Phase change electric water heater

Abstract

The utility model discloses a phase change electric water heater which comprises a liquid storage bin, a heat exchange device, a heating device and a water pipe, the liquid storage bin is filled with liquid heat-conducting media, the heat exchange device is filled with phase change materials, and the heat exchange device exchanges heat with the liquid heat-conducting media. The heating device is used for heating the liquid heat-conducting medium or / and the phase-change material, the water pipe penetrates through the liquid heat-conducting medium, liquid stored in the water heater with the structure only contains the liquid heat-conducting medium, and compared with the prior art that flowing new water enters the water heater all the time, the heating device is used for heating the liquid heat-conducting medium or / and the phase-change material; according to the water heater, the water scale generation amount can be greatly reduced, so that the phenomenon that the water heater is damaged due to the water scale is greatly reduced, and the service life of the water heater is prolonged.

Description

Technical Field

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

[0002] A water heater is a device that uses various physical principles to increase the temperature of cold water into hot water within a certain period of time. Ordinary electric water heaters in the prior art have a small water mixing volume and a large volume. In addition, some storage-type electric water heaters heat water inside the heater, which will produce scale during the heating process. In addition, the scale produced during long-term use will cause the water quality to deteriorate and even cause blockage, affecting the normal use of the water heater.

[0003] Currently, small-volume phase-change electric water heaters are used. However, since new tap water is constantly flowing through the heating device and the water pump, more impurities will accumulate over a long period of time, causing a certain impact on the internal components of the water heater. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides a phase change electric water heater, which can solve the problem that a large amount of impurities inside the water heater affects the service life of the water heater.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A phase change electric water heater, comprising:

[0007] A liquid storage bin, wherein the liquid storage bin is filled with a liquid heat-conducting medium;

[0008] A heat exchange device, wherein the heat exchange device is filled with a phase change material and exchanges heat with the liquid heat conducting medium;

[0009] A heating device, the heating device is used to heat the liquid heat-conducting medium and / or the phase change material;

[0010] A water pipe is arranged through the liquid heat-conducting medium.

[0011] By adopting the above solution, the liquid stored in the water heater is only liquid heat transfer medium. Compared with the prior art where new water is constantly flowing in, the amount of scale generated will be greatly reduced, and the normal use of the water heater will not be affected by a very small amount of scale.

[0012] Furthermore, the heat exchange device is in contact with the liquid heat-conducting medium, and the heating device is at least partially in contact with the liquid heat-conducting medium.

[0013] Furthermore, the water pipe is provided with a heat extraction structure.

[0014] By adopting the above solution, the heat extraction structure can increase the rate of heat exchange between the water pipe and the liquid heat-conducting medium, thereby ensuring that the water pipe can achieve a better heating effect on the water in the water pipe in the smallest possible space.

[0015] Furthermore, fins are provided on the outer surface of the water pipe to form a heat extraction structure.

[0016] By adopting the above solution, the fins can increase the contact area between the water pipe and the liquid heat-conducting medium, thereby increasing the heat exchange rate of the water pipe and further increasing the heating efficiency of the water in the water pipe.

[0017] Furthermore, the water pipe is spirally or S-shapedly bent to form a heat extraction structure, or a plurality of water pipes are provided and arranged in an array structure to form a heat extraction structure.

[0018] By adopting the above scheme, spiral or S-shaped bends are used in the water pipe to increase the time that water passes through the water pipe and the contact area between the water pipe and the liquid heat-conducting medium, thereby increasing the time that the water in the water pipe is heated by the water pipe, thereby increasing the temperature, or multiple water pipes are provided and arranged in an array, thereby increasing the heat exchange efficiency between the water pipe and the liquid heat-conducting medium.

[0019] Furthermore, the heat exchange device is a heat exchange pipeline, the phase change material is filled in the heat exchange pipeline, and the heat exchange pipeline is arranged in the liquid storage tank in a straight line or in a curved coil.

[0020] By adopting the above solution, the heat exchange device adopts a straight tube design or a coil design, thereby improving the heat exchange efficiency between the heat exchange device and the liquid heat transfer medium.

[0021] Furthermore, the heat exchange device is a heat exchange pipeline, the phase change material is filled in the heat exchange pipeline, and there are multiple heat exchange pipelines, which are arranged side by side or staggered in the liquid storage tank.

