CN107781993A - Water heater double-tube heat exchanger water pipe cleaning method and water heater - Google Patents
Water heater double-tube heat exchanger water pipe cleaning method and water heater Download PDFInfo
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- CN107781993A CN107781993A CN201610792531.8A CN201610792531A CN107781993A CN 107781993 A CN107781993 A CN 107781993A CN 201610792531 A CN201610792531 A CN 201610792531A CN 107781993 A CN107781993 A CN 107781993A
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- heat exchanger
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- tube heat
- water heater
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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
- F24H9/0005—Details for water heaters
- F24H9/0042—Cleaning arrangements
-
- 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
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- 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)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention relates to technical field of water heaters, more particularly to a kind of water heater double-tube heat exchanger water pipe cleaning method and water heater.Water heater double-tube heat exchanger water pipe cleaning method is specially：When the thermal resistance of double-tube heat exchanger is more than preset value, the water pipe of the double-tube heat exchanger of water heater is cleaned.Wherein, preset value corresponds to the thermal resistance value of slight dirt deposits (dirt will not form block) on pipe inner wall.Thus, using the thermal resistance of double-tube heat exchanger as foundation, the operation of cleaning water pipe can automatically, be periodically started, just by dirt removal, and then to avoid depositing a large amount of dirts on pipe inner wall when slight dirt deposits on pipe inner wall.Water heater applies above-mentioned water heater double-tube heat exchanger water pipe cleaning method, and its double-tube heat exchanger pipe inner wall will not deposit a large amount of dirts.
Description
Technical field
The present invention relates to technical field of water heaters, more particularly to a kind of water heater double-tube heat exchanger water pipe cleaning method and heat
Hydrophone.
Background technology
Water heater is heated using double-tube heat exchanger to current more, and double-tube heat exchanger includes two pipes being set-located
Road, the pipeline that current are flowed through are called water pipe.Often there is scale formation in the inwall of the water pipe of double-tube heat exchanger, and dirtiness resistance occupies
A big chunk of heat exchange entire thermal resistance, causing the heat exchange efficiency of whole double-tube heat exchanger reduces, form the significant wastage of the energy.
At present, user can ignore the water pipe cleaning in double-tube heat exchanger mostly, that is to say, that unless water heater is asked
Topic, otherwise will not be aware of the water pipe needed in cannula cleaning heat exchanger；Or when needing the water in cannula cleaning heat exchanger
Guan Shi, a large amount of dirts (such as dirt has lumpd) have been deposited on pipe inner wall, and cleaning is difficult.
Therefore, a kind of water heater double-tube heat exchanger water pipe cleaning that can avoid depositing a large amount of dirts on pipe inner wall is needed badly
Method and pipe inner wall will not deposit the water heater of a large amount of dirts.
The content of the invention
On the one hand the purpose of the present invention is：It is proposed that one kind can avoid depositing a large amount of dirts on double-tube heat exchanger pipe inner wall
The water heater double-tube heat exchanger water pipe cleaning method of dirt.
The purpose of the present invention further aspect is that：It is proposed that a kind of double-tube heat exchanger pipe inner wall will not deposit a large amount of dirts
Water heater.
To use following technical scheme up to this purpose, the present invention：
One aspect of the present invention provides a kind of water heater double-tube heat exchanger water pipe cleaning method, big in the thermal resistance of double-tube heat exchanger
When preset value, the water pipe of the double-tube heat exchanger of water heater is cleaned.
According to the present invention, comprise the following steps：S1, unit start shooting operation preset time after, calculate double-tube heat exchanger
Thermal resistance；S2, judge whether the thermal resistance of double-tube heat exchanger is more than preset value, if so, the water of the double-tube heat exchanger of cleaning water heater
Pipe, if it is not, then terminating cleaning procedure.
According to the present invention, S1, after unit starts shooting operation preset time calculates the thermal resistance of double-tube heat exchanger；S2, judgement
Whether the thermal resistance of double-tube heat exchanger is more than preset value, if so, step S3 is then performed, if it is not, then terminating cleaning procedure；S3, judgement
Whether water tank water temperature reaches preset temperature, if so, step S4 is then performed, if it is not, water tank water temperature then is heated into preset temperature；
S4, judge whether user uses water, if so, then return to step S3, if it is not, then cleaning the water pipe of the double-tube heat exchanger of water heater.
