A straw cooling device

CN224726400UActive Publication Date: 2026-09-08TIANJIN QUANYUZHENG PLASTIC PROD
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Patent Information

Application Number
CN202522077617.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-26
Publication Date
2026-09-08
Estimated Expiration
2035-09-26

AI Technical Summary

Technical Problem

[0004]有鉴于此,本实用新型旨在提出一种吸管冷却降温装置,以解决传统水冷方式因塑料吸管内外压力不平衡导致的吸管发生屈曲失稳,产生压缩变形的问题

Benefits of technology

本实用新型所述的一种吸管冷却降温装置,设置了内圈安装多个喷嘴的第一环形管,且多个喷嘴均位于吸管的外围,可以对吸管进行全面喷水降温,向相较于传统冷水浸泡的形式,喷水降温可以保证冷却的均匀性,减少吸管变形的现象,提高产品质量,减少吸管在水中浸泡的时间,降低外来污染,提高产品质量。

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Abstract

The utility model provides a kind of straw cooling device, including support, box, cooling assembly, circulating assembly and water blowing unit, the side of support is provided circulating assembly, box is set on support, and the lower end of box is connected to the input end of circulating assembly, the output end of circulating assembly is connected to the side of box, partition is set in box, partition is used to separate space in box and form first cavity and second cavity, and the both ends of box and the middle part of partition are equipped with fixed diameter sleeve, cooling assembly is set in box, and one end of cooling assembly is connected to the side of box, the cooling assembly is located in first cavity, water blowing unit is set in box, and water blowing unit is located in second cavity.The utility model discloses a kind of straw cooling device using spray cooling mode, instead of traditional immersion cooling mode, solve the problem that traditional water cooling mode causes straw buckling instability due to the imbalance of internal and external pressure of plastic straw, produces compression deformation.
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Description

Technical Field

[0001] This utility model belongs to the field of plastic straw production equipment, and in particular relates to a straw cooling and temperature reduction device. Background Technology

[0002] The use of plastic straws is the result of the resonance between technology, consumption and commercial needs in the 20th century. Previously, straws made of natural materials (such as wheat straw) were easily damaged, and metal / glass straws were expensive and inconvenient. However, the development of petrochemicals promoted the maturity of plastic technology, and plastic straws solved the pain points of traditional materials with their advantages of being lightweight, shatterproof, low-cost and capable of rapid mass production.

[0003] During the production of plastic straws, the plastic straws extruded from the extruder are at a high temperature and need to be cooled and shaped to ensure the dimensional accuracy and shape stability of the plastic straws. Currently, the traditional water cooling method is to directly immerse the plastic straws in water for cooling. During the water cooling process, the front end of the plastic tube that has just been extruded is clamped, which prevents the external water pressure from being transmitted to the inner cavity of the tube. If the pressure inside and outside the plastic straw is unbalanced, the external water pressure will cause the tube wall to bear circumferential compressive stress. When this stress exceeds the critical buckling stress of the straw material at high temperature, it will cause the straw to buckle and become unstable, resulting in compression deformation. Utility Model Content

[0004] In view of this, the present invention aims to propose a straw cooling device to solve the problem of straw buckling and instability caused by the pressure imbalance inside and outside the plastic straw in traditional water cooling methods, resulting in compression deformation.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A straw cooling device includes a support, a housing, a cooling component, a circulation component, and a water blowing unit. The circulation component is located on one side of the support, and the housing is mounted on the support. The lower end of the housing is connected to the input end of the circulation component, and one side of the housing is connected to the output end of the circulation component. A partition is installed inside the housing to divide the internal space and form a first cavity and a second cavity. A sizing sleeve is provided at both ends of the housing and in the middle of the partition. The cooling component is installed inside the housing, and one end of the cooling component is connected to one side of the housing. The cooling component is located in the first cavity. The water blowing unit is installed inside the housing and is located in the second cavity. The cooling component is used to cool the straw.

