Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is an aerator, comprising a body (100), a flow divider (200) and an inserter (300). The flow divider (200) and the inserter (300) are mounted and connected in the body (100). An air suction hole (110) runs through the body (100). A water flow forms a jet flow under the action of the flow divider (200). The jet flow collides with the inserter (300) to incur an atomization effect and is mixed with air sucked by the air suction hole (110). The inserter (300) comprises a plurality of bottom layer division plates (310), a plurality of middle layer division plates (320), and a plurality of upper layer studs(330) fixedly connected together. Passages are formed between the adjacent bottom layer division plates (310) and between the adjacent middle layer division plates (320). A collision surface of the upper layer studs (330), a collision surface of the middle layer division plates (320), and a collision surface of the bottom layer division plates (310) form three layers separated in the direction (X). The aerator has the following advantages. The chance of jet flow collision is increased, the chance of multiple jet flow collisions is increased, the effect of water saving is excellent, and the water drops are plump.
A: Disclosed in the present invention is a bubbler capable of ensuring gas suction effect under low pressure comprises a main body (10), a gas-water mixer (20) and a flow splitter (30) both installed in the main body (10). The flow splitter (30) is provided with a plurality of flow splitting holes (31). A gas suction hole (11) is additionally arranged to suck the air from outside of the main body (10) into the main body (10). The bubbler is also provided with a constant open water line (40) and an open-close water line (50). An open-close member (60) is arranged on the open-close water line (50) in order to open the open-close water line (50) when the water flow pressure is greater than a predetermined water pressure and to close it when the water flow pressure is lower than the predetermined water pressure. All the flow splitting holes (31) are divided into at least a first portion and a second portion. The constant open water line (40) and the open-close water line (50) are independently connected with the first portion and the second portion respectively.
B: A filter assembly (600) comprises a filter support plate (610) and a filter (620). The filter support plate (610) comprises a bottom frame (611) and a support ring (612). The bottom frame (611) comprises a bottom plate (6111) and a support wall (6112). The support wall (6112) surrounds the periphery of the bottom plate (6111), and extends upwards. The support ring (612) is provided above the bottom frame (611). The support ring (612) is connected to the top portion of the support wall (6112), and extends in a horizontal direction facing away from a filter mounting cavity (6113). A portable water feeder comprising the filter assembly (600) further comprises a water storage cup (100) having an open end (111), a mounting cover (200), an opening and closing mechanism (300), a button mechanism (400), and a water receiving tank (500). The filter assembly (600) covers the open end (111). The mounting cover (200) is detachably mounted at the open end (111) of the water storage cup (100). The opening and closing mechanism (300) comprises a connection column (310) slidably passing through a partition plate (210), a sealing plate (320) fixed at one end of the connection column (310), a slider (330) fixed at the other end of the connection column (310), and a first elastic member (340) sleeved on the connection column (310). The button assembly drives the slider (330) to slide in an axial direction of the mounting cover (200) towards the partition plate. An end of the water receiving tank (500) is fixedly sleeved on the mounting cover (200). A second vent hole (512) and a second water outlet hole (511) are provided in an upper position and a lower position of a side wall of the water receiving tank (500). The second water outlet hole (512) communicates with a first water outlet hole (212). The second vent hole (512) communicates with a first vent hole (213). When the filter assembly operates, water flows into the filter (600) from a filter hole, thereby achieving filtration. The filter assembly (600) has a simple and compact structure.
C: Disclosed is an electric motor oil pump assembly, comprising: an electric motor assembly (200); an oil pump assembly (100); an inner soundproof cover (400), the inner soundproof cover (400) being sheathed outside the oil pump assembly (100) and defining, together with the oil pump assembly (100), an inner layer soundproof cavity (401) filled with low pressure oil, the inner layer soundproof cavity (401) being in communication with a low pressure cavity (101) of the oil pump assembly (100), and the inner soundproof cover (400) being provided with a soundproof cover cavity (402); a pre-tightening buffer assembly (300), the pre-tightening buffer assembly (300) comprising a piston (310) and an elastic member (320), the piston (310) being in cooperation with the soundproof cover cavity (402) and abutting against an upper end cover (110) of the oil pump assembly (100), and the elastic member (320) being used for providing a pre-tightening force for pressing the upper end cover (110). The soundproof cover cavity (402) is in communication with a high pressure cavity (102) of the oil pump assembly (100), so that the piston (310) presses the upper end cover (110) under the action of oil pressure. By filling the low pressure oil between the inner soundproof cover (400) and the oil pump assembly (100), the electric motor oil pump assembly is light in weight, small in space occupation, and low in manufacturing costs and working noise. Further disclosed is a steering system comprising the electric motor oil pump assembly and a vehicle comprising the steering system.
D: Disclosed are an electric motor oil pump assembly (1000), a steering system and a vehicle. The electric motor oil pump assembly (1000) comprises: an electric motor assembly (200); an oil pump assembly (100); an inner soundproof cover (400), the inner soundproof cover (400) being sheathed outside the oil pump assembly (100), and defining, together with the oil pump assembly (100), an inner layer soundproof cavity (401) filled with low pressure oil, the inner layer soundproof cavity (401) being in communication with a low-pressure cavity (101) of the oil pump assembly (100), and the inner soundproof cover (400) being provided with a soundproof cover cavity (402); and a pre-tightening buffer assembly (300), the pre-tightening buffer assembly (300) comprising a piston (310) and an elastic member (320), the piston (310) being in cooperation with the soundproof cover cavity (402) and forming as an integral body with an upper end cover (110) of the oil pump assembly (100), and the elastic member (320) being elastically clamped between a top wall of the soundproof cover cavity (402) and the piston (310). The soundproof cover cavity (402) is in communication with a high pressure cavity (102) of the oil pump assembly (100), so that the piston (310) presses the upper end cover (110) under the action of oil pressure.
Answer: A