阅读说明：本技术 滑冰场二氧化碳跨临界直冷系统 (Carbon dioxide transcritical direct cooling system for skating rink ) 是由 陈继辉 于 2021-01-25 设计创作，主要内容包括：本申请涉及冰场制冷技术的一种滑冰场二氧化碳跨临界直冷系统,其包括原楼板层,原楼板层上由下至上依次设置有加热防冻层、支撑层和制冷层；支撑层和制冷层上设置有用于降低制冷层温度使制冷层上的水冻结为冰层的二氧化碳制冷机构,加热防冻层上设置用于对加热防冻层加热避免加热防冻层冻胀破裂的散热机构；二氧化碳制冷机构包括设置在制冷层内的吸热制冷组件,吸热制冷组件一侧设置有用于吸热制冷组件液态二氧化碳供给以及气态二氧化碳回收的二氧化碳跨临界直冷压缩机组。本申请具有提高制冷效率,减少资源浪费的效果。(The application relates to a carbon dioxide transcritical direct cooling system of an ice rink in the refrigeration technology of the ice rink, which comprises an original floor layer, wherein a heating anti-freezing layer, a supporting layer and a refrigerating layer are sequentially arranged on the original floor layer from bottom to top; the support layer and the refrigerating layer are provided with a carbon dioxide refrigerating mechanism for reducing the temperature of the refrigerating layer to freeze water on the refrigerating layer into an ice layer, and the heating anti-freezing layer is provided with a heat dissipation mechanism for heating the heating anti-freezing layer to avoid frost heaving and cracking of the heating anti-freezing layer; the carbon dioxide refrigeration mechanism comprises a heat absorption refrigeration assembly arranged in a refrigeration layer, and a carbon dioxide transcritical direct-cooling compressor unit used for supplying liquid carbon dioxide to the heat absorption refrigeration assembly and recovering gaseous carbon dioxide is arranged on one side of the heat absorption refrigeration assembly. The refrigeration system has the effects of improving refrigeration efficiency and reducing resource waste.)

1. A carbon dioxide transcritical direct cooling system for an ice skating rink is characterized in that: the floor comprises an original floor layer (1), wherein a heating anti-freezing layer (11), a supporting layer (17) and a refrigerating layer (18) are arranged on the original floor layer (1) from bottom to top; a carbon dioxide refrigerating mechanism (2) for reducing the temperature of the refrigerating layer (18) to freeze water on the refrigerating layer (18) into an ice layer (19) is arranged on the supporting layer (17) and the refrigerating layer (18), and a heat dissipation mechanism (3) for heating the heating anti-freezing layer (11) to avoid frost heaving and cracking of the heating anti-freezing layer (11) is arranged on the heating anti-freezing layer (11); the carbon dioxide refrigerating mechanism (2) comprises a heat absorption refrigerating assembly arranged in a refrigerating layer (18), and a carbon dioxide transcritical direct-cooling compressor unit (21) used for supplying liquid carbon dioxide and recovering gaseous carbon dioxide of the heat absorption refrigerating assembly is arranged on one side of the heat absorption refrigerating assembly.

2. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 1, wherein: the heat absorption refrigeration assembly comprises a liquid inlet pipe (24) embedded in a supporting layer (17), one end of the liquid inlet pipe (24) is connected with a refrigerant outlet of the carbon dioxide transcritical direct-cooling compressor unit (21), a balance pipe (25) is arranged on one side of the liquid inlet pipe (24) in parallel with the liquid inlet pipe (24), the balance pipe (25) is arranged along the width direction of the supporting layer (17) and passes through the center of the supporting layer (17), the balance pipe (25) is connected with one end, deviating from the carbon dioxide transcritical direct-cooling compressor unit (21), of the liquid inlet pipe (24) through a bent pipe, an air outlet pipe (26) is arranged on one side, deviating from the liquid inlet pipe (24), of the air outlet pipe (26) is arranged towards one end of the bent pipe in a sealing mode, the other end of the air outlet pipe (26) is connected with a carbon dioxide return port of the carbon dioxide transcritical direct-cooling compressor unit (21, the freezing calandria (27) is laid in the refrigeration layer (18) in a waist-shaped annular shape, and two ends of the freezing calandria (27) are respectively bent downwards to be connected with the tops of the balance pipe (25) and the air outlet pipe (26).

3. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 2, wherein: freezing calandria (27) include first connecting portion (271), annular portion (272) and second connecting portion (273), first connecting portion (271) and second connecting portion (273) are connected with balance pipe (25) and outlet duct (26) top respectively, and first connecting portion (271) top is bent to second connecting portion (273) and is connected with annular portion (272) one end, and second connecting portion (273) are bent to first connecting portion (271) and are connected with the annular portion (272) other end.

4. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 3, wherein: the first connection (271) and the second connection (273) of each of said freezing rows (27) are located on the same side of the annular portion (272).

5. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 2, wherein: the two ends of the freezing calandria (27) are respectively bent downwards to be connected with the balance pipe (25) and the air outlet pipe (26) in a gas welding mode, and the two ends of the freezing calandria (27) are respectively provided with an auxiliary fixing component (4) used for being locked with the balance pipe (25) or the air outlet pipe (26).

6. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 5, wherein: supplementary fixed subassembly (4) are established and are fixed at the annular sub-fastener (41) of freezing calandria (27) tip including the cover, freezing calandria (27) tip is still established and is slided and have a female fastener (42) of establishing with sub-fastener (41) each other card, the both sides of carrying on the back of the body of female fastener (42) respectively are fixed with one and balance pipe (25) or outlet duct (26) each other paste elastic arc (44) that paste, the tip of two arc (44) respectively is fixed with an otic placode (45), wear to be equipped with a bolt (46) on two otic placodes (45) jointly, the tip threaded connection of bolt (46) has a nut (47).

7. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 6, wherein: an elastic pad (43) made of acrylate rubber is clamped between the female clamping piece (42) and the circumferential surface of the balance pipe (25) or the air outlet pipe (26).

8. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 6, wherein: the length ratio of the two arc-shaped plates (44) is one to two, and a gap is reserved between the end parts of the two arc-shaped plates (44).

9. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 1, wherein: the heat dissipation mechanism (3) comprises an ethylene glycol liquid storage tank (31) which is arranged on one side of the heating anti-freezing layer (11) and is connected with the carbon dioxide transcritical direct-cooling compressor unit (21), be connected with a first pipeline (32) on the liquid outlet of ethylene glycol liquid reserve tank (31), first pipeline (32) one side and first pipeline (32) be provided with second pipeline (33) and third pipeline (34) that are parallel to each other, the other end of first pipeline (32) and the corresponding one end interconnect of second pipeline (33), the other end of second pipeline (33) seals the setting, third pipeline (34) are connected towards the one end of ethylene glycol liquid reserve tank (31) and the liquid return mouth of ethylene glycol liquid reserve tank (31), the other end of third pipeline (34) seals the setting, second pipeline (33) and third pipeline (34) top are connected with a plurality of heat calandria (35) jointly, lay in heating frost layer (11) that every heat calandria (35) all are the U type.

10. The carbon dioxide transcritical direct cooling system for an ice rink according to claim 9, wherein: the both ends of hot calandria (35) respectively are provided with a connecting assembly (5) with second pipeline (33) or third pipeline (34), connecting assembly (5) are including fixing connecting pipe (51) on second pipeline (33) or third pipeline (34), seted up an annular (511) in connecting pipe (51), annular (511) inside callipers are equipped with a crown plate (52), crown plate (52) inner circle is fixed with a cross support frame (53), hot calandria (35) inner wall is close to tip department and has scribbled sealed glue and establish on connecting pipe (51), hot calandria (35) are gone up to be close to tip department cover and establish and lock and have a staple bolt (54).

Technical Field

The application relates to the technical field of ice rink refrigeration, in particular to a carbon dioxide transcritical direct cooling system for an ice rink.

Background

Along with the popularization of the ice sports, the ice skating sports are not limited by seasons, indoor ice yards are produced at the same time, and the current artificial ice making technology is developed more and more mature.

The conventional artificial ice making device is generally provided with a refrigeration pipe network below a bearing layer of an ice layer, a refrigeration liquid supply main pipe and an air return main pipe are arranged on one side of the ice field, refrigeration calandria communication is adopted, heat exchange is carried out between a refrigeration medium in the refrigeration calandria and the bearing layer, the temperature of the bearing layer in direct contact with the ice layer is reduced, and then the freezing of the ice layer is realized.