According to the present invention, step S4 includes following sub-step：S4.1, detect water heater water tank in fluctuating temperature feelings
Condition；S4.2, whether user is judged according to fluctuating temperature situation with water, if so, then return to step S3, if it is not, then performing step
S4.3；S4.3, clean water heater double-tube heat exchanger water pipe.
According to the present invention, the step of the water pipe for the double-tube heat exchanger for cleaning water heater in：Make current entrainment collision ball in water
Flowed in pipe, the inwall that ball and water pipe are collided during current flow constantly rubs, and removes the dirt on inwall.
According to the present invention, collision ball is bouncing ball.
Include following sub-step according to the present invention, the step of the water pipe for the double-tube heat exchanger for cleaning water heater：Step a, control
The current of system entrainment collision ball flowed for the first predetermined flow time in water pipe in the first direction；Step b, current are controlled to stop stream
The dynamic first preset stopping time；Step c, control current flowed for the first predetermined flow time in water pipe in a second direction；Step
D, current are controlled to stop the second predetermined flow time of flowing；Step e, return to step a, until returning preset times.
According to the present invention, current are controlled alternately to be flowed with second direction in the first direction using reversing arrangement；Reversing arrangement
Including the first upper hose connected with one end of sleeve pipe water pipe and the first downcomer, connected with the other end of sleeve pipe water pipe second
Upper hose and the second downcomer and it is respectively arranged on the first upper hose, the first downcomer, the second upper hose and the second downcomer
The first water supply valve, first time water valve, the second water supply valve and second time water valve.
According to the present invention, the first upper hose and the second upper hose are connected to total upper hose, and water pump is provided with total upper hose；
In step a：Keep the first water supply valve and second time water valve is opened simultaneously while the second water supply valve of holding and first time water valve are closed,
Start water pump and keep it to operate for the first predetermined flow time；In stepb：Switch off the pump and keep water pump to shut down first
The preset stopping time；In step c：Keep the second water supply valve and first time water valve is opened and the first water supply valve of holding and the simultaneously
Two times water valve is closed, and is started water pump and is kept it to operate for the second predetermined flow time；In step d：Switch off the pump and keep water
Pump shut down for the second preset stopping time.
Another aspect of the present invention provides a kind of water heater, and the water heater is using any of the above-described water heater double-tube heat exchanger
The water heater of water pipe cleaning method.
The above-mentioned technical proposal of the present invention has the following advantages that：
The water heater double-tube heat exchanger water pipe cleaning method of the present invention, when the thermal resistance of double-tube heat exchanger is more than preset value,
Clean the water pipe of the double-tube heat exchanger of water heater.Wherein, (dirt will not corresponding to slight dirt deposits on pipe inner wall for preset value
Form block) thermal resistance value.Thus, using the thermal resistance of double-tube heat exchanger as foundation, the behaviour of cleaning water pipe can automatically, be periodically started
Make, just by dirt removal, and then to avoid depositing on pipe inner wall a large amount of dirty when slight dirt deposits on pipe inner wall
Dirt.
The water heater of the present invention, using above-mentioned water heater double-tube heat exchanger water pipe cleaning method, its double-tube heat exchanger water pipe
Inwall will not deposit a large amount of dirts.
Brief description of the drawings
Fig. 1 is the flow chart for the water heater double-tube heat exchanger water pipe cleaning method that the specific embodiment of the invention provides；
Fig. 2 is the double-tube heat exchanger and reversing arrangement used in Fig. 1 water heater double-tube heat exchanger water pipe cleaning method
Structural representation；
Fig. 3 is the partial structural diagram of Fig. 2 double-tube heat exchanger, wherein including collision ball.
