Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed are a sieve structure and a fruit and vegetable juice/pulp extractor using the sieve structure, wherein the sieve structure comprises an upper sieve (15) and a lower sieve (17), and a middle ring sieve (23) is further provided between the upper sieve (15) and the lower sieve (17). A shielding ring (33) is fixed on the middle ring sieve (23) and several notches (331) are provided on the shielding ring (33). The notches (331) are in a sieve hole region of the middle ring sieve and the aperture diameter of the sieve holes in the middle ring sieve is greater than the sieve holes of the upper sieve and the sieve holes of the lower sieve. The fruit and vegetable juice/pulp extractor using the sieve structure comprises an electric motor base (25) and a machine head (20), wherein a pulping and filtering apparatus is provided above the electric motor base (25). The pulping and filtering apparatus comprises the sieve structure and a screw drive mechanism.
A: Disclosed is an intelligent automatic conical net making machine. The net making machine comprises a net winding device (3) and a net binding device (4). The net winding device (3) comprises a filter screen winding shaft (3.1), a filter screen winding drum (3.3) and a net winding power device (3.2). The filter screen winding shaft (3.1) comprises a conical hollow shaft body, and a strip-shaped net binding hole is axially provided in the hollow shaft body. The filter screen winding drum (3.3) comprises two arc-shaped plates (3.5) hinged together, and the two arc-shaped plates (3.5) can be driven by the net winding power device (3.2) to be opened and closed along a hinged shaft to wrap the filter screen winding shaft (3.1) without shielding the net binding hole. The net binding device (4) comprises an automatic stapler (4.1) and a stapler base mould (4.5), and the stapler base mould (4.5) of the net binding device (4) can be inserted into the hollow shaft body of the filter screen winding shaft (3.1). The automatic stamper (4.1) can cooperate with the stapler bottom mould (4.5) through the net binding hole to complete a net binding operation. The equipment can stably and reliably finish the net supplying, feeding, winding and binding process, is smooth in equipment operation, and is suitable for popularization and industrial production in the industry.
B: Disclosed are a filter screen structure and an indoor unit (1). The filter screen structure comprises a filter screen installation channel (2) arranged on the indoor unit (1), and a filter screen (3) configured to be installed in the filter screen installation channel (2), wherein the filter screen installation channel (2) at least comprises an installation opening (20); the filter screen (3) can slide in and out of the filter screen installation channel (2) via the installation opening (20); and the side of the filter screen (3) that is close to the installation opening (20) in an installation state is provided with an extension portion (4) which extends towards the lower portion of the indoor unit (1) and allows a user to directly pull and remove the filter screen (3). When the filter screen structure needs to be cleaned and removed, the user can slide the whole filter screen (3) along the filter screen installation channel (2) merely by means of directly pulling the extension part (4) without needing to step on a stool or open a panel, such that the filter screen (3) slides outwards from the installation opening (20) and finally slides out of the filter screen installation channel (2), thereby greatly improving the convenience of removing the filter screen of the indoor unit.
C: Disclosed are a juicer sieve and a juicer. The sieve comprises a sieve opening changing area. The sieve opening changing area comprises a large sieve opening area (11) and a small sieve opening area (12), wherein the small sieve opening area (12) forms the base while the large sieve opening area (11) is provided in the small sieve opening area (12) and forms an interlocking engagement with the small sieve opening area (12). When operating the juicer, a force of air flowing through the sieve openings will constantly change, thereby extracting juice from a fruit pulp through the sieve using a method of alternating release and increase of pressure.
D: A vena cava filter with a double-layer filter net (2), comprising a retrieval part (1), a filter net (2), and a support rod (3), the retrieval part (1), the filter net (2), and the support rod (3) being formed by being cut as a whole, a retrieval hook (11) being arranged on the retrieval part (1), the filter net (2) comprising an upper layer filter net (21) and a lower layer filter net (22), the upper layer filter net (21) and the lower layer filter net (22) being connected by means of a connecting rod (23) between the filter net (2), the filter net (2) forming a spider web structure on the projection surface perpendicular to the central axis of the vena cava filter, the support rod (3) being formed of a plurality of first support rods (31) and a plurality of second support rods (32), the plurality of first support rods (31) extending out from the tail end of the lower layer filter net (22), the plurality of first support rods (31) extending outward and gradually turning in the direction of the retrieval part (1) to form a filter cavity (311) open at the top, the plurality of second support rods (32) extending downward from the proximal end of the retrieval part (1) to form a filter cavity (321) open at the bottom, and each second support rod (32) being fixedly connected to the upper layer filter net (21) and the lower layer filter net (22).
Answer: C