A device for generating superheated steam at normal pressure

Abstract

The utility model discloses a normal pressure superheated steam generating device, comprising a boiler, a saturated steam heater and a water supply device; the bottom of the water supply device is connected to the bottom of the boiler via a water pipe, the top of the water supply device is connected to the top of the boiler via an air pipe, the top of the boiler is also connected to the saturated steam heater, the saturated steam heater is connected to the external atmospheric environment, and the water supply device is also connected to a raw water source; the raw water in the water supply device enters from the bottom of the boiler, the boiler heats the raw water entering the bottom to boil and generates saturated steam, the saturated steam enters the saturated steam heater and is heated to become superheated steam and is discharged; a water level controller is arranged in the water supply device, the water level controller controls the on and off of the raw water source, so that the water level in the water supply device and the water level in the boiler maintain a constant height together. The device of the utility model can stably and continuously generate superheated steam under normal pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of superheated water steam production equipment, in particular to a normal pressure superheated water steam generating device. Background Art

[0002] Superheated steam is widely used in high-end fields such as power generation, petrochemicals, and pharmaceuticals, and is basically used in large-scale equipment, while small electrical equipment such as humidifiers and cooking machines generally use saturated steam.

[0003] However, there are the following problems with using saturated steam. For example, in a humidifier, the saturated steam generated may be attached in the form of water droplets when colliding with the steam atomization tube, etc., so that condensation occurs on furniture and glass doors and windows, and mold grows over time. Especially when used in medical systems, there are major health risks.

[0004] Currently, if you want to use superheated steam in small equipment, you need to use the pressurized high-temperature steam method used in large equipment, that is, by boiling water under pressure above atmospheric pressure to generate high-temperature steam (superheated steam) above 100°C, or reheating saturated steam to become superheated steam, and using this superheated steam in steam equipment for humidification, cooking, etc.

[0005] However, since saturated steam is generated by the boiling of water inside the boiler, there is a problem with the boiler in the prior art. That is, as the water inside the boiler decreases, the raw water supply source is directly supplied to the boiling water surface in the boiler, the temperature inside the boiler drops instantly, and the boiling stops. Steam will not be generated again until it starts boiling again. This makes it impossible to generate continuous and stable saturated steam, affecting the stability of superheated steam production.

[0006] In addition, in order to generate high-temperature and high-pressure steam, a pressure vessel with pressure resistance is required, but such a pressure vessel is complex and needs to be operated and maintained by technicians with professional knowledge and professional qualifications. At the same time, due to the high pressure inside the pressure vessel, there is a risk of explosion.

[0007] Therefore, the prior art needs to be improved. Utility Model Content

[0008] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a normal-pressure superheated steam generating device, which is intended to stably and continuously generate superheated steam under normal pressure.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A normal pressure superheated steam generating device, comprising a boiler, a saturated steam heater and a water supply device;

[0011] The bottom of the water supply device is connected to the bottom of the boiler via a water pipe, the top of the water supply device is connected to the top of the boiler via an air pipe, the top of the boiler is also connected to the saturated steam heater, the saturated steam heater is connected to the external atmospheric environment, and the water supply device is also connected to a raw water source;

[0012] The raw water in the water supply device enters from the bottom of the boiler, and the boiler heats the raw water entering from the bottom to boil to generate saturated steam. The saturated steam enters the saturated steam heater, is heated, and becomes superheated steam and is discharged;

[0013] A water level controller is provided in the water supply device, and the water level controller controls the on-off of the raw water source so that the water level in the water supply device and the water level in the boiler maintain a constant height.

[0014] In some examples, the saturated steam heater is provided with a porous channel and a first heater coated on the outer wall of the porous channel, and the saturated steam enters the porous channel and is heated to become superheated steam.

[0015] In some examples, the porous channel is composed of a plurality of metal tubes bundled together;

[0016] Or, the porous channel is formed by machining a plurality of holes axially through a whole metal rod;

[0017] Alternatively, the porous channel is formed by an extruded porous profile.

[0018] In some examples, in a vertical cross section along the length direction of the porous channel, the maximum length of a line segment connecting any two points within a single hole cross section shape is less than 5 mm.

[0019] In some examples, a temperature control device is further included, the temperature control device is electrically connected to the first heater, and is used to control the temperature of the discharged superheated water vapor to be greater than 250 degrees.

