Phase change energy storage device and heating ventilation air conditioning device
By installing spiral fins inside the pipe and encapsulating microcapsule phase change materials, the problems of low heat exchange efficiency and high leakage risk in the prior art are solved, achieving rapid temperature control and efficient phase change energy storage.
Patent Information
- Application Number
- CN202423310295.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing phase change energy storage devices suffer from problems such as low heat exchange efficiency, high leakage risk, and high maintenance costs, making it difficult to effectively control room temperature when an external cold source is lost.
Spiral fins are installed inside the pipeline, and phase change energy storage material is encapsulated in the form of microcapsules inside the fins. Combined with a medium-driven pump, heat exchange of the medium is achieved, which enhances the heat exchange effect and improves stability.
This improves the heat transfer performance and cycle stability of phase change energy storage materials, reduces energy loss, enables rapid temperature control, and enhances energy storage efficiency.
Smart Images
Figure CN223896660U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of heating ventilation air conditioner, especially a phase change energy storage device and heating ventilation air conditioner device. BACKGROUND
[0002] The cold storage technology can store the excess cold to the cold storage device when the system provides the excess cold, and release the cold when the cold is insufficient, which changes the load characteristics of the system in the time scale. The cold storage technology can realize the peak load shifting of the power grid, and relieve the unevenness of the power supply and demand. As a kind of passive technology, the cold storage technology can be used as an emergency cold source when the air conditioning device loses power and cannot provide a cold source, control the room temperature, and prevent the room temperature from being too high to affect personnel and equipment.
[0003] The conventional cold storage is realized by water cold storage pool and ice cold storage pool, which occupies a large area and has high maintenance cost. The phase change energy storage material realizes energy storage by using phase change latent heat, has smaller use area, is more flexible in arrangement, and has more diversified arrangement forms.
[0004] The "energy storage type regional cooling pipeline" fills the phase change cold storage material in the intermediate layer between the water supply pipeline of the water chiller unit and the water supply pipeline insulation layer to realize the purpose of cold storage. The cold storage device of the scheme is combined with the water chiller unit, and when the water chiller unit loses power and the chilled water pump fails, the cold storage device also fails. The phase change cold storage material is filled in the intermediate layer between the pipeline and the insulation layer, the heat exchange area is small, and the heat exchange efficiency is low.
[0005] The "temperature control system of passive safety device room" sets a cold storage tank outside the room, and connects the room through the air side pipeline to serve as a passive heat sink outside the room for temperature control. The scheme sets the cold storage tank, which occupies a large area.
[0006] The "energy storage type air conditioning floor" is provided with a pipe hole in the floor body, the pipe hole is opened at both ends of the floor body, and the heat exchange medium enters and exits the floor body. The energy storage characteristics of the floor body are utilized, or the energy storage material is laid on the surface of the floor body, or the energy storage material is arranged on the inner wall of the pipe hole to realize energy storage adjustment. The scheme sets the pipe hole in the floor body, which is difficult to install and maintain.
[0007] The "vertical buried pipe tunnel ventilation and phase change energy storage coupling system" proposes a vertical buried pipe tunnel ventilation and phase change energy storage coupling system, which includes a vertical buried pipe vertically buried in the soil, and the two ends are connected with the air inlet pipeline and the air outlet pipeline. The phase change material is arranged outside the air uplink, and the phase change material encapsulated by the cylindrical pipe is hung on the axial center line. The scheme utilizes the energy storage characteristics of the soil, needs underground space, the system has no external cold source, and the applicability is narrow. Since the phase change material is outside the pipeline, an additional insulation layer is needed, which increases the volume of the pipeline. UTILITY MODEL CONTENT
[0008] The utility model provides a technical problem that the utility model wants to solve lies in providing a phase change energy storage device and warm air conditioning device.
[0009] The utility model discloses a technical scheme that solves its technical problem is: construct a kind of phase change energy storage device, it includes pipeline, fin and phase change energy storage material;
[0010] The fin is fixedly installed in the pipeline, and the fin is a spiral structure.
[0011] The phase change energy storage material is encapsulated in the fin in the form of microcapsule.
[0012] The fin is installed in the pipeline in the form of welding.
[0013] In some embodiments, the phase change energy storage material is a solid-liquid phase change material.
[0014] In some embodiments, the cross-sectional shape of the pipeline is circular.
[0015] In some embodiments, the cross-sectional shape of the pipeline is square.
[0016] In some embodiments, the cross-sectional shape of the pipeline is polygonal.
[0017] In some embodiments, the fin is made of copper material.
[0018] In some embodiments, the pipeline is made of stainless steel material.
[0019] In this embodiment, a warm air conditioning device is also constructed, which includes the phase change energy storage device.
[0020] In some embodiments, the warm air conditioning device further includes a medium driving pump for driving the medium into the pipeline of the phase change energy storage device.
[0021] The utility model has the following beneficial effects: the phase change energy storage device fixes the fin in the pipeline, sets the fin as spiral structure, and encapsulates the phase change energy storage material in the fin, which enhances the heat exchange effect of the phase change energy storage material and the medium, faster discharges the cold / heat stored by the phase change energy storage material, and realizes better temperature control effect. The phase change energy storage material is encapsulated in the form of microcapsule, which improves the recycling stability of the phase change energy storage material and further increases the heat exchange performance. The structure of the phase change energy storage device proposed by the utility model has small heat exchange area with the outside world, reduces energy loss, and improves the energy storage efficiency of the energy storage material. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in conjunction with the drawings and embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as limiting the scope, for the ordinary skilled person in the art, under the premise of not paying creative labor, can also obtain other related drawings according to these drawings. In the drawings,
[0023] Figure 1 It is the internal structure schematic diagram of the phase change energy storage device in some embodiments of the utility model,
[0024] Figure 2 It is the three-dimensional structure schematic diagram of the phase change energy storage device in some embodiments of the utility model. DETAILED DESCRIPTION
[0025] In order to have more clear understanding of the technical features, object and effect of the utility model, the specific implementation mode of the utility model will be described in detail by referring to the drawings. In the following description, it should be understood that the orientation or positional relationship indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like is the orientation or positional relationship shown in the drawings, constructed and operated in a particular orientation, and is only for the convenience of describing the technical scheme, and should not be understood as indicating that the indicated device or element must have a particular orientation, therefore should not be understood as limiting the utility model.
