阅读说明：本技术 一种基于热管技术的双层便携冷热餐盒装置 (Double-layer portable cold and hot dining box device based on heat pipe technology ) 是由 王文豪 袁嘉欣 刘建锟 纪子平 于 2021-10-19 设计创作，主要内容包括：本发明涉及一种冷热餐盒技术领域,尤指一种基于热管技术的双层便携冷热餐盒装置,包括餐盒储存装置、加热制冷装置和供电控制装置,餐盒储存装置主要包括餐盒体、餐盒套件与保温结构,餐盒体包括上下连接组装的餐盒上盖与餐盒外壳,餐盒外壳在靠近底部处通过分隔带将餐盒外壳内部间隔分为上下两层空间,餐盒套件与保温结构安装在上层空间处,加热制冷装置安装在下层空间内；加热制冷装置主要包括热电元件和散热器；本发明整体结构紧凑、方便携带,而内部结构设计可实现饭菜的加热和保鲜功能,两种功能互相转换,保证饭菜的健康和口感,无需通过冰块蓄冷的方式保鲜,减轻质量；且在加热饭菜过程中不会出现过多的水蒸气,保证桌面与周边环境的洁净。(The invention relates to the technical field of a cold and hot meal box, in particular to a double-layer portable cold and hot meal box device based on a heat pipe technology, which comprises a meal box storage device, a heating and refrigerating device and a power supply control device, wherein the meal box storage device mainly comprises a meal box body, a meal box assembly and a heat insulation structure; the heating and refrigerating device mainly comprises a thermoelectric element and a radiator; the portable meal heating and fresh-keeping device is compact in overall structure and convenient to carry, the heating and fresh-keeping functions of the meal can be realized through the internal structural design, the two functions are mutually converted, the health and the taste of the meal are ensured, the fresh-keeping is realized without the cold accumulation of ice blocks, and the quality is reduced; and excessive water vapor can not appear in the process of heating the meal, so that the cleanness of the table top and the surrounding environment is ensured.)

1. A double-layer portable cold and hot lunch box device based on a heat pipe technology is characterized in that the cold and hot lunch box device mainly comprises a lunch box storage device, a heating and refrigerating device and a power supply control device, wherein the lunch box storage device mainly comprises a lunch box body, a lunch box external member and a heat insulation structure, the lunch box body comprises a lunch box upper cover and a lunch box shell which are connected and assembled up and down, a separation belt is arranged at the position close to the bottom of the lunch box shell, the inside of the lunch box shell is separated into an upper layer space and a lower layer space through the separation belt, the lunch box external member and the heat insulation structure are arranged at the upper layer space, and the heating and refrigerating device is arranged in the lower layer space; the heating and refrigerating device mainly comprises a thermoelectric element and a radiator, wherein the thermoelectric element is attached and connected below the heat preservation structure, and the radiator is connected below the thermoelectric element; the power supply control device is electrically communicated with the heat insulation structure through a power supply interface arranged on the housing of the lunch box.

2. A portable dual-layered hot and cold food box device based on heat pipe technology as claimed in claim 1, wherein the top cover of the food box is a cover structure covering and connecting to the housing of the food box, the top cover of the food box is provided with a through-going exhaust channel, and the exhaust channel is provided with a resilient safety valve, and the top cover of the food box is provided with a stirring fan facing the inside of the housing of the food box.

3. The double-layer portable cold and hot meal box device based on the heat pipe technology as claimed in claim 2, wherein the meal box shell is a cylindrical shell structure, and the interior of the meal box is a layered cavity structure; the division belt arranged on the lunch box is protruded inwards and horizontally from the inner wall of the lunch box shell to form a protruded circular division belt.

