CN115387573A - Novel graphite alkene electrical heating wood composite energy storage floor - Google Patents
Novel graphite alkene electrical heating wood composite energy storage floor Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
- E04F15/041—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members with a top layer of wood in combination with a lower layer of other material
- E04F15/042—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members with a top layer of wood in combination with a lower layer of other material the lower layer being of fibrous or chipped material, e.g. bonded with synthetic resins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
- F24D13/022—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements
- F24D13/024—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements in walls, floors, ceilings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/0002—Means for connecting central heating radiators to circulation pipes
- F24D19/0056—Supplies from the central heating system
- F24D19/0058—Supplies from the central heating system coming out the floor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/145—Carbon only, e.g. carbon black, graphite
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Central Heating Systems (AREA)
Abstract
The utility model provides a novel graphite alkene electrical heating wood composite energy storage floor, makes the user produce higher quality, safe life experience under the prerequisite that keeps traditional electrical heating floor, and low temperature heating and temperature regulation system make energy resource consumption further reduce simultaneously, provide a new thinking for green house life. The floor is of a three-layer structure, the base material layer is attached to the graphene heat dissipation layer, and the heat transfer efficiency of the graphene heat dissipation layer is improved through the fins; the time for heating the floor surface to the comfortable temperature of a human body and the time for cooling the floor are obtained through simulation and experiment on the whole floor, so that the floor heating is controlled only by a simple timer. Finally, the floor obtained through experimental comparison has good heat storage performance and certain practical value.
Description
Technical Field
The invention belongs to the field of solid wood composite floors, and particularly relates to a novel graphene electric heating solid wood composite energy storage floor.
Background
The solid wood composite floor is a tongue-and-groove floor which is made by taking a solid wood spliced plate or a solid wood veneer as a surface layer, taking solid wood as a core layer and taking the solid veneer as a bottom layer, and the name of a wood species of the floor is usually determined by taking a tree species of the surface layer. The composite floor is different from a so-called composite floor in the market, the solid wood composite floor is formed by alternately laminating different tree species of boards, the defect of one-way homogeneity of the solid wood floor is overcome, the dry shrinkage and wet swelling rate is low, the good dimensional stability is realized, and the natural wood grains and the comfortable foot feeling of the solid wood floor are kept. The solid wood composite floor has the advantages of enhanced stability and beautiful appearance, and is environment-friendly. Make the user produce better quality, safe, comfortable life experience under the prerequisite that keeps traditional electrical heating floor, low temperature heating and temperature regulation system make energy resource consumption further reduce simultaneously, provide a new thinking for green house life.
The solid wood composite electric heating floor is a new heating means, adopts a more efficient heat conduction mode and an energy-saving and intelligent feedback control system, and can be used as a main heat source for indoor heating. The existing common electric heating floor has the problems of low heat efficiency, high or low surface temperature, poor energy storage effect and the like, and meanwhile, the traditional electric heating floor has the difficulties that the temperature cannot be regulated autonomously or the cost is too high and the like.
Disclosure of Invention
The invention provides a novel graphene electric heating solid wood composite energy storage floor for solving the problems in the background technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a novel graphene electric heating solid wood composite energy storage floor comprises a floor surface layer, a base material layer and a floor bottom layer from top to bottom;
a groove with the depth of 2mm is processed on the lower surface of the base material layer, and an asbestos gauze heat-resistant layer is arranged in the groove;
the floor surface layer lower surface is opened there is the recess, and the substrate layer upper surface is opened flutedly, and two recesses cooperate and are equipped with graphite alkene heat dissipation layer.
Further, urea-formaldehyde resin gluing is adopted between substrate layer and the floor bottom layer, between floor surface layer and the substrate layer, between floor surface layer and the graphite alkene heat dissipation layer, between graphite alkene heat dissipation layer and the substrate layer.
Furthermore, the depth of the groove at the bottom of the floor surface layer is 2mm, and the height of the rib is 1mm.
Furthermore, the graphene heat dissipation layer is composed of an upper insulation layer, an upper graphene heat dissipation layer, an electrothermal film, a lower graphene heat dissipation layer and a lower insulation layer.
Further, the electric heating film is made of 0.250PET +0.050EVA +0.100PET material and is about 0.5mm thick.
Further, the lower end face of the electric heating film is attached to the upper end face of the lower graphene heat dissipation layer.
