Energy storage heat exchange type electric water heater

Abstract

The invention relates to the technical field of water heaters, and discloses an energy storage heat exchange type electric water heater which comprises an energy storage container, a heat exchanger and a heater, the energy storage container is filled with multiple energy storage media, and the multiple energy storage media comprise energy storage liquid and at least one phase change material; a circulation channel is arranged in the heat exchanger, an inlet of the circulation channel and an outlet of the circulation channel are both formed in the outer side of the energy storage container, a heat exchange body is further arranged between the inlet of the circulation channel and the outlet of the circulation channel, and the heat exchange body is arranged in the energy storage container. The energy storage medium wraps the heat exchange main body; the heater is arranged in the energy storage container and is used for heating the energy storage liquid; and the energy storage medium can exchange heat with water in the circulation channel. According to the technical scheme, the energy storage efficiency of the energy storage heat exchange type electric water heater is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to an energy storage heat exchange type electric water heater. Background Art

[0002] Storage-type electric water heaters are the mainstream water heaters, which are generally large in size, low in heating efficiency, and require a long waiting time. After the water in the water tank is repeatedly heated, the water quality deteriorates and it is easy to breed bacteria and other microorganisms, which is unsanitary. Phase change water heaters can effectively avoid the above problems compared to storage-type electric water heaters. However, existing phase change water heaters all use phase change materials for direct heating of energy storage. This method has an extremely low heat conversion rate, which seriously affects the heating power and heating efficiency of the phase change water heater. Summary of the invention

[0003] The main purpose of the present invention is to provide an energy storage heat exchange type electric water heater, aiming to improve the energy storage efficiency of the energy storage heat exchange type electric water heater.

[0004] To achieve the above-mentioned object, the energy storage heat exchange electric water heater proposed in the present invention comprises: an energy storage container, wherein the energy storage container is filled with a plurality of energy storage media, wherein the plurality of energy storage media comprises an energy storage liquid and at least one phase change material; A heat exchanger, wherein a circulation channel is provided inside, wherein the inlet and the outlet of the circulation channel are both provided outside the energy storage container, and a heat exchange body is further provided between the inlet and the outlet of the circulation channel, wherein the heat exchange body is provided inside the energy storage container, and the energy storage medium wraps the heat exchange body; A heater, disposed in the energy storage container, and used to heat the energy storage liquid; The energy storage medium can exchange heat with water in the flow channel.

[0005] In one embodiment of the present invention, the heater is disposed at the bottom of the energy storage container.

[0006] In one embodiment of the present invention, the energy storage container has a first direction, and the inlet of the circulation channel and the outlet of the circulation channel are respectively arranged close to two ends of the first direction.

[0007] In one embodiment of the present invention, the energy storage container also has a second direction perpendicular to the first direction, and the heat exchange body includes a plurality of straight line segments and a plurality of bent connecting segments, each of the straight line segments is extended along the second direction, and the plurality of straight line segments are arranged at intervals along the first direction; both ends of two adjacent straight line segments are connected by the bent connecting segment.

[0008] In one embodiment of the present invention, a one-way valve is provided at the inlet of the circulation channel.

[0009] In one embodiment of the present invention, a stop valve is provided at the outlet of the circulation channel.

[0010] In one embodiment of the present invention, the energy storage medium further includes a plurality of energy storage packs, and the energy storage packs include a heat-conductive sealed shell and an inner core disposed in the sealed shell.

[0011] In one embodiment of the present invention, a plurality of the energy storage packs are independently arranged; Or, a plurality of the energy storage packs are arranged in a row; Alternatively, a plurality of the energy storage packs are arranged in a ring shape.

[0012] In one embodiment of the present invention, the energy storage effect of the energy storage pack is greater than the energy storage effect of the energy storage liquid.

