A car refrigerator

Abstract

This utility model discloses a vehicle-mounted refrigerator, relating to the field of vehicle-mounted refrigerator technology. It includes an inner liner, an outer shell, a semiconductor cooling chip, a hot-end radiator, and a hot-end fan. The inner liner is installed on the inner wall of the outer shell. An air duct is provided on one side of the outer shell, and an air outlet is opened at the bottom of the outer shell. The semiconductor cooling chip is disposed inside the outer shell, and the hot-end radiator is installed on one side of the semiconductor cooling chip. The air duct is disposed around the hot-end radiator, and the hot-end fan is installed on one side of the air duct. This utility model guides and constrains the waste heat airflow generated by the hot end of the semiconductor cooling chip through the air duct, directing it from the bottom of the refrigerator towards the rear of the vehicle in a directional and concentrated manner. This design effectively avoids the disorderly diffusion of high-temperature waste heat inside the vehicle, especially preventing hot air from blowing directly onto passengers' legs. It solves the problem of decreased driving and riding experience caused by disturbing hot air in existing technologies, creating a more comfortable riding environment and effectively increasing passenger comfort.

Description

Technical Field

[0001] This utility model relates to the field of vehicle refrigerator technology, and in particular to a vehicle refrigerator. Background Technology

[0002] A car refrigerator is a portable refrigeration device designed specifically for mobile environments such as cars. It is mainly used for preserving or cooling food, beverages, medicines, and other items. According to type, it can be divided into compressor car refrigerators and semiconductor car refrigerators. Users, influenced by vehicle space limitations and the convenience of short-distance use, often choose semiconductor car refrigerators. The cooling principle of a semiconductor car refrigerator is based on a thermoelectric cooler (TEC). A TEC is a component that operates using the Peltier effect. When current passes through two different semiconductor materials inside the TEC, one side absorbs heat, and the other side releases heat. When the direction of current is reversed, the hot and cold sides of the TEC reverse; that is, the side that absorbed heat becomes the side that released heat, and the side that released heat becomes the side that absorbed heat. Based on this principle, a heat sink can be installed on the hot and cold sides of the TEC, and a fan can be used to direct airflow through the heat sink to produce cold or hot air, thus creating a refrigerator that heats or cools.

[0003] A search revealed Chinese patent application number 202421656280.7, which discloses a car refrigerator with temperature detection and automatic temperature adjustment. The refrigerator includes a cabinet, and a control device that supplies power to a temperature control device on the cabinet based on the temperature detected by an infrared temperature sensor and compared with the temperature of a thermometer, thereby achieving cooling or heating. The temperature control device includes a semiconductor cooling chip with heat dissipation fins, which dissipate heat through a fan. The aforementioned patent for a car refrigerator with temperature detection and automatic temperature adjustment has the following shortcomings: Existing devices use two fans simultaneously to blow air onto the radiators at both ends of the TEC (Transformer Electronic Control Unit). The airflow from one fan (cold end fan) circulates inside the refrigerator, while the airflow from the other fan (hot end fan) is directly discharged to the outside after passing through the radiator. The direct discharge of hot air from the hot end fan can cause discomfort by blowing hot air directly onto the feet of passengers. Furthermore, in summer or when cooling is needed, the car interior already requires air conditioning, and the hot air discharged from the refrigerator will exacerbate the stuffiness inside the car, further causing discomfort to passengers and severely reducing the comfort and experience of driving and riding. Therefore, optimization is needed to ensure driving and riding comfort. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vehicle-mounted refrigerator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A vehicle-mounted refrigerator includes an inner liner, an outer shell, a thermoelectric cooling chip, a hot-end radiator, and a hot-end fan. The inner liner is installed on the inner wall of the outer shell. An air duct is provided on one side of the outer shell, and an air outlet is provided at the bottom of the outer shell. The thermoelectric cooling chip is disposed inside the outer shell. The hot-end radiator is installed on one side of the thermoelectric cooling chip. The air duct is disposed around the hot-end radiator. The hot-end fan is installed on one side of the air duct, and the position of the hot-end fan is adapted to the position of the hot-end radiator.

[0006] As a further improvement of this utility model: the air duct has a symmetrical C-shaped structure, covering the top and left and right sides of the heat sink.

[0007] As a further improvement of this utility model: the outlet of the air duct faces the bottom of the outer casing, and the outlet of the air duct is connected to the air outlet at the bottom of the outer casing.

[0008] As a further improvement of this utility model: several sets of guide strips are arranged sequentially at the bottom of the inner liner, and several sets of guide strips are also arranged on the side wall of the inner liner.

[0009] As a further embodiment of this utility model: the shape of the guide strip is a strip-shaped protrusion, and the corners of the guide strip are arc-shaped, and they are arranged in parallel on the inner surface of the inner liner.

