{"id":4775,"date":"2021-04-27T17:07:31","date_gmt":"2021-04-27T15:07:31","guid":{"rendered":"https:\/\/www.iceshop.fr\/guide\/?p=4775"},"modified":"2022-02-16T16:07:38","modified_gmt":"2022-02-16T15:07:38","slug":"comment-fonctionne-le-circuit-frigorifique","status":"publish","type":"post","link":"https:\/\/www.iceshop.fr\/guide\/comment-fonctionne-le-circuit-frigorifique\/","title":{"rendered":"Comment fonctionne le circuit frigorifique?"},"content":{"rendered":"

Le circuit frigorifique d\u2019une chambre froide professionnelle<\/a> est compos\u00e9 d\u2019au moins quatre composants importants : un compresseur, un condenseur, un d\u00e9tendeur <\/strong>et un \u00e9vaporateur.<\/strong><\/p>\n

Les fluides frigorig\u00e8nes peuvent se pr\u00e9senter sous forme de liquide ou de vapeur. Ils facilitent les \u00e9changes de chaleur<\/strong> au sein du circuit frigorifique gr\u00e2ce \u00e0 leur changement d\u2019\u00e9tat en passant par le condenseur et l\u2019\u00e9vaporateur.<\/p>\n

Dans les m\u00e9tiers du froid <\/strong>et de la climatisation, ces fluides peuvent \u00eatre utilis\u00e9s purs ou m\u00e9lang\u00e9s. Voici les 4 \u00e9tapes du circuit frigorifique.<\/p>\n

Le compresseur<\/h2>\n

A son entr\u00e9e dans le compresseur, le fluide frigorig\u00e8ne est sous forme de vapeur. Sa pression est basse<\/strong>. A ce stade, il y a compression du liquide frigorig\u00e8ne, qui est \u00e0 l\u2019\u00e9tat vapeur, afin d\u2019augmenter sa temp\u00e9rature et sa pression. Cette op\u00e9ration permet d\u2019envoyer le fluide frigorig\u00e8ne \u00e0 travers le circuit de refroidissement. Le fluide sort du compresseur sous forme de vapeur \u00e0 haute pression.<\/strong><\/p>\n

Le condenseur<\/h2>\n

Le fluide frigorig\u00e8ne entre dans le condenseur \u00e0 l\u2019\u00e9tat vapeur et \u00e0 haute pression. A travers le condenseur, le fluide frigorig\u00e8ne (\u00e0 temp\u00e9rature \u00e9lev\u00e9e) perd de son \u00e9nergie thermique. En cons\u00e9quence, le fluide frigorig\u00e8ne se condense<\/strong> et prend une forme liquide.<\/p>\n

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A sa sortie du condenseur, le fluide frigorig\u00e8ne pr\u00e9sente un \u00e9tat liquide et \u00e0 haute pression.<\/p>\n

Avec une pompe \u00e0 chaleur, l\u2019\u00e9nergie qu\u2019on r\u00e9cup\u00e8re au niveau du condenseur est utilis\u00e9e pour la production de chaleur dans un b\u00e2timent (pour le chauffage ou l\u2019eau chaude). Dans le cas d\u2019un mat\u00e9riel frigorifique (chambre froide<\/a> \u00a0,r\u00e9frig\u00e9rateur,\u2026), cette \u00e9nergie est \u00e9vacu\u00e9e vers l\u2019ext\u00e9rieur.<\/p>\n

Le d\u00e9tendeur<\/h2>\n

Le fluide frigorig\u00e8ne passe par le d\u00e9tendeur \u00e0 l\u2019\u00e9tat liquide <\/strong>et \u00e0 haute pression.<\/strong><\/p>\n

Pendant que le fluide traverse le d\u00e9tendeur, sa pression et sa temp\u00e9rature diminuent. C\u2019est par le d\u00e9tendeur que l\u2019on peut r\u00e9guler la quantit\u00e9 de fluide circulant dans le syst\u00e8me frigorifique.<\/p>\n

Lors de sa sortie du d\u00e9tendeur, le fluide frigorig\u00e8ne est \u00e0 l\u2019\u00e9tat liquide<\/strong> et \u00e0 basse pression.<\/strong><\/p>\n

L\u2019\u00e9vaporateur<\/h2>\n

A son entr\u00e9e dans l\u2019\u00e9vaporateur, le liquide frigorig\u00e8ne est donc sous forme liquide<\/strong> et \u00e0 basse pression.
\nA son passage dans l\u2019\u00e9vaporateur, le fluide frigorig\u00e8ne (qui est \u00e0 basse temp\u00e9rature) emmagasine de la chaleur. Il y a alors \u00e9vaporation et le fluide passe \u00e0 l\u2019\u00e9tat de gaz.<\/p>\n

Quand il sort de l\u2019\u00e9vaporateur, le fluide frigorig\u00e8ne est \u00e0 l\u2019\u00e9tat vapeur<\/strong> et \u00e0 basse pression.<\/strong><\/p>\n

Pour une pompe \u00e0 chaleur, l\u2019\u00e9nergie thermique emmagasin\u00e9e est capt\u00e9e \u00e0 l\u2019ext\u00e9rieur des locaux (dans l\u2019eau, l\u2019air, le sol). Pour un r\u00e9frig\u00e9rateur, cette \u00e9nergie sera capt\u00e9e \u00e0 l\u2019int\u00e9rieur m\u00eame du r\u00e9frig\u00e9rateur.<\/p>\n

Les autres \u00e9l\u00e9ments du circuit frigorifique<\/h2>\n

\"\u00e9l\u00e9ment<\/a><\/p>\n

Il existe n\u00e9anmoins d\u2019autres composants qui assurent le fonctionnement du circuit de refroidissement<\/strong> dont:<\/p>\n

\u2013 le pressostat basse pression,
\n\u2013 le thermostat,
\n\u2013 le s\u00e9parateur d\u2019huile : pour diminuer la quantit\u00e9 d\u2019huile <\/strong>passant dans la machine,
\n\u2013 le r\u00e9servoir de liquide,
\n\u2013 les filtres d\u00e9shydrateurs: l\u2019humidit\u00e9 peut impacter la puissance du moteur,
\n\u2013 les manom\u00e8tres: pour le contr\u00f4le des pressions d\u2019aspiration et de refoulement,
\n\u2013 les vannes papillons: assurent l\u2019arr\u00eat de l\u2019appareil,
\n\u2013 les vannes d\u2019arr\u00eat de compression,
\n\u2013 un voyant dot\u00e9 d\u2019un indicateur d\u2019humidit\u00e9: plac\u00e9 avant le d\u00e9tendeur pour surveiller le d\u00e9bit du fluide afin d\u2019\u00e9viter une surchauffe du syst\u00e8me de refroidissement.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Le circuit frigorifique d\u2019une chambre froide professionnelle est compos\u00e9 d\u2019au moins quatre composants importants : un compresseur, un condenseur, un d\u00e9tendeur et un \u00e9vaporateur.\u2026<\/p>\n","protected":false},"author":9,"featured_media":4777,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4775","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chambre-froide"],"acf":[],"yoast_head":"\nComment fonctionne le circuit frigorifique? - iceshop.fr<\/title>\n<meta name=\"description\" content=\"Le Guide iceshop.fr : Comment fonctionne le circuit frigorifique?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.iceshop.fr\/guide\/comment-fonctionne-le-circuit-frigorifique\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment fonctionne le circuit frigorifique? 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