Energy storage heat exchange type electric water heater

Abstract

The invention relates to the technical field of water heaters. The invention discloses an energy storage heat exchange type electric water heater which comprises an energy storage container, a heat exchanger, a circulating pipeline and a heater, and the energy storage container is filled with at least one energy storage medium; the heat exchanger is arranged in the energy storage container, and the energy storage medium wraps the heat exchanger; the circulating pipeline is connected with the heat exchanger, and part of the circulating pipeline is arranged on the outer side of the energy storage container; the heater is arranged on the circulating pipeline, and the heater is used for heating fluid in the circulating pipeline; the energy storage medium can exchange heat with fluid flowing into the heat exchanger. 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] In the related art, mainstream water heaters include storage-type electric water heaters, which are bulky, slow to heat, and require a long waiting time. After the water stored 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 directly heat the phase change material used for energy storage. This method has a low heat conversion rate, which also leads to problems such as low heating power and slow heating efficiency of existing phase change water heaters. 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 object, the energy storage heat exchange electric water heater proposed by the present invention comprises: An energy storage container, wherein the energy storage container is filled with at least one energy storage medium; A heat exchanger is disposed in the energy storage container, and the energy storage medium is disposed to wrap the heat exchanger; A circulation pipeline connected to the heat exchanger, and part of the circulation pipeline is arranged outside the energy storage container; A heater, disposed on the circulation pipeline, and used to heat the fluid in the circulation pipeline; The energy storage medium is capable of exchanging heat with the fluid flowing into the heat exchanger.

[0005] In one embodiment of the present invention, the energy storage medium 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.

[0006] 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.

[0007] In one embodiment of the present invention, the energy storage medium further includes an energy storage liquid, and a plurality of energy storage packs are immersed in the energy storage liquid.

[0008] 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.

[0009] In one embodiment of the present invention, the energy storage medium comprises a phase change material in a non-packaged form.

[0010] In one embodiment of the present invention, a water inlet and a water outlet are respectively provided at both ends of the circulation pipeline, and a circulation pump is provided between the water inlet and the water outlet, and the circulation pump drives the fluid to flow in the circulation pipeline.

[0011] In one embodiment of the present invention, a first one-way valve is further provided on the circulation pipeline, and the first one-way valve is provided downstream of the heater. In the energy storage state, the first one-way valve allows the liquid in the circulation pipeline to flow into the energy storage container in one direction.

[0012] In one embodiment of the present invention, the heater is disposed close to the water outlet.

[0013] In one embodiment of the present invention, a second one-way valve is provided at the water inlet, and a stop valve is provided at the water outlet.

[0014] The technical solution of the present invention is to set at least one energy storage medium in the energy storage container and set a heater on the circulation pipeline. The heater does not directly heat the energy storage medium, but quickly heats the fluid in the circulation pipeline through the heater. When the heated fluid flows through the heat exchanger, since the energy storage medium is wrapped on the surface of the heat exchanger, the heat exchanger can quickly transfer the heat to the energy storage medium, thereby shortening the time for the heat storage medium to complete energy storage and improving the heat storage efficiency of the energy storage medium. At the same time, since the heater does not directly heat the energy storage medium, a high-power heater can be used to heat the fluid in the circulation pipeline, further improving the heat storage efficiency of the energy storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] 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 4 It 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 package in the energy storage heat exchange electric water heater of the present invention; Figure 7 It is a structural schematic diagram of another embodiment of the energy storage heat exchange electric water heater of the present invention.

[0017] Description of Figure Numbers: 10. Energy storage container; 11. Energy storage bag; 13. Energy storage liquid; 20. Heat exchanger; 30. Circulation pipeline; 31. First section; 32. Second section; 33. Water inlet; 34. Water outlet; 35. Heater; 36. Circulation pump; 37. First one-way valve; 38. Second one-way valve; 39. Stop valve.

[0018] 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

[0019] 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.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] 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.

[0022] 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.

[0023] The invention provides an energy storage heat exchange type electric water heater.