Furthermore, temperature sensor is not installed at the floor surface layer, when the heating time reaches the required time of critical temperature (28 ℃) after the power-on, control system makes the electric heat membrane power off, when the floor surface layer cools down to the required time of certain temperature (22 ℃), control system makes the electric heat membrane restart, after continuing to heat for a certain time, make the temperature get back to critical temperature again, the circulation is reciprocal, can realize that the floor surface layer is in between 22 ℃ and 28 ℃ all the time, keep the warm of floor surface all the time.
Compared with the prior art, the invention has the beneficial effects that:
1. utilize graphite alkene preparation electricity heating floor's heating film, realize low temperature heating, floor substrate has played the effect of energy storage simultaneously, gives the comfortable experience of user in the energy saving.
2. The heating time can be controlled by using a simple timer, the temperature can be automatically regulated, and the cost is low.
3. The heat-insulating asbestos meshes are utilized to prevent the loss of heat and promote the more efficient utilization of heat energy.
Drawings
Fig. 1 is a layered structure diagram of a graphene electrical heating solid wood composite floor;
fig. 2 is an overall structure diagram of a graphene electric heating floor;
fig. 3 is a diagram of a graphene electric heating floor control system;
fig. 4 is a temperature control system diagram of a graphene electric heating floor;
FIG. 5 is a view of the PCM floor structure;
FIG. 6 is a graph comparing the temperature change of a graphene electric heating floor with that of a common floor;
fig. 7 is a graph of the power-on temperature rise of the graphene electric heating floor;
FIG. 8 is a graph of power-off cooling curves of a graphene electric heating floor;
FIG. 9 is a schematic view of a floor heat transfer process;
FIG. 10 is a schematic structural view of each layer of a graphene electric heating solid wood composite floor;
the temperature control floor comprises a floor surface layer 1, an upper insulating layer 2, an upper graphene heat dissipation layer 3, an electric heating film 4, a lower graphene heat dissipation layer 5, a lower insulating layer 6, a base material layer 7, an asbestos gauze heat-resistant layer 8, a floor bottom layer 9, an alternating current power supply 10, a temperature control switch 11, a heating module 12, a temperature control resistor 13, a PCM floor surface layer 14, a PCM floor phase change material layer 15, a PCM floor base material layer 16, a PCM floor electric heating film 17, a PCM floor bottom layer 18, a common electric heating floor temperature change curve 19, a graphene electric heating floor temperature change curve 20, a time control switch II, an electric heating floor III, a time coordinate(s) IV and a temperature coordinate (DEG C).
Detailed Description
The technical solution of the present invention is further described below with reference to the drawings and the embodiments, but the present invention is not limited thereto, and modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit of the technical solution of the present invention, and the technical solution of the present invention is covered by the protection scope of the present invention.
The graphene electric heating solid wood composite floor designed by the invention is different in material selection and internal structure design compared with the prior art, and based on an innovative process and a better structural design, the problems of heat conduction efficiency, energy consumption and the like are solved, so that the defects of the traditional electric heating floor in performance are overcome, and the heat transfer efficiency of the electric heating floor is improved to a certain extent. The temperature contrast test data of the traditional electric heating floor and the solid wood composite graphene electric heating floor are analyzed, the temperature change rates of the two floors are tested on the premise of controlling variables, the influence of innovative materials and structures on the thermal efficiency of the graphene electric heating floor is discussed, and technical support is provided for improving the heat transfer performance of the graphene electric heating floor.
After graphite alkene electrical heating wood composite floor ohmic heating (to the electric heat membrane circular telegram wherein), the heat passes through electric heat membrane 4 and transmits to last graphite alkene heat dissipation layer 3 and lower graphite alkene heat dissipation layer 5, according to thermodynamics second law, the heat can flow to two upper and lower directions, and the heat of upwards transmitting passes through the graphite alkene fin and transmits to floor surface layer 1 on, again through thermal convection and thermal radiation conduction in the room air. Part of heat transferred downwards is stored in the base material layer 7 after being insulated by the asbestos gauze heat-insulating layer 8, and the energy storage effect is achieved. According to the research results of 'Dianjian, wang Cheng kang, yan Junxia, etc.. 2021, research and simulation of heat transfer characteristics of graphene modified phase-change polyurethane foam materials, packaging engineering, 42 (11): 87-95', the carbon crystal graphene used by the electrothermal film is a light material, has excellent heat dissipation performance, good oxidation resistance, no corrosion and low cost, and is generally used as a preferred material for heat conduction and heat dissipation, so that the composite graphene electric heating floor provided by the invention adopts the carbon crystal graphene film as a heat conduction material. Meanwhile, asbestos fiber is selected as the asbestos mesh heat-resistant layer 8 of the composite graphene electric heating floor, and the asbestos fiber has the heat conductivity coefficient of 0.104-0.260W/(m.k), has good heat-insulating property and high fire resistance, has the characteristics of high tensile strength, chemical resistance and thermal corrosion resistance, and good electric insulation property and heat-insulating property, is not the second choice for heat-insulating and insulating materials, and the characteristics exactly meet the performance requirements of the solid wood composite graphene electric heating floor related by the invention.
