T\u1ee7 l\u1ea1nh ch\u1ee7 y\u1ebfu do ba th\u00e0nh ph\u1ea7n l\u1edbn l\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 khung v\u1ecf t\u1ee7 c\u1ea5u t\u1ea1o th\u00e0nh, trong \u0111\u00f3 quan tr\u1ecdng nh\u1ea5t l\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh. N\u00f3 do m\u00e1y n\u00e9n kh\u00ed, b\u1ed9 ng\u01b0ng t\u1ee5, b\u1ed9 l\u1ecdc kh\u00f4, \u1ed1ng mao d\u1eabn v\u00e0 b\u1ed9 b\u1ed1c h\u01a1i h\u1ee3p th\u00e0nh. Ch\u00fang l\u1ea5y m\u00e1y n\u00e9n kh\u00ed l\u00e0m trung t\u00e2m, li\u00ean k\u1ebft th\u00e0nh m\u1ed9t \u0111\u01b0\u1eddng kh\u00e9p k\u00edn tu\u1ea7n ho\u00e0n: m\u00e1y n\u00e9n kh\u00ed \u2192 b\u1ed9 ng\u01b0ng t\u1ee5 \u2192 b\u1ed9 l\u1ecdc kh\u00f4 \u2192 \u1ed1ng mao d\u1eabn \u2192 b\u1ed9 b\u1ed1c h\u01a1i \u2192 m\u00e1y n\u00e9n kh\u00ed. Ch\u1ea5t l\u00e0m l\u1ea1nh tu\u1ea7n ho\u00e0n ch\u1ea1y trong \u0111\u01b0\u1eddng kh\u00e9p k\u00edn n\u00e0y l\u00e0 freon c\u1ee7a kh\u00ed quy\u1ec3n, \u1ea3nh h\u01b0\u1edfng t\u1edbi m\u00f4i tr\u01b0\u1eddng s\u1ed1ng c\u1ee7a con ng\u01b0\u1eddi, n\u00ean hi\u1ec7n nay ng\u01b0\u1eddi ta \u0111\u00e3 thay n\u00f3 b\u1eb1ng m\u1ed9t ch\u1ea5t l\u00e0m l\u1ea1nh m\u1edbi \u0111\u1ec3 s\u1ea3n xu\u1ea5t ra m\u1ed9t th\u1ebf h\u1ec7 m\u1edbi t\u1ee7 l\u1ea1nh xanh.<\/p>\n\n\n\n
Trong m\u00e1y n\u00e9n kh\u00ed c\u00f3 m\u00f4 t\u01a1 v\u00e0 xi lanh. Sau khi n\u1ed1i \u0111i\u1ec7n, m\u00f4 t\u01a1 quay v\u1edbi t\u1ed1c \u0111\u1ed9 cao, \u0111\u1ea9y p\u00edt t\u00f4ng trong xi lanh chuy\u1ec3n \u0111\u1ed9ng t\u1edbi lui, ph\u00e1t ra ti\u1ebfng r\u00ec r\u00ec \u0111\u1ec1u \u0111\u1eb7n. N\u00f3 li\u00ean mi\u00ean kh\u00f4ng ng\u1eebng h\u00fat ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 kh\u00ed \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u00e1p su\u1ea5t th\u1ea5p t\u1eeb trong b\u1ed9 b\u1ed1c h\u01a1i v\u00e0o, v\u00e0 d\u01b0\u1edbi \u00e1p l\u1ef1c l\u1edbn m\u1ea1nh c\u1ee7a p\u00edt t\u00f4ng, ch\u00fang b\u1ecb n\u00e9n th\u00e0nh ch\u1ea5t kh\u00ed nhi\u1ec7t \u0111\u1ed9 cao, sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ed9 ng\u01b0ng t\u1ee5.<\/p>\n\n\n\n
