CN107781993B - Water pipe cleaning method for water heater sleeve heat exchanger and water heater - Google Patents
Water pipe cleaning method for water heater sleeve heat exchanger and water heater Download PDFInfo
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- CN107781993B CN107781993B CN201610792531.8A CN201610792531A CN107781993B CN 107781993 B CN107781993 B CN 107781993B CN 201610792531 A CN201610792531 A CN 201610792531A CN 107781993 B CN107781993 B CN 107781993B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 412
- 238000004140 cleaning Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000007599 discharging Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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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
- F24H9/20—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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to the technical field of water heaters, in particular to a method for cleaning a water pipe of a water heater sleeve heat exchanger and a water heater. The method for cleaning the water pipe of the water heater sleeve heat exchanger specifically comprises the following steps: and when the thermal resistance of the double-pipe heat exchanger is greater than a preset value, cleaning a water pipe of the double-pipe heat exchanger of the water heater. Wherein the preset value corresponds to a thermal resistance value of a slight deposition of dirt (dirt is not agglomerated) on the inner wall of the water pipe. Therefore, the operation of cleaning the water pipe can be automatically and periodically started based on the thermal resistance of the double-pipe heat exchanger, so that dirt can be removed when the dirt is slightly deposited on the inner wall of the water pipe, and further a large amount of dirt is prevented from being deposited on the inner wall of the water pipe. The water heater applies the cleaning method for the water pipe of the double-pipe heat exchanger of the water heater, and the inner wall of the water pipe of the double-pipe heat exchanger cannot deposit a large amount of dirt.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a method for cleaning a water pipe of a water heater sleeve heat exchanger and a water heater.
Background
The water heater mostly adopts a double-pipe heat exchanger to heat water flow, the double-pipe heat exchanger comprises two pipelines which are sleeved together, and the pipeline through which the water flow flows is called a water pipe. The inner wall of the water pipe of the double-pipe heat exchanger is often scaled, and the fouling thermal resistance occupies a large part of the total heat exchange thermal resistance, so that the heat exchange efficiency of the whole double-pipe heat exchanger is reduced, and the great waste of energy is formed.
At present, most users neglect cleaning of water pipes in the double-pipe heat exchanger, that is, the users cannot perceive the need of cleaning the water pipes in the double-pipe heat exchanger unless the water heater has problems; alternatively, by the time the water tubes in the double tube heat exchanger need to be cleaned, a large amount of dirt has been deposited on the inner walls of the water tubes (e.g., the dirt has agglomerated), making cleaning difficult.
Therefore, a method for cleaning a water pipe of a pipe heat exchanger of a water heater, which can prevent a large amount of dirt from being deposited on the inner wall of the water pipe, and a water heater, in which a large amount of dirt is not deposited on the inner wall of the water pipe, are needed.
Disclosure of Invention
The invention aims at one aspect that: the cleaning method for the water pipe of the double-pipe heat exchanger of the water heater can avoid a large amount of dirt deposited on the inner wall of the water pipe of the double-pipe heat exchanger.
Another aspect of the present invention is directed to: the water heater with the double-pipe heat exchanger has the advantage that a large amount of dirt cannot be deposited on the inner wall of the water pipe of the double-pipe heat exchanger.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for cleaning a water pipe of a double-pipe heat exchanger of a water heater, which is used for cleaning the water pipe of the double-pipe heat exchanger of the water heater when the thermal resistance of the double-pipe heat exchanger is greater than a preset value.
According to the invention, the method comprises the following steps: s1, calculating the thermal resistance of the double-pipe heat exchanger after the unit is started to operate for a preset time; and S2, judging whether the thermal resistance of the double-pipe heat exchanger is larger than a preset value, if so, cleaning a water pipe of the double-pipe heat exchanger of the water heater, and if not, ending the cleaning procedure.
According to the invention, S1, calculating the thermal resistance of the double-pipe heat exchanger after the unit is started and runs for a preset time; s2, judging whether the thermal resistance of the double-pipe heat exchanger is larger than a preset value, if so, executing a step S3, and if not, ending the cleaning program; s3, judging whether the water temperature of the water tank reaches the preset temperature, if so, executing a step S4, and if not, heating the water temperature of the water tank to the preset temperature; and S4, judging whether the user uses water, if so, returning to the step S3, and if not, cleaning a water pipe of the double-pipe heat exchanger of the water heater.
