Instant heating module and household appliance

Abstract

The utility model discloses an instant heating module and a household appliance, and relates to the technical field of heating devices. The heating device specifically comprises a cover plate, a heat conducting plate and a heating piece, and the cover plate is provided with a continuous convex rib; the heat-conducting plate comprises a separation part and a heat-conducting part, the separation part is arranged on the open surface of the convex rib to define a closed fluid passage, and the heat-conducting part is arranged on one side, far away from the fluid passage, of the separation part; heat generated by the heating piece is transferred to the fluid passage; gaps are formed between the side edges of the heat conduction plate and the turnups on the corresponding sides, and the thermal expansion coefficient of the heat conduction part is larger than that of the cover plate. A gap exists between the heat conducting plate and the turnup, the heat conducting plate expands due to too high temperature during welding, the gap can fully reserve a space for the heat conducting plate to expand, the situation that the turnup deforms due to extrusion between the heat conducting plate and the turnup due to expansion is avoided, meanwhile, the situation that the turnup is pressed to be bent, and the heat conducting plate and the cover plate are not tightly attached is avoided, and welding quality is improved. The welding quality is influenced.

Description

Technical Field

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

[0002] An instant heating module is a technology module that can rapidly heat water or other liquids to the required temperature, converting electrical energy into heat energy to achieve instantaneous heating of the liquid. In the field of home appliances, instant heating modules are widely used in products such as instant hot water faucets, instant hot water dispensers, and instant hot water dishwashers to provide a rapid supply of hot water; in the industrial and medical fields, instant heating technology is also used to rapidly heat fluids or sterilize surgical instruments.

[0003] Currently, instant heating modules use a cover plate and a heat-conducting plate to form a continuous flow channel, and heat is supplied to the flow channel through a heating pipe on one side of the heat-conducting plate, thereby raising the temperature of the water flowing through the instant heating module. However, during the production of this instant heating module, the cover plate and the heat-conducting plate are fixed by brazing to ensure a sealing effect. Therefore, the cover plate and the heat-conducting plate are made of different materials, which makes it easy for the heat-conducting plate to expand and deform due to excessive temperature. In the patent already applied for by the applicant, in order to resist the deformation of the heat-conducting plate due to brazing, the applicant uses a cover plate with a flange around the heat-conducting plate, so that the flange can prevent the heat-conducting plate from deforming due to high temperature and reduce the impact of the heat-conducting plate deformation caused by brazing.

[0004] After researching the product, the applicant found that some problems still existed in the production of the instant-heating module using the above-mentioned solution. During brazing between the heat-conducting plate and the cover plate, the heat-conducting plate expanded and deformed due to excessive temperature. This caused the edges of the heat-conducting plate to press against the flanges of the cover plate. This pressing action between the heat-conducting plate and the cover plate flanges was prone to misalignment, affecting both the flange structure around the cover plate and the tightness of the brazing between the cover plate and the heat-conducting plate. This also affected the sealing effect of the flow channel between the cover plate and the heat-conducting plate, reducing the quality of the instant-heating module product.

[0005] Therefore, this application aims to prevent the heat-conducting plate from being squeezed by the flanges around the cover plate due to the expansion of the brazing, while improving the sealing of the brazing between the cover plate and the heat-conducting plate. Utility Model Content

[0006] The main purpose of this invention is to provide a way to avoid the heat-conducting plate being squeezed against the cover plate due to the expansion of the brazing, while improving the sealing of the brazing between the cover plate and the heat-conducting plate.

[0007] To achieve the above objectives, this utility model proposes an instant heating module, comprising:

[0008] The cover plate has a continuous raised rib;

[0009] A heat-conducting plate includes a partition and a heat-conducting portion. The partition is disposed on the open side of the rib to define a closed fluid passage. The heat-conducting portion is disposed on the side of the partition away from the fluid passage. The partition and the heat-conducting portion are welded to the cover plate.

[0010] A heating element is provided on the heat-conducting part, and the heat generated therefrom is transferred to the fluid passage;

[0011] The cover plate has a flange on the side facing the partition, and there is a gap between the side of the heat-conducting part and the flange on the corresponding side. The thermal expansion coefficient of the heat-conducting part is greater than that of the cover plate.