[0020] In some examples, the boiler includes a heating chamber located at a lower portion and a steam chamber located at an upper portion, the water supply device includes a water storage chamber located at a lower portion and an air chamber located at an upper portion, the water storage chamber and the heating chamber are connected via a water pipe, the steam chamber and the air chamber are connected via an air pipe, and the steam chamber is also connected to the saturated steam heater.

[0021] In some examples, the distance from the boiling water surface in the boiler to the top of the boiler is greater than or equal to 2 cm.

[0022] In some examples, a second heater is provided in the boiler, and the second heater is a plug-type insulated electric heating tube that can be inserted and installed in the lower part of the boiler.

[0023] In some examples, the outer wall of the second heater is covered with a removable anti-scaling protective cover.

[0024] In some examples, the second heater is further electrically connected to a power regulator.

[0025] It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described below (such as implementation methods) can be combined with each other to form new or preferred technical solutions. Due to space limitations, they will not be described one by one here.

[0026] Beneficial effects of the utility model:

[0027] 1. When the water supply device supplies water to the boiler, the water is introduced from the bottom of the boiler. This will not lower the temperature of the boiler water surface, but can keep the water in the boiler boiling, avoiding the interruption of saturated steam generation, so that superheated steam can be output stably and continuously.

[0028] 2. The saturated steam heater is directly connected to the external atmosphere, and the working pressure in the entire device is close to the external air pressure. Therefore, there is no risk of explosion and the high cost of traditional pressure vessels is not required. It not only produces superheated steam safely and stably with a simple structure, but also does not require the operating qualifications of special equipment for handling high-pressure gases.

[0029] 3. A water level controller is installed in the water supply device so that the water level in the water supply device and the water level in the boiler are kept at a constant height, so that there is always enough space in the boiler to separate the boiling water from the saturated steam. At the same time, the top of the boiler and the top of the water supply device are connected by an air duct for balancing the air pressure, so that the whole device can avoid the resonance caused by the water circulation between the water supply device and the boiler, and can continuously, stably and efficiently generate superheated steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of Example 1 of a normal-pressure superheated water steam generating device of the utility model.

[0032] Figure 2 It is a schematic diagram of the structure of the saturated steam heater of the utility model.

[0033] Figure 3It is a structural schematic diagram of the water supply device of the utility model.

[0034] Figure 4 It is a structural schematic diagram of the utility model boiler.

[0035] Figure 5 It is a cross-sectional schematic diagram of the first embodiment of the porous channel of the utility model.

[0036] Figure 6 It is a cross-sectional schematic diagram of the second embodiment of the porous channel of the utility model.

[0037] Figure 7 It is a cross-sectional schematic diagram of the third embodiment of the porous channel of the utility model.

[0038] Figure 8 This is a schematic diagram of the second heater sleeve of the utility model being provided with an anti-scaling protective sleeve.

[0039] Reference numerals:

[0040] 100-shell breaker, 10-boiler, 11-heating chamber, 111-water inlet, 12-steam chamber, 121-air outlet, 13-tube, 14-first sealing end cover, 20-saturated steam heater, 21-air inlet, 22-air outlet, 23-porous channel, 231-single hole, 24-first heater, 25-second air hole, 26-tee joint, 27-sealing ferrule, 30-water supply device, 31-water storage chamber, 311 -water outlet hole, 32-air chamber, 321-raw water hole, 322-first air hole, 33-second sealing end cover, 34-third sealing end cover, 40-water pipeline, 50-air pipeline, 60-raw water source, 70-water level controller, 81-temperature control device, 82-second heater, 83-power regulator, 84-temperature sensor, 90-anti-scaling protective cover, 101-conducting wire, 200-saturated steam, 300-superheated steam. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0045] In this specification, normal pressure refers to "the pressure when there is no particular reduction or increase in pressure; the pressure is usually equal to atmospheric pressure and is within the range of one atmosphere above and below.

[0046] The utility model includes the following embodiments.

[0047] Please refer to Figures 1 to 4 This embodiment provides a normal-pressure superheated steam generating device 100 , including a boiler 10 , a saturated steam heater 20 and a water supplier 30 .

[0048] The water supplier 30 is used to provide raw water to be heated to the boiler 10 . The boiler 10 generates saturated steam 200 after heating the raw water. The saturated steam heater 20 reheats the saturated steam 200 to generate superheated steam 300 .

[0049] Specifically, Figure 1 As shown in the figure, the bottom of the water supply device 30 is connected to the bottom of the boiler 10 via a water pipe 40, the top of the water supply device 30 is connected to the top of the boiler 10 via an air pipe 50, the top of the boiler 10 is also connected to the saturated steam heater 20, the saturated steam heater 20 is connected to the external atmospheric environment, and the water supply device 30 is also connected to a raw water source 60.

