CN105627581A - Constant-temperature gas water heater and constant-temperature control method - Google Patents
Constant-temperature gas water heater and constant-temperature control method Download PDFInfo
- Publication number
- CN105627581A CN105627581A CN201610151473.0A CN201610151473A CN105627581A CN 105627581 A CN105627581 A CN 105627581A CN 201610151473 A CN201610151473 A CN 201610151473A CN 105627581 A CN105627581 A CN 105627581A
- Authority
- CN
- China
- Prior art keywords
- module
- circulation
- constant
- temperature sensor
- recycle
- 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.)
- Granted
Links
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
- 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
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)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
The invention discloses a constant-temperature gas water heater which comprises a gas water heater body, a circulating pipeline connected to the gas water heater body and a circulating device mounted on the circulating pipeline. The constant-temperature gas water heater is characterized in that the circulating device comprises a forward circulating module and a backward circulating module, and fluid in the circulating pipeline is circulated forwards under the action of the forward circulating module or circulated backwards under the action of the backward circulating module. The forward circulating module and the backward circulating module are arranged on the circulating device, the circulating water flow direction in the circulating pipeline of the gas water heater can be controlled, and therefore the constant-temperature gas water heater is precisely controlled to be turned on and off; and the gas water heater runs economically and reasonably in the preheating process, it is ensured that the temperature of all sections of the circulating pipeline is even after preheating is completed, and the functional defects of overheating, supercooling, sudden temperature changes and the like of a traditional circulating device are overcome. The invention further discloses a constant-temperature control method.
Description
Technical field
The present invention relates to fluid heater technical field, particularly relate to a kind of constant temp gas water heater and constant-temperature control method.
Background technology
For improving the comfortable property of bathing, on the gas heater having, it is circumscribed with warm-up cycle device at present. Existing warm-up cycle device, though cyclic preheat function can be realized, but due in circulation heat-processed, return water temperature constantly raises, and whipping process without issue, causes the water temperature heated in Posterior circle pipe uneven, do not reach desirable pre-heat effect, have impact on bath comfort.
The applicant tests by experiment and shows, when arranging preheating temperature and be 48 DEG C, adopts existing warm-up cycle device, and preheating leaving water temperature(LWT) up to 60 DEG C, and then can may cause some too high with water spot leaving water temperature(LWT), there is the potential safety hazard directly scalded. And if when set temperature is not high, after easily causing again preheating to complete, pipeline bulk temperature is too low, the first comfortable property opening bathing of serious impact. In addition, when arranging certain preheating temperature pipeline radiating effect and be substantially identical, if water temperature is uneven, easily causes warm-up cycle device frequent starting, it is unfavorable for bathing, also affect warm-up cycle device work-ing life.
Summary of the invention
For problems of the prior art, it is an object of the invention to provide a kind of accurate constant temperature of energy in warm and can not start the constant temp gas water heater of heating in antifreeze circulation.
For reaching above object, the present invention adopts following technical scheme.
A kind of constant temp gas water heater, comprising: gas heater body, the circulating line being connected on gas heater body, and the circulation device being arranged on circulating line; It is characterized in that, described circulation device comprises forward circulation module and recycle back module, the fluid in circulating line under forward circulation module effect forward circulation or under the effect of recycle back module recycle back.
As with improvement, described circulation device comprises: connecting tube, it is arranged on connecting tube can to carry out recycle pump, the temperature sensor of rotating, and the controller being connected with recycle pump, temperature sensor signal; Controller is according to the signal controlled circulation pump forward or reverse of temperature sensor feedback, it is achieved circulation device is in the conversion rotated forward between loop module and reversion loop module.
As with improvement, being connected with instruction module on the controller, by instruction module controlled circulation pump forward or reverse after the signal of controller identification temperature sensor feedback.
