A jacketed kettle with temperature zones and its temperature control method

Abstract

This invention relates to a jacketed kettle with temperature zones and its temperature control method; it includes an inner liner and an outer shell, the inner liner being fixed inside the outer shell, a heating chamber being provided between the inner liner and the outer shell, the heating chamber being filled with heat-conducting oil; a heat-conducting inner shell is welded and fixed to the bottom of the inner liner, the edge of the heat-conducting inner shell being fixed to the outer wall of the inner liner, a first secondary heat-conducting cavity is provided between the heat-conducting inner shell and the inner liner, the first secondary heat-conducting cavity being filled with heat-conducting oil, a first inlet pipe and a first outlet pipe are vertically welded and fixed to the heat-conducting inner shell, the first inlet pipe and the first outlet pipe are connected to the main heat exchanger through a first circulating pump; a second secondary heat-conducting cavity is arranged at the top between the outer shell and the inner liner, the second secondary heat-conducting cavity being connected to the secondary heat exchanger; the heating process mainly uses the first secondary heat-conducting cavity to prevent the bottom from overheating, and can also preheat the bottom, while the second secondary heat-conducting cavity can prevent the edge of the jacketed kettle from getting too hot and sticking.

Description

Technical Field

[0001] This invention relates to a jacketed kettle with temperature zones and its temperature control method, belonging to the field of kitchen equipment. Background Technology

[0002] The jacketed kettle mainly heats the heat transfer oil inside the jacket through an electric heater at the bottom. By heating the heat transfer oil to above 100°C, the food inside the jacketed kettle is cooked. Because the electric heater is located at the bottom of the jacketed kettle, and the heat transfer oil mainly relies on convection heat exchange through temperature difference and density change, uneven temperature can easily occur between the bottom and side walls of the jacketed kettle, which can easily lead to scorching. Moreover, when the food is poured out of the jacketed kettle, because the edge of the jacketed kettle does not directly contact the food and mainly relies on heat exchange with the air spacer, the temperature is relatively high. After pouring, the food that is stuck to it is easily dehydrated due to the high temperature and sticks to the wall of the jacketed kettle. Over time, this can easily cause a layer to form, affecting its reuse. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the technical problems in the prior art and provide a jacketed kettle with temperature partitioning and its temperature control method.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A jacketed kettle with temperature zones includes an inner liner and an outer shell. The inner liner is fixed inside the outer shell. A heating chamber is provided between the inner liner and the outer shell, and the heating chamber is filled with heat-conducting oil. The heat-conducting oil is heated by a heating mechanism located at the bottom of the outer shell. A heat-conducting inner shell is welded and fixed to the bottom of the inner liner, and the edge of the heat-conducting inner shell is fixed to the outer wall of the inner liner. A first secondary heat-conducting chamber is provided between the heat-conducting inner shell and the inner liner, and the first secondary heat-conducting chamber is filled with heat-conducting oil. A first inlet pipe and a first outlet pipe are vertically welded and fixed to the heat-conducting inner shell. The first inlet pipe and the first outlet pipe penetrate the outer shell and are sealed and fixed between the outer shell and the outer shell. An inlet pipe and a first outlet pipe are connected to the main heat exchanger via a first circulating pump. The main heat exchanger regulates the temperature of the heating chamber through heat exchange. A progressively expanding protruding ring is provided at the top opening of the outer shell. A closed ring is provided between the top of the protruding ring and the outer wall of the inner liner. The protruding ring and the top of the outer shell are transitioned by a stepped surface. A partition ring is embedded on the stepped surface. A second auxiliary heat-conducting chamber is arranged between the partition ring and the closed ring. A second inlet pipe and a second outlet pipe are fixedly connected to the protruding ring. The second inlet pipe and the second outlet pipe are connected to the auxiliary heat exchanger via a second circulating pump.

[0006] As a further improvement of the present invention, the heat-conducting inner shell is arranged in a ring array with a plurality of connecting protrusions protruding toward the inner liner. The connecting protrusions are machined with welding openings, and the connecting protrusions are welded and fixed to the outer wall of the inner liner through the welding openings.

