A multi-layer heating device and a household appliance

Abstract

The utility model relates to heating module technical field discloses a kind of multilayer heating device and household appliance, including first chamber and heating piece, second chamber further including, second chamber is located in the side of heating piece, deviating first chamber, second chamber is communicated with first chamber, water inlet is opened on first chamber, gas outlet is opened on second chamber, water body flows through first chamber and second chamber in turn through water inlet, and it flows out from gas outlet after heating by heating piece, the utility model is arranged in the two sides of heating piece by first chamber and second chamber respectively, and surface contact with heating piece is sufficiently increased, so that the heat of heating piece can be transmitted to two side chambers simultaneously, improve the heat utilization of heating piece, the transmission speed of heat to water body is greatly accelerated by double-side heat transfer design, can quickly meet the demand of a large amount of steam for scene such as steam box, steam mop etc., the length of water channel is lengthened by two chamber communication, so that the output steam or hot water is more stable.

Description

Technical Field

[0001] This utility model relates to the field of heating module technology, and in particular to a multi-layer heating device and a household appliance. Background Technology

[0002] Currently, most heating devices used in household appliances are heating elements, stainless steel tubes and aluminum materials that are integrally molded, or stainless steel tubes with printed heating resistance on the outer wall. These three types of structures are not only expensive, but also bulky or prone to damage when dry-burning.

[0003] After thorough searching, the applicant found that the "Steam Generator and Household Appliance" proposed in Chinese Patent Publication No. CN216113974U forms a chamber between a first side plate and a second side plate. The first side plate has a protrusion extending towards the second side plate, which abuts against the second side plate to form a water channel for water flow within the chamber. It also includes a heat spreader and a heating pipe, with the heating pipe disposed on the side of the second side plate facing away from the first side plate via the heat spreader. This device has the following drawbacks: The heating pipe in this device only heats the chamber from one side. 1. Low heating efficiency: The heating tube heats the chamber on only one side, and the heat transfer to the water in the chamber is slow, resulting in low overall heating efficiency. This may not meet the needs, especially in scenarios where a large amount of steam needs to be generated quickly. 2. Low heat utilization rate: When the heating tube is working, the entire tube generates heat, but in actual use, only the heat on the side facing the chamber is utilized, while the heat on the other side is lost, resulting in a reduced heat utilization rate. 3. Traditional heating devices have only one chamber, resulting in a short water flow path and a short residence time of the water within the chamber. This leads to insufficient heat absorption, causing unstable steam output and large fluctuations in water levels. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer heating device and household appliance to solve the problems in the prior art, which can not only improve heating efficiency, but also improve heat utilization.

[0005] This utility model provides a multi-layer heating device, including a first chamber and a heating element. The first chamber is located on one side of the heating element and forms a water channel for water flow. The device also includes a second chamber located on the side of the heating element opposite to the first chamber and communicating with the first chamber. The first chamber has a water inlet and the second chamber has an air outlet. Water flows through the water inlet sequentially through the first chamber and the second chamber, and after being heated by the heating element, it flows out from the air outlet.

[0006] In the multi-layer heating device described above, preferably, the multi-layer heating device includes a first cover plate and a first heat-conducting plate, the first cover plate is provided with a continuously curved first protrusion, the first heat-conducting plate is attached to the opposite side of the first cover plate relative to the first protrusion, the first chamber is formed between the first cover plate and the first heat-conducting plate, and the first heat-conducting plate is attached to the heating element.

[0007] In the multi-layer heating device described above, preferably, the multi-layer heating device includes a second cover plate and a second heat-conducting plate, the second cover plate is provided with a continuously curved second protrusion, the second heat-conducting plate is attached to the opposite side of the second cover plate relative to the second protrusion, the second chamber is formed between the second cover plate and the second heat-conducting plate, and the second heat-conducting plate is attached to the heating element.

[0008] In the multi-layer heating device described above, preferably, the heating element is arranged in a curved shape, and the two ends of the heating element enclose a receiving space, and either the first heat-conducting plate or the second heat-conducting plate is provided with a third protrusion extending into the receiving space.

