Steam cleaning equipment and safe use method thereof

Abstract

The invention discloses steam cleaning equipment and a safe use method. The equipment comprises a steam shell, a steam boiler assembly, a cleaning head accessory, an electromagnetic switch valve, a first electric connection terminal assembly, a second electric connection terminal assembly, a steam detection sensor, a temperature detection sensor and an integrated power supply interface. The steam shell is provided with a water adding port and a steam outlet port, the steam boiler assembly is connected with the two ports, the cleaning head accessory is detachably connected with the steam outlet port, and the electromagnetic switch valve is arranged at the steam outlet. The first terminal assembly and the second terminal assembly are respectively arranged at a steam outlet port and a cleaning head accessory, and the steam detection sensor and the temperature detection sensor are respectively arranged at the top and the bottom of the steam boiler assembly and form a detection circuit with the electromagnetic switch valve through wire harnesses; and the integrated power supply interface supplies power to each component. According to the invention, the use safety is improved through multi-circuit detection.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, specifically to a steam cleaning device with multiple safety detection functions and its safe usage method. Background Technology

[0002] Steam cleaning equipment achieves its cleaning function by generating high-temperature, high-pressure steam and is widely used in homes, commercial spaces, and other settings.

[0003] A prior art example, referring to patent document CN219331505U, discloses a steam cleaning host that is easy to turn, including a steam shell with a water inlet port and a steam outlet port; a steam boiler connected to the water inlet port and the steam outlet port respectively through pipelines; a spherical adapter is provided at the steam outlet port, the front end of the spherical adapter is connected to a steam outlet hose, and the two sides of the spherical adapter form a rotational engagement with the steam shell through a horizontal rotating shaft, so that the spherical adapter can rotate vertically; a guide wheel assembly is provided at the bottom of the steam shell, and the guide wheel assembly forms a rotational engagement with the steam shell through a vertical rotating shaft, so that the guide wheel assembly can rotate horizontally.

[0004] Existing steam cleaning equipment typically includes a steam generator and a cleaning head, but its safety control mechanism is relatively simple, mainly relying on single temperature or pressure protection, which has the following shortcomings: unreliable connection between the cleaning head accessory and the main unit may lead to steam leakage, posing a safety hazard; lack of real-time monitoring of steam quality (temperature, saturation) affects cleaning effect and safety; single temperature and pressure monitoring points make it difficult to comprehensively reflect the equipment's operating status; and the power supply and control lines are scattered and have low integration, affecting equipment reliability.

[0005] Therefore, there is a need for a steam cleaning device that has multiple safety detection mechanisms, high integration, and is safe to use. Summary of the Invention

[0006] This invention aims to solve the problems of imperfect safety detection mechanisms, low integration, and insufficient safety in the use of existing steam cleaning equipment, and provides a steam cleaning equipment with multiple detection circuits, high safety and reliability, and a safe way to use it.

[0007] The technical solution of this invention to solve its technical problem is: a steam cleaning device, comprising:

[0008] A steam casing having a water inlet port and a steam outlet port;

[0009] A steam boiler assembly is disposed inside a steam shell, and the steam boiler assembly is connected to the water inlet and steam outlet respectively through internal pipes.

[0010] A cleaning head attachment, which is detachably connected to the steam outlet port;

[0011] An electromagnetic switching valve is configured at the steam outlet.

[0012] A first electrical connection terminal assembly and a second electrical connection terminal assembly, wherein the first electrical connection terminal assembly is disposed in the steam outlet port, and the second electrical connection terminal assembly is disposed in the cleaning head accessory, and the first electrical connection terminal assembly is connected to the electromagnetic switch valve via a first wiring harness, thereby forming a first detection circuit between the electromagnetic switch valve and the cleaning head accessory;

[0013] A steam detection sensor is provided. A steam detection port is provided on the top of the steam boiler assembly. The steam detection sensor is installed at the steam detection port. The steam detection sensor is connected to the electromagnetic switch valve through a second wiring harness so that a second detection circuit is formed between the electromagnetic switch valve and the steam detection sensor.

[0014] A temperature detection sensor is disposed at the bottom of the steam boiler assembly. The temperature detection sensor is connected to the electromagnetic switch valve via a third wiring harness, so that a third detection circuit is formed between the electromagnetic switch valve and the temperature detection sensor.

[0015] An integrated power supply interface is installed on the steam shell. The integrated power supply interface is electrically connected to the electromagnetic switch valve, the steam detection sensor, and the temperature detection sensor through internal cables, and is also electrically connected to an external power source through an external cable.

[0016] In a preferred embodiment of the present invention, the cleaning head accessory includes a universal adapter and several nozzle bodies of different shapes. The nozzle bodies are connected to the steam outlet port via the universal adapter, and the second electrical connection terminal assembly is disposed in the universal adapter.

[0017] Specifically, a plug-in assembly is provided at the steam outlet port. The plug-in assembly includes a plug-in base and a flip cover rotatably connected to the plug-in base. The plug-in base has a first hole and a second hole.