As with improvement, described circulation device comprises: connecting tube, recycle pump, temperature sensor, switchable first four-way valve and switchable 2nd four-way valve being arranged on connecting tube, described first four-way valve, the 2nd four-way valve connect the two ends of recycle pump respectively, and a controller is connected with temperature sensor, the first four-way valve, the 2nd four-way valve signal; Controller controls the first four-way valve according to the signal of temperature sensor feedback, the 2nd four-way valve switching turns to and realizes circulation device in the conversion rotated forward between loop module and reversion loop module.
As with improvement, described circulation device comprises: connecting tube, the temperature sensor being arranged on connecting tube, first recycle pump and the first stopping valve, first recycle pump and the first stopping valve form forward circulation module, the 2nd recycle pump and the 2nd stopping valve it is parallel with at the two ends of forward circulation module, the installation direction of installation direction first recycle pump of the 2nd recycle pump is contrary, 2nd recycle pump and the 2nd stopping valve form recycle back module, one controller and described temperature sensor, forward circulation module, recycle back module by signal connects, controller is according to the signal control forward circulation module of temperature sensor feedback or recycle back module work, realize circulation device in the conversion rotated forward between loop module and reversion loop module.
The present invention also provides a kind of constant-temperature control method, it is used for realizing the thermostatic control of gas heater, it is characterized in that, by increasing a circulation device on the circulating line of gas heater, and utilize the forward circulation and the recycle back that just realize circulating line inner fluid to output and reverse output respectively of circulation device.
As with improvement, the switching signal between described forward circulation and recycle back is produced by the temperature sensor being arranged on circulating line, switching order is sent by controller; In the cyclic preheat process of gas heater, when temperature sensor detects return water temperature lower than set(ting)value, controller sends instruction control circulation device just to output, now gas heater detects that current start heating by signal, when temperature sensor detects that return water temperature reaches set(ting)value, controller sends instruction control circulation device and oppositely exports, now, gas heater can't detect water-flow signal to be stopped the heating of water but still keeps the circulation of water, reach the object of mixed water, make in circulating line that even water temperature is constant everywhere.
As with improvement, described just realized by rotating and reverse of simple subprogram pump respectively to output and oppositely exporting.
As with improvement, described just realized to output and oppositely exporting by two different recycle pumps that installation direction is contrary.
As with improvement, described just realize to output and oppositely exporting by being arranged on the switchable four-way valve at recycle pump two ends.
Compared with prior art, the invention has the beneficial effects as follows:
One, by arranging forward circulation module and recycle back module on circulation device, the circular flow direction in gas heater circulating line can be controlled, thus accurately control the opening and closing of constant temp gas water heater, make gas heater economical operation in warm reasonable, and guarantee that preheating completes Posterior circle pipeline each section of homogeneous temperature, overcome the functional deficiency such as overheated, excessively cold, sometimes hot and sometimes cold of traditional circulation device.
Two, actual use, the forward circulation of circulation device and recycle back combined, not only can accurate constant temperature, also there is forward circulation startup water-heater, recycle back does not start the antifreeze function in water-heater two kinds of situations.
Accompanying drawing explanation
Fig. 1 show constant temp gas water heater structural representation provided by the invention.
Fig. 2 show the warm-up cycle apparatus structure schematic diagram that the embodiment of the present invention one provides.
Fig. 3 show the warm-up cycle device thermostatic control schematic diagram that the embodiment of the present invention one provides.
Fig. 4 show the warm-up cycle apparatus structure schematic diagram that the embodiment of the present invention two provides.
Fig. 5 show the warm-up cycle apparatus structure schematic diagram that the embodiment of the present invention three provides.
Description of reference numerals:
1: water heater body, 2: circulating line, 3: circulation device.
3-1: connecting tube, 3-2: recycle pump, 3-3: temperature sensor, 3-4: controller, 3-5: instruction module, the 3-6: the first four-way valve, the 3-7: the two four-way valve, the 3-8: the first recycle pump, 3-9: the first stopping valve, the 3-10: the two recycle pump, the 3-11: the two stopping valve.
