{"id":2161,"date":"2022-10-14T21:45:52","date_gmt":"2022-10-14T13:45:52","guid":{"rendered":"https:\/\/dodomachine.com\/?p=2161"},"modified":"2026-01-08T14:03:35","modified_gmt":"2026-01-08T06:03:35","slug":"identifikasi-kesalahan-katup-pembalik-4-arah-dan-analisis-penyebab","status":"publish","type":"post","link":"https:\/\/www.dodomachine.com\/id\/4-way-reversing-valve-fault-identification-and-cause-analysis\/","title":{"rendered":"Identifikasi kesalahan Katup Pembalik 4 arah dan analisis penyebabnya"},"content":{"rendered":"
Satu. Struktur dan penggunaan katup empat arah<\/h2>\n\n\n\n
Katup empat arah terdiri dari tiga bagian:<\/p>\n\n\n\n
katup pilot<\/li>
katup utama<\/li>
kumparan solenoida<\/li><\/ul>\n\n\n\n
Kumparan solenoid dapat dilepas. Katup pilot dan katup utama dilas menjadi satu.<\/p>\n\n\n\n
Pengantar singkat tentang prinsip kerja katup empat arah:<\/p>\n\n\n\n
Ketika kumparan elektromagnetik dalam keadaan mati, seperti yang ditunjukkan pada gambar di bawah ini: katup geser pilot \u2461 bergerak ke kanan di bawah penggerak pegas kompresi \u2462, dan gas bertekanan tinggi memasuki tabung kapiler \u2460 dan kemudian memasuki rongga piston \u2464. Sebaliknya, gas di rongga piston \u2463 dibuang. Terdapat perbedaan tekanan, piston dan main slide valve \u2465 bergerak ke kanan, sehingga pipa E dan S terhubung, serta pipa D dan C terhubung, sehingga membentuk siklus refrigerasi seperti terlihat pada gambar.<\/p>\n\n\n\n<\/figure>\n\n\n\n
Ketika kumparan solenoid diberi energi, seperti yang ditunjukkan pada gambar di bawah, katup spul pilot \u2461 mengatasi tegangan pegas kompresi \u2462 dan bergerak ke kiri di bawah aksi gaya magnet yang dihasilkan oleh kumparan solenoid. Karena adanya perbedaan tekanan antara kedua ujung piston, maka piston dan katup geser utama \u2465 bergerak ke kiri, sehingga pipa S dan C terhubung, dan pipa D dan E terhubung, sehingga membentuk siklus pemanasan. .<\/p>\n\n\n\n
Identifikasi kesalahan pembalikan katup dua arah empat arah<\/h2>\n\n\n\n
1. Aliran perantara: Tidak sulit ditemukan dari struktur katup empat arah. Ketika katup geser utama berada di posisi tengah, seperti terlihat pada gambar di bawah, ketiga pipa E, S dan C dihubungkan satu sama lain, dan terdapat aliran perantara tertentu. Pada saat ini, kompresor bertekanan tinggi. Refrigeran di dalam tabung dapat mengalir langsung kembali ke tabung bertekanan rendah. Tujuan dari perancangan aliran perantara adalah ketika main spool valve berada pada posisi tengah dapat melepaskan tekanan dan mencegah kerusakan sistem AC akibat tekanan yang tinggi.<\/p>\n\n\n\n
2. Hubungan antara perbedaan tekanan dan laju aliran: Kondisi dasar pembalikan katup empat arah adalah perbedaan tekanan di kedua ujung piston (yaitu perbedaan tekanan antara pipa knalpot dan pipa hisap) (F1-F2) harus lebih besar dari tahanan gesek f, jika tidak, keempat katup tembus tidak akan berbalik arah. Perbedaan tekanan operasi minimum yang diperlukan untuk pembalikan dijamin oleh aliran sistem. Ketika perbedaan tekanan (F1-F2) antara ruang piston kiri dan kanan lebih besar dari hambatan gesekan f, katup empat arah mulai berubah arah. Ketika katup geser utama bergerak ke posisi tengah, pipa E, S, dan C dari katup empat arah dihubungkan satu sama lain, mengompresi Bagian dari refrigeran yang dikeluarkan dari kompresor akan mengalir langsung dari katup empat arah D melalui sambungan E dan C ke sambungan S (port pengembalian udara kompresor), membentuk keadaan aliran gas seketika.<\/p>\n\n\n\n<\/figure>\n\n\n\n
Pada saat ini, jika laju aliran refrigeran yang dikeluarkan oleh kompresor jauh lebih besar daripada kehilangan aliran antara katup empat arah, perbedaan tekanan tinggi dan rendah tidak akan berkurang banyak, dan katup empat arah memiliki pembalikan yang cukup besar. perbedaan tekanan untuk membuat katup spool utama berada di tempatnya; jika kompresor keluar Ketika aliran refrigeran dari katup empat arah tidak mencukupi, perbedaan tekanan tinggi dan rendah akan sangat berkurang karena hilangnya aliran perantara dari katup empat arah. Di posisi tengah, terbentuk untaian gas.<\/p>\n\n\n\n
Tiga. Kemungkinan penyebab aliran zat pendingin tidak mencukupi<\/h2>\n\n\n\n
Kebocoran eksternal terjadi pada sistem AC, mengakibatkan sirkulasi zat pendingin dalam sistem tidak mencukupi;<\/li>
Saat cuaca sangat dingin, penguapan zat pendingin tidak cukup;<\/li>
Katup empat arah tidak cocok dengan sistem, dan katup empat arah yang dipilih memiliki aliran perantara yang besar dan kapasitas sistem yang kecil;<\/li>
