A steam generating device

Abstract

The present invention discloses a steam generating device, comprising a shell, a heating tube and a cover plate, wherein a water inlet pipe and a steam outlet pipe are respectively arranged at two ends of the shell, a vaporization chamber and a Tesla valve chamber are arranged in the shell, the vaporization chamber is connected with the water inlet pipe, one end of the Tesla valve chamber is connected with the vaporization chamber, and the other end is connected with the steam outlet pipe; the heating tube is embedded in the shell and contacts with the vaporization chamber and the Tesla valve chamber respectively; the cover plate covers the vaporization chamber and the Tesla valve chamber; compared with the prior art, the steam generating device of the present invention not only directly utilizes the steam generating device to heat and vaporize water as a driving force, but also utilizes the Tesla valve chamber structure to promote unidirectional and accelerated flow of steam, the amount of steam ejected from the steam outlet pipe is more, and a stronger steam ejection effect is achieved; and the Tesla valve chamber has the characteristic that the forward flow resistance is much smaller than the reverse flow resistance, and can promote the unidirectional flow of steam in a specified direction, thereby ensuring that the steam can be ejected continuously without being intermittent.

Description

Technical Field

[0001] The present invention relates to the technical field of steam generators, and more particularly, to a steam generating device. Background Art

[0002] With the development of technology, people's living standards have been continuously improved, and the requirements for quality life are also getting higher and higher. In people's daily life, steam mops, clothes steamers, and cleaning machines are basic household items. The working principles of steam mops, clothes steamers, and cleaning machines are the same, that is, steam is generated by a steam generator, and then the steam is sprayed onto the working surface to heat and humidify the working surface, and then it is cleaned / ironed or cleaned. The existing steam generators of steam mops, clothes steamers, and cleaning machines all include a heating pot and a heating tube. The heating tube heats the water in the heating pot to turn the water into steam, and then sprays it onto the working surface. The steam generators with this structure rely on the pressure generated by the water turning into steam itself to eject the steam. Some steam will remain in the heating pot. When the steam is ejected from the heating pot, the steam volume fluctuates greatly, and the steam will be intermittent, resulting in poor ironing effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a steam generating device, which is used to solve the above technical problems.

[0004] A steam generating device includes:

[0005] A housing, with a water inlet pipe and a steam outlet pipe respectively provided at both ends of the housing. An evaporation chamber and a Tesla valve chamber are provided inside the housing. The evaporation chamber is communicated with the water inlet pipe. One end of the Tesla valve chamber is communicated with the evaporation chamber, and the other end is communicated with the steam outlet pipe;

[0006] A heating tube, which is embedded in the housing and is in contact with the evaporation chamber and the Tesla valve chamber respectively;

[0007] A cover plate, which covers the evaporation chamber and the Tesla valve chamber.

[0008] According to an embodiment of the present invention, a downward protrusion is provided on the cover plate, and the protrusion covers the Tesla valve chamber.

[0009] According to an embodiment of the present invention, a plurality of baffles are provided in the evaporation chamber. The baffles sequentially divide the evaporation chamber into a first evaporation chamber, a second evaporation chamber, a third evaporation chamber, and a fourth evaporation chamber; a notch for communicating adjacent evaporation chambers is provided on each of the plurality of baffles; the first evaporation chamber is communicated with the water inlet pipe; the fourth evaporation chamber is communicated with one end of the Tesla valve chamber.

[0010] According to an embodiment of the present invention, the heating tube is U-shaped.

[0011] According to an embodiment of the present invention, the heating tube is located at the bottom of the first evaporation chamber.

[0012] According to an embodiment of the present invention, the heating tube is located on both sides of the second vaporization chamber, the third vaporization chamber, and the fourth vaporization chamber.

[0013] According to an embodiment of the present invention, the heating tube is located on both sides of the Tesla valve chamber.

