Prefabricated dry type floor heating plate with capillary network radiation surface

Abstract

The utility model discloses a prefabricated dry type floor heating plate with capillary network radiation surface, which comprises: a heat preservation base plate, a capillary mechanism and a heat preservation cover plate. The top of the heat preservation base plate is provided with a first accommodating groove; the capillary mechanism is arranged in the first accommodating groove, and the capillary mechanism comprises a water inlet pipe, a water outlet pipe and a plurality of capillary tubes; the water inlet pipe and the water outlet pipe are arranged in parallel, the plurality of capillary tubes are arranged between the water inlet pipe and the water outlet pipe, and the two ends of each capillary tube are respectively connected to the water inlet pipe and the water outlet pipe; the bottom of the heat preservation cover plate is provided with a second accommodating groove, the heat preservation cover plate is detachably covered above the heat preservation base plate; the first accommodating groove and the second accommodating groove are matched to jointly form a closed cavity with the heat preservation base plate and the heat preservation cover plate to accommodate the capillary mechanism. The overall structure design of the floor heating plate is optimized, and the heat preservation performance is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a prefabricated dry floor heating panel with a capillary network radiant surface. Background Technology

[0002] Capillary radiant heating systems, with their advantages of uniform temperature distribution, no draft, and high thermal comfort, have become an important indoor environmental control technology in modern high-quality buildings. Precast dry underfloor heating panels, as a key component of this system, are manufactured in-house by integrating the capillary network, insulation layer, and structural panels. This enables modular, dry installation of the underfloor heating system, effectively solving problems such as long construction cycles, reduced floor height, and difficulty in controlling on-site quality associated with traditional wet backfilling methods. With advantages such as convenient installation, energy efficiency, environmental friendliness, and compatibility with prefabricated buildings, they are widely used in various building scenarios, including residential, office, and medical facilities.

[0003] However, most mainstream products currently employ a capillary network laid on the insulation substrate, followed by an upper panel that serves as the structural load-bearing and surface leveling layer. The upper panel is typically made of non-insulating materials, and its thermal conductivity is much higher than that of the lower insulation board, thus reducing the insulation capacity of the underfloor heating board. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a prefabricated dry floor heating board with a capillary network radiant surface, which aims to effectively improve its thermal insulation performance by optimizing the overall structural design of the floor heating board.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A prefabricated dry underfloor heating panel with a capillary network radiant surface, comprising:

[0007] A thermal insulation substrate, wherein the top of the thermal insulation substrate has a first receiving groove;

[0008] A capillary mechanism is provided in the first receiving groove. The capillary mechanism includes an inlet pipe, an outlet pipe, and multiple capillary tubes. The inlet pipe and the outlet pipe are arranged in parallel. The multiple capillary tubes are arranged between the inlet pipe and the outlet pipe. The two ends of each capillary tube are respectively connected to the inlet pipe and the outlet pipe.

[0009] The heat-insulating cover has a second receiving groove at its bottom and is detachably fitted over the heat-insulating substrate. The first receiving groove and the second receiving groove cooperate to form a closed cavity between the heat-insulating substrate and the heat-insulating cover to accommodate the capillary mechanism.

[0010] Furthermore, the insulation substrate is provided with a first interlocking structure, and the insulation cover is provided with a second interlocking structure, the first interlocking structure and the second interlocking structure being able to cooperate with each other.

[0011] Furthermore, one of the first interlocking structure and the second interlocking structure consists of multiple interlocking protrusions, and the other consists of multiple interlocking grooves.

[0012] Furthermore, the first interlocking structure includes multiple interlocking grooves and multiple interlocking protrusions, and the second interlocking structure includes multiple interlocking grooves and multiple interlocking protrusions. The multiple interlocking grooves on the insulation substrate and the multiple interlocking protrusions on the insulation cover plate are correspondingly engaged, and the multiple interlocking protrusions on the insulation substrate and the multiple interlocking grooves on the insulation cover plate are correspondingly engaged.

[0013] Furthermore, the plurality of interlocking grooves provided on the insulation substrate and the plurality of interlocking protrusions provided on the insulation cover are distributed alternately along the edge of the insulation substrate; the plurality of interlocking grooves provided on the insulation cover and the plurality of interlocking protrusions provided on the insulation substrate are distributed alternately along the edge of the insulation cover.

