Heating floor system and self-heating floor
By setting a slot and an embedded device on the side of the carrier plate of the self-heating floor system, the connection between the plug is stable, water vapor infiltration is avoided, and temperature independent adjustment is achieved through the installation slot and the temperature-sensitive color-distorting coating. The problem of insufficient adaptability of water vapor infiltration and temperature control in the prior art is solved, and the durability and flexibility of the floor are improved.
Patent Information
- Application Number
- CN202211689343.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-27
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2042-12-27
AI Technical Summary
The existing self-heating floors have problems with water vapor infiltration during use and lack adaptability to temperature control in different areas.
A heating floor system is designed, using a card slot to open on the side of the carrier plate, and an elastic sealing ring, a card insertion positioning device and a thermal expansion and tightening device are installed on the inner wall of the card slot to ensure the stability of the connection at the plug and avoid water vapor infiltration. At the same time, by setting up installation grooves and temperature-sensitive color-changing coatings in the bearing plate, the flexible arrangement of adjustable heating wires and independent temperature adjustment in different areas are achieved.
It effectively avoids water vapor infiltration, improves the durability of the floor, and realizes independent temperature adjustment in different areas, improving the flexibility and convenience of use.
Smart Images

Figure CN115854406B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heating floors, in particular to a heating floor system and a self-heating floor thereof. Background Art
[0002] In winter heating, floor heating is the main choice for those who want home comfort in cold winter areas. Floor heating is achieved by evenly heating the entire floor, using the heat storage of the floor itself and the law of heat radiation upward to conduct heat from bottom to top. In terms of heat medium, floor heating is generally divided into water floor heating and electric floor heating. Whether it is water floor heating or electric floor heating, you need to lay the heat medium first, and then lay the floor.
[0003] In the prior art, there is a self-heating floor and a self-heating floor system with a publication number of "CN108458398A", which comprises: a bottom plate and a top plate which are laminated and bonded, a heating cable coiled between the bottom plate and the top plate, and an even number of electrical connectors electrically connected to the heating cables; the electrical connector comprises a male terminal, a female terminal and a cable connecting the male terminal and the female terminal; a first receiving groove for at least partially accommodating the heating cable and a second receiving groove for at least partially accommodating the electrical connector are formed on the surface of the bottom plate facing the top plate, and first and second expansion recessed portions and second expansion recessed portions are respectively formed at both ends of the second receiving groove for at least partially accommodating the terminals at both ends of the electrical connector. The self-heating floor and the self-heating floor system realize modular production and assembly, improve installation efficiency, and can effectively avoid defects such as unstable quality, water vapor intrusion, and greater safety hazards caused by the disengagement of the male and female terminals due to force deformation during use.
[0004] However, there are still some obvious defects in its use: 1. The above-mentioned device realizes a parallel electrical connection relationship by plugging the male terminal and the female terminal in the jumper board into each other. However, this setting requires high accuracy of the plug-in structure. If there is a gap at the plug-in point, water vapor infiltration may still occur, which will not only damage the self-heating floor, but also cause safety hazards; 2. The above-mentioned device can only realize overall temperature regulation, but in actual use, different temperature control may be required for different areas. In this regard, the above-mentioned device lacks certain adaptability. Summary of the invention
[0005] The object of the present invention is to provide a heating floor system and a self-heating floor thereof to solve the problems raised in the above background technology.
[0006] To achieve the above object, the present invention provides the following technical solutions:
[0007] A heating floor system, comprising a bearing plate, a slot is provided on the side of the bearing plate, a main heating wire is embedded in the bearing plate, two ends of the main heating wire are respectively connected to a first conductive rod and a second conductive rod, the first conductive rod extends into the slot, an elastic sealing ring, a locking positioning device and a thermal expansion clamp device are sequentially provided on the inner wall of the slot from inside to outside, an insertion rod is fixedly sleeved on the outer side of the second conductive rod, a first slot is provided on the end of the insertion rod, and a second slot is provided on the side of the insertion rod;
[0008] A mounting groove is provided in the carrier plate, the mounting groove includes a plurality of interconnected transverse channels and longitudinal channels, and the mounting groove is connected to the main heating wire, a plurality of conductive clamping devices electrically connected to the main heating wire are arranged in the mounting groove, the mounting groove is used to accommodate an adjustable heating wire placed along any route, and the two ends of the adjustable heating wire are respectively arranged in the conductive clamping devices, a plurality of thermochromic coatings are independently arranged in the areas divided by the mounting groove, and the thermochromic coatings are all coated on the surface of the carrier plate.
