以下，基於顯示本發明之實施方式之圖式具體地說明本發明。 (實施方式1) 圖1係顯示實施方式1之吹風機之側視圖；圖2係實施方式1之吹風機之立體圖。吹風機為在筒狀之殼體1上安裝有手柄2之構成。殼體1之一端為吸氣口11，另一端為排氣口12，殼體1之內部為通風路徑。在吸氣口11安裝有網板狀之吸氣口蓋。穿過吸氣口蓋之空氣自吸氣口11被吸入至殼體1內。此外，吸氣口11可設置於殼體1之側面。在手柄2設置有用於使用者使吹風機動作而操作之操作部21。又，在手柄2連結有未圖示之電源線。吹風機經由電源線而自外部被供給電力。又，吹風機具備以覆蓋使用者之頭部之一部分之方式使用之罩體3。罩體3相對於殼體1可固著脫離。 圖3係將罩體3自殼體1分離後之狀態之吹風機之側視圖。圖4係將罩體3自殼體1分離後之狀態之吹風機之立體圖。罩體3為大致筒狀，並構成通風路徑。通風路徑之一端在罩體3安裝於殼體1之際成為連結於排氣口12之連結口32。通風路徑之另一端成為較排氣口12大之開口部31。在罩體3安裝於殼體1之狀態下，自排氣口12放出之空氣穿過罩體3內之通風路徑而自開口部31放出。 圖5係顯示實施方式1之吹風機之使用形態例之模式圖。使用者以如下之方式保持吹風機：使開口部31與使用者之頭部對向，並以罩體3覆蓋頭部之一部分。此時，開口部31接觸或接近使用者之頭部。自排氣口12放出之空氣吹拂至使用者頭部之由被罩體3覆蓋之部分。罩體3在通風路徑內具備用於刺激使用者之頭部之頭部刺激體33。如圖4所示，頭部刺激體33形成為模仿人之手的形狀。頭部刺激體33具有複數根模仿手指之棒狀體331。複數根棒狀體331配置為前端通過開口部31而朝向罩體3之外側。如圖5所示，在使用吹風機時，頭部刺激體33與使用者之頭部接觸。尤其的是，各棒狀體331撥開頭髮而使前端與頭皮接觸，從而刺激頭皮。如此，頭部刺激體33能夠刺激使用者之頭部。 又，罩體3在頭部刺激體33連結於罩體3之本體之部分具備彈性部件。即便在頭部刺激體33被所需程度以上之強勁之力按壓至使用者之頭部時，按壓之力會被彈性部件吸收，而對頭部施加適度的刺激。 圖6係顯示實施方式1之吹風機之內部構造之側視剖面圖。在殼體1之內部配置有朝殼體1之筒長方向送風之送風機14。圖6顯示以送風機14為軸流風扇之例。藉由送風機14動作，自吸氣口11吸入外部之空氣，並以殼體1之內部作為通風路徑而產生氣流，且氣流自排氣口12被放出。在送風機14與排氣口12之間配置有加溫空氣之加熱器15。例如，加熱器15形成為在配置於殼體1內之支持板上捲繞電熱線之構成。加熱器15加溫殼體1內之空氣，而使自排氣口12放出之氣流成為溫風。 吹風機具備使空氣離子(帶電粒子)在空氣中產生之離子產生單元(帶電粒子產生部)16。離子產生單元16配置於殼體1內。離子產生單元16具備：針狀之放電電極、及包圍放電電極之周圍之圓環狀感應電極。在放電電極與介電電極之間施加電壓而發生電暈放電，藉由電暈放電而在放電電極之周圍產生空氣離子。離子產生單元16為了產生H+
(H2
O)m
等之正的空氣離子與O2 -
(H2
O)n
等之負的空氣離子此二者，而具有2組放電電極與介電電極。離子產生單元16使正及負的空氣離子在殼體1內之空氣中產生。離子產生單元16所產生之空氣離子混入殼體1內之空氣中，且含有空氣離子之氣流自排氣口12被放出。 吹風機具備控制各部分之動作之控制部17。控制部17連接於操作部21、送風機14、加熱器15及離子產生單元16。控制部17根據操作部21所受理之來自使用者之操作而控制送風機14、加熱器15及離子產生單元16之動作。加熱器15及控制部17對應於加溫部。 再者，吹風機具備在罩體3安裝於殼體1之情形下被按下之按下開關13。如圖4及圖6所示，按下開關13配置於與安裝於殼體1之罩體3為對向之位置。按下開關13在罩體3安裝於殼體1之情形下為被按下之狀態，在罩體3未被安裝之情形下為未被按下之狀態。按下開關13連接於控制部17。控制部17在按下開關13被按下時禁止加熱器15之動作。且，控制部17在按下開關13未被按下時可使加熱器15動作。如此，吹風機在罩體3安裝於殼體1之狀態下，將不會以加熱器15加溫空氣。 在圖5所示之狀態下，當使用者操作操作部21時，控制部17使送風機14及離子產生單元16動作。含有空氣離子之空氣自排氣口12被放出，並穿過罩體3內之通風路徑，而吹至使用者之頭部。被放出之空氣並不立刻散逸而以某一程度之時間滯留於覆蓋使用者之頭部之一部分之罩體3的內部。因此，空氣中所含有之空氣離子並不散逸而是滯留於罩體3之內部，並集中於使用者頭部之被罩體3覆蓋之部分而作用。藉由空氣離子集中並作用，而較先前為更高密度之空氣離子作用於被罩體3覆蓋之部分所包含之頭髮及頭皮。藉由空氣離子滯留於罩體3之內部，而空氣離子作用於頭髮及頭皮之時間較先前變長。又，由於在頭部刺激體33之複數根棒狀體331撥開頭髮之狀態下含有空氣離子之空氣吹至頭部，故空氣離子有效地與頭髮及頭皮接觸，而空氣離子高效地作用於頭髮及頭皮。因此，提高對頭髮及頭皮進行除電、除菌及保濕等之改善頭髮及頭皮之環境之效果。且，藉由使用者之頭皮一面受到頭部刺激體33刺激且空氣離子發生作用，而更加期待改善頭皮之環境之效果的提高。 又，由於在罩體3安裝於殼體1之狀態下，加熱器15不加溫空氣，故不存在經加溫之空氣自排氣口12被放出之情形。在空氣被加溫之情形下，由於經加溫之空氣持續地集中吹至使用者之頭部之一部分，而散熱亦屬困難，故有使用者被灼傷之虞。在本實施方式中，由於在罩體3安裝於殼體1之狀態下空氣不會被加溫，故由未被加溫之空氣吹至使用者之頭部，而使用者被灼傷之可能性為低。 又，控制部17使用未圖示之溫度感測器來測定穿過殼體1內之通風路徑之空氣的溫度，並相應於溫度之測定結果來控制加熱器15之動作以使空氣之溫度不會成為特定之溫度以上。例如，控制部17利用PID(Proportional-Integral-Differential：比例積分微分)控制來調整空氣之溫度。在按下開關13因損傷等之原因未正常地動作之情形下，即便在罩體3已安裝於殼體1之狀態下空氣亦會被加溫，而有使用者被灼傷之虞。在本實施方式中，藉由調整空氣之溫度使其不會成為特定之溫度以上，而即便在按下開關13未正常地動作之情形下，亦可抑制灼傷之發生。 再者，吹風機具備相對於殼體1可固著脫離之噴嘴4。圖7係噴嘴4已安裝於殼體1之狀態之吹風機的側視圖；圖8係將噴嘴4自殼體1分離後之狀態之吹風機的立體圖。噴嘴4與罩體3更換而安裝於殼體1。噴嘴4以與排氣口12連結之方式安裝於殼體1，而將自排氣口12所放出之空氣縮窄化而放出。又，噴嘴4形成為在安裝於殼體1之情形下不會將按下開關13按下之形狀。因而，在噴嘴4安裝於殼體1之狀態下，控制部17使加熱器15動作，加熱器15將空氣加溫，且經加溫之空氣穿過噴嘴4而被放出。使用者能夠與先前之吹風機相同地，利用經加溫之空氣進行吹乾之操作。 (實施方式2) 圖9係實施方式2之吹風機之側視圖。圖10係顯示出罩體31之內部的實施方式2之吹風機的示意性側視圖。圖10中顯示出罩體3之內部，罩體3之外形以虛線表示。吹風機之除罩體3以外之構成係與實施方式1相同。罩體3具有開口部31，且進一步在通風路徑內具備碗狀體34。碗狀體34形成為一面為凹面、另一面為凸面之碗狀。凹面之曲率係與人類之頭部為相同之程度。碗狀體34配置為通過開口部31且凹面朝向罩體3之外側。碗狀體34介以安裝部件35而被安裝於罩體3之本體。圖11係碗狀體34之示意性剖視圖。在碗狀體34形成有複數個孔341。且，在碗狀體34之凹面設置有複數個突起342。 使用者係與實施方式1相同地以如下之方式保持吹風機：使開口部31與使用者之頭部對向，並以罩體3覆蓋頭部之一部分。此時，開口部31接觸或接近使用者之頭部，且碗狀體34使凹面與使用者之頭部對向來覆蓋頭部之一部分。碗狀體34之凹面接觸或接近使用者之頭部，且突起342撥開頭髮而與頭皮接觸，從而刺激頭皮。安裝部件35具有吸收將碗狀體34朝頭部按壓之力之機能。即便在碗狀體34被所需程度以上之強勁之力按壓至使用者之頭部時，按壓之力會被安裝部件35吸收，而對頭部施加適度的刺激。 在使用者使吹風機動作時，含有空氣離子之空氣自排氣口12被放出，並不散逸而是滯留於罩體3之內部。含有空氣離子之空氣會穿過孔341而與使用者之頭部接觸。因此，空氣離子集中於使用者之頭部之被碗狀體34覆蓋之部分而作用。較先前為更高密度之空氣離子作用於頭髮及頭皮，且空氣離子作用於頭髮及頭皮之時間較先前變長。又，由於含有空氣離子之空氣係在突起342撥開頭髮之狀態下吹至頭部，故空氣離子有效地與頭髮及頭皮接觸，而空氣離子高效地作用於頭髮及頭皮。因而，在本實施方式中亦然，提高利用空氣離子改善頭髮及頭皮之環境之效果。且，藉由使用者之頭皮一面受到突起342刺激且空氣離子發生作用，而更能期待改善頭皮之環境之效果的提高。 (實施方式3) 實施方式3之吹風機之構成係與實施方式1或2相同。在本實施方式中，控制部17在使加熱器15動作而加溫空氣之際，可切換於將空氣之溫度保持在比較低溫之特定之溫度範圍內之第1模式與將空氣之溫度加溫至更高溫之第2模式。在第1模式下，控制部17使用未圖示之溫度感測器來測定穿過殼體1內之通風路徑之空氣的溫度，並相應於溫度之測定結果來控制加熱器15之動作以將空氣之溫度保持在特定之溫度範圍內。在第2模式下，控制部17相應於溫度之測定結果來控制加熱器15之動作以將空氣加溫至較第1模式下之溫度範圍為更高溫為止。使用者可對操作部21進行操作，而指示第1模式與第2模式之相互之切換。控制部17相應於操作部21之操作而切換於第1模式與第2模式，並使加熱器15在第1或第2模式下動作。 在本實施方式中亦然，吹風機具備在罩體3安裝於殼體1之情形下被按下之按下開關13。按下開關13在罩體3安裝於殼體1之情形下為被按下之狀態，在罩體3未被安裝之情形下為未被按下之狀態。