Vacuum heat preservation pot

Abstract

A vacuum heat preservation pot comprises a pot body and a pot cover, the pot body is formed by welding a thick pot body and a stainless steel shell, the thick pot body is formed by stretching an aluminum / stainless steel double-layer composite board, aluminum serves as an inner layer, stainless steel serves as an outer layer, and the stainless steel shell is welded and fixed to the outer side of the thick pot body. The lower end of the stainless steel shell is basically flush with the bottom face of the thick pot body in a transition mode, the upper end of the stainless steel shell is located below the pot edge, and a sealed vacuum layer is formed between the stainless steel shell and the outer side wall of the thick pot body after the stainless steel shell and the outer layer stainless steel of the thick pot body are welded. The vacuum pot has the advantages of being reasonable in structural design, fast in heating, good in heat preservation performance, simple in manufacturing process, high in production efficiency, capable of achieving multifunctional operation such as braising, steaming and boiling, capable of effectively reducing energy consumption and saving cooking time and good in practical performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat preservation pots and relates to a vacuum heat preservation pot, in particular to a vacuum heat preservation pot and a preparation method thereof. Background Art

[0002] As a heat preservation pot, the vacuum pot has a good heat preservation effect and can be used for stewing, steaming and keeping food warm. Most existing vacuum pots have an inner and outer two-layer structure. This structure has a strong heat preservation ability, but the heat source cannot directly transfer heat to the inner pot, resulting in an unsatisfactory temperature increase speed in the pot and a long cooking time. Another method is to set a vacuum heat preservation sleeve outside the pot body to achieve the heat preservation effect.

[0003] After investigation, the existing Chinese patent number CN202020059228.9 "A heatable vacuum insulation pot" includes a pot body, a pot lid and a base, and is characterized in that: the pot body includes an aluminum pot body that can be heated directly on the stove, a vacuum stainless steel insulation ring and a handle ring, the vacuum stainless steel insulation ring is covered on the outer periphery of the aluminum pot body, and the lower end of the vacuum stainless steel insulation ring is at a certain distance from the bottom of the aluminum pot body. The pot lid is a vacuum stainless steel lid, and the base is a vacuum stainless steel insulation bottom. A circular groove is formed on the base for the bottom of the aluminum pot body to be placed. When the pot body is heated and placed on the base, the lower end of the vacuum stainless steel insulation ring corresponds exactly to the upper outer circle of the base. This structure has a vacuum stainless steel insulation ring outside the pot body, which improves the insulation effect, but the insulation effect is not ideal enough. Its defects are: 1. There is a certain distance between the lower end of the vacuum stainless steel insulation ring and the bottom of the aluminum pot body. When the bottom is heated, the heat will be dissipated from the side; 2. The vacuum stainless steel insulation ring is sleeved on the pot body through the cooperation of convex ribs and concave ribs, and there is a gap between the vacuum stainless steel insulation ring and the pot body. Heat will also be dissipated from the gap, affecting the insulation effect; 3. The vacuum stainless steel insulation ring and the pot body are sleeved through the cooperation of convex ribs and concave ribs. The connection between the two is not stable and firm enough. If it is collided or squeezed, it is easy to cause the vacuum stainless steel insulation ring to fall off, affecting normal use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vacuum heat preservation pot with reasonable structure and good heat preservation performance in view of the above technical status quo, which has the characteristics of fast heating and convenient processing.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a vacuum insulation pot, including a pot body and a pot cover, characterized in that: the pot body is welded by a rough pot body and a stainless steel shell, the rough pot body is formed by stretching an aluminum / stainless steel double-layer composite plate, wherein the aluminum is an inner layer and the stainless steel is an outer layer, the stainless steel shell is welded and fixed to the outer side of the rough pot body, the lower end of the stainless steel shell transitions to be basically flush with the bottom surface of the rough pot body, the upper end of the stainless steel shell is located below the pot edge, and after the stainless steel shell is welded to the outer stainless steel layer of the rough pot body, a sealed vacuum layer is formed between the stainless steel shell and the outer wall of the rough pot body.

