TWI811122B

TWI811122B - Air Conditioners with Improved Airflow Efficiency

Info

Publication number: TWI811122B
Application number: TW111136645A
Authority: TW
Inventors: 黃軍豪; 邱垂德; 劉子靖
Original assignee: 台灣日立江森自控股份有限公司
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-08-01
Also published as: TW202413851A

Abstract

本案為解決現有空調機之風扇氣流效能不佳等問題，而提供一種可增進氣流效能的空調機，其包含：框架；風扇，固定至框架，且界定一軸心線；熱交換器，固定至該框架，且位於風扇的一側；護罩，固定至框架，且位於風扇的另一側；和控制電路，電性地連接至風扇，以控制風扇的運轉狀態。該護罩包括環狀第一肋和沿著第一肋之徑向延伸的第二肋。第一肋的中心線和風扇的軸心線平行，第二肋傾斜於第一肋之中心線。當風扇旋轉時，風扇所產生的氣流對第二肋的撞擊小，以保持氣流的強度。In order to solve the problems of poor airflow performance of fans in existing air conditioners, this case provides an air conditioner that can improve airflow performance, which includes: a frame; a fan fixed to the frame and defining an axis; a heat exchanger fixed to The frame is located on one side of the fan; the shield is fixed to the frame and located on the other side of the fan; and the control circuit is electrically connected to the fan to control the running state of the fan. The shroud includes an annular first rib and a second rib extending radially along the first rib. The central line of the first rib is parallel to the axis of the fan, and the second rib is inclined to the central line of the first rib. When the fan rotates, the airflow generated by the fan has little impact on the second rib, so as to maintain the strength of the airflow.

Description

可增進氣流效能的空調機Air Conditioners with Improved Airflow Efficiency

本案是有關於一種空調機，特別是指一種可增進氣流效能的空調機。This case is about an air conditioner, especially an air conditioner that can improve air flow efficiency.

一般的冷氣機都包含有暴露於室外的散熱片、風扇、和格柵形護罩。藉由轉動風扇帶動氣流通過散熱片，以將散熱片上的熱散逸在冷氣機周圍的室外環境中，以降低散熱片和在散熱片內流動之冷媒的溫度。但是冷氣機中所使用的風扇屬於軸流扇，其所引發之氣流的形狀類似龍捲風，更明確地說，該氣流係繞著風扇軸心線旋轉並前進。因此該旋轉的氣流會撞擊在構成護罩的肋條上，此撞擊消耗了氣流的動能，所以是氣流前進的阻力，導致風扇所產生的氣流軟弱無力或無法吹得更遠，進而降低散熱片的散熱效能。為了解決上述的缺失，需要改善護罩的構造，以提升氣流的效能。另一方面，當風扇帶動的氣流通過散熱片時，氣流中的灰塵汙物和雜物(例如棉絮、植物的花絮、樹葉等)可能黏附在散熱片的表面上或卡在各散熱片之間的縫隙。首先，黏附在散熱片表面上的灰塵汙物會阻隔散熱片表面和氣流之間的接觸，使得氣流無法帶走散熱片的熱量。其次，卡在各散熱片之間的雜物會阻擋氣流的流動，降低氣流的流動速率和流量。上述兩種狀況都不利地影響散熱片的散熱效能，換個角度看，也會浪費電能和增加電費。為了解決上述的缺失，需要適時地清潔冷氣機的散熱片。但冷氣機通常安裝在建築物的牆壁外側，若以人工清潔，不僅不方便接近冷氣機，甚至易生危險。因此需要更方便和更安全的清潔設計。 A general air conditioner includes a heat sink, a fan, and a grille-shaped shroud exposed to the outside. By rotating the fan to drive airflow through the heat sink, the heat on the heat sink is dissipated in the outdoor environment around the air conditioner, so as to reduce the temperature of the heat sink and the refrigerant flowing in the heat sink. However, the fan used in the air conditioner belongs to the axial fan, and the shape of the airflow caused by it is similar to a tornado. More specifically, the airflow system rotates around the axis of the fan and advances. Therefore, the rotating airflow will hit the ribs that make up the shield. This impact consumes the kinetic energy of the airflow, so it is the resistance of the airflow forward, causing the airflow generated by the fan to be weak or unable to blow farther, thereby reducing the heat sink. Cooling performance. In order to solve the above deficiencies, it is necessary to improve the structure of the shield so as to improve the efficiency of the airflow. On the other hand, when the airflow driven by the fan passes through the heat sink, the dust, dirt and debris (such as cotton wool, plant flecks, leaves, etc.) in the airflow may adhere to the surface of the heat sink or get stuck between the heat sinks. gap. First of all, the dust and dirt adhering to the surface of the heat sink will block the contact between the surface of the heat sink and the airflow, so that the airflow cannot take away the heat of the heat sink. Secondly, the sundries stuck between the heat sinks will block the flow of airflow, reducing the flow rate and flow rate of airflow. The above two conditions will adversely affect the heat dissipation performance of the heat sink, and from another perspective, it will also waste electric energy and increase electricity bills. In order to solve the above-mentioned deficiency, it is necessary to clean the cooling fins of the air conditioner in a timely manner. However, air-conditioners are usually installed on the outside of the walls of buildings. If they are cleaned manually, it is not only inconvenient to access the air-conditioners, but it may even be dangerous. Therefore, there is a need for more convenient and safer cleaning designs.