[0009] Preferably, the embedding positioning device comprises a U-shaped frame, a movable plate is movably provided in the U-shaped frame, a first spring is connected between the movable plate and the inner top wall of the U-shaped frame, and a embedding block is fixedly provided on a side of the movable plate away from the first spring.
[0010] Preferably, a blocking block is fixedly provided on the inner wall of the opening end of the U-shaped frame.
[0011] Preferably, the thermal expansion clamp device comprises an elastic layer, and a second spring and thermal expansion particles are arranged between the elastic layer and the inner wall of the slot.
[0012] Preferably, an elastic isolation pad is provided between the elastic layer and the inner wall of the card slot, and the elastic isolation pad is provided between the second spring and the thermal expansion particles.
[0013] Preferably, the conductive clamping device comprises a conductive block, a top plate is fixedly provided on the conductive block, a third spring is connected to the bottom of the top plate, an elastic clamp is connected to the bottom of the third spring, and the elastic clamp is connected to the conductive block.
[0014] Preferably, the thermal expansion particles are iron-manganese-silicon memory alloys that expand and stretch at high temperatures and contract at low temperatures, and the thermochromic coating is thermochromic ink.
[0015] A self-heating floor comprises a surface decoration layer, a substrate plate and the above-mentioned heating floor system, wherein the bearing plate is arranged between the surface decoration layer and the substrate plate.
[0016] Preferably, a wear-resistant coating is provided on a side of the surface decoration layer away from the bearing plate.
[0017] Preferably, the wear-resistant coating is a wear-resistant paint layer containing aluminum oxide.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] 1. The present invention provides a card slot on the side of the bearing plate of the heating floor system, and the inner wall of the card slot is provided with an elastic sealing ring, a card-embedded positioning device and a heat-expanding clamp device in sequence from the inside to the outside, wherein after installation, the card-embedded block in the card-embedded positioning device can be just engaged in the second slot of the plug rod of the upper bearing plate to achieve stable limiting, and the heat-expanding clamp device can expand after heating, so that the two bearing plates can be closely fitted at the plug-in position, reducing the gap, thereby preventing the infiltration of water vapor, effectively protecting the heating system and the floor, and making them more durable;
[0020] 2. The present invention provides an installation groove in the carrier plate, which includes a plurality of interconnected transverse channels and longitudinal channels, and the installation groove is connected to the main heating wire. The installation groove is used to accommodate an adjustable heating wire placed along any route, so that the total length and position of the adjustable heating wire can be flexibly adjusted according to needs, and different temperature zones can be independently controlled. In addition, a plurality of thermochromic coatings are independently arranged in the areas divided by the installation groove. After the above-mentioned adjustable heating wire is installed, the temperature status of different areas of the carrier plate can be timely and intuitively understood through the thermochromic coatings at different positions, and then it can be determined whether to adopt the current wiring method or make other adjustments, which is more convenient to use.
[0021] The present invention provides a heating floor system and a self-heating floor thereof, which can ensure stable connection at the plug-in point during heating after installation to prevent water vapor from seeping in from gaps, and can also arrange different adjustable heating wires in different bearing plates to achieve independent temperature adjustment at different positions, and the real-time temperature status after wiring is more intuitive and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a cross-sectional schematic diagram of a carrier plate of the present invention in a first embodiment;
[0023] Figure 2 For the present invention Figure 1 A in the enlarged view;
[0024] Figure 3 It is a schematic diagram of the specific structure of the conductive clamping device of the present invention;
[0025] Figure 4 is a cross-sectional schematic diagram of a carrier plate of the present invention in a second embodiment;
[0026] Figure 5is a cross-sectional schematic diagram of a carrier plate of the present invention in a third embodiment;
[0027] Figure 6 It is a structural schematic diagram of the self-heating floor of the present invention.
