201213751 六、發明說明： 【發明所屬之技術領域】 本案係關於一種電熱水器，尤其係關於一種智慧型節能電熱 水器。 【先前技術】 現有的電熱水器分為儲水式電熱水器及即熱式電熱水器。儲 水式電熱水器係將熱水儲存於一儲水槽，使用者打開水龍頭將熱 水及冷水混合為適溫的溫水。其缺點在於，當儲水槽内的水溫低 於一閥值，電熱水器將啟動儲水槽内的加熱管線將水加熱至額定 溫度’例如65°C ’或者將水導出儲水槽，以加熱器加熱後再回 流至儲水槽，此將消耗電能、增加電費，且儲水槽外部需包覆多 層隔熱材料。此外，其他種類的儲水式電熱水器無論何時、不分 四季均疋设定餘水槽之溫度為固定溫度，例如65。〔，且在儲水 槽中設置加齡線，直賊冷水加熱，雜賴水雜費相當大 的電能以及造成熱循環效果不佳之問題。 在即熱式電熱水器方面，在開啟水龍頭時，瞬間需大量電力 對冷水加熱，而且熱水出水量亦較少，不但消耗大量電能，而且 無法提供足量熱水。 故研發具有降低電能消耗、儲存足量熱水、且能即時 熱水的賴水H成為改良财技術的電熱水糾目標。 ’、 【發明内容】 熱器本St1)設置一個以上具有相同或相異輸出瓦數的加 熱器（2)以不同位置的溫度感測器侧 器而設料本㈣㈣齡器 201213751 ^依照四季之冷水溫度的不同，自動設定儲水槽溫度或加舞器之 輸出功率，例如夏天可設定為35T、春秋可設定為38Τ、冬天 :設定為55Τ等等’來進行將冷水加熱成為熱水且儲存於儲水 槽内，然後可將加熱後的熱水直接由出水口排出，使本發明 熱水器同時具_水式以及即献電熱水器的魏，且克服這兩 種電熱水器的缺失。 本發明的第-構想為-種電熱水器，包括：—個以上之加熱 器，該加熱器的每-個具有互不相_輸出瓦數，狀將水加轨 為具有第-溫度的水；—儲水槽，用以儲存該具有第一溫度的 水，第-溫度感測器，用以感測水之該第一溫度；以及一微電 腦控制器’合該第—溫度感測器，用以接收該第—溫度的訊 號，並控制該加熱器的至少一個的該輸出瓦數。 本發明的另—構想為該電熱水器更包含—第二溫度感測 器’輕合該第二溫度細H，肋翻水之該第二溫度。 本發月的再一構想為該儲水槽包括耗合於該微電腦控制器 的-第三溫度感測器及—第二加熱器，該第三溫度感測器用以感 測該儲水射的水H溫度，該第三溫度等於或低於該第二 溫度’且其中該微電腦控㈣根據接收的該第三溫度的訊號以控 制該第二加熱器的該輸出瓦數。 本發明的再一構想為該電熱水器還包括：一進水口； 一出水 :，用以·來自該儲水槽且具有—第四溫度的水，該第四溫度 等於或低㈣第三溫度；一第三加熱器；以及_第四溫度感測 器’設置於該出水口 ’並耦合於該微電腦控制器，其中該第四溫 度感測器將該第四溫度的訊號傳送至該微電腦控㈣，該微電腦 控制器再控繼第三域㈣該輸出瓦數。 該加熱器數量取決於冷水管線與熱水管線的長度以及電熱 201213751 水器所在的氣候’例如寒冷地區所設置的加熱器數量比溫帶/熱 帶地區多。而且加熱器的輸出瓦數可為相同或不同，藉以組合出 適當的輸出功率。 【實施方式】201213751 VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to an electric water heater, and more particularly to an intelligent energy-saving electric water heater. [Prior Art] The existing electric water heaters are classified into storage type electric water heaters and instant electric water heaters. The water storage type electric water heater stores the hot water in a water storage tank, and the user opens the water tap to mix the hot water and the cold water into warm water of moderate temperature. The disadvantage is that when the water temperature in the water storage tank is lower than a threshold, the electric water heater will start the heating line in the water storage tank to heat the water to the rated temperature 'for example, 65 ° C ' or to drain the water to the storage tank and heat it with the heater. After that, it will be returned to the water storage tank, which will consume electric energy and increase the electricity cost, and the outside of the water storage tank needs to be covered with a plurality of layers of heat insulating materials. In addition, other types of water storage type electric water heaters set the temperature of the residual water tank to a fixed temperature, for example, 65 at any time, regardless of the seasons. [, and set the ageing line in the water storage tank, the thief is heated by cold water, the considerable amount of electricity and water and the poor heat cycle effect. In the case of instant electric water heaters, when the faucet is turned on, a large amount of electric power is required to heat the cold water instantaneously, and the amount of hot water is also small, which not only consumes a large amount of electric energy, but also does not provide sufficient hot water. Therefore, the development of electric water heating technology with reduced power consumption, storage of sufficient amount of hot water, and instant hot water has become an improved electric water heating target. ', 【Contents of the Invention】 Heater St1) Set more than one heater (2) with the same or different output wattage to set the material with different temperature sensor side devices (4) (four) age device 201213751 ^ according to the four seasons The cold water