[0022] By adopting the above solution, the heat exchange device adopts a multiple parallel or staggered design to improve the heat exchange efficiency between the heat exchange device and the liquid heat transfer medium.

[0023] Furthermore, it also includes a water pump, which has a liquid outlet and a liquid inlet, and the liquid outlet and the liquid inlet are both connected to the liquid storage tank to mix the liquid heat-conducting medium in the liquid storage tank.

[0024] By adopting the above solution, the water pump can accelerate the mixing of the liquid heat-conducting medium in the liquid storage tank, so that the temperature of the liquid heat-conducting medium in the liquid storage tank is more uniform.

[0025] Furthermore, the water pump is arranged in the liquid storage tank.

[0026] By adopting the above solution, since the liquid heat-conducting medium only participates in the circulation inside the liquid storage tank, the liquid heat-conducting medium has only a few impurities and will not affect the water pump or produce scale. Therefore, placing the water pump in the liquid storage tank not only does not affect the normal service life of the water pump, but also improves the integrity of the water heater.

[0027] Furthermore, the heating device and the water pump are both arranged near the water pipe.

[0028] By adopting the above scheme, since the temperature of the liquid heat-conducting medium at the heating device is often higher than the temperature of the liquid heat-conducting medium far away from the heating device during the heating process, the water pump is arranged at the heating device to improve the heat exchange efficiency. Similarly, since the temperature of the liquid heat-conducting medium at the heating device is relatively high, the heating device is arranged close to the water pipe to improve the heating efficiency of the water in the water pipe.

[0029] Furthermore, the water pipe is made of a transparent material, and is disposed on one side of the liquid storage tank. The liquid storage tank is provided with a transparent observation window at the location where the water pipe passes.

[0030] By adopting the above solution, the effect of heating live water can be demonstrated and the premium value of the product can be improved.

[0031] In summary, the phase change electric water heater provided by the utility model has the following technical effects:

[0032] The liquid stored in the water heater is only a liquid heat-conducting medium. Compared with the prior art in which new water is constantly flowing in, the amount of scale generated by the structure of the utility model will be greatly reduced, thereby greatly reducing the phenomenon of water heater damage and poor heat exchange effect caused by scale, thereby improving the service life and heat exchange effect of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the phase change electric water heater of the utility model;

[0034] Figure 2 This is a schematic structural diagram of the second layout of the heat exchange device of the present utility model.

[0035] Among them, the meanings of the figure numbers are as follows: 100, liquid storage tank; 110, liquid heat transfer medium; 200, heat exchange device; 210, phase change material; 300, heating device; 400, water pipe; 410, heat extraction structure; 500, water pump. DETAILED DESCRIPTION

[0036] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In order to facilitate the understanding of the embodiments of the present utility model, the following will be further explained by taking specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present utility model.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] See also Figure 1 As shown, the utility model discloses a phase change electric water heater, including a liquid storage tank 100, a heat exchange device 200, a heating device 300 and a water pipe 400, the liquid storage tank 100 is filled with a liquid heat-conducting medium 110, the heat exchange device 200 is filled with a phase change material 210, the heat exchange device 200 exchanges heat with the liquid heat-conducting medium 110, the heating device 300 is used to heat the liquid heat-conducting medium 110 and / or the phase change material 210, and the water pipe 400 is arranged to pass through the liquid heat-conducting medium 110.

[0041] Specifically, the liquid storage tank 100 is filled with a liquid heat-conducting medium 110. It is best to fill the liquid storage tank 100 with the liquid heat-conducting medium 110, so that the liquid heat-conducting medium 110 can maintain good contact with all the components arranged in the liquid storage tank 100, thereby ensuring the good operation of the water-boiling mechanism based on heat transfer in the liquid storage tank 100. The liquid heat-conducting medium 110 is a liquid that can conduct heat. The liquid heat-conducting medium 110 can be made of one or more mixed liquids such as tap water, pure water or oil as needed. The heat exchange device 200 is filled with a phase change material 210. The heat exchange device 200 can be made of a shell for filling the phase change material 210 by selecting an appropriate material as required. The phase change material 210 is filled in the above shell to form the heat exchange device 200, that is, the material of the heat exchange device 200 can be selected according to the requirements of material stability, durability, thermal conductivity, etc. The heating device 300 heats the liquid heat-conducting medium 110 in contact with it. The heating device 300 can be a common heating device 300 in a water heater, such as a heating rod, etc. to heat the liquid heat-conducting medium 110. The water pipe 400 is set through the liquid heat-conducting medium 110 in the liquid storage tank 100, and the water flowing in the water pipe 400 for use is heated when it flows through the water pipe 400 section immersed in the liquid heat-conducting medium 110.

[0042] The working principle of the above structure is:

[0043] Phase change material 210 heat storage stage: the heating device 300 heats the liquid heat conducting medium 110 in the liquid storage tank 100, and then transfers the heat energy of the liquid heat conducting medium 110 to the phase change material 210 in the heat exchange device 200 through the heat exchange device 200, and the phase change material 210 stores the heat.

[0044] Cold water heating stage: the water circuit is opened, and the required water flows in the water pipe 400. In the process of the above-mentioned water flowing through the water pipe 400 immersed in the liquid heat-conducting medium 110, the liquid heat-conducting medium 110 transfers heat to the water flowing in the water pipe 400 through the water pipe 400. At the same time, the liquid heat-conducting medium 110 will continue to absorb the heat stored in the phase change material 210 in the heat exchange device 200, thereby ensuring that the water flowing through the water pipe 400 is continuously heated.

[0045] The overall workflow is that when electricity consumption is low, the heating device 300 works, starts the heat storage phase of the phase change material 210, and completes low-price heat storage. When using hot water, when the phase change material 210 stores heat, the cold water heating phase is started to heat the running water. During long-term use, when the phase change material 210 cannot meet the temperature requirement for heating the living water during the heating process, the heating device 300 starts to work and heats the water pipe 400 through the liquid heat transfer medium 110. The water pipe 400 absorbs the heat of the liquid heat transfer medium 110 and transfers it to the living water in the water pipe 400 to complete the heating of the living water. While the heating device 300 indirectly heats the living water, the liquid heat transfer medium 110 will simultaneously transfer the heat to the phase change material 210, and the phase change material 210 stores the heat. In the subsequent use of hot water, whether the water heater is turned off or the heating device 300 is turned off after the phase change material 210 completes heat storage, the electric water heater still has the heat to heat a considerable volume of living water, thereby greatly facilitating the use of the electric water heater.

[0046] It should be noted that the above structure can be provided with corresponding parts as needed, for example, when it is necessary to control the water flow, a corresponding water valve is provided at the water pipe to achieve the effect of controlling the water flow. When it is necessary to improve the stability of the air pressure in the water heater, a pressure relief valve can be provided on one side of the liquid storage tank 100 to adjust the air pressure in the liquid storage tank 100. When it is necessary to control the temperature of the liquid heat-conducting medium 200 in the liquid storage tank 100, a temperature sensor can be provided in conjunction with the heating device 300 to monitor the temperature of the liquid heat-conducting medium 200 in the liquid storage tank 100 in real time. Further, multiple temperature sensors can also be provided at different positions in the liquid storage tank 100 to more accurately and dynamically adjust the working timing of the heating device 300. When it is necessary to improve the thermal insulation effect of the liquid storage tank 100, the liquid storage tank 100 can be subjected to thermal insulation treatment on the outer surface or the inner surface of the liquid storage tank 100 as needed, and the liquid storage tank 100 is made into a warehouse body with thermal insulation function, so as to reduce the loss of heat in the liquid storage tank 100. The above structures are all conventional settings in this field, and other common structures or conventional settings are not described here.

[0047] In some embodiments, in order to improve the heating effect of the water flowing in the water pipe 400, the water pipe 400 is provided with a heat extraction structure 410, thereby ensuring that the water pipe 400 achieves a better heating effect on the water in the water pipe 400 in the smallest possible space.

[0048] The heat extraction structure 410 mainly includes the following two implementation modes:

[0049] First, fins are provided on the outer surface of the water pipe 400 to form a heat extraction structure 410 , wherein the fins can increase the contact area between the water pipe 400 and the liquid heat transfer medium 110 , thereby increasing the heat exchange rate of the water pipe 400 , and further increasing the heating efficiency of the water in the water pipe 400 .

