Please select the most similar patent number from A, B, C and D. Which number is?
A novel cheese dyeing machine comprises a cylinder body (5), a yarn rack (15), yarn bamboo (16) and a driving motor (26), wherein the yarn rack (15) and the yarn bamboo (16) are arranged in the cylinder body (5); a centrifugal pump (27) and a heat exchange coiled pipe (18) are also arranged in the cylinder body (5); the heat exchange coiled pipe (18) is arranged at a bottom of the cylinder body (5); a shell of the centrifugal pump is divided into two parts, one half of the shell is integrated with a cylinder bottom (3), and the other half of the shell (11) can be separated and jointed with the cylinder bottom (3); the centrifugal pump comprises double suction ports (25a, b) and is provided with an electronic speed-regulating control system for controlling a rotary speed of the centrifugal pump (27); and the heat exchange coiled pipe (18) is fixed below the yarn rack (15) and is externally connected to a water and steam source. A fluid flow control system controls dyeing fluid to flow one-way, and a pressurization and depressurization system, an injection system and a temperature increasing and decreasing system are also arranged. The dyeing machine can be widely used in the dyeing and finishing industry.
A: An internal circulation indoor temperature regulation and control system, comprising a fluid storage, heating and refrigerating device and a controller. The fluid storage, heating and refrigerating device comprises a fluid storage container (1), a heater and a refrigerator, the fluid storage container (1) is connected to a water distributor (5) by means of a water outlet pipeline (4), the water distributor (5) is connected to a cold-heat exchange coil pipe (7), the other end of the cold and heat exchange coil pipe (7) is connected to a water collector (8), the water collector (8) is connected to the fluid storage container (1) by means of a water return pipeline (12), a circulating pump (10) is arranged on the water return pipeline (12), and a flow control valve (6) is arranged on the cold-heat exchange coil pipe (7); and the controller comprises a control main machine (3) and a temperature sensor, wherein the control main machine (3) is respectively connected to the temperature sensor, the heater, the refrigerator, the flow control valve (6) and the circulating pump (10).
B: Provided is a novel sanitary self-priming pump, comprising a motor (20), a centrifugal pump (18) and a circulating reflux pipeline. The circulating reflux pipeline is formed by a water-sealing bend pipe (7), a water-sealing ball (8), a gas-liquid separation chamber (10) and the like; two ends of the circulating reflux pipeline communicate with a water inlet pipe and a water outlet pipe (16) of the pump; and the circulating reflux pipeline has functions of automatically opening and closing, separating gas and liquid, and sealing water, so that a common sanitary centrifugal pump becomes the novel sanitary self-priming pump with a self-priming function. On the premise that the pump meets the requirement of a sanitary property, the defects of low efficiency and large noise of a traditional self-priming pump are overcome, and the novel sanitary self-priming pump has a performance feature of the centrifugal pump, which can meet different working condition requirements by changing the rotation speed or changing an outer diameter of an impeller. It is simple in manufacturing process, has no quick-wear part, and is reliable to use, stable in performance, high in practicability, high-efficient, energy-saving and noise-reducing.
C: An airflow dyeing machine capable of independently supplying air by multiple pipes comprises a main cylinder (1), a lifting roller (2), a connection pipe, two or more fans (3), and a nozzle combination (5) connected to the fans. One end of each fan (3) is connected to an independent air draft pipe, and the other end is connected to the independent nozzle combination (5). The fans (3) are arranged at the top of the main cylinder (1). Outlets of the fans are docked with airflow inlets of the nozzle combination (5). Fans and dyeing pipes are controlled by each independent circuit control system. A first nozzle mouth (19) is formed by a gap of an upper nozzle barrel (12) and a lower nozzle barrel (13) in the nozzle combination (5). A second nozzle mouth (20) is formed by a gap between an interception ring (14) and the tail of the lower nozzle barrel (13). A U-shaped baffle (15) is arranged between the tail of the lower nozzle barrel (13) and the interception ring (14), so that the airflow is centrally jet from lower part of the nozzle mouth. By means of the dyeing machine, the efficiency and the dyeing quality are greatly improved, the power consumption is reduced, and the operation flexibility is increased.
D: An electric centrifugal pump comprises a water pump housing (1), a water sealing bearing (2), a water pump impeller (3), an elastic gasket (4), an internal motor housing (5), a bearing seat (6), a rotor front bearing (7), a motor stator (8), a motor rotor (9), a motor rotor shaft (10), a motor rotor back bearing (11), a pilot impeller (12), a pilot impeller cover (13), a water pump drive control panel (14), a controller cover (15), and an external motor housing (16). A water pump water inlet cavity, a shaft through hole of the motor rotor, the pilot impeller (12), a pilot impeller cavity of the pilot impeller, a helical overflow hole (52) of the internal motor housing, a rotor cavity, a helical overflow hole (62) of the bearing seat and the water pump impeller (3) sequentially communicate with one another and form an internal forced cooling system. The electric centrifugal pump of the present invention has a simple structure and reasonable design, and can reduce flow losses of water while enhancing cooling performance of the internal cooling system, thereby better addressing the thermal load problem experienced by an electric centrifugal pump, and improving reliability of the electric centrifugal pump.
Answer: C