Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is an intelligent urinal, comprising a urinal (1), a flushing device (2) and a sensor (3), and further comprising a case (4), a cleaning device (5), a drying device (6), a control panel (7) and a main control board (8). The case (4) is installed above the urinal (1). The flushing device (2), the cleaning device (5), the drying device (6) and the main control board (8) are all installed inside the case (4). The control plane (7) is installed outside the case (4). The flushing device (2), the sensor (3), the cleaning device (5), the drying device (6) and the control panel (7) are all connected to the main control board (8). The main control board (8) is connected to a power supply line (9).
A: Disclosed are a urinal and a urinal flushing control method. The urinal comprises a urinal body, a solenoid valve for starting and stopping flushing, a capacitive sensor for sensing the amount of urine on an outer wall of the urinal body, and a controller for receiving a capacitance value signal to control the turning-on and turning-off of the solenoid valve, wherein the controller sets a flush timing base point when it is determined that a capacitance value shows a downward trend after a first period of time has elapsed since the controller controlled the solenoid valve to be turned off, and same controls the solenoid valve to be turned on after the flush timing base point lasts for a second period of time. The solution can reduce the erroneous flush rate and improve the adaptability to the glaze of a urinal body.
B: A boiling and cleaning device for quartz processing, comprising a deoiling tank (3), a boiling tank (4), an ultrasonic cleaning tank (5), a moisturizing tank (6) and a drying tank (7) which each comprise an infrared sensor and are arranged in sequence from left to right, a rack (1), an electric push rod (2), a PLC control device and a sliding plate (12); a material basket (21) is suspended at the lower end of the electric push rod (2), an induction switch (14) is provided on the rack (1), the electric push rod (2) is mounted at the bottom of the sliding plate (12), a spray nozzle (8) is mounted in each of the deoiling tank (3), the boiling tank (4) and the moisturising tank (6), and a cleaning liquid supply device (31), a thermostatic heating device (41), an ultrasonic generator (51), a water supply device (61) and a hot air blowing device (71) are respectively mounted at one side of the deoiling tank (3), of the boiling tank (4), of the ultrasonic cleaning tank (5), of the moisturising tank (6) and of the drying tank (7); the thermostatic heating device (41) can perform thermostatic heating on water in the boiling tank (4) to keep the water in a pseudo-boiling state, and the PLC control device controls working states of various devices and electronic components. The boiling and cleaning device for quartz processing has the advantages of automatically completing boiling, cleaning, blowing and drying processes of a quartz product, stable operation, high cleanliness, good control effect, etc.
C: A hook-type washing machine, comprising a casing (1) and a single chip microcomputer for controlling operations of various devices and components, a washing chamber and a drying chamber being provided in an inner chamber of the casing (1) in sequence from bottom to top; a travelling mechanism (2) is provided on the side wall of the washing chamber, the travelling mechanism (2) being provided with a scrubbing device (9); and drying devices (6) are uniformly provided on the chamber wall of the drying chamber at intervals, a lifting device (5) is provided on the top portion of the drying chamber, the end of a rope of the lifting device (5) being connected to a hanging member (3). The hook-type washing machine is easy to operate and has low manufacturing cost; by means of the cooperation between the lifting hanging member (3) and the washing device, the laundry can be washed in a tidy and thorough manner, so that the laundry is not twisted together during washing, effectively reducing the wear rate of the laundry, facilitating for people to easily remove the laundry; in addition, since a double-layer structure is used, the laundry in the washing chamber can be lifted into the drying chamber for drying, and the dried laundry can be directly stored, having the advantages of being easy to use and a good washing effect, etc.
D: A fully-automatic bionic digestive system for monogastric animals, comprising a housing (2), a constant-temperature air bath shaker (6), a bionic digestion device (4), an automatic enzyme supplementation device, a buffer circulating device, a cleaning device and a control circuit (5); an upper left part of the housing (2) is provided with a digestion reaction chamber (3), and the constant-temperature air bath shaker (6) is arranged within the digestion reaction chamber (3); the automatic enzyme supplementation device is fixedly mounted within the housing (2) and is connected with the bionic digestion device (4) by means of an infusion tube (58); the buffer circulating device and the cleaning device are arranged below the housing (2) and are respectively connected with the bionic digestion device (4) by means of the infusion tube (58); the control circuit (5) is arranged within the housing (2) and connected to the constant-temperature air bath shaker (6), the automatic enzyme supplementation device, the buffer circulating device and the cleaning device by means of conducting wires; the control circuit (5) is connected with an industrial control computer which is mounted in the housing (2), and the industrial control computer is connected with a display (1) installed above the housing (2) and to the right; and the bionic digestion device (4) is mounted vertically above the constant-temperature air bath shaker (6). The fully-automatic bionic digestive system for monogastric animals has a simple structure, is easy to use, and can prevent leakage of bionic digestion reaction solution. The digestion simulation carried out thereby features high accuracy, good reproducibility, and minimal errors.
Answer: A