Speed-reduction type electronic expansion valve

Abstract

Present invention relates to a electronic expansion valve suitable for frequency conversion air conditioner, commercial air conditioner, minitype central air conditioning, chilled food display case and constant temperature and humidity equipment etc, belonging to air conditioning and refrigerating technology field. It contains repeating motor, speed reducing gear, valve body, and shell. Said stepping motor drives underdriving gear set for transferring power, combined with corrugated pipe to make adjustments to valve needle lift range. The decelerating effect of Underdriving gear set increases output torque to obtain large enough output torque by using smaller electromagnetic force, to satisfy large caliber and novel refrigerant requirement.

Description

technical field [0001] The invention relates to an electronic expansion valve, in particular to a deceleration electronic expansion valve, which is suitable for variable frequency air conditioners, commercial air conditioners, small central air conditioners, refrigerated food display cabinets, and constant temperature and humidity equipment, and belongs to the technical field of air conditioning and refrigeration. technical background [0002] At present, in refrigeration systems, electronic expansion valves are favored by the refrigeration industry as a new generation of refrigeration throttling devices, especially in the fields of small commercial air conditioners and central air conditioners. In addition, the new refrigerants R407c and R410a will tend to replace the refrigerant R22, which has a destructive effect on the atmospheric ozone layer, and bring some new requirements to the electronic expansion valve. The electronic expansion valve adjusts the flow of the cold (h...

AI Technical Summary

Problems solved by technology

[0007] Utility model patent 97243335.X discloses a direct-acting electronic expansion valve for household air conditioners. The expansion valve uses the rotation of the valve stem directly connected to the rotor of the stepping motor to make the valve needle on the front end of the valve stem move up and down. Movement, so as to control the opening of the valve hole. Because the stepping motor is directly connected to the valve stem in this structure, the valve body is compact in structure and small in size. However, due to the direct action of the stepping motor, the opening of the valve hole is step-by-step. , not consecutive

The structural volume of this kind of electronic expansion valve is still very large, and it has high requirements on the technical performance of the bellows, and it is difficult to process it with the existing technical level.

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