Energy storage cabinet

Abstract

The utility model belongs to the technical field of phase change energy storage, and discloses an energy storage cabinet which comprises a cabinet body, a phase change energy storage material, a heat exchange tube and a turbulent flow mechanism. Wherein a closed accommodating cavity is formed in the cabinet body, and a heat exchange medium inlet and a heat exchange medium outlet which are communicated with the outside and the accommodating cavity are formed in the cabinet body; the accommodating cavity is filled with the phase change energy storage material; the heat exchange pipe is spirally arranged in the containing cavity in the axial direction of the containing cavity, and the two ends of the heat exchange pipe communicate with the heat exchange medium inlet and the heat exchange medium outlet correspondingly. The turbulent flow mechanism comprises a rotating shaft arranged in the containing cavity, paddles arranged on the rotating shaft and a rotating driving piece connected with the rotating shaft and arranged outside the cabinet body, and the rotating driving piece is used for driving the rotating shaft to rotate. According to the energy storage cabinet, by arranging the turbulent flow mechanism, the uniformity of heat conduction between the phase change energy storage material and the heat exchange medium is improved, in addition, the turbulent flow mechanism is simple in structure, small in occupied space and small in influence on the filling amount of the phase change material, and the total energy storage amount is guaranteed to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of phase change energy storage, in particular to an energy storage cabinet. Background Art

[0002] Phase change energy storage cabinets use phase change materials to store and release energy. The energy storage density of phase change energy storage is relatively high, and the heat is mainly distributed near the phase change temperature. Therefore, it is relatively easy to use in practice. For example, based on the energy storage characteristics of phase change materials, low electricity prices in valleys can be effectively used for efficient energy storage. During the day, energy can be released according to the needs of different application scenarios to avoid high electricity prices during the daytime peaks and reduce electricity costs. It is also possible to use the large temperature difference at night in some places to store cold energy and improve energy utilization efficiency.

[0003] The existing phase change energy storage cabinet includes an energy storage box, in which phase change material is placed, and a heat exchange tube extends from the inlet into the energy storage box, is arranged in a spiral in the energy storage box, and then extends out of the energy storage box from the heat exchange medium outlet, and the heat exchange medium flows in the heat exchange tube. Since the phase change material itself has poor thermal conductivity, the internal phase change material conducts heat unevenly and the heat storage efficiency is low. In order to improve the uniformity of heat conduction, a large number of sheet tube fins are set in some phase change energy storage cabinets, but setting too many sheet tube fins will affect the filling amount of the phase change material, and thus affect the total energy storage.

[0004] Therefore, it is urgent to propose an energy storage cabinet to solve the above technical problems. Utility Model Content

[0005] The utility model provides an energy storage cabinet, which improves the uniformity of heat conduction between phase change energy storage material and heat exchange medium by arranging a spoiler mechanism, and the spoiler mechanism has a simple structure, occupies a small space, has little effect on the filling amount of phase change material, and ensures the total energy storage amount to a certain extent.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Energy storage cabinet, including:

[0008] A cabinet body, wherein a sealed accommodating cavity is provided in the cabinet body, and a heat exchange medium inlet and a heat exchange medium outlet are provided on the cabinet body, which are connected with the outside and the accommodating cavity;

[0009] Phase change energy storage material, filled in the accommodating cavity;

[0010] A heat exchange tube is spirally arranged in the accommodating cavity along the axial direction of the accommodating cavity, and two ends of the heat exchange tube are respectively connected to the heat exchange medium inlet and the heat exchange medium outlet;

[0011] The spoiler mechanism includes a rotating shaft arranged in the accommodating cavity, a paddle arranged on the rotating shaft, and a rotating driving member connected to the rotating shaft and arranged outside the cabinet, wherein the rotating driving member is used to drive the rotating shaft to rotate.

[0012] Optionally, the rotating shaft extends along the axial direction of the accommodating cavity, and a plurality of the paddles are provided, and the plurality of paddles are spaced apart along the extending direction of the rotating shaft.

[0013] Optionally, two spoiler mechanisms are provided, and the two spoiler mechanisms are respectively arranged on both sides of the heat exchange tube.