[0024] Reference Figures 1 to 3 In the energy storage heat exchange electric water heater of the present invention, it includes: an energy storage container 10, a heat exchanger 20, a circulation pipeline 30 and a heater 35, the energy storage container 10 is filled with at least one energy storage medium; the heat exchanger 20 is arranged in the energy storage container 10, and the energy storage medium wraps the heat exchanger 20; the circulation pipeline 30 is connected to the heat exchanger 20, and part of the circulation pipeline 30 is arranged on the outside of the energy storage container 10; the heater 35 is arranged on the circulation pipeline 30, and the heater 35 is used to heat the fluid in the circulation pipeline 30; the energy storage medium can exchange heat with the fluid flowing into the heat exchanger 20.

[0025] The technical solution of the present invention is to set at least one energy storage medium in the energy storage container 10, and to set a heater 35 on the circulation pipeline 30. The heater 35 does not directly heat the energy storage medium, but quickly heats the fluid in the circulation pipeline 30 through the heater 35. When the heated fluid flows through the heat exchanger 20, since the energy storage medium is wrapped on the surface of the heat exchanger 20, the heat exchanger 20 can quickly transfer heat to the energy storage medium, thereby shortening the time for the heat storage medium to complete energy storage and improving the heat storage efficiency of the energy storage medium. At the same time, since the heater 35 does not directly heat the energy storage medium, a high-power heater 35 can be used to heat the fluid in the circulation pipeline 30, further improving the heat storage efficiency of the energy storage medium.

[0026] The heater 35 may be a flow-through heater 35, which is used to heat the water flowing through it so that the water temperature rises quickly. The heater 35 may also be other types of heaters 35, such as an indium tin oxide heater 35.

[0027] 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.

[0028] The energy storage medium inside the energy storage container 10 can be a phase change material (PCM), 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 energy storage medium can also be an inorganic phase change material, such as crystalline hydrated salts, molten salts, metal alloys, etc. The energy storage medium can also be a composite phase change material, such as a mixture of organic and inorganic phase change materials. Such materials 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 in this application, the types of energy storage media are not listed one by one here.

[0029] Please refer to Figures 4 to 6 In one embodiment of the present invention, the energy storage medium includes a plurality of energy storage packages 11, and the energy storage package 11 includes a heat-conductive sealed shell (not shown) and an inner core (not shown) disposed in the sealed shell.

[0030] In one embodiment of the present application, by setting the energy storage medium in the form of an energy storage package 11, 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.

[0031] Specifically, each energy storage pack 11 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 13, but also realize heat transfer between the energy storage liquid 13 and the inner core through the sealed shell. It can be understood that the inner core is mainly a phase change material.

[0032] In one embodiment, each energy storage pack 11 is independently arranged, and such energy storage pack 11 has high flexibility. Of course, in order to facilitate installation and fixing, the energy storage pack 11 can also be arranged in a row, such as Figure 5 Alternatively, a plurality of energy storage packs 11 are arranged in a ring shape, as shown in FIG. Figure 6 As shown, the purpose of such a configuration is to arrange the energy storage packages 11 neatly, and it is also beneficial to increase the number of energy storage packages 11 accommodated in a unit volume.

[0033] Please refer to Figure 1In one embodiment of the present invention, the energy storage medium also includes an energy storage liquid 13, and several energy storage packs 11 are immersed in the energy storage liquid 13. In this embodiment, the energy storage liquid 13 can be water. Water has good thermal conductivity, and water has a large specific heat capacity and can store a lot of heat. At the same time, water has a low cost and is easy to obtain. Of course, the energy storage liquid 13 can also be other liquids, such as salt solutions or other liquids. It can be understood that the energy storage liquid 13 can better contact with the heat exchanger 20. Compared with the energy storage pack 11, it increases the contact area with the heat exchanger 20, thereby improving the efficiency of heat conduction. In this embodiment, several energy storage packs 11 are immersed in the energy storage liquid 13, so that the liquid in the circulation pipeline 30 can also be quickly transferred to the energy storage pack 11 via the heat exchanger 20 and the energy storage liquid 13, thereby achieving rapid and uniform heat exchange.

