Flowing water type electric water heater

Abstract

The utility model discloses a running water type electric water heater which comprises a liquid storage cavity, a circulating pipe, a water outlet pipe, a heat exchange module and a second heating module, a first heating module and a liquid heat storage medium are arranged in the liquid storage cavity, the circulating pipe is provided with a water outlet and a water inlet, the water outlet and the water inlet are both communicated with the liquid storage cavity, and a water pump is arranged on the circulating pipe. The circulating pipe and the water outlet pipe exchange heat through the heat exchange module, the second heating module is arranged on the circulating pipe and / or the water outlet pipe and / or the heat exchange module, the water pump assists circulation of the liquid heat storage medium in the circulating pipe and the liquid storage cavity, heat is transferred to the water outlet pipe through the heat exchange module, and therefore water in the water outlet pipe is heated. The liquid heat storage medium stored in the liquid storage cavity only circulates in the liquid storage cavity, and few impurities are generated. And when the water heater is used for a long time and the heat cannot meet the use requirement, the second heating module works, so that the heat is directly or indirectly transferred to running water flowing in the water outlet pipe, and heat supplementation for running water with insufficient temperature is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water heaters, in particular to a running water type electric water heater. Background Art

[0002] A water heater is a device that uses various physical principles to increase the temperature of cold water to hot water within a certain period of time. In a storage electric water heater, water is heated inside the electric heater, and the heated water is stored in the electric heater and is heated repeatedly. During the above heating process, more scale will be generated. If used for a long time, more new water will enter the electric water heater for heating, which will cause a lot of scale to accumulate, resulting in poor water quality and even blockage, affecting the normal use of the electric water heater.

[0003] In addition, the water temperature of an electric water heater will gradually decrease during long-term use, even to the point where it cannot meet normal usage needs. Utility Model Content

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a running water electric water heater, which can solve the problem that scale accumulation caused by long-term heating in the water heater affects the normal use of the electric water heater, and the heating water temperature gradually decreases during use, resulting in failure to meet the needs.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A running water type electric water heater, comprising:

[0007] A liquid storage chamber, wherein a first heating module and a liquid heat storage medium are arranged in the liquid storage chamber;

[0008] A circulation pipe, wherein the circulation pipe has a water outlet and a water inlet, the water outlet and the water inlet are both connected to the liquid storage chamber, and a water pump is provided on the circulation pipe;

[0009] Outlet pipe;

[0010] A heat exchange module, through which the circulation pipe and the water outlet pipe exchange heat;

[0011] A second heating module: the circulation pipe is provided with a second heating module, and / or the water outlet pipe is provided with a second heating module, and / or the heat exchange module is provided with a second heating module.

[0012] By adopting the above scheme, the first heating module is used to heat the liquid heat storage medium inside the liquid storage chamber. The liquid heat storage medium completes the circulation of the liquid heat storage medium in the circulation pipe and the liquid storage chamber through a water pump, and then transfers the heat to the water outlet pipe through the heat exchange module, thereby heating the water in the water outlet pipe. In this way, the heating process of the flowing water is completed, that is, the living water is heated, and the water flowing in the water outlet pipe is heated. The liquid heat storage medium stored in the liquid storage chamber only circulates in the liquid storage chamber, and the impurities generated are very few, and no more scale will be generated, so as not to affect the use of the electric water heater. In addition, when the water heater is used for a long time, when the heat cannot meet the use requirements, the second heating module works to heat the circulation pipe, and / or, the water outlet pipe, and / or, the heat exchange module, thereby directly or indirectly transferring the heat to the living water flowing in the water outlet pipe, completing the heat supplement of the living water with insufficient temperature, thereby ensuring the stability of the final water outlet temperature of the water outlet pipe.

[0013] Furthermore, the first heating module is electrically connected to a first temperature sensor.

[0014] By adopting the above solution, the first temperature sensor is provided to conveniently monitor the temperature of the liquid heat storage medium filled in the liquid storage cavity, so as to facilitate the control of the operation of the heating module.

[0015] Furthermore, the second heating module is electrically connected to a second temperature sensor, and the second temperature sensor has a temperature monitoring point, and the temperature monitoring point is arranged in the circulation pipe, the water outlet pipe or the heat exchange module.

[0016] By adopting the above solution, a second temperature sensor is set to monitor the temperature of the circulation pipe, the water outlet pipe or the heat exchange module, so as to adjust whether the second heating module starts heating, the size of the heating power and the heating time.

[0017] Furthermore, the circulation pipe includes a first water inlet section, a first heat exchange section and a first water outlet section, the first heat exchange section is a pipeline located at the heat exchange module, the first water inlet section is a pipe section between the water inlet and the first heat exchange section, the first water outlet section is a pipe section between the water outlet and the first heat exchange section, and the second heating module is arranged in the first water inlet section, the first heat exchange section or the first water outlet section.

[0018] By adopting the above solution, the second heating module can be installed on the first water inlet section, the first heat exchange section or the first water outlet section according to requirements.

[0019] Furthermore, the water outlet pipe includes a second water inlet section, a second heat exchange section and a second water outlet section, the second heat exchange section is a pipeline located at the heat exchange module, the section of the water outlet pipe located upstream of the second heat exchange section is the second water inlet section, the section of the water outlet pipe located downstream of the second heat exchange section is the second water outlet section, and the second heating module is arranged in the second water inlet section, the second heat exchange section or the second water outlet section.

[0020] By adopting the above solution, the second heating module can be installed on the second water inlet section, the second heat exchange section or the second water outlet section according to requirements.

[0021] Furthermore, the water outlet and the water inlet are at different heights in the liquid storage chamber.

[0022] By adopting the above solution, since the liquid heat storage medium in the circulation pipe will pass through the heat exchange module for heat exchange during the water circulation process, the temperature will decrease. By setting the height difference between the water outlet and the water inlet of the circulation pipe, it can be ensured that the liquid heat storage medium with reduced temperature will not be immediately pumped away by the water pump again to participate in the circulation, thereby affecting the heating quality of the live water.

[0023] Furthermore, the liquid storage chamber is connected with a liquid infusion tube.

[0024] By adopting the above scheme, the liquid heat storage medium in the liquid storage chamber will produce a certain loss during use. After the loss reaches a certain value, it is replenished through the liquid replenishing tube to ensure that the total amount of heat that can be stored by the liquid heat storage medium in the liquid storage chamber can meet the use requirements.

[0025] Furthermore, the water outlet pipe is provided with a branch pipe, and the branch pipe is a liquid infusion pipe, and the liquid infusion pipe connects the water outlet pipe with the liquid storage chamber.

[0026] By adopting the above solution, a branch pipe is provided at the water outlet pipe to serve as a liquid replenishing pipe to replenish the liquid in the liquid storage cavity, thereby saving design space and using water for replenishment.

[0027] Furthermore, the heat exchange module is a plate heat exchanger, a fin heat exchanger or a microchannel heat exchange structure.

[0028] By adopting the above solution, the plate heat exchanger, fin heat exchanger and microchannel heat exchange structure have high heat exchange efficiency and are suitable for rapid heat exchange scenarios during live water heating.

[0029] Furthermore, the liquid storage chamber is provided with a pressure relief valve.

[0030] By adopting the above solution, the pressure inside the liquid storage chamber can be easily adjusted, thereby improving safety.

[0031] In summary, the utility model provides a running water type electric water heater with the following technical effects:

[0032] 1. The liquid heat storage medium is heated in the liquid storage cavity, and the liquid heat storage medium is circulated in the circulation pipe and the liquid storage cavity by a water pump, and then the heat is transferred to the water outlet pipe by the heat exchange module to complete the heating of the water in the water outlet pipe, that is, the heating of the live water is completed. The liquid heat storage medium stored in the liquid storage cavity only circulates in the liquid storage cavity, and the impurities generated are very few, and no more scale will be generated, which will not affect the use of the electric water heater;

[0033] 2. When the water heater is used for a long time and the heat cannot meet the usage demand, the second heating module works to heat the circulation pipe, and / or the water outlet pipe, and / or the heat exchange module, thereby directly or indirectly transferring the heat to the running water flowing in the water outlet pipe, completing the heat supplement for the running water of insufficient temperature, thereby ensuring the stability of the final water outlet temperature of the water outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of the second heating module of the utility model being arranged in the second water outlet section;

[0035] Figure 2 This is a schematic diagram of the structure of the second heating module of the utility model being arranged in the circulation pipe state;

[0036] Figure 3 This is a schematic diagram of the structure of the second heating module of the utility model being arranged in the heat exchange module;

[0037] Figure 4 This is a schematic structural diagram of the second heating module of the utility model being arranged in the second water inlet section.

[0038] Among them, the meanings of the figure marks are as follows: 1. liquid storage chamber; 11. first heating module; 12. liquid heat storage medium; 13. first temperature sensor; 14. pressure relief valve; 2. circulation pipe; 21. water outlet; 22. water inlet; 23. first water inlet section; 24. first heat exchange section; 25. first water outlet section; 3. water outlet pipe; 31. second water inlet section; 32. second heat exchange section; 33. second water outlet section; 34. liquid replenishment pipe; 35. switch solenoid valve; 4. heat exchange module; 5. second heating module; 6. water pump; 7. second temperature sensor. DETAILED DESCRIPTION

[0039] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0043] See also Figure 1-Figure 4 As shown, the utility model discloses a running water type electric water heater: comprising: a liquid storage chamber 1, a circulation pipe 2, a water outlet pipe 3, a heat exchange module 4 and a second heating module 5, wherein the liquid storage chamber 1 is provided with a first heating module 11 and a liquid heat storage medium 12, the circulation pipe 2 has a water outlet 21 and a water inlet 22, the water outlet 21 and the water inlet 22 are both connected to the liquid storage chamber 1, a water pump 6 is provided on the circulation pipe 2, the circulation pipe 2 and the water outlet pipe 3 exchange heat through the heat exchange module 4, the circulation pipe 2 is provided with a second heating module 5, and / or the water outlet pipe 3 is provided with a second heating module 5, and / or the heat exchange module 4 is provided with a second heating module 5.

[0044] Specifically, the first heating module 11 heats the liquid heat storage medium 12 in the liquid storage chamber 1. The liquid heat storage medium 12 can be selected as a liquid with high specific heat capacity and stable properties according to needs. The openings at both ends of the circulation pipe 2 are respectively a water outlet 21 and a water inlet 22. The water inlet 22 and the water outlet 21 are both connected to the liquid storage chamber 1. A water pump 6 is provided on the pipeline of the circulation pipe 2. The water pump 6 drives the liquid heat storage medium 12 to circulate in the liquid storage chamber 1 and the circulation pipe 2. The circulation pipe 2 and the water outlet pipe 3 exchange heat through the heat exchange module 4. The second heating module 5 can be set on the circulation pipe 2, and / or, the water outlet pipe 3, and / or, the heat exchange module 4 according to needs. The following describes three separate settings:

[0045] When the second heating module 5 is arranged on the circulation pipe 2, refer to Figure 2As shown, it is equivalent to heating the circulation pipe 2 and the liquid heat storage medium 12 flowing in the circulation pipe 2, thereby ensuring that the liquid heat storage medium 12 transfers sufficient heat to the heat exchange module 4 within unit time and unit distance, so as to maintain the stability of the temperature of the live water heated in the water outlet pipe 3 and extend the time of using hot water.

[0046] When the second heating module 5 is arranged on the water outlet pipe 3, there are two cases. One case is that the second heating module 5 is arranged on the pipe section of the water outlet pipe 3 that has not been heated (i.e., the second water inlet section 31). Figure 4 As shown, the second heating module 5 heats the second water inlet section 31 of the water outlet pipe 3 based on the heat consumption in the liquid heat storage medium 12 (specifically, it can be judged based on the use time and the circulation volume of the water pump 6, or it can be judged based on the first temperature sensor 13 or the second temperature sensor 7 set in the subsequent optional scheme), so as to provide early heating for the situation that the live water cannot be heated to the preset temperature when flowing through the heat exchange module 4. Another situation is that the second heating module 5 is set at the pipe section of the water outlet pipe 3 that is being heated (i.e., the second heat exchange section 32) or the pipe section that has been heated (i.e., the second water outlet section 33). When it is set in the second heat exchange section 32 or the second water outlet section 33, as shown in FIG. Figure 1 As shown, it can directly supplement the corresponding heat based on the heat consumption in the liquid heat storage medium 12, and supplement the heat to the water outlet pipe 3 that has not met the heating demand, so as to achieve precise heating of the live water in the water outlet pipe 3 to ensure the stability of the water outlet temperature of the electric water heater.

[0047] When the second heating module 5 is arranged on the heat exchange module 4, refer to Figure 3 As shown, since the distance that the outlet pipe 3 flows through in the heat exchange module 4 is fixed, in order to ensure that the heat exchange module 4 can complete the heating task of the outlet pipe 3, it is necessary to ensure that the temperature difference between the heat exchange module 4 and the outlet pipe 3 remains constant, so as to ensure the heat transfer effect. Based on the above principle, a second heating module 5 is set on the heat exchange module 4, that is, when the liquid heat storage medium 12 circulates in the circulation pipe 2 and cannot heat the heat exchange module 4 to a predetermined temperature, the heat exchange module 4 is directly heated by the second heating module 5, so that the heating module can reach a predetermined temperature, thereby completing the task of heating the running water in the outlet pipe 3. In addition, the second heating module 5 heats the heat exchange module 4, and can also indirectly store heat for the liquid heat storage medium 12 flowing in the circulation pipe 2, thereby also improving the efficiency of heat storage of the liquid heat storage medium 12 during use.

[0048] The three cases of setting up a single second heating module 5 have been introduced above. For the case of setting up multiple second heating modules 5, it can be deduced based on the above content and will not be elaborated here.

[0049] In order to improve the monitoring of the temperature of the liquid heat storage medium 12 in the liquid storage chamber 1 and provide reference temperature information for the first heating module 11 and the second heating module 5, the first heating module 11 is electrically connected with a first temperature sensor 13. The first temperature sensor 13 is provided to facilitate monitoring the temperature of the liquid heat storage medium 12 filled in the liquid storage chamber 1, and to facilitate controlling the operation of the first heating module 11 and the second heating module 5. When the first temperature sensor 13 detects that the temperature of the liquid heat storage medium 12 is lower than the preset temperature, the first heating module 11 and / or the second heating module 5 work to complete the heat storage of the low liquid heat storage medium 12. Of course, when the first temperature sensor 13 detects that the temperature of the liquid heat storage medium 12 cannot meet the temperature requirement of the live water heating, the second heating module 5 is adjusted to heat the water outlet pipe 3, and / or the circulation pipe 2, and / or the heat exchange module 4 to supplement the heat, that is, the second heating module 5 can adjust its operation based on the temperature information monitored by the first temperature sensor 13.

[0050] Further, the second heating module 5 is electrically connected to a second temperature sensor 7, and the second temperature sensor 7 has a temperature monitoring point, and the temperature monitoring point is set at the circulation pipe 2, the water outlet pipe 3 or the heat exchange module 4. The second temperature sensor 7 is used to monitor the temperature at the circulation pipe 2, the water outlet pipe 3 or the heat exchange module 4, so as to adjust whether the second heating module 5 starts heating, the size of the heating power and the heating time.

[0051] Specifically, when the temperature monitoring point of the second temperature sensor 7 is set in the circulation pipe 2, it monitors the temperature in the circulation pipe 2. When the temperature of the liquid heat storage medium 12 flowing in the circulation pipe 2 is lower than the preset temperature, the second heating module 5 starts to work. According to the position and number of the second heating modules 5, the live water in the water outlet pipe 3 is directly or indirectly heated.

[0052] Similarly, when the temperature monitoring point of the second temperature sensor 7 is set at the water outlet pipe 3 or the heat exchange module 4, and when it is detected that the temperature at the temperature monitoring point is lower than the preset temperature, the second heating module 5 starts working, and according to the position and number of the second heating module 5, it directly or indirectly supplements heat for the live water in the water outlet pipe 3.

[0053] In some embodiments, the circulation pipe 2 includes a first water inlet section 23, a first heat exchange section 24 and a first water outlet section 25. The first heat exchange section 24 is a pipe located at the heat exchange module 4. The first water inlet section 23 is a pipe section between the water inlet 22 and the first heat exchange section 24. The first water outlet section 25 is a pipe section between the water outlet 21 and the first heat exchange section 24. The second heating module 5 is arranged in the first water inlet section 23, the first heat exchange section 24 or the first water outlet section 25. The above structure provides a variety of setting methods for the second heating module 5. The designer can set the second heating module 5 according to elements such as appearance and assembly convenience. Among them, it is best if the second heating module 5 is arranged at the first water inlet section 23, and the corresponding temperature monitoring point of the second temperature sensor 7 is also arranged at the first water inlet section 23 to cooperate with the second heating module 5. Since the circulation direction of the circulation pipe 2 is that the liquid heat storage medium 12 enters the circulation pipe 2 through the water inlet 22, the liquid heat storage medium 12 flows through the first water inlet section 23, the first heat exchange section 24 and the first water outlet section 25 in sequence, and then flows out through the water outlet 21. Therefore, the temperature monitoring points of the second heating module 5 and the second temperature sensor 7 are arranged at the first water inlet section 23, so that it can be found in time that the liquid heat storage medium 12 cannot meet the heating demand, and the liquid heat storage medium 12 can be supplemented with heat in time, thereby minimizing the temperature fluctuation of the live water heating.

[0054] In some embodiments, the water outlet pipe 3 includes a second water inlet section 31, a second heat exchange section 32 and a second water outlet section 33. The second heat exchange section 32 is a pipe located at the heat exchange module 4. The pipe section of the water outlet pipe 3 located upstream of the second heat exchange section 32 is the second water inlet section 31, and the pipe section of the water outlet pipe 3 located downstream of the second heat exchange section 32 is the second water outlet section 33. The second heating module 5 is arranged in the second water inlet section 31, the second heat exchange section 32 or the second water outlet section 33. The above structure provides a variety of setting methods for the second heating module 5. The designer can set the second heating module 5 according to the appearance, assembly convenience and other elements. Among them, setting in the second water inlet section 31 is better than setting in the second water outlet section 33.

[0055] In some embodiments, in order to ensure the quality of live water heating, the water outlet 21 and the water inlet 22 are set at different heights in the liquid storage chamber 1. Since the water outlet 21 is the pipe opening at the water outlet end of the circulation pipe 2, and the water inlet 22 is the pipe opening at the water inlet end of the circulation pipe 2. This structure can prevent the liquid heat storage medium 12 that has absorbed excessive heat by the heat exchange module 4 from being immediately pumped away by the water pump 6 again to participate in the circulation after the temperature drops. That is, the temperature of the liquid heat storage medium 12 at the water outlet 21 is relatively low, while the temperature of the liquid heat storage medium 12 far away from the water outlet 21 remains at the average temperature level in the liquid storage chamber 1. Therefore, the water inlet 22 will extract the liquid heat storage medium 12 far away from the water outlet 21 for circulating heat exchange to ensure the quality of live water heating. At the same time, this also provides the liquid heat storage medium 12 with a lowered temperature with sufficient time to complete the heat replenishment in the liquid storage chamber 1 so as to participate in the subsequent circulation.

[0056] In some embodiments, the liquid storage chamber 1 is further provided with a liquid replenishing tube 34 for replenishing the loss of the liquid heat storage medium 12. With the loss during use, the total amount of the liquid heat storage medium 12 will gradually decrease. Replenishment through the liquid replenishing tube 34 can ensure that the liquid heat storage medium 12 in the liquid storage chamber 1 can always store enough heat to meet the use requirements.

[0057] In this embodiment, the water outlet pipe 3 is provided with a branch pipe, and the branch pipe is a liquid replenishment pipe 34. The liquid replenishment pipe 34 connects the water outlet pipe 3 and the liquid storage chamber 1, and it is best for the liquid replenishment pipe 34 to be connected with the second water inlet section 31 of the water outlet pipe 3. When the branch pipe of the water outlet pipe 3 is used as the liquid replenishment pipe 34, the liquid heat storage medium 12 in the liquid storage chamber 1 is water, so that the condition that the water outlet pipe 3 directly replenishes the liquid heat storage medium 12 in the liquid storage chamber 1 can be met. The above structure uses a branch pipe at the water outlet pipe 3 as a liquid replenishment pipe 34 to replenish the liquid in the liquid storage chamber 1, saving design space, and water can be used for replenishment. Correspondingly, a switch solenoid valve 35 can be set at the branch pipe to automatically open and close for replenishment, and a manual one-way valve can also be set for manual replenishment. For specific liquid replenishment needs, a sensor can be set to monitor the volume or mass of the liquid heat storage medium 12 inside the liquid storage chamber 1 for automatic monitoring, or a transparent tube using the principle of a communicating vessel can be provided on one side of the liquid storage chamber 1 to observe the liquid level of the liquid heat storage medium 12 in the liquid storage chamber 1 by observing the liquid level in the transparent tube.

