Heat storage type warmer based on long-term heat storage and controlled-release heat phase change material

Abstract

The utility model discloses a heat storage type warmer based on a long-term heat storage and controlled-release heat phase change material, and belongs to the field of clean utilization of renewable energy sources. Comprising a box body, a heating mechanism, a stirring mechanism and a triggering mechanism, a phase change material capable of controlling heat release is stored in the box body and serves as a heat storage medium. The heating mechanism is used for converting electric energy into heat energy and heating the phase-change material, and the heat energy is stored in the phase-change material through heating and melting of the phase-change material; the stirring mechanism is used for stirring the phase change material, promoting the phase change behavior and homogenizing the components of the molten phase change material; and the triggering mechanism is used for controlling the heat release behavior of the phase change material. By controlling the heat release behavior of the controllable heat release phase change material, long-term stable storage and controllable utilization of heat energy are realized, and the heating cost is greatly saved. Meanwhile, the power supply load of the power grid can be balanced, and clean and efficient utilization of renewable energy sources is promoted.

Description

TECHNICAL FIELD

[0001] The application relates to a heater, and belongs to the field of clean utilization of renewable energy, and particularly relates to a heat storage type heater based on long-term heat storage and controllable heat release phase change materials. BACKGROUND

[0002] In recent years, with the continuous expansion of photovoltaic and wind power, renewable energy represented by solar energy and wind energy has continuously improved its position in the energy supply system. In order to adapt to the intermittent, random and fluctuating characteristics of renewable energy, adjust the difference between the supply side and the demand side of the power system, and reasonably and efficiently utilize the valley electricity storage technology of off-peak period of power grid, the valley electricity storage technology is a key technology for the construction of new power system. Valley electricity storage technology plays an important role in maintaining the balance between supply and demand of power grid system, ensuring the safety of power grid, and reducing the cost of electricity.

[0003] Compared with pumped storage and electrochemical energy storage, phase change heat storage technology has the advantages of low cost, long service life and high energy storage density, and can meet the application requirements of multi-energy complementary utilization of renewable energy and large-scale power peak regulation. In recent years, the advantages of valley electricity storage technology based on phase change materials in building heating have been increasingly highlighted, and products such as phase change boilers and phase change heat storage devices have emerged in an endless stream. However, the traditional phase change heat storage material has a short heat storage time, which leads to the lack of flexibility and convenience of traditional phase change heat storage technology, and it is difficult to meet the flexible and on-demand heating needs of the user side. CONTENT OF THE UTILITY MODEL

[0004] The application provides an electric heating heat storage type heater capable of automatic heat storage and controllable heat release. Based on the published controllable heat release phase change material (for example, CN202011354650), it is applied to long-term heat storage applications, and can automatically store heat during the low-price valley electricity period at night and controllably release the stored heat during the daytime electricity peak period for heating, thereby meeting the technical needs of flexible, convenient and on-demand heating of the user side.

[0005] The heat storage type heater based on long-term heat storage and controllable heat release phase change materials comprises a box body, a heating mechanism, a stirring mechanism and a triggering mechanism.

[0006] The heating mechanism is used for converting electric energy into heat energy, heating the phase change material, and storing heat energy in the phase change material through the melting of the phase change material due to temperature rise.

[0007] The stirring mechanism is used for stirring the phase change material, promoting phase change behavior, and homogenizing the composition of the melted phase change material.

[0008] The triggering mechanism is used for controlling the heat release behavior of the phase change material.

[0009] Optionally, the box comprises a shell and an upper cover, which are fixedly connected by at least one side and sealed; the side of the shell is provided with a heat dissipation fin; the heating mechanism, the stirring mechanism and the triggering mechanism are respectively fixed on the upper cover.

[0010] Preferably, the shell and the upper cover are bolted, and the sealing treatment is performed by a sealing gasket between the two.

[0011] Optionally, the side of the shell is further provided with a flange window for observing the physical state and liquid level of the phase change material.

[0012] Optionally, the heating mechanism comprises a plurality of electric heaters and a plurality of thermocouples; the electric heaters and the thermocouples are fixed on the box;

[0013] The electric heater is used to heat the phase change material, convert electric energy into heat energy, and store it in the phase change material;

[0014] The thermocouple is used to measure the temperature inside the box.

[0015] Optionally, the plurality of electric heaters are connected in parallel by a plurality of groups of electric heaters.

[0016] Optionally, the plurality of thermocouples comprise a first thermocouple, the tip of which is in contact with the electric heater, and the distance between the temperature measuring part and the upper cover is set to 10-15 cm, which is used to measure the temperature of the electric heater to achieve accurate control of the temperature of the electric heater and prevent the phase change material from decomposing due to too high temperature.