因此，本案之一目的，在於提供一種可增進氣流效能的空調機，其能利用空調機所包含的零組件自動進行清潔作業。本案之另一目的，在於提供一種可增進氣流效能的空調機，其能使風扇產生的氣流能更有效率地進行清潔作業。本案之又一目的，在於提供一種可增進氣流效能的空調機，其能提升風扇產生之氣流的散熱效能。於是，本案提供一種可增進氣流效能的空調機，包含：框架；風扇，固定至該框架，且界定一軸心線；熱交換器，固定至該框架，且位於該風扇的一側；護罩，固定至該框架，且位於該風扇的另一側；該護罩包括複數環狀第一肋和沿著該等第一肋之徑向延伸的第二肋；該等第一肋的中心線和該風扇的該軸心線平行，該第二肋傾斜於該等第一肋之該中心線；和控制電路，電性地連接至該風扇，以控制該風扇的運轉狀態；藉此，當該風扇旋轉時，該風扇所產生的氣流對該等第二肋的撞擊小，以保持該氣流的強度。較佳地，該第二肋連接至該等第一肋構成複數連接處，且該第二肋在該等連接處的該等第一肋的環狀外表面上沿著傾斜於該等第一肋之該中心線的方向延伸。較佳地，該等第一肋的該中心線和該風扇的該軸心線同軸。較佳地，該等第一肋構成一垂直於該第一肋之該中心線的平面或構成一錐面。較佳地，該等第一肋之徑向垂直於該風扇的該軸心線。較佳地，該控制電路可驅動該風扇正轉或反轉；當該風扇正轉時，該空調機進行調節溫度的功能；當該風扇反轉時，該空調機進行自體清潔的功能。較佳地，當該控制電路啟動該熱交換器的運轉時，該風扇正轉，當該控制電路關斷該熱交換器的運轉時，該風扇反轉。較佳地，該控制電路使該風扇正轉的轉速低於臨界值之後，才進行後續的反轉。較佳地，該護罩另外包括複數第三肋，其比該等第二肋還短，且分別設置在相鄰兩個該等第二肋之間。本案相較於現有技術的優點已如上文各目的所述，熟悉此技術者可在閱讀說明書之後，更瞭解請求項中所界定之本案的其他好處和其他目的。 Therefore, one purpose of the present case is to provide an air conditioner capable of improving the airflow efficiency, which can automatically perform cleaning operations using the components contained in the air conditioner. Another object of the present application is to provide an air conditioner capable of improving the airflow performance, which enables the airflow generated by the fan to perform cleaning operations more efficiently. Another object of the present case is to provide an air conditioner capable of improving the airflow performance, which can improve the cooling performance of the airflow generated by the fan. Therefore, the present application provides an air conditioner capable of improving airflow performance, comprising: a frame; a fan fixed to the frame and defining an axis; a heat exchanger fixed to the frame and located on one side of the fan; a shroud , fixed to the frame, and located on the other side of the fan; the shroud includes a plurality of annular first ribs and second ribs extending radially along the first ribs; the centerline of the first ribs parallel to the axial center line of the fan, the second rib is inclined to the center line of the first ribs; and a control circuit, electrically connected to the fan, to control the operating state of the fan; thereby, when When the fan rotates, the airflow generated by the fan has little impact on the second ribs, so as to maintain the strength of the airflow. Preferably, the second rib is connected to the first ribs to form a plurality of joints, and the second rib is inclined to the first ribs on the annular outer surface of the first ribs at the joints. The ribs extend in the direction of the centerline. Preferably, the centerlines of the first ribs and the axis of the fan are coaxial. Preferably, the first ribs form a plane perpendicular to the centerline of the first ribs or form a tapered surface. Preferably, the radial direction of the first ribs is perpendicular to the axis of the fan. Preferably, the control circuit can drive the fan to rotate forward or reversely; when the fan rotates forwardly, the air conditioner performs the function of adjusting temperature; when the fan rotates reversely, the air conditioner performs the function of self-cleaning. Preferably, when the control circuit starts the operation of the heat exchanger, the fan rotates forward, and when the control circuit turns off the operation of the heat exchanger, the fan rotates reversely. Preferably, the control circuit makes the fan rotate in the forward direction after the speed is lower than a critical value before performing the subsequent reverse rotation. Preferably, the shield additionally includes a plurality of third ribs, which are shorter than the second ribs and respectively arranged between two adjacent second ribs. The advantages of this case compared with the prior art have been described above for each purpose, and those who are familiar with this technology can better understand other benefits and other purposes of this case defined in the claims after reading the specification.