[0006] Furthermore, the housing is also provided with a drain outlet, a connector, and a cover. The lower end of the housing is provided with a drain outlet, and the drain outlet is threaded. The internal thread of the drain outlet is connected to the input end of the circulation component. A connector is provided on one side of the housing, and the outer periphery of the connector is fixedly connected to one side of the housing. The two ends of the connector are respectively fixedly connected to the output end of the circulation component and the input end of the cooling component. A cover is provided on the housing, and the cover is hinged to one side of the housing.

[0007] Furthermore, the straw is disposed inside the box and can move along the axial direction of the box. The outer periphery of the straw is slidably connected to the inner ring of each sizing sleeve.

[0008] Furthermore, the cooling assembly includes a guide unit and a water-cooling unit. The guide unit is disposed inside the housing, and the water-cooling unit is disposed on one side of the guide unit. The input end of the water-cooling unit is fixedly connected to one end of the connector.

[0009] Furthermore, the guide unit includes a slide rail, a slider, and a roller. The two ends of the slide rail are fixedly connected to the two ends of the first cavity, the middle of the slider is provided with a groove, and the groove is slidably connected to the outer periphery of the slide rail. The upper end of the slider is provided with a threaded hole, and a roller is rotatably arranged on one side of the slider, and the outer periphery of the roller is rotatably connected to the outer periphery of the straw. There are two slide rails, and multiple sliders are slidably connected on each slide rail. A roller is rotatably arranged between each pair of corresponding sliders.

[0010] Furthermore, the water-cooling unit includes a distribution pipe, a first connecting pipe, and a first annular pipe. The distribution pipe is fixedly installed on the inner wall of one side of the housing, and one end of the distribution pipe is fixedly connected to one end of the connector. Multiple first connecting pipes are installed on the distribution pipe, and the multiple first connecting pipes are evenly distributed along the axial direction of the distribution pipe. Each first connecting pipe is fixedly connected to the outer periphery of a first annular pipe, and the inner ring of the first annular pipe is located outside the suction tube. The inner ring of the first annular pipe is provided with multiple nozzles, and the multiple nozzles are evenly distributed along the circumference of the inner ring of the first annular pipe. First connecting brackets are provided on both sides of the first annular pipe, and one side of each first connecting bracket abuts against one side of the slide rail.

[0011] Furthermore, the circulation assembly includes a filter unit and a water chiller. The upper end of the filter unit is threaded into the drain outlet, and the lower end of the filter unit is connected to the input end of the water chiller through a pipeline. The output end of the water chiller is fixedly connected to the other end of the connector.

[0012] Furthermore, the filtration unit includes multiple filter boxes, each filter box having a cylindrical structure and a screen in the middle. Both ends of the filter box are threaded, and adjacent filter boxes are connected by threads.

[0013] Furthermore, the water blowing unit includes a second connecting pipe, a second annular pipe, and a second connecting frame. The second connecting frame is fixedly installed in the second cavity, and the second annular pipe is fixedly installed on the second connecting frame. The inner ring of the second annular pipe is evenly distributed with multiple air holes along the circumference. The outer periphery of the second annular pipe is connected to one end of the second connecting pipe, and the outer periphery of the second connecting pipe is fixedly connected to one side of the housing. The other end of the second connecting pipe is connected to the output end of the air source.

