Heat exchange device and water heater

Abstract

The utility model discloses a heat exchange device and a water heater, the heat exchange device comprises a heat preservation box body and a heating module arranged in the heat preservation box body, a containing cavity is arranged in the heat preservation box body, and the containing cavity comprises a first cavity section and a second cavity section which are isolated from each other; a first heat exchange medium and a first heat exchange pipe capable of exchanging heat with the first heat exchange medium are arranged in the first cavity section, a phase change material is arranged in the second cavity section, a second heat exchange pipe capable of exchanging heat with the phase change material is arranged in the phase change material, the second heat exchange pipe is a closed pipeline, and at least part of the second heat exchange pipe is arranged in the first cavity section; the first heat exchange medium is used for conducting heat exchange with the second heat exchange pipe located in the first cavity section. The water heater comprises the heat exchange device. According to the heat exchange device and the water heater, the sealed second heat exchange pipe and the heat exchange medium are adopted for heat exchange, water scale impurities in the heat exchange device can be reduced, meanwhile, clean and sanitary running water washing is achieved, energy can be saved, and the water using time can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and in particular to a heat exchange device and a water heater. Background Art

[0002] At present, water heaters are household appliances commonly used in people's daily lives. Among them, electric water heaters are widely used due to their small size, while instant water heaters with instant heating function are used by more users due to their convenience.

[0003] In existing water heaters, a water pump is used to drive the heated hot water into the coil so that the phase change material and the coil can exchange heat. This heat exchange method will produce scale in the coil and the water pump, affecting the heat exchange efficiency of the coil. Under the condition of the same water output, the power and performance requirements of the water pump are very high, and it is also easy to cause the water pump to malfunction or be damaged, resulting in reduced heat exchange efficiency. In addition, existing water heaters generally mix cold water and hot water, and the heated hot water is contaminated by scale, which makes the used water unhygienic and unclean.

[0004] Therefore, there is an urgent need for a heat exchange device and a water heater to overcome the above-mentioned defects. Utility Model Content

[0005] In order to overcome at least one of the defects described in the above-mentioned prior art, one of the purposes of the present invention is to provide a heat exchange device, which can reduce the generation of scale impurities in the heat exchange device, achieve clean and hygienic live water washing, and can save energy and extend water use time.

[0006] The second purpose of the utility model is to provide a water heater with an instant heating function, which can achieve clean and hygienic live water washing, save electricity costs and extend water use time.

[0007] One of the technical solutions adopted by the utility model to solve the problem is:

[0008] A heat exchange device comprises a heat preservation box and a heating module arranged in the heat preservation box, wherein a accommodating cavity is arranged in the heat preservation box, and the accommodating cavity comprises a first cavity section and a second cavity section which are isolated from each other; a first heat exchange medium and a first heat exchange tube which can exchange heat with the first cavity section are arranged in the first cavity section, a phase change material is arranged in the second cavity section, a second heat exchange tube which can exchange heat with the second cavity section is arranged in the phase change material, the second heat exchange tube is a closed pipeline, and at least part of the second heat exchange tube is arranged in the first cavity section; the first heat exchange medium is used to exchange heat with the second heat exchange tube located in the first cavity section.

[0009] Furthermore, the head and tail ends of the second heat exchange tube are connected to form a closed loop, and a second heat exchange medium flows in the closed loop.

[0010] Furthermore, a driving pump is provided in the closed loop, and the driving pump is used to drive the second heat exchange medium to circulate in the closed loop.

[0011] Furthermore, the second heat exchange tube extends in an S-shape, and / or the second heat exchange tube includes a plurality of heat exchange tube segments, the plurality of heat exchange tube segments are arranged in parallel, and at least part of the heat exchange tube segments are arranged in the first cavity segment to increase the outer surface of the second heat exchange tube.

[0012] Furthermore, the heating module is provided in the first cavity section, and the heating module is used to heat the first heat exchange medium.

[0013] Furthermore, two ends of the first heat exchange tube are arranged outside the thermal insulation box, and the two ends of the first heat exchange tube are respectively a water inlet end and a water outlet end, the water inlet end is used for the inflow of cold water, and the water outlet end is used for the outflow of hot water after heat exchange.

[0014] Furthermore, the outer surface of the first heat exchange tube is a non-flat surface, and / or the first heat exchange tube includes a plurality of heating tube segments, both ends of the plurality of heating tube segments are respectively connected to the water inlet end and the water outlet end; the non-flat surface and / or the plurality of heating tube segments are used to increase the heat exchange area between the first heat exchange tube and the first heat exchange medium.