[0026] It should also be noted that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on another element, or one or more intermediate elements can exist. The terms "first", "second", "third" and the like are only for the convenience of describing the technical scheme, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can explicitly or implicitly include one or more features. For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0027] Reference Figure 1 And Figure 2This is a phase change energy storage device in some embodiments of the present invention, comprising a pipe 1, fins 2, and a phase change energy storage material. The fins 2 are fixedly installed inside the pipe 1, and the fins 2 have a spiral structure. The phase change energy storage material is encapsulated within the fins 2 in the form of microcapsules. In this embodiment, a heating, ventilation, and air conditioning (HVAC) device is also constructed, which includes the aforementioned phase change energy storage device.
[0028] Specifically, currently, the combination of phase change energy storage materials (PCS) and pipelines 1 is mostly achieved by placing PCS on the outer surface of pipeline 1 to achieve energy storage. PCS suffers from low thermal conductivity, resulting in slow heat release when an external cold source is lost, failing to achieve the goal of controlling the room temperature to a reasonable level, and exhibiting slow energy storage and release rates. Furthermore, PCS exhibits fluidity in the liquid phase, making it prone to leakage, which affects the stability of the energy storage effect and increases maintenance costs. Therefore, in this embodiment, fins 2 are installed inside pipeline 1. Fins 2 are specifically spiral-shaped hollow shells, with PCS encapsulated within them in the form of microcapsules. Fins 2 are welded into pipeline 1. The spiral structure of fins 2 enhances the thermal conductivity of the PCS, strengthens heat exchange performance, and improves energy storage and release rates. To prevent leakage of the PCS in the liquid phase, the fluidity of the liquid PCS needs to be restricted. By encapsulating phase change energy storage materials within the fin 2 using microencapsulation technology, the storage and release efficiency of latent heat of phase change is improved, the stability of the energy conversion process is enhanced, and good energy storage effect and cycle stability are achieved.
[0029] In HVAC systems, pipe 1 contains a medium that has undergone cooling / heating treatment. As the medium flows through pipe 1, it exchanges heat with a phase change energy storage material, which stores the cold / heat energy in the medium. When the cold / heat source fails, the phase change energy storage material, through fins 2, exchanges heat with the medium again as it flows through pipe 1, releasing the stored cold / heat energy to cool / heat the medium and control the room temperature within a reasonable range. This medium can be air or a fluid.
[0030] In addition, the cross-sectional shape of pipe 1 is circular, square, or polygonal, and pipe 1 is made of stainless steel to ensure its strength and rigidity. The phase change energy storage material is a solid-liquid phase change material, which has a high enthalpy and a small volume change after phase transition. The specific material of the phase change energy storage material is not fixed, such as hydrated salt, molten salt, metal, and alloy, etc. Different phase change energy storage materials with different properties can be filled according to the actual needs of the project to meet the requirements of different projects. The fin 2 is made of copper to ensure the heat transfer efficiency of the fin 2.
[0031] Furthermore, the HVAC unit also includes a media-driven pump, which drives the media into the pipe 1 of the phase change energy storage device. This media-driven pump can be a fluid-driven pump or a fan-driven pump.
[0032] In summary, this phase change energy storage device enhances the heat exchange between the phase change energy storage material and the medium by fixing the fins 2 inside the pipe 1 and designing the fins 2 as a spiral structure, and encapsulating the phase change energy storage material within the fins 2. This allows for faster extraction of the stored cold / heat energy and achieves better temperature control. Furthermore, encapsulating the phase change energy storage material in microcapsule form improves its cyclic stability and further enhances its heat exchange performance. The structural form of the phase change energy storage device proposed in this invention results in a small heat exchange area with the external environment, reducing energy loss and improving the energy storage efficiency of the energy storage material.
[0033] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.
Claims
1. A phase change energy storage device, characterized in that, It includes pipes (1), fins (2), and phase change energy storage materials; The rib (2) is fixedly installed inside the pipe (1), and the rib (2) has a spiral structure; The phase change energy storage material is encapsulated in the form of microcapsules within the rib (2).
2. The phase change energy storage device according to claim 1, characterized in that, The rib (2) is installed inside the pipe (1) by welding.
3. The phase change energy storage device according to claim 1, characterized in that, The phase change energy storage material is a solid-liquid phase change material.
4. The phase change energy storage device according to claim 1, characterized in that, The cross-sectional shape of the pipe (1) is circular.
5. The phase change energy storage device according to claim 1, characterized in that, The cross-sectional shape of the pipe (1) is square.
6. The phase change energy storage device according to claim 1, characterized in that, The cross-sectional shape of the pipe (1) is polygonal.
7. The phase change energy storage device according to claim 1, characterized in that, The rib (2) is made of copper.
8. The phase change energy storage device according to claim 1, characterized in that, The pipe (1) is made of stainless steel.
9. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, Includes the phase change energy storage device as described in any one of claims 1 to 8.
10. The HVAC system according to claim 9, characterized in that, The HVAC system also includes a medium-driven pump, which is used to drive the medium into the pipeline (1) of the phase change energy storage device.