temperature is different, and the temperature of the water storage tank or the output power of the dancer is automatically set. For example, the summer can be set to 35T, the spring and autumn can be set to 38Τ, the winter: set to 55Τ, etc. to heat the cold water into hot water and store it in In the water storage tank, the heated hot water can then be directly discharged from the water outlet, so that the water heater of the invention has both the water type and the electric water heater, and overcomes the shortage of the two electric water heaters. The first concept of the present invention is an electric water heater comprising: more than one heater, each of the heaters having a mutual phase output wattage, the water being added to the water having the first temperature; a water storage tank for storing the water having a first temperature, a first temperature sensor for sensing the first temperature of the water; and a microcomputer controller for combining the first temperature sensor for Receiving the signal of the first temperature and controlling the output wattage of at least one of the heaters. Another aspect of the present invention contemplates that the electric water heater further includes a second temperature sensor that is coupled to the second temperature, the second temperature, and the second temperature at which the rib turns over. A further concept of the present month is that the water storage tank includes a third temperature sensor and a second heater that are consumed by the microcomputer controller, and the third temperature sensor is configured to sense the water of the water storage. H temperature, the third temperature is equal to or lower than the second temperature 'and wherein the microcomputer controls (4) the signal according to the received third temperature to control the output wattage of the second heater. Still another aspect of the present invention is that the electric water heater further includes: a water inlet; an outlet water: water from the water storage tank and having a fourth temperature, the fourth temperature being equal to or lower (four) third temperature; a third heater; and a fourth temperature sensor is disposed at the water outlet and coupled to the microcomputer controller, wherein the fourth temperature sensor transmits the signal of the fourth temperature to the microcomputer (four), The microcomputer controller re-controls the output wattage following the third domain (four). The number of heaters depends on the length of the cold and hot water lines and the heat. 201213751 The climate in which the water is located. For example, there are more heaters in the cold regions than in the temperate/hot belt regions. Moreover, the output wattage of the heaters can be the same or different, thereby combining the appropriate output power. [Embodiment]
本案所提出之「智慧型節能電熱水器」將可由以下的實施例 說明而得到充分瞭解，使得熟習本技藝之人士可以據以完成之， 然而本案之實施並非可由下列實施例而被限制其實施型態，熟習 本技藝之人士仍可依據除既揭露之實施例的精神推演出其他實 施例’該等實施例皆當屬於本發明之範圍。 請參閱第1圖，其為本發明電熱水器的第一實施例之示意 圖’該電熱水器係包含一第一加熱器i、一第二加熱器12、一儲 水槽2、一第一溫度感測器6b、一第三溫度感測If 6c以及-微 電腦控制器3，該第-加熱器卜第二加熱器12係具互不相同的 輸出瓦數’在第1 ®巾’冷水由進水σ4進人電熱水^的冷水管 線10 ’由加熱H 1將冷水加熱為熱水，而設置於冷水管線⑺末 端的第-溫度感測H 6b可絲感測水溫度，此為水之第一溫产； 熱水可儲麵财槽2，_置_讀2邮三溫賴 =測該熱水溫度，此為水之第三溫度，第一溫度感測器此以 Stitt職6e分戰合至微賴控制113，因此«腦控 =號蚊所要開啟的第-加熱器丨或第二加熱器 和疋的加熱器之輸出功率，將冷水管線1G内 成 數一是該 冷水從進水口 4進入到冷水管線1〇後，經由第一加熱器i 201213751 加熱成為具有一第一溫度的熱水，接著進入到儲水槽2進行儲 存，因此該儲水槽2的熱水溫度基本上應等於該第一溫度，此外， 儲水槽2還可依需要設置第二加熱器12,以便對儲水槽的熱水進 行加熱保溫，當第三溫度感測器6C感測到儲水槽2的溫度低於 該第一溫度時，第二加熱器12即啟動加熱以使該儲水槽2維持 在該第一溫度’使得熱水從出水口 5流出時之水溫可與第一溫度 相同，不會輸出低於第一溫度之熱水。 