CN103821966A - Valve assembly applied to water heater and capable of bypass connection with scale cleaner - Google Patents
Valve assembly applied to water heater and capable of bypass connection with scale cleaner Download PDFInfo
- Publication number
- CN103821966A CN103821966A CN201410108063.9A CN201410108063A CN103821966A CN 103821966 A CN103821966 A CN 103821966A CN 201410108063 A CN201410108063 A CN 201410108063A CN 103821966 A CN103821966 A CN 103821966A
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- China
- Prior art keywords
- valve
- intake tunnel
- bypass
- ball valve
- exhalant canal
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K19/00—Arrangements of valves and flow lines specially adapted for mixing fluids
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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
- F24H9/00—Details
- F24H9/16—Arrangements for water drainage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/20—Cleaning; Removing snow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Details Of Valves (AREA)
- Multiple-Way Valves (AREA)
- Taps Or Cocks (AREA)
Abstract
A valve assembly applied to a water heater and capable of bypass connection with a scale cleaner comprises a three-way ball valve and a four-way ball valve, wherein the three-way ball valve comprises a water inlet channel, a water outlet channel and a bypass water inlet channel, and the four-way ball valve comprises a water inlet channel, a water outlet channel, a bypass water outlet channel and a pressure safety valve assembly. The valve assembly has the advantages that the valve assembly formed by the three-way ball valve and the four-way ball valve is connected with the water heater, due to the valve assembly, cleaning work can be performed under the condition that an inner container does not need to be detached for adding detergent, the detergent can be guided in just through a bypass pipeline, the valve assembly can be circularly used, a technician does not need to visit a user for use of the valve assembly, the water heater does not need to be detached and washed, and the valve assembly is convenient to use and environmentally friendly.
Description
Technical field
The present invention relates to a kind of valve combination, especially a kind of valve combination that can bypass connects scale eliminator that is applied to water heater.
Background technique
Electric water heater and solar water heater all adopt inner bag to store and heating water, meanwhile, for reducing the corrosion of acid ingredient to inner bag in water, add magnesium rod to carry out cathodic protection in inner bag.But, water heater is long-term use after, all kinds of impurity such as calcium carbonate, iron oxide adulterating in magnesium carbonate that the reaction of magnesium rod generates, water can be piled up, and on wall of inner container and heating element attached, form gradually a thick layer of incrustation scale.The incrustation scale covering on heating equipment has been isolated heating element and water, and then has hindered effective transmission of heat, affects heating properties.Meanwhile, on inwall a thick layer of incrustation scale also for growing of bacterium provides hotbed.Therefore, all water heater manufacturers all can inform that user need carry out periodical blowdown to water heater, and corresponding after sales service is provided.
Through investigation, in household water heater, the removing of incrustation scale is mainly that after sales service personnel manually tear machine cleaning open at present.Water heater is pulled down from wall, opened heating pipe place, dispel the incrustation scale of inner bag or heating pipe by instrument brute force.This method wastes time and energy, and sometimes also can make the damage of machine.In recent years, people are also studying the way simple and easy to operate that can remove incrustation scale always.Wherein the method for chemicals removing incrustation scale is more and more paid close attention to.The way that chemicals is removed incrustation scale is mainly to utilize medicine and incrustation scale to react, and generates water-soluble material, finally reaction liquid is discharged.This method has been saved the trouble of manually tearing machine open, also can not cause damage to water heater itself.But due to the designing requirement of water heater self, except water intake, water outlet and sewage draining exit, all the other positions are all closure designs, and three mouths generally can arrange straight down, and this dosing for chemicals is very unfavorable.
Summary of the invention
Technical problem to be solved by this invention is that a kind of valve combination that can bypass connects scale eliminator that is applicable to being applied to water heater is provided for the above-mentioned state of the art, by this valve combination, make cleaning throw in washing agent without taking inner bag apart, only need to import washing agent by bypass line, can be recycled, without technician visit, without water heater is unpicked and washed, facilitate environmental protection, easy to use.
The present invention solves the problems of the technologies described above adopted technological scheme: a kind of valve combination that can bypass connects scale eliminator that is applied to water heater, comprise a tee ball valve and a four way ball valve, described tee ball valve comprises an intake tunnel, an exhalant canal and a bypass intake tunnel; Described four way ball valve comprises an intake tunnel, an exhalant canal, a bypass exhalant canal and a pressure relief valve assembly; It is characterized in that: described tee ball valve is connected with the import of water heater, described four way ball valve is connected with the outlet of water heater.