按下開關13連接於控制部17。在本實施方式中，控制部17在按下開關13被按下時禁止使加熱器15以第2模式動作。且，控制部17在按下開關13未被按下時可使加熱器15以第2模式動作。如此，控制部17及加熱器15在罩體3安裝於殼體1之狀態下，將不以第2模式下動作，而是以第1模式加溫空氣。 在本實施方式中亦然，吹風機係與實施方式1及2相同般使用。自排氣口12被放出之空氣中所含有之空氣離子並不散逸而是滯留於覆蓋使用者之頭部之一部分之罩體3的內部，且集中於使用者之頭部之被罩體3覆蓋之部分而作用。因而，與實施方式1及2相同地，利用空氣離子改善頭髮及頭皮之環境之效果提高。又，在本實施方式中，在罩體3安裝於殼體1之狀態下，控制部17及加熱器15不以第2模式動作，而以第1模式加溫空氣。藉由溫度保持在比較低溫之特定之溫度範圍內之空氣吹至使用者之頭部，而使用者被灼傷之可能性為低。 又，在本實施方式中亦然，控制部17使用溫度感測器來控制加熱器15之動作以使空氣之溫度不會成為特定之溫度以上。因而，吹風機即便在按下開關13未正常地動作之情形下，亦可抑制灼傷之發生。 此外，雖然在以上之實施方式1～3中顯示了在罩體3安裝於殼體1之情形下控制部17限制加熱器15之動作之形態，但吹風機亦可具備在按下開關13被按下時機械性地關斷用於使加熱器15動作之電路的機構。又，雖然在實施方式1～3中顯示了使用按下開關13來檢測罩體3安裝於殼體1之情形的形態，但亦可為吹風機以其他之方法檢測罩體3安裝於殼體1之情形的形態。例如，吹風機使用接觸開關等之按下開關以外之開關來檢測罩體3安裝於殼體1之情形。又，例如，罩體3具有在安裝於殼體1之情形下連接於控制部17之電路，控制部17藉由檢測到電路已連接而檢測出罩體3已安裝於殼體1。在檢測出罩體3已安裝於殼體1之情形下，控制部17禁止空氣之加溫或禁止以第2模式動作。 又，雖然在實施方式1～3中顯示了帶電粒子產生部為離子產生單元16之形態，但亦可為吹風機具備使空氣離子以外之帶電粒子在空氣中產生之帶電粒子產生部的形態。例如，吹風機可具備生成帶電水並將其放出至空氣中之帶電粒子產生部。在帶電粒子產生部產生空氣離子以外之帶電粒子之形態下亦然，利用帶電粒子之作用可獲得改善頭髮及頭皮之環境之效果。又，吹風機亦可為不具備加熱器15之形態。 如上述般，本發明之吹風機具備：殼體(1)，其具有吸氣口(11)及排氣口(12)；及帶電粒子產生部(16)，其使帶電粒子在空氣中產生；該吹風機使含有帶電粒子之空氣自前述排氣口(12)放出；其特徵在於具備罩體(3)，該罩體具有開口部(31)，並使前述開口部(31)與使用者之頭部對向而用於覆蓋前述頭部之一部分；且該罩體(3)連結於前述排氣口(12)而構成以前述開口部(31)為終端之通風路徑。 在本發明中，吹風機具備帶電粒子產生部(16)。且，吹風機具備連結於殼體(1)之排氣口(12)並用於覆蓋使用者之頭部之罩體(3)。吹風機係以使罩體(3)之開口部(31)與使用者之頭部對向之方式使用。含有帶電粒子之空氣自殼體(1)之排氣口(12)被放出，被放出之空氣滯留於罩體(3)內。空氣中所含有之帶電粒子集中於使用者之頭部之被罩體(3)覆蓋之部分而作用。 本發明之吹風機之特徵在於：進一步具備加溫空氣之加溫部(15、17)；且前述罩體(3)相對於前述殼體(1)可固著脫離；前述加溫部(15、17)在前述罩體(3)安裝於前述殼體(1)之狀態下將不會加溫空氣。 在本發明中，罩體(3)相對於殼體(1)可固著脫離，吹風機在罩體(3)安裝於殼體(1)之狀態下不加溫空氣。在將罩體(3)安裝於殼體(1)而使用吹風機之情形下，雖然空氣集中吹至使用者之頭部之一部分，但空氣未被加溫，而使用者被灼傷之可能性為低。 本發明之吹風機之特徵在於：進一步具備在前述罩體(3)安裝於前述殼體(1) 之情形下被按下之開關(13) ；且前述加溫部(15、17)在前述開關(13)被按下時不加溫空氣，在前述開關(13)未被按下時可進行空氣之加溫。 在本發明中，吹風機具備在罩體(3)安裝於殼體(1)之情形下被按下之開關(13)。在開關(13)被按下時吹風機不進行空氣之加溫。因此，在罩體(3)安裝於殼體(1)之狀態下空氣不會被加溫。 本發明之吹風機之特徵在於：進一步具備加溫空氣之加溫部(15、17)；且前述罩體(3)相對於前述殼體(1)可固著脫離；前述加溫部(15、17)可切換於為了將空氣之溫度保持在特定之溫度範圍內而加溫空氣之第1模式與將空氣之溫度加溫至較前述特定之溫度範圍為高溫之第2模式，且在前述罩體(3)安裝於前述殼體(1)之狀態下將不會以前述第2模式動作。 在本發明中，吹風機切換於以將溫度保持在比較低溫之特定範圍內之方式而加溫空氣之第1模式與將空氣加溫至更高溫之第2模式，而對空氣進行加溫。罩體(3)相對於殼體(1)可固著脫離，吹風機在罩體(3)安裝於殼體(1)之狀態下、不以第2模式加溫空氣。在罩體(3)安裝於殼體(1)而使用吹風機之情形下，吹風機以第1模式下加溫空氣，空氣之溫度保持為低溫，而使用者被灼傷之可能性為低。 本發明之吹風機之特徵在於：進一步具備在前述罩體(3)安裝於前述殼體(1)時被按下之開關(13) ；且前述加溫部(15、17)在前述開關(13)被按下時不以前述第2模式動作，在前述開關(13)未被按下時可以前述第2模式動作。 在本發明中，吹風機具備在罩體(3)安裝於殼體(1)時被按下之開關(13)。在開關(13)被按下時，吹風機不以第2模式加溫空氣。因此，在罩體(3)安裝於殼體(1)時，不以第2模式加溫空氣。 本發明之吹風機之特徵在於：進一步具備：噴嘴(4)，其在前述罩體(3)自前述殼體(1)脫離後之狀態下可以連結於前述排氣口(12)之方式安裝於前述殼體(1)；且前述噴嘴(4)形成為在安裝於前述殼體(1)之狀態下不會將前述開關(13)按下之形狀。 在本發明中，吹風機具備可與罩體(3)更換而安裝於殼體(1)之噴嘴(4)。噴嘴(4)形成為不會按下開關(13)。因此，在噴嘴(4)安裝於殼體(1)之狀態下，吹風機能夠放出被加溫至高溫之空氣。 本發明之吹風機之特徵在於：前述加溫部(15、17)不會使空氣之溫度成為特定之溫度以上。 在本發明中，吹風機不會使空氣之溫度成為特定之溫度以上。因此，吹風機即便在開關(13)未正常地動作之情形下，亦不會使空氣之溫度過度上升。 本發明之吹風機之特徵在於：前述罩體(3)之一部分與使用者之頭部接觸並在通風路徑內具備用於刺激前述頭部之頭部刺激體(33) ；且前述頭部刺激體(33)具有用於以前端與前述頭部接觸之複數根棒狀體。 在本發明中，於罩體(3)設置有刺激使用者之頭部之頭部刺激體(33)。頭部刺激體(33)具有複數根棒狀體(331)。在吹風機之使用時，棒狀體(331)一面將頭髮撥開而刺激頭皮，且空氣中所含有之帶電粒子一面將作用於頭髮及頭皮。 本發明之吹風機之特徵在於：前述罩體(3)在通風路徑內具備：碗狀體(34)，其具有凹面且以該凹面與使用者之頭部對向之方式來覆蓋前述頭部；且前述碗狀體(34)形成有使空氣穿過之複數個孔(341)，並在前述凹面設置有用於與前述頭部接觸之複數個突起(342)。 在本發明中，在罩體(3)內設置有碗狀體(34)。在碗狀體(34)上形成有複數個孔(341)，且在凹面設置有複數個突起(342)。在吹風機之使用時，碗狀體(34)使凹面與使用者之頭部對向來覆蓋頭部之一部分。突起(342)一面撥開頭髮而刺激頭皮，且空氣中所含有之帶電粒子一面作用於頭髮及頭皮。Hereinafter, the present invention will be specifically described based on the drawings showing embodiments of the present invention. (Embodiment 1) FIG. 1 is a side view showing a hair dryer according to Embodiment 1, and FIG. 2 is a perspective view of a hair dryer according to Embodiment 1. The hair dryer has a configuration in which a handle 2 is attached to a cylindrical casing 1. One end of the housing 1 is an air inlet 11 and the other end is an air outlet 12, and the inside of the housing 1 is a ventilation path. A mesh-shaped suction port cover is attached to the suction port 11. The air passing through the suction port cover is sucked into the casing 1 from the suction port 11. Further, the suction port 11 may be provided on the side of the casing 1. The handle 2 is provided with an operation unit 21 for the user to operate the blower. Further, a power cord (not shown) is connected to the handle 2. The blower is supplied with electric power from the outside via