Ice storage heat exchange device and air conditioner

Abstract

The utility model provides a kind of ice storage heat exchange device and air conditioner.The ice storage heat exchange device includes: cold accumulator shell (1), cold accumulator shell (1) is filled with cold storage medium;Spiral coil (2), it is arranged in the inside of cold accumulator shell (1), for the circulation of circulating refrigerant;Smooth tube heat exchange pipe (3), it is arranged in the inside of cold accumulator shell (1), with smooth cylindrical surface, for accommodating refrigerant, cylindrical surface is used to form rotatable ice ring (4);Magnetic material, for fusion into ice ring (4) inside;Magnetic field generating device (5), it is arranged in the outside of cold accumulator shell (1), for generating rotating magnetic field, control ice ring (4) inside magnetic material drives ice ring (4) rotation.According to the ice storage heat exchange device of the utility model, it can solve the problem of low heat exchange efficiency under high icing rate condition, while ensuring the uniform growth of ice layer, avoid the risk of system circulating pipeline blockage.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and more specifically, to an ice storage heat exchange device and an air conditioner. Background Technology

[0002] With increasing global focus on optimizing energy structure and rising demands for electricity load management, ice storage technology, as an important peak-shaving and valley-filling measure, has been widely applied in air conditioning systems and energy storage. It utilizes inexpensive electricity to produce ice during off-peak hours, such as at night, and then releases the cooling energy through the melting of the ice during peak hours, such as during the day, to meet cooling needs, thus achieving efficient utilization of electricity resources and energy conservation.

[0003] However, traditional ice storage technology faces certain limitations. While internal melting static ice storage technology is widely favored due to its simple structure, in actual operation, as the ice layer gradually thickens on the heat exchange tube wall, the thermal resistance increases, leading to a significant decrease in heat exchange efficiency. This is because the increased ice thickness reduces the effective contact area between the heat exchange medium and the ice layer, hindering heat transfer. Simultaneously, the uneven growth of the ice layer also causes uneven stress distribution on the tube wall, potentially posing a challenge to the long-term structural integrity of the heat exchange tube.

[0004] External melting ice storage technology attempts to compensate for the shortcomings of internal melting ice storage by forming an ice layer outside the heat exchange medium, theoretically providing higher heat exchange efficiency. However, due to the limitation of the freezing rate, if an excessively high freezing rate is pursued, the growth of ice crystals can easily lead to blockage of the circulation pipes. In particular, when ice crystals grow densely, they can seriously affect the flow of the cooling medium, reduce the reliability and stability of the system, and thus pose a potential threat to the long-term operation of the entire system.

[0005] While existing ice storage technologies each have their advantages, achieving a balance between ideal heat exchange efficiency and system stability is challenging in applications with high freezing rates. On one hand, regardless of whether an internal or external melting system is used, the risk of increased thermal resistance or system blockage at high freezing rates remains. On the other hand, improving heat exchange efficiency requires ensuring the uniformity of ice growth to avoid localized overcooling or overheating, which could negatively impact overall heat exchange performance.

[0006] Therefore, there is an urgent need in both the market and the technology to find a new solution that can address the problem of low heat exchange efficiency under high freezing conditions, while ensuring uniform ice growth and avoiding the risk of blockage in the system's circulation pipes. Utility Model Content

[0007] The main purpose of this invention is to provide an ice storage heat exchange device and an air conditioner that can solve the problem of low heat exchange efficiency under high freezing rate conditions, while ensuring uniform ice growth and avoiding the risk of blockage in the system circulation pipes.

[0008] To achieve the above objectives, according to one aspect of the present invention, an ice storage heat exchange device is provided, comprising:

[0009] The cold storage tank shell is filled with a cold storage medium.

[0010] Spiral coils are installed inside the refrigerant accumulator housing for the circulation of the refrigerant.

[0011] The bare tube heat exchanger is located inside the cold accumulator shell and has a smooth cylindrical surface for containing the refrigerant. The cylindrical surface is used to form a rotatable ice ring.

