Internal circulation type phase change electric water heater

Abstract

The utility model discloses an internal circulation type phase change electric water heater which comprises a box body, a water pipe, a heating module and a water pump, the box body comprises a heat storage area and a heat exchange area, phase change materials are arranged in the heat storage area, the heat storage area and the heat exchange area are both provided with first liquid heat exchange media, the water pipe penetrates through the heat exchange area, and the heating module is arranged in the heat storage area and / or the heat exchange area. The water pump is used for pumping the first liquid heat exchange medium to circulate in the heat storage area and / or the heat exchange area, the first liquid heat exchange medium conducts circulating heat exchange in the box body, flowing water is heated in the flowing process and directly flows out, incrustation in the flowing water is difficult to adhere to a water pipe, and therefore the influence of the incrustation on the water heater is greatly reduced, and the water heater is more energy-saving and environment-friendly. In the using process, the water pump pumps the first liquid heat exchange medium to circulate between the heat storage area and the heat exchange area, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to an internal circulation 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. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides an internal circulation phase change electric water heater, which can solve the problem of scale generation during long-term heating that affects the normal use of the electric water heater.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] An internal circulation phase change electric water heater, comprising:

[0006] A box body, the box body comprising a heat storage area and a heat exchange area, the heat storage area is provided with a phase change material, the heat exchange area is provided with a first liquid heat exchange medium, and the heat storage area and the heat exchange area can perform heat exchange;

[0007] a water pipe, the water pipe being arranged through the heat exchange area, and the water pipe being capable of performing heat exchange with the first liquid heat exchange medium;

[0008] A heating module, wherein the heating module is arranged in the heat storage area and / or the heat exchange area;

[0009] A water pump is used to pump the first liquid heat exchange medium to circulate in the heat storage area and / or the heat exchange area.

[0010] By adopting the above scheme, the first liquid heat exchange medium circulates and exchanges heat in the box body, and heats the running water flowing in the water pipe. The running water is heated during the flow process and flows out directly. The scale in the running water is difficult to adhere to the water pipe, thereby greatly reducing the impact of scale on the water heater. During use, the water pump pumps the first liquid heat exchange medium to circulate between the heat storage area and the heat exchange area, accelerating the heat exchange efficiency. In addition, the liquid heat exchange medium circulates and exchanges heat in the box body, and the liquid heat exchange medium generates less impurities such as scale in the box body, thereby reducing the impact of impurities such as scale on the heat exchange effect, the heating effect of the heating module and the performance of the water pump.

[0011] Furthermore, a heat storage pipeline is provided in the heat storage area, the phase change material is filled in the heat storage pipeline, the first liquid heat exchange medium is filled in the heat storage area and the heat exchange area, the water pump has a water pump inlet and a water pump outlet, and the water pump inlet and the water pump outlet are both connected to the box.

[0012] By adopting the above solution, the phase change material is filled in the heat storage pipeline, which facilitates the installation and sealing of the phase change material. The phase change material is easy to replace, and it is also convenient to repair the inside of the box during maintenance.

[0013] Furthermore, the heat storage pipeline is arranged in the heat storage area in a straight line or in a curved coil.

[0014] By adopting the above solution, the heat storage pipeline is installed in a straight pipe type or a curved and coiled type, wherein the curved and coiled type installation can increase the contact area between the heat storage pipeline and the first liquid heat exchange medium, thereby improving the heat exchange efficiency.

[0015] Furthermore, there are a plurality of heat storage pipelines, and each of the heat storage pipelines is filled with the phase change material, and the plurality of heat storage pipelines are arranged side by side or alternately in the heat storage area.

[0016] By adopting the above scheme, multiple heat storage pipelines are arranged, and the heat storage areas are arranged side by side or staggered, which ensures that the heat storage pipeline and the first liquid heat exchange medium still have a large contact area. When a problem occurs in the heat storage pipeline, a single heat storage pipeline can be replaced to facilitate maintenance.

[0017] Furthermore, a heat exchanger is provided in the box body, and a partition is provided between the heat storage area and the heat exchange area for isolation. The heat exchanger is arranged through the partition so that the heat exchanger spans the heat storage area and the heat exchange area. The water pump is connected to the heat exchanger to drive the second liquid heat exchange medium in the heat exchanger to flow. The heat exchanger can exchange heat with the phase change material of the heat storage area, and the heat exchanger can exchange heat with the first liquid heat exchange medium of the heat exchange area.

