How EEV works - Electronic Expansion Valve working principle, HVAC Basics

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How does an electronic expansion valve work EEV EXV. In this video we're going to cover the basic working principles for how an electronic expansion valve works in a refrigeration system. Learn HVAC enineering with animations and 3d models.
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14 июл 2024

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Комментарии : 131

@EngineeringMindset 6 лет назад

⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕ PayPal: www.paypal.me/TheEngineerinMindset

@soulisticalmades816 6 лет назад

The Engineering Mindset can you make a video about flow rate, pump capacity, pump pressure, how to calculate dimensions on copper pipes, pressure drop calculations, transmissions etc

@Murari1960 2 года назад

Please explain trouble shoot of over charge of refrigerant. Explain what happens to the system if the refrigerant is over charged and also under charge

@bijoydas449 Год назад

Sorry, sending money from my country is difficult .. else I would have. He definitely deserves that.

@Brexin212 6 лет назад

Just wanted to stop by and thank you for these videos. As a newer HVAC tech, these videos have taught me SO much more than anyone at my company has been able to teach me. Can you please make a video on Hard Start Kits and the difference from maybe SureStart Soft Start kit?

@EngineeringMindset 6 лет назад

Great to hear, glad you've found them helpful.

@jollyscaria1922 2 года назад

Very good

@bijoydas449 Год назад

The best presentation I have seen so far on Split Air Conditioning System. Very lucid, explained with beautiful animations and graphics. Thanks for the video series.

@edlauren9434 11 месяцев назад

Thank you for the video. Good explanation about EEV operation. P. S. These EEVs might be a very precise tool to control SuperHeat. However, it’s not as reliable as a TXV. Last year, I had 2 HeatCraft walk-in freezers at Baskin-Robbins restaurants that were acting crazy, flooding the condenser, cooling poorly. One compressor that was only 4 years old has died. Had several calls to HeatCraft tech support; adjusting the SuperHeat reading/calibration on the control board, replacing sensors…. Long story short, after a month of giggle-wiggle I’ve got rid of these electronic controls and EEVs. Installed TXV, defrost timer and regular mechanical thermostats… It’s been almost a year now. Both customers are happy with -5F; -7F. No complaints. Today, I ran into another walk-in cooler from HeatCraft. This one is a big evaporator with EEV and… it’s acting the same way as those small walk-in freezers were doing; SuoerHeat hunting, flooding the condenser, suction line saturation temperature goes from ~24F to 2.1F in a minute or two… and goes back to -22F… Again, I will try to repmm m Ave the SuperHeat sensor as it was suggested by HeatCraft tech support…. However, I’ve got a feeling that it will end up with another TXV.

@USA-GreedyMenOfNoIntegrity 4 месяца назад

Manufacturers use this junk because it is cheaper and you will have to come back to their greedy arses to purchase a special unique replacement part.

@fishmonger6879 Месяц назад

Would you compare it to an engine using a carburetor versus fuel injection?

@ashrafgharsan553 5 лет назад

That was one awesome explanation and many hours saved

@hubercats 2 года назад

Wonderfully clear presentation. Thank you!

@rawykhalif1583 5 лет назад

8 people who tick dislike, they fell in the exams of refrigeration and A/C Well done Paul. Thanks for your efforts mate.

@qasimkazmi786 5 лет назад

Excellent explaination i have seen ever..good job..thanks for making video

@TheLuckyman7726 4 года назад

I like understanding parts completely and this was perfect.

@jollyscaria1922 2 года назад

Un lucked iam befor the systome see but iam all some one playin and pin moetha playin iam respeact any jobe not play this jobe may be competseion come but gues all gruped play boy iam 29 yer 5yer workin got come tomuch lafeing some some only not all my all gue S

@berikbolzhandilov3657 4 года назад

Great work! Thank you!!!

@barbossajacksparrow9481 5 лет назад

Best video explanation!!!

@RineboBohead 5 лет назад

Helpful, thank you.