[0050] The raw water source 60 can be tap water with its own pressure; the raw water source 60 can also be water drawn from a specific water tank or a water storage tank by a pump.

[0051] The bottom of the water supply device 30 is connected to the bottom of the boiler 10 by a water pipe 40, so the raw water entering the water supply device 30 from the raw water source 60 will enter the bottom of the boiler 10 from the bottom of the water supply device 30 through the water pipe 40. Since the saturated steam heater 20 is connected to the external atmospheric environment, and the saturated steam heater 20 is connected to the inside of the boiler 10 through the top of the boiler 10, the boiler 10 is indirectly connected to the atmosphere. At the same time, the water supply device 30 is connected to the top of the boiler 10 through the air pipe 50, so that the inside of the water supply device 30 is also indirectly connected to the atmosphere. The air pipe 50 maintains the pressure balance between the water supply device 30 and the boiler 10. When the normal pressure superheated steam generator 100 is working, the pressure inside the boiler 10 is slightly higher than the external air pressure, but because the superheated steam is under the external air pressure when it is discharged to the outside, it becomes normal pressure superheated steam.

[0052] In this embodiment, Figure 1 As shown in the figure, the boiler 10 includes a heating chamber 11 located at the bottom and a steam chamber 12 located at the top, and the water supply device 30 includes a water storage chamber 31 located at the bottom and an air chamber 32 located at the top, the water storage chamber 31 is connected to the heating chamber 11 through a water pipe 40, the steam chamber 12 is connected to the air chamber 32 through an air pipe 50, and the steam chamber 32 is also connected to the saturated steam heater 20.

[0053] The heating chamber 11 at the bottom of the boiler 10 is used to load raw water and heat the raw water to boil, while the steam chamber 12 at the top is used to separate the boiling water from the saturated steam. The water storage chamber 31 at the bottom of the water supply device 30 is used to connect the raw water from the external water source and supply water to the boiler 10, and the air chamber 32 at the top of the water supply device 30 is used to communicate with the steam chamber 12 of the boiler 10, so as to maintain the pressure balance in the boiler 10 and the water supply device 30.

[0054] Specifically, Figures 2 to 4 As shown, a water outlet hole 311 is provided at the bottom of the water storage chamber 31, a water inlet hole 111 is provided at the bottom of the heating chamber 11, a raw water hole 321 and a first air hole 322 are provided at the top of the air chamber 32, and an air outlet 121 is provided at the top of the steam chamber 12.

[0055] In this embodiment, a three-way joint 26 is provided at the lower end of the saturated steam heater 20, an air inlet 21 is provided at the lower end of the three-way joint 26, a second air hole 25 is opened on the side wall of the three-way joint 26, and an exhaust port 22 is provided at the upper end of the saturated steam heater 20.

[0056] The boiler 10 of this embodiment is tubular, and includes a tubular tube 13, the top opening of the tube 13 is the gas outlet 121 of the steam chamber 12, and the bottom of the tube 13 is provided with a first sealing end cover 14, and the first sealing end cover 14 is provided with the water inlet 111. The top of the tube 13 is sealed and connected to the three-way joint 26 of the saturated steam heater 20 through a sealing sleeve 27.

[0057] The water supply device 30 of this embodiment is also tubular, with a second sealing end cover 33 disposed on the top of the water supply device 30, a third sealing end cover 34 disposed on the bottom of the water supply device 30, a raw water hole 321 and a first air hole 322 disposed on the second sealing end cover 33, and a water outlet hole 311 disposed on the third sealing end cover 34. A water pipe 40 is connected between the water outlet hole 311 and the water inlet hole 111, an air pipe 50 is connected between the first air hole 322 and the second air hole 25, and the raw water hole 321 is connected to a raw water source 60.

[0058] It can be understood that in other embodiments, the boiler 10 and the water supplier 30 can also adopt other shapes.

[0059] The raw water in the water supply device 30 of this embodiment enters from the bottom of the boiler 10, that is, the raw water in the water supply device 30 enters the heating chamber 11 at the bottom of the boiler 10 from the water outlet 311, the water pipe 40, and the water inlet 111. The boiler 10 heats the raw water entering from the bottom to boil and generates saturated steam 200. The saturated steam 200 enters the saturated steam heater 20, is heated, and becomes superheated steam 300 and is discharged.

