A heat storage module with self-insulating function

Abstract

This invention provides a self-insulating heat storage module, installed in the outdoor unit of an air conditioning system. The module includes an inner liner and a partition plate within the liner, which divides the liner into a phase change heat exchange layer and a refrigerant heat exchange layer. The phase change heat exchange layer includes a heat exchange structure and a phase change material filling the structure. This self-insulating heat storage module uses phase change insulation material, achieving high-performance insulation at a lower cost. The insulation device has a simple structure; by employing a multi-layer separated foam insulation structure, the cost is reduced by more than 50% compared to adding an electric heating element to the module. The manufacturing difficulty of the heat storage module is greatly reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of heat storage and insulation devices, and particularly relates to a heat storage module with self-insulating function. Background Technology

[0002] In winter, when outdoor temperatures are low, especially when the surface temperature of the outdoor heat exchanger is below 0°C, heat pump air conditioners easily combine with humid air to form a frost layer. Traditional defrosting methods require the air conditioner to enter defrost mode, causing the four-way valve to switch, turning the indoor unit from a condenser to an evaporator. To prevent a drop in indoor temperature, the indoor unit's fan needs to be turned off to prevent cold air from entering the room. However, this also means the air conditioning system cannot continue heating during defrosting. Therefore, it is necessary to add a heat storage device on the outdoor side of the air conditioner to provide heat while the system is defrosting, ensuring continuous heating.

[0003] However, the phase change material inside the thermal storage module needs to operate within a certain range of ambient temperatures to achieve optimal heat exchange efficiency. Therefore, insulation measures are required inside the thermal storage module to ensure the operating temperature of the internal energy storage phase change material, thereby achieving optimal heat exchange efficiency and performance. In existing technologies, the insulation device adds a heating component between the liquid inlet and outlet to achieve the insulation effect of the thermal storage module, but this results in a complex process and high cost. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention provides a heat storage module with self-insulating function, which is a heat storage device that achieves high-performance insulation effect at a lower cost.

[0005] A heat storage module with self-insulating function is installed in the outdoor unit of an air conditioning system. The heat storage module includes an inner tank and a partition plate disposed in the inner tank. The partition plate divides the inner tank into a phase change heat exchange layer and a refrigerant heat exchange layer. The phase change heat exchange layer includes a heat exchange structure and a phase change material filled outside the heat exchange structure.

[0006] Furthermore, the phase transition temperature of the phase change material is 38–44 degrees Celsius.

[0007] Furthermore, a refrigerant pipeline is provided inside the refrigerant heat exchange layer, and the refrigerant heat exchange layer is filled with insulation material.

[0008] Furthermore, it also includes an outer shell disposed outside the inner liner.

[0009] Furthermore, the outer shell and the inner liner are spaced apart, and an insulation layer is formed between the outer shell and the inner liner, the insulation layer being filled with insulation material.

[0010] Furthermore, the outer shell and the inner liner are spaced apart, and a heat insulation layer is formed between the outer shell and the inner liner, and the heat insulation layer is a vacuum heat insulation layer.

[0011] Furthermore, the outer shell and the inner liner are spaced at the same distance on all sides.

[0012] Furthermore, the thickness of the insulation layer is 10-15 mm.

[0013] Furthermore, the insulation material is pearl cotton or phenolic foam insulation material.

[0014] Furthermore, the outer shell is an insulating layer that wraps around the inner liner, and the outer shell is fitted tightly against the inner liner.

[0015] The heat storage module with self-insulating function of the present invention uses phase change insulation material for insulation, which can achieve high-performance insulation effect at a lower cost. Moreover, the insulation device has a simple structure. By adopting a multi-layer separated foam insulation structure, the cost is reduced by more than 50% compared with adding electric heating components in the module. The processing difficulty of the heat storage module is greatly reduced and the heat exchange efficiency is improved. Attached Figure Description

[0016] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of the heat storage module with self-insulating function of the present invention;

[0018] Figure 2 This is a side sectional view of the heat storage module with self-insulating function of the present invention;

[0019] Figure 3 This is a front sectional view of the heat storage module with self-insulating function of the present invention.

[0020] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] The heat storage module with self-insulating function of the present invention can be used in air conditioning systems, such as multi-split air conditioning systems. The heat storage module is installed in the outdoor unit. When the air conditioning unit is heating in winter, the outdoor unit heats up and defrosts, and provides heat through the heat storage module, while the indoor unit works normally, achieving continuous heating without affecting the user's comfort.

[0023] like Figures 1 to 3The diagram shows a self-insulating heat storage module. The module includes an outer shell 60, an inner liner 10 within the outer shell 60, and a partition plate 40 within the inner liner 10. The heat storage module is divided into different layers by the outer shell 60, the inner liner 10, and the partition plate 40. The partition plate 40 separates the inner liner 10 into a phase change heat exchange layer 20 and a refrigerant heat exchange layer 30. The phase change heat exchange layer 20 contains a heat exchange structure, which is filled with a phase change material 21. The phase change material 21 provides heat storage and energy supply for the heat exchange structure, while also serving as insulation. The refrigerant heat exchange layer 30 contains refrigerant piping for refrigerant flow heat exchange. Heat exchange in the refrigerant piping does not require the use of the phase change material 21. The refrigerant heat exchange layer 30 can be filled with insulation material, which can further improve the insulation effect of the phase change heat exchange layer 20 on the one hand, and also serve as a positioning structure to prevent the phase change material 21 from undergoing drastic volume changes during phase change, which could lead to deformation of the partition plate 40 and infiltration of the phase change material 21. The insulation material can be pearl cotton or phenolic foam insulation material.

