Heat storage device and water heater

Abstract

The utility model relates to a heat storage device and a water heater. The heat storage device comprises a plurality of heat exchange pieces, a first pipeline, a second pipeline and a heat storage piece. The multiple heat exchange pieces are arranged at intervals in the first direction, the space between every two adjacent heat exchange pieces is filled with a heat storage piece, and a first pipeline and a second pipeline are arranged between every two adjacent heat exchange pieces; the first pipeline and the second pipeline are arranged on the surface of the heat exchange piece, and the first pipeline is arranged by being spaced from the second pipeline; and the first pipeline and the second pipeline are both communicated with the heat exchange piece. The heat storage device can reduce connecting ports of pipelines.

Description

Technical Field

[0001] The utility model relates to the field of water heaters, in particular to a heat storage device and a water heater. Background Art

[0002] A thermal storage device uses a specific device to store temporarily unused or excess heat using a specific thermal storage material, releasing it for use when needed. This system is used in heating and air conditioning systems, among other applications. However, current thermal storage devices suffer from inefficient internal structural designs, resulting in complex piping and numerous connections. Utility Model Content

[0003] In view of this, the present invention provides a heat storage device and a water heater, wherein the heat storage device can reduce the connection ports of the pipeline.

[0004] The utility model provides the following technical solution: a heat storage device, comprising: a plurality of heat exchange elements, a first pipe, a second pipe and a heat storage element;

[0005] The plurality of heat exchange elements are spaced apart along the first direction, a heat storage element is filled between two adjacent heat exchange elements, and a first pipe and a second pipe are provided between the two adjacent heat exchange elements;

[0006] The first pipe and the second pipe are arranged on the surface of the heat exchange element, and the first pipe is arranged to be separated from the second pipe; the first pipe and the second pipe are both communicated with the heat exchange element.

[0007] Furthermore, the heat exchange element has a first surface and a second surface opposite to each other, the first surface is provided with a first protrusion, and the second surface is provided with a second protrusion.

[0008] Furthermore, the first protrusion protrudes toward a side away from the second surface, and the second protrusion protrudes toward a side away from the first surface;

[0009] The axis of the first protrusion and the axis of the second protrusion are both inclined to the center line of the heat exchange element; the first protrusion and the second protrusion are arranged to cross each other.

[0010] Furthermore, it also includes: a heating element;

[0011] The heating element is arranged at a position adjacent to the heat storage element, and is used to provide heat to the heat storage element.

[0012] Furthermore, the first pipe and the second pipe between two adjacent heat exchange elements are arranged alternately.

[0013] Furthermore, it also includes: a sealing shell;

[0014] The sealed shell has a water inlet and a water outlet, the water inlet is connected to the first pipe or the second pipe, the water outlet is connected to the second pipe or the first pipe, and the heat exchange element, the first pipe, the second pipe and the heat storage element are all arranged in the sealed shell.

[0015] The utility model also provides a water heater, which comprises:

[0016] body, and the heat storage device.

[0017] Furthermore, the main body includes: a box body, a water inlet pipe, and a water outlet pipe;

[0018] The heat storage device is arranged in the box body, the water inlet pipe is connected to the water inlet, and the water outlet pipe is connected to the water outlet; and a heat insulation layer is arranged on the periphery of the heat storage device.

[0019] Furthermore, it also includes a heating device; the heating device is connected to the water outlet pipe and is used to heat the outlet water.

[0020] Furthermore, it also includes: a controller;

[0021] The controller is disposed in the box, and is connected to the heat storage device and the heating device respectively.