本發明的電熱水器並可在進水口 4設置第一水流量感測器 7a，以決定是否啟動第一加熱器丨將冷水加熱為熱水；當第一水 流量感測器7a感測到水量為零時，微電腦控制器3根據該第一 水流量感測器7a的訊號不啟動第一加熱器丨，因為沒有水量如啟 動加熱器會有加熱器空燒或毀損的可能，因此感測到水量為零 時，微電腦控制器3將會關閉該第一加熱器i的運作，以防危險 發生，或者，當第一水流量感測器7a感測到有水量時，微電腦 控制器3根據第一水流量感測器7a的訊號啟動第一加熱器i或 第二加熱器12，以加熱冷水，並且將熱水儲存於儲水槽2，同時 儲水槽2内的熱水由排水口 5排出，如此一來可讓使用者隨時隨 地享受到熱水’也就是說本發明的電熱水器同時具有儲水式以及 即熱式電熱水器的功能’同時改善了：^前技術所述之缺失。 儲水槽2外侧並可設置一個耦合於第三溫度感測器&的顯 示器9，其顯示儲水槽2内的熱水溫度，且本領域的技術人士亦 可根據設計要求將進水口 4、冷水管線1〇、第一加熱器丨、第一 水流量感測器7a及第-溫度感測器6b設置於儲水槽2的内膽外 圍。 請參閱第2圖，其為本發明電熱水器的第二實施例示意圖， 除了包含前述之第-實施例之树外，本發明之第二實施^電 201213751 熱水器更包含了-第三加熱器13、一第二溫度感測器如及 四溫度感_ 6d，魅溫度感測n 6a、6b、&以及6d分 至微電腦控制器3，該些加熱器卜12、13係具互不相同的輸二 瓦數邮2 ®中，冷水由進水口 4進人電熱水器的冷水管線1〇, 第一溫度感測器6a可用來偵測冷水溫度。 冷水由進水口 4進入電熱水器的冷水管線1〇，由第一加熱器 1將冷水加鱗熱水’而設置於冷水管線1〇末端的第一溫^測 器6b可用來感測熱水溫度，當然微電腦控制器3可根據該些溫 • 度感測器6a、6b感測到的溫度來進行比較，來決定第一加熱器^ 之輸出功率；加熱後的熱水儲存於儲水槽2，而設置於儲水槽2 的第二溫度感測器6c可用來感測熱水溫度，因此微電腦控制器3 根據第一溫度感測器6b與第三溫度感測器6c所感測到的溫度來 決定所要開啟的第二加熱器12輸出功率，使得儲水槽2内^熱 水溫度達到額定溫度’儲水槽2的熱水於使用時可由出水口 5流 出；出水口並可依需要設置第四溫度感測器6d以及第三加熱器 13，第四溫度感測器6d可偵測流出的熱水溫度，微電腦控制器 _ 可根據第四溫度感測器6d決定所要開啟的第三加熱器13輸出功 率，使出水口 5流出的熱水達額定溫度，可避免該熱水因輸送過 程中散熱而降溫。 由於溫度感測器6a、6b、6c以及6d分別耦合至微電腦控制 器3 ’因此微電腦控制器3可控制該些加熱器的輸出瓦數，使被 指定的加熱器輸出功率將水加熱。 在本實施例中的電熱水器並可在進水口 4設置第一水流量感 測器7a，以決定是否啟動該第一加熱器丨將冷水加熱為熱水；當 第一水流量感測器7a感測到水量為零時，微電腦控制器3根據 -該第一水流量感測器7a的訊號不啟動第一加熱器1，因為沒有水 201213751 量如啟動加熱器會有加熱器空捷或毀損的可㉟，因此感測 為零時，微電腦控制|| 3將會麵該第—加熱器1的運作 危險發生。 儲水槽外側並可設置-個麵合於第三溫度感測器6c的顯示 器9，其顯示儲水槽内的熱水溫度，且本領域峨術人士亦可根 據設計要求將進水口 4、冷水管線1G、第—加鐘卜溫度感測 器6a、6b及第一水流量感測器7a設置於儲水槽2的内膽外圍， 以減少本發明之電熱水器之放置空間，增加使用效益。 凊參閱第3圖，其為本發明電熱水器的第三實施例示意圖， 本第二實施顺前述第—、第二實施例獨在於，本第三實施例 除了前述元件外’更包含了第二水流量感測器7b的設置，且該 第-加熱ϋ可為多個加熱H(la、lb、le)所組成，本發明並不限 定第-加熱器的組成個數，在第3圖中，冷水由進水口 4進入電 熱水器的冷水管線1()，第二溫度感· 6a可用來偵測冷水溫 度’由微電腦控糖3根據第二溫度感測|| 6a來決定開起第一 加熱器(la、lb、1C)之輸出功率，可將冷水加熱為熱水，此外， 本發明的電熱水器還可依需要設置水流量感測器，例如第一水流 量感測器7a或第二水流量感· 7b，可分別被設置於進水口’* 及出水口 5 ;當第-水流量感· 7a感酬冷水通過進水口 4 的流速降鱗，表示單辦間的水流脸低，需較低輸出瓦數將 冷水加熱至-敏溫度，第-絲量感湘7a將水流量訊號傳 送至微電腦控制器3 ’微電腦控制器3再啟動較低輸出瓦數的加 熱器，或者將更低輸出瓦數的多個加熱器組合以輸出等效的輸出 瓦數，反之，當第一水流量感測器7a感測到冷水流速較高時， 微電，控制H根據較高賴量的城及較高輸出瓦數的要求，啟 動較尚輸出瓦數的加熱器，或者將較低輸出瓦數的多個加熱器組 201213751 。以輸出等效的輪出瓦數’將冷水加熱至額定溫度；而當第一水 流量感測器7a或第二水流量感測器7b感測到水量為零時，微電 腦控制器3將會關閉該些加熱器的運作，以防危險發生。 而第二水流量感測器7b將水流量訊號傳送至微電腦控制器 3 ’微電腦控制器3計算出儲水槽2的剩餘水量，並根據儲水槽2 的水溫決定所欲啟動的加熱器及其組合，以將冷水加熱。 儲水槽外側並可設置一個耦合於第三溫度感測器6c的顯示 器9，其顯示儲水槽内的熱水溫度。本領域的技術人士亦可根據 φ 設計要求將進水口 4、冷水管線10、第一加熱器(ia、lb、lc)、 溫度感測器6a、6b及第一水流量感測器7a設置於儲水槽2的内 膽外圍。 藉由第二溫度感測器6a的設置，可依照四季之冷水溫度的 不同，自動设定儲水槽溫度或加熱器之輸出功率，如夏天環境水 溫為20〜4〇°C時，儲水槽2設定的熱水額定溫度為35〇c，微電 胳控制器3根據第二溫度感測$ 6a的訊號啟動第一加熱器❿、 lb、lc)以提供3K瓦的輸出功率’將環境水溫加熱為35〇c熱水 並儲存於儲水槽2 ;如春秋環境水溫為18〜25。(：時，儲水槽2設 定的熱水額定溫度為38。<：，，微電腦控制器3根據第二溫度感 測器6a的訊號啟動該第-加熱器(la、比、⑹以提供4κ瓦的輸 出功率，將環境水溫加熱為38〇c熱水並儲存於儲水槽2 ;如冬 天環境水溫S 1〜，其巾，#環境水溫在時，儲水槽2 設定的熱水額定溫度為6GT ;當職水溫在6〜9〇c時，儲水槽2 設定的熱水額定溫絲5代；t魏水溫在1G〜17χ時，儲水 槽2設定的熱水額定溫度為蚁；微電腦控制器3根據第二溫 度感測器6a的訊號啟動該第—加熱器加、lb、6K瓦 的輸出功率，將環境水溫加熱為額定溫度熱水並儲存於儲水槽 201213751 2，因此第二溫度感測器6a的設置，可提供該電熱水器之微電腦 控制器3作為第一加熱器(ia、lb、lc)之輸出功率設置的參考， 換言之’依照四季之冷水溫度的不同，可自動設定儲水槽2溫度 或設定第一加熱器(la、lb、lc)之輸出功率’故可有效的節省電 源、降低電能消耗而不造成電力的浪費。 本發明實屬難能的創新發明，深具產業價值，援依法提出申 請。此外，本發明可以由本領域技術人員做任何修改，但不脫離 如所附權利要求所要保護的範圍。 【圖式簡單說明】 第1圖為本發明電熱水器的第一實施例之示意圖； 第2圖為本發明電熱水器的第二實施例之示意圖； 第3圖為本發明電熱水器的第三實施例之示意圖。 