Milk heater

Abstract

The utility model discloses a milk warmer which comprises a semiconductor refrigeration assembly and a milk barrel. Through the design that the cone-frustum-shaped heat conduction column extends to two thirds of the height of the milk barrel and the combination of the multiple sets of protruding edges, the contact area between the milk barrel and milk is remarkably increased, the heat conduction efficiency is improved, the problem that the heating speed is low due to the fact that the area of a traditional guide block is insufficient is solved, meanwhile, local heat flux density is reduced, and milk protein is prevented from denaturation due to heating; the heat conducting seat and the heat conducting column which are integrally formed are adopted, and the design of threaded fastening and the sealing gasket is matched, so that the problem of sealing failure caused by difference of thermal expansion coefficients of different materials is effectively solved, and the structural stability and the sealing reliability during long-term use are ensured.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor refrigeration technology, and in particular to a milk warmer heated by a semiconductor refrigeration component. Background Technology

[0002] Currently, it is often necessary to heat refrigerated milk before feeding infants. Various heating devices are commonly available, and semiconductor refrigeration components, which can both cool and heat, are also used in bottle warmers. For example, a publicly disclosed semiconductor intelligent hot and cold bottle consists of a temperature-controlled bottle body and a temperature-controlled circuit, including an outer shell and aluminum liner, a thermoelectric refrigeration component, conductive blocks, a heat insulation layer, a heat sink, a fan, a base frame, a base plate, a bottle cap, a circuit compartment, and a circuit board.

[0003] However, in the above-disclosed technology, the contact area between the guide block and the milk is too small, resulting in low heat conduction efficiency and long heating time, which cannot meet the immediate feeding needs of infants. At the same time, due to the excessively high local heat flux density, the milk protein is prone to denaturation, and there is also the problem of uneven temperature distribution. In order to solve the above problems, it is necessary to further improve the structure. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a milk warmer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a milk warmer, comprising a semiconductor cooling component and a milk container, wherein a heat sink is provided on the lower wall of the semiconductor cooling component, a cooling fan is provided on the lower wall of the heat sink, an insulation layer is provided on the upper wall of the heat sink, an installation cavity is provided on the inner side wall of the insulation layer, the semiconductor cooling component is located inside the installation cavity, a heat-conducting seat is fixedly connected to the upper wall of the semiconductor cooling component and located inside the installation cavity, a heat-conducting column is provided on the upper wall of the heat-conducting seat, one end of the heat-conducting column away from the heat-conducting seat penetrates through the lower wall of the milk container and extends into the milk container, the length of the heat-conducting column extending into the milk container is two-thirds of the axial length of the milk container, a fastening nut for pressing the milk container and the insulation layer is threadedly connected to the outer wall of the end of the heat-conducting column extending into the milk container, a sealing gasket for sealing is provided between the milk container and the heat-conducting seat, a top cover is threadedly connected to the upper end of the milk container, the sealing gasket is a food-grade silicone rubber sealing gasket, and the heat-conducting column and the fastening nut are both food-grade stainless steel.

[0006] As a further description of the above technical solution:

[0007] The heat-conducting column is shaped like a frustum of a cone, with the outer diameter of the end furthest from the heat-conducting base being smaller than that of the end closest to the heat-conducting base. The outer peripheral wall of the heat-conducting column inside the milk container is provided with multiple sets of protruding ridges. The multiple sets of protruding ridges are distributed in equal circumferences around the axis of the heat-conducting column. The top view projection of the protruding ridges is semi-circular, and the radius of the semi-circular protruding ridges is 1.5-2mm.

[0008] As a further description of the above technical solution:

[0009] The heat-conducting base and the heat-conducting column are integrally formed, and the surface roughness Ra of the heat-conducting column is ≤1.6μm.

[0010] As a further description of the above technical solution:

[0011] The heat-conducting base has a rectangular top view projection, and its top view projection area is consistent with the top view projection area of ​​the semiconductor cooling component.

[0012] As a further description of the above technical solution:

[0013] The heat-conducting base and the semiconductor cooling component, as well as the semiconductor cooling component and the heat sink, are connected by thermally conductive silicone.