[0014] Compared with the prior art, the straw cooling device of this utility model has the following beneficial effects: The present invention discloses a straw cooling device, which is equipped with a first annular pipe with multiple nozzles installed in the inner ring. The multiple nozzles are all located on the periphery of the straw, which can spray water to cool the straw comprehensively. Compared with the traditional method of immersion in cold water, water spraying cooling can ensure the uniformity of cooling, reduce straw deformation, improve product quality, reduce the soaking time of the straw in water, reduce external contamination, and improve product quality. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a straw cooling device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the box described in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the cooling assembly described in an embodiment of the present invention; Figure 4 As described in the embodiments of this utility model Figure 3 A magnified structural diagram of part A in the middle; Figure 5 As described in the embodiments of this utility model Figure 3 A magnified schematic diagram of part B in the middle section; Figure 6 This is a schematic diagram of the structure of the circulation component described in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the filter unit described in an embodiment of the present invention; Figure 8 This is a schematic diagram of the water blowing unit described in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1-Support; 2-Box body; 21-Baffle; 22-First cavity; 23-Second cavity; 24-Sizing sleeve; 25-Drain outlet; 26-Connector; 27-Box cover; 3-Cooling assembly; 31-Guide unit; 311-Slide rail; 312-Slider; 3121-Slide groove; 3122-Threaded hole; 313-Roller; 32-Water cooling unit; 321-Diverter pipe; 322-First connecting pipe; 323-First annular pipe; 3231-Nozzle; 3232-First connecting frame; 4-Circulation assembly; 41-Filter unit; 411-Filter box; 4111-Screen; 42-Water chiller; 5-Water blowing unit; 51-Second connecting pipe; 52-Second annular pipe; 521-Air hole; 53-Second connecting frame; 6-Suction tube. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figure 1-2As shown, a straw cooling device includes a support 1, a housing 2, a cooling assembly 3, a circulation assembly 4, and a water blowing unit 5. The circulation assembly 4 is installed on one side of the support 1, and the housing 2 is installed on the support 1. The lower end of the housing 2 is connected to the input end of the circulation assembly 4, and one side of the housing 2 is connected to the output end of the circulation assembly 4. A partition 21 is installed inside the housing 2 to divide the internal space of the housing 2 and form a first cavity 22 and a second cavity 23. A sizing sleeve 24 is provided at both ends of the housing 2 and in the middle of the partition 21. The cooling assembly 3 is installed inside the housing 2, and one end of the cooling assembly 3 is connected to the housing 2. On one side, the cooling component 3 is located in the first cavity 22, and the water blowing unit 5 is installed in the box 2 and is located in the second cavity 23. Both the cooling component 3 and the water blowing unit 5 are used to cool the suction tube 6. By setting the partition 21, the internal space of the box 2 is divided into the first cavity 22 and the second cavity 23, which can realize the cooling and drying in separate areas, reduce the water mist sprayed into the drying area, and reduce the impact on subsequent processing, improve work efficiency, and reduce manual labor. The entire box 2 can be made of transparent acrylic material, which facilitates the observation of internal parts and suction tubes to be cooled, and improves product quality and work efficiency.

[0022] The housing 2 is also equipped with a drain outlet 25, a connector 26, and a cover 27. The drain outlet 25 is located at the lower end of the housing 2 and has internal threads. The internal threads of the drain outlet 25 are connected to the input end of the circulation component 4. A connector 26 is located on one side of the housing 2, and the outer periphery of the connector 26 is fixedly connected to one side of the housing 2. The two ends of the connector 26 are respectively fixedly connected to the output end of the circulation component 4 and the input end of the cooling component 3. A cover 27 is provided on the housing 2 and is hinged to one side of the housing 2. A suction tube 6 is located inside the housing 2. It can move along the axial direction of the box body 2. The outer periphery of the suction tube 6 is slidably connected to the inner ring of each sizing sleeve 24. It is provided with a threaded drain port 25, which can collect and recycle the water in the first cavity 22, reduce resource waste and environmental pollution, and reduce production costs. The box cover 27 can reduce water mist splashing and reduce production safety hazards. In this embodiment, the bottom of the box body 2 is an inclined structure. The inclined bottom structure is conducive to the discharge and collection of water, improves work efficiency, reduces the retention of water in the first cavity 22, and reduces the phenomenon of bacterial growth.