@harvindersingharora3845 4 года назад

I appreciate your effort. Very nice presentation.

@saeedhameed9148 4 года назад

Great video thanks for making it

@sillywaiii 5 лет назад

you are the best, bro

@mns.gh6432 3 года назад

So wonderful ur explaining

@abelurrutia1192 4 года назад

Great video. If you could make one explaining bidirectional TXV would’ve be great.

@asphalt_wloverine 6 лет назад

Amazing

@mahmoudhossamel-deen2559 5 лет назад

Very good thank you

@001prk 3 года назад

Appreciate your content on HVAC ! Could you make video on POSV usage and internal and external equaliser used upon TEV on chilled water system

@omararibi5808 4 года назад

Tank you so much for you

@andrewthacker114 4 года назад

Thanks good info

@Murari1960 2 года назад

Very informative

@chrismcinerney2995 5 лет назад

Good job💪🏻👍🏻🤙🏻

@doman3628 9 месяцев назад

Amazing!

@mithileshramteke3882 3 года назад

Thank you 😊

@Faz527 3 года назад

well explanied

@Razlazy227 5 лет назад

Please make video of, why actuator valve installed in return line?

@feelingzhakkaas 4 года назад

EXCELLENT INFORMATIVE VIDEO. GOD BLESS YOU. I V ONE QUESTION...WHAT IS MIN FLOW OF REFRIGERANT FOR RUNNING COMPRESSOR? HOW THIS IS ADJUSTED IN CONTROLLER?

@raulsantinolopezrodriguez8349 2 года назад

Gracias por la explicación, estuvo excelente. Una pregunta. Es igual la la válvula de expansión en un Digital Inverter que un Inverter, en su controlador??

@muhhamadjunaid9146 2 года назад

Hey paul, could you please make videos on Suction and discharge superheat?? Your videos are way more detailed than any other videos available in Internet. I hope you this message.

@EngineeringMindset 2 года назад

Have you seen our chiller essential terms video? Think I covered it in there. Although it was a long time ago, might have forgotten

@ozziewelcome5612 Год назад

Good 👍 👍

@sadikpathan9265 4 года назад

Supper Video sir . Sir meking a video Chiller Ac in All Faults . problem and Salutations...pls

@peter3904 2 года назад

감사합니다.

@EngineeringMindset 2 года назад

Thank you, Peter!

@oOcitizenOo 6 лет назад

Hey there! Do you plan to make a series of videos about all kinds of motors - steppers, asyncronous, etc and their features in terms of practical usage and basic theory stuff such as moment of inertia, idling? I mean, you have some videos but it would be interesting to see a bit more above basic leverl topics in terms of your awesome explanations!

@EngineeringMindset 6 лет назад

Absolutely, we have a few more mechanical based ones in production and the were going into electrical and electronics

@oOcitizenOo 6 лет назад

look forward to watching educative videos! :)

@mns.gh6432 3 года назад

Thnxs more

@benmilne3892 5 лет назад

Didn't explain where the energy savings comes from... but very nice video! Thank you

@movax20h 5 лет назад

I believe main saving comes from operating valve so minimal super heat is achieved more precisely. Additionally because they can also use pressure sensors, they can estimate super heat much more precisely. Together with PID controller and autotune, they can maintain more stable super heat temperatures, without cycling or overshoots. Additionally they can act like a solenoid valve sometimes, to shut refrigerant off, eliminating parts; as well allow multiple evaporators to cooperate and optimize operation; other option is to cooperate with compressor, both to prevent compressor flooding and by providing easier start to compressor. Additionally most controllers can detect failure of the electronic coil or the valve (stuck position) by measuring current or resistance, and send a signal to other place to shut off the system, and even pump down refrigerant from the system to a reservoir, and prevent system leaks (on stuck / broken valve, or when the sensors detect very abnormal performance). So some of the savings are in reduction in maintenance and preventing various failures too. And because they are electronic and do have controller, they can be managed and monitored remotely, helping with troubleshooting, maintenance and optimization. Some of these features are not due to the valve itself, but due to better insight into system due additional sensors already in place to support the valve. Some of the electronic expansion valves are used for other purposes than just super heat control after evaporator. Some are just used as normal valves to control pressure, i.e. after the condenser or various by pass systems. They are quite versatile. Plus they are easy to adjust electronically, if the refrigerant type is changed in a system.

