Phase change material heat exchanger

Abstract

A phase-change material heat exchanger comprises a shell, phase-change materials, heat exchange fins and heat exchange flow channels, the heat exchange flow channels are coiled and circulate in the shell, the heat exchange fins are arranged between the heat exchange flow channels, and the phase-change materials are filled in front of the heat exchange fins, the heat exchange flow channels and the shell. The heat exchange fins are evenly distributed among the heat exchange runners, and the structures of the heat exchange fins are vertically through in the gravity direction. According to the phase-change material heat exchanger, the heat exchange units are closely attached and arranged in an array mode to form the phase-change material heat exchanger, the heat exchange fins in the heat exchange units are of the structural design that the heat exchange fins are vertically through in the gravity direction, the heat conduction efficiency is improved, and the defect that air cannot be automatically exhausted structurally is overcome; and gas residues are prevented from being clamped in the phase-change material to influence the overall heat conduction effect of the heat exchanger.

Description

[Technical field]

[0001] The utility model relates to the technical field of heat exchangers, in particular to the technical field of heat exchangers using phase change materials. [Background technology]

[0002] With the improvement of living standards, there are now various drinking water equipment and water purification equipment for people with different needs to choose from. Whether it is heating or cooling, whether it is fast heating or constant temperature, various functions and effects can be achieved through technical means.

[0003] There is an existing heat storage drinking water device that uses phase change materials to store and release heat to provide heated drinking water. The solid-liquid phase change energy storage device uses the phase change material (PCM) to absorb heat during the process of melting from the solid phase to the liquid phase, and releases heat during the process of condensing from the liquid phase to the solid phase, thereby solving the problem of heat storage and release. During the operation of the solid-liquid phase change heat storage device, the energy storage material only undergoes physical transformation, so it has good safety, low operation and maintenance costs, good constant temperature phase change characteristics and huge phase change latent heat. At present, users need water heaters to output hot water for bathing, washing, etc. in their lives. Heat pump water heaters using phase change heat storage technology have the advantages of small size, small space occupation, and continuous provision of hot water to users, and have been widely used by users.

[0004] However, in the prior art, due to the spatial arrangement and the material itself, the heat storage utilization rate of the phase change material in the solid-liquid phase change energy storage device is low during the heat exchange process. Since the solid and liquid conversion of the solid-liquid phase change material changes in volume during the heat absorption and heat release process, space cracks will be generated, which will become bubbles when used next time. Therefore, it is necessary to discharge the bubbles periodically to prevent the bubbles from isolating the phase change material from the heat exchanger when used next time. The existing solid-liquid phase change material heat exchange structure has a fragmented and intersecting space and no vertical through-channel, so it is difficult for the bubbles to be discharged automatically, which is defective. The low heat storage utilization rate is mainly due to the structural design of the heat exchanger, which has problems such as poor heat conduction and few heat transfer paths. There are defects in the automatic discharge of gas, which leads to the inclusion of participating gases in the gas, affecting the heat conduction process. [Summary of the invention]

[0005] In view of the shortcomings and problems existing in the existing drinking water equipment, the utility model proposes a phase change material heat exchanger, which improves the heat storage utilization rate of the phase change material and improves the structural design, overcomes the problem of being unable to automatically and smoothly discharge gas, and avoids gas residue being trapped in the phase change material, which affects the heat conduction effect of the overall heat exchanger.

[0006] The utility model relates to a phase change material heat exchanger, comprising a shell, a phase change material, heat exchange fins and a heat exchange channel. The heat exchange channel is coiled and circulated in the shell, and heat exchange fins are arranged between the heat exchange channels. Phase change material is filled between the heat exchange fins, the heat exchange channels and the shell. The heat exchange fins are evenly distributed between several heat exchange channels, and the structure of the heat exchange fins is vertically penetrated up and down along the direction of gravity.

[0007] One of the heat exchange channels and the heat exchange fins corresponding to the heat exchange channel constitute a heat exchange unit. The structure of the heat exchange unit is: a circular hole formed by the heat exchange channel is in the center, and fin branches extending circumferentially are evenly distributed on the circumference of the circular hole, wherein every other fin branch has a number of secondary branches, and the outermost end of the heat exchange fin of each heat exchange unit has an overall rectangular cross-section.

[0008] The heat exchange unit comprises four main branches and four straight-line branches. The four main branches and the four straight-line branches are evenly spaced, and the circumference of each branch is 45° apart.

[0009] The main branch includes bilaterally symmetrical secondary branches, each of which is directly connected to the main branch. The secondary branches include a first secondary branch and a second secondary branch that are at different distances from the heat exchange flow channel.

[0010] The distance between the first secondary branch and the heat exchange channel is smaller than the distance between the second secondary branch and the heat exchange channel.

