Double-barrel running water type electric water heater

Abstract

The utility model discloses a double-barrel running water type electric water heater which comprises a first cavity, a second cavity, a circulating pipe, a liquid heat storage medium, a first heating module, a water outlet pipe and a heat exchange module, the circulating pipe is communicated with the first cavity and the second cavity, the circulating pipe is provided with a water pump, and the liquid heat storage medium circulates in the first cavity, the second cavity and the circulating pipe. The first heating module is arranged in the first cavity or the second cavity, the first heating module is used for heating the liquid heat storage medium, the circulating pipe and the water outlet pipe conduct heat exchange through the heat exchange module, only the liquid heat storage medium circulates in the first cavity, the second cavity and the circulating pipe of the electric water heater, and much water scale cannot be generated; the liquid heat storage medium flows from one cavity to the other cavity, the liquid heat storage medium which absorbs heat in the flowing process is stored by the other cavity, the liquid heat storage medium flowing out of the cavity of the liquid heat storage medium cannot be influenced by the liquid heat storage medium which absorbs heat to be cooled, and the stability of the final water outlet temperature of the water outlet pipe is guaranteed.

Description

Technical Field

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

[0002] In modern life, water heaters are one of the indispensable devices in our daily life. By utilizing various electricity or gas, it can heat cold water into hot water in a relatively short time, providing users with a comfortable bathing, cleaning and cooking experience.

[0003] Storage electric water heaters are a common type of water heater, and their working principle is relatively simple and efficient. In this type of water heater, water first enters the electric heater to be heated, and the temperature of the cold water is quickly raised through the conversion of electrical energy. The heated water is then stored in the storage tank of the electric heater for use at any time. Since we often need to use hot water, the electric heater will continue to heat it to maintain the water temperature in the storage tank.

[0004] However, as time goes by and with long-term use, a deposit called scale will form in the water heater. Scale is mainly formed by the precipitation of minerals such as calcium and magnesium dissolved in water, and will adhere to the inner wall of the heater and the heat exchange surface. Some heating wires or heating tubes are directly in contact with the heated water, and a large amount of scale will also adhere to the surface of the heating wires and heating tubes, thus affecting subsequent heating. The accumulation of these scales will lead to a weakening of heat conduction, so that the electric heater requires more energy to heat the water to the required temperature, thereby reducing the efficiency of the water heater. More importantly, scale not only affects the heating efficiency, but after a large amount of scale accumulates, it will also cause the water quality to deteriorate and even cause blockage, affecting the normal use of the electric water heater.

[0005] In addition to the scaling problem, the prior art mainly uses a single heat storage tank for circulating heat exchange. During the circulation process, the liquid heat storage medium that has absorbed heat is mixed into the heat storage tank of the electric heater, which will directly reduce the temperature of the liquid heat storage medium that has not absorbed heat, thereby directly affecting the heat outlet temperature of the final water outlet pipe. Utility Model Content

[0006] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a double-barrel live water type 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 water temperature of the water outlet pipe drops rapidly during use.

[0007] The technical solution adopted by the utility model to solve the problem is:

[0008] A double-barrel running water type electric water heater, comprising:

[0009] a first cavity;

[0010] A second cavity;

[0011] a circulation pipe, the circulation pipe connecting the first cavity and the second cavity, and the circulation pipe is provided with a water pump;

[0012] A liquid heat storage medium, the liquid heat storage medium flows back and forth in the first cavity (11), the circulation pipe and the second cavity in sequence;

[0013] A first heating module, the first heating module is arranged in the first cavity or the second cavity or on the circulation pipe, and the first heating module is used to heat the liquid heat storage medium;

[0014] Outlet pipe;

[0015] A heat exchange module, wherein the circulation pipe and the water outlet pipe exchange heat through the heat exchange module.