[0012] Magnetic materials are used to fuse the material into the ice ring.

[0013] A magnetic field generator is installed outside the cold storage shell to generate a rotating magnetic field, which controls the magnetic material inside the ice ring to rotate the ice ring.

[0014] Furthermore, there are multiple bare tube heat exchangers, which are arranged at intervals along the circumference.

[0015] Furthermore, the spiral coil includes an inner coil located at the center of the regenerator shell and multiple outer coils located around the outer periphery of the inner coil. The multiple outer coils are arranged circumferentially around the inner coil and form an annular space with the inner coil. Multiple bare tube heat exchange tubes are located within the annular space.

[0016] Furthermore, the number of outer coils is the same as the number of bare tube heat exchangers, and each bare tube heat exchanger is located between two adjacent outer coils along the circumferential direction.

[0017] Furthermore, the external circulation pipelines connected to the fluid pipelines of the bare tube heat exchanger tube and the spiral coil are independent of each other.

[0018] Furthermore, the magnetic material is magnetic particles, which can be suspended in the cold storage medium and can be evenly distributed within the ice ring when it forms an ice ring.

[0019] Furthermore, the magnetic field generating device includes an alternating magnetic field generator, with one alternating magnetic field generator corresponding to each optical tube heat exchange tube.

[0020] Furthermore, the magnetic material is a nano-magnetic fluid material, which is injected into the ice ring during its formation.

[0021] Furthermore, the magnetic field generating device includes a permanent magnet rotating device, which is located outside the optical tube heat exchange tube and generates a rotating magnetic field by rotating itself.

[0022] Furthermore, the magnetic field strength and rotation frequency of the rotating magnetic field are adjustable.

[0023] According to another aspect of the present invention, an air conditioner is provided, including the above-described ice storage heat exchange device.

[0024] By applying the technical solution of this utility model, the ice storage heat exchange device achieves a highly efficient and uniform heat exchange process under high freezing rate conditions by setting a spiral coil and a smooth tube heat exchange tube inside the cold storage tank shell, and fusing magnetic material within the ice ring formed on the outer periphery of the smooth tube heat exchange tube. Combined with the rotating magnetic field generated by an external magnetic field generator, this achieves the same principle. The smooth cylindrical surface of the smooth tube heat exchange tube promotes uniform adhesion of the ice layer, forming an ice ring during the ice storage process. After the ice ring is formed, it detaches from the smooth tube heat exchange tube and can rotate relative to it. The presence of the magnetic material causes the ice ring to rotate under the drive of the external rotating magnetic field, inducing convective motion of the surrounding cold storage medium, thereby significantly enhancing the heat exchange effect. During the ice melting stage, the interaction between the magnetic material and the rotating magnetic field also promotes the uniform melting of the ice ring, avoiding a decrease in heat exchange efficiency caused by excessively high local thermal resistance. In addition, the rotation of the ice ring also helps prevent blockage of the circulation system caused by uneven ice layer thickening, ensuring the stability of system operation. This technical solution effectively solves the problems of decreased heat exchange efficiency, uneven icing, and high risk of system blockage in existing external melting ice storage technology under high icing rate conditions through non-contact drive, thereby improving the overall performance and efficiency of the ice storage heat exchange system. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of an ice storage heat exchange device according to an embodiment of the present invention is shown;

[0027] Figure 2 A cross-sectional structural schematic diagram of an ice storage heat exchange device according to an embodiment of the present invention is shown;

[0028] Figure 3 It shows Figure 2 A schematic diagram of the BB-direction cross-section;

[0029] Figure 4 A top view of an ice storage heat exchange device according to an embodiment of the present invention is shown.

