Phase change split barrel type electric water heater

Abstract

The utility model discloses a phase change split barrel type electric water heater which comprises a box body, a water pipe and a first heating module, the box body comprises a heat storage area, a heat exchange area and an empty barrel area, phase change materials are arranged in the heat storage area, and heat exchange can be conducted between the heat storage area and the heat exchange area; the water pipe penetrates through the heat exchange area; the first heating module is arranged in the heat storage area and / or the heat exchange area, and a flow guide pipe communicated with the empty barrel area is arranged on the side, close to the empty barrel area, of the heat exchange area so that the first liquid heat exchange medium can circulate between the heat exchange area and the empty barrel area. The first liquid heat exchange medium circulates in the box body to heat running water in the water pipe, heating is completed when the running water flows, and scaling is not prone to occurring. In the heating process, the cooled first liquid heat exchange medium flows into the empty barrel area, the first liquid heat exchange medium in the heat storage area supplements the heat exchange area, and the consistency of the temperature of outlet water passing through the water pipe is guaranteed.

Description

Technical Field

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

[0002] A water heater is a device that uses various physical principles to increase the temperature of cold water to hot water within a certain period of time. In a storage electric water heater, water is heated inside the electric heater, and the heated water is stored in the electric heater and is heated repeatedly. During the above heating process, more scale will be generated. If used for a long time, more new water will enter the electric water heater for heating, which will cause a lot of scale to accumulate, resulting in poor water quality and even blockage, affecting the normal use of the electric water heater.

[0003] In addition, the circulation in the barrel with hot water coming out and cold water taking in at the same time will cause the water temperature in the barrel to drop, and the stability of the water outlet temperature cannot be guaranteed. Utility Model Content

[0004] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a phase change split barrel type electric water heater, which can solve the problem that scale accumulation caused by long-term heating of water in the water heater affects the normal use of the electric water heater and the heating water temperature is unstable during use.

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

[0006] A phase-change split barrel-type electric water heater, comprising:

[0007] A box body, the box body includes a heat storage area, a heat exchange area and an empty barrel area, and all of them are independent chambers, 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;

[0008] A water pipe, the water pipe passes through the heat exchange zone, the two ends of the water pipe are respectively a live water inlet end and a live water outlet end, the live water inlet end is an end of the water pipe close to the live water inlet, and the live water outlet end is an end of the water pipe close to the live water outlet;

[0009] A first heating module, which is disposed in the heat storage area and / or the heat exchange area to heat the phase change material and / or the first liquid heat exchange medium;

[0010] Wherein, a flow guide pipe communicating with the empty barrel area is provided on one side of the heat exchange area close to the empty barrel area, so as to allow the first liquid heat exchange medium to flow between the heat exchange area and the empty barrel area.

[0011] 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, thus greatly reducing the impact of scale on the water heater. During the heating process, when the running water flows through the water pipe section in the box body, the water pipe absorbs the heat of the first liquid heat exchange medium near the water pipe, causing its temperature to drop. The cooled first liquid heat exchange medium flows into the empty barrel area, and the first liquid heat exchange medium in the heat storage area replenishes the heat exchange area, ensuring the stability of the temperature of the first liquid heat exchange medium in the heat exchange area, thereby ensuring the stability of the temperature of the water pipe arranged through the heat exchange area, and finally achieving the consistency of the water outlet temperature through the water pipe.

[0012] Furthermore, it also includes a first water pump, which 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 to pump the first liquid heat exchange medium to circulate in the heat storage area and the heat exchange area.

[0013] By adopting the above solution, the first water pump can accelerate the circulation in the heat storage area and the heat exchange area, and can control the circulation direction of the first liquid heat exchange medium. In addition, the water pump can accelerate the mixing of the first liquid heat exchange medium in the heat storage area and the heat exchange area to ensure the uniformity of the temperature of the first liquid heat exchange medium.

[0014] Furthermore, the guide pipe is provided with a second water pump, and the second water pump is used to transport the first liquid heat exchange medium to circulate between the heat exchange area and the empty barrel area.

[0015] By adopting the above solution, the second water pump can control the circulation direction of the first liquid heat exchange medium in the heat exchange area and the empty barrel area.

[0016] Furthermore, a heat storage pipeline is provided in the heat storage area, the phase change material is filled in the heat storage pipeline, and the first liquid heat exchange medium immerses the heat storage area and the heat exchange area.

[0017] 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 and achieves indirect contact between the first liquid heat exchange medium and the phase change material, thereby broadening the selection range of the first liquid heat exchange medium and the phase change material.

[0018] Furthermore, a heat exchanger is provided in the box body, and the heat exchanger passes through the cavity wall of the heat storage area chamber and the cavity wall of the heat exchange area chamber so that the heat exchanger spans the heat storage area and the heat exchange area. A first water pump is installed on the pipeline of 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.

[0019] By adopting the above scheme, the heat exchanger can increase the contact area between the coil heat exchanger and the phase change material, and between the heat exchanger and the second liquid heat exchange medium, thereby improving the heat exchange efficiency of the phase change material, the heat exchanger and the first liquid heat exchange medium. In addition, the heat storage area and the heat exchange area are both provided with independent chambers to isolate the phase change material in the heat storage area, thereby expanding the selection range of the first liquid heat exchange medium and the phase change material.

[0020] 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, and the coil liquid inlet and the coil liquid outlet are arranged in the heat exchange zone; 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 zone, and the second liquid heat exchange medium is the same as the first liquid heat exchange medium; the first water pump is used to pump the first liquid heat exchange medium to circulate in the coil heat exchanger and the heat exchange zone.

[0021] By adopting the above solution, the first liquid heat exchange medium is circulated in the heat exchange area and the coil heat exchanger, thereby achieving heat exchange between the first liquid heat exchange medium and the phase change material in the heat storage area and the water pipes in the heat exchange area.

[0022] Furthermore, the heat exchanger is a coil heat exchanger, and the coil heat exchanger is a closed circulation pipeline structure.

[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 first 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 body is at least partially transparent in the heat exchange area to form an observation portion, and the portion of the water pipe exposed to the observation portion is made of a transparent material for observing the water flow inside the water pipe.

[0026] By adopting the above solution, the box body and the water pipe are provided with corresponding transparent parts, so the running water flowing in the water pipe can be visually observed, which is convenient for users to observe and improve the premium value of the product.

[0027] Furthermore, the empty barrel area and / or the flow guide pipe is provided with a second heating module; the empty barrel area is provided with a reflux pipe connected to the heat exchange area and / or the heat storage area.

[0028] By adopting the above scheme, the second heating module in the empty barrel area heats the first liquid heat exchange medium in the empty barrel area. After the temperature of the first liquid heat exchange medium is heated to the standard, it is introduced into the heat exchange area again for circulation, thereby increasing the service life of the electric water heater and improving the utilization rate of the pre-heated first liquid heat exchange medium; setting a reflux pipe provides more ways for the circulation of the first liquid heat exchange medium inside the electric water heater.

[0029] In summary, the phase-change split barrel electric water heater provided by the utility model has the following technical effects:

[0030] Since the first liquid heat exchange medium circulates and exchanges heat and is heated in the box, less impurities such as scale are generated. Less impurities can effectively reduce the impact on heat exchange efficiency and heating efficiency. In addition, the first liquid heat exchange medium heats the running water flowing in the water pipe, and the running water is heated and flows out directly during the flow process. 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. During the heating process, when the running water flows through the water pipe section in the box, it absorbs the heat of the first liquid heat exchange medium near the water pipe through the water pipe, causing its temperature to drop. The cooled first liquid heat exchange medium flows into the empty barrel cavity, ensuring the stability of the temperature of the first liquid heat exchange medium in the heat exchange area, thereby ensuring the stability of the hot water temperature of the water pipe passing through the heat exchange area, and finally achieving the consistency of the water outlet temperature through the water pipe, avoiding the temperature of the hot water in the water pipe to drop as the water use time increases. In addition, the first liquid heat exchange medium with residual heat flows back from the empty barrel cavity to the heat exchange area. When the first heating module is heated, the first liquid heat exchange medium can be heated to the preset temperature more quickly to make full use of the residual heat. When the first heating module is not heated, the first liquid heat exchange medium with residual heat can also exchange heat with the cold water in the water pipe again, extending the use time of the warm water in the water pipe, thereby improving the utilization rate of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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;

[0032] Figure 2 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 3 This is a schematic diagram of the second layout of the phase change electric water heater of Example 3 of the utility model;

[0034] Figure 4This is a schematic diagram of the layout structure of the phase change electric water heater of Example 4 of the utility model.

[0035] Among them, the meanings of the figure marks are as follows: 100, box body; 110, heat storage area; 120, heat exchange area; 130, empty barrel area; 141, first liquid heat exchange medium; 142, second liquid heat exchange medium; 150, phase change material; 210, heat storage pipeline; 220, coil heat exchanger; 221, coil liquid inlet; 222, coiled pipe section; 223, coil liquid outlet; 300, first heating module; 400, water pipe; 410, live water inflow end; 420, live water outflow end; 430, heat extraction structure; 500, first water pump; 600, diversion structure; 610, diversion pipe; 620, second water pump; 700, second heating module; 800, reflux pipe. 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] Example 1

[0041] See also Figure 1The utility model discloses a phase-change split barrel electric water heater: comprising: a box 100, a water pipe 400 and a first heating module 300, the box 100 comprises a heat storage area 110, a heat exchange area 120 and an empty barrel area 130, and all of them are independent chambers, a phase-change material 150 is arranged in the heat storage area 110, a first liquid heat exchange medium 141 is arranged in the heat exchange area 120, the heat storage area 110 and the heat exchange area 120 can exchange heat, the water pipe 400 passes through the heat exchange area 120, and the two ends of the water pipe 400 are respectively a live water inlet end 410 and a live water outlet end 420. The outlet end 420, the live water inlet end 410 is the end of the water pipe 400 close to the live water inlet, the live water outflow end 420 is the end of the water pipe 400 close to the live water outflow, and the first heating module 300 is arranged in the heat storage area 110 and / or the heat exchange area 120 to heat the phase change material 150 and / or the first liquid heat exchange medium 141, wherein a side of the heat exchange area 120 close to the empty barrel area 130 is provided with a guide pipe 610 connected to the empty barrel area 130, so as to allow the first liquid heat exchange medium 141 to circulate between the heat exchange area 120 and the empty barrel area 130.

[0042] Specifically, the box 100 includes a heat storage area 110, a heat exchange area 120 and an empty barrel area 130 which are arranged in sequence, and the heat storage area 110, the heat exchange area 120 and the empty barrel area 130 are all independent chambers. The heat storage area 110 is provided with a phase change material 150 for storing heat. The heat storage area 110 and the heat exchange area 120 can exchange heat, specifically, they can exchange heat through the flow of the first liquid heat exchange medium 141. The water pipe 400 is arranged through the heat exchange area 120. According to the water flow direction of the water pipe 400, one end of the water pipe 400 is defined as the live water inlet end 410, and the other end is the live water outflow end 420 of the water pipe 400. The live water flows in through the live water inlet end 410 of the water pipe 400 and flows out through the live water outflow section of the water pipe 400. The heating is completed during the flow process, that is, live water heating. The first heating module 300 is disposed in the heat storage area 110 and / or the heat exchange area 120 to heat the phase change material 150 and / or the first liquid heat exchange medium 141. A flow guide pipe 610 connected to the empty barrel area 130 is disposed on the side of the heat exchange area 120 close to the empty barrel area 130 to allow the first liquid heat exchange medium 141 to flow between the heat exchange area 120 and the empty barrel area 130. Corresponding solenoid valves and other components can be designed between the heat storage area 110 and the heat exchange area 120, and between the heat exchange area 120 and the empty barrel area 130 according to design requirements to limit the flow direction and flow rate of the first liquid heat exchange medium 141, which will not be described in detail here.

[0043] The working principle of the above structure is:

[0044] Phase change material 150 heat storage stage: the first heating module 300 works to heat the first liquid heat exchange medium 141, the first liquid heat exchange medium 141 heats the phase change material 150, the phase change material 150 absorbs the heat and stores the heat.

[0045] Cold water heating stage: The first liquid heat exchange medium 141 continuously absorbs the heat stored in the phase change material 150, and the first liquid heat exchange medium 141 continuously heats the water pipe 400 in contact with it, and the water pipe 400 transfers the heat absorbed by it to the running water flowing in the water pipe 400 to complete the heating of the running water. During the heating process, the first liquid heat exchange medium 141 that absorbs the heat is controlled to flow into the empty barrel area 130, and the high-temperature first liquid heat exchange medium 141 in the heat storage area 110 will flow to the heat exchange area 120 to ensure the stability of the temperature of the first liquid heat exchange medium 141 in the heat exchange area 120, thereby ensuring the stability of the outlet water temperature. In addition, when the heat in the phase change material 150 is consumed in large quantities, there is still the first liquid heat exchange medium 141 with residual temperature in the empty barrel area 130. The first liquid heat exchange medium 141 flows back to the heat exchange area 120 and can also be used to heat warm water for other purposes.

[0046] Other possible working principles:

[0047] When the electricity consumption is low, the first heating module 300 works, starts the heat storage phase of the phase change material 150, and completes the low-price heat storage. When using hot water, when the phase change material 150 stores heat, the cold water heating phase is started to heat the running water. During long-term use, when the phase change material 150 cannot meet the temperature requirement for heating the living water during the heating process, the first 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 first 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 150, and the phase change material 150 stores the heat. In the subsequent use of hot water, whether the water heater is turned off or the first heating module 300 is turned off after the phase change material 150 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.

[0048] In addition, when the flow exchange between the heat exchange area 120 and the empty barrel area 130 is large, and the second water pump 620 and the guide pipe 610 cannot meet the demand, a return pipe 800 can be set between the heat exchange area 120 and the empty barrel area 130 to facilitate the circulation of the first liquid heat exchange medium 141 between the heat exchange area 120 and the empty barrel area 130.

[0049] 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 can be 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 first heating module 300 to monitor the temperature of the first liquid heat exchange medium 141 and / or the phase change material 150 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 first 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 is 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.

[0050] In some embodiments, the electric water heater further comprises a first water pump 500, the first water pump 500 having a water pump inlet and a water pump outlet, the water pump inlet and the water pump outlet are both connected to the housing 100, so as to pump the first liquid heat exchange medium 141 to circulate in the heat storage area 110 and the heat exchange area 120. The first water pump 500 can be arranged outside the housing 100 or inside the housing 100 as required, so as to ensure that it can pump the first liquid heat exchange medium 141 to circulate in the heat storage area 110 and the heat exchange area 120. In this embodiment, the first water pump 500 is arranged inside the housing 100. On the one hand, since the first liquid heat exchange medium 141 only circulates inside the electric water heater, it will not produce much scale to affect the normal use of the first water pump 500. On the other hand, arranging the first water pump 500 inside the housing 100 can improve the integrity of the electric water heater and facilitate the installation and transportation of the electric water heater.

[0051] In some embodiments, the flow guide pipe 610 is provided with a second water pump 620, and the second water pump 620 is used to transport the first liquid heat exchange medium 141 to circulate between the heat exchange area 120 and the empty barrel area 130. Through the above structure, the second water pump 620 can control the circulation direction of the first liquid heat exchange medium 141 in the heat exchange area 120 and the empty barrel area 130. In addition, a second heating module 700 can be set in the empty barrel area 130. On the basis of the above structure, after the first liquid heat exchange medium 141 that has been cooled due to the absorption of heat is pumped into the empty barrel area 130 by the second water pump 620, the second heating module 700 in the empty barrel area 130 heats the first liquid heat exchange medium 141 in the empty barrel area 130, and after the temperature of the first liquid heat exchange medium 141 is heated to the standard, it is introduced into the heat exchange area 120 again for circulation, thereby improving the use time of the electric water heater and improving the utilization rate of the pre-heated first liquid heat exchange medium 141.

[0052] In some embodiments, in order to allow the user to intuitively observe the running water flowing in the water pipe 400, the housing 100 is at least partially transparent in the heat exchange area 120 to form an observation portion, and the portion of the water pipe 400 exposed to the observation portion is made of transparent material for observing the water flow inside the water pipe 400. In this embodiment, the housing 100 is made of transparent materials along the arrangement route of the water pipe 400, so as to allow the user to intuitively observe the process of the running water inside the water pipe 400 being heated and flowing out to the greatest extent. Regarding the transparent material of the water pipe 400, it can be made of glass or other polymer transparent materials with good thermal conductivity and high stability. In addition, in order to ensure the thermal insulation performance of the housing 100, the observation portion can adopt a double-layer glass structure or other structures with good thermal insulation performance to ensure the thermal insulation performance of the housing 100.

[0053] In some embodiments, in order to improve the heat energy exchange rate between the water pipe 400 and the first liquid heat exchange medium 141, the water pipe 400 is provided with a heat extraction structure 430 to increase the contact area between the water pipe 400 and the first liquid heat exchange medium 141. The specific setting method of the heat extraction structure 430 can be selected to set fins, or the water pipe 400 located inside the box body 100 can be set as a spirally curved pipeline to increase the contact area between the water pipe 400 and the first liquid heat exchange medium 141.

[0054] Example 2

[0055] Based on Example 1, Figure 1 As shown, a heat storage pipeline 210 is provided in the heat storage area 110 , the phase change material 150 is filled in the heat storage pipeline 210 , and the first liquid heat exchange medium 141 immerses the heat storage area 110 and the heat exchange area 120 .

[0056] Specifically, the phase change material 150 is arranged in the heat storage pipeline 210, which is convenient for the installation and sealing of the phase change material 150. When the box body 100 is designed, it is possible to achieve non-direct contact between the first liquid heat exchange medium 141 and the phase change material 150 without setting a barrier in the heat storage area 110 and the heat exchange area 120, thereby broadening the selection range of the material of the first liquid heat exchange medium 141 and the material of the phase change material 150.

[0057] The working principle of this embodiment:

[0058] Heat storage stage of the phase change material 150: the first heating module 300 heats the first liquid heat exchange medium 141, and the heat of the first liquid heat exchange medium 141 is transmitted to the phase change material 150 in the heat storage pipeline 210 through the heat storage pipeline 210, and the phase change material 150 stores the heat. During this period, the water pump works to mix the first liquid heat exchange medium 141 to ensure the uniformity of the temperature of the first liquid heat exchange medium 141, thereby improving the efficiency of the phase change material 150 in absorbing heat.

[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 150 in the heat storage pipeline 210, and the water pump will continue to work to accelerate the mixing of the temperature of the first liquid heat exchange medium 141, so as to complete the continuous heating of the live water in the water pipe 400. The use of the empty barrel area 130 is the same as in Example 1, and will not be repeated here.

[0060] Similarly, when the flow exchange between the heat exchange area 120 and the empty barrel area 130 is large, and the second water pump 620 and the guide pipe 610 cannot meet the demand, a return pipe 800 can be set between the heat exchange area 120 and the empty barrel area 130 to facilitate the circulation of the first liquid heat exchange medium 141 between the heat exchange area 120 and the empty barrel area 130.

[0061] In addition, the heat storage pipeline 210 can be set to a corresponding shape as needed, and can be optionally arranged in a curved coil inside the box 100, similar to a coil-type design, or multiple heat storage pipelines 210 can be set, and arranged in parallel or staggered inside the box 100. Regardless of which of the above settings is used, the contact area between the heat storage pipeline 210 and the first liquid heat exchange medium 141 can be increased, thereby improving the heat exchange efficiency.

[0062] When the heat storage area 110 and the heat exchange area 120 are both provided with independent chambers, the circulation flow of the first liquid heat exchange medium 141 between the heat storage area 110 and the heat exchange area 120 can be realized by a water pump in cooperation with a pipeline. For example, the water pump and the pipeline are both connected to the heat storage area 110 and the heat exchange area 120. When the water pump is working, the chamber on the side of the water pump outlet is subjected to water pressure, and the first liquid heat exchange medium 141 inside it will flow into the other chamber through the pipeline.

[0063] Example 3

[0064] Based on Example 1, Figure 2 and Figure 3 As shown, a heat exchanger is provided in the housing 100. In this embodiment, the heat exchanger is a coil heat exchanger 220. Of course, the heat exchanger may also be a heat exchanger with a better thermal conductivity. The coil heat exchanger 220 passes through the cavity wall of the heat storage area 110 and the cavity wall of the heat exchange area 120, so that the coil heat exchanger 220 spans the heat storage area 110 and the heat exchange area 120. A water pump is installed on the pipeline of the coil heat exchanger 220 to drive the second liquid heat exchange medium 142 in the coil heat exchanger 220 to flow.

[0065] Specifically, the coil heat exchanger 220 is arranged inside the housing 100, and the coil heat exchanger 220 passes through the cavity wall of the heat storage area 110 chamber and the cavity wall of the heat exchange area 120 chamber, so that the coil heat exchanger 220 spans the heat storage area 110 and the heat exchange area 120, ensuring the heat exchange between the heat storage area 110 and the heat exchange area 120. The above structure isolates the direct contact between the phase change material 150 and the first liquid heat exchange medium 141 and the first liquid heat exchange medium 142, so as to facilitate the installation and sealing of the phase change material 150. On the basis that the first liquid heat exchange medium 141 and the phase change material 150 are not in direct contact, the material selection space of the first liquid heat exchange medium 141 and the material of the phase change material 150 can be increased. The water pump 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.

[0066] Furthermore, the coil heat exchanger 220 includes a coil liquid inlet 221, a coil pipe section 222 and a coil liquid outlet 223 connected in sequence, the coil pipe section 222 is embedded and installed in the phase change material 150, and the coil liquid inlet 221 and the coil liquid outlet 223 are arranged in the heat exchange zone 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 zone 120, and the second liquid heat exchange medium 142 is the same as the first liquid heat exchange medium 141; the first water pump 500 is used to pump the first liquid heat exchange medium 141 to circulate in the coil heat exchanger 220 and the heat exchange zone 120.

[0067] Working principle of open circulation piping structure:

[0068] Since the second liquid heat exchange medium 142 is the same as the first liquid heat exchange medium 141 , the first liquid heat exchange medium 141 is used below to refer to the first liquid heat exchange medium 141 and the second liquid heat exchange medium 142 .

[0069] Phase change material 150 heat storage stage: The first heating module 300 first heats the first liquid heat exchange medium 141 in the heat exchange area 120. Subsequently, through the action of the water pump, the first liquid heat exchange medium 141 enters the coil heat exchanger 220 from the coil liquid inlet 221, flows through the coiled pipe section 222, flows out from the coil liquid outlet 223, and then returns to the heat exchange area 120. When the first liquid heat exchange medium 141 flows through the coiled pipe section 222, it transfers part of the heat it carries to the phase change material 150, so that the phase change material 150 absorbs heat and stores heat.

[0070] Cold water heating stage: When the water circuit of the water pipe 400 is opened and the water pump is started, the live water in the water pipe 400 will flow through and be immersed in the first liquid heat exchange medium 141. Through this process, the live water absorbs heat from the first liquid heat exchange medium 141 and completes the heating. As the live water continues to flow in, the water pump circulates the first liquid heat exchange medium 141 that has absorbed heat, so that it absorbs the stored heat from the phase change material 150 during the flow process, thereby realizing the continuous replenishment of the heat of the first liquid heat exchange medium 141. In this way, it is ensured that the live water that continuously flows into the water pipe 400 is heated. The utilization of the empty barrel area 130 is the same as in Example 1 and will not be elaborated here.

[0071] In addition, when the flow exchange between the heat exchange area 120 and the empty barrel area 130 is large, and the second water pump 620 and the guide pipe 610 cannot meet the demand, a return pipe 800 can be set between the heat exchange area 120 and the empty barrel area 130 to facilitate the circulation of the first liquid heat exchange medium 141 between the heat exchange area 120 and the empty barrel area 130.

[0072] In other embodiments, the coil heat exchanger 220 is a closed-loop pipeline structure, the first liquid heat exchange medium 141 and the second liquid heat exchange medium 142 are different heat exchange mediums, and a portion of the 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 first water pump 500 is used to pump the second liquid heat exchange medium 142 in the coil heat exchanger 220 to circulate.

[0073] Specifically, the coil heat exchanger 220 is filled with a second liquid heat exchange medium 142, and the first liquid heat exchange medium 141 is arranged in the heat exchange area 120. Part of the pipe section of the coil heat exchanger 220 is located in the heat exchange area 120 and immersed in the first liquid heat exchange medium 141. The water pump is used to pump the second liquid heat exchange medium 142 in the coil heat exchanger 220 for circulation. Among them, 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 can be selected. In this embodiment, the closed circulation pipeline structure is to connect the coil liquid inlet 221 and the coil liquid outlet 223 of the coil heat exchanger 220 to the coil liquid inlet 221 and the coil liquid outlet 223 of the water pump respectively, so as to realize the circulation of the second liquid heat exchange medium 142 in the coil heat exchanger 220.

[0074] The working principle of the above structure is:

[0075] Phase change material 150 heat storage stage: The first heating module 300 heats the first liquid heat exchange medium 141, and then the heat of the first liquid heat exchange medium 141 is transferred to the second liquid heat exchange medium 142 inside the coil through the coil heat exchanger 220 located in the heat exchange area 120. The water pump 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 heat to the phase change material 150 through the coil heat exchanger 220, and the phase change material 150 absorbs and stores the heat.

[0076] Cold water heating stage: When the live water in the water pipe 400 flows 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 live water, thereby completing the heating of the live water. At the same time, the second liquid heat exchange medium 142 transfers heat to the first liquid heat exchange medium 141 through the coil heat exchanger 220 to keep the temperature of the first liquid heat exchange medium 141 stable. During this period, the water pump continues to work to ensure that 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 150 to keep its own temperature stable, thereby ensuring that the temperature of the first liquid heat exchange medium 141 in contact with the coil heat exchanger 220 is stably maintained, thereby ensuring the heating effect of the live water in the water pipe 400. The use of the empty barrel area 130 is the same as in Example 1 and will not be repeated here.

[0077] In addition, when the flow exchange between the heat exchange area 120 and the empty barrel area 130 is large, and the second water pump 620 and the guide pipe 610 cannot meet the demand, a return pipe 800 can be set between the heat exchange area 120 and the empty barrel area 130 to facilitate the circulation of the first liquid heat exchange medium 141 between the heat exchange area 120 and the empty barrel area 130.

[0078] The designer can, as required, place part of the coiled pipe section 222 through the adjacent cavity walls of the heat storage area 110 and the heat exchange area 120 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.

[0079] Example 4

[0080] On the basis of Example 1, the heat storage pipelines 210 are divided into multiple groups and arranged in parallel or staggered in the heat storage area 110. In this embodiment, multiple groups of heat storage pipelines 210 are arranged in parallel, and the heat storage area 110 is divided into multiple independent chambers, and each independent chamber contains at least one group of heat storage pipelines 210. Each independent chamber is provided with a pipeline connected to the first water pump 500, so that the first water pump 500 drives the first liquid heat exchange medium 141 to circulate between the corresponding chambers of the heat exchange area 120 and the heat storage area 110. A return pipe 800 is provided between the empty barrel area 130 and the heat storage area 110, and the return pipe 800 is provided with multiple branches for correspondingly connecting each independent chamber to ensure the circulation of the first liquid heat exchange medium 141 in the independent chambers in a single heat storage area 110. In this embodiment, the heat storage area 110 is divided into three independent chambers, which are hereinafter referred to as the first heat storage chamber, the second heat storage chamber and the third heat storage chamber. One end of the return pipe 800 is connected to the empty barrel area 130, and the other end is connected to three branch pipes to respectively connect the first heat storage chamber, the second heat storage chamber and the third heat storage chamber. In addition, the return pipe 800 can also be provided with a power device such as a water pump for driving water circulation according to needs.

[0081] The working principle of the above structure is:

[0082] Phase change material 150 heat storage stage: the first heating module 300 works to heat the first liquid heat exchange medium 141, and the first water pump 500 repeatedly pumps the first liquid heat exchange medium 141 in the first heat storage chamber, the second heat storage chamber, and the third heat storage chamber into the heat exchange area 120, and then repeatedly transports the first liquid heat exchange medium 141 heated in the heat exchange area 120 to the first heat storage chamber, the second heat storage chamber, and the third heat storage chamber, so as to complete the heat storage of the phase change material 150 in the first heat storage chamber, the second heat storage chamber, and the third heat storage chamber;

[0083] Cold water heating stage: the first liquid heat exchange medium 141 in the heat exchange area 120 heats the live water flowing through the water pipe 400. When the temperature of the first liquid heat exchange medium 141 in the heat exchange area 120 drops to a level that cannot meet the heating demand, it is pumped into the empty barrel area 130 by the second water pump 620. At the same time, the first water pump 500 extracts the first liquid heat exchange medium 141 in the first heat storage chamber to replenish the heat exchange area 120 to ensure the uniformity of the processing temperature. When the heat of the phase change material 150 in the first heat storage chamber is consumed to a level that cannot meet the heating demand, the first water pump 500 starts to extract the first liquid heat exchange medium 141 in the second heat storage chamber to replenish the heat exchange area 120. Similarly, the first liquid heat exchange medium 141 in the first heat storage chamber, the second heat storage chamber and the third heat storage chamber is circulated to complete the live water heating.

[0084] It should be noted that this embodiment can also be combined with the second heating module 700 in Example 1. After the first liquid heat exchange medium 141 entering the empty barrel area 130 is supplemented with heat, it can be directly discharged to the empty barrel area 130, or it can be discharged to the corresponding first heat storage chamber, second heat storage chamber or third heat storage chamber, and then transported to the heat exchange area 120 through the first heat storage chamber, second heat storage chamber or third heat storage chamber. When passing through the first heat storage chamber, second heat storage chamber or third heat storage chamber, the phase change material 150 is simultaneously supplemented with heat, thereby completing a circulation mode for long-term use of the water heater.

[0085] As another practicable method, the first liquid heat exchange medium 141 may be heated by the first heating module 300 and then replenished to the corresponding first heat storage chamber, second heat storage chamber or third heat storage chamber through the first water pump 500 to replenish the heat of the phase change material 150.

[0086] As another practicable manner, corresponding heating modules may be provided in the first heat storage chamber, the second heat storage chamber or the third heat storage chamber. When the heat stored in the phase change material 150 in the first heat storage chamber, the second heat storage chamber or the third heat storage chamber cannot meet the heating demand, the heating module is turned on to supplement the heat of the phase change material 150 that cannot meet the heating demand while consuming the heat stored in the phase change material 150 in other heat storage chambers.

[0087] In addition, when the flow exchange between the heat exchange area 120 and the empty barrel area 130 is large, and the second water pump 620 and the guide pipe 610 cannot meet the demand, a return pipe 800 can be set between the heat exchange area 120 and the empty barrel area 130 to facilitate the circulation of the first liquid heat exchange medium 141 between the heat exchange area 120 and the empty barrel area 130.

[0088] 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 split barrel-type electric water heater, characterized in that: include: A box body, the box body includes a heat storage area, a heat exchange area and an empty barrel area, and all of them are independent chambers, 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 passes through the heat exchange zone, the two ends of the water pipe are respectively a live water inlet end and a live water outlet end, the live water inlet end is an end of the water pipe close to the live water inlet, and the live water outlet end is an end of the water pipe close to the live water outlet; A first heating module, which is disposed in the heat storage area and / or the heat exchange area to heat the phase change material and / or the first liquid heat exchange medium; Wherein, a flow guide pipe communicating with the empty barrel area is provided on one side of the heat exchange area close to the empty barrel area, so as to allow the first liquid heat exchange medium to flow between the heat exchange area and the empty barrel area.

2. A phase-change split barrel-type electric water heater according to claim 1, characterized in that: It also includes a first water pump, which has a water pump inlet and a water pump outlet. The water pump inlet and the water pump outlet are both connected to the box body to pump the first liquid heat exchange medium to circulate in the heat storage area and the heat exchange area.

3. A phase-change split barrel electric water heater according to claim 2, characterized in that: The guide pipe is provided with a second water pump, and the second water pump is used to transport the first liquid heat exchange medium to circulate between the heat exchange area and the empty barrel area.

4. A phase-change split barrel-type 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, and the first liquid heat exchange medium immerses the heat storage area and the heat exchange area.

5. A phase-change split barrel type electric water heater according to claim 1, characterized in that: A heat exchanger is provided in the box body, and the heat exchanger passes through the cavity wall of the heat storage area chamber and the cavity wall of the heat exchange area chamber, so that the heat exchanger spans the heat storage area and the heat exchange area. A first water pump is installed on the pipeline of 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.

6. A phase-change split barrel-type 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, and 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; the first water pump is used to pump the first liquid heat exchange medium to circulate in the coil heat exchanger and the heat exchange area.

7. A phase-change split barrel-type 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. A phase-change split barrel-type 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 first water pump is used to pump the second liquid heat exchange medium in the coil heat exchanger to circulate.

9. A phase-change split barrel electric water heater according to any one of claims 1 to 8, characterized in that: The box is at least partially transparent in the heat exchange area to form an observation portion, and the portion of the water pipe exposed to the observation portion is made of a transparent material for observing the water flow inside the water pipe.

10. A phase-change split barrel-type electric water heater according to any one of claims 1 to 8, characterized in that: The empty barrel area and / or the flow guide pipe is provided with a second heating module; the empty barrel area is provided with a reflux pipe connected with the heat exchange area and / or the heat storage area.

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