[0016] By adopting the above scheme, the first heating module is used to heat the liquid heat storage medium, and the liquid heat storage medium circulates between the first cavity, the second cavity and the circulation pipe through the cooperation of the circulation pipe and the water pump. Only the liquid heat storage medium circulates in the first cavity, the second cavity and the circulation pipe of the electric water heater, and the impurities produced by it are very few, and no more scale will be produced, thereby affecting the use of the electric water heater. In addition, when the liquid heat storage medium is in use, it flows in one direction, that is, it flows from one cavity to another cavity (from the first cavity to the second cavity, or from the second cavity to the first cavity). During the flow process, the low-temperature liquid heat storage medium after heat exchange by the heat exchange module is stored in another cavity, and will not flow back to the cavity as the outflow of the high-temperature liquid heat storage medium. Therefore, the high-temperature liquid heat storage medium in the cavity will not gradually cool down as the heat exchange time with the outlet pipe increases, thereby ensuring the stability of the final water outlet temperature of the outlet pipe.

[0017] Furthermore, it also includes a second heating module, the first heating module is arranged in the first cavity, and the second heating module is arranged in the pipe section of the circulation pipe close to the second cavity and / or in the second cavity.

[0018] By adopting the above solution, the second heating module is arranged in the circulation pipe or the second cavity. When the second heating module is arranged on the circulation pipe, when the liquid heat storage medium flows back to the first cavity through the second cavity, the circulation pipe can be heated to indirectly supplement the heat for the liquid heat storage medium flowing in the circulation pipe, thereby also achieving heat supplementation during the reflux process, thereby ensuring that the live water heating effect that meets the temperature requirements can be achieved during the reflux process of the liquid heat storage medium;

[0019] When the second heating module is arranged in the second cavity, when the liquid heat storage medium flows into the second cavity, the second heating module can supplementally heat the liquid heat storage medium after absorbing heat, thereby achieving the effect of meeting the heating temperature requirement of the running water when the liquid heat storage medium refluxes.

[0020] Furthermore, the first heating module is electrically connected to a first temperature sensor for controlling the operation of the first heating module.

[0021] 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 first cavity or the second cavity, so as to facilitate the control of the operation of the heating module.

[0022] Furthermore, the second heating module is electrically connected to a second temperature sensor for controlling the operation of the second heating module.

[0023] 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.

[0024] Furthermore, the circulation pipe and the water outlet pipe are arranged parallel to and pass through the heat exchange module.

[0025] By adopting the above solution, the installation of the circulation pipe and the water outlet pipe on the heat exchange module is facilitated.

[0026] Furthermore, the circulation pipe passes through the heat exchange module portion and is arranged in a winding manner, and / or the water outlet pipe passes through the heat exchange module portion and is arranged in a winding manner.

[0027] By adopting the above solution, the winding arrangement can extend the time of passing through the heat exchange module, thereby ensuring the heat exchange effect.

[0028] Furthermore, it also includes a shell, and the first cavity and the second cavity are arranged inside the shell.

[0029] By adopting the above solution, the first cavity and the second cavity are integrated through a shell and installed and used as a whole.

[0030] Furthermore, the first cavity and / or the second cavity is connected to a fluid infusion tube.

[0031] By adopting the above solution, the liquid heat storage medium will produce a certain amount of loss when in use. When the loss reaches a certain value, it is replenished through the liquid replenishment tube to ensure that the total amount of heat that can be stored in the liquid heat storage medium can meet the use demand. Connecting the second cavity can ensure that the liquid heat storage medium that has stored heat in the first cavity can be used normally.

[0032] 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 and the second cavity.

[0033] 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 second cavity, thereby saving design space and using water for replenishment.

[0034] Furthermore, the first cavity and / or the second cavity is provided with a pressure relief valve.

[0035] By adopting the above solution, since the liquid heat storage medium may be vaporized when heated, the excessive pressure can be safely released through the pressure relief valve, thereby improving the safety of the electric water heater.

[0036] In summary, the double-barrel running water type electric water heater provided by the utility model has the following technical effects:

[0037] 1. Only liquid heat storage medium circulates in the first cavity, the second cavity and the circulation pipe of the electric water heater, which produces very few impurities and will not produce much scale, thus affecting the use of the electric water heater;

[0038] 2. When the liquid heat storage medium is in use, it flows from one cavity to another cavity. The liquid heat storage medium that absorbs heat during the flow process is stored in the other cavity. Therefore, the liquid heat storage medium in the cavity that flows out of the liquid heat storage medium will not be affected by the liquid heat storage medium that absorbs heat and cool down, thereby ensuring the stability of the final water outlet temperature of the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a double-barrel live water type electric water heater of the present utility model.

