Heat preservation device

Abstract

The utility model relates to a heat preservation device, a heat preservation bowl comprises a bowl body and a bowl shell, the bowl shell is arranged on the surface of the bowl body in a sleeving mode, and the bowl body is made of plastic materials; a mounting cavity is formed in the base, and the bowl shell is movably arranged on the base; the heating assembly comprises an electromagnetic coil and a magnetizer, the magnetizer is clamped in a gap between the bowl shell and the bowl body, the electromagnetic coil is installed in the installation cavity, and the magnetizer generates eddy current after the electromagnetic coil is powered on; the control circuit board is installed in the installation cavity and electrically connected with the magnetizer. The bowl body realizes wireless conduction through the matching of the magnetizer and the electromagnetic coil, so that the phenomenon that the heat preservation device is burnt out due to the fact that a contact pin is easy to generate short circuit when water exists in an existing contact pin heat conduction heating mode is avoided. The bowl body is made of plastic materials, the electromagnetic induction phenomenon cannot occur in an alternating magnetic field, scalding cannot be caused even if the plastic bowl body is directly touched, and meanwhile the problem that high-iron rice flour is prone to blackening when boiled in a heat preservation bowl can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of heat preservation kitchenware, and in particular to a heat preservation device. Background Art

[0002] The traditional tableware that is widely used at present cannot keep food at a constant temperature for a long time. People, especially special groups such as children, pregnant women, and the elderly, can easily cause damage to their stomachs and intestines when eating food that is too cold or too hot. In addition, children generally eat slowly and cannot finish their meals before the food cools down. Using thermos bowls can solve these problems well.

[0003] The insulation bowls on the market are divided into water-filled insulation bowls and USB constant temperature insulation bowls. Water-filled insulation bowls are cheap, but they have disadvantages such as inaccurate temperature and insufficient temperature retention. The USB constant temperature bowls currently on the market have accurate temperature retention and come with their own batteries for continuous heat retention, but the bowl and the heating element are integrated, which leads to safety risks when cleaning. Utility Model Content

[0004] Based on this, it is necessary to provide a heat preservation device to address the safety risks and inconvenience of cleaning of heat preservation bowls.

[0005] A heat preservation device of the present application comprises:

[0006] A heat-insulating bowl, comprising a bowl body and a bowl shell, wherein the bowl shell is sleeved on the surface of the bowl body, and the bowl body is made of plastic material;

[0007] A base, wherein a mounting cavity is formed inside the base, and the bowl shell is movably arranged on the base;

[0008] A heating component, the heating component comprising an electromagnetic coil and a magnetic conductor, the magnetic conductor is sandwiched between the bowl shell and the bowl body, the electromagnetic coil is installed in the installation cavity, and the magnetic conductor generates eddy currents after the electromagnetic coil is powered on;

[0009] A control circuit board is installed in the installation cavity, and the control circuit board is electrically connected to the magnetic conductor.

[0010] The heat preservation device disclosed in the present application has a magnetizer sandwiched between the bowl body and the bowl shell, and an electromagnetic coil is provided in the mounting cavity in the base. When the electromagnetic coil is powered on, an alternating magnetic field is generated. When the heat preservation bowl is placed on the base, the magnetizer is located in the alternating magnetic field, and an eddy current appears inside the magnetizer. The Joule heat effect of the eddy current heats up the magnetizer, thereby heating the bowl body. Since the bowl body is made of plastic material, the bowl body will not experience electromagnetic induction in the alternating magnetic field. Compared with the traditional hardware bowl that generates its own heat in the alternating magnetic field, the plastic bowl body will not cause burns even if it is directly touched. At the same time, it can also solve the problem that the heat preservation bowl is easy to turn black when cooking high-iron rice noodles. In addition, the bowl shell is movably connected to the base, so that the heat preservation bowl can be moved away from the base and cleaned separately. The bowl body is wirelessly connected through the cooperation of the magnetizer and the electromagnetic coil, which can avoid the existing method of using a stylus to conduct heat and heat, which is easy to cause a stylus short circuit when there is water, resulting in the burning of the heat preservation device.