[0023] like Figure 3 As shown, the cooling assembly 3 includes a guide unit 31 and a water cooling unit 32. The guide unit 31 is installed inside the housing 2, and the water cooling unit 32 is installed on one side of the guide unit 31. The input end of the water cooling unit 32 is fixedly connected to one end of the connector 26. By setting the guide unit 31 to limit the running trajectory of the suction tube 6, the downtime caused by the position deviation of the suction tube 6 during the water cooling process is prevented, thereby reducing the waste of manpower and material resources and improving work efficiency.

[0024] like Figure 3-5 As shown, the guide unit 31 includes a slide rail 311, a slider 312, and a roller 313. The two ends of the slide rail 311 are fixedly connected to the two ends of the first cavity 22. The middle part of the slider 312 is provided with a groove 3121, and the groove 3121 is slidably connected to the periphery of the slide rail 311. The upper end of the slider 312 is provided with a threaded hole 3122. The roller 313 is rotatably arranged on one side of the slider 312. There are two slide rails 311, and multiple sliders 312 are slidably connected on each slide rail 311. A roller 313 is rotatably arranged between each pair of corresponding sliders 312. The sliders 312 are slidably connected to the slide rails 311, and the roller 313 can be moved according to the characteristics of the straw 6. It is fixed by the threaded connection of the fixing parts in the threaded hole 3122, which facilitates finding the best support and traction position, ensuring the stability of the running trajectory of the straw 6, ensuring the continuity of the cooling work, reducing manual labor, and improving work efficiency.

[0025] like Figure 3-5 As shown, the water-cooling unit 32 includes a distribution pipe 321, a first connecting pipe 322, and a first annular pipe 323. The distribution pipe 321 is fixedly installed on the inner wall of one side of the housing 2, and one end of the distribution pipe 321 is fixedly connected to one end of the connector 26. Multiple first connecting pipes 322 are installed on the distribution pipe 321, and these multiple first connecting pipes 322 are evenly distributed along the axial direction of the distribution pipe 321. Each first connecting pipe 322 is fixedly connected to the outer periphery of a first annular pipe 323, and the inner ring of the first annular pipe 323 is located outside the suction tube 6. Multiple nozzles 3231 are provided on the inner ring of the first annular pipe 323, and these multiple nozzles 3231 are evenly distributed along the circumference of the inner ring of the first annular pipe 323. The first connecting frame 3232 is provided on both sides of the 23, and one side of each first connecting frame 3232 abuts against one side of the slide rail 311. The first connecting pipe 322 is a retractable threaded pipe. By setting the first connecting frame 3232 and the first connecting pipe 322, the position of the first annular pipe 323 can be adjusted to adapt to the cooling work of the straw 6 with different characteristics. The nozzle 3231 is a low-pressure atomizing nozzle in the prior art, model HBCY-ZB-I. It has a wide coverage area and produces droplets with a diameter of 60-80 micrometers, which is conducive to the uniform contact of water mist with the outer periphery of the straw 6 and will not damage the outer surface of the straw 6, thereby improving the uniformity of cooling and improving product quality.

[0026] like Figure 6As shown, the circulation component 4 includes a filter unit 41 and a water chiller 42. The upper end of the filter unit 41 is threaded to the drain outlet 25, and the lower end of the filter unit 41 is connected to the input end of the water chiller 42 through a pipeline. The output end of the water chiller 42 is fixedly connected to the other end of the connector 26. The circulation component 4 enables water resources to be reused, reducing water waste and environmental pollution, and lowering production costs. The water chiller 42 is a box-type water chiller in the prior art, model SCY-50WT.

[0027] like Figure 7 As shown, the filtration unit 41 includes multiple sets of filter boxes 411. The filter box 411 has a cylindrical structure and a screen 4111 in the middle. Both ends of the filter box 411 are threaded, and adjacent sets of filter boxes 411 are connected by threads. By setting multiple sets of detachable filter boxes 411 and placing filter elements of different mesh sizes in the filter boxes 411, the water accumulated in the box 2 can be filtered, improving the cleanliness of the water used, reducing contamination of the suction pipe 6, reducing clogging of the nozzle 3231, and the threaded connection makes it easy to replace the filter elements inside the filter box 411, thus improving product quality.