[0018] Furthermore, the universal adapter has a steam conduit that is detachably connected to the front end of the first port, and the rear end of the first port is connected to and communicates with the internal pipeline.

[0019] The first electrical connection terminal assembly is inserted into the second hole from back to front, and the second electrical connection terminal assembly is detachably inserted into the second hole from front to back, and the first electrical connection terminal assembly and the second electrical connection terminal assembly are in contact in the second hole to achieve electrical connection.

[0020] Optionally, a contact switch is provided in the nozzle body, and the contact switch is electrically connected to the second electrical connection terminal assembly through the spray gun end wiring harness.

[0021] The nozzle body is equipped with a steam outlet switch, which is in contact with the contact switch.

[0022] Preferably, the universal adapter has an annular conductive seat, through which the steam conduit passes;

[0023] The front end of the second electrical connection terminal assembly is connected to the rear end of the annular conductive base, and the spray gun end wire harness extends into the universal adapter and is connected to the front end of the annular conductive base.

[0024] In a preferred embodiment of the present invention, a temperature control display is provided on the steam shell, and the temperature control display is connected in series between the temperature detection sensor and the electromagnetic switching valve.

[0025] The temperature control display has at least a high temperature indicator and a low temperature indicator, and the temperature control display includes a temperature adjustment knob, which is used to set the temperature critical value.

[0026] When the temperature detected by the temperature sensor is greater than the temperature threshold, the high temperature indicator light turns on and the low temperature indicator light turns off; when the temperature detected by the temperature sensor is less than or equal to the temperature threshold, the high temperature indicator light turns off and the low temperature indicator light turns on.

[0027] In a preferred embodiment of the present invention, a pressure detection sensor is further included, the pressure detection sensor including a detection end and a display end;

[0028] The steam boiler assembly has a pressure detection port on its top. The detection end of the pressure detection sensor is installed at the pressure detection port, and the display end of the pressure detection sensor is exposed outside the steam casing.

[0029] Furthermore, the temperature detection sensor includes a first temperature sensor and a second temperature sensor, with the first temperature sensor located in front of the second temperature sensor.

[0030] The steam boiler assembly includes a heating element, and the first temperature sensor, the heating element, and the second temperature sensor are connected in series in sequence.

[0031] A fuse is connected in series between the heating element and the second temperature sensor.

[0032] This invention also provides a safe method of use, applied to the steam cleaning equipment as described above, comprising the following steps:

[0033] S1. First, inject an aqueous solution into the steam boiler assembly through the water inlet port;

[0034] S2. Move the steam cleaning equipment to the area to be cleaned;

[0035] S3. Select the corresponding shape of the nozzle body according to the cleaning needs, and assemble the nozzle body with the universal adapter to form a complete cleaning head accessory;

[0036] S4. Assemble the cleaning head accessory onto the steam outlet port of the steam housing. When the first electrical connection terminal assembly and the second electrical connection terminal assembly are properly connected and a complete first detection circuit is formed;

[0037] S5. Connect the integrated power supply interface to an external power source via an external cable. The integrated power supply interface supplies power to the electromagnetic switch valve, steam detection sensor, and temperature detection sensor via an internal cable.

[0038] S6. If the first detection circuit is normally connected, the heating tube in the steam boiler assembly is powered on and starts to run. The heating tube heats the aqueous solution in the steam boiler assembly to form steam.

[0039] If the first detection circuit is not connected, the heating element in the steam boiler assembly is energized but does not work.

[0040] S7. When the user presses the steam outlet switch on the nozzle body, the steam outlet switch triggers the contact switch, and the contact switch outputs an opening signal to the solenoid switch valve through the spray gun end wiring harness and the first detection circuit.

[0041] S8. The steam detection sensor monitors the steam data at the steam detection port, and the second detection circuit outputs the steam data signal to the solenoid switch valve; at the same time, the temperature detection sensor monitors the temperature data at the bottom of the steam boiler assembly, and the third detection circuit outputs the temperature data signal to the solenoid switch valve.

[0042] If the steam data and temperature data meet the set values, the electromagnetic switch valve switches to the open state, and the steam in the steam boiler assembly is transported to the cleaning head accessory through the internal pipeline, and then sprayed out by the cleaning head accessory to the outside for cleaning.

[0043] If either the steam data or the temperature data fails to meet the set value, the solenoid valve remains closed, cutting off the flow path between the steam boiler components and the cleaning head accessory to prevent steam from being ejected.

[0044] S9. The pressure sensor monitors the pressure data at the pressure detection port. The user reads the pressure data through the display end of the pressure sensor to determine whether the steam boiler components are working properly.

[0045] Preferably, based on real-time temperature data, one of the high-temperature indicator light and the low-temperature indicator light is turned on and the other is turned off, allowing the user to judge the temperature data through the high-temperature indicator light and the low-temperature indicator light; furthermore, the user can adjust the set value of the steam data through the temperature control knob.

