Steam generator

Abstract

The utility model discloses a steam generator. The steam generator comprises a main shell, a base fixedly arranged at the bottom of the main shell in a covering mode, an evaporation dish installed in the main shell, an opening formed in the main shell and opposite to the evaporation dish in position, and an evaporation cover arranged at the opening and used for guiding out steam generated in the evaporation dish. The evaporation dish is arranged in the main shell, the convex nozzle is fixed on the main shell and stretches into the bottom of the inner side of the evaporation dish, the separable water storage tank is arranged on the main shell, the water supplementing assembly is arranged between the water storage tank and the evaporation dish and used for guiding water in the water storage tank into the evaporation dish, and the control system takes a control circuit board as a core. Compared with the traditional technology only equipped with an evaporating dish, the steam generator provided by the utility model has the advantages that the function is more intelligent and safer, the application scene is widened, and the steam generator is not limited to a single application scene any more.

Description

Technical Field

[0001] This utility model relates to the field of steam equipment, and more specifically, to a steam generator. Background Technology

[0002] Steam is needed in many situations in daily life, such as air humidification, sauna, winter heating, and cooking.

[0003] Firstly, in air humidification applications, the most popular method currently is ultrasonic atomization humidification. This involves using an ultrasonic transducer to apply high-frequency vibrations to water, causing the water to detach from the water layer in the form of molecules or clusters and enter the air as a mist, thereby increasing air humidity. However, this technology has several drawbacks: ① Compared to air, water is more prone to bacterial growth and even cultivation, especially stagnant water that has been left in a container for several days, or water in a container that has not been cleaned for a long time. Therefore, when using ultrasonic atomization for humidification, any bacteria or viruses that may be present in the water will adhere to the water molecules / clusters and be released into the air, threatening human health; ② In dry and cold seasons, ultrasonic atomization humidification increases the feeling of damp coldness in the air, resulting in a poor user experience. In other words, ultrasonic atomization humidification is not suitable for use in dry and cold environments.

[0004] For the reasons mentioned above, the market has spurred the development of steam humidification technology, which involves heating water to evaporate it and increase the humidity of the air. However, there are several drawbacks: ① Existing technology uses direct heating of water in a single container, resulting in a long start-up cycle (all the water in the container needs to be heated to boiling before it can start working, which takes a long time); ② Due to the deep water layer in the container, it inevitably produces high-decibel noise during boiling; ③ Traditional steam humidification devices are similar to electric hot pots, with poor heat retention and a risk of burns.

[0005] Secondly, sauna applications typically use electric or fuel-based heating. A boiler heats the water, and once boiling, the steam generated is transported to the sauna room through a steam channel, raising the temperature and humidifying the room to create a high-temperature, high-humidity environment. The drawback of this technology is that supplying the sauna to the required conditions necessitates a continuous and sufficient amount of steam—meaning a boiler of sufficient capacity is needed to heat enough water. Therefore, in the initial heating phase, enough water needs to be heated to boiling point in the pipes, a process that generally takes a long time. This means a longer wait before enjoying the sauna, resulting in a less pleasant experience. Furthermore, maintaining steam output requires significantly more energy. This is particularly problematic in small home saunas where the duration is unpredictable (home saunas are relatively flexible and may be interrupted at any time). If the sauna session is short, a large amount of boiled water remains unused, leading to waste.

[0006] Third, in winter heating applications, piped heating and fireplaces offer the best user experience, followed by air conditioners and electric heaters. Therefore, in situations where piped heating and fireplaces are unavailable, homemade steam heating technology has excellent market prospects. However, winter heating applications using homemade steam typically employ a combination of professional boilers and radiators, which is expensive and requires professional installation.

[0007] Fourth, in steaming and heating applications, current technologies all use kitchen cookware.

[0008] Based on the problems existing in the above-mentioned background technology, there is an urgent need for a multi-purpose steam generator that can quickly provide steam. Utility Model Content

[0009] This invention addresses the aforementioned deficiencies in the prior art by providing a steam generator.

[0010] The technical solution adopted by this utility model to solve its technical problem is:

[0011] This specification provides one or more embodiments of a steam generator, which includes a main housing, a base fixedly mounted on the bottom of the main housing, an evaporating dish installed inside the main housing, an opening on the main housing opposite to the evaporating dish, an evaporating cover provided at the opening for exporting steam generated in the evaporating dish, a protruding nozzle fixed to the main housing and extending into the bottom of the inner side of the evaporating dish, a detachable water tank provided on the main housing, a water replenishment component provided between the water tank and the evaporating dish for introducing water from the water tank into the evaporating dish, and a control system with a control circuit board as its core.