[0030] The above figures include the following reference numerals:

[0031] 1. Regenerator shell; 2. Spiral coil; 3. Bare tube heat exchanger tube; 4. Ice ring; 5. Magnetic field generating device; 6. Inner coil; 7. Outer coil; 8. Magnetic particles. Detailed Implementation

[0032] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] See also Figures 1 to 4 As shown, according to an embodiment of the present invention, the ice storage heat exchange device includes: a cold storage shell 1, which is filled with a cold storage medium; a spiral coil 2, which is disposed inside the cold storage shell 1 for circulating the refrigerant; a smooth cylindrical heat exchange tube 3, which is disposed inside the cold storage shell 1 and has a smooth cylindrical surface for containing the refrigerant, and the cylindrical surface is used to form a rotatable ice ring 4; a magnetic material for fusing into the ice ring 4; and a magnetic field generating device 5, which is disposed outside the cold storage shell 1 for generating a rotating magnetic field to control the magnetic material inside the ice ring 4 to drive the ice ring 4 to rotate.

[0034] The ice storage heat exchange device achieves efficient and uniform heat exchange under high freezing rate conditions by incorporating a spiral coil 2 and a bare tube heat exchanger 3 inside the cold storage tank shell 1, and fusing magnetic material within an ice ring 4 formed around the bare tube heat exchanger 3. Combined with a rotating magnetic field generated by an external magnetic field generator 5, this system achieves efficient and uniform heat exchange. The smooth cylindrical surface of the bare tube heat exchanger 3 promotes uniform ice adhesion, forming the ice ring 4 during ice storage. After formation, the ice ring 4 detaches from the bare tube heat exchanger 3 and can rotate relative to it. The presence of the magnetic material causes the ice ring 4 to rotate under the drive of the external rotating magnetic field, inducing convection in the surrounding cold storage medium, thus significantly enhancing the heat exchange effect. During the ice melting stage, the interaction between the magnetic material and the rotating magnetic field also promotes the uniform melting of the ice ring 4, avoiding a decrease in heat exchange efficiency due to excessively high local thermal resistance. Furthermore, the rotation of the ice ring 4 helps prevent blockage of the circulation system caused by uneven ice thickness, ensuring the stability of system operation. This technical solution effectively solves the problems of decreased heat exchange efficiency, uneven icing, and high risk of system blockage in existing external melting ice storage technology under high icing rate conditions through non-contact drive, thereby improving the overall performance and efficiency of the ice storage heat exchange system.

[0035] The surface of the smooth tube heat exchanger tube 3 is smooth and has no fin structure, which makes it easy for the ice layer to form regular ice columns on its surface and eventually form an ice ring 4.

[0036] The bare tube heat exchanger tube 3 contains refrigerant. During the ice storage stage, as the ice ring 4 forms, the refrigerant first absorbs heat from the cold storage medium by controlling its temperature, causing the bare tube heat exchanger tube 3 to freeze before the spiral coil 2. This promotes the formation of an ice layer on the surface of the bare tube heat exchanger tube 3, gradually forming ice columns. As the ice storage process continues, the ice columns gradually melt to form a ring-shaped ice layer, which is the ice ring 4, enclosing the bare tube heat exchanger tube 3. After the ice ring 4 is formed, the flow direction of the refrigerant can be adjusted to reverse the flow and release heat, melting the ice layer around the bare tube heat exchanger tube 3. This allows the ice ring 4 to detach from the surface of the bare tube heat exchanger tube 3, enabling it to rotate relative to the tube. During the formation of the ice ring 4, magnetic material is injected into the interior of the ice ring 4, ensuring that the magnetic material is evenly distributed within the ice ring 4.

[0037] In one embodiment, there are multiple light tube heat exchange tubes 3, which are arranged at intervals along the circumference.

[0038] The bare tube heat exchanger 3 employs a design with multiple tubes arranged at circumferential intervals, which effectively improves the overall performance and heat exchange efficiency of the ice storage heat exchange device. Specifically, the circumferentially spaced arrangement of the bare tube heat exchanger 3 allows relatively independent ice columns to form around each tube. These ice columns preferentially freeze on the surface of the bare tube heat exchanger 3 during the solidification process of the cold storage medium, thus forming a complete ice ring 4. The smooth surface of the bare tube heat exchanger 3 facilitates the uniform adhesion and growth of the ice layer, thereby reducing the thermal resistance during ice layer growth and improving heat exchange efficiency.