本案之前述以及其他技術內容、特點與功效，在以下配合參考圖式和較佳實施例的詳細說明中，將可清楚地明白。本案之可增進氣流效能的空調機1可例如為窗型冷氣機、分離式冷氣(或暖氣、或兩者)系統的室外機、車用冷暖氣系統的水箱裝置、---等。下文以分離式冷氣系統的室外機為例做詳細的說明。如圖1所示，本案之可增進氣流效能的空調機1的較佳實施例包含：框架11、固定至框架11的風扇12、固定至框架11且位於風扇12之一側的熱交換器13、固定至框架11且位於風扇12之相反另一側的格柵狀護罩14、和電性地連接至風扇12的控制電路15。該風扇12可例如使用軸流扇，以產生類似龍捲風的氣流。詳言之，該氣流係繞著風扇12之軸心線16[定義為第二方向，例如直角座標系的Y軸方向]旋轉並前進。該熱交換器13可包括由彎曲管路所構成的散熱鰭管[未示]，並連通至整個冷氣系統的冷媒循環裝置[未示]。如圖2和圖3所示，該護罩14可包括複數環狀第一肋141、在第一肋141之圓環的徑向延伸並與第一肋141連接的複數第二肋142、和分別位於兩相鄰第二肋142之間且在上述徑向延伸並與第一肋141連接的複數第三肋143。該複數環狀第一肋141的中心線16(通過圓環之中心且垂直於圓環平面的假想延伸線)與風扇之軸心線16可同軸或平行。複數環狀第一肋141可構成一垂直於第一肋141之中心線16的平面或可構成具有小錐度的圓錐面。複數第二肋142中的兩個第二肋142分別位於直角座標系的X軸方向[定義為第一方向]和Z軸方向[定義為第三方向]。如圖4所示，將第一肋141的圓環展開成沿著第一方向X延伸的直線。第三肋143在X-Y平面之橫剖面輪廓的縱向平行於第二方向Y，亦即第三肋143的橫剖面輪廓的縱向和第一方向X垂直。如圖5所示，將第一肋141的圓環展開成沿著第一方向X延伸的直線。第二肋142在X-Y平面之橫剖面輪廓的縱向不平行於第二方向Y，亦即第二肋142的橫剖面輪廓的縱向傾斜於第二方向Y，且不垂直於第一方向X。換言之，第二肋142在與第一肋141相連接處的第一肋141環狀外表面上沿著傾斜於第一肋141之中心線16的方向延伸(圖3)。如圖1所示，控制電路15分別電性地連接至風扇12和冷媒循環裝置。此外，控制電路15可設置包括至少兩個操作選項的一個選擇開關(未示)；當將選擇開關轉至第一個選項時，控制電路15啟動冷媒循環裝置並可允許風扇12正轉；當將選擇開關轉至第二個選項時，控制電路15停止冷媒循環裝置並可啟動風扇12反轉。在另一實施例中，可將控制電路15設計成關斷冷媒循環裝置的運轉開關時，控制電路15就產生一個訊號用於啟動風扇12反轉一段期間。在上述兩種實施例中，控制電路15可在變換風扇12的旋轉方向時，使風扇12原來的轉速低於某一臨界值之後，才進行後續相反方向的旋轉，以保護用於驅動風扇12的馬達。運轉狀態本案的護罩14在風扇12正轉[氣流從風扇12吹向護罩14]和反轉[氣流從風扇12吹向熱交換器13]的兩種運轉狀態都可增進氣流的效能。下文先以風扇12反轉的運轉狀態說明本案的護罩14如何增進氣流的效能。習知技術的護罩只有第一肋141和第三肋143(圖4)，因此當控制電路15啟動風扇12反轉，風扇12之扇葉從護罩14的外側吸入空氣引發龍捲風狀的旋轉氣流通過護罩14時，因為第三肋143的橫剖面輪廓的縱向垂直於第一方向X，所以旋轉氣流會撞擊在第三肋143沿第二方向Y延伸的側面上，使氣流第一次轉彎17至平行於第二方向Y，氣流沿著第二方向Y行進一小段距離至離開護罩14的第三肋143後，受到旋轉扇葉所產生的吸力再第二次轉彎18流入風扇12中。在上述的行程中，氣流首先撞擊在第三肋143沿第二方向Y延伸的側面上，第一次耗損了前進的動能。接下來，氣流轉了兩次彎，再兩次耗損了前進的動能。在上述的行程中，氣流總共三次耗損前進的動能，因此第三肋143形成氣流前進的阻力，導致風扇12所產生的氣流軟弱無力或無法吹得更遠。即使通過風扇12的氣流能夠繼續吹向熱交換器13，但因氣流的動能已被第三肋143所耗損，所以氣流的速率或流率降低，進而降低熱交換器13之散熱鰭管的散熱效能；另一方面，因為氣流的強度減弱，因此不易吹掉卡在熱交換器13上的雜物。相對地，如圖5所示，本案的護罩14至少包括第一肋141和第二肋142，因此當控制電路15啟動風扇12反轉後，風扇12之扇葉從護罩14的外側吸入空氣引發龍捲風狀的旋轉氣流通過護罩14時，因為第二肋142的橫剖面輪廓的縱向傾斜於第二方向Y，且非垂直於第一方向X，亦即第二肋142的縱向和旋轉氣流的流動方向相近，因此旋轉氣流不會撞擊在第二肋142沿其縱向延伸的側面上，而是順著第二肋142的傾斜方向被引導進入風扇12中。在上述的行程中，氣流撞擊在第二肋142的動能損耗非常小，且氣流也幾乎不必轉彎而無動能損耗，因此第二肋142對於氣流的前進幾乎沒有阻力，使得風扇12所產生的氣流強而有力，且可以吹得更遠。因此通過風扇12的氣流能夠以高速率和高流率吹至熱交換器13，進而提升熱交換器13之散熱鰭管的散熱效能；另一方面，因為氣流保持高強度，因此可輕易地吹掉卡在熱交換器13上的雜物。同理，當控制電路15啟動風扇12正轉時，從風扇12吹向習知護罩的旋轉氣流也會撞擊在習知護罩的第三肋143上，降低風扇12出風之氣流的速率和流率，連帶地影響從熱交換器13被吸入風扇12之氣流的速率和流率，導致減損熱交換器13的散熱效率。相對地，當控制電路15啟動風扇12正轉時，從風扇12吹向本案護罩14的旋轉氣流不會撞擊在本案護罩14的第二肋142上，而是受到第二肋142的引導，很順暢地流出護罩14，使得從熱交換器13被吸入風扇12之氣流能夠以高的速率和流率散逸熱交換器13的熱量，提升熱交換器13的散熱效率，有效率地進行調節溫度的功能。其它實施例本案的護罩14可只包括第一肋141和第二肋142。在其它實施例中，本案的護罩14可包括第一肋141、較多且較長的第二肋142、和較少且較短的第三肋143。功效本案的空調機1可藉由護罩14之具有特殊角度的第二肋142來引導風扇12的氣流，保持氣流的順暢，因此可以提升風扇12產生之氣流的散熱效能，進行調節溫度的功能。本案的空調機1可藉由其內所設之風扇12的反轉，以吹掉黏附在熱交換器13上的灰塵和卡在熱交換器13上的雜物，因此可使用自體所包含的零組件進行清潔作業。本案的空調機1因為其護罩14上的第二肋142具有順應旋轉氣流的角度，所以不會耗損氣流的動能，使得風扇12產生的氣流能夠強勁地吹掉熱交換器13上的灰塵和雜物，因此能更有效率地進行自體清潔的作業。歸納上述，本案可增進氣流效能的空調機1因為上述的創新構造，故確實能達到本案之目的。惟以上所述者，僅為本案之較佳實施例而已，當不能以此限定本案實施之範圍，即大凡依本案申請專利範圍及發明說明書內容所作之簡單的等效變化與修飾，皆應仍屬本案專利涵蓋之範圍內。 The aforementioned and other technical contents, features and functions of this case will be clearly understood in the following detailed description with reference to the drawings and preferred embodiments. The air conditioner 1 that can improve airflow efficiency in this case can be, for example, a window air conditioner, an outdoor unit of a separate air conditioner (or heating, or both) system, a water tank device of a vehicle heating and cooling system, etc. The following takes the outdoor unit of the split air-conditioning system as an example to make a detailed description. As shown in Figure 1, the preferred embodiment of the air conditioner 1 that can improve the airflow