A spherical ice making mold

Abstract

The utility model relates to the technical field of ice ball preparation, especially a spherical ice preparation mould, the spherical ice preparation mould includes upper mould, lower mould and is used for containing refrigeration liquid's refrigeration pipeline, the upper mould has hemispherical upper inner mould cavity, the lower mould has hemispherical lower inner mould cavity, both connect and form the spherical cavity that can be used for preparing spherical ice after, spiral coiling refrigeration pipeline is in the spherical cavity periphery, liquid inlet of refrigeration pipeline is set up in the lower mould area, and liquid outlet is set up in the upper mould area, and refrigeration liquid can flow from below to above, make the liquid in the spherical cavity can freeze gradually from below to above, effectively discharge the expansion stress in the water body solidification process, avoid the problem that ice ball produces crack because of uneven internal stress.

Description

Technical Field

[0001] This utility model relates to the field of ice hockey preparation technology, and in particular to a spherical ice preparation mold. Background Technology

[0002] Currently, the preparation of ice balls generally involves injecting liquid into a spherical mold cavity with a water inlet, placing the mold in a low-temperature environment to freeze and form the ice ball, removing the mold after the ice ball is formed, and then removing the icicles caused by the water inlet to obtain the ice ball.

[0003] The current ice hockey manufacturing process uses a freezing method from the outside in, which results in a significant temperature difference between the inner and outer layers of the ice hockey, leading to uneven thermal stress and ultimately causing internal cracks. Utility Model Content

[0004] In order to solve the above problems, the purpose of this utility model is to provide a spherical ice preparation mold.

[0005] This utility model is achieved through the following technical solution: A spherical ice-making mold, the mold comprising: The upper mold has a hemispherical upper inner mold cavity; The lower mold has a hemispherical lower inner mold cavity. After the upper mold is connected to the lower mold, the upper inner mold cavity and the lower inner mold cavity are connected to form a spherical cavity. A refrigeration pipe for containing refrigerant liquid is spirally wound around the outer periphery of the spherical cavity. The refrigeration pipe has an inlet and an outlet. The inlet is located in the lower mold area, and the outlet is located in the upper mold area. The refrigerant liquid flows in from the inlet and flows out from the outlet.

[0006] In one possible implementation, the liquid inlet is located in the bottom region of the lower mold, and the liquid outlet is located in the top region of the upper mold.

[0007] In one possible implementation, the upper mold includes an upper inner mold having the hemispherical upper inner mold cavity, the lower mold includes a lower inner mold having the hemispherical lower inner mold cavity, and the refrigeration pipe includes a first pipe and a second pipe. The first pipe is spirally coiled around the outer wall of the lower inner mold, and the second pipe is spirally coiled around the outer wall of the upper inner mold. The first pipe has a first inlet and a first outlet communicating with the first inlet, and the second pipe has a second inlet and a liquid outlet communicating with the second inlet. The first inlet is connected to the liquid outlet, and the second inlet is connected to the first outlet.

[0008] In one possible implementation, the lower mold further includes a bottom mold, which is connected to the bottom of the lower inner mold and is provided with an annular flow channel. The annular flow channel has the liquid inlet and is connected to the first inlet of the first pipe. The refrigerant flows into the annular flow channel from the liquid inlet, and flows through the first pipe and the second pipe in sequence before flowing out from the liquid outlet.

[0009] In one possible implementation, the bottom mold is provided with a flow guide, which is disposed within the annular flow channel and is capable of changing the flow direction of the liquid within the annular flow channel.

[0010] In one possible implementation, the bottom mold has a recess, and the bottom of the lower inner mold is at least partially accommodated in the recess.

[0011] In one possible implementation, the mold includes an adhesive layer, and the upper mold and the lower mold are respectively connected to the refrigeration pipe through the adhesive layer.

[0012] In one possible implementation, the upper mold has a drainage pipe, one end of which is connected to the spherical cavity and the other end is connected to the outside.

[0013] In one possible implementation, the mold further includes a heating element that is wound around the drain pipe.

[0014] In one possible implementation, the mold satisfies at least one of the following characteristics: The lower mold has a liquid injection port, which is connected to the spherical cavity; The bottom of the lower mold is provided with a water outlet, which is connected to the outside.