[0028] In the figure: 1 bearing plate, 101 card slot, 2 main heating wire, 3 first conductive rod, 4 second conductive rod, 5 elastic sealing ring, 6 U-shaped frame, 7 elastic layer, 8 movable plate, 9 first spring, 10 card embedding block, 11 blocking block, 12 second spring, 13 thermal expansion particles, 14 elastic isolation pad, 15 plug rod, 151 first slot, 152 second slot, 16 installation slot, 17 conductive block, 18 top plate, 19 third spring, 20 elastic pressing piece, 21 adjustable heating wire, 22 temperature-sensitive color-changing coating, 23 surface decoration layer, 24 substrate plate, 25 wear-resistant coating. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] See also Figures 1 to 6 , the present invention provides a technical solution:
[0031] Embodiment 1:
[0032] A heating floor system includes a bearing plate 1, a card slot 101 is provided on the side of the bearing plate 1, a main heating wire 2 is embedded in the bearing plate 1, and the main heating wire 2 generates heat after being energized. The two ends of the main heating wire 2 are respectively connected to a first conductive rod 3 and a second conductive rod 4 to achieve electrical conduction. The first conductive rod 3 extends into the card slot 101, and the inner wall of the card slot 101 is sequentially provided with an elastic sealing ring 5, a card-embedded positioning device and a thermal expansion clamp device from the inside to the outside. After the two bearing plates 1 are spliced together, the elastic sealing ring 5 will wrap It covers the outside of another plug rod 15, and the elastic sealing ring 5 has a certain elasticity, so that there is no gap at the plug-in point, thereby preventing water vapor from penetrating, effectively protecting the internal main heating wire 2, and making the device more durable. The outer side of the second conductive rod 4 is fixedly sleeved with a plug rod 15, and a first slot 151 is opened at the end of the plug rod 15, and a second slot 152 is opened on the side of the plug rod 15. After assembly, the protruding part of the first conductive rod 3 will be inserted into the first slot 151 of the plug rod 15, thereby realizing electrical conduction and easy installation.
[0033] An installation groove 16 is opened in the supporting plate 1, and the installation groove 16 includes a plurality of interconnected transverse channels and longitudinal channels, and the installation groove 16 is connected to the main heating wire 2. A plurality of conductive clamping devices electrically connected to the main heating wire 2 are arranged in the installation groove 16. The installation groove 16 is used to accommodate an adjustable heating wire 21 placed along any route, and the two ends of the adjustable heating wire 21 are respectively arranged in the conductive clamping devices, thereby, the adjustable heating wire 21 can be connected to electricity, and then can generate heat after power is turned on. In this embodiment, if the main heating wire 2 is sufficient to generate sufficient heat, an adjustable heating wire 21 may not be provided separately.
[0034] Embodiment 2:
[0035] A heating floor system includes a bearing plate 1, a card slot 101 is provided on the side of the bearing plate 1, a main heating wire 2 is embedded in the bearing plate 1, and the main heating wire 2 generates heat after being energized. The two ends of the main heating wire 2 are respectively connected to a first conductive rod 3 and a second conductive rod 4 to achieve electrical conduction. The first conductive rod 3 extends into the card slot 101, and the inner wall of the card slot 101 is sequentially provided with an elastic sealing ring 5, a card-embedded positioning device and a thermal expansion clamp device from the inside to the outside. After the two bearing plates 1 are spliced together, the elastic sealing ring 5 will wrap It covers the outside of another plug rod 15, and the elastic sealing ring 5 has a certain elasticity, so that there is no gap at the plug-in point, thereby preventing water vapor from penetrating, effectively protecting the internal main heating wire 2, and making the device more durable. The outer side of the second conductive rod 4 is fixedly sleeved with a plug rod 15, and a first slot 151 is opened at the end of the plug rod 15, and a second slot 152 is opened on the side of the plug rod 15. After assembly, the protruding part of the first conductive rod 3 will be inserted into the first slot 151 of the plug rod 15, thereby realizing electrical conduction and easy installation.