[0015] Furthermore, the portion of the first heat exchange tube disposed inside the heat preservation box extends in a spiral shape to increase the heat exchange area between the first heat exchange tube and the first heat exchange medium.

[0016] Furthermore, the thermal insulation box body includes an outer shell and an inner shell, and the first cavity section and the second cavity section are provided in the inner shell; and thermal insulation material is provided between the outer shell and the inner shell.

[0017] The second technical solution adopted by the utility model to solve the problem is:

[0018] A water heater comprises the above-mentioned heat exchange device.

[0019] In summary, the heat exchange device and water heater provided by the utility model have the following technical effects:

[0020] 1) The heat exchange device is provided with a first cavity section and a second cavity section which are isolated from each other, and the first cavity section is provided with a first heat exchange medium and a first heat exchange tube capable of heat exchange with the first cavity section, and the second cavity section is provided with a phase change material, and the second heat exchange tube capable of heat exchange with the second cavity section is provided with a phase change material. The cavity sections which contain different substances and are independent of each other can reduce the overall pressure and sealing requirements of the thermal insulation box, thereby improving the overall pressure resistance and airtightness of the thermal insulation box;

[0021] 2) The heat exchange device arranges a phase change material in the second cavity section, and a second heat exchange tube capable of heat exchange is arranged in the phase change material, which can not only realize heat storage and extend the water use time of the first heat exchange tube, but also realize peak shifting and valley filling of electricity consumption, thereby reducing electricity costs;

[0022] 3) The heat exchange device exchanges heat between the first heat exchange tube and the first heat exchange medium, so that the water in the first heat exchange tube is completely isolated from the first heat exchange medium, thereby avoiding contamination of the water in the first heat exchange tube and achieving clean and hygienic live water washing; in addition, the first heat exchange medium only flows and transfers heat in the first cavity section, and very little impurities such as scale are generated, ensuring that the second heat exchange tube and the first heat exchange tube can achieve good heat exchange performance with the first heat exchange medium.

[0023] 4) The heat exchange device can prevent the first heat exchange medium from entering the second heat exchange tube by setting the second heat exchange tube as a closed pipeline, thereby reducing the generation of scale impurities in the second heat exchange tube, thereby improving the heat exchange efficiency of the second heat exchange tube. In addition, when a driving pump is set on the second heat exchange tube, the less impurities in the closed pipeline can also reduce damage to the driving pump, thereby reducing the requirements for the performance of the driving pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a heat exchange device according to an embodiment of the utility model.

[0025] The meanings of the reference numerals are as follows:

[0026] 1. Insulation box; 11. First cavity section; 12. Second cavity section; 13. Second heat exchange tube; 2. First heat exchange tube; 14. Isolation wall; 21. Water inlet end; 22. Water outlet end; 23. Heat exchange fins; 3. Drive pump; 4. Heating module. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] 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.

[0029] 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.

[0030] Embodiment 1

[0031] See also Figure 1 The utility model discloses a heat exchange device, which includes a heat preservation box 1 and a heating module 4 arranged in the heat preservation box 1; specifically, the heat preservation box 1 is provided with a receiving cavity, and the receiving cavity includes a first cavity section 11 and a second cavity section 12 which are isolated from each other; wherein, the first cavity section 11 is provided with a first heat exchange medium and a first heat exchange tube 2 which can exchange heat with the first cavity section 11, and the second cavity section 12 is provided with a phase change material, and the phase change material is provided with a second heat exchange tube 13 which can exchange heat with the second cavity section 12. It should be noted that the second heat exchange tube 13 is a closed pipeline, and at least part of the second heat exchange tube 13 is arranged in the first cavity section 11; the first heat exchange medium is used to exchange heat with the second heat exchange tube 13 located in the first cavity section 11.

[0032] On the basis of this structure, when using the heat exchange device of the utility model, during assembly, the second heat exchange tube 13 can be first installed in the second cavity section 12, and the phase change material can be filled to the outer periphery of the second heat exchange tube 13, so that the outer wall of the second heat exchange tube 13 is in contact with the phase change material. Then, part of the second heat exchange tube 13 is arranged in the first cavity section 11, and the first heat exchange tube 2 is inserted into the first cavity section 11, and the part of the first heat exchange tube 2 inserted into the first cavity section 11 is not connected with the second heat exchange tube 13 or the first cavity section 11; then, the first heat exchange medium is arranged in the first cavity section 11, so that the outer periphery of the second heat exchange tube 13 located in the first cavity section 11 and the outer periphery of the first heat exchange tube 2 are in contact with the first heat exchange medium.

