Wireless heat storage type steam heating holding furnace
By combining phase change molten salt thermal storage modules and steam modules, the safety and heating effect problems of existing heating equipment are solved, achieving wireless, uniform, and efficient food heating and heat preservation.
Patent Information
- Application Number
- CN202511255172.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2025-10-21
AI Technical Summary
Existing food heating and heat preservation equipment suffers from high safety hazards, high energy consumption, and poor heating effect. In particular, electric heating equipment cannot effectively heat food containers with concave structures.
Using a phase change molten salt thermal storage module as the heat source, and utilizing water vaporization in the steam module to form steam as the heat transfer medium, combined with a concave heat extraction surface and a multi-layer insulation structure, wireless heating and uniform heating are achieved.
It enables safe use without electricity, is suitable for uniform and efficient heating of food containers of different shapes, and improves heat utilization efficiency and heat preservation effect.
Smart Images
Figure CN120814744A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of phase-change molten salt heat storage, and in particular to a wireless heat storage type steam heating and holding furnace. Background Art
[0002] In the food heating and insulation industry, food is currently mainly heated and insulated by open flame heating or electric heating. However, using open flame heating has defects such as high safety risks and high energy consumption; using electric heating has defects such as low safety and the need to work with live wires. At the same time, electric heating methods mostly transfer heat through contact between the heating panel and the food container. However, the bottoms of existing containers such as bowls and plates for holding food are mostly concave structures, resulting in poor contact and heating effects. Summary of the Invention
[0003] The present invention aims to overcome the above-mentioned defects in the prior art and provides a wireless heat storage steam heating insulation furnace. By using a heat storage module of phase change molten salt as a heat source, the insulation furnace can be used wirelessly and safely without electricity; at the same time, the water vapor formed by the vaporization of water in the steam module is used as a heat transfer medium, so that it can be suitable for uniform and efficient heating of food containers with different bottom shapes, effectively ensuring the insulation effect.
[0004] To achieve the above-mentioned object, the present invention provides a wireless heat storage steam heating and holding furnace, comprising a shell, and a heat storage module and a steam module arranged in the shell; The heat storage module includes a metal container, a phase-change molten salt filled in the metal container, and a heating element for heating the phase-change molten salt, wherein the top surface of the metal container has a heat extraction surface; The steam module includes a heat-conducting plate connected to the heating surface of the metal container for heat transfer and having a vaporization cavity in the middle, and an upper panel arranged on the outer periphery of the heat-conducting plate. The vaporization cavity of the heat-conducting plate is used to hold water and is heated by the heat storage module to vaporize the water into steam to heat the bottom of the food container placed on the upper panel.
[0005] It is further configured as follows: the top surface of the metal container corresponding to the heating surface is a concave sink structure.
[0006] It is further configured that: the vaporization cavity of the heat conducting plate is a concave cavity structure which is recessed into the sink of the metal container; The heating element is integrally connected to the peripheral wall of the heat-conducting plate cavity, and both the heating element and the heat-conducting plate are connected to the top surface of the metal container through heat-conducting material.
[0007] It is further configured that: the thermal conductive material is aluminum, copper or graphite.
[0008] It is further configured that: the upper surface of the heat conducting plate corresponding to the outer periphery of the vaporization chamber is a slope structure, and the upper surface of the upper panel is also a slope structure.
[0009] It is further configured as follows: a plurality of guide grooves are arranged at intervals around the upper surface of the upper panel, and the depth of the guide grooves gradually increases from the outside to the inside.
[0010] It is further configured as follows: the heat storage module also includes a connector connected to the heating element through a power line and a temperature control line, and the connector is fixedly installed on the bottom or the peripheral wall of the shell.
[0011] It is further configured that: the external structure of the metal container except the top surface or the heating surface is provided with at least one thermal insulation layer, and at least one thermal insulation layer includes a vacuum layer.