[0012] The evaporating dish is sealed and connected to the main shell;

[0013] The main housing and the evaporation cap are sealed together.

[0014] The protruding nozzle extends into the bottom of the evaporating dish and has a water supply channel inside. The lower end opens at the water supply channel at the bottom of the protruding nozzle and is equipped with a water level detector to detect the water level in the evaporating dish.

[0015] The evaporation cap is equipped with a steam nozzle for steam output;

[0016] The water replenishment component is detachable, with one part fixed to the bottom of the water storage tank and sealed when the water storage tank is detached from the main shell; the other part is fixed to the upper part of the main shell; when the water storage tank is placed on the main shell, the water replenishment component is connected, allowing the water storage tank to communicate with the main shell.

[0017] When the water level in the evaporating dish is lower than the low water level, the water replenishment component introduces water from the water storage tank into the evaporating dish; when the water level in the evaporating dish is higher than the high water level, it stops introducing water from the water storage tank into the evaporating dish.

[0018] The control system is equipped with at least two levels of dry-burn protection devices, wherein: the first level dry-burn protection device is a temperature switch fixed to the outside of the bottom of the evaporating dish; the second level dry-burn protection device is the water level detector in the evaporating dish, and the control circuit board performs dry-burn protection action according to the water level in the evaporating dish.

[0019] In one or more embodiments of this specification, the top edge of the evaporating dish is provided with an outwardly extending annular flange, and the steam generator further includes a bracket sleeved around the evaporating dish for supporting the annular flange, the bracket being provided with a fixing hole for fixed connection with the main housing.

[0020] In one or more embodiments of this specification, a first sealing ring is provided between the bracket and the bottom wall of the annular flange. The steam generator further includes a fixing frame detachably connected to the bracket and used to clamp the annular flange. A second sealing ring is provided between the fixing frame and the main housing. The first and second sealing rings, in conjunction with the above structure, complete the sealed connection between the evaporating dish and the main housing, constraining the steam generated by the steam generator to be output entirely through the steam nozzle, preventing it from entering the main housing and causing internal damage and steam leakage.

[0021] In one or more embodiments of this specification, the portion of the water replenishment assembly fixed to the bottom of the water tank includes a drain spout, a valve seal covering the drain spout, a valve core movably disposed within the drain spout, and a spring disposed within the drain spout for pushing the valve core to seal against the valve seal; the valve seal has a central outlet hole through which water can flow; when the valve core is pressed against the valve seal, the valve core blocks the outlet hole; when the valve core is away from the valve seal, the outlet hole communicates with the drain spout;

[0022] Correspondingly, the portion of the water replenishment assembly fixed to the main housing has a water inlet at a position corresponding to the drain nozzle at the bottom of the water tank, and the water inlet has a connecting nozzle; when the water tank is placed on the main housing, the connecting nozzle is inserted into the water outlet hole in the center of the valve seal at the bottom of the water tank, pushing the valve core away from the valve seal, so that the water replenishment assembly is through, and the lower edge of the valve seal abuts against the upper edge of the water inlet, so that the two form a cylindrical seal.

[0023] The structure of this water replenishment assembly allows the water tank to be removed from or reinstalled from the main housing at any time to replenish water or for other purposes. Upon removal, the internal spring resets, pushing the valve core to seal the outlet hole in the center of the valve seal, restoring the water tank's seal and preventing leakage. Upon reinstallation, the connecting nozzle pushes the valve core to compress the spring, connecting the nozzle to the water tank.

[0024] In one or more embodiments of this specification, a filter cover is provided on the inner bottom of the water storage tank, located around the drain nozzle.

[0025] The filter cover prevents solid particles that may be present in the water from entering the water supply component, thus avoiding leakage caused by seal failure.

[0026] In one or more embodiments of this specification, the control system further includes a third-level dry-burn protection device. The third-level dry-burn protection device is implemented by an upper water level detector in conjunction with the control circuit board electrically connected thereto. The upper water level detector is installed at the docking nozzle and is used to detect the water level in the docking nozzle. When the upper water level detector detects a lack of water at the docking nozzle, the control circuit board recognizes that the water storage tank has detached from the main housing or that the water in the water storage tank has been used up. The control circuit board then controls the steam generator to stop working to prevent the evaporating dish from dry-burning.

[0027] This design adds an extra dry-burn protection device to the steam generator, providing an additional layer of safety protection.

