空調器(qi)通電后(hou),由室(shi)(shi)內機(ji)(ji)(ji)(ji)(ji)(ji)向室(shi)(shi)外(wai)機(ji)(ji)(ji)(ji)(ji)(ji)發(fa)(fa)送(song)信(xin)(xin)(xin)號(hao)或由室(shi)(shi)外(wai)機(ji)(ji)(ji)(ji)(ji)(ji)向室(shi)(shi)內機(ji)(ji)(ji)(ji)(ji)(ji)發(fa)(fa)送(song)信(xin)(xin)(xin)號(hao),均在收(shou)到(dao)對方信(xin)(xin)(xin)號(hao)并處理完50ms后(hou)進行(xing)。通信(xin)(xin)(xin)以室(shi)(shi)內機(ji)(ji)(ji)(ji)(ji)(ji)為主,正常情(qing)況(kuang)室(shi)(shi)內機(ji)(ji)(ji)(ji)(ji)(ji)發(fa)(fa)送(song)信(xin)(xin)(xin)號(hao)之后(hou)等待接(jie)收(shou),如500ms仍未接(jie)收(shou)到(dao)反饋(kui)信(xin)(xin)(xin)號(hao),則再(zai)次(ci)發(fa)(fa)送(song)當前的(de)命令(ling),如果(guo)2min內仍未收(shou)到(dao)室(shi)(shi)外(wai)機(ji)(ji)(ji)(ji)(ji)(ji)的(de)應答(da)(或應答(da)錯誤),則出錯報警,同時發(fa)(fa)送(song)信(xin)(xin)(xin)號(hao)命令(ling)給(gei)室(shi)(shi)外(wai)機(ji)(ji)(ji)(ji)(ji)(ji)。以室(shi)(shi)外(wai)機(ji)(ji)(ji)(ji)(ji)(ji)為副(fu)機(ji)(ji)(ji)(ji)(ji)(ji),室(shi)(shi)外(wai)機(ji)(ji)(ji)(ji)(ji)(ji)未接(jie)收(shou)到(dao)室(shi)(shi)內機(ji)(ji)(ji)(ji)(ji)(ji)的(de)信(xin)(xin)(xin)號(hao)時,則一直(zhi)等待,不發(fa)(fa)送(song)信(xin)(xin)(xin)號(hao)

　　下(xia)圖(tu)為(wei)通信(xin)電路簡圖(tu),其中,RC1為(wei)室內機(ji)發送光(guang)耦(ou)(ou)、RC2為(wei)室內機(ji)接收(shou)光(guang)耦(ou)(ou),PC1為(wei)室外機(ji)發送光(guang)耦(ou)(ou)、PC2為(wei)室外機(ji)接收(shou)光(guang)耦(ou)(ou)。

　　空(kong)調(diao)器通(tong)(tong)(tong)電后(hou),室(shi)(shi)內(nei)(nei)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)和室(shi)(shi)外機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)主板(ban)就會自動進行(xing)通(tong)(tong)(tong)信(xin)(xin),按照既定的(de)通(tong)(tong)(tong)信(xin)(xin)規則(ze),用脈(mo)沖(chong)序列的(de)形式將各(ge)自的(de)電路(lu)狀(zhuang)況發送給對(dui)方(fang),收(shou)到(dao)(dao)(dao)對(dui)方(fang)正常的(de)信(xin)(xin)號后(hou),室(shi)(shi)內(nei)(nei)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)和室(shi)(shi)外機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)電路(lu)均處于待機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)狀(zhuang)態。當進行(xing)開機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)操作時,室(shi)(shi)內(nei)(nei)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)CPU把(ba)預(yu)置的(de)各(ge)項工作參(can)(can)數及(ji)開機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)指令送到(dao)(dao)(dao)RC1的(de)輸(shu)入端(duan)(duan)(duan),通(tong)(tong)(tong)過(guo)通(tong)(tong)(tong)信(xin)(xin)回路(lu)進行(xing)傳輸(shu);室(shi)(shi)外機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)PC2輸(shu)入端(duan)(duan)(duan)收(shou)到(dao)(dao)(dao)開機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)指令及(ji)工作參(can)(can)數內(nei)(nei)容后(hou),由(you)輸(shu)出端(duan)(duan)(duan)將序列脈(mo)沖(chong)信(xin)(xin)號送給室(shi)(shi)外機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)CPU,整(zheng)(zheng)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)開機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji),按照預(yu)定的(de)參(can)(can)數運行(xing)。室(shi)(shi)外機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)CPU在接收(shou)到(dao)(dao)(dao)信(xin)(xin)號50ms后(hou)輸(shu)出反饋信(xin)(xin)號到(dao)(dao)(dao)PC1的(de)輸(shu)入端(duan)(duan)(duan),通(tong)(tong)(tong)過(guo)通(tong)(tong)(tong)信(xin)(xin)回路(lu)傳輸(shu)到(dao)(dao)(dao)室(shi)(shi)內(nei)(nei)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)RC2輸(shu)入端(duan)(duan)(duan),RC2輸(shu)出端(duan)(duan)(duan)將室(shi)(shi)外機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)傳來的(de)各(ge)項運行(xing)狀(zhuang)況參(can)(can)數送至室(shi)(shi)內(nei)(nei)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)CPU,根據收(shou)集(ji)到(dao)(dao)(dao)的(de)整(zheng)(zheng)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)運行(xing)狀(zhuang)況參(can)(can)數確定下一步對(dui)整(zheng)(zheng)機(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)(ji)的(de)控(kong)制(zhi)。

　　由于(yu)(yu)室內機和室外機之間相(xiang)互傳遞的通信(xin)(xin)(xin)(xin)(xin)信(xin)(xin)(xin)(xin)(xin)息(xi)產生于(yu)(yu)各自的cPU,其(qi)信(xin)(xin)(xin)(xin)(xin)號幅度小于(yu)(yu)5V。而室內機與(yu)室外機的距離比較(jiao)遠,如果直接用(yong)(yong)(yong)(yong)此信(xin)(xin)(xin)(xin)(xin)號進行室內機和室外機的信(xin)(xin)(xin)(xin)(xin)號傳輸(shu),很(hen)難(nan)保證信(xin)(xin)(xin)(xin)(xin)號傳輸(shu)的可靠度。因此,在變頻空(kong)調器中,通信(xin)(xin)(xin)(xin)(xin)回路一(yi)般都采(cai)用(yong)(yong)(yong)(yong)單獨的電(dian)源供(gong)電(dian),供(gong)電(dian)電(dian)壓多數使(shi)用(yong)(yong)(yong)(yong)直流24V,通信(xin)(xin)(xin)(xin)(xin)回路采(cai)用(yong)(yong)(yong)(yong)光耦傳送信(xin)(xin)(xin)(xin)(xin)號,通信(xin)(xin)(xin)(xin)(xin)回路與(yu)室內機和室外機主板上的電(dian)源完全分(fen)開,形成獨立(li)的回路。

      本(ben)文來自(zi)：中國(guo)空調制冷網(wang)