[0011] In one of the embodiments, the magnetic conductor is in a sheet-like structure, and the magnetic conductor is wrapped around the side wall and the bottom of the bowl body.

[0012] The heat preservation device in the above embodiment further defines that the magnetic conductor is in sheet form, so that the magnetic conductor can be wrapped around the side walls and the bottom of the bowl body, thereby increasing the heating area of ​​the bowl body and improving the heating efficiency of the food in the bowl body; in addition, by sandwiching the magnetic conductor in sheet form between the bowl shell and the bowl body, the overall thickness of the heat preservation bowl can be reduced and the volume can be reduced.

[0013] In one of the embodiments, the top of the base is recessed toward the mounting cavity to form a groove that matches the shape of the bowl shell, and the bowl shell is inserted into the groove.

[0014] The insulation device in the above embodiment further defines that the groove formed on the top of the base can be used to install the bowl shell, thereby fixing the insulation bowl on the base, so that the insulation pot will not shake easily on the base; by directly inserting the groove into the bowl shell, the insulation bowl and the base can be quickly assembled.

[0015] In one of the embodiments, one of the base or the bowl shell is provided with a slot, and the other is provided with a limit block, and the limit block can slide relative to the slot and be engaged.

[0016] The heat preservation device in the above embodiment further defines that the bowl shell and the base are locked by the engagement of the limit block and the slot.

[0017] In one of the embodiments, the heating component further includes a coil bracket, the coil bracket is located in the installation cavity, and the coil bracket is arranged on the outside of the groove, and the electromagnetic coil is wound on the coil bracket.

[0018] The heat preservation device in the above embodiment further defines that the electromagnetic coil is fixed on the base through a coil bracket, and the coil bracket is arranged on the side wall of the groove, so as to reduce the distance between the electromagnetic coil and the magnetic conductor, and make as many magnetic conductors as possible fall into the alternating magnetic field generated by the electromagnetic coil, thereby improving the heating efficiency.

[0019] In one of the embodiments, the projections of the electromagnetic coil and the magnetic conductor wrapped on the side wall of the bowl body in the horizontal direction at least partially overlap.

[0020] In one of the embodiments, the heat preservation device in the above embodiment further defines that the edge of the frame is connected to a surrounding edge, and a positioning marble is arranged on the first rotating seat. When the positioning marble is engaged with the surrounding edge, the first rotating seat is maintained in the first position, and the pull rod remains in a standing state relative to the frame. Since the positioning marble can perform telescopic movement relative to the first rotating seat, when the user applies force to the pull rod, the positioning marble is elastically deformed by the pressure of the surrounding edge, and the positioning marble can be disengaged from the surrounding edge. At this time, the pull rod can rotate at any angle relative to the frame between the first position and the second position.

[0021] The heat preservation device in the above embodiment is further defined as a temperature sensor provided on the base for detecting the heating temperature of the bowl body.

[0022] In one of the embodiments, the heat preservation device further includes a battery module, wherein the battery module is located in the installation cavity, and the battery module is electrically connected to the control circuit board and the electromagnetic coil respectively.

[0023] The heat preservation device in the above embodiment further defines that a battery module for controlling the circuit board and the electromagnetic coil is arranged in the installation cavity, so that the heat preservation device of the present application can be flexibly used in various scenarios and is convenient for carrying and use outside.

[0024] In one of the embodiments, a fixing bracket is provided in the installation cavity, the control circuit board and the battery module are provided on the fixing bracket, the electromagnetic coil is distributed above the fixing bracket, and the control circuit board and the battery module are distributed below the fixing bracket.

[0025] The thermal insulation device in the above embodiment further defines that the electromagnetic coil is arranged above the fixed bracket, and the battery module and the control circuit board are arranged below the fixed bracket. The fixed bracket not only provides installation conditions for the battery module and the control circuit board, but also can reduce the heat of the electromagnetic coil and the influence of the magnetic field on the battery module and the control circuit board, thereby ensuring the stable operation of the thermal insulation device.