[0012] Furthermore, the width of the gap is 0.5-10mm.

[0013] Furthermore, mounting holes are evenly provided along the edge of the cover plate.

[0014] Furthermore, the edge of the heat-conducting plate is provided with a notch for reserving the mounting hole.

[0015] Furthermore, the heat-conducting part includes a heat transfer plate, the partition part includes at least one intermediate plate, the intermediate plate covers the open surface of the rib, the heating element is installed on the side of the heat transfer plate away from the intermediate plate, and the coefficient of thermal expansion of the heat transfer plate is greater than the coefficient of thermal expansion of the intermediate plate.

[0016] Furthermore, the partition portion is provided with a positioning structure on the side facing the heat-conducting portion, the positioning structure being used to define the position of the heat-conducting portion.

[0017] Furthermore, the positioning structure includes a protrusion provided on the side of the partition facing the heat-conducting part, the protrusion being inserted into the heat-conducting part.

[0018] Furthermore, the positioning structure includes at least one clamping block disposed on the opposite side of the heat-conducting part, the clamping block being fixed on the partition and pressing or fitting against the edge of the heat-conducting part.

[0019] Furthermore, a fluid inlet and a fluid outlet are respectively provided at both ends of the fluid passage.

[0020] Furthermore, a fluid inlet and a fluid outlet are respectively provided at both ends of the fluid passage.

[0021] This application also discloses applications of the household appliance such as the aforementioned instant heating module in water dispensers, garment steamers, electric irons, steam mops, steam wallpapering machines, dishwashers, or washing machines.

[0022] The above technical solution has the following advantages:

[0023] This invention features flanges around the cover plate, which limit the heat-conducting plate. A gap exists between the heat-conducting plate and the flanges, providing space for the heat-conducting plate to expand. When the cover plate and the heat-conducting plate are welded, the heat-conducting plate expands due to high temperature. The gap provides sufficient space for the heat-conducting plate to expand, thus preventing the heat-conducting plate from being squeezed by the flanges due to expansion, which could cause the flanges to deform. It also prevents the flanges from bending under pressure, which could result in a loose fit between the heat-conducting plate and the cover plate, affecting the brazing quality and further improving the sealing performance of the brazing between the cover plate and the heat-conducting plate.

[0024] The notches at the mounting holes around the cover plate of the heat-conducting plate provide space for installation, facilitating the insertion and removal of bolts, screws, or pins. This aids in product installation while preventing the heat-conducting plate from transferring heat to the bolts, screws, or pins at the mounting holes, thus preventing them from expanding due to heat and affecting the stability of the instant heating module within the product. Attached Figure Description

[0025] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the exploded structure of this utility model.

[0027] Figure 2 This is a front view of the structure of the heat-conducting plate of this utility model.

[0028] In the diagram: 10, cover plate; 20, rib; 30, heat-conducting plate; 301, heat transfer plate; 302, intermediate plate; 40, heating element; 50, gap; 60, mounting hole; 70, notch. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain this utility model and do not constitute a limitation on this utility model.

[0030] like Figure 1 and Figure 2As shown, an instant heating module includes a cover plate 10, a heat-conducting plate 30, and a heating element 40. The cover plate 10 has a continuous rib 20. The heat-conducting plate 30 includes a partition and a heat-conducting part. The partition is located on the open side of the rib 20 to define a closed fluid passage. The heat-conducting part is located on the side of the partition away from the fluid passage. The partition and the heat-conducting part are welded to the cover plate 10. The heating element 40 is located on the side of the heat-conducting part away from the fluid passage, and the heat generated by it is transferred to the fluid passage. The cover plate 10 has a flange on the side facing the partition. A gap 50 is provided between the side of the heat-conducting part and the flange on the corresponding side. The coefficient of thermal expansion of the heat-conducting part is greater than the coefficient of thermal expansion of the cover plate 10. Preferably, the flanges of the cover plate 10 can be set around all four sides. The purpose of this is to limit the heat-conducting plate 30 when it is placed, preventing it from easily sliding off the edge of the cover plate 10. Alternatively, the flanges can be set on any opposite side. In this case, the heat-conducting plate 30 needs to be positioned using an additional positioning structure, and it is not necessary to set flanges around all four sides of the cover plate 10. The heat-conducting plate 30 is fixed to the cover plate 10. The partition covers the open end of the rib 20 on the cover plate 10, forming a continuous fluid passage between the partition and the rib 20. This passage can be filled with gas or liquid. Under the action of the heating element 40, the heating element 40 heats the heat-conducting part of the heat-conducting plate 30. The heat-conducting part transfers the temperature to the partition, and the heat is transferred to the gas or liquid in the fluid passage through the partition, thereby achieving the heating effect.