[0011] The first and second level branches are also in a straight line shape, and are distributed on the left and right sides of the main branch, and are respectively parallel to the straight line branches on both sides of the main branch.

[0012] The second-level branch is "L"-shaped and is distributed on the left and right sides of the main branch. The first section of the "L"-shaped branch is parallel to the first-level branch.

[0013] A plurality of heat exchange units are closely arranged in the shell of the phase change material heat exchanger, and the heat exchange flow channel is coiled and connected to form a complete pipeline passing therethrough, and an inlet end and an outlet end are respectively provided at the beginning and the end of the heat exchange flow channel.

[0014] The utility model relates to a phase change material heat exchanger, characterized in that the phase change material heat exchanger comprises a shell, a phase change material, heat exchange fins and a heat exchange flow channel, the heat exchange flow channel is coiled and circulated in the shell, heat exchange fins are arranged between the heat exchange flow channels, and phase change material is filled between the heat exchange fins, the heat exchange flow channels and the shell, the heat exchange fins are evenly distributed between several heat exchange flow channels, and the structure of the heat exchange fins is vertically penetrated up and down along the direction of gravity.

[0015] One of the heat exchange channels and the heat exchange fins corresponding to the heat exchange channel constitute a heat exchange unit, and the structure of the heat exchange unit is: a circular hole formed by the heat exchange channel is in the center, and fin branches extending circumferentially are evenly distributed on the circumference of the circular hole, wherein every other fin branch has a number of secondary branches, and the outermost ends of the heat exchange fins of each heat exchange unit have an overall square cross-section.

[0016] The heat exchange fins in the heat exchange unit include four main branches and four straight-line branches. The four main branches and the four straight-line branches are evenly spaced, and the circumference of each branch is 45° apart.

[0017] The main branch includes bilaterally symmetrical secondary branches, each of which is directly connected to the main branch. The secondary branches include a first secondary branch and a second secondary branch that are at different distances from the heat exchange flow channel.

[0018] The distance between the first secondary branch and the heat exchange channel is smaller than the distance between the second secondary branch and the heat exchange channel.

[0019] The first and second level branches are also in a straight line shape, and are distributed on the left and right sides of the main branch, and are respectively parallel to the straight line branches on both sides of the main branch.

[0020] The second-level branch is "L"-shaped and is distributed on the left and right sides of the main branch. The first section of the "L"-shaped branch is parallel to the first-level branch.

[0021] A plurality of heat exchange units are closely arranged in the shell of the phase change material heat exchanger, and the heat exchange flow channel is coiled and connected to form a complete pipeline passing therethrough, and an inlet end and an outlet end are respectively provided at the beginning and the end of the heat exchange flow channel.

[0022] The phase change material heat exchanger involved in the utility model adopts a plurality of heat exchange units arranged in a tightly fitting array, and the heat exchange fins in the heat exchange units adopt a structural design that penetrates up and down in the gravity direction, thereby improving the efficiency of heat conduction and overcoming the defect of being unable to automatically exhaust air due to the structure, thereby avoiding gas residues trapped in the phase change material and affecting the overall heat conduction effect of the heat exchanger.

Brief Description of the Drawings

[0023] Figure 1 It is an overall schematic diagram of a phase change material heat exchanger involved in the utility model;

[0024] Figure 2 It is a cross-sectional view of a phase change material heat exchanger involved in the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of a heat exchange unit of a phase change material heat exchanger involved in the utility model;

[0026] Among them: 10, shell; 20, phase change material; 30, heat exchange fins; 31, main branch; 311, first and second level branches; 312, second and second level branches; 32, straight branch; 40, heat exchange flow channel; 50, heat exchange unit. [Specific implementation method]

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "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 should not be understood as a limitation on the present invention.

[0029] Please refer to the attached Figure 1 : A phase change material heat exchanger is shown, which includes a shell 10, a phase change material 20, a heat exchange fin 30 and a heat exchange channel 40. The heat exchange channel 40 is coiled and circulated in the shell 10, and the heat exchange fins 30 are arranged between the heat exchange channels 40. The phase change material is filled between the heat exchange fins 30, the heat exchange channels 40 and the shell 10. The heat exchange fins 30 are evenly distributed between several heat exchange channels 40, and the structure of the heat exchange fins 30 is vertically connected up and down along the direction of gravity.

[0030] One of the heat exchange channels and the heat exchange fins corresponding to the heat exchange channel is a heat exchange unit 50. The structure of the heat exchange unit 50 is: the center is a circular hole formed by the heat exchange channel 40, and the fin branches extending circumferentially are evenly distributed on the circumference of the circular hole, wherein every other fin branch has a number of secondary branches, and the outermost end of the heat exchange fin of each heat exchange unit forms a rectangular shape in overall cross section. The best way is to have a square shape in overall cross section. It is more convenient to arrange the unit array to form the whole heat exchanger.