[0017] Optionally, the plurality of thermocouples further comprise a second thermocouple, which is arranged in parallel with the stirrer, and the temperature measuring tip is about 1 cm away from the stirrer, which is used to judge the physical state of the phase change material near the stirrer, so as to control the action of the stirrer.

[0018] Optionally, the plurality of thermocouples further comprise a third thermocouple, which is located at the bottom edge of the warmer and is fixedly connected with the shell, which is used to monitor the physical state of the phase change material in the box to control the energy storage mode of the warmer.

[0019] Preferably, the third thermocouple is threadedly connected with the shell.

[0020] Optionally, the stirring mechanism comprises a stirrer, a support and a motor, which are sequentially fixedly connected;

[0021] The stirrer adopts a propelling type stirring paddle form, which is hoisted on the motor through a coupling; the rotating rod is fixed to the bottom of the support;

[0022] The support is fixedly connected with the upper cover, and the motor is located on the upper surface of the support.

[0023] Optionally, the trigger mechanism comprises a sliding module and a trigger.

[0024] The sliding module is tightly connected to the upper cover in sequence through a flange and a sealing film; and the trigger is bonded to the movement position of the sliding module.

[0025] Optionally, the sealing film adopts a multi-layer structure and is formed by stacking a polytetrafluoroethylene layer and a rubber layer to ensure the sealing property of the heater box.

[0026] Optionally, the phase change material adopts a long-term seasonal energy storage shaped phase change material.

[0027] The application can produce beneficial effects, including:

[0028] The heat accumulating heater provided by the application uses a high-enthalpy phase change material with long-term heat storage and controllable heat release as a heat storage medium to convert the off-peak electricity of the power grid at night into heat energy, which is stored in the phase change material, so that long-term stable heat energy storage and controllable utilization are realized, the heating cost is greatly saved, the power supply load of the power grid is balanced, and clean and efficient utilization of renewable energy is promoted. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a heat accumulating heater based on a long-term heat storage and controllable heat release phase change material according to an embodiment of the application;

[0030] Figure 2 FIG. 2 is a front view and a three-dimensional diagram of a stirring mechanism according to an embodiment of the application;

[0031] Figure 3 FIG. 3 is a front view and a three-dimensional diagram of a trigger mechanism according to an embodiment of the application;

[0032] PARTS AND LIST OF REFERENCE NUMBERS

[0033] 1, housing, 2, upper cover, 3, electric heater, 4, first thermocouple, 5, second thermocouple, 6, third thermocouple, 7, stirrer, 8, support, 9, motor, 10, sealing shaft seal, 11, flange, 12, sliding module, 13, trigger, 14, flange, 15, sealing film. DETAILED DESCRIPTION

[0034] The application will be described in detail below with reference to the embodiments, but the application is not limited to these embodiments.

[0035] A heat accumulating heater based on a long-term heat storage and controllable heat release phase change material comprises a box, a heating mechanism, a stirring mechanism and a trigger mechanism.

[0036] The box stores controllable heat release phase change material as a heat storage medium;

[0037] The heating mechanism is used for converting electric energy into heat energy to heat the phase change material to make it melt, and the phase change material stores the absorbed heat as latent heat;

[0038] The stirring mechanism is used for stirring the phase change material to promote phase change behavior and make the melted phase change material homogenized;

[0039] The triggering mechanism is used for controlling the exothermic behavior of the phase change material.

[0040] Please refer to Figure 1 which shows the overall structure of the heat storage type heater based on long-term heat storage and controllable heat release phase change material in an embodiment.

[0041] The box includes a shell 1 and an upper cover 2, and at least one edge between the two is fixedly connected and sealed. The outer surface of the shell 1 is provided with heat dissipation fins; the heating mechanism, the stirring mechanism, and the triggering mechanism are fixed on the upper cover.

[0042] In an embodiment, the shell 1 is connected to the upper cover 2 by bolts, and the upper cover 2 and the shell 1 are sealed by a sealing gasket.

[0043] In an embodiment, the outer surface of the shell 1 is also provided with a flange window for observing the physical state and liquid level of the phase change material.

[0044] In an embodiment, the heating mechanism includes an electric heater 3 and a thermocouple; the electric heater 3 and the thermocouple are both fixed on the upper cover 2.

[0045] The electric heater is used for heating the phase change material to convert electric energy into heat energy and store it in the phase change material.

[0046] The thermocouple is used for measuring the temperature inside the box.

[0047] In an embodiment, the electric heater 3 is connected to the upper cover 2 by bolts, and multiple groups of heaters can be connected in parallel.