[0009] In the multi-layer heating device described above, preferably, the first chamber has a first channel extending to the second chamber at the end of the water flow path, and the second chamber has a second channel extending to the first chamber at a position corresponding to the first channel, and the first channel and the second channel are connected.

[0010] In the multi-layer heating device described above, preferably, the air outlet includes at least one air outlet hole, and the air outlet hole is located on the side of the second cover plate away from the heating element.

[0011] In the multilayer heating device described above, preferably, the edge of the second heat-conducting plate extends along the protruding direction of the second protrusion and forms an edge portion.

[0012] In the multi-layer heating device described above, preferably, the second heat-conducting plate is covered with an outer cover, and the outer cover has multiple through holes.

[0013] This utility model also provides a household appliance that uses the above-mentioned heating device.

[0014] The household appliance described above is preferably one of a garment steamer, an electric iron, a steam mop, a steam wallpapering machine, a dishwasher, and a washing machine.

[0015] Compared with the prior art, this utility model arranges the first chamber and the second chamber on both sides of the heating element, which fully increases the surface contact with the heating element. This allows the heat from the heating element to be transferred to both chambers simultaneously, solving the defect of traditional single-sided heating where only one side of the heat is utilized and the other side is lost. This improves the heat utilization rate of the heating element, enhances heating performance, and reduces energy waste. Secondly, the double-sided heat transfer design significantly accelerates the heat transfer speed to the water, which can quickly meet the demand for large amounts of steam in scenarios such as steam ovens and steam mops, solving the problem of insufficient efficiency of single-sided heating. The connection between the two chambers extends the length of the water channel and prolongs the heating time of the water, making the output steam or hot water more stable. Attached Figure Description

[0016] Figure 1 This is a top view of the multi-layer heating device provided in Embodiment 1 of this utility model; Figure 2 This is a bottom view of the multi-layer heating device provided in Embodiment 1 of this utility model; Figure 3 yes Figure 1 Sectional view at point AA; Figure 4 This is a top view of the multi-layer heating device with an edge provided in Embodiment 1 of this utility model; Figure 5 yes Figure 4 Sectional view at point BB in the middle; Figure 6 This is a bottom view of a multi-layer heating device with multiple air vents provided in Embodiment 1 of this utility model; Figure 7 yes Figure 6 Exploded view; Figure 8 This is a bottom view of a multi-layer heating device with a shell provided in Embodiment 1 of this utility model; Figure 9 yes Figure 8 A sectional view; Figure 10 This is a cross-sectional view of the multi-layer heating device provided in Embodiment 2 of this utility model; Figure 11 This is an exploded view of the multi-layer heating device provided in Embodiment 2 of this utility model.

[0017] Explanation of reference numerals in the attached figures: 10. First chamber; 11. Water inlet; 12. First cover plate; 120. First protrusion; 13. First heat-conducting plate; 130. Third protrusion; 14. First channel; 140. First flipping part; 15. Limiting post; 16. Limiting hole; 20. Heating element; 21. Accommodation space; 30. Second chamber; 31. Second cover plate; 310. Second protrusion; 32. Second heat-conducting plate; 320. Edge; 33. Second channel; 330. Second flipping part; 34. Vent; 35. Limiting part; 40. Outer cover; 41. Through hole. Detailed Implementation