a power line. Further, the hair dryer has a cover 3 that is used to cover a part of the head of the user. The cover 3 can be fixedly detached from the housing 1. Fig. 3 is a side view of the hair dryer in a state in which the cover 3 is separated from the casing 1. Fig. 4 is a perspective view of the hair dryer in a state in which the cover 3 is separated from the casing 1. The cover 3 has a substantially cylindrical shape and constitutes a ventilation path. One end of the ventilation path is a connection port 32 that is connected to the exhaust port 12 when the cover 3 is attached to the casing 1. The other end of the ventilation path is an opening portion 31 that is larger than the exhaust port 12. In a state where the cover 3 is attached to the casing 1, the air discharged from the exhaust port 12 is discharged from the opening 31 through the ventilation path in the cover 3. Fig. 5 is a schematic view showing an example of the use of the hair dryer of the first embodiment. The user holds the hair dryer in such a manner that the opening portion 31 faces the head of the user and covers one portion of the head with the cover 3. At this time, the opening portion 31 contacts or approaches the head of the user. The air discharged from the exhaust port 12 is blown to the portion of the user's head covered by the cover 3. The cover 3 is provided with a head stimulating body 33 for stimulating the head of the user in the ventilation path. As shown in FIG. 4, the head stimulator 33 is formed to mimic the shape of a human hand. The head stimulator 33 has a plurality of rods 331 that mimic the fingers. The plurality of rods 331 are disposed such that the front end faces the outer side of the cover 3 through the opening 31. As shown in Fig. 5, when the hair dryer is used, the head stimulating body 33 comes into contact with the head of the user. In particular, each of the rods 331 opens the hair to bring the front end into contact with the scalp, thereby stimulating the scalp. As such, the head stimulator 33 can stimulate the head of the user. Further, the cover 3 is provided with an elastic member at a portion where the head stimulator 33 is coupled to the body of the cover 3. Even when the head stimulating body 33 is pressed against the user's head by a strong force of a desired degree or more, the pressing force is absorbed by the elastic member, and a moderate stimulus is applied to the head. Fig. 6 is a side sectional view showing the internal structure of the hair dryer of the first embodiment. A blower 14 that blows air toward the longitudinal direction of the casing 1 is disposed inside the casing 1. Fig. 6 shows an example in which the blower 14 is an axial fan. By the operation of the blower 14, the outside air is taken in from the air intake port 11, and the airflow is generated by using the inside of the casing 1 as a ventilation path, and the airflow is discharged from the exhaust port 12. A heater 15 for warming air is disposed between the blower 14 and the exhaust port 12. For example, the heater 15 is formed to wind a heating wire on a support plate disposed in the casing 1. The heater 15 warms the air in the casing 1 to cause the airflow discharged from the exhaust port 12 to become warm air. The blower includes an ion generating unit (charged particle generating unit) 16 that generates air ions (charged particles) in the air. The ion generating unit 16 is disposed in the housing 1 . The ion generating unit 16 includes a needle-shaped discharge electrode and an annular sensor electrode surrounding the discharge electrode. A voltage is applied between the discharge electrode and the dielectric electrode to cause corona discharge, and air ions are generated around the discharge electrode by corona discharge. The ion generating unit 16 has two sets of discharge electrodes and dielectric electrodes in order to generate positive air ions of H + (H 2 O) m or the like and negative air ions of O 2 - (H 2 O) n or the like. . The ion generating unit 16 causes positive and negative air ions to be generated in the air inside the casing 1. The air ions generated