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 and a heat exchange module, a 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, the circulating pipe is provided with a water pump, and the water pump is communicated with the liquid storage cavity. The circulating pipe exchanges heat with the water outlet pipe through the heat exchange module, the interior of the liquid storage cavity is heated, a liquid heat storage medium in the liquid storage cavity is circulated through the circulating pipe, then heat is transferred to the water outlet pipe through the heat exchange module, water in the water outlet pipe is heated, and flowing water heating is completed. Water flowing in the water outlet pipe is heated in a flowing mode, the liquid heat storage medium stored in the liquid storage cavity only circulates in the liquid storage cavity, few impurities are generated, and it is avoided that too much scale is generated, so that use of the electric water heater is affected.

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 into hot water within a certain period of time. Ordinary electric water heaters in the prior art have a small water mixing volume and a large volume. In addition, some storage-type electric water heaters heat water inside the electric water heater, which will produce scale during the heating process. In addition, the scale produced during long-term use will cause the water quality to deteriorate and even cause blockage, affecting the normal use of the water heater. Utility Model Content

[0003] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a running water electric water heater, which can solve the problem that the heating of water inside the electric water heater causes a lot of scale to be generated inside the electric water heater, thus affecting the normal use of the electric water heater.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A running water type electric water heater, comprising:

[0006] A liquid storage cavity, wherein a heating module and a liquid heat storage medium are arranged in the liquid storage cavity;

[0007] 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;

[0008] Outlet pipe;

[0009] A heat exchange module, wherein the circulation pipe and the water outlet pipe exchange heat through the heat exchange module.

[0010] By adopting the above scheme, the heating module heats the liquid heat storage medium in the liquid storage chamber, circulates the liquid heat storage medium in the liquid storage chamber through the circulation pipe, and then transfers the heat to the water outlet pipe through the heat exchange module, thereby completing the heating of the water in the water outlet pipe, that is, completing the living water heating, and performing flow heating on the water flowing in the water outlet pipe. The liquid heat storage medium stored in the liquid storage chamber only circulates in the liquid storage chamber, and produces very few impurities, and will not produce much scale, thereby not affecting the use of the electric water heater.

[0011] Furthermore, a first temperature sensor is provided in the liquid storage cavity.

[0012] 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.

[0013] Furthermore, the water outlet pipe is provided with a flow regulating structure for regulating the flow of the water outlet pipe.

[0014] By adopting the above solution, the flow rate of the water pipe is adjusted through the flow regulating structure, thereby reducing the fluctuation of the outlet water temperature.

[0015] Furthermore, the flow regulating structure includes a water flow regulating valve and a water flow sensor, and the water flow regulating valve is electrically connected to the water flow sensor.

[0016] By adopting the above solution, the flux of the water flow regulating valve is adjusted by cooperating with the water flow sensor and combining the water flow information monitored by the water flow sensor.

[0017] Furthermore, the water outlet pipe includes a heat exchange section and a water outlet section, the heat exchange section is a pipe section located at the heat exchange module, the pipe section of the water outlet pipe located downstream of the heat exchange section is the water outlet section, and the heat exchange section or the water outlet section is provided with a second temperature sensor.

[0018] By adopting the above solution, the flow regulating structure can adjust the flow regulating structure accordingly according to the temperature monitored by the second temperature sensor, thereby improving the regulation accuracy.

[0019] Furthermore, the water outlet and the water inlet are at different heights in the liquid storage chamber.

[0020] 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.

[0021] Furthermore, the liquid storage chamber is connected with a liquid infusion tube.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Furthermore, the heat exchange module is a plate heat exchanger or a microchannel heat exchange structure.

[0026] By adopting the above solution, the plate heat exchanger and the microchannel heat exchange structure have high heat exchange efficiency and are suitable for rapid heat exchange scenarios during live water heating.

[0027] Furthermore, the liquid storage chamber is provided with a pressure relief valve.

[0028] By adopting the above solution, the pressure inside the liquid storage chamber can be easily adjusted, thereby improving safety.