Waktu pembalikan AC. Umumnya sistem dirancang sedemikian rupa sehingga katup empat arah tidak berubah arah hingga kompresor dihentikan dalam jangka waktu tertentu. Pada saat ini, tekanan tinggi dan rendah cenderung seimbang, dan pembalikan berhenti di posisi tengah, yaitu katup empat arah tidak terbalik pada tempatnya, dan katup spool utama berhenti di posisi tengah. Pada permulaan berikutnya, aliran tidak mencukupi karena pengaruh aliran perantara;<\/li>
Ketika kompresor menyala, alirannya tidak mencukupi, dan inverter lebih jelas.<\/li><\/ol>\n\n\n\n<\/figure>\n\n\n\n
Keempat, kemungkinan alasan pergantian katup empat arah yang buruk<\/h2>\n\n\n\n
1. Kumparan terputus atau tegangan tidak memenuhi peraturan koil, menyebabkan spul katup pilot rusak;<\/p>\n\n\n\n
2. Karena alasan eksternal, bagian katup pilot berubah bentuk, menyebabkan inti katup tidak dapat bergerak;<\/p>\n\n\n\n
3. Karena alasan eksternal, tabung kapiler katup pilot berubah bentuk, aliran tidak mencukupi, dan perbedaan tekanan yang diperlukan untuk pembalikan tidak dapat dibentuk dan tidak dapat digerakkan;<\/p>\n\n\n\n
4. Karena alasan eksternal, badan katup utama berubah bentuk, dan bagian piston macet dan tidak dapat bergerak;<\/p>\n\n\n\n
5. Kotoran dalam sistem memasuki katup empat arah dan menyumbat piston atau katup spool utama dan tidak dapat bergerak;<\/p>\n\n\n\n
6. Ketika pipa dibrazing, suhu badan katup utama melebihi 120\u00b0C, dan bagian dalamnya berubah bentuk secara termal dan tidak dapat bergerak;<\/p>\n\n\n\n
7. Terdapat kebocoran refrigeran eksternal dalam sistem AC, jumlah sirkulasi refrigeran tidak mencukupi, dan perbedaan tekanan yang diperlukan untuk pergantian tidak dapat ditentukan dan tidak dapat dioperasikan;<\/p>\n\n\n\n
8. Volume sirkulasi zat pendingin kompresor tidak dapat memenuhi aliran yang diperlukan dari katup pembalikan empat arah;<\/p>\n\n\n\n
9. Ketika frekuensi kecepatan kompresor inverter rendah, aliran yang diperlukan untuk pergantian tidak dapat dijamin;<\/p>\n\n\n\n
10. Kompresor gulir menyebabkan kejutan hidrolik pada sistem, menyebabkan piston katup empat arah rusak dan tidak dapat beroperasi.<\/p>\n\n\n\n
Penilaian gas rangkaian katup lima arah empat arah<\/h2>\n\n\n\n
Cara membedakan aliran gas: sentuh tiga pipa bawah katup empat arah dengan tangan, jika semuanya panas berarti katup empat arah tidak pada tempatnya, dan berada di aliran gas tengah. negara. Sepotong kecil magnet juga bisa digunakan. Jika arahnya dibalik, magnet kecil tidak ikut bergerak, yang berarti gas juga terperangkap. Sejumlah zat pendingin dimasukkan ke dalam sistem, dan arahnya dapat dibalik.<\/p>\n\n\n\n
Ada banyak faktor yang menyebabkan katup empat arah tidak berubah arah. Selama pemeliharaan, sering kali diwujudkan sebagai tidak ada pendinginan atau tidak ada pemanasan. Cara eliminasinya adalah sebagai berikut:<\/p>\n\n\n\n
(1) Pertama-tama periksa apakah zat pendingin dalam sistem mencukupi (tidaklah menyeluruh untuk menilai apakah tekanan sistem mencukupi);<\/p>\n\n\n\n
(2) Periksa sistem apakah ada kehilangan zat pendingin yang disebabkan oleh kebocoran eksternal;<\/p>\n\n\n\n
(3) Periksa apakah badan katup empat arah dan tabung kapiler rusak atau berubah bentuk;<\/p>\n\n\n\n
(4) Menilai apakah kumparan dihidupkan dan dimatikan normal, dan apakah tegangan berada dalam kisaran penggunaan yang diperbolehkan;<\/p>\n\n\n\n
(5) Dilihat aktif atau tidaknya pilot valve, terdapat bunyi spool slamming \u201ctower, tower, tower\u201d saat kumparan dihidupkan atau dimatikan, menandakan pilot valve beroperasi normal. Pada saat ini, yang terbaik adalah memberi energi hanya pada katup empat arah untuk mendengarkan suaranya.<\/p>\n\n\n\n
(6) Katup pilot berfungsi normal dan badan katup utama tidak berfungsi, yang menunjukkan bahwa perbedaan tekanan pengoperasian minimum yang diperlukan untuk pembalikan katup empat arah belum ditetapkan. Refrigeran yang cukup dapat diisikan ke dalam sistem agar dapat berputar secara normal.<\/p>\n\n\n\n
If you need to know more about the manufacture of 4-way reversing valve, please visit the page 4-way Reversing Valve Machine<\/p>","protected":false},"excerpt":{"rendered":"
One. Structure and use of four-way valve The four-way valve consists of three parts: pilot valve main valve solenoid coil The solenoid coil can be removed. The pilot valve and the main valve are welded together. A brief introduction to the working principle of the four-way valve: When the electromagnetic coil is in a power-off […]<\/p>\n","protected":false},"author":1,"featured_media":1935,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hvac-knowledge"],"yoast_head":"\n
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