efficiency of the present case includes: a frame 11, a fan 12 fixed to the frame 11, a heat exchanger 13 fixed to the frame 11 and located on one side of the fan 12 , a grille-shaped shield 14 fixed to the frame 11 and located on the opposite side of the fan 12 , and a control circuit 15 electrically connected to the fan 12 . The fan 12 can, for example, use an axial fan to generate a tornado-like airflow. In detail, the airflow rotates around the axis 16 of the fan 12 [defined as the second direction, such as the Y-axis direction of the Cartesian coordinate system] and advances. The heat exchanger 13 may include a heat dissipation fin tube [not shown] formed by curved pipes, and is connected to a refrigerant circulation device [not shown] of the entire air-conditioning system. As shown in Figures 2 and 3, the shield 14 may include a plurality of annular first ribs 141, a plurality of second ribs 142 extending in the radial direction of the ring of the first ribs 141 and connected to the first ribs 141, and A plurality of third ribs 143 respectively located between two adjacent second ribs 142 and extending in the aforementioned radial direction and connected to the first ribs 141 . The centerline 16 of the plurality of annular first ribs 141 (an imaginary extension line passing through the center of the ring and perpendicular to the plane of the ring) can be coaxial or parallel to the axis 16 of the fan. The plurality of annular first ribs 141 can form a plane perpendicular to the centerline 16 of the first ribs 141 or can form a conical surface with a small taper. The two second ribs 142 of the plurality of second ribs 142 are respectively located in the X-axis direction [defined as the first direction] and the Z-axis direction [defined as the third direction] of the Cartesian coordinate system. As shown in FIG. 4 , the circular ring of the first rib 141 is developed into a straight line extending along the first direction X. As shown in FIG. The longitudinal direction of the cross-sectional profile of the third rib 143 on the X-Y plane is parallel to the second direction Y, that is, the longitudinal direction of the cross-sectional profile of the third rib 143 is perpendicular to the first direction X. As shown in FIG. 5 , the circular ring of the first rib 141 is developed into a straight line extending along the first direction X. As shown in FIG. The longitudinal direction of the cross-sectional profile of the second rib 142 on the X-Y plane is not parallel to the second direction Y, that is, the longitudinal direction of the cross-sectional profile of the second rib 142 is inclined to the second direction Y and not perpendicular to the first direction X. In other words, the second rib 142 extends along a direction inclined to the centerline 16 of the first rib 141 on the annular outer surface of the first rib 141 where it connects with the first rib 141 ( FIG. 3 ). As shown in FIG. 1 , the control circuit 15 is electrically connected to the fan 12 and the refrigerant circulation device, respectively. In addition, the control circuit 15 can be provided with a selection switch (not shown) including at least two operation options; when the selection switch is turned to the first option, the control circuit 15 starts the refrigerant circulation device and can allow the fan 12 to rotate forward; When the selector switch is turned to the second option, the control circuit 15 stops the refrigerant circulation device and can start the fan 12 to reverse. In another embodiment, the control