Long-time running water washing phase change type electric water heater

Abstract

The utility model discloses a long-time running water washing phase change type electric water heater which comprises a box body, a water using pipe, a heating module, a heat exchange area and a heat storage area. A heat exchange medium is arranged in the heat exchange area, the water pipe penetrates through the heat exchange area, and water flow in the water pipe exchanges heat with the heat exchange medium in the heat exchange area; the heat storage area comprises at least two heat storage units, the heat storage units are mutually independent and arranged in parallel, heat storage phase change materials are arranged in the heat storage units respectively, and heat exchange media in the heat exchange area enter the heat storage units and exchange heat with the heat storage phase change materials in the heat storage units. According to the phase change type electric water heater, the heat exchange area and the heat storage area which are independent are arranged, so that heat storage operation can be carried out in the water using process. According to the phase change type electric water heater, the heat storage area is arranged to be a plurality of independent heat storage units capable of independently exchanging heat with the heat exchanger, so that the time required for heat storage of the heat storage area is shortened, and the phase change type electric water heater can quickly perform water using work.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water heaters, in particular to a long-time live water washing phase-change electric water heater. Background Art

[0002] Electric water heaters mainly convert electrical energy into the internal energy of water. Under the premise of ensuring the safety of electricity use, electric water heaters have many advantages: high safety, simple and convenient water pipe laying, precise temperature adjustment, low maintenance cost, environmentally friendly and no exhaust gas generation, no environmental dependence on installation, etc. Based on these advantages, in recent years, despite the emergence of a variety of water heater options on the market, electric water heaters still maintain a large market share. Moreover, as people's pursuit of quality of life continues to improve, the requirements for the performance and functions of water heaters are also constantly upgrading.

[0003] In the prior art, electric water heaters are mainly divided into water storage type and instant type. Instant water heaters are accepted by people for their advantages such as small size, no need to store water for a long time, less waste water, etc. However, because instant water heaters directly heat water instantly through electrical energy, they require high power and correspondingly high energy consumption. To solve this problem, phase change electric water heaters were proposed.

[0004] Phase change electric water heaters use phase change materials (such as the phase change of solid substances) to store and release heat. When the heat exchange medium in contact with the phase change material reaches a certain temperature, the phase change material will absorb the extra heat in the heat exchange medium and change to another state, thereby storing the excess heat in it and realizing the heat storage process. When hot water is needed, the phase change material releases the stored heat to the water it contacts, keeping the water at a certain temperature. Based on this, the advantage of phase change electric water heaters is that they can save energy to a certain extent and improve the efficiency of the water heater.

[0005] The phase change electric water heater in the prior art mostly adopts a coil heat exchanger, and the phase change material is filled in the box of the coil heat exchanger. Tap water passes through the coil, and an external circulation control pipeline is connected. The circulation direction of the tap water is controlled by the control pipeline to realize the conversion of the heat storage and water heating process of the phase change electric water heater. This phase change electric water heater in the prior art cannot store heat during the water use process. When the heat stored in the phase change material is exhausted or consumed to a certain value, the water heater cannot output the required water temperature. That is, the water use time of this phase change electric water heater is short, and in order to ensure that the phase change material has sufficient heat storage, a long heat storage time is required. Utility Model Content

[0006] In order to overcome at least one of the defects of the above-mentioned prior art, the utility model provides a long-time live water washing phase change electric water heater; by setting up independent heat exchange areas and heat storage areas, heat storage operations can be performed during water use; by setting up the heat storage area as a plurality of independent heat storage units that can exchange heat with the heat exchanger individually, the time required for heat storage in the heat storage area is shortened, so that the phase change water heater can quickly use water.

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

[0008] A long-time live water washing phase-change electric water heater, comprising a box, a water pipe, and a heating module, a heat exchange area and a heat storage area arranged in the box; a heat exchange medium is arranged in the heat exchange area, the water pipe passes through the heat exchange area, and the water flow in the water pipe exchanges heat with the heat exchange medium in the heat exchange area;

[0009] The heat storage area includes at least two heat storage units, each of which is independent of each other and arranged in parallel with each other, and each of the heat storage units is respectively provided with a heat storage phase change material, and the heat exchange medium in the heat exchange area enters the heat storage unit and exchanges heat with the heat storage phase change material in the heat storage unit;

[0010] During heat storage, the heat exchange medium in the heat exchange area enters at least one of the heat storage units for heat exchange, and the heating module at least heats the heat exchange medium that needs to enter the heat storage unit;

[0011] When warm water is used, when the temperature of the heat exchange medium in the heat exchange area is lower than the set heat exchange threshold temperature, the heat exchange medium in the heat exchange area enters at least one of the heat storage units for heat exchange.