[0033] The first heat exchange medium may be water, pure water or oil, etc. This application is described by taking water as the first heat exchange medium.

[0034] When in use, for example, when electricity consumption is low, heat storage can be performed first, that is, the first heat exchange medium is heated by the heating module 4 first, and then the second heat exchange tube 13 located in the first cavity section 11 performs heat exchange with the first heat exchange medium to heat the second heat exchange tube 13, and then the heat is stored in the phase change material by heat exchange with the phase change material. When the cold water of the first heat exchange tube 2 needs to be heated, and when electricity consumption is at a peak, the heating module 4 can be turned off, and the phase change material transfers the stored heat to the second heat exchange tube 13, and the second heat exchange tube 13 performs heat exchange with the first heat exchange medium through the part located in the first cavity section 11 to heat the first heat exchange medium, and then cold water is passed into one end of the first heat exchange tube 2, and the cold water performs heat exchange with the first heat exchange medium through the outer wall of the first heat exchange tube 2, thereby heating the cold water. In this way, the phase change material can extend the water use time of the first heat exchange tube 2 by storing heat, and can also achieve peak shifting and valley filling of electricity consumption, thereby reducing electricity costs.

[0035] Among them, since the heat exchange device of this embodiment exchanges heat with the first heat exchange medium through the first heat exchange tube 2, the water in the first heat exchange tube 2 is completely isolated from the first heat exchange medium, which can effectively avoid the mixing of the first heat exchange medium and the water in the first heat exchange tube 2, ensuring that the first heat exchange tube 2 can achieve clean and hygienic live water washing. In addition, the first heat exchange medium only flows and transfers heat in the first cavity section 11, and very little impurities such as scale are generated, ensuring that the second heat exchange tube 13 and the first heat exchange tube 2 can achieve good heat exchange performance with the first heat exchange medium.

[0036] It should be noted that, since the first heat exchange tube 2 is inserted into the first cavity section 11, and the portion of the first heat exchange tube 2 inserted into the first cavity section 11 is not connected to the second heat exchange tube 13 or the first cavity section 11, when cold water is passed into the first heat exchange tube 2, the cold water only exchanges heat with the first heat exchange medium through the outer wall of the first heat exchange tube 2 and absorbs heat, thereby heating the cold water and achieving live water washing. In this process, live water enters and exits through the first heat exchange tube 2, and the live water does not contact the first heat exchange medium or the second heat exchange tube 13, so it can be avoided that the heated water in the first heat exchange tube 2 is contaminated by the water in the thermal insulation box 1 as the heat exchange medium.

[0037] Among them, the second heat exchange tube 13 can exchange heat with the first heat exchange medium and the phase change material only through its own periphery. In this case, the second heat exchange tube 13 can be made of a metal material with a high thermal conductivity. In addition, a second heat exchange medium can also be arranged in the second heat exchange tube 13, and heat exchange with the first heat exchange medium and the phase change material can be carried out through the flow of the second heat exchange medium; in this case, the second heat exchange tube 13 has two ends, and the two ends can be set as blind ends to form the second heat exchange tube 13 into a closed pipeline; the two ends can also be connected to form a closed loop. In this way, since the second heat exchange tube 13 is a closed pipeline, the second heat exchange medium flows in a closed loop in the second heat exchange tube 13 without contacting or mixing with external substances, which can minimize the appearance of impurities such as scale in the second heat exchange tube 13 and ensure heat exchange efficiency.

[0038] In addition, the present application separates the first cavity section 11 from the second cavity section 12, which can separate the first heat exchange medium from the phase change material, prevent the first heat exchange medium from bubbling the phase change material, and play a decompression role; specifically, the first cavity section 11 and the second cavity section 12 contain different substances respectively and are independent of each other, which can reduce the overall pressure and sealing requirements of the thermal insulation box 1, thereby improving the overall pressure resistance and airtightness of the thermal insulation box 1. By partially arranging the second heat exchange tube 13 in the first cavity section 11 and the other part in the second cavity section 12, heat exchange between the first cavity section 11 and the second cavity section 12 can be achieved. At the same time, it is convenient to set the first cavity section 11 as a transparent cavity, and the part of the first heat exchange tube 2 located in the first cavity section 11 can also be set as a transparent tube section; in this way, visualization of live water washing can be achieved, that is, the user can intuitively see that the water in the first heat exchange tube 2 will not be mixed with the first heat exchange medium in the first cavity section 11, but the water in the first heat exchange tube 2 directly exchanges heat with the first heat exchange medium, realizing clean and hygienic visualized live water washing, and improving the user's visual perception.