[0015] This utility model has the following beneficial effects: The spherical ice-making mold of this utility model includes an upper mold, a lower mold, and a refrigeration pipe for containing refrigeration liquid. The upper mold has a hemispherical upper inner mold cavity, and the lower mold has a hemispherical lower inner mold cavity. When the two are connected, they form a spherical cavity that can be used to make spherical ice. The refrigeration pipe is spirally coiled around the outer circumference of the spherical cavity. At the same time, the liquid inlet of the refrigeration pipe is set in the lower mold area, and the liquid outlet is set in the upper mold area. The refrigeration liquid can flow from bottom to top, so that the liquid in the spherical cavity can freeze gradually from bottom to top, effectively relieving the expansion stress during the solidification process of water and avoiding the problem of cracks in the ice ball caused by uneven internal stress. Attached Figure Description

[0016] To more clearly illustrate the technical solutions and advantages in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 : A schematic diagram of the mold structure provided in the embodiments of this disclosure; Figure 2 : A schematic diagram of the structure of the lower mold provided in the embodiments of this disclosure; Figure 3 : A schematic diagram of the structure of the lower mold provided in the embodiments of this disclosure; Figure 4 : A schematic diagram of the structure of the lower mold provided in the embodiments of this disclosure; Figure 5 : A schematic diagram of the structure of the upper mold provided in this embodiment; Figure 6 : A schematic diagram of the structure of the upper mold provided in this embodiment; Figure 7 : A schematic diagram of the structure of the upper mold provided in this embodiment; Figure 8 : A schematic diagram of the bottom mold provided in the embodiments of this disclosure; Figure 9 : A schematic diagram of the bottom mold provided in the embodiments of this disclosure; Figure 10 : A schematic diagram of the structure of the bottom mold provided in the embodiments of this disclosure.

[0018] In the diagram: 1-Upper mold, 11-Upper inner mold, 12-Upper outer mold, 13-Drainage pipe, 2-Lower mold, 21-Lower inner mold, 22-Lower outer mold, 3-Refrigeration pipe, 31-Liquid inlet, 32-Liquid outlet, 33-First pipe, 331-First inlet, 332-First outlet, 333-First liquid outlet pipe, 34-Second pipe, 341-Second inlet, 35-Bottom mold, 351-Annular flow channel, 352-Guide component, 353-Liquid inlet pipe, 354-Second liquid outlet pipe, 4-First transfer pipe, 5-Second transfer pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0021] The embodiments are described below with reference to the accompanying drawings, which do not limit the disclosure described in the claims.

[0022] The following is in conjunction with the appendix Figure 1-9 This invention introduces a spherical ice-making mold provided by an embodiment of the present invention. The mold includes: Upper mold 1 has a hemispherical upper inner mold cavity; The lower mold 2 has a hemispherical lower inner mold cavity. After the upper mold 1 is connected to the lower mold 2, the upper inner mold cavity 11 and the lower inner mold cavity 21 are connected to form a spherical cavity. A refrigeration pipe 3, used to contain the refrigerant liquid, is spirally coiled around the outer circumference of the spherical cavity. The refrigeration pipe 3 has an inlet 31 and an outlet 32. The inlet 31 is located in the lower mold 2 area, and the outlet 32 ​​is located in the upper mold 1 area. The refrigerant liquid flows in through the inlet 31 and flows out through the outlet 32. Using this mold allows the refrigerant liquid to flow from bottom to top, enabling the liquid inside the spherical cavity to freeze gradually from bottom to top. This effectively eliminates the expansion stress during the water's solidification process and avoids the problem of cracks in the ice ball caused by uneven internal stress.

[0023] In some embodiments, such as Figure 1As shown, the liquid inlet 31 is located in the bottom region of the lower mold 2, and the liquid outlet 32 ​​is located in the top region of the upper mold 1. With this configuration, the cooling intensity at the bottom of the spherical cavity is maximized, causing ice crystal nuclei to form first in the bottom region and gradually grow upwards. At the same time, the unfrozen liquid water is pushed and confined to the top of the ice body in an orderly manner. When this part of the water freezes and expands, its expansion force will continuously push the not-yet-fully-frozen liquid layer upwards, ensuring that the expansion stress is continuously and directionally released, thereby effectively suppressing the generation of spherical ice cracks.

[0024] Specifically, the liquid inlet 31 is located at the bottom of the lower mold 2, and the liquid outlet 32 ​​is located at the top of the upper mold 1.

[0025] In some embodiments, the upper mold 1 and the lower mold 2 are connected by a detachable connection.

[0026] Specifically, the upper mold 1 and the lower mold 2 are connected by a snap-fit ​​mechanism. By using a snap-fit ​​connection, it can be ensured that the various parts of the mold will not be misaligned when under pressure or during material injection, thereby ensuring that the relative position of the mold is accurate when the mold is closed and providing sufficient locking force.

[0027] Specifically, both the upper mold 1 and the lower mold 2 can be made of silicone.

[0028] In some embodiments, the cooling pipe 3 is made of metal.

[0029] Specifically, the metal can be made of materials such as copper, copper alloys, or aluminum alloys. These metals have high thermal conductivity, which ensures the cooling effect of the refrigeration pipe 3.

[0030] In some embodiments, such as Figure 6 and Figure 3 As shown, the upper mold 1 includes an upper inner mold 11 with a hemispherical upper inner mold cavity, the lower mold 2 includes a lower inner mold 21 with a hemispherical lower inner mold cavity, and the refrigeration pipe 3 includes a first pipe 33 and a second pipe 34. The first pipe 33 is spirally coiled around the outer wall of the lower inner mold 21, and the second pipe 34 is spirally coiled around the outer wall of the upper inner mold 11. The first pipe 33 has a first inlet 331 and a first outlet 332 connected to the first inlet 331. The second pipe 34 has a second inlet 341 and a liquid outlet 32 ​​connected to the second inlet 341. The first inlet 331 is connected to the liquid outlet 31, and the second inlet 341 is connected to the first outlet 332. By setting the first pipe 33 and the second pipe 34, the refrigerant can flow from bottom to top, thereby allowing the liquid to freeze evenly from the bottom to the top, further avoiding the problem of ice balls cracking due to stress. Moreover, the first pipe 33 and the second pipe 34 can better conform to the contour of the spherical cavity, strengthening the rigidity of the mold and optimizing the heat conduction path.

[0031] Specifically, the number of coils of the first pipe 33 can be 4, 5, 6, etc., and this application does not make a specific limitation here. It is only necessary to ensure that the first pipe 33 can surround the outer side wall of the lower inner mold 21. The number of coils of the second pipe 34 can be 4, 5, 6, etc., and this application does not make a specific limitation here. It is only necessary to ensure that the second pipe 34 can surround the outer side wall of the upper inner mold 11.

[0032] Specifically, the diameter of the first pipe 33 gradually increases from bottom to top, while the diameter of the second pipe 34 gradually decreases from bottom to top.

[0033] In some embodiments, the number of coils in the first conduit 33 is greater than the number of coils in the second conduit 34. By employing a higher density flow channel in the bottom region of the mold, the temperature in the bottom region of the mold can be further reduced, effectively guiding the ice layer to grow from the bottom up.

[0034] In some embodiments, such as Figure 6 As shown, the second pipe 34 also includes a first liquid outlet pipe 333 and a second outlet. The first liquid outlet pipe 333 has a liquid outlet 32 ​​and is connected to the second outlet.

[0035] In some embodiments, such as Figure 4 and Figure 7 As shown, the mold also includes a first transfer pipe 4 and a second transfer pipe 5. One end of the first transfer pipe 4 is connected to the first outlet 332, and the other end is connected to one end of the second transfer pipe 5. The other end of the second transfer pipe 5 is connected to the second inlet 341.

[0036] Specifically, the first transition pipe 4 is located at least outside the lower outer mold 22, and the second transition pipe 5 is located outside the upper outer mold 12.

[0037] In some embodiments, such as Figure 4 and Figure 5 As shown, the upper mold 1 includes an upper outer mold 12 with a hemispherical upper outer mold cavity, and the lower mold 2 includes a lower outer mold 22 with a hemispherical lower outer mold cavity. The upper outer mold 12 and the lower outer mold 22 are connected to form a spherical refrigeration space. The refrigeration pipe 3, the upper inner mold 11 and the lower inner mold 21 are all located in the refrigeration space.