[0048] In an embodiment, the plurality of thermocouples includes a thermocouple 4. The thermocouple 4 is fixed to the upper cover 2 by threads, and the tip of the thermocouple 4 is in contact with the electric heater 3. The temperature measuring part of the thermocouple tip is 10-15 cm away from the upper cover 2, so as to accurately control the temperature of the electric heater and prevent the phase change material from decomposing due to too high temperature.

[0049] AsFigure 2 As shown in the embodiment, the stirring mechanism comprises a stirrer 7, a support 8 and a motor 9, which are sequentially fixedly connected.

[0050] The stirrer 7 is in the form of a propeller stirring paddle and is hoisted on the motor 9 through a shaft coupling; the rotating rod of the stirrer 7 is fixed to the bottom of the support 8;

[0051] The support is fixedly connected with the upper cover, the support is in the shape of a Chinese character 'jia', and the motor is located on the upper surface of the support.

[0052] In an embodiment, the rotating rod of the stirrer 7 is fixed to the upper cover 2 through a sealing shaft seal 10, the sealing shaft seal 10 is fixed to the upper cover 2 through a flange plate 11, the flange plate is bolted to the upper cover, and the bolts must have a certain pre-tightening force to ensure the sealing effect.

[0053] The motor 9 is connected with the support 8 through bolts, and the support 8 is connected with the upper cover 2 through bolts.

[0054] In an embodiment, the plurality of thermocouples further comprises a thermocouple 5. The thermocouple 5 is connected with the upper cover 2 through threads, the thermocouple 5 is parallel to the stirring rod, the temperature measuring tip of the thermocouple 5 is about 1 centimeter away from the stirrer, and the thermocouple 5 is used to judge the physical state of the phase change material near the stirrer, so as to control the action of the stirrer.

[0055] In an embodiment, the plurality of thermocouples further comprises a thermocouple 6. The thermocouple 6 is located at the bottom edge of the warmer and is connected with the shell through threads, and the thermocouple 6 is used to monitor the physical state of the phase change material in the box body and control the energy storage mode of the warmer.

[0056] As shown in the embodiment, the trigger mechanism comprises a sliding module 12 and a trigger 13. Figure 3 The sliding module 12 is tightly connected to the upper cover in sequence through a flange plate 14 and a sealing film 15; and the trigger 13 is bonded to the movement position of the sliding module.

[0057] In an embodiment, the sealing film 15 adopts a multi-layer structure and is stacked by a polytetrafluoroethylene layer and a rubber layer, so as to ensure the sealing property of the warmer box.

[0058] In an embodiment, the sealing film 15 is pressed against the upper cover 2 through the flange plate 14, the flange plate 14 is bolted to the upper cover, the sliding module 12 is located on the upper part of the sealing film 15 and is connected with the upper cover 2 through bolts, and the trigger 13 is bonded to the movement position of the sliding module 12.

[0059]

[0060] ​In an embodiment, the phase change material adopts a long-term seasonal energy storage shaped phase change material. For example, the long-term heat storage and controllable heat release phase change material disclosed in Chinese Patent Application CN202011354650, which uses sugar alcohol as the phase change material and high molecular polymer as the support carrier, synthesizes the composite phase change material by solvent method. This material has considerable prospects in long-term heat storage applications.

[0061] In a preferred embodiment, the distance between the controllable heat release phase change material and the upper cover 2 is 5-10 cm, calculated based on the filling amount of the phase change material in liquid state.

[0062] Example 1

[0063] In the initial state, the heat storage type warmer based on long-term heat storage and controllable heat release phase change material and its internal phase change material are at room temperature, the physical state of the phase change material is solid, and the sliding module 12 is at the top end, which is the original position of the sliding module.

[0064] Further, in order to obtain the long-term heat storage function, start the heat storage function of the heat storage type warmer, start the electric heater 3, heat the phase change material, and use the thermocouple 4 to control the temperature of the electric heater 3 to avoid decomposition of the phase change material inside the box due to excessive temperature.

[0065] Further, in order to obtain the long-term heat storage function, monitor the temperature of the thermocouple 5, and when the temperature approaches the melting point of the phase change material, start the motor 9 to drive the stirrer 7 to rotate, promoting the melting and homogenization of the phase change material.

[0066] Further, in order to obtain the long-term heat storage function, monitor the temperature of the thermocouple 6, and when its temperature is about 10-30℃ higher than the melting point of the phase change material, disconnect the electric heater and stop heating. At this time, the phase change material has completely melted into a liquid state. Wait for the phase change material inside the warmer to cool naturally to room temperature, at which time the physical state of the internal phase change material remains liquid, and the heat energy is stored in the liquid phase change material.

