A phase change heat storage protection system

Abstract

The application belongs to the technical field of heat supply system, and particularly relates to a phase change heat storage protection system, which comprises a phase change heat storage protection device, the phase change heat storage protection device is provided with an air outlet and an air inlet, the air outlet and the air inlet of the phase change heat storage protection device are respectively connected to a circulating air heater through a circulating pump, the circulating air heater is further connected to an electric cabinet, the electric cabinet is connected to a controller through an inverter, the controller is respectively connected to a storage battery and a rectifier, and the rectifier is connected to a small photovoltaic power generation system; the phase change heat storage protection device comprises a box body, the box body is provided with an air inlet pipe, an air outlet pipe, a framework and a heat transfer device arranged in the framework, and the inside of the framework is filled with a phase change material so that the phase change material is wrapped outside the heat transfer device. The application can protect the performance of special electronic elements from being damaged by low temperature when encountering power failure and environmental temperature drop.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat supply system, and particularly relates to a phase change heat storage protection system. BACKGROUND

[0002] At present, adding a moderate thickness of the heat preservation layer is a main method for maintaining the space temperature, which can maintain the equipment temperature for a certain period of time, but in the case of extreme cold weather, there is not enough heat to guarantee that the equipment is not damaged at a certain temperature range for a long time. In order to prolong the constant temperature time, the thickness of the heat preservation layer can be increased, but increasing the thickness of the heat preservation layer will cause difficulty in normal heat dissipation of the equipment, and may cause the equipment to run in danger due to local high temperature.

[0003] At present, most of the automatic control and constant temperature devices of the equipment need power to provide support and protection, and cannot automatically respond at the moment of power failure, which may cause damage to the equipment due to low temperature.

[0004] As a means of short-term or long-term energy storage and reuse, heat storage technology can effectively alleviate the mismatch of time, space and intensity between energy supply and demand, and is one of the important ways to improve energy utilization efficiency and alleviate environmental pollution. Phase change heat storage has the advantages of constant temperature and large heat storage density, and is widely used in solar heat utilization, waste heat and residual heat recovery and utilization.

[0005] The working principle of the phase change heat storage protection device is that when the environmental temperature is higher than the phase change temperature of the material, the phase change material absorbs heat and melts to store energy, and when the temperature drops, the phase change material solidifies and releases heat to release energy. The phase change heat storage protection system can automatically absorb and release heat when the temperature changes, and has important significance for limited time protection of equipment power failure fault in extreme weather and prevention of performance damage due to low temperature. SUMMARY

[0006] The application provides a phase change heat storage protection system, which aims to protect the performance of special electronic elements from being damaged by low temperature when encountering power failure and environmental temperature drop.

[0007] To achieve the above purpose, the technical scheme adopted by the application is as follows:

[0008] A phase change heat storage protection system, comprising a phase change heat storage protection device, the phase change heat storage protection device is provided with an air outlet and an air inlet, the air outlet and the air inlet of the phase change heat storage protection device are connected to a circulating air heater through a circulating pump respectively, the circulating air heater is further connected to an electric cabinet, the electric cabinet is connected to a controller through an inverter, the controller is connected to a storage battery and a rectifier respectively, and the rectifier is connected to a small photovoltaic power generation system.

[0009] The phase change heat storage protection device comprises a box body, an air inlet pipe, an air outlet pipe, a framework and a heat transfer device arranged in the framework are arranged in the box body, one end of the air inlet pipe is connected to a circulating air heater, the other end of the air inlet pipe is connected to the heat transfer device after penetrating through the framework, one end of the air outlet pipe is connected to a circulating heater, the other end of the air outlet pipe is connected to the heat transfer device after penetrating through the framework, and the framework is filled with phase change materials so that the phase change materials are wrapped outside the heat transfer device.

[0010] The heat transfer device comprises a heat supply heat exchanger and a heat extraction heat exchanger, and the heat supply heat exchanger and the heat extraction heat exchanger are connected in communication through a plurality of heat fluid pipes.

[0011] Further, the upper end of the framework is provided with a phase change material filling inlet, the bottom end of the framework is provided with a phase change material outlet, and the side wall of the framework is provided with a heat dissipation fin.

[0012] Further, the heat extraction heat exchanger is provided with a pressure protection device.

[0013] Further, the pressure protection device is arranged on the heat extraction heat exchanger after penetrating through the framework from outside the framework.