However, the existing large-scale ice rink refrigerating system mostly adopts refrigerating working media such as Freon and the like, has the problem of low efficiency, and easily causes energy waste.

Disclosure of Invention

In order to improve the refrigeration efficiency and reduce the waste of resources, the application provides a carbon dioxide transcritical direct cooling system of a skating rink.

The application provides a skating rink carbon dioxide transcritical direct cooling system adopts following technical scheme:

a carbon dioxide transcritical direct cooling system for an ice rink comprises an original floor layer, wherein a heating anti-freezing layer, a supporting layer and a refrigerating layer are sequentially arranged on the original floor layer from bottom to top; the support layer and the refrigerating layer are provided with a carbon dioxide refrigerating mechanism for reducing the temperature of the refrigerating layer to freeze water on the refrigerating layer into an ice layer, and the heating anti-freezing layer is provided with a heat dissipation mechanism for heating the heating anti-freezing layer to avoid frost heaving and cracking of the heating anti-freezing layer; the carbon dioxide refrigeration mechanism comprises a heat absorption refrigeration assembly arranged in a refrigeration layer, and a carbon dioxide transcritical direct-cooling compressor unit used for supplying liquid carbon dioxide to the heat absorption refrigeration assembly and recovering gaseous carbon dioxide is arranged on one side of the heat absorption refrigeration assembly.

By adopting the technical scheme, the carbon dioxide transcritical direct-cooling compressor unit is started, so that the liquid carbon dioxide refrigerant in the compressor unit enters the heat absorption refrigeration assembly and circulates in the heat absorption refrigeration assembly, and then the liquid carbon dioxide refrigerant in the heat absorption refrigeration assembly absorbs the heat of the refrigeration layer and the water on the refrigeration layer to reduce the temperature of the water and freeze to form an ice layer, thereby reducing the waste of resources caused by refrigerating by using refrigerating media such as Freon and the like and improving the refrigeration efficiency.

Optionally, the heat absorption refrigeration assembly comprises a liquid inlet pipe embedded in the support layer, one end of the liquid inlet pipe is connected with a refrigerant outlet of the carbon dioxide transcritical direct-cooling compressor unit, a balance pipe is arranged on one side of the liquid inlet pipe in parallel with the liquid inlet pipe, the balance pipe is arranged along the width direction of the support layer and passes through the center of the support layer, the balance pipe is connected with one end, away from the carbon dioxide transcritical direct-cooling compressor unit, of the liquid inlet pipe through a bent pipe, an air outlet pipe is arranged on one side, away from the liquid inlet pipe, of the balance pipe, the air outlet pipe is arranged towards one end of the bent pipe in a sealing mode, the other end of the air outlet pipe is connected with a carbon dioxide return port of the carbon dioxide transcritical direct-cooling compressor unit, a plurality of refrigeration calandria kidney-shaped.

By adopting the technical scheme, the liquid carbon dioxide refrigerant in the carbon dioxide transcritical direct-cooling compressor unit sequentially flows through the balance pipe and the freezing calandria through the liquid inlet pipe, is collected by the air outlet pipe and returns to the carbon dioxide transcritical direct-cooling compressor unit again to be recycled, so that the same-form system with the same liquid supply process is formed, the refrigeration flow distribution of the liquid carbon dioxide is more balanced, the ice making efficiency is kept consistent, and the use stability of an ice layer is improved.

Optionally, the freezing calandria includes first connecting portion, annular portion and second connecting portion, and first connecting portion and second connecting portion are connected with balance pipe and outlet duct top respectively, and first connecting portion top is bent to the second connecting portion and is connected with annular portion one end, and the second connecting portion is bent to first connecting portion and is connected with the annular portion other end.

Through adopting above-mentioned technical scheme, will freeze the both ends of calandria and arrange in the cross to make the freezing calandria form into the ring-type and in order to guarantee in succession not to have the breakpoint, thereby make ice surface temperature more even, in order to avoid leading to some supporting layer water icing inefficiency because of the breakpoint, thereby ensure whole ice-making uniformity in time.

Optionally, the first connection portion and the second connection portion of each of the freezing rows of tubes are located on the same side of the annular portion.