[0026] In one of the embodiments, the thermal insulation bowl further comprises a bowl cover, and the bowl cover is arranged on the bowl body or the bowl shell.

[0027] In one of the embodiments, the heat preservation device further includes a display module, the display module is disposed on the base, and the display module is electrically connected to the control circuit board.

[0028] The heat preservation device in the above embodiment is further defined as having a display module provided on the base, and the display module can be used to display the current working parameters of the heat preservation device, such as the set temperature, the current temperature of the bowl body, the heating time, the heating gear and other parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the assembly of a heat preservation device in one embodiment;

[0030] Figure 2 is a cross-sectional view of a heat preservation device in one embodiment;

[0031] Figure 3 It is a schematic diagram of the assembly of the magnetizer and the thermal insulation bowl in one embodiment.

[0032] Reference numerals:

[0033] 10 heat preservation bowl, 11 bowl body, 12 bowl shell, 13 bowl cover, 101 slot, 102 first through hole;

[0034] 20 base, 210 fixing bracket, 220 limiting block, 201 installation cavity, 202 groove;

[0035] 30 heating component, 31 electromagnetic coil, 32 magnetic conductor, 33 coil support;

[0036] 40 control circuit board;

[0037] 50 temperature sensor;

[0038] 60 battery module, 61 rechargeable battery, 62 charging interface;

[0039] 70 display modules. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0042] like Figures 1 to 3 As shown, this embodiment provides a heat preservation device, including:

[0043] The heat-insulating bowl 10 comprises a bowl body 11 and a bowl shell 12. The bowl shell 12 is sleeved on the surface of the bowl body 11. The bowl body 11 is made of plastic material.

[0044] A base 20, wherein a mounting cavity 201 is formed inside the base 20, and the bowl shell 12 is movably disposed on the base 20;

[0045] The heating assembly 30 includes an electromagnetic coil 31 and a magnetizer 32. The magnetizer 32 is sandwiched between the bowl shell 12 and the bowl body 11. The electromagnetic coil 31 is installed in the installation cavity 201. The magnetizer 32 generates eddy currents after the electromagnetic coil 31 is energized.

[0046] The control circuit board 40 is installed in the installation cavity 201 , and the control circuit board 40 is electrically connected to the magnetic conductor 32 .

[0047] Among them, the bowl body 11 can be used to hold food, such as milk, complementary food, etc.; the bowl body 11 is made of plastic material, such as food-grade polyethylene, polypropylene, etc., and the bowl body 11 will not have electromagnetic induction after the electromagnetic coil 31 is powered on, so the bowl body 11 itself will not self-heat. In addition, the bowl body 11 made of plastic material is not easy to turn black when cooking foods such as high-iron rice noodles.

[0048] The bowl shell 12 can be used by the user to move the bowl body 11. The bowl shell 12 is made of a material that will not cause electromagnetic induction due to the electromagnetic coil 31, such as plastic, wood, glass, etc. The bowl shell 12 is sleeved on the bowl body 11 to avoid directly touching the bowl body 11 when moving the bowl body 11, causing burns and the like.

[0049] The magnetizer 32 can be used to heat the bowl body 11. After the electromagnetic coil 31 is supplied with an alternating current, an alternating magnetic field with a continuously changing direction is generated, and an eddy current appears inside the magnetizer 32 in the alternating magnetic field. The Joule heating effect of the eddy current causes the magnetizer 32 to heat up, thereby heating the bowl body 11. The magnetizer can be, but is not limited to, a metal material and a non-metal material. For example, the magnetizer is a metal material, such as copper, stainless steel, or aluminum alloy. It should be noted that in other embodiments, the magnetizer can be a non-metal material such as graphite.