[0012] In this phase-change electric water heater, independent heat exchange areas and heat storage areas are set. During the water use process of the phase-change electric water heater, cold water exchanges heat with the heat exchange areas to obtain hot water. At the same time, the heat exchange area can also exchange heat with the heat storage area to achieve heat storage. In this phase-change electric water heater, the heat storage area is divided into multiple independent heat storage units that can exchange heat with the heat exchange area independently. During the heat storage process, one heat storage unit can be stored separately first, so that the water heater can quickly enter the water use operation. Then, during the water use process, other heat storage units are operated to store heat, which also solves the problem of long time consumption for heat storage to ensure the heat storage.

[0013] Furthermore, the heat storage unit includes a heat exchanger, and the heat storage phase change material is filled in the heat exchanger; the heat exchange medium in the heat exchange area enters the heat exchanger and exchanges heat with the heat storage phase change material in the heat exchanger.

[0014] Furthermore, the heat exchange medium is a heat-conducting liquid, which includes but is not limited to tap water, purified water, heat-conducting oil and a heat-conducting mixed solution.

[0015] Furthermore, a liquid pump is also provided in the box body to realize the circulation of heat exchange medium between the heat exchange area and the heat storage unit, the inlet of the liquid pump is connected to the heat exchange area, and the outlet of the liquid pump is respectively connected to each of the heat storage units; a return liquid conduit is connected to the heat storage unit, and the end of the return liquid conduit away from the heat storage unit is connected to the heat exchange area.

[0016] Furthermore, the outlet of the liquid pump is connected to liquid outlet conduits whose number is adapted to the heat storage unit, and the end of the liquid outlet conduit away from the liquid pump outlet is connected to the heat storage unit, and each of the liquid outlet conduits is respectively provided with an automatic control valve for controlling the on and off of the liquid outlet conduit.

[0017] Furthermore, a liquid inlet conduit is connected to the liquid inlet of the liquid pump, and one end of the liquid inlet conduit away from the liquid pump is connected to the heat exchange area. The heating module is arranged on the liquid inlet conduit to heat the heat exchange medium that is about to enter the heat storage unit.

[0018] Furthermore, the heating module is arranged in the heat exchange zone and immersed in the heat exchange medium in the heat exchange zone, the liquid inlet conduit extends into the heat exchange zone away from the liquid pump end and is connected to the heating module, and the inlet end of the liquid inlet conduit is immersed in the heat exchange medium in the heat exchange zone.

[0019] Furthermore, the heating module is disposed in the heat exchange zone and immersed in the heat exchange medium in the heat exchange zone to heat the heat exchange medium in the heat exchange zone.

[0020] Furthermore, the heating module is arranged in the heat exchange area and connected to the water pipe. The heating module is immersed in the heat exchange medium in the heat exchange area to heat the heat exchange medium and the water flow in the water pipe.

[0021] Furthermore, the heat exchange area is provided with an outer transparent area for observing the water flow in the water pipe, and the water pipe is provided with an inner transparent area for observing the water flow in the water pipe, and the inner transparent area faces the outer transparent area.

[0022] In summary, the long-time live water washing phase change electric water heater provided by the utility model has the following technical effects:

[0023] 1. Set up independent heat exchange area and heat storage area. When water is used, the water exchanges heat with the heat exchange area to obtain the required water temperature. At the same time, the heat exchange area can also exchange heat with the heat storage area synchronously. The heat exchange medium entering the heat storage area is heated by the heating module to realize the heat storage process. That is, the phase change electric water heater can perform heat storage operation during the water use process, effectively extending the water use time and meeting the long-term water use requirements.

[0024] 2. The heat storage area is set up as multiple independent heat storage units, each of which can work independently. When storing heat, each heat storage unit can store heat in turn. After a heat storage unit completes heat storage, the phase change electric water heater can use water and obtain the required water temperature, thereby solving the problem of long heat storage time of the phase change electric water heater in the prior art, and obtaining a phase change electric water heater with short heat storage time and the ability to quickly enter water use after startup. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of a long-time live water washing phase change electric water heater.

[0026] Figure 2 It is a structural schematic diagram of Example 2 of the heating module in the present utility model.

[0027] Figure 3 It is a structural schematic diagram of Example 3 of the heating module in the present utility model.

[0028] Figure 4 It is a structural schematic diagram of Example 4 of the heating module in the present utility model.

[0029] Figure 5 It is a structural schematic diagram of Example 5 of the heating module in the present utility model.