[0040] Among them, the meanings of the figure numbers are as follows: 1. Shell; 11. First cavity; 12. Second cavity; 13. First heating module; 14. First temperature sensor; 15. Second temperature sensor; 16. Pressure relief valve; 2. Liquid heat storage medium; 3. Circulation pipe; 4. Water outlet pipe; 41. Liquid replenishment pipe; 42. Switch solenoid valve; 5. Heat exchange module; 6. Second heating module; 7. Water pump. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] See also Figure 1 As shown, the utility model discloses a double-barrel live water type electric water heater, comprising a first cavity 11, a second cavity 12, a circulation pipe 3, a liquid heat storage medium 2, a first heating module 13, a water outlet pipe 4 and a heat exchange module 5, the circulation pipe 3 connects the first cavity 11 and the second cavity 12, and a water pump 7 is provided on the circulation pipe 3; the liquid heat storage medium 2 circulates in the first cavity 11, the second cavity 12 and the circulation pipe 3, the first heating module 13 is arranged in the first cavity 11 or the second cavity 12, the first heating module 13 is used to heat the liquid heat storage medium 2, and the circulation pipe 3 and the water outlet pipe 4 exchange heat through the heat exchange module 5.

[0046] Specifically, the first cavity 11 and the second cavity 12 are connected through the circulation pipe 3, and the liquid heat storage medium 2 circulates in the first cavity 11, the second cavity 12 and the circulation pipe 3. The water pump 7 is arranged on the circulation pipe 3. The water pump 7 is a two-way water pump 7, which can transfer the liquid heat storage medium 2 in the first cavity 11 to the second cavity 12, and can also transfer the liquid heat storage medium 2 in the second cavity 12 to the first cavity 11. The circulation pipe 3 and the outlet pipe 4 exchange heat through the heat exchange module 5. The heat exchange module 5 can be used with a structure and material with a high thermal conductivity, such as a plate heat exchanger. The first heating module 13 can be arranged in the first cavity 11 or the second cavity 12 or on the circulation pipe 3. The cavity where the first heating module 13 is arranged can be the cavity where the liquid heat storage medium 2 is located during the heat storage process. In this embodiment, the first heating module 13 is arranged in the first cavity 11, and heats the liquid heat storage medium 2 in the first cavity 11 during the heat storage process.

[0047] The following is an example of the working principle when the first heating module 13 is disposed in the first cavity 11:

[0048] Heat storage stage: the liquid heat storage medium 2 is stored in the first cavity 11, and the first heating module 13 works to heat the liquid heat storage medium 2 in the first cavity 11 to complete heat storage. When part or all of the liquid heat storage medium 2 is located in the second cavity 12, the liquid heat storage medium 2 is preferentially pumped into the first cavity 11 to complete heat storage.

[0049] Live water heating stage: open the valve of the water outlet pipe 4, the water in the water outlet pipe 4 starts to flow, at the same time, turn on the water pump 7, the water pump 7 pumps the liquid heat storage medium 2 in the first cavity 11 into the second cavity 12, when the liquid heat storage medium 2 flows through the heat exchange module 5, the liquid heat storage medium 2 transfers the heat to the heat exchange module 5 through the circulation pipe 3, the heat exchange module 5 transfers the heat to the water outlet pipe 4, the water outlet pipe 4 transfers the heat to the water flowing in the water outlet pipe 4, thus completing the heating of the water in the flow process, that is, live water heating. Only the liquid heat storage medium 2 circulates in the first cavity 11, the second cavity 12 and the circulation pipe 3, and the impurities produced by it are very few, and no more scale will be produced, which will affect the use of the electric water heater.

