The pressure switch is installed on the high-pressure side of the air-conditioning system.When the refrigerant pressure is ≤0.196MPa, since the elastic force of the diaphragm, the butterfly spring and the upper spring is greater than the pressure of the refrigerant, the high and low pressure contacts are disconnected (OFF), the compressor stops, and low pressure protection is realized.
When the refrigerant pressure reaches 0.2MPa or more, this pressure is higher than the spring pressure of the switch, the spring will bend, the high and low pressure contacts are turned on (ON), and the compressor operates normally.
The pressure switch is mainly used in the refrigeration system, in the pipeline circulation system of high pressure and low pressure, to protect the abnormal high pressure of the system to prevent damage to the compressor.
After being filled, the refrigerant flows into the aluminum shell (that is, inside the switch) through the small hole under the aluminum shell. The inner cavity uses a rectangular ring and a diaphragm to separate the refrigerant from the electrical part and seal it at the same time.
The automobile air conditioner pressure switch is a part to protect the air conditioner refrigeration, it can adjust the pressure in time.When the refrigerant pressure in the air conditioning system is too high or too low, the pressure switch is turned off, so that the compressor does not work (the pressure switch and other switches control the relay to control the compressor) and protect the system components from damage.Generally divided into two-state pressure switch and three-state pressure switch. The pressure switch is generally connected to the compressor, the condenser electric fan or the water tank fan. It is controlled by the ECU on the car and controls the opening of the fan according to the pressure change in the air conditioner. Turn off, or the air volume, when the pressure is too high, the compressor will stop working to protect the system.
The main applicable models of this air-conditioning pressure switch are as follows: Dongfeng, peugeot, 307, 206, 207, 308, 408, 508, 3008, 2008, 301, 308S, 4008, 5008, Citroen, Sega, C2, Senna, Picasso, C4L C4 Sega C6 C3-XR Elysee New Elysee Beverly C5 C5 Tianyi Fengshen A9 AX7 AX4 AX3 A60 L60 A30 S30 H30.The above complaints all refer to applicable models, not any product brands.
It is widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools, etc., such as refrigeration systems, lubrication pump systems, air compressor etc.
The mechanical pressure switch is a micro switch action caused by pure mechanical deformation.When the pressure increases, the different sensing pressure components (diaphragm, bellows, piston) will deform and move upward. The upper micro switch is activated by a mechanical structure such as a railing spring to output an electrical signal. This is the principle of the pressure switch.
This is an air conditioner three-state pressure switch, which includes a high and low pressure switch and a medium voltage switch. The three-state pressure switch is installed on the high-pressure pipeline of the air-conditioning system.
Low-pressure switch: When the air-conditioning system leaks or the refrigerant is low, in order to protect the compressor from damage, the control circuit of the compressor is forcibly cut off to stop the compressor.
Mid-state switch: When the condensing pressure is high, force the condensing fan to rotate at a high speed to reduce the high pressure pressure and increase the cooling effect.
High pressure switch: In order to prevent the system pressure from being too high, causing the system to explode, the compressor is forced to stop working. When the high-pressure pressure of the air conditioner is abnormally high, the high-pressure switch is opened to cut off the control circuit of the compressor, and the air-conditioning system stops working.
This series of pressure controllers mainly use the built-in stainless steel reversible action diaphragm to work in the opposite direction after sensing a certain pressure.When the diaphragm moves, a guide rod will drive the electrical contacts to close or open. When the induced pressure drops below the recovery value, the switch can automatically reset.
YK series pressure switch (also known as pressure controller) is developed by using special materials, special craftsmanship and learning from the technical advantages of similar products at home and abroad. It is a relatively advanced micro switch in the world.This product has reliable performance and easy installation and use. It is used in heat pumps, oil pumps, air pumps, air-conditioning refrigeration units and other equipment that needs to adjust the pressure of the medium by itself to protect the pressure system.
The pressure switch adopts stainless steel action diaphragm and is manufactured by mature technology. It has the advantages of fully enclosed, high precision, no drift, small size, vibration resistance, long durability, reliable performance, and convenient installation.It can automatically measure and control the pressure in the system, prevent the pressure in the system from being too high or too low, and output switch signals to ensure that the equipment works within a safe pressure range.
This pressure switch can be used in many fields, such as air conditioning refrigeration systems, car horns, ARB air pumps, air compressors, etc.In the refrigeration and air-conditioning system, the general air-conditioning pressure switch is installed in the air-conditioning condensing pipe, mainly to detect the pressure of the refrigerant in the air-conditioning pipe.When the pressure is abnormal, the corresponding protection circuit is activated to prevent damage to the system.Common air-conditioning pressure switches generally include high-pressure switches, low-pressure switches, two state pressure switches and three state pressure switches.
This is a universal pressure switch, the appearance can be designed according to the specific requirements of customers, and it has a wide range of applications.Such as air suspension systems, water treatment, air compressors, mechanical hydraulic and oil pressure control systems, agricultural machinery, construction machinery, CNC machine tools and machining center lubrication systems, safety devices, air-conditioning, refrigeration equipment, vacuum generators, vacuum tanks , Electric vehicle brake booster system, etc.