Steam generating device

Abstract

The utility model discloses a steam generation device which comprises a fluid channel, the fluid channel comprises a pressure storage channel, a pressure release channel and a flow limiting hole, the steam generation device comprises a heating pipe, the pressure storage channel and the pressure release channel are located in the heating pipe, and the flow limiting hole communicates with the pressure storage channel and the pressure release channel. The flow area corresponding to the flow limiting holes (21) is S, and S is smaller than or equal to pi 3.52 mm < 2 >. Gas-liquid mixed fluid in the pressure storage channel flows through the flow limiting hole and enters the pressure release channel, and the flow area S of the flow limiting hole is smaller than or equal to pi 3.52 mm < 2 >, so that liquid which flows through the flow limiting hole and is not vaporized easily forms liquid drops with small sizes, the liquid drops are heated and vaporized more easily in the pressure release channel, the vaporization amount of the fluid is increased, and the pressure release effect is improved. The mixing amount of liquid in steam discharged by the steam generation device is reduced, and the use quality of the steam generation device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of home appliance, especially relates to a steam generating device. BACKGROUND

[0002] Some daily household appliances in use, often need to output steam through steam generating device, such as scrubber, in order to clean the ground, set up steam or hot water outlet at its contact surface with ground, to reach the effect of high efficiency decontamination, such as iron, set up steam outlet at its contact with clothes, to soften clothes and reach better ironing effect.

[0003] In the steam generating device in the related art, the efficiency of fluid flowing through the heating pipe and being heated and vaporized is low, so that the steam discharged often mixes with a large amount of liquid, which affects the normal use of the steam generating device. SUMMARY

[0004] The utility model discloses a steam generating device to at least solve the problems in the background art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A steam generating device, comprising a fluid passage, the fluid passage comprising a pressure accumulation passage, a pressure release passage and a flow limiting hole, the steam generating device comprising a heating pipe, at least part of the pressure accumulation passage and the pressure release passage being located in the heating pipe, the flow limiting hole being in communication with the pressure accumulation passage and the pressure release passage, the flow passage area corresponding to the flow limiting hole being S, S satisfying: S≤π3.5 2 mm 2 .

[0007] In the steam generating device of the above-mentioned technical scheme, the fluid in the pressure accumulation passage flows through the flow limiting hole and enters the pressure release passage, and the flow passage area of the flow limiting hole satisfies: S≤π3.5 2 mm 2 , so that the pressure accumulation passage can accumulate a certain pressure, and the fluid is ejected from the flow limiting hole under the action of the pressure, so that the liquid not vaporized flowing through the flow limiting hole is easy to form liquid droplets with small volume, which is more easy to be heated and vaporized in the pressure release passage, thereby increasing the vaporization amount of the fluid, reducing the mixing amount of liquid in the steam discharged by the steam generating device, and improving the use quality of the steam generating device.

[0008] The features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0009] The utility model will be further described in combination with the drawings and specific embodiments as follows:

[0010] Figure 1 Exploded structural diagram of a steam generating device according to an embodiment;

[0011] Figure 2 Exploded structural diagram of a connecting portion according to an embodiment;

[0012] Figure 3 Structural diagram showing a cover plate and a sealing ring according to an embodiment;

[0013] Figure 4 Structural diagram showing a cover plate according to an embodiment;

[0014] Figure 5 Structural diagram showing a cross section of a steam generating device according to an embodiment;

[0015] Figure 6 Structural diagram showing a cross section of a steam generating device according to another embodiment;

[0016] Figure 7 Structural diagram showing a cross section of a steam generating device according to another embodiment;

[0017] Figure 8 Structural diagram showing a cross section of a steam generating device according to another embodiment;

[0018] Figure 9 Structural diagram of a steam generating device according to an embodiment;

[0019] Figure 10 Structural diagram of a steam generating device according to an embodiment.

