Ice water preparation device

Abstract

The application discloses an ice water preparation device, which is arranged at least partially in a quick-freezing tunnel in a workshop. The quick-freezing tunnel comprises a tunnel main body, a cold source heat exchange fin and a circulating fan. The ice water preparation device comprises an inlet water pipeline, an outlet water pipeline and a plurality of heat exchange pipe groups connected between the inlet water pipeline and the outlet water pipeline. The plurality of heat exchange pipe groups are arranged in the tunnel main body. The heat exchange pipe group comprises a first main pipe body connected to the inlet water pipeline, a second main pipe body connected to the outlet water pipeline and a plurality of branch pipe bodies connected between the first main pipe body and the second main pipe body. The plane where the plurality of branch pipe bodies are located is parallel to the air inlet surface of the cold source heat exchange fin. The original cold energy in the quick-freezing tunnel in the workshop is used as a cold source to prepare ice water, so that the production cost and the reconstruction period are reduced.

Description

Technical Field

[0001] This application relates to the field of cooling equipment, and in particular to an ice water preparation device. Background Technology

[0002] One step in the pretreatment of fruit pulp is heating the jam to prevent browning and to sterilize it. After this pretreatment, the fruit jam is typically around 35°C. If it is directly bottled and sealed, the bottles will collapse due to thermal expansion and contraction as the pulp cools to room temperature. Furthermore, in certain seasons, fruit production workshops use quick-freezing tunnels to rapidly cool fresh fruit to -18°C for instant freshness preservation. However, during the washing and other related processes, the product's temperature is relatively high before entering the quick-freezing tunnel. To cool it to the target temperature of -18°C, the flow rate within the tunnel must be reduced to ensure sufficient cooling. This not only reduces production efficiency but may also negatively impact the quality of the finished product due to prolonged residence time in the quick-freezing tunnel.

[0003] Typically, dedicated chiller units are installed in factories to meet the aforementioned cooling requirements. However, these chiller units need to be located outside the workshop and supply chilled water to designated locations inside the workshop via pipelines. The purchase cost of chiller units is relatively high, and because the pipelines for supplying chilled water from the outside to designated locations inside the workshop are long, there is significant loss of cooling capacity. Utility Model Content

[0004] This application provides an ice water preparation device that uses the cold energy in the existing quick-freezing tunnel in the workshop as a cold source to prepare ice water, and integrates the ice water delivery pipeline into the existing pipe group in the workshop. This reduces costs, shortens the ice water delivery distance, and reduces cold energy loss during the delivery process.

[0005] To achieve the above objectives, this application provides an ice water preparation device, at least partially installed in a quick-freezing tunnel inside a workshop. The quick-freezing tunnel includes a tunnel body, a cold source heat exchange plate disposed within the tunnel body and through which a refrigerant flows, and a circulating fan for circulating the internal air of the tunnel body through the cold source heat exchange plate. The ice water preparation device includes an inlet pipe, an outlet pipe, and multiple heat exchange tube assemblies connected between the inlet pipe and the outlet pipe. All of the multiple heat exchange tube assemblies are disposed within the tunnel body. Each heat exchange tube assembly includes a first main pipe connected to the inlet pipe, multiple branch pipes connected to the first main pipe, and a second main pipe connected to all of the branch pipes. The plane common to the multiple branch pipes is arranged parallel to the air inlet surface of the cold source heat exchange plate.

[0006] In some embodiments, the inlet ends of the first main body and the second main body of all the heat exchange tube assemblies are connected to the water inlet pipe, and the outlet end of the first main body is connected to the water outlet pipe; the ice water preparation device further includes a switching valve group for changing the connection relationship between the multiple heat exchange tube assemblies, the switching valve group including: a first switching valve disposed at the inlet end of the first main body, a second switching valve disposed at the inlet end of the second main body, a third switching valve disposed on the water inlet pipe corresponding to the first main body and the second main body, and a fourth switching valve disposed at the outlet end of the first main body.

[0007] In some embodiments, the chilled water preparation apparatus further includes a heat exchange tube vent valve for venting the heat exchange tube assembly, and / or, the chilled water preparation apparatus further includes an outlet pipe vent valve for venting the outlet pipe.