[0029] In summary, the utility model provides a running water type electric water heater with the following technical effects:

[0030] The liquid storage chamber is heated, the liquid heat storage medium in the liquid storage chamber is circulated through the circulation pipe, and the heat is then transferred to the water outlet pipe through the heat exchange module to complete the heating of the water in the water outlet pipe, that is, the living water heating is completed, 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 small, and no more scale will be generated to affect the use of the electric water heater, thereby extending the service life of the electric water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the running water type electric water heater of the utility model.

[0032] Among them, the meanings of the figure marks are as follows: 1. liquid storage chamber; 11. heating module; 12. liquid heat storage medium; 13. first temperature sensor; 14. pressure relief valve; 2. circulation pipe; 21. water outlet; 22. water inlet; 3. water outlet pipe; 31. heat exchange section; 32. water outlet section; 33. flow regulating structure; 34. liquid replenishing pipe; 35. switch solenoid valve; 4. heat exchange module; 5. water pump. DETAILED DESCRIPTION

[0033] For better understanding and implementation, the technical solutions in the embodiments of the utility model will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the utility model. Obviously, what is described here is only a part of the examples of the utility model, not all the examples. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] See also Figure 1 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 and a heat exchange module 4. A heating module 11 and a liquid heat storage medium 12 are arranged in the liquid storage chamber 1. The circulation pipe 2 has a water outlet 21 and a water inlet 22. Both the water outlet 21 and the water inlet 22 are connected to the liquid storage chamber 1. A water pump 5 is arranged on the circulation pipe 2. The circulation pipe 2 and the water outlet pipe 3 exchange heat through the heat exchange module 4.

[0038] Specifically, when in use, the liquid storage chamber 1 is filled with a liquid heat storage medium 12 that can store heat and conduct heat through the heat exchange module 4. A heating module 11 is provided in the liquid storage chamber 1. The heating module 11 heats the liquid heat storage medium 12 to complete the heat storage work. The two ends of the circulation pipe 2 are respectively 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 5 is provided on the pipeline of the circulation pipe 2. The water pump 5 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.

[0039] The specific working principle of the above structure is:

[0040] The heating module 11 heats and stores the liquid heat storage medium 12 filled in the liquid storage chamber 1. When it is necessary to heat the live water, the water pump 5 is turned on, and the liquid heat storage medium 12 begins to circulate in the circulation pipe 2 and the liquid storage chamber 1. During the circulation process, the heat is transferred to the heat exchange module 4, and the heat exchange module 4 transfers the heat to the outlet pipe 3 to complete the heating of the flowing water in the outlet pipe 3, that is, the live water heating. In the above, the flowing water in the outlet pipe 3 is heated, and the liquid heat storage medium 12 stored in the liquid storage chamber 1 only circulates in the liquid storage chamber 1. It produces very few impurities and will not produce much scale, which will affect the use of the electric water heater, thereby extending the service life of the electric water heater.

[0041] It should be noted that the specific heat storage time can be heated according to the preset heating time, and the heat storage time for the heating module 11 to perform supplementary heating can also be determined according to the specific heating time and the working cycle time of the water pump 5. In addition, the liquid storage chamber 1 can also be provided with a specific insulation shell as required. The liquid heat storage medium 12 in the liquid storage chamber 1 can be water, oil or other liquid heat storage medium 12 with high specific heat capacity and stable chemical properties.

[0042] In order to improve the accuracy of monitoring the temperature of the liquid heat storage medium 12 in the liquid storage chamber 1, a first temperature sensor 13 is provided in the liquid storage chamber 1. 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, so as to facilitate controlling the operation of the heating module 11. When the first temperature sensor 13 detects that the temperature of the liquid heat storage medium 12 is lower than the preset temperature, the heating module 11 works to complete the heat storage of the liquid heat storage medium 12.