[0038] In some embodiments, such as Figure 2 and Figure 8-10As shown, the lower mold 2 also includes a bottom mold 35, which is connected to the bottom of the lower inner mold 21 and has an annular flow channel 351. The annular flow channel 351 has a liquid inlet 31 and is connected to the first inlet 331 of the first pipe 33. The refrigerant flows into the annular flow channel 351 from the liquid inlet 31, and flows through the first pipe 33 and the second pipe 34 in sequence before flowing out from the liquid outlet 32. Because the diameter of the bottom of the lower inner mold 21 is too small, it cannot be coiled by the refrigerant pipe 3, resulting in a reduction in the cooling effect at the bottom of the spherical cavity. To solve this problem, the annular flow channel 351 is set and connected to the bottom of the lower inner mold 21, which improves the cooling effect at the bottom of the spherical cavity and further optimizes the cooling path.

[0039] Specifically, the bottom mold 35 is located between the bottom of the lower inner mold 21 and the inner wall of the lower outer mold 22.

[0040] In some embodiments, such as Figure 8 As shown, the annular flow channel 351 includes an inlet pipe 353, an annular pipe, and a second outlet pipe 354. The inlet pipe 353 has an inlet port 31. One end of the annular pipe is connected to the inlet pipe 353, and the other end is connected to the second outlet pipe 354. The second outlet pipe 354 is connected to the first inlet 331.

[0041] Specifically, the liquid inlet pipe 353 is at least partially located outside the lower outer mold 22, and the second liquid outlet pipe 354 is at least partially located outside the lower outer mold 22. This arrangement facilitates the injection of refrigerant.

[0042] In some embodiments, such as Figure 9-10 As shown, the bottom mold 35 is provided with a flow guide 352, which is disposed within the annular flow channel 351. The flow guide 352 can change the flow direction of the liquid within the annular flow channel 351. By providing the flow guide 352, the flow direction of the cooling liquid within the annular flow channel 351 can be changed, allowing the annular flow channel 351 to flow clockwise or counterclockwise.

[0043] In some embodiments, the bottom mold 35 has a recessed portion, and the bottom of the lower inner mold 21 is at least partially accommodated in the recessed portion. By providing a recessed portion on the bottom mold 35, the contact area between the bottom of the lower inner mold 21 and the bottom mold 35 is increased, thereby improving the cooling effect at the bottom of the lower inner mold 21.

[0044] Specifically, the recessed portion is an arc shape that matches the shape of the bottom of the lower inner mold 21.

[0045] In some embodiments, the mold includes an adhesive layer, and the upper mold 1 and the lower mold 2 are respectively connected to the refrigeration pipe 3 through the adhesive layer. Specifically, the thermal conductivity of the adhesive layer ranges from 0.002 to 0.1 W / m·K. Using an adhesive layer to connect the refrigeration pipe 3, the upper mold 1, and the lower mold 2 can improve the stability of the mold, and at the same time, the low thermal conductivity of the adhesive layer further ensures the cooling effect of the refrigeration pipe 3.

[0046] Specifically, the adhesive layer is formed of glue with low thermal conductivity.

[0047] In some embodiments, the adhesive layer includes an upper adhesive layer and a lower adhesive layer. The upper outer mold 12 and the upper inner mold 11 are respectively connected to the second pipe 34 through the upper adhesive layer, and the lower outer mold 22 and the lower inner mold 21 are respectively connected to the first pipe 33 through the lower adhesive layer.

[0048] In some embodiments, such as Figure 1 As shown, the upper mold 1 has a drainage pipe 13, one end of which is connected to the spherical cavity, and the other end is connected to the outside. During the freezing process, when the liquid volume in the spherical cavity expands, excess water or gas can be discharged, ensuring the regular shape of the spherical ice.

[0049] Specifically, the upper outer mold 12 has a first drainage outlet, the upper inner mold 11 has a second drainage outlet, the second drainage outlet is connected to the spherical cavity, the first drainage outlet is connected to the outside, and a drainage channel is formed between the first drainage outlet and the second drainage outlet.

[0050] In some embodiments, the mold also includes a heating element that is arranged around the drain pipe 13. By providing a heating element on the drain pipe 13, the problem of the drain pipe 13 freezing during the cooling process, thus preventing excess water or gas from being discharged, is avoided.

[0051] Specifically, the heating element can be a heating wire. In this embodiment, the heating wire can be wound around the drain pipe, thereby preventing the drain pipe from freezing.

