TW201516355A - Water heater and dry-boiling prevention device and method for the water heater - Google Patents

Water heater and dry-boiling prevention device and method for the water heater Download PDF

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Publication number
TW201516355A
TW201516355A TW102137714A TW102137714A TW201516355A TW 201516355 A TW201516355 A TW 201516355A TW 102137714 A TW102137714 A TW 102137714A TW 102137714 A TW102137714 A TW 102137714A TW 201516355 A TW201516355 A TW 201516355A
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Taiwan
Prior art keywords
water
water pipe
detector
water heater
resistance value
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TW102137714A
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Chinese (zh)
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TWI551835B (en
Inventor
Chung-Chin Huang
Chin-Ying Huang
Hsin-Ming Huang
Hsing-Hsiung Huang
Yen-Jen Yeh
Kuan-Chou Lin
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Grand Mate Co Ltd
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Priority to TW102137714A priority Critical patent/TWI551835B/en
Priority to US14/260,669 priority patent/US20150107534A1/en
Publication of TW201516355A publication Critical patent/TW201516355A/en
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Publication of TWI551835B publication Critical patent/TWI551835B/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • F24H15/132—Preventing the operation of water heaters with low water levels, e.g. dry-firing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/18—Measuring temperature feedwater temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

A water heater includes a water pipe, a heating unit, and a dry-boiling prevention device. The water pipe is provided for injecting water. The heating unit is provided for heating the water pipe. The dry-boiling prevention device includes a first detector and a controller. The first detector detects the resistance value of the fluid in the water pipe. While the resistance value detected by the first detector is greater than a predetermined resistance value and is maintained for a predetermined period, the controller determines that there is a great amount of air passing through the water pipe. In the meantime, the controller controls the heating unit to stop heating. Accordingly, it is able to prevent a great amount of air from entering the water pipe, which may cause dry boiling in the water pipe.

Description

熱水器以及用於熱水器的防空燒裝置與防空燒方 法 Water heater and anti-air burning device for water heater and anti-air burning law

本發明係與熱水器有關，特別是關於一種具有防空燒效果的熱水器以及用於熱水器的防空燒裝置與防空燒方法。 The invention relates to a water heater, in particular to a water heater with an anti-air burning effect, an anti-air burning device for a water heater and an anti-air burning method.

習用的熱水器包含有一輸水管、一加熱單元、一水流偵測器與一控制器。該輸水管一端連接至一供水的水管，另一端連接到一水龍頭。該加熱單元用以加熱該輸水管，該水流偵測器用以偵測該輸水管內的水流狀態。當該水龍頭被打開後，該水流偵測器偵測到該輸水管內的水開始流動後，該控制器即啟動該加熱單元加熱該輸水管，使該熱水器輸出熱水。 The conventional water heater comprises a water pipe, a heating unit, a water flow detector and a controller. The water pipe is connected at one end to a water supply pipe and at the other end to a faucet. The heating unit is configured to heat the water pipe, and the water flow detector is configured to detect a state of water flow in the water pipe. After the faucet is opened, the water flow detector detects that the water in the water pipe starts to flow, the controller starts the heating unit to heat the water pipe, so that the water heater outputs hot water.

然，在特定情況下，如停水過後，該水管內可能會蓄積空氣，當使用者將該水龍頭打開後，空氣通過該水流偵測器時，亦會帶動該水流偵測器作動而造成該控制器誤判該輸水管內有水流動，因此該控制器仍會啟動該加熱單元加熱。由於該輸水管內實際上沒有水存在，此將造成該輸水管持續受熱空燒而損壞，或是突然有水注入該輸水管，注入的水通過高溫的輸水管時，產生蒸氣自該水龍頭竄出，而傷及使用者。是以，習用的熱水器之設計仍未臻完善，尚有待改進之處。 However, under certain circumstances, if water is stopped, air may accumulate in the water pipe. When the user opens the faucet, when the air passes through the water flow detector, the water flow detector is also activated to cause the The controller misjudges the flow of water in the water pipe, so the controller will still start heating the heating unit. Since there is actually no water in the water pipe, the water pipe will continue to be damaged by the hot air, or suddenly water will be injected into the water pipe. When the injected water passes through the high temperature water pipe, steam is generated from the water tap. Out, and hurt the user. Therefore, the design of the conventional water heater is still not perfect, and there is still room for improvement.