[0014] Furthermore, the interlocking protrusions on the insulation substrate are in the shape of an inverted trapezoid, and the interlocking grooves on the insulation substrate are in the shape of a trapezoid; the interlocking protrusions on the insulation cover are in the shape of a trapezoid, and the interlocking grooves on the insulation cover are in the shape of an inverted trapezoid.

[0015] Furthermore, the wide bottom edge of the interlocking protrusion is provided with a first engagement rounded corner, and the narrow bottom edge of the interlocking groove is provided with a second engagement rounded corner that mates with the corresponding first engagement rounded corner.

[0016] Furthermore, the interlocking protrusion is provided with a space compensation groove, which extends along a direction perpendicular to the extension of the first interlocking structure and penetrates the opposite sides of the interlocking protrusion, so that the opposite sides of the interlocking protrusion located in the space compensation groove can approach each other to avoid the corresponding interlocking groove.

[0017] Furthermore, the interlocking groove is provided with a strength compensation protrusion, which is used to fit into the corresponding space compensation groove.

[0018] Furthermore, the capillary mechanism also includes at least one limiting block, the limiting block having multiple limiting holes, and multiple capillary tubes respectively passing through the limiting holes.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The insulation substrate has a first receiving groove at its top, and the insulation cover has a second receiving groove at its bottom. The first and second receiving grooves cooperate to form a closed cavity that accommodates the capillary mechanism. Therefore, the heat generated by the capillary mechanism during operation is confined within the closed cavity and cannot be dissipated to the building floor or adjacent structural layers through downward or lateral conduction. The insulation substrate acts as a bottom-layer thermal insulation barrier, effectively blocking the downward path of heat transfer; while the insulation cover acts as an upper heat reflector and insulation layer, guiding heat to concentrate and radiate upwards, achieving efficient heat confinement and unidirectional heat release. In conventional underfloor heating structures, some heat is lost downwards through the concrete filling layer, reducing thermal efficiency and potentially affecting the temperature control environment of the lower space. This design, by encapsulating the capillary mechanism within a closed cavity formed by the insulation material, concentrates most of the heat for upward radiation, significantly improving the overall thermal resistance performance of the underfloor heating system. In addition, this structure not only reduces heat loss in the vertical direction, but also effectively reduces lateral heat loss by diffusing heat outward along the sides of the plate in the horizontal direction, thus creating a comprehensive and seamless thermal protection barrier.

[0021] 2. The capillary mechanism includes an inlet pipe, an outlet pipe, and multiple capillary tubes. These capillary tubes are positioned between the inlet and outlet pipes, with each capillary tube connected to both ends of the inlet and outlet pipes respectively. This simulates the distribution pattern of a biological capillary system, constructing a dense, uniform, and low-flow-resistance high-efficiency heat exchange network. When hot water flows in through the inlet pipe, it is distributed evenly across the entire underfloor heating panel area via parallel flow through multiple capillary tubes. Heat continuously radiates upwards through the insulation cover during the flow. The low-temperature return water, after heat exchange, is then discharged uniformly through the outlet pipe, forming a complete circulation path. Due to the large number and dense distribution of capillary tubes, the heat medium achieves a highly uniform flow distribution across the entire panel surface, avoiding problems such as uneven heating or localized overheating caused by large pipe spacing or uneven layout in traditional underfloor heating systems. This significantly improves the uniformity and stability of the underfloor heating system's thermal response. The dense capillary network not only increases the heating area, making the heat output per unit area more uniform, but also, due to the small diameter of the capillary tubes and the low system heat capacity, it has a faster start-up speed and higher temperature regulation sensitivity, enabling it to quickly respond to changes in room temperature and achieve a dual optimization of precise temperature control and comfort and energy saving. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a prefabricated dry underfloor heating panel with a capillary network radiant surface according to the present invention.

[0023] Figure 2 for Figure 1 A partial unfolded diagram;

[0024] Figure 3 for Figure 2 Rear view diagram.

[0025] In the figure: 1. Insulation substrate; 11. First receiving groove; 12. First interlocking structure; 2. Capillary mechanism; 21. Water inlet pipe; 22. Water outlet pipe; 23. Capillary tube; 24. Limiting block; 3. Insulation cover plate; 31. Second receiving groove; 32. Second interlocking structure; 4. Interlocking protrusion; 41. Space compensation groove; 5. Interlocking groove; 51. Strength compensation protrusion. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] See Figures 1-3 A preferred embodiment of the present invention provides a prefabricated dry underfloor heating panel with a radiant surface covered by capillary tubes 23, comprising: an insulation substrate 1, a capillary mechanism 2, and an insulation cover 3. The top of the insulation substrate 1 has a first receiving groove 11; the capillary mechanism 2 is disposed in the first receiving groove 11, and the capillary mechanism 2 includes an inlet pipe 21, an outlet pipe 22, and multiple capillary tubes 23. The inlet pipe 21 and the outlet pipe 22 are arranged in parallel, and the multiple capillary tubes 23 are disposed between the inlet pipe 21 and the outlet pipe 22, with both ends of each capillary tube 23 connected to the inlet pipe 21 and the outlet pipe 22, respectively; the bottom of the insulation cover 3 has a second receiving groove 31, and the insulation cover 3 is detachably fitted over the insulation substrate 1; the first receiving groove 11 and the second receiving groove 31 cooperate to form a closed cavity between the insulation substrate 1 and the insulation cover 3 to accommodate the capillary mechanism 2.

[0030] Before installing the prefabricated dry underfloor heating panels, the building's subfloor must be cleaned and leveled to ensure there are no obvious protrusions, debris, or standing water, thus guaranteeing the flatness of the underfloor heating panels and efficient heat transfer. Then, the insulation substrate 1 with the first receiving groove 11 is laid on the subfloor according to the designed arrangement. Adjacent underfloor heating panels can be tightly connected through a pre-designed splicing structure to reduce thermal bridging. Next, the capillary mechanism 2 is embedded in the first receiving groove 11 of the insulation substrate 1. During installation, ensure the accurate positioning of the inlet pipe 21 and outlet pipe 22 interfaces and their reliable connection to the regional water distribution and collection system to prevent leakage. Then, the insulation cover plate 3 is placed over the insulation substrate 1, forming a closed cavity that completely encloses the capillary mechanism 2. During system activation, hot water at a suitable temperature is supplied to the inlet pipe 21 through the distributor. The hot water flows through the inlet pipe 21 into each capillary tube 23 and then returns to the collector through the outlet pipe 22, forming a closed loop. Heat is transferred through the capillary tube 23 to the surface of the insulation cover plate 3, and then dissipated into the room by radiation. The insulation base plate 1 prevents heat loss downwards, so that the heat is mainly concentrated in the upper space, achieving uniform heating.

[0031] The insulation substrate 1 has a first receiving groove 11 at its top, and the insulation cover plate 3 has a second receiving groove 31 at its bottom. The first receiving groove 11 and the second receiving groove 31 cooperate to form a closed cavity to accommodate the capillary mechanism 2. Therefore, the heat generated by the capillary mechanism 2 during operation is confined within the closed cavity and cannot be dissipated to the building floor or adjacent structural layers through downward or lateral conduction. The insulation substrate 1, as the bottom thermal insulation barrier, effectively blocks the downward path of heat transfer; while the insulation cover plate 3, as the upper heat reflector and insulation layer, guides the heat to concentrate and radiate upwards, achieving efficient heat confinement and unidirectional heat release. In conventional underfloor heating structures, some heat is dissipated downwards through the concrete filling layer, not only reducing thermal efficiency but also potentially affecting the temperature control environment of the lower space. This design, by encapsulating the capillary mechanism 2 within a closed cavity formed by the insulation material, concentrates most of the heat for upward radiation, significantly improving the overall thermal resistance performance of the underfloor heating system. Furthermore, this structure not only reduces heat loss in the vertical direction but also effectively reduces lateral heat loss by diffusing heat outwards along the sides of the panel, thus creating a comprehensive, all-around thermal protection barrier. The capillary mechanism 2 includes an inlet pipe 21, an outlet pipe 22, and multiple capillary tubes 23. These capillary tubes 23 are positioned between the inlet pipe 21 and the outlet pipe 22, with each capillary tube 23 connected to both ends of the inlet pipe 21 and the outlet pipe 22. This simulates the distribution pattern of a biological capillary system, constructing a dense, uniform, low-flow-resistance, and highly efficient heat exchange network. When hot water flows in from the inlet pipe 21, it is distributed evenly throughout the entire floor heating panel coverage area via the parallel flow of multiple capillary tubes 23. Heat continuously radiates upwards through the insulation cover 3 during the flow process. The low-temperature return water, after heat exchange, is then discharged uniformly through the outlet pipe 22, forming a complete circulation path. Due to the large number and dense distribution of capillary tubes 23, the heat medium achieves a highly uniform flow distribution throughout the entire panel, avoiding problems such as uneven heating or localized overheating caused by large pipe spacing or uneven layout in traditional underfloor heating systems. This significantly improves the uniformity and stability of the underfloor heating system's thermal response. The dense distribution not only increases the heating area, making the heat output per unit area more consistent, but also, due to the small diameter of the capillary tubes 23 and the low system heat capacity, it has a faster start-up speed and higher temperature regulation sensitivity. It can quickly respond to changes in room temperature, achieving a dual optimization of precise temperature control and comfort / energy saving.

[0032] Preferably, in this embodiment, the insulation base plate 1 is provided with a first interlocking structure 12, and the insulation cover plate 3 is provided with a second interlocking structure 32. The first interlocking structure 12 and the second interlocking structure 32 can cooperate with each other. The interlocking structure can be in the form of tongue and groove, tenon and mortise, snap-fit, or trapezoidal interlocking, and is integrally formed along the circumferential edge of the insulation base plate 1 and the insulation cover plate 3. This design significantly improves the splicing accuracy and structural stability of the underfloor heating panels during installation. Adjacent underfloor heating panels can achieve rapid alignment and self-limiting assembly through the interlocking structure, avoiding problems such as misalignment, offset, or excessive gaps that are prone to occur in traditional flat-joint splicing, ensuring that the panels fit tightly and are flatly joined. At the same time, the interlocking structure forms a continuous physical interlocking interface at the joint, enhancing the overall structure's shear resistance and trampling resistance, preventing the panels from loosening or sinking due to load during use. Its function is to effectively block thermal bridge paths and improve overall insulation performance and heating efficiency. When the floor heating panels are not tightly joined, gaps between the panels can create localized low-thermal-resistance channels, allowing heat to escape laterally. This not only wastes energy but can also lead to uneven floor temperature distribution, creating cold seams or condensation risks. This design, through the tight cooperation of the first and second interlocking structures 32, extends the path of lateral heat conduction at the panel joints and reduces air convection space, significantly reducing the thermal bridging effect in the joint area and ensuring the integrity of the continuous and uniform insulation layer throughout the entire floor system. Furthermore, the interlocking structure enhances the sealing of the joints, effectively preventing moisture, dust, or construction debris from entering the panel interior, protecting the internal structure from contamination or blockage, and ensuring long-term stable system operation.

[0033] Preferably, in this embodiment, one of the first interlocking structure 12 and the second interlocking structure 32 consists of multiple interlocking protrusions 4, and the other consists of multiple interlocking grooves 5. The interlocking protrusions 4 are typically trapezoidal, semi-circular, or rectangular cross-section protrusions, while the interlocking grooves 5 have corresponding contour shapes and sizes, ensuring a tight fit during assembly. Through this complementary convex-concave fit, adjacent floor heating panels can achieve rapid guidance and self-alignment during splicing. During installation, the operator only needs to align the protrusion of one floor heating panel with the groove of another and gently push to complete the connection, without repeated adjustments, significantly improving construction efficiency and splicing accuracy. Especially in large-area laying operations, this design effectively avoids problems such as misalignment, displacement, or uneven gaps caused by human error, achieving efficient assembly while considering both construction convenience and long-term structural stability. The interlocking protrusions 4 distributed at multiple points form a continuous mechanical interlocking interface with the grooves, which enhances the shear resistance, pull resistance and trampling resistance between the boards, and prevents loosening, warping or gap widening caused by people walking, furniture moving or thermal expansion and contraction during use; the convex and concave structure forms a tortuous heat flow path at the joint, further inhibiting heat conduction through the board seams, strengthening the ability to block the thermal bridge effect, and ensuring the continuity and heating efficiency of the insulation system.

[0034] Preferably, in this embodiment, the first interlocking structure 12 includes multiple interlocking grooves 5 and multiple interlocking protrusions 4, and the second interlocking structure 32 includes multiple interlocking grooves 5 and multiple interlocking protrusions 4. The multiple interlocking grooves 5 on the insulation substrate 1 correspond one-to-one with the multiple interlocking protrusions 4 on the insulation cover plate 3, and the multiple interlocking protrusions 4 on the insulation substrate 1 correspond one-to-one with the multiple interlocking grooves 5 on the insulation cover plate 3. This structure significantly increases the number of effective connection points and contact area by simultaneously setting interlocking combinations at the mating edges of adjacent plates. Compared to traditional structures with a single-sided convex or concave side, this double-sided complementary, staggered interlocking design multiplies the mechanical interlocking force at the splicing interface, greatly enhancing the bonding strength between plates and the overall structural rigidity. When subjected to vertical loads or horizontal shear forces, the stress is evenly distributed to multiple interlocking units, avoiding damage or deformation caused by localized concentrated stress. Its function lies not only in improving the structural stability after installation, but also in optimizing the stress distribution at the edges of the panels. The multi-point interlocking structure forms a gear-like mechanical transmission path, allowing external forces to be smoothly transmitted along the joints, reducing stress concentration and fatigue damage. This effectively prevents problems such as cracking, edge chipping, or loosening of joints during long-term use, thus significantly extending the service life and durability of the underfloor heating panels. Furthermore, this two-way interlocking design further enhances the sealing performance at the joints, minimizing gaps and effectively blocking airflow and moisture penetration, preventing cold bridging, condensation, or dust accumulation caused by gaps. Simultaneously, the high-precision convex-concave fit ensures the flatness and aesthetics of the floor after installation, providing a solid and uniform base support for the subsequent finishing layer installation.

[0035] Preferably, in this embodiment, the plurality of interlocking grooves 5 provided on the insulation substrate 1 and the plurality of interlocking protrusions 4 provided on the insulation cover plate 3 are sequentially and alternately distributed along the edge of the insulation substrate 1; the plurality of interlocking grooves 5 provided on the insulation cover plate 3 and the plurality of interlocking protrusions 4 provided on the insulation substrate 1 are sequentially and alternately distributed along the edge of the insulation cover plate 3. This design achieves a more uniform pressure dispersion mechanism. When an external load is applied to the surface of the floor heating board, the stress is transmitted to the splicing edge through the insulation cover plate 3 and is jointly borne by the staggered interlocking protrusions 4 and interlocking grooves 5. Since the protrusions and grooves are equidistantly and alternately arranged on the circumferential edge, the stress distribution is highly uniform, avoiding the local stress concentration phenomenon that is prone to occur in traditional centralized or single-sided connection structures, effectively preventing material crushing, edge cracking or deformation and warping caused by local overload, and significantly improving the mechanical stability and long-term durability of the splicing area. Uniform pressure distribution ensures coordinated stress distribution across the entire joint area, reducing the risk of localized deformation and guaranteeing that the underfloor heating panels maintain excellent overall flatness throughout long-term use. This is crucial for safe internal operation: warping of the panels or misalignment of the joints could lead to deformation of the capillary tubes 23 under pressure, loosening of the interfaces, or even rupture, affecting water circulation and heat exchange performance. This interlocking structure effectively ensures the geometric stability of the cavity containing the capillary mechanism 2, preventing system failures caused by structural deformation. Furthermore, this symmetrical, interlocking layout further enhances the sealing and insulation continuity of the joints. The densely distributed interlocking points minimize the gaps between panels and create a tortuous path, significantly suppressing air infiltration and lateral heat conduction, strengthening the ability to block thermal bridging, ensuring that heat radiates upwards in an orderly manner, and improving heating efficiency and floor temperature uniformity.

[0036] Preferably, in this embodiment, the interlocking protrusion 4 on the insulation substrate 1 has an inverted trapezoidal structure, and the interlocking groove 5 on the insulation substrate 1 has a trapezoidal structure; the interlocking protrusion 4 on the insulation cover plate 3 has a trapezoidal structure, and the interlocking groove 5 on the insulation cover plate 3 has an inverted trapezoidal structure. This geometric design allows the inverted trapezoidal protrusion on the insulation substrate 1 to accurately embed into the trapezoidal groove on the insulation cover plate 3 when adjacent floor heating panels are spliced, while the trapezoidal protrusion on the insulation cover plate 3 also correspondingly inserts into the inverted trapezoidal groove on the insulation substrate 1, forming a highly stable connection interface with staggered, bidirectional interlocking. This structural design has multiple advantages: First, the combination of the trapezoidal and inverted trapezoidal shapes creates a "wedge locking" effect. When the two panels are joined, the trapezoidal bevels act as guides during assembly, facilitating quick alignment. Once fully fitted, the bevels form a tightly fitting bearing surface that tightens under vertical loads, significantly enhancing the connection's tensile and shear resistance and effectively preventing loosening, separation, or misalignment due to vibration or thermal expansion and contraction during use. Secondly, this structure greatly enhances the tightness of the panel fit, resulting in minimal gaps and a large contact area. This not only improves the overall structural seal but also effectively blocks the path of heat loss through the joints, further suppressing the thermal bridging effect and ensuring concentrated upward heat radiation from the underfloor heating system, improving energy efficiency and floor temperature uniformity. Particularly noteworthy is that this inverted trapezoidal-trapezoidal interlocking structure maintains excellent disassembly while ensuring a high-strength connection. Because the bevel design provides natural separation guidance, maintenance personnel can apply moderate external force along the bevel direction using specialized tools to achieve non-destructive disassembly when inspecting or replacing partial underfloor heating panels, avoiding material damage easily caused by traditional adhesive or snap-fit ​​structures. This greatly facilitates later maintenance, partial replacement or system upgrades, and supports the sustainable use and flexible adjustment of the underfloor heating system.

[0037] Preferably, in this embodiment, the wide bottom edge of the interlocking protrusion 4 is provided with a first rounded corner, and the narrow bottom edge of the interlocking groove 5 is provided with a second rounded corner that mates with the corresponding first rounded corner. This design not only effectively simplifies the assembly process but also significantly reduces the frictional resistance during splicing. During the alignment and connection of the underfloor heating panels, the first rounded corner, as an extension of the guiding slope, further enhances the guiding function, allowing the protrusion to slide more smoothly into the predetermined position when entering the groove, avoiding material damage caused by sharp corner jamming or scratching. At the same time, the rounded corner structure reduces the point contact or line contact stress between the contact surfaces, making the pressure distribution more uniform, reducing local wear, and improving assembly smoothness and operational efficiency. More importantly, this rounded corner design has a certain error tolerance capability. In actual construction, due to environmental temperature differences, transportation deformation, or human operation deviations, there may be slight dimensional errors or angular offsets at the edges of the panels. The rounded corners provide a buffer space for the alignment of the protrusions and grooves, absorbing minor deviations within a certain range and achieving "flexible mating." This avoids forced splicing or structural damage caused by rigid interference, thereby improving the fault tolerance and overall assembly accuracy during actual installation. Furthermore, the rounded corner structure enhances the mechanical reliability of the connection area. The smooth transition effectively alleviates stress concentration, especially under repeated thermal expansion and contraction or dynamic loads, preventing cracks from forming and propagating at sharp corners, thus improving the fatigue life and long-term stability of the interlocking structure. Simultaneously, the tightly fitting rounded corners further improve the sealing of the joint, reducing air infiltration and heat leakage, and strengthening the suppression of thermal bridging.