[0046] The beneficial effects of this invention are as follows:

[0047] I. Multi-detection circuit design: The first, second and third detection circuits realize the detection of cleaning head connection, steam quality and temperature respectively. Steam is only allowed to be output when all detection conditions are met, which greatly improves the safety of use.

[0048] II. Integrated Design: The integrated power supply interface provides unified power supply, simplifies the wiring layout, and improves equipment reliability.

[0049] 3. Modular cleaning head: The universal adapter can be used with various nozzle bodies to ensure reliable electrical connection and improve the applicability of the equipment.

[0050] IV. Multiple safety protections: Equipped with dual temperature sensors and fuses to prevent overheating damage to the equipment; pressure detection sensors monitor boiler pressure in real time to ensure that the equipment operates within a safe range.

[0051] V. Intelligent Control: Steam output is centrally controlled through electromagnetic switching valves, and visual operation and adjustment are achieved by combining temperature control display, thereby improving the user experience. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the front structure of the present invention.

[0053] Figure 2 This is a schematic diagram of the rear structure of the present invention.

[0054] Figure 3 This is a schematic diagram of the front internal structure.

[0055] Figure 4 This is a schematic diagram of the rear internal structure.

[0056] Figure 5 This is a cross-sectional view of the present invention.

[0057] Figure 6 yes Figure 5 An enlarged schematic diagram of part A in the middle.

[0058] Figure 7 This is a cross-sectional view of the nozzle body in this invention.

[0059] Figure 8 This is a schematic diagram of the cleaning head attachment in this invention.

[0060] Figure 9 This is a schematic diagram of the internal structure of the interface component in this invention.

[0061] Figure 10 This is a schematic diagram of the general-purpose adapter in this invention.

[0062] Figure 11 This is a schematic diagram of the inner bottom structure in this invention.

[0063] Figure 12 This is a partial structural diagram of the top part of the present invention.

[0064] Figure 13 This is a split diagram of the universal adapter in this invention.

[0065] In the diagram: 1. Steam housing; 11. Water inlet port; 12. Steam outlet port; 13. First electrical connection terminal assembly; 14. First wiring harness; 2. Steam boiler assembly; 21. Steam detection port; 22. Plug-in assembly; 221. Plug-in socket; 222. Flip cover; 223. First hole; 224. Second hole; 23. Pressure detection port; 24. Heating element; 3. Internal piping; 4. Cleaning head accessory; 41. Universal adapter; 411. Steam conduit; 412. Annular conductive base; 42. Nozzle body; 421. Contact switch; 422 1. Spray gun end wiring harness; 423. Steam outlet switch; 43. Second electrical connection terminal assembly; 51. Electromagnetic switch valve; 52. Steam detection sensor; 521. Second wiring harness; 53. Temperature detection sensor; 531. First temperature sensor; 532. Second temperature sensor; 533. Third wiring harness; 54. Integrated power supply interface; 541. External cable; 55. Fuse; 6. Temperature control display; 61. High temperature indicator light; 62. Low temperature indicator light; 63. Temperature adjustment knob; 7. Pressure detection sensor; 71. Detection end; 72. Display end. Detailed Implementation

[0066] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0067] Reference Figures 1 to 13A steam cleaning device includes: a steam housing 1 having a water inlet port 11 and a steam outlet port 12; a steam boiler assembly 2 disposed within the steam housing 1 for supplying steam, and the steam boiler assembly 2 being connected to the water inlet port 11 and the steam outlet port respectively via internal pipes 3; a cleaning head accessory 4 detachably connected to the steam outlet port 12; an electromagnetic switch valve 51 disposed at the steam outlet port; a first electrical connection terminal assembly 13 and a second electrical connection terminal assembly 43, the first electrical connection terminal assembly 13 being disposed in the steam outlet port 12, and the second electrical connection terminal assembly 43 being disposed in the cleaning head accessory 4, wherein the first electrical connection terminal assembly 13 is connected to the electromagnetic switch valve 51 via a first wiring harness 14, thereby forming a first detection circuit between the electromagnetic switch valve 51 and the cleaning head accessory 4; and a steam detection sensor 52. A steam detection port 21 is provided on the top of the boiler assembly 2. The steam detection sensor 52 is installed at the steam detection port 21. The steam detection sensor 52 is connected to the electromagnetic switch valve 51 through a second wiring harness 521, so that a second detection circuit is formed between the electromagnetic switch valve 51 and the steam detection sensor 52. A temperature detection sensor 53 is disposed at the bottom of the steam boiler assembly 2. The temperature detection sensor 53 is connected to the electromagnetic switch valve 51 through a third wiring harness 533, so that a third detection circuit is formed between the electromagnetic switch valve 51 and the temperature detection sensor 53. An integrated power supply interface 54 is provided on the steam housing 1. The integrated power supply interface 54 is electrically connected to the electromagnetic switch valve 51, the steam detection sensor 52, and the temperature detection sensor 53 through internal cables, and is electrically connected to an external power source through an external cable 541.

