A string plate type phase change energy storage water heater

Abstract

A series-panel phase change energy storage water heater includes a heat exchange component and a heat storage component, which are separately connected by pipelines. An internal circulation channel is formed within the heat storage component, circulating in a continuous manner with the heat exchange component. The heat storage component contains several heat storage plates for heat transfer and a heater for providing heat to the heat storage plates. The internal circulation channel flows sequentially around the heat storage plates, and the heater is located within the internal circulation channel. Compared with existing technologies, by connecting the heat exchange component and the heat storage component through pipelines and setting them separately, the water pressure of the municipal water network does not affect the normal use of the heat storage component. The pressure requirements on the outer shell of the heat storage component are greatly reduced, allowing for one-piece plastic molding, thus reducing costs. Furthermore, the heat exchange component connected to the municipal water network is not connected to the electrical circuit, achieving water and electricity separation between the municipal water network and the electrical circuit. Simultaneously, the water in the heat exchange pipeline undergoes heat exchange within the heat exchange component without storing hot water, resulting in fresher and more hygienic water.

Description

Technical Field

[0001] This invention relates to the field of phase change water heater technology, specifically to a series-panel type phase change energy storage water heater. Background Technology

[0002] A phase change water heater is a water heater that uses the phase change properties of phase change materials to store and release heat. It has advantages such as high efficiency and energy saving, and stable constant temperature. Phase change materials are substances that change their physical properties with temperature changes and can provide latent heat. Phase change water heaters use the property of phase change materials to absorb or release a large amount of latent heat during the phase change process to store and release heat. When the water heater is heating, the phase change material absorbs heat and undergoes a phase change to store energy; when hot water is needed, the phase change material releases heat and transfers the heat to the cold water, thus raising the temperature of the cold water.

[0003] Existing variable energy storage water heaters typically consist of an inner tank, serpentine tubes, and fins. Phase change material (PCM) is directly filled into the gaps between the fins, requiring a tight connection between the fins and the serpentine tubes. Furthermore, each bend in the serpentine tubes requires welding, making the process complex and expensive. Once the PCM is filled, the entire heat exchange structure becomes integrated. If the welding of the water heater pipes is faulty, incomplete, or other process defects cause cracks, the PCM may contaminate the domestic water or undergo a change in properties due to water absorption, resulting in a rapid decline in its heat storage and release performance, making disassembly and repair impossible. In addition, during charging, an electric heating device is usually used to directly contact the PCM. Because the PCM may have low thermal conductivity and poor fluidity, temperature uniformity is poor during heating, and the charging time is long.

[0004] Chinese patent CN221055241U discloses a water heater inner tank and a phase change water heater, including a shell filled with a phase change material; a heat exchange tube for supplying water to be heated, through which the water to be heated exchanges heat with the phase change material; a plurality of first fins disposed in the shell and in contact with the phase change material, the heat exchange tube passing through the first fins; a heating device that extends at least partially into the shell to heat the phase change material; the heating device passing through at least a portion of the first fins; and a heat-conducting structure on the surface of the heating device extending into the phase change material to transfer heat from the heating device to the phase change material.

[0005] The inner tank of the phase change water heater disclosed above has a cylindrical structure. When it needs to be connected to the municipal pipeline, the water pressure in the municipal pipeline makes it difficult to achieve a lightweight and compact design for the water heater. At the same time, there is stagnant water in the heater after use. The stagnant water will become a "culture dish" for microorganisms and impurities, affecting the quality of the water output. Summary of the Invention

[0006] The present invention aims to overcome the defects in the prior art and provide a split-type phase change energy storage water heater that achieves water and electricity separation and direct hot water output.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a series-panel phase change energy storage water heater, comprising a heat exchange component and a heat storage component, wherein the heat exchange component and the heat storage component are connected separately by pipelines, and an inner circulation channel is formed within the heat storage component that is circulated and connected to the heat exchange component; the heat storage component is equipped with a plurality of heat storage plates for transferring heat and a heater for providing heat to the heat storage plates, the inner circulation channel is arranged to flow around the plurality of heat storage plates in sequence, and the heater is located within the inner circulation channel; the heat exchange component is formed with a heat exchange cavity connected to the circulation channel, and the heat exchange component is provided with a heat exchange pipe located within the heat exchange cavity.