201213751 【主要元件符號說明】 1、la、lb、lc 第一加熱器 12 第二加熱器 13 第三加熱器 2 儲水槽 3 微電腦控制器 4 進水口 5 出水口 6a 第二溫度感測器 6b 第一溫度感測器 6c 第三溫度感測器 6d 第四溫度感測 7a 第一水流量感測器 7b 第二水流量感測器 9 顯示器 10 冷水管線 11 熱水管線 11The "smart energy-saving electric water heater" proposed in the present application will be fully understood from the following examples, so that those skilled in the art can complete it. However, the implementation of the present invention may not be limited by the following embodiments. Other embodiments of the present invention can be derived from the spirit of the embodiments disclosed herein. The embodiments are intended to be within the scope of the invention. Please refer to FIG. 1 , which is a schematic diagram of a first embodiment of an electric water heater according to the present invention. The electric water heater includes a first heater i, a second heater 12 , a water storage tank 2 , and a first temperature sensing. 6b, a third temperature sensing If 6c and - microcomputer controller 3, the first heater second heater 12 is different from the output wattage 'in the 1st towel 'cold water from the water σ4 The cold water line 10' entering the electric hot water is heated by the H1 to the hot water, and the first temperature sensing H6b disposed at the end of the cold water line (7) can sense the water temperature, which is the first temperature of the water. Production; hot water can be stored in the Treasury 2, _ set _ read 2 post three temperature 赖 = measure the hot water temperature, this is the third temperature of water, the first temperature sensor this Stitt job 6e points to The micro-laid control 113, therefore, the output power of the first heater 丨 or the second heater and the 疋 heater to be turned on by the brain control = mosquito, the number of the cold water pipeline 1G is one, the cold water enters from the water inlet 4 After the cold water line is 1 ,, it is heated to a hot water having a first temperature via the first heater i 201213751, and then enters The water tank 2 is stored, so the hot water temperature of the water storage tank 2 should be substantially equal to the first temperature. In addition, the water storage tank 2 can also be provided with a second heater 12 as needed to heat and heat the hot water of the water storage tank. When the third temperature sensor 6C senses that the temperature of the water storage tank 2 is lower than the first temperature, the second heater 12 starts heating to maintain the water storage tank 2 at the first temperature 'so that the hot water is discharged When the nozzle 5 flows out, the water temperature can be the same as the first temperature, and the hot water lower than the first temperature is not output. The electric water heater of the present invention can be provided with a first water flow sensor 7a at the water inlet 4 to decide whether to activate the first heater 加热 to heat the cold water to hot water; when the first water flow sensor 7a senses the amount of water When it is zero, the microcomputer controller 3 does not activate the first heater 根据 according to the signal of the first water flow sensor 7a, because there is no possibility that the amount of water, such as starting the heater, may cause the heater to burn or be destroyed, so that it is sensed. When the amount of water is zero, the microcomputer controller 3 will turn off the operation of the first heater i to prevent danger from occurring, or, when the first water flow sensor 7a senses the amount of water, the microcomputer controller 3 according to the The signal of the one water flow sensor 7a activates the first heater i or the second heater 12 to heat the cold water, and stores the hot water in the water storage tank 2, while the hot water in the water storage tank 2 is discharged by the drain port 5, In this way, the user can enjoy the hot water anytime and anywhere. That is to say, the electric water heater of the present invention has both the function of the water