[0020] Reference signs:

[0021] 1, heating tube, 11, first tube, 12, second tube, 111, pressure storage passage, 121, pressure release passage, 13, electrode, 2, pressure storage portion, 21, flow limiting hole, 200, pressure storage member, 3, connecting portion, 31, base, 311, annular surrounding portion, 32, cover plate, 321, annular extending portion, 3211, annular groove, 322, first joint, 323, second joint, 33, sealing ring, 34, transition cavity, 41, first sealing sleeve, 42, second sealing sleeve, 5, outer shell, 51, mounting cavity, 52, mounting hole, 6, temperature controller. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0023] like Figures 1-10 As shown, a steam generating device of this embodiment includes a fluid channel, the fluid channel including a pressure storage channel 111, a pressure release channel 121, and a flow limiting hole 21. The steam generating device includes a heating tube 1, the pressure storage channel 111 and the pressure release channel 121 are located on the heating tube 1, and the flow limiting hole 21 connects the pressure storage channel 111 and the pressure release channel 121. The corresponding flow area is S, and S satisfies: S≤π3.5 2 mm 2 .

[0024] During the use of the steam generating device, the liquid fluid enters the pressure accumulating channel 111 from the inlet of the heating tube 1, the liquid fluid is preliminarily heated in the pressure accumulating channel 111, part of the liquid fluid is vaporized and forms a gas-liquid mixed fluid, and the gas-liquid mixed fluid flows through the flow limiting hole 21 and enters the pressure releasing channel 121. The flow area of ​​the flow limiting hole 21 is smaller than the flow area of ​​the pressure accumulating channel 111 and the pressure releasing channel 121. Since the flow area of ​​the flow limiting hole 21 is small, it is less than or equal to π3.5 2 mm 2 , which limits the size of the flow path of the liquid fluid, and prevents a large amount of unvaporized liquid fluid from entering the pressure release channel 121 in the form of gathering and clumping, making it difficult to form smaller droplets, thereby making it easy for the unvaporized liquid fluid to form smaller droplets, and the pressure release channel 111 further heats the droplets, thereby increasing the vaporization rate of the liquid fluid; on the other hand, under the action of the flow limiting hole 21, the pressure of the pressure storage channel 111 increases, which can make the unvaporized liquid fluid spray through the flow limiting hole 21 to the pressure release channel 121, thereby making it easier to form smaller droplets.

[0025] Further, when the pressure in the pressure storage channel 111 is high, the boiling point of the liquid in the pressure storage channel 111 is increased. For example, under normal circumstances, water in the pressure storage channel 111 vaporizes when the temperature of the water reaches 100 degrees Celsius. However, when the pressure in the pressure storage channel 111 is high, the water can be heated to a higher temperature, for example, the water in the pressure storage channel 111 can be heated to 105 degrees Celsius without vaporizing. When the water at a temperature higher than 100 degrees Celsius and not vaporized enters the pressure release channel 121, the pressure is instantaneously reduced, and thus the water vaporizes without additional heating. The presence of the water at a temperature higher than the normal boiling point fills the temperature drop when the steam or the steam mixed with the liquid is discharged from the steam generator, further increases the vaporization efficiency of the steam generator, reduces the amount of liquid mixed in the steam discharged from the steam generator, and improves the use quality of the steam generator.

[0026] The flow limiting hole 21 can be circular, and the hole inner diameter of the flow limiting hole 21 is less than or equal to 3.5 mm. Of course, in other embodiments, the shape of the flow limiting hole 21 can also be rectangular or other irregular shapes.

[0027] In one embodiment, as shown in Figures 1-7 The steam generator includes a connecting portion 3, the heating pipe 1 includes a first pipe 11 and a second pipe 12, the connecting portion 3 connects the first pipe 11 and the second pipe 12, at least part of the pressure storage channel 111 is located in the first pipe 11, at least part of the pressure release channel 121 is located in the second pipe 12, and the flow limiting hole 21 is arranged in the connecting portion 3.