[0008] As a preferred embodiment of the present invention, the heat exchange cavity is provided to enclose the heat exchange pipe, and the heat exchange pipe has an inlet and an outlet extending to the outside of the heat exchange assembly at both ends. The inlet is provided with a temperature sensor for identifying the temperature of the heat exchange cavity and a flow sensor for identifying the flow rate of the inlet.

[0009] As a preferred embodiment of the present invention, a circulation pump for driving the internal circulation channel and the liquid in the heat exchange chamber to circulate internally is installed on the pipeline.

[0010] As a preferred embodiment of the present invention, the thermal storage assembly includes a thermal storage box and a cover plate installed on the top of the thermal storage box. An internal circulation outlet located at the bottom of the thermal storage box and an internal circulation inlet diagonally arranged along the thermal storage box opposite to the internal circulation outlet are formed on the thermal storage box. A reserved hole for installing a heater is formed on the cover plate, and an external wiring extending out of the reserved hole is formed at the end of the heater.

[0011] In a preferred embodiment of the present invention, the heat storage plate is vertically arranged inside the heat storage box, the bottom of the heat storage box is provided with a base plate for abutting the heat storage plate, and the heater is suspended inside the heat storage box.

[0012] As a preferred embodiment of the present invention, a plurality of heat storage plates are arranged in a row, and the plurality of heat storage plates are arranged alternately and staggered to form an internal circulation channel, and an inner groove is formed on the inner wall of the heat storage box to engage with the side of the heat storage plate.

[0013] As a preferred embodiment of the present invention, a plurality of the heat storage plates are arranged in a row, and a plurality of baffles for forming an internal circulation channel are provided inside the heat storage box, and the plurality of baffles are arranged alternately and staggered in sequence.

[0014] As a preferred embodiment of the present invention, the cover plate is formed with an upper snap-fit ​​groove for snapping the top of the thermal storage plate, and the bottom plate is formed with a lower snap-fit ​​groove for snapping the bottom of the thermal storage plate.

[0015] As a preferred embodiment of the present invention, the baffle and the heat storage box are an integral structure, and a positioning groove for positioning the baffle is formed on the cover plate.

[0016] In a preferred embodiment of the present invention, the heater is provided with an internal circulation outlet.

[0017] Compared to existing technologies, by connecting the heat exchange components and the heat storage components through pipelines and setting them up separately, the heat storage components are not directly connected to the municipal water supply network. The water pressure of the municipal water supply network does not affect the normal use of the heat storage components, and the pressure requirements for the outer shell of the heat storage components are greatly reduced. Plastic integral molding can be used instead of sheet metal parts, which reduces costs. At the same time, the heat exchange components connected to the municipal water supply network are not connected to the electrical circuit, realizing the separation of water and electricity between the municipal water supply network and the electrical circuit, and the overall safety performance is better. The heat exchange and heat storage components form an internal circulation structure. The internal circulation can use pure water to avoid scale buildup on the surface of the heat storage plate and heat exchange pipes during the heat exchange process, thus reducing maintenance costs. In the split-structure heat exchange components and heat storage components, the size of the heat exchange components can be designed according to actual needs. By compressing the size of the heat exchange components, the size of the heat exchange pipes can be compressed, thereby reducing the amount of water stored in the heat exchange pipes and preventing "dead water" from forming in the heat exchange pipes. Under the rapid heat exchange effect in the heat exchange components, fresh hot water can be generated in the heat exchange pipes. Combined with the heating method of the heat storage plate and heater for circulating water, the water entering the heat exchange pipes is heated only when the municipal water network is in operation. Hot water is not stored, and the water quality is fresher and more hygienic. By forming an internal circulation channel that flows sequentially around each heat storage plate, combined with an internal circulation structure and a circulation pump, forced convection of internal circulating water between the heat storage plates can be achieved, which can accelerate the heat storage and heat release rate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the thermal storage component; Figure 3 This is a top view of the thermal storage component; Figure 4 This is a side view of the thermal storage component; Figure 5 yes Figure 3 Cross-sectional view of the AA surface in Embodiment 1; Figure 6 yes Figure 4 Cross-sectional view of embodiment 1 of the BB surface; Figure 7 yes Figure 3 Cross-sectional view of the AA surface in Example 2; Figure 8 yes Figure 4 Cross-sectional view of the middle BB surface in Embodiment 2; Reference numerals: 1. Heat exchange component; 11. Heat exchange chamber; 2. Heat storage component; 21. Heat storage box; 22. Cover plate; 22. Positioning groove; 221. Reserved hole; 23. Base plate; 24. Upper snap-fit ​​groove; 25. Lower snap-fit ​​groove; 26. Inner groove; 27. Inner circulation inlet; 28. Inner circulation outlet; 29. ​​Pipeline; 3. Inner circulation channel; 4. Heat exchange pipe; 5. Inlet; 51. Outlet; 52. Temperature sensor; 53. Flow sensor; 54. Circulation pump; 6. Heater; 7. External wiring; 71. Heat storage plate; 8. Baffle; 9. Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-8 As shown, a series-panel phase change energy storage water heater includes a heat exchange component 1 and a heat storage component 2, which are connected separately by a pipe 3. The heat storage component 2 has an inner circulation channel 4 that is circulated and connected to the heat exchange component 1. The heat storage component 2 is equipped with several heat storage plates 8 for transferring heat and a heater 7 for providing heat to the heat storage plates 8. The inner circulation channel 4 is arranged to flow around the several heat storage plates 8 in sequence, and the heater 7 is located in the inner circulation channel 4. The heat exchange component 1 has a heat exchange cavity 11 that is connected to the circulation channel, and the heat exchange component 1 is provided with a heat exchange pipe 5 located in the heat exchange cavity 11.