@Froggability 4 года назад

With EEV, inverter units: compressor, ID and OD fans can all ramp down to about 20% , meanwhile maintaining optional superheat and subcooling. EEV greatly aids these happening, And also reduce the need for defrost cycle

@adexgtr7972 6 лет назад

Hi, can you make a video on how to select refrigeration system components (coils,compressors, pipes,..) after you calculate the BTUH required?

@redakounbi7144 5 лет назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0gv2tJf7nwo.html

@jollyscaria1922 Год назад

Ton one ton =12000BTu/hr 1Btu=252calories1ton =12000btu×3024000calories 1rob=3024000/1000=3224 kilo calorehr.....

@altamashsiddiqui3281 6 лет назад

Sir please make a video about difference between ac & dc motor and how to direct start our ac without PCB please sir thankyou

@EngineeringMindset 6 лет назад

We have more electrical videos coming soon. I'll add it to the list

@EngineeringMindset 4 года назад

DC motors explained ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GQatiB-JHdI.html

@rmsys18 5 лет назад

How long is the life span of EEV? Or how long is its operating hours before it malfunctions?

@ameenmakramey1274 7 месяцев назад

Professor, if you could please explain to us a video about the closed electric expansion valve, which carries the model EX7-121 from the working company Amrison, the method of connecting it to the driver, its maintenance, and its problems. I thank you for your cooperation. We greatly appreciate it.

@room6mptcl-22b8 5 лет назад

question : are the electronic expansion valve and linear expansion valve the same ? if not then whats the difference?

@tehsimo 6 лет назад

ElectronicExpansionValveBlog

@jtengineeringsolutions9580 4 года назад

Are we able to use the same to control the humidity

@MrStrix99 3 месяца назад

Hey. Thanks for the really informative video. Let’s say I want to place a refrigerant tank in my schematic. As the mass flow rate of the refrigerant can vary a lot (from lowest rating to highest rating) let’s say from few grams per second up to kilograms per second. Is that even possible? If so, I assume there should be a tank placed somewhere. Where would it be? Thanks !

@mk-yg6mi 4 года назад

Nice video indeed! How does the EEV work with a system where you have 4-way valve to turn evaporator to condenser and vice versa? Heat pumps with heating and cooling..

@EngineeringMindset 4 года назад

Check out our selection of free heat pump tutorials theengineeringmindset.com/heat-pumps/

@mk-yg6mi 4 года назад

@@EngineeringMindset thank you for not answering.

@Froggability 4 года назад

They work both in heating and cooling . Mini split eev ramp based on about 5-6 parameters mostly temp sensors

@Warlock1178x 4 года назад

@@mk-yg6mi bypass with an extra eev for cooling, his heat pumps basics explains it.

@bhathiyajayawardhane5093 4 года назад

Is that type of expansion valve used for 36000btu split type air conditioners?

@muhdnurali2505 Год назад

Does the EEV has filter like manual ordinary TEV?

@Vijesh-ue7ht 4 года назад

What does an equaliser line do in txv valve

@giorginho8831 2 года назад

In your rappresentation is the thread a left hand one?

@randallsnell5767 Год назад

Everyone in the trade needs to brush up on stepper motors.

@Paobayern 5 лет назад

How does the increase in cooling load increase the pressure? Doesn't it affect only the superheat?