[0038] Preferably, in this embodiment, the interlocking protrusion 4 is provided with a space compensation groove 41. The space compensation groove 41 extends along a direction perpendicular to the extension of the first interlocking structure 12 and penetrates through the opposite sides of the interlocking protrusion 4, so that the opposite sides of the interlocking protrusion 4 located in the space compensation groove 41 can approach each other to avoid the corresponding interlocking groove 5. This design significantly improves the assembly adaptability and tolerance of the interlocking structure. When the interlocking protrusion 4 is inserted into the corresponding interlocking groove 5, if there is a slight deviation in size due to material expansion, manufacturing tolerance, temperature change, or transportation deformation, the protrusion may have difficulty being inserted smoothly or generate excessive assembly stress. The existence of the space compensation groove 41 gives the protrusion a certain radial compression capability: during the pressing process, the two wings are slightly retracted inward under the pressure of the groove sidewall, reducing the instantaneous cross-sectional width, and returning to their original shape after passing smoothly through the inlet, achieving a tight fit. After insertion, the protrusion relies on the elasticity of the material itself to return to its original shape and fit tightly with the groove, ensuring the stability and sealing of the connection. The groove is typically an inverted V-shape, with its opening facing upwards and its narrow section facing downwards, extending through both sides of the interlocking protrusion 4, and featuring rounded corners at the ends of the narrow sections. This unique geometry ensures efficient stress concentration release during elastic deformation of the groove, while the rounded corners prevent stress concentration at sharp angles that could lead to material cracking or fatigue damage. The sloping sidewalls of the inverted V-shape gradually contact the edge of the interlocking groove 5 during assembly, further enhancing the guiding effect and allowing the two wings of the protrusion to more easily retract inwards during pressing, achieving a smooth transition.

[0039] Preferably, in this embodiment, the interlocking groove 5 is provided with a strength compensation protrusion 51, which is used to fit into the corresponding space compensation groove 41. Since the space compensation groove 41, while improving assembly adaptability, may partially weaken the structural integrity of the interlocking protrusion 4, it may lead to a decrease in the shear, compressive, and tensile strength of the connection area, posing a risk of loosening or locking failure during long-term use. Therefore, providing the strength compensation protrusion 51 can effectively compensate for this structural weakening problem, restoring and enhancing the overall connection strength. The strength compensation protrusion 51 typically adopts a V-shaped structure, with its tip facing the inverted V-shaped opening of the space compensation groove 41, achieving precise alignment and fitting. When the insulation cover plate 3 and the insulation base plate 1 are joined, the interlocking protrusion 4 elastically retracts into the groove, while the strength compensation protrusion 51 simultaneously slides into the space compensation groove 41. Once assembled, the V-shaped protrusion fits tightly against the inverted V-shaped groove wall, not only filling the gap originally formed by the groove, but also transferring the load through the inclined contact, evenly distributing the external pressure to both sides of the protrusion, significantly improving the overall rigidity and load-bearing capacity of the joint area. At the same time, the V-shaped structure itself has a certain elastic deformation capacity, and can undergo slight compression when subjected to external impact, playing a buffering role, absorbing some kinetic energy, and preventing stress from being directly transmitted to the interior. This elastic buffering mechanism effectively protects the capillary tube 23 from the risk of compression, twisting, or rupture, ensuring the long-term safe operation of the water system. In addition, the fitting of the strength compensation protrusion 51 and the space compensation groove 41 further enhances the sealing of the joint, blocks the airflow path, reduces heat loss along the gap laterally, strengthens the suppression of the thermal bridge effect, and improves the thermal efficiency of the underfloor heating system.

[0040] Preferably, in this embodiment, the capillary mechanism 2 further includes at least one limiting block 24, which has multiple limiting holes through which multiple capillary tubes 23 pass. This design effectively constrains the geometry of the capillary tubes 23 within the receiving groove of the insulation substrate 1, preventing them from bending, deforming, tangling, or shifting due to vibration, compression, or external force during the transportation, handling, or on-site installation of the underfloor heating board. Especially during the factory production and long-distance transportation of prefabricated dry underfloor heating boards, without effective fixation, problems such as local collapse, uneven spacing, or loosening at the connection with the inlet / outlet water pipes 22 can easily occur, affecting the subsequent laying quality and heat exchange uniformity. Through the limiting effect of the limiting block 24, each capillary tube 23 is firmly constrained in the designed position, maintaining a parallel, equidistant, and taut state, ensuring the high accuracy and structural stability of the entire layout. In addition, the setting of the limiting block 24 also improves the assembly consistency and construction reliability of the underfloor heating board. During installation, operators no longer need to manually straighten or position the capillary tubes 23; the underfloor heating panels can be directly spliced ​​into place, significantly improving construction efficiency and reducing human error. Simultaneously, fixing the position of the capillary tubes 23 helps prevent them from being stepped on, flattened, or displaced during concrete filling layer construction or finishing layer installation, ensuring the integrity of the water system and the continuity of the heat transfer path. Furthermore, multiple limiting blocks 24 can be installed along the span between the inlet pipe 21 and the outlet pipe 22, forming multi-point support, enhancing overall rigidity, preventing sagging due to self-weight or external forces, and ensuring they are always in the optimal heat transfer position of the insulation layer. The inner wall of the limiting hole can be designed with a micro-elastic structure or with a guide chamfer, facilitating the insertion of the capillary tubes 23 while preventing scratches on the pipe wall.

