Paul what do you do for work? .. as it's obviously in a technical / practical role as your always filming on the job by the looks of it .. and have tool's & equipment at hand
Im always amazed at how creative these little engineering solutions are . Using the state of the superheated fluid to regulate the thermal expansion valve is actually a stroke of brilliance, its always incredible to see the ingenuity that went into designing the most obvious things.
The key component to your video was Doing the cut away on the valve. It gave me a clear understanding on how the TX valve operates. Good job. Thank you.
Sure andtemperatureofthe refrigent controld in the systomsince this bulbis attached to thesushion linethe tempperutureofthe bulbis thatofthe suction gas when the gas temperure increusethe presure inside bellows also increase and the valve stem moves down spring tesionand evaportator pressure pushes the stem up from the botyom of the bellows .
Mind blown. Been in an apartment maintenance tech for almost a year and I'm just realizing the original installers never tied the bulb on the other side of the coils. Makes so much sense now. Thank you for this video
I just watched this video out of curiosity for wanting to know how refrigerators work. Did't expect to understand anything. I'm amazed by the fact that i really could understand most of the parts.
I remember the time during my apprenticeship our chef technician can not answer correctly of my question about what is the used of the sensing valve I’m not satisfied with his answer what I did was I bought expansion valve and I cut it in a lengthwise just to understand how it works just like you did lol..that was my unforgettable moment of being a refrigeration/airconditioning technician
These videos are as good as it gets but just in case no ones pointed it out, it says “whats inside a filter dryer” a few mins in - that said your videos are great. If you can idiot proof them even more for me I’d love it. Cheers
These videos are fantastic. You’re the best Engineering Mindset, I love your passion for sharing your knowledge and animated clips. Just a great way to learn, through seeing physical movement of parts; liquids, lubricants, magnetic fields etc as well as your explanations. Just brilliant!
Once am back on my feet working again, I will surely buy you a cup of coffee Paul, I really love your hard work and thorough step by step guide into a mechanical system, I would love if you work through more systems.
Thank you. Most explanations of the TXV usually omit the cartridge that the diaphragm pin pushes down on, and the subsequent conical orifice that allows the change in refrigerant state to occur. I remain puzzled as to where the heat of the incoming refrigerant is dissipated and escapes to, as the brass body of the valve does not seem large enough to disseminate the heat. It obviously does, and is of optimum design, but it just does not seem to be enough mass to transfer the heat to the air. Thank you, a nice demonstration.
The heat doesn't escape from the body of the valve. As the refrigerant expands through the valve the particles have more space and stop colliding so much. Imagine a crowd pushing through a turnstile, the pushing side is tightly packed, hot, sweaty, noisey and everyone is colliding but once through the turnstile there's plenty of space to move around, tension reduces, no one's colliding anymore. Same energy just spread out. The heat is removed in the condenser
@@EngineeringMindset Thank you for your time, I will research further. Heat rises and is always dissipated to some degree. It's a complex physics proposition that goes beyond pressure, but that is the big block answer. Again, thank you for your time.
Well if the valve closes when the cooling load is less but the compressor might still be on, wouldn’t that cause the system to burst? Is there any specific control system for that as well? Loved the explanation!
the main function of txv is to convrrt liquid phase to gaseous phase and to reduce temp to absorv surrounding heat outside the tubes.This is a application of Boyles Law,the txv is designef to automatically regulate the flow of fluid.Eduardo here.
Youre the best man.. i love all your videos.. ezplaining it clearly.. you are foundations of young professionals.. keep it up.. live to the fullest to help others 👍🏻👍🏻👍🏻❤️🍻
The expansion valve removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a vapor in the evaporator. The high-pressure liquid refrigerant entering the expansion valve is quite warm. This may be verified by feeling the liquid line at its connection to the expansion valve.
thanks for creating such an amazing video. Watched so many videos where all theoretical explanation were given, however the detailed video prepared by your channel has cleared the fundamentals.
So the sensing bulb is hollow. But it has refrigerant inside the hollow cavity? So when you cut into one is the refrigerant released or do you have to add it before you put one into service?
Thank you so so much! This video made me learn and understand the concept as clear as crystal. Thank you for the patient, accurate and graphical explanation it was very informative!!
The last ac tech that came to my house to service the unit moved the sensing bulb away from the pipe that it was attached to. Do you know why. Do you think the TXV is not working properly? Is this ok? Or should I put it back where it was? About how much does it cost to replace the TXV? Thank you so much.