[0007] As a further improvement of the present invention, the stepped surface is an arc-shaped structure, the partition ring is a hollow tubular structure, the partition ring is filled with heat insulation material, and an annular extrusion protrusion is provided on the closed ring, the partition ring is pressed against the stepped surface under the extrusion of the extrusion protrusion.

[0008] As a further improvement of the present invention, the edge of the heat-conducting inner shell is arranged with a plurality of buffer connecting ribs in an annular array. The buffer connecting ribs are made of stainless steel sheets. One section of the buffer connecting rib is welded and fixed to the surface of the heat-conducting inner shell, and the remaining section of the buffer connecting rib is welded and fixed to the outer wall of the inner liner.

[0009] As a further improvement of the present invention, a connecting seat is provided at the bottom of the outer shell, and a heating mechanism is fixed inside the connecting seat. The heating mechanism is an electric heater.

[0010] As a further improvement of the present invention, a main connector and a secondary connector are welded and fixed on the outer shell. Two sets of main transfer pipes are fixed on the main connector. The first liquid inlet pipe and the first liquid outlet pipe are connected to the main transfer pipe through spring tubes, and the first liquid inlet pipe and the first liquid outlet pipe are transferred to the main heat exchanger through the main transfer pipes. Two sets of secondary transfer pipes are fixed on the secondary connector. The second liquid inlet pipe and the second liquid outlet pipe are connected to the secondary transfer pipes through spring tubes, and the second liquid inlet pipe and the second liquid outlet pipe are transferred to the secondary heat exchanger through the secondary transfer pipes.

[0011] As a further improvement of the present invention, an auxiliary heat exchange system is also included, the auxiliary heat exchange system comprising a buffer oil storage tank, wherein a main heat exchanger is arranged in the upper half of the buffer oil storage tank, and a secondary heat exchanger is arranged in the lower half of the buffer oil storage tank; an auxiliary heat exchanger is also arranged in the upper half of the buffer oil storage tank, the auxiliary heat exchanger being connected to an external heat exchange source through an auxiliary circulation pipeline.

[0012] A temperature control method for a jacketed kettle includes a heating initiation step, in which a heating mechanism heats the heat transfer oil in the heating chamber, and the heat transfer oil exchanges heat with the inner wall of the kettle. Simultaneously, a first circulation pump is started and set to high-speed mode. By circulating the heat transfer oil in the buffer oil storage tank, which has a relatively higher temperature than the current temperature of the jacketed kettle, the heating mechanism is assisted in quickly heating the jacketed kettle. The method also includes a heating step, in which the heating mechanism further heats the heat transfer oil, while the first circulation pump is set to low-speed mode to circulate the heat transfer oil in the first auxiliary heating chamber for heat exchange, thereby achieving rapid heating of the jacketed kettle relative to its current temperature. The lower temperature of the heat-conducting oil circulation reduces the temperature of the bottom of the inner pot near the heating mechanism, preventing scorching. The process also includes a pouring step, where the secondary heat exchanger, located at the bottom of the buffer oil storage tank, has a relatively lower temperature. A second circulation pump cools the second secondary heat-conducting chamber, thus cooling the top wall of the inner pot and preventing moisture from evaporating and adhering to the top surface of the inner pot during pouring. Finally, a heat-preservation step is included. During this step, the heating mechanism is turned off, and an external heat source heats the buffer oil storage tank through an auxiliary circulation pipe. The heat then heats the first secondary heat-conducting chamber through the buffer oil storage tank, thus maintaining the temperature of the inner pot.

[0013] The beneficial effects of this invention are:

[0014] This invention places a secondary heat-conducting cavity at the bottom of the jacketed kettle, which can circulate heat for exchange. The temperature of the secondary heat-conducting cavity is regulated by the low-speed circulation of high-temperature heat-conducting oil in the secondary heat-conducting cavity, thereby preventing the bottom of the jacketed kettle from becoming too hot and causing the food to burn. At the same time, the secondary heat-conducting cavity located at the top of the jacketed kettle can cool the top of the jacketed kettle, thereby preventing the food from sticking when it is poured out.