storage type and the instant electric water heater, and at the same time, the lack of the prior art is improved. The outside of the water storage tank 2 may be provided with a display 9 coupled to the third temperature sensor &amp; which displays the temperature of the hot water in the water storage tank 2, and the person skilled in the art may also add the water inlet 4 and the cold water according to the design requirements. The line 1, the first heater 丨, the first water flow sensor 7a, and the first temperature sensor 6b are disposed at the periphery of the inner tank of the water storage tank 2. Please refer to FIG. 2, which is a schematic diagram of a second embodiment of the electric water heater of the present invention. In addition to the tree including the foregoing first embodiment, the second embodiment of the present invention further includes a third heater 13 a second temperature sensor such as four temperature senses _ 6d, charm temperature sensing n 6a, 6b, & and 6d points to the microcomputer controller 3, the heaters 12, 13 are different from each other In the second wattage mail 2 ® , the cold water enters the cold water line of the electric water heater from the water inlet 4, and the first temperature sensor 6a can be used to detect the cold water temperature. The cold water enters the cold water line of the electric water heater from the water inlet 4, and the first heater 1 adds the cold water to the hot water. The first temperature detector 6b disposed at the end of the cold water line 1b can be used to sense the hot water temperature. , of course, the microcomputer controller 3 can compare the temperatures sensed by the temperature sensors 6a, 6b to determine the output power of the first heater ^; the heated hot water is stored in the water storage tank 2, The second temperature sensor 6c disposed in the water storage tank 2 can be used to sense the hot water temperature, so the microcomputer controller 3 determines according to the temperature sensed by the first temperature sensor 6b and the third temperature sensor 6c. The output power of the second heater 12 to be turned on is such that the hot water temperature in the water storage tank 2 reaches the rated temperature. The hot water of the water storage tank 2 can be discharged from the water outlet 5 during use; the water outlet can be provided with a fourth temperature sense as needed. The detector 6d and the third heater 13, the fourth temperature sensor 6d can detect the temperature of the hot water flowing out, and the microcomputer controller_ can determine the output power of the third heater 13 to be turned on according to the fourth temperature sensor 6d. , the hot water flowing out of the water outlet 5 Rated temperature, the hot water can be avoided due to the heat transport through the cooling process. Since the temperature sensors 6a, 6b, 6c, and 6d are respectively coupled to the microcomputer controller 3', the microcomputer controller 3 can control the output wattage of the heaters so that the specified heater output power heats the water. The electric water heater in this embodiment may be provided with a first water flow sensor 7a at the water inlet 4 to decide whether to activate the first heater 加热 to heat the cold water to hot water; when the first water flow sensor 7a When the amount of water is sensed to be zero, the microcomputer controller 3 does not activate the first heater 1 according to the signal of the first water flow sensor 7a, because there is