Electric heating heat preservation device

Abstract

The utility model discloses an electric heating heat preservation device which comprises a shell, an inner container and a heating heat preservation module, the inner container is provided with a containing cavity with an upward opening, the inner container is arranged in the shell, and the heating heat preservation module is located between the inner wall face of the shell and the outer wall face of the inner container. The heating and heat preservation module sequentially comprises a heating assembly, an isolation supporting piece and a vacuum heat preservation piece from inside to outside, the heating assembly is arranged around the outer side wall of the inner container, a vacuum cavity is formed in the vacuum heat preservation piece, and the vacuum heat preservation piece is arranged in the inner container in a sleeving mode; the isolation supporting piece is used for separating the heating assembly and the vacuum heat preservation piece, when the heating assembly stops working, a vacuum cavity in the vacuum heat preservation piece is in a vacuum state, the heat insulation capacity is good, therefore, heat loss can be effectively prevented, the heat preservation structure is reasonably configured, the heat preservation performance is improved, and meanwhile heat preservation energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to an electric heating and heat preservation device. Background Art

[0002] Among existing heating devices, some have a heat preservation function. However, for the existing heat preservation function, a temperature sensor is basically used to detect the temperature of the inner container. If the temperature of the inner container decreases, the control module controls the heating component to heat the inner container so that the temperature of the inner container is maintained at the set heat preservation temperature. However, heat is continuously dissipated, and the heating component can only continuously heat the inner container, which will consume more electric energy during long-term operation. Some heating devices are provided with heat preservation materials to form a heat preservation structure, but the heat preservation structure is unreasonable and the heat preservation effect is not good. At the same time, the heat preservation structure may be damaged during the heating process of the heating component. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an electric heating and heat preservation device, which reasonably configures the heat preservation structure, improves the heat preservation performance, and reduces the heat preservation energy consumption at the same time.

[0004] An electric heating and heat preservation device according to an embodiment of the first aspect of the utility model includes: a housing; an inner container having a receiving cavity with an upward opening, and the inner container is disposed in the housing; a heating and heat preservation module located between the inner wall surface of the housing and the outer wall surface of the inner container. The heating and heat preservation module sequentially includes a heating component, an isolation support member, and a vacuum heat preservation member from the inside to the outside. The heating component is disposed around the outer side wall of the inner container. A vacuum cavity is provided in the vacuum heat preservation member, and the vacuum heat preservation member is sleeved on the inner container. The isolation support member is used to separate the heating component and the vacuum heat preservation member.

[0005] An electric heating and heat preservation device according to an embodiment of the utility model has at least the following beneficial effects:

[0006] In the electric heating and heat preservation device of the utility model, the heating and heat preservation module is disposed between the inner wall surface of the housing and the outer wall surface of the inner container. The heating component can generate heat to heat the inner container. Due to the isolation of the isolation support member, the heating component that generates heat does not directly act on the vacuum heat preservation member, but converges to heat the inner container, improving the heating efficiency and preventing damage to the vacuum heat preservation member. When the heating component stops working, the vacuum cavity in the vacuum heat preservation member is in a vacuum state and has good heat insulation ability, so that heat dissipation can be effectively prevented. This design reasonably configures the heat preservation structure, improves the heat preservation performance, and reduces the heat preservation energy consumption at the same time.

[0007] According to some embodiments of the utility model, the heating component includes a flexible, heat-conducting and insulating protective film and a heating element, and the heating element is disposed in the protective film.

[0008] According to some embodiments of the present utility model, the protective film is attached to the outer side wall of the inner container; the protective film is also attached to the bottom wall of the inner container.

[0009] According to some embodiments of the present utility model, the heating element is a graphene heating sheet or a semiconductor heating sheet.

[0010] According to some embodiments of the present utility model, the vacuum heat preservation member includes a rigid housing, the vacuum cavity is opened in the housing, a first elastic layer is arranged between the isolation support member and the housing, and a second elastic layer is arranged between the housing and the inner wall surface of the outer shell.

[0011] According to some embodiments of the present utility model, the first elastic layer and the second elastic layer are rubber or resin.

