Steam generator

Abstract

The invention 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 a traditional technology only equipped with an evaporating dish, the steam generator is more intelligent and safer in function, the application scene is widened, and the steam generator is not limited to a single application scene any more.

Description

Technical Field

[0001] The present invention relates to the field of steam equipment, and more particularly to a steam generator. Background Art

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

[0003] First, in the application of air humidification, the most popular one is ultrasonic atomization humidification, that is, the ultrasonic transducer applies high-frequency vibration to the water, so that the water in the form of molecules or molecular clusters, separates from the water layer, and enters the air in the form of water mist, thereby increasing the humidity of the air. The defects of this technology are: ① Compared with air, water is more likely to breed or even cultivate bacteria, especially non-flowing water that has been placed 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 technology for humidification, bacteria or viruses that may exist in the water will be attached to water molecules / clusters as the water is atomized, and will be released into the air together, threatening human health; ② In dry and cold seasons, ultrasonic atomization humidification technology increases the dampness and coldness of the air, and the experience is poor, that is, ultrasonic atomization humidification technology is not suitable for use in dry and cold environments.

[0004] Based on the above reasons, the market has given birth to steam humidification technology, that is, heating water to evaporate it to increase the humidity of the air, but: ① The existing technology uses a method of directly heating water in a single container, which has a long startup cycle (all the water in the container needs to be heated to boiling when starting work, which takes a long time); ② Due to the deep water layer in the container, it is inevitable to emit high-decibel noise during boiling; ③ Traditional steam humidification devices are similar to electric hot pots, with poor insulation effect and a risk of scalding.

[0005] Second, in sauna applications, electric heating or fuel heating is usually used, and a boiler device is used to heat the water therein. After the water boils, the water vapor generated by boiling is transported to the sauna room through the steam guide channel, so that the sauna room is heated and humidified to form a high temperature and high humidity environment. The defect of this technology is that since it is necessary to supply the sauna room with continuous and sufficient water vapor to achieve sauna conditions, that is, a boiler with sufficient capacity is required to heat enough water, so in the initial stage of starting heating, it is necessary to heat enough water to boil the pipeline. This process generally takes a long time, that is, before enjoying the sauna service, it is necessary to wait for a long time, the experience is poor, and at the same time, it is necessary to consume more energy to maintain the steam output. Especially in the application of small home saunas, when the sauna time is uncertain (home saunas are relatively casual and may be interrupted at any time), if the sauna time is short, a large amount of boiled water in the boiler is not used up, resulting in waste.

[0006] Third, in winter heating applications, pipe heating and fireplaces are preferred for the best experience, and the heating experience provided by the heating function of air conditioners and electric heaters is second. Therefore, in the absence of pipe heating and fireplaces, the use of homemade steam heating technology has excellent market prospects. In winter heating applications using homemade steam heating, professional boiler + radiator technology is often used, which is expensive and requires professional installation.

[0007] Fourth, in the application of steaming and heating, the current technology uses kitchen pots.

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

[0009] The present invention aims at solving the above-mentioned defects in the prior art and provides a steam generator.

[0010] The technical solution adopted by the present invention to solve its technical problem is:

[0011] One or more embodiments of the present specification construct a steam generator, comprising a main shell, a base fixedly mounted on the bottom of the main shell, an evaporation dish installed in the main shell, an opening disposed on the main shell opposite to the evaporation dish, an evaporation cover disposed at the opening for guiding the steam generated in the evaporation dish, a protrusion fixed on the main shell and inserted into the bottom of the inner side of the evaporation dish, a detachable water storage tank disposed on the main shell, a water replenishment component disposed between the water storage tank and the evaporation dish for guiding the water in the water storage tank into the evaporation dish, and a control system with a control circuit board as the core;

[0012] The evaporating dish is sealed and butted against the main shell, and an electric heating element is fixed on the outer side of the bottom;

[0013] The main shell and the evaporation cover are sealed and connected;

[0014] The protruding spout is inserted into the inner bottom of the evaporating dish, and a water supply channel is provided inside. The lower end opens at the water supply channel at the bottom of the protruding spout, and a lower water level detector is provided to detect the water level in the evaporating dish;

[0015] The evaporation cover is provided with a steam nozzle for steam output;

[0016] The water replenishment assembly is detachable, with one part fixed to the bottom of the water storage tank, and in a sealed state when the water storage tank is separated 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 assembly is connected, so that the water storage tank and the main shell are connected;