[0028] In one or more embodiments of this specification, a water pump is further provided inside the protruding nozzle. The water pump has an inlet and an outlet. Its inlet is connected to the connecting nozzle through a pipeline, and its outlet is connected to the water inlet inside the protruding nozzle.

[0029] This design is an electric constant water level scheme. The water level inside the evaporating dish is detected by a lower water level detection device. When the water level is insufficient, the control system starts the water pump to replenish water in the evaporating dish until the state of the lower water level detection device changes. This stabilizes the water level inside the evaporating dish within a certain range, which can basically stabilize the water temperature inside the evaporating dish and keep the steam output basically stable.

[0030] In one or more embodiments of this specification, the evaporation cap includes a cap body that can be covered at the opening, a hollow handle fixed to the cap body, an automatic pressure relief valve fixed to the hollow handle, and a protruding buckle on the edge of the cap body that protrudes from the side wall of the cap body.

[0031] The hollow handle is a bridge type and is fixed to the cover by two connecting blocks. One of the connecting blocks is hollow and is connected to the steam nozzle of the evaporating dish covered under the cover.

[0032] The automatic pressure relief valve is connected to the steam nozzle;

[0033] Correspondingly, on the side wall of the opening of the main housing, there is a groove for the buckle to rotate and engage, and on the side wall of the opening, there is a notch for the steam nozzle to be inserted and accommodated.

[0034] In one or more embodiments of this specification, the connecting nozzle on the main housing is directly connected to the bottom of the protruding nozzle through a pipeline; correspondingly, the water tank cover is provided with a sealing plate and a fastener, so that the water tank cover can be positioned and fastened to the water tank, and the two are sealed together.

[0035] This design is a mechanical constant water level control scheme, which can achieve a basically constant water level inside the evaporating dish and a basically stable output steam at a lower cost.

[0036] In one or more embodiments of this specification, the steam generator further includes optional steam application accessories that are directly or via pipeline connected to the steam nozzle, thereby making the steam generator multifunctional. The steam application accessories include sauna accessories, cooking accessories, heating accessories, humidifying accessories, and aromatherapy accessories.

[0037] This design provides a multi-functional solution for steam generators, allowing them to be used in sauna, steaming, heating, humidification, aromatherapy and other applications by connecting to different steam application accessories.

[0038] The above-described at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0039] 1) The water tank is separated from the evaporating dish, which can limit the water level inside the evaporating dish and keep it at a low level. When the machine is turned on, the small amount of water in the evaporating dish can be boiled in a very short time to provide steam as soon as possible.

[0040] 2) The constant water level control technology can keep the water level in the evaporating dish basically constant throughout the entire working process, so as not to cause boiling to stop due to large fluctuations in the water level, thus ensuring that the output steam is basically stable.

[0041] 3) The water storage tank is separate from the evaporation dish. Sufficient water can be stored in the water storage tank, and water can be added multiple times during operation by removing the water storage tank, so that this steam generator can use an unlimited amount of water and provide steam indefinitely.

[0042] 4) Multiple dry-burn protection features provide this steam generator with superior safety assurance.

[0043] 5) By selecting different steam application accessories, the application scenarios of the steam generator can be broadened, no longer limited to a single application scenario, and can be widely used in various application scenarios such as sauna, air humidification, heating, and steaming. Attached Figure Description

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0045] Figure 1 This is an exploded structural diagram of the steam generator of this utility model;

[0046] Figure 2 This is an exploded structural diagram of the water storage tank in the steam generator of this utility model;

[0047] Figure 3 This is an exploded structural diagram of the interior of the main shell in the steam generator of this utility model;

[0048] Figure 4 This is an exploded structural diagram of the evaporation cover in the steam generator of this utility model;

[0049] Figure 5 This is a schematic diagram of another embodiment of the water replenishment component in the steam generator of this utility model. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0051] like Figure 1-5 As shown, in the first embodiment of the steam generator of this utility model, the steam generator 10 includes a main housing 11, a base 12 fixedly covered at the bottom of the main housing 11, an evaporating dish 13 installed inside the main housing 11, an opening 14 on the main housing 11 opposite to the evaporating dish 13, an evaporating cover 15 provided at the opening 14 for sealing the evaporating dish 13 and venting the steam generated therein, a water tank 16 provided on the main housing 11, and a steam generator 10 provided between the water tank 16 and the evaporating dish 13 for... The water supply component, which introduces water from the water storage tank 16 into the evaporating dish 13, consists of a water replenishment component, a fixing frame 21 fixed inside the main housing 11 to support the evaporating dish 13, a protruding nozzle 31 fixed to the fixing frame 21 and inserted into the bottom inner side of the evaporating dish 13, and a necessary control system. When the water level in the evaporating dish 13 is lower than the first water level line, the water supply component introduces water from the water storage tank 16 into the evaporating dish 13. When the water level in the evaporating dish 13 is higher than the second water level line, the water supply component stops introducing water from the water storage tank 16 into the evaporating dish 13.