[0022] The above-mentioned heat storage device is provided with a first pipe and a second pipe between multiple heat exchange elements, and the heat exchange elements are connected through the first pipe and the second pipe, wherein the first pipe can be used as a water inlet and the second pipe can be used as a water outlet. Water flows into the heat exchange element through the first pipe. At this time, the heat storage element releases heat to heat the water flow, and the water flow gradually fills all the heat exchange elements. After the water flow fills all the heat exchange elements, the water flow is affected by the water pressure when entering the heat exchange element through the first pipe and is discharged from the second pipe. In this way, the water flow can fully exchange heat in the heat exchange element, thereby improving the adequacy of heat exchange; at the same time, water inlet and outlet of the heat storage device can be realized through the first pipe and the second pipe, and the number of pipes in the heat storage device can also be reduced, and the stability of the heat storage device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the implementation. Obviously, the drawings described below are some implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is one of the structural diagrams of the heat storage device provided in an embodiment of the utility model;

[0025] Figure 2 A cross-sectional view of a heat storage device provided in an embodiment of the present utility model;

[0026] Figure 3 The second structural diagram of the heat storage device provided by the embodiment of the utility model;

[0027] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0028] Figure 5 One of the structural schematic diagrams of the heat exchange element provided in the embodiment of the utility model;

[0029] Figure 6 The second structural diagram of the heat exchanger provided in the embodiment of the present utility model;

[0030] Figure 7 The third structural diagram of the heat exchanger provided in the embodiment of the present utility model;

[0031] Figure 8 This is a schematic structural diagram of a water heater provided in an embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 100-heat storage device; 10-heat exchange element; 11-first surface; 12-first raised portion; 13-second surface; 14-second raised portion; 20-first pipe; 30-second pipe; 40-heat storage element; 50-heating element; 60-sealed shell; 61-water inlet; 62-water outlet; 200-water heater; 210-main body; 220-tank; 230-water inlet pipe; 240-water outlet pipe; 250-heating device; 260-controller; 270-thermal insulation layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The terms "first," "second," and so on, in the specification and claims of this utility model and the accompanying drawings are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0036] References herein to "embodiments" or "implementations" mean that a particular feature, structure, or characteristic described in connection with the embodiments or implementations may be included in at least one embodiment of the present invention. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor do they constitute independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] A thermal storage device uses a specific device to store temporarily unused or excess heat using a specific thermal storage material, releasing it for use when needed. This system is used in heating and air conditioning systems, among other applications. However, current thermal storage devices suffer from inefficient internal structural designs, resulting in complex piping and numerous connections.

[0038] In view of this, the present embodiment provides a heat storage device 100 and a water heater 200 . The heat storage device 100 can reduce the number of connection ports of the pipeline.

[0039] See also Figure 1 and Figure 2 The present invention provides a heat storage device 100, comprising: a plurality of heat exchange elements 10, a first pipe 20, a second pipe 30 and a heat storage element 40;

[0040] The plurality of heat exchange elements 10 are spaced apart along the first direction, a heat storage element 40 is filled between two adjacent heat exchange elements 10, and a first pipe 20 and a second pipe 30 are provided between the two adjacent heat exchange elements 10;

[0041] The first pipe 20 and the second pipe 30 are disposed on the surface of the heat exchange element 10 , with the first pipe 20 spaced apart from the second pipe 30 ; both the first pipe 20 and the second pipe 30 are in communication with the heat exchange element 10 .

[0042] The heat storage device 100 is connected by the first pipe 20 and the second pipe 30 arranged between the plurality of heat exchange pieces 10, and the heat exchange pieces 10 are communicated by the first pipe 20 and the second pipe 30, wherein the first pipe 20 can be used as the water inlet 61, and the second pipe 30 can be used as the water outlet 62. The water flows into the heat exchange pieces 10 through the first pipe 20, at this time, the heat storage piece 40 releases heat to heat the water flow, and the water flow gradually fills all the heat exchange pieces 10. After the water flow fills all the heat exchange pieces 10, the water flow is discharged from the second pipe 30 under the influence of the water pressure of the first pipe 20 into the heat exchange pieces 10. In this way, the water flow can be fully heat exchanged in the heat exchange pieces 10, thereby improving the heat exchange fullness. At the same time, the water inlet and outlet of the heat storage device 100 can be realized through the first pipe 20 and the second pipe 30, and the number of pipes in the heat storage device 100 can be reduced, thereby improving the stability of the heat storage device 100.

