Sanhua Intelligent Controls Obtains Patent for Electromagnetic Drive Device, Electromagnetic Drive Device Improves Magnetic Flux Leakage and Enhances Actuation Reliability

On March 24, the State Intellectual Property Office’s information shows that Zhejiang Sanhua Intelligent Control Co., Ltd. has applied for a patent titled “Electromagnetic Drive Device and Gas Proportional Valve with Such Device,” with authorization announcement number CN110778771B, granted on March 17, 2026. The application publication number is CN110778771A, application number CN201810855831.5, published on March 17, 2026. The application was filed on July 31, 2018. The inventors requested not to disclose their names. The patent agency is Beijing Jiajia Intellectual Property Agency Co., Ltd., with patent agent Wang Xueqiang. The classification codes are F16K31/06, H01F7/126, H01F7/16.

The patent abstract states that the electromagnetic drive device includes a cavity, comprising a housing and a magnetic core. The housing at least includes a magnetic guide part, which includes a top wall and a side wall. The top wall is fixedly connected to the magnetic core. An outer periphery of the magnetic core is provided with a movable coil assembly, which can reciprocate along the axis of the magnetic core. The device also includes at least one permanent magnet and a first magnetic guide. The permanent magnet and the first magnetic guide are located within the cavity. The top wall does not directly contact the first magnetic guide. The permanent magnet is roughly arc-shaped, with an inner wall surface and an outer wall surface, and includes an outer magnetic pole and an inner magnetic pole. The outer magnetic pole is directly or indirectly attached to at least part of the side wall, while the inner magnetic pole is attached to the first magnetic guide. The invention aims to relatively improve magnetic flux leakage and enhance the reliability of the electromagnetic drive device.

Sanhua Intelligent Controls was established on September 10, 1994, and listed on the Shenzhen Stock Exchange on June 7, 2005. Its registered and business addresses are both in Shaoxing City, Zhejiang Province. The company is a leading global supplier of refrigeration control components and integrated automotive air conditioning and thermal management systems. Its core businesses include refrigeration and air conditioning electrical parts and automotive components, with strong technical capabilities and significant product advantages.

Sanhua’s industry classification is “Home Appliances - Appliance Parts II - Appliance Parts III,” involving concepts such as robot actuators, Evergrande Group, and Xiaopeng Motors. The company mainly operates in refrigeration and air conditioning electrical parts and automotive parts through two divisions. The refrigeration and air conditioning parts focus on building HVAC, with products like four-way reversing valves; the automotive parts focus on thermal management, including thermal expansion valves, with business covering domestic and international markets.

By 2025, Sanhua’s revenue reached 31.012 billion yuan, ranking first in the industry, aligned with the industry average and median. Main business revenue includes 18.585 billion yuan from refrigeration and air conditioning electrical parts (59.93%) and 12.427 billion yuan from automotive parts (40.07%). Net profit was 4.107 billion yuan, also ranking first in the industry, matching the industry average and median.

Recent patent information for Zhejiang Sanhua Intelligent Control Co., Ltd. is as follows:

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