Double-barrel preheating running water type electric water heater

Abstract

The utility model discloses a double-barrel preheating 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, the first cavity is communicated with the second cavity, the circulating pipe is provided with a water pump, the liquid heat storage medium circulates in the first cavity, the second cavity and the circulating pipe, and the first heating module is communicated with the water outlet pipe. The first heating module is arranged in the first cavity and / or the second cavity and / or on the circulating pipe, the water outlet pipe passes through the first cavity, or the water outlet pipe passes through the second cavity, and the circulating pipe and the water outlet pipe exchange heat through the heat exchange module. The liquid heat storage medium only circulates in the first cavity, the second cavity and the circulating pipe, excessive impurities cannot be generated, the liquid heat storage medium unidirectionally flows in the cavities and the circulating pipe of the electric water heater through the circulating pipe and the water pump in the using process, and it is ensured that the water outlet temperature is stable. The liquid heat storage medium absorbs heat and is stored during flowing, the water outlet pipe is preheated through the cavity, and the heating effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water heaters, in particular to a double-barrel preheating live 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 preheating 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 preheating live 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, the circulation pipe and the second cavity in sequence;

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

[0014] a water outlet pipe, the water outlet pipe being arranged through the first cavity to exchange heat with the first cavity, or the water outlet pipe being arranged through the second cavity to exchange heat with the second cavity;

[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. The liquid heat storage medium works in coordination with the water pump through the circulation pipe, and the liquid heat storage medium flows back and forth or circulates in the first cavity, the circulation pipe and the second cavity of the electric water heater in turn, and almost no impurities are generated, and there will be no problem of excessive scale, so as not to affect the use of the electric water heater. The liquid heat storage medium operates in a unidirectional flow mode during use, that is, it flows from one cavity to another cavity (it can be 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 absorbing heat will be stored in another cavity. Therefore, as a cavity that flows out the high-temperature liquid heat storage medium, the high-temperature liquid heat storage medium therein will not be affected by the low-temperature liquid heat storage medium and cool down, thereby ensuring the stability of the final water outlet temperature of the water outlet pipe. In addition, the water outlet pipe is arranged through the first cavity or the second cavity, so that the live water of the water outlet pipe can be preheated before flowing to the heat exchange module, thereby improving the effect of heating the live water.

[0017] Furthermore, the water outlet pipe is disposed through the first cavity or through the second cavity.

[0018] By adopting the above solution, the water outlet pipe is arranged to pass through the first cavity or the second cavity to improve the preheating effect.

[0019] 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 on the water outlet pipe.

[0020] By adopting the above solution, the second heating module is arranged on the water outlet pipe, and supplementary heating can be performed before water flows out of the water outlet pipe, thereby ensuring the temperature requirement of live water heating and improving the temperature stability and heating continuity of live water heating.

[0021] Furthermore, the second heating module is electrically connected to a second temperature sensor for controlling the operation of the second heating module.

[0022] By adopting the above scheme, a second temperature sensor is set to monitor the temperature of the circulation pipe, the water outlet pipe or the heat exchange module and adjust the working state of the second heating module accordingly. The temperature information of these positions can be obtained in real time through the second temperature sensor to determine whether it is necessary to start the second heating module, adjust the heating power of the second heating module and control the heating time. In this way, the heating process of the system can be effectively controlled to meet the required temperature requirements.

[0023] Furthermore, the first heating module is electrically connected to a first temperature sensor for controlling the operation of the first heating module.

[0024] By adopting the above scheme, a 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 and control the operation of the first heating module, thereby ensuring real-time monitoring of the temperature of the liquid heat storage medium and adjusting the operation of the first heating module accordingly.

[0025] Furthermore, the water outlet pipe includes a water inlet section, a heating section and a water outlet section, the heating section is a pipe that contacts the heat exchange module for heat exchange, the section of the water outlet pipe located upstream of the heating section is the water inlet section, the section of the water outlet pipe located downstream of the heating section is the water outlet section, and the water inlet section is arranged through the second cavity.