[0050] The base 20 is a shell structure with an installation cavity 201 formed inside. The installation cavity 201 can be used to install the electromagnetic coil 31 and the control circuit board 40 to avoid the risk of electric shock caused by the electromagnetic coil 31 and the control circuit board 40 being exposed. The base 20 can be used to support the insulation bowl 10. When the insulation bowl 10 is placed on the base 20, the magnetic conductor 32 in the insulation bowl 10 is within the range of the alternating magnetic field formed by the electromagnetic coil 31. The bowl shell 12 is movably arranged on the base 20, so that the entire insulation bowl 10 and the base 20 are two independent modules, and the insulation bowl 10 can be moved at will and cleaned separately without being affected.

[0051] In each of the above embodiments, a magnetizer 32 is sandwiched between the bowl body 11 and the bowl shell 12, and an electromagnetic coil 31 is provided in the mounting cavity 201 in the base 20. The electromagnetic coil 31 generates an alternating magnetic field after being powered on. When the thermal insulation bowl 10 is placed on the base 20, the magnetizer 32 is located in the alternating magnetic field, and an eddy current appears inside the magnetizer 32. The Joule heat effect of the eddy current heats up the magnetizer 32, thereby heating the bowl body 11. Since the bowl body 11 is made of plastic material, the bowl body 11 will not experience electromagnetic induction in the alternating magnetic field. Compared with the traditional use of hardware bowls that generate their own heat in the alternating magnetic field, the plastic bowl body 11 will not cause burns even if it is directly touched. At the same time, it can also solve the problem that high-iron rice noodles cooked in a thermal insulation bowl tend to turn black. In addition, the bowl shell 12 is movably connected to the base 20, so that the thermal insulation bowl 10 can be moved away from the base 20 and cleaned separately. The bowl body 11 realizes wireless conduction through the cooperation of the magnetic conductor 32 and the electromagnetic coil 31, which can avoid the existing method of using a contact pin for thermal heating, which is prone to short circuit of the contact pin and burn out the thermal insulation device when there is water.

[0052] like Figure 2 and Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the magnetizer 32 is in a sheet-like structure, and the magnetizer 32 is wrapped around the side wall and the bottom of the bowl body 11.

[0053] Among them, the magnet 32 ​​is in the form of a sheet, so that the magnet 32 ​​can be wrapped around the side wall of the bowl body 11 and the bottom of the bowl body 11, thereby increasing the heating area of ​​the bowl body 11 and improving the heating efficiency of the food in the bowl body 11; in addition, by sandwiching the magnet 32 ​​in the form of a sheet between the bowl shell 12 and the bowl body 11, the overall thickness of the heat preservation bowl 10 can be reduced and the volume can be reduced. It should be noted that in other embodiments, the magnet 32 ​​can also be wrapped only on the side wall of the bowl body 11 or the bottom of the bowl body 11.

[0054] like Figure 1 and Figure 2As shown, in addition to the features of the above embodiments, this embodiment further defines that: the top of the base 20 is recessed toward the mounting cavity 201 to form a groove 202 that matches the shape of the bowl shell 12 , and the bowl shell 12 is inserted into the groove 202 .

[0055] Among them, the groove 202 formed on the top of the base 20 can be used to install the bowl shell 12, so that the insulation bowl 10 is fixed on the base 20, so that the insulation pot will not shake easily on the base 20; by directly inserting the bowl shell 12 into the groove 202, the insulation bowl 10 and the base 20 can be quickly assembled.

[0056] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines: one of the base 20 or the bowl shell 12 is provided with a slot 101, and the other is provided with a limit block 220, and the limit block 220 can slide relative to the slot 101 and be engaged.

[0057] The bowl shell 12 and the base 20 are locked by the engagement of the stopper 220 and the slot 101. Exemplarily, the stopper 220 is formed on the inner side wall of the groove 202, and the slot 101 is formed on the surface of the bowl shell 12. The stopper 220 can slide relative to the slot 101 and form at least a first position and a second position. When in the first position, the stopper 220 can slide longitudinally relative to the slot 101 to separate the bowl shell 12 from the base 20. When in the second position, the stopper 220 can slide transversely relative to the slot 101, and its longitudinal sliding is limited. At this time, the stopper 220 is engaged with the slot 101 to prevent the thermal insulation bowl 10 from accidentally falling off from the base 20.