[0039] The multi-point distribution of the bare tube heat exchanger, combined with the external drive of the magnetic field generator 5, ensures that the magnetic particles 8 within each ice ring are subjected to a uniform magnetic field, thereby guaranteeing that all ice rings rotate synchronously. This synchronously rotating ice ring structure promotes the convective motion of the surrounding cold storage medium, forming a more stable local convection ring and enhancing the heat exchange between the cold storage medium and the heat exchanger tubes. Especially under high freezing rate conditions, it can significantly improve the heat exchange efficiency and operational stability of the entire device. In addition, the rotation of the ice ring 4 also helps to improve the uniformity of the ice layer, avoids the formation of excessively thick local ice layers, reduces the obstruction to the flow of the heat exchange medium, and lowers the risk of system blockage.

[0040] Therefore, the innovative design of the circumferentially spaced heat exchange tubes 3, combined with magnetic field drive, not only improves the heat exchange efficiency during ice storage heat exchange but also effectively solves the stability problem of system operation under high icing rate conditions. This provides strong support for ice storage technology in peak shaving and valley filling, enhancing the efficiency of air conditioning and energy storage systems. This design achieves efficient and uniform heat exchange by optimizing the formation and rotation of the ice ring, while avoiding the increased thermal resistance and system blockage caused by excessively thick ice layers, thus greatly enhancing the application value of the ice storage heat exchange device.

[0041] In one embodiment, the spiral coil 2 includes an inner coil 6 located at the center of the regenerator housing 1 and a plurality of outer coils 7 located around the outer periphery of the inner coil 6. The plurality of outer coils 7 are arranged circumferentially around the inner coil 6 and form an annular space with the inner coil 6. A plurality of bare tube heat exchange tubes 3 are located within the annular space.

[0042] The spiral coil 2 of the ice storage heat exchange device includes an inner coil 6 located at the center of the cold storage shell 1 and multiple outer coils 7 spaced around the outer periphery of the inner coil 6. These outer coils 7 and the inner coil 6 together form an annular space, in which multiple bare tube heat exchange tubes 3 are precisely arranged. This structural design utilizes the characteristics of the bare tube heat exchange tubes 3, making them a preferred location for initial freezing, forming ice columns that gradually melt into an ice ring. The formation of the ice ring 4 not only promotes heat exchange efficiency but also provides a basis for subsequent magnetically controlled convection. The uniformly distributed magnetic material within the ice ring 4, under the action of an external rotating magnetic field, can drive the ice ring 4 to rotate, inducing convection of the surrounding liquid medium and significantly enhancing the heat exchange performance of the spiral coil 2.

[0043] Multiple bare tube heat exchangers 3 are located within an annular space, forming multiple circumferentially uniformly distributed ice rings 4. As the ice rings 4 rotate, they simultaneously drive the flow of the cold storage medium around the inner coil 6 and the outer coil 7. These rings not only independently agitate their respective surrounding cold storage medium but also collectively form a complex multi-point convection network within the annular space. This multi-point convection promotes a wider and more uniform flow of the cold storage medium around the inner coil 6 and the outer coil 7, increasing the heat exchange rate throughout the annular space. The dynamic effect of the rotating ice rings 4 results in a more balanced heat distribution within the cold storage medium, reducing local temperature differences and further improving heat exchange efficiency and the uniformity of ice layer growth.

[0044] In one embodiment, the number of outer coils 7 is the same as the number of bare tube heat exchangers 3, and each bare tube heat exchanger 3 is located between two adjacent outer coils 7 along the circumferential direction.

