A ceiling radiant cooling system

Abstract

This utility model provides a ceiling radiant cooling system, relating to the field of building environmental engineering. It includes multiple radiant cooling units, each with a first parallel flow channel. The first parallel flow channel includes a first liquid inlet, a first liquid outlet, a first liquid inlet channel, a first liquid outlet channel, and multiple first connecting channels. The first liquid inlet channel extends along a first direction and communicates with the first liquid inlet, while the first liquid outlet channel is parallel to and spaced apart from the first liquid inlet channel. The first connecting channels extend along a second direction and are parallel to and spaced apart between the first liquid inlet channel and the first liquid outlet channel; wherein the first connecting channels, the first liquid inlet channel, and the first liquid outlet channel are interconnected, and adjacent first connecting channels form multiple first spacer cavities, the width of which decreases along the first direction. This system effectively ensures the uniformity of the surface temperature of the radiant substrate, avoids localized overcooling, and further prevents condensation.

Description

Technical Field

[0001] This utility model relates to the field of building environmental engineering, and more specifically, to a ceiling radiant cooling system. Background Technology

[0002] In traditional serpentine ceiling radiant cooling systems, two key issues urgently need to be addressed. First, due to the long pipe layout, the working fluid continuously exchanges heat with the surrounding environment during its flow, causing its temperature to gradually increase along the flow direction. Specifically, the working fluid temperature is lower near the inlet section (close to the supply water temperature), while the temperature rises significantly at the outlet section. This temperature gradient leads to significant uneven temperature distribution on the radiant surface, thereby reducing the uniformity of the indoor thermal environment and thermal comfort. Second, to prevent condensation on the radiant surface, the system must strictly control the working fluid supply temperature to ensure it is always lower than the dew point temperature of the indoor air. This constraint not only increases the complexity of system control but also severely limits the system's cooling capacity. Utility Model Content

[0003] This invention provides a ceiling radiant cooling system that, under conditions of limited system water supply temperature, achieves uniform surface temperature through radiant cooling channel structure design, thus avoiding condensation.

[0004] An embodiment of this utility model can be implemented as follows: a ceiling radiant cooling system includes multiple radiant cooling units, each of which has a first parallel flow channel, the first parallel flow channel including:

[0005] First inlet and first outlet;

[0006] The first liquid inlet channel extends along the first direction and is connected to the first liquid inlet;

[0007] The first liquid outlet channel is connected to the first liquid outlet and is parallel to and spaced apart from the first liquid inlet channel;

[0008] Multiple first connecting channels are provided, which extend along a second direction and are parallel and spaced between the first liquid inlet channel and the first liquid outlet channel. The second direction is set at an angle to the first direction.

[0009] The first connecting channel, the first inlet channel, and the first outlet channel are interconnected, and adjacent first connecting channels form a plurality of first spacer cavities, the width of which decreases along a first direction.

[0010] Optionally, the width of the first spacer cavity decreases along the first direction by a fixed amount of 28 to 33 mm.

[0011] Optionally, the number of the first connecting channels is three or more.

[0012] Optionally, each of the radiant cooling units has a second parallel flow channel, the second parallel flow channel comprising:

[0013] Second inlet and second outlet;

[0014] The second liquid inlet channel extends along the first direction and is connected to the second liquid inlet;

[0015] The second liquid outlet channel is connected to the second liquid outlet and is parallel to and spaced apart from the second liquid inlet channel;

[0016] Multiple second connecting channels extend along a second direction and are arranged parallel and spaced between the second inlet channel and the second outlet channel;

[0017] The second connecting channel, the second inlet channel, and the second outlet channel are interconnected. The multiple second connecting channels are parallel to the multiple first connecting channels and are arranged sequentially along the first direction. Adjacent second connecting channels form multiple second spacer cavities, and the width of the second spacer cavities increases along the first direction.

[0018] Optionally, the width of the second spacer cavity increases in a fixed increment of 28 to 33 mm along the first direction.

[0019] Optionally, the radiant cooling unit further includes a radiant substrate, wherein the first parallel flow channel and the second parallel flow channel are both integrated on the radiant substrate, and the radiant cooling unit includes a first cooling unit;

[0020] The radiating substrate has a first end and a second end opposite to each other. The first cooling unit includes a first parallel flow channel and a second parallel flow channel, with the first parallel flow channel adjacent to the first end and the second parallel flow channel adjacent to the second end.