[0026] By adopting the above scheme, the water inlet section is arranged through the second cavity, and the water inlet section is the pipe section of the unheated part. The water inlet section can be preliminarily heated when passing through the second cavity, that is, preheated, so that the heating effect of the living water can be improved. In addition, the water inlet section is arranged through the second cavity. Compared with the arrangement of passing through the first cavity, the second cavity is the liquid heat storage medium after heat absorption. The water outlet pipe is preheated in the second cavity, which will not affect the temperature of the liquid heat storage medium in the first cavity, thereby ensuring the heating effect of the living water.

[0027] Furthermore, the circulation pipe and the water outlet pipe are arranged parallel to and pass through the heat exchange module.

[0028] By adopting the above solution, the installation of the circulation pipe and the water outlet pipe on the heat exchange module is facilitated.

[0029] 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.

[0030] 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.

[0031] Furthermore, the circulation pipe is provided with a heating pipe.

[0032] By adopting the above scheme, a heating pipe is arranged on the circulation pipe to facilitate heating of the circulation pipe, which has a certain heating effect, thereby improving the effect of heating the live water in the outlet pipe and ensuring the stability of the outlet water temperature.

[0033] 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.

[0034] 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.

[0035] In summary, the double-barrel preheating live water type electric water heater provided by the utility model has the following technical effects:

[0036] 1. Liquid heat storage medium circulation: The first heating module in the electric water heater is used to heat the liquid heat storage medium. The liquid heat storage medium forms a circulation flow between the first cavity, the second cavity and the circulation pipe through the cooperation of the circulation pipe and the water pump. This design ensures that only the liquid heat storage medium circulates in the electric water heater, and almost no impurities are generated. Therefore, the scale can be greatly reduced during the use of the electric water heater, thereby solving the problem caused by excessive scale.

[0037] 2. Temperature stability and unidirectional flow of live water heating: The liquid heat storage medium operates in a unidirectional flow mode during use, flowing from one cavity to another (it can be the first cavity to the second cavity, or the second cavity to the first cavity). This flow mode ensures that the heat-absorbed liquid heat storage medium will be stored in another cavity and will not flow back to the original cavity. Therefore, the medium in the cavity that flows out of the liquid heat storage medium will not be affected by the heat-absorbed medium and cooled down, thereby ensuring the final water outlet temperature of the outlet pipe is stable.

[0038] 3. Preheating effect and increase in live water temperature: The water outlet pipe passes through the first cavity or the second cavity, so that the live water is preheated before entering the heat exchange module. This design can use the liquid heat storage medium in the first cavity or the second cavity to preheat the live water, thereby ensuring the heating effect of the live water in the heat exchange module. Through preheating, the temperature of the live water can reach the required set temperature in a shorter time, providing a more efficient hot water supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of the state in which the water outlet pipe of the double-barrel live water type electric water heater of the utility model passes through the second cavity;

[0040] Figure 2 It is a schematic structural diagram of the state in which the water outlet pipe of the double-barrel live water type electric water heater of the present utility model passes through the first cavity.

[0041] Among them, the meanings of the figure numbers are as follows: 11. first cavity; 12. second cavity; 13. first heating module; 14. first temperature sensor; 16. pressure relief valve; 2. liquid heat storage medium; 3. circulation pipe; 4. water outlet pipe; 41. water inlet section; 42. heating section; 43. water outlet section; 44. liquid replenishment pipe; 45. switch solenoid valve; 5. heat exchange module; 6. second heating module; 61. second temperature sensor; 7. water pump. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See also Figure 1-Figure 2As shown, the utility model discloses a double-barrel preheating 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, wherein 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 reciprocates in the first cavity 11, the circulation pipe 3 and the second cavity 12 in sequence, and the first heating module 13 is arranged in the first cavity 11 and / or in the second cavity 12 and / or on the circulation pipe 3. The first heating module 13 is used to heat the liquid heat storage medium 2, and the water outlet pipe 4 is arranged through the first cavity 11 or through the second cavity 12. The circulation pipe 3 and the water outlet pipe 4 exchange heat through the heat exchange module 5.