[0036] A mounting groove 16 is provided in the carrier plate 1, and the mounting groove 16 includes a plurality of interconnected transverse channels and longitudinal channels, and the mounting groove 16 is connected to the main heating wire 2. A plurality of conductive clamping devices electrically connected to the main heating wire 2 are provided in the mounting groove 16, and the mounting groove 16 is used to accommodate an adjustable heating wire 21 placed along any route, and the two ends of the adjustable heating wire 21 are respectively provided in the conductive clamping devices, thereby, the adjustable heating wire 21 can be connected to electricity, and then can generate heat after being energized, and the specific installation route of the adjustable heating wire 21 can be flexibly adjusted as needed, and then in different carrier plates 1, adjustable heating wires 21 of different lengths and different positions can be installed to achieve precise control of different temperature zones, in this embodiment, the adjustable heating wire 21 is wired along the outermost circle channel of the mounting groove 16 in an inverted U shape, and cooperates with the main heating wire 2, and a plurality of thermochromic coatings 22 are independently provided in the areas divided by the mounting groove 16, and the thermochromic coatings 22 are all coated on The surface of the supporting plate 1, the thermochromic coating 22 can be a thermochromic ink, a thermochromic paint, etc., which is a microcapsule material that repeatedly changes color with the rise and fall of temperature. For example, the thermochromic coating 22 can adopt the WB-C1011 thermochromic ink produced by Shenzhen Aobo Security Anti-Counterfeiting Technology Co., Ltd. The thermochromic contains microcapsule color-changing particles with a particle size between 1 and 10UM, and has the characteristics changed by the capsules such as high temperature resistance and oxidation resistance. Existing patents, such as CN112980248B, etc., also propose a thermochromic liquid crystal microcapsule ink and a thermochromic coating. In view of the fact that the material is already very easy to obtain on the market, it will not be repeated here. After the thermochromic coating 22 is set, the color reaction of multiple thermochromic coatings 22 at different positions can be used to quickly and intuitively know the current temperature distribution of the supporting plate 1, so as to judge whether to adopt the current wiring method or make other adjustments, which is more convenient to use.
[0037] Embodiment three:
[0038] This embodiment is similar to the second embodiment, with the only difference being that in this embodiment, the adjustable heating wire 21 is arranged along a convex-shaped route, which is different from the heating position in the second embodiment. Thus, the thermochromic coating 22 at different positions may show different changes. After arrangement, power can be turned on immediately, and then the color change of the thermochromic coating 22 can be used to determine whether the current arrangement meets the expected requirements. If not, it can be replaced and adjusted in time, making the operation more intuitive and simple.
[0039] Embodiment 4:
[0040] Based on the above-mentioned embodiment one, embodiment two or embodiment three, this embodiment further discloses and defines the specific structure of the embedded positioning device. Specifically: the embedded positioning device includes a U-shaped frame 6, in which a movable plate 8 is movably provided. The movable plate 8 can move along the inner wall of the U-shaped frame 6. A first spring 9 is connected between the movable plate 8 and the inner top wall of the U-shaped frame 6. The first spring 9 has good telescopic elasticity. A embedding block 10 is fixedly provided on the side of the movable plate 8 away from the first spring 9. A blocking block 11 is fixedly provided on the inner wall of the open end of the U-shaped frame 6. The setting of the blocking block 11 can prevent the movable plate 8 from detaching from the U-shaped frame 6 when moving.
[0041] Embodiment five:
[0042] Based on the above-mentioned embodiment 1, embodiment 2 or embodiment 3, this embodiment further discloses and defines the specific structure of the thermal expansion clamp device. Specifically: the thermal expansion clamp device includes an elastic layer 7, and a second spring 12 and thermal expansion particles 13 are arranged between the elastic layer 7 and the inner wall of the slot 101. The second spring 12 has good elasticity, so that the elastic layer 7 always has a tendency to be pushed outward, so as to better fit the outer surface of the plug rod 15. The thermal expansion particles 13 are substances that expand when the temperature is high and shrink to the initial state when the temperature is lowered. For example, they can be memory metals that have been extensively studied and are relatively widely used, such as iron-manganese-silicon memory alloys. An elastic isolation pad 14 is arranged between the elastic layer 7 and the inner wall of the slot 101, and the elastic isolation pad 14 is arranged between the second spring 12 and the thermal expansion particles 13. The arrangement of the elastic isolation pad 14 can prevent the thermal expansion particles 13 from being stuck in the second spring 12, so that each structure can be used normally.
[0043] Embodiment six:
[0044] Based on the above-mentioned embodiment one, embodiment two or embodiment three, this embodiment further discloses and defines the specific structure of the conductive clamping device. Specifically: the conductive clamping device includes a conductive block 17, a top plate 18 is fixedly arranged on the conductive block 17, the bottom of the top plate 18 is connected to a third spring 19, the bottom of the third spring 19 is connected to an elastic clamping piece 20, and the elastic clamping piece 20 is connected to the conductive block 17. The elastic clamping piece 20 is elastic, so that the adjustable heating wire 21 can be tightly crimped between the elastic clamping piece 20 and the conductive block 17, so as to achieve conductive connection.
[0045] A self-heating floor comprises a surface decoration layer 23, a substrate plate 24 and the above-mentioned heating floor system, wherein a supporting plate 1 is arranged between the surface decoration layer 23 and the substrate plate 24, and a wear-resistant coating 25 is arranged on the side of the surface decoration layer 23 away from the supporting plate 1, wherein the wear-resistant coating 25 is a wear-resistant paint layer containing aluminum oxide, so that the surface of the floor is not easily worn and is more durable.
[0046] Working principle:
[0047] When in use, each carrier plate 1 can be independently configured. Specifically, each carrier plate 1 is fixedly embedded with a main heating wire 2, which will generate heat after being energized. In addition, a mounting groove 16 is provided in the carrier plate 1. The mounting groove 16 includes a plurality of interconnected transverse channels and longitudinal channels, and the mounting groove 16 is connected to the main heating wire 2. A plurality of conductive clamping devices electrically connected to the main heating wire 2 are provided in the mounting groove 16. The mounting groove 16 is used to accommodate an adjustable heating wire 21 placed along any route, and both ends of the adjustable heating wire 21 are respectively arranged in the conductive clamping devices, thereby enabling the adjustable heating wire 21 to be connected to electricity and generate heat after being energized. The specific installation route of the adjustable heating wire 21 can be flexibly adjusted as needed. Furthermore, in different supporting boards 1, adjustable heating wires 21 of different lengths and different positions can be installed to achieve precise control of different temperature zones. For example, the adjustable heating wire 21 can be arranged in an inverted U shape or a convex shape, or other different bending routes can be arranged. Thus, the specific position and total length of the adjustable heating wire 21 can be flexibly adjusted, thereby adjusting the heat generation and total heat generation at different positions. A plurality of thermochromic coatings 22 are independently arranged in the area divided by the installation groove 16. After the thermochromic coating 22 is arranged, the color reaction of the plurality of thermochromic coatings 22 at different positions can be used to quickly and intuitively know the temperature distribution of the current supporting board 1, thereby determining whether to adopt the current wiring method or make other adjustments, which is more convenient to use.
[0048] After each carrier plate 1 is independently adjusted, the carrier plates 1 can be spliced in a predetermined order. Specifically, the plug rod 15 of the previous carrier plate 1 is inserted into the card slot 101 of the next carrier plate, so that the first slot 151 of the plug rod 15 is aligned with the first conductive rod 3, so as to achieve electrical connection. After splicing, since the inner wall of the card slot 101 is sequentially provided with an elastic sealing ring 5, a card-embedded positioning device and a thermal expansion clamp device from the inside to the outside, at this time, the elastic sealing ring 5 will cover the outer side of another plug rod 15, and the elastic sealing ring 5 has a certain elasticity, so that the plug-in position is not There is a gap to prevent water vapor from penetrating. The embedding block 10 in the embedding positioning device will be embedded in the second slot 152 of the plug rod 15. The second spring 12 in the thermal expansion clamp device has a tendency to be pushed outward, and the thermal expansion particles 13 will expand after being heated and will also push the elastic layer 7 outward. As a result, the elastic layer 7 and the plug rod 15 are made tighter, further preventing water vapor from penetrating, making it more durable. In addition, for the supporting plate 1 in the edge position, the card slot 101 may no longer be provided, or the second conductive rod 4 and the plug rod 15 may no longer be provided, thereby completing the overall assembly.