[0068] The above describes the basic structural scheme of this invention. Its detection and control logic is divided into: 1. First detection circuit: A circuit is formed between the first electrical connection terminal assembly 13 of the steam outlet port 12 and the second electrical connection terminal assembly 43 of the cleaning head accessory 4 to detect whether the accessory is correctly installed. If not connected or has poor contact, the electromagnetic switch valve 51 remains closed to prevent steam leakage. 2. Second detection circuit: The steam detection sensor 52 at the top of the steam boiler monitors steam parameters in real time. When insufficient steam pressure is detected (e.g., cold water not fully vaporized), the control system can delay opening the electromagnetic valve to ensure stable high-temperature steam output. 3. Third detection circuit: The bottom temperature detection sensor 53 monitors the boiler water level. When the water level is too low, causing the heating element to dry-burn, the temperature detection sensor 53 triggers a signal to close the electromagnetic valve and cut off the heating power supply to prevent equipment damage.

[0069] It is important to emphasize that when the device is first turned on, the solenoid valve will not open if the data from any of the first, second, or third detection circuits does not meet the requirements. This is to prevent the steam from carrying liquid water and thus avoid safety risks.

[0070] It is worth mentioning that, referring to Figure 2 , Figure 4 This invention employs a unified power supply architecture, where the integrated power supply interface 54 integrates the power supply requirements of the electromagnetic switching valve 51, sensors, and control circuits. Power is supplied uniformly via an external power source, reducing internal wiring complexity and improving system reliability. Preferably, a DC-DC converter module can be used to power the sensors. Combined with a sleep mode (e.g., shutting down unnecessary circuits when idle), standby power consumption can be reduced, meeting energy efficiency standards.

[0071] The advantages of this embodiment are: 1. Multi-dimensional safety protection system: Compared with traditional steam cleaning equipment (such as the Kärcher SG series, which relies only on single temperature protection), this design achieves more comprehensive safety control through a triple detection circuit: First, hardware interlocking, the solenoid valve cannot open when the accessory is not connected; second, process monitoring, real-time monitoring of steam pressure and water level; third, fault response, quickly cutting off the energy supply in case of abnormality to avoid safety accidents. 2. Modular design and compatibility: First, the cleaning head accessory 4 is detachable, supporting quick replacement of various functional modules (such as floor brushes and crevice nozzles) to meet the cleaning needs of different scenarios; second, it has a standardized interface, and the electrical connection terminal components adopt universal specifications, reducing accessory development costs, while being compatible with third-party accessories, enhancing the product's market competitiveness. 3. Energy efficiency advantage of integrated power supply: Unlike the energy loss caused by the decentralized power supply of traditional equipment, dynamic load adjustment dynamically adjusts the heating power according to steam demand, reducing energy waste.

[0072] In traditional designs, integrating a second electrical connection terminal into each nozzle leads to: redundant terminal assembly, increasing costs; and significant differences in terminal contact accuracy between different nozzles, easily causing "detection failures." To address these shortcomings, the proposed solution is as follows:

[0073] Reference Figure 1 The cleaning head accessory 4 includes a universal adapter 41 and several nozzle bodies 42 of different shapes. The nozzle bodies 42 are connected to the steam outlet port 12 through the universal adapter 41, and the second electrical connection terminal assembly 43 is disposed in the universal adapter 41.

[0074] The universal adapter 41 serves as a bridge between the cleaning head accessory 4 and the main unit (steam outlet port 12), undertaking both mechanical fixing and electrical conduction functions: 1. Mechanical connection: One end of the adapter is matched with the steam outlet port 12 to ensure no leakage during steam transmission; the other end is compatible with all different shaped nozzle bodies 42. 2. Electrical integration: The second electrical connection terminal assembly 43 is built into the end of the adapter near the steam outlet housing 1. When the adapter is connected to the steam outlet port 12, it can directly and precisely contact the first electrical connection terminal assembly 13 in the steam housing 1 to form a complete first detection circuit.

[0075] The nozzle body 42 has different shapes and performs different cleaning functions, such as a slender pointed nozzle structure, a wide flat plate structure, a porous atomizing structure, etc., without special limitation here.

[0076] Specifically, refer to Figures 6-10 The steam outlet port 12 is provided with a plug-in assembly 22, which includes a plug-in base 221 and a flip cover 222 rotatably connected to the plug-in base 221. The plug-in base 221 has a first hole 223 and a second hole 224. The universal adapter 41 has a steam conduit 411, which is detachably connected to the front end of the first hole 223. The rear end of the first hole 223 is connected to and in communication with the internal pipeline 3. The first electrical connection terminal assembly 13 is inserted into the second hole 224 from back to front, and the second electrical connection terminal assembly 43 is detachably inserted into the second hole 224 from front to back. The first electrical connection terminal assembly 13 and the second electrical connection terminal assembly 43 are in contact in the second hole 224 to achieve electrical connection. The specific technical features and advantages of the solution are as follows: 1. Physical isolation, improving safety and reliability: On the one hand, it achieves separation of steam and electricity, that is, the first hole 223 (steam) and the second hole 224 (electrical) are set independently, avoiding direct contact between high-temperature steam (100-150℃) and terminal components, while preventing steam condensate from seeping into the electrical channel and causing a short circuit; on the other hand, it achieves terminal protection: the flip cover 222 closes the hole when not in use, which can prevent dust, hair and other foreign objects from entering the second hole 224, avoiding contamination or oxidation of the terminal. 2. Precise guidance, reducing the operating threshold: On the one hand, it adopts a dual-guide design, the guide rib of the second hole 224 cooperates with the groove of the adapter terminal component to ensure precise alignment even when the terminal is blindly inserted; on the other hand, it achieves synchronous insertion, the steam pipe 411 and the terminal component have the same insertion stroke design, the user does not need to align the two interfaces separately, and can complete the dual connection with one push.