[0021] The heat storage plate 8 is filled with a phase change material with high heat storage performance.

[0022] The heat exchange component 1 and the heat storage component 2 are designed separately, and the heat exchange pipe 5 in the heat exchange component 1 is connected to the municipal pipeline. The heat exchange pipe 5 is used to withstand the water pressure of the municipal pipeline. There are no electrical devices in the heat exchange component 1, which ensures the safety of the heat exchange pipe 5 during the heat exchange process with the heat exchange chamber 11.

[0023] The heat exchange component 1 and the heat storage component 2 are connected by the pipeline 3, and the liquid in the inner circulation channel 4 is heated by the heater 7. The heated liquid enters the heat exchange chamber 11 and exchanges heat with the heat exchange pipe 5. The heated liquid then enters the heat storage component 2 again. The residual heat of the liquid is absorbed by the heat storage plate 8 in the inner circulation channel 4 for heat storage. At the same time, the liquid initially located in the heat exchange chamber 11 is heated by the heat storage plate 8 after entering the heat storage component 2, achieving rapid heating of the liquid. The liquid is further heated by the heater 7 to meet the heat exchange requirements with the heat exchange pipe 5.

[0024] The heat exchange chamber 11 is enclosed by the heat exchange pipe 5, and the heat exchange pipe 5 has an inlet 51 and an outlet 52 extending to the outside of the heat exchange assembly 1 at both ends. The inlet 51 is equipped with a temperature sensor 53 for identifying the temperature of the heat exchange chamber 11 and a flow sensor 54 for identifying the flow rate of the inlet 51.

[0025] The heat exchange pipe 5 is a serpentine pipe installed inside the heat exchange chamber 11. Under the action of the serpentine pipe, the heat exchange area between the heat exchange pipe 5 and the heat exchange chamber 11 is maximized, thereby accelerating the heating of the municipal cold water in the heat exchange pipe 5. The temperature sensor 53 is installed against the inner wall of the heat exchange pipe 5 and is located inside the heat exchange chamber 11. The temperature of the heat exchange pipe 5 is the temperature of the liquid in the heat exchange chamber 11. The temperature of the liquid in the heat exchange chamber 11 is identified by the temperature sensor 53, and the heat exchange effect of the heat exchange component 1 is detected.

[0026] The flow sensor 54 can be located at the connection between the heat exchange pipe 5 and the municipal pipe network. The flow sensor 54 can be linked with the circulating pump 6. The flow sensor 54 can identify the water inlet status of the municipal pipe network, thereby controlling the circulating pump 6.

[0027] When the flow sensor 54 detects the flow signal, the circulating pump 6 starts simultaneously to ensure that the municipal cold water can continuously absorb heat as it passes through the heat exchange component 1, thereby achieving rapid heat exchange and water output of the municipal cold water.