[0018] By adopting the above scheme, the heat exchanger can increase the contact area between the heat exchanger and the phase change material, and between the heat exchanger and the liquid in the heat exchanger, thereby improving the heat exchange efficiency of the phase change material, the heat exchanger and the liquid in the heat exchanger. A partition is provided to isolate the phase change material from the heat exchange area, which facilitates the sealing and installation of the phase change material and also provides more optional types for the first liquid heat exchange medium.

[0019] Furthermore, the heat exchanger is a coil heat exchanger, which includes a coil liquid inlet, a coil pipe section and a coil liquid outlet connected in sequence, the coil pipe section is embedded and installed in the phase change material, the coil liquid inlet and the coil liquid outlet are arranged in the heat exchange area, the coil heat exchanger is an open circulation pipeline structure, the coil liquid inlet and the coil liquid outlet are both connected to the heat exchange area, and the second liquid heat exchange medium is the same as the first liquid heat exchange medium.

[0020] By adopting the above scheme, the coil liquid inlet and the coil liquid outlet are arranged in the heat exchange area, which is convenient for connecting the coil liquid inlet and the coil liquid outlet to other components, such as a water pump, etc. The coiled pipe section is arranged in the phase change material to ensure the contact area between the coiled pipe section and the phase change material, thereby improving the heat exchange efficiency between the two.

[0021] Furthermore, the heat exchanger is a coil heat exchanger, and the coil heat exchanger is a closed circulation pipeline structure.

[0022] By adopting the above solution, a variety of feasible pipe connection methods for the coil heat exchanger are provided.

[0023] Furthermore, the first liquid heat exchange medium and the second liquid heat exchange medium are different heat exchange mediums, a portion of the pipe section of the coil heat exchanger located in the heat exchange area is immersed in the first liquid heat exchange medium, and the water pump is used to pump the second liquid heat exchange medium in the coil heat exchanger to circulate.

[0024] By adopting the above scheme, the coil heat exchanger in the closed circulation pipeline structure is filled with the second liquid heat exchange medium, and the heat exchange between the phase change material, the second liquid heat exchange medium and the first liquid heat exchange medium is completed by the circulation of the second liquid heat exchange medium in the coil heat exchanger.

[0025] Furthermore, the box is at least partially transparent to form an observation portion.

[0026] Furthermore, the water pipe is provided with a heat extraction structure for increasing the contact area between the water pipe and the first liquid heat exchange medium.

[0027] By adopting the above solution, the heat extraction structure can increase the heat exchange rate between the water pipe and the first liquid heat exchange 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.

[0028] In summary, the internal circulation phase change electric water heater provided by the utility model has the following technical effects:

[0029] The first liquid heat exchange medium circulates and exchanges heat in the box, heating the running water flowing in the water pipe. The running water is heated during the flow and flows out directly. The scale in the running water is difficult to adhere to the water pipe, thus greatly reducing the impact of scale on the water heater. The water pump pumps the first liquid heat exchange medium to circulate between the heat storage area and the heat exchange area during use, accelerating the heat exchange efficiency. In addition, the liquid heat exchange medium circulates and exchanges heat in the box, and the liquid heat exchange medium generates less impurities such as scale in the box, thereby reducing the impact of impurities such as scale on the heat exchange effect, the heating effect of the heating module and the performance of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the phase change electric water heater of Embodiment 1 and Embodiment 2 of the present utility model;

[0031] Figure 2 This is a schematic structural diagram of a second layout of a heat exchange device according to Embodiment 2 of the present utility model;

[0032] Figure 3 This is a schematic diagram of the first layout of the phase change electric water heater of Example 3 of the utility model;

[0033] Figure 4 This is a schematic diagram of the second layout structure of the phase change electric water heater of Example 3 of the present utility model.