A model for establishing a graphene electric heating solid wood composite floor through three-dimensional design software Solidworks is shown in figure 2, a floor surface layer 1 and a graphene layer are in joggle joint, a base material layer 7 and a floor bottom layer 9 are connected together through glue joint, and an asbestos mesh heat-resisting layer 8 is embedded in a groove in the lower end surface of the base material layer 7.
As shown in fig. 2, the built model of the solid wood composite graphene electric heating floor sequentially comprises a solid wood floor surface layer 1, an upper insulating layer 2, an upper graphene heat dissipation layer 3, an electrothermal film 4, a lower graphene heat dissipation layer 5, a lower insulating layer 6, a base material layer 7, an asbestos mesh heat-resistant layer 8 and a floor bottom layer 9 from top to bottom, wherein a groove is formed above the graphene heat dissipation layer, and the groove position can be adjusted due to a processing mode, for example, if the processing is convenient, a groove can be formed in graphene and the insulating layer can be tightly attached to the graphene; the invention also can connect the thick insulating layer first and then open the small groove on the insulating layer, the purpose is to expand the area of the heat transfer surface, according to the heat conduction Fourier law, the heat transfer quantity Q is in direct proportion to the heat transfer area of the carbon crystal graphene heat dissipation plate, so the heat transfer quantity can be improved by using the method of increasing the heat transfer area.
The automatic temperature regulation control system of graphite alkene electrical heating floor is designed to realize the floor in during operation to heating temperature's self-regulation. The designed temperature control system mainly comprises a heat energy generation system, a heat energy conversion system, a heat energy transfer system, a heat dissipation system and other automatic control systems for ensuring the indoor temperature. The control system is realized in the process that after the power supply is switched on, the electric heating film heats, the required temperature is adjusted through the timer, and heat is transmitted to the solid wood floor surface layer through the graphene film. The control system is shown in fig. 3.
The electric heating media of the graphene electric heating solid wood composite floor board adopt metal carbon spar graphene in the graphene heat dissipation layer, carbon fibers and silver-plated copper wires in the electric heating film, the metal carbon spar graphene and the silver-plated copper wires are main heating bodies of the graphene electric heating solid wood composite floor board, and atomic molecules of carbon fiber ink vibrate and impact violently under the action of an electric field after the power is switched on, so that heat energy is generated, and the electric heating film transfers heat to the metal carbon crystal graphene in a heat conduction mode. Carbon spar ink alkene heating panel transmits the floor surface course with heat-conducting mode with the heat, and the heat energy that the electric heat membrane produced transmits wood composite floor surface course through metal carbon spar ink alkene uniformly, and after the surface temperature on graphite alkene heat dissipation layer and floor reached balance, the floor surface course will radiate with the temperature of invariant and release heat, transmits the heat for indoor air, the heat of transmission with the mode of radiation:
in the formula, C n Is the emissivity coefficient; f 1 Is the radiating surface area of the radiator. T is 1 、T 2 Respectively, the floor surface temperature and the indoor air temperature.
The air molecule obtains the heat and then carries out the heat convection with the indoor wall along with the molecule thermal motion, and the heat of heat convection is:
Q＝α(T w -T f )F
in the formula, Q is convection heat exchange quantity and the unit is W; alpha is the convective heat transfer coefficient; t is a unit of w ，T f tw is the average temperature of the wall and the fluid, respectively, in units; f is the convective heat transfer area in m 2 。
According to the thermal theory that hot air is light and cold air is heavy, the heat radiated by the graphene electric heating floor enables the indoor hot air to continuously rise, the cold air continuously falls, is supplemented and is gradually heated, the circulation process is repeated, the indoor temperature is continuously increased, and the heating purpose is finally achieved. Thus, the heat transfer process of the above-described floor is as shown in fig. 9.
According to the invention, the heating time of the floor reaching the critical temperature is obtained through heat transfer analysis of the floor model, so that the independent temperature regulation can be carried out by using a simple timer, the production cost of the electric heating floor is reduced by a low-cost regulation mode, and more comfortable intelligent home experience can be provided for users.
Example 1:
the method comprises the following steps: thickness and structure of each layer for establishing graphene electric heating floor
The graphene electric heating solid wood composite energy storage floor is of a three-layer structure, the two surfaces of the surface layer of the floor are sanded to set the thickness to be 4mm, and the cherry wood is laid along the grain by adopting a shaving process; the base material layer is made of common pine, the thickness of the base material layer is 8mm after fixed-thickness sanding, and transverse grains are laid; the bottom layer of the floor is a low-grade veneer, and the thickness is set to be 2mm by utilizing rotary-cut pine double-sided sanding. The heat insulation asbestos net with the thickness of 2mm is selected as an asbestos net heat resistance net, a groove with the depth of 2mm is processed on the lower surface of the base material layer, the 2mm asbestos net is added into the groove, and the lower surface of the base material layer is tightly attached to the upper surface of the floor bottom layer through a urea-formaldehyde resin adhesive. Add graphite alkene heat dissipation layer in floor surface course and substrate layer and carry out heat-conduction, 2mm deep fin type recess is opened to panel layer bottom, wherein the groove depth is 1mm, graphite alkene heat dissipation plate is according to the foundation of ribbing heat transfer, protruding fin part is processed out at the upper surface, in order to increase heat transfer area, inlay graphite alkene heat dissipation layer fin in the bottom recess of floor surface course, graphite alkene heat dissipation layer up end evenly scribbles the thick urea-formaldehyde resin adhesive of 0.5mm, adhesive here has both played the effect of bonding, insulated effect has been played again, graphite alkene heat dissipation layer lower surface bonds through urea-formaldehyde resin adhesive with substrate layer upper surface. The graphene heat dissipation layer is composed of an upper insulating layer, an upper graphene heat dissipation layer, an electric heating film, a lower graphene heat dissipation layer and a lower insulating layer, the electric heating film is 0.250PET +0.050EVA +0.100PET, and the actual thickness is about 0.5mm; the lower end face of the electric heating film is attached to the upper end face of the lower graphene heat dissipation layer, and a notch is not machined in the lower graphene heat dissipation layer; the lower end face of the lower graphene heat dissipation layer 6 is coated with a urea-formaldehyde resin adhesive with the fixed thickness of 0.5mm, and the effects of bonding and insulating layers are achieved. Whole graphite alkene heat dissipation layer installs additional in the recess of floor surface course and substrate layer, bonds with terminal surface groove under the top layer, and urea-formaldehyde resin veneer is passed through to floor surface course and substrate layer. The overall gauge is 910mm by 127mm by 18mm.
In summary, the structures of the layers of the graphene electrically heated solid wood composite floor are shown in fig. 10.
The layered structure of the graphene electric heating solid wood composite floor is shown in figure 1. In fig. 1, 1-9 are respectively a floor surface layer, an upper insulating layer, an upper graphene heat dissipation layer, an electrothermal film, a lower graphene heat dissipation layer, a lower insulating layer, a substrate layer, an asbestos gauze heat-resisting layer and a floor bottom layer.
Step two: temperature control system for establishing graphene electric heating solid wood composite floor
The temperature detection element is used for measuring the actual room temperature, the actual room temperature is converted into a voltage signal, the voltage signal and a preset voltage signal of the room temperature are added to the input end of the amplifier, the magnitude comparison is carried out, a difference signal is amplified by the amplifier and then drives the electrothermal film heating system to make corresponding action, when the detected room temperature is lower than the preset room temperature, the electrothermal film heating system starts to continuously supply heat, the heat is transferred to the low-temperature object carbon crystal graphene heating panel in a heat conduction mode, and the room temperature is further uniformly distributed; when the average room temperature reaches the preset temperature requirement, the difference signal is zero, the electric heating film heating system stops running, and the temperature of the room is controlled by intermittent opening and closing.
The temperature control system of the graphene electric heating floor is an existing typical closed-loop control system, as shown in fig. 4, the indoor temperature is adjusted through a timer, a power supply is turned on, an electric signal i (t) is input to the whole body, heat transfer of the system is controlled through a control equation, when the temperature rises to a set temperature, the system is powered off, and feedback adjustment k is achieved 1 (ii) a The temperature is reduced after power failure, when the specified time is reached, the system is powered on, heating is restarted, and feedback adjustment k is realized 2 (ii) a When the specified time is reached and the temperature of the floor surface is overhigh, the power supply circuit is cut off to ensure the safety, thereby avoiding hidden troubles. When the temperature is lower, the circulating supply of the temperature can be ensured, and the comfort and the energy conservation of the product are ensured.
Whether the heating system of electric heat membrane starts and is related to the predetermined temperature that the temperature controller of electric heat membrane set for, when indoor temperature is less than the temperature of establishing, the heating system of electric heat membrane then can start, according to the principle of air circulation convection current, cold air can be in the below, heat transmits to indoorly through graphite alkene heat dissipation layer and floor surface course after the electric heat membrane heating, to cold air circulation heating, make indoor temperature even, when reaching the predetermined time, the electric heat membrane temperature controller can self-closing heating system, the invariant of room temperature realizes adjusting through this control system.
According to the heating requirement in winter in the north and the health preservation concept of 'warm and cool top' in traditional Chinese medicine, the ground where people often stay is preferably 24-26 ℃ and the upper limit value of the temperature is 28 ℃. The ground where people stay for a short time is preferably 28-30 ℃ and the upper limit of the temperature is 32 ℃. The ground without people stay is preferably 35-40 ℃, and the upper limit value of the temperature is 42 ℃. The graphene composite heating bottom plate is usually applied to northern households, is a floor surface layer where people often stay, and takes the fact that the people often stay on the ground as a standard, the temperature of 32 ℃ is the heating temperature of an electrothermal film, the temperature of 28 ℃ is the upper limit heating temperature of the floor surface suitable for a human body, and the keeping temperature is 26 ℃. At the moment, the temperature sensed by the human body is approximately 18-22 ℃, the human body is completely warm and comfortable in cold winter, and the energy can be saved in terms of energy consumption, so that relatively economic heating temperature is realized.
The invention utilizes a simple timer to regulate and control the temperature, and obtains a temperature change curve as shown in figures 7 and 8 according to a thermal analysis simulation result. When the total thickness of the floor was 18mm, the time required for the surface of the floor to reach 22 ℃ by heating was 1637 seconds, the time required for the surface of the floor to reach 26 ℃ was 3342 seconds, and the time required for the surface of the floor to reach 28 ℃ was 6533 seconds, and for the convenience of setting a timer, the heating times were rounded up to minutes, and it was found that the time required for the surface of the floor to reach 22 ℃ was 27 minutes (1620 s), the time required for the surface of the floor to reach 26 ℃ was 56 minutes (3360 s), and the time required for the surface of the floor to reach 28 ℃ was 109 minutes (6540 s). Therefore, after the floor is started, the power can be cut off by heating for 109 minutes, and after the floor is cut off, the temperature is reduced to 22 ℃ after 1486 seconds (obtained by simulation of FIG. 8), and the whole time is rounded to 25 minutes (1500 s). When the floor is powered off for 25 minutes, the control system heats the floor again for 81 minutes, and the floor surface layer can be kept between 22 ℃ and 28 ℃ all the time by the circulation, so that the most comfortable experience is provided for users.
Step three: timer setting controls heating time
According to the above, when the floor is just powered on, the heating time is set to 109 minutes, the power is automatically cut off after 109 minutes, and when the surface temperature of the floor is lower than 22 ℃ after 25 minutes, the control system heats the floor again for 81 minutes, so that the floor surface layer can be always between 22 ℃ and 28 ℃ after the circulation.
Comparative example 1:
PCM electrical heating floor is selected to the contrast object, and thickness is 18mm, and top layer 14 is the two-sided sand light of eucalyptus, and thickness is 4mm, and compound PCM is selected to phase change material layer 15, and thickness is 3mm, and the substrate layer 16 comprises 8mm thick pine sawn timber, 17 low temperature heating of electric heat membrane, and bottom plate 18 adopts the pine to decide thick 2mm, and the electric heat membrane is 1mm. The basic structure is shown in fig. 5.
The specification and size of the laboratory are 8m multiplied by 6m multiplied by 3m, and a thermocouple temperature measuring instrument is adopted to measure the change condition of the temperature of the surface layer and the bottom layer of the floor in unit time. The indoor temperature is selected to be 16 +/-2 ℃ of the normal temperature after heating, the humidity is 20 +/-5%, and a humidifier is placed indoors to maintain small humidity fluctuation after heating. The common electric heating floor and the solid wood composite graphene electric heating heat dissipation plate floor are respectively assembled into a group by three, and two groups of the electric heating floor and the solid wood composite graphene electric heating heat dissipation plate floor are tiled at two sides of a laboratory with the front faces upward. 6 temperature acquisition points are uniformly arranged on the floor, and 3 temperature acquisition points are arranged in the indoor vertical direction at an interval of 0.5m. And (4) electrifying and heating for 1000s, wherein the surface temperature of the floor is gradually increased along with the electrifying and heating of the graphene electric heating floor, and the indoor and outdoor temperature difference is increased along with the gradual increase of the surface temperature of the floor. The operation is stopped for 0.5 hour, and the surface temperature of the floor is naturally cooled.
The temperature change of the surface layer of the common electric heating floor and the composite graphene electric heating floor after being electrified for 1000s is shown in figure 6. It can be seen from the figure that, the floor will continue to heat up for a period of time after the heating is stopped, the energy storage effect of the graphene electric heating floor 19 is better, and within 1 hour after the floor experiences the peak value, the common floor 20 is cooled down to below 20 ℃ quickly, while the cooling speed of the composite graphene electric heating floor is relatively slow, and the floor surface layer still keeps above 20 ℃ within 1 hour, so that it can be seen that the composite graphene electric heating floor has a better energy storage effect, and can save more energy sources on the premise of providing comfortable life.
Through the contrast experiment, verify that graphite alkene electrical heating wood laminate flooring has better heat transfer efficiency and energy storage effect, can provide a more safe, clean, comfortable, healthy heating mode for chilly winter in the north simultaneously.
Claims (7)
1. The utility model provides a novel graphite alkene electrical heating wood composite energy storage floor which characterized in that: the floor comprises a floor surface layer (1), a base material layer (7) and a floor bottom layer (9) from top to bottom;
a groove with the depth of 2mm is machined in the lower surface of the base material layer (7), and an asbestos gauze heat-resistant layer (8) is arranged in the groove;
floor surface layer (1) lower surface is opened flutedly, and substrate layer (7) upper surface is opened flutedly, and two recesses cooperate and are equipped with graphite alkene heat dissipation layer.
2. The novel graphene electric heating solid wood composite energy storage floor as claimed in claim 1, wherein: urea-formaldehyde resin gluing is adopted between substrate layer (7) and floor bottom (9), between floor surface course (1) and substrate layer (7), between floor surface course (1) and graphite alkene heat dissipation layer, between graphite alkene heat dissipation layer and substrate layer (7).
3. The novel graphene electric heating solid wood composite energy storage floor as claimed in claim 1, wherein: the depth of the groove at the bottom of the floor surface layer is 2mm, and the height of the rib is 1mm.
4. The novel graphene electric heating solid wood composite energy storage floor as claimed in claim 1, wherein: the graphene heat dissipation layer is composed of an upper insulation layer (2), an upper graphene heat dissipation layer (3), an electrothermal film (4), a lower graphene heat dissipation layer (5) and a lower insulation layer (6).
5. The novel graphene electric heating solid wood composite energy storage floor as claimed in claim 4, wherein: the electric heating film is made of 0.250PET +0.050EVA +0.100PET material and has the thickness of about 0.5mm.
6. The novel graphene electric heating solid wood composite energy storage floor as claimed in claim 4, wherein: the lower end face of the electric heating film is attached to the upper end face of the lower graphene heat dissipation layer.
7. The novel graphene electric heating solid wood composite energy storage floor as claimed in claim 1, wherein: temperature sensor is not installed at the floor surface course, when circular telegram postheating time reaches critical temperature (28 ℃) required time, control system makes the electric heat membrane outage, when the floor surface course cools off certain temperature (22 ℃) required time, control system makes the electric heat membrane restart, continue to heat after the certain time, make the temperature get back to critical temperature again, the circulation is reciprocal, can realize that the floor surface course is in between 22 ℃ all the time-28 ℃, keep the warmth on floor surface all the time.
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