[0018] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] Example 1 See Figure 1-7 As shown, this embodiment provides a multi-layer heating device, including a first chamber 10 and a heating element 20. The first chamber 10 is located on one side of the heating element 20, and a water channel for water flow is formed within the first chamber 10. It also includes a second chamber 30, located on the side of the heating element 20 opposite to the first chamber 10, and connected to the first chamber 10. The first chamber 10 has a water inlet 11, and the second chamber 30 has a steam outlet. Water flows through the water inlet 11 sequentially through the first chamber 10 and the second chamber 30, and after being heated by the heating element 20, flows out through the steam outlet. In the embodiment provided in this application, the heating element 20 corresponds to the first chamber 10 and the second chamber 30 on both sides, respectively. The heat generated during its operation can be conducted to both chambers simultaneously, significantly improving heat utilization. The connection between the first chamber 10 and the second chamber 30 increases the water flow path, allowing for more thorough heating of the water, faster water temperature rise, and ensuring stable output steam temperature, thus improving temperature uniformity. Furthermore, in traditional single-sided chambers, the heating element 20 only heats one side of the chamber after heating stops, making it difficult to completely evaporate the residual water, which easily produces water droplets and affects the performance. However, this embodiment increases the length of the water channel and ensures full contact between the chamber and the heating element 20, so that the residual water can be completely evaporated by the residual heat after the machine stops. This ensures that there is no liquid water residue in the chamber when the machine is restarted, significantly improving the user experience.

[0020] See Figure 1 , Figure 3 and Figure 5As shown, in this embodiment, the multi-layer heating device includes a first cover plate 12 and a first heat-conducting plate 13. The first cover plate 12 has a continuously curved first protrusion 120. The first heat-conducting plate 13 is attached to the opposite side of the first cover plate 12 relative to the first protrusion 120. A first chamber 10 is formed between the first cover plate 12 and the first heat-conducting plate 13. The first heat-conducting plate 13 is attached to the heating element 20. The continuously curved first protrusion 120 forms a meandering waterway in the first chamber 10, increasing the flow path of the water. The heating element 20 transfers heat to the first heat-conducting plate 13, and the water has more time to absorb heat, improving heat exchange efficiency. The first heat-conducting plate 13 can have a structure with both sides being flat, which can increase the contact area with the heating element 20 when it is attached to it, reducing thermal resistance loss.

[0021] See Figure 3 , Figure 5 and Figure 7 As shown, in one feasible embodiment, in order to make the first heat-conducting plate 13 and the first cover plate 12 fit tightly together, a plurality of limiting posts 15 are provided at intervals on the first heat-conducting plate 13, and corresponding limiting holes 16 are opened on the first cover plate 12. The first heat-conducting plate 13 and the second heat-conducting plate 32 are pre-limited by the cooperation of the limiting posts 15 and the limiting holes 16. Then, the part of the limiting posts 15 that protrudes from the limiting holes 16 is deformed by stamping and tightly fitted with the limiting holes 16. The contact area between the first cover plate 12 and the first heat-conducting plate 13 is coated with welding paste and fixed together by welding furnace to improve the sealing effect of the first chamber 10.

[0022] See Figure 2-3 and Figure 7As shown, in this embodiment, the multi-layer heating device includes a second cover plate 31 and a second heat-conducting plate 32. The second cover plate 31 has a continuously curved second protrusion 310. The second heat-conducting plate 32 is attached to the opposite side of the second cover plate 31 relative to the second protrusion 310. A second chamber 30 is formed between the second cover plate 31 and the second heat-conducting plate 32. The second heat-conducting plate 32 is attached to the heating element 20. The second protrusion 310 also forms a continuously curved path, which, after being connected in series with the curved water channel of the first chamber 10, increases the water flow path. After being heated by the heating element 20, the water in the first chamber 10 and the second chamber 30 is fully evaporated into steam. The second heat-conducting plate 32 is attached to the heating element 20, increasing the contact area between the entire water flow channel and the heating element 20. The second cover plate 31 and the second heat-conducting plate 32 are pre-limited by limiting posts 15 and limiting holes 16, and then tightly fitted by stamping. Finally, welding paste is applied and the plates are welded together for fixation. The heating element 20 is limited to a preset position between the first heat-conducting plate 13 and the second heat-conducting plate 32. It can be fixed to the two as a whole by welding or other means, or multiple protruding limiting parts 35 are respectively provided on the opposite surfaces of the first heat-conducting plate 13 and the second heat-conducting plate 32. The multiple limiting parts 35 limit the heating element 20 along the circumference, thereby limiting the heating element 20 between the first heat-conducting plate 13 and the second heat-conducting plate 32.