@teravolt6113 5 лет назад

EEV systems have variable speed compressor, that is, low cooling loads make the valve close down to keep the required superheat once the evaporator becomes cold and this tells the compressor to "unload" reducing head pressure, and vice versa. The AC system in my car works exactly like this even though it has a TXV and not an EEV. As soon as the TXV begins closing down to keep superheat constant even with a cold evaporator, a valve in the compressor senses the decreasing suction pressure and "unloads" the compressor. You distinctly hear the refrigerant flow reduce to a trickle and the compressor noise change after some seconds as the evaporator gets cold, if you hold an ear under the evaporator box...

@SmashXano 3 года назад

Did I get it right, that the expansion valve uses pressure losses in order to reduce or increase massflow, so as a result the transfered heat to the ambient air is reduced or increased? Because if the area the fluid is flowing through is reduced, friction and therefor pressure losses increases.

@user-yq5lz9eh2t 5 лет назад

When I install a new EEV into the air con, should we need to set again,the zero point of the step motor for the main processor know how far motor goes ?

@EngineeringMindset 5 лет назад

Read the manufacturers install notes

@Froggability 4 года назад

No, upon initial startup they self reset, travel to each end point to self check

@Limeayy 6 лет назад

Can i incorporate EEV's in a older system with mechanic TXV's/CCOTs?

@EngineeringMindset 6 лет назад

Almost certainly, it does depend on the system though. You can find a valve for your system here: bit.ly/Electronic-Expansion-Valves

@irham9856 Год назад

👍👍👍

@harshitshiyarwala9844 2 года назад

Can we relate this with PIBC valve??

@drisyakailas4358 3 года назад

Hi Paul, great video! Just one clarification: How this operation stops when the set temperature is achieved?. Means How is it collaborated with the thermostat operation. ? Anybody please reply.

@chasemcnamara9639 3 года назад

All refrigeration systems that use EEV's are computer controlled and have several sensors in the system. They also have a set "swing". For instance a multideck supermarket fresh meat case may drop down to 24F. This will close the stepper EEV valve or the pulse EEV valve which ever is being used. As soon as the valve closes the temperature starts to rise. The valve starts to reopen when the temp reaches 35F or so. That's the swing. The time between opening and closing of the EEV valve.

@munawarbhati30 3 года назад

As for as my knowledge, as a certain temperature reached, the EEV will close the refrigerant and your machine will stop. as the temperature rise machine will start but the EEV still will close until the suction press drop. Then the EER will open gradually.

@MuhammadAjmal-ly3lj 2 года назад

How to make inverter ac compressor bored tester oregenal ?

@davidvanzanten4385 Год назад

Can the same EEV work to do both heating and cooling (in the case of a heat pump)?

@Doug_The_Head Год назад

Even in case of HP EEV maintain superheat in evaporator (See "Heat Pumps Explained" at this channel). For reversing HPs it's a question of algorithm inside controller.

@STEINYY 3 года назад

Hey. Is there a Danfoss app for questions, training? Or do I just use the webbbrowser?

@EngineeringMindset 3 года назад

Sure is, lots of them. Search for danfoss on your phones app store

@STEINYY 3 года назад

@@EngineeringMindset yeah but haven’t found just that kind of app

@naseem_amr 2 года назад

Please provide all hvac related video in hindi

@EngineeringMindset 5 месяцев назад

www.youtube.com/@EngineeringMindsetHindi

@asifjutt8824 3 года назад

👍

@binhnguyenthanhbinh6254 4 года назад

After evaporator refrigerant is HIGH TEMPERATURE, in this video LOW TEMP, please explain help me!

@basspig Год назад

My Mr Cool minisplit has an EXV. Their tech tells me I don't have to be concerned with superheat numbers.