As improvement, described tee ball valve, comprise valve body, spool, valve gap, valve rod and handle, on described valve body, offer valve pocket, and with the valve pocket fluid passage that is conducted, this fluid passage comprises an intake tunnel, a bypass intake tunnel and an exhalant canal, spool is installed in valve pocket, between spool and valve pocket, be provided with seal arrangement and form spool and valve pocket between be sealed and matched, the inner of valve rod is connected with spool, the outer end of valve rod passes valve body and is connected with handle, spool is provided with T-shaped connecting passage, valve gap has all been threaded on intake tunnel and exhalant canal,
Corresponding, intake tunnel on described valve body and exhalant canal are on same straight line, and it is one L shaped that bypass intake tunnel and exhalant canal form;
Corresponding, described handle and intake tunnel are in the time of same straight line, and intake tunnel is communicated with exhalant canal; When described handle is vertical with intake tunnel, bypass intake tunnel is communicated with exhalant canal;
Corresponding, on described bypass intake tunnel, be connected with a dismountable stifle, on stifle, be provided with sealing gasket, between stifle and valve gap, fasten chain.
As improvement, described four way ball valve, comprise valve body, spool, valve gap, valve rod, handle and relief valve assembly, on described valve body, offer valve pocket, and with the valve pocket fluid passage that is conducted, this fluid passage comprises an intake tunnel, an exhalant canal, a bypass exhalant canal and a safety valve connecting passage, spool is installed in valve pocket, between spool and valve pocket, be provided with seal arrangement and form spool and valve pocket between be sealed and matched, the inner of valve rod is connected with spool, the outer end of valve rod passes valve body and is connected with handle, spool is provided with T-shaped connecting passage, valve gap has all been threaded on intake tunnel and exhalant canal,
Corresponding, intake tunnel on described valve body and exhalant canal are on same straight line, and it is one L shaped that intake tunnel and bypass exhalant canal form;
Corresponding, described handle and intake tunnel are in the time of same straight line, and intake tunnel is communicated with exhalant canal; When described handle is vertical with intake tunnel, bypass exhalant canal is communicated with intake tunnel;
Corresponding, on described bypass exhalant canal, be connected with a dismountable stifle, on stifle, be provided with sealing gasket, between stifle and valve gap, fasten chain;
Corresponding, the described safety valve connecting passage relief valve assembly that has been threaded.
As improvement, when tee ball valve handle, four way ball valve handle are consistent with intake tunnel direction, water heater is in normal operating condition; Adjust tee ball valve handle and become plumbness with intake tunnel, adjust four way ball valve handle and become plumbness with intake tunnel, introduce washing agent by tee ball valve bypass channel, flow out washing agent by four way ball valve bypass channel, can implement wash cycles to water heater; Adjust tee ball valve handle consistent with intake tunnel, adjust four way ball valve handle and become plumbness with intake tunnel, can rinse the raffinate in water heater with clear water; Recover tee ball valve handle, four way ball valve handle is consistent with intake tunnel direction, water heater uses and recovers normally.
Compared with prior art, the invention has the advantages that: application tee ball valve is connected with water heater with the combination of four way ball valve composition, by this valve combination, make cleaning throw in washing agent without taking inner bag apart, only need to import washing agent by bypass line, can be recycled, without technician visit, without water heater is unpicked and washed, facilitate environmental protection, easy to use.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of described tee ball valve.
Fig. 2 is the plan structure schematic diagram of described tee ball valve.
Fig. 3 is the main TV structure schematic diagram of described four way ball valve.
Fig. 4 is the plan structure schematic diagram of described four way ball valve.
Fig. 5 is that the present invention is connected the normal schematic diagram that uses with water heater.
Fig. 6 is that the present invention is connected cleaning view with water heater.
Fig. 7 is that the present invention is connected flushing view with water heater.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
The present invention solves the problems of the technologies described above adopted technological scheme: a kind of valve combination that can bypass connects scale eliminator that is applied to water heater, comprise a tee ball valve 1 and a four way ball valve 2, described tee ball valve 1 comprises 11, one exhalant canals 12 of an intake tunnel and a bypass intake tunnel 13; Described four way ball valve 2 comprises 21, one exhalant canals of an intake tunnel 22, bypass exhalant canal 23 and a pressure relief valve assembly 25; It is characterized in that: described three-way valve 1 is connected with the import 31 of water heater 3, described four-way valve 2 is connected with the outlet 32 of water heater 3.
