WO2005015089A2 - Pre-heating system for hot-water supply piping - Google Patents
Pre-heating system for hot-water supply piping Download PDFInfo
- Publication number
- WO2005015089A2 WO2005015089A2 PCT/KR2004/001915 KR2004001915W WO2005015089A2 WO 2005015089 A2 WO2005015089 A2 WO 2005015089A2 KR 2004001915 W KR2004001915 W KR 2004001915W WO 2005015089 A2 WO2005015089 A2 WO 2005015089A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- hot
- supply piping
- water supply
- heater
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 174
- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 239000008236 heating water Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- XGFJCRNRWOXGQM-UHFFFAOYSA-N hot-2 Chemical compound CCSC1=CC(OC)=C(CCNO)C=C1OC XGFJCRNRWOXGQM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
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
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
Definitions
- the present invention relates to a pre-heating system for hot-water supply piping, and more particularly to a pre-heating system for hot-water supply piping that is capable of heating cold water left in hot-water supply piping between a boiler and a faucet when hot water heated by means of the boiler is to be used, thereby preventing waste of water.
- the hot-water supply piping laid under the floor of an apartment has a radius of 6 mm and a length of approximately 35 m.
- the amount of cold water left in the hot- 2 water supply piping of each apartment is 35 m x 0.006 x 3.14, i.e., 0.00395 m . Consequently, 3.96 liters of cold water is left in the hot-water supply piping per apartment.
- hot water is used once a day in all of the apartments, i.e., 593 apartments, 593 x 3.95 liters, i.e., 2,342 liters (approximately 2.4 tons) of cold water is wasted. In fact, hot water may be used several times a day. Consequently, much more than 2,342 liters of cold water may be wasted.
- the present invention has been made in view of the above problems, and it is an object of the present invention to provide a pre-heating system for hot-water supply piping that is capable of heating water supplied through the hot-water supply piping to an appropriate temperature, thereby preventing waste of water.
- a pre-heating system for hot-water supply piping comprising: a heater attached to hot-water supply piping for heating water in the hot- water supply piping; a first temperature sensor attached to the front end of the heater for measuring the temperature of water introduced into the hot-water supply piping through a water inlet of the hot-water supply piping; a second temperature sensor attached to the rear end of the heater for measuring the temperature of water discharged from the hot-water supply piping through a water outlet of the hot-water supply piping; a setting unit for setting the temperature of water discharged from the hot-water supply piping through the water outlet of the hot-water supply piping; a driving unit for driving the heater when electric current is supplied to the driving unit; a control unit for allowing the driving unit to drive the heater when it is detected by means of the first temperature sensor that the temperature of water introduced into the hot-water supply piping through the water inlet of the hot-water supply piping is lower
- the material for the hot-water supply piping of the present invention may be copper, tin, iron, polyvinyl chloride (PVC), or a composite thereof.
- the hot- water supply piping is made of copper tubing in view of its thermal conductivity.
- the driving unit controls duty of the heater so that the generation amount of heat is controlled.
- FKJ. 1 is a perspective view showing the structure of a type of heater used in a preheating system for hot-water supply piping according to the present invention
- FKJ. 2 is a perspective view showing the structure of another type of heater used in a pre-heating system for hot-water supply piping according to the present invention.
- FKJ. 3 is a block diagram illustrating the construction of a pre-heating system for hot-water supply piping according to the present invention.
- the pre-heating system for hot-water supply piping controls the temperature of water supplied from the hot-water supply piping, through which hot water heated by means of a boiler is supplied to a hot-water faucet. As shown in FKJ.