[0012] According to some embodiments of the present utility model, the housing is provided with a plurality of support ribs in the vacuum cavity, one end of the support rib is connected to the inner wall of the housing close to the first elastic layer, and the other end of the support rib is connected to the inner wall of the housing close to the second elastic layer.

[0013] According to some embodiments of the present utility model, the isolation support member is made of ceramic fiber material.

[0014] According to some embodiments of the present utility model, the electric heating and heat preservation device further includes a first temperature detection module and a second temperature detection module, the first temperature detection module is arranged between the inner container and the heating assembly, and the second temperature detection module is arranged between the isolation support member and the vacuum heat preservation member.

[0015] According to some embodiments of the present utility model, the electric heating and heat preservation device further includes a control module, and the control module is respectively connected to the first temperature detection module, the second temperature detection module and the heating assembly.

[0016] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a three-dimensional schematic diagram of one embodiment of the electric heating and heat preservation device of the present utility model;

[0019] Figure 2 is an exploded view of one embodiment of the electric heating and heat preservation device of the present utility model;

[0020] Figure 3 For Figure 1 It is a cross-sectional view of section A-A of one embodiment of the electrothermal insulation device of the present utility model;

[0021] Figure 4 It is a schematic cross-sectional view of one embodiment of the heating and insulation module;

[0022] Figure 5 It is a principle structure block diagram of one embodiment of the electrothermal insulation device of the present utility model.

[0023] Reference numerals:

[0024] Outer shell 100; Inner container 200; Accommodation cavity 210; Heating and insulation module 300; Heating component 310; Protective film 311; Heating element 312; Isolation support 320; Vacuum insulation 330; Vacuum cavity 331; Support rib 332; Control module 400; First elastic layer 500; Second elastic layer 600; First temperature detection module 700; Second temperature detection module 800. Specific embodiments

[0025] The following describes in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0026] In the description of the present utility model, it should be understood that for orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] As Figures 1 - 5 shown, an electrothermal insulation device according to an embodiment of the first aspect of the present utility model includes a housing 100, an inner container 200, and a heating and insulation module 300. The inner container 200 has a receiving cavity 210 with an upward opening. The inner container 200 is disposed in the housing 100. The heating and insulation module 300 is located between the inner wall surface of the housing 100 and the outer wall surface of the inner container 200. The heating and insulation module 300 sequentially includes a heating component 310, an isolation support 320, and a vacuum insulation member 330 from the inside to the outside. The heating component 310 is disposed around the outer sidewall of the inner container 200. A vacuum cavity 331 is provided in the vacuum insulation member 330. The vacuum insulation member 330 is sleeved on the inner container 200. The isolation support 320 is used to separate the heating component 310 and the vacuum insulation member 330.

[0030] Among them, the housing 100 can be in the shape of a cuboid, a cylindrical barrel, etc. An object to be heated such as food can be placed in the receiving cavity 210. The housing 100 can also be provided with a separate electrical cavity on the side of the inner container 200. The power supply driving circuit board can be placed in the electrical cavity. The electrical plug can be connected to the power supply driving circuit board through a wire. The electrical plug can be connected to a power supply. A rectifier bridge circuit, a switching power supply circuit, etc. can be provided on the power supply driving circuit board to modulate a suitable supply voltage for powering the heating component 310.

[0031] In the electrical cavity, the electrothermal insulation device further includes a control module 400. The control module 400 can include a processor such as an MCU or a CPU and its affiliated circuits. The control module 400 is connected to the heating component 310 through a driving circuit composed of a switching tube to control the start and stop of the heating component 310, and can also control the heating power of the heating component 310.

[0032] The electrothermal insulation device of the present utility model has a heating and insulation module 300 disposed between the inner wall surface of the outer shell 100 and the outer wall surface of the inner container 200. The heating component 310 can generate heat to heat the inner container 200. Due to the isolation of the isolation support member 320, the heating component 310 that generates heat does not directly act on the vacuum insulation member 330, but converges to heat the inner container 200, improving the heating efficiency and preventing damage to the vacuum insulation member 330. When the heating component 310 stops working, the vacuum cavity 331 in the vacuum insulation member 330 is in a vacuum state with good heat insulation ability, thereby effectively preventing heat dissipation. This design rationally configures the insulation structure, improves the insulation performance, and reduces the insulation energy consumption at the same time.