[0043] It can be understood that the plurality of heat exchange pieces 10 are arranged along the first direction, that is, arranged from top to bottom as shown in Figure 2 or Figure 3 The heat exchange piece 10 is used for heat conduction. When the water flow is in the heat exchange piece 10, the heat storage piece 40 starts to release heat, and the heat exchange piece 10 absorbs the heat of the heat storage piece 40. When the temperature of the heat exchange piece 10 rises, the water flow in the heat exchange piece 10 can be heated, thereby improving the temperature of the water flow in the heat exchange piece 10. The inside of the heat exchange piece 10 is a hollow structure, and the water flow enters the hollow of the heat exchange piece 10 through the first pipe 20 for heat exchange. The heat exchange piece 10 is made of heat-conducting material, which can improve the heat exchange efficiency of the heat exchange piece 10.

[0044] It can be understood that the first pipe 20 and the second pipe 30 are used to provide water flow to the heat exchange piece 10 or discharge water flow from the heat exchange piece 10. The first pipe 20 can be used as the water inlet pipe 230 or the water outlet pipe 240, and the second pipe 30 can also be used as the water inlet pipe 230 or the water outlet pipe 240. When the first pipe 20 is the water inlet pipe 230, the second pipe 30 is the water outlet pipe 240. When the second pipe 30 is the water inlet pipe 230, the first pipe 20 is the water outlet pipe 240.

[0045] It can be understood that the heat storage piece 40 is a phase change material, which can store heat energy. The phase change material can be heated by the heating piece 50 during off-peak electricity to store energy. When the heat storage device 100 needs to exchange heat, the phase change material releases heat to heat the water flow, thereby improving the economy of the heat storage device 100.

[0046] Please refer to Figures 4 to 7 In some embodiments, the heat exchange piece 10 has opposite first and second surfaces 11 and 13, the first surface 11 is provided with a first protrusion 12, and the second surface 13 is provided with a second protrusion 14.

[0047] It can be understood that the heat exchanger 10 has a first surface 11 and a second surface 13 relative to each other, and a first protrusion 12 is provided on the first surface 11, and a second protrusion 14 is provided on the second surface 13. The first protrusion 12 and the second protrusion 14 can be arranged along the length direction of the heat exchanger 10. The first protrusion 12 and the second protrusion 14 have a guiding function. When water flows into the heat exchanger 10 and fills the heat exchanger 10, the first protrusion 12 and the second protrusion 14 can make the water flow along the first protrusion 12 and the second protrusion 14, so that the water flow in the heat exchanger 10 is more fully mixed, thereby improving the heat exchange effect.

[0048] See also Figures 5 to 7 In some embodiments, the first protrusion 12 protrudes toward a side away from the second surface 13, and the second protrusion 14 protrudes toward a side away from the first surface 11;

[0049] The axis of the first protrusion 12 and the axis of the second protrusion 14 are both inclined to the center line of the heat exchange element 10 ; the first protrusion 12 and the second protrusion 14 are arranged to cross each other.

[0050] It can be understood that the heat exchanger 10 has a first surface 11 and a second surface 13 relative to each other, a first protrusion 12 is provided on the first surface 11, and a second protrusion 14 is provided on the second surface 13; the first protrusion 12 and the second protrusion 14 both form an angle with the central axis of the heat exchanger 10, that is, the first protrusion 12 and the second protrusion 14 are both arranged obliquely to the first surface 11; wherein, the setting directions of the first protrusion 12 and the second protrusion 14 are opposite, that is, the first protrusion 12 is inclined to the left on the first surface 11, and the second protrusion 14 is inclined to the right on the second surface 13.

[0051] It can be understood that the first protrusion 12 and the second protrusion 14 have a diversion function, so the first protrusion 12 and the second protrusion 14 can play a role in mixing water; specifically, when the heat storage device 100 is working, the water flow gradually fills the heat exchange element 10. When the water in the heat exchange element 10 is full, the water flow circulates in the heat exchange element 10 under the influence of water pressure. At this time, the first protrusion 12 and the second protrusion 14 can play a diversion function. The first protrusion 12 and the second protrusion 14 are arranged in a cross shape, so that the water flow located at the first protrusion 12 and the second protrusion 14 can be fully mixed to improve the heat exchange effect of the heat storage device 100.