In figure：
1：Double-tube heat exchanger；2：Water pipe；3：Reversing arrangement；4：First upper hose；5：First downcomer；6：Water on second
Pipe；7：Second downcomer；8：First water supply valve；9：First time water valve；10：Second water supply valve；11：Second time water valve；12：On total
Water pipe；13：Total downcomer；14：Water pump；15：Collide ball 15.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Embodiment one
Referring to figs. 1 to Fig. 3, in the present embodiment, there is provided a kind of water heater double-tube heat exchanger water pipe cleaning method, specifically
For：When the thermal resistance of double-tube heat exchanger 1 is more than preset value, the water pipe 2 of the double-tube heat exchanger 1 of water heater is cleaned.Wherein, preset value
Corresponding to the thermal resistance value of slight dirt deposits on the inwall of water pipe 2, namely when dirt on the inwall of water pipe 2 does not form block also
Thermal resistance value.Clean the mode of the water pipe 2 of the double-tube heat exchanger 1 of water heater, the automated cleaning mode carried using water heater.
Thus, using the thermal resistance of double-tube heat exchanger 1 as foundation, can automatically, periodically start cleaning water pipe 2 operation, with
Just by dirt removal when slight dirt deposits on the inwall of water pipe 2, and then avoid depositing a large amount of dirts on the inwall of water pipe 2.
Further, reference picture 1, in the present embodiment, water heater double-tube heat exchanger water pipe cleaning method comprise the following steps：
S1, after unit starts shooting operation preset time (such as 30min), read parameters, calculate double-tube heat exchanger 1
Thermal resistance.The thermal resistance of double-tube heat exchanger 1 when can obtain steady working condition using preset time as node.
S2, judge whether the thermal resistance of double-tube heat exchanger 1 is more than preset value, if so, step S3 is then performed, if it is not, then terminating
Cleaning procedure.
S3, judge whether water tank water temperature reaches preset temperature (the expectation water temperature that the preset temperature inputs for user), if so,
Step S4 is then performed, if it is not, water tank water temperature then is heated into preset temperature；
S4, judge whether user uses water, if so, then return to step S3, if it is not, then cleaning the double-tube heat exchanger 1 of water heater
Water pipe 2.
By step S3 and step S4 judgement, it can preferentially meet that user's uses water and water temperature demand.
In the present embodiment, in step s 4, user is determined either with or without with water by the fluctuating temperature situation in water tank,
Specially following sub-step：
S4.1, detect water heater water tank in fluctuating temperature situation；
S4.2, whether user is judged according to fluctuating temperature situation with water, if so, then return to step S3, if it is not, then performing
Step S4.3；
S4.3, clean water heater double-tube heat exchanger 1 water pipe 2.
Certainly, the present invention is not limited to this, in other embodiments, can also be determined using other modes user whether with
Water, for example, setting whether sensor there are flowing out to detect in outlet pipe on outlet pipe.
Further, in the present embodiment, reference picture 2 and Fig. 3, the step of water pipe 2 for the double-tube heat exchanger 1 for cleaning water heater
In (step S4.3), current entrainment collision ball 15 is flowed in water pipe 2, ball 15 and water pipe are collided during current flow
2 inwall constantly rubs, and dirt loosens, come off, and is excluded with current, and then removes the dirt on inwall.In the present embodiment, touch
Billiards 15 is bouncing ball, on the one hand bouncing ball will not damage the inwall of water pipe 2, on the other hand touches wall by it and quickly rebounds to increase
Rebuffed number, and then increase elimination efficiency.Preferably, filter screen is provided with the both ends of the water pipe 2 of double-tube heat exchanger, ball will be collided
15 are limited in the water pipe 2 of double-tube heat exchanger, and during no clean, collision ball 15 is also stayed in water pipe, now also can be with water
Tube wall collides decontamination.
Certainly, the present invention is not limited to this, and the automatic cleaning mode that other water heaters can be used to carry is cleaned, such as
Chemical cleaning mode.