By adopting the technical scheme, the flowing directions of the refrigerants in the adjacent freezing discharge pipes on the ice surface are opposite, so that the temperature of the ice surface is more uniform.

Optionally, two ends of the freezing calandria are respectively bent downwards to be connected with the balance pipe and the air outlet pipe in a gas welding mode, and two ends of the freezing calandria are respectively provided with an auxiliary fixing assembly for locking with the balance pipe or the air outlet pipe.

Through adopting above-mentioned technical scheme, with the both ends of freezing calandria respectively with balance tube and outlet duct gas welding be connected, then use supplementary fixed subassembly further consolidate freezing calandria and balance tube and outlet duct be connected to improve the stability in use of freezing calandria and balance tube and outlet duct.

Optionally, supplementary fixed subassembly is established and is fixed at the annular daughter card spare of freezing calandria tip including the cover, and freezing calandria tip still overlaps and establishes and slides and have one with daughter card spare female card spare that the card was established each other, and the both sides of carrying on the back of the body of female fastener respectively are fixed with one and balance pipe or the elastic arc that the outlet duct pasted each other, and the tip of two arcs respectively is fixed with an otic placode, wears to be equipped with a bolt on two otic placodes jointly, and the tip threaded connection of bolt has a nut.

Through adopting above-mentioned technical scheme, establish female fastener and the mutual card of sub card spare, then make the tip of two arcs be close to each other to use bolt and nut to with two otic placodes reciprocal anchorages, can realize the reinforcement of being connected freezing calandria and balance pipe and outlet duct, overall structure is simple to operate, has improved staff's reinforcement efficiency.

Optionally, an elastic pad made of acrylate rubber is clamped between the female clamping piece and the circumferential surface of the balance pipe or the air outlet pipe.

Through adopting above-mentioned technical scheme, the cushion of acrylate rubber material has low temperature resistant corrosion-resistant scheduling characteristic, and arranging of cushion has improved female fastener and balance pipe or the air outlet duct pastes to closely the nature, has also avoided the rigid extrusion that female fastener and balance pipe or air outlet duct direct contact produced simultaneously, has improved the protection to balance pipe or air outlet duct.

Optionally, the length ratio of the two arc plates is one to two, and a gap is left between the end parts of the two arc plates.

Through adopting above-mentioned technical scheme, two arc length ratios are one to two arranging, make two otic placodes on two arcs can be located one side of balance pipe or outlet duct to be convenient for the staff and twist the screw bolt and the nut is fixed, and then improve the simple operation nature.

Optionally, heat dissipation mechanism is including setting up the heat recovery unit who strides critical direct cooling compressor unit with carbon dioxide on one side of the heating freeze-proof layer, be connected with a first pipeline on the liquid outlet of heat recovery unit, first pipeline one side is provided with second pipeline and third pipeline with first pipeline is parallel to each other, the other end of first pipeline and the corresponding one end interconnect of second pipeline, the other end of second pipeline seals the setting, the third pipeline is connected with the liquid return mouth of heat recovery unit towards the one end of heat recovery unit, the other end of third pipeline seals the setting, second pipeline and third pipeline top are connected with a plurality of heat pipes jointly, every heat pipe all is laying of U type in the heating freeze-proof layer.

Through adopting above-mentioned technical scheme, the heat recovery unit can be retrieved the heat that the refrigeration of carbon dioxide transcritical straight cold compressor unit produced and heat the ethylene glycol aqueous solution in the ethylene glycol liquid reserve tank, improves the utilization ratio of the energy, and the ethylene glycol aqueous solution after the heating loops through first pipeline, second pipeline, hot calandria and third pipeline under the effect of ethylene glycol liquid reserve tank built-in pump, forms the same form system that supplies the liquid with the journey, and then makes the heat dissipation heat preservation to heating the heat preservation more even.

Optionally, both ends of the hot calandria respectively are provided with a coupling assembling with second pipeline or third pipeline, coupling assembling is including fixing the connecting pipe on second pipeline or third pipeline, has seted up an annular in the connecting pipe, and the annular inside callipers is equipped with a crown plate, and the crown plate inner circle is fixed with a cross support frame, and the hot calandria inner wall is close to tip department and has scribbled sealed glue and establish on the connecting pipe, and the last end department cover of being close to of hot calandria is established and is locked and is had a staple bolt.

