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The working principle of four-way valve cooling and heating

Speaking of the four-way valve, many people may not know it, but it is an indispensable working part in refrigeration equipment. The four-way valve, as its name implies, is a control valve with four ports. When the solenoid valve coil inside is de-energized, the spool valve of the four-way valve will move leftward under the action of the right pressure spring. Then the high-pressure gas will enter the capillary tube and transfer to the piston chamber at the right end. Then the gas inside the left cavity will be discharged, and a certain pressure difference will be formed at the left and right ends, so that the exhaust pipe can be connected with the outdoor machinery, and a refrigeration cycle will be formed.

2021

02-22

Focusing on the frontiers of the industry, the heat pump drying and freezing technology exchange meeting was held in Songshan Lake, Dongguan

Songshan Lake in early autumn is full of greenery and waves. Under the warm autumn sun, the "Heat Pump Drying and Freezing Technology Exchange Conference" was held as scheduled on October 21, 2020 at the CIMC Zhigu International Conference Center in Songshan Lake, Dongguan. This grand event was hosted by Zhejiang Sanhua Trading Co., Ltd. and undertaken by Dongguan Sanjiang Refrigeration and Heating Equipment Co., Ltd. The conference fully focused on the frontiers of heat pump industry technology, and held a Sanhua product and technology exchange meeting.

2021

02-24

Emerson Heat Pump Drying and Freezing Technology Exchange Conference was successfully held in Dongguan

On the afternoon of October 21, 2020, hosted by Emerson Environmental Optimization Technology (Suzhou) Co., Ltd., and undertaken by Dongguan Sanjiang Refrigeration Equipment Co., Ltd., Emerson Product Promotion and Heat Pump Drying and Freezing Technology Exchange Conference was held at Dongguan Songshan Lake Jizhi Valley International Conference The center was successfully held. Nearly 100 representatives from equipment manufacturers, accessory companies, distributors and industry media engaged in air source heat pump drying and refrigeration cold chain industries across the country attended the meeting. Zhao Hengyi, Executive Deputy Secretary-General of the Heat Pump Professional Committee of China Energy Conservation Association, and Emerson Marketing Department Manager Huang Xueyuan, Emerson South China Sales Manager Guan Zhiguo, Emerson Senior System Engineer Han Niansheng, Emerson Application Technology Manager Li Changsheng, "Heat Pump" magazine editor-in-chief Zhou Qingsong and other leading guests were invited to attend the meeting. The meeting was attended by Chen Zaicheng, General Manager of Dongguan Sanjiang Refrigeration Equipment Co., Ltd. Host.

2021

02-24

The working principle and troubleshooting of Sanhua electronic expansion valve

With the emergence of new refrigerants, more thermal expansion valves that can adapt to different charging methods and superheat settings are needed to meet the needs of different refrigerants, so electronic expansion valves have appeared. Sanhua electronic expansion valve can meet the application of different working fluids

2021

02-25

English Catalogue

2021

09-06

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