[0030] The meanings of the reference numerals are as follows:

[0031] 1. Box body; 2. Water pipe; 21. Heat transfer fins; 3. Heat storage area; 31. Heat storage unit; 311. Heat storage box; 312. Heat exchange coil; 313. Heat storage phase change material; 314. Heat exchange fins; 4. Heat exchange area; 41. Heat exchange medium; 5. Liquid pump; 51. Liquid outlet conduit; 52. Liquid inlet conduit; 53. Liquid return conduit; 6. Heating module; 7. Cold water pipe. DETAILED DESCRIPTION

[0032] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] 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. indicate directions or positional relationships 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.

[0034] 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.

[0035] See also Figure 1 The utility model discloses a structural schematic diagram of a long-time live water washing phase change electric water heater.

[0036] A long-time live water washing phase change electric water heater comprises a housing 1, a water pipe 2, a heating module 6 arranged in the housing 1, a heat exchange area 4 and a heat storage area 3. A heat exchange medium 41 is arranged in the heat exchange area 4, and the water pipe 2 passes through the heat exchange area 4, and the water flow in the water pipe 2 exchanges heat with the heat exchange medium 41 in the heat exchange area 4.

[0037] The heat exchange medium 41 in the heat exchange area 4 enters the heat storage area 3 to store heat in the heat storage area 3 or to reversely transport the heat in the heat storage area 3 out to the heat exchange area 4, and then heat is exchanged with the water flow in the water pipe 2 passing through the heat exchange area 4 to obtain hot water. The heat exchange area and the heat storage area here are both separately set up with the water pipe, and use a separate heat exchange medium. The heat exchange medium does not rely on the tap water in the water pipe. At any time, the heat exchange medium can circulate between the heat exchange area and the heat storage area to store heat in the heat storage area or transport the heat in the heat storage area out. While heating the heat exchange medium in the heat exchange area, it can also avoid mixing the water in the water pipe with the heat exchange medium, etc., to ensure that the water in the water pipe is clean and hygienic, and to achieve live water washing of the electric water heater.

[0038] In this solution, the heat storage area 3 includes at least two heat storage units 31, each heat storage unit 31 is independent of each other and is arranged in parallel with each other, and each heat storage unit 31 is respectively provided with a heat storage phase change material 313. The heat exchange medium 41 in the heat exchange area 4 enters the heat storage unit 31 and exchanges heat with the heat storage phase change material 313 in the heat storage unit 31.

[0039] During the heat storage process or the water use process, each heat storage unit can perform heat exchange work with the heat exchange zone at the same time, or any number of heat storage units can perform heat exchange work with the heat exchange zone at the same time, or each heat storage unit can perform heat exchange work with the heat exchange zone in turn, or according to the temperature inside the heat storage unit and the temperature inside the heat exchange zone, the required or appropriate heat storage unit and the heat exchange zone can perform heat exchange work through temperature control.

[0040] Based on the above scheme, in the phase change electric water heater of this scheme, when storing heat, the heat exchange medium 41 in the heat exchange area 4 enters at least one heat storage unit 31 for heat exchange, and the heating module 6 at least heats the heat exchange medium 41 that needs to enter the heat storage unit 31 to achieve heat storage.

[0041] When warm water is used, when the temperature of the heat exchange medium in the heat exchange area is lower than the set heat exchange threshold temperature, the heat exchange medium in the heat exchange area enters at least one heat storage unit for heat exchange.

[0042] That is, based on the above scheme, in order to achieve the shortest heat storage time and enable the phase change electric water heater to quickly enter water use, after the phase change electric water heater is started, it first enters the heat storage process. During the heat storage process, each heat storage unit is controlled to perform heat storage and heat exchange with the heat exchange area in turn.

[0043] In this way, after the first heat storage unit for heat storage completes heat storage, or after heat storage reaches a certain amount, the phase change electric water heater can start water operation.

[0044] When using water, the heat exchange medium in the heat exchange area exchanges heat with the heat storage unit that has just completed heat storage, so that the heat exchange medium in the heat exchange area is heated up, and the heated heat exchange medium exchanges heat with the water flow in the water pipe to obtain hot water. In this way, after the phase change water heater is started, the heat storage process is short and it can quickly enter the water use work, which solves the problem of long heat storage process of phase change electric water heaters in the prior art.

[0045] Based on the above short-term heat storage process, when water is used, the heat exchange medium in the heat exchange area is heated up, and the heat exchange medium in the heat exchange area can continue to exchange heat with other heat storage units that are not storing heat or have not completed heat storage, thereby realizing the heat storage work of these heat storage units. In order to ensure or improve the heat storage efficiency of the heat storage unit, the heat exchange medium that will enter the heat storage unit is heated by the heating module to improve the heat storage efficiency.