[0028] In one embodiment, the connecting portion 3 includes a pressure storage portion 2, the flow limiting hole 21 is arranged in the pressure storage portion 2, the pressure storage portion 2 is part of the connecting portion 3, and the pressure storage portion 2 can extend into the inside of the first pipe 11 or be located outside the first pipe 11. When the pressure storage portion 2 is located inside the first pipe 11, the pressure storage channel 111 includes a channel between the pressure storage portion 2 and the inlet of the first pipe 11 in the first pipe 11, and the pressure release channel 121 includes a channel between the pressure storage portion 2 and the outlet of the first pipe 11 in the first pipe 11 and a channel in the second pipe 12. When the pressure storage portion 2 is located outside the first pipe 11 and not located in the second pipe 12, the pressure storage channel 111 includes a channel in the first pipe 11, and the pressure release channel 121 includes a channel in the second pipe 12. When the pressure storage portion 2 extends into the second pipe 12, the pressure storage channel 111 includes a channel in the first pipe 11 and a channel between the pressure storage portion 2 and the inlet of the second pipe 12 in the second pipe 12, and the pressure release channel 121 includes a channel between the pressure storage portion 2 and the outlet of the second pipe 12 in the second pipe 12.

[0029] It can be understood that the pressure of the pressure storage channel 111 is greater than the pressure of the pressure release channel 121 in the normal use of the steam generating device. In the normal use of the steam generating device, the fluid source continuously enters the pressure storage channel 111 and is blocked by the pressure storage part 2 (part of the fluid and steam are discharged to the pressure release channel 121 through the flow limiting hole 21, thereby increasing the pressure of the pressure storage channel 111, when the pressure of the pressure storage channel 111 reaches a certain value, the flow of the fluid and steam discharged to the pressure release channel 121 through the flow limiting hole 21 reaches a dynamic balance with the flow of the fluid entering the pressure storage channel 111, so that the output flow of the steam generating device reaches a dynamic balance.

[0030] The connecting part 3 facilitates the connection between the first pipe 11 and the second pipe 12, and can change the flow path of the fluid and improve the space of the steam generating device. In one embodiment, the first pipe 11 and the second pipe 12 are arranged side by side to save the occupied space of the steam generating device; of course, the first pipe 11 and the second pipe 12 can also be concentric or vertical or in other connection shapes.

[0031] In one embodiment, as shown in Figures 2-4 The connecting part 3 includes a cover plate 32, a first joint 322 sealingly connected with the first pipe 11, and a second joint 323 sealingly connected with the second pipe 12, and the first joint 322 and the second joint 323 are connected with the cover plate 32.

[0032] In one embodiment, the pressure storage part 2 is part of the first joint 322, the first joint 322 includes a first joint main part and the pressure storage part 2, the flow limiting hole 21 is arranged in the pressure storage part 2, and the pressure storage part 2 is integrally formed with the first joint main part or is fixed by welding or screwing, etc., and at least part of the pressure storage part 2 is located in the channel corresponding to the first joint main part, as shown in Figures 6-7 The first joint main part includes a first annular connecting part 3, and the first annular connecting part 3 is sleeved on the outlet end of the first pipe 11. Further, the outlet end of the first pipe 11 is sleeved with a first sealing sleeve 41, the first annular connecting part 3 is sleeved on the first sealing sleeve 41, and the first sealing sleeve 41 is in contact with or has a gap with the pressure storage part 2.

[0033] In another embodiment, the pressure storage part is part of the second joint 323, the second joint 323 includes a second joint main part and the pressure storage part 2, the flow limiting hole 21 is arranged in the pressure storage part 2, and at least part of the pressure storage part 2 is located in the channel corresponding to the second joint main part, the pressure storage part 2 is integrally formed with the second joint main part or is fixed by welding or screwing, etc., and the second joint main part includes a second annular connecting part 3, and the second annular connecting part 3 is sleeved on the inlet end of the second pipe 12. Further, the inlet end of the second pipe 12 is sleeved with a second sealing sleeve 42, the second annular connecting part 3 is sleeved on the second sealing sleeve 42, and the second sealing sleeve 42 is in contact with or has a gap with the pressure storage part 2.