What are the symptoms if something is wrong with the expansion valve? If ice forms on the evaporator coils, can I fix it by reducing the flow of refrigerant?
Actually in auto AC coil icing is prevented by keeping flow steady (rather than decreasing it further) as evaporator refrigerant temp drops around 32F, so that the coil floods and the superheat becomes nil. That is, the TXV is acting as an AXV (automatic expansion valve) at that point. Still there's a compressor capacity control system should the return air temperature/refrigerant temperature drop down too much. However, gas cross charges are used as the control charge. Decreasing flow so that superheat climbs up actually results in the coil starving and progressively icing up from the inlet to the outlet.
ok very cool vid but I have a question in minute 4:16 you explain that the pin gets push by high pressure saturated liquid pushing the diaphragm up that pushes refrigerant to the sensing bulb and back and fort depending on the temp that you get from the evaporation coil so this refrigerant is never gets passed the diaphragm down to the pin? its only in the sensing bulb and capillary tubing and on top of the diaphragm? its independent from the refrigerant running in the lines right ?
Thanks for amazing knowledge. So i saw a small tube from expansion valve into the end evaporator (behind sensing bulb) but i dont know what is that? Can u explain for me, please!
@@MTA141 Yes, the sensing bulb doesn't mix refrigerant with the system, it is kept within the bulb, capillary and power head. The equalising line is system refrigerant, doesn't mix with the sensing bulb refrigerant. The equalising line takes pressure from the low side of the pressure distributor. The distributor is needed to split the outlet pipe from the tx valve into many pipes, used on a multipath evaporator. The distributor will unfortunately cause another extra pressure drop, without the equalising tube the tx valve wouldn't get the correct evaporator pressure.
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Can possible to explain screw compressor and air cooled chillers
Hi
Paul what do you do for work? .. as it's obviously in a technical / practical role as your always filming on the job by the looks of it .. and have tool's & equipment at hand
Also your video's help me learn all.these interesting and relevant engineering concept's i otherwise wouldn't understand .. so thank you very much
@@cocopopman-43 9í00
Im always amazed at how creative these little engineering solutions are . Using the state of the superheated fluid to regulate the thermal expansion valve is actually a stroke of brilliance, its always incredible to see the ingenuity that went into designing the most obvious things.
The key component to your video was Doing the cut away on the valve. It gave me a clear understanding on how the TX valve operates. Good job. Thank you.
Sure andtemperatureofthe refrigent controld in the systomsince this bulbis attached to thesushion linethe tempperutureofthe bulbis thatofthe suction gas when the gas temperure increusethe presure inside bellows also increase and the valve stem moves down spring tesionand evaportator pressure pushes the stem up from the botyom of the bellows .
These type of content is just GOLD because sometimes plumber/plumbing is a very broad and vague term
I'm in an HVAC class and these videos really are the best ones I found on RUclips. Thanks and keep it up!
that is how U succumb to "propaganda". Tk cr to exercise cation, and judge for your self !!!! !!!
Good sherinf gues
Mind blown. Been in an apartment maintenance tech for almost a year and I'm just realizing the original installers never tied the bulb on the other side of the coils. Makes so much sense now. Thank you for this video
I just watched this video out of curiosity for wanting to know how refrigerators work. Did't expect to understand anything. I'm amazed by the fact that i really could understand most of the parts.
I have no connection to the industry, i just like the technology, but I LOVE this channel
I remember the time during my apprenticeship our chef technician can not answer correctly of my question about what is the used of the sensing valve I’m not satisfied with his answer what I did was I bought expansion valve and I cut it in a lengthwise just to understand how it works just like you did lol..that was my unforgettable moment of being a refrigeration/airconditioning technician
It is crazy how well presented and understandable this is.
These videos are as good as it gets but just in case no ones pointed it out, it says “whats inside a filter dryer” a few mins in - that said your videos are great. If you can idiot proof them even more for me I’d love it. Cheers
You did a great job in clarifying the function of the Expansion valve.
These videos are fantastic. You’re the best Engineering Mindset, I love your passion for sharing your knowledge and animated clips. Just a great way to learn, through seeing physical movement of parts; liquids, lubricants, magnetic fields etc as well as your explanations. Just brilliant!
This is the type of video I've been looking for. Clarified things so well.
EXCELLENT VIDEO BRO ITS VERY EASY TO UNTERSTAND THE TXV WORKING PROCESS
The narrator is very knowledgeable and outspoken.
Once am back on my feet working again, I will surely buy you a cup of coffee Paul, I really love your hard work and thorough step by step guide into a mechanical system, I would love if you work through more systems.