[0014] Optionally, the energy storage cabinet further includes:

[0015] A pressure sensor is arranged on the blade and is used to measure the resistance value encountered by the blade when it rotates;

[0016] A control system is signal-connected to the pressure sensor and the rotating drive member, and the control system is used to control the rotating drive member to stop when the resistance value detected by the pressure sensor exceeds a safety threshold.

[0017] Optionally, the cabinet body includes an outer cabinet body and an inner cabinet body, and the accommodating cavity is provided in the inner cabinet body; the inner wall surface of the outer cabinet body is arranged in one-to-one correspondence with the outer wall surface of the inner cabinet body, and there is a gap between the relative inner wall surfaces and the outer wall surfaces, and an elastic member is provided in the gap, and the two ends of the elastic member are respectively connected to the corresponding inner wall surface and the outer wall surface.

[0018] Optionally, in the gap, a thermal insulation layer is provided on the inner wall surface or the outer wall surface.

[0019] Optionally, heat exchange fins are provided outside the heat exchange tube, and the heat exchange fins are spirally wound around the heat exchange tube.

[0020] Optionally, a plurality of alternately arranged pits and protrusions are provided on the heat exchange fins.

[0021] Optionally, the energy storage cabinet further includes:

[0022] A first three-way valve, wherein the first three-way valve comprises an energy storage inlet, an energy release inlet and a total outlet, and the total outlet is connected to the heat exchange medium inlet;

[0023] A second three-way valve, wherein the second three-way valve comprises an energy storage outlet, an energy release outlet and a total inlet, and the total inlet is connected to the heat exchange medium outlet.

[0024] Optionally, the phase change energy storage material is a solid-liquid phase change material.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides an energy storage cabinet, including a cabinet body, a phase change energy storage material, a heat exchange tube and a spoiler mechanism. When the phase change energy storage material exchanges heat with the heat exchange medium in the heat exchange tube, the rotating drive member of the spoiler mechanism simultaneously drives the rotating shaft to rotate, and the rotation of the rotating shaft causes the blades to rotate synchronously with the rotating shaft. The rotation of the blades can make the phase change energy storage material flow, which can not only improve the efficiency of heat conduction between the phase change energy storage material and the heat exchange medium, but also improve the uniformity of energy storage of the phase change energy storage material, thereby improving the energy storage capacity of the phase change energy storage material. In addition, the spoiler mechanism has a simple structure and occupies a small space, so it has little effect on the filling amount of the phase change energy storage material, and to a certain extent improves the total energy storage amount of the above energy storage cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 It is a structural schematic diagram of an energy storage cabinet provided by an embodiment of the utility model;

[0029] Figure 2 It is a partial schematic diagram of a cross-sectional view of an energy storage cabinet provided in an embodiment of the utility model.

[0030] In the figure:

[0031] 100, cabinet body; 110, outer cabinet body; 120, inner cabinet body; 121, accommodating cavity;

[0032] 200, heat exchange tube;

[0033] 300, spoiler mechanism; 310, rotating shaft; 320, paddle; 330, rotating driving member;

[0034] 400. Pressure sensor;

[0035] 500, elastic parts;

[0036] 600, insulation layer;

[0037] 700, first three-way valve;

[0038] 800. Second three-way valve. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] This embodiment provides an energy storage cabinet, which improves the uniformity of heat conduction between phase change energy storage materials and heat exchange media by setting a spoiler mechanism. In addition, the spoiler mechanism has a simple structure, occupies a small space, has little effect on the filling amount of phase change materials, and ensures the total energy storage amount to a certain extent.

[0044] Specifically, Figure 1 As shown, the energy storage cabinet includes a cabinet body 100 , a phase change energy storage material, a heat exchange tube 200 and a spoiler mechanism 300 .

[0045] The cabinet 100 is provided with a sealed accommodating chamber 121, and the cabinet 100 is provided with a heat exchange medium inlet and a heat exchange medium outlet that connect the outside with the accommodating chamber 121. The phase change energy storage material is filled in the accommodating chamber 121, and the heat exchange tube 200 is arranged along the axial direction of the accommodating chamber 121 ( Figure 1 The heat exchange tube 200 is spirally arranged in the accommodating chamber 121, and the two ends of the heat exchange tube 200 are respectively connected to the heat exchange medium inlet and the heat exchange medium outlet. The heat exchange medium flows in the heat exchange tube 200, and the heat exchange medium exchanges heat with the phase change energy storage material to realize the energy storage and release of the phase change energy storage material. The spoiler mechanism 300 includes a rotating shaft 310 arranged in the accommodating chamber 121, a paddle 320 arranged on the rotating shaft 310, and a rotating driving member 330 connected to the rotating shaft 310 and placed outside the cabinet 100, and the rotating driving member 330 is used to drive the rotating shaft 310 to rotate.