[0046] That is, based on the above scheme, after the phase change electric water heater is started, the number of heat storage units that first participate in the heat storage work can be selected according to needs, or all heat storage units can perform heat storage operations. If all heat storage units are selected to perform heat storage operations simultaneously, at this time, the heat exchange medium in the heat exchange area and each heat storage unit are circulated to achieve heat storage. After each heat storage unit has completed heat storage, that is, the heat storage work is completed, and the phase change electric water heater suspends the heat storage work.

[0047] During the water use process, the number of heat storage units that release heat into and out of the heat exchange area can be controlled based on the required water temperature and the temperature of the heat exchange medium in the heat exchange area.

[0048] In order to further improve the heat storage efficiency and extend the water use time, the amount of heat exchange medium only needs to fill the heat exchange area and one heat storage unit. The reduction in the amount of heat exchange medium is conducive to the rapid temperature rise of the heat exchange medium during the heat storage process, that is, an efficient heat storage process is achieved. Alternatively, during the water use process, ensure that the heat in the heat storage unit is released into the heat exchange medium, the temperature of the heat exchange medium rises, and the water use at a higher temperature is met. Of course, the amount of heat exchange medium can also completely fill the heat exchange area and each heat storage unit.

[0049] When using warm water, when the temperature of the heat exchange medium in the heat exchange area is lower than the set heat exchange threshold temperature, the heat exchange medium in the heat exchange area enters at least one heat storage unit for heat exchange. When storing heat, the heat exchange medium in the heat exchange area must enter one or more heat storage units to obtain heat to achieve heat storage and meet the needs. When using warm water, if the temperature of the heat exchange medium in the heat exchange area is lower than the heat exchange threshold temperature, the heat exchange medium in the heat exchange area enters at least one heat storage unit for heat exchange.

[0050] The so-called heat exchange threshold temperature refers to a set fixed heat exchange temperature value, that is, during the water use process, when the temperature of the heat exchange medium in the heat exchange zone is lower than the fixed heat exchange temperature value, the heat exchange medium in the heat exchange zone enters the heat storage unit for heat exchange. The heat exchange threshold temperature is set according to the heat exchange ratio of the heat exchange medium to ensure that the water temperature obtained after heat exchange in the heat exchange zone is the required water temperature. At the same time, the fixed heat exchange temperature value is used as the heat exchange threshold to ensure that the heat exchange medium in the heat exchange zone always maintains a high temperature before or in the early stage of using warm water or during the water use, so that the high-temperature water use needs can be met at all times and the high-temperature water heat exchange can be responded to in time. In this solution, the heat storage unit 31 includes a heat exchanger. The heat storage phase change material is filled in the heat exchanger; the heat exchange medium in the heat exchange zone enters the heat exchanger and exchanges heat with the heat storage phase change material in the heat exchanger.

[0051] To facilitate understanding of the heat exchanger, an embodiment of the heat exchanger is provided below. Figure 1The heat exchanger includes a heat storage tank 311 and a heat exchange coil 312 placed in the heat storage tank 311. Furthermore, a heat storage phase change material 313 is filled in the heat exchange coil 312. The heat exchange medium 41 in the heat exchange area 4 enters the heat storage tank 311 and exchanges heat with the heat storage phase change material 313 in the heat exchange coil 312. The heat storage phase change material 313 is filled in the heat exchange coil 312, and the heat exchange medium is outside the heat exchange coil 312. Compared with the arrangement method in which most of the prior art places the heat exchange medium in the heat exchange coil, the contact area between the heat exchange medium and the heat exchange coil is increased, and the heat exchange efficiency between the heat exchange medium and the heat storage phase change material 313 is improved. In addition, when the heat exchange medium exchanges heat with the heat storage phase change material 313, when the heat exchange medium flows in the heat storage unit 31, the heat exchange medium itself is mixed more evenly, and the heat exchange medium obtains the maximum amount of heat from the heat storage phase change material 313 or the heat storage phase change material 313 can absorb more heat from the heat exchange medium, which facilitates the heat exchange medium entering the heat storage box 311 and the heat storage phase change material 313 to fully exchange heat, thereby improving the heat exchange efficiency.

[0052] In this solution, in order to reduce heat loss, the heat storage box 311 is an insulation box, which reduces the amount of heat in the heat exchange medium radiated outward from the heat storage box 311 and improves the heat exchange efficiency. Furthermore, an insulation box is also added to the heat exchange area to insulate the heat exchange medium in the heat exchange area and reduce heat loss. Furthermore, the box 1 of the phase change electric water heater is also set as an insulation box to further reduce the heat loss of the phase change electric water heater itself.

[0053] In this solution, in order to facilitate the transportation of the heat exchange medium 41 and facilitate the heat exchange between the heat exchange medium and the heat storage phase change material 313 and the water flow in the water pipe, the heat exchange medium 41 is a liquid. Specifically, the heat exchange medium 41 is a heat-conducting liquid. The heat-conducting liquid includes but is not limited to tap water, pure water, heat-conducting oil, and heat-conducting mixed solution, etc. The heat-conducting liquid is sealed in the heat exchange area and the heat storage area, and only circulates inside the heat exchange area and the heat storage area, and basically no loss of quantity occurs. During the operation or use of the phase change electric water heater, it is basically unnecessary to replenish the heat-conducting liquid.

[0054] In order to facilitate the circulation of the heat exchange medium, which is a heat-conducting liquid, in the heat exchange area and the heat storage area, a liquid pump 5 is also provided in the box body 1, and the liquid pump 5 realizes the circulation of the heat exchange medium 41 between the heat exchange area 4 and the heat storage unit 31. The inlet of the liquid pump 5 is connected to the heat exchange area 4, and the outlet of the liquid pump 5 is respectively connected to each heat storage unit 31. The liquid pump 5 works to suck the heat-conducting liquid in the heat exchange area and transport it to the designated heat storage unit as needed, so that the heat exchange medium exchanges heat with the heat storage unit. A return liquid conduit 53 is connected to the heat storage unit 31, and the end of the return liquid conduit 53 away from the heat storage unit 31 is connected to the heat exchange area 4, so as to realize the circulation of the heat exchange medium in the heat storage unit back to the heat exchange area.

[0055] In order to facilitate the control of the number of heat storage units participating in the heat exchange work during the heat storage process and the water use process, or to control the required heat storage units to perform heat exchange, the outlet of the liquid pump 5 is connected with a liquid outlet conduit 51 whose number is adapted to the heat storage unit 31, and the end of the liquid outlet conduit 51 away from the outlet of the liquid pump 5 is connected to the heat storage unit 31, and an automatic control valve for controlling the opening and closing of the liquid outlet conduit 51 is respectively provided on each liquid outlet conduit 51. The automatic control valve generally adopts a solenoid valve to realize automatic control. The automatic control valve controls the opening and closing of the liquid outlet conduit 51 to realize the control of whether the liquid outlet conduit 51 is connected to the second-generation heat storage unit to participate in the heat exchange.

[0056] A liquid inlet conduit 52 is connected to the liquid inlet of the liquid pump 5, and one end of the liquid inlet conduit 52 away from the liquid pump 5 is in communication with the heat exchange area 4. The liquid inlet conduit 52 is a main pipe for heat exchange medium circulation in the heat exchange area.

[0057] In order to facilitate the control of the temperature of the heat exchange medium exchanging heat with the heat storage unit 31, the heating module 6 is arranged on the liquid inlet conduit 52, and the liquid inlet conduit 52 is connected to the liquid inlet of the liquid pump. The heat exchange medium enters the designated heat storage unit through the liquid pump. Figure 1 shown. Figure 1 This is a schematic diagram of Example 1 of the installation position of the heating module. At this time, the heating module 6 only heats the heat exchange medium 41 that is about to enter the heat storage unit 31. The heat exchange medium is heated by the heating module and then transported to the designated heat storage unit through a liquid pump.

[0058] Based on the installation position of the heating module in the above embodiment 1, when the phase change electric water heater is storing heat, the liquid pump is started, and the heat exchange medium is heated by the heating module and then transported to the designated heat storage unit by the liquid pump to achieve heat storage.

[0059] Based on the installation position of the heating module in the above-mentioned embodiment 1, when water is used, the water flow in the water pipe exchanges heat with the heat exchange medium in the heat exchange area to obtain hot water. Since the heat exchange medium in the heat exchange area exchanges heat with the heat storage unit in the early stage, the heat exchange medium in the heat exchange area should have a certain temperature at this time. If the water temperature is lower than the heat exchange medium temperature, or lower than the set heat exchange temperature threshold of the heat exchange medium, at this time, the heat exchange medium in the heat exchange area directly exchanges heat with the water flow in the water pipe to obtain the required water temperature, then the heat exchange medium in the heat exchange area does not exchange heat with the heat storage area temporarily, the liquid pump does not start, and the heating module does not work.

