Semiconductor refrigeration fresh-keeping meal box

Abstract

The utility model provides a semiconductor refrigeration fresh-keeping meal box which comprises a shell, an inner container arranged in the shell, a box cover arranged on the shell and a refrigeration system, the refrigeration system comprises a cooling liquid storage box arranged at the bottom of the inner container, a spiral heat dissipation guide pipe wound around the inner container, a semiconductor refrigeration piece arranged on the cooling liquid storage box and a mute heat dissipation fan arranged on the semiconductor refrigeration piece. Heat of food in the inner container is evenly absorbed through the semiconductor chilling plate, the spiral heat dissipation guide pipe and cooling liquid in the spiral heat dissipation guide pipe, so that the food is evenly cooled, and the fresh-keeping effect is good; through the arrangement of the boost circuit module, the device can be powered by a low-voltage power supply, and is more efficient while the safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh-keeping lunch boxes, in particular to a semiconductor refrigeration fresh-keeping lunch box. Background Art

[0002] When traditional lunch boxes are used in summer or in environments with high temperatures, although they can preserve food, they will spoil in a short time. Therefore, lunch boxes that use semiconductor refrigeration technology to preserve food have emerged. Semiconductor refrigeration is a technology that uses the Peltier effect of semiconductor materials to achieve refrigeration. By applying current to semiconductor materials, heat transfer can be generated between two contact surfaces with different temperatures, making one side colder and the other side hotter. However, lunch boxes that use semiconductor technology to preserve food in the prior art cannot be cooled evenly, causing the food in the lunch box to be unevenly cooled and heated, and the preservation effect is poor. Summary of the invention

[0003] The purpose of the utility model is to provide a semiconductor refrigeration fresh-keeping lunch box to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A semiconductor refrigeration fresh-keeping lunch box, comprising:

[0006] An outer shell, wherein an inner liner is disposed in the outer shell, a refrigeration system for cooling and preserving items in the inner liner is disposed between the inner liner and the outer shell, and a box cover for opening or closing the inner liner is disposed on the outer shell; and

[0007] The refrigeration system includes a coolant storage box arranged at the bottom of the inner tank, a spiral heat dissipation duct coiled on the inner tank, a semiconductor refrigeration sheet arranged on the coolant storage box, a silent heat dissipation fan arranged on the semiconductor refrigeration sheet, a boost circuit module arranged on the silent heat dissipation fan, and a lithium battery arranged on the coolant storage box. After the lithium battery is boosted by the boost circuit module, it supplies power to the semiconductor refrigeration sheet and the silent heat dissipation fan, so that the semiconductor refrigeration sheet cools the coolant in the coolant storage box and the spiral heat dissipation duct, so that the spiral heat dissipation duct evenly cools the inner tank, and at the same time, the silent heat dissipation fan sends the heat generated by the semiconductor refrigeration sheet out of the outer shell.

[0008] Preferably, a power supply wire is connected between the lithium battery and the boost circuit module, and the power supply wire is used to enable the lithium battery to supply power to the boost circuit module.

[0009] Preferably, a heat dissipation port is provided at the bottom of the housing corresponding to the silent heat dissipation fan, so as to facilitate the silent heat dissipation fan to discharge air and dissipate heat.

[0010] Preferably, a charging socket is reserved on the side of the shell that wraps the lithium battery portion, and the charging socket is used to connect an AC power source to charge the lithium battery.

[0011] Preferably, the inner liner is made of 304 food grade stainless steel.

[0012] Preferably, the spiral heat dissipation conduit is made of stainless steel.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model uses the semiconductor refrigeration principle for refrigeration. The semiconductor refrigeration chip is small in size, light, thin and durable, has no refrigeration pollutants, has high refrigeration efficiency, is safe and hygienic, and evenly absorbs the heat of the food in the inner pot through the spiral heat dissipation duct and the coolant therein, so that the food is evenly cooled and the preservation effect is better. The setting of the boost circuit module allows the utility model to use a low-voltage power supply, ensuring safety and being more efficient;

[0015] 2. The utility model uses a silent cooling fan to dissipate heat for the semiconductor cooling sheet, so that it can work for a long time and continue to cool;

[0016] 3. The utility model uses a boost circuit module as a converter, which can adjust the output voltage and current, and then control the fan speed, thereby increasing or reducing the heat dissipation efficiency of the semiconductor refrigeration sheet, achieving the effect of adjustable refrigeration temperature;

[0017] 4. The utility model uses lithium batteries to power the device, which can provide a safe low-voltage power supply and can provide power for a long time, achieving a long-term continuous cooling effect;

[0018] 5. The utility model provides a charging socket so that the fresh-keeping lunch box can be used both indoors and outdoors without generating discarded batteries, which is environmentally friendly and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model after removing the outer shell and the box cover.

