A heating module and liquid heating apparatus

Abstract

This utility model relates to the field of heating appliances and discloses a heating module suitable for liquid heating equipment, including a heating element and a cover plate. A heating layer made of thick-film heating material is provided on one side of the heating element; a flow guide groove is provided on the other side of the heating element. The cover plate and the flow guide groove form a medium channel that allows the working medium to flow. This utility model integrates the heating plate and the water circuit board into a single structure, solving the problem of poor consistency caused by deformation due to the independent structures of the heating plate and water circuit board in the prior art. Furthermore, the sidewalls of the flow guide groove form reinforcing ribs, enhancing the structural strength of the heating element, improving its resistance to deformation, and increasing the heating controllability of the heating module. Simultaneously, the working medium flows in a designated direction to achieve gradual heating of the working medium, improving the temperature control accuracy of the heating module. This utility model also provides a liquid heating device.

Description

Technical Field

[0001] This utility model relates to the technical field of heating appliances and their peripheral supporting facilities, and in particular to a heating module and a liquid heating device. Background Technology

[0002] A flat-plate heating element is a device that converts electrical energy or other forms of energy into heat energy and transfers the heat through the surface of a flat plate. Flat-plate heating elements have a wide range of applications, meeting various heating needs in industrial production, home life, healthcare, laboratories, and other fields. Furthermore, the large heating area of ​​a flat-plate heating element ensures uniform heating of the object being heated, avoiding localized overheating or underheating, making it increasingly popular across various industries.

[0003] In existing technologies, flat-plate heating elements involve screen-printing a thick-film heating material onto a flat metal plate. When these heating elements are used in devices that heat water or other liquids, such as water dispensers and formula makers, the thick-film heating material is typically screen-printed onto a thinner plate to maximize heat transfer efficiency and achieve rapid heating. The metal plate is then mounted onto a water distribution plate, with the non-screen-printed side in contact with the water. The water distribution plate has channels that direct the water flow, allowing the water to be heated gradually as it passes through these channels. The thick-film heating plate and the water distribution plate are independent of each other.

[0004] During the sintering process, the different shrinkage coefficients of the metal and thick film materials, as well as the differences in heating and cooling efficiencies, cause the metal plate to arch and deform towards the screen-printed surface. The amount of deformation is uncontrollable, varying between different production batches and depending on the heating element's hot and cold states during operation. Consequently, water cannot flow completely through the designed water channel in the designated direction during operation; instead, some water flows through the deformed gaps. This variation in deformation leads to different amounts of water flowing through these gaps, resulting in poor consistency in mass production, hindering mass production, and making it impossible to precisely control the outlet water temperature.

[0005] Furthermore, because thick-film materials require high-temperature sintering to function properly, a relatively rough carbonized layer forms on the surface of the metal plate during the sintering process. This layer easily accumulates scale during water heating. Scale buildup can clog water passages, reduce thermal conductivity, and cause dry burning, significantly shortening the machine's lifespan and, in severe cases, even leading to a fire. Utility Model Content

[0006] The purpose of this invention is to provide a heating module and a liquid heating device to solve the problems existing in the above-mentioned related technologies, improve the structural consistency of the heating element, improve the temperature control accuracy of the heating module, and extend the service life of the device.

[0007] To achieve the above objectives, this utility model provides the following solution:

[0008] This utility model provides a heating module suitable for liquid heating equipment, comprising:

[0009] The heating element has a plate-like structure. A heating layer is provided on one side of the heating element. The heating layer is made of a thick film heating material and can be electrically connected to an external power source. A flow guide groove is provided on the other side of the heating element. The flow guide groove is a U-shape with an open top and the sidewall of the flow guide groove is reinforced.

[0010] A cover plate is connected to the heating element and located on one side of the flow guide groove. The cover plate and the flow guide groove form a medium channel that allows the working medium to flow.

[0011] Preferably, the heating element is made of metal and the thickness of the heating element is not less than 6mm.

[0012] Preferably, the heating element is further connected to an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are respectively connected to both ends of the medium channel.

[0013] Preferably, the guide channel has a serpentine structure.

[0014] Preferably, there are multiple sets of guide channels.

[0015] In preparing the heating module suitable for liquid heating equipment, the heating layer is processed on one side of the heating element by screen printing; the flow guide groove is processed on the other side of the heating element by machining.

[0016] Preferably, the heating layer is prepared using a multilayer printing method;

[0017] First, four layers of first insulating layer are printed on the heating element; then, a conductor pad layer is printed on top of the first insulating layer, which can be used to solder power supply terminals; a resistive heating layer is printed on top of the conductor pad layer; and finally, a second insulating layer is printed on top of the resistive heating layer.