本發明之主要發明目的在於提供一種熱水器以 及用於熱水器的防空燒裝置與防空燒方法，可判斷輸水管通過的流體是空氣或水，並在判斷流體為空氣後停止加熱。 The main object of the present invention is to provide a water heater And the anti-air-burning device and the anti-air-burning method for the water heater, it can be judged that the fluid passing through the water pipe is air or water, and stops heating after judging that the fluid is air.

為達成前述之發明目的，本發明所提供之熱水 器，包含有一輸水管、一加熱單元、一第一偵測器與一控制器，其中，該加熱單元用以加熱該輸水管；該第一偵測器設置於該輸水管，用以偵測該輸水管內的該流體之電阻值；該控制器電性連接該第一偵測器，該控制器在該第一偵測器測得的電阻值大於一預定電阻並維持經過一預定時間後，控制停止該加熱單元加熱。 In order to achieve the aforementioned object of the invention, the hot water provided by the present invention The device includes a water pipe, a heating unit, a first detector and a controller, wherein the heating unit is configured to heat the water pipe; the first detector is disposed on the water pipe for detecting The resistance value of the fluid in the water pipe; the controller is electrically connected to the first detector, and the controller measures the resistance value of the first detector to be greater than a predetermined resistance and maintains after a predetermined time The control stops the heating of the heating unit.

本發明所提供之用於熱水器的防空燒裝置，該熱 水器包括一輸水管，該防空燒裝置包含有一第一偵測器與一控制器，其中，該第一偵測器設置於該輸水管上，該第一偵測器偵測該輸水管內之流體的電阻值；該控制器電性連接該第一偵測器，該控制器在該第一偵測器測得的電阻值大於一預定電阻值並維持經過一預定時間後，控制停止該熱水器加熱。 The anti-air burning device for water heater provided by the invention, the heat The water heater includes a water pipe, the air-defense device includes a first detector and a controller, wherein the first detector is disposed on the water pipe, and the first detector detects the water pipe a resistance value of the fluid; the controller is electrically connected to the first detector, and the controller stops the control after the resistance value measured by the first detector is greater than a predetermined resistance value and is maintained for a predetermined time The water heater is heated.

本發明更提供一種用於熱水器的防空燒方法，該 熱水器包括一輸水管，該防空燒方法包含有下列步驟：偵測該輸水管內的流體之電阻值；以及在所偵測的該流體之電阻值高於一預定電阻值並維持經過一預定時間後，停止該熱水器加熱。 The invention further provides an anti-air burning method for a water heater, The water heater includes a water pipe, and the air-defense method includes the steps of: detecting a resistance value of the fluid in the water pipe; and maintaining a resistance value of the fluid higher than a predetermined resistance value and maintaining a predetermined time After that, stop the water heater heating.

藉此，透過該熱水器、防空燒裝置與防空燒方法，可有效避免熱水器發生空燒的情形。 Thereby, through the water heater, the anti-air burning device and the anti-air burning method, the situation that the water heater is air-burned can be effectively avoided.

10‧‧‧輸水管 10‧‧‧Water pipes

12‧‧‧入水管 12‧‧‧Water inlet

14‧‧‧加熱管 14‧‧‧heat pipe

16‧‧‧出水管 16‧‧‧Outlet

20‧‧‧加熱單元 20‧‧‧heating unit

22‧‧‧熱交換器 22‧‧‧ heat exchanger

222‧‧‧吸熱片 222‧‧‧heat absorbing film

24‧‧‧燃燒器 24‧‧‧ burner

26‧‧‧瓦斯管路 26‧‧‧ gas pipeline

28‧‧‧瓦斯閥 28‧‧‧ gas valve

30‧‧‧點火器 30‧‧‧Igniter

32‧‧‧偵測模組 32‧‧‧Detection module

322‧‧‧入水溫偵測器 322‧‧‧Into the water temperature detector

324‧‧‧出水溫偵測器 324‧‧‧Water temperature detector

326‧‧‧水流偵測器 326‧‧‧Water Flow Detector

328‧‧‧水偵測器 328‧‧‧Water Detector

328a‧‧‧電極 328a‧‧‧electrode

328b‧‧‧絕緣體 328b‧‧‧Insulator

34‧‧‧控制器 34‧‧‧ Controller

36‧‧‧水龍頭 36‧‧‧Water tap

40‧‧‧水偵測器 40‧‧‧Water Detector

402‧‧‧電極 402‧‧‧electrode

圖1為本發明一較佳實施例之熱水器示意圖。 1 is a schematic view of a water heater according to a preferred embodiment of the present invention.