Through adopting above-mentioned technical scheme, establish hot calandria pipe on the connecting pipe to scribble the one deck sealed glue between hot calandria pipe and connecting pipe, then encircle the staple bolt on hot calandria pipe in the position department that corresponds the crown plate, and screw up the staple bolt, thereby with hot calandria and connecting pipe reciprocal anchorage, and crown plate and cross support frame play the support to connecting pipe, hot calandria and staple bolt, make the staple bolt can be tight with hot calandria and connecting pipe reciprocal anchorage.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the refrigeration efficiency is improved, the carbon dioxide transcritical direct-cooling compressor unit is started, the liquid carbon dioxide refrigerant in the carbon dioxide transcritical direct-cooling compressor unit enters the heat absorption refrigeration component and circulates in the heat absorption refrigeration component, and then the liquid carbon dioxide refrigerant in the heat absorption refrigeration component absorbs the heat of the refrigeration layer and the water on the refrigeration layer to reduce the temperature of the water and freeze the refrigeration layer to form an ice layer, so that the waste of resources caused by refrigeration by using refrigeration working media such as Freon and the like is reduced;

2. the stability of the ice layer is improved, the liquid carbon dioxide refrigerant in the carbon dioxide transcritical direct-cooling compressor unit flows through the balance pipe and the freezing calandria in sequence through the liquid inlet pipe, is collected by the air outlet pipe and returns to the carbon dioxide transcritical direct-cooling compressor unit again to be recycled, so that a same-form system with the same liquid supply process is formed, the distribution of the refrigeration flow of the liquid carbon dioxide is more balanced, and the ice making efficiency is kept consistent.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a direct cooling system according to an embodiment of the present application;

FIG. 2 is a schematic view showing the structure of each layer on the upper surface of the original floor slab;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a schematic structural view showing the arrangement of the freezing row pipes in the refrigerating layer;

FIG. 5 is a schematic view showing the structure of the balance tube;

FIG. 6 is a schematic structural view of an auxiliary fixing assembly;

FIG. 7 is a schematic structural view of portion B of FIG. 6;

FIG. 8 is a schematic view showing the arrangement of the heat pipes in the heating antifreeze layer;

fig. 9 is a schematic structural view showing the connecting assembly.

Description of reference numerals: 1. an original floor layer; 11. heating the anti-freezing layer; 12. a cold insulation and anti-freezing layer; 13. a sliding layer; 14. a second protective layer; 15. a waterproof layer; 16. a first protective layer; 17. a support layer; 18. a refrigeration layer; 19. an ice layer; 2. a carbon dioxide refrigeration mechanism; 21. a carbon dioxide transcritical direct cold compressor train; 22. a cooling water unit; 23. a heat recovery unit; 24. a liquid inlet pipe; 25. a balance tube; 26. an air outlet pipe; 27. freezing the calandria; 271. a first connection portion; 272. an annular portion; 273. a second connecting portion; 28. a vertical plate; 281. a semicircular groove; 3. a heat dissipation mechanism; 31. a glycol liquid storage tank; 32. a first conduit; 33. a second conduit; 34. a third pipeline; 35. a hot rack pipe; 4. an auxiliary fixing component; 41. a sub clip; 42. a female fastener; 43. an elastic pad; 44. an arc-shaped plate; 45. an ear plate; 46. a bolt; 47. a nut; 5. a connecting assembly; 51. a connecting pipe; 511. a ring groove; 52. a ring plate; 53. a cross support frame; 54. and (5) hooping.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a carbon dioxide transcritical direct cooling system for an ice skating rink. Referring to fig. 1 and 2, the direct cooling system includes an original floor layer 1, and a heating anti-freezing layer 11, a cold insulation anti-freezing layer 12, a sliding layer 13, a second protective layer 14, a waterproof layer 15, a first protective layer 16, a supporting layer 17 and a refrigerating layer 18 are sequentially arranged on the original floor layer 1 from bottom to top; the support layer 17 and the refrigeration layer 18 are provided with a carbon dioxide refrigeration mechanism 2 for reducing the temperature of the refrigeration layer 18 to freeze water on the refrigeration layer 18 into an ice layer 19, and the heating anti-freezing layer 11 is provided with a heat dissipation mechanism 3 for heating the heating anti-freezing layer 11 to avoid frost heaving and cracking of the heating anti-freezing layer 11.