[0047] Specifically, the first cavity 11 and the second cavity 12 in the electric water heater are connected through the circulation pipe 3, and the liquid heat storage medium 2 circulates back and forth in the first cavity 11, the circulation pipe 3 and the second cavity 12 in turn. It is best to use a two-way water pump 7 as the water pump 7. Through the two-way water pump 7 installed on the circulation pipe 3, the liquid heat storage medium 2 can be transmitted between the first cavity 11 and the second cavity 12. This design realizes the circulation of the liquid heat storage medium 2. The circulation pipe 3 and the water outlet pipe 4 exchange heat through the heat exchange module 5. The common implementation method is to use a structure and material with a high thermal conductivity, such as a plate heat exchanger. Such a design ensures efficient heat transfer, so that the water can be quickly heated when passing through the heat exchange module 5. The first heating module 13 is usually located in the first cavity 11 and is used to heat the liquid heat storage medium 2. The water outlet pipe 4 is set through the first cavity 11 or the second cavity 12, so that the live water can be preheated before entering the heat exchange module 5, thereby improving the overall heating effect. Such a pre-heating design enables the live water to reach the set temperature more quickly, providing a more efficient hot water supply.

[0048] The above will take the working principle of the case where the first heating module 13 is disposed in the first cavity 11 as an example to illustrate:

[0049] 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 the heat storage work. If part or all of the liquid heat storage medium 2 is located in the second cavity 12, the liquid heat storage medium 2 is pumped to the first cavity 11 first, and the liquid heat storage medium 2 is concentrated in the first cavity 11. The first heating module 13 heats the concentrated liquid heat storage medium 2 to ensure the effective implementation of the heat storage process.

[0050] 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 live 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. Before the liquid heat storage medium 2 flows through the heat exchange module 5, when the water outlet pipe 4 is set through the first cavity 11, the liquid heat storage medium 2 in the first cavity 11 will transfer part of the heat to the running water flowing in the water outlet pipe 4 when the water outlet pipe 4 flows through the first cavity 11, and preheat the running water in the part of the water outlet pipe 4 flowing through the first cavity 11, which is convenient for subsequent heating. When the water outlet pipe 4 is set through the second cavity 12, as the first cavity 11 continues to pump the liquid heat storage medium 2 to the second cavity 12, when the water outlet pipe 4 flows through the second cavity 12, the liquid heat storage medium 2 in the second cavity 12 will transfer part of the heat to the running water flowing in the water outlet pipe 4, thereby completing the preheating of the running water in the water outlet pipe 4. The user can set the water outlet pipe 4 to pass through the first cavity 11 or the second cavity 12 according to the needs. If the water outlet pipe 4 is set to pass through the first cavity 11, the temperature of the liquid heat storage medium 2 in the first cavity 11 is better, and the preheating effect is better. In addition, the water outlet pipe 4 is set to pass through the first cavity 11, and the heat of the liquid heat storage medium 2 in the first cavity 11 is indirectly transferred to the running water in the water outlet pipe 4. The total amount of heat in the liquid heat storage medium 2 used to heat the running water remains unchanged, and the amount and speed of the running water flow can be adjusted by the controller to achieve the effect of stabilizing the outlet water temperature. If the water outlet pipe 4 is set to pass through the second cavity 12, since the second cavity 12 contains the liquid heat storage medium 2 that has been heated by the first round, the water outlet pipe 4 is set to pass through the second cavity 12, and indirectly absorbs the heat of the liquid heat storage medium 2 in the second cavity 12, which will not affect the temperature of the liquid heat storage medium 2 in the first cavity 11, thereby ensuring the heating effect.