[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A heating floor system, comprising a bearing plate (1), characterized in that: A slot (101) is provided on the side of the carrier plate (1), a main heating wire (2) is embedded in the interior of the carrier plate (1), two ends of the main heating wire (2) are respectively connected to a first conductive rod (3) and a second conductive rod (4), the first conductive rod (3) extends into the slot (101), an elastic sealing ring (5), a snap-fitting positioning device and a heat expansion clamp device are sequentially provided on the inner wall of the slot (101) from the inside to the outside, an insert rod (15) is fixedly sleeved on the outside of the second conductive rod (4), a first slot (151) is provided at the end of the insert rod (15), and a second slot (152) is provided on the side of the insert rod (15); The thermal expansion clamp device comprises an elastic layer (7), and a second spring (12) and thermal expansion particles (13) are arranged between the elastic layer (7) and the inner wall of the slot (101); The carrier plate (1) is provided with a mounting groove (16), the mounting groove (16) comprising a plurality of interconnected transverse channels and longitudinal channels, and the mounting groove (16) is connected to the main heating wire (2), a plurality of conductive clamping devices electrically connected to the main heating wire (2) are arranged in the mounting groove (16), the mounting groove (16) is used to accommodate an adjustable heating wire (21) placed along any route, and both ends of the adjustable heating wire (21) are respectively arranged in the conductive clamping devices, a plurality of thermochromic coatings (22) are independently arranged in the areas divided by the mounting groove (16), and the thermochromic coatings (22) are all coated on the surface of the carrier plate (1); The temperature states of different areas of the carrier plate (1) can be timely and intuitively understood through the thermochromic coatings (22) at different positions, so as to determine whether to adopt the current wiring method or make other adjustments.
2. A heating floor system according to claim 1, characterized in that: The locking and positioning device comprises a U-shaped frame (6), a movable plate (8) is movably arranged in the U-shaped frame (6), a first spring (9) is connected between the movable plate (8) and the inner top wall of the U-shaped frame (6), and a locking block (10) is fixedly arranged on a side of the movable plate (8) away from the first spring (9).
3. A heating floor system according to claim 2, characterized in that: A blocking block (11) is fixedly arranged on the inner wall of the opening end of the U-shaped frame (6).
4. A heating floor system according to claim 1, characterized in that: An elastic isolation pad (14) is provided between the elastic layer (7) and the inner wall of the slot (101), and the elastic isolation pad (14) is provided between the second spring (12) and the thermal expansion particles (13).
5. The heating floor system according to claim 1, characterized in that: The conductive clamping device comprises a conductive block (17), a top plate (18) is fixedly arranged on the conductive block (17), a third spring (19) is connected to the bottom of the top plate (18), an elastic clamping piece (20) is connected to the bottom of the third spring (19), and the elastic clamping piece (20) is connected to the conductive block (17).
6. A heating floor system according to claim 1, characterized in that: The thermal expansion particles (13) are iron-manganese-silicon memory alloys that expand and stretch at high temperatures and contract at low temperatures, and the thermochromic coating (22) is thermochromic ink.
7. A self-heating floor, characterized in that: The heating floor system comprises a surface decoration layer (23), a substrate plate (24), and the heating floor system according to any one of claims 1 to 6, wherein the bearing plate (1) is arranged between the surface decoration layer (23) and the substrate plate (24).
8. The self-heating floor according to claim 7, characterized in that: A wear-resistant coating (25) is provided on the side of the surface decoration layer (23) away from the bearing plate (1).
9. The self-heating floor according to claim 8, characterized in that: The wear-resistant coating (25) is a wear-resistant paint layer containing aluminum oxide.
Citation Information
Patent Citations
Self-heating floor and self-heating floor system thereof
CN108458398A
A thermochromic liquid crystal microcapsule ink and thermochromic coating
CN112980248B
Electrically-heated ceramic tile with binding posts
CN108532870A
Graphite alkene heating floor heating structure
CN207729698U