[0033] In some embodiments of the present utility model, as Figure 4 shown, the heating component 310 includes a flexible, heat-conducting and insulating protective film 311 and a heating element 312, and the heating element 312 is disposed within the protective film 311.

[0034] Among them, the protective film 311 can be made of rubber or flexible resin material with good heat-conducting ability. The heating element 312 is embedded within the protective film 311. The flexible function of the protective film 311 enables the protective film 311 to closely adhere to the outer side wall of the inner container 200. When the heating element 312 generates heat, the heat is first transferred to the protective film 311, and then evenly conducted by the protective film 311 to each area of the outer side wall of the inner container 200. In addition, the protective film 311 can also protect the surface of the heating element 312, preventing the isolation support member 320 from wearing the heating element 312 and causing the heating element 312 to be open-circuited.

[0035] In some embodiments of the present utility model, the protective film 311 is attached to the outer side wall of the inner container 200, and heat can be radiated from the side of the inner container 200 into the inner container 200 to heat the objects in the accommodation cavity 210.

[0036] In some embodiments of the present utility model, the protective film 311 is also attached to the bottom wall of the inner container 200, and heat can also be radiated from the bottom surface of the inner container 200 into the inner container 200. When heat is radiated into the inner container 200 from the bottom surface and the side surface together, the heating can be made more uniform.

[0037] Specifically, the heating element 312 is a graphene heating sheet or a semiconductor heating sheet. The heating element 312 is in a sheet shape and has a certain ductility to be disposed within the protective film 311, which can make the heating uniform.

[0038] In some embodiments of the present utility model, the vacuum heat preservation member 330 includes a rigid sleeve, the vacuum cavity 331 is formed inside the sleeve, a first elastic layer 500 is provided between the isolation support member 320 and the sleeve, and a second elastic layer 600 is provided between the sleeve and the inner wall surface of the outer shell 100.

[0039] Among them, the sleeve can be in a barrel shape, the inner container 200 is inserted into the sleeve, and the sleeve covers both the side wall and the bottom wall of the inner container 200, so as to prevent heat dissipation to a large extent and optimize the heat preservation ability.

[0040] In addition, a first elastic layer 500 is provided between the isolation support member 320 and the sleeve, so as to prevent the relatively rigid isolation support member 320 from pressing against the sleeve and causing damage to the sleeve, resulting in the loss of the vacuum characteristic of the vacuum cavity 331 and the influence on the heat preservation performance. Similarly, a second elastic layer 600 is provided between the sleeve and the inner wall surface of the outer shell 100, which can also prevent the inner wall surface of the relatively rigid outer shell 100 from pressing against the sleeve and causing damage to the sleeve.

[0041] Specifically, the first elastic layer 500 and the second elastic layer 600 are made of rubber or resin.

[0042] In some embodiments of the present utility model, as Figure 4 shown, a plurality of support ribs 332 are provided in the vacuum cavity 331 of the sleeve, one end of the support rib 332 is connected to the inner wall of the sleeve close to the first elastic layer 500, and the other end of the support rib 332 is connected to the inner wall of the sleeve close to the second elastic layer 600.

[0043] In the sleeve, the vacuum cavity 331 extends along the shape of the sleeve, and the range of the vacuum cavity 331 covering the inner container 200 is large enough to improve the heat preservation ability. Since the vacuum cavity 331 is in a vacuum state, it will bear the pressure exerted by the air pressure difference. Therefore, a plurality of support ribs 332 are provided in the vacuum cavity 331. The support ribs 332 can be evenly arranged in the vacuum cavity 331, and the support ribs 332 are vertically arranged between the two inner walls of the sleeve to effectively support the sleeve and improve the service durability.

[0044] In some embodiments of the present utility model, the isolation support member 320 is made of ceramic fiber material. The isolation support member 320 has good heat resistance characteristics. During the heating process of the heating component 310, the isolation support member 320 is not easily damaged and can separate the heating component 310 and the vacuum heat preservation member 330 to prevent the vacuum heat preservation member 330 from being damaged when the heating component 310 generates heat.