[0006] As an improvement, the upper end of the rough pot body is formed with a step that expands outward for the pot cover to rest on, the stainless steel shell is an arc-shaped shell that cooperates with the rough pot body, the middle part of the stainless steel shell is formed with a circular hollow part corresponding to the bottom surface of the rough pot body, the stainless steel shell is sleeved outside the rough pot body, the lower end of the stainless steel shell is welded and fixed to the outer periphery of the bottom surface of the rough pot body, and the upper end of the stainless steel shell is welded and fixed to the outer side wall of the expanded step.

[0007] Furthermore, pot ears are formed on the left and right sides of the upper end surface of the rough pot body, and an exhaust hole is opened on the side of the stainless steel shell. When the stainless steel shell and the rough pot body are welded and fixed, vacuum is drawn from the exhaust hole and then sealed with melted glass beads.

[0008] Furthermore, the pot cover is a vacuum double-layer stainless steel cover formed by welding a pot cover outer shell and a pot cover inner liner. An opening is provided at the center of the pot cover outer shell, and the dripper is installed at the position of the opening and welded and sealed with the pot cover or sealed.

[0009] Furthermore, the vacuum insulation pot also includes an insulation base, which is a vacuum stainless steel base welded by a base shell and a base liner. A circular groove is formed on the insulation base for the bottom of the pot body to be placed in, and reinforcing ribs are formed on the base shell and the base liner at positions corresponding to the circular groove.

[0010] Finally, the inner aluminum layer of the rough pot body has a thickness of 1.3±0.1mm, the outer stainless steel layer uses 430 stainless steel with a thickness of 0.5±0.05mm, and the thickness of the stainless steel outer shell, pot lid outer shell, pot lid liner, base outer shell and base liner is 0.5±0.05mm.

[0011] Compared with the prior art, the utility model has the following advantages: the coarse pot body adopts aluminum / stainless steel double-layer composite sheet, with aluminum as the inner layer and stainless steel as the outer layer, and the outer shell adopts stainless steel sheet, so that the stainless steel outer shell and the outer stainless steel material of the coarse pot body are consistent, and after welding, there will be no cracking or desoldering due to the creep caused by different thermal expansion coefficients of the materials; the outer shell completely covers the sides of the coarse pot body, and after vacuuming, the heat is not easy to dissipate, the heating is faster, a lot of energy can be saved, and a better insulation effect can be achieved; the pot cover adopts a vacuum stainless steel cover, which has good insulation performance and heat will not be dissipated through the cover; an insulation base is set, and the pot body is directly placed on the insulation base after heating, and the circular groove placed at the bottom of the pot body prevents heat from being dissipated from the bottom, so that the heat is always kept inside the coarse pot body; the coarse pot body, stainless steel outer shell, pot cover and insulation base all adopt stretching process, which is convenient for forming and has high production efficiency. The vacuum pot of the utility model has reasonable structural design, has the characteristics of fast heating and good insulation performance, and at the same time, the preparation process is simple and the production efficiency is high. The vacuum pot can realize multi-functional operations such as steaming, boiling, etc., effectively reduces energy consumption, saves cooking time, and has good practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 for Figure 1 A cross-sectional view of

[0014] Figure 3 It is a three-dimensional structural schematic diagram of the rough pot body of the utility model;

[0015] Figure 4 for Figure 3 Exploded diagram of

[0016] Figure 5 It is a flow chart for the preparation of the rough pot body;

[0017] Figure 6 The figure is a flow chart for preparing the stainless steel shell;

[0018] Figures 7a to 7c A schematic diagram of the structure for vacuuming the rough pot body and the stainless steel shell for welding and positioning;

[0019] Figure 8 The present invention is a flow chart for preparing the pot cover shell;

[0020] Fig. 9 The present invention is a flow chart for preparing the pot lid liner;

[0021] Fig.10 A schematic diagram of the structure for welding and positioning the pot cover shell and the pot cover inner pot to evacuate the pot cover;

[0022] Fig.11 A flow chart for the preparation of the base shell;

[0023] Fig.12 The figure is a flow chart for preparing the base liner;

[0024] Fig.13 Schematic diagram of the vacuum structure for welding the base shell and the base liner. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 4 As shown, a vacuum insulation pot comprises a rough pot body 1, a stainless steel shell 2, a pot cover 3 and an insulation base 4. The rough pot body 1 is made of an aluminum / stainless steel double-layer composite plate by stretching, wherein the aluminum is the inner layer and the stainless steel is the outer layer. The stainless steel shell 2 is welded and sleeved on the outer side of the rough pot body 1. The lower end of the stainless steel shell 2 transitions to be basically flush with the bottom surface of the rough pot body 1, that is, the height error between the two is within 15%, so that they are roughly flush. The upper end of the stainless steel shell 2 is located below the pot edge. After the stainless steel shell 2 is welded to the outer stainless steel layer of the rough pot body 1, a sealed vacuum layer 10 is formed between the stainless steel shell 2 and the outer wall of the pot body 1, thereby making a pot body A1.