[0052] In some embodiments, the first pipes 20 and the second pipes 30 between two adjacent heat exchange elements 10 are alternately arranged.

[0053] It can be understood that the first pipe 20 and the second pipe 30 between two adjacent heat exchange elements 10 are staggered, that is, the axes of the first pipe 20 between two adjacent heat exchange elements 10 are not collinear. For example: in the case of three heat exchange elements 10, a first pipe 20 is arranged between the heat exchange elements 10 and the heat exchange elements 10, and the first pipe 20 between the heat exchange elements 10 and the heat exchange elements 10 is arranged at the upper left corner of the heat exchange elements 10. A first pipe 20 is arranged between the heat exchange elements 10 and the heat exchange elements 10, and the first pipe 20 between the heat exchange elements 10 and the heat exchange elements 10 is arranged at the lower right corner of the heat exchange elements 10. In this way, after the water flows into the heat exchange element 10, it can flow through the entire heat exchange element 10, which can slow down the flow rate of the water and enable the water flow to fully contact the heat exchange element 10, thereby improving the heat exchange efficiency of the heat storage device 100.

[0054] See also Figure 2 , in some embodiments, further comprising: a heating element 50;

[0055] The heating element 50 is disposed adjacent to the heat storage element 40 , and is configured to provide heat to the heat storage element 40 .

[0056] It can be understood that the heating element 50 is set at a position where it can provide heat to the heat storage element 40. It needs to be as close to the heat storage element 40 as possible to reduce heat loss. The heating element 50 is used to provide heat to the heat storage element 40. Specifically, when the heating element 50 is working, it generates heat. At this time, the phase change material stores heat.

[0057] Optionally, the phase change material may be sodium acetate trihydrate or paraffin wax, and sodium acetate trihydrate or paraffin wax is prepared by microencapsulation technology, that is, the phase change material is encapsulated in tiny capsules.

[0058] During heat absorption, when the ambient temperature rises to the phase change temperature of the PCM, the PCM inside the capsule begins to absorb heat. The heat is absorbed by the PCM, causing it to transition from a solid to a liquid state, a process known as melting. During this process, the PCM temperature inside the capsule remains relatively constant because the absorbed heat is used to overcome intermolecular forces rather than increase its temperature.

[0059] During heat release, when the ambient temperature drops below the phase change temperature of the PCM, the liquid PCM inside the capsule begins to release heat. This release of heat causes the PCM to transition from liquid to solid, a process known as solidification. Again, the temperature remains relatively constant during this process.

[0060] See also Figure 2 and Figure 3 , in some embodiments, further comprising: a sealing housing 60;

[0061] The sealed shell 60 has a water inlet 61 and a water outlet 62. The water inlet 61 is connected to the first pipe 20 or the second pipe 30, and the water outlet 62 is connected to the second pipe 30 or the first pipe 20. The heat exchange element 10, the first pipe 20, the second pipe 30 and the heat storage element 40 are all arranged in the sealed shell 60.

[0062] It can be understood that the sealed shell 60 has a water inlet 61 and a water outlet 62, wherein the water inlet 61 is connected to the first pipe 20, and the second pipe 30 is connected to the water outlet 62; the heat exchange element 10 and the heat storage element 40 are both arranged in the sealed shell 60 along the width direction of the shell. In order to enable the heat exchange element 10 to better exchange heat, the heat storage element 40 is clamped between two adjacent heat exchange elements 10, which can increase the contact area between the heat storage element 40 and the heat exchange element 10, and can transfer heat to the heat exchange element 10 more evenly, so as to improve the heat exchange efficiency of the heat exchange element 10.

[0063] Optionally, the heating element 50 may be disposed inside the sealed housing 60 or outside the sealed housing 60 .

[0064] Optionally, the phase change material may be disposed around the outer circumference of the heat exchange element 10 .

