Cleaning device and water heater

Abstract

The embodiment of the utility model provides a cleaning device and a water heater, the cleaning device comprises a second pipeline connected between a water inlet and a water outlet, the second pipeline and a first pipeline form a circulation loop, and the second pipeline is provided with a water source access port connected with an external water source; the cleaning assembly is arranged on the second pipeline, a containing cavity used for storing a cleaning agent is formed in the cleaning assembly, and the containing cavity communicates with the second pipeline; and the water pump is arranged on the first pipeline and / or the second pipeline, and the water pump is used for cleaning the circulation loop through the cleaning agent in the cleaning assembly after being started. According to the embodiment, the cleaning agent in the cleaning assembly circulates in the first pipeline and the second pipeline in a circulating mode through the water pump so as to remove dirt and other impurities in a circulating loop, the descaling device is simple in structure, and the cleaning effect of the water heater pipeline is improved by adding the cleaning agent and conducting descaling in a circulating mode.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and particularly relates to a cleaning device and a water heater. Background Art

[0002] In daily life, water heaters are usually used to provide hot water to meet daily needs. However, as the service life of the water heater increases, dirt or other impurities are likely to be generated in the pipeline of the water heater. Especially when the water temperature is high, dirt is more likely to be generated, and the higher the water temperature, the faster the dirt generation speed. This means that after long-term use of the water heater, a large amount of dirt will accumulate inside the pipeline, resulting in poor heating effect of the water heater, and even corrosion of the pipeline, leading to water leakage problems. In addition, for the existing pipeline descaling solutions of water heaters, the descaling device has a complex structure and poor descaling effect. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a cleaning device and a water heater, aiming to solve the problems of complex structure and poor effect of the existing descaling device of the water heater.

[0004] An embodiment of the utility model provides a cleaning device, which is applied to a water heater. The water heater includes a water inlet, a water outlet, and a first pipeline connected between the water inlet and the water outlet. The cleaning device includes:

[0005] A second pipeline, which is connected between the water inlet and the water outlet. The second pipeline and the first pipeline form a circulation loop, and the second pipeline is provided with a water source connection port connected to an external water source;

[0006] A cleaning component, which is arranged on the second pipeline. A containing cavity for storing a cleaning agent is arranged inside the cleaning component, and the containing cavity is communicated with the second pipeline;

[0007] A water pump, which is arranged on the first pipeline and / or the second pipeline. The water pump is used to clean the circulation loop with the cleaning agent in the cleaning component after being started.

[0008] Specifically, the cleaning device further includes a switching component arranged on the second pipeline. The switching component is used to switch the water in the circulation loop to the water using end or keep it in the circulation loop.

[0009] Specifically, the second pipeline includes a first connection end and a second connection end. The first connection end is closer to the water outlet than the second connection end. The switching component includes a fixed end, a first switching end, and a second switching end. The fixed end is connected to the first connection end, the first switching end is connected to the second connection end, the second switching end is connected to the water using end, and a regulating valve for switching between the first switching end and the second switching end is arranged in the switching component.

[0010] Specifically, a filter element is provided in the cleaning assembly for filtering dirt in the circulation loop.

[0011] Specifically, the second pipeline further includes a third connection end. The cleaning assembly includes a main body and an end cap. The end cap covers the main body. The accommodation cavity is provided in the main body. The end cap is provided with a first interface and a second interface. The first interface is connected to the water inlet, the second interface is connected to the third connection end, and one end of the filter element is connected to the end cap and is located between the first interface and the second interface.

[0012] Specifically, the main body and the end cap are detachably connected.

[0013] Specifically, one end of the filter element surrounds the first interface, and the other end of the filter element extends into the accommodation cavity.

[0014] Specifically, the cleaning device further includes a water quality detector for detecting the water quality in the first pipeline and / or the second pipeline.

[0015] Specifically, the cleaning device further includes a temperature detector for detecting the water temperature in the first pipeline and / or the second pipeline.

[0016] An embodiment of the present invention further provides a water heater, including a water inlet, a water outlet, and a first pipeline connected between the water inlet and the water outlet, and further including the cleaning device as described above.