According to the invention, step S4 includes the following sub-steps: s4.1, detecting the water temperature fluctuation condition in a water tank of the water heater; s4.2, judging whether the user uses water or not according to the water temperature fluctuation condition, if so, returning to the step S3, and if not, executing the step S4.3; and S4.3, cleaning a water pipe of the sleeve pipe heat exchanger of the water heater.
According to the invention, in the step of cleaning the water pipe of the double-pipe heat exchanger of the water heater: the collision ball is carried by the water flow to flow in the water pipe, and the collision ball continuously rubs the inner wall of the water pipe in the flowing process of the water flow to remove dirt on the inner wall.
According to the invention, the collision ball is a bouncing ball.
According to the invention, the step of cleaning the water pipe of the double pipe heat exchanger of the water heater comprises the following substeps: step a, controlling water flow carrying collision balls to flow in a water pipe along a first direction for a first preset flow time; b, controlling water flow to stop flowing for a first preset stop time; c, controlling the water flow to flow in the water pipe along a second direction for a first preset flow time; d, controlling the water flow to stop flowing for a second preset flowing time; and e, returning to the step a until the preset times are returned.
According to the invention, the water flow is controlled to alternately flow along a first direction and a second direction by adopting a reversing device; the reversing device comprises a first upper water pipe and a first lower water pipe which are communicated with one end of the sleeve water pipe, a second upper water pipe and a second lower water pipe which are communicated with the other end of the sleeve water pipe, and a first water feeding valve, a first lower water valve, a second water feeding valve and a second lower water valve which are respectively arranged on the first upper water pipe, the first lower water pipe, the second upper water pipe and the second lower water pipe.
According to the invention, the first water supply pipe and the second water supply pipe are connected to the main water supply pipe, and the main water supply pipe is provided with a water pump; in step a: keeping the first water feeding valve and the second water discharging valve open and keeping the second water feeding valve and the first water discharging valve closed at the same time, starting the water pump and keeping the water pump running for a first preset flow time; in step b: turning off the water pump and keeping the water pump to stop running for a first preset stop time; in step c: keeping the second water feeding valve and the first water discharging valve open and keeping the first water feeding valve and the second water discharging valve closed at the same time, starting the water pump and keeping the water pump running for a second preset flow time; in step d: and turning off the water pump and keeping the water pump to stop running for a second preset stop time.
The invention further provides a water heater, and the water heater is a water heater applying any one of the above water heater sleeve heat exchanger water pipe cleaning methods.
The technical scheme of the invention has the following advantages:
according to the method for cleaning the water pipe of the double-pipe heat exchanger of the water heater, when the thermal resistance of the double-pipe heat exchanger is larger than a preset value, the water pipe of the double-pipe heat exchanger of the water heater is cleaned. Wherein the preset value corresponds to a thermal resistance value of a slight deposition of dirt (dirt is not agglomerated) on the inner wall of the water pipe. Therefore, the operation of cleaning the water pipe can be automatically and periodically started based on the thermal resistance of the double-pipe heat exchanger, so that dirt can be removed when the dirt is slightly deposited on the inner wall of the water pipe, and further a large amount of dirt is prevented from being deposited on the inner wall of the water pipe.
According to the water heater, by applying the method for cleaning the water pipe of the double-pipe heat exchanger of the water heater, the inner wall of the water pipe of the double-pipe heat exchanger cannot deposit a large amount of dirt.
Drawings
FIG. 1 is a flow chart of a method for cleaning a water pipe of a double-pipe heat exchanger of a water heater according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a double pipe heat exchanger and a reversing device used in the method for cleaning the water pipe of the double pipe heat exchanger of the water heater of FIG. 1;
fig. 3 is a partial structural view of the double pipe heat exchanger of fig. 2, in which collision balls are included.