[0021] In the figure: 1. Box cover; 2. Outer shell; 3. Inner liner; 4. Spiral heat dissipation duct; 5. Coolant storage box; 6. Semiconductor refrigeration plate 7. Silent cooling fan; 8. Boost circuit module; 9. Lithium battery; 10. Power supply wire; 11. Charging socket; 12. Heat dissipation port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 to Figure 2 , the utility model provides a technical solution:

[0024] A semiconductor refrigeration fresh-keeping lunch box, comprising:

[0025] An outer shell 2 is provided with an inner liner 3 inside the outer shell 2. A groove is provided in the inner liner 3 for placing food. The inner liner 3 is made of 304 stainless steel so that it can directly contact the food. The outer shell 2 and the inner liner are fixedly connected by setting screws or gluing, and a box cover 1 is set on the outer shell 2. The box cover 1 is provided with threads that match the threads set on the box cover 1, so that the box cover 1 can be fixedly connected to the outer shell 2 by rotation to isolate the inner liner 3 from the outside world, or the box cover 1 can be removed from the outer shell 2 by reverse rotation to connect the inner liner 3 with the outside world. The user can put food and other items into the inner liner 3. A gap is left between the inner liner 3 and the outer shell 2 for installing a refrigeration system for cooling and preserving the items in the inner liner 3.

[0026] The refrigeration system includes a coolant storage tank 5, a spiral heat dissipation pipe 4, a semiconductor refrigeration sheet 6, a silent heat dissipation fan 7, a boost circuit module 8, a power supply wire 10, a lithium battery 9 and a coolant. The coolant storage tank 5 is arranged on the outer bottom wall of the inner tank 3. The coolant storage tank 5 is fixedly connected to the outer bottom wall of the inner tank 3 by setting screws or gluing. The spiral heat dissipation pipe 4 is spirally wound on the outer side wall of the inner tank 3. One end of the spiral heat dissipation pipe 4 is connected to the coolant storage tank 5, so that the cavity in the spiral heat dissipation pipe 4 is connected to the cavity in the coolant storage tank 5. The coolant is arranged in the spiral heat dissipation pipe 4 and the coolant storage tank 5. The liquid is prepared by antibacterial agent, preservative, surfactant and distilled water. The antibacterial agent can be sodium hypochlorite, the preservative can be sodium benzoate, and the active agent component can be ethylene glycol and glycol. The semiconductor refrigeration sheet 6 is arranged at the bottom of the coolant storage box 5 and is fixedly connected to the bottom wall of the coolant box by setting screws or gluing. The semiconductor refrigeration sheet 6 is TEC1-12715T125 with an operating voltage of 12V, a maximum input current of 15A, a maximum operating voltage of 15.2V, a maximum temperature difference of 67℃, a maximum power of 148.6Qm, a resistance range of 0.80~0.90R(Ω), and a size specification of 40X40X3.0mm, the silent cooling fan 7 is arranged on the semiconductor cooling sheet 6, the silent cooling fan 7 is fixedly connected with the semiconductor cooling sheet 6 by setting screws or gluing, the silent cooling fan 7 is located below the semiconductor cooling sheet 6, the silent cooling fan 7 has a size of 40X40X10mm, the working voltage is 12V, and the semiconductor cooling sheet 6 and the silent cooling fan 7 are filled with thermal conductive silicone grease for improving the thermal conductivity, the boost circuit module 8 is arranged on the side wall of the silent cooling fan 7 housing 2, and the boost circuit module 8 is connected with the silent cooling housing 2 by setting screws, etc. The boost circuit module 8 can be a DC-DC boost module of Shenzhen Yuejialei Electronics Co., Ltd. The boost circuit module 8 is an adjustable 5V to 12V boost circuit module 8, which converts the 5V power supply voltage into a 12V power supply voltage. The input and output lines of the silent cooling fan 7 and the semiconductor refrigeration sheet 6 are respectively connected to the two pairs of input and output points of the boost circuit module 8. The lithium battery 9 is arranged on the bottom wall of the coolant storage box 5. The lithium battery 9 is fixedly connected to the bottom wall of the coolant storage box 5 by setting screws or gluing. The lithium battery 9 is a switchable 5V 5000 mAh rechargeable lithium battery 9, one end of the power supply wire 10 is connected to the lithium battery 9, and the other end is connected to the boost circuit module 8, so that the lithium battery 9 supplies power to the boost circuit module 8, and a heat dissipation port 12 is provided at the bottom of the shell 2 corresponding to the silent cooling fan 7, so that the silent cooling fan 7 can discharge the hot air from the heat dissipation port 12 out of the shell 2, and a charging socket 11 is left on the side of the part of the shell 2 that wraps the lithium battery 9. The charging socket 11 is a USB socket, and the AC power supply can be connected to the charging socket 11 to charge the lithium battery 9. The lithium battery 9 is used to The boost circuit module 8 supplies power to increase the voltage from 5V to 12V, and then the boost circuit module 8 supplies power to the silent cooling fan 7 and the semiconductor cooling sheet 6 respectively, so that the silent cooling fan 7 and the semiconductor cooling sheet 6 start to work and refrigerate. By performing uninterrupted heat exchange on the coolant storage tank 5, the temperature of the coolant in the coolant storage tank 5 and the spiral heat dissipation duct 4 is reduced, the inner pot 3 is evenly cooled, and the heat of the food in the inner pot 3 is absorbed to achieve the effect of cooling and preserving. At the same time, the silent cooling fan 7 sends the heat of the semiconductor cooling sheet 6 out of the outer shell 2.