[0060] Preferably, the saturated steam heater 20 of this embodiment is provided with a first heater 24, which heats the saturated steam entering the saturated steam heater 20 from the boiler 10 and converts it into superheated steam. The superheated steam generated by the saturated steam heater 20 is discharged to the outside and used in various scenarios, such as air humidification, cooking, medical disinfection, etc.

[0061] Preferably, the boiler 10 of this embodiment is provided with a second heater 82 . Specifically, the second heater 82 is provided in the heating chamber 11 of the boiler 10 to heat and boil the raw water to generate saturated steam.

[0062] like Figure 1 As shown in FIG. 1 , a water level controller 70 is provided in the water supply device 30 of this embodiment. The water level controller 70 controls the on-off of the raw water source 60 so that the water level in the water supply device 30 and the water level in the boiler 10 maintain a constant height.

[0063] The water supply device 30 of this embodiment is arranged outside the boiler 10 and is arranged in parallel with the boiler 10. On the one hand, the water supply device 30 controls the on and off of the raw water through the water level controller 70 to stably supply water to the boiler 10. On the other hand, it keeps the water level in the boiler 10 at a constant height so that there is enough space in the steam chamber 12 in the boiler 10 to separate the boiling water and the saturated steam well to obtain sufficient saturated steam. At the same time, it can prevent the water in the boiler 10 from flowing back from the air outlet 50 to the water supply device 30 and affecting the stability of the entire device 100.

[0064] The atmospheric pressure superheated steam generating device 100 of the present embodiment comprises an atmospheric pressure boiler 10. A heating chamber 11 in the boiler 10 allows raw water inside the boiler 10 to boil to generate saturated steam. A steam chamber 12 for separating boiling water and saturated steam is provided on the upper part of the heating chamber 11. A saturated steam heater 20 is connected above the steam chamber 12. The saturated steam heater 20 can control the heating temperature of the saturated steam. After the steam chamber 12 is filled with saturated steam, the saturated steam flows into the saturated steam heater 20 and becomes superheated steam after being heated and discharged into the air.

[0065] A water supply device 30 is provided in parallel with the boiler 10 of this embodiment. A water outlet 311 is provided below the water supply device 30 and is connected to a water inlet 111 below the boiler 10. A raw water source 60 and a first air hole 322 connected to the boiler 10 are connected above the water supply device 30. A water level controller 70 is provided inside the water supply device 30.

[0066] According to the above structure, the raw water of this embodiment boils in the heating chamber 11 of the boiler 10, and saturated steam is discharged from the steam chamber 12 in the boiler 10 to the saturated steam heater 20. The bottom of the boiler 10 and the water supply device 30 are connected through the water pipe 40. When the raw water in the boiler 10 decreases, the raw water in the water supply device 30 flows to the heating chamber 11 of the boiler 10 through the siphon principle. Since the water inlet 111 is arranged at the lower part of the heating chamber 11 of the boiler 10, the water flowing out from the water outlet 311 of the water supply device 30 is supplied from the bottom of the heating chamber 11. Since the boiling water in the heating chamber 11 is lighter than the normal temperature water flowing in from the water supply device 30, the boiling water is always located above the boiler 10 and does not contact the normal temperature water flowing in from the bottom. Therefore, the water surface temperature of the saturated steam generated in the boiler 10 will not be caused by the addition of new raw water as in the prior art, resulting in an instantaneous drop in temperature and interruption of the production of saturated steam. In this way, the generating device 100 of the utility model can maintain that when the raw water is added to the boiler, the water in the boiler 10 can still continue to boil, thereby continuously and stably generating saturated steam.

[0067] In addition, the saturated steam generated by heating inside the boiler 10 is discharged to the outside after being heated by the saturated steam heater 20 through the steam chamber 11, so the pressure inside the boiler 10 is not much different from the external air pressure. Therefore, the normal pressure superheated steam generating device 100 operates at a pressure that is not much different from the external air pressure, and does not need to work under a high pressure state through a complex device with the possibility of explosion, such as a traditional pressure vessel. Therefore, the device 100 of the embodiment of the utility model has a simple structure and can safely and stably generate superheated steam.

[0068] In addition, in the embodiment of the present invention, the water supply device 30 has the function of keeping the water levels in the water supply device 30 and the boiler 10 the same and constant. As a function of keeping the water level constant, the water level controller 70 can use an electronic water level sensor or a floating water level switch to automatically connect or disconnect the raw water source 60 when a predetermined water level is set. Specifically, for example, a floating water level switch connected to the water supply device with tap water with its own pressure as the raw water source; or an electronic water level sensor can be associated with a water pump to automatically draw water from a specific water tank or water storage tank.