[0021] Optionally, the radiant cooling unit further includes a second cooling unit, which includes the first parallel flow channel and the second parallel flow channel;

[0022] In the second cooling unit, the first parallel flow channel is adjacent to the second end, and the second parallel flow channel is close to the first end.

[0023] Optionally, the first cooling unit and the second cooling unit are arranged alternately and connected in series along the second direction; the first cooling unit is arranged alternately and connected in parallel along the first direction, and the second cooling unit is arranged alternately and connected in parallel along the first direction.

[0024] Optionally, the ceiling radiant cooling system further includes an inlet main pipe and an outlet main pipe that are interconnected, and the inlet main pipe, the outlet main pipe and the first inlet flow channel are parallel;

[0025] The main inlet pipe is connected to the first inlet and the second inlet, so that the first cooling unit is spaced apart and connected in parallel along the first direction, and the second cooling unit is spaced apart and connected in parallel along the first direction.

[0026] Optionally, there are two inlet manifolds, namely a first inlet manifold and a second inlet manifold. The first inlet manifold is connected to the first inlet, and the second inlet manifold is connected to the second inlet.

[0027] The fluid flow directions of the first inlet manifold and the second inlet manifold are opposite.

[0028] The beneficial effects of the ceiling radiant cooling system according to this embodiment of the present invention include, for example:

[0029] A ceiling radiant cooling system includes multiple radiant cooling units, each having a first parallel flow channel. The first parallel flow channel includes a first liquid inlet, a first liquid outlet, a first liquid inlet channel, a first liquid outlet channel, and multiple first connecting channels. The first liquid inlet channel extends along a first direction and communicates with the first liquid inlet. The first liquid outlet channel communicates with the first liquid outlet and is parallel to and spaced apart from the first liquid inlet channel. The first connecting channels extend along a second direction and are parallel to and spaced apart between the first liquid inlet channel and the first liquid outlet channel, the second direction forming an angle with the first direction. The first connecting channels, the first liquid inlet channel, and the first liquid outlet channel are interconnected, and adjacent first connecting channels form multiple first partition cavities, the width of which decreases along the first direction.

[0030] Because the width of the first gap cavity formed between adjacent first connecting channels gradually decreases along the first direction, when the cooling medium flows from the first inlet into the first parallel channel, the difference in flow resistance during the flow of the cooling medium in the first direction is reduced. The flow distribution of the cooling medium in the multiple parallel first connecting channels is more uniform, and the temperature tends to be consistent, thereby effectively ensuring the uniformity of the surface temperature of the radiant substrate, avoiding local overcooling, and further preventing condensation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the first embodiment of the ceiling radiant cooling system provided in this embodiment;

[0033] Figure 2 This is a schematic diagram of the second embodiment of the ceiling radiant cooling system provided in this embodiment;

[0034] Figure 3 This is a structural schematic diagram of a third embodiment of the ceiling radiant cooling system provided in this embodiment.

[0035] Icons: 1-Ceiling radiant cooling system; 10-Radiant cooling unit; 100-First parallel flow channel; 110-First liquid inlet flow channel; 120-First liquid outlet flow channel; 130-First connecting flow channel; 101-First liquid inlet; 102-First liquid outlet; 131-First partition cavity; 200-Second parallel flow channel; 201-Second liquid inlet; 202-Second liquid outlet; 210-Second liquid inlet flow channel; 220-Second liquid outlet flow channel; 230-Second connecting flow channel; 231-Second partition cavity; 300-Radiant substrate; 11-First cooling unit; 12-Second cooling unit; 300a-First end; 300b-Second end; 20-Main liquid inlet pipe; 30-Main liquid outlet pipe; 21-First main liquid inlet pipe; 22-Second main liquid inlet pipe. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0041] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0042] First Embodiment

[0043] Please refer to the reference. Figure 1 This utility model provides a ceiling radiant cooling system 1 for cooling the environment and preventing condensation.

[0044] It should be noted that the cooling function of the system originates from the flow channels. The cooling medium in the first parallel flow channel 100 and the second parallel flow channel 200 dissipates cooling to the environment through the radiant substrate 300. The flow channels are embedded and integrated inside the radiant substrate 300, and multiple such radiant cooling units 10 are installed on the top of the space to be cooled by a suspension system.

[0045] Specifically, the ceiling radiant cooling system 1 includes multiple radiant cooling units 10, each of which has a first parallel flow channel 100 and a second parallel flow channel 200. The first parallel flow channel 100 includes: a first inlet 101 and a first outlet 102; a first inlet flow channel 110 extending along a first direction and communicating with the first inlet 101; a first outlet flow channel 120 communicating with the first outlet 102 and being parallel to and spaced apart from the first inlet flow channel 110; and multiple first connecting flow channels 130 extending along a second direction and being parallel and spaced apart between the first inlet flow channel 110 and the first outlet flow channel 120, wherein the second direction is at an angle to the first direction; wherein the first connecting flow channel 130, the first inlet flow channel 110 and the first outlet flow channel 120 are interconnected, and adjacent first connecting flow channels 130 form multiple first spacer cavities 131, the width of the first spacer cavities 131 decreasing along the first direction.

[0046] The second parallel flow channel 200 includes: a second inlet 201 and a second outlet 202; a second inlet flow channel 210 extending along a first direction and communicating with the second inlet 201; a second outlet flow channel 220 communicating with the second outlet 202 and being parallel to and spaced apart from the second inlet flow channel 210; and multiple second connecting flow channels 230 extending along a second direction and being parallel and spaced apart between the second inlet flow channel 210 and the second outlet flow channel 220; wherein the second connecting flow channel 230, the second inlet flow channel 210 and the second outlet flow channel 220 are interconnected, the multiple second connecting flow channels 230 are parallel to the multiple first connecting flow channels 130 and are arranged sequentially along the first direction, and adjacent second connecting flow channels 230 form multiple second spacer cavities 231, the width of the second spacer cavities 231 increasing along the first direction.

[0047] In this embodiment, four radiant cooling units 10 are arranged along the first and second directions, forming a 2×2 array layout. The first parallel flow channel 100 and the second parallel flow channel 200 are centrally symmetrically distributed, and they are highly similar in structure and working principle. To avoid repetition, the following description will mainly focus on the first parallel flow channel 100 as an example. The operating principle of the second parallel flow channel 200 can be deduced by analogy and will not be repeated.

[0048] When the cooling medium flows from the first inlet 101 into the first inlet channel 110 of the first parallel flow channel 100, the width of the first spacer 131 formed between adjacent first connecting channels 130 gradually decreases along the first direction. This structural layout helps to reduce the flow resistance difference during the flow of the cooling medium in the first direction. As a result, the flow rate distribution of the cooling medium in the multiple parallel first connecting channels 130 is more uniform, and the temperature tends to be consistent, thereby effectively ensuring the uniformity of the surface temperature of the radiant substrate 300, avoiding local overcooling, and further preventing condensation.

[0049] Furthermore, both the first parallel flow channel 100 and the second parallel flow channel 200 are integrated into the radiating substrate 300, and the radiating cooling unit 10 includes a first cooling unit 11. The radiating substrate 300 has a first end 300a and a second end 300b, and the first cooling unit 11 includes the first parallel flow channel 100 and the second parallel flow channel 200, with the first parallel flow channel 100 adjacent to the first end 300a and the second parallel flow channel 200 adjacent to the second end 300b. The first parallel flow channel 100 and the second parallel flow channel 200 are centrally symmetrically distributed, and the first parallel flow channel 100 is adjacent to the first end 300a. This structural design helps to enhance the cooling uniformity of the cooling medium. Specifically, the multiple first connecting flow channels 130 and second connecting flow channels 230 are arranged in a "dense in the middle and sparse on both sides" manner, which further optimizes the flow channel distribution, improves cooling uniformity and efficiency, and avoids local overcooling.

[0050] The above describes one arrangement of the first parallel flow channel 100 and the second parallel flow channel 200, which is the structure of the first cooling unit 11. If their positions are interchanged, with the first parallel flow channel 100 adjacent to the second end 300b and the second parallel flow channel 200 adjacent to the first end 300a, then a second cooling unit 12 is formed. The cooling principle of the second cooling unit 12 is similar to that of the first cooling unit 11, and will not be described again here.