In the figure:
1: a double pipe heat exchanger; 2: a water pipe; 3: a reversing device; 4: a first water supply pipe; 5: a first downcomer pipe; 6: a second water supply pipe; 7: a second downcomer; 8: a first water supply valve; 9: a first drain valve; 10: a second water supply valve; 11: a second drain valve; 12: a main water supply pipe; 13: a main sewer pipe; 14: a water pump; 15: and a collision ball 15.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
Referring to fig. 1 to 3, in this embodiment, a method for cleaning a water pipe of a water heater sleeve heat exchanger is provided, which specifically includes: and when the thermal resistance of the double-pipe heat exchanger 1 is greater than a preset value, cleaning the water pipe 2 of the double-pipe heat exchanger 1 of the water heater. Wherein the preset value corresponds to a thermal resistance value of the dirt deposited slightly on the inner wall of the water pipe 2, that is, a thermal resistance value when the dirt on the inner wall of the water pipe 2 is not agglomerated. The mode of cleaning the water pipe 2 of the double-pipe heat exchanger 1 of the water heater adopts the self-cleaning mode of the water heater.
Therefore, the operation of cleaning the water pipe 2 can be automatically and periodically started based on the thermal resistance of the double-pipe heat exchanger 1, so that dirt can be removed when the dirt is slightly deposited on the inner wall of the water pipe 2, and further a large amount of dirt is prevented from being deposited on the inner wall of the water pipe 2.
Further, referring to fig. 1, in this embodiment, the method for cleaning the water pipe of the double-pipe heat exchanger of the water heater includes the following steps:
and S1, reading various parameters after the unit is started and operates for a preset time (for example, 30min), and calculating the thermal resistance of the double-pipe heat exchanger 1. The thermal resistance of the double-pipe heat exchanger 1 under the stable working condition can be obtained by taking the preset time as a node.
And S2, judging whether the thermal resistance of the double-pipe heat exchanger 1 is larger than a preset value, if so, executing a step S3, and if not, ending the cleaning program.
S3, judging whether the water temperature of the water tank reaches a preset temperature (the preset temperature is the expected water temperature input by a user), if so, executing a step S4, and if not, heating the water temperature of the water tank to the preset temperature;
and S4, judging whether the user uses water, if so, returning to the step S3, and if not, cleaning the water pipe 2 of the double-pipe heat exchanger 1 of the water heater.
Through the judgment of the step S3 and the step S4, the water use and water temperature requirements of the user can be met preferentially.
In this embodiment, in step S4, the presence or absence of water usage by the user is determined by the fluctuation of the water temperature in the water tank, specifically, the following sub-steps are performed:
s4.1, detecting the water temperature fluctuation condition in a water tank of the water heater;
s4.2, judging whether the user uses water or not according to the water temperature fluctuation condition, if so, returning to the step S3, and if not, executing the step S4.3;
and S4.3, cleaning a water pipe 2 of the double-pipe heat exchanger 1 of the water heater.
Of course, the invention is not limited to this, and in other embodiments, other ways to determine whether the user is using water may be used, for example, a sensor may be disposed on the water outlet pipe to detect whether water is flowing out of the water outlet pipe.
Further, in this embodiment, referring to fig. 2 and 3, in the step (step S4.3) of cleaning the water pipe 2 of the double pipe heat exchanger 1 of the water heater, the collision ball 15 is entrained by the water flow and flows in the water pipe 2, and the collision ball 15 continuously rubs against the inner wall of the water pipe 2 during the flowing process of the water flow, so that the dirt becomes loose and falls off, and is removed with the water flow, thereby removing the dirt on the inner wall. In this embodiment, the collision ball 15 is a resilient ball, which does not damage the inner wall of the water pipe 2, and on the other hand, the collision ball rapidly rebounds through its contact wall to increase the number of times of wall collision, thereby increasing the cleaning efficiency. Preferably, a screen is provided at both ends of the water tube 2 of the double pipe heat exchanger to confine the collision ball 15 in the water tube 2 of the double pipe heat exchanger, and the collision ball 15 remains in the water tube during non-cleaning, and then collides with the wall of the water tube to remove dirt.
Of course, the invention is not limited to this, and other automatic cleaning methods of the water heater can be adopted for cleaning, such as a chemical cleaning method.