[0017] The water replenishment component introduces the water in the water storage tank into the evaporation dish when the water level in the evaporation dish is lower than the low water level, and stops introducing the water in the water storage tank into the evaporation dish when the water level in the evaporation dish is higher than the high water level;

[0018] The main housing is provided with a hollow boss protruding from the main housing, an operation display panel electrically connected to the control circuit board is installed on the top surface of the boss, an isolation cover is fixedly installed inside the boss, and the control circuit board is installed in the isolation cover;

[0019] The control system is provided with at least two levels of dry-burning protection devices, wherein: the first level of dry-burning protection device is a temperature switch fixed to the outer side of the bottom of the evaporating dish; the second level of dry-burning protection device detects the water level in the evaporating dish by the lower water level detector, and the control circuit board performs dry-burning protection action according to the water level in the evaporating dish.

[0020] In one or more embodiments of the present specification, the top edge of the evaporating dish is provided with an outwardly extending annular flange, and the steam generator further comprises a bracket disposed on the periphery of the evaporating dish for supporting the annular flange, and the bracket is provided with a fixing hole fixedly connected to the main shell.

[0021] In one or more embodiments of the present specification, a first sealing ring is provided between the bracket and the bottom wall of the annular flange, the steam generator further comprises a fixing frame detachably connected to the bracket and used to clamp the annular flange, and a second sealing ring is provided between the fixing frame and the main shell. The first sealing ring and the second sealing ring cooperate with the above structure to complete the sealed docking between the evaporating dish and the main shell, constrain the steam generated by the steam generator to be output along the steam nozzle, and prevent it from entering the main shell, causing internal damage and steam leakage.

[0022] In one or more embodiments of the present specification, the part of the water replenishment assembly fixed to the bottom of the water storage tank includes a water nozzle, a valve seal covering the water nozzle, a valve core movably arranged in the water nozzle, and a spring arranged in the water nozzle for pushing the valve core to seal against the valve seal; a water outlet hole for water flow to pass through is provided in the center of the valve seal; when the valve core is pressed against the valve seal, the valve core blocks the water outlet hole; when the valve core is away from the valve seal, the water outlet hole is communicated with the water nozzle;

[0023] Correspondingly, the part of the water replenishment assembly fixed on the main shell is provided with a water inlet nozzle at a position corresponding to the lower water nozzle at the bottom of the water tank, and the water inlet nozzle is provided with a docking nozzle; when the water tank is placed on the main shell, the docking 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 to allow the water replenishment assembly to pass through, and the lower edge of the valve seal is tightly pressed against the upper edge of the water inlet nozzle to form a cylindrical seal between the two.

[0024] The structure of the water replenishment assembly allows the water tank to be removed or reinstalled from the main housing at any time to replenish the water therein or for other purposes. At the moment of removal, the internal spring resets, pushing the valve core to block the water outlet hole in the center of the valve seal, so that the water tank is sealed again and does not leak; and when reinstalling, the docking nozzle pushes the valve core to compress the spring, so that the docking nozzle is connected to the water tank.

[0025] In one or more embodiments of the present specification, the inner bottom of the water storage tank, located outside the drain nozzle, is covered with a filter cover.

[0026] The filter cover prevents solid particles that may be present in the water from entering the water replenishment component, thereby avoiding water leakage caused by sealing failure.

[0027] In one or more embodiments of the present specification, the control system is further provided with a third-level dry-burning protection device, and the third-level dry-burning protection device is implemented by an upper water level detector in cooperation with the control circuit board electrically connected thereto, and the upper water level detector is installed at the docking nozzle 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 identifies that the water storage tank is detached from the main shell body, or the water in the water storage tank is exhausted, and the control circuit board controls the steam generator to stop working to prevent the evaporating dish from drying out.

[0028] This design adds a dry-burning protection device to the steam generator, adding a layer of safety protection.

[0029] In one or more embodiments of the present specification, a water pump is further provided in the protruding nozzle, and the water pump is provided with an inlet and an outlet, wherein the inlet is connected to the docking nozzle through a pipeline, and the outlet is connected to the water replenishment port in the protruding nozzle.

[0030] This design is an electric constant water level display scheme. The lower water level detection device detects the water level inside the evaporating dish. 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. In this way, the water level inside the evaporating dish is stabilized within a certain range, which can basically stabilize the water temperature inside the evaporating dish and keep the steam output basically stable.