circuit 15 can be designed so that when the operating switch of the refrigerant circulation device is turned off, the control circuit 15 generates a signal for starting the fan 12 to reverse for a period of time. In the above two embodiments, when the control circuit 15 changes the rotation direction of the fan 12, the original rotation speed of the fan 12 is lower than a certain critical value, and then the subsequent rotation in the opposite direction is performed to protect the fan 12. motor. running status The shroud 14 of this case can improve the effectiveness of the air-flow in two operating states of the forward rotation of the fan 12 [the airflow is blown to the shroud 14 from the fan 12] and the reverse direction [the airflow is blown to the heat exchanger 13 from the fan 12]. In the following, the operating state of the fan 12 is reversed to illustrate how the shroud 14 of the present case improves the performance of the airflow. The shroud of the prior art has only the first rib 141 and the third rib 143 ( FIG. 4 ), so when the control circuit 15 activates the fan 12 to reverse, the blades of the fan 12 suck air from the outside of the shroud 14 to cause a tornado-like rotation When the airflow passes through the shroud 14, because the longitudinal direction of the cross-sectional profile of the third rib 143 is perpendicular to the first direction X, the swirling airflow will hit the side surface of the third rib 143 extending along the second direction Y, making the airflow for the first time Turning 17 to be parallel to the second direction Y, the airflow travels along the second direction Y for a short distance to the third rib 143 of the shroud 14, and then turns 18 to flow into the fan 12 after receiving the suction generated by the rotating blades middle. During the above stroke, the airflow first hits the side surface of the third rib 143 extending along the second direction Y, and consumes the forward kinetic energy for the first time. Next, the airflow turned twice and lost its forward kinetic energy twice. During the above-mentioned stroke, the airflow consumes the forward kinetic energy three times in total, so the third rib 143 forms a resistance to the airflow forward, causing the airflow generated by the fan 12 to be weak or unable to blow further. Even though the airflow through the fan 12 can continue to blow to the heat exchanger 13, the kinetic energy of the airflow has been consumed by the third rib 143, so the speed or flow rate of the airflow is reduced, thereby reducing the heat dissipation of the heat dissipation fins of the heat exchanger 13. efficiency; on the other hand, because the intensity of the airflow is weakened, it is not easy to blow off the sundries stuck on the heat exchanger 13 . Relatively, as shown in FIG. 5 , the shield 14 of this case includes at least a first rib 141 and a second rib 142 , so when the control circuit 15 activates the fan 12 to reverse, the blades of the fan 12 are sucked in from the outside of the shield 14 When the air causes a tornado-like swirling airflow to pass through the shroud 14, because the longitudinal direction of the cross-sectional profile of the second rib 142 is inclined to the second direction Y, and is not perpendicular to the first direction X, that is, the longitudinal and rotational direction of the second rib 142 The flow directions of the airflows are similar, so the swirling airflow will not hit the side of the second rib 142 along its longitudinal extension, but is guided into the fan 12 along the