[0013] The technical solution of the present invention is to arrange a plurality of energy storage media in the energy storage container, wherein the energy storage medium includes energy storage liquid and at least one phase change material, and to arrange a heater in the energy storage container. The heater does not directly heat the phase change material, but quickly heats the energy storage liquid in the energy storage container through the heater, and transfers the heat to the phase change material through the energy storage liquid. Since the energy storage medium is wrapped on the surface of the heat exchanger, the energy storage medium can transfer the heat to the circulation channel through the surface of the heat exchanger to achieve heat exchange with the water in the circulation channel. Since the heater does not directly heat the phase change material, but heats the energy storage liquid, and transfers the heat to the lower phase change material through the energy storage liquid, the time for the phase change material to complete energy storage is shortened, and the heat storage efficiency of the energy storage medium is improved as a whole. At the same time, since the heater does not directly heat the phase change material, a high-power heater can be used to heat the energy storage liquid in the energy storage container, further improving the heat storage efficiency of the energy storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of an embodiment of an energy storage heat exchange electric water heater of the present invention; Figure 2 It is a schematic diagram of the energy storage state of the energy storage heat exchange electric water heater of the present invention; Figure 3 It is a schematic diagram of the energy release state of the energy storage heat exchange electric water heater of the present invention; Figure 4It is a schematic diagram of the structure of the energy storage package in the energy storage heat exchange electric water heater of the present invention; Figure 5 It is a structural schematic diagram of another embodiment of the energy storage package in the energy storage heat exchange electric water heater of the present invention; Figure 6 It is a structural schematic diagram of another embodiment of the energy storage pack in the energy storage heat exchange electric water heater of the present invention.

[0016] Description of Figure Numbers: 100. Energy storage heat exchange electric water heater; 10. Energy storage container; 11. Energy storage liquid; 13. Energy storage bag; 20. Heat exchanger; 21. Straight segment; 23. Bend connecting segment; 30. Heater. The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] 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 described embodiments 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.

[0018] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Most of the phase change water heaters in the related art directly heat the phase change material used for energy storage. This method has an extremely low heat conversion rate, which seriously affects the heating power and heating efficiency of the phase change water heater.

[0022] The present invention provides an energy storage heat exchange electric water heater 100 .

[0023] Reference Figures 1 to 3 The energy storage heat exchange electric water heater 100 proposed by the present invention comprises an energy storage container 10, wherein the energy storage container 10 is filled with a plurality of energy storage media, wherein the plurality of energy storage media comprises an energy storage liquid 11 and at least one phase change material; The heat exchanger 20 has a circulation channel (not shown) disposed therein, the inlet and the outlet of the circulation channel are both disposed outside the energy storage container 10, and a heat exchange body (not shown) is further disposed between the inlet and the outlet of the circulation channel, the heat exchange body is disposed in the energy storage container 10, and the energy storage medium wraps the heat exchange body; A heater 30 is disposed in the energy storage container 10, and the heater 30 is used to heat the energy storage liquid 11; The energy storage medium can exchange heat with water in the flow channel.

[0024] The technical solution of the present invention adopts a plurality of energy storage media arranged in the energy storage container 10, wherein the energy storage medium includes an energy storage liquid 11 and at least one phase change material, and a heater 30 is arranged in the energy storage container 10. The heater 30 does not directly heat the phase change material, but quickly heats the energy storage liquid 11 in the energy storage container through the heater 30, and transfers the heat to the phase change material through the energy storage liquid 11. Since the energy storage medium is wrapped on the surface of the heat exchanger 20, the energy storage medium can transfer heat to the circulation channel through the surface of the heat exchanger 20 to achieve heat exchange with the water in the circulation channel. Since the heater 30 does not directly heat the phase change material, but heats the energy storage liquid 11, and transfers the heat to the lower phase change material through the energy storage liquid 11, the time for the phase change material to complete energy storage is shortened, and the heat storage efficiency of the energy storage medium is improved as a whole. At the same time, since the heater 30 does not directly heat the phase change material, a high-power heater 30 can be used to heat the energy storage liquid 11 in the energy storage container 10, further improving the heat storage efficiency of the energy storage medium.