[0050] In daily use: first carry out the heat storage stage, after completing the heat storage, open the valves of the water pump 7 and the water outlet pipe 4, at the same time, the water pump 7 pumps the liquid heat storage medium 2 in the first cavity 11 into the second cavity 12, and completes the heating of the live water in the water outlet pipe 4 during the flow of the high-temperature liquid heat storage medium 2 and the live water. After being absorbed during the flow process, it becomes a low-temperature liquid heat storage medium 2 and is stored in the second cavity 12. Therefore, as the first cavity 11 that flows out the high-temperature liquid heat storage medium 2, the high-temperature liquid heat storage medium 2 therein will not cool down as the heat exchange time increases, thereby ensuring the stability of the final water outlet temperature of the water outlet pipe 4. When all the liquid heat storage medium 2 in the first cavity 11 flows to the second cavity 12, there are mainly two usage scenarios:

[0051] First, in the scenario where hot water is still needed, the water pump 7 is reversed to pump the liquid heat storage medium 2 in the second cavity 12 into the first cavity 11 through the circulation pipe 3. During the pumping process, a certain amount of heating can still be performed. After the liquid heat storage medium 2 is pumped into the first cavity 11, the first heating module 13 starts to work to supplement the heat of the liquid heat storage medium 2. The best usage is to wait until the first heating module 13 completes the heating and then circulate it for use. Of course, the liquid heat storage medium 2 can also be repeatedly pumped during the heating process to heat the live water.

[0052] Secondly, the demand for using hot water at a higher temperature has been met. For example, taking a shower has been completed and no further heating is needed. The liquid heat storage medium 2 in the second cavity 12 still has a certain amount of residual heat. At this time, when the hot water switch of the faucet is turned on, the water pump 7 starts to work. The water pump 7 pumps the liquid heat storage medium 2 from the second cavity 12 to the first cavity 11 through the circulation pipe 3. During the pumping process, when the liquid heat storage medium 2 passes through the circulation pipe 3 located in the heat exchange module 5, the residual heat is transferred to the heat exchange module 5. The residual heat is transferred to the water outlet pipe 4 after passing through the heat exchange module 5. The water outlet pipe 4 transfers the residual heat to the running water flowing in the water outlet pipe 4 to complete the heating of the running water. The heating temperature is not as high as the heating temperature when the first cavity 11 starts to flow to the second cavity 12, but the heating can still be completed for use scenarios such as washing dishes, washing clothes, washing hands, and washing face, which do not have such high temperature requirements.

[0053] Similarly, the usage and usage scenario of disposing the first heating module 13 in the second cavity 12 are similar to those of disposing the first heating module 13 in the first cavity 11 , and will not be elaborated herein.

[0054] When the first heating module 13 is disposed on the circulation pipe 3 , it is equivalent to heating the liquid heat storage medium 2 during its flow. The specific usage method and usage scenario will not be elaborated here.

[0055] It should be noted that the volumes of the first cavity 11 and the second cavity 12 can be set according to the use requirements, and it is best to meet the bathing needs in one cycle. The specific heat storage time can be heated according to the preset heating time, and the heat storage time for the first heating module 13 to perform supplementary heating can also be determined according to the specific heating time and the working cycle time of the water pump 7. In addition, the liquid heat storage medium 2 can be water, oil or other liquid heat storage medium 2 with high specific heat capacity and stable chemical properties.

[0056] Furthermore, in order to further improve the stability and sustainability of live water heating, the electric water heater of the present invention also includes a second heating module 6 , the first heating module 13 is disposed in the first cavity 11 , and the second heating module 6 is disposed in the circulation pipe 3 or the second cavity 12 .

[0057] Specifically, the first heating module 13 is arranged in the first cavity 11, and the second heating module 6 is arranged in the circulation pipe 3 or the second cavity 12. The following will use the two cases where the second heating module 6 is arranged on the circulation pipe 3 and the second heating module 6 is arranged in the second cavity 12 as examples.

[0058] When the second heating module 6 is arranged on the circulation pipe 3, the specific working principle is as follows:

[0059] The circulation pipe 3 is arranged through the heat exchange module 5, and can be divided into a first pipe section, a second pipe section and a third pipe section according to the orientation of the circulation pipe 3 relative to the heat exchange module 5, wherein the first pipe section is the pipe section between the heat exchange module 5 and the first cavity 11, the second pipe section is the pipe section located in the heat exchange module 5, and the third pipe section is the pipe section between the heat exchange module 5 and the second cavity 12.