4. The portable hot and cold lunch box with double layers based on heat pipe technology as claimed in claim 3, wherein the thermal insulation structure comprises a thermal insulation filling layer and a double layer heat pipe inner tube, wherein the double layer heat pipe inner tube is a cylindrical cavity structure and is installed at the upper space of the lunch box housing through an inner tube fixing block, and the thermal insulation filling layer is filled between the inner wall of the lunch box housing and the double layer heat pipe inner tube.

5. A double-deck portable cold and hot dining box device based on heat pipe technology as claimed in claim 4, wherein said thermal insulation filling layer is a polyurethane material or rubber plastic material filling layer.

6. A portable hot and cold lunch box device with double layers based on heat pipe technology as claimed in claim 4, characterized in that the inner cylinder of the double-layer heat pipe is a cylindrical stainless steel sealed cavity with double-layer structure, and the sandwich between the double-layer structure is provided with a wick.

7. A portable hot and cold dual-layer dining box device based on heat pipe technology as claimed in claim 4, wherein the dining box set is mounted on the inner sidewall of the inner tube through a fixing block of the dining box set.

8. A dual-layered portable cooling and heating lunch box device based on heat pipe technology as claimed in claim 7, wherein said thermoelectric element is a thermoelectric semiconductor element, and the heat sink comprises an aluminum heat sink and a heat dissipation fan, wherein the thermoelectric semiconductor element is attached to the bottom of the inner tube of the dual-layered heat pipe, the aluminum heat sink is fixedly installed under the partition strip, and the heat dissipation fan is installed under the aluminum heat sink.

9. A portable hot and cold dual-layer lunch box device based on heat pipe technology as claimed in claim 8, wherein said lunch box case has an internal power supply interface and an external power supply interface, which are separately provided on the side walls of the lunch box case.

10. A dual-layered portable cooling and heating lunch box device based on heat pipe technology as claimed in claim 9, wherein said power supply control device mainly comprises a temperature sensor, a control panel, an internal power supply and an external power supply, wherein the internal power supply is connected to the internal power supply interface and electrically connected to the stirring fan, and the external power supply is connected to the external power supply interface and electrically connected to the thermoelectric semiconductor element, the temperature sensor and the cooling fan through the control panel.

Technical Field

The invention relates to the technical field of hot and cold meal boxes, in particular to a double-layer portable hot and cold meal box device based on a heat pipe technology.

Background

The existing electric heating heat preservation lunch box in the market has three types: one is a water injection type electric heating meal box, namely, a proper amount of water is added into the bottom layer of the meal box, and the food is steamed or insulated in a mode of generating steam through direct electric heating; the second type is a water injection free electric heating meal box, which generally adopts PTC heating components to directly heat food; the third type is cold and hot two warm cutlery boxes, puts into the cutlery box after freezing into the ice-cube with the water, and heat absorption in order to lower the temperature through melting of ice-cube reaches food fresh-keeping, and the ice-cube melts into rivers and to reach the container bottom, and the module that generates heat of bottom can carry out food heating again.

Although the above heating method can completely perform basic heating work, the water injection type electric heating lunch box and the cold and hot double-temperature lunch box use water or ice blocks, so that the volume and the mass of the lunch box are large; in addition, as steam is generated in the heating process, the water drops on the lunch box cover are too much, and a large amount of water drops drop when the lunch box is opened, so that water is accumulated in a meal area, and the taste is influenced; the heating wires are distributed in a snake shape and are heated unevenly; the heating wire is cylindrical, and the heated bottom surface of the lunch box is plane, so that the contact area is limited. Besides uneven heating, the water-injection-free heat-preservation lunch box can only be arranged in a single layer due to a direct heating mode, so that the capacity of the lunch box is limited. In addition, the two types of electric heating meal boxes only have a heating function and do not have a low-temperature preservation function, and are not suitable for long-time preservation of meals in places without refrigerators.

Disclosure of Invention

In order to solve the above problems, the present invention discloses a cooling and heating lunch box, and particularly relates to a double-layer portable cooling and heating lunch box device based on heat pipe technology.

