US20150107534A1 - Water heater and a method of preventing the water heater from empty boiling - Google Patents
Water heater and a method of preventing the water heater from empty boiling Download PDFInfo
- Publication number
- US20150107534A1 US20150107534A1 US14/260,669 US201414260669A US2015107534A1 US 20150107534 A1 US20150107534 A1 US 20150107534A1 US 201414260669 A US201414260669 A US 201414260669A US 2015107534 A1 US2015107534 A1 US 2015107534A1
- Authority
- US
- United States
- Prior art keywords
- water
- sensor
- resistance
- water pipe
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 238000009835 boiling Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 11
- 230000001012 protector Effects 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 238000001467 acupuncture Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
- 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
- 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
Definitions
- the controller 34 determines that it is air in the water pipe 10 only when the flow sensor 326 detects a water flow, which means the sensed flow rate is not zero, and a resistance obtained by the water sensor 328 is higher than the critical resistance for a predetermined period. On the contrary, the controller 34 determines that it is water in the water pipe 10 when the flow sensor 326 detects a water flow, and a resistance obtained by the water sensor 328 is lower than the critical resistance.
Landscapes
- 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, which includes a water pipe, a combustor, and a dry-boiling protector. The dry-boiling protector includes a first sensor, a second sensor, and a controller. The first sensor senses a resistance of water in the water pipe, and the second sensor senses a flow rate of the water in the water pipe. The controller is electrically connected to the first sensor and the second sensor to stop the combustor to heat water when a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period, and a flow rate sensed by the second sensor is not zero.
Description
- The current application claims a foreign priority to the patent application of Taiwan No.
- 102137714 filed on Oct. 18, 2013.
- 1. Technical Field
- The present invention relates to a water heater, and more particularly to a water heater with a dry-boiling protector, and a method of preventing the water heater from boiling dry.
- 2. Description of Related Art
- Typically, a conventional water heater includes a water pipe, a combustor, a flow sensor, and a controller. The water pipe has an end connected to a water supply, and the other end connected to a faucet. The combustor heats the water in the water pipe, and the flow sensor senses a flow rate of hot water in the water pipe. The flow sensor senses a flow rate of the water in the water pipe when the faucet is opened, and it will give a signal to the controller to start the combustor.
- In some circumstances, such as the water company suspended water, there might be air in the water pipe. In such condition, the controller still starts the combustor when the faucet is opened. However, it only has air, instead of water. in the water pipe, and that would cause “dry-boiling”, which would damage the water pipe. Another problem of “dry-boiling” is that the over-heated pipe will vaporize the water after the air, and team will come out of the faucet suddenly after a short time the user opened the faucet, and sometime the user is hurt by the stem. Therefore, the conventional water is needed to be improved.
- In view of the above, the primary objective of the present invention is to provide a water heater with a dry-boiling protector and a method of preventing the water heater from boiling dry.
- In order to achieve the objective of the present invention, a dry-boiling protector of a water heater includes a first sensor and a controller. The first sensor provided on a water pipe of the water heater to sense a resistance of a fluid in the water pipe; and the controller is electrically connected to the first sensor to stop the water heater to heat water when a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period.
- The present invention further provides a water heater, which includes a water pipe, a combustor, a first sensor, and a controller. The first sensor provided on the water pipe of the water heater to sense a resistance of a fluid in the water pipe; and the controller is electrically connected to the first sensor to stop the combustor to heat the water pipe when a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period.
- The present invention also provides a method of preventing the water heater from boiling dry. The method includes sensing a resistance of a fluid in the water pipe; and stopping heating the fluid when the resistance is higher than a critical resistance for a predetermined period.
- Therefore, the dry-boiling protector of the present invention may prevent the water heater from boiling dry.