[0043] In some embodiments, in order to ensure the stability of the outlet water temperature of the outlet pipe 3, the outlet pipe 3 is provided with a flow regulating structure 33 for regulating the flow of the outlet pipe 3. The specific working principle of the above structure is: when the first temperature sensor 13 detects that the temperature of the liquid heat storage medium 12 is low, the temperature difference between the liquid heat storage medium 12 and the heat exchange module 4 becomes smaller, resulting in less heat transferred per unit time. At this time, the water output of the outlet pipe 3 is adjusted by the flow regulating structure 33 to achieve the purpose of stabilizing the outlet water temperature of the outlet pipe 3. The specific adjustment of the flow regulating structure 33 is illustrated below by example, which is not the only adjustment method. For example, when the first temperature sensor 13 monitors a temperature of 60 degrees Celsius, the flow regulating structure 33 corresponds to 100% of the flow; when the first temperature sensor 13 monitors a temperature of 55 degrees Celsius, the flow regulating structure 33 corresponds to 85% of the flow; when the first temperature sensor 13 monitors a temperature of 50 degrees Celsius, the flow regulating structure 33 corresponds to 70% of the flow, etc. The above is just an example, and does not limit the specific adjustment method of the flow regulating structure 33 of the utility model.

[0044] In this embodiment, the flow regulating structure 33 includes a water flow regulating valve and a water flow sensor, and the water flow regulating valve is electrically connected to the water flow sensor to adjust the flux of the water flow regulating valve in combination with the water flow information monitored by the water flow sensor. Specifically, the water flow regulating valve is a solenoid valve that can control the water flow, and the water flow sensor monitors the water flow information after the water flow regulating valve is regulated, thereby ensuring the accuracy of the water flow regulating valve regulation, and further achieving the control of the stability of the water outlet temperature of the water outlet pipe 3.

[0045] In some embodiments, in order to further increase the outlet water temperature of the outlet pipe 3, the outlet pipe 3 includes a heat exchange section 31 and a water outlet section 32. The heat exchange section 31 is a pipe section located at the heat exchange module 4, and the pipe section of the outlet pipe 3 located downstream of the heat exchange section 31 is the water outlet section 32. The heat exchange section 31 or the water outlet section 32 is provided with a second temperature sensor.

[0046] Specifically, some sections of the water outlet pipe 3 are divided into a heat exchange section 31 and a water outlet section 32 according to the water flow direction. The heat exchange section 31 is a section located at the heat exchange module 4. The section of the water outlet pipe 3 located downstream of the heat exchange section 31 is the water outlet section 32. A second temperature sensor is provided in the heat exchange section 31 or the water outlet section 32. When the second temperature sensor is provided, the electric water heater can feed back the temperature signal of the second temperature sensor to the water flow regulating valve, and the water flow regulating valve adjusts the flow rate based on the temperature signal of the second temperature sensor. When the second temperature sensor is provided, there is no need to adjust based on the information of the first temperature sensor 13.

[0047] In some embodiments, in order to ensure the quality of live water heating, the water outlet 21 and the water inlet 22 are at different heights in the liquid storage chamber 1, wherein 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. The water outlet 21 and the water inlet 22 are arranged at different heights in the liquid storage chamber 1. During the water circulation process, the liquid heat storage medium 12 in the circulation pipe 2 will pass through the heat exchange module 4 for heat exchange, and the temperature will decrease. The water outlet 21 and the water inlet 22 of the circulation pipe 2 are arranged at a height difference. It can be ensured that the liquid heat storage medium 12 with a lowered temperature will not be immediately pumped away by the water pump 5 again to participate in the circulation, that is, the temperature of the liquid heat storage medium 12 at the water outlet 21 of the liquid storage chamber 1 will be lower, and the temperature of the liquid heat storage medium 12 far away from the water outlet 21 will be higher. Therefore, the water inlet 22 extracts the liquid heat storage medium 12 far away from the water outlet 21 for circulating heat exchange, thereby ensuring the quality of live water heating, and at the same time providing the liquid heat storage medium 12 with a lowered temperature with sufficient time to complete the heat replenishment in the liquid storage chamber 1 and participate in the subsequent circulation.

[0048] In some embodiments, the liquid storage chamber 1 is connected to a liquid replenishing tube 34. Since the liquid heat storage medium 12 in the liquid storage chamber 1 will produce a certain amount of loss during use, after the loss reaches a certain value, it is replenished through the liquid replenishing tube 34 to ensure that the total amount of heat that can be stored by the liquid heat storage medium 12 in the liquid storage chamber 1 can meet the use requirements.