@bhaydipdhanani6856 Год назад

How many pulse required to open valve

@markhonea2461 Год назад

What a great presentation! But I fail to understand how this stepper motor driven device can produce more accurate results and more economical operation than a correctly installed and sized txv that has infinite control positioning. It appeared to me that the device would operate on predetermined levels, be it 10, or 100, I am unsure about that

@Doug_The_Head Год назад

Stepper motor EEVs usually have 200...3000+ control steps. In laboratory you can see the difference between 240 steps & 480 steps, to see the difference 480 vs 2400 you need very precise tools. In real practice you see no difference in EEV capacity regulation with true infinite capacity regulation. More accurate SH regulation achivied due to electronic control of the valve - faster reaction + "proactive" PID controller vs "reactive" mechanical control. P.S. Even PWM EEVs like Danfoss AKV or Alco EX2 are OK for supermarket applications.

@EngineeringMindset Год назад

See our new video on how to build mechanical versions of electronic circuits? Watch here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Zv9Q7ih48Uc.html

@hvactechniciangroup6570 6 лет назад

Dear sir Why refrigeration cycle choking and solution

@EngineeringMindset 6 лет назад

Hard to say basing only on "its choking" but from that I would guess not enough refrigerant is either in the system or passing into the evaporator. Call a refrigeration engineer to inspect.

@AbdulRehman-qs1ty 5 лет назад

How to diyrat eev ?

@haribabu9671 4 года назад

What is superheat?

@Arizona9001 10 месяцев назад

Hey my EEV looks completely different from the types you’ve shown, so then I’m having trouble visualizing how it works within my unit. It’s more like a rectangular tube with a plates on it. See EEV (USDM Denso) for 1993 FD3S.

@sujithks8449 3 года назад

Hi sir In auto mode exv not open.. But manualy exv working... Whats the problem.. We change exv controller and display.. But same problem

@wata_laf 3 года назад

What about LEV’s

@hvacservices 5 лет назад

Sir in mitsubishi vrf system indoor expansion valve is not working so what to do

@hvacservices 5 лет назад

Motor valve is not open so give me idea to open the valve

@EngineeringMindset 5 лет назад

My best advice. Check the model number and download the technician manual from the manufacturer website. It should contain troubleshooting options

@EngineeringMindset 2 года назад

New VRF unit video here:➡️ ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4i1XgcP1tmw.html

@soloaide1066 3 года назад

please i have a problem with EEV error but i do not known the particular indoor unit, the system is Samsung VRF once the come all the unit will not work all the remote will shoe error 151 please help me thanks

@EngineeringMindset 2 года назад

New VRF unit video here:➡️ ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4i1XgcP1tmw.html

@TheHuntermj 3 года назад

Those things are mad expensive!

@fokuspimp360 4 года назад

What happened to the VRF videos

@EngineeringMindset 2 года назад

New VRF unit video here:➡️ ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4i1XgcP1tmw.html

@nayanjagirdar8408 3 года назад

,👌👌👌👍

@stevebrawner9119 6 лет назад

Still not sure why you would use pressure when it's not needed. If you attach a thermistor at the outlet of the EEV and one at the outlet of the evaporator is that not true super heat? Following the refrigeration cycle if the outlet of the metering device is lquid vapor mix, then the refrigerant can not be super heated or sub cooled, and unless it's a Bose Einstein then in must be at boiling point, and any heat added to the refrigerant on the outlet side of the evaporator would be super heated by it's very definition. So why use a pressure transducer and then have a module simply convert it back to temperature any way. It's just one more thing to leak.

@charlesherrington2694 6 лет назад

Steve Brawner yep, the ones I see use line in line out thermistors to control the EEV. A suction pressure Transducer to control compressor speed.

@acengineer9128 5 лет назад

The reason is pressure losses are not taken into account with thermistor in and outlet controls. The distributor has a pressure loss and the evaporator to, the bigger the total pressure loss the bigger the superheat calculation error based on 2 thermistors. With small systems without a distributor and low pressure losses over the evaporator 2 thermistor calculations work perfectly.

@teravolt6113 5 лет назад

Remember that pressure changes much more rapidly than temperature does, so it's a much more precise way of controlling superheat (and compressor loading and unloading too).