[0015] The connecting protrusion structure can increase the welding contact area between the heat-conducting inner shell and the inner liner, improve the connection strength, and at the same time, the protrusion structure can compensate for a certain range of deformation due to thermal expansion and contraction.

[0016] The partition ring uses a partition ring with a certain pre-tightening force to make the partition ring float with the thermal expansion and contraction between the inner liner and the outer shell, ensuring good sealing and partitioning effect and reducing the possibility of the west tower.

[0017] The buffer connecting ribs not only assist in heat conduction, but also further enhance welding strength.

[0018] Connectors ensure that pipes are connected to external equipment from a single location, improving the orderliness of pipes and reducing interference between pipes and supports when the jacketed kettle is overturned.

[0019] The auxiliary heat exchange system can provide additional functions such as auxiliary heating of the jacketed kettle, waste heat recovery, and heat preservation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the thermally conductive inner shell;

[0023] Figure 3 This is a connection diagram of the auxiliary heat exchange system.

[0024] In the diagram: 1. Inner liner; 2. Outer shell; 3. Flipping mechanism; 4. Closing ring; 5. Stepped surface; 6. Partition ring; 7. Thermal insulation material; 8. Extrusion protrusion; 9. Connecting protrusion; 10. Thermally conductive inner shell; 11. First secondary thermally conductive cavity; 12. First liquid inlet pipe; 13. Bottom connecting seat; 14. Electric heating tube; 15. Main spring tube; 16. First liquid outlet pipe; 17. Second liquid inlet pipe; 18. Second liquid outlet pipe; 19. Secondary spring tube; 20. Buffer connecting rib; 21. Main connector; 22. Secondary connector; 23. Welding opening. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0026] like Figure 1 As shown, the present invention is a jacketed kettle with temperature partitions, which mainly includes an outer shell, which is connected to a frame through a flipping mechanism, and an inner liner, which is nested inside the outer shell. A bottom connecting seat is provided at the bottom of the outer shell, and an electric heating tube is arranged in the bottom connecting seat. A closed ring is provided at the top of the outer shell, and a heating chamber is formed between the outer shell and the inner liner through the closed ring. The heating chamber is filled with heat-conducting oil. The heat-conducting oil is heated by the electric heating tube to achieve heat exchange between the inner liner and the inner liner, thereby heating the food inside the inner liner.

[0027] A gradually expanding protruding ring is provided at the top opening of the outer shell. The protruding ring and the top of the outer shell are transitioned by a stepped surface. The stepped surface is arc-shaped. A stainless steel partition ring is embedded on the stepped surface. The partition ring contacts the arc-shaped bottom of the stepped surface. Foam material can be filled inside the partition ring as a heat insulation medium. In order to ensure the contact stability of the partition ring, an annular extrusion protrusion is provided on the closed ring. The extrusion protrusion is made of stainless steel bending parts. The partition ring is pressed against the stepped surface under the extrusion protrusion. The partition ring separates the cavity of the outer shell and the inner liner to form a second secondary heat conduction cavity. A second liquid inlet pipe and a second liquid outlet pipe are fixedly connected to the protruding ring. The second liquid inlet pipe and the second liquid outlet pipe are connected to the secondary heat exchanger through a secondary circulation pipeline.

[0028] like Figure 2 A heat-conducting inner shell is welded and fixed to the bottom of the inner liner. The edge of the heat-conducting inner shell is fixed to the outer wall of the inner liner. Several connecting protrusions protruding towards the inner liner are arranged in a ring array on the heat-conducting inner shell. Welding openings are machined on the connecting protrusions, and the connecting protrusions are welded and fixed to the outer wall of the inner liner through the welding openings. Several buffer connecting ribs are arranged in a ring array on the edge of the heat-conducting inner shell. The buffer connecting ribs are made of stainless steel sheets. One section of the buffer connecting rib is welded and fixed to the surface of the heat-conducting inner shell, and the remaining section of the buffer connecting rib is welded and fixed to the outer wall of the inner liner. A first secondary heat-conducting cavity is provided between the heat-conducting inner shell and the inner liner. The first secondary heat-conducting cavity is filled with heat-conducting oil. A first liquid inlet pipe and a first liquid outlet pipe are vertically welded and fixed to the heat-conducting inner shell. The first liquid inlet pipe and the first liquid outlet pipe penetrate the outer shell and are sealed and fixed to the outer shell by welding. The first liquid inlet pipe and the first liquid outlet pipe are connected to the main heat exchanger through the main circulation pipeline.