[0023] See Figure 3 and Figure 7As shown, in order to achieve communication between the first chamber 10 and the second chamber 30, in this embodiment, the first chamber 10 has a first channel 14 extending to the second chamber 30 at the end of the water flow path, and the second chamber 30 has a second channel 33 extending to the first chamber 10 at the corresponding position of the first channel 14. The first channel 14 and the second channel 33 are connected. Connecting the end of the first chamber 10 and the beginning of the second chamber 30 allows the water to flow through both chambers throughout its entire path, avoiding heating dead zones, improving heating uniformity, and reducing energy and space waste. A first rotating part 140 is provided at the end position of the first heat-conducting plate 13 corresponding to the first protrusion 120, and a first channel 14 is formed within the first rotating part 140. A second rotating part 330 is provided at the beginning position of the second protrusion 310 corresponding to the second heat-conducting plate 32, and a second channel 33 is formed within the second rotating part 330. The first rotating part 140 is fitted inside the second rotating part 330 and sealed, so that the first chamber 10 and the second chamber 30 are connected. When cold water flows into the first chamber 10 and the second chamber 30 through the inlet 11, the heating element 20 has already uniformly conducted heat to the first heat-conducting plate 13 and the second heat-conducting plate 32. That is, the cold water is in a uniform and continuous heating state from inflow to outflow. The connection structure between the upper and lower chambers allows the cold water to heat up quickly to reach the temperature required by the user. In this way, a low-cost heating device is realized through simple spatial layout and structural cooperation. This device can realize the dual function of heating cold water and turning cold water into steam. In another embodiment, through holes can be opened in the first chamber 10 and the second chamber 30 respectively, and a connecting pipe or connector can be inserted into the two through holes to allow the fluid in the first chamber 10 to flow to the second chamber 30.

[0024] See Figure 2 and Figure 6 As shown, in some embodiments of this application, cold water enters the first chamber 10 through the inlet 11, and after being heated, it becomes hot water or steam and flows out through the outlet. Therefore, in this embodiment, the outlet includes at least one vent 34, and the vent 34 is located on the side of the second cover plate 31 opposite to the heating element 20. When only one vent 34 is provided, it is preferably located at the end of the second chamber 30. Cold water flows in through the inlet 11, is heated to form steam, and then flows out through the vent 34. In another embodiment, multiple vents 34 can also be provided, allowing steam to flow out from multiple vents 34, thereby providing a large amount of steam.

[0025] It should be noted that, see Figure 5-7As shown, the two ends of the second chamber 30 can be open or sealed. For example, in some cases, in order to make the steam spray coverage area more comprehensive, at least one end of the second chamber 30 is set to be open. The second heat-conducting plate 32 can protrude a receiving chamber towards the side of the heating element 20. The second cover plate 31 is disposed in the receiving chamber. There is a certain gap between the second protrusion 310 and the second heat-conducting plate 32, which can also be used for steam discharge. The specific structure is not limited here.

[0026] See Figure 5 As shown, in some embodiments of this application, the edge of the second heat-conducting plate 32 extends along the protruding direction of the second protrusion 310 and forms an edge portion 320. See also Figure 4-7 As shown, the shape of the second heat-conducting plate 32 is not limited, but it can be designed to resemble the shape of an iron in order to adapt to ironing appliances. Its edge 320 can be used for assembly and positioning to avoid exposing high-temperature components, isolate the heating components from the external structure, and reduce the risk of burns.

[0027] See Figure 8-9 As shown, the second heat-conducting plate 32 is further provided with an outer cover 40, on which multiple through holes 41 are opened. The outer cover 40 can be assembled onto the edge 320 to achieve a tight fit between the outer cover 40 and the second heat-conducting plate 32. Steam flows out from the multiple through holes 41, while heat is transferred to the outer cover 40 through the second heat-conducting plate 32, thereby providing a large amount of steam, which is especially suitable for the ironing function of a garment steamer.