Further, in the present embodiment, the reversing device 3 is used to control the water flow to alternately flow in the first direction and the second direction. The reversing device 3 comprises a first upper water pipe 4 and a first lower water pipe 5 which are communicated with one end of the casing water pipe 2, a second upper water pipe 6 and a second lower water pipe 7 which are communicated with the other end of the casing water pipe 2, and a first upper water valve 8, a first lower water valve 9, a second upper water valve 10 and a second lower water valve 11 which are respectively arranged on the first upper water pipe 4, the first lower water pipe 5, the second upper water pipe 6 and the second lower water pipe 7. When the first water feeding valve 8 is opened, the first water feeding pipe 4 is conducted, and when the first water feeding valve 8 is closed, the first water feeding pipe 4 is disconnected; when the second water feeding valve 10 is opened, the second water feeding pipe 6 is conducted, and when the second water feeding valve 10 is closed, the second water feeding pipe 6 is disconnected; when the first drain valve 9 is opened, the first drain pipe 5 is conducted, and when the first drain valve 9 is closed, the first drain pipe 5 is disconnected; when the second sewer valve 11 is opened, the second sewer pipe 7 is conducted, and when the second sewer valve 11 is closed, the second sewer pipe 7 is disconnected. The first and second water supply pipes 4 and 6 are connected to a main water supply pipe 12, and a water pump 14 is provided on the main water supply pipe 12. The first water supply valve 8, the first water drain valve 9, the second water supply valve 10 and the second water drain valve 11 are preferably solenoid valves.
Specifically, the step of cleaning the water pipe 2 of the double pipe heat exchanger 1 of the water heater (step S4.3) comprises the following substeps:
step a, keeping a first water feeding valve 8 and a second water discharging valve 11 open and keeping a second water feeding valve 10 and a first water discharging valve 9 closed at the same time, starting a water pump 14 and keeping the water pump running for a first preset flow time, and thus controlling water flow carrying a collision ball 15 to flow in a water pipe 2 for the first preset flow time (preferably, the first preset flow time is 3min) along a first direction, specifically, the water flow flows from a main water feeding pipe 14 to a main water discharging pipe 13 through a first water feeding pipe 4, a water pipe 2 of a double-pipe heat exchanger and a second water discharging pipe 7;
b, turning off the water pump 14 and keeping the water pump 14 to stop running for a first preset stop time, thereby controlling the water flow to stop flowing for the first preset stop time (preferably, the first preset stop time is 2 min);
c, keeping the second water feeding valve 10 and the first water discharging valve 9 open and keeping the first water feeding valve 8 and the second water discharging valve 11 closed at the same time, starting the water pump 14 and keeping the water pump running for a second preset flow time, so as to control the water flow to flow in the water pipe 2 for the second preset flow time (preferably, the second preset flow time is equal to the first preset flow time and is 3min) along the second direction, specifically, the water flow flows from the main water feeding pipe 12 to the main water discharging pipe 13 through the second water feeding pipe 6, the water pipe 2 of the double-pipe heat exchanger 1 and the first water discharging pipe 5;
d, turning off the water pump 14 and keeping the water pump 14 to stop running for a second preset stop time, so as to control the water flow to stop flowing for the second preset stop time (preferably, the second preset stop time is equal to the first preset stop time and is 2 min);
and e, returning to the step a until the preset times (preferably 3 times) are returned, namely, until the steps a to d are executed for the preset times, and then entering a standby state.
Of course, the present invention is not limited to this, and the steps S3 and S4 may be eliminated, and in step S2, it is determined whether the thermal resistance of the double pipe heat exchanger 1 is greater than the preset value, if yes, the water pipe 2 of the double pipe heat exchanger 1 of the water heater is cleaned, and if no, the cleaning procedure is ended.
Example two
In the present embodiment, a water heater is provided, which is the water heater heat exchanger tube cleaning method according to the first application example, and the inner wall of the water tube 2 of the heat exchanger tube 1 will not deposit a large amount of dirt.