[0034] In one embodiment of the present invention, the energy storage effect of the energy storage pack 11 is greater than the energy storage effect of the energy storage liquid 13. It can be understood that the energy storage effect of the energy storage pack 11 is greater than the energy storage effect of the energy storage liquid 13 means that the energy storage performance of the energy storage pack 11 is better than that of water of the same volume.

[0035] In one embodiment, the energy storage medium may not be configured as the energy storage package 11 to reduce the processing cost. In this case, the energy storage medium is directly filled in the energy storage container 10 in a non-packaged form. In a specific embodiment, the energy storage medium is a phase change material in bulk state filled in the energy storage container 10. 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.

[0036] Please refer to Figures 1 to 3 In one embodiment of the present invention, a water inlet 33 and a water outlet 34 are respectively provided at both ends of the circulation pipeline 30, and a circulation pump 36 is provided between the water inlet 33 and the water outlet 34, and the circulation pump 36 drives the fluid to flow in the circulation pipeline 30. In this embodiment, the circulation pump 36 provides a driving force for the fluid in the circulation pipeline 30, so that the liquid in the pipeline flows quickly, thereby achieving fast and uniform heat exchange.

[0037] It can be understood that the fluid in the circulation pipeline 30 is water, which is bathing water.

[0038] Usually, valve bodies are provided at the water inlet 33 and the water outlet 34 to control the on-off of the circulation pipeline 30. A second one-way valve 38 is provided at the water inlet 33, and a stop valve 39 is provided at the water outlet 34. By providing the second one-way valve 38 at the water inlet 33, water in the pipeline flows into the circulation pipeline 30 in one direction, thereby preventing the water from flowing back after heat exchange. By providing the stop valve 39 at the water outlet 34, when the stop valve 39 is closed, the energy storage heat exchange electric water heater is in an energy storage state.

[0039] Reference Figure 2 , the black arrow in the figure indicates the flow direction of water in the circulation pipeline 30. At this time, cold water flows into the circulation pipeline 30 through the water inlet 33, flows to the inside of the energy storage tank first, flows through the heater 35, and then flows out of the energy storage container 10. Before flowing through the water outlet 34, the cold water enters the heater 35 in the circulation pipeline 30 for heating. After heating in the heater 35, it flows into the heat exchanger 20 to exchange heat with the heat storage medium in the energy storage tank. At this time, the heat flows from the hot water in the pipeline to the heat exchanger 20, the energy storage liquid 13, and the energy storage bag 11 in sequence, thereby realizing rapid energy storage.

[0040] Correspondingly, when the stop valve 39 is opened, the energy storage heat exchange electric water heater is in an energy release state. Figure 3 , the black arrow in the figure indicates the flow direction of water in the circulation pipeline 30. At this time, cold water flows into the circulation pipeline 30 through the water inlet 33, flows to the inside of the energy storage tank, exchanges heat with the heat exchanger 20, and flows out through the water outlet 34. At this time, heat flows from the energy storage pack 11 and / or the energy storage liquid 13 to the heat exchanger 20, causing the water in the heat exchanger 20 to heat up and then flow out through the water outlet 34. At this time, the energy storage medium is in an energy release state.

[0041] In one embodiment of the present invention, a first one-way valve 37 is further provided on the circulation pipeline 30. The first one-way valve 37 is arranged downstream of the heater 35. In the energy storage state, the first one-way valve 37 allows the liquid in the circulation pipeline 30 to flow into the energy storage container 10 in one direction.