[0008] In some embodiments, the ice water preparation apparatus further includes a water replenishment line for replenishing water into the water inlet pipeline, the water replenishment line including a water replenishment pipeline connecting the workshop main water tank to the water inlet pipeline.

[0009] In some embodiments, the water supply line further includes: a water supply branch pipe connected between the water inlet pipe and the water outlet pipe, a water supply control valve disposed on the water supply branch pipe, and an insulated water tank connected to the water outlet pipe.

[0010] In some embodiments, the water supply pipeline is further provided with a water supply switch control valve for connecting / closing the workshop main water tank and the water inlet pipeline.

[0011] In some embodiments, the outlet pipe is connected to the chilled water inlet pipe of the distribution pipe to output chilled water to a preset location within the distribution pipe; after releasing its cooling capacity through heat exchange, the chilled water output to the distribution pipe is connected to the inlet pipe via the return pipe.

[0012] In some embodiments, a main return valve for connecting / closing the return water pipeline and the inlet water pipeline is provided on the return water pipeline, and an ice water inlet valve for connecting / closing the ice water inlet pipeline is provided on the ice water inlet pipeline; when water is added to the inlet water pipeline, the main return water valve and the ice water inlet valve are closed, and the water replenishment control valve, the second switch valve, the third switch valve and the fourth switch valve are all opened, and the refrigeration equipment of the quick-freezing tunnel is started when the liquid level in the insulated water tank exceeds 2 / 3.

[0013] In some embodiments, the water supply pipeline is further equipped with a booster pump for pressurizing the water output from the workshop's main water tank.

[0014] In some embodiments, the first main pipe and the second main pipe have the same diameter, and the diameter of the first main pipe is greater than or equal to three times the diameter of the branch pipe.

[0015] The technical solution provided by the embodiments of this application can include the following beneficial effects: Inside the tunnel body, the internal air circulates through the cold source heat exchange fins driven by a circulating fan, and the internal air cools down during contact with the cold source heat exchange fins. The plane where multiple branch pipes are located is parallel to the air inlet surface of the cold source heat exchange fins, thus ensuring that the heat exchange tube assembly can fully utilize the cooling capacity inside the tunnel body, fully cooling the water flowing into the inlet pipe before outputting it through the outlet pipe. This ice water preparation process utilizes the existing quick-freezing tunnel in the workshop to provide cooling capacity, saving the cost of purchasing ice water making equipment. Meanwhile, the quick-freezing tunnel is shut down for specific periods each year. During this time, heat exchange tube assemblies and other related structures are installed within it. At this time, other areas of the workshop, except for the quick-freezing tunnel, do not need to stop work. After the construction of some structures within the quick-freezing tunnel is completed, work can stop again to integrate the inlet and outlet water pipes into the existing water pipelines in the workshop, significantly shortening the overall construction period.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a quick-freezing tunnel according to an embodiment of this application. The diagram also shows the orientation of the heat exchange tube assembly within the tunnel body. Figure 2 This is a schematic diagram of the pipeline arrangement of an ice water preparation device according to an embodiment of this application. The ice water preparation device is connected to a dispensing pipeline. Figure 3 This is a schematic diagram of the workshop pipeline layout structure of an ice water preparation apparatus according to an embodiment of this application. The ice water preparation apparatus is shown in a box in the figure, and is related to... Figure 2 In contrast, the diagram shows two parallel distribution pipelines; Figure 4 This is a three-dimensional structural schematic diagram of a heat exchange tube assembly according to an embodiment of this application.