[0010] As a further improvement of this utility model: the fins of the hot-end heat sink are made of aluminum alloy, and the fins of the hot-end heat sink have wavy grooves.

[0011] As a further improvement of this utility model: the inner liner is made of high-density polyethylene, and the outer shell is made of ABS engineering plastic.

[0012] The beneficial effects of this utility model are as follows: 1. The air duct can guide and constrain the waste heat airflow generated by the hot end of the semiconductor cooling chip, causing it to be discharged directionally and centrally from the bottom of the refrigerator towards the rear of the vehicle. This design effectively avoids the disorderly diffusion of high-temperature waste heat in the vehicle compartment, and in particular prevents hot air from blowing directly onto the passengers' legs. It solves the problem of decreased driving experience caused by hot air disturbance in the existing technology, creating a more comfortable riding environment in the vehicle and effectively increasing the comfort of the ride.

[0013] 2. Several sets of guide strips on the bottom and side walls of the inner liner can raise the item when it is placed in the liner. After the item is raised, a tiny airflow channel is formed between the inner liner and the item. Cold air can flow through these channels, making the air circulation smoother and ensuring that the item can be cooled completely, preventing uneven temperature.

[0014] 3. The parallel arrangement of the guide strips, combined with the arc design at the corners, effectively reduces airflow resistance, allowing the cool air to circulate more smoothly in a specific direction, thereby effectively increasing the cooling efficiency and effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a vehicle-mounted refrigerator from a frontal perspective, as proposed in this utility model. Figure 2 This is a schematic diagram of the cross-sectional structure of a vehicle-mounted refrigerator proposed in this utility model; Figure 3 This is a top view structural diagram of a vehicle-mounted refrigerator proposed in this utility model; Figure 4 This is a schematic diagram illustrating the airflow direction within the air duct of a vehicle-mounted refrigerator according to the present invention. Figure 5 This is a schematic diagram of the heat dissipation section of a vehicle-mounted refrigerator proposed in this utility model.

[0016] In the diagram: 1. Inner liner; 2. Outer shell; 3. Air duct; 4. Hot end fan; 5. Hot end heat sink; 6. Airflow guide ribs; 7. Semiconductor cooling chip. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] Example 1 A type of car refrigerator, such as Figure 1-5 As shown, it includes an inner liner 1, an outer shell 2, a thermoelectric cooler 7, a hot-end heat sink 5, and a hot-end fan 4. The inner liner 1 is installed on the inner wall of the outer shell 2. An air duct 3 is provided on one side of the outer shell 2. An air outlet is opened at the bottom of the outer shell 2. The thermoelectric cooler 7 is installed inside the outer shell 2. The hot-end heat sink 5 is installed on one side of the thermoelectric cooler 7. The air duct 3 is arranged around the hot-end heat sink 5. The hot-end fan 4 is installed on one side of the air duct 3. The position of the hot-end fan 4 is adapted to the hot-end heat sink 5. In use, food and beverages can be placed in the space inside the inner liner 1. The hot-end fan 4 generates airflow, and the semiconductor cooling chip 7 is energized to cool the inner liner 1. The airflow generated by the hot-end fan 4 helps to cool the food and beverages placed inside the inner liner 1, thus refrigerating them. When the semiconductor cooling chip 7 is working, a large amount of waste heat is generated at the hot end. Existing technology directly blows the hot air away with a fan, which causes the heat to be directly discharged into the vehicle, resulting in secondary heating and an unpleasant experience. By adding the air duct 3, the airflow generated by the hot-end fan 4 can be constrained and guided. The waste hot air can be directionally discharged through the air duct and the air outlet at the bottom of the outer shell 2. The air duct 3 changes the natural diffusion path of the hot airflow, guiding the waste hot air from the bottom of the outer shell 2 to be concentrated and discharged towards the rear of the vehicle. This avoids the hot air being discharged in all directions and blowing onto the human body, causing a poor driving experience. At the same time, it prevents the hot air from interfering with the occupants, effectively improving comfort. To optimize heat dissipation performance, such as Figure 1 , 2 As shown in Figures 4 and 5, the air duct 3 has a symmetrical C-shaped structure, covering the top and left and right sides of the hot end heat sink 5. When in use, the C-shaped symmetrical air duct 3 can evenly wrap around the hot end heat sink 5, ensuring that the heat generated from the main surface of the hot end heat sink 5, "top and side fins", can be effectively captured and discharged into the air duct 3, avoiding local heat accumulation, improving heat dissipation efficiency, guiding airflow more smoothly, and reducing the generation of turbulence and eddies. To facilitate airflow, such as Figure 2 , 4 As shown, the outlet of the air duct 3 faces the bottom of the outer casing 2, and the outlet of the air duct 3 is connected to the air outlet at the bottom of the outer casing 2. When in use, hot air with low density will rise naturally. By designing the outlet of the air duct 3 to face the bottom, the forced power of the hot end fan 4 can overcome the natural rising trend of hot air and deliver it to the air outlet at the bottom of the outer casing 2, guiding it to the rear of the vehicle for directional exhaust, thus avoiding the impact on passengers inside the vehicle when exhausting waste heat. To make it easier to lift items, such as Figure 1 , 3 As shown, several sets of guide strips 6 are arranged sequentially at the bottom of the inner liner 1, and several sets of guide strips 6 are also arranged on the side wall of the inner liner 1. When in use, the several sets of guide strips 6 set on the bottom and side wall of the inner liner 1 can raise the item when it is placed. After the item is raised, a small airflow channel is formed between the inner liner 1 and the item. Cold air can flow through these channels, making the air circulation smoother and ensuring that the item can be cooled completely. This prevents uneven temperature and avoids the problem of low cooling efficiency and uneven temperature caused by the item being placed in close contact with the inner liner 1 and affecting the normal passage of cold air. To reduce airflow resistance, such as Figure 3 As shown, the guide rib 6 is a strip-shaped protrusion with arc-shaped corners, and is arranged in parallel on the inner surface of the inner liner 1. When in use, the parallel arrangement of the guide strips 6, combined with the arc design at their corners, can effectively reduce the resistance to airflow, allowing the cool air to circulate more smoothly in a specific direction, thereby effectively increasing the efficiency and effect of cooling. To increase heat dissipation efficiency, such as Figure 4 As shown, the fins of the hot-end heat sink 5 are made of aluminum alloy, and the fins of the hot-end heat sink 5 have wavy grooves. When in use, the fins of the heat sink 5, made of aluminum alloy, have good thermal conductivity, which can complete the temperature transfer more quickly. The wave-shaped grooves opened by the fins can continuously break the boundary layer of the air to generate turbulence, thereby greatly enhancing the heat exchange efficiency and maximizing the heat dissipation efficiency, thus ensuring the performance and life of the semiconductor cooling chip 7.