[0051] It is easy to understand that the radiant substrate 300 is the core heat exchange component in the radiant cooling system. It is usually made of metal (such as aluminum alloy) and has both high thermal conductivity and architectural decorative function. The pipes are thermally coupled and structurally integrated with the substrate through processes such as extrusion, brazing or rolling to form an integrated "flow channel-substrate" module, which ensures the structural integrity while achieving uniform radiation of cold energy into the room.

[0052] Furthermore, the width of the first spacer cavity 131 decreases along the first direction by a fixed decrease of 28 to 33 mm; the width of the second spacer cavity 231 increases along the first direction by a fixed decrease of 28 to 33 mm.

[0053] In this embodiment, the first cooling unit 11 and the second cooling unit 12 have the same dimensions, with a width-to-length ratio of 1.2, and the decrease / increase in the first partition cavity 131 / second partition cavity 231 is 30 mm. In the first cooling unit 11, the widths of the first partition cavity 131 along the first direction are: 180 mm, 150 mm, 120 mm, 90 mm; the widths of the second partition cavity 231 along the first direction are: 90 mm, 120 mm, 150 mm, 180 mm. In the second cooling unit 12, the widths of the first partition cavity 131 along the first direction are: 90 mm, 120 mm, 150 mm, 180 mm; the widths of the second partition cavity 231 along the first direction are: 180 mm, 150 mm, 120 mm, 90 mm.

[0054] Furthermore, the number of first connecting channels 130 is three or more.

[0055] It should be noted that, in order to improve the uniformity of the cooling effect of the ceiling radiant cooling system 1, and taking into account the actual dimensions of the first cooling unit 11 and the second cooling unit 12, the width variation (decreasing / increasing amount) of the first partition cavity 131 and the second partition cavity 231 is controlled by absolute value. The specific number of the first connecting channels 130 and the second connecting channels 230 integrated on the radiant substrate 300, while meeting the aforementioned width variation requirements, needs to be evenly arranged according to the actual dimensions of the radiant substrate 300 in the first direction, until the entire surface of the radiant substrate 300 is covered. Therefore, the number of channels can be adjusted according to actual engineering needs, which also means that the number of the first connecting channels 130 and the second connecting channels 230 can be different.

[0056] Furthermore, the first cooling unit 11 and the second cooling unit 12 are arranged alternately and connected in series along the second direction; the first cooling unit 11 is arranged alternately and connected in parallel along the first direction, and the second cooling unit 12 is arranged alternately and connected in parallel along the first direction.

[0057] It should be noted that since the first cooling unit 11 and the second cooling unit 12 are connected in series in the second direction, this arrangement will prolong the flow path of the cooling medium in the second direction, which may have a certain impact on the cooling uniformity of the system. Therefore, in this embodiment, only one first cooling unit 11 and one second cooling unit 12 are connected in series in the second direction. In subsequent embodiments involving three cooling units connected in series, it should also be noted that, in order to ensure cooling uniformity, the number of cooling units connected in series should be strictly controlled and should not be too large.

[0058] Furthermore, the ceiling radiant cooling system 1 also includes an inlet manifold 20 and an outlet manifold 30 that are interconnected, and the inlet manifold 20, the outlet manifold 30 and the first inlet flow channel 110 are parallel; the inlet manifold 20 is connected to the first inlet port 101 and the second inlet port 201, so that the first cooling unit 11 and the first cooling unit 11 are connected in parallel along the first direction.

[0059] To save space and improve cooling efficiency, in this embodiment, both the inlet manifold 20 and the outlet manifold 30 are arranged parallel to the first inlet flow channel 110. This design fully considers the space constraints in actual installation. In other embodiments, the inlet manifold 20 and the outlet manifold 30 can also be adjusted to be parallel to the first connecting flow channel 130 according to actual application requirements to further improve the flexibility and applicability of system integration.

[0060] Furthermore, there are two liquid inlet manifolds 20, namely a first liquid inlet manifold 21 and a second liquid inlet manifold 22. The first liquid inlet manifold 21 is connected to the first liquid inlet 101, and the second liquid inlet manifold 22 is connected to the second liquid inlet 201. The fluid flow directions of the first liquid inlet manifold 21 and the second liquid inlet manifold 22 are opposite.

[0061] In this embodiment, due to the limitations of the actual area and shape of the cooling space, only two inlet manifolds 20 and outlet manifolds 30 are provided. In subsequent embodiments, if the size of the cooling space is increased, and considering the influence of the flow path and flow resistance distribution of the cooling medium in the first direction, the number of inlet manifolds 20 and outlet manifolds 30 can be increased accordingly. The specific configuration will be detailed later.