[0018] Figure label: 100. Ice water preparation device; 11. Inlet pipe; 12. Outlet pipe; 13. Heat exchanger tube assembly; 131. First main pipe; 132. Second main pipe; 133. Branch pipe; 14. Insulated water tank; 15. Ice water booster pump; 16. Makeup water pipe; 17. Makeup water branch pipe; 18. Makeup water control valve; 1.1. First switch valve; 1.2. Second switch valve; 1.3. Third switch valve; 1.4. Fourth switch valve; 1.5. Heat exchanger tube vent valve; 1.6. Outlet pipe vent valve; 1.7. Ice water switch valve; 1.8. Vent shut-off valve; 1.9. Makeup water switch control valve; 200. Quick-freezing tunnel; 21. Tunnel main body; 22. Cold source heat exchange fins; 23. Circulating fan; 300. Mixing pipeline; 31. Mixing tank; 32. Discharge heat exchanger; 33. Chill water inlet pipeline; 331. Chill water branch line 1; 332. Chill water branch line 2; 34. Discharge pipeline 1; 35. Discharge pipeline 2; 361. Return water pipeline 1; 362. Return water pipeline 2; 3.1. Main return water valve; 3.2. Chill water inlet valve; 400. Main water tank in the workshop; 41. Main water pipe in the workshop. Detailed Implementation

[0019] The terms "first," "second," and similar terms used in this application and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise stated, the terms "front," "rear," "lower," and / or "upper," and similar terms are for illustrative purposes only and are not limited to a location or spatial orientation. The terms "comprising" or "including," and similar terms, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," and similar terms are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0020] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0021] Before describing the various embodiments of this application, the background of this application is first given. As described in the preceding "Background Art," in workshops for the preparation of frozen fresh fruits and jams, ice makers are often required to cool raw materials and intermediate materials. However, depending on the installation requirements, ice makers are usually installed in the peripheral space of the workshop. Not only are the equipment costs of ice makers high, but also, because the ice maker is not located inside the workshop, the prepared ice water needs to be transported over long distances, resulting in significant loss of cooling capacity.

[0022] When introducing ice-making machines to existing food production workshops, the entire process, including procurement, pipeline layout, and water testing, takes approximately two months. During this period, the workshop needs to shut down, significantly impacting production efficiency. To address the ice-water preparation issue while shortening the downtime and construction period and saving on renovation costs, the applicant proposes the solution described in this application.

[0023] like Figure 1 and Figure 2 As shown, this application discloses an ice water preparation device for preparing 5°C ice water that can be delivered to a predetermined location within a workshop, such as the dispensing pipeline 300 mentioned later. At least a portion of the ice water preparation device is located within a quick-freezing tunnel 200 inside the workshop, thereby using the cold energy within the quick-freezing tunnel 200 as the cold source for the ice water.

[0024] In food production workshops, to meet the process requirements of quick-freezing for freshness preservation or rapid freezing and shaping, equipment such as... Figure 1 The quick-freezing tunnel 200 shown in the diagram typically reaches temperatures as low as -35°C. Due to seasonal factors, the quick-freezing tunnel 200 does not need to be operated for at least one quarter of the year. Therefore, the piping installation inside the quick-freezing tunnel 200 can be completed during its downtime, while other parts of the workshop can continue to operate normally. After the construction inside the quick-freezing tunnel 200 is completed, the piping can be integrated into the workshop's piping system as needed. In this way, the overall downtime construction period can be shortened from the aforementioned two months to approximately 20 days.

[0025] The structure of a quick-freezing tunnel can be as follows: Figure 1 As shown, it includes a tunnel body 21, a cold source heat exchange plate 22 disposed inside the tunnel body 21 and through which a cooling medium flows, and a circulating fan 23 for circulating the internal air of the tunnel body 21 through the cold source heat exchange plate 22.

[0026] Low-temperature refrigerant circulates within the cold source heat exchange plate 22. When the circulating fan 23 drives the air inside the tunnel body 21 to circulate through the cold source heat exchange plate 22, the airflow carries away the cold energy from the low-temperature refrigerant, thereby reducing the temperature inside the tunnel body 21 to about -35°C.

[0027] Ice water preparation apparatus is roughly as follows Figure 2 The left-hand portion includes an inlet pipe 11, an outlet pipe 12, and multiple heat exchanger tube assemblies 13 connecting the inlet pipe 11 and the outlet pipe 12. The multiple heat exchanger tube assemblies 13 are all located in... Figure 1 Inside the main tunnel 21.

