A thermostatic cookware and its manufacturing method

Abstract

A constant-temperature cookware and its manufacturing method are disclosed. The cookware includes a pot body comprising, from the inside out, a stainless steel inner plate, a middle plate, and an outer plate composited with the middle plate. The outer plate also has several raised sections forming a channel network with the middle plate. A heat-conducting liquid is disposed within the channel network. Depressions are formed in the areas of the outer plate where no channel network exists. In use, the constant-temperature inner pot of this invention is the same as that of existing inner pots. This invention also relates to a flat-bottomed pan and a saucepan using the same structural materials; their usage methods are the same as existing flat-bottomed pans and saucepans, and will not be described in detail here.

Description

Technical Field

[0001] This invention relates to an improvement of a cookware. Background Technology

[0002] An electric rice cooker, also known as a rice cooker or rice pot, is an easy-to-use cooking appliance that uses electrical energy to convert it into internal energy.

[0003] It is clean and hygienic, and has the ability to steam, boil, and cook porridge, making it a common household appliance.

[0004] The invention of the rice cooker has reduced the time many families spend cooking rice. Rice is the main cooking ingredient for rice and porridge.

[0005] As living standards improve, the demand for food also increases.

[0006] The inner pot of a rice cooker in the current technology has the problem that, because it is made of metal, it conducts heat relatively quickly, but its heat retention is insufficient.

[0007] For cooking porridge, since the cooking time is relatively long, the heat preservation performance of the rice cooker is also a very important factor. A rice cooker with poor heat preservation needs to keep starting the electric heating element during the heat preservation stage, consuming a lot of energy and increasing power consumption. Summary of the Invention

[0008] In order to overcome the shortcomings of poor heat preservation performance and high power consumption of current rice cooker inner pots, this invention provides a constant temperature cooker with good heat preservation performance and its manufacturing method.

[0009] The technical solution of the present invention to solve its technical problem is: a constant temperature cooker, including a pot body, wherein the pot body consists of a stainless steel inner plate, a middle plate and an outer plate composited on the middle plate from the inside out, and the outer plate is provided with a number of bulges, the bulges and the middle plate forming a channel network, the channel network being provided with heat-conducting liquid, and the positions on the outer plate where there is no channel network forming a recess.

[0010] A type of pot body, said pot body being an insulated inner pot for use in a rice cooker.

[0011] Another type of pot body, which is a soup pot.

[0012] Another option for the pot body is a flat-bottomed pan.

[0013] One option for the pattern is that the recessed shape is a square with rounded corners.

[0014] A pattern placement option, wherein the recessed shape is hexagonal and located on the edge of a soup pot.

[0015] Another option is to position the pattern in a hexagonal shape on the bottom of the pan.

[0016] The present invention also includes a method for manufacturing a constant temperature cookware.

[0017] Including the following methods:

[0018] a. Roughen the inner contact surfaces of the aluminum middle plate and the aluminum outer plate.

[0019] b. Graphite lines are formed on one of the roughened surfaces of the middle plate and the outer plate using graphite printing, and the process lines made by graphite printing are reserved along the upper edge.

[0020] c. Attach the inner and middle stainless steel plates with the printed graphite lines to the roughened outer plate and align the three sides.

[0021] d. The laminated inner, middle, and outer panels are placed in a heating furnace for heating and hot rolling to form a three-layer composite board;

[0022] e. Place the three-layer composite board on the mold and press and stretch it to form the pot body;

[0023] f. Drill countersunk holes at the process lines on the upper side of the pot body to form process holes;

[0024] g. Place the pot body on a molding mold, and then inflate the process holes of the pot body to make the graphite circuit expand along the outer plate, forming a pot body with a completely flat middle plate and an outward bulging channel network on the outer plate.

[0025] H. Cut off the waste material with process holes around the edge of the pot body;

[0026] I. Connect aluminum injection process pipe to the process line and inject heat-conducting fluid into the graphite line;

[0027] J. Cut off the aluminum injection process pipe at the flash and the raised edge at that location, and weld it to prevent the heat transfer fluid from leaking out.

[0028] Step K is included after step J, which cleans the exposed surface of the pot body and removes burrs and flash.

[0029] A simplified option for the steps, wherein steps d and e are combined into: the bonded inner plate, middle plate, and outer plate are placed on a mold and stamped and stretched to form a pot body.