Embodiment
Understand the essence of the present invention for convenience of those skilled in the art better, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Embodiment one
As shown in Figure 1, a kind of constant temp gas water heater, comprising: gas heater body 1, the circulating line 2 being connected on gas heater body 1, and the circulation device 3 being arranged on circulating line 2; It is characterized in that, described circulation device 3 comprises forward circulation module and recycle back module, the fluid in circulating line under forward circulation module effect forward circulation or under the effect of recycle back module recycle back.
As shown in Figure 2, described circulation device 3 comprises: connecting tube 3-1, is arranged on connecting tube 3-1 can to carry out recycle pump 3-2, the temperature sensor 3-3 of rotating, and the controller 3-4 being connected with recycle pump 3-2, temperature sensor 3-3 signal; The signal controlled circulation pump 3-2 forward or reverse that controller 3-4 feeds back according to temperature sensor 3-3, to realize circulation device 3 in the conversion rotated forward between loop module and reversion loop module.
For storing better and perform corresponding control command, being connected with instruction module 3-5 on controller 3-4, controller 3-4 passes through instruction module 3-5 controlled circulation pump 3-2 forward or reverse after identifying the signal that temperature sensor 3-3 feeds back.
As shown in Figure 3, in cyclic preheat process, when temperature sensor 3-3 detects return water temperature TBackwaterLower than design temperature TSettingTime, start recycle pump 3-2 by controller 3-4, carry out forward circulation (rotating forward), now water-heater detects that current start combustion heat heating by signal. When temperature sensor detects return water temperature TBackwaterReach set(ting)value TSettingTime, feed back to controller 3-4 immediately, controller 3-4 makes recycle pump 3-2 recycle back (reversion) by instruction module 3-5, now, water flow of water heater quantity sensor can't detect water-flow signal (output of non-water flow signal), water-heater stops the heating of water but still keeps the circulation of water, so just can reach the object of mixed water, makes in circulating line that even water temperature is constant everywhere. For ensureing the homogeneity of mixed water, recycle pump reversion is being not less than the 1/3 of the rotating forward time working time.
A kind of constant temp gas water heater that the present embodiment provides, by being built-in with an adjustable water circulating pump turned on circulation device, to change the direction of circulating water flow, thus accurately control the opening and closing of constant temp gas water heater, make water-heater economical operation in warm reasonable; Pre-heat effect reaches best, overcomes the functional deficiency of existing independent loops device. Meanwhile, circulation device comprises controller, temperature sensor, recycle pump, its control mode not only can accurate constant temperature, also there is forward circulation and start water-heater, recycle back does not start the antifreeze function in water-heater two kinds of situations.
Embodiment two
As shown in Figure 4, a kind of constant temp gas water heater that the present embodiment provides, its structure and embodiment one are basically identical, and difference is:
Described circulation device 3 comprises: connecting tube 3-1, recycle pump 3-2, temperature sensor (not shown), switchable first four-way valve 3-6 and the switchable 2nd four-way valve 3-7 being arranged on connecting tube 3-1, described first four-way valve 3-6, the 2nd four-way valve 3-7 connect the two ends of recycle pump 3-2 respectively, and a controller 3-4 is connected with temperature sensor, the first four-way valve 3-6, the 2nd four-way valve 3-7 signal; Controller 3-4 controls the first four-way valve 3-6 according to the signal of temperature sensor feedback, the 2nd four-way valve 3-7 switches the conversion turning to and realizing circulation device 3 between rotating forward loop module and reversion loop module.
Compared with embodiment one, the present embodiment only need to change the conducting direction of two four-way valves, and recycle pump is not had particular requirement, applicable in various recycle pump, and the problem also not having recycle pump reversion starting resistance big, effectively improves the work-ing life of circulation device.