- The present invention will be best understood by referring to the following detailed description of some illustrative embodiments in conjunction with the accompanying drawings, in which
-
FIG. 1 is a sketch diagram of the water heater of a preferred embodiment of the present invention; -
FIG. 2 is a sketch diagram of the water sensor of the preferred embodiment of the present invention; -
FIG. 3 is a flow chart of the method of preventing dry-boiling of the preferred embodiment of the present invention; and -
FIG. 4 is a sketch diagram of another water sensor of the preferred embodiment of the present invention. - As shown in
FIG. 1 , a water heater of the preferred embodiment of the present invention includes awater pipe 10, acombustor 20, asensing unit 32, and acontroller 34. - The
water pipe 10 is a metal pipe, having aninput section 12, aheat section 14, and anoutput section 16. Cold water enters thewater pipe 10 via theinput section 12, flows through the heat section 14 (to be heated), and then hot water will come out via theoutput section 16. Afaucet 36 is connected to theoutput section 16 to turn on or off the hot water. Thecombustor 20 has aheat exchanger 22, aburner 24, agas pipe 26, agas valve 28, and anigniter 30. Theheat exchanger 22 has a plurality ofplates 222, and thewater pipe 14 passes through theplates 222 and is in contact with theplates 222. Theburner 24 is under theheat exchanger 22 and is connected to thegas pipe 26. Thegas valve 28 is on thegas pipe 26 to control the gas in thegas pipe 26, including turning on, turning off, increasing and decreasing the gas to theburner 24. Theigniter 30 is beside theburner 24 to light a fire, therefore theburner 24 may heat the water in thewater pipe 10 through theheat exchanger 22. - The
sensing unit 32 includes a coldwater temperature sensor 322, a hotwater temperature sensor 324, aflow sensor 326, and awater sensor 328. The coldwater temperature sensor 322 is provided on theinput section 12 to sense a temperature of the water therein, and the hotwater temperature sensor 324 is provided on theoutput section 16 to sense a temperature of the water therein. Both theflow sensor 326 and thewater sensor 328 are provided on theinput section 12. Thewater sensor 328 is defined as a first sensor, and theflow sensor 326 is defined as a second sensor hereafter. Thewater sensor 328 senses a resistance of the water in theinput section 12, and theflow sensor 326 senses a flow rate. - The
controller 34 is electrically connected to theigniter 30, thegas valve 28, and thesensing unit 32 to control a gas flow to theburner 24 and theigniter 30 according to a cold water temperature, a hot water temperature, and a flow rate of water in thewater pipe 10. The detail of controlling the hot water temperature is not the main feature of the present invention, so we do not describe the detail here. - As shown in
FIG. 2 , thewater sensor 328 has twoelectrodes 328 a, both of which are electrically connected to thecontroller 34. Theelectrodes 328 a are separated from each other, and are suspended in theinput section 12. Aninsulating member 328 b is provided between theelectrodes 328 a and thewater pipe 10 for secure of theelectrodes 328 a and insulation. In an embodiment, an electricity with a constant current is provided to theelectrodes 328 a, and a potential between theelectrodes 328 a is measured, therefore, a resistance may be obtained. If theinput section 12 is filled with water, the resistance should be a first resistance, which is water's resistance, and if theinput section 12 is empty, the resistance should be a second resistance, which is air's resistance. Thecontroller 34 is easy to determine that it's water or it's air in thewater pipe 10 by the resistance sensed by thewater sensor 328. - The
flow sensor 326, thewater sensor 328, and thecontroller 34 constitute a dry-boiling protector of the present invention, and the dry-boiling protector works with a method shown inFIG. 3 . - The first resistance is affected by impurities in the water, and the second resistance is affected by moisture in the air. In order to correctly determine water or air in the
input section 12, a critical resistance, which is higher than the first resistance, and is lower than the second resistance, is pre-stored in thecontroller 34. Thecontroller 34 determines that it is water in theinput section 12 when a resistance obtained by thewater sensor 328 is lower than the critical resistance, and determines that it is air when a resistance obtained by thewater sensor 328 is higher than the critical resistance. - In practice, there might be little water bubbles in the
water pipe 10 only, and that is no harm for heating water. Thecontroller 34 determines that it is air in thewater pipe 10 only when theflow sensor 326 detects a water flow, which means the sensed flow rate is not zero, and a resistance obtained by thewater sensor 328 is higher than the critical resistance for a predetermined period. On the contrary, thecontroller 34 determines that it is water in thewater pipe 10 when theflow sensor 326 detects a water flow, and a resistance obtained by thewater sensor 328 is lower than the critical resistance. - While a user is opening the
faucet 36, the fluid (water or air) in thewater pipe 10 begins to flow, and at the same time, theflow sensor 326 and thewater sensor 328 start to work. If thecontroller 34 determines air in the water pipe 10 (theflow sensor 326 detects a water flow, and thewater sensor 328 detects a resistance higher than the critical resistance), thecontroller 34 closes thegas valve 28 to cut off the gas and idles theigniter 30. - When the
burner 24 is burning gas to heat the water in the water pipe, which means that the water heater is working, and thecontroller 34 determines air in thewater pipe 10, thecontroller 34 closes thegas valve 28 to cut off the gas. It may prevent the water heater from boiling dry to protect theheat exchanger 22 andwater pipe 10 and to avoid steam coming out of thefaucet 36. -
FIG. 4 shows anotherwater sensor 40, which has anelectrode 402 only. Theelectrode 402 is suspended in theinput section 12. Thewater pipe 10 is electrically connected to thecontroller 34 to be the other electrode of thewater sensor 40. A resistance between theelectrode 402 and thewater pipe 10 can be measured to determine water or air in theinput section 12. - In an embodiment, water or air is determined by the
water sensor 328 only without the flow sensor. Thecontroller 34 determines air in thewater pipe 10 when the resistance obtained by thewater sensor 328 is higher than the critical resistance for a predetermined period, and then thecontroller 34 cuts off gas. - In conclusion, the present invention provides the water sensor to sense a resistance which may help the controller to determine it is water or air in the water pipe, and the controller will cut off gas while air is detected to prevent the water heater from boiling dry. The dry-boiling protector of the present invention also may be allied in an electric water heater as well.