In order to achieve the purpose, the invention adopts the technical scheme that: a double-layer portable cold and hot lunch box device based on a heat pipe technology is characterized in that the cold and hot lunch box device mainly comprises a lunch box storage device, a heating and refrigerating device and a power supply control device, wherein the lunch box storage device mainly comprises a lunch box body, a lunch box external member and a heat insulation structure, the lunch box body comprises a lunch box upper cover and a lunch box shell which are connected and assembled up and down, a separation belt is arranged at the position close to the bottom of the lunch box shell, the inside of the lunch box shell is separated into an upper layer space and a lower layer space through the separation belt, the lunch box external member and the heat insulation structure are arranged at the upper layer space, and the heating and refrigerating device is arranged in the lower layer space; the heating and refrigerating device mainly comprises a thermoelectric element and a radiator, wherein the thermoelectric element is attached and connected below the heat preservation structure, and the radiator is connected below the thermoelectric element; the power supply control device is electrically communicated with the heat insulation structure through a power supply interface arranged on the housing of the lunch box.

Preferably, the upper cover of the lunch box is a cover body structure which is connected to the housing of the lunch box in a covering manner, the upper cover of the lunch box is provided with a through exhaust passage, the exhaust passage is provided with an elastic safety valve, and the upper cover of the lunch box is provided with a stirring fan facing the inside of the housing of the lunch box.

Preferably, the housing of the lunch box is a cylindrical shell structure, and the interior of the housing is a layered cavity structure; the division belt arranged on the lunch box is protruded inwards and horizontally from the inner wall of the lunch box shell to form a protruded circular division belt.

Preferably, the insulation structure comprises an insulation filling layer and a double-layer heat pipe inner tube, wherein the double-layer heat pipe inner tube is of a cylindrical cavity structure and is arranged at the upper space of the lunch box shell through an inner tube fixing block, and the insulation filling layer is filled between the inner wall of the lunch box shell and the double-layer heat pipe inner tube.

Preferably, the heat-insulating filling layer is a polyurethane material or rubber plastic material filling layer.

Preferably, the double-layer heat pipe inner cylinder is a cylindrical stainless steel sealed cavity with a double-layer structure, and a liquid absorption core is arranged in an interlayer between the double-layer structure.

Preferably, the lunch box kit is installed on the inner side wall of the inner barrel through a lunch box kit fixing block.

Preferably, the thermoelectric element is a thermoelectric semiconductor element, the heat sink includes an aluminum heat sink and a heat dissipation fan, wherein the thermoelectric semiconductor element is attached to the bottom surface of the inner tube of the double-layer heat pipe, the aluminum heat sink is fixedly mounted below the partition belt, and the heat dissipation fan is mounted below the aluminum heat sink.

Preferably, the housing of the meal box is provided with an internal power interface and an external power interface, which are respectively arranged on the side wall of the housing of the meal box.

Preferably, the power supply control device mainly comprises a temperature sensor, a control panel, an internal power supply and an external power supply, wherein the internal power supply is connected to the internal power supply interface and electrically connected with the stirring fan, and the external power supply is connected to the external power supply interface and electrically connected with the thermoelectric semiconductor element, the temperature sensor and the cooling fan through the control panel.

The invention has the beneficial effects that: the portable meal heating and fresh-keeping device is compact in overall structure and convenient to carry, the heating and fresh-keeping functions of the meal can be realized through the internal structural design, the two functions are mutually converted, the health and the taste of the meal can be ensured, the fresh-keeping is not required in a mode of ice block cold accumulation, and the quality can be reduced; excessive water vapor can not be generated in the process of heating the meal, so that the cleanness of the table top and the surrounding environment is ensured; meanwhile, the working medium can flow in the cavity of the double-layer heat pipe inner cylinder, so that the rice and the dishes are uniformly heated. The thermoelectric element adopts the thermoelectric semiconductor element to realize the cold-heat conversion in the heat-preservation lunch box; the temperature uniformity of the inner cylinder of the double-layer heat pipe is utilized to ensure that the temperature of the meal is uniformly distributed.