[0017] An embodiment of the present invention provides a cleaning device and a water heater. The cleaning agent in the cleaning assembly is circulated back and forth in the first pipeline and the second pipeline by a water pump to remove dirt and other impurities in the circulation loop. This descaling device has a simple structure, and the cleaning effect of the water heater pipeline is improved by adding a cleaning agent and the circulation descaling method. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is an internal structure diagram of a water heater provided by an embodiment of the present invention;

[0020] Figure 2 It is an external structure diagram of a water heater provided by an embodiment of the present invention;

[0021] Figure 3 Another external structure diagram of a water heater provided by an embodiment of the present utility model;

[0022] Figure 4 A sectional view of the cleaning assembly;

[0023] Figure 5 A structure diagram of the cleaning assembly;

[0024] Figure 6 A structure diagram of a cleaning device provided by an embodiment of the present utility model;

[0025] Figure 7 Another structure diagram of a cleaning device provided by an embodiment of the present utility model.

[0026] Explanation of the markings in the figure:

[0027] 1. Cleaning device; 11. Second pipeline; 111. First connection end; 112. Second connection end; 113. Third connection end; 115. Water outlet pipe; 116. Water inlet pipe; 12. Cleaning assembly; 121. Accommodation cavity; 122. Filter element; 123. Body; 124. End cover; 125. First interface; 126. Second interface; 13. Water pump; 14. Switching assembly; 141. Fixed end; 142. First switching end; 143. Second switching end;

[0028] 2. Water heater; 21. Water inlet; 22. Water outlet; 23. First pipeline;

[0029] 3. Water source connection port;

[0030] 4. Water usage end;

[0031] 5. Regulating valve;

[0032] 6. Water quality detector;

[0033] 7. Temperature detector. Specific implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups.

[0036] It should also be understood that the terms used in the specification of the present utility model are merely for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in the specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0037] It should be further understood that the term "and / or" used in the specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0038] Please refer to Figures 1-4 , an embodiment of the present utility model provides a cleaning device 1, which is applied to a water heater 2. The water heater 2 includes a water inlet 21, a water outlet 22, and a first pipeline 23 connected between the water inlet 21 and the water outlet 22. The cleaning device 1 includes:

[0039] A second pipeline 11, which is connected between the water inlet 21 and the water outlet 22. The second pipeline 11 and the first pipeline 23 form a circulation loop, and the second pipeline 11 is provided with a water source access port 3 connected to an external water source;

[0040] A cleaning component 12, which is arranged on the second pipeline 11. A receiving cavity 121 for storing a cleaning agent is arranged in the cleaning component 12, and the receiving cavity 121 is communicated with the second pipeline 11;

[0041] A water pump 13, which is arranged on the first pipeline 23 and / or the second pipeline 11. The water pump 13 is used to clean the circulation loop with the cleaning agent in the cleaning component 12 after being turned on.

[0042] In this embodiment, the first pipeline 23 is arranged inside the water heater, and the second pipeline 11 is arranged outside the water heater. The circulation process of the entire circulation loop is as follows: Open the external water source, and the external water source flows into the second pipeline 11 through the water source access port 3 and closes the external water source after a period of time (it can be after the accommodation cavity 121 is filled with water). The water in the second pipeline 11 flows into the accommodation cavity 121 of the cleaning assembly 12, and the cleaning agent in the accommodation cavity 121 is mixed with the water. At the same time, the water pump 13 is turned on, and the water pump 13 pumps the water mixed with the cleaning agent into the interior of the water heater through the water inlet 21, flows through the first pipeline 23 and cleans the interior of the first pipeline 23, then flows out through the water outlet 22 and enters the second pipeline 11 to clean the interior of the second pipeline 11. After the first pipeline 23 and the second pipeline 11 are cleaned for the first time, under the action of the water pump 13, the water flows into the accommodation cavity 121 of the cleaning assembly 12 again and then into the interior of the water heater, repeating the cycle until the cleaning is completed. In this embodiment, the water pump 13 circulates the cleaning agent in the cleaning assembly 12 back and forth in the first pipeline 23 and the second pipeline 11 to remove dirt and other impurities in the pipeline. The descaling device in this embodiment has a simple structure, and also improves the overall cleaning effect of the water heater pipeline by adding a cleaning agent and the cycle descaling method.

[0043] During specific implementation, regular cleaning can be carried out to reduce dirt accumulation, thereby improving the heating efficiency of the water heater and prolonging the service life of the water heater. The reduction of dirt can effectively avoid damage to the water heater equipment and help maintain the best operating state of the water heater.