- It must be pointed out that the embodiments described above are only some preferred embodiments of the present invention. All equivalent structures which employ the concepts disclosed in this specification and the appended claims should fall within the scope of the present invention.
Claims (16)
1. A dry-boiling protector of a water heater, which the water heater has a water pipe, the dry-boiling protector comprising:
a first sensor provided on the water pipe to sense a resistance of a fluid in the water pipe; and
a controller, which is electrically connected to the first sensor, stopping the water heater to heat water when a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period.
2. The dry-boiling protector of the water heater of claim 1 , further comprising a second sensor provided on the water heater to sense a flow rate of the fluid in the water pipe, wherein the controller stops the water heater to heat water when a flow rate sensed by the second sensor is not zero, and a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period.
3. The dry-boiling protector of the water heater of claim 2 , wherein the water pipe has an input section where cold water enters the water pipe, and both the first sensor and the second sensor are provided on the input section.
4. The dry-boiling protector of the water heater of claim 1 , wherein the first sensor has two electrodes, both of which are electrically connected to the controller and are suspended in the water pipe to sense a resistance between the electrodes.
5. The dry-boiling protector of the water heater of claim 1 , wherein the first sensor has an electrodes, which is electrically connected to the controller and is suspended in the water pipe, and the water pipe is a metal pipe electrically connected to the controller to sense a resistance between the electrode and the water pipe.
6. The dry-boiling protector of the water heater of claim 1 , wherein the water heater further has a gas pipe, a burner, and a gas valve; the gas pipe supplies gas to the burner; the gas valve, which is on the gas pipe, is electrically connected to the controller to cut off the gas in the gas pipe by a command of the controller.
7. A water heater, comprising:
a water pipe;
a combustor for heating the water pipe;
a first sensor provided on the water pipe to sense a resistance of a fluid in the water pipe; and
a controller, which is electrically connected to the first sensor, stopping the combustor when a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period.
8. The water heater of claim 7 , further comprising a second sensor provided on the water heater to sense a flow rate of the fluid in the water pipe, wherein the controller stops the combustor when a flow rate sensed by the second sensor is not zero, and a resistance sensed by the first sensor is higher than a critical resistance for a predetermined period.
9. The water heater of claim 8 , wherein the water pipe has an input section and a heat section connected to the input section; cold water enters the water pipe via the input section; the first sensor and the second sensor are provided on the input section; and the combustor heats the heat section.
10. The water heater of claim 7 , wherein the combustor has a gas pipe, a burner, and a gas valve; the gas pipe supplies gas to the burner; the gas valve, which is on the gas pipe, is electrically connected to the controller to cut off the gas in the gas pipe by a command of the controller.
11. The water heater of claim 7 , wherein the first sensor has two electrodes, both of which are electrically connected to the controller and are suspended in the water pipe to sense a resistance between the electrodes.
12. The water heater of claim 7 , wherein the first sensor has an electrodes, which is electrically connected to the controller and is suspended in the water pipe, and the water pipe is a metal pipe electrically connected to the controller to sense a resistance between the electrode and the water pipe.
13. A method of preventing a water heater from boiling dry, wherein the water heater has a water pipe, the method comprising the steps of:
sensing a resistance of a fluid in the water pipe; and
stopping heating the fluid when the resistance is higher than a critical resistance for a predetermined period.
14. The method of claim 13 , further comprising the step of sensing a flow rate of the fluid in the water pipe, wherein the step of stopping heating the fluid is performed when the flow rate is not zero, and the resistance is higher than a critical resistance for a predetermined period.
15. The method of claim 14 , wherein the water pipe has an input section where cold water enters the water pipe; and the resistance and the flow rate are sensed in the input section.