[0051] The daily use process is: give priority to the heat storage stage, and it is best to use hot water after the heat storage is completed. Open the valve of the water outlet pipe 4, and the water in the water outlet pipe 4 begins to flow. When the water outlet pipe 4 passes through the first cavity 11, the water outlet pipe 4 is preheated when flowing through the first cavity 11. At the same time, turn on the water pump 7, and the water pump 7 pumps the liquid heat storage medium 2 in the first cavity 11 into the second cavity 12. The live water in the water outlet pipe 4 is heated during the flow of the liquid heat storage medium 2 and the water outlet pipe 4. The liquid heat storage medium 2 that absorbs heat during the flow process is stored in the second cavity 12. Therefore, the liquid heat storage medium 2 in the cavity that flows out the liquid heat storage medium 2 will not be affected by the liquid heat storage medium 2 that absorbs heat and cools down, thereby ensuring the stability of the final water outlet temperature of the water outlet pipe 4. When the water outlet pipe 4 passes through the second cavity 12, there is liquid heat storage medium 2 flowing into the second cavity 12, and the water outlet pipe 4 is affected by the liquid heat storage medium 2 in the second cavity 12 to complete preheating. 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:

[0052] 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.

[0053] 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.

[0054] 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.

[0055] It should be noted that the water outlet pipe 4 is arranged through the first cavity 11 or the second cavity 12, mainly including the water outlet pipe 4 being arranged in contact with the first cavity 11 or the second cavity 12 to achieve the preheating effect, or the water outlet pipe 4 is arranged through the first cavity 11 or the second cavity 12 to achieve the preheating effect, and the first cavity 11 and the second cavity 12 can set the volume 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 of the first heating module 13 for 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] As an optional embodiment, the first heating module 13 can also be arranged on the circulation pipe 3. When only the first heating module 13 is arranged on the circulation pipe 3 to heat the liquid heat storage medium 2, the liquid heat storage medium 2 is heated when passing through the circulation pipe 3 covered by the first heating module 13. Other specific heat exchange processes and usage scenarios are the same as the above working principles and will not be elaborated here.

[0057] In some embodiments, in order to improve the preheating effect of the water outlet pipe 4, the water outlet pipe 4 is arranged through the first cavity 11 or through the second cavity 12, thereby increasing the contact area between the water outlet pipe 4 and the liquid heat storage medium 2, and the water outlet pipe 4 directly contacts the liquid heat storage medium 2, further improving the heat conduction effect.

[0058] In this embodiment, the water inlet section 41 is arranged to pass through the second cavity 12. When the water inlet section 41 is arranged to pass through the second cavity 12, the water inlet section 41 is a pipe section of the unheated part. The water inlet section 41 can be preliminarily heated when passing through the second cavity 12, that is, preheated, so that the heating effect of the living water can be improved. In addition, the water inlet section 41 is arranged to pass through the second cavity 12. Compared with the arrangement of passing through the first cavity 11, the second cavity 12 is the liquid heat storage medium 2 after heat absorption. The water outlet pipe 4 is preheated in the second cavity 12, which will not affect the temperature of the liquid heat storage medium 2 in the first cavity 11, thereby ensuring the heating effect of the living water.

[0059] 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 on the water outlet pipe 4 .

[0060] Specifically, the first heating module 13 is arranged in the first cavity 11, and the second heating module 6 is arranged on the water outlet pipe 4. The water outlet pipe 4 includes an inlet section 41, a heating section 42 and a water outlet section 43. The heating section 42 is a pipe that contacts the heat exchange module 5 for heat exchange. The section of the water outlet pipe 4 located upstream of the heating section 42 is the water inlet section 41, and the section of the water outlet pipe 4 located downstream of the heating section 42 is the water outlet section 43. The upstream and downstream are divided according to the direction of water flow. Here, the heating section 42 of the water outlet pipe 4 located in the heat exchange module 5 is used as the boundary. According to the direction of water flow, the upstream is the part from the water inflow of the water outlet pipe 4 to the heating section 42, and the downstream is the part from the heating section 42 to the part from the water outflow of the water outlet pipe 4. The second heating module 6 is divided into three settings based on the water inlet section 41, the heating section 42 and the water outlet section 43 of the water outlet pipe 4:

[0061] When the second heating module 6 is arranged at the water inlet section 41, it is mainly used when the liquid heat storage medium 2 cannot provide heating that meets the demand for the water outlet pipe 4. The second heating module 6 heats the water inlet section 41, and heats the live water in the water outlet pipe 4 until the liquid heat storage medium 2 that has subsequently absorbed heat can also be heated to the required temperature, thereby improving the stability and continuity of the water outlet temperature.

[0062] When the second heating module 6 is arranged in the heating section 42, while the outlet pipe 4 is heated by the heat exchange module 5, the second heating module 6 supplements the heating of the living water in the outlet pipe 4 based on the heating condition of the heat exchange module 5, so as to achieve the stability of the heating temperature of the living water and the heating continuity effect.

[0063] When the second heating module 6 is arranged at the water outlet section 43, after the live water in the water outlet pipe 4 is heated by the heat exchange module 5, the second heating module 6 performs targeted supplementary heat on the live water that does not meet the temperature requirement, thereby improving the stability and sustainability of the live water heating.

[0064] 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 .

[0065] Specifically, the following will be described in detail with the first heating module 13 being disposed in the first cavity 11:

[0066] 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.

[0067] 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.

[0068] In order to better control the start and stop of the first heating module 13, the first heating module 13 is electrically connected to the first temperature sensor 14, so as to control the operation of the first heating module 13 in combination with the monitored temperature. The following will describe in detail the situation where the first heating module 13 is arranged in the first cavity 11:

[0069] 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. If 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 to accurately control the heating of the liquid heat storage medium 2 by the first heating module 13, thereby achieving accurate heating control of the hot water. If 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 calculated by monitoring the temperature of the liquid heat storage medium 2 flowing into the second cavity 12 and judging the temperature of the hot water in the water outlet pipe 4 according to the seasonal temperature, thereby correcting the heating process 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.

[0070] By setting the temperature monitoring point of the first temperature sensor 14 in the first cavity 11, the second cavity 12, the circulation pipe 3 or the water outlet pipe 4, the temperature of the liquid heat storage medium 2 can be conveniently monitored, thereby facilitating the control of the operation of the heating module. It should be noted that if the first heating module 13 is provided in the second cavity 12, the first temperature sensor 14 can be set according to a similar principle to adjust the operation of the first heating module 13, which will not be repeated here.

[0071] Furthermore, in order to conveniently control the operation of the second heating module 6 , the second heating module 6 is electrically connected to a second temperature sensor 61 for controlling the operation of the second heating module 6 .

[0072] Specifically, the second temperature sensor 61 has a temperature monitoring point, and the temperature monitoring point of the second temperature sensor 61 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 the present embodiment, it is best to set the second temperature sensor 61 in the pipeline of the water outlet pipe 4. By monitoring the temperature of the live water in the water outlet pipe 4, the operation, working time and working power of the second heating module 6 are adjusted. Based on the above adjustment, the liquid heat storage medium 2 that does not meet the temperature requirements is used to supplement heat when executing the live water heating instruction, so as to meet the heating requirements that meet the preset conditions.

[0073] In practical applications, the arrangement of the circulation pipe 3 and the water outlet pipe 4 passing through the heat exchange module 5 can be mainly divided into two types:

[0074] Parallel through arrangement: This arrangement is relatively simple, and the circulation pipe 3 and the water outlet pipe 4 are arranged to pass through the heat exchange module 5 in parallel. This design allows the circulation pipe 3 and the water outlet pipe 4 to pass through the heat exchange module 5 relatively easily during the assembly process.