Embodiment three
As shown in Figure 5, a kind of constant temp gas water heater that the present embodiment provides, its structure and embodiment one are basically identical, and difference is:
Described circulation device 3 comprises: connecting tube 3-1, the temperature sensor (not shown) being arranged on connecting tube 3-1, first recycle pump 3-8 and the first stopping valve 3-9, first recycle pump 3-8 and the first stopping valve 3-9 forms forward circulation module, the 2nd recycle pump 3-10 and the 2nd stopping valve 3-11 it is parallel with at the two ends of forward circulation module, the installation direction of the installation direction first recycle pump 3-8 of the 2nd recycle pump 3-10 is contrary, 2nd recycle pump 3-10 and the 2nd stopping valve 3-11 forms recycle back module, one controller 3-4 and described temperature sensor, forward circulation module, recycle back module by signal connects, controller 3-4 is according to the signal control forward circulation module of temperature sensor feedback or recycle back module work, realize circulation device in the conversion rotated forward between loop module and reversion loop module.
Concrete principle of work is: in cyclic preheat process, when temperature sensor detects return water temperature TBackwaterLower than design temperature TSettingTime, start the first recycle pump 3-8 by controller 3-4 and make the first stopping valve 3-9 conducting that the 2nd stopping valve 3-11 is blocked, carry out forward circulation, now water-heater detects that current start combustion heat heating by signal. When temperature sensor detects return water temperature TBackwaterReach set(ting)value TSettingTime, feed back to controller 3-4 immediately, controller 3-4 control first recycle pump 3-8 stop, start the 2nd recycle pump 3-10 and the first stopping valve 3-9 is blocked and makes the 2nd stopping valve 3-11 conducting, carry out recycle back, now, water flow of water heater quantity sensor can't detect water-flow signal (output of non-water flow signal), water-heater stops the heating of water but still keeps the circulation of water, the working time of the 2nd recycle pump is being not less than the 1/3 of the first pump operating cycle time, so just can reach the object of mixed water, make in circulating line that even water temperature is constant everywhere.
The essence of the present invention has been described in detail by above embodiment, but protection scope of the present invention can not be limited with this. It is appreciated that under the enlightenment of essence of the present invention, the art those of ordinary skill also can carry out many improvement and modification, it should be noted that these improve and modify within the claims all dropping on the present invention.
Claims (10)
1. a constant temp gas water heater, comprising: gas heater body, the circulating line being connected on gas heater body, and the circulation device being arranged on circulating line; It is characterized in that, described circulation device comprises forward circulation module and recycle back module, the fluid in circulating line under forward circulation module effect forward circulation or under the effect of recycle back module recycle back.
2. a kind of constant temp gas water heater according to claim 1, it is characterized in that, described circulation device comprises: connecting tube, is arranged on connecting tube can to carry out recycle pump, the temperature sensor of rotating, and the controller being connected with recycle pump, temperature sensor signal; Controller is according to the signal controlled circulation pump forward or reverse of temperature sensor feedback, it is achieved circulation device is in the conversion rotated forward between loop module and reversion loop module.
3. a kind of constant temp gas water heater according to claim 2, it is characterised in that, it is connected with instruction module on the controller, by instruction module controlled circulation pump forward or reverse after the signal of controller identification temperature sensor feedback.
4. a kind of constant temp gas water heater according to claim 1, it is characterized in that, described circulation device comprises: connecting tube, recycle pump, temperature sensor, switchable first four-way valve and switchable 2nd four-way valve being arranged on connecting tube, described first four-way valve, the 2nd four-way valve connect the two ends of recycle pump respectively, and a controller is connected with temperature sensor, the first four-way valve, the 2nd four-way valve signal; Controller controls the first four-way valve according to the signal of temperature sensor feedback, the 2nd four-way valve switching turns to and realizes circulation device in the conversion rotated forward between loop module and reversion loop module.
5. a kind of constant temp gas water heater according to claim 1, it is characterized in that, described circulation device comprises: connecting tube, the temperature sensor being arranged on connecting tube, first recycle pump and the first stopping valve, first recycle pump and the first stopping valve form forward circulation module, the 2nd recycle pump and the 2nd stopping valve it is parallel with at the two ends of forward circulation module, the installation direction of installation direction first recycle pump of the 2nd recycle pump is contrary, 2nd recycle pump and the 2nd stopping valve form recycle back module, one controller and described temperature sensor, forward circulation module, recycle back module by signal connects, controller is according to the signal control forward circulation module of temperature sensor feedback or recycle back module work, realize circulation device in the conversion rotated forward between loop module and reversion loop module.