[0028] Combination Figure 1 and Figure 4 As shown, the heat exchange tube assembly 13 installed in the tunnel body 21 is used to exchange heat with the cold air in the tunnel body 21, so as to cool the water flowing into the heat exchange tube assembly 13 through the water inlet pipe 11 to ice water that meets the production requirements, and output it through the water outlet pipe 12.

[0029] The heat exchange tube assembly 13 includes a first main tube 131 connected to the water inlet pipe 11, multiple branch tubes 133 connected at one end to the first main tube 131, and a second main tube 132 connected to the other end of all the branch tubes 133. The plane in which the multiple branch tubes 133 are located is parallel to the air inlet surface of the cold source heat exchange plate 22.

[0030] like Figure 1 As shown in the diagram, the direction of air circulation driven by the circulating fan 23 is indicated by the circular arrow. When flowing through the heat exchange tube assembly 13, the cold air flows along the direction of the solid arrow in the diagram towards the plane where multiple branch pipes 133 are located, and passes through the gaps between adjacent branch pipes 133, and then flows through the cold source heat exchange plate 22. In this way, the water in the heat exchange tube assembly 13 fully contacts and exchanges heat with the cold air in the tunnel body 21 when flowing through the branch pipes 133. The ambient temperature water or the high temperature water after the heat exchange releases its cooling capacity flows in through the first main body 131 and is distributed to multiple branch pipes 133. The cooled ice water enters through the first main body 131. Figure 2 Water outlet pipe 12.

[0031] Furthermore, such as Figure 4 As shown, the first main pipe 131 and the second main pipe 132 have the same diameter, and the diameter of the first main pipe 131 is greater than or equal to three times the diameter of the branch pipe 133. This ensures that water can be smoothly distributed and merged within the heat exchange tube assembly 13.

[0032] By controlling the flow rate of water within the heat exchange tube assembly 13 and the overall residence time within the tunnel body 21, the final water temperature output to the outlet pipe 12 can be controlled. In one embodiment of this application, the inlet ends of the first main body 131 and the second main body 132 of all heat exchange tube assemblies 13 (i.e., Figure 2 The upper end of the first main body 131 is connected to the inlet pipe 11, and the outlet end of the first main body 131 is connected to the outlet pipe 12.

[0033] The chilled water preparation device also includes a switching valve group for changing the connection relationship between multiple heat exchanger tube groups 13. By changing the combination of the on / off states of multiple valves in the switching valve group, the multiple heat exchanger tube groups 13 can be connected in parallel or in series. For example, when preparing chilled water with a temperature between 8°C and 15°C, the multiple heat exchanger tube groups 13 are preferably connected in parallel to shorten the time that the internal water flows through the heat exchanger tube groups 13; while when preparing chilled water with a temperature between 2°C and 8°C, the multiple heat exchanger tube groups 13 can be connected in series to extend the time that the internal water flows through the heat exchanger tube groups 13 as much as possible to achieve sufficient cooling.

[0034] refer to Figure 2 As shown, in one embodiment, the switching valve assembly may include a first switching valve 1.1 disposed at the inlet end of the first main pipe 131, a second switching valve 1.2 disposed at the inlet end of the second main pipe 132, a third switching valve 1.3 disposed on the water inlet pipe 11 between the first main pipe 131 and the second main pipe 132, and a fourth switching valve 1.4 disposed at the outlet end of the first main pipe 131. It is understood that these switching valves can all be manually operated shut-off valves, or electrically controlled valves can be selected according to electrical control requirements, as long as they can satisfy the opening and closing of local pipelines.

[0035] As mentioned earlier, when preparing chilled water at a temperature between 8°C and 15°C, multiple heat exchanger tube groups 13 need to be connected in parallel. In this scenario, this can be achieved by closing the first switching valve 1.1 while simultaneously opening the second switching valve 1.2, the third switching valve 1.3, and the fourth switching valve 1.4. Thus, with... Figure 1 Taking the implementation of the four heat exchange tube groups 13 shown as an example, the water flowing in through the inlet pipe 11 passes through the first third switch valve 1.3 on the right side, and then enters the heat exchange tube group 13 through the second switch valve 1.2 at the inlet end of the first heat exchange tube group 13. After flowing through the corresponding branch pipe body 133, the heat exchange is completed, and then it flows out to the outlet pipe 12 through the fourth switch valve 1.4 at the outlet end of the heat exchange tube group 13.