[0031] Specifically, the heat-conducting plate 30 is fixed to the cover plate 10, and a gap 50 is left between the perimeter of the heat-conducting part and the corresponding flange of the cover plate 10. This gap 50 allows for the expansion of the heat-conducting part. When the cover plate 10 and the heat-conducting plate 30 are brazed, because the coefficient of thermal expansion of the heat-conducting part is greater than that of the cover plate 10, the heat-conducting part expands due to excessive temperature. The gap 50 can provide sufficient space for the expansion of the heat-conducting part, thereby avoiding the heat-conducting part from being squeezed by the flange due to expansion, which would cause the flange to deform. It also avoids the flange from bending under pressure, which would cause the partition part to not fit tightly with the cover plate 10, affecting the brazing quality. Compared with the original product, the area of ​​the heat-conducting part can be further reduced in this method, which also reduces the material cost of the product. In addition to brazing, this application can also use solder paste to weld the cover plate 10 and the heat-conducting plate 30 together.

[0032] like Figure 1 and Figure 2 As shown, mounting holes 60 are evenly arranged along the edge of the cover plate 10. The mounting holes 60 are used to fix the instant heating module inside the corresponding product. The mounting holes 60 can be evenly arranged at the four corners of the cover plate 10. The cover plate 10 can be fixed inside the corresponding product through the mounting holes 60 at the four corners. In addition, the mounting holes 60 can also be arranged at the long side of the cover plate 10 and the heat conduction plate 30, which is the gap 50, which can further improve the stability of product installation.

[0033] like Figure 1 and Figure 2 As shown, the partition has notches 70 at its edge for pre-drilled mounting holes 60. The partition has notches 70 around each mounting hole 60, which allow for the insertion and removal of bolts, screws, or pins, facilitating product installation. Simultaneously, the notches 70 do not contact the heat-conducting part, preventing the heat from being directed to the mounting holes 60, thus avoiding overheating and potential expansion of the bolts, screws, or pins at the mounting holes 60, which could affect the stability of the instant heating module within the product. In this application, the mounting holes 60 are located at the four corners of the cover plate 10, and the partition has inclined notches 70 at these corners.

[0034] like Figure 2 As shown, the heating element 40 is mounted on the heat-conducting part. Several ribs are provided on the heat-conducting part to clamp and position the heating element 40, facilitating welding and positioning. The heating element 40 can be a heating tube, heating element, heating film, heating wire, or other devices, and is fixed on the heat-conducting part. Welding is preferred for supplying heat to the heat-conducting part. If a heating film is used, it can be directly attached to the heat-conducting part. If a heating wire is used, it can be wound around the heat-conducting part. Several electronic temperature controllers, such as NTC thermistor electronic temperature controllers, or mechanical temperature controllers, such as snap-action mechanical temperature controllers, are provided on the heat-conducting part. Several temperature control columns are installed on the partition, penetrating the heat-conducting part and fixing the temperature controllers.

[0035] like Figure 2 As shown, to further improve the brazing effect of the product, this application selects the width of the gap 50 between the heat-conducting part and the flange to be 0.5-10mm. When the gap 50 is 0.5mm, the distance between the heat-conducting part and the flange is relatively close, allowing the heat-conducting part to expand during brazing, but the flange is easily squeezed by the expansion of the heat-conducting part. When the gap 50 is 10mm, the distance between the heat-conducting part and the flange is relatively far. At this time, even if the heat-conducting part expands during the brazing process, its edge will not contact the flange, which can also reduce the overall material usage of the heat-conducting part, reduce costs, and will not affect the overall performance of the instant heating module. When the gap 50 is 0.9mm, the heat-conducting part expands when heated, and its edge can fit exactly against the flange of the cover plate 10, and the flange will not be squeezed or deformed.