[0031] In one or more embodiments of the present specification, the evaporation cover includes a cover body that can be covered at the opening, a hollow handle fixed on the cover body, an automatic pressure relief valve fixed on the hollow handle, and a convex buckle provided on the edge of the cover body and protruding from the side wall of the cover body;

[0032] The hollow handle is a bridge type, and is fixed on the cover body through two connecting piers, one of which is hollow, and connects the evaporating dish covered under the cover body with the steam nozzle;

[0033] The automatic pressure relief valve is in communication with the steam nozzle;

[0034] Correspondingly, a buckle groove for the convex buckle to be rotated and inserted is provided on the side wall of the opening of the main shell, and a notch for the steam nozzle to be embedded and accommodated is also provided on the side wall of the opening.

[0035] In one or more embodiments of the present specification, the docking nozzle on the main shell is directly connected to the bottom of the protruding nozzle through a pipeline; correspondingly, the water tank upper cover is provided with a sealing sheet and a buckle, so that the water tank upper cover can be positioned and buckled onto the water tank, and the two are sealed.

[0036] This design is a mechanical constant water level control solution, which can achieve a basically constant water level inside the evaporating dish and basically stable output steam at a lower cost.

[0037] In one or more embodiments of the present specification, the steam generator also includes optional steam application accessories that are connected to the steam nozzle directly or through a pipeline, making the steam generator multifunctional. The steam application accessories include sauna accessories, cooking accessories, heating accessories, humidification accessories, and aromatherapy accessories.

[0038] The design provides a multifunctional solution for the steam generator, which can be used in sauna, cooking, heating, humidification, aromatherapy and other applications by connecting different steam application accessories.

[0039] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0040] 1) The water storage tank is separated from the evaporating dish, which can limit the water level inside the evaporating dish and keep the water level at a low level. When the machine is turned on, the water with less storage in the evaporating dish can be boiled in a very short time to provide steam as soon as possible;

[0041] 2) Constant water level control technology can keep the water level in the evaporating dish basically constant during the entire working process, so as not to cause boiling to stop due to large fluctuations in the water level, thereby ensuring that the output steam is basically stable;

[0042] 3) The water storage tank is separated from the evaporating dish, and sufficient water can be stored in the water storage tank. It also supports multiple water additions by taking out the water storage tank during operation, so that the steam generator can use unlimited water and provide steam indefinitely;

[0043] 4) Multiple dry-burning protections provide better safety protection for this steam generator;

[0044] 5) By selecting different steam application accessories, the application scenarios of the steam generator are broadened and are no longer limited to a single application scenario. It can be widely used in sauna, air humidification, heating, steaming and heating and other application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0046] Figure 1 It is a schematic diagram of the exploded structure of the steam generator of the present invention;

[0047] Figure 2 It is a schematic diagram of the exploded structure of the water storage tank in the steam generator of the present invention;

[0048] Figure 3 It is a schematic diagram of the exploded structure inside the main shell of the steam generator of the present invention;

[0049] Figure 4 It is a schematic diagram of the exploded structure of the evaporation cover in the steam generator of the present invention;

[0050] Figure 5 It is a structural schematic diagram of another embodiment of the water replenishment component in the steam generator of the present invention. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0052] like Figure 1-5As shown, in the first embodiment of the steam generator of the present invention, the steam generator 10 includes a main shell 11, a base 12 fixedly covered at the bottom of the main shell 11, an evaporation dish 13 installed in the main shell 11, an opening 14 arranged on the main shell 11 opposite to the evaporation dish 13, an evaporation cover 15 arranged at the opening 14 for sealing the evaporation dish 13 and guiding the steam generated therein, a water storage tank 16 arranged on the main shell 11, and a water storage tank 16 arranged between the water storage tank 16 and the evaporation dish 13 for guiding the steam generated therein. The water replenishing component for introducing the water in the water storage tank 16 into the evaporating dish 13, the fixing frame 21 fixed in the main shell 11 for supporting the evaporating dish 13, the protruding nozzle 31 fixed on the fixing frame 21 and inserted into the inner bottom of the evaporating dish 13, and the necessary control system; the water replenishing component introduces the water in the water storage tank 16 into the evaporating dish 13 when the water level in the evaporating dish 13 is lower than a first water level line, and stops introducing the water in the water storage tank 16 into the evaporating dish 13 when the water level in the evaporating dish 13 is higher than a second water level line.