[0034] In another embodiment, as shown in FIG. 2, the flow-restricting hole 21 is provided on the cover plate 32, and the flow-restricting hole 21 is opposite to the outlet end of the first pipe 11 or the inlet end of the second pipe 12. It can be understood that at least part of the cover plate 32 serves as the pressure-accumulating portion 2, and the flow-restricting hole 21 is provided on the pressure-accumulating portion 2. Figure 4 Figure 5 In one embodiment, the connecting portion 3 has a transition cavity 34, and the transition cavity 34 is in communication with the flow-restricting hole 21. The transition cavity 34 is in communication with the pressure-accumulating passage 111 and the pressure-releasing passage 121, and the fluid flows through the pressure-accumulating passage 111, the transition cavity 34, the flow-restricting hole 21 (the transition cavity 34 and the flow-restricting hole 21 are not in a specific order), and the pressure-releasing passage 121, and then is discharged from the steam generating device.

[0035] In one embodiment, the connecting portion 3 includes a base 31 and a cover plate 32 that are sealingly connected, at least part of the transition cavity 34 is located in the base 31 or the cover plate 32, and the first joint 322 and the second joint 323 are provided on the cover plate 32. Further, the base 31 has an annular surrounding portion 311, the transition cavity 34 is located in a space surrounded by the annular surrounding portion 311, and the cover plate 32 covers the annular surrounding portion 311, so that the transition cavity 34 is located in the base 31.

[0036] In one embodiment, the side of the cover plate 32 facing the base 31 has an annular extension 321, the annular extension 321 is sealingly connected with the annular surrounding portion 311 and forms the transition cavity 34, so that part of the transition cavity 34 is located in the base 31 and part of the transition cavity 34 is located in the cover plate 32. In one embodiment, the base 31 and the cover plate 32 are fixedly connected by screws, the side wall of the annular extension 321 of the cover plate 32 has an annular groove 3211, and the annular groove 3211 has a sealing ring 33 to ensure the sealing between the annular extension 321 and the annular surrounding portion 311, as shown in FIG. 3.

[0037] In one embodiment, the base 31 covers the cover plate 32 having the annular extension 321, so that the transition cavity 34 is located in a space surrounded by the annular extension 321, that is, the transition cavity 34 is located in the cover plate 32. Figure 3

[0038] In one embodiment, the base 31 covers the cover plate 32 having the annular extension 321, so that the transition cavity 34 is located in a space surrounded by the annular extension 321, that is, the transition cavity 34 is located in the cover plate 32.

[0039] ​​It can be understood that when the flow limiting hole 21 is arranged on the cover plate 32, the flow limiting hole 21 can be arranged on the cover plate 32 and the outlet end portion of the first pipe, or arranged on the cover plate 32 and the inlet end portion of the second pipe. By arranging the flow limiting hole 21 on the cover plate 32, the structure of the cover plate 32 is effectively utilized, the additional parts are reduced, and the production and processing are also facilitated, so that the structure of the steam generating device is simplified, and the production and processing cost is saved.

[0040] In an embodiment, the first joint 322 and the second joint 323 are integrally formed on the cover plate 32, which facilitates the production and processing, and facilitates the installation and disassembly of the first pipe 11, the second pipe 12 and the cover plate 32.

[0041] In an embodiment, as shown in Figure 8 The steam generating device includes a pressure storage member 200, the flow limiting hole 21 is arranged on the pressure storage member 200, the pressure storage member 200 is located in the inner cavity of the heating pipe 1, and the pressure storage channel 111 and the pressure release channel 121 are respectively located on both sides of the pressure storage member 200. The heating pipe 1 can be a single heating pipe 1, and the pressure storage member 200 is integrally formed or welded on the heating pipe 1. At this time, the pressure storage channel 111 includes a channel between the pressure storage member 200 and the inlet of the heating pipe 1, and the pressure release channel 121 includes a channel between the pressure storage member 200 and the outlet of the heating pipe 1. Of course, the number of heating pipes 1 can also be multiple, and multiple heating pipes 1 can be connected through the above-mentioned connecting part 3 or silica gel sleeve or welding.