[0028] A circulation pump 6 is installed on the pipeline 3 to drive the internal circulation of the liquid in the internal circulation channel 4 and the heat exchange chamber 11. The circulation pump 6 is used to drive the liquid flow, thereby realizing the internal circulation of the liquid between the heat exchange component 1 and the heat storage component 2 through the pipeline 3. The liquid is always located in the heat exchange component 1, the heat storage component 2 and the pipeline 3.

[0029] The liquid can be pure water, which can avoid the formation of scale on the surface of the heat exchange pipe 5 and the heat storage plate 8 during the heat exchange process between the heat exchange pipe 5 and the liquid and the heat storage plate 8, thus reducing maintenance costs.

[0030] The thermal storage assembly 2 includes a thermal storage box 21 and a cover plate 22 installed on the top of the thermal storage box 21. The thermal storage box 21 has an internal circulation outlet 29 located at the bottom of the thermal storage box 21 and an internal circulation inlet 28 arranged diagonally along the thermal storage box 21 with the internal circulation outlet 29. The cover plate 22 has a reserved hole 23 for installing a heater 7. The heater 7 has an external wiring 71 extending out of the reserved hole 23 at its end.

[0031] The heat storage box 21 is a hollow box structure. Inside the heat storage box 21, there is a heat storage plate 8 for exchanging heat with the liquid inside the heat storage box 21. The cover plate 22 is used to seal the top of the heat storage box 21. Under the combined action of the cover plate 22 and the heat storage box 21, the heat storage component 2 forms a closed structure with only an internal circulation outlet 29 and an internal circulation inlet 28. Both the internal circulation outlet 29 and the internal circulation inlet 28 are connected to the pipeline.

[0032] The heater 7 is suspended inside the heat storage tank 21. The heater 7 is used to heat the liquid located in the inner circulation channel 4. The heater 7 is energized through an external wiring 71 extending to the outside of the cover plate 22. Under the action of energization, the resistance wire inside the heater 7 is energized and heated.

[0033] The heat storage plate 8 is vertically installed inside the heat storage box 21. The bottom of the heat storage box 21 is provided with a base plate 24 for abutting the heat storage plate 8. The heater 7 is suspended inside the heat storage box 21. The base plate 24 is used to support the bottom of the heat storage plate 8, and the cover plate 22 is used to press the top of the heat storage plate 8. Under the action of the base plate 24 and the cover plate 22, the heat storage plate 8 is stably clamped in the vertical state.

[0034] Example 1: Several heat storage plates 8 are arranged in a row, and the heat storage plates 8 are arranged alternately and staggered to form an internal circulation channel 4. The inner wall of the heat storage box 21 has an inner groove 27 that engages with the side of the heat storage plate 8.

[0035] The number of heat storage plates 8 is set according to actual needs. Several heat storage plates 8 are arranged in parallel, and several heat storage plates 8 are staggered along the arrangement direction of the heat storage plates 8. The side of the heat storage plate 8 is engaged with the inner wall of the heat storage box 21, and there is a gap between the heat storage plate 8 and the inner wall of the heat storage box 21 on the other side. The side of the adjacent heat storage plate 8 is engaged with the inner wall of the heat storage box 21 on the other side, and there is a gap between the adjacent heat storage plate 8 and the inner wall of the heat storage box 21 where the previous heat storage plate 8 is engaged.

[0036] Under the action of several heat storage plates 8 arranged in a row, a serpentine internal circulation channel 4 is formed. The liquid in the internal circulation channel 4 flows around each heat storage plate 8 under the action of the serpentine structure, realizing efficient heat exchange with the heat storage plate 8.

[0037] The cover plate 22 has an upper locking groove 25 for locking the top of the thermal storage plate 8, and the bottom plate 24 has a lower locking groove 26 for locking the bottom of the thermal storage plate 8. Under the action of the cover plate 22 and the bottom plate 24, the thermal storage plate 8 is stably clamped in a vertical state.

[0038] In the first embodiment, the heat storage plate 8 is snapped onto the inner wall of the heat storage box 21. While the heat storage plate 8 can exchange heat with the liquid in the heat storage component 2, under the action of several heat storage plates 8 arranged alternately and staggered in sequence, an internal circulation channel 4 is formed that can exchange heat with the heat storage plate 8 efficiently. At this time, the top, bottom and one side of the heat storage plate 8 are snapped onto the heat storage box 21 and the cover plate 22, so as to realize the stable installation of the heat storage plate 8 in the heat storage box 21.