[0053] like Figure 3 As shown, in this embodiment, the evaporation cover 15 includes a cover body that can be covered at the opening 14, a first air outlet 40 fixedly mounted on the cover body and connected to the evaporation dish 13, a steam nozzle 41 disposed on the cover plate and connected to the first air outlet 40, and a hollow handle 42 disposed on the cover plate. An automatic pressure relief valve 43 is provided on the first air outlet 40 or the steam nozzle 41.

[0054] The steam enters from the first gas outlet 40 and then is discharged from the steam nozzle 41. When the steam pressure in the evaporating dish 13 is too high, the automatic pressure relief valve 43 can automatically release the steam to form automatic pressure relief.

[0055] 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 closely to the bottom of the outer side of the evaporating dish 13, and is used to disconnect 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 (higher than the boiling temperature of water), so as to prevent the evaporating dish 13 from drying out, which serves as the first layer of protection for water shortage protection.

[0056] In this embodiment, the lower end of the protruding spout 31 is open, and a channel communicating with the lower end opening for supplying water to the evaporating dish 13 is provided inside, and a lower water level detector 32 is provided. Since the protruding spout 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 it is detected that the water level in the evaporating dish 13 is insufficient, the control system stops supplying power to the electric heating element, thereby preventing the evaporating dish 13 from drying out, which serves as a second layer of protection for water shortage protection.

[0057] In this embodiment, a hollow boss 35 protruding from the main shell 11 is provided on the main shell 11, and 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, and a control circuit board 37 is installed in the isolation cover 36. The operation display panel 38 is electrically connected to the control circuit board 37, and together with the electric heating element, temperature switch, lower water level detector 32, etc. electrically connected to the control circuit board 37, constitute a control system.

[0058] Specifically, the operation display panel 38 is provided with a power switch, a power adjustment key, and a timing setting key, and correspondingly, the control circuit board 37 is provided with a heating power adjustment circuit. Further, the operation display panel 38 is also provided with a wireless communication switch, and correspondingly, the control circuit board 37 is also provided with a wireless communication circuit, and the wireless communication includes but is not limited to one of WiFi and Bluetooth circuits. The operation display panel 38 is also provided with a display screen to display the setting state and working state of the steam generator. This makes the steam generator have the functions of unattended and remote control, and the degree of intelligence is higher, which solves the disadvantage of having to be operated on site in many applications (such as sauna applications, for safety reasons, the steam generator is generally placed outside the sauna space), and the application experience is better.

[0059] In one implementation, the water replenishment component includes a water pump 34 electrically connected to the control circuit board 37 and used to pump water in the water storage tank 16 into the evaporation dish 13. The control circuit board 37 controls the operation of the water pump 34 according to the output state from the lower water level detector 32. When the water in the evaporation dish 13 is consumed as it evaporates, the water level gradually decreases from high to low (i.e., the first water level line), the control circuit board 37 drives the water pump 34 to work, pumping water in the water storage tank 16 into the evaporation dish 13 to replenish water for the evaporation dish 13; when the water level is higher than the level (i.e., the second water level line) at which the output state of the lower water level detector 32 jumps again (e.g., from a low level to a high level), the control circuit board 37 stops the water pump 34 from working and stops replenishing water for the evaporation dish 13. In this way, the water level in the evaporation dish 13 is controllable and maintained at a substantially constant water level. The advantages of this design are: 1. the water level in the evaporating dish 13 can be controlled to be relatively low, that is, the water in the evaporating dish 13 is less, and steam can be provided to the outside in a very short time after the machine is turned on; 2. a constant water level is maintained during operation (a small amount of water is added each time), so that the water temperature in the evaporating dish 13 does not drop significantly due to the addition of new water, and the boiling is not "extinguished", that is, the steam can be provided to the outside relatively stably, which solves the design defect of only the evaporating dish 13 in the traditional technology.

[0060] like Figure 4As shown, in order to reduce the contact between the evaporating dish 13 and the main shell 11, the top edge of the evaporating dish 13 is provided with an outwardly extending annular flange 17, and the steam generator 10 also includes a bracket 18 arranged on the periphery of the evaporating dish 13 for supporting the annular flange 17, and the bracket 18 is provided with a fixing hole 19 fixedly connected to the main shell 11.