[0058] It should be noted that the liquid heat storage medium 12 replenished by the liquid replenishing pipe 34 is limited. Therefore, even if some liquid heat storage medium 12 is added, the impurities contained in the newly added liquid heat storage medium 12 are also limited, and no scale that affects the normal operation of the water heater will be generated.

[0059] In this embodiment, a pressure relief valve 14 is provided in the liquid storage chamber 1 to adjust the pressure inside the liquid storage chamber 1. Since the liquid heat storage medium 12 may be vaporized when heated, the pressure relief valve 14 can safely release excessive pressure, thereby improving the safety of the electric water heater.

[0060] In this embodiment, the heat exchange module 4 adopts an efficient plate heat exchanger, a fin heat exchanger or a microchannel heat exchange structure to achieve rapid heat exchange. The plate heat exchanger has high heat exchange efficiency and durability, and is very suitable for the heat exchange requirements in the process of heating running water. The microchannel heat exchange structure is composed of a plurality of small-diameter pipes (i.e., microtubes) coiled and arranged, which increases the contact area of ​​running water per unit time in disguised form, thereby improving the heating efficiency. Of course, other efficient and durable heat exchangers can also be used to undertake heat exchange work.

[0061] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A running water electric water heater, It is characterized in that include: A liquid storage chamber, wherein a first heating module and a liquid heat storage medium are arranged in the liquid storage chamber; A circulation pipe, wherein the circulation pipe has a water outlet and a water inlet, the water outlet and the water inlet are both connected to the liquid storage chamber, and a water pump is provided on the circulation pipe; Outlet pipe; A heat exchange module, through which the circulation pipe and the water outlet pipe exchange heat; The second heating module: the circulation pipe is provided with the second heating module, and / or the water outlet pipe is provided with the second heating module, and / or the heat exchange module is provided with the second heating module.

2. A running water electric water heater according to claim 1, It is characterized in that The first heating module is electrically connected to a first temperature sensor.

3. A running water electric water heater according to claim 1, It is characterized in that The second heating module is electrically connected to a second temperature sensor, and the second temperature sensor has a temperature monitoring point, and the temperature monitoring point is arranged on at least one of the circulation pipe, the water outlet pipe and the heat exchange module.

4. A running water type electric water heater according to claim 1, It is characterized in that The circulation pipe includes a first water inlet section, a first heat exchange section and a first water outlet section. The first heat exchange section is a pipeline located at the heat exchange module. The first water inlet section is a pipe section between the water inlet and the first heat exchange section. The first water outlet section is a pipe section between the water outlet and the first heat exchange section. The second heating module is arranged in the first water inlet section, the first heat exchange section or the first water outlet section.

5. A running water electric water heater according to claim 1, It is characterized in that The water outlet pipe includes a second water inlet section, a second heat exchange section and a second water outlet section. The second heat exchange section is a pipeline located at the heat exchange module. The section of the water outlet pipe located upstream of the second heat exchange section is the second water inlet section, and the section of the water outlet pipe located downstream of the second heat exchange section is the second water outlet section. The second heating module is arranged in the second water inlet section, the second heat exchange section or the second water outlet section.

6. A running water electric water heater according to claim 1, It is characterized in that The water outlet and the water inlet are at different heights in the liquid storage cavity.

7. A running water electric water heater according to any one of claims 1 to 6, It is characterized in that The liquid storage cavity is connected with a liquid infusion tube.

8. A running water electric water heater according to any one of claims 1 to 6, It is characterized in that The water outlet pipe is provided with a branch pipe, and the branch pipe is a liquid replenishing pipe, and the liquid replenishing pipe connects the water outlet pipe and the liquid storage cavity.

9. A running water electric water heater according to any one of claims 1 to 6, It is characterized in that The heat exchange module is a plate heat exchanger, a fin heat exchanger or a microchannel heat exchange structure.

10. A running water type electric water heater according to any one of claims 1 to 6, It is characterized in that The liquid storage chamber is provided with a pressure relief valve.

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