[0039] Example 2: Several heat storage plates 8 are arranged in a row, and several baffles 9 are provided in the heat storage box 21 to form an internal circulation channel 4. The baffles 9 are arranged alternately and staggered in sequence.

[0040] The number of heat storage plates 8 is set according to actual needs. Several heat storage plates 8 are arranged in parallel, and several heat storage plates 8 are arranged in the same direction. Both sides of the heat storage plates 8 form gaps with the inner wall of the heat storage box 21. Baffles 9 are connected to the inner wall of the heat storage box 21, and there is a gap between the baffles 9 and the inner wall of the heat storage box 21 on the other side. The side of the adjacent baffles 9 is connected to the inner wall of the heat storage box 21 on the other side, and there is a gap between the adjacent baffles 9 and the inner wall of the heat storage box 21 to which the previous baffle 9 is connected.

[0041] Under the action of several baffles 9, a serpentine internal circulation channel 4 is formed. The liquid in the internal circulation channel 4 flows around each heat storage plate 8 under the action of the serpentine structure, realizing efficient heat exchange with the heat storage plate 8.

[0042] The cover plate 22 has an upper locking groove 25 for locking the top of the heat storage plate 8, and the bottom plate 24 has a lower locking groove 26 for locking the bottom of the heat storage plate 8. Under the action of the cover plate 22 and the bottom plate 24, the heat storage plate 8 is stably clamped in a vertical state. The baffle 9 and the heat storage box 21 are an integral structure, and the cover plate 22 has a positioning groove 221 for positioning the baffle 9.

[0043] In the second embodiment, the heat storage plate 8 is installed in the middle of the heat storage box 21. There are gaps between the heat storage plate 8 and the heat storage box 21 on both sides, so that the heat storage plate 8 can be fully wrapped by the inner circulation channel 4. While the heat storage plate 8 can exchange heat with the liquid in the heat storage component 2, under the action of several baffles 9 arranged alternately and staggered in sequence, an inner circulation channel 4 is formed that can exchange heat with the heat storage plate 8 efficiently. At this time, the top and bottom of the heat storage box 21 and the cover plate 22 of the heat storage plate 8 are engaged, so that the heat storage plate 8 is stably installed in the heat storage box 21.

[0044] The heater 7 is positioned corresponding to the internal circulation outlet 29, so that the heated liquid can flow directly into the heat exchange assembly 1 for heat exchange under the action of the circulation pump 6.

[0045] In actual use, in the initial state, the circulating water can be divided into circulating water in the heat exchange component 1, circulating water in the heat storage component 2, and circulating water in the pipe 3.

[0046] The water heater of this application has a heat storage function and a heat release function. When the heat storage function is turned on, the circulation pump 6 and the heater 7 start synchronously. The circulating water in the heat storage component 2 is heated by the heater 7 and flows into the heat exchange component 1. Under the action of the circulation pump 6, it flows back into the inner circulation channel 4 of the heat storage component 2. At this time, the circulating water transfers heat to the heat storage plate 8 when passing through the inner circulation channel 4, thus completing the heat storage.

[0047] When the heat release function is activated, the flow sensor 54 captures the flow signal, and the circulating pump 6 and heater 7 start synchronously. The circulating water in the heat storage component 2 is heated by the heater 7 and flows into the heat exchange component 1, where it exchanges heat with the heat exchange pipe 5. At the same time, the circulating water in the heat exchange component 1 enters the inner circulation channel 4 of the heat storage component 2. The heat storage plate 8 releases heat to heat the circulating water initially located in the heat exchange component 1, and then reheats it as it flows through the heater 7. The reheated circulating water then flows back into the heat exchange component 1 under the action of the circulating pump 6 to exchange heat with the heat exchange pipe 5, thus heating the municipal cold water. The reheated circulating water then flows back into the inner circulation channel 4 of the heat storage component 2, where the heat storage plate 8 releases heat again to heat the circulating water, and so on.