Further, in the present embodiment, current are controlled alternately to be flowed with second direction in the first direction using reversing arrangement 3
It is dynamic.Reversing arrangement 3 includes the first upper hose 4 for connect with one end of sleeve pipe water pipe 2 and the first downcomer 5 and sleeve pipe water pipe 2
The second upper hose 6 and the second downcomer 7 and be respectively arranged on the first upper hose 4, the first downcomer 5, second that the other end connects
The first water supply valve 8, first time water valve 9, the second water supply valve 10 and second time water valve 11 on the downcomer 7 of upper hose 6 and second.Its
In, when the first water supply valve 8 is opened, the first upper hose 4 turns on, and when the first water supply valve 8 is closed, the first upper hose 4 disconnects；On second
When water valve 10 is opened, the second upper hose 6 turns on, and when the second water supply valve 10 is closed, the second upper hose 6 disconnects；First time water valve 9 is beaten
When opening, the first downcomer 5 turns on, and when first time water valve 9 is closed, the first downcomer 5 disconnects；During second time opening of water valve 11, the
Two downcomers 7 turn on, and when second time water valve 11 is closed, the second downcomer 7 disconnects.Also, the first upper hose 4 and the second upper hose
6 are connected to total upper hose 12, and water pump 14 is provided with total upper hose 12.First water supply valve 8, first time water valve 9, the second water supply valve
10 and second time water valve 11 be both preferably magnetic valve.
Specifically, the step of cleaning water pipe 2 of the double-tube heat exchanger 1 of water heater (step S4.3) includes following sub-step：
Step a, the first water supply valve 8 and second time water valve 11 is kept to open and keep simultaneously under the second water supply valve 10 and first
Water valve 9 is closed, and is started water pump 14 and is kept it to operate for the first predetermined flow time, thus, the current of control entrainment collision ball 15
The first predetermined flow time (preferably the first predetermined flow time is 3min) is flowed in water pipe 2 in the first direction, specifically, water
Stream flow to total downcomer 13 from total upper hose 14 through the first upper hose 4, the water pipe 2 of double-tube heat exchanger, the second downcomer 7；
Step b, switch off the pump and 14 and keep water pump 14 to shut down for the first preset stopping time, thus control current to stop
Flow the first preset stopping time (preferably the first preset stopping time is 2min)；
Step c, the second water supply valve 10 and first time water valve 9 is kept to open and keep simultaneously under the first water supply valve 8 and second
Water valve 11 is closed, and is started water pump 14 and is kept it to operate for the second predetermined flow time, thus controls current in a second direction in water
The second predetermined flow time (preferably the second predetermined flow time is equal with the first predetermined flow time, is 3min) is flowed in pipe 2,
Specifically, current flow to Zong Xiashui from total upper hose 12 through the second upper hose 6, the water pipe 2 of double-tube heat exchanger 1, the first downcomer 5
Pipe 13；
Step d, switch off the pump and 14 and keep water pump 14 to shut down for the second preset stopping time, thus control current to stop
Flow the second preset stopping time (preferably the second preset stopping time is equal with the first preset stopping time, is 2min)；
Step e, return to step a, until returning preset times (being preferably 3 times), i.e., until step a to step d is performed
Preset times, subsequently into holding state.
Certainly, the present invention is not limited to this, also can remove above-mentioned steps S3 and S4, in step s 2, judges sleeve heat exchange
Whether the thermal resistance of device 1 is more than preset value, if so, the water pipe 2 of the double-tube heat exchanger 1 of cleaning water heater, if it is not, then terminating to clean journey
Sequence.
Embodiment two
In the present embodiment, there is provided a kind of water heater, the water heater are the water heater double-tube heat exchanger of Application Example one
Water pipe cleaning method, the inwall of the water pipe 2 of its double-tube heat exchanger 1 will not deposit a large amount of dirts.
Specifically, refer to Fig. 1 to Fig. 3, the water heater of the present embodiment include control module, above-mentioned double-tube heat exchanger 1, on
Reversing arrangement 3, total upper hose 12 and total downcomer 13 are stated, collision ball 15 is provided with the water pipe 2 of double-tube heat exchanger 1, in water pipe 2
Both ends set filter screen, will collision ball 15 be limited in water pipe 2.Control module controls the water heater in double-tube heat exchanger 1
When thermal resistance is more than preset value, the water pipe 2 of the double-tube heat exchanger 1 of water heater is cleaned.Wherein, preset value corresponds on the inwall of water pipe 2
The thermal resistance value of slight dirt deposits, namely thermal resistance value when dirt on the inwall of water pipe 2 does not form block also.Clean water heater
Double-tube heat exchanger 1 water pipe 2 mode, the automated cleaning mode carried using water heater.