[0065] It can be understood that the above-mentioned heat exchange element 10, the above-mentioned heating element 50, and the above-mentioned phase change material are all fixedly arranged in the sealed shell 60. The sealed shell 60 can be made of a heat-insulating material or a heat-conductive material, which depends on the position of the heating element 50. Specifically, when the heating element 50 is arranged outside the sealed shell 60, the seal can be made of a heat-conductive material. When the heating element 50 is arranged inside the sealed shell 60, the sealed shell 60 is made of a heat-insulating material.

[0066] See also Figure 8 The present invention further provides a water heater 200, which includes:

[0067] The main body 210 and the heat storage device 100.

[0068] The water heater 200 includes a heat storage device 100 , which can store heat during off-peak hours through the heat storage element 40 in the heat storage device 100 , and then release the heat when water needs to be heated to heat the water, thereby improving the economy of the heater.

[0069] It can be understood that the heat storage device 100 sets a first pipe 20 and a second pipe 30 between multiple heat exchange elements 10, and connects the heat exchange elements 10 through the first pipe 20 and the second pipe 30, wherein the first pipe 20 can be used as a water inlet 61, and the second pipe 30 can be used as a water outlet 62. Water flows into the heat exchange element 10 through the first pipe 20. At this time, the heat storage element 40 releases heat to heat the water flow, and the water flow gradually fills all the heat exchange elements 10. After the water flow fills all the heat exchange elements 10, the water flow is affected by the water pressure when it enters the heat exchange element 10 through the first pipe 20 and is discharged from the second pipe 30. In this way, the water flow can fully exchange heat in the heat exchange element 10, thereby improving the adequacy of heat exchange; at the same time, the water inlet and outlet of the heat storage device 100 can be realized through the first pipe 20 and the second pipe 30, and the number of pipes in the heat storage device 100 can also be reduced, thereby improving the stability of the heat storage device 100.

[0070] See also Figure 8 In some embodiments, the main body 210 includes: a box 220, a water inlet pipe 230, and a water outlet pipe 240;

[0071] The heat storage device 100 is disposed in the box body 220 , the water inlet pipe 230 is connected to the water inlet 61 , and the water outlet pipe 240 is connected to the water outlet 62 ; a heat insulation layer 270 is disposed on the periphery of the heat storage device 100 .

[0072] It can be understood that the above-mentioned water heater 200 also includes a box body 220, and the heat storage device 100 is arranged in the box body 220. No insulation material is provided in the box body 220. The insulation material can further keep the heat storage device 100 warm and reduce the heat loss of the heat storage device 100. In order to provide water to the heat storage device 100, a water inlet pipe 230 and a water outlet pipe 240 are also provided. The water inlet pipe 230 is connected to the water inlet 61 on the sealed shell 60, and the water outlet pipe 240 is connected to the water outlet 62 on the sealed shell 60. Water flow is provided to the heat storage device 100 through the water inlet pipe 230, and the water flow in the heat storage device 100 is discharged through the water outlet pipe 240, so that the water heater 200 heats the water flow.

[0073] See also Figure 8 , in some embodiments, further comprising a heating device 250;

[0074] The heating device 250 is connected to the water outlet pipe 240 and is used to heat the outlet water.

[0075] It can be understood that the heating device 250 is also arranged in the box 220, the heating device 250 is used for secondary heating of the water flow, mainly for the hot water outlet of the water heater 200 to meet the use of the user, for example: the user needs to use 50 DEG C hot water, but the heat storage device 100 can only make the water temperature reach 40 DEG C after heat exchange, so that the user's water demand cannot be met, at this time, the water temperature can reach the required water temperature of the user after the secondary heating of the heating device 250 to the water flow, and the heat of the heat storage member 40 is also consumed after long time use, so that the water temperature of the outlet water is lower, which affects the normal use of the user, therefore, the heating device 250 is arranged to secondary heat the water flow after heat exchange of the heat storage device 100, so that the water temperature can meet the required temperature of the user.