[0075] Bending setting: The bending setting includes two setting modes: bending setting and coiling setting. This setting mode includes bending or coiling the circulation pipe 3 and / or the outlet pipe 4. By bending or coiling 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 design allows the hot water to stay in the circulation pipe 3 or the outlet pipe 4 for a longer time, and to have a more complete heat exchange with the heat exchange medium, thereby improving the temperature and stability of the hot water.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] In some embodiments, the circulation pipe 3 is provided with a heating pipe, which is used to heat the circulation pipe 3, thereby indirectly heating the liquid heat storage medium 2 flowing in the circulation pipe 3. In the above structure, the heating pipe is arranged on the circulation pipe 3 to facilitate the heating of the circulation pipe 3, and has a certain heat supplement effect, thereby improving the effect of heating the live water in the water outlet pipe 4 and ensuring its outlet water temperature is stable.

[0080] In some embodiments, the first cavity 11 or the second cavity 12 is also connected to a liquid replenishment tube 44 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 44 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 44 is preferably arranged in the second cavity 12, 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.

[0081] In this embodiment, the water outlet pipe 4 is provided with a branch pipe, which is a liquid replenishment pipe 44, and the liquid replenishment pipe 44 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 44, the liquid heat storage medium 2 in the first cavity 11 and the second cavity 12 needs to be water, so that the condition that the water outlet pipe 4 directly replenishes the liquid heat storage medium 2 in the second cavity 12 can be met. The above structure saves design space by setting a branch pipe at the water outlet pipe 4 as the liquid replenishment pipe 44 to replenish the second cavity 12, and water can be used for replenishment. Correspondingly, a switch solenoid valve 45 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 liquid 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.

[0082] It should be noted that the liquid heat storage medium 2 replenished by the liquid replenishing pipe 44 is limited. Therefore, 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.

[0083] 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.

[0084] 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.

[0085] 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 preheating live water electric water heater, characterized in that: include: a first cavity; a second cavity; a circulation pipe, the circulation pipe communicating with the first cavity and the second cavity, the circulation pipe being provided with a water pump; a liquid heat storage medium, the liquid heat storage medium sequentially flowing back and forth in the first cavity, the circulation pipe, and the second cavity; a first heating module, the first heating module being disposed in the first cavity, and / or in the second cavity, and / or on the circulation pipe, the first heating module being used to heat the liquid heat storage medium; a water outlet pipe, the water outlet pipe being disposed through the first cavity for exchanging heat with the first cavity, or the water outlet pipe being disposed through the second cavity for exchanging heat with the second cavity; A heat exchange module is used for heat exchange between the circulation pipe and the water outlet pipe.

2. A double-barrel preheating running water type electric water heater according to claim 1, characterized in that: The water outlet pipe is arranged through the first cavity or through the second cavity.

3. A double-barrel preheating live 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 on the water outlet pipe.

4. A double-barrel preheating running water type electric water heater according to claim 3, 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 preheating live 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.

6. A double-barrel preheating running water type electric water heater according to any one of claims 1 to 5, characterized in that: The water outlet pipe includes a water inlet section, a heating section and a water outlet section. The heating section is a pipe that contacts the heat exchange module for heat exchange. The section of the water outlet pipe located upstream of the heating section is the water inlet section, and the section of the water outlet pipe located downstream of the heating section is the water outlet section. The water inlet section is arranged through the second cavity.

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

8. A double-barrel preheating running water type electric water heater according to any one of claims 1 to 5, characterized in that: The circulation pipe passes through the heat exchange module and is arranged in a winding manner, and / or the water outlet pipe passes through the heat exchange module and is arranged in a winding manner.

9. A double-barrel preheating running water type electric water heater according to any one of claims 1 to 5, characterized in that: The circulation pipe is provided with a heating pipe.

10. A double-barrel preheating running water type electric water heater according to any one of claims 1 to 5, characterized in that: The water outlet pipe is provided with a branch pipe, which is a liquid infusion pipe. The liquid infusion pipe connects the water outlet pipe and the second cavity.

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