[0039] In addition, the heating module 4 can also be used to heat the phase change material or the second heat exchange tube 13. Specifically, when the heating module 4 heats the phase change material, the phase change material stores the heat, and when it is necessary to heat the cold water, the phase change material first exchanges heat with the second heat exchange tube 13 to heat the second heat exchange tube 13, and the second heat exchange tube 13 exchanges heat with the first heat exchange medium through the portion located in the first cavity section 11, thereby heating the first heat exchange medium, and then the first heat exchange tube 2 is passed with cold water, and the cold water exchanges heat with the first heat exchange medium through the outer wall of the first heat exchange tube 2, thereby heating the cold water.

[0040] When the heating module 4 heats the second heat exchange tube 13, the second heat exchange tube 13 exchanges heat with the phase change material and stores heat in the phase change material. When cold water needs to be heated, the phase change material first exchanges heat with the second heat exchange tube 13 to heat the second heat exchange tube 13. The second heat exchange tube 13 exchanges heat with the first heat exchange medium through the portion located in the first cavity section 11, thereby heating the first heat exchange medium. Then, cold water flows into the first heat exchange tube 2, and the cold water exchanges heat with the first heat exchange medium through the outer wall of the first heat exchange tube 2, thereby heating the cold water.

[0041] It should be noted that the energy storage stage and the heating stage in the present application can also be carried out simultaneously. For example, when the heating module 4 heats the first heat exchange medium in the first cavity section 11, the first heat exchange medium exchanges heat with the second heat exchange tube 13 on the one hand to store heat in the phase change material, and on the other hand, the first heat exchange medium can also heat the first heat exchange tube 2, so that the first heat exchange tube 2 can realize cold water in and hot water out.

[0042] The following description is made by taking the example that the heating module 4 is arranged in the first cavity section 11 and heats the first heat exchange medium:

[0043] Furthermore, the head and tail ends of the second heat exchange tube 13 are connected to form a closed loop, and the second heat exchange medium flows in the closed loop.

[0044] The second heat exchange medium may be water, pure water or oil, etc., and its material may be the same as or different from that of the first heat exchange medium.

[0045] Based on this structure, during the energy storage stage, the heating module 4 in the first cavity section 11 heats the first heat exchange medium, and the second heat exchange tube 13 in the first cavity section 11 exchanges heat with the first heat exchange medium, thereby heating the second heat exchange medium in the second heat exchange tube 13, and then the second heat exchange medium flows in a closed loop to continuously bring the heat in the first cavity section 11 to the second cavity section 12, thereby heating the phase change material. During the cold water heating stage, the second heat exchange medium flows in a closed loop to continuously bring the heat in the first cavity section 11 to the second cavity section 12, thereby heating the first heat exchange tube 2.

[0046] In order to speed up the heat exchange efficiency of the second heat exchange medium, the present application can also set a drive pump 3 in the closed loop, and the drive pump 3 is used to drive the second heat exchange medium to circulate in the closed loop. At the same time, since the second heat exchange tube 13 is formed as a closed loop, the drive pump 3 only needs to drive the second heat exchange medium to flow in one direction so that the second heat exchange medium can flow through the first cavity section 11 and the second cavity section 12 successively, which can reduce the performance requirements for the drive pump 3. In addition, the closed loop can prevent the first heat exchange medium from entering the second heat exchange tube 13, thereby reducing the generation of scale impurities in the second heat exchange tube 13, thereby improving the heat exchange efficiency of the second heat exchange tube 13, and the low impurity nature of the closed loop can also reduce damage to the drive pump 3, further reducing the performance requirements for the drive pump 3.

[0047] In addition, when the head and tail ends of the second heat exchange tube 13 are not connected and both are blind ends, the driving pump 3 needs to drive the second heat exchange medium to flow back and forth between the head and tail ends of the second heat exchange tube 13 in forward and reverse directions, which places higher performance requirements on the driving pump 3.