[0046] The rotating drive member 330 can drive the rotating shaft 310 to rotate so that the blades 320 can disturb the phase change energy storage material in the accommodating cavity 121, so as to improve the heat conduction efficiency and heat conduction uniformity between the phase change energy storage material and the heat exchange medium, thereby improving the energy storage capacity of the phase change energy storage material. In addition, the flow disturbance mechanism 300 has a simple structure and occupies a small space, so it has little effect on the filling amount of the phase change energy storage material, and to a certain extent improves the total energy storage amount of the above energy storage cabinet.

[0047] The energy storage cabinet can be used in a variety of environments. Taking the energy storage cabinet providing cooling for users as an example, the working process of the energy storage cabinet is briefly introduced:

[0048] At night, the refrigeration cycle pipeline of the refrigerator is connected to the heat exchange medium inlet and the heat exchange medium outlet of the cabinet 100 respectively, so that the refrigeration cycle pipeline and the heat exchange tube 200 together form a refrigeration cycle loop, and the refrigerant flowing in the heat exchange tube 200 will exchange heat with the phase change energy storage material, and store the cold energy in the phase change energy storage material. In addition, during the energy storage process, before the phase change energy storage material undergoes a phase change, the disturbance mechanism 300 is started to disturb the phase change energy storage material, thereby improving the energy storage uniformity of the phase change energy storage material.

[0049] During the day, the heat exchange medium inlet and the heat exchange medium outlet of the cabinet 100 are respectively connected to the cooling pipe for supplying cooling to the user, so that the heat exchange tube 200 becomes a section of the cooling pipe. When the substance (such as water) in the cooling pipe for supplying cooling to the user flows through the heat exchange tube 200, the phase change energy storage material will release the cold energy to cool down the substance for supplying cooling, so as to achieve the purpose of supplying cooling to the user.

[0050] By using energy storage cabinets in this way, low-priced valley electricity at night can be effectively utilized for energy storage. Compared with using high-priced peak electricity during the day for direct cooling, it can not only reduce electricity costs, but also alleviate power supply pressure during the day.

[0051] The energy storage cabinet can also be used to recycle industrial waste heat and use the recovered heat to provide heating for users, thereby improving energy utilization and achieving the purpose of protecting the environment and saving energy.

[0052] It is worth noting that, during the process of energy storage and release of the phase change energy storage material, if the phase change energy storage material is in a non-solid form, the flow disturbance mechanism 300 can be used to perform flow disturbance.

[0053] Optionally, continue to see Figure 1 , the energy storage cabinet also includes a first three-way valve 700 and a second three-way valve 800. Among them, the first three-way valve 700 includes an energy storage inlet, an energy release inlet and a total outlet, and the total outlet is connected to the heat exchange medium inlet. The second three-way valve 800 includes an energy storage outlet, an energy release outlet and a total inlet, and the total inlet is connected to the heat exchange medium outlet. When the phase change energy storage material stores energy, the external pipeline is connected to the energy storage inlet and the energy storage outlet respectively, and the energy release inlet and the energy release outlet are closed at this time. When the phase change energy storage material releases energy, the external pipeline is connected to the energy release inlet and the energy release outlet respectively, and the energy storage inlet and the energy storage outlet are closed at this time. Through the first three-way valve 700 and the second three-way valve 800, the energy storage pipeline and the energy release pipeline can be connected simultaneously. Compared with sharing one connection port for energy storage and energy release, it is only necessary to connect the pipeline once, which reduces the labor intensity.

[0054] Optionally, in this embodiment, the phase change energy storage material is a solid-liquid phase change material, which has a wider phase change temperature range, a larger phase change latent heat and a lower cost.

