Abstract: Disclosed is a pump device, comprising a rotor assembly, a stator assembly and a spacer. The pump device has a first inner cavity and a second inner cavity; the pump device has a first housing and a second housing, the first housing partially covers the rotor assembly, the second housing at least partially covers surrounds an outer periphery of the stator assembly; the first housing and the spacer are fixedly connected by means of welding, and the connection position between the first housing and the spacer is sealed; the second housing and the spacer are fixedly connected by means of welding, and the connection position between the second housing and the spacer is sealed; the spacer comprises a first flange portion and a cylinder portion.

Abstract: A fluid drive device, comprising a stator assembly, a pin, and a conductive member. The pin is electrically connected to a winding of the stator assembly and the conductive member. The conductive member comprises a main body portion, an end portion, and a pin portion. The main body portion is connected to the end portion and the pin portion. The pin portion can serve as a pin end electrically connected to an external power supply. The conductive member further comprises a first portion. The first portion is connected to the end portion by means of a first connecting portion. The first portion is located in an extending direction of the thickness of the end portion. The conductive member is provided with a first hole and a second hole.

Abstract: A controller for vehicle air conditioner includes a base defining a mounting cavity; a knob assembly rotatably mounted to the base, wherein at least a portion of the knob assembly is located in the mounting cavity; and at least one bearing element arranged between the base and the knob assembly. Such a design reduces the friction between the base and the knob assembly and thus reduces the noise.

Abstract: A rotor assembly being an injection molded piece, and comprising a first shaft sleeve and a rotor; a first injection molded body is formed by using the rotor and the first shaft sleeve as injection molding inserts to pass through injection molding; a second injection molded body is formed by at least using the first injection molded body as an injection molding insert to pass through injection molding; the second injection molded body comprises a lower cover plate and a wrapping layer, the wrapping layer wrapping around at least a portion of the outer peripheral surface of the first injection molded body; the rotor assembly further comprises blades, the blades being fixedly connected to the lower cover plate or the blades forming an integrated structure with the lower cover plate.

Abstract: A controller for vehicle air conditioner includes a base defining a mounting cavity; a knob assembly rotatably mounted to the base, wherein at least a portion of the knob assembly is located in the mounting cavity; and at least one bearing element arranged between the base and the knob assembly. Such a design reduces the friction between the base and the knob assembly and thus reduces the noise.