[0060] When the second heating module 6 is arranged in the first pipe section, it is mainly used for when the liquid heat storage medium 2 flows back from the second cavity 12 to the first cavity 11. The second heating module 6 supplements heat for the liquid heat storage medium 2 flowing through the first pipe section, thereby improving the rapid heat supplement in the process of continuous circulation of the liquid heat storage medium 2, thereby improving the stability and continuity of the heating of the live water.

[0061] When the second heating module 6 is arranged in the second pipe section, after the liquid heat storage medium 2 in the heat storage stage in the first cavity 11 flows to the second cavity 12, when hot water needs to be used continuously, the liquid heat storage medium 2 flows back from the second cavity 12 to the first cavity 11, and when the liquid heat storage medium 2 flows through the second pipe section, the second heating module 6 supplements the heat of the liquid heat storage medium 2. After the supplement, the liquid heat storage medium 2 can reach a temperature equivalent to that of the liquid heat storage medium 2 in the heat storage stage in the first cavity 11, or even higher, to ensure that more heat is transferred within a shorter distance. Of course, while the second heating module 6 supplements the heat of the liquid heat storage medium 2, the contact relationship between the second heating module 6 and the heat exchange module 5 can be adjusted, so that while the second heating module 6 supplements the heat of the liquid heat storage medium 2, a certain heating effect can be indirectly applied to the live water in the water outlet pipe 4, so that the heating effect of the live water within a shorter distance can be further ensured, thereby improving the stability and continuity of the live water heating.

[0062] When the second heating module 6 is arranged in the third pipe section, after the liquid heat storage medium 2 in the heat storage stage in the first cavity 11 flows to the second cavity 12, when hot water needs to be used continuously, the liquid heat storage medium 2 flows back from the second cavity 12 to the first cavity 11, and when the liquid heat storage medium 2 flows through the third pipe section, the second heating module 6 starts to work to supplement the heat for the liquid heat storage medium 2 flowing through the third pipe section. After the supplementary heat is completed, the liquid heat storage medium 2 flows into the second pipe section located in the heat exchange module 5 again to complete the heat release, that is, to complete the heating of the live water. Compared with the second heating module 6 arranged in the first pipe section and the second pipe section, the second heating module 6 arranged in the third pipe section can In the process of the liquid heat storage medium 2 flowing back from the second cavity 12 to the first cavity 11, the liquid heat storage medium 2 is supplemented with heat before it flows into the second pipe section. The second heating module 6 plays a greater role. Compared with the second heating module 6 arranged in the second pipe section, it is necessary to increase the heating efficiency of the second heating module 6 to cope with the possible influence of shortening the heat exchange distance of live water heating. The second heating module 6 is arranged in the third pipe section before the liquid heat storage medium 2 performs heat exchange, that is, the liquid heat storage medium 2 is supplemented with heat, thereby reducing the requirements for the second heating module 6 and greatly improving the temperature stability and use continuity of live water heating.

[0063] When the second heating module 6 is disposed in the second cavity 12, the specific working principle is as follows:

[0064] When it is necessary to continue to heat the running water, the liquid heat storage medium 2 in the first cavity 11 flows to the second cavity 12 through the circulation pipe 3. After the liquid heat storage medium 2 after absorbing heat flows into the second cavity 12, the second heating module 6 starts to work to supplement the heat of the liquid heat storage medium 2 after absorbing heat. Since the consumption rate of the liquid heat storage medium 2 in the first cavity 11 requires a certain amount of time, and the liquid heat storage medium 2 gradually flows into the second cavity 12, the second heating module 6 can slowly heat the liquid heat storage medium 2 in the second cavity 12. All the liquid in the first cavity 11 The heat storage medium 2 flows into the second cavity 12 to complete the heat supplement. At this time, the second cavity 12 contains liquid heat storage medium 2 that meets the required temperature for heating the live water. The water pump 7 is reversed to pump the liquid heat storage medium 2 in the second cavity 12 into the first cavity 11. The live water heating is completed during the pumping process, that is, when the liquid heat storage medium 2 in the first cavity 11 is used, the liquid heat storage medium 2 in the second cavity 12 is heated. The first cavity 11 and the second cavity 12 are converted to each other and recycled, which greatly improves the temperature stability and sustainability of live water heating.