[0077] Based on the foregoing embodiments, the preferred embodiment regarding the appendix is ​​as follows: (Refer to...) Figure 7The nozzle body 42 is provided with a contact switch 421, which is electrically connected to the second electrical connection terminal assembly 43 through the spray gun end wiring harness 422; the nozzle body 42 is provided with a steam outlet switch 423, which is contactably connected to the contact switch 421.

[0078] First, in this embodiment, the contact switch 421 is connected in series to the original "first detection circuit" so that the overall control circuit forms a multi-level interlock. Only when the cleaning head accessory 4 is correctly connected and the user operates the steam outlet switch 423 (the contact switch 421 is triggered to conduct) will the first detection circuit be fully activated and the electromagnetic switch valve 51 may be opened. If any condition is not met, the circuit will be disconnected and steam will not be output.

[0079] The workflow of this embodiment is as follows: 1. Initial state: The user does not operate the steam outlet switch 423. The steam outlet switch 423 and the contact switch 421 are in a separated state. The contact switch 421 remains open. The first detection circuit is not connected. The electromagnetic switch valve 51 is closed, and there is no steam output. 2. User operation: The user holds the nozzle body 42 and pulls the steam outlet switch 423 (such as a trigger). The mechanical arm of the steam outlet switch 423 rotates with the trigger, gradually approaching and pressing the spring of the contact switch 421, causing the contacts of the contact switch 421 to close. 3. Circuit connection: After the contact switch 421 is closed, the first detection circuit (including the electromagnetic switch valve 51, terminal assembly, and contact switch 421) forms a complete circuit, and the electromagnetic switch valve 51 receives the connection signal. Steam output: After confirming that both the "second detection circuit" and the "third detection circuit" meet the conditions, the electromagnetic switch valve 51 opens the valve, and steam sequentially passes through the internal pipeline 3 → the first orifice 223 → the steam conduit 411 → the nozzle body 42 → and is ejected. 5. Stop output: When the user releases the steam outlet switch 423, the trigger rebounds under the action of the return spring, the steam outlet switch 423 separates from the contact switch 421, the contact switch 421 spring is reset and disconnected, the first detection circuit is interrupted, the electromagnetic switch valve 51 is immediately closed, and the steam output stops.

[0080] The core advantages of this embodiment are: 1. Operational safety: From passive protection to active control, steam output is linked to user operation via the steam outlet switch 423. Steam will only be output when the steam outlet switch 423 is continuously pressed / operated, and will stop immediately upon release. This avoids the risk of burns caused by unintentional triggering, making it especially suitable for families with children. 2. Energy efficiency: Output is on demand, reducing waste. During cleaning (such as moving the nozzle to align with gaps in the stains), the user can pause steam output by releasing the steam outlet switch 423, preventing steam from being released during non-cleaning stages and reducing the energy consumption of repeated heating by the boiler. 3. Hierarchical control: In conjunction with equipment status detection, it forms a three-level verification with the original detection circuit (Level 1: Is the cleaning head correctly connected? Level 2: Is the equipment in a safe state? Level 3: Is the user actively operating the system?). Steam is only output when all three conditions are met, and any failure at any level immediately cuts off the power, forming a more robust safety interlock than traditional designs.

[0081] Preferably, refer to Figure 6 , Figure 13 The universal adapter 41 has an annular conductive base 412, through which the steam conduit 411 passes. The front end of the second electrical connection terminal assembly 43 is connected to the rear end of the annular conductive base 412, and the spray gun end wiring harness 422 extends into the universal adapter 41 and is connected to the front end of the annular conductive base 412. The annular conductive base 412 enables coaxial integration and physical isolation between the steam transmission channel and the electrical connection channel, while simplifying the electrical wiring inside the adapter and improving the reliability and assembly efficiency of the modular connection.