[0031] The heat exchange fins 30 in the heat exchange unit include four main branches 31 and four straight-line branches 32. The four main branches 31 and the four straight-line branches 32 are evenly spaced, and the circumference of each branch is 45° apart.

[0032] The main branch 31 includes bilaterally symmetrical secondary branches, each of which is directly connected to the main branch 31 , and includes a first secondary branch 311 and a second secondary branch 312 that are at different distances from the heat exchange flow channel.

[0033] The distance between the first secondary branch 311 and the heat exchange channel is smaller than the distance between the second secondary branch 312 and the heat exchange channel.

[0034] The first and second level branches 311 are also in a straight line shape and are distributed on the left and right sides of the main branch 31 , respectively parallel to the straight line branches 32 on both sides of the main branch.

[0035] The second secondary branch 312 is “L”-shaped and is distributed on the left and right sides of the main branch 31 . The first section of the “L”-shaped branch is parallel to the first secondary branch 311 .

[0036] Furthermore, if the structural design requires, the structure can be further refined on the basis of the above, including but not limited to: the number of heat exchange fins can be arranged according to the conventional industrial layout of six, eight, nine, ten, twelve, etc., and more branches can be branched out from each main branch, and after the secondary branch, the secondary branch can extend to the tertiary branch, the quaternary branch, etc. As long as the space can accommodate and the size distribution meets the design requirements, it can be considered.

[0037] A plurality of heat exchange units 50 are closely arranged in the shell 10 of the phase change material heat exchanger. The specific number of heat exchange units 50 required can be designed and arranged according to system parameters, and the external shape of each heat exchange unit 50 remains square, which is convenient for arrangement in the shell 10. The heat exchange flow channel is wound and connected to form a complete pipeline passing therethrough, and an inlet end 41 and an outlet end 42 are respectively provided at the head and tail of the heat exchange flow channel.

[0038] The phase change material heat exchanger involved in the utility model adopts a plurality of heat exchange units arranged in a tightly fitting array, and the heat exchange fins in the heat exchange units adopt a structural design that penetrates up and down in the gravity direction, thereby improving the efficiency of heat conduction and overcoming the defect of being unable to automatically exhaust air due to the structure, thereby avoiding gas residues trapped in the phase change material and affecting the overall heat conduction effect of the heat exchanger.

[0039] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A phase change material heat exchanger, characterized in that: The phase change material heat exchanger includes a shell, a phase change material, heat exchange fins and a heat exchange channel. The heat exchange channel is coiled and circulated in the shell. Heat exchange fins are arranged between the heat exchange channels. Phase change material is filled between the heat exchange fins, the heat exchange channels and the shell. The heat exchange fins are evenly distributed between several heat exchange channels. The structure of the heat exchange fins is vertically connected up and down along the direction of gravity.

2. The phase change material heat exchanger according to claim 1, characterized in that: One of the heat exchange channels and the heat exchange fins corresponding to the heat exchange channel constitute a heat exchange unit. The structure of the heat exchange unit is: a circular hole formed by the heat exchange channel is in the center, and fin branches extending circumferentially are evenly distributed on the circumference of the circular hole, wherein every other fin branch has a number of secondary branches, and the outermost end of the heat exchange fin of each heat exchange unit has an overall rectangular cross-section.

3. The phase change material heat exchanger according to claim 2, characterized in that: The heat exchange fins in the heat exchange unit include four main branches and four straight-line branches. The four main branches and the four straight-line branches are evenly spaced, and the circumference of each branch is 45° apart.

4. The phase change material heat exchanger according to claim 3, characterized in that: The main branch includes bilaterally symmetrical secondary branches, each of which is directly connected to the main branch. The secondary branches include a first secondary branch and a second secondary branch that are at different distances from the heat exchange flow channel.

5. The phase change material heat exchanger according to claim 4, characterized in that: The distance between the first secondary branch and the heat exchange channel is smaller than the distance between the second secondary branch and the heat exchange channel.

6. The phase change material heat exchanger according to claim 5, characterized in that: The first and second level branches are also in a straight line shape, and are distributed on the left and right sides of the main branch, and are respectively parallel to the straight line branches on both sides of the main branch.

7. The phase change material heat exchanger according to claim 5, characterized in that: The second secondary branch is "L" shaped and is distributed on the left and right sides of the main branch, and the first section of the "L" shape is parallel to the first secondary branch.

8. The phase change material heat exchanger according to any one of claims 2 to 7, characterized in that: A plurality of heat exchange units are closely arranged in the shell of the phase change material heat exchanger, and the heat exchange flow channel is coiled and connected to form a complete pipeline passing therethrough, and an inlet end and an outlet end are respectively provided at the beginning and the end of the heat exchange flow channel.

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