[0052] like Figure 3As shown, in this embodiment, the evaporation cover 15 includes a cover body that can be placed on the opening 14, a first vent 40 fixed on the cover body and communicating with the evaporation dish 13, a steam nozzle 41 disposed on the cover plate and communicating with the first vent 40, and a hollow handle 42 disposed on the cover plate. The first vent 40 or the steam nozzle 41 is provided with an automatic pressure relief valve 43.

[0053] Steam enters from the first vent 40 and then exits from the steam nozzle 41. When the steam pressure inside the evaporating dish 13 is too high, the automatic pressure relief valve 43 can automatically release the steam, thus achieving automatic pressure relief.

[0054] In this embodiment, the evaporating dish 13 is electrically heated. Preferably, an electric heating element, such as an electric heating tube or a ceramic heater, is provided inside or at the bottom of the evaporating dish 13. A temperature switch connected in series with the electric heating element is fixed to the bottom outer side of the evaporating dish 13. This switch disconnects the power supply circuit of the electric heating element when the temperature at the bottom of the evaporating dish 13 exceeds the set temperature of the temperature switch (above the boiling point of water), thus preventing the evaporating dish 13 from dry burning and serving as the first layer of protection against water shortage.

[0055] In this embodiment, the lower end of the protruding nozzle 31 is open, and the interior is provided with a channel that communicates with the lower opening to supply water to the evaporating dish 13. A water level detector 32 is also provided. Since the protruding nozzle 31 is inserted into the inner bottom of the evaporating dish 13, the water level detector 32 is used to detect the water level in the evaporating dish 13. When the water level in the evaporating dish 13 is insufficient, the control system stops supplying power to the electric heating element to prevent the evaporating dish 13 from burning dry, which serves as a second layer of protection against water shortage.

[0056] In this embodiment, a hollow boss 35 protruding from the main housing 11 is provided on the main housing 11. An operation display panel 38 electrically connected to the control circuit board 37 is installed on the top surface of the boss 35. An isolation cover 36 is fixedly installed inside the boss 35. The control circuit board 37 is installed inside the isolation cover 36. The operation display panel 38 is electrically connected to the control circuit board 37. Together with the electric heating element, temperature switch, water level detector 32 and other components electrically connected to the control circuit board 37, they constitute a control system.

[0057] Specifically, the operation display panel 38 is equipped with a power on / off switch, a power adjustment button, and a timer setting button. Correspondingly, the control circuit board 37 is equipped with a heating power adjustment circuit. Furthermore, the operation display panel 38 also features a wireless communication on / off switch, and the control circuit board 37 is equipped with a wireless communication circuit, which includes, but is not limited to, WiFi or Bluetooth. The operation display panel 38 also has a display screen to show the setting and operating status of the steam generator. This design enables the steam generator to operate unattended and remotely, increasing its level of intelligence and solving the drawback of requiring on-site operation in many applications (such as sauna applications, where, for safety reasons, the steam generator is generally placed outside the sauna space), resulting in a superior user experience.

[0058] In one implementation, the water replenishment assembly includes a water pump 34 electrically connected to a control circuit board 37 for pumping water from a water tank 16 into an evaporating dish 13. The control circuit board 37 controls the operation of the water pump 34 based on the output state from a lower water level detector 32. As water in the evaporating dish 13 evaporates and the water level gradually decreases from high to low, reaching a level that causes a change in the output state of the lower water level detector 32 (e.g., from high to low) (i.e., the first water level line), the control circuit board 37 drives the water pump 34 to pump water from the water tank 16 into the evaporating dish 13, replenishing the water level. When the water level rises above a level that causes another change in the output state of the lower water level detector 32 (e.g., from low to high) (i.e., the second water level line), the control circuit board 37 stops the water pump 34, ceasing the replenishment of water to the evaporating dish 13. This achieves controllable water level control within the evaporating dish 13 and maintains it at a substantially constant level. The advantages of this design are: ① It can control the water level in the evaporating dish 13 to be relatively low, that is, with less water in the evaporating dish 13, it can provide steam to the outside in a very short time after the machine is turned on; ② It can maintain a constant water level during operation (with a small amount of water added each time), so that the water temperature in the evaporating dish 13 will not drop significantly due to the addition of new water, thus "extinguishing" the boiling. In other words, it can maintain a relatively stable supply of steam to the outside, which solves the design defect of traditional technology that only has an evaporating dish 13.