Specifically, referring to fig. 1 to 3, the water heater of the present embodiment includes a control module, the double pipe heat exchanger 1, the reversing device 3, a main water supply pipe 12 and a main water drain pipe 13, wherein an impact ball 15 is disposed in the water pipe 2 of the double pipe heat exchanger 1, and a filter screen is disposed at both ends of the water pipe 2 to limit the impact ball 15 in the water pipe 2. And the control module controls the water heater to clean the water pipe 2 of the double-pipe heat exchanger 1 of the water heater when the thermal resistance of the double-pipe heat exchanger 1 is greater than a preset value. Wherein the preset value corresponds to a thermal resistance value of the dirt deposited slightly on the inner wall of the water pipe 2, that is, a thermal resistance value when the dirt on the inner wall of the water pipe 2 is not agglomerated. The mode of cleaning the water pipe 2 of the double-pipe heat exchanger 1 of the water heater adopts the self-cleaning mode of the water heater.
More specifically, the water heater of the present embodiment performs the following cleaning steps:
and S1, after the unit is started and operates for a preset time (for example, 30min), the control module reads various parameters and calculates the thermal resistance of the double-pipe heat exchanger 1. The thermal resistance of the double-pipe heat exchanger 1 under the stable working condition can be obtained by taking the preset time as a node.
And S2, the control module compares the calculated thermal resistance with a preset value, and judges whether the thermal resistance of the double-pipe heat exchanger 1 is larger than the preset value, if so, the step S3 is executed, and if not, the cleaning program is ended.
S3, the control module judges whether the water temperature of the water tank reaches a preset temperature (the preset temperature is the expected water temperature input by the user), if so, the step S4 is executed, and if not, the water temperature of the water tank is heated to the preset temperature;
s4.1, controlling related components to detect the water temperature fluctuation condition in a water tank of the water heater by a control module;
s4.2, the control module judges whether the user uses water according to the water temperature fluctuation condition, if so, the step S3 is returned, and if not, the step S4.3 is executed (the step S4.3 comprises the following steps a to e);
step a, a control module controls a first water feeding valve 8 and a second water discharging valve 11 to be opened and simultaneously controls a second water feeding valve 10 and a first water discharging valve 9 to be closed, and the control module starts a water pump 14 and keeps the water pump to operate for a first preset flow time, so that water flow carrying a collision ball 15 is controlled to flow in a water pipe 2 for the first preset flow time (preferably, the first preset flow time is 3min) along a first direction, and specifically, the water flow flows from a main water feeding pipe 12 to a main water discharging pipe 13 through a first water feeding pipe 4, a water pipe 2 of a double-pipe heat exchanger and a second water discharging pipe 7;
b, the control module controls the water pump 14 to be closed and controls the water pump 14 to keep stopping running for a first preset stop time, so that the water flow is controlled to stop flowing for the first preset stop time (preferably, the first preset stop time is 2 min);
c, the control module controls the second water feeding valve 10 and the first water discharging valve 9 to be opened and simultaneously controls the first water feeding valve 8 and the second water discharging valve 11 to be closed, and controls the water pump 14 to be started and keep running for a second preset flow time, so that water flow is controlled to flow in the water pipe 2 for a second preset flow time (preferably, the second preset flow time is equal to the first preset flow time and is 3min) along a second direction, and specifically, the water flow flows to the main water discharging pipe 13 from the main water feeding pipe 12 through the second water feeding pipe 6, the water pipe 2 of the double-pipe heat exchanger 1 and the first water discharging pipe 5;
d, the control module controls the water pump 14 to be closed and keeps the water pump 14 to stop running for a second preset stop time, so that the water flow is controlled to stop flowing for a second preset stop time (preferably, the second preset stop time is equal to the first preset stop time and is 2 min);
and e, returning to the step a until the preset times (preferably 3 times) are returned, namely, until the steps a to d are executed for the preset times, and then entering a standby state.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. A method for cleaning a water pipe of a water heater double-pipe heat exchanger is characterized by comprising the following steps:
when the thermal resistance of the double-pipe heat exchanger is larger than a preset value, cleaning a water pipe of the double-pipe heat exchanger of the water heater;
the method comprises the following steps of cleaning a water pipe of a double-pipe heat exchanger of the water heater: enabling water flow to carry the collision ball to flow in the water pipe, and enabling the collision ball to continuously rub the inner wall of the water pipe in the flowing process of the water flow to remove dirt on the inner wall;
the step of cleaning the water pipe of the double pipe heat exchanger of the water heater comprises the following substeps:
step a, controlling water flow carrying collision balls to flow in a water pipe along a first direction for a first preset flow time;
b, controlling the water flow to stop flowing for a first preset stop time;
c, controlling the water flow to flow in the water pipe along a second direction for a second preset flow time;
step d, controlling the water flow to stop flowing for a second preset stop time;
and e, returning to the step a until the preset times are returned.