[0025] The energy storage container 10 can be an energy storage box, an energy storage tank, or an energy storage barrel. The shape and volume of the energy storage container 10 can be reasonably designed according to the requirements of energy storage. The interior of the energy storage container 10 can be insulated from the outside to reduce the heat exchange between the energy storage medium inside the energy storage container 10 and the outside air, so as to increase the duration of energy storage.

[0026] The heater 30 may be a flow-through heater 30, which is used to heat the energy storage liquid 11 in contact with the heater 30, so that the energy storage liquid 11 is heated quickly. The heater 30 may also be other types of heaters 30, such as an indium tin oxide heater 30.

[0027] The energy storage medium inside the energy storage container 10 includes an energy storage liquid 11 and a phase change material, wherein the phase change material can be an organic phase change material, such as paraffin, fatty acids and their esters, and polyol phase change materials; the phase change material can also be an inorganic phase change material, such as crystalline hydrated salts, molten salts, metal alloys, etc. The energy storage medium can also include a composite phase change material, such as a mixture of organic and inorganic phase change materials. This type of material can combine the advantages of both to improve energy storage efficiency and thermal conductivity. As long as the medium can meet the heat storage and heat release requirements of the energy storage heat exchange electric water heater 100 in this application, the types of energy storage media will not be listed one by one here.

[0028] The energy storage medium inside the energy storage container 10 also includes an energy storage liquid 11. In one embodiment, the phase change material can be directly immersed in the energy storage liquid 11. In another embodiment, the phase change material can also be formed into a plurality of energy storage bags 13, and the plurality of energy storage bags 13 are immersed in the energy storage liquid 11. In this embodiment, the energy storage liquid 11 can be water, which has good thermal conductivity, and has a large specific heat capacity, and can store a lot of heat. At the same time, the cost of water is low and it is easy to obtain. Of course, the energy storage liquid 11 can also be selected from other liquids, such as salt solutions or other liquids. It can be understood that the energy storage liquid 11 can better contact the heat exchanger 20. Compared with the energy storage bag 13, it increases the contact area with the heat exchanger 20, thereby improving the efficiency of heat conduction. In this embodiment, a plurality of energy storage bags 13 are immersed in the energy storage liquid 11, so that the heat in the energy storage bag 13 can also be quickly transferred to the heat exchanger 20 via the energy storage bag 13 and the energy storage liquid 11, thereby achieving rapid and uniform heat exchange.

[0029] Please refer to Figure 1 In one embodiment of the present invention, the heater 30 is disposed at the bottom of the energy storage container 10. In the embodiment of the present invention, the heated hot water flows from the bottom to the top according to the same principle as the water storage electric water heater. Similarly, the heated energy storage liquid 11 also has the characteristic of flowing upward. Therefore, by arranging the heater 30 at the bottom of the energy storage container 10, it is more conducive to heating the energy storage liquid 11 and at the same time facilitates the energy storage liquid 11 to store more heat.

[0030] Please refer to Figure 1 In one embodiment of the present invention, the energy storage container 10 has a first direction, and the inlet of the circulation channel and the outlet of the circulation channel are respectively arranged near the two ends of the first direction. In this embodiment, the first direction is the length direction of the energy storage container 10. By arranging the inlet of the circulation channel and the outlet of the circulation channel near the two ends of the first direction, the heat exchanger 20 can be extended in the energy storage container 10. The water in the circulation channel flows through the heat exchanger 20 for a longer time, thereby increasing the heat exchange time between the water in the circulation channel and the energy storage medium to ensure sufficient heat exchange.

[0031] Please refer to Figure 1 In one embodiment of the present invention, the energy storage container 10 further has a second direction perpendicular to the first direction, the heat exchange body includes a plurality of straight segment bodies 21 and a plurality of bent connecting segments 23, each of the straight segment bodies 21 is extended along the second direction, and the plurality of straight segment bodies 21 are arranged at intervals along the first direction; both ends of two adjacent straight segment bodies 21 are connected by the bent connecting segment 23.