inclined direction of the second rib 142 . In the above-mentioned stroke, the kinetic energy loss of the airflow impinging on the second rib 142 is very small, and the airflow almost does not need to turn and has no kinetic energy loss, so the second rib 142 has almost no resistance to the advancement of the airflow, so that the airflow generated by the fan 12 Strong and powerful, and can blow farther. Therefore, the airflow through the fan 12 can be blown to the heat exchanger 13 at a high speed and a high flow rate, thereby improving the heat dissipation performance of the heat dissipation fin tube of the heat exchanger 13; Get rid of the sundries stuck on the heat exchanger 13. In the same way, when the control circuit 15 starts the fan 12 to rotate forward, the rotating airflow blown from the fan 12 to the conventional shield will also hit the third rib 143 of the conventional shield, reducing the speed of the airflow from the fan 12 and the flow rate jointly affect the velocity and flow rate of the airflow sucked into the fan 12 from the heat exchanger 13, resulting in degraded heat dissipation efficiency of the heat exchanger 13. In contrast, when the control circuit 15 starts the fan 12 to rotate forward, the rotating airflow blown from the fan 12 to the shield 14 of the present case will not hit the second rib 142 of the shield 14 of the present case, but be guided by the second rib 142 , flow out of the shroud 14 very smoothly, so that the airflow sucked into the fan 12 from the heat exchanger 13 can dissipate the heat of the heat exchanger 13 at a high speed and flow rate, improve the heat dissipation efficiency of the heat exchanger 13, and carry out the heat dissipation efficiently. Function to adjust temperature. other embodiments The shield 14 of the present application may only include the first rib 141 and the second rib 142 . In other embodiments, the shield 14 of the present application may include first ribs 141 , more and longer second ribs 142 , and fewer and shorter third ribs 143 . effect The air conditioner 1 of this case can guide the airflow of the fan 12 through the second rib 142 with a special angle of the shield 14 to keep the airflow smooth, so the heat dissipation performance of the airflow generated by the fan 12 can be improved and the temperature can be adjusted. The air conditioner 1 of this case can blow off the dust adhering to the heat exchanger 13 and the sundries stuck on the heat exchanger 13 by the reverse rotation of the fan 12 provided therein, so it can use the air conditioner contained in the body. components for cleaning. The air conditioner 1 of this case can not consume the kinetic energy of the air flow because the second rib 142 on its shield 14 has an angle conforming to the rotating air flow, so that the air flow produced by the fan 12 can blow off the dust and dust on the heat exchanger 13 strongly. debris, so the self-cleaning operation can be performed more efficiently. To sum up the above, the air conditioner 1 which can improve the air flow efficiency in this case can indeed achieve the purpose of this case because of the above-mentioned innovative structure. However, the above is only a preferred embodiment of this case, and should not limit the scope of implementation of this case, that is, all simple equivalent changes and modifications made according to the scope of patent application and the content of the description of the invention in this case should still be It falls within the scope covered by the patent in this case.