[0082] Reference Figure 3 , Figure 12In a preferred embodiment, a temperature control display 6 is provided on the steam housing 1. The temperature control display 6 is connected in series between the temperature detection sensor 53 and the solenoid valve 51. The temperature control display 6 has at least a high-temperature indicator light 61 and a low-temperature indicator light 62, and includes a temperature adjustment knob 63 for setting a temperature threshold. Its operation is as follows: when the temperature detected by the temperature detection sensor 53 is greater than the temperature threshold, the high-temperature indicator light 61 is turned on and the low-temperature indicator light 62 is turned off; when the temperature detected by the temperature detection sensor 53 is less than or equal to the temperature threshold, the high-temperature indicator light 61 is turned off and the low-temperature indicator light 62 is turned on. This design of the temperature control display 6 integrates three major functions: temperature status visualization, user-initiated temperature adjustment, and safety interlock control. This not only improves the user experience of the equipment but also strengthens the temperature control logic of the third detection circuit by connecting it in series between the temperature detection sensor 53 and the solenoid valve 51. Users can manually set the temperature threshold using the temperature adjustment knob 63 according to actual needs and equipment conditions to meet usage requirements.

[0083] Optionally, refer to Figure 3 The system also includes a pressure sensor 7, which comprises a detection end 71 and a display end 72. A pressure detection port 23 is provided on the top of the steam boiler assembly 2. The detection end 71 of the pressure sensor 7 is installed at the pressure detection port 23, and the display end 72 of the pressure sensor 7 protrudes outside the steam casing 1. By adding an independent pressure sensor 7, the pressure status monitoring and visualization of the steam boiler assembly 2 are enhanced based on the original steam detection sensor 52. Users can promptly detect problems through observation, thereby improving operational safety.

[0084] Furthermore, referring to Figure 11 The temperature detection sensor 53 includes a first temperature sensor 531 and a second temperature sensor 532, with the first temperature sensor 531 located in front of the second temperature sensor 532. The steam boiler assembly 2 includes a heating tube 24, and the first temperature sensor 531, heating tube 24, and second temperature sensor 532 are connected in series in sequence. A fuse 55 is also connected in series between the heating tube 24 and the second temperature sensor 532. This solution constructs a three-level overheat protection system (dual electronic monitoring and single-stage physical fuse), significantly improving the safety redundancy of the equipment under extreme conditions such as dry burning and abnormal heating.

[0085] Example 2

[0086] Reference Figures 1 to 13 A safe method of use, applied to the steam cleaning equipment as described above, includes the following steps:

[0087] S1. First, inject an aqueous solution into the steam boiler assembly 2 through the water inlet port 11. Preferably, injecting an aqueous solution into the steam boiler assembly 2 is a prerequisite for all operations, directly matching the anti-dry-burning function of the second temperature sensor 532 and the fuse 55. If heating is performed directly without adding water, the second temperature sensor 532 will quickly detect that the heating tube 24 is overheating and trigger the heating circuit to be cut off.

[0088] S2. Move the steam cleaning equipment to the area to be cleaned; position the equipment before cleaning to avoid risks such as cable pulling or cleaning head collision caused by moving it after powering on.

[0089] S3. Select the corresponding nozzle body 42 according to the cleaning needs, and assemble the nozzle body 42 with the universal adapter 41 to form a complete cleaning head accessory 4; different cleaning scenarios correspond to different nozzles, ensuring cleaning efficiency while avoiding improper steam pressure caused by nozzle mismatch.

[0090] S4. Assemble the cleaning head accessory 4 onto the steam outlet port 12 of the steam housing 1. When the first electrical connection terminal assembly 13 and the second electrical connection terminal assembly 43 are properly connected and form a complete first detection circuit, the equipment will determine that the steam output path is safe only when the terminals are in precise contact, laying the foundation for the subsequent start-up of the heating tube 24.

[0091] S5. Connect the integrated power supply interface 54 to an external power source via an external cable 541. The integrated power supply interface 54 supplies power to the electromagnetic switch valve 51, steam detection sensor 52, and temperature detection sensor 53 via an internal cable. Ensure that the core components such as the electromagnetic switch valve 51 and the sensor are powered on synchronously to avoid detection failure caused by power shortage in some circuits.

[0092] S6. If the first detection circuit is normally connected, the heating tube 24 in the steam boiler assembly 2 is energized and starts to operate. The heating tube 24 heats the aqueous solution in the steam boiler assembly 2 to form steam. If the first detection circuit is not connected, the heating tube 24 in the steam boiler assembly 2 is energized but does not work. This fundamentally avoids the risk of burns caused by "steam spraying directly from the steam outlet when there is no cleaning head".

[0093] S7. When the user presses the steam outlet switch 423 on the nozzle body 42, the steam outlet switch 423 triggers the contact switch 421. The contact switch 421 outputs an opening signal to the solenoid switch valve 51 through the spray gun end wiring harness 422 and the first detection circuit. This reflects the safety design of user active control. Even if the equipment status meets the standard, steam will not be automatically discharged without user operation.

[0094] S8. Steam detection sensor 52 monitors steam data at steam detection port 21, and the second detection circuit outputs steam data signal to solenoid valve 51. At the same time, temperature detection sensor 53 monitors temperature data at the bottom of steam boiler assembly 2, and the third detection circuit outputs temperature data signal to solenoid valve 51. The final opening permission of solenoid valve 51 must meet two conditions, corresponding to the second and third detection circuits.