[0028] like Figure 8 As shown, the water blowing unit 5 includes a second connecting pipe 51, a second annular pipe 52, and a second connecting frame 53. The second connecting frame 53 is fixedly installed inside the second cavity 23. The second annular pipe 52 is fixedly installed on the second connecting frame 53, and multiple air holes 521 are evenly distributed circumferentially on the inner ring of the second annular pipe 52. The outer ring of the second annular pipe 52 is connected to one end of the second connecting pipe 51, and the outer ring of the second connecting pipe 51 is fixedly connected to one side of the housing 2. The other end of the second connecting pipe 51 is connected to the output end of the air source. By setting air holes 521 in the inner ring of the second annular pipe 52, and the axial position of the air holes 521 forms an angle with the axial position of the suction tube 6, the contact area between the gas and the suction tube 6 during the drying process is increased, thereby improving the drying efficiency.

[0029] The working process of a straw cooling device: First, the straw 6 enters the housing 2 through the sizing sleeve 24 at one end of the housing 2. In the first cavity 22, the outer periphery of the straw 6 is rolledly connected to the roller 313 in the guide unit 31. At the same time, the slider 312 on the slide rail 311 can adjust the position of the roller 313 to fit the straw 6. In the circulation assembly 4, the cooling water output from the water chiller 42 enters the distribution pipe 321 of the cooling assembly 3 through the connector 26, and then is distributed to each of the first annular pipes 323 through the first connecting pipe 322. Cooling water mist is sprayed from the nozzles 3231 on the inner ring of the first annular pipe 323 to the outer periphery of the straw 6 to achieve cooling. The first annular pipe 323 is held stable by abutting the slide rail 311 through the first connecting bracket 3232. After cooling, the water falls to the bottom of the housing 2 and flows into the filter unit 41 through the drain outlet 25. Multiple filter boxes 411 filter impurities through the internal filter element. The cooling water then flows back to the input end of the water chiller 42 to complete the circulation. Subsequently, the suction pipe 6 passes through the sizing sleeve 24 in the middle of the partition 21 and enters the second cavity 23. An external air source supplies air to the second annular pipe 52 fixed to the second connecting frame 53 through the second connecting pipe 51. The air holes 521 in the inner ring of the second annular pipe 52 blow air to the outside of the suction pipe 6 to remove surface moisture. Finally, the suction pipe 6 passes through the sizing sleeve 24 at the other end of the housing 2. During the process, the internal components can be inspected and maintained through the hinged cover 27 on the housing 2.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A straw cooling and temperature reduction device, characterized in that: The device includes a support (1), a housing (2), a cooling assembly (3), a circulation assembly (4), and a water blowing unit (5). The circulation assembly (4) is installed on one side of the support (1), and the housing (2) is installed on the support (1). The lower end of the housing (2) is connected to the input end of the circulation assembly (4), and one side of the housing (2) is connected to the output end of the circulation assembly (4). A partition (21) is installed inside the housing (2). The partition (21) is used to separate the space inside the housing (2) and form a first cavity (22). The second chamber (23) and the two ends of the box (2) and the middle of the partition (21) are provided with sizing sleeves (24). The cooling component (3) is provided in the box (2), and one end of the cooling component (3) is connected to one side of the box (2). The cooling component (3) is located in the first chamber (22). The water blowing unit (5) is provided in the box (2), and the water blowing unit (5) is located in the second chamber (23). The cooling component (3) and the water blowing unit (5) are both used to cool the suction tube (6).