by the ion generating unit 16 are mixed into the air in the casing 1, and the air stream containing the air ions is discharged from the exhaust port 12. The blower has a control unit 17 that controls the operation of each part. The control unit 17 is connected to the operation unit 21, the blower 14, the heater 15, and the ion generating unit 16. The control unit 17 controls the operations of the blower 14, the heater 15, and the ion generating unit 16 based on the operation from the user accepted by the operation unit 21. The heater 15 and the control unit 17 correspond to a warming unit. Further, the blower includes a push switch 13 that is pressed when the cover 3 is attached to the casing 1. As shown in FIGS. 4 and 6, the push switch 13 is disposed at a position opposite to the cover 3 attached to the casing 1. The push switch 13 is in a state of being pressed when the cover 3 is attached to the casing 1, and is not pressed when the cover 3 is not mounted. The switch 13 is connected to the control unit 17. The control unit 17 prohibits the operation of the heater 15 when the push switch 13 is pressed. Further, the control unit 17 can operate the heater 15 when the push switch 13 is not pressed. As described above, in the state where the cover 3 is attached to the casing 1, the blower does not warm the air by the heater 15. In the state shown in FIG. 5, when the user operates the operation unit 21, the control unit 17 operates the blower 14 and the ion generating unit 16. Air containing air ions is discharged from the exhaust port 12 and passes through a ventilation path in the cover 3 to be blown to the user's head. The released air is not immediately dissipated and is retained in a certain amount of time inside the cover 3 covering a part of the user's head. Therefore, the air ions contained in the air do not escape but stay inside the cover 3 and concentrate on the portion of the user's head covered by the cover 3. By the concentration and action of the air ions, the air ions contained in the portion covered by the cover 3 are applied to the hair and scalp contained in the portion covered by the cover 3 than the air ions having a higher density. By the air ions remaining in the inside of the cover 3, the time during which air ions act on the hair and the scalp becomes longer than before. Further, since the air containing air ions is blown to the head in a state in which the plurality of rod-shaped bodies 331 of the head stimulating body 33 are pulled apart, the air ions are effectively in contact with the hair and the scalp, and the air ions act efficiently on the hair. Hair and scalp. Therefore, the hair and scalp are improved in the environment of hair and scalp by removing electricity, removing bacteria and moisturizing. Further, since the scalp of the user is stimulated by the head stimulator 33 and the air ions act, it is more desirable to improve the effect of improving the environment of the scalp. Further, since the heater 15 does not warm the air in a state where the cover 3 is attached to the casing 1, there is no case where the heated air is discharged from the exhaust port 12. In the case where the air is warmed, since the warmed air is continuously concentrated and blown to a part of the user's head, heat dissipation is also difficult, so that the user is burnt. In the present embodiment, since the air is not heated in a state where the cover 3 is attached to the casing 1, the air that is not heated is blown to the head of the user, and the user is burned. It is low. Further, the control unit 17 measures the temperature of the air passing through the ventilation path in the casing 1 using a temperature sensor (not shown), and controls the action of the heater 15 so that the temperature of the air does not correspond to the temperature measurement result. Will become a specific temperature or more. For example, the control unit 17 adjusts the temperature of the air using PID (Proportional-Integral-Differential) control. When the push switch 13 is not normally operated due to damage or the like, even if the cover 3 is attached to the casing 