[0061] When fixing the evaporating dish 13, the bracket 18 can be sleeved on the outside of the evaporating dish 13, and then the bracket 18 can be moved up to abut against the annular flange 17, and finally the bracket 18 can be fixedly connected to the top wall of the main shell 11, so that the evaporating dish 13 is suspended and fixed in 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 scalding 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 cut off the solid path for the evaporating dish 13 to conduct heat outward, thereby improving the heat utilization rate of the evaporating dish 13 and allowing the water in the evaporating dish 13 to be heated and evaporated more efficiently.

[0062] Furthermore, a first sealing ring 20 is provided between the bracket 18 and the bottom wall of the annular flange 17 , and the steam generator 10 also includes a fixing frame 21 detachably connected to the bracket 18 and used to clamp the annular flange 17 , and a second sealing ring 22 is provided between the fixing frame 21 and the main shell 11 .

[0063] By providing the first sealing ring 20 and the second sealing ring 22, the sealed evaporating dish 13 can be sealed and fixed on the main shell 11. By providing the fixing frame 21, the evaporating dish 13 can be clamped and fixed more firmly. This design effectively seals the evaporating dish 13 and the main shell 11, prevents steam from entering the main shell 11, and avoids internal damage and steam leakage of the steam generator.

[0064] Preferably, a stop-boiling plate is provided in the evaporating dish 13. The stop-boiling plate is a porous flat plate structure and is horizontally mounted on the fixing frame 21 at a height corresponding to the second water level line in the evaporating dish 13. The stop-boiling plate is used to suppress the noise generated when the water in the evaporating dish 13 boils, thereby improving the user experience.

[0065] like Figure 2 As shown, in one embodiment of the present invention, a water spout 23, a valve seal 24 covering the water spout 23, a valve core 25 movably arranged in the water spout 23, and a spring 26 arranged in the water spout 23 for pushing the valve core 25 to seal against the valve seal 24, a filter cover 27 is provided on the outer cover of the water spout 23 in the water tank 16, and a water outlet 28 for water to pass through is provided in the middle of the valve seal 24; when the valve core 25 is pressed against the valve seal 24, the valve core 25 blocks the water outlet 28; when the valve core 25 is away from the valve seal 24, the water outlet 28 is communicated with the water spout 23.

[0066] Correspondingly, a water inlet nozzle 29 is provided on the main housing 11 at a position corresponding to the water outlet nozzle. The water inlet nozzle 29 is provided with a docking nozzle 30 which can be inserted into the valve seal 24 to push the valve core 25 away from the valve seal 24 .

[0067] When the water storage tank 16 is removed from the main housing 11, the spring 26 pushes the valve core 25 against the valve seal 24 under the action of its own elastic restoring force, so that the valve core 25 blocks the water outlet 28 to form a seal, and the water in the water storage tank 16 cannot flow out through the lower nozzle 23. When the water storage tank 16 is installed on the main housing 11, the water inlet nozzle 29 on the main housing 11 is inserted into the valve seal 24 and pushes the valve core 25 upward, so that the spring 26 is compressed, the valve core 25 is away from the valve seal 24, the water outlet 28 is connected with the lower nozzle 23, and the water in the water storage tank 16 can flow into the docking nozzle 30 through the lower nozzle 23 and the water outlet 28.

[0068] This design allows the water storage tank 16 to be freely separated from the main housing 11 without water leakage after separation, allowing water to be added or the inside of the water storage tank 16 to be cleaned by removing the water storage tank 16 to ensure hygiene.

[0069] The split structure of the water storage tank 16 not only limits the water in the evaporation dish 13 to always be at a low water level by storing water for standby use, and quickly provides steam to the outside after starting up, but also provides enough spare water, and allows the water storage tank 16 to be taken out and refilled with water during operation to meet the demand for long-term steam supply. Compared with the traditional technology equipped with only the evaporation dish 13, this embodiment allows the water storage tank 16 to be replenished with water during operation, and unlimited water and unlimited steam can be provided, which provides a better application experience.