Drawings

Fig. 1 is a sectional structural view of the present invention.

Fig. 2 is a top view of the fixing block of the lunch box set of the present invention.

Reference is made to the accompanying drawings in which: 1-lunch box storage device, 2-heating and refrigerating device, 3-power supply control device, 11-lunch box upper cover, 12-lunch box shell, 13-lunch box kit, 14-heat preservation structure, 15-internal power supply interface, 16-external power supply interface, 21-thermoelectric element, 22-aluminum radiator, 23-heat dissipation fan, 31-temperature sensor, 32-control board, 111-exhaust passage, 112-elastic safety valve, 113-stirring fan, 121-separation belt, 122-shell pad foot, 131-lunch box kit fixing block, 132-airflow circulation hole, 141-heat preservation filling layer, 142-double-layer heat pipe inner barrel, 143-inner barrel fixing block.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings:

a double-layer portable cold and hot lunch box device based on a heat pipe technology mainly comprises a lunch box storage device 1, a heating and refrigerating device 2 and a power supply control device 3,

the lunch box storage device 1 mainly comprises a lunch box body, a lunch box set 13 and a heat insulation structure 14, wherein the lunch box body comprises a lunch box upper cover 11 and a lunch box shell 12 which are connected and assembled up and down, a separation belt 121 is arranged at a position close to the bottom of the lunch box shell 12, the inside of the lunch box shell 12 is divided into an upper layer space and a lower layer space at intervals through the separation belt 121, the lunch box set 13 and the heat insulation structure 14 are arranged at the upper layer space, and the heating and refrigerating device 2 is arranged in the lower layer space; the upper cover 11 of the meal box is a cover body structure which is covered and connected on the outer shell 12 of the meal box, the upper cover 11 of the meal box is provided with a through exhaust passage 111, an elastic safety valve 112 is arranged on the exhaust passage 111, and the upper cover 11 of the meal box is provided with a stirring fan 113 facing the inner part of the outer shell 12 of the meal box; the elastic safety valve 112 is made of metal thin sheet or plastic buckle, one end is fixed at the upper cover 11 of the lunch box, the other end is an elastic movable end, when the internal pressure of the lunch box is larger than the resultant force of atmospheric pressure and elasticity, the elastic safety valve 112 is bounced open, the internal gas is exhausted to the external environment through the exhaust passage 111, the stirring fan 113 promotes the gas in the cylinder to flow, so that the temperature is more uniform;

the lunch box shell 12 is of a cylindrical shell structure, and the interior of the lunch box shell is of a layered cavity structure; the division belt 121 arranged on the lunch box is protruded inwards and horizontally from the inner wall of the lunch box shell 12 to form a protruded annular division belt 121; the periphery of the lower part of the lunch box shell 12 is provided with an air inlet and outlet, and the bottom surface of the lunch box shell 12 is also provided with a shell pad 122; the lunch box suite 13 can be a movable part and is arranged on the inner side wall of the inner barrel through a lunch box suite fixing block 131; the lunch box kit fixing block 131 is of a circular block structure, and an airflow circulation hole 132 is formed in the lunch box kit fixing block; the lunch box set 13 can be formed into a frame-shaped bracket structure; the heat insulation structure 14 comprises a heat insulation filling layer 141 and a double-layer heat pipe inner cylinder 142, wherein the double-layer heat pipe inner cylinder 142 is a cylindrical cavity structure and is installed at the upper space of the lunch box shell 12 through an inner cylinder fixing block 143, and the heat insulation filling layer 141 is filled between the inner wall of the lunch box shell 12 and the double-layer heat pipe inner cylinder 142; the inner tube fixing blocks 143 are fixedly mounted on the dividing strip 121, and at least two inner tube fixing blocks are arranged to fix the double-layer heat pipe inner tube 142 in a clamping manner; the heat-insulating filling layer 141 is a polyurethane material or rubber plastic material filling layer; the double-layer heat pipe inner cylinder 142 is a cylindrical stainless steel sealed cavity with a double-layer structure, and a liquid absorption core is arranged in an interlayer between the double-layer structures; the inner part of the double-layer heat pipe inner cylinder 142 can be injected with heat exchange working medium after being vacuumized, the selectable working medium is ethanol solution, the working temperature range is 0-85 ℃, the liquid absorption core arranged in the double-layer sandwich cavity can provide capillary force to drive the working medium in the cavity to circularly flow, and the main form comprises but is not limited to sintering powder, etching or laser unprocessed microgrooves or the combination of the sintering powder and the etching or laser unprocessed microgrooves; the outer side of the double-layer heat pipe inner barrel 142 is welded and connected with an inner barrel fixing block 143, and the inner part of the outer side of the double-layer heat pipe inner barrel 142 is welded and installed with a lunch box set fixing block 131; the lunch box shell 12 is provided with an internal power interface 15 and an external power interface 16 which are respectively arranged on the side wall of the lunch box shell 12;