[0044] Specifically, as Figures 1-2 shown, the cleaning device 1 further includes a switching assembly 14 arranged on the second pipeline 11, and the switching assembly 14 is used to switch the water in the circulation loop to the water using end 4 or keep it in the circulation loop.

[0045] In this embodiment, the water heater includes three modes, namely a cleaning mode, a drainage mode, and a water using mode. The switching assembly 14 can switch the usage mode according to user needs. Specifically, when the cleaning mode is turned on, the switching assembly 14 keeps the water in the circulation loop to clean the pipeline and can ensure that the cleaning agent circulates fully in the circulation loop, so as to more thoroughly remove dirt and impurities and improve the cleaning effect; when the drainage mode is turned on, the switching assembly 14 switches the water in the circulation loop to the water using end 4 to discharge the cleaned wastewater. When the water using mode is turned on, the switching assembly 14 also switches the water in the circulation loop to the water using end 4 for users to use. The drainage mode is usually used in combination with the cleaning mode, that is, the drainage mode needs to be turned on after the cleaning mode is completed. Otherwise, when the user turns on the water using mode, the water flowing out is wastewater, while the water using mode is used alone, that is, it can be used at any time.

[0046] The water usage end 4 in this embodiment is mainly used to open the water usage end 4 to drain the cleaned wastewater after the cleaning mode is completed, and close the water usage end 4 until the wastewater is completely drained. Moreover, during the cleaning process, the water in the circulation loop remains in the circulation loop to ensure that the cleaning agent cannot enter the water usage end 4, preventing the cleaning agent from polluting or affecting the user's water usage.

[0047] Specifically, as Figure 1 and Figures 6-7 shown, the second pipeline 11 includes a first connection end 111 and a second connection end 112. The first connection end 111 is closer to the water outlet 22 than the second connection end 112. The switching component 14 includes a fixed end 141, a first switching end 142, and a second switching end 143. The fixed end 141 is connected to the first connection end 111, the first switching end 142 is connected to the second connection end 112, and the second switching end 143 is connected to the water usage end 4. A regulating valve 5 for switching between the first switching end 142 and the second switching end 143 is provided in the switching component 14.

[0048] In this embodiment, the second pipeline 11 includes a water outlet pipe 115 and a water inlet pipe 116. One end of the water outlet pipe 115 is connected to the water outlet 22, and the other end of the water outlet pipe 115 (i.e., the first connection end 111) is connected to the fixed end 141 of the switching component 14. One end of the water inlet pipe 116 (i.e., the second connection end 112) is connected to the first switching end 142 of the switching component 14, and the other end of the water inlet pipe 116 (i.e., the third connection end 113 in the subsequent embodiment) is connected to the second interface 126 of the cleaning component 12. The water usage end 4 is connected to the second switching end 143 of the switching component 14. The regulating valve 5 can switch between the first switching end 142 and the second switching end 143 to adjust the water flow direction, thereby achieving different usage requirements. In specific implementation, a water source access port 3 is provided on the water inlet pipe 116. The external water source enters the water inlet pipe 116 through the water source access port 3, and then enters the first pipeline 23 through the water inlet 21. The water heater heats the water in the first pipeline 23. When using the water usage end 4, it is switched to the second switching end 143 through the regulating valve 5, enabling the user to use the heated water. When the cleaning mode is turned on, the external water source is still introduced into the water inlet pipe 116, so that the tap water flows into the accommodation cavity 121 of the cleaning component 12 and mixes with the cleaning agent. The water mixed with the cleaning agent enters the first pipeline 23 through the water inlet 21 for cleaning, and then flows into the water outlet pipe 115 through the water outlet 22 for cleaning. At this time, it is switched to the first switching end 142 through the regulating valve 5, so that the water mixed with the cleaning agent flows into the water inlet pipe 116 for cleaning, thereby filtering the dirt after the previous round of cleaning through the filter element 122, and then performing circular cleaning in the circulation loop again. By setting the switching component in this embodiment, the user can conveniently switch to the required port through the regulating valve 5, thereby improving the convenience and comfort of using the water heater.

[0049] Specifically, as Figure 4 shown, a filter element 122 is provided in the cleaning assembly 12 for filtering dirt in the circulation loop.

[0050] In this embodiment, since the water mixed with the cleaning agent circulates in the first pipeline 23 and the second pipeline 11, after one round of circulation, under the action of the cleaning agent, the water is mixed with dirt or other impurities. If these dirt enter the water heater again with the water, the cleaning agent needs to clean these dirt again, which easily causes the cleaning agent to be unable to completely clean the pipeline after the previous round of cleaning, resulting in poor cleaning effect. Therefore, before the water mixed with dirt enters the water heater, the dirt needs to be separated so that it cannot flow into the water heater. Therefore, it is preferably to set a filter element 122 in the cleaning assembly 12. The dirt in the circulation loop is filtered by the filter element 122 and remains in the cleaning assembly 12. The water separated from the dirt flows out of the accommodation cavity 121 and then flows into the first pipeline 23 through the water inlet 21 to start a new round of cleaning. By setting the filter element 122 in this embodiment, the accumulation of dirt in the pipeline can be effectively prevented, thereby improving the cleaning effect of the circulation loop. Among them, the filter element 122 is a filter mesh.

[0051] Specifically, as Figure 1 and Figures 6-7 shown, the second pipeline 11 further includes a third connection end 113. The cleaning assembly 12 includes a main body 123 and an end cover 124. The end cover 124 is covered on the main body 123. The accommodation cavity 121 is arranged in the main body 123. The end cover 124 is provided with a first interface 125 and a second interface 126. The first interface 125 is connected to the water inlet 21, and the second interface 126 is connected to the third connection end 113. One end of the filter element 122 is connected to the end cover 124 and is located between the first interface 125 and the second interface 126.

[0052] In this embodiment, a filter element 122 is connected to the position of the end cap 124 corresponding to the first interface 125, and the end cap 124 and the filter element 122 are covered on the body 123. At this time, the entire filter element 122 is located between the first interface 125 and the second interface 126, and the cleaning assembly 12 is assembled. Then, the cleaning assembly 12 is installed on the water inlet 21 through the first interface 125 of the end cap 124, and installed on the third connection end 113 of the second pipeline 11 through the second interface 126 of the end cap 124, thereby completing the installation of the entire cleaning assembly 12. Since water will flow into the accommodation cavity 121 from the second interface 126 and flow out of the accommodation cavity 121 from the first interface 125, and the entire filter element 122 is located between the first interface 125 and the second interface 126, that is, the filter element 122 is arranged at the necessary place of the water path, so as to realize the filtration of the inflowing water, so that the dirt after cleaning cannot enter the inside of the water heater. In specific implementation, the body 123 can be a columnar structure, and an extension part is arranged on the columnar structure, and the end cap 124 is connected through the extension part. The accommodation cavity 121 is a hollow area inside the columnar structure. If the extension part is not provided, the end cap 124 will extend into the accommodation cavity 121 to be connected to the body 123. At this time, the space of the accommodation cavity 121 is reduced, the storage capacity of the cleaning agent is reduced, and the cleaning effect is further reduced. Therefore, it is preferable to arrange an extension part on the body 123, arrange an external thread on the outer periphery of the extension part, and arrange an internal thread inside the first interface 125. By connecting the external thread and the internal thread, the end cap 124 and the body 123 are firmly connected and are also convenient for disassembly. The detachable setting of the end cap 124 and the body 123 enables the cleaning assembly 12 to be conveniently maintained and replaced, improving the overall cleaning effect of the water heater pipeline.

[0053] Specifically, as Figures 4-5 shown, the body 123 and the end cap 124 are detachably connected.

[0054] In this embodiment, the cleaning agent is stored in the accommodating cavity 121 of the main body 123. When the cleaning mode is turned on, tap water enters the second pipeline 11 from the water source access port 3 and enters the accommodating cavity 121 to be mixed with the cleaning agent. The mixed water will circulate into the pipeline for cleaning. That is, when the cleaning mode is turned on, most of all the cleaning agent in the accommodating cavity 121 will be mixed with water, so that the cleaning agent can only be used once. When the cleaning mode is turned on next time, it is necessary to add the cleaning agent into the accommodating cavity 121 in advance. Therefore, the main body 123 and the end cover 124 are set to be detachably connected. Before each cleaning, the main body 123 can be disassembled, and an appropriate amount of cleaning agent can be loaded into the accommodating cavity 121. At this time, the water source access port 3 is kept closed, then the main body 123 is installed back on the end cover 124, and then the water source access port 3 is opened to allow tap water to flow into the accommodating cavity 121 for cleaning. After the cleaning is completed, since there is dirt on the accommodating cavity 121 and the filter element 122, the main body 123 still needs to be disassembled at this time to clean the accommodating cavity 121, and then the main body 123 is installed after the cleaning is completed. By setting the main body 123 and the end cover 124 to be detachably connected in this embodiment, the disassembly of the main body 123 and the end cover 124 becomes simple, which is convenient for loading the cleaning agent into the main body 123 before cleaning and cleaning the accommodating cavity 121 after cleaning, so that the cleaning mode can be turned on again without being affected by the previous cleaning, improving the cleaning effect. In specific implementation, the cleaning assembly 12 and the second pipeline 11 as well as the cleaning assembly 12 and the water inlet 21 are all detachably arranged. This detachable arrangement can be a threaded connection, which is convenient for disassembling the cleaning assembly 12 to maintain and replace the components of the cleaning assembly 12.

[0055] Specifically, as Figures 4-5 shown, one end of the filter element 122 is surrounded by the first interface 125, and the other end of the filter element 122 extends into the accommodating cavity 121.

[0056] When in the cleaning mode and starting a new round of cleaning, the water mixed with dirt flows into the accommodation chamber 121 through the second interface 126, and after being filtered by the filter element 122, it flows into the water inlet 21 through the first interface 125. One end of the filter element 122 in this embodiment is surrounded by the first interface 125, and the other end extends into the accommodation chamber 121, which can ensure that the water mixed with dirt is fully filtered after passing through the filter element 122. Moreover, one end of the filter element 122 is fixed to the first interface 125 of the end cap 124, ensuring that when the water mixed with dirt can only pass through the filter element 122 and then flow out from the first interface 125, the sewage can be fully filtered. Also, the filter element 122 and the end cap 124 are detachably arranged. After cleaning, the filter element 122 is disassembled for rinsing and then reinstalled on the first interface 125. In this embodiment, by setting the other end of the filter element 122 to extend deep into the accommodation chamber 121, the filtering area of the filter element 122 is increased, improving the filtering effect of dirt, and the dirt remains in the accommodation chamber 121 and cannot enter the first pipeline 23, and the water mixed with the cleaning agent undergoes a new round of cleaning, thereby improving the cleaning effect.

[0057] Specifically, as Figure 1 shown, the cleaning device 1 further includes a water quality detector 6 for detecting the water quality in the first pipeline 23 and / or the second pipeline 11.

[0058] In this embodiment, the water quality detector 6 can be installed in the first pipeline 23 and / or the second pipeline 11 to detect the water quality condition in the pipeline, and transmit the water quality condition to the user terminal in real time through the display screen of the water heater or a wireless device. The water heater calculates the cleaning time and cleaning cycle according to the water quality condition and notifies the user to clean on time. In specific implementation, when the water hardness is greater than 300 mg / L, it is cleaned once every first cycle; when the water hardness is 200 - 300 mg / L, it is cleaned once every second cycle; when the water hardness is less than 200 mg / L, it is cleaned once every third cycle. Among them, the first cycle can be 3 months, the second cycle can be half a year, and the third cycle can be one year. In this embodiment, the water quality detector 6 can be installed in the first pipeline 23 to detect the water quality in the first pipeline 23, or installed in the water outlet pipe 115. These two sections are the water paths that need to be passed through in all three modes, which can improve the accuracy of detection.

[0059] Specifically, as Figure 1 shown, the cleaning device 1 further includes a temperature detector 7 for detecting the water temperature in the first pipeline 23 and / or the second pipeline 11.

[0060] The foregoing embodiments are mainly used to clean the generated dirt. This embodiment can also reduce the generation of dirt. Dirt is usually generated when the temperature is higher than 37 degrees, and the higher the water temperature, the faster the generation rate of dirt. The process of dirt formation is: the water heater heats up - dirt is formed - the dirt precipitates and solidifies in the pipeline. When the water heater is working normally, the water in the pipeline is flowing, and it is difficult for the dirt to precipitate and solidify. Therefore, the dirt precipitation mainly occurs after the water heater stops heating. At this time, although the water heater stops heating, the water temperature in the first pipeline 23 is still very high, the dirt formation speed is fast, and the dirt can precipitate in the first pipeline 23. In this embodiment, after the water heater stops heating, the water pump 13 is turned on, and the water in the circulation loop is circulated and cooled under the drive of the water pump 13. The water temperature of the current pipeline is detected by the temperature detector 7. When the water temperature is less than 37 degrees, the circulation is stopped. During the circulation process, the filter element 122 can filter the generated dirt, greatly reducing the formation of dirt in the pipeline, thereby reducing the number of times the user cleans the water heater. In specific implementation, the temperature detector 7 can be installed on the first pipeline 23 and / or the second pipeline 11. This embodiment is to detect the pipeline temperature after the water heater stops heating. When the water-using end 4 or the cleaning mode is not used, the heated water is mainly concentrated inside the water heater. Therefore, in this embodiment, the temperature detector 7 is installed inside the first pipeline 23 to detect the water temperature inside the first pipeline 23.