[0034] Among them, the meanings of the figure numbers are as follows: 100, box body; 110, heat storage area; 120, heat exchange area; 130, phase change material; 141, first liquid heat exchange medium; 142, second liquid heat exchange medium; 150, partition; 210, heat storage pipeline; 220, coil heat exchanger; 221, coil liquid inlet; 222, coiled pipe section; 223, coil liquid outlet; 300, heating module; 400, water pipe; 410, heat extraction structure; 500, water pump. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Example 1

[0040] See also Figure 1 As shown, the utility model discloses an internal circulation phase change electric water heater, including a box 100, a water pipe 400, a heating module 300 and a water pump 500. The box 100 includes a heat storage area 110 and a heat exchange area 120. The heat storage area 110 is provided with a phase change material 130. The heat exchange area 120 is provided with a first liquid heat exchange medium 141. The heat storage area 110 and the heat exchange area 120 can perform heat exchange. The water pipe 400 is arranged to pass through the heat exchange area 120. The water pipe 400 and the first liquid heat exchange medium 141 can perform heat exchange. The heating module 300 is arranged in the heat storage area 110 and / or the heat exchange area 120. The water pump 500 is used to pump the first liquid heat exchange medium 141 to circulate in the heat storage area 110 and / or the heat exchange area 120.

[0041] Specifically, the two sides of the box 100 are divided into a heat storage area 110 and a heat exchange area 120. A phase change material 130 is arranged in the heat storage area 110 for storing heat. A first liquid heat exchange medium 141 is arranged in the heat exchange area 120. The first liquid heat exchange medium 141 can be composed of one or more materials selected from pure water, tap water and oil. Of course, other liquids that can contact with the phase change material 130, have good thermal conductivity and high stability can also be used for configuration. The water pipe 400 passes through the heat exchange area 120, one end is the inflow end of the water pipe 400, and the other end is the outflow end of the water pipe 400. The live water flows in through the inflow end of the water pipe 400 and flows out through the outflow section of the water pipe 400. The heating is completed during the flow process, that is, the live water is heated. The heating module 300 can be arranged in the heat storage area 110 or the heat exchange area 120 as needed, and can heat the phase change material 130 or the first liquid heat exchange medium 141. The water pump 500 can be arranged in the heat storage area 110 or the heat exchange area 120 as needed, and of course can also be arranged outside the box 100, and can pump the first liquid heat exchange medium 141 to circulate between the heat storage area 110 and / or the heat exchange area 120, so as to complete the indirect heat exchange between the water pipe 400 and the phase change material 130 with the first liquid heat exchange medium 141 as the medium. The first liquid heat exchange medium 141 directly contacts or indirectly contacts the water pipe 400 and the phase change material 130 respectively, so as to balance the temperature among the first liquid heat exchange medium 141, the water pipe 400 and the phase change material 130, wherein direct contact means that the first liquid heat exchange medium 141 directly contacts the water pipe 400 and the phase change material 130 respectively, and indirect contact means that the phase change material 130 and the first liquid heat exchange medium 141 may be filled in a shell or a pipe for installation, and indirectly transfer heat after passing through the above-mentioned shell or pipe, which is the above-mentioned indirect contact.

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

[0043] During the heat storage stage of the phase change material 130, the heating module 300 works. When the heating module 300 is arranged in the heat storage area 110, the heating module 300 heats the phase change material 130. If the phase change material 130 is contained by a shell, the heating module 300 heats the shell, and the shell transfers the heat of the heating module 300 to the phase change material 130 for heat storage. When the heating module 300 is arranged in the heat exchange area 120, the heating module 300 heats the first liquid heat exchange medium 141, and the first liquid heat exchange medium 141 transfers heat to the phase change material 130. Similarly, if the phase change material 130 is wrapped by a shell, the first liquid heat exchange medium 141 transfers heat to the phase change material 130 through the shell, and the phase change material 130 absorbs heat and stores the heat. At the same time, the water pump 500 continues to work to accelerate the circulation of the first liquid heat exchange medium 141 in the box 100 to ensure the uniform temperature of the first liquid heat exchange medium 141.

[0044] During the cold water heating stage, the phase change material 130 continuously transfers heat to the first liquid heat exchange medium 141, and the first liquid heat exchange medium 141 then transfers heat to the water pipe 400. The water pipe 400 heats the live water flowing through the water pipe 400 to complete the living water heating. At the same time, the water pump 500 continues to work to accelerate the circulation of the first liquid heat exchange medium 141 in the box 100 to ensure the uniformity of the temperature of the first liquid heat exchange medium 141.