[0030] When using this invention, the constant temperature inner pot of this rice cooker can be used in the same way as the inner pot of the prior art. This invention also relates to a flat-bottomed pan and a soup pot using the same structural materials. The method of use is the same as that of existing flat-bottomed pans and soup pots, and will not be described in detail here.

[0031] The beneficial effects of this invention are as follows: 1. The double-layer heat pack with a cavity and bulging structure doubles the heat storage and greatly improves heat preservation. 2. The constant temperature cookware uses a channel network with heat-conducting fluid inside, which can store heat during heating and dissipate this heat during the heat preservation stage, thereby increasing heat preservation performance and reducing power consumption during the heat preservation stage. 3. The innermost stainless steel inner plate has excellent structural strength and rust resistance, and is very easy to clean. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the heat-insulating inner liner of the present invention.

[0033] Figure 2 This is a schematic diagram of the heat-insulating inner liner of the present invention.

[0034] Figure 3 This is a cross-sectional schematic diagram of the heat-insulating inner liner of the present invention.

[0035] Figure 4 yes Figure 3 Enlarged diagram of point A in the diagram.

[0036] Figure 5 This is a schematic diagram showing the three layers of the insulated inner liner: the stainless steel inner plate, the middle plate, and the outer plate, after separation.

[0037] Figure 6 This is a schematic diagram of the soup pot of the present invention.

[0038] Figure 7 This is a schematic diagram of the frying pan of the present invention.

[0039] Figure 8 This is a schematic diagram of the back of the frying pan of the present invention. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] Combined with appendix Figures 1 to 5 A constant temperature cooker includes a pot body serving as an insulated inner liner. The insulated inner liner consists of a stainless steel inner plate 1, a middle plate 2, and an outer plate 3 composited on the middle plate 2 from the inside out. The outer plate 3 is also provided with a number of bulges. The bulges and the middle plate 2 form a channel network 4. The channel network 4 is provided with a heat-conducting liquid. The outer plate 3 has recesses 5 at the positions where the channel network 4 is not provided.

[0043] The pot body is selected as an insulated inner liner.

[0044] The middle and outer plates are made of aluminum.

[0045] Alternatively, the thickness of the middle plate 2 is greater than that of the outer plate 3.

[0046] One option is to create a grid of bulges that intersect each other.

[0047] A recess 5 has a shape that is a square with rounded corners.

[0048] The grid is selected, and the grid is divided into a uniform part 6 on the periphery and a gradient part 7 on the bottom surface. The gradient part 7 on the bottom surface has a larger indentation 5 closer to the periphery.

[0049] To facilitate bottom heating, the center of the bottom surface 8 of the inner liner is not bulged.

[0050] When using this invention, the heat-insulating inner liner can be used in the same way as the inner liner of the prior art. This invention also relates to a flat-bottomed pan and a soup pot using the same structural materials. The method of use is the same as that of existing flat-bottomed pans and soup pots, and will not be described in detail here.

[0051] The beneficial effects of this invention are as follows: 1. The double-layer heat pack with a cavity and bulging structure doubles the heat storage and greatly improves heat preservation. 2. The constant temperature cookware uses a channel network with heat-conducting fluid inside, which can store heat during heating and dissipate this heat during the heat preservation stage, thereby increasing heat preservation performance and reducing power consumption during the heat preservation stage. 3. The innermost stainless steel inner plate has excellent structural strength and rust resistance, and is very easy to clean.

[0052] Example 2

[0053] Combined with appendix Figure 6 A constant temperature cooker includes a pot body, which consists of a stainless steel inner plate, a middle plate, and an outer plate composited on the middle plate from the inside out. The outer plate is also provided with a number of bulges, which form a channel network with the middle plate. The channel network is provided with heat-conducting liquid, and the positions on the outer plate where there is no channel network are formed with recesses.

[0054] The pot is a soup pot.

[0055] A pattern placement option, wherein the recess 5 is hexagonal in shape and located on the edge 9 of the soup pot.

[0056] The usage method is the same as that of existing soup pots, and will not be repeated here.