no water 201213751, such as starting the heater, the heater may be empty or damaged. Can be 35, so when the sensing is zero, the microcomputer control || 3 will face the first - the operational danger of the heater 1 occurs. The outside of the water storage tank can be provided with a display 9 facing the third temperature sensor 6c, which displays the temperature of the hot water in the water storage tank, and the artisan can also inject the water inlet 4 and the cold water pipeline according to the design requirements. The 1G, the first-plus-temperature sensor 6a, 6b and the first water flow sensor 7a are disposed at the periphery of the inner tank of the water storage tank 2 to reduce the space for placing the electric water heater of the present invention and to increase the use efficiency. Referring to FIG. 3, which is a schematic view of a third embodiment of the electric water heater of the present invention, the second embodiment is in addition to the foregoing first embodiment, and the second embodiment is independent of the foregoing components. The water flow sensor 7b is disposed, and the first heating enthalpy may be composed of a plurality of heatings H (la, lb, le), and the present invention does not limit the number of components of the first heater, in FIG. The cold water enters the cold water pipeline 1 () of the electric water heater from the water inlet 4, and the second temperature sense 6a can be used to detect the cold water temperature. The micro-computer control sugar 3 determines the first heating according to the second temperature sensing || The output power of the device (la, lb, 1C) can heat the cold water to hot water. In addition, the electric water heater of the present invention can also be provided with a water flow sensor, such as a first water flow sensor 7a or a second. The water flow sense · 7b can be set at the water inlet '* and the water outlet 5 respectively; when the first water flow sense · 7a feels the flow rate of the cold water through the water inlet 4 is reduced, indicating that the water flow between the single office is low, The lower output wattage will heat the cold water to the -min temperature, and the first-filament amount will be 7a to the water flow signal. Send to the microcomputer controller 3 'Microcomputer controller 3 restarts the heater with lower output wattage, or combines multiple heaters with lower output wattage to output the equivalent output wattage, and vice versa when the first water When the flow sensor 7a senses that the cold water flow rate is high, the micro-electricity controls the H to start the heater with a higher output wattage according to the higher demand of the city and the higher output wattage, or lower the output. Watt number of multiple heater groups 201213751. The cold water is heated to the rated temperature by outputting the equivalent wheel wattage'; and when the first water flow sensor 7a or the second water flow sensor 7b senses that the amount of water is zero, the microcomputer controller 3 will Turn off the operation of these heaters to prevent danger. The second water flow sensor 7b transmits the water flow signal to the microcomputer controller 3 'the microcomputer controller 3 calculates the remaining water amount of the water storage tank 2, and determines the heater to be activated according to the water temperature of the water storage tank 2 Combine to heat cold water. Outside the water storage tank, a display 9 coupled to the third temperature sensor 6c