Thank you. Most explanations of the TXV usually omit the cartridge that the diaphragm pin pushes down on, and the subsequent conical orifice that allows the change in refrigerant state to occur. I remain puzzled as to where the heat of the incoming refrigerant is dissipated and escapes to, as the brass body of the valve does not seem large enough to disseminate the heat. It obviously does, and is of optimum design, but it just does not seem to be enough mass to transfer the heat to the air. Thank you, a nice demonstration.
The heat doesn't escape from the body of the valve. As the refrigerant expands through the valve the particles have more space and stop colliding so much. Imagine a crowd pushing through a turnstile, the pushing side is tightly packed, hot, sweaty, noisey and everyone is colliding but once through the turnstile there's plenty of space to move around, tension reduces, no one's colliding anymore. Same energy just spread out. The heat is removed in the condenser
@@EngineeringMindset Thank you for your time, I will research further. Heat rises and is always dissipated to some degree. It's a complex physics proposition that goes beyond pressure, but that is the big block answer. Again, thank you for your time.
Thumbs up @@EngineeringMindset
Well if the valve closes when the cooling load is less but the compressor might still be on, wouldn’t that cause the system to burst? Is there any specific control system for that as well? Loved the explanation!
Through this video I learned a lot. thank you so much Sir.
Genius! Thanks for the amazing demo.
the main function of txv is to convrrt liquid phase to gaseous phase and to reduce temp to absorv surrounding heat outside the tubes.This is a application of Boyles Law,the txv is designef to automatically regulate the flow of fluid.Eduardo here.
Youre the best man.. i love all your videos.. ezplaining it clearly.. you are foundations of young professionals.. keep it up.. live to the fullest to help others 👍🏻👍🏻👍🏻❤️🍻
Really great videos. I’m from a domestic background now supervising comercial fit outs.
Your videos are invaluable.
Very awesome explanation of TXV. Good learning video.
Really appreciate very nice explanation, me too a senior insrtuctor of Hvac/R
How are you calculating the superheat. To know when system is adjusted properly? Frost on discharge?
Thank u so much Paul, very good in explaining
Wow, I didn't really think I'd find a good answer to my query. This is a million times better than I expected. Thanks!
Will u pliz make complte video about marine air conditioning system, how to cahrging freon, what kind of troble n how to fix it🙏
I just did a lab on this, and I didn't get it until this video. Thanks for the clear and concise explanation!
The expansion valve removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a vapor in the evaporator. The high-pressure liquid refrigerant entering the expansion valve is quite warm. This may be verified by feeling the liquid line at its connection to the expansion valve.
thanks for creating such an amazing video. Watched so many videos where all theoretical explanation were given, however the detailed video prepared by your channel has cleared the fundamentals.
great than you are sharing knowledge from danfoss wish i consider one of the best companies in the worlds it is growing ..... thanks
Excelent. Congrats from Argentina
Thanking you for increasing my knowledge......
So the sensing bulb is hollow. But it has refrigerant inside the hollow cavity? So when you cut into one is the refrigerant released or do you have to add it before you put one into service?
Have took em apart many times over the years but EEV’s are taking over now
Genius ! Very wel explained
Lov u sir from India.
Thank you, do you know we also have a Hindi channel? ruclips.net/channel/UCg4k338hz9U8jnD5SXPO5jQ
Awesome presentation 👌🏼
great explanation and fantastic graphics!!!
Excellent video and explanation...You did a great job...
Fantastic , kudos to your hard work
I finally understand how a TXV works, thank you for this video.
Very comprehensive videos. The illustrations have been impressive. Many thanks and appreciations.
A really good video. Appreciate your work!
Thank you so so much! This video made me learn and understand the concept as clear as crystal. Thank you for the patient, accurate and graphical explanation it was very informative!!
Great video, well explained.
your a god send. ive lurned so much from your videos. thanks for posting keep it up im watching :)
Great explaination👍👌
It's really very great vedio and it's much useful to me .... May I know what was the refrigerant use in the sensible bulb?
Please explain about the equalizing line also
This video is really awesome.
Some of Excellent value videos. Congratulations sir
Super video. Hey engineering mindset could u explain different diodes,resistor, transistor
Diodes explained: ruclips.net/video/Fwj_d3uO5g8/видео.html
Transistor video now live: ruclips.net/video/J4oO7PT_nzQ/видео.html
@@EngineeringMindset nice video
@@EngineeringMindset always the best
Check out NEW resistor video, everything covered! ➡️ ruclips.net/video/DYcLFHgVCn0/видео.html
👌Mind blowing explaination presentation bro.... Thank you so much
Everyone can easily understand..🙏🙏
thanks for the detailed explanation....