6. a constant-temperature control method, it is used for realizing the thermostatic control of gas heater, it is characterized in that, by increasing a circulation device on the circulating line of gas heater, and utilize the forward circulation and the recycle back that just realize circulating line inner fluid to output and reverse output respectively of circulation device.
7. a kind of constant-temperature control method according to claim 6, it is characterised in that, the switching signal between described forward circulation and recycle back is produced by the temperature sensor being arranged on circulating line, and switching order is sent by controller; In the cyclic preheat process of gas heater, when temperature sensor detects return water temperature lower than set(ting)value, controller sends instruction control circulation device just to output, now gas heater detects that current start heating by signal, when temperature sensor detects that return water temperature reaches set(ting)value, controller sends instruction control circulation device and oppositely exports, now, gas heater can't detect water-flow signal to be stopped the heating of water but still keeps the circulation of water, reach the object of mixed water, make in circulating line that even water temperature is constant everywhere.
8. a kind of constant-temperature control method according to claim 6, it is characterised in that, described just realized by rotating and reverse of simple subprogram pump respectively to output and oppositely exporting.
9. a kind of constant-temperature control method according to claim 6, it is characterised in that, described just realized to output and oppositely exporting by two different recycle pumps that installation direction is contrary.
10. a kind of constant-temperature control method according to claim 6, it is characterised in that, described just realize to output and oppositely exporting by being arranged on the switchable four-way valve at recycle pump two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610151473.0A CN105627581B (en) | 2016-03-16 | 2016-03-16 | A kind of constant temp gas water heater and constant-temperature control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610151473.0A CN105627581B (en) | 2016-03-16 | 2016-03-16 | A kind of constant temp gas water heater and constant-temperature control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105627581A true CN105627581A (en) | 2016-06-01 |
| CN105627581B CN105627581B (en) | 2018-09-11 |
Family
ID=56042750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610151473.0A Active CN105627581B (en) | 2016-03-16 | 2016-03-16 | A kind of constant temp gas water heater and constant-temperature control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105627581B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152521A (en) * | 2016-08-04 | 2016-11-23 | 广东万家乐燃气具有限公司 | A kind of capable of self-circulating circulating device and there is the water heater of this circulating device |
| CN106403253A (en) * | 2016-08-26 | 2017-02-15 | 广东万家乐燃气具有限公司 | Hot water circulating method and device with water proportional valve |
| CN112097400A (en) * | 2020-08-31 | 2020-12-18 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater control method and gas water heater |
| CN112394759A (en) * | 2020-11-02 | 2021-02-23 | 佛山市水晶岛休闲设备有限公司 | Method for controlling water temperature by multi-mode temperature control system |
| CN112774597A (en) * | 2021-02-23 | 2021-05-11 | 轻工业环境保护研究所 | Double-tank circulating hydrothermal reaction device and operation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006034275A1 (en) * | 2006-07-21 | 2008-01-24 | Stiebel Eltron Gmbh & Co. Kg | Water heater comprises a nozzle or a water jet pump operating according to the Venturi principle and having a safety valve on an air inlet |
| CN101699186A (en) * | 2009-10-23 | 2010-04-28 | 林志辉 | High-efficiency water tank for heat pump water heater |
| CN203336843U (en) * | 2013-07-10 | 2013-12-11 | 上海林内有限公司 | Gas water heater control system |
| CN204786682U (en) * | 2015-05-04 | 2015-11-18 | 广东众辰科技有限公司 | Constant temperature constant current hot -water heating system |