[0062] Second Embodiment

[0063] Please refer to Figure 2 This utility model embodiment provides a ceiling radiant cooling system 1. Compared with the first embodiment, the difference in this embodiment is that the number of first cooling units 11 and second cooling units 12 are different.

[0064] In this embodiment, considering the size and shape of the actual cooling area, the first cooling unit 11-the second cooling unit 12-the first cooling unit 11 (hereinafter, the first cooling unit 11 is distinguished as the first group of first cooling units 11 and the second group of first cooling units 11) are arranged in sequence in the second direction. The first cooling unit 11 and the second cooling unit 12 are continuously and repeatedly arranged in the first direction, eventually forming a 4×3 arrangement matrix.

[0065] In this embodiment, the first cooling unit 11 and the second cooling unit 12 have the same dimensions, with a width-to-length ratio of 1.2, and the decrease / increase in the distance between the first partition cavity 131 and the second partition cavity 231 is 28 mm. In the first cooling unit 11, the widths of the first partition cavity 131 along the first direction are: 180 mm, 152 mm, 124 mm, and 96 mm; the widths of the second partition cavity 231 along the first direction are: 96 mm, 124 mm, 152 mm, and 180 mm. In the second cooling unit 12, the widths of the first partition cavity 131 along the first direction are: 96 mm, 124 mm, 152 mm, and 180 mm; the widths of the second partition cavity 231 along the first direction are: 180 mm, 152 mm, 124 mm, and 96 mm.

[0066] It is easy to understand that this embodiment also has two liquid inlet manifolds 20 (the following description uses the liquid inlet manifold 20 as an example). The two liquid inlet manifolds 20 respectively connect the four first parallel flow channels 100 in the first group of first cooling units 11 in parallel. After the cooling medium flows through the first parallel flow channel 100, it enters the second group of second cooling units 12 connected in series with the flow channel, and completes the cooling radiation process therein. Finally, it is discharged to the liquid outlet manifold 30 through the first liquid outlet 102 of the second group of first cooling units 11 connected to the second cooling unit 12, thereby flowing out of the system.

[0067] The beneficial effects of the ceiling radiant cooling system 1 provided in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0068] Third Embodiment

[0069] Please refer to Figure 3 This utility model embodiment provides a ceiling radiant cooling system 1. Compared with the first embodiment, the difference in this embodiment is that the number of first cooling units 11 and second cooling units 12 are different, and the number of inlet / outlet water mains is set to multiple, ultimately forming a 6×3 arrangement matrix.

[0070] In this embodiment, the first cooling unit 11 and the second cooling unit 12 have the same dimensions, with a width-to-length ratio of 1.2, and the decrease / increase in the first partition cavity 131 / second partition cavity 231 is 33 mm. In the first cooling unit 11, the widths of the first partition cavity 131 along the first direction are: 180 mm, 147 mm, 114 mm, 81 mm; the widths of the second partition cavity 231 along the first direction are: 81 mm, 114 mm, 147 mm, 180 mm. In the second cooling unit 12, the widths of the first partition cavity 131 along the first direction are: 81 mm, 114 mm, 147 mm, 180 mm; the widths of the second partition cavity 231 along the first direction are: 180 mm, 147 mm, 114 mm, 81 mm.

[0071] In this embodiment, considering that the actual area and shape of the cooling space significantly lengthen the extension path of the liquid inlet manifold 20 in the first direction, four liquid inlet manifolds 20 are provided on both sides of the cooling unit to reduce the impact of the flow path and flow resistance distribution on the system's cooling performance. Each liquid inlet manifold 20 supplies liquid to four first parallel flow channels 100 and connects them in parallel. Although the number of first cooling units 11 and second cooling units 12 and the number of inlet / outlet manifolds are different from those in the second embodiment, the flow path of the cooling medium remains unchanged because the arrangement of the cooling units in the second direction (first cooling unit 11-second cooling unit 12-first cooling unit 11) is the same as in the second embodiment. Therefore, the specific flow process will not be described in detail here.

[0072] The beneficial effects of the ceiling radiant cooling system 1 provided in this embodiment are the same as those in the second embodiment, and will not be repeated here.