[0045] The overall working process is: when the electricity consumption is low, the heating module 300 works, starts the heat storage stage of the phase change material 130, and completes the low-price heat storage. When using hot water, when the phase change material 130 stores heat, the cold water heating stage is started to heat the running water. During long-term use, when the phase change material 130 cannot meet the temperature requirement for heating the living water during the heating process, the heating module 300 starts to work and heats the water pipe 400 through the first liquid heat exchange medium 141. The water pipe 400 absorbs the heat of the first liquid heat exchange medium 141 and transfers it to the living water in the water pipe 400 to complete the heating of the living water. While the heating module 300 indirectly heats the living water, the first liquid heat exchange medium 141 will simultaneously transfer the heat to the phase change material 130, and the phase change material 130 stores the heat. In the subsequent use of hot water, whether the water heater is turned off or the heating module 300 is turned off after the phase change material 130 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 auxiliary components as needed, for example, when it is necessary to control the water flow, a corresponding water valve is provided at the water pipe 400 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 box 100 to adjust the air pressure in the box 100. When it is necessary to control the temperature of the first liquid heat exchange medium 141 in the box 100, a temperature sensor can be provided in conjunction with the heating module 300 to monitor the temperature of the first liquid heat exchange medium 141 and / or the phase change material 130 in the box 100 in real time. Further, multiple temperature sensors can also be provided at different positions in the box 100 to more accurately and dynamically adjust the working timing of the heating module 300. When it is necessary to improve the insulation effect of the box 100, the box 100 can be heat-insulated on the outer surface or the inner surface of the box 100 as needed, and the box 100 can be made into a warehouse with insulation function to reduce the loss of heat in the box 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, the water pipe 400 is provided with a heat extraction structure 410 for increasing the contact area between the water pipe 400 and the first liquid heat exchange medium 141. The heat extraction structure 410 can increase the rate of heat exchange between the water pipe 400 and the first liquid heat exchange medium 141, 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 housing 100 is at least partially transparent to form an observation portion, which is convenient for the user to observe the first liquid heat exchange medium inside the water heater. Furthermore, the portion of the water pipe 400 exposed to the observation portion is made of a transparent material for observing the water flow inside the water pipe 400. The housing 100 and the water pipe 400 are provided with corresponding transparent portions, so that the running water flowing in the water pipe 400 can be intuitively observed.

[0049] The heat extraction structure 410 mainly includes the following two implementation modes:

[0050] 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 first liquid heat exchange medium 141, 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.

[0051] 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.

[0052] Secondly, the water pipe 400 is spirally or S-shaped bent to form a heat extraction structure 410. The spiral or S-shaped bends in the water pipe 400 increase the time for water to pass through the water pipe 400 and the contact area between the water pipe 400 and the first liquid heat exchange medium 141, thereby increasing the time for the water in the water pipe 400 to be heated by the water pipe 400, thereby increasing the temperature.

[0053] Specifically, the portion of the water pipe 400 passing through the first liquid heat exchange medium 141 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 first liquid heat exchange medium 141, and to increase the amount of water simultaneously located in the water pipe 400 section immersed in the first liquid heat exchange medium 141, thereby ensuring that more water and higher temperature heating tasks can be completed in a smaller space.

[0054] Example 2

[0055] Based on Example 1, Figure 1 and Figure 2 As shown, a heat storage pipeline 210 is provided in the heat storage area 110, the phase change material 130 is filled in the heat storage pipeline 210, the first liquid heat exchange medium 141 fills the heat storage area 110 and the heat exchange area 120, and the water pump 500 has a water pump inlet and a water pump outlet, and the water pump inlet and the water pump outlet are both connected to the box body 100.

[0056] Specifically, the heat storage pipeline 210 is arranged in the heat storage area 110, the phase change material 130 is filled in the heat storage pipeline 210, and the first liquid heat exchange medium 141 can be filled in an amount according to demand, wherein it is best to fill the box 100 with the first liquid heat exchange medium 141. Such a setting can ensure that the first liquid heat exchange medium 141 maintains good contact with other parts immersed therein (such as water pipes 400, phase change materials 130, etc.), thereby ensuring the effect of heat transfer based on the first liquid heat exchange medium 141 as a heat transfer medium. The heat storage pipeline 210 is a pipe made of a material with good thermal conductivity, durability and stability. Since the first liquid heat exchange medium 141 fills the box 100, the heating module 300 can be selectively arranged in the heat storage area 110 or the heat exchange area 120 in the box, ensuring that at least part of the heating module 300 is in contact with the first liquid heat exchange medium 141. The heating module 300 can select a suitable heating module 300 as needed. In this embodiment, the heating module 300 adopts a heating rod, and the water pump 500 can be arranged outside the box 100 and inside the box 100 as needed to ensure that the water pump 500 can pump the first liquid heat exchange medium 141 for circulation.