[0095] If the steam data and temperature data meet the set values ​​respectively, the electromagnetic switch valve 51 switches to the open state, and the steam in the steam boiler assembly 2 is transported to the cleaning head accessory 4 through the internal pipeline 3, and then sprayed out to the outside by the cleaning head accessory 4 for cleaning work.

[0096] If either the steam data or the temperature data fails to meet the set value, the electromagnetic switch valve 51 remains closed, cutting off the flow path between the steam boiler assembly 2 and the cleaning head accessory 4 to prevent steam from being ejected.

[0097] The electromagnetic switch valve 51 will only open if both conditions are met; if either condition is not met, it will remain closed, forming a dual parameter lock to prevent insufficient steam from causing ineffective cleaning or excessive temperature from causing equipment failure.

[0098] S9. The detection end 71 of the pressure detection sensor 7 monitors the pressure data at the pressure detection port 23. The user reads the pressure data through the display end 72 of the pressure detection sensor 7 to determine whether the steam boiler assembly 2 is working normally. If the pressure data is found to be abnormal, the user can immediately stop the machine for inspection.

[0099] S10. After cleaning, first loosen the steam outlet switch 423, then disconnect the external power supply; after the equipment cools to room temperature, drain the residual aqueous solution in the boiler through the drain outlet, clean the cleaning head accessory 4, and let it dry and store.

[0100] Preferably, based on real-time temperature data, one of the high-temperature indicator light 61 and the low-temperature indicator light 62 is turned on while the other is turned off, allowing the user to judge the temperature data through the high-temperature indicator light 61 and the low-temperature indicator light 62. Furthermore, the user can adjust the set value of the steam data using the temperature control knob 63. For example, rotating the temperature control knob 63 clockwise increases the set threshold value (e.g., from 100℃ to 150℃); rotating it counterclockwise decreases the value (e.g., from 150℃ to 80℃).

[0101] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the invention shall still fall within the protection scope of the present invention.

Claims

1. A steam cleaning device, comprising: A steam housing (1) having a water inlet port (11) and a steam outlet port (12); A steam boiler assembly (2) is installed inside a steam shell (1), and the steam boiler assembly (2) is connected to the water inlet (11) and the steam outlet through internal pipes (3); Cleaning head accessory (4), which is detachably connected to the steam outlet port (12); Its features are: An electromagnetic switching valve (51) is configured at the steam outlet; A first electrical connection terminal assembly (13) and a second electrical connection terminal assembly (43), wherein the first electrical connection terminal assembly (13) is disposed in the steam outlet port (12) and the second electrical connection terminal assembly (43) is disposed in the cleaning head accessory (4), and the first electrical connection terminal assembly (13) is connected to the electromagnetic switch valve (51) via a first wiring harness (14) so ​​that a first detection circuit is formed between the electromagnetic switch valve (51) and the cleaning head accessory (4); Steam detection sensor (52), the top of the steam boiler assembly (2) is provided with a steam detection port (21), the steam detection sensor (52) is installed at the steam detection port (21), the steam detection sensor (52) is connected to the electromagnetic switch valve (51) through the second wire harness (521) so that a second detection circuit is formed between the electromagnetic switch valve (51) and the steam detection sensor (52); A temperature detection sensor (53) is disposed at the bottom of the steam boiler assembly (2). The temperature detection sensor (53) is connected to the electromagnetic switch valve (51) via a third wiring harness (533) so that a third detection circuit is formed between the electromagnetic switch valve (51) and the temperature detection sensor (53). An integrated power supply interface (54) is installed on the steam housing (1). The integrated power supply interface (54) is electrically connected to the electromagnetic switch valve (51), the steam detection sensor (52), and the temperature detection sensor (53) through internal cables. The integrated power supply interface (54) is also electrically connected to an external power source through an external cable (541).

2. The steam cleaning equipment according to claim 1, characterized in that: The cleaning head accessory (4) includes a universal adapter (41) and several nozzle bodies (42) of different shapes. The nozzle bodies (42) are connected to the steam outlet port (12) through the universal adapter (41), and the second electrical connection terminal assembly (43) is disposed in the universal adapter (41).

3. The steam cleaning equipment according to claim 2, characterized in that: A plug-in assembly (22) is provided at the steam outlet port (12). The plug-in assembly (22) includes a plug-in base (221) and a flip cover (222) rotatably connected to the plug-in base (221). The plug-in base (221) has a first hole (223) and a second hole (224). The universal adapter (41) has a steam conduit (411) which is detachably connected to the front end of the first port (223), and the rear end of the first port (223) is connected to and communicates with the internal pipeline (3). The first electrical connection terminal assembly (13) is inserted into the second hole (224) from back to front, and the second electrical connection terminal assembly (43) is detachably inserted into the second hole (224) from front to back. The first electrical connection terminal assembly (13) and the second electrical connection terminal assembly (43) are in contact in the second hole (224) to achieve electrical connection.

4. The steam cleaning equipment according to claim 3, characterized in that: The nozzle body (42) is provided with a contact switch (421), and the contact switch (421) is electrically connected to the second electrical connection terminal assembly (43) through the spray gun end wiring harness (422); The nozzle body (42) is provided with a steam outlet switch (423), which is in contact with the contact switch (421).