[0070] Further, as an option, if Figure 3 As shown, in the water supply channel in the protruding spout 31, an upper water level detector 33 is also provided. The upper water level detector 33 is a non-contact liquid level sensor, which is installed in the water supply channel together with the float with a built-in magnetic ring. The upper water level detector 33 is insulated and installed in the inner ring where the float is located, and the float floats with the water level in the water replenishment port. When the water level in the water replenishment port is sufficient, the float floats up, and the upper water level detector 33 outputs a signal of "sufficient water level" to the control circuit board 37 electrically connected thereto; when the water level in the water replenishment port is insufficient, the float sinks, and the output state of the upper water level detector 33 is reversed, and is recognized by the control circuit board 37 as "insufficient water level".

[0071] The effective sensing height of the upper water level detector 33 is higher than the monitoring height detected by the lower water level detector 32, and is used to detect the water level in the water supply channel in the protruding spout 31, and indirectly detect the water level of 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 amount of water in the water supply channel in the protruding spout 31 is already very small, which is insufficient to support the continued operation of the steam generator. The control circuit board 37 can cut off the power supply of the electric heating element at the bottom of the evaporating dish 13 and stop evaporation, which serves as a third layer of protection to prevent the evaporating dish 13 from drying out. At the same time, a water shortage prompt or abnormal alarm can be made on the operation display panel 38 as needed.

[0072] In one or more embodiments of the present invention, the three-layer dry-burning protection function has the following action sequence: under normal circumstances, the third layer protection function (if provided) is first activated to provide dry-burning protection; if in some embodiments, the third layer protection function is not provided, or the third layer protection function is abnormal or invalid, then when the water level in the water supply channel in the protruding spout 31 continues to drop to a certain level, the second layer protection function is triggered; if both the third layer protection and the second layer protection are abnormal or invalid, then when the water in the evaporating dish 13 is completely evaporated, the temperature of the bottom of the evaporating dish 13 will exceed the boiling temperature of water under the heating of the electric heating element, and when the temperature reaches the action temperature of the temperature switch fixed at the bottom of the evaporating dish 13, the internal contacts of the temperature switch connected in series with the electric heating element will be tripped, and the power supply of the electric heating element will be cut off, so that it stops heating the evaporating dish 13, that is, the first layer of dry-burning protection takes effect. The beneficial effects of the implementation of this embodiment are: 1. providing more layers of dry-burning protection for the steam generator to make it safer, especially in applications of long-term work and remote control, this function is more necessary; 2. prompts and alarms can be given in time through the operation display panel 38, so that the user can add water in time, or deal with possible abnormalities in time.

[0073] To facilitate the installation and removal of the evaporation cover 15, a convex buckle 44 is provided on the edge of the cover body 39 protruding from the side wall of the cover body 39, a buckle groove 45 is provided on the side wall at the opening 14 for the convex buckle 44 to be rotatably inserted into, and a notch 46 is also provided on the side wall at the opening 14 for the steam nozzle 41 to be embedded and accommodated.

[0074] When installing the evaporation cover 15 , align the steam nozzle 41 with the position of the notch 46 , insert the convex buckle 44 into the buckle groove 45 and tighten it, so that the evaporation cover 15 can be fixedly installed.

[0075] In this embodiment, a ventilation grille 49 is further provided on the base 12 to provide a necessary heat dissipation channel for the bottom of the evaporating dish 13, thereby preventing the bottom of the evaporating dish 13 from being too high in temperature, thereby causing deformation of the housing 11 and the base 12, or affecting the life of the main housing 11 and the base 12, and also preventing excessive temperature from penetrating through the isolation cover 36, thereby causing the temperature of the control circuit board 37 inside to be too high, thereby causing damage to components.

[0076] In another embodiment, the steam generator is further equipped with a variety of steam application accessories, which are composed of a mist guide channel and a mist outlet head connected to each other. The head end of the mist guide channel is connected to the steam nozzle on the evaporation cover 15, and the end is connected to the mist outlet head. The mist outlet head has different structures according to different uses, wherein:

[0077] The steam application accessories for sauna use have a mist guide channel that is a hose and a mist outlet that is a box-shaped structure with multiple holes on the lower side, which guides the steam to be output from the multiple holes on the lower side to prevent the steam from flowing into a large beam and spraying directly upwards to cause scalding accidents.

[0078] The steam application accessory for humidification has a mist guide channel made of hard material to guide the mist upward; the mist outlet head can be installed above the mist guide channel in a horizontally turnable manner, and the possible condensed water is sent back to the evaporating dish 13 through the mist guide channel to prevent the condensed water from dripping.