[0042] In an embodiment, the heating pipe 1 has a heating film and a pipe body, the heating film is located on at least part of the outer surface of the pipe body, and the two end portions of the heating pipe 1 have electrodes 13, which are electrically connected with the heating film. The heating film includes a film material distributed with heating resistance wires and heat-conducting materials, and has the effect of lightweight and high-efficiency heating. Of course, the film material capable of heating in the existing conventional technology can also be selected.

[0043] In an embodiment, as shown in Figures 9-10 The steam generating device includes a housing 5, the housing 5 has a mounting cavity 51, at least part of the heating pipe 1 is located in the mounting cavity 51, the housing 5 has a mounting hole 52, the steam generating device has a temperature controller 6, at least part of the temperature controller 6 is located in the mounting hole 52, and the temperature controller 6 is assembled and fixed or limited with the housing 5.

[0044] On the one hand, the housing 5 protects the heating pipe 1, reducing the probability of damage to the heating pipe 1 due to bumps; on the other hand, the steam generating device can be conveniently installed at the required position through the housing 5. The heating pipe 1 can be partially located in the mounting cavity 51 of the housing 5, or the entire heating pipe 1 can be located in the mounting cavity 51 of the housing 5.

[0045] Further, the shell 5 is provided with a threaded hole, and the connecting part 3 is provided with a counterbore hole. A screw is passed through the counterbore hole and matched with the threaded hole, so that the shell 5 is fixedly installed with the connecting part 3.

[0046] The temperature controller 6 is used to detect the temperature of the heating tube 1 and can timely adjust the heating power of the heating film, so that the steam generating device can provide different heating powers required by different flow rates of fluid. The mounting hole 52 is used to install the temperature controller 6 on one hand, and on the other hand, reduces the isolation between the temperature controller 6 and the heating tube 1, so that the temperature controller 6 can more accurately detect the temperature of the heating tube 1 and can more accurately adjust the heating temperature.

[0047] In one embodiment, the flow area S corresponding to the flow limiting hole 21 satisfies: πmm 2 ≤S≤π2.5 2 mm 2 If the flow area of the flow limiting hole 21 is too large, the droplet diameter of the liquid flowing from the pressure storage channel 111 to the pressure release channel 121 is too large, which affects the vaporization efficiency. If the inner diameter of the flow limiting hole 21 is too small, it will affect the flow rate of the fluid, and affect the steam discharge flow rate of the steam generating device.

[0048] Further, the number of flow limiting holes 21 is two or more, and the flow area S corresponding to any one of the flow limiting holes 21 satisfies: S≤π2.5 2 mm 2 The two or more flow limiting holes 21 divide the fluid into multiple parallel branches. Compared with the case of only one flow limiting hole 21, although the pressure in the pressure storage channel 111 is reduced to a certain extent, the splashing effect of the fluid is reduced, but because the flow area S corresponding to any one of the flow limiting holes 21 is still small, the mass of the fluid in the unit heating area is small, and the liquid flowing through still has a good heating vaporization efficiency. While ensuring a certain fluid heating vaporization efficiency, the flow rate of the fluid is improved. When the flow area S corresponding to the flow limiting hole 21 satisfies: S≤π2.5 2 mm 2 , the size of the flow limiting hole 21 is further limited, so that the liquid flowing through the flow limiting hole 21 is finer, thereby reducing the mass of the fluid in the unit heating area and improving the vaporization efficiency of the liquid.

[0049] Of course, the flow limiting hole 21 can also be one. At this time, the pressure in the pressure storage channel 111 can be relatively large, so that the liquid can splash out of the flow limiting hole 21, and it is easier for the liquid to diffuse to the surrounding and form small droplets when entering the pressure release channel 121, thereby improving the vaporization efficiency of the liquid in the pressure release channel 121.

[0050] In another embodiment, the number of flow limiting holes 21 is one or two or more, and the total area A of the flow areas corresponding to all the flow limiting holes 21 satisfies: A≤π3.52 mm 2 That is, the total flow area of the plurality of flow limiting holes 21 is limited, thereby enabling the pressure storage channel 111 to maintain a certain pressure, enabling the liquid fluid to flow through the flow limiting hole 21 to be sprayed out, thereby more easily forming small droplets, and the vaporization efficiency in the pressure release channel 121 is more optimal.

