); the control unit is respectively connected to the solenoid valve (23) and the pressure sensor for communication; The control unit is used to close the valve of the solenoid valve (23) when the pressure value detected by the pressure sensor is within a preset first pressure range, thereby closing the liquid outlet (13); and to open the valve of the solenoid valve (23) when the pressure value detected by the pressure sensor is within a preset second pressure range, thereby opening the liquid outlet (13).

5. The steam generating system according to claim 1, characterized in that: The control component (2) comprises a second water retaining member (24) having magnetic properties. The second water retaining member (24) is movably mounted between the steam ejection component (4) and the liquid outlet (13), and is used to be adsorbed on the liquid outlet (13) to close the liquid outlet (13) when the liquid medium in the heating unit (1) is in a liquid state, and to be moved away from the liquid outlet (13) under the pressure of the steam to open the liquid outlet (13) when the liquid medium in the heating unit (1) is completely vaporized.

6. The steam generating system according to claim 1, characterized in that: The heating unit (1) comprises a heating furnace body (11), a pressure sensor arranged in the heating furnace body (11), and a conductive winding (14) wound around the heating furnace body (11); the control component (2) comprises a third water retaining member (25), a control unit, and a power supply interface; the control unit is communicatively connected to the pressure sensor; and the conductive winding (14) is electrically connected to the power supply interface via the control unit; The control unit is used to connect the conductive winding (14) to the power interface when the pressure value detected by the pressure sensor is within a preset first pressure range, so that the conductive winding (14) is energized to generate a magnetic field, thereby adsorbing the third water retaining member (25) at the liquid outlet (13) to close the liquid outlet (13); and disconnecting the conductive winding (14) from the power interface when the pressure value detected by the pressure sensor is within a preset second pressure range, so that the third water retaining member (25) loses the adsorption of the magnetic field and leaves the liquid outlet (13), thereby opening the liquid outlet (13).

7. The steam generating system according to claim 4 or 6, characterized in that: The second pressure range is a pressure range detected by the pressure sensor when the liquid medium in the heating furnace body (11) is completely vaporized, and the lower limit pressure of the second pressure range is greater than the upper limit pressure of the first pressure range.

8. The steam generating system according to claim 6, characterized in that: The control component (2) further comprises a one-way diaphragm (26) and a limiting plate (27); a second mounting cavity (252) is provided at one end of the third water retaining member (25) away from the liquid outlet (13); the one-way diaphragm (26) is movably mounted in the second mounting cavity (252); and the limiting plate (27) is fixed at one end of the second mounting cavity (252) for limiting the one-way diaphragm (26) in the second mounting cavity (252).

9. The steam generating system according to claim 8, characterized in that: The third water retaining member (25) is provided with a first water passage hole (251) at one end close to the liquid outlet (13); the one-way diaphragm (26) comprises an outer diaphragm (261) and an inner diaphragm (262); a water passage groove (263) is provided between the outer diaphragm (261) and the inner diaphragm (262); the limiting plate (27) is provided with a second water passage hole (271); the diameter of the first water passage hole (251) is greater than the diameter of the inner diaphragm (262); and the diameter of the inner diaphragm (262) is greater than the diameter of the second water passage hole.

10. A steam cleaning machine, characterized in that: Comprising a steam generating system as described in any one of claims 1-9.

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