2. The method for cleaning the water pipe of the heat exchanger of the water heater sleeve pipe as recited in claim 1, which comprises the following steps:
s1, calculating the thermal resistance of the double-pipe heat exchanger after the unit is started to operate for a preset time;
and S2, judging whether the thermal resistance of the double-pipe heat exchanger is larger than a preset value, if so, cleaning a water pipe of the double-pipe heat exchanger of the water heater, and if not, ending the cleaning procedure.
3. The method for cleaning a water pipe of a double pipe heat exchanger of a water heater according to claim 1,
s1, calculating the thermal resistance of the double-pipe heat exchanger after the unit is started to operate for a preset time;
s2, judging whether the thermal resistance of the double-pipe heat exchanger is larger than a preset value or not, if so, executing a step S3, and if not, ending the cleaning program;
s3, judging whether the water temperature of the water tank reaches the preset temperature, if so, executing a step S4, and if not, heating the water temperature of the water tank to the preset temperature;
and S4, judging whether the user uses water, if so, returning to the step S3, and if not, cleaning a water pipe of the double-pipe heat exchanger of the water heater.
4. The method for cleaning a water pipe of a double pipe heat exchanger of a water heater according to claim 3,
the step S4 includes the following sub-steps:
s4.1, detecting the water temperature fluctuation condition in a water tank of the water heater;
s4.2, judging whether the user uses water or not according to the water temperature fluctuation condition, if so, returning to the step S3, and if not, executing the step S4.3;
and S4.3, cleaning a water pipe of the sleeve pipe heat exchanger of the water heater.
5. The method for cleaning a water pipe of a double pipe heat exchanger of a water heater according to claim 1,
the collision ball is an elastic ball.
6. The method for cleaning a water pipe of a double pipe heat exchanger of a water heater according to claim 1,
controlling the water flow to alternately flow along the first direction and the second direction by adopting a reversing device;
the reversing device comprises a first water feeding pipe and a first water discharging pipe which are communicated with one end of the sleeve water pipe, a second water feeding pipe and a second water discharging pipe which are communicated with the other end of the sleeve water pipe, and a first water feeding valve, a first water discharging valve, a second water feeding valve and a second water discharging valve which are respectively arranged on the first water feeding pipe, the first water discharging pipe, the second water feeding pipe and the second water discharging pipe.
7. The method of cleaning a water pipe of a water heater double pipe heat exchanger according to claim 6,
the first water feeding pipe and the second water feeding pipe are connected to a main water feeding pipe, and a water pump is arranged on the main water feeding pipe;
in step a: keeping the first water feeding valve and the second water discharging valve open and keeping the second water feeding valve and the first water discharging valve closed at the same time, and starting the water pump and keeping the water pump running for the first preset flow time;
in step b: turning off the water pump and keeping the water pump to stop running for the first preset stop time;
in step c: keeping the second water feeding valve and the first water discharging valve open and keeping the first water feeding valve and the second water discharging valve closed at the same time, and starting the water pump and keeping the water pump running for the second preset flow time;
in step d: and turning off the water pump and keeping the water pump to stop running for the second preset stop time.
8. A water heater, characterized in that the water heater is the water heater applying the cleaning method of the water pipe of the pipe heat exchanger of the water heater as claimed in any one of claims 1 to 7.
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| 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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| 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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| CN107781993B true CN107781993B (en) | 2020-05-26 |
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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 Smart Home 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. |