[0058] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further defines: the heating component 30 also includes a coil bracket 33, the coil bracket 33 is located in the installation cavity 201, and the coil bracket 33 is arranged on the outside of the groove 202, and the electromagnetic coil 31 is wound on the coil bracket 33.

[0059] Among them, the electromagnetic coil 31 is fixed on the base 20 through the coil bracket 33, and the coil bracket 33 is arranged on the side wall of the groove 202 to reduce the distance between the electromagnetic coil 31 and the magnetic conductor 32, so that as many magnetic conductors 32 as possible fall into the alternating magnetic field generated by the electromagnetic coil 31, thereby improving the heating efficiency.

[0060] like Figure 2 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the projections of the electromagnetic coil 31 and the magnetic conductor 32 wrapped on the side wall of the bowl body 11 in the horizontal direction at least partially overlap.

[0061] like Figure 1 and Figure 2As shown, in addition to the features of the above embodiments, this embodiment further defines: the heat preservation device also includes a temperature sensor 50, the temperature sensor 50 is electrically connected to the control circuit board 40, the temperature sensor 50 is arranged on the base 20, the bowl shell 12 is provided with a first through hole 102, the temperature sensor 50 partially passes through the first through hole 102 and abuts against the bowl body 11, and the temperature sensor 50 is used to detect the heating temperature of the bowl body 11.

[0062] Among them, a temperature sensor 50 is provided on the base 20 for detecting the heating temperature of the bowl body 11. Specifically, a first through hole 102 is provided at the bottom of the bowl shell 12, and the temperature sensor 50 passes through the first through hole 102 and abuts against the bottom of the bowl body 11, so that the heating temperature obtained by the temperature sensor 50 from the bowl body 11 is more accurate. After obtaining the heating temperature, the temperature sensor 50 feeds back to the control circuit board 40, and the control circuit board 40 can automatically adjust the current input to the electromagnetic coil 31 according to the user's instructions or the set program to adjust the heating power of the magnetic conductor 32.

[0063] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further defines: the heat preservation device also includes a battery module 60, the battery module 60 is located in the installation cavity 201, and the battery module 60 is electrically connected to the control circuit board 40 and the electromagnetic coil 31 respectively.

[0064] Among them, a battery module 60 for powering the control circuit board 40 and the electromagnetic coil 31 is arranged in the installation cavity 201, so that the heat preservation device of the present application can be flexibly used in various scenarios and is convenient for carrying and using. Specifically, the battery module 60 includes a rechargeable battery 61 and a charging interface 62, and the rechargeable battery 61 and the charging interface 62 are electrically connected to the control circuit board 40 respectively, and the rechargeable battery 61 can be charged from an external power source through the charging interface 62 and the control circuit board 40. It should be noted that in some embodiments, the charging interface 62 is a combination of one or more of a Type-c interface, a Micro-USB interface, a lightning interface, a Mini-USB interface, and a USB male interface.

[0065] like Figure 2 As shown, in addition to the features of the above-mentioned embodiments, this embodiment further defines: a fixing bracket 210 is arranged in the installation cavity 201, the control circuit board 40 and the battery module 60 are arranged on the fixing bracket 210, the electromagnetic coil 31 is distributed above the fixing bracket 210, and the control circuit board 40 and the battery module 60 are distributed below the fixing bracket 210.

[0066] Among them, the electromagnetic coil 31 is arranged above the fixed bracket 210, and the battery module 60 and the control circuit board 40 are both arranged below the fixed bracket 210. The fixed bracket 210 not only provides installation conditions for the battery module 60 and the control circuit board 40, but also can reduce the heat of the electromagnetic coil 31 and the influence of the magnetic field on the battery module 60 and the control circuit board 40, thereby ensuring the stable operation of the insulation device.

[0067] like Figures 1 to 3 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the thermal insulation bowl 10 also includes a bowl cover 13, and the bowl cover 13 is covered on the bowl body 11 or the bowl shell 12.