[0014] According to an embodiment of the present invention, the Tesla valve chamber is provided with a plurality of flow guiding blocks, and the plurality of flow guiding blocks divide the Tesla valve chamber into a plurality of flow guiding grooves. When the convex portion of the cover plate covers the Tesla valve chamber, it cooperates with the flow guiding grooves and the flow guiding blocks to form a Tesla valve.

[0015] According to an embodiment of the present invention, a slot is provided on the baffle plate located between the second vaporization chamber and the third vaporization chamber, and a plug board corresponding to the slot is provided on the cover plate. When the cover plate covers the housing, the plug board is inserted into the slot.

[0016] According to an embodiment of the present invention, a separation groove corresponding to the baffle plate is provided on the cover plate. When the cover plate covers the housing, the baffle plate is inserted into the separation groove.

[0017] Compared with the prior art, the steam generating device of the present invention has the following advantages:

[0018] The steam generating device of the present invention forms a Tesla valve structure by covering the Tesla valve chamber with a cover plate. It not only directly uses the steam generated by the steam generating device to heat and vaporize water as the driving force, but also uses the Tesla valve chamber structure to promote the unidirectional and accelerated flow of steam, resulting in a larger amount of steam ejected from the steam outlet pipe and achieving a stronger steam ejection effect. Moreover, the Tesla valve chamber has the characteristic that the forward flow resistance is much smaller than the reverse flow resistance, which can promote the unidirectional flow of steam in a specified direction, ensure continuous steam ejection without interruption, and effectively guarantee the ironing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the steam generating device of the present invention;

[0020] Figure 2 is an exploded view of the steam generating device of the present invention;

[0021] Figure 3 is Figure 2 a schematic structural diagram of the housing in

[0022] Figure 4 is Figure 2 a schematic structural diagram of the housing in another direction in

[0023] Figure 5 is Figure 2 a schematic structural diagram of the cover plate in

[0024] In the figure: 1. housing, 11. water inlet pipe, 12. steam outlet pipe, 13. first vaporization chamber, 14. second vaporization chamber, 15. third vaporization chamber, 16. fourth vaporization chamber, 17. baffle, 171. notch, 172. slot, 181. flow guide block, 182. flow guide groove, 19. sealing wall, 2. heating tube, 3. cover plate, 31. protrusion, 32. partition groove, 33. insertion plate, 34. sealing groove, 4. thermostat, 5. fuse, 6. sealing ring

[0025] The realization and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0026] The following will disclose multiple embodiments of the present invention with diagrams. For the sake of clear illustration, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence. Nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0029] To further understand the content, features and effects of the present invention, the following embodiments are exemplified and described in detail with the accompanying drawings as follows: Embodiment 1:

[0030] Please refer to Figures 1 to 5 as shown in Figures 1 to 5As shown in the figure, the steam generating device includes a housing 1, a heating tube 2, a cover plate 3, a thermostat 4 and a fuse 5. An evaporation chamber and a Tesla valve chamber are provided inside the housing 1. The evaporation chamber is communicated with a water inlet pipe 11. One end of the Tesla valve chamber is communicated with the evaporation chamber, and the other end is communicated with a steam outlet pipe 12. A downward convex portion 31 is provided on the cover plate 3. The convex portion 31 covers the Tesla valve chamber and forms a Tesla valve structure with the Tesla valve chamber. The heating tube 2 is embedded inside the housing 1 and is in contact with the evaporation chamber and the Tesla valve chamber respectively. The heating tube 2 is used to heat the water in the evaporation chamber, so that the water in the evaporation chamber is output to the steam outlet pipe 12 in the form of water vapor through the Tesla valve chamber. The thermostat 4 is provided on the housing 1 and is connected to the heating tube 2, and is used to control the working temperature of the heating tube 2. The contact of the thermostat 4 is in a normally closed state. When the temperature of the heating tube 2 reaches the working temperature, the thermostat 4 acts to open its contact and cut off the power supply of the heating tube 2. When the temperature of the heating tube 2 drops slightly, the contact of the thermostat 4 closes again, so that the heating tube 2 is powered on. Under the control of the thermostat 4, the working temperature of the heating tube 2 can be within a stable range. The fuse 5 is provided on the housing 1. The fuse 5 is connected in series with the heating tube 2. In the case where the thermostat 4 fails to cut off the power supply of the heating tube 2, the fuse 5 melts to cut off the power supply of the heating tube 2, which can prevent the heating tube 2 from being continuously dry-burned and burned out.