- the pre-heating system for hot-water supply piping comprises: a heater 12 attached to hot-water supply piping 10 for heating water in the hot-water supply piping 10 ; a first temperature sensor 25 attached to the front end of the heater 12 for measuring the temperature of water introduced into the hot-water supply piping 10 through a water inlet of the hot-water supply piping 10 ; a second temperature sensor 24 attached to the rear end of the heater 12 for measuring the temperature of water discharged from the hot-water supply piping 10 through a water outlet of the hot-water supply piping 10 ; a setting unit 27 for setting the temperature of water discharged from the hot-water supply piping 10 through the water outlet of the hot- water supply piping 10 ; a driving unit 22 for driving the heater 12 when electric current is supplied to the driving unit 22 ; a control unit 20 for allowing the driving unit 22 to drive the heater 12 when it is detected by means of the first temperature sensor 25 that the temperature of water introduced into the hot-water supply piping 10 through the water inlet of the hot-water supply piping
- the driving unit 22 controls the duty of power supplied to the heater 12 through duty control, such as pulse width modulation (PWM) to control the generation amount of heat so that the temperature in the hot-water supply piping 10 is controlled.
- duty control such as pulse width modulation (PWM)
- the heater 12 heating the hot-water supply piping 10 is a cylindrical heater fully attached to the outer circumference of the hot-water supply piping 10 as shown in FIG. 1.
- the heater 12 is operated by means of an electric current supplied from the driving unit 22 through a terminal 14.
- the heater 12 having the structure shown in FKJ. 1 may be made of a tube-type ceramic element or a positive temperature coefficient (PTC) element. [28] If the heater 12 is made of the positive temperature coefficient element, its temperature can be easily controlled because electric current is automatically cut off when the temperature of the positive temperature coefficient element reaches a prescribed value.
- PTC positive temperature coefficient
- a ceramic heater 12a comprised of hot wires may be longitudinally attached to the outer circumference of the hot-water supply piping 10 as shown in FKJ. 2.
- the heater 12a is operated by means of an electric current supplied from the driving unit 22 through a terminal 14a.
- the present invention provides a preheating system for hot-water supply piping that is capable of heating cold water left in hot-water supply piping between a boiler and a faucet. Consequently, the present invention has the effect of preventing waste of water in the hot-water supply piping, which is not heated by means of a boiler, when hot water is to be used.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Details Of Fluid Heaters (AREA)
- Domestic Plumbing Installations (AREA)
Abstract
Disclosed herein is a pre-heating system for hot-water supply piping that is capable of heating cold water left between a boiler and a faucet when hot water heated by means of the boiler is to be used, thereby preventing waste of water. A heater is attached to hot-water supply piping such that water in the hot-water supply piping, which is not heated by means of the boiler, can be heated by means of the heater. Consequently, cold water left in hot-water supply piping between the boiler and the faucet can be effectively heated by means of the heater. The present invention has the effect of preventing waste of water in the hot-water supply piping, which is not heated by means of the boiler, when hot water is to be used.
Description
Description PRE HEATING SYSTEM FOR HOT-WATER SUPPLY PIPING Technical Field
[1] The present invention relates to a pre-heating system for hot-water supply piping, and more particularly to a pre-heating system for hot-water supply piping that is capable of heating cold water left in hot-water supply piping between a boiler and a faucet when hot water heated by means of the boiler is to be used, thereby preventing waste of water.
[2] Background Art
[3] Present day home life has a close connection with water service. On this account, it is necessary to prevent waste of service water.
[4] Living in an apartment is common throughout the nation. Large-scale apartment complexes have been increasingly built, which has led to an explosive increase in the use of service water.
[5] When using hot water from a faucet of a washstand, a shower, or a kitchen sink, excluding toilet flushes, disposed in an apartment, a user habitually wastes cold water left in hot-water supply piping until hot water is supplied through the faucet, i.e., until hot water heated by means of a boiler installed in the apartment is supplied through the faucet.
[6] Water used in an apartment is heated and supplied by means of a boiler individually installed in the apartment, and the hot water is directly supplied through hot-water supply piping without provision of hot-water return piping.
[7] Therefore, it is necessary to obtain hot water already heated to a desired temperature from a faucet immediately when water is supplied from the faucet, whereby waste of cold water left in hot-water supply piping is prevented, and thus a large amount of service water is prevented from being wasted.