[0027] Working principle: When in use, the user puts food into the inner tank 3, covers the box cover 1, and connects the lithium battery 9. The lithium battery 9 transmits 5V DC to the boost circuit module 8 through the power supply wire 10. The 5V DC passes through the boost circuit module 8 and outputs 12V DC to supply power to the semiconductor refrigeration sheet 6 and the silent cooling fan 7. At this time, the semiconductor refrigeration sheet 6 is powered on for cooling, and absorbs the heat of the coolant in the coolant storage tank 5, so that the coolant in the coolant storage tank 5 remains in a low-temperature cooling state. Because the coolant storage tank 5 is connected to the spiral heat dissipation duct 4, the coolant in the spiral heat dissipation duct 4 also remains in a low-temperature cooling state, and the inner tank 3 is in full contact with the spiral heat dissipation duct 4, so that the inner tank 3 is continuously cooled, the heat of the food in the inner tank 3 is absorbed, and the low-temperature preservation of the food is achieved, and the silent cooling fan 7 rotates to dissipate heat, and the heat generated by the semiconductor refrigeration sheet 6 is sent out through the heat dissipation port 12, so that the semiconductor refrigeration sheet 6 remains cooled and works for a long time.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A semiconductor refrigeration fresh-keeping lunch box, characterized in that: include: An outer shell, wherein an inner liner is disposed in the outer shell, a refrigeration system for cooling and preserving items in the inner liner is disposed between the inner liner and the outer shell, and a box cover for opening or closing the inner liner is disposed on the outer shell; and The refrigeration system includes a coolant storage box arranged at the bottom of the inner tank, a spiral heat dissipation duct coiled on the inner tank, a semiconductor refrigeration sheet arranged on the coolant storage box, a silent heat dissipation fan arranged on the semiconductor refrigeration sheet, a boost circuit module arranged on the silent heat dissipation fan, and a lithium battery arranged on the coolant storage box. After the lithium battery is boosted by the boost circuit module, it supplies power to the semiconductor refrigeration sheet and the silent heat dissipation fan, so that the semiconductor refrigeration sheet cools the coolant in the coolant storage box and the spiral heat dissipation duct, so that the spiral heat dissipation duct evenly cools the inner tank, and at the same time, the silent heat dissipation fan sends the heat generated by the semiconductor refrigeration sheet out of the outer shell.

2. A semiconductor refrigeration fresh-keeping lunch box according to claim 1, characterized in that: A power supply wire is connected between the lithium battery and the boost circuit module, and the power supply wire is used to enable the lithium battery to supply power to the boost circuit module.

3. A semiconductor refrigeration fresh-keeping lunch box according to claim 1, characterized in that: A heat dissipation port is provided at the bottom of the housing corresponding to the silent heat dissipation fan, so as to facilitate the silent heat dissipation fan to discharge air and dissipate heat.

4. A semiconductor refrigeration fresh-keeping lunch box according to claim 1, characterized in that: A charging socket is reserved on the side of the shell that wraps the lithium battery portion, and the charging socket is used to connect an AC power source to charge the lithium battery.

5. The semiconductor refrigeration fresh-keeping lunch box according to claim 1, characterized in that: The inner tank is made of 304 food grade stainless steel.

6. The semiconductor refrigeration fresh-keeping lunch box according to claim 1, characterized in that: The spiral heat dissipation conduit is made of stainless steel.

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