[0045] In this embodiment, the number of outer coils 7 is the same as the number of bare tube heat exchangers 3. Along the circumferential direction, each bare tube heat exchanger 3 is located between two adjacent outer coils 7. This arrangement makes fuller use of the internal space of the regenerator shell 1. Without affecting the rotation of the ice ring 4, it makes the distribution structure of the bare tube heat exchangers 3 and the spiral coils 2 more compact, further optimizing the heat transfer path of the heat exchange structure. This allows the refrigerant to contact the outer coils 7 more evenly when flowing inside the bare tube heat exchangers 3, promoting the formation and rotation of the ice ring. The staggered arrangement of the bare tube heat exchangers 3 and the outer coils 7 along the circumferential direction not only increases the heat exchange area but also makes the formation of the ice ring more stable and the rotation smoother, effectively improving the heat exchange efficiency and operational stability of the ice storage system. During the rotation of the ice ring, the magnetic material, under the influence of the alternating magnetic field, drives the liquid medium to form convection, accelerating the transfer of cold energy. Simultaneously, this uniform heat transfer distribution avoids localized overcooling or overheating, ensuring the temperature uniformity of the cold storage medium and thus improving the overall energy efficiency ratio of the ice storage system. Furthermore, due to the optimized heat conduction path between the bare tube heat exchanger 3 and the outer coil 7, the system's icing rate is significantly improved. At the same time, the rotational motion of the ice ring 4 helps prevent system blockage, enhancing the system's reliability and ease of maintenance.

[0046] In one embodiment, the external circulation pipelines connected to the fluid pipelines of the bare tube heat exchanger tube 3 and the spiral coil 2 are independent of each other.

[0047] The fluid lines of the bare tube heat exchanger tube 3 and the spiral coil 2 are each connected to independent external circulation lines. This design ensures that the fluid circulation between the two will not interfere with each other, allowing the bare tube to preferentially freeze and form an ice ring, and the spiral coil to fully utilize its high-efficiency heat exchange characteristics. At the same time, during the ice melting stage, the flow direction and flow rate of the refrigerant can be independently controlled to achieve more precise temperature regulation, thereby optimizing the operating efficiency and flexibility of the entire ice storage heat exchange device and ensuring the stability and efficiency of heat exchange under high freezing rate conditions.

[0048] In one embodiment, the magnetic material is magnetic particles 8, which can be suspended in the cold storage medium and can be evenly distributed in the ice ring 4 when forming the ice ring 4.

[0049] In this embodiment, the magnetic material is magnetic particles 8, which can be on the micrometer scale and can be uniformly suspended in the cold storage medium. When the ice ring 4 forms on the surface of the light tube heat exchange tube 3 and gradually fuses, the magnetic particles 8 are uniformly distributed within the ice ring 4. This design allows the magnetic particles 8 to be embedded in the ice ring 4 in the initial stage of its formation, thereby effectively driving the rotation of the ice ring 4 when an external rotating magnetic field is applied subsequently. The rotation of the ice ring 4 drives the flow of the surrounding cold storage medium, promoting convective heat transfer near the spiral coil 2. This not only improves the heat transfer efficiency during ice storage and melting but also ensures the uniformity and stability of ice layer growth. By precisely controlling the distribution of the magnetic material and the strength and frequency of the magnetic field, refined management of the ice storage rate and melting process can be achieved. This avoids the problem of increased thermal resistance caused by excessively thick ice layers in traditional internal melting static ice storage technology, and also overcomes the defects of limited freezing rate and easy clogging in external melting ice storage technology, improving the operating efficiency and reliability of the ice storage system under high freezing rate conditions.

[0050] This high-efficiency ice storage and heat exchange device based on magnetically controlled ice ring convection adopts a non-contact driving method, avoiding the structural complexity and additional energy consumption that may be caused by mechanical stirring, and realizing the enhancement of its convection heat exchange capacity without interfering with the structural integrity of the ice ring 4.

[0051] In one embodiment, the magnetic field generating device 5 includes an alternating magnetic field generator, and one alternating magnetic field generator is provided for each optical tube heat exchange tube 3.