[0018] Preferably, the thickness of the first insulating layer and the second insulating layer ranges from 10 μm to 30 μm; the thickness of the conductor pad layer and the resistive heating layer ranges from 30 μm to 50 μm.

[0019] Preferably, the sintering temperature range of the heating layer is 600℃~950℃.

[0020] This utility model also provides a liquid heating device, including the above-mentioned heating module suitable for liquid heating.

[0021] The present invention achieves the following technical effects compared with related technologies: The heating module of the present invention, applicable to liquid heating equipment, includes a heating element and a cover plate. The heating element has a plate-like structure, and a heating layer is provided on one side of the heating element. The heating layer is made of a thick film heating material and can be electrically connected to an external power source. A flow guide groove is provided on the other side of the heating element. The flow guide groove is a U-shape with an open top, and the side wall of the flow guide groove forms reinforcing ribs. The cover plate is connected to the heating element and located on one side of the flow guide groove. The cover plate and the flow guide groove form a medium channel that allows the working medium to flow.

[0022] This invention relates to a heating module for liquid heating equipment. A heating layer is located on one side of the heating element, and a flow guide groove is located on the other side. When the heating layer is working, the working medium flows along the medium channel. The heating layer uses the heating element to transfer heat to the working medium, thus heating the medium. This invention integrates the heating plate and the water circuit board into a single structure, solving the problem of poor consistency caused by deformation in existing technologies where the heating plate and water circuit board are independent structures. Furthermore, the sidewalls of the flow guide groove form reinforcing ribs, further enhancing the structural strength of the heating element and improving its resistance to deformation. This minimizes the deformation problem of the heating element during the fabrication of the heating layer, avoiding adverse consequences caused by heating element deformation and improving the heating module's controllability. Simultaneously, the flow guide groove guides the working medium, allowing it to flow in a designated direction to achieve gradual heating of the working medium, which helps improve the temperature control accuracy of the heating module.

[0023] In the preparation of the heating module suitable for liquid heating equipment, a heating layer is screen-printed on one side of the heating element, and then a flow guide groove is machined on the other side of the heating element. The flow guide groove is machined after the heating layer is prepared. Compared to the prior art where a rough carbonized layer forms on the surface of the metal plate during sintering, the surface of the flow guide groove in this invention is relatively smooth, extending the time before scale formation, reducing the risks associated with scale formation, and extending the service life of the heating module.

[0024] This utility model also provides a liquid heating device, including the heating module described above that is suitable for liquid heating devices. Naturally, the liquid heating device of this utility model can also achieve the above-mentioned beneficial effects. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is an isometric view of a heating module for a liquid heating device disclosed in an embodiment of the present utility model.

[0027] Figure 2 This is a front view schematic diagram of a heating module suitable for liquid heating equipment disclosed in an embodiment of the present utility model;

[0028] Figure 3 This is a side view schematic diagram of a heating module suitable for a liquid heating device disclosed in an embodiment of the present utility model;

[0029] Figure 4 This is a disassembly diagram of a heating module for a liquid heating device disclosed in an embodiment of the present invention.

[0030] In the diagram: 1. Heating element; 2. Cover plate; 3. Flow guide groove; 4. Medium channel; 5. Reinforcing rib; 6. Inlet pipe; 7. Outlet pipe. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The purpose of this invention is to provide a heating module and a liquid heating device to solve the problems existing in the above-mentioned related technologies, improve the structural consistency of the heating element, improve the temperature control accuracy of the heating module, and extend the service life of the device.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] This embodiment provides a heating module suitable for liquid heating equipment. Please refer to [reference needed]. Figures 1-4 The device includes a heating element 1 and a cover plate 2. The heating element 1 has a plate-like structure. A heating layer is provided on one side of the heating element 1. The heating layer is made of a thick film heating material and can be electrically connected to an external power source. A flow guide trough 3 is provided on the other side of the heating element 1. The flow guide trough 3 is a U-shaped structure with an open top and a reinforcing rib 5 is formed on the side wall of the flow guide trough 3. The cover plate 2 is connected to the heating element 1 and is located on one side of the flow guide trough 3. The cover plate 2 and the flow guide trough 3 form a medium channel 4 that allows the working medium to flow.