More specifically, the water heater of the present embodiment performs following cleaning step：
S1, control module read parameters, calculate set after unit starts shooting operation preset time (such as 30min)
The thermal resistance of heat exchange of heat pipe 1.The thermal resistance of double-tube heat exchanger 1 when can obtain steady working condition using preset time as node.
The thermal resistance calculated compared with preset value, is judged whether the thermal resistance of double-tube heat exchanger 1 is more than in advance by S2, control module
If value, if so, step S3 is then performed, if it is not, then terminating cleaning procedure.
S3, control module judge whether water tank water temperature reaches preset temperature (the expectation water that the preset temperature inputs for user
Temperature), if so, step S4 is then performed, if it is not, water tank water temperature then is heated into preset temperature；
S4.1, control module control associated components detect the fluctuating temperature situation in the water tank of water heater；
Whether S4.2, control module judge user with water according to fluctuating temperature situation, if so, then return to step S3, if
No, then performing step S4.3, (step S4.3 comprises the following steps a- steps e)；
Step a, control module controls the first water supply valve 8 and second time water valve 11 to open and control the second water supply valve 10 simultaneously
Closed with first time water valve 9, and control module starts water pump 14 and keeps it to operate for the first predetermined flow time, thus, control
The current of system entrainment collision ball 15 flow first predetermined flow time (preferably the first predetermined flow in water pipe 2 in the first direction
Time is 3min), specifically, current from total upper hose 12 through the first upper hose 4, the water pipe 2 of double-tube heat exchanger, the second downcomer
7 flow to total downcomer 13；
Step b, control module control water pump 14 is closed and controls water pump 14 to keep shutting down for the first preset stopping time,
Thus control current to stop flowing the first preset stopping time (preferably the first preset stopping time is 2min)；
Step c, control module controls the second water supply valve 10 and first time water valve 9 to open and control the first water supply valve 8 simultaneously
Closed with second time water valve 11, and control water pump 14 to start and keep it to operate for the second predetermined flow time, thus control water
Stream flows the second predetermined flow time (preferably the second predetermined flow time and the first predetermined flow in water pipe 2 in a second direction
Time is equal, is 3min), specifically, current are from water pipe 2, first of total upper hose 12 through the second upper hose 6, double-tube heat exchanger 1
Downcomer 5 flow to total downcomer 13；
Step d, control module control water pump 14 is closed and keeps water pump 14 to shut down for the second preset stopping time, thus
Control current stopping the second preset stopping time of flowing (preferably the second preset stopping time is equal with the first preset stopping time,
For 2min)；
Step e, return to step a, until returning preset times (being preferably 3 times), i.e., until step a to step d is performed
Preset times, subsequently into holding state.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area
Personnel would not require any inventive effort the other embodiments that can associate the present invention, and these modes are fallen within
Within protection scope of the present invention.
Claims (10)
- A kind of 1. water heater double-tube heat exchanger water pipe cleaning method, it is characterised in that：When the thermal resistance of double-tube heat exchanger is more than preset value, the water pipe of the double-tube heat exchanger of water heater is cleaned.
- 2. water heater double-tube heat exchanger water pipe cleaning method according to claim 1, it is characterised in that including following step Suddenly：S1, after unit starts shooting operation preset time, calculate the thermal resistance of double-tube heat exchanger；S2, judge whether the thermal resistance of described sleeve pipe heat exchanger is more than preset value, if so, the water of the double-tube heat exchanger of cleaning water heater Pipe, if it is not, then terminating cleaning procedure.
- 3. water heater double-tube heat exchanger water pipe cleaning method according to claim 1, it is characterised in thatS1, after unit starts shooting operation preset time, calculate the thermal resistance of double-tube heat exchanger；S2, judge whether the thermal resistance of described sleeve pipe heat exchanger is more than preset value, if so, step S3 is then performed, if it is not, then terminating clear Washing procedure；S3, judge whether water tank water temperature reaches preset temperature, if so, step S4 is then performed, if it is not, being then heated to water tank water temperature Preset temperature；S4, judge whether user uses water, if so, the step S3 is then returned to, if it is not, then cleaning the sleeve heat exchange of the water heater The water pipe of device.