[0079] The steam application accessory for steaming and heating has a mist outlet head in the shape of a bowl with an opening at the top. A container containing items to be steamed is placed on the bowl-shaped opening of the mist outlet head. The items to be steamed are heated by steam, and the container containing the items to be steamed serves as an isolation device.

[0080] The steam application accessories for heating have a mist guide channel connected to a radiator (such as a radiator, a mattress with a built-in coil, etc.), which is a double-tube sealed type, and a driving device for driving the steam circulation is provided in the mist guide channel.

[0081] The steam application accessory for aromatherapy is a container for placing aromatherapy fragrances on the mist outlet head of the steam application accessory for sauna and / or humidification, so that the aromatherapy fragrances are emitted into the air along with the flow of steam.

[0082] like Figure 5 As shown, in another embodiment of the present invention, in the water replenishment assembly, the part fixed to the bottom of the water storage tank 16 has the same structure as the above embodiment, and the part from the water inlet nozzle 29 to the docking nozzle 30 fixed on the main shell 11 also has the same structure as the above embodiment. The difference is that in this embodiment, the docking nozzle 30 is directly connected to the water supply channel in the protruding nozzle 31 through a pipeline (without the need to be connected through a water pump). Correspondingly, the upper cover of the water storage tank 16 is provided with a sealing cover 48 that seals the water storage tank 16, and the water storage tank 16 is sealed by the sealing cover 48; and there is no need to use the lower water level detector in the above embodiment.

[0083] Figure 5It is only a schematic diagram of principle, and the specific structure does not need to be drawn. The drain pipe 47 in the protruding mouth opens at the lower end of the protruding mouth and is inserted into the interior of 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. Under the action of gravity, the water in the water storage tank 16 flows downward along the water replenishment component and the drain pipe 47 and enters the evaporating dish 13 to replenish the evaporating dish 13 with water, and the water level rises. At the same time, since the upper end of the water storage tank 16 is sealed, a negative pressure is formed above the water surface of the water storage tank 16 to prevent the water from continuing to flow downward. Since the density of air 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 to balance 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 entering the water storage tank 16 is blocked, the pressure in the water storage tank 16 is in a balanced state, and the water no longer continues to flow into the evaporating dish 13. This cycle allows the water level of the evaporating dish 13 to reach a substantially constant state, thereby obtaining the same control result as in the above embodiment.

[0084] The benefits of implementing this embodiment are: ① The mechanical constant water level control method replaces the electric constant water level control method in the above embodiment, which has high reliability; ② The water pump, lower water level detector and other devices are eliminated, the structure is simplified, the cost is lower, and the control is simpler.

[0085] In addition, in the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "connected", "through", etc. should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present invention, the terms "water level" and "water level line" related to the water surface height are not necessarily limit marks marked somewhere in a container, channel, pipeline, etc., but should be understood in a broad sense. For example, a water level detector is installed somewhere in a container, channel, pipeline, etc. When the water surface inside the container, channel, pipeline, etc. is higher than a certain level, the output state of the water level detector will be triggered to flip; and when the water surface inside the container, channel, pipeline, etc. 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 output state of the water level detector to flip become the real "water level" and "water level line" that actually exist and play a role in work.

[0087] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steam generator, characterized in that: The steam generator comprises a main shell, a base fixedly mounted on the bottom of the main shell, an evaporation dish installed in the main shell, an opening arranged on the main shell opposite to the evaporation dish, an evaporation cover arranged at the opening for guiding the steam generated in the evaporation dish, a protrusion fixed on the main shell and inserted into the bottom of the inner side of the evaporation dish, a detachable water storage tank arranged on the main shell, a water replenishment component arranged between the water storage tank and the evaporation dish for guiding the water in the water storage tank into the evaporation dish, and a control system with a control circuit board as the core; The evaporating dish is sealed and butted against the main shell, and an electric heating element is fixed on the outer side of the bottom; The main shell and the evaporation cover are sealed and connected; The protruding spout is inserted into the inner bottom of the evaporating dish, and a water supply channel is provided inside. The lower end opens at the water supply channel at the bottom of the protruding spout, and a lower water level detector is provided to detect the water level in the evaporating dish; The evaporation cover is provided with a steam nozzle for steam output; The water replenishment assembly is detachable, with one part fixed to the bottom of the water storage tank, and in a sealed state when the water storage tank is separated 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 assembly is connected, so that the water storage tank and the main shell are connected; The water replenishment component introduces the water in the water storage tank into the evaporation dish when the water level in the evaporation dish is lower than the low water level, and stops introducing the water in the water storage tank into the evaporation dish when the water level in the evaporation dish is higher than the high water level; The main housing is provided with a hollow boss protruding from the main housing, an operation display panel electrically connected to the control circuit board is installed on the top surface of the boss, an isolation cover is fixedly installed inside the boss, and the control circuit board is installed in the isolation cover; The control system is provided with at least two levels of dry-burning protection devices, wherein: the first level of dry-burning protection device is a temperature switch fixed to the outer side of the bottom of the evaporating dish; the second level of dry-burning protection device detects the water level in the evaporating dish by the lower water level detector, and the control circuit board performs dry-burning 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 annular flange extending outward, and the steam generator further comprises a bracket which is arranged on the periphery of the evaporating dish and is used to support the annular flange, and the bracket is provided with a fixing hole which is fixedly connected with the main shell.

