Portable refrigerator

Abstract

The refrigerator is formed by assembling a middle shell, an inner container, a compressor, an upper cover and a lower cover in sequence, a containing box used for containing a power source device is arranged in the lower cover, a plurality of Type-C interfaces are formed in the inner side wall of the containing box and connected in parallel, and the Type-C interfaces are connected in parallel. A plurality of Type-C interfaces are fixedly arranged in the lower cover, a PCB electrically connected with the Type-C interfaces is fixedly arranged in the lower cover, the output end of the PCB is electrically connected with the compressor, and the Type-C interfaces connected in parallel are arranged and can be connected with an adapter or a power bank to supply power to the portable refrigerator. According to the design of the external power supply, a user can replace the power bank at any time, it is ensured that the refrigerator can continuously work in different scenes, using convenience and flexibility are greatly improved, and the portable refrigerator is endowed with the infinite cruising ability.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerator devices, in particular to a portable refrigerator. Background Art

[0002] At present, the common names of portable refrigerators on the market are: car refrigerators, portable insulation boxes. The main technical solutions for portable refrigerators to achieve constant temperature are: compression refrigeration, semiconductor constant temperature, and phase change material constant temperature. Compression refrigeration has the highest energy efficiency ratio among various technical solutions; energy efficiency ratio = refrigerating capacity / circuit power consumption for achieving constant temperature. The energy efficiency ratio of compression refrigeration is 1.3 - 3.5, the energy efficiency ratio of semiconductor refrigeration does not exceed 0.6, and the most common phase change material for constant temperature is ice cubes. By using the heat absorption of ice melting into water, ice cubes are placed in the insulation box, the outer shell of the insulation box absorbs heat, the ice cubes dissolve and absorb heat, and the temperature inside the box is constant. After all the ice has dissolved, the constant temperature effect is lost; living biological tissues usually cannot freeze, and phase change materials above 0°C need to be used for constant temperature.

[0003] Portable refrigerators using compression refrigeration usually use a vehicle cigarette lighter for power supply or are powered by a self - contained battery. There are very few varieties of portable refrigerators powered by self - contained batteries. Due to the lack of matching between the internal resistance of the power supply battery and the compressor motor, a battery of about 1KG can only provide power for the compressor for 4 hours after being fully charged, and the endurance ability is insufficient. Content of the Utility Model

[0004] (1) Technical Problem

[0005] The utility model provides a portable refrigerator, which solves the problem of insufficient endurance of traditional self - contained battery - powered refrigerators by setting a Type - C interface and using a power bank for charging.

[0006] (2) Technical Content

[0007] To solve the above - mentioned technical problem, the technical solution of the utility model is: a portable refrigerator, which is successively assembled by a middle shell, an inner liner, a compressor, an upper cover and a lower cover. A placement box for accommodating a power supply device is arranged inside the lower cover. Multiple Type - C interfaces are arranged on the inner side wall of the placement box, and the multiple Type - C interfaces are connected in parallel. A PCB board electrically connected to the multiple Type - C interfaces is fixedly arranged inside the lower cover, and the output end of the PCB board is electrically connected to the compressor.

[0008] Furthermore, a door panel is hinged on the outside of the placement box.

[0009] Furthermore, the power supply device adopts an adapter or a power bank.

[0010] Furthermore, a display panel is arranged on the front of the lower cover.

[0011] Furthermore, a handle is rotatably arranged on the upper part of the middle shell.

[0012] (3) Technical effects

[0013] The advantages of the present utility model compared with the prior art are as follows: By providing multiple parallel Type-C interfaces, an adapter or a power bank can be connected to supply power to the portable refrigerator. The design of an external power supply enables users to replace the power bank at any time, ensuring that the refrigerator can continuously operate in different scenarios, greatly improving the convenience and flexibility of use, and endowing the portable refrigerator with unlimited battery life. A placement box is provided inside the lower cover to accommodate the power supply device, which not only does not occupy additional external space but also makes the overall structure of the refrigerator more compact, facilitating carrying and storage. Description of the drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of a portable refrigerator of the present utility model.

[0015] Figure 2 is an exploded structural schematic diagram of a portable refrigerator of the present utility model.

[0016] Figure 3 is a circuit structural schematic diagram of a portable refrigerator of the present utility model.