- 4. water heater double-tube heat exchanger water pipe cleaning method according to claim 3, it is characterised in thatThe step S4 includes following sub-step：S4.1, the detection water heater water tank in fluctuating temperature situation；S4.2, whether user is judged according to the fluctuating temperature situation with water, if so, the step S3 is then returned to, if it is not, then Perform step S4.3；S4.3, clean water heater double-tube heat exchanger water pipe.
- 5. the water heater double-tube heat exchanger water pipe cleaning method according to any one of claim 1-4, it is characterised in thatIn the step of cleaning the water pipe of the double-tube heat exchanger of water heater：Current entrainment collision ball is set to be flowed in water pipe, in current The inwall of the collision ball and the water pipe constantly rubs during flowing, removes the dirt on the inwall.
- 6. water heater double-tube heat exchanger water pipe cleaning method according to claim 5, it is characterised in thatThe collision ball is bouncing ball.
- 7. water heater double-tube heat exchanger water pipe cleaning method according to claim 5, it is characterised in thatThe step of water pipe for cleaning the double-tube heat exchanger of water heater, includes following sub-step：Step a, the current of control entrainment collision ball flowed for the first predetermined flow time in water pipe in the first direction；Step b, the current are controlled to stop the first preset stopping time of flowing；Step c, the current are controlled to flow for the second predetermined flow time in water pipe in a second direction；Step d, the current are controlled to stop the second preset stopping time of flowing；Step e, the step a is returned to, until returning preset times.
- 8. water heater double-tube heat exchanger water pipe cleaning method according to claim 7, it is characterised in thatThe current are controlled alternately to be flowed along the first direction and the second direction using reversing arrangement；The reversing arrangement includes the first upper hose connected with one end of described sleeve pipe water pipe and the first downcomer and the set The second upper hose and the second downcomer of the other end connection of pipe water pipe and it is respectively arranged on first upper hose, described the One downcomer, second upper hose and the first water supply valve on second downcomer, first time water valve, the second water supply valve and Second time water valve.
- 9. water heater double-tube heat exchanger water pipe cleaning method according to claim 8, it is characterised in thatFirst upper hose and second upper hose are connected to total upper hose, and water pump is provided with total upper hose；In step a：First water supply valve and second time water valve is kept to open and keep second water supply valve simultaneously Closed with first time water valve, start water pump and keep it to operate the first predetermined flow time；In stepb：Close the water pump and keep the water pump to shut down the first preset stopping time；In step c：Second water supply valve and first time water valve is kept to open and keep first water supply valve simultaneously Closed with second time water valve, start water pump and keep it to operate the second predetermined flow time；In step d：Close the water pump and keep the water pump to shut down the second preset stopping time.
- 10. a kind of water heater, it is characterised in that the water heater is the water heater any one of using claim 1-9 The water heater of double-tube heat exchanger water pipe cleaning method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792531.8A CN107781993B (en) | 2016-08-31 | 2016-08-31 | Water pipe cleaning method for water heater sleeve heat exchanger and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792531.8A CN107781993B (en) | 2016-08-31 | 2016-08-31 | Water pipe cleaning method for water heater sleeve heat exchanger and water heater |
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| CN107781993A true CN107781993A (en) | 2018-03-09 |
| CN107781993B CN107781993B (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112057941A (en) * | 2020-09-04 | 2020-12-11 | 刘舜 | Pump valve filter screen |
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| CN204612279U (en) * | 2015-04-27 | 2015-09-02 | 青岛海尔空调电子有限公司 | For warning device and the fouling auto-alarming heat exchanger of fouling of heat exchangers |
| CN105135693A (en) * | 2015-10-16 | 2015-12-09 | 珠海格力电器股份有限公司 | Method and device for detecting scaling quantity of water heater and casing thereof |
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| CN112057941A (en) * | 2020-09-04 | 2020-12-11 | 刘舜 | Pump valve filter screen |
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Effective date of registration: 20201110 Address after: 266431, Shandong, Qingdao province Jiaonan hidden Town Street office Cloud Road No. 67 Patentee after: QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE Co.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 266431, Shandong, Qingdao province Jiaonan hidden Town Street office Cloud Road No. 67 Patentee before: QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE Co.,Ltd. |