[0059] like Figure 4 As shown, in order to reduce the contact between the evaporating dish 13 and the main housing 11, the top edge of the evaporating dish 13 is provided with an outwardly extending annular flange 17. The steam generator 10 also includes a bracket 18 sleeved around the evaporating dish 13 to support the annular flange 17. The bracket 18 is provided with a fixing hole 19 for fixed connection with the main housing 11.

[0060] When fixing the evaporating dish 13, the bracket 18 can be placed over the evaporating dish 13, and then the bracket 18 can be moved up to abut against the annular flange 17. Finally, the bracket 18 is fixedly connected to the top wall of the main shell 11, so that the evaporating dish 13 is suspended and fixed inside the main shell 11, reducing the contact between the evaporating dish 13 and the main shell 11, preventing the main shell 11 from overheating and causing burns or reducing the user experience. On the other hand, the gap between the evaporating dish 13 and the main shell 11 can be used to block the solid path for the evaporating dish 13 to conduct heat outward, improve the heat utilization rate of the evaporating dish 13, and make the water in the evaporating dish 13 more efficiently heated and evaporated.

[0061] Furthermore, a first sealing ring 20 is provided between the bracket 18 and the bottom wall of the annular flange 17. The steam generator 10 also includes a fixing frame 21 that is detachably connected to the bracket 18 and used to clamp the annular flange 17. A second sealing ring 22 is provided between the fixing frame 21 and the main housing 11.

[0062] By setting the first sealing ring 20 and the second sealing ring 22, the evaporating dish 13 can be sealed and fixed to the main housing 11. By setting the fixing bracket 21, the evaporating dish 13 can be clamped and fixed more securely. This design effectively seals the evaporating dish 13 to the main housing 11, preventing steam from entering the main housing 11 and avoiding damage to the inside of the steam generator and steam leakage.

[0063] Preferably, the evaporating dish 13 is also provided with an anti-boiling plate, which is a porous flat plate structure and is horizontally installed on the fixing frame 21 at the height corresponding to the second water level line in the evaporating dish 13. It is used to suppress the noise generated when the water in the evaporating dish 13 boils and improve the user experience.

[0064] like Figure 2 As shown, in one embodiment of this utility model, the bottom of the water tank 16 is provided with a drain spout 23, a valve seal 24 covering the drain spout 23, a valve core 25 movably disposed within the drain spout 23, and a spring 26 disposed within the drain spout 23 for pushing the valve core 25 to seal against the valve seal 24. A filter cover 27 is provided inside the water tank 16 around the drain spout 23. The valve seal 24 has a water outlet hole 28 in the middle for water to flow through. When the valve core 25 is pressed against the valve seal 24, the valve core 25 blocks the water outlet hole 28. When the valve core 25 is away from the valve seal 24, the water outlet hole 28 communicates with the drain spout 23.

[0065] Correspondingly, the main housing 11 is provided with an inlet 29 at a position corresponding to the outlet, and the inlet 29 is provided with a mating nozzle 30 that can be inserted into the valve seal 24 to push the valve core 25 away from the valve seal 24.

[0066] When the water tank 16 is removed from the main housing 11, the spring 26, under its own elastic restoring force, pushes the valve core 25 against the valve seal 24, causing the valve core 25 to block the water outlet 28 and form a seal, preventing water in the water tank 16 from flowing out through the drain spout 23. When the water tank 16 is installed on the main housing 11, the water inlet spout 29 on the main housing 11 is inserted into the valve seal 24 and pushes the valve core 25 upward, compressing the spring 26. The valve core 25 moves away from the valve seal 24, and the water outlet 28 connects with the drain spout 23, allowing water in the water tank 16 to flow through the drain spout 23, the water outlet 28, and into the connecting spout 30.

[0067] This design allows the water tank 16 to be freely separated from the main housing 11 without leakage after separation, and allows for the addition of water by removing the water tank 16 or cleaning the inside of the water tank 16 to ensure hygiene.

[0068] The split structure of the water tank 16, besides keeping the water level in the evaporating dish 13 at a low level to ensure rapid steam supply after startup, also provides sufficient reserve water. Furthermore, it allows the water tank 16 to be removed and refilled during operation, meeting the need for long-term steam supply. Compared to traditional technologies that only include the evaporating dish 13, this embodiment allows for replenishment of the water tank 16 during operation, providing unlimited water and steam supply, resulting in a superior user experience.