[0045] In some embodiments of the present utility model, as Figure 5As shown, the electrothermal insulation device further includes a first temperature detection module 700 and a second temperature detection module 800. The first temperature detection module 700 is disposed between the inner container 200 and the heating component 310, and the second temperature detection module 800 is disposed between the isolation support member 320 and the vacuum insulation member 330.

[0046] Both the first temperature detection module 700 and the second temperature detection module 800 can be devices such as thermocouples, temperature sensors, NTC thermistors, etc. The first temperature detection module 700 is used to detect the temperature condition at a position near the inner container 200, for reflecting the temperature of the inner container 200 being heated and the insulation temperature after the heating component 310 stops heating. While the second temperature detection module 800 can detect the temperature near the vacuum insulation member 330. When the temperature near the vacuum insulation member 330 is too high, the heating component 310 is shut down in time to prevent damage to the vacuum insulation member 330.

[0047] Specifically, the control module 400 is respectively connected to the first temperature detection module 700, the second temperature detection module 800, and the heating component 310.

[0048] The control module 400 controls the operation of the heating component 310 according to the temperature conditions fed back by the first temperature detection module 700 and the second temperature detection module 800. In the heating state, when the first temperature detection module 700 detects that the temperature is too high, the heating temperature of the heating component 310 is reduced. While in the insulation state, when the first temperature detection module 700 detects that the temperature is too low, the control module 400 controls the heating component 310 to start heating. In the heating state, when the second temperature detection module 800 detects that the temperature is too high, the control module 400 controls the heating component 310 to stop and gives an alarm to remind the user to notify the maintenance personnel for maintenance.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0050] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric heating and heat preservation device, characterized in that: include: shell; An inner liner having an accommodating cavity with an opening facing upward, and the inner liner is arranged in the outer shell; The heating and heat preservation module is located between the inner wall surface of the outer shell and the outer wall surface of the inner tank. The heating and heat preservation module includes a heating component, an isolation support component and a vacuum insulation component from the inside to the outside. The heating component is arranged around the outer wall of the inner tank. A vacuum cavity is arranged in the vacuum insulation component. The vacuum insulation component is sleeved on the inner tank. The isolation support component is used to separate the heating component and the vacuum insulation component.

2. An electric heating and heat preservation device according to claim 1, characterized in that: The heating assembly includes a flexible, heat-conductive and insulating protective film and a heating element, wherein the heating element is arranged in the protective film.

3. An electric heating and heat preservation device according to claim 2, characterized in that: The protective film is attached to the outer wall of the inner container; the protective film is also attached to the bottom wall of the inner container.

4. The electric heating and heat preservation device according to claim 2, characterized in that: The heating element is a graphene heating sheet or a semiconductor heating sheet.

5. The electric heating and heat preservation device according to claim 1, characterized in that: The vacuum insulation component comprises a rigid casing, the vacuum chamber is opened in the casing, a first elastic layer is arranged between the isolation support component and the casing, and a second elastic layer is arranged between the casing and the inner wall surface of the outer shell.

6. The electric heating and heat preservation device according to claim 5, characterized in that: The first elastic layer and the second elastic layer are made of rubber or resin.

7. The electric heating and heat preservation device according to claim 5, characterized in that: The casing is provided with a plurality of supporting ribs in the vacuum chamber, one end of the supporting ribs is connected to the inner wall of the casing close to the first elastic layer, and the other end of the supporting ribs is connected to the inner wall of the casing close to the second elastic layer.

8. The electric heating and heat preservation device according to claim 1, characterized in that: The isolation support member is made of ceramic fiber material.

9. The electric heating and heat preservation device according to claim 1, characterized in that: It also includes a first temperature detection module and a second temperature detection module, wherein the first temperature detection module is arranged between the inner container and the heating component, and the second temperature detection module is arranged between the isolation support component and the vacuum insulation component.

10. An electric heating and heat preservation device according to claim 9, characterized in that: It also includes a control module, which is connected to the first temperature detection module, the second temperature detection module and the heating component respectively.

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