Please select the most similar patent number from A, B, C and D. Which number is?
A microbubble generator, comprising a water inlet pipe (10), and a housing (20) in threaded connection with the water inlet pipe (10), a gap being reserved and a first air inlet channel (51) being formed between threads; a pressure boost pipe (30) disposed in the housing (20), a gap being reserved and a second air inlet channel (52) in communication with the first air inlet channel (51) being formed between the pressure boost pipe (30) and the housing (20); and a bubble generation pipe (40) disposed in the housing (20), wherein a gap is reserved and a third air inlet channel (53) is formed between an end face of the bubble generation pipe (40) close to the pressure boost pipe (30) and a corresponding end face of the pressure boost pipe (30). The pressure boost pipe (30) comprises a first water inlet (31) and a first water outlet (32). The inner diameter of the first water outlet (32) is less than the inner diameter of the first water inlet (31), such that water pressure at the first water outlet (32) is greater than water pressure at the first water inlet (31), and thus the flow velocity at the first water outlet (32) is increased, and air passing through the three air inlet channels (51, 52, 53) is sucked into the bubble generation pipe (40) and is mixed with water to generate large bubbles. The housing (20) is also internally provided with a cutter (60), and the large bubbles are cut into microbubbles by the cutter (60).
A: An outflowing water control device comprises a housing (10), a water division body (20), and a water guide body (30). The housing (10) is provided with a water inflow end (11) and a water outflow end (12). A first cooperative portion is disposed on an inner wall of the housing (10) closing to the water inflow end (11). The water division body (20) is disc-shaped and an edge of the water division body (20) is provided with a first annular vertical plate (23). A second cooperative portion is disposed on the outer wall of the first annular vertical plate (23). A flow guide hole (21) that runs through is formed in the water division body (20). The water guide body (30) is cylindrical and comprises a first water outflow passage (31) and a second water outflow passage (32). A water inlet (311) of the first water outflow passage (31) is communicated with an upper space (33) of a water inlet (321) of a second water outflow passage (32). The water division body (20) is disposed on one side of the housing (10) close to the water inflow end (11). The first cooperative portion and the second cooperative portion can be connected in a relatively and rotatably cooperating manner, and are used for limiting to each other. The water guide body (30) is disposed on one side of the housing (10) close to the water outflow end (12). The water guide body (30) and the housing (10) are fixed to each other. The flow guide hole (21) is communicated with the first water outflow passage (31) or the second water outflow passage (32) along with the relative rotation between the a water division body (20) and the water guide body (30), so as to generate two kinds of air-borne water outflow sprays. The outflowing water control device has a compact structure, a small volume and good sealing performance.
B: A micro-bubble acquisition apparatus, comprising a first body (1), the first body (1) being provided with a water inlet channel (2), a water outlet channel, a vortex chamber (3) connecting the water inlet channel (2) with the water outlet channel, and an air inlet channel (11) in communication with the vortex chamber (3), the axis of the vortex chamber (3) and the axis of the water inlet channel (2) being offset, the vortex chamber (3) being provided with a water inlet (12) in communication with the water inlet channel (2), and the water inlet (12) being arranged on the side of the axis of water inlet channel (2) facing away from the axis of the vortex chamber (3). The present apparatus can reduce obstruction to the water flow whilst avoiding increasing the volume of the micro-bubble acquisition apparatus.
C: A composite filter cartridge (1), and a water purification device. The composite filter cartridge (1) comprises: a housing (10), internally provided with a filter cavity; an isolation assembly (20), arranged within the filter cavity, and separating the filter cavity into a first filter cavity (10a) and a second filter cavity (10b) which are independent of one another, the housing (10) being provided with a first water inlet (111) and a first water outlet (112) which are in communication with the first filter cavity (10a), and a second water inlet (113) and a second water outlet (114) which are in communication with the second filter cavity (10b); a first filter cartridge (30), arranged within the first filter cavity (10a), and located between the first water inlet (111) and the first water outlet (112); a second filter cartridge (40), arranged within the second filter cavity (10b), and located between the second water inlet (113) and the second water outlet (114).
D: A water purifier, comprising: a water purifier body (10), and a water faucet connector (30) connected to the water purifier body (10) via a calandria assembly (20). The water purifier body (10) is provided with a water purifier water inlet and a water purifier water outlet. The calandria assembly (20) at least comprises a calandria water inlet pipeline and a calandria water outlet pipeline. The water faucet connector (30) is at least provided with a first water inlet (31), a first water outlet (32), a second water inlet (33) and a second water outlet (34). The first water inlet (31) is connected to the first water outlet (32). The first water outlet (32) is connected to a first end of the calandria water inlet pipeline, and a second end of the calandria water inlet pipeline is connected to the water purifier water inlet; and the water purifier water outlet is connected to a first end of the calandria water outlet pipeline, a second end of the calandria water outlet pipeline is connected to the second water inlet (33), and the second water inlet (33) is connected to the second water outlet (34). The water purifier has the advantages of simplifying an installation process and improving installation efficiency.
Answer: B