16. The light acupuncture module of claim 13 , wherein the water heater further includes a combustor, which burns gas to heat the water pipe; and the step of stopping heating the fluid is cutting off the gas to the combustor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW102137714A TWI551835B (en) | 2013-10-18 | 2013-10-18 | Water heaters and anti-air burners for water heaters |
TW102137714 | 2013-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150107534A1 true US20150107534A1 (en) | 2015-04-23 |
Family
ID=52825065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/260,669 Abandoned US20150107534A1 (en) | 2013-10-18 | 2014-04-24 | Water heater and a method of preventing the water heater from empty boiling |
Country Status (2)
Country | Link |
---|---|
US (1) | US20150107534A1 (en) |
TW (1) | TWI551835B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109780732A (en) * | 2019-01-21 | 2019-05-21 | 浙江传福电器有限公司 | Anti-dry instant electric water heater |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737810A (en) * | 1953-12-09 | 1956-03-13 | Continental Oil Co | Electrical resistance thermometer |
US3547145A (en) * | 1966-05-16 | 1970-12-15 | Walter Holzer | Apparatus for sensing levels in containers holding liquids |
US20050150557A1 (en) * | 2004-01-14 | 2005-07-14 | Mcdaniel Jason A. | Capacitive touch on/off control for an automatic residential faucet |
US20050229699A1 (en) * | 2004-04-19 | 2005-10-20 | Chai John Y | Apparatus and methods for monitoring water consumption and filter usage |
US20090085528A1 (en) * | 2006-04-20 | 2009-04-02 | Hironori Yamada | Charging circuit and its charge method |
US20090159017A1 (en) * | 2007-12-19 | 2009-06-25 | Rinnai Corporation | Hot water supply apparatus |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWM246554U (en) * | 2003-11-21 | 2004-10-11 | Wen-Jou Chen | Warning apparatus for gas water heater |
CN201293462Y (en) * | 2008-10-23 | 2009-08-19 | 宁波方太厨具有限公司 | Medium resolving device of water heater |
CN102591242B (en) * | 2012-03-21 | 2014-05-28 | 成都前锋电子有限责任公司 | Monostable protective circuit and automatic control circuit for water heater |
-
2013
- 2013-10-18 TW TW102137714A patent/TWI551835B/en active
-
2014
- 2014-04-24 US US14/260,669 patent/US20150107534A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737810A (en) * | 1953-12-09 | 1956-03-13 | Continental Oil Co | Electrical resistance thermometer |
US3547145A (en) * | 1966-05-16 | 1970-12-15 | Walter Holzer | Apparatus for sensing levels in containers holding liquids |
US20050150557A1 (en) * | 2004-01-14 | 2005-07-14 | Mcdaniel Jason A. | Capacitive touch on/off control for an automatic residential faucet |
US20050229699A1 (en) * | 2004-04-19 | 2005-10-20 | Chai John Y | Apparatus and methods for monitoring water consumption and filter usage |
US20090085528A1 (en) * | 2006-04-20 | 2009-04-02 | Hironori Yamada | Charging circuit and its charge method |
US20090159017A1 (en) * | 2007-12-19 | 2009-06-25 | Rinnai Corporation | Hot water supply apparatus |
Also Published As
Publication number | Publication date |
---|---|
TW201516355A (en) | 2015-05-01 |
TWI551835B (en) | 2016-10-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8322312B2 (en) | Water heater stacking detection and control | |
US8165726B2 (en) | Water heater energy savings algorithm for reducing cold water complaints | |
US10989421B2 (en) | System and approach for water heater comfort and efficiency improvement | |
EP3312523B1 (en) | Gas water heater and safety control system and method therefor | |
CN106361143A (en) | Anti-dry-heating structure and control method for rapid water heating device | |
US20150107534A1 (en) | Water heater and a method of preventing the water heater from empty boiling | |
KR101643867B1 (en) | The initial ignition of the heater control method for stable water supply | |
TWI709720B (en) | System and method for adjusting heating capacity of water heater | |
JP6607375B2 (en) | Auxiliary heat source machine | |
JP5247621B2 (en) | Hot water heating system | |
KR100679818B1 (en) | Device of preventing overheat of boiler and method of preventing thereof | |
KR100918454B1 (en) | Protection circuit for regulator temperature of heating coil | |
US20180363949A1 (en) | Safety system for a gas fueled water heater | |
JP6234387B2 (en) | Heat source equipment | |
KR100764212B1 (en) | The istantaneous water heater which the second safety device have | |
KR101041946B1 (en) | Fire extinguishing apparatus using hot-water | |
JP2017211103A (en) | Water heater | |
TWI540289B (en) | Combustion control method of gas appliance | |
KR101890607B1 (en) | Safe stop method to prevent external fire when boiler is operating in automatic mode | |
CN204705044U (en) | A kind of control device for Horizontal gas hot-water boiler combustor | |
JP4907622B2 (en) | Open combustion system | |
TWI477724B (en) | Method for controlling water heater with water flow rate control valve | |
CN107036291A (en) | A kind of gas heater hot water circulating device | |
JP6341002B2 (en) | Water heater | |
CN204787305U (en) | Protection system of gas electric fan heater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GRAND MATE CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUANG, CHUNG-CHIN;HUANG, CHIN-YING;HUANG, HSIN-MING;AND OTHERS;REEL/FRAME:032748/0623 Effective date: 20140421 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |