榨汁机——机械类毕业设设计中英文翻译、外文文献翻译.pdf
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榨汁机——机械类毕业设设计中英文翻译、外文文献翻译,外文原文? the honest guide to choosing a juicer in the 1930's a chap called dr norman walker invented a juicer which firstly grated and then cut produce. the result...
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外文原文?
The Honest Guide to Choosing a Juicer In the 1930's a chap called Dr Norman Walker invented a juicer which firstly
grated and then cut produce. The resulting mass was then to be put into a linen bag
and placed under a hydraulic press, directing juice down a spout. (Dr Walker lived
to 108 years of age - he died in a surfing accident). You can still purchase this
2-stage "Norwalk" machine for around $2000, which is a very prohibitive price
indeed. And most of the juicers you will find on sale haven't evolved much since
then, which brings us to...Centrifugal juicers. Centrifugal juicers work by using a
flat cutting blade on the bottom of a rapidly spinning strainer. Cut produce is flung
out over the sides of the strainer. Due to the centrifugal force, juice then passes
through tiny holes in the strainer. Features intrinsic to this design include:
? The strainers are HUGE and a pain to clean
? The cutting blades are tricky to clean and some are particularly dangerous to
handle
? The process incorporates mass oxidization and therefore a 'dying' and brown
juice
? There is a lot of unpleasant froth
? Leafy green vegetables are impossible, so no herbs and no wheatgrass
? Pulp builds up in the strainer and efficiency falls rapidly
? The centrifugal force pushes a lot of pulp through the strainer, resulting in a lot
of pulp in the juice
? These juicers can seriously damage your hearing, and won't be popular in a
terraced house or flat, or if anyone is still in bed
Ultimately, the technology inside a centrifugal juicer is not unlike that of a
tree cutter. They're spinning at up to10000rpm. The resulting frictional heat is not
good for your juice. Neither is 10000rpm an easy task for a motor when under
constant resistance. The amount you can spend on a centrifugal juicer varies from
￡30 to over ￡100 - so what are you paying for? Well, in truth, mostly brand name
and aesthetic design. While the cheapest of machines are certainly week hearted
and not going to last you long, experience and feedback tells us that more
expensive machines don't necessarily last any longer. In fact, if everyone who
bought a juicer used their machine every day we think nearly every machine on the
market would be withdrawn because with daily usage virtually all machines would
fail within their first year, let alone within warranty. This guide has been written as
a result of the cumulative experience of several people, spanning over 4 years and
many many juices. In this guide you will:
? discover clearly the best type of juicer for you
? pinpoint the best machine in each category
? be saved from the confusion of conflicting promotional material
? benefit from unique comparison charts and photos
? gain links to background information and in dependant reviews
And that's a brave statement for us to make but far braver is the warranty
provided with juicers. Most people we speak to that have burnt out previous
machines never even took it back. We live in a throw away society sadly, but it's
great for manufacturers. Another fact of society is how many of us 'shelve' new
products. In a recent survey juicers were found to be the most likely new item to be
left in the cupboard, second only to the George Foreman style grills. We believe
this is because of the above drawbacks of this style of juicer - as the high street
centrifugal is by far the most purchased type of juicer in the UK. Centrifugal juicers
that handle whole produce. WOW! what a feature, whole apples, whole heads of
celery. Having said that, impatience isn't the highest virtue. One health food author
tells us "it's great being able to put in a whole head of celery, but the motor keeps
burning out and I have to take it back to the shop". Ultimately, this feature is one of
convenience, but the process still destroys the juice, and you still have to clean up
after every glass produced as the strainer clog seven more rapidly.
The juicers themselves have had no technical redesign other than a widening
of their feeding chute, so there has been no consideration of increased motor
resistance. Also, a wide feeding chute is extremely dangerous an adult could loose
their whole arm in there. Also, anything that doesn't fill the chute rattles all over the
place, like a simple carrot. Generally there is immense volumes of foam and the
juicers dump a lot of pulp into the juice which then requires straining. How many
juicers do you want to buy this year? One last word on whole fruit juicing: animals
that live inside fruit. Think about it, even if your juicer can take whole apples,
maybe it's worth quartering each apple first.... worm juice anyone? Centrifugal
juicers with pulp ejection. A relatively small mar..