[0050] Specifically, the fins on the outer surface of the water pipe 400 can be made of materials as needed, such as metal materials with high stability and high thermal conductivity, or materials with good thermal conductivity such as ceramics and glass. The fins can be mainly arranged on the outer surface of the water pipe 400 in a spiral manner, or multiple fins can be arranged, and the multiple fins are arranged parallel to each other or staggered on the outer surface of the water pipe 400. In addition, the water pipe 400 and the fins can be integrally formed, so as to avoid the problem of cumbersome installation steps between the subsequent fins and the water pipe 400.

[0051] Secondly, the water pipe 400 is spirally or S-shaped bent to form a heat extraction structure 410. The water pipe 400 is bent in a spiral or S-shape to increase the time for water to pass through the water pipe 400 and the contact area between the water pipe 400 and the liquid heat transfer medium 110, thereby increasing the time for the water in the water pipe 400 to be heated by the water pipe 400, thereby increasing the temperature.

[0052] Third, a plurality of water pipes 400 are arranged in an array structure to form a heat extraction structure 410. Specifically, the water pipes 400 can be a plurality of water pipes 400 with relatively thin diameters arranged in an array in the liquid heat transfer medium 110. At the water outlet, the plurality of relatively thin water pipes 400 converge to the water outlet, thereby achieving the effect of concentrated water outlet.

[0053] Specifically, the portion of the water pipe 400 passing through the liquid heat-conducting medium 110 is arranged in a spiral form or an S-shaped bend to extend the time that water passes through the water pipe 400 section immersed in the liquid heat-conducting medium 110, and to increase the amount of water simultaneously located in the water pipe 400 section immersed in the liquid heat-conducting medium 110, thereby ensuring that more water and higher temperature heating tasks can be completed in a smaller space.

[0054] In some embodiments, see Figure 1 and Figure 2 As shown, the heat exchange device 200 is a heat exchange pipeline, and the phase change material 210 is filled in the heat exchange pipeline. The specific heat exchange pipeline setting methods mainly include the following two methods:

[0055] First, the heat exchange pipeline is arranged in a straight line or in a curved and coiled shape in the liquid storage tank 100. The straight line arrangement is a straight tube design, and the curved and coiled arrangement is a coil-like arrangement. The heat exchange device 200 adopts a coil-like design, which can increase the contact area between the heat exchange device 200 and the phase change material 210, and at the same time increase the contact area between the heat exchange device 200 and the liquid heat exchange medium, thereby improving the heat exchange efficiency among the above three.

[0056] Secondly, a plurality of heat exchange pipelines are provided, and are arranged side by side or staggered in the liquid storage tank 100. Specifically, the heat exchange pipelines are installed in parallel in the liquid storage tank 100, or the heat exchange pipelines are installed in a staggered manner in the liquid storage tank 100. Similar to the above scheme, the contact area between the heat exchange device 200 and the phase change material 210 can be increased, and the contact area between the heat exchange device 200 and the liquid heat exchange medium can be increased, thereby improving the heat exchange efficiency among the above three.

[0057] In some embodiments, in order to accelerate the circulation of the liquid heat-conducting medium 110 in the liquid storage tank 100, the phase-change electric water heater further includes a water pump 500, the water pump 500 has a liquid outlet and a liquid inlet, and the liquid outlet and the liquid inlet are both connected to the liquid storage tank 100, so as to mix the liquid heat-conducting medium 110 in the liquid storage tank 100. Specifically, the liquid outlet and the liquid inlet of the water pump 500 are both connected to the liquid storage tank 100, and the liquid heat-conducting medium 110 in the liquid storage tank 100 is mixed by the water pump 500. The water pump 500 can be selectively arranged inside or outside the liquid storage tank 100 to ensure that the liquid heat-conducting medium 110 flows into the liquid inlet, and the liquid heat-conducting medium 110 flowing out through the liquid outlet can flow back into the liquid storage tank 100.

[0058] In this embodiment, the water pump 500 is disposed in the liquid storage tank 100. Since the liquid heat-conducting medium 110 only participates in the circulation inside the liquid storage tank 100, the liquid heat-conducting medium 110 has only a few impurities, which will not affect the water pump 500 and will not produce scale. Therefore, disposing the water pump 500 in the liquid storage tank 100 not only does not affect the normal service life of the water pump 500, but also can improve the integrity of the water heater.