圖2為本發明一較佳實施例之水偵測器示意圖。 2 is a schematic diagram of a water detector according to a preferred embodiment of the present invention.

圖3為本發明一較佳實施例之防空燒方法流程圖。 3 is a flow chart of an air defense method according to a preferred embodiment of the present invention.

圖4為本發明之水偵測器的另一實施態樣。 Figure 4 is another embodiment of the water detector of the present invention.

為能更清楚地說明本發明，茲舉較佳實施例並配合圖示詳細說明如后。請參閱圖1所示，本發明一較佳實施例之熱水器，包含有一輸水管10、一加熱單元20、一偵測模組32與一控制器34。 In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings. Referring to FIG. 1 , a water heater according to a preferred embodiment of the present invention includes a water pipe 10 , a heating unit 20 , a detecting module 32 and a controller 34 .

該輸水管10為金屬材質製成，包含有相連通的一入水管12、一加熱管14與一出水管16，該入水管12供水注入，所注入的水流經加熱管14自該出水管16輸出，該出水管16連通至一水龍頭36。該加熱單元20包含有一熱交換器22、一燃燒器24、一瓦斯管路26、一瓦斯閥28與一點火器30。該熱交換器22具有複數個吸熱片222，該輸水管10的加熱管14穿過該些吸熱片222，且與該些吸熱片222連接。該燃燒器24位於該熱交換器22下方，該燃燒器24連通該瓦斯管路26，該瓦斯閥28設置於該瓦斯管路26上，本實施例的瓦斯閥28係可受控制導通或阻斷通過的瓦斯、以及調節通過的瓦斯流量。該點火器30設於該燃燒器24附近，用以點燃自該燃燒器24輸出的瓦斯，使該燃燒器24產生火焰以加熱位於其上方的吸熱片222及加熱管14。 The water pipe 10 is made of a metal material and includes a water inlet pipe 12, a heating pipe 14 and an outlet pipe 16, which are connected to each other. The water pipe 12 is supplied with water, and the injected water flows through the heating pipe 14 from the water outlet pipe 16 . The outlet 16 is connected to a faucet 36. The heating unit 20 includes a heat exchanger 22, a burner 24, a gas line 26, a gas valve 28 and an igniter 30. The heat exchanger 22 has a plurality of heat absorbing sheets 222. The heating tubes 14 of the water conduit 10 pass through the heat absorbing sheets 222 and are connected to the heat absorbing sheets 222. The burner 24 is located below the heat exchanger 22, and the burner 24 is connected to the gas line 26, and the gas valve 28 is disposed on the gas line 26. The gas valve 28 of the embodiment can be controlled to conduct or block. Gas passing through, and regulating the flow of gas through. The igniter 30 is disposed adjacent the burner 24 for igniting gas output from the burner 24 to cause the burner 24 to generate a flame to heat the heat absorbing sheet 222 and the heating tube 14 located above it.

該偵測模組包含一入水溫偵測器322、一出水溫偵測器324、一水流偵測器326、一水偵測器328。該入水溫偵測器322設置於該入水管12，用以偵測該入水管12的水溫。該出水溫偵測器324設置於該出水管16，用以偵測該出水管16的水溫。該水流偵測器326及水偵測器328設置於該入水管12，其中該水偵測器328即為本發明定義的第一偵測器，該水流偵測器326即為本發明定義的第二偵測器。該水偵測器328用以偵測該入水管12內流體的電阻值，該水流偵 測器326偵測流經該入水管12的水流量。 The detection module includes a water inlet temperature detector 322, a water temperature detector 324, a water flow detector 326, and a water detector 328. The water inlet temperature detector 322 is disposed on the water inlet pipe 12 for detecting the water temperature of the water inlet pipe 12. The water outlet temperature detector 324 is disposed at the water outlet pipe 16 for detecting the water temperature of the water outlet pipe 16. The water flow detector 326 and the water detector 328 are disposed in the water inlet pipe 12, wherein the water detector 328 is the first detector defined in the present invention, and the water flow detector 326 is defined by the present invention. The second detector. The water detector 328 is configured to detect a resistance value of the fluid in the water inlet pipe 12, and the water flow detection The detector 326 detects the flow of water through the inlet pipe 12.