[0014] As a further description of the above technical solution:

[0015] Both the left and right inner walls of the mounting cavity are provided with a set of slots. The inner wall of the heat-conducting base is provided with a mounting hole that runs through its body in a left-right direction. A fixing post is fixedly connected to the inner wall of the mounting hole. The left and right ends of the fixing post extend toward the left and right sides of the heat-conducting base, respectively. When the heat-conducting base is assembled with the mounting cavity, the two ends of the fixing post that extend to the outer wall of the heat-conducting base are respectively engaged with a set of slots. The inner walls of the two ends of the fixing post that extend to the outer wall of the heat-conducting base are provided with screw through holes. The inner wall of the screw through hole is provided with a first bolt. The first bolt passes through the screw through hole and is threadedly connected to the heat sink.

[0016] As a further description of the above technical solution:

[0017] The cooling fan is fixedly connected to the heat sink by four sets of second bolts.

[0018] As a further description of the above technical solution:

[0019] A temperature controller is fixedly connected to the front wall of the heat sink, and a protective cover is fixedly connected to the front wall of the heat sink and outside the temperature controller. A power cord for connecting to a power source is provided on the front wall of the protective cover.

[0020] This utility model has the following beneficial effects:

[0021] 1. Compared with existing technologies, this milk warmer, through the design of the conical heat-conducting column extending to two-thirds of the height of the milk container, combined with multiple sets of convex ridges, significantly increases the contact area with the milk, thereby improving the heat conduction efficiency. This solves the problem of slow heating speed caused by insufficient area of ​​traditional heat-conducting blocks, while reducing local heat flux density and preventing the denaturation of milk proteins due to heat.

[0022] 2. Compared with existing technologies, this milk warmer adopts an integrated heat-conducting base and heat-conducting column structure, combined with threaded fastening and sealing gasket design, which effectively overcomes the sealing failure problem caused by the difference in thermal expansion coefficients of different materials, ensuring structural stability and sealing reliability during long-term use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a milk warmer proposed in this utility model;

[0024] Figure 2 This is an exploded view of the overall structure of a milk warmer proposed in this utility model;

[0025] Figure 3 This utility model proposes a milk warmer. Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a top view of the insulation layer of a milk warmer proposed in this utility model;

[0027] Figure 5 This is a top view of the fixing column of a milk warmer proposed in this utility model.

[0028] Legend:

[0029] 1. Top cover; 2. Milk container; 3. Heat-conducting column; 301. Raised ridge; 4. Fastening nut; 5. Sealing gasket; 6. Insulation layer; 601. Mounting cavity; 602. Slot; 7. Fixing post; 701. Screw through hole; 8. First bolt; 9. Semiconductor cooling component; 10. Heat sink; 11. Thermostat; 12. Protective cover; 13. Power cord; 14. Cooling fan; 15. Second bolt; 16. Heat-conducting base; 1601. Mounting hole. Detailed Implementation

[0030] 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.

[0031] Reference Figures 1 to 5 The present invention provides a milk warmer comprising a semiconductor cooling component 9 and a milk container 2. The upper end of the milk container 2 is threadedly connected to a cover 1. A heat sink 10 is provided on the lower wall of the semiconductor cooling component 9. A cooling fan 14 is provided on the lower wall of the heat sink 10. The cooling fan 14 is fixedly connected to the heat sink 10 by four sets of second bolts 15.

[0032] To achieve stable heat dissipation of the semiconductor cooling component 9, an insulation layer 6 is provided on the upper wall of the heat sink 10. An installation cavity 601 is provided on the inner wall of the insulation layer 6. The semiconductor cooling component 9 is located inside the installation cavity 601. A set of slots 602 is provided on the left and right inner walls of the installation cavity 601. An installation hole 1601 is provided on the inner wall of the heat conduction seat 16, which runs through the body in a left-right direction. A fixing post 7 is fixedly connected to the inner wall of the installation hole 1601. The left and right ends of the fixing post 7 extend toward the left and right sides of the heat conduction seat 16, respectively. When the heat conduction seat 16 is assembled with the installation cavity 601, the two ends of the fixing post 7 extending to the outer wall of the heat conduction seat 16 are respectively engaged with a set of slots 602. The inner walls of the two ends of the fixing post 7 extending to the outer wall of the heat conduction seat 16 are provided with screw through holes 701. A first bolt 8 is provided on the inner wall of the screw through hole 701. The first bolt 8 passes through the screw through hole 701 and is threadedly connected to the heat sink 10.

[0033] The heat sink 10 and the cooling fan 14 are rigidly connected by four sets of second bolts 15. Two sets of slots 602 within the mounting cavity 601 engage with the fixing post 7 to provide dual positioning. This structure ensures efficient heat dissipation while eliminating vibration risks through the threaded connection of the first bolt 8 and the screw through-hole 701.