[0048] Furthermore, the second heat exchange tube 13 extends in an S-shape, and / or the second heat exchange tube 13 includes a plurality of heat exchange tube segments, the plurality of heat exchange tube segments are arranged in parallel, and at least part of the heat exchange tube segments are arranged in the first cavity segment 11 to increase the outer surface of the second heat exchange tube 13.

[0049] The outer periphery of the second heat exchange tube 13 is filled with a phase change material, and the second heat exchange tube 13 can exchange heat with the phase change material through the outer wall; therefore, when the second heat exchange tube 13 extends in an S-shaped circuitous manner, the heat exchange area of ​​the second heat exchange tube 13 can be increased, thereby enhancing the heat exchange effect between the second heat exchange tube 13 and the phase change material, so that the heat exchange device can achieve an instant heating function. At the same time, when the second heat exchange tube 13 extends in an S-shaped circuitous manner, the internal space of the second cavity section 12 can be fully utilized.

[0050] In addition, the second heat exchange tube 13 can also be a segmented tube segment, specifically, it includes a plurality of heat exchange tube segments, and each heat exchange tube segment can be a straight tube segment and / or a curved tube segment, and the two ends of the heat exchange tube segment are respectively a first end and a second end. During assembly, the first end of each heat exchange tube segment is connected through a connecting tube segment, and the first end of each heat exchange tube segment is located in the first cavity segment 11, and the second end of each heat exchange tube segment is located in the second cavity segment 12.

[0051] When in use, the second heat exchange medium in the second heat exchange tube 13 is divided into multiple streams and flows into different heat exchange tube segments after heat exchange in the first cavity segment 11, and then heat exchanged with the phase change material in the second cavity segment 12. In this way, since the second heat exchange medium is divided into different heat exchange tube segments for heat exchange, multiple heat exchange tube segments accumulate to form a larger heat exchange outer surface area, which can accelerate the heat exchange efficiency.

[0052] Furthermore, a heating module 4 is provided in the first cavity section 11 , and the heating module 4 is used to heat the first heat exchange medium.

[0053] Among them, the heating module 4 is used to heat the first heat exchange medium and realize heat transfer through heat exchange between the first heat exchange medium and the second heat exchange tube 13; since the heating module 4 is arranged in the first cavity section 11, and the first cavity section 11 and the second cavity section 12 are isolated from each other, when the phase change material stores heat and heats up, the influence of the heat in the second cavity section 12 on the heating module 4 can be reduced.

[0054] Furthermore, both ends of the first heat exchange tube 2 are arranged outside the insulation box 1, and the two ends of the first heat exchange tube 2 are respectively a water inlet end 21 and a water outlet end 22, wherein the water inlet end 21 is used for the inflow of cold water, and the water outlet end 22 is used for the outflow of hot water after heat exchange.

[0055] Based on this structure, when in use, tap water flows into the first heat exchange tube 2 through the water inlet end 21, and exchanges heat with the hot water in the first cavity section 11 through the portion of the first heat exchange tube 2 located in the first cavity section 11, so that the cold water is heated into hot water in the first heat exchange tube 2 and then flows out from the water outlet end 22.

[0056] It should be noted that, see Figure 1 , the first heat exchange tube 2 is arranged in the first cavity section 11 and the part of the first heat exchange tube 2 arranged in the first cavity section 11 is not connected with the second heat exchange tube 13 or the first cavity section 11, so when cold water is passed into the first heat exchange tube 2, the cold water only exchanges heat with the first heat exchange medium through the outer wall of the first heat exchange tube 2 and absorbs heat, thereby heating the cold water and achieving live water washing. In this process, live water enters and exits through the first heat exchange tube 2, and the live water does not contact the first cavity section 11 or the second heat exchange tube 13 of the thermal insulation box 1, so the heated water can be prevented from being contaminated by scale in the first cavity section 11.

[0057] Furthermore, the outer surface of the first heat exchange tube 2 is a non-flat surface, and / or the first heat exchange tube 2 includes multiple heating pipe segments, and both ends of the multiple heating pipe segments are respectively connected to the water inlet end 21 and the water outlet end 22; wherein the non-flat surface and / or multiple heating pipe segments are used to increase the heat exchange area between the first heat exchange tube 2 and the first heat exchange medium.

[0058] Specifically, a plurality of heat exchange fins 23 may be provided on the outer surface of the first heat exchange tube 2 to increase the heat exchange area between the first heat exchange tube 2 and the heat exchange medium; since the first heat exchange tube 2 exchanges heat with the first heat exchange medium through the outer surface, the larger the outer surface area of ​​the first heat exchange tube 2, the larger the contact area between the first heat exchange tube 2 and the first heat exchange medium, and the better the heat exchange effect. In this embodiment, a plurality of heat exchange fins 23 are added to the outer periphery of the first heat exchange tube 2 to increase the heat exchange area between the first heat exchange tube 2 and the first heat exchange medium, so that the tap water in the first heat exchange tube 2 absorbs as much heat of the first heat exchange medium as possible during the distance from the water inlet end 21 to the water outlet end 22, thereby being heated to the required temperature.

[0059] In addition, the first heat exchange tube 2 can also be configured to be connected to multiple heating tube segments. Specifically, the first heat exchange tube 2 includes multiple heating tube segments, and each heating tube segment can be a straight tube segment and / or a curved tube segment, and the two ends of the heating tube segment are respectively the third end and the fourth end; during assembly, the third end of each heating tube segment is connected through a connecting tube segment, and the fourth end of each heating tube segment is connected through another connecting tube segment, and the two connecting tube segments are respectively connected to the water inlet end 21 and the water outlet end 22.

[0060] When in use, cold water in the external water circuit enters the connecting pipe section through the water inlet end 21 of the first heat exchange tube 2. The cold water entering the connecting pipe section is divided into multiple streams and flows into different heating pipe sections. Heat exchange is performed with the heat exchange medium in the first cavity section 11 through the heating pipe section. The heated warm water is collected in another connecting pipe section and then flows out through the water outlet end 22 of the first heat exchange tube 2.

[0061] In this way, since the cold water is diverted to different heating pipe sections for heating, the multiple heating pipe sections accumulate to form a larger heat exchange outer surface area, which can increase the heating efficiency.

[0062] In other embodiments, the portion of the first heat exchange tube 2 disposed inside the thermal insulation box 1 may be extended in a spiral shape to increase the heat exchange area between the first heat exchange tube 2 and the first heat exchange medium.

[0063] The first heat exchange tube 2 is extended in a spiral shape to increase the outer surface of the first heat exchange tube 2, thereby increasing the heat exchange area between the first heat exchange tube 2 and the first heat exchange medium, thereby improving the heat exchange efficiency. In addition, after the first heat exchange tube 2 is extended in a spiral shape, the length of the first heat exchange tube 2 is extended, and the cold water stays in the first cavity section 11 for a longer time after entering the spiral section, and can be in contact with the first heat exchange medium for a longer time, thereby obtaining more heat and improving the heating effect.

[0064] Furthermore, the heat preservation box 1 comprises an outer shell and an inner shell, and the inner shell is provided with the first cavity section 11 and the second cavity section 12. Among them, heat preservation material is provided between the outer shell and the inner shell.

[0065] The heat preservation box body 1 divides the inner tank into a first cavity section 11 and a second cavity section 12 through a partition wall 14, and the partition wall 14 can also be made of heat preservation material.

[0066] Specifically, the thermal insulation material may be a polyurethane foam layer, a polystyrene board or a glass fiber board, etc., which has good thermal insulation and heat insulating properties, can ensure the thermal insulation performance of the thermal insulation box 1 and reduce heat loss.

[0067] In addition, the heating module 4 in this embodiment can be a heating rod, a heating tube, etc.

[0068] Embodiment 2

[0069] Different from the first embodiment, this embodiment discloses a water heater, which includes the heat exchange device of the first embodiment. The specific structure and use principle of the heat exchange device are explained in the first embodiment and will not be described in detail here.

[0070] It should be noted that the water heater in this embodiment can extend the water use time of the first heat exchange tube 2 by adopting the above-mentioned heat exchange device and using phase change materials for heat storage, and can also realize peak shifting and valley filling of electricity consumption, thereby reducing electricity costs. Among them, the tap water of the water pipe only flows in and out of the first heat exchange tube 2, and does not mix with the hot water in the first cavity section 11 for heat exchange, which can prevent the cold water in the first heat exchange tube 2 from being contaminated by scale after being heated, and realize the instant heating function. At the same time, the heat exchange device adopts a closed second heat exchange tube 13 to exchange heat with the heat exchange medium. The second heat exchange medium flows in a closed loop in the second heat exchange tube 13, and does not contact or mix with external substances. It can minimize the appearance of impurities such as scale in the second heat exchange tube 13, and ensure heat exchange efficiency. When a water pump is provided on the second heat exchange tube 13, the performance requirements of the water pump can be reduced.

[0071] In addition, the present application separates the first cavity section 11 from the second cavity section 12, which can separate the first heat exchange medium from the phase change material, prevent the first heat exchange medium from foaming the phase change material, and play a decompression role; specifically, the first cavity section 11 and the second cavity section 12 respectively contain different substances and are independent of each other, which can reduce the overall pressure and sealing requirements of the thermal insulation box 1, thereby improving the overall pressure resistance and airtightness of the thermal insulation box 1. By partially arranging the second heat exchange tube 13 in the first cavity section 11 and the other part in the second cavity section 12, heat exchange between the first cavity section 11 and the second cavity section 12 can be achieved. At the same time, the part of the thermal insulation box 1 corresponding to the first cavity section 11 is set as a visual cavity section, and the part of the first heat exchange tube 2 set in the thermal insulation box 1 is set as a visual tube section, so that the visualization of live water washing can be realized, that is, the user can intuitively see that the water in the first heat exchange tube 2 will not be mixed with the first heat exchange medium in the first cavity section 11, but the water in the first heat exchange tube 2 directly exchanges heat with the first heat exchange medium, thereby realizing clean and hygienic visual live water washing and improving the user's visual perception.

[0072] 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 heat exchange device, characterized in that: It includes a heat preservation box body and a heating module arranged in the heat preservation box body, the heat preservation box body is provided with a accommodating cavity, the accommodating cavity includes a first cavity section and a second cavity section that are isolated from each other; a first heat exchange medium and a first heat exchange tube that can exchange heat with the first cavity section are provided in the first cavity section, a phase change material is provided in the second cavity section, a second heat exchange tube that can exchange heat with the second cavity section is provided in the phase change material, the second heat exchange tube is a closed pipeline, and at least part of the second heat exchange tube is arranged in the first cavity section; the first heat exchange medium is used for heat exchange with the second heat exchange tube located in the first cavity section.

2. The heat exchange device according to claim 1, characterized in that: The head and tail ends of the second heat exchange tube are connected to form a closed loop, and a second heat exchange medium flows in the closed loop.

3. The heat exchange device according to claim 2, characterized in that: A driving pump is provided in the closed loop, and the driving pump is used to drive the second heat exchange medium to circulate in the closed loop.

4. The heat exchange device according to claim 2, characterized in that: The second heat exchange tube extends in an S-shape, and / or the second heat exchange tube includes a plurality of heat exchange tube segments, the plurality of heat exchange tube segments are arranged in parallel, and at least part of the heat exchange tube segments are arranged in the first cavity segment to increase the outer surface of the second heat exchange tube.

5. The heat exchange device according to claim 1, characterized in that: The heating module is disposed in the first cavity section, and the heating module is used to heat the first heat exchange medium.

6. The heat exchange device according to claim 1, characterized in that: Both ends of the first heat exchange tube are arranged outside the heat preservation box, and the two ends of the first heat exchange tube are respectively a water inlet end and a water outlet end, the water inlet end is used for the inflow of cold water, and the water outlet end is used for the outflow of hot water after heat exchange.

7. The heat exchange device according to claim 6, characterized in that: The outer surface of the first heat exchange tube is a non-flat surface, and / or the first heat exchange tube includes multiple heating tube segments, and both ends of the multiple heating tube segments are respectively connected to the water inlet end and the water outlet end; the non-flat surface and / or the multiple heating tube segments are used to increase the heat exchange area between the first heat exchange tube and the first heat exchange medium.

8. The heat exchange device according to claim 6, characterized in that: The portion of the first heat exchange tube disposed inside the heat preservation box extends in a spiral shape to increase the heat exchange area between the first heat exchange tube and the first heat exchange medium.

9. The heat exchange device according to claim 1, characterized in that: The heat-insulating box body comprises an outer shell and an inner shell, wherein the first cavity section and the second cavity section are arranged in the inner shell; and a heat-insulating material is arranged between the outer shell and the inner shell.

10. A water heater, characterized in that: Comprising the heat exchange device as described in any one of claims 1 to 9.

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