Described tee ball valve 1, comprise valve body 14, spool 15, valve gap 16, valve rod 17 and handle 18, on described valve body 14, offer valve pocket and with the valve pocket fluid passage that is conducted, this fluid passage comprises an intake tunnel 11, a bypass intake tunnel 12 and an exhalant canal 13, spool 15 is installed in valve pocket, between spool 15 and valve pocket, be provided with sealing gasket 19 and form spool and valve pocket between be sealed and matched, the lower end of valve rod 17 is connected with spool 15, the upper end of valve rod 17 passes valve body 1 and is connected with handle 18, spool 15 is provided with T-shaped connecting passage, valve gap 16 has all been threaded on intake tunnel 11 and exhalant canal 12, intake tunnel on described valve body 14 11 is with exhalant canal 13 on same straight line, and it is one L shaped that bypass intake tunnel 12 and exhalant canal 13 form, described handle 18 is with intake tunnel 11 in the time of same straight line, and intake tunnel 11 is communicated with exhalant canal 13, when described handle 18 is vertical with intake tunnel 11, bypass intake tunnel 12 is communicated with exhalant canal 13, on described bypass intake tunnel 12, be connected with a dismountable stifle 50, on stifle 50, be provided with sealing gasket 51, between stifle 50 and valve gap 16, fastened chain 52.
Described four way ball valve 2, comprise valve body 26, spool 27, valve gap 28, valve rod 29, handle 60 and relief valve assembly 25, on described valve body 26, offer valve pocket and with the valve pocket fluid passage that is conducted, this fluid passage comprises an intake tunnel 21, an exhalant canal 22, a bypass exhalant canal 23 and a safety valve connecting passage 24, spool 27 is installed in valve pocket, between spool 27 and valve pocket, be provided with sealing gasket 61 and form being sealed and matched between spool 27 and valve pocket, the lower end of valve rod 29 is connected with spool 27, the upper end of valve rod 29 passes valve body 26 and is connected with handle 60, spool 27 is provided with T-shaped connecting passage, valve gap 28 has all been threaded on intake tunnel 21 and exhalant canal 22, intake tunnel on described valve body 26 21 is with exhalant canal 22 on same straight line, and it is one L shaped that intake tunnel 21 and bypass exhalant canal 23 form, described handle 60 is with intake tunnel 21 in the time of same straight line, and intake tunnel 21 is communicated with exhalant canal 22, when described handle 60 is vertical with intake tunnel 21, bypass exhalant canal 23 is communicated with intake tunnel 21, on described bypass exhalant canal 23, be connected with a dismountable stifle 62, on stifle 62, be provided with sealing gasket 63, between stifle 62 and valve gap 28, fastened chain 64, described safety valve connecting passage 24 relief valve assembly 25 that has been threaded.
When the handle 18 of described tee ball valve 1, the handle 60 of four way ball valve 2 are consistent with intake tunnel direction separately, water heater is in normal operating condition; Adjust tee ball valve handle 18 and 11 one-tenth plumbnesss of intake tunnel, adjust four way ball valve handle 60 and 21 one-tenth plumbnesss of intake tunnel, bypass intake tunnel 12 by tee ball valve 1 is introduced washing agent, bypass exhalant canal 23 by four way ball valve 2 flows out washing agent, can implement wash cycles to water heater liner; The handle 18 of adjusting tee ball valve 1 is consistent with the direction of intake tunnel 11, and the handle 60 of adjusting four way ball valve becomes plumbness with the direction of intake tunnel 21, can rinse the raffinate in water heater with clear water; Recover tee ball valve handle, four way ball valve handle is consistent with intake tunnel direction, water heater uses and recovers normally.
Working principle of the present invention is further described.
The inlet passage 11 of described tee ball valve 1 of the present invention is connected with tap water, outlet passage 12 is connected with the import of water heater, the inlet passage 21 of described four way ball valve 2 is connected with the outlet of water heater, outlet passage 22 is connected with water consumption device, maintaining valve door handle direction is consistent with the direction of intake tunnel, and water heater can normally use.