[0036] Similarly, water flowing in through the inlet pipe 11 passes through the second, third, and fourth third switch valves 1.3 on the right side, and then enters the corresponding heat exchange tube group 13 through the second switch valve 1.2 at the inlet. After flowing through the corresponding branch pipe 133 to complete heat exchange, it flows out through the fourth switch valve 1.4 at the outlet end of the corresponding heat exchange tube group 13 to the outlet pipe 12. The four heat exchange tube groups 13 perform heat exchange processes simultaneously and finally converge into the outlet pipe 12 to output chilled water. Since the water only flows through a single heat exchange tube group 13, the temperature drop is not significant, and it can be used to prepare chilled water between 8°C and 15°C.

[0037] When preparing chilled water at a temperature between 2°C and 8°C, multiple heat exchanger tube groups 13 need to be connected in series. In this scenario, this can be achieved by closing the first three third-side valves 1.3 and the three fourth-side valves 1.4 from the right side, leaving only the third-side valve 1.3 and the fourth-side valve 1.4 furthest from the inlet pipe 11 open, while simultaneously opening all the second-side valves 1.2. Similarly... Figure 1 Taking the implementation of the four heat exchanger tube assemblies 13 shown as an example, water flowing into the inlet pipe 11 enters the first heat exchanger tube assembly 13 through the first switch valve 1.1, then continues to flow out through the second switch valve 1.2, and sequentially flows through the second and third heat exchanger tube assemblies 13 in the same manner. Subsequently, water exiting the third heat exchanger tube assembly 13 enters the fourth heat exchanger tube assembly 13 through the corresponding third switch valve 1.3, and then flows into the outlet pipe 12 through the fourth switch valve 1.4.

[0038] In the above process, water flows sequentially through four heat exchanger tube groups 13. The water temperature decreases with each heat exchanger tube group 13 it flows through, ultimately achieving an ice water output of 2°C-8°C. It is understandable that... Figure 2 The above description uses four heat exchanger tube groups 13 as an example. The number of heat exchanger tube groups 13 can be increased or decreased depending on factors such as different water temperature requirements and the internal space size of the tunnel body 21. The key is to ensure that water can flow out normally without freezing inside the quick-freezing tunnel 200. When connected in series, the switching valve on the last heat exchanger tube group 13 is configured differently from the previous heat exchanger tube groups 13 to meet the needs of heat exchange and chilled water output.

[0039] Continue to refer to Figure 2 As shown, in one embodiment, the ice water preparation apparatus further includes a heat exchange tube venting valve 1.5 for venting the heat exchange tube assembly 13. As illustrated, each heat exchange tube assembly 13 has a heat exchange tube venting valve 1.5 installed at the outlet end of the second main tube body 132. When the heat exchange tube venting valve 1.5 is opened, the water in the heat exchange tube assembly 13 can be vented out, thereby preventing the water from freezing inside the heat exchange tube assembly 13 due to the low temperature in the quick-freezing tunnel 200 during non-working hours, which could affect the next ice water production process or even cause the tube body of the heat exchange tube assembly 13 to crack.

[0040] In addition, the ice water preparation apparatus may also include an outlet pipe drain valve 1.6 for draining the outlet pipe 12. Similar to the heat exchange tube drain valve 1.5, the outlet pipe drain valve 1.6 can drain the water in the outlet pipe 12 when it is open.

[0041] refer to Figure 2 and Figure 3As shown, the outlet pipe 12 is connected to the chilled water inlet pipe 33 of the mixing pipeline 300 to output chilled water to a predetermined location within the mixing pipeline 300. In the illustrated embodiment, the mixing pipeline 300 includes a mixing tank 31 and a discharge heat exchanger 32, wherein the mixing tank 31 is configured with a jacketed structure. Introducing chilled water or hot water (the hot water pipe is omitted in the figure) into the jacket can change the temperature of the material inside the mixing tank 31.

[0042] The chilled water flowing into the chilled water inlet pipe 33 via the outlet pipe 12 can be divided into chilled water branch 1 331 and chilled water branch 2 332 as needed, and then enter the jacket of the mixing tank 31 and the sleeve of the discharge heat exchanger 32, respectively. In addition, materials such as jam and pulp discharged from the mixing tank 31 can enter the discharge heat exchanger 32 through the discharge pipe 1 34. In this way, the materials can exchange heat with the chilled water on both sides in the mixing tank 31 and the discharge heat exchanger 32 in sequence to cool down. The cooled materials flow out through the discharge pipe 2 35 and enter the packaging or the next processing stage.

[0043] The chilled water output to the distribution pipeline 300 releases its cooling capacity through heat exchange and then connects to the inlet pipeline 11 via the return water pipeline to achieve water recycling. Figure 2 In the illustrated embodiment, the jacket of the mixing tank 31 inputs the heat-exchanged hot water into the inlet pipe 11 through the return water pipeline 2 362, while the sleeve in the discharge heat exchanger 32 inputs the heat-exchanged hot water into the inlet pipe 11 through the return water pipeline 1 361.

[0044] In addition, Figure 3 In the embodiment shown, there are two sets of distribution pipelines 300 in parallel, and the inflow / outflow of chilled water and the inflow / outflow of materials are consistent with the above description.

[0045] Combination Figure 2 and Figure 3 As shown, in some embodiments, the chilled water preparation apparatus may further include a water replenishment line for replenishing water into the inlet pipe 11, the water replenishment line including a water replenishment pipe 16 connecting the workshop main water tank 400 to the inlet pipe 11. It is understood that the water replenishment referred to herein may be the process of adding water to the pipe to meet the requirements when the chilled water preparation apparatus 100 is first started, or it may be the process of adding water to the pipe to meet the requirements again after each shutdown and evacuation, and upon restarting.

[0046] The water supply line may also include: a water supply branch pipe 17 connecting the inlet pipe 11 and the outlet pipe 12, a water supply control valve 18 installed on the water supply branch pipe 17, and an insulated water tank 14 connected to the outlet pipe 12. The insulated water tank 14 allows the ice water flowing out of the outlet pipe 12 to be temporarily stored in the insulated water tank 14 and pumped into the distribution pipeline 300 at an appropriate speed as needed.

[0047] The water supply line 16 is also equipped with a water supply switch control valve 1.9 for connecting / closing the workshop main water tank 400 and the water inlet line 11. In addition, in order to ensure that water can flow smoothly into the ice water preparation device 100, the water supply line 16 is also equipped with a pressure pump and a filter device (shown in the figure but not marked).

[0048] A main return water valve 3.1 is installed on the return water pipeline after the confluence of return water pipeline 1 (361) and return water pipeline 2 (362) to connect / disconnect the return water pipeline and the inlet water pipeline 11. A chilled water inlet valve 3.2 is installed on the chilled water inlet pipeline 33 to connect / disconnect the chilled water inlet pipeline 33.

[0049] When water is added to the inlet pipe 11, the return water main valve 3.1 and the chilled water inlet valve 3.2 are closed, thereby disconnecting the connection between the chilled water preparation device 100 and the distribution pipeline 300. At this time, the water replenishment control valve 18, the second switch valve 1.2, the third switch valve 1.3, and the fourth switch valve 1.4 are all opened, and the water replenishment pipe 16 carries the water from the workshop's main water tank 400 to the chilled water preparation device, filling all the heat exchange tube groups 13. When the liquid level in the insulation water tank 14 exceeds 2 / 3, the water replenishment is considered complete, and the refrigeration equipment of the quick-freezing tunnel 200 can be started.