該控制器34電性連接該點火器30與該瓦斯閥28 與該偵測模組32，該控制器34依據該偵測模組32所測得的入水溫度、出水溫度及水流量計算燃燒器所需的瓦斯量，控制點火器30進行點火、該瓦斯閥開啟瓦斯以及控制該瓦斯閥28調節通過的瓦斯流量，以使出水溫度達到使用者所設定的出水溫度，致於如何控制出水溫度非本發明之重點，於此容不贅述。 The controller 34 is electrically connected to the igniter 30 and the gas valve 28 And the detecting module 32, the controller 34 calculates the amount of gas required by the burner according to the inlet water temperature, the outlet water temperature and the water flow rate measured by the detecting module 32, and controls the igniter 30 to perform ignition, the gas valve Turning on the gas and controlling the gas flow rate of the gas valve 28 to adjust the water output temperature to reach the water temperature set by the user, how to control the water temperature is not the focus of the present invention, and details are not described herein.

請參閱圖2，在本實施例中，該水偵測器328具 有二個電極328a，各該電極328a一端電性連接該控制器34，另一端伸入該入水管12內。該二電極328a相隔一距離，且該二電極328a與入水管12的管壁以絕緣體328b隔離。在本實施例中，該控制器34自其中一電極328a輸入一預定電流，並測量該二電極328a之電壓，如此，利用所測得之電壓與該預定電流計算該二電極328a間的電阻值。當通過該水偵測器328的電極328a之流體為水時，該二電極328a間的電阻值為第一電阻值；當通過的流體為空氣時，該二電極328a間的電阻值將為高於該第一電阻值的第二電阻值，藉此，利用電阻值的不同即可判斷通過入水管12的流體為水或空氣。 Referring to FIG. 2, in the embodiment, the water detector 328 has There are two electrodes 328a, one end of each of the electrodes 328a is electrically connected to the controller 34, and the other end is inserted into the water inlet pipe 12. The two electrodes 328a are separated by a distance, and the two electrodes 328a are separated from the wall of the inlet pipe 12 by an insulator 328b. In this embodiment, the controller 34 inputs a predetermined current from one of the electrodes 328a, and measures the voltage of the two electrodes 328a. Thus, the resistance between the two electrodes 328a is calculated by using the measured voltage and the predetermined current. . When the fluid passing through the electrode 328a of the water detector 328 is water, the resistance between the two electrodes 328a is the first resistance value; when the passing fluid is air, the resistance between the two electrodes 328a will be high. The second resistance value of the first resistance value can be used to determine whether the fluid passing through the water inlet pipe 12 is water or air.

前述的水流偵測器326、水偵測器328及控制器 34則構成本實施例的防空燒裝置，藉由該防空燒裝置即可進行圖3所示之防空燒方法。 The aforementioned water flow detector 326, water detector 328 and controller 34 constitutes the anti-air-burning apparatus of the present embodiment, and the anti-air-burning method shown in FIG. 3 can be performed by the anti-air-burning apparatus.

此外，由於各地區的水中雜質有所不同，水中雜 質將影響水偵測器328所測得的第一電阻值；通過水偵測器328的空氣中亦可能含有水氣，而影響水偵測器328所測得的第二電阻值。為了正確地區分入水管12內的流體為水或空氣，該控制器34內建有一預定電阻值，該預定電阻值係介於該第一電阻值與第二電阻值之間，只要水偵測器328測得的電阻值高於該預定電阻值即判斷流體為空氣，電阻值低於該預定電阻值即判斷流體為水。 In addition, due to differences in water impurities in various regions, water miscellaneous The quality will affect the first resistance value measured by the water detector 328; the air passing through the water detector 328 may also contain moisture, which affects the second resistance value measured by the water detector 328. In order to correctly distinguish the fluid in the water pipe 12 from water or air, the controller 34 has a predetermined resistance value built therein, and the predetermined resistance value is between the first resistance value and the second resistance value, as long as the water is detected. The resistance value measured by the device 328 is higher than the predetermined resistance value, that is, the fluid is judged to be air, and the resistance value is lower than the predetermined resistance value, that is, the fluid is judged to be water.