2. The straw cooling device according to claim 1, characterized in that: The box (2) is also provided with a drain outlet (25), a connector (26) and a box cover (27). The lower end of the box (2) is provided with a drain outlet (25), and the drain outlet (25) is provided with a thread. The drain outlet (25) is connected to the input end of the circulation component (4) by the thread. The side of the box (2) is provided with a connector (26), and the outer periphery of the connector (26) is fixedly connected to the side of the box (2). The two ends of the connector (26) are respectively fixedly connected to the output end of the circulation component (4) and the input end of the cooling component (3). The box (2) is provided with a box cover (27), and the box cover (27) is hinged to the side of the box (2).

3. The straw cooling device according to claim 1, characterized in that: The straw (6) is set inside the box (2) and can move along the axial direction of the box (2). The outer periphery of the straw (6) is slidably connected to the inner ring of each sizing sleeve (24).

4. The straw cooling device according to claim 2, characterized in that: The cooling assembly (3) includes a guide unit (31) and a water cooling unit (32). The guide unit (31) is located inside the housing (2). The water cooling unit (32) is located on one side of the guide unit (31), and the input end of the water cooling unit (32) is fixedly connected to one end of the connector (26).

5. The straw cooling device according to claim 1, characterized in that: The guide unit (31) includes a slide rail (311), a slider (312) and a roller (313). The two ends of the slide rail (311) are fixedly connected to the two ends of the first cavity (22). The middle part of the slider (312) is provided with a groove (3121), and the groove (3121) is slidably connected to the periphery of the slide rail (311). The upper end of the slider (312) is provided with a threaded hole (3122). The roller (313) is rotatably arranged on one side of the slider (312), and the periphery of the roller (313) is slidably connected to the periphery of the straw (6). There are two slide rails (311), and multiple sliders (312) are slidably connected on each slide rail (311). A roller (313) is rotatably set between each pair of corresponding sliders (312).

6. The straw cooling device according to claim 5, characterized in that: The water-cooling unit (32) includes a distribution pipe (321), a first connecting pipe (322) and a first annular pipe (323). The distribution pipe (321) is fixedly installed on the inner wall of one side of the box (2), and one end of the distribution pipe (321) is fixedly connected to one end of the connector (26). Multiple first connecting pipes (322) are installed on the distribution pipe (321), and the multiple first connecting pipes (322) are evenly distributed along the axial direction of the distribution pipe (321). Each first connecting pipe (322) is fixedly connected to the outer periphery of a first annular pipe (323), and the inner ring of the first annular pipe (323) is located on the outer periphery of the suction pipe (6). The inner ring of the first annular tube (323) is provided with multiple nozzles (3231), and the multiple nozzles (3231) are evenly distributed along the inner circumference of the first annular tube (323). The two sides of the first annular tube (323) are respectively provided with first connecting frames (3232), and one side of each first connecting frame (3232) abuts against one side of the slide rail (311).

7. The straw cooling device according to claim 2, characterized in that: The circulation component (4) includes a filter unit (41) and a water chiller (42). The upper end of the filter unit (41) is threaded into the drain outlet (25), and the lower end of the filter unit (41) is connected to the input end of the water chiller (42) through a pipeline. The output end of the water chiller (42) is fixedly connected to the other end of the connector (26).

8. The straw cooling device according to claim 1, characterized in that: The filter unit (41) includes multiple filter boxes (411). The filter box (411) is a cylindrical structure, and a screen (4111) is provided in the middle of the filter box (411). The two ends of the filter box (411) are respectively provided with threads, and adjacent filter boxes (411) are connected by threads.

9. A straw cooling device according to claim 1, characterized in that: The water blowing unit (5) includes a second connecting pipe (51), a second annular pipe (52), and a second connecting frame (53). The second connecting frame (53) is fixedly installed in the second cavity (23). The second annular pipe (52) is fixedly installed on the second connecting frame (53). The inner ring of the second annular pipe (52) is evenly distributed with multiple air holes (521) along the circumference. The outer periphery of the second annular pipe (52) is connected to one end of the second connecting pipe (51). The outer periphery of the second connecting pipe (51) is fixedly connected to one side of the box (2). The other end of the second connecting pipe (51) is connected to the output end of the air source.