[0029] A main connector and a secondary connector are welded onto the outer casing. Two sets of main adapter pipes are fixed on the main connector. The first liquid inlet pipe and the first liquid outlet pipe are connected to the main adapter pipe through a main spring tube. The first liquid inlet pipe and the first liquid outlet pipe are connected to the main heat exchanger through the main adapter pipe. Two sets of secondary adapter pipes are fixed on the secondary connector. The second liquid inlet pipe and the second liquid outlet pipe are connected to the secondary adapter pipe through a secondary spring tube. The second liquid inlet pipe and the second liquid outlet pipe are connected to the secondary heat exchanger through the secondary adapter pipe.

[0030] For the adjustment process of this structure, please refer to [link / reference]. Figure 3 The heating process includes a starting step, where the heating mechanism heats the heat transfer oil in the heating chamber, allowing heat exchange between the oil and the inner wall of the kettle. Simultaneously, the first circulation pump is activated and set to high-speed mode. This circulation, along with the relatively high-temperature heat transfer oil in the buffer oil storage tank (which is currently in contact with the jacketed kettle), assists the heating mechanism in quickly heating the jacketed kettle. The process also includes a heating step, where the heating mechanism further heats the heat transfer oil, while the first circulation pump is set to low-speed mode to circulate the heat transfer oil in the first auxiliary heat transfer chamber, allowing heat exchange between the oil and the relatively lower-temperature heat transfer oil in the jacketed kettle. The oil circulation system lowers the temperature of the bottom of the inner pot near the heating mechanism, preventing scorching. It also includes a pouring step, where the secondary heat exchanger, located at the bottom of the buffer oil storage tank (where the temperature is relatively low), uses a second circulation pump to cool the second secondary heat-conducting chamber, thus cooling the top wall of the inner pot and preventing moisture from evaporating and sticking to the top surface of the inner pot during pouring. Finally, it includes a heat preservation step, during which the heating mechanism is turned off, and an external heat source heats the buffer oil storage tank through an auxiliary circulation pipe, which in turn heats the first secondary heat-conducting chamber, thus keeping the inner pot warm.

[0031] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A jacketed kettle with temperature partitions; comprising an inner liner and an outer shell, the inner liner being fixed inside the outer shell, a heating chamber being provided between the inner liner and the outer shell, the heating chamber being filled with heat-conducting oil, the heat-conducting oil being heated by a heating mechanism located at the bottom of the outer shell, characterized in that: A heat-conducting inner shell is welded and fixed to the bottom of the inner liner. The edge of the heat-conducting inner shell is fixed to the outer wall of the inner liner. A first secondary heat-conducting cavity is provided between the heat-conducting inner shell and the inner liner. The first secondary heat-conducting cavity is filled with heat-conducting oil. A first inlet pipe and a first outlet pipe are vertically welded and fixed to the heat-conducting inner shell. The first inlet pipe and the first outlet pipe penetrate the outer shell and are sealed and fixed to the outer shell. The first inlet pipe and the first outlet pipe are connected to the main heat exchanger through a first circulation pump. The main heat exchanger regulates the temperature of the heating chamber through heat exchange. A gradually expanding protruding ring is provided at the top opening of the outer shell. A closing ring is provided between the top of the protruding ring and the outer wall of the inner liner. The protruding ring and the top of the outer shell are transitioned by a stepped surface. A partition ring is embedded on the stepped surface. A second secondary heat-conducting cavity is arranged between the partition ring and the closing ring. A second inlet pipe and a second outlet pipe are fixedly connected to the protruding ring. The second inlet pipe and the second outlet pipe are connected to the secondary heat exchanger through a second circulation pump.