[0069] According to the above structure, while the water level of the water supply device 30 is maintained at the specified water level, the water storage chamber 31 at the bottom of the water supply device 30 is connected to the water inlet 111 below the heating chamber 11 of the boiler 10, and water is supplied to the heating chamber 11 of the boiler 10 through the siphon principle. Since the boiler 10 and the water supply device 30 are separately arranged, a good heat separation effect is achieved, which avoids the problem that when the water level controller 70 is installed inside the boiler 10, the water surface of the heating chamber 11 of the boiler 10 fluctuates greatly due to the boiling of water, the error is large, and the cost of the heat-resistant water level controller 70 is high due to the high temperature of the water. On the contrary, in the embodiment of the utility model, since the water surface of the water supply device 30 is stable at room temperature, the measurement error of the water level can be reduced, the water level controller 70 does not need heat resistance, and a cheap water level controller 70 can be used, which also completely avoids the disadvantage of interruption of water boiling when directly supplying water to the boiler. That is to say, the water supply device 30 and the boiler 10 of the embodiment of the utility model are arranged in parallel. Through the siphon principle, the water supply device 30 supplies water to the heating chamber 11 of the boiler 10. As long as the water level of the water supply device 30 is balanced with the water level of the heating chamber 11 in the boiler 10, the heating chamber 11 will always maintain a certain water level boiling to continuously generate stable saturated steam.

[0070] Preferably, if Figure 1 and Figure 2 As shown, the saturated steam heater 20 of the embodiment of the utility model is provided with a porous channel 23, and the first heater 24 is coated on the outer wall of the porous channel 23. The saturated steam 200 enters the porous channel 23 and is heated to become superheated water vapor 300. That is, the outer wall of the porous channel 23 of the embodiment of the utility model is wrapped with the first heater 24 to heat the saturated steam entering the porous channel 23.

[0071] According to the above structure, after the saturated steam discharged from the steam chamber 12 enters the saturated steam heater 20, it enters the porous channel 23, is divided into multiple strands by multiple single tubes in the porous channel 23 and is heated by the bulkhead parts of the single tubes respectively. Different from the prior art structure with only one single tube, after the saturated steam in the embodiment of the utility model enters the porous channel 23, the contact area of ​​the channel tube wall is greatly increased, which also greatly increases the heating area of ​​the saturated steam in the saturated steam heater 20, so that the saturated steam can be heated more efficiently and quickly to generate superheated steam.

[0072] Preferably, the material of the porous channel 23 is aluminum alloy with good thermal conductivity.

[0073] Preferably, in the embodiment of the utility model, the first heater 24 is an electric heating wire surrounding the porous channel 23 .

[0074] As an implementation method, Figure 5 As shown, the porous channel 23 is composed of a plurality of metal tubes bundled together. An electric heating wire is wound around the outer wall of the whole formed by the plurality of metal tubes, and the electric heating wire heats the tube wall of each metal tube, so that after each metal tube is passed with saturated steam, the saturated steam of each tube can be deheated respectively. The porous channel 23 made of a plurality of metal tubes has a simple structure and is easy to process. The metal tubes can be round tubes or rectangular tubes.

[0075] As another embodiment, Figure 6 As shown, the porous channel 23 is formed by an extruded porous profile. That is, the porous channel 23 having multiple cavities is extruded from the profile, and this method can produce the porous channel 23 in batches and quickly.

[0076] As another embodiment, Figure 7 As shown, the porous channel 23 is formed by machining a plurality of channels axially through a whole metal rod, that is, a single metal rod is used to open a plurality of axial channels.

[0077] In the embodiment of the utility model, Figures 5 to 7 As shown, in the vertical cross section of the porous channel 23 in the length direction, the cross-sectional shape of the single hole 231 is a circular hole, a square hole, or a hexagonal hole.

[0078] Preferably, in a vertical section along the length direction of the porous channel 23, the maximum length of a line segment connecting any two points in the cross-sectional shape of a single hole 231 is less than 5 mm. Figures 5 to 7As shown in the figure, when the cross-sectional shape of a single hole 231 of the porous channel 23 is circular, the inner diameter of the single hole does not exceed 5 mm; when the cross-sectional shape of a single hole 231 of the porous channel 23 is a regular quadrangle or a regular hexagon, the diagonal length does not exceed 5 mm. In this way, the porous channel 23 with the same cross-sectional area can have more single holes 231, thereby increasing the contact area of ​​saturated steam and increasing the heating area of ​​saturated steam.