[0014] Further, the air outlet pipe is provided with a fan at the junction with the box body.

[0015] Further, the box body is provided with a box door.

[0016] Further, the outer wall of the box body is a hollow box wall, the air inlet pipe is arranged in the box wall, and the two ends of the air inlet pipe penetrate through the box wall and are connected to the circulating heater and the heat transfer device respectively.

[0017] Further, the phase change material is a low-temperature phase change material, and comprises one of ether-diol compounds, CaCl2·6H2O, Na2HPO4·12H2O, Na2S2O3·5H2O, 61.5% Mg(NO3)2·6H2O+38.5% NH4NO3, paraffin and biphenyl.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] By using the phase change material, the heat storage and heat release process of the phase change material is controlled by the strategy of first using the waste heat of the equipment, then using the heat of solar energy, and finally using the electric energy of the battery, the environment temperature around the equipment is maintained high enough for a certain period of time, and the performance of special electronic components is not affected by low temperature. Meanwhile, the present application is better adapted to unattended environment and has higher reliability, is a protection device using clean energy, can reduce energy consumption and carbon emission. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 This is a schematic diagram of the phase change thermal energy storage protection system;

[0021] Figure 2 This is a schematic diagram of the phase change heat storage protection device.

[0022] Wherein: 1-Phase change material; 2-Box door; 3-Frame; 4-Hot fluid pipe; 5-Phase change material outlet; 6-Heat exchanger; 7-Air inlet pipe; 8-Heat pipe outer ring fins; 9-Pressure protection device; 10-Heat exchanger; 11-Heat dissipation fins; 12-Phase change material filling inlet; 13-Air outlet pipe; 14-Fan; 15-Circulating pump; 16-Circulating air heater; 17-Electrical cabinet; 18-Inverter; 19-Controller; 20-Battery; 21-Rectifier; 22-Small photovoltaic power generation system. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a phase change thermal energy storage protection system includes a phase change thermal energy storage protection device. The phase change thermal energy storage protection device is provided with an air outlet and an air inlet. The air outlet and air inlet of the phase change thermal energy storage protection device are respectively connected to a circulating air heater 16 through a circulating pump 15. The circulating air heater 16 is also connected to an electrical cabinet 17. The electrical cabinet 17 is connected to a controller 19 through an inverter 18. The controller 19 is connected to a battery 20 and a rectifier 21. The rectifier 21 is connected to a small photovoltaic power generation system 22.

[0025] like Figure 2 As shown, the phase change thermal storage protection device includes a housing, inside which are an air inlet pipe 7, an air outlet pipe 13, a frame 3, and a heat transfer device disposed within the frame 3. One end of the air inlet pipe 7 is connected to a circulating air heater, and the other end of the air inlet pipe 7 passes through the frame 3 and connects to the heat transfer device. One end of the air outlet pipe 13 is connected to the circulating heater, and the other end of the air outlet pipe 13 passes through the frame 3 and connects to the heat transfer device. The frame 3 is filled with a phase change material 1, which wraps around the outside of the heat transfer device.

[0026] The heat transfer device includes a heat supply heat exchanger 6 and a heat extraction heat exchanger 10. The heat supply heat exchanger 6 and the heat extraction heat exchanger 10 are connected by several hot fluid pipes 4. Each hot fluid pipe 4 has a heat pipe outer ring fin 8 on its outer wall.

[0027] The upper end of the skeleton 3 is provided with a phase change material filling inlet 12, the bottom end of the skeleton is provided with a phase change material outlet 5, and the side wall of the skeleton is provided with a heat dissipation fin 11.

[0028] As a further choice of the embodiment, the heat extraction heat exchanger 10 is provided with a pressure protection device 9.

[0029] As a further choice of the embodiment, the pressure protection device 9 is arranged on the heat extraction heat exchanger 10 after penetrating the skeleton 3 from the outside of the skeleton 3.

[0030] As a further choice of the embodiment, the air outlet pipe 13 is provided with a fan 14 at the junction with the box body.

[0031] As a further choice of the embodiment, the box body is provided with a box door 2.

[0032] As a further choice of the embodiment, the outer wall of the box body is a hollow box wall, the air inlet pipe 7 is arranged in the box wall, and the two ends of the air inlet pipe 7 penetrate the box wall and are connected to the circulating heater and the heat transfer device respectively.