1:空調機 11:框架 12:風扇 13:熱交換器 14:護罩 15:控制電路 16:軸心線(中心線) 17:第一次轉彎 18:第二次轉彎 141:第一肋 142:第二肋 143:第三肋 1: air conditioner 11: frame 12: fan 13: Heat exchanger 14: Shield 15: Control circuit 16: Axis line (center line) 17: First turn 18: Second turn 141: First rib 142: second rib 143: third rib

[圖1]是本案可增進氣流效能的空調機的側面剖視圖。 [圖2]是本案可增進氣流效能的空調機之護罩的立體圖。 [圖3]是圖2之A部份的放大圖。 [圖4]是第三肋和氣流的狀態圖。 [圖5]是本案之第二肋和氣流的狀態圖。 [Fig. 1] is a side sectional view of the air conditioner that can improve the airflow efficiency of this case. [Fig. 2] It is a three-dimensional view of the guard cover of the air conditioner that can improve the air flow efficiency in this case. [ Fig. 3 ] is an enlarged view of part A of Fig. 2 . [ Fig. 4 ] is a state diagram of the third rib and air flow. [Fig. 5] is the state diagram of the second rib and airflow of this case.

1:空調機 1: air conditioner

11:框架 11: frame

12:風扇 12: fan

13:熱交換器 13: Heat exchanger

14:護罩 14: Shield

15:控制電路 15: Control circuit

16:軸心線(中心線) 16: Axis line (center line)