| CN105115160A (en) * | 2015-09-09 | 2015-12-02 | 芜湖美的厨卫电器制造有限公司 | Water mixing device and water mixing system with same |
| CN205536574U (en) * | 2016-03-16 | 2016-08-31 | 广东万家乐燃气具有限公司 | Constant -temperature gas water heater |
-
2016
- 2016-03-16 CN CN201610151473.0A patent/CN105627581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006034275A1 (en) * | 2006-07-21 | 2008-01-24 | Stiebel Eltron Gmbh & Co. Kg | Water heater comprises a nozzle or a water jet pump operating according to the Venturi principle and having a safety valve on an air inlet |
| CN101699186A (en) * | 2009-10-23 | 2010-04-28 | 林志辉 | High-efficiency water tank for heat pump water heater |
| CN203336843U (en) * | 2013-07-10 | 2013-12-11 | 上海林内有限公司 | Gas water heater control system |
| CN204786682U (en) * | 2015-05-04 | 2015-11-18 | 广东众辰科技有限公司 | Constant temperature constant current hot -water heating system |
| CN105115160A (en) * | 2015-09-09 | 2015-12-02 | 芜湖美的厨卫电器制造有限公司 | Water mixing device and water mixing system with same |
| CN205536574U (en) * | 2016-03-16 | 2016-08-31 | 广东万家乐燃气具有限公司 | Constant -temperature gas water heater |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152521A (en) * | 2016-08-04 | 2016-11-23 | 广东万家乐燃气具有限公司 | A kind of capable of self-circulating circulating device and there is the water heater of this circulating device |
| CN106152521B (en) * | 2016-08-04 | 2022-03-22 | 广东万家乐燃气具有限公司 | Circulating device capable of self-circulating and water heater with circulating device |
| CN106403253A (en) * | 2016-08-26 | 2017-02-15 | 广东万家乐燃气具有限公司 | Hot water circulating method and device with water proportional valve |
| CN112097400A (en) * | 2020-08-31 | 2020-12-18 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater control method and gas water heater |
| CN112394759A (en) * | 2020-11-02 | 2021-02-23 | 佛山市水晶岛休闲设备有限公司 | Method for controlling water temperature by multi-mode temperature control system |
| CN112774597A (en) * | 2021-02-23 | 2021-05-11 | 轻工业环境保护研究所 | Double-tank circulating hydrothermal reaction device and operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105627581B (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105627581A (en) | Constant-temperature gas water heater and constant-temperature control method | |
| CN101711330B (en) | Hot water supplying system | |
| CN104949325A (en) | Small-sized water storage type constant-temperature electric water heater for water using terminals | |
| RU2010152811A (en) | HOT WATER SUPPLY SYSTEM SUPPORTING CONSTANT TEMPERATURE OF HOT WATER | |
| CN102444983A (en) | Device and method for hot water circulation based on instant water heater | |
| US20120255507A1 (en) | Hot water supply system | |
| CN104110856A (en) | Water heater system | |
| US12025322B2 (en) | Integrated recirculation pump for non-condensing water heater | |
| CN108444094A (en) | A kind of thermostatic type central heater and control method | |
| CN104188528A (en) | Instant-heating water dispenser and control method thereof | |
| JP2007333332A (en) | Hot water storage type heating apparatus | |
| JP2012225544A (en) | Storage water heater | |
| CN207989797U (en) | A kind of multifunction valve, zero cold water water heater | |
| CN104405731A (en) | Hydraulic oil liquid heating system | |
| CN205536574U (en) | Constant -temperature gas water heater | |
| CN203949373U (en) | Water-heater system | |
| CN106152521A (en) | A kind of capable of self-circulating circulating device and there is the water heater of this circulating device | |
| CN104848522A (en) | Preheating and instantaneous heating dual-mode electric water heater | |
| CN106152484B (en) | Quick-heating water-storage type electric water heater | |
| CN103591636A (en) | Double-tank heat exchange and water supply system and method for controlling same | |
| CN204438317U (en) | Fire the heating tube temperature Control Component of electric complementary hot-water system and electric heater | |
| CN110953727A (en) | Constant temperature control method of gas water heater | |
| CN204300044U (en) | Hydraulic oil liquid heating system | |
| CN204033118U (en) | A kind of instant heating type drinking machine | |
| CN104879557A (en) | Intelligent thermostatic valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |