WO2020211464A1 - Composite phase change energy storage material and phase change heat storage heating device - Google Patents

Abstract

Provided are a composite phase change energy storage material and a phase change heat storage heating device. The phase change heat storage heating device comprises a housing (1), a heat dissipation assembly (2) and a heat storage unit located in the housing; the heat storage unit comprises a heat storage container (3), an electric heating element (31), a heat conduction assembly (32) and a phase change heat storage medium (33), wherein the electric heating element (31) and the heat conduction assembly (32) are both located at an inner part of the heat storage container (3), the heat conduction assembly (32) is immersed in the phase change heat storage medium (33), and the heat conduction assembly (32) and the electric heating element (31) have heat conduction; a heat exchange air duct (4) that communicates with an outer part of the housing (1) is formed between the housing (1) and the outer wall of the heat storage container (3), a first end of the heat dissipation assembly (2) extends into the heat storage container (3) and makes contact with the phase change heat storage medium (33), and a second end of the heat dissipation assembly (2) is located in the heat exchange air duct (4); and the phase change heat storage medium (33) is used to absorb heat generated by the electric heating element (31) and dissipate the heat to the outer side of the housing (1) by mean of the heat dissipation assembly (2). The present phase change heat storage heating device has a high electric energy utilization rate and high heating thermal efficiency.

Description

Composite phase change energy storage material and phase change heat storage heating device

This application requires that the application date is April 19, 2019, the application number is 201910318118. 1, the application name is "a heat storage heating device" Chinese patent application, the application date is April 19, 2019, the application number is 201920539466.7, application The priority of the Chinese patent application titled "A heat storage heating device", the entire content of which is incorporated in this application by reference.

Technical field

This application relates to the technical field of electric heating, in particular to a composite phase change energy storage material and a phase change heat storage heating device.

Background technique

An electric heater is a device that converts electrical energy into heat energy and transfers the heat energy to the indoor air by means of heat convection. Compared with traditional heating methods that use wall-hung boilers or coal-fired boilers for heating, electric heaters emit more heat, and do not produce any harmful gases or operating noise. Encouraged by the country’s vigorous promotion of clean heating, replacing traditional coal and natural gas heating with electric heating is conducive to protecting the environment and optimizing resource utilization.

Regenerative electric heater is a very important kind of electric heater. It is filled with heat storage materials such as heat transfer oil. When the power is turned on, the heat transfer oil around the electric heating tube is heated, and the heat is dissipated along the heat sink Therefore, this kind of thermal storage electric heater is also called oil-filled electric heater. Due to the heat storage function of the heat storage material, even in the case of a sudden power failure, the electric heater will maintain a certain temperature and dissipate heat for a long time, so it can be energized and stored during the valley power period to store heat It is used during the peak power period of the power grid to respond to the call of shifting the peak and filling the valley to optimize the power supply efficiency of the power grid, and to reduce the power waste caused by the increasing peak-valley difference of the current power grid in my country.

However, how to further increase the electric energy utilization rate of electric heaters and increase the heating thermal efficiency is still a technical problem that needs to be solved at present.

Summary of the invention

The present application provides a composite phase change energy storage material and a phase change heat storage heating device. The phase change heat storage heating device has higher electric power utilization rate and heating thermal efficiency.

In one aspect, the present application provides a phase change heat storage heating device, which includes a housing, a heat dissipation component, and a heat storage unit located in the housing;

The heat storage unit includes a heat storage container, an electric heating element, a heat conduction component, and a phase change heat storage medium; the electric heating element and the heat conduction component are both located inside the heat storage container, the heat conduction component is immersed in the phase change heat storage medium, and the heat conduction component It has heat conduction with the electric heating element; a heat exchange air duct communicating with the outside of the housing is formed between the shell and the outer wall of the heat storage container, and the first end of the heat dissipation component extends into the heat storage container and contacts the phase change heat storage medium, The second end of the heat dissipation component is located in the heat exchange air duct;

The phase change heat storage medium is used for absorbing the heat generated by the electric heating element and dissipating the heat to the outside of the shell through the heat dissipation component.

Optionally, the heat dissipation component and the electric heating element are respectively located at opposite ends of the heat storage container.

Optionally, the heat-conducting component includes at least two heat-conducting plate groups arranged at intervals, the first end of the heat-conducting plate group has heat conduction with the electric heating element, and the second end of the heat-conducting plate group extends toward the heat-dissipating component, on the heat-conducting plate group It has a plurality of heat conducting parts arranged at intervals.

Optionally, each heat-conducting plate group includes two oppositely arranged heat-conducting plates, the two heat-conducting plates are arranged close to each other on one side of the plate, and the heat-conducting part is located on the side of the two heat-conducting plates facing away from each other. on.

Optionally, the heat-conducting part is a protrusion that protrudes from one side of the heat-conducting plate that is close to each other to the side facing away from each other, and the positions of the heat-conducting parts on the two heat-conducting plates in the same heat-conducting plate group are opposite to each other so as to share Enclosed into a containing cavity.

Optionally, the heat-conducting plate is further provided with a spacer on a surface that faces away from another heat-conducting plate in the same heat-conducting plate group, and the spacer abuts against the spacers on the heat-conducting plates of the adjacent heat-conducting plate group.

Optionally, a plurality of spacers are provided on the heat conducting plate, and the spacers are located at the end area of the heat conducting plate.

Optionally, the electric heating element sequentially penetrates all the heat conducting plates in a direction perpendicular to the heat conducting plate.

Optionally, the heat dissipation assembly includes a base plate, a first heat dissipation fin, and a second heat dissipation fin. The first heat dissipation fin and the second heat dissipation fin are respectively located on opposite sides of the base plate, and the first heat dissipation fin is located inside the heat storage container and In contact with the phase change heat storage medium, the second heat dissipation fin is located in the heat exchange air duct.

Optionally, the housing includes an air inlet and an air outlet, a heat exchange air duct is formed between the air inlet and the air outlet, and the second end of the heat dissipation component is located at the air outlet.

Optionally, an insulation layer is provided on the outer wall of the heat storage container.

Optionally, the phase change heat storage medium is a graphene composite phase change heat storage medium.

Optionally, the weight percentage of graphene in the graphene composite phase change heat storage medium is 1%-10%.

On the other hand, the present application provides a composite phase change energy storage material, which includes a thermally conductive material and a phase change material, and the thermally conductive material accounts for 1%-10% by weight.

Optionally, the phase change material is paraffin wax.

Optionally, the thermal conductive material includes at least one of graphene, carbon nanotubes, carbon nanowires, copper powder, silicon powder, micro-nano graphite powder, and carbon powder.

The phase change heat storage heating device provided by the present application is composed of a shell, a heat dissipation component and a heat storage unit. The heat dissipation component and the heat storage unit are located inside the shell. The heat storage unit consists of a heat storage container and an electric A heating element and a heat-conducting component are used to convert electrical energy into heat. The electric heating element can transfer heat to the heat-conducting component through thermal conduction. Since the heat-conducting component is immersed in the phase change heat storage medium, the heat of the heat-conducting component can be The phase change heat storage medium is transferred to the surrounding, and the phase change heat storage medium stores heat. By forming a heat exchange air duct between the shell and the outer wall of the heat storage container, the heat exchange air duct communicates with the outside, so that outside air can enter the phase change heat storage heating device through the heat exchange air duct, and the heat dissipation component is arranged in the heat exchange air The first end of the heat dissipation component extends into the heat storage container and is in contact with the phase change heat storage medium. The second end of the heat dissipation component is located in the heat exchange air duct. The heat stored by the phase change heat storage medium can be transferred to the heat dissipation component. At the first end, the air in and around the heat exchange duct absorbs heat through the first end of the heat dissipating component, and then the hot air is sent to the outside through the second end of the heat dissipating component, thereby realizing the phase change heat storage heating device and Convection heat exchange of the surrounding air. The phase change heat storage heating device of the present application can improve the comprehensive thermodynamic performance of the phase change heat storage heating device by using the phase change heat storage medium to transfer and store heat, increase the thermal conductivity of the heat storage medium, and make full use of the valley electricity heat storage , Avoiding the peak power consumption of the grid, can play a positive effect of shifting peaks and filling valleys, thereby improving the thermal efficiency of the phase change heat storage heating device while increasing the power utilization rate of the device.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are Some examples of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a front view of a phase change heat storage heating device provided by an embodiment of the application;

Figure 2 is a top view of a phase change heat storage heating device provided by an embodiment of the application;

Figure 3 is a side view of a phase change heat storage heating device provided by an embodiment of the application;

Figure 4 is a cross-sectional view of Figure 1 A-A;

Figure 5 is a B-B sectional view of Figure 3;

Figure 6 is a C-C cross-sectional view of Figure 1;

Figure 7 is a front view of a heat dissipation assembly and a thermal storage container provided by an embodiment of the application;

Figure 8 is a D-D cross-sectional view of Figure 7;

Figure 9 is an E-E cross-sectional view of Figure 7;

Figure 10 is a top view of a heat dissipation assembly and a thermal storage container provided by an embodiment of the application;

Figure 11 is a side view of a heat dissipation assembly and a heat storage container provided by an embodiment of the application;

Figure 12 is a F-F sectional view of Figure 11;

Figure 13 is a schematic structural diagram of a thermal storage container provided by an embodiment of the application;

Figure 14 is a top view of Figure 13;

FIG. 15 is a front view of a heat conduction component provided by an embodiment of the application;

FIG. 16 is a top view of a heat conducting component provided by an embodiment of the application;

Figure 17 is a side view of a heat conducting component provided by an embodiment of the application;

Figure 18 is a G-G sectional view of Figure 17;

Figure 19 is a H-H cross-sectional view of Figure 15;

Figure 20 is a cross-sectional view of Figure 15 I-I;

FIG. 21 is a schematic structural diagram of a heat conducting plate provided by an embodiment of the application;

Figure 22 is a right side view of Figure 21;

Figure 23 is a left side view of Figure 21;

Figure 24 is a top view of Figure 21;

FIG. 25 is a schematic structural diagram of a heat conducting plate group provided by an embodiment of the application;

Figure 26 is a right side view of Figure 25;

Figure 27 is a top view of Figure 25;

28 is a schematic diagram of the connection structure of two adjacent heat conducting plates provided by an embodiment of the application;

Figure 29 is a right side view of Figure 28;

Figure 30 is a top view of Figure 28;

31 is a schematic diagram of the connection structure of three adjacent heat conducting plates provided by an embodiment of the application;

Figure 32 is a top view of Figure 31;

FIG. 33 is a schematic structural diagram of the connection between the heat conducting plate and the sealing plate provided by an embodiment of the application;

Figure 34 is a top view of Figure 33;

35 is a schematic structural diagram of a sealing plate provided by an embodiment of the application;

36 is a schematic structural diagram of another sealing plate provided by an embodiment of the application;

FIG. 37 is a schematic structural diagram of a heat dissipation component provided by an embodiment of the application;

Figure 38 is a top view of Figure 37;

FIG. 39 is a schematic structural diagram of an electric heating element provided by an embodiment of the application.

Description of reference signs:

1-Shell; 11-air inlet; 12-air outlet;

13-Handheld part; 2-Heat dissipating components; 21-Substrate;

22-First heat dissipation fin; 23-Second heat dissipation fin; 3-Heat storage container;

31-Electric heating element; 311-connector; 312-bolt;

313-Electrical connection line; 32-Heat conduction component; 321-Heat conduction board group;

3211-Heat conduction plate; 3212-Heat conduction part; 3213-Spacer part;

3214-Sealing plate; 33-Phase change heat storage medium; 34-Extended flange;

35-Locking bolt; 36-Inner flange; 37-Locking screw;

4-Heat exchange duct; 5-Insulation layer; 6-Support part;

61- Fasten the screws.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

Figure 1 is a front view of a phase change heat storage heating device provided by an embodiment of the application. Figure 2 is a top view of a phase change heat storage heating device provided by an embodiment of the application. Figure 3 is a side view of a phase change heat storage heating device provided by an embodiment of the application. Fig. 4 is a cross-sectional view taken along the line A-A in Fig. 1. Fig. 5 is a B-B sectional view of Fig. 3. Fig. 6 is a cross-sectional view taken along line C-C in Fig. 1. Fig. 7 is a front view of a heat dissipation assembly and a heat storage container provided by an embodiment of the application. Fig. 8 is a cross-sectional view taken along the line D-D in Fig. 7. Fig. 9 is an E-E cross-sectional view of Fig. 7. Fig. 10 is a top view of a heat dissipation assembly and a heat storage container provided by an embodiment of the application. Fig. 11 is a side view of a heat dissipation assembly and a heat storage container provided by an embodiment of the application. Fig. 12 is a cross-sectional view taken along the line F-F in Fig. 11. Figure 13 is a schematic structural diagram of a thermal storage container provided by an embodiment of the application. Fig. 14 is a top view of Fig. 13.

Fig. 15 is a front view of a heat conducting component provided by an embodiment of the application. FIG. 16 is a top view of a heat conducting component provided by an embodiment of the application. Fig. 17 is a side view of a heat conducting component provided by an embodiment of the application. Fig. 18 is a G-G cross-sectional view of Fig. 17. Fig. 19 is a cross-sectional view taken along line H-H in Fig. 15. Fig. 20 is a cross-sectional view taken along the line I-I in Fig. 15. FIG. 21 is a schematic structural diagram of a heat conducting plate provided by an embodiment of the application. Fig. 22 is a right side view of Fig. 21. Fig. 23 is a left side view of Fig. 21. Fig. 24 is a top view of Fig. 21. FIG. 25 is a schematic structural diagram of a heat conducting plate group provided by an embodiment of the application. Fig. 26 is a right side view of Fig. 25; Fig. 27 is a top view of Fig. 25. FIG. 28 is a schematic diagram of the connection structure of two adjacent heat conducting plates provided by an embodiment of the application. Figure 29 is a right side view of Figure 28. Fig. 30 is a top view of Fig. 28. FIG. 31 is a schematic diagram of the connection structure of three adjacent heat conducting plates provided by an embodiment of the application. Fig. 32 is a top view of Fig. 31. FIG. 33 is a schematic structural diagram of the connection between the heat conducting plate and the sealing plate provided by an embodiment of the application. Fig. 34 is a top view of Fig. 33. FIG. 35 is a schematic structural diagram of a sealing plate provided by an embodiment of the application. FIG. 36 is a schematic structural diagram of another sealing plate provided by an embodiment of the application.

FIG. 37 is a schematic structural diagram of a heat dissipation assembly provided by an embodiment of the application. Fig. 38 is a top view of Fig. 37. FIG. 39 is a schematic structural diagram of an electric heating element provided by an embodiment of the application.

As shown in Figures 1 to 14, this embodiment provides a phase change heat storage heating device. The phase change heat storage heating device includes a housing 1, a heat dissipation component 2 and a heat storage unit located in the housing 1; The unit includes a heat storage container 3, an electric heating element 31, a heat conduction component 32, and a phase change heat storage medium 33; among them, the electric heating element 31 and the heat conduction component 32 are located inside the heat storage container 3, and the heat conduction component 32 is immersed in the phase change heat storage medium. In the medium 33, and the heat conduction component 32 and the electric heating element 31 have heat conduction; the outer wall of the housing 1 and the heat storage container 3 forms a heat exchange air duct 4 communicating with the outside of the housing 1, and the first end of the heat dissipation assembly 2 extends Into the heat storage container 3 and contact with the phase change heat storage medium 33, the second end of the heat dissipation assembly 2 is located in the heat exchange air duct 4; the phase change heat storage medium 33 is used to absorb the heat generated by the electric heating element 31, and The heat is dissipated to the outside of the housing 1 through the heat dissipation assembly 2.

The phase change heat storage heating device of this embodiment is composed of a housing 1, a heat dissipation assembly 2 and a heat storage unit. The heat dissipation assembly 2 and the heat storage unit are located in the housing 1, and the heat dissipation assembly 2 and the heat storage unit are processed through the housing 1. It protects, and through the shell 1, the heat dissipation component 2 and the heat storage unit form an integral phase change heat storage heating device; the heat storage unit is used to generate and store heat, and the heat dissipation component 2 is used to exchange the heat of the heat storage unit to the outside , Convection heat exchange with the ambient air around the phase change heat storage heating device, thereby increasing the indoor temperature.

The heat storage unit is composed of a heat storage container 3, an electric heating element 31, a heat conduction component 32, and a phase change heat storage medium 33. The interior of the heat storage container 3 is a hollow structure, and the electric heating element 31 and the heat conduction component 32 are housed in the heat storage. In the hollow cavity of the container 3, the electric heating element 31 is used to connect with an external power source to convert electrical energy into heat through the electric heating element 31. The heat conduction element and the electric heating can conduct heat, and the heat generated by the electric heating element 31 can be Conduction to the thermal element. Moreover, by immersing the heat-conducting element in the phase-change heat storage medium 33, that is to say, the heat-conducting element is filled with the phase-change heat-storage medium 33 around the heat-conducting element, and the heat-conducting element can transfer heat to the phase-change heat storage medium 33 around it. The variable heat storage medium 33 stores heat, and when the heat needs to be dissipated outside, the heat stored in the phase change heat storage medium 33 can be transferred to the ambient air around the phase change heat storage heating device through the heat dissipation assembly 2.

There is a heat exchange air duct 4 between the shell 1 of the phase change heat storage heating device and the outer wall of the heat storage container 3, and the heat exchange air duct 4 communicates with the outside, that is, the ambient air can enter the phase change heat storage through the shell 1 Heat exchange air duct 4 in the heating device. The heat dissipation assembly 2 is arranged in the heat exchange air duct 4. Specifically, the first end of the heat dissipation assembly 2 extends into the heat storage container 3, and the first end of the heat dissipation assembly 2 and the phase change heat storage in the heat storage container 3 When the medium 33 is in contact, the second end of the heat dissipation component 2 is located in the heat exchange air duct 4. The heat stored in the phase change heat storage medium 33 can be conducted to the first end of the heat dissipation component 2, and then the heat is conducted through the first end of the heat dissipation component 2 To the second end of the heat dissipation component 2, the second end of the heat dissipation component 2 can exchange heat with the ambient air in the heat exchange air duct 4 and around the heat dissipation component 2, so that the ambient air absorbs heat, and the ambient air takes away the heat dissipation component 2 and radiates it The heat of the heat flows into the surrounding environment outside the phase change heat storage heating device, thereby increasing the ambient temperature.

It should be noted that the phase-change heat storage medium 33 of this embodiment can absorb the heat generated by the electric heating element 31, and store the heat. When necessary, the stored heat is dissipated to the outside of the housing 1 through the heat dissipation assembly 2 to Increase the ambient temperature.

In this embodiment, the phase change heat storage medium 33 is used for heat transfer and storage, which can improve the heat transfer efficiency and can improve the energy utilization rate. At present, the solid-liquid phase change energy storage material is widely used. In this embodiment, the phase change heat storage medium 33 is a solid-liquid phase change energy storage material as an example. The heat generated by the electric heating element 31 is transferred to the solid-liquid phase change energy storage material. Liquid phase change energy storage material, the temperature of the solid-liquid phase change energy storage material increases, when the temperature of the solid-liquid phase change energy storage material is higher than the phase change temperature of the material, the phase changes from solid to liquid, absorbing heat ; When the temperature is lower than the phase transition temperature of the material, the phase changes from liquid to solid, giving off heat. The heat absorption and exothermic process of the solid-liquid phase transition energy storage material is a reversible process, so the solid-liquid phase transition energy storage material can be reused.

In the actual use process of the phase change heat storage heating device of this embodiment, the phase change heat storage medium 33 can be heated by the electric heating element 31 during the valley electricity period at night to increase the temperature of the phase change heat storage medium 33 High, the phase change heat storage medium 33 absorbs the heat generated by the electric heating element 31 and stores the heat; and during the peak power period of the power grid, the electrical connection between the phase change heat storage heating device and the external power supply can be disconnected, so that the electric heating element 31 does not work, the temperature of the phase change heat storage medium 33 drops below the phase change temperature of the material, the phase changes from liquid to solid, and the phase change heat storage medium 33 emits heat to the outside, and the released heat passes through the heat sink 2 and the ambient air Convection heat exchange and increase the ambient temperature. In this way, by using the phase-change heat storage medium 33 for heat absorption, storage and release, the phase-change heat storage heating device can make full use of the electric energy in the valley period to store heat, and use the stored heat to exchange heat during the peak power period of the grid , Increase the ambient temperature, which is in line with the trend of shifting peaks and valleys to optimize the power supply efficiency of the power grid, and can improve the utilization rate of electric energy by the phase change heat storage heating device.

Optionally, the phase change heat storage medium 33 may be a graphene composite phase change heat storage medium. In this embodiment, the phase change heat storage medium 33 used for heat conduction and heat storage can be an organic phase change material. Specifically, the base material of the organic phase change material can be paraffin or stearic acid, preferably paraffin, heat of fusion of paraffin The specific heat capacity is 2.14～2.9J·g and the heat of fusion is 200～220J·g. However, the disadvantage of paraffin wax is its low thermal conductivity, 0.15W/m·℃, and poor thermal conductivity.

Therefore, in view of the low thermal conductivity of paraffin wax, in order to improve the thermal conductivity of paraffin wax and improve the comprehensive thermodynamic performance of the phase-change heat storage heating device, in this embodiment, a heat-conducting material is mixed with paraffin wax to form a phase-change heat storage medium 33. Among them, the mixed thermal conductive material may include copper powder, silicon powder, micro-nano graphite powder, carbon powder, carbon nanowires, carbon nanotubes, and graphene. Graphene is preferred in this embodiment. The resistivity of graphene is only about 10-6Ω·cm, which is lower than copper or silver. The thermal conductivity is 5300W/m·℃. The specific surface area of graphene is large, reaching 2630m2/g. The thermal conductivity of graphene is paraffin wax. It can form a larger contact and thermal conduction area with paraffin wax, which can significantly improve the thermal conductivity of paraffin wax. Among them, the fewer and thinner graphene material layers are, the better the thermal conductivity.

In this embodiment, in the ratio of the graphene composite phase change heat storage medium 33, the weight percentage of graphene may be 1%-10%.

In a possible implementation, the heat dissipation assembly 2 and the electric heating element 31 may be located at opposite ends of the heat storage container 3 respectively. As shown in Figures 4 to 14, in this embodiment, the heat dissipation assembly 2 and the electric heating element 31 are located at the two ends of the heat storage container 3, so that the heat conduction assembly 32 can be arranged between the electric heating element 31 and the heat dissipation assembly 2, and The heat-conducting component 32 is filled with phase-change heat storage medium 33. As a result, the heat generated by the electric heating element 31 is transferred to the heat-conducting component 32, and the heat-conducting component 32 can conduct the heat to the phase-change heat storage medium 33 around it, so that The phase change heat storage medium 33 stores heat, and the phase change heat storage medium 33 releases the heat to the external environment through the heat dissipation component 2 when needed.

By arranging the heat dissipation assembly 2 and the electric heating element 31 at both ends of the heat storage container 3, the heat conduction assembly 32 is located between the heat dissipation assembly 2 and the electric heating element 31, so that the phase change heat storage medium 33 around the heat conduction assembly 32 can pass through Stores heat, avoiding that the heat generated by the electric heating element 31 does not pass through the heat-conducting component 32 and the phase-change heat storage medium 33, and is directly dissipated to the external environment through the heat-dissipating component 2, avoiding excessive heat loss to the environment, resulting in ineffective heat and waste Energy, but can store heat through the phase-change heat storage medium 33, and when needed, the phase-change heat storage medium 33 will then radiate heat to the outside through the heat dissipating component 2. This ensures that the released heat can be fully utilized and can increase thermal energy. Utilization rate.

Specifically, the electric heating element 31 can be arranged at the lower end of the heat storage container 3, and the heat dissipation assembly 2 is arranged at the upper end of the heat storage container 3. The heat conduction assembly 32 is located between the electric heating element 31 and the heat dissipation assembly 2, and the electric heating element 31 generates The heat is transferred upwards to the heat-conducting component 32. The heat-conducting component 32 transfers the heat to the phase-change heat storage medium 33 around it and stores the heat by the phase-change heat storage medium 33. The phase-change heat storage medium 33 releases the heat when needed. , And the heat dissipating component 2 conducts thermal convection with the ambient air to increase the external ambient temperature.

In a possible implementation, the heat conduction assembly 32 may include at least two heat conduction plate groups 321 spaced apart, the first end of the heat conduction plate group 321 has heat conduction with the electric heating element 31, and the first end of the heat conduction plate group 321 The two ends extend toward the heat dissipation assembly 2, and the heat conducting plate group 321 has a plurality of heat conducting parts 3212 arranged at intervals.

As shown in FIGS. 15 to 34, the heat conducting assembly 32 can be formed by connecting a plurality of heat conducting plate groups 321. The plurality of heat conducting plate groups 321 can be arranged in parallel and spaced apart. The first end of the heat conducting plate group 321 can be connected to the electric heating element 31. The second end of the heat conduction plate group 321 extends toward the heat dissipation assembly 2. The phase change heat storage medium 33 between adjacent heat conduction plate groups 321 and the periphery of each heat conduction plate group 321 are filled with the phase change heat storage medium 33. The heat is transferred to the heat-conducting plate group 321 through the first end of the heat-conducting plate group 321. The heat-conducting plate group 321 can transfer heat to the phase-change heat storage medium 33 around it. At the second end of the heat-conducting plate group 321, phase-change heat storage The heat stored in the medium 33 can be transferred to the heat dissipation assembly 2, and the heat dissipation assembly 2 releases the heat to the outside. Among them, the heat conducting plate group 321 is provided with a plurality of heat conducting parts 3212 arranged at intervals. The contact area between the heat conducting plate group 321 and the phase change heat storage medium 33 can be increased by the heat conducting parts 3212 arranged at intervals, that is, the heat conducting part 3212 increases The heat transfer area between the heat conducting plate group 321 and the phase change heat storage medium 33 is enlarged, which is beneficial to the heat conduction between the heat conduction plate group 321 and the phase change heat storage medium 33, and can improve the phase change heat storage in the heat storage container 3 The temperature uniformity of the medium 33 is more conducive to the phase change heat storage medium 33 to store heat and release heat to the outside.

Taking the heat storage container 3 as a cubic shape as an example, a plurality of spaced apart heat conducting plate groups 321 can be arranged along the length direction of the heat storage container 3, and the length direction of the heat conducting plate group 321 itself is along the height direction of the heat storage container 3. The first end of the heat-conducting plate group 321 is close to the lower end of the heat storage container 3, and the second end of the heat-conducting plate group 321 is close to the upper end of the heat storage container 3. The width of the plate surface of the heat-conducting plate group 321 may be along the width of the heat storage container 3. The outer wall of the housing 1 extending in the height and length directions of the heat storage container 3 is the front of the heat storage container 3, the plate surface of the heat-conducting plate group 321 is parallel to the side surface of the heat-storage container 3, and all the heat-conducting plate groups 321 The plates are parallel to each other; among them, the spaced heat conducting portions 3212 are located on the plate surface of the heat conducting plate group 321. By providing the heat conducting portions 3212, the contact area between the heat conducting plate group 321 and the phase change heat storage medium 33 is increased.