the heating and refrigerating device 2 mainly comprises a thermoelectric element 21 and a radiator, wherein the thermoelectric element 21 is attached and connected below the heat preservation structure 14, and the radiator is connected below the thermoelectric element 21; the thermoelectric element 21 is a thermoelectric semiconductor element, the radiator comprises an aluminum radiator 22 and a radiating fan 23, wherein the thermoelectric semiconductor element is attached to the bottom surface of the double-layer heat pipe inner cylinder 142 and used for heating or cooling working media in a double-layer sandwich cavity of the inner cylinder, one end of the thermoelectric semiconductor element is tightly contacted with the bottom of the double-layer heat pipe inner cylinder 142, the other end of the thermoelectric semiconductor element is tightly contacted with the aluminum radiator 22 and fixed with the lunch box shell 12 through bolts, and heat-conducting silicone grease is coated on two sides of the thermoelectric semiconductor element to reduce heat-conducting resistance; the aluminum radiator 22 is fixedly arranged below the division belt 121, and the cooling fan 23 is arranged below the aluminum radiator 22; the heat radiation fan 23 is installed at the bottom of the aluminum heat radiator 22 in a downward blowing mode and exchanges heat with the outside through the exhaust holes;

the power supply control device 3 is electrically communicated with the heat insulation structure 14 through a power supply interface arranged on the lunch box shell 12; the power supply control device 3 mainly comprises a temperature sensor 31, a control panel 32, an internal power supply and an external power supply, wherein the internal power supply is connected to the internal power supply interface 15 and electrically connected with the stirring fan 113, and the external power supply is connected to the external power supply interface 16 and electrically controlled and connected with the thermoelectric semiconductor element, the temperature sensor 31 and the cooling fan 23 through the control panel 32; the external power interface 16 can be arranged at the lower part of the lunch box shell 12, the control board 32 is arranged on the inner wall of the lunch box shell 12 and is used for controlling the direction and the magnitude of direct current passing through the thermoelectric semiconductor element, the on-off of a direct current power supply and the work of the stirring fan 113, the temperature sensor 31 is used for collecting the temperature of the outer wall of the double-layer heat pipe inner cylinder 142, and the internal power interface 15 is used for electrifying the upper cover 11 of the lunch box so as to ensure that the stirring of the upper cover 11 of the lunch box normally works; the power supply control device 3 further comprises an adapter, a power interface, a power indicator, a socket and a positive-negative conversion module, wherein the adapter is used for providing a 12V direct-current power supply, the power interface at the bottom of the lunch box shell 12 is connected with the adapter, the socket is used for connecting the upper cover 11 of the lunch box with the lower part of the lunch box shell 12, and the positive-negative conversion module is used for changing the current direction of the thermoelectric semiconductor element.

The heating workflow of this example is as follows:

firstly, the external power supply interface 16 supplies power to the cold and hot lunch box device, the control panel 32 controls the external power supply to supply direct current to the thermoelectric semiconductor element, the element forms a hot end and a cold end due to the Peltier effect, wherein, one side of the element contacting with the outer bottom of the double-layer heat pipe inner cylinder 142 becomes the hot end, the cold end of the other side, namely the outer bottom of the double-layer heat pipe inner cylinder is an evaporation section, the top in the cavity is a condensation section, the thermoelectric semiconductor element provides heat through the Joule effect, and can absorb the heat in the air through the cold end and transfer the heat to the hot end, the efficiency can be higher than the direct electric heating, thereby improving the heating efficiency and the heating capacity of the lunch box;

because the temperature of the outer bottom of the inner cylinder 142 of the double-layer heat pipe rises, the liquid working medium collected at the bottom of the double-layer sandwich cavity of the inner cylinder absorbs heat and evaporates into a gaseous working medium, the gaseous working medium flows to the top of the cavity under the driving of pressure difference, the gaseous working medium exchanges heat with the gas in the lunch box at the top and is condensed into liquid, and the liquid flows back to the bottom of the heat pipe along the liquid absorption core under the capillary force, and the process is repeated and circulated continuously;

the heat pipe has the advantage of high heat transfer efficiency, heat can be transferred quickly, and accordingly temperature difference of each section of the heat pipe is reduced, namely the double-layer heat pipe inner cylinder 142 has temperature uniformity and the temperature of each point is more uniform, when the temperature measured by the temperature sensor 31 is less than 1 ℃ within 60-65 ℃ and 3 minutes, the current control module reduces the current to 1-2A to preserve heat of meal, so that excessive heating is avoided, in addition, in order to prevent explosion of a meal containing area caused by gas expansion in the heating process, the elastic safety valve 112 is installed at the upper end of the meal box upper cover 11, and when the pressure reaches a certain limit, the safe elastic valve automatically bounces to exhaust.

The working flow of the refrigeration and preservation of the embodiment is as follows:

when direct-current voltage is applied to two ends of the thermoelectric semiconductor element, heat is released from the heat absorption side of one side of the element, and refrigeration or heating can be realized by utilizing the heat of the heat absorption or heat release side, wherein the working principles of thermoelectric refrigeration and thermoelectric heating are similar and are two different purposes of the same system, but the thermoelectric heating efficiency is higher than that of the thermoelectric refrigeration;

by changing the current direction of the thermoelectric semiconductor element, the side of the thermoelectric semiconductor element, which is in contact with the double-layer heat pipe inner cylinder 142, becomes a cold end, the bottom of the double-layer heat pipe inner cylinder 142 becomes a condensation section, and the top in the cavity becomes an evaporation section. Because the top temperature in the cavity is higher than the bottom, the liquid working medium in the top liquid suction core evaporates, and under the action of heat, the gas at the top in the cavity flows to the bottom, the gaseous working medium is condensed at the bottom surface, and the condensation heat is taken away by the cold surface of the thermoelectric semiconductor, so that the gaseous working medium is changed into the liquid working medium, and under the capillary suction action of the liquid suction core, the liquid working medium flows back to the top evaporation section again, and the heat at the top is continuously transferred to the bottom. After the working medium is uniformly distributed, the temperature of the upper part of the heat pipe is 8-12 ℃, so that the food is kept fresh; at this time, the hot surface of the thermoelectric semiconductor element is still in contact with the aluminum heat sink 22, and the heat generated by the hot surface of the element is forced to flow by the fan in the heat sink, and is blown to the environment through the air vent at the side of the lunch box.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, and those skilled in the art may make modifications and variations within the spirit of the present invention, and all modifications, equivalents and modifications of the above embodiments according to the technical spirit of the present invention are within the scope of the present invention.