[0055] Optionally, the rotating shaft 310 is arranged along the axial direction ( Figure 1 The blade 320 extends in the direction indicated by the arrow in the middle of the rotating shaft 310 (in the direction indicated by the arrow in the middle of the rotating shaft 310). Such a configuration is the same as the configuration direction of the heat exchange tube 200, and can effectively avoid the heat exchange tube 200 to prevent the blade 320 from interfering with the heat exchange tube 200 when the rotating shaft 310 rotates. In addition, a plurality of blades 320 can be provided, and the plurality of blades 320 are arranged at intervals along the extension direction of the rotating shaft 310. By providing a plurality of blades 320, the turbulence effect can be improved, thereby further improving the heat exchange uniformity between the phase change energy storage material and the heat exchange medium.

[0056] In this embodiment, two flow-disturbing mechanisms 300 are provided, and the two flow-disturbing mechanisms 300 are respectively arranged on both sides of the heat exchange tube 200. Such an arrangement has a better flow-disturbing effect.

[0057] Of course, in other embodiments, the number and arrangement of the spoiler mechanism 300 may be other, and can be arranged according to actual needs, and this application does not make specific limitations.

[0058] It is worth noting that too many spoiler mechanisms 300 should not be provided, as too many spoiler mechanisms 300 will occupy too much space in the accommodating cavity 121, thereby affecting the total filling amount of the phase change energy storage material.

[0059] Preferably, continue to see Figure 1 The energy storage cabinet also includes a pressure sensor 400 and a control system. The pressure sensor 400 is arranged on the blade 320 to measure the resistance value encountered by the blade 320 when it rotates. The control system is signal-connected to the pressure sensor 400 and the rotating drive member 330. The control system is used to control the rotating drive member 330 to shut down when the resistance value detected by the pressure sensor 400 exceeds the safety threshold. Since some phase change energy storage materials are solid-liquid phase change materials, when the phase change energy storage material is in solid form, the rotating shaft 310 will be frozen and unable to rotate. At this time, if the rotating drive member 330 is forcibly started, the rotating drive member 330 may be damaged. Therefore, through the linkage control between the controller, the pressure sensor 400 and the rotating drive member 330, the rotating drive member 330 can be effectively protected.

[0060] It is understandable that the rotation driving member 330 may be, but is not limited to, a motor.

[0061] In this embodiment, the control system can be a centralized or distributed controller. For example, the controller can be a single single-chip microcomputer or a distributed plurality of single-chip microcomputers. The control program can be run in the single-chip microcomputer to control the rotating drive member 330 to realize its function.

[0062] Furthermore, if Figure 1 and Figure 2 As shown, the cabinet 100 includes an outer cabinet 110 and an inner cabinet 120 , and a receiving cavity 121 is defined in the inner cabinet 120 .

[0063] The inner wall surface of the outer cabinet body 110 and the outer wall surface of the inner cabinet body 120 are arranged one by one, and there is a gap between the relative inner wall surfaces and outer wall surfaces. An elastic member 500 is arranged in the gap, and the two ends of the elastic member 500 are respectively connected to the corresponding inner wall surface and outer wall surface.

[0064] Since the volume of the phase change energy storage cabinet can be very large, for example, 4500mm in length, 1000mm in width, and 2000mm in height, the phase change energy storage material filled in the accommodating cavity 121 has a relatively obvious thermal expansion and contraction phenomenon during the phase change process, which will cause the volume of the inner cabinet 120 to change significantly. By setting a gap between the relative inner wall surface and the outer wall surface, it is possible to provide a variable space for the deformation of the inner cabinet 120, thereby improving the structural strength of the above energy storage cabinet. In addition, by setting an elastic member 500 between the relative inner wall surface and the outer wall surface, the elastic performance of the elastic member 500 can be used to keep the inner cabinet 120 in a relatively stable position at all times without shaking in the outer cabinet 110.

[0065] It is understandable that the elastic member 500 may be selected but not limited to a spring.

[0066] Preferably, in order to reduce the heat exchange between the energy storage cabinet and the surrounding environment and improve the energy storage effect, a thermal insulation layer 600 may be provided on the inner wall surface or the outer wall surface.

[0067] Optionally, the material of the thermal insulation layer 600 may be aerogel, which has good thermal insulation effect, is small in size, occupies less space, and has lower cost.

[0068] Furthermore, the heat exchange tube 200 is provided with heat exchange fins, which are spirally wound around the heat exchange tube 200. By providing the heat exchange fins, the heat conduction between the heat exchange medium and the phase change energy storage material can be accelerated, and the heat conduction efficiency is improved. In addition, the heat exchange fins are wound around the heat exchange tube 200, which will not occupy too much space in the accommodating cavity 121, thereby ensuring the filling amount of the phase change energy storage material. It is also possible to more directly achieve energy transfer between the heat exchange medium and the phase change energy storage material.