[0057] The beneficial effects of this invention are as follows: 1. The double-layer heat pack with a cavity and bulging structure doubles the heat storage and greatly improves heat preservation. 2. The constant temperature cookware uses a channel network with heat-conducting fluid inside, which can store heat during heating and dissipate this heat during the heat preservation stage, thereby increasing heat preservation performance and reducing power consumption during the heat preservation stage. 3. The innermost stainless steel inner plate has excellent structural strength and rust resistance, and is very easy to clean.

[0058] Example 3

[0059] Combined with appendix Figure 7 and 8 A constant temperature cooker includes a pot body, which consists of a stainless steel inner plate, a middle plate, and an outer plate composited on the middle plate from the inside out. The outer plate is also provided with a number of bulges, which form a channel network with the middle plate. The channel network is provided with heat-conducting liquid, and the positions on the outer plate where there is no channel network are formed with recesses.

[0060] The pot body is a flat-bottomed pan.

[0061] Another option for the pattern's location is that the recess 5 is hexagonal in shape and located on the bottom 10 of the pan.

[0062] The usage method is the same as that of existing frying pans, and will not be repeated here.

[0063] The beneficial effects of this invention are as follows: 1. The double-layer heat pack with a cavity and bulging structure doubles the heat storage and greatly improves heat preservation. 2. The constant temperature cookware uses a channel network with heat-conducting fluid inside, which can store heat during heating and dissipate this heat during the heat preservation stage, thereby increasing heat preservation performance and reducing power consumption during the heat preservation stage. 3. The innermost stainless steel inner plate has excellent structural strength and rust resistance, and is very easy to clean.

[0064] Example 4

[0065] Combined with appendix Figure 2 and 5 A method for manufacturing a constant temperature cookware.

[0066] Including the following methods:

[0067] a. Roughen the inner contact surfaces of the aluminum middle plate 2 and the aluminum outer plate 3.

[0068] b. Graphite lines are formed on one of the roughened surfaces of the middle plate 2 and the outer plate 3 using graphite printing, and the process lines made by graphite printing are reserved along the upper edge.

[0069] c. Attach the inner stainless steel plate and the side of the middle plate 2 with the printed graphite lines to the roughened side of the outer plate 3 and align the three sides.

[0070] d. The laminated inner panel 1, middle panel 2, and outer panel 3 are placed in a heating furnace and heated at a temperature of 450-500°C. After hot rolling, a three-layer composite board is formed.

[0071] e. Place the three-layer composite board on the mold and press and stretch it to form the pot body;

[0072] f. Drill countersunk holes at the process lines on the upper side of the pot body to form process holes;

[0073] g. Place the pot body on a molding mold, and then inflate the process hole of the pot body to make the graphite circuit expand along the outer plate 3, forming a pot body with the middle plate 2 completely flat and the channel network 4 on the outer plate 3 bulging outward.

[0074] H. Cut off the waste material with process holes around the edge of the pot body 11;

[0075] I. Connect aluminum injection process pipe to the process line and inject heat-conducting fluid into the graphite line;

[0076] J. Cut off the aluminum injection process pipe at the flash and the raised edge at that location, and weld it to prevent the heat transfer fluid from leaking out.

[0077] K. Clean the exposed surfaces of the pot body to remove burrs and rough edges.

[0078] When using this invention, the constant temperature cooker can be used in the same way as cookers in the prior art, and will not be described in detail here.

[0079] The beneficial effects of this invention are as follows: 1. The double-layer heat pack with a cavity and bulging structure doubles the heat storage and greatly improves heat preservation. 2. The pot body adopts a channel network with heat-conducting fluid inside, which can store heat during the heating process and dissipate this heat during the heat preservation stage, thereby increasing heat preservation performance and reducing power consumption during the heat preservation stage. 3. The innermost stainless steel inner plate has very good structural strength and rust resistance, and is very easy to clean.

[0080] Example 5

[0081] Combined with appendix Figure 2 and 5 A method for manufacturing a constant temperature cookware.

[0082] Including the following methods:

[0083] a. Roughen the inner contact surfaces of the aluminum middle plate 2 and the aluminum outer plate 3.

[0084] b. Graphite lines are formed on one of the roughened surfaces of the middle plate 2 and the outer plate 3 using graphite printing, and the process lines made by graphite printing are reserved along the upper edge.