B\u1ed9 ng\u01b0ng t\u1ee5 c\u00f3 n\u0103ng l\u1ef1c t\u1ea3n nhi\u1ec7t nhanh ch\u00f3ng. N\u00f3 c\u00f3 nh\u1eefng \u0111\u01b0\u1eddng \u1ed1ng u\u1ed1n kh\u00fac v\u00e0 nh\u1eefng t\u1ea5m to\u1ea3 nhi\u1ec7t x\u1ebfp d\u00e0y \u0111\u1eb7c, di\u1ec7n t\u00edch ti\u1ebfp x\u00fac h\u1eefu hi\u1ec7u v\u1edbi kh\u00f4ng kh\u00ed r\u1ea5t l\u1edbn, nhi\u1ec7t l\u01b0\u1ee3ng s\u1ebd t\u00e1n ph\u00e1t r\u1ea5t nhanh v\u00e0o kh\u00f4ng kh\u00ed. Ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 kh\u00ed \u1edf nhi\u1ec7t \u0111\u1ed9 cao, \u00e1p su\u1ea5t cao, th\u00f4ng qua t\u1ea3n nhi\u1ec7t c\u1ee7a b\u1ed9 ng\u01b0ng t\u1ee5, nhi\u1ec7t \u0111\u1ed9 c\u00f3 ph\u1ea7n h\u1ea1 xu\u1ed1ng, song \u00e1p su\u1ea5t v\u1eabn r\u1ea5t cao, t\u1eeb th\u1ec3 kh\u00ed bi\u1ebfn th\u00e0nh th\u1ec3 l\u1ecfng. B\u1ed9 l\u1ecdc kh\u00f4 n\u1eb1m \u1edf b\u00ean d\u01b0\u1edbi c\u1ee7a b\u1ed9 ng\u01b0ng t\u1ee5, d\u00f9ng \u0111\u1ec3 l\u1ecdc ch\u1ea5t b\u1ea9n v\u00e0 l\u01b0\u1ee3ng n\u01b0\u1edbc b\u00e1m ch\u1ee9a trong ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 l\u1ecfng. Ch\u1ea5t n\u00e0y \u0111i ti\u1ebfp v\u00e0o \u1ed1ng mao d\u1eabn v\u1eeba m\u1ea3nh v\u1eeba d\u00e0i. \u1ed0ng mao d\u1eabn l\u00e0 m\u1ed9t \u0111o\u1ea1n \u1ed1ng \u0111\u1ed3ng m\u1ea3nh h\u00ecnh xo\u1eafn \u1ed1c, \u0111\u01b0\u1eddng k\u00ednh trong ch\u1ec9 b\u1eb1ng 0,2 – 0,3 mm. N\u00f3 c\u00f3 t\u00e1c d\u1ee5ng ti\u1ebft l\u01b0u, l\u00e0m cho ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 l\u1ecfng \u0111i v\u00e0o b\u1ed9 b\u1ed1c h\u01a1i.<\/p>\n\n\n\n
B\u1ed9 b\u1ed1c h\u01a1i l\u00e0 m\u1ed9t h\u1ed1c kim lo\u1ea1i h\u00ecnh \u1ed1ng \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n \u1ed1ng mao d\u1eabn nhi\u1ec1u, l\u1eafp \u0111\u1eb7t \u1edf trong ng\u0103n \u0111\u00f4ng l\u1ea1nh. T\u1eeb \u1ed1ng mao d\u1eabn \u0111\u1ebfn b\u1ed9 b\u1ed1c h\u01a1i, \u1edf ch\u1ed7 l\u1ed7 n\u1ed1i, \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a \u1ed1ng \u0111\u1ed9t ng\u1ed9t t\u1eeb b\u00e9 bi\u1ebfn th\u00e0nh l\u1edbn; khi ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 l\u1ecfng \u0111i v\u00e0o b\u1ed9 b\u1ed1c h\u01a1i th\u00ec d\u01b0\u1eddng nh\u01b0 \u0111i v\u00e0o m\u1ed9t “th\u1ebf gi\u1edbi m\u00eanh m\u00f4ng” kh\u00f4ng r\u00e0ng bu\u1ed9c, \u00e1p l\u1ef1c b\u1ed7ng ch\u1ed1c t\u1ee5t th\u1ea5p, ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 l\u1ecfng nhanh ch\u00f3ng b\u1ed1c h\u01a1i th\u00e0nh th\u1ec3 kh\u00ed, h\u1ea5p thu m\u1ed9t l\u01b0\u1ee3ng l\u1edbn nhi\u1ec7t l\u01b0\u1ee3ng trong ng\u0103n \u0111\u00f4ng l\u1ea1nh c\u1ee7a t\u1ee7 l\u1ea1nh.<\/p>\n\n\n\n