[0068] like Figure 1 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the heat preservation device also includes a display module 70, the display module 70 is arranged on the base 20, and the display module 70 is electrically connected to the control circuit board 40.

[0069] Among them, a display module 70 is provided on the base 20, and the display module 70 can be used to display the current working parameters of the heat preservation device, such as the set temperature, the current temperature of the bowl body 11, the heating time, the heating gear and other parameters. It should be noted that in some embodiments, the display module 70 is also used to receive user input instructions in the form of buttons, touch screens, etc. to adjust the working parameters of the heat preservation device.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present utility model patent shall be subject to the attached claims.

Claims

1. A heat preservation device, characterized in that: include: A heat-insulating bowl (10), the heat-insulating bowl (10) comprising a bowl body (11) and a bowl shell (12), the bowl shell (12) being sleeved on the surface of the bowl body (11), and the bowl body (11) being made of plastic material; A base (20), wherein a mounting cavity (201) is formed inside the base (20), and the bowl shell (12) is movably arranged on the base (20); A heating component (30), the heating component (30) comprising an electromagnetic coil (31) and a magnetic conductor (32), the magnetic conductor (32) being sandwiched in a gap between the bowl shell (12) and the bowl body (11), the electromagnetic coil (31) being installed in the installation cavity (201), and the magnetic conductor (32) generating eddy currents after the electromagnetic coil (31) is energized; A control circuit board (40), wherein the control circuit board (40) is installed in the installation cavity (201), and the control circuit board (40) is electrically connected to the magnetic conductor (32).

2. The heat preservation device according to claim 1, characterized in that: The magnetic conductor (32) is in a sheet-like structure, and the magnetic conductor (32) is wrapped around the side wall and the bottom of the bowl body (11).

3. The heat preservation device according to claim 1 or 2, characterized in that: The top of the base (20) is recessed in the direction of the installation cavity (201) to form a groove (202) that matches the shape of the bowl shell (12), and the bowl shell (12) is inserted into the groove (202).

4. The heat preservation device according to claim 3, characterized in that: One of the base (20) or the bowl shell (12) is provided with a slot (101), and the other is provided with a limit block (220), wherein the limit block (220) can slide relative to the slot (101) and be locked.

5. The heat preservation device according to claim 3, characterized in that: The heating component (30) further comprises a coil support (33), wherein the coil support (33) is located in the installation cavity (201), and the coil support (33) is arranged outside the groove (202), and the electromagnetic coil (31) is wound on the coil support (33).

6. The heat preservation device according to claim 5, characterized in that: The projections of the electromagnetic coil (31) and the magnetic conductor (32) wrapped on the side wall of the bowl body (11) in the horizontal direction at least partially overlap.

7. The heat preservation device according to claim 1, characterized in that: It also includes a temperature sensor (50), which is electrically connected to the control circuit board (40). The temperature sensor (50) is arranged on the base (20). The bowl shell (12) is provided with a first through hole (102). The temperature sensor (50) partially passes through the first through hole (102) and abuts against the bowl body (11). The temperature sensor (50) is used to detect the heating temperature of the bowl body (11).

8. The heat preservation device according to claim 1, characterized in that: It also includes a battery module (60), the battery module (60) being located in the installation cavity (201), and the battery module (60) being electrically connected to the control circuit board (40) and the electromagnetic coil (31) respectively.

9. The heat preservation device according to claim 8, characterized in that: A fixing bracket (210) is arranged in the installation cavity (201); the control circuit board (40) and the battery module (60) are arranged on the fixing bracket (210); the electromagnetic coil (31) is distributed above the fixing bracket (210); and the control circuit board (40) and the battery module (60) are distributed below the fixing bracket (210).

10. The heat preservation device according to claim 1, characterized in that: The heat-insulating bowl (10) further comprises a bowl cover (13), wherein the bowl cover (13) is arranged on the bowl body (11) or the bowl shell (12); and / or, It also includes a display module (70), wherein the display module (70) is arranged on the base (20), and the display module (70) is electrically connected to the control circuit board (40).

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