[0069] Furthermore, as an option, such as Figure 3 As shown, a water level detector 33 is also installed in the water supply channel within the nozzle 31. The water level detector 33 is a non-contact liquid level sensor, which is installed in the water supply channel together with a float with a built-in magnetic ring. The water level detector 33 is insulated and installed in the inner ring where the float is located. The float floats with the water level in the water inlet. When the water level in the water inlet is sufficient, the float rises, and the water level detector 33 outputs a "sufficient water level" signal to the control circuit board 37, which is electrically connected to it. When the water level in the water inlet is insufficient, the float sinks, the output state of the water level detector 33 is reversed, and the control circuit board 37 recognizes it as "insufficient water level".

[0070] The effective sensing height of the upper water level detector 33 is higher than the monitoring height of the lower water level detector 32. It is used to detect the water level in the water supply channel inside the nozzle 31, and indirectly detect the water level in the water storage tank 16, or detect whether the water storage tank 16 has been removed. When the upper water level detector 33 detects "insufficient water level", the water volume in the water supply channel inside the nozzle 31 is already very low and insufficient to support the continued operation of this steam generator. The control circuit board 37 can cut off the power supply to the electric heating element at the bottom of the evaporating dish 13 to stop evaporation, as a third layer of protection to prevent the evaporating dish 13 from burning dry. At the same time, as needed, a water shortage prompt or abnormal alarm can be displayed on the operation display panel 38.

[0071] In one or more embodiments of this utility model, the three-layer dry-burn protection function operates in the following sequence: Under normal circumstances, the third-layer protection function (if provided) operates first to provide dry-burn protection; if in some embodiments the third-layer protection function is not provided, or the third-layer protection function is abnormal or fails, the second-layer protection function is triggered when the water level in the water supply channel inside the nozzle 31 continues to drop to a certain level; if both the third-layer protection and the second-layer protection are abnormal or fail, when the water in the evaporating dish 13 is completely evaporated, the temperature at the bottom of the evaporating dish 13, under the heating of the electric heating element, will exceed the boiling temperature of water and reach the operating temperature of the temperature switch fixed at the bottom of the evaporating dish 13. At this point, the internal contacts of the temperature switch connected in series with the electric heating element will open, cutting off the power supply to the electric heating element and stopping it from heating the evaporating dish 13, that is, the first-layer dry-burn protection is activated. The beneficial effects of implementing this embodiment are: ① It provides more layers of dry-burn protection for the steam generator, making it safer, especially in long-term operation and remote control applications, this function is more necessary; ② It can provide timely prompts and alarms through the operation display panel 38, so that users can add water in time or deal with possible abnormalities in time.

[0072] To facilitate the installation and removal of the evaporation cover 15, the edge of the cover 39 is provided with a protruding buckle 44 protruding from the side wall of the cover 39, the side wall of the opening 14 is provided with a buckle groove 45 that allows the protruding buckle 44 to be rotated and inserted, and the side wall of the opening 14 is also provided with a notch 46 that allows the steam nozzle 41 to be inserted and accommodated.

[0073] When installing the evaporator cover 15, align the steam nozzle 41 with the notch 46, and insert the protrusion 44 into the groove 45 and tighten it to achieve a fixed installation of the evaporator cover 15.

[0074] In this embodiment, the base 12 is also provided with a ventilation grille 49 to provide a necessary heat dissipation channel for the area below the evaporating dish 13, preventing the temperature below the evaporating dish 13 from being too high, causing deformation of the shell 11 and the base 12, or affecting the lifespan of the main shell 11 and the base 12, and also preventing excessively high temperatures from passing through the isolation cover 36, causing the temperature of the control circuit board 37 inside to be too high, resulting in damage to the components.

[0075] In another embodiment, the steam generator is also equipped with various steam application accessories, which consist of interconnected mist guiding channels and mist outlets. The first end of the mist guiding channel is connected to the steam nozzle on the evaporation cover 15, and the last end is connected to the mist outlet. The mist outlet has different structures depending on the different applications, wherein:

[0076] The steam application accessories for saunas have a flexible hose as the mist guide channel and a box-shaped structure with multiple holes on the lower side as the mist outlet. This guides the steam to be output from the multiple holes on the lower side, preventing the steam from shooting upwards in a large jet and causing burns.

[0077] The steam application accessory for humidification has a mist guiding channel made of rigid material that directs the mist upwards; its mist outlet can be horizontally rotated and installed above the mist guiding channel, and sends any condensate back to the evaporating dish 13 through the mist guiding channel to prevent condensate dripping.