[0031] Please review Figures 1 to 3 , such as Figures 1 to 3 As shown in the figure, in this embodiment, a plurality of baffles 17 are provided in the evaporation chamber. Notches 171 are provided on each of the plurality of baffles 17. The plurality of baffles 17 divide the evaporation chamber into a first evaporation chamber 13, a second evaporation chamber 14, a third evaporation chamber 15 and a fourth evaporation chamber 16 that are sequentially communicated with each other. The first evaporation chamber 13 is communicated with the water inlet pipe 11. One end of the fourth evaporation chamber 16 is communicated with the Tesla valve chamber, and the other end of the Tesla valve chamber is communicated with the steam outlet pipe 12. The outside water enters the first evaporation chamber 13 through the water inlet pipe 11. The heating tube 2 heats the water in the first evaporation chamber 13. The water in the first evaporation chamber 13 turns into water vapor and enters the second evaporation chamber 14. After being continuously heated in the second evaporation chamber 14, it enters the third evaporation chamber 15. After being heated again in the third evaporation chamber 15, it enters the fourth evaporation chamber 16. The water vapor is heated layer by layer and continuously heated up. The temperature of the water vapor output from the fourth evaporation chamber 16 is higher than the temperature of the water vapor generated in the first evaporation chamber 13. The water vapor in the fourth evaporation chamber 16 enters the Tesla valve chamber through the air inlet of the Tesla valve chamber. After passing through the Tesla valve chamber, it is finally output through the steam outlet pipe 12. Due to the limitation of the Tesla valve structure, the steam in the fourth evaporation chamber 16 is accelerated by the Tesla valve chamber and output from the steam outlet pipe 12. The outside gas cannot enter the fourth evaporation chamber 16, and the water vapor entering the Tesla valve chamber cannot flow back to the fourth evaporation chamber 16.

[0032] In this embodiment, in order to reduce the size of the housing 1, the Tesla valve chamber is provided in the fourth vaporization chamber 16.

[0033] In this embodiment, the heating tube 2 is U-shaped, including a connecting portion and two parallel extending portions. The extending portions are connected to both sides of the connecting portion. The connecting portion of the heating tube 2 is located at the bottom of the first vaporization chamber 13, and the two extending portions of the heating tube 2 are located on both sides of the second vaporization chamber 14, the third vaporization chamber 15, the fourth vaporization chamber 16 and the Tesla valve chamber. The heating tube 2 heats the water in the first vaporization chamber 13, which can increase the generation speed of water vapor. The water vapor in the first vaporization chamber 13 sequentially passes through the second vaporization chamber 14, the third vaporization chamber 15 and the fourth vaporization chamber 16 and is heated, and finally enters the Tesla valve chamber, where it is heated again during the transportation in the Tesla valve chamber, which can increase the output speed and temperature of the water vapor.

[0034] Please review Figure 3 , as Figure 3 shown, in this embodiment, the Tesla valve chamber is provided with a number of flow guiding blocks 181. The number of flow guiding blocks 181 divides the Tesla valve chamber into a number of flow guiding grooves 182. When the convex portion 31 of the cover plate 3 covers the Tesla valve chamber, it cooperates with the flow guiding blocks 181 and the flow guiding grooves 182 to form a Tesla valve. Not only directly uses the steam generating device to heat and vaporize water as the driving force, but also uses the Tesla valve chamber structure to promote the unidirectional and accelerated flow of steam, so that more steam is ejected from the steam outlet pipe 12, achieving a stronger steam ejection effect; moreover, the Tesla valve chamber has the characteristic that the forward flow resistance is much smaller than the reverse flow resistance, which can promote the steam to flow unidirectionally in the specified direction, ensuring continuous steam ejection without interruption.