[0024] The aforementioned heat storage module uses a low-temperature nanocomposite material as the heat storage phase change material 21. The phase change temperature of this material 21 is between 38 and 44 degrees Celsius. Therefore, the phase change material 21 needs to be isolated from the outdoor unit of the air conditioner and properly insulated to ensure that when the unit needs defrosting, the heat storage module can quickly reach the phase change temperature and maintain it within the optimal phase change temperature range to ensure that the heat stored in the phase change material 21 can be fully utilized. The heat source of the phase change material 21 consists partly of the latent heat of the material itself and partly of the heat stored by absorbing heat from the air conditioning system, causing the material to undergo a phase change.

[0025] The partition plate 40 separating the phase change heat exchange layer 20 and the refrigerant heat exchange layer 30 can be made of sheet metal to maximize the utilization of the phase change material 21. The position of the partition plate 40 is flexible, and the amount of phase change material 21 in the phase change heat exchange layer 20 can be adjusted according to the different environments in which the heat storage module is used.

[0026] A heat insulation layer 50 is provided between the outer shell 60 and the inner liner 10. Unlike the prior art that adds additional heating components, this invention uses physical filling of insulation material as the heat storage device's insulation measure. Pearl cotton or phenolic foam insulation material can be used for filling. Preferably, phenolic foam insulation material is used as both the insulation layer 50 and the filling material in this invention. Phenolic resin foam has advantages such as low thermal conductivity, good mechanical properties, excellent dimensional stability, low water absorption, good heat resistance, excellent electrical insulation, and flame retardancy. This also meets the requirements that the heat insulation material is not easily deformed, does not conduct heat well, and has good heat resistance, and is beneficial for ensuring that the phase change temperature of the low-temperature nanocomposite phase change material 21 used remains constant for a long time. Furthermore, combined with the low-temperature nanocomposite phase change material 21 selected in this invention, a good heat insulation effect is achieved while significantly reducing costs and production difficulty. At the same time, the insulation material can separate heat transfer between the inner liner 10 and the outer shell 60, preventing significant heat loss from the heat storage module.

[0027] Alternatively, a vacuum can be created within the insulation layer 50 located between the outer shell 60 and the inner liner 10 to form a vacuum insulation layer 50. During operation, for example, before sealing the heat storage module, a vacuum pump can be used to extract air from the insulation cavity to replace the use of foam insulation material. This solution is more expensive but offers better insulation performance. Furthermore, a layer of sponge insulation 50 can be wrapped around the outer layer of the inner liner 10, eliminating the need for the outer shell 60. This solution is simpler in structure and lower in cost, but its insulation performance is not as good as the insulation layer 50 structure filled with pearl cotton or phenolic foam insulation material.

[0028] like Figure 2 , Figure 3 The diagram shows a front sectional view and a side sectional view of a heat storage module with self-insulating function. The heat storage module with self-insulating function of the present invention consists of an external filling device, an insulation layer 50, a refrigerant heat exchange layer 30, and a partition sheet metal part. The insulation layer 50 wraps around the entire inner liner 10 of the heat storage module. The thickness of the insulation layer 50 is between 10 and 15 mm. The thickness of the insulation layer 50 on each side is basically the same, and it evenly wraps around each side of the inner liner 10 to ensure that the phase change heat change rate of each part of the phase change material 21 is basically the same.

[0029] The heat storage module with self-insulating function of the present invention adopts nano-composite phase change material 21 and phenolic foam material. The phase change material 21 and the heat insulation material are separated by a double sealed cavity. The heat insulation effect is achieved by filling with foam material or sponge, so that the air conditioning device can continue to heat during defrosting.

[0030] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat storage module with self-insulating function, characterized in that, The heat storage module is installed in the outdoor unit of the air conditioning system. The heat storage module includes an inner tank and a partition plate installed in the inner tank. The partition plate divides the inner tank into a phase change heat exchange layer and a refrigerant heat exchange layer. The phase change heat exchange layer includes a heat exchange structure and a phase change material filled outside the heat exchange structure. The refrigerant heat exchange layer is equipped with refrigerant pipelines and is filled with insulation material. The placement of the partition plate is flexible, and the amount of phase change material filling in the phase change heat transfer layer can be adjusted according to the different environments in which the heat storage module is used.

2. The heat storage module with self-insulating function according to claim 1, characterized in that, The phase transition temperature of the phase change material is 38-44 degrees Celsius.

3. The heat storage module with self-insulating function according to claim 1, characterized in that, It also includes an outer shell disposed outside the inner liner.

4. The heat storage module with self-insulating function according to claim 3, characterized in that, The outer shell and the inner liner are spaced apart, and a heat insulation layer is formed between the outer shell and the inner liner. The heat insulation layer is filled with heat insulation material.

5. The heat storage module with self-insulating function according to claim 3, characterized in that, The outer shell and the inner liner are spaced apart, and a heat insulation layer is formed between the outer shell and the inner liner. The heat insulation layer is a vacuum heat insulation layer.

6. The heat storage module with self-insulating function according to claim 4 or 5, characterized in that, The outer shell and the inner liner are spaced at the same distance on all sides.

7. The heat storage module with self-insulating function according to claim 4 or 5, characterized in that, The thickness of the insulation layer is 10~15mm.

8. The heat storage module with self-insulating function according to claim 1 or 4, characterized in that, The insulation material is pearl cotton or phenolic foam insulation material.

9. The heat storage module with self-insulating function according to claim 3, characterized in that, The outer shell is an insulating layer that wraps around the inner liner, and the outer shell is fitted tightly against the inner liner.

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