[0065] In order to better control the start and stop of the first heating module 13 , the first heating module 13 is electrically connected to a first temperature sensor 14 for controlling the operation of the first heating module 13 .

[0066] Specifically, the following will be described in detail with the first heating module 13 being disposed in the first cavity 11:

[0067] The first temperature sensor 14 has a temperature monitoring point, and the temperature monitoring point of the first temperature sensor 14 can be set in the first cavity 11, the second cavity 12, the circulation pipe 3 or the water outlet pipe 4. When the temperature monitoring point of the first temperature sensor 14 is set in the first cavity 11, the temperature of the liquid heat storage medium 2 in the first cavity 11 is monitored, so as to control the first heating module 13 to accurately heat the liquid heat storage medium 2, thereby achieving the accuracy of the outlet water temperature of the live water heating. When the temperature monitoring point of the first temperature sensor 14 is set in the second cavity 12, the temperature of the liquid heat storage medium 2 in the first cavity 11 can be inferred by monitoring the temperature of the liquid heat storage medium 2 flowing into the second cavity 12 and the temperature of the live water in the water outlet pipe 4 determined by the seasonal temperature, so as to correct the heating of the first heating module 13. When the temperature monitoring point of the first temperature sensor 14 is set in the circulation pipe 3, the temperature monitoring point of the first temperature sensor 14 can monitor the temperature of the liquid heat storage medium 2 in the circulation pipe 3 before, during or after the heat exchange, which is equivalent to monitoring the temperature of the liquid heat storage medium 2 in the first cavity 11, and adjusting the operation of the first heating module 13 based on the monitored temperature. The temperature of the liquid heat storage medium 2 during heat exchange at the temperature monitoring point of the first temperature sensor 14 can be calculated based on the position of the temperature monitoring point of the first temperature sensor 14 in the heat exchange module 5, and the distance from the beginning of the heat exchange can be calculated based on the value and the temperature of the running water, and the operation of the first heating module 13 can be adjusted based on the calculated data. The temperature monitoring point of the first temperature sensor 14 monitors the temperature of the liquid heat storage medium 2 after the heat exchange, which is equivalent to monitoring the temperature of the liquid heat storage medium 2 in the second cavity 12, which will not be repeated here. When the temperature monitoring point of the first temperature sensor 14 is set at the outlet pipe 4, it is mainly used to monitor the temperature of the pipe section after the outlet pipe 4 is heated, so as to judge whether the temperature of the live water heating meets the standard, thereby adjusting the operation of the first heating module 13. The above-mentioned first temperature sensor 14 is convenient for monitoring the temperature of the liquid heat storage medium 2 in the first cavity 11, the second cavity 12, the circulation pipe 3 or the outlet pipe 4, so as to facilitate the control of the operation of the heating module.

[0068] It should be noted that if the first heating module 13 is disposed in the second cavity 12 , the working principle of adjusting the operation of the first heating module 13 based on the first temperature sensor 14 can be derived similarly based on the above, which will not be elaborated here.

[0069] Furthermore, in order to facilitate the control of the operation of the second heating module 6 , the second heating module 6 is electrically connected to a second temperature sensor 15 for controlling the operation of the second heating module 6 .

[0070] Specifically, the second temperature sensor 15 has a temperature monitoring point, and the temperature monitoring point of the second temperature sensor 15 can be set in the first cavity 11, the second cavity 12, the circulation pipe 3 or the water outlet pipe 4 as needed. In this embodiment, it is best to set the second temperature sensor 15 in the second cavity 12 or the circulation pipe 3 in the pipeline close to the second cavity 12. By monitoring the temperature of the liquid heat storage medium 2 in the second cavity 12, the operation, working time and working power of the second heating module 6 are adjusted. Based on the above adjustment, when the liquid heat storage medium 2 refluxes in the second cavity 12, the heating demand that meets the preset conditions is achieved.