[8] The wasted amount of cold water is calculated as follows:
[9] In the case of an apartment complex having 593 apartments of 1152 square feet in size, the hot-water supply piping laid under the floor of an apartment has a radius of 6 mm and a length of approximately 35 m. The amount of cold water left in the hot- 2 water supply piping of each apartment is 35 m x 0.006 x 3.14, i.e., 0.00395 m . Consequently, 3.96 liters of cold water is left in the hot-water supply piping per apartment.
[10] If hot water is used once a day in all of the apartments, i.e., 593 apartments, 593 x 3.95 liters, i.e., 2,342 liters (approximately 2.4 tons) of cold water is wasted. In fact, hot water may be used several times a day. Consequently, much more than 2,342 liters of cold water may be wasted.
[11] In the case that the number of apartments is great and the area of the apartment is large, the length of hot-water supply piping is increased. As a result, the wasted amount of cold water is increased in proportion to the increased length of the hot-water supply piping. Giving consideration to the amount of cold water in pipes from the hot- water supply piping to a kitchen sink, a shower set, and a washstand, waste of water is enormous.
[12] Disclosure of Invention Technical Problem
[13] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a pre-heating system for hot-water supply piping that is capable of heating water supplied through the hot-water supply piping to an appropriate temperature, thereby preventing waste of water.
[14] In accordance with the present invention, the above and other objects can be accomplished by the provision of a pre-heating system for hot-water supply piping, comprising: a heater attached to hot-water supply piping for heating water in the hot- water supply piping; a first temperature sensor attached to the front end of the heater for measuring the temperature of water introduced into the hot-water supply piping through a water inlet of the hot-water supply piping; a second temperature sensor attached to the rear end of the heater for measuring the temperature of water discharged from the hot-water supply piping through a water outlet of the hot-water supply piping; a setting unit for setting the temperature of water discharged from the hot-water supply piping through the water outlet of the hot-water supply piping; a driving unit for driving the heater when electric current is supplied to the driving unit; a control unit for allowing the driving unit to drive the heater when it is detected by means of the first temperature sensor that the temperature of water introduced into the hot-water supply piping through the water inlet of the hot-water supply piping is lower than a prescribed temperature of water set by means of the setting unit so that the water is heated until the temperature of water discharged from the hot-water supply piping through the water outlet of the hot-water supply piping, which is detected by means of
the second temperature sensor, reaches the prescribed water temperature set by means of the setting unit, and for not allowing the driving unit to drive the heater when it is detected by means of the first temperature sensor that the temperature of water introduced into the hot-water supply piping through the water inlet of the hot-water supply piping is not lower than the prescribed temperature of water set by means of the setting unit so that the water is not heated; a display unit connected to the control unit for displaying the operation status of the heater; and an excessive current interrupting unit for preventing excessive current from being introduced into the driving unit and the heater.
[15] The material for the hot-water supply piping of the present invention may be copper, tin, iron, polyvinyl chloride (PVC), or a composite thereof. Preferably, the hot- water supply piping is made of copper tubing in view of its thermal conductivity.
[16] Preferably, the driving unit controls duty of the heater so that the generation amount of heat is controlled.
[17] Brief Description of the Drawings
[18] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
[19] FKJ. 1 is a perspective view showing the structure of a type of heater used in a preheating system for hot-water supply piping according to the present invention;
[20] FKJ. 2 is a perspective view showing the structure of another type of heater used in a pre-heating system for hot-water supply piping according to the present invention; and
[21] FKJ. 3 is a block diagram illustrating the construction of a pre-heating system for hot-water supply piping according to the present invention.
[22] Mode for the Invention
[23] N)w, construction and operation of a pre-heating system for hot-water supply piping according to the present invention will be described in detail with reference to the accompanying drawings.
[24] The pre-heating system for hot-water supply piping according to the present invention controls the temperature of water supplied from the hot-water supply piping, through which hot water heated by means of a boiler is supplied to a hot-water faucet.