在實際使用時，可能會有瞬間一小段空氣通過水 偵測器328的電極328a，造成水偵測器328測得的電阻值瞬間升高，但隨即而來水又跟著通過，該水偵測器328測得的電阻值又回復到第一電阻值。為避免此情形造成誤判斷為無水通過，在本實施例中，更設定該水流偵測器326測到流體為流動狀態時，且該水偵測器328測得的電阻值高於該預定電阻值並持續一預定時間後，才判斷為無水狀態。反之，在該水流偵測器326測得流體為流動狀態時，且該水偵測器328測得的電阻值小於該預定電阻值時，則判斷為有水通過之狀態。 In actual use, there may be a short period of air passing through the water. The electrode 328a of the detector 328 causes the resistance value measured by the water detector 328 to rise instantaneously, but then the water then passes, and the resistance value measured by the water detector 328 returns to the first resistance value. . In order to prevent the situation from being misjudged as water-free passage, in the embodiment, the water flow detector 326 is further configured to detect that the fluid is in a flowing state, and the resistance value measured by the water detector 328 is higher than the predetermined resistance. After the value continues for a predetermined period of time, it is judged to be in a waterless state. On the other hand, when the water flow detector 326 detects that the fluid is in a flowing state, and the resistance value measured by the water detector 328 is less than the predetermined resistance value, it is determined that there is a state in which water passes.

在該燃燒器24未點火之前(即使用者剛打開水 龍頭36時)，該輸水管10內的流體(空氣或水)開始流動，若該控制器34判斷為無水狀態時，則該控制器34控制該瓦斯閥28阻斷瓦斯的供給，並且不啟動該點火器30點火。 Before the burner 24 is not ignited (ie, the user just turned on the water) When the faucet 36), the fluid (air or water) in the water pipe 10 starts to flow, and if the controller 34 determines that it is in a waterless state, the controller 34 controls the gas valve 28 to block the supply of gas, and does not start. The igniter 30 is ignited.

在該燃燒器24輸出的瓦斯為引燃的狀態下(即 熱水器正在運作中)，若該控制器34判斷為無水狀態時，則該控制器34控制該瓦斯閥28阻斷供應至該燃燒器24的瓦斯，藉以停止對該熱水器進行加熱，如此，即可避免有大量空氣進入該加熱管14時，該燃燒器24持續對該加熱管14加熱，造成該熱交換器22及加熱管14因高溫而損壞，或產生高溫蒸氣自該水龍頭36竄出。 When the gas output from the burner 24 is ignited (ie, The water heater is in operation. If the controller 34 determines that it is in a waterless state, the controller 34 controls the gas valve 28 to block the gas supplied to the burner 24, thereby stopping the heating of the water heater. When a large amount of air is prevented from entering the heating pipe 14, the burner 24 continues to heat the heating pipe 14, causing the heat exchanger 22 and the heating pipe 14 to be damaged due to high temperature, or generating high temperature steam from the faucet 36.

在實務上，水偵測器亦可設計成如圖4所示之態 樣，該水偵測器40具有一電極402，該電極402伸入入水管12內，該入水管12金屬材質之管壁直接與該控制器34電性連接，如此，該電極402與入水管12的管壁之間同樣可以測得電阻值。 In practice, the water detector can also be designed as shown in Figure 4. The water detector 40 has an electrode 402. The electrode 402 extends into the water inlet pipe 12. The metal wall of the water inlet pipe 12 is directly electrically connected to the controller 34. Thus, the electrode 402 and the water inlet pipe are connected. The resistance value can also be measured between the tube walls of 12.