[0052] In this embodiment, the magnetic field generating device 5 includes multiple alternating magnetic field generators, each corresponding to a light tube heat exchange tube 3. Through precise control, these alternating magnetic field generators can generate a rotating magnetic field that acts on the ice ring containing magnetic particles 8, causing the ice ring to rotate. This design avoids direct contact driving, reducing mechanical wear and energy consumption, while enhancing the convection of the liquid medium around the ice ring, significantly improving heat exchange efficiency. During ice storage and melting, the frequency and intensity of the alternating magnetic field are adjustable, thereby achieving dynamic control of the ice ring's rotation speed, optimizing the performance of the entire ice storage system, and ensuring the uniformity and stability of heat exchange under high freezing rate conditions. Furthermore, the introduction of the alternating magnetic field enables non-contact driving, simplifying the system structure and enhancing system reliability and maintenance convenience. In other embodiments not shown, the magnetic field distribution can be further optimized by adjusting the number and layout of the magnetic field generators, achieving more precise control over the ice ring's rotation to adapt to scenarios with different ice storage capacities and heat exchange requirements.

[0053] After the ice ring forms, an external alternating magnetic field device is activated. This device consists of multiple electromagnetic coils arranged around the accumulator shell. By controlling the current frequency and phase, a rotating magnetic field is formed. The magnetic field acts on the magnetic particles 8 inside the ice ring 4, causing them to rotate with the magnetic field and drive the entire ice ring 4 to rotate, thereby inducing convective motion of the liquid around the ice ring 4 and enhancing the heat exchange effect.

[0054] During the ice-melting stage, the alternating magnetic field is stopped, and the refrigerant is circulated in reverse to melt the ice ring from the inside, releasing cold energy. The ice-melting process can also be improved by adjusting the magnetic field strength and frequency to control the rotation speed of the ice ring.

[0055] In one embodiment, the magnetic material is a nanomagnetic fluid material, which is injected into the ice ring 4 during the formation of the ice ring 4.

[0056] In this embodiment, the magnetic material is a nano-magnetic fluid material, which is directly injected into the ice ring 4 during its formation. This design utilizes the unique magnetic response characteristics of the nano-magnetic fluid material, enabling the ice ring 4 to rotate under the influence of an external magnetic field. This enhances the convection of the cold storage medium around the ice ring 4, thereby improving heat exchange efficiency. Compared to the previous embodiment, using nano-magnetic fluid material not only simplifies the process but also potentially results in higher magnetic responsiveness and a more stable magnetic field drive effect. This solution avoids the complex structure and additional energy consumption of traditional mechanical stirring through a non-contact driving method. Simultaneously, the convection effect generated by the rotation of the ice ring 4 achieves efficient and uniform heat exchange under high freezing rate conditions, significantly improving the operational stability and energy utilization of the ice storage system.

[0057] In one embodiment, the magnetic field generating device 5 includes a permanent magnet rotating device, which is disposed outside the light tube heat exchange tube 3 and generates a rotating magnetic field by rotating itself.

[0058] In this embodiment, the magnetic field generating device 5 is a permanent magnet rotating device, located outside the optical tube heat exchange tube 3, which generates a rotating magnetic field through its own rotation. This technical solution avoids the energy consumption problem of alternating electromagnetic devices and simplifies the system structure. The rotational motion of the permanent magnet rotating device drives the magnetic particles 8 or nano-magnetic fluid material inside the ice ring, thereby driving the ice ring 4 to rotate, promoting the convection of the liquid medium around the ice ring 4, and enhancing the heat exchange effect during the ice storage process.

[0059] In this embodiment, the rotation control of the ice ring 4 is achieved by adjusting the rotation speed of the permanent magnet rotating device, which is suitable for scenarios where high control precision is not required. Compared with alternating electromagnetic fields, the magnetic field generated by the permanent magnet rotating device is more stable, reducing the complexity of system operation, while ensuring efficient and uniform icing and melting processes, thus improving the operating efficiency and stability of the ice storage system. In other embodiments not shown in the figure, the distribution and intensity of the magnetic field can be further optimized through different designs and arrangements of the permanent magnet rotating device to adapt to different ice storage needs and working conditions.