[0042] Please continue to refer to Figure 3 In this embodiment, the circulation pipeline 30 includes a first segment 31 and a second segment 32 connected to each other, wherein the first segment 31 is arranged inside the energy storage container 10, the second segment 32 is arranged outside the energy storage tank, and the circulation pump 36 is arranged on the second segment 32 to facilitate the installation and maintenance of the circulation pump 36. In one embodiment, the heater 35 is arranged downstream of the circulation pump 36, and a first one-way valve 37 is also arranged downstream of the heater 35, so that the water flowing through the heater 35 can only flow into the energy storage container 10 in one direction, thereby realizing heating and energy storage of the energy storage medium.

[0043] Please refer to Figure 7 In one embodiment of the present invention, the heater 35 is disposed near the water outlet 34. In this embodiment, the heater 35 is disposed near the water outlet 34 means that the heater 35 is disposed upstream of the water outlet 34, so that when the stop valve 39 is opened to use shower water, the water in the circulation pipeline 30 is first heated by the energy storage medium and then heated by the heater 35, so that the water flowing out of the water outlet 34 can be ensured to have a higher temperature.

[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 11. The energy storage effect of the energy storage pack 11 is greater than the energy storage effect of water, thereby increasing the total amount of energy stored in the energy storage tank. A heat exchanger 20 is provided in the energy storage container 10, and a water pipeline, a heat exchanger 20 and a heater 35 are connected through a circulation pipeline 30. The heater 35 can heat the water in the pipeline, so that the heated water flows into the energy storage tank again, and indirectly heats the energy storage medium, so that the energy storage medium can quickly store energy. At the same time, the problem that the high-power heater 35 cannot directly heat the phase change material is solved. 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 at least one energy storage medium; A heat exchanger (20) is arranged in the energy storage container (10), and the energy storage medium is arranged to wrap the heat exchanger (20); A circulation pipeline (30) connected to the heat exchanger (20), and a portion of the circulation pipeline (30) is arranged outside the energy storage container (10); A heater (35) is disposed on the circulation pipeline (30), and the heater (35) is used to heat the fluid in the circulation pipeline (30); The energy storage medium can exchange heat with the fluid flowing into the heat exchanger (20).

2. The energy storage heat exchange electric water heater according to claim 1, characterized in that: The energy storage medium comprises a plurality of energy storage packs (11), and the energy storage packs (11) comprise a heat-conductive sealed shell and an inner core arranged in the sealed shell.

3. The energy storage heat exchange electric water heater according to claim 2, characterized in that: A plurality of the energy storage packs (11) are independently arranged; Or, a plurality of the energy storage packs (11) are arranged in a row; Alternatively, a plurality of the energy storage packs (11) are arranged in a ring shape.

4. The energy storage heat exchange electric water heater as claimed in claim 2, characterized in that: The energy storage medium further comprises an energy storage liquid (13), and the plurality of energy storage packs (11) are immersed in the energy storage liquid (13).

5. The energy storage heat exchange electric water heater according to claim 4, characterized in that: The energy storage effect of the energy storage pack (11) is greater than the energy storage effect of the energy storage liquid (13).

6. The energy storage heat exchange electric water heater according to claim 1, characterized in that: The energy storage medium also includes a phase change material in an unpackaged form.

7. The energy storage heat exchange electric water heater according to any one of claims 1 to 6, characterized in that: A water inlet (33) and a water outlet (34) are respectively provided at both ends of the circulation pipeline (30), and a circulation pump (36) is provided between the water inlet (33) and the water outlet (34), wherein the circulation pump (36) drives the fluid to flow in the circulation pipeline (30).

8. The energy storage heat exchange electric water heater according to claim 7, characterized in that: The circulation pipeline (30) is also provided with a first one-way valve (37), which is arranged downstream of the heater (35). In the energy storage state, the first one-way valve (37) allows the liquid in the circulation pipeline (30) to flow into the energy storage container (10) in a one-way manner.

9. The energy storage heat exchange electric water heater according to claim 7, characterized in that: The heater (35) is arranged close to the water outlet (34).

10. The energy storage heat exchange electric water heater according to claim 7, characterized in that: A second one-way valve (38) is provided at the water inlet (33), and a stop valve (39) is provided at the water outlet (34).

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