[0078] Steam application accessories for steaming and heating have a steam outlet that is bowl-shaped with an open top. The container containing the items to be steamed is placed on the bowl-shaped opening of the steam outlet, and the items to be steamed are heated by steam. The container holding the items to be steamed also serves as an insulator.

[0079] The steam application accessories for heating have a mist guiding channel connected to a radiator (such as a heating radiator, a mattress with a built-in coil, etc.), which is a double-pipe sealed type, and a drive device for driving steam circulation is provided in the mist guiding channel.

[0080] Aromatherapy steam application accessories are provided with a container for placing aromatherapy fragrances on the mist outlet of a sauna and / or humidifier steam application accessory, so that the aromatherapy fragrances are dispersed into the air with the steam flow.

[0081] like Figure 5 As shown, in another embodiment of this utility model, the portion of the water replenishment assembly fixed to the bottom of the water storage tank 16 has the same structure as in the above embodiment, and the portion fixed to the main housing 11 from the inlet nozzle 29 to the connecting nozzle 30 also has the same structure as in the above embodiment. The difference is that in this embodiment, the connecting nozzle 30 is directly connected to the water supply channel inside the protruding nozzle 31 via a pipeline (no need for a water pump connection). Correspondingly, the water storage tank 16 is covered with a sealing cap 48 to seal the water storage tank 16, and the water storage tank 16 is sealed by the sealing cap 48; moreover, the lower water level detector in the above embodiment is not required.

[0082] Figure 5This is only a schematic diagram; the specific structure does not need to be drawn. The drain pipe 47 inside the convex nozzle opens at the lower end of the nozzle and inserts into the evaporating dish 13. When the water level in the evaporating dish 13 is lower than the lower end of the drain pipe 47, the lower end of the drain pipe 47 is exposed to the air above the water surface in the evaporating dish 13. Water in the water storage tank 16 flows downwards along the water replenishment component and drain pipe 47 under gravity, entering the evaporating dish 13 to replenish water and raise the water level. Simultaneously, because the upper end of the water storage tank 16 is sealed, a negative pressure is formed above the water surface in the water storage tank 16, preventing the water from continuing to flow downwards. Since the air density is lower than that of water, the air above the water surface in the evaporating dish 13 enters the water storage tank 16 through the same channel, balancing the pressure in the water storage tank 16. When the water level is higher than the lower end of the drain pipe 47, the air passage into the water storage tank 16 is blocked, the pressure in the water storage tank 16 is balanced, and water no longer flows into the evaporating dish 13. This process is repeated until the water level in the evaporating dish 13 reaches a basically constant state, resulting in the same control outcome as in the above embodiment.

[0083] The advantages of implementing this embodiment are: ① It replaces the electric constant water level control method in the above embodiment with a mechanical constant water level control method, which has high reliability; ② It eliminates the need for devices such as water pumps and water level detectors, which simplifies the structure, reduces costs, and makes control simpler.

[0084] Furthermore, in this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," "connected," and "penetrating" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0085] In this invention, the terms "water level" and "water level line" referring to water surface height are not necessarily limit markers placed at a specific location on a container, channel, or pipe. They should be interpreted broadly. For example, a water level detector may be installed at a location on a container, channel, or pipe. When the water level inside the container, channel, or pipe is higher than a certain level, the output state of the water level detector will flip; conversely, when the water level inside the container, channel, or pipe is lower than a certain level, the output state of the water level detector will flip again. The two water surface heights that trigger the flipping of the water level detector's output state constitute the actual existing "water level" or "water level line" that plays a real role in operation.

[0086] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A steam generator, characterized in that, The steam generator includes a main housing, a base fixedly mounted on the bottom of the main housing, an evaporating dish installed inside the main housing, an opening on the main housing opposite to the evaporating dish, an evaporating cover located at the opening for exporting steam generated in the evaporating dish, a protruding nozzle fixed to the main housing and extending into the bottom of the inner side of the evaporating dish, a detachable water tank located on the main housing, a water replenishment component located between the water tank and the evaporating dish for importing water from the water tank into the evaporating dish, and a control system with a control circuit board as its core. The evaporating dish is sealed and connected to the main shell; The main housing and the evaporation cap are sealed together. The protruding nozzle extends into the bottom of the evaporating dish and has a water supply channel inside. The lower end opens at the water supply channel at the bottom of the protruding nozzle and is equipped with a water level detector to detect the water level in the evaporating dish. The evaporation cap is equipped with a steam nozzle for steam output; The water replenishment component is detachable, with one part fixed to the bottom of the water storage tank and sealed when the water storage tank is detached from the main shell; the other part is fixed to the upper part of the main shell; when the water storage tank is placed on the main shell, the water replenishment component is connected, allowing the water storage tank to communicate with the main shell. When the water level in the evaporating dish is lower than the low water level, the water replenishment component introduces water from the water storage tank into the evaporating dish; when the water level in the evaporating dish is higher than the high water level, it stops introducing water from the water storage tank into the evaporating dish. The control system is equipped with at least two levels of dry-burn protection devices, wherein: the first level dry-burn protection device is a temperature switch fixed to the outside of the bottom of the evaporating dish; the second level dry-burn protection device is the water level detector in the evaporating dish, and the control circuit board performs dry-burn protection action according to the water level in the evaporating dish.