Referring to fig. 2 and 3, the heating and frost-proof layer 11 is formed by pouring C20 concrete, and the thickness of the heating and frost-proof layer 11 is 55 mm; the cold insulation and anti-freezing layer 12 is formed by stacking an upper layer, a middle layer and a lower layer of polystyrene extruded sheets, the thickness of each layer of polystyrene extruded sheets is 50mm, and the polystyrene extruded sheets between each layer are laid in staggered joints; the sliding layer 13 is formed by laying a PE film with the thickness of 0.2mm and is used for playing a role of sliding and stretching of the upper layer and isolating the upward movement of moisture at the original floor layer 1 below the sliding layer; the first protective layer 16 and the second protective layer 14 are both formed by mixing and pouring cement and mortar, and the first protective layer 16 and the second protective layer 14 are used for protecting and supporting the waterproof layer 15; the waterproof layer 15 is formed by overlapping and fixing SBS waterproof coiled materials, the thickness of the SBS waterproof coiled materials is 4mm so as to prevent water on an ice surface from moving downwards, and the protection of layers below the waterproof layer 15 is improved; the supporting layer 17 and the refrigerating layer 18 are both formed by pouring permanent C40 anti-freezing concrete, and single-layer bidirectional steel bars are arranged in the supporting layer 17 and the refrigerating layer 18 to enhance the strength of the supporting layer 17 and the refrigerating layer 18 and prevent the supporting layer 17 and the refrigerating layer 18 from cracking.

Referring to fig. 1 and 4, the carbon dioxide refrigeration mechanism 2 includes a carbon dioxide transcritical direct-cooling compressor unit 21 disposed near the center of one side of the original floor layer 1 in the length direction, the carbon dioxide transcritical direct-cooling compressor unit 21 is cooled by water cooling, and a cooling water unit 22 is connected to a cooling water outlet and a cooling water inlet of the carbon dioxide transcritical direct-cooling compressor unit 21 for cooling and recycling the cooling water of the carbon dioxide transcritical direct-cooling compressor unit 21; the cooling water unit 22 is further connected to a heat recovery unit 23 for recovering and utilizing waste heat to supply heat to the heat dissipation mechanism 3.

Referring to fig. 4 and 5, a liquid inlet pipe 24 is connected to a refrigerant outlet of the carbon dioxide transcritical direct-cooling compressor unit 21, the liquid inlet pipe 24 extends towards the original floor direction and is laid in the supporting layer 17, the liquid inlet pipe 24 is arranged along the width direction of the supporting layer 17 and is located at the center of the supporting layer 17, a balance pipe 25 is arranged at one side of the liquid inlet pipe 24 in the supporting layer 17, the balance pipe 25 is connected with one end of the liquid inlet pipe 24 far away from the carbon dioxide transcritical direct-cooling compressor unit 21 through a bent pipe, and the balance pipe 25 is arranged towards the seal of one end of the carbon dioxide transcritical direct-cooling compressor unit 21, an air outlet pipe 26 is arranged on one side of the balance pipe 25 in the supporting layer 17, which is far away from the liquid inlet pipe 24, one end of the air outlet pipe 26 is connected with a carbon dioxide return air port of the carbon dioxide transcritical direct-cooling compressor unit 21, and one end of the air outlet pipe 26, which is far away from the carbon dioxide transcritical direct-cooling compressor unit 21, is arranged for sealing.