[0060] If the water temperature is higher than the temperature of the heat exchange medium in the heat exchange area, or higher than the set heat exchange temperature threshold of the heat exchange medium, the required water temperature cannot be obtained solely relying on the heat exchange medium temperature in the heat exchange area at this time. At this time, the liquid pump is started, and the heat exchange medium in the heat exchange area should be connected with the heat storage unit to obtain the temperature in the heat storage unit, thereby increasing the heat exchange medium temperature in the heat exchange area and obtaining the required water temperature.

[0061] When the heat exchange medium and the heat storage unit are exchanging heat, one or several heat storage units are first selected for heat exchange to ensure that the heat exchange medium in the heat exchange area obtains the required temperature from the heat storage unit. After the heat release is completed in the heat storage unit or the heat storage units participating in the heat exchange, the heat exchange medium in the heat exchange area exchanges heat with other heat storage units that are not involved or still have enough heat to ensure the temperature of the heat exchange medium in the heat exchange area and the required water temperature. At the same time, the heat exchange medium in the heat exchange area continues to exchange heat with the heat storage unit after the heat release is completed, and the heating module is started, so that the heat exchange medium entering the heat storage unit after the heat release is completed is heated, so that the heat storage unit after the original heat release is completed performs heat storage, thus realizing the simultaneous heat storage work in the water use process and extending the water use time. Based on the installation position of the heating module in this embodiment 1, after the heating module is started, the heat exchange medium circulating with the heat storage unit that releases heat is also heated, which also increases the temperature of the heat exchange medium and can further extend the heat exchange time of the heat storage unit that releases heat, thus further realizing the simultaneous heat storage work in the water use process and extending the water use time.

[0062] In order to further control the temperature of the heat exchange medium entering the heat storage unit and improve the efficiency and speed of heat storage of the heat storage unit after the original heat is released, the heating module can also be installed on each liquid outlet conduit 51. At this time, the heating module is started, and only the heat exchange medium entering the heat storage unit and realizing heat storage of the heat storage unit can be heated, while the heat exchange medium circulating with the heat storage unit releasing heat is not heated. At this time, although the heat exchange medium circulating with the heat storage unit releasing heat is not heated, the heat exchange of the heat storage module releasing heat cannot be extended, but the heat exchange medium entering the heat storage unit to realize heat storage is quickly and accurately heated, which speeds up the heat storage speed of the heat storage unit, so that the heat storage unit can quickly complete heat storage, can quickly enter the heat release and heat exchange work again, and can also extend the water use time of the phase change electric water heater.

[0063] like Figure 2 , which is a schematic diagram of Embodiment 2 of the heating module 6. In this Embodiment 2, the heating module 6 can also be arranged in the heat exchange area 4 and immersed in the heat exchange medium 41 in the heat exchange area 4. At the same time, one end of the liquid inlet conduit 52 away from the liquid pump 5 extends into the heat exchange area 4 and is connected to the heating module 6. One end of the inlet of the liquid inlet conduit 52 is immersed in the heat exchange medium 41 in the heat exchange area 4.

[0064] In this embodiment 2, the heating module 6 can heat the heat exchange medium in the heat exchange area, and can also heat the heat exchange medium that is about to enter the heat storage unit. The working process and function of the heating module heating the heat exchange medium that is about to enter the heat storage unit are the same as those in embodiment 1, and will not be repeated here. Similarly, after the heating module 6 is located in the heat exchange area, it can also be changed from being set on the liquid inlet conduit 52 to being set on each liquid outlet conduit 51. After the heating module is set on each liquid outlet conduit 51, its working process and function have been introduced above, and will not be repeated here.

[0065] In the present embodiment 2, the heating module 6 is arranged in the heat exchange area and immersed in the heat exchange medium in the heat exchange area, and can heat the heat exchange medium in the heat exchange area. When storing heat, the heat exchange medium is heated in the heat exchange area and then circulated to each heat storage unit, or in the later stage of water use, the heat in the heat storage area is completely released, and the temperature of the heat exchange medium in the heat exchange area is also relatively low. At this time, the heating module directly heats the heat exchange medium in the heat exchange area, and controls the heat exchange medium in the heat exchange area not to exchange heat with the heat storage area temporarily, so as to realize the rapid heating of the heat exchange medium in the heat exchange area and use it to exchange heat with the water flow in the water pipe, in order to obtain the required water temperature, or to increase the water temperature as much as possible to meet the needs.