1, the air is heated, and the user is burnt. In the present embodiment, by adjusting the temperature of the air so as not to become a specific temperature or higher, even when the push switch 13 is not normally operated, the occurrence of burns can be suppressed. Further, the blower includes a nozzle 4 that can be fixedly detached from the casing 1. Fig. 7 is a side view of the hair dryer in a state where the nozzle 4 is attached to the casing 1, and Fig. 8 is a perspective view of the hair dryer in a state in which the nozzle 4 is separated from the casing 1. The nozzle 4 is replaced with the cover 3 and attached to the casing 1. The nozzle 4 is attached to the casing 1 so as to be coupled to the exhaust port 12, and the air discharged from the exhaust port 12 is narrowed and released. Further, the nozzle 4 is formed in a shape that does not press the push switch 13 when mounted on the casing 1. Therefore, in a state where the nozzle 4 is attached to the casing 1, the control unit 17 operates the heater 15, the heater 15 warms the air, and the warmed air is discharged through the nozzle 4. The user can perform the operation of drying with warmed air in the same manner as the previous hair dryer. (Embodiment 2) FIG. 9 is a side view of a hair dryer of Embodiment 2. Fig. 10 is a schematic side view of the hair dryer of Embodiment 2 showing the inside of the cover 31. The inside of the cover 3 is shown in Fig. 10, and the outer shape of the cover 3 is indicated by a broken line. The configuration of the hair dryer other than the cover 3 is the same as that of the first embodiment. The cover 3 has an opening 31 and further has a bowl 34 in the ventilation path. The bowl 34 is formed in a bowl shape in which one surface is concave and the other surface is convex. The curvature of the concave surface is the same as the human head. The bowl 34 is disposed to pass through the opening 31 and has a concave surface facing the outer side of the cover 3. The bowl 34 is attached to the body of the cover 3 via the mounting member 35. Figure 11 is a schematic cross-sectional view of the bowl 34. A plurality of holes 341 are formed in the bowl 34. Further, a plurality of protrusions 342 are provided on the concave surface of the bowl 34. In the same manner as in the first embodiment, the user holds the hair dryer in such a manner that the opening portion 31 faces the head of the user, and covers one portion of the head portion with the cover body 3. At this time, the opening portion 31 contacts or approaches the head of the user, and the bowl 34 faces the concave portion of the user's head to cover one portion of the head. The concave surface of the bowl 34 contacts or approaches the head of the user, and the protrusion 342 disengages the hair to contact the scalp, thereby stimulating the scalp. The mounting member 35 has a function of absorbing the force of pressing the bowl 34 toward the head. Even when the bowl 34 is pressed against the user's head by a strong force of a desired degree or more, the pressing force is absorbed by the mounting member 35, and a moderate stimulus is applied to the head. When the user operates the blower, air containing air ions is released from the exhaust port 12, and is not dissipated but stays inside the cover 3. Air containing air ions will pass through the aperture 341 to contact the head of the user. Therefore, the air ions are concentrated on the portion of the user's head that is covered by the bowl 34. The higher density air ions act on the hair and scalp than before, and the time during which air ions act on the hair and scalp becomes longer than before. Further, since the air containing the air ions is blown to the head in a state where the projections 342 are pulled apart, the air ions are effectively brought into contact with the hair and the scalp, and the air ions are efficiently applied to the hair and the scalp. Therefore, in the present embodiment, the effect of improving the environment of the hair and the scalp by using air ions is also improved. Further, since the scalp of the user is stimulated by the protrusion 342 