[0057] The working principle of the above structure is:

[0058] Heat storage stage of the phase change material 130: the heating module 300 heats the first liquid heat exchange medium 141 in the box body 100, and the heat of the first liquid heat exchange medium 141 is transmitted to the phase change material 130 in the heat storage pipeline 210, and the phase change material 130 stores the heat. During this period, when the temperature difference of the first liquid heat exchange medium 141 is large, the water pump 500 works to mix the first liquid heat exchange medium 141 to achieve uniform temperature as soon as possible, so as to improve the heat storage efficiency of the phase change material 130.

[0059] Cold water heating stage: open the water channel of the water pipe 400, and live water flows into the water pipe 400. In the process of the live water flowing through the water pipe 400 immersed in the first liquid heat exchange medium 141, the first liquid heat exchange medium 141 transfers heat through the water pipe 400 to the live water flowing in the water pipe 400. At the same time, the first liquid heat exchange medium 141 will continue to absorb the heat stored in the phase change material 130 in the heat storage pipeline 210 to continuously heat the live water flowing through the water pipe 400. During this period, the water pump 500 continues to work to accelerate the mixing of the first liquid heat exchange medium 141 to achieve uniform temperature as soon as possible.

[0060] Similar to Example 1, when the electricity consumption is low, the heating module 300 works, starts the heat storage phase of the phase change material 130, and completes the low-price heat storage. When using hot water, when the phase change material 130 stores heat, the cold water heating phase is started to heat the running water. During long-term use, when the phase change material 130 cannot meet the temperature requirement for heating the living water during the heating process, the heating module 300 starts to work and heats the water pipe 400 through the first liquid heat exchange medium 141. The water pipe 400 absorbs the heat of the first liquid heat exchange medium 141 and transfers it to the living water in the water pipe 400 to complete the heating of the living water. While the heating module 300 indirectly heats the living water, the first liquid heat exchange medium 141 will simultaneously transfer the heat to the phase change material 130, and the phase change material 130 stores the heat. In the subsequent use of hot water, whether the water heater is turned off or the heating module 300 is turned off after the phase change material 130 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.

[0061] In this embodiment, the arrangement of the heat storage pipeline 210 mainly includes the following two methods:

[0062] First, refer to Figure 1 As shown, the heat storage pipeline 210 is arranged in a straight line or in a curved coil in the box body 100. It is arranged in a straight line, that is, a straight pipe type, and is arranged in a curved coil, that is, it is arranged in a manner similar to a coil type. The above structure can increase the contact area between the heat storage pipeline 210, the phase change material 130 and the first liquid heat exchange medium 141. A larger contact area means more heat exchange points, thereby improving the heat exchange efficiency among the three.

[0063] Second, refer to Figure 2As shown, a plurality of heat storage pipelines 210 are provided, and are arranged in parallel or staggered in the housing 100. Specifically, the heat storage pipelines 210 are installed in parallel in the housing 100, or the heat storage pipelines 210 are installed in a staggered manner in the housing 100. Regardless of the parallel or staggered installation method, the contact area between the heat storage pipeline 210, the phase change material 130 and the first liquid heat exchange medium 141 can be effectively increased. Such a design of increasing the contact area also helps to improve the heat exchange efficiency among the above three.

[0064] Example 3

[0065] Based on Example 1, Figure 3 and Figure 4 As shown, a heat exchanger is provided in the box 100. In this embodiment, the heat exchanger is a coil heat exchanger 220. Of course, the heat exchanger can also be other heat exchange devices with better thermal conductivity. A partition 150 is provided between the heat storage area 110 and the heat exchange area 120 for isolation. The coil heat exchanger 220 is arranged through the partition 150 so that the coil heat exchanger 220 spans the heat storage area 110 and the heat exchange area 120. The water pump 500 is connected to the coil heat exchanger 220 to drive the second liquid heat exchange medium 142 in the coil heat exchanger 220 to flow. The coil heat exchanger 220 can exchange heat with the phase change material 130 of the heat storage area 110, and the coil heat exchanger 220 can exchange heat with the first liquid heat exchange medium 141 of the heat exchange area 120.

[0066] Specifically, the coil heat exchanger 220 is arranged inside the housing 100, and a partition 150 is arranged between the heat storage area 110 and the heat exchange area 120 to isolate the heat storage area 110 and the heat exchange area 120, and indirectly isolate the direct contact between the phase change material 130 and the first liquid heat exchange medium 141, so as to facilitate the installation and sealing of the phase change material 130. On the basis that the first liquid heat exchange medium 141 and the phase change material 130 are not in direct contact, the selection space of the material of the first liquid heat exchange medium 141 can be increased. The coil heat exchanger 220 has some pipelines passing through the partition 150 to ensure that the coil heat exchanger 220 is arranged across the heat storage area 110 and the heat exchange area 120. The water pump 500 is connected to the coil heat exchanger 220 to drive the second liquid heat exchange medium 142 in the coil heat exchanger 220 to flow.

[0067] Furthermore, in order to increase the contact area between the coil heat exchanger 220 and the phase change material 130, the coil heat exchanger 220 includes a coil liquid inlet 221, a coiled pipe section 222 and a coil liquid outlet 223 connected in sequence, the coiled pipe section 222 is embedded and installed in the phase change material 130, the coil liquid inlet 221 and the coil liquid outlet 223 are arranged in the heat exchange area 120, the coil heat exchanger 220 is an open circulation pipeline structure, the coil liquid inlet 221 and the coil liquid outlet 223 are both connected to the heat exchange area 120, and the second liquid heat exchange medium 142 is the same as the first liquid heat exchange medium 141.

[0068] Specifically, the coil liquid inlet 221 and the coil liquid outlet 223 are arranged in the heat exchange area 120 to facilitate the connection of the coil liquid inlet 221 and the coil liquid outlet 223 to other components, such as a water pump 500, etc. The coiled pipe section 222 is arranged in the phase change material 130 to ensure the contact area between the coiled pipe section 222 and the phase change material 130, thereby improving the heat exchange efficiency between the two. The coil heat exchanger 220 is an open circulation pipeline structure, and the coil liquid inlet 221 and the coil liquid outlet 223 are both connected to the heat exchange area 120. The second liquid heat exchange medium 142 is the same as the first liquid heat exchange medium 141.

[0069] Regarding the implementation of the open circulation pipeline structure:

[0070] Since the first liquid heat exchange medium 141 is the same as the second liquid heat exchange medium 142, for ease of understanding, in the following embodiments of the open circulation pipeline structure, the first liquid heat exchange medium 141 is used to replace the first liquid heat exchange medium 141 and the second liquid heat exchange medium 142.

[0071] Specific reference Figure 3 As shown, a phase change material 130 is installed in the heat storage area 110, a first liquid heat exchange medium 141 is provided in the heat exchange area 120, a coil liquid inlet 221 and a coil liquid outlet 223 of the coil heat exchanger 220 are both located in the heat exchange area 120 and inserted into the immersion range of the first liquid heat exchange medium 141, a coiled pipe section 222 of the coil heat exchanger 220 is embedded and installed in the phase change material 130, a water pump 500 is provided at a point on the pipeline of the coil heat exchanger 220, and pumps the first liquid heat exchange medium 141 to circulate in the coil heat exchanger 220, and a heating module 300 is provided in the heat exchange area 120 and immersed in the first liquid heat exchange medium 141 to ensure contact between the heating module 300 and the first liquid heat exchange medium 141.

[0072] The working principle of the above structure is:

[0073] Heat storage stage of the phase change material 130: the heating module 300 heats the first liquid heat exchange medium 141 in the heat exchange zone 120, and then the first liquid heat exchange medium 141 enters the coil heat exchanger 220 through the coil liquid inlet 221 through the water pump 500. Thereafter, the first liquid heat exchange medium 141 passes through the coiled pipe section 222 and the coil liquid outlet 223 in sequence, and then flows into the heat exchange zone 120. When the first liquid heat exchange medium 141 flows through the coiled pipe section 222, part of the heat carried by the first liquid heat exchange medium 141 is transferred to the phase change material 130 through the coiled pipe section 222, and the phase change material 130 absorbs the heat to store the heat.

[0074] Cold water heating stage: open the water circuit of the water pipe 400 and the water pump 500. When the living water in the water pipe 400 is immersed in the first liquid heat exchange medium 141, the water pipe 400 absorbs the heat of the first liquid heat exchange medium 141 to complete the heating of the living water. When the living water continues to flow into the water pipe 400, the water pump 500 circulates the first liquid heat exchange medium 141 after absorbing the heat through the coil heat exchanger 220. During the flow, it absorbs the heat stored in the phase change material 130 to complete the continuous replenishment of the heat of the first liquid heat exchange medium 141, and completes the continuous heating of the living water that continuously flows into the water pipe 400.

[0075] Similar to Example 1, when the electricity consumption is low, the heating module 300 works, starts the heat storage phase of the phase change material 130, and completes the low-price heat storage. When using hot water, when the phase change material 130 stores heat, the cold water heating phase is started to heat the running water. During long-term use, when the phase change material 130 cannot meet the temperature requirement for heating the living water during the heating process, the heating module 300 starts to work and heats the water pipe 400 through the first liquid heat exchange medium 141. The water pipe 400 absorbs the heat of the first liquid heat exchange medium 141 and transfers it to the living water in the water pipe 400 to complete the heating of the living water. While the heating module 3000 indirectly heats the living water, the first liquid heat exchange medium 141 accelerates the heat transfer to the phase change material 130 under the action of the water pump 500. The phase change material 130 stores the heat. In the subsequent use of hot water, whether the water heater is turned off or the heating module 300 is turned off after the phase change material 130 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.

[0076] The coil heat exchanger 220 may also be configured as a closed loop pipeline structure. The closed loop pipeline structure is a coil liquid inlet 221 connected to a coil liquid outlet 223 .

[0077] Regarding the implementation method of closed loop piping structure:

[0078] Reference Figure 4As shown, the first liquid heat exchange medium 141 includes the first liquid heat exchange medium 141 and the second liquid heat exchange medium 142, the coil heat exchanger 220 in the closed circulation pipeline structure is filled with the second liquid heat exchange medium 142, the first liquid heat exchange medium 141 is arranged in the heat exchange area 120, and the partial pipe section of the coil heat exchanger 220 located in the heat exchange area 120 is immersed in the first liquid heat exchange medium 141, and the water pump 500 is used to pump the second liquid heat exchange medium 142 in the coil heat exchanger 220 to circulate, wherein the first liquid heat exchange medium 141 and the second liquid heat exchange medium 142 can be made of the same material or different materials. In this embodiment, the closed circulation pipeline structure is to connect the coil liquid inlet 221 and the coil outlet of the coil heat exchanger 220 to the water pump liquid inlet and the water pump liquid outlet of the water pump 500 respectively, so as to complete the circulation of the second liquid heat exchange medium 142 filled in the coil heat exchanger 220 in the coil heat exchanger 220.

[0079] The working principle of the above structure is:

[0080] Heat storage stage of the phase change material 130: the heating module 300 heats the first liquid heat exchange medium 141, and the heat of the first liquid heat exchange medium 141 is transferred to the second liquid heat exchange medium 142 inside the coil heat exchanger 220 via the coil heat exchanger 220 located in the heat exchange area 120, and the water pump 500 drives the second liquid heat exchange medium 142 to circulate in the coil heat exchanger 220. During the circulation process, the second liquid heat exchange medium 142 transfers the heat to the phase change material 130 via the coil heat exchanger 220, and the phase change material 130 absorbs the heat and stores the heat.

[0081] During the cold water heating stage, when the living water in the water pipe 400 passes through the water pipe 400 immersed in the first liquid heat exchange medium 141, the water pipe 400 absorbs the heat of the first liquid heat exchange medium 141 and transfers it to the living water to complete the heating of the living water. The second liquid heat exchange medium 142 transfers the heat to the first liquid heat exchange medium 141 through the coil heat exchanger 220 to keep the first liquid heat exchange medium 141 at a relatively stable temperature. During this period, the water pump 500 continues to work, and the second liquid heat exchange medium 142 circulates in the coil heat exchanger 220. During the circulation process, the second liquid heat exchange medium 142 absorbs the heat stored in the phase change material 130 to keep the second liquid heat exchange medium 142 at a stable temperature, thereby ensuring the temperature of the first liquid heat exchange medium 141 in contact with the coil heat exchanger 220, thereby ensuring the heating effect of the first liquid heat exchange medium 141 on the living water in the water pipe 400.