L\u00fac \u1ea5y, ch\u1ea5t l\u00e0m l\u1ea1nh th\u1ec3 kh\u00ed \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, \u00e1p su\u1ea5t th\u1ea5p trong b\u1ed9 b\u1ed1c h\u01a1i l\u1ea1i m\u1ed9t l\u1ea7n n\u1eefa b\u1ecb m\u00e1y n\u00e9n kh\u00ed h\u00fat v\u00e0o, b\u01b0\u1edbc ti\u1ebfp v\u00e0o m\u1ed9t v\u00f2ng l\u00e0m l\u1ea1nh kh\u00e9p k\u00edn m\u1edbi. C\u1ee9 quay \u0111i quay l\u1ea1i nh\u01b0 v\u1eady, m\u1ed9t v\u00f2ng r\u1ed3i l\u1ea1i m\u1ed9t v\u00f2ng l\u00e0m l\u1ea1nh kh\u00e9p k\u00edn, nhi\u1ec7t \u0111\u1ed9 trong t\u1ee7 l\u1ea1nh t\u1eeb t\u1eeb h\u1ea1 xu\u1ed1ng, cho \u0111\u1ebfn khi \u0111\u1ea1t \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 l\u00e0m l\u1ea1nh theo y\u00eau c\u1ea7u quy \u0111\u1ecbnh th\u00ec m\u00e1y n\u00e9n kh\u00ed m\u1edbi t\u1ef1 \u0111\u1ed9ng ng\u1eebng chuy\u1ec3n \u0111\u1ed9ng.<\/p>\n\n\n\n
Do \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng, t\u1ee7 l\u1ea1nh l\u00e0m l\u1ea1nh d\u1ef1a v\u00e0o s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a m\u00e1y n\u00e9n kh\u00ed, th\u00fac \u0111\u1ea9y ch\u1ea5t l\u00e0m l\u1ea1nh ti\u1ebfn h\u00e0nh l\u00e0m l\u1ea1nh. Ch\u1ea5t l\u00e0m l\u1ea1nh h\u00fat m\u1ed9t l\u01b0\u1ee3ng l\u1edbn nhi\u1ec7t l\u01b0\u1ee3ng trong b\u1ed9 b\u1ed1c h\u01a1i “t\u01b0\u1edbc \u0111o\u1ea1t” \u0111i nhi\u1ec7t l\u01b0\u1ee3ng c\u1ee7a th\u1ef1c ph\u1ea9m c\u1ea5t trong t\u1ee7 l\u1ea1nh, r\u1ed3i th\u00f4ng qua b\u1ed9 ng\u01b0ng t\u1ee5 m\u00e0 chuy\u1ec3n d\u1eddi ra ngo\u00e0i t\u1ee7 l\u1ea1nh, t\u00e1n ph\u00e1t v\u00e0o kh\u00f4ng kh\u00ed. Cho n\u00ean b\u1ec1 m\u1eb7t c\u1ee7a m\u00e1y n\u00e9n kh\u00ed v\u00e0 c\u1ee7a b\u1ed9 ng\u01b0ng t\u1ee5 r\u1ea5t n\u00f3ng. Khi b\u1ed1 tr\u00ed t\u1ee7 l\u1ea1nh, c\u1ea7n ph\u1ea3i c\u00e1ch m\u1eb7t t\u01b0\u1eddng 10 cm tr\u1edf l\u00ean. \u0110\u00f3 l\u00e0 c\u00e1ch gi\u00fap cho b\u1ed9 ng\u01b0ng t\u1ee5 to\u1ea3 nhi\u1ec7t.<\/p>\n\n\n\n