[0033] As a further choice of the embodiment, the phase change material is a low-temperature phase change material, including one of ether-diol compounds, CaCl2·6H2O, Na2HPO4·12H2O, Na2S2O3·5H2O,

[0034] 61.5% Mg(NO3)2·6H2O+38.5% NH4NO3, paraffin, biphenyl.

[0035] System working principle:

[0036] In use, the equipment with the heat preservation cavity is placed in the box body of the heat accumulation protection device, the air heated by the circulating air heater flows out from the air outlet pipe 13 through the air inlet pipe 7 and the heat fluid pipe 4, the heat transfer and the heat pipe outer ring fin 8 are used to strengthen the heat transfer, and the phase change material 1 is melted to complete the heat accumulation process. Or the phase change material 1 is melted by the waste heat generated by the equipment to complete the heat accumulation process.

[0037] In the case of power failure in extreme weather conditions, the ambient temperature around the equipment drops sharply, and the internal environment drops below the phase change temperature of the material, the initial phase change material solidifies and releases heat, which is transferred to the heat preservation cavity to ensure that the performance of the equipment is not damaged within a certain time. When the energy output, the heat energy generated by the waste heat of the equipment in the phase change heat accumulation system is preferentially output, if the energy supply is insufficient, a small photovoltaic power generation system can be added externally to assist in providing heat, and the excess energy can also be stored in the energy storage system, and finally the electric energy provided by the storage battery is output.

[0038] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments described. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to best explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application and get the best results from the application. The application is only limited by the claims and their full scope and equivalents.

Claims

1. A phase change thermal energy storage protection system, characterized in that: The device includes a phase change thermal energy storage protection device, which has an air outlet and an air inlet. The air outlet and air inlet of the phase change thermal energy storage protection device are respectively connected to a circulating air heater (16) via a circulating pump (15). The circulating air heater (16) is also connected to an electrical cabinet (17). The electrical cabinet (17) is connected to a controller (19) via an inverter (18). The controller (19) is connected to a battery (20) and a rectifier (21) respectively. The rectifier (21) is connected to a small photovoltaic power generation system (22). The phase change heat storage protection device includes a housing, which contains an air inlet pipe (7), an air outlet pipe (13), a frame (3), and a heat transfer device disposed within the frame (3). One end of the air inlet pipe (7) is connected to a circulating air heater, and the other end of the air inlet pipe (7) passes through the frame (3) and is connected to the heat transfer device. One end of the air outlet pipe (13) is connected to a circulating heater, and the other end of the air outlet pipe (13) passes through the frame (3) and is connected to the heat transfer device. The frame (3) is filled with a phase change material (1) so that the phase change material (1) wraps around the outside of the heat transfer device. The heat transfer device includes a heat supply heat exchanger (6) and a heat extraction heat exchanger (10). The heat supply heat exchanger (6) and the heat extraction heat exchanger (10) are connected by a number of hot fluid pipes (4). Each hot fluid pipe (4) has a heat pipe outer ring fin (8) on its outer wall. The upper end of the skeleton (3) is provided with a phase change material filling inlet (12), the bottom end of the skeleton is provided with a phase change material outlet (5), and the side wall of the skeleton is provided with heat dissipation fins (11). The outer wall of the box is a hollow box wall, and the air inlet pipe (7) is set inside the box wall. The two ends of the air inlet pipe (7) pass through the box wall and are respectively connected to the circulating heater and the heat transfer device.

2. The phase change thermal energy storage protection system according to claim 1, characterized in that: The heat exchanger (10) is equipped with a pressure protection device (9).

3. The phase change thermal energy storage protection system according to claim 2, characterized in that: The pressure protection device (9) passes through the frame (3) from the outside and is installed on the heat exchanger (10).

4. The phase change thermal energy storage protection system according to claim 3, characterized in that: A fan (14) is provided at the junction of the air outlet pipe (13) and the housing.

5. The phase change thermal energy storage protection system according to claim 4, characterized in that: The box body is equipped with a box door (2).

6. The phase change thermal energy storage protection system according to claim 5, characterized in that: The phase change material is a low-temperature phase change material, including ether-diol compounds, CaCl2·6H2O, Na2HPO4·12H2O, Na2S2O3·5H2O, and 61.5%. One of Mg(NO3)2·6H2O+38.5% NH4NO3, paraffin, and biphenyl.

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