[0069] Optionally, in this embodiment, a plurality of alternately arranged pits and protrusions are provided on the heat exchange fin 210. By providing the pits and protrusions, the heat exchange area of ​​the heat exchange fin can be increased, thereby improving the heat exchange efficiency between the heat exchange medium and the phase change energy storage material, shortening the energy storage time, and helping to save electricity costs during the energy storage process.

[0070] Optionally, the heat exchange tube 200 may be made of stainless steel, which has high structural strength, corrosion resistance and long service life. The heat exchange fins may be made of copper, which has good thermal conductivity and is conducive to improving heat conduction efficiency.

[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Energy storage cabinet, characterized in that: include: A cabinet (100), wherein a sealed accommodating chamber (121) is provided in the cabinet (100), and a heat exchange medium inlet and a heat exchange medium outlet communicating with the outside and the accommodating chamber (121) are provided on the cabinet (100); A phase-change energy storage material is filled in the accommodating cavity (121); A heat exchange tube (200) is spirally arranged in the accommodating chamber (121) along the axial direction of the accommodating chamber (121), and two ends of the heat exchange tube (200) are respectively connected to the heat exchange medium inlet and the heat exchange medium outlet; The spoiler mechanism (300) comprises a rotating shaft (310) arranged in the accommodating cavity (121), a paddle (320) arranged on the rotating shaft (310), and a rotating driving member (330) connected to the rotating shaft (310) and arranged outside the cabinet (100), wherein the rotating driving member (330) is used to drive the rotating shaft (310) to rotate.

2. The energy storage cabinet according to claim 1, characterized in that: The rotating shaft (310) extends along the axial direction of the accommodating cavity (121), and a plurality of the paddles (320) are provided, and the plurality of paddles (320) are arranged at intervals along the extending direction of the rotating shaft (310).

3. The energy storage cabinet according to claim 2, characterized in that: Two flow-disturbing mechanisms (300) are provided, and the two flow-disturbing mechanisms (300) are respectively arranged on both sides of the heat exchange tube (200).

4. The energy storage cabinet according to claim 1, characterized in that: The energy storage cabinet also includes: a pressure sensor (400), arranged on the blade (320), and used to measure the resistance value encountered by the blade (320) when rotating; A control system is signal-connected to the pressure sensor (400) and the rotating drive member (330), and the control system is used to control the rotating drive member (330) to stop when the resistance value detected by the pressure sensor (400) exceeds a safety threshold.

5. The energy storage cabinet according to claim 1, characterized in that: The cabinet (100) comprises an outer cabinet (110) and an inner cabinet (120), wherein the inner cabinet (120) is provided with the accommodating cavity (121); the inner wall surface of the outer cabinet (110) and the outer wall surface of the inner cabinet (120) are arranged in one-to-one correspondence, and there is a gap between the inner wall surface and the outer wall surface opposite to each other, and an elastic member (500) is provided in the gap, and two ends of the elastic member (500) are respectively connected to the corresponding inner wall surface and the outer wall surface.

6. The energy storage cabinet according to claim 5, characterized in that: In the gap, a heat-insulating layer (600) is provided on the inner wall surface or the outer wall surface.

7. The energy storage cabinet according to claim 1, characterized in that: The heat exchange tube (200) is provided with a heat exchange fin outside, and the heat exchange fin is spirally wound around the heat exchange tube (200).

8. The energy storage cabinet according to claim 7, characterized in that: A plurality of alternately arranged concave pits and convex protrusions are arranged on the heat exchange fins.

9. The energy storage cabinet according to any one of claims 1 to 8, characterized in that: The energy storage cabinet also includes: A first three-way valve (700), the first three-way valve (700) comprising an energy storage inlet, an energy release inlet and a total outlet, the total outlet being in communication with the heat exchange medium inlet; The second three-way valve (800) comprises an energy storage outlet, an energy release outlet and a total inlet, and the total inlet is connected to the heat exchange medium outlet.

10. The energy storage cabinet according to any one of claims 1 to 8, characterized in that: The phase change energy storage material is a solid-liquid phase change material.

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