141:第一肋 141: First rib

Claims

一種可增進氣流效能的空調機，一空調機包含：框架；風扇，固定至該框架，且界定一軸心線；熱交換器，固定至該框架，且位於該風扇的一側；護罩，固定至該框架，且位於該風扇的另一側；該護罩包括複數環狀第一肋和沿著該等第一肋之徑向延伸的複數第二肋；該等第一肋的中心線和該風扇的該軸心線平行，該等第二肋傾斜於該等第一肋之該中心線；和控制電路，電性地連接至該風扇，以控制該風扇正轉或反轉，且使該風扇正轉的轉速低於臨界值之後才進行後續的反轉；藉此，當該風扇旋轉時，該風扇所產生的氣流對該等第二肋的撞擊小，以保持該氣流的強度。 An air conditioner capable of improving airflow performance, comprising: a frame; a fan fixed to the frame and defining an axis line; a heat exchanger fixed to the frame and located on one side of the fan; a shroud, fixed to the frame and located on the other side of the fan; the shroud includes a plurality of annular first ribs and a plurality of second ribs extending radially along the first ribs; the centerline of the first ribs parallel to the axis line of the fan, the second ribs are inclined to the center line of the first ribs; and a control circuit, electrically connected to the fan, to control the fan to rotate forward or reversely, and Make the forward rotation speed of the fan lower than the critical value before performing subsequent reverse rotation; thereby, when the fan rotates, the airflow generated by the fan has little impact on the second ribs, so as to maintain the strength of the airflow .

如請求項1所述之可增進氣流效能的空調機，其中該等第二肋連接至該等第一肋構成複數連接處，且該等第二肋在該等連接處的該等第一肋的環狀外表面上沿著傾斜於該等第一肋之該中心線的方向延伸。 The air conditioner capable of improving airflow performance as described in claim 1, wherein the second ribs are connected to the first ribs to form a plurality of joints, and the second ribs are at the first ribs of the joints The annular outer surface extends along a direction oblique to the centerline of the first ribs.

如請求項2所述之可增進氣流效能的空調機，其中該等第一肋的該中心線和該風扇的該軸心線同軸。 The air conditioner capable of improving airflow performance as claimed in claim 2, wherein the centerline of the first ribs is coaxial with the axis of the fan.

如請求項3所述之可增進氣流效能的空調機，其中該等第一肋構成一垂直於該第一肋之該中心線的平面或構成一錐面。 The air conditioner capable of improving airflow performance as described in Claim 3, wherein the first ribs form a vertical axis perpendicular to the centerline of the first ribs plane or form a conical surface.

如請求項4所述之可增進氣流效能的空調機，其中該等第一肋之徑向垂直於該風扇的該軸心線。 The air conditioner capable of improving airflow performance as claimed in claim 4, wherein the radial direction of the first ribs is perpendicular to the axis of the fan.

如請求項2所述之可增進氣流效能的空調機，其中當該風扇正轉時，該空調機進行調節溫度的功能；當該風扇反轉時，該空調機進行自體清潔的功能。 The air conditioner capable of improving airflow efficiency as described in claim 2, wherein when the fan rotates forward, the air conditioner performs the function of temperature adjustment; when the fan rotates reversely, the air conditioner performs the function of self-cleaning.

如請求項6所述之可增進氣流效能的空調機，其中當該控制電路啟動該熱交換器的運轉時，該風扇正轉，當該控制電路關斷該熱交換器的運轉時，該風扇反轉。 The air conditioner capable of improving airflow performance as described in claim 6, wherein when the control circuit starts the operation of the heat exchanger, the fan rotates forward, and when the control circuit turns off the operation of the heat exchanger, the fan reverse.

如請求項6所述之可增進氣流效能的空調機，該護罩另外包括複數第三肋，其比該等第二肋還短，且分別設置在相鄰兩個該等第二肋之間。 In the air conditioner capable of improving airflow performance as described in Claim 6, the shroud additionally includes a plurality of third ribs, which are shorter than the second ribs and respectively arranged between two adjacent second ribs .