[0052] Specifically, the heating element can be made of an alloy, such as an iron-chromium-aluminum alloy or a nickel-chromium alloy, or it can be made of platinum or silicon carbide rods, etc. This application does not make any specific limitations.

[0053] In some embodiments, the lower mold 2 has a liquid injection port connected to the spherical cavity. By providing the injection port, the amount of water injected can be precisely controlled, avoiding uneven water distribution caused by manual mold closing and water injection. It also ensures that the spherical cavity is completely filled with water, preventing the formation of large air bubbles and guaranteeing the ice puck's shape remains intact and without defects. In this embodiment, the volume expansion coefficient can be calculated in advance to inject an appropriate amount of water, further preventing cracks in the ice puck.

[0054] Specifically, the lower mold 2 is provided with a liquid injection channel, one end of which has a liquid injection port, and the other end is connected to the inside of the spherical cavity.

[0055] In some embodiments, the mold includes a first heating coil wound around the injection channel. By providing the first heating coil, the injection channel can be prevented from freezing, thus allowing water to be smoothly added into the spherical cavity.

[0056] Specifically, the first heating coil can be made of an alloy, such as an iron-chromium-aluminum alloy or a nickel-chromium alloy, or it can be made of platinum or silicon carbide rods, etc. This application does not make any specific limitations.

[0057] In some embodiments, the bottom of the lower mold 2 is provided with a water outlet that is connected to the outside. During the cooling process, a small amount of condensate may be generated on the outer wall of the refrigeration pipe 3. By providing a water outlet at the bottom of the lower mold 2, the small amount of condensate can be discharged, thus ensuring the cooling effect of the mold.

[0058] Specifically, the bottom of the lower mold 2 can be provided with multiple water outlets, which are connected to the outside.

[0059] In some embodiments, the bottom of the lower mold 2 is provided with a water outlet pipe, one end of which has a water outlet and the other end is connected to the outside.

[0060] In some embodiments, the mold further includes a first protective element, which is fitted over the outside of the upper mold 1.

[0061] Specifically, the first protective component is provided with a first through-hole for the drainage pipe 13 to pass through.

[0062] Specifically, the first protective component can be made of materials such as plastic or metal.

[0063] In some embodiments, the mold further includes a second protective element, which is fitted over the lower mold 2.

[0064] Specifically, the second protective component can be made of materials such as plastic or metal.

[0065] In some embodiments, the mold further includes a first heat insulation element, which is sleeved on the outside of the lower mold 2.

[0066] Specifically, the first insulation component has a second through-hole through which the water supply and outlet channels pass. By installing the first insulation component, the loss of "cooling capacity" can be reduced, further enhancing the effect of preferential cooling at the bottom.

[0067] Specifically, the material of the first insulation component can be polyurethane foam, rubber and plastic insulation cotton, or elastic foam material, etc.

[0068] In some embodiments, the mold includes a second heat insulation element that wraps around the refrigeration pipe 3. The liquid temperature inside the refrigeration pipe 3 is much lower than the ambient temperature. By providing the second heat insulation element, the pipe is prevented from continuously absorbing heat from the surrounding air, which would raise the temperature of the refrigeration liquid and reduce the cooling effect.

[0069] Specifically, the material of the second insulation component can be polyurethane foam, rubber and plastic insulation cotton, or elastic foam material, etc.

[0070] In some embodiments, the mold includes a second heating ring that is wound around the water outlet channel. By providing the second heating ring, the water outlet channel can be prevented from freezing, thus allowing condensate to drain smoothly and ensuring the condensation effect of the mold.

[0071] Specifically, the material of the second heating coil can be an alloy, such as an iron-chromium-aluminum alloy or a nickel-chromium alloy, or it can be a platinum or silicon carbide rod, etc. This application does not make any specific limitations.