[0060] In one embodiment, the magnetic field strength and rotation frequency of the rotating magnetic field are adjustable.

[0061] In this embodiment, both the magnetic field strength and rotation frequency of the rotating magnetic field are adjustable. This design allows for dynamic adjustment of the ice ring's rotation characteristics according to actual working conditions and needs during ice storage and melting, thereby optimizing heat exchange efficiency. Specifically, by changing the magnetic field strength of the external alternating magnetic field, the force on the magnetic particles inside the ice ring can be controlled, thus affecting the speed and force of the ice ring's rotation. Adjusting the rotation frequency, on the other hand, can be coordinated with different stages of ice growth or melting, ensuring that the rhythm of the ice ring's rotation matches the heat exchange process, promoting uniform ice growth and rapid melting. This flexible magnetic field control strategy not only improves the adaptability and controllability of the ice storage heat exchange device but also maintains efficient and stable system operation under different load conditions. Furthermore, adjusting the magnetic field strength and rotation frequency can reduce unnecessary energy consumption, achieving energy conservation and emission reduction goals, which is of great significance for improving the economic efficiency and environmental friendliness of the ice storage system. In other embodiments, if a permanent magnet rotating device is used as the magnetic field source, although the magnetic field is not adjustable, the rotation frequency of the ice ring can be indirectly controlled by adjusting the device's rotation speed to achieve a similar effect.

[0062] In one embodiment, the cold storage medium is a phase change cold storage medium, such as water or other eutectic salt solutions.

[0063] The working process of the ice storage heat exchanger is as follows:

[0064] First, during the pre-cooling preparation stage, the interior of the accumulator shell 1 is filled with an appropriate amount of phase change cold storage medium, usually water or brine, as a carrier for energy storage. At this time, the entire system is in a standby state, waiting for the introduction of the cooling medium to start the cold storage process.

[0065] The cooling medium introduction stage then begins. A low-temperature refrigerant, such as cooled water or refrigerant, is introduced into the spiral coil 2 through an external circulation system. The refrigerant is then introduced into the bare tube heat exchanger 3, or the same refrigerant as the spiral coil 2 can be introduced into the bare tube heat exchanger 3. The fluid lines of the bare tube heat exchanger 3 and the spiral coil 2 can be connected to the same external circulation line or to different external circulation lines, allowing for independent control and facilitating the formation and removal of the ice ring. The low temperature of the refrigerant causes the cold storage medium to cool rapidly. During this process, the bare tube heat exchanger, due to its unique surface properties and layout, becomes the preferred location for ice growth before the spiral coil 2. The ice layer first forms ice columns on the surface of the bare tube heat exchanger 3. These ice columns gradually expand and eventually fuse, forming an ice ring surrounding the bare tube heat exchanger 3, with pre-injected magnetic particles 8 evenly distributed inside.

[0066] Next, the magnetic convection initiation stage begins. The external magnetic field generator is activated, producing a rotating magnetic field. This magnetic field acts on the magnetic particles 8 within the ice ring 4, causing the ice ring 4 to rotate. The rotation of the ice ring 4 drives the flow of the cold storage medium within the annular space, creating localized convection, which greatly enhances heat exchange efficiency and promotes effective storage of cold energy. Simultaneously, this rotation process also contributes to the uniform growth of the ice ring 4, avoiding the problems of ice layer thickening and increased thermal resistance commonly seen in traditional static ice storage processes.

[0067] Once the ice storage reaches the predetermined capacity, the system enters a maintenance phase. During this phase, the magnetic field parameters may be slightly adjusted to maintain the rotation speed of the ice ring within the optimal range, ensuring the stability of the ice layer and continuous, efficient energy storage. This phase can be extended if necessary to adapt to different usage scenarios and cooling requirements.