[0076] Please refer to Figure 8 In some embodiments, further comprising: a controller 260;

[0077] The controller 260 is arranged in the box 220, and the controller 260 is connected with the heat storage device 100 and the heating device 250 respectively.

[0078] It can be understood that the temperature sensor is arranged on the water outlet pipe 240 of the heat storage device 100, and the electromagnetic valve is arranged on the water inlet pipe 230 of the heat storage device 100, and the controller 260 is connected with the temperature sensor and the electromagnetic valve respectively; the temperature of the water flow after heat exchange is obtained through the temperature sensor, when the current outlet water temperature is higher than the required water temperature, the electromagnetic valve can be adjusted to increase the water flow to reduce the outlet water temperature, when the current outlet water temperature is lower than the required water temperature, the water flow can be secondary heated by the heating device 250 to reach the preset temperature.

[0079] In the present application, the "embodiment" and "embodiment" mean that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described in the present application can be combined with other embodiments. In addition, it should be understood that the features, structures or characteristics described in each embodiment of the present application can be combined with each other without contradiction, to form another embodiment without departing from the spirit and scope of the present application.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the above preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A heat storage device, characterized in that: include: A plurality of heat exchange elements (10), a first pipe (20), a second pipe (30), and a heat storage element (40); The plurality of heat exchange elements (10) are spaced apart along a first direction, a heat storage element (40) is filled between two adjacent heat exchange elements (10), and a first pipe (20) and a second pipe (30) are provided between the two adjacent heat exchange elements (10); The first pipe (20) and the second pipe (30) are arranged on the surface of the heat exchange element (10), and the first pipe (20) is arranged to be spaced from the second pipe (30); the first pipe (20) and the second pipe (30) are both connected to the heat exchange element (10).

2. The heat storage device according to claim 1, characterized in that The heat exchange element (10) has a first surface (11) and a second surface (13) that are opposite to each other. The first surface (11) is provided with a first protrusion (12), and the second surface (13) is provided with a second protrusion (14).

3. The heat storage device according to claim 2, characterized in that The first protrusion (12) protrudes toward a side away from the second surface (13), and the second protrusion (14) protrudes toward a side away from the first surface (11); The axis of the first protrusion (12) and the axis of the second protrusion (14) are both inclined to the center line of the heat exchange element (10); the first protrusion (12) and the second protrusion (14) are arranged crosswise.

4. The heat storage device according to any one of claims 1 to 3, characterized in that Also includes: a heating element (50); The heating element (50) is arranged at a position adjacent to the heat storage element (40), and the heating element (50) is used to provide heat to the heat storage element (40).

5. The heat storage device according to claim 1, characterized in that The first pipes (20) and the second pipes (30) between two adjacent heat exchange elements (10) are arranged in a staggered manner.

6. The heat storage device according to claim 4, characterized in that Also includes: Sealing housing (60); The sealed housing (60) has a water inlet (61) and a water outlet (62); the water inlet (61) is connected to the first pipe (20) or the second pipe (30); the water outlet (62) is connected to the second pipe (30) or the first pipe (20); the heat exchange element (10), the first pipe (20), the second pipe (30) and the heat storage element (40) are all arranged in the sealed housing (60).

7. A water heater, characterized in that: The water heater (200) comprises: The body (210), and The heat storage device (100) according to any one of claims 1 to 6.

8. The water heater according to claim 7, characterized in that The main body (210) includes: a box (220), a water inlet pipe (230), and a water outlet pipe (240); The heat storage device (100) is arranged in the box (220), the water inlet pipe (230) is connected to the water inlet (61), and the water outlet pipe (240) is connected to the water outlet (62); and a heat insulation layer (270) is provided on the outer periphery of the heat storage device (100).

9. The water heater according to claim 8, characterized in that Also included is a heating device (250); The heating device (250) is connected to the water outlet pipe (240) and is used to heat the outlet water.

10. The water heater according to claim 9, characterized in that Also includes: Controller (260); The controller (260) is disposed in the box (220), and the controller (260) is connected to the heat storage device (100) and the heating device (250) respectively.

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