[0032] In the technical solution of this embodiment, the first direction of the energy storage container 10 is the length direction, the second direction is the height direction, and the second direction may also be the width direction, which is not limited here. By setting the heat exchange main body as a plurality of straight segments 21 and bent connecting segments 23 connected in sequence, the length of the heat exchange main body can be further extended, thereby extending the time for water to flow through the heat exchanger 20, thereby increasing the heat exchange time between the water in the circulation channel and the energy storage medium, so as to ensure sufficient heat exchange and improve the heat exchange effect. It should be noted that the length of the straight segments 21 located at both ends of the first direction is longer, and both of the two straight segments 21 have one end extending out of the outside of the energy storage container 10 and connected to the external pipeline. In the entire heat exchange main body, the number of straight segments 21 is one more than the number of bent connecting segments 23, so that the inlet and outlet of the circulation channel are located on the same side of the energy storage container 10, so as to facilitate the installation of pipelines and improve the convenience of installation.

[0033] In one embodiment of the present invention, a one-way valve is provided at the inlet of the circulation channel. In one embodiment of the present invention, a stop valve is provided at the outlet of the circulation channel.

[0034] In the technical solution of this embodiment, the water in the circulation channel is bathing water. A one-way valve is provided at the inlet of the circulation channel, and a stop valve is provided at the outlet of the circulation channel to control the on-off of the circulation channel. It can be understood that the inlet of the circulation channel is connected to tap water through a pipeline, and the water flowing into the inlet is cold water, and the outlet of the circulation channel is connected through a pipeline, and the water flowing out of the outlet of the circulation channel is hot water. In one embodiment, the water flow rate in the circulation channel can also be controlled by setting a pump body.

[0035] Reference Figure 1 and Figure 4 In one embodiment of the present invention, the energy storage medium further includes a plurality of energy storage packages 13, and the energy storage package 13 includes a heat-conductive sealed shell and an inner core disposed in the sealed shell.

[0036] In one embodiment of the present application, by setting the energy storage medium in the form of an energy storage package 13, the application and transfer of the energy storage medium can be facilitated, and the thermal stability or chemical stability of the energy storage material, environmental impact, cost, safety, and the operating temperature and pressure of the system are comprehensively considered to improve the efficiency and reliability of thermal energy storage.

[0037] Specifically, each energy storage pack 13 includes a sealed shell, which is made of a material with good thermal conductivity. The sealed shell can protect the inner core so that the inner core has good thermal stability or chemical stability to ensure the reliability of the heat storage medium. The sealed shell can not only seal the inner core so that it does not directly contact the energy storage liquid 11, but also realize heat transfer between the energy storage liquid 11 and the inner core through the sealed shell. It can be understood that the inner core is mainly a phase change material.

[0038] In one embodiment of the present invention, a plurality of the energy storage packs 13 are independently arranged; Or, a plurality of the energy storage packs 13 are arranged in a row; Alternatively, a plurality of the energy storage packs 13 are arranged in a ring shape.

[0039] Reference Figure 5 In one embodiment, each energy storage pack 13 is independently arranged, and such energy storage pack 13 has high flexibility. Of course, in order to facilitate installation and fixing, the energy storage packs 13 can also be arranged in rows.

[0040] Or, refer to Figure 6 In one embodiment, a plurality of the energy storage packs 13 are arranged in a ring shape, such as Figure 6 As shown, the purpose of such a configuration is to arrange the energy storage packages 13 neatly, and it is also beneficial to increase the number of energy storage packages 13 contained in a unit volume.

[0041] In one embodiment of the present invention, the energy storage effect of the energy storage pack 13 is greater than the energy storage effect of the energy storage liquid 11 .

[0042] In one embodiment of the present invention, the energy storage effect of the energy storage pack 13 is greater than the energy storage effect of the energy storage liquid 11. It can be understood that the energy storage effect of the energy storage pack 13 is greater than the energy storage effect of the energy storage liquid 11 means that the energy storage performance of the energy storage pack 13 is better than that of water of the same volume.