[0073] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A ceiling radiant cooling system, characterized by, It includes multiple radiant cooling units (10), each of which has a first parallel flow channel (100), the first parallel flow channel (100) including: First liquid inlet (101) and first liquid outlet (102); The first liquid inlet channel (110) extends along the first direction and communicates with the first liquid inlet (101); The first liquid outlet channel (120) is connected to the first liquid outlet (102) and is parallel to and spaced apart from the first liquid inlet channel (110); Multiple first connecting channels (130) extend along a second direction and are arranged parallel to each other between the first liquid inlet channel (110) and the first liquid outlet channel (120), and the second direction is arranged at an angle to the first direction; The first connecting channel (130), the first inlet channel (110) and the first outlet channel (120) are interconnected, and adjacent first connecting channels (130) form a plurality of first spacer cavities (131), the width of the first spacer cavity (131) decreasing along the first direction.

2. The ceiling radiant cooling system according to claim 1, characterized in that, The width of the first spacer cavity (131) decreases along the first direction by a fixed amount of 28 to 33 mm.

3. The ceiling radiant cooling system according to claim 2, wherein, The number of the first connecting channels (130) is three or more.

4. The ceiling radiant cooling system according to claim 1, wherein, Each of the radiant cooling units (10) has a second parallel flow channel (200), the second parallel flow channel (200) comprising: Second liquid inlet (201) and second liquid outlet (202); The second liquid inlet channel (210) extends along the first direction and communicates with the second liquid inlet (201); The second liquid outlet channel (220) is connected to the second liquid outlet (202) and is parallel to and spaced apart from the second liquid inlet channel (210); Multiple second connecting channels (230) extend along a second direction and are arranged parallel to each other between the second liquid inlet channel (210) and the second liquid outlet channel (220); The second connecting channel (230), the second inlet channel (210), and the second outlet channel (220) are interconnected. The multiple second connecting channels (230) are parallel to the multiple first connecting channels (130) and are arranged sequentially along the first direction. Adjacent second connecting channels (230) form multiple second spacer cavities (231), and the width of the second spacer cavity (231) increases along the first direction.

5. The ceiling radiant cooling system according to claim 4, characterized in that, The width of the second spacer cavity (231) increases in a fixed increment of 28 to 33 mm along the first direction.

6. The ceiling radiant cooling system according to claim 4, wherein, The radiant cooling unit (10) also has a radiant substrate (300), the first parallel flow channel (100) and the second parallel flow channel (200) are both integrated on the radiant substrate (300), and the radiant cooling unit (10) includes a first cooling unit (11). The radiating substrate (300) has a first end (300a) and a second end (300b) opposite each other. The first cooling unit (11) includes a first parallel flow channel (100) and a second parallel flow channel (200), with the first parallel flow channel (100) adjacent to the first end (300a) and the second parallel flow channel (200) adjacent to the second end (300b).

7. The ceiling radiant cooling system according to claim 6, wherein, The radiant cooling unit (10) further includes a second cooling unit (12), which includes the first parallel flow channel (100) and the second parallel flow channel (200). In the second cooling unit (12), the first parallel flow channel (100) is adjacent to the second end (300b), and the second parallel flow channel (200) is adjacent to the first end (300a).

8. The ceiling radiant cooling system according to claim 7, characterized in that, The first cooling unit (11) and the second cooling unit (12) are arranged alternately and connected in series along the second direction; the first cooling unit (11) is arranged alternately and connected in parallel along the first direction, and the second cooling unit (12) is connected in parallel along the first direction.

9. The ceiling radiant cooling system according to claim 8, characterized in that, The ceiling radiant cooling system (1) also includes an inlet manifold (20) and an outlet manifold (30) that are connected to each other. The inlet manifold (20) and the outlet manifold (30) are parallel to the first inlet channel (110). The main inlet pipe (20) is connected to the first inlet (101) and the second inlet (201) so that the first cooling unit (11) is connected in parallel along the first direction.

10. The ceiling radiant cooling system according to claim 9, characterized in that, There are two main inlet pipes (20), namely a first main inlet pipe (21) and a second main inlet pipe (22). The first main inlet pipe (21) is connected to the first inlet port (101), and the second main inlet pipe (22) is connected to the second inlet port (201). The fluid flow direction of the first inlet manifold (21) is opposite to that of the second inlet manifold (22).

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