The Honest Guide to Choosing a Juicer In the 1930's a chap called Dr Norman Walker invented a juicer which firstly
grated and then cut produce. The resulting mass was then to be put into a linen bag
and placed under a hydraulic press, directing juice down a spout. (Dr Walker lived
to 108 years of age - he died in a surfing accident). You can still purchase this
2-stage "Norwalk" machine for around $2000, which is a very prohibitive price
indeed. And most of the juicers you will find on sale haven't evolved much since
then, which brings us to...Centrifugal juicers. Centrifugal juicers work by using a
flat cutting blade on the bottom of a rapidly spinning strainer. Cut produce is flung
out over the sides of the strainer. Due to the centrifugal force, juice then passes
through tiny holes in the strainer. Features intrinsic to this design include:
? The strainers are HUGE and a pain to clean
? The cutting blades are tricky to clean and some are particularly dangerous to
handle
? The process incorporates mass oxidization and therefore a 'dying' and brown
juice
? There is a lot of unpleasant froth
? Leafy green vegetables are impossible, so no herbs and no wheatgrass
? Pulp builds up in the strainer and efficiency falls rapidly
? The centrifugal force pushes a lot of pulp through the strainer, resulting in a lot
of pulp in the juice
? These juicers can seriously damage your hearing, and won't be popular in a
terraced house or flat, or if anyone is still in bed
Ultimately, the technology inside a centrifugal juicer is not unlike that of a
tree cutter. They're spinning at up to10000rpm. The resulting frictional heat is not
good for your juice. Neither is 10000rpm an easy task for a motor when under
constant resistance. The amount you can spend on a centrifugal juicer varies from
￡30 to over ￡100 - so what are you paying for? Well, in truth, mostly brand name
and aesthetic design. While the cheapest of machines are certainly week hearted
and not going to last you long, experience and feedback tells us that more
expensive machines don't necessarily last any longer. In fact, if everyone who
bought a juicer used their machine every day we think nearly every machine on the
market would be withdrawn because with daily usage virtually all machines would
fail within their first year, let alone within warranty. This guide has been written as
a result of the cumulative experience of several people, spanning over 4 years and
many many juices. In this guide you will:
? discover clearly the best type of juicer for you
? pinpoint the best machine in each category
? be saved from the confusion of conflicting promotional material
? benefit from unique comparison charts and photos
? gain links to background information and in dependant reviews
And that's a brave statement for us to make but far braver is the warranty
provided with juicers. Most people we speak to that have burnt out previous
machines never even took it back. We live in a throw away society sadly, but it's
great for manufacturers. Another fact of society is how many of us 'shelve' new
products. In a recent survey juicers were found to be the most likely new item to be
left in the cupboard, second only to the George Foreman style grills. We believe
this is because of the above drawbacks of this style of juicer - as the high street
centrifugal is by far the most purchased type of juicer in the UK. Centrifugal juicers
that handle whole produce. WOW! what a feature, whole apples, whole heads of
celery. Having said that, impatience isn't the highest virtue. One health food author
tells us "it's great being able to put in a whole head of celery, but the motor keeps
burning out and I have to take it back to the shop". Ultimately, this feature is one of
convenience, but the process still destroys the juice, and you still have to clean up
after every glass produced as the strainer clog seven more rapidly.
The juicers themselves have had no technical redesign other than a widening
of their feeding chute, so there has been no consideration of increased motor
resistance. Also, a wide feeding chute is extremely dangerous an adult could loose
their whole arm in there. Also, anything that doesn't fill the chute rattles all over the
place, like a simple carrot. Generally there is immense volumes of foam and the
juicers dump a lot of pulp into the juice which then requires straining. How many
juicers do you want to buy this year? One last word on whole fruit juicing: animals
that live inside fruit. Think about it, even if your juicer can take whole apples,
maybe it's worth quartering each apple first.... worm juice anyone? Centrifugal
juicers with pulp ejection. A relatively small mar..