[0020] Example 2 To increase service life, refer to Figure 1 A vehicle refrigerator, in this embodiment, is improved compared to embodiment 1 as follows: the inner liner 1 is made of high-density polyethylene, and the outer shell 2 is made of ABS engineering plastic. When in use, the inner liner 1, made of high-density polyethylene, has excellent low-temperature performance. It can still maintain good toughness and strength at temperatures of tens of degrees below zero, without becoming brittle or cracking. It is also non-toxic and odorless, meets food hygiene standards, and will not react with food. The outer shell 2, made of ABS engineering plastic, has good impact resistance and is not easily deformed during use. It can effectively protect the internal components, effectively increase the service life, and avoid unnecessary damage.

[0021] The above description is only a preferred embodiment of the present utility model. For parts that do not require creative effort in circuit control, signal control and transmission, please refer to the prior art. However, the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vehicle-mounted refrigerator characterized by comprising: The device includes an inner liner (1), an outer shell (2), a thermoelectric cooler (7), a hot-end radiator (5), and a hot-end fan (4). The inner liner (1) is installed on the inner wall of the outer shell (2). An air duct (3) is provided on one side of the outer shell (2). An air outlet is provided at the bottom of the outer shell (2). The thermoelectric cooler (7) is installed inside the outer shell (2). The hot-end radiator (5) is installed on one side of the thermoelectric cooler (7). The air duct (3) is located around the hot-end radiator (5). The hot-end fan (4) is installed on one side of the air duct (3). The position of the hot-end fan (4) is adapted to the hot-end radiator (5).

2. A vehicle-mounted refrigerator according to claim 1, characterized in that, The air duct (3) has a symmetrical C-shaped structure, covering the top and left and right sides of the hot end heat sink (5).

3. A vehicle-mounted refrigerator according to claim 1, characterized in that, The outlet of the air duct (3) faces the bottom of the outer shell (2), and the outlet of the air duct (3) is connected to the air outlet at the bottom of the outer shell (2).

4. A vehicle-mounted refrigerator according to claim 1, characterized in that, The bottom of the inner liner (1) is provided with several sets of guide strips (6) arranged in sequence, and the side wall of the inner liner (1) is also provided with several sets of guide strips (6).

5. A vehicle-mounted refrigerator according to claim 4, characterized in that, The guide strip (6) is a strip-shaped protrusion with arc-shaped corners, and is arranged in parallel on the inner surface of the inner liner (1).

6. A vehicle-mounted refrigerator according to claim 1, characterized in that, The fins of the hot end heat sink (5) are made of aluminum alloy, and the fins of the hot end heat sink (5) have wavy grooves.

7. A vehicle-mounted refrigerator according to claim 1, characterized in that, The inner liner (1) is made of high-density polyethylene, and the outer shell (2) is made of ABS engineering plastic.

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