As shown in FKJ. 3, the pre-heating system for hot-water supply piping comprises: a heater 12 attached to hot-water supply piping 10 for heating water in the hot-water supply piping 10 ; a first temperature sensor 25 attached to the front end of the heater 12 for measuring the temperature of water introduced into the hot-water supply piping 10 through a water inlet of the hot-water supply piping 10 ; a second temperature sensor 24 attached to the rear end of the heater 12 for measuring the temperature of water discharged from the hot-water supply piping 10 through a water outlet of the hot-water supply piping 10 ; a setting unit 27 for setting the temperature of water discharged from the hot-water supply piping 10 through the water outlet of the hot- water supply piping 10 ; a driving unit 22 for driving the heater 12 when electric current is supplied to the driving unit 22 ; a control unit 20 for allowing the driving unit 22 to drive the heater 12 when it is detected by means of the first temperature sensor 25 that the temperature of water introduced into the hot-water supply piping 10 through the water inlet of the hot-water supply piping 10 is lower than a prescribed temperature of water set by means of the setting unit 27 so that the water is heated until the temperature of water discharged from the hot-water supply piping 10 through the water outlet of the hot-water supply piping 10, which is detected by means of the second temperature sensor 24, reaches the prescribed temperature of water set by means of the setting unit 27, and for not allowing the driving unit 22 to drive the heater 12 when it is detected by means of the first temperature sensor 25 that the temperature of water introduced into the hot-water supply piping 10 through the water inlet of the hot-water supply piping 10 is not lower than the prescribed temperature of water set by means of the setting unit 27 so that the water is not heated; a display unit 28 connected to the control unit for displaying the operation status of the heater 12 ; and an excessive current interrupting unit 29 for preventing excessive current from being introduced into the driving unit 22 and the heater 12.
[25] The driving unit 22 controls the duty of power supplied to the heater 12 through duty control, such as pulse width modulation (PWM) to control the generation amount of heat so that the temperature in the hot-water supply piping 10 is controlled.
[26] The heater 12 heating the hot-water supply piping 10 is a cylindrical heater fully attached to the outer circumference of the hot-water supply piping 10 as shown in FIG. 1. The heater 12 is operated by means of an electric current supplied from the driving unit 22 through a terminal 14.
[27] The heater 12 having the structure shown in FKJ. 1 may be made of a tube-type ceramic element or a positive temperature coefficient (PTC) element.
[28] If the heater 12 is made of the positive temperature coefficient element, its temperature can be easily controlled because electric current is automatically cut off when the temperature of the positive temperature coefficient element reaches a prescribed value.
[29] Alternatively, a ceramic heater 12a comprised of hot wires may be longitudinally attached to the outer circumference of the hot-water supply piping 10 as shown in FKJ. 2. The heater 12a is operated by means of an electric current supplied from the driving unit 22 through a terminal 14a. In this case, it is necessary that the ceramic heater 12a be securely fixed to the hot-water supply piping 10 by means of a fixing wire 12b.
[30] Industrial Applicability
[31] As apparent from the above description, the present invention provides a preheating system for hot-water supply piping that is capable of heating cold water left in hot-water supply piping between a boiler and a faucet. Consequently, the present invention has the effect of preventing waste of water in the hot-water supply piping, which is not heated by means of a boiler, when hot water is to be used.