[0041] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A prefabricated dry underfloor heating panel with a capillary network radiant surface, characterized in that, include: The heat insulation substrate (1) has a first receiving groove (11) on its top. A capillary mechanism (2) is provided in the first receiving groove (11). The capillary mechanism (2) includes an inlet pipe (21), an outlet pipe (22), and multiple capillary tubes (23). The inlet pipe (21) and the outlet pipe (22) are arranged in parallel. The multiple capillary tubes (23) are located between the inlet pipe (21) and the outlet pipe (22). The two ends of each capillary tube (23) are respectively connected to the inlet pipe (21) and the outlet pipe (22). The heat-insulating cover plate (3) has a second receiving groove (31) at its bottom. The heat-insulating cover plate (3) is detachably covered above the heat-insulating substrate (1). The first receiving groove (11) and the second receiving groove (31) cooperate to form a closed cavity between the heat-insulating substrate (1) and the heat-insulating cover plate (3) to accommodate the capillary mechanism (2).

2. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 1, characterized in that, The heat insulation substrate (1) is provided with a first interlocking structure (12), and the heat insulation cover plate (3) is provided with a second interlocking structure (32). The first interlocking structure (12) and the second interlocking structure (32) can cooperate with each other.

3. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 2, characterized in that, One of the first interlocking structure (12) and the second interlocking structure (32) consists of multiple interlocking protrusions (4) and the other consists of multiple interlocking grooves (5).

4. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 2, characterized in that, The first interlocking structure (12) includes multiple interlocking grooves (5) and multiple interlocking protrusions (4), and the second interlocking structure (32) includes multiple interlocking grooves (5) and multiple interlocking protrusions (4). The multiple interlocking grooves (5) on the insulation substrate (1) and the multiple interlocking protrusions (4) on the insulation cover plate (3) are matched one-to-one. The multiple interlocking protrusions (4) on the insulation substrate (1) and the multiple interlocking grooves (5) on the insulation cover plate (3) are matched one-to-one.

5. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 4, characterized in that, The multiple interlocking grooves (5) provided on the insulation substrate (1) and the multiple interlocking protrusions (4) provided on the insulation cover plate (3) are distributed alternately along the edge of the insulation substrate (1); the multiple interlocking grooves (5) provided on the insulation cover plate (3) and the multiple interlocking protrusions (4) provided on the insulation substrate (1) are distributed alternately along the edge of the insulation cover plate (3).

6. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 4, characterized in that, The interlocking protrusion (4) on the insulation substrate (1) is in the shape of an inverted trapezoid, and the interlocking groove (5) on the insulation substrate (1) is in the shape of a trapezoid; the interlocking protrusion (4) on the insulation cover plate (3) is in the shape of a trapezoid, and the interlocking groove (5) on the insulation cover plate (3) is in the shape of an inverted trapezoid.

7. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 6, characterized in that, The interlocking protrusion (4) has a first engagement rounded corner at its wide bottom edge, and the interlocking groove (5) has a second engagement rounded corner at its narrow bottom edge that engages with the corresponding first engagement rounded corner.

8. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 6, characterized in that, The interlocking protrusion (4) is provided with a space compensation groove (41). The space compensation groove (41) extends along the extension direction perpendicular to the first interlocking structure (12) and passes through the opposite sides of the interlocking protrusion (4) so ​​that the opposite sides of the interlocking protrusion (4) located in the space compensation groove (41) can approach each other to avoid the corresponding interlocking groove (5).

9. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 8, characterized in that, The interlocking groove (5) is provided with a strength compensation protrusion (51), which is used to fit into the corresponding space compensation groove (41).

10. A prefabricated dry underfloor heating panel with a capillary network radiant surface according to claim 1, characterized in that, The capillary mechanism (2) further includes at least one limiting block (24), the limiting block (24) is provided with multiple limiting holes, and multiple capillary tubes (23) are respectively inserted into the limiting holes.

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