[0034] To improve heat conduction efficiency, a heat-conducting seat 16 is fixedly connected to the upper wall of the semiconductor cooling component 9 and inside the mounting cavity 601. A heat-conducting column 3 is provided on the upper wall of the heat-conducting seat 16. The end of the heat-conducting column 3 away from the heat-conducting seat 16 penetrates the lower wall of the milk container 2 and extends into the interior of the milk container 2. The length of the heat-conducting column 3 extending into the interior of the milk container 2 is two-thirds of the axial length of the milk container 2. The heat-conducting column 3 is shaped like a frustum of a cone, and the outer diameter of the end away from the heat-conducting seat 16 is smaller than that of the end close to the heat-conducting seat 16. Multiple sets of protruding ribs 301 are provided on the outer peripheral wall of the heat-conducting column 3 inside the milk container 2. The multiple sets of protruding ribs 301 are evenly distributed in a circle with the axis of the heat-conducting column 3 as the center. The top view projection of the protruding ribs 301 is semi-circular, and the radius of the semi-circular protruding ribs 301 is 1.5-2mm. The heat-conducting seat 16 and the heat-conducting column 3 are integrally formed, and the surface roughness Ra of the heat-conducting column 3 is ≤1.6μm.

[0035] The heat-conducting column 3 adopts a truncated cone design that extends to two-thirds of the length of the milk container 2, which can concentrate the heat flux density and achieve rapid heating; multiple sets of convex ridges 301 on its surface are evenly distributed around the circumference; the convex ridges 301 greatly increase the heat transfer area, and at the same time, the heat condensed by the convex ridges 301 diffuses radially, reducing the temperature difference between the wall of the heat-conducting column 3 and the far end, and avoiding local overheating of the milk.

[0036] To address the sealing failure caused by thermal expansion, a fastening nut 4 is threaded onto the outer wall of one end of the heat-conducting column 3 that extends into the milk container 2, which is used to press the milk container 2 and the insulation layer 6 together. A sealing gasket 5 is provided between the milk container 2 and the heat-conducting base 16 for sealing.

[0037] The sealing gasket 5 is made of food-grade silicone rubber with a thickness of 2±0.1mm. When the fastening nut 4 is tightened, the compression rate of the sealing gasket 5 is controlled within the range of 18-22%, which achieves a better sealing state and effectively solves the sealing failure caused by thermal expansion.

[0038] To meet food safety standards, the sealing gasket 5 is a food-grade silicone rubber sealing gasket, and the heat-conducting column 3 and the fastening nut 4 are both food-grade stainless steel.

[0039] Through the above settings, the milk warmer meets food safety requirements and has a low amount of heavy metal leaching.

[0040] To optimize the heat conduction path, the heat conduction base 16 is rectangular in plan view and its plan view area is the same as that of the semiconductor cooling component 9. The heat conduction base 16 and the semiconductor cooling component 9, as well as the semiconductor cooling component 9 and the heat sink 10, are connected by thermally conductive silicone.

[0041] The space between the heat-conducting base 16 and the semiconductor cooling component 9 is filled with 0.1mm thick thermally conductive silicone, which has high thermal conductivity.

[0042] In order to achieve temperature control accuracy, a temperature controller 11 is fixedly connected to the front wall of the heat sink 10, and a protective cover 12 is fixedly connected to the front wall of the heat sink 10 and outside the temperature controller 11. A power cord 13 for connecting to the power supply is provided on the front wall of the protective cover 12.

[0043] The temperature controller 11 can detect the temperature through its internal temperature sensor and avoid temperature fluctuations through a PID algorithm.