[0051] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, obtains the technical scheme, concept and design by equivalent replacement or change, which should be covered in the protection scope of the present application.

Claims

1. A steam generating device, characterized by, The steam generating device comprises a heating tube (1), and at least part of the pressure accumulation channel (111) and the pressure release channel (121) are located in the heating tube (1). The flow limiting hole (21) is in communication with the pressure accumulation channel (111) and the pressure release channel (121), and the corresponding flow area of the flow limiting hole (21) is S, and S satisfies: S≤π3.5 2 mm 2 .

2. The steam generating device according to claim 1, characterized by The steam generating device comprises a connecting part (3), the heating pipe (1) comprises a first pipe (11) and a second pipe (12), the connecting part (3) connects the first pipe (11) and the second pipe (12), at least part of the pressure storage channel (111) is located in the first pipe (11), at least part of the pressure release channel (121) is located in the second pipe (12), and the flow limiting hole (21) is arranged on the connecting part (3).

3. The steam generating device according to claim 2, wherein The connecting part (3) comprises a cover plate (32), a first joint (322) in sealing connection with the first pipe (11), and a second joint (323) in sealing connection with the second pipe (12), the first joint (322) and the second joint (323) are connected with the cover plate (32), and the flow limiting hole (21) is arranged on the cover plate or the first joint (322) or the second joint (323).

4. The steam generating device according to claim 2 or 3, characterized in that, The connecting part (3) has a transition cavity (34) in communication with the flow limiting hole (21), and the transition cavity (34) is in communication with the flow limiting hole (21), the pressure storage channel (111) and the pressure release channel (121).

5. The steam generating device according to claim 4, wherein The connecting part (3) comprises a base (31) in sealing connection with the cover plate (32), at least part of the transition cavity (34) is located in the base (31) or the cover plate (32), one side of the cover plate (32) facing the base (31) has an annular extension (321), at least part of the transition cavity (34) is located in the annular extension (321), and the base (31) has an annular surrounding part (311) in sealing connection with the annular extension (321).

6. The steam generating device according to claim 3, wherein The connecting part (3) comprises a base (31) in sealing connection with a cover plate (32), and the first joint (322) and the second joint (323) are integrally formed on the cover plate (32).

7. The steam generating device according to claim 2, wherein The steam generating device comprises a pressure storage member (200), the connecting part (3) comprises a pressure storage part (2), the flow limiting hole (21) is arranged on the pressure storage part (2), the pressure storage member (200) is located in the inner cavity of the heating pipe (1), and the pressure storage channel (111) and the pressure release channel (121) are respectively located on two sides of the pressure storage member (200).

8. The steam generating device according to claim 1 or 2 or 3 or 5 or 6 or 7, characterized in that, The heating pipe (1) has a heating film and a pipe body, the heating film is located on at least part of the outer surface of the pipe body, and both ends of the heating pipe (1) have electrodes (13) in electrical connection with the heating film.

9. The steam generating device of claim 8, wherein, The steam generating device comprises a shell (5) having a mounting cavity (51), at least part of the heating pipe (1) is located in the mounting cavity (51), the shell (5) has a mounting hole (52), the steam generating device has a temperature controller (6), at least part of the temperature controller (6) is located in the mounting hole (52), and the temperature controller (6) is assembled and fixed or limited in position with the shell (5).

10. The steam generating device according to claim 1 or 2 or 3 or 5 or 6 or 7 or 9, characterized in that, The number of the flow-limiting holes (21) is one or two or more, and the flow area S corresponding to any one of the flow-limiting holes (21) satisfies: S≤π2.5 2 mm 2 ; Or, The number of the flow-limiting holes (21) is one or two or more, and the total area A of the flow areas corresponding to all the flow-limiting holes (21) satisfies: A≤π3.5 2 mm 2 .

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