Intern Experiments - 6

hii... so now the pull force experiment has starting showing result.. however it has not solved the problem fully. the door pull force if is around 4kgf then it can be considered ok.. but if one has to apply force higher than this its is considered to be a problem.we have drawn a correlation crudely btw the values of pressure and the corresponding force.
the force of 4kgf is shown when the pressure falls by .01psi below the atm pressure.hence we have fixed our aim to solve the problem by brining the force down to 4kgf in all the products.
we have been trying to reduce the force through vacuum valve and the fan delay .in some of the products this has proven to be sufficient , but in some products the force still is more than 4kgf. this is due to the variation in the different products of the the same model.
we then planned to carry out experiments as to where has been the differnce btw the products so that we can tackle the problem dually. we did the benchmarking of the two products which showed the two extreme of the results.however the benchmarking didnt gave us substantial results.
we then swapped the plenums of the two products so that the most important variable of the whole phenomena, fan can show us the difference when the plenum is replaced.

Intern Experiments - 5

hi friends .. i am back again...
meanwhile i also started working on the other project about which i mentioned earlier. this was the designing of the box on the top of the refrigerator...
we prepared engg drwings of a no of proto types.. we kept finalinzing one of the proto and started working on it... till now we have made three different protos ...
i did a lot of work before i started designing the proto.. i made a list of the most common things that are kept on the top of the ref.. this i made by connversing with the different people here in the whirlpool.. i then measured the dimensions of the those objects which this box was supposed to accommodate... when i had a rough idea of the dimension of the objects.. design process actually started...after this i decided the dimensions of the height and the width of the various other important features incorporating the previously measured dimensions...
i will post the photographs of the differnt proto that we made... thankfully the proto's were appreciated thoroghly here...:))
we then conducted a field review visit to bombay to get the feedback as well as inoit fromt he direct customers ..will write about the deatils of the visit next time.
also will write about the developements of the other project also..

Intern Experiments - 4

sorry for not been able to write for long... we have done a lot of experiments since then.... i will try to give you a feel of it...
we have identified the two main culprits behind the vacuum formation...( vacuum is something which we call it here . .. it is actually pressure falling below atm pressure .. so in that case its a kind of vacuum)
one it is the slamming of the door .. which we cant do without.... and the other is the starting of the fan soon after the slamming...we tried to seperate the effects due to the two.. we considered the delay of the fan motion after the door slamming...
the pressures come back to normal after a span of approx 30 s.. so we delayed the fan motion for 30 s.. so as two identify the two factors seperately...
the results were very conclusive and the pressure was reduced considerably.. the fan and the slamming together produce higher vacuum than the two separted effects... the peak occured on slamming..
these experiments were conducted in a kind of raw manner... then these experiments were conducted more precisely and acuurately in the performance lab, where the temp and humidity of the chamber is maintained at constant.
we then conducted our experiments there to confirm our findings...

after this we started a new set of experiments about which will i write soon...