[0061] In specific implementation, the temperature detector 7 can also be used in cooperation with the water quality detector 6. After the water heater stops heating, first detect the water quality situation through the water quality detector 6. If the water quality is poor (such as the water hardness is greater than 100 mg / L), then turn on the water pump 13, and cool the pipeline under the action of the water pump 13. If the water quality is good, there is no need to cool the pipeline. It should be noted that a cleaning agent needs to be added when the cleaning mode is turned on for cleaning. This embodiment does not require adding a cleaning agent.

[0062] An embodiment of the present utility model also provides a water heater 2, including a water inlet 21, a water outlet 22, and a first pipeline 23 connected between the water inlet 21 and the water outlet 22, and further including the cleaning device 1 as described above.

[0063] In this embodiment, by arranging the cleaning device 1 outside the water heater 2, the dirt after the cleaning device 1 cleans the first pipeline 23 and the second pipeline 11 cannot enter the inside of the water heater, thus ensuring the cleanliness of the first pipeline 23, and further improving the overall performance and water quality of the water heater. Through the cleaning device 1, regular cleaning can be carried out, thereby preventing the accumulation of dirt and impurities, maintaining the heat exchange efficiency and smooth water flow of the water heater, and reducing energy consumption. In specific implementation, the cleaning device 1 is separately disassembled from the water heater and installed on other devices that need to clean dirt.

[0064] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A cleaning device is applied to a water heater. The water heater includes a water inlet, a water outlet, and a first pipeline connected between the water inlet and the water outlet. It is characterized in that, The cleaning device includes: A second pipeline, connected between the water inlet and the water outlet. The second pipeline and the first pipeline form a circulation loop, and the second pipeline is provided with a water source connection port connected to an external water source; A cleaning component, arranged on the second pipeline. A receiving cavity for storing a cleaning agent is arranged in the cleaning component, and the receiving cavity is communicated with the second pipeline; A water pump, arranged on the first pipeline and / or the second pipeline. The water pump is used to clean the circulation loop with the cleaning agent in the cleaning component after being turned on.

2. The cleaning device according to claim 1, characterized in that, It further includes a switching component arranged on the second pipeline. The switching component is used to switch the water in the circulation loop to the water using end or keep it in the circulation loop.

3. The cleaning device according to claim 2, wherein 4. The cleaning device according to claim 1, characterized in that The second pipeline includes a first connection end and a second connection end. The first connection end is closer to the water outlet than the second connection end. The switching component includes a fixed end, a first switching end and a second switching end. The fixed end is connected to the first connection end, the first switching end is connected to the second connection end, and the second switching end is connected to the water using end. A regulating valve for switching between the first switching end and the second switching end is arranged in the switching component.

5. The cleaning device according to claim 4, wherein, A filter element is arranged in the cleaning component for filtering dirt in the circulation loop.

6. The cleaning device according to claim 5, wherein The second pipeline further includes a third connection end. The cleaning component includes a main body and an end cover. The end cover covers the main body. The receiving cavity is arranged in the main body. A first interface and a second interface are arranged on the end cover. The first interface is connected to the water inlet, and the second interface is connected to the third connection end. One end of the filter element is connected to the end cover and is located between the first interface and the second interface.

7. The cleaning device according to claim 5, characterized in that, The main body and the end cover are detachably connected.

8. The cleaning device according to claim 1, characterized in that, One end of the filter element surrounds the first interface, and the other end of the filter element extends into the receiving cavity.

9. The cleaning device according to claim 1, wherein It further includes a water quality detector for detecting the water quality in the first pipeline and / or the second pipeline.

10. A water heater, comprising a water inlet, a water outlet, and a first pipeline connected between the water inlet and the water outlet, characterized in that, It further includes a temperature detector for detecting the water temperature in the first pipeline and / or the second pipeline. It further includes the cleaning device according to any one of claims 1-9.

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