[0017] As shown in the figure: 1. Middle shell; 2. Inner liner; 3. Compressor; 4. Upper cover; 5. Lower cover; 6. Placement box; 7. Type-C interface; 8. PCB board; 9. Door panel; 10. Display panel; 11. Handle. Detailed implementation manners

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc. 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 structure and operation, and thus should not be construed as a limitation to the present utility model.

[0019] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "provided with", "installed", "connected", "coupled", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. 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.

[0020] The following further describes the present utility model in detail with reference to the drawings.

[0021] Combined with the attached Figure 1 to the attached Figure 3 , a portable refrigerator, which is composed of a middle shell 1, an inner liner 2, a compressor 3, an upper cover 4 and a lower cover 5 assembled in sequence. The inner liner 2 is fixedly arranged inside the middle shell 1, the compressor 3 is fixedly arranged at the bottom of the middle shell 1, and the lower cover 5 adopts a shell structure with an open upper end and is used to wrap and accommodate the compressor 3 when fixed to the middle shell 1. A placement box 6 for accommodating a power supply device is arranged inside the lower cover 5. A plurality of Type-C interfaces 7 are arranged on the inner side wall of the placement box 6, and the plurality of Type-C interfaces 7 are connected in parallel. A PCB board 8 electrically connected to the plurality of Type-C interfaces 7 is fixedly arranged inside the lower cover 5, and the output end of the PCB board 8 is electrically connected to the compressor 3.

[0022] A door panel 9 is hinged on the outside of the placement box 6, and the power supply device adopts an adapter or a power bank.

[0023] A display panel 10 is arranged on the front of the lower cover 5, and a handle 11 is rotatably arranged on the upper part of the middle shell 1.

[0024] By setting a plurality of parallel Type-C interfaces in the present utility model, an adapter or a power bank can be connected to supply power to the portable refrigerator. The design of external power supply enables users to replace the power bank at any time, ensuring that the refrigerator can continue to work in different scenarios, greatly improving the convenience and flexibility of use, and endowing the portable refrigerator with infinite battery life.

[0025] The common DC brushless BLDC refrigeration compressor has a power of 50W. By reducing the speed, the average power of the compressor can be reduced to 25 - 30W, which is lower than the power supplied by the power bank. However, the starting current of the compressor is the working voltage of 12V divided by the coil resistance of the motor, and the starting current is much larger than 3.2A. The standard USB Type-C can output 12V 35W, but with overcurrent protection measures. Once the current exceeds 3.2A, the power output stops. To solve this problem, the following two methods can be adopted:

[0026] 1. Add a super capacitor (farad capacitor) to the circuit of the PCB board. Refer to the attached Figure 3 . Before the compressor starts, charge the super capacitor first. At the moment when the compressor starts, discharge the super capacitor to start the compressor, so as not to trigger the overcurrent protection function of the power bank, and enable the power bank to supply power for the operation of the compressor. Only a small number of common power bank USB Type-C outputs 12V 3.2A, and most outputs are 12V 1.6A. In the present utility model, multiple Type-Cs are used for parallel power supply, and the super capacitor (farad capacitor) is charged through the parallel power supply circuit to drive the compressor. The specification of the super capacitor is 10F farad with a withstand voltage of 2.7V.

[0027] 2. Design the USB Type-C of the power bank to be able to output a power of 60W or above. The super capacitor in the circuit can be cancelled, and the power bank directly supplies power to the compressor.

[0028] The above describes the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural manners and embodiments similar to the technical solution without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A portable refrigerator, which is assembled in sequence by a middle shell (1), an inner liner (2), a compressor (3), an upper cover (4) and a lower cover (5), and is characterized in that: Inside the lower cover (5), there is a placement box (6) for accommodating a power supply device. On the inner side wall of the placement box (6), there are multiple Type-C interfaces (7), and the multiple Type-C interfaces (7) are connected in parallel. Inside the lower cover (5), a PCB board (8) electrically connected to the multiple Type-C interfaces (7) is fixedly provided, and the output end of the PCB board (8) is electrically connected to the compressor (3).

2. The portable refrigerator according to claim 1, wherein: A door panel (9) is hingedly provided on the outside of the placement box (6).

3. A portable refrigerator according to claim 1, characterized in that: The power supply device uses an adapter or a power bank.

4. A portable refrigerator according to claim 1, characterized in that: A display panel (10) is provided on the front of the lower cover (5).

5. The portable refrigerator according to claim 1, characterized in that: A handle (11) is rotatably provided on the upper part of the middle shell (1).

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