[0050] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An ice water preparation device, at least partially disposed within a quick-freezing tunnel (200) inside a workshop, the quick-freezing tunnel comprising a tunnel body (21), a cold source heat exchange plate (22) disposed within the tunnel body (21) and through which a refrigerant flows, and a circulating fan (23) for circulating the internal air of the tunnel body (21) through the cold source heat exchange plate (22), characterized in that, The ice water preparation device includes an inlet pipe (11), an outlet pipe (12), and a plurality of heat exchange tube groups (13) connected between the inlet pipe (11) and the outlet pipe (12), and the plurality of heat exchange tube groups (13) are all arranged inside the tunnel body (21); The heat exchange tube assembly (13) includes a first main tube (131) connected to the water inlet pipe (11), multiple branch tubes (133) connected to the first main tube (131), and a second main tube (132) connected to all the branch tubes (133). The plane where the multiple branch tubes (133) are located is parallel to the air inlet surface of the cold source heat exchange plate (22).

2. The ice water preparation apparatus according to claim 1, characterized in that, The inlet ends of the first main body (131) and the second main body (132) of all the heat exchange tube assemblies (13) are connected to the water inlet pipe (11), and the outlet end of the first main body (131) is connected to the water outlet pipe (12); the ice water preparation device also includes a switching valve assembly for changing the connection relationship between the multiple heat exchange tube assemblies (13), the switching valve assembly including: A first switch valve (1.1) is provided at the inlet end of the first main body (131), a second switch valve (1.2) is provided at the inlet end of the second main body (132), a third switch valve (1.3) is provided on the water inlet pipe (11) between the first main body (131) and the second main body (132), and a fourth switch valve (1.4) is provided at the outlet end of the first main body (131).

3. The ice water preparation apparatus according to claim 2, characterized in that, The ice water preparation device further includes a heat exchange tube vent valve (1.5) for venting the heat exchange tube assembly (13), and / or, The ice water preparation device also includes an outlet pipe drain valve (1.6) for draining the outlet pipe (12).

4. The ice water preparation apparatus according to claim 3, characterized in that, The ice water preparation device also includes a water replenishment line for replenishing water into the water inlet pipe (11), the water replenishment line including a water replenishment pipe (16) connecting the workshop main water tank (400) to the water inlet pipe (11).

5. The ice water preparation apparatus according to claim 4, characterized in that, The water supply line also includes: a water supply branch pipe (17) connected between the water inlet pipe (11) and the water outlet pipe (12), a water supply control valve (18) installed on the water supply branch pipe (17), and an insulated water tank (14) connected to the water outlet pipe (12).

6. The ice water preparation apparatus according to claim 5, characterized in that, The water supply pipeline (16) is also equipped with a water supply switch control valve (1.9) for connecting / closing the workshop main water tank (400) and the water inlet pipeline (11).

7. The ice water preparation apparatus according to claim 6, characterized in that, The outlet pipe (12) is connected to the chilled water inlet pipe (33) of the distribution pipe (300) to output chilled water to a preset position in the distribution pipe (300); after the chilled water output to the distribution pipe (300) releases its cold energy through heat exchange, it is connected to the inlet pipe (11) through the return pipe.

8. The ice water preparation apparatus according to claim 7, characterized in that, The return water pipeline is equipped with a return water main valve (3.1) for connecting / closing the return water pipeline and the inlet water pipeline (11), and the chilled water inlet pipeline (33) is equipped with a chilled water inlet valve (3.2) for connecting / closing the chilled water inlet pipeline (33). When water is added to the inlet pipe (11), the return water main valve (3.1) and the ice water inlet valve (3.2) are closed, and the water replenishment control valve (18), the second switch valve (1.2), the third switch valve (1.3) and the fourth switch valve (1.4) are all opened. When the liquid level in the insulated water tank (14) exceeds 2 / 3, the refrigeration equipment of the quick-freezing tunnel (200) is started.

9. The ice water preparation apparatus according to claim 8, characterized in that, The water supply pipeline (16) is also equipped with a pressurizing pump for pressurizing the water output from the workshop's main water tank (400).

10. The ice-water preparation apparatus according to any one of claims 1-9, characterized in that, The first main pipe (131) and the second main pipe (132) have the same pipe diameter, and the pipe diameter of the first main pipe (131) is greater than or equal to three times the pipe diameter of the branch pipe (133).

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