可以在哪些環境中使用中央(yang)空調電(dian)輔(fu)助(zhu)加熱器？中(zhong)央空(kong)(kong)調(diao)(diao)電輔(fu)助(zhu)加熱(re)(re)(re)器(qi)是(shi)(shi)以(yi)室外空(kong)(kong)氣(qi)為熱(re)(re)(re)源(yuan)，加熱(re)(re)(re)室內(nei)空(kong)(kong)氣(qi)的(de)熱(re)(re)(re)泵機(ji)組，如(ru)小型熱(re)(re)(re)泵式(shi)空(kong)(kong)調(diao)(diao)器(qi)（窗式(shi)、立柜式(shi)等）。這種小型熱(re)(re)(re)泵空(kong)(kong)調(diao)(diao)機(ji)組可以(yi)有不(bu)同的(de)組裝(zhuang)方法，適(shi)用(yong)(yong)于住宅(zhai)建筑(zhu)和一般小型公(gong)共、商(shang)業性設施。可以(yi)在哪些(xie)環(huan)境中(zhong)使用(yong)(yong)中(zhong)央空(kong)(kong)調(diao)(diao)電輔(fu)助(zhu)加熱(re)(re)(re)器(qi)？中(zhong)央空(kong)(kong)調(diao)(diao)電輔(fu)助(zhu)加熱(re)(re)(re)器(qi)的(de)優點是(shi)(shi)安裝(zhuang)方便，使用(yong)(yong)簡單，并可以(yi)冬夏兩用(yong)(yong)（通(tong)過四通(tong)換向閥(fa)使冷凝器(qi)和蒸發(fa)器(qi)相(xiang)互轉換）。其主(zhu)要(yao)缺點是(shi)(shi)室外空(kong)(kong)氣(qi)溫度(du)(du)越(yue)(yue)低時(shi)，室內(nei)熱(re)(re)(re)的(de)需(xu)求越(yue)(yue)大，而機(ji)組的(de)供熱(re)(re)(re)量反(fan)而減(jian)少，效(xiao)率越(yue)(yue)低。因此，使用(yong)(yong)中(zhong)央空(kong)(kong)調(diao)(diao)電輔(fu)助(zhu)加熱(re)(re)(re)器(qi)須地計算熱(re)(re)(re)負(fu)荷，并在此基礎上選(xuan)擇合適(shi)的(de)輔(fu)助(zhu)熱(re)(re)(re)源(yuan)加以(yi)配(pei)合。此外，當室外空(kong)(kong)氣(qi)溫度(du)(du)低于0 ℃ 時(shi)，在一定的(de)溫度(du)(du)下蒸發(fa)器(qi)上還(huan)會(hui)結霜，這將對傳熱(re)(re)(re)不(bu)利，必要(yao)時(shi)需(xu)采用(yong)(yong)除霜循環(huan)（實(shi)際是(shi)(shi)制冷循環(huan)）加以(yi)消(xiao)除。