In the time that needs clean water heater liner, adjust described tee ball valve vertical with the direction of the handle of four way ball valve and the direction of intake tunnel, now, water heater is communicated with the bypass intake tunnel of described tee ball valve and the bypass exhalant canal of four-way valve, tap water supply cuts off, and water heater was cut off with being connected also of water consumption device.Be connected with scale eliminator by the bypass intake tunnel of described three-way valve and the bypass exhalant canal of four-way valve, open water pump, cleaning solution enters water heater from the bypass intake tunnel of three-way valve, then flows out from the bypass exhalant canal of four-way valve, and water heater liner is carried out to wash cycles.After cleaning completes, close the water pump of washing apparatus, the handle of adjusting tee ball valve is consistent with intake tunnel direction, recovers tap water supply, now, under the effect of tap water hydraulic, sewage in courage can be flowed out by the bypass exhalant canal of four way ball valve.After in courage, sewage drains, the handle of adjusting four way ball valve is consistent with intake tunnel direction, and recovery heat hydrophone bosom water consumption device is communicated with, and water heater normally uses.
In the time that the pressure in water heater container increases due to thermal expansion stresses, when pressure reaches certain numerical value, the safety valve connecting on described four way ball valve is opened draining, makes the pressure in cavity can not continue to rise or add up, remain within the scope of certain pressure, thereby guarantee water heater and pipe safety.When the pressure drop in container is to certain value, safety valve cuts out not draining, keeps water heater normally to use.
Claims (11)
1. a valve combination that can bypass connects scale eliminator that is applied to water heater, comprises a tee ball valve and a four way ball valve, and described tee ball valve comprises an intake tunnel, an exhalant canal and a bypass intake tunnel; Described four way ball valve comprises an intake tunnel, an exhalant canal, a bypass exhalant canal and a pressure relief valve assembly; It is characterized in that: described three-way valve is connected with the import of water heater, described four-way valve be connected with outlet water heater.
2. according to the valve combination that can bypass connects scale eliminator that is applied to water heater described in right 1, it is characterized in that: described tee ball valve, comprise valve body, spool, valve gap, valve rod and handle, on described valve body, offer valve pocket, and with the valve pocket fluid passage that is conducted, this fluid passage comprises an intake tunnel, a bypass intake tunnel and an exhalant canal, spool is installed in valve pocket, between spool and valve pocket, be provided with seal arrangement and form spool and valve pocket between be sealed and matched, the inner of valve rod is connected with spool, the outer end of valve rod passes valve body and is connected with handle, spool is provided with T-shaped connecting passage, valve gap has all been threaded on intake tunnel and exhalant canal.
3. according to the tee ball valve described in right 2, it is characterized in that: the intake tunnel on described valve body and exhalant canal are on same straight line, and it is one L shaped that bypass intake tunnel and exhalant canal form.
4. according to the tee ball valve described in right 2, it is characterized in that: described handle and intake tunnel are in the time of same straight line, and intake tunnel is communicated with exhalant canal; When described handle is vertical with intake tunnel, bypass intake tunnel is communicated with exhalant canal.
5. according to the tee ball valve described in right 2, it is characterized in that: on described bypass intake tunnel, be connected with a dismountable stifle, on stifle, be provided with sealing gasket, between stifle and valve gap, fastened chain.
6. according to the valve combination that can bypass connects scale eliminator that is applied to water heater described in right 1, it is characterized in that: described four way ball valve, comprise valve body, spool, valve gap, valve rod, handle and relief valve assembly, on described valve body, offer valve pocket, and with the valve pocket fluid passage that is conducted, this fluid passage comprises an intake tunnel, an exhalant canal, a bypass exhalant canal and a safety valve connecting passage, spool is installed in valve pocket, between spool and valve pocket, be provided with seal arrangement and form spool and valve pocket between be sealed and matched, the inner of valve rod is connected with spool, the outer end of valve rod passes valve body and is connected with handle, spool is provided with T-shaped connecting passage, valve gap has all been threaded on intake tunnel and exhalant canal.
7. according to the four way ball valve described in right 6, it is characterized in that: intake tunnel on described valve body and exhalant canal are on same straight line, and it is one L shaped that intake tunnel and bypass exhalant canal form.
8. according to the four way ball valve described in right 6, it is characterized in that: described handle and intake tunnel are in the time of same straight line, and intake tunnel is communicated with exhalant canal; When described handle is vertical with intake tunnel, bypass exhalant canal is communicated with intake tunnel.
9. according to the four way ball valve described in right 6, it is characterized in that: on described bypass exhalant canal, be connected with a dismountable stifle, on stifle, be provided with sealing gasket, between stifle and valve gap, fastened chain.