[0012] It is further configured as follows: a reflective layer is provided on the inner wall of the vacuum layer, and the reflective layer is a copper plating layer or a high-reflectivity high-temperature paint layer.
[0013] It is further set as follows: the vacuum degree of the vacuum layer is ≤10 -2 -10 -3 Pa.
[0014] It is further configured that: at least one of the heat insulation layers further includes an air barrier layer located inside the vacuum layer, and the air barrier layer is a sealed cavity.
[0015] It is further configured that: the air barrier layer is filled with a heat insulating material, and the heat insulating material is glass fiber and / or aerogel.
[0016] It is further configured that: the phase-change molten salt is a binary salt or a ternary salt having a melting point temperature in the range of 60°C-300°C.
[0017] Compared with the prior art, the present invention has the following advantages: 1. Using a heat storage module with phase-change molten salt as a heat source enables the holding furnace to be used wirelessly without power, ensuring the safety of the holding furnace; 2. The steam generated by the vaporization of water in the steam module is used as a heat transfer medium, which can be applied to food containers with different bottom shapes for uniform and efficient heating, thereby ensuring the heat preservation effect; 3. The heating surface is a concave sink structure, which can ensure that there is always a direct heat transfer path between the phase change molten salt and the heating surface, thereby ensuring stable and reliable heat release from the heating surface; 4. By constructing at least one layer of thermal insulation layer on the outside of the metal container, the ineffective path of heat transfer is effectively blocked, the effect of directional heat release is achieved, the efficiency of thermal energy utilization is fully improved, and the effective use time is extended. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the vertical cross-sectional structure of a wireless heat storage steam heating and holding furnace of the present invention; Figure 2 It is a schematic diagram of a vertical cross-section structure of a food container placed on a holding furnace; Figure 3 It is a vertical cross-sectional structural diagram of another embodiment of the holding furnace.
[0019] The following reference numerals are marked on the accompanying drawings: 10. Outer shell; 20. Heat storage module; 21. Metal container; 211. Heating surface; 212. Sink; 213. Compensation space; 214. Vacuum layer; 215. Air barrier layer; 216. Thermal insulation material; 22. Phase-change molten salt; 23. Heating element; 24. Connector; 30. Steam module; 31. Heat conduction plate; 311. Vaporization chamber; 312. First slope; 32. Upper panel; 321. Second slope; 322. Diversion trough; 40. Food container. DETAILED DESCRIPTION
[0020] A specific embodiment of the present invention is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.
[0021] The present invention provides a wireless heat storage steam heating and heat preservation furnace. Figure 1 、 Figure 2 and Figure 3 As shown, it includes a shell 10, and a heat storage module 20 and a steam module 30 arranged in the shell 10, wherein the heat storage module 20 includes a metal container 21, a phase change molten salt 22 filled in the metal container 21, a heating element 23 for heating the phase change molten salt 22, and a connector 24 connected to the heating element 23 through a power line and a temperature control line. The top surface of the metal container 21 has a heating surface 211. The phase change molten salt 22 is preferably a binary salt or a ternary salt with a melting point temperature in the range of 60°C-300°C. The connector 24 is fixedly mounted on The connector 24 is connected to the bottom wall or peripheral wall of the outer shell 10 through a power cord to energize the heating element 23 to heat the phase-change molten salt 22 for heat storage; the steam module 30 includes a heat-conducting plate 31 which is heat-transferably connected to the heating surface 211 of the metal container 21 and has a vaporization cavity 311 in the middle, and an upper panel 32 arranged on the outer periphery of the heat-conducting plate 31. The vaporization cavity 311 of the heat-conducting plate 31 is used to hold water and is heated by the heat storage module 20 to vaporize the water into steam to heat the bottom of the food container 40 placed on the upper panel 32.
