Which is better, Emerson, or Danfoss, and why is it good, and where is it good?

A very stupid way, the valve core of the medium temperature cold storage is the same as the number of compressor horses, and the valve core of the low temperature cold storage is equal to the number of compressor forces minus 1.

Danfoss good. You can go to Tianjin Wuqing Development Zone and ask.

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Danfoss' electronic expansion valve is OEM of Lugong and is made in Thailand; It is recommended to use the expansion valve produced by the original Japanese factory, and the stability in Thailand is not good.

What system is it used for? Refrigeration or other, the requirements of the whole system?

Of course, the three brands are different, and their respective focuses are different.

In terms of refrigeration equipment, Emerson and Danfoss are used the most, while Parker uses them to a lesser extent. In the domestic market, there are more and more domestic Sanhua valves that are slowly being used, with low cost and small quality gap.

You can directly purchase the ordinary electronic expansion valve of Zhejiang Sanhua;

At present, all electronic expansion valves are basically the same, divided into three throttle calibers.

The electronic expansion valve of the internal machine should be one of the smallest diameters.

Danfoss's electronic expansion valve is actually made by Saginomiya in Japan, but the factory is in Thailand, and the quality is stable, so it is recommended to buy the valve parts produced by the Japanese factory.

In terms of refrigeration accessories, to say the best, Danfoss in Denmark is a relatively large brand, and the quality has also been tested by the market.

Refrigeration is divided into household air conditioning, air conditioning, cold storage, vehicle refrigeration system, vehicle refrigeration system, cold storage has controlled steam, fresh storage, freezer, quick-freeze storage, vehicle refrigeration system has fresh-keeping car, refrigerated truck, freezer car, different accessories for each application, the brand is also different, I am doing vehicle refrigeration, at present, there are Danfoss expansion valves in the vehicle refrigeration system, FJ expansion valves are more famous, solenoid valves Danfoss, regulating valves Danfoss are relatively stable, others have not been tried, Many domestic expansion valves are used in air-conditioning systems.

Danfoss boss Emerson second.

It's a little bit of a secret, but let me tell you, hehe, Emerson's and Danvers' are absolutely good.

The expansion valve, also known as the throttle valve, is the main component of the automobile air conditioning and refrigeration system, which is installed at the inlet of the evaporator, as shown in Figure 15, and is the dividing point between the high and low pressure of the automobile air conditioning and refrigeration system. Its function is: throttling and decompressing the high-pressure liquid refrigerant from the liquid storage dryer, adjusting and controlling the liquid refrigeration dose entering the evaporator, so that it can adapt to the change of refrigeration load, and at the same time can prevent the liquid hammer phenomenon of the compressor (that is, the liquid refrigerant that has not evaporated is compressed after entering the compressor, which is easy to cause damage to the compressor valve) and the vapor at the outlet of the evaporator is abnormally overheated.

The temperature-sensing expansion valve used in the automobile air-conditioning refrigeration system, also known as the thermodynamic expansion valve, uses the temperature sensing package installed at the outlet of the evaporator to sense the superheat of the refrigerant vapor (superheat refers to the value that the actual temperature of the vapor is higher than the evaporation temperature), so as to adjust the size of the expansion valve opening, so as to control the flow of liquid refrigerant entering the evaporator. When the temperature of the evaporator outlet decreases, the volume of liquid in the chamber of the chamber, capillary tube and membrane shrinks, and the valve port of the expansion valve is closed, thereby restricting the refrigerant from entering the evaporator. Opposite.

If the evaporator outlet temperature rises, the expansion valve grating will open. This increases the refrigerant flow.

The internal temperature sensing H type automobile air conditioning thermal expansion valve has a heat insulation column and a guide column at the lower end of the internal temperature sensing pipe, and there is an inner conical sealing ring made of non-metallic materials between the guide column and the valve pin, relying on the deformation when it is stressed up and down, it not only ensures the sensitivity of the valve in the adjustment process, but also makes the gas and liquid cavities of the valve have good sealing performance, so that the internal temperature sensing pipe of the valve can feel the actual temperature of the gaseous refrigerant flowing through the internal temperature sensing pipe, and ensures the normal operation of the refrigeration system and the improvement of refrigeration efficiency.