is provided, which displays the temperature of the hot water in the water storage tank. A person skilled in the art can also set the water inlet 4, the cold water line 10, the first heater (ia, lb, lc), the temperature sensors 6a, 6b and the first water flow sensor 7a according to the φ design requirement. The outer periphery of the tank of the water storage tank 2. By the setting of the second temperature sensor 6a, the temperature of the water storage tank or the output power of the heater can be automatically set according to the cold water temperature of the four seasons, for example, when the summer ambient water temperature is 20 to 4 〇 ° C, the water storage tank 2 The set hot water temperature is 35〇c, and the micro controller 3 activates the first heater ❿, lb, lc according to the second temperature sensing $6a signal to provide 3K watts of output power. The temperature is heated to 35 〇c hot water and stored in the water storage tank 2; if the spring and autumn environment water temperature is 18~25. (:, the hot water rated temperature set by the water storage tank 2 is 38. <:, the microcomputer controller 3 activates the first heater (la, ratio, (6) to provide 4κ according to the signal of the second temperature sensor 6a. The output power of the tile, the ambient water temperature is heated to 38 〇c hot water and stored in the water storage tank 2; such as the winter ambient water temperature S 1~, its towel, # ambient water temperature, the hot water rating set by the water storage tank 2 The temperature is 6GT; when the working water temperature is 6~9〇c, the hot water rated temperature wire set by the water storage tank 2 is 5 generations; when the Wei water temperature is 1G~17χ, the hot water rated temperature set by the water storage tank 2 is ant; The controller 3 activates the output power of the first heater plus lb, 6K watt according to the signal of the second temperature sensor 6a, heats the ambient water temperature to the rated temperature hot water and stores it in the water storage tank 201213751 2, so the second The setting of the temperature sensor 6a can provide the microcomputer controller 3 of the electric water heater as a reference for the output power setting of the first heater (ia, lb, lc). In other words, it can be automatically set according to the cold water temperature of the four seasons. The temperature of the water storage tank 2 or the output of the first heater (la, lb, lc) The rate can effectively save power and reduce power consumption without causing waste of power. The invention is a versatile innovative invention, and has industrial value, and is applied in accordance with the law. Moreover, the present invention can be made by any person skilled in the art. Modifications, but without departing from the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a first embodiment of an electric water heater of the present invention; FIG. 2 is a second embodiment of the electric water heater of the present invention Fig. 3 is a schematic view showing a third embodiment of the electric water heater of the present invention. 201213751 [Description of main components] 1. la, lb, lc first heater 12 second heater 13 third heater 2 water storage tank 3 microcomputer controller 4 water inlet 5 water outlet 6a second temperature sensor 6b first temperature sensor 6c third temperature sensor 6d fourth temperature sensing 7a first water flow sensor 7b second water flow Sensor 9 display 10 cold water line 11 hot water line 11