[0044] Working principle: The heat sink 10 and the cooling fan 14 are rigidly connected by four sets of second bolts 15. Two sets of slots 602 within the mounting cavity 601 engage with the fixing post 7 to form a double positioning system. This structure ensures efficient heat dissipation while eliminating vibration risks through the threaded connection of the first bolt 8 and the screw through-hole 701. The heat-conducting post 3 adopts a truncated cone design extending to two-thirds of the length of the milk container 2, concentrating heat flux density for rapid heating. Multiple sets of convex ridges 301 are evenly distributed circumferentially on its surface. These ridges significantly increase the heat transfer area, and the heat absorbed by the ridges diffuses radially, reducing the temperature difference between the wall and the far end of the heat-conducting post 3, preventing localized overheating of the milk. The sealing gasket 5 is made of food-grade silicone rubber, with a thickness of... Designed to be 2±0.1mm, when the fastening nut 4 is tightened, the compression rate of the sealing gasket 5 is controlled within the range of 18-22%, achieving a better sealing state and effectively solving the sealing failure caused by thermal expansion; the heat-conducting column 3 and the fastening nut 4 are made of food-grade stainless steel, meeting food safety requirements; the space between the heat-conducting seat 16 and the semiconductor cooling component 9 is filled with 0.1mm thick thermally conductive silicone, resulting in high heat conduction efficiency; the temperature controller 11 can detect the temperature through its internal temperature sensor and avoid temperature fluctuations through a PID algorithm.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A milk warmer, characterized in that: The device includes a semiconductor cooling component (9) and a milk container (2). The lower wall of the semiconductor cooling component (9) is provided with a heat sink (10), and the lower wall of the heat sink (10) is provided with a cooling fan (14). The upper wall of the heat sink (10) is provided with a heat insulation layer (6), and the inner side wall of the heat insulation layer (6) is provided with a mounting cavity (601). The semiconductor cooling component (9) is located inside the mounting cavity (601). A heat-conducting seat (16) is fixedly connected to the upper wall of the semiconductor cooling component (9) and inside the mounting cavity (601). A heat-conducting column (3) is provided on the upper wall of the heat-conducting seat (16). The heat-conducting column (3) is located away from the heat-conducting seat (1). One end of the heat-conducting column (3) penetrates the lower wall of the milk bucket (2) and extends into the inside of the milk bucket (2). The length of the heat-conducting column (3) extending into the inside of the milk bucket (2) is two-thirds of the axial length of the milk bucket (2). The outer wall of the end of the heat-conducting column (3) extending into the inside of the milk bucket (2) is threaded with a fastening nut (4) for pressing the milk bucket (2) and the insulation layer (6). A sealing gasket (5) for sealing is provided between the milk bucket (2) and the heat-conducting seat (16). The upper end of the milk bucket (2) is threaded with a top cover (1). The sealing gasket (5) is a food-grade silicone rubber sealing gasket. The heat-conducting column (3) and the fastening nut (4) are both food-grade stainless steel.

2. A milk warmer according to claim 1, characterized in that: The heat-conducting column (3) is shaped like a frustum cone, and the outer diameter of the end away from the heat-conducting base (16) is smaller than that of the end near the heat-conducting base (16). The outer peripheral wall of the heat-conducting column (3) inside the milk bucket (2) is provided with multiple sets of protrusions (301). The multiple sets of protrusions (301) are distributed in a circle with the axis of the heat-conducting column (3) as the center. The top view projection of the protrusions (301) is semi-circular, and the radius of the semi-circular protrusions (301) is 1.5-2mm.

3. A milk warmer according to claim 1, characterized in that: The heat-conducting base (16) and the heat-conducting column (3) are integrally formed, and the surface roughness Ra of the heat-conducting column (3) is ≤1.6μm.

4. A milk warmer according to claim 1, characterized in that: The heat-conducting base (16) has a rectangular top view projection and its top view projection area is consistent with the top view projection area of ​​the semiconductor cooling component (9).

5. A milk warmer according to claim 1, characterized in that: The heat-conducting base (16) and the semiconductor cooling component (9) are connected by thermally conductive silicone.

6. A milk warmer according to claim 1, characterized in that: The mounting cavity (601) has a set of slots (602) on its inner left and right walls. The heat-conducting seat (16) has a mounting hole (1601) that runs through its body in a left-right direction on its inner wall. A fixing post (7) is fixedly connected to the inner wall of the mounting hole (1601). The left and right ends of the fixing post (7) extend toward the left and right sides of the heat-conducting seat (16). When the heat-conducting seat (16) is assembled with the mounting cavity (601), the two ends of the fixing post (7) that extend to the outer wall of the heat-conducting seat (16) are respectively engaged with a set of slots (602). The inner walls of the two ends of the fixing post (7) that extend to the outer wall of the heat-conducting seat (16) are provided with screw through holes (701). The inner wall of the screw through hole (701) is provided with a first bolt (8). The first bolt (8) passes through the screw through hole (701) and is threadedly connected to the heat sink (10).

7. A milk warmer according to claim 1, characterized in that: The cooling fan (14) is fixedly connected to the heat sink (10) by four sets of second bolts (15).

8. A milk warmer according to claim 1, characterized in that: A thermostat (11) is fixedly connected to the front wall of the heat sink (10), and a protective cover (12) is fixedly connected to the front wall of the heat sink (10) and outside the thermostat (11). A power cord (13) for connecting to a power source is provided on the front wall of the protective cover (12).

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