在一實施例中，防空燒裝置亦可不設置該水流偵 測器326，而直接利用水偵測器328與該預定時間來判斷是否有水通過入水管12。換言之，只要水偵測器328偵測到電阻值高於該預定電阻值並持續該預定時間後，該控制器34即判 斷為無水通過入水管12，則不進行加熱。 In an embodiment, the anti-air burning device may not set the water flow detection The detector 326 directly uses the water detector 328 and the predetermined time to determine whether water passes through the water inlet pipe 12. In other words, the controller 34 determines that the water detector 328 detects that the resistance value is higher than the predetermined resistance value for the predetermined time. When the water is passed through the water inlet pipe 12, no heating is performed.

綜上所述，本發明利用水偵測器偵測輸入熱水器 的流體之電阻值，藉以判斷流入熱水器的流體為水或空氣，並在判斷流體為空氣後停止熱水器進行加熱，有效避免熱水器空燒。此外，上述中係以瓦斯熱水器為例說明，本發明之防空燒裝置亦可應用於電熱水器的防空燒。 In summary, the present invention utilizes a water detector to detect an input water heater The resistance value of the fluid is used to judge whether the fluid flowing into the water heater is water or air, and the water heater is stopped after determining that the fluid is air, thereby effectively avoiding the air heater from burning. In addition, in the above, the gas water heater is taken as an example, and the air-defense burning device of the present invention can also be applied to the air-proof burning of the electric water heater.

以上所述僅為本發明較佳可行實施例而已，舉凡應用本發明說明書及申請專利範圍所為之等效結構變化及等效方法之變化，理應包含在本發明之專利範圍內。 The above description is only for the preferred embodiments of the present invention, and variations of equivalent structures and equivalent methods are intended to be included in the scope of the present invention.

10‧‧‧輸水管 10‧‧‧Water pipes

12‧‧‧入水管 12‧‧‧Water inlet

14‧‧‧加熱管 14‧‧‧heat pipe

16‧‧‧出水管 16‧‧‧Outlet

20‧‧‧加熱單元 20‧‧‧heating unit

22‧‧‧熱交換器 22‧‧‧ heat exchanger

222‧‧‧吸熱片 222‧‧‧heat absorbing film

24‧‧‧燃燒器 24‧‧‧ burner

26‧‧‧瓦斯管路 26‧‧‧ gas pipeline

28‧‧‧瓦斯閥 28‧‧‧ gas valve

30‧‧‧點火器 30‧‧‧Igniter

32‧‧‧偵測模組 32‧‧‧Detection module

322‧‧‧入水溫偵測器 322‧‧‧Into the water temperature detector

324‧‧‧出水溫偵測器 324‧‧‧Water temperature detector

326‧‧‧水流偵測器 326‧‧‧Water Flow Detector

328‧‧‧水偵測器 328‧‧‧Water Detector

34‧‧‧控制器 34‧‧‧ Controller

36‧‧‧水龍頭 36‧‧‧Water tap

Claims (16)