[0049] 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. 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 storage chamber 1 with the liquid heat storage medium 12 can be met. The above structure saves design space by setting a branch pipe at the water outlet pipe 3 as the liquid replenishment pipe 34 to replenish the liquid in the liquid storage chamber 1, 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 liquid replenishment, or a manual one-way valve can be set for manual liquid replenishment. For specific liquid replenishment needs, a sensor that monitors the volume or mass of the liquid heat storage medium 12 inside the liquid storage chamber 1 for automatic monitoring can be set, or a transparent tube using the principle of a communicating vessel can be set on one side of the liquid storage chamber 1, and the liquid level of the liquid heat storage medium 12 in the liquid storage chamber 1 can be observed by observing the liquid level in the transparent tube.

[0050] 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.

[0051] In this embodiment, the heat exchange module 4 is a plate heat exchanger or a microchannel heat exchange structure. The plate heat exchanger and the microchannel heat exchange structure have high heat exchange efficiency and are suitable for the rapid heat exchange scenario during the heating of running water. The microchannel heat exchange structure is a coiled arrangement of multiple small-diameter pipes (i.e., microtubes), which increases the contact area of ​​running water per unit time in disguised form, thereby improving the heating efficiency. Of course, the heat exchanger can also use other heat exchangers with high heat exchange efficiency and good durability to undertake the heat exchange work.

[0052] In this embodiment, the liquid storage chamber 1 is provided with a pressure relief valve 14. Since some materials of the liquid heat storage medium 12 in the liquid storage chamber 1 will vaporize when heated, the pressure relief valve 14 can be provided to facilitate the adjustment of the pressure inside the liquid storage chamber 1 and improve safety.

[0053] The working principle of this utility model:

[0054] Heat storage stage: the heating module 11 heats the liquid heat storage medium 12 in the liquid storage chamber 1, and the first temperature sensor 13 monitors the temperature of the liquid heat storage medium 12. When the liquid heat storage medium 12 is heated to a temperature threshold, the heating module 11 stops working.

[0055] Live water heating stage: open the valve of the water outlet pipe 3, and turn on the water pump 5 at the same time, the liquid heat storage medium 12 circulates between the circulation pipe 2 and the liquid storage chamber 1, and during the circulation process, the heat is transferred to the heat exchange module 4, the heat exchange module 4 transfers the heat to the water outlet pipe 3, and the water outlet pipe 3 transfers the received heat to the water in the water outlet pipe 3, completing the live water heating.

[0056] During continuous use, the flow regulating structure 33 controls the water output according to the temperature monitored by the second temperature sensor to ensure that the water output can meet the usage requirements. The first temperature sensor 13 monitors the temperature of the liquid heat storage medium 12. When the temperature is lower than the preset temperature, the heating module 11 is turned on to supplement the heat of the liquid heat storage medium 12, thereby achieving continuous hot water use.

[0057] 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, characterized in that: include: A liquid storage cavity, wherein a heating module and a liquid heat storage medium are arranged in the liquid storage cavity; 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, wherein the circulation pipe and the water outlet pipe exchange heat through the heat exchange module.

2. A running water type electric water heater according to claim 1, characterized in that: A first temperature sensor is arranged in the liquid storage cavity.

3. A running water type electric water heater according to claim 1, characterized in that: The water outlet pipe is provided with a flow regulating structure for regulating the flow of the water outlet pipe.

4. A running water type electric water heater according to claim 3, characterized in that: The flow regulating structure includes a water flow regulating valve and a water flow sensor, and the water flow regulating valve is electrically connected to the water flow sensor.

5. A running water type electric water heater according to claim 1, characterized in that: The water outlet pipe includes a heat exchange section and a water outlet section. The heat exchange section is a pipe section located at the heat exchange module. The pipe section of the water outlet pipe located downstream of the heat exchange section is the water outlet section. The heat exchange section or the water outlet section is provided with a second temperature sensor.

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

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

8. A running water type electric water heater according to any one of claims 1 to 6, 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 type electric water heater according to any one of claims 1 to 6, characterized in that: The heat exchange module is a plate 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, characterized in that: The liquid storage chamber is provided with a pressure relief valve.

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