[0048] The thermal storage component 2 is not directly connected to the municipal pipe network, and the water pressure of the municipal pipe network does not affect the use of the thermal storage component 2. The thermal storage component 2 can be made of plastic material that is easier to form.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0050] Although this document frequently uses reference numerals from the accompanying drawings, such as heat exchange component 1, heat exchange chamber 11, heat storage component 2, heat storage tank 21, cover plate 22, positioning groove 221, reserved hole 23, bottom plate 24, upper snap-fit ​​groove 25, lower snap-fit ​​groove 26, inner groove 27, internal circulation inlet 28, internal circulation outlet 29, pipeline 3, internal circulation channel 4, heat exchange pipe 5, water inlet 51, water outlet 52, temperature sensor 53, flow sensor 54, circulation pump 6, heater 7, external wiring 71, heat storage plate 8, and baffle 9, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A series-panel phase change energy storage water heater, comprising a heat exchange assembly (1) and a heat storage assembly (2), characterized in that, The heat exchange component (1) and the heat storage component (2) are connected separately by a pipeline (3). The heat storage component (2) has an inner circulation channel (4) that is circulated and connected to the heat exchange component (1). The heat storage component (2) is equipped with several heat storage plates (8) for transferring heat and a heater (7) for providing heat to the heat storage plates (8). The inner circulation channel (4) is arranged to flow around the several heat storage plates (8) in sequence. The heater (7) is located in the inner circulation channel (4). The heat exchange component (1) has a heat exchange cavity (11) that is connected to the circulation channel. The heat exchange component (1) is provided with a heat exchange pipe (5) located in the heat exchange cavity (11).

2. A series-panel phase change energy storage water heater according to claim 1, characterized in that, The heat exchange chamber (11) is enclosed by the heat exchange pipe (5), and the heat exchange pipe (5) has an inlet (51) and an outlet (52) extending to the outside of the heat exchange assembly (1) at both ends. A temperature sensor (53) for identifying the temperature of the heat exchange chamber (11) and a flow sensor (54) for identifying the flow rate of the inlet (51) are provided at the inlet (51).

3. A series-panel phase change energy storage water heater according to claim 1, characterized in that, The pipeline (3) is equipped with a circulation pump (6) for driving the internal circulation of liquid in the internal circulation channel (4) and heat exchange chamber (11) to circulate.

4. A series-panel phase change energy storage water heater according to claim 1, characterized in that, The heat storage assembly (2) includes a heat storage box (21) and a cover plate (22) installed on the top of the heat storage box (21). The heat storage box (21) has an internal circulation outlet (29) located at the bottom of the heat storage box (21) and an internal circulation inlet (28) arranged diagonally opposite to the internal circulation outlet (29) along the heat storage box (21). The cover plate (22) has a reserved hole (23) for installing a heater (7). The heater (7) has an external wiring (71) extending to the reserved hole (23) at its end.

5. A series-panel phase change energy storage water heater according to claim 4, characterized in that, The heat storage plate (8) is vertically installed inside the heat storage box (21). The bottom of the heat storage box (21) is provided with a bottom plate (24) for abutting the heat storage plate (8). The heater (7) is suspended inside the heat storage box (21).

6. A series-panel phase change energy storage water heater according to claim 5, characterized in that, Several heat storage plates (8) are arranged in a row, and several heat storage plates (8) are arranged alternately and staggered to form an internal circulation channel (4). The inner wall of the heat storage box (21) has an inner groove (27) that engages with the side of the heat storage plate (8).

7. A series-panel phase change energy storage water heater according to claim 5, characterized in that, Several heat storage plates (8) are arranged in a row, and several baffles (9) are provided in the heat storage box (21) to form an internal circulation channel (4). The several baffles (9) are arranged alternately and staggered in sequence.

8. A series-panel phase change energy storage water heater according to claim 6 or 7, characterized in that, The cover plate (22) has an upper snap-fit ​​groove (25) for snapping the top of the heat storage plate (8), and the bottom plate (24) has a lower snap-fit ​​groove (26) for snapping the bottom of the heat storage plate (8).

9. A series-panel phase change energy storage water heater according to claim 7, characterized in that, The baffle (9) and the heat storage box (21) are an integral structure, and the cover plate (22) has a positioning groove (221) for the positioning baffle (9).

10. A series-panel phase change energy storage water heater according to claim 6 or 7, characterized in that, The heater (7) is provided corresponding to the internal circulation outlet (29).

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