[0028] Example 2 See Figure 10-11 As shown, the difference from Embodiment 1 is that the heating element 20 in Embodiment 2 is arranged in a curved shape, and the two ends of the heating element 20 enclose a receiving space 21. Either the first heat-conducting plate 13 or the second heat-conducting plate 32 is provided with a third protrusion 130 extending into the receiving space 21. The heating element 20 is a heating tube with an aluminum alloy shell, which can be bent into a U-shape or a C-shape, and its cross-section is trapezoidal or square. This facilitates maximum contact area between the first heat-conducting plate 13 and the second heat-conducting plate 32 and the heating element 20 and conducts heat. The third protrusion 130 extending into the receiving space 21 formed after the heating tube is bent can further increase the contact area with the heating element 20 and improve the heat utilization rate. The third protrusion 130 can be a continuous and curved shape, or multiple third protrusions 130 arranged side by side depending on the size of the accommodating space 21. It should be noted that there is no limitation on whether the third protrusion 130 is located on the first heat-conducting plate 13 or the second heat-conducting plate 32, but it must be ensured that the cavity formed by the third protrusion 130 is connected to the first cavity 10 or the second cavity 30. The specific layout can be arranged according to the needs of different devices.

[0029] A household appliance is provided with the aforementioned heating device. This household appliance includes, but is not limited to, any one of a garment steamer, electric iron, steam mop, steam wallpapering machine, dishwasher, and washing machine. In this appliance, the heating device is placed inside the appliance's housing and mounted thereto; the mounting structure is not limited, and the hot water or steam required by the appliance is provided through the heating device.

[0030] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A multi-layer heating device, characterized in that, The device includes a first chamber and a heating element. The first chamber is located on one side of the heating element and forms a water channel for water flow. It also includes a second chamber located on the side of the heating element opposite to the first chamber and communicates with the first chamber. The first chamber has a water inlet and the second chamber has an air outlet. Water flows through the water inlet sequentially through the first chamber and the second chamber, and after being heated by the heating element, it flows out from the air outlet.

2. The multi-layer heating device according to claim 1, characterized in that, The multi-layer heating device includes a first cover plate and a first heat-conducting plate. The first cover plate has a continuously curved first protrusion. The first heat-conducting plate is attached to the opposite side of the first cover plate relative to the first protrusion. The first chamber is formed between the first cover plate and the first heat-conducting plate. The first heat-conducting plate is attached to the heating element.

3. The multi-layer heating device according to claim 1, characterized in that, The multi-layer heating device includes a second cover plate and a second heat-conducting plate. The second cover plate has a continuously curved second protrusion. The second heat-conducting plate is attached to the opposite side of the second cover plate relative to the second protrusion. The second chamber is formed between the second cover plate and the second heat-conducting plate. The second heat-conducting plate is attached to the heating element.

4. The multi-layer heating device according to claim 2, characterized in that, The heating element is arranged in a curved shape, and the two ends of the heating element enclose a receiving space. Either the first heat-conducting plate or the second heat-conducting plate is provided with a third protrusion extending into the receiving space.

5. The multi-layer heating device according to claim 1, characterized in that, The first chamber has a first channel extending to the second chamber at the end of the water flow path, and the second chamber has a second channel extending to the first chamber at the position corresponding to the first channel. The first channel and the second channel are connected.

6. The multi-layer heating device according to claim 3, characterized in that, The air outlet includes at least one air vent, and the air vent is located on the side of the second cover plate away from the heating element.

7. The multi-layer heating device according to claim 3, characterized in that, The edge of the second heat-conducting plate extends along the protruding direction of the second protrusion and forms an edge portion.

8. The multi-layer heating device according to claim 3, characterized in that, The second heat-conducting plate is covered with an outer cover, and the outer cover has multiple through holes.

9. A household appliance, characterized in that, The household appliance is equipped with a heating device as described in any one of claims 1-8.

10. The household appliance according to claim 9, characterized in that, The household appliance is any one of the following: garment steamer, electric iron, steam mop, steam wallpapering machine, dishwasher, and washing machine.

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