[0082] Similar to Example 1, when the electricity consumption is low, the heating module 300 works, starts the heat storage phase of the phase change material 130, and completes the low-price heat storage. When using hot water, when the phase change material 130 stores heat, the cold water heating phase is started to heat the running water. During long-term use, when the phase change material 130 cannot meet the temperature requirement for heating the living water during the heating process, the heating module 300 starts to work and heats the water pipe 400 through the first liquid heat exchange medium 141. The water pipe 400 absorbs the heat of the first liquid heat exchange medium 141 and transfers it to the living water in the water pipe 400 to complete the heating of the living water. While the heating module 300 indirectly heats the living water, the electric water heater simultaneously performs the heat storage stage of the phase change material 130 to supply heat energy to the phase change material 130 for heat storage in the phase change material 130. Therefore, in the subsequent use of hot water, whether the water heater is turned off or the heating module 300 is turned off after the phase change material 130 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.

[0083] In addition, the designer can, as required, place part of the coiled tube section 222 through the partition 150 and arrange it in the heat exchange area 120, thereby increasing the contact area between the coil heat exchanger 220 and the first liquid heat exchange medium 141, thereby improving the heat exchange efficiency between the two.

[0084] 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. An internal circulation phase change electric water heater, characterized in that: include: A box body, the box body comprising a heat storage area and a heat exchange area, the heat storage area is provided with a phase change material, the heat exchange area is provided with a first liquid heat exchange medium, and the heat storage area and the heat exchange area can perform heat exchange; a water pipe, the water pipe being arranged through the heat exchange area, and the water pipe being capable of performing heat exchange with the first liquid heat exchange medium; A heating module, wherein the heating module is arranged in the heat storage area and / or the heat exchange area; A water pump is used to pump the first liquid heat exchange medium to circulate in the heat storage area and / or the heat exchange area.

2. An internal circulation phase change electric water heater according to claim 1, characterized in that: A heat storage pipeline is provided in the heat storage area, the phase change material is filled in the heat storage pipeline, the first liquid heat exchange medium is filled in the heat storage area and the heat exchange area, the water pump has a water pump inlet and a water pump outlet, and the water pump inlet and the water pump outlet are both connected to the box.

3. An internal circulation phase change electric water heater according to claim 2, characterized in that: The heat storage pipeline is arranged in the heat storage area in a straight line or in a curved manner.

4. An internal circulation phase change electric water heater according to claim 2, characterized in that: There are a plurality of heat storage pipelines, and each of the heat storage pipelines is filled with the phase change material. The plurality of heat storage pipelines are arranged side by side or staggered in the heat storage area.

5. The internal circulation phase change electric water heater according to claim 1, characterized in that: A heat exchanger is provided in the box body, a partition is provided between the heat storage area and the heat exchange area for isolation, the heat exchanger is arranged through the partition so that the heat exchanger spans the heat storage area and the heat exchange area, the water pump is connected to the heat exchanger to drive the second liquid heat exchange medium in the heat exchanger to flow, the heat exchanger can perform heat exchange with the phase change material of the heat storage area, and the heat exchanger can perform heat exchange with the first liquid heat exchange medium of the heat exchange area.

6. An internal circulation phase change electric water heater according to claim 5, characterized in that: The heat exchanger is a coil heat exchanger, which includes a coil liquid inlet, a coil pipe section and a coil liquid outlet connected in sequence, the coil pipe section is embedded and installed in the phase change material, the coil liquid inlet and the coil liquid outlet are arranged in the heat exchange area, the coil heat exchanger is an open circulation pipeline structure, the coil liquid inlet and the coil liquid outlet are both connected to the heat exchange area, and the second liquid heat exchange medium is the same as the first liquid heat exchange medium.

7. The internal circulation phase change electric water heater according to claim 5, characterized in that: The heat exchanger is a coil heat exchanger, and the coil heat exchanger is a closed circulation pipeline structure.

8. An internal circulation phase change electric water heater according to claim 7, characterized in that: The first liquid heat exchange medium and the second liquid heat exchange medium are different heat exchange mediums, a portion of the pipe section of the coil heat exchanger located in the heat exchange area is immersed in the first liquid heat exchange medium, and the water pump is used to pump the second liquid heat exchange medium in the coil heat exchanger to circulate.

9. The internal circulation phase change electric water heater according to claim 1, characterized in that: The box body is at least partially transparent to form an observation portion.

10. The internal circulation phase change electric water heater according to claim 1, characterized in that: The water pipe is provided with a heat extraction structure for increasing the contact area between the water pipe and the first liquid heat exchange medium.

Images