[0079] More preferably, in a vertical cross section in the length direction of the porous channel 23, the length of a line segment connecting any two points in the cross-sectional shape of a single hole 231 is 2 mm.

[0080] According to the above structure, the saturated steam heater 20 of the embodiment of the utility model has a simple structure. The porous channel 30 is wrapped with the electric heating wire as the first heater 24, so that the saturated steam has a larger heat source contact surface, and the superheated steam is generated more efficiently, and the production and manufacturing are relatively easy. Taking a single tube with a diameter of 2 cm and a length of 50 cm as an example, the saturated steam passes through the pipeline at a speed of 150 cm / second and can only stay in the pipeline for about 0.3 seconds. In order to ensure that the heat is transferred from the inner circumference of the pipeline to the saturated steam in the pipeline within such a short residence time, the surface area of ​​the saturated steam contacting the inner circumference of the pipeline must be increased. Therefore, the embodiment of the utility model adopts the porous channel 23 to increase the contact area of ​​the saturated steam, which is the most effective method.

[0081] In addition, as a method of providing a heating channel in the saturated steam heater 20, the interior of the saturated steam heater 20 may also be a honeycomb structure.

[0082] Preferably, if Figure 1 As shown, the device 100 of the present invention further includes a temperature control device 81, which is electrically connected to the first heater 24 and is used to control the temperature of the discharged superheated water vapor 300 to be greater than 250 degrees. The first heater 24 is connected to the temperature control device 81 through a wire 101, and the temperature control device 81 may include a single chip microcomputer, a power circuit, etc.

[0083] In one embodiment of the utility model, the saturated steam heater 20 includes a temperature sensor 84, and the temperature sensor 84 is electrically connected to the temperature control device 81 through a wire 101. In this embodiment, the temperature sensor 84 is installed on the wall surface of the outer diameter of the porous channel 23. The temperature sensor 84 collects the temperature of the outer wall of the porous channel 23 and feeds it back to the temperature control device 81. The temperature control device 81 controls the heating power of the first heater 24 according to the temperature value, and controls the heating temperature of the porous channel 23 by the first heater 24, so that the temperature of the superheated water vapor discharged from the saturated steam heater 20 is above 250°C. Preferably, the temperature control device 81 controls the temperature of the superheated water vapor discharged to be above 350°C, so that the superheated water vapor discharged can be completely prevented from condensing in the air and generating white mist, so as to prevent the white mist from adhering to furniture or equipment and breeding mold.

[0084] Preferably, as 1 and Figure 4 As shown, the second heater 82 of the embodiment of the utility model is a plug-type insulated electric heating tube that can be inserted and installed in the lower part of the boiler 10.

[0085] That is, in the embodiment of the utility model, the boiler 10 includes a heat source for generating saturated steam, which is the second heater 82. The second heater 82 is a plug-type single-threaded insulated electric heating tube. The lower part of the second heater 82 is fixed to the first sealing end cover 14 at the bottom of the boiler 10. When in use, the upper part of the second heater 82 is submerged in the water in the heating chamber 11 of the boiler 10 to heat and evaporate the water in the boiler 10. The plug-type insulated electric heating tube is easy to maintain and replace.

[0086] Furthermore, the second heater 82 is also electrically connected to a power regulator 83. Specifically, the second heater 82 is connected to the power regulator 83 via a wire 101. The power regulator 83 can adjust the heating output power of the second heater 82, such as by adjusting the voltage or current. After adjusting the heating output power, the production amount of saturated steam in the boiler 10 can be adjusted according to demand, so that the amount of saturated steam can be accurately controlled to ensure stable and normal operation of the device 100 and meet the use requirements.

[0087] Preferably, if Figure 8As shown, the outer wall of the second heater 82 is provided with a removable anti-scaling protective sleeve 90. Tap water with a high mineral content, such as calcium and magnesium, will form insoluble compounds such as calcium carbonate and magnesium carbonate during the heating process in the boiler 10, thereby forming scale and adhering to the second heater 82 of the electric heating tube type. As the scale increases, the heating effect of the electric heating tube will be seriously affected. In the embodiment of the utility model, a removable anti-scaling protective sleeve 90 is provided outside the electric heating tube to protect the electric heating tube. In this embodiment, the anti-scaling protective sleeve 90 is made of aluminum alloy material, and the inner diameter of the anti-scaling protective sleeve 90 is almost equal to the outer diameter of the second heater 82, which can effectively transmit the heat of the second heater 82 to heat the raw water and tightly wrap the second heater 82. In this way, during use, scale will adhere to the anti-scaling protective sleeve 90 but not to the electric heating tube, and then after a period of use, only the anti-scaling protective sleeve 90 needs to be replaced. The anti-scaling protective sleeve 90 of the embodiment of the utility model is easy to replace and maintain, which can effectively extend the service life of the second heater 82.