[0022] In this embodiment, if Figure 1As shown, the upper surface of the heat-conducting plate 31 corresponding to the outer periphery of the vaporization chamber 311 is an inclined first slope 312 structure, and the upper surface of the upper panel 32 is an inclined second slope 321 structure, so that the condensed water droplets formed after the water vapor formed in the vaporization chamber 311 contacts the bottom of the food container 40 can flow back to the vaporization chamber 311 along the upper surface of the upper panel 32 and the heat-conducting plate 31 for recycling; preferably, a plurality of guide grooves 322 are arranged at intervals around the upper surface of the upper panel 32, and the depth of the guide grooves 322 gradually increases from the outside to the inside, so that the condensed water droplets can conveniently flow back into the vaporization chamber 311 along the guide grooves 322, and at the same time, the arrangement of the guide grooves 322 can effectively reduce the flow area with the outside to reduce steam loss.
[0023] In this embodiment, if Figure 1 and Figure 2 As shown, the top surface of the metal container 21 is concave at the heating surface 211 to form a sink 212 structure, so that a compensation space 213 is formed inside the metal container 21 at the outer periphery of the sink 212 to adapt to the volume change of the phase-change molten salt 22 during the phase change process (the volume is small in the solidified state and large in the liquefied state). In this way, the sink 212 is concave and immersed in the phase-change molten salt 22 to ensure that the liquid level of the phase-change molten salt 22 always changes in the compensation space 213, so that there is always a direct heat transfer path between the phase-change molten salt 22 and the heating surface 211 to ensure efficient and stable heat transfer between the two.
[0024] In this embodiment, if Figure 1 and Figure 2 As shown, the vaporization cavity 311 of the heat conducting plate 31 is a concave cavity structure that is recessed into the sink 212 of the metal container 21. The heating element 23 is integrally connected to the peripheral wall of the concave cavity of the heat conducting plate 31 (constituting a heating plate structure for easy overall purchase). The heating element 23 and the heat conducting plate 31 are both connected to the top surface of the metal container 21 through a heat conducting material, and the heat conducting material is aluminum, copper or graphite with high thermal conductivity.
[0025] In this embodiment, if Figure 1 and Figure 3 As shown, the metal container 21 is provided with at least one thermal insulation layer corresponding to the external structure except the top surface or the heat extraction surface 211, and the at least one thermal insulation layer includes a vacuum layer 214. Thus, the isolation of the at least one thermal insulation layer can ensure that most of the heat is released outward through the top surface or the heat extraction surface 211, thereby greatly improving the energy storage utilization rate and extending the service life of the heat storage module 20; at the same time, the vacuum layer 214 is preferably made of 304 stainless steel material through a stamping, welding, vacuum sealing process, and its vacuum degree is preferably ≤10 -2 -10 -3 Pa, that is, the vacuum degree is generally ≤10 -2 Pa, vacuum degree ≤10 when higher requirements are required-3 Pa, to ensure excellent thermal insulation performance; preferably, a reflective layer is provided on the inner wall of the vacuum layer 214, and the reflective layer is a copper plating layer or a high-reflectivity high-temperature paint layer, which can effectively reduce the heat transferred to the outside by thermal radiation.
[0026] In some specific embodiments, at least one thermal insulation layer on the outside of the metal container 21 may be a single vacuum layer 214 structure (e.g. Figure 1 ), which can be a double-layer isolation structure with the vacuum layer 214 outside and the air isolation layer inside (such as Figure 3 ), or it can be a multi-layer structure including a vacuum layer 214, an air isolation layer and other thermal insulation structures, wherein the above-mentioned air isolation layer is a sealed cavity structure that can block air convection, so that the air barrier layer 215 with a closed cavity structure can further reduce heat transfer and heat convection; in order to further enhance the thermal insulation effect of the air barrier layer 215, it is preferred that the air barrier layer 215 is filled with a thermal insulation material 216, and the thermal insulation material 216 is preferably glass fiber and / or aerogel.