[0059] In addition, in addition to the water pump 500, the liquid heat-conducting medium 110 in the liquid storage tank 100 can also be mixed by setting a stirring blade or other device in the liquid storage tank 100, which will not be described in detail here.

[0060] Furthermore, since the temperature of the liquid heat-conducting medium 110 at the heating device 300 is often higher than the temperature of the liquid heat-conducting medium 110 far away from the heating device 300 during the heating process, based on the above scenario, the heating device 300 and the water pump 500 are both arranged near the water pipe 400, so that the liquid heat-conducting medium 110 with a higher temperature can be pumped to a position far away from the heating device 300, which is conducive to the efficient mixing of the liquid heat-conducting medium 110 according to the temperature conditions. Similarly to the above, since the temperature of the liquid heat-conducting medium 110 at the heating device 300 is often higher than the temperature of the liquid heat-conducting medium 110 far away from the heating device 300 during the heating process, the heating device 300 is arranged near the water pipe 400. When the heating device 300 is working, there will be a greater temperature difference between the liquid heat-conducting medium 110 near the heating device 300 and the water in the water pipe 400. The greater temperature difference can bring a faster heat transfer effect, thereby ensuring the heating effect of the water in the water pipe 400.

[0061] In some embodiments, in order to demonstrate the live water heating effect of the water heater, the water pipe 400 is made of a transparent material. The transparent material used for the water pipe 400 can be made of glass or other polymer transparent materials with good thermal conductivity and high stability. The water pipe 400 is arranged on one side of the liquid storage tank 100. The liquid storage tank 100 is provided with a transparent observation window at the place where the water pipe 400 passes. The transparent observation window can be composed of double-layer glass or other transparent structures with good thermal insulation performance. Through the above structure, the user can intuitively observe the live water heating process, thereby enhancing the product premium value.

[0062] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A phase change electric water heater, characterized in that: include: A liquid storage bin, wherein the liquid storage bin is filled with a liquid heat-conducting medium; A heat exchange device, wherein the heat exchange device is filled with a phase change material and exchanges heat with the liquid heat conducting medium; A heating device, the heating device is used to heat the liquid heat-conducting medium and / or the phase change material; A water pipe is arranged through the liquid heat-conducting medium.

2. A phase change electric water heater according to claim 1, characterized in that: The heat exchange device is in contact with the liquid heat-conducting medium, and the heating device is at least partially in contact with the liquid heat-conducting medium.

3. A phase change electric water heater according to claim 1, characterized in that: The water pipe is provided with a heat extraction structure.

4. A phase change electric water heater according to claim 3, characterized in that: The outer surface of the water pipe is provided with fins to form a heat extraction structure.

5. A phase change electric water heater according to claim 3, characterized in that: The water pipe is spirally or S-shapedly bent to form a heat extraction structure, or a plurality of water pipes are arranged in an array structure to form a heat extraction structure.

6. A phase change electric water heater according to claim 1, characterized in that: The heat exchange device is a heat exchange pipeline, the phase change material is filled in the heat exchange pipeline, and the heat exchange pipeline is arranged in a straight line or in a curved coil in the liquid storage tank.

7. A phase change electric water heater according to claim 1, characterized in that: The heat exchange device is a heat exchange pipeline, the phase change material is filled in the heat exchange pipeline, and a plurality of heat exchange pipelines are provided and are arranged side by side or staggered in the liquid storage tank.

8. A phase change electric water heater according to any one of claims 1 to 7, characterized in that: It also includes a water pump, which has a liquid outlet and a liquid inlet, and the liquid outlet and the liquid inlet are both connected to the liquid storage tank to mix the liquid heat-conducting medium in the liquid storage tank.

9. A phase change electric water heater according to claim 8, characterized in that: The water pump is arranged in the liquid storage tank, and the heating device and the water pump are both arranged near the water pipe.

10. A phase change electric water heater according to claim 1, characterized in that: The water pipe is made of transparent material and is arranged on one side of the liquid storage bin. A transparent observation window is arranged on the liquid storage bin facing the water pipe.

Images