[0027] The specific structure is as follows: the upper end of the rough pot body 1 is formed with a step 11 that expands outwards for the pot cover 3 to rest on, the stainless steel shell 2 is an arc-shaped shell that matches the rough pot body 1, and the middle part of the stainless steel shell 2 is formed with a circular hollow part 21 corresponding to the bottom surface of the rough pot body 1, the stainless steel shell 2 is sleeved outside the rough pot body 1, the lower end of the stainless steel shell 2 is welded and fixed to the outer periphery of the bottom surface of the rough pot body 1, and the upper end of the stainless steel shell 2 is welded and fixed to the outer side wall of the expanded step 11. Pot ears 12 are formed on the left and right sides of the upper end surface of the rough pot body 1, and an exhaust hole 22 is opened on the side of the stainless steel shell 2. When the stainless steel shell 2 and the rough pot body 1 are welded and fixed, vacuum is drawn from the exhaust hole 22, and then the glass beads are melted and sealed.

[0028] The pot cover 3 is a vacuum double-layer stainless steel cover formed by welding a pot cover outer shell 31 and a pot cover liner 32. An opening 311 is provided at the center of the pot cover outer shell 21. The dripper 30 is installed at the position of the opening 311 and welded and sealed with the pot cover 3. Of course, the dripper 30 can be directly welded at the position of the opening 311, or a bolt can be welded at the position of the opening 311 and then the dripper 30 can be installed on the bolt.

[0029] The heat-insulating base 4 is a vacuum stainless steel base welded by a base shell 41 and a base liner 42. A circular groove 44 is formed on the heat-insulating base 4 for the bottom of the pot body A1 to be placed in. Reinforcing ribs 43 are formed on the base shell 41 and the base liner 42 at positions corresponding to the circular grooves.

[0030] In this embodiment, the inner aluminum layer of the rough pot body 1 is 1.3 mm thick, the outer stainless steel layer is 430 stainless steel with a thickness of 0.5 mm, and the thickness of the stainless steel shell 2, the pot cover shell 31, the pot cover liner 32, the base shell 41 and the base liner 42 is 0.5±0.05 mm.

[0031] The following is a method for preparing the above-mentioned vacuum insulation pot, and the process flow is as follows: Figures 5 to 13 As shown, the following steps are included:

[0032] 1) Preparation of pot body A1:

[0033] 1) Preparation of rough pot body 1 (such as Figure 5 ): The aluminum / stainless steel double-layer composite sheet A is cut into a circle, formed and stretched, and then edged, and cut into the shape of pot ears 11 on the left and right sides;

[0034] 2) Preparation of stainless steel housing 2 (eg Figure 6 ): The stainless steel plate B is cut into a circle, formed and stretched, and then a circular hollow 21 is cut out in the middle and a hole 22 is punched on the side;

[0035] 3) The stainless steel shell 2 is set outside the rough pot body 1 and fixed to the outer stainless steel layer of the rough pot body 1 by laser welding, such as Figure 7a ;

[0036] 4) Then evacuate the vacuum, and seal it with melted glass beads. Figure 7b ;

[0037] 5) Spray ceramic paint, such as Figure 7c ;

[0038] 2) Preparation of pot cover 3:

[0039] a. Preparation of pot cover shell 31 (such as Figure 8 ): The stainless steel plate C is rounded, formed and stretched, then trimmed, and a hole 311 is punched in the middle;

[0040] b. Preparation of pot lid liner 32 (such as Fig. 9 ): Stainless steel sheet C rounding, forming stretching, trimming;

[0041] c. Align the pot cover shell 31 and the pot cover liner 22, weld them and fix them, evacuate them, and then laser weld the dripper 30 to seal them. Fig.10 ;

[0042] 3) Preparation of insulation base 4:

[0043] A. Preparation of base shell 41 (eg Fig.11 ): The stainless steel plate D is rounded, formed and stretched, then trimmed, and a hole 411 is punched in the middle;

[0044] B. Preparation of base liner 42 (eg Fig.12): Stainless steel sheet D rounding, forming stretching, trimming;

[0045] C. Align the base shell 41 and the base liner 42, then fix them by laser welding, evacuate them, and seal them by melting glass beads. Fig.13 .