[0035] Please review Figure 3 , as Figure 3 shown, in this embodiment, taking the center line of the Tesla valve chamber as the axis, the flow guiding blocks 181 and the flow guiding grooves 182 are divided into a first part and a second part. The included angle between the flow guiding blocks 181 and the flow guiding grooves 182 of the first part and the center line of the Tesla valve chamber is 15 degrees, and the included angle between the flow guiding blocks 181 and the flow guiding grooves 182 of the second part and the center line of the Tesla valve chamber is -15 degrees.

[0036] Please review Figure 3 , as Figure 3 shown, in this embodiment, inclined surfaces are provided at one ends of the flow guiding blocks 181 close to the steam outlet pipe 12. The inclined surfaces are located on the side of the flow guiding blocks 181 away from the flow guiding grooves 182 and are inclined towards the air inlet direction of the Tesla valve structure.

[0037] In this embodiment, the cover plate 3 is provided with a partition groove 32 corresponding to the baffle 17. When the cover plate 3 covers the housing 1, the baffle 17 is inserted into the partition groove 32.

[0038] Please review Figure 3and Figure 5 such as Figure 3 and Figure 5 As shown, in this embodiment, a slot 172 is provided on the baffle 17 between the second vaporization chamber 14 and the third vaporization chamber 15, and a plug 33 corresponding to the slot 172 is provided on the cover plate 3. When the cover plate 3 covers the housing 1, the plug 33 is inserted into the slot 172, which can make the connection between the housing 1 and the cover plate 3 more firm.

[0039] Please review Figure 2 、 Figure 3 and Figure 5 such as Figure 2 、 Figure 3 and Figure 5 As shown, a sealing wall 19 is provided on the housing 1, and the sealing wall 19 surrounds the first vaporization chamber 13, the second vaporization chamber 14, the third vaporization chamber 15, and the fourth vaporization chamber 16. A sealing groove 34 corresponding to the sealing wall 19 is provided on the cover plate. When the cover plate 3 covers the housing 1, the sealing wall 19 is connected to the sealing groove 34.

[0040] Please review Figure 2 、 Figure 3 and Figure 5 such as Figure 2 、 Figure 3 and Figure 5 As shown, in order to seal the connection between the cover plate 3 and the housing 1, a sealing ring 6 is provided in the sealing groove 34. When the cover plate 3 covers the housing 1, the sealing wall 19 is inserted into the sealing groove 34 and tightly pressed against the sealing ring 6, which can prevent steam leakage.

[0041] Please review Figure 4 such as Figure 4 As shown, in this embodiment, an installation groove is provided on the lower surface of the housing 1, and the shape of the installation groove is adapted to the shape of the thermostat 4. The thermostat 4 is installed in the installation groove. The installation groove is formed by a depression on the lower surface of the housing 1. When the thermostat 4 is installed in the installation groove, the thermostat 4 is closer to the heating tube 2, which can better monitor the working temperature of the heating tube 2 and avoid dry burning of the heating tube 2.

[0042] Please review Figure 4 In this embodiment, a card slot is provided on the lower surface of the housing 1, and the shape of the card slot is adapted to the shape of the fuse 5. The fuse 5 is installed in the card slot.

[0043] For the steam generating device of this embodiment, during use, water is added into the first vaporization chamber 13 from the water inlet pipe 11. The water is heated by the heating tube 2 in the first vaporization chamber 13. The part that turns into water vapor enters the second vaporization chamber 14, is heated in the second vaporization chamber 14 and then enters the third vaporization chamber 15, and is heated again in the third vaporization chamber 15 and enters the fourth vaporization chamber 16. Since a Tesla valve chamber is provided in the fourth vaporization chamber 16, the water vapor is heated in the fourth vaporization chamber 16 and enters the Tesla valve chamber from the air inlet of the Tesla valve chamber, and flows towards the air outlet of the Tesla valve chamber in the flow guide groove 182. The water vapor is accelerated during the flow in the Tesla valve chamber and finally enters the steam outlet pipe 12 from the air outlet of the Tesla valve chamber and is ejected. Embodiment 2:

[0044] The structure and function of this embodiment are the same as those of Embodiment 1. The difference is that in this embodiment, the included angle between the flow guide block 181 and the flow guide groove 182 of the second part and the center line of the Tesla valve chamber is 10 degrees, and the included angle between the flow guide block 181 and the flow guide groove 182 of the second part and the center line of the Tesla valve chamber is -10 degrees. Embodiment 3:

[0045] The structure and function of this embodiment are the same as those of Embodiment 1. The difference is that in this embodiment, the included angle between the flow guide block 181 and the flow guide groove 182 of the second part and the center line of the Tesla valve chamber is 25 degrees, and the included angle between the flow guide block 181 and the flow guide groove 182 of the second part and the center line of the Tesla valve chamber is -25 degrees.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam generating device, characterized in that, it comprises: a housing (1), with a water inlet pipe (11) and a steam outlet pipe (12) respectively provided at two ends of the housing (1), a vaporization chamber and a Tesla valve chamber are provided inside the housing (1), the vaporization chamber is communicated with the water inlet pipe (11), one end of the Tesla valve chamber is communicated with the vaporization chamber, and the other end is communicated with the steam outlet pipe (12); a heating pipe (2), which is embedded in the housing (1) and is in contact with the vaporization chamber and the Tesla valve chamber respectively; a cover plate (3), which covers the vaporization chamber and the Tesla valve chamber.

2. The steam generating device according to claim 1, characterized in that, a downward protruding portion (31) is provided on the cover plate (3), and the protruding portion (31) covers the Tesla valve chamber.

3. The steam generating device according to claim 1, characterized in that, a plurality of baffles (17) are provided in the vaporization chamber, and the baffles (17) sequentially divide the vaporization chamber into a first vaporization chamber (13), a second vaporization chamber (14), a third vaporization chamber (15) and a fourth vaporization chamber (16); a notch (171) for communicating adjacent vaporization chambers is provided on each of the plurality of baffles (17); the first vaporization chamber (13) is communicated with the water inlet pipe (11); the fourth vaporization chamber (16) is communicated with one end of the Tesla valve chamber.

4. The steam generating device according to claim 1, characterized in that, the heating pipe (2) is U-shaped.

5. The steam generating device according to claim 1, characterized in that, the heating pipe (2) is located at the bottom of the first vaporization chamber (13).

6. The steam generating device according to claim 1, characterized in that, the heating pipe (2) is located on both sides of the second vaporization chamber (14), the third vaporization chamber (15) and the fourth vaporization chamber (16).

7. The steam generating device according to claim 1, characterized in that, the heating pipe (2) is located on both sides of the Tesla valve chamber.

8. The steam generating device according to claim 1, characterized in that, a plurality of flow guiding blocks (181) are provided in the Tesla valve chamber, and the plurality of flow guiding blocks (181) divide the Tesla valve chamber into a plurality of flow guiding grooves (182), and when the protruding portion (31) of the cover plate (3) covers the Tesla valve chamber, it cooperates with the flow guiding blocks (181) and the flow guiding grooves (182) to form a Tesla valve.

9. The steam generating device according to claim 3, characterized in that, a slot (172) is provided on the baffle (17) located between the second vaporization chamber (14) and the third vaporization chamber (15), a plug board (33) corresponding to the slot (172) is provided on the cover plate (3), and when the cover plate (3) covers the housing (1), the plug board (33) is inserted into the slot (172).

10. The steam generating device according to claim 3, characterized in that, The cover plate (3) is provided with a partition groove (32) corresponding to the baffle plate (17). When the cover plate (3) covers the housing (1), the baffle plate (17) is inserted into the partition groove (32).

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