[0036] This invention relates to a heating module for liquid heating equipment. A heating layer is provided on one side of the heating element 1, and a flow guide groove 3 is provided on the other side. When the heating layer is working, the working medium flows along the medium channel 4. The heating layer uses the heating element 1 to transfer heat to the working medium, thus heating the medium. This invention integrates the heating plate and the water circuit board into a single structure, solving the problem of poor consistency caused by deformation in existing technologies where the heating plate and water circuit board are independent structures. Furthermore, the sidewall of the flow guide groove 3 forms reinforcing ribs 5, further enhancing the structural strength of the heating element 1 and improving its resistance to deformation. This minimizes the deformation problem of the heating element 1 during the fabrication of the heating layer, avoiding adverse consequences caused by deformation and improving the controllability of the heating module. Simultaneously, the flow guide groove 3 guides the working medium, allowing it to flow in a designated direction to achieve gradual heating of the working medium, which helps improve the temperature control accuracy of the heating module.

[0037] The heating element 1 is made of metal and has a thickness of not less than 6 mm. The heating element 1 of this invention uses a thicker metal plate, providing a stable structural foundation for the preparation of the heating layer and the processing of the guide groove 3. Furthermore, in the prior art, the heating plate and the water circuit plate are independent structures, and the heating plate is a thin plate, which deforms after sintering. During later use, repeated heating and cooling increases the deformation, which can lead to cracking of the thick film or open circuits in the resistance circuit, causing heating failure. The heating element 1 of this invention uses a thick plate, resulting in higher structural strength during the sintering process of the heating layer. This helps to offset the deformation of the metal plate caused by the different shrinkage coefficients of the metal material and the thick film material, as well as the different heating and cooling efficiencies, ensuring the structural stability and heating reliability of the heating module.

[0038] To ensure the smooth flow of the working medium, the heating element 1 is also connected to an inlet pipe 6 and an outlet pipe 7. The inlet pipe 6 and the outlet pipe 7 are respectively connected to the two ends of the medium channel 4. The working medium is input into the medium channel 4 through the inlet pipe 6. During the flow along the medium channel 4, the working medium exchanges heat with the heating element 1 and is heated. The heated working medium flows out through the outlet pipe 7.

[0039] In this specific embodiment, the guide channel 3 has a serpentine structure, which gives the medium channel 4 multiple continuous bends. The working medium flows along the medium channel 4, extending the flow path of the working medium and improving the heating efficiency of the working medium. In other specific embodiments achievable by this invention, the guide channel 3 can also be configured in other shapes, such as strips or arcs. In addition, the width and depth of the guide channel 3 can be set according to the actual flow requirements of the working medium, and it can also be segmented into structures with different widths and depths to meet different specific working conditions and improve the flexibility and adaptability of the heating module.

[0040] In practical applications, the flow guide 3 can be set in multiple groups. The multiple groups of flow guide 3 can be connected in parallel with the inlet pipe 6 and the outlet pipe 7, or each flow guide 3 and the cover plate 2 can be equipped with a set of inlet pipe 6 and outlet pipe 7 to meet the heating requirements of different working media and further improve the flexibility and adaptability of the heating module.

[0041] Accordingly, in practical applications, the inlet pipe 6 and the outlet pipe 7 can be detachably connected to the heating element 1 for easy disassembly and assembly. A sealed threaded connection can be selected to ensure the sealing of the connection while allowing for disassembly.

[0042] This invention relates to a heating module for liquid heating equipment. Heating layers and flow channels 3 are provided on both sides of the heating element 1, integrating the heating plate and water circuit board into a single structure. This solves the problem of inconsistent heating plate and water circuit board structures due to deformation in existing technologies. Furthermore, the sidewalls of the flow channels 3 form reinforcing ribs 5, further enhancing the structural strength of the heating element 1 and improving its resistance to deformation. This minimizes deformation during the fabrication of the heating layer, avoiding adverse consequences and improving the controllability of the heating module. In this invention, a heating layer is provided on one side of the heating element 1. After the heating layer is screen-printed, the flow channels 3 are processed on the other side of the heating element 1. Compared to existing technologies where a rough carbonized layer forms on the surface of the metal plate during sintering, the surface of the flow channels 3 in this invention is relatively smooth, extending the time before scale formation, reducing the risks associated with scale formation, and extending the service life of the heating module.

[0043] Example 2

[0044] This embodiment provides a heating module suitable for liquid heating equipment, including a heating element 1 and a cover plate 2. In this embodiment, the cover plate 2 is detachably connected to the heating element 1, and a sealing gasket is provided between the cover plate 2 and the heating element 1 to ensure the sealing of the medium channel 4 formed by the cover plate 2 and the guide groove 3.

