Electronic expansion valve and cooling system provided with same

Abstract

The invention provides an electronic expansion valve and a cooling system provided with the same. The electronic expansion valve comprises a valve seat, a valve needle provided with an opening position and a closing position, a driving mechanism comprising a rotor and coils and a planet gear reducing mechanism and a transmission mechanism, wherein the planet gear reducing mechanism comprises a planet frame, planet wheels and a gear box, the rotor, the planet frame and the gear box are coaxially arranged, the rotor is fixedly connected with the planet frame to drive the planet frame to rotate along the axis of the rotor, the planet wheels sleeve first mounting shafts, the gear box comprises a box body, a fixed inner gear ring and an output inner gear ring, and the planet wheels are engagedwith the fixed inner gear ring and the output inner gear ring at the same time; and the transmission mechanism comprises a nut and screw rod, a first end of the screw rod is fixedly connected with theoutput inner gear ring, a second end of the screw rod abuts against the valve needle, and thus the valve needle can move between the opening position and the closing position. According to the technical scheme of the electronic expansion valve and the cooling system provided with the same, the problem that the requirements of high precision and miniaturization can not be met while the flow regulation range is increased through the electronic expansion valve in the prior art is effectively solved.

Description

technical field [0001] The invention relates to the field of refrigeration, in particular to an electronic expansion valve and a refrigeration system having the same. Background technique [0002] figure 1 A typical deceleration type electronic expansion valve structure is shown. The deceleration type electronic expansion valve for inverter air conditioner is mainly composed of two parts, one part is the valve body part for flow regulation, and the other part is the coil part used for driving. The coil part includes: a permanent magnet stepping motor 1', a gear reducer 2' with three-stage deceleration, a threaded pair structure 5' that converts the motor's rotational motion into the vertical motion of the screw 3', and the valve body includes a valve seat 10', and the core components such as the spring 7 that controls the valve needle 8 to rise and fall. The working principle of the above-mentioned electronic expansion valve is introduced as follows: First, the electronic ...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide an electronic expansion valve and a refrigeration system with it, so as to solve the problem that the electronic expansion valve in the prior art cannot meet the requirements of high precision and miniaturization while increasing the flow adjustment range

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