[0067] When the physical state of the phase change material inside the warmer is liquid and the temperature is room temperature, in order to obtain the controllable heat release heating function, start the sliding module to make the trigger penetrate the sealing septum and make the trigger contact the internal liquid phase change material. At this time, the phase change material starts to change from liquid to solid, and the temperatures of thermocouples 4, 5, and 6 rapidly increase.

[0068] Further, in order to obtain the controllable heat release function, monitor the temperature change of the thermocouple 4, and when its temperature is higher than 40℃, the phase change material in the radiator starts to change to solid state, and the sliding module is started to move to the designed original point. After that, the heat in the phase change material is gradually released to heat the indoor air through the heat dissipation fins on the surface of the box.

[0069] The above merely describes several embodiments of the present application, and does not limit the present application in any form. Although the present application is disclosed with the preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the disclosed technical contents without departing from the scope of the present application, and the equivalent embodiments are equivalent to the equivalent embodiments, which are within the scope of the technical solutions.

Claims

1. A heat storage type heater based on long-term heat storage and controllable heat release phase change material, characterized in that, The utility model relates to a kind of portable heating device, including: box, heating mechanism, stirring mechanism, trigger mechanism;The box stores controllable heat release phase change material as heat storage medium in it; The heating mechanism is used to convert electric energy into heat energy, heat the phase change material, and store heat energy in the phase change material by the warming melting of phase change material; The stirring mechanism is used to stir the phase change material, promote phase change behavior, and make the composition of melted phase change material homogenized; The trigger mechanism is used to control the exothermic behavior of the phase change material. The box includes a shell and an upper cover, and at least one side is fixedly connected between the two and sealed;The side of the shell is provided with a heat dissipation fin;The heating mechanism, stirring mechanism and trigger mechanism are fixed on the upper cover respectively.

2. The heat accumulator heater based on long-term heat storage and controllable heat release phase change material according to claim 1, characterized in that, The side of the shell is also provided with a flange window for observing the physical state and liquid level of the phase change material.

3. The heat accumulator heater based on long-term heat storage and controllable heat release phase change material according to claim 2, characterized in that, The heating mechanism includes several electric heaters and several thermocouples;The electric heater and thermocouple are fixed on the box; 4. The heat accumulator heater based on long-term heat storage and controllable heat release phase change material according to claim 3, characterized in that, The electric heater is used to heat the phase change material, convert electric energy into heat energy, and store it in the phase change material; The thermocouple is used to measure the temperature inside the box. The several electric heaters are connected in parallel by two or more groups of electric heaters.

5. The long-term heat storage and controllable heat release phase change material-based heat accumulator heater according to claim 4, characterized in that, The several thermocouples include a first thermocouple, a second thermocouple and a third thermocouple; 6. The long-term heat storage and controllable heat release phase change material-based heat accumulator heater according to claim 4, characterized in that, The tip of the first thermocouple is in contact with the electric heater, and the distance between its temperature measuring part and the upper cover is set to 10-15 cm, for measuring the temperature of the electric heater to ensure that the phase change material is not decomposed; The second thermocouple is arranged in parallel with the stirrer, and the temperature measuring tip is about 1 cm away from the stirrer, for judging the physical state of the phase change material near the stirrer to control the action of the stirrer; The third thermocouple is located at the bottom edge of the warmer and is fixedly connected with the shell, for monitoring the physical state of the phase change material in the box to control the energy storage mode of the warmer. The stirring mechanism includes a stirrer, a bracket and a motor, which are fixedly connected in sequence; 7. The long-term heat storage and controllable heat release phase change material-based heat accumulator heater according to claim 6, characterized in that, The stirrer adopts a push-type stirring paddle form and is hoisted on the motor through a coupling;Its rotating rod is fixed to the bottom of the bracket; The bracket is fixedly connected with the upper cover, and the motor is located on the upper surface of the bracket. The trigger mechanism includes a sliding module and a trigger; 8. The long-term heat storage and controllable heat release phase change material-based heat accumulator heater according to claim 7, characterized in that, The sliding module is tightly connected to the upper cover in sequence through a flange and a sealing film;The trigger is bonded to the moving position of the sliding module. The sealing film adopts a multi-layer structure, which is stacked by a polytetrafluoroethylene layer and a rubber layer. 9.The heat storage type heater based on long-term heat storage and controllable heat release phase change material according to claim 8, characterized in that, The phase change material uses a long-term energy storage phase change material across seasons.

10. The long-term heat storage and controllable heat release phase change material-based heat accumulator heater according to claim 1, characterized in that, ​

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