[0043] In one embodiment, the phase change material may not be set as the energy storage package 13 to reduce the cost of its processing. In this case, the phase change material is directly filled in the energy storage container 10 in a non-packaged form. In a specific embodiment, the phase change material is filled in the energy storage container 10 and is in bulk. Such a phase change material has a large contact area with the heat exchanger 20, which is also conducive to improving the efficiency of heat exchange, thereby improving the efficiency of energy storage.

[0044] In the solution of the present application, an energy storage container 10 is provided, and an energy storage medium is filled in the energy storage container 10. The energy storage medium is a mixture of water and an energy storage pack 13. The energy storage effect of the energy storage pack 13 is greater than that of water, thereby increasing the total amount of energy stored in the energy storage tank; and a heater 30 and a heat exchanger 20 are provided in the energy storage container 10. In the energy storage state, the water in the energy storage container 10 is quickly heated by the heater 30, and the hot water transfers the heat to the phase change material in the energy storage pack 13; in the energy release state, the phase change material in the energy storage pack 13 transfers the heat to the energy storage liquid 11, and the energy storage liquid 11 then transfers the heat to the bathing water in the heat exchanger 20; or, in the energy release state, the energy storage liquid 11 directly transfers the heat to the bathing water in the heat exchanger 20, thereby achieving heating of the bathing water.

[0045] In the solution of the present application, the heater 30 directly heats the energy storage liquid 11, avoiding the heater 30 from directly heating the phase change material, achieving rapid energy storage of the phase change material, and also solving the problem that the high-power heater 30 cannot directly heat the phase change material. The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An energy storage heat exchange electric water heater, characterized in that: include: An energy storage container (10), wherein the energy storage container (10) is filled with a plurality of energy storage media, wherein the plurality of energy storage media include an energy storage liquid (11) and at least one phase change material; A heat exchanger (20) having a circulation channel therein, wherein an inlet of the circulation channel and an outlet of the circulation channel are both arranged outside the energy storage container (10), and a heat exchange body is further arranged between the inlet of the circulation channel and the outlet of the circulation channel, wherein the heat exchange body is arranged inside the energy storage container (10), and the energy storage medium is arranged to wrap the heat exchange body; A heater (30) is disposed in the energy storage container (10), and the heater (30) is used to heat the energy storage liquid (11); The energy storage medium can exchange heat with water in the flow channel.

2. The energy storage heat exchange electric water heater according to claim 1, characterized in that: The heater (30) is arranged at the bottom of the energy storage container (10).

3. The energy storage heat exchange electric water heater according to claim 1, characterized in that: The energy storage container (10) has a first direction, and the inlet of the circulation channel and the outlet of the circulation channel are respectively arranged close to two ends of the first direction.

4. The energy storage heat exchange electric water heater according to claim 3, characterized in that: The energy storage container (10) further has a second direction perpendicular to the first direction, the heat exchange body comprises a plurality of straight segment bodies (21) and a plurality of bent connecting segments (23), each of the straight segment bodies (21) is extended along the second direction, and the plurality of straight segment bodies (21) are arranged at intervals along the first direction; both ends of two adjacent straight segment bodies (21) are connected via the bent connecting segment (23).

5. The energy storage heat exchange electric water heater according to claim 1, characterized in that: A one-way valve is provided at the inlet of the circulation channel.

6. The energy storage heat exchange electric water heater according to claim 5, characterized in that: The outlet of the circulation channel is provided with a stop valve.

7. The energy storage heat exchange electric water heater according to any one of claims 1 to 6, characterized in that: The energy storage medium further comprises a plurality of energy storage packages (13), wherein the energy storage package (13) comprises a heat-conductive sealed shell and an inner core arranged in the sealed shell.

8. The energy storage heat exchange electric water heater according to claim 7, characterized in that: A plurality of the energy storage packs (13) are independently arranged; Or, a plurality of the energy storage packs (13) are arranged in a row; Alternatively, a plurality of the energy storage packs (13) are arranged in a ring shape.

9. The energy storage heat exchange electric water heater according to claim 7, characterized in that: The energy storage effect of the energy storage pack (13) is greater than the energy storage effect of the energy storage liquid (11).

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