Please explain about how the pressure and temperature reduces after TXV.
a 2 TR TXV can handle the load of 1TR or 3TR if load varies like this?
I love that it doesn't need a chipset
Good videos for explaining the theory.
great annotations, very easy to follow
I find your videos very useful and informative. Do you have a video discussing Direct Expansion (DX) Systems?
Glad to hear, check out our video on supermarket hvac. Lots discussed there
@@EngineeringMindset Thanks!
love your contents man.
thanks In-depth quality video
I am so happy that I am subscribed to your channel, it's very useful and fun.
*I highly recommend subscribing to it* .
The last ac tech that came to my house to service the unit moved the sensing bulb away from the pipe that it was attached to. Do you know why. Do you think the TXV is not working properly? Is this ok? Or should I put it back where it was? About how much does it cost to replace the TXV? Thank you so much.
Thank you very much.very useful video
Thank you very much. Cause i have never seen TXV at class
Great video for students
If there is no air flow across the evaporator and superheat level is not reached, does the txv stay closed and not let any refrigerant to flow?
Excellent explaination as always that is why i subscribe to this channel
What are the symptoms if something is wrong with the expansion valve? If ice forms on the evaporator coils, can I fix it by reducing the flow of refrigerant?
Actually in auto AC coil icing is prevented by keeping flow steady (rather than decreasing it further) as evaporator refrigerant temp drops around 32F, so that the coil floods and the superheat becomes nil. That is, the TXV is acting as an AXV (automatic expansion valve) at that point. Still there's a compressor capacity control system should the return air temperature/refrigerant temperature drop down too much.
However, gas cross charges are used as the control charge.
Decreasing flow so that superheat climbs up actually results in the coil starving and progressively icing up from the inlet to the outlet.
excellent..interesting and easy to understand..keep going
ok very cool vid but I have a question in minute 4:16 you explain that the pin gets push by high pressure saturated liquid pushing the diaphragm up that pushes refrigerant to the sensing bulb and back and fort depending on the temp that you get from the evaporation coil so this refrigerant is never gets passed the diaphragm down to the pin? its only in the sensing bulb and capillary tubing and on top of the diaphragm?
its independent from the refrigerant running in the lines right ?
The graphics and effort are amazing!
You did amazing vedio..it helps a lot to us thank you so much..
Thanks for amazing knowledge. So i saw a small tube from expansion valve into the end evaporator (behind sensing bulb) but i dont know what is that? Can u explain for me, please!
It's an equalising line
@@EngineeringMindset Is it similar to sensing line? Sensing line take sense from outside tube and that line take from inside tube?
@@MTA141 Yes, the sensing bulb doesn't mix refrigerant with the system, it is kept within the bulb, capillary and power head. The equalising line is system refrigerant, doesn't mix with the sensing bulb refrigerant. The equalising line takes pressure from the low side of the pressure distributor. The distributor is needed to split the outlet pipe from the tx valve into many pipes, used on a multipath evaporator. The distributor will unfortunately cause another extra pressure drop, without the equalising tube the tx valve wouldn't get the correct evaporator pressure.
Super pls share knowledge about solinaid switch
How *TXV works* in detail ➡️ ruclips.net/video/oSLOHCOw3yg/видео.html
Thanks for this explanation
Wow 😮 this was VERY easy to understand
This was well done n thank you
thank you very much very nice and interesting videos every well explaining
Excellent presentation Mate from other side of the Pond.
Very very nice explanation, please provide the vedios in hindi version
Hindi channel now live! ruclips.net/video/j7dlywCbjF0/видео.html
The Best! Very nice.. thanks for this Video..
Woww.. great explanation❤❤
What type of refrigerant inside the sensing bulb??
Awesome video! Thank you!
Thank You! WOW! Im pretty sure im in love with you lmao Very nice work
Best explanation
Is it sensitive to welding heat
I had accident that the expansion valve exploded while welding
So the superheat spring is non-linear?
Outstanding vídeo, It desserves an OSCAR!!!
very well explained! Thanks for sharing.
Thank u very much ur video is very useful I wish u the best
The details in this video
Thank you so much
Thanks for this video share. So usefull .regards from Indonesia
Excellent video. I learn so much from it. Thank you very much, The Engineering Mindset!