H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a t\u1ee7 l\u1ea1nh ch\u1ee7 y\u1ebfu c\u00f3 \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec1u khi\u1ec3n tan b\u0103ng, \u0111i\u1ec1u khi\u1ec3n kh\u1edfi \u0111\u1ed9ng m\u00f4t\u01a1 trong m\u00e1y n\u00e9n kh\u00ed, \u0111i\u1ec1u khi\u1ec3n v\u1eadn h\u00e0nh an to\u00e0n c\u1ee7a m\u00f4t\u01a1 v.v. H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 b\u1ea3o \u0111\u1ea3m cho ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh.<\/p>\n\n\n\n
Khung v\u1ecf c\u1ee7a t\u1ee7 l\u1ea1nh c\u00f3 t\u00ednh n\u0103ng c\u00e1ch nhi\u1ec7t h\u1ebft s\u1ee9c t\u1ed1t. N\u00f3 ng\u0103n c\u00e1ch t\u1ee7 l\u1ea1nh th\u00e0nh m\u1ed9t kh\u00f4ng gian c\u00e1ch li v\u1edbi b\u00ean ngo\u00e0i. Trong t\u1ee7 l\u1ea1nh n\u00f3i chung chia th\u00e0nh hai ph\u1ea7n: ng\u0103n \u0111\u00f4ng l\u1ea1nh v\u00e0 ng\u0103n c\u1ea5t gi\u1eef l\u1ea1nh. B\u1ed9 b\u1ed1c h\u01a1i c\u1ee7a t\u1ee7 l\u1ea1nh l\u1eafp \u0111\u1eb7t \u1edf ng\u0103n \u0111\u00f4ng l\u1ea1nh. Cho n\u00ean nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ng\u0103n \u0111\u00f4ng l\u1ea1nh t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p. Nhi\u1ec7t \u0111\u1ed9 trong ng\u0103n c\u1ea5t gi\u1eef l\u1ea1nh cao h\u01a1n ng\u0103n \u0111\u00f4ng l\u1ea1nh m\u1ed9t \u00edt. Th\u1ef1c ph\u1ea9m \u0111\u1ec3 \u1edf trong t\u1ee7 l\u1ea1nh c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh \u0111\u00f4ng l\u1ea1nh ho\u1eb7c c\u1ea5t gi\u1eef l\u1ea1nh.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: T\u1ee7 l\u1ea1nh; Ch\u1ea5t l\u00e0m l\u1ea1nh;M\u00e1y n\u00e9n kh\u00ed; B\u1ed9 ng\u01b0ng t\u1ee5; B\u1ed9 b\u1ed1c h\u01a1i.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
T\u1ee7 l\u1ea1nh ch\u1ee7 y\u1ebfu do ba th\u00e0nh ph\u1ea7n l\u1edbn l\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 khung v\u1ecf t\u1ee7 c\u1ea5u t\u1ea1o th\u00e0nh, trong \u0111\u00f3 quan tr\u1ecdng nh\u1ea5t l\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh. N\u00f3 do m\u00e1y n\u00e9n kh\u00ed, b\u1ed9 ng\u01b0ng t\u1ee5, b\u1ed9 l\u1ecdc kh\u00f4, \u1ed1ng mao d\u1eabn v\u00e0 b\u1ed9 b\u1ed1c h\u01a1i h\u1ee3p th\u00e0nh. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,7],"tags":[],"class_list":["post-5948","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5948","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=5948"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5948\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5948"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}