一種用於熱水器的防空燒裝置，該熱水器包括一輸水管，該防空燒裝置包含有：一第一偵測器，設置於該輸水管上，該第一偵測器偵測該輸水管內之流體的電阻值；以及一控制器，電性連接該第一偵測器，該控制器在該第一偵測器測得的電阻值大於一預定電阻值並維持經過一預定時間後，控制停止該熱水器加熱。 An anti-air-burning device for a water heater, the water heater includes a water pipe, the anti-air-burning device includes: a first detector disposed on the water pipe, the first detector detecting the water pipe a resistance value of the fluid; and a controller electrically connected to the first detector, the controller stops when the resistance value measured by the first detector is greater than a predetermined resistance value and is maintained after a predetermined time The water heater is heated. 如請求項1所述之用於熱水器的防空燒裝置，包含有一第二偵測器，設置於該輸水管上，該第二偵測器偵測該輸水管內是否有流體流動，該第二偵測器電性連接該控制器，該控制器在該第二偵測器測得該輸水管內之該流體流動時，且該第一偵測器測得的電阻值大於該預定電阻並維持經過該預定時間後，控制停止該熱水器加熱。 The anti-air-burning device for a water heater according to claim 1, comprising a second detector disposed on the water pipe, the second detector detecting whether there is fluid flow in the water pipe, the second The detector is electrically connected to the controller, and the controller detects the fluid flow in the water pipe when the second detector detects that the resistance value of the first detector is greater than the predetermined resistance and maintains After the predetermined time has elapsed, control stops the heating of the water heater. 如請求項2所述之用於熱水器的防空燒裝置，其中該輸水管包含有一入水管供水注入，該第一偵測器及該第二偵測器設置於該入水管。 The anti-air-burning device for a water heater according to claim 2, wherein the water pipe comprises a water supply pipe for injection, and the first detector and the second detector are disposed on the water inlet pipe. 如請求項1所述之用於熱水器的防空燒裝置，其中該第一偵測器具有二電極，各該電極之一端伸入該輸水管內，另一端電性連接該控制器，該二電極用以偵測該輸水管內該流體的電阻值。 The anti-air-burning device for a water heater according to claim 1, wherein the first detector has two electrodes, one end of each of the electrodes extends into the water pipe, and the other end is electrically connected to the controller, the two electrodes Used to detect the resistance value of the fluid in the water pipe. 如請求項1所述之用於熱水器的防空燒裝置，其中該第一偵測器具有一電極，該電極之一端伸入該輸水管內，另一端電性連接該控制器，該輸水管為金屬材質，該輸水管的 管壁電性連接該控制器，該電極與該輸水管的管壁用以偵測該輸水管內該流體的電阻值。 The anti-air-burning device for a water heater according to claim 1, wherein the first detector has an electrode, one end of the electrode extends into the water pipe, and the other end is electrically connected to the controller, the water pipe is metal Material, the water pipe The tube wall is electrically connected to the controller, and the electrode and the wall of the water pipe are used to detect the resistance value of the fluid in the water pipe. 如請求項1所述之用於熱水器的防空燒裝置，其中該熱水器包含有一瓦斯管路、一燃燒器與一瓦斯閥，該瓦斯管路連通至該燃燒器，該燃燒器用以燃燒瓦斯加熱該輸水管，該瓦斯閥設置於該瓦斯管路上，且該瓦斯閥電性連接該控制器；該控制器係控制該瓦斯閥阻斷供輸至該燃燒器的瓦斯，以停止該熱水器加熱。 The anti-air-burning device for a water heater according to claim 1, wherein the water heater comprises a gas line, a burner and a gas valve, the gas line is connected to the burner, and the burner is used to heat the gas. a water pipe, the gas valve is disposed on the gas pipeline, and the gas valve is electrically connected to the controller; the controller controls the gas valve to block gas supplied to the burner to stop heating of the water heater. 一種熱水器，包含有：一輸水管；一加熱單元，用以加熱該輸水管；一第一偵測器，設置於該輸水管，用以偵測該輸水管內的該流體之電阻值；以及一控制器，電性連接該第一偵測器，該控制器在該第一偵測器測得的電阻值大於一預定電阻並維持經過一預定時間後，控制停止該加熱單元加熱。 A water heater comprising: a water pipe; a heating unit for heating the water pipe; a first detector disposed at the water pipe for detecting a resistance value of the fluid in the water pipe; A controller is electrically connected to the first detector, and the controller stops heating the heating unit after the resistance value measured by the first detector is greater than a predetermined resistance and is maintained for a predetermined time. 如請求項7所述之熱水器，包含有一第二偵測器，設置於該輸水管，用以偵測該輸水管內是否有流體流動；該控制器在該第二偵測器測得該輸水管內的該流體流動時，且該第一偵測器測得的電阻值大於該預定電阻並維持經過該預定時間後，控制停止該加熱單元加熱。 