[0088] If the steam chamber 12 is not provided in the boiler 10 or the height of the steam chamber 12 is not high enough, after the saturated steam generated in the heating chamber 11 of the boiler 10 is heated by the saturated steam heater 20, due to the rapid heating, the saturated steam expands in the saturated steam heater 20, forming a so-called "hot wall", which makes it difficult for the saturated steam to pass through. During the heating process, the saturated steam heater 20 generates impedance in the porous channel 23, making it difficult for the saturated steam to pass through, thereby increasing the pressure of the steam chamber 12 at the top of the boiler 10, and the pressure rise is about 0.01-0.05 atmospheres. Since the pressure of the steam chamber 12 at the top of the boiler 10 is higher than the pressure of the water supply device 30, the water in the heating chamber 11 of the boiler 10 will flow back into the water supply device 30 through the air duct 50. This backflow causes the water level of the water supply device 30 to be higher than the water level of the boiler 10. When the water level difference reaches a certain amount and is higher than the thermal wall resistance, the water will return to the heating chamber 11 of the boiler 10 through the water pipe 40 that connects the water storage chamber 31 of the water supply device 30 with the heating chamber 11 of the boiler 10. After the water level in the heating chamber 11 rises, the pressure in the steam chamber 12 on the upper part of the boiler 10 rises again and flows back to the water supply device 30 again. The boiler 10 and the water supply device will repeatedly exchange water, which will generate the so-called inertial resonance phenomenon. Once the inertial resonance phenomenon occurs, the water surface of the water supply device 30 will be unstable, resulting in the inability to accurately measure the water level of the water level controller 70. In addition, since the boiling water in the boiler 10 flows back into the water supply device 30, the temperature of the warm water in the water supply device 30 will rise, which will seriously cause the water level measurement failure and accuracy of the water supply device 30.

[0089] On the contrary, in this embodiment, even when the pressure of the heating chamber 11 of the boiler 10 increases, since the steam pool 12 with sufficient space is provided on the upper part of the boiler 10, for example, the distance from the boiling water surface in the boiler 10 to the top of the boiler 10 in this embodiment is greater than or equal to 2 cm, that is, the height of the steam pool 12 is not less than 2 cm. In this way, the boiling water and the saturated steam in the boiler 10 are well separated, and the boiling water will not be directly sprayed out. Further, the height of the steam chamber 12 in the boiler 10 of the utility model embodiment is greater than or equal to the height of the heating chamber 11. At the same time, an air storage chamber 32 is provided on the upper part of the water supply device 30, and the normal temperature water below the air storage chamber 32 is neutralized with the weak steam from the steam chamber 12, so that the pressure of the boiler 10 and the water supply device 30 are equal. Therefore, after repeated verification, the superheated steam generator 100 of the utility model embodiment can completely prevent the resonance phenomenon of water between the boiler 10 and the water supply device 30. In addition, although the steam chamber 12 at the top of the boiler 10 has a pressure rise caused by the hot wall generated by the saturated steam heater 20, the rise is small, so it will not become a high pressure like a traditional pressure vessel. No matter how many hours the normal-pressure superheated steam generating device 100 of the present invention works continuously, there is no high pressure inside.

[0090] In addition, in the embodiment of the utility model, the saturated steam in the steam chamber 12 at the top of the boiler 10 is heated by the saturated steam heater 20 to become superheated steam and released into the external air, so that the pressure inside the boiler 10 is less than 1.1 atmospheres, and the working state of the entire device 100 is basically at normal pressure.