and the air ions act, it is more desirable to improve the effect of improving the environment of the scalp. (Embodiment 3) The configuration of the hair dryer of Embodiment 3 is the same as that of Embodiment 1 or 2. In the present embodiment, when the heater 15 is operated to warm the air, the control unit 17 can switch to the first mode in which the temperature of the air is kept within a relatively low temperature range and the temperature of the air is warmed. To the second mode of higher temperature. In the first mode, the control unit 17 measures the temperature of the air passing through the ventilation path in the casing 1 using a temperature sensor (not shown), and controls the action of the heater 15 in accordance with the measurement result of the temperature to The temperature of the air is maintained within a specific temperature range. In the second mode, the control unit 17 controls the operation of the heater 15 in accordance with the temperature measurement result to warm the air to a temperature higher than that in the first mode. The user can operate the operation unit 21 and instruct the switching between the first mode and the second mode. The control unit 17 switches between the first mode and the second mode in accordance with the operation of the operation unit 21, and operates the heater 15 in the first or second mode. Also in the present embodiment, the hair dryer includes a push switch 13 that is pressed when the cover 3 is attached to the casing 1. The push switch 13 is in a state of being pressed when the cover 3 is attached to the casing 1, and is not pressed when the cover 3 is not mounted. The switch 13 is connected to the control unit 17. In the present embodiment, the control unit 17 prohibits the heater 15 from operating in the second mode when the push switch 13 is pressed. Further, the control unit 17 can operate the heater 15 in the second mode when the push switch 13 is not pressed. In this manner, the control unit 17 and the heater 15 do not operate in the second mode while the cover 3 is attached to the casing 1, but heat the air in the first mode. Also in the present embodiment, the hair dryer is used in the same manner as in the first and second embodiments. The air ions contained in the air from which the exhaust port 12 is discharged are not dissipated but are retained inside the cover 3 covering a part of the user's head, and are covered by the cover 3 concentrated on the user's head. Part of it works. Therefore, similarly to the first and second embodiments, the effect of improving the environment of the hair and the scalp by the air ions is improved. Further, in the present embodiment, in a state where the cover 3 is attached to the casing 1, the control unit 17 and the heater 15 are operated in the second mode, and the air is heated in the first mode. The air is blown to the user's head by a temperature whose temperature is maintained within a relatively low temperature range, and the possibility of the user being burned is low. Further, in the present embodiment, the control unit 17 controls the operation of the heater 15 using a temperature sensor so that the temperature of the air does not become a specific temperature or higher. Therefore, the blower can suppress the occurrence of burns even when the push switch 13 is not normally operated. Further, in the above-described first to third embodiments, the control unit 17 restricts the operation of the heater 15 when the cover 3 is attached to the casing 1. However, the blower may be provided with the push switch 13 being pressed. The mechanism for mechanically turning off the circuit for operating the heater 15 is provided. Further, in the first to third embodiments, the case where the cover switch 3 is attached to the casing 1 by the push switch 13 is shown. However, the cover 3 may be attached to the casing 1 by another method. The form of the situation. For example, the blower detects a case where the cover 3 is attached to the casing 1 using a switch other than a push switch such as a touch switch. Further, for example, the cover 3 has a circuit connected