[0027] Compared with the prior art, the present invention has the following advantages: 1. Using a heat storage module with phase-change molten salt as a heat source enables the holding furnace to be used wirelessly without power, ensuring the safety of the holding furnace; 2. The steam generated by the vaporization of water in the steam module is used as a heat transfer medium, which can be applied to food containers with different bottom shapes for uniform and efficient heating, thereby ensuring the heat preservation effect; 3. The heating surface is a concave sink structure, which can ensure that there is always a direct heat transfer path between the phase change molten salt and the heating surface, thereby ensuring stable and reliable heat release from the heating surface; 4. By constructing at least one layer of thermal insulation layer on the outside of the metal container, the ineffective path of heat transfer is effectively blocked, the effect of directional heat release is achieved, the efficiency of thermal energy utilization is fully improved, and the effective use time is extended.
[0028] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.
Claims
1. A wireless heat storage steam heating and holding furnace, characterized in that: It comprises a shell, and a heat storage module and a steam module arranged in the shell; The heat storage module includes a metal container, a phase-change molten salt filled in the metal container, and a heating element for heating the phase-change molten salt, wherein the top surface of the metal container has a heat extraction surface; The steam module includes a heat-conducting plate connected to the heating surface of the metal container for heat transfer and having a vaporization cavity in the middle, and an upper panel arranged on the outer periphery of the heat-conducting plate. The vaporization cavity of the heat-conducting plate is used to hold water and is heated by the heat storage module to vaporize the water into steam to heat the bottom of the food container placed on the upper panel.
2. A wireless heat storage steam heating and holding furnace according to claim 1, characterized in that: The top surface of the metal container corresponding to the heat extraction surface is a concave sinking structure.
3. The wireless heat storage steam heating and holding furnace according to claim 2, characterized in that: The vaporization cavity of the heat conducting plate is a concave cavity structure which is recessed into the sink of the metal container; The heating element is integrally connected to the peripheral wall of the heat-conducting plate cavity, and both the heating element and the heat-conducting plate are connected to the top surface of the metal container through heat-conducting material.
4. The wireless heat storage steam heating and holding furnace according to claim 3, characterized in that: The heat conducting material is aluminum, copper or graphite.
5. The wireless heat storage steam heating and holding furnace according to claim 1, characterized in that: The upper surface of the heat conducting plate corresponding to the periphery of the vaporization chamber is a slope structure, and the upper surface of the upper panel is also a slope structure.
6. The wireless heat storage steam heating and holding furnace according to claim 5, characterized in that: A plurality of guide grooves are arranged at intervals around the upper surface of the upper panel, and the depth of the guide grooves increases gradually from the outside to the inside.
7. The wireless heat storage steam heating and holding furnace according to claim 1, characterized in that: The heat storage module also includes a connector connected to the heating element through a power line and a temperature control line, and the connector is fixedly installed on the bottom or the peripheral wall of the shell.
8. The wireless heat storage steam heating and holding furnace according to claim 1, characterized in that: The metal container is provided with at least one thermal insulation layer corresponding to the external structure except the top surface or the heat extraction surface, and at least one thermal insulation layer includes a vacuum layer.
9. The wireless heat storage steam heating and holding furnace according to claim 8, characterized in that: A reflective layer is provided on the inner wall of the vacuum layer, and the reflective layer is a copper plating layer or a high-reflectivity high-temperature paint layer.
10. The wireless heat storage steam heating and holding furnace according to claim 8, characterized in that: The vacuum degree of the vacuum layer is ≤10 -2 -10 -3 Pa.
11. The wireless heat storage steam heating and holding furnace according to claim 1, characterized in that: At least one of the heat-insulating layers further comprises an air barrier layer located inside the vacuum layer, and the air barrier layer is a sealed cavity.
12. The wireless heat storage steam heating and holding furnace according to claim 10, characterized in that: The air barrier layer is filled with a heat insulating material, and the heat insulating material is glass fiber and / or aerogel.
13. The wireless heat storage steam heating and holding furnace according to claim 1, characterized in that: The phase-change molten salt is a binary salt or a ternary salt having a melting point temperature within the range of 60° C. to 300° C.