[32] Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
[33]
Claims
[1] A pre-heating system for hot-water supply piping, comprising: a heater attached to hot-water supply piping for heating water in the hot-water supply piping; a first temperature sensor attached to the front end of the heater for measuring the temperature of water introduced into the hot-water supply piping through a water inlet of the hot-water supply piping; a second temperature sensor attached to the rear end of the heater for measuring the temperature of water discharged from the hot-water supply piping through a water outlet of the hot-water supply piping; a setting unit for setting the temperature of water discharged from the hot-water supply piping through the water outlet of the hot-water supply piping; a driving unit for driving the heater when electric current is supplied to the driving unit; a control unit for allowing the driving unit to drive the heater when it is detected by means of the first temperature sensor that the temperature of water introduced into the hot-water supply piping through the water inlet of the hot-water supply piping is lower than a prescribed temperature of water set by means of the setting unit so that the water is heated until the temperature of water discharged from the hot-water supply piping through the water outlet of the hot-water supply piping, which is detected by means of the second temperature sensor, reaches the prescribed temperature of water set by means of the setting unit, and for not allowing the driving unit to drive the heater when it is detected by means of the first temperature sensor that the temperature of water introduced into the hot- water supply piping through the water inlet of the hot-water supply piping is not lower than the prescribed temperature of water set by means of the setting unit so that the water is not heated; a display unit connected to the control unit for displaying the operation status of the heater; and an excessive current interrupting unit for preventing excessive current from being introduced into the driving unit and the heater.
[2] The system as set forth in claim 1, wherein the driving unit controls duty of the heater so that the generation amount of heat is controlled.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0054736A KR100522567B1 (en) | 2003-08-07 | 2003-08-07 | Pre-Heating System of Hot Water Supply Piping |
| KR10-2003-0054736 | 2003-08-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2005015089A2 true WO2005015089A2 (en) | 2005-02-17 |
| WO2005015089A3 WO2005015089A3 (en) | 2005-04-28 |
Family
ID=34132124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2004/001915 WO2005015089A2 (en) | 2003-08-07 | 2004-07-30 | Pre-heating system for hot-water supply piping |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100522567B1 (en) |
| WO (1) | WO2005015089A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2481593A2 (en) | 2011-01-31 | 2012-08-01 | Kornit Digital Technologies Ltd. | Method and apparatus for safe use of a wet on wet textile printer |
| CN114484886A (en) * | 2022-02-18 | 2022-05-13 | 广州迪森家居环境技术有限公司 | Zero-cold-water control method with preheating overtemperature protection and control device thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100861425B1 (en) * | 2007-03-13 | 2008-10-07 | (주)씨에스이 | The hot water circulation mat |
| US8165461B2 (en) * | 2007-05-07 | 2012-04-24 | Sullivan Joseph M | Modular heating system for tankless water heater |
| US20090010625A1 (en) * | 2007-07-02 | 2009-01-08 | Emerson Electric Co. | Flow Through Heater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220888A (en) * | 1999-01-29 | 2000-08-08 | Sony Disc Technology Inc | Method and device of fluid heating device |
| JP2001250660A (en) * | 2000-03-06 | 2001-09-14 | Ngk Spark Plug Co Ltd | Control method of heater |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142348A (en) * | 1983-02-02 | 1984-08-15 | Matsushita Electric Ind Co Ltd | Hot water feeding device |
| JPH04155148A (en) * | 1990-10-18 | 1992-05-28 | Matsushita Electric Ind Co Ltd | Hot-water supply apparatus |
-
2003
- 2003-08-07 KR KR10-2003-0054736A patent/KR100522567B1/en active IP Right Grant
-
2004
- 2004-07-30 WO PCT/KR2004/001915 patent/WO2005015089A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220888A (en) * | 1999-01-29 | 2000-08-08 | Sony Disc Technology Inc | Method and device of fluid heating device |
| JP2001250660A (en) * | 2000-03-06 | 2001-09-14 | Ngk Spark Plug Co Ltd | Control method of heater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2481593A2 (en) | 2011-01-31 | 2012-08-01 | Kornit Digital Technologies Ltd. | Method and apparatus for safe use of a wet on wet textile printer |
| CN114484886A (en) * | 2022-02-18 | 2022-05-13 | 广州迪森家居环境技术有限公司 | Zero-cold-water control method with preheating overtemperature protection and control device thereof |
| CN114484886B (en) * | 2022-02-18 | 2023-08-08 | 广州迪森家居环境技术有限公司 | Zero cold water control method with preheating overtemperature protection and control device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050015780A (en) | 2005-02-21 |
| KR100522567B1 (en) | 2005-10-18 |
| WO2005015089A3 (en) | 2005-04-28 |
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