to the control unit 17 when mounted on the casing 1. The control unit 17 detects that the cover 3 has been attached to the casing 1 by detecting that the circuit is connected. When it is detected that the cover 3 is attached to the casing 1, the control unit 17 prohibits the warming of the air or prohibits the operation in the second mode. Further, in the first to third embodiments, the charged particle generating unit is in the form of the ion generating unit 16, but the blower may be provided with a charged particle generating unit that generates charged particles other than air ions in the air. For example, the hair dryer may be provided with a charged particle generating portion that generates charged water and discharges it into the air. Also in the form of charged particles other than air ions generated in the charged particle generating portion, the effect of improving the environment of the hair and the scalp can be obtained by the action of the charged particles. Further, the blower may be in a form in which the heater 15 is not provided. As described above, the hair dryer of the present invention comprises: a casing (1) having an intake port (11) and an exhaust port (12); and a charged particle generating portion (16) for causing charged particles to be generated in the air; The blower discharges air containing charged particles from the exhaust port (12), and is characterized in that a cover body (3) is provided, the cover body has an opening portion (31), and the opening portion (31) and the user are The head portion is opposed to cover one portion of the head portion; and the cover body (3) is coupled to the exhaust port (12) to form a ventilation path terminated by the opening portion (31). In the present invention, the hair dryer includes a charged particle generating portion (16). Further, the blower includes a cover (3) coupled to the exhaust port (12) of the casing (1) and covering the head of the user. The hair dryer is used such that the opening (31) of the cover (3) faces the head of the user. The air containing the charged particles is discharged from the exhaust port (12) of the casing (1), and the released air is retained in the casing (3). The charged particles contained in the air are concentrated on the portion of the user's head covered by the cover (3). The hair dryer of the present invention is characterized in further comprising: a warming portion (15, 17) for warming air; and the cover (3) is fixedly detachable from the casing (1); the warming portion (15, 17) The air will not be heated in a state where the cover (3) is attached to the casing (1). In the present invention, the cover (3) is detachably fixed with respect to the casing (1), and the blower does not warm the air in a state where the cover (3) is attached to the casing (1). In the case where the cover (3) is attached to the casing (1) and a blower is used, although the air is concentratedly blown to a part of the user's head, the air is not warmed, and the possibility of the user being burned is low. The hair dryer of the present invention is characterized in further comprising: a switch (13) that is pressed when the cover (3) is attached to the casing (1); and the heating portion (15, 17) is in the switch (13) When the air is pressed, no warm air is applied, and when the aforementioned switch (13) is not pressed, the air can be warmed. In the present invention, the blower includes a switch (13) that is pressed when the cover (3) is attached to the casing (1). The blower does not perform air warming when the switch (13) is pressed. Therefore, the air is not warmed in a state where the cover (3) is attached to the casing (1). The hair dryer of the present invention is characterized in further comprising: a warming portion (15, 17) for warming air; and the cover (3) is fixedly detachable from the casing (1); the warming portion (15, 17) switchable to a first mode of warming air to maintain a temperature of the air within a specific temperature range and a second mode of warming the temperature of the air to a temperature higher than the aforementioned specific