How Does Electronic Expansion Valve Work

Water boiling at different temperatures due to changing pressure. They do this in response to signals sent to them by an electronic controller.

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What the expansion valve does is to accomplish this process by inhibiting the refrigerant from flowing into the evaporator coil.

How does electronic expansion valve work. A small motor is used to open and close the valve. As it flows the refrigerant temperature is detected by the rod running through the port. The electronic expansion valve EEV operates with a much more sophisticated design.

As the high pressure liquid refrigerant bursts through the small gap between the valve seat and the needle it drops in pressure this will result in some of the refrigerant vaporising and the rest will continue through as a liquid. The Automatic Expansion valves works in response to the pressure changes in the evaporator due to increase in load pressure increase or due to decrease in load pressure decreasesThis valve maintains a constant pressure throughout the varying load on the evaporator controlling the quantity of refrigerant flowing into EvaporatorIt consists of a needle valve a seat a diaphragm and a spring as. Image from Fundamental Refrigeration.

In this video were going to cover the basic working principles for how an electronic expansion valve wo. An expansion valve also called a TVX valve regulates the flow of refrigerant inside of a cooling system. A small motor is used to open and close the valve port.

Animation of how an electronic expansion valve works. What is an electronic expansion valve and how does it work in Ac About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features. Expansion ValveThe expansion valve removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a vapor in the evaporator.

Learn HVAC enineering with animations and 3d models. Also to know is how do you test an expansion valve. In this video were going to cover the basic working principles for how an electronic expansion valve works in a refrigeration system.

A thermostatic expansion valve TXV see Figure 1 is a refrigeration and air conditioning throttling device that controls the amount of refrigerant liquid injected into a systems evaporatorbased on the evaporator outlet temperature and pressurecalled the superheat. How does an electronic expansion valve work EEV EXV. How does an electronic expansion valve work.

How does an electronic expansion valve work. The valve decreases the pressure to allow the refrigerant to. They do this in response to signals sent to them by an electronic controller.

EEVs control the flow of refrigerant entering a direct expansion evaporator. More on the electronic expansion valve The electronic expansion valve is a device that is used to control the refrigerant flow into the evaporator in precise amounts. It uses a sensing bulb or disc that opens or closes the diaphragm to allow the.

Click to read in-depth answer. Therefore they can be found in air conditioners heat pumps and other equipment that follow the refrigeration cycle. So without the expansion valve there is the big possibility that the refrigerant would flow and rush into the evaporator coil without any reduction in its pressure.

EEVs control the flow of refrigerant entering a direct expansion evaporator. The electronic expansion valve EEV operates with a much more sophisticated design. Under a greatly reduced pressure the liquid refrigerant is at its coldest as it leaves the expansion valve and enters the evaporator.

An expansion valve is simply a refrigerant metering device to control the rate of flow of refrigerant into the evaporator located in your dash. Figure 2 shows the different phases and pressures the refrigerant goes through as it is pumped through the system moving. How does an electronic expansion valve work EEV EXV.

What the expansion valve does is to only permit a small amount of the refrigerant to pass by and go into the coil. In the illustration below youll see that low pressure gas flows out of the evaporator coil and through the expansion valve. The valve holds back the high pressure liquid refrigerant from the condenser and controls how much refrigerant can pass into the evaporator.

The rod is attached to the diaphragm at.

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