[0072] The working process of the spherical ice preparation mold in this embodiment is as follows: First, the upper mold 1 and the lower mold 2 are fastened together, and water is filled into the spherical cavity through the injection port. Then, the low-temperature refrigerant flows into the annular flow channel 351 surrounding the cavity through the inlet 31. The refrigerant flows through the first pipe 33 and the second pipe 34 in sequence, and finally exits from the outlet 32. The core principle is to utilize the temperature stratification caused by gravity. The low-temperature refrigerant with higher density will naturally accumulate at the bottom of the pipe system, making the bottom area of ​​the spherical cavity the strongest cold source. At the same time, the water in the spherical cavity will undergo significant natural convection. The cold water with lower density and close to the freezing point rises from the bottom, while the warm water with higher density sinks to the bottom to be cooled. This cycle process efficiently transfers heat from the water body as a whole to the bottom cold wall, thereby ensuring that the ice nucleus forms preferentially on the coldest bottom wall surface and promotes the stable growth of the ice layer from bottom to top. After a preset cooling time, the mold is opened to obtain a structurally complete and crystal clear spherical ice.

[0073] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein, and includes various changes and variations without departing from the scope of the present invention.

[0074] In this document, the directional terms such as "front," "rear," "upper," and "lower" are defined according to the positions of the components in the accompanying drawings and the positions between the components, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed by this utility model.

[0075] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0076] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A spherical ice-making mold, characterized in that, The mold includes: The upper mold (1) has a hemispherical upper inner mold cavity; The lower mold (2) has a hemispherical lower inner mold cavity. After the upper mold (1) is connected to the lower mold (2), the upper inner mold cavity and the lower inner mold cavity are connected to form a spherical cavity. A refrigeration pipe (3) for containing refrigeration liquid is spirally wound around the outer periphery of the spherical cavity. The refrigeration pipe (3) has an inlet (31) and an outlet (32). The inlet (31) is located in the area of ​​the lower mold (2), and the outlet (32) is located in the area of ​​the upper mold (1). The refrigeration liquid flows in from the inlet (31) and flows out from the outlet (32).

2. The mold according to claim 1, characterized in that, The liquid inlet (31) is located in the bottom area of ​​the lower mold (2), and the liquid outlet (32) is located in the top area of ​​the upper mold (1).

3. The mold according to claim 1, characterized in that, The upper mold (1) includes an upper inner mold (11) having the hemispherical upper inner mold cavity, the lower mold (2) includes a lower inner mold (21) having the hemispherical lower inner mold cavity, and the refrigeration pipe (3) includes a first pipe (33) and a second pipe (34). The first pipe (33) is spirally wound around the outer wall of the lower inner mold (21), and the second pipe (34) is spirally wound around the outer wall of the upper inner mold (11). The first pipe (33) has a first inlet (331) and a first outlet (332) communicating with the first inlet (331). The second pipe (34) has a second inlet (341) and a liquid outlet (32) communicating with the second inlet (341). The first inlet (331) is connected to the liquid inlet (31), and the second inlet (341) is connected to the first outlet (332).

4. The mold according to claim 3, characterized in that, The lower mold (2) also includes a bottom mold (35), which is connected to the bottom of the lower inner mold (21) and is provided with an annular flow channel (351). The annular flow channel (351) has the liquid inlet (31) and is connected to the first inlet (331) of the first pipe (33). The refrigerant flows into the annular flow channel (351) from the liquid inlet (31), and flows through the first pipe (33) and the second pipe (34) in sequence before flowing out from the liquid outlet (32).

5. The mold according to claim 4, characterized in that, The bottom mold (35) is provided with a flow guide (352), which is disposed in the annular flow channel (351). The flow guide (352) can change the flow direction of the liquid in the annular flow channel (351).

6. The mold according to claim 4, characterized in that, The bottom mold (35) is provided with a recessed portion, and the bottom of the lower inner mold (21) is at least partially accommodated in the recessed portion.

7. The mold according to any one of claims 1-6, characterized in that, The mold includes an adhesive layer, and the upper mold (1) and the lower mold (2) are respectively connected to the refrigeration pipe (3) through the adhesive layer.

8. The mold according to any one of claims 1-6, characterized in that, The upper mold (1) has a drain pipe (13), one end of which is connected to the spherical cavity and the other end is connected to the outside.

9. The mold according to claim 8, characterized in that, The mold also includes a heating element, which is arranged around the drain pipe.

10. The mold according to any one of claims 1-6, characterized in that, The mold satisfies at least one of the following characteristics: The lower mold (2) has a liquid injection port, which is connected to the spherical cavity; The bottom of the lower mold (2) is provided with a water outlet, which is connected to the outside.

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