10. according to the four way ball valve described in right 6, it is characterized in that: the described safety valve connecting passage relief valve assembly that has been threaded.
11. according to the valve combination that can bypass connects scale eliminator that is applied to water heater described in right 1, it is characterized in that: when described tee ball valve handle, four way ball valve handle are consistent with intake tunnel direction, water heater is in normal operating condition; Adjust tee ball valve handle and become plumbness with intake tunnel, adjust four way ball valve handle and become plumbness with intake tunnel, be connected with scale eliminator with four way ball valve bypass exhalant canal by tee ball valve bypass intake tunnel, can implement wash cycles to water heater; Adjust tee ball valve handle consistent with intake tunnel, adjust four way ball valve handle and become plumbness with intake tunnel, can rinse water heater with tap water and clean residual waste liquid in rear courage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410108063.9A CN103821966A (en) | 2014-03-24 | 2014-03-24 | Valve assembly applied to water heater and capable of bypass connection with scale cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410108063.9A CN103821966A (en) | 2014-03-24 | 2014-03-24 | Valve assembly applied to water heater and capable of bypass connection with scale cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103821966A true CN103821966A (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410108063.9A Pending CN103821966A (en) | 2014-03-24 | 2014-03-24 | Valve assembly applied to water heater and capable of bypass connection with scale cleaner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103821966A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696550A (en) * | 2015-03-16 | 2015-06-10 | 成都美景舒适家居有限公司 | Multi-purpose composite pipeline connecting component with bypass |
| CN109654940A (en) * | 2019-01-29 | 2019-04-19 | 江苏必领能源科技有限公司 | A kind of automatic descaling apparatus and its working method of heat pump heat recovery system |
| CN113710968A (en) * | 2019-03-29 | 2021-11-26 | 里姆制造公司 | Automatic descaling system |
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| US5406935A (en) * | 1994-03-03 | 1995-04-18 | Cinotto; Gary R. | Water heater drain valve |
| US20080258092A1 (en) * | 2007-04-20 | 2008-10-23 | Giulio Pettinaroli | Valve for Tankless Water Heater |
| CN201935425U (en) * | 2011-01-27 | 2011-08-17 | 吴艳频 | Solar water heating system on balcony |
| CN202813732U (en) * | 2012-09-04 | 2013-03-20 | 芜湖美的厨卫电器制造有限公司 | Electric water heater |
| CN203463704U (en) * | 2013-07-01 | 2014-03-05 | 自贡信赖泵阀制造有限公司 | Three-position pipeline-cleaning type three-way ball valve |
| CN203743502U (en) * | 2014-03-24 | 2014-07-30 | 宁波华成阀门有限公司 | Valve combination being applied to water heater and being capable of being in bypass connection with incrustation clearing device |
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2014
- 2014-03-24 CN CN201410108063.9A patent/CN103821966A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406935A (en) * | 1994-03-03 | 1995-04-18 | Cinotto; Gary R. | Water heater drain valve |
| US20080258092A1 (en) * | 2007-04-20 | 2008-10-23 | Giulio Pettinaroli | Valve for Tankless Water Heater |
| CN201935425U (en) * | 2011-01-27 | 2011-08-17 | 吴艳频 | Solar water heating system on balcony |
| CN202813732U (en) * | 2012-09-04 | 2013-03-20 | 芜湖美的厨卫电器制造有限公司 | Electric water heater |
| CN203463704U (en) * | 2013-07-01 | 2014-03-05 | 自贡信赖泵阀制造有限公司 | Three-position pipeline-cleaning type three-way ball valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696550A (en) * | 2015-03-16 | 2015-06-10 | 成都美景舒适家居有限公司 | Multi-purpose composite pipeline connecting component with bypass |
| CN104696550B (en) * | 2015-03-16 | 2017-08-29 | 成都美景舒适家居有限公司 | A kind of multi-purpose pipeline band bypass composite joint component |
| CN109654940A (en) * | 2019-01-29 | 2019-04-19 | 江苏必领能源科技有限公司 | A kind of automatic descaling apparatus and its working method of heat pump heat recovery system |
| CN113710968A (en) * | 2019-03-29 | 2021-11-26 | 里姆制造公司 | Automatic descaling system |
| US11975994B2 (en) | 2019-03-29 | 2024-05-07 | Rheem Manufacturing Company | Automatic descaling system |
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Application publication date: 20140528 |