[0066] like Figure 3 As shown, it is a schematic diagram of Example 3 of the heating module 6. In this Example 3, the heating module 6 is directly arranged in the heat exchange zone 4 and immersed in the heat exchange medium 41 in the heat exchange zone 4, and heats the heat exchange medium 41 in the heat exchange zone 4. The heating module 6 is only arranged in the heat exchange zone and immersed in the heat exchange medium in the heat exchange zone, and only heats the heat exchange medium in the heat exchange zone. When storing heat, the heat exchange medium is heated in the heat exchange zone and then circulated to each heat storage unit. Or in the later stage of water use, the heat in the heat storage zone is completely released, and the temperature of the heat exchange medium in the heat exchange zone is also relatively low. At this time, the heating module directly heats the heat exchange medium in the heat exchange zone, and controls the heat exchange medium in the heat exchange zone not to exchange heat with the heat storage zone temporarily, so as to realize the rapid heating of the heat exchange medium in the heat exchange zone and use it to exchange heat with the water flow in the water pipe, in order to obtain the required water temperature, or to increase the water temperature as much as possible to meet the needs. In the early and middle stages of water use, the heating module can also work to heat the heat exchange medium in the heat exchange area. At the same time, the heat exchange medium in the heat exchange area also exchanges heat with the heat storage unit to store heat in the heat storage unit to extend the water use time.

[0067] like Figure 4The figure shows a schematic diagram of Example 4 of the heating module 6. In this Example 4, the heating module 6 is arranged in the heat exchange zone 4 and connected to the water pipe 2. The heating module 6 is immersed in the heat exchange medium 41 in the heat exchange zone 4 to heat the heat exchange medium 41 and the water flow in the water pipe 2. The heating module 6 is arranged in the heat exchange zone 4 to heat the heat exchange medium in the heat exchange zone. Its working process and function have been introduced above and will not be repeated here. In this Example 4, after the heating module is started, while heating the heat exchange medium in the heat exchange zone, it can also heat the water flow in the water pipe, especially in the later stage of water use, when the heat in the heat exchange medium is low, the heating module heats the water flow in the water pipe, which is conducive to directly increasing the water temperature and ensuring the water temperature in the later stage of water use.

[0068] like Figure 5 As shown, it is a schematic diagram of Example 5 of the heating module 6. In this Example 5, on the basis of Example 4, the heating module is arranged in the heat exchange area and connected to the water pipe. At the same time, it can also be connected to the liquid outlet conduit 51 or the liquid inlet conduit 52 to achieve heating of the heat exchange medium passing through the liquid outlet conduit 51 or the liquid inlet conduit 52, thereby extending the heat release time of the heat storage unit, increasing the number of heat release cycles of the heat storage unit, and extending the water use time of the phase change electric water heater.

[0069] In this solution, the heating module generally uses a heating wire, a heating tube, a heating plate, a heating tube, etc., and is connected to electricity. The heating wire, the heating tube, the heating plate, the heating tube, etc. are set at a designated position for heating.

[0070] In order to improve the heat exchange efficiency, a coil is used for the water pipe. The coil can be spirally coiled, can be coiled in a Chinese character, or can be coiled in a reciprocating folding shape. The cross section of the coil can be circular or oblong. In short, the goal and purpose of all settings is to increase the contact area between the coil surface and the heat exchange medium. Further, a heat-conducting fin 21 is set on the water pipe to increase the heat exchange efficiency between the heat exchange medium in the heat exchange area and the water flow in the water pipe. The heat exchange area 4 can also directly adopt a water jacket structure to achieve heat exchange. The heat exchange area 4 can adopt any structure in the prior art that can meet the use requirements of the heat exchange area of ​​this scheme. In order to further improve the heat storage efficiency of the heat storage area and increase the heat exchange efficiency of the heat storage area, a heat exchange fin 314 is set on the heat exchange coil 312 of the heat exchanger to increase the heat exchange efficiency between the heat storage phase change material and the heat exchange medium. In order to further enhance the storage effect of the heat storage area, a heating structure can be added to the heat exchanger, and the heat exchanger is directly heated by the heating structure to store heat in the heat storage phase change material 313. When the heat exchanger adopts the structure of the heat exchange coil 312, a heating structure is added to the heat exchange coil 312 filled with the heat storage phase change material 313 in the heat storage area, and the heat exchange coil 312 is directly heated by the heating structure to store heat in the heat storage phase change material 313.

[0071] In this solution, the phase change electric water heater also has a cold water pipe 7, which is connected in parallel with the water pipe 2 and is arranged outside the box 1. The hot water obtained through heat exchange in the heat exchange area is mixed with the water flow in the cold water pipe and then discharged to the water use part. By controlling the water flow velocity and water flow in the cold water pipe, the final water temperature can be accurately controlled.

