Please select the most similar patent number from A, B, C and D. Which number is?
A cooling assembly (100) and a refrigeration device (1000) having same. The cooling assembly (100) comprises: a cooling box (1), a driving member (2), and a receiving member (3). The cooling box (1) comprises a storage chamber (a) for containing a cooling medium; the driving member (2) comprises a driver body (21) and a rotating shaft (22) rotatable with respect to the driver body (21); the driver body (21) can be fixedly connected to the cooling box (1) outside the cooling box (1) or in the cooling box (1); the receiving member (3) is used for fixing an object to be cooled (200); the rotating shaft (22) is connected to the receiving member (3) to drive the receiving member (3) to rotate; and at least a portion of the receiving member (3) protrudes into the storage chamber (a).
A: Disclosed is an engine cooling fan, the cooling fan comprising: a first blade shaft (100), a plurality of first blades (110) being provided on the first blade shaft (100); a second blade shaft (200), a plurality of second blades (210) being provided on the second blade shaft (200), and the first blade shaft (100) rotatably embedded within the second blade shaft (200); a drive motor, the drive motor being connected to the first blade shaft (100) to drive the first blade shaft (100) to rotate; and a torsion spring (300), with one end of the torsion spring (300) being connected to the first blade shaft (100) and the other end of the torsion spring (300) being connected to the second blade shaft (200). The cooling fan realizes width adjustable fan blades, meets the requirements of air flow for the engine, and generally reduces the overall fuel consumption of the vehicle. Meanwhile, further disclosed are a cooling fan assembly comprising the above-mentioned engine cooling fan and a vehicle having the cooling fan assembly.
B: A liquid cooling device (100) without using electricity comprises a refrigerating member, a cooling tank (2) for accommodating liquid to be cooled, a thermometer (4) provided on one side of the cooling tank (2) and a water flow switch (5) provided at the bottom of the cooling tank (2). The refrigerating member comprises a sealed casing (101) and refrigerating liquid (102) in the sealed casing (101). The liquid cooling device (100) can cool the liquid without using electricity, and it is simple to operate, cheap to manufacture and easy to use.
C: A cooling substrate, a cooling component, a display component, a resin pool component, and a 3D printer are provided. The cooling component comprises: a cooling substrate (3), a first high temperature resistant transparent medium (4), and a second high temperature resistant transparent medium (9); wherein the first high temperature resistant transparent medium (4) is disposed on an upper surface (31) of the cooling substrate (3), and the second high temperature resistant transparent medium (9) is disposed on a lower surface (32) of the cooling substrate (3). The cooling substrate (3) has a continuous hollow structure, such that a channel (3a) used for cooling liquid to flow through is formed between the cooling substrate (3) and the first high temperature resistant transparent medium (4) and the second high temperature resistant transparent medium (9). The cooling component has good heat dissipation ability, does not deform easily after being heated, and can ensure normal operations and printing precision of the printer.
D: Disclosed are a clamping device (10) and a vehicle-mounted support. The clamping device comprises a connecting assembly (20), a rotating member (30), and a clamping assembly (40), wherein the connecting assembly comprises a connecting member (201) and a transmission member (203), the transmission member comprises an accommodating cavity (2031) and an opening (2033) in communication with the accommodating cavity, and the connecting member is connected to a side of the transmission member away from the opening; the clamping assembly comprises a first clamping arm (401) and a second clamping arm (403), the first clamping arm and the second clamping arm are partially accommodated in the accommodating cavity and rotationally connected to the transmission member; and the rotating member is sleeved on the transmission member, the rotating member is in threaded connection with the transmission member, and when the rotating member is rotated, the rotating member moves in an axial direction of the transmission member so as to drive the first clamping arm and the second clamping arm to move relatively, such that ends, located outside the accommodating cavity, of the first clamping arm and the second clamping arm are close to each other or away from each other. The vehicle-mounted support comprises the clamping device and a vehicle-mounted clamp.
Answer: B