[0068] When cold energy needs to be released, the device enters the ice-melting stage. The flow direction of the refrigerant in the external circulation system is reversed, introducing a higher-temperature refrigerant that causes the ice ring to melt from the inside, and the cold energy is gradually released into the cold storage medium. During this process, the magnetic field may be removed or adjusted so that it no longer drives the ice ring 4 to rotate, or it may rotate at a suitable speed to facilitate the uniform melting of the ice ring and the stable release of cold energy.

[0069] Finally, when all ice rings 4 have completely melted and the cold storage medium returns to its original state, the system automatically enters standby mode to prepare for the next cold storage cycle. The entire working process not only demonstrates the ability to efficiently store and release cold, but more importantly, it overcomes the challenges of decreased heat exchange efficiency and uneven icing under high icing rates through its unique magnetically controlled rotating ice ring technology, significantly improving heat exchange efficiency and achieving stable operation under high icing rates.

[0070] According to an embodiment of the present invention, the air conditioner includes the ice storage heat exchange device described above.

[0071] Air conditioners, such as household air conditioners or multi-split air conditioners.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0074] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ice storage heat exchange device, characterized in that, include: The cold storage housing (1) is filled with a cold storage medium; Spiral coil (2) is installed inside the cold accumulator housing (1) for the circulation of the refrigerant; The light tube heat exchange tube (3) is disposed inside the cold storage shell (1) and has a smooth cylindrical surface for containing the refrigerant. The cylindrical surface is used to form a rotatable ice ring (4). Magnetic material, used for fusion into the ice ring (4); A magnetic field generating device (5) is installed outside the cold storage housing (1) to generate a rotating magnetic field and control the magnetic material inside the ice ring (4) to drive the ice ring (4) to rotate.

2. The ice storage heat exchange device according to claim 1, characterized in that, There are multiple light tube heat exchange tubes (3), and the multiple light tube heat exchange tubes (3) are arranged at intervals along the circumference.

3. The ice storage heat exchange device according to claim 2, characterized in that, The spiral coil (2) includes an inner coil (6) located at the center of the cold storage shell (1) and a plurality of outer coils (7) located on the outer periphery of the inner coil (6). The plurality of outer coils (7) are arranged circumferentially around the inner coil (6) and form an annular space with the inner coil (6). The plurality of light tube heat exchange tubes (3) are located in the annular space.

4. The ice storage heat exchange device according to claim 3, characterized in that, The number of the outer coils (7) is the same as the number of the bare tube heat exchange tubes (3). Along the circumferential direction, each of the bare tube heat exchange tubes (3) is located between two adjacent outer coils (7).

5. The ice storage heat exchange device according to claim 1, characterized in that, The external circulation pipelines connected to the fluid pipelines of the light tube heat exchange tube (3) and the spiral coil (2) are independent of each other.

6. The ice storage heat exchange device according to claim 1, characterized in that, The magnetic material is magnetic particles (8), which can be suspended in the cold storage medium and can be evenly distributed in the ice ring (4) when the ice ring (4) is formed.

7. The ice storage heat exchange device according to claim 1, characterized in that, The magnetic field generating device (5) includes an alternating magnetic field generator, and each of the optical tube heat exchange tubes (3) is provided with one of the alternating magnetic field generators.

8. The ice storage heat exchange device according to claim 1, characterized in that, The magnetic material is a nano-magnetic fluid material, which is injected into the ice ring (4) when the ice ring (4) is formed.

9. The ice storage heat exchange device according to claim 1, characterized in that, The magnetic field generating device (5) includes a permanent magnet rotating device, which is located outside the light tube heat exchange tube (3) and generates a rotating magnetic field by rotating itself.

10. The ice storage heat exchange device according to claim 1, characterized in that, The magnetic field strength and rotation frequency of the rotating magnetic field are adjustable.

11. An air conditioner, characterized in that, The ice storage heat exchange device includes any one of claims 1 to 10.

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