5. The steam cleaning equipment according to claim 4, characterized in that: The universal adapter (41) has an annular conductive seat (412) inside, and the steam conduit (411) passes through the annular conductive seat (412); The front end of the second electrical connection terminal assembly (43) is connected to the rear end of the annular conductive base (412), and the spray gun end wire harness (422) extends into the universal adapter (41) and is connected to the front end of the annular conductive base (412).

6. The steam cleaning equipment according to claim 5, characterized in that: A temperature control display (6) is provided on the steam housing (1), and the temperature control display (6) is connected in series between the temperature detection sensor (53) and the electromagnetic switch valve (51); The temperature control display (6) has at least a high temperature indicator (61) and a low temperature indicator (62), and the temperature control display (6) includes a temperature adjustment knob (63), which is used to set the temperature threshold value. When the temperature detected by the temperature sensor (53) is greater than the temperature threshold, the high temperature indicator (61) turns on and the low temperature indicator (62) turns off; when the temperature detected by the temperature sensor (53) is less than or equal to the temperature threshold, the high temperature indicator (61) turns off and the low temperature indicator (62) turns on.

7. The steam cleaning equipment according to claim 6, characterized in that: It also includes a pressure detection sensor (7), which includes a detection end (71) and a display end (72); The steam boiler assembly (2) is provided with a pressure detection port (23) on the top. The detection end (71) of the pressure detection sensor (7) is installed at the pressure detection port (23), and the display end (72) of the pressure detection sensor (7) is exposed outside the steam shell (1).

8. The steam cleaning equipment according to claim 7, characterized in that: The temperature detection sensor (53) includes a first temperature sensor (531) and a second temperature sensor (532), wherein the first temperature sensor (531) is located in front of the second temperature sensor (532); The steam boiler assembly (2) has a heating tube (24), and the first temperature sensor (531), the heating tube (24), and the second temperature sensor (532) are connected in series in sequence. A fuse (55) is connected in series between the heating tube (24) and the second temperature sensor (532).

9. A safe method of use, applied to the steam cleaning equipment as described in claim 8, characterized in that, Includes the following steps: S1. First, inject an aqueous solution into the steam boiler assembly (2) through the water inlet port (11); S2. Move the steam cleaning equipment to the area to be cleaned; S3. Select the corresponding shape of the nozzle body (42) according to the cleaning needs, and assemble the nozzle body (42) with the universal adapter (41) to form a complete cleaning head accessory (4); S4. Assemble the cleaning head accessory (4) onto the steam outlet port (12) of the steam housing (1). When the first electrical connection terminal assembly (13) and the second electrical connection terminal assembly (43) are in place and a complete first detection circuit is formed; S5. Connect the integrated power supply interface (54) to an external power source via an external cable (541). The integrated power supply interface (54) supplies electrical energy to the electromagnetic switch valve (51), steam detection sensor (52), and temperature detection sensor (53) via an internal cable. S6. If the first detection circuit is normally connected, the heating tube (24) in the steam boiler assembly (2) is powered on and starts to run. The heating tube (24) heats the aqueous solution in the steam boiler assembly (2) to form steam. If the first detection circuit is not connected, the heating tube (24) in the steam boiler assembly (2) is energized but does not work; S7. The user presses the steam outlet switch (423) on the nozzle body (42). The steam outlet switch (423) triggers the contact switch (421). The contact switch (421) outputs an opening signal to the electromagnetic switch valve (51) through the spray gun end wiring harness (422) and the first detection circuit. S8. The steam detection sensor (52) monitors the steam data at the steam detection port (21), and the second detection circuit outputs the steam data signal to the electromagnetic switch valve (51); at the same time, the temperature detection sensor (53) monitors the temperature data at the bottom of the steam boiler assembly (2), and the third detection circuit outputs the temperature data signal to the electromagnetic switch valve (51). If the steam data and temperature data meet the set values ​​respectively, the electromagnetic switch valve (51) switches to the open state, and the steam in the steam boiler assembly (2) is transported to the cleaning head accessory (4) through the internal pipeline (3), and sprayed out to the outside by the cleaning head accessory (4) for cleaning work; If either the steam data or the temperature data fails to meet the set value, the electromagnetic switch valve (51) remains closed, cutting off the flow path between the steam boiler assembly (2) and the cleaning head accessory (4) to prevent steam from being ejected. S9. The detection end (71) of the pressure detection sensor (7) monitors the pressure data at the pressure detection port (23). The user reads the pressure data through the display end (72) of the pressure detection sensor (7) to determine whether the steam boiler assembly (2) is working normally.

10. The safe use method according to claim 9, characterized in that: Based on real-time temperature data, one of the high-temperature indicator (61) and the low-temperature indicator (62) is turned on and the other is turned off, allowing the user to judge the temperature data through the high-temperature indicator (61) and the low-temperature indicator (62); and the user can adjust the set value of the steam data through the temperature control knob (63).

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