[0071] In practical applications, there are two main ways to arrange the circulation pipe 3 and the water outlet pipe 4 through the heat exchange module 5:

[0072] The first method is to arrange the circulation pipe 3 and the water outlet pipe 4 in parallel through the heat exchange module 5. This arrangement is more convenient in the design and assembly process, and the circulation pipe 3 and the water outlet pipe 4 can be relatively simply passed through the heat exchange module 5 to achieve heat transfer and hot water supply.

[0073] The second method is to bend the circulation pipe 3 and / or the outlet pipe 4. Specifically, the bend setting mainly includes a bending setting and a coiling setting. By bending the circulation pipe 3 or the outlet pipe 4, the path length in the heat exchange module 5 can be increased, thereby improving the heat exchange effect. This setting method can make the hot water stay in the circulation pipe 3 or the outlet pipe 4 for a longer time, and perform more sufficient heat exchange with the heat exchange medium, thereby improving the temperature and stability of the hot water.

[0074] The benefit of using a curved or coiled setting is that it can make full use of space and minimize the overall size of the water heater. By cleverly designing the path of the pipe, a larger heat exchange area can be achieved in a limited space, improving heat exchange efficiency while reducing heat loss. This design can also increase the strength and stability of the pipe, allowing it to withstand the pressure and flow of the internal fluid.

[0075] The electric water heater of the utility model further comprises a housing 1, and a first cavity 11 and a second cavity 12 are arranged inside the housing 1. The arrangement of the housing 1 facilitates the installation of the first cavity 11 and the second cavity 12, and is also helpful for the design of the circulation pipe 3, the water pump 7 and the heat exchange module 5. The housing 1 can be provided with an insulation layer as required to improve the insulation effect in the first cavity 11 and the second cavity 12, reduce heat loss, and thus improve the stability of the outlet water temperature of the live water heating.

[0076] In addition, as an optional solution, the first cavity 11 is arranged in the second cavity 12, or the second cavity 12 is arranged in the first cavity 11, that is, the second cavity 12 encloses the first cavity 11, or the first cavity 11 includes the second cavity 12. The above structural setting is mainly considered as follows: due to the insulation technology applied to the field of water heaters, there is still more or less heat dissipated to the outside of the heater, thereby causing inevitable heat loss. The above structural setting can ensure that the heat dissipated by the wrapped cavity is preferentially absorbed by the external cavity.

[0077] Furthermore, since the first cavity 11 is the main heating cavity and the second cavity 12 is an auxiliary cavity, the temperature of the liquid heat storage medium 2 in the second cavity 12 is often lower than the liquid heat storage medium 2 in the first cavity 11, so the first cavity 11 with a higher temperature is arranged in the second cavity 12, and the first cavity 11 is provided with an insulation layer. It is still impossible to avoid that the lost heat will be transferred to the second cavity 12. Since the temperature difference between the first cavity 11 and the second cavity 12 is smaller than the temperature difference between the first cavity 11 and the air outside the electric water heater, the heat is dissipated slowly, which can effectively reduce the heat loss of the first cavity 11. Similarly, compared with the temperature difference between the first cavity 11 and the air outside the electric water heater, the temperature difference between the second cavity 12 and the air outside the electric water heater is smaller. The second cavity 12 is arranged to wrap the first cavity 11, and the heat lost in the second cavity 12 is less than when the first cavity 11 and the second cavity 12 are arranged side by side, thereby greatly reducing the overall heat loss of the electric water heater.

[0078] In some embodiments, the first cavity 11 and / or the second cavity 12 is also connected to a liquid replenishment tube 41 for replenishing the loss of the liquid heat storage medium 2. With the loss during use, the total amount of the liquid heat storage medium 2 will gradually decrease. Replenishment through the liquid replenishment tube 41 can ensure that the total amount of the liquid heat storage medium 2 in the first cavity 11 and the second cavity 12 can always store enough heat to meet the use requirements, wherein the liquid replenishment tube 41 is arranged in the second cavity 12 for the best, because the liquid heat storage medium 2 in the first cavity 11 is the first part to be used, therefore, directly filling the liquid heat storage medium 2 into the second cavity 12 will not affect the temperature of the liquid heat storage medium 2 in the first cavity 11.