Referring to fig. 4 and 5, a plurality of waist-shaped annular freezing calandria 27 are laid in the refrigerating layer 18, the waist shape of the freezing calandria 27 is arranged along the length direction of the refrigerating layer 18, the freezing calandria 27 comprises a first connecting part 271, an annular part 272 and a second connecting part 273, the annular part 272 is integrally C-shaped, two ends of the annular part 272C-shaped are respectively located at the top of the balance pipe 25 and the top of the air outlet pipe 26, a plurality of mutually parallel risers 28 are arranged on the supporting layer 17, the risers 28 are arranged along the width direction of the supporting layer 17, a semicircular groove 281 is formed in each riser 28 corresponding to each annular part 272, so that the annular part 272 can be clamped in the semicircular groove 281 to support and limit the annular part 272, the refrigerating layer 18 is poured on the supporting layer 17 at the back, and free shaking of the annular part 272 is; one end of the first connecting part 271 and one end of the second connecting part 273 are respectively connected with the top of the balance tube 25 and the top of the air outlet tube 26 in a gas welding mode, the top of the first connecting part 271 is bent towards the second connecting part 273 and is connected with one end of the annular part 272, the second connecting part 273 is bent towards the first connecting part 271 and is connected with the other end of the annular part 272, and in addition, the first connecting part 271 and the second connecting part 273 of each freezing calandria 27 are both positioned at the same side of the annular part 272, so that the flowing directions of the refrigerants in the freezing calandria 27 adjacent to the ice surface are opposite, and the freezing calandria 27 continuously has no break points; in addition, the liquid inlet pipe 24, the balance pipe 25, the gas outlet pipe 26 and the freezing calandria 27 are seamless steel pipes for low-temperature pipelines made of 16MnDG materials, so that the stable flow of carbon dioxide refrigerants is ensured, and the working stability is improved; the freezing row pipes 27 are also provided with an auxiliary fixing component 4 at each end for locking with the balance pipe 25 or the air outlet pipe 26.

When the water on the supporting layer 17 needs to be made into ice to form the ice layer 19, a worker only needs to start the carbon dioxide transcritical direct-cooling compressor unit 21 to enable the liquid carbon dioxide refrigerant in the carbon dioxide transcritical direct-cooling compressor unit to flow into the liquid inlet pipe 24, transfer the liquid carbon dioxide refrigerant into the balance pipe 25 at the end part of the liquid inlet pipe 24, enter each freezing calandria 27 through the balance pipe 25 to form a same-process system for supplying liquid in the same process, enable the refrigeration flow distribution of the liquid carbon dioxide to be more balanced, further enable the ice making efficiency to be consistent, then the liquid carbon dioxide refrigerant in the freezing calandria 27 uniformly absorbs the heat of the refrigeration layer 18 and the water on the refrigeration layer 18 to enable the temperature of each part of the ice layer 19 to be consistent, then the liquid carbon dioxide refrigerant flows into the air inlet and outlet pipe 26 at the other end of the freezing calandria 27 and is collected to flow to the carbon dioxide transcritical direct-cooling compressor unit, the refrigeration efficiency is improved.

Referring to fig. 6 and 7, the auxiliary fixing assembly 4 includes an annular sub clamping member 41 sleeved and fixed at the end of the freezing calandria 27, the cross section of the sub clamping member 41 is entirely triangular, one side of the triangular cross section of the sub clamping member 41 is fixed with the outer peripheral surface of the freezing calandria 27, the other side of the triangular cross section of the sub clamping member 41 is attached to the outer peripheral surface of the balance pipe 25 or the air outlet pipe 26, the end of the freezing calandria 27 is further sleeved and slidably provided with a female clamping member 42 mutually clamped with the sub clamping member 41, one side of the female clamping member 42 facing the balance pipe 25 or the air outlet pipe 26 is attached with an annular acrylic rubber elastic pad 43, and one side of the elastic pad 43 facing away from the female clamping member 42 is attached to the outer side wall corresponding to the balance pipe 25 or; two elastic arc plates 44 which are mutually attached to the balance pipe 25 or the air outlet pipe 26 are respectively fixed on two opposite sides of the female clamping piece 42, the length ratio of the two arc plates 44 is one to two, and a gap is reserved between the end parts of the two arc plates 44; a rectangular lug plate 45 is fixed at each end of the two arc-shaped plates 44, a bolt 46 is commonly penetrated on the two lug plates 45, and a nut 47 is connected with the end of the bolt 46 through a thread; make two arcs 44 reciprocal anchorages with female fastener 42 and elastic pad 43 tightly fix on balance pipe 25 or outlet duct 26, and then make female fastener 42 carry out the card to fastener 41 and establish spacingly, share the power effect that the welding point of part freezing calandria 27 and balance pipe 25 or outlet duct 26 received on fastener 41 and female fastener 42, improve freezing calandria 27 and balance pipe 25 or outlet duct 26's fixed stability.

