The expansion valve, also known as the throttle valve, is the key to connecting the high pressure side and the low pressure side of the air conditioning circuit. The principle and structure of the thermal expansion valve are simple, the cost is low, and it is widely used in air conditioning systems. However, with the increase in the demand for energy saving of air conditioners, inverter air conditioners have gradually become the mainstream. The thermal expansion valve has a slow response rate, small adjustment range and low precision. Such shortcomings are gradually being replaced by electronic expansion valves (EXV).

The EXV adds a micro-motor to the traditional TXV to adjust the opening to control the flow of the loop. It is an expansion valve that can realize the "stepless speed change" adjustment function. In terms of working principle, EVX also needs to sense the pressure and temperature of the evaporator outlet, so it needs to add sensors and controllers to form a control loop, so the unit price of EXV can be increased by more than 2 times compared with TXV of the same specification. At present, the market penetration rate of electronic expansion valve is less than 30%, there is still a lot of room for improvement, and the improvement trend is relatively clear.

Compared with traditional vehicles, the electrification and intelligence of new energy vehicles make the electronic expansion valve more widely used. In addition to EXV, depending on the coupling scheme of the whole vehicle, the cooling circuit of the battery and motor electronic control also needs to add 1 to 2 EXVs. Different technical solutions may also require an additional EXV, so the vehicle matching and value of EXV on new energy vehicles will double.

New energy vehicles do not have an engine as a heat source, and a battery thermal management system is added. Due to the sensitivity of the performance of batteries and power components to temperature, the thermal management scheme and components of new energy vehicles have undergone great changes, which has led to the replacement of Chiller. Heater, cooling class, electronic expansion valve, electronic water pump, electronic water valve, electric compressor and other components, and add PTC heater or heat pump system.

Hefei Young Vacuum Technology Co., Ltd, which specialized in the market of helium leak detection equipment for EXV, has mature technology and perfect solution. It is rather a reliable factory.

Here is our equipment for details.

Equipment Name：Electronic expansion valve Helium Leak Test

Device characteristics:

      1. This equipment is automatic control system that can perform vacuum box helium mass spectrometry air tightness detection on electronic expansion valve and four-way valve ;

      2. The system vacuums the workpiece and vacuum box synchronously,then fills the inspected workpiece with helium and perform vacuum box helium mass spectrometry air tightness detection; It can judge the qualified and unqualified parts of the inspected workpiece,the helium gas in the workpiece will be recycled later;

       3. The technology is mature and the detection precision is very high which can detect the overall comprehensive leakage rate of  the workpiece;

       4.  The vacuum box adopts stainless steel structure with surface treatment, helium adsorption rate is very small;

       5. Configuration of helium recovery system, high recovery rate,low helium consumption;

       6. The system can be configured with remote monitoring,statistical analysis function.

 Detection accuracy： 1.0×10-6Pa.m3/S