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 further comprises a fixing frame detachably connected to the bracket and used for clamping the annular flange. A second sealing ring is provided between the fixing frame and the main shell.

4. The steam generator according to claim 1, characterized in that: The part of the water replenishment assembly fixed to the bottom of the water storage tank includes a water nozzle, a valve seal covering the water nozzle, a valve core movably arranged in the water nozzle, and a spring arranged in the water nozzle for pushing the valve core to seal against the valve seal; a water outlet hole for water flow to pass through is provided in the center of the valve seal; when the valve core is pressed against the valve seal, the valve core blocks the water outlet hole; when the valve core is away from the valve seal, the water outlet hole is communicated with the water nozzle; Correspondingly, the part of the water replenishment assembly fixed on the main shell is provided with a water inlet nozzle at a position corresponding to the lower water nozzle at the bottom of the water tank, and the water inlet nozzle is provided with a docking nozzle; when the water tank is placed on the main shell, the docking 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 to allow the water replenishment assembly to pass through, and the lower edge of the valve seal is tightly pressed against the upper edge of the water inlet nozzle to form a cylindrical seal between the two.

5. The steam generator according to claim 1, characterized in that: The inner bottom of the water storage tank is located at the periphery of the downspout and is covered with a filter cover.

6. The steam generator according to claim 1 or 4, characterized in that: The control system is further provided with a third-level dry-burning protection device, which is implemented by an upper water level detector in cooperation with the control circuit board electrically connected thereto, and the upper water level detector is installed at the docking nozzle to detect the water level in the docking nozzle; when the upper water level detector detects that there is a lack of water at the docking nozzle, the control circuit board identifies that the water storage tank is detached from the main shell, or that the water in the water storage tank has been used up, and the control circuit board controls the steam generator to stop working to prevent the evaporating dish from drying out.

7. The steam generator according to claim 1 or 4, characterized in that: A water pump is also provided in the protruding mouth. The water pump is provided with an inlet and an outlet. The inlet is connected to the docking mouth through a pipeline, and the outlet is connected to the water replenishment port in the protruding mouth.

8. The steam generator according to any one of claims 1 to 7, characterized in that: The evaporation cover comprises a cover body that can be covered at the opening, a hollow handle fixed on the cover body, an automatic pressure relief valve fixed on the hollow handle, and a convex buckle provided on the edge of the cover body and protruding from the side wall of the cover body; The hollow handle is a bridge type, and is fixed on the cover body through two connecting piers, one of which is hollow, and connects the evaporating dish covered under the cover body with the steam nozzle; The automatic pressure relief valve is in communication with the steam nozzle; Correspondingly, a buckle groove for the convex buckle to be rotated and inserted is provided on the side wall of the opening of the main shell, and a notch for the steam nozzle to be embedded and accommodated is also provided on the side wall of the opening.

9. The steam generator according to claim 1 or 4, characterized in that: The docking nozzle on the main shell is directly connected to the bottom of the protruding nozzle through a pipeline; correspondingly, the water tank upper cover is provided with a sealing sheet and a buckle, so that the water tank upper cover can be positioned and buckled onto 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 connected to the steam nozzle directly or through a pipeline, making the steam generator multifunctional. The steam application accessories include sauna accessories, cooking accessories, heating accessories, humidification accessories, and aromatherapy accessories.

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