Referring to fig. 1 and 8, the heat dissipation mechanism 3 includes an ethylene glycol liquid storage tank 31 disposed on one side of the heating antifreeze layer 11 and connected to the heat recovery unit 23, a first pipeline 32 is connected to a liquid outlet of the ethylene glycol liquid storage tank 31, an ethylene glycol aqueous solution pumped to the first pipeline 32 is disposed in the ethylene glycol liquid storage tank 31, the first pipeline 32 is disposed on one side of the heating antifreeze layer 11 in the length direction and along the length direction of the heating antifreeze layer 11, a second pipeline 33 and a third pipeline 34 are disposed on one side of the first pipeline 32 away from the heating antifreeze layer 11 and parallel to the first pipeline 32, one end of the first pipeline 32 away from the ethylene glycol liquid storage tank 31 is connected to a corresponding end of the second pipeline 33, the other end of the second pipeline 33 is sealed, one end of the third pipeline 34 toward the ethylene glycol liquid storage tank 31 is connected to a liquid return port of the ethylene glycol liquid storage tank 31, the other end of the third pipeline 34 is sealed, the tops of the second pipeline 33 and the third pipeline 34 are jointly provided with a plurality of heat discharging pipes 35, two ends of each heat discharging pipe 35 are respectively provided with a connecting component 5 for connecting two ends of each heat discharging pipe 35 with the tops of the second pipeline 33 and the third pipeline 34, and each heat discharging pipe 35 is laid in the heating anti-freezing layer 11 in a U shape.

Referring to fig. 9, the connection assembly 5 includes connection pipes 51 fixed on the second pipe 33 or the third pipe 34 and adapted to the heat dissipation pipes, each connection pipe 51 is provided with a ring groove 511, a ring plate 52 is fastened and fixed in the ring groove 511, a cross support 53 is fixed on an inner wall of the ring plate 52, a sealant is coated on an inner wall of the heat dissipation pipe 35 near an end portion and is sleeved on the connection pipe 51, a hoop 54 is sleeved and locked on the heat dissipation pipe 35 near the end portion, and the hoop 54 is arranged corresponding to the ring plate 52, so that the ring plate 52 and the cross support 53 support the hoop 54, the connection pipe 51 is prevented from being deformed due to extrusion of the hoop 54, and further, the connection sealing performance between the heat dissipation pipe 35 and the connection pipe 51 is improved.

The heat recovery unit 23 recovers heat generated by refrigeration of the carbon dioxide transcritical direct-cooling compressor unit 21 and heats ethylene glycol aqueous solution in the ethylene glycol liquid storage tank 31, the heated ethylene glycol aqueous solution sequentially passes through the first pipeline 32, the second pipeline 33, the heat exhaust pipe 35 and the third pipeline 34 under the action of a built-in pump of the ethylene glycol liquid storage tank 31, and under the heat dissipation and cold absorption effects of the heat exhaust pipe 35, the temperature in the heating anti-freezing layer 11 is kept consistent with the temperature of the outside atmosphere, so that the original floor layer 1 is protected.

The implementation principle of the carbon dioxide transcritical direct cooling system of the skating rink in the embodiment of the application is as follows: when the water on the supporting layer 17 needs to be made into ice to form the ice layer 19, a worker only needs to start the carbon dioxide transcritical direct-cooling compressor unit 21, so that the liquid carbon dioxide refrigerant in the compressor unit flows into the liquid inlet pipe 24, and is turned into the balance pipe 25 at the end part of the liquid inlet pipe 24, and enters each freezing row pipe 27 through the balance pipe 25, so as to form a system with the same liquid supply process and the same flow, so as to make the refrigeration flow distribution of the liquid carbon dioxide more balanced, thereby keeping the ice making efficiency consistent, and then the liquid carbon dioxide refrigerant in the freezing calandria 27 uniformly absorbs the heat of the refrigerating layer 18 and the water thereon, so as to maintain a uniform temperature throughout the ice layer 19, after which the liquid carbon dioxide refrigerant flows into the inlet and outlet pipes 26 at the other end of the freezing calandria 27 and is collected to flow again to the carbon dioxide transcritical straight cold compressor train 21 for recycling.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.