2. A jacketed kettle with temperature partitions as described in claim 1, characterized in that: The heat-conducting inner shell has a ring array of several connecting protrusions protruding towards the inner liner. The connecting protrusions are machined with welding openings, and the connecting protrusions are welded to the outer wall of the inner liner through the welding openings.

3. A jacketed kettle with temperature partitions as described in claim 1, characterized in that: The stepped surface has an arc-shaped structure, and the partition ring has a hollow tubular structure. The partition ring is filled with heat-insulating material, and an annular extrusion protrusion is provided on the closed ring. The partition ring is pressed against the stepped surface by the extrusion protrusion.

4. A jacketed kettle with temperature partitions as described in claim 1, characterized in that: The edge of the heat-conducting inner shell is arranged in a ring array with several buffer connecting ribs. The buffer connecting ribs are made of stainless steel sheets. One section of the buffer connecting rib is welded and fixed to the surface of the heat-conducting inner shell, and the remaining section of the buffer connecting rib is welded and fixed to the outer wall of the inner liner.

5. A jacketed kettle with temperature partitions as described in claim 1, characterized in that: The bottom of the outer casing is provided with a connecting seat, and a heating mechanism, which is an electric heater, is fixed inside the connecting seat.

6. A jacketed kettle with temperature partitions as described in claim 1, characterized in that: A main connector and a secondary connector are welded and fixed to the outer casing. Two sets of main transfer pipes are fixed to the main connector. The first liquid inlet pipe and the first liquid outlet pipe are connected to the main transfer pipe through spring tubes. The first liquid inlet pipe and the first liquid outlet pipe are transferred to the main heat exchanger through the main transfer pipes. Two sets of secondary transfer pipes are fixed to the secondary connector. The second liquid inlet pipe and the second liquid outlet pipe are connected to the secondary transfer pipes through spring tubes. The second liquid inlet pipe and the second liquid outlet pipe are transferred to the secondary heat exchanger through the secondary transfer pipes.

7. A jacketed kettle with temperature partitions as described in claim 1, characterized in that: It also includes an auxiliary heat exchange system, which includes a buffer oil storage tank, wherein the main heat exchanger is arranged in the upper half of the buffer oil storage tank, and the auxiliary heat exchanger is arranged in the lower half of the buffer oil storage tank; an auxiliary heat exchanger is also arranged in the upper half of the buffer oil storage tank, and the auxiliary heat exchanger is connected to an external heat exchange source through an auxiliary circulation pipeline.

8. A temperature control method for a jacketed kettle as described in claim 7, characterized in that: The heating process includes a starting step where the heating mechanism heats the heat transfer oil in the heating chamber, facilitating heat exchange between the oil and the inner wall of the kettle. Simultaneously, the first circulation pump is activated and set to high-speed mode. This circulation, along with the relatively hotter heat transfer oil in the buffer oil storage tank (which is currently at a higher temperature than the jacketed kettle), assists the heating mechanism in quickly heating the jacketed kettle. The heating process also includes a further heating step where the heating mechanism further heats the heat transfer oil, while the first circulation pump is set to low-speed mode to circulate the heat transfer oil in the first auxiliary heating chamber, facilitating heat exchange with the relatively cooler heat transfer oil in the jacketed kettle. The system includes a circulation process to lower the temperature of the bottom of the inner pot near the heating mechanism, preventing food from burning. It also includes a discharging step, where the secondary heat exchanger, located at the bottom of the buffer oil storage tank (where the temperature is relatively low), uses a second circulation pump to cool the second secondary heat-conducting chamber, thus cooling the top wall of the inner pot and preventing moisture from evaporating and sticking to the top surface of the inner pot during pouring. Finally, it includes a heat preservation step, during which the heating mechanism is turned off, and an external heat source heats the buffer oil storage tank through an auxiliary circulation pipeline, which in turn heats the first secondary heat-conducting chamber, thus keeping the inner pot warm.

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