[0085] c. Attach the inner stainless steel plate and the side of the middle plate 2 with the printed graphite lines to the roughened side of the outer plate 3 and align the three sides.

[0086] d. The inner plate, middle plate 2, and outer plate 3, after being bonded together, are placed into a mold and stamped and stretched to form the pot body;

[0087] f. Drill countersunk holes at the process lines on the upper side of the pot body to form process holes;

[0088] g. Place the pot body on a molding mold, and then inflate the process hole of the pot body to make the graphite circuit expand along the outer plate 3, forming a pot body with the middle plate 2 completely flat and the channel network 4 on the outer plate 3 bulging outward.

[0089] H. Cut off the waste material with process holes around the edge of the pot body 11;

[0090] I. Connect aluminum injection process pipe to the process line and inject heat-conducting fluid into the graphite line;

[0091] J. Cut off the aluminum injection process pipe at the flash and the raised edge at that location, and weld it to prevent the heat transfer fluid from leaking out.

[0092] A simplified approach involves placing the bonded inner plate, middle plate 2, and outer plate 3 into a mold and stamping and stretching them to form the pot body.

[0093] When using this invention, the constant temperature cooker can be used in the same way as cookers in the prior art, and will not be described in detail here.

[0094] The beneficial effects of this invention are as follows: 1. The double-layer heat pack with a cavity and bulging structure doubles the heat storage and greatly improves heat preservation. 2. The pot body adopts a channel network with heat-conducting fluid inside, which can store heat during the heating process and dissipate this heat during the heat preservation stage, thereby increasing heat preservation performance and reducing power consumption during the heat preservation stage. 3. The innermost stainless steel inner plate has very good structural strength and rust resistance, and is very easy to clean.

Claims

1. A thermostatic cookware, characterized in that: The device includes a pot body, which consists of a stainless steel inner plate, a middle plate, and an outer plate composited with the middle plate from the inside out. The outer plate is also provided with several bulges, which together with the middle plate form a channel network. The channel network contains heat-conducting liquid, and the areas on the outer plate without the channel network are recessed.

2. The constant temperature cooker according to claim 1, characterized in that: The pot body is an insulated inner liner.

3. The thermostatic cookware according to claim 1, characterized in that: The pot is a soup pot.

4. The constant temperature cooker according to claim 1, characterized in that: The pot body is a flat-bottomed pan.

5. The thermostatic cookware according to claim 2, characterized in that: The recess is a square with rounded corners.

6. The thermostatic cookware according to claim 3, characterized in that: The recess is hexagonal in shape and located on the edge of the soup pot.

7. The thermostatic cookware according to claim 4, characterized in that: The recess is hexagonal in shape and located on the bottom of the pan.

8. The method for manufacturing the pot body according to claim 1, characterized in that: Including the following methods: a. Roughen the inner contact surfaces of the aluminum middle plate and the aluminum outer plate. b. Graphite lines are formed on one of the roughened surfaces of the middle plate and the outer plate using graphite printing, and the process lines made by graphite printing are reserved along the upper edge. c. Attach the inner and middle stainless steel plates with the printed graphite lines to the roughened outer plate and align the three sides. d. The laminated inner, middle, and outer panels are placed in a heating furnace for heating and hot rolling to form a three-layer composite board; e. Place the three-layer composite board on the mold and press and stretch it to form the pot body; f. Drill countersunk holes at the process lines on the upper side of the pot body to form process holes; g. Place the pot body on a molding mold, and then inflate the process hole of the inner pot of the rice cooker, so that the graphite circuit expands along the outer plate, forming a rice cooker inner pot with a completely flat middle plate and an outward bulging channel network on the outer plate. H. Cut off the waste material with process holes around the edge of the pot body; I. Connect aluminum injection process pipe to the process line and inject heat-conducting fluid into the graphite line; J. Cut off the aluminum injection process pipe at the flash and the warped edge at that location, and weld it in place to prevent the heat transfer fluid from leaking out.

9. The method for manufacturing the pot body according to claim 8, characterized in that: Step K is included after step J, which cleans the exposed surface of the pot body and removes burrs and flash.

10. The method for manufacturing the pot body according to claim 9, characterized in that: Steps d and e are combined as follows: the bonded inner plate, middle plate, and outer plate are placed on a mold and stamped and stretched to form a pot body.

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