The water heater of claim 7, comprising a second detector disposed on the water pipe for detecting fluid flow in the water pipe; the controller measuring the loss in the second detector When the fluid in the water pipe flows, and the resistance value measured by the first detector is greater than the predetermined resistance and is maintained after the predetermined time, the heating of the heating unit is stopped. 如請求項8所述之熱水器，其中該輸水管包含相連通的一入水管與一加熱管，該入水管供水注入，該加熱單元對該加熱管加熱，該第一偵測器及該第二偵測器設於該入水管。 The water heater of claim 8, wherein the water pipe comprises a water inlet pipe and a heating pipe connected to each other, the water pipe is injected into the water supply, and the heating unit heats the heating pipe, the first detector and the second The detector is located at the water inlet pipe. 如請求項7所述之熱水器，其中該加熱單元包含一瓦斯管路、一燃燒器與一瓦斯閥，該瓦斯管路連通至該燃燒器，該燃燒器用以燃燒瓦斯加熱該輸水管，該瓦斯閥設置於該瓦斯管路上，且該瓦斯閥電性連接該控制器，該控制器係控制該瓦斯閥阻斷供輸至該燃燒器的瓦斯，以停止該加熱單元加熱。 The water heater of claim 7, wherein the heating unit comprises a gas line, a burner and a gas valve, the gas line is connected to the burner, and the burner is used to heat the water pipe by burning the gas. The valve is disposed on the gas pipeline, and the gas valve is electrically connected to the controller, and the controller controls the gas valve to block gas supplied to the burner to stop heating of the heating unit. 如請求項7所述之熱水器，其中該第一偵測器具有二電極，各該電極之一端伸入該輸水管內，另一端電性連接該控制器，該二電極用以偵測該輸水管內該流體的電阻值。 The water heater of claim 7, wherein the first detector has two electrodes, one end of each of the electrodes extends into the water pipe, and the other end is electrically connected to the controller, and the two electrodes are used to detect the input. The resistance of the fluid in the water pipe. 如請求項7所述之熱水器，其中該第一偵測器具有一電極，該電極之一端伸入該輸水管內，另一端電性連接該控制器，該輸水管為金屬材質，該輸水管的管壁電性連接該控制器，該電極與該輸水管的管壁用以偵測該輸水管內該流體的電阻值。 The water heater of claim 7, wherein the first detector has an electrode, one end of the electrode extends into the water pipe, and the other end is electrically connected to the controller, the water pipe is made of metal, and the water pipe is The tube wall is electrically connected to the controller, and the electrode and the wall of the water pipe are used to detect the resistance value of the fluid in the water pipe. 一種用於熱水器的防空燒方法，該熱水器包括一輸水管，該防空燒方法包含有下列步驟：偵測該輸水管內的流體之電阻值；以及在所偵測的該流體之電阻值高於一預定電阻值並維持經過一預定時間後，停止該熱水器加熱。 An anti-air burning method for a water heater, the water heater comprising a water pipe, the air-proof burning method comprising the steps of: detecting a resistance value of a fluid in the water pipe; and detecting a resistance value of the fluid higher than The heater is stopped after a predetermined resistance value is maintained for a predetermined period of time. 如請求項13所述之用於熱水器的防空燒方法，包含有偵測該輸水管內是否有流體流動；在所偵測的該流體流動時，且在所偵測的該流體之電阻值高於該預定電阻值並維持經過該預定時間後，停止該熱水器加熱。 The anti-air-burning method for a water heater according to claim 13, comprising detecting whether there is fluid flow in the water pipe; and detecting the fluid flow, and detecting a high resistance value of the fluid After the predetermined resistance value is maintained and after the predetermined time has elapsed, the heating of the water heater is stopped. 如請求項14所述之用於熱水器的防空燒方法，其中該輸水管包含有一入水管供水注入，該防空燒方法係偵測該入水管內的該流體是否流動，及偵測該入水管內的該流體之電阻值。 The air-defense method for a water heater according to claim 14, wherein the water pipe comprises a water supply pipe for injecting, the air-resistance method detecting whether the fluid in the water pipe flows, and detecting the water pipe The resistance value of the fluid. 如請求項13所述之用於熱水器的防空燒方法，其中該熱水器包含有一燃燒器用以燃燒瓦斯加熱該輸水管；該防空燒方法係阻斷供應至該燃燒器的瓦斯以停止該熱水器加熱。 The anti-air-burning method for a water heater according to claim 13, wherein the water heater comprises a burner for burning the gas to heat the water pipe; and the air-proof burning method blocks the gas supplied to the burner to stop the water heater from heating.
TW102137714A 2013-10-18 2013-10-18 Water heaters and anti-air burners for water heaters TWI551835B (en)

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