[0046] The rough pot body 1 of this embodiment adopts aluminum / stainless steel double-layer composite plate A, with aluminum as the inner layer and stainless steel as the outer layer, and the stainless steel shell 2 adopts stainless steel plate B, so that the stainless steel shell 2 of the pot body is made of the same material as the stainless steel outer layer of the rough pot body 1, and after welding, there will be no cracking or desoldering due to creep caused by different thermal expansion coefficients of the materials; the stainless steel shell 2 completely covers the sides of the rough pot body 1, and after vacuuming, heat is not easy to dissipate, heating is faster, a lot of energy can be saved, and better insulation effect can be achieved; the pot cover 3 adopts a vacuum stainless steel cover, the middle of the pot cover 3 is in a vacuum state, the insulation performance is good, and heat will not be dissipated through the pot cover 3; an insulation base 4 is provided, and the pot body A1 is directly placed on the insulation base after heating. The circular groove at the bottom of the pot body A1 prevents heat from dissipating from the bottom, so that the heat is always kept inside the rough pot body 1 and is not easy to dissipate; the rough pot body 1, the stainless steel shell 2, the pot cover 3 and the insulation base 4 all adopt a stretching process, which is convenient for molding and has high production efficiency

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum heat preservation pot, comprising a pot body and a pot cover, characterized in that: The pot body is welded together by a rough pot body and a stainless steel outer shell. The rough pot body is formed by stretching an aluminum / stainless steel double-layer composite plate, in which aluminum is an inner layer and stainless steel is an outer layer. The stainless steel outer shell is welded and fixed to the outer side of the rough pot body. The lower end of the stainless steel outer shell transitions to be basically flush with the bottom surface of the rough pot body. The upper end of the stainless steel outer shell is located below the pot edge. After the stainless steel outer shell is welded to the outer layer of stainless steel of the rough pot body, a sealed vacuum layer is formed between the stainless steel outer shell and the outer wall of the rough pot body.

2. The vacuum insulation pot according to claim 1, characterized in that: The upper end of the rough pot body is formed with a step that expands outward for the pot cover to rest on. The stainless steel shell is an arc-shaped shell that matches the rough pot body. The middle part of the stainless steel shell is formed with a circular hollow part corresponding to the bottom surface of the rough pot body. The stainless steel shell is sleeved outside the rough pot body. The lower end of the stainless steel shell is welded and fixed to the outer periphery of the bottom surface of the rough pot body, and the upper end of the stainless steel shell is welded and fixed to the outer side wall of the expanded step.

3. The vacuum insulation pot according to claim 2, characterized in that: The upper end surface of the rough pot body is formed with pot ears on both sides, and the side of the stainless steel shell is provided with an exhaust hole. After the stainless steel shell and the rough pot body are welded and fixed, vacuum is drawn from the exhaust hole and then sealed with melted glass beads.

4. The vacuum insulation pot according to claim 1, characterized in that: The pot cover is a vacuum double-layer stainless steel cover formed by welding a pot cover outer shell and a pot cover inner liner. An opening is arranged at the center of the pot cover outer shell. The dripper is installed at the position of the opening and welded to the pot cover for sealing or sealing installation.

5. The vacuum insulation pot according to claim 1, characterized in that: The utility model also comprises a heat-insulating base, which is a vacuum base formed by welding a base shell and a base liner, and a circular groove for placing the bottom of the pot body is formed on the heat-insulating base.

6. The vacuum insulation pot according to claim 5, characterized in that: The heat-insulating base is made of stainless steel, and reinforcing ribs are formed on the base shell and the base inner container at positions corresponding to the circular grooves.

7. The vacuum insulation pot according to claim 6, characterized in that: The inner aluminum layer of the rough pot body has a thickness of 1.3±0.1mm, the outer stainless steel layer is 430 stainless steel with a thickness of 0.5±0.05mm, and the thickness of the stainless steel outer shell, pot lid outer shell, pot lid liner, base outer shell and base liner is 0.5±0.05mm.

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