temperature range, and in the foregoing cover When the body (3) is attached to the casing (1), it will not operate in the second mode. In the present invention, the blower is switched to the first mode in which the air is heated to maintain the temperature in a relatively low temperature range, and the second mode in which the air is heated to a higher temperature to warm the air. The cover (3) is detachably fixed to the casing (1), and the blower does not warm the air in the second mode in a state where the cover (3) is attached to the casing (1). In the case where the cover (3) is attached to the casing (1) and the blower is used, the blower warms the air in the first mode, the temperature of the air is kept low, and the possibility of the user being burned is low. A hair dryer according to the present invention is characterized by further comprising: a switch (13) that is pressed when the cover (3) is attached to the casing (1); and the heating portion (15, 17) is in the switch (13) When it is pressed, it does not operate in the second mode, and when the switch (13) is not pressed, the second mode can be operated. In the present invention, the blower includes a switch (13) that is pressed when the cover (3) is attached to the casing (1). When the switch (13) is pressed, the blower does not warm the air in the second mode. Therefore, when the cover (3) is attached to the casing (1), the air is not heated in the second mode. A hair dryer according to the present invention is characterized by further comprising: a nozzle (4) attached to the exhaust port (12) in a state in which the cover (3) is detached from the casing (1) The casing (1); and the nozzle (4) is formed in a shape in which the switch (13) is not pressed in a state of being attached to the casing (1). In the present invention, the blower includes a nozzle (4) that is replaceable with the cover (3) and attached to the casing (1). The nozzle (4) is formed so as not to press the switch (13). Therefore, in a state where the nozzle (4) is attached to the casing (1), the blower can discharge the air heated to a high temperature. In the hair dryer of the present invention, the warming portion (15, 17) does not cause the temperature of the air to be higher than a specific temperature. In the present invention, the hair dryer does not cause the temperature of the air to be higher than a specific temperature. Therefore, even if the switch (13) does not operate normally, the blower does not excessively raise the temperature of the air. The hair dryer of the present invention is characterized in that a part of the cover body (3) is in contact with the head of the user and is provided with a head stimulating body (33) for stimulating the head portion in the ventilation path; and the head stimulating body (33) A plurality of rod-shaped bodies for contacting the head portion with the front end. In the present invention, the cover body (3) is provided with a head stimulating body (33) that stimulates the head of the user. The head stimulator (33) has a plurality of rods (331). When the hair dryer is used, the rod body (331) pulls the hair apart to stimulate the scalp, and the charged particles contained in the air act on the hair and the scalp. The hair dryer of the present invention is characterized in that the cover body (3) is provided in the ventilation path: a bowl-shaped body (34) having a concave surface and covering the head portion in such a manner that the concave surface faces the head of the user; The bowl (34) is formed with a plurality of holes (341) through which air passes, and a plurality of protrusions (342) for contacting the head are provided on the concave surface. In the present invention, a bowl (34) is provided in the cover (3). A plurality of holes (341) are formed in the bowl (34), and a plurality of protrusions (342) are provided on the concave surface. In use of the blower, the bowl (34) faces the user's head to cover a portion of the head. The protrusion (342) irritates the scalp by pulling the hair apart, and the charged particles contained in the air act on the hair and the scalp.