[0072] The heat exchange area 4 is provided with an outer transparent area for observing the water flow in the water pipe, and the water pipe is provided with an inner transparent area for observing the water flow in the water pipe, and the inner transparent area faces the outer transparent area. The flow of the water flow in the water pipe is observed through the outer transparent area and the inner transparent area, and the water pipe is connected to the cold water pipe at the same time, so that the water flow in the water pipe is transported by the cold water pipe, realizing the visualization of live water washing and enhancing the user's experience.

[0073] 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 long-time live water washing phase change electric water heater, characterized in that: It comprises a box, a water pipe, a heating module, a heat exchange area and a heat storage area arranged in the box; a heat exchange medium is arranged in the heat exchange area, the water pipe passes through the heat exchange area, and the water flow in the water pipe exchanges heat with the heat exchange medium in the heat exchange area; The heat storage area includes at least two heat storage units, each of which is independent of each other and arranged in parallel with each other, and each of the heat storage units is respectively provided with a heat storage phase change material, and the heat exchange medium in the heat exchange area enters the heat storage unit and exchanges heat with the heat storage phase change material in the heat storage unit; During heat storage, the heat exchange medium in the heat exchange area enters at least one of the heat storage units for heat exchange, and the heating module at least heats the heat exchange medium that needs to enter the heat storage unit; When warm water is used, when the temperature of the heat exchange medium in the heat exchange area is lower than the set heat exchange threshold temperature, the heat exchange medium in the heat exchange area enters at least one of the heat storage units for heat exchange.

2. The long-time live water washing phase change electric water heater according to claim 1, characterized in that: The heat storage unit comprises a heat exchanger, and the heat storage phase change material is filled in the heat exchanger; The heat exchange medium in the heat exchange area enters the heat exchanger and exchanges heat with the heat storage phase change material in the heat exchanger.

3. The long-time live water washing phase-change electric water heater according to claim 1 or 2, characterized in that: The heat exchange medium is a heat-conducting liquid, which includes but is not limited to tap water, purified water, heat-conducting oil and a heat-conducting mixed solution.

4. The long-time live water washing phase-change electric water heater according to claim 1 or 2, characterized in that: The box body is also provided with a liquid pump for realizing the circulation of heat exchange medium between the heat exchange area and the heat storage unit. The inlet of the liquid pump is connected to the heat exchange area, and the outlet of the liquid pump is respectively connected to each of the heat storage units; the heat storage unit is connected to a liquid return conduit, and the end of the liquid return conduit away from the heat storage unit is connected to the heat exchange area.

5. The long-time live water washing phase-change electric water heater according to claim 4, characterized in that: The outlet of the liquid pump is connected to a number of liquid outlet conduits adapted to the heat storage unit, one end of the liquid outlet conduit away from the liquid pump outlet is connected to the heat storage unit, and each of the liquid outlet conduits is provided with an automatic control valve for controlling the on and off of the liquid outlet conduit.

6. The long-time live water washing phase-change electric water heater according to claim 4, characterized in that: The liquid inlet of the liquid pump is connected to a liquid inlet conduit, and one end of the liquid inlet conduit away from the liquid pump is connected to the heat exchange area. The heating module is arranged on the liquid inlet conduit to heat the heat exchange medium that is about to enter the heat storage unit.

7. The long-time live water washing phase-change electric water heater according to claim 6, characterized in that: The heating module is arranged in the heat exchange zone and immersed in the heat exchange medium in the heat exchange zone, the liquid inlet conduit extends into the heat exchange zone away from the liquid pump end and is connected to the heating module, and the inlet end of the liquid inlet conduit is immersed in the heat exchange medium in the heat exchange zone.

8. The long-time live water washing phase-change electric water heater according to claim 1, characterized in that: The heating module is disposed in the heat exchange zone and immersed in the heat exchange medium in the heat exchange zone to heat the heat exchange medium in the heat exchange zone.

9. The long-time live water washing phase-change electric water heater according to claim 1, characterized in that: The heating module is arranged in the heat exchange area and connected to the water pipe. The heating module is immersed in the heat exchange medium in the heat exchange area to heat the heat exchange medium and the water flow in the water pipe.

10. The long-time live water washing phase change electric water heater according to claim 1, characterized in that: The heat exchange area is provided with an outer transparent area for observing the water flow in the water pipe, and the water pipe is provided with an inner transparent area for observing the water flow in the water pipe, and the inner transparent area faces the outer transparent area.

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