2. The steam generator according to claim 1, characterized in that, The top edge of the evaporating dish is provided with an outwardly extending annular flange. The steam generator also includes a bracket sleeved around the evaporating dish to support the annular flange. The bracket is provided with a fixing hole for fixed connection with the main housing.

3. The steam generator according to claim 2, characterized in that, A first sealing ring is provided between the bracket and the bottom wall of the annular flange. The steam generator also includes a fixing frame that is detachably connected to the bracket and used to clamp the annular flange. A second sealing ring is provided between the fixing frame and the main housing.

4. The steam generator according to claim 1, characterized in that, The portion of the water replenishment assembly fixed to the bottom of the water tank includes a drain nozzle, a valve seal covering the drain nozzle, a valve core movably disposed within the drain nozzle, and a spring disposed within the drain nozzle for pushing the valve core to seal against the valve seal. The valve seal has a central outlet hole through which water can flow. When the valve core is pressed against the valve seal, the valve core blocks the outlet hole. When the valve core is away from the valve seal, the outlet hole communicates with the drain nozzle. Correspondingly, the portion of the water replenishment assembly fixed to the main housing has a water inlet at a position corresponding to the drain nozzle at the bottom of the water tank, and the water inlet has a connecting nozzle; when the water tank is placed on the main housing, the connecting nozzle is inserted into the water outlet hole in the center of the valve seal at the bottom of the water tank, pushing the valve core away from the valve seal, so that the water replenishment assembly is through, and the lower edge of the valve seal abuts against the upper edge of the water inlet, so that the two form a cylindrical seal.

5. The steam generator according to claim 4, characterized in that, The bottom inner side of the water tank, located around the drain nozzle, is covered with a filter cover.

6. The steam generator according to claim 4, characterized in that, The control system is also equipped with a third-level dry-burn protection device. The third-level dry-burn protection device is implemented by an upper water level detector in conjunction with the control circuit board electrically connected to it. The upper water level detector is installed at the docking nozzle and is used to detect the water level in the docking nozzle. When the upper water level detector detects that there is no water at the docking nozzle, the control circuit board recognizes that the water storage tank has detached from the main shell or that the water in the water storage tank has been used up. The control circuit board then controls the steam generator to stop working to prevent the evaporating dish from dry-burning.

7. The steam generator according to claim 4, characterized in that, The protruding nozzle is also equipped with a water pump, which has an inlet and an outlet. The inlet is connected to the connecting nozzle through a pipe, and the outlet is connected to the water inlet inside the protruding nozzle.

8. The steam generator according to any one of claims 1-7, characterized in that, The evaporation cap includes a cap body that can be placed on the opening, a hollow handle fixed to the cap body, an automatic pressure relief valve fixed to the hollow handle, and a protruding buckle on the edge of the cap body that protrudes from the side wall of the cap body. The hollow handle is a bridge type and is fixed to the cover by two connecting blocks. One of the connecting blocks is hollow and is connected to the steam nozzle of the evaporating dish covered under the cover. The automatic pressure relief valve is connected to the steam nozzle; Correspondingly, on the side wall of the opening of the main housing, there is a groove for the buckle to rotate and engage, and on the side wall of the opening, there is a notch for the steam nozzle to be inserted and accommodated.

9. The steam generator according to claim 4, characterized in that, The connecting nozzle on the main housing is directly connected to the bottom of the protruding nozzle through a pipeline; correspondingly, the water tank cover is provided with a sealing plate and a fastener, so that the water tank cover can be positioned and fastened to the water tank, and the two are sealed.

10. The steam generator according to claim 1, characterized in that, The steam generator also includes optional steam application accessories that are directly or via pipeline connected to the steam nozzle, making the steam generator multifunctional. The steam application accessories include sauna accessories, steaming accessories, heating accessories, humidifying accessories, and aromatherapy accessories.

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