How does an automatic expansion valve work? PDF Thermostatic and Automatic Expansion Valves For Refrigerators
The automatic expansion valve has a seat needle and spring tension-adjusting screw over him.The diagram shows that a fine-mesh strainer is included at the valve inlet.The small passage through the opening is blocked by debris in the refrigerant.The automatic expansion valve is designed to keep the pressure constant.This is achieved by the interplay of forces between the pressure in the evaporator and the spring pressure on him.The difference between the two causes the diaphragm to bend or move out of its seat.If the adjustment spring is set so that the valve keeps 69 PSIG in the evaporator, we can see how this works.The needle will remain in its present position if the pressure in the evaporator and the spring is in equilibrium.Push();!-- google_ad_client: "ca-pub 2749758595940365"Spring pressure goes up as the pressure in the evaporator goes down.The needle valves are opened by the pressure of the diaphragm.More evaporator surface is flooded when RSS increases.More gas will evaporate and the pressure will return 69 pounds per square inch if adequate cooling load is available.The pressure is back in balance.The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
The automatic expansion valve is designed to keep the pressure constant.This is achieved by the interplay of forces between the pressure in the evaporator and the spring pressure on him.The difference between the two causes the diaphragm to bend or move out of its seat.If the adjustment spring is set so that the valve keeps 69 PSIG in the evaporator, we can see how this works.The needle will remain in its present position if the pressure in the evaporator and the spring is in equilibrium.Push();!-- google_ad_client: "ca-pub 2749758595940365"Spring pressure goes up as the pressure in the evaporator goes down.The needle valves are opened by the pressure of the diaphragm.More evaporator surface is flooded when RSS increases.More gas will evaporate and the pressure will return 69 pounds per square inch if adequate cooling load is available.The pressure is back in balance.The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
If the adjustment spring is set so that the valve keeps 69 PSIG in the evaporator, we can see how this works.The needle will remain in its present position if the pressure in the evaporator and the spring is in equilibrium.Push();!-- google_ad_client: "ca-pub 2749758595940365"Spring pressure goes up as the pressure in the evaporator goes down.The needle valves are opened by the pressure of the diaphragm.More evaporator surface is flooded when RSS increases.More gas will evaporate and the pressure will return 69 pounds per square inch if adequate cooling load is available.The pressure is back in balance.The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
If the adjustment spring is set so that the valve keeps 69 PSIG in the evaporator, we can see how this works.The needle will remain in its present position if the pressure in the evaporator and the spring is in equilibrium.Push();!-- google_ad_client: "ca-pub 2749758595940365"Spring pressure goes up as the pressure in the evaporator goes down.The needle valves are opened by the pressure of the diaphragm.More evaporator surface is flooded when RSS increases.More gas will evaporate and the pressure will return 69 pounds per square inch if adequate cooling load is available.The pressure is back in balance.The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
!-- "ca-pub 2749758595940365" is the name of the client.
Spring pressure goes up as the pressure in the evaporator goes down.The needle valves are opened by the pressure of the diaphragm.More evaporator surface is flooded when RSS increases.More gas will evaporate and the pressure will return 69 pounds per square inch if adequate cooling load is available.The pressure is back in balance.The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
Spring pressure goes up as the pressure in the evaporator goes down.The needle valves are opened by the pressure of the diaphragm.More evaporator surface is flooded when RSS increases.More gas will evaporate and the pressure will return 69 pounds per square inch if adequate cooling load is available.The pressure is back in balance.The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
The spring pressure can't be overcome if the pressure rises above 69 pounds per square inch.This is a needle valve.Refrigerant flow is reduced and the surface area is flooded.The pressure returned is 69 pounds per square inch.Spring and pressure are brought back into balance by this action.When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
When the compressor stops, there will be some liquid refrigerant left in the evaporator, which will continue to boil.When the compressor can't remove this pair, the blood pressure in the coil goes up and the valve is closed.All the outside of the loop is closed.When the compressor cycles ago, the pressure in the evaporator drops quickly, allowing the needle valve to open and liquid refrigerant to flow into it.The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
The lack of automatic expansion valve is because it is designed to respond to the pressure of the evaporator instead of a cooling load.The state of the refrigerant can be used under certain loads.Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.
Less liquid refrigerant will boil in pairs if the cooling load is reduced.The pressure in the fall causes a needle valve to open.More flowing leads to more flooding of its surface.If the load is enough, the pressure in the evaporator can be increased again.The liquid refrigerant will flow at the outlet.There is a serious threat to the compressor.More liquid refrigerant will go in pairs if the load increases.This will cause the needle valve to close in the direction of closed.The pressure in the evaporator can be lowered if the refrigerant is less.The valve will return to normal.The refrigerant inside becomes more overheated when there is less flooding.The cooling capacity of the Evaporator is likely to be insufficient for the work.The overheating of the compressor can lead to high compressor discharge temperatures and pressures, oil breakdown, carbonization valves, and low efficiency.On low-power equipment with a relatively constant load, the automatic expansion valve is used.Domestic and small retail freezer cabinets are examples.