[0091] The normal pressure superheated steam generating device 100 of the utility model is provided with a boiler 10, a water supply device 30 is provided in parallel beside the boiler 10, a saturated steam heater 20 is provided at the exhaust end of the top of the boiler 10, and a water level controller 70 is provided in the water supply device 30. A water pipe 40 is connected between the bottom of the boiler 10 and the bottom of the water supply device 30, and an air pipe 50 is connected between the top of the boiler 10 and the top of the water supply device 30. In this way, when the water supply device 30 supplies water to the boiler 10, the water is introduced from the bottom of the boiler 10, which will not reduce the temperature of the water surface of the boiler 10, but can keep the water in the boiler 10 boiling, and prevent the saturated steam from stopping generating. In addition, a porous channel 23 is provided in the saturated steam heater 20 of the utility model, which can generate efficient and high-temperature superheated steam. The water level controller 70 in the water supply device 30 of the utility model keeps the water level in the boiler 10 constant, so that there is a stable steam chamber 12 in the boiler 10, avoiding the resonance caused by the water circulation between the water supply device 30 and the boiler 10, and can continuously and stably generate superheated water vapor, and work at a pressure close to the external air pressure, so that high pressure will not be generated, so there is no risk of any explosion, and the high cost of traditional pressure vessels is not required. The device 100 of the utility model not only generates superheated water vapor safely and stably with a simple structure, but also does not require the operating qualifications of special equipment for handling high-pressure gas, etc., greatly reducing the use and operation and maintenance costs.

[0092] At the same time, the structure and principle design of the atmospheric pressure superheated water steam generating device 100 of the utility model can make the whole device miniaturized. For example, if it is used in a household humidifier, the superheated water steam generating part of the household humidifier can be made very small, and the whole household humidifier using the atmospheric pressure superheated water steam generating device 100 can also be made very small, which is convenient for commercial promotion and application. It can be understood that the atmospheric pressure superheated water steam generating device 100 of the utility model can also be applied to the miniaturization of other equipment such as cooking equipment and medical disinfection equipment.

[0093] The above description is only an example to clearly illustrate the present invention, and does not limit the patent scope of the present invention. It is impossible to list all implementation methods here. All equivalent structural changes made by using the contents of the technical solution of the present invention under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A normal pressure superheated water steam generating device, characterized in that: Includes boiler, saturated steam heater and water supply; The bottom of the water supply device is connected to the bottom of the boiler via a water pipe, the top of the water supply device is connected to the top of the boiler via an air pipe, the top of the boiler is also connected to the saturated steam heater, the saturated steam heater is connected to the external atmospheric environment, and the water supply device is also connected to a raw water source; The raw water in the water supply device enters from the bottom of the boiler, and the boiler heats the raw water entering from the bottom to boil to generate saturated steam. The saturated steam enters the saturated steam heater, is heated, and becomes superheated steam and is discharged; A water level controller is provided in the water supply device, and the water level controller controls the on-off of the raw water source so that the water level in the water supply device and the water level in the boiler maintain a constant height.

2. The normal pressure superheated water steam generator according to claim 1, characterized in that: The saturated steam heater is provided with a porous channel and a first heater coated on the outer wall of the porous channel. The saturated steam enters the porous channel and is heated to become superheated steam.

3. The normal pressure superheated water steam generator according to claim 2, characterized in that: The porous channel is composed of a plurality of metal tubes bundled together; Or, the porous channel is formed by machining a plurality of holes axially through a whole metal rod; Alternatively, the porous channel is formed by an extruded porous profile.

4. The normal pressure superheated water steam generator according to claim 2, characterized in that: In a vertical cross section in the length direction of the porous channel, the maximum length of a line segment connecting any two points in a single hole cross section shape is less than 5 mm.

5. The normal pressure superheated water steam generator according to claim 2, characterized in that: It also includes a temperature control device, which is electrically connected to the first heater and is used to control the temperature of the discharged superheated water vapor to be greater than 250 degrees.

6. The normal pressure superheated water steam generator according to claim 1, characterized in that: The boiler includes a heating chamber at the bottom and a steam chamber at the top, and the water supply device includes a water storage chamber at the bottom and an air chamber at the top. The water storage chamber is connected to the heating chamber through a water pipe, and the steam chamber is connected to the air chamber through an air pipe. The steam chamber is also connected to the saturated steam heater.

7. The normal pressure superheated water steam generator according to claim 1, characterized in that: The distance from the boiling water surface in the boiler to the top of the boiler is greater than or equal to 2 cm.

8. The normal pressure superheated water steam generator according to claim 1, characterized in that: The boiler is provided with a second heater, which is a plug-type insulated electric heating tube and can be inserted and installed in the lower part of the boiler.

9. The normal pressure superheated water steam generator according to claim 8, characterized in that: The outer wall of the second heater is provided with a removable anti-scaling protective cover.

10. The normal pressure superheated water steam generating device according to claim 8, characterized in that: The second heater is also electrically connected to a power regulator.

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