[0045] The cover plate 2 and the heating element 1 are detachably connected, which facilitates disassembly and maintenance in the future. In practical applications, a bolt connection method can be selected.

[0046] In addition, in order to ensure that the working medium flows along the direction of the medium channel 4 and achieve the heating effect of gradual heating of the working medium, in this specific embodiment, the sealing gasket is set on the heating element 1 and is consistent with the shape of the guide groove 3. The sealing gasket is set on both sides of the opening of the guide groove 3. The cover plate 2 is connected to the heating element 1 and squeezes the sealing gasket to ensure the sealing of the medium channel 4, thereby ensuring the guiding effect of the medium channel 4 on the working medium and ensuring that the working medium flows along the direction of the medium channel 4.

[0047] The other structures of the heating module for liquid heating equipment in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0048] Example 3

[0049] When preparing the heating module suitable for liquid heating equipment according to Example 1 or Example 2, a heating layer is processed on one side of the heating element 1 by screen printing; and a guide groove 3 is processed on the other side of the heating element 1 by machining.

[0050] This invention first uses screen printing to process a heating layer on one side of the heating element 1, and then uses machining to process a flow guide groove 3 on the other side of the heating element 1. The flow guide groove 3 is machined after the heating layer is prepared. Compared to the existing technology where a rough carbonized layer forms on the surface of the metal plate during sintering, the surface of the flow guide groove 3 in this invention is relatively smooth, extending the time before scale formation, reducing the risks associated with scale formation, and extending the service life of the heating module.

[0051] Specifically, using a multi-layer printing method to prepare the heating layer helps to improve the printing precision of the heating layer.

[0052] In this specific embodiment, the heating layer is completed through seven screen printing processes. Specifically, firstly, four layers of first insulating layer are printed on the heating element 1; then, a conductor pad layer is printed on top of the first insulating layer. The conductor pad layer can be used to solder power supply terminals so that the subsequent heating layer can be connected to an external power source; a resistance heating layer is printed on top of the conductor pad layer; finally, a second insulating layer is printed on top of the resistance heating layer to ensure the safety of the heating layer. It should be noted that each screen-printed layer needs to be sintered at high temperature in a tunnel furnace.

[0053] The thickness of the first and second insulating layers ranges from 10 μm to 30 μm; the thickness of the conductor pad layer and the resistive heating layer ranges from 30 μm to 50 μm. Layered screen printing allows for precise control of the printing thickness of each layer, thereby ensuring the quality of the heating layer fabrication.

[0054] In addition, it should be noted that the sintering temperature range of the heating layer is 600℃~950℃. The heating element 1 of this utility model is made of a thick plate, which has a higher sintering temperature than the thin plate in the prior art.

[0055] Example 4

[0056] This embodiment provides a liquid heating device, including a heating module suitable for liquid heating as described in Embodiment 1 or Embodiment 2.

[0057] The liquid heating equipment utilizes the heating module of this invention to heat the working medium, allowing the working medium to flow in a specified direction to achieve the purpose of gradually heating the working medium, which is beneficial for accurately controlling the heating temperature of the working medium.

[0058] The liquid heating equipment of this utility model includes, but is not limited to, the following: water boiler, warm water boiler, baby formula maker, and coffee machine.

[0059] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A heating module suitable for liquid heating equipment, characterized in that, include: The heating element has a plate-like structure and a heating layer is provided on one side of the heating element. The heating layer is made of a thick film heating material and can be electrically connected to an external power source. A flow guide groove is provided on the other side of the heating element. The flow guide groove is U-shaped with an opening at the top, and the side wall of the flow guide groove is formed with reinforcing ribs. A cover plate is connected to the heating element and located on one side of the flow guide groove. The cover plate and the flow guide groove form a medium channel that allows the working medium to flow.

2. The heating module for liquid heating equipment according to claim 1, characterized in that: The heating element is made of metal and has a thickness of not less than 6mm.

3. The heating module for liquid heating equipment according to claim 1, characterized in that: The heating element is also connected to an inlet pipe and an outlet pipe, and the inlet pipe and the outlet pipe are respectively connected to both ends of the medium channel.

4. The heating module for liquid heating equipment according to any one of claims 1-3, characterized in that: The flow channel has a serpentine structure.

5. The heating module for liquid heating equipment according to any one of claims 1-3, characterized in that: The flow guide channels are in multiple sets.

6. A liquid heating device, characterized in that: Includes the heating module suitable for liquid heating equipment as described in any one of claims 1-5.

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