[0036] like Figure 2 As shown, the heating element 40 covers the edge of the fluid passage. In order to further improve the overall heating efficiency of the instant heating module, the heating element 40 covers the entire heat-conducting part, thereby increasing the minimum area of ​​the heat-conducting part to adapt to the heating element 40 and the fluid passage, avoiding waste caused by the excessive area of ​​the heat-conducting part. The heat-conducting part only needs to transfer heat to the partition as much as possible, reducing the area of ​​the heat-conducting part and reducing heat loss.

[0037] like Figure 1 and Figure 2 As shown, the cover plate 10 is also provided with a positioning structure on one side facing the heat-conducting plate 30. The positioning structure is used to limit the position of the heat-conducting plate 30. The positioning structure can limit the position between the heat-conducting plate 30 and the cover plate 10 before the heat-conducting plate 30 is brazed, thus playing a role in pre-positioning the welding. Since the area of ​​the heat-conducting part is smaller than the area of ​​the cover plate 10, the positioning structure can ensure that after the heat-conducting plate 30 and the cover plate 10 are brazed, the heat-conducting part can completely cover the fluid passage, thus fixing the position of the brazed part.

[0038] As an example of this application:

[0039] The positioning structure includes a protrusion on the partition and a groove or hole on the heat-conducting part for the protrusion to be inserted. The protrusion is inserted into the heat-conducting part. Both methods can be used to limit the position of the heat-conducting plate 30, ensuring that the heat-conducting part is limited to the partition, which facilitates subsequent brazing work.

[0040] As an embodiment of this application:

[0041] The positioning structure includes clamping blocks at least on opposite sides of the partition. The clamping blocks are fixed to the partition and press or adhere to the edge of the heat-conducting plate 30. The clamping blocks are located on opposite sides of the heat-conducting plate 30, or around the perimeter of the heat-conducting plate 30. When the clamping blocks press against the side of the heat-conducting plate 30, if brazing is used, the heat-conducting plate 30 will expand towards the clamping blocks. At this time, there is a distance between the fixed end of the clamping block in the partition and the heat-conducting plate 30, so it will not hinder the expansion of the heat-conducting part. Even if it affects the expansion of the heat-conducting part, a reserved groove can be made in the part of the heat-conducting part near the clamping blocks to avoid the heat-conducting plate 30 being squeezed by the clamping blocks due to expansion, causing interference.

[0042] As an embodiment of this application:

[0043] like Figure 1As shown, the heat-conducting plate 30 includes a fixed heat transfer plate 301 and at least one intermediate plate 302. Multiple intermediate plates 302 can be selected. In this application, the partition uses an intermediate plate 302, and the heat-conducting part uses a heat transfer plate 301. Preferably, the partition uses one intermediate plate 302. The intermediate plate 302 covers the open surface of the rib 20, forming a continuous fluid passage. The heating element 40 is installed on the side of the heat transfer plate 301 away from the intermediate plate 302. The heat generated by the heating element 40 is transferred to the heat transfer plate 301, and the heat transfer plate 301 transfers the heat to the fluid passage through the intermediate plate 302. The heat transfer plate 301 and the intermediate plate 302 can also be integrally molded, i.e., using a mold processing technology. The coefficient of thermal expansion of the heat transfer plate 301 is greater than that of the intermediate plate 302. The heat transfer plate 301 can be made of copper, aluminum alloy, silver or other materials, but considering the cost, aluminum alloy is preferred. The intermediate plate 302 and the cover plate 10 are preferably made of stainless steel to ensure water quality.