[0079] In this embodiment, the water outlet pipe 4 is provided with a branch pipe, which is a liquid replenishment pipe 41, and the liquid replenishment pipe 41 connects the water outlet pipe 4 and the second cavity 12. When the branch pipe of the water outlet pipe 4 is used as the liquid replenishment pipe 41, the liquid heat storage medium 2 in the first cavity 11 and the second cavity 12 needs to be water, so that the water outlet pipe 4 can directly replenish the liquid heat storage medium 2 in the second cavity 12. The above structure saves design space by setting a branch pipe at the water outlet pipe 4 as the liquid replenishment pipe 41 to replenish the second cavity 12. Water can be used for replenishment. Correspondingly, a switch solenoid valve 42 can be set at the branch pipe to automatically open and close to replenish the liquid heat storage medium 2, 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 2 inside the first cavity 11 and the second cavity 12 for automatic monitoring, or a transparent tube using the principle of a communicating vessel can be provided on one side of the first cavity 11. When the liquid heat storage medium 2 is in the first cavity 11 during the heat storage stage, the liquid level of the liquid heat storage medium 2 in the first cavity 11 can be observed by observing the liquid level in the transparent tube.

[0080] It should be noted that the liquid heat storage medium 2 replenished by the liquid replenishing pipe 41 is limited, so even if some liquid heat storage medium 2 is added, the impurities contained in the newly added liquid heat storage medium 2 are also limited, and no scale that affects the normal operation of the water heater will be generated.

[0081] In this embodiment, a pressure relief valve 16 is further provided at the top of the first cavity 11 and / or the second cavity 12 to adjust the pressure inside the first cavity 11 and the second cavity 12. Since the liquid heat storage medium 2 may be vaporized when heated, the excessive pressure can be safely released through the pressure relief valve 16, thereby improving the safety of the electric water heater.

[0082] In this embodiment, the heat exchange module 5 uses an efficient plate heat exchanger 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. Other efficient and durable heat exchangers can also be used to undertake the heat exchange work.

[0083] 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 double-barrel running water electric water heater, characterized in that: include: a first cavity; A second cavity; a circulation pipe, the circulation pipe communicating the first cavity with the second cavity, the circulation pipe being provided with a water pump; A liquid heat storage medium, the liquid heat storage medium flows back and forth in the first cavity, the circulation pipe and the second cavity in sequence; A first heating module, the first heating module is arranged in the first cavity or the second cavity or on the circulation pipe, and the first heating module is used to heat the liquid heat storage medium; Outlet pipe; A heat exchange module, wherein the circulation pipe and the water outlet pipe exchange heat through the heat exchange module.

2. A double-barrel running water type electric water heater according to claim 1, characterized in that: It also includes a second heating module. The first heating module is arranged in the first cavity, and the second heating module is arranged in the pipe section of the circulation pipe close to the second cavity and / or in the second cavity.

3. A double-barrel running water type electric water heater according to claim 1, characterized in that: The first heating module is electrically connected to a first temperature sensor for controlling the operation of the first heating module.

4. A double-barrel running water type electric water heater according to claim 2, characterized in that: The second heating module is electrically connected to a second temperature sensor for controlling the operation of the second heating module.

5. A double-barrel running water type electric water heater according to claim 1, characterized in that: The circulation pipe and the water outlet pipe are arranged parallel to each other and pass through the heat exchange module.

6. A double-barrel running water type electric water heater according to claim 1, characterized in that: The circulation pipe passes through the heat exchange module portion and is arranged in a winding manner, and / or the water outlet pipe passes through the heat exchange module portion and is arranged in a winding manner.

7. A double-barrel running water type electric water heater according to any one of claims 1 to 6, characterized in that: It also includes a shell, and the first cavity and the second cavity are arranged inside the shell.

8. A double-barrel running water type electric water heater according to any one of claims 1 to 6, characterized in that: The first cavity and / or the second cavity is connected to a fluid infusion tube.

9. A double-barrel 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 infusion pipe, and the liquid infusion pipe connects the water outlet pipe and the second cavity.

10. A double-barrel running water type electric water heater according to any one of claims 1 to 6, characterized in that: The first cavity and / or the second cavity is provided with a pressure relief valve.

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