It should be noted that for phase change heat storage heating devices of different sizes, the number of spaced heat conducting plate groups 321 arranged in the heat storage container 3 can be different, and the size of the heat conducting plate groups 321 can also be different, arranged at intervals The number of heat conducting parts 3212 on the heat conducting plate group 321 and the distance between two adjacent heat conducting parts 3212 can be different; according to the specific board width of the heat conducting plate group 321, the heat conducting parts 3212 can be arranged in one row, two rows or even more. Multiple columns, this application does not make specific restrictions on this.

As shown in Figures 21 to 27, each heat conducting plate group 321 may include two oppositely arranged heat conducting plates 3211, the two heat conducting plates 3211 are arranged close to each other on one side of the board, and the heat conducting parts 3212 are located in two One side of the heat conducting plate 3211 facing away from each other is on the surface.

Specifically, each heat-conducting plate group 321 may be composed of two heat-conducting plate groups 321, the two heat-conducting plates 3211 are arranged opposite to each other, and the side surfaces of the two heat-conducting plates 3211 close to each other are attached to each other to form the heat-conducting plate group 321. A heat-conducting plate group 321 is formed by the two heat-conducting plates 3211 being relatively bonded together, and the heat-conducting parts 3212 are arranged on the heat-conducting plate 3211 at intervals on the surface of the two heat-conducting plates 3211 facing away from each other.

Wherein, the heat conducting portion 3212 may be a protrusion from the side of the heat conducting plate 3211 that is close to each other to the side facing away from each other, and the position of the heat conducting portion 3212 on the two heat conducting plates 3211 in the same heat conducting plate group 321 On the contrary, to jointly enclose a containing cavity.

As shown in Figures 25 and 27, the heat conduction portion 3212 is a protrusion arranged at intervals on the surface of the heat conduction plate 3211. For the heat conduction plate group 321, the protrusion directions of the protrusions on the two heat conduction plates 3211 deviate from each other, that is, It is said that the heat conduction part 3212 on the heat conduction plate 3211 protrudes toward the outside of the heat conduction plate group 321; and the positions of the heat conduction parts 3212 on the two heat conduction plates 3211 correspond to that of the two heat conduction parts on the two heat conduction plates 3211. As far as 3212 is concerned, the two heat conducting parts 3212 both protrude in a direction away from the heat conducting plate group 321, so that the two heat conducting parts 3212 can jointly form a containing cavity, and two corresponding heat conducting parts of the two heat conducting plates 3211 The phase change heat storage medium 33 can be filled in an accommodating cavity jointly enclosed by the parts 3212.

The two heat-conducting plates 3211 of the heat-conducting plate group 321 are each provided with a plurality of heat-conducting portions 3212 protruding outwardly corresponding to each other, so that by bonding the two heat-conducting plates 3211, the multiple heat-conducting portions on the two heat-conducting plates 3211 3212 can form multiple accommodating cavities, all of which are filled with phase change heat storage medium 33. On the one hand, the part of the heat conduction plate 3211 where the heat conduction part 3212 is not provided is a flat structure, and the two heat conduction plates 3211 can be attached to each other through the planar structure of the part where the heat conduction part 3212 is not provided, which is convenient for fixing the two heat conduction plates 3211. A heat-conducting plate group 321; on the other hand, the two heat-conducting plates 3211 are correspondingly provided with a plurality of heat-conducting parts 3212 protruding outward, and the heat-conducting parts 3212 of the two heat-conducting plates 3211 can jointly form a plurality of accommodating cavities. Filling the accommodating cavity with the phase change heat storage medium 33 can make each heat conducting plate group 321 have the phase change heat storage medium 33 inside, which can speed up the heat transfer between the heat conduction plate 3211 and the phase change heat storage medium 33, and also It is beneficial for the phase change heat storage medium 33 to store heat.

Specifically, through the accommodating cavity formed between the two heat-conducting plates 3211 of the heat-conducting plate group 321, the inside of the heat-conducting plate group 321 can be filled with the phase change heat storage medium 33, and the two adjacent heat-conducting plate groups 321 are also It is filled with the phase change heat storage medium 33, so that the heat generated by the electric heating element 31 can be transferred to the surface of the heat conducting plate 3211 through the first end of the heat conducting plate group 321. The heat conducting plate 3211 and the heat conducting plate group 321 where the heat conducting plate 3211 is located Both the phase-change heat storage medium 33 in the accommodating cavity and the phase-change heat storage medium 33 on its periphery can perform heat transfer, which can speed up the heat transfer between the heat conducting plate 3211 and the phase-change heat storage medium 33, thereby making electricity The heat generated by the heating element 31 is sufficiently conducted to the phase change heat storage medium 33, and the phase change heat storage medium 33 stores the heat.

As shown in FIGS. 28 to 32, in a possible implementation manner, a space 3213 may be further provided on the surface of the heat conducting plate 3211 that is away from another heat conducting plate 3211 in the same heat conducting plate group 321. The spacing part 3213 It abuts against each other with the spacing portion 3213 on the heat conducting plate 3211 of the adjacent heat conducting plate group 321.

The heat-conducting plate 3211 may also be provided with a spacer 3213. For the heat-conducting plate group 321, the protruding direction of the spacer 3213 on one of the heat-conducting plates 3211 is away from the other heat-conducting plate 3211, that is to say, two of the same heat-conducting plate group 321 The spacers 3213 on each heat conducting plate 3211 all protrude toward the outside of the heat conducting plate group 321. In addition, in the two adjacent heat conducting plate groups 321, the spacing portions 3213 of the two adjacent heat conducting plates 3211 abut against each other, and the abutment of the spacing portions 3213 can fix the gap between the two adjacent heat conducting plate sets 321 spacing. In this way, for the plurality of heat conducting plate groups 321 arranged at intervals in the heat conducting assembly 32, the spacing portions 3213 of every two adjacent heat conducting plate groups 321 abut each other, so that the relative positions of all the heat conducting plate groups 321 can be fixed. In addition, the distances between adjacent heat conducting plate groups 321 are uniform, so that the phase change heat storage medium 33 around each heat conducting plate group 321 in the heat storage container 3 is more evenly distributed, which can improve the heat storage container 3 The temperature uniformity of the phase change heat storage medium 33 improves the heat storage and heat conduction performance of the phase change heat storage medium 33.

In addition, the spacing portion 3213 of the heat conducting plate 3211 abuts against the spacing portion 3213 of the adjacent heat conducting plate group 321 to fix the distance between the adjacent heat conducting plate groups 321. For the same heat conducting plate group 321, two The spacing portions 3213 of the two heat conducting plates 3211 correspond to each other. The spacing portions 3213 of the two heat conducting plates 3211 can also jointly enclose a containing cavity, and the containing cavity enclosed by the spacing portion 3213 can also be filled with a phase change heat storage medium 33 , In order to enhance the thermal conductivity between the heat conducting plate 3211 and the phase change heat storage medium 33, and at the same time facilitate the phase change heat storage medium 33 to store heat.

Specifically, a plurality of spacers 3213 may be provided on the heat conducting plate 3211, and the spacers 3213 are located at the end area of the heat conducting plate 3211. By providing spacers 3213 at both ends of the heat conducting plate 3211, the relative positions between the adjacent heat conducting plate groups 321 are fixed through the two ends of the heat conducting plate 3211. The spacers 3213 at both ends of the heat-conducting plate 3211 of the plate group 321 abut against each other, which can enhance the stability of the connection between adjacent heat-conducting plate groups 321, and can ensure that between the adjacent heat-conducting plate groups 321, from the first heat-conducting plate group 321 The distance from one end to the second end is kept consistent, so that the uniformity and stability of heat conduction between the heat conducting plate group 321 and the phase change heat storage medium 33 can be ensured.

Wherein, at least one spacer 3213 may be provided at both ends of the heat conducting plate 3211 respectively, and the relative position between the adjacent heat conducting plate groups 321 is fixed by the two spacers 3213 at both ends of the heat conducting plate 3211. For the thermally conductive plate 3211 with a larger size, two or more spacers 3213 can also be provided at both ends of the thermally conductive plate 3211, so as to improve the stability of the connection of the adjacent thermally conductive plate groups 321 through the abutment of the multiple spacers 3213. Sex.

It should be noted that, in the heat conducting plate group 321, the heat conducting portions 3212 and the spacers 3213 provided on the two heat conducting plates 3211 protrude in a direction away from the heat conducting plate group 321, and the protruding degree of the spacers 3213 is greater than that of the heat conducting portion 3212. The degree of protrusion of the adjacent heat conducting plate groups 321 can abut against each other, and the heat conducting parts 3212 between the adjacent heat conducting plate groups 321 have a distance; A certain interval and space are formed, thereby increasing the heat transfer area between the phase change heat storage medium 33 and the heat conducting plate group 321 in the space, so that the phase change heat storage medium 33 and the heat conducting plate group 321 in the space are Form sufficient heat exchange between them to enhance heat storage performance.

The shape and size of the spacers 3213 at both ends of the heat conducting plate 3211 and the plurality of heat conducting parts 3212 spaced apart on the heat conducting plate 3211 are not limited in this embodiment. Since the spacer 3213 can serve to connect and fix the adjacent heat conducting plate group 321, the cross-sectional area of the spacer 3213 can be larger than the cross-sectional area of the heat conducting part 3212 to enhance the connection strength of the adjacent heat conducting plate group 321; 3212 is mainly used to increase the contact area between the heat conducting plate 3211 and the phase change heat storage medium 33, and its cross-sectional area can be slightly smaller. In a specific embodiment, the spacer 3213 may be a conical protrusion with a gradually decreasing cross-sectional area, and the heat conducting portion 3212 may be a rectangular tapered protrusion with a gradually decreasing cross-sectional area, in which the circular cone is convex. The cross-sectional area is larger than the cross-sectional area of the rectangular cone protrusion.

In addition, as shown in FIGS. 33 to 36, the thermally conductive component 32 may also include sealing plates 3214 arranged on both sides of the plurality of interconnected thermally conductive plate groups 321. By providing the sealing plates 3214 on both sides, the thermally conductive component 32 can be formed into one As for the overall structure, the sealing plates 3214 on both sides can be set in a flat structure. By providing the sealing plates 3214 on both sides, the overall strength of the heat conduction assembly 32 can be improved, and the connection and fixation of the heat conduction assembly 32 in the heat storage container 3 is facilitated.

As shown in Figures 5, 6 and 9, there may be a gap between the heat conducting assembly 32 formed by the heat conducting plate group 321 and the sealing plate 3214 and the side wall of the heat storage container 3, and the heat conducting plate group 321 extends toward There is also a gap between the second end of the heat dissipating component 2 and the top wall of the heat storage container 3, so that the phase change heat storage medium 33 inside the heat storage container 3 and filled around the heat conducting component 32 is in communication with each other, which is beneficial to the phase change The variable heat storage medium 33 stores heat, and can improve the uniformity of heat conduction by the phase change heat storage medium 33.

Wherein, the heat conducting plate 3211 and the sealing plates 3214 on both sides of the heat conducting assembly 32 may be made of metal materials, and it may be preferable that the heat conducting plate 3211 and the sealing plate 3214 are carbon steel thin plates. The carbon steel material has low cost and good processing performance, and its thermal conductivity is 41.163W/m·℃, which can meet the requirements of the heat conducting plate 3211 and the sealing plate 3214.

As shown in Figures 25 to 34, for the connection between the heat conducting plates 3211, connection forms such as screw, nut fitting connection or welding connection can be adopted. Preferably, in order to ensure the connection strength and connection stability between the heat conducting plates 3211 , Welding connection can be used. Wherein, as shown in FIGS. 25-27, the welding connection between the two heat-conducting plates 3211 of the same heat-conducting plate group 321 can adopt a welding seam structure at the two ends of the heat-conducting plate 3211 to connect the two heat-conducting plates 3211 are connected oppositely to form a heat-conducting plate group 321; as shown in Figs. 28 to 30, for the welding connection between two adjacent heat-conducting plate groups 321, a weld structure may be provided on the mutually abutting spacers 3213. The abutting spacers 3213 are welded and connected together so that two adjacent heat conducting plate groups 321 are fixedly connected as a whole; as shown in Figures 31 to 34, the same is true for the welding connection and heat conduction between multiple heat conducting plate groups 321 The welding connection between the plate group 321 and the sealing plates 3214 on both sides may adopt the welding form described above.

As shown in FIG. 5, FIG. 6, FIG. 9, FIG. 18, and FIG. 20, in a possible embodiment, the electric heating element 31 may sequentially penetrate all the heat conducting plates 3211 along a direction perpendicular to the heat conducting plate 3211. The electric heating element 31 and the heat conducting assembly 32 are arranged perpendicularly. Specifically, the electric heating element 31 can be arranged at the first end of the heat conducting plate group 321, and the electric heating element 31 is arranged in the spacer 3213 of the first end of the heat conducting plate group 321. The heating element 31 penetrates through the spacers 3213 at the first end of the heat conducting plate group 321. The cavity formed by the spacer 3213 at the first end of the heat conducting plate group 321 is filled with the phase change heat storage medium 33, and the electric heating element 31 is filled with phase change The heat storage medium 33, the heat generated by the electric heating element 31 is conducted through the phase change heat storage medium 33 to the heat conduction plate group 321, and the heat conduction plate group 321 conducts the heat to the phase change heat storage medium 33 around it and is transferred from the phase change heat storage medium. 33 storage, when needed, the phase change heat storage medium 33 radiates heat to the external environment through the heat dissipation component 2.

Among them, as shown in Figure 6, Figure 8, Figure 9, Figure 11, Figure 17, Figure 20, Figure 35 and Figure 39, etc., the overall electric heating element 31 may have a U-shaped structure, and the end of the U-shaped electric heating element 31 One side of the sealing plate 3214 protruding from the heat-conducting component 32, the end of the electric heating element 31 is connected with an electric connection line 313, and the electric heating element 31 is connected with an external power supply through the electric connection line 313. A connecting piece 311 is provided on the protruding end of the electric heating element 31. The connecting piece 311 may be in the form of a flange. The protruding end of the electric heating element 31 is fixedly connected to the sealing plate 3214 by bolts 312 on the flange. The locking effect of the bolt 312 realizes the fixed connection between the electric heating element 31 and the heat conducting assembly 32.

As shown in FIGS. 8, 37, and 38, in a possible embodiment, the heat dissipation assembly 2 may include a substrate 21, a first heat dissipation fin 22, and a second heat dissipation fin 23. The first heat dissipation fin 22 And the second heat dissipation fins 23 are respectively located on opposite sides of the base plate 21, the first heat dissipation fins 22 are located inside the heat storage container 3 and are in contact with the phase change heat storage medium 33, and the second heat dissipation fins 23 are located in the heat exchange air duct 4 .

The heat dissipation assembly 2 is composed of a first heat dissipation fin 22 and a second heat dissipation fin 23 of the base plate 21. The first heat dissipation fin 22 and the second heat dissipation fin 23 are respectively located on the upper and lower sides of the base plate 21. The first heat dissipation fin 22 can extend into the heat storage container 3, and the first heat dissipation fin 22 is in contact with the phase change heat storage medium 33 in the heat storage container 3, and the second heat dissipation fin 23 is located in the heat exchange air duct 4. The heat dissipation component 2 conducts heat conduction between the first heat dissipation fins 22 and the phase change heat storage medium 33, the heat of the phase change heat storage medium 33 is conducted to the first heat dissipation fins 22, and then the heat is transferred to the first heat dissipation fins 22 The second heat dissipation fins 23 and the second heat dissipation fins 23 can exchange heat with the air in the heat exchange air duct 4 and the surrounding environment to increase the temperature of the surrounding environment.

Among them, the first heat dissipation fin 22 is immersed in the phase change heat storage medium 33, which has good thermal conductivity with the phase change heat storage medium 33, so that the heat stored by the phase change heat storage medium 33 can fully pass through the A heat dissipation fin 22 and a second heat dissipation fin 23 convectively exchange heat to the ambient air.

Optionally, the housing 1 may include an air inlet 11 and an air outlet 12, a heat exchange air duct 4 is formed between the air inlet 11 and the air outlet 12, and the second end of the heat dissipation assembly 2 is located at the air outlet 12. As shown in Figures 1 to 5, the housing 1 is provided with an air inlet 11 and an air outlet 12. The air inlet 11 can be provided at the lower part of the side wall of the housing 1, and the air outlet 12 can be provided at the upper end of the housing 1 and the heat dissipation assembly 2. At the corresponding position, the external ambient air enters the heat exchange air duct 4 between the housing 1 and the heat storage container 3 through the air inlet 11, and the ambient air flows to the air outlet 12, and the heat dissipation component 2 and the ambient air are arranged at the air outlet 12 Heat exchange is performed between them, and the heat-absorbing air enters the outside through the air outlet 12, and the ambient temperature rises.

As shown in Figures 4 to 7 and Figures 9 to 14, for the fixed connection between the heat storage container 3 and the housing 1, an extension flange 34 extending outward from the lower end of the heat storage container 3 can be used through the extension The flange 34 is attached to the inner wall of the bottom of the shell 1, and a plurality of bolts 312 holes are distributed on the outer flange 34 at the lower end of the heat storage container 3, and the outer flange 34 at the lower end of the heat storage container 3 and the inner wall of the shell 1 A sealing gasket is arranged between the heat storage container 3 and the outer flange 34 at the lower end of the heat storage container 3 is fixedly connected to the bottom of the housing 1 through the locking bolts 35 locked in the multiple bolt holes; for the heat dissipation assembly 2 and the heat storage container 3 The fixed connection method may be that the upper end of the heat storage container 3 has an inner extension flange 36 extending inward, and the edge portion of the base plate 21 of the heat dissipation assembly 2 overlaps the inner extension flange 36, and the inner end of the heat storage container 3 A plurality of screw holes are distributed on the extension flange 36, and a gasket is provided between the inner extension flange 36 at the upper end of the heat storage container 3 and the base plate 21 of the heat dissipation assembly 2, and the inner extension flange 36 at the upper end of the heat storage container 3 passes The locking screws 37 locked in the multiple screw holes fix the base plate 21 of the heat dissipation assembly 2 on the heat storage container 3. In this way, the heat dissipation assembly 2 can be fixed on the heat storage container 3 and the heat storage container 3 can be fixed in the housing 1.

As shown in Figures 1 to 5, a support part 6 is also provided at the bottom of the housing 1 of the phase change heat storage heating device. The support part 6 is used to support the phase change heat storage heating device so that the phase change heat storage heating device The contact with the ground is more stable. A plurality of fastening screws 61 are installed on the supporting part 6. The fastening screws 61 realize the fixed connection between the supporting part 6 and the housing 1, and the supporting part 6 and the housing 1 are assembled as a whole structure. In addition, the outer side wall of the housing 1 may also be provided with a hand-held part 13, specifically two hand-held parts 13 may be provided on the symmetrical side walls of the housing 1, through which the user can heat the phase change heat storage The device is transported and moved to make the use of the phase change heat storage heating device more flexible.

In addition, as shown in FIGS. 4 to 6, an insulating layer 5 may be provided on the outer wall of the heat storage container 3. By arranging the heat insulation layer 5 on the outer wall of the heat storage container 3, the heat transfer between the inside and the outside of the heat storage container 3 can be isolated, so that the heat stored in the phase change heat storage medium 33 in the heat storage container 3 is transferred to the shell through the heat dissipation assembly 2 The air outlet 12 of the body 1 is dissipated outside to prevent heat from being transferred to the housing 1 and cause unnecessary heat energy loss, which can improve the heating efficiency of the phase change heat storage heating device. The material of the heat insulation layer 5 can be aluminum silicate fiber cotton or silica aerogel. For example, the heat insulation layer 5 can be made of silica aerogel.

Another aspect of this embodiment provides a composite phase change energy storage material, which is a mixture of a thermally conductive material and a phase change material, wherein the phase change material can be paraffin or stearic acid, preferably paraffin. Paraffin wax has a large heat of fusion, with a specific heat capacity of 2.14～2.9J·g, and a heat of fusion of 200～220J·g. However, the disadvantage of paraffin wax is its low thermal conductivity, 0.15W/m·℃, and poor thermal conductivity.

Therefore, in view of the low thermal conductivity of paraffin wax, in order to improve the thermal conductivity of paraffin wax, in this embodiment, the paraffin wax is mixed with a thermally conductive material to form a phase change energy storage material. Among them, the mixed thermal conductive material may include copper powder, silicon powder, micro-nano graphite powder, carbon powder, carbon nanowires, carbon nanotubes, and graphene. Graphene is preferred in this embodiment.

The resistivity of graphene is only about 10-6Ω·cm, which is lower than copper or silver. The thermal conductivity is 5300W/m·℃. The specific surface area of graphene is large, reaching 2630m2/g. The thermal conductivity of graphene is paraffin wax. It can form a larger contact and thermal conduction area with paraffin wax, which can significantly improve the thermal conductivity of paraffin wax. Among them, the fewer and thinner graphene material layers are, the better the thermal conductivity.

Taking graphene as the thermal conductive material as an example, in the proportion of the composite phase change energy storage material, the weight percentage of graphene may be 1%-10%.

Table 1 lists the actual measured thermal conductivity of composite phase change energy storage materials formed by adding different proportions of graphene to paraffin wax, and Table 2 lists the formation of adding different proportions of graphene, carbon nanotubes, and copper powder to paraffin wax. The actual measured thermal conductivity of the composite phase change energy storage material, wherein the thermal conductivity of the composite phase change energy storage material is detected by the TCi thermal conductivity analyzer, which will not be repeated here.

Table 1

Table 2

From the test results in Table 1 and Table 2, it can be seen that the thermal conductivity of the composite phase change energy storage material has been significantly improved after the addition of graphene, carbon nanotubes and other thermally conductive materials, and within a certain range, with the increase of graphene content Large, the thermal conductivity of the composite phase change energy storage material also increases.

The phase change heat storage heating device provided by this embodiment is composed of a shell, a heat dissipation component, and a heat storage unit. The heat dissipation component and the heat storage unit are located inside the shell. The heat storage unit consists of a heat storage container and a heat storage container. An electric heating element and a thermally conductive component are used to convert electrical energy into thermal energy through the electric heating element. The electric heating element can transfer heat to the thermally conductive component through thermal conduction. Since the thermally conductive component is immersed in the phase change heat storage medium, the heat of the thermally conductive component It can be transferred to the surrounding phase change heat storage medium, and the phase change heat storage medium stores heat. By forming a heat exchange air duct between the shell and the outer wall of the heat storage container, the heat exchange air duct communicates with the outside, so that outside air can enter the phase change heat storage heating device through the heat exchange air duct, and the heat dissipation component is arranged in the heat exchange air The first end of the heat dissipation component extends into the heat storage container and is in contact with the phase change heat storage medium. The second end of the heat dissipation component is located in the heat exchange air duct. The heat stored by the phase change heat storage medium can be transferred to the heat dissipation component. At the first end, the air in and around the heat exchange duct absorbs heat through the first end of the heat dissipating component, and then the hot air is sent to the outside through the second end of the heat dissipating component, thereby realizing the phase change heat storage heating device and Convection heat exchange of the surrounding air. The phase change heat storage heating device of the present application can improve the comprehensive thermodynamic performance of the phase change heat storage heating device by using the phase change heat storage medium to transfer and store heat, increase the thermal conductivity of the heat storage medium, and make full use of the valley electricity heat storage , Avoiding the peak power consumption of the grid, can play a positive effect of shifting peaks and filling valleys, thereby improving the thermal efficiency of the phase change heat storage heating device while increasing the power utilization rate of the device.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the application range.

Claims (16)

1. A phase change heat storage heating device, which is characterized by comprising a shell, a heat dissipation component and a heat storage unit located in the shell;

   The heat storage unit includes a heat storage container, an electric heating element, a heat conduction component, and a phase change heat storage medium; wherein the electric heating element and the heat conduction component are both located inside the heat storage container, and the heat conduction component is immersed in the heat storage container. In the phase change heat storage medium, and the heat conduction component and the electric heating element have heat conduction; a heat exchange air duct communicating with the outside of the housing is formed between the shell and the outer wall of the heat storage container , The first end of the heat dissipation component extends into the heat storage container and is in contact with the phase change heat storage medium, and the second end of the heat dissipation component is located in the heat exchange air duct;

   The phase change heat storage medium is used for absorbing the heat generated by the electric heating element and dissipating the heat to the outside of the casing through the heat dissipation component.
2. The phase change heat storage heating device according to claim 1, wherein the heat dissipation assembly and the electric heating element are respectively located at opposite ends of the heat storage container.
3. The phase change heat storage heating device according to claim 2, wherein the heat conduction component comprises at least two heat conduction plate groups arranged at intervals, and the first end of the heat conduction plate group is connected to the electric heating element. There is heat conduction therebetween, the second end of the heat conducting plate group extends to the heat dissipation assembly, and the heat conducting plate group has a plurality of heat conducting parts arranged at intervals.
4. The phase-change heat storage heating device according to claim 3, wherein each heat-conducting plate group includes two heat-conducting plates arranged opposite to each other, and one side of the two heat-conducting plates close to each other is arranged in close contact with each other. , The heat conducting part is located on one side of the two heat conducting plates facing away from each other.
5. The phase change heat storage heating device according to claim 4, wherein the heat conduction portion is a bulge that protrudes from one side of the heat conducting plate that is close to each other to a side that faces away from each other, and The heat conduction parts on the two heat conduction plates in the same heat conduction plate group are positioned opposite to each other so as to jointly enclose an accommodating cavity.
6. The phase change heat storage heating device according to claim 4 or 5, characterized in that the heat conducting plate is further provided with a spacer on the surface of the heat conducting plate that is away from another heat conducting plate in the same heat conducting plate group, and the spacer It abuts against each other with the spacers on the heat conducting plates of the adjacent heat conducting plate group.
7. The phase change heat storage heating device according to claim 6, wherein a plurality of spacers are provided on the heat conducting plate, and the spacers are located at the end area of the heat conducting plate.
8. The phase change heat storage heating device according to claim 4 or 5, wherein the electric heating element sequentially penetrates all the heat conducting plates in a direction perpendicular to the heat conducting plate.
9. The phase change heat storage heating device according to claim 1, wherein the heat dissipation assembly includes a base plate, a first heat dissipation fin and a second heat dissipation fin, and the first heat dissipation fin and the second heat dissipation fin The fins are respectively located on opposite sides of the substrate, the first heat dissipation fins are located inside the heat storage container and are in contact with the phase change heat storage medium, and the second heat dissipation fins are located in the heat exchange air duct .
10. The phase change heat storage heating device according to claim 1, wherein the housing includes an air inlet and an air outlet, the heat exchange air duct is formed between the air inlet and the air outlet, and The second end of the heat dissipation component is located at the air outlet.
11. The phase change heat storage heating device according to claim 1, wherein a heat insulation layer is provided on the outer wall of the heat storage container.
12. The phase change heat storage heating device according to claim 1, wherein the phase change heat storage medium is a graphene composite phase change heat storage medium.
13. The phase change heat storage heating device according to claim 12, wherein the weight percentage of graphene in the graphene composite phase change heat storage medium is 1%-10%.
14. A composite phase change energy storage material, which is characterized in that it contains a thermally conductive material and a phase change material, and the thermally conductive material accounts for 1%-10% by weight.
15. The composite phase change energy storage material of claim 14, wherein the phase change material is paraffin wax.
16. The composite phase change energy storage material according to claim 14 or 15, wherein the thermal conductive material comprises graphene, carbon nanotubes, carbon nanowires, copper powder, silicon powder, micro-nano graphite powder, carbon powder At least one of the body.

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