[0044] Based on Embodiment 3, the partition and heat-conducting parts are not limited to being plate-shaped; they can also be frames, such as heat transfer frames and intermediate frames. The shapes of the heat transfer frames and intermediate frames can be irregular or symmetrical, such as for easy installation of the heating element 40, where the heating element 40 is embedded in the heat transfer frame, or heating wire is wound around the heat transfer frame. Alternatively, heat transfer blocks and intermediate blocks can be used, such as having grooves in the intermediate blocks to accommodate the heat transfer blocks, thereby reducing the contact area between the heat transfer blocks and the external environment and minimizing heat dissipation. The specific choice can be made according to the installation requirements.

[0045] like Figure 1 and Figure 2 As shown, a fluid inlet and a fluid outlet are respectively provided at both ends of the fluid passage. The fluid inlet and outlet can be configured in various ways. For example, both the fluid inlet and outlet can be fitted with connectors on the cover plate 10, connecting the two ends of the fluid passage. The fluid inlet supplies liquid or gas into the fluid passage, allowing the liquid or gas to be heated by the heat from the partition within the fluid passage and discharged from the fluid outlet. Alternatively, the two ends of the rib 20 can be connected to the side of the cover plate 10. It should be noted that the fluid inlet and outlet are connected to the side of the cover plate 10. In this case, the connectors or pipes are installed from the fluid inlet and outlet on the side of the cover plate 10, with sealing rings fitted externally and inserted into the fluid inlet and outlet.

[0046] A household appliance that uses the instant heating module described above, the instant heating module including any one of a water dispenser, garment steamer, electric iron, steam mop, steam wallpapering machine, dishwasher and washing machine, wherein the mounting hole 60 can be fixed in the frame of the corresponding appliance for complete installation and operation, the instant heating module can improve the heating efficiency of water through the heating element 40 and the heat conduction plate 30 to provide hot water for the aforementioned household appliance.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An instant heating module, characterized in that, include: Cover plate (10) having a continuous rib (20); The heat-conducting plate (30) welded to the cover plate (10) includes a partition and a heat-conducting part. The partition is located on the open surface of the rib (20) to define a closed fluid passage. The heat-conducting part is located on the side of the partition away from the fluid passage. as well as A heating element (40) is provided on the heat-conducting part, and the heat generated therefrom is transferred to the fluid passage; The cover plate (10) has a flange on the side facing the partition, and a gap (50) is provided between the side of the heat-conducting part and the flange on the corresponding side. The thermal expansion coefficient of the heat-conducting part is greater than that of the cover plate (10).

2. The instant heating module as described in claim 1, characterized in that, The width of the gap (50) is 0.5-10 mm.

3. The instant heating module as described in claim 1, characterized in that, Mounting holes (60) are evenly provided at the edge of the cover plate (10).

4. The instant heating module as described in claim 3, characterized in that, The edge of the heat-conducting plate (30) is provided with a notch (70) for the pre-drilled mounting hole (60).

5. The instant heating module as described in claim 1, characterized in that, The heat-conducting part includes a heat transfer plate (301), the partition part includes at least one intermediate plate (302), the intermediate plate (302) covers the open surface of the rib (20), the heating element (40) is installed on the side of the heat transfer plate (301) away from the intermediate plate (302), and the coefficient of thermal expansion of the heat transfer plate (301) is greater than the coefficient of thermal expansion of the intermediate plate (302).

6. The instant heating module as described in claim 1, characterized in that, The partition is further provided with a positioning structure on the side facing the heat-conducting part, and the positioning structure is used to define the position of the heat-conducting part.

7. The instant heating module as described in claim 6, characterized in that, The positioning structure includes a protrusion provided on the side of the partition facing the heat-conducting part, and the protrusion is inserted into the heat-conducting part.

8. The instant heating module as described in claim 6, characterized in that, The positioning structure includes at least one clamping block on the opposite side of the heat-conducting part, the clamping block being fixed on the partition, and the clamping block pressing against or fitting against the edge of the heat-conducting part.

9. The instant heating module as described in claim 1, characterized in that, A fluid inlet and a fluid outlet are respectively provided at both ends of the fluid passage.

10. A household appliance, characterized in that, The household appliance is a water dispenser, garment steamer, electric iron, steam mop, steam wallpapering machine, dishwasher or washing machine that uses the instant heating module as described in any one of claims 1-9.

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